Supporting sheet dismounting jig for oil damper

Abstract

The application discloses a supporting sheet dismounting jig for an oil pressure damper and relates to the technical field of jigs.The supporting sheet dismounting jig comprises a pressing and dismounting base, the pressing and dismounting base is provided with a fixing groove, the pressing and dismounting base is placed with a piston rod in the fixing groove in the up-down direction, a supporting sheet is arranged on the outer side wall of the piston rod, a pressing rod connected with the output end of a hydraulic cylinder is arranged above the pressing and dismounting base, and a containing groove for the piston rod to enter is arranged on the end of the pressing rod close to the supporting sheet; and the end of the pressing rod close to the supporting sheet can abut against the supporting sheet to dismount the supporting sheet. The piston rod is positioned by the fixing groove, the pressing rod connected with the output end of the hydraulic cylinder is used to replace artificial knocking, the end of the pressing rod close to the supporting sheet can directly abut against the supporting sheet, the supporting sheet is dismounted by means of the continuous and stable pressure provided by the hydraulic cylinder, the cooperation force between the supporting sheet and the piston rod is more efficiently overcome, the operation times are greatly reduced, and the dismounting efficiency is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of jig technology, and in particular to a jig for disassembling support plates for hydraulic dampers. Background Technology

[0002] Hydraulic vibration dampers, as devices that utilize the damping effect of hydraulic fluid to achieve vibration reduction, are widely used in the automotive, rail transportation, and construction machinery industries. Their core working principle involves the reciprocating motion of a piston rod within a cylinder, causing hydraulic fluid to flow through specific channels and generate damping force, thereby effectively attenuating vibrations and impacts and ensuring the stability and safety of equipment operation. With the increasing demands for precision and reliability in industrial applications, the performance optimization and ease of maintenance of hydraulic vibration dampers have become key industry focuses, with the installation and disassembly processes of involved components being particularly crucial.

[0003] In existing technologies, when repairing or maintaining a hydraulic vibration damper, which involves disassembling the support plate on the piston rod, manual hammering is commonly used. The support plate, as a thin, annular piece fitted onto the piston rod, typically has an interference fit or tight contact with the piston rod to ensure structural stability during operation. The operator must hold a hammer and repeatedly strike the edge or specific areas of the support plate, using the impact force to loosen the support plate from the piston rod, ultimately removing it from the piston rod.

[0004] Regarding the aforementioned technologies, the inventors believe that the impact force of each strike is limited, and it often requires dozens or even hundreds of repetitions to disassemble a support piece. For batch maintenance or large-scale production scenarios, this would greatly extend the working time and result in low disassembly efficiency. Utility Model Content

[0005] The purpose of this application is to provide a jig for disassembling support plates for hydraulic dampers, so as to improve the problem of low disassembly efficiency of support plates on piston rods.

[0006] This application provides a jig for disassembling support plates for hydraulic shock absorbers, which adopts the following technical solution:

[0007] A jig for disassembling a support plate for a hydraulic shock absorber includes a pressure-relief base with a fixing groove. A piston rod is placed in the fixing groove along the vertical direction. A support plate is provided on the outer wall of the piston rod. A pressure bar connected to the output end of a hydraulic cylinder is provided above the pressure-relief base. A receiving groove for the piston rod to enter is provided at the end of the pressure bar near the support plate. The end of the pressure bar near the support plate can abut against the support plate to disassemble the support plate.

[0008] By adopting the above technical solution, the fixed groove positions the piston rod, and the pressure bar connected to the output end of the hydraulic cylinder replaces manual hammering. The end of the pressure bar near the support plate can directly abut against the support plate, and the support plate is disassembled with the continuous and stable pressure provided by the hydraulic cylinder. Compared with the dispersed impact force of manual hammering, this method can more efficiently overcome the cooperation force between the support plate and the piston rod, greatly reduce the number of operations, and significantly improve disassembly efficiency. It is especially suitable for batch maintenance or large-scale production scenarios.

[0009] Optionally, the bottom surface of the receiving groove is provided with a conical groove.

[0010] By adopting the above technical solution, the conical groove design can enhance the structural strength and stability of the pressure bar receiving groove. During the process of applying pressure by the hydraulic cylinder, it can effectively disperse the force, prevent the pressure bar from deforming or being damaged due to excessive force, ensure that the pressure bar can transmit pressure stably for a long time, and extend the service life of the fixture.

