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US20010018803A1 - Device for axial attachment - Google Patents

Device for axial attachment Download PDF

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Publication number
US20010018803A1
US20010018803A1 US09/313,597 US31359799A US2001018803A1 US 20010018803 A1 US20010018803 A1 US 20010018803A1 US 31359799 A US31359799 A US 31359799A US 2001018803 A1 US2001018803 A1 US 2001018803A1
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US
United States
Prior art keywords
bearing
edge
circumference
outer ring
runner shell
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
Application number
US09/313,597
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US6279231B1 (en
Inventor
Berthold Beyfuss
Hans-Jurgen Friedrich
Peter Horling
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 GmbH
Original Assignee
SKF GmbH
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 GmbH filed Critical SKF GmbH
Assigned to SKF GMBH reassignment SKF GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEYFUSS, BERTHOLD, FRIEDRICH, HANS-JURGEN, HORLING, PETER
Application granted granted Critical
Publication of US6279231B1 publication Critical patent/US6279231B1/en
Publication of US20010018803A1 publication Critical patent/US20010018803A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • 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
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the housing
    • 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
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer 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
    • 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
    • Y10T29/49696—Mounting
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49936—Surface interlocking

Definitions

  • the present invention relates to improvements in axial attachment means and more specifically to a method and system for making so called “runner shells” for seating bearings and the like.
  • the resulting edge material from which the bent over wedge is formed is not uniform in thickness, axial height, and radius of curvature.
  • the ring shaped die uniformly compresses the edge material around the outer ring of the bearing causing non-uniform stresses on the outer ring of the bearing leading to unallowable deformation of the outer ring pushing it out of its circular shape. This deformation leads to premature failure of the roller bearing.
  • the way to prevent this unallowable deformation is to uniformly deform edge material such that the stresses and hence deformation is uniform around the outer ring.
  • This invention solves that problem by making the ring shaped forming or wedging surface or edge deforming die non-uniform in height so that during the edge forming process the same amount of material and thus equal stresses are formed around the circumference of the outer ring of the bearing
  • the task of the invention is to create a device for axial attachment of the type cited above which does not cause any deformation of the roller bearing even when the seating conditions are not uniform.
  • the task is accomplished in that the axial height of the wedging surface of the ring-shaped die is adapted to the circumference of the housing material in cases where the degree to which this material projects varies around the circumference.
  • the die face configuration is selectively varied around its circumference so that the material displaced to form the bead is generally the same around the circumference and thus generally uniform. Equal stresses are produced which prevents undesirable distortion of the outer ring during the edge forming process.
  • FIG. 1 shows a plan view of a bearing plate with closely adjacent seating surfaces for roller bearings
  • FIG. 2 shows a cross section along line A-A of FIG. 1 with the roller bearings installed
  • FIG. 3 shows a cross-sectional profile along line B-B of FIG. 1;
  • FIG. 4 shows a partial longitudinal cross section along line C-C of FIG. 1;
  • FIG. 5 shows a partial longitudinal cross section along line D-D of FIG. 1;
  • FIG. 6 shows the contact line between the ring-shaped die and the material to be wedged in a developed view extending between cross sections C and D of FIG. 1;
  • FIG. 7 is a perspective view of the ring-shaped die for the method of the present invention.
  • FIG. 8 is a sectional view of FIG. 7 taken on lines E-E.
  • the bearing plate shown in the figures is produced by deep-drawing a flat blank.
  • the steel sheet blank is first drawn into its external shape and then drawn again to produce the holes in the centers of the roller bearing seats.
  • outer rings 1 are nearly touching, there is no longer any more material present in the area between their lateral surfaces 2 at the narrowest point. What remains is merely a section of web 3 in area 4 of the bearing plate, which is still flat, as can be seen in FIG. 2. Proceeding from this weakest point, however, the axial width increases continuously until it reaches the full width of deep-drawn, shell-shaped section 5 , as can be seen in FIG. 2. As a result, arched or folded transition regions 6 of great rigidity are obtained, which keep seating surfaces 7 , which are interrupted at the weakest point, dimensionally stable.
  • Cutaway area 8 As a result of circular, cutaway areas 8 in outer rings 1 , web section 3 can be wider, which increases the dimensional stability. Cutaway area 8 also accepts a flange-shaped edge section 9 of shell-like section 5 . This flange- like section forms axial contact surfaces 10 for the associated outer rings 1 .
  • Corresponding cutaway areas 8 on the other side of outer rings 1 allow parts 11 of the material of the bearing plate to be pushed in to define a rib 1 la engaging in a circumferential groove G in the outer ring and produce a positive, form-locking attachment of outer rings 1 .
  • the axial height of wedging surface 13 of ring-shaped die 14 is adapted to the height of the material before the wedging operation. More specifically, the axial height of the die is varied around the circumference and is a greater depth or height Hg in the semi-circle right of the plane 12 - 12 than the height Hs in the semicircle left of the plane 12 - 12 . In this phase, therefore, ring- shaped die 14 lies uniformly on the material to be deformed all the way around, except in the material-free area near web section 3 . This can be seen in the partial developed view shown to FIG. 6.
  • the height of the wedging surface 13 in the semi-circle overlying the right side of plane 12 - 12 decreases continuously in order to adapt to the height of the material.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)
  • Clamps And Clips (AREA)

