Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 9: 106 - 116

DOI: https://doi.org/10.12141/j.issn.1000-565X.240586

Mechanical Engineering

Active Tooth Surface Design and Performance Optimization of High Reduction Ratio Hypoid Gears

  • JI Shuting ,
  • LI Jiahao ,
  • ZHANG Yueming
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  • College of Mechanical and Energy Engineering，Beijing University of Technology，Beijing 100124，China
纪姝婷（1988—），女，副教授，博士生导师，主要从事工业机器人精密减速器设计及齿廓修形理论研究。E-mail： jishuting@bjut.edu.cn

Received date: 2024-12-18

  Online published: 2025-03-21

Supported by

the National Key R & D Program of China(2023YFB4704200);the National Natural Science Foundation of China(51905009);the Key R & D Program of Hebei Province(20311802D)

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Abstract

To enhance the comprehensive transmission performance of hypoid gears with high reduction ratios, this paper proposed a design method for significantly inclined contact lines based on active tooth surface design techno-logy. Firstly, multiple tooth surface imprints with varying degrees of contact line inclination were preset, with specified values for the semi-major axis of the contact ellipse and the length of the contact trace. The pinion conjugate tooth surface was then modified with a parabolic shape to achieve a tooth surface that meets the preset parameters. Subsequently, by integrating Tooth Contact Analysis (TCA) and Load Tooth Contact Analysis (LTCA) techniques, the amplitude of transmission error (ATE), amplitude of loaded transmission error (ALTE), tooth surface load distribution, root bending stress amplitude, and tooth surface flash temperature amplitude were obtained for each tooth surface. The influence of variations in contact trace length on these performance parameters was then analyzed. Finally, a target modified tooth surface was selected, and its comprehensive performance was analyzed and compared with that of the original tooth surface. A case study demonstrates that for a hypoid gear pair with a gear ratio of 5∶75, under conditions of highly inclined contact trace on the tooth surface, a longer contact trace length leads to lower contact stress, as well as reduced root bending stress and flash temperature on the tooth surface. The target tooth surface exhibits weakened edge contact, a 12.0% reduction in maximum root bending stress, more uniform contact stress distribution, and a 6.3% decrease in peak flash temperature. As a result, the scuffing load-carrying capacity is enhanced. Overall, the modified target tooth surface exhibits superior contact performance, better load-carrying capacity, and significantly enhanced comprehensive transmission performance.

Key words： high reduction ratio hypoid gear; active design; modification; load tooth contact analysis; loaded transmission; tooth flash temperature

Cite this article

JI Shuting , LI Jiahao , ZHANG Yueming . Active Tooth Surface Design and Performance Optimization of High Reduction Ratio Hypoid Gears[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(9) : 106 -116 . DOI: 10.12141/j.issn.1000-565X.240586

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