Drive unit and drive device

Abstract

The invention relates to a drive unit (1) having a first rotary electric machine (10) and a second rotary electric machine (20) and a first shaft (40) and a second shaft (41), the rotor of the first rotary electric machine (10) being connected in a rotationally fixed manner to the first shaft (40) and the rotor (21) of the second rotary electric machine (20) being connected in a rotationally fixed manner to the second shaft (41), wherein the drive unit (1) has a coupling element (4) for coupling the internal combustion engine (110), and wherein the two rotary electric machines (10, 20) as an electric drive system and the coupling element (4) are arranged spatially next to one another, and wherein the drive unit (1) has a first transmission stage (61), the drive unit (1) has a first transmission stage (71), which is formed by a first toothing (62) on or on the first shaft (40) and a first gear wheel (63) that meshes with the first toothing (62) of the first shaft, and wherein the drive unit (1) has a second transmission stage (71), which is formed by a second toothing, in particular an external toothing (47), on or on the second shaft (41) and a second gear wheel (82) that meshes with the toothing of the second shaft (41), the two transmission stages (61, 71) are arranged in a spatially adjacent arrangement between the electric drive system and the coupling element (4).

Description

Technical Field

[0001] The invention relates to a drive unit for a drive train of an electrically drivable motor vehicle, in particular a hybrid vehicle, and to a drive device. Background Art

[0002] Various drive units are known from the prior art, which are integrated into a drive device or drive train.

[0003] DE 11 2015 006 071 T5 discloses a hybrid vehicle drive train having: a generator capable of generating electric energy by using the power of an internal combustion engine; an electric motor driven by the electric energy to drive wheels; a housing accommodating the generator and the electric motor; and a power control unit for controlling the generator and the electric motor. The generator and the electric motor are arranged side by side on the same axis in the housing.

[0004] WO 2019 101 264A1 discloses a drive train for a hybrid vehicle. The drive train comprises a transmission input shaft, which is in an active relationship with a first electric machine and an internal combustion engine via a first sub-drive train to transmit torque, and the transmission input shaft is in an active relationship with a second electric machine via a second sub-drive train to transmit torque. The two electric machines are arranged coaxially and axially adjacent to each other.

[0005] US2016 / 0218584 A1 describes a control unit for controlling a motor, wherein the control unit is mounted on a housing of a drive unit comprising the motor. The drive unit comprises two motors, which are arranged coaxially and axially adjacent to each other.

[0006] EP 1502791 B1 and EP 1847411 B1 each disclose a hybrid transmission for a hybrid vehicle, the hybrid transmission having a plurality of rotating electric machines. The electric machines are arranged in a radially nested manner. Here, the radially outer rotating electric machines are designed as external rotor electric machines.

[0007] The integration of a drive unit having a plurality of rotating electrical machines in a drive device provided for a hybrid vehicle places stringent requirements on the installation space, in particular in the axial direction.

[0008] A drive device that is particularly short axially is advantageous in particular when using such a drive unit in a so-called front transverse arrangement in a motor vehicle, in which the rotary electric machine and the internal combustion engine serve as front drive devices and their respective axes of rotation are arranged transversely to the longitudinal direction of the motor vehicle.

[0009] In many conventional hybrid transmissions with two rotating electrical machines, there is the possibility of not only being able to drive purely electrically, but also to connect the internal combustion engine to the vehicle drive or vehicle drive shaft of the hybrid vehicle by means of a coupling element. The resulting series / parallel hybrid drive combines the driving characteristics of an electric vehicle with the range advantages of a vehicle driven by an internal combustion engine.

[0010] Such a hybrid drive can have one or two transmission steps from the internal combustion engine to the output and one transmission step from the rotating electrical machine to the output.

[0011] However, with a fixed transmission ratio, a significant increase in driving dynamics, which is required, for example, during acceleration, cannot occur without increasing the power of the internal combustion engine and / or the rotary electric machine. Summary of the invention

[0012] On this basis, the object of the present invention is to provide a drive unit and a drive device equipped with a drive unit which ensure an optimal, efficient operation in a cost-effective design and in a space-saving manner.

[0013] This object is achieved by a drive unit according to the invention in accordance with claim 1. Advantageous embodiments of the drive unit are given in dependent claims 2 to 9. In addition, a drive device having a drive unit in accordance with claim 10 is provided.

[0014] The features of the claims may be combined in any technically meaningful manner, wherein this may also be incorporated into the features of the following description and the drawings, including additional configurations of the invention.

[0015] The terms “axial” and “radial” in the present invention always relate to an axis of rotation of the drive unit, which axis of rotation corresponds to an axis of rotation of at least one rotating electrical machine which the drive unit comprises.

[0016] The invention relates to a drive unit for a drive train of an electrically driven motor vehicle, in particular a hybrid vehicle. The drive unit comprises a first rotating electrical machine and a second rotating electrical machine as well as a first shaft and a second shaft, wherein the rotor of the first rotating electrical machine is connected to the first shaft in a rotationally fixed manner and the rotor of the second rotating electrical machine is connected to the second shaft in a rotationally fixed manner.

[0017] The drive unit also has a coupling element for coupling the internal combustion engine, wherein two rotating electrical machines as the electric drive system on the one hand and the coupling element on the other hand are arranged in a spatially adjacent arrangement.

[0018] Furthermore, the drive unit comprises a first transmission stage formed by a first toothing at or on a first shaft and a gear meshing with the first toothing of the first shaft, and the drive unit comprises a second transmission stage formed by a second toothing at or on a second shaft, in particular an external toothing, and a second gear meshing with the toothing of the second shaft.

[0019] The connection to the internal combustion engine provided by the connection element can be an indirect connection, possibly via a vibration damper.

[0020] The side-by-side arrangement here refers to the arrangement of modules forming the rotating electrical machine or the electric drive system and the coupling element. However, the torque transmission path from these modules to the individual transmission stages is independent of the spatial arrangement sequence of the individual modules.

[0021] The first gear of the first transmission stage can be arranged on the countershaft. Two transmission stages allow the operating mode to be varied in terms of cycle consumption and in actual operation and thus to be designed to be more precisely adapted to the respective driving situation.

[0022] The drive unit is therefore a dual-motor transmission for series and parallel drive of a hybrid vehicle with two electric machines, wherein the first rotating electric machine can be used, for example, as a generator for supercharging and for starting the internal combustion engine, and the second rotating electric machine can be implemented, for example, as a traction motor or main driving motor and used for supercharging and energy recovery.

[0023] Furthermore, the drive unit can have a first isolating device, by means of which the first transmission stage can be deactivated.

[0024] In this case, the first decoupling device can be designed to interrupt a torque transmission path from the first gear wheel to the countershaft or to interrupt a torque transmission path from the first shaft to the first toothing.

[0025] This ensures that the second rotating electrical machine is decoupled from the driven unit, thereby avoiding unnecessary drag consumption in driving conditions where the second rotating electrical machine is not needed. This helps improve the efficiency of the system and reduce consumption.

[0026] One advantage of the drive unit is that not only a gear change from the second rotary electric machine to the output can be achieved, but also the first transmission ratio can be utilized in a corresponding switching logic when using the first decoupling device. For functional reasons, pure electric driving via the first transmission stage is not satisfactory, since the internal combustion engine must be dragged at the same time. However, the parallel operation of the internal combustion engine and the first rotary electric machine that can be achieved additionally allows supercharging and energy recovery by means of the first transmission stage.

[0027] Furthermore, the drive unit can have a second isolating device, by means of which the second transmission stage can be deactivated.

[0028] The second decoupling device can be provided to interrupt a torque transmission path from the second gear wheel to the intermediate shaft.

[0029] Here, the second decoupling device can be implemented on the intermediate shaft, for example, as a dog clutch.

[0030] At least one isolating device can also be arranged in a spatially adjacent arrangement between the electric drive system and the coupling element.

[0031] The drive unit can also have a disconnect clutch, by means of which the rotor of the first rotating electrical machine can be connected or coupled to the second shaft for torque transmission.

[0032] The separating clutch can be arranged to close or open a torque transmission path between the first shaft and the second shaft. The separating clutch can be a multi-disk clutch, for example.

[0033] The drive unit can include an operating system for operating the separating clutch.

