Vehicle Door Hinge Check Structure for Hill Retention
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Solution Overview
Problem
Existing vehicle door check structures are not effective in retaining the door in an open position, especially when the vehicle is parked on a hill, as the force of gravity can overcome the retaining mechanism, causing the door to close.
Innovation Solution
A vehicle door hinge structure with a check structure that includes a clip member and a bracket pin, where the clip member is engaged with the bracket pin to securely retain the door in the fully open position, requiring a predetermined level of force to move the door out of this position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional check structure with a movement restricting mechanism is used, then the door can be retained in open positions, but the retaining force is insufficient to overcome gravity when the vehicle is parked on a hill
Solution Approach 1:
The check structure transitions from a static retaining mechanism to a dynamic spring-loaded system. The spring member is compressed during door opening and automatically exerts increasing retaining force as the door approaches the fully open position, allowing the system to adapt to varying gravitational forces based on vehicle inclination.
Solution Approach 2:
The spring member changes its mechanical state from uncompressed to compressed during door operation. This parameter change enables the check structure to generate variable retaining force - low during initial opening and maximum at the fully open position - thereby overcoming gravity's effect on inclined surfaces.
2Reliability
If the check structure applies sufficient force to retain the door against gravity, then the door remains secure on hills, but the door cannot be moved easily from the open position
Solution Approach 1:
The spring member operates in periodic cycles of compression and decompression. During normal operation, the spring is compressed by door opening motion and releases energy to maintain retention. This periodic action allows easy door closing while maintaining secure retention when opened.
Solution Approach 2:
The dynamic spring mechanism allows the retaining force to be applied only when needed - automatically engaging during door opening and maintaining retention at the open position, while allowing easy closing when the spring decompresses. This dynamic behavior resolves the contradiction between strong retention and ease of operation.
Data Source
AI summary
A vehicle door hinge structure includes a body bracket, a hinge arm, a door bracket and a check structure. A first end of the hinge arm is attached to the body bracket for pivoting movement about a first pivot axis. The door bracket is attached to the second end of the hinge arm for pivoting movement about a second pivot axis. A clip member of the check structure has a main body, a clip portion and a retention portion. The main body of the clip member extends through a clip aperture of the hinge arm. The bracket pin is fixedly attached to the door bracket at a location spaced apart from the second pivot axis such that with the clip portion of the clip member engaged with the bracket pin, the door bracket is retained in a fixed position.