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Prediction of Tooth Root Bending Stress in Hypoid Gears for Drivetrain

Article of Honda R&D Technical Review Vol.22 No.1

Summary

A technology for the prediction of tooth root bending stress that considers changes in the gear meshing position has been developed to help enable accurate evaluation of the tooth root strength of hypoid gears used in drivetrains. The gear sets in actual vehicles are supported by a number of other components, and deformation of these components in operation produces different gear meshing positions to those observed when the gears are unloaded. These changes in meshing position increase the stress on the tooth roots. A hypoid gear tooth root stress simulation that considers the stiffness of the supporting components was therefore developed. This technology displayed a good correlation with measurement results for stress distribution along the tooth bottom in the direction of the tooth width and for maximum stress values. Strength evaluations based on tooth root stress obtained in this way also increased the accuracy of prediction of the lifespans of hypoid gears.

Reference

(1) Wang, Z., Kubo, A., Aoki, S., Takeda, K., Gosselin, C., Nonaka, T.: Tooth Root Stress Analysis of Hypoid Gears (1st Report, Introduction of Predicting Method for the Tooth Root Stress), Transactions of The Japan Society of Mechanical Engineers (C), Vol. 66-652, p. 212-220 (2000)
(2) The Gleason Works: Bending Stresses in Bevel Gear Teeth (1981)
(3) The Gleason Works: Passenger Car Drive Axle Gear Design (1970)
(4) Takamura, S.: Application of Non-contact Measurement Technology to Precision Parts, Honda R&D Technical Review, Vol. 17, No. 2, p. 38-43
(5) Hiraoka, M., Tomita, K., Suzuki, S., Iijima, Y., Sasahara, C.: Development of Stiffness Analysis Technology for
Transmission Housing, Honda R&D Technical Review, Vol. 14, No. 2, p. 115-122
(6) Tateno, Y., Furui, Y., Norita, K.: Prediction of Mesh Misalignment of External Gear for Transmission, Honda R&D Technical Review, October, 2007, p. 104-109

Author (organization or company)

Takemasa OKANO(Automobile R&D Center)、Shinji KAWAI(Automobile R&D Center)、Shigeru TAKAMURA(Automobile R&D Center)、Takeshi HORI(Automobile R&D Center)、Yoshinari OKADA(Automobile R&D Center)、Takafumi SHODA(SANWA KOKI Co.Ltd.)、Naoki IKENAGA(SHOWA CORPORATION)

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