Hydraulic cylinder dismounting device

Abstract

The invention relates to the technical field of hydraulic cylinder dismounting and mounting, in particular to a hydraulic cylinder dismounting and mounting device which comprises a dismounting and mounting assembly, the dismounting and mounting assembly comprises a clamp arm and a handle, one end of the handle is connected with the clamp arm, and at least two through holes penetrating through the clamp arm in the thickness direction of the clamp arm are formed in the clamp arm; the at least two through holes are symmetrically arranged along the axis of the handle, the through holes are used for being matched with positioning holes in a rear end cover of the hydraulic cylinder, at least two clamping pieces extending in the direction away from the clamp arm are arranged on the end face of the clamp arm in the thickness direction of the clamp arm, and the at least two clamping pieces are arranged in the circumferential direction of the clamp arm at intervals. According to the hydraulic cylinder dismounting and mounting device provided by the embodiment of the invention, the dismounting and mounting efficiency of the hydraulic cylinder can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinder disassembly and assembly, and in particular to a hydraulic cylinder disassembly and assembly device. Background Art

[0002] As a commonly used lifting equipment in hydropower stations, the gantry crane needs to use the hydraulic beam grabbing and pinning device of the gantry crane to lift the gate into the inspection gate slot when inspecting the flood discharge gate. The hydraulic beam grabbing and pinning device uses the hydraulic pump station to transport hydraulic oil into the hydraulic cylinder, and changes the direction of the inlet and outlet oil circuits through the electromagnetic reversing valve to make the hydraulic cylinder push the pin shaft forward or backward, thereby realizing the pinning and disengaging of the pin shaft. However, with the operation of the hydraulic beam grabbing and pinning device, the hydraulic cylinder has oil leakage, and the seals at the oil leakage position need to be replaced in time.

[0003] However, when disassembling and assembling the pressure relief cylinder, the front cover and the rear cover of the hydraulic cylinder are fixed in different ways, which requires a variety of special tools to achieve disassembly and assembly, and the disassembly and assembly efficiency is low. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a hydraulic cylinder disassembly and assembly device, which can improve the disassembly and assembly efficiency of the hydraulic cylinder.

[0005] The hydraulic cylinder disassembly and assembly device of the embodiment of the present invention includes a disassembly and assembly component, which includes a caliper arm and a handle, one end of the handle is connected to the caliper arm, the caliper arm is provided with at least two through holes penetrating the caliper arm along the thickness direction thereof, at least two of the through holes are symmetrically arranged along the axis of the handle, the through holes are used to cooperate with the positioning holes on the rear end cover of the hydraulic cylinder, the caliper arm is provided with at least two clips extending in a direction away from the caliper arm on its end face in the thickness direction, at least two of the clips are arranged at intervals in the circumferential direction of the caliper arm, and the clips are used to cooperate with the clip grooves of the round nut on the hydraulic cylinder.

[0006] The hydraulic cylinder disassembly and assembly device of the embodiment of the present invention is achieved by arranging a clamping piece on the end face of the clamp arm in the thickness direction, and by clamping the clamping piece into the clamping groove on the outer peripheral surface of the round nut along the front-to-back direction, so as to realize the connection between the clamping piece and the round nut, and the round nut can be installed and disassembled by turning the handle. At the same time, by arranging a through hole that penetrates the clamp arm along the thickness direction on the clamp arm, it is convenient to connect the clamp arm with the rear end cover, and the rear end cover can be installed and disassembled by turning the handle. In other words, the hydraulic cylinder disassembly and assembly tool of this embodiment can be used to disassemble and assemble the round nut and the rear end cover, and it can be used for multiple purposes, avoiding the tedious process of constantly searching for tools and replacing tools during the disassembly and assembly of the hydraulic cylinder, and at the same time it can adapt to the disassembly and assembly of the round nut and the rear end cover, thereby improving the disassembly and assembly efficiency of the hydraulic cylinder.

[0007] In some embodiments, the pliers arm includes a first pliers arm and a second pliers arm, one end of the first pliers arm is connected to one end of the second pliers arm, one end of the handle is connected to the outer peripheral surface of one end of the second pliers arm, and at least one of the two through holes is located in the first pliers arm, and the other through hole is located in the second pliers arm.

