Differential mechanism of a four-wheel driving apparatus for vehicles

A differential mechanism of a four-wheel driving apparatus for vehicles having a planetary gear and transmitting driving torque from an input shaft to a front wheel driving shaft and a rear wheel driving shaft in a distributing manner, comprising:

• a first spline rotated by the driving torque from said input shaft,
• a second spline connected so as to be integrally rotatable with a sun gear of said differential planetary gear,
• a third spline connected so as to be integrally rotatable with a carrier,
• a fourth spline provided on an outer circumferential surface of a ring gear, and
• a differential change sleeve mounted in a radially outward direction from each of said first, second, third and fourth splines for axially sliding movement between two positions, said first and fourth splines positively connected with each other at a first position of said change sleeve and said first, second and third splines positively connected with each other at a second position of said change sleeve.