Wire Harness with Alternating Elastic Insertion Parts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wire harnesses with tubular exterior members suffer from vibration-induced damage to the conduction paths' coatings due to car vibrations, as reducing the exterior member's diameter or adding inclusions complicates path insertion and can cause coating wear.
Innovation Solution
A wire harness design featuring a tubular exterior member with alternating fixed and elastically deformable narrow-width insertion parts, where the fixed parts allow smooth insertion and the deformable parts suppress vibrations by returning to their original shape to press the conduction paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inside diameter of the exterior member is reduced or an inclusion is provided to eliminate clearance, then vibration suppression is improved, but insertion workability deteriorates and coating damage risk increases
Solution Approach 1:
The exterior member is segmented into multiple insertion parts along its length, with alternating wide and narrow sections. This segmentation allows different regions to serve different functions: wide sections facilitate easy insertion while narrow sections provide vibration suppression, resolving the contradiction between insertion workability and vibration control.
Solution Approach 2:
Different sections of the exterior member are given different local qualities - some sections have larger inside diameters for easy insertion while others have smaller inside diameters for vibration suppression. This local differentiation allows each section to optimize for its specific function without compromising the other.
2Object-affected harmful factors
If the inside diameter of the exterior member is reduced to suppress vibration, then coating protection is improved, but insertion difficulty increases
Solution Approach 1:
The exterior member is divided into alternating wide and narrow insertion parts, allowing the conduction path to be inserted easily through wide sections while narrow sections provide coating protection through controlled contact and vibration suppression.
Solution Approach 2:
The exterior member incorporates elastic narrow insertion parts that can dynamically adjust - deforming during insertion to accommodate the conduction path, then returning to their original shape to provide consistent vibration suppression and coating protection.
3Reliability
If narrow-width insertion parts are made elastically deformable to suppress vibration, then vibration control is improved, but structural complexity increases
Solution Approach 1:
The elastic properties of the narrow insertion parts are achieved by controlling material parameters and geometric dimensions during manufacturing, rather than adding complex mechanical components. This allows vibration control functionality to be built into the basic structure through parameter optimization.
Solution Approach 2:
The exterior member uses flexible elastic materials for the narrow insertion parts, allowing them to deform and return to their original shape. This flexible shell approach provides vibration control functionality without requiring complex rigid mechanical structures.
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
This design effectively reduces vibrations of the conduction paths, prevents coating damage, and enhances insertion workability by allowing elastic deformation only where necessary.
Implementation Method 1
a plurality of narrow-width insertion parts which are elastically deformable and in which an inside width is narrower than an outside width of the one or the plurality of conduction paths
Data Source
AI summary
A wire harness includes a tubular external member and one or a plurality of conduction paths inserted into the external member and protected by the external member. The external member includes at least one fixed form insertion part in which an inside width is wider than an outside width of the one or the plurality of conduction paths, and a plurality of narrow-width insertion parts which are elastically deformable and in which an inside width is narrower than the outside width of the one or the plurality of conduction paths. The plurality of narrow-width insertion parts are arranged along a tube axial direction alternately and integrally with the at least one fixed form insertion part.