A hydraulic pin puller apparatus and method of use

Abstract

The application relates to the technical field of hydraulic plug-in pin shafts, in particular to a hydraulic plug-in pin shaft device and a use method thereof; the device comprises a pin shaft hole formed in the side surface of a connecting frame, an installation groove is formed in the inner wall of the pin shaft hole, a limiting gear and a rotating plate are movably arranged on the inner wall of the installation groove, a screw rod is movably arranged in the pin shaft, a push rod is movably arranged at the end of the screw rod, an extrusion block is fixed to the end of the push rod, a receiving groove is formed in the inner part of the end of the pin shaft, and a tooth block is movably arranged on the inner wall of the receiving groove; the beneficial effect is that when the pin shaft is outwardly displaced due to friction at the connecting position of the bearing block and the connecting frame, the limiting gear rotates clockwise, the lower end of the rotating plate is driven to rotate counterclockwise by the clockwise rotation of the limiting gear, the upper end of the rotating plate is blocked by the fixed plate when the lower end of the rotating plate rotates counterclockwise, and the displacement of the pin shaft due to the friction at the connecting position of the bearing block and the connecting frame is avoided.

Description

Technical Field

[0001] This invention relates to the field of hydraulic insertion and removal pin technology, specifically to a hydraulic insertion and removal pin device and its usage method. Background Technology

[0002] A pin is a standardized fastener mainly used at the hinge joint of two parts to form a hinge connection.

[0003] In the prior art, Chinese invention with publication number CN114029719A discloses a hydraulic insertion and removal pin device and its usage method. The hydraulic insertion and removal pin device and its usage method use a hydraulic device to insert the pin between the lifting device and the heavy object for connection, which is more convenient than manually installing the pin.

[0004] However, its pin section is a parallel shaft. After insertion and when lifting heavy objects, the pin will shift due to friction between the heavy object and the connection, which may cause the pin to fall off and pose a risk. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic insertion and removal pin device and its usage method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic insertion and removal pin device, a connecting frame, a pin hole is provided on the side surface of the connecting frame, an installation groove is provided on the inner wall of the pin hole, a limiting gear and a rotating plate are movably provided on the inner wall of the installation groove, a groove is provided on the inner side surface of the connecting frame, a support plate is movably provided on the inner wall of the groove, and a load-bearing block is movably provided on the inner side surface of the connecting frame;

[0007] A pin is provided, with a screw movably mounted inside the pin, a push rod movably mounted at the end of the screw, a pressing block fixed at the end of the push rod, and a receiving groove opened inside the pin near its end, with toothed blocks movably mounted on the inner wall of the receiving groove.

[0008] Preferably, a hanging rope connecting roller is fixed at the upper end of the connecting frame, the pin is movably disposed on the inner wall of the pin hole, the diameter of the pin is smaller than the diameter of the inner wall of the pin hole, a slide rail is fixed on the inner wall of the pin hole, a slide groove is formed on the outer surface of the pin, the slide rail corresponds to the slide groove and is movably engaged, and the thickness of the slide rail is smaller than the thickness of the slide groove.

[0009] Preferably, the inner wall of the mounting groove is provided with a fan-shaped groove, the fan-shaped groove is connected to the mounting groove, a fixing plate is fixed to the inner wall of the fan-shaped groove, a rotating shaft is fixed at the center of the fan-shaped groove and the mounting groove, and the rotating plate is movably sleeved on the outer surface of the rotating shaft at the center.

[0010] Preferably, the fixing plate is located on the side of the rotating plate, and the fixing plate is closer to the inner side of the connecting frame. When the rotating plate is vertical due to gravity, it is in contact with the side surface of the fixing plate. The lower end of the rotating plate corresponds to the limiting gear and is movably locked.

[0011] Preferably, the groove is in the shape of a right triangle, the upper side surface of the load-bearing block has a connecting hole that penetrates the load-bearing block, and the lower side surface of the load-bearing block has a support groove.

