WO2009112243A2 - Wet multi-plate clutch - Google Patents

Wet multi-plate clutch Download PDF

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Publication number
WO2009112243A2
WO2009112243A2 PCT/EP2009/001726 EP2009001726W WO2009112243A2 WO 2009112243 A2 WO2009112243 A2 WO 2009112243A2 EP 2009001726 W EP2009001726 W EP 2009001726W WO 2009112243 A2 WO2009112243 A2 WO 2009112243A2
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WO
WIPO (PCT)
Prior art keywords
clutch
plate clutch
recesses
plates
teeth
Prior art date
Application number
PCT/EP2009/001726
Other languages
German (de)
French (fr)
Other versions
WO2009112243A3 (en
Inventor
Holger Grünleitner
Alexander Lerch
Michael Buck
Roberta Cavalcanti-Selbach
Original Assignee
Audi Ag
Volkswagen 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 Audi Ag, Volkswagen Ag filed Critical Audi Ag
Publication of WO2009112243A2 publication Critical patent/WO2009112243A2/en
Publication of WO2009112243A3 publication Critical patent/WO2009112243A3/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae
    • F16D13/68—Attachments of plates or lamellae to their supports
    • F16D13/683—Attachments of plates or lamellae to their supports for clutches with multiple lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/72—Features relating to cooling

