本文提出一种等宽曲线的一般参数表达式,由此导出了等宽曲线的闭合条件,切线及曲率连续条件,凸性条件;讨论了直动、摆动两类等宽凸轮机构的设计;提出了凸轮运动规律的边界条件;证明等宽曲线上曲率不连续点处将产生加速度冲击,其避免方法是对凸轮轮廓曲线进行曲率修正。 In this paper, a general parametric expression of constant width curve is proposed, which leads to the closure condition, tangent and curvature continuous condition and convexity condition of equal width curve. The design of two types of equal width cam mechanism is discussed The boundary condition of the cam motion is proved. It is proved that the acceleration impact will occur at the discontinuity of curvature on the contour curve, and the method of avoiding it is to correct the curve of the cam curve.