DIFFERENTIAL GEAR SYSTEM OF A VEHICLE FOR PREVENTING TORQUE BIAS RATIO FROM BEING FIXED RANDOMLY BY SELECTING THE DIAMETERS OF EACH PITCH CIRCLE OF FIRST AND SECOND GEAR UNITS

摘要

PURPOSE: A differential gear system of a vehicle is provided to freely choose torque bias ratio by engaging first and second gear units with an internal gear and a sun gear, respectively and selecting properly the diameter of each pitch circle of first and second gear units. CONSTITUTION: A differential gear system(1) of a vehicle is composed of an internal gear(4) disposed rotatively; a sun gear(5) installed rotatively by matching the internal gear with an axial line; and a planetary gear(6) arranged between the internal gear and the sun gear to revolve or rotate and engaged with the internal gear and the sun gear. The planetary gear has first and second gear units(61,62) with different diameters of pitch circles. The first gear unit is engaged with the internal gear and the second gear unit is engaged with the sun gear.