行星线齿变速器基于装配误差的传动精度分析

针对一种以线齿轮为核心传动元件的行星线齿变速器,研究了装配误差对其传动精度的影响。介绍了该行星线齿变速器的结构组成及不同传动方案的特点,建立了轮系空间啮合坐标系,以及啮合时线齿行星轮、线齿太阳轮以及外线齿圈的参变量之间的定量关系;分析了外线齿圈与线齿行星轮之间以及线齿行星轮与线齿太阳轮之间的角度误差和位移误差的产生原因,并采用齿面接触分析方法(TCA),对行星线齿变速器的装配误差模型进行了数值分析。结果表明,在行星线齿变速器的装配中,绕水平轴旋转的角度误差、外线齿圈纵截面内的位移误差以及线齿行星轮横截面内的位移误差,对传动精度有较大影响。研究对该行星线齿变速器的设计和装配具有指导意义。

Transmission Precision Analysis of Planetary Line Gear Transmission based on Assembly Error

Focusing on a planetary gear transmission that uses line gear as core transmission elements,and the influence of assembly errors on its transmission precision is studied.The structural composition of the line gear transmission and the characteristics of different transmission schemes are analyzed,the space meshing coordinate system for the gear train are established,and the quantitative relationship of the parameters at the meshing moment is established among the sun line gear,the outer ring line gear and the planetary line gear.The causes of the angle error and displacement error are analyzed,both between the planetary line gear and the sun line gear and between the outer ring line gear and the planetary line gear.Tooth Contact Analysis(TCA)is subsequently adopted to carry out the numerical analysis of the assembly errors model for the line gear transmission.The results show that,among assembly errors of the planetary gears,the angular errors of its rotation around the horizontal axis,the displacement errors in the longitudinal section of the outer ring line gear,and the displacement errors in the cross section of the planetary line gear,are of more effect on its transmission.That is of significant to design and assembly of the planetary gears.