Multi-stage planetary reducer

Abstract

The invention relates to a multi-stage planetary reducer. The multi-stage planetary reducer comprises a shell, a cover, an anti-rotating pin, an input support bearing, a multi-stage planetary transmission mechanism, wherein the multi-stage planetary transmission mechanism is arranged in the shell; the cover is used for sealing; the anti-rotating pin is arranged between the fixing gear rings of the multi-stage transmission mechanism and the shell; a spacer sleeve is arranged between each stage of planet carrier and the shell; the thickness of each spacer sleeve is larger than the thickness of the corresponding planet carrier; a positioning ring is arranged between each spacer sleeve and the corresponding fixing gear ring; the positioning rings ensure that gaps exist between the planet carriers and planet gears of every two adjacent planetary transmission mechanisms. By adopting the multi-stage planetary reducer, the defects in the prior art are overcome; axial positioning is realized for each stage of planetary carrier and the corresponding planet gear; and the friction contact area of the reducer is reduced, so that the transmission efficiency of the reducer is effectively improved.

Description

technical field [0001] The invention relates to a planetary reducer, in particular to a multi-stage miniature planetary reducer with improved sliding bearings. Background technique [0002] Typical multi-stage planetary reducer structure such as figure 1 As shown, in general, in order to make the structure compact, the multi-stage planetary reducer adopts the axial floating of planetary gears / planet carriers at each stage, without axial positioning, and finally is positioned by the axial positioning method blocked by the housing. In order to ensure that the gears can rotate, it is necessary to reserve a certain axial clearance after the installation of the gears at all levels. However, this positioning method cannot ensure that the clearance between the planets of each level is uniform, and there are even cases where the clearance between the planets of individual levels is particularly small. In addition to rotating around its own axis, the gear also revolves around the ax...

AI Technical Summary

Problems solved by technology

In order to ensure that the gears can rotate, it is necessary to reserve a certain axial clearance after the installation of the gears at all levels. However, this positioning method cannot ensure that the clearance between the planets of each level is uniform, and there are even cases where the clearance between the planets of individual levels is particularly small. In addition to rotating around its own axis, the gear also revolves around the axis of the reducer with the planet carrier, so in addition to contacting the planet carrier of this stage, it also contacts the other stage of planet carrier positioned axially, so it will cause a lot of sliding friction during operation , so that the efficiency of the reducer is greatly reduced

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