DE102011085119B3 - Spur gear differential for use between driven wheels of lorry, has spring unit and axial bearing arranged between sun wheels and resting against sun wheels while friction disks are arranged between each sun wheel and planetary wheel carrier - Google Patents

Spur gear differential for use between driven wheels of lorry, has spring unit and axial bearing arranged between sun wheels and resting against sun wheels while friction disks are arranged between each sun wheel and planetary wheel carrier Download PDF

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DE102011085119B3
DE102011085119B3 DE102011085119A DE102011085119A DE102011085119B3 DE 102011085119 B3 DE102011085119 B3 DE 102011085119B3 DE 102011085119 A DE102011085119 A DE 102011085119A DE 102011085119 A DE102011085119 A DE 102011085119A DE 102011085119 B3 DE102011085119 B3 DE 102011085119B3
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sun
wheels
wheel
differential
planet carrier
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Harald Martini
Thorsten BIERMANN
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Schaeffler Technologies AG and Co KG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/20Arrangements for suppressing or influencing the differential action, e.g. locking devices
    • F16H48/28Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears
    • F16H48/285Arrangements for suppressing or influencing the differential action, e.g. locking devices using self-locking gears or self-braking gears with self-braking intermeshing gears having parallel axes and having worms or helical teeth
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/20Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
    • A61B5/202Assessing bladder functions, e.g. incontinence assessment
    • A61B5/205Determining bladder or urethral pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/686Permanently implanted devices, e.g. pacemakers, other stimulators, biochips
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6874Bladder
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0031Implanted circuitry
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/0004Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse
    • A61F2/0031Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse for constricting the lumen; Support slings for the urethra
    • A61F2/0036Closure means for urethra or rectum, i.e. anti-incontinence devices or support slings against pelvic prolapse for constricting the lumen; Support slings for the urethra implantable
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/06Differential gearings with gears having orbital motion
    • F16H48/10Differential gearings with gears having orbital motion with orbital spur gears
    • F16H2048/106Differential gearings with gears having orbital motion with orbital spur gears characterised by two sun gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/06Differential gearings with gears having orbital motion
    • F16H48/10Differential gearings with gears having orbital motion with orbital spur gears
    • F16H48/11Differential gearings with gears having orbital motion with orbital spur gears having intermeshing planet gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/20Arrangements for suppressing or influencing the differential action, e.g. locking devices
    • F16H48/22Arrangements for suppressing or influencing the differential action, e.g. locking devices using friction clutches or brakes

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Animal Behavior & Ethology (AREA)
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  • Physics & Mathematics (AREA)
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  • General Health & Medical Sciences (AREA)
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  • General Engineering & Computer Science (AREA)
  • Physiology (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

The differential (2) has planetary wheels (6) rotatably held at a planetary wheel carrier (3). Two sun wheels (8, 9) are combed with the planetary wheels and rotatable relative to the wheel carrier. A spring unit (12) i.e. laminated disk spring (13), pretensions the sun wheels relative to the wheel carrier. The spring unit is loaded against the sun wheels and against an axial bearing (14) i.e. needle bearing. The spring unit and the bearing are arranged between the sun wheels and rest against the sun wheels while friction disks (16, 17) are arranged between each sun wheel and the carrier.

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein Stirnraddifferential.The invention relates to a spur gear differential.

