WO2025040501A1

WO2025040501A1 - Torque transferring device and torsion spring tensioning system

Info

Publication number: WO2025040501A1
Application number: PCT/EP2024/072736
Authority: WO
Inventors: Toby BOETERS; Bert VAN DEN HAZEL; Paul WENSING
Original assignee: Assa Abloy Entrance Systems AB
Current assignee: Assa Abloy Entrance Systems AB
Priority date: 2023-08-21
Filing date: 2024-08-12
Publication date: 2025-02-27
Anticipated expiration: 2026-02-21
Also published as: WO2025040501A8

Abstract

Torque transferring device (600) for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning said torsion spring, the torque transferring device (600) being adapted to be mounted to a shaft (1001) of the counterbalancing mechanism, whereby torque transferring device (600) comprises a torque receiving part (610) adapted to be connected to the tool to receive the torque and an engaging arrangement (32) adapted to engage the shaft (1001) of the counterbalancing mechanism.

Description

TORQUE TRANSFERRING DEVICE AND TORSION SPRING TENSIONING

SYSTEM

Technical field

Present invention relates to a torque transferring device for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning the torsion spring. The present invention further relates to a torsion spring tensioning system comprising a torque transferring device and a tool.

Background

In overhead doors, a counterbalancing mechanism is usually used to counterbalance the weight of the door in order to reduce the force required for operating the door. This reduces the human effort or the motor power required to open the door. The counterbalancing mechanism usually comprises one or two torsion springs arranged around a shaft. One end of the torsion spring is fixed e.g. by a stationary cone. The other end of the torsion spring usually comprises a winding cone that is securable to the shaft by tightening screws and sometimes by a key. The winding cone is commonly provided with four radial holes for winding of the spring either by hand operated rods or by a tensioning tool for tensioning of the spring by rotation of the torsion spring before securing the winding cone to the shaft. In some cases the winding cone may be provided with a set of splines for the same purpose.

One type of tensioning tool is described in US 8 616 093, where a torsion spring winding assembly comprises a coupling shaft structure for installation on a torsion spring winding cone, a gearbox assembly installed onto the coupling shaft structure and a sliding lever arm attached to the gearbox assembly and positioned against the inside of a garage door frame structure. The coupling shaft structure is comprised of two body halves fitted together by guiding pins and mating holes. Each body half has a winding hub portion. Each winding hub portion has two locking bolts hand tightened into winding bar slots on the winding cone. The gearbox assembly has a gearbox end cap that is pivotable into an open position. The gearbox end cap fits around the coupling shaft structure. The gearbox assembly is securable to the coupling shaft structure. A screw gun applies a rotational force to the gearbox assembly. Known tensioning tools are complicated to mount on the shaft of the counterbalancing mechanism and require a large number of operations to connect the tensioning tool to the torsion spring.

In order to address the above referenced issues a torque tensioning tool involving the use of different adapters for allowing service personnel to service different brands and types of door a new torque tool was developed. The torque tool is disclosed in WO 2022117574 Al.

The present inventors have however identified that the mounting of such adapters is cumbersome and makes the torque tool more complex to use as well as bulkier which may prevent tensioning of the torsion spring if there is limited room available next to the door. Furthermore, the present inventors have identified that a simplified process for mounting the tool to the counterbalancing mechanism is desirable.

Summary

According to an aspect, a torque transferring device for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning said torsion spring is provided.

The torque transferring device comprises a torque receiving part adapted to be connected to the tool to receive the torque.

The torque transferring device comprises an engaging arrangement adapted to engage the shaft of the counterbalancing mechanism. The engaging arrangement comprises one or more engaging member adapted to engage at least one corresponding engagement member of the shaft of the counterbalancing mechanism. The one or more engaging members comprises at least one movable engaging member. The at least one movable engaging member is movably connected to the torque receiving part.

The torque transferring device comprises a guiding arrangement. The guiding arrangement is adapted to interplay with the at least one movable engaging member such that rotation of the torque receiving part causes movement of the at least one engaging member for selectively engaging the at least one corresponding engagement member of the shaft. The guiding arrangement allows for the operator to secure the torque transferring device to the shaft of the counterbalancing mechanism without requiring any manual adjustments. Instead, the guiding arrangement will automatically cause the engaging arrangement to be secured to the shaft as soon as the torque receiving part is rotated. Thereby, a more user-friendly manner of tensioning the torsion spring is achieved.

According to an aspect, a torsion spring tensioning system is provided. The torsion spring tensioning system comprises a tool for tensioning a torsion spring of a counterbalancing mechanism of an overhead door and a torque transferring device for transferring torque from the tool to the spring of counterbalancing mechanism.

According to an aspect, a torque transferring device for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning said torsion spring is provided. The torque transferring device is adapted to be mounted to a shaft of the counterbalancing mechanism.

The torque transferring device comprises a torque receiving part adapted to be connected to the tool to receive the torque and an engaging arrangement adapted to engage the shaft of the counterbalancing mechanism. The engaging arrangement comprises one or more engaging member adapted to engage at least one corresponding engagement member of the shaft of the counterbalancing mechanism.

The torque receiving part comprises a tool interface adapted to be brought into engagement with a tool to receive the torque. The tool interface is adapted to be brought into engagement with a torque transfer interface of the tool.

The torque transfer interface has an accommodating shape for receiving the tool interface. The tool interface comprises a guiding portion having a guiding structure configured to slidably engage said accommodating shape to enable guided sliding relative movement between the torque transfer interface and the torque transfer interface.

The tool interface comprises an offset portion having an offset portion torque transferring structure configured to engage the accommodating shape to enable torque transfer from the torque transfer interface to the tool interface. The offset portion torque transferring structure is configured to engage the accommodating shape at an angular offset relative to the guiding structure. The angular offset of the offset portion prevents axial movement of the tool relative to the torque transferring device. This allows for a safer and more user-friendly tensioning process.

Embodiments of the invention are defined by the appended dependent claims and are further explained in the detailed description section as well as in the drawings.

It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps, or components, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. All terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, step, etc.]" are to be interpreted openly as referring to at least one instance of the element, device, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Brief description of drawings

Embodiments of the invention will be described in the following; reference being made appended drawings which illustrate non-limiting examples of how the inventive concept can be reduced into practice.

Figure la-b depicts a torque transferring device and a shaft according to one embodiment in a perspective view.

Figure 2 depicts a torque transferring device according to one embodiment in a perspective view.

Figure 3 depicts a torque transferring device according to one embodiment with the engaging arrangement removed in a perspective view. Figure 4 depicts a torque transferring device according to one embodiment with the engaging arrangement removed in a front view.

Figure 5a-b depicts a torque transferring device and components of a shaft according to one embodiment in a perspective view.

Figure 6 depicts a torque transferring device according to one embodiment in a perspective view.

Figure 7 depicts a torque transferring device according to one embodiment in a perspective view.

Figure 8 depicts a torque transferring device according to one embodiment in a perspective view.

Figure 9 depicts a torque transferring device according to one embodiment in a side view.

Figure 10 depicts a torque transferring device according to one embodiment in a side view.

Figure 11 depicts a torsion spring tensioning system according to one embodiment in a perspective view.

Figure 12 depicts a torque transferring according to one embodiment in a perspective view.

Figure 13 depicts aspects of a torsion spring tensioning system according to one embodiment in a perspective view.

Figure 14 depicts aspects of the torsion spring tensioning system of Figure 13 according to one embodiment in a perspective view.

Detailed description

A torque transferring device 600 for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door according to one embodiment is depicted in Figures la-b, Torque transferring devices 600 according to other embodiments are depicted in Figures 2-4, Figures 5-7 and Figures 8-10. A torsion spring tensioning system according to one embodiment is depicted in Figure 11.

Figure la-b depicts a torque transferring device 600 according to one embodiment. The torque transferring device 600 is suitable for, preferably adapted to, transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning said torsion spring. The torque transferring device 600 is adapted to be mounted to a shaft 1001 of the counterbalancing mechanism.

