WO2021013456A1 - Unité d'entraînement électrique pour un véhicule à moteur au moins en partie électrifié - Google Patents

Unité d'entraînement électrique pour un véhicule à moteur au moins en partie électrifié Download PDF

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Publication number
WO2021013456A1
WO2021013456A1 PCT/EP2020/067691 EP2020067691W WO2021013456A1 WO 2021013456 A1 WO2021013456 A1 WO 2021013456A1 EP 2020067691 W EP2020067691 W EP 2020067691W WO 2021013456 A1 WO2021013456 A1 WO 2021013456A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
differential
gear
drive unit
electrical machine
Prior art date
Application number
PCT/EP2020/067691
Other languages
German (de)
English (en)
Inventor
Bernhard Steiner
Clemens Ortmayr
Original Assignee
Magna powertrain gmbh & 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 Magna powertrain gmbh & co kg filed Critical Magna powertrain gmbh & co kg
Publication of WO2021013456A1 publication Critical patent/WO2021013456A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/62—Gearings having three or more central gears
    • F16H3/66—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another
    • F16H3/663—Gearings having three or more central gears composed of a number of gear trains without drive passing from one train to another with conveying rotary motion between axially spaced orbital gears, e.g. RAVIGNEAUX
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0806—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts
    • F16H37/0813—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft
    • F16H37/082—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with a plurality of driving or driven shafts with only one input shaft and additional planetary reduction gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/70—Gearings
    • B60Y2400/73—Planetary gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/102—Shaft arrangements; Shaft supports, e.g. bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2097—Transmissions using gears with orbital motion comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing

Definitions

  • Electric drive unit for an at least partially
  • the present invention relates to an electric drive unit for an at least partially electrified motor vehicle comprising an electric machine, a differential gear, a reduction gear, the electrical machine being operatively connected or connectable to the differential gear via the reduction gear and a bearing arrangement with at least two bearings
  • Electric drive arrangements for an at least partially electrified motor vehicle often have an electric machine, a one- or two-stage reduction gear and a differential gear. Furthermore, a decoupling device can be provided for the optional drive connection of electrical machine and differential gear. The electric machine is driven via the reduction gear with the differential gear connected or connectable. With a given installation space and a fixed diameter of the electric machine, the maximum possible torque of the electric drive unit is specified by the active length of the electric machine and the translation of the reduction gear.
  • an electric drive unit for an at least partially electrified motor vehicle comprising an electric machine, a differential gear, the differential gear being essentially coaxial with respect to an axis of rotation of the electric machine and having a differential cage Reduction gear, the reduction gear being designed as a planetary gear with a planetary gear carrier, as well as a bearing arrangement with at least a first bearing and a second bearing, wherein the electric machine is drivingly connected or connectable to the differential gear via the reduction gear, the differential cage of the differential gear being fixed is connected to the planet carrier of the reduction gear, the first bearing and the second bearing are arranged on the rotor shaft and the rotor shaft, the planetary gear, via the first bearing and the second bearing carrier of the reduction gear and thus also the differential cage are mounted.
  • the electric drive unit has an electric machine, a reduction gear, a differential gear and a bearing arrangement.
  • the electric machine can be operated as a generator or as a motor.
  • the reduction gear is designed according to the present invention as a Pla netenrad gear and has a planet carrier.
  • the differential gear has a differential carrier. According to the invention, the differential gear is also arranged essentially coaxially with respect to an axis of rotation of the electrical machine.
  • the bearing arrangement has at least two bearings, namely a first bearing and a second bearing.
  • the electric machine is connected or can be connected to the differential gear so as to drive it via the reduction gear.
  • the differential carrier of the differential gear is firmly connected to the planet carrier of the reduction gear.
  • a “fixed connection” can be understood to mean, in addition to common methods of connecting components such as screws, gluing, welding, clipping, etc., also a one-piece design of the two components differential cage and planetary gear carrier.
  • the first bearing and the second bearing are arranged on the rotor shaft.
  • the first camp and the second camp are corresponding to the present invention, the rotor shaft, the planet carrier and thus also the differential carrier is supported.
  • the electrical machine preferably has a rotor and a stator, the rotor being fixed, i.e. axially fixed and non-rotatable, arranged on a rotor shaft and being rotatable about the central axis of rotation.
  • the stator has an end winding on each of its end faces.
  • the first bearing of the bearing arrangement is arranged in an axial direction at the level of the end winding of the electrical machine facing the differential gear.
  • the direction indication “axial” describes a direction essentially along or parallel to the axis of rotation of the electrical machine.
  • the direction indication “radial” describes a direction essentially normal to the axis of rotation of the electrical machine.
  • the first bearing and the second bearing are preferably designed as floating bearings.
  • the first bearing and the second bearing are preferably leads out as needle bearings. However, they can also be designed as another common bearing.
  • the electrical machine is in direct contact with a coolant, at least during operation, ie the electrical machine is designed as a “wet” electrical machine.
  • Active cooling in particular of the end windings, can increase the continuous torque or continuous output of the electrical machine.
  • Due to the inventive design of the electric drive unit in particular due to its double use as a bearing for the rotor shaft, the planet wheel carrier and thus also for the differential cage, an optimized installation space with regard to the active length of the electric machine can be made available for the electric machine and thus a torque and power increase of the electric drive unit can be achieved.
  • Another advantageous aspect of this is the targeted placement of the first bearing.
  • the electric drive unit has a high degree of integration due to the nested structure and thus the optimal use of installation space. Through the double use of the first bearing and the second bearing, components can also be saved and thus a cost-reduced electric drive unit can be produced.
  • Fig. Shows a schematic representation of an electrical drive unit to
  • FIG. 1 An electric drive unit 1 according to the present inven tion is shown schematically.
  • the electric drive unit 1 is suitable for this to be installed in an at least partially electrified motor vehicle, i.e. in an electric or hybrid vehicle.
  • the electric drive unit 1 has an electric machine 2, a reduction gear 9 and a differential gear 11.
  • the electric machine 2 is connected to the differential gear 11 in a driving manner via the reduction gear 9.
  • the electrical machine 2 and the differential gear 11 are also arranged essentially coaxially with respect to an axis of rotation 3.
  • the electrical machine 2 comprises a rotor 5 and a stator 6.
  • the rotor 5 is fixed, i.e. axially fixed and rotationally fixed, on a rotor shaft 4.
  • the rotor shaft 4 and thus the rotor 5 are rotatable about the axis of rotation 3.
  • the stator 6 surrounds the rotor 5 on the outside and has a plurality of stator windings (not shown) which are electrically connected to the end faces 14, 15 of the stator 6 in the form of a winding head 7, 8 each. That is, a first end winding 7 is implemented on a first end face 14 of the stator 6 and a second end winding 8 is implemented on a second end face 15 of the stator 6.
  • the first end winding 7 represents an end winding 7 of the electrical machine 2 facing the differential gear 11.
  • the reduction gear 9 is designed as a planetary gear, the planetary gear having a sun gear 16, a double planetary gear 17 and a planetary gear carrier 10 carrying the double planetary gear 17.
  • the double planetary gear 17 has a first planet gear 17 ‘and a second planet gear 17, the first planet gear 17‘ with the sun gear 16 and the second planet gear 17 with a toothing in a housing 25 in the rotary handle.
  • the sun gear 16 is fixedly connected to the rotor shaft 4 of the electrical machine 2.
  • the differential gear 11 has a differential cage 12 which is firmly connected to the planetary gear carrier 10 of the reduction gear 9.
  • the differential carrier 12 of the differential gear 1 1 is thus driven via the planet carrier 10.
  • the differential gear comprises four differential bevel gears 19 rotatably mounted on a pin 18.
  • the differential bevel gears 19 are not connected to one another in a torque-relevant connection, but they are in a torque-relevant connection with output bevel gears 20.
  • the Abrete gelzier 20 are each firmly connected to an output shaft 21.
  • the electric drive unit 1 has a bearing arrangement with four bearings, namely a first bearing 13, a second bearing 22, a third bearing 23 and a fourth bearing 24.
  • the first bearing 13 and the second bearing 22 are each designed as floating bearings.
  • the third bearing 23 and the fourth bearing 24 are each designed as a fixed bearing.
  • the first bearing 13 is arranged in an axial direction, namely a direction along the axis of rotation 3 of the rotor 5, exactly at the level of the first end winding 7 of the stator 6 on the rotor shaft 4.
  • the Ro gate shaft 4 of the electrical machine 2 the planet carrier 10 of the reduction gear 9 and thus also the differential cage 12 of the differential gear 1 1 are mounted.
  • the rotor shaft 4 is also supported via the third bearing 23, where the third bearing 23 in the embodiment of the present invention shown in FIG. could also be omitted, since the rotor shaft 4 is centered under load via the planet gears 17 ', 17 " .
  • the second bearing 22 serves as a support bearing between the rotor shaft 4 and the differential carrier 12.
  • the second bearing 22 is also net angeord on the rotor shaft 4.
  • the rotor shaft 4 of the electrical Ma machine 2 the planetary gear carrier 10 of the reduction gear 9 and thus also the differential cage 12 of the differential gear 1 1 are mounted.
  • the first bearing 13 and the second bearing 22 are each manufactured det as needle bearings.
  • a needle roller bearing is a roller bearing in which between an inner ring (not shown) and an outer ring (not shown), in contrast to the lubrication in plain bearings, rolling bodies reduce the frictional resistance.
  • the planetary gear carrier 10 and the differential carrier 12 are each mounted on the outer ring of the two bearings 13, 22; the rotor shaft 4 is mounted on the inner ring of the two bearings 13, 22.

