DE102011088669B4 - Drive device with an electric drive machine and with a parking brake - Google Patents

Abstract

Drive device (1) of a vehicle with at least one electric drive machine (2), with at least one transmission (3), with a differential (5) and with a parking lock, wherein a rotor shaft (2a) of the drive machine (2) via the transmission (3 ) is connected to transmit power to the differential (5) and from the differential (5) output shafts (28, 29) go out, and wherein the prime mover (2), the transmission (3), a clutch (4) and the differential (5) coaxially arranged in series next to each other and together have a rotation axis (10) as the main axis, and the transmission is designed as a planetary drive (3), wherein a connecting shaft of the planetary drive (3) with the rotor shaft (2a) of the electric drive machine (2) is connected , wherein by the parking lock a differential cage (25 ') is locked against rotation against the vehicle, while the parking brake a shift sleeve (11) and an actuator for the shift sleeve (11) have t, and while the shift sleeve (11) slidably and torsionally rigid to the vehicle and in a parking lock position (P) displaceable in the drive device (1) is arranged, and wherein in the parking lock position (P) by means of the shift sleeve (11) a form-fitting first torsionally rigid Actual connection between the differential cage (25 ') and the vehicle is activated by the shift sleeve (11) in the parking lock position (P) positively lockingly rotationally rigidly connected to the differential cage (25') and thereby the shift sleeve (11) by means of the actuating device (51) from this parking lock position (P) in a first shift position (N) and back into the parking brake position (P) or in a second shift position (D) is displaceable, wherein with the shift sleeve (11) in the first shift position (N), the first torsionally rigid Active connection is released and the shift sleeve (11) in the second switching position (D) is rotationally rigidly connected to at least one connecting shaft (7) of the planetary drive (3).

Description

Field of the invention

The invention relates to a drive device of a vehicle with at least one electric drive machine, with at least one transmission, with a differential and with a parking lock, wherein a rotor shaft of the prime mover is connected via the transmission with the differential power transmitting and emanating from the differential output shafts, said Parking lock a differential basket opposite the vehicle is locked against rotation.

Background of the invention

Parking locks are used in vehicles whose drive trains have the classic automatic converter transmissions or electromechanically actuated (automated) manual transmissions. Furthermore, the parking locks are used in drive trains with hybrid drives or in exclusively electric motor driven drive trains.

With the parking brake, the drive wheels of the vehicle are mechanically blocked when it is stationary. The parking position serves as protection against rolling away, not as a service brake. In parking lock mode, the vehicle is locked especially on slopes against unwanted rolling away. As a rule, the parking lock by switching to the position " P "Of the shift lever engaged. Some hybrid or electric vehicles can only be started from this position.

With the parking brake, a drive power transmitting and coupled to the driving vehicle transmission component is rigidly locked against twisting against the vehicle. Parking locks include actuators which actuate the lock and which are coupled to the shift lever in the vehicle, and a lock mechanism, of which e.g. in the operating state "P" a pawl is locked in a ratchet wheel.

The ratchet wheel is, for example, rotationally rigidly coupled to or formed on a shaft via which power can be transmitted to a vehicle wheel or to an axle with two driven vehicle wheels. The shafts are gear shafts, such as output shafts of a gearbox, or are sum shafts of planetary gears and differentials or drive shafts. The pawl is fixed to the vehicle, for example, relative to a housing of the transmission, pivotally mounted and latched spring loaded in the locking teeth.

US 5,396,968 A describes, for example, a drive device for a scooter, which has two electric motor drives and a differential in a housing which is fixed to the scooter. In the differential, the drive torques of the drives are distributed to two output shafts. The parking brake has a parking lock mechanism, which is formed, inter alia, a pawl and a parking lock gear. The parking lock wheel is welded to the differential cage. The pawl is fixed to the housing of the drive device. The parking lock can be engaged by operating the shift lever. In this case, the latch locks positively in the parking lock gear, whereby the differential cage and relative to the housing is fixed.

