A latch disassembly device

Abstract

The application relates to the technical field of disassembling tools, and discloses a bolt dismounting device which comprises a support, a sliding piece, a lead screw, a gear set and a driving mechanism. Specifically, the support is provided with a guide assembly, the guide direction of the guide assembly is parallel to the axial direction of the bolt; the sliding piece is slidingly arranged on the guide assembly, the sliding piece is provided with a connecting part and a transmission part, the transmission part is provided with a threaded hole, and the connecting part is suitable for being connected with the bolt; the lead screw is rotationally connected to the support and extends along the guide direction, and the lead screw is in transmission connection with the transmission part through the threaded hole; the gear set is rotationally connected to the support, and the gear set can adjust the gear ratio; and the driving mechanism is arranged on the support and is in transmission connection with the lead screw through the gear set. The bolt dismounting device disclosed by the application solves or improves the problems that it is laborious and the working efficiency is low when the bolt is dismounted.

Description

Technical Field

[0001] This application relates to the field of disassembly and assembly tools, specifically to a pin disassembly device. Background Technology

[0002] Many components or mechanisms on a truck crane are connected by pins. To meet the needs of machine transport, large machines are transported in pieces and then reassembled upon arrival at the destination. Disassembling the pins by manually hammering them is relatively difficult.

[0003] In related technologies, hydraulic cylinders are used to remove pins, but the cylinders are quite long and require a fixed bracket to be fixed to the machine. When there are many pins on the machine, the efficiency is low.

[0004] In related technologies, a pin puller is used to pull out pins. First, a bolt is coaxially connected to the end of the pin shaft. The pin puller is equipped with a sliding slider with a slot for engaging the bolt head. The bolt head is engaged with the pin puller, and the slider is pulled by rotating the lead screw of the pin puller to remove the pin shaft. However, some parts are tightly connected, making disassembly difficult and resulting in low work efficiency. Utility Model Content This application provides a pin removal device to solve or improve the problem of laborious and inefficient pin removal.

[0005] This application provides a pin removal device, comprising: The bracket is provided with a guide assembly, the guide direction of which is parallel to the axis of the pin; A sliding member is slidably disposed on the guide assembly. The sliding member has a connecting part and a transmission part. The transmission part has a threaded hole, and the connecting part is adapted to be connected with a pin. A lead screw is rotatably connected to the bracket and extends along the guide direction; the lead screw is connected to the transmission part through the threaded hole. A gear set is rotatably connected to the bracket, and the gear set is capable of adjusting the gear ratio; A drive mechanism is mounted on the bracket, and the drive mechanism is connected to the lead screw via the gear set.

[0006] In this embodiment, the slider slides along a guide direction parallel to the axial direction of the pin. After the connecting part on the slider is connected to the pin, driving the slider to move pulls the pin and removes it from the pin hole. The threaded drive of the lead screw and the slider, combined with the guide assembly, ensures that the pulling force direction is strictly parallel to the pin axial direction, preventing misalignment and damage to components during disassembly. The drive mechanism drives the lead screw to rotate via a gear set. The lead screw is threadedly connected to the threaded hole of the transmission part. Under the action of the guide assembly, the slider can only move along the guide direction and cannot rotate along the axial direction of the lead screw. The rotation of the lead screw drives the slider to move along the guide direction, thus removing the pin from the pin hole.

[0007] The gear set allows for adjustable gear ratios, enabling the device to flexibly adjust output torque based on the resistance encountered during pin removal. This reduces the output power of the drive mechanism, making pin removal easier and improving work efficiency. The drive mechanism indirectly drives the lead screw via the gear set, enhancing transmission smoothness and controllability. It is suitable for removing pins of various sizes and installation environments, significantly improving work efficiency.

[0008] In one alternative embodiment, the gear set includes: The first gear is mounted on the drive shaft of the drive mechanism; The second gear is mounted on the lead screw and is connected to the first gear in a transmission manner. The number of teeth on the second gear is greater than the number of teeth on the first gear.

[0009] In one alternative embodiment, the support includes: A first connecting plate and a second connecting plate are arranged opposite to each other and spaced apart along the guide direction. The first connecting plate has a first through hole corresponding to the connecting part. The guiding assembly includes at least two light rods, which are disposed between the first connecting plate and the second connecting plate, with their two ends respectively connected to the first connecting plate and the second connecting plate.

