WO2020164652A1 - Clamping roller freewheel - Google Patents

Clamping roller freewheel Download PDF

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Publication number
WO2020164652A1
WO2020164652A1 PCT/DE2019/101046 DE2019101046W WO2020164652A1 WO 2020164652 A1 WO2020164652 A1 WO 2020164652A1 DE 2019101046 W DE2019101046 W DE 2019101046W WO 2020164652 A1 WO2020164652 A1 WO 2020164652A1
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WO
WIPO (PCT)
Prior art keywords
section
clamping roller
spring element
clamping
spring
Prior art date
Application number
PCT/DE2019/101046
Other languages
German (de)
French (fr)
Inventor
Toshiaki Yagi
Original Assignee
Schaeffler Technologies AG & Co. 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 Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2020164652A1 publication Critical patent/WO2020164652A1/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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • 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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D2041/0605—Spring 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/06—Lubrication details not provided for in group F16D13/74

Definitions

  • the invention relates to an overrunning clutch designed as a clamping roller freewheel according to the preamble of claim 1.
  • Such an overrunning clutch is known, for example, from DE 10 2009 018 965 A1.
  • the known overrunning clutch has clamping rollers arranged between an inner ring and an outer ring, one of the rings having clamping ramps that interact with the clamping rollers.
  • Each pinch roller is individually sprung against a clamping ramp by means of a leaf spring bent several times.
  • Non-locking overrunning clutches such as clamping roller freewheels are usually operated with lubricant, which counteracts the wear and tear of mechanically highly stressed components.
  • the invention is based on the object of specifying a clamping roller freewheel that has been further developed compared to the prior art mentioned, in particular with regard to lubrication-related aspects.
  • This clamping roller freewheel comprises a number of clamping rollers in a basic concept known per se, each of which is spring-loaded against a clamping ramp by means of a spring element, which is provided by a coupling element, in particular a ring, the spring element being expandable in the manner of a pull-type harness and a compressible leaf spring is formed, which is held on a cage by means of a holding section having a U-shaped cross section.
  • the spring element which describes a strip shape that has been bent several times, has a central section which is narrower than the two end sections, namely the U-shaped holding section and a contact section of the spring element provided for contacting a clamping roller.
  • the freewheeling roller can be designed as a freewheel that cancels centrifugal forces.
  • the ver younger middle section extends over more than two mutually inclined legs of the spring element.
  • the width of the middle section is preferably not more than half, but more than a quarter, in particular more than a third, of the width of each end section.
  • the width of the end section held on the cage is preferably the same as the width of the second end section, that is to say that end section which contacts the clamping roller sprung by the spring element.
  • the end section designed as a holding section, that is to say fixed on the cage, supports, according to a possible embodiment, over its entire width a clamping roller adjacent to the clamping roller sprung by the spring element in at least one radial direction. Preferably, a support is given in both radial directions.
  • the mounting of the spring element on the cage thus agrees with the Ausgestal device according to the aforementioned DE 10 2009 018 965 A1.
  • the coupling element by which the clamping ramps are formed, can either be designed as an outer ring or as an inner ring of the clamping roller freewheel. Instead of an inner ring, a solid shaft can also be provided. If the clamping ramps are located on the outer ring, the cage is preferably formed directly by the outer ring.
  • roller freewheel is suitable, inter alia, for use in an internal combustion engine, for example a motorcycle.
  • the free-running pinch roller can be used in a torque converter or elsewhere in the drive train of a motor vehicle, in particular in a transmission.
  • FIG. 2 shows a detail of the arrangement according to FIG. 1, 3 shows a spring element of the clamping roller freewheel in plan view,
