Multi-Axis Vehicle Door Hinge Guide Path
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Solution Overview
Problem
Vehicle door hinge assemblies that open along multiple axes face interference with road curbing and obstacles, and existing designs often result in a visible cutline and inadequate clearance, leading to issues with door stability and aesthetics.
Innovation Solution
A multi-axis hinge assembly with a first hinge pivoting about a first axis, a guide surface, and an expandable strut that secures the door to a bracket supported on both axes, allowing the door to follow a continuous guide path and maintain a visually imperceptible cutline by locating it below the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-axis hinge is used, then the door structure is simple, but the door cannot avoid interference with road curbing and obstacles when opening
Solution Approach 1:
The hinge assembly is segmented into multiple independent rotational axes: a first axis for vertical swinging motion and a second axis for upward motion. This segmentation allows the door to follow a complex two-stage swing path that avoids obstacles while keeping each individual hinge mechanism relatively simple and manageable.
Solution Approach 2:
The door opening motion transitions from a single-plane rotation to a two-dimensional compound motion by adding a second rotational axis perpendicular to the first. This dimensional change enables the door to clear obstacles and curbing by moving upward after the initial outward swing, creating a three-dimensional opening trajectory.
2Reliability
If a multi-axis hinge is used to avoid obstacles, then the door can clear curbing, but the door may fall back into the A-pillar and swing upward before sufficient clearance is achieved
Solution Approach 1:
A guide surface is introduced as an intermediary element between the door and the hinge mechanism. This guide surface provides a predetermined contour that physically guides the door through the correct two-stage swing path, ensuring reliable clearance from obstacles and preventing uncontrolled backward movement into the A-pillar.
Solution Approach 2:
The guide surface contour can be varied to change the angular configuration of the door opening path. By modifying the geometric parameters of the guide surface, the system adapts to different vehicle designs and obstacle conditions while maintaining reliable door operation.
3Object-affected harmful factors
If the door opens along a varied path to avoid obstacles, then clearance with the front fender is improved, but the cutline becomes visible
Solution Approach 1:
Instead of trying to hide the cutline by positioning it higher on the vehicle body, the design inverts the approach by deliberately locating the cutline below the vehicle where it is visually imperceptible. This allows the door to follow the varied multi-axis opening path needed to clear obstacles while maintaining seamless exterior appearance from the viewer's perspective.
4Adaptability or versatility
If the door is supported to pivot about two axes, then the door can achieve complex swing paths, but the device complexity increases
Solution Approach 1:
The guide surface combines multiple guiding functions into a single integrated component that simultaneously controls both the first and second axis rotations. This merging of functions reduces the number of separate control mechanisms needed, thereby reducing overall device complexity while maintaining the flexibility of the two-axis swing path.
Data Source
AI summary
A vehicle door hinge assembly includes a first hinge supported to pivot about a first axis, a guide surface, a door located at a side of the vehicle, a bracket to which the door is secured, supported to pivot about the first axis and a second axis and including a follower engaged with the guild surface, and a strut secured to the bracket that extends as the bracket pivots toward an open position and retracts as the bracket pivots toward a closed position.