Pin disassembling and assembling tool

Abstract

The present invention relates to the technical field of pin extraction devices, and provides a pin disassembling and assembling tool, which includes a support frame, a hydraulic cylinder and a support pad. The hydraulic cylinder is arranged on the support frame, the cylinder barrel of the hydraulic cylinder is fixedly connected with the support frame, and a connecting piece is arranged on the piston rod of the hydraulic cylinder, and the connecting piece is arranged to be fixedly connectable with the pin; the support pad has a through space for the piston rod and the pin to pass through along the axial direction of itself, and a notch communicating with the through space is arranged on the support pad, and the notch is arranged to allow at least one of the piston rod and the pin to enter the through space along the radial direction of the piston rod. At least two support pads are provided, and each support pad is selectively sleeved outside the piston rod and the pin, and the support pad can abut against the end of the cylinder barrel and the component connected with the pin. With such a setting, the problem of the large length dimension existing in the disassembly tool for disassembling pins with large length dimensions in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pin pulling devices, and particularly to a pin disassembling and assembling tool. Background Art

[0002] A pin is a type of standardized fastener, mainly used for the rotational connection of two components. The pin connection is a detachable connection, and the disassembly and assembly of the two components can be achieved by disassembling and assembling the pin. For pins under heavy-duty working conditions, the disassembly is difficult, and generally a pin disassembly tool is used for disassembly.

[0003] The existing pin disassembly tools include a hydraulic cylinder and a support sleeve. The piston rod of the hydraulic cylinder can extend into the support sleeve, and the support sleeve is fixedly connected to the cylinder barrel of the hydraulic cylinder. The end of the piston rod of the hydraulic cylinder can be connected to the end of the pin to be disassembled. When disassembling the pin, control the piston rod of the hydraulic cylinder to extend, align the end of the piston rod of the hydraulic cylinder with the pin to be disassembled, and fix the end of the piston rod of the hydraulic cylinder to the pin to be disassembled. Control the piston rod of the hydraulic cylinder to retract, so that the support sleeve abuts against the component connected to the pin to be disassembled. Control the piston rod of the hydraulic cylinder to continue to retract. By generating a pulling force on the pin to be disassembled, the pin to be disassembled can be pulled out. To ensure that the pin to be disassembled can be completely removed, it is necessary to make the stroke of the hydraulic cylinder greater than the length of the pin to be disassembled. For pins with a larger length, it is necessary to select a hydraulic cylinder and a support sleeve with a larger length dimension, resulting in a larger length dimension of the pin disassembly tool, a higher requirement for the space around the pin to be disassembled, and it cannot be applied to the disassembly of pins in a narrow space, and there is also the problem of inconvenient transportation.

[0004] Therefore, how to solve the problem of the large length dimension of the existing disassembly tool for disassembling pins with a large length dimension has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides a pin disassembling and assembling tool to solve the defect of the large length dimension of the existing disassembly tool for disassembling pins with a large length dimension.

[0006] The present invention provides a pin disassembling and assembling tool, including:

[0007] A support frame;

[0008] A hydraulic cylinder, arranged on the support frame, the cylinder barrel of the hydraulic cylinder is fixedly connected to the support frame, and a connecting piece is arranged on the piston rod of the hydraulic cylinder, and the connecting piece is arranged to be fixedly connectable to a pin;

[0009] The supporting cushion block has a through space for the piston rod and the pin shaft to pass through along their own axial directions. A notch communicating with the through space is provided on the supporting cushion block. The notch is arranged to enable at least one of the piston rod and the pin shaft to enter the through space along the radial direction of the piston rod. At least two supporting cushion blocks are provided, and each supporting cushion block can be selectively sleeved outside the piston rod and the pin shaft. The supporting cushion block can abut against the end of the cylinder barrel and the component connected to the pin shaft.

[0010] According to a pin shaft disassembly and assembly tool provided by the present invention, the connecting member is arranged to be connectable to the pin shaft through a thread pair.

[0011] The connecting member is rotatably connected to the piston rod together, and the rotation axis coincides with the axis of the piston rod. A limiting component is arranged between the connecting member and the piston rod. The limiting component is arranged to limit the connecting member from being separated from the piston rod along the direction away from the cylinder barrel.

[0012] According to a pin shaft disassembly and assembly tool provided by the present invention, a first installation hole for the first end of the connecting member to extend into is provided on the piston rod. The limiting component includes:

[0013] A limiting flange is arranged at the first end of the connecting member. The limiting flange is relatively fixed to the connecting member. The connecting member and the limiting flange can rotate and reciprocate in the first installation hole.

[0014] A limiting member is fixedly connected to the piston rod. A through hole for the second end of the connecting member to pass through is provided on the limiting member. The limiting member is arranged to abut against the limiting flange.

[0015] According to a pin shaft disassembly and assembly tool provided by the present invention, it further includes:

[0016] A pressing member is sleeved outside the connecting member and is located on the side of the limiting member away from the cylinder barrel. A first torque hole is provided on the pressing member, and a second torque hole is provided on the connecting member. The axial directions of the first torque hole and the second torque hole are both perpendicular to the axial direction of the piston rod. When the limiting flange and the pressing member both abut against the limiting member, the distance between the first torque hole and the limiting member is equal to the distance between the second torque hole and the limiting member.

[0017] A torque rod can extend into the first torque hole and the second torque hole simultaneously.

[0018] According to a pin shaft disassembly and assembly tool provided by the present invention, the support frame includes:

[0019] A first bracket and a second bracket which are oppositely arranged, the cylinder barrel is arranged between the first bracket and the second bracket, second mounting holes for both ends of the cylinder barrel to extend into are arranged on the first bracket and the second bracket, the end face of the cylinder barrel protrudes from the first bracket and the second bracket, and a limiting structure is arranged between at least one of the first bracket and the second bracket and the cylinder barrel, and the limiting structure is configured to limit the displacement of the cylinder barrel relative to the first bracket and the second bracket along the axial direction of the cylinder barrel itself;

[0020] A fastener for fixedly connecting the first bracket and the second bracket together.

[0021] A pin disassembling and assembling tool according to the present invention further includes:

[0022] A positioning rod which penetrates through the first bracket and the second bracket along the axial direction of the piston rod, and the positioning rod can reciprocally slide relative to the first bracket and the second bracket. A connecting portion for fixedly connecting with the component connected to the pin is arranged at the end of the positioning rod. At least a positioning groove through which the positioning rod can pass is arranged on the supporting cushion block, and the positioning groove is communicated with the penetrating space.

[0023] For a pin disassembling and assembling tool according to the present invention, the positioning rod is configured to be connected with the component connected to the pin through a thread pair, and the positioning rod includes:

[0024] A positioning rod body, a handheld portion is arranged at the first end, and the second end is configured to be connected with the component connected to the pin through a thread pair;

[0025] An extension portion, the first end of which can be threadedly connected with the second end of the positioning rod body, and the second end of the extension portion is configured to be connected with the component connected to the pin through a thread pair.

