WO2018077688A1

WO2018077688A1 - Drive train, in particular hybrid drive train for a motor vehicle

Info

Publication number: WO2018077688A1
Application number: PCT/EP2017/076576
Authority: WO
Inventors: Gerhard Magnussen; Björn Becker
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2016-10-25
Filing date: 2017-10-18
Publication date: 2018-05-03
Also published as: DE102016220951A1; EP3532748A1; CN109844366A

Abstract

The invention relates to a drive train (1), in particular a hybrid drive train (1a) for a motor vehicle, comprising at least one electric machine (2), wherein the electric machine (2) is provided and/or arranged in the region of an output (4), in particular in the region of a differential (4a), wherein the electric machine (2) is and/or can be connected to the output (4), in particular to a drive gear of the differential (4a) and/or to the differential housing, in a functionally effective manner, wherein at least one planetary gearbox (3) is provided for transferring torques from the electric machine (2) to the output (4) (or vice versa), wherein the planetary gearbox (3) has a planetary gearbox housing (3a) and a first and a second planetary gearbox stage (I, II) each having components, specifically wherein the first planetary gearbox stage (I) has at least one first sun gear (5), at least one first planet gear (6), and at least one first ring gear (7) and/or wherein the the second planetary gearbox stage (II) has at least one second sun gear (8), at least one second planet gear (9) and at least one second ring gear (10). The design complexity and assembly complexity is reduced in that the first ring gear (7) and the second ring gear (10) are each designed as a separate ring gear (7, 10), wherein the first and second ring gears (7, 10) are arranged and/or provided at a distance from each other in such a way that a stationary bearing shield (11) is arranged and/or provided so as to extend at least partly between the first and the second ring gears (7, 10) in the direction of the interior (3b) of the planetary gearbox housing (3a), and wherein components of the first and/or of the second planetary gearbox stages (I, II) are at least partly supplied with coolant and/or lubricant by means of the bearing shield (11).

Description

description

Powertrain, in particular hybrid powertrain for a motor vehicle

The invention relates to a drive train, in particular a hybrid drive train for a motor vehicle according to the features of the preamble of claim 1.

In the prior art are differently shaped drive trains for

Motor vehicles, in particular a plurality of hybrid powertrains for

Motor vehicles known. Such a drive train has at least one

Electric machine, in particular an electric motor. Such a drive train is known for example from DE 10 2001 217 762 A1, where the electric machine is provided and / or arranged in the region of the output, in particular in the region of a differential.

In the generic drive train (DE 10 2015 203 068 A1), is the

Electric machine provided in the region of a differential, in particular arranged coaxially to a driven via the differential wheel drive shaft. The

Electric machine is functionally effective with the output, namely with the drive wheel of the differential or connected to the differential case, wherein at least one planetary gear is provided for transmitting torque from the electric machine to the output, ie to the differential (or vice versa). The

Planetary gear has a planetary gear housing and a first and second planetary gear stage with the respective components. The first

Planetary gear stage comprises a first sun gear, a plurality of first planetary gears and a first ring gear, wherein the second planetary gear stage comprises a second sun gear, a plurality of second planetary gears and a second ring gear.

In the generic state of the art, the first and second ring gear is formed as a common ring gear and arranged substantially on the inside of the planetary gear housing or here as an integral

formed fixed component of the planetary gear housing. In particular, for the electric drive or for the electric machine, in particular for the electric motor uses a so-called "high-speed electric machine" whose power is converted via a reduction gear, here a two-stage planetary gear in a propulsion power for a motor vehicle

Drive train with the electric machine and the planetary gear is dependent on the available space of the motor vehicle drive as a whole. For cooling and / or lubrication of the planetary gear, a defined cooling oil volume flow must generally be available. Therefore, especially with a one-time oil filling, taking into account the vehicle life

in particular also sufficient oil volume be kept. The latter requires a correspondingly large space or in particular a correspondingly large interior of the planetary gear housing. Furthermore, the formation of the first and the second ring gear as a common ring gear limits the constructive possibilities for a bearing of the components of the first and second planetary gear stages. Thus, the arrangement, training and / or the number of required bearings construction and / or assembly-consuming. That between the planetary gear stages and / or within a

Planet gear stage required game is achievable only through a complex specific storage of the components, whereby the design, installation and / or the cost is correspondingly large.

Thus, in the prior art, in particular for example from DE 10 2004 050 137 B4, a cooling and / or a lubricant reservoir, in particular a

Oil reservoir known in which over a variety of oil channels an oil supply point sufficient oil is provided, in particular independent of a change in the speed of the vehicle.

