Wire Harness Tolerance Absorbing Part for Position Shifts
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Solution Overview
Problem
When devices such as motors and inverters are closely mounted, the high rigidity of wire harnesses can make it difficult to absorb position shifts or dimensional tolerances, leading to potential electrical connection issues.
Innovation Solution
Incorporating a tolerance absorbing part in the conductor body of the wire harness, which can displace in X, Y, and Z directions, and is formed into shapes like mountains, waves, or twisted configurations, with slits to reduce rigidity and facilitate displacement, while being protected by a mold part with insulation and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the motor and inverter are closely mounted to shorten the harness body length, then the length of the wire harness is reduced, but the rigidity of the wire harness becomes excessively high
Solution Approach 1:
The wire harness is divided into multiple sections with different rigidity characteristics. The first wire harness section has higher rigidity for stable connection, while the second wire harness section has lower rigidity to provide flexibility and absorb position shifts, allowing the harness to adapt to closely mounted devices without excessive overall rigidity
Solution Approach 2:
Different sections of the wire harness are designed with different rigidity properties to fulfill different functional requirements. The connection portions require high rigidity for stability, while the intermediate portions require low rigidity for flexibility, creating local quality variations that resolve the contradiction between length reduction and rigidity control
2Stability of the object's composition
If the rigidity of the wire harness is made very high for structural stability, then the strength and stability of the wire harness is improved, but the ability to absorb position shifts and dimensional tolerances deteriorates
Solution Approach 1:
The wire harness is segmented into high-rigidity connection sections and low-rigidity intermediate sections. This segmentation allows the harness to maintain stability at connection points while absorbing position shifts and dimensional tolerances in the intermediate portions, simultaneously achieving both stability and adaptability
Solution Approach 2:
The rigidity parameter is varied along the length of the wire harness, with higher rigidity at connection points and lower rigidity in intermediate sections. This parameter change enables the harness to maintain structural stability where needed while providing flexibility to absorb position shifts and dimensional variations
Data Source
AI summary
A wire harness which can absorb a position shift or a dimensional tolerance related to mounting or the like sufficiently is provided. A wire harness (21) includes a harness body (22), a motor side connector (23) provided at one end of the harness body (22), and an inverter side connector (24) provided at the other end of the harness body (22). The harness body (22) includes high voltage conduction paths (25), and an electromagnetic shielding member (26) which collectively covers the high voltage conduction paths (25). The high voltage conduction path (25) includes a conductor body (27), connecting parts (28, 29) and a mold part (30). The conductor body (27) is provided with a tolerance absorbing part (31).