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DE3738529A1 - Seal for rolling bearings - Google Patents

Seal for rolling bearings

Info

Publication number
DE3738529A1
DE3738529A1 DE19873738529 DE3738529A DE3738529A1 DE 3738529 A1 DE3738529 A1 DE 3738529A1 DE 19873738529 DE19873738529 DE 19873738529 DE 3738529 A DE3738529 A DE 3738529A DE 3738529 A1 DE3738529 A1 DE 3738529A1
Authority
DE
Germany
Prior art keywords
bearing
ring
sealing
rolling
seal
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Withdrawn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
DE19873738529
Other languages
German (de)
Inventor
Hermann Schobbe
Peter Weymann
Harald M Heintz
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE19873738529 priority Critical patent/DE3738529A1/en
Publication of DE3738529A1 publication Critical patent/DE3738529A1/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Withdrawn legal-status Critical Current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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/005—Fluid passages not relating to lubrication or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00345—Details of the rotational joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00363—Details of sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • 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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7893—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a cage or integral therewith
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints

Landscapes

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

Abstract

The object is to specify a seal for rolling bearings which makes it possible to seal the annular gap between the inner and outer bearing races at least on one side of a rolling bearing cage, to arrange the sealing element provided for this purpose on the rolling bearing in such a way that it is protected from damage and to make a significant reduction in the sliding friction between the sealing element and the bearing races. For this purpose, the proposal is to arrange within the annular gap a sealing ring which rests sealingly against the adjacent circumferential surfaces of the inner and outer bearing races and to secure it to the rolling bearing cage.

Description

Die Erfindung betrifft eine Abdichtung für Wälzlager mit den Merkmalen des Oberbegriffes des Patentanspruches 1.The invention relates to a seal for rolling bearings the features of the preamble of claim 1.

Bei einem Wälzlager dieser Art (EP-OS 02 08 540) ist der den zwischen beiden Lagerringen vorhandene Ringspalt ver­ schließende Abdichtring an der Stirnseite des äußeren Lager­ ringes gehalten. Bei der Relativbewegung zwischen fest­ stehendem und rotierendem Lagerring entspricht dabei die die die Lebensdauer des Abdichtringes bestimmende Gleitge­ schwindigkeit desselben auf dem Außenumfang des inneren Lagerringes bei dessen Rotation seiner Umfangsgeschwindig­ keit und bei rotierendem äußeren Lagerring einer dessen Umfangsgeschwindigkeit entsprechenden Winkelgeschwindigkeit.In a rolling bearing of this type (EP-OS 02 08 540) is the ver the existing annular gap between the two bearing rings closing sealing ring on the face of the outer bearing held ring. With the relative movement between fixed standing and rotating bearing ring corresponds to the the sliding ring that determines the life of the sealing ring speed of the same on the outer circumference of the inner Bearing ring when rotating its circumferential speed speed and one of the rotating outer bearing rings Peripheral speed corresponding angular velocity.

Dabei umgreift der Abdichtring einen aus dem äußeren Lager­ ring herausragenden zylindrischen Ansatz des inneren Lager­ ringes. Der Abdichtring ist somit außerhalb des Wälzlagers angeordnet und kann leicht beschädigt werden.The sealing ring encompasses one from the outer bearing ring protruding cylindrical approach of the inner bearing ring. The sealing ring is therefore outside the rolling bearing arranged and can be easily damaged.

Der Erfindung liegt nun die Aufgabe zugrunde eine Abdichtung für Wälzlager in einer Ausbildung gemäß dem Oberbegriff des Patentanspruches 1 so zu verbessern, daß durch eine Herab­ setzung der Gleitgeschwindigkeit des Abdichtringes eine we­ sentliche Erhöhung seiner Lebensdauer sowie eine geschützte Unterbringung desselben im Wälzlager möglich ist.The invention is based on the object of a seal for rolling bearings in training according to the preamble of To improve claim 1 so that by a down  setting the sliding speed of the sealing ring a significant increase in its lifespan as well as a protected The same in the rolling bearing is possible.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.This object is achieved by the characterizing Features of claim 1 solved.

