EP2428674B1 - Freewheel device in a start device for combustion engines - Google Patents

Freewheel device in a start device for combustion engines Download PDF

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Publication number
EP2428674B1
EP2428674B1 EP11178038.3A EP11178038A EP2428674B1 EP 2428674 B1 EP2428674 B1 EP 2428674B1 EP 11178038 A EP11178038 A EP 11178038A EP 2428674 B1 EP2428674 B1 EP 2428674B1
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EP
European Patent Office
Prior art keywords
carrier
transmission
overrunning clutch
clutch device
planet
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.)
Not-in-force
Application number
EP11178038.3A
Other languages
German (de)
French (fr)
Other versions
EP2428674A1 (en
Inventor
Stephan Kaske
Michael Stahl
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.)
SEG Automotive Germany GmbH
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SEG Automotive Germany GmbH
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Publication date
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Publication of EP2428674A1 publication Critical patent/EP2428674A1/en
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Publication of EP2428674B1 publication Critical patent/EP2428674B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/062—Starter drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/025—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/026—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the centrifugal type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type

Definitions

  • the invention relates to a freewheel device in a starting device for internal combustion engines according to the preamble of claim 1.
  • a freewheel device for starting devices, which is designed as a stationary freewheel and is not axially displaced during the freewheel function.
  • the freewheel device is arranged between an armature shaft and an output shaft, which is the carrier of a single-pinion, which is brought into engagement with a ring gear of the internal combustion engine to start the internal combustion engine.
  • the movement transmission between the armature shaft and the output shaft takes place via a planetary gear, which comprises a sun gear which is fixedly connected to the armature shaft and which meshes with planet gears which are mounted on a planet carrier, which is part of a driver of the freewheel device.
  • Another section of the driver is connected to a hub of the output shaft via clamping rollers, the clamping rollers for transmitting the rotary movement between the armature and the output shaft being received in wedge-shaped receiving pockets of a driver section and being pushed out of the receiving pockets for the freewheeling function.
  • the planet gears are supported on the driver via axle bolts that are received in the driver through bores.
  • the axle bolts are pressed into the holes, which requires an exact shape of the hole and a narrow diameter tolerance.
  • the driver must have sufficient strength to accommodate the axle bolts or the forces and moments that occur during operation.
  • the US 2004/180746 A1 discloses a starting device for an internal combustion engine, which is provided with a freewheel device which has a drive plate and a planetary gear with a gear carrier which is the carrier of planet gears.
  • the gear carrier is supported on the drive plate by means of a spring device with a friction plate and a spring element. This is intended to alleviate axial impulses emanating from the drive plate during a recoil.
  • the invention is based on the object of stably designing a freewheel device in a starting device using simple structural measures.
  • the freewheel device according to the invention is used in starting devices for internal combustion engines, via which the internal combustion engine is started in a vehicle.
  • the starting device has an electric drive motor which drives an armature shaft which is connected via a gearbox to an output shaft on which a starter pinion is seated.
  • the starter pinion is brought into engagement with a ring gear on the internal combustion engine for starting.
  • a section of the driver forms a gear carrier of the gear between the armature shaft and the output shaft.
  • a driver disk connected to the output shaft and the gear carrier, which are both part of the driver form separate components that are coupled to transmit torque.
  • the driver thus comprises at least two separate, independently formed components, which are connected to one another in a suitable manner in order to transmit the rotary movement emanating from the armature shaft to the output shaft via the transmission and the two components of the driver lying directly axially against one another .
  • the design as components that are designed independently of one another has the advantage that each component, i.e. both the gear carrier and the drive plate, can be adapted to the respective application in the best possible way, both with regard to the design and the choice of material.
  • the torque-transmitting coupling ensures that the rotary motion is transmitted to the output shaft and the starter pinion.
  • the gear carrier and the drive plate are made of different materials, on the one hand to meet the requirements for sufficient strength and, on the other hand, an inexpensive one To enable production and possibly also assembly.