The invention is therefore based on the object, the generic drive train from which the invention proceeds, now such and further develop that the design and / or assembly costs is reduced, in particular a simple cooling or lubrication of the components of the respective planetary gear stage is possible.

The above-mentioned object is now first by the features of

Claim 1 solved. First, the first and the second ring gear is each formed as a separate ring gear, so that the first and second ring gear is spaced from each other can be arranged. In this way, in particular a further component, namely a stationary bearing plate at least partially disposed between the first and the second ring gear and / or provided or at least partially extend between the first and the second Hohrad in the direction of the interior of the planetary gear housing. With the aid of the bearing plate provided in this way, it is at least partially possible to realize a mounting of components of the first and / or the second planetary gear stage and / or at least partially to provide coolant and / or lubricant supply to components of the first and / or the second planetary gear stage. Characterized in that a bearing plate between the first and the second ring gear is provided which can extend in particular from the inner wall of the planetary gear housing in the direction of the interior of the planetary gear housing, on the one hand because the bearing plate "fixed", this bearing plate can be used to a structurally simple and realize cost-effective storage of specific components of the respective planetary gear stage, and / or on the other hand, this bearing plate, in particular at the same time, also used or used to realize the necessary cooling and / or lubricant supply, in particular of specific components of the first and / or second planetary gear stage The construction and assembly costs for the storage of the components of the respective planetary gear stage is therefore correspondingly reduced, wherein in particular at the same time a corresponding cooling and / or lubricant supply to the components of the first and / or the second planetary gear stage is ensured in a simple manner, and now - in particular, as a whole - a simple storage and cooling or lubricant supply concept can be realized. With the help of the bearing plate in particular bearing receiving areas in the interior of the planetary gear housing can be formed and / or with the help of the bearing plate, the coolant and / or lubricant from a cooling and / or

Lubricant reservoir outside of the planetary gear housing are led into the interior of the planetary gear housing, in particular to specific locations.

In particular, the electric machine is arranged coaxially to a wheel drive shaft, wherein the first and second planetary gear stage are arranged substantially sequentially one behind the other. The drive shaft of the electric machine, in particular a rotor shaft is rotatably connected to the first planetary gear stage, wherein the first planetary gear stage rotationally effective with the second planetary gear stage and the second planetary gear stage rotatably connected via the output, in particular via the differential to the wheel drive shaft and / or connectable. This is a drive of the vehicle, starting from the electric machine to the

Radantriebswelle allows, in particular when the electric machine is used as an electric motor, or (conversely) a generator operation of

Electric machine allows when torque from the wheel drive shaft on the previously explained transmission path then in the opposite direction to the

Electric machine, which then works as a generator, is transmitted. A

Baraumsparende arrangement of the electric machine with the use of

Electric machine as electric motor or as a generator is therefore feasible accordingly.

In the preferred embodiment, a planet carrier of the first

Planet wheel with the second sun gear rotatably coupled, in particular rotationally fixed, wherein a planet carrier of the second planetary gear with the output, in particular with the drive wheel of the differential and / or the differential housing is coupled in a rotationally effective manner. In particular, the planet carrier of the second planetary gear of the second planetary gear stage is designed as an "interface", so that the already known in the prior art gear / differentials with the respective electric machine and the planetary gear can also be retrofitted.

The bearing plate is now substantially annular and extends substantially inwardly starting from the planetary gear housing, in particular from the inner wall of the planetary gear housing. At his

Outer circumference, the bearing plate on a support region, with which the bearing plate rests against the inner wall of the planetary gear housing. On the inner circumference of the bearing plate is a first bearing receiving area and in the central region of the bearing plate, a second bearing receiving area for the arrangement of corresponding bearing elements, which will be explained in more detail below, is provided. Due to the appropriate design of the bearing plate are on the one hand

Lageraufnahmebereiche educable, on the other hand corresponding flow channels, as already mentioned.

In the preferred embodiment, a first bearing element is arranged on the first bearing receiving area of the bearing plate, which at least partially for the Storage of the first planet carrier and / or is provided for the storage of the second sun gear. In particular, the first bearing element is a

Deep groove ball bearings designed to absorb radial and axial forces. As a result, the second sun gear can be stored essentially without any significant play.

