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WO2008101878A1 - Guide wheel module for a torque converter - Google Patents

Guide wheel module for a torque converter Download PDF

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Publication number
WO2008101878A1
WO2008101878A1 PCT/EP2008/051878 EP2008051878W WO2008101878A1 WO 2008101878 A1 WO2008101878 A1 WO 2008101878A1 EP 2008051878 W EP2008051878 W EP 2008051878W WO 2008101878 A1 WO2008101878 A1 WO 2008101878A1
Authority
WO
WIPO (PCT)
Prior art keywords
groove
freewheel
leitradnabe
guide wheel
leitradmodul
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2008/051878
Other languages
German (de)
French (fr)
Inventor
Tomas Smetana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler KG filed Critical Schaeffler KG
Publication of WO2008101878A1 publication Critical patent/WO2008101878A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
    • F16D1/0858—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to the elasticity of the hub (including shrink fits)
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • 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
    • F16H41/00—Rotary fluid gearing of the hydrokinetic type
    • F16H41/24—Details
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D2001/062—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end characterised by adaptors where hub bores being larger than the shaft
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • 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
    • F16H41/00—Rotary fluid gearing of the hydrokinetic type
    • F16H41/24—Details
    • F16H2041/246—Details relating to one way clutch of the stator

Definitions

  • the invention relates to a suitable for a hydraulic torque converter Leitradmodul comprising a freewheel and a Leitradnabe.
  • a hydraulic torque converter which has a stator whose hub is non-rotatably connected to a freewheel outer ring, is known for example from DE 197 36 874 A1.
  • the freewheel outer ring has a corrugation running in the axial direction, through which a so-called light form-closing between Leitradnabe and freewheel outer ring should be formed, due to the low form-fitting depth of the corrugation and the plurality of small radial projections or depressions, the transmission of moments at many Make the circumference.
  • a hydraulic torque converter 1 then has a pump wheel 4 driven by a drive shaft 2, permanently connected to a housing 3, a turbine wheel 5, and a guide wheel 6 arranged axially between the pump wheel 4 and the turbine wheel 5. While the radially outer edge of the stator 6 is formed as Leitradaußenring 7, located at the inner edge of the stator 6, a freewheel 8.
  • the freewheel 8 has rollers as clamping elements 9, which are arranged between a freewheel inner ring 10 and a freewheel outer ring 11.
  • the outer ring 11 of the freewheel 8 is rotatably connected to a Leitradnabe 12, which are followed by Leitradschaufeln 13.
  • the freewheel 8 supports the Leitradnabe 12 in the conversion region of the torque converter 1 relative to a shaft fixed to the housing, while in the coupling region of the torque converter 1, the stator 6 is rotatable.
  • the invention has for its object to provide a stress-friendly and very easy to assemble connection between a freewheel outer ring and a Leitradnabe a hydraulic torque converter.
  • a Leitradmodul with the features of claim 1.
  • a suitable arrangement for a hydraulic torque converter understood that includes a freewheel, in particular a roller freewheel, and a non-rotatably connected to an outer ring of the freewheel Leitradnabe.
  • the Leitradnabe has at its outer periphery in the axial direction extending grooves, which allow the positive connection of the Leitradnabe with a stator.
  • Each groove has, viewed in cross-section, lateral, substantially in the radial direction groove flanks and arranged between these groove bottom.
  • This groove base formed by the surface of the Leitradnabe describes a concave curved, ie inwardly curved, in particular elliptical profile.
  • This profile contributes significantly to the equalization of mechanical stresses that occur through the torque transmission between the stator and the Leitradnabe in these parts.
  • Embodiments have proven to be particularly advantageous in which the ratio between the large semiaxis and the small semiaxis of the elliptical profile of the groove base is at least four and at most is eight.
  • the elliptical profile extends over the entire width of the groove bottom.
  • the depth of the groove measured in the radial direction of the stator hub is in a preferred embodiment at least 30% and at most 40% of the width of the groove measured in the circumferential direction.
  • Sintered materials are particularly suitable for producing the stator hub.
  • the guide wheel connected in a form-fitting manner to the guide wheel hub by means of the profiled grooves according to the invention can be produced particularly efficiently from plastic.
  • FIG. 1 shows a stator hub for a hydraulic torque converter
  • FIG. 2 shows the guide wheel hub according to FIG. 1 in cross section
  • FIG. 3 shows the stator hub according to FIG. 1 in a perspective view
  • FIG. 4 shows a detail of the stator hub according to FIG. 1,
  • FIG. 5 shows an enlarged detail of the stator hub according to FIG. 1,
  • FIG. 6 is a sectional view of a stator connected to a stator, a freewheel exhibiting Leitradmodul, Figure 7 in a perspective view of the freewheel of the arrangement of Figure 6, and
  • FIG. 8 shows a hydraulic torque converter after
  • Figures 1 to 5 show in various views a Leitradnabe 12 for a hydraulic torque converter, with respect to the principle function of Figure 8 is referenced.
  • the interaction of the Leitradnabe 12 with other functional elements is apparent from Figures 6 and 7:
  • Radial within the Leitradnabe 12 is a freewheel 8 with a free-end finring 10, a freewheel outer ring 11, and between the rings 10, 11 arranged pinch rollers 9.
  • the freewheel outer ring 11 is formed as a non-cutting formed sheet metal part.
  • 11 clamping ramps are formed in the inner surface of the outer ring, against which the clamping rollers 9.
  • the width of the groove bottom 17 and thus also the groove 15 is designated H.
  • the depth t of the groove 15 corresponds to half the difference between the maximum diameter D A of the Leitradna- Be 12 and the minimum diameter D F , which indicates the distance between two on the circumference of the Leitradnabe 12 opposite grooves 15.
  • the groove base 17 describes a concavely curved, elliptical profile which merges into the groove flanks 16 without kinking.
  • the large semiaxis b of the elliptical profile corresponds to half the width H of the groove 15, the small one
  • Half axis a about 9% of the width H.
  • the minimum radius at the transition between the groove bottom 17 and a groove flank 16 is 8% of the groove width H.
  • Schuschneidungen at the transition between groove bottom 17 and groove flank 16 are avoided.
  • In the individual grooves 15 each engages a correspondingly shaped

