EP1751439A1 - Tapered roller bearing for a wheel - Google Patents

Tapered roller bearing for a wheel

Info

Publication number
EP1751439A1
EP1751439A1 EP05750299A EP05750299A EP1751439A1 EP 1751439 A1 EP1751439 A1 EP 1751439A1 EP 05750299 A EP05750299 A EP 05750299A EP 05750299 A EP05750299 A EP 05750299A EP 1751439 A1 EP1751439 A1 EP 1751439A1
Authority
EP
European Patent Office
Prior art keywords
wheel bearing
bearing unit
tapered rollers
axial
unit according
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.)
Withdrawn
Application number
EP05750299A
Other languages
German (de)
French (fr)
Inventor
Heinrich Hofmann
Johannes De Boer
Horst DÖPPLING
Bernhard Wilm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler KG filed Critical Schaeffler KG
Publication of EP1751439A1 publication Critical patent/EP1751439A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C19/22—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
    • 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
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Definitions

  • wheel bearings have at least one but mostly two or more inner raceways for tapered rollers directly on a wheel carrier or on one or more outer rings.
  • the outer ring or rings are received in a wheel carrier.
  • the wheel carrier is provided with one or more flanges.
  • a flange is used for fastening the wheel carrier on the vehicle or for fastening one or more vehicle wheels to the wheel carrier.
  • the hub is fastened on the vehicle side and the inner raceways rotate around the fixed hub. If the wheel carrier is fixed on the vehicle side, the hub is rotatably mounted in the wheel carrier by means of the wheel bearing, as a result of which the outer raceways are rotatably supported relative to the vehicle-mounted inner raceways. At the In this case the hub is / are attached to one or more vehicle wheels.
  • inclined roller bearings in particular tapered roller bearings
  • tapered roller bearings are able to absorb both forces acting radially to the axis of rotation and axially, i.e. acting in the same direction as the axis of rotation of the wheel bearing, via the raceways due to the contact angle specified by the design.
  • axial supports must be provided for the flanks of the rollers, which prevent the rollers from moving axially out of the raceways.
  • These axial supports are usually rims that extend beyond the raceways of the inner rings of the wheel bearing on the inner rings on which the end faces of the tapered rollers run.
  • the object of the invention is therefore to provide a wheel bearing unit that is robust, whose inner and outer raceways can be produced inexpensively and whose individual parts can be easily assembled.
  • the respective axial support assigned to an inner raceway is a flange formed in one piece with the inner raceway. If the inner raceway (s) are arranged directly on the wheel carrier, the or the rims are accordingly made in one piece and in one material with the wheel carrier.
  • the inner raceway (s) is / are preferably formed on an outer ring which is mounted in the wheel carrier.
  • each of the inner raceways is assigned a shelf, the inner raceways preferably running axially between the shelves, i.e. the large end faces of one row of tapered rollers face away from the large end faces of the axially adjacent row of tapered rollers.
  • the inner rings are without a shelf and are therefore easier to machine.
  • the unit is easy to assemble. The number of individual parts and thus the assembly effort is reduced.
  • the wheel bearing as a structural unit that can be completely assembled in a wheel carrier with one or two inner rings and with or without a hub pre-assembled.
  • the wheel bearing has at least one axial securing device per inner ring, which is in operative connection with the respective inner ring.
  • the axial lock connects axially to the tapered rollers on the side of the smallest diameter of the tapered rollers and is in positive engagement with the inner ring.
  • the axial securing stands radially beyond the smallest diameter of the respective outer raceway on the inner ring and thus axially faces the end faces of the tapered roller on the part of the smallest diameter of the tapered rollers.
  • the wheel bearing can be transported and handled pre-assembled, since the axial lock holds the tapered rollers and the outer and inner ring together by contact with the small end faces of the tapered rollers.
