Pin extractor

Abstract

The utility model relates to dismantling device technical field, especially, relate to a kind of pin pulling device, including pin pulling platform, sliding frame, connecting frame, connecting rod, first piston cylinder and second piston cylinder, first piston cylinder and sliding frame are located in pin pulling platform, sliding frame is slidably connected in pin pulling platform along front-back direction, the cylinder body of first piston cylinder is connected in pin pulling platform, the stem of first piston cylinder is connected in sliding frame, first piston cylinder is used to drive sliding frame to move along front-back direction, second piston cylinder and connecting frame are located in sliding frame, the cylinder body of second piston cylinder is connected in sliding frame, the stem of second piston cylinder can move along front-back direction, to abut on hydraulic support, one end of connecting rod is connected in connecting frame, the other end of connecting rod is used to connect the pin shaft of hydraulic support. In conclusion, the pin pulling efficiency of the pin pulling device of the utility model is high, and the pin shaft of larger specification can be pulled out.

Description

Technical Field

[0001] This utility model relates to the field of dismantling device technology, and in particular to a pin-pulling device. Background Technology

[0002] In the maintenance process of hydraulic supports for coal mine equipment, it is necessary to disassemble the articulated pins to ensure the smooth implementation of subsequent maintenance work. Currently, the most common method for removing articulated pins is to use tools such as a hammer to remove them. However, due to rust and coal slag accumulation at the joints of the articulated pins, it is difficult for workers to remove them quickly, resulting in low efficiency of the maintenance work. Utility Model Content

[0003] The purpose of this invention is to provide a pin-removing device to solve the technical problem that the hinge pin is difficult to remove quickly, resulting in low efficiency of maintenance operations.

[0004] To achieve the above objectives, this utility model provides a pin-pulling device, including a pin-pulling platform, a sliding frame, a connecting frame, a connecting rod, a first piston cylinder, and a second piston cylinder. The first piston cylinder and the sliding frame are mounted on the pin-pulling platform. The sliding frame is slidably connected to the pin-pulling platform in a front-back direction. The cylinder body of the first piston cylinder is connected to the pin-pulling platform, and the rod body of the first piston cylinder is connected to the sliding frame. The first piston cylinder is used to drive the sliding frame to move in a front-back direction. The second piston cylinder and the connecting frame are mounted on the sliding frame. The cylinder body of the second piston cylinder is connected to the sliding frame, and the rod body of the second piston cylinder can move in a front-back direction to abut against a hydraulic support. One end of the connecting rod is connected to the connecting frame, and the other end of the connecting rod is used to connect to the pin of the hydraulic support.

[0005] Optionally, it also includes a surrounding plate, which is connected to the sliding frame and forms a first through hole with the sliding frame. One end of the cylinder body of the second piston cylinder is rotatably connected to the sliding frame. The rotation axes of the second piston cylinder and the sliding frame are perpendicular to the front-back direction. The second piston cylinder is disposed through the first through hole in the front-back direction. There is an movable gap between the second piston cylinder and the first through hole.

[0006] Optionally, the sliding frame includes a sliding plate, a first rotating platform, a first connecting plate, and a second connecting plate. The first connecting plate extends in the front-rear direction, and the second connecting plate extends in the left-right direction and is located behind the first connecting plate. The first rotating platform is located on the front side of the second connecting plate. One end of the second piston cylinder is rotatably connected to the first rotating platform. The rotation axes of the second piston cylinder and the first rotating platform are perpendicular to the front-rear direction. The top of the first connecting plate is provided with a first ear plate, and the top surface of the sliding plate is provided with a second ear plate. The two ends of the surrounding plate are respectively connected to the first ear plate and the second ear plate. The inner side of the surrounding plate, the side of the first connecting plate, and the top surface of the sliding plate form the first through hole.

[0007] Optionally, it also includes two second piston cylinders, which are respectively disposed on both sides of the connecting frame in the left-right direction, and the connecting frame and the connecting rod are respectively disposed directly above the first piston cylinder.

