Abstract: A differential gear device for a vehicle capable of improving durability without causing vibration and noise is provided. At least a part of a supporting portion 68 of a pinion shaft 56 that supports a pinion gear 60 and at least a part of a fitting hole 66 of the pinion gear 60 into which the pinion shaft 56 is inserted respectively have tapered surfaces 70 and 72 each having a diameter decreasing toward an outer circumference of the supporting portion or the pinion gear. Driving force is transmitted from a differential case 50 to side gears 58l and 58r through the pinion shaft 56 and the pinion gear 60 rotatably supported. Here, the pinion gear 60 is moved outward in the axial direction of the pinion shaft 56 according to the engagement reaction force between the pinion gear 60 and the side gears 58l and 58r.

Abstract: A bearing lubricating structure for a rotating shaft includes: a pair of bearings that are disposed spaced-apart in an axial direction within a support case, for rotatably supporting the predetermined rotating shaft around an axis thereof; and an oil supply port that is disposed on the support case, for supplying lubricating oil for lubricating the pair of bearings to between the pair of bearings, between the pair of bearings and between the oil supply port and the rotating shaft, a separator being disposed in the axial direction, for receiving the lubricating oil supplied from the oil supply port to prevent the lubricating oil from directly adhering to the rotating shaft, the separator being integrally fixed to the support case, and the separator having at its axially opposite ends thereof a pair of sidewalls confronting the pair of bearings and projecting from the opposite ends toward an inner circumferential surface of the support case to be in intimate contact with the inner circumferential surface, and t

Abstract: A bearing lubricating structure for a rotating shaft includes: a pair of bearings that are disposed spaced-apart in an axial direction within a support case, for rotatably supporting the predetermined rotating shaft around an axis thereof; and an oil supply port that is disposed on the support case, for supplying lubricating oil for lubricating the pair of bearings to between the pair of bearings, between the pair of bearings and between the oil supply port and the rotating shaft, a separator being disposed in the axial direction, for receiving the lubricating oil supplied from the oil supply port to prevent the lubricating oil from directly adhering to the rotating shaft, the separator being integrally fixed to the support case, and the separator having at its axially opposite ends thereof a pair of sidewalls confronting the pair of bearings and projecting from the opposite ends toward an inner circumferential surface of the support case to be in intimate contact with the inner circumferential surface, and t

Abstract: A differential gear device for a vehicle capable of improving durability without causing vibration and noise is provided. At least a part of a supporting portion 68 of a pinion shaft 56 that supports a pinion gear 60 and at least a part of a fitting hole 66 of the pinion gear 60 into which the pinion shaft 56 is inserted respectively have tapered surfaces 70 and 72 each having a diameter decreasing toward an outer circumference of the supporting portion or the pinion gear. Driving force is transmitted from a differential case 50 to side gears 58l and 58r through the pinion shaft 56 and the pinion gear 60 rotatably supported. Here, the pinion gear 60 is moved outward in the axial direction of the pinion shaft 56 according to the engagement reaction force between the pinion gear 60 and the side gears 58l and 58r.