Bracket-Equipped Conductive Path Stress Concentration
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Solution Overview
Problem
Existing methods for attaching metal brackets to wire harnesses in vehicles can concentrate stress on electrical wires, particularly when bent, due to the use of tubular metal components that may crush or restrict the wires, leading to potential deformation and increased curvature.
Innovation Solution
A conductive path with a resin molded body surrounding coated wires and a bracket with a base portion embedded in the resin, where the base portion is oriented parallel to the conductive path, reducing direct stress and allowing for flexible bending without deformation restriction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a tubular metal bracket portion is used to fix the wire harness, then the bracket can be firmly attached to the wire harness, but stress concentrates on the core wires causing deformation and increased curvature
Solution Approach 1:
The patent introduces a resin molded body as an intermediary between the metal bracket and the wire harness. The resin molded body surrounds the wire harness and distributes the clamping force, preventing direct contact between the metal bracket and core wires. This mediator eliminates stress concentration while maintaining firm attachment through the resin-bracket interface.
2Strength
If the base portion of the bracket faces the conductive path main body in a direction orthogonal to the thickness direction, then the fixing strength may be increased, but the diameter of the resin molded body increases
Solution Approach 1:
The patent changes the orientation of the bracket's base portion from a radial direction (orthogonal to thickness) to an axial direction (parallel to thickness). This dimensional reorientation allows the bracket to achieve effective clamping through the resin molded body without requiring a larger radial diameter, thus reducing the overall diameter of the resin molded body while maintaining fixing strength.
Data Source
AI summary
An object is to suppress concentration of stress on electrical wires when the electrical wires are bent in the vicinity of a bracket. A bracket-equipped conductive path includes a conductive path main body that is constituted by a plurality of coated wires, a protector that surrounds the conductive path main body, and a bracket that is made of metal and includes a base portion that is embedded in the protector in such a manner that detachment of the base portion from the protector is restricted and an attachment portion that extends from the base portion. The base portion has a flat plate shape and is arranged to face the conductive path main body in a direction that is substantially parallel to a thickness direction of the base portion.