Definitions

  • the invention relates to a wet-running multi-plate clutch, in particular for automatic transmissions in motor vehicles, according to the preamble of claim 1.
  • Such a multi-plate clutch describes, for example, WO 96/18051, in which elongated, circumferentially inclined recesses are provided within the annular, effective friction surfaces of the steel plates, which are intended to cause turbulence and associated detachment of the oil flow within the clutch plates.
  • the purpose of these recesses is to minimize the drag torque occurring at least temporarily due to the clutch cooling or the oil flow when the multi-plate clutch is disengaged and to reduce associated efficiency losses or malfunctions in the transmission control.
  • the object of the invention is to propose a multi-plate clutch of the generic type, which enables a further reduction of undesirable drag torques with undiminished high torque transmission with structurally low overhead.
  • the recesses are incorporated substantially radially outside the effective, annular friction surfaces of the steel disks in at least some of the teeth of the toothing. It was recognized that this effectively dissipates a flow congestion resulting from the design of the multi-plate clutch between the outer teeth of the steel disks and the corresponding clutch housing, and thus the undesirable drag torque when the multi-plate clutch is released can be significantly reduced.
  • the recesses do not reduce the effective friction surface, but such additional recesses are not necessarily excluded.
  • the recesses may be provided circumferentially in all teeth of the steel blades to ensure a particularly effective oil drain.
  • the recesses may be formed by holes, the diameter of which should correspond to provide effective flow cross sections at least one third of the tooth width of the teeth.
  • the recesses are made by open at the tooth tips notches in the teeth of the toothing. This allows taking into account the centrifugal oil flow in circumferential multi-plate clutch an effective deflection and dissipation of the cooling oil in the respective outflow openings of the clutch housing, as an added advantage also improved friction particles of the friction improved with the cooling oil and thus a trouble-free clutch function is ensured.
  • the notches can be adapted to existing flow conditions and depending on the oil-carrying grooves in the friction plates of Multi-disc clutch with semicircular groove base or with square groove base can be rectangular or square.
  • the notches can also be made V-shaped with radially outwardly widening flow cross-section.
  • the notches can be produced in a cost-effective manner in the stamping process, in particular in a single operation with the punching out of the entire steel plate.
  • Figure 1 shows the sketchy structure of a wet-running multi-plate clutch without surrounding clutch housing and inner hub, with alternately arranged steel plates and friction plates.
  • Figure 2 is a view of one of the steel plates of the multi-plate clutch, with radially outer teeth and executed as holes recesses in their teeth.
  • FIG. 3 shows an alternative embodiment of the steel lamella of FIG. 2, shown only partially, with semicircular notches arranged in the teeth;
  • FIG. 4 shows a further alternative embodiment of the steel plate according to FIG. 3 with quatradical notches; and Fig. 5 shows another, alternative embodiment of the steel blade of FIG. 3 with V-shaped notches in the teeth of the outer toothing.
  • FIG. 1 denoted by 10 is a multi-disc clutch, shown only in partial sketch, for automatic transmissions in motor vehicles which, unless described, is designed in a manner familiar to the person skilled in the art.
  • annular clutch disks are installed, which are formed alternately by friction disks 12 and steel disks 14 provided with friction bearings.
  • friction linings of the friction plates 12 radially aligned grooves are incorporated in a known manner.
  • the friction disks 12 have radially inner toothings 12a, via which the friction disks 12 are connected in the circumferential direction in a form-fitting manner with a shaft or hub (not shown) as a coupling input or output element.
  • the steel plates 14 have radially outer teeth 14 a, which produce a circumferentially positive connection with the coupling housing as the other Kupplungsausgangs- or input element.
  • the clutch plates 12, 14 can be pressed against each other via a non-illustrated hydrau- Tische actuator in the clutch housing with a force P for closing the multi-plate clutch 10.
  • the clutch plates 12, 14 are lifted apart from each other via a defined, low clearance.
  • the shaft or hub is provided via integrated channels with means for cooling oil supply, as indicated by the arrows 16.
  • the cooling oil flows radially outward with rotating multi-disc clutch 10 with centrifugal action and from there via return channels, not shown, in the clutch housing back into an oil sump.
  • the steel lamellae 14 are provided with recesses or openings, which are produced by bores 18 according to FIG.
  • the bores 18 lie substantially radially outside the annular friction surfaces 14b of the steel blades 14.
  • the friction surfaces 14b define their width as indicated by dashed lines between the tooth roots (according to FIG. 3 toothed base circle a) and the inner diameter d; the steel lamellae 14.
  • the diameters of the bores 18 correspond to approximately one third of the tooth width of the toothing 14a.
  • the said recesses in the steel lamellae 14 are formed by notches 20a to 20c which are open towards the tooth tips of the toothing. Their width is also about one third of the respective tooth width of the toothing 14a.
  • the notches 20a are as shown at least semicircular in the groove bottom, while according to FIG. 4, the notches 20b are designed with an angular groove bottom and in the clear cross-section approximately square. Finally, in FIG. 5, the notches 20c are embodied in a V-shape with a radially outwardly increasing throughflow cross section.
  • the configuration of the notches 20a to 20c depends, inter alia, on the required flow cross-sections and the design of the grooves in the friction linings of the friction discs 12 and, if necessary, can be determined empirically.
  • the notches 20a to 20c are also punched in a single operation with the production of steel plates 14 by punching.
  • the recesses or openings 18, 20 are incorporated continuously in each tooth of the toothing 14a.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The invention relates to a wet multi-plate clutch, in particular for automatic transmissions in motor vehicles, comprising annular clutch plates (12, 14) which are arranged in a clutch housing and are alternately subdivided into steel plates and friction disks (12). A radially external toothed section (14a) of the steel plates is positively connected to the clutch housing in the circumferential direction, while a radially internal toothed section of the friction disks (12) is positively connected to a shaft or hub. The friction disks have grooves which discharge oil radially outward, and the steel plates have recesses. In order to reduce a potential drag moment when the multi-plate clutch is disengaged, the recesses (18, 20a to 20c) are incorporated into at least some of the teeth of the toothed section (14a) in a substantially radial direction outside the effective, annular frictional surfaces (14b) of the steel plates (14).

