Vehicle Door Frame Reinforcement with Localized Thickness
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Solution Overview
Problem
Existing vehicle door frame structures face the challenge of increasing weight due to thicker reinforcement portions required for enhanced strength, which affects the overall weight of the vehicle door.
Innovation Solution
A vehicle door frame structure design where the hinge and lock reinforcement portions have thicker plate thicknesses than the frame-side sash portion, allowing these reinforcements to be strategically placed without increasing the entire frame's thickness, thereby controlling the weight increase, and optimizing the joint positions and surface formations for improved rigidity and bonding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the plate thickness of the reinforcement portion is increased to raise the strength, then the strength of the reinforcement portion is improved, but the weight of the entire frame member becomes heavier
Solution Approach 1:
The frame reinforcement applies local quality by making different portions have different plate thicknesses. Specifically, the hinge reinforcement portion and lock reinforcement portion have a first plate thickness (thicker), while the frame-side sash portion has a second plate thickness (thinner). This allows the reinforcement portions to have enhanced strength where needed without increasing the thickness of the entire frame member, thereby controlling the overall weight.
2Strength
If the plate thickness of the entire frame member is increased to match the strength of the reinforcement portion, then the strength of the reinforcement portion is improved, but the weight of the entire vehicle door becomes heavier
Solution Approach 1:
The frame reinforcement uses local quality by varying the plate thickness across different portions. The hinge reinforcement portion and lock reinforcement portion have a first plate thickness for high strength, while the frame-side sash portion has a second plate thickness. This localized thickening provides the necessary strength at critical points without requiring the entire frame member to be thick, thus preventing unnecessary weight increase in the vehicle door.
3Stability of the object's composition
If reinforcement portions are disposed in the frame reinforcement, then the structural integrity is improved, but the manufacturing complexity increases
Solution Approach 1:
The frame reinforcement merges multiple functions into a single component. It combines the frame-side sash portion with the hinge reinforcement portion and lock reinforcement portion into one integrated frame reinforcement member that is joined to the door inner panel. This merging approach provides enhanced structural integrity at critical points while avoiding the need for separate reinforcement components, thereby simplifying manufacturing.
Data Source
AI summary
An outer frame reinforcement is disposed on the door outer side of an inner panel-side sash portion of a door inner panel. The outer frame reinforcement includes a frame-side sash portion, a hinge reinforcement portion, and a lock reinforcement portion. Here, the upper end of the hinge reinforcement portion is joined to the front side lower end of the frame-side sash portion, and the upper end of the lock reinforcement portion is joined to the rear side lower end of the frame-side sash portion. Furthermore, the hinge reinforcement portion and the lock reinforcement portion are set thicker than the frame-side sash portion. Because of this, the outer frame reinforcement can be formed by making the reinforcement portions thick and joining the reinforcement portions to the frame-side sash portion. Because of this, it becomes unnecessary to increase the plate thickness of the entire outer frame reinforcement.