WO2008151926A1 - Drive device of a vehicle, especially of a motor vehicle - Google Patents

Drive device of a vehicle, especially of a motor vehicle Download PDF

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Publication number
WO2008151926A1
WO2008151926A1 PCT/EP2008/056476 EP2008056476W WO2008151926A1 WO 2008151926 A1 WO2008151926 A1 WO 2008151926A1 EP 2008056476 W EP2008056476 W EP 2008056476W WO 2008151926 A1 WO2008151926 A1 WO 2008151926A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
rotor
shaft
drive device
electric machine
Prior art date
Application number
PCT/EP2008/056476
Other languages
German (de)
French (fr)
Inventor
Christian Husung
Cafer Ince
Miro Bekavac
Carsten Pabst
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2008151926A1 publication Critical patent/WO2008151926A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • B60K6/405—Housings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • Title Drive device of a vehicle in particular of a motor vehicle
  • the invention relates to a lifting device of a vehicle, in particular of a motor vehicle, with at least one internal combustion engine and at least one electric machine, wherein the electric machine has a rotor bearing and a rotor provided with a shaft, which is rotatably supported by means of the rotor bearing and via the shaft with another, rotating vehicle component, in particular Anthebvoriquessskomponente is coupled.
  • the rotor bearing is a fixed bearing and that the rotor is rotatably mounted on the shaft via a floating bearing. It is thus provided that the rotor bearing is designed as a fixed bearing, which reduces the degrees of freedom of movement of the rotor to a rotational or rotational movement, so that the rotor is fixed axially and radially in position. It is further provided that the rotor is rotatably mounted on the shaft via a floating bearing. The floating bearing thus allows the rotor a certain amount of freedom of movement, so that the overall bearing of the rotor is not overdetermined.
  • the movable bearing preferably allows tilting and / or displacement in the axial and / or radial direction, so that the rotor is not braced and / or jammed due to constructional or operational conditions.
  • the floating bearing thus serves as a tolerance compensation expediently. Due to the fixed bearing, the rotor always runs in a predetermined position, so that the electric machine can be operated very efficiently and a bracing is prevented due to the floating bearing. Where the floating bearing is a non-rotatable connection of rotor and shaft, so that only rotational forces or drive torques are transmitted via the floating bearing. Of course, it does not matter whether the electric machine is running in generator mode or in motor mode.
  • the rotor is rotatably supported by the fixed bearing on the electric machine.
  • the fixed bearing thus expediently forms an element of the electric machine, so that the rotor always rotates / runs in a predetermined position to a stator or stator of the electric machine cooperating with the rotor.
  • the rotor By the storage on the fixed bearing on the electric machine, the rotor always acts optimally together, as already said, with the stator, being mounted on the floating bearing directly on the shaft.
  • the advantageous arrangement allows a particularly space-saving design of the drive device, without compromise in the Operating characteristics of the electric machine or the drive device must be received.
  • the rotor is mounted on the bearing on a bearing plate.
  • the fixed bearing is arranged on a stationary bearing plate, wherein the bearing plate may be part of the electric machine or is formed by the internal combustion engine and / or a further component of the drive device, such as a clutch or a clutch housing.
  • the dynamic forces of the rotor are of both camps of the internal storage of
  • the bearing plate is attached to a housing flange of the internal combustion engine and / or the transmission and / or the electric machine. It is essential that the bearing plate and thus the rotor with respect to the stator of the electric machine is accurately aligned and stored.
  • the bearing plate can be attached to one of the above components of the drive device, for example by means of screwing, clamping, soldering, welding and / or gluing.
  • the shaft is a transmission shaft of a transmission of the drive device and / or a crankshaft of the internal combustion engine.
  • the rotor is thus mounted directly on a shaft of one of the drive components of the drive device.
  • the electric machine itself thus does not have its own shaft, which is coupled to the other, rotating drive train components.
  • the direct storage of the rotor of the electric machine on an existing shaft of the drive device is particularly efficient space savings, the floating bearing, as already described above, allows tolerance compensation. This is particularly important here, since the already existing waves, such as the transmission shaft, already sufficiently stored or determined.
  • the shaft may be an output or drive shaft of a clutch of the drive device.
  • the rotor has a hub receiving the shaft, wherein the hub and the shaft are formed at least in the region of the hub such that together they form the floating bearing.
  • the fixed bearing - as seen in the axial direction - arranged substantially centrally of the rotor or the electric machine on the hub.
  • the hub thus forms together with the shaft, the floating bearing and on the outside of the fixed bearing is arranged.
  • the rotor and / or hub are shaped accordingly so that the central arrangement of the fixed bearing with respect to the rotor is possible.
  • the rotor is mounted rotatably substantially in its center of gravity by means of the fixed bearing and fixed there also axially and radially. This has a favorable effect on the rotational properties of the rotor in each operating state.
  • the fixed bearing is at least one roller bearing, in particular a deep groove ball bearing. It is therefore envisaged that the fixed bearing is formed by one or more rolling bearings / deep groove ball bearings.
  • the rolling bearing is preferably located with its inner ring on the outside of the hub.
  • the hub advantageously has a bearing receptacle which forms an axial stop, to which the rolling bearing or the inner ring of the rolling bearing is pushed.
  • the rolling bearing is advantageously prevented by means of a locking ring or a clamping ring which rests in an open-edge, over the entire circumference of the hub extending groove, to an axial movement or displacement.
  • the bearing receptacle is arranged substantially centrally of the rotor on the hub. Conveniently, an outer ring of the bearing is fixed to the end plate in a similar manner.
  • the bearing plate protrudes at least partially in the axial direction seen in the rotor, with a particularly compact design of the drive device is formed.
  • the floating bearing is formed by a toothing.
  • the toothing is thus designed such that it gives the storage of the rotor on the shaft bearing properties.
  • the rotor points Preferably, an internal toothing and the shaft on an external toothing, which engage with each other, wherein the internal toothing is advantageously arranged on the hub.
  • the internal toothing extends over the entire axial length of the hub.