Description

Beschreibung description
Nasslaufende LamellenkupplungWet running multi-disc clutch
Die Erfindung betrifft eine nasslaufende Lamellenkupplung, insbesondere für automatische Getriebe in Kraftfahrzeugen, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a wet-running multi-plate clutch, in particular for automatic transmissions in motor vehicles, according to the preamble of claim 1.
Eine derartige Lamellenkupplung beschreibt beispielsweise die WO 96/18051 , bei der innerhalb der ringförmigen, wirksamen Reibflächen der Stahllamellen langlochförmige, in Umfangsrichtung geneigte Ausnehmungen vorgesehen sind, die eine Turbulenz und damit verbunden ein Ablösen des Ölstromes innerhalb der Kupplungslamellen bewirken sollen. Zweck dieser Ausnehmungen ist es, das durch die Kupplungskühlung bzw. den Ölstrom zumindest zeitweilig auftretende Schleppmoment bei gelöster Lamellenkupplung zu minimieren und damit verbundene Wirkungsgradverluste oder Funktionsstörungen in der Getriebesteuerung abzubauen.Such a multi-plate clutch describes, for example, WO 96/18051, in which elongated, circumferentially inclined recesses are provided within the annular, effective friction surfaces of the steel plates, which are intended to cause turbulence and associated detachment of the oil flow within the clutch plates. The purpose of these recesses is to minimize the drag torque occurring at least temporarily due to the clutch cooling or the oil flow when the multi-plate clutch is disengaged and to reduce associated efficiency losses or malfunctions in the transmission control.
Aufgabe der Erfindung ist es, eine Lamellenkupplung der gattungsgemäßen Art vorzuschlagen, die mit baulich geringem Mehraufwand eine weitere Verminderung der unerwünschten Schleppmomente bei unvermindert hoher Momentenübertragung ermöglicht.The object of the invention is to propose a multi-plate clutch of the generic type, which enables a further reduction of undesirable drag torques with undiminished high torque transmission with structurally low overhead.
Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung beinhalten die Unteransprüche. Erfindungsgemäß wird vorgeschlagen, dass die Ausnehmungen im Wesentlichen radial außerhalb der wirksamen, ringförmigen Reibflächen der Stahllamellen in zumindest einige der Zähne der Verzahnung eingearbeitet sind. Es wurde erkannt, dass damit ein sich aufgrund der Konstruktion der Lamellen- kupplung zwischen der äußeren Verzahnung der Stahllamellen und dem korrespondierenden Kupplungsgehäuse ergebender Strömungsstau wirksam abgebaut wird und somit das unerwünschte Schleppmoment bei gelöster Lamellenkupplung deutlich verminderbar ist. Zudem wird ggf. der Vorteil erreicht, dass die Ausnehmungen nicht die wirksame Reibfläche vermindern, wobei aber solche zusätzlichen Ausnehmungen nicht zwingend ausgeschlossen sind.This object is achieved with the characterizing features of claim 1. Advantageous developments of the invention include the subclaims. According to the invention, it is proposed that the recesses are incorporated substantially radially outside the effective, annular friction surfaces of the steel disks in at least some of the teeth of the toothing. It was recognized that this effectively dissipates a flow congestion resulting from the design of the multi-plate clutch between the outer teeth of the steel disks and the corresponding clutch housing, and thus the undesirable drag torque when the multi-plate clutch is released can be significantly reduced. In addition, if necessary, the advantage is achieved that the recesses do not reduce the effective friction surface, but such additional recesses are not necessarily excluded.
In bevorzugter Weise können die Ausnehmungen umlaufend in allen Zähnen der Stahllamellen vorgesehen sein, um einen besonders wirksamen Ölabfluss sicherzustellen.Preferably, the recesses may be provided circumferentially in all teeth of the steel blades to ensure a particularly effective oil drain.
