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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第9期    总第313期    2020年9月

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文章编号:1672-7207(2020)09-2471-09
考虑柔轮杯体变形的谐波传动空间共轭齿廓设计与分析
朱飞鸿1,杜雪松1,宋朝省1,朱才朝1,杨勇2,廖德林2

(1. 重庆大学 机械传动国家重点实验室,重庆,400044;
2. 深圳市大族精密传动科技有限公司,广东 深圳,518057
)

摘 要: 提出一种精确描述凸轮波发生器谐波传动刚柔轮之间复杂空间变形的方法,该方法基于直母线假定考虑柔轮空间变形带来的中面曲线变化和柔轮齿空间方位变化等因素搭建谐波传动运动学模型。以椭圆凸轮为例,利用数值法计算柔轮空间共轭齿廓,研究柔轮杯体空间变形所产生的空间转角及其对啮合过程中的共轭区域、柔轮齿运动轨迹和齿面啮合迹线带来的特殊影响。研究结果表明:柔轮齿空间方位转角不可忽视,其中切向位移引起的转角变化更加剧烈,所得柔轮齿廓共轭区域显著增大,齿圈轴向各截面均无干涉且存在两点啮合,啮合接触状况更优。

 

关键字: 空间共轭;空间齿廓;谐波传动;双圆弧;椭圆凸轮

Design and analysis of space conjugate tooth profile of harmonic drive considering deformation of flexspline cup
ZHU Feihong1, DU Xuesong1, SONG Chaosheng1, ZHU Caichao1, YANG Yong2, LIAO Delin2

1. State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China;
2. Shenzhen Han''s Motion Technology Co. Ltd., Shenzhen 518057, China

Abstract:A method for accurately describing the complex space deformation between circular spline(CS) and flexspline(FS) of harmonic drive(HD) with a cam wave generator was proposed. The method was based on the assumption of the straight bus, considering the variation of the mid-surface curve caused by the deformation of the FS and the spatial orientation change of the FS teeth, and the kinematics model of the HD was built. Taking the elliptical cam as an example, the space conjugate tooth profile of the FS was calculated by numerical method. The space rotation angle generated by the deformation of the flexspline cup and its conjugate area, the relative movement trail of FS and the contact path on FS tooth surface during the meshing process were studied. The results show that the azimuth rotation angle of the FS tooth considered in this paper cannot be ignored, and the change of the rotation angle caused by the tangential displacement is more severe. The conjugated region obtained is significantly increased, and the cross-section of the FS has no interference and has two-point meshing, and the meshing contact condition is better.

 

Key words: space conjugate; space tooth profile; harmonic drive; double-circular-arc tooth profile; elliptical cam

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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