WO2007109818A1 - Rotary leadthrough within a wheel bearing unit - Google Patents

Rotary leadthrough within a wheel bearing unit Download PDF

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Publication number
WO2007109818A1
WO2007109818A1 PCT/AT2007/000129 AT2007000129W WO2007109818A1 WO 2007109818 A1 WO2007109818 A1 WO 2007109818A1 AT 2007000129 W AT2007000129 W AT 2007000129W WO 2007109818 A1 WO2007109818 A1 WO 2007109818A1
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WO
WIPO (PCT)
Prior art keywords
wheel bearing
bearing part
bearing
air passages
wheel
Prior art date
Application number
PCT/AT2007/000129
Other languages
German (de)
French (fr)
Inventor
Gerhard Skoff
Heinz Milchrahm
Franz Prendl
Original Assignee
Steyr-Daimler-Puch Spezialfahrzeug Gmbh
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 Steyr-Daimler-Puch Spezialfahrzeug Gmbh filed Critical Steyr-Daimler-Puch Spezialfahrzeug Gmbh
Publication of WO2007109818A1 publication Critical patent/WO2007109818A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • 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
    • F16C19/185—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 with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • 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
    • 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

  • the invention relates to a rotary feedthrough within a wheel bearing unit for a Reifenhell- or tire pressure control system for motor vehicles, consisting of an inner bearing part, an outer bearing part, two Radlagerkugelkränzen and two air passages.
  • a bearing unit of a vehicle wheel equipped with a tire inflation system is known from DE 10323449, DE 10324410 or from EP 0713021, wherein two seals are placed on the outer spherical shell between the two ball raceways, the air passage introduced into the outer spherical shell being symmetrical Seal the two-part inner half-shells.
  • the sealing lips of the integrated seals are lubricated by the permanent lubrication of the bearings. Without this lubrication, the sealing lips would wear after a short period of time and could no longer fulfill their sealing function.
  • it is not possible to integrate a second air passage in the bearing since the seal between the two air passages can not be lubricated and would therefore fail after a short period of operation.
  • stiffness requirements limit the constructive width of the bearing unit. A second air passage would widen the bearing halves to the extent that only large amounts of material would allow for the required stiffness of the wide bearing ring, which in practice would in many cases prevent its application due to the limited space and weight conditions.
  • the present invention has set itself the task of allowing two separate pneumatic air ducts within the two bearing surfaces of an integrated wheel bearing, and at the same time to increase the bearing stiffness without significant additions of material.
  • the inner bearing part consists of at least two parts
  • the outer bearing part consists of at least two parts and between the two Radlagerkugelkränzen two outwardly to the Radlagerkugelkränzen and each other by means of radial seals sealed air passages exist.
  • the entire width of the Radlager- sealing unit for a Reifenhell- or tire pressure control system in two-wire design, as e.g. in AT 408 867 B is to be reduced to a minimum, and at the same time a stiffening of the wheel bearing can be achieved, since the span of the two bearing races is increased.
  • the main sealing direction is to the open side of the sealing ring, that is, that the open side of the Radial shaft seal 11 must be directed to the pressure side of the air passage.
  • the radial shaft seal 11 between the two air passages 7 and 8 would consist of two individual mirror-symmetrical radial shaft seals, which have aligned the respective open side in the direction of the respective air passage. If it is ensured in the context of the function of the tire filling device that there is always an equal pressure gradient between the air passages 7 and 8, as shown in Fig.
  • the radial shaft seal 11 may also have only one radial shaft sealing ring, its open side in the direction has aligned the higher pressure. In the manner shown in Fig. 1 would always prevail in the air passage 8, a higher pressure than in the air passage 7. Such simplification brings not only cost advantages but also significant advantages in the space design with it.
  • the inner bearing part is divided into at least two parts 1 and 2, wherein in a preferred embodiment, as shown in Fig. 1, the part 1 is formed as the inner part of the wheel hub.
  • the part 1 must be surface hardened only in the area of the bearing raceway and in the area of the seal running surfaces.
  • the second part 2 of the inner bearing part is plugged and slidable in the axial direction on the first part 1, so that the play of the bearing is set in a known manner and, for example can be fixed by means of a not shown here nut.
  • the lubrication of the two air passages 7 and 8 of the rotary feedthrough separating radial shaft seal 11 is similar to that described in EP 1 141 595.
  • at least one transverse bore 15 is provided in part 1 in the axial direction; from this leads at least one radial bore 13 to a cavity 20 which is formed by the roof-shaped design of the two air passages 7 and 8 against each other sealing radial shaft seal 11, and over which the seal running surface of the radial shaft seal 11 can be lubricated.
  • the two axially outer radial seals 9 and 10 are formed with a roof-shaped annular gap 21, 22 on the sealing surface, and are analogous to the radial shaft seal 11 via Radial holes 12 and 14 and the axial transverse bore 15 supplied with lubricant. Thus they are independent of the lubricant supply of j wheel bearing ball races 3 and 4.
  • the outer bearing shell consists of at least two parts 5 and 6.
  • the one bearing shell part 6 carries the seals 9, 10 and 11 and is at the same time designed as an outer wheel hub to make the wheel bearing with as few individual components.
  • the air flow takes place via the bores 16 and 17 in the outer hub part 6 through the air passages 7, 8 and via bores 18 and 19 in the inner hub part.
  • the ends of the air bores 16, 17, 18, 19 can be provided in a further consequence with connecting pieces or sealing surfaces, not shown here.