[0034] Advantageously, the axes of rotation of the rotors of the rotating electrical machine are positioned coaxially with respect to one another.

[0035] In one embodiment, the first rotating electrical machine is arranged at least partially radially and axially in a space radially delimited by the second rotating electrical machine.

[0036] The design with rotating electrical machines nested within one another allows the integration of additional functions while reducing the overall length in order to meet the ever-increasing demands on efficiency and driving dynamics.

[0037] The radial nesting of the two rotating electrical machines results in the following advantage: when manufacturing the individual sheets of the rotor lamination stack and the stator lamination stack of the two rotating electrical machines from sheet metal by stamping, sheets of the rotor of the radially inner rotating electrical machine and sheets of the stator of the radially inner rotating electrical machine can be cut, and sheets of the stator of the radially outer rotating electrical machine and sheets of the rotor of the radially outer rotating electrical machine can also be cut.

[0038] The rotor of the radially outer rotating electric machine can be supported by a rotor support so that it is connected to the second shaft, and the rotor support is connected to the second shaft, wherein the rotor is connected to the rotor support in particular with a force fit and / or a form fit, and the rotor support is connected to the second shaft with a force fit and / or a form fit.

[0039] For the rotational support of the first shaft and / or the second shaft, the drive unit can have a central bearing or a central bearing unit, which is designed in one piece or in multiple pieces and by which the first shaft and / or the second shaft are supported on the housing of the drive unit. The rotor support of the radially outer rotating electric machine can be supported directly via the central bearing or indirectly via the second shaft on the central bearing. The central bearing is designed, for example, as a cylindrical roller bearing, a ball bearing or a radial thrust ball bearing.

[0040] It cannot be excluded that both the radially inner rotating electric machine and the radially outer rotating electric machine can be used to drive a motor vehicle equipped with a drive unit. For example, the radially inner rotating electric machine can be used to transmit torque to the input side of the drive unit, so that an internal combustion engine that can be connected to the input side can be started. Alternatively, one or both rotating electric machines can also provide torque and, together with the connected internal combustion engine, realize a hybrid operation of the drive unit.

[0041] In addition, the drive unit can include an internal combustion engine transmission stage, wherein the internal combustion engine transmission stage is formed by a coupling element of the drive unit including an internally meshing gear and a first shaft having an element including an external toothing, wherein the toothing of the internally meshing gear and the external toothing mesh with each other to transmit the rotational movement from the coupling element to the first shaft.

[0042] The first rotating electrical machine is accordingly coupled to the internal combustion engine via the internal combustion engine transmission stage.

[0043] In a structurally advantageous and space-saving embodiment, the two shafts are arranged coaxially. For this purpose, it is particularly provided that the second shaft is designed as a hollow shaft and the first shaft extends partially within the second shaft.

[0044] In particular, the first rotating electrical machine can be used for generator operation. That is, the radially inner rotating electrical machine can advantageously be operated as a generator. The rotor of the radially inner rotating electrical machine is designed to be relatively small and therefore has a smaller mass moment of inertia than the rotor of the radially outer rotating electrical machine.

[0045] Accordingly, the second rotating electrical machine can be used to drive the engine operation. This means that the radially outer rotating electrical machine can advantageously be used as a drive unit, since its rotor is relatively large and can generate a correspondingly large torque.

[0046] In another advantageous embodiment, it is provided that the rotor of the second rotating electrical machine is supported by a rotor support which is connected to the second shaft in a rotationally fixed manner. In particular, the rotor of the second rotating electrical machine is connected to the rotor support in a force-fitting and / or form-fitting manner, and the rotor support is connected to the second shaft in a force-fitting and / or form-fitting manner.

[0047] In embodiments in which the drive unit has a transmission, the second gear wheel can be coupled in a rotationally fixed manner to a countershaft of the transmission.

[0048] The transmission can include a differential in the output region. Here, the external toothing of the countershaft can mesh with the input gear of the differential, thereby realizing a differential gear stage.

[0049] The second shaft is therefore used here as a transmission input shaft and is operatively connected to the transmission so that the torque provided by the second shaft or the rotational movement achieved by the second shaft can be transmitted via the transmission to another transmission unit of the motor vehicle in an accelerated or decelerated manner, or can also be transmitted directly to the drive wheels of the motor vehicle.

