X-Type Guide Bar Structure for Vehicle Sliding Door Stability
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Solution Overview
Problem
The existing sliding door systems for vehicles, which rely on only center and lower rails for support, suffer from door swaying and reduced design freedom due to the limited number of support points, leading to increased vehicle weight and complexity.
Innovation Solution
An X-type guide bar structure is introduced, featuring a lower rail on the vehicle body, a guide rail on the door, first and second guide sliders, and guide bars that overlap in an X shape, providing additional support points and adjustable friction to stabilize the sliding doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only center and lower rails are used to support the sliding door, then the number of components is reduced and design freedom is improved, but the door becomes unstable and sways during operation
Solution Approach 1:
The patent introduces guide bars that extend in the width direction of the vehicle body, adding a dimensional element perpendicular to the traditional rail arrangement. This creates additional support points laterally, preventing door swaying without requiring additional rails in the longitudinal direction, thus maintaining component reduction while improving stability.
Solution Approach 2:
The support function is segmented between the center rail, lower rail, and guide bars, with each component performing a specific stabilization function. The guide bars specifically address lateral swaying while the rails handle primary support, allowing the system to achieve enhanced stability through functional division rather than adding more comprehensive rail structures.
2Stability of the object's composition
If three rails (upper, center, and lower) are used to support the sliding door, then door stability is improved, but the vehicle weight and number of components increase
Solution Approach 1:
The patent extracts the lateral stabilization function from the traditional three-rail system and implements it through separate guide bars. This allows the removal of the upper rail while maintaining stability through the guide bars' lateral support, reducing component count while preserving the essential stabilization function.
Solution Approach 2:
Instead of adding more rails in the longitudinal direction, the patent introduces guide bars extending in the width direction, utilizing a different spatial dimension to achieve stabilization. This dimensional shift allows the system to maintain stability with fewer longitudinal rails.
3Device complexity
If two support points (lower rail and center rail) are used, then device complexity is reduced, but the door rotates about an imaginary axis connecting the contact points
Solution Approach 1:
The guide bars extend in the width direction of the vehicle body, creating support points laterally that prevent rotation about the longitudinal axis. This dimensional addition transforms the two-point support into a multi-point support system that resists rotational movement without significantly increasing complexity.
Solution Approach 2:
The guide bars are positioned asymmetrically relative to the door, with specific positioning that creates optimal resistance against rotational forces. The asymmetric arrangement of guide bars provides targeted stabilization against the specific rotation mode caused by two-point support.
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 X-type guide bar structure effectively prevents door swaying by distributing the load across four support points, enhancing stability and reducing the likelihood of rotational movement, while allowing for controlled operation force adjustments.
Implementation Method 1
the frictional force formed between the first guide bar and the second guide bar is adjusted by the guide pin, such that the operating force of the X-type guide bar structure may be controlled
Data Source
AI summary
An X-type guide bar structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower slider rollably connected to the lower rail, a guide rail mounted on a door in the longitudinal direction of the vehicle body, first and second guide sliders movably connected to the guide rail, and first and second guide bars having guide paths in the longitudinal direction, wherein the first guide bar is rotatably connected to the lower slider and the second guide slider, the second guide bar is rotatably connected to the lower rail and the first guide slider, the first and second guide bars overlap in an X shape so that the guide paths face each other, and a guide pin is inserted into a central portion of the X shape.