Landscapes

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

Abstract

A guide wheel comprises a free wheel (8) and a guide wheel hub (12) connected non-rotatably to the outer ring (11) thereof, wherein on the outer circumference of the guide wheel hub (12) grooves (15) are configured for a positive connection to the guide wheel (6), the grooves extending in the axial direction and each comprising a concavely curved groove base (17).

Description

Bezeichnung der Erfindung Name of the invention

Leitradmodul für einen DrehmomentwandlerDiffuser module for a torque converter

Beschreibungdescription

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein für einen hydraulischen Drehmomentwandler geeignetes Leitradmodul, welches einen Freilauf und eine Leitradnabe umfasst.The invention relates to a suitable for a hydraulic torque converter Leitradmodul comprising a freewheel and a Leitradnabe.

Hintergrund der ErfindungBackground of the invention

Ein hydraulischer Drehmomentwandler, welcher ein Leitrad aufweist, dessen Nabe drehfest mit einem Freilaufaußenring verbunden ist, ist beispielsweise aus der DE 197 36 874 A1 bekannt. Der Freilaufaußenring weist eine in Achsrichtung verlaufende Riffelung auf, durch die ein so genannter leichter Form- Schluss zwischen Leitradnabe und Freilaufaußenring gebildet sein soll, wobei aufgrund der geringen Formschlusstiefe der Riffelung und der Vielzahl kleiner radialer Vorsprünge bzw. Vertiefungen die Übertragung von Momenten an sehr vielen Stellen des Umfangs erfolgt.A hydraulic torque converter, which has a stator whose hub is non-rotatably connected to a freewheel outer ring, is known for example from DE 197 36 874 A1. The freewheel outer ring has a corrugation running in the axial direction, through which a so-called light form-closing between Leitradnabe and freewheel outer ring should be formed, due to the low form-fitting depth of the corrugation and the plurality of small radial projections or depressions, the transmission of moments at many Make the circumference.

