联轴器属于机械通用零部件范畴，用来联接不同机构中的两根轴（主动轴和从动轴）使之共同旋转以传递扭矩的机械零件。在高速重载的动力传动中，有些联轴器还有缓冲、减振和提高轴系动态性能的作用。联轴器由两半部分组成，分别与主动轴和从动轴联接。一般动力机大都借助于联轴器与工作机相联接，是机械产品轴系传动最常用的联接部件。20世纪后期国内外联轴器产品发展很快，在产品设计时如何从品种甚多、性能各异的各种联轴器中选用能满足机器要求的联轴器，对多数设计人员来讲，始终是一个困扰的问题。-General Machine Components category couplings are used to connect two shafts of different institutions (the drive shaft and the driven shaft) so that transfer torque to rotate together with the mechanical parts. Overloaded power transmission at high speed, some couplings and buffers, vibration and improve the dynamic performance of the role of shafting. Composed by the two halves of the coupling, respectively, and the drive shaft and the driven shaft connected. Most of the general power machine coupling means coupled with the working machine is the most commonly used machinery shaft drive coupling parts. The late 20th century has developed rapidly coupling products at home and abroad, in the product design how many varieties, different performance of the various couplings used to meet the requirements of the machine couplings, for most designers is concerned, is always a difficult problem.