[0026] A pin disassembling and assembling tool according to the present invention further includes:

[0027] A handle which is arranged between the first bracket and the second bracket. Both ends of the handle are respectively rotatably connected with the first bracket and the second bracket, and the rotation axis is parallel to the axial direction of the piston rod. A cam is arranged on the handle, and the cam is relatively fixed with the handle. The handle can rotate between a first position and a second position. In the first position, the cam presses against the extension portion, and in the second position, the cam is disengaged from the extension portion.

[0028] For a pin disassembling and assembling tool according to the present invention, the supporting cushion block includes:

[0029] The first cushion body and the second cushion body are both arc-shaped. The first cushion body and the second cushion body are oppositely arranged and enclose to form a circular ring shape. One end of the first cushion body is rotatably connected to one end of the second cushion body, and the rotation axis is perpendicular to the plane where the circular ring shape is located.

[0030] A pin shaft disassembly and assembly tool according to the present invention further includes:

[0031] A pull rod, one end of the pull rod is configured to be fixedly connected to the connecting member, the other end of the pull rod is configured to be fixedly connected to the pin shaft, and the cross-sectional dimension of the pull rod is smaller than the cross-sectional dimension of the pin shaft.

[0032] The pin disassembling and assembling tool provided by the present invention includes a support frame, a hydraulic cylinder, and a support pad. The hydraulic cylinder is arranged on the support frame, and the cylinder barrel of the hydraulic cylinder is fixedly connected to the support frame. When the hydraulic cylinder operates, the piston rod of the hydraulic cylinder can reciprocate relative to the cylinder barrel and the support frame. A connecting piece is arranged on the piston rod, and the connecting piece can be fixedly connected to the pin to be disassembled. The support pad has a penetrating space, and the penetrating space can allow the piston rod and the pin to pass through the support pad along the axial direction of the pin. A notch is arranged on the support pad, and the notch is communicated with the penetrating space. The notch can allow at least one of the piston rod and the pin to enter the penetrating space along the radial direction of the piston rod. When the support pad is sleeved outside the piston rod and the pin, the support pad can abut against the end of the cylinder barrel and the component connected to the pin. During use, control the hydraulic cylinder to extend, the piston rod extends out of the cylinder barrel, fixedly connect the connecting piece to the pin, and sleeve the support pad outside the piston rod. Then control the hydraulic cylinder to contract, the cylinder barrel gradually approaches the pin and the component connected to the pin until the support pad abuts against the end of the cylinder barrel and the component connected to the pin. Control the hydraulic cylinder to continue to contract, the cylinder barrel abuts against the component connected to the pin through the support pad, the cylinder barrel and the component connected to the pin are relatively fixed. When the piston rod displaces relative to the cylinder barrel, a force along the axial direction of the pin is generated on the pin to drive the pin to displace relative to the component connected to the pin, so as to gradually pull out the pin. At least two of the above support pads are provided, and each support pad can be selectively sleeved outside the piston rod and the pin. For a pin with a relatively large length, such as when the length of the pin is greater than the stroke of the hydraulic cylinder, the hydraulic cylinder can not pull out the entire pin in one telescopic movement. At this time, after the hydraulic cylinder completes one telescopic movement, control the hydraulic cylinder to extend again. The piston rod, the pin, and the component connected to the pin are relatively fixed, and the cylinder barrel gradually moves away from the component connected to the pin. Then add a support pad between the cylinder barrel and the component connected to the pin, and control the hydraulic cylinder to contract again to pull out the pin again. Cycle in this way until the entire pin is pulled out, then the disassembly operation of the pin is completed. With such a setting, by cooperating the hydraulic cylinder with multiple support pads, the disassembly of a pin with a relatively large length can be completed without selecting a hydraulic cylinder with a relatively large stroke. The stroke of the selected hydraulic cylinder can be less than the length dimension of the pin. A hydraulic cylinder with a smaller stroke can also complete the disassembly of a pin with a relatively large length dimension, which is beneficial to reducing the length dimension of the pin disassembling and assembling tool, can be applicable to the disassembly of pins in a narrow space, and is convenient to carry, solving the problem of the relatively large length dimension of the existing disassembly tool for disassembling pins with a relatively large length dimension.

[0033] In addition, after completing the disassembly and assembly operation of the pin, the support pad can be removed from the hydraulic cylinder, control the hydraulic cylinder to contract to retract the piston rod into the interior of the cylinder barrel, and store or transport the support pad separately from the hydraulic cylinder, which can reduce the requirements for storage space or transportation space and is convenient for storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 is a schematic structural diagram around the pin shaft required by the pin shaft disassembly and assembly tool provided by the present invention;

[0036] Figure 2 is a schematic structural diagram of the pin shaft disassembly and assembly tool provided by the present invention from the first perspective;

[0037] Figure 3 is a schematic structural diagram of the pin shaft disassembly and assembly tool provided by the present invention from the second perspective;

[0038] Figure 4 is an exploded view of a part of the pin shaft disassembly and assembly tool provided by the present invention;

[0039] Figure 5 is a schematic structural diagram when the connecting piece and the limiting piece provided by the present invention are installed in the piston rod;

[0040] Figure 6 is a schematic structural diagram of the pin shaft disassembly and assembly tool provided by the present invention;

[0041] Figure 7 is a schematic connection structure diagram of the connecting piece and the piston rod provided by the present invention;

[0042] Figure 8 is an exploded view of the support frame provided by the present invention;

[0043] Figure 9 is a schematic structural diagram of the second support provided by the present invention;

[0044] Figure 10 is a schematic structural diagram of a kind of support pad provided by the present invention;

[0045] Figure 11 is a schematic structural diagram of the bottom pad provided by the present invention;

[0046] Figure 12 is another schematic structural diagram of the support pad provided by the present invention;

[0047] Figure 13 is still another schematic structural diagram of the support pad provided by the present invention;

[0048] Figure 14It is a schematic structural diagram when the connecting piece of the pin shaft disassembly and assembly tool provided by the present invention is aligned with the pin shaft;

[0049] Figure 15 It is a schematic structural diagram when the connecting piece of the pin shaft disassembly and assembly tool provided by the present invention is connected to the pin shaft during the disassembly of the pin shaft;

[0050] Figure 16 It is a schematic structural diagram when the pin shaft disassembly and assembly tool provided by the present invention is completely connected to the pin shaft and the boom during the disassembly of the pin shaft;

[0051] Figure 17 It is a schematic diagram of the disassembly process of the pin shaft when a support cushion block is arranged between the cylinder barrel and the boom by the pin shaft disassembly and assembly tool provided by the present invention;

[0052] Figure 18 It is a schematic diagram of the adjustment process of the pin shaft disassembly and assembly tool before adding a support cushion block between the cylinder barrel and the boom provided by the present invention;

[0053] Figure 19 It is a schematic structural diagram when two support cushion blocks are arranged between the cylinder barrel and the boom by the pin shaft disassembly and assembly tool provided by the present invention;

[0054] Figure 20 It is a schematic diagram of the disassembly process of the pin shaft when two support cushion blocks are arranged between the cylinder barrel and the boom by the pin shaft disassembly and assembly tool provided by the present invention;

[0055] Figure 21 It is a schematic structural diagram when the pin shaft disassembly and assembly tool provided by the present invention completes the disassembly operation of the pin shaft;

