Suspension Tower Bracket Layout for Stress-Resistant Rigidity
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Solution Overview
Problem
The existing suspension tower structures for supporting components like wire harnesses through brackets tend to concentrate stress, leading to reduced rigidity and potential deformation under load, especially in vehicles with large wheels, and traditional reinforcement methods increase weight and cost.
Innovation Solution
A suspension tower design with curved side walls and strategically positioned mounting portions for brackets, where the brackets straddle a virtual line intersecting the side wall and damper axis, reducing stress concentration and acting as a reinforcement, without the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mounting portions are formed by curving (bulging) a portion of the sus-tower to support wire harnesses through brackets, then the wire harness can be mounted to the sus-tower, but stress concentrates at the mounting portion causing reduced rigidity and potential deformation of the sus-tower
Solution Approach 1:
A reinforcement member is introduced as an intermediary component between the mounting portion and the main sus-tower structure. This reinforcement member absorbs and distributes the stress generated by the mounted wire harness, preventing stress concentration from directly affecting the sus-tower's rigidity while still enabling the mounting function
2Strength
If a reinforcement member is added to strengthen the sus-tower, then the rigidity of the sus-tower is improved, but the weight and cost increase due to additional components
Solution Approach 1:
Instead of uniformly reinforcing the entire sus-tower structure, the reinforcement member is strategically placed only at the specific mounting portion where stress concentration occurs. This localized reinforcement approach provides the necessary strength improvement while minimizing the additional weight and material cost
Data Source
AI summary
A rigid suspension tower structure includes a sus-tower for supporting a damper, and a bracket for mounting a component to be secured to the sus-tower. The sus-tower includes a curved side wall portion joined to a front side frame of a vehicle body and extending upward, and a top portion supporting the upper end of the damper. The side wall portion has a pair of mounting portions made of bulging portions. The mounting portions are formed on mutually different sides in a vehicle front-rear direction with a virtual line interposed therebetween, the line being formed by intersecting the side wall portion and a plane that extends parallel to a vehicle width direction and passes through the central axis of the damper. The bracket straddles the line and is secured to the mounting portions.