The torque transferring device 600 comprises a torque receiving part 610. The torque receiving part 610 is adapted to be connected to the tool to receive the torque.

The torque transferring device 600 comprises an engaging arrangement 32. The engaging arrangement 32 is adapted to engage the shaft 1001 of the counterbalancing mechanism. The engaging arrangement 32 comprises one or more engaging member 41. The one or more engaging members 41 is adapted to engage at least one corresponding engagement member 1004 of the shaft 1001 of the counterbalancing mechanism. The one or more engaging members 41 comprises at least one movable engaging member 43. The one or more movable engaging member 43 is movably connected to the torque receiving part 610.

The torque transferring device 600 comprises a guiding arrangement 650. The guiding arrangement 650 is adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part causes movement of the at least one engaging member 43 for engaging the at least one corresponding engagement member 1004 of the shaft 1001. In one embodiment, the guiding arrangement 650 is adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part 610 causes movement of the at least one engaging member 43 for selectively engaging the at least one corresponding engagement member 1004 of the shaft 1001.

Selectively engaging herein refers to that rotation of the torque receiving part 610 may cause the at least one movable engaging member 43 to engage or disengage the at least one corresponding engagement member 1004 of the shaft 1001. At least a first rotation direction may cause movement of the at least one movable engaging member such that the at least one movable engaging member 43 can engage the at least one corresponding engagement member 1004 of the shaft 1001. It may be envisioned that said movement may be enabled in both a first and second rotation direction, the second rotation direction being opposite to the first. It may further be envisioned that said movement only is enabled in said first rotation direction.

Worded differently, the guiding arrangement 650 may be adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part 610 causes movement of the at least one movable engaging member 43 for bringing the at least one movable engaging member 43 into engagement with the at least one corresponding engagement member 1004 of the shaft 1001. The aforementioned may apply to analogously to all of the embodiments described herein.

With the guiding arrangement 650 and the at least one movable engaging member 43, the torque transferring device 600 may be brought into secure engagement with the shaft 1001 only by means of mounting torque transferring device 600 to the shaft 1001 and rotation of the torque receiving part 610. Thereby, the torque transferring device 600 will be secured to the shaft 1001 simply by means of the tensioning rotation of the torque receiving part 610. This frees up one hand of the operator and enables tensioning of the torsion spring in tight spaces.

The guiding arrangement 650 is adapted to interplay such that relative rotation between the guiding arrangement 650 and the at least one movable engaging member 43 causes the guiding arrangement 650 to engage said at least one movable engaging member 43 thereby urging said movable engaging member 43 to move between a first and second position. As will be described further later on, the first and second position may correspond to an engaged and disengaged position relative to the corresponding engagement member(s) 1004, respectively.

The torque transferring device 600 may extend along an axis. The axis may be a rotation axis RA. Hence, the torque receiving part 610 may be adapted to rotate about said rotation axis RA. Rotation of the torque receiving part 610 about the rotation axis RA causes movement of the at least one movable engaging member 43. The rotation axis RA may be parallel and preferably coaxial with the shaft 1001 when the torque transferring device 600 is mounted to the shaft 1001.

Notably, each movable engaging member 43 may be adapted to engage a single corresponding engagement member 1004. Alternatively, each movable engaging member 43 may be adapted to engage a separate corresponding engagement member 1004. In one embodiment, wherein the engaging arrangement 32 comprises a plurality of movable engaging members 43, the shaft 1004 may comprise a plurality of corresponding engagement members 1004 whereby each movable engaging member 43 may be adapted to engage one of the plurality of corresponding engagement members 1004.

The torque receiving part 610 may be rotated by means of the aforementioned tool.

Advantageously, the guiding arrangement 650 may be adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part 610 causes movement of the at least one engaging member 43 for selectively engaging the at least one corresponding engagement member 1004 of the shaft 1001 when the torque transferring device 600 is mounted to the shaft 1001.

The relative movement and preferably relative rotation between the guiding arrangement 650 and the movable engaging member 43 and the interplay between said guiding arrangement 650 and the movable engaging member 43 prompts the movement of the at least one movable engaging member 43. As will be explained in further detail with reference to the accompanying drawings, the relative rotation may be achieved by means of the torque receiving part 610 rotating the guiding arrangement 650 and/or the at least one movable engaging member 43.

Advantageously, the relative rotation between the guiding arrangement 650 and the at least one movable engaging member 43 may be relative rotation about the rotation axis RA.

The at least one movable engaging member 43 may be adapted to move between an engaged positon and a disengaged position relative to the corresponding engagement member. Accordingly, the at least one movable engaging member 43 may be adapted to be movable between the engaged position and the disengaged position.

Hence, the guiding arrangement 650 may be adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part 610 causes movement of the at least one movable engaging member 43 between the engaged position and the disengaged position. Preferably, the guiding arrangement 650 may be adapted to interplay with the at least one movable engaging member 43 such that rotation of the torque receiving part 610 causes movement of the at least one movable engaging member 43 between the engaged position and the disengaged position when the torque transferring device 600 is mounted to the shaft 1001.

Referencing Figure la-b, torque transferring device 600 is mounted to the shaft of the counterbalancing mechanism. Thus, the engaging arrangement 32 may be connected to the torsion spring of the counterbalancing mechanism. This is performed by means of the engaging arrangement 32 being connected to the shaft 1001 of the counterbalancing mechanism which in turn is connected to said torsion spring. The engaging arrangement 32 may be connected to the winding cone 1002, which may be connected to the torsion spring. The winding cone 1002 may be formed as a part of the shaft 1001 of the counterbalancing mechanism.

The one or more engaging members 41 may engage the corresponding engagement members 1004 of the shaft 1001 of the counterbalancing mechanism.

In order to achieve a more space-efficient torque transferring device 600, the movable engaging member(s) 43 may be adapted to engage the corresponding engagement member(s) 1004 in a radial direction.

The one or more movable engaging member 43 may comprise an engaging portion 433. The engaging portion 433 may be adapted to engage the corresponding engagement member 1004 of the shaft 1001. The engaging portion 433 may be adapted to extend in a radial direction relative the shaft 1001 at least in the engaged position.

The above mentioned radial direction may be a radial direction relative to the shaft 1001 and/or the rotation axis RA. Accordingly, the engaging portion 433 may extend substantially orthogonally to the rotation axis RA and/or the shaft 1001.

Preferably, the engaging portion 433 may extend in a radial inward direction. It may however be envisioned that the engaging portion 433 may extend in a radial outward direction depending on the design of the shaft 1001 and the corresponding engagement members 1004.

The one or more engaging members 41 may be radially connected to the torsion spring. The one or more engaging members 41 may be radially connected to the winding cone 1002. The winding cone 1002 is connected to the torsion spring and forms a part of the shaft 1001 of the counterbalancing mechanism. The one or more engaging members 41 may be in engagement with at least one of the corresponding engagement members 1004. The winding cone 1002 may comprise the corresponding engagement members 1004 of the shaft 1001 of the counterbalancing mechanism. The corresponding engagement members 1004 may be holes. Preferably, the corresponding engagement members 1004 may be radial holes. In an alternative embodiment, the corresponding engagement members 1004 may be splines, for example axially extending splines extending substantially parallel to the rotation axis RA.

Accordingly, the one or more engaging members 41 may be radially insertable into the corresponding engagement members (radial holes) in the winding cone. A winding cone usually comprises several radial holes, commonly four radial holes. The one or more engaging members 41 may be radially insertable in at least a plurality of the radial holes of the winding cone. In operation, the one or more engaging member 41 transmits a rotational movement from the gear wheel 21 to the torsion spring.

In an alternative embodiment, the corresponding engagement members 1004 may be splines, for example axially extending splines extending substantially parallel to the rotation axis RA.

In Figure la, the at least one movable engaging member 43 is in the disengaged position relative the corresponding engagement member 1004. Hence, the at least one movable engaging member 43 is disengaged relative the corresponding engagement member 1004 such that the movable engaging member 43 is prevented from transferring torque to the corresponding engagement member 1004. In the depicted example, the corresponding engagement members 1004 are in the form of holes. Hence, in the disengaged positon, the movable engaging member(s) 43 are not positioned inside said holes.