Die Ausnehmungen können durch Bohrungen gebildet sein, wobei deren Durchmesser zur Bereitstellung wirksamer Strömungsquerschnitte zumindest einem Drittel der Zahnbreite der Zähne entsprechen sollte.The recesses may be formed by holes, the diameter of which should correspond to provide effective flow cross sections at least one third of the tooth width of the teeth.
Besonders bevorzugt wird jedoch vorgeschlagen, dass die Ausnehmungen durch an den Zahnköpfen offene Ausklinkungen in den Zähnen der Verzahnung hergestellt sind. Dies ermöglicht unter Berücksichtigung des bei umlaufender Lamellenkupplung zentrifugalen Ölstromes eine wirkungsvolle Umlenkung und Ableitung des Kühlöles in die jeweiligen Abströmöffnungen des Kupplungsgehäuses, wobei als zusätzlicher Vorteil auch Abriebpartikel der Reibscheiben verbessert mit dem Kühlöl abführbar und somit eine störungsfreiere Kupplungsfunktion sichergestellt ist.Particularly preferred, however, it is proposed that the recesses are made by open at the tooth tips notches in the teeth of the toothing. This allows taking into account the centrifugal oil flow in circumferential multi-plate clutch an effective deflection and dissipation of the cooling oil in the respective outflow openings of the clutch housing, as an added advantage also improved friction particles of the friction improved with the cooling oil and thus a trouble-free clutch function is ensured.
Die Ausklinkungen können in Anpassung an vorliegende Strömungsver- hältnisse und abhängig von den ölführenden Nuten in den Reibscheiben der Lamellenkupplung mit halbkreisförmigem Nutgrund oder mit eckigem Nutgrund rechteckförmig oder quadratisch ausgeführt sein.The notches can be adapted to existing flow conditions and depending on the oil-carrying grooves in the friction plates of Multi-disc clutch with semicircular groove base or with square groove base can be rectangular or square.
In einer weiteren alternativen Ausgestaltung können die Ausklinkungen auch V-förmig mit sich radial nach außen erweiterndem Strömungsquerschnitt hergestellt sein.In a further alternative embodiment, the notches can also be made V-shaped with radially outwardly widening flow cross-section.
Schließlich können die Ausklinkungen in fertigungstechnisch kostengünstiger Weise im Stanzverfahren hergestellt sein, insbesondere in einem einzigen Arbeitsgang mit dem Herausstanzen der gesamten Stahllamelle.Finally, the notches can be produced in a cost-effective manner in the stamping process, in particular in a single operation with the punching out of the entire steel plate.
Mehrere Ausführungsbeispiele der Erfindung sind im Folgenden näher erläutert. Die schematische Zeichnung zeigt in:Several embodiments of the invention are explained in more detail below. The schematic drawing shows in:
Fig. 1 den skizzenhaften Aufbau einer nasslaufenden Lamellenkupplung ohne umgebendes Kupplungsgehäuse und innerer Nabe, mit alternierend angeordneten Stahllamellen und Reibscheiben;Figure 1 shows the sketchy structure of a wet-running multi-plate clutch without surrounding clutch housing and inner hub, with alternately arranged steel plates and friction plates.
Fig. 2 eine Ansicht einer der Stahllamellen der Lamellenkupplung, mit radial äußerer Verzahnung und mit als Bohrungen ausgeführten Ausnehmungen in deren Zähnen;Figure 2 is a view of one of the steel plates of the multi-plate clutch, with radially outer teeth and executed as holes recesses in their teeth.
Fig. 3 eine alternative Ausgestaltung der nur teilweise dargestellten Stahllamelle nach Fig. 2, mit in den Zähnen angeordneten, halbkreis- förmigen Ausklinkungen;3 shows an alternative embodiment of the steel lamella of FIG. 2, shown only partially, with semicircular notches arranged in the teeth;