  • the external toothing of the shaft preferably extends over a wider range than the internal toothing, so that the hub is at least axially displaceable on the shaft, whereby the same torque transmission behavior is always ensured.
  • the internal teeth and the external teeth are also advantageously designed such that the aforementioned tolerance compensation is guaranteed.
  • internal teeth and external teeth are formed such that, for example, a tilting of the shaft in the hub is possible without the rotor with radial (tilting) forces acted upon by the shaft.
  • the toothing is designed such that only a torque transmission between the shaft and rotor or shaft and hub takes place. As a result, tolerances due to temperature-induced changes in length and / or position are effectively compensated.
  • any other shaft-hub connection forming a movable bearing is conceivable, such as a cone clamping set, at least one feather key, a splined shaft, a polygonal profile of shaft and / or hub and / or at least one tensioning element that has at least one degree of freedom of movement allows.
  • Figure a sectional view of an advantageous drive device.
  • the figure shows a sectional view of an embodiment of an advantageous drive device 1 of a motor vehicle.
  • the drive device 1 which is shown here only in sections, has an internal combustion engine 2, the crankshaft 3 via a hydraulically operated friction clutch 4 with a transmission shaft 5 of a transmission 6 is operatively connected.
  • the gear housing 7 suggestive section.
  • an electric machine 8 is arranged between the clutch 4 and the transmission 6 in this case.
  • the electric machine 8 is arranged in a clutch housing 9 of the clutch 4, which extends between a housing 10 of the internal combustion engine and the transmission housing 7.
  • the electric machine 8 has a stator 11 which is fixedly arranged in the housing 9, and a rotor 12 which is arranged directly on the transmission shaft 5.
  • the rotor 12 has a hub 13 in which the transmission shaft 5 is received.
  • the gear shaft 5 has in the region of the hub 13 an external toothing 14 which cooperates with an internal toothing 15 of the hub 13, whereby a toothing 16 between the rotor 12 and gear shaft 5 is formed.
  • the internal toothing 15 extends over the entire axial length of the hub 13.
  • the external toothing 14 extends over a wider range, so that the transmission shaft 5 and rotor 12 are mounted axially displaceable relative to each other so that there is always a sufficient form fit for the transmission of torques available ,
  • the toothing 16 is further designed such that the rotor 12 and the transmission shaft 5 are mutually tiltable and / or radially displaceable relative to each other.
  • the toothing 16 thus forms a movable bearing 17 for the rotor 12 of the electric machine 8. This makes it possible that the axes of rotation of the rotor 12 and the transmission shaft 5 need not be aligned coaxially with each other.
  • the transmission-side end of the hub 13 extends from the hub 13, a web 18 of the rotor 12 initially radially outwardly, then parallel to the hub 13, so that a space 19 is formed, and then again radially outward.
  • the web 18 is connected via a screw connection with a rotor wheel 20 of the rotor 12.
  • On the rotor wheel 20 are circumferentially arranged magnets which cooperate with arranged on the stator 11 windings.
  • a bearing receptacle 21 is formed, which has an axial stop 22.
  • an inner ring 23 of a deep groove ball bearing 24 designed as a rolling bearing 25 is pushed to the stop 22.
  • On the stop 22 opposite side of the bearing seat 21 is an over the entire circumference extending, open-edge groove 26 is formed, in which a locking ring 27 rests.
  • the stop 22 and the locking ring 27 in this case form an axial securing for the inner ring 23 of the rolling bearing 25, so that it is axially fixed on the hub 13 and the rotor 12.
  • the bearing receptacle 21 is advantageously arranged at least substantially in the middle of the rotor 12 or the electric machine 8, so that particularly favorable running conditions for the rotor 12 result.
  • An outer ring 28 of the rolling bearing 25 is mounted in a bearing receptacle 29 of a bearing plate 30 which is fastened by means of a screw 31 on the coupling housing 9.
  • the bearing receptacle 29 also has an axial stop 32, to which the rolling bearing 25 and the outer ring 28 is pushed.
  • An in a over the entire circumference of the bearing receptacle 29 extending, open-edged groove 33 fitting circlip 34 is disposed opposite to the axial stop 32, so that the outer ring 28 of the rolling bearing 25 is held in an axial position.
  • the rolling bearing 25 thus forms a rotor bearing 35, which is designed as a fixed bearing 36.
  • the coupling housing 9 is in this case formed as a housing flange 37, so that the bearing plate 30 is fixed to the housing flange 37 of the transmission 6.
  • the transmission 6 and the electric machine 8 can thus be used as a unit or an assembly.
  • the bearing plate 30 is in this case a component of the electric machine 8.
  • the bearing plate 30 is shaped in such a way that it projects axially into the rotor 12, a circular-cylindrical projection projecting into the bearing receptacle 29 protruding into the free space 19 of the rotor 12, whereby the available space can be advantageously exploited.
  • the bearing 36 ensures that the rotor 12 is always in a predetermined position and rotate, whereas the floating bearing 17 allows tolerance compensation for a shaft 38 of the rotor 12 forming gear shaft 5, wherein the transmission shaft 5, for example, tilted in the hub 13 may lie.
  • the transmission shaft 5 for example, tilted in the hub 13 may lie.
  • operational, temperature-dependent changes in length of the transmission shaft 5 can be compensated.
  • the present drive device 1 provides a particularly simple and cost-effective way, the electric machine 8 in the
  • the rotor has bearing properties of an inherently mounted electric machine 8 and is nevertheless supported directly on the transmission shaft 5.

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

Abstract

The invention relates to a drive device (1) of a vehicle, especially of a motor vehicle, comprising at least one internal combustion engine (2) and at least one electric machine (8), said electric machine (8) having a rotor bearing (35) and a rotor (12) provided with a shaft (38). Said rotor is rotatably received by the rotor bearing (35) and is coupled to an additional, rotating vehicle component, especially a drive device component, via the shaft (38). The invention is characterized in that the rotor bearing (35) is a fixed bearing (36) and that the rotor (12) is received on the shaft (38) via a floating bearing (17) so as to rotate with the shaft.