  • a clamping roller freewheel designated overall by the reference numeral 1, has two rings, namely an inner ring (not shown) and an outer ring 2.
  • Pinch rollers 3 contact the inner ring on the one hand and pinch ramps 4, which are formed by the outer ring 2, on the other.
  • Each pinch roller 3 is assigned a Federele element 5 which is held on a cage 6.
  • each spring element 5 is fixed to a cage web 7, the cage webs 7 in themonysbei play directly through material that was bent out of the outer ring 2 de are formed.
  • the cage 6 is thus an integral part of the outer ring 2.
  • the freewheel device FR of the inner ring opposite the outer ring 2 is indicated in FIG. 1 by an arrow.
  • the outer ring 2 like the inner ring, represents a coupling element of the clamping roller freewheel 1.
  • Each spring element 5 is designed as a leaf spring bent several times. That portion of the spring element 5 which is fixed on the cage web 7 is referred to as Flalteab section 8 and has a U-shaped cross section.
  • the cross-sectional design of the U-shaped pleat section 8 is known in principle from DE 10 2009 018 965 A1.
  • the U-shaped fold section 8 is also referred to as the first end section of the spring element 5.
  • the second end section 9 opposite the pleat section 8 contacts the clamping roller 3, which is spring-loaded by the spring element 5.
  • two securing tongues 1 1, 12 project in a straight extension of the U-base, designated by 13, of the folded section 8 beyond the cage web 7.
  • the locking tongues 1 1, 12 he thus extend essentially in the circumferential direction of the clamping roller freewheel 1, wherein they support the pinch roller 3, which is adjacent to the cage web 7, radially outward.
  • the end tongue 14 represents a leg of the U-profile of the holding section 8 and rests on the cage web 7.
  • the end tongue 14 has an inner end section 15 which protrudes beyond the cage web 7 and which is bent in the direction of the pinch roller 3 and thus forms a radially inwardly effective support relative to the pinch roller 3.
  • a barb 16 protrudes from the inner end section 15 in the direction of the cage web 7, so that the U-shaped holding section 8 is fixed on the cage web 7 with a positive fit.
  • a contact leg 17 connects, wel cher is arranged approximately parallel to the end tongue 14 and also the cage web 7 con tacted.
  • the contact leg 17 extends radially inward up to a first kink 18 of the spring element 5.
  • Further kinks of the spring element 5 are denoted by 19, 20, 21, 22, 23.
  • the between the kinks 18 to 23 lying lowing sections of the spring element 5 are designated as legs 25, 26, 27, 28, 29 be.
  • the second end section 9, which is also referred to as a contact section, connects to the kink 23, which is furthest away from the holding section 8.
  • the second end section 9 describes a slightly bent shape that is adapted to the curvature of the pinch roller 3.
  • a wide V-shaped bend within the end section 9, which can be seen in FIG. 2, is denoted by 24.
  • the area of the spring element 5 lying between the end sections 8, 9 is referred to as the middle section 30. All legs 25 to 29 are assigned to the middle section 30.
  • the width of the Federelemen tes 5 to be measured in the axial direction of the clamping roller freewheel 1 is denoted by Bv.
  • the width Bv corresponds to the width of the two end sections 8, 9.
  • the width of the center section, designated BR is cut 30 to almost half. Due to the reduced width BR, additional space is provided within the space in which the spring element 5 is arranged, in which lubricant can be received and through which lubricant can be promoted.
  • the additional space that is to say free space, which exists laterally next to the central gate 30, also improves the mobility of the spring element 5 in comparison to conventional, multiple-bent leaf springs with a uniform width.
  • the structure of the clamping roller freewheel 1 which comprises the spring elements 5 described with a centrally reduced width BR, is not fundamentally changed. Due to the widened end portions 8, 9 compared to the central portion 30, a springing of the Klemmrol len 3 is given practically over its entire width. Likewise, the backup tongues 11, 12 support the pinch rollers 3 practically over their full length. In the case of the inner end portion 15, the clamping roller 3 is supported over more than half of its width to be measured in the axial direction.

