WO2009144149A1 - Engine/transmission unit with electric machine - Google Patents

Engine/transmission unit with electric machine Download PDF

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Publication number
WO2009144149A1
WO2009144149A1 PCT/EP2009/055998 EP2009055998W WO2009144149A1 WO 2009144149 A1 WO2009144149 A1 WO 2009144149A1 EP 2009055998 W EP2009055998 W EP 2009055998W WO 2009144149 A1 WO2009144149 A1 WO 2009144149A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
stator
engine
screws
transmission unit
Prior art date
Application number
PCT/EP2009/055998
Other languages
German (de)
French (fr)
Inventor
Thomas Sippel
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2009144149A1 publication Critical patent/WO2009144149A1/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
    • B60K6/485—Motor-assist 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
    • B60K6/24—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 combustion engines
    • 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
    • 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
    • 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
    • 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

  • the present invention relates to an engine / transmission unit with an electric machine integrated in the drive train between an internal combustion engine and a transmission whose stator is screwed to a housing on the internal combustion engine with first screws by means of a stator carrier arranged inside a transmission housing.
  • the stator is provided on the motor side with an annular flange, the inner diameter of which is partially smaller than the outer diameter of the stator in conventional constructions. This is necessary to screw the fixing screws for the stator from the motor side in blind thread in the annular flange.
  • annular flange In order to achieve sealing to the motor housing, because of the through holes in the motor housing for the mounting bolts, it is necessary to seal the sealing surface between the stator flange and the motor housing with a gasket, with a large number of screw connections necessary to ensure uniformity and thus to achieve a dense system of the stator carrier on the motor housing. It is also problematic that the radially inwardly projecting annular flange covers a part of the end face of the stator, so that this space is not available for the connections of the winding of the stator or for the arrangement of electrical components.
  • the object of the invention is to provide an engine / transmission unit with an integrated electric machine, which provides an improved seal between the transmission housing and the housing provided on the motor and more favorable installation space ratios.
  • the object of the invention is achieved in that, in a motor / gear unit of the type mentioned, the stator carrier is widened radially outwards, at least in the area of the screwed connections, and the first screws for screwing the stator carrier engage the motor housing in blind thread in the motor housing.
  • each have a radially outwardly projecting connecting strap is provided in the region of the screw connections between the stator and the motor housing.
  • a radially outwardly projecting connecting strap is provided in the region of the screw connections between the stator and the motor housing.
  • annular flange instead of a continuous, radially outwardly projecting annular flange allow individual connecting straps a slimmer version of the transmission housing, which then has radial recesses, for example in the region of the connecting straps.
  • the gear housing is screwed to the motor housing with second screws, wherein in the case of radial recesses of the gear housing lying connection straps of the stator support, the first screws for fixing the stator support on the circumference between the second screws for fastening the gear housing are arranged.
  • the pitch circle diameter for both screw connections may be the same or at least approximately the same, with an identical pitch circle diameter simplifying the manufacture of the blind holes in the motor housing.
  • the number of first screws may be equal to the number of second screws, in which case, seen alternately, first and second screws are arranged circumferentially, but the number of first screws may also be smaller since, as already mentioned in detail The screwing of the first screws no seal between the stator and the motor housing must be achieved.
  • a coolant channel can be arranged between the gearbox housing and the stator carrier in a manner known per se, which is sealed by seals which, on the other hand, directly seal against the stator carrier on the one hand and the gearbox housing on the other hand.
  • a coolant channel can be realized in the manufacture of the housing parts without much effort.
  • FIG. 1 is a sectional view of a motor / Getriebeein- unit with integrated electric machine according to the prior art
  • Fig. 2 is a sectional view of a motor / gear unit according to the invention.
  • a motor / gear unit 100 is shown in the prior art, in which an electric machine 102 is integrated.
  • the electric machine 102 converts stored electrical energy in drive power on the one hand in on-board batteries, on the other hand can generate electrical energy during coasting but also in the action of a generator, which is then stored in the on-board batteries.