Abstract

A rotary leadthrough within a wheel bearing unit for a tyre filling system or tyre pressure regulating system for motor vehicles comprises an inner bearing part (1), an outer bearing part (6), two wheel bearing ball races (3, 4) and two air passages (7, 8). The inner bearing part comprises at least two parts (1, 2) and the outer bearing part comprises at least two parts (5, 6). Two air passages (7, 8) which are sealed to the outside with respect to the wheel bearing ball races (3, 4) and with respect to one another by means of radial seals (9, 10, 11) are arranged between the two wheel bearing ball races (3, 4). An improved rotary leadthrough is achieved as a result.

Description

Drehdurchführung innerhalb einer Radlagereinheit Rotary feedthrough within a wheel bearing unit
Die Erfindung bezieht sich auf eine Drehdurchführung innerhalb einer Radlagereinheit für eine Reifenfüll- oder Reifendruckregelanlage für Kraftfahrzeuge, bestehend aus einem inneren Lagerteil, einem äußeren Lagerteil, zwei Radlagerkugelkränzen und zwei Luftpassagen.The invention relates to a rotary feedthrough within a wheel bearing unit for a Reifenfüll- or tire pressure control system for motor vehicles, consisting of an inner bearing part, an outer bearing part, two Radlagerkugelkränzen and two air passages.
Aus der DE 10323449, der DE 10324410 oder aus der EP 0713021 ist jeweils eine Lagereinheit eines mit einem Reifenaufpumpsystem ausgestatteten Fahrzeugrades bekannt, wobei zwischen den beiden Kugellaufbahnen zwei Dichtungen auf der äußeren Kugelschale eingebracht sind, die eine in die äußere Kugelschale eingebrachte Luftpassage gegen die symmetrisch zweigeteilten Innenhalbschalen abdichten.A bearing unit of a vehicle wheel equipped with a tire inflation system is known from DE 10323449, DE 10324410 or from EP 0713021, wherein two seals are placed on the outer spherical shell between the two ball raceways, the air passage introduced into the outer spherical shell being symmetrical Seal the two-part inner half-shells.
Eine ähnliche Einrichtung ist z.B. in der EP 0656267 beschrieben. Dabei liegen im Wesentlichen die Dichtungen auf den inneren Kugelhalbschalen an schrägen Flächen an, um die Dichtwirkung zu verbessern.A similar device is e.g. described in EP 0656267. Essentially, the gaskets on the inner spherical half-shells abut inclined surfaces in order to improve the sealing effect.
Bei den Lösungen gemäß dem Stand der Technik werden die Dichtlippen der integrierten Dichtungen durch die Dauerschmierung der Lager mitgeschmiert. Ohne diese Schmierung würden die Dichtlippen bereits nach kurzer Laufzeit verschleißen und könnten ihre Dichtfunktion nicht mehr erfüllen. Bei einer derartigen Ausführung ist es nicht möglich, eine zweite Luftpassage in das Lager zu integrieren, da die Abdichtung zwischen den beiden Luftpassagen nicht geschmiert werden kann und daher nach kurzer Betriebsdauer versagen würde. Darüber hinaus begrenzen Steifigkeitsforderungen die konstruktive Breite der Lagereinheit. Eine zweite Luftpassage würde die Lagerhälften soweit verbreitern, dass nur große Materialzugaben die erforderliche Steifigkeit des breiten Lagerringes ermöglichen würden, was in der Praxis in vielen Fällen die Anwendung aufgrund der begrenzten Verhältnisse sowohl in Bezug auf Raum als auch auf Gewicht verhindern würde.In the solutions according to the prior art, the sealing lips of the integrated seals are lubricated by the permanent lubrication of the bearings. Without this lubrication, the sealing lips would wear after a short period of time and could no longer fulfill their sealing function. In such an embodiment, it is not possible to integrate a second air passage in the bearing, since the seal between the two air passages can not be lubricated and would therefore fail after a short period of operation. In addition, stiffness requirements limit the constructive width of the bearing unit. A second air passage would widen the bearing halves to the extent that only large amounts of material would allow for the required stiffness of the wide bearing ring, which in practice would in many cases prevent its application due to the limited space and weight conditions.
Aus der EP 1 141 595 ist eine Lösung für die Schmierung einer Drehdurchführung in einer Radnabe mit zwei Luftpassagen bekannt. Dabei wird im Wesentlichen im Nabenteil Schmierfett über Bohrungen der Dichtstelle zugeführt. Bei den bekannten Anwendungen ist eine derartige Lösung wirtschaftlich nicht durchführbar, da die Lagerlaufschalen aus gehärtetem Stahl mit relativ geringen Wandstärken bestehen und die erforderlichen Längs- und Querbohrungen nicht in einfacher Weise eingebracht werden können.From EP 1 141 595 a solution for the lubrication of a rotary feedthrough in a wheel hub with two air passages is known. In this case, grease is supplied via holes of the sealing point substantially in the hub part. In the known Applications such a solution is not feasible economically, since the bearing shells made of hardened steel with relatively low wall thicknesses and the required longitudinal and transverse bores can not be introduced in a simple manner.
