四杆机构中关于极位夹角定义的讨论

The Discussion about the Definition of Extreme Positions Angle in Four Bar Linkage Machanism

在实际生产中,四杆机构常利用急回特性缩短非生产时间,提高效率.而极位夹角的存在是机构具有急回特性的一个明显标志.通过对四杆机构中极位夹角一般性定义的讨论和举证,总结出极位夹角的广义定义.

Practical application, the quick return characteristic of four bar linkage mechanism is utilized to shorten non-productive time and increase efficiency. The existence of extreme positions angle is a significant mark for the mechanism with quick return characteristic. In this paper, discussion and demonstration is performed about generality definition of extreme positions angle of four bar linkage mechanism. A generalized definition about extreme positions angle is concluded.