WO2006027342A1 - Ball bearing unit with an improved ball retaining cage - Google Patents

Ball bearing unit with an improved ball retaining cage Download PDF

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Publication number
WO2006027342A1
WO2006027342A1 PCT/EP2005/054348 EP2005054348W WO2006027342A1 WO 2006027342 A1 WO2006027342 A1 WO 2006027342A1 EP 2005054348 W EP2005054348 W EP 2005054348W WO 2006027342 A1 WO2006027342 A1 WO 2006027342A1
Authority
WO
WIPO (PCT)
Prior art keywords
balls
diameter
centres
cage
pitch line
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/EP2005/054348
Other languages
French (fr)
Inventor
Angelo Vignotto
Fulvio Nicastri
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 DE112005002188.2T priority Critical patent/DE112005002188B4/en
Publication of WO2006027342A1 publication Critical patent/WO2006027342A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/418—Details of individual pockets, e.g. shape or ball retaining means
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Definitions

  • the present invention relates to a ball bearing unit with an improved ball retaining cage.
  • a cage 10 comprises a circular base ring 11 from one side of which a plurality of circumferentially equally spaced C-shaped hooks 12 extend.
  • the base ring 11 and the hooks 12 have partially spherical concave surfaces 15, 16, 17 which together define a plurality of partially spherical sockets or recesses 13 for retaining balls 14 circumferentially equally spaced between the rolling tracks of a bearing.
  • cages of this type have been designed with dimensions such that the balls are seated concentrically inside the sockets, as schematically shown in Figures 6-8. These two geometric conditions are satisfied: a) the centres C13 of the sockets lie on a circumference P13 which coincides with the circumference P14 (known as "pitch line") which passes through the centres of the balls and which is defined by the bearing raceways; b) the spherical surfaces defined by the sockets have a diameter slightly greater than the diameter of the balls.
  • the object of the invention is to provide a bearing unit in which the circumferential play between the balls and the cage is eliminated or at least reduced so that the cage is able to rotate in a more uniform manner about the axis of the bearing and therefore allow more precise and simplified reading of the speed of rotation of the cage.
  • FIG. 1 is an axially sectioned view of a ball bearing provided with two ball retaining cages according to the invention
  • FIG. 1 is a perspective view of the cages according to Figure 1;
  • FIG. 3 is a partial view, sectioned and on a larger scale, of the cage according to Figure 2;
  • FIG. 4 is a schematic perspective view on a larger scale showing the arrangement of a ball inside a socket of the cage according to Figures 2 and 3;
  • FIG. 5 is a perspective view of a cage of the known type
  • FIG. 6 is a partial sectioned view of the cage of Figure 5;
  • FIG. 7 is a view in the direction of the arrow A of Figure 6;
  • FIG. 8 is a schematic perspective view on a larger scale showing the concentric arrangement of a ball inside a socket of a conventional cage of the type shown in Figures 5- 7.
  • a ball bearing unit comprises a stationary outer race 30, two rotatable inner races 31, 32, two series of balls 14 and two respective ball retaining cages 10.
  • the characteristics of the bearing races are not per se important for the purposes of understanding the invention and will therefore not be described in detail.
