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US 7,934,871 B2Granted
Double row ball bearing
AssigneeJtekt Corporation
InventorsToshihiro Kawaguchi, Toshirou Fukuda, Yuzuru Takahashi
Life of this patent
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Abstract
The large diameter cage has an asymmetric shape, a diameter (discharge diameter) of which close to an opening is larger than a diameter (inflow diameter) close to the small diameter cage, and the small diameter cage has a symmetric shape, in which a diameter (inflow diameter) of which close to an opening is equal to a diameter (discharge diameter) close to the large diameter cage.
Claims13
A double row ball bearing comprising:
- an outer ring that includes double row raceway surfaces different in diameter from each other;
- an inner ring that includes double row raceway surfaces corresponding to the raceway surfaces of the outer ring, respectively;
- a plurality of large diameter balls and a plurality of small diameter balls that are disposed between the raceway surfaces of the rows of the inner and outer rings with different pitch diameters, respectively;
- a large diameter cage that retains the plurality of large diameter balls;
- and
- a small diameter cage that retains the plurality of small diameter balls,
- wherein the large diameter cage comprises an asymmetric shape with respect to a center in an axial direction, a diameter of the large diameter cage close to an end section opening is greater than a diameter close to the small diameter cage,
- wherein the small diameter cage comprises a symmetric shape with respect to a center in an axial direction, a diameter of the small diameter cage close to an end section opening is substantially equal to a diameter close to the large diameter cage, and
- wherein the plurality of large diameter balls and the plurality of small diameter balls are disposed between the raceway surfaces of the rows of the inner and outer rings such that each of ball bearings constituted by the large diameter balls and the small diameter balls forms an angular ball bearing.
6 more elements
A double row ball bearing comprising:
- an outer ring;
- an inner ring;
- a plurality of balls disposed in double rows between the inner and outer rings;
- and
- cages that retain the balls, in which lubricant is moved by a pumping action of the bearing,
- wherein the outer ring is provided with a lubricant discharging passage for discharging the lubricant between the double rows of balls to outside the double rows of balls, and
- wherein the balls are disposed between raceway surfaces of the double rows between the inner and outer rings such that each of ball bearings constituted by the balls forms an angular ball bearing.
4 more elements
A double row ball bearing comprising:
- an outer ring;
- an inner ring;
- a plurality of balls disposed in double rows between the inner and outer rings;
- and
- cages that retain the balls, in which lubricant is moved by a pumping action of the bearing,
- wherein the lubricant is discharged from a discharge end section of the pumping action, the lubricant is prevented from flowing in from an inflow end section of the pumping action, and the outer ring is provided with a lubricant supplying passage for dripping the lubricant to balls of the plurality of balls disposed on the inflow side of the pumping action, and
- wherein the balls are disposed between raceway surfaces of the double rows between the inner and outer rings such that each of ball bearings constituted by the balls forms an angular ball bearing.
4 more elements
Dependencies are inferred from the claim text.