Parametric Design for the Internal Gear Pairs of Double Ring Reducer Using UG

摘要

The core parts of double ring reducer is the internal gear pairs with small tooth difference. To build the 3D parametric assembly model of the internal matins gears with small tooth difference, the internal variable t of UG is introduced. The roll angle formula between addendum circle and dedendum circle and the corresponding coordinate equations of the involute profile were established. By Law Curve in UG and commands such as Mirror Feature and Extrude etc, the parametric models of inner and external gears and the corresponding assembly model were created separately. The results show the assembly model varies by gear parameters, and do stable basis for the further study on the mechanism.