  • the strength of each component can be adapted to the respective requirement.
  • the gear carrier can consist of a less high-strength material, for which sintered material, plastic or possibly also metal is suitable.
  • driver disk can be used for both right-handed and left-handed freewheels without changing the geometry.
  • the direction of the freewheel can be reversed if the mounting position is reversed by 180 °.
  • the gear carrier and the drive plate are connected to one another in a rotationally fixed manner. Basically, however, a coupling between these components with play or a torsion spring option is sufficient to transmit the torque that is required for driving the starter pinion.
  • the connection between the gearbox carrier and drive plate is made, for example, by pressing or toothing.
  • the gear is designed as a planetary gear, which comprises a sun gear, which is non-rotatably connected to the armature shaft, and planet gears on a planet carrier, the planet gears meshing with the sun gear.
  • the planet carrier is formed by the gear carrier of the driver.
  • the planet gears are received in bores in the planet carrier via axle bolts.
  • the bores can completely penetrate the planet carrier, the planet carrier preferably having a sufficient thickness, on the one hand, for secure storage to ensure the planet gears via the axle bolts and on the other hand to ensure sufficient strength to absorb the forces and moments that arise.
  • the axle bolts can be pressed into the holes, which requires a close diameter tolerance for a secure connection of the axle bolts and planet carrier.
  • the planet carrier is made of plastic, sintered steel or a suitable metal, the axle bolts can be pressed into the bores without the risk of the planet carrier being distorted.
  • the design as a through hole also allows easier insertion of the axle bolts.
  • FIG. 1 A starting device 1 for starting an internal combustion engine is shown.
  • the starting device 1 comprises an armature shaft 3, which is driven by an electric motor, not shown, and an output shaft 4, which is the carrier of a starter pinion 5, which is adjustable between an axially retracted position and an axially advanced position, in which the starter pinion has a ring gear an internal combustion engine is engaged.
  • a freewheel device 2 is located between the armature shaft 3 and the output shaft 4, which ensures that only motion is transmitted from the starting device 1 to the starting ring of the internal combustion engine, but not in the opposite direction. This ensures that when the internal combustion engine starts and accelerates to a higher speed than the starter pinion, an impermissibly high acceleration from the starter ring to the starter pinion is prevented.
  • the freewheel device 2 is connected to the armature shaft 3 via a planetary gear 6.
  • the planetary gear 6 comprises a sun gear 7, which is seated on the armature shaft 3 in a rotationally fixed manner, and a plurality of planet gears 8 on the driver side, which are mounted on axle pins 9 on a planet carrier 11 of the driver 10 and are in engagement with the sun gear 7.
  • the driver 10 also includes a driver disk 12, via which the movement or torque is transmitted to the output shaft 4.
  • the drive plate 12 how Fig. 1 combined with Fig. 2 to see a wedge-shaped receiving pocket for receiving a roller or roller 14, which rests on the outer surface of a hub 15, which is made in one piece with the output shaft 4.
  • the roller or roller 14 is pressed via a spring element 16 into the wedge-shaped receiving pocket in the drive plate 12.
  • the driver 10 is set in rotary motion via the armature shaft 3 and the planetary gear 6, which is transmitted to the hub 15 for driving the output shaft 4 via the rollers 14, of which several are present in receiving pockets distributed over the circumference.
  • the rollers 14 are moved out of the receiving pockets, as a result of which the power transmission path is interrupted.
  • the planet carrier 11 and the drive plate 12 of the driver 10 are designed as two separate components that lie directly against each other on the end face. Planet carrier 11 and drive plate 12 are in particular coupled to one another in a rotationally fixed manner, for example by pressing or toothing.
  • the drive plate 12 expediently consists of a high-strength material such as sintered steel or other steel.
  • the planet carrier 11, in which the bores for receiving the axle bolts 9 are made on the other hand, consists of a softer material such as e.g. Sintered material, plastic or a metal that allows the axle bolts 9 to be pressed in with a small tolerance.
  • the bores for receiving the axle bolts 9 expediently extend completely through the planet carrier 11 in the axial direction.
  • the driver 10 with the planet carrier 11 and the driver plate 12 is covered by a cover sleeve 13.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Die Erfindung bezieht sich auf eine Freilaufeinrichtung in einer Startvorrichtung für Brennkraftmaschinen nach dem Oberbegriff des Anspruches 1.The invention relates to a freewheel device in a starting device for internal combustion engines according to the preamble of claim 1.