[0008] In some embodiments, on a projection plane orthogonal to a thickness direction of the pliers arm, the projection of the pliers arm is a fan ring, and the radii of the first pliers arm and the second pliers arm are the same.

[0009] In some embodiments, at least two of the clips include a first clip and a second clip. The first clip is disposed on the first clamp arm and is spaced apart from the through hole on the first clamp arm in the circumferential direction of the first clamp arm. The second clip is disposed on the second clamp arm and is spaced apart from the through hole on the second clamp arm in the circumferential direction of the second clamp arm.

[0010] In some embodiments, there are two first clips, the two first clips are arranged at intervals in the circumferential direction of the first clamp arm, and the through hole on the first clamp arm is located between the two first clips; and / or, there are two second clips, the two second clips are arranged at intervals in the circumferential direction of the second clamp arm, and the through hole on the second clamp arm is located between the two second clips.

[0011] In some embodiments, the hydraulic cylinder disassembly and assembly device also includes a limiting assembly, which includes a limiting portion and a limiting member. The limiting portion is arranged at one end of the second clamp arm, and the limiting portion is adjacent to the first clamp arm compared to the handle. One end of the first clamp arm passes through the limiting portion and is rotatably connected to one end of the second clamp arm. One end of the limiting member extends into the limiting portion, and the extension length is adjustable to limit the first clamp arm.

[0012] In some embodiments, the hydraulic cylinder disassembly and assembly device also includes a pin shaft, a first connecting hole is provided at one end of the first clamp arm, a second connecting hole is provided at one end of the second clamp arm, and the pin shaft is inserted into the first connecting hole and the second connecting hole.

[0013] In some embodiments, there are multiple through holes on the first pliers arm and the second pliers arm, and the multiple through holes are arranged at intervals in the circumferential direction of the pliers arms.

[0014] In some embodiments, the handle is provided with a positioning bolt hole which penetrates the handle along the thickness direction thereof, and the positioning bolt hole is used for installing a positioning bolt which cooperates with the positioning hole on the rear end cover.

[0015] In some embodiments, threads are provided on the inner wall surface of the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a hydraulic cylinder disassembly and assembly device according to an embodiment of the present invention, and the positioning bolt is located in the through hole.

[0017] Figure 2 It is a schematic diagram of a hydraulic cylinder disassembly and assembly device according to an embodiment of the present invention, and the positioning bolt is located in the positioning bolt hole.

[0018] Figure 3 It is a three-dimensional diagram of a hydraulic cylinder disassembly and assembly device according to an embodiment of the present invention.

[0019] Reference numerals:

[0020] Disassembly assembly 1, clamp arm 11, through hole 111, clamping member 112, first clamping member 1121, second clamping member 1122,

[0021] The first clamp arm 113, the second clamp arm 114,

[0022] Handle 12, positioning bolt hole 121,

[0023] Limiting assembly 2, limiting portion 21, limiting member 22,

[0024] Pin 3, positioning bolt 4. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] The hydraulic cylinder disassembly and assembly device of the embodiment of the present invention includes a disassembly and assembly component 1, which includes a clamp arm 11 and a handle 12. One end of the handle 12 is connected to the clamp arm 11, and the clamp arm 11 is provided with at least two through holes 111 that penetrate the clamp arm 11 along the thickness direction thereof. The at least two through holes 111 are symmetrically arranged along the axis of the handle 12, and the through holes 111 are used to cooperate with the positioning holes on the rear end cover of the hydraulic cylinder. The clamp arm 11 is provided with at least two clips 112 extending in a direction away from the clamp arm 11 on the end face in the thickness direction thereof, and the at least two clips 112 are arranged at intervals in the circumferential direction of the clamp arm 11, and the clips 112 are used to cooperate with the slots of the round nuts on the hydraulic cylinder.

[0027] It should be noted that the round nut is threadedly connected to the front end cover of the hydraulic cylinder to prevent the front end cover from falling off the cylinder barrel of the hydraulic cylinder. The inner circumference of the round nut is provided with threads, and the outer circumference of the round nut is provided with a slot that penetrates the round nut along its radial direction. When installing and removing the round nut, it is necessary to use a special disassembly tool for the round nut to install and remove the round nut. The rear end cover of the hydraulic cylinder is provided with a positioning hole, and the outer circumference of the rear end cover is provided with threads. The cylinder seat of the hydraulic cylinder is provided with an internal thread that cooperates with the rear end cover. The rear end cover is installed by threaded connection between the rear end cover and the cylinder seat. When installing and removing the rear end cover, it is necessary to use a special disassembly tool for the end cover to install and remove the rear end cover. Optionally, the positioning hole is a round hole.

