WO2009091297A1 - Simplified rolling bearing unit and a method for manufacturing such a bearing unit - Google Patents

Simplified rolling bearing unit and a method for manufacturing such a bearing unit Download PDF

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Publication number
WO2009091297A1
WO2009091297A1 PCT/SE2008/000711 SE2008000711W WO2009091297A1 WO 2009091297 A1 WO2009091297 A1 WO 2009091297A1 SE 2008000711 W SE2008000711 W SE 2008000711W WO 2009091297 A1 WO2009091297 A1 WO 2009091297A1
Authority
WO
WIPO (PCT)
Prior art keywords
race ring
inner race
tooth profile
sleeve
saw
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.)
Ceased
Application number
PCT/SE2008/000711
Other languages
French (fr)
Inventor
Sture Östling
Franco Ollagnero
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF AB
Original Assignee
SKF AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SKF AB filed Critical SKF AB
Priority to US12/812,990 priority Critical patent/US8510954B2/en
Priority to JP2010543074A priority patent/JP5351177B2/en
Priority to EP08870784.9A priority patent/EP2242937B1/en
Priority to CN2008801280708A priority patent/CN101970894B/en
Publication of WO2009091297A1 publication Critical patent/WO2009091297A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass 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
    • 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
    • F16C33/64—Special methods of manufacture
    • 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
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
    • 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
    • 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
    • F16C23/084—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface sliding on a complementary spherical surface
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49679—Anti-friction bearing or component thereof
    • Y10T29/49682—Assembling of race and rolling anti-friction members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49679—Anti-friction bearing or component thereof
    • Y10T29/49682—Assembling of race and rolling anti-friction members
    • Y10T29/49684—Assembling of race and rolling anti-friction members with race making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49707—Bearing surface treatment

Definitions

  • the present invention refers to a simplified rolling bearing unit of the type referred to as an insert bearing unit, incorporating an outer race ring having a spherically curved outer envelope surface and a circumferential groove provided in the inner envelope surface, and an inner race ring having an outer envelope surface with a circumferential groove and an inner envelope surface with a tapering saw-tooth profile extending in the axial direction of the inner race ring, a thin-walled sleeve, which is slotted by means of an axially extending slot and has a tapering saw-tooth profile on its outer envelope surface, cooperating with the saw-tooth profile in the inner envelope surface of the inner race ring for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when the inner race ring and the thin-walled sleeve are displaced axially relative to each other, a flange member being connected to the exterior of the thin-walled sleeve and provided with a tightening member operable to cause the
  • Such a bearing unit is for instance disclosed in EP 0 967 404 A2, where the flange is provided with a set screw inserted in a bore having its axis inclined towards the axis of the inner race ring and having a front end engaging one side face of the inner race ring.
  • PCT/SE2006/001454 refers to a two-row spherical roller bearing wherein the inclined set screw is arranged to act against a loose thrust flange positioned between the end of the set screw and the inner race ring of the bearing, said loose thrust flange having a sloping side face facing the set screw, with such an inclination that the free end of the set screw acts perpendicularly against the surface of the loose thrust flange.
  • the saw-tooth profiled inner envelope surface of the inner race ring has been subjected to machining incorporating a finalizing grinding operation.
  • the resulting bearing units have proven themselves to be efficient and reliable, although the manufacturing costs are rather high.
  • a purpose of the present invention is to propose a simplified rolling bearing unit of the type initially described, and which without being inferior in efficiency and reliability, can be produced at a substantially reduced cost, and this has been achieved in that the ball bearing unit has the features defined in the accompanying claim 1.
  • Another purpose of the invention is to propose a manufacturing method for production of such a simplified ball bearing unit, and that method is defined in the accompanying claim 433.
  • Fig. 1 is a schematic sectional view of a portion of an insert bearing unit according to the invention.
  • Fig. 2 is a cross section through a similar bearing unit in accordance with the present invention.
  • Fig. 1 is shown, in a schematic longitudinal section, a portion of a bearing unit according to the invention, and incorporating an outer race ring 1 having a spherically curved outer envelope surface 2 and a circumferential groove 3 provided in the inner envelope surface, and an inner race ring 4 having an outer envelope surface with a circumferential groove 5 and an inner envelope surface with a tapering saw-tooth profile 6 extending in the axial direction of the inner race ring, a thin-walled sleeve 7, which is slotted by means of an axially extending slot 8 (see Fig.
  • the thin-walled sleeve 7 has a longitudinal slot 8, allowing the sleeve to be compressed when the sleeve 7 and the inner race ring are displaced relative to each other.
  • the sleeve 7 is at one end provided with a radially outwardly projecting annular shoulder 13 adapted to engage in a recess in the side of the flange member 10 facing away from the bearing inner race ring 4, thereby forming a positive interconnection between sleeve 7 and flange member 10, thus that the longitudinal mutual displacement between the sleeve 7 and the inner race ring 4 is achieved when the tightening member 11 is tightened to introduce a force between sleeve and race ring.
  • the balls 12 are preferably guided and spaced apart by means of a cage 14.
  • the space between the outer race ring 1 and the inner race ring 4 at one or both sides of the bearing are sealed off by means of sealing devices 15, which can be either non-contacting and/or contacting seals.
  • the outer race ring 1 is provided with a through-channel 16 intended for supply of lubricant to the interior of the bearing. This through- channel 16 is preferably provided with a not shown grease nipple.
  • the inner race ring of the bearing is designed, manufactured and treated in order to give a black ring, where the multi-step profile is ready to use, whereby this part will not be subjected to any further grinding operation.
  • the bore of the inner race ring of the bearing, and the saw-tooth profile therein, is produced by soft turning, whereupon at least the inner surface portion of the inner race ring is subjected to hardening, which will allow to minimize the inner ring distortion, especially in the bore.
  • Such hardening can preferably be performed by induction hardening, although it is also possible to subject the inner race ring 4 to a through hardening operation.
  • the manufacturing cost has been reduced with between 25 and 30 %.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Support Of The Bearing (AREA)