Stand der TechnikState of the art

In der DE 196 16 666 A1 wird eine Freilaufeinrichtung für Startvorrichtungen beschrieben, die als ortsfester Freilauf ausgebildet ist und während der Freilauffunktion nicht axial verschoben wird. Die Freilaufeinrichtung ist zwischen einer Ankerwelle und einer Abtriebswelle angeordnet, die Träger eines Einspurritzels ist, das zum Starten der Brennkraftmaschine in Eingriff mit einem Zahnkranz der Brennkraftmaschine gebracht wird. Die Bewegungsübertragung zwischen der Ankerwelle und der Abtriebswelle erfolgt über ein Planetengetriebe, das ein fest mit der Ankerwelle verbundenes Sonnenrad umfasst, welches mit Planetenrädern kämmt, die auf einem Planetenträger gelagert sind, welcher Bestandteil eines Mitnehmers der Freilaufeinrichtung ist. Ein weiterer Abschnitt des Mitnehmers ist über Klemmwalzen mit einer Nabe der Abtriebswelle verbunden, wobei die Klemmwalzen zur Übertragung der Drehbewegung zwischen Anker- und Abtriebswelle in keilförmig gestalteten Aufnahmetaschen eines Mitnehmerabschnitts aufgenommen und für die Freilauffunktion aus den Aufnahmetaschen herausgeschoben sind.In the DE 196 16 666 A1 describes a freewheel device for starting devices, which is designed as a stationary freewheel and is not axially displaced during the freewheel function. The freewheel device is arranged between an armature shaft and an output shaft, which is the carrier of a single-pinion, which is brought into engagement with a ring gear of the internal combustion engine to start the internal combustion engine. The movement transmission between the armature shaft and the output shaft takes place via a planetary gear, which comprises a sun gear which is fixedly connected to the armature shaft and which meshes with planet gears which are mounted on a planet carrier, which is part of a driver of the freewheel device. Another section of the driver is connected to a hub of the output shaft via clamping rollers, the clamping rollers for transmitting the rotary movement between the armature and the output shaft being received in wedge-shaped receiving pockets of a driver section and being pushed out of the receiving pockets for the freewheeling function.

Die Lagerung der Planetenräder auf dem Mitnehmer erfolgt über Achsbolzen, die über Bohrungen im Mitnehmer aufgenommen sind. Die Achsbolzen werden in die Bohrungen eingepresst, was eine genaue Form der Bohrung und eine enge Durchmessertoleranz erfordert. Der Mitnehmer muss eine ausreichend hohe Festigkeit für die Aufnahme der Achsbolzen bzw. die im Betrieb auftretenden Kräfte und Momente aufweisen.The planet gears are supported on the driver via axle bolts that are received in the driver through bores. The axle bolts are pressed into the holes, which requires an exact shape of the hole and a narrow diameter tolerance. The driver must have sufficient strength to accommodate the axle bolts or the forces and moments that occur during operation.

Die US 2004/180746 A1 offenbart eine Startvorrichtung für eine Brennkraftmaschine, die mit einer Freilaufeinrichtung versehen ist, welche eine Mitnehmerscheibe sowie ein Planetengetriebe mit einem Getriebeträger aufweist, der Träger von Planetenrädern ist. Der Getriebeträger ist über eine Federeinrichtung mit einer Friktionsplatte und einem Federelement an der Mitnehmerscheibe abgestützt. Damit sollen axiale Impulse abgemildert werden, die bei einem Rückstoß von der Mitnehmerscheibe ausgehen.The US 2004/180746 A1 discloses a starting device for an internal combustion engine, which is provided with a freewheel device which has a drive plate and a planetary gear with a gear carrier which is the carrier of planet gears. The gear carrier is supported on the drive plate by means of a spring device with a friction plate and a spring element. This is intended to alleviate axial impulses emanating from the drive plate during a recoil.

Eine weitere Freilaufeinrichtung einer Startvorrichtung ist aus US 5 088 338 A und DE 10/2010/028415 A1 , bzw. EP 2 564 053 A2 , bekannt.Another freewheel device of a starter is out US 5,088,338 A and DE 10/2010/028415 A1 , or. EP 2 564 053 A2 , known.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zu Grunde, eine Freilaufeinrichtung in einer Startvorrichtung mit einfachen konstruktiven Maßnahmen stabil auszubilden.The invention is based on the object of stably designing a freewheel device in a starting device using simple structural measures.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.This object is achieved with the features of claim 1. The subclaims indicate appropriate further training.