[0056] Figure 22 It is an exploded view of the positioning rod provided by the present invention;

[0057] Figure 23 It is a schematic structural diagram when the handle acts on the cam provided by the present invention;

[0058] Figure 24 It is a schematic structural diagram of the pull rod provided by the present invention;

[0059] Figure 25 It is a schematic structural diagram when the pull rod is connected to the pin shaft provided by the present invention;

[0060] Figure 26 It is a schematic structural diagram when the pull rod extends into the pin hole during the installation of the pin shaft by the pin shaft disassembly and assembly tool provided by the present invention;

[0061] Figure 27 It is a schematic structural diagram when the connecting piece of the pin shaft disassembly and assembly tool is connected to the pull rod during the installation of the pin shaft provided by the present invention;

[0062] Figure 28 It is a schematic diagram of the installation process of the pin when two support pads are arranged between the cylinder barrel and the boom by the pin disassembly and assembly tool provided by the present invention;

[0063] Figure 29 It is a schematic structural diagram of the pin disassembly and assembly tool provided by the present invention when the installation operation of the pin is completed.

[0064] Reference numerals:

[0065] 1, support frame; 2, cylinder barrel; 3, piston rod; 4, connecting piece; 5, support pad; 6, threading space; 7, notch; 8, first installation hole; 9, limiting flange; 10, limiting piece; 11, pressing piece; 12, first torque hole; 13, second torque hole; 14, torque rod; 15, first bracket; 16, second bracket; 17, second installation hole; 18, positioning rod; 19, positioning groove; 20, positioning hole; 21, positioning rod body; 22, lengthening part; 23, handle; 24, cam; 25, first cushion body; 26, second cushion body; 27, pull rod; 28, boom; 29, pin; 30, bottom cushion; 31, torque groove; 32, third torque hole; 33, first connection hole; 34, connecting bolt; 35, connecting rod; 36, nut; 37, first vertical plate; 38, second vertical plate; 39, bottom plate; 40, third connection hole; 41, fixing plate; 42, reversing valve; 43, hydraulic oil pipe; 44, pipe clamp; 45, third installation hole; 46, mast turntable. Detailed implementation manners

[0066] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0067] The following will be combined with Figures 1 to 29 Describe the pin disassembly and assembly tool of the present invention.

[0068] As Figures 1 to 29 shown, the pin disassembly and assembly tool provided by the embodiment of the present invention includes a support frame 1, a hydraulic cylinder and a support pad 5.

[0069] Specifically, the hydraulic cylinder is arranged on the support frame 1, and the cylinder barrel 2 of the hydraulic cylinder is fixedly connected to the support frame 1. When the hydraulic cylinder operates, the piston rod 3 of the hydraulic cylinder can reciprocate relative to the cylinder barrel 2 and the support frame 1.

[0070] A connecting member 4 is provided on the piston rod 3, and the connecting member 4 can be fixedly connected to the pin shaft 29 to be disassembled. The support cushion block 5 has a through space 6, and the piston rod 3 and the pin shaft 29 can pass through the support cushion block 5 along their own axial directions. When the support cushion block 5 is sleeved outside the piston rod 3 or the pin shaft 29, when there are at least two support cushion blocks 5 between the cylinder barrel 2 and the pin shaft 29, the support cushion block 5 close to the member connected to the pin shaft 29 can abut against the member connected to the pin shaft 29, the support cushion block 5 close to the cylinder barrel 2 can abut against the cylinder barrel, and adjacent support cushion blocks 5 can abut against each other. When there is only one support cushion block 5 between the cylinder barrel 2 and the pin shaft 29, the support cushion block 5 can respectively abut against the end of the cylinder barrel 2 and the member connected to the pin shaft 29.

[0071] A notch 7 is provided on the support cushion block 5, and the notch 7 communicates with the through space 6. The notch 7 can allow at least one of the piston rod 3 and the pin shaft 29 to enter the through space 6 along the radial direction of the piston rod 3, which is convenient for the installation of the support cushion block 5 on the piston rod 3 or the pin shaft 29.

[0072] Taking a rotary drilling rig as an example, the rotary drilling rig has a boom 28 and a mast. The boom 28 includes two juxtaposed arm plates with a spacing therebetween. The mast turntable 46 extends into the space between the two arm plates, and the mast turntable 46 and the boom 28 are connected together by a pin shaft 29. When the rotary drilling rig is working, it is necessary to connect the mast turntable 46 and the boom 28 together. When transporting to a different site or for maintenance, it is necessary to disassemble the mast turntable 46 and the boom 28, and at this time, the pin shaft 29 between the mast turntable 46 and the boom 28 needs to be removed. In this scenario, when disassembling and assembling the pin shaft 29, the boom 28 serves as the member connected to the pin shaft 29 and is used to abut against the support cushion block 5. The following will be described taking this scenario as an example.

[0073] It should be noted that the working environment of the rotary drilling rig is relatively harsh. After a long time of work, the pin shaft 29 between the boom 28 and the mast turntable 46 will have certain surface damages, such as grooves, rust, etc., and even slight deformation. Such damages will increase the difficulty of disassembling the pin shaft 29.

[0074] During use, control the hydraulic cylinder to extend, the piston rod 3 extends out of the cylinder barrel 2, so that the connecting member 4 is fixedly connected to the pin shaft 29, and the support cushion block 5 is sleeved outside the piston rod 3. Then control the hydraulic cylinder to contract, and the cylinder barrel 2 gradually approaches the pin shaft 29 and the boom 28 until the support cushion block 5 abuts against the end of the cylinder barrel 2 and the boom 28. Control the hydraulic cylinder to continue to contract, the cylinder barrel 2 abuts against the boom 28 through the support cushion block 5, the cylinder barrel 2 and the boom 28 are relatively fixed, and when the piston rod 3 displaces relative to the cylinder barrel 2, a force along its axial direction is generated on the pin shaft 29 to drive the pin shaft 29 to displace relative to the boom, so as to gradually pull out the pin shaft 29.

[0075] At least two of the above-mentioned supporting pads 5 are provided, and each supporting pad 5 can be selectively sleeved outside the piston rod 3 or the pin shaft 29. For a pin shaft 29 with a relatively large length, such as when the length of the pin shaft 29 is greater than the stroke of the hydraulic cylinder, when the hydraulic cylinder expands and contracts once, the pin shaft 29 cannot be completely pulled out. At this time, after the hydraulic cylinder completes one expansion and contraction action, the hydraulic cylinder needs to be controlled to elongate again. The piston rod 3, the pin shaft 29, and the boom 28 are relatively fixed, and the cylinder barrel 2 gradually moves away from the boom 28. Then, a supporting pad 5 is added between the cylinder barrel 2 and the boom 28, and the hydraulic cylinder is controlled to contract again to pull the pin shaft 29 again. In this cycle, the pin shaft 29 is pulled out in the form of round-trip relay until the pin shaft 29 is completely pulled out, and then the disassembly operation of the pin shaft 29 is completed.