Abstract

The invention refers to a bearing unit and a method for its manufacture incorporating an outer race ring (1), an inner race ring (4) having an inner envelope surface with an axially tapering saw-tooth profile (6), a thin-walled axially slotted sleeve (7), having a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner race ring (4) for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when inner race ring (4) and sleeve (7) are mutually displaced, a flange (10) connected to the sleeve (7) and having tightening means (11) operable to cause the displacement between sleeve (7) and inner race ring (4), rolling bodies (12) positioned between inner and outer race rings, wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) has been subjected to a turning operation followed by hardening.

Description

SIMPLIFIED ROLLING BEARING UNIT AND A METHOD FOR MANUFACTURING SUCH A BEARING UNIT
The present invention refers to a simplified rolling bearing unit of the type referred to as an insert bearing unit, incorporating an outer race ring having a spherically curved outer envelope surface and a circumferential groove provided in the inner envelope surface, and an inner race ring having an outer envelope surface with a circumferential groove and an inner envelope surface with a tapering saw-tooth profile extending in the axial direction of the inner race ring, a thin-walled sleeve, which is slotted by means of an axially extending slot and has a tapering saw-tooth profile on its outer envelope surface, cooperating with the saw-tooth profile in the inner envelope surface of the inner race ring for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when the inner race ring and the thin-walled sleeve are displaced axially relative to each other, a flange member being connected to the exterior of the thin-walled sleeve and provided with a tightening member operable to cause the mutual displacement between sleeve and inner race ring, the grooves in the outer and inner race rings being positioned in such a manner relative to each other so as to form together a race track for a number of balls positioned between the grooves.
Such a bearing unit is for instance disclosed in EP 0 967 404 A2, where the flange is provided with a set screw inserted in a bore having its axis inclined towards the axis of the inner race ring and having a front end engaging one side face of the inner race ring.
PCT/SE2006/001454 refers to a two-row spherical roller bearing wherein the inclined set screw is arranged to act against a loose thrust flange positioned between the end of the set screw and the inner race ring of the bearing, said loose thrust flange having a sloping side face facing the set screw, with such an inclination that the free end of the set screw acts perpendicularly against the surface of the loose thrust flange. In both these bearings the saw-tooth profiled inner envelope surface of the inner race ring has been subjected to machining incorporating a finalizing grinding operation. The resulting bearing units have proven themselves to be efficient and reliable, although the manufacturing costs are rather high.
A purpose of the present invention is to propose a simplified rolling bearing unit of the type initially described, and which without being inferior in efficiency and reliability, can be produced at a substantially reduced cost, and this has been achieved in that the ball bearing unit has the features defined in the accompanying claim 1.
Another purpose of the invention is to propose a manufacturing method for production of such a simplified ball bearing unit, and that method is defined in the accompanying claim 433.
Hereinafter the invention will be further described with reference to the accompanying drawings, schematically illustrating embodiments of the simplified ball bearing unit according to the invention.
Fig. 1 is a schematic sectional view of a portion of an insert bearing unit according to the invention, and
Fig. 2 is a cross section through a similar bearing unit in accordance with the present invention.