Die vorliegende Erfindung hat sich zur Aufgabe gestellt, innerhalb der beiden Lagerlaufflächen eines integrierten Radlagers zwei voneinander getrennte pneumatische Luftdurchführungen zu ermöglichen, und gleichzeitig die Lagersteifigkeit ohne nennenswerte Materialzugaben zu erhöhen.The present invention has set itself the task of allowing two separate pneumatic air ducts within the two bearing surfaces of an integrated wheel bearing, and at the same time to increase the bearing stiffness without significant additions of material.
Erreicht wird dies dadurch, dass der innere Lagerteil aus zumindest zwei Teilen besteht, und der äußere Lagerteil aus zumindest zwei Teilen besteht und zwischen den beiden Radlagerkugelkränzen zwei nach außen zu den Radlagerkugelkränzen und zueinander mittels Radialdichtungen abgedichtete Luftpassagen bestehen.This is achieved in that the inner bearing part consists of at least two parts, and the outer bearing part consists of at least two parts and between the two Radlagerkugelkränzen two outwardly to the Radlagerkugelkränzen and each other by means of radial seals sealed air passages exist.
Durch die vorgeschlagene Lösung kann die gesamte Breite der Radlager- Dichtungseinheit für eine Reifenfüll- oder Reifendruckregelanlage in Zweileiterausführung, wie sie z.B. in AT 408 867 B beschrieben ist, auf ein Minimum reduziert werden, und gleichzeitig eine Versteifung der Radlagerung erreicht werden, da die Stützweite der beiden Lagerlaufbahnen vergrößert wird.By the proposed solution, the entire width of the Radlager- sealing unit for a Reifenfüll- or tire pressure control system in two-wire design, as e.g. in AT 408 867 B is to be reduced to a minimum, and at the same time a stiffening of the wheel bearing can be achieved, since the span of the two bearing races is increased.
Eine beispielhafte Ausführung der vorgeschlagenen Erfindung ist nachfolgend beschrieben und in der Zeichnung dargestellt, die einen Schnitt durch ein erfindungsgemäßes Radlager wiedergibt.An exemplary embodiment of the proposed invention is described below and illustrated in the drawing, which shows a section through a wheel bearing according to the invention.
Zwischen den Lagerlaufbahnen der beiden Radlagerkugelkränze 3, 4 sind zwei Luftpassagen 7, 8 angeordnet, die jeweils axial nach außen mittels eines Radial wellendichtringes 9 und 10 zu den Radlagerkugelkränzen 3, 4 abgedichtet sind. Die beiden Luftpassagen 7, 8 sind durch eine Radialwellendichtung 11 pneumatisch getrennt.Between the bearing races of the two Radlagerkugelkränze 3, 4 two air passages 7, 8 are arranged, which are each sealed axially outward by means of a radial shaft sealing ring 9 and 10 to the Radlagerkugelkränzen 3, 4. The two air passages 7, 8 are pneumatically separated by a radial shaft seal 11.
Es liegt in der Eigenheit von Radialwellendichtringen, dass die Hauptdichtrichtung zur offenen Seite des Dichtringes liegt, das heißt, dass die offene Seite der Radial wellendichtung 11 zur Druckseite der Luftpassage gerichtet sein muss. Um eine sichere Abdichtung der beiden Luftpassagen 7 und 8 zueinander zu gewährleisten, müßte daher die Radialwellendichtung 11 zwischen den beiden Luftpassagen 7 und 8 aus zwei einzelnen spiegelsymmetrischen Radialwellendichtringen bestehen, die die jeweils offene Seite in Richtung der jeweiligen Luftpassage ausgerichtet haben. Wenn es im Rahmen der Funktion der Reifenfülleinrichtung sichergestellt ist, dass stets ein gleich gerichteter Druckgradient zwischen den Luftpassagen 7 und 8 vorherrscht, kann, so wie in Fig. 1 dargestellt, die Radialwellendichtung 11 auch nur einen Radialwellendichtring aufweisen, der seine offene Seite in Richtung des höheren Druckes ausgerichtet hat. In der in Fig. 1 dargestellten Weise müsste stets in der Luftpassage 8 ein höherer Druck vorherrschen als in der Luftpassage 7. Eine derartige Vereinfachung bringt neben Kostenvorteilen auch wesentliche Vorteile in der Bauraumgestaltung mit sich.It lies in the peculiarity of radial shaft seals, that the main sealing direction is to the open side of the sealing ring, that is, that the open side of the Radial shaft seal 11 must be directed to the pressure side of the air passage. In order to ensure a secure sealing of the two air passages 7 and 8 to each other, therefore, the radial shaft seal 11 between the two air passages 7 and 8 would consist of two individual mirror-symmetrical radial shaft seals, which have aligned the respective open side in the direction of the respective air passage. If it is ensured in the context of the function of the tire filling device that there is always an equal pressure gradient between the air passages 7 and 8, as shown in Fig. 1, the radial shaft seal 11 may also have only one radial shaft sealing ring, its open side in the direction has aligned the higher pressure. In the manner shown in Fig. 1 would always prevail in the air passage 8, a higher pressure than in the air passage 7. Such simplification brings not only cost advantages but also significant advantages in the space design with it.
