WO2001063148A1 - Transmission unit - Google Patents

Transmission unit Download PDF

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Publication number
WO2001063148A1
WO2001063148A1 PCT/EP2001/001881 EP0101881W WO0163148A1 WO 2001063148 A1 WO2001063148 A1 WO 2001063148A1 EP 0101881 W EP0101881 W EP 0101881W WO 0163148 A1 WO0163148 A1 WO 0163148A1
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WO
WIPO (PCT)
Prior art keywords
coating
variator
carrier
shaft
input
Prior art date
Application number
PCT/EP2001/001881
Other languages
German (de)
French (fr)
Inventor
Jürgen WAFZIG
Original Assignee
Zf Friedrichshafen 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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2001063148A1 publication Critical patent/WO2001063148A1/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
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces

Definitions

  • the present invention relates to a drive unit, in particular for motor vehicles, with a housing, with an input shaft, with an output shaft, with an arrangement for changing the transmission ratio between the input shaft and the output shaft in the form of a continuously variable friction gear transmission and a starting element ,
  • Infinitely variable transmissions are widely known in the form of wrapping gear or in the form of friction wheel transmissions.
  • CVT Infinitely variable transmissions
  • DE 198 44 374.9 of the applicant describes a belt which has a first pair of conical disks on an input shaft and a second pair of conical disks on an output shaft, each pair of conical disks consisting of a first disc which is fixed in the axial direction and a second which is displaceable in the axial direction Cone pulley (primary pulleys or secondary pulleys).
  • a looping element runs between the conical disk pairs, e.g. a push link belt.
  • the primary or secondary disc is adjusted by means of a pressure medium with the help of an electronic control unit, which controls the pressure level of the primary and secondary disc space via electromagnetic actuators and hydraulic valves.
  • a friction wheel transmission is described, for example, in WO 99/05433 by the applicant. It has input and output disks which are arranged coaxially to a common shaft, which are arranged in pairs to one another and whose inner surfaces are toroidal in shape, and friction wheels arranged between the pairs of input and output disks. These friction wheels are in frictional contact both with the input disks and with the output disks and transmit the torque transmitted to them from the input disk to the output disk by frictional contact, the rotational speed of the friction wheels being the greater the greater the distance between their is with the input disc and the axis of rotation. The speed of the output disk, however, is the greater the closer the point of contact between the friction wheel and the output disk is to the axis of rotation.
  • the speed of the output disc can therefore be adjusted continuously and arbitrarily.
  • the axes of rotation of the friction wheels are mounted on a carrier which can be controlled via a pivoting device.
  • the two input disks of the two gear units are rotatably connected to a torque shaft, while the two output disks of the two gear units, which are arranged mirror-symmetrically to one another and next to one another in the gear, are arranged on a common bush which is rotatably mounted on the torque shaft.
  • the torque shaft is penetrated by an input shaft which is connected to a starting element of a motor vehicle, for example a torque converter or a wet-running starting clutch of the engine of the vehicle.
  • the input and output disks described therein, which together form a variator, are designed as half-toroidal disks, so that the variator is also referred to overall as a half-toroidal variator.
  • the friction wheels between the facing semi-toroidal surfaces between each pair of input disc and output The disc is in frictional contact with it, with all the discs being mounted on a torque shaft, which is slightly displaceable in the axial direction relative to the housing, and with an input disc of the one drive unit being attached to the torque shaft in a rotationally fixed manner, but being axially slidably mounted on it.
  • the input disk of the other gear unit is also non-rotatably connected to the torque shaft by driving teeth
  • the two output disks of the two transmission units which are mirror-symmetrically arranged to one another and next to one another in the gearbox, are fastened on a common bushing, so that a torque which is an input disk of the associated output disk and a torque, which is transmitted from the other input disk of the associated output disk, are transmitted from the two output disks, which are non-rotatably connected to the bushing, to a toothed wheel which supplies this torque to an output shaft.
  • a roller-shaped pressing device is used to apply the force, which is provided between one of the input disks, which is provided with a cam track and a further disk with a corresponding cam track, and which is mounted on the input shaft so as to be displaceable in the axial direction, and is non-rotatably connected to it, so that the pressing device corresponding input disc in the axial direction to the other input disc hm.
  • Such a gear unit is usually provided with a starting element, which is connected upstream of the variator at the motor-side end of the gear unit.
  • This starting element is, in particular, a multi-plate clutch, which consists of an inner plate carrier with a radial extension outwards extending slats and an outer disk carrier with radially inwardly extending slats, the lamellae of the inner disk carrier and the outer disk carrier forming a lamella toothing.
  • the object of the present invention is to design a gear unit in such a way that these deformations occurring in the gear itself are compensated for.
  • the outer disk carrier is attached directly to the main variator.
  • the axial compensation of the elastic deformations caused by the contact pressure takes place via the lamellar toothing of the lamellar supports;
  • the slats ⁇ er Horn with a reinforcing coating for example a Nitrocarbu- or a chromium layer are provided, whereby the abovementioned friction forces are minimized and one rigid combination of disc carrier and variator main shaft is made possible.
  • stiffening coatings lead to low coefficients of friction and thus to very low axial ones
  • such a coating has the advantage of high resistance, so that even high loads in the lamellar toothing can be endured without problems over a long period of time.
  • the gear unit consists of a housing, an oil supply with oil pump arranged on the engine side, and a starting element 2 in the form of a multi-plate clutch which has an outer plate carrier 4, which is provided with plates arranged parallel to one another and extend inwards in the radial direction, and an inner plate carrier, which is provided with a number of lamellae extending parallel to one another and extending in the radial direction, these lamellae forming a lamella toothing.
  • 6 and 7 designate two semi-toroidal disks facing each other, which are part of the variator of the friction gear, which is arranged after the starting element 2.
  • the outer disk carrier 4 is now directly connected to the variator main unit 5, so that the deformations caused by the contact forces are considerably reduced.
  • the lamellar toothing of the outer lamellar carrier is provided with a stiffening and at the same time reducing the coefficient of friction, for example a nitrocarbuner coating or a chrome coating, which contribute significantly to a rigid combination of the components comprising the lamellar carrier and the variator ,

