Flexible gear and harmonic reducer

Abstract

The invention provides a flexible gear and a harmonic reducer. The flexible gear comprises a gear section (1), a flange section (5) and a corner section (3) between the gear section (1) and the flangesection (5), and the corner section (3) is a curve section of a variable thickness transition; and the curve section of the variable thickness transition comprises a first variable thickness section(a), a second variable thickness section (c) and a transition section (b), the first variable thickness section (a) is relatively close to the flange section (5), the second variable thickness section(c) is relatively close to the gear section (1), and the transition section (b) is connected between the first variable thickness section (a) and the second variable thickness section (c). Accordingto the flexible gear, the transition thickness of a thin-wall section and a visor section of the flexible gear is effectively increased. Compared with a common flexible gear, the flexible gear strength of the flexible gear is increased, the fatigue stress of the flexible gear during load operation of the harmonic reducer is reduced, the failure risk of the corner section of the flexible gear is reduced, the service life of the flexible gear is favorably prolonged, and the reliability of the harmonic reducer is improved.

Description

technical field [0001] The invention belongs to the technical field of reducers, and in particular relates to a flexible gear and a harmonic reducer. Background technique [0002] The reducer has the characteristics of high precision, high torque, low vibration and fast response, so it is widely used in different fields such as industrial robots, mechanical equipment, aerospace, communication equipment, and optical equipment. Among them, the field of industrial robots mainly uses harmonic reducers, RV reducers and planetary gear reducers. Due to its high transmission precision, high efficiency, stable transmission, and small size, the harmonic reducer has obvious advantages when applied to some joints of robots. The flexible gear, referred to as the flexspline, is a thin-walled part. The structure of the ordinary flexspline (top hat type) consists of a gear section 1, a thin-walled section 2, an arc transition section 3, a visor section 4 and a flange section 5. This kind ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the alternating stress imposed by the flexible gear in the harmonic reducer in the prior art and the differential tooth meshing torque imposed by the rigid gear on it, resulting in arc transition The section is easily damaged and affects the life of the reducer, thus providing a flexible gear and harmonic reducer

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