Pin shaft dismounting and mounting device

Abstract

The utility model provides a pin shaft disassembling and assembling device. The pin shaft disassembling and assembling device comprises a frame body and a pin shaft, the lifting table is movably arranged on the frame body, and the lifting table can ascend and descend in the vertical direction; the clamping assembly is arranged on the lifting table, the clamping assembly is provided with a clamping part, and the clamping part is used for clamping and fixing the crawler belt; and the ejector is arranged on the lifting table, the telescopic end of the ejector corresponds to the clamping assembly, and the ejector is used for ejecting the pin shaft out of the crawler belt or ejecting the pin shaft into the crawler belt. According to the technical scheme provided by the utility model, the problems of low efficiency and low safety when the track pin shaft is disassembled and assembled in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pin shaft dismounting technical field, specifically, relate to a pin shaft dismounting device. BACKGROUND

[0002] Coal mine machinery refers to the machinery that is specially used for coal mining, in order to ensure the passability of mechanical vehicles on the ground without roads and reduce the driving resistance, some coal mine mechanical equipment (such as continuous excavator, caterpillar type bulldozer, caterpillar type transfer vehicle etc.) generally take caterpillar as walking device, and caterpillar pin shaft as connecting component of mechanical caterpillar, in the mechanical operation process, the mechanical operation process often cannot continue to run due to the wear of pin shaft, and maintenance personnel needs to dismount and replace the worn caterpillar pin shaft, for the dismounting of large mechanical pin shaft with more serious wear, the special pin shaft dismounting equipment is generally used for dismounting, however, the sizes of caterpillars of different machines are different, leading to the difference of the height positions of pin shafts, and the dismounting equipment itself is heavy, when the pin shafts of caterpillars with different heights are dismounted, it is inconvenient to align the dismounting equipment with the pin shafts to be dismounted, thereby affecting the maintenance efficiency of the working machine, leading to the lag of construction period. In addition, when the dismounting equipment aligns and dismounts the pin shaft, the deviation phenomenon is also easy to occur, and danger is easy to occur. SUMMARY

[0003] The utility model provides a kind of pin shaft dismounting device, to solve the problem of low dismounting efficiency and low safety of caterpillar pin shaft of different mechanical equipment in prior art.

[0004] The utility model provides a kind of pin shaft dismounting device, pin shaft dismounting device includes: frame body;Lifting platform, movably set up on frame body, lifting platform can be lifted along vertical direction;Clamping assembly, it is set up on lifting platform, clamping assembly has clamping part, and clamping part is used to clamping fixed caterpillar;Ejector, it is set up on lifting platform, and the telescopic end of ejector corresponds clamping assembly setting, and ejector is used to eject pin shaft from caterpillar or top into caterpillar.

[0005] Further, the frame body includes: a mounting beam; legs, the legs are respectively arranged at both ends of the frame body along the length direction, the lifting platform is movably arranged on the legs, and the lifting platform is located below the mounting beam, a dismounting area is formed between the legs and the lifting platform, and the clamping part is located in the dismounting area.

[0006] Further, each leg includes two side plates, the two side plates are oppositely arranged along the width direction of the frame body, and a mounting area is formed between the two side plates, one end of the lifting platform is arranged in the mounting area of one leg, and the other end of the lifting platform is arranged in the mounting area of the other leg.

[0007] Further, the pin shaft dismounting device further comprises a driving motor, which is arranged on the mounting beam and is drivingly connected with the lifting platform, and is used to drive the lifting platform to move up and down on the frame body.

[0008] Further, the clamping assembly comprises a clamping driving member and a clamping plate, the clamping plate is movably arranged on the lifting platform along the length direction of the frame body, the telescopic end of the ejector has a matching part at one end, the matching part has a through hole, the telescopic end is arranged in the through hole, the clamping driving member is drivingly connected with the clamping plate to drive the clamping plate to move close to or away from the matching part, and the clamping plate is matched with the matching part to fix the track.

[0009] Further, the clamping plate has a dismounting hole, which is coaxially arranged with the telescopic end and is used to pass out the pin shaft.

[0010] Further, the lifting platform is provided with a storage hole, which is located on the side of the clamping plate away from the ejector, is coaxially arranged with the dismounting hole, and is used to place the pin shaft ejected by the track.

