GB2054767A - A radial-axial rolling bearing assembly - Google Patents
A radial-axial rolling bearing assembly Download PDFInfo
- Publication number
- GB2054767A GB2054767A GB8013953A GB8013953A GB2054767A GB 2054767 A GB2054767 A GB 2054767A GB 8013953 A GB8013953 A GB 8013953A GB 8013953 A GB8013953 A GB 8013953A GB 2054767 A GB2054767 A GB 2054767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- race
- rollers
- radial
- bearing assembly
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title description 6
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract 3
- 230000001050 lubricating effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 11
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010724 circulating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/381—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with at least one row for radial load in combination with at least one row for axial load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/545—Systems comprising at least one rolling bearing for radial load in combination with at least one rolling bearing for axial load
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A radial-axial roller bearing assembly suitable especially for mounting a machine tool spindle 5, 6 formed with a helical ball track is of the kind having a set of radial load- supporting rollers 3 between radially outer and inner races 2 and 4 and two sets of axial load-supporting rollers 7 between race rings 8, 9 and corresponding ends of the outer race 2. In order to seal such a bearing assembly against leakage of lubricant therefrom, there is secured to one end of the outer race 2, in axial alignment with the latter, a carrier ring 13 which extends axially over the race ring 9 and carries a sealing ring 17 slidably engaging the outer circumference of the said race ring 9. <IMAGE>
Description
SPECIFICATION
A radial-axial rolling bearing assembly
This invention relates to a radial-axial rolling bearing assembly, particularly, but not exclusively, for mounting a ball screw in a machine tool, the said rolling bearing assembly being of the kind comprising an annular arrangement of radial loadsupporting cylindrical rollers; two annular arrangements of axial load-supporting cylindrical rollers; a radially outer race having, on its radially inner circumference, a radially outer race track for the radial load-supporting rollers and, on its two axially outer ends, axially inner race tracks for the axial load-supporting rollers of the two annular arrangements respectively of such rollers; a radially inner race having, on its radially outer circumference, a radially inner race tracks for the radial load-supporting rollers; and two race rings lying against the two axially outer ends respectively of the radially inner race and having, on their mutually confronting sides, axially outer race tracks for the axial load-supporting rollers of the two annular arrangements respectively of such rollers.
Sealing such bearing assemblies frequently represents a special problem when installing radial-axial rolling bearing assemblies of this kind.
Often, such bearings are provided with recirculating oil lubrication, in which case particular sealing problems occur because of the relatively large amounts of oil involved. Hitherto, the user of bearing assemblies of this kind was obliged to take special steps to provide a satisfactory sealing means. For this purpose, he generally had to provide suitable seating surfaces for a seal on the housing which carried the bearing assembly and in addition had to mount on the shaft separate members with which the sealing means could co-operate. The manufacturing cost of, and not least the amount of space required by, such sealing means was considerabie and was unacceptable in many cases.
It is accordingly an object of the present invention to provide a bearing assembly of the kind jnitially referred to, using very simple structural means, with a seal which is connected to the bearing assembly to form a structural unit therewith and which therefore will, in practice, be supplied together with the bearing.
With this object in view, the present invention provides a bearing assembly of the kind referred to in which a carrier ring is secured to one of the axially outer end faces of the outer race so that it is axially aligned with the latter, the said carrier ring extending axially over the race ring which is located at the corresponding end of the bearing assembly and carrying a sealing ring which is in sliding engagement with the outer circumference of the iast-mentioned race ring.
With such an arrangement it is only necessary to provide, apart from the sealing ring itself, a single additional component, namely the carrier ring which carries the sealing ring. The carrier ring can be a simple component symmetrical about its axis of rotation, and, in order to provide for centering thereof on the outer race, it is only necessary to provide coaxial cylindrical interengaging surfaces on the carrier ring and on the outer race. In relation to the extremely accurate machining of the outer race of the bearing assembly, which is required in any case, the provision of a precise centering surface of this kind represents only a slight increase in cost.
