Strength Design of e-PGS Pinion Considering Dedendum Modification

Abstract

In this study, the gear strength design was conducted, considering dedendum modification to prevent premature tooth contact and minimize unfavorable transmission error for the external pinwheel gear set (e-PGS) system. The distribution of loads of the tooth contact regions was quantified by introducing the load-sharing factor. In addition, the specific sliding, defined as the ratio of the sliding speed to the speed of a transverse profile in the direction tangent to the profile, was analyzed to consider the wear characteristics of the e-PGS pinion. It was confirmed that the increase of the center distance modification coefficient, one of the key design parameters, resulted in reductions in both contact and root bending stresses, as well as the lower specific sliding.