[0076] With such a setting, by cooperating the hydraulic cylinder with multiple supporting pads 5, the disassembly of a pin shaft 29 with a relatively large length can be completed without selecting a hydraulic cylinder with a relatively large stroke. The stroke of the selected hydraulic cylinder can be smaller than the length dimension of the pin shaft 29. A hydraulic cylinder with a smaller stroke can also complete the disassembly of a pin shaft 29 with a relatively large length dimension, which is beneficial to reducing the length dimension of the pin shaft disassembly tool, can be applicable to the disassembly of the pin shaft 29 in a narrow space, is convenient to carry, and solves the problem of the relatively large length dimension of the disassembly tool for disassembling a pin shaft with a relatively large length dimension in the prior art.

[0077] In addition, the pin shaft disassembly tool in this embodiment has the advantages of a compact structure and being convenient to carry. Taking an embodiment that can be accurately estimated as an example, the length, width, and height dimensions of the pin shaft disassembly tool are 368 millimeters, 255 millimeters, and 355 millimeters respectively, and the weight is only 25 kilograms. An adult man can easily lift it. When the pressure of the hydraulic system is 30 MPa, a shaft-pulling force of 260 kN can be provided.

[0078] It should be noted that when the pin shaft disassembly tool in this embodiment is used, different numbers of supporting pads 29 can be selected according to the length dimension of the pin shaft 29, which can not only realize the disassembly and assembly of a pin shaft with a relatively large length dimension, but also realize the disassembly and assembly of a pin shaft with a relatively small length dimension.

[0079] After completing the disassembly and assembly operation of the pin shaft 29, the supporting pad 5 can be removed from the hydraulic cylinder, the hydraulic cylinder is controlled to contract so that the piston rod 3 retracts into the interior of the cylinder barrel 2, and the supporting pad 5 and the hydraulic cylinder are stored or transported separately, which can reduce the requirements for storage space or transportation space and is convenient for storage and transportation.

[0080] It should be noted that the notch 7 provided on the above-mentioned support pad 5 enables the installation of the support pad 5 on the piston rod 3 or the pin shaft 29 by moving the support pad 5 radially close to the piston rod 3 or the pin shaft 29. There is no need to detach the connecting member 4 from the pin shaft 29, which is convenient for operation and effectively improves the disassembly efficiency of the pin shaft 29.

[0081] Before removing the pin shaft 29, it is necessary to sleeved the support pad 5 outside the piston rod 3. At this time, it is necessary to install the support pad 5 on the piston rod 3. Specifically, the support pad 5 can be displaced downward in the upward direction of the piston rod 3, with the notch 7 on the support pad 5 facing the piston rod 3. The distance between the support pad 5 and the piston rod 3 gradually decreases until the piston rod 3 enters the through space 6 of the support pad 5 through the notch 7.

[0082] After the pin shaft 29 is pulled out partially, the exposed part of the pin shaft 29 and the outside of the piston rod 3 can both be sleeved with the support pad 5. At this time, the support pad 5 can be installed on the piston rod 3 or on the exposed part of the pin shaft 29. Specifically, the support pad 5 can be displaced downward in the upward direction of the piston rod 3, with the notch 7 on the support pad 5 facing the piston rod 3, so that the piston rod 3 enters the through space 6 of the support pad 5 through the notch 7. Or the support pad 5 can be displaced downward in the upward direction of the exposed part of the pin shaft 29, with the notch 7 on the support pad 5 facing the exposed part of the pin shaft 29, so that the exposed part of the pin shaft 29 enters the through space 6 of the support pad 5 through the notch 7.

[0083] When adding the support pad 5 between the cylinder barrel 2 and the boom 28, the addition position of the support pad 5 can be determined according to the diameters of the pin shaft 29 and the piston rod 3. The support pad 5 can be added to the one with the smaller diameter among the pin shaft 29 and the piston rod 3, which can reduce the requirements for the size of the notch 7. With the size of the notch 7 reduced, it is beneficial to increase the contact area between the support pad 5 and the cylinder barrel 2 and the contact area between the support pad 5 and the boom 28. For example, when the diameter of the pin shaft 29 is greater than the diameter of the piston rod 3, the positions of the respective support pads 5 sleeved outside the pin shaft 29 and the piston rod 3 can be adjusted to form an installation space on the piston rod 3 for the support pad 5 to be added. When the diameter of the pin shaft 29 is smaller than the diameter of the piston rod 3, the positions of the respective support pads 5 sleeved outside the pin shaft 29 and the piston rod 3 can be adjusted to form an installation space on the exposed part of the pin shaft 29 for the support pad 5 to be added.

[0084] For the pin shaft 29 under heavy load conditions, its cross-sectional area is relatively large, even larger than the cross-sectional area of the piston rod 3. At this time, a relatively large through-hole space 6 on the support pad 5 is required to ensure that the pin shaft 29 can pass through the through-hole space 6 of the support pad 5. Since the cylinder barrel 2 abuts against the boom 28 through the support pad 5, to ensure that the cylinder barrel 2 abuts against the support pad 5 and there is sufficient contact area between the cylinder barrel 2 and the support pad 5, the pin shaft disassembly and assembly tool in this embodiment further includes a bottom pad 30. The bottom pad 30 also has a through-hole space 6, but the size of the through-hole space 6 on the bottom pad 30 is smaller than the size of the through-hole space 6 on the support pad 5. The through-hole space 6 on the bottom pad 30 only needs to allow the piston rod 3 to pass through.

[0085] The thickness of the bottom pad 30 is smaller than the thickness of the support pad 5, and the thickness of the support pad 5 is slightly smaller than the stroke of the hydraulic cylinder.

[0086] To facilitate the installation of the bottom pad 30 on the piston rod 3, a notch 7 can be provided on the bottom pad 30. The structure of the bottom pad 30 is similar to that of the support pad 5, but the size of the through-hole space 6 on the bottom pad 30 is smaller than the size of the through-hole space 6 on the support pad 5.

[0087] The support pad 5 and the bottom pad 30 have uniform thicknesses and are made of materials with relatively high compressive strength and low density, such as nylon, carbon fiber, etc. On the premise of meeting the usage requirements of the support pad 5 and the bottom pad 30, the mass of the support pad 5 and the bottom pad 30 can be reduced, which is beneficial to reducing the weight of the pin shaft disassembly and assembly tool and making it more convenient to carry and operate.

[0088] In some embodiments, the support pad 5 and the bottom pad 30 are set in a structural form with an adjustable notch 7 size. The following takes the structure of the support pad 5 as an example for elaboration.

[0089] The support pad 5 includes a first pad body 25 and a second pad body 26. Both the first pad body 25 and the second pad body 26 are arc-shaped. The first pad body 25 and the second pad body 26 are oppositely arranged and enclose a circular ring shape, referring to Figure 12 and Figure 13 . One end of the first pad body 25 is rotatably connected to one end of the second pad body 26, and the rotation axis is perpendicular to the plane where the circular ring shape is located.

[0090] When it is necessary to sleeved the support pad 5 on the piston rod 3, by relatively rotating the first pad body 25 and the second pad body 26, the other end of the first pad body 25 is separated from the other end of the second pad body 26, forming a notch 7, and making the through-hole space 6 in an open state. After the support pad 5 is placed on the piston rod 3 or after the support pad 5 is placed on the pin shaft 29, the first pad body 25 and the second pad body 26 rotate under their own gravity, so that the through-hole space 6 is closed.