  • the electric machine 102 is integrated within a transmission housing 104 in the drive train, which is flanged to a motor housing 106.
  • a stator support 110 is provided, which is screwed to the motor housing 106 by means of first screws 112.
  • the screws 112 are guided from the inside of the motor housing 106 through through holes 114 in the end face of the motor housing and screwed into blind holes 116 with internal threads. It is necessary, on the one hand at the flange between the gear housing 104 and the motor housing 106 to form a first sealing surface 118 to prevent the escape of gear oil, but it is also necessary, the contact surface 120 between the stator 110 and the motor housing 106 to the To seal through holes 114, to prevent a passage between the interior of the motor housing and the interior of the transmission case 104.
  • the stator support 110 has an annular flange 122, in which the blind bores 116 are arranged.
  • the inner diameter of the annular flange 122 is smaller than the outer diameter of the stator 108, which is unfavorable insofar as the end face has to be used to energize the stator windings and optionally also electrical components for the control of the electric machine 102 are to be provided there.
  • Common is the formation of a coolant channel 124 between the stator 110 and the gear housing 104, wherein the sealing takes place by means of sealing elements 126 directly between these two parts.
  • Fig. 2 shows in the same representation a section through an inventive engine / transmission unit 10, in turn, an electric machine 12 is integrated.
  • the electric machine 12 is in turn arranged within a transmission housing 14, which is flanged to a motor housing 16.
  • a stator 18 of the electric machine 12 is screwed by means of a stator 20 against the motor housing 16.
  • the stator carrier 20 is formed with radially outwardly projecting connecting straps 32, in which through holes 24 are provided, through which first fastening screws 22 are screwed from the transmission side in threaded sack holes 26 in the motor housing 16. Since passage points between the interior of the motor housing 16 and the gear housing 14 for the screw connection are completely avoided, eliminating the second sealing surface, d.
  • the inner diameter of the stator carrier 20 is also embodied in the region between the stator 18 and the motor housing 16 in accordance with the outer diameter of the stator 18, so that there is space for the connections of the stator windings and possibly further components on the front side of the stator 18 is.
  • the stator 18 can also move closer to the motor housing 16, so that a larger stator with a correspondingly higher output of the electric machine can be used with the same axial construction requirement, or, if desired, with constant power of the axial space can be reduced.
  • the connecting straps 32 lie in the region of radial recesses 30 in the gearbox housing 14, the flange bolts for fastening the gearbox housing 14 to the motor housing 16 being situated over the circumference between the fastening screws 22 of the stator carrier 20.
  • the number of fastening screws can be significantly reduced compared to the variant shown in Fig. 1 according to the prior art, because no uniform contact pressure to achieve the seal must be given more.
  • Sealing elements 36 is sealed and is directly limited by the gear housing 14 and the stator 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

An engine/transmission unit (10) has an electric machine (12) integrated between an internal combustion engine and a transmission. The stator (18) is screwed to a housing on the internal combustion engine (16) by means of a stator carrier (18) which is arranged within a transmission housing (14). To avoid the use of a separate seal between the interior of the housing (16) and the interior of the transmission housing (14) and to increase the radial installation space between the stator (18) and the housing (16), it is provided that the stator carrier (18) is widened in the radially outward direction at least in the region of the screw connections (22), and the screws (22) for screwing the stator carrier (20) to the housing (16) engage in blind threaded holes (26) in the housing (16).

Description

Beschreibungdescription
Motor-/Getriebeeinheit mit ElektromaschineMotor / gear unit with electric machine
Die vorliegende Erfindung befasst sich mit einer Motor-/Ge- triebeeinheit mit einer zwischen einem Verbrennungsmotor und einem Getriebe in den Antriebsstrang integrierten Elektromaschine, deren Stator mittels eines innerhalb eines Getriebegehäuses angeordneten Statorträgers mit einem Gehäuse am Ver- brennungsmotor mit ersten Schrauben verschraubt ist.The present invention relates to an engine / transmission unit with an electric machine integrated in the drive train between an internal combustion engine and a transmission whose stator is screwed to a housing on the internal combustion engine with first screws by means of a stator carrier arranged inside a transmission housing.
