Shielded Wire Harness Covering for Waterproof Routing
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Solution Overview
Problem
Conventional wire harnesses face challenges in ease of installation and waterproof performance due to moisture ingress through openings in protective jackets or sheaths, and the difficulty in routing electric and ground wires with different connection points.
Innovation Solution
A wire harness design featuring a sheath covering electric wires, a shield conductor interposed between the wires and the sheath, a ground wire connected to the shield conductor, and a covering body that collectively covers the wires and ground wire, fixing their extending directions to facilitate installation and enhance waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover portion is formed by winding vinyl tape to cover openings and wires, then waterproof performance is improved, but routing difficulty increases due to different connection points of insulated wire and ground wire
Solution Approach 1:
The patent combines the insulated wire and ground wire into a single integrated structure where both wires extend from the same opening in the protective jacket. This merging allows a single cover portion to seal both wires together, maintaining waterproof performance while simplifying routing operations.
Solution Approach 2:
The ground wire is preliminarily arranged to extend from the protective jacket in the same direction as the insulated wire before the cover portion is formed. This preliminary positioning ensures that when the cover portion is created, both wires are already aligned for easy routing, eliminating the need for complex post-assembly adjustments.
2Reliability
If separate cover portions are formed for insulated wire and ground wire to achieve waterproofing, then waterproof performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the sealing of the insulated wire and ground wire into a single integrated cover portion rather than using separate cover portions for each wire. This reduces structural complexity while maintaining effective waterproofing at both connection points.
Solution Approach 2:
The single cover portion serves multiple functions: it seals the opening of the protective jacket and simultaneously covers both the insulated wire and ground wire. This multi-functionality eliminates the need for separate cover portions, reducing overall structure complexity while maintaining comprehensive waterproof protection.
Data Source
AI summary
A wire harness includes a plurality of electric wires, a sheath that covers a portion of the plurality of electric wires in a longitudinal direction, a shield conductor that is interposed between the plurality of electric wires and the sheath and covers all of the plurality of electric wires, a ground wire connected to the shield conductor, and a covering body that covers an outer circumference of the shield conductor and the plurality of electric wires extending out of an end of the sheath, as well as the end of the sheath and a portion of the ground wire, wherein extending directions of the plurality of electric wires and the ground wire from the covering body are fixed by the covering body.