[0008] Optionally, it also includes two guide rails, which are spaced apart in the left-right direction. Each guide rail includes a first guide plate and a second guide plate. The first guide plate is located on the top surface of the pin-pulling platform, and the second guide plate is located on the top surface of the first guide plate. The sliding frame includes a sliding plate and two mating blocks that correspond one-to-one with the guide rails. The two mating blocks are spaced apart in the left-right direction on the bottom surface of the sliding plate. Each mating block has a sliding groove on its side relative to the left-right direction. The sliding grooves of the two mating blocks are arranged opposite to each other or away from each other. The second guide plate is inserted into the corresponding sliding groove.

[0009] Optionally, the sliding frame further includes a sliding plate and two first connecting plates. The two first connecting plates are spaced apart on the top surface of the sliding plate in the left-right direction. Each of the two first connecting plates has a connecting groove on its opposite side. The connecting groove extends through to the top surface of the first connecting plate. The connecting frame includes a first abutting plate, which is engaged with the connecting grooves on both sides. The first abutting plate has a second through hole extending in the front-back direction. One end of the connecting rod has a second abutting plate. The connecting rod passes through the second through hole and extends forward. The second abutting plate is located behind the first abutting plate, and the front side of the second abutting plate can abut against the rear side of the first abutting plate.

[0010] Optionally, both first connecting plates are provided with a plurality of connecting slots along the front-to-back direction, and the connecting slots of the two first connecting plates are provided in a one-to-one correspondence.

[0011] Optionally, it also includes a second rotating platform and a third rotating platform. The second rotating platform is disposed on the top surface of the pin-pulling platform, and the third rotating platform is disposed on the sliding frame. The cylinder body of the first piston cylinder is rotatably connected to the second rotating platform. The rotation axes of the first piston cylinder and the second rotating platform are perpendicular to the front-back direction. The cylinder body of the first piston cylinder is rotatably connected to the third rotating platform. The rotation axes of the first piston cylinder and the third rotating platform are perpendicular to the front-back direction.

[0012] Optionally, it also includes a support platform, which is fixedly disposed in front of the connecting frame. The top surface of the support platform is provided with a support arc surface, which is used to support the pin of the hydraulic support.

[0013] Optionally, it also includes a control box, a fence, and a vision sensor. The control box and the fence are located on the top surface of the pin-pulling platform. The fence surrounds the first piston cylinder on both sides and the rear side in the left-right direction. The vision sensor is located on the fence and faces forward. The control box is connected to the first piston cylinder, the second piston cylinder, and the vision sensor.

[0014] Compared with the prior art, the pin-pulling device implemented in this utility model has the following advantages: In this novel pin-pulling device, both the first piston cylinder and the sliding frame are mounted on the pin-pulling platform. The sliding frame is connected to the pin-pulling platform in the front-to-back direction, and the first piston cylinder is connected to the sliding frame, enabling the first piston cylinder to drive the sliding frame to move in the front-to-back direction. The connecting frame is mounted on the sliding frame, and one end of the connecting rod is connected to the connecting frame, while the other end is connected to the pin of the hydraulic support. The rod of the first piston cylinder can retract into its cylinder body to pull the sliding frame backward, thereby causing the connecting rod to apply a backward pulling force to the pin. Furthermore, the second piston cylinder is positioned forward... On the sliding frame, the rod of the second piston cylinder can extend from its cylinder body to abut against the hydraulic support and push the sliding frame backward, thereby driving the connecting rod to apply a backward pulling force to the pin. In summary, the pin-pulling device of this utility model can apply a backward pulling force to the sliding frame by the first piston cylinder and a backward pushing force to the sliding frame by the second piston cylinder, so that the connecting rod connected to the connecting frame applies a backward pulling force to the pin, thereby performing the pin-pulling operation. Compared with manual pin-pulling operation, it has the advantages of high pin-pulling efficiency and the ability to pull out larger pins. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pin-pulling device of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the pin-pulling device of this utility model, ignoring the fence and visual sensor.

[0017] Figure 3This is the front view of the pin-pulling device of this utility model. Figure 4 This is a top view of the pin-pulling device of this utility model. Figure 5 for Figure 4 Sectional view of AA.