  • the axial lock alternatively holds the unit together by axial contact with a cage instead of direct contact with the end faces in which the tapered rollers are guided.
  • the simplest form of axial securing is a securing ring which engages in an annular groove on the inner ring.
  • the axial lock is formed directly on a cage for the tapered rollers.
  • the axial securing device engages in a form-fitting manner in an annular groove of the inner ring from the cage.
  • Such an axial lock is, for example, one or are preferably a plurality of snap-in catches arranged on the circumference of the plastic cage, which spring open when the cage is pushed onto the inner ring with the rolling elements and then deflect into a corresponding annular groove on the inner ring.
  • FIG. 1 shows a wheel bearing unit 1, of which preferably two wheel bearing units 1 installed against one another are installed in a wheel carrier (not shown).
  • the wheel bearing unit 1 has an inner ring 2 with an outer race 3 and an outer ring 4 with an inner race 5.
  • Tapered rollers 6 are arranged between the inner ring 2 and the outer ring 4 and run on the inner race 5 and on the outer race 3.
  • the tapered rollers 6 are guided in a cage 9.
  • the outer ring 4 has a flange 7 which is formed in one piece with the outer ring 4 and thus in one piece with the inner race 5.
  • the rim 7 protrudes from the largest inner diameter D, radially beyond the inner raceway 5 in the direction of the axis of rotation 1a, and is thus opposite from the large end face 6a of the tapered roller 6 due to the large diameter of the tapered rollers 6.
  • the wheel bearing unit 1 is held in place by means of the axial securing means 8 in the form of a plurality of snap noses 9a formed in one piece with the cage 9.
  • the snap lug 9a is formed on the side of the cage 9 which connects to the small diameter of the tapered rollers 6.
  • the axial lock 8 engages in a form-fitting manner in a groove 2b of the inner ring 2, which adjoins the outer race 3 at its smallest outer diameter D a .
  • the outer ring 4 has a cylindrical outer surface 4a, which is provided for the seat in the wheel carrier, not shown.
  • the inner ring 2 is provided with an inner lateral surface 2a for the seat on a hub, not shown.
  • FIG. 2 shows a wheel bearing unit 10 with two rows of tapered rollers 6 positioned against one another.
  • the tapered rollers 6, each guided in a cage 11, are preloaded against a common outer ring 13 by means of the inner rings in the installed state.
  • the preload is usually carried out on a hub, not shown, on which the inner rings 12 sit with the inner surface.
  • Each of the inner rings 12 has an outer race 3 and the outer ring 13 has two inner races 5.
  • the outer ring 13 has two of the rims 7, each of which is formed in one piece with the outer ring 13 and thus in one piece with the respective inner race 5.
  • Each of the ribs 7 protrudes radially beyond the inner raceway 5 in the direction of the axis of rotation 10a on the part of the largest inner diameter D.
  • the wheel bearing unit 10 is held in place by means of the axial locks 8 in the form of locking rings 14.
  • Each of the axial locks 8 sits in a form-fitting manner in a groove 12b of the respective inner ring 12.
  • the grooves 12b adjoin the respective outer race 3 at their smallest outer diameter D a .
  • the outer ring 13 has a cylindrical outer surface 13a, which is provided for the seat in the wheel carrier, not shown.
  • Wheel bearing unit 8 Axial locka Rotation axis 9 Cage inner ring 9a Snap nose inner circumferential surface 10 Wheel bearing unitb Groove 10a Rotation axis outer raceway 11 Cage outer ring 12 Inner ringa Outer circumferential surface 12a Inner circumferential surface inner raceway 12b Groove tapered roller 13 Outer ringa Front surface 13a External surface board 14 Circlip

Landscapes

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

Abstract

The invention relates to a wheel bearing unit (1, 10) comprising at least one inner raceway (5) for tapered rollers (6) and an axial support for front faces (6a) of the tapered rollers (6) that is joined to the inner raceway (5). The axial support is axially joined to the tapered rollers (6) on the side of the large diameter of the tapered rollers (6), and the axial support radially projects above the largest inside diameter of the inner raceway (5).