[0011] Optionally, a pressure groove is provided on the inner sidewall of the receiving groove and at one end of the pressure bar near the support plate. The bottom surface of the pressure groove can abut against the top surface of the support plate, and the sidewall of the pressure groove is in contact with the outer sidewall of the support plate.

[0012] By adopting the above technical solution, the bottom surface of the pressure groove abuts against the top surface of the support plate, and the side wall of the pressure groove fits against the outer side wall of the support plate, which increases the contact area between the pressure rod and the support plate, allowing the pressure to be transmitted to the support plate more evenly, improving the force transmission efficiency, and making it easier for the support plate to detach from the piston rod.

[0013] Optionally, the sidewall of the pressure groove is provided with a guide surface at an angle.

[0014] By adopting the above technical solution, the guide surface can guide the pressure bar when it approaches the support plate, so that the support plate can accurately enter the pressure groove, ensuring that the pressure groove and the support plate fit accurately, which improves the convenience and accuracy of operation and further enhances the disassembly efficiency.

[0015] Optionally, a bracket fixing plate is fixedly provided on the top surface of the pressure relief base, and the bracket fixing plate is provided with fixing holes for the piston rod to pass through.

[0016] By adopting the above technical solution, the bracket fixing plate and the fixing hole through which the piston rod passes can limit the piston rod in the horizontal direction, which helps to prevent the piston rod from shifting or shaking during disassembly and enhances the stability of operation.

[0017] Optionally, the bracket fixing plate includes a fixing plate and an insert plate fixed to the fixing plate with a pin. Both the fixing plate and the insert plate are provided with arc-shaped grooves, and two arc-shaped grooves are spliced ​​together to form a fixing hole.

[0018] By adopting the above technical solution, the piston rod can be quickly engaged and fixed during installation, allowing operators to easily position the piston rod while ensuring a stable fixation effect.

[0019] Optionally, the top surface of the pressure relief base is provided with an annular gasket, and the bracket fixing plate is located on the annular gasket.

[0020] By adopting the above technical solution, the bracket fixing plate is positioned on the annular gasket, which can buffer and level the bracket fixing plate, reduce the impact on the pressure relief base and bracket fixing plate during pressure transmission, and reduce component wear.

[0021] Optionally, the top surface of the pressure relief base is provided with a locking groove corresponding to the annular gasket.

[0022] By adopting the above technical solution, the locking groove can position the annular gasket, prevent the annular gasket from shifting during use, ensure that the annular gasket is always in the correct position, and continuously play a buffering and leveling role, further improving the stability and reliability of the overall structure of the fixture.

[0023] In summary, this application includes at least one of the following beneficial technical effects of the hydraulic damper support plate disassembly fixture:

[0024] 1. The piston rod is positioned by a fixed groove. A pressure bar connected to the output end of the hydraulic cylinder is used to replace manual hammering. The end of the pressure bar near the support plate can directly abut against the support plate. The support plate is disassembled with the continuous and stable pressure provided by the hydraulic cylinder. Compared with the dispersed impact force of manual hammering, this method can more efficiently overcome the cooperation force between the support plate and the piston rod, greatly reduce the number of operations, and significantly improve disassembly efficiency. It is especially suitable for batch maintenance or large-scale production scenarios.

[0025] 2. The bottom surface of the pressure groove abuts against the top surface of the support plate, and the side wall of the pressure groove fits against the outer side wall of the support plate, which increases the contact area between the pressure rod and the support plate, allowing the pressure to be transmitted to the support plate more evenly, improving the force transmission efficiency, and making it easier for the support plate to detach from the piston rod;

[0026] 3. The bracket fixing plate and the fixing hole through which the piston rod passes can limit the piston rod in the horizontal direction, which helps to prevent the piston rod from shifting or shaking during disassembly and enhances the stability of operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the disassembly fixture for the support plate of the hydraulic shock absorber;

[0028] Figure 2 This is a schematic diagram illustrating the pressure bar structure in Embodiment 1;

[0029] Figure 3 This is a schematic diagram illustrating the structure of the bracket fixing plate in the embodiment;

[0030] Figure 4 This is a schematic diagram illustrating the annular gasket structure in the embodiment;

[0031] Figure 5 This is a schematic diagram illustrating the pressure bar structure in Example 2.

