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

^#Communicated by Dr. G. Muthuveerappan.

Abstract

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.

Keywords:

• Asymmetric tooth profiles
• Conventional gear design
• Direct gear design
• FEM
• Internal spur gear
• Optimum design

Notes

Input data: z _p  = 20, z _g  = 60, L _ap  = 0.6/z _p , L _ag  = 0.6/z _g , m = 1.0, ε _d  = 1.8 and α _apd  = 36°.

Input data: z _p  = 20, z _g  = 60, L _ap  = 0.6/z _p , L _ag  = 0.6/z _g , m = 1.0, ε _d  = 1.4 and x _p  = x _g  = 0.

^#Communicated by Dr. G. Muthuveerappan.