Dual Mode Wheel Pin Remover

Abstract

A dual-mode wheel pin disassembly machine includes a support frame, a vertical frame is installed on one side of the support frame, a boom is arranged on the vertical frame, a disassembly device is horizontally installed at the front end of the boom through the lower part of the suspension mechanism; the disassembly device includes a mounting frame, the mounting frame is connected to the lower part of the boom, a through-type jack is arranged in the mounting frame, a long screw is installed in the through-type jack; a triangular cross arm is installed at one end of the mounting frame, a top cylinder is connected to the outer side of the triangular cross arm, one end of the long screw passes through the triangular cross arm and enters the top cylinder, a chuck is installed at the other end of the mounting frame, the other end of the long screw passes through the chuck, a positioning tooth is arranged at the outer end of the claw of the chuck, and the mounting frame can rotate horizontally relative to the boom. The positive effects of the present invention are: the process steps are correspondingly reduced, the work efficiency is improved, the overturning of the device is avoided, and fine adjustments can be made during the disassembly process to ensure the normal progress of the disassembly operation.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, in particular to a dual-mode wheel pin disassembly machine. Background Art

[0002] With the rapid development of the coal industry and the improvement of the design and manufacturing level of mechanical products, there are more and more types of large-scale coal mining equipment, and the specifications of the connecting pins, transmission wheels, couplings, bearings, etc. between various structural components are also getting larger and larger. When repairing coal mining equipment, the disassembly of these parts has become a very difficult problem. Conventional pin pullers and wheel pullers have single functions, and the conversion between the two is difficult. The comprehensiveness and versatility are extremely poor. There are many manual operation procedures, low work efficiency, and time-consuming and labor-intensive. Therefore, developing a special tool to solve this problem has practical significance for the maintenance of coal mining equipment and other heavy machinery and equipment. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a dual-mode wheel pin disassembly machine, wherein the disassembly device includes a chuck and other devices that can hold the rigid wheel and push the pin outward, as well as a long screw and a push cylinder and other devices that can pull out the pin. Two sets of devices for disassembly in different ways are installed in one book and share a power system. The switching is flexible and convenient, and can meet the requirements of different disassembly methods. The additional guide connection block and movable support can ensure the balance of the disassembly device when using different disassembly methods. The joint bearing, rotating shaft and parallelogram lifting mechanism can ensure that the disassembly device can adjust the distance in space to cooperate with the required disassembly of the wheel pin.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a dual-mode wheel pin disassembly machine, including a supporting frame, a vertical frame is installed on one side of the supporting frame, a boom is provided on the vertical frame, and a disassembly device is horizontally installed on the front end of the boom through the lower part of the suspension mechanism; the disassembly device includes a mounting frame, the mounting frame is connected to the lower part of the boom, a through-type jack is provided in the mounting frame, and a long screw is installed in the through-type jack; a triangular cross arm is installed at one end of the mounting frame, a top cylinder is connected to the outer side of the triangular cross arm, one end of the long screw passes through the triangular cross arm and passes into the top cylinder, a chuck is installed at the other end of the mounting frame, the other end of the long screw passes through the chuck, the outer end of the clamping claw of the chuck is provided with a positioning tooth, and the mounting frame can rotate horizontally relative to the boom.