Because the sealing ring slidably engages against the outer circumference of one of the race rings, it is not necessary to provide a separate component therefor. The race ring at the corresponding end of the assembly which is required in any case is used, on the contrary, to perform the second function of co-operating with the seal.
A bearing assembly embodying the invention is shown in longitudinal section in the accompanying drawing.
Disposed in a bore in a housing 1 is the outer race 2 of a radial-axial rolling bearing assembly.
Cylindrical rollers 3 are arranged to roll in the bore of the outer race 2, the inner track for the rollers 3 being formed by an inner race 4 which is carried on a cylindrical journal portion 5 of a ball screw 6.
Two rings 7 of rollers are arranged to roll against the two end faces respectively of the outer race 2, the second tracks for these rings 7 of rollers being formed on race rings 8 and 9. The race ring 8 which is shown on the right in the drawing bears by way of a spacer ring 10 against a shoulder of the spindle 6. A clamping nut 11 which co-operates with a screw-threaded portion 12 of the spindle bears against the race ring 9 which is shown on the left in the drawing. By rotating the nut 1 , the assembly of components comprising the spacer ring 10, the two race rings 8 and 9 and the inner race 4 can be firmly clamped between the nut 11 and the shoulder on the spindle 6.
A carrier ring 1 3 is fitted against the left-hand end face of the outer race 2 and is secured in position by screws 14. A sealing ring 1 5 is provided between the outer race 2 and the carrier ring 13. In order to ensure that the carrier ring 1 3 will occupy a precisely concentric position with respect to the outer race 2, it is supported on a centering shoulder 1 6 on the outer race 2.
A seal 17, which is fitted into the carrier ring 13, slidably engages the outside surface of the race ring 9.
In the embodiment illustrated, the outer race 2, and thus the entire bearing unit, is fixedly connected to the housing 1 by a plurality of circumferentially distributed screws 18, only one of which is visible in the drawing.
In the embodiment illustrated, the bearing assembly is lubricated by circulating oil. For this purpose an oil feed bore 1 9 and an oil discharge bore 20 are provided in the housing 1. The bores 19 and 20 are connected to an oil circuit (not shown). The oil feed bore 1 9 opens into an axial bore 21 in the outer race 2, which is crossed by a radial bore 22. The two bores 21 and 22 are closed at their outer ends by inserted plugs 23.
The oil supplied to the bearing passes through the radial bore 22 to reach the cylindrical rollers 3 which carry the radial load, and from there is conveyed outwardly by centrifugal force to the annular arrangements 7 of rollers which carry the axial load. From there the oil is passed by way of an axial bore 24 in the outer race 2 to the oil discharge bore 20. For this purpose, the latter has a transverse bore 25 which opens into the region of the second ring 7 of rollers. The carrier ring 13 has a plurality of oil inlet and oil outlet openings 26 distributed circumferentially thereof.
Claims (3)
1. A radial-axial bearing assembly of the kind
comprising an annular arrangement of radial loadsupporting cyclindrical rollers; two annular arrangements of axial load-supporting cyclindrical rollers; a radially outer race having, on its radially
inner circumference, a radially outer race track for the radial load-supporting rollers and, on its two axially outer ends, axially inner race tracks for the axial load-supporting rollers of the two rings respectively of such rollers; a radially inner race having, on its radially outer circumference, a radially inner race track for the radial loadsupporting rollers; and two race rings lying against the two axially outer ends respectively of the radially inner race and having, on their muturally confronting sides, axially outer race tracks for the axial load-supporting rollers of the two rings respectively of such rollers, characterised in that a carrier ring is secured to one of the axially outer end faces of the outer race so that it is axially aligned with the latter, the said carrier ring extending axially over the race ring which is located at the corresponding end of the bearing assembly and carrying a sealing ring which is in sliding engagement with the outer circumference of the last-mentioned race ring.
2. A radial-axial bearing assembly according to claim 1, characterised in that the outer race is formed with a plurality of circumferentially distributed axial bores for the admission and/or discharge of a lubricant for lubricating the rollers and the carrier ring is formed, in the region thereof adjacent said axial bores, with openings for the passage of the lubricant.