Die innerhalb des zwischen beiden Lagerringen vorhandenen Ringspaltes vorgesehene Anordnung des Abdichtringes er­ laubt dessen beschädigungssichere Unterbringung. Die Hal­ terung des Abdichtringes am Wälzlagerkäfig bringt es mit sich, daß beide Teile zwischen den Lagerringen gemeinsam umlaufen. Dabei macht sich die Erfindung den Vorteil zu­ nutze, daß Wälzlagerkäfige annähernd mit der halben Winkel­ geschwindigkeit des rotierenden Lagerringes umlaufen. Dies bedeutet, daß somit auch der Abdichtring mit Bezug auf die­ sen Lagerring nur ungefähr mit dessen halber Winkelge­ schwindigkeit umläuft. Zwischen Abdichtring und beiden Lagerringen stellen sich somit Relativgeschwindigkeiten ein, die dazu führen, daß der Abdichtring dem feststehen­ den Lagerring gegenüber entsprechend vor- und dem rotieren­ den Lagerring gegenüber entsprechend nacheilt. Demgemäß ent­ spricht die Differenz der Umfangsgeschwindigkeit zwischen feststehendem Lagerring und Abdichtring und zwischen ro­ tierendem Lagerring und Abdichtring jeweils etwa der Hälfte des Wertes der Umfangsgeschwindigkeit des rotierenden Lager­ ringes.The inside of the existing between the two bearing rings Annular gap provided arrangement of the sealing ring he leaves its damage-proof accommodation. The hal The sealing ring on the roller bearing cage brings it with it yourself that both parts between the bearing rings together circulate. The invention has the advantage use that roller bearing cages approximately at half the angle speed of the rotating bearing ring. This means that thus also the sealing ring with reference to the sen bearing ring only approximately with its half angular speed circulates. Between the sealing ring and both Bearing rings thus set relative speeds a, which lead to the fact that the sealing ring are fixed advance and rotate the bearing ring opposite accordingly lagging behind the bearing ring accordingly. Accordingly ent speaks the difference in peripheral speed between fixed bearing ring and sealing ring and between ro ting bearing ring and sealing ring each about half the value of the peripheral speed of the rotating bearing ring.

Ein weiterer Vorteil der erfindungsgemäßen Konstruktion be­ steht darin, daß Wälzlagerkäfig und Abdichtring zu einer kompletten Baueinheit vormontiert und somit bei Lagermon­ tage zugleich auch eine Montage des Abdichtringes innerhalb des Wälzlagers erfolgt. Desweiteren ist auch ein vorteil­ hafter Austausch von Wälzlagerkäfig und Abdichtring möglich.Another advantage of the construction according to the invention be is that the rolling bearing cage and sealing ring to one complete unit pre-assembled and thus in stock also assemble the sealing ring within of the rolling bearing. It is also an advantage  The roller bearing cage and sealing ring can be replaced.

Die erfindungsgemäße Abdichtung ist gleich vorteilhaft für ein- oder zweireihige, mit einem Wälzlagerkäfig ausgestattete Axial- oder Radialwälzlager geeignet.The seal according to the invention is equally advantageous for single or double row, equipped with a roller bearing cage Suitable for axial or radial roller bearings.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand von Unteransprüchen.Advantageous embodiments of the invention are the subject of subclaims.

Mit besonderem Vorteil eignet sich die erfindungsgemäße Ab­ dichtung für Wälzlager von Kraftfahrzeugrädern, deren Luft­ reifen an eine Reifendruckreguliereinrichtung angeschlossen und die Luft durch das Wälzlager hindurchzuführen ist. Hierfür ist es günstig, die Konstruktion solcher Wälzlager nach Patentanspruch 6 zu wählen.The Ab according to the invention is particularly advantageous Seal for rolling bearings of motor vehicle wheels, their air tires connected to a tire pressure regulating device and the air is to be passed through the rolling bearing. For this, it is convenient to design such bearings to choose according to claim 6.

