The principle and characteristics of cycloidal pinwheel reducer parallel motion shaft less tooth difference transmission The parallel motion shaft less tooth difference transmission is a new type of transmission initiated in my country. The transmission principle is that the planetary gear does not perform cycloid motion, but passes through double crank The gear mechanism guides for circular translation, and has produced single-ring, double-ring, three-ring, four-ring and balanced cycloid reducer (speed-up) and other equipment, respectively won the national invention patent and utility model patent, some products have been Included in industry standards.Compared with the existing main gear transmission methods, this transmission mode has a series of advantages such as simple structure, small size, light weight, large transmission ratio, high transmission efficiency, large bearing capacity, and strong overload capacity. Petroleum, construction, hydraulic and cement, transportation and other industrial fields have been widely used.At the same time, due to its unique characteristics of flexible installation and its own layout, it has advantages that other transmissions cannot replace in some fields. The annual output value has reached hundreds of millions of yuan in recent years, and it has a broad application prospect.However, the transmission of the cycloidal pinwheel reducer has problems such as oscillation and noise, temperature rise and early bearing damage under high-speed and heavy-load conditions, and the problems are more prominent under the conditions of continuous work, heavy load, high speed and large transmission ratio. It has greatly affected its implementation process and has become a key technical problem that needs to be solved urgently.At present, the research on this transmission at home and abroad mainly focuses on its transmission mechanism, kinematics and dynamics analysis and oscillation noise test. The coupled nonlinear oscillation noise analysis of the entire transmission system, the heating mechanism and the design stage of the product's oscillation noise prediction There are few studies on estimation and so on.