  • 33 denotes a sensor carrier body having sensors 34 axially facing two annular encoders or phonic wheels 35 (one of which is shown in Figure 3) each mounted on one of the two cages 10 for detecting the rotation of the cages about the axis of rotation x of the bearing, generating electric signals indicating rotation of the cages.
  • the cage 10 forms a circular base ring 11 from one side of which a plurality of circumferentially equidistant C-shaped hooks 12 extend.
  • the base ring 11 and the hooks 12 have partially spherical concave surfaces 15, 16, 17 which together define a plurality of partially spherical sockets or recesses 13 for keeping the balls 14 equally spaced along a pitch line P14 passing through the centres of the balls.
  • the hooks 12 are each formed by two curved arms projecting from the ring 11: a longer arm 19 and a shorter arm 20, both having opposite ends 19a, 20a diverging in a substantially tangential direction.
  • the concave surfaces 15, 16, 17 of each socket together cover an arc which extends over more than 180 degrees around each ball.
  • each socket 13 forms a part of a spherical surface S having a centre Cl3 and a diameter Dl3 slightly greater than the diameter D14 of the balls 14.
  • the circumference P13 passing through the centre of the sockets has a diameter dl3 slightly smaller than the diameter dl4 of the pitch line P14 passing through the centres of the balls 14.
  • the difference between the diameters dl4 and dl3 is smaller than 0.4 mm.
  • the cage When the bearing rotates, the cage assumes a floating equilibrium position where there is a certain axial play ⁇ between the balls and the sockets (as indicated schematically also in Figure 4) , but there is no circumferential play between the cage and the balls.
  • the distance between the centres of two consecutive sockets 13 is slightly smaller than the distance between the centres of two consecutive balls 14.
  • the cage rotates in a uniform manner about the axis of rotation of the bearing.
  • the speed signals detected by a sensor facing the cage are also more uniform and therefore are able to give precise indications as to the instantaneous speed of rotation of the bearing without requiring special modifications for eliminating the effects of the variations due to the impacts in the circumferential direction, as discussed in the introductory part of the description with reference to the known art.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A ball bearing unit comprises an outer race (30), one or two inner races (31, 32), one or two series of balls (14) arranged between the inner race and the outer race. The balls have a diameter (D14) and centres (C14) arranged along a pitch line (P14) having a diameter (d14). The bearing unit comprises at least one cage (10) for keeping the balls (14) equally spaced along said pitch line. The cage forms a plurality of sockets (13) for receiving the balls (14). Each socket (13) forms a part of a hollow spherical surface (S) having a centre (C13) and a diameter (D13) slightly greater than the diameter (D14) of the balls (14). The centres (C13) of the spherical surfaces (S) are arranged along a circumference (P13) having a diameter (d13). The diameter (d13) of the circumference (P13) passing through the centres of the spherical surfaces (S) is smaller than the diameter (d14) of the pitch line (P14) passing through the centres (C14) of the balls (14).