Description

Beschreibung description
Titel Antriebsvorrichtung eines Fahrzeugs, insbesondere eines KraftfahrzeugsTitle Drive device of a vehicle, in particular of a motor vehicle
Die Erfindung betrifft eine Anthebsvorhchtung eines Fahrzeugs, insbesondere eines Kraftfahrzeugs, mit mindestens einer Brennkraftmaschine und mindestens einer Elektromaschine, wobei die Elektromaschine ein Rotorlager und einen mit einer Welle versehenen Rotor aufweist, der mittels des Rotorlagers drehbar gelagert ist und über die Welle mit einer weiteren, sich drehenden Fahrzeugkomponente, insbesondere Anthebvorrichtungsskomponente, gekoppelt ist.The invention relates to a lifting device of a vehicle, in particular of a motor vehicle, with at least one internal combustion engine and at least one electric machine, wherein the electric machine has a rotor bearing and a rotor provided with a shaft, which is rotatably supported by means of the rotor bearing and via the shaft with another, rotating vehicle component, in particular Anthebvorrichtungsskomponente is coupled.
Stand der TechnikState of the art
Aus dem Stand der Technik sind Antriebsvorrichtungen der eingangs genannten Art bekannt. Diese weisen sowohl eine Brennkraftmaschine als auch eine elektrische Maschine auf, wobei die elektrische Maschine als Startermotor, Generator und/oder als elektrische Antriebsmaschine vorgesehen ist. Aus Gründen der Bauraumoptimierung wurde dabei dazu übergegangen, die Elektromaschine nicht parallel zu der Brennkraftmaschine, sondern in Reihe dazu anzuordnen beziehungsweise zu schalten. So ist beispielsweise aus der DE 199 16 459 A1 eine Elektromaschine bekannt, die zwischen der Brennkraftmaschine und einem sich an die Brennkraftmaschine anschließenden Getriebe geschaltet beziehungsweise angeordnet ist.From the prior art drive devices of the type mentioned are known. These have both an internal combustion engine and an electric machine, wherein the electric machine is provided as a starter motor, generator and / or as an electric drive machine. For reasons of space optimization was thereby transferred to not arrange the electric machine parallel to the internal combustion engine, but in series or to switch. For example, DE 199 16 459 A1 discloses an electric machine which is connected or arranged between the internal combustion engine and a transmission which adjoins the internal combustion engine.
Durch ein derartiges, so genanntes „Add-On-Konzept" ist es möglich, die Elektromaschine platzsparend gegenüber einer über einen Riemen- oder Kettentrieb in einen Antriebsstrang eingebundenen Elektromaschine in die Antriebsvorrichtung einzugliedern. Der Rotor der Elektromaschine ist dabei mittels eines Rotorlagers drehbar gelagert und mit einer Welle versehen, die mit einer weiteren, sich drehenden Fahrzeugkomponente, wie zum Beispiel dem Getriebe, gekoppelt ist, sodass ein Antriebsdrehmoment von der Elektromaschine über das Getriebe auf Antriebsräder des Fahrzeugs übertragen werden kann.By means of such a so-called "add-on concept", it is possible to integrate the electric machine into the drive device in a space-saving manner with respect to a electric machine integrated into a drive train via a belt drive or chain drive provided with a shaft which is coupled to another, rotating vehicle component, such as the transmission, so that a driving torque of the Electric machine can be transmitted via the transmission to drive wheels of the vehicle.
Offenbarung der ErfindungDisclosure of the invention
Erfindungsgemäß ist vorgesehen, dass das Rotorlager ein Festlager ist und dass der Rotor über ein Loslager drehfest auf der Welle gelagert ist. Es ist also vorgesehen, dass das Rotorlager als Festlager ausgebildet ist, welches die Bewegungsfreiheitsgrade des Rotors auf eine Rotations- beziehungsweise Drehbewegung reduziert, sodass der Rotor axial und radial in seiner Position festgelegt ist. Weiterhin ist vorgesehen, dass der Rotor über ein Loslager drehfest auf der Welle gelagert ist. Das Loslager lässt dem Rotor somit einen gewissen Bewegungsfreiraum, sodass die Gesamt-Lagerung des Rotors nicht überbestimmt ist. Das Loslager erlaubt bevorzugt ein Verkippen und/oder ein Verschieben in axialer und/oder radialer Richtung, sodass der Rotor nicht aufgrund von baulichen oder betriebsbedingten Gegebenheiten verspannt und/oder verklemmt. Das Loslager dient hierbei also zweckmäßigerweise als Toleranzausgleich. Aufgrund des Festlagers läuft der Rotor stets in vorgegebener Position, sodass die Elektromaschine besonders effizient betrieben werden kann und ein Verspannen aufgrund des Loslagers verhindert wird. Wobei das Loslager eine drehfeste Verbindung von Rotor und Welle darstellt, sodass über das Loslager lediglich Rotationskräfte beziehungsweise Antriebsmomente übertragen werden. Hierbei spielt es natürlich keine Rolle, ob die Elektromaschine im generatorischen oder im motorischen Betrieb läuft.According to the invention it is provided that the rotor bearing is a fixed bearing and that the rotor is rotatably mounted on the shaft via a floating bearing. It is thus provided that the rotor bearing is designed as a fixed bearing, which reduces the degrees of freedom of movement of the rotor to a rotational or rotational movement, so that the rotor is fixed axially and radially in position. It is further provided that the rotor is rotatably mounted on the shaft via a floating bearing. The floating bearing thus allows the rotor a certain amount of freedom of movement, so that the overall bearing of the rotor is not overdetermined. The movable bearing preferably allows tilting and / or displacement in the axial and / or radial direction, so that the rotor is not braced and / or jammed due to constructional or operational conditions. The floating bearing thus serves as a tolerance compensation expediently. Due to the fixed bearing, the rotor always runs in a predetermined position, so that the electric machine can be operated very efficiently and a bracing is prevented due to the floating bearing. Where the floating bearing is a non-rotatable connection of rotor and shaft, so that only rotational forces or drive torques are transmitted via the floating bearing. Of course, it does not matter whether the electric machine is running in generator mode or in motor mode.
