The Finite Element Analysis And Dynamic Simulation Of The Loader Drive Axle

Drive axle is the core part for dynamic transfer system of loader. The design and manufacturing technology of drive axle has not been completely absorbed by domestic enterprises, it also restrict the development of enterprise and industry. Based on the raw data of engine maximum output torque from Weichai power, the size of the drive axle is calculated. Combining with three-dimensional modeling and finite element analysis technology to analysis the bridge shell and check the structural strength of drive axle. This paper consists of two major components.The first part is the finite element analysis of unitized carrier-type axle. A finite element model that can reflect the actual operating characteristics of bridge shell is established. The structural static strength and stiffness under typical conditions is calculated. The stress and strain contours of maximum stress and strain is got, which shows the sufficient strength. According to the source of drive axle vibration excitation, the vibration property of the bridge shell structure is obtained through model analysis, it provide basic reference data for transient analysis. The maximum buckling load and order buckling modal vibration mode of bridge shell is acquired by buckling stability analysis.The second part is contact analysis of gear. A finite element model of Wheel-side reducer planetary gear transmission structure is established. The calculated FKN value 2.5 is determined by the analysis of effect of different FKN on FEA result. The model was confirmed to be reasonable based on the error that is about 6% by comparing the results of the Hertz’s solution. The simulation model of dynamic contact for a planetary gear and a sun gear is established to analyze the time-dependent change of the equivalent contact stress. Based on the research of influence of friction coefficient on dynamic contact analysis, the relation between gear maximum equivalent contact stress under dynamic meshing and the friction coefficient is obtained and the functional relation is achieved by curve fitting.