In Figure lb, the torque receiving part 610 has been rotated, e.g. rotated about the rotation axis RA, causing the at least one movable engaging member 43 to move to the engaged position relative the corresponding engagement member 1004, i.e. into engagement with the corresponding engagement member 1004. Hence, the at least one movable engaging member 43 is engaged relative the corresponding engagement member 1004 such that the movable engaging member 43 enables transfer of torque to the corresponding engagement member 1004. In the depicted example, the corresponding engagement members 1004 are in the form of holes. Hence, in the engaged positon, the movable engaging member(s) 43 or at least a portion of the movable engaging member(s) is positioned in said hole.

The guiding arrangement 650 may comprise a cam structure 615. The cam structure 615 may be adapted to interplay with the at least one movable engaging member 43. Relative rotation between the at least one movable engaging member 43 and the cam structure 615 causes the movement of the at least one movable engaging member 43. Hence, rotation of the cam structure 615 or the at least one movable engaging member 43 relative to the other of the cam structure 615 and the at least one movable engaging member 43 causes the movement of the at least one movable engaging member 43.

The engaging arrangement may comprise a mounting part 439. The mounting part 439 may be connected to the torque receiving part 610. The at least one movable engaging member 43 may be movably mounted to the mounting part 439 thereby movably connecting the at least one movable engaging member 43 and the torque receiving part 610.

The at least one movable engaging member 43 may accordingly be movable relative the mounting part 439. The guiding arrangement 650 and advantageously the cam structure 615 may be adapted to cause the at least one movable engaging member 43 to move relative to the mounting part 439.

The at least one movable engaging member 43 may be considered movable relative to the mounting part 439 between a first and second position. The first and second position may correspond to an engaged and disengaged position relative to the corresponding engagement member 1004 of the shaft 1001, respectively.

The mounting part 439 may connect the at least one movable engaging member 43 with the torque receiving part 610. Advantageously, the mounting part 439 may connect the engaging members 41 with the torque receiving part 610. Preferably, the mounting part 439 may connect each of the engaging members 41 and preferably each of the at least one movable engaging members 43 with the torque receiving part 610. The mounting part 439 may be fixed or movable relative the torque receiving part 610. In the depicted embodiment, the mounting part 439 is fix relative to the torque receiving part 610. According to such an embodiment, the torque receiving part 610 and the mounting part 439 may be formed in one piece. Alternatively, the torque receiving part 610 and the mounting part 439 may be in the form of two separate members fixedly connected to each other.

In the embodiment depicted in Figures la-b, the relative rotation is achieved by means of the torque receiving part 610 rotating the cam structure 615. As will be described with reference to Figures 5-11 it may also be achieved by means of the torque receiving part 610 rotating the at least one movable engaging member 43.

Further referencing Figure la-b, the guiding arrangement 650 is adapted to cause the at least one movable engaging member 43 to pivot between the engaged position and the disengaged position.

Referencing Figure la-b, the at least one movable engaging member 43 may be pivotable to an engaged position.

In the engaged position, the at least one movable engaging member 43 may extend in an axial direction parallel to the rotation axis RA and/or the shaft 1001. In the disengaged position, the at least one movable engaging member 43 may extend in a radial direction substantially orthogonal to the rotation axis RA and/or the shaft 1001. The engaging portion 433 may form an orthogonal protrusion of the at least one movable engaging member 43.

In the engaged position, the engaging portion 433 may extend in a radial direction relative to the shaft 1001 and/or the rotation axis RA. In the disengaged position, the engaging portion 433 may extend in a direction substantially parallel to the shaft 1001 and/or the rotation axis RA.

The rotation of the torque receiving part 610 causes the at least one movable engaging member 43 to pivot about an axis extending in a radial direction. The radial direction may be considered a radial direction relative to the shaft 1001 and/or a direction extending orthogonally to the rotation axis RA.

In the depicted embodiment, the guiding arrangement 650 may comprise the cam structure 615. The cam structure 615 may be fixed relative to the torque receiving part 610. The rotation of the cam structure 615 causes the movement of the at least one movable engaging member 43. Accordingly, the rotation of the cam structure 615 causes the movement of the at least one movable engaging member 43 between the engaged and disengaged position. The cam structure 615 may be adapted to interplay with the at least one movable engaging member 43 such that rotation of the cam structure 615 causes the movement of the at least one movable engaging member 43. The movement may be considered the movement between the engaged position and the disengaged position.

In the depicted embodiment, the guiding arrangement 650 may be fix relative to the torque receiving part 610. The mounting part 439 may be rotatably connected to the torque receiving part 610. Accordingly, the cam structure 615 may be fix relative to the torque receiving part 610 while the mounting part 439 may be rotatable relative the torque receiving part 610 and the guiding arrangement 650.

Further referencing Figure la-b, the cam structure 615 may be adapted to convert the rotational movement of the torque receiving part 610 to radial movement of the one or more movable engaging members 43. Accordingly, the rotation of the cam structure 615 causes translational movement in the form of radial movement of the one or more movable engaging member 43.

Notably, the movable engaging member(s) and guiding arrangement may be designed in multiple ways in order to achieve the desired function. In the depicted embodiment, the one or more movable engaging member 43 is pivotable between the engaged and disengaged position relative to the corresponding engagement member 1004.

The one or more movable engaging member 43 may be pivotable relative to the torque receiving part 610. Rotation of the cam structure 615 may cause the cam structure 615 to engage the one or more movable engaging member 43 thereby urging the movement of the at least one movable engaging member 43, e.g. the movement between the engaged and disengaged position.

The movable engaging member 43 may comprise a cam portion 431. The cam portion 431 may be adapted to be engaged by the cam structure 615. The movable engaging member 43 may further comprise an intermediate portion 432. The intermediate portion may be disposed between the cam portion 431 and the engaging portion 433. The intermediate portion 432 may comprise a pivot point 470 for the pivoting movement 470.

In one embodiment, the movable engaging member 43 may be pivotably mounted to mounting part 439 at the pivot point 470. The movable engaging member 43 may be connected to the mounting part 439 by means of a pivot pin. Accordingly, the one or more movable engaging member 43 may be pivotable relative to the torque receiving part 610 by means of being pivotably connected to the mounting part 439.

The pivot point 470 may be adapted to provide pivoting of the movable engaging member 43 about an axis extending substantially orthogonally to the shaft 1001 when the torque transferring device 600 is mounted to the shaft 1001. Expressed differently, the axis may extend substantially orthogonally to the rotational axis of the cam structure 615.

As depicted in Figure la-b, the torque receiving part 610 may comprise a tool interface 611. The tool interface 611 is adapted to be brought into engagement with a tool to receive the torque.

In the depicted embodiment, the tool receiving part 610 is adapted to be connected to a torsion spring tensioning tool 100.

In the depicted embodiment, the tool interface 611 is in the form of a nut. The tool interface 611 may thus be adapted to be rotated by means of a wrench tool. Thereby, the tool receiving part 610 is rotated and the torque is transferred to the torsion spring via the torque transferring device 600. In one embodiment, the torsion spring tensioning tool 100 may function as a wrench tool.

The tool interface 611 may be adapted to be brought into engagement with a torque transfer interface 145 of a tool, preferably the torsion spring tensioning tool 100. The torque transfer interface 145 may comprise engaging means 146 adapted to engage the tool interface 611 to enable torque transfer to the torque receiving part 610.

The engaging means 146 of the torque transfer interface 145 may comprise a recess with a shape corresponding to the shape of the tool interface 611. In the depicted embodiment, the shape of the recess corresponds to the shape of the nut. As will be described in further detail with reference to Figure 11, the torque transfer interface 145 may be connected to a drivable member of the torsion spring tensioning tool 100. Thereby, the torque transmitted to the drivable member is transmitted to the torque transfer interface 145 and then to the torque receiving part 610.