Hintergrund der ErfindungBackground of the invention

Ein Differential ist ein Ausgleichsgetriebe umfassend ein Planetengetriebe, das vornehmlich in Kraftfahrzeugen zwischen den angetriebenen Rädern zum Einsatz kommt. Da die Räder einer Achse beim Fahren in einer Kurve unterschiedlich lange Wege zurücklegen, wird über ein solches Differential die Möglichkeit gegeben, dass sich die Umfangsgeschwindigkeiten der gekoppelten Räder frei einstellen können, so dass beide Räder die gleiche Kraft übertragen können. Differentiale sind in unterschiedlicher Bauart bekannt, eine besonders zweckmäßige Ausgestaltung ist die eines Stirnraddifferentials, wie es beispielsweise aus DE 10 2007 040 475 A1 bekannt ist, welches Differential sich durch eine extrem schmale, kleine Bauweise auszeichnet. Dieses Stirnraddifferenzial umfasst einen Planetenradträger, drehbar am Planetenradträger gehalterte Planetenräder und zwei relativ zum Planetenradträger drehbare und mit Planetenrädern kämmende Sonnenräder. Die Planetenradträger erfüllt die Funktion eines Differenzialkorbs klassischer Differenziale. Die Planetenräder sind Ausgleichsräder und die Sonnenräder als Zentralräder sind mit den Abtriebsrädern klassischer Kegelraddifferenziale gleichzusetzen.A differential is a differential comprising a planetary gear that is primarily used in motor vehicles between the driven wheels. Since the wheels of an axle when driving in a curve cover different lengths paths, such a differential is given the possibility that the peripheral speeds of the coupled wheels can adjust freely, so that both wheels can transmit the same power. Differentials are known in different design, a particularly useful embodiment is that of a Stirnraddifferentials, as it for example DE 10 2007 040 475 A1 It is known which differential is characterized by an extremely narrow, small design. This spur gear differential comprises a planet carrier, planet gears rotatably supported on the planet carrier, and two sun gears rotatable relative to the planet carrier and meshing with planetary gears. The planet carrier fulfills the function of a differential cage of classic differentials. The planetary gears are differential gears and the sun gears as central gears are to be equated with the output wheels of classic bevel gear differentials.

Wenngleich derartige Differentiale es ermöglichen, dass sich die Raddrehzahlen unabhängig voneinander entsprechend der Weglängen der jeweiligen Fahrspur einstellen können und auch eine symmetrische Antriebsmomentverteilung auf beide Antriebsräder möglich ist, so ist ein Nachteil insbesondere bei Anwendung im Kraftfahrzeugbereich dahingehend gegeben, als dann, wenn die Kraftschlusspotentiale der beiden Antriebsräder unterschiedlich sind, die Vortriebskräfte, die von beiden Antriebsrädern jeweils auf die Fahrbahn übertragbar sind, jeweils von dem Antriebsrad abhängig sind, dass das geringere Moment erhält, mithin also die geringere Kraft überträgt. D. h., dass in bestimmten Situationen, beispielsweise wenn auf Glatteis eines der Räder durchdreht, das andere, auf einem griffigen Untergrund stehende Rad ein kaum höheres Moment erhält als das durchdrehende. Ein Anfahren kann dann beispielsweise schwierig oder unmöglich sein.Although such differentials make it possible that the wheel speeds can be set independently of each other according to the path lengths of the respective lane and a symmetrical drive torque distribution to both drive wheels is possible, so a disadvantage in particular when used in the motor vehicle sector is given to than when the traction potentials Both drive wheels are different, the propulsive forces that are transferable from both drive wheels on the road, each dependent on the drive wheel that receives the lower torque, thus therefore transmits the lower power. This means that in certain situations, for example when one of the wheels is spinning on ice, the other wheel standing on a grippy ground receives a barely higher moment than the spinning one. A start can then be difficult or impossible, for example.

