Wire Harness Segmented Metal Pipes Heat Dissipation
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Solution Overview
Problem
Conventional wire harnesses with a shielding function face challenges in heat interference between electric wires due to their configuration, which can lead to heat degradation, especially when multiple wires are inserted through a metal pipe together, making it difficult for Joule heat to dissipate effectively.
Innovation Solution
A wire harness design featuring multiple tubular metal pipes with bellows-shaped or braided metal connecting portions that allow each electric wire to be inserted separately, providing a shielding function while allowing for flexible routing and reducing heat interference by maintaining a non-contact configuration between wires, and using a conductive binding member for attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple electric wires are inserted through a single metal pipe together, then the shielding process workability is improved, but heat interference occurs between the electric wires
Solution Approach 1:
The invention divides a single common pipe into multiple separate metal pipes, with each electric wire inserted through its own dedicated pipe. This segmentation isolates the electric wires from each other, preventing heat interference while maintaining the shielding function. The separate pipes can still be bundled together to achieve the desired routing configuration.
2Reliability
If electric wires are sealed in the hollow portion of the metal pipe, then the shielding function is enhanced, but heat dissipation becomes more difficult
Solution Approach 1:
By providing separate metal pipes for each electric wire instead of a single common pipe, the invention allows each wire to have its own thermal pathway. The gaps between adjacent separate pipes create channels for heat dissipation, preventing heat accumulation while maintaining the shielding effect of each individual pipe.
3Reliability
If a rigid metal pipe is used for shielding, then the shielding function is effective, but flexibility and ease of routing are reduced
Solution Approach 1:
The invention employs metal pipes with corrugated or bellows-shaped configurations that provide both shielding effectiveness and flexibility. These flexible metal pipes can be bent and routed along complex paths while maintaining their shielding function, unlike rigid pipes that would require additional bending tools and procedures.
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 suppresses heat interference between electric wires, enhances electromagnetic noise shielding, reduces the need for additional fixing tools, and simplifies the manufacturing process by allowing flexible deformation and easier installation, while maintaining a lightweight and cost-effective design.
Implementation Method 1
a shielding member having a function of blocking electromagnetic noise
Implementation Method 2
Joule heat generated in each of the electric wires due to an electric current flowing through each of the plurality of electric wires
Data Source
AI summary
A wire harness includes a plurality of electric wires, a plurality of tubular metal pipes corresponding the number to the plurality of electric wires, each of the plurality of electric wires being inserted through respective one of the plurality of tubular metal pipes, a connector configured to be connected to end portions of the plurality of electric wires, and a tubular metal connecting portion provided at a pipe end portion of each of the plurality of pipes and connected to the connector. Each of the pipes has a rigidity capable of self-holding a bent shape thereof when each of the pipes are bent. The connecting portion has a flexibility incapable of self-holding a bent shape thereof when the connecting portion is bent.