Description

Bezeichnung der Erfindung Name of the invention
KEGELROLLENLAGER FÜR EIN RADTapered roller bearings for one wheel
Beschreibungdescription
Gebiet der ErfindungField of the Invention
Eine derartige Radlagereinheit ist in US 5,037,214 beschrieben. Diese Radlagereinheit wurde geschaffen, um die Herstellung zu vereinfachen und um die Montage der Einzelteile zu vereinheitlichen.Such a wheel bearing unit is described in US 5,037,214. This wheel bearing unit was created to simplify production and to standardize the assembly of the individual parts.
Üblicherweise weisen Radlager wenigstens eine aber zumeist zwei oder mehr Innenlaufbahnen für Kegelrollen direkt an einem Radträger oder an einem bzw. mehr Außenringen auf. Der oder die Außenringe sind in einem Radträger aufgenommen. Der Radträger ist mit einem oder mehreren Flanschen versehen. In der Regel dient ein Flansch zur fahrzeugseitigen Befestigung des Radträgers oder zur Befestigung eines oder mehrerer Fahrzeugräder an dem Radträger. Im zuletzt genannten Fall ist die Nabe fahrzeugseitig befestigt und die Innenlaufbahnen rotieren um die feststehende Nabe. Wenn der Radträger fahrzeugseitig fest ist, ist die Nabe drehbar mittels des Radlagers drehbar in dem Radträger gelagert, wodurch die Außenlaufbahnen gegenüber den fahrzeugfesten Innenlaufbahnen drehbar gelagert sind. An der Nabe ist/sind in diesem Fall ein oder mehrere Fahrzeugräder befestigt.Usually, wheel bearings have at least one but mostly two or more inner raceways for tapered rollers directly on a wheel carrier or on one or more outer rings. The outer ring or rings are received in a wheel carrier. The wheel carrier is provided with one or more flanges. As a rule, a flange is used for fastening the wheel carrier on the vehicle or for fastening one or more vehicle wheels to the wheel carrier. In the latter case, the hub is fastened on the vehicle side and the inner raceways rotate around the fixed hub. If the wheel carrier is fixed on the vehicle side, the hub is rotatably mounted in the wheel carrier by means of the wheel bearing, as a result of which the outer raceways are rotatably supported relative to the vehicle-mounted inner raceways. At the In this case the hub is / are attached to one or more vehicle wheels.
Es ist bekannt, dass Schrägrollen- insbesondere Kegelrollenlager auf Grund des durch die Konstruktion vorgegebenen Kontaktwinkels in der Lage sind sowohl radial zur Rotationsachse wirkende als auch axiale, also mit der Rotationsachse des Radlagers gleichgerichtet wirkende Kräfte bzw. Komponenten von Kräften über die Laufbahnen aufzunehmen. Zusätzlich müssen für die Flanken der Rollen jedoch Axialstützen vorgesehen werden, die das a- xiale Auswandern der Rollen aus den Laufbahnen verhindern. Diese Axial- stützen sind üblicherweise über die Laufbahnen der Innenringe des Radlagers hinaus stehende Borde an den Innenringen an denen die Stirnflächen der Kegelrollen anlaufen.It is known that inclined roller bearings, in particular tapered roller bearings, are able to absorb both forces acting radially to the axis of rotation and axially, i.e. acting in the same direction as the axis of rotation of the wheel bearing, via the raceways due to the contact angle specified by the design. In addition, however, axial supports must be provided for the flanks of the rollers, which prevent the rollers from moving axially out of the raceways. These axial supports are usually rims that extend beyond the raceways of the inner rings of the wheel bearing on the inner rings on which the end faces of the tapered rollers run.