[0005] A top tube baffle is provided between the triangular cross arm and the top tube, the top tube baffle is installed on the triangular cross arm, a gasket is provided between the top tube baffle and the triangular cross arm, leaving a certain distance, a through hole with a notch is provided on the top tube baffle, a positioning block is provided on the inner end surface of the top tube, the positioning block matches the notch, and the through hole can accommodate the top tube to pass through. The mounting frame includes three tension screws, one end of the three tension screws is installed on the triangular cross arm, and the other end is connected to the chuck respectively, and the first fixing bracket and the second fixing bracket are fixedly installed on the three tension screws, the first fixing bracket and the second fixing bracket are respectively installed at the two end positions of the through-type jack, and the first fixing bracket and the second fixing bracket are provided with a mounting plate on the upper part. The mounting frame is provided with a guide connection block, a guide groove is provided in the guide connection block, a strip hole is provided on the top of the guide connection block, the strip hole is communicated with the guide groove, the width of the strip hole is smaller than the width of the guide groove, an adjustment screw and a movable support are installed in the guide groove, the adjustment screw is threadedly connected with the movable support, the upper part of the movable support extends out of the strip hole and is connected to the boom, guide blocks or needle bearings are installed on both sides of the movable support, the guide blocks or needle bearings are located in the guide groove, the movable support cooperates with the guide groove and can slide in the guide groove, and the position of the movable support in the guide groove can be adjusted by rotating the adjustment screw. A joint bearing is installed on the upper part of the movable support, and is connected to the boom through the joint bearing. The boom is connected to the mounting frame via a suspension mechanism; the suspension mechanism includes a lower protective cover, an upper protective cover, a rotating shaft and a supporting spring; the lower protective cover is connected to the boom, the upper protective cover is mounted on the lower protective cover, a supporting spring is arranged inside the lower protective cover, the top of the supporting spring is connected to the upper protective cover, the lower end opening of the upper protective cover is covered on the outer periphery of the lower protective cover, a rotating shaft is vertically mounted on the upper protective cover, the rotating shaft passes through the lower protective cover and the boom and is connected to the mounting frame. An adjusting nut is mounted on the rotating shaft, a thrust bearing is arranged between the adjusting nut and the top of the upper protective cover, the rotating shaft is threadedly connected to the adjusting nut, and the lower end of the rotating shaft is connected to the mounting frame. A parallelogram lifting mechanism is provided on the upper part of the vertical frame, the lower end of the parallelogram lifting mechanism is hinged on the vertical frame, the upper end is a boom bracket, the boom bracket is equipped with a boom shaft and a limit block, the boom is connected to the boom bracket through the boom shaft, the limit block is located on one side of the boom to limit the horizontal swing range of the boom, a connecting pipe is provided on the parallelogram lifting mechanism, a manual hydraulic cylinder is hinged on the carrier, and the piston rod of the manual hydraulic cylinder is hinged to the connecting pipe. Travel wheels are respectively installed at the four corners of the bottom surface of the carrier.

[0006] The positive effect of the present invention is that two different disassembly methods are integrated into one device, eliminating the trouble of replacing different disassembly parts and accessories when switching the working conditions of the wheel pin disassembly. At the same time, the versatility and comprehensiveness of the dual-mode wheel pin disassembly machine are greatly improved, and the process steps are correspondingly reduced, thereby improving work efficiency. Different working surfaces need to be converted when using different disassembly methods. The added guide connection blocks and movable supports can be controlled by the adjustment screw to ensure that the center of gravity of the disassembly device after the conversion is in a suitable position to avoid overturning of the device. When disassembling the wheel pins and other equipment of large equipment, the wheel pins will usually tilt to varying degrees due to unequal positions and other reasons. The spherical bearings, vertical spacing adjustment devices, rotating shafts and parallelogram lifting mechanisms can adjust the position of the disassembly device in space, and can also be fine-tuned during the disassembly process to ensure the normal progress of the disassembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a three-dimensional stereogram of the present invention;

[0008] Figure 2 It is a schematic diagram of the structure of the present invention;

[0009] Figure 3 is a schematic diagram of the structure of the disassembly device;

[0010] Figure 4 yes Figure 3 A top view of

[0011] Figure 5 yes Figure 3 Left view of

[0012] Figure 6 yes Figure 3 Middle AA section view;

[0013] Figure 7 yes Figure 5 A partial enlarged view of middle I;

[0014] Figure 8 It is a schematic diagram of the structure after the disassembly device is removed;

[0015] Fig. 9 yes Figure 8 A top view of

[0016] Fig.10 yes Figure 8 A partial enlarged view of middle II;

[0017] Fig.11 yes Figure 8 Middle BB section view.

