Study on the Stress at the Root Fillet and Safety for Slipping of Force-fitted Helical Gears

抄録

There are very few studies which deal with force-fitted helical gears hitherto. Considering such a present condition, stresses at the root fillet of gear tooth and safety for slipping at the force-fitted surface were chosen as subjects of this study. Some kinds of force-fitted helical gears were chosen, and stresses at tooth and rim, casued by force-fitting, were examined. Moreover, these experimental results were compared with theoretical ones by the finite element method. The following conclusions were obtained. (1) A practical formula to determine the fillet stresses at Hofer's weakest section and at the center of tooth space of a force-fitted helical gear can be introduced, and these stresses can be easily calculated when gear dimensions and force-fitted conditions are given. (2) Calculation method of dynamic slipping torque has been established.