机械科学与技术2025，Vol.44Issue(4)：641-647,7.DOI:10.13433/j.cnki.1003-8728.20230197
超短筒谐波齿轮柔轮筒底装配应力研究
Study on Assembly Stresses in Bottom of Very Short Harmonic Drive
摘要
Abstract
In order to reveal the forming mechanism of assembly stress at the bottom of harmonic gear flexspline of ultrashort cylinder,a spline function is used to express the bending deformation model of the bottom disk of the cylinder,and a theoretical calculation method of assembly stress at the bottom of the cylinder is proposed.The radial,circumferential and axial deformations of flexspline ring are solved by using the semi-moment theory of shell.According to the asymmetric bending model of the bottom of flexspline with center fixed support,the expressions of bending deformation and assembly stress of flexspline cylinder bottom deformation were obtained through boundary conditions and continuous displacement conditions of flexspline cylinder and bottom.The finite element model was established to numerically verify the theoretical calculation method.The comparative study shows that the deflection and normal stress at the bottom of the flexure cylinder are maximum in the long and short axes,and the shear stress is maximum at 45°.The deflection and shear stress of barrel bottom increase with the increasing of polar diameter,while the shear stress decreases with the increasing of polar diameter of barrel bottom.In the assembly state,the principal stress is radial normal stress,and the maximum values of circumferential normal stress and shear stress are 1/3 of the radial normal stress.关键词
超短筒柔轮/筒底变形/筒底应力/参数化柔轮有限元模型Key words
ultra-short flexspline/diaphragm deformation/diaphragm stress/parametric flexspline finite element model分类
机械工程引用本文复制引用
李义福,陈晓霞,邢静忠..超短筒谐波齿轮柔轮筒底装配应力研究[J].机械科学与技术,2025,44(4):641-647,7.基金项目
天津市应用基础及前沿技术项目重点项目(19JCZDJC38700) （19JCZDJC38700）
