Electric power steering column driven by double-cambered-surface cam

The invention discloses an electric power steering column driven by a double-cambered-surface cam. The electric power steering column comprises a motor, a controller of the motor, a bearing, the double-cambered-surface cam, a bearing check ring, a cylindrical needle bearing, a rotating disc, an output shaft, an outer shell, a fixing bolt and a motor shell. The side end of the double-cambered-surface cam is in interference fit with a connector, and a motor connector is connected with the side end, away from the double-cambered-surface cam, of the connector in an engaged mode, so that when the motor connector is driven by a motor and a controller of the motor to rotate, the motor connector can drive the double-cambered-surface cam to rotate through the connector. The cylindrical needle bearing is in linear meshing with the double-cambered-surface cam, so that when the double-cambered-surface cam is stressed to rotate, a cam ridge arranged at the outer end of the double-cambered-surface cam can push the cylindri