Hinsichtlich der prinzipiell bekannten Funktion eines hydraulischen Drehmomentwandlers wird auf die Figur 8 verwiesen. Ein hydraulischer Drehmomentwandler 1 weist danach ein über eine Antriebswelle 2 angetriebenes, fest mit einem Gehäuse 3 verbundenes Pumpenrad 4, ein Turbinenrad 5, sowie ein axial zwischen dem Pumpenrad 4 und dem Turbinenrad 5 angeordnetes Leit- rad 6 auf. Während der radial äußere Rand des Leitrades 6 als Leitradaußenring 7 ausgebildet ist, befindet sich am inneren Rand des Leitrades 6 ein Freilauf 8. Der Freilauf 8 weist Rollen als Klemmelemente 9 auf, welche zwischen einem Freilaufinnenring 10 und einem Freilaufaußenring 11 angeordnet sind. Der Außenring 11 des Freilaufs 8 ist drehfest verbunden mit einer Leitradnabe 12, an welche sich Leitradschaufeln 13 anschließen. Der Freilauf 8 stützt die Leitradnabe 12 im Wandlungsbereich des Drehmomentwandlers 1 gegenüber einer gehäusefesten Welle ab, während im Kupplungsbereich des Drehmo- mentwandlers 1 das Leitrad 6 verdrehbar ist.With regard to the principle known function of a hydraulic torque converter, reference is made to FIG. A hydraulic torque converter 1 then has a pump wheel 4 driven by a drive shaft 2, permanently connected to a housing 3, a turbine wheel 5, and a guide wheel 6 arranged axially between the pump wheel 4 and the turbine wheel 5. While the radially outer edge of the stator 6 is formed as Leitradaußenring 7, located at the inner edge of the stator 6, a freewheel 8. The freewheel 8 has rollers as clamping elements 9, which are arranged between a freewheel inner ring 10 and a freewheel outer ring 11. The outer ring 11 of the freewheel 8 is rotatably connected to a Leitradnabe 12, which are followed by Leitradschaufeln 13. The freewheel 8 supports the Leitradnabe 12 in the conversion region of the torque converter 1 relative to a shaft fixed to the housing, while in the coupling region of the torque converter 1, the stator 6 is rotatable.

Aufgabe der ErfindungObject of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine beanspruchungsgerechte und besonders montagefreundliche Verbindung zwischen einem Freilaufaußenring und einer Leitradnabe eines hydraulischen Drehmomentwandlers anzugeben.The invention has for its object to provide a stress-friendly and very easy to assemble connection between a freewheel outer ring and a Leitradnabe a hydraulic torque converter.

Zusammenfassung der ErfindungSummary of the invention

Diese Aufgabe wird erfindungsgemäß gelöst durch ein Leitradmodul mit den Merkmalen des Anspruchs 1. Unter einem Leitradmodul wird hierbei eine für einen hydraulischen Drehmomentwandler geeignete Anordnung verstanden, welche einen Freilauf, insbesondere einen Rollenfreilauf, sowie eine drehfest mit einem Außenring des Freilaufs verbundene Leitradnabe umfasst. Die Leitradnabe weist an deren Außenumfang in Axialrichtung verlaufende Nuten auf, welche die formschlüssige Verbindung der Leitradnabe mit einem Leitrad ermöglichen. Jede Nut weist, im Querschnitt betrachtet, seitliche, im Wesentli- chen in radiale Richtung verlaufende Nutflanken sowie einen zwischen diesen angeordneten Nutgrund auf. Dieser durch die Oberfläche der Leitradnabe gebildete Nutgrund beschreibt ein konkav gekrümmtes, d.h. nach innen gewölbtes, insbesondere elliptisches Profil. Dieses Profil trägt maßgeblich zur Vergleichmäßigung mechanischer Spannungen bei, welche durch die Drehmo- mentübertragung zwischen dem Leitrad und der Leitradnabe in diesen Teilen auftreten. Als besonders vorteilhaft haben sich Ausführungsformen erwiesen, in denen das Verhältnis zwischen der großen Halbachse und der kleinen Halbachse des elliptischen Profils des Nutgrunds mindestens vier und höchstens acht beträgt. Vorzugsweise erstreckt sich das elliptische Profil über die gesamte Breite des Nutgrundes. Die in Radialrichtung der Leitradnabe gemessene Tiefe der Nut beträgt in bevorzugter Ausgestaltung mindestens 30% und höchstens 40% der in Umfangshchtung gemessenen Breite der Nut.This object is achieved by a Leitradmodul with the features of claim 1. Under a stator is in this case a suitable arrangement for a hydraulic torque converter understood that includes a freewheel, in particular a roller freewheel, and a non-rotatably connected to an outer ring of the freewheel Leitradnabe. The Leitradnabe has at its outer periphery in the axial direction extending grooves, which allow the positive connection of the Leitradnabe with a stator. Each groove has, viewed in cross-section, lateral, substantially in the radial direction groove flanks and arranged between these groove bottom. This groove base formed by the surface of the Leitradnabe describes a concave curved, ie inwardly curved, in particular elliptical profile. This profile contributes significantly to the equalization of mechanical stresses that occur through the torque transmission between the stator and the Leitradnabe in these parts. Embodiments have proven to be particularly advantageous in which the ratio between the large semiaxis and the small semiaxis of the elliptical profile of the groove base is at least four and at most is eight. Preferably, the elliptical profile extends over the entire width of the groove bottom. The depth of the groove measured in the radial direction of the stator hub is in a preferred embodiment at least 30% and at most 40% of the width of the groove measured in the circumferential direction.