[0011] Further, the clamping driving member comprises a screw rod, which extends along the length direction of the frame body and is rotatably arranged on the lifting platform, an adjusting block which is threadedly connected with the screw rod and is moved along the length direction of the frame body by the screw rod, and a handle which is drivingly connected with the screw rod, is arranged on the lifting platform and is located on the outer side of the lifting platform, is located on the same side of the lifting platform as the ejector, and is provided with a limiting structure between the handle and the lifting platform, and the limiting structure is used to limit the axial movement of the handle on the screw rod.

[0012] Further, a guide structure is arranged between the supporting leg and the lifting platform, and is used to guide the lifting of the lifting platform.

[0013] Further, the supporting leg further comprises a bottom plate and a roller, the bottom plate is respectively connected with the bottom of the two side plates, and the roller is arranged on the bottom of the bottom plate.

[0014] According to the technical scheme of the utility model, the movable lifting platform is arranged on the frame body, the ejector is arranged on the lifting platform, the telescopic end of the ejector is arranged corresponding to the clamping assembly, and the pin shaft is ejected from the track or ejected into the track by the ejector. Through the above arrangement, the lifting platform and the ejector can correspond to the pin shafts at different height positions, so that the track pin shafts of different mechanical equipment can be dismounted, thereby improving the dismounting efficiency of the track pin shafts of different mechanical equipment, the clamping part of the clamping assembly can clamp and fix the track, so that the pin shaft dismounting device is more reliable and safe when dismounting the pin shafts of different mechanical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the pin assembly / disassembly device provided by this utility model is shown.

[0017] Figure 2 A cross-sectional structural schematic diagram of the lifting platform provided by this utility model is shown;

[0018] Figure 3 A cross-sectional structural diagram of the installation platform provided by this utility model is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Frame;

[0021] 11. Install the crossbeam;

[0022] 12. Support legs;

[0023] 121. Side panels;

[0024] 1211. Guiding structure;

[0025] 12111, Guide groove;

[0026] 12112, Guide rod;

[0027] 122. Base plate;

[0028] 123. Roller;

[0029] 13. Mounting bracket;

[0030] 20. Lifting platform;

[0031] 21. Storage hole;

[0032] 22. Connecting parts;

[0033] 23. Adjustment groove;

[0034] 30. Clamping assembly;

[0035] 31. Clamping drive component;

[0036] 311. Lead screw;

[0037] 312. Adjusting block;

[0038] 313. Handle;

[0039] 314. Limiting structure;

[0040] 32. Plywood;

[0041] 321. Disassembly hole;

[0042] 40. Ejector;

[0043] 41. Telescopic end;

[0044] 50. Drive motor. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0046] like Figure 1 As shown, this utility model embodiment provides a pin assembly / disassembly device, which includes: a frame 10, a lifting platform 20, a clamping assembly 30, and an ejector 40. The lifting platform 20 is movably mounted on the frame 10 and can rise and fall vertically. The clamping assembly 30 is mounted on the lifting platform 20 and has a clamping part for clamping and fixing the track. The ejector 40 is mounted on the lifting platform 20, and its telescopic end 41 corresponds to the clamping assembly 30. The ejector 40 is used to eject the pin from or into the track.

[0047] By applying the technical solution of this utility model, a movable lifting platform 20 is set on the frame 10, and an ejector 40 is set on the lifting platform 20. The telescopic end 41 of the ejector 40 is set corresponding to the clamping assembly 30, and the ejector 40 ejects the pin from or into the track. With the above arrangement, the lifting platform 20 and the ejector 40 can correspond to pins at different height positions, thereby disassembling and assembling the track pins of different mechanical equipment, thus improving the efficiency of disassembling and assembling the track pins of different mechanical equipment. The clamping part of the clamping assembly 30 can clamp and fix the track, making the pin disassembly and assembly device more reliable and safe when disassembling and assembling the pins of different mechanical equipment.

[0048] In the embodiments of this application, the ejector 40 is a cylinder. When the cylinder is started, it can drive the top shaft to gradually squeeze the pin, so that the pin can gradually slide out from inside the track under the action of the squeezing force. It can also push the pin into the track through this squeezing force, thereby completing the disassembly and assembly of the pin.

[0049] Furthermore, the frame 10 includes a mounting beam 11 and outriggers 12. The outriggers 12 are respectively located at both ends of the frame 10 along its length. A lifting platform 20 is movably mounted on the outriggers 12 and is located below the mounting beam 11. A disassembly / assembly area is formed between the outriggers 12 and the lifting platform 20, and the clamping part is located within this area. This arrangement provides a disassembly / assembly area for track installation and removal. The movement of the lifting platform 20 adapts to track installation and removal needs at different heights, improving the flexibility and versatility of the device. Especially in situations where tracked equipment has varying heights, it allows for rapid adjustment, improving work efficiency.

