Snaked Wire Harness Outer Member Vibration Damping

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Solution Overview

Problem

Wire harnesses in automobiles experience shaking of conductive paths due to vibrations, leading to potential damage from the covering hitting the inner surface of the outer member, particularly in straightly routed portions.

Innovation Solution

A routing configuration where the tubular outer member is snaked to contact the conductive paths in straight wiring portions, with fixing members maintaining this posture to prevent shaking, utilizing existing clamps without new components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the wire harness is routed straightly in the outer member, then the routing is simple and easy to install, but the conductive path shakes due to vibration and the covering may hit the inner surface of the outer member causing damage

Engineering Contradiction:

Improverouting simplicityVSAvoidconductive path stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The outer member is configured to snake in a curved or wavy pattern rather than running straight, creating contact points between the outer member and conductive path that suppress shaking while maintaining routing simplicity

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The snaking configuration of the outer member creates a dynamic structure that adapts to vibrations, allowing the outer member to move slightly with the conductive path while maintaining contact to prevent excessive shaking

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If the conductive path is allowed to move freely in the outer member, then the installation is easier, but the covering of the conductive path may be damaged by strong contact with the inner surface of the outer member during vibration

Engineering Contradiction:

Improveinstallation easeVSAvoidvibration-induced damage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The snaking configuration provides gentle curved contact surfaces that distribute contact forces, preventing concentrated impacts that could damage the conductive path covering while still allowing easy installation

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS9963091B2Routing configuration of wire harness

Publication Date: 2018.05.08 YAZAKI CORP

AI summary

A routing configuration of a wire harness includes an outer member having a tubular shape, and at least one conductive path configured to be contained in and protected by the outer member. In a generally straight wiring portion, the wire harness is routed in such a manner that the outer member is snaked so that portions of an inner surface of the outer member are brought into contact with the at least one conductor path, the generally straight wiring portion being defined as a portion where the wire harness is routed generally straightly between bent wiring portions which are defined as portions where the wire harness is routed being bent so as to conform to shapes of corresponding portions of a routing target, respectively.