KR102707339B1 - Double cylinder for automatic attachment and detachment of couplers and adapters and one-touch Euro connection - Google Patents

Abstract

The present invention relates to a double cylinder for automatic attachment and detachment of a coupler and adapter and one-touch oil connection, which enables automatic attachment and detachment of a coupler and adapter and one-touch connection or disconnection of a hydraulic oil hose of an attachment and an arm end at the same time when replacing and attaching and detaching various attachments to an arm end of a construction machine.
To this end, the present invention comprises: a body having a double cylinder which is inserted into a lower space of a coupler coupled to an arm end of a construction machine including an excavator and performs a linear motion, the body having a space for filling hydraulic oil therein, a pair of cylinder heads for coupling cylinder rods at both ends on one side, and a pair of pin plunger coupling portions for coupling pin plunger connectors at both ends on the other side; a pair of cylinder rods which are each inserted into a cylinder head of the body and perform a linear motion within the cylinder head in accordance with the flow direction of the hydraulic oil; an end cap which fixes the ends of the cylinder rods opposite to the cylinder heads to one side wall of the coupler so that the body can move forward and backward with respect to one side wall of the coupler within the lower space of the coupler in accordance with the relative positional relationship between the cylinder rods and the cylinder head; And a double cylinder for automatic attachment/detachment and one-touch euro connection of a coupler and an adapter is provided, which includes a pair of pin plungers, each of which is connected to a pair of pin plunger connectors and moves together according to the forward and backward movement of the body, to attach/detach a coupler to an adapter connected to an attachment.

Description

Double cylinder for automatic attachment and detachment of couplers and adapters and one-touch Euro connection{omitted}

The present invention relates to a double cylinder. More specifically, it relates to a double cylinder for automatic attachment/detachment of a coupler and an adapter and one-touch euro connection.

Construction equipment widely uses a method of replacing attachments at the end of an arm mounted on the main body according to the purpose. Attachments come in various types, such as buckets, hydraulic hammers (hydraulic breakers), rotators, tilt-rotators, compactors, crushers, and grapples, and some are driven by hydraulics while others are not.

Japanese Patent Publication No. 7152800 (published on October 13, 2022) discloses an example of an attachment replacement system.

According to the above prior art, a method is used in which a locking element moves forward or backward to connect an adapter coupled to an attachment to a quick changer (quick coupler) coupled to the end of an arm.

However, in this method, when mounting an attachment driven by hydraulic pressure, in addition to the operation of fixing the adapter to the quick changer by the slide of the locking element, an additional operation of connecting the hydraulic hose on the quick changer side and the hydraulic hose on the adapter side must be performed, which is inconvenient and cumbersome, and this acts as a factor of work delay.

Prior art document: JP registered patent publication No. 7152800 (announced on October 13, 2022)

The present invention has been made to solve the above problems, and in particular, it aims to provide a double cylinder capable of automatically attaching and detaching a coupler and an adapter when replacing and attaching and detaching various attachments to the arm end of a construction machine, and simultaneously connecting or disconnecting a hydraulic oil hose of the arm end and a hydraulic oil hose of an attachment with one touch.

In order to achieve the above object, a double cylinder for automatic attachment/detachment and one-touch oil connection of a coupler and an adapter according to an embodiment of the present invention is a double cylinder that is inserted into a lower space of a coupler coupled to an arm end of a construction machine including an excavator and performs a linear motion, the double cylinder having a space for filling hydraulic oil inside, a pair of cylinder heads for coupling cylinder rods at both ends on one side, and a pair of pin plunger coupling portions for coupling pin plunger connectors at both ends on the other side; a pair of cylinder rods each inserted into a cylinder head of the body and linearly moving within the cylinder head according to the flow direction of the hydraulic oil; an end cap that fixes the ends of the cylinder rods opposite to the cylinder heads to one side wall of the coupler so that the body can move forward and backward with respect to one side wall of the coupler within the lower space of the coupler according to the relative positional relationship between the cylinder rods and the cylinder head; And a pair of pin plungers, each coupled to a pair of pin plunger connectors, which move together according to the forward and backward movement of the body, thereby attaching and detaching the coupler to the adapter coupled to the attachment.