[0032] In the diagram, 1 is the pressure relief base; 11 is the fixing groove; 12 is the engaging groove; 2 is the piston rod; 21 is the support plate; 3 is the pressure bar; 31 is the receiving groove; 311 is the conical groove; 4 is the pressure groove; 41 is the guide surface; 5 is the bracket fixing plate; 51 is the fixing plate; 52 is the insert plate; 53 is the arc groove; 54 is the fixing hole; and 6 is the annular gasket. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below. Example

[0034] A jig for disassembling support plates for hydraulic shock absorbers, as shown in the reference. Figure 1 The device includes a pressure relief base 1, which is a block structure made of metal. A fixing groove 11 is provided through the top of the base. The shape of the fixing groove 11 is adapted to the shape of the bottom of the piston rod 2. The piston rod 2 is placed in the fixing groove 11 along the vertical direction. The piston rod 2 is a cylindrical component on the hydraulic shock absorber and can stand stably in the fixing groove 11.

[0035] Reference Figure 1 , Figure 2 A support plate 21 is fitted on the outer wall of the piston rod 2. The support plate 21 is an annular thin plate that has an interference fit or a tight fit with the piston rod 2. A pressure rod 3 is provided above the pressure relief base 1 and is connected to the output end of the hydraulic cylinder. The pressure rod 3 is a cylindrical rod made of metal. It is connected to the output end of the hydraulic cylinder through a flange. That is, a flange is welded to one end of the pressure rod 3, and a corresponding flange is provided at the output end of the hydraulic cylinder. The two flanges are connected together by bolts, so that the pressure rod 3 can move up and down with the output end of the hydraulic cylinder.

[0036] Reference Figure 1 , Figure 2The pressure rod 3 has a receiving groove 31 at one end near the support plate 21 for the piston rod 2 to enter. The receiving groove 31 is a recessed cylindrical groove with a diameter larger than that of the piston rod 2. The bottom surface of the receiving groove 31 has a conical groove 311, which is concave upward from the center of the bottom surface of the receiving groove 31 and is conical. This design can increase the structural strength and stability of the bottom of the receiving groove 31. The end of the pressure rod 3 near the support plate 21 can abut against the support plate 21 to disassemble the support plate 21. When the hydraulic cylinder drives the pressure rod 3 to move downward, the end of the pressure rod 3 near the support plate 21 will contact and squeeze the support plate 21, causing the support plate 21 to fall off the piston rod 2.

[0037] Reference Figure 2 A pressure groove 4 is provided on the inner side wall of the receiving groove 31 and at the end of the pressure rod 3 near the support plate 21. The pressure groove 4 is an annular groove surrounding the inner side wall of the receiving groove 31 with a moderate depth. The bottom surface of the pressure groove 4 can abut against the top surface of the support plate 21. The bottom surface of the pressure groove 4 is flat and can fully contact the top surface of the support plate 21. The side wall of the pressure groove 4 fits against the outer side wall of the support plate 21, that is, the diameter of the side wall of the pressure groove 4 matches the outer diameter of the support plate 21. The side wall of the pressure groove 4 is inclined with a guide surface 41. The guide surface 41 is inclined from the end edge of the pressure rod 3 towards the inner side wall of the pressure groove 4, which guides the support plate 21 into the pressure groove 4, so that the pressure rod 3 can contact the support plate 21 more accurately.

[0038] Reference Figure 3 , Figure 4 The top surface of the pressure relief base 1 is fixed with a bracket fixing plate 5 by bolts. Specifically, threaded holes are opened on the top surface of the pressure relief base 1 and the bracket fixing plate 5 respectively. The bolts pass through the threaded holes to fasten the two together. The bracket fixing plate 5 is provided with a fixing hole 54 for the piston rod 2 to pass through. The diameter of the fixing hole 54 is slightly larger than the diameter of the piston rod 2 to ensure that the piston rod 2 can pass through smoothly without excessive shaking.

[0039] Reference Figure 3 , Figure 4 The bracket fixing plate 5 includes a fixing plate 51 and a plug plate 52 fixed to the fixing plate 51 by a pin. Both the fixing plate 51 and the plug plate 52 are metal plates. Specifically, the plug plate 52 has two cylindrical plug rods integrally formed on the side facing the fixing plate 51. The plug rods are set perpendicular to the plug plate 52. The fixing plate 51 has two cylindrical holes corresponding to the positions of the plug rods. The diameter of the holes matches the diameter of the plug rods. The plug rods can be inserted into the holes to achieve a fixed connection between the two.

[0040] Reference Figure 3 , Figure 4Both the fixing plate 51 and the insert plate 52 have arc-shaped grooves 53 on their opposite sides. The radius of the arc-shaped grooves 53 is the same as the radius of the piston rod 2. When the insert plate 52 and the fixing plate 51 are fixed by the pin, the two arc-shaped grooves 53 form a complete circular fixing hole 54.