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

The invention relates to a transmission unit, especially for motor vehicles, provided with a housing, an input shaft, an output shaft, and with a friction gear which has a variator. The transmission element comprises, as a starting element, a multi-plate clutch which has an inner plate support and an outer plate support. The outer plate support (4) is directly fastened to the variator main shaft (5), whereas the plate teeth of the plate support (4) are provided with a reinforcing coating.

Description

Getriebeeinheit gear unit
Die vorliegende Erfindung betrifft eine Getπebeein- heit insbesondere für Kraftfahrzeuge, mit einem Gehäuse, mit einer Antriebswelle, mit einer Abtriebswelle, mit einer Anordnung zur Veränderung des Übersetzungsverhältnisses zwischen der Antriebswelle und der Abtriebswelle in Form eines stufenlosen einen Variator aufweisenden Reibradge- triebes und einem Anfahrelement.The present invention relates to a drive unit, in particular for motor vehicles, with a housing, with an input shaft, with an output shaft, with an arrangement for changing the transmission ratio between the input shaft and the output shaft in the form of a continuously variable friction gear transmission and a starting element ,
Stufenlos verstellbare Getriebe (CVT) sind in Form von Umschlingungsgetπeben oder in Form von Reibradgetrieben vielfaltig bekannt. So beschreibt die DE 198 44 374.9 der Anmelderin ein Umschlingungsgetnebe, das ein erstes Kegelscheibenpaar auf einer Antriebswelle aufweist und ein zweites Kegelscheibenpaar auf einer Abtriebswelle aufweist, wobei jedes Kegelscheibenpaar aus einer in axialer Richtung feststehenden ersten Scheibe und aus einer in axialer Rich- tung verschiebbaren zweiten Kegelscheibe (Primarscheiben bzw. Sekundarscheiben) besteht. Zwischen den Kegelscheiben- paaren lauft ein Umschlingungsorgan, z.B. ein Schubglieder- band. Die Verstellung der Primarscheibe bzw. Sekundarschei- be erfolgt durch ein Druckmedium mit Hilfe eines elektroni- sehen Steuergerätes, welches über elektromagnetische Stellglieder und hydraulische Ventile das Druckniveau der Stell- raume von Primarscheibe und Sekundarscheibe ansteuert.Infinitely variable transmissions (CVT) are widely known in the form of wrapping gear or in the form of friction wheel transmissions. For example, DE 198 44 374.9 of the applicant describes a belt which has a first pair of conical disks on an input shaft and a second pair of conical disks on an output shaft, each pair of conical disks consisting of a first disc which is fixed in the axial direction and a second which is displaceable in the axial direction Cone pulley (primary pulleys or secondary pulleys). A looping element runs between the conical disk pairs, e.g. a push link belt. The primary or secondary disc is adjusted by means of a pressure medium with the help of an electronic control unit, which controls the pressure level of the primary and secondary disc space via electromagnetic actuators and hydraulic valves.
Ein Reibradgetriebe ist beispielsweise in der WO 99/05433 der Anmelderm beschrieben. Es weist koaxial zu einer gemeinsamen Welle angeordnete Eingangs- und Ausgangsscheiben auf, die paarweise zueinander angeordnet sind und deren Innenflachen toroidformig ausgestaltet sind, sowie zwischen den Paaren von Eingangs- und Ausgangsscheiben angeordnete Reibrader. Diese Reibrader stehen sowohl mit den Eingangsscheiben als auch mit den Ausgangsscheiben in Reibkontakt und übertragen das ihnen von der Eingangsscheibe übertragene Drehmoment auf die Ausgangsscheibe durch reib- schlussigen Kontakt, wobei die Drehzahl der Reibrader um so hoher liegt, e großer der Abstand zwischen ihrer Beruh- rungsstelle