Fig. 4 eine weitere, alternative Ausgestaltung der Stahllamelle nach Fig. 3 mit quatradischen Ausklinkungen; und Fig. 5 eine weitere, alternative Ausgestaltung der Stahllamelle nach Fig. 3 mit V-förmigen Ausklinkungen in den Zähnen der äußeren Verzahnung.4 shows a further alternative embodiment of the steel plate according to FIG. 3 with quatradical notches; and Fig. 5 shows another, alternative embodiment of the steel blade of FIG. 3 with V-shaped notches in the teeth of the outer toothing.
In der Fig. 1 ist mit 10 eine nur teilweise skizzenhaft dargestellte Lamellen- kupplung für automatische Getriebe in Kraftfahrzeugen bezeichnet, die soweit nicht beschrieben in, dem Fachmann geläufiger Bauweise ausgeführt ist.In FIG. 1, denoted by 10 is a multi-disc clutch, shown only in partial sketch, for automatic transmissions in motor vehicles which, unless described, is designed in a manner familiar to the person skilled in the art.
Dabei sind in einem nicht dargestellten, trommeiförmigen Kupplungsgehäuse ringförmige Kupplungslamellen eingebaut, die alternierend durch mit Reibbe- lägen versehene Reibscheiben 12 und Stahllamellen 14 gebildet sind. In den Reibbelägen der Reibscheiben 12 sind in bekannter Weise radial ausgerichtete Nuten eingearbeitet.In this case, in a drum-shaped clutch housing (not shown), annular clutch disks are installed, which are formed alternately by friction disks 12 and steel disks 14 provided with friction bearings. In the friction linings of the friction plates 12 radially aligned grooves are incorporated in a known manner.
Die Reibscheiben 12 weisen radial innere Verzahnungen 12a auf, über die die Reibscheiben 12 in Umfangsrichtung formschlüssig mit einer Welle oder Nabe (nicht dargestellt) als Kupplungseingangs- oder -ausgangselement verbunden sind.The friction disks 12 have radially inner toothings 12a, via which the friction disks 12 are connected in the circumferential direction in a form-fitting manner with a shaft or hub (not shown) as a coupling input or output element.
Ferner weisen die Stahllamellen 14 radial äußere Verzahnungen 14a auf, die eine in Umfangsrichtung formschlüssige Verbindung mit dem Kupplungsgehäuse als dem anderen Kupplungsausgangs- oder -eingangselement herstellen.Furthermore, the steel plates 14 have radially outer teeth 14 a, which produce a circumferentially positive connection with the coupling housing as the other Kupplungsausgangs- or input element.
Die Kupplungslamellen 12, 14 können über eine nicht dargestellte, hydrau- Tische Betätigungseinrichtung in dem Kupplungsgehäuse mit einer Kraft P zum Schließen der Lamellenkupplung 10 aneinandergepresst werden. Im offenen, gelösten Zustand sind die Kupplungslamellen 12, 14 über ein definiertes, geringes Lüftspiel voneinander abgehoben. Des Weiteren ist die Welle oder Nabe über integrierte Kanäle mit Einrichtungen zur Kühlöl-Zuführung versehen, wie dies mit den Pfeilen 16 angedeutet ist. Das Kühlöl strömt dabei bei drehender Lamellenkupplung 10 mit Zentrifugalwirkung radial nach außen und von dort über nicht dargestellte Rückführ- kanäle im Kupplungsgehäuse wieder zurück in einen Ölsumpf.The clutch plates 12, 14 can be pressed against each other via a non-illustrated hydrau- Tische actuator in the clutch housing with a force P for closing the multi-plate clutch 10. In the open, released state, the clutch plates 12, 14 are lifted apart from each other via a defined, low clearance. Furthermore, the shaft or hub is provided via integrated channels with means for cooling oil supply, as indicated by the arrows 16. The cooling oil flows radially outward with rotating multi-disc clutch 10 with centrifugal action and from there via return channels, not shown, in the clutch housing back into an oil sump.