Aufgrund der sehr beengten Raumverhältnisse ist bei üblichen Konstruktionen der Statorträger motorseitig mit einem Ringflansch versehen, dessen Innendurchmesser partiell kleiner ist als der Außendurchmesser des Stators. Dies ist notwendig, um die Befestigungsschrauben für den Statorträger von der Motorseite her in Sackgewinde in dem Ringflansch einzuschrauben. Um eine Abdichtung zum Motorgehäuse hin zu erreichen ist es wegen der Durchgangsbohrungen im Motorgehäuse für die Be- festigungsschrauben notwendig, die Dichtungsfläche zwischen dem Ringflansch des Statorträgers und dem Motorgehäuses mit einer Dichtung abzudichten, wobei eine Vielzahl von Ver- schraubungen notwendig ist, um eine gleichmäßige und damit dichte Anlage des Statorträgers am Motorgehäuse zu erreichen. Problematisch ist auch, dass der radial nach innen ragende Ringflansch einen Teil der Stirnseite des Stators verdeckt, so dass dieser Raum für die Anschlüsse der Wicklung des Stators oder zur Anordnung von elektrischen Bauelementen nicht zur Verfügung steht.Due to the very tight space conditions, the stator is provided on the motor side with an annular flange, the inner diameter of which is partially smaller than the outer diameter of the stator in conventional constructions. This is necessary to screw the fixing screws for the stator from the motor side in blind thread in the annular flange. In order to achieve sealing to the motor housing, because of the through holes in the motor housing for the mounting bolts, it is necessary to seal the sealing surface between the stator flange and the motor housing with a gasket, with a large number of screw connections necessary to ensure uniformity and thus to achieve a dense system of the stator carrier on the motor housing. It is also problematic that the radially inwardly projecting annular flange covers a part of the end face of the stator, so that this space is not available for the connections of the winding of the stator or for the arrangement of electrical components.
Die Aufgabe der Erfindung besteht darin, eine Motor-/Getrie- beeinheit mit einer integrierten Elektromaschine zu schaffen, die eine verbesserte Abdichtung zwischen Getriebegehäuse und dem an dem Motor vorgesehenen Gehäuse und günstigere Bauraum- Verhältnisse schafft. Die Aufgabe der Erfindung wird dadurch gelöst, dass bei einer Motor-/Getriebeeinheit der eingangs genannten Art der Statorträger wenigstens im Bereich der Verschraubungen radial nach außen erweitert ist und die ersten Schrauben zum Verschrauben des Statorträgers mit dem Motorgehäuse in Sackgewinde in dem Motorgehäuse eingreifen.The object of the invention is to provide an engine / transmission unit with an integrated electric machine, which provides an improved seal between the transmission housing and the housing provided on the motor and more favorable installation space ratios. The object of the invention is achieved in that, in a motor / gear unit of the type mentioned, the stator carrier is widened radially outwards, at least in the area of the screwed connections, and the first screws for screwing the stator carrier engage the motor housing in blind thread in the motor housing.
Durch die Verlagerung des Lochkreisdurchmessers der Befestigungsschrauben für den Statorträger radial nach außen einer- seits und die Umkehrung der Einschraubrichtung andererseits in Sackgewinde in dem Motorgehäuse ist es zum einen möglich, den Bauraum zwischen dem Stator und dem Motorgehäuse radial nach außen hin zu erweitern, so dass dort mehr Raum für die elektrischen Anschlüsse und gegebenenfalls die Anordnung von elektrischen Bauelementen gegeben ist. Durch die Umkehrung der Einschraubrichtung kann außerdem die zusätzliche Abdichtung zwischen dem Statorträger und dem Motorgehäuse entfallen, da keine Durchgangsbohrung mehr zwischen dem Inneren des Motorgehäuses und dem Getriebegehäuse vorgesehen werden muss.By the displacement of the bolt diameter of the mounting bolts for the stator radially outwardly on the one hand and the inversion of the screwing on the other hand in blind thread in the motor housing, it is possible on the one hand to expand the space between the stator and the motor housing radially outwards, so that There is more space for the electrical connections and, where appropriate, the arrangement of electrical components is given. By reversing the screwing can also account for the additional seal between the stator and the motor housing, since no through hole must be provided between the interior of the motor housing and the gear housing.
In einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass im Bereich der Schraubverbindungen zwischen dem Statorträger und dem Motorgehäuse jeweils eine radial nach außen vorspringende Verbindungslasche vorgesehen ist. Anstel- Ie eines durchlaufenden, radial nach außen ragenden Ringflansches erlauben einzelne Verbindungslaschen eine schlankere Ausführung des Getriebegehäuses, das dann beispielsweise im Bereich der Verbindungslaschen radiale Ausnehmungen aufweist.In a preferred embodiment of the invention it is provided that in the region of the screw connections between the stator and the motor housing each have a radially outwardly projecting connecting strap is provided. Instead of a continuous, radially outwardly projecting annular flange allow individual connecting straps a slimmer version of the transmission housing, which then has radial recesses, for example in the region of the connecting straps.
In der Regel ist das Getriebegehäuse mit dem Motorgehäuse mit zweiten Schrauben verschraubt, wobei im Falle von radialen Ausnehmungen des Getriebegehäuses liegenden Verbindungslaschen des Statorträgers die ersten Schrauben zum Befestigen des Statorträgers auf dem Umfang zwischen den zweiten Schrau- ben zum Befestigen des Getriebegehäuses angeordnet sind. Dadurch lässt sich ein im Durchmesser schlankes Getriebegehäuse erreichen, wobei auch der Flansch des Motorgehäuses entsprechend schlank ausgeführt werden kann.As a rule, the gear housing is screwed to the motor housing with second screws, wherein in the case of radial recesses of the gear housing lying connection straps of the stator support, the first screws for fixing the stator support on the circumference between the second screws for fastening the gear housing are arranged. As a result, a slim in diameter transmission housing can be achieved, whereby the flange of the motor housing can be made correspondingly slim.
So können beispielsweise die Lochkreisdurchmesser für beide Verschraubungen gleich oder wenigstens annähernd gleich sein, wobei ein gleicher Lochkreisdurchmesser die Fertigung der Sacklöcher im Motorgehäuse vereinfacht.Thus, for example, the pitch circle diameter for both screw connections may be the same or at least approximately the same, with an identical pitch circle diameter simplifying the manufacture of the blind holes in the motor housing.
Die Anzahl der ersten Schrauben kann gleich der Anzahl der zweiten Schrauben sein, wobei in einem solchen Fall über den Umfang gesehen abwechselnd erste und zweite Schrauben angeordnet sind, die Anzahl der ersten Schrauben kann aber auch kleiner sein, da, wie bereits ausführlich erwähnt, mit der Verschraubung der ersten Schrauben keine Abdichtung zwischen dem Statorträger und dem Motorgehäuse erreicht werden muss.The number of first screws may be equal to the number of second screws, in which case, seen alternately, first and second screws are arranged circumferentially, but the number of first screws may also be smaller since, as already mentioned in detail The screwing of the first screws no seal between the stator and the motor housing must be achieved.
Vorzugsweise kann zwischen dem Getriebegehäuse und dem Statorträger in an sich bekannter Weise ein Kühlmittelkanal an- geordnet sein, der durch Dichtungen abgedichtet ist, die gegen den Statorträger einerseits und das Getriebegehäuse anderseits unmittelbar abdichten. Ein solcher Kühlmittelkanal lässt sich bei der Herstellung der Gehäuseteile ohne großen Aufwand realisieren.Preferably, a coolant channel can be arranged between the gearbox housing and the stator carrier in a manner known per se, which is sealed by seals which, on the other hand, directly seal against the stator carrier on the one hand and the gearbox housing on the other hand. Such a coolant channel can be realized in the manufacture of the housing parts without much effort.
