Vehicle Body Trim Panel Mounting via Raised Surface Aperture
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Solution Overview
Problem
The limited body surface area on vehicle body panels poses a challenge for securely attaching trim panels, particularly at the side edges of the back door, where conventional mounting solutions are insufficient.
Innovation Solution
A vehicle body structure featuring a raised mounting surface on the exterior panel with a tapering design and a pin-grommet arrangement that allows for secure attachment of trim panels, even in areas with limited space, by utilizing a pin that snaps into a grommet and nuts to ensure stability and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If trim panels are attached to the side edges of the back door using conventional mounting solutions, then the attachment security is insufficient, but the body surface area available for mounting is limited
Solution Approach 1:
The patent transitions from surface-level attachment to volumetric attachment by creating a recessed cavity in the exterior panel and filling it with foam material. This three-dimensional approach provides substantial attachment security within the limited two-dimensional space of the back door side edge, resolving the contradiction between attachment reliability and available surface area.
Solution Approach 2:
The patent employs a composite mounting structure combining the exterior panel, recessed cavity, foam filling material, and trim panel. This multi-material composite approach creates a robust attachment system that achieves high reliability despite the constrained body surface area, as each material contributes specific properties (structural support, cushioning, bonding) to the overall solution.
2Stability of the object's composition
If the mounting surface is raised to provide secure attachment, then the attachment stability improves, but the manufacturing complexity increases
Solution Approach 1:
The recessed cavity and foam filling are prepared in advance during panel manufacturing, creating a pre-formed mounting structure. This preliminary action ensures attachment stability is built into the design from the outset, while the modular nature of the pre-prepared cavity reduces on-site manufacturing complexity when installing trim panels.
Data Source
AI summary
A vehicle body structure includes a vehicle body panel, a trim panel and a first mounting arrangement. The vehicle body panel includes interior and exterior attached panels. The exterior panel includes a base surface extending along a peripheral edge of the vehicle body panel and a mounting surface that is raised relative to an adjacent portion of the base surface. The mounting surface defines an aperture that extends to an opposite concave surface of the exterior panel. The base surface of the exterior panel abuts the interior panel along a majority of a perimeter of the mounting surface. The trim panel is coupled to the vehicle body panel. The first mounting arrangement couples the trim panel to the vehicle body panel and engages a periphery of the aperture through the mounting surface to at least partially retain the trim panel to the vehicle body panel in an installed position.