[0091] The supporting cushion block 5 of this structure can provide more stable and uniform reaction forces during the disassembly and assembly of the pin shaft 29.

[0092] Specifically, one end of the first cushion body 25 can be hinged to one end of the second cushion body 26 by using a hinge shaft. Alternatively, one end of the first cushion body 25 can be connected to one end of the second cushion body 26 by using a webbing. The webbing is a flexible material that allows the first cushion body 25 and the second cushion body 26 to rotate relative to each other.

[0093] In this embodiment, the connecting member 4 is connected to the pin shaft 29 through a thread pair. An external thread is provided on the connecting member 4. At this time, a threaded hole needs to be machined on the end face of the pin shaft 29, and the threaded hole is adapted to the external thread on the connecting member 4.

[0094] In this embodiment, the connecting member 4 is rotatably connected to the piston rod 3, and the rotation axis of the connecting member 4 relative to the piston rod 3 coincides with the axis of the piston rod 3. When connecting the connecting member 4 to the pin shaft 29, the position of the entire pin shaft disassembly and assembly tool is adjusted so that the external thread of the connecting member 4 is aligned with the threaded hole on the pin shaft 29. Then, the connecting member 4 is rotated relative to the piston rod 3, and the threaded connection between the connecting member 4 and the pin shaft 29 can be achieved, avoiding the rotation of the entire pin shaft disassembly and assembly tool, facilitating operation, and reducing the labor intensity of the operator.

[0095] A limiting component is provided between the connecting member 4 and the piston rod 3 to limit the connecting member 4 from disengaging from the piston rod 3 in the direction away from the cylinder barrel 2. After the connecting member 4 is fixedly connected to the pin shaft 29, when the hydraulic cylinder contracts, the piston rod 3 can drive the connecting member 4 closer to the cylinder barrel 2.

[0096] In a specific embodiment, a first mounting hole 8 is provided on the piston rod 3, and the first end of the connecting member 4 can extend into the first mounting hole 8. A pipe can be directly selected to machine the piston rod 3.

[0097] The limiting component includes a limiting flange 9 and a limiting member 10. The limiting flange 9 is provided at the first end of the connecting member 4, and the limiting flange 9 is relatively fixed to the connecting member 4. After the first end of the connecting member 4 and the limiting flange 9 extend into the first mounting hole 8, the connecting member 4 and the limiting flange 9 can rotate in the first mounting hole 8 and can reciprocally slide in the first mounting hole 8.

[0098] The limiting member 10 is fixedly connected to the piston rod 3, and a through hole is provided on the limiting member 10. The second end of the connecting member 4 can pass through the through hole. The limiting flange 9 cannot pass through the through hole, and the limiting member 10 can abut against the limiting flange 9 to limit the first end of the connecting member 4 and the limiting flange 9 from disengaging from the first mounting hole 8. When the hydraulic cylinder contracts, the interaction between the limiting member 10 and the limiting flange 9 can cause the piston rod 3 to drive the connecting member 4 closer to the cylinder barrel 2.

[0099] The connecting member 4 is arranged in a structure that can slide relative to the piston rod 3. During transportation or storage, the connecting member 4 can be retracted into the interior of the piston rod 3. Refer to Figure 2 , which can further reduce the length dimension and occupied space of the pin disassembling and assembling tool.

[0100] A torque groove 31 can be arranged at one end of the limiting member 10 away from the piston rod 3. The wrench tool is inserted into the torque groove 31, and a torque is applied to the limiting member 10 by the wrench tool to make the limiting member 10 rotate relative to the piston rod 3. A third torque hole 32 can be arranged on the connecting member 4 at the same time, so that the wrench tool is inserted into the torque groove 31 of the limiting member 10 and the third torque hole 32 of the connecting member 4 at the same time. As Figure 5 shown, the connecting member 4 and the limiting member 10 rotate simultaneously.

[0101] In a further embodiment, the pin disassembling and assembling tool further includes a pressing member 11 and a torque rod 14.

[0102] The pressing member 11 is sleeved outside the connecting member 4 and is located on the side of the limiting member 10 away from the cylinder barrel 2. A first torque hole 12 is arranged on the pressing member 11, and a second torque hole 13 is arranged on the connecting member 4. The axial directions of the first torque hole 12 and the second torque hole 13 are both perpendicular to the axial direction of the piston rod 3. When the limiting flange 9 and the pressing member 11 both abut against the limiting member 10, the distance between the first torque hole 12 and the limiting member 10 is equal to the distance between the second torque hole 13 and the limiting member 10. By rotating the pressing member 11 around the axis of the piston rod 3 relative to the connecting member 4, the first torque hole 12 can be aligned with the second torque hole 13, so that the torque rod 14 can be inserted into the first torque hole 12 and the second torque hole 13 at the same time. After the torque rod 14 is inserted into the first torque hole 12 and the second torque hole 13, a torque can be applied to the connecting member 4 and the pressing member 11 through the torque rod 14, so that the connecting member 4 and the pressing member 11 rotate relative to the piston rod 3 at the same time, so that the connecting member 4 is threadedly connected to the pin 29, which is convenient for operation.

[0103] After the connecting member 4 is threadedly connected to the pin 29, the pressing member 11 is pressed between the pin 29 and the limiting member 10. Through the frictional force between the pressing member 11 and the end face of the pin 29, a certain pre-tightening force is increased, which can improve the reliability of the connection structure between the connecting member 4 and the pin 29 and can effectively prevent the accidental loosening of the connecting member 4 and the pin 29.

[0104] The above torque rod 14 can also be inserted into the third torque hole 32 and the torque groove 31, so that the torque rod 14 replaces the wrench tool to apply force to the limiting member 10.

[0105] A first connection hole 33 is provided at one end of the connecting member 4 away from the piston rod 3, and the torque rod 14 can extend into the first connection hole 33. When storing or transporting the pin disassembling and assembling tool, the torque rod 14 can extend into the first torque hole 12 of the pressing member 11 and the first connection hole 33 on the connecting member 4 at the same time, and the pressing member 11 and the torque rod 14 are installed on the piston rod 3 of the hydraulic cylinder at the same time, as Figure 2 shown. At this time, most of the connecting member 4 can be retracted into the piston rod 3. With such a setting, not only can the loss of the pressing member 11 and the torque rod 14 be avoided, but also the length dimension and occupied space of the pin disassembling and assembling tool can be reduced.

[0106] To facilitate the assembly connection between the hydraulic cylinder and the support frame 1, in this embodiment, the support frame 1 is set to be divided into two parts that can be disassembled.

[0107] The support frame 1 includes a first support 15, a second support 16 and a fastening member. The first support 15 and the second support 16 are arranged oppositely, and the cylinder barrel 2 is arranged between the first support 15 and the second support 16. Second mounting holes 17 are provided on the first support 15 and the second support 16, and both ends of the cylinder barrel 2 can extend into the second mounting hole 17 on the first support 15 and the second mounting hole 17 on the second support 16.