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

Abstract

A clamping roller freewheel (1) comprises clamping rollers (3) which are spring-loaded in each case by means of a spring element (5) against a clamping ramp (4) which is provided by way of a clutch element (2), wherein the spring element (5) is configured as a multiply bent leaf spring which is held on a cage (6) by means of a holding section (8) of U-shaped cross section. The spring element (5) has a centre section (30) which is narrower than the two end sections (8, 9), namely the U-shaped holding section (8) and a bearing section (9) of the spring element (5), which bearing section (9) is provided for making contact with a clamping roller (3).

Description

Klemmrollenfreilauf Pinch roller freewheel
Die Erfindung betrifft eine als Klemmrollenfreilauf ausgebildete Freilaufkupplung nach dem Oberbegriff des Anspruchs 1. The invention relates to an overrunning clutch designed as a clamping roller freewheel according to the preamble of claim 1.
Eine derartige Freilaufkupplung ist beispielsweise aus der DE 10 2009 018 965 A1 bekannt. Die bekannte Freilaufkupplung weist zwischen einem Innenring und einem Außenring angeordnete Klemmrollen auf, wobei einer der Ringe mit den Klemmrollen zusammenwirkende Klemmrampen aufweist. Jede Klemmrolle ist einzeln mittels einer mehrfach gebogenen Blattfeder gegen eine Klemm rampe angefedert. Such an overrunning clutch is known, for example, from DE 10 2009 018 965 A1. The known overrunning clutch has clamping rollers arranged between an inner ring and an outer ring, one of the rings having clamping ramps that interact with the clamping rollers. Each pinch roller is individually sprung against a clamping ramp by means of a leaf spring bent several times.
Ein weiterer Klemmrollenfreilauf mit Federelementen, welche als mehrfach gebogene Blattfedern ausgebildet sind, ist in der DE 10 2011 005 245 A1 beschrieben. Die Fe derelemente sind in einem Klemmrollenkäfig aufgenommen, welcher in diesem Fall eine integrierte Dämpfungseinrichtung aufweist. Another clamping roller freewheel with spring elements, which are designed as leaf springs bent several times, is described in DE 10 2011 005 245 A1. The spring elements are received in a clamping roller cage, which in this case has an integrated damping device.
Die DE 199 37 437 A1 offenbart einen Klemmrollenfreilauf, bei welchem nicht nur die Klemmrollen angefedert sind, sondern auch der Käfig angefedert ist. DE 199 37 437 A1 discloses a clamping roller freewheel in which not only the clamping rollers are spring-loaded, but also the cage is spring-loaded.
Aus der DE 100 57 175 A1 ist ein Kunststoffkäfig für einen Klemmrollenfreilauf be kannt. In diesem Fall sind Federelemente direkt durch den Kunststoffkäfig gebildet. From DE 100 57 175 A1 a plastic cage for a clamping roller freewheel is known. In this case, spring elements are formed directly by the plastic cage.
Nicht rastende Freilaufkupplungen wie Klemmrollenfreiläufe werden üblicherweise mit Schmiermittel betrieben, womit einem Verschleiß mechanisch stark beanspruchter Komponenten entgegengewirkt wird. Der Erfindung liegt die Aufgabe zugrunde, einen gegenüber dem genannten Stand der Technik insbesondere unter schmierungstechnischen Aspekten weiterentwickelten Klemmrollenfreilauf anzugeben. Non-locking overrunning clutches such as clamping roller freewheels are usually operated with lubricant, which counteracts the wear and tear of mechanically highly stressed components. The invention is based on the object of specifying a clamping roller freewheel that has been further developed compared to the prior art mentioned, in particular with regard to lubrication-related aspects.
Diese Aufgabe wird erfindungsgemäß gelöst durch einen Klemmrollenfreilauf mit den Merkmalen des Anspruchs 1 . According to the invention, this object is achieved by a clamping roller freewheel with the features of claim 1.
