Wire Harness Attachment Structure for Vibration-Looseness Suppression
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Solution Overview
Problem
Conventional wire harnesses face looseness issues due to vibration, which can cause damage at the attachment area, particularly where the path-restricting members are attached.
Innovation Solution
A wire harness design featuring a first path restrictor with an orthogonal insertion opening, an attachment member with a receiver and lid that covers the path restrictor, and a suppression member to prevent separation of the lid from the receiver, ensuring the path restrictor is held from opposite sides, thereby suppressing looseness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the path-restricting member is attached to another path-restricting member, then the path restriction function is enhanced, but the attachment area becomes loose due to vibration
Solution Approach 1:
The attachment member is nested within the attachment area of the first path-restricting member, with the receiver portion inserted into the attachment area and the lid covering the outer peripheral surface. This nested structure ensures that the attachment member is securely held without causing looseness, while still providing enhanced path restriction function.
Solution Approach 2:
The suppression member is specifically positioned at the suppression position where the lid and receiver portion may separate, providing localized reinforcement only where needed. This prevents looseness at the critical attachment area without affecting the overall flexibility or function of the path-restricting members elsewhere.
2Reliability
If the attachment member is securely fixed to prevent looseness, then attachment stability is improved, but the device complexity increases
Solution Approach 1:
The lid functions as a flexible cover that can elastically deform during attachment and then return to its original shape to secure the attachment member. This flexible shell approach provides secure fixation without requiring complex rigid fastening mechanisms, multiple fasteners, or intricate assembly structures.
Solution Approach 2:
The suppression member is designed to automatically suppress separation of the lid and receiver portion when relative movement occurs. The suppression position and suppression member work together to provide self-correcting behavior, eliminating the need for additional active control mechanisms or complex locking systems.
Data Source
AI summary
A wire harness including: a wire harness body having an electric wire and a cover covering a periphery of the electric wire; a first path restrictor attached to a periphery of the cover and restricting a path of the wire harness body; and an attachment attached to a periphery of a portion of the first path restrictor in a lengthwise direction thereof.