Motor Vehicle Door Opening Structure Reinforcement
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Solution Overview
Problem
The existing opening portion structure between the edge portions of an outer panel and an inner panel, such as in a door waist portion, suffers from decreased rigidity and accuracy due to the interposition of inner reinforcements, leading to compromised air tightness and glass retention.
Innovation Solution
The structure enhances positional accuracy by coupling the outer reinforcement directly to the inner panel between the end wall and terminal end portion of the inner reinforcement, eliminating the need for interposed inner reinforcement, thereby improving the rigidity and accuracy of the edge portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the inner waist reinforcement is interposed between the support member and the door inner panel to enhance rigidity, then the rigidity of the opening portion in the opposing direction is improved, but the positional accuracy of the edge portions decreases due to molding errors and assembly errors of the interposed reinforcement
Solution Approach 1:
The invention extracts and removes the inner waist reinforcement from the coupling path between the support member and the door inner panel. By eliminating this interposed component, the patent directly addresses the positional accuracy problem caused by its molding and assembly errors, while maintaining rigidity through the direct coupling of the outer waist reinforcement to the door inner panel at a strategically selected position.
2Ease of operation
If the opening portion is provided between the edge portions of the outer panel and the inner panel to allow door glass movement, then the ease of operation is improved, but the air tightness and glass retention decrease due to reduced rigidity of the opening portion
Solution Approach 1:
The invention applies local quality by selectively reinforcing specific areas of the opening portion structure. The outer waist reinforcement is coupled to the door inner panel at a position between the end wall and the terminal end portion of the inner reinforcement, creating localized rigidity enhancement precisely where needed to maintain air tightness and glass retention, while preserving the overall functionality of door glass movement.
Data Source
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AI summary
An opening portion structure in which an opening portion is provided between edge portions of an outer panel and an inner panel, and inner surfaces of the edge portions respectively of the outer panel and the inner panel are reinforced by an outer reinforcement and an inner reinforcement, wherein a terminal end portion of the outer reinforcement in a longitudinal direction is coupled to the inner panel at a position between an end wall of the inner panel and a terminal end portion of the inner reinforcement in the longitudinal direction.