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WO2022194321A1 - Use of a wrap-spring clutch for transmitting torque between electrical machines in a hybrid transmission - Google Patents

Use of a wrap-spring clutch for transmitting torque between electrical machines in a hybrid transmission Download PDF

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Publication number
WO2022194321A1
WO2022194321A1 PCT/DE2022/100137 DE2022100137W WO2022194321A1 WO 2022194321 A1 WO2022194321 A1 WO 2022194321A1 DE 2022100137 W DE2022100137 W DE 2022100137W WO 2022194321 A1 WO2022194321 A1 WO 2022194321A1
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WO
WIPO (PCT)
Prior art keywords
drive shaft
hybrid transmission
electric machine
clutch
rotor
Prior art date
Application number
PCT/DE2022/100137
Other languages
German (de)
French (fr)
Inventor
Denis OPARIN
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN202290000336.6U priority Critical patent/CN221393030U/en
Publication of WO2022194321A1 publication Critical patent/WO2022194321A1/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
    • B60K6/22—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
    • B60K6/38—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 driveline clutches
    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
    • 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
    • B60K6/44—Series-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
    • B60K6/42—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
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
    • 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 invention relates to a hybrid transmission, for example in the manner of a DHT/dedicated hybrid transmission, a twin drive or a multi-mode unit, with a first drive shaft, which is assigned to a first electric machine and a second drive shaft, which is assigned to a second electric machine. wherein a clutch is provided for connecting the first drive shaft and the second drive shaft in a torque-transmitting manner.
  • Electric machines can also be referred to here as e-machines and can be used as generators or electric motors.
  • Hybrid vehicles in particular plug-in hybrid vehicles, combine locally emission-free driving with low fuel consumption in hybrid operation and a high degree of driving pleasure.
  • the battery ca- capacity and, with increasing performance, the electrical output will continue to increase. This results in new challenges in terms of installation space integration and the overall design of such drive trains. Due to the high costs of the electrical components, there is still a need to use all possibilities for technical simplification.
  • Dedicated hybrid transmissions can be derived from known transmission concepts, i.e. double-clutch transmissions, converter planetary transmissions, continuously variable transmissions (CVT) or automated manual transmissions.
  • the electrical machine becomes part of the transmission, and it can be connected to various transmission shafts.
  • one or more power-split operating states can also be generated in combination with a planetary gear.
  • a transmission for a motor vehicle with at least one drive shaft, via which a torque can be transmitted, with a first intermediate shaft and a second intermediate shaft being placed between the drive shaft and an output shaft for torque dissipation, depending on a switching position of coupling elements in the torque ment (s) flow are involved that the torque is guided via the first intermediate shaft and / or the second intermediate shaft, wherein the coupling elements in the torque (s) transmission gears with the drive shaft of the first intermediate shaft, the second intermediate shaft and / or the Connect output shaft, and wherein the gears are arranged in three axially spaced wheel planes.
  • Electric motors as such are known from US Pat. No. 10,128,705 B2 or the European counterpart, namely EP 3,465,889 B1. These usually have a Ge housing, a stator which has stator windings coupled to the housing, a rotor which has a rotor shaft and rotor windings, at least two main rotor bearings which couple the rotor shaft to the housing, with at least two main rotor bearings, a first have electrical resistance between the rotor shaft and the housing; and having a rotor discharge bearing coupling the rotor shaft to the housing, the rotor discharge bearing having a second electrical resistance between the rotor shaft and the housing, the second electrical resistance being less than the first electrical resistance to conducting a rotor discharge through the rotor discharge bearing.
  • a rotor main bearing of the at least two rotor main loaders has a first load; and the rotor discharge bearing has a second load that is greater than the first load, whereby a lubricant film separating the moving components of the rotor discharge bearing has a smaller thickness than a lubricant film separating the moving components from the stationary components of the rotor main bearing is.
  • wet clutches are usually used in hybrid transmissions in order to connect a first drive shaft to a second drive shaft, each associated with an electric machine.
  • this regularly causes high axial forces and also requires them for adjustment.
  • a rather cumbersome actuation unit is required, which must also provide pressure. All of this usually entails additional installation space. This is undesirable.
  • DE 10 2009 054 672 A1 deals with roll stabilization and uses a belt clutch.
  • a device for the roll stabilization of a vehicle is disclosed.
  • a wrap-around clutch is used.
  • a device is disclosed with a stabilizer designed at least in some areas as a torsion bar, which is connected on both sides via stabilizer arms to wheel guides of a wheel axle of the vehicle.
  • At least one locking device is provided, with which at least one area of the stabilizer can be at least partially locked in relation to a body of the vehicle, the locking device being designed as a wrap-around clutch.
  • the belt clutch is used instead of a wet clutch.
  • the unit is accommodated under/in the rotor of the electric machine to save space.
  • the actuation can B. with means of a friction device, such as a friction cone, are implemented. This results in very low axial forces and the actuation unit can also be electrically operated.
  • the wrap-around clutch connects a traction machine, i.e.
  • the belt clutch is actuated, for example, with the help of a sliding sleeve and a friction cone.
  • the sliding sleeve for example, is actuated axially with the aid of an actuator.
  • the belt clutch is arranged radially and preferably axially within a rotor of the first electric machine and surrounds the second drive shaft.
  • the overall structure is particularly space-saving when the wrap-around clutch is arranged radially and preferably axially within both rotors of the first electric machine and the second electric machine.
  • An advantageous embodiment is also characterized in that the first drive shaft is connected to an internal combustion engine in a specific operating state.
  • An advantageous embodiment is also characterized in that in one operating state a differential gear is connected to the second drive shaft in a torque-transmitting manner.