Description

Ball bearing unit with an improved ball retaining cage
The present invention relates to a ball bearing unit with an improved ball retaining cage.
For a better understanding of the state of the art and the problems relating thereto, a retaining cage of the type known from EP-A 0,592,839 will first be described. With reference to Figures 5 to 8, a cage 10 comprises a circular base ring 11 from one side of which a plurality of circumferentially equally spaced C-shaped hooks 12 extend. The base ring 11 and the hooks 12 have partially spherical concave surfaces 15, 16, 17 which together define a plurality of partially spherical sockets or recesses 13 for retaining balls 14 circumferentially equally spaced between the rolling tracks of a bearing.
Hitherto, cages of this type have been designed with dimensions such that the balls are seated concentrically inside the sockets, as schematically shown in Figures 6-8. These two geometric conditions are satisfied: a) the centres C13 of the sockets lie on a circumference P13 which coincides with the circumference P14 (known as "pitch line") which passes through the centres of the balls and which is defined by the bearing raceways; b) the spherical surfaces defined by the sockets have a diameter slightly greater than the diameter of the balls.
Consequently, between each ball and the respective socket there exists a slight play both in the circumferential direction and in the axial direction. Owing to the play in the circumferential direction, during operation the cage is continually struck by the balls so that the cage does not rotate at a constant instantaneous speed about the axis of rotation of the bearing, but is jolted about this axis.
The present invention is intended to be used, in particular but not exclusively, for bearing assemblies comprising sensor devices for detecting the rotation of the bearing, as for example described in GB-A-2, 382, 142. In these applications, an encoder is mounted on the cage and associated operationally with a sensor arranged on the stationary ring of the bearing.
The object of the invention is to provide a bearing unit in which the circumferential play between the balls and the cage is eliminated or at least reduced so that the cage is able to rotate in a more uniform manner about the axis of the bearing and therefore allow more precise and simplified reading of the speed of rotation of the cage.
This object is achieved, according to a first aspect of the invention, by a bearing unit having the characteristic features defined in Claim 1. According to another aspect of the invention, this object is achieved by a bearing assembly according to Claim 2.
A preferred, but non-limiting embodiment of the invention will now be described, with reference to the accompanying drawings, in which:
- Figure 1 is an axially sectioned view of a ball bearing provided with two ball retaining cages according to the invention;
- Figure 2 is a perspective view of the cages according to Figure 1;
- Figure 3 is a partial view, sectioned and on a larger scale, of the cage according to Figure 2;
- Figure 4 is a schematic perspective view on a larger scale showing the arrangement of a ball inside a socket of the cage according to Figures 2 and 3;
- Figure 5 is a perspective view of a cage of the known type;
- Figure 6 is a partial sectioned view of the cage of Figure 5;
- Figure 7 is a view in the direction of the arrow A of Figure 6; and
- Figure 8 is a schematic perspective view on a larger scale showing the concentric arrangement of a ball inside a socket of a conventional cage of the type shown in Figures 5- 7.
With reference initially to Figure 1, a ball bearing unit comprises a stationary outer race 30, two rotatable inner races 31, 32, two series of balls 14 and two respective ball retaining cages 10. The characteristics of the bearing races are not per se important for the purposes of understanding the invention and will therefore not be described in detail. 33 denotes a sensor carrier body having sensors 34 axially facing two annular encoders or phonic wheels 35 (one of which is shown in Figure 3) each mounted on one of the two cages 10 for detecting the rotation of the cages about the axis of rotation x of the bearing, generating electric signals indicating rotation of the cages.
As shown in Figure 2, the cage 10 forms a circular base ring 11 from one side of which a plurality of circumferentially equidistant C-shaped hooks 12 extend. The base ring 11 and the hooks 12 have partially spherical concave surfaces 15, 16, 17 which together define a plurality of partially spherical sockets or recesses 13 for keeping the balls 14 equally spaced along a pitch line P14 passing through the centres of the balls. The hooks 12 are each formed by two curved arms projecting from the ring 11: a longer arm 19 and a shorter arm 20, both having opposite ends 19a, 20a diverging in a substantially tangential direction. The concave surfaces 15, 16, 17 of each socket together cover an arc which extends over more than 180 degrees around each ball.
As shown in Figure 3, each socket 13 forms a part of a spherical surface S having a centre Cl3 and a diameter Dl3 slightly greater than the diameter D14 of the balls 14.
According to the invention, the circumference P13 passing through the centre of the sockets has a diameter dl3 slightly smaller than the diameter dl4 of the pitch line P14 passing through the centres of the balls 14. Preferably the difference between the diameters dl4 and dl3 is smaller than 0.4 mm. Owing to this arrangement, during operation the cage 10 is arranged in a position where the circumference P13 is axially displaced by a distance Δ from the pitch line P14 towards the opposite side of the base ring 11 of the cage.
When the bearing rotates, the cage assumes a floating equilibrium position where there is a certain axial play Δ between the balls and the sockets (as indicated schematically also in Figure 4) , but there is no circumferential play between the cage and the balls. The distance between the centres of two consecutive sockets 13 is slightly smaller than the distance between the centres of two consecutive balls 14.
Those skilled in the art will recognise that this absence of circumferential play is accompanied, as mentioned, by an axially floating (and therefore free) condition of the cage where the balls lightly touch the free end zones 19a of the projecting hooks. There is no contact, however, between the balls 14 and the base ring 11 (Figure 4) .
Owing to the absence of an appreciable amount of circumferential play, the cage rotates in a uniform manner about the axis of rotation of the bearing. As a result, the speed signals detected by a sensor facing the cage are also more uniform and therefore are able to give precise indications as to the instantaneous speed of rotation of the bearing without requiring special modifications for eliminating the effects of the variations due to the impacts in the circumferential direction, as discussed in the introductory part of the description with reference to the known art.
Obviously, without modifying the principle of the invention, the constructional details and the embodiments may be widely varied with respect to that described and illustrated, without thereby departing from the scope of the present invention.

