Transfer case for four-wheel drive vehicle

A transfer for a four-wheel drive vehicle of simplified structure in which speed-reducing and center differential functions are implemented by a single planetary gear set includes an input shaft (1); a first output shaft (2) disposed coaxially with respect to the input shaft; a ring gear (r1) which co-rotates with the input shaft; a first pinion (p1) meshed with the ring gear; a second pinion (p2) in mesh with the first pinion at all times; a carrier (c1) for axially supporting the first and second pinions; a sun gear (s1) which, by being slid, selectively meshes with the first pinion or the second pinion; a brake (4) for locking the sun gear when the sun gear and the first pinion mesh (the low position of the transfer); a driving gear (6) which meshes with the sun gear when the sun gear and the second pinion mesh (the high position of the transfer); a sleeve (5) mounted on the first output shaft and shifted for engaging the driving gear with the first output shaft in the direction of rotation; a second output shaft (9) disposed in parallel with the first output shaft; and a driven gear (7) which co-rotates with the second output shaft and to which torque is transmitted from the driving gear via a chain (8).