  • a sliding sleeve which is arranged and dimensioned in such a way that when the actuating unit is activated, it causes the second drive shaft to be increasingly held in place by a spring, with the spring being switchably fixed/fixable with the connected to the first drive shaft / can be connected.
  • the spring is permanently connected to the second drive shaft, with increasing torsion of the spring, i.e. an increasingly smaller winding, leading to the spring resting more firmly on the outer surface of the second drive shaft, which means that greater torques can be transmitted.
  • Strip springs or wire springs have proven themselves as springs. Lower actuation forces and space-saving rotor integration are therefore possible.
  • a rotor with a cross interference fit on a larger diameter is desirable.
  • the sliding sleeve is designed for displacing a friction element, such as a friction cone, towards a counter friction element, preferably at an end of the spring on the sliding sleeve side, in which case the counter friction element is attached to the spring or from her being trained.
  • a friction element such as a friction cone
  • the invention also relates to a drive train with a hybrid transmission according to the invention, with a first electric machine, a second electric machine, an internal combustion engine and/or a differential gear being present, preferably all of these components.
  • a variety of shafts and torque transmission wheels are used.
  • Fig. 1 is a schematic layout sketch of a hybrid transmission according to the invention
  • Fig. 2 is a longitudinal section through the belt clutch, as in the embodiment from Fig. 1 is used, and
  • Fig. 3 is an isometric view of the belt clutch from Fig. 2,
  • a first drive shaft 2 is assigned to a first electric machine/electric machine 3 .
  • An internal combustion engine is identified by the reference number 19 .
  • a clutch 6 which is designed as a belt clutch 7 .
  • the wrap-around clutch is actuated via an actuating unit 8 .
  • the actuating unit 8 has a sliding sleeve 9.
  • the sliding sleeve 9 is displaced axially by an actuator 10.
  • the belt clutch 7 has a spring 11 .
  • the spring 11 is connected to the second drive shaft 4 at a first end 12 .
  • At the second end 13 of the spring 11 there is a counter-friction element 14 .
  • the counter-friction element 14 has a conical outer surface.
  • the sliding sleeve 9 has a coupling point 16 for actuation by means of the actuator 10 .
  • the coupling point 16 can be embodied as a groove, gutter, groove, trough, hole, blind hole, through hole.
  • the spring 11 is arranged radially and axially within a rotor 17 of the first electric machine 3 .
  • the second electric machine 5 unlike the first electric machine 3, is not designed as an internal rotor but as an external rotor, so that the relevant rotor 18 is arranged entirely outside of the radially and axially nested electric motor package.
  • a differential gear 21 is used to derive the torque. In recuperation mode or when starting the internal combustion engine 19 via one of the electric machines 5 and/or 3, the torque curve is also vice versa to the normal torque curve described in detail above. This is also desired.
  • Hybrid transmission reference sign list first drive shaft first electric machine/first electric machine second drive shaft second electric machine/second electric machine clutch belt clutch actuation unit sliding sleeve actuator spring first end of the spring second end of the spring counter-friction element friction surface coupling point rotor of the first electric machine rotor of the second electric machine internal combustion engine Friction element / friction cone differential gear

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a hybrid transmission (1) comprising a first drive shaft (2) which is associated with a first electrical machine (3), and a second drive shaft (4) which is associated with a second electrical machine (5), wherein a clutch (6) is provided for torque-transmittingly connecting the first drive shaft (2) to the second drive shaft (4), and the clutch (6) is in the form of a wrap-spring clutch (7). The invention also relates to a drive train having a hybrid transmission (1), with a first electrical machine (3), a second electrical machine (5), an internal combustion engine (19) and/or a differential (21) being provided.

Description

Einsatz einer Umschlingungskupplung für Momentübertraqunq zwischen E-Maschinen in einem Hvbridqetriebe Use of a wrap-around clutch for torque transmission between e-machines in a hybrid transmission
Die Erfindung betrifft ein Hybridgetriebe, etwa nach Art eines DHT / dedizierten Hyb ridgetriebes, eines TwinDrives bzw. eines MultiMode-Aggregats, mit einer ersten An triebswelle, welche einer ersten Elektromaschine zugeordnet ist und einer zweiten An triebswelle, welche einer zweiten Elektromaschine zugeordnet ist, wobei eine Kupp lung zum drehmomentweitergebenen Verbinden der ersten Antriebswelle und der zweiten Antriebswelle vorgesehen ist. Elektromaschinen können hier auch als E-Ma- schinen bezeichnet werden und sind als Generatoren oder Elektromotoren nutzbar. The invention relates to a hybrid transmission, for example in the manner of a DHT/dedicated hybrid transmission, a twin drive or a multi-mode unit, with a first drive shaft, which is assigned to a first electric machine and a second drive shaft, which is assigned to a second electric machine. wherein a clutch is provided for connecting the first drive shaft and the second drive shaft in a torque-transmitting manner. Electric machines can also be referred to here as e-machines and can be used as generators or electric motors.
