WO2022228603A1 - Combined radial/axial bearing unit with components produced by forming - Google Patents

Combined radial/axial bearing unit with components produced by forming Download PDF

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Publication number
WO2022228603A1
WO2022228603A1 PCT/DE2022/100226 DE2022100226W WO2022228603A1 WO 2022228603 A1 WO2022228603 A1 WO 2022228603A1 DE 2022100226 W DE2022100226 W DE 2022100226W WO 2022228603 A1 WO2022228603 A1 WO 2022228603A1
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WO
WIPO (PCT)
Prior art keywords
radial
axial
bearing
area
axial bearing
Prior art date
Application number
PCT/DE2022/100226
Other languages
German (de)
French (fr)
Inventor
Wolfgang Fugel
Tanja Weissbrodt
Original Assignee
Schaeffler Technologies AG & Co. KG
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Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2022228603A1 publication Critical patent/WO2022228603A1/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
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • 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
    • F16C19/381—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 at least one row for radial load in combination with at least one row for axial load
    • 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
    • F16C19/44—Needle bearings
    • F16C19/48—Needle bearings with two or more rows of needles
    • 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
    • F16C33/588—Races of sheet metal
    • 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
    • F16C2220/00—Shaping
    • F16C2220/40—Shaping by deformation without removing material
    • F16C2220/42—Shaping by deformation without removing material by working of thin-walled material such as sheet or tube
    • 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
    • F16C2220/00—Shaping
    • F16C2220/80—Shaping by separating parts, e.g. by severing, cracking
    • F16C2220/84—Shaping by separating parts, e.g. by severing, cracking by perforating; by punching; by stamping-out
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings

Definitions

  • the present invention relates to a combined radial/axial bearing unit with components manufactured by molding, in particular a bearing sleeve made from a formed sheet metal material, comprising a hollow-cylindrical radial bearing area with an outer circumferential raceway for rolling elements guided in a radial cage, which form a radial bearing component. Adjacent to this is an axial bearing component.
  • bearing units of interest here are used, for example, in a drive train wherever a shaft is to be supported in both the radial and axial direction, for example in the case of a pinion shaft bearing of an axle differential.
  • the radial bearing component has an inner ring and an outer ring, between which cage-guided rolling elements, here in the form of rollers, are located.
  • the thrust bearing component includes two thrust washers, between which the cage-guided rollers, which are also standard, are arranged.
  • the outer ring of the radial bearing component and the axial disk of the axial bearing component facing it are mechanically coupled to one another and at the same time movable relative to one another to form a prefabricated structural unit. Analog The same is realized between the inner ring of the radial bearing component and the outer thrust washer of the thrust bearing component.
  • a combined radial/axial bearing unit with a bearing sleeve made from a formed sheet metal material has a hollow-cylindrical radial bearing area with an outer circumferential raceway for rolling elements guided in a radial cage and an adjoining disk-shaped axial bearing area with one on one of the two soflä chen arranged raceway for guided in an axial cage includes rolling elements, wherein for axial securing of the radial cage at the end of the axial bearing area measure facing to of the hollow cylindrical radial bearing area is provided a radially outwardly angled edge area to form a self-cohesive unit.
  • the advantage of the solution according to the invention lies in particular in the fact that the functionally integrated, formed bearing sleeve gives the entire assembly rigid stability and the various components can be assembled in a simple manner by first assembling the axial bearing cage with rolling elements, then the axial disk, then the radial bearing cage with rolling elements the hollow-cylindrical area of the bearing sleeve can be slid on, in order finally to bend or bead the distal edge area of the bearing sleeve radially outward. Due to the axial bearing Rich and comprehensive as well as the radial bearing area and provided with respective raceways ver provided one-piece monolithic and single-material bearing sleeve is the technical prerequisite for the easy-to-assemble and self-cohesive assembly formed.
  • a monolithic bearing sleeve is understood to mean a component formed in one piece from a sheet metal material, which includes the function of one of the raceways of the axial bearing area, the function of one of the raceways of the radial bearing area and also the function of an axial lock for the radial cage.
  • the bearing sleeve which is functionally integrated according to the invention, specifies that the two bearing areas are aligned exactly at right angles to one another.
  • the angled edge portion serving this purpose should preferably come to rest directly on the front side of the radial cage.
  • the length of the edge area should correspond at most to the height of the radial cage, and in particular be below the diameter of the rolling element, in order to ensure both a maximum contact surface of the two adjacent components and to additionally protect the end face of the radial cage, which is usually made of plastic, and prevent penetration of dirt from this end face into the radial/thrust bearing unit.
  • the functionally integrated bearing sleeve according to the invention is preferably designed as a stamped and bent part, the radial bearing area of which is produced by deep-drawing, with the raceways being introduced by embossing.
  • the angled edge region preferably has a transition region that is stretched out starting from the hollow cylindrical shape of the radial bearing region, with an adjoining edge region that is bent radially outwards for axial securing.
  • the material thickness in the edge area turns out to be smaller than the material thickness in the area of the raceway of the radial bearing area.
  • the thinner edge area can be bent over or beaded more easily in order to form the desired axial lock.
  • This difference in material thickness can be produced in a simple manner by deep drawing, so that no costly machining steps are required for this. are required.
  • the bearing sleeve according to the invention can thus be manufactured completely as a deep-drawn stamped and bent part.
  • the raceway for the axial bearing area of the bearing sleeve is arranged on the side surface of the axial bearing area facing the radial bearing area, with an inner thrust washer having a corresponding raceway being provided.
  • the inner axial disk forms an axial stop for the radial cage on the inner edge and is held against the bearing sleeve by means of positive locking means, for example by a non-circular contour.
  • other form-fitting anti-rotation devices such as a pinned tongue-groove connection or the like, to provide for this.
  • a functionally coordinated and compact bearing unit with a simple profile can be produced.
  • the raceway for the axial bearing area of the bearing sleeve is arranged on the side surface of the axial bearing area facing away from the radial bearing area, with an outer axial disk being provided with a corresponding raceway.
  • This variant of an external axial disk allows relatively wider raceways for the radial bearing area and, in contrast to the first embodiment discussed above, is longer.
  • the combined radial/axial bearing unit according to the invention can advantageously be implemented with rolling elements which are designed in the radial bearing area and/or axial bearing area in the form of needles for a needle bearing.
  • rolling elements which are designed in the radial bearing area and/or axial bearing area in the form of needles for a needle bearing.
  • FIG. 1 shows a partial longitudinal section through a combined radial/axial bearing unit according to a first embodiment
  • FIG. 2 shows a partial longitudinal section through a combined radial/axial bearing unit according to a second embodiment.
  • the combined radial/thrust bearing unit of the first embodiment comprises a bearing sleeve 1 monolithically produced from a formed sheet metal material, which has a hollow-cylindrical radial bearing area 2 with a raceway 4 stamped on the outside circumferentially for roller bodies 6 guided in a radial bearing cage 5 and a adjoining disk-shaped axial bearing area 3 with an also embossed raceway 7 arranged on one of the two side surfaces for rolling elements 9 guided in an axial cage 8.
  • a peripheral region 10 that is angled radially outward in one piece is provided for axial securing. In this way, a structural unit that holds itself together is formed.
  • the angled edge portion 10 comes to axial locking directly on the face of the dialkarfig Ra 5 to the system and has a length which corresponds approximately to the height of the radial cage.
  • the angled edge area 10 is formed from the cylindrical shape of the radial bearing area 2 via a transition area 11 that is straightened in comparison and forms the bending radius, to the adjoining edge area 10 pointing radially outwards.
  • the raceway 7 of the axial bearing area 3 of the bearing sleeve 1 is arranged on the side surface of the axial bearing area 3 facing the radial bearing area 2 . Assigned to this is an inner axial washer 14 with a corresponding raceway 15.
  • the inner axial washer 14 forms an axial stop for the radial cage 5 on the inner edge side and has an outer peripherally extending edge region 16 in the axial direction, which serves to enclose the axial cage 8. which is xed over several circumferential caulking 17 fi. With the caulking 17, the radial / thrust bearing unit will hold together.
  • the raceway 7' for the axial bearing region 3 of the bearing sleeve 1 is located on the end face of the axial bearing region 3 that faces away from the radial bearing region 2.
  • An external axial disk 14' with a corresponding raceway 15' is assigned to it. .
  • the axial cage 8 is fixed in position via an inner peripheral edge section 18 of the axial washer 14 ′ with caulking 13 which engages behind the axial cage 8 .
  • the invention is not limited to the two preferred embodiments described above. It is also conceivable that rolling bodies other than needles for the combined radial/axial bearing unit can be used, for example rollers, and the hollow-cylindrical radial bearing area 2 of the bearing sleeve 1 can also be combined with an associated outer sleeve, depending on the application.

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

Abstract

The invention relates to a combined radial/axial bearing unit having a bearing sleeve (1) produced monolithically from a formed sheet-metal material, comprising a hollow-cylindrical radial bearing region (2) having an externally circumferential raceway (4) for rolling bodies (6) guided in a radial cage (5), and a disc-like axial bearing region (3), adjoining said radial bearing region, having a raceway (7), arranged on one of the two side faces, for rolling bodies (9) guided in an axial cage (8), wherein, to axially secure the axial bearing and the radial cage to that end of the hollow-cylindrical radial bearing region that faces away from the axial bearing region, a peripheral region (10) that is angled radially outwardly in one piece is provided for axial securing, in order to form a cohesive structural unit.

