Pin shaft dismounting device and pin shaft dismounting system comprising same

Abstract

The utility model relates to a pin shaft dismounting device and a pin shaft dismounting system comprising the same. The pin shaft dismounting device comprises a shell, one end of the shell is used for abutting against equipment with a pin shaft to be dismounted, the other end of the shell is provided with a piston rod cavity and a piston head cavity which are communicated, and when the shell abuts against the equipment, the piston rod cavity is close to the equipment, and the piston head cavity is far away from the equipment; the piston is provided with a piston head and a piston rod, the piston head and the piston rod are suitable for being embedded into the piston head cavity and the piston rod cavity of the shell, the piston can axially move relative to the shell, and during axial movement, the piston head and the piston head cavity form a high-pressure cavity; and the drawing bolt is provided with a bolt head and a screw rod, the drawing bolt is used for being connected with the pin shaft, and the drawing bolt is embedded and fixedly installed in the piston, so that the drawing bolt and the piston form a whole. The pin shaft dismounting device is compact in structure, small and exquisite, convenient to carry and flexible to use.

Description

Technical Field

[0001] The utility model relates to the field of pressure-fit disassembling devices, in particular to a pin disassembling device and a pin disassembling system comprising the same. Background Art

[0002] When large equipment such as coal mining machines, hydraulic supports, and tunneling machines are inspected and disassembled, it is often necessary to disassemble their pins. However, due to the equipment use environment, especially the underground environment, the disassembly work space is small, making the inspection and disassembly work extremely difficult.

[0003] However, the existing pin disassembly device is large, heavy and not easy to carry. Moreover, the pin of large equipment is very long, for example, the pin of a coal mining machine can reach 10 meters to 20 meters. The existing pin disassembly device cannot disassemble the long pin conveniently and quickly, and cannot cope with the situation where the pin disassembly thread pair fails. Utility Model Content

[0004] In view of this, the utility model provides a pin disassembly device and a pin disassembly system including the same, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] In order to achieve the above-mentioned object, the first aspect of the present utility model provides a pin shaft disassembly device, the pin shaft disassembly device comprising:

[0006] A shell, one end of which is used to abut against a device having a pin shaft to be disassembled, and the other end of which has a piston rod cavity and a piston head cavity communicating with each other, wherein when the shell abuts against the device, the piston rod cavity is close to the device, and the piston head cavity is away from the device;

[0007] A piston, wherein the piston has a piston head and a piston rod, wherein the piston head and the piston rod are adapted to be embedded in the piston head cavity and the piston rod cavity of the housing, and the piston can move axially relative to the housing, and during axial movement, the piston head and the piston head cavity form a high-pressure cavity; and

[0008] A pull bolt having a bolt head and a screw rod, the pull bolt is used to connect the pin shaft, the pull bolt is embedded in and fixedly installed in the piston, so that the pull bolt and the piston form a whole.

[0009] In the pin shaft disassembly device as described above, optionally, the piston rod of the piston has a bolt through hole, and the piston head has a groove, the bolt through hole is communicated with the groove, the screw rod of the pull bolt can be fixedly installed in the bolt through hole and extend out of the bolt through hole, and the groove is open to the outside.

[0010] In the pin removal device as described above, optionally, the piston head cavity is opened outward to expand the axial movement range of the piston head.

[0011] In the pin removal device as described above, optionally, the end surface of the piston head cavity is flush with the end surface of the piston head when it is fully embedded in the groove of the piston head cavity.

[0012] In the pin removal device as described above, optionally, the end surface of the piston head cavity is flush with the end surface of the piston head when it moves axially to the extreme position.

[0013] In the pin disassembly device as described above, optionally, the shell also has a pin cavity, the pin cavity is communicated with the piston rod cavity, the pulling bolt and the pin are fixedly connected in the pin cavity, and the pin cavity is used to increase the pulling distance during the pin disassembly process.