Zu diesem Zweck ist die Ausgestaltung eines Differentials als Sperrdifferential bekannt. Unter einem Sperrdifferential versteht man ein Differentialgetriebe, das eine konstruktiv bewusst schwergängige, behinderte Ausgleichsbewegung zulässt. D. h., dass eine gewisse Grundkopplung zwischen den beiden Radseiten auch dann gegeben ist, wenn das eine Rad oder die eine Achse infolge schlechter Bodenhaftung kein Moment oder nur ein geringes Moment überträgt. Infolge der gegebenen, auf ein gewisses Niveau gesperrten Kopplung ist es in solchen Fällen möglich, dass das Differential das Antriebsmoment von einem durchrutschenden Rad auf das Rad mit der besseren Bodenhaftung überträgt und so die Traktion verbessert wird. Auch beim Anfahren mit starker Beschleunigung, z. B. auf einer bevorrechtigten Straße, wird hierüber verhindert, dass das kurveninnere Rad abhebt und so durchdreht, so dass die Leistung auf die Straße geleitet und das Fahrzeug sicher in den Verkehr eingefädelt werden kann, beispielsweise im Bereich von Einmündungen. Auch läuft grundsätzlich eine gesperrte Achse immer besser gerade aus als eine ungesperrte, weshalb sich unter Verwendung eines solchen Sperrdifferentials die Wirkung beispielsweise von Seitenwind oder der Bernoulli-Effekt beim schnellen Vorbeifahren an einem LKW reduzieren lässt.For this purpose, the embodiment of a differential is known as a limited slip differential. A limited-slip differential is understood to mean a differential gear that allows a constructively deliberately stiff, disabled compensating movement. That is to say that a certain basic coupling between the two wheel sides is also given if the one wheel or the one axle transmits no moment or only a slight moment as a result of poor ground adhesion. Due to the given coupling locked to a certain level, it is possible in such cases that the differential transmits the drive torque from a slipping wheel to the wheel with better traction and thus improves the traction. Even when starting with strong acceleration, z. As on a privileged road, this prevents the inside wheel lifts and so crazy, so that the power can be directed to the road and the vehicle can be safely threaded into the traffic, for example in the area of junctions. In principle, a locked axle is always better straight than an unlocked, so using such a locking differential can reduce the effect of, for example, crosswinds or the Bernoulli effect when driving fast on a truck.

Auch bei hohen Querbeschleunigungen, beispielsweise bei sportlich gefahrenen Kurven, zeigen sich ebenfalls die Vorteile des Sperrdifferentials. Denn mit ihm kann verhindert werden, dass das kurveninnere und damit entlastete Rad schlupft und ebenso schnell oder sogar schneller als das kurvenäußere Rad dreht, so dass stets ein Leistungsfluss auf die Straße gegeben ist. Zwar ist infolge der auf einen gewissen definierten Wert eingestellten Grundsperrung des Differentials die freie Anpassung der Raddrehzahlen an die Weglänge der Fahrspur behindert, jedoch sind die Vorteile solcher Sperrdifferentiale in kritischen Fahrzuständen beachtlich.Even with high lateral accelerations, for example in sporty driven curves, also show the benefits of the limited slip differential. Because it can be prevented that the inside wheel and thus relieved wheel slips and turns just as fast or even faster than the outside wheel, so that there is always a power flow on the road. Although the free adjustment of the wheel speeds to the path length of the lane is hindered as a result of the set to a certain defined value basic locking of the differential, but the benefits of such limited slip differentials in critical driving conditions are considerable.

Um eine solche drehmomentunabhängige Grundsperrung zu erzielen ist es bekannt, mehrere Reibscheiben zu integrieren, die die freie Beweglichkeit der Abtriebe, also der Sonnenräder, behindern. In das anfangs schon erwähnte Stirnraddifferenzial nach DE 10 2007 040 475 A1 ist deshalb eine Reibscheibe axial zwischen den Sonnenrädern angeordnet. Außerdem ist zwischen dem jeweiligen Sonnenrad und dem Planetenträger angeordnet.In order to achieve such a torque-independent basic blockage, it is known to integrate a plurality of friction plates, which hinder the free mobility of the outputs, so the sun gears. In the initially mentioned spur gear differential DE 10 2007 040 475 A1 Therefore, a friction disc is arranged axially between the sun gears. In addition, it is arranged between the respective sun gear and the planet carrier.