[0018] In the figure, 1 a carrier frame, 2 a vertical frame, 3 a boom, 4 a triangular cross arm, 5 a through-type jack, 6 a long screw, 7 a chuck, 8 a top cylinder, 9 a top cylinder baffle, 10 a notch, 11 a positioning block, 12 a handle, 13 a tension screw, 14 a first fixed bracket, 15 a second fixed bracket, 16 a mounting plate, 17 a guide connecting block, 18 a guide groove, 19 an adjusting screw, 20 a movable support, 21 a guide block or a needle bearing, 22 a spherical bearing, 23 an inner ball of a bearing, 24 a rotating shaft, 25 a suspension mechanism, 26 a lower protective cover, 27 an upper protective cover, 28 a supporting spring, 29 an adjusting nut, 30 a boom rotating shaft, 31 a limiting block, 32 a parallelogram lifting mechanism, 33 a boom bracket, 34 a connecting pipe, 35 a manual hydraulic cylinder, 36 a walking wheel, 37 a clamping claw, 38 a positioning tooth, 39 a strip hole, 40 a thrust bearing, 41 a screw sleeve, 42 a transition screw shaft. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the dual-mode wheel pin removal machine of the present invention comprises a carrier frame 1, a vertical frame 2 is installed on one side of the carrier frame 1, a suspension arm 3 is provided on the vertical frame 2, and a removal device is installed at the front end of the suspension arm 3 through a suspension mechanism 25. Figure 3 As shown, the disassembly device includes a mounting frame, which can be directly connected to the lower part of the boom 3. A through-type jack 5 is provided in the mounting frame, and a long screw 6 is installed in the through-type jack 5. One end of the long screw 6 is connected to a screw sleeve 41 through a thread, and the other end is connected to a transition screw shaft 42 through a thread. One end of the screw sleeve 41 contacts the end surface of the middle cylinder of the through-type jack 5, but is not connected. The middle cylinder of the through-type jack 5 can push the screw sleeve 41 to drive the long screw 6 to move. The through-type jack 5 can drive the screw sleeve 41 and the long screw 6 to move. A triangular cross arm 4 is installed at one end of the mounting frame, and a top cylinder 8 is connected to the outer side of the triangular cross arm 4. One end of the long screw 6 passes through the triangular cross arm 4 and enters the top cylinder 8. A chuck 7 is installed at the other end of the mounting frame, and the other end of the long screw 6 passes through the chuck 7. The outer end of the claw 37 of the chuck 7 is provided with a positioning tooth 38, and the mounting frame can rotate horizontally relative to the boom 3. The suspension mechanism 25 can be an existing suspension component.

[0020] When removing a rigid wheel, first move the disassembly machine to the work site, adjust the position of the pull claw 37 of the chuck 7 according to the diameter of the rigid wheel where the wheel pin to be removed is located, so that the positioning teeth 38 are tightly matched with the inner ring of the wheel to be removed, and at the same time adjust the position of the long screw 6 to ensure that the center of the long screw 6 coincides with the center of the wheel pin to be removed, and then rotate the long screw 6 so that its front end contacts the support shaft of the rigid wheel to be removed. Then supply oil to the through-type jack 5 so that the long screw 6 continues to push against the support shaft of the wheel to be removed until the disassembly is completed and the oil supply is stopped, adjust the chuck 7 to loosen the rigid wheel, and retract the long screw 6 to complete the wheel removal.

[0021] When removing the pin, first rotate the disassembly device horizontally to another working surface, select the appropriate welding nut specifications according to the diameter, fit and tension of the pin to be removed, and weld it with the end face of the pin to be removed. Then move the disassembly machine to the work site, pull out the long screw 6 from the through-type jack 5, screw the transition screw shaft into one end of the long screw 6, and then screw the transition screw shaft 42 into the welding nut or the center screw hole of the pin. Move the disassembly machine so that the center of the top tube 8 coincides with the center of the long screw 6, and the long screw 6 is passed into the through-type jack 5. When the long screw 6 just extends out of the end face of the through-type jack 5, screw in the screw sleeve 41, and push the entire disassembly machine so that the end face of the top tube 8 contacts the shell surface of the pin bearing hole to be removed, and at the same time, the end face of the screw sleeve 41 contacts the end face of the through-type jack 5. Then, oil is supplied to the through-type jack 5, and the through-type jack 5 drives the screw sleeve 41, the long screw rod 6, and the transition screw rod 42 to move the wheel pin to be removed outward, thereby pulling out the wheel pin, and completing the pin removal.

[0022] Preferably, Figure 3 , Figure 5 As shown, a top tube baffle 9 is provided between the triangular cross arm 4 and the top tube 8, and the top tube baffle 9 is installed on the triangular cross arm 4. A gasket is provided between the top tube baffle 9 and the triangular cross arm 4, leaving a certain distance. A through hole with two notches 10 can be provided on the top tube baffle 9, and two positioning blocks 11 are provided on the end surface of the top tube 8. The two positioning blocks 11 match the two notches 10, and the thickness of the two positioning blocks 11 is slightly smaller than the distance between the top tube baffle 9 and the triangular cross arm 4. The two positioning blocks 11 of the top tube 8 can be aligned with the two notches 10 and pushed into the through hole on the top tube baffle 9, and then the top tube 8 can be rotated to a certain angle. At this time, the positioning blocks 11 are no longer located at the position of the notch 10, and the top tube 8 can be fixed on the top tube baffle 9. A handle 12 is installed on the top tube 8, which can be more convenient to disassemble and assemble the top tube 8. When the pin pulling operation is not required, the top tube 8 can be removed to reduce the weight of the whole machine, reduce the working space, and be more convenient to operate.

[0023] Preferably, the mounting frame on the triangular cross arm 4 includes three tension screws 13, one end of the three tension screws 13 is mounted on the triangular cross arm 4, and the other end is connected to the chuck 7 respectively, to ensure that the chuck 7 is parallel to the triangular cross arm 4. A first fixed bracket 14 and a second fixed bracket 15 are fixedly mounted on the three tension screws 13, the first fixed bracket 14 and the second fixed bracket 15 are respectively mounted at the two end positions of the through-type jack 5, and a mounting plate 16 is provided on the upper part of the first fixed bracket 14 and the second fixed bracket 15. The chuck 7 is fixedly connected to the outer cylinder of the through-type jack 5, which can ensure that when the rigid wheel is disassembled, the middle cylinder of the through-type jack 5 can simultaneously drive the screw sleeve 41 and the long screw 6 to move, so that the rigid wheel to be disassembled moves relative to its support shaft, thereby achieving the purpose of wheel disassembly.

[0024] Preferably, Figure 4 and Figure 6 As shown, the mounting frame is provided with a guide connection block 17, a guide groove 18 is provided in the guide connection block 17, a strip hole 39 is provided on the top of the guide connection block 17, the strip hole 39 is communicated with the guide groove 18, and the width of the strip hole 39 is smaller than the width of the guide groove 18. The guide groove 18 is provided with an adjusting screw 19 and a movable support 20, the adjusting screw 19 is threadedly connected with the movable support 20, the upper part of the movable support 20 extends out of the strip hole 39 and can be connected with the boom 3, and the boom 3 lifts the entire disassembly device through the movable support 20. Guide blocks or needle roller bearings 21 are installed on both sides of the movable support 20, the guide blocks or needle roller bearings 21 are located in the guide groove 18, the movable support 20 cooperates with the guide groove 18 and can slide in the guide groove 18, and the guide blocks or needle roller bearings 21 can reduce the friction during sliding. The position of the movable support 20 in the guide groove 18 can be adjusted by rotating the adjusting screw 19. When it is necessary to replace a different working surface to remove the wheel pin, the adjusting screw 19 can be rotated to adjust the position of the movable support 20 to ensure that the center of gravity of the disassembly device is in a suitable position during work to avoid the device from tipping over.

[0025] Preferably, Figure 7 As shown, a joint bearing 22 is installed on the upper part of the movable support 20, and a bearing inner ball 23 is arranged in the joint bearing 22. This ensures that the connection between the disassembly device and the boom 3 can rotate slightly in any direction in space, and even if the working surface is not flat enough, it can ensure that the long screw 6 and the wheel pin to be disassembled are coaxial, ensuring the normal progress of the disassembly operation.

[0026] Preferably, Fig.10 As shown, the boom 3 is connected to the mounting frame through a suspension mechanism 25, and the suspension mechanism 25 includes a lower protective cover 26, an upper protective cover 27, a rotating shaft 24 and a supporting spring 28. The lower protective cover 26 is connected to the boom 3, and the upper protective cover 27 is sleeved on the lower protective cover 26. The lower protective cover 26 is provided with a supporting spring 28, and the top of the supporting spring 28 is connected to the upper protective cover 27. The lower end opening of the upper protective cover 27 is covered on the outer periphery of the lower protective cover 26, and the rotating shaft 24 is vertically installed on the upper protective cover 27. The rotating shaft 24 passes through the lower protective cover 26 and the boom 3 and is connected to the mounting frame. The disassembly device at the lower part drives the upper protective cover 27 to move downward through the rotating shaft 24. Under the action of the internal supporting spring 28, the disassembly device can undergo elastic fluctuations in the vertical direction to ensure that the long screw 6 and the wheel pin to be disassembled remain coaxial.

[0027] Preferably, an adjusting nut 29 is installed on the rotating shaft 24, and a thrust bearing 40 is provided between the adjusting nut 29 and the top of the upper protective cover 27. The rotating shaft 24 is threadedly connected to the adjusting nut 29. By rotating the adjusting nut 29, the distance that the rotating shaft 24 extends out of the boom 3 can be adjusted. At the same time, due to the presence of the thrust bearing 40, it can be ensured that when the vertical position of the rotating shaft 24 is adjusted, the rotating shaft 24 and the mounting frame can still rotate horizontally relative to the boom 3, thereby ensuring that the disassembly device and the wheel pin to be disassembled are at the same height.

[0028] Preferably, Fig. 9 and Fig.11 As shown, a parallelogram lifting mechanism 32 is provided on the upper part of the vertical frame 2, and the lower end of the parallelogram lifting mechanism 32 is hinged on the vertical frame 2. The upper end is a boom bracket 33, and the boom bracket 33 is installed with a boom shaft 30 and a limit block 31. The boom 3 is connected to the boom bracket 33 through the boom shaft 30. The limit block 31 is located on one side of the boom 3 to limit the horizontal swing range of the boom 3. A connecting pipe 34 is provided on the parallelogram lifting mechanism 32, and a manual hydraulic cylinder 35 is hinged on the carrier frame 1, and the piston rod of the manual hydraulic cylinder 35 is hinged to the connecting pipe 34.

[0029] The parallelogram lifting mechanism 32 can move the boom bracket 33 up and down under the drive of the manual hydraulic cylinder 35, thereby changing the position of the disassembly device on the boom 3 in the vertical direction, and the boom rotating shaft 30 can adjust the position of the disassembly device within a horizontal range, thereby ensuring that the disassembly device can be adjusted in all directions in a three-dimensional space. When the dual-mode wheel pin disassembly machine is not in use, the parallelogram lifting mechanism 32 can be adjusted to place the disassembly device on the carrier 1. When in use, the manual hydraulic cylinder 35 is supplied with oil, and the parallelogram lifting mechanism 32 and the rotating shaft 30 are adjusted to place the disassembly device in a suitable disassembly position.

[0030] Preferably, the four corners of the bottom surface of the carrier frame 1 are respectively provided with running wheels 36, so that the carrier frame 1 can be more conveniently moved to different dismantling positions.

[0031] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A dual-mode wheel pin removal machine, characterized in that: The invention comprises a bearing frame (1), a vertical frame (2) is installed on one side of the bearing frame (1), a suspension arm (3) is arranged on the vertical frame (2), a disassembly device is horizontally installed at the lower part of the front end of the suspension arm (3) through a suspension mechanism (25); the disassembly device comprises a mounting frame, the mounting frame is connected to the lower part of the suspension arm (3), a through-type jack (5) is arranged in the mounting frame, a long screw rod (6) is installed in the through-type jack (5), one end of the long screw rod (6) is connected to a screw sleeve (41) through a thread, and the other end is connected to a transition screw shaft (42) through a thread; one end of the screw sleeve (41) is connected to the transition screw shaft (42) through a thread; The end faces of the middle cylinders of the through-type jack (5) are in contact but not connected; a triangular cross arm (4) is installed at one end of the mounting frame, a top cylinder (8) is connected to the outer side of the triangular cross arm (4), one end of the long screw (6) passes through the triangular cross arm (4) and enters the top cylinder (8), a chuck (7) is installed at the other end of the mounting frame, the other end of the long screw (6) passes through the chuck (7), and the long screw (6) can be rotated to make its front end contact with the support shaft of the rigid wheel to be disassembled, and the outer end of the claw (37) of the chuck (7) is provided with a positioning tooth (38), and the mounting frame can rotate horizontally relative to the boom (3).

2. A dual-mode wheel pin removal machine according to claim 1, characterized in that: A top tube baffle (9) is provided between the triangular cross arm (4) and the top tube (8), the top tube baffle (9) is mounted on the triangular cross arm (4), a gasket is provided between the top tube baffle (9) and the triangular cross arm (4), a certain distance is left, a through hole with a notch (10) is provided on the top tube baffle (9), a positioning block (11) is provided on the inner end surface of the top tube (8), the positioning block (11) is matched with the notch (10), and the through hole can accommodate the top tube (8) to pass through.

3. A dual-mode wheel pin removal machine according to claim 1, characterized in that: The mounting frame comprises three tension screws (13), one end of the three tension screws (13) is mounted on the triangular cross arm (4), and the other ends are respectively connected to the chucks (7), a first fixing bracket (14) and a second fixing bracket (15) are fixedly mounted on the three tension screws (13), the first fixing bracket (14) and the second fixing bracket (15) are respectively mounted at the two end positions of the through-type jack (5), and a mounting plate (16) is provided on the upper part of the first fixing bracket (14) and the second fixing bracket (15).

4. A dual-mode wheel pin removal machine according to claim 1, characterized in that: The mounting frame is provided with a guide connection block (17), a guide groove (18) is provided in the guide connection block (17), a strip hole (39) is provided at the top of the guide connection block (17), the strip hole (39) is communicated with the guide groove (18), the width of the strip hole (39) is smaller than the width of the guide groove (18), an adjustment screw (19) and a movable support (20) are installed in the guide groove (18), the adjustment screw (19) is threadedly connected to the movable support (20), the upper part of the movable support (20) extends out of the strip hole (39) and is connected to the boom (3), guide blocks or needle bearings (21) are installed on both sides of the movable support (20), the guide blocks or needle bearings (21) are located in the guide groove (18), the movable support (20) cooperates with the guide groove (18) and can slide in the guide groove (18), and the position of the movable support (20) in the guide groove (18) can be adjusted by rotating the adjustment screw (19).

5. A dual-mode wheel pin removal machine according to claim 4, characterized in that: A joint bearing (22) is installed on the upper part of the movable support (20), and is connected to the boom (3) via the joint bearing (22).

6. A dual-mode wheel pin removal machine according to claim 1, characterized in that: The suspension arm (3) is connected to the mounting frame via a suspension mechanism (25); the suspension mechanism (25) comprises a lower protective cover (26), an upper protective cover (27), a rotating shaft (24) and a supporting spring (28); the lower protective cover (26) is connected to the suspension arm (3); the upper protective cover (27) is mounted on the lower protective cover (26); a supporting spring (28) is arranged inside the lower protective cover (26); the top of the supporting spring (28) is connected to the upper protective cover (27); the lower end opening of the upper protective cover (27) is covered on the outer periphery of the lower protective cover (26); the rotating shaft (24) is vertically mounted on the upper protective cover (27); the rotating shaft (24) passes through the lower protective cover (26) and the suspension arm (3) and is connected to the mounting frame.

7. A dual-mode wheel pin removal machine according to claim 6, characterized in that: An adjusting nut (29) is mounted on the rotating shaft (24), a thrust bearing (40) is arranged between the adjusting nut (29) and the top of the upper protective cover (27), the rotating shaft (24) and the adjusting nut (29) are threadedly connected, and the lower end of the rotating shaft (24) is connected to the mounting frame.

8. The dual-mode wheel pin removal machine according to claim 1, characterized in that: A parallelogram lifting mechanism (32) is provided on the upper part of the vertical frame (2). The lower end of the parallelogram lifting mechanism (32) is hinged on the vertical frame (2), and the upper end is a boom bracket (33). The boom bracket (33) is installed with a boom rotating shaft (30) and a limit block (31). The boom (3) is connected to the boom bracket (33) via the boom rotating shaft (30). The limit block (31) is located on one side of the boom (3) to limit the horizontal swing range of the boom (3). A connecting pipe (34) is provided on the parallelogram lifting mechanism (32). A manual hydraulic cylinder (35) is hinged on the support frame (1), and a piston rod of the manual hydraulic cylinder (35) is hinged to the connecting pipe (34).

9. The dual-mode wheel pin removal machine according to claim 1, characterized in that: Travel wheels (36) are respectively installed at the four corners of the bottom surface of the carrier frame (1).

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