Description

Kombinierte Radial-/Axiallaqereinheit mit umformtechnisch herqestellten Combined radial/axial bearing unit with manufactured by forming
Komponenten components
Die vorliegende Erfindung betrifft eine kombinierte Radial-/Axiallagereinheit mit um formtechnisch hergestellten Komponenten, insbesondere einer aus einem umgeform ten Blechmaterial hergestellten Lagerhülse, umfassend einen hohlzylindrischen Radi allagerbereich mit einer außenumfänglichen Laufbahn für in einem Radialkäfig geführ ten Wälzkörpern, welche eine Radiallagerkomponente bilden. Hierzu benachbart schließt sich ein Axiallagerkomponente an. The present invention relates to a combined radial/axial bearing unit with components manufactured by molding, in particular a bearing sleeve made from a formed sheet metal material, comprising a hollow-cylindrical radial bearing area with an outer circumferential raceway for rolling elements guided in a radial cage, which form a radial bearing component. Adjacent to this is an axial bearing component.
Das Einsatzgebiet der Erfindung erstreckt sich vornehmlich auf die Kraftfahrzeugtech nik. Dort kommen hier interessierende Lagereinheiten beispielsweise in einem An triebsstrang überall dort zum Einsatz, wo eine Welle sowohl in radialer als auch in axi aler Richtung zu lagern ist, beispielsweise bei einer Ritzelwellenlagerung eines Achs- differentials. The field of application of the invention extends primarily to the motor vehicle technology. Bearing units of interest here are used, for example, in a drive train wherever a shaft is to be supported in both the radial and axial direction, for example in the case of a pinion shaft bearing of an axle differential.
Stand der Technik State of the art
Aus der DE 10 2011 079 750 A1 geht eine kombinierte Radial-/Axiallagereinheit der hier interessierenden Art hervor. Hierbei weist die Radiallagerkomponente einen In nenring und einen Außenring auf, zwischen denen sich käfiggeführte Wälzkörper, hier in Form von Rollen, befinden. Die Axiallagerkomponente umfasst zwei Axialscheiben, zwischen denen die ebenfalls üblichen käfiggeführten Rollen angeordnet sind. Der Außenring der Radiallagerkomponente und die dieser zugewandte Axialscheibe der Axiallagerkomponente sind zur Bildung einer vorgefertigten Baueinheit mechanisch miteinander und zugleich relativ beweglich zueinander gekoppelt. Analog Dasselbe ist zwischen dem Innenring der Radiallagerkomponente und der außen liegenden Axial scheibe der Axiallagerkomponente realisiert. DE 10 2011 079 750 A1 discloses a combined radial/axial bearing unit of the type of interest here. Here, the radial bearing component has an inner ring and an outer ring, between which cage-guided rolling elements, here in the form of rollers, are located. The thrust bearing component includes two thrust washers, between which the cage-guided rollers, which are also standard, are arranged. The outer ring of the radial bearing component and the axial disk of the axial bearing component facing it are mechanically coupled to one another and at the same time movable relative to one another to form a prefabricated structural unit. Analog The same is realized between the inner ring of the radial bearing component and the outer thrust washer of the thrust bearing component.
Zwar lässt sich dieser vorbekannte in sich zusammenhaltende Bauteilverbund in ein facher Weise endmontieren, jedoch erfordert die Vormontage der verschiedenen Ein zelteile sowie deren Herstellung einen entsprechenden Fertigungsaufwand. Insbeson- dere erfordert die Vormontage auch ein Erwärmen des distalen Endbereichs des In nenrings der Radiallagerkomponente, um diesen anschließend umzubiegen, womit der Zusammenhalt der kombinierten Radial-/Axiallagereinheit geschaffen wird. It is true that this previously known component assembly that is held together can be assembled in a simple manner, but the pre-assembly of the various individual parts and their production requires a corresponding manufacturing effort. in particular more, the pre-assembly also requires heating of the distal end region of the inner ring of the radial bearing component in order to then bend it over, with which the cohesion of the combined radial/axial bearing unit is created.
Es ist daher die Aufgabe der vorliegenden Erfindung, eine kombinierte Radial- /Axiallagereinheit der vorstehend beschriebenen Art dahingehend weiter zu verbes sern, dass diese weitestgehend umformtechnisch herstellbar ist und aus einer mini malen Anzahl an montagefreundlich konstruierten Einzelbauteilen besteht. It is therefore the object of the present invention to further improve a combined radial/axial bearing unit of the type described above such that it can be produced as far as possible by forming and consists of a minimum number of individual components designed to be easy to assemble.
Kurzbeschreibunq der Erfindung Brief description of the invention
Die Aufgabe wird durch eine kombinierte Radial-/Axiallagereinheit gemäß Anspruch 1 gelöst. Die nachfolgenden abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder. The object is achieved by a combined radial/axial bearing unit according to claim 1. The following dependent claims reflect advantageous developments of the invention.
Die Erfindung schließt die technische Lehre ein, dass eine kombinierte Radial- /Axiallagereinheit mit einer aus einem umgeformten Blechmaterial hergestellten La gerhülse einen hohlzylindrischen Radiallagerbereich mit einer außenumfänglichen Laufbahn für in einem Radialkäfig geführten Wälzkörpern und einen hieran angren zenden scheibenförmigen Axiallagerbereich mit einer an einer der beiden Seitenflä chen angeordneten Laufbahn für in einem Axialkäfig geführten Wälzkörpern umfasst, wobei zur axialen Sicherung des Radialkäfigs an dem dem Axiallagerbereich abge wandten Ende des hohlzylindrischen Radiallagerbereichs ein nach radial außen ab gewinkelter Randbereich vorgesehen ist, um eine in sich selbst zusammenhaltende Baueinheit zu bilden. The invention includes the technical teaching that a combined radial/axial bearing unit with a bearing sleeve made from a formed sheet metal material has a hollow-cylindrical radial bearing area with an outer circumferential raceway for rolling elements guided in a radial cage and an adjoining disk-shaped axial bearing area with one on one of the two Seitenflä chen arranged raceway for guided in an axial cage includes rolling elements, wherein for axial securing of the radial cage at the end of the axial bearing area abge facing abge of the hollow cylindrical radial bearing area is provided a radially outwardly angled edge area to form a self-cohesive unit.