[0028] Specifically, Figure 1-Figure 3 As shown, the lower end of the clamp arm 11 is connected to the handle 12, and at least two through holes 111 are respectively provided on the left and right sides of the clamp arm 11 and arranged symmetrically. The through holes 111 on the clamp arm 11 are used to cooperate with the positioning holes on the rear end cover of the hydraulic cylinder. The symmetrical arrangement of at least two through holes 111 in the left and right directions facilitates the alignment of the two positioning holes on the rear end cover when installing and removing the rear end cover, so that the force on the rear end cover is more balanced.

[0029] The clamp arm 11 is provided with a clamping member 112 on one end surface in the thickness direction thereof, that is, the clamping member 112 is provided at the front end of the clamp arm 11, the clamping member 112 extends forward and protrudes from the clamp arm 11, or the clamping member 112 is provided at the rear end of the clamp arm 11, the clamping member 112 extends backward and protrudes from the clamp arm 11, and the clamping member 112 is used to be clamped into the clamping groove on the round nut. The provision of at least two clamping members 112 avoids the phenomenon of slipping easily occurring when only one clamping member 112 is provided, thereby improving the installation and removal efficiency of the round nut.

[0030] For the convenience of description, the present embodiment is described by taking the example that the clamping member 112 is arranged at the front end of the clamp arm 11. When installing and removing the rear end cover, the rear end of the clamp arm 11 is placed on the end surface of the rear end cover and the through hole 111 on the clamp arm 11 is aligned with the positioning hole on the rear end cover. The positioning bolt 4 passes through the through hole 111 and the positioning hole in sequence to realize the connection between the clamp arm 11 and the rear end cover. The handle 12 is turned to rotate the rear end cover relative to the cylinder seat to realize the installation and removal of the rear end cover.

[0031] When installing and removing the round nut, the front end of the clamp arm 11 is directed toward the round nut. Since the clamping piece 112 extends forward, that is, the clamping piece 112 protrudes forward from the clamp arm 11, the clamp arm 11 is connected to the round nut by inserting the clamping piece 112 on the clamp arm 11 into the groove on the outer peripheral surface of the round nut. The handle 12 is turned to rotate the round nut to achieve installation and removal of the round nut.

[0032] The hydraulic cylinder disassembly and assembly device of the embodiment of the present invention is provided with a clamping piece 112 on the end face of the clamp arm 11 in the thickness direction, and the clamping piece 112 is inserted into the clamping groove on the outer peripheral surface of the round nut along the front-to-back direction to achieve the connection between the clamping piece 112 and the round nut, and the round nut is installed and removed by rotating the handle 12. At the same time, a through hole 111 is provided on the clamp arm 11 that penetrates the clamp arm 11 along the thickness direction, so that the clamp arm 11 is conveniently connected to the rear end cover, and the rear end cover is installed and removed by rotating the handle 12. In other words, the hydraulic cylinder disassembly and assembly tool of this embodiment can be used to disassemble and assemble the round nut and the rear end cover, and it can be used for multiple purposes, avoiding the tedious process of constantly searching for tools and replacing tools during the disassembly and assembly of the hydraulic cylinder, and at the same time it is suitable for the disassembly and assembly of the round nut and the rear end cover, thereby improving the disassembly and assembly efficiency of the hydraulic cylinder.

[0033] Compared with the method in the related art that requires the round nut to be inserted into the slot from the radial direction, the hydraulic cylinder disassembly and assembly device in the embodiment of the present invention provides a clamping piece 112 on the end face of the clamp arm 11 in the thickness direction. Since the clamping piece 112 extends along its thickness direction, the thickness direction of the clamp arm 11 is consistent with the axial direction of the round nut, so that the clamping piece 112 can be directly inserted into the slot of the round nut along the axial direction of the round nut, thereby improving the connection efficiency between the clamping piece 112 and the round nut, facilitating the connection between the clamping piece 112 and the round nut, and thereby improving the disassembly and assembly efficiency of the round nut.

