DE2400902A1 - DEVICE PART WITH A HOLE TO ACCEPT THE OUTER RING OF A ROLLER BEARING - Google Patents
DEVICE PART WITH A HOLE TO ACCEPT THE OUTER RING OF A ROLLER BEARINGInfo
- Publication number
- DE2400902A1 DE2400902A1 DE2400902A DE2400902A DE2400902A1 DE 2400902 A1 DE2400902 A1 DE 2400902A1 DE 2400902 A DE2400902 A DE 2400902A DE 2400902 A DE2400902 A DE 2400902A DE 2400902 A1 DE2400902 A1 DE 2400902A1
- Authority
- DE
- Germany
- Prior art keywords
- device part
- outer ring
- expansion
- coefficient
- ring
- 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
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D33/00—Rotary fluid couplings or clutches of the hydrokinetic type
- F16D33/18—Details
-
- 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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
-
- 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
- F16C2202/00—Solid materials defined by their properties
- F16C2202/20—Thermal properties
- F16C2202/22—Coefficient of expansion
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
- Rolling Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Description
KL Ö CKNER- W ERK E, Aktiengesellschaft,KL Ö CKNER- W ERK E, stock corporation,
DuisburgDuisburg
Vorrichtungsteil mit einer Bohrung zur Aufnahme §J^QJ. eines Wälzlagers Device part with a hole for receiving §J ^ QJ. a rolling bearing
Die Erfindung betrifft Vorrichtungsteile mit einer Bohrung zur Aufnahme des Außenringes eines Wälzlagers, wobei der Ausdehnungskoeffizient des Vorrichtungsteiles größer ist als der Ausdehnungskoeffizient des Außenringes.The invention relates to device parts with a Bore for receiving the outer ring of a roller bearing, the expansion coefficient of the device part is greater than the expansion coefficient of the outer ring.
Das Material für die Lager und für die sie aufnehmenden Vorrichtungsteile, wie z.B. Gehäuseteile und dergleichen weisen unterschiedliche Ausdehnungskoeffizienten auf. Da im allgemeinen die Betriebstemperaturen nicht konstant bleiben und großen Schwankungen unterworfen sind, treten vor allem dann Schwierigkeiten bezüglich des Sitzes der Wälzlager auf, falls das Material der Vorrichtungsteile einen höheren Ausdehnungskoeffizienten als dasjenige der Außenringe hat. Derartige große Temperaturschwankungen treten beispielsweise bei hydraulischen Kupplungen (Föttinger-Kupplungen) auf, die Betriebstemperaturen zwischen +20 C und I50 C ausgesetzt sind. Da ihre Gehäuse aus Aluminium bestehen und für die Außenringe der Wälzlager Stahl verwendet wird, dessen Ausdehnungskoeffizient nur halb so groß ist wie der von Aluminium, kommt es vielfach je nach Wahl der Passungspaarung zu einem Lossitz des Außenringes im Gehäuse bei höherer Temperatur.The material for the bearings and for the device parts that hold them, such as housing parts and the like have different expansion coefficients. As in general the operating temperatures do not remain constant and are subject to great fluctuations, difficulties arise in particular with respect to the seat of the rolling bearings, if the material of the device parts is higher Has expansion coefficients than that of the outer rings. Such large temperature fluctuations occur, for example, with hydraulic clutches (Föttinger clutches), the operating temperatures between +20 C and 150 C. Because their housings are made of aluminum and for the outer rings the roller bearing is made of steel whose coefficient of expansion is only half that of Aluminum, depending on the choice of fit pairing, the outer ring in the Housing at higher temperature.
Es ist bekannt, diese Nachteile dadurch zu- vermeiden, daß in das Gehäuse Stahl- oder Graugußbüchsen zur Aufnahme des Außenringes eingegossen werden.It is known that these disadvantages can be avoided by inserting steel or gray cast iron sleeves into the housing cast in to accommodate the outer ring.
509829/0113509829/0113
Nachteilig ist der sehr hohe Kostenaufwand, so daß man diese Lösung nur in Spezialfallen vorsieht.The disadvantage is the very high cost, so that this solution is only provided in special cases.