Der innere Lagerteil ist in zumindest zwei Teile 1 und 2 geteilt, wobei in einer bevorzugten Ausführung, wie in Fig. 1 dargestellt, der Teil 1 als der innere Teil der Radnabe ausgebildet ist. Der Teil 1 muss nur im Bereich der Lagerlaufbahn und im Bereich der Dichtungslaufflächen entsprechend oberflächengehärtet sein. Der zweite Teil 2 des inneren Lagerteils ist in axialer Richtung auf dem ersten Teil 1 aufgesteckt und verschiebbar, sodass das Spiel des Lagers in bekannter Weise eingestellt und z.B. mittels einer hier nicht dargestellten Nutmutter fixiert werden kann.The inner bearing part is divided into at least two parts 1 and 2, wherein in a preferred embodiment, as shown in Fig. 1, the part 1 is formed as the inner part of the wheel hub. The part 1 must be surface hardened only in the area of the bearing raceway and in the area of the seal running surfaces. The second part 2 of the inner bearing part is plugged and slidable in the axial direction on the first part 1, so that the play of the bearing is set in a known manner and, for example can be fixed by means of a not shown here nut.
Die Schmierung der die beiden Luftpassagen 7 und 8 der Drehdurchführung trennenden Radialwellendichtung 11 erfolgt ähnlich wie in EP 1 141 595 beschrieben. Analog zur EP 1 141 595 ist im Teil 1 in axialer Richtung zumindest eine Querbohrung 15 vorgesehen; von dieser führt zumindest eine Radialbohrung 13 zu einem Hohlraum 20, der durch die dachförmige Ausführung der die beiden Luftpassagen 7 und 8 gegeneinander abdichtenden Radialwellendichtung 11 gebildet ist, und über den die Dichtungslauffläche der Radialwellendichtung 11 geschmiert werden kann.The lubrication of the two air passages 7 and 8 of the rotary feedthrough separating radial shaft seal 11 is similar to that described in EP 1 141 595. Analogously to EP 1 141 595, at least one transverse bore 15 is provided in part 1 in the axial direction; from this leads at least one radial bore 13 to a cavity 20 which is formed by the roof-shaped design of the two air passages 7 and 8 against each other sealing radial shaft seal 11, and over which the seal running surface of the radial shaft seal 11 can be lubricated.
In einer bevorzugten Ausführung sind auch die beiden axial äußeren Radialdichtungen 9 und 10 mit einem dachförmigen Ringspalt 21, 22 an der Dichtfläche ausgebildet, und werden analog der Radialwellendichtung 11 über Radialbohrungen 12 und 14 und der axialen Querbohrung 15 mit Schmiermittel versorgt. Damit sind sie unabhängig von der Schmiermittelversorgung der j Radlagerkugelkränze 3 und 4.In a preferred embodiment, the two axially outer radial seals 9 and 10 are formed with a roof-shaped annular gap 21, 22 on the sealing surface, and are analogous to the radial shaft seal 11 via Radial holes 12 and 14 and the axial transverse bore 15 supplied with lubricant. Thus they are independent of the lubricant supply of j wheel bearing ball races 3 and 4.
Um eine Montage der Dichtungen 9, 10 und 11 innerhalb der beiden Radlagerkugelkränze 3 und 4 zu ermöglichen, besteht die äußere Lagerschale aus zumindest zwei Teilen 5 und 6. In einer bevorzugten Ausführung trägt der eine Lagerschalenteil 6 die Dichtungen 9, 10 und 11 und ist gleichzeitig als äußerer Radnabenteil ausgeführt, um die Radlagerung mit möglichst wenigen einzelnen Bauteilen zu gestalten.In order to allow mounting of the seals 9, 10 and 11 within the two wheel bearing ball races 3 and 4, the outer bearing shell consists of at least two parts 5 and 6. In a preferred embodiment, the one bearing shell part 6 carries the seals 9, 10 and 11 and is at the same time designed as an outer wheel hub to make the wheel bearing with as few individual components.
Der Luftstrom erfolgt über die Bohrungen 16 und 17 im äußeren Nabenteil 6 durch die Luftpassagen 7, 8 und über Bohrungen 18 und 19 im inneren Nabenteil. Die Enden der Luftbohrungen 16, 17, 18, 19 können in weiterer Folge mit hier nicht näher dargestellten Anschlussstücken oder Dichtflächen versehen sein. The air flow takes place via the bores 16 and 17 in the outer hub part 6 through the air passages 7, 8 and via bores 18 and 19 in the inner hub part. The ends of the air bores 16, 17, 18, 19 can be provided in a further consequence with connecting pieces or sealing surfaces, not shown here.