In addition, a double cylinder according to an embodiment of the present invention comprises a pair of oil connection holes provided spaced apart from each other between a pair of pin plunger coupling parts in a body; And it further includes a second one-touch connecting portion which is located in the space between one side wall of the coupler and the body, one end of which is connected to a hydraulic oil hose for driving an attachment of the arm, and the other end of which is mounted in a hole for connecting oil, and when the mount of the coupler is hooked on the rear pin of the adapter and settled when the coupler and the adapter are combined, the body is in a backward state, and when the coupler is pivotally rotated with the rear pin of the adapter as the rotation axis and completely rotated, the body moves forward and the second one-touch connecting portion is connected to the first one-touch connecting portion which was spaced from the body, so that the attachment can be hydraulically driven by the oil of the hydraulic oil hose for driving the attachment, and as the body moves forward, a pair of pin plungers move forward together, and the pin plungers are inserted under the front pin of the adapter, so that the adapter and the coupler which are coupled to the attachment can be combined.

In addition, a check valve is provided on the upper part of the cylinder head of the body according to an embodiment of the present invention, a relief valve is provided on the upper part of the pin plunger joint of the body, and when hydraulic oil is injected into the inside of the body through one oil hose, the cylinder rods on both sides move backward and are exposed to the rear of the cylinder head, and the body moves forward, and the check valve, which has a flow path connected to the cylinder head, opens and the flow passes toward the other oil hose, and when the oil pressure inside the body exceeds a threshold value, the relief valve, which has a flow path connected in parallel between the one oil hose and the cylinder head, opens to lower the pressure and protect the cylinder rod, and when the oil injected into the cylinder head during the operation of the cylinder rod is blocked, the check valve closes to prevent the backflow of oil while the cylinder rod moves backward toward the cylinder head and prevents the adapter and the coupler from being separated.

According to the present invention, as the body of the double cylinder advances by hydraulic pressure, a pair of pin plungers advance together, and the pin plungers are inserted under the front pin of the adapter, so that the adapter coupled to the attachment and the coupler coupled to the female end are coupled, thereby enabling automatic attachment and detachment of the coupler and adapter.

In addition, according to the present invention, as the body of the double cylinder advances by hydraulic pressure, automatic coupling of the coupler and the adapter is performed, and at the same time, the second one-touch connecting portion is connected to the first one-touch connecting portion that was spaced apart from the body, thereby enabling the hydraulic oil hose of the female end and the hydraulic oil hose of the attachment to be connected with one touch.

In addition, according to the present invention, when the oil pressure inside the body exceeds the threshold value due to an abnormal phenomenon of the cylinder head, etc., the cylinder rod is protected by the relief valve, and when the oil is blocked during the operation of the cylinder rod, the check valve prevents the oil from flowing back, thereby preventing the adapter and coupler from separating as the cylinder rod retracts toward the cylinder head.

Figure 1 is an exploded perspective view of a double cylinder for automatic attachment and detachment of a coupler and adapter and one-touch euro connection according to one embodiment of the present invention.
Figure 2 is an exploded perspective view of the double cylinder and coupler.
Figure 3 is a perspective view of the double cylinder and coupler separated.
Figure 4 is a perspective view of the coupler and adapter with double cylinders separated.
Figure 5 is a perspective view of the mount of the coupler equipped with a double cylinder, which is hung and secured on the rear pin of the adapter.
Figure 6 is a perspective view of the coupler and adapter combined and the double cylinder in the reverse position.
Figure 7 is a perspective view of the double cylinder in Figure 6 with the cylinder moving forward.
Figure 8 is a schematic diagram of a double cylinder moving backwards and with the flow path not connected.
Figure 9 is a schematic diagram of a state in which the double cylinder is moved forward and the first one-touch connection part and the second one-touch connection part are connected, thereby connecting the euro.
Figure 10 is a circuit diagram for explaining the operation process and protection means of a double cylinder.
Figures 11 to 18 are images modeling the attachment mounting process of a construction machine with a double cylinder applied for automatic attachment/detachment and one-touch euro connection of a coupler and adapter according to one embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when adding reference symbols to components of each drawing, it should be noted that the same components are given the same symbols as much as possible even if they are shown in different drawings. In addition, when describing the present invention, if it is judged that a specific description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, although preferred embodiments of the present invention will be described below, it should be understood that the technical idea of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art.