[0108] A limiting structure is provided between at least one of the first support 15 and the second support 16 and the cylinder barrel 2, which is used to limit the displacement of the cylinder barrel 2 relative to the first support 15 and the second support 16 along its own axis direction, so as to ensure the stability of the relative position between the cylinder barrel 2 and the support frame 1.

[0109] Specifically, the limiting structure includes step structures provided at both ends of the cylinder barrel 2. Through the interaction between the step structure at one end of the cylinder barrel 2 and the first support 15 and the interaction between the step structure at the other end of the cylinder barrel 2 and the second support 16, the displacement of the cylinder barrel 2 relative to the support frame 1 can be effectively limited.

[0110] After the end of the cylinder barrel 2 extends into the second mounting hole 17, the end face of the cylinder barrel 2 needs to protrude from the surface of the first support 15 and the second support 16 that are away from each other, so as to ensure that the support pad 5 can abut against the end face of the cylinder barrel 2. Avoiding the support pad 5 directly abutting against the support frame 1 and reducing the force on the support frame 1 can reduce the requirements for the stiffness and strength of the support frame 1.

[0111] After the cylinder barrel 2 is arranged between the first support 15 and the second support 16, the first support 15 and the second support 16 are fixedly connected together by using a fastening member.

[0112] The fastening member includes a connecting bolt 34, a connecting rod 35 and a nut 36.

[0113] The first support 15 and the second support 16 can be set as Figure 9In the shown structural form, both the first bracket 15 and the second bracket 16 include a first vertical plate 37, a second vertical plate 38 and a bottom plate 39. The first vertical plate 37 is used to connect with the end of the cylinder barrel 2. The bottom plate 39 is arranged between the first vertical plate 37 and the second vertical plate 38, and both the first vertical plate 37 and the second vertical plate 38 are fixedly connected with the bottom plate 39. A second connection hole is provided on the second vertical plate 38. After the first bracket 15 and the second bracket 16 are butted together, the second connection hole of the first bracket 15 is opposite to the second connection hole of the second bracket 16. The second vertical plate 38 of the first bracket 15 and the second vertical plate 38 of the second bracket 16 can be fixedly connected together by using a connecting bolt 34 and a nut 36.

[0114] Third connection holes 40 are provided on the first vertical plate 37 of the first bracket 15 and the first vertical plate 37 of the second bracket 16. The connecting rod 35 is located between the first vertical plate 37 of the first bracket 15 and the first vertical plate 37 of the second bracket 16, and both ends of the connecting rod 35 pass through the third connection holes 40 respectively and are connected with the nut 36. Step structures are formed at both ends of the connecting rod 35, and the step structures can abut against the first vertical plate 37. Through the interaction of the step structures on the connecting rod 35, the first vertical plate 37 and the nut 36, the stability of the support frame 1 can be ensured.

[0115] As Figure 9 shown, three third connection holes 40 are provided on the first vertical plate 37 of the first bracket 15 and the first vertical plate 37 of the second bracket 16. Correspondingly, the first bracket 15 and the second bracket 16 are connected together by using three connecting rods 35.

[0116] To lift the support pads 5 and the bottom pad 30 so that the through spaces of the respective support pads 5 and the through space of the bottom pad 30 are opposite and coaxially arranged to ensure that the pin 29 can pass through two adjacent support pads 5 smoothly or can pass through the support pad 5 and the bottom pad 30 smoothly when disassembling and assembling the pin 29, the pin disassembling and assembling tool in this embodiment further includes a positioning rod 18, and the positioning rod 18 is used to position the respective support pads 5 and the bottom pad 30.

[0117] The positioning rod 18 can penetrate through the first bracket 15 and the second bracket 16 along the axial direction of the piston rod 3 and can reciprocally slide relative to the first bracket 15 and the second bracket 16.

[0118] Specifically, third mounting holes 45 can be provided on the first vertical plate 37 of the first bracket 15 and the first vertical plate 37 of the second bracket 16. The positioning rod 18 extends into the third mounting holes 45 at the same time, and the third mounting holes 45 and the positioning rod 18 are in clearance fit.

[0119] The end of the positioning rod 18 is provided with a connecting portion for fixedly connecting with the boom 28. Connecting the positioning rod 18 and the boom 28 together can ensure the stability of the positioning rod 18.

[0120] In order to enable each support pad 5 and the bottom pad 30 to cooperate with the positioning rod 18, in this embodiment, positioning grooves 19 are provided on each support pad 5 and the bottom pad 30. The positioning grooves 19 communicate with the threading space 6, and the positioning grooves 19 can allow the positioning rod 18 to pass through.

[0121] When disassembling and assembling the pin shaft 29, if a large number of support pads 5 are required, to ensure the stability of the relative positions of the support pads 5 and prevent the support pads 5 and the bottom pad 30 from being displaced under pressure, positioning holes 20 can also be provided on each support pad 5 and the bottom pad 30. At this time, the number of positioning rods 18 needs to be increased so that there is a positioning rod 18 corresponding to the positioning groove 19 and the positioning hole 20 of the support pad, that is, at least two positioning rods 18 need to be provided.

[0122] The positions of the positioning holes 20 on each support pad 5 and the bottom pad 30 correspond to each other. The positioning rods 18 located in the positioning holes 20 and the positioning rods 18 located in the positioning grooves 19 are parallel to each other and are spaced apart.

[0123] Such as Figure 10 、 Figure 11 、 Figure 16 and Figure 18 , two positioning holes 20 are provided on each support pad 5 and the bottom pad 30, and the pin shaft disassembly and assembly tool has three positioning rods 18. One positioning rod 18 passes through the positioning groove 19, and the other two positioning rods 18 pass through the positioning holes 20. Through the mutual cooperation between the positioning rod 18 and the positioning groove 19 and the mutual cooperation between the positioning rod 18 and the positioning hole 20, the positioning of the support pad 5 and the bottom pad 30 can be realized, so that the centers of the threading spaces 6 of each support pad 5 and the threading space 6 of the bottom pad 30 correspond to the axis of the pin shaft 29 and the axis of the piston rod 3. The three positioning rods 18 fix each support pad 5 and the bottom pad 30 into a whole, which can prevent problems such as rotation, sliding, and overturning of the support pad 5 and the bottom pad 30 under pressure.

[0124] The positioning rod 18 can provide a supporting force for the support frame 1 and the hydraulic cylinder, and can reduce the bending moment generated by the gravity of the support frame 1 and the hydraulic cylinder on the piston rod 3 and the connecting member 4. Moreover, when the hydraulic cylinder expands and contracts, the above-mentioned positioning rod 18 can also guide the displacement of the cylinder barrel 2.

[0125] When it is necessary to add a support pad 5 between the cylinder barrel 2 and the boom 28, only the two positioning rods 18 passing through the positioning holes 20 can be detached from the boom 28, and the other positioning rod 18 can be kept connected to the boom 28.