[0050] Furthermore, the invention provides a drive device having a drive unit according to the invention and an internal combustion engine which is or can be coupled in a rotationally fixed manner to a rotor of a first rotating electrical machine by means of an output element of the internal combustion engine and a coupling element of the drive unit.

[0051] Two rotating electrical machines as an electric drive system on the one hand and a coupling element and an internal combustion engine coupled thereto on the other hand are arranged spatially next to each other.

[0052] The side-by-side arrangement here refers to the arrangement of modules forming the rotating electrical machine or the electric drive system and the coupling element. However, the torque transmission path from these modules to the individual transmission stages is independent of the order of the spatial arrangement of the individual modules.

[0053] During operation of a motor vehicle, in particular a hybrid vehicle, having a drive device according to the invention (the drive device comprises a drive unit according to the invention and an internal combustion engine), the following driving operating modes are realized, for example:

[0054] -Electric driving and energy recovery:

[0055] The separation clutch is open, whereby the second rotating electrical machine is decoupled from the first rotating electrical machine and the internal combustion engine. The second rotating electrical machine is thus controlled solely as a traction motor or as a generator. The internal combustion engine and the first rotating electrical machine are not in operation.

[0056] -Serial driving and charging:

[0057] The separation clutch is opened. The internal combustion engine is started by means of the first rotating electrical machine, wherein the internal combustion engine can drive the first rotating electrical machine and the first rotating electrical machine is thus controlled as a generator in order to charge the battery of the motor vehicle. The second rotating electrical machine is controlled as a traction electrical machine.

[0058] -Parallel hybrid drive, charging and supercharging:

[0059] The separation clutch is closed, whereby the first rotating electrical machine, the second rotating electrical machine and the internal combustion engine are coupled to one another. The motor vehicle is driven by means of the internal combustion engine and / or one or both rotating electrical machines. The two rotating electrical machines can be controlled as traction motors or as generators.

[0060] In another design scheme, the drive device also includes at least one wheel drive shaft, the wheel of the motor vehicle equipped with the drive device is arranged on the wheel drive shaft, and the wheel drive shaft is connected to the second shaft of the drive unit via the transmission of the drive unit, so that the rotational movement realized by the second shaft can be transmitted to the wheel drive shaft and the wheel through the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The invention is described in detail below with reference to the accompanying drawings showing preferred designs in the technical context involved. The invention is in no way limited by the schematic drawings, wherein it should be noted that the embodiments shown in the drawings are not limited to the dimensions shown. Therein is shown:

[0062] Figure 1 shows a schematic diagram of a drive device having a drive unit according to a first embodiment,

[0063] Figure 2 shows a schematic diagram of a drive device having a drive unit according to a second embodiment,

[0064] Figure 3 A schematic diagram showing a drive device having a drive unit according to a third embodiment, and

[0065] Figure 4 A schematic diagram of a drive device having a drive unit according to a fourth embodiment is shown. DETAILED DESCRIPTION

[0066] exist Figures 1 to 4 Schematic diagrams of a drive device 100 with a drive unit 1 are shown in each case.

[0067] All of the embodiments shown have the basic structure described below.

[0068] The drive unit 1 includes a first rotating electrical machine 10 , a second rotating electrical machine 20 , a first shaft 40 , and a second shaft 41 .

[0069] Furthermore, the drive device 100 comprises an internal combustion engine 110 and a vibration damper 101, wherein a driven element 111 of the internal combustion engine 110 is coupled to the vibration damper 101. The vibration damper 101 is also coupled to a coupling element 4 of the drive device 1, which serves as an input side 2 of the drive device 1. Thus, the internal combustion engine 110 is coupled to the drive device 1 via the vibration damper 101.

[0070] The coupling element 4 is coupled to the first shaft 40 , so that an internal combustion engine transmission stage 70 is formed between the coupling element 4 and the first shaft 40 .

