CN105008740B - Bearing arrangement - Google Patents

Bearing arrangement Download PDF

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Publication number
CN105008740B
CN105008740B CN201380067902.0A CN201380067902A CN105008740B CN 105008740 B CN105008740 B CN 105008740B CN 201380067902 A CN201380067902 A CN 201380067902A CN 105008740 B CN105008740 B CN 105008740B
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CN
China
Prior art keywords
bearing
rib
bearing arrangement
inner ring
race
Prior art date
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Active
Application number
CN201380067902.0A
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Chinese (zh)
Other versions
CN105008740A (en
Inventor
P.卡察罗斯
R.斯皮斯
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SKF AB
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SKF AB
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Publication of CN105008740A publication Critical patent/CN105008740A/en
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Publication of CN105008740B publication Critical patent/CN105008740B/en
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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
    • 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
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • F16C33/605—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage
    • 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
    • F16C41/001—Integrated brakes or clutches for stopping or coupling the relatively movable 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
    • 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
    • F16C19/36—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 a single row of rollers
    • F16C19/364—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 a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • 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
    • F16C2223/18—Hardening, e.g. carburizing, carbo-nitriding with induction hardening
    • 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
    • F16C2229/00—Setting preload

Landscapes

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

Abstract

The present invention relates to a kind of bearing arrangement (1), it includes two and is respectively provided with inner ring (4, and outer ring (6 5), 7) rolling bearing (2,3) of the rolling element (8,9) and between bearing race, two of them rolling bearing is pre-tightened by inner ring and/or the Relative sliding of outer ring along axial (a), rib (10,11) wherein are set on inner ring and/or outer ring, the rib constitutes the backstop of rolling bearing.In order to the simple and accurately preload in adjusting bearing arrangement, present invention provide that, the opposite bearing race for supporting it of at least one rib in multiple ribs is arranged on bearing race axially translatablely.

