Damping valve, shock absorber, shock absorption system and vehicle

By introducing elastic elements and the first pilot valve into the damping valve, the damping in the compressed state can be adjusted separately, which solves the problem of poor damping adjustment capability in the prior art and improves the vibration damping effect of the vibration damper.

CN120027161APending Publication Date: 2025-05-23BYD CO LTD
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Patent Information

Application Number
CN202510085103.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-05-23

AI Technical Summary

Technical Problem

Existing damping valves are difficult to adjust the damping separately during restoration and compression, resulting in poor damping adjustment capabilities.

Method used

A damping valve including a valve seat assembly, a valve slide, a first pilot valve and an elastic element is designed. The preload force is provided by the elastic element, and the first pilot valve is controlled to adjust the on-off between the compression chamber and the first passage, so as to achieve individual adjustment of the damping in the compressive state.

Benefits of technology

It improves the damping adjustment performance of the damping valve in the compressed state, expands the application scenario of the damping valve, and enhances the vibration damping effect of the vibration damper.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120027161A_ABST
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Abstract

The invention provides a damping valve, a shock absorber, a shock absorption system and a vehicle, and belongs to the technical field of vehicle parts, the damping valve is applied to the shock absorber, the shock absorber comprises a recovery cavity and a compression cavity, and the shock absorber comprises a valve seat assembly, a valve sliding block, a first pilot valve and an elastic element. The valve sliding block and the valve seat assembly are arranged in the first direction, the valve sliding block is provided with a first channel, the first channel is suitable for being communicated with the recovery cavity, the first pilot valve is movably connected with the valve sliding block, and the first pilot valve is used for controlling connection and disconnection between the compression cavity and the first channel. One end of the elastic element abuts against the first pilot valve, and the elastic element is used for providing pre-tightening force for separating the compression cavity and the first channel for the first pilot valve. According to the damping valve, the damping in the compression state can be changed through control of the elastic element and the first pilot valve, independent adjustment of the damping in the compression state is achieved, the damping adjustment performance of the damping valve is improved, and the application range of the damping valve is widened.
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Claims

1. A damping valve, characterized in that: Applied to a shock absorber, the shock absorber comprises a restoring chamber and a compression chamber, and the damping valve comprises: Valve seat assembly; A valve slider, wherein the valve slider and the valve seat assembly are arranged along a first direction, and a first channel is provided on the valve slider, wherein the first channel is suitable for communicating with the recovery chamber; a first pilot valve, the first pilot valve being movably connected to the valve slider, and the first pilot valve being used to control the on-off between the compression chamber and the first channel; An elastic element, one end of which is in contact with the first pilot valve, and the elastic element is used to provide a preload force to the first pilot valve to separate the compression chamber and the first channel.

2. The damping valve according to claim 1, characterized in that: Also includes: A second pilot valve, a second channel is also provided on the valve slider, the second channel is suitable for communicating with the compression chamber, and the second pilot valve is used to control the on-off between the first channel and the second channel.

3. The damping valve according to claim 2, characterized in that: The elastic element is disposed between the first pilot valve and the second pilot valve, and the other end of the elastic element abuts against the second pilot valve; When the second pilot valve is located at the first position, the first channel and the second channel are isolated, and when the second pilot valve is located at the second position, the first channel and the second channel are connected, and the elastic element is used to provide a preload force to move the second pilot valve from the first position to the second position.

4. The damping valve according to claim 2, characterized in that: The first pilot valve comprises a pilot valve core and a pilot valve seat, and the pilot valve core is movably connected to the pilot valve seat; The pilot valve seat is fixedly connected to the valve slider, and a valve port is arranged on the pilot valve seat; One end of the pilot valve core is connected to the elastic element, and the other end of the pilot valve core is suitable for abutting against the pilot valve seat to block the valve port so that the compression chamber and the first channel are isolated from each other. The other end of the pilot valve core is also suitable for isolating from the pilot valve seat to open the valve port so that the compression chamber and the first channel are connected.

5. The damping valve according to claim 1, characterized in that: The valve slider is suitable for reciprocating movement along the first direction; When the valve slider and the valve seat assembly are separated from each other, a third channel is formed between the valve slider and the valve seat assembly; when the valve slider abuts against the valve seat assembly, the third channel is closed; The recovery chamber and the compression chamber are adapted to communicate with each other through the third passage.

6. The damping valve according to claim 4, characterized in that: Also includes a drive mechanism; The driving mechanism is drivingly connected to the second pilot valve to adjust the pressure between the second pilot valve and the valve slide.

7. The damping valve according to claim 6, characterized in that: The driving mechanism includes a solenoid valve; When the solenoid valve is powered on, the second pilot valve is subjected to a downward pressure N1 in the direction of the first pilot valve. When the solenoid valve is powered off, the second pilot valve is subjected to a downward pressure N2 in the direction of the first pilot valve, and N1>N2.

8. The damping valve according to claim 7, characterized in that: The solenoid valve includes a moving iron core spring; The elastic element is a spring, the moving iron core spring and the elastic element are respectively used to provide preload forces in opposite directions along the first direction, and the elastic coefficient of the elastic element is smaller than the elastic coefficient of the moving iron core spring.

9. The damping valve according to claim 8, characterized in that: When the shock absorber is in a compressed state and the solenoid valve is powered off, the pilot valve core is suitable for maintaining an abutment state with the pilot valve seat to keep the valve port closed; when the shock absorber is in a compressed state and the solenoid valve reaches a preset pressure, the pilot valve core is suitable for separating from the pilot valve seat to open the valve port.

10. The damping valve according to claim 1, characterized in that: The valve seat assembly is provided with an overflow hole; The recovery chamber and the compression chamber are also connected to each other through the overflow hole.

11. The damping valve according to claim 3, characterized in that: The second pilot valve includes a second blocking portion; A through hole is provided on the valve slider, the elastic element is inserted into the through hole, the first channel and the second channel are connected through the through hole, and when the second pilot valve abuts against the valve slider, the second blocking portion is suitable for blocking one end of the through hole to isolate the first channel and the second channel from each other.

12. The damping valve according to claim 11, characterized in that: A diameter of the second blocking portion gradually decreases in a direction toward the first pilot valve.

13. The damping valve according to claim 12, characterized in that: The second pilot valve further includes a second connecting portion, which is disposed at an end of the second blocking portion close to the first pilot valve, and the second connecting portion is fixedly connected to one end of the elastic element.

14. The damping valve according to claim 4, characterized in that: The pilot valve core includes a first blocking portion and a first connecting portion; The first blocking portion is used to control the opening and closing of the valve port, and the first connecting portion is connected to the elastic element.

15. The damping valve according to claim 14, characterized in that: A diameter of the first blocking portion gradually decreases in a direction away from the second pilot valve.

16. A shock absorber, characterized in that: Comprising a damping valve as described in any one of claims 1-15.

17. A vibration reduction system, characterized in that: Comprising the damping valve according to any one of claims 1 to 15, and / or the shock absorber according to claim 16.

18. A vehicle, characterized in that: Comprising a vibration reduction system as claimed in claim 17.