Sliding Door Wire Harness Feeding Structure
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Solution Overview
Problem
Conventional feeding structures for sliding structural bodies face issues such as increased size and weight, complex wire harness bending leading to durability concerns, and difficulty in absorbing redundant wire harness length, which restricts space and increases manufacturing costs.
Innovation Solution
A compact feeding structure featuring a protector base with a pivotally supported link arm and a torsion coil spring, where the wire harness is bent into a substantial S-shape, allowing for efficient absorption of redundant length and reduced stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire harness is laid from the link to the stationary portion through the slider while being bent into a U-shape, then the wire harness can be connected between moving and stationary parts, but the wire harness is bent at a small diameter in crossing portions which increases bending stress and deteriorates durability
Solution Approach 1:
The wire harness is configured to be bent into a substantial S-shape instead of a U-shape, creating larger radius curves that reduce bending stress. The S-shaped configuration with its gradual curves minimizes stress concentration points while maintaining the necessary connectivity between moving and stationary portions.
2Ease of operation
If conventional feeding structures are used with guide rails and links, then the wire harness can be fed during sliding motion, but the number and weight of parts increase and the structure occupies large space
Solution Approach 1:
The feeding structure merges the link arm and harness holder into a single integrated component that performs both mechanical linkage and wire harness support functions. This consolidation eliminates separate guide rails and multiple links, reducing part count and weight while maintaining the ability to feed the wire harness during sliding motion.
Solution Approach 2:
The link arm is designed as a multi-functional component that simultaneously provides mechanical support, enables sliding motion, and supports the wire harness through the integrated harness holder. This universal design allows a single structure to perform multiple functions that would traditionally require separate components.
3Adaptability or versatility
If the wire harness is laid along long and short links that rotate during door opening and closing, then the wire harness can accommodate the movement, but the wire harness is complicatedly bent at a small diameter which deteriorates durability
Solution Approach 1:
The wire harness is routed in an S-shaped configuration with large radius curves that accommodate the arc of motion during door opening and closing. This curved path allows the wire harness to flex naturally with the movement while maintaining large bend radii that prevent stress concentration and durability issues.
4Reliability
If a leaf spring and annular wall are used to support the wire harness in the protector, then the wire harness can be supported and minimum bend radius ensured, but the protector dimensions increase and occupies large area inside the slide door
Solution Approach 1:
The harness holder is integrated with the link arm structure, eliminating the need for separate leaf springs and annular walls within the protector. This integration maintains wire harness support and proper bend radius while significantly reducing the space required inside the slide door protector.
Solution Approach 2:
The wire harness is routed externally along the S-shaped path between the link arm and stationary portion, moving the wire harness support function from the internal protector space to the external linkage structure. This dimensional relocation frees up space within the protector while maintaining wire harness integrity.
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 S-shaped wire harness configuration enhances durability, reduces weight and manufacturing costs, and optimizes space usage, enabling smooth absorption of redundant length and easy insertion of electric wires.
Implementation Method 1
a torsion coil spring arranged around a shaft portion of the protector base; the torsion coil spring pushes the link arm
Data Source
AI summary
A feeding structure for a sliding structural body includes: a protector base arranged in one of the sliding structural body and a stationary structural body; a link arm pivotally supported by a shaft portion of the protector base; a harness holder pivotally connected to an end portion of the link arm; and a wire harness which is laid from one end of the protector base to the harness holder so as to be bent in a substantial S-shape, and laid from the harness holder to the other of the sliding structural body and the stationary structural body so as to be moved therebetween.