Abstract

A method for securing the outer ring of the bearing in a runner shell wherein the radius of an edge defining the seat for the bearing varies in a predetermined manner around its circumference, the steps comprising, positioning an outer ring of the bearing in the seat of the runner shell so that the edge of the runner shell overlies a circumferentially extending seating groove in the outer ring, placing a die having a forming face in engagement with the peripheral edge of the runner shell, and deforming by means of a die, the edge of the runner shell seat in a manner to displace essentially the same material around the circumference of the edge into the bearing groove, thereby producing a generally uniform force on the bearing ring around the circumference of the ring which eliminates distortion thereof.

Description

    FIELD OF THE INVENTION
  • The present invention relates to improvements in axial attachment means and more specifically to a method and system for making so called “runner shells” for seating bearings and the like. [0001]
    • BACKGROUND OF THE INVENTION
  • It is already known from DE 2,335,701 that an outer ring for a ball bearing can be pressed into a runner shell and that this can then be secured axially by wedging a ring over it. [0002]
  • The material of the runner shell which projects axially beyond the seating surface is thus axially deformed, i.e., flattened and bent over, and thus a certain amount of material is pushed against the outer ring in the radial and axial directions. As a result, a reliable, positive form-locking connection is achieved. [0003]
  • When runner shells are drawn (formed by pressing a die into a flat sheet of metal) the resulting edge material from which the bent over wedge is formed is not uniform in thickness, axial height, and radius of curvature. In prior art, the ring shaped die uniformly compresses the edge material around the outer ring of the bearing causing non-uniform stresses on the outer ring of the bearing leading to unallowable deformation of the outer ring pushing it out of its circular shape. This deformation leads to premature failure of the roller bearing. The way to prevent this unallowable deformation is to uniformly deform edge material such that the stresses and hence deformation is uniform around the outer ring. [0004]
  • This invention solves that problem by making the ring shaped forming or wedging surface or edge deforming die non-uniform in height so that during the edge forming process the same amount of material and thus equal stresses are formed around the circumference of the outer ring of the bearing [0005]
    • SUMMARY OF THE INVENTION
  • The task of the invention is to create a device for axial attachment of the type cited above which does not cause any deformation of the roller bearing even when the seating conditions are not uniform. [0006]
  • The task is accomplished in that the axial height of the wedging surface of the ring-shaped die is adapted to the circumference of the housing material in cases where the degree to which this material projects varies around the circumference. In other words, the die face configuration is selectively varied around its circumference so that the material displaced to form the bead is generally the same around the circumference and thus generally uniform. Equal stresses are produced which prevents undesirable distortion of the outer ring during the edge forming process. [0007]
  • As a result of the adaptation of the ring-shaped die, this die is seated uniformly around the circumference of the material to be deformed even before the deformation occurs. As a result, there are no sections of material which are compressed to a greater extent than any other areas. Equal radial forces thus act advantageously at every point around the circumference on the outer ring to be attached. [0008]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • These and other objects of the present invention and various features and details of the operation and construction thereof are hereinafter more fully set forth with reference to the accompanying drawings, wherein: [0009]
  • FIG. 1 shows a plan view of a bearing plate with closely adjacent seating surfaces for roller bearings; [0010]
  • FIG. 2 shows a cross section along line A-A of FIG. 1 with the roller bearings installed; [0011]
  • FIG. 3 shows a cross-sectional profile along line B-B of FIG. 1; [0012]
  • FIG. 4 shows a partial longitudinal cross section along line C-C of FIG. 1; [0013]
  • FIG. 5 shows a partial longitudinal cross section along line D-D of FIG. 1; [0014]