mit der Eingangsscheibe und der Drehachse ist. Die Drehzahl der Ausgangsscheibe hingegen ist um so großer, e naher die Beruhrungsstelle zwischen Reibrad und Aus- gangsscheibe an der Drehachse liegt. Durch Verschwenkung der Reibrader kann demzufolge die Drehzahl der Ausgangsscheibe stufenlos und beliebig eingestellt werden. Zu diesem Zweck sind die Drehachsen der Reibrader an einem Trager gelagert, der über eine Verschwenkemπchtung ansteuerbar ist. Die beiden Eingangsscheiben der beiden Getriebeeinheiten sind hierbei drehtest mit einer Drehmomentwelle verbunden, wahrend die beiden Ausgangsscheiben der beiden Getriebeeinheiten, die spiegelsymmetrisch zueinander und neben- einander im Getriebe angeordnet sind, auf einer gemeinsamen Buchse angeordnet sind, welche drehbar auf der Drehmomentwelle gelagert ist. Die Drehmomentwelle wird von einer Eingangswelle durchsetzt, die mit einem Anfahrelement eines Kraftfahrzeuges, beispielsweise einem Drehmomentwandler oder einer naßlaufenden Anfahrkupplung der Antriebsmaschine des Fahrzeugs verbunden ist.A friction wheel transmission is described, for example, in WO 99/05433 by the applicant. It has input and output disks which are arranged coaxially to a common shaft, which are arranged in pairs to one another and whose inner surfaces are toroidal in shape, and friction wheels arranged between the pairs of input and output disks. These friction wheels are in frictional contact both with the input disks and with the output disks and transmit the torque transmitted to them from the input disk to the output disk by frictional contact, the rotational speed of the friction wheels being the greater the greater the distance between their is with the input disc and the axis of rotation. The speed of the output disk, however, is the greater the closer the point of contact between the friction wheel and the output disk is to the axis of rotation. By swiveling the friction wheel, the speed of the output disc can therefore be adjusted continuously and arbitrarily. For this purpose, the axes of rotation of the friction wheels are mounted on a carrier which can be controlled via a pivoting device. The two input disks of the two gear units are rotatably connected to a torque shaft, while the two output disks of the two gear units, which are arranged mirror-symmetrically to one another and next to one another in the gear, are arranged on a common bush which is rotatably mounted on the torque shaft. The torque shaft is penetrated by an input shaft which is connected to a starting element of a motor vehicle, for example a torque converter or a wet-running starting clutch of the engine of the vehicle.
Die darin beschriebenen Eingangs- und Ausgangsschei- ben, die zusammen einen Variator bilden, sind als Halbtoro- ld-Scheiben ausgebildet, sodass der Variator auch insgesamt als Halbtoroid-Variator bezeichnet wird. Die Reibrader zwischen den einander zugewandten halbtoroid-formigen Flachen zwischen einem jedem Paar aus Eingangsscheibe und Ausgangs- Scheibe stehen mit diesen in reibschlussigem Kontakt, wobei alle Scheiben auf einer Drehmomentwelle gelagert sind, die geringfügig in Axialrichtung relativ zum Gehäuse verschiebbar ist und wobei eine Eingangsscheibe der einen Getπebe- einheit drehfest mit der Drehmomentwelle befestigt ist, jedoch axial gleitend auf ihr gelagert ist. Auch die Eingangsscheibe der anderen Getriebeeinheit ist drehfest durch eine Mitnahmeverzahnung mit der Drehmomentwelle verbunden, wohingegen die beiden Ausgangsscheiben der beiden Getnebe- einheiten, die spiegelsymmetnsch zueinander und nebeneinander im Getriebe angeordnet sind, auf einer gemeinsamen Buchse befestigt sind, sodass ein Drehmoment, das von der einen Eingangsscheibe der