Viele Hersteller entwickeln derzeit so genannte Multimode DHTs. Diese weisen zum Teil nur einen (einzigen) Gang im parallelen Betrieb für eine Verbrennungskraftma schine auf. Es ist ein gewisser Trend erkennbar, DHTs zur Verfügung zu stellen, die (wenigstens / genau) zwei Gänge bei Betrieb der Verbrennungskraftmaschine aufwei sen. Üblicherweise gibt es eine eigene Antriebswelle für die Verbrennungskraftma schine, auf der dann auch der Rotor einer ersten E-Maschine angebunden ist. Da häufig eine zweite Elektromaschine eingesetzt ist, weist diese auch im Stand der Technik eine zu der genannten Antriebswelle parallele / achsparallele weitere Welle auf. Dazu werden zusätzliche ebenfalls zu beiden Antriebswellen achsparallele Zwi schen- und Zusatzwellen eingesetzt. Dies ist allerdings relativ aufwändig. Es kann zwar ein Gang für die zweite Elektromaschine genutzt werden und zwei Gänge für die erste Elektromaschine und die Verbrennungskraftmaschine, doch weist ein solches Getriebe leider relativ viele Gangstufen auf, was kostenintensiv ist. Hier ist es wün schenswert eine Verbesserung zu bewirken. Gerade bei Hybridgetrieben ist so eine Verbesserung wünschenswert. Many manufacturers are currently developing so-called multimode DHTs. Some of these have only one (single) gear in parallel operation for an internal combustion engine. There is a certain trend towards making DHTs available that have (at least/precisely) two gears when the internal combustion engine is in operation. There is usually a separate drive shaft for the internal combustion engine, to which the rotor of a first electric machine is then connected. Since a second electric machine is often used, this also in the prior art has a further shaft which is parallel/axially parallel to the named drive shaft. For this purpose, intermediate and additional shafts, which are also axis-parallel to both drive shafts, are used. However, this is relatively complex. Although one gear can be used for the second electric machine and two gears for the first electric machine and the internal combustion engine, such a transmission unfortunately has a relatively large number of gears, which is expensive. It is desirable to bring about an improvement here. Such an improvement is particularly desirable for hybrid transmissions.
Hybridfahrzeuge, insbesondere Plug-in-Hybridfahrzeuge, verbinden lokal emissions freies Fahren mit geringem Verbrauch im Hybridbetrieb und einem hohen Maß an Fahrspaß. Zudem werden durch strengere gesetzliche Anforderungen die Batterieka- pazität und mit steigender Performance die elektrische Leistung weiter steigen. Dar aus resultieren neue Herausforderungen hinsichtlich der Bauraumintegration und der Gesamtauslegung solcher Antriebstränge. Durch die hohen Kosten der elektrischen Komponenten entsteht weiterhin die Notwendigkeit, alle Möglichkeiten zur techni schen Vereinfachung zu nutzen. Hybrid vehicles, in particular plug-in hybrid vehicles, combine locally emission-free driving with low fuel consumption in hybrid operation and a high degree of driving pleasure. In addition, due to stricter legal requirements, the battery ca- capacity and, with increasing performance, the electrical output will continue to increase. This results in new challenges in terms of installation space integration and the overall design of such drive trains. Due to the high costs of the electrical components, there is still a need to use all possibilities for technical simplification.
Die insgesamt noch relativ niedrigen Stückzahlen für Hybridfahrzeuge haben dazu ge führt, dass bislang der elektrische Antrieb vorrangig in P2-Anordnung zwischen Ver brennungsmotor und Getriebe angeordnet wurde, wobei die klassischen Triebstrang komponenten weitgehend unverändert gelassen wurden. Steigende Stückzahlerwar tungen führen dazu, dass zunehmend die Optimierung des Gesamtsystems in den Vordergrund rückt. Dazu gehört auch die Möglichkeit, den mechanischen Getriebeteil zu vereinfachen, etwa durch Entfall des Rückwärtsgangs, und stattdessen mindestens eine in das Getriebe integrierte elektrische Maschine zu nutzen, um den vollen Funkti onsumfang darzustellen. Solche Getriebekonzepte werden als dedizierte Hybridge triebe oder Dedicated Hybrid Transmissions (DHT) bezeichnet. The overall still relatively low numbers of hybrid vehicles have meant that the electric drive has so far been arranged primarily in a P2 arrangement between the combustion engine and the transmission, with the classic drive train components being left largely unchanged. Increasing quantities are expected, which means that the optimization of the overall system is becoming increasingly important. This also includes the possibility of simplifying the mechanical part of the transmission, for example by eliminating the reverse gear, and instead using at least one electric machine integrated in the transmission in order to provide the full range of functions. Such transmission concepts are referred to as dedicated hybrid transmissions or dedicated hybrid transmissions (DHT).
Dedizierte Hybridgetriebe können aus bekannten Getriebekonzepten hervorgehen, also aus Doppelkupplungsgetrieben, Wandler-Planetengetrieben, stufenlosen Getrie ben (CVT) oder automatisierten Schaltgetrieben. Die elektrische Maschine wird dabei zum Teil des Getriebes, wobei ihre Anbindung auf verschiedenen Getriebewellen er folgen kann. Neben den parallelen (oder seriellen) Hybridmodi können in Kombination mit einem Planetengetriebe auch eine oder mehrere leistungsverzweigte Betriebszu stände erzeugt werden. Dedicated hybrid transmissions can be derived from known transmission concepts, i.e. double-clutch transmissions, converter planetary transmissions, continuously variable transmissions (CVT) or automated manual transmissions. The electrical machine becomes part of the transmission, and it can be connected to various transmission shafts. In addition to the parallel (or serial) hybrid modes, one or more power-split operating states can also be generated in combination with a planetary gear.