In the depicted embodiment, the torque transfer interface 145 comprises a plate member mounted to a drivable member of the torsion spring tensioning tool 100.

It may however be envisioned that the tool interface 611 may be adapted to other types of tools. It may further be envisioned that the torque transferring device 610 comprises a plurality of interfaces for engagement/connection to a plurality of tools.

Advantageously, the engaging arrangement 32 comprises a plurality of engaging members 41. Thereby, the engagement between the torque transferring device 600 and the shaft 1001 becomes more stable and robust.

Preferably, the engaging arrangement 32 comprises one or more fixed engaging member. The at least one engaging member 51 may comprise said one or more fixed engaging member. The one or more fixed engaging member may be adapted to be fixed relative the mounting part 439. The one or more fixed engaging member may function as a guide for the engagement between the shaft 1001 and the torque transferring device 600. The one or more fixed engaging member(s) may be fixed to mounting part 439. The one or more fixed engaging member(s) may be fixedly mounted to the mounting part 439. Accordingly, the engaging arrangement 32 may comprise at least one movable engaging member 43 and at least one fixed engaging member. The at least one engaging member 41 may thus comprise at least one movable engaging member 43 and at least one fixed engaging member. Thus, the engaging arrangement 32 may comprise a plurality of engaging members 41 including both fixed and movable engaging members.

Upon mounting of the torque transferring device 600 to the shaft 1001, the one or more fixed engaging members may be brought into engagement with one or more corresponding engagement members 1004 of the shaft 1001. When the torque receiving part 610 is rotated, the one or more movable engaging members 43 are brought into engagement with their corresponding engagement members 1004 of the shaft 1001. Figures 2-4 depicts an embodiment of a torque transferring device 600. The torque transferring device 600 comprises the same guiding arrangement 650 and engaging arrangement 32 as the embodiment of Figures la-b.

The torque transferring device 600 may further include a shaft aperture 699 for receiving the shaft. The engaging arrangement 32 may be arranged such that the engagement interface associated with the shaft, e.g. the corresponding engagement member(s) of the shaft, engages the engaging arrangement upon the shaft being received in said shaft aperture 699. The shaft aperture 699 may extend in a radial direction relative the torque receiving part 610. The torque receiving part 610 may be adapted to extend along the shaft of the counterbalancing mechanism. The shaft aperture 699 may be in the form of a recess extending along the torque receiving part 610. Preferably, the shaft aperture 699 may comprise a rounded end portion adapted to accommodate the shaft. In one embodiment, the shaft aperture 699 may extend along the rotation axis RA.

The one or more engaging members 41 of the engaging arrangement may be arranged to face the center of the shaft aperture 699. The one or more engaging members 41 may thus be arranged to engage the corresponding engagement member(s) when the shaft is received in the shaft aperture 699.

Preferably, the one or more engaging member 41 may comprise a pin 434. In one embodiment, the engaging portion 433 of the one or more movable engaging member 43 may comprise the pin 434. The pin 434 may extend radially. The pin 434 may extend substantially orthogonally to the rotation axis RA.

Notably, a pin is only one of the options available for the skilled person. It may for example be envisioned that the movable engaging member comprises a hole or recess adapted to engage a corresponding engagement member of the shaft in the form of a protrusion.

The one or more engaging members 41 may be adapted to arrange the torque receiving part 610 remote from the torsion spring. The one or more engaging members 41 may also be adapted to arrange the torque receiving part 610 remote from the winding cone of the torsion spring. Worded differently, the one or more engaging members 41 are arranged to provide a distance along the rotation axis RA between the torque receiving part 610 and the corresponding engagement members 1004 of the shaft 1001.

Thereby, the torque receiving part 610 as well as the tool connected to the torque receiving part 610 may be arranged remote from the torsion spring such that there is a distance between the torque receiving part 610 and the torsion spring as well as the winding cone. The distance between the torque receiving part 610 and the torsion spring as well as the winding cone enables mounting of a key on the shaft. The key rotationally locks the winding cone on the shaft. The key may be insertable into a key groove formed in the shaft of the counterbalancing mechanism and a key groove formed in the winding cone.

In one embodiment, the one or more engaging members 41 may comprise a distance member 34 such that the one or more engaging members 41 are arranged remote from the torque receiving part 610. The one or more distance members 34 may extend axially from the torque receiving part 610 at least when the movable engaging members 43 is in the engaged position. The engaging portion 433 may extend radially from the respective distance member 34.

In the depicted embodiment, the torque transferring device 600 is adapted to be fixated to a tool. The torque receiving part 610 may comprise a fixating arrangement 670. The fixating arrangement 670 may be adapted to be fixated to a tool to receive the torque.

The fixating arrangement 670 may be adapted to be fixated to a torsion spring tensioning tool. In one embodiment, the fixating arrangement 670 may be adapted to be fixated to a gear wheel 21 of the torsion spring tensioning tool.

Figure 3-4 depicts the torque transferring device 600 with the engaging arrangement removed. As depicted, the cam structure 615 is in the form of a cam wheel. The cam wheel has an axial surface provided with elevated portions 6152 and sunken portions 6151. The cam wheel may extend substantially orthogonally to the rotational axis RA.

As the cam structure 615, e.g. cam wheel, rotates, the cam portion 431 of the movable engaging member 43 will move due to it engaging the cam wheel and the uneven curvature of the cam wheel. If the cam portion 431 engages a sunken portion 6151, the engaging portion 433 will move out of engagement with the corresponding engagement member due to the cam portion 431 tipping in the opposite direction. If the cam portion 431 engages an elevated portion 6151, the engaging portion 433 will move into engagement with the corresponding engagement member due to the cam portion 431 tipping in the opposite direction.

The guiding arrangement 650 may be adapted to retain the one or more movable engaging members 43 in the engaged position upon further relative rotation between the guiding arrangement 650 and the engaging arrangement 32.

In one embodiment, the cam structure 615 may be adapted to only enable rotation of the mounting part 439 between a first and second set position relative to cam structure 615. In the depicted embodiment, the first and second set position may correspond to the one or more movable engaging member 43 being in the engaged position. An intermediate set position relative the torque receiving part 610 may correspond to the one or more movable engaging member 43 being in the disengaged position.

Hence, the mounting part 439 may be rotatable relative to the cam structure 615, e.g. the cam wheel, in two opposite directions towards the first and second set position, respectively. Accordingly, any rotation from the intermediate set position causes the one or more movable engaging member 43 to move from the disengaged position to the engaged position.

In the intermediate set position, the cam portion 431 may engage the elevated portion 6152. In the first and second set position may engage a corresponding sunken portion 6151. Advantageously, the sunken portion 6151 may be adapted to retain the cam portion 431 to prevent further relative rotation between the mounting part 439 and the cam structure 615. Accordingly, the sunken portion 6151 may be formed such as to form a blocking protrusion for relative rotation beyond the first or second set position.

In the depicted embodiment, a first sunken portion may form a blocking protrusion for relative rotation beyond the first set position and a second sunken portion may form a blocking protrusion for relative rotation beyond the second set position.

The fixating arrangement 670 may be adapted to be fixated to the tool by means of one or more fastening elements 671. The fixating arrangement 670 may comprise one or more holes for received said fastening elements 671. In the depicted embodiment, the torque receiving part 610 is provided with the holes.

The torque receiving part 610 may comprise a shaft portion 698. The shaft portion 698 may extend along the rotation axis RA.

In the depicted embodiment, the cam structure 615 is fixed to the shaft portion 698. Accordingly, the cam wheel may be fixed to the shaft portion 698.

In the depicted embodiment, the cam structure 615, e.g. the cam wheel, is fixed to the shaft portion 698 by means of retention means preventing relative rotation and relative radial movement between the cam structure 615 and the shaft portion 698. The retention means may be in the form of an outer surface of the shaft portion 698 engaging with the inner surface of the cam structure 615. It may however be envisioned that the cam structure 615 is fixed to shaft portion 698 by means of one or more fastening elements.

