A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller,
A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring when the cage segment starts rotating.
대표청구항▼
1. A split cage comprising a plurality of cage segments, each of the cage segments having a pair of rim portions that face each other at a prescribed distance in an axial direction of the split cage, and a pair of cage bar portions disposed between the rim portions to connect the rim portions to eac
1. A split cage comprising a plurality of cage segments, each of the cage segments having a pair of rim portions that face each other at a prescribed distance in an axial direction of the split cage, and a pair of cage bar portions disposed between the rim portions to connect the rim portions to each other, the cage bar portions and the rim portions defining a single pocket that accommodates a single roller, wherein: the cage segments are arranged in a circular pattern along a circumferential direction of the split cage, in an annular space between an inner ring and an outer ring;a circumferential clearance is provided between adjacent cage segments, and radial clearances are formed between each of the cage segments and the inner ring and the outer ring to allow a rotation of each of the cage segments, the rotation of each of the cage segments being guided by the roller;each of the cage segments has projections formed so as to project toward at least one of a radially outside and a radially inside, the projections being formed at both the rim portions and the cage bar portions, or at the rim portions or the cage bar portions; anda projecting length of each of the projections is set to such a length that the projections are brought into contact with an outer peripheral side portion of the inner ring or an inner peripheral side portion of the outer ring, toward which the projections project, when the cage segment rotates by predetermined degrees. 2. The split cage according to claim 1, wherein each of the projections has such a shape as to be brought into line contact with a contact face toward which the projection projects. 3. A roller bearing comprising: an inner ring;an outer ring;a plurality of rollers rollably disposed in an annular space between the inner ring and the outer ring; andthe split cage according to claim 1. 4. The roller bearing according to claim 3, wherein: each of the rollers is a tapered roller;the inner ring has an inner ring raceway surface that is a tapered face on which the tapered rollers roll, and an annular large rib portion that is disposed at a large-diameter-side axial end portion of the inner ring and that projects radially outward; andan outer peripheral face of the large rib portion has a cylindrical face having a center line that coincides with an axis of the inner ring, and a tapered face with which the projection is allowed to be brought into contact. 5. The split cage according to claim 1, wherein: a pocket-side side face of each of the cage bar portions is a pocket-side face that is allowed to be in sliding contact with an outer peripheral face of the roller; andthe pocket-side face of each of the cage bar portions has an inner tilted face that is formed so as to be tilted such that part of the inner tilted face except a radially inner end of the pocket-side face is allowed to be in contact with the outer peripheral face of the roller, and an outer tilted face that is formed at a position radially outward of the inner tilted face so as to be tilted such that part of the outer tilted face except a radially outer end of the pocket-side face is allowed to be in contact with the outer peripheral face of the roller. 6. The split cage according to claim 5, wherein: the number of the projections is at least two, the at least two projections being disposed apart from each other in the axial direction to be brought into contact with contact faces of the outer peripheral side portion of the inner ring or the inner peripheral side portion of the outer ring, the contact faces being at least on both sides in the axial direction; andlengths of the two projections are set such that both of the two projections are brought into contact with the contact faces when the cage segment rotates. 7. The split cage according to claim 6, wherein each of the projections has such a shape as to be brought into line contact with a contact face toward which the projection projects. 8. A roller bearing comprising: an inner ring;an outer ring;a plurality of rollers rollably disposed in an annular space between the inner ring and the outer ring; andthe split cage according to claim 6. 9. The split cage according to claim 5, wherein each of the projections has such a shape as to be brought into line contact with a contact face toward which the projection projects. 10. A roller bearing comprising: an inner ring;an outer ring;a plurality of rollers rollably disposed in an annular space between the inner ring and the outer ring; andthe split cage according to claim 5. 11. The roller bearing according to claim 10, wherein: each of the rollers is a tapered roller;the inner ring has an inner ring raceway surface that is a tapered face on which the tapered rollers roll, and an annular large rib portion that is disposed at a large-diameter-side axial end portion of the inner ring and that projects radially outward; andan outer peripheral face of the large rib portion has a cylindrical face having a center line that coincides with an axis of the inner ring, and a tapered face with which the projection is allowed to be brought into contact. 12. The split cage according to claim 1, wherein: a pocket-side side face of each of the cage bar portions is a pocket-side face that is allowed to be in sliding contact with an outer peripheral face of the roller;the pocket-side face has tilted faces, one of the tilted faces being positioned radially outward of the other one of the tilted faces, the tilted faces being allowed to be in contact with the outer peripheral face of the roller; andin a state where an axis of the roller and an axis of the cage segment coincide with each other, a first radial clearance formed between each of the projections and a contact face with which the projection is brought into contact and toward which the projection projects, is larger than a second radial clearance formed between each of the tilted faces and the outer peripheral face of the roller. 13. The split cage according to claim 12, wherein: the number of the projections is at least two, the at least two projections being disposed apart from each other in the axial direction to be brought into contact with contact faces of the outer peripheral side portion of the inner ring or the inner peripheral side portion of the outer ring, the contact faces being at least on both sides in the axial direction; andlengths of the two projections are set such that both of the two projections are brought into contact with the contact faces when the cage segment rotates. 14. The split cage according to claim 12, wherein each of the projections has such a shape as to be brought into line contact with a contact face toward which the projection projects. 15. A roller bearing comprising: an inner ring;an outer ring;a plurality of rollers rollably disposed in an annular space between the inner ring and the outer ring; andthe split cage according to claim 12. 16. The roller bearing according to claim 15, wherein: each of the rollers is a tapered roller;the inner ring has an inner ring raceway surface that is a tapered face on which the tapered rollers roll, and an annular large rib portion that is disposed at a large-diameter-side axial end portion of the inner ring and that projects radially outward; andan outer peripheral face of the large rib portion has a cylindrical face having a center line that coincides with an axis of the inner ring, and a tapered face with which the projection is allowed to be brought into contact. 17. The split cage according to claim 1, wherein: the number of the projections is at least two, the at least two projections being disposed apart from each other in the axial direction to be brought into contact with contact faces of the outer peripheral side portion of the inner ring or the inner peripheral side portion of the outer ring, the contact faces being at least on both sides in the axial direction; andlengths of the two projections are set such that both of the two projections are brought into contact with the contact faces when the cage segment rotates. 18. The split cage according to claim 17, wherein each of the projections has such a shape as to be brought into line contact with a contact face toward which the projection projects. 19. A roller bearing comprising: an inner ring;an outer ring;a plurality of rollers rollably disposed in an annular space between the inner ring and the outer ring; andthe split cage according to claim 17. 20. The roller bearing according to claim 19, wherein: each of the rollers is a tapered roller;the inner ring has an inner ring raceway surface that is a tapered face on which the tapered rollers roll, and an annular large rib portion that is disposed at a large-diameter-side axial end portion of the inner ring and that projects radially outward; andan outer peripheral face of the large rib portion has a cylindrical face having a center line that coincides with an axis of the inner ring, and a tapered face with which the projection is allowed to be brought into contact.
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이 특허에 인용된 특허 (10)
Knappe, Bernhard, Anti-friction bearing with a segmented cage, particularly for large cylindrical roller bearings.
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