Ein Kegelraddifferenzial mit Sperrwirkung ist aus DE 38 36 552A1 bekannt, das aus einem als Planetenträger bezeichneten Differenzialkorb, in diesem Differenzialkorb drehbar gelagerten und als Planetenräder bezeichneten Ausgleichsrädern und mit diesen kämmenden Zentralrädern gebildet ist. Eine Reibscheiben aufweisende Kupplung ist zwischen dem Planetenträger und dem Zentralrad angeordnet, Darüber hinaus ist ein Federmittel einerseits über die Kupplung gegen eins der Zentralräder und andererseits gegen ein Axiallager angefedert.A bevel gear differential with locking effect is off DE 38 36 552A1 known, which is formed of a designated as a planet carrier differential cage, rotatably mounted in this differential cage and referred to as planet gears differential gears and with these meshing central wheels. A friction discs having clutch is disposed between the planet carrier and the central wheel, In addition, a spring means is spring-loaded on the one hand via the clutch against one of the central wheels and on the other hand against a thrust bearing.

Ein weiteres Differential ist beispielsweise aus WO 02/065000 A2 bekannt. Dort kommen zwei Reibscheiben zum Einsatz, die zwischen den beiden Sonnenrädern angeordnet sind, die Sonnenräder liegen stirnseitig an den Reibscheibenflächen an. Die beiden Reibscheiben sind über dazwischengeschaltete Tellerfederpakete gegen die Sonnenräder verspannt, es ist also eine Vorspannung gegeben. Durch die Wahl der Reibscheiben wie auch insbesondere der Auslegung der Tellefederpakete kann der Grundsperrwert eingestellt werden.Another differential is for example off WO 02/065000 A2 known. There are two friction plates used, between the two Sun gears are arranged, the sun gears are frontally on the Reibscheibenflächen. The two friction discs are braced against the sun gears via interposed disc spring packets, so it is given a bias. By choosing the friction plates as well as in particular the interpretation of Tellefederpakete the basic locking value can be adjusted.

Bei dem aus WO 02/065000 A2 bekannten Differential sind stets zwei Reibscheiben zu verwenden, zwischen denen die Tellerfederpakete angeordnet sind. Über die über die Reibscheiben gegebene „Kapselung” der Tellerfedern wird ein Verschleiß derselben verhindert, da sie nicht in reibenden Kontakt zu einem der Sonnenräder stehen. Ferner ist der Durchmesser der verwendbaren Reibscheiben bei dem Differential aus WO 02/065000 A2 letztlich vom Durchmesser der Tellerfedern abhängig, da diese ja zwangsläufig in Wirkungsverbindung mit den Reibscheiben zu bringen sind, wobei das Tellerfeder-Reibscheiben-Paket zusätzlich in einer Radialhülse, die zwischen den Sonnenrädern angeordnet ist, aufgenommen ist. Eine übermäßig große Reibfläche, über die der Sperrwert variiert werden könnte, steht dort nicht zur Verfügung.At the WO 02/065000 A2 known differential are always two friction plates to use, between which the plate spring assemblies are arranged. About the given via the friction plates "encapsulation" of the plate springs wear the same is prevented because they are not in frictional contact with one of the sun gears. Further, the diameter of the friction plates usable in the differential is WO 02/065000 A2 ultimately depending on the diameter of the disc springs, as they are so inevitably bring into operative connection with the friction plates, wherein the disc spring friction disc package is additionally received in a radial sleeve which is disposed between the sun gears. An excessively large friction surface, over which the blocking value could be varied, is not available there.

Zusammenfassung der ErfindungSummary of the invention

Der Erfindung liegt somit das Problem zugrunde, ein Differential, insbesondere in Form eines Stirnraddifferentials, mit Sperrwirkung anzugeben, das demgegenüber verbessert ist.The invention is therefore based on the problem of specifying a differential, in particular in the form of a spur gear, with blocking effect, which is improved in contrast.