Es ist auch bekannt, den Außenring mit einem gewellten Federstahlring zu umgeben und hierdurch eine elastische Verbindung mit dem Gehäuse zu erzielen. In der Praxis zeigte es sich jedoch, daß unzulässige polygonartige Verformungen des Lageraußenringes auftreten, die zu Rundlaufungenauigkeiten führen.It is also known to surround the outer ring with a corrugated spring steel ring and thereby to achieve an elastic connection with the housing. In practice, however, it turned out that Inadmissible polygonal deformations of the bearing outer ring occur, which lead to inaccuracies in concentricity to lead.
Der Erfindung liegt die Aufgabe zugrunde, bei Vorrichtungsteilen, deren Ausdehnungskoeffizienten größer sind als die Ausdehnungskoeffizienten der Außenringe von Wälzlagern eine festsitzende Einpassung des Außenringes unabhängig von den Betriebstemepraturen zu erzielen. Derartige Vorrichtungsteile bestehen beispielsweise aus Aluminium, Polyamid usw.The invention is based on the problem of device parts, their coefficients of expansion a tight fit are greater than the expansion coefficients of the outer rings of rolling bearings of the outer ring regardless of the operating temperatures to achieve. Such device parts consist, for example, of aluminum or polyamide etc.
Diese Aufgabe wird erfindungsgemäß gelöst durch einen in der Bohrung angeordneten Ringkörper/dessen Ausdehnungskoeffizient größer ist als die Ausdehnungskoeffizienten des Vorrichtungsteiles und des Außenringes. Durch diese Maßnahme wird erreicht, daß bei steigender Temperatur der Ringkörper sich stärker ausdehnt als der Außenring und das ihn aufnehmende Vorrichtungsteil. Hierdurch wird von ihm bei höheren Temperaturen eine starke Pressung sowohl auf den Außenring als auch auf das Vorrichtungsteil ausgeübt, so daß der Außenring unverrückbar festgehalten wird und ein Lossitz nicht mehr möglich ist.According to the invention, this object is achieved by an annular body arranged in the bore Expansion coefficient is greater than the expansion coefficient of the device part and the Outer ring. By this measure it is achieved that when the temperature rises the ring body expands more than the outer ring and the device part receiving it. This becomes of him at higher temperatures a strong pressure on both the outer ring and the device part exercised so that the outer ring is held immovably and no more loose fit is possible.
509-829/0113- 3 -509-829 / 0113-3 -
_ 3 —_ 3 -
Um ein axiales "Verschieben des Ringkörpers zu vermeiden kann erfindungsgemäß die Innenwandung der Bohrung eine umlaufende Ausnehmung für seine Aufnahme aufweisen.In order to avoid an "axial displacement" of the ring body can according to the invention the inner wall of the Bore have a circumferential recess for its inclusion.
In vorteilhafter Weiterführung wird die Dicke des Ringkörpers gemäßIn an advantageous further development, the thickness of the ring body is according to FIG
(D-d) . < 1Zt (D+d) (V -X7 ) d 2 3 1(Dd). < 1 Zt (D + d) (V -X 7 ) d 2 3 1
mit D = Durchmesser der Bohrung, fallswith D = diameter of the hole, if
der Ringkörper der Innenwandung der Bohrung anliegt bzw. = Durchmesser der Ausnehmung falls die Bohrung eine solche aufweist,the ring body rests against the inner wall of the bore or = diameter the recess if the hole has one,
d = Außendurchmesser des Außenringes,d = outer diameter of the outer ring,
>S, = Ausdehnungskoeffizient des Außenringes, > S, = coefficient of expansion of the outer ring,
Xp = Ausdehnungskoeffizient des Ringkörpers ,Xp = coefficient of expansion of the ring body ,
•X-, = Ausdehnungskoeffizient des Vor- ^ richtungsteiles• X-, = coefficient of expansion of the ^ directional part
so bestimmt, daß bei steigender Temperatur die radiale Vorspannung des Außenringes konstant bleibt oder höchstens' größer wird. Durch diese Bemessungsregel können die Abmessungen des Ringkörpers optimal bestimmt werden.determined in such a way that the radial preload of the outer ring remains constant as the temperature rises or at most 'becomes larger. This dimensioning rule allows the dimensions of the ring body to be optimal to be determined.