zugehörigen Ausgangsscheibe und ein Drehmoment, das von der anderen Eingangsscheibe der zugehörigen Ausgangsscheibe übertragen wird, von den beiden drehfest mit der Buchse verbundenen Ausgangsscheiben einem Zahnrad übertragen werden, welches dieses Drehmoment einer Ausgangswelle zufuhrt.The input and output disks described therein, which together form a variator, are designed as half-toroidal disks, so that the variator is also referred to overall as a half-toroidal variator. The friction wheels between the facing semi-toroidal surfaces between each pair of input disc and output The disc is in frictional contact with it, with all the discs being mounted on a torque shaft, which is slightly displaceable in the axial direction relative to the housing, and with an input disc of the one drive unit being attached to the torque shaft in a rotationally fixed manner, but being axially slidably mounted on it. The input disk of the other gear unit is also non-rotatably connected to the torque shaft by driving teeth, whereas the two output disks of the two transmission units, which are mirror-symmetrically arranged to one another and next to one another in the gearbox, are fastened on a common bushing, so that a torque which is an input disk of the associated output disk and a torque, which is transmitted from the other input disk of the associated output disk, are transmitted from the two output disks, which are non-rotatably connected to the bushing, to a toothed wheel which supplies this torque to an output shaft.
Zur Krafteinleitung dient eine rollenformige Anpresseinrichtung, die zwischen einer der Eingangsscheiben, die mit einer Kurvenbahn versehen ist und einer weiteren Scheibe mit einer entsprechenden Kurvenbahn vorgesehen ist und die in Axialrichtung verschiebbar auf der Eingangswelle gelagert ist sowie drehfest mit ihr verbunden ist, sodass die Anpreßeinrichtung die entsprechende Eingangsscheibe in Axialrichtung zur anderen Eingangsscheibe hm beaufschlagt.A roller-shaped pressing device is used to apply the force, which is provided between one of the input disks, which is provided with a cam track and a further disk with a corresponding cam track, and which is mounted on the input shaft so as to be displaceable in the axial direction, and is non-rotatably connected to it, so that the pressing device corresponding input disc in the axial direction to the other input disc hm.
üblicherweise ist eine derartige Getriebeeinheit mit einem Anfahrelement versehen, das an dem motorseitigen Ende der Getriebeeinheit dem Variator vorgeschaltet ist. Dieses Anfahrelement ist insbesondere eine Lamellenkupplung, die aus einem Innenlamellentrager mit radial sich nach außen erstreckenden Lamellen und einem Außenlamellentrager mit radial sich nach innen erstreckenden Lamellen besteht, wobei die Lamellen des Innenlamellentragers und des Außenla- mellentragers eine Lamellenverzahnung bilden.Such a gear unit is usually provided with a starting element, which is connected upstream of the variator at the motor-side end of the gear unit. This starting element is, in particular, a multi-plate clutch, which consists of an inner plate carrier with a radial extension outwards extending slats and an outer disk carrier with radially inwardly extending slats, the lamellae of the inner disk carrier and the outer disk carrier forming a lamella toothing.
Die halbtoroid-formigen Variatoren derartiger Reibradgetriebe unterliegen nun aufgrund der hohen auf das Getriebe einwirkenden Anpresskrafte erheblichen elatischen Deformationen, die beispielsweise im Bereich von 4 bis 8 mm lie- gen.The semi-toroidal variators of such friction wheel transmissions are now subject to considerable elastic deformations, for example in the range of 4 to 8 mm, due to the high contact forces acting on the transmission.