Diesbezüglich bekannte Varianten finden sich beispielsweise auf der im Internet abruf baren Seite https://schaeffler-events.com/kolloquium/lecture/h6/index.html auf der eine Veröffentlichung zum Kolloquium der Anmelderin aus dem Jahre 2018 publiziert ist. Aus dem Stand der Technik ist auch bspw. ein Hybridgetriebe nach Art eines DHT be kannt, bspw. aus der DE 10 2019 130 882 B3. Dort ist ein Schaltgetriebe für ein Kraft fahrzeug mit zumindest einer Antriebswelle offenbart, über welche Drehmoment ein leitbar ist, wobei zwischen der Antriebswelle und einer zur Drehmomentausleitung ein gesetzten Abtriebswelle eine erste Zwischenwelle und eine zweite Zwischenwelle in Abhängigkeit einer Schaltstellung von Koppelelementen so in den Drehmo- ment(en)fluss eingebunden sind, dass das Drehmoment über die erste Zwischenwelle und/oder die zweite Zwischenwelle geführt ist, wobei die Koppelelemente bei der Drehmoment(en)übertragung Zahnräder mit der Antriebswelle der ersten Zwischen welle, der zweiten Zwischenwelle und/oder der Abtriebswelle verbinden, und wobei die Zahnräder in drei voneinander axial beabstandeten Radebenen angeordnet sind. Known variants in this regard can be found, for example, on the website https://schaeffler-events.com/kolloquium/lecture/h6/index.html, on which a publication on the applicant’s colloquium from 2018 is published. A hybrid transmission of the DHT type, for example, is also known from the prior art, for example from DE 10 2019 130 882 B3. There, a transmission for a motor vehicle is disclosed with at least one drive shaft, via which a torque can be transmitted, with a first intermediate shaft and a second intermediate shaft being placed between the drive shaft and an output shaft for torque dissipation, depending on a switching position of coupling elements in the torque ment (s) flow are involved that the torque is guided via the first intermediate shaft and / or the second intermediate shaft, wherein the coupling elements in the torque (s) transmission gears with the drive shaft of the first intermediate shaft, the second intermediate shaft and / or the Connect output shaft, and wherein the gears are arranged in three axially spaced wheel planes.
Antriebsvorrichtungen für Kraftfahrzeuge sind auf diesem Gebiet auch aus der DE 10 2019 131 754 B3 bekannt. Drive devices for motor vehicles are also known in this field from DE 10 2019 131 754 B3.
Es befinden sich viele Multimode DHT in der Entwicklung. Diese ermöglichen einen seriellen, parallelen sowie einen elektrischen Betrieb. Es hat sich jedoch gezeigt, dass im rein elektrischen Betrieb der Wirkungsgrad noch zu erhöhen ist. Dabei soll auch Verschleiß vermindert werden und sich auf den Verbrauch negativ auswirkende Träg heitsmomente berücksichtigt werden. There are many multimode DHT under development. These enable serial, parallel and electrical operation. However, it has been shown that the efficiency can still be increased in purely electrical operation. Wear should also be reduced and moments of inertia that have a negative impact on consumption should be taken into account.
Aus der US 10 128 705 B2 bzw. dem europäischen Pendant, nämlich der EP 3 465 889 B1 sind Elektromotoren als solches bekannt. Diese weisen üblicherweise ein Ge häuse auf, einen Stator, der mit dem Gehäuse gekoppelte Statorwicklungen aufweist, einen Rotor, der eine Rotorwelle und Rotorwicklungen aufweist, mindestens zwei Ro torhauptlager, die die Rotorwelle mit dem Gehäuse koppeln, wobei sie mindestens zwei Rotorhauptlager, einen ersten elektrischen Widerstand zwischen der Rotorwelle und dem Gehäuse aufweisen; und ein Rotorentladungslager besitzen, das die Rotor welle mit dem Gehäuse koppelt, wobei das Rotorentladungslager einen zweiten elektrischen Widerstand zwischen der Rotorwelle und dem Gehäuse aufweist, wobei der zweite elektrische Widerstand kleiner als der erste elektrische Widerstand ist, um eine Rotorentladung durch das Rotorentladungslager zu leiten. Besonders ist in die sem europäischen Patent, dass ein Rotorhauptlager der mindestens zwei Rotorhaupt lader eine erste Last aufweist; und das Rotorentladungslager eine zweite Last auf weist, die größer als die erste Last ist, wodurch ein Schmiermittelfilm der die bewegli chen Komponenten des Rotorentladungslagers trennt, eine geringere Dicke als ein Schmiermittelfilm, der die beweglichen Komponenten von den stationären Komponen ten des Rotorhauptlagers trennt, vorhanden ist. Electric motors as such are known from US Pat. No. 10,128,705 B2 or the European counterpart, namely EP 3,465,889 B1. These usually have a Ge housing, a stator which has stator windings coupled to the housing, a rotor which has a rotor shaft and rotor windings, at least two main rotor bearings which couple the rotor shaft to the housing, with at least two main rotor bearings, a first have electrical resistance between the rotor shaft and the housing; and having a rotor discharge bearing coupling the rotor shaft to the housing, the rotor discharge bearing having a second electrical resistance between the rotor shaft and the housing, the second electrical resistance being less than the first electrical resistance to conducting a rotor discharge through the rotor discharge bearing. What is special in this European patent is that a rotor main bearing of the at least two rotor main loaders has a first load; and the rotor discharge bearing has a second load that is greater than the first load, whereby a lubricant film separating the moving components of the rotor discharge bearing has a smaller thickness than a lubricant film separating the moving components from the stationary components of the rotor main bearing is.
Üblicherweise werden bei Hybridgetrieben nasse Kupplungen eingesetzt, um eine erste Antriebswelle mit einer zweiten Antriebswelle, die jeweils einer Elektromaschine zugeordnet sind, zu verbinden. Dies ruft jedoch regelmäßig hohe axiale Kräfte hervor und benötigt diese auch zur Verstellung. Ferner wird eine recht umständliche Betäti gungseinheit benötigt, die auch Druck bereitstellen muss. All dies zieht üblicherweise zusätzlichen Bauraum nach sich. Das ist ungewünscht. Wet clutches are usually used in hybrid transmissions in order to connect a first drive shaft to a second drive shaft, each associated with an electric machine. However, this regularly causes high axial forces and also requires them for adjustment. Furthermore, a rather cumbersome actuation unit is required, which must also provide pressure. All of this usually entails additional installation space. This is undesirable.