At the second bearing receiving area, a second bearing element can be arranged, which is provided for the at least partial mounting of the second planet gear carrier. In particular, the second bearing element is as an axial needle bearing for receiving axial forces and / or to enable a radial clearance of the second

Planetenradträgers executed. As a result, in particular, the realization of an "interface" with a corresponding radial play to the output,

in particular allows the drive wheel of the differential. The fact that now in particular the first ring gear with an effective radial clearance and the second ring gear substantially without effective radial play on each

Planetary gear housing, in particular in each case is arranged rotationally fixed, on the one hand, a corresponding balance between the first and second planetary gear stage, on the other hand enables a radial clearance of the second planetary gear stage. Since the second ring gear is arranged substantially without an effective radial clearance, so the game of "interface" is essentially determined by the "specific component of the storage of the second planet carrier" and / or on the game of the second bearing element, in particular a minimum how a maximum clearance of the second planet carrier is set in the radial direction or previously determined. In particular, the second bearing element is as a

Axial needle bearing executed.

The drive shaft of the electric machine, in particular the rotor shaft as a

Electric motor running electric machine is mounted with the help of a third bearing element, in particular by means of a deep groove ball bearing in the radial direction substantially free of play. The first sun gear of the first planetary gear stage is in particular formed as an integral part of the drive shaft, in particular of the rotor shaft of the electric machine.

The second planet carrier has an extension, which is designed as an interface that can be connected in terms of rotation with the output, wherein the end region of the extension is designed to be partially scored in particular on the inner circumference. This allows the corresponding end region of the extension, in particular due to the Sliding easily on a geritztelt on the outer circumference drive wheel of the differential or connect to an output according to previously described realized game.

It can now be a space-saving planetary gear housing formed

or be provided, wherein outside of the planetary gear housing, a cooling and / or lubricant reservoir is provided, in particular is attached directly to the planetary gear housing. The coolant and / or lubricant reservoir is fluidly connected to the interior of the planetary gear housing at least over the end shield. For this purpose, the bearing plate has at least one formed flow channel which communicates with the coolant and / or lubricant reservoir

fluidly connected. Since the bearing plate extends in particular partially radially into the interior of the planetary gear housing, a coolant and / or lubricant in the interior of the planetary gear housing is well distributed,

In particular, the respective components of the first and second

Planetary gear stage easily coolable and / or lubricated. The filling of the flow channel of the bearing plate is using the in the cooling and / or

Lubricant reservoir existing hydrostatic pressure, in particular without a separate pumping device possible. In particular, is in the cooling and / or

Lubricant reservoir provided at least partially vertically arranged and / or at least partially vertically extending feed pipe (overflow pipe) or the flow channel of the bearing plate to the feed pipe in particular via a corresponding further feed channel fluidly connected. This flow connection is structurally simple to design and inexpensive to produce. The bearing plate and / or the flow channel of the bearing plate has at least one cooling and / or lubricant outlet opening. In particular, the flow channel has a plurality of cooling and / or lubricant outlet openings, with the aid of which the coolant and / or lubricant can be fed to the specific components of the first and / or second planetary gear stage locally or to these specific locations, this may be explained in more detail below ,

In particular, at least one guide element, in particular a guide plate for guiding and / or discharging at least one part of the coolant and / or lubricant, in particular to the fourth, is located substantially adjacent to the first and / or second planet carrier of the first and / or second planetary gear

Bearing elements, which are arranged for mounting the planetary gears provided. In particular, in the middle region of the interior of the

Planetary gear housing provided specific components, in particular the first and second planet carrier or provided here in particular for supporting the planetary gears or trained webs and provided for the storage of the planetary gears, in particular fourth bearing elements can cool and / or lubricate using the bearing plate in a simple manner ,

Finally, the planetary gear housing has a cooling and / or

Lubricant planer for realizing a return of the cooling and / or

Lubricant from the interior of the planetary gear housing back into the coolant and / or lubricant reservoir. In particular, corresponding further flow channels and / or outlet openings for realizing the return of the coolant and / or lubricant from the interior of the planetary gear housing are provided in the coolant and / or lubricant reservoir. In this way, in particular, a corresponding coolant and / or lubricant circuit with a corresponding drive of the planetary gear, preferably due to the then acting on the coolant and / or lubricant centrifugal forces, caused by the

moving planetary gears, realized.

In the end, the disadvantages mentioned above are avoided and corresponding advantages achieved, in particular, the invention described above

Drivetrain designed as a hybrid powertrain for a motor vehicle and especially in a four-wheel drive vehicle to drive the front axle

or used to drive the front wheels.