[0010] In one alternative embodiment, the support further includes: The third connecting plate is connected to the second connecting plate via a support rod. The third connecting plate is located on the side of the second connecting plate away from the first connecting plate. An installation gap is formed between the third connecting plate and the second connecting plate. The gear set is disposed within the installation gap. A third through hole is provided on the third connecting plate, and a second through hole is provided on the second connecting plate. The third through hole and the second through hole are correspondingly arranged along the guide direction. The drive shaft of the drive mechanism passes through the third through hole and is rotatably connected to the inner walls of the third through hole and the second through hole.

[0011] In one alternative embodiment, the center hole of the first gear is polygonal; The drive shaft is provided with a first transmission section, a first connecting section, a second transmission section and a second connecting section in sequence along its axial direction. The first transmission section is adapted to be connected to the power device for transmission, and the first connecting section is a cylinder and is rotatably connected to the inner wall of the third through hole. The second transmission section is a prism, which is adapted to the center hole of the first gear. The second connecting section is a cylinder and is rotatably connected to the inner wall of the second through hole.

[0012] In one optional embodiment, there are two lead screws and two second gears, with the second gears connected to the two lead screws respectively, and the first gear being drivenly connected to the two second gears.

[0013] In one optional embodiment, the sliding member is a sliding plate, the sliding plate is provided with at least two sliding holes, the sliding holes are correspondingly provided with the light rod, and the sliding plate is slidably connected to the light rod through the sliding holes.

[0014] In one optional embodiment, the connecting portion includes: A snap-fit ​​hole is provided on the sliding plate. The snap-fit ​​hole includes a through portion and a snap-fit ​​portion that are connected. Along the projection surface perpendicular to the guide direction, the projection area of ​​the through portion is S1, and the projection area of ​​the snap-fit ​​portion is S2. A connector includes a connecting rod and a connector head. One end of the connecting rod is fixedly connected to the connector head, and the other end of the connecting rod is adapted to be connected to the pin. Along a projection plane perpendicular to the guide direction, the projected area of ​​the connecting rod is S3, and the projected area of ​​the connector head is S4, wherein S3 < S2 < S4 < S1.

[0015] In one optional embodiment, the snap-fit ​​portion corresponding to the portion of the sliding plate is provided with a limiting groove, and the connector is disposed within the limiting groove.

[0016] In one alternative embodiment, the transmission unit includes: Mounting holes are provided on the sliding plate; A nut is fixed in the mounting hole, the nut having the threaded hole, and the lead screw is threadedly connected to the nut. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a pin removal device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the second connecting plate and gear set in a pin removal device according to an embodiment of this application; Figure 3 This is a schematic diagram of the sliding component in a pin removal device according to an embodiment of this application; Figure 4 This is a schematic diagram of the connection between the connector and the pin in a pin removal device according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a pin removal device according to an embodiment of this application when the pin connection is completed; Figure 6 This is a schematic diagram of the structure of a pin removal device according to an embodiment of this application during the process of pulling out a pin; Figure 7 This is a diagram showing the installation of a pin in mechanical equipment.

[0019] Explanation of reference numerals in the attached figures: 1. Bracket; 101. First connecting plate; 1011. First through hole; 102. Second connecting plate; 1021. Fixing hole; 103. Support rod; 104. Third connecting plate; 2. Guide assembly; 201. Smooth rod; 3. Sliding member; 301. Connecting part; 3011. Snap-fit ​​hole; 30111. Through part; 30112. Snap-fit ​​part; 3012. Connecting member; 30121. Connecting rod; 30122. Connecting head; 3013. Limiting groove; 302. Transmission part; 3021. Mounting hole; 303. Sliding hole; 4. Lead screw; 5. Gear set; 501. First gear; 5011. Center hole; 502. Second gear; 6. Drive shaft; 601. First transmission section; 602. First connecting section; 7. Installation gap; 8. Pin; 801. Connecting hole; X, guide direction. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Many components or mechanisms on a truck crane are connected by pins. To meet the needs of machine transport, large machines are transported in pieces and then reassembled upon arrival at the destination. Disassembling the pins by manually hammering them is relatively difficult.

[0022] In related technologies, hydraulic cylinders are used to remove pins, but the cylinders are quite long and require a fixed bracket to be fixed to the machine. When there are many pins on the machine, the efficiency is low.

[0023] In related technologies, a pin puller is used to remove pins. First, a bolt is coaxially connected to the end of the pin shaft. The pin puller is equipped with a sliding slider with a groove for engaging the bolt head. The bolt head is engaged with the pin puller, and the slider is pulled by rotating the lead screw of the pin puller to remove the pin shaft. However, some parts are tightly connected, making disassembly laborious and resulting in low work efficiency. Therefore, this application provides a pin removal device to solve or improve the problem of laborious and inefficient pin removal.

[0024] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0025] According to embodiments of this application, in one aspect, a pin removal device is provided, such as... Figure 1 , Figure 2 and Figure 4 As shown, the device includes a bracket 1, a sliding member 3, a lead screw 4, a gear set 5, and a drive mechanism. Specifically, the bracket 1 is provided with a guide assembly 2, the guide direction X of which is parallel to the axial direction of the pin 8; the sliding member 3 is slidably disposed on the guide assembly 2, and the sliding member 3 is provided with a connecting part 301 and a transmission part 302. The transmission part 302 has a threaded hole, and the connecting part 301 is adapted to connect with the pin 8; the lead screw 4 is rotatably connected to the bracket 1 and extends along the guide direction X, and the lead screw 4 is connected to the transmission part 302 through the threaded hole; the gear set 5 is rotatably connected to the bracket 1, and the gear set 5 can adjust the gear ratio; the drive mechanism is disposed on the bracket 1, and the drive mechanism is connected to the lead screw 4 through the gear set 5.

[0026] In this embodiment, such as Figure 1 , Figure 5 and Figure 6As shown, the slider 3 slides along the guide direction X, which is parallel to the axial direction of the pin 8. After the connecting part 301 on the slider 3 is connected to the pin 8, driving the slider 3 to move can pull the pin 8 and pull it out of the pin hole. The threaded transmission between the lead screw 4 and the slider 3, in conjunction with the guide assembly 2, ensures that the pulling force direction is strictly parallel to the axial direction of the pin 8, preventing misalignment and damage to the parts during disassembly. The drive mechanism drives the lead screw 4 to rotate through the gear set 5. The lead screw 4 is threadedly connected to the threaded hole of the transmission part 302. Under the action of the guide assembly 2, the slider 3 can only move along the guide direction X and cannot rotate along the axial direction of the lead screw. The rotation of the lead screw 4 can drive the slider 3 to move along the guide direction X, thus pulling the pin 8 out of the pin hole.

[0027] like Figure 2 As shown, the gear set 5 can adjust the gear ratio, allowing the device to flexibly adjust the output torque according to the resistance of disassembling the pin 8, reducing the output power of the drive mechanism, making it easier to disassemble the pin 8 and improving work efficiency. The drive mechanism indirectly drives the lead screw 4 through the gear set 5, improving the smoothness and controllability of the transmission, making it suitable for disassembling pins 8 of various sizes and installation environments, and significantly improving work efficiency.

[0028] Specifically, the drive mechanism can be an electric drill or a manual operation using a wrench to rotate the gear set 5.

[0029] In one embodiment, such as Figure 2 As shown, the gear set 5 includes a first gear 501 and a second gear 502. The first gear 501 is mounted on the drive shaft 6 of the drive mechanism; the second gear 502 is mounted on the lead screw 4 and is connected to the first gear 501 in a transmission connection. The number of teeth of the second gear 502 is greater than the number of teeth of the first gear 501.

[0030] In this embodiment, the gear set 5 uses a first gear 501 meshing with a second gear 502, and the second gear 502 has more teeth than the first gear 501, forming a speed reduction and torque amplification transmission. This structure can reduce the output speed of the drive mechanism and increase the torque, so that when disassembling the pin 8 with high resistance, the operator or external power device only needs to provide a small input force to generate a large output pulling force, further enhancing the labor-saving effect of the device, and is especially suitable for disassembling tightly connected and severely corroded pins 8.

[0031] In one embodiment, such as Figure 1As shown, the bracket 1 includes a first connecting plate 101 and a second connecting plate 102. The first connecting plate 101 and the second connecting plate 102 are arranged opposite to each other and spaced apart along the guide direction X. The first connecting plate 101 has a first through hole 1011 corresponding to the connecting part 301. The guide component 2 includes at least two light rods 201. The two light rods 201 are arranged between the first connecting plate 101 and the second connecting plate 102. The two ends of the two light rods 201 are respectively connected to the first connecting plate 101 and the second connecting plate 102.