[0018] Figure 6 This is a left view of the pin-pulling device of this utility model.

[0019] Reference numerals: 1. Pin-pulling platform; 2. Sliding frame; 21. Sliding plate; 22. First rotating platform; 23. First connecting plate; 231. Connecting groove; 24. Second connecting plate; 25. First ear plate; 26. Second ear plate; 27. Butt block; 271. Slide groove; 3. Connecting frame; 31. First abutting plate; 311. Second through hole; 32. Handle; 321. Grip hole; 4. Connecting rod; 5. First piston cylinder; 6. Second piston cylinder; 7. Enclosure plate; 8. First through hole; 9. Guide rail; 91. First guide plate; 92. Second guide plate; 10. Second abutting plate; 20. Second rotating platform; 30. Third rotating platform; 40. Support platform; 401. Supporting arc surface; 50. Control box; 60. Fence; 70. Vision sensor. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] like Figures 1 to 6As shown, a pin-pulling device of this utility model includes a pin-pulling platform 1, a sliding frame 2, a connecting frame 3, a connecting rod 4, a first piston cylinder 5, and a second piston cylinder 6. The first piston cylinder 5 and the sliding frame 2 are disposed on the pin-pulling platform 1. The sliding frame 2 is slidably connected to the pin-pulling platform 1 in the front-back direction. The cylinder body of the first piston cylinder 5 is connected to the pin-pulling platform 1, and the rod body of the first piston cylinder 5 is connected to the sliding frame 2. The first piston cylinder 5 is used to drive the sliding frame 2 to move in the front-back direction. The second piston cylinder 6 and the connecting frame 3 are disposed on the sliding frame 2. The cylinder body of the second piston cylinder 6 is connected to the sliding frame 2, and the rod body of the second piston cylinder 6 can move in the front-back direction to abut against a hydraulic support. One end of the connecting rod 4 is connected to the connecting frame 3, and the other end of the connecting rod 4 is used to connect to the pin of the hydraulic support.

[0024] In the above technical solution, the first piston cylinder 5 and the sliding frame 2 are both mounted on the pin-pulling platform 1. The sliding frame 2 is connected to the pin-pulling platform 1 in the front-to-back direction, and the first piston cylinder 5 is connected to the sliding frame 2, enabling the first piston cylinder 5 to drive the sliding frame 2 to move in the front-to-back direction. The connecting frame 3 is mounted on the sliding frame 2, and one end of the connecting rod 4 is connected to the connecting frame 3, while the other end is connected to the pin of the hydraulic support. The rod of the first piston cylinder 5 can retract into its cylinder to pull the sliding frame 2 backward, thereby causing the connecting rod 4 to apply a backward pulling force to the pin. Furthermore, the second piston cylinder 6... The first piston cylinder 5 applies a backward pulling force to the sliding frame 2, and the second piston cylinder 6 extends from its cylinder body to abut against the hydraulic support, pushing the sliding frame 2 backward, thereby driving the connecting rod 4 to apply a backward pulling force to the pin. In summary, the pin-pulling device of this utility model can apply a backward pulling force to the sliding frame 2 through the first piston cylinder 5 and a backward pushing force to the sliding frame 2, so that the connecting rod 4 connected to the connecting frame 3 applies a backward pulling force to the pin, thereby performing the pin-pulling operation. Compared with manual pin-pulling operation, it has the advantages of high pin-pulling efficiency and the ability to pull out larger pins.

[0025] The first piston cylinder 5 and the second piston cylinder 6 can be pneumatic cylinders, electric cylinders, and hydraulic cylinders.

[0026] One end of the connecting rod 4 is detachably connected to the pin of the hydraulic support. Specifically, one end of the connecting rod 4 can be threaded to the pin of the hydraulic support.

[0027] As an example of this embodiment, it also includes a surrounding plate 7, which is connected to the sliding frame 2 and forms a first through hole 8 with the sliding frame 2. One end of the cylinder body of the second piston cylinder 6 is rotatably connected to the sliding frame 2. The rotation axes of the second piston cylinder 6 and the sliding frame 2 are perpendicular to the front-back direction. The second piston cylinder 6 is disposed through the first through hole 8 in the front-back direction, and there is an movable gap between the second piston cylinder 6 and the first through hole 8.

