Seat Bracket Crossmember Layout for Side-Impact Floor Strength
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Solution Overview
Problem
In vehicles, the seat fixing section to the floor panel is prone to deformation under heavy loads, particularly during side collisions, as the existing configurations do not adequately distribute the load across the floor panel, compromising the vehicle's structural integrity.
Innovation Solution
The implementation of a vehicle design featuring a floor panel with a first and second crossmember extending in the left-right direction, joined by a front-rear extending joining member, which supports a seat bracket, along with additional crossmembers and reinforcement elements, to distribute loads effectively and enhance structural rigidity and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the seat is fixed directly to the floor panel, then the structure is simple, but the floor panel deforms under heavy loads
Solution Approach 1:
The floor panel structure is segmented by introducing crossmembers (first crossmember 30 and second crossmember 32) that divide the floor panel into multiple sections. This segmentation distributes the load from the seat fixing section across different areas of the floor panel, preventing localized deformation and enhancing overall structural strength.
Solution Approach 2:
The solution transitions from a two-dimensional floor panel to a three-dimensional framework by adding crossmembers that extend in the vehicle width direction. This dimensional enhancement creates a spatial structure that provides additional load-bearing paths and improves the floor panel's resistance to deformation under vertical and lateral loads.
2Strength
If reinforcement elements are added to the floor panel, then the structural strength is improved, but the device complexity increases
Solution Approach 1:
The crossmembers serve multiple functions: they reinforce the seat fixing section, provide structural support for the battery pack, and enhance the overall floor panel rigidity. By making these structural elements multi-functional, the design achieves improved strength without proportionally increasing complexity, as the same components address multiple structural requirements.
Solution Approach 2:
The reinforcement elements (crossmembers and joining members) are merged with the existing floor panel structure to form an integrated load-bearing framework. This combination creates a unified structural system where the floor panel, crossmembers, and joining members work together as a single reinforced assembly, reducing the need for separate reinforcement components.
3Stability of the object's composition
If multiple crossmembers are added to distribute loads, then the structural integrity is improved, but the manufacturing complexity increases
Solution Approach 1:
The load distribution system is segmented into modular components (first crossmember 30, second crossmember 32, and joining members 34, 36) that can be manufactured separately and assembled in a standardized sequence. This segmentation allows each component to be optimized for manufacturing while maintaining the overall structural integrity through controlled assembly.
Solution Approach 2:
The crossmembers and joining members are designed to be pre-assembled into a rigid framework before being installed on the vehicle. This preliminary assembly creates a pre-stabilized structural unit that simplifies the final installation process and ensures proper alignment and structural integrity without requiring complex on-site assembly procedures.
Data Source
AI summary
A vehicle includes: a floor panel; a first crossmember that extends in a vehicle left-right direction along the floor panel; a second crossmember that extends in the vehicle left-right direction along the floor panel and is positioned rearward of the first crossmember in a vehicle front-rear direction; a joining member that extends in the vehicle front-rear direction along the floor panel and joins the first crossmember and the second crossmember to each other; and a seat bracket which is provided in the joining member and on which a seat for a user to sit on is fixed.