Analysis Of Transmission Precision For RV Reducer

The characteristics of RV(Rotary Vector) gear reducer is tight structure, long service life, large transmission ratio, high transmission efficiency and precision, for which it’s widely used in robotics, aerospace, instrumentation and other high precision equipment. The paper analyzed the influence of the geometric error of RV gear reducer’s key parts to transmission precision, designed prototype to test, Put forward the principle of precision design, and provide theoretical basis for manufacturing installation error.The main content is as follows:① Analysising the influence of different design parameters(eccentricity, the number of needle teeth and the radius of needle wheel) to the cycloid according to the structure characteristics of the RV reducer and transmission principle, and completed the structure design of RV reducer prototype and strength analysis.② Based on single factors of error superposition method, considering the involute gearing,cycloidal pinwheel transmission, and the planet carrier output mechanism of the error, transmission error and backlash of the RV reducer were analyzed, find out the influence on the transmission accuracy of error factors, summed up the RV reducer structure design and accuracy analysis, the development of cad software.③ Consider the manufacturing and installation error factor of RV reducer key components, Dynamics simulation and analysis of single factor and more errors coupling dynamic return difference of RV reducer, the influence of the dynamic transmission accuracy, The principle of precision design is proposed.④ The research in the coordinate measuring instrument, The cycloid tooth profile and the crankshaft of the RV reducer processing method for measuring error, The post-processing program of measured data, it is concluded that the cycloid gear root from the deviation and pitch deviation, accumulation of pitch deviation, And the radius error of crankshaft paragraphs, eccentric error and phase error, etc.⑤ The meshing characteristics of the RV reducer prototype, poor back, transmission error and experimental study, verify the accuracy of the finite element contact analysis and dynamic simulation precision, provide basic experiment data for the RV reducer follow-up studies.