A Study on Calculation of Optimum Gear Ratios of a Two-Stage Helical Gearbox with Second Stage Double Gear Sets

The article focuses on finding optimum calculation of the gear ratios of a two-stage helical gearbox with second stage double gear sets. To obtain the optimum gear ratios, an optimization problem was established. Besides, the gearbox length was chosen as the objective function of the problem. In addition, attention was paid on to the influences of the input parameters such as the total gearbox ratio, the wheel face width coefficient, the allowable contact stress and the output torque. To explore the effects of these factors on the optimum gear ratios, a simulation experiment and then a computer program were constructed. The findings reported some models for obtaining the optimum gearbox ratios accurately in a simple way.