Aufgabe der vorliegenden Erfindung ist es, eine Getriebeeinheit dahingehend auszugestalten, dass diese auftretenden Deformationen im Getriebe selbst ausgeglichen werden.The object of the present invention is to design a gear unit in such a way that these deformations occurring in the gear itself are compensated for.
Ausgehend von einer Getriebeeinheit der eingangs naher genannten Art erfolgt die Losung dieser Aufgabe mit den im Anspruch 1 angegebenen Merkmalen; vorteilhafte Ausgestal- tungen sind in den Unteranspruchen beschrieben.Starting from a gear unit of the type mentioned at the outset, this object is achieved with the features specified in claim 1; advantageous refinements are described in the subclaims.
Erfmdungsgemaß ist also zum einen vorgesehen, dass der Außenlamellentrager direkt an der VariatorhauptweUe befestigt ist. Der axiale Ausgleich der durch die Anpress- krafte bedingten elastischen Deformationen erfolgt dabei über die Lamellenverzahnung der Lamellentrager; da die Axialbewegung der Lamellen jedoch Reibkrafte verursacht, die die Lastverteilung und somit die Stabilität des Varia¬ tors beeinträchtigen, wird gemäß einem weiteren Merkmal der Erfindung vorgeschlagen, dass die Lamellen mit einer versteifenden Beschichtung, beispielsweise einer Nitrocarbu- πerschicht oder einer Chromschicht versehen sind, wodurch die oben genannten Reibkrafte minimiert werden und eine starre Kombination aus Lamellentrager und Variatorhauptwel- le ermöglicht wird.According to the invention, it is provided on the one hand that the outer disk carrier is attached directly to the main variator. The axial compensation of the elastic deformations caused by the contact pressure takes place via the lamellar toothing of the lamellar supports; However, since the axial movement of the slats causes frictional forces that the load distribution, and thus the stability of the Varia ¬ tors affect it is proposed according to a further feature of the invention that the slats πerschicht with a reinforcing coating, for example a Nitrocarbu- or a chromium layer are provided, whereby the abovementioned friction forces are minimized and one rigid combination of disc carrier and variator main shaft is made possible.
Die versteifenden Beschichtungen fuhren hierbei zu niedrigen Reibwerten und damit zu sehr geringen axialenThe stiffening coatings lead to low coefficients of friction and thus to very low axial ones
Storkraften, sodass eine negative Beeinflussung der Stabilität des Variators im Reibradgetriebe nicht mehr gegebenStork forces, so that a negative influence on the stability of the variator in the friction gear no longer exists
Gleichzeitig hat eine derartige Beschichtung den Vorteil einer hohen Widerstandsfähigkeit, sodass auch hohe Belastungen in der Lamellenverzahnung problemlos über eine lange Zeit ausgehalten werden.At the same time, such a coating has the advantage of high resistance, so that even high loads in the lamellar toothing can be endured without problems over a long period of time.
Im folgenden wird die Erfindung anhand der Zeichnung naher erläutert, in der schematisch ein Teilschnitt durch eine erfindungsgemaße Getriebeeinheit dargestellt ist.The invention is explained in more detail below with reference to the drawing, in which a partial section through a transmission unit according to the invention is shown schematically.
Da derartige Getriebeeinheiten dem Fachmann gut be- kannt sind, sind n diesem Teilschnitt nur die für das Verständnis der Erfindung notwendigen Bauteile dargestellt und mit Bezugszeichen versehen.Since such gear units are well known to the person skilled in the art, only the components necessary for understanding the invention are shown and provided with reference numerals in this partial section.
