2WD-4WD switch device null of part-time type four wheel drive

摘要

PROBLEM TO BE SOLVED: To provide a two/four-wheel drive switching device for a part time four-wheel vehicle lightening weight, improving controllability, further with a cost reduced. ;SOLUTION: A front wheel propeller shaft 25 driving a front wheel and a rear wheel propeller shaft 10 driving a rear wheel are provided, one propeller shaft, for instance, the rear wheel propeller shaft 10 is interlockingly connected with an output shaft of a transmission always in a connection condition, the front wheel propeller shaft 25, relating to the rear wheel propeller shaft 10, is interlockingly connected able to be interrupted by a clutch use sleeve 36 movable between connection/-disconnection positions. As a means moving the clutch use sleeve 36, a hydraulic actuator 37 utilizing operating oil of an engine, for instance, lubricating oil supplied by a lubricating oil supply pump 63 is provided. The hydraulic actuator 37 is provided in the inside of a crankcase 20.;COPYRIGHT: (C)1999,JPO