A Comprehensive Study on the Asymmetric Internal Spur Gear Drives through Direct and Conventional Gear Design

An optimum design for an internal gear pair for the desired values of input parameters has been attempted through a direct gear design approach using area of existence, which is enclosed between the isograms of a desired contact ratio, a definite pitch point contact, an interference free drive and a fouling free condition. By synthesizing several sets of asymmetric pinion cutters for specific values of input parameters, the respective gear and pinion generated by them have been analyzed for a balanced and lowest possible maximum fillet stress to decide the optimum one. A conventional gear design process has also been suggested with stub tooth concept in this regard.