关于曲柄摇杆机构极位夹角的若干命题及其应用  

SOME PROPOSITIONS RELATED TO EXTREME POSITION ANGLE OF CRANK-ROCKER MECHANISMS AND THEIR APPLICATIONS

作　　者：钱瑞明[1] 刘庆运[1] 

机构地区：[1]东南大学机械工程系,南京210096

出　　处：《机械工程学报》2005年第7期80-83,共4页Journal of Mechanical Engineering

摘　　要：针对具有急回特性的Ⅰ、Ⅱ型曲柄摇杆机构,通过深入分析极位夹角与构件尺寸之间的内在关系,获得了Ⅰ型曲柄摇杆机构极位夹角分别小于、等于或大于90°的几何条件以及Ⅱ型曲柄摇杆机构极位夹角一定小于90°的结论,揭示了曲柄摇杆机构设计时作为已知条件的极位夹角和摇杆摆角之间应满足的要求。首次将研究结果综合形成为5个定理,并通过实例说明了这些定理的应用。Based on deeply analysis of inherent relations between the extreme position angle and the link dimensions of type Ⅰ and type Ⅱ crank-rocker mechanisms with quick return characteristics, the geometrical conditions are put forward, by which we can judge whether the extreme position angle of type Ⅰ crank-rocker mechanisms is less than, equal to or lager than 90°, It is proved that the extreme position angle of type Ⅱ crank-rocker mechanism is certainly less than 90°. The relations between the extreme position angle and the angular stroke of the rocker are brought to light, which should be satisfied during the kinematic design of crank-rocker mechanisms. For the first time, the study results are synthesized as five theorems. Several examples are given to show the correctness and applications of these theorems.

关 键 词：曲柄摇杆机构 极位夹角 摇杆摆角 机构设计 

分 类 号：TH112[机械工程—机械设计及理论]