Driving Apparatus Radial Size Reduction via Stator Rod Routing
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Solution Overview
Problem
Existing in-wheel motor driving apparatuses face challenges in reducing size and weight while maintaining efficient power transmission and braking capabilities.
Innovation Solution
The driving apparatus incorporates a motor with a clutch mechanism and a brake mechanism, where the operation rods of these mechanisms pass through the stator portion of the motor, allowing for a compact design by overlapping the power transmission components and optimizing the layout to reduce radial size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the operation rods of the clutch mechanism and brake mechanism are arranged outside the motor, then the mechanisms can operate independently, but the radial size of the driving apparatus increases
Solution Approach 1:
The operation rods of the clutch mechanism and brake mechanism are arranged to pass through the stator portion of the motor, nesting the control mechanisms within the motor's radial space. This eliminates the need for separate external rod arrangements and reduces the overall radial dimension of the driving apparatus while maintaining independent operation of both mechanisms
Solution Approach 2:
The operation rods are routed through the axial dimension of the stator portion rather than extending radially outward. By utilizing the axial space and passing rods through the stator, the design transforms a radial layout problem into an axial routing solution, thereby reducing radial size without compromising mechanism functionality
2Volume of moving object
If the operation rods pass through the stator portion, then the radial size is reduced, but the stator structure becomes more complex
Solution Approach 1:
The stator portion is designed to serve dual functions: generating electromagnetic fields for motor operation and providing passageways for the clutch and brake operation rods. By making the stator multi-functional, the design avoids adding separate structural elements, thereby reducing manufacturing complexity while achieving compact radial dimensions
Data Source
AI summary
A driving apparatus 100 includes a motor 20 that generates drive power and power transmission units 30, 40, and 50 that transmit drive power of the motor 20 to an output shaft 60. The power transmission units 30, 40, and 50 include at least one of a clutch mechanism 30 that switches between a state where the motor 20 and the output shaft 60 are connected and a state where the motor 20 and the output shall 60 are disconnected, in accordance with movement of an operation rod 32, and a brake mechanism 40 that brakes rotation of the output shaft 60 in accordance with movement of an operation rod 43.