DIFFERENTIAL DEVICE USING BELT PULLEY FOR VEHICLE

The present invention relates to a differential device using a belt pulley of a vehicle which prevents a torque loss by using the belt pulley and a synchronous ball lamp and enables stable driving of the belt pulley and synchronous ball lamp by driving the belt pulley and synchronous ball lamp with different driving forces when driving road surfaces have different frictional coefficients. The differential device using the belt pulley of a vehicle includes first and second rollers which are connected to a final output shaft of a transmission; first and second pulleys which are connected to the first and second rollers using first and second belts respectively; the synchronous ball lamp which is installed between the first and second pulleys; a motor which provides a rotational force for the synchronous ball lamp; and a control unit for controlling the motor.