Effect of Addendum Modification Coefficient on Bending Strength of Internal Gear

Abstract

An internal gear which meshed with three planet gears in the same bearing condition and was supported through a thin cylinder was chosen as the subject of study. Stresses in profile shifted internal gears whose addendum modification coefficients were x=0.5 and -0.5 respectively were analyzed by the photoelastic method and were compared with those in the standard internal gear investigated in a previous work and consequently the following were revealed. The effect of an addendum modification on the fillet stresses produced in the internal gear increases with a decrease in both the rim thickness the number of teeth of internal gear.