Vehicle Suspension Bush Axis Alignment for Reduced Friction
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Solution Overview
Problem
Vehicle suspension devices face challenges in preventing deformation of bush due to prying forces, which increases friction and affects ride comfort and handling stability, especially when the bush axis is inclined relative to the damper axis during various wheel stroke positions.
Innovation Solution
The suspension device configures the bush axis to be orthogonal to the damper axis at specific positions, ensuring the intersection angle remains close to a right angle across different wheel stroke positions, thereby reducing deformation and friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bush axis is arranged to be inclined relative to the direction perpendicular to the damper axis, then the damper can accommodate various wheel stroke positions, but deformation of the bush due to prying forces occurs
Solution Approach 1:
The invention makes the bush axis movable relative to the damper axis by providing a rotating mechanism that adjusts the bush axis orientation according to the wheel stroke position. This dynamic adjustment ensures the bush axis remains perpendicular to the damper axis throughout the stroke range, preventing deformation while accommodating various positions.
Solution Approach 2:
The invention changes the orientation parameter of the bush axis dynamically based on the wheel stroke position. By adjusting the angle between the bush axis and damper axis to maintain perpendicularity, the system prevents deformation while adapting to different stroke positions.
2Object-affected harmful factors
If the bush axis is disposed along the direction perpendicular to the damper axis, then deformation due to prying forces is prevented, but the damper cannot accommodate inclined configurations required by nearby components
Solution Approach 1:
The invention provides a dynamic adjustment mechanism that allows the bush axis to rotate and change its orientation relative to the damper axis. This enables the system to maintain perpendicularity (preventing deformation) while accommodating the inclined configurations required by nearby components through controlled rotation during wheel stroke.
Solution Approach 2:
The invention separates the functions of maintaining perpendicularity and accommodating inclination by providing a rotating mechanism that decouples the bush axis orientation from the damper axis orientation, allowing independent adjustment of each.
3Object-affected harmful factors
If the axis of the bush is kept perpendicular to the damper axis at all stroke positions, then prying forces are eliminated, but this requires complex adjustment mechanisms
Solution Approach 1:
The invention uses a simple rotating mechanism that passively maintains perpendicularity between the bush axis and damper axis throughout the wheel stroke range, eliminating the need for complex active adjustment mechanisms while still achieving the goal of preventing prying forces.
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 effectively reduces bush deformation and friction, enhancing ride comfort and handling stability by maintaining smooth damper operation across various wheel stroke states.
Implementation Method 1
a bush including a cylindrical elastic member fitted onto an outer circumference of the shaft and interposed between the shaft and the damper
Data Source
AI summary
A suspension device (rear suspension (10)) for vehicles is provided which includes a damper (40), a shaft (50) pivotably supporting an end of the damper (40), and a bush (60) including a cylindrical elastic member fitted onto the outer circumference of the shaft (50). The axis (C2) of the bush (60) is disposed along a line of intersection between an imaginary first plane (S1) and an imaginary second plane (S2), or along a line parallel to the line of intersection. The first plane (S1) is orthogonal to the axis (C1) of the damper (40) when a stroke position of a wheel (24) is a first position relative to the vehicle body (80) in the vertical direction of a vehicle body (80). The second plane (S2) is orthogonal to the axis (C1) of the damper (40) when the stroke position of the wheel (24) is a second position.