Design of Harmonic Drive with Double-Circular-Arc Tooth Profile

被引：0
|
作者：
Yang Y. [1 ]
He Q. [1 ]
Xie R. [1 ]
Zhou G. [1 ]
机构：
[1] School of Mechanical Engineering, Tianjin University, Tianjin
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2023年 / 56卷 / 04期
基金：
中国国家自然科学基金;
关键词：
double-circular-arc tooth profile; harmonic drive; kinematics analysis; meshing characteristic;
D O I：
10.11784/tdxbz202204042
中图分类号：
学科分类号：
摘要：
This study proposes a method for designing the double-circular-arc tooth profile of the harmonic drive，considering the relative motion characteristics between flexspline and circular spline teeth to address the problems of complex parametric characterization and low correlation between circular-arc and design parameters．First，according to the working parameters and deformed neutral curve function，the moving trajectories of the common tangent point of the flexspline tooth profile are analyzed for the fixed circular spline and fixed flexspline．On this basis，the maximum tangential displacement of the flexspline tooth is calculated as the parameter reference of the tooth top arc，and the continuous conjugate conditions for the top tooth profile are established for designing the obliquity angle of the common tangent point．The effects of the displacement coefficient and the obliquity angle on the conjugate-existing domain are researched with a given tooth thickness ratio and reference diameter．The important parameters of the tooth profile are selected according to the continuous conjugate condition．Secondly，the meshing condition between flexspline and circular spline teeth is demonstrated for the transmission ratios of 80 and 100．The calculation results show that the conjugate tooth profile can mesh continuously without interference. Finally，combined with finite element simulation to check tooth profile meshing characteristics，the extant conjugate domain is 68.31°，the number of conjugate teeth pairs is 37，the backlash is less than 10 µm，and the finite element simulation and numerical example are consistent，validating the design method． © 2023 Tianjin University. All rights reserved.
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页码：346 / 354
页数：8
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