Neben der Lagerabdichtung gemäß EP-OS 02 08 540, von der die Erfindung ausgeht, ist aus der DE-PS 26 56 733 eine Schutzvorrichtung für Wälzlager bekannt, die am Wälzlager­ käfig gehalten ist und in den zwischen äußerem und innerem Lagerring vorhandenen Ringspalt eingreift.In addition to the bearing seal according to EP-OS 02 08 540, by the the invention is based, is from DE-PS 26 56 733 Protection device for rolling bearings known on the rolling bearing is held in a cage and between the outer and inner Bearing ring engages existing annular gap.

Diese Schutzvorrichtung ist allerdings durch an den Wälzlager­ käfig angeformte, in den Ringspalt axial hineinragende, zun­ genartige und biegeelastische Ansätze gebildet, die vom Innen- und Außenumfang der Lagerringe einen geringen ra­ dialen Abstand haben. Diese Schutzvorrichtung vermag somit das Wälzlager stirnseitig nicht hermetisch zu verschließen und dient insbesondere dazu, die Entstehung von Schmutz­ krusten auf den Schultern der Lagerringe zu verhindern.However, this protective device is due to the rolling bearing integrally formed into the cage, projecting axially into the annular gap Genetic and flexible approaches formed by the The inner and outer circumference of the bearing rings a little ra have a distance. This protective device is therefore capable do not hermetically seal the rolling bearing face side and serves in particular to prevent the formation of dirt to prevent crusting on the shoulders of the bearing rings.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen: In the drawing is an embodiment of the invention shown. Show it:  

Fig. 1 einen Längsschnitt eines mit einer erfindungs­ gemäßen Dichtung ausgestatteten Wälzlagers, das beispielsweise für eine Reifendruckregulier­ einrichtung eines Kraftfahrzeuges konzipiert ist, Fig. 1 a longitudinal section of a vehicle equipped with a proper sealing Invention rolling bearing device, for example for a Reifendruckregulier of a motor vehicle is designed,

Fig. 2 einen Querschnitt des Wälzlagers, entlang der Linie II-II der Fig. 1 gesehen und Fig. 2 is a cross section of the rolling bearing, seen along the line II-II of Fig. 1 and

Fig. 3 einen vergrößerten Ausschnitt des vormontierten Wälzlagers. Fig. 3 shows an enlarged section of the preassembled rolling bearing.

Das in Fig. 1 gezeigte Wälzlager bildet ein an sich bekanntes, zweireihiges Schrägkugellager, dessen äußerer Lagerring mit 10 und dessen innerer Lagerring als Ganzes mit 12 bezeichnet ist. Jede Kugelreihe 14 bzw. 16 weist einen eigenen, ein­ teiligen Kugelkäfig 18 bzw. 20 zur Führung der Lagerkugeln 22 bzw. 24 auf. Zum Zwecke der Montage des Schrägkugellagers ist der innere Lagerring 12 in der Mitte des Abstandes der beiden Kugelreihen voneinander geteilt ausgeführt. Die bei­ den Ringteile sind mit 12′ und 12′′ bezeichnet.The rolling bearing shown in FIG. 1 forms a double row angular contact ball bearing known per se, the outer bearing ring of which is designated by 10 and the inner bearing ring of which is designated as a whole by 12 . Each row of balls 14 and 16 has its own one-piece ball cage 18 and 20 for guiding the bearing balls 22 and 24, respectively. For the purpose of assembling the angular contact ball bearing, the inner bearing ring 12 is divided in the middle of the distance between the two rows of balls. The ring parts are designated 12 ' and 12'' .

