According to the load sharing mechanism of the series planetary gear train and consideration the effects of manufacturing errors

assembly errors

mesh stiffness and the clearance floating coefficient

the analysis model is set up.The load sharing coefficients of the input stage and output stage are obtained through the calculation.The effect of the gear accuracy grade on the load sharing coefficient is analyzed.The results illustrate that the input stage is much more sensitive of the gear accuracy grade than the output stage.Then the effects of gear mesh stiffness and lubrication of toothed coupling on load sharing coefficient are discussed.The study provides useful theoretical guideline to the design of planetary gear train.