Vehicle Seat Connection Bar Mounting for Oblique Collision Loads
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Solution Overview
Problem
Existing vehicle seat connection bar structures are inadequate in resisting large bending moments or torsional moments during oblique or offset collisions, leading to potential separation of the connection bar.
Innovation Solution
A connection bar mounting structure featuring link members with reduced bending rigidity sections and a connection bar fixed to the link members, which is supported by side frames and vehicle members, enhancing the structure's resistance to bending and torsional forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the connection bar is integrally attached at connecting portions to the link members and cushion frames, then the structure has high resistance to impact force in head-on collision, but the structure has insufficient resistance to large bending moment or torsional moment in oblique or offset collision
Solution Approach 1:
The link member is segmented into multiple sections with different bending rigidities: a first bending rigidity reduced section between the middle part and first fixation part, and a second bending rigidity reduced section between the middle part and second fixation part. These sections have bending rigidity smaller than those of the middle part and fixation parts, creating a hierarchical structure that manages stress distribution during collisions.
Solution Approach 2:
Different sections of the link member are designed with different bending rigidities to perform different functions. The middle part and fixation parts maintain high bending rigidity for structural strength, while the intermediate sections have reduced bending rigidity to absorb bending moments and torsional moments, allowing the structure to adapt to various collision scenarios.
2Strength
If the connection bar is made with high rigidity to prevent separation, then the structure resists impact well, but the structure cannot effectively absorb bending and torsional forces during oblique collisions
Solution Approach 1:
The bending rigidity parameter is changed across different sections of the link member. The first and second bending rigidity reduced sections have deliberately lowered bending rigidity compared to the middle part and fixation parts. This parameter variation allows the structure to absorb bending moments and torsional moments through controlled deformation in the reduced rigidity sections while maintaining overall connection strength.
Data Source
AI summary
A connection bar mounting structure includes: link members, each including a first hole part in a middle part; vehicle members, each configured to rotatably support each link member at a first fixation part of each link member; side frames, each configured to rotatably support each link member at a second fixation part of each link member opposite to the first fixation part across the first hole part; and a connection bar, each end thereof fixed to the first hole part of each link member. Each link member has a first bending rigidity reduced section between the middle part and the first fixation part and a second bending rigidity reduced section between the middle part and the second fixation part, the first and second bending rigidity reduced sections having bending rigidity smaller than those of the middle part, the first fixation part, and the second fixation part.