[0014] In the pin shaft disassembly device as described above, optionally, the piston head of the piston also has a pipeline and a pipeline joint, the pipeline axially penetrates the piston head and is connected to the piston head cavity, the pipeline and the pipeline joint are used to introduce high-pressure medium into the high-pressure cavity, so that the high-pressure medium drives the piston to move axially by pushing the piston head.

[0015] In order to achieve the aforementioned objectives, the second aspect of the utility model provides a pin disassembly system, which includes a pin disassembly device as described in any one of the aforementioned first aspects, wherein the shell of the pin disassembly device is connected to the equipment; the pin has a threaded pair, and the puller bolt is fixedly connected to the threaded pair.

[0016] In the pin disassembly system as described above, optionally, the pin disassembly device is further provided with a pipe and a pipe joint thereof;

[0017] The pin removal system further comprises a high-pressure power source, which is connected to the pipe joint of the pin removal device, so that the high-pressure medium in the high-pressure power source is introduced into the piston head cavity to promote the axial movement of the piston;

[0018] The pin disassembly system also includes a plurality of adjustment pads, which are placed between the pin disassembly device and the equipment to increase the distance that the pin is pulled during the disassembly process.

[0019] In the pin shaft disassembly system as described above, optionally, the bolt head of the pull bolt is located at the piston head, the screw rod passes through and extends out of the piston rod, and the extended portion of the screw rod is fixedly connected with the pin shaft thread;

[0020] Or the bolt head is welded and fixed to the pin shaft, and the screw rod passes through the piston rod and extends to be fixed in the piston head.

[0021] The utility model provides a pin disassembly device, wherein the housing, piston and pull bolt of the pin disassembly device are sleeved and installed, so that the whole pin disassembly device is compact, small, easy to carry and flexible to use. The pull bolt is used to connect with the pin to be disassembled, and can drive the pin to be separated from its device with the axial movement of the piston.

[0022] The utility model further provides a pin disassembly system, which includes the above-mentioned pin disassembly device, and thus also has its corresponding advantages. The pin disassembly system can also select the installation method of the pull bolt according to the effective or ineffective condition of the pin thread pair, so that the pin disassembly system can adapt to more pin disassembly situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0024] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the pin disassembly device of the utility model, wherein a pull bolt is shown;

[0025] Figure 2 for Figure 1 A cross-sectional schematic diagram of another installation method of a pull-out bolt of an embodiment of a pin disassembly device;

[0026] Figure 3 It is a cross-sectional schematic diagram of the pin shaft disassembly system of the present utility model.

[0027] Figure markings: 1-pin disassembly device; 2-housing; 21-pin cavity; 22-piston rod cavity; 23-piston head cavity; 24-sealing ring; 3-piston; 31-piston rod; 32-piston head; 33-bolt through hole; 34-pipe joint; 35-pipe; 36-groove; 4-pull bolt; 41-bolt head; 42-screw; 43-gasket; 44-nut; 5-high-pressure cavity; 6-high-pressure power source; 7-adjusting pad; 8-equipment; 9-pin; 91-threaded pair. DETAILED DESCRIPTION

[0028] With reference to the accompanying drawings and specific embodiments, the structure, composition, characteristics and advantages of the pin disassembly device of the present invention and the pin disassembly system including the same will be described below in an exemplary manner. However, all descriptions should not be used to form any limitation on the present invention.

[0029] In addition, for any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature displayed or implied in the drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacles, and thus it should be considered that these more embodiments according to the present invention are also within the scope of the description in this document.

[0030] It should also be noted that the orientation or positional relationship indicated by the terms "inside" and "outside" is based on the orientation or positional relationship of the pin shaft disassembly device shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0031] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the pin shaft disassembly device of the utility model.

[0032] from Figure 1 As can be seen from the embodiment, the pin shaft disassembly device 1 includes a housing 2, a piston 3 and a pull bolt 4, wherein the piston 3 is used to embed and install the pull bolt 4, and the pull bolt 4 is used to engage with the pin shaft 9 to be disassembled (such as Figure 3 The housing 2 is fixedly connected to the device 8 having the pin 9 to be disassembled, one end of the housing 2 is used to abut against the device 8 having the pin 9 to be disassembled, and the other end of the housing 2 is used to embed and install the piston 3. Specifically, during disassembly, the housing 2 is tightly abutted against the device 8, and the piston 3 moves axially relative to the housing 2, and the pin 9 is driven by the pull bolt 4 embedded therein, so that the pin 9 is separated from the device 8, thereby completing the disassembly of the pin 9. The design of the piston 3 being located at the other end of the housing 2 can make the piston 3 have a larger axial movement range relative to the housing 2, thereby increasing the distance the pin is pulled during the disassembly process.

[0033] The shell 2 can be tightly connected to the device 8 by gravity, hand support or magnetic attraction, so as to keep the shell 2 relatively fixed to the device 8 in the radial direction, so that the axial movement of the piston 3 relative to the shell 2 is smoother, thereby making the disassembly process of the pin shaft 9 smoother.

[0034] from Figure 1 It can be seen that the piston 3 of the pin removal device 1 is embedded in the housing 2 and can move axially relative to the housing 2. The design of the piston 3 being embedded in the housing 2 can make the entire pin removal device 1 compact, small, flexible to use, and easy to carry. The housing 2 can be a cylinder, which is convenient to grasp and carry. In other embodiments, the shape of the housing 2 can be, for example, but not limited to, a cube, a truncated cone, etc.

[0035] Specifically, the other end of the housing 2 opposite to the abutting end of the device has a piston rod cavity 22 and a piston head cavity 23 that communicate with each other, and the piston 3 has a piston rod 31 and a piston head 32, and the piston rod 31 and the piston head 32 are respectively suitable for being embedded in the piston rod cavity 22 and the piston head cavity 23. As can be seen from the figure, the diameter of the piston head 32 is larger than the direct diameter of the piston rod 31, and accordingly, the inner diameter of the piston head cavity 23 is larger than the inner diameter of the piston rod cavity 22.

[0036] When the piston 3 moves axially, it can move toward the piston head 32 or toward the piston rod 31. When the piston 3 moves axially toward the piston rod 31, the piston head 32 with a larger diameter is limited to the piston head cavity 23, so that the piston 3 is completely embedded in the housing 2.

[0037] It should be noted that the axial movement direction of the piston 3 that separates the pull pin 9 from the device 8 is to move toward the piston head 32, that is, when the housing 2 is connected to the device 8 (such as Figure 3 As shown in the figure, the piston rod cavity 22 is close to the device 8, and the piston head cavity 23 is away from the device 8. The piston 3 is arranged in this direction, so that the piston 3 can be completely embedded in the shell 2 to fully utilize the internal space of the shell 2, making the internal structure of the pin removal device 1 more compact, thereby reducing the overall volume of the pin removal device 1.

[0038] Furthermore, the housing 2 also has a pin cavity 21, which is communicated with the piston rod cavity 22. The pull bolt 4 is fixedly connected to the pin 9 in the pin cavity 21, thereby protecting the connection between the pull bolt 4 and the pin 9. The pin cavity 21 can guide the pin 9 to move axially therein along with the piston 3, and increases the distance that the pin 9 is pulled during the disassembly process, thereby making the pin disassembly faster and improving the efficiency of the pin disassembly.

[0039] As shown in the figure, the piston head cavity 23 is open, so that the piston 3 has a larger movement space when moving axially, so that the pin can be pulled and disassembled to a greater extent.

[0040] In one embodiment, when the piston head 32 of the piston 3 is fully embedded in the piston head cavity 23, the end surface of the piston head 32 is flush with the end surface of the piston head cavity 23, thereby reducing the overall volume of the pin removal device 1 and saving materials for manufacturing the pin removal device, thereby making the pin removal device 1 light and convenient to carry.

[0041] When the piston head 32 moves axially toward the piston head 32 , the end surface of the piston head 32 exceeds the end surface of the housing 2 , and the axial movement of the piston 3 can be observed from the outside to understand and control the progress of the disassembly of the pin shaft 9 .

