Vehicle Rear Door Sliding Mechanism with Integrated Rail
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Solution Overview
Problem
Conventional sliding type rear door systems in vehicles require multiple support and guide rails, increasing vehicle weight, component count, and reducing design flexibility, while also requiring more space for opening and closing.
Innovation Solution
A rear door device with a two-rail system that allows for sliding opening and closing, featuring an upper rail with center, upper side, and lower side rails, supported by an upper slider and lower slider, along with a connection structure and locking mechanism, enabling smooth operation and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding type rear door system uses three support and guide rails (upper, middle, lower) to support the door, then the door can be stably supported and guided during opening/closing, but the vehicle weight increases and the number of components increases
Solution Approach 1:
The patent combines the upper, middle, and lower support rails into a single integrated rail structure. The rail includes an upper portion, middle portion, and lower portion that work together as one component, eliminating the need for separate support rails while maintaining door stability during sliding operation.
Solution Approach 2:
The single rail structure performs multiple functions simultaneously: it provides support, guidance, and structural reinforcement for the rear door. The rail's design allows it to fulfill the roles previously distributed across three separate rails, reducing component count while maintaining functional effectiveness.
2Reliability
If a sliding type rear door system uses three support and guide rails to support the door, then the door can be stably supported and guided during opening/closing, but the number of components increases
Solution Approach 1:
The patent merges three separate support rails into one integrated rail assembly. The single rail structure includes integrated upper, middle, and lower portions that collectively provide the support and guidance functions, thereby reducing the total number of components while maintaining door stability.
Solution Approach 2:
The multi-functional rail design allows a single component to perform the support and guidance tasks previously requiring three separate rails. This universal structure simplifies the overall door system while ensuring reliable operation throughout the opening and closing cycle.
3Ease of operation
If a sliding type rear door system uses multiple rails and related components, then the door can open completely, but the design freedoms of the vehicle are reduced
Solution Approach 1:
The single multi-functional rail structure provides complete door opening capability while offering greater design flexibility. The integrated rail can be configured in various ways to accommodate different vehicle body styles and design requirements, unlike multiple separate rails which constrain design options.
Solution Approach 2:
By combining multiple rails into one integrated structure, the patent enables complete door opening functionality while simplifying the overall design. This merged structure allows vehicle designers more freedom in styling and configuration compared to systems requiring multiple separate support rails.
Data Source
AI summary
A rear door device for a vehicle may include a rear door, an upper rail mounted to the rear door in a width direction, an upper slider inserted in the upper rail to support the upper rail, a lower rail mounted to a vehicle body and formed with a curved portion, a lower slider inserted in the lower rail and movable along the lower rail, an upper support structure having one end connected to the upper slider and the other end mounted to the vehicle body for supporting the upper slider, and a connection structure for connecting the lower slider to the upper rail. The rear door device permits the rear door to be opened or closed by sliding it forward or backward in the length direction of the vehicle.