引言气扳机的冲击机构种类很多,其中摆块式冲击机构是继钢球凸轮式冲击机构之后发展起来的一种较先进的冲击机构,它具有结构简单、工作可靠、每次冲击能大等优点。可由气动发动机直接驱动,不需减速装置,因而输出转速较高。摆块式冲击机构在国外气扳机中应用较多,在国内气板机中也有普遍采用的趋势。据了解,目前使用摆块式冲击机构的国产气扳机,基本上是按国外样机仿制的,缺乏一套理论设计方法。因此,很有必要研究这一课题。本文只是对摆块式冲击机构的初步探 Introduction There are many kinds of impact mechanism of pneumatic trigger, of which pendulum impact mechanism is a kind of advanced impact mechanism developed after steel ball cam impact mechanism, which has the advantages of simple structure, reliable operation, large impact energy per impact . It can be directly driven by a pneumatic engine without a reduction gear so the output speed is high. Pendulum block impact mechanism used in foreign gas trigger more commonly used in the domestic gas plate machine trend. It is understood that the current use of pendulum-type impact mechanism of domestic gas trigger, basically imitation of foreign prototype, the lack of a theoretical design. Therefore, it is necessary to study this topic. This article is only a preliminary study of pendulum impact mechanism