Claims

Patentansprüche claims
1. Drehdurchführung innerhalb einer Radlagereinheit für eine Reifenfüll- oder Reifendruckregelanlage für Kraftfahrzeuge, bestehend aus einem inneren Lagerteil (1), einem äußeren Lagerteil (6), zwei Radlagerkugelkränzen (3, 4) und zwei Luftpassagen (7, 8), dadurch gekennzeichnet, dass der innere Lagerteil aus zumindest zwei Teilen (1, 2) besteht, und der äußere Lagerteil aus zumindest zwei Teilen (5, 6) besteht und zwischen den beiden Radlagerkugelkränzen (3, 4) zwei nach außen zu den Radlagerkugelkränzen (3, 4) und zueinander mittels Radialdichtungen (9, 10, 11) abgedichtete Luftpassagen (7, 8) bestehen.1. Rotary feedthrough within a wheel bearing unit for a Reifenfüll- or tire pressure control system for motor vehicles, consisting of an inner bearing part (1), an outer bearing part (6), two Radlagerkugelkränzen (3, 4) and two air passages (7, 8), characterized the inner bearing part consists of at least two parts (1, 2), and the outer bearing part consists of at least two parts (5, 6) and two outwardly between the two wheel bearing ball rings (3, 4) to the wheel bearing ball rings (3, 4) and air passages (7, 8) sealed to one another by means of radial seals (9, 10, 11).
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zur Dichtung zwischen den beiden Luftpassagen (7, 8) nur ein Radialwellendichtring (11) angeordnet ist.2. Device according to claim 1, characterized in that the seal between the two air passages (7, 8) only one radial shaft sealing ring (11) is arranged.
3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die offene Seite des Radialwellendichtringes (11) in Richtung der Luftpassage mit dem höheren Druck zeigt.3. Device according to claim 2, characterized in that the open side of the radial shaft sealing ring (11) points in the direction of the air passage with the higher pressure.
4. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Teil (1) des geteilten inneren Lagerteiles der Radnabeninnenteil ist.4. Device according to claim 1, characterized in that a part (1) of the divided inner bearing part of the hub inner part is.
5. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Teil (6) des geteilten äußeren Lagerteiles der Radnabenaußenteil ist. 5. Device according to claim 1, characterized in that a part (6) of the divided outer bearing part of the wheel hub outer part is.
PCT/AT2007/000129 2006-03-28 2007-03-16 Rotary leadthrough within a wheel bearing unit WO2007109818A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA518/2006 2006-03-28
AT0051806A AT502383B1 (en) 2006-03-28 2006-03-28 Rotary feed through device for use within wheel bearing unit of motor vehicle, has air passages sealed with respect to one another using radial seals that are arranged between wheel bearing ball races

