Wire Harness Designing Device Sub-Harness Optimization
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Solution Overview
Problem
The complexity of wire harness structures in vehicles, resulting from bundling multiple electric wires, leads to increased production time and cost, as well as reduced efficiency in wiring due to the weight and complexity of the harnesses, especially in applications like train vehicles.
Innovation Solution
A wire harness designing device and method that utilize a track record database to identify and present existing wire harness structures similar to the designed harness, allowing for the division into sub-harnesses, which can be optimized for reduced production and wiring time by sorting based on production and wiring times, thereby improving efficiency and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all electric wires with common wiring paths are bundled together to form one wire harness, then wiring efficiency is improved, but the structure becomes too complex and production time increases
Solution Approach 1:
The patent divides a large wire harness into multiple sub-harnesses based on wiring paths and connection points. Each sub-harness contains a specific group of electric wires, making the overall structure more manageable. This segmentation reduces the complexity of the main wire harness while maintaining efficient wiring through coordinated installation of multiple smaller units.
2Productivity
If the number of electric wires in a wire harness is increased, then wiring efficiency is improved, but the wire harness becomes too heavy
Solution Approach 1:
The wire harness is divided into multiple sub-harnesses, each containing a manageable number of electric wires. This prevents any single harness from becoming excessively heavy while still achieving comprehensive wiring coverage through the combination of multiple sub-harnesses installed in coordination.
3Adaptability or versatility
If wire harness design is made empirically by designer, then adaptability is improved, but design quality varies and production time increases
Solution Approach 1:
The patent incorporates a evaluation unit that assesses wire harness designs based on multiple criteria including wiring path length, number of connection points, and structural complexity. This feedback mechanism provides objective evaluation of design quality, enabling consistent optimization without relying solely on designer experience, thereby reducing production time while maintaining high design quality.
Data Source
Figure 1
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Figure 3A~3B
AI summary
A wire harness designing device includes a track record database including structure data for existing wire harnesses, and configured to identify a total production or wiring time of each existing wire harness, and a structure of each sub harness resulting from dividing the wire harness, an input section configured to receive specification data including structure data for the wire harness to be designed on the basis of a wiring layout, an extraction section configured to look up the track record database on the basis of the structure data input in the input section, and extract the existing wire harnesses being close in structure to the wire harness to be designed, and a presentation section configured to present the existing wire harnesses extracted by the extraction section in order of the total production or wiring times of the existing wire harnesses, and configured to present the structures of the sub harnesses.