Mit der Radlagerung nach US 5,037,214 wurde eine Radlagerung geschaf- fen, bei der zumindest eine der Axialstützen in Form eines zu dem Außenring separaten Stützringes an dem Außenring befestigt ist. Diese Axialstützen schließen sich der Innenlaufbahn axial seitens des größten Durchmessers der Kegelrollen an die Kegelrollen an. Die Axialstütze ragt dabei radial über den größten Innendurchmesser der jeweiligen Innenlaufbahn hinaus, an die sich die Axialstütze anschließt. Die Montage der Lager ist somit zunächst vereinfacht. Diese Lösung ist insbesondere für Lager, in denen hohe Axialkräfte wirken, jedoch nicht befriedigend. Der Ring ist in diesem Falle, wie in US 5,037,214 beschrieben, nur durch eine Schweißnaht sicher gegen die Kräfte in Position gehalten. Die mit dem Schweißvorgang in das Lager eingebrachte Wärme kann einerseits die funktionsbedingte Axialspannung in dem Lager negativ beeinflussen, zumal diese durch mittels Schweißung unlösbar befestigten Ring nicht mehr korrigierbar ist. Andererseits schadet die Wärme aus dem Schweißvorgang dem Fett im Lager und beeinflusst auch die Genauigkeit der Anordnung durch Wärmeverzug. Unabhängig davon ist die Montage des Radlagermoduls aus einzelnen Teilen noch relativ aufwändig. ZusammenfassungWith the wheel bearing according to US 5,037,214, a wheel bearing was created in which at least one of the axial supports is fastened to the outer ring in the form of a support ring separate from the outer ring. These axial supports join the inner raceway axially on the side of the largest diameter of the tapered rollers to the tapered rollers. The axial support projects radially beyond the largest inner diameter of the respective inner raceway to which the axial support adjoins. The assembly of the bearings is thus initially simplified. This solution is unsatisfactory, in particular for bearings in which high axial forces act. In this case, as described in US Pat. No. 5,037,214, the ring is only held securely in position against the forces by a weld seam. The heat introduced into the bearing during the welding process can, on the one hand, negatively influence the function-related axial tension in the bearing, especially since this cannot be corrected by a ring that is permanently attached by welding. On the other hand, the heat from the welding process damages the grease in the bearing and also affects the accuracy of the arrangement due to heat distortion. Regardless of this, the assembly of the wheel bearing module from individual parts is still relatively complex. Summary
Die Aufgabe der Erfindung ist es daher, eine Radlagereinheit zu schaffen, die robust ist, deren Innen- und Außenlaufbahnen sich kostengünstig herstellen lassen und deren Einzelteile sich einfach montieren lassen.The object of the invention is therefore to provide a wheel bearing unit that is robust, whose inner and outer raceways can be produced inexpensively and whose individual parts can be easily assembled.
Diese Aufgabe ist dadurch gelöst, dass die jeweilige einer Innenlaufbahn zugeordnete Axialstütze ein einteilig mit der Innenlaufbahn ausgebildeter Bord ist. Wenn die lnnenlaufbahn(en) direkt an dem Radträger angeordnet sind, ist der oder sind die Borde demnach einteilig und einmaterialig mit dem Radträger ausgebildet. Die lnnenlaufbahn(en) ist/sind vorzugsweise an einem Außenring ausgebildet, der in den Radträger montiert wird. In diesem Fall ist jeder der Innenlaufbahnen jeweils ein Bord zugeordnet, wobei die Innenlaufbahnen vorzugsweise axial zwischen den Borden verlaufen, d.h. die großen Stirnflächen der einen Reihe Kegelrollen sind von den großen Stirnflächen der axial benachbart liegenden Reihe Kegelrollen abgewandt.This object is achieved in that the respective axial support assigned to an inner raceway is a flange formed in one piece with the inner raceway. If the inner raceway (s) are arranged directly on the wheel carrier, the or the rims are accordingly made in one piece and in one material with the wheel carrier. The inner raceway (s) is / are preferably formed on an outer ring which is mounted in the wheel carrier. In this case, each of the inner raceways is assigned a shelf, the inner raceways preferably running axially between the shelves, i.e. the large end faces of one row of tapered rollers face away from the large end faces of the axially adjacent row of tapered rollers.