Landscapes

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

Abstract

La présente invention concerne une unité d'entraînement électrique (1) pour un véhicule à moteur au moins en partie électrifié, équipé d'une machine électrique (2), d'un différentiel (11), le différentiel (11) étant disposé par rapport à un axe de rotation (3) de la machine électrique (2) de manière sensiblement coaxiale à celui-ci et comprenant une cage (12), d'un démultiplicateur (9), le démultiplicateur (9) étant exécuté en tant que train planétaire avec un porte-satellites (10), ainsi que d'un ensemble palier avec au moins un premier palier (13) et un second palier (22). La machine électrique (2) est reliée ou peut être reliée par le biais du démultiplicateur (9) au différentiel (11) avec action d'entraînement, la cage (12) du différentiel (11) étant reliée à demeure au porte-satellites (10) du démultiplicateur (9). Le premier palier (13) et le second palier (22) sont disposés sur l'arbre de rotor (4), et l'arbre de rotor (4), le porte-satellites (10) et ainsi également la cage (12) sont montés par le biais du premier palier (13) et du second palier (22).
PCT/EP2020/067691 2019-07-19 2020-06-24 Unité d'entraînement électrique pour un véhicule à moteur au moins en partie électrifié WO2021013456A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019210778.8 2019-07-19
DE102019210778.8A DE102019210778A1 (de) 2019-07-19 2019-07-19 Elektrische Antriebseinheit für ein zumindest teilweise elektrifiziertes Kraftfahrzeug

Publications (1)

Publication Number Publication Date
WO2021013456A1 true WO2021013456A1 (fr) 2021-01-28

Family

ID=71170584

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/067691 WO2021013456A1 (fr) 2019-07-19 2020-06-24 Unité d'entraînement électrique pour un véhicule à moteur au moins en partie électrifié

Country Status (2)

Country Link
DE (1) DE102019210778A1 (fr)
WO (1) WO2021013456A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021205164A1 (de) * 2021-05-20 2022-11-24 Zf Friedrichshafen Ag Elektrischer Antrieb für ein Fahrzeug
DE102022202910A1 (de) 2022-03-24 2023-09-28 Zf Friedrichshafen Ag Antriebsvorrichtung für ein Fahrzeug
DE102022110036A1 (de) 2022-04-26 2023-10-26 Schaeffler Technologies AG & Co. KG Elektrisch betreibbarer Achsantriebsstrang

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426221A1 (fr) * 2002-12-05 2004-06-09 Nissan Motor Co., Ltd. Moteur d'entraínement integré pour véhicules
DE102004026039A1 (de) * 2004-05-27 2005-12-15 Linde Ag Antriebsachse mit einem durch den Elektromotor eines Fahrantriebs antreibbaren Arbeitsantrieb
DE102011080036A1 (de) * 2011-07-28 2013-01-31 Zf Friedrichshafen Ag Radnahe Antriebseinheit für ein Kraftfahrzeug
DE102013016441A1 (de) * 2013-09-27 2015-04-02 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zum Antrieb eines Fahrzeuges

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4815187B2 (ja) * 2005-10-25 2011-11-16 本田技研工業株式会社 車両の動力伝達装置
JP5290217B2 (ja) * 2010-02-25 2013-09-18 トヨタ自動車株式会社 車両用動力伝達装置
DE102011100816A1 (de) * 2011-05-06 2012-11-08 Audi Ag Antriebsanordnung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426221A1 (fr) * 2002-12-05 2004-06-09 Nissan Motor Co., Ltd. Moteur d'entraínement integré pour véhicules
DE102004026039A1 (de) * 2004-05-27 2005-12-15 Linde Ag Antriebsachse mit einem durch den Elektromotor eines Fahrantriebs antreibbaren Arbeitsantrieb
DE102011080036A1 (de) * 2011-07-28 2013-01-31 Zf Friedrichshafen Ag Radnahe Antriebseinheit für ein Kraftfahrzeug
DE102013016441A1 (de) * 2013-09-27 2015-04-02 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zum Antrieb eines Fahrzeuges

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