FIG. 1 is an exploded perspective view of a double cylinder for automatic attachment and detachment of a coupler and an adapter and a one-touch flow connection according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of a double cylinder and a coupler, FIG. 3 is a perspective view of a double cylinder and a coupler separated, FIG. 4 is a perspective view of a coupler with a double cylinder and an adapter separated, FIG. 5 is a perspective view of a coupler with a double cylinder mounted on it and a mount fixed on the rear pin of the adapter, FIG. 6 is a perspective view of a coupler and an adapter coupled and a double cylinder retracted, FIG. 7 is a perspective view of a double cylinder advanced in FIG. 6, FIG. 8 is a schematic view of a double cylinder advanced and a flow connection not connected, FIG. 9 is a schematic view of a double cylinder advanced and a first one-touch connection part and a second one-touch connection part connected, and FIG. 10 is a schematic view of a double cylinder This is a circuit diagram to explain the operation process and protective measures. In the following, front and rear are based on the line of sight of the driver sitting in the cabin, which is the driver's seat of the construction machine. The direction away from the driver is defined as front, and the direction approaching the driver is defined as rear.

A double cylinder (1) for automatic attachment/detachment and one-touch euro connection of a coupler and adapter according to one embodiment of the present invention includes a body (10), a cylinder rod (20), an end cap (22), a second one-touch connection (24), a check valve (26), a pin plunger (28), and a pin plunger connector (30), with reference to FIGS. 1 to 10.

A double cylinder (1) is inserted into the lower space of a coupler (100) that is connected to the arm end of a construction machine including an excavator and performs linear motion.

The body (10) includes a cylinder head (12), a check valve joint (14), a pin plunger joint (16), and an oil connection hole (18).

The inside of the body (10) is provided with a space for filling hydraulic oil, and a flow path for driving a double cylinder is formed. The body (10) may be formed in an H-shape as shown in FIGS. 1 and 2, and the shape of the body is not limited thereto.

Cylinder heads (12) are provided on both ends of one side of the body (10), and a pair are provided for coupling the cylinder rods (20). The name double cylinder (1) is derived from the fact that two cylinder heads (12) and two cylinder rods (20) are formed. Since the cylinders on both sides operate simultaneously, the body (10) is maintained parallel to one side wall (110) of the coupler (100) when moving forward and backward, thereby increasing the accuracy of linear motion and enabling faster operation.

A pair of check valve joints (14) are provided on the upper part of the cylinder head (12). A check valve (26) is detachably coupled to the check valve joint (14).

A pin plunger coupling part (16) is provided on both ends of the other side of the body (10), and a pair is provided for coupling the pin plunger connector (30).

An oil connection hole (18) is provided spaced apart from each other between a pair of pin plunger connecting parts (16) in the body (10). Referring to Fig. 8, a second one-touch connecting part (24) is fixedly supported in the oil connection hole (18).

The cylinder rods (20) are each inserted into the cylinder heads (12) of the body (10) and perform linear motion within the cylinder heads (12) according to the flow direction of the hydraulic oil.

The end cap (22) secures the end of the cylinder rod (20) opposite the cylinder head (12) to one side wall (110) of the coupler (100). Accordingly, the end cap (22) allows the body (10) to move forward and backward with respect to one side wall (110) of the coupler within the lower space of the coupler (100) according to the relative positional relationship between the cylinder rod (20) and the cylinder head (12).

The second one-touch connection (24) is located in the space between one side wall (110) of the coupler (100) and the body (10). One end (the portion bent upward in FIG. 8) of the second one-touch connection (24) is connected to a hydraulic oil hose for driving an attachment of the arm, and the other end is mounted in a hole (18) for oil connection.

The check valve (26) is provided on the upper part of the cylinder head (12) of the body (10). More specifically, the check valve (26) is detachably connected to the check valve joint (14). The detailed operation of the check valve (26) will be described later.

The pin plunger (28) is respectively connected to a pair of pin plunger connectors (29) and moves together with the forward and backward movement of the body (10), thereby attaching and detaching the coupler to the adapter (200) connected to the attachment.

