Sliding Door Sway Prevention via Guide Roller and Stopper
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Solution Overview
Problem
Sliding doors in vehicles supported by only center and lower rails lack stability due to single contact point in the load direction, leading to sway and difficulty in securely fastening the latch and striker when closed.
Innovation Solution
A structure incorporating a lower rail, a lower rail roller unit, a lower rail swing arm, a guide roller unit, and a guide stopper that provides three support points, preventing sway and ensuring stable door operation by using a guide roller and stopper configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only center and lower rails are used to support the sliding door, then the device complexity is reduced, but the stability of the sliding door deteriorates due to single contact point in load direction
Solution Approach 1:
The guide roller unit and guide stopper configuration adds a dimensional constraint by providing lateral guidance in addition to the vertical support from the lower rail. The guide roller moves within the guide stopper's groove, creating a two-dimensional constraint system that prevents sway while maintaining the simplified single-rail structure.
Solution Approach 2:
The guide roller unit acts as an intermediary element between the sliding door and the guide stopper, transferring lateral forces and providing stable guidance. This intermediary component enables the system to achieve multi-point support functionality without requiring multiple complex rails.
2Weight of stationary object
If only center and lower rails are used, then the weight of the vehicle is reduced, but the sliding door cannot be stably supported due to rotation about imaginary axis
Solution Approach 1:
The guide stopper's groove structure provides lateral constraint in the horizontal dimension, complementing the vertical support from the lower rail. This creates a stable support system that prevents rotational movement about the imaginary axis while maintaining minimal vehicle weight through the single-rail design.
Solution Approach 2:
The guide roller unit concentrates the stabilization function at a specific location (where the guide roller contacts the guide stopper), providing localized lateral support that prevents rotation without requiring distributed support from multiple heavy rails throughout the door structure.
3Stability of the object's composition
If guide roller unit and guide stopper are added, then the stability of the sliding door is improved through three support points, but the device complexity increases
Solution Approach 1:
The guide roller unit and guide stopper are integrated into the existing lower rail system, where the guide stopper is mounted on the lower rail assembly and the guide roller works in conjunction with the lower rail roller unit. This merging approach provides three support points without creating entirely separate systems, thereby limiting the increase in overall device complexity.
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 structure effectively stabilizes the sliding door, preventing sway and facilitating easy closure by providing multiple contact points, thus allowing secure fastening of the latch and striker.
Implementation Method 1
a lower rail roller unit rollably connected to the lower rail
Implementation Method 2
a guide roller unit fixedly connected to the lower rail and having a guide roller rotatably connected thereto
Implementation Method 3
a lower rail swing arm rotatably connected to the lower rail roller unit and the door
Data Source
AI summary
A structure for preventing opposite sliding doors from swaying is provided. The structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower rail roller unit rollably connected to the lower rail, a lower rail swing arm rotatably connected to the lower rail roller unit and a door, a guide roller unit fixedly connected to the lower rail, the guide roller unit including a guide roller rotatably connected to the lower rail, and a guide stopper fixedly connected to the door. The guide stopper includes a guide route formed inside the guide stopper and configured to serve as a rolling movement route for the guide roller, an exit/entrance portion formed at a first end of the guide route, and a stop portion formed at a second end of the guide route.