The engaging arrangement 32 may be rotatably mounted to the shaft portion 698. The mounting part 439 may be rotatably mounted to said shaft portion 698.

In the depicted embodiment, the shaft portion 698 is inserted through an aperture of the mounting part 439. The mounting part 439 may be able to rotatably slide relative to the shaft portion 698.

Figure 5a-b depicts a torque transferring device 600 according to one embodiment. The torque transferring device 600 comprises a guiding arrangement 650 according to an alternative embodiment.

In the depicted embodiment, the mounting part 439 is fixedly connected to the torque receiving part 610. The mounting part 439 is rotatable relative to the guiding arrangement 650. In the depicted embodiment, the guiding arrangement 650, preferably the cam structure 615, is rotatable relative to torque receiving part 610. The rotation of the cam structure 615 causes the movement of the at least one movable engaging member 43. Accordingly, the cam structure 615 may rotate relative to the torque receiving part 610 thereby urging the movement of the at least one movable engaging member 43.

In Figure 5a, the at least one movable engaging member 43 is in the disengaged position relative the corresponding engagement member 1004. Hence, the at least one movable engaging member 43 is disengaged relative the corresponding engagement member 1004 such that the movable engaging member 43 is prevented from transferring torque to the corresponding engagement member 1004. In the depicted example, the corresponding engagement members 1004 are in the form of holes. Hence, in the disengaged positon, the movable engaging member(s) 43 are not positioned inside said holes.

In Figure 5b, the shaft has been rotated causing the at least one movable engaging member 43 to move to the engaged position relative the corresponding engagement member 1004, i.e. into engagement with the corresponding engagement member 1004. Hence, the at least one movable engaging member 43 is in the engaged position relative to the corresponding engagement member 1004 such that the movable engaging member 43 enables transfer of torque to the corresponding engagement member 1004. In the depicted example, the corresponding engagement members 1004 are in the form of holes. Hence, in the engaged positon, the movable engaging member(s) 43 or at least a portion of the movable engaging member(s) is positioned in said hole.

As depicted in Figures 5a-b, the guiding arrangement 650 may accommodate connection to different types and sizes of shafts (and winding cones).

The cam structure 615 may comprise one or more radially extending tracks 619. Each of the at least one movable engaging member 43 may be slidably mounted in one of the tracks of the one or more radially extending tracks 619.

The radially extending tracks 619 may extend substantially orthogonally to the rotation axis RA and/or the shaft 1001.

The radially extending tracks allows for a torque transferring device 600 easily adaptable to shafts 1001 and in particular winding cones 1002 of different sizes. Figures 6-7 depicts the torque transferring device 600 of Figures 5a-b in further detail.

The mounting part 439 may be fixedly mounted to the shaft portion 698 of the torque receiving part 610. The guiding arrangement 650, e.g. the cam structure 615, may be rotatably mounted to the shaft portion 698.

The cam structure 615 may, as will be described later on, be provided on a guide plate 613. The guide plate 613 may be rotatably mounted to the shaft portion 698. The shaft portion 613 may be inserted in a corresponding aperture of the guide plate 613. The cam structure 615, e.g. the guide plate 613 may be able to rotatably slide relative to the shaft portion 698.

In the depicted embodiment, the mounting part 439 is fixed to the shaft portion 698 by means of retention means at least preventing relative rotation and relative radial movement between the mounting part 439 and the shaft portion 698.

The guiding arrangement 650 may further comprise one or more pivotable guiding arms 617. Each pivotable guiding arm 617 may be pivotably mounted to one of the at least one movable engaging members 43 and the mounting part 439 thereby movably connecting the movable engaging member 43 and the torque receiving part 610.

In the depicted embodiment, the mounting part 439 may be fixed to the shaft portion 698 by means of retention means comprising the pivot connections connecting the guiding arms 617 and the movable engaging members 43.

As aforementioned, the guiding arrangement 650 may comprise a guide plate 613. The guide plate 613 may be provided with the one or more radially extending tracks 619. The guide plate 613 may be fix relative to the torque receiving part 610.

Hence, a portion of the at least one movable engaging member 43 may be mounted to a pivotable guiding arm 617 and another portion of said at least one movable engaging member 43 may be slidably arranged in a radially extending track 619.

The at least one movable engaging member 43 may comprise a guided portion 6112. The guided portion 6112 is slidably mounted in a radially extending track 619. As the torque receiving part 610 rotates, the pivotable guiding arm 617 will drag the guided portion 6112 along the radially extending track 619. As the rotation starts, the guided portion 6112 and accordingly the movable engaging member 43 will move radially inwardly along the radially extending track 619. Thereby, the movable engaging member 43 may move to selectively engage the corresponding engagement member of the shaft, i.e. between the engaged and disengaged position.

Similar to the previously described embodiments, the guiding arrangement 650 may be adapted to retain the one or more movable engaging members 43 in the engaged position upon relative rotation between the guiding arrangement 650 and the engaging arrangement 32.

The radially extending track(s) 619 may be adapted to delimit the inward radial movement of the movable engaging member(s) 43 at a first set position of the movable engaging member(s) relative to the guide arrangement 650. The first set position may correspond to the engaged position of the movable engaging member 43. The first set position may be formed by an inner end portion of the radially extending track 619. Upon relative rotation between the guide plate 613 and the mounting part 439, the movable engaging member(s) 43 slides radially inwards towards the first set position. Once the first set position is reached, the one or more movable engaging members 43 are secured in their engaged position due to the relative rotation retaining the movable engaging member(s) 43 at the inner end portion of the radially extending track 439.

Notably, this will occur regardless of the direction of the relative rotation between the guide plate 613 and the mounting part 439. Once the one or more movable engaging members 43 are in the first set position, relative rotation in the opposite direction may cause the movable engaging member 43 to move along the radially extending track 619 outwardly and away from the first set position. Thereby, the one or more movable engaging members 43 may be moved to the disengaged position.

The embodiments depicted in Figures 5-7 comprises a torque receiving part 610 comprising a tool interface 611 adapted to be brought into engagement with a tool to receive the torque. Figures 8-10 depicts an embodiment of a torque transferring device 600. The torque transferring device 600 comprises the same guiding arrangement 650 as the embodiment of Figures 5-7. In the depicted embodiment, the torque transferring device 600 is adapted to be fixated to a tool. The torque receiving part 610 may comprise a fixating arrangement 670. The fixating arrangement 670 may be adapted to be fixated to a tool to receive the torque.

The fixating arrangement 670 may be adapted to fixated to the tool by means of one or more fastening elements 671.

Figure 11 depicts a torsion spring tensioning tool adapted to be connected to the torque transferring device 600 according to one embodiment. In the depicted example, the torque transferring device 600 is a torque transferring device 600 according to the embodiment depicted in Figures 8-10. The embodiments depicted in Figures 1-7 may also be rotated by means of the torsion spring tensioning tool.

The torque transferring device 600 is adapted to engage the shaft of the counterbalancing mechanism and transmit a rotational movement from the gear wheel 21 to the torsion spring of the counterbalancing mechanism. In one embodiment, the engaging arrangement 32 may be adapted to engage a corresponding engagement interface of the shaft. The engaging arrangement 32 may be adapted to transmit a rotational movement from the gear wheel 21 to the torsion spring of the counterbalancing mechanism. The rotational movement accordingly provides a tensioning torque for the torsion spring.

The torsion spring tensioning tool 100 comprises a housing 80 and a gear wheel arrangement 20. The gear wheel arrangement 20 is adapted to be mounted on a shaft of the counterbalancing mechanism.

The gear wheel arrangement 20 comprises the gear wheel 21. The gear wheel 21 is rotatably arranged in the housing 80.

The torsion spring tensioning tool 100 further comprises a gear mechanism 54. The gear mechanism 54 is coupled to the gear wheel 21 for rotating said gear wheel 21. The gear mechanism allows for tensioning of the torsion spring in a simple manner by rotation of the gear mechanism. Thus, a more safe and user friendly tensioning may be achieved.

The gear mechanism 54 may rotate the gear wheel 21 during operation of the tensioning tool 100. Since the engaging arrangement 32 is connected to the gear wheel 21 and the engaging arrangement 32 in operation is connected to the torsion spring of the counterbalancing mechanism and transmits a rotational movement from the gear wheel 21 to the torsion spring, the torsion spring is wound when the gear wheel 21 is rotated. Depending on the direction of the rotation of the gear wheel 21, the torsion spring is either wound up and thereby tensioned or unwound and thereby relaxed, the latter implying that the tension of the torsion spring is reduced.

The gear mechanism 54 provides rotational support to the gear wheel 21, whereby a more robust tensioning tool is achieved. Further, a safer tensioning is achieved due to the tool being less susceptible to the large torque exerted to the tool by the torsion spring.

Referencing Figure 11, the gear mechanism 54 may comprise a torque receiving arrangement 250. The torque receiving arrangement 250 may comprise a drivable member 208. The drivable member 208 may be adapted to be brought into engagement with a driving member of a powered torque tool for transfer of torque to the gear wheel 21.

Thus, the driving member rotates the drivable member 208. The drivable member 208 rotates the gear wheel 21 (preferably via other gears of the gear mechanism). The gear wheel arrangement 20 with the gear wheel 21 is connected to the torsion spring by means of the torque transferring device 600. Thereby, the torsion spring is tensioned by the powered torque tool.

The powered torque tool may be any type of powered torque tool suitable for providing a controlled torque to the torsion spring tensioning tool. In one embodiment, the powered torque tool may be a powered ratchet wrench. In another embodiment, the powered torque tool may be a screw gun or a drilling machine. The driving member may be a rotatable member of the powered torque tool adapted to transfer the torque from a drive unit of the powered torque tool to an external part such as the drivable member 208 of the torsion spring tensioning tool 100.

Advantageously, the gear mechanism 54 may comprise a plurality of cogged wheels engaging the gear wheel 21. The plurality of cogged wheels provides additional support for the gear wheel even when the gear wheel is subjected to a large torque. This is particularly advantageous due to the large torques present in the counterbalancing mechanism.

The gear mechanism 54 may be adapted to be rotated by the powered torque tool. The gear mechanism 54 is thus connectable to the powered torque tool by means of the torque receiving arrangement 250. The drivable member 208 is thus connectable to the powered torque tool.

The torque receiving arrangement may be provided as a worm gear mechanism. Accordingly, the drivable member 208 may be connected to a worm gear shaft. The worm gear mechanism allows for a more cost-efficient manner of transferring torque to the gear wheel without sacrificing performance.

The plurality of cogged wheels may be in engagement with the gear wheel 21 for providing rotational support for said gear wheel 21 and transferring torque to the gear wheel 21. The plurality of cogged wheels may be rotatably coupled to the housing 80 and the gear wheel 21 to function as a reduction gearing. Accordingly, the plurality of cogged wheels may be considered a reduction gearing.

The plurality of cogged wheels may be rotatably arranged in the housing 80.

The gear wheel 21 comprises teeth along the circumference of said gear wheel 21. Said teeth extends radially outwards from a center of the gear wheel 21. Said teeth may extend radially outwards from a rotational axis of said gear wheel 21. In one embodiment, the gear wheel 21 may comprise a gear rim. The gear rim is arranged along the circumference of the gear wheel. The gear rim may comprise the teeth. The term gear rim herein refers to a toothed surface. The toothed surface consequently forms the engagement interface of a gear. Preferably, the gear wheel 21 is formed as a partial ring gear wheel, i.e. a section of a full ring gear wheel. Thus, the gear wheel 21 may be a non-continuous ring gear wheel provided with an opening along the gear rim.

In one embodiment, the gear wheel 21 is formed as a partial ring wheel and the housing 80 has an open end such that the engaging arrangement 32 can be brought into engagement with the shaft, from a direction extending orthogonally to the shaft, e.g. in the same plane as the gear wheel 21. The housing 80 may have an open end such that the gear wheel 21 protrudes out of said housing 80 to accommodate for mounting of the gear wheel arrangement 20 to the shaft of the counterbalancing mechanism.

The gear wheel 21 may further include an aperture for receiving the shaft. The engaging arrangement 32 may be arranged such that the engagement interface associated with the shaft engages the engaging arrangement upon the shaft being received in said aperture. The aperture may extend in a radial direction relative the gear wheel 21. The aperture may be in the form of a recess extending through a portion of the gear wheel 21. Preferably, the aperture may comprise a rounded end portion adapted to accommodate the shaft. Preferably, the aperture may coincide with the shaft aperture of the torque transferring device 610 when said torque transferring device 610 is connected to the tool.

Advantageously, the gear wheel 21 may be arranged such that the aperture is accessible outside of the housing 80. Thus, the aperture may be arranged outside said housing 80.

The gear wheel 21 and the housing 80 may be adapted such that the engaging arrangement 32 can be brought into engagement with the shaft from a direction extending orthogonally to the shaft.

With the ring wheel shape, the engaging arrangement can be brought into engagement with the shaft in a direction orthogonal to the shaft allowing use of the tool even for doors arranged in tight spaces.

As aforementioned, the torsion spring tensioning tool 100 comprises a housing 80. The gear wheel 21 is rotatably arranged in the housing 80.

The gear wheel 21 may comprise a gear flange 83. The gear flange 83 comprises may comprise a first lip 84 arranged on one axial side of the gear wheel 21 to form an axially facing outer surface of the gear wheel 21. The gear flange 83 may comprise a second lip 85 arranged on the other axial side of the gear wheel 21 to form an axially facing outer surface of the gear wheel. The gear flange 83 may be curved. The gear flange 83 may extend along the outer circumference of the gear wheel 21.

The flange 83 may comprise a first and second curved lip mounted axially extending protrusion on opposite sides of the gear wheel 21.

The one or more engaging members 41 including the at least one movable engaging member 43 may at least in the engaged position extend axially from the torsion spring tensioning tool 100.

The torsion spring tensioning tool may further comprise a handle 75. The handle facilitates mounting of the torsion spring tensioning tool on the shaft of the counterbalancing mechanism and operation of the torsion spring tensioning tool since the housing can easily be moved by hand during mounting and easily be kept in position by hand during operation. The handle 75 is coupled to the housing 80. The handle 75 comprises an elongated handle element.

In one embodiment, the torsion spring tensioning tool may comprise the torque transfer interface 145 as referenced in connection with Figure la-b. According to such an embodiment, the torque transfer interface 145 may be connected to the gear wheel 21. In one embodiment, the torque transfer interface 145 may be fixedly mounted to said gear wheel 21.

It may be envisioned that the torsion spring tensioning tool 100 comprises both the torque transfer interface 145 for engaging the tool interface 611 and means to fixate the fixating arrangement 670 of the torque receiving part 610.

A counterbalancing mechanism is usually used in overhead sectional doors. Thus, the overhead door may be an overhead sectional door.

The mounting, operation and removal of the torsion spring tensioning tool 100 and the torque transferring device 600 according to one embodiment is hereinafter described.

The tensioning tool 100 and torque transferring device 600 may be mounted on a shaft of a counterbalancing mechanism and connected to a torsion spring in the following way. The engaging arrangement 32 is brought into alignment with the corresponding engagement interface of the shaft 1001 of the overhead door, thereby engaging the winding cone of the counterbalancing mechanism. Accordingly, the one or more engagement members 41 are aligned with the one or more corresponding engagement members 1004 of the shaft 1001.

In one embodiment, wherein the torque transferring device 600 is fixated to the tool 100, the tool 100 together with the torque transferring device 600 is aligned with the shaft 1001. In one embodiment, wherein the torque transferring device 600 is adapted to be engaged by the tool 100, the torque transferring device 600 is mounted to the shaft 1001 and then engaged by the tool 100.

The engaging arrangement 32 and in particular the one or more engaging members 41 are brought into engagement with the corresponding engagement members 1004 of the shaft 1001. Any fixed engagement member may be brought into engagement first.

