Analysis And Study On The Bearing Characteristic For RV Reducer

With the continuous improvement of the level of industrial automation,the demand for industrial robots is increasing and more serious.And the RV reducer as the key components of the industrial robot is on the basis of cycloid pinwheel precision transmission,and widely used in the field of high precision,with the higher requirements on the smooth movement,high-speed,efficiency and overload,the analysis on the bearing of RV reducer motion is of more significance.The theoretical basis for the design and manufacture of RV reducer is not perfect at present,and the situation that foreign products occupy the domestic market has not been changed,in this paper,it’s load-bearing characteristics will be analyzed by the virtual prototype technology and finite element software and provide certain theoretical basis for parametric modeling of the RV reducer bearing motion analysis.The main tasks of this paper are as follows:(1)Firstly,the transmission principle of RV reducer is introduced and its theoretical transmission ratio is calculated.Based on the analysis of the principle of cycloid tooth profile,the standard equation of cycloid tooth profile is derived.For the requirements of lubrication,easy disassembly and installation requirements,the cycloid gear design is optimized,in meet the requirements of minimum return difference,the negative of the isometric plus negative shift way to optimize and modify the cycloid gear.(2)Parameterized modeling of RV-40E makes use of Solid Works and carries on the dynamic simulation in Adams,it is concluded the transmission component angular velocity,angular velocity and the theory of comparative analysis,and verify each transmission component movement relation and the correctness of building the virtual prototype.(3)Most of the studies on RV transmission have not considered the shape of the cycloid gear,which causes a great error in the actual working conditions.Based on the meshing theory of a gap,the influence of the initial gap cycloid gear modification is considered,the initial gap and elastic deformation is accurately calculated by using MATLAB software after modification of the cycloid gear,the amount of the related meshing teeth is identified,and finally the result is verified in the finite element software ABAQUS.(4)The stress distribution among cranks haft,cycloid wheel,needle tooth is analyzed,static equilibrium equation of cycloid gear and the crankshaft is listed,the stress of cycloid gear the crankshaft by turning arm bearing role changes is calculated by using the MATLAB software,at the same time the changing process of tress of the support bearings is concluded by the use of crankshaft balance equation.The static analysis of the strength and torsion are carried out in ABAQUS.