Double-row ball thin-walled flexible bearing and harmonic gear reducer

Abstract

The invention discloses a double-row ball thin-walled flexible bearing and a harmonic gear reducer. The double-row ball thin-walled flexible bearing comprises an outer ring, an inner ring coaxially disposed in the outer ring, an annular integral holder disposed between the outer ring and the inner ring, and rolling elements. Two rows of semicircle-shaped ball socket holes with openings in staggered arrangement are disposed along the outer circumference of the holder, the semicircle-shaped ball socket holes with openings in the same row have the same opening directions and are arrange in a uniformly-spaced manner, the semicircle-shaped ball socket holes with openings in the different rows have the opposite opening directions. The rolling elements are disposed in the ball socket holes of the holder, and are positioned on the arc-shaped raceways on the outer ring and the inner ring. The double-row ball thin-walled flexible bearings sleeve outer walls of the elliptical cams to form a wave generator subassembly. The rigidity in radial and circumferential direction and bearing capability of the harmonic gear reducer are improved, and then the contact status between the rigid and flexible wheels in the working process are improved, and distortion and snapping teeth of the flexible wheel under high overload are avoided, so that the working life of the harmonic gear reducer is prolonged.

Description

technical field [0001] The invention relates to the technical field of harmonic transmission, in particular to a double-row ball thin-wall flexible bearing and a harmonic gear reducer. Background technique [0002] Precision harmonic gear transmission is a high-tech product that emerged with the development of aerospace, rockets, satellites, etc. Due to its advantages of small size, light weight, large transmission ratio, high transmission precision and small hysteresis, it is widely used in automatic control, It has a wide range of applications in mechatronics, numerical control equipment, weapon systems, aerospace, robotics and other fields. [0003] The flexible bearing is one of the key components in the harmonic gear transmission. The traditional flexible bearing is composed of a single row of balls, thin-walled inner and outer rings and a cage. When it works, the inner and outer rings are constantly changing with the meshing interval of the rigid-flexible wheel. defor...

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Problems solved by technology

[0005] The object of the present invention is to provide a double-row ball thin-walled flexible bearing and a harmonic gear reducer, which overcome the low radial and axial bending stiffness, low load-carrying capacity, short service life and other problems of the existing harmonic drive flexible bearings. Insufficient work reliability

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