Shaft Coupling Layout for Axis Deviation in Compact Movers
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Solution Overview
Problem
Existing mover systems face challenges in aligning the rotational center axes of the output shaft and drive wheel, leading to increased axial lengths of the motor and speed reducer, which complicates the transmission of rotational power and affects the overall size and efficiency of the system.
Innovation Solution
A shaft coupling with a cylindrical portion that houses the speed reducer or motor partially inside, featuring an input and output portion with an absorber to align and transmit rotational power while absorbing deviations between the axes, reducing the axial lengths of the speed reducer and drive wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling with an absorber is used to overcome axis deviation, then the reliability of power transmission is improved, but the axial length of the motor and speed reducer increases significantly
Solution Approach 1:
The speed reducer is nested inside the motor housing, with the speed reducer's input shaft directly coupled to the motor's output shaft. This nested configuration allows the coupling with absorber to accommodate axis deviations while the components share the same axial space, significantly reducing the overall axial length compared to separate mounting arrangements
Solution Approach 2:
The motor and speed reducer are merged into a single integrated assembly where the speed reducer is mounted within the motor housing. This combination eliminates the need for separate mounting spaces and reduces the total axial length while maintaining the power transmission function with deviation absorption capability
Data Source
AI summary
A mover includes a body, an axle, a drive wheel, a motor, a speed reducer, and a shaft coupling. The wheel is arranged rotatably around the axle. The reducer is attached to the axle to reduce and transmit rotational power of the motor and includes an output shaft aligned with a center axis of the axle. The coupling transmits the rotational power of the reducer to the wheel and includes a cylindrical portion having an annular shape when viewed along the center axis and housing the reducer at least partially inside. The cylindrical portion includes an input portion and an output portion at first and second ends, respectively, along the center axis. The cylindrical portion further includes an absorber between the input and output portions to absorb deviation and an angle of deviation between respective rotational center axes of the output shaft and the drive wheel.