Die erfindungsgemäße Freilaufeinrichtung wird in Startvorrichtungen für Brennkraftmaschinen eingesetzt, über die die Brennkraftmaschine in einem Fahrzeug gestartet wird. Die Startvorrichtung weist hierfür einen elektrischen Antriebsmotor auf, der eine Ankerwelle antreibt, welche über ein Getriebe mit einer Abtriebswelle verbunden ist, auf der ein Starterritzel aufsitzt. Das Starterritzel wird zum Starten in Eingriff mit einem Zahnkranz an der Brennkraftmaschine gebracht.The freewheel device according to the invention is used in starting devices for internal combustion engines, via which the internal combustion engine is started in a vehicle. For this purpose, the starting device has an electric drive motor which drives an armature shaft which is connected via a gearbox to an output shaft on which a starter pinion is seated. The starter pinion is brought into engagement with a ring gear on the internal combustion engine for starting.

Ein Abschnitt des Mitnehmers bildet einen Getriebeträger des Getriebes zwischen der Ankerwelle und der Abtriebswelle. Erfindungsgemäß ist vorgesehen, dass eine mit der Abtriebswelle verbundene Mitnehmerscheibe und der Getriebeträger, welche beide Bestandteil des Mitnehmers sind, separate Bauteile bilden, die momentenübertragend gekoppelt sind. Der Mitnehmer umfasst somit zumindest zwei separate, unabhängig voneinander ausgebildete Bauteile, die in einer geeigneten Weise miteinander verbunden sind, um die Drehbewegung, welche von der Ankerwelle ausgeht, über das Getriebe und die beiden unmittelbar axial aneinander liegenden Bauteile des Mitnehmers auf die Abtriebswelle zu übertragen. Die Ausführung als unabhängig voneinander ausgeführte Bauteile hat den Vorteil, dass jedes Bauteil, also sowohl der Getriebeträger als auch die Mitnehmerscheibe, in bestmöglicher Weise an den jeweiligen Einsatzzweck angepasst werden können, und zwar sowohl im Hinblick auf die konstruktive Gestalt als auch die Materialwahl. Über die momentenübertragende Kopplung ist sichergestellt, dass die Drehbewegung auf die Abtriebswelle und das Starterritzel übertragen wird.A section of the driver forms a gear carrier of the gear between the armature shaft and the output shaft. According to the invention, it is provided that a driver disk connected to the output shaft and the gear carrier, which are both part of the driver, form separate components that are coupled to transmit torque. The driver thus comprises at least two separate, independently formed components, which are connected to one another in a suitable manner in order to transmit the rotary movement emanating from the armature shaft to the output shaft via the transmission and the two components of the driver lying directly axially against one another . The design as components that are designed independently of one another has the advantage that each component, i.e. both the gear carrier and the drive plate, can be adapted to the respective application in the best possible way, both with regard to the design and the choice of material. The torque-transmitting coupling ensures that the rotary motion is transmitted to the output shaft and the starter pinion.

Gemäß bevorzugter Ausführung bestehen der Getriebeträger und die Mitnehmerscheibe aus unterschiedlichen Materialien, um zum einen den Erfordernissen nach ausreichender Festigkeit Rechnung zu tragen und zum andern eine kostengünstige Herstellung und ggf. auch Montage zu ermöglichen. Die Festigkeit jedes Bauteils kann, ebenso wie die Geometrie, an das jeweilige Erfordernis angepasst werden. So ist es beispielsweise vorteilhaft, die Mitnehmerscheibe aus einem hochfesten Material zu fertigen, beispielsweise aus einem Sinterstahl oder aus einem Metall, insbesondere einem Stahl, welcher ggf. im Strangpressverfahren bearbeitet werden kann. Dadurch ist gewährleistet, dass die Mitnehmerscheibe, welche sich üblicherweise über Walzen oder Rollen radial an einem Abschnitt der Abtriebswelle abstützt und ein Moment auf die Abtriebswelle überträgt, mit keilförmigen Ausnehmungen bzw. Keilbahnen ausreichender Festigkeit versehen werden kann, in denen die Rollen bzw. Walzen verstellbar aufgenommen sind.According to a preferred embodiment, the gear carrier and the drive plate are made of different materials, on the one hand to meet the requirements for sufficient strength and, on the other hand, an inexpensive one To enable production and possibly also assembly. The strength of each component, like the geometry, can be adapted to the respective requirement. For example, it is advantageous to manufacture the drive plate from a high-strength material, for example from a sintered steel or from a metal, in particular a steel, which can optionally be processed in the extrusion process. This ensures that the drive plate, which is usually supported radially on a section of the output shaft via rollers or rollers and transmits a moment to the output shaft, can be provided with wedge-shaped recesses or keyways of sufficient strength in which the rollers or rollers are adjustable are included.