Die Innenringe sind ohne Bord und somit einfacher zu bearbeiten. Die Bau- einheit ist einfach zu montieren. Die Anzahl der Einzelteile und somit der Montageaufwand ist reduziert.The inner rings are without a shelf and are therefore easier to machine. The unit is easy to assemble. The number of individual parts and thus the assembly effort is reduced.
Eine Ausgestaltung der Erfindung sieht das Radlager als eine Baueinheit vor, die komplett einem oder zwei Innenringen sowie mit oder ohne Nabe vormontiert in einen Radträger montierbar ist. Dazu weist das Radlager pro Innenring wenigstens eine Axialsicherung auf, die mit dem jeweiligen Innenring in einer Wirkverbindung steht. Die Axialsicherung schließt sich dazu seitens des kleinsten Durchmessers der Kegelrollen axial an die Kegelrollen an und steht mit dem Innenring in einem formschlüssigen Eingriff. Die Axial- Sicherung steht radial über den kleinsten Durchmesser der jeweiligen Außenlaufbahn an dem Innenring hinaus und steht so den Stirnflächen der Kegelrolle seitens des kleinsten Durchmessers der Kegelrollen axial gegenüber. Das Radlager kann vormontiert transportiert und gehandhabt werden, da die Axialsicherung durch den Kontakt mit den kleinen Stirnflächen der Kegelrollen die Kegelrollen und den Außen- und Innenring aneinander hält. Die Axialsicherung hält alternativ dazu die Einheit durch den axialen Kontakt mit einem Käfig anstelle des direkten Kontaktes mit den Stirnseiten , in dem die Kegelrollen geführt sind, aneinander. Die einfachste Form der Axialsicherung ist in diesem Fall ein Sicherungsring, der in eine Ringnut an dem Innenring eingreift.One embodiment of the invention provides the wheel bearing as a structural unit that can be completely assembled in a wheel carrier with one or two inner rings and with or without a hub pre-assembled. For this purpose, the wheel bearing has at least one axial securing device per inner ring, which is in operative connection with the respective inner ring. For this purpose, the axial lock connects axially to the tapered rollers on the side of the smallest diameter of the tapered rollers and is in positive engagement with the inner ring. The axial securing stands radially beyond the smallest diameter of the respective outer raceway on the inner ring and thus axially faces the end faces of the tapered roller on the part of the smallest diameter of the tapered rollers. The wheel bearing can be transported and handled pre-assembled, since the axial lock holds the tapered rollers and the outer and inner ring together by contact with the small end faces of the tapered rollers. The axial lock alternatively holds the unit together by axial contact with a cage instead of direct contact with the end faces in which the tapered rollers are guided. In this case, the simplest form of axial securing is a securing ring which engages in an annular groove on the inner ring.