Beiden Kugelreihen 14, 16 ist jeweils eine Abdichtung 26 bzw. 28 zugeordnet, die in den zwischen den Lagerringen 10 und 12 vorhandenen Abschnitten 30′ bzw. 30′′ eines Ring­ spaltes 30 angeordnet sind und dazu dienen, die beiden Kugelreihen 14, 16 gegenüber einer radial verlaufenden Luftpassage durch das Schrägkugellager abzudichten, wo­ durch verhindert werden soll, daß im Luftstrom mitgeführte Staub- und Schmutzpartikel ins Lagerinnere bzw. zu den Kugelreihen 14 bzw. 16 gelangen können. Diese Luftpassage ist gemäß Fig. 2 beispielsweise durch einen im äußeren Lagering 10 vorgesehenen und in der Trennebene a-a des inneren Lagerringes 12 liegenden Radialkanal 32 und bei­ spielsweise einander diametral gegenüber liegende, zum Radialkanal 32 um 90° versetzte Radialkanäle 34 und 36 im inneren Lagerring 12 gebildet, auf deren Zweck weiter unten im Zusammenhang mit der Erläuterung der Fig. 3 näher eingegangen wird.Both rows of balls 14 , 16 are each assigned a seal 26 and 28 , which are arranged in the sections 30 'and 30 ''between the bearing rings 10 and 12 ' of an annular gap 30 and serve to serve the two rows of balls 14 , 16 opposite to seal a radial air passage through the angular contact ball bearing, where it is to be prevented that dust and dirt particles entrained in the air flow can get into the bearing interior or to the rows of balls 14 or 16 . This air passage is shown in FIG. 2, for example by a provided in the outer bearing ring 10 and in the parting plane of the inner bearing ring aa 12 radial channel lying 32 and at play as diametrically opposite, offset to the radial passage 32 by 90 ° radial passages 34 and 36 in the inner bearing ring 12 formed, the purpose of which is discussed in more detail below in connection with the explanation of FIG. 3.

Die Abdichtungen 26 und 28 sind jeweils an einem vorzugsweise aus Metall bestehenden Kugelkäfige 18 bzw. 20 fest angebracht, wobei jede einen vorzugsweise aus einem Elastomer be­ stehenden Abdichtring 38 bzw. 40 aufweist. Diese sind an die Kugelkäfige 18, 20 vorzugsweise anvulkanisiert und im Quer­ schnitt gegabelt und öffnen sich in Achsrichtung des Schräg­ kugellagers V-förmig. Die dadurch gebildeten Gabelschenkel 42 und 44 sind im Bereich ihres freien Schenkelendes vorzugs­ weise nach innen abgewinkelt und bilden dadurch an ihrer Außenseite wenigstens eine ringförmige Dichtkante 46 bzw. 48, die an der benachbarten Innen- bzw. Außenumfangsfläche 50 bzw. 52 der Lagerringe 10 und 12 abdichtend anliegt.The seals 26 and 28 are each firmly attached to a ball cage 18 or 20 , preferably made of metal, each having a sealing ring 38 or 40 , preferably made of an elastomer. These are preferably vulcanized to the ball cages 18 , 20 and forked in cross section and open in the axial direction of the oblique ball bearing in a V-shape. The fork legs 42 and 44 formed in this way are preferably angled inwards in the region of their free leg ends and thereby form on their outside at least one annular sealing edge 46 or 48 , which on the adjacent inner or outer peripheral surface 50 or 52 of the bearing rings 10 and 12 rests sealingly.

