Planetary speed reducer with small tooth number difference

Abstract

The invention discloses a planetary speed reducer with small tooth number difference, which comprises a housing, a power input shaft matched with the rotation of the housing and a power output tray, wherein a sun wheel is fixedly matched and arranged on the power input shaft in the circumferential direction, at least two planetary wheels are meshed with the sun wheel, and planetary wheel shafts of the planetary wheels are provided with eccentric sleeves; a cycloidal gear is arranged on the housing in a manner of being meshed with a fixed pin gear with small tooth number difference; each eccentric sleeve respectively penetrates the cycloidal gear along the axial direction and is in running fit with the cycloidal gear, the end parts of each planetary wheel shaft penetrates into the power output tray along the axial direction and is in running fit with the power output tray in the circumferential direction, the tooth profile of the cycloidal gear is formed by leading the pin gear to do primary envelope motion, and the tooth profile of an internal gear is formed by leading the cycloidal gear to do secondary envelope motion. The planetary speed reducer with the small tooth number difference not only has the characteristic of multi-tooth meshing of the ordinary cycloidal pin gear planetary transmission, but also has the doublet contact characteristic, and can further fully play the error averaging effect by increasing contact points and improve the transmission precision.

Description

technical field [0001] The invention relates to a reducer with small tooth difference, in particular to a planetary reducer with small tooth difference. Background technique [0002] The internal meshing planetary gear transmission has the advantages of large reduction ratio, stable transmission and compact structure, so it has been widely used in the field of mechanical transmission. [0003] The internal meshing planetary gear transmission in the prior art includes a housing, a power input shaft and a power output disc that rotate with the housing, a sun gear is fixedly fitted on the power input shaft in the circumferential direction, and at least two planetary gears are engaged with the sun gear. The planetary wheel shaft of the planetary wheel is equipped with an eccentric sleeve; the housing is concentric with the power input shaft and the fixed pin is set, and the cycloidal wheel is meshed with the fixed pin with a small tooth difference; the eccentric sleeve passes th...

AI Technical Summary

Problems solved by technology

The internal meshing planetary gear transmission with the above structure has many components, complex structure, and high assembly requirements, resulting in many factors affecting accuracy and return difference; only one-sided output can be realized, and symmetrical output cannot be realized; in the cycloidal pin wheel planet In the deceleration mechanism, a pair of teeth of the pin wheel and the cycloid wheel mesh in a single-line contact, the curvature of the induction method is large, and the load-carrying capacity is poor

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