Design And Optimization Of Load Sharing Structure Of Flexible Pin Shaft With Variable Stiffness And Reduced Inclination For Planetary Transmission

Planetary transmission is widely used in the area of ship,aerospace,automobile,machine tool and other industries.However,due to the manufacturing and assembling installation errors,the load distribution among the planetary gears of planetary gear system is usually uneven,so it is necessary to take load sharing measures to make each planetary gear bear the same load.At present,the flexible pin is mainly used in the load sharing,and the elastic deformation of the double cantilever beam offsets the manufacturing and assembling error.However,this structure also has the problems of the planetary shaft inclination and small deformation under small load.Therefore,this paper proposes a new flexible pin structure with variable stiffness and a new shaft sleeve structure with reduced inclination angle.This study optimizes the structural parameters of the flexible pin through the theoretical and finite element analysis.Then,the results of theoretical calculation and finite element simulation are verified by experiments.The research contents are as follows:1.According to the disadvantage of the original flexible pin,three new types of flexible pin are proposed.The flexible pin are reducing the inclination angle of the planetary,the flexible pin with variable stiffness and the flexible pin which has variable stiffness and reduces the inclination angle of the planetary.The mechanical model of the three new types of flexible pin the original flexible pin are established,then the mechanical properties of each flexible pin are studied by MATLAB software.2.The parameters of the flexible pin are dimensionless variables,and then the dimensionless variables are the factors of orthogonal experiments,and finite element simulation is carried out with ABAQUS software to obtain the best performance.The structure optimization of three kinds of the flexible pin is carried out,and the single factor influence analysis of some key factors is carried out.3.According to the results of orthogonal experiment,with the structure with best performance of the flexible pin are reducing the inclination angle of the planetary,the flexible pin with variable stiffness and the flexible pin which has variable stiffness and reduces the inclination angle of the planetary and the original flexible pin.Four kinds of flexible pin are tested to obtain the deformation and the inclination angle.Finally,comparing the flexibility,inclination angle and stress of four kinds of flexible pins,it is shown that the three new types of flexible pins have advantages over the original one,and the correctness of theoretical analysis and finite element simulation is verified.