Floating planetary gear train structure for miniature precise planetary reducer

Abstract

The invention discloses a floating planetary gear train structure for a miniature precise planetary reducer. The floating planetary gear train structure comprises a planetary carrier, a high-speed sungear, a low-speed sun gear, a planetary gear set and an inner gear ring, wherein the high-speed sun gear is meshed with the planetary gear set, the inner gear ring is meshed with the planetary gear set, the planetary carrier is in a cage type structure, and the planetary gear set is arranged on the cage type planetary carrier in a floating mode to automatically adapt to the central distance and the matching clearance; the floating planetary gear train structure further comprises a gasket, and the two ends of the planetary gear set are correspondingly limited by the cage type planetary carrierand the gasket to limit the axial movement of the planetary gear set. The floating planetary gear train structure for the miniature precise planetary reducer is exquisite and compact in structure, aU-shaped stepped slot and an annular open slot are designed on the cage type planetary carrier, planetary gears are mounted on the U-shaped stepped slot in a rotating floating mode through pin shaftsand needle bearings so as to automatically adapt to the central distance and the matching clearance, so that the loads of all the planetary gears are uniform, the meshing transmission of the sun gear,the planetary gear and the inner gear ring is ensured, the operation is smooth, the noise and the temperature rise are reduced, the problems of blockage or unbalance are solved, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of planetary reducers, in particular to a floating planetary gear train structure for a miniature precision planetary reducer. Background technique [0002] As a gear transmission element, the planetary reducer is mainly used to increase the torque and reduce the speed in the transmission system. It is widely used in various fields such as industry and automation, including linear action mechanisms, indexing plates, mechanical arms, printing Equipment, tables, robot spindles, conveying equipment, etc. [0003] Among them, the parts of the miniature precision planetary reducer are small in size, and the processing accuracy of each part is very high, otherwise it will be difficult to meet the transmission requirements of the precision reducer, which will cause uneven load on the planetary wheel, resulting in noise and temperature rise of the reducer, and reduce the speed of the miniature precision planetary re...

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Problems solved by technology

[0003] Among them, the parts of the miniature precision planetary reducer are small in size, and the processing accuracy of each part is very high, otherwise it will be difficult to meet the transmission requirements of the precision reducer, which will cause uneven load on the planetary wheel, resulting in noise and temperature rise of the reducer, and reduce the speed of the miniature precision planetary reducer. Machining costs increase

[0004] Prior art Chinese invention patent CN 208089877 U discloses a planetary reducer structure, which adopts a small gap suspension design to ensure that the gap between each meshing surface is automatically corrected, the force is uniform, and the bearing capacity is high; there is also a Chinese invention patent CN108050210 A that discloses A planetary reducer structure, by setting a cylindrical pin with a reserved gap in the circular ring gear and the housing hole, when the planetary gear is unbalanced, the internal gear and the planetary gear carrier will automatically float until the load between the planetary gears Evenly distributed and balanced, the reliability of the planetary reducer is effectively improved. The above existing technologies all adopt the clearance floating method to adjust the clearance of the meshing surface, but due to the existence of the clearance, the cylindrical pin may move axially or axially. The problem of movement makes the transmission unstable, the noise is loud, and there will be problems of stagnation or partial load

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