In vorteilhafter Ausgestaltung der Erfindung besteht der Ringkörper aus einem elastischen Material, so daß er zum Einbringen in die Ausnehmung entsprechend elastisch verformt und in die Ausnehmung eingestzt werden kann. Diese Ausführungsform ist vor allem vorteilhaft für Ringkörper -beispielsweiseIn an advantageous embodiment of the invention, the ring body consists of an elastic material, so that it is correspondingly elastically deformed for introduction into the recess and into the recess can be used. This embodiment is particularly advantageous for ring bodies, for example
509829/0113509829/0113
aus Butadien-Kautschuk mit einem Ausdehnungskoeffizienten von _6Made of butadiene rubber with an expansion coefficient of _6
12Ox 10 , Silicon-Kautschuk mit einem12Ox 10, silicone rubber with a
Ausdehnungskoeffizienten von _6Expansion coefficient of _6
185x 10 Fluor- Kautschuk mit einem Ausdehnungskoeffizienten von _6185x 10 fluoro rubber with an expansion coefficient of _6
14-5X 10 .14-5X 10.
Ein besonders einfacher geschlitzter Ringkörper ergibt sich dadurch, daß endloses Bandmaterial in entsprechend lange Abschnitten unterteilt und anschließend zu einem Ringkörper gebogen wird. Als Bandmaterial können auch Kunststoffbänder bzw. Gummibänder mit dem erforderlichen Ausdehnungskoeffizienten verwendet werden, deren Abschnitte nach ihrem Einlegen in die Ausnehmung die Form des geschlitzten Ringkörpers annehmen.A particularly simple slotted ring body results from the fact that endless band material in accordingly long sections are divided and then bent to form an annular body. As tape material Plastic or rubber bands with the required expansion coefficient can also be used are, the sections of which after their insertion into the recess the shape of the slotted ring body accept.
Vorteile und Merkmale werden anhand eines Ausführungsbeispieles in der Fig. 1 erläutert, die einen axialen Schnitt durch ein im Ausschnitt dargestelltes Gehäuse mit einem erfindungsgemäß befestigten Wälzlager zeigt, wobei der Ringkörper in einer Ausnehmung liegt.Advantages and features are explained using an exemplary embodiment in FIG. 1, the one axial section through a housing shown in the cutout with a fixed according to the invention Rolling bearing shows, wherein the ring body lies in a recess.
In der Figur ist mit 1 ein Aluminiumgehäuse im Ausschnitt dargestellt, das eine Bohrung zur Aufnahme des Außenringes 3 eines Wälzlagers 4- aufweist. Der Innenring 5 dieses Wälzlagers sitzt in an sich bekannter Weise auf einer durch das Gehäuse geführten teilweise geschnitten dargestellten Welle 6. Mit 7 sind Rollkörper des Wälzlagers dargestellt.In the figure, an aluminum housing is shown in the cutout with 1, which has a hole for receiving of the outer ring 3 of a roller bearing 4-. The inner ring 5 of this roller bearing sits in itself in a known manner on a partially sectioned shaft 6 guided through the housing. With 7 rolling elements of the rolling bearing are shown.
509829/0113_509829 / 0113_
Die Bohrung ihrerseits weist weiterhin eine umlaufende Ausnehmung auf, in die ein Ringkörper 9 Butadien-Kautschuk eingepaßt ist.The bore for its part also has a circumferential recess into which an annular body 9 Butadiene rubber is fitted.