Es ist die Aufgabe der vorliegenden Erfindung die aus dem Stand der Technik be kannten Nachteile zu vermeiden oder sogar abzustellen. It is the object of the present invention to avoid or even eliminate the disadvantages known from the prior art.
Bei einem gattungsgemäßen Hybridgetriebe wird dies erfindungsgemäß dadurch ge löst, dass die Kupplung als Umschlingungskupplung ausgebildet ist. In a generic hybrid transmission, this is solved according to the invention in that the clutch is designed as a belt clutch.
Auf völlig anderem technischen Gebiet gibt es schon Umschlingungskupplungen. So beschäftigt sich die DE 10 2009 054 672 A1 mit einer Wankstabilisierung und nutzt dabei eine Umschlingungskupplung. In dieser Druckschrift ist eine Vorrichtung zur Wankstabilisierung eines Fahrzeuges offenbart. Dabei ist eine Umschlingungskupp lung eingesetzt. In diesem abseitigen Stand der Technik ist eine Vorrichtung offenbart, mit einem zumindest bereichsweise als Torsionsstab ausgebildeten Stabilisator, der auf seinen beiden Seiten über Stabilisatorarme mit Radführungen einer Radachse des Fahrzeugs verbunden ist. Dabei ist mindestens eine Feststelleinrichtung vorgesehen, mit welcher zumindest ein Bereich des Stabilisators in Bezug auf eine Karosserie des Fahrzeugs zumindest teilweise arretierbar ist, wobei die Feststelleinrichtung als Um schlingungskupplung ausgebildet ist. Durch den überraschenden Einsatz einer Umschlingungskupplung in der vorliegenden Hybridgetriebe-Anwendung kann nun glücklicherweise eine platzsparende Lösung mit geringen Betätigungs- und Axialkräften vorgestellt werden. Durch die sehr kompakte Anordnung der zwei Elektromaschinen / E-Maschinen übereinander / ineinander ist es auch möglich eine rotorintegrierte Lösung zu stellen. Die Umschlingungskupplung wird anstelle einer nassen Kupplung eingesetzt. Dabei wird die Einheit platzsparend unter/ in dem dem Rotor der Elektromaschine untergebracht. Die Betätigung kann z. B. mit tels einer Reibvorrichtung, wie eines Reibkonus, umgesetzt werden. Dadurch entste hen sehr geringe Axialkräfte und die Betätigungseinheit kann auch elektrisch ausge führt werden. Die Umschlingungskupplung verbindet eine Traktionsmaschine, also eine zweite Elektromaschine / E-Maschine, mit einer ersten Elektromaschine / E-Ma- schine, die als Generator fungiert, sowie einer Verbrennungskraftmaschine derart, dass alle Betriebspunkte und Fahrsituationen vom Getriebe abgedeckt werden kön nen. Die Betätigung der Umschlingungskupplung wird bspw. mit Hilfe einer Schie bemuffe und eines Reibkonus umgesetzt. Die Schiebemuffe bspw. wird mit Hilfe eines Aktuators axial betätigt. In a completely different technical field, there are already belt clutches. DE 10 2009 054 672 A1 deals with roll stabilization and uses a belt clutch. In this document, a device for the roll stabilization of a vehicle is disclosed. In this case, a wrap-around clutch is used. In this isolated prior art, a device is disclosed with a stabilizer designed at least in some areas as a torsion bar, which is connected on both sides via stabilizer arms to wheel guides of a wheel axle of the vehicle. At least one locking device is provided, with which at least one area of the stabilizer can be at least partially locked in relation to a body of the vehicle, the locking device being designed as a wrap-around clutch. Thanks to the surprising use of a belt clutch in the present hybrid transmission application, a space-saving solution with low actuation and axial forces can now fortunately be presented. Due to the very compact arrangement of the two electric machines / electric machines one above the other / one inside the other, it is also possible to provide a rotor-integrated solution. The belt clutch is used instead of a wet clutch. The unit is accommodated under/in the rotor of the electric machine to save space. The actuation can B. with means of a friction device, such as a friction cone, are implemented. This results in very low axial forces and the actuation unit can also be electrically operated. The wrap-around clutch connects a traction machine, i.e. a second electric machine/e-machine, with a first electric machine/e-machine, which acts as a generator, and an internal combustion engine in such a way that all operating points and driving situations can be covered by the transmission. The belt clutch is actuated, for example, with the help of a sliding sleeve and a friction cone. The sliding sleeve, for example, is actuated axially with the aid of an actuator.
Vorteilhafte Ausführungsformen sind in den Unteransprüchen beansprucht und wer den nachfolgend näher erläutert. Advantageous embodiments are claimed in the dependent claims and who explained in more detail below.
So ist es von Vorteil, wenn die Umschlingungskupplung radial und vorzugsweise axial innerhalb eines Rotors der ersten Elektromaschine angeordnet ist und die zweite An triebswelle umgibt. It is advantageous if the belt clutch is arranged radially and preferably axially within a rotor of the first electric machine and surrounds the second drive shaft.
Dabei hat es sich bewährt, wenn die zweite Antriebswelle konzentrisch zur und inner halb von der ersten Antriebswelle angeordnet ist. Eine platzsparende Anordnung der beiden Elektromaschinen ist dann möglich. It has proven itself when the second drive shaft is arranged concentrically to and within half of the first drive shaft. A space-saving arrangement of the two electric machines is then possible.