[0034] In some embodiments, the pliers arm 11 includes a first pliers arm 113 and a second pliers arm 114, one end of the first pliers arm 113 is connected to one end of the second pliers arm 114, one end of the handle 12 is connected to the outer peripheral surface of one end of the second pliers arm 114, and one of the at least two through holes 111 is located in the first pliers arm 113, and the other through hole 111 is located in the second pliers arm 114.

[0035] Specifically, Figure 1-Figure 3 As shown, the right end of the first clamp arm 113 is connected to the left end of the second clamp arm 114, the upper end of the handle 12 is connected to the lower end of the second clamp arm 114, at least one through hole 111 is provided on the first clamp arm 113, and at least one through hole 111 is provided on the second clamp arm 114. The through holes 111 on the first clamp arm 113 and the through holes 111 on the second clamp arm 114 are symmetrically arranged.

[0036] It can be understood that the positioning holes on the rear end cover are arranged at intervals along its circumference, and multiple positioning holes are symmetrically arranged along the radial direction of the rear end cover. Through the symmetrical arrangement of the through holes 111 on the first clamp arm 113 and the through holes 111 on the second clamp arm 114, the two symmetrical positioning holes on the rear end cover can be matched at the same time, so as to provide a stable torque balance for the rear end cover and improve the disassembly and assembly stability of the rear end cover.

[0037] Optionally, the second clamp arm 114 is integrally formed with the handle 12 to improve the strength and stability of the clamp arm 11 .

[0038] In some embodiments, Figure 1-Figure 2 As shown, on the projection plane orthogonal to the thickness direction of the clamp arm 11, the projection of the clamp arm 11 is a fan ring, and the radius of the first clamp arm 113 and the second clamp arm 114 are the same. The setting of the fan ring allows the clamp arm 11 to adapt to the shape of the round nut and the rear end cover, thereby improving the convenience of connecting the clamp arm 11 with the round nut and the rear end cover.

[0039] Furthermore, the radius of the first clamp arm 113 and the second clamp arm 114 is the same. When the clamp arm 11 is disassembling and assembling the round nut, by aligning the center of the first clamp arm 113 and the second clamp arm 114 with the axis of the round nut, it is ensured that multiple clamping parts 112 can be inserted into the clamping slot at the same time, thereby improving the connection stability and further improving the installation efficiency.

[0040] In some embodiments, at least two clips 112 include a first clip 1121 and a second clip 1122. The first clip 1121 is disposed on the first clamp arm 113 and is spaced apart from the through hole 111 on the first clamp arm 113 in the circumferential direction of the first clamp arm 113. The second clip 1122 is disposed on the second clamp arm 114 and is spaced apart from the through hole 111 on the second clamp arm 114 in the circumferential direction of the second clamp arm 114.

[0041] Specifically, Figure 1-Figure 3 As shown, the first clamping member 1121 is arranged on the first clamp arm 113, and the second clamping member 1122 is arranged on the second clamp arm 114. By cooperating with one of the slots on the round nut through the first clamping member 1121 and the second clamping member 1122 and the other slot on the round nut, it is convenient to provide a stable torque balance for the round nut and improve the disassembly and assembly stability of the round nut.

[0042] In some embodiments, there are two first clamping members 1121 , and the two first clamping members 1121 are spaced apart in the circumferential direction of the first clamp arm 113 , and the through hole 111 on the first clamp arm 113 is located between the two first clamping members 1121 .

[0043] Specifically, Figure 1-Figure 3 As shown, since the first clamp arm 113 is arc-shaped, the two first clips 1121 are spaced apart in the up and down directions, and the through hole 111 on the first clamp arm 113 is arranged between the upper first clip 1121 and the lower first clip 1121. By arranging two first clips 1121 on the first clamp arm 113, it is convenient to cooperate with the two slots on the round nut, thereby improving the connection stability.

[0044] In some embodiments, there are two second clamping members 1122 , which are spaced apart in the circumferential direction of the second clamp arm 114 , and the through hole 111 on the second clamp arm 114 is located between the two second clamping members 1122 .

