DE102011079162A1 - Transmission device with at least one electric motor for a vehicle - Google Patents

Abstract

The invention has for its object to provide a transmission device with at least one electric motor for generating a driving torque for a vehicle, which is manufactured easily manufactured.

Description

The invention relates to a transmission device having at least one electric motor for generating a drive torque for a vehicle, comprising a housing for the electric motor, with a stator for the electric motor, wherein the stator is arranged in the housing, with a cooling ring for the electric motor, wherein the cooling ring is arranged between the stator and the housing and forms cooling channels together with the housing, and with a bearing plate for the electric motor.

Electric drives for vehicles make it possible to generate the drive torque for a vehicle by an electric motor in addition to or instead of an internal combustion engine. The electric drive torque is usually transmitted in the drive train with the interposition of a transmission to the wheels of the vehicle.

For example, the document discloses DE 19841159 A1 a drive unit for a motor vehicle with an electric motor, which is connected via at least one downstream, drive shafts comprehensive differential gear with drive wheels of the motor vehicle in operative connection. The electric motor is arranged coaxially with the drive shaft in this embodiment.

The publication JP 2005278319 A , which is believed to be the closest prior art, similarly discloses a drive unit for a vehicle having an electric motor. The electric motor is arranged in a housing, wherein between the housing and the stator, a cooling water jacket is arranged, which comprises a sleeve which extends coaxially to the stator and which is fixed at the end with a flange via a screw connection to the housing.

Field of the invention

The invention has for its object to provide a transmission device with at least one electric motor for generating a driving torque for a vehicle, which is manufactured easily manufactured.

This object is achieved by a transmission device having the features of claim 1. Preferred embodiments are disclosed in the subclaims, the following description and the figures.

In the context of the invention, a transmission device with an electric motor, that is to say an electromotive transmission device, is proposed, wherein the electric motor in the transmission device is designed to generate a drive torque for a vehicle. The drive torque may be configured as a main torque that exclusively drives the vehicle. However, the drive torque may also be configured as an assist torque or control torque that provides additional drive torque to the vehicle in addition to a main torque of another engine, optionally an electric motor or an internal combustion engine. Thus, the transmission device can be designed in particular as a so-called electrical axle, as an electric drive unit, as a hybrid transmission, as a superposition gear or as a differential gear. In the latter case, it may be provided that the drive torque of the electric motor is selectively transmitted to an axle or a wheel in order to improve the driving behavior of the vehicle. The vehicle is designed, for example, as a passenger vehicle, but in modified embodiments, it may also be a truck.

The transmission device comprises a housing, wherein the electric motor is arranged in the housing. The housing may extend only over the electric motor, but it is also possible that the housing has several areas or that the transmission device has a plurality of housings for a plurality of areas. In one area of the transmission device, the electric motor and in another area, in particular adjacent to the electric motor, a transmission is arranged. The adjacent transmission may be formed, for example, as a planetary gear, preferably as a Stirnradplanetengetriebe, which z. B. is designed as a differential gear or as a superposition gear. Particularly preferably, the housing is formed of metal.

The electric motor comprises a stator, which in a preferred constructional realization comprises a plurality of stator laminations and optionally additionally comprises coils. The stator is arranged as a part of the electric motor in the housing. In addition, the electric motor comprises a rotor which is positioned coaxially and concentrically with the stator in the housing.

In a particularly preferred structural embodiment, the transmission device comprises a rotor shaft which is rotatably coupled to the rotor and which is arranged coaxially and / or concentrically with the rotor and the stator. Particularly preferably, the rotor shaft is designed as a hollow shaft through which a further shaft, for example an output shaft, can be performed.

For temperature regulation, the transmission device comprises a cooling ring, wherein the cooling ring between the stator and the housing is arranged, in particular, the cooling ring is positioned in an annular gap between the stator and the housing. Particularly preferably, the cooling ring in the region of the stator is sleeve-shaped, wherein the cooling ring extends in the axial direction, in particular over the entire length of the stator.

The cooling ring is designed so that it forms cooling channels together with the housing. Thus, it is particularly preferably provided that the cooling ring on the radial outer side in the circumferential direction or helically extending webs, which rest against the radially inner surface of the housing, so that common cooling channels are formed between the webs, in which a medium, in particular Oil or a coolant, is passed through. In particular, the medium contacts the housing and the cooling ring directly. Thus, the cooling ring and housing together form a cooling jacket for the electric motor.