DE 10 2004 050 115 A1 shows a drive train of a hybrid vehicle with an internal combustion engine, a planetary gear, which is designed as a transfer case, a generator, with an electric motor drive, gear stages, a countershaft, an axle differential, lead from the output shafts to vehicle wheels, and with a parking lock mechanism. The respective gears of the respective gear stages are firmly seated on shafts. The internal combustion engine selectively drives the vehicle wheels and / or the generator via the transfer case. The drive power flows through the planet carrier of the transfer case to a ring gear of the transfer case, which is coupled to a gear of a first gear stage. From the first gear stage, the drive power of the internal combustion engine flows via the countershaft and via a second gear stage to the differential cage of the axle differential and from there to the vehicle wheels. Power of the electric motor drive is applied via a third gear stage on the countershaft. On the ring gear of the transfer case a parking lock gear is fixed. When the parking brake is engaged, a blocking mechanism acts positively on the parking lock gear, whereby the ring gear is fixed against rotation against the vehicle. With the ring gear thus the first gear stage and the countershaft are blocked. Since the countershaft is blocked, the third gear stage and the electric motor drive are also blocked. The countershaft also holds the second gear stage so that the differential cage is locked against rotation with the vehicle and the parking lock is activated.

The DE 10 2005 022 926 B3 describes a drive device for a vehicle with an electric machine, whose rotor shaft is connected via a gearbox with a differential, emanating from the Ablenkwellen and the Differenzialkorp is set via a parking lock, which can take on a shift sleeve multiple switching positions.

The DE 10 2009 030 978 A1 describes a direction of rotation reversing mechanism for a crank-CVT transmission, whose input shaft with the Output shaft of the crank CVT transmission is connected. About a switching device, the direction of rotation is reversed.

The DE 199 10 576 A1 describes a parking brake for a manual transmission with a rotatably mounted in a transmission housing output shaft and concentrically arranged on a parking lock gear locking teeth and a concentrically arranged counter-toothing.

Description of the invention

The object of the invention is to provide a compact electric motor drive unit with a simple mechanical parking lock.

The object is solved according to the subject of claim 1.

According to the invention, the parking brake actuator on a shift sleeve and an actuator for the shift sleeve. A shift sleeve is an annular member which may have claw or a clutch teeth in the manner of a dog clutch. The claws or the coupling teeth are formed on the front side of the component and / or on the inner or outer peripheral side. In addition, the shift sleeve can also be provided with friction surfaces, friction linings and / or with other positive locking elements.

The shift sleeve is arranged axially displaceable in a parking lock position in the drive device. The parking lock position is the position in which the vehicle wheels of a driven axle are held against rolling on the vehicle by means of the parking lock. Axial is rectified or parallel to axes of rotation of the rotor shaft of the electric drive machine. According to the invention, it is provided that the shift sleeve is arranged relative to the component displaceable but rotationally fixed to the vehicle and, for example via a serration or a splined connection rotationally rigid but slidably seated in or on the vehicle or on a component attached to the vehicle or on this is stored differently. An advantageous development of the invention provides that the component either fixed to a housing of the drive device or torsionally rigid or is part of the housing of the drive device.

In the parking lock position a form-fitting first torsionally rigid operative connection between the differential cage and the vehicle is activated by means of the shift sleeve. "Activated" means that the activation procedure for engaging the parking brake is / was initiated by the shift sleeve in the parking brake position or the parking lock is engaged directly. The latter means that the differential cage is held in a torsionally rigid manner to the vehicle via the shift sleeve, which corresponds to the design according to the invention. Active connection means either a direct positive engagement of the shift sleeve on the sum shaft or indirectly via a component or an assembly, via which (s) preferably a torsionally rigid connection alternatively a geared connection with the sum shaft can be produced. Torque-resistant or rotationally rigid means that both shafts are connected to one another in such a way that they are no longer rotatable relative to one another about the rotation axis but possibly both are rotatably coupled together around the rotation axis.

