Vehicle Seat Anchor Bracket Segmentation for Load Resistance
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Solution Overview
Problem
Existing seat slide devices for vehicles face challenges in providing sufficient resistance to loads applied during collisions without increasing the size or weight of the anchor bracket, which is often constrained by its narrow placement and proximity to other seat structural members.
Innovation Solution
The seat structure incorporates an anchor bracket composed of two distinct members, a first bracket with a thinner plate thickness and a second bracket with increased thickness, where the first bracket extends forwardly beyond the second bracket, allowing for efficient load distribution and resistance without excessive weight, and the brackets' overlapping side portions enhance shear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the anchor bracket is enlarged to improve load resistance, then the resistance against upward load and lateral load is improved, but the available space is insufficient due to narrow placement beside the seat
Solution Approach 1:
The anchor bracket is divided into two separate brackets: a first bracket that receives upward loads and a second bracket that receives lateral loads. This segmentation allows each bracket to be optimized for its specific load direction, achieving sufficient overall load resistance without requiring a single large bracket that would exceed the available space.
2Strength
If the plate thickness of the anchor bracket is increased to improve load resistance, then the resistance against collision loads is improved, but the weight of the anchor bracket increases improperly
Solution Approach 1:
Each bracket is designed with different plate thicknesses optimized for their specific functions: the first bracket has a thickness optimized for upward load resistance while the second bracket has a thickness optimized for lateral load resistance. This local optimization ensures sufficient load resistance for each direction without unnecessarily increasing the weight of both brackets uniformly.
3Strength
If the anchor bracket is made larger to provide sufficient resistance, then the resistance performance is improved, but the interference with other seat members increases
Solution Approach 1:
By segmenting the anchor bracket into two smaller, specialized brackets positioned at different locations, the design achieves sufficient resistance performance while reducing interference with other seat members. Each smaller bracket can be positioned more precisely to avoid conflicts with surrounding components.
Data Source
AI summary
A seat structure for a vehicle comprises a seat, a seat rail comprising a lower rail and an upper rail, and an anchor bracket fixing an anchor (a first anchor) of a seatbelt device to the upper rail. The anchor bracket includes a first bracket provided with a first bottom portion fixed to the upper rail and a first side portion rising upwardly from the first bottom portion and a second bracket provided with a second bottom portion fixed to the upper rail, a second side portion rising upwardly from the second bottom portion, and an anchor attachment portion where the anchor is attached. The first side portion and the second side portion are joined together, overlapping each other in a vehicle width direction, and the first bracket extends forwardly beyond the second bracket.