Vorteilhafterweise ist der Rotor über das Festlager drehbar an der Elektromaschine gelagert. Das Festlager bildet also zweckmäßigerweise ein Element der Elektromaschine, sodass der Rotor stets in vorgegebener Position zu einem mit dem Rotor zusammenwirkenden Stator beziehungsweise Ständer der Elektromaschine rotiert/läuft. Durch die Lagerung über das Festlager an der Elektromaschine wirkt der Rotor stets, wie bereits gesagt, mit dem Ständer optimal zusammen, wobei er über das Loslager direkt auf der Welle gelagert ist. Die vorteilhafte Anordnung erlaubt eine besonders bauraumsparende Ausbildung der Antriebsvorrichtung, ohne dass Kompromisse in den Betriebseigenschaften der Elektromaschine beziehungsweise der Antriebsvorrichtung eingegangen werden müssen.Advantageously, the rotor is rotatably supported by the fixed bearing on the electric machine. The fixed bearing thus expediently forms an element of the electric machine, so that the rotor always rotates / runs in a predetermined position to a stator or stator of the electric machine cooperating with the rotor. By the storage on the fixed bearing on the electric machine, the rotor always acts optimally together, as already said, with the stator, being mounted on the floating bearing directly on the shaft. The advantageous arrangement allows a particularly space-saving design of the drive device, without compromise in the Operating characteristics of the electric machine or the drive device must be received.
Besonders bevorzugt ist der Rotor über das Festlager an einem Lagerschild gelagert. Hierbei ist also vorgesehen, dass das Festlager an einem feststehenden Lagerschild angeordnet ist, wobei das Lagerschild ein Teil der Elektromaschine sein kann oder von der Brennkraftmaschine und/oder einer weiteren Komponente der Antriebsvorrichtung, wie zum Beispiel einer Kupplung beziehungsweise eines Kupplungsgehäuses, gebildet wird. Die dynamischen Kräfte des Rotors werden dabei von beiden Lagern der Eigenlagerung derParticularly preferably, the rotor is mounted on the bearing on a bearing plate. In this case, it is thus provided that the fixed bearing is arranged on a stationary bearing plate, wherein the bearing plate may be part of the electric machine or is formed by the internal combustion engine and / or a further component of the drive device, such as a clutch or a clutch housing. The dynamic forces of the rotor are of both camps of the internal storage of
Elektromaschine, also von dem Festlager und dem Loslager aufgenommen. Dies stellt eine Festlagerkombination für den Rotor dar.Electric machine, so absorbed by the fixed bearing and the floating bearing. This represents a fixed bearing combination for the rotor.
Vorteilhafterweise ist das Lagerschild an einem Gehäuseflansch der Brennkraftmaschine und/oder des Getriebes und/oder der Elektromaschine befestig. Wesentlich dabei ist, dass das Lagerschild und damit der Rotor in Bezug auf den Ständer der Elektromaschine genau ausgerichtet und gelagert ist. Das Lagerschild kann beispielsweise mittels Verschrauben, Verklemmen, Verlöten, Verschweißen und/oder Verkleben an einer der obenstehenden Komponenten der Antriebsvorrichtung befestigt werden.Advantageously, the bearing plate is attached to a housing flange of the internal combustion engine and / or the transmission and / or the electric machine. It is essential that the bearing plate and thus the rotor with respect to the stator of the electric machine is accurately aligned and stored. The bearing plate can be attached to one of the above components of the drive device, for example by means of screwing, clamping, soldering, welding and / or gluing.
In einer vorteilhaften Ausbildung der Erfindung ist die Welle eine Getriebewelle eines Getriebes der Antriebsvorrichtung und/oder eine Kurbelwelle der Brennkraftmaschine. Der Rotor ist somit direkt auf einer Welle einer der Antriebskomponenten der Antriebsvorrichtung gelagert. Die Elektromaschine selbst weist somit keine eigene Welle auf, die mit den übrigen, rotierenden Antriebsstrangkomponenten gekoppelt ist. Durch die direkte Lagerung des Rotors der Elektromaschine auf einer bereits vorhandenen Welle der Antriebsvorrichtung wird besonders effizient Bauraum gespart, wobei das Loslager, wie bereits oben beschrieben, einen Toleranzausgleich erlaubt. Dieser ist hierbei insbesondere von Bedeutung, da die bereits vorhandenen Wellen, wie zum Beispiel die Getriebewelle, bereits ausreichend gelagert beziehungsweise bestimmt sind. Auch kann die Welle eine Abtriebs- oder Antriebswelle einer Kupplung der Antriebsvorrichtung sein. Zweckmäßigerweise weist der Rotor eine die Welle aufnehmende Nabe auf, wobei die Nabe und die Welle zumindest im Bereich der Nabe derart ausgebildet sind, dass sie zusammen das Loslager bilden.In an advantageous embodiment of the invention, the shaft is a transmission shaft of a transmission of the drive device and / or a crankshaft of the internal combustion engine. The rotor is thus mounted directly on a shaft of one of the drive components of the drive device. The electric machine itself thus does not have its own shaft, which is coupled to the other, rotating drive train components. The direct storage of the rotor of the electric machine on an existing shaft of the drive device is particularly efficient space savings, the floating bearing, as already described above, allows tolerance compensation. This is particularly important here, since the already existing waves, such as the transmission shaft, already sufficiently stored or determined. Also, the shaft may be an output or drive shaft of a clutch of the drive device. Conveniently, the rotor has a hub receiving the shaft, wherein the hub and the shaft are formed at least in the region of the hub such that together they form the floating bearing.
