摘要
以浮动平底推杆等宽凸轮机构为研究对象,通过引入往程、返程、向径标定线和等宽映射区间套等概念,阐述了往程/返程运动角、远近休止角的内在规律性关系,运动学尺寸、行程幅值和初位参数间的内在特征关系,输出摇杆返程角位移规律的求解,主副平底容许选择区段和凸轮基圆半径取值域确定,凸轮基圆半径、压力角和宽度的变化规律等,揭示了等宽凸轮机构的设计蕴含着诸多的异质性内涵。还对等宽凸轮机构、共轭凸轮机构进行了比较,得到了两种形锁合机构相同点、差异点。最后给出等宽凸轮机构的一个综合算例。
This paper took the constant-breadth cam mechanism with floating flat faced pushrod as research object.The concepts of rise and return travel,radius-making line,and width mapping interval set were introduced.The intrinsic regularity relationship of the angles of rise/return and farthest/nearest dwell angle,and the characteristic relationship of kinematic sizes,amplitude of rise travel,and the beginning parameters were discussed in detail.Then,the displacement function of the rocker was solved.The selected interval of the flat and the range of base circle radius,pressure angle,and width were presented.They reveal that the design of this mechanism contained a special,complex and profound content.The comparison of constant-breadth cam and conjugate cam were presented,which deepen the understanding of similarities and differences of the two kinds of shape lock mechanism.A mechanism synthesis example of this mechanism was displaced.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第4期310-315,共6页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(51175224)
福建省自然科学基金资助项目(2010J01302
2006J0169)
关键词
等宽凸轮机构
浮动平底推杆
向径标定线
等宽映射区间套
机构最优解
Constant-breadth cam mechanism
Floating flat faced pushrod
Radius-making line
Width mapping interval
Optimal solution
