Four-Link Vehicle Door Hinge for B-Pillar-Free Opening
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Solution Overview
Problem
Vehicle door hinge systems without a B pillar face challenges in independent opening and closing operations due to predetermined rotation trajectories, and existing solutions like gooseneck hinges require significant space, affecting vehicle layout and openness perception.
Innovation Solution
A four-section link mechanism comprising hinged vehicle body rods and door rods with a fixing rotation point allows for independent opening and closing of vehicle doors without rotational interference, maintaining openness and flexibility in door operation sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional hinge system is used in a vehicle without a B pillar, then the door can be opened to provide a good open feeling, but the rotation trajectory of the door overlaps with the vehicle body or other doors, preventing independent opening and closing operations
Solution Approach 1:
The hinge mechanism is divided into multiple sections: a first hinge section connecting the door to the vehicle body, and a second hinge section connecting the first hinge section to the vehicle body. This segmentation allows each section to contribute to the overall rotation trajectory, enabling the door to move along a complex path that avoids overlap with the vehicle body or other doors while maintaining independent operation capability.
2Ease of operation
If a gooseneck type hinge device is used to solve the operation sequence problem, then independent door operation is enabled, but a large amount of free space is required in the vehicle body width direction, affecting vehicle layout
Solution Approach 1:
Instead of using a gooseneck type hinge that requires significant space in the horizontal dimension, the invention uses a multi-section hinge mechanism that achieves the same independent operation capability by utilizing vertical and depth dimensions. The first and second hinge sections are arranged at different positions and orientations, allowing the door to achieve its rotation trajectory without requiring excessive free space in the vehicle body width direction.
3Ease of operation
If a B pillar is added to enable independent door operation, then free operation order is achieved, but the open feeling is reduced
Solution Approach 1:
The invention extracts the door independence control function from the B pillar structure and relocates it to the hinge mechanism itself. By equipping the hinge mechanism with first and second hinge sections that can be independently controlled, the B pillar can be removed entirely, maintaining the open feeling while still enabling independent door operation. The hinge mechanism takes on the dual role of providing both the mechanical connection and the independent operation control.
Data Source
AI summary
In a door hinge device for the vehicle, in the vehicle without a B pillar, the four-section link including the first link formed of the first vehicle body rod and the first door rod that are mutually hinged and the second link formed of the second vehicle body rod and the second door rod that are mutually hinged is applied between the vehicle body bracket and the door bracket fixed to each hinge portion of the vehicle body and the door, it enables the opening/closing operation of the door without a rotational interference with the vehicle body or other door.