Integrated In-Wheel Motor Knuckle for Vibration-Stable Gear Alignment
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Solution Overview
Problem
The existing in-wheel motor units with separate knuckle and gear case configurations experience increased vibration, leading to deterioration of gear alignment and motor eccentricity due to increased shaking moment.
Innovation Solution
The integration of the gear case and knuckle in the in-wheel motor unit reduces the center of gravity and swing moment, thereby suppressing gear alignment deterioration and motor eccentricity by forming a single, unified component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the knuckle and gear case are separate bodies, then the ease of manufacture is improved, but the vibration of the gear case increases leading to deterioration of gear alignment
Solution Approach 1:
The patent integrates the knuckle and gear case into a single unified component. This merging eliminates the interface between separate parts, reducing relative vibration and shaking moment. The integrated structure ensures that the knuckle and gear case move as one rigid body, preventing the vibration-induced misalignment that occurs when they are separate components.
2Ease of operation
If the knuckle and gear case are separate bodies, then the ease of assembly is improved, but the shaking moment of the knuckle increases causing motor eccentricity
Solution Approach 1:
By combining the knuckle and gear case into one integrated component, the patent eliminates the separate assembly interface. This unified structure reduces the shaking moment that would otherwise cause motor eccentricity, while the motor is directly mounted to the integrated structure ensuring proper alignment.
3Device complexity
If the knuckle and gear case are separate bodies, then the device complexity is reduced, but the vibration increases leading to deterioration of alignment property
Solution Approach 1:
The patent resolves this contradiction by merging the knuckle and gear case into a single component. While this slightly increases manufacturing complexity compared to separate parts, it dramatically improves the stability of the alignment property by eliminating vibration-induced misalignment between the separate components.
Data Source
AI summary
The in-wheel motor unit includes a motor case, a gear case disposed adjacent to the motor case, and a knuckle integrally formed with the gear case.