Claims

1. A ball bearing unit of the type comprising:
- an outer race (30) ,
- at least one inner race (31, 32) ,
- at least one series of balls (14) arranged between the inner race and the outer race, the balls having a diameter (D14) and centres (C14) arranged along a pitch line (P14) having a diameter (dl4),
- at least one cage (10) for keeping the balls (14) equally spaced along said pitch line, wherein the cage forms a plurality of sockets (13) for receiving said balls (14) , each socket (13) forming a part of a hollow spherical surface (S) having a centre (C13) and a diameter (D13) slightly greater than the diameter (D14) of the balls (14), the centres (C13) of the spherical surfaces (S) being arranged along a circumference (P13) having a diameter (dl3) ; characterized in that the diameter (dl3) of the circumference (P13) passing through the centres of the spherical surfaces (S) is smaller than the diameter (dl4) of the pitch line (P14) passing through the centres (C14) of the balls (14) .
2. A bearing assembly comprising:
- at least one outer race (30) and at least one inner race (31, 32) , where at least one (30) of said races is stationary and at least another one of said races is rotatable (31, 32);
- at least one series of balls (14) arranged between said races (30, 31, 32), the balls having a diameter (D14) and centres (C14) arranged along a pitch line (P14) having a diameter (dl4) ,
- at least one cage (10) for keeping the balls (14) equally spaced along said pitch line, where the cage forms a plurality of sockets (13) for receiving said balls (14) , where each socket (13) forms a part of a hollow spherical surface (S) having a centre (C13) and a diameter (D13) slightly greater than the diameter (D14) of the balls (14) , the centres (C13) of the spherical surfaces (S) being arranged along a circumference (P13) having a diameter (dl3) ;
- at least one annular encoder (35) fixed onto the cage (10); characterized in that the diameter (dl3) of the circumference (P13) passing through the centres of the spherical surfaces (S) is smaller than the diameter (dl4) of the pitch line (P14) passing through the centres (C14) of the balls (14) .
PCT/EP2005/054348 2004-09-09 2005-09-05 Ball bearing unit with an improved ball retaining cage Ceased WO2006027342A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005002188.2T DE112005002188B4 (en) 2004-09-09 2005-09-05 Ball bearing unit with an improved rolling element cage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2004A000594 2004-09-09
IT000594A ITTO20040594A1 (en) 2004-09-09 2004-09-09 BALL BEARING UNIT WITH PERFECTED BALL HOLDING CAGE

Publications (1)

Publication Number Publication Date
WO2006027342A1 true WO2006027342A1 (en) 2006-03-16

Family

ID=35355872

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/054348 Ceased WO2006027342A1 (en) 2004-09-09 2005-09-05 Ball bearing unit with an improved ball retaining cage

Country Status (3)

Country Link
DE (1) DE112005002188B4 (en)
IT (1) ITTO20040594A1 (en)
WO (1) WO2006027342A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2972034A1 (en) * 2011-02-25 2012-08-31 Ntn Snr Roulements CAGE RETAINING BALLS IN A BEARING BEARING ALONG A CIRCLE PASSING THROUGH THE CENTER DESDITS BALLS
FR3021720A1 (en) * 2014-05-30 2015-12-04 Ntn Snr Roulements CAGE FOR RETENTION OF ROLLING BODIES IN A BEARING BEARING
US20200132119A1 (en) * 2018-10-24 2020-04-30 Aktiebolaget Skf Bearing unit with retaining cage
WO2021100500A1 (en) 2019-11-19 2021-05-27 日本精工株式会社 Angular ball bearing retainer, angular ball bearing, and hub unit bearing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213232A1 (en) * 2015-07-15 2017-01-19 Aktiebolaget Skf Crown cage for a rolling bearing and method for its production