Nachfolgend wird anhand der beigefügten Zeichnungen näher auf eine Motor-/Getriebeeinheit nach dem Stand der Technik sowie auf eine Ausführungsform der Erfindung eingegangen. Es zeigen :Hereinafter, a motor / gear unit according to the prior art and an embodiment of the invention will be discussed in more detail with reference to the accompanying drawings. Show it :
Fig. 1 eine Schnittdarstellung einer Motor-/Getriebeein- heit mit integrierte Elektromaschine nach dem Stand der Technik;1 is a sectional view of a motor / Getriebeein- unit with integrated electric machine according to the prior art;
Fig. 2 eine Schnittdarstellung einer erfindungsgemäßen Mo- tor-/Getriebeeinheit . In Fig. 1 ist eine Motor-/Getriebeeinheit 100 nach dem Stand der Technik dargestellt, in die eine Elektromaschine 102 integriert ist. Derartige Anordnungen werden beispielsweise bei sogenannten Hybridfahrzeugen eingesetzt, bei welchen die Elektromaschine 102 einerseits in Bordbatterien gespeicherte elektrische Energie in Antriebsleistung umsetzt, andererseits im Schiebebetrieb aber auch in der Wirkung eines Generators elektrische Energie erzeugen kann, die dann in den Bordbatterien gespeichert wird. Bei einer besonders raumsparenden Lo- sung ist die Elektromaschine 102 innerhalb eines Getriebegehäuses 104 in den Antriebsstrang integriert, das an ein Motorgehäuse 106 angeflanscht ist. Um einen Stator 108 der Elektromaschine 102 zu zentrieren und zu befestigen, ist ein Statorträger 110 vorgesehen, der mithilfe von ersten Schrau- ben 112 mit dem Motorgehäuse 106 verschraubt ist. Die Schrauben 112 sind dabei von der Innenseite des Motorgehäuses 106 durch Durchgangsbohrungen 114 in der Stirnseite des Motorgehäuses geführt und in Sackbohrungen 116 mit Innengewinden eingeschraubt. Hierbei ist es notwendig, einerseits an der Flanschstelle zwischen dem Getriebegehäuse 104 und dem Motorgehäuse 106 eine erste Dichtfläche 118 auszubilden, um das Austreten von Getriebeöl zu verhindern, es ist aber auch notwendig, die Anlagefläche 120 zwischen dem Statorträger 110 und dem Motorgehäuse 106 um die Durchgangsbohrungen 114 abzu- dichten, um eine Durchtrittstelle zwischen dem Inneren des Motorgehäuses und dem Inneren des Getriebegehäuses 104 zu verhindern. Der Statorträger 110 verfügt über einen Ringflansch 122, in welchem die Sackbohrungen 116 angeordnet sind. Um die Schrauben von der Motorgehäuseseite her eindre- hen zu können, ist es dabei erforderlich, dass der Innendurchmesser des Ringflansches 122 kleiner als der Außendurchmesser des Stators 108 ist, was insoweit ungünstig ist, als dass die Stirnseite für die Bestromung der Statorwicklungen genutzt werden muss und gegebenenfalls auch elektrische Bau- elemente für die Ansteuerung der Elektromaschine 102 dort vorgesehen werden sollen. Üblich ist die Ausbildung eines Kühlmittelkanals 124 zwischen dem Statorträger 110 und dem Getriebegehäuse 104, wobei die Abdichtung mithilfe von Dichtelementen 126 unmittelbar zwischen diesen beiden Teilen erfolgt.Fig. 2 is a sectional view of a motor / gear unit according to the invention. In Fig. 1, a motor / gear unit 100 is shown in the prior art, in which an electric machine 102 is integrated. Such arrangements are used for example in so-called hybrid vehicles, in which the electric machine 102 converts stored electrical energy in drive power on the one hand in on-board batteries, on the other hand can generate electrical energy during coasting but also in the action of a generator, which is then stored in the on-board batteries. In a particularly space-saving solution, the electric machine 102 is integrated within a transmission housing 104 in the drive train, which is flanged to a motor housing 106. In order to center and fasten a stator 108 of the electric machine 102, a