Vehicle Cab Door Garnish for Common Front Door Fitment
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Solution Overview
Problem
Vehicles with two-door and four-door cabins require unique front doors due to formability constraints of side outer panels, leading to metallic failure when trying to conform to sharp radius corners, necessitating a solution for a common front door design that can accommodate both configurations.
Innovation Solution
A garnish is mounted directly onto the carriage between the outer panel and rocker panel, with edges forming approximately a 90-degree angle, allowing a common door to be used for both two-door and four-door vehicles, and having an identical outer surface structure to the outer panel for a seamless integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the side outer panel is formed to conform to the sharp radius corner of the front door, then the door can mate flush with the rear passenger doors, but the panel undergoes metallic failure during the forming process
Solution Approach 1:
The side outer panel is segmented into two distinct parts: a main panel body and a separate garnish piece. The garnish is specifically designed to cover the sharp radius corner area, allowing the main panel to avoid the problematic forming process while still achieving the desired corner shape appearance. This segmentation resolves the contradiction by isolating the sharp corner requirement from the panel forming process that causes metallic failure.
Solution Approach 2:
The garnish acts as an intermediary element between the side outer panel and the front door corner. Instead of directly forming the sharp radius corner in the metal panel (which causes failure), the garnish is applied as a separate component to create the sharp corner appearance. This intermediary approach allows the panel to maintain its structural integrity while still achieving the required corner geometry for proper door mating.
2Ease of manufacture
If unique front doors are designed for two-door and four-door cabins, then each door configuration can be optimized, but the manufacturing complexity and inventory requirements increase
Solution Approach 1:
The front door design incorporates a universal mounting system that allows the same door assembly to be installed in both two-door and four-door vehicle configurations. The door includes standardized mounting points and dimensions that accommodate different vehicle types, eliminating the need for configuration-specific door designs. This universality reduces manufacturing complexity and inventory requirements while maintaining adaptability across different vehicle body styles.
Data Source
AI summary
A garnish configured to enable use of a common door for a two-door vehicle and a four-door vehicle. The garnish may have a body. The body may be directly mountable onto a carriage of the two-door vehicle between an outer panel and a rocker panel of the two-door vehicle. The body may have an edge that is flush to a rear edge of the common door when mounted. The body may have at least two edges forming approximately a 90-degree angle.