On an axial end face of the electric motor, the gear device has a bearing plate for the electric motor, wherein the bearing plate limits or closes a receiving space for the stator and the rotor. In particular, the bearing plate carries a rotor bearing of the electric motor.

In the context of the invention it is proposed that the bearing plate and the cooling ring are connected together as an assembly which is arranged in the housing. In particular, the assembly is designed to be self-holding to the exclusion of the housing. Particularly preferred bearing plate and cooling ring are connected directly and / or contacting each other.

An advantage of the invention is the fact that the relative positioning between the bearing plate and the cooling ring is already set in the housing before installation of the assembly, so that it is ensured that a defined by the bearing plate rotor bearing is aligned with high precision to the cooling ring. Another advantage is an increased ease of assembly of the transmission device, since the bearing plate and the cooling ring can be used as a common assembly in the housing. If necessary, the bearing plate and the cooling ring can be combined in a separate clamping before installation in the housing with each other to the assembly.

In a preferred embodiment of the invention, the bearing plate and the cooling ring are materially connected to each other and in particular welded together. The cohesive connection requires - in comparison, for example, a screw - only a very small amount of space, because - again compared to the example of the screw - no threaded holes for screws, etc. are provided, which usually take a large axial space. The cohesive connection, in particular the welded connection, is highly resilient. Particularly preferably, the welded joint is implemented by a laser welding process, which is characterized in that the assembly is heated only locally in the region of the welded joint and thus does not distort or only negligibly. Consequently, the implementation of the compound as a material connection, in particular as a welded joint, leads to a compact and highly accurate construction of the assembly.

In a preferred structural design, the bearing plate with a radial outer surface abuts against a radially inner surface of the cooling ring. For example, the bearing plate is inserted with an axial movement in the cooling ring, wherein the radial outer surface or inner surface together form the joining surface between the bearing plate and the cooling ring. Particularly preferably, the joining surface is formed as a cylindrical surface. As a result of this design, in particular installation space in the axial direction is saved, since the components of the assembly can be positioned without overlapping in the axial direction.

In a preferred embodiment of the invention, the weld is designed as a butt weld, wherein the end shield and the cooling ring are welded together from one end side. This area is very easily accessible in terms of manufacturing technology, so that the welding can be carried out simply and reproducibly.

In a preferred structural realization of the invention, the end shield is formed as a forming part, in particular as a deep-drawn part. Such a realized bearing plate is characterized on the one hand by low production costs and on the other in large-scale production by low manufacturing tolerances. In contrast, it is preferred that the cooling ring or at least the grooves between the webs for the cooling channels are made erosive.

In a particularly preferred implementation of the invention, the housing has a cylindrical receiving portion with a free inner diameter, wherein the outer diameter of the assembly is formed at the end of the bearing plate smaller than the free inner diameter of the cylindrical receiving portion, so that the assembly can be inserted into the receiving portion , This embodiment allows easy assembly of the assembly in the housing.

In a preferred embodiment of the invention, the end of the assembly with the Bearing shield arranged in the axial direction as a movable bearing in the housing, which is not fixed, for example, to compensate for thermal changes in length of the cooling ring in the axial direction, but is mounted on a sliding seat. In particular, the bearing plate is designed as a so-called B-bearing plate.

It is particularly preferred if the bearing plate on the cooling ring and the cooling ring is supported on the housing, so that no direct contact between the bearing plate and housing is present. In this case, the bearing shield cooling ring assembly can be positioned very accurately over the large bearing surface of the cooling ring. After the end shield carries the rotor bearing, the exact positioning of the assembly also positions the rotor with low tolerances.

In a possible development of the invention, it is provided that the end shield, the cooling ring and the housing end flush on the front side. In this embodiment, the small axial size of the module is utilized, which can connect to the side of the bearing plate further component of the transmission device, in particular a transmission. Particularly preferably, the end face of the bearing plate is used as a contact surface for transmission parts.

