Harmonic reducer

Abstract

The invention provides a harmonic reducer. The harmonic reducer comprises a flexible gear and a rigid gear; internal teeth are arranged on the rigid wheel; the flexible gear is located on the inner side of the rigid gear and correspondingly provided with corresponding outer teeth; the flexible gear comprises a first tooth crest and a first tooth root; the first tooth crest and the first tooth rootare arc-shaped, and a plane along the common tangent direction is connected between the first tooth crest and the first tooth root; the rigid wheel comprises a second tooth crest and a second tooth root; the second tooth crest is a plane, and transition arcs are arranged at the vertex angles on the two sides respectively; the second tooth root is arc-shaped; and a plane along the common tangent direction is connected between the second tooth crest and the second tooth root. According to the technical scheme provided by the embodiment of the harmonic reducer, the tooth crests are in arc transition, so that tooth profile interference and tooth crest interference are prevented from being generated in the engaging-in and engaging-out processes, engaging-in and engaging-out are smoother, and the engaging noise is reduced; and the tooth roots adopt arc transition, so that stress concentration is avoided, the possibility of tooth root breakage is reduced, and the bearing capacity is improved.

Description

technical field [0001] The present application relates to the technical field of reducers, in particular to a harmonic reducer. Background technique [0002] The harmonic reducer is a kind of mechanical transmission reducer that relies on the elastic deformation of flexible parts to transmit power and motion. The core components are flexible splines, rigid splines and wave generators, commonly known as the three major components, with large transmission ratio, high precision, It has the advantages of large bearing capacity, small size, light weight, high transmission efficiency, stable transmission, and the ability to transmit motion to confined spaces; however, the flexspline adopts an involute tooth shape, and the teeth of the flexspline are meshed with the teeth of the rigid spline. During the extraction process, tooth profile interference and tooth top interference are likely to occur, resulting in noise; flexsplines are thin-walled parts, and the involute tooth root tra...

AI Technical Summary

Problems solved by technology

[0002] The harmonic reducer is a kind of mechanical transmission reducer that relies on the elastic deformation of flexible parts to transmit power and motion. The core components are flexible splines, rigid splines and wave generators, commonly known as the three major components, with large transmission ratio, high precision, It has the advantages of large bearing capacity, small size, light weight, high transmission efficiency, stable transmission, and the ability to transmit motion to confined spaces; however, the flexspline adopts an involute tooth shape, and the teeth of the flexspline are meshed with the teeth of the rigid spline. During the extraction process, tooth profile interference and tooth top interference are likely to occur, resulting in noise; flexsplines are thin-walled parts, and the involute tooth root transition fillet is small, and stress concentration is easy to cause the tooth root to break and the load-carrying capacity is limited.

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