Small tooth number difference transmission mechanism and reducer comprising same

Abstract

The invention discloses a small tooth number difference transmission mechanism and a reducer comprising the same. The small tooth number difference transmission mechanism comprises an outer wheel (8), an inner wheel (10), roller pins (9), a magnetic ring (11), an input shaft (1) and an output shaft (16). The output shaft (16) is connected the outer wheel (8) or inner wheel (10) and outputs rotation or torque through the outer wheel (8) or inner wheel (10). The inner wheel (10) is eccentrically disposed in the outer wheel (8) through an eccentric member (13) and is axially overlapped on the outer wheel (8). The outer ring of the inner wheel (10) is provided with n2 inner wheel roller pin grooves (34). The inner ring of the inner wheel (8) is provided with n1 outer wheel roller pin grooves (33); n2 is smaller than n1. The roller pins (9) are arranged in the roller pin grooves of the outer wheel (8) or inner wheel (10); during transmission, the roller pin grooves squeeze the roller pins (9) and transmits power by meshing of the roller pins (9). The input shaft (1) is connected with the inner wheel (10) and drives the inner wheel (10) to eccentrically and translationally revolve through the eccentric member (13).

Description

technical field [0001] The invention belongs to the field of machinery, and relates to a transmission mechanism with few tooth differences and a reducer thereof. Background technique [0002] The gear transmission with few teeth difference is a kind of planetary gear transmission. [0003] It consists of an external gear and an internal gear to form a pair of internal meshing gear pairs. It can adopt involute tooth type or cycloid type. The number of teeth of the internal and external gears is different, which is referred to as small tooth difference transmission. Its most basic form is the 2K-H type (that is, two center wheels a, b and a rotating arm H), the transmission ratio is iaH=1+Zh / Zn, it evolves two typical forms of planetary gear transmission with few tooth differences, K-H-V planetary gear transmission, the basic components are center wheel b, rotating arm H and component V: [0004] 1. When the center wheel b is fixed, the rotating arm H is active, and the comp...

AI Technical Summary

Problems solved by technology

The harmonic reducer avoids the involute tooth interference through the continuous deformation of the external gear (also called "flexible spline"), and can achieve multi-tooth meshing at the same time, but the manufacturing of the flexible spline in the harmonic reducer is difficult, and most of them use Application in small reducer

[0015] The cycloidal pin gear reducer avoids the interference problem of internal meshing through the cycloid, but the manufacturing precision of the cycloid wheel is high, the deformation of the needle and the high-speed rotation of the needle sleeve, and the radial component force generated during the meshing of the cycloid, The cycloidal pin wheel also cannot meet the application fields that require large speed ratio, high power or high torque output

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