[0042] In another embodiment, the piston head cavity 23 can also extend to the extreme position of the axial movement of the piston 3, so that when the piston 3 moves axially, it can move in the piston head cavity 23 to limit the radial movement range of the piston 3, ensuring that the pulling force on the pin shaft is always along the axial direction. At the same time, it can also protect the piston 3 from external contamination, thereby extending its service life.

[0043] The limit position is when the piston 3 moves axially to the end of its piston rod 31 to the piston rod cavity 22 close to the piston head cavity 23 but not out of the piston rod cavity 22. Therefore, in some embodiments, a limit portion may also be provided at the piston rod cavity 22 to limit the range of motion of the piston 3.

[0044] It can also be seen from the figure that the piston rod 31 of the piston 3 has a bolt through hole 33, and its piston head 32 has a groove 36, and the groove 36 is communicated with the bolt through hole 33. The pull bolt 4 has a bolt head 41 and a screw rod 42, and the screw rod 42 can be fixedly installed in the bolt through hole 33 and extend out of the bolt through hole 33.

[0045] exist Figure 1 In the embodiment of the present invention, the pull bolt 4 is fixedly installed in the bolt through hole 33, the bolt head 41 is located in the groove 36, and the screw 42 passes through the bolt through hole 33 and extends to the pin cavity 21, so that the extended portion of the pull bolt 4 can be fixedly connected to the pin 9 to be removed. As can be seen from the figure, the groove 36 is open to the outside, so that the pull bolt 4 can be easily installed in the piston 3 from the outside.

[0046] In another embodiment, the pull bolt 4 can also be reversely fixedly installed in the bolt through hole 33 (such as Figure 2 The specific connection method will be described below. Figure 2 The details are described in the embodiments of the present invention.

[0047] The pull bolt 4 is integrated with the piston 3, which can make the entire pin removal device 1 more compact, small, light and easy to carry. Figure 3 As shown), the pull bolt 4 is adapted so that the pull bolt 4 can be screwed and fixed with the pin shaft 9 to be removed.

[0048] Moreover, the pull bolt 4 is formed integrally with the piston 3, so that the pull bolt 4 can move axially synchronously with the piston 3 and have the same axial stroke as the piston 3, that is, the pull force applied to the piston 3 is equivalent to that applied to the pull bolt 4, thereby making the pin shaft disassembly process more efficient.

[0049] A gasket 43 may also be used between the bolt head 41 and the bolt through hole 33 to increase the firmness of the connection between the bolt 41 and the piston rod 31 and prevent loosening.

[0050] The screw rod 42 and the bolt through hole 33 may be fixedly installed in a manner including, but not limited to, threaded fixing, welding fixing, or fixing the extended portion of the pull bolt 4 to the piston rod 31 via a nut.

[0051] Further, as shown in the figure, a pipeline 35 and a pipeline joint 34 may be provided at the piston head 32 of the piston 3, and the pipeline 35 axially penetrates the piston head 32 and is connected to the piston head cavity 23. A high-pressure medium may be injected through the pipeline 35, and the high-pressure medium enters the piston head cavity 23, so that a gap is generated between the piston head cavity 23 and the piston head 32 to form a high-pressure cavity 5.

[0052] The axial distance of the high-pressure medium injected into the high-pressure chamber 5 is the axial movement distance of the piston 3, and the piston rod 31 moves axially along the piston rod chamber 22. As the high-pressure medium is continuously injected into the high-pressure chamber 5, the high-pressure medium in the high-pressure chamber 5 drives the piston 3 to move axially in the direction of the piston head 32 by pushing the piston head 32, thereby pulling the pin shaft through the pull bolt 4 fixedly installed in the piston 3 to remove the pin shaft.