[0045] Specifically, Figure 1-Figure 3 As shown, the two second clips 1122 are spaced apart in the up and down directions, and the through hole 111 on the second clamp arm 114 is arranged between the upper second clip 1122 and the lower second clip 1122. By arranging two second clips 1122 on the second clamp arm 114, it is convenient to cooperate with the two slots on the round nut to improve the connection stability.

[0046] It can be understood that four clip grooves are generally set on the outer circumferential surface of the round nut. In this embodiment, two first clip parts 1121 are set on the first clamp arm 113, and two second clip parts 1122 are set on the second clamp arm 114. The two first clip parts 1121 and the two second clip parts 1122 are respectively inserted into the four clip grooves of the round nut, thereby improving the connection stability between the clamp arm 11 and the round nut, and the four clip parts 112 apply force to the round nut at the same time, which facilitates the smooth disassembly and assembly of the round nut.

[0047] In some embodiments, the hydraulic cylinder disassembly and assembly device also includes a limit assembly 2, the limit assembly 2 includes a limit portion 21 and a limit member 22, the limit portion 21 is arranged at one end of the second clamp arm 114, and the limit portion 21 is adjacent to the first clamp arm 113 compared to the handle 12, one end of the first clamp arm 113 passes through the limit portion 21 and is rotatably connected to one end of the second clamp arm 114, one end of the limit member 22 extends into the limit portion 21, and the extension length is adjustable to limit the first clamp arm 113.

[0048] Specifically, Figure 1-Figure 2 As shown, the limiting portion 21 is a limiting cylinder, which is arranged at the lower end of the left side of the second clamp arm 114. The limiting portion 21 is arranged obliquely and is located on the left side of the handle 12. The right end of the first clamp arm 113 passes through the limiting portion 21 and is rotatably connected to the left end of the second clamp arm 114. The upper end of the limiting member 22 extends into the limiting portion 21 and can abut against the first clamp arm 113 to prevent the first clamp arm 113 from swinging. The first clamp arm 113 is limited by adjusting the length of the upper end of the limiting member 22 extending into the limiting portion 21.

[0049] Optionally, the limiting member 22 is a locking screw, and the limiting portion 21 and the second clamp arm 114 are integrally formed.

[0050] In some embodiments, the hydraulic cylinder disassembly and assembly device further includes a pin shaft 3, a first connecting hole is provided at one end of the first clamp arm 113, a second connecting hole is provided at one end of the second clamp arm 114, and the pin shaft 3 is inserted into the first connecting hole and the second connecting hole.

[0051] Specifically, Figure 1-Figure 3As shown, the right end of the first clamp arm 113 and the left end of the second clamp arm 114 are connected by a pin 3, and the pin 3 extends in the front-to-back direction. Through the rotational connection of the first clamp arm 113 and the second clamp arm 114, the first clamp arm 113 and the second clamp arm 114 can adapt to rear end covers of different sizes, thereby improving the adaptability of the disassembly and assembly device.

[0052] In some embodiments, Figure 1-Figure 3 As shown, there are multiple through holes 111 on the first clamp arm 113 and the second clamp arm 114, and the multiple through holes 111 are arranged at intervals in the circumferential direction of the clamp arm 11. The arrangement of multiple through holes 111 can adapt to the disassembly and assembly of rear end covers of different diameters by changing the through holes 111 that cooperate with the rear end cover.

[0053] Optionally, there are three through holes 111 on the first clamp arm 113 and three through holes 111 on the second clamp arm 114 , and the three through holes 111 on the first clamp arm 113 and the three through holes 111 on the second clamp arm 114 are symmetrically arranged.

[0054] In some embodiments, the handle 12 is provided with a positioning bolt hole 121 that penetrates the handle 12 along the thickness direction thereof, and the positioning bolt hole 121 is used to install a positioning bolt 4 that cooperates with the positioning hole on the rear end cover.

[0055] Specifically, Figure 1-Figure 3 As shown, a positioning bolt hole 121 is provided at the lower end of the handle 12. When disassembling the rear end cover, the positioning bolt 4 is first removed from the positioning bolt hole 121, and then the positioning bolt 4 is sequentially passed through the through hole 111 on the clamp arm 11 and the positioning hole on the rear end cover to achieve the connection between the clamp arm 11 and the rear end cover. In this embodiment, by setting the installation position of the positioning bolt 4 on the handle 12, it is convenient to fix the positioning bolt 4 on the handle 12, avoiding the tediousness of finding the positioning bolt 4 when it is needed, and improving the disassembly and assembly efficiency.

