Vehicle Door Reinforcement Structure for Lower-Edge Rigidity
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Solution Overview
Problem
The existing vehicle door structures, as described in Japanese Patent No. 6252507, have weak rigidity at the lower part of the door due to the forward and rearward outer edge panels being spaced apart in the front-rear direction.
Innovation Solution
A vehicle door structure is designed with an inner panel, an outer panel, and a reinforcement member that extends continuously over the forward, lower, and rearward portions of the inner panel, forming a continuous closed cross-sectional structure to enhance rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If forward and rearward outer edge panels are spaced apart in the front-rear direction, then the door structure allows for easier assembly and manufacturing, but the rigidity of the lower part of the door becomes weak
Solution Approach 1:
The patent merges the forward and rearward outer edge panels into a single continuous reinforcement member that extends along the entire lower edge of the door. This continuous structure eliminates the gap between separate panels, providing uninterrupted structural support and significantly improving the rigidity of the lower door section while maintaining ease of assembly through the simplified single-piece design.
2Strength
If a continuous reinforcement member is installed over the forward, lower, and rearward portions of the inner panel, then the rigidity of the lower part of the door is improved, but the device complexity increases
Solution Approach 1:
The continuous reinforcement member is designed with segmented attachment points that connect to the inner panel at discrete locations along its length. This segmentation allows for modular installation and simplifies the connection process, reducing overall structural complexity while maintaining the continuous support structure needed for door rigidity.
Data Source
AI summary
A vehicle door structure includes: an inner panel including a forward portion, lower portion, and a rearward portion; an outer panel disposed on a vehicle outer side of the inner panel; and a reinforcement member installed between the inner panel and the outer panel. The reinforcement member is disposed extending continuously over the forward portion, the lower portion, and the rearward portion of the inner panel.