实际应用中,常常要用到这样一种执行机构,即执行零件可以按规定的等分(或不等分)要求间歇分度,也可以上下往复运动,两个动作又必须在一个往复过程中完成。实现这种特殊的运动要求,按专统的设计方法,会使整个机构组合变得较复杂,操作也不方 In practice, it is often necessary to use such an actuator, that is, the execution part can be intermittently indexed according to the required equal (or unequal) requirements, and can reciprocate up and down, and the two actions must be performed in a reciprocating process carry out. To achieve this special movement requirements, according to the design of the overall system will make the entire organization more complicated, the operation is not square