Besonders platzsparend wird der Gesamtaufbau dann, wenn die Umschlingungskupp lung radial und vorzugsweise axial innerhalb beider Rotoren der ersten Elektroma schine und der zweiten Elektromaschine angeordnet ist. Eine vorteilhafte Ausführungsform ist auch dadurch gekennzeichnet, dass die erste Antriebswelle in einem bestimmten Betriebszustand mit einer Verbrennungskraftma schine verbunden ist. The overall structure is particularly space-saving when the wrap-around clutch is arranged radially and preferably axially within both rotors of the first electric machine and the second electric machine. An advantageous embodiment is also characterized in that the first drive shaft is connected to an internal combustion engine in a specific operating state.
Eine vorteilhafte Ausführungsform ist auch dadurch gekennzeichnet, dass in einem Betriebszustand ein Differentialgetriebe drehmomentübertragend an die zweite An triebswelle angeschlossen ist. An advantageous embodiment is also characterized in that in one operating state a differential gear is connected to the second drive shaft in a torque-transmitting manner.
Unterschiedliche Aktoren lassen sich einsetzen, wenn eine Betätigungseinheit der Umschlingungskupplung zugeordnet ist, die mechanischer oder elektrischer Natur ist. Different actuators can be used if an actuating unit, which is of a mechanical or electrical nature, is assigned to the belt clutch.
So ist es in diesem Zusammenhang von Vorteil, wenn eine Schiebemuffe vorhanden ist, welche so angeordnet und bemessen ist, dass sie bei Aktivierung der Betätigungs einheit ein zunehmendes Festhalten der zweiten Antriebswelle durch eine Feder be wirkt, wobei die Feder schaltbar fest / festlegbar mit der ersten Antriebswelle verbun den / verbindbar ist. Die Feder ist dabei dauerhaft fest mit der zweiten Antriebswelle verbunden, wobei eine zunehmende Verwindung der Feder, d.h. eine zunehmend kleiner werdende Wicklung, zu einer festeren Anlage der Feder an der Außenoberflä che der zweiten Antriebswelle führt, wodurch größere Drehmomente übertragen wer den können. Als Federn haben sich Bandfedern oder Drahtfedern bewährt. Geringere Betätigungskräfte und eine platzsparende Rotorintegration sind dadurch möglich. Ein Rotor mit einem Querpressverband auf einem größeren Durchmesser ist wünschens wert. In this context, it is advantageous if a sliding sleeve is present, which is arranged and dimensioned in such a way that when the actuating unit is activated, it causes the second drive shaft to be increasingly held in place by a spring, with the spring being switchably fixed/fixable with the connected to the first drive shaft / can be connected. The spring is permanently connected to the second drive shaft, with increasing torsion of the spring, i.e. an increasingly smaller winding, leading to the spring resting more firmly on the outer surface of the second drive shaft, which means that greater torques can be transmitted. Strip springs or wire springs have proven themselves as springs. Lower actuation forces and space-saving rotor integration are therefore possible. A rotor with a cross interference fit on a larger diameter is desirable.
Im Detail ist es von Vorteil, wenn die Schiebemuffe zum Verlagern eines Reibelemen tes, wie eines Reibkonus ausgelegt ist, und zwar auf ein Gegenreibelement zu, vor zugsweise an einem schiebemuffenseitigen Ende der Feder, wobei dann das Gegen reibelement an der Feder angebracht ist oder von ihr ausgebildet wird. In detail, it is advantageous if the sliding sleeve is designed for displacing a friction element, such as a friction cone, towards a counter friction element, preferably at an end of the spring on the sliding sleeve side, in which case the counter friction element is attached to the spring or from her being trained.
Es hat sich bewährt, wenn die Schiebemuffe verschieblich aber drehfest, etwa über eine Verzahnung, an der ersten Antriebswelle angebunden ist. Die Erfindung betrifft auch einen Antriebsstrang mit einem erfindungsgemäßen Hyb ridgetriebe, wobei eine erste Elektromaschine, eine zweite Elektromaschine, eine Ver brennungskraftmaschine und/oder ein Differentialgetriebe vorhanden ist, vorzugs weise all diese Bestandteile. Darüber hinaus sind eine Vielzahl von Wellen und Dreh momentübertragungsrädern einzusetzen. It has proven useful if the sliding sleeve is connected to the first drive shaft in a displaceable but non-rotatable manner, for example via a tooth system. The invention also relates to a drive train with a hybrid transmission according to the invention, with a first electric machine, a second electric machine, an internal combustion engine and/or a differential gear being present, preferably all of these components. In addition, a variety of shafts and torque transmission wheels are used.
Die Erfindung wird nachfolgend mit Hilfe einer Zeichnung näher erläutert. Dabei wird eine erste Ausführungsform eines erfindungsgemäßen Hybridgetriebes beschrieben. Es zeigen: The invention is explained in more detail below with the aid of a drawing. A first embodiment of a hybrid transmission according to the invention is described. Show it:
Fig. 1 eine schematische Layout-Skizze eines erfindungsgemäßen Hybridgetrie bes, Fig. 1 is a schematic layout sketch of a hybrid transmission according to the invention,
Fig. 2 einen Längsschnitt durch die Umschlingungskupplung, wie es in der Aus führungsform nach Fig. 1 eingesetzt ist, und Fig. 2 is a longitudinal section through the belt clutch, as in the embodiment from Fig. 1 is used, and
Fig. 3 eine isometrische Ansicht auf die Umschlingungskupplung aus Fig. 2, Fig. 3 is an isometric view of the belt clutch from Fig. 2,
Die Figuren sind lediglich schematischer Natur und dienen nur dem Verständnis der Erfindung. Die gleichen Elemente sind mit denselben Bezugszeichen versehen. The figures are only of a schematic nature and serve only to understand the invention. The same elements are provided with the same reference numbers.
