Wire Harness Interposed Member for Heat Shrinkable Tube Protection
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Solution Overview
Problem
Heat shrinkable tubes in wire harnesses can be damaged and torn due to direct contact with the edges of connection parts, particularly at corners, leading to seal integrity issues.
Innovation Solution
An interposed member with a circular or irregular cross-section is placed between the connection parts and the heat shrinkable tube, preventing direct contact and reducing the risk of damage by providing a surface for the tube to adhere to, while maintaining the shape and reducing the radial size of the wire harness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat shrinkable tube is in intimate contact with the connection part to ensure sealability, then the sealability is improved, but the heat shrinkable tube is prone to being torn by the edges of the connection part
Solution Approach 1:
A resin-coated portion is applied to the connection part, creating an intermediary layer between the heat shrinkable tube and the sharp edges of the connection part. This resin layer acts as a mediator that prevents the tube from being torn while maintaining intimate contact for sealing purposes.
Solution Approach 2:
The resin-coated portion is applied in advance to the connection part before the heat shrinkable tube is installed. This beforehand cushioning protects the tube from potential damage by providing a protective layer that absorbs the stress concentration at the edges.
2Strength
If the connection part is made wider to ensure connection strength, then the connection strength is improved, but the radial size of the wire harness increases
Solution Approach 1:
The resin coating changes the effective parameters of the connection part by adding a protective layer that allows the tube to conform to the connection part's shape without being damaged by sharp edges, enabling strong connections without increasing the base dimensions.
Solution Approach 2:
The heat shrinkable tube, as a flexible shell, is enabled to closely conform to the connection part's outer shape through the resin-coated portion, ensuring intimate contact and sealing while preventing damage from sharp edges.
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 solution effectively prevents tears in the heat shrinkable tubes, ensures electrical insulation, and minimizes the radial expansion of the wire harness, thereby enhancing the sealability and durability of the connection parts.
Implementation Method 1
heat shrinkable tubes serving as adhered members. By the three conductive wires being individually inserted into the heat shrinkable tubes
Data Source
AI summary
A wire harness, including: a first conductor including a first connection; a second conductor including a second connection that is connected to the first connection; an adhered member that is disposed on an outer circumference of a connection part between the first connection and the second connection; and an interposed member that is interposed between the connection part and the adhered member, the adhered member being adhered on an outer circumferential surface of the interposed member, wherein the interposed member has rigidity to maintain a certain shape.