Die Getriebeeinheit besteht in herkömmlicher Weise aus einem Gehäuse, einer motorseitig angeordneten Ölversorgung mit Olpumpe sowie einem Anfahrelement 2 in Form einer Lamellenkupplung, die einen Außenlamellentrager 4 aufweist, der mit parallel zueinander angeordneten sich in radialer Richtung nach innen erstreckenden Lamellen versehen ist sowie einen Innenlamellentrager , der mit einer Anzahl von parallel zueinander angeordneten sich m radialer Richtung nach außen erstreckenden Lamellen versehen ist, wobei diese Lamellen eine Lamellenverzahnung bilden. Mit 6 und 7 sind zwei halbtoroid-formige einander zugewandten Scheiben bezeichnet, die Teil des Variators des Reibradgetriebes sind, welches dem Anfahrelement 2 nachgeordnet ist.In a conventional manner, the gear unit consists of a housing, an oil supply with oil pump arranged on the engine side, and a starting element 2 in the form of a multi-plate clutch which has an outer plate carrier 4, which is provided with plates arranged parallel to one another and extend inwards in the radial direction, and an inner plate carrier, which is provided with a number of lamellae extending parallel to one another and extending in the radial direction, these lamellae forming a lamella toothing. 6 and 7 designate two semi-toroidal disks facing each other, which are part of the variator of the friction gear, which is arranged after the starting element 2.
Zur Verringerung der durch die hohen Anpreßkrafte auf den Variator in der Getriebeeinheit bedingten Deformation ist nun zum einen der Außenlamellentrager 4 direkt mit der VariatorhauptweUe 5 verbunden, sodass die durch die An- preßkrafte hervorgerufenen Deformationen erheblich verringert werden.In order to reduce the deformation caused by the high contact forces on the variator in the gear unit, the outer disk carrier 4 is now directly connected to the variator main unit 5, so that the deformations caused by the contact forces are considerably reduced.
Des weiteren ist erfmdungsgemaß vorgesehen, dass die Lamellenverzahnung des Außenlamellentragers, optional auch des Innenlamellentragers mit einer versteifenden und zugleich die Reibwerte herabsetzenden Beschichtung versehen sind, beispielsweise eine Nitrocarbunerbeschichtung oder eine Chrombeschichtung, die zu einer starren Kombination der Bauteile aus Lamellentrager und VariatorhauptweUe we- sentlich beitragen.Furthermore, it is provided according to the invention that the lamellar toothing of the outer lamellar carrier, optionally also of the inner lamellar carrier, is provided with a stiffening and at the same time reducing the coefficient of friction, for example a nitrocarbuner coating or a chrome coating, which contribute significantly to a rigid combination of the components comprising the lamellar carrier and the variator ,
Gleichzeitig werden durch diese Beschichtungen auf den Lamellenverzahnungen niedrige Reibwerte gewährleistet, wodurch die axialen Storkrafte verringert werden. Aufgrund der hohen Widerstandsfähigkeit derartiger Beschichtungen können hohe Belastungen in der Lamellenverzahnung dauerhaft schadlos ertragen werden. BezugszeichenAt the same time, these coatings on the lamellar toothing ensure low coefficients of friction, which reduces the axial stiffness. Due to the high resistance of such coatings, high loads in the lamellar toothing can be endured permanently without damage. reference numeral
1 Gehäuse 2 Anfahrelement1 housing 2 starting element
3 Eingangswelle3 input shaft
4 Außenlamellentrager4 outer plate carriers
5 Hauptwelle5 main shaft
6 Eingangsscheibe 7 Ausgangsscheibe 6 input disc 7 output disc

