Two-wheel and four-wheel driving change-over device for vehicle

A two-wheel and four-wheel driving change-over device for a vehicle having a change-over unit arranged either at a power transmission mechanism installed between an engine and front wheels or at a power transmission mechanism installed between the engine and rear wheels and for providing intermittent power transmission from the power transmission mechanism, comprising:

• a driving shaft connected to a driving side;
• a driven shaft fitted to the driving shaft with a clearance disposed therebetween;
• a plurality of engaging or disengaging members, installed in the clearance between the driving shaft and driven shaft, engage with or disengage from opposing surfaces to perform a connecting operation and a disconnecting operation between the driving shaft and driven shaft;
• a change-over mechanism for selectively positioning the engaging or disengaging members between a position where said driving shaft and driven shaft are connected and a position where said driving shaft and driven shaft are disconnected;
• a casing enclosing the change-over mechanism, one end of the casing extending into a final gear reducing unit,
• wherein the one end of the casing extending into the final gear reducing unit includes a first bearing for rotatably supporting the driven gear, the first bearing being positioned adjacent to a bevel gear arranged at an extreme end of the driven gear.