四根刚性杆件(或相当于杆件),用一定的方式连接在一起,如用铰链铰接或用导轨连接,就组成了四连杆机构,简称四杆机构。我们把刚性构件之间的,起到限制构件间相对运动作用的活动连接,称为“运动付”。显然,四杆机构有四个运动付。有四杆和四付,是四 Four rigid rod (or equivalent to the rod), connected together in a certain way, such as hinged or hinged with a rail connection to form a four-bar linkage mechanism, referred to as the four-bar mechanism. We link the activities between rigid members, which act to limit the relative movement between the members, and call it “movement pay.” Obviously, the four-bar mechanism has four payouts. There are four and four pay, four