Segmented Wire Harness Resin-Molded Fixing Portions
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Solution Overview
Problem
Existing wire harness designs with integrally formed wire fixing and bracket attachment portions complicate wiring work, particularly when routing electric wires after attaching the bracket to a vehicle body.
Innovation Solution
A wire harness with a resin-molded wire fixing portion and fixing member attaching portion that are spaced apart in the cable's longitudinal direction, allowing for relative movement due to the cable's flexibility, facilitating easier routing and attachment to a vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the wire fixing portion and bracket attachment portion are integrally formed, then manufacturing complexity is reduced, but wiring work becomes difficult when routing electric wires after attaching the bracket to the vehicle body
Solution Approach 1:
The patent divides the wire fixing portion and bracket attachment portion into separate components that are not integrally formed. This segmentation allows the bracket to be attached to the vehicle body first, and then the wire fixing portion can be separately positioned and adjusted to facilitate easier wiring work, while still maintaining manufacturing efficiency through standardized separate parts.
2Ease of operation
If the wire fixing portion and fixing member attaching portion are spaced apart, then relative movement is enabled for easier routing, but structural integrity may be compromised
Solution Approach 1:
The patent utilizes the flexibility of the cable itself between the wire fixing portion and fixing member attaching portion to enable relative movement. The cable acts as a flexible connector that allows routing adjustments while maintaining structural integrity, eliminating the need for rigid mechanical connections between the spaced-apart components.
3Reliability
If the wire fixing portion covers the end portion of the sheath and electric wires, then water tightness is improved, but access to electric wires for routing becomes more difficult
Solution Approach 1:
The patent allows the electric wires to extend out of the sheath before the wire fixing portion is fully installed or sealed. This preliminary routing action enables workers to access and route the wires through the wheel-well area first, and then the wire fixing portion can be applied to seal and protect the connections, ensuring both ease of operation and water tightness.
Data Source
AI summary
A wire harness includes a cable that includes a plurality of electric wires and a sheath covering the electric wires, a wire fixing portion that is formed to cover an end portion of the sheath and the electric wires extending out of the end portion of the sheath and fixes the extending directions of the electric wires, and a fixing member attaching portion to which a fixing member used for fixing the cable to a fixing target is attached. The wire fixing portion and the fixing member attaching portion are formed by resin-molding. The wire fixing portion and the fixing member attaching portion are spaced apart from each other in a cable longitudinal direction. The wire fixing portion is relatively movable with respect to the fixing member attaching portion due to flexibility of the cable between the wire fixing portion and the fixing member attaching portion.