WO2008076011A1 - A spherical roller bearing with integrated locking device - Google Patents
A spherical roller bearing with integrated locking device Download PDFInfo
- Publication number
- WO2008076011A1 WO2008076011A1 PCT/SE2006/001454 SE2006001454W WO2008076011A1 WO 2008076011 A1 WO2008076011 A1 WO 2008076011A1 SE 2006001454 W SE2006001454 W SE 2006001454W WO 2008076011 A1 WO2008076011 A1 WO 2008076011A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- sleeve
- annular flange
- locking device
- spherical roller
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race ring
-
- 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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
-
- 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
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
-
- 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
-
- 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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/10—Force connections, e.g. clamping
- F16C2226/16—Force connections, e.g. clamping by wedge action, e.g. by tapered or conical parts
Definitions
- the present invention refers to a spherical roller bearing provided with integrated locking device.
- Rolling bearings are mounted on a rotating or non-rotating shaft either as a locating bearing or as a non-locating bearing for supporting a machine component of arbitrary design, and when such bearings shall be mounted independently if it shall act as a locating bearing or as a non-locating bearing it is evident that it must be possible to arrest the inner race ring in a well defined exact location in a simple and reliable manner.
- the most commonly used components for such arresting of a bearing with a taper bore is an adapter sleeve having an outer envelope surface with a taper corresponding to that of the bearing bore.
- the adapter sleeve which is slotted, is used together with a lock nut and a locking device, making it possible to arrest the bearing ring axially on the shaft.
- the taper required results in a rather large big end thickness of the adapter sleeve, which in turn means that a part of the cross section available for accommodating the bearing is required for the large section of the adapter sleeve, and consequently the assembly space will permit only a limited bearing size.
- Spherical roller bearings or similar self-aligning bearings are typically mounted with an interference fit.
- a thin-walled sleeve has an outer envelope surface with a saw-tooth profile and the bearing bore has a corresponding saw-tooth profile.
- Such arrangements have been used in plummer block housings, where the bearing has been mounted on the shaft together with an annular flange for tightening devices, such as set screws arranged to extend through threaded bores extending in the longitudinal direction of the shaft for being tightened thus that they subject the bearing inner ring and the thin-walled sleeve to a force, thereby increasing the grip between bearing inner ring and sleeve and between sleeve and a shaft, on which the spherical bearing is to be arrested.
- tightening devices such as set screws arranged to extend through threaded bores extending in the longitudinal direction of the shaft for being tightened thus that they subject the bearing inner ring and the thin-walled sleeve to a force, thereby increasing the grip between bearing inner ring and sleeve and between sleeve and a shaft, on which the spherical bearing is to be arrested.
- the plummer block housing is provided with sealing members positioned outside the bearing.
- the purpose of the present invention therefore now is to provide a spherical roller bearing, provided with integrated locking device, with tapering cooperating surfaces provided on one hand in the outer envelope surface of a thin-walled sleeve and on the other hand in the inner envelope surface of the bearing inner ring, which forms a self-contained unit which can be easily and readily mounted and dismounted without being influenced by the drawbacks experienced with earlier solutions such as described hereabove and this is achieved in that the bearing and locking device unit has been given the features defined in the accompanying claims.
- FIG. 1 shows in a side view a bearing with a locking device in accordance with the invention as seen in mounted position
- Fig. 2 is a cross section along line A - A in Fig. 1.
- FIG. 1 shows the bearing 1 and portions of the inner thin- walled sleeve 5, with its slotted portion 5a, and three set screws 7, extending through an annular flange 6.
- Fig. 2 which is seen along line A - A in Fig. 1, it can be seen how the two-row spherical roller bearing 1, forms an integrated unit with the locking device 2, which is formed as a thin-walled slotted sleeve 5 with saw-tooth tapering cooperating 3, 4 surfaces provided on one hand in the outer envelope surface of the thin-walled sleeve 5 and on the other hand in the inner envelope surface of the bearing inner ring Ia.
- the locking device 2 which is formed as a thin-walled slotted sleeve 5 with saw-tooth tapering cooperating 3, 4 surfaces provided on one hand in the outer envelope surface of the thin-walled sleeve 5 and on the other hand in the inner envelope surface of the bearing inner ring Ia.
- An annular flange 6 for tightening devices in form of set screws 7 is arranged for displacing the sleeve 5 and the bearing inner ring Ia relative to each other, thereby increasing the grip between bearing inner ring Ia and sleeve 5 and between sleeve 5 and a (not shown) shaft, on which the spherical bearing is to be arrested.