The parking lock is, for example, mechanically acting. This parking lock mechanism can also be triggered mechanically, electrically, pneumatically or hydraulically. The shift sleeve is displaceable by means of the actuator from a parking lock position in a first shift position and back to the parking lock position. In the first switching position, the first torsionally rigid operative connection is released.

According to the invention it is provided that the shift sleeve is torsionally rigid in positive engagement with a connecting shaft of the transmission, wherein the connecting shaft is rotationally rigidly operatively connected to the differential cage.

The shift sleeve is displaceable in the parking lock position and arranged torsionally rigid to a transmission element.

The parking lock mechanism is therefore relatively simple.

Furthermore, the invention provides that the shift sleeve in the first shift position is rotationally rigidly operatively connected to a connecting shaft of the transmission. If the shift sleeve is rotationally rigidly coupled in a switching position with a connecting shaft of the transmission and at the same time positively locking torsionally engages the housing of the drive device, the connecting shaft is fixed relative to the housing. When driven by the prime mover, one of the connecting shafts of the first planetary drive is driven in this switching position, another fixed rotationally fixed relative to the housing via the sliding sleeve and a connecting shaft drives the sum of the differential shaft.

As connecting shafts of planetary gears are considered ring gears, planetary carriers and sun gears. Drive shafts of the gearbox in general are power-transmitting shafts into which power is supplied via connection elements from outside or inside or from which power is taken from outside or inside. Connection elements are flanges, Gears, coupling elements or other services transmitting elements. The sum of the differential shaft is usually the differential cage, which may for example be designed as a planet carrier, alternatively a ring gear or a sun gear of a planetary differential. From the sum of the shaft either the sum of all torques is distributed to the output shafts or in the opposite direction, all moments are brought together at this. The sum wave accordingly has the applied in the differential maximum torques.

In the drive device according to the invention, a connecting shaft of a planetary gear of the transmission is connected to the rotor shaft of the electric motor, for example, another connection shaft is rotationally rigidly coupled to the differential cage of the differential and a further connection shaft can be positively engaged with the shift sleeve.

The classic differential is made up of a differential cage, differential bevel gears and output bevel gears. Differential bevel gears and output gears are rotatably mounted in the differential cage and are in meshing engagement with each other. The differential gears are rotatable about their own axis on bolts that are fixed to the differential cage. Each of the driven wheels is coupled to an output shaft, one of which is coupled axially to the left and the other axially to the right, each coupled to a driven vehicle wheel. The differential cage is the sum of the differential.

In a planetary differential (for example, transverse differential or axle differential), the sum shaft is preferably the planetary carrier. The differential gears are planet gears and the output gears are sun gears. A transfer case (longitudinal differential) may be constructed in the same way or may have as a sum shaft, for example, a ring gear. The differential gears in this case are the planet gears and the output gears / shafts are the planet carrier or a sun gear.

A preferred embodiment of the invention provides that the shift sleeve is at the same time form-fitting rotationally fixed with the sum of the differential shaft and the housing formed as a housing of the drive device is engaged. In this case, the sum of the differential shaft is fixed in relation to the housing torsionally rigid.

When the sum shaft is the differential cage of the differential, either the planet carrier of a planetary differential or the cage of a bevel gear differential, this is fixed relative to the housing, whereby the output shafts of the differential and thus the drive shafts of vehicle wheels are fixed.

Due to the advantageous characteristic characteristics of electric motor drives, the gear units of such drive units are often designed to be sufficiently one-or two-speed. The drive unit is equipped with a coupling with which the respective power transmitting connections are made separable within the transmission. In electric motor driven drive devices, a planetary drive is often used as the transmission.

