Elliptical Coned Disc Spring Asymmetric Width Rectangular Space
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Solution Overview
Problem
Coned disc springs used as pressing or shock absorbing means face challenges in accommodating rectangular installation spaces, leading to increased parts and production costs, and stress differences between bending parts at long and short radial sides, limiting their application range.
Innovation Solution
An elliptical coned disc spring with a disc-shaped body and an elliptical outer circumference, where the plate width of the long radial part is greater than that of the short radial part, allowing for non-linear load characteristics and reduced stress differences between bending parts, enabling accommodation in rectangular spaces and improved stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a circular coned disc spring is used in a rectangular installation space, then the circular shape provides uniform stress distribution, but dead space is formed on the long sides and multiple springs are required
Solution Approach 1:
The patent applies asymmetry by changing the spring shape from circular to elliptical, where the major axis aligns with the long side of the rectangular installation space. This asymmetric adaptation eliminates dead space on the long sides while maintaining structural integrity and load-bearing capability.
2Area of stationary object
If the outer circumference is changed to an ellipse to fit rectangular space, then installation space utilization improves, but stress differences between bending parts at long and short radial sides increase
Solution Approach 1:
The patent applies local quality by making the plate width variable rather than uniform. Specifically, the plate width at the long radial part is made greater than at the short radial part, creating local structural differences that compensate for the stress concentration at the long radial bending part, thereby achieving more uniform stress distribution across the elliptical structure.
3Stress or pressure
If plate width at long radial part is increased to reduce stress differences, then stress distribution uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the plate width parameter along the elliptical circumference. The plate width is set to be greater at the long radial part and smaller at the short radial part, with specific dimensional relationships defined to achieve stress uniformity while maintaining manufacturability through controlled geometric progression.
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 elliptical coned disc spring achieves non-linear load characteristics, reduces stress differences between bending parts, and can be efficiently used in various applications, including semiconductor elements and clutch mechanisms, while minimizing part count and production costs.
Implementation Method 1
A coned disc spring has a body in a disc shape (approximately conical shape)... the coned disc spring can be used in various applications, such as, as a pressing means, a shock absorbing means
Data Source
AI summary
An elliptical coned disc spring can be accommodated in a rectangular installation space, can yield non-linear load characteristics, and can reduce stress differences between a bending part at a long radial part side and a bending part at a short radial part side. An elliptical coned disc spring has a body in which an outer circumference is an ellipse in a disc shape. A hole is formed at the center of the body. The hole may have various shapes such as a circle, an ellipse, etc. The body has a long radial part 111 and a short radial part. A plate width of the long radial part is set to be greater than a plate width of the short radial part (that is, a>b).