  • FIG. 6 shows the contact line between the ring-shaped die and the material to be wedged in a developed view extending between cross sections C and D of FIG. 1; [0015]
  • FIG. 7 is a perspective view of the ring-shaped die for the method of the present invention; and [0016]
  • FIG. 8 is a sectional view of FIG. 7 taken on lines E-E. [0017]
    • DESCRIPTION OF THE METHOD AND SYSTEM
  • Referring now to the drawings and particularly to FIG. 1 thereof, the bearing plate shown in the figures is produced by deep-drawing a flat blank. The steel sheet blank is first drawn into its external shape and then drawn again to produce the holes in the centers of the roller bearing seats. [0018]
  • Because [0019] outer rings 1 are nearly touching, there is no longer any more material present in the area between their lateral surfaces 2 at the narrowest point. What remains is merely a section of web 3 in area 4 of the bearing plate, which is still flat, as can be seen in FIG. 2. Proceeding from this weakest point, however, the axial width increases continuously until it reaches the full width of deep-drawn, shell-shaped section 5, as can be seen in FIG. 2. As a result, arched or folded transition regions 6 of great rigidity are obtained, which keep seating surfaces 7, which are interrupted at the weakest point, dimensionally stable.
  • As a result of circular, [0020] cutaway areas 8 in outer rings 1, web section 3 can be wider, which increases the dimensional stability. Cutaway area 8 also accepts a flange-shaped edge section 9 of shell-like section 5. This flange- like section forms axial contact surfaces 10 for the associated outer rings 1.
  • Corresponding [0021] cutaway areas 8 on the other side of outer rings 1 allow parts 11 of the material of the bearing plate to be pushed in to define a rib 1 la engaging in a circumferential groove G in the outer ring and produce a positive, form-locking attachment of outer rings 1.
  • It has been found that as a result of the special deep-drawing process with web section [0022] 3 described above, the relationships which are obtained in the transition region from the flat blank to cylindrical seating surfaces 7 differ around the circumference. For example, on the left semi-circle extending between plane 12-12, the shaped radius R is uniform (see FIG. 4). As the circle proceeds from plane 12-12 toward web section 3, however, the radius designated Rs becomes smaller, and the volume of projecting material becomes larger (see FIG. 5). To avoid differences in the degree to which the material to be deformed is compressed in individual areas and to produce generally uniform circumferential stresses from the die on the outer ring 1, the axial height of wedging surface 13 of ring-shaped die 14 is adapted to the height of the material before the wedging operation. More specifically, the axial height of the die is varied around the circumference and is a greater depth or height Hg in the semi-circle right of the plane 12-12 than the height Hs in the semicircle left of the plane 12-12. In this phase, therefore, ring- shaped die 14 lies uniformly on the material to be deformed all the way around, except in the material-free area near web section 3. This can be seen in the partial developed view shown to FIG. 6. Whereas the wedging surface 13 overlying left of the plane 12-12 extends in a radial plane, the height of the wedging surface 13 in the semi-circle overlying the right side of plane 12-12 decreases continuously in order to adapt to the height of the material.
  • As a result, the material is subjected to generally the same degree of compression all the way around, and thus the volumes which are deformed are nearly the same around the entire circumference. These volumes thus exert uniform radial loads on the outer ring and thus clamp it uniformly in place. [0023]
  • This is shown in FIG. 5, where the radius Rs of the edge is small and thus more material projects. In this case, therefore, wedging [0024] surface 13 is set higher than in FIG. 4, where the radius R of the edge is larger and less material projects. Since less material projects, wedging surface 13 is laid or set lower. In both cases, approximately the same volume 11 of material is deformed from 15 to 16, as a result of which it can be expected secondarily that the degree to which the material is compressed will be the same in these areas.
  • Even though a particular embodiment of the invention has been illustrated and described herein, it is not intended to limit the invention and changes and modifications may be made therein within the scope of the following claims for example. [0025]

