A motor relates to the technical field of electric tools. An iron cover of the motor is positioned on an inner cover. A
gasket, a ball bush and a bush cover are sequentially arranged between the iron cover and the inner cover. A terminal and a carbon button are both installed in the inner cover, an elastic arm is positioned on the carbon button, a
rivet is positioned on the elastic arm, a
fan blade is sleeved on one side of a shaft, an oil changer is positioned on one side of the
fan blade, a limit
washer and an oil prevention
washer are arranged between the
fan blade and the oil changer, a fibber
washer is arranged on one side of a diverter, a punched piece is arranged on one side of the fibber washer, a patent leather line is positioned on the outer side of the punched piece, insulation
powder layers are arranged at two ends of the punched piece, a
copper washer is arranged on one side of the punched piece, a
magnet is sleeved on the outer side of the punched piece, an elastic bow is positioned on the
magnet, a straight bush is positioned in the iron cover, the iron cover is sleeved on the
magnet, and a magnet change ring is sleeved on the iron cover. The motor is small in size, light in weight, large in torque, long in service life, high in safety and capable of saving energy and protecting the environment.