Eine weitere Ausgestaltung der Erfindung sieht vor, dass die Axialsicherung direkt an einem Käfig für die Kegelrollen ausgebildet ist. In diesem Fall greift die Axialsicherung von dem Käfig aus in eine Ringnut des Innenringes formschlüssig ein. Eine derartige Axialsicherung ist beispielsweise eine oder sind vorzugsweise mehrere am Umfang des Käfigs aus Kunststoff angeordnete Schnappnassen, die beim Aufschieben des Käfigs mit den Wälzkörpern auf den Innenring auffedern und dann in eine entsprechende Ringnut am Innenring einfedern.Another embodiment of the invention provides that the axial lock is formed directly on a cage for the tapered rollers. In this case, the axial securing device engages in a form-fitting manner in an annular groove of the inner ring from the cage. Such an axial lock is, for example, one or are preferably a plurality of snap-in catches arranged on the circumference of the plastic cage, which spring open when the cage is pushed onto the inner ring with the rolling elements and then deflect into a corresponding annular groove on the inner ring.
Beschreibung der ZeichnungenDescription of the drawings
Figur 1 zeigt eine Radlagereinheit 1 , von der vorzugsweise zwei Radlagereinheiten 1 gegeneinander angestellt in einem nicht dargestellten Radträger verbaut sind. Die Radlagereinheit 1 weist einen Innenring 2 mit einer Außenlaufbahn 3 und einen Außenring 4 mit einer Innenlaufbahn 5 auf. Zwi- sehen dem Innenring 2 und dem Außenring 4 sind Kegelrollen 6 angeordnet, die an der Innenlaufbahn 5 und an der Außenlaufbahn 3 ablaufen. Die Kegelrollen 6 sind in einem Käfig 9 geführt. Der Außenring 4 weist einen Bord 7 auf, der einteilig mit dem Außenring 4 und somit einteilig mit der Innenlaufbahn 5 ausgebildet ist. Der Bord 7 ragt seitens des größten Innendurchmes- sers D, über die Innenlaufbahn 5 radial in Richtung der Rotationsachse 1a hinaus und liegt somit seitens des großen Durchmessers der Kegelrollen 6 der größten Stirnfläche 6a der Kegelrolle 6 gegenüber. Die Radlagereinheit 1 ist mittels der Axialsicherung 8 in Form von mehreren einteilig mit den Käfig 9 ausgebildeten Schnappnasen 9a in sich gehalten. Die Schnappnase 9a ist an der Seite des Käfigs 9 ausgebildet, die sich dem kleinen Durchmesser der Kegelrollen 6 anschließt. Die Axialsicherung 8 greift formschlüssig in eine Nut 2b des Innenringes 2 ein, die sich der Außenlaufbahn 3 an ihrem kleinsten Außendurchmesser Da anschließt. Der Außenring 4 weist außen eine zylindrische Mantelfläche 4a auf, die für den Sitz in dem nicht dargestellten Radträger vorgesehen ist. Der Innenring 2 ist mit einer Innenmantelfläche 2a für den Sitz auf einer nicht dargestellten Nabe versehen.FIG. 1 shows a wheel bearing unit 1, of which preferably two wheel bearing units 1 installed against one another are installed in a wheel carrier (not shown). The wheel bearing unit 1 has an inner ring 2 with an outer race 3 and an outer ring 4 with an inner race 5. Tapered rollers 6 are arranged between the inner ring 2 and the outer ring 4 and run on the inner race 5 and on the outer race 3. The tapered rollers 6 are guided in a cage 9. The outer ring 4 has a flange 7 which is formed in one piece with the outer ring 4 and thus in one piece with the inner race 5. The rim 7 protrudes from the largest inner diameter D, radially beyond the inner raceway 5 in the direction of the axis of rotation 1a, and is thus opposite from the large end face 6a of the tapered roller 6 due to the large diameter of the tapered rollers 6. The wheel bearing unit 1 is held in place by means of the axial securing means 8 in the form of a plurality of snap noses 9a formed in one piece with the cage 9. The snap lug 9a is formed on the side of the cage 9 which connects to the small diameter of the tapered rollers 6. The axial lock 8 engages in a form-fitting manner in a groove 2b of the inner ring 2, which adjoins the outer race 3 at its smallest outer diameter D a . The outer ring 4 has a cylindrical outer surface 4a, which is provided for the seat in the wheel carrier, not shown. The inner ring 2 is provided with an inner lateral surface 2a for the seat on a hub, not shown.