There are now a variety of ways to design the powertrain according to the invention now in an advantageous manner and further. For this purpose, reference may first be made to the patent claim 1 and to the claims subordinate to claim 1. The following may be a preferred

Embodiment of the drive train according to the invention will be explained in more detail with reference to the following description and the drawings below. In the drawing shows:

Fig. 1 in a simplified schematic representation of essential components of the drive train according to the invention partly in section, but only in a so-called "half-tone representation", in particular for clarity of the bearing concept realized here for the storage of the components of the first and second planetary gear stage,

2 is a simplified schematic representation substantially analogous to Figure 1, the essential components of the drive train according to the invention, in particular arranged in the planetary gear housing components of the first and second planetary gear stage including the partial representation of guide elements for implementing a cooling and / or lubricant supply.

Fig. 3 in a schematically partially sectioned view of the side of the

Planetary gear and an affiliated to the planetary gear housing cooling and / or lubricant reservoir including a simplified representation of the realized cooling and / or lubricant supply, and

4 is a simplified representation of essential components of

Planetenradgetriebes, wherein certain components have been omitted in the illustration, in particular, Fig. 4 here shows the first and second planetary gear set including a simplified schematically illustrated coolant or lubricant flow.

1 to 4 show at least partially in each case in a simplified schematic representation, in particular Figs. 1 and 2 in a so-called "half

A drive train 1, in particular a hybrid drive train 1 a for a motor vehicle not shown in detail, is not shown in detail in the internal combustion engine of the hybrid drive train 1 a of the motor vehicle and / or its coupling to the drive train 1.

The electric machine 2 and / or the planetary gear 3 are provided in the region of an output, in particular in the region of an output 4, in particular in the region of a differential 4a, wherein the output 4 or the differential 4a is not shown in detail, but should only be symbolized by the arrow shown in FIGS. 1 and 2. The electric machine 2 is operatively connected to the output 4, in particular with a drive wheel of the differential 4a and / or connected to a differential housing or connectable. For transmitting torque from the electric machine 2 to the output 4 (or vice versa) at least the aforementioned planetary gear 3 is now provided. The planetary gear 3 has a planetary gear housing 3a and a first and second planetary gear stage I and II. The first planetary gear stage I or the second planetary gear stage II has respective corresponding specific components.

The first planetary gear stage I has at least one first sun gear 5, at least one first planet gear 6 and at least one first ring gear 7.

In particular, the first planetary gear stage I is designed as a so-called "input stage".

The second planetary gear stage II has at least one second sun gear 8, at least one second planet gear 9 and at least one second ring gear 10. In particular, the second planetary gear stage II is designed as a so-called "load stage".

In particular, the first planetary gear stage I or the second planetary gear stage II has a plurality of first and second planetary gears 6 and 9, respectively, in each case between three and five first

or second planet gears 6 and 9, respectively.

The at least partially shown in FIGS. 1 to 4 drive train 1, in particular the hybrid powertrain 1 a is provided for a motor vehicle and in particular in the range of a not shown in detail here output 4, in particular in the range of a differential 4a can be arranged, wherein for the transmission of Torques between the electric machine 2 and the output 4 and the differential 4a, the planetary gear 3 is provided with the first and second planetary gear I and II or arranged accordingly. In particular, the drive train 1, here is a hybrid powertrain 1 a for a motor vehicle with

Four-wheel drive to drive the corresponding front axle.

The aforementioned disadvantages are now initially avoided by the fact that the first ring gear 7 and the second ring gear 10 are each formed as a separate ring gear 7 and 10, wherein the first and the second ring gear 7 and 10th so spaced apart and / or provided so that a fixed bearing plate 1 1 at least partially between the first and the second ring gear 7 and 10 in the direction of the interior of the 3b

Planetary gear housing 3a arranged extending and / or is provided, and wherein with the aid of the bearing plate 1 1 at least partially a storage of

Components of the first and / or the second planetary gear I

or II and / or at least partially a cooling and / or

Lubricant supply of components of the first and or the second

Planetary gear I or II is realized.

Due to the arrangement and / or design of the bearing plate 1 1 now on the one hand a "specific storage concept" for the components of the first and / or second planetary gear I and II can be realized, wherein, in particular at the same time, on the other hand, a "specific cooling and / or Lubricant supply concept "with the help of the bearing plate 1 1 can be realized.

Due to the provided bearing plate 1 1 decisive advantages are therefore achieved, in particular, the design and assembly costs and the associated costs are reduced and there are realized corresponding advantages. This may now be explained in more detail below, with particular attention firstly being given to the realized "specific storage concept":

As can be clearly seen in particular from FIGS. 1 and 2, the electric machine 2 is arranged coaxially to a wheel drive shaft 12. The wheel drive shaft 12 is essentially driven in accordance with the output 4, in particular via the differential 4a.

As Figs. 1 and 2 further show, the first and second

Planetary gear I and II arranged substantially sequentially one behind the other. Here, the drive shaft 2 a of the electric machine 2 is rotatably connected to the first planetary gear stage I, wherein the first planetary gear stage I rotationally effective with the second planetary gear stage II and the second

Planetary gear stage II rotationally effective on the output 4 not shown here in detail, in particular via the differential 4a not shown here in detail connected to the wheel drive shaft 12 and / or connectable. In particular, the electric machine 2 is designed here as an electric motor or the drive shaft 2 a as a rotor shaft. Fig. 1 shows the electric machine 2 with the drive shaft 2a and the rotor shaft, wherein in the embodiment shown here at the end of the drive shaft 2a, the first sun gear 5 in

Is formed substantially crenellated. The first sun gear 5 of the first

Planetary gear I is therefore in particular an integral part of

Drive shaft 2a formed. Also conceivable are other embodiments, for example a sun gear arranged separately on the drive shaft and / or a subdivision of the drive shaft into a plurality of sections / segments and / or corresponding connections to the electric machine, in particular to the rotor and / or a rotor carrier of the electric machine.

In particular, from FIGS. 1 and 2 can be seen a first Planetenradtrager 13 of the first planetary gear 6 and a second Planetenradtrager 14 of the second

9. The first Planetenradtrager 13 serves to support the first planetary gear 6 and has for this purpose in particular a web 13a, and the second Planetenradtrager 14 serves to support the second planetary gear 9 and has for this purpose in particular a web 14a. The first Planetenradtrager 13 is rotationally effective with the second sun gear 8, in particular rotatably coupled, wherein the second

Planetenradtrager 14 with the output 4 rotationally effective, in particular rotatably coupled.

The bearing plate 1 1 is substantially annular and extends substantially inwardly, starting from an unspecified inner wall of the planetary gear housing 3a radially inwardly, in particular in the direction of

Interior 3b of the planetary gear housing 3a at least partially between the first and second ring gear 7 and 10. At its outer periphery, the bearing plate 1 1 a support portion 1 1 a. With the help of the support area 1 1 a is the

End plate 1 1 at the unspecified inner wall of the

Planetary gear housing 3a arranged or supported accordingly. At the

Inner circumference of the bearing plate 1 1 is a first bearing receiving portion 1 1 b and in the central region of the bearing plate 1 1, a second bearing receiving portion 1 1 c provided. The bearing receiving areas 1 1 b and 1 1 c serve to accommodate and / or arrangement of corresponding bearing elements, which will be explained in more detail below. In particular, the first and second bearing receiving area 1 1 b and 1 1 c by substantially on the inner periphery of the bearing plate 1 first hervororkragende areas or limited by unspecified projections in particular at least one side.

At the first bearing receiving portion 1 1 b, a first bearing element 15 is arranged, which is at least partially provided for the storage of the first Planetenradtragers 13 and / or for the storage of the second sun gear 8. The first bearing element 15 is designed here in particular as a deep groove ball bearing for receiving radial and axial forces.

At the second bearing receiving portion 1 1 c of the bearing plate 1 1 is a second

Bearing element 16 is arranged. The second bearing element 16 serves to at least partially support the second planet carrier 14, wherein the second

Bearing member 16 is designed in particular as an axial needle bearing for receiving axial forces and / or to enable radial play of the second planet carrier 14.

1 and 2 show that here two second bearing elements 16 are provided for mounting the second planet carrier 14, wherein a second bearing element 16 on the second bearing receiving portion 1 1 c of the bearing plate 1 1 is arranged and the other second bearing element 16 substantially on the other side of the second planet carrier 14 between the second planet carrier 14 and a

Inner wall of the planetary gear housing 3a is arranged or provided.

The first ring gear 7 of the first planetary gear stage I is arranged with an effective radial clearance, in particular in a not designated here recess of the planetary gear housing 3a. The second ring gear 10 of the second

Planetary gear stage II is arranged substantially without effective radial play on the planetary gear housing 3a. The second ring gear 10 may in particular also be formed as an integral part of the planetary gear housing 3a. In particular, the first and second ring gear 7 and 10 each rotatably on

Planetary gear housing 3a arranged.

Furthermore, FIGS. 1 and 2 show that the drive shaft 2 a of the electric machine 2 is mounted essentially free of play in the radial direction with the aid of a third bearing element 17, in particular with the aid of a deep groove ball bearing. The third bearing element 17 also serves to support the first sun gear 5, which is in particular formed as an integral part of the drive shaft 2a, in particular a rotor shaft.

1 and 2, the first planet carrier 13 is mounted with two first bearing elements 15, wherein a first bearing element 15 on the inner circumference of the bearing plate 1 1, namely in the first bearing receiving portion 1 1 b is arranged and the second first bearing element 15 substantially on the other side of the

Planetenradtragers 13 is provided between an unspecified housing wall of the electric machine 2 and a corresponding extension of the first planet carrier 13.

Finally, FIGS. 1 and 2 show that the second planet carrier 14 has an extension 14a, which is designed as an interface that can be connected to the output 4 in a rotationally effective manner. The end portion of the extension 14b is formed on the inner circumference in particular geritzel, so that in this way an "interface" is formed, so that the unit shown in Fig. 1 and 2 of the electric machine 2 and planetary gear 3 substantially to a not-shown here driving a Downforce 4 and / or to a substantially thereby formed

Differential housing 4a can be pushed.

Due to the bearing concept described above, a baraumsparende and compact storage of the first and second planetary gear I and II is possible. The first planet carrier 13 is guided very precisely, in particular in the radial direction, wherein the second planet carrier 14 in the radial direction has a certain, in particular certain game, so that here by the second

Planet wheel 14, in particular by the extension 14b formed "interface" easily mounted, in particular on the drive wheel of an output 4, in particular a differential 4a can be pushed.

Furthermore, non-uniformities in the rotation between the first and second planetary gear I and II are compensated by the bearing concept described here, because it is the necessary for planetary gear stages I and II elastic compensation realized by this bearing concept. A radial compensation of

Nonuniformity is ensured in the second planetary gear stage II, in particular in the load stage, wherein the second ring gear 10 is positioned substantially free of play on the planetary gear housing 3a. Since the second sun gear 8 on the The first planetary gear carrier 13 is positioned substantially play-free, the radial clearance of the second planetary gear carrier 14 is determined substantially by the second bearing elements 16. In particular, the planetary gears, here the first and second planetary gears 6 and 9 are rotatably supported via fourth bearing elements 18 on the respective webs 13a and 14a of the planet carrier 13 and 14, respectively. Due to the good guidance / mounting of the respective planetary gears 6, in particular a fast-rotating first planetary gear stage I (input stage) can be realized with a good acoustic behavior. The corresponding bearing concept therefore allows good guidance and force absorption of the resulting forces with a small number of bearings.

In the preferred embodiment, the bearing plate 1 1 is designed as a separate component and arranged with the aid of the support portion 1 1 a on the unspecified inner wall of the planetary gear housing 3a. In addition, or is here for fixing a unspecified fastener, in particular a locking ring is provided. It is also conceivable that the bearing plate is formed as an integral part of the planetary gear housing or on a

Ring gear, in particular arranged on the second ring gear, in particular

is welded. However, the formation of the bearing plate 1 1 as a separate component has proven to be particularly advantageous and inexpensive.

At this point, it may once again be mentioned explicitly that the above-mentioned "specific storage concept" individually individually, but also in combination with the now described in the following "specific cooling and / or

The same applies to the "cooling and / or lubricant supply concept" to be described in the following, which essentially applies on its own but also in combination with the above

described "storage concept" can be realized.

In the following may now essentially the "specific cooling and / or

Lubricant supply concept "are explained in more detail, wherein in this

In particular, reference may be made to FIGS. 2 to 4:

In particular, Fig. 3 shows that outside the planetary gear housing 3a, a cooling and / or lubricant reservoir 19 is provided. The cooling and / or

Lubricant reservoir 19 is connected to the interior 3b of the planetary gear housing 3a fluidly connected at least over the end plate 1 1. This can be seen in particular partially from FIG. 3 and also from FIG. 4.

The bearing plate 1 1 has at least one flow channel 1 1 d and / or limited, in particular on the inner circumference also a partially annular

Flow channel 1 1 e. The flow channel 1 1 d runs essentially from

Outer circumference to the inner circumference of the bearing plate 1 1 and the

Flow channel 1 1 e is partially annular on the inner circumference of the bearing plate 1 1. The flow channels 1 1 d and 1 1 e are each other

fluidly connected or fluidly connected to the cooling and / or lubricant reservoir 19.

