A Harmonic Reducer

Abstract

The invention discloses a harmonic wave reducer. The harmonic wave reducer comprises a front fixing frame, an input shaft, an output shaft, chain rings, toothed chain wheels, a rotating frame, a double-gear ring, rotary table bearings, pinion gears and a rear fixing frame, wherein the front fixing frame is provided with cranksets and is fixedly connected with power output equipment; the front fixing frame and the rear fixing frame are welded into a whole; the three pinion gears are uniformly distributed on the rear fixing frame; the input shaft is mounted in the center of the rear fixing frameand a rotating pair is formed; the chain rings are mounted between toothed chain wheels and inner cranksets; a fixed shaft wheel system is formed by the input shaft, the three pinion gears and the double-gear ring; the input shaft is rotated, and the double-gear ring is driven through the pinion gears to be rotated, a transmission ratio of the input shaft to the double-gear ring is i1, and the three toothed chain wheels are driven by the double-gear ring to be rotated; and the harmonic wave reducer is formed by the three toothed chain wheels as a microwave generator in the harmonic wave reducer, together with the chain rings, the output shaft, and the cranksets arranged on the front fixing frame and the rear fixing frame; and a transmission ratio of the double-gear ring to the output shaft is i2, and a transmission ratio i of the input shaft to the output shaft is equal to i1*i2.

Description

technical field [0001] The invention relates to the field of mechanical reduction transmission, in particular to a harmonic reducer. Background technique [0002] Harmonic gear transmission has the advantages of large transmission ratio, high transmission precision, good stability, simple structure, light weight and small volume. Harmonic gear transmission is based on the mechanical harmonics generated by the radial deformation of the thin-walled cylindrical flexible spline to transmit motion and power, and the fatigue fracture caused by the excessive bending stress of the thin-walled cylindrical flexible spline is the main cause of this transmission. The failure mode, the bending stress in the flexspline is proportional to the radial deformation and wall thickness, the radial deformation of the flexspline is related to the transmission ratio, the smaller the transmission ratio, the greater the radial deformation, the shorter the life of the transmission, and the flexspline ...

AI Technical Summary

Problems solved by technology

Harmonic gear transmission is based on the mechanical harmonics generated by the radial deformation of thin-walled cylindrical flexible splines to transmit motion and power. Among them, the fatigue cracking of thin-walled cylindrical flexible splines caused by excessive bending stress is the main cause of this transmission. In the form of failure, the bending stress in the flexspline is proportional to the radial deformation and wall thickness, and the radial deformation of the flexspline is related to the transmission ratio. The smaller the transmission ratio, the greater the radial deformation, and the shorter the life of the transmission. As the wall thickness of the wheel increases, the bending stress increases and the service life decreases. On the contrary, the wall thickness decreases, the stiffness of the flex spline decreases, the stress concentration of the gear teeth increases, and even the gear teeth interfere, which aggravates the failure of the transmission device.

[0003] The strength and life of the flexwheel are also related to its material and processing technology. Usually, it is necessary to use high-quality alloy steel, and carry out quenching and tempering, nitriding, carburizing and shot peening, and strictly control the dimensional accuracy, shape accuracy and Surface quality, it can be seen that the manufacturing process of the harmonic gear transmission is quite complicated, the manufacturing cost is high, and it is difficult for ordinary manufacturers to meet its technical requirements

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