Hollow 3D Cushioning Rubber for Low Reaction Force Compression
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Solution Overview
Problem
Existing cushioning rubbers with flat rubber designs face challenges in achieving a low reaction force characteristic while maintaining a large compression margin, especially when used with components of poor strength like sheet metal.
Innovation Solution
The cushioning rubber features a sheet-shaped design with a planar base portion and three-dimensional portions that rise from the base, incorporating hollow portions and adjustable side rising surfaces to manage reaction force. This design allows for a low reaction force characteristic even with a large compression margin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a cushioning rubber is made of flat rubber with a predetermined thickness, then it provides basic cushioning function, but it generates high reaction force that limits the compression margin when used with weak components like sheet metal
Solution Approach 1:
The cushioning rubber is divided into multiple three-dimensional portions (protruding portions) with hollow portions, each acting as an independent cushioning element. This segmentation allows the total cushioning function to be distributed across multiple elements, reducing the reaction force of each individual element while maintaining the overall cushioning capability.
Solution Approach 2:
The three-dimensional portions include hollow portions that create a porous or cavity-containing structure within the rubber material. This hollow structure reduces the effective material volume that generates reaction force, thereby lowering the overall reaction force characteristic while maintaining cushioning functionality.
2Adaptability or versatility
If the compression margin is increased to accommodate weak components, then the cushioning rubber must have lower reaction force characteristic, but this limits the ability to absorb vibration and shock effectively
Solution Approach 1:
By segmenting the cushioning rubber into multiple protruding portions, each with its own hollow portion, the patent enables a larger total compression margin to be achieved. Each segment can compress independently, allowing the overall structure to accommodate greater displacement without generating excessive reaction force from any single point.
Solution Approach 2:
The invention transitions from a flat, two-dimensional cushioning rubber to a three-dimensional structure with protruding portions having hollow portions. This dimensional change allows the cushioning rubber to utilize vertical space more effectively, providing additional compression capacity in the thickness direction while maintaining low reaction force characteristics.
3Strength
If a component with poor strength such as sheet metal is used, then the design must accommodate low strength materials, but this restricts the compression margin due to high reaction force from traditional cushioning rubber
Solution Approach 1:
The cushioning rubber applies local quality by creating specific hollow portions within the three-dimensional portions, concentrating the low reaction force characteristic in the areas where compression occurs. This allows the cushioning rubber to be specifically optimized for working with weak components like sheet metal while maintaining adequate cushioning performance.
Solution Approach 2:
The invention changes the physical parameters of the cushioning rubber by introducing hollow portions and three-dimensional structures, fundamentally altering the pressure-compression relationship. This parameter change enables the cushioning rubber to generate lower reaction forces at any given compression level, making it compatible with weak components that have limited compression margins.
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 cushioning rubber effectively stabilizes the repulsive force against loaded items by managing internal pressure through exhaust passages, ensuring a consistent and reduced reaction force across varying compression levels.
Implementation Method 1
The three-dimensional portion is integrally provided with a first rising surface continuous from the base portion, a top surface, a second rising surface on a side opposite to the first rising surface, and a pair of side rising surfaces on both sides in a sheet width direction, and the hollow portion opens only toward the other side in the sheet thickness direction
Data Source
AI summary
A sheet-shaped cushioning rubber including a planar base portion and a three-dimensional portion formed to rise from the base portion toward one side in a sheet thickness direction, the planar base portion and the three-dimensional portion being alternately provided in one direction of a sheet plane, wherein the three-dimensional portion includes a hollow portion that opens toward the other side in the sheet thickness direction. The three-dimensional portion is integrally provided with a first rising surface that is continuous from the base portion, a top surface, a second rising surface on a side opposite to the first rising surface, and a pair of rising surfaces on both sides in a sheet width direction, and the hollow portion opens only toward the other side in the sheet thickness direction.