US3782795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered roller bearing
Assignee: Timken Co
•
Filing: 1972-04-06
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Granted: 1974-01-01
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Expires: 1992-04-06
Abstract
Abstract A tapered roller bearing has a pin-type cage for maintaining the proper circumferential spacing between the tapered rollers and in the spaces between the rollers it has cage inserts formed from a composite material containing a dry lubricant. In addition, the cone of the bearing has an insert on the thrust rib thereof, and that insert is likewise formed from a composite material containing a dry lubricant. Should the bearings normal supply of lubricant be depleted, the composite material will give up its dry lubricant and for a limited period of time will provide adequate lubrication for critical bearing surfaces. The cone further has outwardly directed oil holes leading to the juncture of the cone raceway and the adjoining abutment face of the thrust rib, and those holes direct lubricating oil to the abutment face as the cone rotates, particularly during high speed operation when the centrifugal force is large.
Inventors
- 👤 J Richey
- 👤 R Mckelvey
- 👤 R Cornish
- 👤 H Noll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:02
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/46; F16C33/56; F16C19/00; F16C19/22; F16C19/34; F16C19/36; F16C19/364; F16C33/4617; F16C33/4664; F16C33/52; F16C33/523; F16C33/526; F16C33/66; F16C33/6637; F16C33/6659; F16C33/6677; F16C33/6696
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
286 words
A tapered roller bearing comprising a cup having an inwardly presented tapered raceway, a cone located generally within the cup and having an outwardly presented tapered raceway, and a thrust rib at the large diameter end of the cone raceway, the thrust rib projecting outwardly beyond the large diameter end of the cone raceway and having an abutment face presented adjacent to that raceway; tapered rollers interposed between the cup and the cone with each roller being provided with an axially extending bore, the rollers further having tapered side faces engaged with the tapered raceways and end faces engaged with the abutment face, whereby the abutment face axially positions the rollers, the cup, cone and rollers being in metal-to-metal contact along the raceways; a cage for maintaining the proper spacing between adjacent rollers and including rings positioned beyond the ends of the rollers and pins fastened to and interconnecting the rings, the pins extending through the axial bores of the rollers so as to restrict circumferential movement of the rollers relative to each other; and inserts between the side faces of adjacent rollers and having side faces contoured to conform to the side faces of the rollers, the inserts being loosely fitted between the rollers and movable relative to each other and also movable relative to the cage, the inserts being radially confined by the rollers, whereby the inserts are capable of contacting the side faces at the rollers along their contoured side faces, the inserts at least at their contoured side faces being formed from a composite material containing a dry lubricant so that when the bearing loses its normal supply of lubricant, the composite material will release its lubricant to keep the bearing lubricated.
Claim 2
Dependent Claim
286 words
A tapered roller bearing comprising a cup having an inwardly presented tapered raceway, a cone located generally within the cup and having an outwardly presented tapered raceway, and a thrust rib at the large diameter end of the cone raceway, the thrust rib projecting outwardly beyond the large diameter end of the cone raceway and having an abutment face presented adjacent to that raceway; tapered rollers interposed between the cup and the cone with each roller being provided with an axially extending bore, the rollers further having tapered side faces engaged with the tapered raceways and end faces engaged with the abutment face, whereby the abutment face axially positions the rollers, the cup, cone and rollers being in metal-to-metal contact along the raceways; a cage for maintaining the proper spacing between adjacent rollers and including rings positioned beyond the ends of the rollers and pins fastened to and interconnecting the rings, the pins extending through the axial bores of the rollers so as to restrict circumferential movement of the rollers relative to each other; and inserts between the side faces of adjacent rollers and having side faces contoured to conform to the side faces of the rollers, the inserts being loosely fitted between the rollers and movable relative to each other and also movable relative to the cage, the inserts being radially confined by the rollers, whereby the inserts are capable of contacting the side faces at the rollers along their contoured side faces, the inserts at least at their contoured side faces being formed from a composite material containing a dry lubricant so that when the bearing loses its normal supply of lubricant, the composite material will release its lubricant to keep the bearing lubricated.
