Damping Stopper with Radial Constraint for Energy Absorption
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Solution Overview
Problem
Existing damping stoppers face challenges in increasing absorbable energy amount without enlarging size due to design space limitations and sharp rise in reaction force upon elastic body deformation.
Innovation Solution
Incorporating a second member with higher rigidity attached to the outer periphery of the elastic body, restricting its expansion and generating resistance, thereby controlling the rise in reaction force and enhancing energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elastic body is allowed to expand radially outward freely, then the reaction force rises sharply, but the displacement amount decreases and energy absorption is inefficient
Solution Approach 1:
The second member is attached to the elastic body in advance to restrict its radial expansion. This preliminary constraint modifies the deformation characteristics of the elastic body, causing the reaction force to increase gradually rather than sharply, thereby extending the displacement amount and improving energy absorption efficiency
Solution Approach 2:
By attaching the second member to the elastic body, the physical parameters of the system are changed. The elastic body's radial expansion is restricted, which alters the force-displacement relationship from a sharp rise to a gradual increase, enabling more efficient energy absorption over a longer displacement range
2Power
If the stopper size is increased to achieve proper distortion and high reaction force, then the energy absorption capability improves, but the device complexity and space requirements increase
Solution Approach 1:
Instead of uniformly increasing the entire stopper size, the second member is attached only to specific regions of the elastic body to restrict radial expansion locally. This localized modification achieves the desired gradual force increase and improved energy absorption without proportionally increasing the overall device size
Solution Approach 2:
The damping stopper combines the elastic body with the second member to create a composite structure. This composite design leverages the elastic properties of the elastic body and the constraining properties of the second member, achieving enhanced energy absorption capability without simply scaling up the original component sizes
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 second member restricts radial expansion, allowing for a gradual increase in reaction force, increasing the displacement amount before reaching maximum force, thus enhancing energy absorption efficiency.
Implementation Method 1
the elastic body 82 containing a rubber material... configured to be axially compressed by the two members and expand radially outward... absorbing the kinetic energy by the weight and the speed of a movable object
Implementation Method 2
a second member attached to an outer periphery of the elastic body in one axial region of the elastic body and restricting the expansion of the elastic body in the one region... a resistance force by the second member is generated in an expansion process of the elastic body
Data Source
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AI summary
The disclosure provides a damping stopper interposed between two members axially displaced relative to each other and is provided with an elastic body which, when the interval between the two members decreases, is axially compressed by the two members and expands radially outward. In the elastic body, a second member suppressing the expansion is located in one axial region and attached to the outer periphery. When axially compressed by the two members, the elastic body expands while receiving resistance by the second member. The expanding elastic body contacts the side wall of one of the two members.