In particular, the filling of the flow channel 1 1 d or 1 1 e by means of the present in the coolant and / or lubricant reservoir 19 hydrostatic pressure, in particular via a in the coolant and / or lubricant reservoir 19 at least partially vertically arranged and / or at least partially vertically extending Feed tube 20 and / or via a flow channel 1 1 d leading feed channel 21st

The feed tube 20 can also be referred to as an "overflow tube", wherein the feed channel 21 is in particular also at least partially formed in the planetary gear housing 3a, as can be seen from FIG.

The bearing plate 1 1 and / or the flow channel 1 1 d or 1 l e has at least one cooling and / or lubricant outlet opening 1 1f, or even more lubricant outlet openings 1 1 f. In particular, the

Lubricant outlet opening 1 1 f formed at the radial inner end of the flow channel 1 1 d. The flow circuit of the coolant and / or lubricant is

symbolized in particular in FIGS. 3 and 4 with the aid of the arrows there

shown.

2, it can also be seen that substantially adjacent to the first and / or second planet carrier 13 or 14 of the first and / or second planetary gear 6 or 9, in particular in the region of the webs 13a and 14a, at least one guide element 22, in particular a baffle 22a for guiding and / or discharging at least part of the cooling and / or Lubricant is provided in particular to the fourth bearing elements 18 of the first and second planet gears 6 and 9, respectively. Thus, in particular, the first planet 13 have a radially outwardly projecting, unspecified here extension, which fulfills the function of an oil collector in a certain area of the planetary gear housing 3a. In the preferred embodiment shown here, a guide element 22 is arranged or provided in the region of the web 13a.

Furthermore, it can be seen from FIG. 3 that the planetary gear housing 3a has a coolant and / or lubricant planer 23 for realizing a return of the coolant and / or lubricant from the interior 3b of the planetary gear housing 3a back into the coolant and / or lubricant reservoir 19 and / or according to further flow channels, in particular an outlet opening 24 here. The flow of coolant and / or lubricant is represented or symbolized by the corresponding arrows in FIGS. 3 and 4, the first and second planet gears 6 being in operation of the drive train 1, in this case of the hybrid drive train 1 a, in particular due to the direction of rotation (when the motor vehicle moves forwards) or 9 with the aid of the cooling and / or lubricant planer 23, the thrown to the inner wall of the planetary gear housing 3a coolant and / or lubricant

"Planed" and back into the coolant and / or lubricant reservoir 19 is performed.

Thus, in particular also on the end plate 1 1 coolant and / or lubricant provided in the respective webs 13a and 14a of the planetary gear 13 and 14 holes and / or unspecified channels the

corresponding cooling and / or lubricant in particular also to the fourth bearing elements 18 passed, in particular with the help of the corresponding

Guide element 20, as shown in FIGS. 2, 3 and 4 recognizable.

In particular, the cooling and / or lubricant concept is realized without a pump, but the arrangement of an additional, in particular electrically operated, pump is also conceivable. Because the coolant and / or lubricant is collected in a coolant and / or lubricant reservoir 19 outside the planetary gear 3, splash losses in the planetary gear 3 are avoided. These measures lead to a high efficiency of the planetary gear 3 and minimize the costs associated with the cooling and / or lubricant concept. List of Reference Powertrain

a hybrid powertrain

electric machine

a drive shaft

planetary gear

a planetary gearbox

b interior

Downforce (arrow)

a differential (arrow)

first sun gear

first planetary gear

first ring gear

second sun bath

second planetary gear

0 second ring gear

1 end shield

1 a support area

1 b first bearing receiving area

1 c second bearing receiving area

1 d flow channel

e flow channel

1f Coolant and / or lubricant outlet opening 2 Radantriebswelle

3 first planet carrier

3a footbridge

4 second planet carrier

4a bridge

4b extension

5 first bearing element

6 second bearing element

7 third bearing element

8 fourth bearing element Coolant and / or lubricant reservoir feed tube

feed

vane

a baffle

Coolant and / or lubricant planer outlet opening

first planetary gear stage second planetary gear stage

Claims

claims

1. powertrain (1), in particular hybrid powertrain (1 a) for a motor vehicle, with at least one electric machine (2), wherein the electric machine (2) in the region of an output (4), in particular in the region of a differential (4a) provided and / or is arranged, wherein the electric machine (2) operatively connected to the output (4), in particular with a drive wheel of the differential (4a) and / or with the differential housing, connected and / or connectable, wherein for transmitting torque from the electric machine (2) at least one planetary gear (3) is provided on the output (4) (or vice versa), wherein the planetary gear (3) comprises a planetary gear housing (3a) and a first and a second planetary gear stage (I, II) with respective components, namely, wherein the first planetary gear stage (I) at least a first