[0053] Moreover, as shown in the figure, sealing rings 24 are provided at the piston rod cavity 22 and the piston head cavity 23 to prevent leakage of the injected high-pressure medium and maintain the high pressure of the high-pressure medium to push the piston 3 to move axially, thereby ensuring that there is sufficient pressure to drive the puller bolt 4 to remove the pin shaft.

[0054] The high pressure medium may be high pressure oil, and accordingly, the pipe joint 34 is an oil nozzle joint, and the pipe 35 is an oil pipeline. The high pressure medium may also be high pressure gas, and accordingly, the pipe joint 34 is a gas joint, and the pipe 35 is a gas pipeline.

[0055] It should be noted that in some equipment such as coal mining machines, the pin to be disassembled is relatively long, and usually requires multiple pulling of the piston 3 to completely disassemble it. Therefore, the length of the piston rod 31 can be set according to the specific situation. When ensuring that the external pulling force is sufficient, the length of the piston rod 31 can be lengthened to reduce the number of pulling times of the piston 3, thereby shortening the time for disassembling the pin.

[0056] Figure 2 for Figure 1 A cross-sectional schematic diagram of the reverse installation of a pull bolt of an embodiment of a pin removal device.

[0057] As can be seen from the figure, the pull bolt 4 and Figure 1The piston 3 is fixedly installed in the middle reverse direction. Specifically, the bolt head 41 of the pull bolt 4 is located in the pin shaft cavity 21, and the screw rod 42 is fixedly installed in the bolt through hole 33 and extends through the bolt through hole 33 to the groove 36 of the piston head 32. Further, a nut 44 can be provided at the groove 36, and the nut 44 is used to strengthen the connection between the pull bolt 4 and the piston rod 31. The nut 44 can be a high-strength nut, which further strengthens the connection between the pull bolt 4 and the piston rod 31, so that the pin shaft can be disassembled more reliably and smoothly.

[0058] It should be noted that no matter how the bolt 4 is pulled out, Figure 1 Connect with piston 3 or as Figure 2 The pull bolt 4 is connected with the piston 3, and the pull bolt 4 is embedded in the piston 3 and fixed with the piston 3 to form an integral body, which reduces the volume of the pin removal device 1 as a whole, making the entire pin removal device 1 delicate in structure. The pull bolt 4 can move axially synchronously with the piston 3, eliminating the loss of force transmission, thereby making the pin removal process faster, more convenient and more efficient.

[0059] Figure 3 It is a schematic diagram of the pin shaft disassembly system of the present utility model.

[0060] As can be seen from the figure, the pin disassembly system includes a pin disassembly device 1, which is connected to the equipment 8.

[0061] As shown in the figure, the pin disassembly device 1 is disassembling the pin 9 from the device 8. Specifically, the device 8 has a pin 9 to be disassembled, and the pin 9 has a thread pair 91. As can be seen from the figure, the thread pair 91 is a blind hole located at the end of the pin 9, and the thread pair 91 is used to be fixedly connected with the pull bolt 4. The pull bolt 4 can be selected and adapted according to the thread shape and length of the thread pair 91 of the pin 9 to be disassembled.

[0062] During disassembly, the housing 2 of the pin disassembly device 1 is connected to the equipment 8, and the selected puller bolt 4 is fixedly connected to the pin 9 through threads and fixedly installed on the piston 3 of the pin disassembly device 1. The piston head 32 of the piston 3 is pulled by external force, so that the piston 3 moves axially relative to the housing 2, so as to drive the puller bolt 4 installed in the piston 3, thereby driving the pin 9 to separate from the equipment 8, and realizing the disassembly of the pin 9.

[0063] When the pin 9 to be disassembled is long and the piston 3 moves to the limit but does not completely disassemble the pin 9, multiple adjustment pads 7 can be placed between the pin disassembly device 1 and the equipment 8 as shown in the figure to increase the distance for pulling the pin 9.

