Harmonic gear with continuous meshing tooth profile and tooth profile design method thereof

Abstract

The invention provides a harmonic gear with a continuous meshing tooth profile, and provides a tooth profile design method of the harmonic gear with the continuous meshing tooth profile formed by applying a rotation transformation method. The harmonic gear consists of a rigid wheel, a flexible wheel and a wave generator, wherein the rigid wheel is a rigid inner gear; the flexible wheel is a cup-shaped cylindrical straight-tooth outer gear; the difference between the number of teeth of the rigid wheel and the number of teeth of the flexible wheel is two; the tooth profile of the rigid wheel isgenerated by shifting and equidistant of a movement track of points on a center line of the deformation end of the flexible wheel described by the rotation transformation method; and the tooth profileof the flexible gear consists of an arc tooth top with the equidistant distance as the radius of the designed rigid wheel tooth profile and a curve with smooth transition with the arc tooth top. Thedesign method has the characteristics that the tooth profile design is simple and convenient, the designed harmonic gear has the advantages of many meshing teeth, high bearing capacity, long fatigue life, small distortion of the flexible wheel, large meshing depth, high transmission precision, good stability and wear resistance, and the design method is very suitable for tooth profile design of harmonic gear transmission.

Description

technical field [0001] The invention belongs to the technical field of harmonic gear transmission, and in particular relates to a harmonic gear with continuous meshing tooth profile and a tooth profile design method thereof. Background technique [0002] With the rapid development of the industrial robot industry, the demand for the use of harmonic gear transmissions has become more extensive, especially the use of high-precision, small-sized and high-reliability harmonic gear transmissions has increased sharply, which has great impact on the research of harmonic gear transmissions. For later Chinese researchers, there are greater challenges. At present, there are many institutes and enterprises researching and manufacturing harmonic gear drives all over the country, and their main research scopes are various, one of which is the research of meshing tooth profile. [0003] Regarding the research on tooth shape, the straight line tooth shape was first used in harmonic gear t...

AI Technical Summary

Problems solved by technology

Since the double-arc tooth shape is composed of multiple curves, it is necessary to analyze and evaluate the conjugate tooth shape of each tooth shape and fit the conjugate tooth shape, so the implementation is cumbersome.

Moreover, it is difficult to choose the fitting error and fitting function. If the fitting function is not selected properly, it will cause great problems in the design of harmonic gear transmission.

Usually, it is also necessary to evaluate the backlash of the fitting curve, and the advantages and disadvantages of the backlash evaluation method and calculation errors will also have an impact on the design of the conjugate tooth profile

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