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WO2007109818A1 true WO2007109818A1 (en) 2007-10-04

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Application Number Title Priority Date Filing Date
PCT/AT2007/000129 WO2007109818A1 (en) 2006-03-28 2007-03-16 Rotary leadthrough within a wheel bearing unit

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AT (1) AT502383B1 (en)
WO (1) WO2007109818A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354603A1 (en) * 2010-02-09 2011-08-10 Carl Freudenberg KG Seal between a fixed machine component and a second machine component rotating around it
CN113504053A (en) * 2021-06-17 2021-10-15 同济大学 Front axle assembly of automatic driving test target vehicle carrying platform

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2634782A (en) * 1950-10-30 1953-04-14 Bendix Westinghouse Automotive Tire inflation control system
US2768843A (en) * 1953-06-05 1956-10-30 Thew Shovel Co Multiple passage fluid coupling for power steering of cranes and the like
EP1141595B1 (en) * 1999-01-13 2003-11-05 Steyr-Daimler-Puch Spezialfahrzeug AG & Co. KG Device with components concentrically disposed and rotational in relation to each other and utilization of said device in tire inflating installation
WO2005078292A1 (en) * 2004-02-18 2005-08-25 Ntn Corporation Bearing device for wheel
DE102004021161A1 (en) * 2004-04-29 2005-11-24 Kessler & Co. Gmbh & Co. Kg System for passage of compressed air between the interior of a rotating vehicle tire and a nonrotating tire pressure control unit incorporates air channels and switchable sealing rings

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2634782A (en) * 1950-10-30 1953-04-14 Bendix Westinghouse Automotive Tire inflation control system
US2768843A (en) * 1953-06-05 1956-10-30 Thew Shovel Co Multiple passage fluid coupling for power steering of cranes and the like
EP1141595B1 (en) * 1999-01-13 2003-11-05 Steyr-Daimler-Puch Spezialfahrzeug AG & Co. KG Device with components concentrically disposed and rotational in relation to each other and utilization of said device in tire inflating installation
WO2005078292A1 (en) * 2004-02-18 2005-08-25 Ntn Corporation Bearing device for wheel
EP1717467A1 (en) * 2004-02-18 2006-11-02 Ntn Corporation Bearing device for wheel
DE102004021161A1 (en) * 2004-04-29 2005-11-24 Kessler & Co. Gmbh & Co. Kg System for passage of compressed air between the interior of a rotating vehicle tire and a nonrotating tire pressure control unit incorporates air channels and switchable sealing rings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2354603A1 (en) * 2010-02-09 2011-08-10 Carl Freudenberg KG Seal between a fixed machine component and a second machine component rotating around it
US20110193295A1 (en) * 2010-02-09 2011-08-11 Carl Freudenberg Kg Sealing arrangement between a stationary first machine part and a second machine part that rotates around the first machine part
US8672007B2 (en) 2010-02-09 2014-03-18 Carl Freudenberg Kg Sealing arrangement between a stationary first machine part and a second machine part that rotates around the first machine part
CN113504053A (en) * 2021-06-17 2021-10-15 同济大学 Front axle assembly of automatic driving test target vehicle carrying platform

Also Published As

Publication number Publication date
AT502383A4 (en) 2007-03-15
AT502383B1 (en) 2007-03-15

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