The pin plunger connector (29) is coupled to the pin plunger coupling portion (16) to secure the pin plunger (28) to the body.

Referring to FIGS. 4 to 9, the automatic attachment/detachment process of the coupler and adapter by the operation of the double cylinder and the one-touch euro connection/disconnection process are explained.

Referring to Fig. 4, a coupler (100) equipped with a double cylinder (1) is illustrated on the right, and an adapter (200) coupled with the coupler (100) is illustrated on the left.

The coupler (100) is coupled to the arm end of a construction machine, including an excavator, and the adapter (200) is coupled to an attachment, including a hydraulic hammer. When the adapter (200) is coupled to the coupler (100), the arm end and the attachment are physically coupled, and the oil hose for hydraulic drive of the arm end and the oil hose of the attachment are connected to each other, so that hydraulic drive of the attachment (e.g., operation of a hydraulic hammer) is possible by manipulation from the cabin, which is the driver's seat.

The adapter (200) includes a front pin (210), a fixed holder (220), and a rear pin (230).

A fixed part (32) is coupled and fixed to the fixed part holder (220). A first one-touch connection part (30) is coupled to the fixed part (32).

In FIGS. 4 and 5, the fixed part (32) and the first one-touch connection part (30) are shown on the coupler (100) side for convenience of understanding, but as mentioned above, the fixed part (32) and the first one-touch connection part (30) are actually coupled to the fixed part holder (220) of the adapter (200).

Referring to Fig. 5, the coupler (100) is lifted by manipulating the female end, and the mount (104) located at the rear of the coupler (100) is hooked onto the rear pin (230) of the adapter (200) and seated. At this time, the body (10) is in a backward state as shown in Figs. 5 and 6.

Referring to FIGS. 7 to 9, the coupler (100) is pivotally rotated with the rear pin (230) of the adapter (200) as the rotation axis, and when it is completely rotated, the body (10) moves forward. At this time, the second one-touch connection part (24) is connected to the first one-touch connection part (30) that was spaced apart from the body (10), thereby enabling hydraulic driving of the attachment with oil from the hydraulic oil hose for driving the attachment.

In addition, as the body (10) advances, a pair of pin plungers (28) advance together, and the pin plungers (28) are inserted under the front pins (210) of the adapter (200), so that the adapter (200) and the coupler (100) are coupled to the attachment.

When the direction of hydraulic flow is reversed, the body (10) moves backwards, the first one-touch connection (30) and the second one-touch connection (24) are separated, and the flow connection is released, and at the same time, the adapter (200) is separated from the coupler (100).

Referring to Fig. 10, the operation process and protection means of the double cylinder are explained.

In the circuit diagram of Fig. 10, a check valve (26) and a relief valve (R) are located on the euro.

The check valve (26) is located on the upper part of the cylinder head (12) of the body (10), and the relief valve (R) is not shown, but may be provided as a pair on the upper part of the pin plunger joint (16) of the body (10). Here, the positions of the check valve and the relief valve are not limited.

When hydraulic oil is injected into the body (10) through the oil hose (A) on one side, the cylinder rods (20) on both sides move backwards and are exposed to the rear of the cylinder head (12), and the body (10) moves forward. At this time, the check valve (26) connected to the cylinder head (12) opens, allowing the flow to pass through the oil hose (B) on the other side.

When the oil pressure inside the body (10) exceeds a threshold value (e.g. 300 bar) due to an abnormality in the cylinder head (12), a relief valve (R) connected in parallel between one side oil hose (A) and the cylinder head (12) opens to lower the pressure and protect the cylinder rod (20).

Meanwhile, if the oil injected into the cylinder head (12) is blocked during operation of the cylinder rod (20), the cylinder rod (20) may move backwards toward the cylinder head (12), causing an accident in which the adapter and coupler are separated.

To prevent such accidents, when the oil injected into the cylinder head (12) is cut off during operation of the cylinder rod (20), the pressure inside the body (10) decreases and the check valve (26) closes. Accordingly, the backflow of oil is prevented, and the cylinder rod (20) is prevented from retreating, thereby preventing the separation of the adapter and coupler.

Figures 11 to 18 are images modeling the attachment mounting process of a construction machine with a double cylinder applied for automatic attachment/detachment and one-touch euro connection of a coupler and adapter according to one embodiment of the present invention.

