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研究了一种等宽凸轮-连杆组合机构(即作平面复杂运动平底从动件的形锁合式等宽凸轮机构)的设计问题。给出了同向、异向等宽凸轮-连杆机构的基本参数之间的关系,并应用支撑函数法和反转法推导了等宽凸轮廓线的曲率半径、外凸性判据、参数方程、周长及凸轮面积的通用计算公式。根据凸轮基圆半径r0与凸轮宽度W的确定量化关系,得到了确定最小基圆半径{r0}min与宽度W的方法。用该解析法可以设计出廓线外凸且尺寸最小的等宽凸轮,毋需再验证其廓线的凹凸性。
The design problem of an equal-width cam-link combination mechanism (that is, a form-locking equal-width cam mechanism used as a flat complex moving flat follower) is studied. The relationship between the basic parameters of equal-width and width-width cam-link mechanism is given. The curvature radius, convexity criterion, parameters Equation, perimeter and cam area of the common formula. According to the quantitative relationship between the radius r0 of the base circle and the width W of the cam, the method of determining the minimum radius of the base circle {r0} min and the width W is obtained. Using this analytic method, we can design out-of-shape contour cam with the smallest dimension without further verifying the concavity and convexity of the contour.