Vehicle Slide Door Rail Positioning for Stability
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Solution Overview
Problem
Existing slide door devices for vehicles face limitations in design and structure due to exposed rails, and they have limited opening and closing amounts, especially when using hinges, which restrict their application to larger door strokes.
Innovation Solution
A slide door device with a body side lower rail and a door side lower rail that allows the slide door to move in a front-rear direction, using guide roller units to open and close the door opening, with the door side lower rail positioned below the floor surface in the fully closed state, eliminating exposure and enhancing support stability through a triangular support structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door side lower rail and door side center rail are exposed to the vehicle interior, then the slide door can be opened and closed, but the design and structure of the slide door are limited
Solution Approach 1:
The patent extracts the door side lower rail from the visible vehicle interior space by positioning it below the floor surface. Only the necessary guide roller units remain exposed, while the rail itself is hidden, thereby removing the design limitation imposed by exposed rails and allowing greater versatility in door trim and interior design.
2Ease of operation
If a hinge is used for opening and closing the slide door, then the door can be opened and closed, but the opening-closing amount is limited and the size of the hinge must be increased
Solution Approach 1:
The patent employs a dynamic sliding mechanism with guide roller units that move along rails, replacing the static hinge connection. This dynamic system allows the door to achieve a larger opening-closing amount by sliding along the rail path rather than being constrained by the fixed pivot point of a hinge.
3Ease of operation
If a hinge is used to support the slide door, then the door can be opened and closed, but the disposition space for the hinge must be increased
Solution Approach 1:
The patent extracts the hinge from the system entirely, replacing it with a sliding mechanism using guide roller units and rails. This eliminates the need for large disposition space around the lower portion of the slide door that would be required for a hinge of sufficient size.
4Adaptability or versatility
If the door side lower rail is positioned below the floor surface, then the rail is not exposed to the vehicle interior, but the support stability must be enhanced
Solution Approach 1:
The patent positions the door side lower rail in the vertical dimension below the floor surface, utilizing the space underneath the floor. This dimensional relocation allows the rail to remain hidden from the vehicle interior while maintaining its structural function, and the support stability is enhanced through the triangular support structure formed by the rail positions.
Data Source
Figure 1
Figure 2A~2B
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AI summary
Provided is a slide door device for a vehicle, including: a body side lower rail disposed below a door opening formed on a side of a vehicle body and extends in a front-rear direction; a body side rail disposed above the body side lower rail and behind the door opening and extends in the front-rear direction; a door side lower guide roller unit and a door side guide roller unit connected to a slide door and configured to slide on the body side lower rail and the body side rail respectively; a door side lower rail disposed in a lower portion of the slide door positioned below the floor surface in the door opening and extends in the front-rear direction; and a body side lower guide roller unit connected to the lower portion of the door opening and configured to slide on the door side lower rail.