Speed reducer, differential drive device, robot and mechanical arm

Abstract

The invention relates to a speed reducer, a differential drive device comprising the speed reducer, a robot comprising the speed reducer and / or the differential drive device and a mechanical arm. The speed reducer comprises an output shaft and an input shaft, wherein the output shaft and the input shaft are installed on a shell in a rolling mode; the output shaft is fixedly provided with a second sun gear relative to the circumferential direction, the second sun gear is meshed with a second inner ring, the second inner ring is connected to a first inner ring through at least one eccentric coupler connection rod, and the first inner ring is meshed with a first sun gear fixed to the shell; the input shaft is a crankshaft and comprises an output shaft connection section, a second crank throw, a first crank throw and an input section, wherein the output shaft connection section, the second crank throw, the first crank throw and the input section are sequentially arranged from the output end to the input end of the speed reducer, the output shaft connection section and the input section are arranged concentrically, and the other sections are arranged in a relative eccentric mode; the input section is installed on the shell in a rotating mode; the axis of the second crank throw is collinear with the axis of the second inner ring, and the axis of the first crank throw is collinear with the axis of the first inner ring. The speed reducer is high in speed ratio and rigidity.

Description

technical field [0001] The invention belongs to the technical field of gear reducers in transmission devices. In particular, it concerns a reduction gear, a differential drive comprising the same, a robot and a robotic arm with a reduction gear and / or a differential drive. Background technique [0002] In the prior art, reducers are widely used in various fields such as mining, metallurgy, cement mixing, sugar extraction, lifting and transportation, hydropower stations, and navigation ships, especially in the steel industry, which require large transmission ratio, large input torque, and reliable operation. , Shock-resistant, overload-capable deceleration equipment. At present, the general reducer, such as the hard tooth surface reducer, its structure is: a box with an input shaft and an output shaft, and a two-stage reduction cylindrical gear is installed between the input shaft and the output shaft in the box. The transmission ratio is relatively small and prone to fatig...

AI Technical Summary

Problems solved by technology

At present, the general reducer, such as the hard tooth surface reducer, its structure is: a box with an input shaft and an output shaft, and a two-stage reduction cylindrical gear is installed between the input shaft and the output shaft in the box. The transmission ratio is relatively small and prone to fatigue damage, which cannot meet the requirements; the cycloid reducer can achieve a large transmission ratio, but the input torque cannot meet the requirements

Images