[0028] One end of the cylinder body of the second piston cylinder 6 is rotatably connected to the sliding frame 2 so that the second piston cylinder 6 can deflect when pushing the sliding frame 2, thereby preventing damage to the second piston cylinder 6. The surrounding plate 7 and the sliding frame 2 form a first through hole 8 to limit the offset range of the second piston cylinder 6 and prevent it from deflecting excessively.

[0029] As an example of this embodiment, the sliding frame 2 includes a sliding plate 21, a first rotating platform 22, a first connecting plate 23, and a second connecting plate 24. The first connecting plate 23 extends in the front-rear direction, and the second connecting plate 24 extends in the left-right direction and is located behind the first connecting plate 23. The first rotating platform 22 is located on the front side of the second connecting plate 24. One end of the second piston cylinder 6 is rotatably connected to the first rotating platform 22. The rotation axes of the second piston cylinder 6 and the first rotating platform 22 are perpendicular to the front-rear direction. The top end of the first connecting plate 23 is provided with a first ear plate 25, and the top surface of the sliding plate 21 is provided with a second ear plate 26. The two ends of the surrounding plate 7 are respectively connected to the first ear plate 25 and the second ear plate 26. The inner side of the surrounding plate 7, the side of the first connecting plate 23, and the top surface of the sliding plate 21 form the first through hole 8.

[0030] The first connecting plate 23 and the second connecting plate 24 can form an inverted T-shaped structure. The surrounding plate 7 can be an arc-shaped plate. The two ends of the surrounding plate 7 can be bolted to the first ear plate 25 and the second ear plate 26 respectively, so as to facilitate the disassembly and assembly of the second piston cylinder 6.

[0031] As an example of this embodiment, it also includes two second piston cylinders 6, which are respectively disposed on both sides of the connecting frame 3 in the left-right direction, and the connecting frame 3 and the connecting rod 4 are respectively disposed directly above the first piston cylinder 5.

[0032] Specifically, two second piston cylinders 6 apply a thrust in the front-to-back direction to the sliding frame 2 on both sides of the connecting frame 3 and the connecting rod 4, and at least one first piston cylinder 5 applies a pull in the front-to-back direction below the connecting frame 3 and the connecting rod 4 to prevent uneven force on the pin shaft, which could cause the pin shaft to deviate during the pulling process.

[0033] As an example of this embodiment, it also includes two guide rails 9, which are spaced apart in the left-right direction. Each guide rail 9 includes a first guide plate 91 and a second guide plate 92. The first guide plate 91 is disposed on the top surface of the pin-pulling platform 1, and the second guide plate 92 is disposed on the top surface of the first guide plate 91. The sliding frame 2 includes a sliding plate 21 and two docking blocks 27 corresponding one-to-one with the guide rails 9. The two docking blocks 27 are spaced apart in the left-right direction on the bottom surface of the sliding plate 21. Each docking block 27 has a sliding groove 271 on its side relative to the left-right direction. The sliding grooves 271 of the two docking blocks 27 are arranged opposite to each other or away from each other. The second guide plate 92 is inserted into the corresponding sliding groove 271.

[0034] The sliding groove 271 and the second guide plate 92 do not require a high-precision connection with a clearance fit. They can have a large gap, allowing the sliding frame 2 to shift to a certain extent. However, it is necessary to ensure that the sliding frame 2 can move in the front-back direction.

[0035] As an example of this embodiment, the sliding frame 2 further includes a sliding plate 21 and two first connecting plates 23. The two first connecting plates 23 are spaced apart on the top surface of the sliding plate 21 in the left-right direction. Each of the two first connecting plates 23 has a connecting groove 231 on its opposite side. The connecting groove 231 extends through to the top surface of the first connecting plate 23. The connecting frame 3 includes a first abutting plate 31. The first abutting plate 31 is engaged with the connecting grooves 231 on both sides. The first abutting plate 31 has a second through hole 311 extending in the front-back direction. One end of the connecting rod 4 is provided with a second abutting plate 10. The connecting rod 4 passes through the second through hole 311 and extends forward. The second abutting plate 10 is located behind the first abutting plate 31. The front side of the second abutting plate 10 can abut against the rear side of the first abutting plate 31.