In a preferred embodiment of the invention, the stator is fixed in the assembly, e.g. is arranged potted and thus forms part of the assembly. After the end shield has been assigned a seat for a rotor bearing as intended, the integration of the stator into the assembly ensures that the cooling ring, stator and rotor bearing and thus stator and rotor are arranged very precisely coaxially and concentrically with one another. This low-tolerance arrangement leads to use advantages of the transmission device, since, for example, friction, wear, etc. is minimized due to mounting tolerances. In particular, a casting of the stator with the cooling ring outside of the housing and thus manufacturing technology can be done comparatively easily.

Due to the integration of a preferably deep-drawn bearing plate in the cooling ring of the electric motor as a self-holding assembly, in particular welding assembly, axial and radial space is saved and a more accurate positioning of the stator to the rotor bearing seat achieved because stator and rotor bearing seat can possibly also be edited together, as this quasi are one-piece.

In a preferred embodiment of the invention, another bearing plate together with the assembly and the rotor shaft assembly form a self-holding preassembly assembly which is inserted into the housing. The preassembled assembly forms a module or cartridge that is inserted into the housing with a simple process step and, e.g. is connected via a screw with this. The advantages of the modular design arise not only in the first assembly, but also because in the repair of the transmission devices in the region of the electric motor, the pre-assembly can be easily removed from the housing and replaced.

In a preferred embodiment of the invention, the transmission device comprises the transmission, preferably designed as a differential, and is designed as an electromotive drive unit, an electric axle or as a superposition gear for a vehicle.

In an advantageous embodiment of the invention, the transmission device is designed as a compact overall assembly, which includes both the electric motor and the transmission. In particular, the transmission device is realized as a self-holding unit.

Further features, advantages and effects of the invention will become apparent from the following description of preferred embodiments of the invention and the accompanying figures. Showing:

1 a schematic longitudinal section through a transmission device as an embodiment of the invention;

2 in the same representation as the 1 a carrier assembly of the transmission device with graphically suppressed parts;

3 in the same representation as in the preceding figures, the carrier assembly of the transmission device in the preceding figure with further parts;

4 a schematic three-dimensional representation of the transmission device in the region of the electric motor from the preceding figures;

5 a schematic plan view of the front end plate of the electric motor of the transmission device of the preceding figures;

6 a schematic longitudinal section through the transmission device along the section line BB;

7 a schematic three-dimensional view of the cooling ring of the electric motor of the transmission device of the preceding figures;

8th a schematic three-dimensional representation of the front bearing plate of the electric motor of the transmission device of the preceding figures;

9 a schematic three-dimensional view of the housing of the electric motor of the transmission device of the preceding figures;

10 a schematic block diagram of a vehicle with the transmission device of the preceding figures.

The 1 shows a portion of a transmission device 1 with an electric motor 2 for a vehicle in a schematic longitudinal section through an axis of rotation 3 of the electric motor 2 or the transmission device 1 , The transmission device 1 is designed as an electric motor drive unit and can, for. B. in the following variants, as in 10 is illustrated in a block diagram:

The 10 shows a vehicle 100 with four wheels 101 with the electromotive transmission device 1 , wherein the transmission device 1 the electric motor 2 and a gearbox 106 includes. In a training as an electrical axis 102 puts the gear device 1 the main drive torque for the axle of the vehicle 100 exclusively by the electric motor 2 to disposal. In a training as a superposition or hybrid transmission 103 is the transmission device 1 formed, the driving torque of the electric motor 2 another drive torque, for example, another electric motor or an internal combustion engine, in particular as an auxiliary drive torque or main drive torque to be superimposed. In the embodiment as an electric differential, the driving torque of the electric motor becomes 2 selectively associated with an output, wherein the electrical differential as a longitudinal differential 104 or an axle differential 105 can be trained. By the dashed line in the 10 is symbolized that only one or any combination of transmission devices 1 in the vehicle 100 can be integrated.

Like in the 1 is shown, the electric motor comprises 2 a rotor shaft assembly 4 and a stator 5 which is coaxial and concentric with a hollow shaft section 6 the rotor shaft assembly 4 in a housing 7 are arranged. Thus, the hollow shaft section 6 coaxial and concentric in the electric motor 2 arranged. The rotor shaft assembly 4 is rotatable about the axis of rotation 3 in the case 7 stored, the stator 5 is in the case 7 stationarily or stationarily positioned.

