文献类型：期刊文献

英文题名：A point-contact conjugate hourglass worm drive based on the meshing theory of conjugate tooth surfaces generated by two generating surfaces

作者：Ren, Wen[1];Li, Haitao[1];Xu, Zhaokuan[1];Lei, Baozhen[2];Li, Miaomiao[3]

第一作者：Ren, Wen

通讯作者：Li, HT[1]

机构：[1]China Agr Univ, Coll Engn, Beijing 100083, Peoples R China;[2]Beijing Union Univ, Coll Mech & Elect Engn, Beijing 100101, Peoples R China;[3]Nanjing Univ Aeronaut & Aeronaut, Natl Key Lab Sci & Technol Helicopter Transmiss, Nanjing 210016, Peoples R China

第一机构：China Agr Univ, Coll Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), China Agr Univ, Coll Engn, Beijing 100083, Peoples R China.

年份：2022

卷号：174

外文期刊名：MECHANISM AND MACHINE THEORY

收录：;EI(收录号：20221812055366);Scopus(收录号：2-s2.0-85129092832);WOS:【SCI-EXPANDED(收录号:WOS:000796492800003)】；

基金：Acknowledgements This work was supported by National Key Laboratory of Science and Technology on Helicopter Transmission (Nanjing University of Aeronautics and Astronautics) (Grant No. HTL-O-19G02) and National Natural Science Foundation of China (No. 51775048) . Thanks, Ms. Xiaodi Zhang and Mr. Wenchang Wang for providing the support of manufacturing technology.

语种：英文

外文关键词：Mesh theory; Point contact; Conjugate; Hourglass worm; Two generating surfaces

摘要：To solve the problems of narrow contact area and small contact ratio of the involute cylindrical worm helical gear drive, this paper proposed a point-contact conjugate hourglass worm drive (PCHW drive) based on the meshing theory of conjugate tooth surfaces generated by two generating surfaces. The hourglass worm and worm gear are generated by the helix surface of an involute helical gear and that of an involute cylindrical worm. A mathematical model of the drive is established and a method for solving contact points based on involute pitch point is given. The instantaneous transmission ratio is proved theoretically to be constant and transmission error is zero. The formation mechanism of the conjugate surfaces of the drive is revealed. The results of the tooth contact analysis for a numerical example show that he contact area of this drive is wider, the contact ratio is slightly increased compared to the involute cylindrical worm helical gear drive. Furthermore, the drive is insensitive to manufacturing and assembly errors. A prototype is manufactured and meshing test is performed to verify the theoretical correctness.