A two-stage damping continuous regulating valve for a shock absorber

Abstract

The invention provides a two-stage damping continuous regulating valve for a shock absorber, comprising a damping regulating unit, a regulating valve base and an encapsulated valve assembly; the regulating valve seat is mounted on a piston valve of a shock absorber, and the regulating valve seat is on the There are several damping holes, a movable damping adjusting unit is installed on the regulating valve base, and the damping adjusting unit is provided with damping holes corresponding to the regulating valve base, and the main spool of the package valve assembly moves up and down , so that the damping hole of the damping adjustment unit and the damping hole of the regulating valve base are partially or completely connected. The present invention realizes the continuous adjustment of the damping force by adjusting the flow area of ​​the first-stage damping and the second-stage damping respectively, greatly expands the damping adjustment range of the shock absorber or the damping valve, and has active control and stepless damping. Adjustable, smooth damping adjustment process, fast dynamic response and simple structure.

Description

technical field [0001] The invention relates to the technical field of vibration reduction of automobile suspension systems, in particular to a two-stage damping continuous regulating valve for a shock absorber. Background technique [0002] As an important part of the automobile suspension system, the shock absorber converts the body vibration energy generated by the road surface uneven excitation into heat and dissipates it into the atmospheric environment, so as to attenuate the body vibration. The traditional non-adjustable damping shock absorber has been unable to meet people's needs. The adjustable damping shock absorber can switch the damping according to the working conditions, and can improve the comprehensive performance of the vehicle, which is one of the future development directions. [0003] Chinese Patent Publication No. CN109027100A discloses an oil shock absorber with variable damping characteristics by changing the flow rate of the normal through hole. A gr...

AI Technical Summary

Problems solved by technology

This design realizes the adjustment of the damping force to a certain extent, but the adjustment of the damping force will be passively affected by the impact of the road surface. The severe impact on the body cannot truly achieve the buffering and vibration reduction effect

The Chinese Patent Publication No. CN111365402B has invented a magneto-rheological fluid two-way damping regulating valve, which uses a magnetic field to control the viscosity of the magneto-rheological fluid to adjust the resistance of the valve core when moving, and then adjusts the two damping ports through the slider. The flow area realizes the adjustment of two kinds of damping force. This design enriches the diversity of damping force adjustment to a certain extent and realizes the damping stepless adjustment. However, this design has many things to be improved: First, in a After the use time, the magnetorheological fluid will volatilize or the magnetic particles will precipitate, making the viscosity distribution of the magnetorheological fluid extremely uneven, so the movement of the valve core is easily affected by the viscosity of the magnetorheological fluid and the working pressure of the external oil chamber. This phenomenon will lead to the unstable opening state of the damping valve port, and the damping adjustment valve port of the shock absorber is prone to "sudden opening and closing" phenomenon; second, the magneto-rheological fluid as the regulating medium After the shock absorber or damping valve is placed for a long time, the original magnetic field effect of the base fluid will not be eliminated immediately after the power is cut off or the current is changed, and the response characteristics of the shock absorber or damping valve will further deteriorate; thirdly, the Although the invention proposes two damping adjustment methods, the two damping adjustment methods cannot achieve active adjustment. The manual adjustment part is only used for pre-adjustment, and secondary adjustment cannot be performed after the shock absorber is sealed and sealed. Both adjustment methods cannot produce linkage adjustment effects; Fourth, the damping adjustment method proposed by the invention does not really improve the damping adjustment range of the shock absorber or damping valve, and its actual damping adjustment range is limited by the two damping adjustment methods. The limit of the smaller side of the damping adjustment range

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