Wire Harness Fixing Structure With Through-Hole Silencer Attachment
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Solution Overview
Problem
Existing techniques for fixing a wire harness as a separated body to a silencer in vehicles require insert-molding, which is complex and can compromise acoustic insulation.
Innovation Solution
A wire harness fixing structure that includes a silencer between a floor mat and a vehicle body, with a wire harness disposed along the silencer's surface, and a fixing member with tag pin-like components that pass through the silencer, providing locking parts and a connection part to securely attach the wire harness while minimizing the reduction in acoustic insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insert-molding is used to fix the wire harness to the silencer, then the wire harness can be securely fixed, but the manufacturing process becomes complex and acoustic insulation is compromised
Solution Approach 1:
The invention separates the wire harness and silencer into independent components that are assembled together using a fixing member with locking parts, rather than using insert-molding to integrate them into a single piece. This segmentation allows for simple assembly while maintaining secure fixation.
Solution Approach 2:
The fixing member is prepared in advance with locking parts that engage with the silencer and wire harness, allowing for quick assembly without complex manufacturing processes. The locking parts are designed to be inserted and locked into position before final assembly.
2Reliability
If insert-molding is used to fix the wire harness to the silencer, then the wire harness can be securely fixed, but acoustic insulation performance is reduced
Solution Approach 1:
The fixing member is designed with locking parts that are localized to specific positions on the silencer, allowing the majority of the silencer surface to maintain its acoustic insulation properties. The fixing is achieved at discrete points rather than requiring extensive modification of the silencer structure.
Solution Approach 2:
The fixing member acts as an intermediary component between the silencer and wire harness, providing a secure connection without requiring direct integration that would compromise the silencer's acoustic insulation. The locking parts mediate the connection while preserving the integrity of both components.
3Ease of manufacture
If a fixing member is passed through a through hole in the silencer, then the wire harness can be fixed, but the through hole may reduce acoustic insulation
Solution Approach 1:
The through hole is created at a localized position on the silencer that minimizes impact on overall acoustic insulation. The locking parts are designed to engage at this specific location, concentrating the structural modification to the smallest necessary area.
Solution Approach 2:
The fixing member may incorporate materials with different properties to balance structural strength and acoustic insulation. The locking parts are designed to provide secure fixation while minimizing disruption to the silencer's acoustic properties.
Data Source
AI summary
A wire harness fixing structure includes; a silencer disposed between a floor mat and a body in a vehicle; a wire harness disposed along a main surface of the silencer; and fixing member fixing the wire harness to the silencer while being passed through a through hole formed to pass through the silencer in a thickness direction. An inner peripheral surface of the through hole in the silencer is closely attached to the fixing member.