HK1080443B - Apparatus for adjusting steering angle for elevator sheave - Google Patents

Description

Device for adjusting the diverting angle of an elevator sheave

This application is a divisional application of the patent application with the filing number 01143161.X, filing date 12, 11, 2001, entitled "method and device for adjusting the diverting angle of an elevator sheave".

Technical Field

The invention relates to the field of elevators, and in particular to a device for adjusting the diverting angle of an elevator pulley during or after installation.

Background

When a flat steel rope or belt passes over a pulley or shaft, it can ride over the pulley or shaft under certain conditions: (1) if the belt is not perfectly vertical, or (2) the belt has non-uniform characteristics across its cross-section. For example, the sanding belt of a belt sander moves across the shaft during use, which requires adjustment of the shaft to ensure that the sanding belt is perpendicular to the shaft. Another example is a video recorder, which is provided with a track control device for the same purpose. If the belt is displaced laterally on the shaft too far, the belt may pull off of the shaft and cause the belt to become damaged, entangled or cut into two pieces.

In the early industrial age, with the development of belt-driven machines, it was found that: having a slightly curved cross-section and providing a slightly curved portion on the shaft reduces the likelihood of a derailment and limits horizontal movement of the belt to a small area. Thus, as long as the angle between the belt and the shaft approaches 90 degrees, there is a stable region even if precise perpendicularity cannot be maintained.

If a coated steel belt is used instead of a steel rope in an elevator, its shaft must be mounted in the above-mentioned stable area and it must be possible to adjust the shaft as required throughout the life of the elevator.

Disclosure of Invention

In short, the diverting angle of the elevator pulleys on the shaft can be adjusted during installation and during maintenance after installation by one of several embodiments. In one embodiment, the bolt provided with a locknut is adjusted to enable precise positioning of the shaft. In another embodiment, a T-shaped bracket is secured to the wall of the hoistway and an adjustment bolt provided with shims is used to adjust the vertical movement of the long beam that supports the frame and shaft of the cab.

According to one embodiment of the invention, the means for adjusting the diverting angle of the elevator sheave on one shaft comprise holding means for holding the shaft on the elevator car frame; a vertical positioning device for adjusting the vertical position of the shaft; a positioning device for adjusting the horizontal position of the shaft; in this way, the axial direction of the shaft can be adjusted to be substantially perpendicular to the direction of gravity, which acts on the elevator car frame.

According to one embodiment of the invention, the device for adjusting the diverting angle of an elevator sheave on an axle comprises a stopping device holding the axle on a first frame; a flat steel cable wound around the pulley, the flat steel cable having an entering direction and an exiting direction with respect to the pulley; a first positioning device for adjusting the position of the shaft relative to the entry direction of the flat cable, thereby adjusting the axial direction of the shaft to a position substantially perpendicular to the entry direction.

The invention also proposes a device for adjusting the diverting angle of an elevator sheave mounted on a shaft, comprising: means for retaining said shaft on the elevator cab frame; a flat steel cable passing through said pulley, said flat steel cable having a desired entry direction and a desired exit direction with respect to said pulley; a first positioning means for adjusting the axial direction of said shaft in a direction perpendicular to the entering direction of said flat steel cable, a second positioning means for adjusting the axial direction of said shaft in a direction perpendicular to the exiting direction of said flat steel cable, and a lever, wherein the flat steel cable is maintained such that the entering direction of said flat steel cable is substantially parallel to the exiting direction of said flat steel cable when the flat steel cable passes through the pulley, wherein said holding means comprises a shaft mounting member having a hole receiving an end cap on one end of said shaft, said lever being mounted to said shaft mounting member at a pivot point, said lever comprising a hole aligned with said hole of said shaft mounting member for receiving said end cap.

Drawings

FIG. 1 shows a first embodiment of the present invention;

FIG. 2 shows a second embodiment of the invention;

fig. 3 shows a modified structure of the second embodiment of the present invention;

FIG. 4 shows a third embodiment of the present invention;

FIG. 5 shows a fourth embodiment of the present invention;

FIG. 6 shows a side view of a T-shaped bracket and shim according to a fourth embodiment of the present invention;

figure 7 shows a top view of a T-shaped bracket used in a fourth embodiment of the invention.

