When the motor is started, its power through the coupling, transmission to the turbine reducer. By slowing the momentum transfer to the adjustable eccentric distance of the eccentric wheel again by an eccentric wheel through the connecting rod, driven pendulum bottom plate reciprocating swing arc, so that to the mine mouth, the cycle of opening and closing, in ore mining above the ore bin, the feeder body cavity and to the mine mouth, again in the uniform of discharged out of the machine to ensure mill evenly feed production.