Sliding Door Rail Cover Flap With Dual-Shaft Low-Protrusion Structure
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Solution Overview
Problem
The existing structure of sliding door flaps in vehicles results in excessive protrusion and exposure of the center rail when the door is opened, leading to aesthetic issues, dust introduction, and operational defects due to foreign substances bonding with door components.
Innovation Solution
A dual shaft structure for the flap part that includes an installation hole, door flap links, elastic members, and a bracket system, allowing the flap to open vertically with a roller arm and guide, minimizing protrusion by positioning the center rail adjacent to the door and using an inclined surface for upward movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single hinge shaft structure is used for the flap, then the structure is simple, but the flap protrusion degree becomes excessively large when the door is opened
Solution Approach 1:
The single hinge shaft is divided into two separate hinge shafts (first hinge shaft and second hinge shaft). The first hinge shaft connects the flap to the door trim, while the second hinge shaft connects the arm to the flap. This segmentation allows independent rotation control at each joint, reducing the overall protrusion radius of the flap when the door is opened.
2Stability of the object's composition
If the center rail is positioned on the vehicle body, then the rail structure is stable, but the center rail becomes exposed to external appearance when the door is opened
Solution Approach 1:
A flap is introduced as an intermediary component between the door trim and the center rail. When the door is closed, the flap covers the center rail, preventing dust entry and maintaining aesthetic appearance. When the door is opened, the flap rotates to allow the roller arm to pass through, ensuring operational functionality while maintaining rail stability.
3Reliability
If the flap is opened excessively to cover the rail, then the rail coverage is complete, but the flap interferes with the fender
Solution Approach 1:
The flap transitioned from a static single-hinge structure to a dynamic dual-hinge structure with independent rotation capabilities. The first hinge shaft allows the flap to rotate relative to the door trim, while the second hinge shaft allows the arm to rotate relative to the flap. This dynamic configuration enables the flap to achieve complete rail coverage while controlling the protrusion radius to avoid fender interference.
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 dual shaft structure effectively covers the center rail, reducing protrusion and preventing foreign substances from entering the door mechanism, enhancing the aesthetic appearance and operational reliability of the sliding door.
Implementation Method 1
an elastic member provided between the second shaft fixing portion and the second rotation shaft and configured to provide a position restoring force to the flap
Data Source
AI summary
A structure of a flap part for covering a rail part when opening a sliding door of a vehicle, includes a door flap part including an installation hole, a door flap guide, door trim flap links, elastic members, and a flap, wherein the sliding door is supported by a roller arm, and the rail part, which is externally exposed when the sliding door is opened, is covered by the flap part, and wherein at a time of opening the door, a roller provided on the roller arm comes into contact with a door flap guide and pushes the door flap guide to ensure a movement space for the roller arm.