stator support 110 is provided, which is screwed to the motor housing 106 by means of first screws 112. The screws 112 are guided from the inside of the motor housing 106 through through holes 114 in the end face of the motor housing and screwed into blind holes 116 with internal threads. It is necessary, on the one hand at the flange between the gear housing 104 and the motor housing 106 to form a first sealing surface 118 to prevent the escape of gear oil, but it is also necessary, the contact surface 120 between the stator 110 and the motor housing 106 to the To seal through holes 114, to prevent a passage between the interior of the motor housing and the interior of the transmission case 104. The stator support 110 has an annular flange 122, in which the blind bores 116 are arranged. In order to be able to screw in the screws from the motor housing side, it is necessary that the inner diameter of the annular flange 122 is smaller than the outer diameter of the stator 108, which is unfavorable insofar as the end face has to be used to energize the stator windings and optionally also electrical components for the control of the electric machine 102 are to be provided there. Common is the formation of a coolant channel 124 between the stator 110 and the gear housing 104, wherein the sealing takes place by means of sealing elements 126 directly between these two parts.
Fig. 2 zeigt in gleicher Darstellung einen Schnitt durch eine erfindungsgemäße Motor-/Getriebeeinheit 10, in die wiederum eine Elektromaschine 12 integriert ist. Die Elektromaschine 12 ist wiederum innerhalb eines Getriebegehäuses 14 angeord- net, dass an ein Motorgehäuse 16 angeflanscht ist. Ein Stator 18 der Elektromaschine 12 ist mittels eines Statorträgers 20 gegen das Motorgehäuse 16 verschraubt. Im Unterschied zum Stand der Technik ist der Statorträger 20 mit radial nach außen vorspringenden Verbindungslaschen 32 ausgebildet, in wel- chen Durchgangsbohrungen 24 vorgesehen sind, durch welche erste Befestigungsschrauben 22 von der Getriebeseite her in Gewindesackbohrungen 26 in dem Motorgehäuse 16 eingeschraubt sind. Da Durchtrittsstellen zwischen dem Inneren des Motorgehäuses 16 und dem Getriebegehäuse 14 für die Verschraubung vollständig vermieden werden, entfällt die zweite Dichtfläche, d. h., die Flanschstelle zwischen dem Statorträger 20 und dem Motorgehäuse 16 bedarf keiner separaten Abdichtung. Es genügt daher eine einzige Dichtfläche 28 zwischen dem Getriebegehäuse 14 und dem Motorgehäuse 16, um die Einheit 10 vollständig nach außen und gegen einen Durchtritt von Flüssigkeiten zwischen den beiden Gehäuse abzudichten.Fig. 2 shows in the same representation a section through an inventive engine / transmission unit 10, in turn, an electric machine 12 is integrated. The electric machine 12 is in turn arranged within a transmission housing 14, which is flanged to a motor housing 16. A stator 18 of the electric machine 12 is screwed by means of a stator 20 against the motor housing 16. In contrast to the prior art, the stator carrier 20 is formed with radially outwardly projecting connecting straps 32, in which through holes 24 are provided, through which first fastening screws 22 are screwed from the transmission side in threaded sack holes 26 in the motor housing 16. Since passage points between the interior of the motor housing 16 and the gear housing 14 for the screw connection are completely avoided, eliminating the second sealing surface, d. h., The flange between the stator 20 and the motor housing 16 does not require a separate seal. Therefore, a single sealing surface 28 between the gear housing 14 and the motor housing 16 is sufficient to seal the unit 10 completely outward and against the passage of liquids between the two housings.