[0036] After the connecting rod 4 is connected to the pin, the first abutting plate 31 slides down into the connecting groove 231 so that the connecting rod 4 passes through the second through hole 311 and the first abutting plate 31 can abut against the second abutting plate 10.

[0037] Furthermore, the connecting frame 3 also includes a handle 32, which is located on the top surface of the first abutment plate 31. The handle 32 has a gripping hole 321 that runs through the front and back direction, allowing workers to pass through the gripping hole 321 to grip the handle 32, thereby facilitating the lifting and lowering of the connecting frame 3.

[0038] As an example of this embodiment, both first connecting plates 23 are provided with a plurality of connecting slots 231 along the front-back direction, and the connecting slots 231 of the two first connecting plates 23 are provided in a one-to-one correspondence.

[0039] The multiple connecting slots 231 allow the first abutting plate 31 to be fixed at multiple positions in the front-back direction. When pulling out some longer pins, different positions can be selected in sequence to perform the pin pulling operation.

[0040] As an example of this embodiment, it also includes a second rotating platform 20 and a third rotating platform 30. The second rotating platform 20 is disposed on the top surface of the pin-pulling platform 1, and the third rotating platform 30 is disposed on the sliding frame 2. The cylinder body of the first piston cylinder 5 is rotatably connected to the second rotating platform 20. The rotation axes of the first piston cylinder 5 and the second rotating platform 20 are perpendicular to the front-back direction. The cylinder body of the first piston cylinder 5 is rotatably connected to the third rotating platform 30. The rotation axes of the first piston cylinder 5 and the third rotating platform 30 are perpendicular to the front-back direction.

[0041] The first piston cylinder 5 is rotatably connected to the second rotating platform 20 and the third rotating platform 30 at both ends, so that the first piston cylinder 5 can be deflected when pushing the sliding frame 2 to prevent damage to the first piston cylinder 5. The sliding frame 2 is slidably connected to the pin-pulling platform 1 in the front-back direction to limit the degree of deflection of the first piston cylinder 5.

[0042] As an example of this embodiment, it also includes a support platform 40, which is fixedly disposed in front of the connecting frame 3. The top surface of the support platform 40 is provided with a support arc surface 401, which is used to support the pin of the hydraulic support.

[0043] The supporting arc surface 401 supports the pin of the hydraulic support to prevent the pin from shifting when it is pulled out, thereby hindering the pin pulling operation.

[0044] As an example of this embodiment, it also includes a control box 50, a fence 60, and a vision sensor 70. The control box 50 and the fence 60 are located on the top surface of the pin-pulling platform 1. The fence 60 surrounds the first piston cylinder 5 on both sides and the rear side in the left-right direction. The vision sensor 70 is located on the fence 60 and faces forward. The control box 50 is connected to the first piston cylinder 5, the second piston cylinder 6, and the vision sensor 70.

[0045] The operator can control the movement of the first piston cylinder 5 and the second piston cylinder 6 through the control box 50, and monitor the specific pin-pulling operation through the vision sensor 70 to better carry out the pin-pulling operation. Furthermore, the fence 60 can prevent the operator standing on the pin-pulling platform 1 from falling when adjusting and disassembling the connecting rod 4 (the pin-pulling platform 1 will be placed on a forklift or lift for use), and provides the installation position for equipment such as the vision sensor 70.

[0046] Furthermore, staff can use a remote intelligent terminal (such as a mobile phone, computer, remote control, etc.) to connect to the control box 50. They can then remotely observe the status of the hydraulic support pin and connecting rod 4 through the vision sensor 70 on the remote intelligent terminal. They can also remotely control the first piston cylinder 5 and the second piston cylinder 6 to pull out the hydraulic support pin. During the process, staff do not need to get close to the hydraulic support and the pin-pulling device, which greatly improves the safety and work efficiency during the operation.

[0047] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit ​​connection.