54 und 56 bezeichnen zwischen die Gabelschenkel 42 und 44 eingesetzte, ringförmige Spreizglieder, von denen jedes einen der Gabelschenkel radial aufweitet, um die notwendige, ein zuverlässiges abdichtendes Anliegen der Dichtkanten 46 und 48 gewährleistende, radial gerichtete Anpreßkraft zu erzeugen. Die Abdichtung des Ringspaltes 30 an den Stirnenden des Schrägkugellagers erfolgt konventionell mittels üblicher Abdichtringe 45 und 47; es ist aber auch denkbar, hierfür an den Kugelkäfigen 18 und 20 nochmals Abdichtringe gemäß der Erfindung vorzusehen. 54 and 56 denote between the fork legs 42 and 44 inserted, annular expansion members, each of which radially expands one of the fork legs in order to generate the necessary, radially directed contact pressure, which ensures a reliable sealing contact of the sealing edges 46 and 48 . The sealing of the annular gap 30 at the ends of the angular contact ball bearing is carried out conventionally by means of conventional sealing rings 45 and 47 ; but it is also conceivable to provide sealing rings according to the invention again on the ball cages 18 and 20 .

Das mit der radialen Luftpassage ausgestattete Schräg­ kugellager ist beispielsweise zur Lagerung eines Kraft­ fahrzeugrades bestimmt, dessen Reifeninnendruck durch eine Reifendruckregeleinrichtung insbesondere während der Fahrt veränderbar ist. Eine Möglichkeit einer rad­ seitigen Luftpassage einer solchen Regeleinrichtung ist beispielsweise in der DE-OS 35 42 851 veranschaulicht.The slant with the radial air passage ball bearing is for example for storing a force vehicle wheel determines whose tire pressure by a tire pressure control device especially during the journey is changeable. One way of a bike side air passage of such a control device illustrated for example in DE-OS 35 42 851.

Ein möglicher Einbau des Schrägkugellagers in ein solches Kraftfahrzeugrad ist in Fig. 3 veranschaulicht. Der äußere Lagerring 10 ist beispielsweise in ein Lagergehäuse 54 eines Radträgers eingesetzt und der innere Lagerring 12 auf einer Radnabe 56 des Kraftfahrzeugrades angeordnet.A possible installation of the angular contact ball bearing in such a motor vehicle wheel is illustrated in FIG. 3. The outer bearing ring 10 is inserted, for example, into a bearing housing 54 of a wheel carrier and the inner bearing ring 12 is arranged on a wheel hub 56 of the motor vehicle wheel.

Durch das Lagergehäuse 54 und die Radnabe 56 erstreckt sich jeweils ein Luftführungskanal 58 bzw. 60, wobei der das Lagergehäuse 54 durchdringende - 58 - an einen mit einer bord-eigenen Reifendruckregeleinrichtung verbundenen Ver­ sorgungskanal und an dem in der Radnabe 56 verlaufenden - 60 - eine zum Luftreifen des Kraftfahrzeugrades führende Verbindungsleitung angeschlossen ist. Beide Luftführungs­ kanäle 58 und 60 befinden sich in der Trennebene a-a des inneren Lagerringes 12, wobei seitlich derselben beide Lagerringe 10 und 12 am Umfang vorzugsweise noch einen in eine Umfangsnut 62 bzw. 64 eingesetzten Dichtring 66 bzw. 68 tragen.Through the bearing housing 54 and the wheel hub 56 extends an air duct 58 and 60 , respectively, which penetrates the bearing housing 54 - 58 - to a supply channel connected to an on-board tire pressure control device and to the one running in the wheel hub 56 - 60 - one connecting line leading to the pneumatic tire of the motor vehicle wheel is connected. Both air guide channels 58 and 60 are located in the parting plane aa of the inner bearing ring 12 , laterally the same bearing rings 10 and 12 on the circumference preferably still wear a sealing ring 66 and 68 inserted in a circumferential groove 62 and 64 , respectively.