The housing 7 has a cylindrical section 8th on, in which the electric motor 2 with respect to the axial extent along the axis of rotation 3 at least for the most part is arranged. In the cylindrical section 8th is between the stator 5 and the housing 7 a cooling ring 9 which is also coaxial and concentric with the stator 5 , Rotor shaft assembly 4 or to the cylindrical portion 8th is arranged.

The cooling ring 9 is formed as a sleeve and has on its radial outer side a plurality of in the circumferential direction about the axis of rotation 3 running bridges 10 on which on the inner surface of the housing 7 in the cylindrical section 8th abut, so that between the webs 10 and thus between the case 7 and the cooling ring 9 cooling channels 11 are formed. In the cooling channels 11 For example, a medium, in particular fluid, for example an oil or a coolant, for cooling the electric motor 2 be guided. The supply and removal of the fluid is in the 1 not shown. The cooling ring 9 and the housing are made of metal so that there is good thermal coupling with the fluid. On the radial inside, the cooling ring 9 a cylindrical surface. In the end areas is the cooling ring 9 opposite the housing 7 and the front end shield 12 sealed with gaskets.

End is the housing 7 on the left with a front end shield 12 and on the right with a rear end shield 13 closed. Front end shield 12 and rear end shield 13 each include a nozzle section 14 . 15 which extends into the interior of the housing 7 extends and which one seat 16 . 17 for a rotor bearing 18 . 19 provides.

During operation, the rotor shaft assembly rotates 4 around the axis of rotation 3 and is about the rotor bearings 18 . 19 with interposition of the end shields 12 . 13 opposite the housing 7 stored, with the rotor bearings 18 . 19 with their inner rings on the seats 16 . 17 arranged and rotatably with their outer rings with the rotor shaft assembly 3 are connected.

The rear end shield 13 is designed as a deep-drawn part and with the cooling ring 9 directly linked, as this in particular from the 2 results. The 2 shows in the same longitudinal section as the 1 an assembly 20 , which the cooling ring 9 and the rear end shield 13 includes. The rear end shield 13 is as one around the axis of rotation 3 formed rotationally symmetrical component and has starting from the axis of rotation 3 first the nozzle section 15 for receiving the rotor bearing 17 on. At the neck section 15 closes a first annular disc area 21 and in the axial direction offset a second annular disc area 22 on, with the first annular disc area 21 via a connecting piece section 23 connected is. The rear end shield 13 abuts with a radially outer region of the second annular disc region 22 in the radial direction against the cooling ring 9 , so that a cylindrical contact surface 24 as a joining surface between the cooling ring 9 and end shield 13 results. This design makes the rear end plate 13 over the cooling ring on the housing 7 supported.

The cooling ring 9 and the bearing plate 13 are used as joining partners via a weld 25 in the area of the contact surface 24 connected as joining surface cohesively. The joining between cooling ring 9 and end shield 13 For example, before inserting the module 20 in the case 7 respectively. After passing through the cooling ring 9 the location of the assembly 20 in the case 7 is fixed, it is possible the seat 17 for the rotor bearing 19 in the bearing plate 13 in relation to the cooling ring 9 and with respect to the case 7 very precise.

As can be seen in particular from the 3 results, the assembly includes 20 also the stator 5 which is in the assembly 20 over end potting compounds 26 potted is arranged. Thus, by the prefabrication of the assembly 20 the relative position between seat 17 , Stator 5 and cooling ring 9 be defined very precisely.

The 4 shows in a schematic three-dimensional representation of the area of the transmission device 1 with the electric motor 2 , where again the housing 7 as well as the bearing plate 12 can be seen.

In the front end shield 12 are a plurality of screw connections 28 . 29 arranged, the exact positioning of which is based on the 5 is explained, which is a schematic plan view of the end faces of the bearing plate 12 shows. The screw connections 28 . 29 can be divided into two groups, namely first screw connection 28 and second screw connection 29 are divided, which are arranged alternately or alternately in the direction of rotation. Due to the radial expansion of the screw heads in the screw connections 28 . 29 become two pitch diameter ranges 30 . 31 defined, wherein the first pitch diameter range 30 through the heads of the first screw connection 28 and the second pitch diameter range 31 through the screw heads of the second screw connection 29 are defined.

