Vehicle Door Frame Isolating Aperture for Lateral Force Reduction
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Solution Overview
Problem
Conventional door assemblies in vehicles experience abnormal lateral movement of the door lining during window operation, primarily due to forces transmitted from the window regulator, which can lead to perceived weakness or poor quality, especially when the regulator mounting structure is near the door lining mounting structure.
Innovation Solution
The door frame assembly incorporates a plurality of mounting apertures for the window regulator and door lining, with an elongated isolating aperture between them to reduce lateral forces transferred from the regulator to the door lining, minimizing deflection and abnormal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the window regulator mounting structure is positioned near the door lining mounting structure to save space, then layout flexibility is improved, but lateral forces from the regulator transfer to the door lining causing abnormal movement
Solution Approach 1:
The door frame is segmented by introducing isolating apertures that divide the mounting structure into separate zones. These apertures create distinct mounting regions for the window regulator and door lining, allowing close positioning while preventing force transfer between them through the frame structure.
Solution Approach 2:
The isolating apertures act as intermediary elements between the regulator mounting apertures and door lining mounting apertures. By positioning these apertures between the two mounting structures, they serve as mediators that block the transmission of lateral forces while maintaining the overall structural integrity.
2Stability of the object's composition
If separate members (steel stiffeners) are added to the mounting structure to prevent door lining movement, then door lining stability is improved, but device complexity and weight increase
Solution Approach 1:
Instead of adding stiffening members, the solution segments the mounting structure by creating isolating apertures. This segmentation approach achieves force isolation through structural division rather than reinforcement, avoiding increased complexity and weight.
Solution Approach 2:
The solution extracts the force transmission path from the mounting structure by removing material to create isolating apertures. This extraction eliminates the problematic force transfer route without requiring additional stiffening components.
3Stability of the object's composition
If the material thickness or strength of the mounting structure is increased to minimize deflection, then door lining stability is improved, but weight and manufacturing cost increase
Solution Approach 1:
The mounting structure is segmented into isolated zones by apertures, allowing thin-walled construction in each zone while maintaining overall stability. This segmentation enables force isolation without requiring increased material thickness throughout the entire structure.
Solution Approach 2:
The solution applies local quality by creating specific isolating features (apertures) only where needed between the regulator and door lining mounting points. The material thickness remains standard elsewhere, achieving stability through localized structural modification rather than universal thickening.
4Stability of the object's composition
If the door lining mounting points are moved as far as possible from the regulator mounting points, then door lining stability is improved, but layout flexibility and design freedom are reduced
Solution Approach 1:
The isolating apertures create segmented zones that allow mounting points to be positioned close together while maintaining stability. The apertures act as barriers that prevent force transfer, enabling close spacing of mounting points without compromising door lining stability.
Solution Approach 2:
The isolating apertures serve as intermediary elements that enable close positioning of mounting points. By placing these apertures between the regulator and door lining mounting points, they mediate the interaction between closely spaced components, blocking force transfer while allowing compact layout.
Data Source
AI summary
A door frame for a vehicle includes a door frame, a window regulator mounted to the door frame for opening and closing a window pane, and a door lining mounted to the door frame. A plurality of mounting apertures is defined in the door frame, including at least one first mounting aperture for mounting the window regulator and at least one second mounting aperture for mounting the door lining. An isolating aperture is defined in the door frame between the at least one first aperture and the at least one second aperture for isolating the at least one second aperture from the at least one first aperture to thereby reduce lateral forces imparted to the door frame from the window regulator from transferring to the door lining.