- Ansprüche -- Expectations -
60*8-29/01 13
- 6 - 60 * 8-29 / 01 13
- 6 -
Claims (1)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2400902A DE2400902C2 (en) | 1974-01-09 | 1974-01-09 | Rolling bearing installation |
BE149774A BE821359A (en) | 1974-01-09 | 1974-10-23 | PART OF A DEVICE AND EQUIPPED WITH A BOREHOLE THAT RECEIVES THE OUTER BUSH OF A BEARING |
FR7436459A FR2257041A1 (en) | 1974-01-09 | 1974-10-31 | |
IT29765/74A IT1025954B (en) | 1974-01-09 | 1974-11-25 | MACHINE ELEMENT WITH BORING TO HOLD THE OUTER RING OF A ROLLING BEARING |
PL1974176600A PL92548B1 (en) | 1974-01-09 | 1974-12-18 | |
GB554/75A GB1497151A (en) | 1974-01-09 | 1975-01-07 | Assembly of a rolling bearing in a housing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2400902A DE2400902C2 (en) | 1974-01-09 | 1974-01-09 | Rolling bearing installation |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2400902A1 true DE2400902A1 (en) | 1975-07-17 |
DE2400902C2 DE2400902C2 (en) | 1982-05-27 |
Family
ID=5904435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2400902A Expired DE2400902C2 (en) | 1974-01-09 | 1974-01-09 | Rolling bearing installation |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE821359A (en) |
DE (1) | DE2400902C2 (en) |
FR (1) | FR2257041A1 (en) |
GB (1) | GB1497151A (en) |
IT (1) | IT1025954B (en) |
PL (1) | PL92548B1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708888A1 (en) * | 1997-03-05 | 1998-09-10 | Itt Mfg Enterprises Inc | Bearings, especially for a motor-pump unit |
EP1077106A2 (en) * | 1999-08-16 | 2001-02-21 | Robert Bosch Gmbh | Portable power tool |
EP1080838A2 (en) * | 1999-08-20 | 2001-03-07 | Robert Bosch Gmbh | Portable power tool |
DE102005043945A1 (en) * | 2005-09-15 | 2007-03-22 | Schaeffler Kg | Roller bearing for machine tool spindle has ring with higher coefficient of thermal expansion than outer ring |
DE102005043954A1 (en) * | 2005-09-15 | 2007-03-22 | Schaeffler Kg | Radial roller bearing, especially for machine tool's main spindle, has tension ring which radially constricts running track and consists of material with higher thermal expansion coefficient than material of outer race |
DE102010054828A1 (en) * | 2010-12-16 | 2012-06-21 | Thyssenkrupp Presta Ag | Power steering with spindle drive |
DE102012202900A1 (en) * | 2012-02-27 | 2013-08-29 | Aktiebolaget Skf | Bearing arrangement of electric motor, has rolling bearing including ring element arranged in annular groove of outer bearing ring such that outer diameter of ring element is set based on outer diameter of outer bearing ring |
EP2848834A3 (en) * | 2013-08-01 | 2015-11-18 | Aktiebolaget SKF | Tubular body for mounting on a shaft or a bore and method for mounting same |
WO2015177276A1 (en) * | 2014-05-21 | 2015-11-26 | Aktiebolaget Skf | Bearing assembly |
DE102019104143A1 (en) * | 2019-02-19 | 2020-08-20 | Rolls-Royce Deutschland Ltd & Co Kg | Device, planetary gear with a device and method for producing a rotationally fixed connection between two components |
US10913484B2 (en) | 2016-06-22 | 2021-02-09 | Thyssenkrupp Presta Ag | Ball screw drive of an electromechanical power steering device with deflecting bodies for a ball return |
CN115066565A (en) * | 2019-12-10 | 2022-09-16 | 科氏工程解决方案有限责任公司 | Bearing assembly for rotating electrical machine |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3239334A1 (en) * | 1982-10-23 | 1984-04-26 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Installation of bearings |
DE3239305A1 (en) * | 1982-10-23 | 1984-04-26 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Axial bearing support |
NL8301723A (en) * | 1983-05-13 | 1984-12-03 | Skf Ind Trading & Dev | METHOD FOR CARRYING OUT A CONSTRUCTION THAT DOES NOT INCLUDE FITTING RUST |
US4549823A (en) * | 1984-05-29 | 1985-10-29 | Caterpillar Tractor Co. | Bearing race retention device and method |
DE3836272A1 (en) * | 1988-10-25 | 1990-04-26 | Stihl Maschf Andreas | INTERNAL COMBUSTION ENGINE, ESPECIALLY TWO-STROKE ENGINE FOR HAND-HELD TOOLS, SUCH AS MOTOR CHAIN SAWS OR THE LIKE. |
