Planetary carrier assembly, planetary gear reducer and its assembly, and assembly method for backlash elimination
The planetary carrier assembly with rigid and flexible plates adjusts planetary gear positions to eliminate backlash, improving transmission accuracy and simplifying the gearbox structure.
JP2026086364APending Publication Date: 2026-05-26AICI PRECISION (SHENZHEN) CO LTD
Patent Information
- Authority / Receiving Office
- JP Β· JP
- Patent Type
- Applications
- Current Assignee / Owner
- AICI PRECISION (SHENZHEN) CO LTD
- Filing Date
- 2025-10-31
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Conventional epicyclic transmission devices suffer from decreased transmission accuracy and increased side clearance due to machining and assembly errors of gears, necessitating a solution for high-precision transmission.
Method used
A planetary carrier assembly is designed with an outer rigid carrier plate and an inner flexible carrier plate, utilizing an expansion tool and fasteners to adjust the radial position of planetary gears, eliminating backlash through tight meshing with internal gears.
Benefits of technology
The solution effectively reduces backlash and corrects machining errors, enhancing meshing accuracy and simplifying the gearbox structure by eliminating the need for additional expansion mechanisms.
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Smart Images
Figure 2026086364000001_ABST
Abstract
The present invention provides a planetary carrier assembly, a planetary gearbox and its assembly, and an assembly method for eliminating backlash. [Solution] The system comprises a first frame and a second frame, with the planetary gear fixed to the second frame via bearings. The end faces of the second frame and the adjacent end faces of the first frame are assembled and fixed via fasteners. A portion of the carrier plate of the second frame is of an elastic or separate structure, allowing for elastic deformation. During the expansion process of the second frame, the meshing between the first planetary gear and the fixing ring gear becomes tighter. Before assembling the sun gear to the planetary gear reducer assembly, an expansion tool is used to expand the pitch circle diameter of the axis of the planetary gear on the second frame, reducing the meshing gap between the fixing ring gear and the first planetary gear. The second bolt is then tightened in a tightly meshed state, bringing the adjacent end faces of the first and second frames into contact. After this, the expansion tool is removed and the remaining components are installed.
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