Claim 3
Dependent Claim
22 words
A tapered roller bearing according to claim 1 wherein the inserts are relieved opposite to the abutment face of the thrust rib.
Claim 4
Dependent Claim
18 words
A tapered roller bearing according to claim 1 wherein the inserts are molded entirely from the composite material.
Claim 5
Dependent Claim
16 words
A tapered roller bearing according to claim 1 wherein the inserts are spaced from both raceways.
Claim 6
Dependent Claim
72 words
A tapered roller bearing according to claim 1 wherein the thrust rib has a rib insert formed from a composite material containing a dry lubricant, and the abutment face is at least in part on the composite material, whereby when the bearing loses its normal supply of lubricant the composite material will give up its dry lubricant and prevent excessive friction from developing between the abutment face and the roller end faces.
Claim 7
Dependent Claim
59 words
A tapered roller bearing according to claim 5 wherein the cone has at least one oil hole therein extending generally outwardly away from the axes of rotation and terminating in the vicinity of the abutment face where it opens outwardly of the cone, whereby when the cone rotates, oil will be conveyed by centrifugaL force to the abutment face.
Claim 8
Dependent Claim
59 words
A tapered roller bearing according to claim 1 wherein the cone has at least one oil hole therein extending generally outwardly away from the axis of rotation and terminating in the vicinity of the abutment face where it opens outwardly of the cone, whereby when the cone rotates, oil will be conveyed by centrifugal force to the abutment face.
Claim 9
Dependent Claim
22 words
A tapered roller bearing according to claim 1 wherein the abutment face of the thrust rib is hardened by a boronizing process.
Claim 10
Dependent Claim
27 words
A tapered roller bearing according to claim 1 wherein the thrust rib carries a low friction alloy, and the abutment surface is on the low friction alloy.
Claim 11
Dependent Claim
29 words
A tapered roller bearing according to claim 1 wherein the inserts are detached from the cage and are confined in the axial direction by the rings of the cage.
Claim 12
Dependent Claim
200 words
A tapered roller bearing comprising a cup having an inwardly presented tapered raceway, tapered rollers having tapered side faces engaged with the cup raceway, the rollers also having end faces at their large diameter ends, a cone located generally within the cup and having an outwardly presented tapered raceway located opposite to the cup raceway and engaged with the side faces of the rollers; the cone having a thrust rib projecting outwardly beyond the large diameter end of the cone raceway and provided with an abutment face against which the end faces of the rollers bear, the thrust rib further having an insert formed from a composite material containing a dry lubricant and the abutment face being at least in part on the insert so that when the normal supply of lubricant for the bearing is depleted the composite material will give up its dry lubricant and prevent excessive friction from developing between the roller end faces and the abutment face, the cone further having at least one oil hole extending generally outwardly therein and terminating in the vicinity of the abutment face so that oil may be conveyed by centrifugal force to the abutment face as the cone rotates.
Claim 13
Dependent Claim
200 words
A tapered roller bearing comprising a cup having an inwardly presented tapered raceway, tapered rollers having tapered side faces engaged with the cup raceway, the rollers also having end faces at their large diameter ends, a cone located generally within the cup and having an outwardly presented tapered raceway located opposite to the cup raceway and engaged with the side faces of the rollers; the cone having a thrust rib projecting outwardly beyond the large diameter end of the cone raceway and provided with an abutment face against which the end faces of the rollers bear, the thrust rib further having an insert formed from a composite material containing a dry lubricant and the abutment face being at least in part on the insert so that when the normal supply of lubricant for the bearing is depleted the composite material will give up its dry lubricant and prevent excessive friction from developing between the roller end faces and the abutment face, the cone further having at least one oil hole extending generally outwardly therein and terminating in the vicinity of the abutment face so that oil may be conveyed by centrifugal force to the abutment face as the cone rotates.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |