WO2012139820A2 - Dispositif d'entraînement comportant un ensemble rotor pouvant être refroidi - Google Patents

Dispositif d'entraînement comportant un ensemble rotor pouvant être refroidi Download PDF

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Publication number
WO2012139820A2
WO2012139820A2 PCT/EP2012/053705 EP2012053705W WO2012139820A2 WO 2012139820 A2 WO2012139820 A2 WO 2012139820A2 EP 2012053705 W EP2012053705 W EP 2012053705W WO 2012139820 A2 WO2012139820 A2 WO 2012139820A2
Authority
WO
WIPO (PCT)
Prior art keywords
drive device
rotor assembly
rotor
bearing
rotation
Prior art date
Application number
PCT/EP2012/053705
Other languages
German (de)
English (en)
Other versions
WO2012139820A3 (fr
Inventor
Tomas Smetana
Norbert Radinger
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
Publication of WO2012139820A2 publication Critical patent/WO2012139820A2/fr
Publication of WO2012139820A3 publication Critical patent/WO2012139820A3/fr

Links

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
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
    • 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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F16H57/0483—Axle or inter-axle differentials
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • 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
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

Definitions

  • the invention relates to a drive device with a rotor assembly, which is associated with an electric motor and designed for rotation about an axis of rotation.
  • Electric motors are used more and more often for the drive of vehicles and have therefore prevailed as an alternative to the internal combustion engines.
  • the electric motors serve to apply a driving torque to wheels of a common axle of a vehicle and thereby drive the vehicle.
  • a corresponding device is disclosed in the document DE19841 159C2, which relates to a drive arrangement for a motor vehicle.
  • DE4321772C2 which is probably the closest prior art, shows a drive for a vehicle, in which a rotor of an electric motor transmits its rotation via the rotor shaft to a transmission arranged in a transmission housing with a clutch engageable via a differential gear, which two, having the front and rear wheels of the motor vehicle, drive shafts driving output shafts.
  • One of the output shafts is rotatably mounted in the rotor shaft designed as a hollow shaft by means of a needle bearing.
  • the bearings for the rotor shaft are supplied with lubricant by a splash lubrication.
  • the invention has for its object to provide a drive device, in particular for a vehicle, which has an improved rotor assembly.
  • the drive device is particularly suitable and / or designed for a vehicle, in particular for generating a drive torque or an overlay torque to a drive torque for the vehicle.
  • the drive device comprises a rotor arrangement, which is associated with an electric motor, wherein the electric motor is optionally also included in the drive device.
  • a stator is arranged, which is in operative connection with the rotor assembly or can be brought, so that the stator and rotor assembly together generate a torque.
  • the rotor assembly is designed as an internal rotor. More specifically, the rotor assembly may include a rotor, in particular a sheet-packaged rotor, and a rotor shaft, which are rotatably coupled together. In operation, the rotor assembly rotates about an axis of rotation.
  • the rotor assembly has at least one axially extending channel portion, which is designed to pass a fluid for cooling the rotor assembly.
  • the at least one channel section is arranged in the rotor shaft.
  • axial running means that an inlet opening of the channel section and an outlet opening of the channel section are arranged offset from one another in the axial direction relative to the axis of rotation.
  • the at least one channel section arranged parallel to the axis of rotation.
  • the at least one channel section is arranged off-center and / or offset relative to the axis of rotation.
  • the rotation axis is not arranged in the channel section.
  • the rotor shaft may be formed as a solid shaft, but it is preferred that a hollow shaft space is arranged coaxially and concentrically with the rotor arrangement, which is designed to receive at least one shaft.
  • a hollow shaft space is arranged coaxially and concentrically with the rotor arrangement, which is designed to receive at least one shaft.
  • more than one shaft can also be arranged in the hollow shaft space.
  • the at least one channel section is then provided in addition, in particular separately from the hollow shaft space.
  • the invention is based on the consideration, by the arrangement of the at least one channel section in the rotor assembly, in particular in the rotor shaft, on the one hand to achieve a reduction in the mass of the rotor assembly and thereby to improve the performance of the electric motor. On the other hand, it is achieved by the at least one channel section that the rotor arrangement itself and in particular independently of the remaining electric motor, in particular independently of the stator, can be effectively or selectively cooled by flowing through with the fluid.
  • the drive device comprises a cooling system, which is designed, the stator z. B. by water or other fluid having a cooling temperature of less than 80 degrees, preferably less than 70 degrees and in particular less than 55 degrees to cool.
  • a cooling temperature of less than 80 degrees, preferably less than 70 degrees and in particular less than 55 degrees to cool.
  • the at least one extending channel section would be feared that the rotor assembly could assume temperatures greater than the cooling temperature, which could lead to a strain in the drive device and thus to increased bearing friction, a bearing warming and to a further increase in the temperature of the rotor assembly.
  • the temperature of the rotor assembly in operation preferably maintained at the level of the cooling temperature of the stator or at least a disadvantageous increase in the temperature can be prevented.
  • the fluid is designed as a lubricant, in particular as a transmission oil.
  • a transmission oil present in the drive device for lubrication purposes can additionally be advantageously used as a coolant.
  • the rotor arrangement has a plurality of channel sections, which are particularly preferably distributed regularly in the direction of rotation about the axis of rotation. By a regular distribution in the direction of rotation an imbalance of the rotor assembly is avoided. By using a plurality of channel sections, a cooling of the rotor arrangement that is uniform in the direction of rotation can also be implemented.
  • the at least one channel section, some of the channel sections or all of the channel sections are preferably open on both sides in the axial direction.
  • the channel sections are formed as passage openings in the axial direction or parallel to the axis of rotation, in particular as longitudinal bores or cooling bores.
  • the drive device comprises a bearing arrangement for mounting the rotor arrangement, wherein the bearing assembly comprises at least two bearing means, which are arranged spaced from each other.
  • the lubricant is guided in the cooling of the rotor assembly so that the bearing means are contacted with the lubricant contacting or rinsed to cool the storage facilities directly with the Schmiersoff.
  • the at least one channel section is arranged in the axial direction between the bearing devices.
  • one or both bearing devices are each formed as at least one rolling bearing, in particular as at least one ball bearing.
  • the at least one channel section some or all of the channel sections are arranged in axial projection overlapping or aligned with the bearing devices.
  • a compact design is achieved in the axial direction. Due to the overlapping or aligned arrangement, a compact design of the cooled rotor assembly is implemented independently of this, even in the radial direction.
  • the rotor arrangement in particular the rotor shaft, is non-rotatably coupled to the outer ring (s) of the bearing device or devices.
  • This realization is based on previously known designs, since the known designs usually provide a coupling of the inner rings with the rotor assembly.
  • the inner rings of the storage facilities are preferably coupled to a motor housing or a motor shield of the electric motor or the drive device and / or mounted fixed to the housing or stationary in the drive device.
  • a free space In a particularly preferred embodiment of the invention provided between the inner ring of the bearing device and the rotor assembly, in particular the rotor shaft, a free space.
  • the clearance may be shaped like an annular disk, but in other embodiments may also be wedge-shaped, segmented in the direction of rotation, or take any other desired shape.
  • the free space allows a fluidic connection between the hollow shaft space or - optionally - its imaginary axial extension and the at least one channel section, some channel sections or all channel sections.
  • the fluid can be transported from the hollow shaft space via the free space in the at least one channel section.
  • the drive device comprises the at least one shaft in the hollow shaft space, wherein between the at least one shaft and the rotor assembly at least one annular gap portion is formed, which in turn is preferably fluidically coupled via the free space with the at least one channel section.
  • the rotor arrangement on the surface facing the hollow shaft space or the at least one shaft on its outer side has a conveying structure, which in a relative movement between the shaft and the rotor assembly, in particular the rotor shaft, the fluid active in a flow direction promotes.
  • the conveyor structure may be configured as a helical line revolving around the axis of rotation and may be realized as an elevation (e.g., a land) or a depression (e.g., a groove).
  • the drive device is designed so that the fluid from a first annular gap portion over the space between a first of the bearing devices and the rotor assembly through the at least one channel section over the space between a second of the bearing devices in a second annular gap section becomes. By passing the fluid through the at least one channel section cools the rotor assembly.
  • the drive device is designed as an electrical axle for a vehicle.
  • the drive device comprises a gear and / or a differential, which or which is particularly preferably designed as a planetary gear, in particular as a spur gear.
  • the transmission oil is often present as a fluid in the form of a splash lubrication for the transmission, so that the existing fluid can be used advantageously for cooling the rotor assembly.
  • a hybrid transmission for a vehicle which has at least two, preferably different motors, such as an electric motor and an internal combustion engine, for generating a drive torque for a vehicle.
  • a transmission oil is usually provided, which in turn can be used to cool the rotor assembly.
  • the electric motor, rotor or rotor shaft and possibly transmission section are arranged coaxially.
  • Figure 1 is a schematic longitudinal section through an electrical
  • FIG. 2 shows a detail enlargement from FIG. 1.
  • the Electric axle 1 comprises two power take-off axles 2 a, 2 b designed as plug-in axles, which transmit a drive torque, which is generated by an electric motor 3, to the wheels of a vehicle. Further, the electric axis 1 comprises a planetary gear 4, which generates a conversion, in particular ratio or reduction, of the drive torque generated by the electric motor 3 and the drive torque via a differential section 5 to the drives 2 a, b leads. Electric motor 3, outputs 2 a, b, planetary gear 4 and differential portion 5 are arranged coaxially with each other, so that the electrical axis 1 is formed as a very compact module.
  • the drive torque is transmitted via a rotor 6 to a rotor shaft 7 which is non-rotatably coupled to a sun shaft 8.
  • the sun shaft 8 leads the drive torque to a first sun gear 9, which meshes with planetary gears in the planetary gear 4.
  • the drive torque is guided to the differential portion 5, which transmits the converted drive torque via a second and a third sun gear 10 a, b to the outputs 2 a, b.
  • rotor shaft 7, sun shaft 8 and first sun gear 9 are arranged coaxially and / or concentrically with each other.
  • the planetary gear 4 is designed as a two-speed gearbox, which can be switched between two conversion states via a shift fork 1 1 and an engagement bearing 1 2. Switching takes place via an actuator motor 13.
  • the electrical axis 1 is lubricated by gear oil, which is provided as a splash lubrication.
  • FIG. 2 shows the electrical axis 1 in the same view, but in detail magnification and also with partially graphically suppressed components.
  • the rotor shaft 7 is mounted on a bearing, which includes two storage facilities 14 a, b.
  • the storage facilities 14 a, b are formed as two preloaded angular contact ball bearings in an O arrangement, so that the rotor shaft 7 is mounted without play.
  • the rotor shaft 7 is arranged on the outer rings of the bearing devices 14a, b, whereas the inner rings of the bearing devices 14a, b are arranged fixed to the housing.
  • the left bearing device 14a is seated with the inner ring on a portion of the housing 15, the right bearing device 14b is supported with its inner ring on an engine plate 16 from.
  • the rotor shaft 7 has coaxially and concentrically with its axis of rotation 17 a hollow shaft space 18 which - as shown in the preceding figure - for receiving the stub axles (shafts for the output) 2 a, b and for receiving the sun shaft 8 is formed.
  • the rotor shaft 7 is stepped in the radial direction shown in the longitudinal section shown, wherein a radially outer portion 19, the Au OWringe the bearing means 14 a, b receives or rotatably coupled with these and a radially inner region lying as a cooling region 20 in the axial direction is reduced by the width of the bearing means 14 a, b.
  • regularly distributed cooling bores 21 are introduced in the direction of rotation about the axis of rotation 17 and extend in the axial direction parallel to the axis of rotation 17.
  • the cooling holes 21 are arranged in axial projection overlapping with the bearing devices 14 a, b.
  • the free diameter of the cooling hole 21 is as wide as the width of the bearing means 14 a, b in the radial direction.
  • slits are provided in the illustrated longitudinal section and annular disks as free spaces 22 a, b, which are open in the direction of the hollow shaft space 18.
  • arrows 23, 24 show a possible flow of the transmission oil.
  • the gear oil flows from an annular gap 25 between the plug-in axis 2 a and the rotor shaft 7 and the housing 15 via the space 22 a ( Figure 2) in the cooling hole 21, traverses it and thereby cools the rotor shaft 7 and then passes over the free space 22nd b on the bearing device 14 b over in the annular gap 26, which is arranged between the sun shaft 8 and the motor plate 16.
  • the direction of flow may also be reversed.
  • the stator of the electric motor 3 by means of a non-illustrated water cooling to a temperature of max. 55 ° C cooled.
  • the advantage of the cooling described above is the reduction of a temperature gradient between the stator and the rotor shaft 7 or the bearing devices 14a, b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • General Details Of Gearings (AREA)

