Coaxial Opposite-Winding Spring Structure for Suspension
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Solution Overview
Problem
Conventional suspension springs experience excessive friction and torsional forces due to twisting displacement at their ends during expansion and shrinkage, affecting the performance of dampers and suspension systems.
Innovation Solution
A spring structure comprising two compression coil springs with different winding directions, where one end of each spring is supported on a base and the other end abuts on a spring seat, allowing the springs to rotate in the same direction during expansion and shrinkage, thereby releasing torsional forces and preventing discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two compression coil springs with the same winding direction are arranged in series, then the spring structure can provide suspension function, but the ends of the spring experience twisting displacement and torsional force during expansion and shrinkage
Solution Approach 1:
The patent applies asymmetry by using two compression coil springs with opposite winding directions (one clockwise, one counterclockwise). This asymmetric configuration in terms of winding direction causes the springs to rotate in opposite directions during compression and extension, which counterbalances the torsional forces and prevents twisting displacement at the spring ends, thereby eliminating the harmful friction and torsional effects.
2Object-generated harmful factors
If the spring ends are fixed to prevent twisting, then torsional force is reduced, but the spring structure becomes more complex and performance is degraded
Solution Approach 1:
The patent converts the harmful torsional force into a beneficial effect by designing the springs to rotate freely during operation. The opposite winding directions cause the springs to generate counterbalancing rotational forces, transforming what would be harmful twisting and friction into a self-canceling mechanism that actually improves performance without requiring additional constraint structures.
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 enhances the performance of the spring structure by evenly distributing forces and maintaining the springs in a straight state, reducing friction and torsional issues, and improving the overall functionality of suspension systems.
Implementation Method 1
two compression coil springs different in winding directions, in which one end portions of the two compression coil springs are respectively supported on the base and the moving section
Implementation Method 2
both ends of the suspension spring are displaced in a twisting direction and receive a torsional force. Consequently, an excess frictional force may be generated at a contacting portion
Data Source
AI summary
A spring structure includes a clockwise spring and a counterclockwise spring that are coaxially arranged under a state in which a spring seat is interposed between a lower end portion of the clockwise spring and an upper end portion of the counterclockwise spring. An upper end portion of the clockwise spring is supported on an upper spring seat portion, and a lower end portion of the counterclockwise spring is supported on a lower spring seat portion.