Front Door Link Mechanism for Wider Opening Without Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle door devices are not well-suited for front doors, lacking adaptability and mountability, and often result in interference and reduced door opening amounts due to their design.
Innovation Solution
A vehicle door device with independent first and second link mechanisms, each having rotary coupling points with the vehicle body and door, allowing the front and rear doors to open and close in opposite directions, with the front door opening towards the front and the rear door opening towards the rear, and incorporating a coupling length variable mechanism to prevent interference at the fully closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a link mechanism is designed for rear doors with rotary coupling points outside the door opening, then the door can open toward the rear with sufficient clearance, but the mechanism cannot be adapted to front doors where the opening direction and spatial constraints differ
Solution Approach 1:
The patent applies local quality by positioning the first rotary coupling point of the first link arm inside the dash panel at a front portion of the vehicle interior, which is a localized structural adaptation specifically for front doors. This differs from rear door configurations where coupling points are outside the door opening, allowing the mechanism to accommodate the unique spatial constraints and opening requirements of front doors while maintaining the overall link mechanism structure
2Length of moving object
If the first rotary coupling point is positioned inside the dash panel, then the front door can open toward the vehicle front side with larger opening amount, but the link arm configuration becomes more complex
Solution Approach 1:
The patent utilizes another dimension by moving the first rotary coupling point from the traditional outside-door-opening position to inside the dash panel, effectively changing the spatial dimension and reference frame of the link mechanism. This dimensional repositioning allows the front door to achieve a larger opening amount toward the vehicle front side while the link arms maintain manageable lengths and configurations through optimized geometric relationships
3Ease of operation
If independent link mechanisms are used for front and rear doors, then each door can have independent opening trajectories without order restrictions, but the overall device complexity increases
Solution Approach 1:
The patent applies segmentation by providing independent link mechanisms for the front door (first link arm with first and second rotary coupling points) and rear door (second link arm with its own rotary coupling points). This segmentation allows each door to operate independently with its own optimized opening trajectory, improving getting-on-and-off performance without requiring coordinated operation between doors, while the modular nature of the segmented mechanisms keeps individual component complexity manageable
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables larger door opening amounts while minimizing interference, improving mountability and getting-on-and-off performance for front doors by allowing independent opening and closing trajectories without order restrictions, and enhancing support rigidity through specific link arm configurations.
Implementation Method 1
first and second link arms having a first rotary coupling point with respect to a vehicle body and a second rotary coupling point with respect to a front door of a vehicle. The front door is opened toward a vehicle front side based on an operation of a link mechanism formed of the first and second link arms
Data Source
AI summary
A vehicle door device includes first and second link arms having a first rotary coupling point with respect to a vehicle body and a second rotary coupling point with respect to a front door of a vehicle. The front door is opened toward a vehicle front side based on an operation of a link mechanism formed of the first and second link arms. The first link arm has the first rotary coupling point inside a dash panel provided at a front portion of a vehicle interior.