Planetary Gear Transmission Recursive Rotation Bracket
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional planetary gear transmission devices have a large size due to the separate placement of input and output parts on opposite sides, which limits their compactness and efficiency in applications such as robotics.
Innovation Solution
The design incorporates a recursive rotation bracket that allows the motor shaft to connect to either the sun gear, ring gear, or carrier, enabling the output of rotational force through a single side, thereby reducing the overall size by integrating the input and output mechanisms on one side of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the input part and output part are disposed on opposite sides of the planetary gear device, then the power transmission function is achieved, but the overall size of the transmission device becomes large
Solution Approach 1:
The patent merges the input part and output part onto the same side of the planetary gear device by making the carrier serve dual functions: as the input component that receives rotational force from the motor, and as the output component that transmits rotational force to the wheel. This integration eliminates the need for separate input and output structures on opposite sides, thereby reducing the overall device size while maintaining power transmission functionality.
2Volume of moving object
If the carrier is used as both input and output component, then the size is reduced, but the motor body rotation must be controlled precisely
Solution Approach 1:
The patent employs dynamic control of the motor body to compensate for the dual-function carrier configuration. By precisely controlling the rotation of the motor body, the system achieves the desired power transmission while accounting for the integrated input-output carrier structure. This dynamic adjustment allows the compact design to function correctly despite the increased control requirements.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A planetary gear transmission device is provided. The planetary gear transmission device includes a planetary gear device including a sun gear, a ring gear, a plurality of planet gears, and a carrier, a motor to generate a rotational force input to the planetary gear device and including a motor shaft and a motor body, a fixing bracket formed to fix any one of the sun gear, the ring gear, or the carrier of the planetary gear device to prevent rotation, and a recursive rotation bracket provided with the motor and fixed to one of the parts of the planetary gear device, which is not fixed by the fixing bracket, wherein when one of the parts of the planetary gear device connected to the motor shaft is rotated by the motor shaft, the motor body is rotated by the recursive rotation bracket and the rotational force of the motor shaft is output through the recursive rotation bracket.