In Fig. 1 ist eine erste Ausführungsform eines erfindungsgemäßen Hybridgetriebes 1 dargestellt. Es ist eine erste Antriebswelle 2 einer ersten Elektromaschine / E-Ma- schine 3 zugeordnet. Es gibt auch eine zweite Antriebswelle 4, die einer zweiten Elektromaschine / zweiten E-Maschine 5 zugeordnet ist. Eine Verbrennungskraftma schine ist mit dem Bezugszeichen 19 gekennzeichnet. 1 shows a first embodiment of a hybrid transmission 1 according to the invention. A first drive shaft 2 is assigned to a first electric machine/electric machine 3 . There is also a second drive shaft 4 associated with a second electric machine/machine 5 . An internal combustion engine is identified by the reference number 19 .
Es gibt eine Kupplung 6, die als Umschlingungskupplung 7 ausgebildet ist. Die Um schlingungskupplung wird über eine Betätigungseinheit 8 betätigt. Die Betätigungsein heit 8 besitzt eine Schiebemuffe 9. Die Schiebemuffe 9 wird von einem Aktuator 10 axial verlagert. Wie besonders in der Fig. 2 gut zu erkennen ist, weist die Umschlingungskupplung 7 eine Feder 11 auf. Die Feder 11 ist an einem ersten Ende 12 an der zweiten Antriebs welle 4 angebunden. Am zweiten Ende 13 der Feder 11 ist ein Gegenreibelement 14 vorhanden. Das Gegenreibelement 14 weist eine konische Außenfläche auf. Auf diese konische Außenfläche kann bei Bewegung der Schiebemuffe 9 eine Reibfläche 15 ei nes Reibelements / Reibkonus 20 zu bewegt werden. Bei Kontakt der beiden Flächen wird Reibung hervorgerufen, die zu einer zunehmenden Verwindung der Feder 11 führt, mit der Folge, dass (mehr) Drehmoment von der ersten Antriebswelle 2 auf die zweite Antriebswelle 4 übertragbar ist. Für die Aktuierung mittels des Aktuators 10 weist die Schiebemuffe 9 eine Koppelstelle 16 auf. Die Koppelstelle 16 kann als Nut, Rinne, Rille, Mulde, Loch, Sackloch, Durchgangsloch ausgestaltet sein. There is a clutch 6 which is designed as a belt clutch 7 . The wrap-around clutch is actuated via an actuating unit 8 . The actuating unit 8 has a sliding sleeve 9. The sliding sleeve 9 is displaced axially by an actuator 10. As can be seen particularly well in FIG. 2 , the belt clutch 7 has a spring 11 . The spring 11 is connected to the second drive shaft 4 at a first end 12 . At the second end 13 of the spring 11 there is a counter-friction element 14 . The counter-friction element 14 has a conical outer surface. When the sliding sleeve 9 moves, a friction surface 15 of a friction element/friction cone 20 can be moved toward this conical outer surface. When the two surfaces come into contact, friction is caused, which leads to an increasing twisting of the spring 11, with the result that (more) torque can be transmitted from the first drive shaft 2 to the second drive shaft 4. The sliding sleeve 9 has a coupling point 16 for actuation by means of the actuator 10 . The coupling point 16 can be embodied as a groove, gutter, groove, trough, hole, blind hole, through hole.
Die Feder 11 ist radial und axial innerhalb eines Rotors 17 der ersten Elektromaschine 3 angeordnet. The spring 11 is arranged radially and axially within a rotor 17 of the first electric machine 3 .
Unter Rückgriff auf Fig. 1 sei erläutert, dass die zweite Elektromaschine 5, anders als die erste Elektromaschine 3 nicht als Innenläufer, sondern als Außenläufer ausgebil det ist, so dass der diesbezügliche Rotor 18 ganz außerhalb des radial und axial ge schachtelten Elektromotorenpaketes angeordnet ist. Ein Differentialgetriebe 21 wird zum Ausleiten des Drehmoments eingesetzt. Im Rekuperationsbetrieb oder beim Star ten der Verbrennungskraftmaschine 19 über eine der Elektromaschinen 5 und/oder 3 ist der Drehmomentenverlauf auch vice versa zum vorab ausführlich beschriebenen normalen Drehmomentenverlauf. Dies ist auch so gewünscht. Referring to FIG. 1, it should be explained that the second electric machine 5, unlike the first electric machine 3, is not designed as an internal rotor but as an external rotor, so that the relevant rotor 18 is arranged entirely outside of the radially and axially nested electric motor package. A differential gear 21 is used to derive the torque. In recuperation mode or when starting the internal combustion engine 19 via one of the electric machines 5 and/or 3, the torque curve is also vice versa to the normal torque curve described in detail above. This is also desired.
