TAPERED ROLLER BEARING
First Claim
1. A tapered roller bearing comprising:
- an inner ring that has an outer peripheral surface formed as an inner ring raceway surface in a shape of a tapered shaft;
an outer ring that is concentrically disposed on an outer peripheral side of the inner ring and has an inner peripheral surface formed as an outer ring raceway surface in a shape of a tapered hole;
a plurality of tapered rollers disposed to be rollable in an annular space between the inner ring raceway surface and the outer ring raceway surface; and
a cage having a plurality of pockets that hold the respective tapered rollers, wherein the cage includes;
a large-diameter side annular portion and a small-diameter side annular portion that are disposed in an axial direction with a predetermined space therebetween and form wall portions in both axial ends of the pockets; and
a plurality of cage bars each extending between the large-diameter side annular portion and the small-diameter side annular portion to connect both end portions of the cage bar and the annular portions , and forming wall portions on both circumferential sides of the pockets, anda pressure difference reducing portion is provided which reduces the difference between a pressure in an inner region including a smallest bore diameter portion of the outer ring raceway surface and a pressure in an outer region including a boundary portion between an outer peripheral surface and an axially outer end surface of the small-diameter side annular portion of the cage.
1 Assignment
0 Petitions
Accused Products
Abstract
A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and a cage. The cage includes: a large-diameter side annular portion and a small-diameter side annular portion that form wall portions in both axial ends of pockets; and a plurality of cage bars. A pressure difference reducing portion is provided which reduces the difference between a pressure in an inner region including a smallest bore diameter portion of an outer ring raceway surface of the outer ring and a pressure in an outer region including a boundary portion between an outer peripheral surface and an axially outer end surface of the small-diameter side annular portion of the cage.
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Citations
8 Claims
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1. A tapered roller bearing comprising:
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an inner ring that has an outer peripheral surface formed as an inner ring raceway surface in a shape of a tapered shaft; an outer ring that is concentrically disposed on an outer peripheral side of the inner ring and has an inner peripheral surface formed as an outer ring raceway surface in a shape of a tapered hole; a plurality of tapered rollers disposed to be rollable in an annular space between the inner ring raceway surface and the outer ring raceway surface; and a cage having a plurality of pockets that hold the respective tapered rollers, wherein the cage includes;
a large-diameter side annular portion and a small-diameter side annular portion that are disposed in an axial direction with a predetermined space therebetween and form wall portions in both axial ends of the pockets; and
a plurality of cage bars each extending between the large-diameter side annular portion and the small-diameter side annular portion to connect both end portions of the cage bar and the annular portions , and forming wall portions on both circumferential sides of the pockets, anda pressure difference reducing portion is provided which reduces the difference between a pressure in an inner region including a smallest bore diameter portion of the outer ring raceway surface and a pressure in an outer region including a boundary portion between an outer peripheral surface and an axially outer end surface of the small-diameter side annular portion of the cage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification