Vehicle Door Trim Frame Integration for Stiffness and Weight Reduction
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Solution Overview
Problem
Conventional vehicle door structures have increased thickness and weight due to the spacing between the door inner and outer panels, which complicates the mounting of door trims and affects stiffness, vibration resistance, and noise cancellation.
Innovation Solution
A door structure that combines a door trim frame with the door trim, featuring a U-shaped frame and reinforcement elements, which increases the stiffness and mounting stability of the door trim by integrating it closely with the door inner panel, reducing the need for additional support members and enhancing assembly productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the door inner panel and door outer panel are spaced apart to form a mounting space, then parts can be installed, but the door thickness and vehicle weight increase
Solution Approach 1:
The patent combines the door trim frame with the door inner panel by integrating the frame's rear surface with the panel's front surface, eliminating the need for a separate mounting space between panels. This merging reduces door thickness and weight while maintaining the ability to mount parts on the integrated frame structure
Solution Approach 2:
The patent transitions from a three-dimensional mounting space approach to a two-dimensional surface integration approach, where the door trim frame is directly coupled to the door inner panel surface. This dimensional change eliminates the depth requirement while preserving mounting functionality
2Strength
If a support member is attached to the door outer panel to increase structural stiffness, then door deformation is prevented, but device complexity increases
Solution Approach 1:
The door trim frame is merged with the door inner panel to form an integrated structure that provides both aesthetic coverage and structural support. This combination eliminates the need for separate support members attached to the door outer panel, reducing complexity while maintaining stiffness
Solution Approach 2:
The door trim frame serves multiple functions simultaneously: it provides aesthetic trim coverage, structural reinforcement, mounting surface for door parts, and integration with the door inner panel. This multi-functionality replaces what would otherwise require multiple separate components
3Ease of manufacture
If the door trim is mounted on the door inner panel without a frame, then assembly is simple, but mounting stiffness and vibration resistance are insufficient
Solution Approach 1:
The door trim is merged with the door trim frame, which is itself integrated with the door inner panel, creating a unified structure. This merging provides the mounting stiffness and vibration resistance needed while maintaining assembly simplicity through the unified structure
Data Source
AI summary
A door structure of a vehicle comprises a door trim and a door trim frame that combines with the door trim to increase stiffness of the door trim.