[0126] For the convenience of description, it is now stipulated that the positioning rod 18 passing through the positioning groove 19 is the first positioning rod, and the positioning rod 18 passing through the positioning hole 20 is the second positioning rod. Before detaching the second positioning rod from the boom 28, it is necessary to slide each support pad 5 between the cylinder barrel 2 and the boom 28 along the axial direction of the piston rod 3 until it abuts against the cylinder barrel 2. When detaching the second positioning rod from the boom 28, the second positioning rod is gradually moved away from the boom 28. When the distance between the end of the second positioning rod close to the boom 28 and the boom 28 is greater than the thickness of one support pad 5, the support pad 5 is moved radially close to the pin shaft 29, and the first positioning rod and the pin shaft 29 respectively enter the positioning groove 19 and the through space 6. Then, the two second positioning rods are slid relative to the support frame 1 until they pass through the positioning holes 20 on the support pad 5, and the two second positioning rods are connected to the boom 28.

[0127] In this way, when adding the support pad 5 between the cylinder barrel 2 and the boom 28, the positioning rod 18 can still support the support frame 1 and the hydraulic cylinder.

[0128] The positioning rod 18 can be connected to the boom 28 through a thread pair. Specifically, the connecting portion includes an external thread provided at the end of the positioning rod 18, and a threaded hole is provided on the boom 28. By rotating the positioning rod 18, the positioning rod 18 can be connected to the boom 28.

[0129] Specifically, a threaded hole and two light holes can be provided on the boom 28, so that one positioning rod 18 is threadedly connected to the boom 28, and the other two positioning rods 18 are inserted into the boom 28.

[0130] It should be noted that the above description of the number of the positioning rods 18 and the number of the positioning holes 20 is only an exemplary description, and no specific limitation is imposed on the number of the positioning rods 18 and the number of the positioning holes 20. The number of the positioning rods 18 can be set to more than three, and can be specifically determined according to requirements.

[0131] It should be noted that the threaded hole and the light hole can be directly machined on the boom 28, or a fixing plate 41 with a threaded hole, a light hole and a pin hole can be machined, and the fixing plate 41 is fixed at the corresponding position of the boom 28 by welding.

[0132] When disassembling the pin shaft 29 with a smaller length, the required length of the positioning rod 18 is smaller. When disassembling the pin shaft 29 with a larger length, the required length of the positioning rod 18 is longer. It is necessary to make the length of the positioning rod 18 greater than the length of the pin shaft 29. In this embodiment, the positioning rod 18 is set as a segmented structure.

[0133] The positioning rod 18 includes a positioning rod body 21 and an extension part 22, as Figure 22As shown, the first end of the positioning rod body 21 has a bend to form a hand-held portion for convenient gripping. The second end of the positioning rod body 21 is provided with an external thread to be connected to the boom 28 through a thread pair.

[0134] The first end of the extension portion 22 is provided with a threaded hole for threaded connection with the second end of the positioning rod body 21. The second end of the extension portion 22 is provided with an external thread for connection with the boom 28.

[0135] The external thread on the extension portion 22 is the same as the external thread on the positioning rod body 21, and the threaded hole on the extension portion 22 is the same as the threaded hole on the boom 28, and the extension portion 22 can be selected as needed.

[0136] Multiple extension portions 22 can be provided. When disassembling the pin 29 with a relatively large length, multiple extension portions 22 can be connected in series and connected to the positioning rod body 21.

[0137] Setting the positioning rod 18 as a segmented structure can also reduce the occupied space during storage or transportation, facilitating storage and transportation. When disassembling and assembling the pin 29 with a relatively small length, it is not necessary to use the positioning rod 18 with a relatively large length. Using the positioning rod 18 with a relatively small length can also reduce the requirement for the working space.

[0138] In this embodiment, the pin disassembling and assembling tool further includes a handle 23. The handle 23 is arranged between the first bracket 15 and the second bracket 16, facilitating the lifting of the pin disassembling and assembling tool and enhancing the portability of the pin disassembling and assembling tool.

[0139] In a further embodiment, both ends of the handle 23 are respectively rotatably connected to the first bracket 15 and the second bracket 16, and the rotation axis is parallel to the axis of the piston rod 3. A cam 24 is arranged at the end of the handle 23, and the cam 24 is relatively fixed to the handle 23, as Figure 23 shown.

[0140] The handle 23 can rotate between a first position and a second position. When the handle 23 rotates to the first position, the cam 24 can press against the extension portion 22 to prevent the extension portion 22 from rotating and displacing relative to the support frame 1, so that the extension portion 22 and the support frame 1 remain relatively fixed. When the handle 23 rotates to the second position, the cam 24 is disengaged from the extension portion 22, and the extension portion 22 can rotate and displace relative to the support frame 1.

[0141] When it is necessary to disassemble or connect the positioning rod body 21 and the extension portion 22, the handle 23 can be rotated to the first position. By restricting the rotation and displacement of the extension portion 22 through the handle 23 and the cam 24, and applying force to the positioning rod body 21 manually, the positioning rod body 21 can be rotated relative to the extension portion 22, and the positioning rod body 21 and the extension portion 22 can be disassembled or connected together, facilitating the operation.

[0142] When it is necessary to rotate or displace the extension part 22 relative to the support frame 1, just rotate the handle 23 to the second position.

[0143] In this embodiment, the pin disassembling and assembling tool further includes a pull rod 27. One end of the pull rod 27 can be fixedly connected to the connecting piece 4, and the other end can be fixedly connected to the pin 29. Specifically, a threaded hole can be provided at one end of the pull rod 27 for mating with the external thread on the connecting piece 4, and an external thread is provided at the other end of the pull rod 27 for mating with the threaded hole on the pin 29.

[0144] The cross-sectional dimension of the pull rod 27 is smaller than that of the pin 29. When the cross-sections of both the pull rod 27 and the pin 29 are circular, the diameter of the pull rod 27 is smaller than that of the pin 29, so that the pull rod 27 can pass through the pin hole of the arm plate.

[0145] When installing the pin 29 using the pin disassembling and assembling tool provided in this embodiment, it is necessary to first thread-connect the pull rod 27 with the pin 29, arrange the support frame 1 and the hydraulic cylinder on one side of the boom 28, insert the pull rod 27 into the pin hole from the other side of the boom 28, and connect the pull rod 27 with the connecting piece 4. Then, after controlling the hydraulic cylinder to extend, place the support cushion block 5 and the bottom cushion block 30 between the cylinder barrel 2 and the arm plate, and then control the hydraulic cylinder to contract. The piston rod 3 applies a pulling force to the pin 29 through the pull rod 27, thereby installing the pin 29 into the pin hole of the boom 28.

[0146] For a pin 29 with a relatively large length, such as when the length of the pin 29 is greater than the stroke of the hydraulic cylinder, the hydraulic cylinder cannot fully insert the pin 29 into the pin hole in one telescopic movement. At this time, after the hydraulic cylinder completes one telescopic action, it is necessary to control the hydraulic cylinder to extend again. The piston rod 3, the pull rod 27, the pin 29, and the boom 28 are relatively fixed, and the cylinder barrel 2 gradually moves away from the boom 28. Then, add a support cushion block 5 between the cylinder barrel 2 and the boom 28, and control the hydraulic cylinder to contract again to pull the pin 29 again. Repeat this cycle until the pin 29 is fully pulled into the pin hole of the boom 28, then the installation operation of the pin 29 is completed.