Der Getriebeträger kann dagegen aus einem weniger hochfesten Material bestehen, für das Sintermaterial, Kunststoff oder ggf. auch Metall in Frage kommt.The gear carrier, however, can consist of a less high-strength material, for which sintered material, plastic or possibly also metal is suitable.

Ein weiterer Vorteil der zweigeteilten Ausführung des Mitnehmers liegt darin, dass die Mitnehmerscheibe sowohl für rechts laufende als auch für links laufende Freiläufe ohne Änderung der Geometrie eingesetzt werden kann. Durch eine um 180° verkehrte Einbaulage kann die Freilaufrichtung umgekehrt werden.Another advantage of the two-part design of the driver is that the driver disk can be used for both right-handed and left-handed freewheels without changing the geometry. The direction of the freewheel can be reversed if the mounting position is reversed by 180 °.

Gemäß einer weiteren zweckmäßigen Ausführung ist vorgesehen, dass der Getriebeträger und die Mitnehmerscheibe drehfest miteinander verbunden sind. Grundsätzlich genügt aber auch eine Kopplung zwischen diesen Bauteilen mit Spiel bzw. einer Torsionsfedermöglichkeit, um das Moment, welches für den Antrieb des Starterritzels erforderlich ist, zu übertragen. Die Verbindung zwischen Getriebeträger und Mitnehmerscheibe erfolgt beispielsweise durch Pressung oder Verzahnung.According to a further expedient embodiment, it is provided that the gear carrier and the drive plate are connected to one another in a rotationally fixed manner. Basically, however, a coupling between these components with play or a torsion spring option is sufficient to transmit the torque that is required for driving the starter pinion. The connection between the gearbox carrier and drive plate is made, for example, by pressing or toothing.

Gemäß einer weiteren vorteilhaften Ausführung ist das Getriebe als ein Planetengetriebe ausgebildet, welches ein Sonnenrad umfasst, das drehfest mit der Ankerwelle verbunden ist, sowie Planetenräder auf einem Planetenträger, wobei die Planetenräder mit dem Sonnenrad kämmen. Der Planetenträger wird von dem Getriebeträger des Mitnehmers gebildet. Die Planetenräder sind über Achsbolzen in Bohrungen im Planetenträger aufgenommen. Die Bohrungen können den Planetenträger vollständig durchdringen, wobei der Planetenträger vorzugsweise eine ausreichende Dicke aufweist, um zum einen eine sichere Lagerung der Planetenräder über die Achsbolzen zu gewährleisten und zum andern eine ausreichende Festigkeit zur Aufnahme der entstehenden Kräfte und Momente sicherzustellen. Die Achsbolzen können in die Bohrungen eingepresst werden, was für eine sicher Verbindung von Achsbolzen und Planetenträger eine enge Durchmessertoleranz erfordert. Bei einer Fertigung des Planetenträgers aus Kunststoff, Sinterstahl oder einem geeigneten Metall kann das Einpressen der Achsbolzen in die Bohrungen ohne die Gefahr eines Verziehens des Planetenträgers durchgeführt werden. Die Ausführung als durchgehende Bohrung erlaubt außerdem ein einfacheres Einführen der Achsbolzen.According to a further advantageous embodiment, the gear is designed as a planetary gear, which comprises a sun gear, which is non-rotatably connected to the armature shaft, and planet gears on a planet carrier, the planet gears meshing with the sun gear. The planet carrier is formed by the gear carrier of the driver. The planet gears are received in bores in the planet carrier via axle bolts. The bores can completely penetrate the planet carrier, the planet carrier preferably having a sufficient thickness, on the one hand, for secure storage to ensure the planet gears via the axle bolts and on the other hand to ensure sufficient strength to absorb the forces and moments that arise. The axle bolts can be pressed into the holes, which requires a close diameter tolerance for a secure connection of the axle bolts and planet carrier. When the planet carrier is made of plastic, sintered steel or a suitable metal, the axle bolts can be pressed into the bores without the risk of the planet carrier being distorted. The design as a through hole also allows easier insertion of the axle bolts.

Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:

Fig. 1
eine Freilaufeinrichtung in einer Startvorrichtung für Brennkraftmaschinen in Seitenansicht,
Fig. 2
die Freilaufeinrichtung in stirnseitiger Ansicht.
Further advantages and expedient designs can be found in the further claims, the description of the figures and the drawings. Show it:
Fig. 1
a freewheel device in a starting device for internal combustion engines in side view,
Fig. 2
the freewheel device in front view.

In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.In the figures, the same components are provided with the same reference symbols.

In Fig. 1 ist eine Startvorrichtung 1 zum Starten einer Brennkraftmaschine dargestellt. Die Startvorrichtung 1 umfasst eine Ankerwelle 3, welche von einem nicht dargestellten Elektromotor angetrieben wird, und eine Abtriebswelle 4, welche Träger eines Starterritzels 5 ist, das zwischen einer axial zurückgezogenen Position und einer axial vorgerückten Position verstellbar ist, in der das Starterritzel mit einem Zahnkranz einer Brennkraftmaschine in Eingriff steht. Zwischen der Ankerwelle 3 und der Abtriebswelle 4 befindet sich eine Freilaufeinrichtung 2, die sicherstellt, dass nur eine Bewegungsübertragung von der Startvorrichtung 1 auf den Startkranz der Brennkraftmaschine erfolgt, nicht jedoch in Gegenrichtung. Hiermit wird gewährleistet, dass beim Anspringen der Brennkraftmaschine und dem Beschleunigen auf eine höhere Drehzahl als das Starterritzel eine unzulässig hohe Beschleunigung vom Starterkranz auf das Starterritzel verhindert wird.In Fig. 1 A starting device 1 for starting an internal combustion engine is shown. The starting device 1 comprises an armature shaft 3, which is driven by an electric motor, not shown, and an output shaft 4, which is the carrier of a starter pinion 5, which is adjustable between an axially retracted position and an axially advanced position, in which the starter pinion has a ring gear an internal combustion engine is engaged. A freewheel device 2 is located between the armature shaft 3 and the output shaft 4, which ensures that only motion is transmitted from the starting device 1 to the starting ring of the internal combustion engine, but not in the opposite direction. This ensures that when the internal combustion engine starts and accelerates to a higher speed than the starter pinion, an impermissibly high acceleration from the starter ring to the starter pinion is prevented.

Die Freilaufeinrichtung 2 ist über ein Planetengetriebe 6 mit der Ankerwelle 3 verbunden. Das Planetengetriebe 6 umfasst ein Sonnenrad 7, welches auf der Ankerwelle 3 drehfest aufsitzt, sowie mitnehmerseitig mehrere Planetenräder 8, die an Achsbolzen 9 an einem Planetenträger 11 des Mitnehmers 10 gelagert sind und in Eingriff mit dem Sonnenrad 7 stehen.The freewheel device 2 is connected to the armature shaft 3 via a planetary gear 6. The planetary gear 6 comprises a sun gear 7, which is seated on the armature shaft 3 in a rotationally fixed manner, and a plurality of planet gears 8 on the driver side, which are mounted on axle pins 9 on a planet carrier 11 of the driver 10 and are in engagement with the sun gear 7.

Der Mitnehmer 10 umfasst zusätzlich zum Plantetenträger 11 auch eine Mitnehmerscheibe 12, über die die Bewegungs- bzw. Momentenübertragung auf die Abtriebswelle 4 erfolgt. Hierzu weist die Mitnehmerscheibe 12, wie Fig. 1 in Verbindung mit Fig. 2 zu entnehmen, eine keilförmige Aufnahmetasche zur Aufnahme einer Walze oder Rolle 14 auf, welche an der Mantelfläche einer Nabe 15 anliegt, die einteilig mit der Abtriebswelle 4 ausgeführt ist. Die Walze bzw. Rolle 14 wird über ein Federelement 16 in die keilförmige Aufnahmetasche in der Mitnehmerscheibe 12 gedrückt.In addition to the planet carrier 11, the driver 10 also includes a driver disk 12, via which the movement or torque is transmitted to the output shaft 4. For this purpose, the drive plate 12, how Fig. 1 combined with Fig. 2 to see a wedge-shaped receiving pocket for receiving a roller or roller 14, which rests on the outer surface of a hub 15, which is made in one piece with the output shaft 4. The roller or roller 14 is pressed via a spring element 16 into the wedge-shaped receiving pocket in the drive plate 12.