The torsion spring tensioning tool 100 may be operated to tension the torsion spring of the counterbalancing mechanism in the following way. A powered torque tool is connected to the torque receiving arrangement 250, e.g. the drivable member 208 of the torque receiving arrangement 250 such that rotation of the driving member 404 of the powered torque tool 400 rotates the drivable member 208. The gripping arrangement 300 may be operated to engage the shaft of the counterbalancing mechanism, thereby gripping the shaft. This may be performed by means of operating the actuatable mechanism 311 to enable separation between the first and second gripping member 301, 302.

The rotation of the drivable member 208 causes rotation of the plurality of cogged wheels 51, 52 of the gear mechanism 54 in turn rotating the gear wheel 21. The plurality of cogged wheels 51, 52 may rotate the gear wheel 21 at an even lower rotational speed and the transferred torque is even higher. The rotation of the gear wheel 21 is transferred to the torque receiving part 610 of the torque transferring device 600. The rotation of the torque receiving part 610 causes the at least one movable engagement member 43 to be brought into engagement with the one or more corresponding engagement member 1004 of the shaft 1001. Upon the engaging arrangement 32 engaging the shaft 1001, the rotation of the gear wheel 21 is transferred to the winding cone via the engaging arrangement 32. Thereby, the torsion spring is wound. To tension the torsion spring, the direction of rotation of the driving member of the powered torque tool is chosen such that the torsion spring is wound up. It is easily realized that the tensioning tool can be used to relax the tension of the torsion spring by operating the driving member of the powered torque tool in the opposite direction.

When suitable tension of the torsion spring has been achieved, the winding cone is rotationally locked to the shaft of the counterbalancing mechanism by tightening of tightening screws arranged in the winding cone and engaging the shaft and/or by inserting a key in a key groove formed in the shaft and the winding cone.

Figure 12 shows a torque transferring device according to another embodiment. In accordance with the previously described embodiments, the torque transferring device 600 comprises the torque receiving part 610 adapted to be connected to the tool to receive the torque. The torque transferring 600 further comprises the engaging arrangement 32 comprising the one or more engaging member 41.

In the depicted example, movable engaging members 43 and a guiding arrangement 650 in accordance with the previously described embodiments are utilized, but it may be envisioned that only fixed engaging members used. Thus, the guiding arrangement 650 may be omitted.

As previously described, the tool interface 611 is adapted to be brought into engagement with the torque transfer interface 145 of the tool. Accordingly, the torque transfer interface 145 may have an accommodating shape for receiving the tool interface 611 of the torque transferring device 600.

Referencing Figure 12, the tool interface 611 may comprise a guiding portion 690. The guiding portion 690 may have a guiding structure 6903. The guiding structure 6903 may be configured to engage the accommodating shape of the torque transfer interface 145 to enable guided sliding relative movement between the torque transfer interface 145 to the tool interface 611.

To secure the tool in an axial direction during tensioning of the spring, the tool interface 611 may further comprise an offset portion 6905. The offset portion 6905 may have an offset portion torque transferring structure 6906. The offset portion torque transferring structure 6906 may be configured to engage the accommodating shape of the torque transfer interface 145 to enable torque transfer from the torque transfer interface 145 to the tool interface 611.

The offset portion torque transferring structure 6909 may be configured to engage the accommodating shape of the torque transfer interface 145 at an angular offset relative to the guiding structure 6903.

Hence, upon being in torque transferring engagement with the accommodating shape of the torque transfer interface 145, the offset portion 6906 may be at an offset angle relative to the guiding structure 6903 of the guiding portion 690 upon said guiding structure 6903 portion being in sliding engagement with said accommodating shape.

The angular offset may be between 5 and 20 degrees. Preferably the angular offset may be approximately 10 degrees.

The angular offset may be considered an angular offset relative to the rotation axis RA and/or the shaft of the counterbalancing mechanism.

The guiding structure 6903 and the offset portion torque transferring structure 6906 may be formed by outer surfaces of the tool interface 611 comprising a plurality of interconnected planar surfaces.

Further referencing Figure 12, the offset portion 120 may be formed by a machined section of the tool interface 611. Accordingly, the offset portion torque transferring structure 6906 may be formed by means a machined section. The aforementioned planar surfaces may be formed by a plurality of tangentially extending recesses in the tool interface 611.

The offset portion 6905 may be arranged as an intermediate portion of the tool interface 611. Accordingly, the guiding portion 690 may comprise a first section 6901 and a second section 6902. Both the first section 6901 and the second section 6902 may have a guiding structure 6903. The offset portion 6905 may form an intermediate portion of the tool interface 611 arranged between first section 6901 and the second section 6902. This may allow for prevention of relative axial movement in both directions upon the torque transferring structure 6906 being in engagement with the accommodating shape of the torque transfer interface 145. Figures 13-14 depicts use of the torque transferring device 600 described with reference to Figure 12 together with the tool 100, e.g. the torsion spring tensioning tool 100. The torsion spring tensioning tool 100 has previously been described with reference to Figure 11.

In Figure 13, the torque transferring device 600 is about to be brought into engagement with the tool 100. The tool interface 611 is thus about be brought into engagement with the torque transfer interface 145. The tool interface 611 may be moved into engagement with the torque transfer interface 145 along the rotation axis RA. Upon reaching the torque transfer interface 145, the first portion 6901, e.g. the guiding portion of said first portion 6901, may be brought into sliding engagement with the accommodating shape of the torque transfer interface 145. The first portion 6901 may form a distal portion of the tool interface 611 relative to the rotation axis RA. The second portion 6902 may form a proximal portion and the offset portion 6905 may form an intermediate portion between said first and second portion. The tool interface 611 may thus be moved distally along the rotation axis RA to engage the torque transferring interface 145.

Upon further sliding guided movement along the rotation axis RA, the guiding structure 6903 of the first portion 6901 will be brought out of engagement with the accommodating shape of the torque transferring interface 145. The accommodating shape of the torque transferring interface 145 may instead align with the offset portion torque transferring structure 6906 allowing for torque transferring engagement between said offset portion torque transferring structure 6906 and the torque transfer interface 145.

In Figure 14, the tensioning of the spring has been initiated. The relative rotation between the torque transferring device 600 and the tool 100 causes the accommodating shape of the torque transfer interface 145 to engage the offset portion torque transferring structure 6906. Thereby, torque transfer from the tool 100 to the torque transferring device 600 is enabled. Further, the first and second portion 6901, 6902 not having the same orientation as the offset portion 6905 relative to the rotation axis prevents accidental relative movement along the rotation axis RA of the tool 100 and the torque transferring device 600. After the tensioning has been complete, a relative rotation in an opposite direction between the torque transferring device 600 and the tool 100 will cause the offset portion torque transferring structure 6906 and the accommodating shape to disengage from each other. Said rotation further allows the accommodating shape to align with the guiding structure of the first portion 6901, allowing the tool 100 to disengage the torque transferring device 600 by relative movement along the rotation axis RA, e.g. relative movement along the rotation axis RA in a proximal direction. Said movement may be guided by means of the sliding engagement between the guiding structure of the first portion 6901 and the accommodating shape of the torque transferring interface 145.

This manner of tensioning allows for a safe and user-friendly process due to not including additional elements to fixate the tool and torque transferring device in position.

According to one aspect, a torsion spring tensioning system is provided. The torsion spring tensioning system comprises a tool for tensioning a torsion spring of a counterbalancing mechanism of an overhead door. The torsion spring tensioning system further comprises a torque transferring device 600 according to any of the embodiments described herein for transferring torque from the tool to the torsion spring of the counterbalancing mechanism. Accordingly, the system comprises the torque transferring device for transferring torque from the tool to the spring of the counterbalancing mechanism to tension said spring.

In one embodiment, the tool may be a torsion spring tensioning tool 100. The torsion spring tensioning tool 100 may be a torsion spring tensioning tool 100 according to any of the embodiments described herein.