Sun gear (5), at least one first planetary gear (6) and at least a first ring gear (7) and / or wherein the second planetary gear stage (II) at least a second sun gear (8), at least one second planet gear (9) and at least one second Ring gear (10), characterized in that the first ring gear (7) and the second ring gear (10) each as a separate ring gear (7, 10) is formed, wherein the first and second ring gear (7, 10) arranged spaced from each other and / or is provided, so that a stationary bearing plate (1 1) at least partially between the first and the second ring gear (7, 10) in the direction of the interior (3b) of the

Planetary gear housing (3a) arranged extending and / or is provided, and wherein by means of the bearing plate (1 1) at least partially a cooling and / or lubricant supply of components of the first and / or the second planetary gear stage (I, II) is realized.

2. Drive train according to the claim 1, characterized in that

outside the planetary gear housing (3a) a cooling and / or

Lubricant reservoir (19) is provided, wherein the cooling and / or

Lubricant reservoir (19) with the interior (3b) of the

Planetary gear housing (3a) at least over the bearing plate (1 1)

fluidly connected.

3. Drive train according to one of claims 1 or 2, characterized in that the bearing plate (1 1) has at least one flow channel (1 1 d) and / or in particular a partially annular flow channel (1 1 e) limited, which with the cooling and / or lubricant reservoir (19)

fluidly connected.

4. Drive train according to claim 3, characterized in that the filling of the

Flow channel (1 1 d, 1 1 e) using the in the cooling and / or

Lubricant reservoir (19) existing hydrostatic pressure, in particular via a in the coolant and / or lubricant reservoir (19) at least partially vertically arranged and / or at least partially vertically extending feed tube (20) and / or to a flow channel (1 1 d, 1 e) leading feed channel (21) is possible.

5. Drive train according to one of claims 1 to 4, characterized in that the bearing plate (1 1) and / or the flow channel (1 1 d) at least one cooling and / or lubricant outlet opening (1 1f), in particular the

Flow channel (1 1 d) has a plurality of cooling and / or lubricant outlet openings.

6. Drive train according to one of claims 1 to 5, characterized in that substantially adjacent to the first and / or second planet carrier (13, 14) of the first and / or the second planet gear (6, 9) at least one guide element (22) , in particular a guide plate (22a) for guiding and / or discharging at least a part of the coolant and / or lubricant, in particular to fourth bearing elements (18) of the planetary gears (6, 9) is or are provided.

7. Drive train according to one of claims 1 to 6, characterized in that the planetary gear housing (3a) a cooling and / or Schmiermittelhobel (23) for realizing a return of the coolant and / or lubricant from the interior (3b) of the planetary gear housing ( 3a) back into the coolant and / or lubricant reservoir (19) and / or corresponding further flow channels and / or outlet openings (24).

8. Drive train according to one of the preceding claims, characterized

in that the electric machine (2) is arranged coaxially to a wheel drive shaft (12) and / or that the first and second planetary gear stages (I, II) are arranged substantially sequentially one behind the other, wherein the

Drive shaft (2 a) of the electric machine (2) rotationally effective with the first

Planetary gear stage (I), the first planetary gear stage (II) rotationally effective with the second planetary gear stage (II) and the second planetary gear stage (II) rotationally effective via the output (4), in particular via the differential (4a) connected to the Radantriebswelle (12) and / or connectable.

9. Drive train according to one of the preceding claims, characterized

characterized in that a first Planetenradtrager (13) of the first planetary gear (6) with the second sun gear (8) rotatably coupled, in particular rotationally fixed and a second Planetenradtrager (14) of the second planetary gear (9) with the output (4) is rotationally coupled ,

10. Drive train according to claim 9, characterized in that the second Planetenradtrager (14) has an extension (14b) which is designed as a rotationally effective with the output (4) connectable interface, wherein the end portion of the extension (14b) in particular partially is scored on the inner circumference.

1 1. Drive train according to one of the preceding claims, characterized

characterized in that by means of the bearing plate (1 1) at least partially a storage of components of the first and / or the second

Planetary gear stage (I, II) is realized.