Compact Speed Reduction Apparatus with Radially Nested Gears
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing combinations of motors and reducers require a large volume to achieve high torque output, leading to increased size and inefficiencies in compact designs, such as axial thickness and diameter, which hinders the development of compact and high-capability electromechanical devices.
Innovation Solution
A speed reduction apparatus is designed with a dual-rotor motor where two bearings are arranged on the same side of the stator in an axial direction, and the gears of the reducer are positioned radially outer to the bearings, allowing for a compact axial and radial arrangement, reducing the overall volume while maintaining high driving capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a motor and reducer are combined in series in the axial direction, then the driving capability is improved, but the axial thickness is increased
Solution Approach 1:
The invention transitions from a purely axial series arrangement to a combined axial-radial configuration. The motor and reducer are arranged in series in the axial direction, but the output shaft of the motor is positioned radially outward from the central axis, allowing the reducer to be compactly disposed without increasing axial thickness. This dimensional repositioning resolves the contradiction between maintaining driving capability and reducing axial dimensions.
Solution Approach 2:
The output shaft of the motor is nested within the structural framework of the reducer assembly. Specifically, the output shaft is positioned radially outward and connects to the reducer's input, allowing the motor and reducer to share space efficiently. This nesting approach enables high driving capability while minimizing the overall axial footprint of the combined apparatus.
2Adaptability or versatility
If a motor is designed with a large outer diameter to accommodate a reducer in its cavity, then the reducer can be integrated, but the overall volume is increased
Solution Approach 1:
Instead of integrating the reducer within the motor's central cavity (radial integration), the invention positions the motor's output shaft radially outward from the central axis. This allows the reducer to be disposed externally in a compact manner, avoiding the need for a large motor outer diameter while still achieving effective integration. The dimensional shift from central to radial positioning enables space-efficient configuration.
Solution Approach 2:
The motor-reducer system is segmented into distinct functional modules with optimized spatial arrangement. The motor maintains its standard structure without requiring a enlarged cavity, while the reducer is positioned as a separate but integrated component. This segmentation allows each component to be optimized independently, reducing the overall volume while maintaining adaptability and integration benefits.
3Power
If the motor and reducer are combined to achieve high torque output, then the driving capability is improved, but the device complexity is increased
Solution Approach 1:
The motor and reducer are merged into a compact integrated assembly where the motor's radially positioned output shaft directly connects to the reducer's input. This merging eliminates the need for complex coupling mechanisms and intermediate transmission components, achieving high torque output through direct integration while minimizing structural complexity. The unified design allows efficient power transmission with fewer parts.
Data Source
AI summary
A speed reduction apparatus includes a motor and a speed reduction assembly. The motor includes a first rotating shaft and a second rotating shaft a second rotator and a first rotator, a stator, a first motor housing, a second motor, and a first bearing and a second bearing at a radial outer side of the first rotating shaft, the first bearing and the second bearing being axially located at the same side of the first rotator facing the first motor housing. The speed reduction assembly includes a first gear, third gears engaging with the first gear, and a second gear, an output shaft, the third gears turning the second gear to rotate, and the second gear driving the output shaft, and a bracket between the output shaft and the first rotating shaft, the first gear, the second gear and the third gears being located at an axial outer side of the first motor housing, and at least one of the first gear, the second gear and the third gears being located radial outer sides of the first bearing and the second bearing.