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Load Distribution and Tooth Root Stress on Pinion Gear in Differential Gear Device (Influence of Deflection of Side Gear Shaft and Bearings)

Hirofumi SENTOKU, Shinya Kawahara

Abstract

Differential gear machine is often used for a car to smooth cornering. For the complexity that four bevel gears in a differential gear device engage at the same time, there are few papers that gathered up an analytic study about load distribution and tooth root stress distribution on bevel gears. In the case that three bevel gears in differential gear device engage at the same time, authors analyzed load distribution and tooth root stress in previous report. However, we did not consider the influence of side gear shafts and bearings in previous report. Therefore, in this study, by using FEM, deflection and stress of side gear which include influence of gear shafts and bearing were investigated and load distribution and tooth root stress distribution were derived. In addition, the crowning was examined and the influence of the crowning were clarified quantitatively.

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Key concepts: Pinion, Spiral bevel gear, Load distribution, Deflection (physics), Bevel gear, Structural engineering, Differential (mechanical device), Bevel