Der Vorteil der erfindungsgemäßen Lösung liegt insbesondere darin, dass die funkti onsintegriert umgeformte Lagerhülse der gesamten Baueinheit eine starre Stabilität verleiht und die verschiedenen Komponenten in einfacher Weise dadurch montierbar sind, dass zunächst der Axiallagerkäfig mit Wälzkörpern, danach die Axialscheibe, dann der Radiallagerkäfig mit Wälzkörpern auf den hohlzylindrischen Bereich der La gerhülse aufschiebbar sind, um schließlich den distalen Randbereich der Lagerhülse nach radial außen hin abzuwinkeln oder umzubördeln. Durch die den Axiallagerbe- reich sowie den Radiallagerbereich umfassende und mit jeweiligen Laufbahnen ver sehene einstückig monolithische und einmaterialig ausgebildete Lagerhülse wird die technische Voraussetzung für die einfach zu montierende und in sich selbst zusam menhaltende Baueinheit gebildet. Unter einer monolithischen Lagerhülse wird im Hin blick auf die Erfindung ein aus einem Blechmaterial einstückig umgeformtes Bauteil verstanden, welches die Funktion einer der Laufbahnen des Axiallagerbereichs, die Funktion einer der Laufbahnen des Radiallagerbereichs sowie auch die Funktion einer Axialsicherung für den Radialkäfig beinhaltet. Dabei gibt die erfindungsgemäß funkti onsintegrierte Lagerhülse eine exakt rechtwinklige Ausrichtung beider Lagerbereiche zueinander vor. The advantage of the solution according to the invention lies in particular in the fact that the functionally integrated, formed bearing sleeve gives the entire assembly rigid stability and the various components can be assembled in a simple manner by first assembling the axial bearing cage with rolling elements, then the axial disk, then the radial bearing cage with rolling elements the hollow-cylindrical area of the bearing sleeve can be slid on, in order finally to bend or bead the distal edge area of the bearing sleeve radially outward. Due to the axial bearing Rich and comprehensive as well as the radial bearing area and provided with respective raceways ver provided one-piece monolithic and single-material bearing sleeve is the technical prerequisite for the easy-to-assemble and self-cohesive assembly formed. In the context of the invention, a monolithic bearing sleeve is understood to mean a component formed in one piece from a sheet metal material, which includes the function of one of the raceways of the axial bearing area, the function of one of the raceways of the radial bearing area and also the function of an axial lock for the radial cage. The bearing sleeve, which is functionally integrated according to the invention, specifies that the two bearing areas are aligned exactly at right angles to one another.
Im Hinblick auf die Axialsicherungsfunktion des Lagerkäfigs, welche die Baueinheit schließlich in sich zusammenhält, sollte der hierfür dienende abgewinkelte Randbe reich vorzugsweise direkt stirnseitig am Radialkäfig zur Anlage kommen. Dabei sollte die Länge des Randbereichs höchstens der Höhe des Radialkäfigs entsprechen, ins besondere auch unterhalb des Wälzkörperdurchmessers liegt, um sowohl eine maxi male Anlagefläche der beiden benachbarten Bauteile zu gewährleisten, als auch die Stirnseite des gewöhnlich aus Kunststoff bestehenden Radialkäfigs zusätzlich zu schützen und ein Eindringen von Schmutz seitens dieser Stirnseite in die Radial- /Axiallagereinheit zu minimieren. With regard to the axial securing function of the bearing cage, which ultimately holds the unit together, the angled edge portion serving this purpose should preferably come to rest directly on the front side of the radial cage. The length of the edge area should correspond at most to the height of the radial cage, and in particular be below the diameter of the rolling element, in order to ensure both a maximum contact surface of the two adjacent components and to additionally protect the end face of the radial cage, which is usually made of plastic, and prevent penetration of dirt from this end face into the radial/thrust bearing unit.
Die erfindungsgemäß funktionsintegrierte Lagerhülse ist vorzugsweise als Stanzbie- geteil ausgeführt, dessen Radiallagerbereich durch Tiefziehen erzeugt ist, wobei die Laufbahnen durch Prägen eingebracht sind. Dabei weist der abgewinkelte Randbe reich vorzugsweise einen ausgehend von der Hohlzylinderform des Radiallagerbe reichs abgestreckten Übergangsbereich auf, mit einem sich hieran anschließenden, nach radial außen gebogenen Randbereich zur Axialsicherung. Insbesondere durch das Abstrecken fällt die Materialdicke im Randbereich kleiner aus als die Materialdicke im Bereich der Laufbahn des Radiallagerbereichs. Hierdurch wird einerseits eine funk tionsgerecht stabile Laufbahn erzeugt und andererseits lässt sich der dünnere Rand bereich einfacher umbiegen oder umbördeln, um die gewünschte Axialsicherung zu bilden. Dieser Materialdickeunterschied lässt sich in einfacher Weise durch das Tief ziehen erzeugen, so dass hierfür keine aufwendig spanenden Bearbeitungsschritte er- forderlich sind. Insgesamt lässt sich die erfindungsgemäße Lagerhülse damit komplett als tiefgezogenes Stanzbiegeteil fertigen. The functionally integrated bearing sleeve according to the invention is preferably designed as a stamped and bent part, the radial bearing area of which is produced by deep-drawing, with the raceways being introduced by embossing. In