Shock Absorber Valve Support Structure for Bending Durability
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Solution Overview
Problem
The durability of bendable plate-shaped valves in shock absorbers needs enhancement to improve performance and longevity.
Innovation Solution
A shock absorber design incorporating a bendable plate-shaped valve with a flexible member that is in contact with the valve and can bend together, featuring a support structure with a biasing part to manage the valve's movement and reduce excessive bending, enhancing durability and initial movement ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bendable plate-shaped valve is used to control fluid flow, then the shock absorber can achieve variable damping characteristics, but the durability of the valve is reduced due to excessive bending
Solution Approach 1:
The valve is divided into multiple sections: a bendable portion for flexible deformation, and support portions (first and second support parts) that provide structural stability. This segmentation allows the valve to bend when needed while being supported at critical locations to prevent excessive deformation and improve durability.
Solution Approach 2:
The biasing part is pre-installed to apply a biasing force to the second support part before operation. This preliminary action ensures that the valve is pre-positioned in an optimal state, reducing the magnitude of bending required during operation and thereby extending valve life.
2Reliability
If the valve is made more rigid to improve durability, then the valve can resist excessive bending, but the ease of initial movement and response is reduced
Solution Approach 1:
Different parts of the valve have different rigidity characteristics: the bendable portion is designed to be flexible for easy movement, while the support portions are designed to be more rigid for durability. This local differentiation of mechanical properties allows the valve to exhibit both ease of movement and durability in appropriate locations.
Solution Approach 2:
The valve transitions from a static rigid structure to a dynamic structure with controlled flexibility. The biasing part provides a dynamic biasing force that assists initial movement, while the support portions provide dynamic support during operation. This dynamic approach allows the valve to be easy to move when needed while maintaining durability.
3Reliability
If the biasing force is increased to improve valve control, then the valve response is enhanced, but the force required to actuate the valve increases
Solution Approach 1:
The biasing part acts as a counterweight or balancing mechanism, providing a biasing force that opposes the natural tendency of the valve to remain in its resting position. This biasing force assists the actuation process by reducing the net force required to move the valve, while still providing sufficient control authority when needed.
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
The design enhances the durability of the valve by reducing excessive bending and facilitating easier initial movement, while maintaining the ability to secure a volume of fluid, thus improving the shock absorber's performance and longevity.
Implementation Method 1
a biasing part at least a part of which is provided on a radially outer side of the second support part to bias the second support part side
Implementation Method 2
a flexible member in contact with the first support part and bendable together with the first valve
Data Source
AI summary
The shock absorber includes a cylinder sealing a working fluid, a piston slidably fitted in the cylinder and partitioning an inside of the cylinder into two chambers, a rod having a first end portion fastened to the piston and a second end portion protruding from the cylinder, a passage allowing communication between one chamber and another chamber in the cylinder, a bendable plate-shaped first valve having a first support part provided in the passage and supported at one surface on a radially inner side, a second support part disposed on a radially outer side relative to the first support part and supported at one surface, and a biasing part at least a part of which is provided on a radially outer side of the second support part to bias the second support part side, and a flexible member contacting the first support part and bendable together with the first valve.