- the set screws 7 are arranged to extend through threaded bores 8 in said annular flange 6.
- the threaded bores 8 thereby are arranged inclined under an acute angle to the axial extension of the bearing 1, thereby facilitating access to the screw head with a tool.
- a separate loose thrust flange 9 is provided between the bearing inner ring Ia and said annular flange 6, and this separate loose thrust flange 9 has a surface 9a facing the annular flange 6, which is inclined, thus that it is substantially perpendicular to the extension of said inclined bores 8 in the annular flange 6.
- the annular flange 6 is axially non-displaceable relative to the thin-walled sleeve 5, by the fact that the inner thin-walled sleeve 5 at its outer envelope surface has a circumferential groove 10 axially spaced apart from its tapering surfaces, in which groove 10 a circumferential ridge 11 extending inwardly from the inner envelope surface of the annular flange 6 enters.
- the spherical roller bearing 1 is equipped with integrated sealing means 12, whereby the entire unit can be mounted for delivery from the manufacturing factory as a self-contained unit, which is sealed off, provided with a proper volume of lubricating grease, and is ready to be mounted on a shaft simply by loosening the set screws, pushing up the unit on the shaft, and thereupon tightening the screws again, when the bearing has been pushed up to the desired position.
- the unit has three tightening set screws but this is not a critical number, and it is possible to use any number of corresponding fastening and tightening devices.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
A spherical roller bearing (1), provided with integrated locking device (2), with tapering cooperating (3, 4) surfaces provided on one hand in the outer envelope surface of a thin-walled sleeve (5) and on the other hand in the inner envelope surface of the bearing inner ring (1a), an annular flange (6) for tightening devices (7) being arranged for displacing the sleeve (5) and the bearing inner ring (1a) relative to each other, thereby increasing the grip between bearing inner ring (1a) and sleeve (5) and between sleeve (5) and a shaft, on which the spherical bearing is to be arrested, said tightening device being arranged in inclined bores (8) in said annular flange (6), and a separate loose thrust flange (9) being provided between the bearing inner ring (1a) and said annular flange (6), said separate loose thrust flange (9) having a surface (9a) being inclined, thus that it is substantially perpendicular to the extension of said inclined bores (8) in the annular flange (6).
Description
A SPHERICAL ROLLER BEARING WITH INTEGRATED LOCKING DEVICE
The present invention refers to a spherical roller bearing provided with integrated locking device.
Rolling bearings are mounted on a rotating or non-rotating shaft either as a locating bearing or as a non-locating bearing for supporting a machine component of arbitrary design, and when such bearings shall be mounted independently if it shall act as a locating bearing or as a non-locating bearing it is evident that it must be possible to arrest the inner race ring in a well defined exact location in a simple and reliable manner.
The most commonly used components for such arresting of a bearing with a taper bore is an adapter sleeve having an outer envelope surface with a taper corresponding to that of the bearing bore. The adapter sleeve, which is slotted, is used together with a lock nut and a locking device, making it possible to arrest the bearing ring axially on the shaft. However, the taper required results in a rather large big end thickness of the adapter sleeve, which in turn means that a part of the cross section available for accommodating the bearing is required for the large section of the adapter sleeve, and consequently the assembly space will permit only a limited bearing size.
Spherical roller bearings or similar self-aligning bearings are typically mounted with an interference fit. With the above mentioned commonly used method and components it is required quite a high force for tightening the lock nut whereby it is very difficult to give the bearing the desired interference fit and a desired residual clearance, which is a prerequisite for a well functioning bearing.
There are methods developed for measuring the resulting interference fit and residual clearance, but these are complicated and can not be used in a secure manner, particularly with an internally sealed bearing.
In accordance with another solution, a thin-walled sleeve has an outer envelope surface with a saw-tooth profile and the bearing bore has a corresponding saw-tooth profile. When these saw-toothed profiles are axially displaced relative to each other, a very safe and reliable locking of the bearing on the shaft is achieved, whereby the thickness of the thin-walled sleeve is much smaller than that of the common adapter sleeve.
Such arrangements have been used in plummer block housings, where the bearing has been mounted on the shaft together with an annular flange for tightening devices, such as set screws arranged to extend through threaded bores extending in the longitudinal direction of the shaft for being tightened thus that they subject the bearing inner ring and the thin-walled sleeve to a force, thereby increasing the grip between bearing inner ring and sleeve and between sleeve and a shaft, on which the spherical bearing is to be arrested.
