Slit-Free Wire Harness Vibration Suppression
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Solution Overview
Problem
Existing wire harness designs with corrugated tubes require a slit for vibration suppression members, leading to issues with moisture invasion, damage from flying debris, and increased insertion force due to reduced vibration suppression effectiveness and increased contact area.
Innovation Solution
A wire harness with a tubular exterior member having no slit, where vibration suppression members are inserted through openings and feature ribs on their outer surface to reduce relative vibration and prevent damage, allowing for easier insertion and fixation without requiring a large force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a slit is formed in the corrugated tube to insert the vibration suppression member, then the vibration suppression member can be installed, but moisture invasion and damage from flying debris cannot be avoided
Solution Approach 1:
The corrugated tube is divided into multiple bellows convex portions and bellows concave portions along its length. The vibration suppression member is segmented to fit within these corrugations, allowing insertion through the corrugated structure itself rather than requiring a slit in the tube wall.
Solution Approach 2:
The vibration suppression member is nested within the corrugated tube structure, specifically positioned within the bellows convex portions. This nested configuration allows the vibration suppression member to be installed without creating openings in the tube, maintaining the tube's protective function while achieving vibration suppression.
2Ease of operation
If the vibration suppression member is reduced in size to fit through the opening, then insertion becomes easier, but looseness increases and vibration suppression effectiveness decreases
Solution Approach 1:
The vibration suppression member incorporates a flexible rib structure that can dynamically adapt to the available space within the bellows convex portions. The ribs can flex and deform to navigate through the corrugated tube opening while maintaining contact with the inner wall, ensuring both easy insertion and effective vibration suppression without requiring the member to be permanently reduced in size.
Data Source
AI summary
A wire harness includes a tubular shaped exterior member, a conductive path protected by the exterior member, and a vibration suppression member post-fitted to the conductive path and disposed inside the exterior member. The exterior member is formed into a shape having no slit. Ribs are formed in an outer circumferential surface of the vibration suppression member so as to be disposed at circumferential intervals. The rib is formed into a shape in which a front end surface thereof in a protruding direction thereof protrudes to a position near an inner surface of the exterior member or to a position contacting the inner surface.