Shock Absorber Passage Structure for Frequency-Sensitive Damping
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Solution Overview
Problem
There is a demand for simplifying the structure of shock absorbers, particularly in making them frequency-sensitive while maintaining effective damping force characteristics.
Innovation Solution
A shock absorber design featuring a piston within a cylinder with a damping valve and an elastic member, where the elastic member includes a seal part to suppress fluid flow and a pressure receiving part to adjust pressure, allowing for variable damping force based on frequency through a frequency-sensitive mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frequency sensitive mechanism is added to achieve variable damping force, then damping performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the frequency sensitive mechanism with the existing damping valve structure. The elastic member is integrated into the valve assembly, and the pilot chamber is formed within the valve body, combining multiple functions into a unified structure that achieves frequency sensitivity without adding separate complex subsystems
Solution Approach 2:
The damping valve is designed to serve multiple functions: it provides the primary damping function while also housing the frequency sensitive mechanism. The pilot case and seal chamber are integrated into the valve structure, allowing a single component to perform both damping control and frequency-sensitive pressure regulation
2Ease of operation
If multiple passages and chambers are added for frequency sensitivity, then damping control is improved, but device complexity increases
Solution Approach 1:
The patent implements a nested arrangement where the seal chamber is positioned within the pilot case, and the elastic member is housed within the seal chamber. This nested structure allows multiple functional chambers to coexist in a compact configuration, reducing overall structural complexity while maintaining the required passage network for frequency sensitivity
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 simplified structure achieves variable damping force in response to frequency, enhancing ride comfort and stability by adjusting fluid flow and pressure, thus improving the shock absorber's performance without increasing complexity.
Implementation Method 1
an elastic member having rubber elasticity provided in the passage part. The elastic member includes a seal part configured to suppress a flow of the working fluid from the second passage to the third passage, and a pressure receiving part configured to receive a pressure of the second passage
Data Source
AI summary
The shock absorber includes a piston fitted in a cylinder and partitioning an inside of the cylinder, a first passage through which a working fluid in the cylinder flows due to movement of the piston, a damping valve provided in the first passage and configured to change a flow path area due to a flow of the working fluid, a second passage communicating with an upstream side of the damping valve via a throttle, a third passage communicating with a downstream side of the damping valve, a passage part provided between the second passage and the third passage, and an elastic member having rubber elasticity provided in the passage part. The elastic member includes a seal part configured to suppress a flow of the working fluid from the second passage to the third passage, and a pressure receiving part configured to receive a pressure of the second passage.