The plummer block housing is provided with sealing members positioned outside the bearing.
The position and direction of the threaded through bores in the annular flange, often will make it difficult to tighten or loosen the set screws, as the tool to be used not always can be easily inserted in the screw head groove.
The purpose of the present invention therefore now is to provide a spherical roller bearing, provided with integrated locking device, with tapering cooperating surfaces provided on one hand in the outer envelope surface of a thin-walled sleeve and on the other hand in the inner envelope surface of the bearing inner ring, which forms a self-contained unit which can be easily and readily mounted and dismounted without being influenced by the drawbacks experienced with earlier solutions such as described hereabove and this is achieved in that the bearing and locking device unit has been given the features defined in the accompanying claims.
Hereinafter the invention will be described with reference to a non-limiting embodiment illustrated in the accompanying drawing.
Fig. 1 shows in a side view a bearing with a locking device in accordance with the invention as seen in mounted position, and
Fig. 2 is a cross section along line A - A in Fig. 1.
The side view of Fig. 1 shows the bearing 1 and portions of the inner thin- walled sleeve 5, with its slotted portion 5a, and three set screws 7, extending through an annular flange 6.
From the cross section according to Fig. 2, which is seen along line A - A in Fig. 1, it can be seen how the two-row spherical roller bearing 1, forms an integrated unit with the locking device 2, which is formed as a thin-walled slotted sleeve 5 with saw-tooth tapering cooperating 3, 4 surfaces provided on one hand in the outer envelope surface of the thin-walled sleeve 5 and on the other hand in the inner envelope surface of the bearing inner ring Ia.
An annular flange 6 for tightening devices in form of set screws 7 is arranged for displacing the sleeve 5 and the bearing inner ring Ia relative to each other, thereby increasing the grip between bearing inner ring Ia and sleeve 5 and between sleeve 5 and a (not shown) shaft, on which the spherical bearing is to be arrested.
The set screws 7 are arranged to extend through threaded bores 8 in said annular flange 6. The threaded bores 8 thereby are arranged inclined under an acute angle to the axial extension of the bearing 1, thereby facilitating access to the screw head with a tool.
A separate loose thrust flange 9 is provided between the bearing inner ring Ia and said annular flange 6, and this separate loose thrust flange 9 has a surface 9a facing the annular flange 6, which is inclined, thus that it is substantially perpendicular to the extension of said inclined bores 8 in the annular flange 6.
The annular flange 6 is axially non-displaceable relative to the thin-walled sleeve 5, by the fact that the inner thin-walled sleeve 5 at its outer envelope surface has a circumferential groove 10 axially spaced apart from its tapering
surfaces, in which groove 10 a circumferential ridge 11 extending inwardly from the inner envelope surface of the annular flange 6 enters.
The spherical roller bearing 1 is equipped with integrated sealing means 12, whereby the entire unit can be mounted for delivery from the manufacturing factory as a self-contained unit, which is sealed off, provided with a proper volume of lubricating grease, and is ready to be mounted on a shaft simply by loosening the set screws, pushing up the unit on the shaft, and thereupon tightening the screws again, when the bearing has been pushed up to the desired position.
In the embodiment illustrated the unit has three tightening set screws but this is not a critical number, and it is possible to use any number of corresponding fastening and tightening devices.
The invention is not limited to the embodiment illustrated and described in connection to the drawing, but modifications and variants are possible within the scope of the accompanying claims.
Claims
1. A spherical roller bearing (1), provided with integrated locking device (2), with tapering cooperating (3, 4) surfaces provided on one hand in the outer envelope surface of a thin-walled sleeve (5) and on the other hand in the inner envelope surface of the bearing inner ring (Ia), an annular flange (6) for tightening devices (7) being arranged for displacing the sleeve (5) and the bearing inner ring (Ia) relative to each other, thereby increasing the grip between bearing inner ring (Ia) and sleeve (5) and between sleeve (5) and a shaft, on which the spherical bearing is to be arrested, said tightening device being arranged in inclined bores (8) in said annular flange (6), and a separate loose thrust flange (9) being provided between the bearing inner ring (Ia) and said annular flange (6), said separate loose thrust flange (9) having a surface (9a) being inclined, thus that it is substantially perpendicular to the extension of said inclined bores (8) in the annular flange (6).