Beim Einspurvorgang wird der Mitnehmer 10 über die Ankerwelle 3 und das Plantetengetriebe 6 in Drehbewegung versetzt, die über die Rollen 14, von denen über den Umfang verteilt mehrere in Aufnahmetaschen vorhanden sind, auf die Nabe 15 zum Antrieb der Abtriebswelle 4 übertragen wird. Sobald die Brennkraftmaschine gestartet ist und der Starterkranz an der Brennkraftmaschine eine höhere Drehzahl als das Starterritzel 5 aufweist, werden die Rollen 14 aus den Aufnahmetaschen herausbewegt, wodurch der Kraftübertragungsweg unterbrochen ist.During the engagement process, the driver 10 is set in rotary motion via the armature shaft 3 and the planetary gear 6, which is transmitted to the hub 15 for driving the output shaft 4 via the rollers 14, of which several are present in receiving pockets distributed over the circumference. As soon as the internal combustion engine has started and the starter ring on the internal combustion engine has a higher speed than the starter pinion 5, the rollers 14 are moved out of the receiving pockets, as a result of which the power transmission path is interrupted.

Der Planetenträger 11 und die Mitnehmerscheibe 12 des Mitnehmers 10 sind als zwei separate Bauteile ausgeführt, die unmittelbar stirnseitig aneinander liegen. Planetenträger 11 und Mitnehmerscheibe 12 sind insbesondere drehfest miteinander gekoppelt, beispielsweise durch Pressung oder Verzahnung. Die Mitnehmerscheibe 12 besteht zweckmäßigerweise aus einem hochfesten Material wie beispielsweise Sinterstahl oder einem sonstigen Stahl. Der Planetenträger 11, in den die Bohrungen zur Aufnahme der Achsbolzen 9 eingebracht sind, besteht dagegen aus einem weicheren Material wie z.B. Sintermaterial, Kunststoff oder einem Metall, das das Einpressen der Achsbolzen 9 mit geringer Toleranz erlaubt. Die Bohrungen zur Aufnahme der Achsbolzen 9 erstrecken sich zweckmäßigerweise in Achsrichtung vollständig durch den Planetenträger 11 hindurch.The planet carrier 11 and the drive plate 12 of the driver 10 are designed as two separate components that lie directly against each other on the end face. Planet carrier 11 and drive plate 12 are in particular coupled to one another in a rotationally fixed manner, for example by pressing or toothing. The drive plate 12 expediently consists of a high-strength material such as sintered steel or other steel. The planet carrier 11, in which the bores for receiving the axle bolts 9 are made, on the other hand, consists of a softer material such as e.g. Sintered material, plastic or a metal that allows the axle bolts 9 to be pressed in with a small tolerance. The bores for receiving the axle bolts 9 expediently extend completely through the planet carrier 11 in the axial direction.

Der Mitnehmer 10 mit dem Planetenträger 11 und der Mitnehmerscheibe 12 ist von einer Abdeckhülse 13 überdeckt.The driver 10 with the planet carrier 11 and the driver plate 12 is covered by a cover sleeve 13.

Claims (13)