Wie gut zu erkennen ist, ist der Innendurchmesser des Statorträgers 20 auch im Bereich zwischen dem Stator 18 und dem Mo- torgehäuse 16 entsprechend dem Außendurchmessers des Stators 18 ausgeführt, so dass stirnseitig des Stators 18 Platz für die Anschlüsse der Statorwicklungen und gegebenenfalls weiterer Bauelemente vorhanden ist. Der Stator 18 kann auch näher an das Motorgehäuse 16 heranrücken, so dass bei gleichem axi- alem Baubedarf ein größerer Stator mit einer entsprechend höheren Leistung der Elektromaschine eingesetzt werden kann, oder, sofern dies gewünscht ist, bei gleich bleibender Leistung der axiale Bauraum reduziert werden kann.As can be clearly seen, the inner diameter of the stator carrier 20 is also embodied in the region between the stator 18 and the motor housing 16 in accordance with the outer diameter of the stator 18, so that there is space for the connections of the stator windings and possibly further components on the front side of the stator 18 is. The stator 18 can also move closer to the motor housing 16, so that a larger stator with a correspondingly higher output of the electric machine can be used with the same axial construction requirement, or, if desired, with constant power of the axial space can be reduced.
Die Verbindungslaschen 32 liegen im Bereich von radialen Aus- sparungen 30 in dem Getriebegehäuse 14, wobei die Flanschschrauben zur Befestigung des Getriebegehäuses 14 an dem Motorgehäuse 16 über den Umfang gesehen zwischen den Befestigungsschrauben 22 des Statorträgers 20 liegen. Die Anzahl der Befestigungsschrauben kann gegenüber der in Fig. 1 gezeigten Variante nach dem Stand der Technik erheblich reduziert werden, weil kein gleichmäßiger Anpressdruck zum Erreichen der Abdichtung mehr gegeben sein muss.The connecting straps 32 lie in the region of radial recesses 30 in the gearbox housing 14, the flange bolts for fastening the gearbox housing 14 to the motor housing 16 being situated over the circumference between the fastening screws 22 of the stator carrier 20. The number of fastening screws can be significantly reduced compared to the variant shown in Fig. 1 according to the prior art, because no uniform contact pressure to achieve the seal must be given more.
Konstruktiv praktisch unverändert ist bei der Motor-/Getrie- beeinheit 10 der Kühlmittelkanal 34, der wiederum durchStructurally virtually unchanged in the motor / transmission unit 10, the coolant channel 34, which in turn by
Dichtelemente 36 abgedichtet ist und durch das Getriebegehäuse 14 sowie den Statorträger 20 unmittelbar begrenzt ist. Sealing elements 36 is sealed and is directly limited by the gear housing 14 and the stator 20.

Claims

Patentansprüche claims
1. Motor-/Getriebeeinheit mit einer zwischen einem Verbrennungsmotor und einem Getriebe in den Antriebsstrang integ- rierten Elektromaschine (12), deren Stator (18) mittels eines innerhalb eines Getriebegehäuses (14) angeordneten Statorträgers (20) mit einem Gehäuse (16) am Verbrennungsmotor mit ersten Schrauben (22) verschraubt ist, d a d u r c h g e k e n n z e i c h n e t , dass der Statorträ- ger (20) wenigstens im Bereich der Verschraubungen (22) radial nach außen erweitert ist und die Schrauben (22) zum Verschrauben des Statorträgers (20) mit dem Motorgehäuse (16) in Sackgewinde (26) in dem Gehäuse (16) eingreifen.1. engine / transmission unit with an integrated between a combustion engine and a transmission in the drive train electric machine (12) whose stator (18) by means of a gear housing (14) arranged stator carrier (20) with a housing (16) on Internal combustion engine with first screws (22) is screwed, characterized in that the Statorträ- ger (20) at least in the region of the screw (22) is expanded radially outwardly and the screws (22) for screwing the stator (20) with the motor housing ( 16) engage in blind thread (26) in the housing (16).
