End face tooth cycloidal-pin wheel pair and nutating reduction gear

Abstract

The invention provides an end face tooth cycloidal-pin wheel pair and a nutating reduction gear. The end face tooth cycloidal-pin wheel pair comprises a cycloidal gear with a cycolidal tooth face anda pin gear with a pin wheel tooth face. The pin gear and the cycloidal gear are engaged in a nutating transmission manner, the included angles between indexing faces of the pin gear and the cycloidalgear and corresponding axes are within the range of 88 degrees-91 degrees, the sum of the two included angles is smaller than 180 degrees, the portions, mutually engaged with each other, of the pin wheel tooth face and the cycloidal tooth face are a pin wheel working tooth face and a cycloidal gear working tooth face correspondingly, and the pressure angle when the pin wheel working tooth face andthe cycloidal gear working tooth face are engaged meets the formula that alpha is larger than or equal to 45 degrees-beta-5 degrees or smaller than or equal to 45 degrees-beta+5 degrees, wherein alpha is the pressure angle, and beta is the frictional angle between the pin wheel working tooth face and the cycloidal gear working tooth face. The nutating reduction device comprises a shell body, theend face tooth cycloidal-pin wheel pair arranged in the shell body, an input mechanism for driving the cycloidal-pin wheel pair to do nutating movement, an output mechanism connected with the cycloidal-pin wheel pair and a torque transmission part for transmitting the torque of the cycloidal-pin wheel pair.

Description

technical field [0001] The present invention relates to a deceleration device, in particular, the present invention relates to a cycloidal pin-wheel pair with end teeth for a nutating deceleration device and a nutating deceleration device using the cycloidal pin-wheel pair with end teeth. Background technique [0002] The nutation reduction gear is a reduction gear that uses nutation transmission. Generally speaking, the gear pairs used in nutating reduction devices mostly use involute tooth profile or cycloid tooth profile transmission, but the transmission efficiency of involute tooth profile is low, and at the same time, tooth profile overlapping interference is prone to occur in the nutating structure , radial interference and other problems; cycloidal tooth profile is prone to tooth profile overcutting, pin-tooth collision and other problems; planetary reducers with large speed ratios have complex structures, are difficult to manufacture and install, and are heavy in qu...

AI Technical Summary

Problems solved by technology

[0004] However, the above solution only doubles the number of meshed teeth in the nutating transmission process, which may not be enough to improve the load-carrying capacity and transmission stability

At the same time, in the above scheme, the double-stage gear still uses the internal bevel gear. However, the internal bevel gear is difficult to realize in the traditional machining, and it is processed by CNC machine tools, and the cost is high.

However, the method of replacing the tooth shape is used for processing. Although the production process is simple, the precision is low.

These defects have become the main factors restricting the development of nutating reduction devices

Images