Cycloidal speed reducer capable of automatically compensating back clearance

Abstract

The invention discloses a cycloidal speed reducer capable of automatically compensating the back clearance, which relates to the technical field of transmission machinery and solves the technical problem on how to eliminate the back clearance. The speed reducer comprises an input shaft, an internal gear ring, two cycloidal gears, and a plurality of pins; the two cycloidal gears are respectively mounted on the input shaft through two eccentric bearings, and the pins respectively pass through pin holes of the two cycloidal gears; two groups of internal teeth are formed on the internal gear ring,wherein the tooth profiles of the left group of internal teeth are inwardly inclined from the left to the right, and the tooth profiles of the right group of internal teeth are inwardly inclined fromthe right to the left; the tooth profiles of external teeth of the left cycloidal gear are inwardly inclined from the left to the right, and moreover, the external teeth of the left cycloidal gear are engaged with the left group of internal teeth of the internal gear ring; the tooth profiles of external teeth of the right cycloidal gear are inwardly inclined from the right to the left, and moreover, the external teeth of the right cycloidal gear are engaged with the right group of internal teeth of the internal gear ring; and two elastic compensating washers for applying pretightening force on the two cycloidal gears are respectively sleeved on the left end and right end of each pin. The speed reducer provided by the invention can automatically eliminate the back clearance.

Description

technical field [0001] The invention relates to the technology of transmission machinery, in particular to the technology of a cycloid reducer with automatic backlash compensation. Background technique [0002] The existing cycloid reducers are divided into different forms such as single-stage reduction and multi-stage reduction. Most of the single-stage cycloidal reducers use two cycloidal wheels, a pinion housing, and the meshing of pins between the cycloidal wheel and the pinion housing to achieve deceleration and kinetic energy transmission. After this single-stage reducer is used for a long time, due to tooth profile wear, there will be a meshing gap between the cycloid wheel and the inner ring gear, and it is difficult to eliminate the hysteresis. Contents of the invention [0003] Aiming at the defects in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a cycloid reducer with automatic backlash compensation th...

AI Technical Summary

Problems solved by technology

After this single-stage reducer is used for a long time, due to tooth profile wear, there will be a meshing gap between the cycloidal wheel and the inner ring gear, and it is difficult to eliminate the hysteresis

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