GB 2 348 253 A shows a vehicle with a serial hybrid drive train. An internal combustion engine drives a generator which generates the necessary electrical energy for two electric drive machines of an electric motor driven drive unit. Drive power is generated with a first of the electric drive machines. The drive power is transmitted via a first planetary drive on a sum of a differential shaft and distributed from there to two connection shafts of the differential. Each of the connection shafts leads to a drive shaft, which is coupled to a drive wheel of the vehicle. By means of a clutch, two gears of the transmission are switchable, one for a direct and one for a reduced geared connection between the first electric drive machine and the differential. The shift clutch has a shift sleeve, which is externally provided with a first clutch toothing, which corresponds to a toothing of the first ring gear and which is permanently engaged with this. Furthermore, an inner second coupling toothing is formed on the sliding sleeve, which corresponds to a coupling toothing of the first planet carrier. In addition, gears of the sliding sleeve and a coupling tooth, which is fixed to the housing of the drive unit correspond.

For switching the direct power transmitting connection between the rotor shaft of the first drive machine and the differential cage is in the in GB 2 348 253 A shown arrangement, the shift sleeve axially displaced in one direction so that it engages with the second coupling teeth in the coupling teeth of the first planet carrier. Since the shift sleeve is in meshing with the ring gear simultaneously, the planet carrier is thus fixed positively on the ring gear. The planet gears are based on the ring gear and the sun gear and are blocked. Ring gear and planet carrier rotate at speeds of the sun gear and thus at speeds of the rotor shaft of the first drive machine. Since the planet carrier and the differential cage are interconnected, the differential is driven at drive speeds of the rotor shaft. To switch another gear is the shift sleeve axially displaced in the opposite direction and brought into meshing with the teeth fixed to the housing. The ring gear is thereby fixed to the housing. The sun gear drives the planetary gears, which mesh with the teeth of the ring gear and set the planet carrier in rotation at speeds that are lower than the drive speeds of the rotor shaft.

The advantage of the invention is with a view of the from GB 2 348 253 A or other known arrangements in that with one and the same shift sleeve either direct, over- or under-geared connections between the rotor shaft of the electrical motor designed as an electric motor and the differential can be made or that the differential cage of the differential or another designed as a sum wave Connection shaft of the differential relative to the housing can be set. In other words, with one and the same shift sleeve, a gear connection between the electric drive machine and the differential or the parking brake function can be realized. Separate actuating mechanisms for the parking brake are not necessary. Only one drive and one actuating mechanism are used to engage the parking brake and to switch a power transmitting connection.

An embodiment of the invention provides that the shift sleeve is slidably disposed in the first switching position and rotationally fixed to the vehicle. the shift sleeve can be displaced from the first shift position into a second shift position and back again into the first shift position, wherein the shift sleeve in the second shift position is operatively connected in a torsionally rigid manner to at least one connection shaft of the transmission. The first shift position, for example, a neutral position in which the shift sleeve is free of operative connections with the connecting shaft of the differential and the transmission. It is further provided that the shift sleeve is slidably disposed in the second shift position and torsionally rigid to the vehicle. A further embodiment of the invention relates to the actuating device which has an actuating mechanism which is coupled to one side with a drive and the other side with the shift sleeve, wherein the drive is preferably an electric motor but also works hydraulically or pneumatically.

Description of the drawings

1 shows a schematic representation of a drive device 1 with at least one electric drive machine 2 in the form of an engine, with at least one transmission 3 in the form of a first planetary drive 3 , with a clutch 4 and with a differential 5 and a second planetary drive 22 , The prime mover 2 , the first planetary drive 3 , the clutch 4 and the differential 5 are arranged coaxially in series with the main axes next to each other and have as a major axis together the axis of rotation 10 on.

The first planetary drive 3 has three connection waves 6 . 7 and 8th on. The first connection shaft 6 is a sun wheel 6a and is with rotor shaft 2a the prime mover 2 rotatably coupled. The second connection shaft 7 is a ring gear 7a , The third connection shaft 8th is a planet carrier 8a , At the planet carrier 8a is a set of first planet gears 9 rotatably received. From the planet wheels 9 is due to the distribution of these around the axis of rotation about the circumference 10 the rotor shaft 2a represented in the diagram only one.

