Integrated Motor Reducer Coaxial Alignment
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Solution Overview
Problem
Conventional motor-reducer assemblies face issues with non-coaxial rotation due to separate production of components, leading to tolerance-related problems that affect torque output and service life, and are bulky due to separate sensors for input and output angle detection.
Innovation Solution
The motor-reducer assembly integrates the rotating shaft, wave generator, and motor rotator coaxially, with a flex spline and circular spline for reliable engagement and speed reduction, and includes detecting sets for simultaneous input and output angle measurement without increasing volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the motor rotator and rotating shaft are produced separately and assembled, then manufacturing flexibility is improved, but coaxial alignment accuracy deteriorates due to tolerance accumulation
Solution Approach 1:
The patent integrates the motor rotator and rotating shaft into a single monolithic component produced by precision casting. This merging eliminates the separate production and assembly steps that cause tolerance accumulation, ensuring high coaxial alignment accuracy while maintaining manufacturing efficiency through integrated production.
2Difficulty of detecting and measuring
If separate sensors are installed at the rear end for both input and output angle detection, then measurement functionality is improved, but device volume increases making the drive bulky
Solution Approach 1:
The patent combines both input angle sensor and output angle sensor into a single integrated sensor unit located at the rear end of the motor rotator. This merged sensor design provides both input and output angle detection functionalities while occupying minimal space, preventing the drive from becoming bulky.
3Ease of manufacture
If the wave generator and rotating shaft are produced separately and assembled, then manufacturing flexibility is improved, but transmission reliability deteriorates due to non-coaxial rotation
Solution Approach 1:
The patent integrates the wave generator and rotating shaft into a single component produced by precision casting. This integration eliminates the separate production and assembly that cause non-coaxial rotation, ensuring reliable harmonic gear transmission by maintaining precise coaxial alignment between the wave generator and flex spline.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integrated design ensures coaxial rotation, improves torque output, extends service life by eliminating tolerance-related issues, and allows for accurate rotational speed and angle measurement without increasing the drive's bulkiness.
Implementation Method 1
a magnetic motor rotator... The motor rotator corresponds to the motor stator
Implementation Method 2
The flex spline and the circular spline partially engage with each other... gives speed-reducing effects
Data Source
AI summary
A motor-incorporating reducer includes a main body, a rotational actuating member, a flex spline, and an circular spline. The rotational actuating member has a rotating shaft, a wave generator, and a motor. The rotating shaft passes through the main body, and the elliptic wheel is integratedly formed around the rotating shaft. The motor has a magnetic motor rotator that is integratedly formed on the rotating shaft. With the integrated structure, the rotating shaft, the elliptic wheel, and the motor rotator can stably perform rotation, thereby eliminating the risk that the three, when formed separated and assembled, would become non-coaxial due to the resultant tolerance after assembly and have eccentric rotation, and in turn preventing adverse effects on the drive's output torque due to non-coaxial rotation and extending the drive's service life.