Multi-plate valve system structure of shock absorber

Abstract

The multi-plate valve system structure of the shock absorber is applied to the field of shock absorbers and comprises a piston block, a valve seat is arranged at one end of the piston block, a piston rod penetrating through the valve seat and the piston block is arranged on the valve seat, a limiting device used for limiting the piston block is arranged on the piston rod, the outer edge of the valve seat is sleeved with a throttling valve plate, and the throttling valve plate is arranged on the outer edge of the piston block. A plurality of oil drainage holes are formed in the throttling valve plate, a plurality of circulation holes are formed in the piston block, a valve plate set is arranged between the throttling valve plate and the piston block, and the valve plate set is used for reducing damping force generated when the shock absorber moves at a low speed. The damper has the technical effects that when the damper rebounds, damping oil flows into the circulation hole of the piston block from the multiple oil drainage holes in the throttling valve plate, if the speed reducer is in a low-speed motion state, the damping force generated when the damper moves at a low speed is reduced through the valve plate set, it is guaranteed that the damping force is not too high at the low speed, and abnormal sounds of the damper are reduced.

Description

Technical Field

[0001] This application relates to the field of shock absorber technology, and in particular to a multi-plate valve system structure for a shock absorber. Background Technology

[0002] The valve system of the shock absorber is a key component of the shock absorber, which uses the flow of damping oil to generate damping force.

[0003] There are two basic types of shock absorber valve system structures: single-plate valve system and multi-plate valve system. Multi-plate valve system has better shock absorption effect compared with single-plate valve system. In related technologies, multi-plate valve system includes a piston rod, a piston block is sleeved on the outer edge of the piston rod, a valve seat is installed at one end of the piston block, and a throttling valve plate is sleeved on the outer edge of the valve seat. Damping oil flows from the oil drain hole of the throttling valve plate into the flow hole of the piston block. Damping oil can absorb and disperse impact force, thereby achieving vibration attenuation.

[0004] During use, the damping oil flows directly from the drain hole of the throttle valve plate into the flow hole in the piston block, causing the damper to have excessive damping at low speeds, which leads to abnormal noise from the damper. Summary of the Invention

[0005] To address the issue of excessive damping and resulting abnormal noise in multi-plate valve systems during low-speed operation, this application provides a multi-plate valve system for shock absorbers, employing the following technical solution: It includes a piston block, one end of which is provided with a valve seat. A piston rod passes through the valve seat and the piston block. A limiting device for restricting the piston block's movement is provided on the piston rod. A throttling valve plate is fitted around the outer edge of the valve seat. The throttling valve plate has several oil drain holes. The piston block has several flow holes. A valve plate assembly is provided between the throttling valve plate and the piston block. This valve plate assembly is used to reduce the damping force of the shock absorber during low-speed operation.

[0006] In one specific implementation, the valve plate assembly includes a support valve plate, an elastic valve plate, and a relief valve plate sequentially sleeved on the outer edge of the valve seat. The relief valve plate is pressed against the elastic valve plate and the throttling valve plate. A flow gap is provided between the elastic valve plate and the throttling valve plate, and a plurality of the flow holes communicate with the flow gap.

[0007] In one specific implementation, the limiting device includes a fixing nut threaded to one end of the piston rod, and the piston block abuts against the fixing nut and the supporting valve plate.

[0008] In one specific implementation scheme, the piston block has a mounting groove on its surface away from the valve seat that communicates with several flow holes, and the fixing nut is located entirely within the mounting groove.

[0009] In one specific implementation, a sealing groove is provided on the outer edge of the piston block, and a sealing ring matching the sealing groove is provided inside the sealing groove.

[0010] In one specific implementation, the sealing ring includes a first half-ring and a second half-ring, wherein the contact surfaces of the first half-ring and the second half-ring are both inclined surfaces.

[0011] In one specific implementation, an elastic element is fitted around the outer edge of the valve seat, and the elastic element abuts against the throttle valve plate and the valve seat.

[0012] In one specific implementation, the elastic element is a wave spring.