[0064] During disassembly, first reset the piston 3, that is, completely embed the piston head 32 into the piston head cavity 23, apply external force to pull the piston 3 to its axial movement limit position; after placing multiple adjustment pads 7 between the pin disassembly device 1 and the equipment 8, reset the piston 3, apply external force to pull the piston again, and repeat the above actions until the pin 9 is completely disassembled. The adjustment pad 7 can be in the form of, but not limited to, a washer, a pad, etc., and the material of the adjustment pad 7 can be, but not limited to, wood, plastic, or other pressure-resistant materials.

[0065] The applied external force may be, but is not limited to, motor power, or may be a high-pressure power source 6 as shown in the figure. Specifically, the pipe joint 34 of the pin disassembly device 1 is connected to the high-pressure power source 6, and the high-pressure medium in the high-pressure power source 6 is introduced into the high-pressure chamber 5 formed by the piston head 32 and the piston head chamber 23 to push the piston head 32, thereby driving the entire piston 3 to move axially. When pulling out the long pin, the piston 3 can be reset by unloading the high-pressure medium in the high-pressure chamber 5, and after adding the adjustment pad 7, the above actions are repeated until the pin 9 is completely disassembled.

[0066] The high-pressure power source 6 can be a high-pressure oil pump, and the high-pressure medium is high-pressure oil; the high-pressure power source 6 can also be a high-pressure gas pump, and the high-pressure medium is high-pressure gas. In the mine, in order to prevent explosion, the high-pressure power source 6 can also be a manual device.

[0067] Due to factors such as equipment aging and environmental corrosion, the thread pair 91 of the pin shaft 9 to be disassembled may fail. The pin shaft disassembly system of the utility model is applicable to both effective and failed thread pairs 91 of the pin shaft 9. The specific usage is as follows:

[0068] When the thread pair 91 of the pin 9 is effective, the puller bolt 4 is connected to the pin removal device 1 as shown in the figure, that is, the bolt head 41 of the puller bolt 4 is located in the groove 36 of the piston head 32 of the piston 3, and its screw rod 42 extends through the bolt through hole 33 of the piston rod 31 to the pin cavity 21, and a section of the screw rod 42 extending is fixedly connected to the pin 9 to be removed, so that the puller bolt 4 fixes the pin 9 and the piston 3, and can move axially with the piston 3, thereby driving the pin 9 to disengage from the equipment 8.

[0069] When the thread pair 91 of the pin 9 fails, you can use Figure 2 The connection method between the pull bolt 4 and the pin shaft disassembly device 1 is that the bolt head 41 of the pull bolt 4 is welded and fixed to the pin shaft 9 to be disassembled (not shown in the figure), and the screw rod 42 extends through the bolt through hole 33 to the groove 36, so that the pull bolt 4 fixes the pin shaft 9 and the piston 3, and can move axially with the piston 3, thereby driving the pin shaft 9 to disengage from the equipment 8.

[0070] The pin removal device of the utility model comprises a housing, a piston and a pull bolt, wherein the pull bolt is used to fix and connect the pin to be removed. The pull bolt is embedded in the piston and is embedded in the housing through the piston sleeve, so that the pull bolt can move axially with the piston to pull the pin to be removed. The sleeve arrangement of the housing, the piston and the pull bolt can make the pin removal device compact, light and easy to carry.

[0071] The utility model further provides a pin shaft disassembly system, which connects a pin shaft disassembly device with a high-pressure power source and a device having a pin shaft to be disassembled, and wherein a puller bolt is fixedly connected to the pin shaft to be disassembled, and the piston of the pin shaft disassembly device is pushed to move by the high-pressure medium in the high-pressure power source, thereby realizing the disassembly of the pin shaft.

[0072] The utility model also provides two installation modes of the pull bolt, namely, forward and reverse, and can be installed according to whether the thread pair of the pin shaft is effective or ineffective, thereby breaking through the use limitation of the pin shaft disassembly system.

