Shock Absorber Valve Guide Surface for Flow and Durability
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Solution Overview
Problem
Conventional shock absorber valves face durability and assemblability issues due to the need for large deflection to increase liquid flow, leading to stress on the valve body and potential assembly problems with tapered or flat surfaces.
Innovation Solution
A valve design featuring an annular valve body with a guide surface inclined away from the opposing surface, allowing increased liquid flow with minimal deflection and improving durability, while guide surfaces facilitate assembly by preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the length of the opposing surface in the axial direction is reduced to allow increased liquid flow with small deflection, then the durability of the valve body is improved, but the gap between the free end and the tapered surface cannot be increased sufficiently at small deflection stages
Solution Approach 1:
The patent transitions from a one-dimensional axial opposing surface to a two-dimensional guide surface that extends in the radial direction. This guide surface is positioned at an angle to the axial direction, allowing the liquid flow path to be increased in the radial dimension rather than requiring a longer axial opposing surface. This enables sufficient gap increase at small deflection stages while maintaining a compact axial length, thereby improving valve body durability without compromising liquid flow amount.
2Ease of manufacture
If a tapered surface is used to guide the valve body, then the assemblability is improved, but the valve body may be stucked over the tapered surface during assembly
Solution Approach 1:
The patent modifies the geometric parameters of the guide surface, specifically controlling its inclination angle relative to the axial direction. By optimizing this angle, the guide surface provides sufficient guidance for proper valve body alignment during assembly while preventing the valve body from being stuck. The parameter optimization balances the guidance function with smooth passage, resolving the contradiction between assemblability and assembly process smoothness.
3Quantity of substance
If the valve body is deflected largely to increase liquid flow, then the flow amount is increased, but the stress caused in the valve body is increased and durability is deteriorated
Solution Approach 1:
The patent introduces a guide surface that extends in the radial direction at an angle to the axial direction. This creates an additional dimension for increasing the liquid flow path length without requiring large axial deflection of the valve body. The liquid can flow along the inclined guide surface, effectively increasing the flow path and flow amount while keeping the valve body deflection small, thereby reducing stress and improving durability.
Data Source
AI summary
A valve includes: a valve case; and an annular valve body, one of the inner circumference end and the outer circumference end of the valve body being formed as the free end capable of moving towards both sides in the axial direction with respect to the valve case. The valve case has the annular opposing surface capable of opposing to the free end so as to form the gap therebetween, and the guide surface that is positioned on one side of the opposing surface in the axial direction, the guide surface being continuous with the part of the opposing surface in the circumferential direction. The guide surface is inclined in the direction away from the valve body as the distance from the opposing surface is increased.