[0147] When installing the pin 29, a chamfer can be provided at the end of the pin 29 to reduce the difficulty of the pin 29 entering the pin hole of the boom 28 and make the installation process smoother.

[0148] In some embodiments, when using the pin disassembling and assembling tool, the hydraulic cylinder can be directly connected to a hydraulic system with a commutation function.

[0149] In some other embodiments, the pin disassembling and assembling tool includes a reversing valve 42, which is arranged between the hydraulic cylinder and the bottom plate 39 of the support frame 1. The two working oil ports of the reversing valve 42 are respectively connected to the oil inlet and the oil return port of the hydraulic cylinder. Hydraulic oil pipes 43 are connected to the oil inlet and the oil return port of the reversing valve 42 and are used to connect to a hydraulic power source such as a hydraulic pump station. The hydraulic oil pipes 43 are connected to the hydraulic oil circuit of the hydraulic power source through quick connectors, which is convenient for assembly.

[0150] The above-mentioned reversing valve 42 can be a manual reversing valve, and manual operation is used to reverse the direction to control the telescopic movement of the hydraulic cylinder.

[0151] The pin disassembling and assembling tool in this embodiment can also include a separate hydraulic power source.

[0152] Considering that the hydraulic oil pipes 43 are generally connected to the reversing valve 42 through elbows, in order to avoid the problem of hydraulic oil leakage caused by the rotation of the hydraulic oil pipes 43 driving the elbows, the hydraulic oil pipes 43 can be wound around the outside of the cylinder barrel 2 of the hydraulic cylinder and fixed by pipe clamps 44, as shown in Figure 2 .

[0153] The structure of the pin disassembling and assembling tool in the embodiment of the present invention is compact, small and light, easy to carry and operate, and can improve the convenience of the pin 29 disassembling and assembling process. The pin disassembling and assembling tool has powerful performance and strong adaptability, and can meet the disassembly and assembly of heavy pins 29 in narrow spaces and the disassembly and assembly of pins 29 with different lengths. Moreover, by replacing the connecting piece 4 and the pull rod 27 with external threads of different diameters, the disassembly and assembly of pins 29 with threaded holes of different diameters can be realized, and the adaptability is strong.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pin disassembling and assembling tool, characterized in that, it comprises: a support frame; a hydraulic cylinder, arranged on the support frame, the cylinder barrel of the hydraulic cylinder is fixedly connected with the support frame, a connecting piece is arranged on the piston rod of the hydraulic cylinder, and the connecting piece is arranged to be fixedly connected with the pin; the connecting piece is arranged to be connected with the pin through a thread pair, the connecting piece is rotatably connected with the piston rod together, the rotation axis coincides with the axis of the piston rod, a limiting component is arranged between the connecting piece and the piston rod, and the limiting component is arranged to limit the connecting piece from separating from the piston rod along the direction away from the cylinder barrel; a first mounting hole for the first end of the connecting piece to extend into is arranged on the piston rod, the limiting component comprises a limiting flange and a limiting piece, the limiting flange is arranged at the first end of the connecting piece, the limiting flange is relatively fixed with the connecting piece, and the connecting piece and the limiting flange can rotate and reciprocate in the first mounting hole; the limiting piece is fixedly connected with the piston rod, a through hole for the second end of the connecting piece to pass through is arranged on the limiting piece, and the limiting piece is arranged to abut against the limiting flange; a support pad, having a through space for the piston rod and the pin to pass through along their own axis directions, a notch communicating with the through space is arranged on the support pad, and the notch is arranged to allow at least one of the piston rod and the pin to enter the through space along the radial direction of the piston rod; at least two support pads are provided, and each support pad is selectively sleeved outside the piston rod and the pin, the support pad can abut against the end of the cylinder barrel and the component connected with the pin, the support pad comprises a first pad body and a second pad body, both the first pad body and the second pad body are arc-shaped, the first pad body and the second pad body are arranged oppositely and enclose to form a circular ring shape, and one end of the first pad body is rotatably connected with one end of the second pad body, and the rotation axis is perpendicular to the plane where the circular ring shape is located; a pressing piece, sleeved outside the connecting piece and located on the side of the limiting piece away from the cylinder barrel, a first torque hole is arranged on the pressing piece, a second torque hole is arranged on the connecting piece, the axis directions of both the first torque hole and the second torque hole are perpendicular to the axis direction of the piston rod, and when the limiting flange and the pressing piece both abut against the limiting piece, the distance between the first torque hole and the limiting piece is equal to the distance between the second torque hole and the limiting piece; a torque rod, capable of extending into the first torque hole and the second torque hole simultaneously.

2. The pin disassembling and assembling tool according to claim 1, characterized in that, the support frame comprises: A first bracket and a second bracket which are oppositely arranged, the cylinder barrel is arranged between the first bracket and the second bracket, the first bracket and the second bracket are provided with second mounting holes for the two ends of the cylinder barrel to extend into, the end face of the cylinder barrel protrudes from the first bracket and the second bracket, and a limiting structure is arranged between at least one of the first bracket and the second bracket and the cylinder barrel, and the limiting structure is configured to limit the displacement of the cylinder barrel relative to the first bracket and the second bracket along the axis direction of the cylinder barrel itself; A fastener for fixedly connecting the first bracket and the second bracket together.

3. The pin disassembling and assembling tool according to claim 2, characterized in that, further comprising: A positioning rod, the positioning rod penetrates through the first bracket and the second bracket along the axis direction of the piston rod, and the positioning rod can reciprocally slide relative to the first bracket and the second bracket. A connecting portion for fixedly connecting with the component connected to the pin is arranged at the end of the positioning rod. At least a positioning groove for the positioning rod to pass through is arranged on the support cushion block, and the positioning groove is communicated with the penetrating space.

4. The pin disassembling and assembling tool according to claim 3, characterized in that, the positioning rod is arranged to be connected with the component connected to the pin through a thread pair, and the positioning rod comprises: A positioning rod body, with a hand-held portion arranged at the first end and the second end arranged to be connected with the component connected to the pin through a thread pair; An extension portion, the first end of which can be threadedly connected with the second end of the positioning rod body, and the second end of the extension portion is arranged to be connected with the component connected to the pin through a thread pair.

5. The pin disassembling and assembling tool according to claim 4, characterized in that, further comprising: A handle, arranged between the first bracket and the second bracket, the two ends of the handle are respectively rotatably connected with the first bracket and the second bracket, the rotation axis is parallel to the axis of the piston rod, a cam is arranged on the handle, the cam is relatively fixed with the handle, the handle can rotate between a first position and a second position. In the first position, the cam presses against the extension portion, and in the second position, the cam is disengaged from contact with the extension portion.

6. The pin disassembling and assembling tool according to claim 1, characterized in that, further comprising: A pull rod, one end of the pull rod is arranged to be fixedly connected with the connecting piece, and the other end of the pull rod is arranged to be fixedly connected with the pin, and the cross-sectional dimension of the pull rod is smaller than the cross-sectional dimension of the pin.

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