[0013] In one specific implementation, the piston block has a positioning groove on its surface facing the valve seat that matches the valve seat, and the valve seat portion is inserted into the positioning groove.

[0014] In one specific implementation, the resilient valve plate is made of SK5 or 65Mn material.

[0015] In summary, this application has the following beneficial technical effects: when the shock absorber rebounds, the damping oil flows from several drain holes on the throttle valve plate into the flow hole of the piston block. If the reducer is in a low-speed motion state, the valve plate group is used to reduce the damping force of the shock absorber at low speed, ensuring that the damping force is not too high at low speed, and reducing the generation of abnormal noise from the shock absorber. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is an exploded schematic diagram used to illustrate the valve seat in the embodiments of this application.

[0018] Figure 3 This is a schematic diagram illustrating the structure of the elastic valve plate in the embodiments of this application.

[0019] Figure 4 yes Figure 3 Enlarged diagram of point A in the middle.

[0020] Reference numerals in the attached drawings: 1. Piston block; 2. Valve seat; 3. Piston rod; 4. Throttling valve plate; 5. Flow hole; 6. Valve plate assembly; 7. Support valve plate; 8. Elastic valve plate; 9. Drain valve plate; 10. Flow gap; 11. Fixing nut; 12. Mounting groove; 13. Sealing groove; 14. Sealing ring; 15. First half ring; 16. Second half ring; 17. Wave spring; 18. Oil drain hole. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0022] This application discloses a multi-plate valve system structure for a shock absorber.

[0023] Reference Figure 1 , Figure 2 and Figure 3 The multi-plate valve system structure of the shock absorber includes a piston block 1 disposed inside the shock absorber. A valve seat 2 is installed at one end of the piston block 1. A positioning groove matching the size of the valve seat 2 is opened on the surface of the piston block 1 facing the valve seat 2. The valve seat 2 is partially inserted into the positioning groove. In the embodiment of this application, the piston block 1 and the valve seat 2 are coaxially arranged. The positioning groove plays a limiting role in the position of the valve seat 2, reducing the possibility of the valve seat 2's position shift and improving the stability of the valve seat 2 installed on the piston seat.

[0024] Reference Figure 1 , Figure 2 and Figure 3 A piston rod 3, passing through both the valve seat 2 and the piston block 1, is disposed at the center of the valve seat 2. A limiting device for limiting the piston block 1 is provided on the piston rod 3. A throttling valve plate 4 is fitted around the outer edge of the valve seat 2. The throttling valve plate 4 has several drain holes 18. The number and diameter of the drain holes 18 can be adjusted according to the actual model of the shock absorber to control the flow rate of the damping oil. In this embodiment, four drain holes 18 are arranged in a circular array on the throttling valve plate 4. Several flow holes 5 are provided on the piston block 1. In this embodiment, four flow holes 5 are arranged in a circular array along the piston block 1. A valve plate assembly 6 is provided between the throttling valve plate 4 and the piston block 1. The valve plate assembly 6 is used to reduce the damping force when the shock absorber moves at low speeds.

[0025] Therefore, when the shock absorber rebounds, the damping oil flows from several drain holes 18 on the throttle valve plate 4 into the flow hole 5 of the piston block 1. If the reducer is in a low-speed state, the valve plate group 6 is used to reduce the damping force of the shock absorber at low speed, ensuring that the damping force is not too high at low speed and reducing the generation of abnormal noise from the shock absorber.

[0026] Reference Figure 3 and Figure 4The valve plate assembly 6 includes a support valve plate 7, an elastic valve plate 8, and a relief valve plate 9 sequentially sleeved on the outer edge of the valve seat 2. The relief valve plate 9 abuts against the elastic valve plate 8 and the throttling valve plate 4. In this embodiment, the diameter of the relief valve plate 9 is smaller than the diameters of the elastic valve plate 8 and the throttling valve plate 4, meaning there is a flow gap 10 between the elastic valve plate 8 and the throttling valve plate 4. All four flow holes 5 communicate with the flow gap 10, allowing damping oil to flow between the drain hole 18, the flow gap 10, and the flow holes 5. The elastic valve plate 8 is made of SK4, SK5, or 65Mn material. SK4 and SK5 are both high-wear-resistant carbon tool steels, while 65Mn is a high-quality carbon structural steel commonly used to manufacture springs and other parts requiring high strength, high hardness, and good elasticity. In this embodiment, the elastic valve plate 8 is made of SK5 material.