Dieser Klemmrollenfreilauf umfasst in an sich bekannter Grundkonzeption eine Anzahl Klemmrollen, welche jeweils mittels eines Federelementes gegen eine Klemmrampe angefedert sind, die durch ein Kupplungselement, insbesondere einen Ring, bereitge stellt wird, wobei das Federelement als mehrfach gebogene, in der Art einer Ziehhar monika expandierbare und komprimierbare Blattfeder ausgebildet ist, die mittels eines im Querschnitt U-förmigen Halteabschnitts an einem Käfig gehalten ist. This clamping roller freewheel comprises a number of clamping rollers in a basic concept known per se, each of which is spring-loaded against a clamping ramp by means of a spring element, which is provided by a coupling element, in particular a ring, the spring element being expandable in the manner of a pull-type harness and a compressible leaf spring is formed, which is held on a cage by means of a holding section having a U-shaped cross section.
Erfindungsgemäß weist das Federelement, welches insgesamt eine mehrfach abge knickte Streifenform beschreibt, einen Mittelabschnitt auf, welcher schmaler als die beiden Endabschnitte, nämlich der U-förmige Halteabschnitt und ein zur Kontaktie rung einer Klemmrolle vorgesehener Kontaktabschnitt, des Federelementes ist. According to the invention, the spring element, which describes a strip shape that has been bent several times, has a central section which is narrower than the two end sections, namely the U-shaped holding section and a contact section of the spring element provided for contacting a clamping roller.
Durch die Verjüngung des Mittelabschnitts des Federelementes wird ein freier Quer schnitt für Schmiermittel bereitgestellt. Überraschenderweise hat sich gezeigt, dass trotz der im Vergleich zu den Endabschnitten geringeren Breite des Mittelabschnitts die gewünschte mechanische Funktion des Federelementes ohne Einschränkung ge geben ist. Abhängig von der Auslegung des Federelementes kann der Klemmrollen freilauf als fliehkraftaufhebender Freilauf gestaltet sein. Due to the tapering of the central portion of the spring element, a free cross section is provided for lubricant. Surprisingly, it has been shown that despite the smaller width of the middle section compared to the end sections, the desired mechanical function of the spring element is given without restriction. Depending on the design of the spring element, the freewheeling roller can be designed as a freewheel that cancels centrifugal forces.
In bevorzugter Ausgestaltung erstreckt sich der gegenüber den Endabschnitten ver jüngte Mittelabschnitt über mehr als zwei schräg zueinander gestellte Schenkel des Federelementes. Hierbei beträgt die Breite des Mittelabschnitts vorzugsweise nicht mehr als die Hälfte, jedoch mehr als ein Viertel, insbesondere mehr als ein Drittel, der Breite eines jeden Endabschnitts. Die Breite des am Käfig gehaltenen Endabschnitts stimmt vorzugswei se mit der Breite des zweiten Endabschnitts, das heißt desjenigen Endabschnitts, welcher die durch das Federelement angefederte Klemmrolle kontaktiert, überein. In a preferred embodiment, the ver younger middle section extends over more than two mutually inclined legs of the spring element. Here, the width of the middle section is preferably not more than half, but more than a quarter, in particular more than a third, of the width of each end section. The width of the end section held on the cage is preferably the same as the width of the second end section, that is to say that end section which contacts the clamping roller sprung by the spring element.
Der als Halteabschnitt ausgebildete, das heißt am Käfig fixierte Endabschnitt stützt gemäß einer möglichen Ausgestaltung über seine gesamte Breite eine der durch das Federelement angefederten Klemmrolle benachbarte Klemmrolle in zumindest einer Radialrichtung ab. Vorzugsweise ist eine Abstützung in beiden Radialrichtungen ge geben. Die Halterung des Federelements am Käfig stimmt damit mit der Ausgestal tung nach der bereits genannten DE 10 2009 018 965 A1 überein. The end section designed as a holding section, that is to say fixed on the cage, supports, according to a possible embodiment, over its entire width a clamping roller adjacent to the clamping roller sprung by the spring element in at least one radial direction. Preferably, a support is given in both radial directions. The mounting of the spring element on the cage thus agrees with the Ausgestal device according to the aforementioned DE 10 2009 018 965 A1.
Das Kupplungselement, durch welches die Klemmrampen gebildet sind, kann entwe der als Außenring oder als Innenring des Klemmrollenfreilaufs gestaltet sein. Statt ei nes Innenrings kann auch eine massive Welle vorgesehen sein. Sofern sich die Klemmrampen am Außenring befinden, ist der Käfig vorzugsweise unmittelbar durch den Außenring gebildet. The coupling element, by which the clamping ramps are formed, can either be designed as an outer ring or as an inner ring of the clamping roller freewheel. Instead of an inner ring, a solid shaft can also be provided. If the clamping ramps are located on the outer ring, the cage is preferably formed directly by the outer ring.