Referring to Fig. 11, a coupler is coupled to the arm end of the construction machine, various attachments are arranged on the floor, and an adapter is coupled to the end of the attachment.

Referring to Figure 12, a hydraulic hammer is selected among the attachments and the coupler approaches the adapter of the hydraulic hammer.

Referring to FIGS. 13 and 14, the process of fixing the mount of the coupler to the rear pin of the adapter is illustrated.

Referring to Fig. 15, the coupler is rotated around the rear pin of the adapter as a rotation axis to connect the adapter and the coupler, and the hydraulic hoses are connected with one touch at the same time. For convenience, the illustration of the coupler is omitted in Fig. 15.

Referring to Figure 16, it is expressed that the hydraulic hose of the female end and the hydraulic hose of the attachment are connected to each other and the flow path is integrated.

Referring to FIGS. 17 and 18, it can be confirmed that the hydraulic hammer is now operable.

The above description is merely an illustrative description of the technical idea of the present invention, and those skilled in the art will appreciate that various modifications, changes, and substitutions may be made without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention but to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

1: Double cylinder 10: Body
20 : Cylinder rod 22 : End cap
24: Second one-touch connection 26: Check valve
28: Pin plunger 29: Pin plunger connector
30: 1st one-touch connection part 32: Fixed part
100 : Coupler 104 : Mount
200 : Adapter 210 : Front pin
220 : Fixed holder 230 : Rear pin

Claims (3)

A double cylinder that is inserted into the lower space of a coupler that is connected to the arm end of a construction machine including an excavator and performs linear motion.
A body having a hydraulic oil filling space inside, a pair of cylinder heads for coupling cylinder rods at both ends on one side, and a pair of pin plunger coupling portions for coupling pin plunger connectors at both ends on the other side;
A pair of cylinder rods each inserted into the cylinder head of the body and moving linearly within the cylinder head in the direction of flow of hydraulic oil;
An end cap that secures the end of a cylinder rod opposite to the cylinder head to one side wall of the coupler, thereby allowing the body to move forward and backward with respect to one side wall of the coupler within the lower space of the coupler according to the relative positional relationship between the cylinder rod and the cylinder head;
A pair of pin plungers, each coupled to a pair of pin plunger connectors and moving together with the body as it moves forward and backward, to attach and detach the coupler to the adapter coupled to the attachment;
A pair of oil connection holes provided spaced apart from each other between a pair of pin plunger joints in the body; and
A second one-touch connection located in the space between one side wall of the coupler and the body, one end of which is connected to a hydraulic oil hose for driving the attachment of the arm, and the other end of which is mounted in a hole for oil connection.
Including,
When the coupler and adapter are combined, the mount of the coupler is hooked onto the rear pin of the adapter and the body is in a backward state, and when the coupler is pivotally rotated with the rear pin of the adapter as the rotation axis and completely rotated, the body moves forward and the second one-touch connection is connected to the first one-touch connection that was separated from the body, so that the attachment can be hydraulically driven by the oil of the hydraulic oil hose for driving the attachment.
A double cylinder for automatic attachment and detachment of couplers and adapters and one-touch euro connection, in which a pair of pin plungers advance together as the body advances, and the pin plungers are inserted under the front pins of the adapter to engage the adapter and coupler coupled to the attachment.
delete In the first paragraph,
A check valve is provided on the upper part of the cylinder head of the body.
A relief valve is provided on the upper part of the pin plunger joint of the body.
When hydraulic oil is injected into the body through one oil hose, the cylinder rods on both sides move backwards and are exposed to the rear of the cylinder head, causing the body to move forward, and the check valve connected to the cylinder head and the oil path opens, allowing the flow to pass through the other oil hose.
When the oil pressure inside the body exceeds the threshold value, a relief valve connected in parallel between one side oil hose and the cylinder head opens to reduce the pressure and protect the cylinder rod.
Double cylinder for automatic attachment and detachment of coupler and adapter and one-touch oil connection, which prevents reverse oil flow by closing the check valve to prevent separation of adapter and coupler when cylinder rod is retracted toward cylinder head in case oil injected into cylinder head is blocked during cylinder rod operation.