Elastic Lower Spring Seat Mounting for Vehicle Suspension
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Solution Overview
Problem
Conventional vehicle suspension systems experience reduced strength and durability at the mounting points of the lower spring seat due to concentrated loads from relative displacement between the coil spring and the lower link during suspension strokes, leading to potential disconnection and stress concentration.
Innovation Solution
A lower spring seat mounting structure with an elastic seat and a hook portion arranged at an angle of ±45 degrees relative to the lower link's axis, allowing for lateral displacement and distributing loads to enhance strength and durability by reducing stress concentration at the connecting points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lower spring seat is fixedly mounted at multiple mounting portions on the lower link to prevent displacement, then the spring seat is securely fixed, but the load is concentrated on the mounting portions causing deterioration of strength and durability
Solution Approach 1:
The lower spring seat is divided into multiple mounting portions (first, second, third, and fourth mounting portions) arranged around its circumference. By distributing the mounting points segmentally around the spring seat, the load that would otherwise concentrate on single points is spread across multiple locations, preventing localized stress concentration and improving the durability of each individual mounting portion while maintaining secure fixation.
2Stability of the object's composition
If the lower spring seat is fixedly mounted to prevent displacement during suspension stroke, then the mounting is secure, but the mounting portions suffer from large tensile loads upon every suspension stroke
Solution Approach 1:
The lower spring seat is divided into multiple mounting portions (first, second, third, and fourth mounting portions) arranged around its circumference. By distributing the mounting points segmentally around the spring seat, the load that would otherwise concentrate on single points is spread across multiple locations, preventing localized stress concentration and improving the durability of each individual mounting portion while maintaining secure fixation.
Solution Approach 2:
Each mounting portion is equipped with individual fastening means (such as bolts or rivets) that can independently bear and distribute the tensile loads generated during suspension stroke. This local quality approach ensures that each mounting portion is optimized for its specific load-bearing function, allowing the spring seat to remain stable while distributing the force burden across multiple localized attachment points.
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 structure effectively reduces stress concentration and enhances the strength and durability of the connecting points between the lower spring seat and the lower link, preventing disconnection and maintaining a secure mounting state during suspension strokes.
Implementation Method 1
an elastic lower spring seat including one side surface that is in contact with the spring mounting portion and the other side surface that is in contact with the lower end portion of the coil spring
Data Source
AI summary
A lower spring seat mounting structure in a suspension of a vehicle, including a spring mounting portion to which a lower end portion of a coil spring is mounted, the spring mounting portion being disposed on a lower link, an elastic lower spring seat including one side surface that is in contact with the spring mounting portion and the other side surface that is in contact with the lower end portion of the coil spring, and a seat mounting portion at which the lower spring seat is connected to the spring mounting portion. The seat mounting portion is arranged within a range defined between two straight lines which extend through a center of the lower spring seat and form an angle of ±45 degrees with respect to an axis of the lower link in a plan view.