Zur Herstellung der Leitradnabe eignen sich besonders Sinterwerkstoffe, insbesondere Sintermetalle. Das mittels der erfindungsgemäß profilierten Nuten formschlüssig mit der Leitradnabe verbundene Leitrad ist besonders rationell aus Kunststoff herstellbar.Sintered materials, in particular sintered metals, are particularly suitable for producing the stator hub. The guide wheel connected in a form-fitting manner to the guide wheel hub by means of the profiled grooves according to the invention can be produced particularly efficiently from plastic.

Nachfolgend wird die Erfindung anhand einer Zeichnung näher erläutert. Hierin zeigen:The invention will be explained in more detail with reference to a drawing. Herein show:

Kurze Beschreibung der ZeichnungShort description of the drawing

Figur 1 eine Leitradnabe für einen hydraulischen Drehmomentwandler,FIG. 1 shows a stator hub for a hydraulic torque converter;

Figur 2 die Leitradnabe nach Figur 1 im Querschnitt,FIG. 2 shows the guide wheel hub according to FIG. 1 in cross section,

Figur 3 die Leitradnabe nach Figur 1 in einer perspektivischen Ansicht,3 shows the stator hub according to FIG. 1 in a perspective view, FIG.

Figur 4 ein Detail der Leitradnabe nach Figur 1 ,FIG. 4 shows a detail of the stator hub according to FIG. 1,

Figur 5 ein vergrößertes Detail der Leitradnabe nach Figur 1 ,FIG. 5 shows an enlarged detail of the stator hub according to FIG. 1,

Figur 6 in einer Schnittdarstellung ein mit einem Leitrad verbundenes, einen Freilauf aufweisendes Leitradmodul, Figur 7 in einer perspektivischen Darstellung den Freilauf der Anordnung nach Figur 6, und6 is a sectional view of a stator connected to a stator, a freewheel exhibiting Leitradmodul, Figure 7 in a perspective view of the freewheel of the arrangement of Figure 6, and

Figur 8 einen hydraulischen Drehmomentwandler nach demFIG. 8 shows a hydraulic torque converter after