As can be seen from the illustration, overlap the first and the second pitch diameter range 30 . 31 , The overlap in the radial direction is designed so that at least 30%, preferably at least 50% of the area of the pitch circle diameter range 30 or 31 is designed as an overlap surface. By approximating the diameters of the pitch circle diameter ranges 30 . 31 is achieved that the radial extent of the end shield 12 kept low and thus also the radial space of the transmission device 1 kept small. Alternatively or additionally, the pitch diameter of the screw connections differ 28 and 29 less than the diameter of the head of the screw connections 28 or 29 ,

In the 5 two cut lines are shown, wherein the section line AA of the representation in the 1 equivalent. In this 1 it can be seen that the first screw connections 28 a connection between end shield 12 and a mounting flange 27 of the cooling ring 9 implement. Through the first screw connections 28 become bearing shield 12 and cooling ring 9 connected with each other.

The section BB through the second screw 29 is in the 6 represents, wherein components of the transmission device 1 such as the rotor shaft assembly 4 , were suppressed drawing. From this representation it can be seen that the second screw 29 the bearing plate 12 with the housing 7 couple, with the front end shield 12 and the case 7 screwed together. This takes the bearing plate 12 a double function, wherein parallel and independently of each other via the first screw connections 28 the cooling ring 9 and about the second screw connections 29 the housing 7 to the end shield 12 is screwed on. By the approximation of the pitch circle diameter ranges 30 and 31 the radial expansion is kept low.

The constructive implementation of the connection will be explained below. The 7 shows in a schematic three-dimensional representation of the cooling ring 9 , where it can be seen that this the mounting flange 27 for connection to the front end shield 12 as well as the footbridges 10 to form the cooling channels 11 having. In contrast to the other end shield 13 is the cooling ring 9 , especially the bars 10 , has been worked out by a removing process. The mounting flange 27 has mounting areas 32 on, in the threaded holes 33 for the first screw connections 28 are introduced. The attachment areas 32 alternate with recesses 34 from, through which the second screw connections 29 can be performed without the attachment areas 32 to collide. The attachment areas 32 are formed as fastening tabs, so that there is a wave-shaped profile in the axial direction in the circumferential direction, wherein attachment areas 32 and recesses 34 alternate.

In the 8th is the front end shield 12 shown in a schematic three-dimensional representation of its inside, where again the neck 14 It can be seen in the interior of the housing 7 protrudes. In the edge area are passage openings 35 . 36 introduced, the first or the second screw connections 28 . 29 are assigned, so that screws of the screw connections 28 . 29 through the passage openings 35 . 36 can be pushed through. Analogous to the pitch circle diameter ranges 30 . 31 in the cooling ring 9 are also the passage openings 35 . 36 arranged.

For the mounting flange 27 is a positive recording 37 in the bearing plate 12 introduced so that the cooling ring 9 is received positively in the direction of rotation. The contour of the picture 37 is also wavy. This allows the cooling ring 9 on the bearing plate 12 be screwed on and is at the bottom of the recording 37 flat on the bearing plate 12 at. In one of the recesses 34 of the cooling ring 9 Corresponding areas are the passage openings 36 arranged for the second screw, wherein the areas a contact surface 38 for the housing 7 define.

The housing 7 is in the 9 shown in a schematic three-dimensional representation, wherein it can be seen that to the cylindrical portion 8th a mounting flange 39 connects, in the threaded holes 40 for receiving the second screw 29 are introduced. On the inner circumference of the mounting flange 39 is a positive recording 41 for the mounting flange 27 of the cooling ring 9 brought in. During assembly, the front bearing plate is located 12 with the support surface 38 on the mounting flange 39 on and is with this over the second screw connections 29 connected. The cooling ring 9 and its mounting flange 27 are positively in the recording 41 added.

Functionally, the positive connection between the cooling ring 9 and end shield 12 a low-tolerance assembly of these two components safely. The positive mounting of the end shield 12 with the cooling ring 9 in the case 7 also ensures a low-tolerance installation.

