Equivalent Conversion Calculation of Straight Bevel Gear Mesh Stiffness

Based on analyzing the defects of the usual equivalent conversion methods, the paper presents a new equivalent conversion method for mesh stiffness calculation of straight bevel gears of the small teeth number and diameter. By means of comparison among the different calculation methods, the conclusions can be obtained as follow: The straight bevel gear´s mesh stiffness value calculated by the new equivalent conversion method and Yisikawa formulae improved is more enhanced obviously than that calculated by the usual equivalent conversion methods and Yisikawa formulae, and its change trend is closer to the numerical calculation value than which of the SBGMS value calculated by the usual equivalent conversion methods and Yisikawa formulae.