Bevorzugt ist das Festlager - in axialer Richtung gesehen - im Wesentlichen mittig zu dem Rotor beziehungsweise der Elektromaschine auf der Nabe angeordnet. Auf der Innenseite bildet die Nabe also zusammen mit der Welle das Loslager und auf der Außenseite ist das Festlager angeordnet. Vorteilhafterweise sind Rotor und/oder Nabe derart entsprechend geformt, dass die mittige Anordnung des Festlagers in Bezug auf den Rotor möglich ist. Dadurch ist der Rotor im Wesentlichen in seinem Schwerpunkt drehbar mittels des Festlagers gelagert und auch dort axial sowie radial festgelegt. Dies wirkt sich günstig auf die Rotationseigenschaften des Rotors in jedem Betriebszustand aus.Preferably, the fixed bearing - as seen in the axial direction - arranged substantially centrally of the rotor or the electric machine on the hub. On the inside, the hub thus forms together with the shaft, the floating bearing and on the outside of the fixed bearing is arranged. Advantageously, the rotor and / or hub are shaped accordingly so that the central arrangement of the fixed bearing with respect to the rotor is possible. As a result, the rotor is mounted rotatably substantially in its center of gravity by means of the fixed bearing and fixed there also axially and radially. This has a favorable effect on the rotational properties of the rotor in each operating state.
Nach einer Weiterbildung der Erfindung ist das Festlager mindestens ein Wälzlager, insbesondere ein Rillenkugellager. Es ist also vorgesehen, dass das Festlager von einem oder mehreren Wälzlagern/Rillenkugellagern gebildet wird. Dabei liegt das Wälzlager bevorzugt mit seinem Innenring auf der Außenseite der Nabe auf. Die Nabe weist dazu vorteilhafterweise eine Lageraufnahme auf, die einen Axialanschlag bildet, an den das Wälzlager beziehungsweise der Innenring des Wälzlagers geschoben ist. In die andere (axiale) Richtung ist das Wälzlager vorteilhafterweise mittels eines Sicherungsrings beziehungsweise eines Spannrings, der in einer randoffenen, sich über den gesamten Umfang der Nabe erstreckenden Nut einliegt, an einer axialen Bewegung beziehungsweise Verschiebung gehindert. Die Lageraufnahme ist dabei im Wesentlichen mittig zu dem Rotor auf der Nabe angeordnet. Zweckmäßigerweise ist auf ähnliche Art und Weise ein Außenring des Wälzlagers an dem Lagerschild festgelegt. Das Lagerschild ragt dabei zumindest bereichsweise -in axialer Richtung gesehen- in den Rotor hinein, wobei eine besonders kompakte Bauform der Antriebsvorrichtung entsteht.According to a development of the invention, the fixed bearing is at least one roller bearing, in particular a deep groove ball bearing. It is therefore envisaged that the fixed bearing is formed by one or more rolling bearings / deep groove ball bearings. In this case, the rolling bearing is preferably located with its inner ring on the outside of the hub. For this purpose, the hub advantageously has a bearing receptacle which forms an axial stop, to which the rolling bearing or the inner ring of the rolling bearing is pushed. In the other (axial) direction, the rolling bearing is advantageously prevented by means of a locking ring or a clamping ring which rests in an open-edge, over the entire circumference of the hub extending groove, to an axial movement or displacement. The bearing receptacle is arranged substantially centrally of the rotor on the hub. Conveniently, an outer ring of the bearing is fixed to the end plate in a similar manner. The bearing plate protrudes at least partially in the axial direction seen in the rotor, with a particularly compact design of the drive device is formed.
Weiterhin ist vorgesehen, dass das Loslager von einer Verzahnung gebildet ist. Die Verzahnung ist dabei also derart ausgebildet, dass sie der Lagerung des Rotors auf der Welle Loslagereigenschaften gibt. Hierbei weist der Rotor bevorzugt eine Innenverzahnung und die Welle eine Außenverzahnung auf, die ineinandergreifen, wobei die Innenverzahnung zweckmäßigerweise an der Nabe angeordnet ist. Vorteilhafterweise erstreckt sich die Innenverzahnung über die gesamte axiale Länge der Nabe. Bevorzugt erstreckt sich die Außenverzahnung der Welle -in axialer Richtung gesehen- über einen weiteren Bereich als die Innenverzahnung, sodass die Nabe auf der Welle zumindest axial verschieblich ist, wobei stets das gleiche Drehmoment-Übertragungsverhalten gewährleistet ist. Die Innenverzahnung und die Außenverzahnung sind darüber hinaus vorteilhafterweise derart ausgebildet, dass der zuvor erwähnte Toleranzausgleich gewährleistet ist. Dabei sind Innenverzahnung und Außenverzahnung derart ausgebildet, dass zum Beispiel ein Verkippen der Welle in der Nabe möglich ist, ohne dass der Rotor mit radialen (Kipp-) Kräften von der Welle beaufschlagt ist. Die Verzahnung ist derart ausgebildet, dass lediglich eine Drehmomentübertragung zwischen Welle und Rotor beziehungsweise Welle und Nabe stattfindet. Hierdurch werden auch Toleranzen aufgrund von auftretenden temperaturbedingten Längen- und/oder Lageänderungen wirkungsvoll ausgeglichen. Alternativ zu der Verzahnung ist auch jede andere ein Loslager bildende Welle-Nabe-Verbindung denkbar, wie zum Beispiel ein Kegelspannsatz, mindestens eine Passfeder, eine Keilwelle, ein Polygonprofil von Welle und/oder Nabe und/oder mindestens ein Spannelement, das zumindest einen Bewegungsfreiheitsgrad zulässt.Furthermore, it is provided that the floating bearing is formed by a toothing. The toothing is thus designed such that it gives the storage of the rotor on the shaft bearing properties. Here, the rotor points Preferably, an internal toothing and the shaft on an external toothing, which engage with each other, wherein the internal toothing is advantageously arranged on the hub. Advantageously, the internal toothing extends over the entire axial length of the hub. The external toothing of the shaft preferably extends over a wider range than the internal toothing, so that the hub is at least axially displaceable on the shaft, whereby the same torque transmission behavior is always ensured. The internal teeth and the external teeth are also advantageously designed such that the aforementioned tolerance compensation is guaranteed. In this case, internal teeth and external teeth are formed such that, for example, a tilting of the shaft in the hub is possible without the rotor with radial (tilting) forces acted upon by the shaft. The toothing is designed such that only a torque transmission between the shaft and rotor or shaft and hub takes place. As a result, tolerances due to temperature-induced changes in length and / or position are effectively compensated. As an alternative to the tooth system, any other shaft-hub connection forming a movable bearing is conceivable, such as a cone clamping set, at least one feather key, a splined shaft, a polygonal profile of shaft and / or hub and / or at least one tensioning element that has at least one degree of freedom of movement allows.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Im Folgenden soll die Erfindung anhand einer Figur näher erläutert werden. Dazu zeigt dieIn the following, the invention will be explained in more detail with reference to a figure. This shows the
Figur eine Schnittdarstellung einer vorteilhaften Antriebsvorrichtung.Figure a sectional view of an advantageous drive device.