Die Fig. 3 dient vor allem zum Visualisieren der Bandartigkeit der Feder 11 . Bezuqszeichenliste Hybridgetriebe erste Antriebswelle erste E-Maschine / erste Elektromaschine zweite Antriebswelle zweite E-Maschine / zweite Elektromaschine Kupplung Umschlingungskupplung Betätigungseinheit Schiebemuffe Aktuator Feder erstes Ende der Feder zweites Ende der Feder Gegenreibelement Reibfläche Koppelstelle Rotor der ersten E-Maschine Rotor der zweiten E-Maschine Verbrennungskraftmaschine Reibelement / Reibkonus Differentialgetriebe 3 serves primarily to visualize the band-like nature of the spring 11 . Hybrid transmission reference sign list first drive shaft first electric machine/first electric machine second drive shaft second electric machine/second electric machine clutch belt clutch actuation unit sliding sleeve actuator spring first end of the spring second end of the spring counter-friction element friction surface coupling point rotor of the first electric machine rotor of the second electric machine internal combustion engine Friction element / friction cone differential gear

Claims

Ansprüche Expectations
1. Hybridgetriebe (1 ) mit einer ersten Antriebswelle (2), welche einer ersten Elektro- maschine (3) zugeordnet ist und mit einer zweiten Antriebswelle (4), welche ei ner zweiten Elektromaschine (5) zugeordnet ist, wobei eine Kupplung (6) zum drehmomentweitergebenen Verbinden der ersten Antriebswelle (2) mit der zwei ten Antriebswelle (4) vorgesehen ist, dadurch gekennzeichnet, dass die Kupp lung (6) als Umschlingungskupplung (7) ausgebildet ist. 1. Hybrid transmission (1) with a first drive shaft (2), which is assigned to a first electric machine (3) and with a second drive shaft (4), which is assigned to a second electric machine (5), with a clutch (6th ) is provided for torque-transmitting connection of the first drive shaft (2) to the second drive shaft (4), characterized in that the clutch (6) is designed as a belt clutch (7).
2. Hybridgetriebe (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass die Um schlingungskupplung (7) radial innerhalb eines Rotors (17) der ersten Elektroma schine (3) angeordnet ist und die zweite Antriebswelle (4) umgibt. 2. Hybrid transmission (1) according to claim 1, characterized in that the wrap-around clutch (7) is arranged radially within a rotor (17) of the first electric machine (3) and surrounds the second drive shaft (4).
3. Hybridgetriebe (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die zweite Antriebswelle (4) konzentrisch zu und innerhalb von der ersten Antriebs welle (2) angeordnet ist. 3. Hybrid transmission (1) according to claim 1 or 2, characterized in that the second drive shaft (4) is arranged concentrically to and within the first drive shaft (2).
4. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Umschlingungskupplung (7) radial innerhalb beider Rotoren (17, 18) der ersten Elektromaschine (3) und der zweiten Elektromaschine (5) angeordnet ist. 4. Hybrid transmission (1) according to one of claims 1 to 3, characterized in that the belt clutch (7) is arranged radially inside both rotors (17, 18) of the first electric machine (3) and the second electric machine (5).
5. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die erste Antriebswelle (2) in einem Betriebszustand mit einer Verbren nungskraftmaschine (19) verbunden ist. 5. Hybrid transmission (1) according to one of claims 1 to 4, characterized in that the first drive shaft (2) is connected in an operating state with a combustion engine (19).
6. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass in einem Betriebszustand ein Differentialgetriebe (21) drehmomentübertra gend an die zweite Antriebswelle (4) angeschlossen ist. 6. Hybrid transmission (1) according to one of claims 1 to 5, characterized in that in one operating state a differential gear (21) is connected to the second drive shaft (4) in a torque-transmitting manner.
7. Hybridgetriebe (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Betätigungseinheit (8) der Umschlingungskupplung (7) zugeordnet ist, die mechanischer oder elektrischer Natur ist. 7. Hybrid transmission (1) according to any one of claims 1 to 6, characterized in that an actuating unit (8) is associated with the belt clutch (7), which is mechanical or electrical in nature.
8. Hybridgetriebe (1) nach Anspruch 7, dadurch gekennzeichnet, dass eine Schie bemuffe (9) vorhanden ist, welche so angeordnet und bemessen ist, dass sie bei Aktivierung der Betätigungseinheit (8) ein zunehmendes Festhalten der zweiten Antriebswelle (4) durch eine Feder (11) bewirkt. 8. Hybrid transmission (1) according to claim 7, characterized in that a sliding sleeve (9) is present, which is arranged and dimensioned such that upon activation of the actuating unit (8) an increasing detention of the second drive shaft (4) by a Spring (11) causes.
9. Hybridgetriebe (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Schie bemuffe (9) zum Verlagern eines Reibelementes (20) auf ein Gegenreibelement (14) an der Feder (11 ) ausgelegt ist. 9. Hybrid transmission (1) according to claim 8, characterized in that the sliding sleeve (9) for shifting a friction element (20) to a counter-friction element (14) on the spring (11) is designed.
10. Antriebsstrang mit einem Hybridgetriebe (1) nach einem der vorhergehenden An sprüche, wobei eine erste Elektromaschine (3) eine zweite Elektromaschine (5), eine Verbrennungskraftmaschine (19) und/oder ein Differentialgetriebe (21) vor handen ist. 10. Drive train with a hybrid transmission (1) according to one of the preceding claims, wherein a first electric machine (3), a second electric machine (5), an internal combustion engine (19) and/or a differential gear (21) is present.
PCT/DE2022/100137 2021-03-18 2022-02-21 Use of a wrap-spring clutch for transmitting torque between electrical machines in a hybrid transmission WO2022194321A1 (en)

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EP0003465B1 (en) 1978-01-30 1982-12-15 Fernand Le Coent Composite frame applicable to doors and windows in buildings or the like
WO1998050709A1 (en) * 1997-05-07 1998-11-12 Litens Automotive Partnership Serpentine drive system with improved over-running alternator decoupler
DE102009054672A1 (en) 2009-12-15 2011-06-16 Robert Bosch Gmbh Device for roll stabilization of vehicle, has locking devices provided for partially locking region of stabilizer with respect to body of vehicle and designed as looping clutches, where stabilizer is section-wise formed as torsion bar
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