[0050] Specifically, such as Figure 1 and Figure 2 As shown, each support leg 12 includes two side plates 121, which are arranged opposite each other along the width direction of the frame 10, forming an installation area between them. One end of the lifting platform 20 passes through the installation area of ​​one support leg 12, and the other end of the lifting platform 20 passes through the installation area of ​​the other support leg 12. This arrangement makes the lifting platform 20 more stable during movement, reduces deviation caused by lateral forces, and improves the stability and safety of the device.

[0051] The pin assembly / disassembly device also includes a drive motor 50, which is mounted on the mounting beam 11 and is connected to the lifting platform 20. The drive motor 50 drives the lifting platform 20 to move up and down on the frame 10. Through this configuration, the drive motor 50 is connected to the lifting platform 20, enabling it to move up and down on the frame 10. This allows for precise control of the lifting platform 20's height, achieving accurate and efficient height adjustment, improving assembly / disassembly precision, and reducing the physical exertion of operators.

[0052] In the embodiments of this application, a mounting bracket 13 is also provided on the mounting beam 11, and the drive motor 50 is mounted on the mounting bracket 13, which enables the drive motor 50 to be more stably mounted on the mounting beam 11.

[0053] like Figure 2 As shown, the clamping assembly 30 includes a clamping drive 31 and a clamping plate 32. The clamping plate 32 is movably mounted on the lifting platform 20 along the length of the frame 10. One end of the ejector 40, containing the telescopic end 41, has a mating portion with a through hole. The telescopic end passes through the through hole. The clamping drive 31 is driven to move the clamping plate 32 closer to or away from the mating portion. The clamping plate 32 engages with the mating portion to secure the track. Through this arrangement, the clamping drive 31 drives the clamping plate 32 closer to or away from the mating portion, and the engagement of the clamping plate 32 with the mating portion firmly secures the track, ensuring stable assembly and disassembly.

[0054] In the embodiment of the present application, the fitting part is a pin shaft sleeve, one end of the pin shaft sleeve is sleeved on the telescopic end 41, and the other end abuts against the track support. In this way, during the process of the telescopic end 41 being lifted by the pin shaft, the telescopic end 41 and the pin shaft are always in the pin shaft sleeve, so that the pin shaft sleeve plays a guiding role during the process of the telescopic end 41 being lifted by the pin shaft, and the deviation of the telescopic end 41 and the pin shaft from alignment can be prevented, and the reliability and safety of the device can be improved.

[0055] Further, the clamping plate 32 has a dismounting hole 321 coaxially arranged with the telescopic end 41, and the dismounting hole 321 is used for the pin shaft to pass out. Through the above arrangement, the dismounting hole 321 can provide space for the pin shaft lifted out by the telescopic end 41 of the ejector 40.

[0056] Specifically, the lifting platform 20 is provided with a storage hole 21 located on the side of the clamping plate 32 away from the ejector 40, and the storage hole 21 is coaxially arranged with the dismounting hole 321 and is used for placing the pin shaft lifted by the track. Through the above arrangement, the storage hole 21 is coaxially arranged with the dismounting hole 321, the telescopic end 41 of the ejector 40 lifts the pin shaft in the track, first passes through the dismounting hole 321, and then enters the storage hole 21 for storage. In this way, the dismounted pin shaft can be effectively collected, the pin shaft can be prevented from scattering, the neatness of the work site is improved, the loss of the pin shaft is reduced, and the daily maintenance and repair work of the track equipment can be facilitated.

[0057] Further, the clamping driving member 31 comprises a screw rod 311, an adjusting block 312 and a handle 313. The screw rod 311 extends along the length direction of the rack body 10, and is rotatably arranged on the lifting platform 20. The adjusting block 312 is threadedly connected with the screw rod 311, the screw rod 311 drives the adjusting block 312 to move along the length direction of the rack body 10, and the clamping plate 32 is arranged on the adjusting block 312. The handle 313 is drivingly connected with the screw rod 311, the handle 313 is arranged on the lifting platform 20 and located outside the lifting platform 20, the handle 313 and the ejection machine 40 are located on the same side of the lifting platform 20, and a limiting structure 314 is arranged between the handle 313 and the lifting platform 20, and the limiting structure 314 is used for limiting the axial movement of the handle 313 relative to the screw rod 311. Through the above arrangement, the handle 313 is used for driving the screw rod 311 to rotate in the inside of the adjusting groove 23, when the maintenance personnel controls the handle 313 to rotate, the screw rod 311 will synchronously rotate with the handle 313, so that the adjusting block 312 can slide horizontally in the adjusting groove 23 under the action of the screw rod 311, so that the clamping plate 32 is attached to one side of the track, and lateral displacement of the track during operation is prevented. The worker directly operates the handle 313 to move the position of the adjusting block 312 on the screw rod 311, the handle 313 synchronously rotates with the screw rod 311, and the adjusting block 312 drives the clamping plate 32 to move, which is not only simple and convenient to operate, but also can accurately adjust the position of the clamping plate 32, and improve the disassembly and assembly precision.