Detailed Description

Referring to fig. 1, a multi-strip Coated Steel Belt (CSB)10 is wound on a shaft 12 or on a pulley (not shown) of the shaft 12. The pulley may be supported on bearings on the shaft 12 in a conventional manner, or the shaft 12 may be supported on bearings in at least one non-rotatable end cap 14 in a conventional manner. Other support means are known in the art. The direction of the force acting on shaft 12 is determined by the direction of movement of coated steel strip 10 relative to shaft 12. In the simplest case, the entry and exit directions of the CSB are parallel to each other and opposite to the direction of gravity, i.e. gravity is vertical. In other cases, the CSB10 has an incoming direction and an outgoing direction relative to the direction of gravity. The steering angle of the axle 12 needs to be adjustable regardless of the direction of the force applied to the axle 12 by the CSB 10.

In summary, there are two cases of adjusting the steering angle of the shaft 12. Either the adjustment mount is located on the same side of the shaft 12 as the direction of entry or exit of the CSB10, or on opposite sides of the shaft. Shims or adjusting bolts may be used when the adjusting mount is on the same side of the shaft 12 as the direction of entry or exit of the CSB 10. A through bolt, U-bolt or any structure that can be moved about the shaft 12 and secured to a permanent support can be used when the adjustment support is on opposite sides of the CSB10 in and out directions, respectively. The following examples are illustrative of both of these cases.

The end cap 14 fits through a hole (not shown) in a shaft mounting member 16 and through a hole 18 in a lever 20. The first bolt 22 connecting the lever 20 and the axle mounting member 16 provides a pivot point for the lever. A second bolt 26 connects the lever 20 and the axle mounting member 16 together through the cutout 24. The adjuster bolt 28 is threaded onto a flange 30 of the offset shaft mounting member 16 with the end of the adjuster bolt 28 abutting the lever 20. The flange 30 may alternatively be integrally formed with the axle mounting member 16. The jack bolt 28 is preferably tightened by a locknut 32. Lever 20 provides a number of particular advantages.

(a) When the roll of CSB10 is adjusted without being in a 180 degree position, friction can be reduced.

(b) Mechanical advantage of force or displacement can be provided to allow fine tuning.

(c) Since the adjuster bolt 28 acts on the lever 20 rather than on the shaft 12, it protects the shaft ends when in place.

(d) Flexibility is provided in positioning the adjustment bolt 28 relative to the shaft 12 because the operator can rest the adjustment bolt 28 on the shaft 12, or move it closer to the pivot point, or make the lever 20 longer and place the adjustment bolt 28 at a more distant location relative to the pivot point, thereby improving leverage and allowing for more precise adjustment of the position of the shaft 12.

(e) Since the adjusting screw 28 can be operated directly on the lever 20, adjustment can also be effected when the adjusting screw 28 cannot act directly on the shaft 12.

To adjust the orientation of the shaft 12, the adjustment bolt 28 is rotated, thereby changing the vertical orientation of the shaft 12. Once the correct orientation is reached, the shaft 12 is secured by the fastening bolts 22, 26 and locked by the locknut 32. An optional bolt 34 is used to secure the shaft 12 against axial loads. Rather than an end cap, a bearing (not shown) may be mounted in the bore 18 of the lever 20 for the shaft 12. If adjustment in two directions is required, adjustment means in each direction may be provided on the same end of the shaft 12 or on opposite ends of the shaft 12 respectively.

Referring to fig. 2, a bracket 36 is attached to the axle mounting member 16. A bolt 38 passes through the bracket 36 and the end cap 14. Two nuts 40, one on each side of the end cap 14, are turned to adjust the position of the shaft 12. Once the shaft 12 is properly positioned, the locknut 42 secures the shaft 12 relative to the bracket 36.

Referring to FIG. 3, the bracket 48 is attached to a flange 50 of the axle mounting member 16. The bolt 38 may be assembled through the end cap 14 and then through the bracket 48, unlike the embodiment of fig. 2, in which the bolt 38 is assembled through the bracket 36 and then through the end cap 14. The bolt 38 is fixed to the bracket 48 by nuts 44, 45. The nut 40 may be turned to adjust the exact position of the shaft 12 and then the shaft 12 is secured in place by a locknut 46.