Returning to the 1 It should be noted that the front end shield 12 , Cooling ring 9 , rear end shield 13 , Stator 5 , Rotor assembly 3 together a pre-assembly 42 form, which - like a cartridge - in the housing 7 pushed in and over the second screw 29 can be fixed. In this embodiment, it is particularly advantageous that the exact positioning of the preassembly assembly 42 via the coupling of the front bearing plate 12 to the housing 7 as well as by the installation of the cooling ring 9 to the housing 7 is fixed.

LIST OF REFERENCE NUMBERS

1

 transmission device

2

 electric motor

3

 axis of rotation

4

 Rotor shaft assembly

5

 stator

6

 Hollow shaft section

7

 casing

8th

 cylindrical section

9

 cooling ring

10

 Stege

11

 cooling channels

12

 (front) end shield

13

 (rear) bearing plate

14

 union section

15

 union section

16

 Seat

17

 Seat

18

 rotor bearing

19

 rotor bearing

20

 module

21

 first annular disc area

22

 second annular disc area

23

 Connection nipple portion

24

 contact surface

25

 Weld

26

 encapsulants

27

 mounting flange

28

 first screw connection

29

 second screw connection

30

 first pitch diameter range

31

 second pitch diameter range

32

 fixing areas

33

 threaded holes

34

 recesses

35

 Through openings

36

 Through openings

37

 admission

38

 contact surface

39

 mounting flange

40

 threaded holes

41

 admission

42

 Vormontageeinrichtung

100

 vehicle

101

 bikes

102

 electrical axis

103

 Superposition gearbox or hybrid transmission

104

 longitudinal differential

105

 axle differential

106

 transmission

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19841159 A1 [0003]
• JP 2005278319 A [0004]

Claims (11)

Transmission device ( 1 ) with at least one electric motor ( 2 ) for generating a drive torque for a vehicle ( 100 ), with a housing ( 7 ) for the electric motor ( 2 ), with a stator ( 5 ) for the electric motor ( 2 ), wherein the stator ( 5 ) in the housing ( 7 ) is arranged with a cooling ring ( 9 ) for the electric motor ( 2 ), whereby the cooling ring ( 9 ) between the stator ( 5 ) and the housing ( 7 ) and together with the housing ( 7 ) Cooling channels ( 11 ), and with a bearing plate ( 12 . 13 ) for the electric motor ( 2 ), characterized in that the end shield ( 12 . 13 ) and the cooling ring ( 9 ) as an assembly ( 20 ) which are in the housing ( 7 ) is arranged. Transmission device ( 1 ) according to claim 1, characterized in that the end shield ( 13 ) and the cooling ring ( 9 ) inseparable, preferably materially connected to each other, in particular welded together. Transmission device ( 1 ) according to claim 1 or 2, characterized in that the end shield ( 13 ) having a radially outer surface on a radially inner surface of the cooling ring ( 9 ) and / or that the joining surface ( 24 ) between end shield ( 13 ) and cooling ring ( 9 ) is formed as a cylindrical surface. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the weld is formed as a butt weld. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the end shield ( 13 ) is formed as a formed part, in particular as a deep-drawn part. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the housing ( 7 ) a cylindrical receiving portion ( 8th ) having a free inner diameter, wherein the outer diameter of the assembly ( 20 ) at the end of the end shield ( 13 ) smaller than the free inner diameter of the cylindrical receiving portion ( 8th ) is, so that the assembly can be inserted into the receiving portion. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the end of the assembly ( 20 ) with the end shield ( 13 ) as a floating bearing in the housing ( 7 ) is arranged. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the end shield ( 13 ), the cooling ring ( 9 ) and the housing ( 7 ) finish flush on the front side. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the stator ( 5 ) in the cooling ring ( 9 ), in particular potted, and a part of the assembly ( 20 ). Transmission device ( 1 ) according to one of claims 7 to 9, characterized in that a further end shield ( 13 ) together with the assembly ( 20 ), the stator ( 5 ) and a rotor shaft assembly ( 4 ) a self-retaining preassembly assembly ( 42 ) formed in the housing ( 7 ) is introduced. Transmission device ( 1 ) according to one of the preceding claims, characterized in that the transmission device ( 1 ) a gearbox ( 106 ) and as an electromotive drive unit, an electrical axis ( 102 ) or a hybrid transmission ( 103 ) is trained.

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