Shock Absorber Damping Valve with Adjustable Prestress
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Solution Overview
Problem
Existing damping valves for shock absorbers lack separate adjustability of force/speed behavior between the traction and pressure stages due to the predefined opening behavior of valve spring discs, which is determined by their elastic deflection and edge support interactions.
Innovation Solution
A damping valve design featuring a base body with first and second support bodies and valve spring discs supported via inner and outer edge supports, utilizing a stroke movable control body to adjust the prestress and thereby the opening behavior of the valve spring discs, allowing separate control of the traction and pressure stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If valve spring discs are used to control damping fluid passage, then the damping valve can separate damping fluid spaces and control fluid flow, but the force/speed behavior cannot be separately adjusted between traction and pressure stages
Solution Approach 1:
The damping valve is divided into two separate support bodies (first support body and second support body) that independently support the valve spring discs from opposite sides. This segmentation allows independent adjustment of prestress forces on each side, enabling separate control of force/speed behavior in traction and pressure stages without increasing overall device complexity
Solution Approach 2:
Each support body provides localized prestress to the valve spring discs at different positions. The first support body applies prestress from one direction while the second support body applies prestress from the opposite direction, creating different local force conditions that enable separate adjustment of damping characteristics for traction and pressure stages
2Stability of the object's composition
If valve spring discs are strongly prestressed, then the valve structure is more rigid and stable, but the valve spring discs lift-off from edge support to a lesser degree, reducing damping adjustability
Solution Approach 1:
The second support body provides a counterbalancing prestress force from the opposite side to the valve spring discs. This counterweight effect allows the valve structure to maintain high stability through strong prestressing while still enabling adequate lift-off behavior, because the opposing prestress from the second support body compensates for the reduced lift-off tendency
Solution Approach 2:
The independent prestress adjustment on each side of the valve spring discs allows separate optimization of parameters. One side can be strongly prestressed for structural stability while the other side is adjusted to provide the necessary lift-off characteristics for damping control, achieving both stability and adaptability simultaneously
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables independent adjustment of the force/speed behavior in both stages by altering the prestress of the control body, allowing for distinct damping effects in each direction, enhancing the flexibility and performance of the shock absorber.
Implementation Method 1
the valve spring discs lift-off either from the inner edge support or from the outer edge support, by elastic deflection
Data Source
AI summary
The present invention relates to a damping valve for a shock absorber, comprising a base body with a first support body and with a second support body and comprising one or more valve spring discs which separate a first damping fluid space from a second damping fluid space, wherein the valve spring discs are supported against the first support body via an inner edge support, and against the second support body via an outer edge support, and which control a passage of damping fluid in both directions by virtue of the fact that the valve spring discs lift-off either from the inner edge support or from the outer edge support, by elastic deflection. According to the invention, a stroke movable control body is provided which is prestressed against the valve spring discs, so that the control behaviour of the valve spring discs can be adjusted via the edge supports by the prestress of the control body.