The clutch 4 has a shift sleeve 11 , a drive 12 and an actuator 13 in the form of an actuating mechanism 13 for the shift sleeve 11 on. The sliding sleeve 11 is axially displaceable but rotationally fixed to this on a component 14 stored. The component 14 , which is for example a shift sleeve carrier is on a housing, not shown 15 firmly. The drive 12 is an electric motor, but may also be formed hydraulically or pneumatically acting. The rotor shaft 16 of the electric motor is via an angle drive 17 with a spindle 18 connected. The spindle 18 is rotatable on the housing 15 stored. On the spindle 18 sits a spindle nut 19 which by the drive 12 over the angle drive 17 and the spindle 18 is axially movable driven. At the spindle nut 19 grip with one end hinged a rocker arm 20 on which to the housing 15 supported joint 21 is tiltable. At the other end is the rocker arm 20 articulated with the sliding sleeve 11 coupled.

The differential 5 is a planetary differential. The planetary differential is from a set of second planet gears 23 and a set of third planet gears 24 , a second planetary carrier 25 as well as a second sun wheel 26 and from a third sun wheel 27 educated. The second planet carrier 25 is the differential basket 25 ' of the differential 25 and sum wave 39 , on the / the both the planetary gears 23 as well as the third planet wheels 24 are stored. Every second planetary gear 23 combs with the second sun gear 26 and at the same time with a third planetary gear 24 , There is also every third planetary gear 24 with the third sun wheel 27 in the tooth mesh. and each of the sun gears 26 and 27 is with an output shaft 28 or. 29 connected. The output shafts 28 and 29 are each with a vehicle not shown coupled, the output shaft 28 concentric through the rotor shaft 2a passed through.

The second planetary drive 22 has a set of fourth planet gears 30 , a ring gear 31 or an internal toothing 31 and a fourth sun gear 32 on. The third connection shaft 8th is about the second planetary drive 22 with the differential basket 25 ' operatively connected. This is the first planet carrier 8a rotation-resistant but together around the axis of rotation 10 rotatable with a connecting shaft of the second planetary drive 22 , with the fourth sun gear 32 connected. The fourth sun wheel 32 is in mesh with the fourth planetary gears 30 , which are located on the ring gear 31 or on the internal toothing 31 support. The ring gear 31 is on the case 15 lockable or the internal toothing 31 is on the case 15 firmly. Each of the fourth planet gears 30 is on a planetary bolt 34 stored, which at the differential cage 25 to one side and to another side to a third planet carrier 35 is supported.

The sliding sleeve 11 is an annular component, which is the axis of rotation 10 and part of the first planetary drive 3 circumferentially surrounds and inside, for example, with a longitudinally aligned splines 33 is provided. One with the spline 33 positive counter-wedge toothing 36 is at the first ring gear 7a formed outside. Another with the spline 33 or with another spline on the sliding sleeve 11 corresponding counter-spline 37 is at the third planet carrier 35 educated.

In the illustration after 1 is the shift sleeve 11 in a shift position D in which the spline 33 the shift sleeve 11 in the counter-spline 36 on the ring gear 7a positively engages. Because the shift sleeve 11 at the same time non-rotatably on the component 4 which to the housing 5 is fixed, is fixed, is the ring gear 7a against the component 4 or against the housing 5 Fixed in rotation. In this switching position, the first ring gear 7a kept rigid. Drive power of the electric drive machine 2 be over the rotor shaft 2a and thus over the first sun wheel 6a in the first planetary drive 3 brought in. The first planet wheels 9 run around the axis of rotation 10 around, whereby these at the internal toothing 7b of the first ring gear 7a support and thus the first planet carrier 8a around the axis of rotation 10 take it in rotation. The first planet carrier 8a takes the fourth sun gear 32 with which the fourth planetary gears 30 drives. The fourth planet wheels 30 run around the axis of rotation 10 around, based on the internal teeth 31 off, leaving the differential cage 25 ' over the planet bolt 34 around the axis of rotation 10 is dragged in rotation. From the differential basket 25 ' , the sum wave of the differential 25 is about the second and third planet gears 23 and 24 which differential gears of the differential 25 are on the sun gears 26 and 27 distributed.

