| 摘要 |
PURPOSE:To simplify the supporting structure of a herical gear shaft by reversing thrust force to be generated on the herical gear of an accelerating/ decelerating mechanism in relation to the pressing direction of a coupling. CONSTITUTION:In an accelerating/decelerating mechanism 6, when a coupling 7 is put into the engagement by control of a controller, driving force is transmitted from an intermediate shaft 14 side to be rotated at high speed to the right wheel side driving shaft 3 side. While, when a coupling 8 is put into the engagement, driving force is moved from the right wheel side driving shaft 3 side to a left wheel side driving shaft 2, thereby the driving of the right wheel becomes larger than that of the left wheel, When the couplings 7, 8 are put into the engagement, both hydraulic pressing force and thrust force to be generated on respective gears act in the axial direction and are applied to bearings 10, etc. Therefore, gears 13A to 15A and respective counter gears 18A to 18C are made herical gears, and the torsional direction of the tooth traces of respective gears are specified, so as to offset thrust force to be generated in the rotation. Accordingly, load to the bearings 10 is increased, so as to enable a device to be miniaturized and lightened.
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