Zur Lösung dieses Problems sind erfindungsgemäß das Federmittel und das Axiallager zwischen den beiden Sonnenrädern angeordnet, wobei das Federmittel am einen Sonnenrad und das Axiallager am anderen Sonnenrad anliegt, während zwischen jedem Sonnenrad und dem Planetenradträger jeweils eine Reibscheibe angeordnet ist. Es kommen also zwei Reibscheiben zum Einsatz, die jeweils die Relativbewegung eines Sonnenrads zum Planetenradträger beeinflussen. Das Federmittel nebst Axiallager befindet sich zwischen den Sonnenrädern, spannt diese also in Richtung der Planetenradträger vor, mithin also gegen die Reibscheiben. Da über das Axiallager eine freie Verdrehbarkeit der Sonnenräder zueinander sichergestellt ist, wird folglich das Federmittel nicht reibend beansprucht.To solve this problem, the spring means and the thrust bearing between the two sun gears are arranged according to the invention, wherein the spring means abuts a sun gear and the thrust bearing on the other sun gear, while between each sun gear and the planet carrier in each case a friction disc is arranged. So there are two friction plates used, each affecting the relative movement of a sun gear to the planet. The spring means together with thrust bearing is located between the sun gears, so this biases in the direction of the planet carrier, thus against the friction plates. Since a free rotatability of the sun gears to each other is ensured via the thrust bearing, consequently, the spring means is not subjected to rubbing.

Bei dem erfindungsgemäßen Differential, insbesondere in einer Bauform, wie sie aus DE 10 2007 040 475 A1 bekannt ist, ist das Federmittel, das die Sonnenräder relativ zum Planetenradträger vorspannt und bevorzugt als Tellerfeder oder Tellerfederpaket ausgeführt ist, nicht unmittelbar mit einer Reibscheibe gekoppelt, sondern einem Sonnenrad aufgelagert. Die andere Seite des Federmittels ist an einem Axiallager aufgelagert, das seinerseits an dem anderen Sonnenrad abgestützt ist.In the differential according to the invention, in particular in a design, as it DE 10 2007 040 475 A1 is known, the spring means, which biases the sun gears relative to the planet carrier and is preferably designed as a plate spring or plate spring assembly, not directly coupled to a friction disc, but a sun gear superimposed. The other side of the spring means is supported on a thrust bearing, which in turn is supported on the other sun gear.

Darüber hinaus ist infolge der Entkopplung von Federmittel und Reibscheibe zwangsläufig keine auslegungsmäßige Abhängigkeit des Reibscheibendurchmessers gegeben. Dieser kann unter Ausnutzung des gesamten gegebenen radialen Bauraums den Anforderungen entsprechend gewählt werden.In addition, due to the decoupling of spring means and friction disc inevitably no interpretive dependence of the friction disc diameter is given. This can be selected by taking advantage of the total given radial space requirements.

Als Federmittel kommt bevorzugt wenigstens eine Tellerfeder, bevorzugt ein Tellerfederpaket bestehend aus mehreren hintereinander geschalteten Tellerfedern zum Einsatz, wobei insbesondere bei Verwendung eines Tellerfederpakets eine große Bandbreite hinsichtlich der Variation der Vorspannkraft gegeben ist.As a spring means is preferably at least one plate spring, preferably a disc spring assembly consisting of several successively connected disc springs are used, in particular when using a plate spring package is given a wide range in terms of the variation of the biasing force.

Das Axiallager selbst ist bevorzugt ein Nadellager, das axial gesehen sehr wenig aufbaut, so dass folglich hierfür wenig Bauraum vorgehalten werden muss.The thrust bearing itself is preferably a needle bearing, which, viewed axially, builds up very little, so that consequently little space must be kept for this purpose.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