2. A spherical roller bearing (1) with an integrated locking device (2) as claimed in claim 1, characterized therein, that the tightening devices (7) are set screws, adapted to cooperate with corresponding internal threads in the inclined bores (8).
3. A spherical roller bearing (1) with an integrated locking device (2) as claimed in claim 1 or 2, characterized therein, that the annular flange (6) is axially non-displaceable relative to the thin- walled sleeve (5).
4. A spherical roller bearing (1) with an integrated locking device (2) as claimed in claim 3, characterized therein, that the inner thin-walled sleeve (5) at its outer envelope surface has a circumferential groove (10) axially spaced apart from its tapering surfaces, in which groove (10) a circumferential ridge (11) extending inwardly from the inner envelope surface of the annular flange (6) enters for causing said axially non-displaceable relation between flange (6) and sleeve (5).
5. A spherical roller bearing (1) with an integrated locking device (2) as claimed in anyone of the preceding claims, characterized therein, that the spherical roller bearing (1) is equipped with integral sealing members (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2006/001454 WO2008076011A1 (en) | 2006-12-20 | 2006-12-20 | A spherical roller bearing with integrated locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2006/001454 WO2008076011A1 (en) | 2006-12-20 | 2006-12-20 | A spherical roller bearing with integrated locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008076011A1 true WO2008076011A1 (en) | 2008-06-26 |
Family
ID=39536527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2006/001454 WO2008076011A1 (en) | 2006-12-20 | 2006-12-20 | A spherical roller bearing with integrated locking device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008076011A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8510954B2 (en) | 2008-01-15 | 2013-08-20 | Aktiebolaget Skf | Simplified rolling bearing unit and a method for manufacturing such a bearing unit |
| US9261132B2 (en) | 2009-04-24 | 2016-02-16 | Roller Bearing Company Of America, Inc. | Low friction bearing assembly and link apparatus |
| US10023302B2 (en) | 2007-12-06 | 2018-07-17 | Roller Bearing Company Of America, Inc. | Actuation system for a lift assisting device and lined track rollers used therein |
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | A bearing preload device |
| US11149788B2 (en) | 2012-04-30 | 2021-10-19 | Roller Bearing Company Of America, Inc. | Hybrid bearing assembly with rolling elements and plain bearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685650A (en) * | 1996-01-16 | 1997-11-11 | Allen-Bradley Company, Inc. | Bearing assembly utilizing improved clamping arrangement |
| EP0926370A2 (en) * | 1997-12-17 | 1999-06-30 | Skf Mekan Ab | Device for mounting a bearing on a shaft |
| EP0967404A2 (en) * | 1998-06-25 | 1999-12-29 | Skf Mekan Ab | Mounting device for a bearing unit |
| EP1262678A2 (en) * | 2000-05-23 | 2002-12-04 | Skf Mekan Ab | An attachment unit |
-
2006
- 2006-12-20 WO PCT/SE2006/001454 patent/WO2008076011A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685650A (en) * | 1996-01-16 | 1997-11-11 | Allen-Bradley Company, Inc. | Bearing assembly utilizing improved clamping arrangement |
| EP0926370A2 (en) * | 1997-12-17 | 1999-06-30 | Skf Mekan Ab | Device for mounting a bearing on a shaft |
| EP0967404A2 (en) * | 1998-06-25 | 1999-12-29 | Skf Mekan Ab | Mounting device for a bearing unit |
| EP1262678A2 (en) * | 2000-05-23 | 2002-12-04 | Skf Mekan Ab | An attachment unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10023302B2 (en) | 2007-12-06 | 2018-07-17 | Roller Bearing Company Of America, Inc. | Actuation system for a lift assisting device and lined track rollers used therein |
| US8510954B2 (en) | 2008-01-15 | 2013-08-20 | Aktiebolaget Skf | Simplified rolling bearing unit and a method for manufacturing such a bearing unit |
| US9261132B2 (en) | 2009-04-24 | 2016-02-16 | Roller Bearing Company Of America, Inc. | Low friction bearing assembly and link apparatus |
| US11149788B2 (en) | 2012-04-30 | 2021-10-19 | Roller Bearing Company Of America, Inc. | Hybrid bearing assembly with rolling elements and plain bearing |
| CN111795077A (en) * | 2020-06-09 | 2020-10-20 | 江苏理工学院 | A bearing preload device |
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