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
Die Figur zeigt in einer Schnittdarstellung ein Ausführungsbeispiel einer vorteilhaften Antriebsvorrichtung 1 eines Kraftfahrzeugs. Die Antriebsvorrichtung 1 , die hier nur abschnittsweise dargestellt ist, weist eine Brennkraftmaschine 2 auf, deren Kurbelwelle 3 über eine hydraulisch betätigte Reibkupplung 4 mit einer Getriebewelle 5 eines Getriebes 6 wirkverbindbar ist. Von dem Getriebe 6 ist hier nur ein kleiner, das Getriebegehäuse 7 andeutender Abschnitt dargestellt. Zwischen der Kupplung 4 und dem Getriebe 6 ist hierbei eine Elektromaschine 8 angeordnet. Die Elektromaschine 8 ist in einem Kupplungsgehäuse 9 der Kupplung 4, welches sich zwischen einem Gehäuse 10 der Brennkraftmaschine und dem Getriebegehäuse 7 erstreckt, angeordnet. Die Elektromaschine 8 weist einen Ständer 11 auf, der fest in dem Gehäuse 9 angeordnet ist, und einen Rotor 12, der direkt auf der Getriebewelle 5 angeordnet ist.The figure shows a sectional view of an embodiment of an advantageous drive device 1 of a motor vehicle. The drive device 1, which is shown here only in sections, has an internal combustion engine 2, the crankshaft 3 via a hydraulically operated friction clutch 4 with a transmission shaft 5 of a transmission 6 is operatively connected. Of the gear 6 is shown here only a small, the gear housing 7 suggestive section. Between the clutch 4 and the transmission 6 in this case an electric machine 8 is arranged. The electric machine 8 is arranged in a clutch housing 9 of the clutch 4, which extends between a housing 10 of the internal combustion engine and the transmission housing 7. The electric machine 8 has a stator 11 which is fixedly arranged in the housing 9, and a rotor 12 which is arranged directly on the transmission shaft 5.
Der Rotor 12 weist eine Nabe 13 auf, in der die Getriebewelle 5 aufgenommen ist. Die Getriebewelle 5 weist im Bereich der Nabe 13 eine Außenverzahnung 14 auf, die mit einer Innenverzahnung 15 der Nabe 13 zusammenwirkt, wodurch eine Verzahnung 16 zwischen Rotor 12 und Getriebewelle 5 gebildet ist. Die Innenverzahnung 15 erstreckt sich dabei über die gesamte axiale Länge der Nabe 13. Die Außenverzahnung 14 erstreckt sich über einen weiteren Bereich, sodass Getriebewelle 5 und Rotor 12 axial zueinander verschiebbar so gelagert sind, dass stets ein ausreichender Formschluss zur Übertragung von Drehmomenten zur Verfügung steht. Vorteilhafterweise ist die Verzahnung 16 weiterhin derart ausgebildet, dass Rotor 12 und Getriebewelle 5 zueinander verkippbar und/oder radial zueinander verschiebbar sind. Die Verzahnung 16 bildet somit ein Loslager 17 für den Rotor 12 der Elektromaschine 8. Dadurch wird ermöglicht, dass die Drehachsen des Rotors 12 und der Getriebewelle 5 nicht koaxial zueinander ausgerichtet sein müssen.The rotor 12 has a hub 13 in which the transmission shaft 5 is received. The gear shaft 5 has in the region of the hub 13 an external toothing 14 which cooperates with an internal toothing 15 of the hub 13, whereby a toothing 16 between the rotor 12 and gear shaft 5 is formed. The internal toothing 15 extends over the entire axial length of the hub 13. The external toothing 14 extends over a wider range, so that the transmission shaft 5 and rotor 12 are mounted axially displaceable relative to each other so that there is always a sufficient form fit for the transmission of torques available , Advantageously, the toothing 16 is further designed such that the rotor 12 and the transmission shaft 5 are mutually tiltable and / or radially displaceable relative to each other. The toothing 16 thus forms a movable bearing 17 for the rotor 12 of the electric machine 8. This makes it possible that the axes of rotation of the rotor 12 and the transmission shaft 5 need not be aligned coaxially with each other.