[0032] In this embodiment, the two guide rods 201 act as guide components 2, cooperating with the sliding member 3 to effectively limit the sliding member 3 to move only along the axial direction, preventing it from rotating or swaying, thus ensuring the linearity and stability of the tension. The first through hole 1011 on the first connecting plate 101 is used for the pin 8 or the connector 3012 to pass through, which has a simple structure, high guiding accuracy, and improves the reliability and safety of the disassembly process.

[0033] In one embodiment, such as Figure 1 The bracket 1 further includes a third connecting plate 104, which is connected to the second connecting plate 102 via a support rod 103. The third connecting plate 104 is located on the side of the second connecting plate 102 away from the first connecting plate 101. An installation gap 7 is formed between the third connecting plate 104 and the second connecting plate 102. The gear set 5 is disposed within the installation gap 7. A third through hole is provided on the third connecting plate 104, and a second through hole is provided on the second connecting plate 102. The third through hole and the second through hole are correspondingly arranged along the guide direction X. The drive shaft 6 of the drive mechanism passes through the third through hole and is rotatably connected to the inner walls of the third through hole and the second through hole.

[0034] In this embodiment, by adding a third connecting plate 104 and forming an installation gap 7 with the second connecting plate 102, an independent, compact, and protected installation space is provided for the gear set 5, avoiding external interference. The drive shaft 6 achieves two-point support rotation through the third and second through holes, which greatly improves the rigidity and operational smoothness of the drive shaft 6 and the entire transmission system, reduces vibration and wear, and extends the service life of the device.

[0035] Specifically, bearings are provided between the drive shaft 6 and the third and second through holes.

[0036] In one embodiment, such as Figure 1 and Figure 2As shown, the center hole 5011 of the first gear 501 is polygonal; the drive shaft 6 is provided with a first transmission section 601, a first connecting section 602, a second transmission section and a second connecting section in sequence along its axial direction. The first transmission section 601 is suitable for transmission connection with the power device, the first connecting section 602 is cylindrical and rotatably connected to the inner wall of the third through hole; the second transmission section is prism, the second transmission section is adapted to the center hole 5011 of the first gear 501, and the second connecting section is cylindrical and rotatably connected to the inner wall of the second through hole.

[0037] In this embodiment, such as Figure 1 and Figure 2 As shown, the segmented design of the drive shaft 6 has a clear function. The first transmission segment 601 connects to the power source, the first connecting segment 602 achieves a rotatable connection with the bracket 1, and the third through hole supports the first connecting segment 602. The second transmission segment adopts a prism structure and cooperates with the polygonal center hole 5011 of the first gear 501, realizing reliable power transmission without relative rotation and avoiding complex structures such as keyed connections; the second connecting segment provides an additional rotational support point. This design simplifies assembly, ensures transmission efficiency, and has strong overload resistance.

[0038] In one embodiment, such as Figure 1 and Figure 2 As shown, there are two lead screws 4 and two second gears 502. The second gears 502 are connected to the two lead screws 4 respectively, and the first gear 501 is connected to the two second gears 502 in a transmission connection.

[0039] In this embodiment, a design employing double lead screws 4 and double second gears 502 is used, driven simultaneously by a single first gear 501. This symmetrically arranged transmission method ensures that the pulling force is evenly applied to the sliding member 3, effectively preventing jamming or uneven wear of the sliding member 3 when subjected to force on one side, thus guaranteeing a smooth and stable sliding process. Simultaneously, the double lead screw structure enhances the overall load-bearing capacity and structural rigidity of the device, making it suitable for heavy-duty pins 8 requiring greater disassembly force.

[0040] In one embodiment, such as Figure 3 As shown, the sliding member 3 is a sliding plate, and the sliding plate is provided with at least two sliding holes 303. The sliding holes 303 are correspondingly provided with the light rod 201, and the sliding plate is slidably connected to the light rod 201 through the sliding holes 303.

[0041] In this embodiment, the sliding member 3 is specifically embodied as a sliding plate, and a sliding hole 303 corresponding to the guide rod 201 is formed. The plate structure is easy to process, has high strength, and a large force-bearing area. The sliding fit between the sliding hole 303 and the guide rod 201 results in low frictional resistance, smooth movement, and easy maintenance of parallelism between multiple guide points, further improving guiding accuracy and movement stability.

[0042] Specifically, a sliding bearing can be installed inside the sliding hole 303, with the outer ring of the bearing connected to the inner wall of the sliding hole 303 and the inner ring of the bearing connected to the smooth rod 201.

