计算行星轮系速比的方法很多,如相对角速度法,矢量法、力法,速度图法等。在本文中,我们介绍一种方法,它是以刚体绕平行轴旋转时,以体任一点的绝对速度表达式为基础的,当按啮合点列出这一表达式时,解一组代数方程就可以直接得到所需的速比。此法无需多作图,只需绘制机构简图(作图时可不按此例)就可以进行计算。此法仅适用于平行轴的行星轮系。 There are many ways to calculate the planetary gear ratio, such as the relative angular velocity method, vector method, force method, speed map method. In this paper, we describe a method that is based on the absolute velocity expression of a body as it rotates around a parallel axis. When this expression is listed by the meshing point, a set of algebraic equations You can get the desired speed ratio directly. This method does not require more plots, just draw the organization diagram (plots do not follow this example) can be calculated. This method is only applicable to the planetary gear train of parallel axes.