1 zeigt in einer Schnittansicht ein Ausführungsbeispiel eines erfindungsgemäßen Differentials 1 in einer Bauform als Stirnraddifferential 2 mit Sperrfunktion. Es besteht aus einem Planetenradträger 3, der im gezeigten Ausführungsbeispiel aus zwei dünnwandigen Blechbauteilen 4, 5, die über geeignete Verbindungen, z. B. Nieten, gehäuseartig miteinander verbunden sind. Der Planetenradträger 3 trägt mehrere Planetenräder 6, die auf entsprechenden Lagerbolzen 7 drehbar am Planetenradträger 3 gehaltert sind. 1 shows in a sectional view an embodiment of a differential according to the invention 1 in a design as a spur gear differential 2 with blocking function. It consists of a planet carrier 3 in the illustrated embodiment of two thin-walled sheet metal components 4 . 5 which are accessible via suitable compounds, e.g. B. rivets, are connected to each other like a box. The planet carrier 3 carries several planet wheels 6 on corresponding bearing pins 7 rotatable on the planet carrier 3 are held.

Die einzelnen Planeten kämmen in an sich bekannter Bauweise mit jeweils einem Sonnenrad 8, 9, wobei jedes Sonnenrad 8, 9 mit einem eigenen Planetenradsatz kämmt. Die Sonnenräder 8, 9 sind über entsprechende Gleithülsen 10, 11 im Planetenradträger 3 drehgelagert.The individual planets mesh in per se known construction, each with a sun gear 8th . 9 where each sun wheel 8th . 9 meshes with its own planetary gear set. The sun wheels 8th . 9 are via corresponding sliding sleeves 10 . 11 in the planet carrier 3 rotatably mounted.

Zwischen den Sonnenrädern, die in geeigneter Weise mit nicht näher gezeigten Abtriebswellen zu verbinden sind, die dann zu anzutreibenden Rädern oder dergleichen laufen, befindet sich ein Federmittel 12 hier in Form eines Tellerfederpakets 13, das an einer Seite im gezeigten Ausführungsbeispiel am Sonnenrad 9 abgestützt ist. An der anderen Seite ist das Tellerfederpaket gegen ein Axiallager 14 hier in Form eines Nadellagers 15, das am anderen Sonnenrad 8 abgestützt ist, aufgelagert. Über die Integration des Axiallagers 14 ist eine freie Verdrehbarkeit der Sonnenräder 8, 9 relativ zueinander möglich, ohne dass das Tellerfederpaket in irgendeiner Form reibend beaufschlagt wird. Über das Tellerfederpaket 13 wiederum werden die beiden Sonnenräder 8, 9 gegen den Planetenradträger 3 vorgespannt. Federmittel 12 und Axiallager 14 können natürlich auch vertauscht angeordnet werden.Between the sun gears, which are to be connected in a suitable manner with output shafts not shown in detail, which then run to be driven wheels or the like, there is a spring means 12 here in the form of a plate spring package 13 , on one side in the embodiment shown on the sun gear 9 is supported. On the other side is the cup spring pack against a thrust bearing 14 here in the form of a needle bearing 15 on the other sun wheel 8th supported, superimposed. About the integration of the thrust bearing 14 is a free twistability of the sun gears 8th . 9 relative to each other possible without the disc spring assembly is rubbed in any form. About the plate spring package 13 turn the two sun gears 8th . 9 against the planet carrier 3 biased. spring means 12 and thrust bearings 14 Of course, they can also be arranged reversed.

Zwischen jedem Sonnenrad 8, 9 und dem benachbarten Planetenradträger 3 ist jeweils eine Reibscheibe 16, 17 aus einem geeigneten Reibmaterial angeordnet. Die beiden Sonnenräder 8, 9 werden über das Tellerfederpaket 13 in Richtung des Planetenradträgers 3 vorgespannt, damit also auch gegen die beiden Reibscheiben 16, 17. Über die Reibscheiben wird eine Relativbewegung zwischen jedem Sonnenrad 8, 9 und den Planetenradträger 3 behindert, eine freie Drehbarkeit ist damit ausgeschlossen. Hierüber wird also ein drehmomentunabhängiger Grundsperrwert erzeugt, der einerseits von der Vorspannkraft, andererseits von den jeweiligen Reibflächen der Reibscheiben 16, 17 abhängt.Between every sun wheel 8th . 9 and the adjacent planet carrier 3 each is a friction disc 16 . 17 arranged from a suitable friction material. The two sun wheels 8th . 9 be over the plate spring package 13 in the direction of the planet carrier 3 preloaded, so that also against the two friction discs 16 . 17 , About the friction discs is a relative movement between each sun gear 8th . 9 and the planet carrier 3 impeded, a free rotation is excluded. This is how a torque-independent basic locking value is generated, on the one hand by the biasing force, on the other hand by the respective friction surfaces of the friction plates 16 . 17 depends.

