Automobile Vehicle Body Structure with Triangular Bracket
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Solution Overview
Problem
The existing automobile vehicle body structures have insufficient support rigidity for the subframe, leading to decreased steering stability due to inadequate reinforcement of the bolt fastening portion.
Innovation Solution
The vehicle body structure incorporates a triangular-shaped attachment bracket on the rear section of the front side frame, connected to an outrigger with a two-part construction that projects forward from the dashboard panel, including a collar, reinforcement plate, and nut configuration, which enhances the rigidity and support of the subframe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bracket is connected to the extension member with an upward-facing flange and an outrigger is connected to the bracket, then the bolt fastening portion can be reinforced, but the support rigidity of the suspension member becomes insufficient and steering stability decreases
Solution Approach 1:
The outrigger is extended in the vehicle width direction (horizontal dimension) rather than only in the vertical dimension. This lateral extension creates a wider base of support, forming a more stable triangular configuration with the front side frame and subframe, thereby improving steering stability while maintaining bolt fastening reinforcement
Solution Approach 2:
The outrigger is configured with a curved upper surface that arches upward from the front wall toward the rear wall. This curvature optimizes the distribution of collision loads and enhances the structural rigidity of the outrigger, allowing it to effectively reinforce the bolt fastening portion while maintaining overall steering stability
2Device complexity
If the outrigger is connected only to the attachment bracket, then the structure is simpler, but the support rigidity of the subframe is insufficient
Solution Approach 1:
The outrigger is integrated with both the attachment bracket and the front side frame, creating a merged structural system. This combination allows the outrigger to simultaneously reinforce the bolt fastening portion through the bracket and provide additional support to the subframe through its connection to the front side frame, thereby improving subframe support rigidity without significantly increasing complexity
Data Source
AI summary
A rear section upper face of a front side frame is connected to a front face of an inclined wall of a dashboard panel. An attachment bracket that is provided to a rear section lower face of the front side frame and that has a triangular shape in side view supports a support of a subframe. An outrigger is provided that has a vehicle width direction inner end connected to a front wall and a lower wall of the attachment bracket and to a vehicle width direction outer wall of the front side frame, and that has a vehicle width direction outer end connected to a front end of a side sill.