All metal two-direction straight line motor

The utility model relates to an all metal two-direction straight line motor which comprises an over current protector. The utility model is characterized in that two sets of coils of which winding directions are different are arranged in a metal casing. The two sets of coils are in a staggered arrangement and are coaxially installed. An iron core sheet is connected in parallel to a wire loop and one end of each of the two sets of coils and is connected with a main loop. The other end of each of the two sets of coils is connected with each of both ends of a capacitor C respectively. Both ends of the capacitor C are respectively connected with both ends of a transfer switch which is connected to a power supply. A metal rod drills through the center of the coils and the wire loop. The utility model has the advantages of simple structure and flexible and convenient use.