[0012] Preferably, the support plate corresponds to the support groove and is movably engaged. When the upper surface of the support plate is in contact with the upper surface of the inner wall of the support groove, the connecting hole corresponds to the pin hole. When the upper surface of the support plate is in contact with the inclined surface of the groove, the end of the support plate will not contact the side surface of the load-bearing block.

[0013] Preferably, the pin has a through hole inside, and the through hole has a threaded groove on the inner wall near the end. The through hole is connected to the receiving groove, and the screw is movably disposed inside the through hole and is movably engaged with the threaded groove.

[0014] Preferably, the screw has an annular groove inside its end portion, and an annular block is fixed to one end of the push rod. The annular groove corresponds to and is movably engaged with the annular block. The extrusion block is located inside the receiving groove, and a transmission block is movably provided inside the receiving groove located on the upper side of the extrusion block.

[0015] Preferably, the toothed block is fixed to the upper surface of the transmission block, the side surface of the extrusion block is fixed with a positioning block, and the inner wall side surface of the receiving groove is provided with a positioning groove, which corresponds to the positioning block and is movably engaged.

[0016] A method of using the hydraulic insertion and removal pin device described above includes the following steps:

[0017] Step 1: Anti-slip. The hydraulic cylinder fully presses the pin into the pin hole. Before installing the pin, rotate the screw. Due to the threaded fit, the screw's rotation in the threaded groove will cause it to move slowly along its axis. Since the push rod is movably connected to the screw, the screw's rotation will push the push rod horizontally. The push rod's movement will cause the extrusion block to move along the positioning groove. Because the upper surface of the extrusion block and the lower surface of the transmission block have inclined surfaces, and the two inclined surfaces have the same slope but opposite directions, the extrusion block will push the transmission block upwards as it moves. The upward movement of the transmission block will cause the toothed block to move out of the receiving groove. At this point, the connection... The hole corresponds to the pin hole, and the pin is fully pressed into the pin hole by the hydraulic cylinder. Since the rotating plate is located on the side of the fixed plate, and the fixed plate is closer to the inner side of the connecting frame, when the pin is inserted into the pin hole, the movement of the tooth block driving the rotation of the limit gear will not be blocked by the fixed plate. When the pin is displaced outward due to friction at the connection between the load-bearing block and the connecting frame, the limit gear will rotate clockwise. The clockwise rotation of the limit gear will drive the lower end of the rotating plate to rotate counterclockwise. When the lower end of the rotating plate rotates counterclockwise, the upper end of the rotating plate will be blocked by the fixed plate, thus avoiding the phenomenon of the pin being displaced due to friction at the connection between the load-bearing block and the connecting frame.

[0018] Step Two: Support. Drive the hoisting rope to move the connecting frame downwards, causing the load-bearing block to be locked inside the connecting frame. Since the support plate is locked in the support groove due to gravity when laid flat, when the connecting frame moves down on the side surface of the load-bearing block, the support plate will be blocked by the corners of the load-bearing block and cause it to flip. When the support plate moves down into the support groove, it will be horizontal due to gravity. At this time, drive the hoisting rope to slowly move the connecting frame upwards, so that the upper surface of the support plate is completely in contact with the upper surface of the inner wall of the support groove. The support plate will support the load-bearing block, and the connecting hole will also correspond to the pin hole. Since the pin is smaller than the diameter of the pin hole, the support plate will provide the main support for the load-bearing block, preventing the pin from becoming the only stress point of the load-bearing block and causing the pin to break or bend.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The connecting hole is aligned with the pin hole, and the pin is fully pressed into the pin hole by the hydraulic cylinder. When the pin is inserted into the pin hole, the movement of the toothed block drives the rotation of the limit gear without being blocked by the fixed plate. When the pin is displaced outward due to friction at the connection between the load-bearing block and the connecting frame, the limit gear will rotate clockwise. The clockwise rotation of the limit gear will drive the lower end of the rotating plate to rotate counterclockwise. When the lower end of the rotating plate rotates counterclockwise, the upper end of the rotating plate will be blocked by the fixed plate, thus preventing the pin from being displaced due to friction at the connection between the load-bearing block and the connecting frame. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is an exploded view of the overall structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 4 This is a cross-sectional schematic diagram of the limiting component structure of the present invention;

[0025] Figure 5 This is an exploded cross-sectional view of the limiting component structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the pin assembly structure of the present invention;

[0027] Figure 7 This is a cross-sectional schematic diagram of the pin assembly structure of the present invention;

[0028] Figure 8 This is an exploded cross-sectional view of the pin assembly structure of the present invention;

[0029] Figure 9 This is a cross-sectional schematic diagram of the storage groove structure of the present invention;

[0030] Figure 10 This is a cross-sectional exploded view of the screw assembly structure of the present invention.

