Copper shell of flat carbon commutator

The utility model discloses a copper shell of a flat carbon commutator. The copper shell comprises a drum-shaped copper billet, wherein convex ribs which are identical to coupling hooks of the commutator in number are uniformly distributed on the barrel-shaped inner wall in the circumferencial direction; a longitudinal slot is formed between two adjacent convex ribs; a center hole and a pluralityof radial open slots are formed at the bottom of the drum-shaped copper billet; the open slots and the longitudinal slot are formed correspondingly and communicated with each other; a bottom circularsurface is uniformly divided into copper sheets which are identical to the coupling hooks of the commutator in number by the open slots; and the copper sheets correspond to convex ribs and are connected with the corresponding convex ribs. After an oil pump motor is assembled by the commutator manufactured by using the utility model, a copper material is not exposed in fuel oil, thereby preventingmethanol and alcohol in the