[0048] Furthermore, detachable connection and detachable setting refer to the ability of two components to be repeatedly assembled and disassembled without damage or severe deformation, including but not limited to fixing by connectors or fixing by snap-fit ​​connections.

[0049] Furthermore, sliding connection and sliding setting refer to the connection between two connected components, where one component can slide along a fixed trajectory on the other component, including but not limited to connection by sliding a slider into a groove 271, or connection by inserting a slider into a hole whose size and profile match the slider.

[0050] Furthermore, rotatable connection and rotatable setting refer to the ability of two connected components to rotate, including but not limited to connections via bearings or clearance fits.

[0051] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.

[0052] In summary, this utility model embodiment provides a pin-pulling device, the technical effects of which are as follows: In this novel pin-pulling device, a first piston cylinder 5 and a sliding frame 2 are both mounted on a pin-pulling platform 1. The sliding frame 2 is connected to the pin-pulling platform 1 in the front-to-back direction, and the first piston cylinder 5 is connected to the sliding frame 2, enabling the first piston cylinder 5 to drive the sliding frame 2 to move in the front-to-back direction. A connecting frame 3 is mounted on the sliding frame 2, and one end of a connecting rod 4 is connected to the connecting frame 3, while the other end is connected to the pin of a hydraulic support. The rod of the first piston cylinder 5 can retract into its cylinder to pull the sliding frame 2 backward, thereby causing the connecting rod 4 to apply a backward pulling force to the pin. Furthermore, a second piston cylinder 6... The first piston cylinder 5 applies a backward pulling force to the sliding frame 2, while the second piston cylinder 6 extends from its cylinder body to abut against the hydraulic support and push the sliding frame 2 backward, thereby driving the connecting rod 4 to apply a backward pulling force to the pin. In summary, the pin-pulling device of this utility model can apply a backward pulling force to the sliding frame 2 through the first piston cylinder 5 and a backward pushing force to the sliding frame 2, so that the connecting rod 4 connected to the connecting frame 3 applies a backward pulling force to the pin, thereby performing the pin-pulling operation. Compared with manual pin-pulling operation, it has the advantages of high pin-pulling efficiency and the ability to pull out larger pins.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A pin-pulling device, characterized in that, The device includes a pin-pulling platform (1), a sliding frame (2), a connecting frame (3), a connecting rod (4), a first piston cylinder (5), and a second piston cylinder (6). The first piston cylinder (5) and the sliding frame (2) are located on the pin-pulling platform (1). The sliding frame (2) is slidably connected to the pin-pulling platform (1) in the front-back direction. The cylinder body of the first piston cylinder (5) is connected to the pin-pulling platform (1), and the rod body of the first piston cylinder (5) is connected to the sliding frame (2). The first piston cylinder (5) is used to drive the sliding frame (2) to move in the front-back direction. The second piston cylinder (6) and the connecting frame (3) are located on the sliding frame (2). The cylinder body of the second piston cylinder (6) is connected to the sliding frame (2), and the rod body of the second piston cylinder (6) can move in the front-back direction to abut against the hydraulic support. One end of the connecting rod (4) is connected to the connecting frame (3), and the other end of the connecting rod (4) is used to connect to the pin of the hydraulic support.

2. The pin-pulling device according to claim 1, characterized in that, It also includes a surrounding plate (7), which is connected to the sliding frame (2) and forms a first through hole (8) with the sliding frame (2). One end of the cylinder body of the second piston cylinder (6) is rotatably connected to the sliding frame (2). The rotation axis of the second piston cylinder (6) and the sliding frame (2) is perpendicular to the front-back direction. The second piston cylinder (6) is arranged to pass through the first through hole (8) in the front-back direction. There is an active gap between the second piston cylinder (6) and the first through hole (8).