[0031] In the diagram: 1. Connecting frame; 2. Suspension rope connecting roller; 3. Pin; 4. Screw; 5. Load-bearing block; 6. Support plate; 7. Connecting hole; 8. Support groove; 9. Limiting gear; 10. Transmission block; 11. Extrusion block; 12. Groove; 13. Slide rail; 14. Pin hole; 15. Sector groove; 16. Fixing plate; 17. Rotating plate; 18. Mounting groove; 19. Slide groove; 20. Tooth block; 21. Push rod; 22. Through hole; 23. Threaded groove; 24. Storage groove; 25. Positioning groove; 26. Annular groove; 27. Annular block; 28. Positioning block. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 10 The present invention provides a technical solution: a hydraulic insertion and removal pin device and its usage method.

[0034] Example 1: A hydraulic insertion and removal pin device and its usage method, comprising: a pin hole 14 is provided on the side surface of the connecting frame 1, and an installation groove 18 is provided on the inner wall of the pin hole 14. A limiting gear 9 and a rotating plate 17 are movably provided on the inner wall of the installation groove 18. The limiting gear 9 rotates clockwise, which drives the lower end of the rotating plate 17 to rotate counterclockwise. The upper end of the rotating plate 17 is blocked by a fixing plate 16. A groove 12 is provided on the inner surface of the connecting frame 1, and a support plate 6 is movably provided on the inner wall of the groove 12. A load-bearing block 5 is movably provided on the inner surface of the connecting frame 1. Since the pin 3 is smaller than the diameter of the pin hole 14, the support plate 6 will play a major supporting role for the load-bearing block 5, avoiding the pin 3 being the only stress point of the load-bearing block 5, thus preventing the pin 3 from breaking or bending.

[0035] A screw 4 is movably mounted inside the pin 3, and a push rod 21 is movably mounted at the end of the screw 4. A pressing block 11 is fixed at the end of the push rod 21. A receiving groove 24 is opened inside the pin 3 near its end, and a toothed block 20 is movably mounted on the inner wall of the receiving groove 24. When the pin 3 is displaced outward due to friction at the connection between the load-bearing block 5 and the connecting frame 1, the limiting gear 9 will rotate clockwise. The clockwise rotation of the limiting gear 9 will drive the lower end of the rotating plate 17 to rotate counterclockwise. The upper end of the rotating plate 17 will be blocked by the fixed plate 16, thereby preventing the pin 3 from being displaced due to friction at the connection between the load-bearing block 5 and the connecting frame 1.

[0036] Based on Embodiment 1, in order to prevent the pin 3 from shifting in the pin hole 14, a hanging rope connecting roller 2 is fixed at the upper end of the connecting frame 1. The pin 3 is movably disposed on the inner wall of the pin hole 14. The diameter of the pin 3 is smaller than the diameter of the inner wall of the pin hole 14. A slide rail 13 is fixed on the inner wall of the pin hole 14. A slide groove 19 is opened on the outer surface of the pin 3. The slide rail 13 corresponds to the slide groove 19 and is movably locked. The thickness of the slide rail 13 is smaller than the thickness of the slide groove 19. Since the pin 3 is smaller than the diameter of the pin hole 14, the support plate 6 will play a major supporting role for the load-bearing block 5.