this case, the angled edge region preferably has a transition region that is stretched out starting from the hollow cylindrical shape of the radial bearing region, with an adjoining edge region that is bent radially outwards for axial securing. In particular, due to the ironing, the material thickness in the edge area turns out to be smaller than the material thickness in the area of the raceway of the radial bearing area. On the one hand, this creates a functionally stable raceway and, on the other hand, the thinner edge area can be bent over or beaded more easily in order to form the desired axial lock. This difference in material thickness can be produced in a simple manner by deep drawing, so that no costly machining steps are required for this. are required. Overall, the bearing sleeve according to the invention can thus be manufactured completely as a deep-drawn stamped and bent part.
Gemäß einer ersten bevorzugten Ausführungsform der Radial-/Axiallagereinheit ist die Laufbahn für den Axiallagerbereich der Lagerhülse an der dem Radiallagerbereich zugewandten Seitenfläche des Axiallagerbereichs angeordnet, wobei eine innen lie gende Axialscheibe mit einer hierzu korrespondierenden Laufbahn vorgesehen ist. Gemäß einer diese Ausführungsform weiter verbessernden Maßnahme wird vorge schlagen, dass die innen liegende Axialscheibe innenrandseitig einen axialen Anlauf für den Radialkäfig bildet und gegenüber der Lagerhülse über formschlüssige Ver drehsicherungsmittel gehalten ist, beispielsweise durch eine nicht-kreisförmigen Kon turierung. Es ist jedoch auch denkbar, andere formschlüssige Verdrehsicherungsmit tel, wie beispielsweise eine Verstiftung Feder-Nut-Verbindung oder dergleichen, vor zusehen. Hierdurch lässt sich eine funktionsgerecht aufeinander abgestimmte und kompakt bauende Lagereinheit mit einfacher Profilgebung darstellen. According to a first preferred embodiment of the radial/axial bearing unit, the raceway for the axial bearing area of the bearing sleeve is arranged on the side surface of the axial bearing area facing the radial bearing area, with an inner thrust washer having a corresponding raceway being provided. According to a measure that further improves this embodiment, it is proposed that the inner axial disk forms an axial stop for the radial cage on the inner edge and is held against the bearing sleeve by means of positive locking means, for example by a non-circular contour. However, it is also conceivable to use other form-fitting anti-rotation devices, such as a pinned tongue-groove connection or the like, to provide for this. As a result, a functionally coordinated and compact bearing unit with a simple profile can be produced.
Gemäß einer zweiten Ausführungsform wird vorgeschlagen, dass die Laufbahn für den Axiallagerbereich der Lagerhülse an der dem Radiallagerbereich abgewandten Seitenfläche des Axiallagerbereichs angeordnet ist, wobei eine außen liegende Axial scheibe mit einer hierzu korrespondierenden Laufbahn vorgesehen ist. Diese Variante einer außen liegenden Axialscheibe lässt relativ breitere Laufbahnen für den Radialla gerbereich zu und ist im Gegensatz zu der vorstehend erörterten ersten Ausführungs form langbauender. According to a second embodiment, it is proposed that the raceway for the axial bearing area of the bearing sleeve is arranged on the side surface of the axial bearing area facing away from the radial bearing area, with an outer axial disk being provided with a corresponding raceway. This variant of an external axial disk allows relatively wider raceways for the radial bearing area and, in contrast to the first embodiment discussed above, is longer.
Die erfindungsgemäße kombinierte Radial-/Axiallagereinheit lässt sich vorteilhafter weise mit Wälzkörpern umsetzen, welche im Radiallagerbereich und/oder Axiallager bereich in Form von Nadeln für eine Nadellagerung ausgeführt sind. Es ist jedoch auch denkbar, verschiedenartige Wälzkörper, wie Rollen, Kugeln, miteinanderzu paa ren, wozu die Laufbahnen entsprechend anzupassen sind. The combined radial/axial bearing unit according to the invention can advantageously be implemented with rolling elements which are designed in the radial bearing area and/or axial bearing area in the form of needles for a needle bearing. However, it is also conceivable to pair different types of rolling bodies, such as rollers and balls, with one another, for which purpose the raceways must be adapted accordingly.
Detailbeschreibunq anhand Zeichnung Weitere die Erfindung verbessernde Maßnahmen werden gemeinsam mit der Be schreibung zweier Ausführungsbeispiele der Erfindung anhand der Figuren näher dargestellt. Es zeigt: Detailed description based on drawing Further measures improving the invention are shown in more detail together with the description of two exemplary embodiments of the invention with reference to the figures. It shows:
Fig. 1 einen Teillängsschnitt durch eine kombinierte Radial-/Axiallagereinheit gemäß einer ersten Ausführungsform, und 1 shows a partial longitudinal section through a combined radial/axial bearing unit according to a first embodiment, and
Fig. 2 einen Teillängsschnitt durch eine kombinierte Radial-/Axiallagereinheit gemäß einer zweiten Ausführungsform. 2 shows a partial longitudinal section through a combined radial/axial bearing unit according to a second embodiment.
Gemäß Fig. 1 umfasst die kombinierte Radial-/Axiallagereinheit der ersten Ausfüh rungsform eine aus einem umgeformten Blechmaterial monolithisch hergestellte La gerhülse 1 , welche mit einem hohlzylindrischen Radiallagerbereich 2 mit einer außen umfänglich geprägten Laufbahn 4 für in einem Radiallagerkäfig 5 geführten Wälzkör pern 6 und einen hieran angrenzenden scheibenförmigen Axiallagerbereich 3 mit ei ner an einer der beiden Seitenflächen angeordneten ebenfalls geprägten Laufbahn 7 für in einem Axialkäfig 8 geführten Wälzkörpern 9. According to Fig. 1, the combined radial/thrust bearing unit of the first embodiment comprises a bearing sleeve 1 monolithically produced from a formed sheet metal material, which has a hollow-cylindrical radial bearing area 2 with a raceway 4 stamped on the outside circumferentially for roller bodies 6 guided in a radial bearing cage 5 and a adjoining disk-shaped axial bearing area 3 with an also embossed raceway 7 arranged on one of the two side surfaces for rolling elements 9 guided in an axial cage 8.