CA2182923C (en) * | 1995-08-10 | 2006-10-10 | Walter P. Waskiewicz | Bearing assembly insert |
DE19901562A1 (en) * | 1999-01-16 | 2000-07-27 | Mannesmann Vdo Ag | Shaft bearing arrangement with play compensation |
FR2796425B1 (en) * | 1999-07-13 | 2001-10-19 | Aerospatiale Matra Ccr | METHOD OF INTRODUCING A METAL RING INTO A PART OF COMPOSITE MATERIAL WITH ORGANIC MATRIX AND PART OBTAINED BY THIS PROCESS |
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 |
EP2193876B1 (en) * | 2008-12-03 | 2011-09-07 | Franz Kessler GmbH | Motor spindle with a previous fixed bearing |
FR2978219B1 (en) * | 2011-07-22 | 2014-05-16 | Ntn Snr Roulements | MOUNTING A ROTATING SHAFT IN A HOUSING THROUGH A BEARING |
CN103775512B (en) * | 2012-10-26 | 2016-08-03 | 复盛股份有限公司 | Bearing block structure for fluid machinery and preparation method thereof |
EP2840271A3 (en) * | 2013-08-22 | 2015-05-06 | Schaeffler Technologies AG & Co. KG | Bearing arrangement with a retaining ring and method of manufacture |
JP2019049316A (en) * | 2017-09-11 | 2019-03-28 | スズキ株式会社 | Bearing member structure and manufacturing method thereof |
-
1974
- 1974-01-09 DE DE2400902A patent/DE2400902C2/en not_active Expired
- 1974-10-23 BE BE149774A patent/BE821359A/en unknown
- 1974-10-31 FR FR7436459A patent/FR2257041A1/fr not_active Withdrawn
- 1974-11-25 IT IT29765/74A patent/IT1025954B/en active
- 1974-12-18 PL PL1974176600A patent/PL92548B1/pl unknown
-
1975
- 1975-01-07 GB GB554/75A patent/GB1497151A/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19708888A1 (en) * | 1997-03-05 | 1998-09-10 | Itt Mfg Enterprises Inc | Bearings, especially for a motor-pump unit |
EP1077106A2 (en) * | 1999-08-16 | 2001-02-21 | Robert Bosch Gmbh | Portable power tool |
EP1077106A3 (en) * | 1999-08-16 | 2002-06-05 | Robert Bosch Gmbh | Portable power tool |
EP1537948A1 (en) * | 1999-08-16 | 2005-06-08 | Robert Bosch Gmbh | Portable power tool |
EP1080838A2 (en) * | 1999-08-20 | 2001-03-07 | Robert Bosch Gmbh | Portable power tool |
EP1080838A3 (en) * | 1999-08-20 | 2002-06-05 | Robert Bosch Gmbh | Portable power tool |
DE102005043945A1 (en) * | 2005-09-15 | 2007-03-22 | Schaeffler Kg | Roller bearing for machine tool spindle has ring with higher coefficient of thermal expansion than outer ring |
DE102005043954A1 (en) * | 2005-09-15 | 2007-03-22 | Schaeffler Kg | Radial roller bearing, especially for machine tool's main spindle, has tension ring which radially constricts running track and consists of material with higher thermal expansion coefficient than material of outer race |
DE102010054828A1 (en) * | 2010-12-16 | 2012-06-21 | Thyssenkrupp Presta Ag | Power steering with spindle drive |
DE102012202900A1 (en) * | 2012-02-27 | 2013-08-29 | Aktiebolaget Skf | Bearing arrangement of electric motor, has rolling bearing including ring element arranged in annular groove of outer bearing ring such that outer diameter of ring element is set based on outer diameter of outer bearing ring |
EP2848834A3 (en) * | 2013-08-01 | 2015-11-18 | Aktiebolaget SKF | Tubular body for mounting on a shaft or a bore and method for mounting same |
WO2015177276A1 (en) * | 2014-05-21 | 2015-11-26 | Aktiebolaget Skf | Bearing assembly |
US10913484B2 (en) | 2016-06-22 | 2021-02-09 | Thyssenkrupp Presta Ag | Ball screw drive of an electromechanical power steering device with deflecting bodies for a ball return |
DE102019104143A1 (en) * | 2019-02-19 | 2020-08-20 | Rolls-Royce Deutschland Ltd & Co Kg | Device, planetary gear with a device and method for producing a rotationally fixed connection between two components |
CN115066565A (en) * | 2019-12-10 | 2022-09-16 | 科氏工程解决方案有限责任公司 | Bearing assembly for rotating electrical machine |
Also Published As
Publication number | Publication date |
---|---|
DE2400902C2 (en) | 1982-05-27 |
BE821359A (en) | 1975-02-17 |
FR2257041A1 (en) | 1975-08-01 |
PL92548B1 (en) | 1977-04-30 |
GB1497151A (en) | 1978-01-05 |
IT1025954B (en) | 1978-08-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OGA | New person/name/address of the applicant | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8330 | Complete disclaimer |