[0043] In one embodiment, such as Figure 3 and Figure 4 As shown, the connecting part 301 includes a snap-fit ​​hole 3011 and a connector 3012. Specifically, the snap-fit ​​hole 3011 is provided on the sliding plate. The snap-fit ​​hole 3011 includes a through part 30111 and a snap-fit ​​part 30112 that are connected to each other. Along the projection plane perpendicular to the guide direction X, the projection area of ​​the through part 30111 is S1, and the projection area of ​​the snap-fit ​​part 30112 is S2. The connector 3012 includes a connecting rod 30121 and a connector head 30122. One end of the connecting rod 30121 is fixedly connected to the connector head 30122, and the other end of the connecting rod 30121 is adapted to be connected to the pin 8. Along the projection plane perpendicular to the guide direction X, the projection area of ​​the connecting rod 30121 is S3, and the projection area of ​​the connector head 30122 is S4, wherein S3 < S2 < S4 < S1.

[0044] In this embodiment, one end of the connecting rod 30121 is connected to the pin 8 by welding or by a locking device. The projected area of ​​the connector 30122 is smaller than the projected area S1 of the through portion 30111. Therefore, the connector 30122 passes through the through portion 30111 and moves the position of the sliding plate so that the connector 30122 corresponds to the locking portion 30112. The projected area of ​​the connector 30122 is larger than the projected area S2 of the locking portion 30112. Therefore, the locking portion 30112 can restrict the connector 30122 from disengaging from the sliding plate.

[0045] The projected area S3 of the connecting rod 30121 is smaller than the projected area S2 of the snap-fit ​​part 30112. Therefore, the connecting rod 30121 can move within the snap-fit ​​part 30112 to adjust the position of the connector 30122 corresponding to the snap-fit ​​hole 3011. This facilitates the assembly and disassembly of the connector 3012 and the snap-fit ​​hole 3011, making the connection and separation of the connector 30122 and the snap-fit ​​hole 3011 more convenient and improving work efficiency.

[0046] In some embodiments, such as Figure 7 As shown, the center of the pin 8 is generally provided with a connecting hole 801. The inner wall of the connecting hole 801 is provided with threads. The connecting part 3012 is a bolt. The bolt is threadedly connected to the connecting hole 801 of the pin 8. The snap-fit ​​part 30112 can snap-fit ​​with the bolt.

[0047] The connecting portion 301 adopts a snap-fit hole 3011 with a special shape to cooperate with the connecting member 3012. Through the area relationship design of S3<S2<S4<S1, lateral insertion of the connecting head 30122 and axial limiting are realized. During disassembly, the connecting head 30122 is limited by the snap-fit portion 30112, so that the tensile force can be stably transmitted; during installation, it is only necessary to laterally move the connecting head 30122 from the penetrating portion 30111 into the snap-fit portion 30112, without screwing or other complex operations.

[0048] In one embodiment, as shown in Figure 3 , the portion of the snap-fit portion 30112 corresponding to the sliding plate is provided with a limiting groove 3013, and the connecting head 30122 is disposed in the limiting groove 3013.

[0049] In this embodiment, the limiting groove 3013 is provided in the snap-fit portion 30112, so that the connecting head 30122 is embedded therein, which can not only transmit the axial tensile force, but also limit the radial movement and rotation of the connecting head 30122 within the snap-fit portion 30112, avoiding unnecessary collision, wear or displacement between the connecting head 30122 and the sliding plate during the force-bearing process, ensuring a direct and stable force transmission path, and improving the reliability and durability of the connection.

[0050] In one embodiment, the transmission portion 302 includes a mounting hole 3021 and a nut. The mounting hole 3021 is disposed on the sliding plate; the nut is fixed in the mounting hole 3021, the nut has a threaded hole, and the lead screw 4 is in threaded connection with the nut.

[0051] In this embodiment, a stable internal thread is formed after the nut is fixed, which meshes with the lead screw 4 to efficiently and accurately convert the rotational motion of the lead screw 4 into the linear motion of the sliding plate. This split design facilitates the selection, replacement and maintenance of the nut, and also reduces the overall processing difficulty and cost of the sliding plate.

[0052] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the appended present application.