In Fig. 1 is shown, in a schematic longitudinal section, a portion of a bearing unit according to the invention, and incorporating an outer race ring 1 having a spherically curved outer envelope surface 2 and a circumferential groove 3 provided in the inner envelope surface, and an inner race ring 4 having an outer envelope surface with a circumferential groove 5 and an inner envelope surface with a tapering saw-tooth profile 6 extending in the axial direction of the inner race ring, a thin-walled sleeve 7, which is slotted by means of an axially extending slot 8 (see Fig. 2) and has a tapering saw-tooth profile 9 on its outer envelope surface, cooperating with the saw-tooth profile 6 in the inner envelope surface of the inner race ring 4 for increasing and decreasing the grip of the thin-walled sleeve against a shaft (not shown), when the inner race ring and the thin-walled sleeve are displaced axially relative to each other, a flange member 10 being connected to the exterior of the thin-walled sleeve 7 and provided with a tightening member 11 operable to cause the mutual displacement between sleeve 7 and inner race ring 4, the grooves 3, 5 in the outer and inner race rings 1, 4 being positioned in such a manner relative to each other so as to form together a race track for a number of balls 12 positioned between the grooves.
In earlier embodiments of bearing units of this type the bore of the inner race ring has been subjected to hard machining terminated with a grinding operation.
As can be seen in Fig. 2 the thin-walled sleeve 7 has a longitudinal slot 8, allowing the sleeve to be compressed when the sleeve 7 and the inner race ring are displaced relative to each other. The sleeve 7 is at one end provided with a radially outwardly projecting annular shoulder 13 adapted to engage in a recess in the side of the flange member 10 facing away from the bearing inner race ring 4, thereby forming a positive interconnection between sleeve 7 and flange member 10, thus that the longitudinal mutual displacement between the sleeve 7 and the inner race ring 4 is achieved when the tightening member 11 is tightened to introduce a force between sleeve and race ring. The balls 12 are preferably guided and spaced apart by means of a cage 14. The space between the outer race ring 1 and the inner race ring 4 at one or both sides of the bearing are sealed off by means of sealing devices 15, which can be either non-contacting and/or contacting seals. In the embodiment illustrated in Fig. 2, the outer race ring 1 is provided with a through-channel 16 intended for supply of lubricant to the interior of the bearing. This through- channel 16 is preferably provided with a not shown grease nipple.
According to the present invention, the inner race ring of the bearing is designed, manufactured and treated in order to give a black ring, where the multi-step profile is ready to use, whereby this part will not be subjected to any further grinding operation. The bore of the inner race ring of the bearing, and the saw-tooth profile therein, is produced by soft turning, whereupon at least the inner surface portion of the inner race ring is subjected to hardening, which will allow to minimize the inner ring distortion, especially in the bore. Such hardening can preferably be performed by induction hardening, although it is also possible to subject the inner race ring 4 to a through hardening operation. By this method a black ring is produced, due to the fact that the ring is not ground anymore after the hardening operation, and it has been established that the quality of the saw-tooth-shaped surface of the bore of the inner race ring is sufficient for cooperation with the corresponding saw-tooth profile in the outer envelope surface of the thin-walled sleeve 7, and without need for the finalizing grinding operation which has earlier been applied to the bore surface.
The use of a black inner race ring and a conventional sleeve is a different and non-conventional matching of profiles, which will enable to obtain a unique performing clamping on a shaft due to the combined stiffness and tolerance of the inner race ring and the sleeve.
With such a modified manufacturing method, the manufacturing cost has been reduced with between 25 and 30 %.
The invention is not limited to the bearing illustrated in the drawing, and described in connection thereto, but variants and modifications are possible within the scope of the claims attached hereto.