[0058] In the embodiment of the present application, the adjusting groove 23 is arranged on the lifting platform 20, and the screw rod 311 and the adjusting block 312 are arranged in the adjusting groove 23. Since the adjusting block 312 cannot rotate with the screw rod 311 under the limitation of the inner wall of the adjusting groove 23, the adjusting block 312 will slide horizontally along the screw rod 311 in the inside of the adjusting groove 23.

[0059] In addition, the limiting structure 314 can synchronously rotate with the screw rod 311, and under the action of the limiting block of the limiting structure 314, the handle 313 as a whole cannot slide out from the inside of the lifting platform 20, so that the handle 313 is prevented from accidentally sliding from the inside of the lifting platform 20.

[0060] As shown in Figure 2 The guide structure 1211 is arranged between the supporting leg 12 and the lifting platform 20, and is used for guiding the lifting of the lifting platform 20.

[0061] In the embodiment of the present application, as shown in Figure 3As shown, the guide structure 1211 is arranged on the side plate 121, and the guide structure 1211 comprises a guide groove 12111 and a guide rod 12112. The guide rod 12112 is fixedly connected to the inner side of the guide groove 12111. In addition, the connecting piece 22 is arranged on the lifting platform 20, and the connecting piece 22 is fixedly arranged on the lifting platform 20. The connecting piece 22 is internally provided with a through groove matched with the cross-sectional dimension of the guide rod 12112, so that the lifting platform 20 can slide up and down on the guide rod 12112 through the connecting piece 22, so that the ejector 40 of the device can be aligned with the track pin shaft of different equipment, and the disassembly efficiency of the track pin shaft of different mechanical equipment is improved. In addition, the arrangement of the guide structure 1211 and the connecting piece 22 can ensure the stability of the lifting platform during lifting, reduce the disassembly failure caused by the shaking of the lifting platform, and improve the safety and efficiency of the operation.

[0062] As shown in the figure, Figure 1 The leg 12 further comprises a bottom plate 122 and a roller 123, and the bottom plate 122 is connected to the bottom of the two side plates 121 respectively, and the roller 123 is arranged at the bottom of the bottom plate 122. Through the above arrangement, the entire pin shaft disassembly device can be conveniently moved to the position of the mechanical equipment to be disassembled, and the pin shaft disassembly device can be more conveniently adjusted in direction, thereby providing great flexibility, reducing equipment downtime, and improving overall maintenance efficiency.

[0063] The working principle and use process of the utility model are as follows: when the pin shaft needs to be disassembled, first, the device is moved to the vicinity of the track where the pin shaft needs to be disassembled, so that the track is located in the disassembly area, then the driving motor 50 is started to control the lifting platform 20 to slide up and down on the guide structure 1211, so that the pin shaft to be disassembled is located in the disassembly area of the lifting platform 20, and one end of the pin shaft is aligned with the disassembly hole 321 in the middle of the clamping plate 32, and the other end of the pin shaft is aligned with the telescopic end 41 of the ejector 40. Then, the handle 313 is rotated to drive the clamping plate 32 to move horizontally, so that the clamping plate 32 can be tightly combined with one side of the track link section, and the other side of the track link section is combined with the matching part of the ejector 40. At this time, the ejector 40 is started to drive the telescopic end 41 to move to the pin shaft, so that the pin shaft is gradually pushed into the disassembly hole 321 and the storage hole 21 in the lifting platform 20, that is, the pin shaft disassembly work is completed.

