Vibration Damping Support Apparatus Shear Deformation Control
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Solution Overview
Problem
Existing vibration damping support mechanisms, such as torque rods, experience a sudden increase in rigidity and dynamic spring constant due to increased displacement, leading to insufficient vibration and impact load blocking between the power unit and vehicle body in the roll direction.
Innovation Solution
A vibration damping support apparatus with a stopper member and stopper elastic body, where the load transmission surfaces and load bearing surfaces are formed to intersect with the load input direction, ensuring a primary shear deformation component and a secondary compressive and tensile deformation component, preventing a sharp increase in rigidity and spring constant even under high loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the stopper elastic body is formed within a circular cone trapezoidal shaped space, then the air within the second air chamber acts as an air spring and suppresses sudden increase in deformation resistance, but the proportion of compression deformation component increases as displacement amount increases, causing sudden increase in rigidity and dynamic spring constant
Solution Approach 1:
The patent changes the geometric parameters of the stopper elastic body by forming it within a cylindrical space instead of a circular cone trapezoidal space. This parameter change modifies the deformation characteristics, maintaining a higher proportion of shear deformation components even at large displacement amounts, thereby preventing sudden increase in rigidity and dynamic spring constant while preserving vibration blocking ability.
2Adaptability or versatility
If the stopper elastic body undergoes large displacement, then it can accommodate high load input, but the rigidity and dynamic spring constant suddenly increase, reducing the ability to block impact load and vibration
Solution Approach 1:
The patent modifies the geometric parameters by using a cylindrical space configuration for the stopper elastic body, which changes the stress distribution and deformation mode. This allows the stopper elastic body to undergo large displacements while maintaining consistent rigidity characteristics and preventing sudden increases in dynamic spring constant, thereby preserving vibration blocking ability across the full range of motion.
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
Effectively suppresses the sharp increase in rigidity and dynamic spring constant, maintaining effective vibration and impact load blocking capabilities even with large displacement amounts.
Implementation Method 1
a stopper elastic body, manufactured from rubber, bonded to each of the respective load transmission surfaces and the load bearing surfaces, and elastically connecting the stopper member and the second mounting member to each other
Implementation Method 2
when elastic deformation occurs in the stopper elastic body this elastic deformation includes both a shear deformation component and a compression deformation component
Implementation Method 3
compressing the air in the second air chamber. When this occurs, since the stopper elastic body is formed within the circular cone trapezoidal shaped space, elastic deformation (compression and shear deformation) occurs including both a deformation component along the shear direction (shear deformation component) and a component along the compression direction (compression deformation component), with the air within the second air chamber acting as an air spring
Data Source
AI summary
A first load transmission surface 54 and a second load transmission surface 56 are each formed as a flat surface extending parallel to a load input direction. Therefore, elastic deformation occurring in each of an outer body part 66 and an inner body part 68 in a stopper elastic body 64 includes a main component of a shear deformation component, and a secondary component of a compressive and tensile deformation component that is small relative to the shear deformation component. Consequently, a sharp increase in deformation resistance and dynamic spring constant when a high load is input can be effectively suppressed.