A damper damping adjustment valve

Abstract

The utility model relates to shock absorber technical field discloses a shock absorber damping adjusting valve, including piston rod, and the main body piston of setting on piston rod, the main body piston will shock absorber work cylinder divide into two parts of no.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, and in particular to a vibration damper damping adjustment valve. Background Technology

[0002] A damper damping regulating valve, with application number CN201810271664.X, mainly includes: a piston rod, a limit block, a valve plate assembly, a piston, a spring, a spring positioning seat, a fastening nut, a throttle valve core, and a sealing ring. This valve can be applied to single-tube and twin-tube shock absorbers. The throttle valve core, installed in the piston, automatically senses road vibration and automatically switches to a suitable damping value. The damping characteristics of the shock absorber equipped with this damping regulating valve will automatically change with driving conditions, be steplessly adjustable, and have a large adjustment range, giving the vehicle excellent ride comfort and handling. Furthermore, this damping regulating valve has advantages such as simple structure, sensitive response, high reliability, no need for sensors or power sources, and low cost.

[0003] However, in practice, it has been found that the throttling valve core of the damper regulating valve is mostly driven by a spring for position adjustment: when the damper is working, the spring pushes the valve core to move through its own elastic deformation to change the opening of the throttling channel, thereby adjusting the damping force. However, during long-term use, the spring needs to return to its original position with the valve core through high-frequency extension and contraction. Under continuous alternating stress, the spring material is prone to fatigue damage, leading to a gradual decrease in elasticity, or even permanent deformation or breakage. Once the spring fails, the throttling valve core cannot return to its original position accurately, causing abnormal damping adjustment. This can range from affecting the damper's buffering performance to causing the valve core to jam, leading to damper failure and seriously affecting the stability and safety of equipment operation. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a damping regulating valve for a shock absorber to solve the above-mentioned shortcomings in the prior art.

[0005] Technical solution: A damping regulating valve for a shock absorber includes a piston rod and a main piston mounted on the piston rod. The main piston divides the working cylinder of the shock absorber into two parts: a first oil chamber and a second oil chamber. A channel G is provided in the middle of the main piston. An oil throttling valve core is installed inside the channel G. A vertically arranged channel A and a channel C are provided on the piston rod. The channel C is arranged to communicate with the first oil chamber. The lower end of the channel A is arranged to communicate with the second oil chamber. The first oil chamber and the second oil chamber are respectively connected by a channel F and a channel E.

[0006] Furthermore, both channels F and E are equipped with sealing sleeves, and each sealing sleeve is equipped with an active piston. The active piston is connected to a force-bearing block via a push rod, and the force-bearing blocks are respectively arranged inside channels F and E. The sealing sleeve is also equipped with a passive piston, which is connected to a push block via a connecting rod, and the push block is connected to the end of the throttle valve core.

[0007] As a further description of the above technical solution: guide blocks are respectively provided inside the channels F and E, and each guide block is provided with a groove. A slider is slidably connected inside the groove, and the slider is connected to the corresponding force block.

[0008] As a further description of the above technical solution: a second sealing ring is provided at the connection between the push rod and the connecting rod and the sealing sleeve.

[0009] As a further description of the above technical solution: a No. 1 sealing ring is provided on the outer side of the main piston, located inside the working cylinder of the shock absorber.

[0010] As a further description of the above technical solution: the left half of channel E is connected to the left half of channel G, and the right half of channel F is connected to the right half of channel G.

[0011] As a further description of the above technical solution: a flow valve plate group and a recovery valve plate group are arranged sequentially above and below the main piston, and an upper limit block is arranged above the flow valve plate group and a lower limit block is arranged below the recovery valve plate group.

[0012] As a further description of the above technical solution: the throttle valve core is provided with a channel B.

[0013] As a further description of the above technical solution: a bolt for fastening the lower limit block is provided below the lower limit block.

[0014] Beneficial effects: The inert gas inside the sealed sleeve, in conjunction with the active and passive pistons, drives the throttle valve core, replacing the traditional spring-driven structure. The pressure transmission of the inert gas enables the smooth movement and reset of the valve core, avoiding the fatigue failure problem caused by long-term alternating stress of the spring, and significantly improving the service life and reliability of the damping adjustment mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of a damper damping regulating valve proposed in this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of a partial structure of the present invention from another perspective.

[0018] Legend:

[0019] 1. Piston rod; 2. Upper limit block; 3. Flow valve plate assembly; 4. Main piston; 5. No. 1 sealing ring; 6. Sealing sleeve; 7. Active piston; 8. Push rod; 9. Force-bearing block; 10. No. 2 sealing ring; 11. Passive piston; 12. Connecting rod; 13. Push block; 14. Guide block; 15. Slide groove; 16. Sliding block; 17. Restoration valve plate assembly; 18. Lower limit block; 19. Bolt; 20. Throttling valve core; 21. No. 1 oil chamber; 22. Channel A; 23. Channel B; 24. Channel C; 25. No. 2 oil chamber; 26. Channel E; 27. Channel F; 28. Channel G. Detailed Implementation

[0020] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1-3 A damping regulating valve for a shock absorber includes a piston rod 1 and a main piston 4 disposed on the piston rod 1. The main piston 4 divides the working cylinder of the shock absorber into two parts: a first oil chamber 21 and a second oil chamber 25. A channel G28 is provided in the middle of the main piston 4. A vertical and through channel A22 and a channel C24 are provided on the piston rod 1. The channel C24 is through the first oil chamber 21. The lower end of the channel A22 is through the second oil chamber 25. The first oil chamber 21 and the second oil chamber 25 are respectively connected by a channel F27 and a channel E26.