An dem - in axialer Richtung gesehen - getriebeseitigen Ende der Nabe 13 erstreckt sich von der Nabe 13 ein Steg 18 des Rotors 12 zunächst radial nach außen, dann parallel zur Nabe 13, sodass ein Freiraum 19 gebildet wird, und anschließend wieder radial nach außen. An seinem freien, äußeren Ende ist der Steg 18 über eine Verschraubung mit einem Rotorrad 20 des Rotors 12 verbunden. Auf dem Rotorrad 20 sind umfänglich Magnete angeordnet, die mit am Ständer 11 angeordneten Wicklungen zusammenwirken. An dem vom Getriebe wegweisenden Ende der Nabe 13 ist eine Lageraufnahme 21 ausgebildet, die einen axialen Anschlag 22 aufweist. Auf die Lageraufnahme 21 ist ein Innenring 23 eines als Rillenkugellager 24 ausgebildeten Wälzlagers 25 bis an den Anschlag 22 aufgeschoben. Auf der dem Anschlag 22 gegenüberliegenden Seite der Lageraufnahme 21 ist eine sich über den gesamten Umfang erstreckende, randoffene Nut 26 ausgebildet, in der ein Sicherungsring 27 einliegt. Der Anschlag 22 und der Sicherungsring 27 bilden hierbei eine axiale Sicherung für den Innenring 23 des Wälzlagers 25, sodass dieses auf der Nabe 13 beziehungsweise dem Rotor 12 axial festgelegt ist. Die Lageraufnahme 21 ist mit Vorteil zumindest im Wesentlichen mittig zu dem Rotor 12 beziehungsweise der Elektromaschine 8 angeordnet, sodass sich besonders günstige Laufbedingungen für den Rotor 12 ergeben. Ein Außenring 28 des Wälzlagers 25 ist in eine Lageraufnahme 29 eines Lagerschilds 30, das mittels einer Verschraubung 31 am Kupplungsgehäuse 9 befestigt ist, angebracht. Die Lageraufnahme 29 weist ebenfalls einen Axialanschlag 32 auf, bis zu dem das Wälzlager 25 beziehungsweise der Außenring 28 aufgeschoben ist. Ein in einer sich über den gesamten Umfang der Lageraufnahme 29 erstreckenden, randoffenen Nut 33 einliegender Sicherungsring 34 ist gegenüber dem Axialanschlag 32 angeordnet, sodass der Außenring 28 des Wälzlagers 25 in einer axialen Position festgehalten ist. Das Wälzlager 25 bildet somit ein Rotorlager 35, das als Festlager 36 ausgebildet ist. Über das Festlager 36 ist der Rotor 12 drehbar gelagert, wobei das Festlager 36 die Position des Rotors 12 sowie seine Drehachse festlegt. Das Kupplungsgehäuse 9 ist hierbei als Gehäuseflansch 37 ausgebildet, sodass das Lagerschild 30 an dem Gehäuseflansch 37 des Getriebes 6 befestigt ist. Das Getriebe 6 und die Elektromaschine 8 können somit als eine Einheit beziehungsweise eine Baugruppe verwendet werden. Das Lagerschild 30 stellt dabei einen Bestandteil der Elektromaschine 8 dar. Das Lagerschild 30 ist dabei derart geformt, dass es - axial gesehen - in den Rotor 12 hineinragt, wobei ein die Lageraufnahme 29 aufweisender, kreiszylinderförmiger Vorsprung in den Freiraum 19 des Rotors 12 hineinragt, wodurch der vorhandene Bauraum vorteilhaft ausgenutzt werden kann.At the - seen in the axial direction - the transmission-side end of the hub 13 extends from the hub 13, a web 18 of the rotor 12 initially radially outwardly, then parallel to the hub 13, so that a space 19 is formed, and then again radially outward. At its free, outer end, the web 18 is connected via a screw connection with a rotor wheel 20 of the rotor 12. On the rotor wheel 20 are circumferentially arranged magnets which cooperate with arranged on the stator 11 windings. At the end facing away from the transmission of the hub 13, a bearing receptacle 21 is formed, which has an axial stop 22. On the bearing seat 21, an inner ring 23 of a deep groove ball bearing 24 designed as a rolling bearing 25 is pushed to the stop 22. On the stop 22 opposite side of the bearing seat 21 is an over the entire circumference extending, open-edge groove 26 is formed, in which a locking ring 27 rests. The stop 22 and the locking ring 27 in this case form an axial securing for the inner ring 23 of the rolling bearing 25, so that it is axially fixed on the hub 13 and the rotor 12. The bearing receptacle 21 is advantageously arranged at least substantially in the middle of the rotor 12 or the electric machine 8, so that particularly favorable running conditions for the rotor 12 result. An outer ring 28 of the rolling bearing 25 is mounted in a bearing receptacle 29 of a bearing plate 30 which is fastened by means of a screw 31 on the coupling housing 9. The bearing receptacle 29 also has an axial stop 32, to which the rolling bearing 25 and the outer ring 28 is pushed. An in a over the entire circumference of the bearing receptacle 29 extending, open-edged groove 33 fitting circlip 34 is disposed opposite to the axial stop 32, so that the outer ring 28 of the rolling bearing 25 is held in an axial position. The rolling bearing 25 thus forms a rotor bearing 35, which is designed as a fixed bearing 36. About the fixed bearing 36 of the rotor 12 is rotatably mounted, wherein the fixed bearing 36 determines the position of the rotor 12 and its axis of rotation. The coupling housing 9 is in this case formed as a housing flange 37, so that the bearing plate 30 is fixed to the housing flange 37 of the transmission 6. The transmission 6 and the electric machine 8 can thus be used as a unit or an assembly. The bearing plate 30 is in this case a component of the electric machine 8. The bearing plate 30 is shaped in such a way that it projects axially into the rotor 12, a circular-cylindrical projection projecting into the bearing receptacle 29 protruding into the free space 19 of the rotor 12, whereby the available space can be advantageously exploited.
Im Betrieb sorgt das Festlager 36 dafür, dass der Rotor 12 sich stets in einer vorgegebenen Position befindet und rotiert, wohingegen das Loslager 17 einen Toleranzausgleich für die eine Welle 38 des Rotors 12 bildende Getriebewelle 5 erlaubt, wobei die Getriebewelle 5 beispielsweise verkippt in der Nabe 13 liegen kann. Dadurch wird eine Überbestimmung des Rotors 12 beziehungsweise ein Verklemmen oder Verspannen der Elektromaschine 8 auf einfache Art und Weise verhindert. Gleichzeitig können betriebsbedingte, temperaturabhängige Längenänderungen der Getriebewelle 5 ausgeglichen werden.In operation, the bearing 36 ensures that the rotor 12 is always in a predetermined position and rotate, whereas the floating bearing 17 allows tolerance compensation for a shaft 38 of the rotor 12 forming gear shaft 5, wherein the transmission shaft 5, for example, tilted in the hub 13 may lie. As a result, an over-determination of the rotor 12 or a jamming or distortion of the electric machine 8 in a simple way and Way prevented. At the same time, operational, temperature-dependent changes in length of the transmission shaft 5 can be compensated.
