Shock Absorber Damping Valve with Parallel Flow Passage
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Solution Overview
Problem
Conventional valves in shock absorbers face challenges in improving the durability of the leaf valve while maintaining sufficient liquid flow, as reducing the deflected amount of the leaf valve is limited by structural strength considerations.
Innovation Solution
The valve design incorporates a ring-shaped leaf valve with a first sub leaf valve and a first passage that opens parallel to the gap between the leaf valve and the opposing portion, allowing increased liquid flow without excessive deflection, and additional sub leaf valves to manage deflection and flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the length of the opposing portion in the axial direction is reduced to make the deflected amount of the leaf valve small, then the durability of the leaf valve is improved, but the structural strength becomes insufficient
Solution Approach 1:
The valve is segmented into multiple functional components: the leaf valve, the opposing portion, and multiple sub-leaf valves (first sub-leaf valve, second sub-leaf valve). This segmentation allows each component to have optimized dimensions for its specific function, enabling the opposing portion to maintain sufficient length for structural strength while the leaf valve achieves controlled deflection for durability
Solution Approach 2:
The invention introduces a new dimensional approach by adding sub-leaf valves that extend in the radial direction from the leaf valve. The first passage extends in parallel with the gap between the leaf valve and opposing portion, creating an additional flow dimension that compensates for reduced axial length of the opposing portion while maintaining structural integrity
2Reliability
If the deflected amount of the leaf valve is made small to improve durability, then the durability is improved, but the flow amount of liquid passing through the leaf valve is reduced
Solution Approach 1:
The flow path is segmented into multiple channels: the original gap between the leaf valve and opposing portion, and the first passage extending in parallel with this gap. The first sub-leaf valve controls the first passage, creating an additional flow path that compensates for reduced liquid flow through the main gap when deflection is minimized
Solution Approach 2:
The first sub-leaf valve acts as an intermediary component that controls flow through the first passage. This intermediary structure enables liquid to pass through an alternative path (the first passage) when the main gap flow is limited by small deflection, thereby maintaining sufficient overall flow amount while preserving leaf valve durability
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
This configuration enhances the durability of the leaf valve by minimizing deflection while ensuring adequate liquid flow, effectively addressing the limitations of conventional designs.
Implementation Method 1
the free end being allowed to be deflected toward both sides in the axial direction
Implementation Method 2
a first passage formed in the leaf valve so as to extend in parallel with the gap, the first passage being configured to be opened when the leaf valve is deflected in the direction away from the first sub leaf valve
Data Source
AI summary
A damping valve includes: a ring-shaped leaf valve having either one of an outer circumference and an inner circumference as a free end, the free end being allowed to be deflected toward both sides in the axial direction; a ring-shaped opposing portion that opposes the free end of the leaf valve with a gap; a first sub leaf valve stacked on one side of the leaf valve in the axial direction; and a first passage formed in the leaf valve so as to extend in parallel with the gap, the first passage being configured to be opened when the leaf valve is deflected in the direction away from the first sub leaf valve.