Lower Arm Suspension Structure Without Shock Absorbers
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Solution Overview
Problem
Conventional shock absorbers in vehicle suspension systems require numerous parts, including rubber bushes that are prone to wear and tear, leading to increased weight, complexity, and reduced space efficiency, while also increasing manufacturing costs.
Innovation Solution
A suspension device design that eliminates the shock absorber by using a lower arm connected to a wheel carrier, a frame part, and a restraint part with a rotational center axis, guided by a guide hole and restrained by a shaft part, reducing the need for rubber bushes and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shock absorbers are installed in the suspension system, then vibration absorption function is provided, but device complexity increases due to numerous parts such as washers and bushes
Solution Approach 1:
The patent extracts and eliminates the shock absorber component from the suspension system by integrating its vibration absorption function into the lower arm structure itself. The lower arm is designed with a specific geometric configuration that provides inherent vibration absorption capabilities without requiring separate shock absorber components, washers, or bushes.
Solution Approach 2:
The patent merges the shock absorption function with the lower arm structural component. The lower arm is designed to perform both its structural support function and vibration absorption function simultaneously, combining multiple functions into a single integrated component rather than using separate parts.
2Reliability
If conventional shock absorbers with rubber bushes are used, then vibration damping is achieved, but weight of the vehicle increases
Solution Approach 1:
The patent removes the rubber bushes and shock absorber components that contribute to vehicle weight, retaining only the essential lower arm structure with optimized geometry that provides sufficient vibration damping through its structural design rather than through separate damping components.
Solution Approach 2:
The patent changes the design parameters of the lower arm, specifically optimizing its geometric configuration and material distribution to achieve vibration damping through structural parameters rather than through separate damping materials, thereby reducing overall weight.
3Reliability
If shock absorbers with multiple mounting parts are installed, then suspension function is provided, but manufacturing cost increases
Solution Approach 1:
The patent eliminates the need for separate shock absorber components and their associated mounting hardware (washers, bushes, fasteners), reducing the number of parts that require manufacturing, inventory management, and assembly, thereby reducing overall manufacturing cost.
Solution Approach 2:
The patent combines the shock absorption function with the lower arm structure, reducing the total part count and simplifying the manufacturing process. Fewer discrete components mean fewer manufacturing operations, less inventory complexity, and reduced assembly requirements.
4Reliability
If conventional shock absorbers are mounted between vehicle body and wheel, then ride comfort is improved, but space between internal vehicle parts is reduced
Solution Approach 1:
The patent removes the shock absorber component that occupies space between the vehicle body and wheel assembly, achieving ride comfort through the optimized lower arm structure instead, thereby freeing up internal space for other vehicle components.
Data Source
AI summary
A suspension device includes a lower arm connected to a wheel carrier to be rotatable up and down according to movement of the wheel carrier, a frame part connected to the lower arm to receive the movement of the wheel carrier, and a restraint part disposed on the frame part to restrain a rotation range of the lower arm.