Large-reduction-ratio external meshed hollow shaft planetary reducer

Abstract

The invention relates to the technical field of precision machinery, in particular to a large-reduction-ratio external meshed hollow shaft planetary reducer. The large-reduction-ratio external meshed hollow shaft planetary reducer comprises an input sun wheel, a fixed sun wheel, duplex planetary wheels, an end cover, a shell, a needle bearing I, a needle bearing II, an end cover supporting bearing and a shell supporting bearing. The working mode is based on the external meshed differential planetary reduction principle; the input sun wheel and the fixed sun wheel are concentrically mounted and are supported by the needle bearing I and the needle bearing II; the three groups of duplex planetary wheels are mounted on the shell and the end cover, and are respectively meshed with the input sun wheel and the fixed sun wheel; the end cover is connected with the input sun wheel through the end cover supporting bearing; and the shell is connected with the fixed sun wheel through the shell supporting bearing. According to the large-reduction-ratio external meshed hollow shaft planetary reducer, all gears are externally meshed, so that finish machining is easy to implement; and due to a hollow shaft structure, the large-reduction-ratio external meshed hollow shaft planetary reducer is easy to mount, and varying of the reduction ratio can be realized.

Description

technical field [0001] The invention relates to the technical field of precision machinery, in particular to an external meshing hollow shaft planetary reducer with a large reduction ratio. Background technique [0002] In the industrial field, the reducer plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator. The planetary reducer has been widely used in the industrial field because of its light weight, small size, large transmission ratio range, high efficiency, stable operation, low noise and strong adaptability. [0003] The planetary reducer is composed of a planetary gear, a sun gear, and an inner ring gear. The planetary gear rotates around the sun gear in the inner ring gear, decelerates the high-speed rotation of the sun gear, and outputs it through the planet carrier. In the manufacturing process of planetary gears, the machining of inner ring gears has always been a difficult problem in this field. No...

AI Technical Summary

Problems solved by technology

In the manufacturing process of planetary gears, the processing of inner ring gears has always been a difficult problem in this field. Not only the processing speed is slow, but also it is difficult to finish machining after heat treatment

In addition, in order to obtain a large reduction ratio, the planetary reducer usually requires multi-stage cascading, which increases the overall size and weight.

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