Electric Vehicle Swing Arm Harness Routing via Guide Hole
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Solution Overview
Problem
Existing electric vehicle drive devices require additional components or increased harness length to prevent interference with vehicle body components when the swing arm swings, which affects aesthetics and functionality.
Innovation Solution
The electric vehicle drive device incorporates a guide hole between the pivot shaft and cross arm portion, allowing the harness to pass through and be fixed at strategic points, preventing interference with vehicle body components and enhancing aesthetics by minimizing visible harness exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the harness is extended to avoid interference with vehicle body components, then the harness does not interfere with components, but the harness length is increased
Solution Approach 1:
The patent utilizes the vehicle width direction as an additional spatial dimension to route the harness. By forming a guide hole penetrating the wall in the vehicle width direction and routing the harness through this hole, the harness is redirected into the third dimension (width direction) rather than extending in the front-rear direction, thereby avoiding interference with vehicle body components while maintaining appropriate length
Solution Approach 2:
The harness is routed through the guide hole formed within the wall structure of the swing arm. This nesting approach allows the harness to pass through the existing structural space of the swing arm rather than extending externally, eliminating the need for additional separate components while preventing interference with vehicle body components
2Object-affected harmful factors
If an extension cover is provided to guide the harness, then the harness does not interfere with vehicle body components, but the device complexity is increased
Solution Approach 1:
The patent merges the harness guidance function into the existing wall structure of the swing arm by forming a guide hole directly in the wall. This integration eliminates the need for a separate extension cover component, reducing device complexity while still achieving the goal of preventing harness interference with vehicle body components
Solution Approach 2:
The wall structure of the swing arm serves multiple functions: it provides structural support for the swing arm and simultaneously guides the harness through the formed guide hole. This multi-functionality eliminates the need for dedicated separate components for harness routing, thereby reducing overall device complexity
Data Source
AI summary
An electric vehicle drive device includes a swing arm including an arm portion disposed on a left side, having a front part pivotally supported by a pivot shaft, and including a main wall having a height and extending in a front-rear direction, and a cross arm portion which has a front part pivotally supported by the pivot shaft, and including a coupling portion extending toward the left side to the main wall. A guide hole penetrating through the main wall in a vehicle width direction is formed between a part pivotally supported by the pivot shaft and a part in which the coupling portion extends. A harness extends along a side of the main wall on the left side, passes through the guide hole, and extends along the cross arm portion.