Während des Radlaufes rotieren die Abdichtringe 38 und 40 zusammen mit den Kugelkäfigen 18 und 20 mit einer Winkel­ geschwindigkeit, die annäherend der Hälfte der Umfangsge­ schwindigkeit des mit der Radnabe 56 umlaufenden inneren Lagerringes 12 entspricht.During the wheel arch, the sealing rings 38 and 40 rotate together with the ball cages 18 and 20 at an angular speed which corresponds approximately to half the speed of the circumference of the inner bearing ring 12 rotating with the wheel hub 56 .

Claims (6)

1. Abdichtung für Wälzlager mit einem zwischen einem äußeren und einem inneren Lagerring laufenden, Wälz­ körper führenden Wälzlagerkäfig, die einen an einem Teil des Wälzlagers gehaltenen, den zwischen beiden Lagerringen vorhandenen Ringspalt ver­ schließenden Abdichtring aufweist, der am Außenumfang des inneren Lagerringes abdichtend anliegt, dadurch gekennzeichnet, daß der Abdichtring (38 bzw. 49) am Wälzlagerkäfig (18 bzw. 20) gehalten, innerhalb des Ringspaltes (30) angeordnet und mit dem Innenumfang (50) des äußeren Lagerringes (10) abdichtend in Berührung ist.1. Sealing for rolling bearings with a rolling body cage running between an outer and an inner bearing ring, which has a part held on a part of the rolling bearing, the annular gap between the two bearing rings ver closing sealing ring, which rests sealingly on the outer circumference of the inner bearing ring, characterized in that the sealing ring ( 38 or 49 ) is held on the roller bearing cage ( 18 or 20 ), is arranged within the annular gap ( 30 ) and is in sealing contact with the inner circumference ( 50 ) of the outer bearing ring ( 10 ). 2. Abdichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abdichtring (38 bzw. 40) im Querschnitt gegabelt ist, und dessen Gabelschenkel (42 und 44) an jeweils einem der Lagerringe (10 oder 12) abdichtend anliegen. 2. Seal according to claim 1, characterized in that the sealing ring ( 38 or 40 ) is bifurcated in cross section, and the fork legs ( 42 and 44 ) in each case sealingly bear against one of the bearing rings ( 10 or 12 ). 3. Abdichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Abdichtring (38 bzw. 40) im Querschnitt V-förmig ist und daß dessen Gabelschenkel (42 und 44) mittels we­ nigstens eines zwischen diese eingebrachten ringförmigen Spreizgliedes (54 bzw. 56) gespreizt sind.3. Seal according to claim 2, characterized in that the sealing ring ( 38 or 40 ) is V-shaped in cross section and that its fork legs ( 42 and 44 ) by means of we at least one introduced between them annular expansion member ( 54 and 56 ) spread are. 4. Abdichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Gabelschenkel (42 und 44) außenseitig mit jeweils wenigstens einer Ringkante (46 bzw. 48) am benachbarten Lagerring (10 bzw. 12) anliegen.4. Sealing according to claim 2 or 3, characterized in that the fork legs ( 42 and 44 ) lie on the outside with at least one ring edge ( 46 or 48 ) on the adjacent bearing ring ( 10 or 12 ). 5. Abdichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Wälzlagerkäfig an beiden Stirnseiten einen Abdicht­ ring aufweist.5. Sealing according to one of the preceding claims, characterized, that the roller bearing cage has a seal on both ends has ring. 6. Abdichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Wälzlager ein zweireihiges Schrägkugellager ist, dessen äußerer und innerer Lagerring (10 und 12) zwischen den beiden Kugelkäfigen (18 und 20) jeweils von mindestens einem Radialkanal (34 oder 36) durchsetzt sind und daß die Kugelkäfige (18 und 20) zumindest an ihren einander gegen­ überliegenden Stirnseiten jeweils einen Abdichtring (38 bzw. 40) tragen, die vor der die Radialkanäle (32, 34, 36) aufweisenden Radialebene (a-a) enden.6. Seal according to one of the preceding claims, characterized in that the rolling bearing is a double row angular contact ball bearing, the outer and inner bearing ring ( 10 and 12 ) between the two ball cages ( 18 and 20 ) each penetrated by at least one radial channel ( 34 or 36 ) and that the ball cages ( 18 and 20 ) each have a sealing ring ( 38 or 40 ) at least on their opposite ends, which end in front of the radial channels ( 32 , 34 , 36 ) having the radial plane (aa) .
DE19873738529 1987-11-13 1987-11-13 Seal for rolling bearings Withdrawn DE3738529A1 (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947202A1 (en) * 1999-10-01 2001-04-05 Audi Ag Seal for shaft passing through housing and mounted in low friction bearing comprises sealing ring with lip which cooperates with intermediate ring and second shaft sealing ring connected to bearing with lip which cooperates with shaft
DE10308702A1 (en) * 2003-02-28 2004-09-09 Audi Ag Sealing system in double roller bearing for separating two oil chambers in road vehicle gearbox has ring with two inner and two outer lips facing in two directions and engaging bearing races
US6896413B2 (en) 2002-05-31 2005-05-24 Skf Industrie S.P.A. Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system
FR2862570A1 (en) * 2003-11-21 2005-05-27 Skf Ind Spa Suspension standard for vehicle with air supply system, has passages for establishing fluid communication between inner cavity and hub bearing unit, and between inner cavity and pressurized air source
FR2863024A1 (en) * 2003-11-27 2005-06-03 Skf Ind Spa Bearing unit for wheel hub of vehicle has second radial inner air passage with surface which is inclined forwards with regard to direction of rotation to assist flow of air from intermediate chamber through second air passage
FR2862908A1 (en) * 2003-11-27 2005-06-03 Skf Ind Spa Bearing unit for vehicle's wheel hub with facility for tire inflation has annular intermediate element installed axially between inner half running tracks and at least partially defines second air passage
US6955201B2 (en) 2002-05-24 2005-10-18 Skf Industrie S.P.A. System for supplying pressurized air to a vehicle tire through the hub of the wheel
US6976789B2 (en) 2002-03-06 2005-12-20 Skf Industrie S.P.A. Device for supplying pressurized air through the hub to the tire of a motor vehicle wheel
EP1671816A1 (en) 2004-12-15 2006-06-21 Aktiebolaget SKF A bearing unit for the hub of a motor vehicle wheel
US7086784B2 (en) 2002-05-31 2006-08-08 Skf Industrie S.P.A. Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system
WO2007090361A1 (en) * 2006-02-10 2007-08-16 Schaeffler Kg Seal arrangement for a tyre pressure-regulating device
DE102006036006A1 (en) * 2006-08-02 2008-02-07 Schaeffler Kg Sealed rolling bearing
US20100308594A1 (en) * 2008-07-17 2010-12-09 Mitsubishi Heavy Industries, Ltd. Bearing structure and wind turbine generator
DE102015208933A1 (en) * 2015-05-13 2016-11-17 Aktiebolaget Skf Rolling bearing cage with a sealing element and method for its production
DE102020212070A1 (en) * 2019-10-31 2021-05-06 Deere & Company MECHANICAL SEAL DEVICE AND ARRANGEMENT OF A MECHANICAL SEAL DEVICE IN AN AXLE SUPPORT
IT201900024670A1 (en) * 2020-01-02 2021-07-02 Skf Ab WHEEL HUB ASSEMBLY WITH INTEGRATED SEAL