Abstract

Un objet de l'invention vise à proposer un dispositif d'entraînement, notamment pour un véhicule, comportant un ensemble rotor amélioré. A cet effet, l'invention concerne un dispositif d'entraînement (1) comportant un ensemble rotor (6,7) qui est associé à un moteur électrique (3) et conçu pour tourner autour d'un axe de rotation (17), l'ensemble rotor (6,7) comportant au moins une partie canal (21) s'étendant dans l'axe et conçue pour le passage d'un fluide de refroidissement de l'ensemble rotor (6,7). Selon l'invention, la au moins une partie canal (21) est disposée de manière excentrée et/ou décalée par rapport à l'axe de rotation (17).
PCT/EP2012/053705 2011-04-13 2012-03-05 Dispositif d'entraînement comportant un ensemble rotor pouvant être refroidi WO2012139820A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011007255A DE102011007255A1 (de) 2011-04-13 2011-04-13 Antriebsvorrichtung mit einer kühlbaren Rotoranordnung
DE102011007255.1 2011-04-13

Publications (2)

Publication Number Publication Date
WO2012139820A2 true WO2012139820A2 (fr) 2012-10-18
WO2012139820A3 WO2012139820A3 (fr) 2013-07-18

Family

ID=45811491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/053705 WO2012139820A2 (fr) 2011-04-13 2012-03-05 Dispositif d'entraînement comportant un ensemble rotor pouvant être refroidi

Country Status (2)

Country Link
DE (1) DE102011007255A1 (fr)
WO (1) WO2012139820A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140062229A1 (en) * 2011-04-13 2014-03-06 Schaeffler Technologies AG & Co. KG Drive device, especially for a vehicle
CN110998147A (zh) * 2017-08-03 2020-04-10 Zf腓特烈斯哈芬股份公司 车辆的具有电机的油供应装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016209173A1 (de) * 2016-05-25 2017-11-30 Volkswagen Aktiengesellschaft Rotor für eine elektrische Maschine
DE102018211358B4 (de) 2018-07-10 2020-10-29 Audi Ag Schmiermittelversorgungssystem für eine Antriebsvorrichtung eines elektrisch betriebenen Fahrzeugs
DE102018211360B4 (de) 2018-07-10 2020-10-29 Audi Ag Schmiermittelversorgungssystem für eine Antriebsvorrichtung eines elektrisch betriebenen Fahrzeugs
DE102018211357B4 (de) 2018-07-10 2020-10-29 Audi Ag Schmiermittelversorgungssystem für eine Antriebsvorrichtung eines elektrisch betriebenen Fahrzeugs
DE102018211356B4 (de) 2018-07-10 2020-10-29 Audi Ag Schmiermittelversorgungssystem für eine Antriebsvorrichtung eines elektrisch betriebenen Fahrzeugs
DE102018211359B4 (de) 2018-07-10 2020-10-29 Audi Ag Schmiermittelversorgungssystem für eine Antriebsvorrichtung eines elektrisch betriebenen Fahrzeugs
DE102018117703A1 (de) 2018-07-23 2020-01-23 Schaeffler Technologies AG & Co. KG Elektrischer Antrieb für ein Fahrzeug mit mehrfach verzweigtem Getriebeölkühlkreis
US10935120B2 (en) * 2018-11-30 2021-03-02 Arvinmeritor Technology, Llc Axle assembly having a spigot bearing assembly
DE102019133886A1 (de) * 2019-12-11 2021-06-17 Schaeffler Technologies AG & Co. KG Ableitvorrichtung mit Luftdurchlass sowie elektrische Antriebsanordnung mit der Ableitvorrichtung
DE102022206911A1 (de) 2022-07-06 2024-01-11 Mahle International Gmbh Elektromotor

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DE4321172C2 (de) 1993-06-25 1996-04-04 Licentia Gmbh Elektrischer Antrieb für ein Kraftfahrzeug
DE19841159C2 (de) 1998-06-18 2000-05-18 Mannesmann Sachs Ag Antriebsanordnung für ein Kraftfahrzeug

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JPH09163680A (ja) * 1995-12-08 1997-06-20 Fuji Electric Co Ltd 外側回転子形冷媒冷却回転電機
JP5017120B2 (ja) * 2005-11-09 2012-09-05 株式会社東芝 回転電機用回転子及び回転電機
JP2007174755A (ja) * 2005-12-20 2007-07-05 Nissan Motor Co Ltd 回転電機
JP2009290979A (ja) * 2008-05-29 2009-12-10 Toyota Motor Corp 永久磁石型モータ

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
DE4321172C2 (de) 1993-06-25 1996-04-04 Licentia Gmbh Elektrischer Antrieb für ein Kraftfahrzeug
DE19841159C2 (de) 1998-06-18 2000-05-18 Mannesmann Sachs Ag Antriebsanordnung für ein Kraftfahrzeug

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140062229A1 (en) * 2011-04-13 2014-03-06 Schaeffler Technologies AG & Co. KG Drive device, especially for a vehicle
US9641039B2 (en) * 2011-04-13 2017-05-02 Schaeffler Technologies AG & Co. KG Drive device, especially for a vehicle, having an electric drive with a rotor shaft bearing system
CN110998147A (zh) * 2017-08-03 2020-04-10 Zf腓特烈斯哈芬股份公司 车辆的具有电机的油供应装置
CN110998147B (zh) * 2017-08-03 2023-02-24 Zf腓特烈斯哈芬股份公司 车辆的具有电机的油供应装置

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Publication number Publication date
WO2012139820A3 (fr) 2013-07-18
DE102011007255A1 (de) 2012-10-18

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