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Getriebeelement insbesondere für Kraftfahrzeuge, mit einem Gehäuse, mit einer Antriebswelle, mit einer Abtriebswelle und mit einer Anordnung zur Veränderung des Übersetzungsverhältnisses zwischen der Antriebswelle und der Abtriebswelle in Form eines einen Variator aufweisenden stufenlosen Reibradgetriebes und mit einem Anfahrelement in Form einer Lamellenkupplung, die einen Innenlamellentra- ger mit radial sich nach außen erstreckenden Lamellen und einen Außenlamellentrager mit radial sich nach innen erstreckenden Lamellen aufweist, dadurch g e k e n n z e i c h n e t , dass der Außenlamellentrager (4) direkt an der VariatorhauptweUe (5) befestigt ist und dass die Lamellenverzahnung des Außenlamellentragers und/oder des Innenlamellentragers mit einer diese versteifenden Beschichtung versehen sind.1.Gearbox element, in particular for motor vehicles, with a housing, with an input shaft, with an output shaft and with an arrangement for changing the transmission ratio between the input shaft and the output shaft in the form of a continuously variable friction gear transmission having a variator and with a starting element in the form of a multi-plate clutch which has an inner plate carrier with radially outwardly extending plates and an outer plate carrier with radially inwardly extending plates, characterized in that the outer plate carrier (4) is fastened directly to the variator main unit (5) and that the plate teeth of the outer plate carrier and / or of the inner disk carrier are provided with a stiffening coating.
2. Getriebeeinheit nach Anspruch 1, dadurch g e ¬ k e n n z e i c h n e t , dass die Beschichtung eine Ni- trocarbuπerbeschichtung ist.2. Gear unit according to claim 1, characterized ¬ indicates that the coating is a Nitrocarbuπer coating.
3. Getriebeeinheit nach Anspruch 1, dadurch g e - k e n n z e i c h n e t , dass die Beschichtung eine Chrombeschichtung ist. 3. Gear unit according to claim 1, characterized in that the coating is a chrome coating.
PCT/EP2001/001881 2000-02-25 2001-02-20 Transmission unit WO2001063148A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10008891.0 2000-02-25
DE2000108891 DE10008891A1 (en) 2000-02-25 2000-02-25 Continuously variable friction gear transmission (CVT) unit with multi disc clutch, especially for motor vehicles, has outer disc support secured directly to main shaft in variator

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WO2001063148A1 true WO2001063148A1 (en) 2001-08-30

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DE (1) DE10008891A1 (en)
WO (1) WO2001063148A1 (en)

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CN102518769A (en) * 2005-07-23 2012-06-27 卢克摩擦片和离合器两合公司 Power-splitting gearbox with several ratio ranges with steplessly adjustable ratios

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US5073159A (en) * 1989-05-16 1991-12-17 Nippon Seiko Kabushiki Kaisha Vehicle transmission
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DE19826096A1 (en) * 1998-06-12 1999-12-16 Zahnradfabrik Friedrichshafen Infinitely variable wheel and disk drive gear has input shaft directly fixed
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Publication number Priority date Publication date Assignee Title
CN102518769A (en) * 2005-07-23 2012-06-27 卢克摩擦片和离合器两合公司 Power-splitting gearbox with several ratio ranges with steplessly adjustable ratios

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