Harmonic transmission device for cycloidal-pin wheel

Abstract

The invention discloses a harmonic transmission device for a cycloidal-pin wheel. The device comprises a cam shaft, a flexible bearing, a flexible gear, roller pins and a rigid wheel, the flexible bearing is arranged on the elliptic cam shaft, and the inner circle of the flexible gear is matched with the outer circle of the flexible bearing; the outer tooth surface of the flexible gear is in contact with each roller pin, the roller pins are evenly distributed in a semicircle groove of the rigid wheel, the inner circle of a main bearing is fixedly connected with the flexible gear, and the outercircle of the main bearing is fixedly connected with the rigid wheel. According to the harmonic transmission device for the cycloidal-pin wheel, the high tooth root of a harmonic transmission gear ofthe cycloidal-pin wheel is in a cycloidal tooth profile, the risk of fracture and failure is reduced, the large meshing amount can be obtained without the need of extremely deep meshing distance, thetooth width is large, and all teeth are involved in meshing; the specific pressure of the tooth surface is small, the gear can bear extremely large torque, deformation of the flexible gear is also small, the service life of the flexible gear can be greatly prolonged, and the intensity of the flexible gear can be improved.

Description

technical field [0001] The invention relates to the field of precision reducers, in particular to a cycloidal pin wheel harmonic transmission device. Background technique [0002] In the fields of industrial robots and various precision machinery, precision reducers are a core component. In these fields, the reducer is required to have the characteristics of small size, light weight, high rigidity, overload resistance, and smoothness, as well as large speed ratio, small clearance, small angular transmission error and good acceleration performance. [0003] K-H-V(N) type involute less tooth difference planetary transmission is a pair of planetary gears installed on the input shaft with two phase difference [0004] On the 180-degree eccentric journal, two planetary gears mesh with the same internal gear. There is a difference between the number of teeth of the internal gear and the number of teeth of the planetary gear. Angle of rotation, the angle of rotation is determined...

AI Technical Summary

Problems solved by technology

[0007] The problem existing in the open-line planetary transmission with small tooth difference and harmonic transmission is that when the tooth number difference is too small, tooth profile overlapping interference and node-to-node tooth-top interference will occur, which need to be solved by reducing the tooth height and increasing the pressure angle, but This still cannot fundamentally solve the problem

[0009] At present, no transmission form using cycloidal pin-wheel meshing has been found in the harmonic drive. The present invention proposes a cycloidal pin-wheel harmonic drive based on the above background.

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