Root Stresses of Helical Gears with Higher Pressure Angle

Abstract

The tooth deflection and bending moment at root fillet due to a concentrated load on a gear tooth of long tooth with various pressure angles were calculated by the finite difference method(FDM) and compared with those measured. The approximate equations for the deflection and bending moment due to a concentrated load on a gear tooth of long tooth with various pressure angles were derived. The root stresses of meshing helical gears of full depth and long teeth with higher pressure angles were calculated by using these approximate equations and Kubo and Umezawa's method and compared with those measured. The effects of pressure angle and whole depth on the root stresses of helical gears were clarified.