Insgesamt bietet die vorliegende Antriebsvorrichtung 1 eine besonders einfache und kostengünstige Möglichkeit, die Elektromaschine 8 in dieOverall, the present drive device 1 provides a particularly simple and cost-effective way, the electric machine 8 in the
Antriebsvorrichtung 1 zu integrieren. Wobei der Rotor Lagerungseigenschaften einer eigengelagerten Elektromaschine 8 aufweist und dennoch direkt auf der Getriebewelle 5 gelagert ist.To integrate drive device 1. The rotor has bearing properties of an inherently mounted electric machine 8 and is nevertheless supported directly on the transmission shaft 5.
Natürlich ist es auch denkbar, die Elektromaschine 8 beziehungsweise den Rotor 12 der Elektromaschine 8 direkt auf der Kurbelwelle 3 oder einer zu der Kupplung 4 gehörenden Welle zu lagern. Wesentlich dabei ist, dass der Rotor 12 direkt über eine Loslagerung auf der entsprechenden Welle drehfest und über eine Festlagerung drehbar an der Antriebsvorrichtung gelagert ist. Of course, it is also conceivable to store the electric machine 8 or the rotor 12 of the electric machine 8 directly on the crankshaft 3 or a shaft belonging to the clutch 4. It is essential that the rotor 12 is rotatably mounted directly on a floating bearing on the corresponding shaft and rotatably mounted on a fixed bearing on the drive device.

Claims

Ansprüche claims
1. Antriebsvorrichtung eines Fahrzeugs, insbesondere eines Kraftfahrzeugs, mit mindestens einer Brennkraftmaschine und mindestens einer Elektromaschine, wobei die Elektromaschine ein Rotorlager und einen mit einer Welle versehenen Rotor aufweist, der mittels des Rotorlagers drehbar gelagert und über die Welle mit einer weiteren, sich drehenden Fahrzeugkomponente, insbesondere Antriebsvorrichtungskomponente, gekoppelt ist, dadurch gekennzeichnet, dass das Rotorlager (35) ein Festlager (36) ist und das der Rotor (12) über ein Loslager (17) drehfest auf der Welle (38) gelagert ist.1. Drive device of a vehicle, in particular of a motor vehicle, with at least one internal combustion engine and at least one electric machine, wherein the electric machine has a rotor bearing and a rotor provided with a shaft rotatably supported by means of the rotor bearing and via the shaft with a further, rotating vehicle component , In particular drive device component is coupled, characterized in that the rotor bearing (35) is a fixed bearing (36) and that the rotor (12) via a movable bearing (17) rotatably mounted on the shaft (38).
2. Antriebsvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass der Rotor (12) über das Festlager (36) drehbar an der Elektromaschine (8) gelagert ist.2. Drive device according to claim 1, characterized in that the rotor (12) via the fixed bearing (36) is rotatably mounted on the electric machine (8).
3. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (12) über das Festlager (36) an einem Lagerschild (30) an der Elektromaschine (8) gelagert ist.3. Drive device according to one of the preceding claims, characterized in that the rotor (12) via the fixed bearing (36) is mounted on a bearing plate (30) on the electric machine (8).
4. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Lagerschild (30) an einem Gehäuseflansch (37) der Brennkraftmaschine (2) und/oder des Getriebes (6) befestigt ist.4. Drive device according to one of the preceding claims, characterized in that the bearing plate (30) on a housing flange (37) of the internal combustion engine (2) and / or the transmission (6) is attached.
5. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (38) eine Getriebewelle (5) eines Getriebes (6) und/oder eine Kurbelwelle (3) der Brennkraftmaschine (2) ist.5. Drive device according to one of the preceding claims, characterized in that the shaft (38) is a transmission shaft (5) of a transmission (6) and / or a crankshaft (3) of the internal combustion engine (2).
6. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (12) eine die Welle (38) aufnehmende6. Drive device according to one of the preceding claims, characterized in that the rotor (12) has a shaft (38) receiving
Nabe (13) aufweist.Hub (13).
7. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Festlager (36) -in axialer Richtung gesehen- im Wesentlichen mittig zum Rotor (12) auf der Nabe (13) angeordnet ist. 7. Drive device according to one of the preceding claims, characterized in that the fixed bearing (36) seen in the axial direction is arranged substantially centrally of the rotor (12) on the hub (13).
8. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Festlager (36) mindestens ein Wälzlager (25), insbesondere ein Rillenkugellager (24) ist.8. Drive device according to one of the preceding claims, characterized in that the fixed bearing (36) at least one rolling bearing (25), in particular a deep groove ball bearing (24).
9. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Loslager (17) von einer Verzahnung (16) gebildet ist.9. Drive device according to one of the preceding claims, characterized in that the movable bearing (17) by a toothing (16) is formed.
10. Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Loslager (17) von einem Kegelspannsatz, mindestens einer Passfeder, einer Keilwelle, mindestens einem Spannelement und/oder einem Polygonprofil gebildet ist.10. Drive device according to one of the preceding claims, characterized in that the floating bearing (17) is formed by a cone clamping set, at least one key, a splined shaft, at least one clamping element and / or a polygonal profile.
11.Antriebsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (12) eine Innenverzahnung (15) und die Welle (38) eine Außenverzahnung (14) aufweist. 11.Antriebsvorrichtung according to any one of the preceding claims, characterized in that the rotor (12) has an internal toothing (15) and the shaft (38) has an external toothing (14).
PCT/EP2008/056476 2007-06-14 2008-05-27 Drive device of a vehicle, especially of a motor vehicle WO2008151926A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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DE102007027490A DE102007027490A1 (en) 2007-06-14 2007-06-14 Drive device of a vehicle, in particular of a motor vehicle

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WO2006034520A1 (en) * 2004-09-27 2006-04-06 Magna Steyr Fahrzeugtechnik Ag & Co Kg Drive unit for motor vehicles with hybrid drive in a longitudinal arrangement
FR2881380A1 (en) * 2005-02-01 2006-08-04 Peugeot Citroen Automobiles Sa Reversible rotating machine rotor and input shaft coupling device for motor vehicle, has crown gear and central sleeve whose ends are centered in respective rotor`s hub and shaft, based on sliding adjustment of ends, hub sleeve and shaft

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