The sliding sleeve 11 is by means of the drive 12 via the operating mechanism 13 from the switching position D in the direction of the arrow 38 axially displaceable in the switching position P.

2 schematically shows the in 1 illustrated drive device 1 , In this illustration is the shift sleeve 11 in the switching position P , Through the sliding sleeve 11 is a torsionally rigid connection between the housing 15 and the third planet carrier 35 made because of these via the spline 33 torsionally rigid with the housing 15 is connected and at the same time with the spline 33 in the counter-spline 37 intervenes. As the third planet carrier 35 over the planet pins 34 torsionally rigid with the sum wave 39 is the differential basket 25 ' of the differential 5 torsionally rigid against the housing 15 established.

The sliding sleeve 11 is by means of the drive 12 via the operating mechanism 13 from the switching position P in the direction of the arrow 38 ' axially in the switching position D displaceable. An alternative shows 3 , This illustration shows schematically how the over the drive 12 and the actuating mechanism 13 operated shift sleeve 11 from a neutral position N out either axially in the direction of the arrow 38 ' in the parking position P in positive engagement with an operative connection or in the direction of the arrow 38 in the position D in positive engagement with a connecting shaft 7 and can be moved back again. In the neutral position N is the shift sleeve 11 free from positive engagement with the connection shaft 7 a planetary drive and free from the torque transmitting active connection with a sum wave.

Without being subject to the invention describes 4 schematized with symbols a drive device 40 one with the item number 41 marked, otherwise not shown vehicle with at least one electric drive machine 42 , with at least one transmission 43 , with a differential 44 and with a parking lock 45 , A rotor shaft 46 the prime mover 42 is about the gearbox 43 with the differential 44 connected in a power-transmitting manner. From the differential 44 go output shafts 47 and 48 out. Through the parking lock 45 a differential basket 49 designed as a classic cone differential differential 45 opposite the vehicle 41 locked against rotation.

The parking lock 45 has a shift sleeve 50 and an actuator 51 for the shift sleeve 50 on. The sliding sleeve 50 is from a first switching position N in the direction of the arrow 52 in the picture to the right in a parking lock position P slidable in the drive device 40 arranged.

The sliding sleeve 50 has inside an axially aligned toothing 53 up, with a torsionally rigid at the differential cage 49 seated outer toothing 54 and with one on a connection shaft 55 of the transmission 43 rigidly formed external toothing 56 corresponds. Outside is the shift sleeve, for example, via a further toothing 64 torsionally positive fit on the housing 57 ,

In the parking lock position P is by means of the sliding sleeve 50 a form-fitting first torsionally rigid operative connection between the differential cage 49 and the vehicle 41 activated, including the sliding sleeve 50 with the teeth 53 into the gearing 54 engages, so that they correspond torsionally positive fit. The sliding sleeve 50 is repeated by means of the actuator 51 from the parking lock position P in the first switching position N and back to the parking lock position P displaceable. The first switching position N is a neutral position in which the torsionally rigid operative connection between the differential cage 49 and one to the vehicle 41 solid housing 57 is solved. In the neutral position is the shift sleeve 50 free of active compounds.

The sliding sleeve 50 is from the first switching position N in the direction of the arrow 58 in a second switching position D and back to the first gear position N displaceable and in the second switching position D torsionally rigid with at least the connecting shaft 55 of the transmission 43 operatively connected. In the second switching position is either a power flow between the electric drive machine 42 switched on or it can alternatively be changed in the power flow and a gear. Through the second switching position D a drive mode is effected, which depends on the design of the transmission.