Zur axialen Sicherung des Radialkäfigs 5 an dem dem Axiallagerbereich 3 abgewand ten Ende des hohlzylindrischen Radiallagerbereichs 2 ist ein nach radial außen ein stückig abgewinkelter Randbereich 10 zur Axialsicherung vorgesehen. Hierdurch wird eine in sich selbst zusammenhaltende Baueinheit gebildet. For the axial securing of the radial cage 5 at the end of the hollow-cylindrical radial bearing region 2 facing away from the axial bearing region 3, a peripheral region 10 that is angled radially outward in one piece is provided for axial securing. In this way, a structural unit that holds itself together is formed.
Der abgewinkelte Randbereich 10 kommt zur Axialsicherung direkt stirnseitig am Ra dialkäfig 5 zur Anlage und weist eine Länge auf, welche in etwa der Höhe des Radial käfigs entspricht. Hierfür ist der abgewinkelte Randbereich 10 ausgehend von der Zy linderform des Radiallagerbereichs 2 über einen demgegenüber abgestreckten Über gangsbereich 11 , welcher den Biegeradius bildet, zum sich hieran anschließenden und nach radial außen zeigenden Randbereich 10 geformt. Die Laufbahn 7 des Axiallagerbereichs 3 der Lagerhülse 1 ist bei dieser Ausführungs form an der dem Radiallagerbereich 2 zugewandten Seitenfläche des Axiallagerbe reichs 3 angeordnet. Dem zugeordnet ist eine innenliegende Axialscheibe 14 mit einer hierzu korrespondierenden Laufbahn 15. Die innenliegende Axialscheibe 14 bildet in nenrandseitig einen axialen Anlauf für den Radialkäfig 5 und weist einen außenum fänglich sich in Axialrichtung erstreckenden Randbereich 16 auf, welcher zur Einfas sung des Axialkäfigs 8 dient, der über mehrere umfangsseitige Verstemmungen 17 fi xiert ist. Mit den Verstemmungen 17 wird die Radial-/Axiallagereinheit zusammenge halten. The angled edge portion 10 comes to axial locking directly on the face of the dialkäfig Ra 5 to the system and has a length which corresponds approximately to the height of the radial cage. For this purpose, the angled edge area 10 is formed from the cylindrical shape of the radial bearing area 2 via a transition area 11 that is straightened in comparison and forms the bending radius, to the adjoining edge area 10 pointing radially outwards. In this embodiment, the raceway 7 of the axial bearing area 3 of the bearing sleeve 1 is arranged on the side surface of the axial bearing area 3 facing the radial bearing area 2 . Assigned to this is an inner axial washer 14 with a corresponding raceway 15. The inner axial washer 14 forms an axial stop for the radial cage 5 on the inner edge side and has an outer peripherally extending edge region 16 in the axial direction, which serves to enclose the axial cage 8. which is xed over several circumferential caulking 17 fi. With the caulking 17, the radial / thrust bearing unit will hold together.
Bei der in Fig. 2 illustrierten zweiten Ausführungsform befindet sich die Laufbahn 7‘ für den Axiallagerbereich 3 der Lagerhülse 1 an der dem Radiallagerbereich 2 abgewand ten Stirnfläche des Axiallagerbereichs 3. Dem zugeordnet ist eine außenliegende Axi alscheibe 14' mit einer hierzu korrespondierenden Laufbahn 15‘. Eine Lagefixierung des Axialkäfigs 8 erfolgt über einen innenumfänglichen Randabschnitt 18 der Axial scheibe 14’ mit Verstemmungen 13, die den Axialkäfig 8 hintergreifen. Zwischen dem Radiallagerbereich 2 und dem Axiallagerbereich 3 befindet sich eine Prägenut 12, so dass der Radialkäfig 5 stirnseitig in etwa vollflächig am Axiallagerbereich 3 der Lager hülse 1 zur Anlage kommt. In the second embodiment illustrated in FIG. 2, the raceway 7' for the axial bearing region 3 of the bearing sleeve 1 is located on the end face of the axial bearing region 3 that faces away from the radial bearing region 2. An external axial disk 14' with a corresponding raceway 15' is assigned to it. . The axial cage 8 is fixed in position via an inner peripheral edge section 18 of the axial washer 14 ′ with caulking 13 which engages behind the axial cage 8 . Between the radial bearing area 2 and the axial bearing area 3 there is an embossing groove 12 so that the radial cage 5 comes to rest on the end face approximately over the entire surface of the axial bearing area 3 of the bearing sleeve 1 .
Die Erfindung ist nicht beschränkt auf die beiden vorstehend beschriebenen bevorzug ten Ausführungsformen. So ist es auch denkbar, dass andere Wälzkörper als Nadeln für die kombinierte Radial-/Axiallagereinheit zum Einsatz kommen, beispielsweise auch Rollen, und der hohlzylindrische Radiallagerbereich 2 der Lagerhülse 1 kann je nach Anwendung auch mit einer zugeordneten Außenhülse kombiniert werden. The invention is not limited to the two preferred embodiments described above. It is also conceivable that rolling bodies other than needles for the combined radial/axial bearing unit can be used, for example rollers, and the hollow-cylindrical radial bearing area 2 of the bearing sleeve 1 can also be combined with an associated outer sleeve, depending on the application.
Bezuqszeichenliste Reference character list
I Lagerhülse 2 Radiallagerbereich I Bearing sleeve 2 radial bearing area
3 Axiallagerbereich 3 thrust bearing area
4 Laufbahn 4 career
5 Radialkäfig 5 radial cage
6 Wälzkörper 7 Laufbahn 6 rolling elements 7 raceway
8 Axialkäfig 8 axial cage
9 Wälzkörper 9 rolling elements
10 Randbereich 10 edge area
I I Übergangsbereich 12 Prägenut I I transition area 12 embossed groove
13 Verstemmung 13 caulking
14 Axialscheibe 14 thrust washer
15 Laufbahn 15 career
16 Randbereich 17 Verstemmung 16 edge area 17 caulking
18 Randabschnitt 18 edge section