The torsion spring tensioning tool 100 may comprise the housing 80 and the gear wheel arrangement 20. The gear wheel arrangement 20 may be adapted to be mounted to the shaft 1001 of the counterbalancing mechanism. The gear wheel arrangement 20 may comprise the gear wheel 21. The gear wheel 21 may be rotatably arranged in the housing 80. The torsion spring tensioning tool 100 may further comprise the gear mechanism 54. The gear mechanism 54 may be coupled to the gear wheel 21 for rotating the gear wheel 21. The torque receiving part 610 may be adapted to be adapted to be connected to the gear wheel 21 to receive the torque.

In one embodiment, the torque receiving part 610 is fixed relative to the gear wheel 21. In one embodiment, the gear mechanism 54 comprises the torque receiving arrangement. The torque receiving arrangement 200 comprises the drivable member 208. The drivable member 208 is adapted to be brought into engagement with a driving member of a powered torque tool for transfer of torque to the gear wheel 21.

It should be appreciated that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the description is only illustrative and changes may be made in detail, especially in matters of shape, size and arrangement of parts within the scope of the invention to the full extent indicated by the appended claims.

Claims

1. Torque transferring device (600) for transferring torque from a tool to a spring of a counterbalancing mechanism of an overhead door for tensioning said torsion spring, the torque transferring device (600) being adapted to be mounted to a shaft (1001) of the counterbalancing mechanism, whereby torque transferring device (600) comprises: a torque receiving part (610) adapted to be connected to the tool to receive the torque, an engaging arrangement (32) adapted to engage the shaft (1001) of the counterbalancing mechanism, the engaging arrangement (32) comprising one or more engaging member (41) adapted to engage at least one corresponding engagement member (1004) of the shaft (1001) of the counterbalancing mechanism, the one or more engaging members (41) comprising at least one movable engaging member (43) movably connected to the torque receiving part (610), and a guiding arrangement (650) adapted to interplay with the at least one movable engaging member (43) such that rotation of the torque receiving part (610) causes movement of the at least one movable engaging member (43) for selectively engaging the at least one corresponding engagement member (1004) of the shaft (1001).

2. Torque transferring device (600) according to claim 1, wherein the guiding arrangement (650) is adapted to interplay with the at least one movable engaging member (43) such that rotation of the torque receiving part (610) causes movement of the at least one engaging member (43) between an engaged position and a disengaged position relative to the at least one corresponding engagement member (1004).

3. Torque transferring device (600) according to claim 2, wherein the at least one movable engaging member (43) comprises an engaging portion (433) adapted to engage the at least one corresponding engagement member (1004) of the shaft (1001) and wherein said engaging portion (433) is adapted to extend in a radial direction relative the shaft (1001) at least in the engaged position. 4. Torque transferring device (600) according to according to any one of the preceding claims, wherein the guiding arrangement (650) comprises a cam structure (615) adapted to interplay with the at least one movable engaging member (43), whereby relative rotation between the cam structure (615) and the at least one movable engaging member (43) causes the movement of the at least one movable engaging member (43).

5. Torque transferring device (600) according to any one of the preceding claims, wherein the engaging arrangement (32) comprises a mounting part (439) connected to the torque receiving part (610) and wherein the at least one movable engaging member (32) is movably mounted to the mounting part (439) thereby movably connecting the at least one movable engaging member (43) and the torque receiving part (610).

6. Torque transferring device (600) according to claim 5, wherein the guiding arrangement (650) is fix relative to the torque receiving part (610) and the mounting part (439) is rotatably connected to the torque receiving part (610).

7. Torque transferring device (600) according to claim 6, wherein the one or more movable engaging member (43) is pivotable relative to the torque receiving part (610) and rotation of the cam structure (615) causes the cam structure (615) to engage the one or more movable engaging member (43) thereby urging the movement of the at least one movable engaging member (43).

8. Torque transferring device (600) according to claim 7, the movable engaging member (43) comprising a cam portion (431) adapted to be engaged by the cam structure (615) and an engaging portion (433) adapted be brought into engagement with the corresponding engagement member (1004), wherein the movable engaging member (43) comprises an intermediate portion (432) between the engaging portion and the cam portion (431), the intermediate portion (432) comprising a pivot point (470) for the pivoting movement. 9. Torque transferring device (600) according to claim 5, wherein the mounting part (439) is fixedly connected to the torque receiving part (610) and rotatable relative to the guiding arrangement (650).

10. Torque transferring device (600) according to claim 9, wherein the cam structure (615) comprises one or more radially extending tracks (619) and each of the at least one movable engaging member (43) is slidably mounted in a radially extending track of the one or more radially extending tracks (619).

11. Torque transferring device (600) according to claim 10, wherein the engaging arrangement (32) comprises one or more pivotable guiding arms (617), wherein each pivotable guiding arm (617) is pivotably mounted to one of the at least one movable engaging member (43) and the mounting part (439) thereby movably connecting the movable engaging member (43) and the torque receiving part (610).

12. Torque transferring device (600) according to any one of the preceding claims, wherein torque receiving part (610) comprises a fixating arrangement (670) adapted to be fixated to a tool to receive the torque.

13. Torque transferring device (600) according to any one of the preceding claims, wherein the torque receiving part (610) comprises a tool interface (611) adapted to be brought into engagement with a tool to receive the torque.

14. Torque transferring device (600) according to claim 13, wherein the tool interface (611) is in the form of a nut.

15. Torque transferring device (600) according to any one of claim 5 to 14, wherein the at least one engaging member (41) comprises one or more fixed engaging member adapted to be fixed relative the mounting part (439). 16. Torque transferring device (600) according to any one of claim 13 to 15, wherein the tool interface (611) is adapted to be brought into engagement with a torque transfer interface (145) of the tool.

17. Torque transferring device (600) according to claim 16, wherein the torque transfer interface (145) has an accommodating shape for receiving the tool interface (611), and wherein the tool interface (611) comprises a guiding portion (690) having a guiding structure (6903) configured to slidably engage said accommodating shape to enable guided sliding relative movement between the torque transfer interface (611) and the torque transfer interface (145).

18. Torque transferring device (600) according to claim 17, wherein the tool interface (611) comprises an offset portion (6905) having an offset portion torque transferring structure (6906) configured to engage the accommodating shape to enable torque transfer from the torque transfer interface (145) to the tool interface (611), wherein the offset portion torque transferring structure (6906) is configured to engage the accommodating shape at an angular offset relative to the guiding structure (6903).

19. Torque transferring device (600) according to claim 17 or 18, wherein the angular offset is between 5 and 20 degrees.

20. Torque transferring device (600) according to claim 18 or 19, wherein the offset portion (6905) is formed by a machined section of the tool interface (611).

21. Torque transferring device (600) according to any one of claim 17 to 20, wherein the guiding portion (690) comprises a first and second section (6901, 6902) each having a guiding structure (6903) and wherein the offset portion (6905) forms an intermediate portion of the tool interface (611) arranged between the first and second section (6901, 6902). 22. Torsion spring tensioning system comprising a tool for tensioning a torsion spring of a counterbalancing mechanism of an overhead door and a torque transferring device (600) according to any one claim 1 to 21 for transferring torque from the tool to the torsion spring of the counterbalancing mechanism.

23. Torsion spring tensioning system according to claim 24, wherein the tool is a torsion spring tensioning tool (100), the torsion spring tensioning tool (100) comprising a housing (80) and a gear wheel arrangement (20) adapted to be mounted on a shaft (1001) of the counterbalancing mechanism, said gear wheel arrangement (20) comprising a gear wheel (21) rotatably arranged in the housing (80), wherein the torque receiving part (610) is adapted to be connected to the gear wheel (21) to receive the torque.

25. Torsion spring tensioning system according to claim 24, the torsion spring tensioning tool (100) further comprising a gear mechanism (54) coupled to the gear wheel (21) for rotating said gear wheel (21).

26. Torsion spring tensioning system according to claim 24 or 25, wherein the gear mechanism (54) comprises a torque receiving arrangement (250), the torque receiving arrangement (200) comprising a drivable member (208) adapted to be brought into engagement with a driving member of a powered torque tool for transfer of torque to the gear wheel (21).