3. A radial-axial bearing assembly substantially as described with reference to and as shown in the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19792917425 DE2917425A1 (en) | 1979-04-28 | 1979-04-28 | RADIAL-AXIAL ROLLER BEARING, ESPECIALLY FOR THE BEARING OF BALL ROLLER SPINDLES IN MACHINE TOOLS |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2054767A true GB2054767A (en) | 1981-02-18 |
GB2054767B GB2054767B (en) | 1983-02-23 |
Family
ID=6069592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8013953A Expired GB2054767B (en) | 1979-04-28 | 1980-04-28 | Radial-axial rolling bearing assembly |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2917425A1 (en) |
FR (1) | FR2455208A1 (en) |
GB (1) | GB2054767B (en) |
IT (1) | IT1129625B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4770601A (en) * | 1982-01-07 | 1988-09-13 | Crisafulli Pump Company, Inc. | Pump shaft bearing protection system |
US20130279836A1 (en) * | 2012-04-20 | 2013-10-24 | GM Global Technology Operations LLC | Transmission wheel arrangement |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4320929A (en) * | 1980-08-20 | 1982-03-23 | Oncor Corporation | Sealed bearing system for hydraulically operated devices |
FR2531507A1 (en) * | 1982-08-06 | 1984-02-10 | Nadella | Sealing device, especially for a combined roller bearing. |
DE3711385C2 (en) * | 1987-04-04 | 1995-10-05 | Stromag Maschf | Device for the radial supply of a lubricant-containing liquid to a rotatable sleeve |
DE3811129A1 (en) * | 1988-03-31 | 1989-10-19 | Fortuna Werke Maschf Ag | Bearing for a spindle of a machine tool |
DE4115217C2 (en) * | 1991-05-10 | 1993-10-21 | Deere & Co | Storage unit |
DE4232563B4 (en) * | 1992-09-29 | 2005-09-29 | Ina-Schaeffler Kg | Rolling bearing for mounting a machine tool spindle |
DE19942984A1 (en) | 1999-09-09 | 2001-03-15 | Schaeffler Waelzlager Ohg | Radial-axial bearing unit |
DE102008038425A1 (en) * | 2008-08-19 | 2010-02-25 | Ab Skf | Bearing arrangement, particularly printing machine arrangement for mounting journal of impression cylinder of printing machine, has double-row radial bearing with two rows of cylindrical rolling body |
DE102010000809B4 (en) * | 2009-07-13 | 2014-10-30 | manroland sheetfed GmbH | Compact axial-radial bearing |
CN112049800A (en) * | 2020-07-25 | 2020-12-08 | 三联泵业股份有限公司 | Horizontal double entry pump in energy-saving double containment level is multistage |
-
1979
- 1979-04-28 DE DE19792917425 patent/DE2917425A1/en not_active Ceased
-
1980
- 1980-03-12 IT IT20522/80A patent/IT1129625B/en active
- 1980-04-03 FR FR8007560A patent/FR2455208A1/en active Granted
- 1980-04-28 GB GB8013953A patent/GB2054767B/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4770601A (en) * | 1982-01-07 | 1988-09-13 | Crisafulli Pump Company, Inc. | Pump shaft bearing protection system |
US20130279836A1 (en) * | 2012-04-20 | 2013-10-24 | GM Global Technology Operations LLC | Transmission wheel arrangement |
US8845198B2 (en) * | 2012-04-20 | 2014-09-30 | GM Global Technology Operations LLC | Transmission wheel arrangement |
Also Published As
Publication number | Publication date |
---|---|
IT8020522A0 (en) | 1980-03-12 |
DE2917425A1 (en) | 1980-11-06 |
GB2054767B (en) | 1983-02-23 |
FR2455208A1 (en) | 1980-11-21 |
FR2455208B1 (en) | 1983-11-18 |
IT1129625B (en) | 1986-06-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE20 | Patent expired after termination of 20 years |
Effective date: 20000427 |