[0073] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A pin disassembly device, characterized in that: The pin shaft disassembly device (1) comprises: A shell (2), one end of the shell (2) being used to abut against a device (8) having a pin shaft (9) to be disassembled, and the other end of the shell (2) having a piston rod cavity (22) and a piston head cavity (23) communicating with each other, wherein when the shell (2) abuts against the device (8), the piston rod cavity (22) is close to the device (8), and the piston head cavity (23) is far away from the device (8); A piston (3), the piston (3) comprising a piston head (32) and a piston rod (31), the piston head (32) and the piston rod (31) being adapted to be embedded in the piston head cavity (23) and the piston rod cavity (22) of the housing (2), and the piston (3) being capable of axial movement relative to the housing (2), wherein during axial movement, the piston head (32) and the piston head cavity (23) form a high-pressure cavity (5); and A pull bolt (4), the pull bolt (4) having a bolt head (41) and a screw rod (42), the pull bolt (4) being used to connect the pin shaft (9), the pull bolt (4) being embedded in and fixedly installed in the piston (3), so that the pull bolt (4) and the piston (3) are integrated.

2. The pin disassembly device according to claim 1, characterized in that: The piston rod (31) of the piston (3) has a bolt through hole (33), and the piston head (32) has a groove (36), the bolt through hole (33) is in communication with the groove (36), the screw rod (42) of the pull bolt (4) can be fixedly mounted in the bolt through hole (33) and extend out of the bolt through hole (33), and the groove (36) is open outwards.

3. The pin disassembly device according to claim 2, characterized in that: The piston head cavity (23) is open outwards to expand the axial movement range of the piston head (32).

4. The pin removal device according to claim 3, characterized in that: The end surface of the piston head cavity (23) is flush with the end surface of the piston head (32) when it is fully embedded in the piston head cavity (23).

5. The pin removal device according to claim 3, characterized in that: The end surface of the piston head cavity (23) is flush with the end surface of the piston head (32) when the piston head (32) moves axially to the extreme position.

6. The pin removal device according to claim 1, characterized in that: The housing (2) further comprises a pin shaft cavity (21), wherein the pin shaft cavity (21) is communicated with the piston rod cavity (22), the pull bolt (4) and the pin shaft (9) are fixedly connected in the pin shaft cavity (21), and the pin shaft cavity (21) is used to increase the pulling distance of the pin shaft (9) during the disassembly process.

7. The pin removal device according to claim 1, characterized in that: The piston head (32) of the piston (3) is also provided with a pipeline (35) and a pipeline joint (34). The pipeline (35) axially penetrates the piston head (32) and is connected to the piston head cavity (23). The pipeline (35) and the pipeline joint (34) are used to introduce a high-pressure medium into the high-pressure cavity (5), so that the high-pressure medium drives the piston (3) to move axially by pushing the piston head (32).

8. A pin disassembly system, characterized in that: The pin disassembly system comprises a pin disassembly device (1) as described in any one of claims 1 to 7, wherein the housing (2) of the pin disassembly device (1) is connected to the device (8); the pin (9) has a threaded pair (91), and the puller bolt (4) is fixedly connected to the threaded pair (91).

9. The pin removal system according to claim 8, characterized in that: The pin shaft disassembly device (1) is further provided with a pipeline (35) and a pipeline joint (34); The pin removal system further comprises a high-pressure power source (6), wherein the high-pressure power source (6) is connected to the pipe joint (34) of the pin removal device (1), so that the high-pressure medium in the high-pressure power source (6) is introduced into the piston head cavity (23) to drive the piston (3) to move axially; The pin disassembly system further comprises a plurality of adjustment pads (7), wherein the adjustment pads (7) are placed between the pin disassembly device (1) and the equipment (8) to increase the distance that the pin (9) is pulled during the disassembly process.

10. The pin removal system according to any one of claims 8 or 9, characterized in that: The bolt head (41) of the pull bolt (4) is located on the piston head (32), the screw rod (42) passes through and extends out of the piston rod (31), and the extended portion of the screw rod (42) is threadedly fixedly connected to the pin shaft (9); Alternatively, the bolt head (41) is welded and fixed to the pin shaft (9), and the screw rod (42) passes through the piston rod (31) and extends and is fixed inside the piston head (32).

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