Um dabei einen Ölstau im Bereich der radial äußeren Verzahnung der Stahllamellen 14 und dem mit einer entsprechenden Innenverzahnung versehenen Kupplungsgehäuse zu vermeiden, sind die Stahllamellen 14 mit Ausneh- mungen oder Durchbrüchen versehen, die gemäß Fig. 2 durch Bohrungen 18 hergestellt sind.In order to avoid an accumulation of oil in the region of the radially outer toothing of the steel lamellae 14 and the coupling housing provided with a corresponding internal toothing, the steel lamellae 14 are provided with recesses or openings, which are produced by bores 18 according to FIG.
Die Bohrungen 18 liegen dabei im Wesentlichen radial außerhalb der ringförmigen Reibflächen 14b der Stahllamellen 14. Die Reibflächen 14b definieren sich in ihrer Breite wie mit gestrichelten Linien angedeutet zwischen den Zahnfüßen (gemäß Fig. 3 Verzahnungsgrundkreis a) und dem Innendurchmesser d; der Stahllamellen 14.The bores 18 lie substantially radially outside the annular friction surfaces 14b of the steel blades 14. The friction surfaces 14b define their width as indicated by dashed lines between the tooth roots (according to FIG. 3 toothed base circle a) and the inner diameter d; the steel lamellae 14.
Die Durchmesser der Bohrungen 18 entsprechen etwa einem Drittel der Zahn- breite der Verzahnung 14a.The diameters of the bores 18 correspond to approximately one third of the tooth width of the toothing 14a.
Gemäß den Fig. 3 bis 5 sind die besagten Ausnehmungen in den Stahllamellen 14 durch zu den Zahnköpfen der Verzahnung offene Ausklinkungen 20a bis 20c gebildet. Deren Breite beträgt ebenfalls ca. ein Drittel der jeweiligen Zahn-breite der Verzahnung 14a.According to FIGS. 3 to 5, the said recesses in the steel lamellae 14 are formed by notches 20a to 20c which are open towards the tooth tips of the toothing. Their width is also about one third of the respective tooth width of the toothing 14a.
In der Fig. 3 sind die Ausklinkungen 20a wie ersichtlich zumindest in deren Nutgrund halbkreisförmig ausgeführt, während gemäß Fig. 4 die Ausklinkungen 20b mit eckigem Nutgrund und im lichten Querschnitt etwa quadratisch gestaltet sind. In der Fig. 5 schließlich sind die Ausklinkungen 20c V-förmig mit radial nach außen zunehmendem Durchströmquerschnitt ausgeführt. Die Konfiguration der Ausklinkungen 20a bis 20c richtet sich u.a. nach den erforderlichen Durchströmquerschnitten und der Gestaltung der Nuten in den Reibbelägen der Reibscheiben 12 und ist ggf. empirisch zu ermitteln.In Fig. 3, the notches 20a are as shown at least semicircular in the groove bottom, while according to FIG. 4, the notches 20b are designed with an angular groove bottom and in the clear cross-section approximately square. Finally, in FIG. 5, the notches 20c are embodied in a V-shape with a radially outwardly increasing throughflow cross section. The configuration of the notches 20a to 20c depends, inter alia, on the required flow cross-sections and the design of the grooves in the friction linings of the friction discs 12 and, if necessary, can be determined empirically.
Die Ausklinkungen 20a bis 20c sind ferner in einem Arbeitsgang mit der Herstellung der Stahllamellen 14 im Stanzverfahren eingestanzt.The notches 20a to 20c are also punched in a single operation with the production of steel plates 14 by punching.
In den dargestellten Ausführungsbeispielen sind die Ausnehmungen bzw. Durchbrüche 18, 20 durchgehend in einem jeden Zahn der Verzahnung 14a eingearbeitet. Es kann aber auch angezeigt sein, nur bestimmte Verzahnungs- Umfangsbereiche oder ein definiertes Abstandsmuster an Zähnen mit Ausnehmungen und Zähnen ohne Ausnehmungen zu verwenden. In the illustrated embodiments, the recesses or openings 18, 20 are incorporated continuously in each tooth of the toothing 14a. However, it may also be appropriate to use only certain gearing peripheral areas or a defined spacing pattern of teeth with recesses and teeth without recesses.