Claims

Patentansprüche patent claims
1 . Kombinierte Radial-/Axiallagereinheit mit einer aus einem umgeformten Blech material monolithisch hergestellten Lagerhülse (1 ), umfassend einen hohlzylindrischen Radiallagerbereich (2) mit einer außenumfänglichen Laufbahn (4) für in einem Radial käfig (5) geführten Wälzkörpern (6) und einen hieran angrenzenden und sich radial nach außen weg erstreckenen, scheibenförmigen Axiallagerbereich (3) mit einer an einer der beiden Seitenflächen angeordneten Laufbahn (7) für in einem Axialkäfig (8) geführten Wälzkörpern (9), wobei zur axialen Sicherung des Axiallagers und des Ra dialkäfigs (5) an dem dem Axiallagerbereich (3) abgewandten Ende des hohlzylindri schen Radiallagerbereichs (2) ein nach radialaußen einstückig abgewinkelter Randbe reich (10) zur Axialsicherung vorgesehen ist, um eine in sich selbst zusammenhalten de Baueinheit zu bilden. 1 . Combined radial/axial bearing unit with a bearing sleeve (1) made monolithically from a formed sheet metal material, comprising a hollow-cylindrical radial bearing area (2) with an outer circumferential raceway (4) for rolling elements (6) guided in a radial cage (5) and one adjacent thereto and radially outwardly extending, disk-shaped axial bearing area (3) with a raceway (7) arranged on one of the two side surfaces for rolling elements (9) guided in an axial cage (8), whereby for axial securing of the axial bearing and the radial cage (5 ) at the axial bearing area (3) facing away from the end of the hohlzylindri's radial bearing area (2), a radially outwardly integrally angled Randbe area (10) is provided for axial securing, in order to form a self-contained de unit.
2. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass der abgewinkelte Randbereich (10) direkt stirnseitig am Radialkäfig (5) zur Anlage kommt. 2. Combined radial / axial bearing unit according to claim 1, characterized in that the angled edge region (10) comes to rest directly on the front side of the radial cage (5).
3. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass der abgewinkelte Randbereich (10) einen ausgehend von der Hohlzylinderform des Radiallagerbereichs (2) abgestreckten Übergangsbe reich (11) mit einem sich hieran anschließenden, nach radialaußen gebogenen Rand bereich (10) aufweist. 3. Combined radial/axial bearing unit according to claim 1, characterized in that the angled edge area (10) has a transition area (11) stretched out starting from the hollow cylindrical shape of the radial bearing area (2) with an adjoining edge area (10 ) having.
4. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Länge des Randbereichs (10) höchstens der Hö he des Radialkäfigs (5) entspricht. 4. Combined radial/axial bearing unit according to claim 1, characterized in that the length of the edge region (10) corresponds at most to the height of the radial cage (5).
5. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Materialdicke im Randbereich (10) kleiner ist als die Materialdicke im Bereich der Laufbahn (4) des Radiallagerbereichs (2). 5. Combined radial / axial bearing unit according to claim 1, characterized in that the material thickness in the edge area (10) is smaller than the material thickness in the area of the raceway (4) of the radial bearing area (2).
6. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Laufbahn (7) für den Axiallagerbereich (3) der Lagerhülse (1) an der dem Radiallagerbereich (2) zugewandten Seitenfläche des Axi allagerbereichs (3) angeordnet ist, wobei eine innenliegende Axialscheibe (14) mit ei ner hierzu korrespondierenden Laufbahn (15) vorgesehen ist. 6. Combined radial/axial bearing unit according to claim 1, characterized in that the raceway (7) for the axial bearing area (3) of the bearing sleeve (1) is arranged on the side surface of the axial bearing area (3) facing the radial bearing area (2), wherein an internal thrust washer (14) with a corresponding raceway (15) is provided.
7. Kombinierte Radial-/Axiallagereinheit nach Anspruch 6, dadurch gekennzeichnet, dass die innenliegende Axialscheibe (14) innenrandseitig einen axialen Anlauf für den Radialkäfig (5) bildet und gegenüber der Lagerhülse (1) verliergesichert gehalten ist. 7. Combined radial/axial bearing unit according to claim 6, characterized in that the inner axial disk (14) forms an axial stop for the radial cage (5) on the inner edge and is held captive relative to the bearing sleeve (1).
8. Kombinierte Radial-/Axiallagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Laufbahn (7’) für den Axiallagerbereich (3) der Lagerhülse (1) an der dem Radiallagerbereich (2) abgewandten Seitenfläche des Axi allagerbereichs (3) angeordnet ist, wobei eine außenliegende Axialscheibe (14’) mit einer hierzu korrespondierenden Laufbahn (15’) vorgesehen ist. 8. Combined radial/axial bearing unit according to claim 1, characterized in that the raceway (7') for the axial bearing area (3) of the bearing sleeve (1) is arranged on the side face of the axial bearing area (3) facing away from the radial bearing area (2), an outer axial disk (14') with a corresponding raceway (15') being provided.
9. Kombinierte Radial-/Axiallagereinheit nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Lagerhülse (1) als Stanzbiegeteil ausgeführt, dessen Radiallagerbereich durch Tiefziehen erzeugt ist, wobei zumindest die Lauf bahn (7) durch Prägen eingebracht sind. 9. Combined radial/axial bearing unit according to one of the preceding claims, characterized in that the bearing sleeve (1) is designed as a stamped and bent part, the radial bearing area of which is produced by deep-drawing, with at least the running track (7) being introduced by embossing.
10. Kombinierte Radial-/Axiallagereinheit nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Wälzkörper (6) des Radiallagerbereichs (6) und/oder die Wälzkörper (9) des Axiallagerbereichs (3) in Form von Nadeln für eine Nadellagerung ausgebildet sind. 10. Combined radial/axial bearing unit according to one of the preceding claims, characterized in that the rolling elements (6) of the radial bearing area (6) and/or the rolling elements (9) of the axial bearing area (3) are designed in the form of needles for a needle bearing.
PCT/DE2022/100226 2021-04-26 2022-03-25 Combined radial/axial bearing unit with components produced by forming WO2022228603A1 (en)