Figur 2 zeigt eine Radlagereinheit 10 mit zwei Reihen gegeneinander angestellten Kegelrollen 6. Die jeweils in einem Käfig 11 geführten Kegelrollen 6 sind im eingebauten Zustand mittels der Innenringe gegen einen gemeinsamen Außenring 13 vorgespannt. Die Vorspannung erfolgt in der Regel an einer nicht dargestellte Nabe, auf der die Innenringe 12 mit der Innenmantelfläche sitzen. Jeder der Innenringe 12 weist jeweils eine Außenlaufbahn 3 und der Außenring 13 zwei Innenlaufbahnen 5 auf. Zwischen dem Innenring 12 und dem Außenring 13 sind die Kegelrollen 6 angeordnet, die an der Innenlaufbahn 5 und an der Außenlaufbahn 3 ablaufen. Der Außenring 13 weist zwei der Borde 7 auf, von denen jede einteilig mit dem Außenring 13 und somit einteilig mit der jeweiligen Innenlaufbahn 5 ausgebildet ist. Jeder der Borde 7 ragt seitens des größten Innendurchmessers D. über die Innenlaufbahn 5 radial in Richtung der Rotationsachse 10a hinaus und liegt somit seitens des großen Durchmessers der Kegelrollen 6 der größten Stirnfläche 6a der Kegelrolle 6 gegenüber. Die Radlagereinheit 10 ist mittels der Axialsicherungen 8 in Form von Sicherungsringen 14 in sich gehalten. Jede der Axialsicherungen 8 sitzt formschlüssig in einer Nut 12b des jeweiligen Innenringes 12. Die Nuten 12b schließen sich der jeweiligen Außenlaufbahn 3 an ihrem kleinsten Außendurchmesser Da an. Der Außenring 13 weist außen eine zylindrische Mantelfläche 13a auf, die für den Sitz in dem nicht dargestellten Radträger vorgesehen ist. BezugszeichenFIG. 2 shows a wheel bearing unit 10 with two rows of tapered rollers 6 positioned against one another. The tapered rollers 6, each guided in a cage 11, are preloaded against a common outer ring 13 by means of the inner rings in the installed state. The preload is usually carried out on a hub, not shown, on which the inner rings 12 sit with the inner surface. Each of the inner rings 12 has an outer race 3 and the outer ring 13 has two inner races 5. Between the inner ring 12 and the outer ring 13, the tapered rollers 6 are arranged, which run on the inner race 5 and on the outer race 3. The outer ring 13 has two of the rims 7, each of which is formed in one piece with the outer ring 13 and thus in one piece with the respective inner race 5. Each of the ribs 7 protrudes radially beyond the inner raceway 5 in the direction of the axis of rotation 10a on the part of the largest inner diameter D. Thus, on the part of the large diameter of the tapered rollers 6, it lies opposite the largest end face 6a of the tapered roller 6. The wheel bearing unit 10 is held in place by means of the axial locks 8 in the form of locking rings 14. Each of the axial locks 8 sits in a form-fitting manner in a groove 12b of the respective inner ring 12. The grooves 12b adjoin the respective outer race 3 at their smallest outer diameter D a . The outer ring 13 has a cylindrical outer surface 13a, which is provided for the seat in the wheel carrier, not shown. reference numeral
Radlagereinheit 8 Axialsicherunga Rotationsachse 9 Käfig Innenring 9a Schnappnasea Innenmantelfläche 10 Radlagereinheitb Nut 10a Rotationsachse Außenlaufbahn 11 Käfig Außenring 12 Innenringa Außenmantelfläche 12a Innenmantelfläche Innenlaufbahn 12b Nut Kegelrolle 13 Außenringa Stirnfläche 13a Mantelfläche Bord 14 Sicherungsring Wheel bearing unit 8 Axial locka Rotation axis 9 Cage inner ring 9a Snap nose inner circumferential surface 10 Wheel bearing unitb Groove 10a Rotation axis outer raceway 11 Cage outer ring 12 Inner ringa Outer circumferential surface 12a Inner circumferential surface inner raceway 12b Groove tapered roller 13 Outer ringa Front surface 13a External surface board 14 Circlip