Der Klemmrollenfreilauf ist unter anderem zur Verwendung in einem Verbrennungs motor, beispielsweise eines Motorrads, geeignet. Ebenso kann der Klemmrollenfrei lauf in einem Drehmomentwandler oder an sonstiger Stelle im Antriebsstrang eines Kraftfahrzeugs, insbesondere in einem Getriebe, verwendet werden. The roller freewheel is suitable, inter alia, for use in an internal combustion engine, for example a motorcycle. Likewise, the free-running pinch roller can be used in a torque converter or elsewhere in the drive train of a motor vehicle, in particular in a transmission.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung nä her erläutert. Hierin zeigen: An exemplary embodiment of the invention is explained below with reference to a drawing. Show here:
Fig. 1 ausschnittsweise einen Klemmrollenfreilauf in einer Schnittdarstellung, 1 shows a detail of a clamping roller freewheel in a sectional view,
Fig. 2 ein Detail der Anordnung nach Figur 1 , Fig. 3 ein Federelement des Klemmrollenfreilaufs in Draufsicht, FIG. 2 shows a detail of the arrangement according to FIG. 1, 3 shows a spring element of the clamping roller freewheel in plan view,
Fig.4 das Federelement in perspektivischer Ansicht. 4 shows the spring element in a perspective view.
Ein insgesamt mit dem Bezugszeichen 1 bezeichneter Klemmrollenfreilauf weist zwei Ringe, nämlich einen nicht dargestellten Innenring und einen Außenring 2, auf. A clamping roller freewheel, designated overall by the reference numeral 1, has two rings, namely an inner ring (not shown) and an outer ring 2.
Klemmrollen 3 kontaktieren einerseits den Innenring und andererseits Klemmrampen 4, welche durch den Außenring 2 gebildet sind. Jeder Klemmrolle 3 ist ein Federele ment 5 zugeordnet, welches an einem Käfig 6 gehalten ist. H ierbei ist jedes Fe derelement 5 an einem Käfigsteg 7 fixiert, wobei die Käfigstege 7 im Ausführungsbei spiel unmittelbar durch Material, welches aus dem Außenring 2 herausgebogen wur de, gebildet sind. Der Käfig 6 ist damit integraler Bestandteil des Außenrings 2. Die Freilaufeinrichtung FR des Innenrings gegenüber dem Außenring 2 ist in Figur 1 durch einen Pfeil kenntlich gemacht. Der Außenring 2 stellt ebenso wie der Innenring ein Kupplungselement des Klemmrollenfreilaufs 1 dar. Pinch rollers 3 contact the inner ring on the one hand and pinch ramps 4, which are formed by the outer ring 2, on the other. Each pinch roller 3 is assigned a Federele element 5 which is held on a cage 6. Here, each spring element 5 is fixed to a cage web 7, the cage webs 7 in the Ausführungsbei play directly through material that was bent out of the outer ring 2 de are formed. The cage 6 is thus an integral part of the outer ring 2. The freewheel device FR of the inner ring opposite the outer ring 2 is indicated in FIG. 1 by an arrow. The outer ring 2, like the inner ring, represents a coupling element of the clamping roller freewheel 1.
Jedes Federelement 5 ist als mehrfach gebogene Blattfeder ausgebildet. Derjenige Abschnitt des Federelementes 5, welcher am Käfigsteg 7 fixiert ist, wird als Flalteab schnitt 8 bezeichnet und weist einen U-förmigen Querschnitt auf. Die Querschnittsge staltung des U-förmigen Flalteabschnitts 8 ist prinzipiell aus der DE 10 2009 018 965 A1 bekannt. Each spring element 5 is designed as a leaf spring bent several times. That portion of the spring element 5 which is fixed on the cage web 7 is referred to as Flalteab section 8 and has a U-shaped cross section. The cross-sectional design of the U-shaped pleat section 8 is known in principle from DE 10 2009 018 965 A1.
