Leaf Spring Suspension With Integral Lug Axle Clamping
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Solution Overview
Problem
Existing leaf spring suspension systems for wheeled vehicles are complex, heavy, and prone to damage due to the use of clamping devices, which increase weight and assembly costs, and can lead to unsprung mass issues and creep in composite materials.
Innovation Solution
A leaf spring suspension system where lugs protrude from the leaf spring to securely clamp the axle, eliminating the need for additional clamping devices by providing a positive connection along the X-axis, reducing weight and complexity, and allowing for a lightweight design with reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If clamping devices are used to connect the leaf spring to the axle, then the connection strength is improved, but the device complexity and weight increase
Solution Approach 1:
The connection function is merged into the leaf spring itself by forming lugs integrally with the spring body. These lugs directly engage with the axle, eliminating the need for separate clamping devices while maintaining strong mechanical connection.
Solution Approach 2:
The clamping device is extracted/removed from the system entirely. Instead of adding separate clamping components, the leaf spring is designed with built-in lugs that perform the clamping function, simplifying the overall structure.
2Strength
If clamping devices are used to connect the leaf spring to the axle, then the connection strength is improved, but the weight increases
Solution Approach 1:
The clamping function is combined with the leaf spring structure itself. The lugs are formed as integral parts of the spring, eliminating separate heavy metal clamping components and reducing overall weight.
Solution Approach 2:
The lugs are strategically positioned and shaped to provide localized strengthening exactly where connection is needed, rather than requiring heavy reinforcement throughout the entire spring structure.
3Strength
If clamping devices are used to connect the leaf spring to the axle, then the connection strength is improved, but the assembly and maintenance complexity increases
Solution Approach 1:
The complex clamping device is removed from the system. The simplified lug-based connection requires fewer parts, fewer assembly steps, and less maintenance while providing adequate connection strength.
Data Source
AI summary
A suspension for a wheeled vehicle includes a leaf spring extending longitudinally relative to the vehicle and having first and second lugs protruding downward therefrom. The lugs are spaced from one another a length of the leaf spring to define a pocket therebetween. An axle passes perpendicularly beneath the leaf spring such that a portion of the axle is disposed in the pocket and is clamped between the lugs. The lugs may be fabricated integrally with the leaf spring.