Vehicle Door Boundary Reinforcement for Local Deformation Resistance
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Solution Overview
Problem
The existing vehicle door structure with projected and recessed sections is prone to local deformation when a user applies force, making it difficult to achieve both sophisticated design and a luxurious feel due to the vulnerability of the boundary section between these sections.
Innovation Solution
A vehicle door structure that includes a panel reinforcement with a first frame section extending in the vehicle front-rear direction and a second frame section positioned to overlap with the boundary section, allowing load transmission to the first frame section when an inward load is applied, which is further reinforced by a truss configuration and adhesive bonding for improved load dispersion and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a door outer panel is provided with a projected section and a recessed section to achieve sophisticated design, then the design sophistication is improved, but the boundary section becomes vulnerable to local deformation when load is applied
Solution Approach 1:
The patent applies local reinforcement by providing a panel reinforcement specifically positioned at the boundary section between the projected and recessed sections. This reinforcement has a second frame section that extends in the vehicle width direction to specifically support the boundary section, while other parts of the door panel maintain their original design. This allows the boundary section to have different (reinforced) properties compared to other sections, resolving the contradiction between sophisticated design and resistance to local deformation.
Solution Approach 2:
The panel reinforcement is divided into multiple sections: a first frame section extending in the vehicle front-rear direction, a second frame section extending in the vehicle width direction at the boundary section, and a third frame section connecting these. This segmentation allows each part of the reinforcement to serve specific functions - the second frame section directly supports the boundary section against inward loads, while the first and third frame sections provide structural continuity and load distribution.
2Reliability
If the boundary section is reinforced to suppress local deformation, then the resistance to local deformation is improved, but the device complexity increases
Solution Approach 1:
The patent merges the reinforcement function into the existing door panel structure by integrating the panel reinforcement as an internal component fixed to the inner surface of the door outer panel. The reinforcement works together with the projected and recessed sections to form a unified structural system, rather than adding separate external reinforcement elements. This combining approach provides necessary reinforcement while minimizing additional complexity.
Data Source
AI summary
The vehicle door structure includes: a door outer panel including a projected section that projects outward in a vehicle width direction, a recessed section that is separated from the projected section and recessed inward in the vehicle width direction, and a boundary section between the projected section and the recessed section; and a panel reinforcement fixed to an inner surface in the vehicle width direction of the door outer panel. The panel reinforcement includes: a first frame section that extends in a vehicle front-rear direction; and a second frame section at a position that overlaps the boundary section in the vehicle side view and is configured to be able to transmit a load to the first frame section at the time when the load in an inward direction of the vehicle width direction is applied to the boundary section.