  1. Overrunning clutch device in a starter device for internal combustion engines, having a carrier (10) which is connected via a transmission (6) to an armature shaft (3) and to an output shaft (4) which is a carrier of a starter pinion (5), wherein a portion of the carrier (10) forms a transmission carrier (11) of the transmission (6), wherein the transmission carrier (11) of the carrier (10) and a carrier plate (12) connected to the output shaft (4) are designed as separate components, which are coupled in a torque-transmitting manner, wherein the transmission carrier (11) and the carrier plate (12) consist of different materials, characterized in that the carrier plate (12) consists of a high-strength material and the transmission carrier (11) of a less high-strength material, wherein the transmission carrier (11) is formed from sintered material or from metal.
  2. Overrunning clutch device according to claim 1, characterized in that the carrier plate (12) is formed from sintered steel.
  3. Overrunning clutch device according to any one of claims 1 to 2, characterized in that the carrier plate (12) is formed as an extruded part.
  4. Overrunning clutch device according to any one of claims 1 to 3, characterized in that the transmission carrier (11) and the carrier plate (12) are connected in a rotationally fixed manner.
  5. Overrunning clutch device according to any one of claims 1 to 4, characterized in that the transmission carrier (11) and the carrier plate (12) are connected together by pressing.
  6. Overrunning clutch device according to any one of claims 1 to 5, characterized in that the transmission carrier (11) and the carrier plate (12) are connected to one another by toothing.
  7. Overrunning clutch device according to any one of claims 1 to 6, characterized in that the transmission is designed as a planetary transmission (6) and the transmission carrier is designed as a planet carrier (11).
  8. Overrunning clutch according to claim 7, characterized in that the planet carrier (11) is a carrier of planet wheels (8) which are supported on the planet carrier (11) via axial bolts (9).
  9. Overrunning clutch device according to claim 8, characterized in that the axial bolts (9) are inserted in bores in the planet carrier (11), wherein the bores are passing through the planet carrier (11).
  10. Starter device for internal combustion engines with an overrunning clutch device according to any one of claims 1 to 9.
EP11178038.3A 2010-09-09 2011-08-19 Freewheel device in a start device for combustion engines Not-in-force EP2428674B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010040531A DE102010040531A1 (en) 2010-09-09 2010-09-09 Freewheel device in a starting device for internal combustion engines

Publications (2)

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EP2428674A1 EP2428674A1 (en) 2012-03-14
EP2428674B1 true EP2428674B1 (en) 2020-06-24

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EP11178038.3A Not-in-force EP2428674B1 (en) 2010-09-09 2011-08-19 Freewheel device in a start device for combustion engines

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EP (1) EP2428674B1 (en)
CN (1) CN102536579B (en)
DE (1) DE102010040531A1 (en)
HU (1) HUE050649T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012216143B4 (en) * 2012-09-12 2021-03-18 Seg Automotive Germany Gmbh Starting device for an internal combustion engine
DE102013020327B4 (en) * 2013-12-05 2022-05-25 Borgwarner Inc. Starter freewheel and freewheel arrangement with such a starter freewheel
DE102019114455A1 (en) * 2019-05-29 2020-12-03 Seg Automotive Germany Gmbh Freewheel device for a starter and starter for an internal combustion engine

Citations (1)

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Publication number Priority date Publication date Assignee Title
US20090205464A1 (en) * 2008-02-14 2009-08-20 Denso Corporation Starter including one-way clutch and method of manufacturing clutch outer of one-way clutch

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Publication number Priority date Publication date Assignee Title
US4638684A (en) * 1983-10-24 1987-01-27 Luk Lamellen Und Kupplungsbau Gmbh Assembly for taking up and compensating for torque-induced shocks
JPH0320141A (en) * 1989-06-14 1991-01-29 Mitsubishi Electric Corp Planetary reduction gear
JPH05332233A (en) * 1992-05-29 1993-12-14 Mitsubishi Electric Corp Coaxial type starting electric motor
JP3555245B2 (en) * 1995-06-01 2004-08-18 株式会社デンソー Starter
DE19616666B4 (en) 1996-04-26 2004-08-12 Robert Bosch Gmbh Freewheel device for starting devices for internal combustion engines
JP4174820B2 (en) * 2003-03-11 2008-11-05 株式会社デンソー Starter
EP2017497A1 (en) * 2007-06-20 2009-01-21 Ford Global Technologies, LLC Method for starting a combustion engine equipped with a split flywheel and combustion engine for performing such a method
DE102010028415B4 (en) * 2010-04-30 2020-02-13 Seg Automotive Germany Gmbh Freewheel with integrated damping

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US20090205464A1 (en) * 2008-02-14 2009-08-20 Denso Corporation Starter including one-way clutch and method of manufacturing clutch outer of one-way clutch

Also Published As

Publication number Publication date
HUE050649T2 (en) 2020-12-28
EP2428674A1 (en) 2012-03-14
CN102536579A (en) 2012-07-04
DE102010040531A1 (en) 2012-03-15
CN102536579B (en) 2016-05-11

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