[0037] A sector-shaped groove 15 is provided on the inner wall of the mounting groove 18, and the sector-shaped groove 15 is connected to the mounting groove 18. A fixing plate 16 is fixed on the inner wall of the sector-shaped groove 15. A rotating shaft is fixed at the center of the connection between the sector-shaped groove 15 and the mounting groove 18. The center of the rotating plate 17 is movably sleeved on the outer surface of the rotating shaft. The fixing plate 16 is located on the side of the rotating plate 17 and is closer to the inner side of the connecting frame 1. When the rotating plate 17 is vertical due to gravity, it is in contact with the side surface of the fixing plate 16. The lower end of the rotating plate 17 corresponds to the limiting gear 9 and is movably locked. The limiting gear 9 rotates clockwise, and the clockwise rotation of the limiting gear 9 will drive the lower end of the rotating plate 17 to rotate counterclockwise. When the lower end of the rotating plate 17 rotates counterclockwise, the upper end of the rotating plate 17 will be blocked by the fixing plate 16, thereby preventing the pin shaft 3 from being displaced due to friction between the load-bearing block 5 and the connecting frame 1.

[0038] The groove 12 is a right-angled triangle. A connecting hole 7 is provided on the upper side surface of the load-bearing block 5, and the connecting hole 7 penetrates the load-bearing block 5. A support groove 8 is provided on the lower side surface of the load-bearing block 5. The support plate 6 corresponds to the support groove 8 and is movably engaged. When the upper surface of the support plate 6 is in contact with the upper surface of the inner wall of the support groove 8, the connecting hole 7 corresponds to the pin hole 14. When the upper surface of the support plate 6 is in contact with the upper inclined surface of the groove 12, the end of the support plate 6 will not contact the side surface of the load-bearing block 5. When the connecting frame 1 moves down on the side surface of the load-bearing block 5, the support plate 6 will be blocked by the corner of the load-bearing block 5 and cause it to flip. When the support plate 6 moves down into the support groove 8, it will be horizontal due to gravity. At this time, the driving rope will cause the connecting frame 1 to slowly move up, so that the upper surface of the support plate 6 is completely in contact with the upper surface of the inner wall of the support groove 8. The support plate 6 will then support the load-bearing block 5.

[0039] The pin 3 has a through hole 22 inside, and a threaded groove 23 is formed on the inner wall of the through hole 22 near its end. The through hole 22 is connected to the receiving groove 24. The screw 4 is movably disposed inside the through hole 22 and is movably engaged with the threaded groove 23. An annular groove 26 is formed on the inner wall of the screw 4 near its end. An annular block 27 is fixed to one end of the push rod 21. The annular groove 26 corresponds to the annular block 27 and is movably engaged with it. The extrusion block 11 is located inside the receiving groove 24. A transmission block 10 is movably disposed inside the receiving groove 24 located above the extrusion block 11. A toothed block 20 is fixed to the upper surface of the transmission block 10. A positioning block 28 is fixed to the side surface of the extrusion block 11. The inner wall side surface of the storage groove 24 is provided with a positioning groove 25, which corresponds to the positioning block 28 and is movably engaged. Since the push rod 21 is movably connected to the screw 4, the screw 4 will push the push rod 21 to move horizontally while rotating and moving. The movement of the push rod 21 will drive the extrusion block 11 to move along the direction of the positioning groove 25. Since the upper surface of the extrusion block 11 is provided with an inclined surface and the lower surface of the transmission block 10 is provided with an inclined surface, and the two inclined surfaces have the same slope but opposite directions, the extrusion block 11 will push the transmission block 10 to move upward when moving. The upward movement of the transmission block 10 will drive the toothed block 20 to move out of the storage groove 24.

[0040] The present invention also discloses a method of using a hydraulic insertion and removal pin device, comprising the following steps:

