| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-wheel and four-wheel drive switching device for a vehicle of simple structure, and reducing the noise, capable of being assembled with a minimum change of an existing constitution. SOLUTION: This device has a switching unit 31 for connecting and disconnecting the power transmission in a power transmitting mechanism, and the switching unit is composed of a driving shaft 32 connected to a driving side, a driven shaft 33 fitted to the driving shaft with an annular clearance, plural engagement and disengagement members 34 mounted on the clearance between the driving shaft and the driven shaft to be engaged with and disengaged from opposite faces of these shafts for connecting and disconnecting the driving shaft and the driven shaft, a switching mechanism 35 for selectively positioning these engagement and disengagement members between a position for connecting the driving shaft and the driven shaft and a position for separating them, and a casing 36 surrounding these members.
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