[0027] Therefore, the damping oil flows in through the drain hole 18 on the throttle valve plate 4. Because it is supported by the drain valve plate 9, there is a flow gap 10 between the throttle valve plate 4 and the elastic valve plate 8. When the shock absorber moves at low speed, the damping oil mainly drains through this flow gap 10. Since the flow gap 10 is small and the flow rate is limited, the damping force generated is also relatively low, thereby reducing the possibility of abnormal noise caused by excessive damping force when the shock absorber is running at low speed. This helps the shock absorber maintain the stability of vehicle components when running at low speed. When the shock absorber moves at high speed and the flow rate of the flow gap 10 is insufficient, the damping oil exerts pressure on the elastic valve plate 8, causing the elastic valve plate 8 to bend and deform and open. After the valve opens, the flow channel of the damping oil increases, thereby generating a higher damping force. This helps the shock absorber to better disperse and absorb impact force when running at high speed. In addition, the support valve plate 7 serves as the basic support for the deformation of the elastic valve plate 8. By adjusting the outer diameter of the support valve plate 7, the deformation stiffness of the elastic valve plate 8 can be adjusted, thereby generating different damping forces. This application can also ensure that the shock absorber has good damping effect in both low-speed and high-speed operation, with high flexibility and wide applicability.

[0028] Reference Figure 3 and Figure 4 An elastic element is fitted around the outer edge of the valve seat 2, and the elastic element abuts against the throttle valve plate 4 and the valve seat 2. The elastic element is a wave spring 17. Therefore, the wave spring 17 applies a pre-compression force to the throttle valve plate 4, so that the throttle valve plate 4 is always in contact with the relief valve plate 9, reducing the possibility of the throttle valve plate 4 becoming loose.

[0029] Reference Figure 1 and Figure 2The limiting device includes a fixing nut 11 threaded to one end of the piston rod 3. The piston block 1 is pressed against the fixing nut 11 and the supporting valve plate 7. The fixing nut 11 limits the position of the piston block 1, reducing the possibility of the piston block 1 disengaging from the piston rod 3. The piston block 1 has a mounting groove 12 on the surface away from the valve seat 2, which communicates with several flow holes 5. The fixing nut 11 is entirely located within the mounting groove 12, reducing the possibility of interference between the fixing nut 11 and external components, and also reducing the axial space occupied by the multi-plate valve system structure of the shock absorber.

[0030] Reference Figure 1 and Figure 2 A sealing groove 13 is provided on the outer edge of the piston block 1. A sealing ring 14 matching the size of the sealing groove 13 is provided in the sealing groove 13. The sealing groove 13 limits the position of the sealing ring 14, reducing the possibility of the sealing ring 14 shifting position. In this embodiment, the sealing ring 14 includes a first half ring 15 and a second half ring 16. The two ends of the first half ring 15 and the second half ring 16 are tightly fitted to form the sealing ring 14. The contact surfaces of the first half ring 15 and the second half ring 16 are both inclined surfaces, which facilitates the assembly of the sealing ring 14 into the sealing groove 13 and improves the convenience of the assembly process.

[0031] It should be noted that, compared with the existing multi-plate valve system structure of shock absorbers, this application can ensure that the damping force of the shock absorber does not exceed 120N when the shock absorber is running at low speed, reducing the possibility of abnormal noise caused by excessive damping force when the shock absorber is running at low speed. At the same time, the damping force of the shock absorber when running at high speed can be adjusted by adjusting the outer diameter of the supporting valve plate 7 to adapt to a wider range of actual use needs. It can also ensure that the shock absorber has good damping effect in both low-speed and high-speed operation, with high flexibility and wide applicability.