Stand der Technik.State of the art.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Die Figuren 1 bis 5 zeigen in verschiedenen Darstellungen ein Leitradnabe 12 für einen hydraulischen Drehmomentwandler, hinsichtlich dessen prinzipieller Funktion auf Figur 8 verwiesen wird. Die Zusammenwirkung der Leitradnabe 12 mit weiteren Funktionselementen geht aus den Figuren 6 und 7 hervor: Radial innerhalb der Leitradnabe 12 befindet sich ein Freilauf 8 mit einem Freilau- finnenring 10, einem Freilaufaußenring 11 , sowie zwischen den Ringen 10, 11 angeordneten Klemmrollen 9. Während der Freilaufinnenring 10 durch spangebende Verfahren hergestellt ist, ist der Freilaufaußenring 11 als spanlos umgeformtes Blechteil ausgebildet. In an sich bekannter Weise sind in die Innenoberfläche des Außenrings 11 Klemmrampen eingeformt, an welchen die Klemmrollen 9 anliegen. Die ständige Klemmbereitschaft des Freilaufs 8 ist durch einzelne Federn 14, welche jeweils eine Klemmrolle 9 mit einer Kraft in Richtung zu deren Klemmposition beaufschlagen, sichergestellt. In Figur 7 zeigt ein Pfeil die Richtung an, in welcher der Außenring 11 relativ zum hier nicht dargestellten Innenring 10 verdrehbar ist. Der Außenring 11 ist in die aus Sintermetall hergestellte Leitradnabe 12 einge- presst und damit drehfest mit dieser verbunden. Eine drehfeste Verbindung zwischen der Leitradnabe 12 und dem beispielsweise aus Kunststoff hergestellten Leitrad 6 ist durch eine Mehrzahl in Axialrichtung verlaufender Nuten 15 an der Außenoberfläche der Leitradnabe 12 gegeben. Jede Nut 15 weist, wie insbesondere aus Figur 5 hervorgeht, zwei Nutflanken 16 sowie einen zwischen diesen liegenden Nutgrund 17 auf. Die Breite des Nutgrundes 17 und damit auch der Nut 15 ist mit H bezeichnet. Die Tiefe t der Nut 15 entspricht der halben Differenz zwischen dem maximalen Durchmesser DA der Leitradna- be 12 und dem minimalen Durchmesser DF, welcher den Abstand zwischen zwei am Umfang der Leitradnabe 12 gegenüber liegenden Nuten 15 angibt.Figures 1 to 5 show in various views a Leitradnabe 12 for a hydraulic torque converter, with respect to the principle function of Figure 8 is referenced. The interaction of the Leitradnabe 12 with other functional elements is apparent from Figures 6 and 7: Radial within the Leitradnabe 12 is a freewheel 8 with a free-end finring 10, a freewheel outer ring 11, and between the rings 10, 11 arranged pinch rollers 9. During the freewheel inner ring 10 is produced by cutting process, the freewheel outer ring 11 is formed as a non-cutting formed sheet metal part. In known manner, 11 clamping ramps are formed in the inner surface of the outer ring, against which the clamping rollers 9. The constant clamping readiness of the freewheel 8 is ensured by individual springs 14, which each act on a pinch roller 9 with a force in the direction of its clamping position. In Figure 7, an arrow indicates the direction in which the outer ring 11 is rotatable relative to the inner ring 10, not shown here. The outer ring 11 is pressed into the guide wheel hub 12 made of sintered metal and thus connected to it in a torque-proof manner. A rotationally fixed connection between the Leitradnabe 12 and the stator made of plastic, for example, 6 is given by a plurality extending in the axial direction of grooves 15 on the outer surface of the stator hub 12. Each groove 15 has, as is apparent in particular from Figure 5, two groove flanks 16 and a lying between them groove bottom 17. The width of the groove bottom 17 and thus also the groove 15 is designated H. The depth t of the groove 15 corresponds to half the difference between the maximum diameter D A of the Leitradna- Be 12 and the minimum diameter D F , which indicates the distance between two on the circumference of the Leitradnabe 12 opposite grooves 15.

Der Nutgrund 17 beschreibt ein konkav gekrümmtes, elliptisches Profil, wel- ches ohne Knick in die Nutflanken 16 übergeht. Die große Halbachse b des elliptischen Profils entspricht der Hälfte der Breite H der Nut 15, die kleineThe groove base 17 describes a concavely curved, elliptical profile which merges into the groove flanks 16 without kinking. The large semiaxis b of the elliptical profile corresponds to half the width H of the groove 15, the small one

Halbachse a ca. 9% der Breite H. Der minimale Radius am Übergang zwischen dem Nutgrund 17 und einer Nutflanke 16 beträgt 8% der Nutbreite H. Hinter- schneidungen am Übergang zwischen Nutgrund 17 und Nutflanke 16 werden vermieden. In die einzelnen Nuten 15 greift jeweils ein entsprechend geformterHalf axis a about 9% of the width H. The minimum radius at the transition between the groove bottom 17 and a groove flank 16 is 8% of the groove width H. Hinterschneidungen at the transition between groove bottom 17 and groove flank 16 are avoided. In the individual grooves 15 each engages a correspondingly shaped

Steg ein, welcher einstückig mit dem Leitrad 6 aus Kunststoff hergestellt ist. Bridge, which is made in one piece with the stator 6 made of plastic.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1 Drehmomentwandler1 torque converter