Referring to fig. 4, end cap 14 is secured in place by a U-bolt. A groove (not shown) may be cut into end cap 14 for fitting a U-bolt. The U-bolt 52 is inserted on a plate 54, and the plate 54 is connected to the axle mounting member 16, adjustable by a plurality of nuts 56 and secured in the loading direction by a plurality of nuts 58.

Referring to fig. 5, at least one coated steel belt (not shown) is wound around the corresponding driving pulley 60. The drive sheave 60 is part of a machine 60 that those skilled in the art generally recognize as a motor and sheave assembly for use on an elevator. The machine 62 is mounted on a frame 64, and the frame 64 is supported within the hoistway by at least one long cross member 66, as shown in fig. 5. Other support members, such as support member 67 shown in phantom, may optionally be secured between the long beams. One end 68 of elongated beam 66 is supported on acoustic insulator pad 74 located in cavity 70 of rear channel wall 72, while the other end 76 of elongated beam 66 is supported on acoustic insulator pad 82 located in cavity 78 of front channel wall 80.

Referring to fig. 6, a T-shaped bracket 84 is supported within the cavity 78. The T-shaped bracket 84 is secured to the front channel wall 80 by conventional means such as bolts 86. A plurality of spacers 88 are located above the top of the T-shaped bracket 84 and below the acoustic insulator mat 82. The system must design a total predetermined height of shims to adjust the entire system in both directions by removing or adding shims. When the long beam 66 is precisely positioned, the spacer 88 may be removed or added as desired. The spacers 88 may have the same thickness or a variable thickness preferably varying between 1mm and 8 mm. The stacking of the shims preferably ranges from no shims to 100mm high.

Referring to FIG. 7, an adjustment bolt 90 is threaded into a hole 92 located in the top 94 of the T-bracket 84. The adjustment bolt 90 preferably abuts the support member and can be rotated to raise the end 76 of the long beam 66 to allow the operator to insert or remove the spacer 88 as desired. Horizontal positioning can be accomplished by properly mounting the T-bracket 84, while vertical positioning can be accomplished by adjusting the bolts 90 and spacers 88. The spacer is preferably held in place by two spacer retaining bolts 96, wherein the retaining bolts 96 are threaded into through holes 98 located on the top 94 of the T-bracket 84. Two nuts 100 sized to mate with the adjustment bolts 90 are preferably welded to the side holes of the T-bracket 84 and used to mount the adjustment bolts 90 after adjustment of the long beam 66 is completed.

While the present invention has been described with reference to particular embodiments and the accompanying drawings, it will be understood by those skilled in the art that: the invention is not limited to the preferred embodiments, but various variations and modifications can be made without departing from the scope of the invention.

Claims (4)

1. An apparatus for adjusting the diverting angle of an elevator sheave mounted on a shaft, comprising:

means for retaining said shaft on the elevator cab frame;

a flat steel cable passing through said pulley, said flat steel cable having a desired entry direction and a desired exit direction with respect to said pulley;

a first positioning device for adjusting the axial direction of the shaft in a direction perpendicular to the entry direction of the flat steel cord,

a second positioning device for adjusting the axial direction of the shaft in a direction perpendicular to the direction of exit of the flat steel cable, an

A lever is arranged on the upper portion of the handle,

wherein the flat steel rope is maintained such that an entering direction of the flat steel rope is parallel to an exiting direction of the flat steel rope when the flat steel rope passes through the pulley,

wherein the retaining means comprises a shaft mounting member having an aperture to receive an end cap on one end of the shaft,

the lever is mounted to the shaft mounting member at a pivot point,

the lever includes an aperture aligned with the aperture of the axle mounting feature for receiving the end cap.

2. The apparatus of claim 1, wherein: the second positioning means comprises a bracket coupled to the axle mounting member and a bolt passing through the bracket and an end cap of the axle.

3. The apparatus of claim 1, wherein: the second positioning means comprises a flange connected to the axle mounting member, a bracket connected to the flange, and a bolt passing through the bracket and the end cap of the axle.

4. The apparatus of claim 1, wherein: the first positioning device and the second positioning device are disposed at the same end of the shaft.