The sliding sleeve 50 is both in the neutral position N as well as in the parking lock position P and in the second switching position D slidable and torsionally rigid to the vehicle 41 or housing 57 arranged.

actuator 51 is at least a hydraulic or pneumatic drive 60 , symbolized with a printing cylinder 61 with pistons 62 , a piston rod 63 and from a linkage 59 educated. The linkage 59 connects the sliding sleeve 50 with the piston rod 63 ,

LIST OF REFERENCE NUMBERS

1

driving device

2

electric drive machine

2a

rotor shaft

3

Gearbox / first planetary gear

4

clutch

5

differential

6

first connection shaft

6a

first sun gear

7

second connection shaft

7a

first ring gear

7b

internal gearing

8th

third connection shaft

8a

first planet carrier

9

first planetary gear

10

axis of rotation

11

shift sleeve

12

drive

13

Actuation device, mechanism

14

component

15

casing

16

rotor shaft

17

angle drive

18

spindle

19

spindle nut

20

rocker arm

21

joint

22

second planetary drive

23

second planet wheels

24

third planetary gears

25

second planet carrier

30

fourth planetary gear

31

second ring gear / internal toothing

32

fourth sun wheel

33

spline

34

planet shaft

35

third planet carrier

36

Against splines

37

Against splines

38

arrow

38 '

arrow

39

total wave

40

drive

41

vehicle

42

prime mover

43

transmission

44

differential

45

parking lock

46

rotor shaft

47

output shaft

48

output shaft

49

differential cage

50

shift sleeve

51

actuator

52

arrow

53

gearing

54

gearing

55

connecting shaft

56

gearing

57

casing

58

arrow

25 '

differential cage

26

second sun wheel

27

third sun wheel

28

output shaft

29

output shaft

59

linkage

60

drive

61

pressure cylinder

62

piston

63

piston rod

64

gearing

Claims (3)

Drive device (1) of a vehicle with at least one electric drive machine (2), with at least one transmission (3), with a differential (5) and with a parking lock, wherein a rotor shaft (2a) of the drive machine (2) via the transmission (3 ) is connected to transmit power to the differential (5) and from the differential (5) output shafts (28, 29) go out, and wherein the prime mover (2), the transmission (3), a clutch (4) and the differential (5) coaxially arranged in series next to each other and together have a rotation axis (10) as the main axis, and the transmission is designed as a planetary drive (3), wherein a connecting shaft of the planetary drive (3) with the rotor shaft (2a) of the electric drive machine (2) is connected , wherein by the parking lock a differential cage (25 ') is locked against rotation against the vehicle, while the parking brake a shift sleeve (11) and an actuator for the shift sleeve (11) have t, and while the shift sleeve (11) slidably and torsionally rigid to the vehicle and in a parking lock position (P) displaceable in the drive device (1) is arranged, and wherein in the parking lock position (P) by means of the shift sleeve (11) a form-fitting first torsionally rigid Actual connection between the differential cage (25 ') and the vehicle is activated by the shift sleeve (11) in the parking lock position (P) positively lockingly rotationally rigidly connected to the differential cage (25') and thereby the shift sleeve (11) by means of the actuating device (51) from this parking lock position (P) in a first shift position (N) and back into the parking brake position (P) or in a second shift position (D) is displaceable, wherein with the shift sleeve (11) in the first shift position (N), the first torsionally rigid Active connection is released and the shift sleeve (11) in the second switching position (D) is rotationally rigidly connected to at least one connecting shaft (7) of the planetary drive (3). Drive device after Claim 1 , in which the shift sleeve (11) in the first switching position (N) is free of active compounds. Drive device after Claim 1 or 2 in which the shift sleeve (11) from the first shift position (N) in the second shift position (D) and back to the first shift position (N) is displaceable.

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