Das Tellerfederpaket 13 ist ersichtlich nicht mit den Reibscheiben 16, 17 in irgendeiner Form verbunden, d. h., dass sowohl das Tellerfederpaket 13 als auch die Reibscheiben 16, 17 unabhängig voneinander im Durchmesser gewählt werden können. Je nach Anforderung und vorhandenem Bauraum können also auch vom Durchmesser her relativ große Reibscheiben verwendet werden, so dass sich große Reibflächen geben und mithin auch hierüber eine beachtliche Variationsmöglichkeit hinsichtlich des Grundsperrwerts gegeben ist.The plate spring package 13 is not visible with the friction discs 16 . 17 connected in any form, that is, both the plate spring package 13 as well as the friction discs 16 . 17 can be selected independently of each other in diameter. Depending on the requirements and existing space so relatively large friction plates can be used so that there are large friction surfaces and thus also given here a considerable variation in terms of basic locking value.

Wie 1 ferner zeigt, ist der Planetenradträger 3 mit einem Antriebsstirnrad 18 über geeignete Verbindungsschrauben 19 verbunden, so dass ein unmittelbarer Antrieb des Planetenradträgers 3 über das Antriebsrad 18, beispielsweise ein schräg verzahntes Stirnrad, erfolgen kann. Da aus der Schrägverzahnung axiale, drehmomentabhängige Kräfte resultieren, können die Reibscheiben 16, 17 zusätzlich zur Vorspannkraft über das Tellerfederpaket 13 auch mit diesen axialen Kräften belastet werden, so dass eine Steigerung des Sperrwerts zusätzlich möglich ist. Die Vorspannung, die über das Tellerfederpaket 13 eingebracht wird, liegt im Bereich mehrerer 10 kN.As 1 also shows, is the planet carrier 3 with a drive spur gear 18 via suitable connecting screws 19 connected, so that an immediate drive of the planet carrier 3 over the drive wheel 18 , For example, a helical spur gear, can be done. Since axial, torque-dependent forces result from the helical gearing, the friction discs 16 . 17 in addition to the preload force on the plate spring package 13 be burdened with these axial forces, so that an increase of the blocking value is also possible. The bias, which over the plate spring package 13 is introduced, is in the range of several 10 kN.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Differentialdifferential
22
Stirnraddifferentialspur gear
33
Planetenradträgerplanet
44
Blechbauteilsheet metal component
55
Blechbauteilsheet metal component
66
Planetenradplanet
77
Lagerbolzenbearing bolt
88th
Sonnenradsun
99
Sonnenradsun
1010
Gleithülsesliding sleeve
1111
Gleithülsesliding sleeve
1212
Federmittelspring means
1313
TellerfederpaketBelleville spring assembly
1414
Axiallagerthrust
1515
Nadellagerneedle roller bearings
1616
Reibscheibefriction
1717
Reibscheibefriction
1818
Antriebsstirnraddriving spur
1919
Verbindungsschraubeconnecting screw

Claims (3)

