The power is provided by the electrical motor, the piston actuation carries out by the ball bearing spiral mechanism, the piston direction alternation is controlled by two magnetic powder clutches, the entire control system is completed by PLC.

• 动力由电机提供，活塞的驱动由滚珠螺旋机构来执行，活塞的换向由两个磁粉离合器和PLC来控制。