[0041] Step 1: Anti-slip. The hydraulic cylinder fully presses the pin 3 into the pin hole 14. Before installing the pin, rotate the screw 4. Due to the threaded fit, the screw 4 rotates in the threaded groove 23, causing it to move slowly along its axis. Since the push rod 21 is movably connected to the screw 4, the screw 4 rotates and pushes the push rod 21 horizontally. The movement of the push rod 21 causes the pressing block 11 to move along the positioning groove 25. Because the upper surface of the pressing block 11 and the lower surface of the transmission block 10 have inclined surfaces with the same slope but opposite directions, the pressing block 11 pushes the transmission block 10 upwards as it moves. The upward movement of the transmission block 10 causes the toothed block 20 to move out of the receiving groove 24. At this time, the connecting hole 7... Corresponding to the pin hole 14, the pin 3 is completely pressed into the pin hole 14 by the hydraulic cylinder. Since the rotating plate 17 is located on the side of the fixed plate 16, and the fixed plate 16 is closer to the inner side of the connecting frame 1, when the pin 3 is inserted into the pin hole 14, the movement of the tooth block 20 driving the limit gear 9 to rotate will not be blocked by the fixed plate 16. When the pin 3 is displaced outward due to friction at the connection between the load block 5 and the connecting frame 1, the limit gear 9 will rotate clockwise. The clockwise rotation of the limit gear 9 will drive the lower end of the rotating plate 17 to rotate counterclockwise. When the lower end of the rotating plate 17 rotates counterclockwise, the upper end of the rotating plate 17 will be blocked by the fixed plate 16, thereby avoiding the phenomenon that the pin 3 is displaced due to friction at the connection between the load block 5 and the connecting frame 1.

[0042] Step Two: Support. Drive the hoisting rope to move the connecting frame 1 downwards, so that the load-bearing block 5 is locked inside the connecting frame 1. Since the support plate 6 is locked in the support groove 8 when it is laid flat due to gravity, when the connecting frame 1 moves down on the side surface of the load-bearing block 5, the support plate 6 will be blocked by the corner of the load-bearing block 5 and will flip over. When the support plate 6 moves down into the support groove 8, it will be horizontal due to gravity. At this time, drive the hoisting rope to move the connecting frame 1 slowly upwards, so that the upper surface of the support plate 6 is completely in contact with the upper surface of the inner wall of the support groove 8. The support plate 6 will support the load-bearing block 5. At the same time, the connecting hole 7 will also correspond to the pin hole 14. Since the pin 3 is smaller than the diameter of the pin hole 14, the support plate 6 will play the main supporting role for the load-bearing block 5, avoiding the pin 3 being the only stress point of the load-bearing block 5, which would cause the pin 3 to break or bend.

[0043] In actual use, the connecting hole 7 is aligned with the pin hole 14, and the pin 3 is fully pressed into the pin hole 14 by the hydraulic cylinder. Before installing the pin, the screw 4 is rotated. Due to the threaded fit, the screw 4 rotates in the thread groove 23 and will drive the screw 4 to move slowly along its axis. Since the push rod 21 is movably connected to the screw 4, the screw 4 will push the push rod 21 to move horizontally while rotating and moving. The movement of the push rod 21 will drive the extrusion block 11 to move along the positioning groove 25. Since the upper surface of the extrusion block 11 is provided with an inclined surface and the lower surface of the transmission block 10 is provided with an inclined surface, and the two inclined surfaces have the same slope but opposite directions, the extrusion block 11 will push the transmission block 10 to move upward when moving. The upward movement of the transmission block 10 will drive the tooth block 20 to move out of the receiving groove 24.

[0044] At this time, the connecting hole 7 is aligned with the pin hole 14, and the pin 3 is completely squeezed into the pin hole 14 by the hydraulic cylinder. Since the rotating plate 17 is located on the side of the fixed plate 16, and the fixed plate 16 is closer to the inner side of the connecting frame 1, when the pin 3 is inserted into the pin hole 14, the movement of the tooth block 20 to drive the rotation of the limiting gear 9 will not be blocked by the fixed plate 16. When the pin 3 is displaced outward due to friction at the connection between the load block 5 and the connecting frame 1, the limiting gear 9 will rotate clockwise. The clockwise rotation of the limiting gear 9 will drive the lower end of the rotating plate 17 to rotate counterclockwise. When the lower end of the rotating plate 17 rotates counterclockwise, the upper end of the rotating plate 17 will be blocked by the fixed plate 16, thereby avoiding the phenomenon that the pin 3 is displaced due to friction at the connection between the load block 5 and the connecting frame 1.

