Slide Door Wire Harness Routing to Prevent Link Mechanism Overload
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Solution Overview
Problem
Conventional wire harnesses in vehicles face issues with overload due to excessive bending when routed through a link mechanism between a slide door and a vehicle body, which can lead to damage.
Innovation Solution
A wire harness design incorporating a harness body with multiple routed portions and a harness guide tool that allows the harness to follow the movement of a link mechanism without overload by guiding and fixing portions to prevent relative displacement, utilizing rotation shafts and harness fixing tools to manage the routing path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the harness body is routed along the link mechanism to follow its movement, then the wire harness can maintain electrical connectivity during slide door operation, but excessive bending occurs causing overload on the harness body
Solution Approach 1:
The harness body is divided into multiple routed portions (first, second, and third routed portions) that are separately routed through different paths. The first routed portion is routed in the link mechanism, the second routed portion is routed on the first coupling target side, and the third routed portion is routed on the second coupling target side. This segmentation allows each portion to handle specific movement and deformation requirements, preventing excessive bending stress on any single portion while maintaining overall electrical connectivity.
Solution Approach 2:
A harness guide tool is introduced as an intermediary component to restrict and guide the routing path of the third routed portion. The guide tool includes a guide hole through which the third routed portion passes, constraining its movement to a safe path that avoids excessive bending. This intermediary structure mediates between the link mechanism movement and the harness body, ensuring the harness follows a protected trajectory that maintains connectivity without causing mechanical overload.
2Reliability
If the harness body follows the link mechanism movement, then electrical connectivity is maintained, but the routing path becomes complex increasing the risk of overload
Solution Approach 1:
The complex routing path is segmented into three distinct portions, each with a specific function and trajectory. The first routed portion handles the link mechanism integration, the second routed portion manages the first coupling target side routing, and the third routed portion handles the second coupling target side routing. This segmentation simplifies the overall complexity by breaking down the complex path into manageable, functionally-defined segments that can be independently optimized and installed.
Solution Approach 2:
The harness guide tool acts as an intermediary that simplifies the complex routing of the third routed portion. By providing a defined guide hole path, the tool constrains the harness to a predetermined safe trajectory, eliminating the need for complex free-form routing calculations and reducing installation complexity. The guide tool mediates between the complex link mechanism movement and the harness routing, providing a simplified, protected path.
Data Source
AI summary
A harness body includes a first routed portion routed to an other end portion of a first arm member on a first coupling target side and a third routed portion guided toward a fixed portion on a second coupling target side by a harness guide tool and having a fixing portion fixed to the fixed portion, a link mechanism includes a second arm member including an other end portion relatively rotatably coupled to the other end portion of the first arm member via a second rotation shaft, and the third routed portion is bent and deformed between the harness guide tool and the fixing portion when the first arm member is relatively rotated about an axis of a first rotation shaft or when the second arm member is relatively rotated about an axis of a third rotation shaft with respect to the second coupling target.