Claims

1. A pin removal device, characterized in that, include: The bracket (1) is provided with a guide component (2), the guide direction (X) of which is parallel to the axis of the pin (8); A sliding member (3) is slidably disposed on the guide assembly (2). The sliding member (3) is provided with a connecting part (301) and a transmission part (302). The transmission part (302) is provided with a threaded hole. The connecting part (301) is adapted to be connected to the pin (8). The lead screw (4) is rotatably connected to the bracket (1) and extends along the guide direction (X). The lead screw (4) is connected to the transmission part (302) through the threaded hole. Gear set (5) is rotatably connected to the bracket (1), and the gear set (5) is capable of adjusting the gear ratio; The drive mechanism is mounted on the bracket (1) and is connected to the lead screw (4) via the gear set (5).

2. The pin removal device according to claim 1, characterized in that, The gear set (5) includes: The first gear (501) is mounted on the drive shaft (6) of the drive mechanism; The second gear (502) is mounted on the lead screw (4). The second gear (502) is connected to the first gear (501) in a transmission manner. The number of teeth of the second gear (502) is greater than the number of teeth of the first gear (501).

3. The pin removal device according to claim 2, characterized in that, The support (1) includes: A first connecting plate (101) and a second connecting plate (102) are arranged opposite to each other and spaced apart along the guide direction (X). The first connecting plate (101) has a first through hole (1011) corresponding to the connecting part (301). The guide assembly (2) includes at least two light rods (201), which are disposed between the first connecting plate (101) and the second connecting plate (102), and the two ends of the two light rods (201) are respectively connected to the first connecting plate (101) and the second connecting plate (102).

4. The pin removal device according to claim 3, characterized in that, The support (1) further includes: The third connecting plate (104) is connected to the second connecting plate (102) via a support rod (103). The third connecting plate (104) is located on the side of the second connecting plate (102) away from the first connecting plate (101). An installation gap (7) is formed between the third connecting plate (104) and the second connecting plate (102). The gear set (5) is disposed in the installation gap (7). A third through hole is provided on the third connecting plate (104), and a second through hole is provided on the second connecting plate (102). The third through hole and the second through hole are correspondingly arranged along the guide direction (X). The drive shaft (6) of the drive mechanism passes through the third through hole and is rotatably connected to the inner walls of the third through hole and the second through hole.

5. The pin removal device according to claim 4, characterized in that, The center hole (5011) of the first gear (501) is polygonal; The drive shaft (6) is provided with a first transmission section (601), a first connecting section (602), a second transmission section and a second connecting section in sequence along its axial direction. The first transmission section (601) is adapted to be connected to the power device for transmission, and the first connecting section (602) is a cylinder and is rotatably connected to the inner wall of the third through hole. The second transmission section is a prism, which is adapted to the center hole (5011) of the first gear (501). The second connecting section is a cylinder and is rotatably connected to the inner wall of the second through hole.

6. The pin removal device according to claim 2, characterized in that, Two lead screws (4) are provided, and two second gears (502) are provided. The second gears (502) are respectively connected to the two lead screws (4), and the first gear (501) is connected to the two second gears (502) in a transmission connection.

7. The pin removal device according to claim 3, characterized in that, The sliding member (3) is a sliding plate, and at least two sliding holes (303) are provided on the sliding plate. The sliding holes (303) are corresponding to the light rod (201), and the sliding plate is slidably connected to the light rod (201) through the sliding holes (303).

8. The pin removal device according to claim 7, characterized in that, The connecting part (301) includes: A snap-fit ​​hole (3011) is provided on the sliding plate. The snap-fit ​​hole (3011) includes a through portion (30111) and a snap-fit ​​portion (30112) that are connected to each other. Along the projection plane perpendicular to the guide direction (X), the projection area of ​​the through portion (30111) is S1, and the projection area of ​​the snap-fit ​​portion (30112) is S2. The connector (3012) includes a connecting rod (30121) and a connector (30122). One end of the connecting rod (30121) is fixedly connected to the connector (30122), and the other end of the connecting rod (30121) is adapted to be connected to the pin (8). Along the projection plane perpendicular to the guide direction (X), the projection area of ​​the connecting rod (30121) is S3, and the projection area of ​​the connector (30122) is S4, wherein S3 < S2 < S4 < S1.

9. The pin removal device according to claim 8, characterized in that, The snap-fit ​​part (30112) is provided with a limiting groove (3013) corresponding to the sliding plate, and the connector (30122) is disposed in the limiting groove (3013).

10. The pin removal device according to claim 7, characterized in that, The transmission unit (302) includes: Mounting hole (3021) is provided on the sliding plate; A nut is fixed in the mounting hole (3021), the nut has the threaded hole, and the lead screw (4) is threadedly connected to the nut.

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