Meshing Performance Analysis And Optimal Design Of RV Reducer Reducer

This subject takes the gear transmission system of a certain type of RV550 E reducer as the research object,and carries out research on its transmission meshing performance and optimization method.The main contents are as follows:(1)The performance requirements of each joint reducer of a 6-degree of freedom serial industrial robot were analyzed,and two methods of cycloidal tooth profile generation based on the generation method,the effect of modification on the tooth profile shape,and the differential relationship between various transmission components were studied.The calculation equation for the backlash of cycloidal pin wheel transmission under the combined modification action was established,laying a foundation for subsequent calculation and analysis.(2)Based on the principles of cycloidal transmissi on and coordinate transformation,TCA modeling is performed on the secondary cycloidal pinwheel transmission mechanism of the RV reducer,and all point information during its meshing process is obtained.By introducing loads and combining Hertz nonlinear contact theory,an LTCA model is established to obtain time-varying meshing information such as backlash changes,load distribution,contact stress distribution,tooth surface stress distribution,and time-varying meshing stiffness of single and multiple teeth during the meshing process.(3)According to the characteristics of RV transmission,the reducer is disassembled into a first stage involute planetary reduction mechanism,a crank arm mechanism,a second stage cycloidal planetary transmission mechanism,an d a planetary carrier,and force balance relationships are established for each component.The web energy method is used to calculate the deformation of the first stage involute planetary reducer,and the material mechanics method is used to calculate the deformation of the crank arm.On the basis of LTCA,the web energy method is combined to account for the deformation of the gear tooth matrix and recalculate the results of the cycloidal pinwheel transmission.Therefore,a time-varying stiffness calculation model for each component is established to analyze the changes in the output torque angle of the entire machine caused by the deformation of each component,Finally,a time-varying torsional stiffness calculation model for the entire RV reducer was obtained.(4)Based on the theory of cycloidal transmission,put forward a new type of cycloid wheel profile optimization method,to distinguish the tooth profile for the working section and the working section,derive the cycloid wheel pressure Angle equation and study the influence of the parameters of the transmission pressure Angle change,combined with the genetic algorithm for working parameters optimization,and the optimal results rounded test.Using SOLIDWORKS,HYPERMESH,and ABAQUS software for joint simulation,a finite element analysis model of the cycloidal needle gear mechanism was established.The tooth contact situation was analyzed from both Mises stress and contact stress,and the feasibility of this optimization method and the correctness of the a forementioned LTCA model were verified.