Claims (2)

What is claimed is:
1. A method for securing the outer ring of the bearing in a runner shell wherein the radius of an edge defining the seat for the bearing varies in a predetermined manner around its circumference, the steps comprising;
positioning an outer ring of the bearing in the seat of the runner shell so that the edge of the runner shell overlies a circumferentially extending seating groove in the outer ring;
placing a die having a forming face in engagement with the peripheral edge of the runner shell; and
deforming by means of a die, the edge of the runner shell seat in a manner to displace essentially the same material around the circumference of the edge into the bearing groove, thereby producing a generally uniform force on the bearing ring around the circumference of the ring which eliminates distortion thereof.
2. A method as claimed in
claim 1
, wherein the deformation is carried out by a die having a deformation face which does not lie in a common plane.
US09/313,597 1998-05-19 1999-05-18 Device for axial attachment Expired - Lifetime US6279231B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29809031U 1998-05-19
DE29809031U DE29809031U1 (en) 1998-05-19 1998-05-19 Axial fastening device
DE29809031.7 1998-05-19

Publications (2)

Publication Number Publication Date
US6279231B1 US6279231B1 (en) 2001-08-28
US20010018803A1 true US20010018803A1 (en) 2001-09-06

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US09/313,597 Expired - Lifetime US6279231B1 (en) 1998-05-19 1999-05-18 Device for axial attachment

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US (1) US6279231B1 (en)
JP (1) JP4339443B2 (en)
DE (1) DE29809031U1 (en)

Cited By (1)

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US20110222809A1 (en) * 2008-09-09 2011-09-15 Ab Skf Bearing Support

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DE19935469A1 (en) 1999-07-28 2000-05-11 Skf Gmbh Method for fixing at least one bearing in bearing endshield with recess for reception of bearing
DE19937396C2 (en) * 1999-08-07 2003-06-12 Kugelfischer G Schaefer & Co Mounting device for several rolling bearings
DE10001575C2 (en) * 2000-01-15 2003-01-02 Skf Gmbh Method for fixing at least one bearing in a bearing seat
DE10007437B4 (en) * 2000-02-18 2016-07-07 Skf Gmbh Method for fixing at least one bearing in a bearing receptacle and bearing assembly produced therewith
JP2002213468A (en) * 2001-01-19 2002-07-31 Minebea Co Ltd Bearing fixing method
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DE102004003662B3 (en) * 2004-01-24 2005-04-21 Aktiebolaget Skf Housing with inner and outer races for ball bearing has mounting ring fitted onto profiled outer surface of outer race and welded into central opening of triangular flange
DE102004007570B4 (en) * 2004-02-17 2007-11-15 Ab Skf end shield
DE102004031830B4 (en) * 2004-07-01 2012-06-21 Ab Skf Method for producing a bearing arrangement
DE102004056929B4 (en) * 2004-11-25 2014-11-27 Schaeffler Technologies Gmbh & Co. Kg Method for producing a storage unit
DE102006031525B4 (en) * 2006-07-07 2008-04-17 Ab Skf bearing seat
US8091240B2 (en) * 2007-07-04 2012-01-10 Nsk Ltd. Assembling method of bearing unit
DE102008038050B4 (en) * 2008-08-16 2016-09-22 Ab Skf bearing arrangement
DE102008045495B3 (en) * 2008-09-03 2010-04-29 Ab Skf bearing bracket
DE102008045464B8 (en) * 2008-09-03 2010-06-10 Ab Skf bearing arrangement
DE102009018473A1 (en) 2009-04-22 2010-11-11 Aktiebolaget Skf Component for fixing two bearings e.g. roller bearings, in bearing shield, has base made of flexible material, element made of metal with smaller elasticity than that of base, and contact areas formed to outer circumference of bearings
EP2957786B1 (en) * 2014-06-20 2019-01-02 Aktiebolaget SKF Pair of radial flanged bearings having rolling bodies
DE102016223009A1 (en) * 2016-11-22 2018-05-24 Robert Bosch Gmbh Bearing device, and electrical machine including such a storage device and manufacturing method of such a storage device

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DE29809031U1 (en) 1998-09-24
US6279231B1 (en) 2001-08-28
JPH11336777A (en) 1999-12-07
JP4339443B2 (en) 2009-10-07

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