2. Motor-/Getriebeeinheit nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass im Bereich der Schrauben (22) zum Verbinden des Statorträgers (20) mit dem Gehäuse (16) jeweils eine radial nach außen vorspringende Verbindungslasche (32) vorgesehen ist.2. engine / transmission unit according to claim 1, a d e r c h e c e n e c e s in that in the region of the screws (22) for connecting the stator support (20) with the housing (16) is provided in each case a radially outwardly projecting connecting strap (32).
3. Motor-/Getriebeeinheit nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dass das Getriebegehäuse (14) im Bereich der Verbindungslaschen (30) radiale Ausnehmungen (30) aufweist.3. Engine / transmission unit according to claim 2, characterized in that the gear housing (14) in the region of the connecting straps (30) has radial recesses (30).
4. Motor-/Getriebeeinheit nach Anspruch 3, d a d u r c h g e k e n n z e i c h n e t , dass das Getriebegehäuse (14) mit dem Gehäuse (16) mit zweiten Schrauben verschraubt ist und die ersten Schrauben (22) zum Befestigen des Sta- torträgers (20) auf dem Umfang zwischen den zweiten4. Engine / transmission unit according to claim 3, characterized in that the transmission housing (14) with the housing (16) is screwed with second screws and the first screws (22) for securing the stator girder (20) on the circumference between the second
Schrauben zum Befestigen des Getriebegehäuses (14) angeordnet sind.Screws for securing the gear housing (14) are arranged.
5. Motor-/Getriebeeinheit nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , dass der Lochkreisdurchmesser für beide Verschraubungen gleich ist. 5. Engine / transmission unit according to claim 4, characterized in that the pitch circle diameter is the same for both screwings.
6. Motor-/Getriebeeinheit nach Anspruch 4 oder 5, d a d u r c h g e k e n n z e i c h n e t , dass die Anzahl der ersten Schrauben (22) gleich oder kleiner als die Anzahl der zweiten Schrauben ist.6. The engine / transmission unit according to claim 4 or 5, wherein a number of the first bolts is equal to or smaller than the number of the second bolts.
7. Motor-/Getriebeeinheit nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass der Innendurchmesser des Statorträgers (20) im Bereich zwischen dem Stator (20) und dem Gehäuse (16) wenigstens gleich dem Außendurchmesser des Stators (18) oder größer ist.7. Motor / gear unit according to one of the preceding claims, characterized in that the inner diameter of the stator (20) in the region between the stator (20) and the housing (16) at least equal to the outer diameter of the stator (18) or greater.
8. Motor-/Getriebeeinheit nach einem der vorhergehenden Ansprüchen, d a d u r c h g e k e n n z e i c h n e t , dass zwischen dem Getriebegehäuse (14) und dem Statorträger8. engine / transmission unit according to one of the preceding claims, d a d u r c h e c e n e z e i c h e n e, that between the gear housing (14) and the stator
(20) ein Kühlmittelkanal (34) ausgebildet ist, der durch Dichtungen (36) abgedichtet ist, die gegen den Statorträger (20) einerseits und das Getriebegehäuse (14) andererseits unmittelbar abdichten. (20) a coolant channel (34) is formed which is sealed by seals (36) which seal against the stator (20) on the one hand and the transmission housing (14) on the other hand directly.
PCT/EP2009/055998 2008-05-28 2009-05-18 Engine/transmission unit with electric machine WO2009144149A1 (en)

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JP2012061912A (en) * 2010-09-15 2012-03-29 Aisin Seiki Co Ltd Drive apparatus for hybrid vehicle and case
US8783393B2 (en) 2011-02-25 2014-07-22 Deere & Company Interface for a motor and drive assembly
DE102018122509A1 (en) * 2018-09-14 2020-03-19 Voith Patent Gmbh Electric motor housing for a hybrid drive train
DE102021112973A1 (en) 2021-05-19 2022-11-24 Audi Aktiengesellschaft Driving device for a vehicle axle

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US5427196A (en) * 1992-07-08 1995-06-27 Kabushikikaisha Equos Research Electric motor drive system
US20040173393A1 (en) * 1998-09-09 2004-09-09 Laszlo Man Power train for use in motor vehicles and the like
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