[0045] The driving rope moves the connecting frame 1 downward, so that the load-bearing block 5 is locked inside the connecting frame 1. Since the support plate 6 is locked in the support groove 8 when it is laid flat due to gravity, when the connecting frame 1 moves down on the side surface of the load-bearing block 5, the support plate 6 will be blocked by the corner of the load-bearing block 5 and cause it to flip. When the support plate 6 moves down into the support groove 8, it will be horizontal due to gravity. At this time, the driving rope moves the connecting frame 1 slowly upward, so that the upper surface of the support plate 6 is completely in contact with the upper surface of the inner wall of the support groove 8. The support plate 6 will support the load-bearing block 5.

[0046] Meanwhile, the connecting hole 7 will also correspond to the pin hole 14. Since the pin 3 is smaller than the diameter of the pin hole 14, the support plate 6 will play a major supporting role for the load-bearing block 5, so as to prevent the pin 3 from being the only stress point of the load-bearing block 5 and causing the pin 3 to break or bend.

[0047] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A hydraulic insertion and removal pin device, characterized in that: include: A connecting frame (1) has a pin hole (14) on its side surface, an installation groove (18) on the inner wall of the pin hole (14), a limiting gear (9) and a rotating plate (17) movably disposed on the inner wall of the installation groove (18), a groove (12) on the inner side surface of the connecting frame (1), a support plate (6) movably disposed on the inner wall of the groove (12), and a load-bearing block (5) movably disposed on the inner side surface of the connecting frame (1). A pin (3) is provided inside the pin (3), a screw (4) is provided inside the pin (3), a push rod (21) is provided at the end of the screw (4), a pressing block (11) is fixed at the end of the push rod (21), a storage groove (24) is provided inside the pin (3) near the end, and a toothed block (20) is provided on the inner wall of the storage groove (24). The inner wall of the mounting groove (18) is provided with a fan-shaped groove (15), which is connected to the mounting groove (18). A rotating shaft is fixed at the center of the connection between the fan-shaped groove (15) and the mounting groove (18). The rotating plate (17) is movably sleeved on the outer surface of the rotating shaft at the center. A fixing plate (16) is fixed to the inner wall of the fan-shaped groove (15). When the rotating plate (17) is vertical due to gravity, it is in contact with the side surface of the fixing plate (16). The lower end of the rotating plate (17) corresponds to the limiting gear (9) and is movably locked. An annular groove (26) is provided inside the end of the screw (4). An annular block (27) is fixed at one end of the push rod (21). The annular groove (26) corresponds to the annular block (27) and is movably locked. The pressing block (11) The storage groove (24) is located inside the storage groove (24) above the extrusion block (11), and the transmission block (10) is movably provided inside the storage groove (24); the tooth block (20) is fixed on the upper surface of the transmission block (10), the side surface of the extrusion block (11) is fixed with a positioning block (28), the inner wall side surface of the storage groove (24) is provided with a positioning groove (25), the positioning groove (25) corresponds to the positioning block (28) and is movably locked; the upper surface of the extrusion block (11) is provided with an inclined surface, the lower surface of the transmission block (10) is provided with an inclined surface, and the two inclined surfaces have the same slope but opposite directions. When the extrusion block (11) moves, it pushes the transmission block (10) upward; the movement of the tooth block (20) drives the limit gear (9) to rotate without being blocked by the fixed plate (16).

2. The hydraulic insertion and removal pin device according to claim 1, characterized in that: The upper end of the connecting frame (1) is fixed with a hanging rope connecting roller (2). The pin (3) is movably disposed on the inner wall of the pin hole (14). The diameter of the pin (3) is smaller than the inner wall diameter of the pin hole (14). The inner wall of the pin hole (14) is fixed with a slide rail (13). The outer surface of the pin (3) is provided with a slide groove (19). The slide rail (13) corresponds to the slide groove (19) and is movably engaged. The thickness of the slide rail (13) is smaller than the thickness of the slide groove (19).

3. The hydraulic insertion and removal pin device according to claim 1, characterized in that: The fixing plate (16) is located on the side of the rotating plate (17), and the fixing plate (16) is closer to the inside of the connecting frame (1).

