Damper valve device for a shock absorber

By using a U-shaped valve element and embossing process to form connection openings and grooves on the damper valve seat, combined with a support ring and a return spring, the problems of valve seat manufacturing complexity and high cost are solved, achieving simplified manufacturing and effective pressure control.

CN114941679BActive Publication Date: 2026-07-17ZF FRIEDRICHSHAFEN AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZF FRIEDRICHSHAFEN AG
Filing Date
2022-02-14
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing shock absorber valve seats are complex and costly to manufacture, especially when manufacturing small connection openings and annular grooves, which are prone to burrs, and the multi-part structure increases the jointing cost.

Method used

A valve element with a U-shaped cross-section is placed on the valve seat cover side. The pressure chamber is defined by the radial outer and inner sides, and the connecting opening and groove are formed by a simple embossing process. The support ring can be elastically constructed to control the pressure distribution. The return spring is used to reset the valve element. The gear profile divides the pressure chamber to control the widening movement.

Benefits of technology

It simplifies the valve seat manufacturing process, reduces manufacturing costs, improves the manufacturability and reliability of the valve seat, and enables effective control of the pressure chamber and adjustment of the damping force.

✦ Generated by Eureka AI based on patent content.

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    Figure CN114941679B_ABST
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Abstract

The invention relates to a damping valve device for a shock absorber, comprising a valve element of variable diameter, which, starting from a passage position, assumes a throttling position by a radial closing movement towards a flow guide surface depending on the flow speed of the damping medium inside the throttling site, wherein the valve element and the valve seat define a pressure chamber, characterized in that the valve element has a U-shaped cross section and is seated on the cover side of the valve seat, wherein the radially outer side of the valve seat and the inner side of the valve element define the pressure chamber.
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