[0056] In some embodiments, threads are provided on the inner wall surface of the through hole 111. By providing threads matching with the positioning bolt 4 on the inner wall surface of the through hole 111, the connection between the positioning bolt 4 and the clamp arm 11 is facilitated, thereby improving the disassembly and assembly efficiency.

[0057] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] It is to be understood that the above embodiments are exemplary and are not to be construed as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydraulic cylinder disassembly and assembly device, characterized in that: It includes a disassembly and assembly component, which includes a caliper arm and a handle, one end of the handle is connected to the caliper arm, the caliper arm is provided with at least two through holes penetrating the caliper arm along the thickness direction, at least two of the through holes are symmetrically arranged along the axis of the handle, the through holes are used to cooperate with the positioning holes on the rear end cover of the hydraulic cylinder, the caliper arm is provided with at least two clips extending in the direction away from the caliper arm on its end face in the thickness direction, at least two of the clips are arranged at intervals in the circumferential direction of the caliper arm, and the clips are used to cooperate with the slots of the round nut on the hydraulic cylinder.

2. The hydraulic cylinder disassembly and assembly device according to claim 1, characterized in that: The pliers arm comprises a first pliers arm and a second pliers arm, one end of the first pliers arm is connected to one end of the second pliers arm, one end of the handle is connected to the outer peripheral surface of one end of the second pliers arm, and at least one of the two through holes is located in the first pliers arm, and the other through hole is located in the second pliers arm.

3. The hydraulic cylinder disassembly and assembly device according to claim 2, characterized in that: On a projection plane orthogonal to the thickness direction of the caliper arm, the projection of the caliper arm is a fan ring, and the radius of the first caliper arm and the second caliper arm are the same.

4. The hydraulic cylinder disassembly and assembly device according to claim 2, characterized in that: At least two of the clamping parts include a first clamping part and a second clamping part. The first clamping part is arranged on the first clamp arm and is spaced apart from the through hole on the first clamp arm in the circumferential direction of the first clamp arm. The second clamping part is arranged on the second clamp arm and is spaced apart from the through hole on the second clamp arm in the circumferential direction of the second clamp arm.

5. The hydraulic cylinder disassembly and assembly device according to claim 4, characterized in that: There are two first clamping members, the two first clamping members are arranged at intervals in the circumferential direction of the first clamp arm, and the through hole on the first clamp arm is located between the two first clamping members; and / or, There are two second clamping parts, which are arranged at intervals in the circumferential direction of the second clamp arm, and the through hole on the second clamp arm is located between the two second clamping parts.

6. The hydraulic cylinder disassembly and assembly device according to claim 3, characterized in that: It also includes a limiting assembly, which includes a limiting portion and a limiting member. The limiting portion is arranged at one end of the second clamp arm, and the limiting portion is closer to the first clamp arm than the handle. One end of the first clamp arm passes through the limiting portion and is rotatably connected to one end of the second clamp arm. One end of the limiting member extends into the limiting portion, and the extension length is adjustable to limit the first clamp arm.

7. The hydraulic cylinder disassembly and assembly device according to claim 6, characterized in that: It also includes a pin shaft, a first connecting hole is provided at one end of the first clamp arm, a second connecting hole is provided at one end of the second clamp arm, and the pin shaft passes through the first connecting hole and the second connecting hole.

8. The hydraulic cylinder disassembly and assembly device according to claim 6, characterized in that: There are multiple through holes on the first caliper arm and the second caliper arm, and the multiple through holes are arranged at intervals in the circumferential direction of the caliper arm.

9. The hydraulic cylinder disassembly and assembly device according to claim 1, characterized in that: The handle is provided with a positioning bolt hole which penetrates the handle along the thickness direction thereof, and the positioning bolt hole is used for installing a positioning bolt which matches with the positioning hole on the rear end cover.

10. The hydraulic cylinder disassembly and assembly device according to claim 9, characterized in that: The inner wall surface of the through hole is provided with threads.

Images