Profile Modification Of Cycloidal Gear And Design Of RV Reducer

RV reducer is widely used in the field of industrial robots.It has the characteristics of small size,light weight,high accuracy and high efficiency.In recent years,the research and development of RV reducer in our country has been promoted because of the increasingly widespread application of robots.The RV reducer is composed of involute planetary gear drive mechanism and acycloid pin gear drive mechanism.These two organizations are relatively independent,and they interact and influence each other.In order to design geometric parameters of each component for RV reducer of the mutual constraints between the constraints conditions,involute planetary gear transmission and cycloid planetary,transmission mechanism were studied.In the condition of satisfying constraints,process was designed for selecting the parameter of nvolute planetary transmission mechanism and cycloidal pin wheel planetary transmission mechanism.finally the geometric parameters of each transmission component was calculated.In order to compensate the compensation of cycloid wheel drive parts of the processing error,thermal deformation,deformation and lubrication of oil film required space,it is necessary to modify the cycloidal gear profile.To make sure that there is enough tooth side clearance between the cycloid gear profile and needle wheel profile.Based on the deep study of the traditional method of the modification of the cycloidal gear tooth profile,a new algorithm based on the secondary envelope theory of the cycloidal gear tooth profile is proposed,which greatly improves the accurate calculation of modification.The tooth profile segmentation method based on CNC grinding machine is proposed,which avoids the coupling problem between the working profile modification and the addendum modification.providing a greater free space for the cycloidal gear profile modification design.After the completing of the overall design of the RV reducer,the axial dimension relation and radial dimension relation of each part of RV reducer are studied respectively,and the motion interference problem of some components is solved.The key component’s strength are checked,and the 3D model of the reducer is established.