Flexible gear and harmonic reducer

Abstract

The invention provides a flexible gear and a harmonic reducer. The flexible gear is of a bowl-shaped structure and comprises a straight barrel section (1), a contraction section (2) and a bottom flange (3); the contraction section (2) comprises a third arc section (6), a first arc section (4) and a second arc section (5) which are sequentially arranged in the axial direction of the straight barrel section (1); the second arc section (5) and the third arc section (6) are convex arcs; the third arc section (6) is connected with the straight barrel section (1); and the bottom flange (3) is arranged at the tail end of the second arc section (5). According to the flexible gear of the invention, the stress concentration phenomenon at the bottom of the flexible gear can be effectively improved, the anti-fatigue capacity is improved, and the bearing capacity of the flexible gear is improved.

Description

technical field [0001] The application relates to the technical field of reducers, in particular to a flexspline and a harmonic reducer. Background technique [0002] Harmonic reducer is a kind of gear reducer. The harmonic reducer is mainly composed of three major parts: rigid wheel, flexible wheel and wave generator, all of which are indispensable. Among them, the wave generator is composed of a cam and a flexible rolling bearing, and the hub of the cam is an elliptic curve. Due to the unique structure of the harmonic reducer, compared with the general gear reducer, it has the advantages of large transmission ratio, wide range, large number of meshing teeth, large load capacity, simple structure, small size, light weight, stable transmission, no impact, and high transmission efficiency. , High transmission precision and other characteristics, so it is widely used in aerospace, bionic machinery, precision transmission and other industries. [0003] As the weakest part of ...

AI Technical Summary

Problems solved by technology

The commonly used structures of flexsplines are cup-shaped, hat-shaped, cylindrical, etc. Among them, the structure of cup-shaped flexsplines is the most complex and has serious stress concentration, which makes the flexsplines prone to fatigue damage.

At present, the common cylinder structure of cup-shaped flexspline is straight cylinder. Although the circular arc transition is adopted between the cylinder body and the bottom area of ​​the cylinder, there is still a phenomenon of stress concentration.

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