[0022] Furthermore, both channels F27 and E26 are equipped with sealing sleeves 6, and each sealing sleeve 6 is equipped with an active piston 7. The active piston 7 is connected to a force-receiving block 9 via a push rod 8, and the force-receiving blocks 9 are respectively arranged inside channels F27 and E26. The sealing sleeve 6 is also equipped with a passive piston 11, and the passive piston 11 is connected to a push block 13 via a connecting rod 12. The push block 13 is connected to the end of the throttle valve core 20. It should be noted that the sealing sleeve 6 is filled with inert gas and is located between the active piston 7 and the passive piston 11.

[0023] Furthermore, guide blocks 14 are respectively provided inside the channels F27 and E26. Each guide block 14 is provided with a groove 15. A slider 16 is slidably connected inside the groove 15. The slider 16 is connected to the corresponding force block 9 and plays a limiting and guiding role, which can prevent the force block 9 from tilting.

[0024] Furthermore, a second sealing ring 10 is provided at the connection between the push rod 8 and the connecting rod 12 and the sealing sleeve 6, which serves to seal and prevent the inert gas inside the sealing sleeve 6 from escaping.

[0025] Furthermore, a first sealing ring 5 located on the outer side of the main piston 4 is provided in the working cylinder of the shock absorber, which serves to seal and prevent oil circuit connection.

[0026] Furthermore, the left half of channel E26 is connected to the left half of channel G28, and the right half of channel F27 is connected to the right half of channel G28.

[0027] Furthermore, a flow valve plate group 3 and a recovery valve plate group 17 are arranged sequentially above and below the main piston 4, and an upper limit block 2 is arranged above the flow valve plate group 3, and a lower limit block 18 is arranged below the recovery valve plate group 17.

[0028] Furthermore, the throttle valve core 20 is provided with a channel B23 to provide a passage for the hydraulic oil inside 21 and 25.

[0029] Furthermore, a bolt 19 for fastening the lower limit block 18 is provided below the lower limit block 18.

[0030] The general working principle is as follows: When encountering bumps, sudden braking, rapid steering, or rapid acceleration, the compression stroke is as follows: the main piston 4 moves downward, the oil pressure inside the first oil chamber 21 decreases, and the oil pressure inside the second oil chamber 25 increases. This creates a pressure difference between the second oil chamber 25 and the sealing sleeve 6, causing the force block 9 on the left half to push the active piston 7 upward through the push rod 8. The passive piston 11 then pushes the push block 13 through the connecting rod 12. The push block 13 moves the throttle valve core 20, and the left side of the throttle valve core 20 blocks the passage A22. The damping increases, thereby achieving the effect of shock absorption. During this process, the active piston 7 inside the right half of the sealing sleeve 6 also moves upward due to the decrease in oil pressure, avoiding movement conflict and restoring the stroke. In the process described above, the active piston 7 and the passive piston 11 inside the sealing sleeve 6 cooperate to change the existing method of using spring reset adjustment. The shock absorber has a longer service life and will not have the problem of spring force decay due to long-term use, which would affect the normal use of the shock absorber.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A damping regulating valve for a shock absorber, comprising a piston rod and a main piston disposed on the piston rod, the main piston dividing the shock absorber working cylinder into two parts, a first oil chamber and a second oil chamber, and a channel G is provided in the middle of the main piston, an oil throttling valve core is disposed inside the channel G, and a vertically arranged channel A and a channel C are provided on the piston rod, the channel C communicating with the first oil chamber, and the lower end of the channel A communicating with the second oil chamber, characterized in that... The first oil chamber and the second oil chamber are sequentially connected by channels F and E, respectively. Furthermore, both channels F and E are equipped with sealing sleeves, and each sealing sleeve is equipped with an active piston. The active piston is connected to a force-bearing block via a push rod, and the force-bearing blocks are respectively arranged inside channels F and E. The sealing sleeve is also equipped with a passive piston, which is connected to a push block via a connecting rod, and the push block is connected to the end of the throttle valve core.

2. The damping regulating valve for a shock absorber according to claim 1, characterized in that, The interior of channels F and E are respectively provided with guide blocks, each of which is provided with a groove. A slider is slidably connected inside the groove, and the slider is connected to the corresponding force block.

3. The damping regulating valve for a shock absorber according to claim 1, characterized in that, The push rod and connecting rod are each equipped with a No. 2 sealing ring at the connection point with the sealing sleeve.

4. The damping regulating valve for a shock absorber according to claim 3, characterized in that, The outer side of the main piston is provided with a No. 1 sealing ring located inside the working cylinder of the shock absorber.

5. A damper damping regulating valve according to claim 1, characterized in that, The left half of channel E is connected to the left half of channel G, and the right half of channel F is connected to the right half of channel G.

6. A damping regulating valve for a shock absorber according to claim 1, characterized in that, A flow valve plate group and a recovery valve plate group are arranged sequentially above and below the main piston, with an upper limit block above the flow valve plate group and a lower limit block below the recovery valve plate group.

7. A damper damping regulating valve according to claim 1, characterized in that, The throttling valve core has a channel B.

8. A damper damping regulating valve according to claim 6, characterized in that, A bolt for fastening the lower limit block is provided below the lower limit block.

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