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Citations (4)

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JPS50139854U (en) * 1974-05-08 1975-11-18
JP2012057666A (en) * 2010-09-07 2012-03-22 Nsk Ltd Radial-thrust combined needle bearing
DE102011079750A1 (en) 2011-07-25 2013-01-31 Schaeffler Technologies AG & Co. KG Combined radial-axial-roller bearing for use in rear axle to drive rear wheel of motor vehicle, has outer ring and axial disk, which are mechanically connected with each other for formation of prefabricated component
DE102019130286A1 (en) * 2019-11-11 2020-12-17 Schaeffler Technologies AG & Co. KG Sealing sleeve with combined axial bearing means for a pressure medium rotary feedthrough

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Publication number Priority date Publication date Assignee Title
DE6906196U (en) 1969-02-13 1969-08-21 Duerkoppwerke COMBINED RADIAL AXIAL ROLLING BEARING
DE2019090A1 (en) 1970-04-21 1971-11-11 Schaeffler Ohg Industriewerk Thin-walled drawn sleeve for a combined radial-axial bearing
FR2339772A1 (en) 1976-01-29 1977-08-26 Nadella RADIAL-AXIAL BEARING ASSEMBLY
JP2012167690A (en) 2011-02-10 2012-09-06 Nsk Ltd Radial-thrust combination bearing
DE102012222272B3 (en) 2012-12-05 2014-02-13 Schaeffler Technologies AG & Co. KG Transmission device with a planetary drive, with a lubricating device and with a rolling bearing

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Publication number Priority date Publication date Assignee Title
JPS50139854U (en) * 1974-05-08 1975-11-18
JP2012057666A (en) * 2010-09-07 2012-03-22 Nsk Ltd Radial-thrust combined needle bearing
DE102011079750A1 (en) 2011-07-25 2013-01-31 Schaeffler Technologies AG & Co. KG Combined radial-axial-roller bearing for use in rear axle to drive rear wheel of motor vehicle, has outer ring and axial disk, which are mechanically connected with each other for formation of prefabricated component
DE102019130286A1 (en) * 2019-11-11 2020-12-17 Schaeffler Technologies AG & Co. KG Sealing sleeve with combined axial bearing means for a pressure medium rotary feedthrough

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