Stirnraddifferential (2), umfassend einen Planetenradträger (3), drehbar am Planetenradträger (3) gehalterte Planetenträder (6) und zwei relativ zum Planetenradträger (3) drehbare und mit Planeteträdern (6) kämmende Sonnenräder (8, 9), wenigstens eine Reibscheibe (16, 17) sowie wenigstens ein die Sonnenräder (8, 9) relativ zum Planetenradträger (3) vorspannendes Federmittel (12), wobei das Federmittel (12) einerseits gegen ein Sonnenrad (8, 9) und andererseits gegen ein Axiallager (14) angefedert ist, und wobei das Federmittel (12) und das Axiallager (14) zwischen den beiden Sonnenrädern (8, 9) angeordnet sind, wobei das Federmittel (12) am einen Sonnenrad (8, 9) und das Axiallager (14) am anderen Sonnenrad (8, 9) anliegt, während zwischen jedem Sonnenrad (8, 9) und dem Planetenradträger (3) jeweils eine Reibscheibe (16, 17) angeordnet ist.Spur gear differential ( 2 ) comprising a planet carrier ( 3 ), rotatable on the planet carrier ( 3 ) supported planetary wheels ( 6 ) and two relative to the planet carrier ( 3 ) rotatable and with planetary gears ( 6 ) meshing sun gears ( 8th . 9 ), at least one friction disc ( 16 . 17 ) and at least one of the sun gears ( 8th . 9 ) relative to the planet carrier ( 3 ) biasing spring means ( 12 ), wherein the spring means ( 12 ) on the one hand against a sun gear ( 8th . 9 ) and on the other hand against a thrust bearing ( 14 ) is spring-loaded, and wherein the spring means ( 12 ) and the thrust bearing ( 14 ) between the two sun gears ( 8th . 9 ) are arranged, wherein the spring means ( 12 ) on a sun wheel ( 8th . 9 ) and the thrust bearing ( 14 ) on the other sun wheel ( 8th . 9 ), while between each sun gear ( 8th . 9 ) and the planet carrier ( 3 ) each a friction disc ( 16 . 17 ) is arranged. Stirnradifferenzial nach Anspruch 1, dadurch gekennzeichnet, dass das Federmittel (12) eine Tellerfeder oder ein Tellerfederpaket (13) ist.Stirnradifferenzial according to claim 1, characterized in that the spring means ( 12 ) a plate spring or a plate spring package ( 13 ). Stirnraddifferenzial nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Axiallager (14) ein Nadellager (15) ist.A spur gear differential according to one of the preceding claims, characterized in that the thrust bearing ( 14 ) a needle bearing ( 15 ).
DE102011085119A 2011-10-24 2011-10-24 Spur gear differential for use between driven wheels of lorry, has spring unit and axial bearing arranged between sun wheels and resting against sun wheels while friction disks are arranged between each sun wheel and planetary wheel carrier Active DE102011085119B3 (en)

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DE102019116595A1 (en) * 2019-06-19 2020-12-24 Schaeffler Technologies AG & Co. KG Differential with increased locking effect
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DE102021126052A1 (en) 2021-10-07 2023-04-13 Bayerische Motoren Werke Aktiengesellschaft Spur gear differential for a motor vehicle and drive train for a motor vehicle
DE102022100802A1 (en) 2022-01-14 2023-07-20 Schaeffler Technologies AG & Co. KG Differential gear with torque-sensing friction device
DE102022201144A1 (en) 2022-02-03 2023-08-03 Zf Friedrichshafen Ag Differential gear with self-locking function in traction and overrun operation for a vehicle and drive train with such a gear
DE102022201144B4 (en) 2022-02-03 2023-10-12 Zf Friedrichshafen Ag Differential gear with self-locking function in pulling and pushing mode for a vehicle and drive train with such a gear
US11846346B2 (en) 2022-02-03 2023-12-19 Zf Friedrichshafen Ag Gear unit for a vehicle and powertrain with such a gear unit
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DE102022202378A1 (en) 2022-03-10 2023-09-14 Zf Friedrichshafen Ag Transmission for a vehicle and drive train with such a transmission
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DE102022121972A1 (en) 2022-08-31 2024-02-29 Bayerische Motoren Werke Aktiengesellschaft Transfer case for a motor vehicle and motor vehicle

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