Der U-förmige Flalteabschnitt 8 wird auch als erster Endabschnitt des Federelementes 5 bezeichnet. Der zweite, dem Flalteabschnitt 8 gegenüberliegende Endabschnitt 9 kontaktiert die durch das Federelement 5 angefederte Klemmrolle 3. Eine weitere, dem Flalteabschnitt 8 benachbarte Klemmrolle 3 läuft an einen Sicherungsabschnitt 10 an, welcher durch den U-förmigen Flalteabschnitt 8 gebildet ist. FHierbei ragen zwei Sicherungszungen 1 1 , 12 in gerader Verlängerung der mit 13 bezeichneten U-Basis des Flalteabschnitts 8 über den Käfigsteg 7 hinaus. Die Sicherungszungen 1 1 , 12 er strecken sich damit im Wesentlichen in Umfangsrichtung des Klemmrollenfreilaufs 1 , wobei sie die Klemmrolle 3, welche dem Käfigsteg 7 benachbart ist, radial nach außen abstützen. The U-shaped fold section 8 is also referred to as the first end section of the spring element 5. The second end section 9 opposite the pleat section 8 contacts the clamping roller 3, which is spring-loaded by the spring element 5. In this case, two securing tongues 1 1, 12 project in a straight extension of the U-base, designated by 13, of the folded section 8 beyond the cage web 7. The locking tongues 1 1, 12 he thus extend essentially in the circumferential direction of the clamping roller freewheel 1, wherein they support the pinch roller 3, which is adjacent to the cage web 7, radially outward.
Zwischen den beiden Sicherungszungen 1 1 , 12 befindet sich eine ebenfalls dem Hal teabschnitt 8 zuzurechnende Endzunge 14, welche sich von der U-Basis 13 aus radial nach innen erstreckt und somit mit den Sicherungszungen 1 1 , 12 einen zumindest näherungsweise rechten Winkel einschließt. Die Endzunge 14 stellt einen Schenkel des U-Profils des Halteabschnitts 8 dar und liegt am Käfigsteg 7 an. Hierbei weist die Endzunge 14 einen über den Käfigsteg 7 hinausragenden inneren Endabschnitt 15 auf, welcher in Richtung zur Klemmrolle 3 abgeknickt ist und damit eine radial nach innen wirksame Abstützung gegenüber der Klemmrolle 3 bildet. Vom inneren Endab schnitt 15 aus ragt ein Widerhaken 16 in Richtung zum Käfigsteg 7, so dass der U- förmige Halteabschnitt 8 insgesamt formschlüssig am Käfigsteg 7 fixiert ist. Between the two securing tongues 1 1, 12 there is also an end tab 14 which is also attributable to the Hal tea section 8 and which extends radially inward from the U-base 13 and thus encloses an at least approximately right angle with the securing tongues 1 1, 12. The end tongue 14 represents a leg of the U-profile of the holding section 8 and rests on the cage web 7. Here, the end tongue 14 has an inner end section 15 which protrudes beyond the cage web 7 and which is bent in the direction of the pinch roller 3 and thus forms a radially inwardly effective support relative to the pinch roller 3. A barb 16 protrudes from the inner end section 15 in the direction of the cage web 7, so that the U-shaped holding section 8 is fixed on the cage web 7 with a positive fit.
An die U-Basis 13 des Halteabschnitts 8 schließt sich ein Anlageschenkel 17 an, wel cher etwa parallel zur Endzunge 14 angeordnet ist und ebenfalls den Käfigsteg 7 kon taktiert. Der Anlageschenkel 17 erstreckt sich radial nach innen bis zu einer ersten Knickstelle 18 des Federelementes 5. Weitere Knickstellen des Federelementes 5 sind mit 19, 20, 21 , 22, 23 bezeichnet. Die zwischen den Knickstellen 18 bis 23 lie genden Abschnitte des Federelementes 5 werden als Schenkel 25, 26, 27, 28, 29 be zeichnet. An die am weitesten vom Halteabschnitt 8 beabstandete Knickstelle 23 schließt sich der zweite Endabschnitt 9 an, welche auch als Anlageabschnitt bezeich net wird. Der zweite Endabschnitt 9 beschreibt im Unterschied zu den Schenkeln 25 bis 29 eine leicht abgeknickte, der Krümmung der Klemmrolle 3 angepasste Form. Ei ne weite, in Figur 2 erkennbare V-förmige Abwinklung innerhalb des Endabschnitts 9 ist mit 24 bezeichnet. Der zwischen den Endabschnitten 8, 9 liegende Bereich des Federelementes 5 wird als Mittelabschnitt 30 bezeichnet. Sämtliche Schenkel 25 bis 29 sind dem Mittelabschnitt 30 zuzurechnen. To the U-base 13 of the holding portion 8, a contact leg 17 connects, wel cher is arranged approximately parallel to the end tongue 14 and also the cage web 7 con tacted. The contact leg 17 extends radially inward up to a first kink 18 of the spring element 5. Further kinks of the spring element 5 are denoted by 19, 20, 21, 22, 23. The between the kinks 18 to 23 lying lowing sections of the spring element 5 are designated as legs 25, 26, 27, 28, 29 be. The second end section 9, which is also referred to as a contact section, connects to the kink 23, which is furthest away from the holding section 8. In contrast to the legs 25 to 29, the second end section 9 describes a slightly bent shape that is adapted to the curvature of the pinch roller 3. A wide V-shaped bend within the end section 9, which can be seen in FIG. 2, is denoted by 24. The area of the spring element 5 lying between the end sections 8, 9 is referred to as the middle section 30. All legs 25 to 29 are assigned to the middle section 30.
