| 摘要 |
PURPOSE:To facilitate the change-over of 2W running, differential 4W running and direct 4W running, by constituting a change-over controller, controlling the actuation of a central differential gear being interposed between axles of both front and rear wheels, in a way of installing a movable connecting member to be moved to three different positions by hydraulic force. CONSTITUTION:A central differential gear 10 receiving engine power via an output gear 9 is installed interposingly between axles 16 and 12 of both front and rear wheels, and it actuation is controlled by a change-over controller having an outer wall housing 19. Both multistage pistonlike first and second movable members 20 and 24 are set up in a closed chamber to be partitioned off between this housing 19 and a casing 14 of the central differential gear 10 shiftably in the axial direction, and a movable connecting member 18 is interlocked with these members aforesaid via a pair of elastic members 21 and 22 oppositely set up to the inner circumferential side of the fist movable member 20. And, engagement between dog clutches 15, 17 and a hub clutch 13 is controlled by hydraulic drive of these movable members 20 and 24 via the movable connecting member 18.
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