[0041] Reference Figure 1 , Figure 4 The top surface of the pressure relief base 1 is provided with an annular gasket 6, which is made of rubber or metal. Its inner diameter is slightly larger than the diameter of the fixing groove 11, and its outer diameter is adapted to the bottom size of the bracket fixing plate 5. The bracket fixing plate 5 is located on the annular gasket 6. The annular gasket 6 can play a certain role in buffering and leveling the bracket fixing plate 5. The top surface of the pressure relief base 1 is provided with a locking groove 12 corresponding to the position of the annular gasket 6. The locking groove 12 is an upwardly recessed annular groove whose shape and size match the annular gasket 6. The annular gasket 6 can be embedded in the locking groove 12 to achieve positioning and prevent the annular gasket 6 from shifting during use. Example

[0042] Reference Figure 5 The difference between this embodiment and the previous one is that the inner wall of the pressure groove 4 is arc-shaped, so as to press the lip of the support piece 21 inward and fix it on the piston rod 2, thereby achieving the purpose of quickly installing the support piece 21.

[0043] The implementation principle of this application embodiment is as follows:

[0044] In actual use, first place the pressure relief base 1 on a stable workbench, embed the annular gasket 6, put the bottom of the piston rod 2 into the fixing groove 11, and then install the bracket fixing plate 5 and fix it with a pin to limit the piston rod 2; then align the pressure bar 3 connected to the hydraulic cylinder with the piston rod 2, start the hydraulic cylinder to move the pressure bar 3 down, guide it through the guide surface 41 to make the pressure groove 4 fit with the support plate 21, and transmit the concentrated continuous pressure of the hydraulic cylinder through the pressure bar 3 to overcome the cooperation force between the support plate 21 and the piston rod 2 and make it fall off. After completion, the pressure bar 3 is reset. The whole process replaces manual knocking with mechanical force, and the positioning and limiting of each component ensures accurate force transmission and stable operation, which significantly improves disassembly efficiency.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A jig for disassembling support plates for hydraulic vibration dampers, characterized in that: The device includes a pressure relief base (1), which is provided with a fixing groove (11). A piston rod (2) is placed in the fixing groove (11) along the vertical direction. A support plate (21) is provided on the outer wall of the piston rod (2). A pressure bar (3) connected to the output end of a hydraulic cylinder is provided above the pressure relief base (1). A receiving groove (31) for the piston rod (2) to enter is provided at one end of the pressure bar (3) near the support plate (21). The end of the pressure bar (3) near the support plate (21) can abut against the support plate (21) to disassemble the support plate (21).

2. The hydraulic damper support plate disassembly fixture according to claim 1, characterized in that: The bottom surface of the receiving groove (31) is provided with a conical groove (311).

3. The hydraulic damper support plate disassembly fixture according to claim 2, characterized in that: The inner sidewall of the receiving groove (31) and the end of the pressure bar (3) near the support plate (21) are provided with a pressure groove (4). The bottom surface of the pressure groove (4) can abut against the top surface of the support plate (21), and the sidewall of the pressure groove (4) is in contact with the outer sidewall of the support plate (21).

4. The hydraulic damper support plate disassembly fixture according to claim 3, characterized in that: The sidewall of the pressure groove (4) is provided with a guide surface (41) at an inclination.

5. The hydraulic damper support plate disassembly fixture according to claim 1, characterized in that: The top surface of the pressure relief base (1) is fixedly provided with a bracket fixing plate (5), and the bracket fixing plate (5) is provided with a fixing hole (54) for the piston rod (2) to pass through.

6. The hydraulic damper support plate disassembly fixture according to claim 5, characterized in that: The bracket fixing plate (5) includes a fixing plate (51) and a plug plate (52) fixed to the fixing plate (51) by a pin. Both the fixing plate (51) and the plug plate (52) are provided with arc grooves (53), and two arc grooves (53) are spliced ​​together to form a fixing hole (54).

7. A jig for disassembling a support plate for a hydraulic vibration damper according to claim 6, characterized in that: The top surface of the pressure relief base (1) is provided with an annular gasket (6), and the bracket fixing plate (5) is located on the annular gasket (6).

8. A jig for disassembling a support plate for a hydraulic vibration damper according to claim 7, characterized in that: The top surface of the pressure relief base (1) is provided with a locking groove (12) corresponding to the annular gasket (6).

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