4. The hydraulic insertion and removal pin device according to claim 3, characterized in that: The groove (12) is a right-angled triangle. The upper side surface of the load-bearing block (5) is provided with a connecting hole (7) that penetrates the load-bearing block (5). The lower side surface of the load-bearing block (5) is provided with a support groove (8).

5. A hydraulic insertion and removal pin device according to claim 4, characterized in that: The support plate (6) corresponds to the support groove (8) and is movably engaged. When the upper surface of the support plate (6) is in contact with the upper surface of the inner wall of the support groove (8), the connecting hole (7) corresponds to the pin hole (14). When the upper surface of the support plate (6) is in contact with the inclined surface of the groove (12), the end of the support plate (6) will not contact the side surface of the load-bearing block (5).

6. A hydraulic insertion and removal pin device according to claim 5, characterized in that: The pin (3) has a through hole (22) inside, and a threaded groove (23) is provided on the inner wall of the through hole (22) near the end. The through hole (22) is connected to the receiving groove (24). The screw (4) is movably disposed inside the through hole (22) and is movably engaged with the threaded groove (23).

7. A method of using the hydraulic insertion and removal pin device according to claim 6, characterized in that: Includes the following steps: Step 1: Anti-slip. The hydraulic cylinder completely presses the pin (3) into the pin hole (14). Before installing the pin, rotate the screw (4). Due to the threaded fit, the screw (4) rotates in the thread groove (23) and will drive the screw (4) to move slowly along its axis. Since the push rod (21) is movably connected to the screw (4), the screw (4) will push the push rod (21) to move horizontally while rotating. The movement of the push rod (21) will drive the extrusion block (11) to move along the positioning groove (25). Since the upper surface of the extrusion block (11) is provided with an inclined surface and the lower surface of the transmission block (10) is provided with an inclined surface, and the two inclined surfaces have the same slope but opposite directions, the extrusion block (11) will push the transmission block (10) upward when it moves. The upward movement of the transmission block (10) will drive the tooth block (20) to move out of the receiving groove (24). At this time, connect the connecting hole (7) and the pin. The hole (14) corresponds to the pin (3) and the pin (3) is completely squeezed into the pin hole (14) by the hydraulic cylinder. Since the rotating plate (17) is located on the side of the fixed plate (16) and the fixed plate (16) is closer to the inside of the connecting frame (1), when the pin (3) is inserted into the pin hole (14), the moving drive limit gear (9) of the tooth block (20) will not be blocked by the fixed plate (16). When the pin (3) is displaced outward due to friction at the connection between the load block (5) and the connecting frame (1), the limit gear (9) will rotate clockwise. The clockwise rotation of the limit gear (9) will drive the lower end of the rotating plate (17) to rotate counterclockwise. When the lower end of the rotating plate (17) rotates counterclockwise, the upper end of the rotating plate (17) will be blocked by the fixed plate (16), thus avoiding the phenomenon that the pin (3) is displaced due to friction at the connection between the load block (5) and the connecting frame (1). Step 2: Support, drive the hoisting rope to move the connecting frame (1) downwards, so that the load-bearing block (5) is locked inside the connecting frame (1). Since the support plate (6) is locked in the support groove (8) when it is laid flat due to gravity, when the connecting frame (1) moves down on the side surface of the load-bearing block (5), the support plate (6) will be blocked by the corner of the load-bearing block (5) and cause it to flip. When the support plate (6) moves down into the support groove (8), it will be horizontal due to gravity. At this time, drive the hoisting rope to move the connecting frame (1) downwards. Slowly move upwards so that the upper surface of the support plate (6) is completely in contact with the upper surface of the inner wall of the support groove (8). The support plate (6) will support the load block (5), and the connecting hole (7) will also correspond to the pin hole (14). Since the pin (3) is smaller than the diameter of the pin hole (14), the support plate (6) will play a major supporting role for the load block (5), avoiding the pin (3) being the only stress point of the load block (5), which would cause the pin (3) to break or bend.

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