Wire Harness Positioning Member for EMI Absorber Vibration
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Solution Overview
Problem
Conventional wire harnesses with electromagnetic wave absorbing members are prone to vibration, which can damage the wires due to the larger size of the absorbing members required to effectively reduce electromagnetic waves, leading to potential wire damage from contact with the absorbing member's edges during vehicle travel.
Innovation Solution
A wire harness design featuring a tubular first outer cover, a positioning member made of synthetic resin, and a ring-shaped electromagnetic wave absorber with a through hole, where the positioning member is interposed between the wire and the absorber's inner surface to prevent direct contact and vibration-induced damage, and adjustable to maintain positional alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large electromagnetic wave absorbing member is used to effectively reduce electromagnetic waves, then the electromagnetic wave reduction effect is improved, but the size of the absorbing member increases causing vibration and wire damage
Solution Approach 1:
The patent introduces a positioning member made of soft rubber as an intermediary between the wire and the electromagnetic wave absorbing member. This positioning member has a through-hole that accommodates the wire, preventing direct contact between the wire and the absorbing member's inner surface. The soft rubber material absorbs vibration from the large absorbing member, eliminating the wire damage risk while maintaining the electromagnetic wave reduction effect.
2Object-affected harmful factors
If a large electromagnetic wave absorbing member is used, then the electromagnetic wave reduction effect is improved, but the positioning and alignment difficulty increases
Solution Approach 1:
The positioning member serves as a mediator that simplifies assembly. It features a through-hole for wire insertion and an outer surface that contacts the electromagnetic wave absorbing member, providing automatic positioning and alignment during assembly. This intermediary component makes it easier to assemble large absorbing members while maintaining proper positioning.
3Reliability
If a positioning member is introduced between the wire and absorber, then wire protection is improved, but the device complexity increases
Solution Approach 1:
The positioning member is designed with multi-functionality to reduce overall device complexity. It simultaneously provides wire protection through its soft rubber material, positioning and alignment through its geometric features (through-hole and outer surface), and vibration damping. By combining multiple functions in a single component, the overall structural complexity is minimized.
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
The solution effectively reduces wire damage by preventing contact with the absorber's edges and allows for easy assembly and alignment, stabilizing the electromagnetic wave absorber and reducing positional misalignment, thus enhancing the durability and assembly of the wire harness.
Implementation Method 1
electromagnetic wave absorbing members that absorb electromagnetic waves (electromagnetic noise) emitted from the wires
Data Source
AI summary
A wire harness including: a wire; a tubular first outer cover accommodating the wire; a positioning member that is made of a synthetic resin and is attached to an end of the first outer cover; and a ring-shaped electromagnetic wave absorber that has a through hole through which the wire passes and is fixed to the positioning member, wherein the positioning member has a main body including an insertion portion inserted into the through hole, and a fitting portion that protrudes from an end of the main body and is fitted on the end of the first outer cover.