[0032] The implementation principle of this application embodiment is as follows: the damping oil flows in through the drain hole 18 on the throttle valve plate 4. Because it is supported by the drain valve plate 9, there is a flow gap 10 between the throttle valve plate 4 and the elastic valve plate 8. When the shock absorber moves at low speed, the damping oil mainly drains through the flow gap 10. Since the flow gap 10 is small and the drainage flow is limited, the damping force generated is also relatively low, thereby reducing the possibility of abnormal noise caused by excessive damping force when the shock absorber is running at low speed. This helps the shock absorber maintain the stability of vehicle and other components when running at low speed. When the shock absorber moves at high speed and the drainage flow of the flow gap 10 is insufficient, the damping oil exerts pressure on the elastic valve plate 8, causing the elastic valve plate 8 to bend and deform and open the valve. After the valve opens, the flow channel of the damping oil increases, thereby generating a higher damping force. This helps the shock absorber to better disperse and absorb impact force when running at high speed. In addition, the support valve plate 7 serves as the basic support for the deformation of the elastic valve plate 8. By adjusting the outer diameter of the support valve plate 7, the deformation stiffness of the elastic valve plate 8 can be adjusted, thereby generating different damping forces. This application can also ensure that the shock absorber has good damping effect in both low-speed and high-speed operation, with high flexibility and wide applicability.

[0033] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A multi-plate valve system structure for a shock absorber, characterized in that: The device includes a piston block (1), one end of which is provided with a valve seat (2). The valve seat (2) is provided with a piston rod (3) that passes through the valve seat (2) and the piston block (1). The piston rod (3) is provided with a limiting device for limiting the piston block (1). The outer edge of the valve seat (2) is provided with a throttle valve plate (4). The throttle valve plate (4) is provided with several oil drain holes (18). The piston block (1) is provided with several flow holes (5). A valve plate group (6) is provided between the throttle valve plate (4) and the piston block (1). The valve plate group (6) is used to reduce the damping force when the shock absorber moves at low speed.

2. The multi-plate valve system structure of the shock absorber according to claim 1, characterized in that: The valve plate assembly (6) includes a support valve plate (7), an elastic valve plate (8) and a drain valve plate (9) sequentially sleeved on the outer edge of the valve seat (2). The drain valve plate (9) is pressed between the elastic valve plate (8) and the throttling valve plate (4). A flow gap (10) is provided between the elastic valve plate (8) and the throttling valve plate (4). A plurality of the flow holes (5) are connected to the flow gap (10).

3. The multi-plate valve system structure of the shock absorber according to claim 2, characterized in that: The limiting device includes a fixing nut (11) threaded to one end of the piston rod (3), and the piston block (1) abuts against the fixing nut (11) and the supporting valve plate (7).

4. The multi-plate valve system structure of the shock absorber according to claim 3, characterized in that: The piston block (1) has an installation groove (12) on its surface away from the valve seat (2) that communicates with several flow holes (5), and the fixing nut (11) is located entirely in the installation groove (12).

5. The multi-plate valve system structure of the shock absorber according to claim 1, characterized in that: The piston block (1) has a sealing groove (13) on its outer edge, and a sealing ring (14) matching the sealing groove (13) is provided in the sealing groove (13).

6. The multi-plate valve system structure of the shock absorber according to claim 5, characterized in that: The sealing ring (14) includes a first half-ring (15) and a second half-ring (16), and the contact surfaces of the first half-ring (15) and the second half-ring (16) are both inclined surfaces.

7. The multi-plate valve system structure of the shock absorber according to claim 1, characterized in that: The outer edge of the valve seat (2) is fitted with an elastic element, which abuts against the throttle valve plate (4) and the valve seat (2).

8. The multi-plate valve system structure of the shock absorber according to claim 7, characterized in that: The elastic element is a wave spring (17).

9. The multi-plate valve system structure of the shock absorber according to claim 1, characterized in that: The piston block (1) has a positioning groove on its surface facing the valve seat (2) that matches the valve seat (2), and the valve seat (2) is partially inserted into the positioning groove.

10. The multi-plate valve system structure of the shock absorber according to claim 2, characterized in that: The elastic valve plate (8) is made of SK5 material or 65Mn material.

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