Die in Axialrichtung des Klemmrollenfreilaufs 1 zu messende Breite des Federelemen tes 5 ist mit Bv bezeichnet. Die Breite Bv entspricht der Breite der beiden Endabschnit te 8, 9. Gegenüber dieser Breite Bv ist die mit BR bezeichnete Breite des Mittelab- schnitts 30 auf knapp die Hälfte reduziert. Durch die reduzierte Breite BR wird inner halb des Raumes, in dem das Federelement 5 angeordnet ist, zusätzlicher Raum be reitgestellt, in welchem Schmiermittel aufgenommen werden kann und durch welchen Schmiermittel gefördert werden kann. Auch verbessert der zusätzliche Raum, das heißt Freiraum, welcher seitlich neben dem Mittelanschnitt 30 existiert, im Vergleich zu herkömmlichen, mehrfach abgeknickten Blattfedern mit einheitlicher Breite die Be weglichkeit des Federelementes 5. The width of the Federelemen tes 5 to be measured in the axial direction of the clamping roller freewheel 1 is denoted by Bv. The width Bv corresponds to the width of the two end sections 8, 9. Compared to this width Bv, the width of the center section, designated BR, is cut 30 to almost half. Due to the reduced width BR, additional space is provided within the space in which the spring element 5 is arranged, in which lubricant can be received and through which lubricant can be promoted. The additional space, that is to say free space, which exists laterally next to the central gate 30, also improves the mobility of the spring element 5 in comparison to conventional, multiple-bent leaf springs with a uniform width.
Damit ist in jedem Zustand des Klemmrollenfreilaufs 1 eine gute Schmiermittelversor- gung der mechanisch stark belasteten Kontakte zwischen den Klemmrollen 3, dem Innenring und dem Außenring 2 gegeben. Gegenüber herkömmlichen, beispielsweise aus der DE 10 2009 018 965 A1 bekannten Freilaufkupplungen ist der Aufbau des Klemmrollenfreilaufs 1 , welcher die beschriebenen Federelemente 5 mit mittig redu zierter Breite BR umfasst, nicht grundsätzlich geändert. Durch die im Vergleich zum Mittelabschnitt 30 verbreiterten Endabschnitte 8, 9 ist eine Anfederung der Klemmrol len 3 praktisch über deren gesamte Breite gegeben. Ebenso stützen die Sicherungs zungen 11 , 12 die Klemmrollen 3 praktisch über ihre volle Länge ab. Im Fall des inne ren Endabschnitts 15 ist eine Abstützung der Klemmrolle 3 über mehr als die Hälfte ih rer in Axialrichtung zu messenden Breite gegeben. Thus, in every state of the clamping roller freewheel 1, there is a good supply of lubricant to the mechanically heavily loaded contacts between the clamping rollers 3, the inner ring and the outer ring 2. Compared to conventional freewheel clutches known for example from DE 10 2009 018 965 A1, the structure of the clamping roller freewheel 1, which comprises the spring elements 5 described with a centrally reduced width BR, is not fundamentally changed. Due to the widened end portions 8, 9 compared to the central portion 30, a springing of the Klemmrol len 3 is given practically over its entire width. Likewise, the backup tongues 11, 12 support the pinch rollers 3 practically over their full length. In the case of the inner end portion 15, the clamping roller 3 is supported over more than half of its width to be measured in the axial direction.
Bezuqszeichenliste Reference list
Klemmrollenfreilauf Pinch roller freewheel
Außenring, Kupplungselement Outer ring, coupling element
Klemmrolle Pinch roller
Klemmrampe Clamping ramp
Federelement Spring element
Käfig Cage
Käfigsteg Cage bar
Endabschnitt, Halteabschnitt End section, holding section
Endabschnitt, Anlageabschnitt End section, plant section
Sicherungsabschnitt Fuse section
Sicherungszunge Locking tab
Sicherungszunge Locking tab
U-Basis U base
Endzunge End tongue
Innerer Endabschnitt Inner end section
Widerhaken Barbs
Anlageschenkel Contact leg
Knickstelle Kink
Knickstelle Kink
Knickstelle Kink
Knickstelle Kink
Knickstelle Kink
Knickstelle Kink
V-förmige Abwinklung V-shaped bend
Schenkel leg
Schenkel leg
Schenkel leg
Schenkel leg
Schenkel leg
Mittelabschnitt BR Breite des Mittelabschnitts Bv Breite des Endabschnitts FR Freilaufrichtung Middle section BR width of the middle section Bv width of the end section FR freewheeling direction