2 Antriebswelle2 drive shaft

3 Gehäuse3 housing

4 Pumpenrad4 impeller

5 Turbinenrad5 turbine wheel

6 Leitrad6 stator

7 Leitradaußenring7 stator outer ring

8 Freilauf8 freewheel

9 Klemmrolle9 pinch roller

10 Innenring10 inner ring

11 Außenring11 outer ring

12 Leitradnabe12 stator hub

13 Leitradschaufel13 stator blade

14 Feder14 spring

15 Nut15 groove

16 Nutflanke16 groove flank

17 Nutgrund17 groove base

a Halbachse b Halbachsea semiaxis b semiaxis

DA DurchmesserDA diameter

DF DurchmesserD F diameter

H Breite t Tiefe H width t depth

Claims

Patentansprüche claims 1. Leitradmodul, mit einem Freilauf (8) und einer drehfest mit einem Au- ßenring (11 ) des Freilaufs (8) verbundenen Leitradnabe (12), wobei am Außenumfang der Leitradnabe (12) in Axialrichtung verlaufende Nuten (15) zur formschlüssigen Verbindung mit einem Leitrad (6) ausgebildet sind, dadurch gekennzeichnet, dass die Nuten (15) jeweils einen konkav gekrümmten Nutgrund (17) aufweisen.1. Leitradmodul, with a freewheel (8) and a non-rotatably connected to an outer ßenring (11) of the freewheel (8) Leitradnabe (12), wherein on the outer circumference of the Leitradnabe (12) extending in the axial direction of grooves (15) for the positive connection are formed with a stator (6), characterized in that the grooves (15) each have a concave groove bottom (17). 2. Leitradmodul nach Anspruch 1 , dadurch gekennzeichnet, dass der2. Leitradmodul according to claim 1, characterized in that the Nutgrund (17) ein elliptisches Profil beschreibt.Groove (17) describes an elliptical profile. 3. Leitradmodul nach Anspruch 2, dadurch gekennzeichnet, dass das Verhältnis (b/a) der beiden Halbachsen (b, a) des elliptischen Profils des Nutgrunds (17) mindestens vier und höchstens acht beträgt.3. Leitradmodul according to claim 2, characterized in that the ratio (b / a) of the two semi-axes (b, a) of the elliptical profile of the groove bottom (17) is at least four and at most eight. 4. Leitradmodul nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass sich das elliptische Profil über die gesamte Breite (H) des Nut- grunds (17) erstreckt.4. Leitradmodul according to claim 2 or 3, characterized in that the elliptical profile over the entire width (H) of the groove base (17) extends. 5. Leitradmodul nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die in Radialrichtung gemessene Tiefe (t) der Nut (15) mindestens 30% und höchstens 40% deren Breite (H) beträgt.5. Leitradmodul according to one of claims 1 to 4, characterized in that the measured in the radial direction depth (t) of the groove (15) is at least 30% and at most 40% whose width (H). 6. Leitradmodul nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Leitradnabe (12) aus einem Sinterwerkstoff gefertigt ist. 6. Leitradmodul according to one of claims 1 to 5, characterized in that the Leitradnabe (12) is made of a sintered material.
PCT/EP2008/051878 2007-02-24 2008-02-15 Guide wheel module for a torque converter Ceased WO2008101878A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007009092A DE102007009092A1 (en) 2007-02-24 2007-02-24 Diffuser module for a torque converter
DE102007009092.9 2007-02-24

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WO2008101878A1 true WO2008101878A1 (en) 2008-08-28

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WO (1) WO2008101878A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260587A (en) * 1991-10-16 1993-04-21 Textron Inc Elliptical lobed drive system
US5378101A (en) * 1992-12-22 1995-01-03 Textron Inc. Tamper-proof drive system based upon multi-lobular configuration
WO1996005101A1 (en) * 1994-08-16 1996-02-22 Spi (R & D) Pty. Ltd. Mounting assembly for propellers
DE19736874A1 (en) 1997-08-26 1999-03-11 Mannesmann Sachs Ag Injection molded guide wheel for torque converter
WO2005121581A1 (en) * 2004-06-14 2005-12-22 Ernst Grob Ag Grooved profile for a hub shaft connection
EP1715218A1 (en) * 2005-04-20 2006-10-25 LuK Lamellen und Kupplungsbau Beteiligungs KG Hydrodynamic torque converter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231608A1 (en) * 2002-07-12 2004-01-29 Daimlerchrysler Ag Hydrodynamic torque converter with a stator and manufacturing method for such

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260587A (en) * 1991-10-16 1993-04-21 Textron Inc Elliptical lobed drive system
US5378101A (en) * 1992-12-22 1995-01-03 Textron Inc. Tamper-proof drive system based upon multi-lobular configuration
WO1996005101A1 (en) * 1994-08-16 1996-02-22 Spi (R & D) Pty. Ltd. Mounting assembly for propellers
DE19736874A1 (en) 1997-08-26 1999-03-11 Mannesmann Sachs Ag Injection molded guide wheel for torque converter
WO2005121581A1 (en) * 2004-06-14 2005-12-22 Ernst Grob Ag Grooved profile for a hub shaft connection
EP1715218A1 (en) * 2005-04-20 2006-10-25 LuK Lamellen und Kupplungsbau Beteiligungs KG Hydrodynamic torque converter

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