Description

Bearing arrangement
The present invention relates to a kind of bearing arrangements comprising two are respectively provided with inner ring and outer ring and between bearing race The rolling bearing of rolling element, two of them rolling bearing are pre-tightened by the Relative sliding of inner ring and/or outer ring along axial direction, wherein Rib is set on inner ring and/or outer ring, and the rib constitutes the axial stop of rolling element.
Such bearing arrangement is usually designed as tapered roller bearing device.The circular cone of two of them compound action rolls Sub- bearing axially relatively pre-tightens.The adjusting pre-tightened in tapered roller bearing is opposite expends and inaccurate process.People Attempt to be axially towards one another by two inner rings of tapered roller bearing unit (in the case where O shape bearing arrangement) mobile or edge Axially be located remotely from each other it is mobile (in the case where X-shaped bearing arrangement), be arranged and correctly pre-tighten.Correctly sliding distance by pair The measurement that component expends is determining and is adjusted in this way by adjusting washer (disk), so that forming desired preload, that is, in tightening axle spiral shell After mother, entire bearing arrangement can be fixed in shaft member by the axis nut.
It because the locking of nut is realized by corresponding clamping force, must tolerate again, expend ground and pass through tune Save the bearing pre-tightened that washer is adjusted is influenced by usually very big clamping force.Therefore the preload being just expected to is only capable of being difficult ground in fact It is existing.
Technical problem to be solved by the present invention lies in improve the bearing arrangement of aforementioned forms, so that bearing arrangement in this way In pretightning force can be simpler and more accurately be conditioned.
The technical problem is characterized in that at least one of multiple ribs are opposite to be propped up through the solution of the invention The bearing race edge for holding the rib is axially adjustably arranged on bearing race.
Adjustable rib and bearing race are preferably equipped with screw thread herein, are especially equipped with fine thread, therefore rib passes through Rotation can be mobile with axially opposed bearing race or be adjusted.
Two rolling bearings are preferably tapered roller bearing.Rib is preferably provided on the inner ring of two rolling bearings.
Moveable rib can have cylindrical mating surface, using relative between the corresponding matching face on bearing race Gap cooperation is given the margin of tolerance；The clearance fit is preferably implemented closely herein.
Moveable rib and the bearing race for supporting it can have device, axially can not by the device rib edge Movably it is fixed on bearing race.Therefore it is possible that first accurately adjust bearing arrangement preload and then fixation can Mobile rib, for for good and all keeping the preload being conditioned.
Preferred form of implementation according to the invention includes at least one edge for axial immovably fixed device Axially extending slot is added at least one section of the mating surface for moveable rib of the slot in bearing race Work.Moveable rib has the axial end region of the quenching towards rolling element and herein backwards to the unhardened of rolling element Axial end region (it is in order to which fixed purpose is designed for plastic deformation).
The axial end region of the quenching of the cylindrical mating surface or rib of rib preferably uses impewdance matching herein.
The special form of implementation of one kind of the invention is, moveable rib and driving element, especially with motor (servo Motor) it is connected, rib can be rotated by it relative to bearing race.It is possible that can be controlled in the operation of bearing arrangement System or calibration pre-tighten.
The technical solution of the recommendation of bearing arrangement also allows to adjust bearing list simply by sliding axially for guide lip The preload of member, especially tapered roller bearing unit.
Technical solution according to the invention also resides in, two Clamping Circuits — that is, one be the Clamping Circuit that roller pre-tightens and One is that the Clamping Circuit-that inner ring clamps is separated from each other.In this way, inner ring clamp or nut locking negative effect with it is actual Bearing pre-tightened separation.
By the way that the guide lip of a bearing of bearing unit to be designed as to move axially, above-mentioned point may be implemented From.The parts of bearings " guide lip ring " formed in this way can be equipped with screw thread, therefore axial slide and realization in turn may be implemented Rolling element pre-tightens.
Because guide lip ring should preferably have for the hard contact area of roller guide and lead to for rib ring The region for being plastically deformed the plastically deformable of fixed on bearing race (rib is locked on bearing race) is crossed, it is sensed herein to quench The contact area of fire is preferred.Region on the end of screw thread should be designed as plastically deformable, therefore it can lead to It crosses in the axial groove being arranged thus that hammering is knocked on bearing inner race.But removable locking of the rib ring on bearing race Or fixed other forms are certainly possible to.
The accurate adjusting pre-tightened advantageously reduces bearing wear.
The embodiment of the present invention is shown in the accompanying drawings.In the accompanying drawings:
Fig. 1 shows the radial segment of bearing arrangement comprising two opposite tapered roller bearings clamped,
Fig. 2 shows the details " Z " of the bearing arrangement according to Fig. 1 in form of implementation of the invention alternative and
Fig. 3 shows the alternative moulding of the bearing arrangement according to Fig. 1 with radial segment.
Bearing arrangement 1 is shown in FIG. 1, there are two tapered roller bearings 2 and 3 for tool.Two 2,3 points of tapered roller bearing It Ju You not an inner ring 4 or 5 and outer ring 6 or 7.Rolling element 8 or 9 is set between bearing race.
Shown bearing arrangement is laid out with O shape to be implemented.Rib 10 and 11 on bearing inner race 4,5 limits taper roller 8,9 edges The motility of axial a.
When the rib 11 of inner ring 5 classically forms on inner ring 5 as fixed rib, the rib 10 on inner ring 4 is but It is not in this way.The rib is designed as removable rib, that is, it can be conditioned on inner ring 4 along axial direction.
Annular rib 10 has screw thread 12 thus, this is as bearing inner race 4, that is, rib 10 can be screwed in inner ring On 4.For this, if rib 10 is rotated, due to screw thread 12, it can be mobile with axially opposed inner ring 4.
This possibility is formed accordingly, by screwing adjustable rib 10 in this way after installing the bearing arrangement 1 It far is moved axially on inner ring 4, so that forming desired preload on bearing arrangement.This can have been screwed in axis nut 19 And it is just carried out at the time of being fixed on axis 21, that is, when bearing inner race 4,5 is fixedly mounted on axis 21.Therefore it can carry out Independently of the adjusting of the preload of installation and fixation of the bearing inner race 4,5 on axis 21.
By rotating adjustable adjustable desired preload of rib 10, this can be advantageously independent of as described The fastening of axis nut 19 carries out.If reaching desired final position of the rib 10 on inner ring 4, rib can pass through device 15 is fixed, rib 10 can be axially fixed on inner ring 4 by it.Bolt is shown in FIG. 1, when rib 10 should be in inner ring When being fixed on 4, it is radially directed and is tightened.
This alternatives are shown specifically in Fig. 2.Adjustable rib 10 herein again be equipped with screw thread 12, this with As bearing inner race 4.Rib 10 can screw on inner ring 4 accordingly, and thus it can be moved along axial a relative to inner ring 4.
The slot 16 that also on circumferential position there is at least one to extend along axis a in inner ring 4 in addition to screw thread 12.
Adjustable rib 10 has cylindrical mating surface 13, matches with the corresponding matching face 14 of the periphery of inner ring 4. There are the very close clearance fits of tolerance between mating surface 13 and corresponding matching face 14.
It is quenched in the axial end region 17 (this is as cylindrical mating surface 13) towards rolling element 8 of rib 10 by induction When fiery, then (hardening) is not quenched backwards to the axial end region 18 of rolling element 8.
This provides a possibility that such, for example by hammer in unhardened end after desired preload is conditioned It is tapped on region 18.Unhardened material can be plastically deformed easily in the section of rib 10 and stick on slot 16 In.Therefore rib continuing to rotate and be no longer possible and rib 10 is fixed on inner ring 4 with respect to inner ring 4.
The alternatives of Fig. 1 are shown in FIG. 3.First it is worth noting that, in this two tapered roller bearing 2,3 Bearing outer ring 6,7 integral types constitute.Two bearing inner races 4,5 are clamped by clamp ring or check ring 20 along axial, therefore Form bearing unit.
The Clamping Circuit A and B drawn in Fig. 3 is separated from each other, it is thus possible to, inner ring 4 and 5 is clamped first, this is logical Cross the progress of tightening axle nut 19.This is carried out by common and required high-clamping force.Followed by adjustable rib 10 (guide lip ring) highly precisely adjusts real bearing pre-tightened and screw thread 12 (namely screw-nut-device) is consolidated It is fixed.
The power pre-tightened for realizing desired roller guided by adjustable rib 10 is mostly than for clamping inner ring Power needed for 4,5 is small by 10%.This realizes a kind of special form of implementation of the invention: according to what is mentioned here, especially larger Bearing unit in for example by servo motor according to operating status (initiatively) in this way along be adjusted axially be equipped with screw thread 12 gear Side 10, so that generating ideal pre-tighten always in bearing unit.
By Fig. 3 it can also be seen that following characteristics: two inner rings 4 and 5 are clamped by check ring 20 herein as has been described, Therefore bearing unit is formed, such as in the form of truck hub unit.It can simply be adjusted by moveable rib 10 herein Desired preload is saved, so that the vibration being likely to occur in the transportational process of bearing arrangement not will lead to since " roller shock " is led Cause raceway injury.
List of numerals
1 bearing arrangement
2 rolling bearings
3 rolling bearings
4 inner rings
5 inner rings
6 outer rings
7 outer rings
8 rolling elements
9 rolling elements
10 adjustable ribs
11 fixed ribs
12 screw threads
13 cylindrical mating surfaces
14 corresponding matching faces
15 are used for the device of axial restraint
16 slots
The axial end region of 17 hardening
18 unhardened axial end regions
19 axis nuts
20 check rings
21 axis
A is axial
A Clamping Circuit
B Clamping Circuit