Claims

Patentansprüche Claims
1. Klemmrollenfreilauf, mit einer Anzahl Klemmrollen (3), welche jeweils mittels eines Federelementes (5) gegen eine Klemmrampe (4) angefedert sind, welche durch ein Kupplungselement (2) bereitgestellt wird, wobei das Federelement (5) als mehrfach gebogene Blattfeder ausgebildet ist, die mittels eines im Quer schnitt U-förmigen Flalteabschnitts (8) an einem Käfig (6) gehalten ist, dadurch gekennzeichnet, dass das Federelement (5) einen Mittelabschnitt (30) auf weist, welcher schmaler als die beiden Endabschnitte (8, 9), nämlich der U- förmige Flalteabschnitt (8) und ein zur Kontaktierung einer Klemmrolle (3) vor gesehener Anlageabschnitt (9), des Federelementes (5) ist. 1. Clamping roller freewheel, with a number of clamping rollers (3) which are each spring-loaded by means of a spring element (5) against a clamping ramp (4) which is provided by a coupling element (2), the spring element (5) being designed as a leaf spring bent several times which is held on a cage (6) by means of a U-shaped folding section (8), characterized in that the spring element (5) has a central section (30) which is narrower than the two end sections (8, 9), namely the U-shaped fold section (8) and a contact section (9) of the spring element (5) which is seen for contacting a pinch roller (3).
2. Klemmrollenfreilauf nach Anspruch 1 , dadurch gekennzeichnet, dass sich der gegenüber den Endabschnitten (8, 9) verjüngte Mittelabschnitt (30) über mehr als zwei schräg zueinander gestellte Schenkel (25, 26, 27, 28, 29) des Fe derelementes (5) erstreckt. 2. clamping roller freewheel according to claim 1, characterized in that the opposite to the end sections (8, 9) tapered middle section (30) over more than two inclined legs (25, 26, 27, 28, 29) of the Fe derelementes (5 ) extends.
3. Klemmrollenfreilauf nach Anspruch 2, dadurch gekennzeichnet, dass die 3. clamping roller freewheel according to claim 2, characterized in that the
Breite (BR) des Mittelabschnitts (30) nicht mehr als die Hälfte der Breite (Bv) ei nes jeden Endabschnittes (8, 9) beträgt. The width (BR) of the central section (30) is not more than half the width (Bv) of each end section (8, 9).
4. Klemmrollenfreilauf nach Anspruch 3, dadurch gekennzeichnet, dass beide Endabschnitte (8,9) eine übereinstimmende Breite (Bv) aufweisen. 4. Pinch roller freewheel according to claim 3, characterized in that both end sections (8,9) have a matching width (Bv).
5. Klemmrollenfreilauf nach Anspruch 4, dadurch gekennzeichnet, dass der als Flalteabschnitt (8) ausgebildete Endabschnitt über seine gesamte Breite (Bv) eine der durch das Federelement (5) angefederten Klemmrolle (3) benachbarte Klemmrolle (3) in zumindest einer Radialrichtung abstützt. 5. Clamping roller freewheel according to claim 4, characterized in that the end section formed as a pleat section (8) supports over its entire width (Bv) one of the clamping roller (3) spring-loaded by the spring element (5) adjacent clamping roller (3) in at least one radial direction.
6. Klemmrollenfreilauf nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Kupplungselement (2), durch welches die Klemmram pen (4) gebildet sind, als Außenring ausgebildet ist. 6. clamping roller freewheel according to one of claims 1 to 5, characterized in that the coupling element (2) through which the Klemmram pen (4) are formed, is designed as an outer ring.
7. Klemmrollenfreilauf nach Anspruch 6, dadurch gekennzeichnet, dass der Kä fig (6) unmittelbar durch den Außenring (2) gebildet ist. 7. clamping roller freewheel according to claim 6, characterized in that the cage fig (6) is formed directly by the outer ring (2).
PCT/DE2019/101046 2019-02-11 2019-12-05 Clamping roller freewheel WO2020164652A1 (en)

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DE102019103324.1A DE102019103324A1 (en) 2019-02-11 2019-02-11 Pinch roller freewheel
DE102019103324.1 2019-02-11

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DE102021122104B3 (en) 2021-08-26 2022-09-29 Schaeffler Technologies AG & Co. KG Bearing assembly with overrunning function, linear actuator and method of operating a linear actuator
WO2023186337A1 (en) * 2021-09-07 2023-10-05 Aktiebolaget Skf Overrunning pto clutch for tractor manual transmission

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US4088211A (en) * 1977-03-31 1978-05-09 General Motors Corporation Overrunning roller clutch with improved cage and bearing block
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DE19937437A1 (en) 1999-08-07 2001-02-08 Schaeffler Waelzlager Ohg Clamping roller freewheeling device, with cage which can turn in casing in both circumferential directions about its axis
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021122104B3 (en) 2021-08-26 2022-09-29 Schaeffler Technologies AG & Co. KG Bearing assembly with overrunning function, linear actuator and method of operating a linear actuator
WO2023025342A1 (en) 2021-08-26 2023-03-02 Schaeffler Technologies AG & Co. KG Bearing arrangement with freewheel function, linear actuator and method for operating a linear actuator
WO2023186337A1 (en) * 2021-09-07 2023-10-05 Aktiebolaget Skf Overrunning pto clutch for tractor manual transmission

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