Small-tooth-difference speed reducer

Abstract

The invention relates to the technical field of speed reducers, and provides a small-tooth-difference speed reducer which comprises a fixed base body, an outer gear ring, a rotary driving part, an eccentric rotary frame, a transmission rolling ring and an output gear ring. The outer gear ring is fixed to the fixed base body, and the inner ring of the outer gear ring is provided with a first inner tooth part; the rotary driving part is rotatably mounted on the fixed base body; the eccentric rotary frame is connected with the rotary driving part, and the rotary axis of the eccentric rotary frame is parallel to the central axis of the outer gear ring; the transmission rolling ring forms a first ring part and a second ring part, the second ring part is provided with an output tooth part, the outer side of the eccentric rotary frame is in rubbing fit with the inner side of the first ring part, the outer side of the first ring part is provided with a first outer tooth part, the first outer tooth part is meshed with the first inner tooth part, and the tooth number of the first outer tooth part is smaller than that of the first inner tooth part; and the output gear ring is meshed with the output tooth part of the second ring part, according to the small-tooth-difference speed reducer, the reduction ratio of a single-stage speed reducer is greatly improved, and the size of the speed reducer is greatly reduced.

Description

technical field [0001] The present application relates to the technical field of reducers, and more specifically, to a reducer with few differential teeth. Background technique [0002] The reducer is an important core component applied to the output end of the motor. The reducers used in robots are mainly RV reducers, harmonic reducers, planetary reducers, worm gear reducers, and reducer mechanisms composed of synchronous belts. The main purpose of the reducer is to convert the high speed and small torque of the motor, reduce a certain speed, and obtain a larger output torque. Traditional reducers are more difficult to manufacture and have higher manufacturing precision. The representative ones are RV reducers and harmonic reducers; traditional reducers rely heavily on manufacturing materials, such as the flexible wheel deformation material of harmonic reducers . There is a transmission gap in traditional reducers, such as planetary reducers. The design of the tradition...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a gear reducer with few differential gears, aiming to solve the technical problems of the reducer in the prior art that the structure size is large and it is difficult to achieve a single-stage reduction to achieve a large reduction ratio

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