Planetary Reducer Drive Shaft Integration for Compact Door Operators
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Solution Overview
Problem
The existing drive mechanisms of automatic door operators require a large axial space due to the need for a coupling between the planetary reducer and the drive shaft, hindering miniaturization design and increasing costs.
Innovation Solution
A drive mechanism where the drive shaft is directly non-rotatably connected to the torque output hole of the final-stage planet carrier, eliminating the need for an output shaft and coupling, and incorporating angular contact ball bearings for support, thereby simplifying the configuration and reducing axial length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling is used to connect the planetary reducer and the drive shaft, then the connection is reliable, but the axial space occupied increases
Solution Approach 1:
The patent merges the coupling connection function directly into the planetary reducer housing by providing a torque output hole in the final-stage planet carrier that directly receives the drive shaft. This eliminates the separate coupling component and reduces axial length while maintaining reliable torque transmission through the integrated connection structure.
2Reliability
If a coupling is used to connect the planetary reducer and the drive shaft, then the connection is reliable, but the device complexity increases
Solution Approach 1:
The patent combines the coupling's torque transmission function into the planetary reducer's final-stage planet carrier by providing a torque output hole directly in the planet carrier. This integration eliminates the separate coupling component, reducing structural complexity while maintaining reliable connection through the direct torque transmission path from planet carrier to drive shaft.
Data Source
AI summary
An automatic door operator and a drive mechanism thereof are disclosed. The drive mechanism of the automatic door includes a planetary reducer driven by an electric motor, and a drive shaft driven by a planetary reducer. The planetary reducer includes a housing and a planetary gear train mounted in the housing. The planetary gear train includes a final-stage planet carrier configured to output torque, and a center of the final-stage planet carrier is provided with a torque output hole. A first end of the drive shaft is detachably inserted in the torque output hole and is non-rotatably connected to the torque output hole, and a second end of the drive shaft extends out of the housing. The drive mechanism of the automatic door operator is advantageous to the miniaturization design of the automatic door operator.