作平面运动滚子从动件形锁合凸轮机构的第Ⅱ类机构综合问题

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形锁合凸轮机构在工程应用中具有广泛性和重要性,在综合的理论方法方面具有复杂性和特殊性。基于＂浮动数轴＂、＂瞬时、整程区间套＂等概念并通过引入＂往程＂、＂返程＂和＂向径标刻线＂等新概念,深入系统地讨论共轭、槽道和等径凸轮等形锁合凸轮机构的第Ⅱ类机构综合问题。研究结果表明：形锁合机构的综合,并非力锁合机构综合的简单组合、叠加,而是蕴含着诸多复杂深刻、特殊独到的异质性研究内涵。以最具典型性、代表性的等径凸轮机构为例,其在往、返程运动角和远、近休止角的内在规律性关系,运动学尺寸、行程与初始位置参数的内在特征关系,输出件返程角位移规律的求解,滚子中心容许选择区段、凸轮理论基圆半径许用取值范围确定等方面,都具有较力锁合凸轮机构来得复杂深刻、特殊独到的研究思想、方法和结论。给出等径凸轮机构的一个综合算例。 Positive-drive cam mechanisms are used in a great variety of applications and are of complexity and speciality in synthesis theory and methods.Based on the concepts ＂floating axis＂,＂instantaneous and whole nested interval＂ and introducing the new concepts ＂go and return travel＂,＂radius-marking line＂,It deeply and systematically researches the second mechanisms task of conjugate-cam,groove-cam and yoke radial cam with roller follower.Research results is as follow： not being simple combination and summation of force-drive cam mechanisms,the synthesis of positive-drive cam mechanisms is of complicated,deep,special and original research cultivation.Regarding the yoke radial cam with roller follower as sample,a series of research thought,research method and research conclusions are obtained.A mechanism synthesis example is displayed.