Differential planetary reducer

Abstract

The invention discloses a differential planetary reducer. The differential planetary reducer comprises a base, a primary annular gear, a secondary annular gear, an input shaft, an output shaft, central wheels, planetary wheels and a planetary frame. The differential planetary reducer is characterized in that the center wheels include a primary center wheel and a secondary center wheel which are respectively fixed on the input shaft and integrate the input shaft; the planetary wheels include a primary planetary wheel and a secondary planetary wheel; the primary planetary is engaged with the primary center wheel and the primary annular gear simultaneously, so that a primary reduction system can be formed; the secondary planetary wheel is engaged with the secondary center wheel and the secondary annular gear simultaneously, so that a secondary reduction system can be formed; the primary planetary wheel and the secondary planetary share the planetary frame; and the secondary annular gear is fixedly connected with the output shaft. Besides the advantages of an NGW type planetary reducer and an NGWN type planetary reducer, the differential planetary reducer further has the advantages of simple structure, small size, light weight, strong bearing capacity, long service life and convenient processing and manufacturing.

Description

technical field [0001] The invention relates to a mechanical speed reducer for transmitting motion and power, in particular to a differential planetary speed reducer. Background technique [0002] The types of high-speed ratio planetary reducers currently used in production are mainly multi-stage NGW planetary reducers and NGWN planetary reducers. The single-stage transmission of the NGW planetary reducer is relatively small, generally between 1.13 and 13.7, and commonly used between 2.7 and 9. In order to obtain a large reduction ratio, the number of stages can only be increased, but as the number of stages increases, the structure of the reducer will become complicated, the volume will increase, and the weight and manufacturing cost will also increase. Therefore, the multi-stage NGW type planetary reducer is not the best choice for the high-speed ratio reducer. Although the NGWN planetary reducer has a simple structure, the single-stage reduction ratio is relatively high...

AI Technical Summary

Problems solved by technology

However, the planetary gear is a double gear, because the planetary gear of the planetary reducer is generally two or more, and the double gear as a planetary gear brings difficulties to manufacture and installation, and the manufacturability is poor.

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