Claims

Patentansprüche claims
1. Nasslaufende Lamellenkupplung, insbesondere für automatische Getriebe in Kraftfahrzeugen, mit in einem Kupplungsgehäuse angeord- neten, ringförmigen Kupplungslamellen (12, 14), von denen alternierend erste Kupplungslamellen, etwa Reibscheiben (12), mit einem Innen- lamellenträger formschlüssig verbunden sind, und zweite Kupplungslamellen, etwa Stahllamellen (14), mit einer radial äußeren Verzahnung (14a) in Umfangsrichtung formschlüssig mit einem Außenlamellenträger des Kupplungsgehäuses verbunden sind, wobei in den zweiten Kupplungslamellen (14) Ausnehmungen (18, 20a bis 20c) vorgesehen sind, dadurch gekennzeichnet, dass die Ausnehmungen (18, 20a bis 20c) im Wesentlichen radial außerhalb der wirksamen, ringförmigen Reibflächen (14b) der zweiten Kupplungslamellen (14) in zumindest einige der Zähne der Verzahnung (14a) eingearbeitet sind.1. Wet-running multi-plate clutch, in particular for automatic transmissions in motor vehicles, with arranged in a clutch housing, annular clutch plates (12, 14), of which alternately first clutch plates, such as friction plates (12) are positively connected to an inner disc carrier, and second clutch plates, such as steel plates (14), with a radially outer toothing (14a) in the circumferential direction are positively connected to an outer disc carrier of the clutch housing, wherein in the second clutch plates (14) recesses (18, 20a to 20c) are provided, characterized in that the recesses (18, 20a to 20c) are incorporated into at least some of the teeth of the toothing (14a) substantially radially outside the effective annular friction surfaces (14b) of the second clutch plates (14).
2. Lamellenkupplung nach Anspruch 1 , dadurch gekennzeichnet, dass die Ausnehmungen (18, 20a bis 20c) umlaufend in allen Zähnen der Verzahnung (14a) der zweiten Kupplungslamellen (14) vorgesehen sind.2. multi-plate clutch according to claim 1, characterized in that the recesses (18, 20a to 20c) circumferentially in all teeth of the toothing (14a) of the second clutch plates (14) are provided.
3. Lamellenkupplung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Ausnehmungen durch Bohrungen (18) gebildet sind. 3. multi-plate clutch according to claim 1 or 2, characterized in that the recesses are formed by bores (18).
4. Lamellenkupplung nach Anspruch 3, dadurch gekennzeichnet, dass der Durchmesser der Bohrungen zumindest einem Drittel der Zahnbreite der Zähne der Verzahnung (14a) entspricht.4. multi-plate clutch according to claim 3, characterized in that the diameter of the bores corresponds to at least one third of the tooth width of the teeth of the toothing (14 a).
5. Lamellenkupplung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Ausnehmungen durch an den Zahnköpfen offene Ausklein- kungen (20a, 20b, 20c) in den Zähnen der Verzahnung (14a) hergestellt sind.5. Multi-plate clutch according to claim 1 or 2, characterized in that the recesses are made by open at the tooth tips Ausklein- (20a, 20b, 20c) in the teeth of the toothing (14a).
6. Lamellenkupplung nach Anspruch 5, dadurch gekennzeichnet, dass die Ausklinkungen (20a) mit halbkreisförmigem Nutgrund ausgeführt sind.6. multi-plate clutch according to claim 5, characterized in that the notches (20 a) are executed with semicircular groove bottom.
7. Lamellenkupplung nach Anspruch 5, dadurch gekennzeichnet, dass die Ausklinkungen (20b) mit eckigem Nutgrund rechteckförmig oder quadratisch ausgeführt sind.7. multi-plate clutch according to claim 5, characterized in that the notches (20 b) are executed with square groove bottom rectangular or square.
8. Lamellenkupplung nach Anspruch 5, dadurch gekennzeichnet, dass die Ausklinkungen (20c) V-förmig mit sich radial nach außen erweitern- dem Strömungsquerschnitt hergestellt sind.8. multi-plate clutch according to claim 5, characterized in that the notches (20c) are made V-shaped with radially outwardly widening the flow cross-section.
9. Lamellenkupplung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausklinkungen (20a, 20b, 20c) im Stanzverfahren hergestellt sind. 9. multi-plate clutch according to one or more of the preceding claims, characterized in that the notches (20a, 20b, 20c) are produced by stamping.
PCT/EP2009/001726 2008-03-12 2009-03-11 Wet multi-plate clutch WO2009112243A2 (en)

Applications Claiming Priority (2)

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DE102008013910A DE102008013910A1 (en) 2008-03-12 2008-03-12 Wet running multi-disc clutch
DE102008013910.6 2008-03-12

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WO2009112243A2 true WO2009112243A2 (en) 2009-09-17
WO2009112243A3 WO2009112243A3 (en) 2009-11-05

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CN108223605A (en) * 2016-12-15 2018-06-29 舍弗勒技术股份两合公司 Inner plate carrier, corresponding production method and clutch device
WO2021032547A1 (en) * 2019-08-21 2021-02-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clutch disc or friction disc and system composed of clutch disc or friction disc and clutch case for effecting a reduced drag resistance

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DE102017203637A1 (en) 2017-03-07 2018-09-13 Zf Friedrichshafen Ag Slats switching element
DE102019122482A1 (en) * 2019-08-21 2021-02-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clutch disc or friction disc, clutch bell and a system consisting of clutch disc or friction disc and clutch bell to effect noise optimization
DE102021102293B4 (en) 2021-02-02 2022-09-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Disc carrier of a wet clutch

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CN108223605A (en) * 2016-12-15 2018-06-29 舍弗勒技术股份两合公司 Inner plate carrier, corresponding production method and clutch device
WO2021032547A1 (en) * 2019-08-21 2021-02-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clutch disc or friction disc and system composed of clutch disc or friction disc and clutch case for effecting a reduced drag resistance
CN114270063A (en) * 2019-08-21 2022-04-01 克诺尔商用车制动系统有限公司 Clutch disk or friction disk for generating reduced drag power and system comprising a clutch disk or friction disk and a clutch cover
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DE102008013910A1 (en) 2009-09-17

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