Four-stage planetary reducer

Abstract

The invention provides a four-stage planetary reducer which includes an input flange, an input shaft, a ring gear, a first-stage planetary gear train, a second-stage planetary gear train, a third-stage planetary gear train, a fourth-stage planetary gear train, an output shaft and a mandrel. The ring gear is of an integrated structure, planetary gears of the four sets of planetary gear trains meshwith the ring gear, the mandrel is arranged at the center positions of four sun gears in a penetrating mode, the centers of the four sun gears are fixed, the concentricity of the overall structure isimproved, a first planetary carrier, a second planetary carrier and a third planetary carrier separately adopt split-type structures to install the corresponding planetary gears, the cost is reduced,and the width of the first-stage planetary wheel and the second-stage planetary wheel is same. The width of the third-stage planetary gear is 1.5-3 times that of the first-stage planetary gear, the width of the fourth-stage planetary gear is 4-5 times that of the first-stage planetary gear, the high-intensity force at one end of the output shaft can be overcome, and the stability is improved.

Description

technical field [0001] The invention relates to the technical field of planetary reducers, in particular to a four-stage planetary reducer. Background technique [0002] With the rapid development of science and technology, the planetary reducer has been seeking the most stability and precision, and the more planetary coefficients, the more parts to assemble, and the longer the overall structure. Currently, there are four-stage planetary reducers on the market. The four-stage planetary reducer also has the following defects: 1. The concentricity of each planetary system has a deviation, which affects its stability and accuracy. 2. The ring gear adopts three to four ring gears, which are locked and fixed by screws, which will reduce the connection accuracy of each part. 3. In the fourth-stage planetary system close to the output shaft in the past, the width of the fourth-stage planetary gear is the same as that of the first, second, and third stages. The higher the strength...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of science and technology, the planetary reducer has been seeking the most stability and precision, and the more planetary coefficients, the more parts to assemble, and the longer the overall structure. Currently, there are four-stage planetary reducers on the market. The four-stage planetary reducer also has the following defects: 1. There is a deviation in the concentricity between the various planetary systems, which affects its stability and accuracy

2. The ring gear adopts three to four ring gears, which are locked and fixed by screws, which will reduce the connection accuracy of each part

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