Vehicle Seat Cushion Pan Structure for Collision Load Control
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Solution Overview
Problem
Traditional vehicle seating assemblies face challenges in balancing size constraints, design requirements, and safety during collisions, while also needing to expedite manufacturing and reduce manufacturer injury during installation.
Innovation Solution
A cushion pan design with a body portion featuring module retention apertures, suspension assembly retainers, a peripheral flange with trim tabs, and support ribs, along with deformation notches and apertures for controlled deformation in collisions, and a hemmed edge to prevent sharp edges, enhancing safety and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional vehicle seating assemblies are constructed to meet size constraints and design requirements, then the seating assembly fits within the interior cabin, but the construction uses excessive material and lacks robust safety features
Solution Approach 1:
The cushion pan is divided into multiple functional zones including a headrest portion, seat portion, and backrest portion, each with optimized material distribution. The headrest portion includes a deformation zone with reduced material density to allow controlled deformation during collisions, while other areas maintain sufficient structural integrity, thus improving safety without excessive material usage.
Solution Approach 2:
Different regions of the cushion pan have different material properties and structural characteristics. The deformation zone in the headrest portion has reduced material density and includes deformation notches, while the seat and backrest portions have higher material density for structural support. This local differentiation improves collision safety while minimizing overall material consumption.
2Reliability
If traditional seating assemblies use robust construction, then safety during collisions improves, but manufacturing time increases and complexity increases
Solution Approach 1:
The deformation notches and apertures are pre-formed in the headrest portion during the molding process, eliminating the need for post-manufacturing operations. The cushion pan is designed as a unitary structure with all safety features integrated, allowing rapid production through single-step molding while maintaining robust collision safety performance.
3Adaptability or versatility
If traditional seating assemblies have complex structures, then design requirements are met, but the possibility of injury to manufacturers during installation increases
Solution Approach 1:
Instead of adding protective features to a complex existing structure, the design inverts the approach by creating a simplified unitary structure from the beginning. The cushion pan is molded as a single piece with all features integrated, eliminating complex assembly steps and sharp edges that could cause injury during installation, while still meeting all design requirements.
4Reliability
If the cushion pan includes deformation features for collision safety, then passenger protection improves, but the structural complexity increases
Solution Approach 1:
The deformation features are merged into the headrest portion of the unitary cushion pan structure. The deformation notches and apertures are integrated directly into the molded headrest portion, eliminating the need for separate deformation components or complex assembly operations, thus improving passenger protection without significantly increasing structural complexity.
Data Source
AI summary
A cushion pan for a vehicle seating assembly includes a body portion having at least one pocket including a module retention aperture disposed therein. First and second suspension assembly retainers are disposed in the body portion. A peripheral flange extends substantially orthogonal to the planar extent of the body portion and includes a plurality of trim tabs. A plurality of support ribs extend through a midportion of the body portion.