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538474A1 (en) * 1982-12-24 1984-06-29 Skf Kugellagerfabriken Gmbh CAGE FOR BALL BEARINGS, ESPECIALLY FOR OBLIQUE CONTACT BALL BEARINGS
US4493513A (en) * 1982-06-23 1985-01-15 Nippon Seiko Kabushiki Kaisha Bearing cage for retaining rolling elements
EP0592839A1 (en) 1992-10-15 1994-04-20 SKF INDUSTRIE S.p.A. Retention cage for the balls of rolling-contact bearings
US6276836B1 (en) * 1996-12-27 2001-08-21 Nsk Ltd. Cage for radial ball bearing
GB2382142A (en) 2001-11-16 2003-05-21 Nsk Europ Technology Co Ltd Wheel bearing assemblies incorporating sensing arrangements
US20030103703A1 (en) * 1999-05-24 2003-06-05 Nsk Ltd. Retainer for rolling bearing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4006836B2 (en) * 1997-08-18 2007-11-14 日本精工株式会社 Ball bearing
FR2796680B1 (en) * 1999-07-23 2001-09-14 Skf France CAGE DEVICE FOR BALL BEARING AND ASSOCIATED BEARING

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4493513A (en) * 1982-06-23 1985-01-15 Nippon Seiko Kabushiki Kaisha Bearing cage for retaining rolling elements
FR2538474A1 (en) * 1982-12-24 1984-06-29 Skf Kugellagerfabriken Gmbh CAGE FOR BALL BEARINGS, ESPECIALLY FOR OBLIQUE CONTACT BALL BEARINGS
EP0592839A1 (en) 1992-10-15 1994-04-20 SKF INDUSTRIE S.p.A. Retention cage for the balls of rolling-contact bearings
US6276836B1 (en) * 1996-12-27 2001-08-21 Nsk Ltd. Cage for radial ball bearing
US20030103703A1 (en) * 1999-05-24 2003-06-05 Nsk Ltd. Retainer for rolling bearing
GB2382142A (en) 2001-11-16 2003-05-21 Nsk Europ Technology Co Ltd Wheel bearing assemblies incorporating sensing arrangements

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2972034A1 (en) * 2011-02-25 2012-08-31 Ntn Snr Roulements CAGE RETAINING BALLS IN A BEARING BEARING ALONG A CIRCLE PASSING THROUGH THE CENTER DESDITS BALLS
FR3021720A1 (en) * 2014-05-30 2015-12-04 Ntn Snr Roulements CAGE FOR RETENTION OF ROLLING BODIES IN A BEARING BEARING
US20200132119A1 (en) * 2018-10-24 2020-04-30 Aktiebolaget Skf Bearing unit with retaining cage
US11035409B2 (en) * 2018-10-24 2021-06-15 Aktiebolaget Skf Bearing unit with retaining cage
WO2021100500A1 (en) 2019-11-19 2021-05-27 日本精工株式会社 Angular ball bearing retainer, angular ball bearing, and hub unit bearing
CN114651137A (en) * 2019-11-19 2022-06-21 日本精工株式会社 Retainer for angular ball bearing, and hub unit bearing
EP4063676A1 (en) 2019-11-19 2022-09-28 NSK Ltd. Angular ball bearing retainer, angular ball bearing, and hub unit bearing
CN114651137B (en) * 2019-11-19 2024-08-20 日本精工株式会社 Angular contact ball bearing retainer, angular contact ball bearing and hub unit bearing
US12103332B2 (en) 2019-11-19 2024-10-01 Nsk Ltd. Retainer for angular contact ball bearing, angular contact ball bearing, and hub unit bearing

Also Published As

Publication number Publication date
ITTO20040594A1 (en) 2004-12-09
DE112005002188T5 (en) 2007-08-16
DE112005002188B4 (en) 2020-04-16

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