3. The pin-pulling device according to claim 2, characterized in that, The sliding frame (2) includes a sliding plate (21), a first rotating platform (22), a first connecting plate (23), and a second connecting plate (24). The first connecting plate (23) extends along the front-rear direction, and the second connecting plate (24) extends along the left-right direction and is located behind the first connecting plate (23). The first rotating platform (22) is located on the front side of the second connecting plate (24). One end of the second piston cylinder (6) is rotatably connected to the first rotating platform (22). The rotation axes of the second piston cylinder (6) and the first rotating platform (22) are perpendicular to the front-rear direction. The top of the first connecting plate (23) is provided with a first ear plate (25), and the top surface of the sliding plate (21) is provided with a second ear plate (26). The two ends of the surrounding plate (7) are respectively connected to the first ear plate (25) and the second ear plate (26). The inner side of the surrounding plate (7), the side of the first connecting plate (23), and the top surface of the sliding plate (21) form the first through hole (8).

4. The pin-pulling device according to claim 1, characterized in that, It also includes two second piston cylinders (6), which are respectively located on both sides of the connecting frame (3) in the left-right direction. The connecting frame (3) and the connecting rod (4) are respectively located directly above the first piston cylinder (5).

5. The pin-pulling device according to claim 1, characterized in that, It also includes two guide rails (9), which are spaced apart in the left and right direction. Each guide rail (9) includes a first guide plate (91) and a second guide plate (92). The first guide plate (91) is located on the top surface of the pin-pulling platform (1), and the second guide plate (92) is located on the top surface of the first guide plate (91). The sliding frame (2) includes a sliding plate (21) and two docking blocks (27) that correspond one-to-one with the guide rails (9). The two docking blocks (27) are spaced apart in the left and right direction on the bottom surface of the sliding plate (21). Each docking block (27) has a groove (271) on its side relative to the left and right direction. The grooves (271) of the two docking blocks (27) are arranged opposite to each other or away from each other. The second guide plate (92) is inserted into the corresponding groove (271).

6. The pin-pulling device according to claim 1, characterized in that, The sliding frame (2) further includes a sliding plate (21) and two first connecting plates (23). The two first connecting plates (23) are spaced apart on the top surface of the sliding plate (21) in the left-right direction. The two first connecting plates (23) are provided with connecting grooves (231) on opposite sides. The connecting grooves (231) extend through to the top surface of the first connecting plate (23). The connecting frame (3) includes a first abutting plate (31). The first abutting plate (31) is engaged with the connecting grooves (231) on both sides. The first abutting plate (31) is provided with a second through hole (311) extending in the front-back direction. One end of the connecting rod (4) is provided with a second abutting plate (10). The connecting rod (4) passes through the second through hole (311) and extends forward. The second abutting plate (10) is located behind the first abutting plate (31). The front side of the second abutting plate (10) can abut against the rear side of the first abutting plate (31).

7. The pin-pulling device according to claim 6, characterized in that, Both first connecting plates (23) are provided with a plurality of connecting slots (231) along the front-back direction, and the connecting slots (231) of the two first connecting plates (23) are provided one-to-one.

8. The pin-pulling device according to claim 1, characterized in that, It also includes a second rotating platform (20) and a third rotating platform (30). The second rotating platform (20) is located on the top surface of the pin-pulling platform (1), and the third rotating platform (30) is located on the sliding frame (2). The cylinder body of the first piston cylinder (5) is rotatably connected to the second rotating platform (20). The rotation axes of the first piston cylinder (5) and the second rotating platform (20) are perpendicular to the front-back direction. The cylinder body of the first piston cylinder (5) is rotatably connected to the third rotating platform (30). The rotation axes of the first piston cylinder (5) and the third rotating platform (30) are perpendicular to the front-back direction.

9. The pin-pulling device according to claim 1, characterized in that, It also includes a support platform (40), which is fixedly located in front of the connecting frame (3). The top surface of the support platform (40) is provided with a support arc surface (401), which is used to support the pin of the hydraulic support.

10. The pin-pulling device according to claim 1, characterized in that, It also includes a control box (50), a fence (60) and a vision sensor (70). The control box (50) and the fence (60) are located on the top surface of the pin-pulling platform (1). The fence (60) surrounds the first piston cylinder (5) on both sides and the rear side in the left-right direction. The vision sensor (70) is located on the fence (60) and faces forward. The control box (50) is connected to the first piston cylinder (5), the second piston cylinder (6) and the vision sensor (70).

Images