Vehicle Door Check Link Mechanism Intermediate Position Control
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Solution Overview
Problem
Conventional vehicle door check link mechanisms fail to effectively limit the opening of vehicle doors to an intermediate position, leading to potential damage from overextension or collision with objects, as the release lever can be activated at any door opening degree, allowing the door to swing open beyond the intended intermediate position.
Innovation Solution
A vehicle door check link mechanism comprising a vehicle mounting member, a vehicle door mounting member, a link member, and a latch member, where the latch member is configured to move between a latched and released position, preventing release within a first prescribed angle and allowing release within a second prescribed angle, ensuring the door is limited to an intermediate position until fully opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the release lever can be operated at any door opening degree, then the door can be freely opened to any position, but the door may inadvertently swing open beyond the intermediate position causing damage to hinges or collision with objects
Solution Approach 1:
The mechanism performs preliminary action by automatically latching the door at the intermediate position before full opening is achieved. The cam followers and link mechanism pre-position the door at the safe intermediate angle, preventing inadvertent over-opening before the user can operate the release lever.
Solution Approach 2:
The check assembly with cam followers acts as an intermediary mechanism between the door and the release lever. It mediates the door opening motion by forcing the door through the intermediate position and controlling when release can occur, preventing direct uncontrolled opening to any position.
2Object-affected harmful factors
If the door is limited to an intermediate position by the check assembly, then damage from overextension is prevented, but the door cannot be fully opened when necessary
Solution Approach 1:
The mechanism transitions from a static limitation to a dynamic system. The door is dynamically constrained to the intermediate position during normal operation, but the system can dynamically transition to full opening when the release lever is activated and the door reaches the appropriate angle, providing adaptability when needed.
Solution Approach 2:
The mechanism changes the operational parameters of door opening. It establishes a default parameter state where the door is limited to the intermediate position, but allows parameter change to full opening angle when specific conditions are met (release lever operation at the correct door angle), providing versatility.
3Reliability
If the latch member prevents release within a first prescribed angle, then the door is securely limited to intermediate position, but the door cannot be released early if needed
Solution Approach 1:
The mechanism incorporates feedback through the cam followers that track the door opening angle. The system monitors the door position and only permits latch release when the door reaches the second prescribed angle, providing reliable position control while preventing premature release. The feedback ensures the door is at the correct position before allowing state change.
Data Source
AI summary
A vehicle door check link mechanism comprises a vehicle mounting member, a vehicle door mounting member, a link member and a latch member. The vehicle mounting member and vehicle door mounting member can be mounted to a vehicle and vehicle door, respectively. The link member can be pivotally coupled to the vehicle mounting member and slidably coupled to the vehicle door mounting member, or vice-versa, to pivot through a pivotal movement range. The latch and link members can prevent the latch member from moving from a latched position that retains the link member to a released position that releases the link member while the link member is disposed within a first pivotal movement range angle, and permit the latch member to move to the released position while the link member is disposed within a second pivotal movement range angle that does not overlap the first pivotal movement range angle.