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DE1030629B (en) * 1955-09-15 1958-05-22 Kurt Faedler One-sided roller bearing seal
DE1905766A1 (en) * 1968-02-08 1970-08-20 Torrington Co Roller bearing
US3743368A (en) * 1968-02-02 1973-07-03 Garrett Corp Sealed bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030629B (en) * 1955-09-15 1958-05-22 Kurt Faedler One-sided roller bearing seal
US3743368A (en) * 1968-02-02 1973-07-03 Garrett Corp Sealed bearing
DE1905766A1 (en) * 1968-02-08 1970-08-20 Torrington Co Roller bearing

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947202A1 (en) * 1999-10-01 2001-04-05 Audi Ag Seal for shaft passing through housing and mounted in low friction bearing comprises sealing ring with lip which cooperates with intermediate ring and second shaft sealing ring connected to bearing with lip which cooperates with shaft
US6976789B2 (en) 2002-03-06 2005-12-20 Skf Industrie S.P.A. Device for supplying pressurized air through the hub to the tire of a motor vehicle wheel
US6955201B2 (en) 2002-05-24 2005-10-18 Skf Industrie S.P.A. System for supplying pressurized air to a vehicle tire through the hub of the wheel
US7086784B2 (en) 2002-05-31 2006-08-08 Skf Industrie S.P.A. Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system
US6896413B2 (en) 2002-05-31 2005-05-24 Skf Industrie S.P.A. Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system
US7220058B2 (en) 2002-05-31 2007-05-22 Skf Industrie S.P.A. Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system
DE10308702A1 (en) * 2003-02-28 2004-09-09 Audi Ag Sealing system in double roller bearing for separating two oil chambers in road vehicle gearbox has ring with two inner and two outer lips facing in two directions and engaging bearing races
FR2862570A1 (en) * 2003-11-21 2005-05-27 Skf Ind Spa Suspension standard for vehicle with air supply system, has passages for establishing fluid communication between inner cavity and hub bearing unit, and between inner cavity and pressurized air source
FR2862908A1 (en) * 2003-11-27 2005-06-03 Skf Ind Spa Bearing unit for vehicle's wheel hub with facility for tire inflation has annular intermediate element installed axially between inner half running tracks and at least partially defines second air passage
FR2863024A1 (en) * 2003-11-27 2005-06-03 Skf Ind Spa Bearing unit for wheel hub of vehicle has second radial inner air passage with surface which is inclined forwards with regard to direction of rotation to assist flow of air from intermediate chamber through second air passage
EP1671816A1 (en) 2004-12-15 2006-06-21 Aktiebolaget SKF A bearing unit for the hub of a motor vehicle wheel
CN101378917B (en) * 2006-02-10 2010-12-22 谢夫勒两合公司 Seal arrangement for a tyre pressure-regulating device
WO2007090361A1 (en) * 2006-02-10 2007-08-16 Schaeffler Kg Seal arrangement for a tyre pressure-regulating device
US7997316B2 (en) 2006-02-10 2011-08-16 Schaeffler Kg Seal arrangement for a tire pressure-regulating device
DE102006036006A1 (en) * 2006-08-02 2008-02-07 Schaeffler Kg Sealed rolling bearing
US20100308594A1 (en) * 2008-07-17 2010-12-09 Mitsubishi Heavy Industries, Ltd. Bearing structure and wind turbine generator
DE102015208933A1 (en) * 2015-05-13 2016-11-17 Aktiebolaget Skf Rolling bearing cage with a sealing element and method for its production
DE102020212070A1 (en) * 2019-10-31 2021-05-06 Deere & Company MECHANICAL SEAL DEVICE AND ARRANGEMENT OF A MECHANICAL SEAL DEVICE IN AN AXLE SUPPORT
US11226040B2 (en) 2019-10-31 2022-01-18 Deere & Company Rotary seal apparatus and arrangement of a rotary seal apparatus in an axle support system
IT201900024670A1 (en) * 2020-01-02 2021-07-02 Skf Ab WHEEL HUB ASSEMBLY WITH INTEGRATED SEAL
US11378129B2 (en) 2020-01-02 2022-07-05 Aktiebolaget Skf Wheel bearing assembly with integrated seal
US11808302B2 (en) 2020-01-02 2023-11-07 Aktiebolaget Skf Wheel bearing assembly with integrated seal

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