Claims (9)

1. a kind of bearing arrangement (1) comprising two are respectively provided with inner ring (4,5) and outer ring (6,7) and between bearing race Rolling element (8,9) rolling bearing (2,3), two of them rolling bearing (2,3) pass through inner ring (4,5) and/or outer ring (6,7) Relative sliding pre-tightened along axial (a), it is described wherein rib (10,11) are arranged on inner ring (4,5) and/or outer ring (6,7) Rib constitutes the backstop of rolling element (8,9), so that the pretightning force in bearing arrangement can be adjusted, which is characterized in that multiple gears The opposite bearing race (4) for supporting it of at least one rib (10) in side is movably disposed at the bearing race (4) along axial direction (a) On, the moveable rib (10) has cylindrical mating surface (13), relative to the corresponding matching on the bearing race (4) The clearance fit in face is given the close margin of tolerance.
2. bearing arrangement described in accordance with the claim 1, which is characterized in that the moveable rib (10) and the bearing It encloses (4) and is equipped with screw thread (12), therefore the rib (10) is removable along axial direction (a) by rotating opposite bearing race (4).
3. bearing arrangement according to claim 1 or 2, which is characterized in that described two rolling bearings (2,3) are circular cone rollings Sub- bearing.
4. bearing arrangement according to claim 1 or 2, which is characterized in that the rib (10,11) setting inner ring (4, 5) on.
5. bearing arrangement according to claim 1 or 2, which is characterized in that the moveable rib (10) and bearing Its bearing race (4) has device (15), and rib (10) is non-removably secured to bearing race (4) along axial direction by the device On.
6. bearing arrangement according to claim 5, which is characterized in that described for axial immovably fixed device It (15) include at least one slot (16) along axial direction (a) extension, the slot is used for moveable rib in bearing race (4) (10) it is processed at least one section of mating surface.
7. bearing arrangement according to claim 5, which is characterized in that the moveable rib (10) has towards rolling The axial end region (17) of the quenching of body (8) and the backwards unhardened axial end region (18) of rolling element (8).
8. bearing arrangement according to claim 7, which is characterized in that the cylindrical mating surface (13) of the rib (10) And/or the axial end region (17) of the quenching of rib (10) uses impewdance matching.
9. bearing arrangement according to claim 2, which is characterized in that the moveable rib (10) and driving element phase Even, rib (10) can be rotated by it relative to bearing race (4).
CN201380067902.0A 2012-11-22 2013-11-14 Bearing arrangement Active CN105008740B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012221297.3A DE102012221297B4 (en) 2012-11-22 2012-11-22 Bearing arrangement
DE102012221297.3 2012-11-22
PCT/EP2013/073785 WO2014079762A1 (en) 2012-11-22 2013-11-14 Bearing arrangement

Publications (2)

Publication Number Publication Date
CN105008740A CN105008740A (en) 2015-10-28
CN105008740B true CN105008740B (en) 2019-05-03

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ID=49596280

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201380067902.0A Active CN105008740B (en) 2012-11-22 2013-11-14 Bearing arrangement

Country Status (3)

Country Link
CN (1) CN105008740B (en)
DE (1) DE102012221297B4 (en)
WO (1) WO2014079762A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102014214999B4 (en) 2014-07-30 2021-06-24 Aktiebolaget Skf Bearing arrangement with preload
DE102015205748B4 (en) 2015-03-31 2020-10-08 Aktiebolaget Skf Bearing arrangement with preload
DE102015205745A1 (en) 2015-03-31 2016-10-06 Aktiebolaget Skf bearing arrangement
DE102015212311A1 (en) 2015-07-01 2017-01-05 Aktiebolaget Skf bearing arrangement
DE102015218862B4 (en) 2015-09-30 2023-03-16 Aktiebolaget Skf bearing arrangement
DE102015218863A1 (en) 2015-09-30 2017-03-30 Aktiebolaget Skf bearing arrangement
DE102015220962B4 (en) 2015-10-27 2022-06-30 Aktiebolaget Skf Bearing arrangement with preload
CN106224394B (en) * 2016-09-06 2019-04-02 沃德传动（天津）股份有限公司 A kind of pre-tightening apparatus of bearing assembly and bearing
CN107725635A (en) * 2017-09-04 2018-02-23 宁夏共享机床辅机有限公司 A kind of mechanical overload protection device and unidirectional delivery torque protection device
DE102018204313A1 (en) * 2018-03-21 2019-09-26 Carl Zeiss Industrielle Messtechnik Gmbh Rolling bearings for rotary swivel joints
CN110145540A (en) * 2019-06-26 2019-08-20 大连光扬轴承制造有限公司 One kind, which can float, adjusts double row tapered roller bearing and adjusting method
CN110966302A (en) * 2019-12-27 2020-04-07 慈兴集团有限公司 Double-row angular contact bearing with different axial bearing capacities
CN112713726B (en) * 2020-12-25 2022-11-29 中车永济电机有限公司 Traction motor bearing transportation protection tool with shaft extension

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DE3740805C2 (en) 1986-12-18 1995-08-17 Skf Gmbh Multi-ring bearing consisting of at least two radially arranged roller bearings
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Publication number Priority date Publication date Assignee Title
CN101668957A (en) * 2007-04-27 2010-03-10 谢夫勒两合公司 Rolling bearing and bearing means with rolling bearing

Also Published As

Publication number Publication date
DE102012221297B4 (en) 2020-07-02
CN105008740A (en) 2015-10-28
DE102012221297A1 (en) 2014-05-22
WO2014079762A1 (en) 2014-05-30

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