Claims

1. A bearing unit incorporating an outer race ring (1) having a circumferential groove (3) provided in the inner envelope surface, and an inner race ring (4) having an outer envelope surface with a circumferential groove (5) and an inner envelope surface with a tapering saw-tooth profile (6) extending in the axial direction of the inner race ring, a thin-walled sleeve (7), which is slotted by means of an axially extending slot (8) and has a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner envelope surface of the inner race ring (4) for increasing and decreasing the grip of the thin-walled sleeve against a shaft, when the inner race ring (4) and the thin-walled sleeve (7) are displaced axially relative to each other, a flange member (10) being connected to the exterior of the thin- walled sleeve (7) and provided with a tightening member (11) operable to cause the mutual displacement between sleeve (7) and inner race ring (4), the grooves (3, 5) in the outer and inner race rings (1, 4) being positioned in such a manner relative to each other so as to form together a race track for a number of rolling bodies (12) positioned between the grooves, wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) is a surface which has been subjected to a turning operation followed by a hardening operation.
2. A bearing unit as claimed in claim 1, wherein the outer race ring (1) has a spherically curved outer envelope surface (2).
3. A bearing unit as claimed in claim 1 or 2, wherein the surface layer of the inner race ring (4) facing the thin-walled sleeve (7) is a hardened surface layer.
4. A method for manufacturing a bearing unit incorporating an outer race ring (1), and an inner race ring (4) having an inner envelope surface with a tapering saw-tooth profile (6) extending in the axial direction of the inner race ring, a thin-walled sleeve (7), which is slotted by means of an axially extending slot (8) and has a tapering saw-tooth profile (9) on its outer envelope surface, cooperating with the saw-tooth profile (6) in the inner envelope surface of the inner race ring (4), a flange member (10) being connected to the exterior of the thin-walled sleeve (7) and provided with a tightening member (11) operable to cause mutual displacement between sleeve (7) and inner race ring (4), wherein the surface of the inner race ring (4) presenting the tapering saw-tooth profile (6) is subjected to a soft turning operation, whereupon at least the surface layer facing the sleeve (7) is subjected to a hardening operation.
5. A method as claimed in claim 4, wherein the surface layer of the inner race ring (4) which has been soft turned is subjected to a induction hardening operation.
PCT/SE2008/000711 2008-01-15 2008-12-17 Simplified rolling bearing unit and a method for manufacturing such a bearing unit Ceased WO2009091297A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/812,990 US8510954B2 (en) 2008-01-15 2008-12-17 Simplified rolling bearing unit and a method for manufacturing such a bearing unit
JP2010543074A JP5351177B2 (en) 2008-01-15 2008-12-17 Simplified rotary bearing unit and method of manufacturing such a bearing unit
EP08870784.9A EP2242937B1 (en) 2008-01-15 2008-12-17 Simplified rolling bearing unit and a method for manufacturing such a bearing unit
CN2008801280708A CN101970894B (en) 2008-01-15 2008-12-17 Simplified rolling bearing unit and method of manufacturing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0800084A SE531355C2 (en) 2008-01-15 2008-01-15 Simplified rolling bearing unit and a method for manufacturing such bearing unit
SE0800084-6 2008-01-15

Publications (1)

Publication Number Publication Date
WO2009091297A1 true WO2009091297A1 (en) 2009-07-23

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Application Number Title Priority Date Filing Date
PCT/SE2008/000711 Ceased WO2009091297A1 (en) 2008-01-15 2008-12-17 Simplified rolling bearing unit and a method for manufacturing such a bearing unit

Country Status (6)

Country Link
US (1) US8510954B2 (en)
EP (1) EP2242937B1 (en)
JP (1) JP5351177B2 (en)
CN (1) CN101970894B (en)
SE (1) SE531355C2 (en)
WO (1) WO2009091297A1 (en)

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FR3004770B1 (en) * 2013-04-23 2015-08-21 Skf Ab BEARING BEARING DEVICE FOR STEERING COLUMN
US11199221B1 (en) * 2015-12-10 2021-12-14 Mauro Commercial Industries Of Vero Beach, Llc Precision single-bearing set roller guide wheel and low profile positioning stages using the same

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Publication number Publication date
CN101970894A (en) 2011-02-09
US8510954B2 (en) 2013-08-20
US20100290730A1 (en) 2010-11-18
SE0800084L (en) 2009-03-03
EP2242937B1 (en) 2019-08-14
EP2242937A1 (en) 2010-10-27
EP2242937A4 (en) 2016-02-17
SE531355C2 (en) 2009-03-03
JP5351177B2 (en) 2013-11-27
CN101970894B (en) 2013-04-24
JP2011510238A (en) 2011-03-31

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