Vehicle Seat Frame Structure With Reduced Section Modulus Transition
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Solution Overview
Problem
Existing vehicle seat frame structures face challenges in balancing weight reduction with maintaining structural strength, particularly due to abrupt changes in section modulus, which complicates production and positioning of frames with differing thicknesses.
Innovation Solution
A frame structure for a vehicle seat featuring two frames that abut each other perpendicularly, with a section modulus reducing configuration at the edge portion of the pile area, allowing for a reduction in section modulus while maintaining structural strength, and incorporating a cutout portion for easy formation, enabling compatibility between weight reduction and strength retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If frames of different thickness are butt-welded to each other, then bonding strength is enhanced, but positioning difficulty increases and production becomes complex
Solution Approach 1:
The patent introduces a positioning protrusion and positioning groove as intermediary features that facilitate accurate alignment between frames of different thicknesses. The positioning protrusion on one frame fits into the positioning groove on the other frame, serving as a mediator that enables precise positioning during assembly, thereby resolving the contradiction between achieving strong bonding and maintaining ease of manufacture.
2Weight of moving object
If section modulus is reduced at the edge portion, then weight is reduced, but structural strength may be compromised
Solution Approach 1:
The patent applies local quality by reducing the section modulus only at the edge portion of the frame through a cutout configuration, while maintaining the full section modulus in the central region. This localized modification allows weight reduction in non-critical areas while preserving structural strength in load-bearing regions, effectively resolving the contradiction between weight reduction and strength maintenance.
3Stability of the object's composition
If an additional frame is provided between side frame main body and sub frame, then abrupt change in section modulus is suppressed, but device complexity increases
Solution Approach 1:
The patent extracts the unnecessary additional frame from the structure and replaces it with a cutout configuration in the edge portion of the existing frame. This extraction eliminates the complexity of adding another frame while still achieving the goal of suppressing abrupt changes in section modulus through the strategically positioned cutout, thereby resolving the contradiction between stability and complexity.
Data Source
AI summary
Embodiments of the present invention may include a frame structure for a vehicle seat having two frames, a pile portion, and a section modulus reducing configuration. The two frames extend in a specific direction. At the pile portion, the two frames abut each other in a direction perpendicular to the specific direction and connected to each other. The section modulus reducing configuration is formed at an edge portion in the specific direction of the pile portion, and is configured to achieve a reduction in section modulus.