Claims

Patentansprüche claims
1. Radlagereinheit (1 , 10) mit wenigstens einer Innenlaufbahn (5) für Kegelrollen (6) und einer sich der Innenlaufbahn (5) anschließenden Axialstütze für Stirnflächen (6a) der Kegelrollen (6), wobei sich die A- xialstütze axial seitens des großen Durchmessers der Kegelrollen (6) an die Kegelrollen (6) anschließt und wobei die Axialstütze radial über den größten Innendurchmesser der Innenlaufbahn (5) hinausragt, dadurch gekennzeichnet, die Axialstütze ein einteilig mit der Innenlaufbahn (5) ausgebildeter Bord (7) ist.1. wheel bearing unit (1, 10) with at least one inner raceway (5) for tapered rollers (6) and an axial support adjoining the inner raceway (5) for end faces (6a) of the tapered rollers (6), the axial support being axially on the part of the Large diameter of the tapered rollers (6) adjoins the tapered rollers (6) and the axial support projects radially beyond the largest inner diameter of the inner raceway (5), characterized in that the axial support is a flange (7) formed in one piece with the inner raceway (5).
2. Radlagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Radlagereinheit (10) zwei der Innenlaufbahnen (5) und jeweils einen Bord (7) an jeder der Innenlaufbahnen (5) aufweist.2. Wheel bearing unit according to claim 1, characterized in that the wheel bearing unit (10) has two of the inner raceways (5) and in each case one flange (7) on each of the inner raceways (5).
3. Radlagereinheit nach Anspruch 2, dadurch gekennzeichnet, dass die Innenlaufbahnen (5) axial zwischen den Borden (7) verlaufen.3. Wheel bearing unit according to claim 2, characterized in that the inner raceways (5) extend axially between the rims (7).
4. Radlagereinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Innenlaufbahn (5) und der Bord (7) einteilig mit einem Außenring (4, 13) der Radlagereinheit (1 , 10) ausgebildet sind.4. Wheel bearing unit according to claim 1 or 2, characterized in that the inner raceway (5) and the rim (7) are integrally formed with an outer ring (4, 13) of the wheel bearing unit (1, 10).
5. Radlagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Radlagereinheit (1 , 10) wenigstens einen Innenring (2, 12) und ei- ne Axialsicherung (8) aufweist, wobei die Axialsicherung (8) sich seitens des kleinen Durchmessers der Kegelrollen (6) axial an die Kegelrollen (6) anschließt, und wobei die Axialsicherung (8) und der Innenring (2, 12) in einer formschlüssigen Wirkverbindung stehen.5. Wheel bearing unit according to claim 1, characterized in that the wheel bearing unit (1, 10) at least one inner ring (2, 12) and egg Ne has axial securing device (8), the axial securing device (8) adjoining the tapered rollers (6) axially on the part of the small diameter of the tapered rollers (6), and the axial securing device (8) and the inner ring (2, 12) in a form-fitting manner Active connection.
6. Radlagereinheit nach Anspruch 5, dadurch gekennzeichnet, dass die Axialsicherung (8) an dem Innenring (12) befestigt ist, wobei die Axialsicherung (8) zumindest radial über den kleinsten Außendurchmesser einer Außenlaufbahn (3) des Innenringes (12) hinausragt.6. Wheel bearing unit according to claim 5, characterized in that the axial securing device (8) is fastened to the inner ring (12), the axial securing device (8) projecting at least radially beyond the smallest outer diameter of an outer raceway (3) of the inner ring (12).
Radlagereinheit nach Anspruch 6, dadurch gekennzeichnet, dass die Radlagereinheit (10) einen Käfig (11) für die Kegelrollen (6) aufweist, wobei die Axialsicherung (8) dem Käfig (6) zumindest teilweise axial gegenüberliegt.Wheel bearing unit according to claim 6, characterized in that the wheel bearing unit (10) has a cage (11) for the tapered rollers (6), the axial securing means (8) being at least partially axially opposite the cage (6).
8. Radlagereinheit nach Anspruch 5, dadurch gekennzeichnet, dass die Radlagereinheit (1) einen Käfig (9) für die Kegelrollen (6) aufweist, wobei die Axialsicherung (8) an dem Käfig (9) ausgebildet ist und dabei die Axialsicherung (8) in eine Ringnut (2b) des Innenringes ein- greift.8. Wheel bearing unit according to claim 5, characterized in that the wheel bearing unit (1) has a cage (9) for the tapered rollers (6), the axial securing device (8) being formed on the cage (9) and the axial securing device (8) engages in an annular groove (2b) of the inner ring.
9. Radlagereinheit nach Anspruch 1 , dadurch gekennzeichnet, dass die Radlagereinheit (10) zwei Reihen der Kegelrollen (6), zwei der Innenringe (12) und zwei der Axialsicherungen (8) aufweist, wobei die Axialsicherungen (8) axial nebeneinander zwischen den Reihen angeordnet sind. 9. Wheel bearing unit according to claim 1, characterized in that the wheel bearing unit (10) has two rows of tapered rollers (6), two of the inner rings (12) and two of the axial locks (8), the axial locks (8) axially side by side between the rows are arranged.
EP05750299A 2004-05-29 2005-05-21 Tapered roller bearing for a wheel Withdrawn EP1751439A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004026457A DE102004026457A1 (en) 2004-05-29 2004-05-29 wheel bearing unit
PCT/DE2005/000937 WO2005116466A1 (en) 2004-05-29 2005-05-21 Tapered roller bearing for a wheel

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EP1751439A1 true EP1751439A1 (en) 2007-02-14

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ID=34969760

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EP05750299A Withdrawn EP1751439A1 (en) 2004-05-29 2005-05-21 Tapered roller bearing for a wheel

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US (1) US20080044121A1 (en)
EP (1) EP1751439A1 (en)
DE (1) DE102004026457A1 (en)
WO (1) WO2005116466A1 (en)

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US20080044121A1 (en) 2008-02-21
WO2005116466A1 (en) 2005-12-08

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