[0064] When the installation operation of the pin shaft is needed, the device as a whole is moved to enable one side of the track link to be attached to one side of the clamping plate 32, at this time, the matching part corresponding to the size of the track pin shaft is installed on the telescopic end 41 of the ejector 40, then the pin shaft to be installed is inserted into the inside of the matching part, and the height position of the lifting platform 20 is adjusted by the driving motor 50 to enable the other end of the pin shaft to be aligned with the pin shaft hole on the track link, at this time, the telescopic end 41 and the pin shaft connected with the telescopic end 41 are driven to gradually move to the inside of the pin shaft hole by starting the ejector 40, and the pin shaft is gradually ejected into the inside of the track link, so that the installation operation of the pin shaft can be completed.

[0065] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0066] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience in description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail because such techniques, methods, and devices are considered to be part of the instant application. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example, and not as a limitation. Thus, other examples of the example embodiments can have different values. It is to be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0067] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0068] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0069] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0070] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pin dismounting device, characterized in that The pin assembly / disassembly device includes: Frame (10); A lifting platform (20) is movably mounted on the frame (10), and the lifting platform (20) can be raised and lowered in the vertical direction; A clamping assembly (30) is disposed on the lifting platform (20). The clamping assembly (30) has a clamping part for clamping and fixing the track. An ejector (40) is installed on the lifting platform (20). The telescopic end of the ejector (40) is provided corresponding to the clamping assembly (30). The ejector (40) is used to eject the pin from or into the track.

2. The pin removal device of claim 1, wherein, The frame (10) includes: Install the crossbeam (11); The support legs (12) are respectively disposed at both ends of the frame (10) along the length direction. The lifting platform (20) is movably disposed on the support legs (12) and the lifting platform (20) is located below the mounting beam (11). A disassembly and assembly area is formed between the support legs (12) and the lifting platform (20). The clamping part is located in the disassembly and assembly area.

3. The pin removal device of claim 2, wherein, Each of the outriggers (12) includes two side plates (121), which are arranged opposite each other along the width direction of the frame (10) and form an installation area between the two side plates (121). One end of the lifting platform (20) passes through the installation area of ​​one outrigger (12), and the other end of the lifting platform (20) passes through the installation area of ​​the other outrigger (12).

4. The pin assembly / disassembly device according to claim 2, characterized in that, The pin assembly / disassembly device also includes a drive motor (50), which is mounted on the mounting beam (11). The drive motor (50) is connected to the lifting platform (20) and is used to drive the lifting platform (20) to move up and down on the frame (10).

5. The pin assembly / disassembly device according to claim 1, characterized in that, The clamping assembly (30) includes a clamping drive (31) and a clamping plate (32). The clamping plate (32) is movably disposed on the lifting platform (20) along the length direction of the frame (10). The telescopic end (41) of the ejector (40) has a mating part. The mating part has a through hole. The telescopic end passes through the through hole. The clamping drive (31) is driven to connect with the clamping plate (32) to drive the clamping plate (32) to move closer to or away from the mating part. The clamping plate (32) cooperates with the mating part to fix the track.

6. The pin assembly / disassembly device according to claim 5, characterized in that, The clamp (32) has a disassembly hole (321), which is coaxially arranged with the telescopic end (41) and is used for the pin to pass through.

7. The pin assembly / disassembly device according to claim 6, characterized in that, The lifting platform (20) is provided with a storage hole (21). The storage hole (21) is located on the side of the clamping plate (32) away from the ejector (40). The storage hole (21) is coaxially arranged with the disassembly hole (321). The storage hole (21) is used to place the pin ejected by the track.

8. The pin assembly / disassembly device according to claim 5, characterized in that, The clamping drive (31) includes: A lead screw (311) extends along the length of the frame (10) and is rotatably mounted on the lifting platform (20); An adjusting block (312) is threadedly connected to the lead screw (311). The lead screw (311) drives the adjusting block (312) to move along the length of the frame (10). The clamping plate (32) is disposed on the adjusting block (312). A handle (313) is driven and connected to the lead screw (311). The handle (313) passes through the lifting platform (20) and is located on the outside of the lifting platform (20). The handle (313) and the ejector (40) are located on the same side of the lifting platform (20). A limit structure (314) is provided between the handle (313) and the lifting platform (20). The limit structure (314) is used to limit the axial movement of the handle (313) on the lead screw (311).

9. The pin assembly / disassembly device according to claim 2, characterized in that, A guide structure (1211) is provided between the support leg (12) and the lifting platform (20), and the guide structure (1211) is used to guide the lifting of the lifting platform (20).

10. The pin assembly / disassembly device according to claim 3, characterized in that, The support leg (12) also includes a base plate (122) and rollers (123). The base plate (122) is connected to the bottom of the two side plates (121) respectively, and the rollers (123) are disposed at the bottom of the base plate (122).

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