Wire Harness Tape Wrapping for Provisional Shape Retention
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Solution Overview
Problem
Conventional wire harnesses struggle to maintain a provisional routing shape before assembly due to the superior restoring force of exterior members overholding power of the electric wires, causing the shape to be lost before assembly to the structure begins.
Innovation Solution
A wire harness design featuring a first tape wrapping body with a higher restoring force than holding power and a second tape wrapping body with a lower restoring force, allowing the electric wire to maintain the bending shape until assembly, using adhesive tapes with specific widths and wrap amounts to achieve this balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hard exterior member such as a corrugated tube is used to protect the electric wire, then protection from peripheral components is improved, but the ability to maintain provisional routing shape deteriorates because restoring force exceeds holding power
Solution Approach 1:
The wire harness is divided into multiple sections with different tape wrapping characteristics. The first wrapping section uses tape with high restoring force for shape maintenance, while the second wrapping section uses tape with low restoring force for flexibility. This segmentation allows different parts of the same wire harness to serve different functions.
Solution Approach 2:
Different wrapping sections are assigned different local qualities through varying tape specifications. The first wrapping section has tape with width and wrap amount configured for high restoring force, while the second wrapping section has tape configured for low restoring force. This local differentiation resolves the contradiction between shape maintenance and flexibility.
2Shape
If adhesive tape is wrapped around the electric wire to maintain bending shape, then provisional routing shape maintenance is improved, but the wire harness complexity increases due to multiple wrapping sections with different tape specifications
Solution Approach 1:
The wire harness is divided into multiple wrapping sections with different tape characteristics. This segmentation enables precise control of restoring force in different locations, allowing the harness to maintain complex three-dimensional routing shapes that would be impossible with uniform wrapping.
Solution Approach 2:
The tape parameters (width, wrap amount, material properties) are changed across different wrapping sections to achieve the desired restoring force distribution. By adjusting these parameters, the system can maintain various provisional shapes while managing the complexity through standardized parameter variations.
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 wire harness effectively maintains the provisional routing shape until assembly, ensuring that the electric wire remains in the desired configuration until integrated into the structure.
Implementation Method 1
first restoring force for restoring from a bending shape, which is formed by integrating the first tape wrapping body and the first electric wire portion in the first wrapping section, to a shape before bending
Data Source
AI summary
A wire harness includes: an electric wire; a first tape wrapping body in which a first adhesive tape is wrapped around a first electric wire portion of a first wrapping section directed to one side from a base point in an axial direction of the electric wire; and a second tape wrapping body in which a second adhesive tape is wrapped around a second electric wire portion of a second wrapping section directed to another side from the base point in the axial direction of the electric wire.