VEHICULAR TWO-WHEEL/FOUR-WHEEL DRIVE SWITCHING SYSTEM

摘要

To provide a vehicular two-wheel drive and four-wheel drive switching system the configuration of which is simple, which can be builtwithoutchangingtheexistingconfigurationpossibly,whichhardly generates noise and which can be individually lubricated in a state separated from the other actuating part. [Means to Solve] A vehicular two-wheel drive and four-wheel drive switching system is provided with a switching unit 31 for transmitting power or disconnecting the transmission of power in a power transmission mechanism, the switching unit is composed of a driving shaft 32 connected to the drive side, a driven shaft 33 fitted to the driving shaft via a circular clearance gap, plural connecting/disconnecting members 34 provided in clearance between the driving shaft and the driven shaft for connecting or disconnecting the driving shaft and the driven shaft by being fitted or disconnected to/from respective opposite surfaces, a switching mechanism 35 for selectively positioning these connecting/disconnecting members in a position in which the driving shaft and the driven shaft are connected and in a position in which they are disconnected and a casing 36 surrounding these, and an oil seal is provided in two locations at an interval in the longitudinal direction of the driven shaft so that the switching mechanism is sealed. 19