[0071] The rotor 11 of the first rotating electrical machine 10 is connected to the first shaft 40 in a rotationally fixed manner, and the rotor 21 of the second rotating electrical machine 20 is connected to the second shaft 41 in a rotationally fixed manner. The rotor 11 of the first rotating electrical machine 10 is connected to the first shaft 40 in such a way that the rotor 11 of the first rotating electrical machine 10 is directly arranged on the first shaft 40. The rotor 21 of the second rotating electrical machine 20 is supported by a rotor support 30, and the rotor support 30 is connected to the second shaft 41.

[0072] The two shafts 40, 41 are coaxially arranged on a common rotation axis 6. The first rotating electrical machine 10 is arranged radially and partially axially in a space radially delimited by the second rotating electrical machine 20. Here, the first rotating electrical machine 10 is configured as an inner rotor motor, and the second rotating electrical machine 20 is configured as an outer rotor motor.

[0073] The disconnect clutch 50 of the drive unit 1 is connected with its input side 51 to the first shaft 40 and with its output side 52 to the second shaft 41. The disconnect clutch 50 is therefore used to transmit torque between the first shaft 40 and the second shaft 41. Accordingly, the torque transmission path between the rotor 11 of the first rotating electrical machine 10 and the rotor 21 of the second rotating electrical machine 20 can be opened or closed by means of the disconnect clutch 50.

[0074] The second shaft 41 is designed as a hollow shaft and the first shaft 40 extends partially radially inside the second shaft 41. The two shafts 40, 41 thus extend coaxially to one another, wherein the rotors 11, 21 of the two rotating electrical machines 10, 20 are arranged coaxially to one another and to the shafts 40, 41.

[0075] The first shaft 40 is connected to the intermediate shaft 81 via a first transmission stage with a first toothing 62 located on or on the first shaft 40 via a first gear wheel 63 , which meshes with the first toothing 62 of the first shaft 40 .

[0076] The second shaft 41 is connected to the intermediate shaft 81 via the second transmission stage 71. The intermediate shaft 81 extends parallel to the second shaft 41.

[0077] The intermediate shaft 81 is connected to the input element of the differential 80 of the drive unit 1 via the differential gear stage 72 for torque transmission. The differential 80 forms the output side 3 of the drive unit 1 .

[0078] The wheel drive shaft 103 forms the output part of the differential 80, and the wheels of the motor vehicle equipped with the drive device 100 should be arranged on the wheel drive shaft, so that the rotational movement realized by the first shaft 40 or by the second shaft 41 can be transmitted to the wheel drive shaft 103 and the wheels via the first transmission stage 61 or via the second transmission stage 71 and the differential transmission stage 72 and via the differential 80.

[0079] The torque provided by the internal combustion engine 110 is transmitted to the first shaft 40 of the drive unit 1 via the damper 101 and via the internal combustion engine transmission stage 70. If the separation clutch 50 is open, the torque of the internal combustion engine 110 is only transmitted to the rotor 11 of the first rotating electrical machine 10. In this way, the first rotating electrical machine 10 can be used to charge the battery in generator operation. Alternatively or additionally, the torque can be transmitted directly from the internal combustion engine to the output via the first transmission stage 61.

[0080] If the separator clutch 50 is closed, the torque provided by the internal combustion engine 110 is transmitted from the first shaft 40 to the second shaft 41 .

[0081] The torque of internal combustion engine 110 is transmitted from second shaft 41 via second gear stage 71 to intermediate shaft 81 and via differential gear stage 72 to differential 80. The torque reaches the wheels of the motor vehicle equipped with drive device 100 via differential 80 by means of wheel drive shafts 103.

[0082] When the separating clutch 50 is open, the torque that can be provided by the rotor 11 of the first rotating electric machine 10 is transmitted to the internal combustion engine 110 via the internal combustion engine transmission stage 70. When the separating clutch 50 is closed, the torque is transmitted to the differential 80 and to the wheel drive shaft 103 via the second transmission stage 71 and the differential transmission stage 72.

[0083] Regardless of the switching of the separating clutch 50 , the torque provided by the rotor 21 of the second rotating electrical machine 20 is transmitted to the differential 80 and the wheel drive shaft 103 via the second transmission stage 71 and the differential transmission stage 72 .

[0084] Drive device 100 can accordingly be operated in a plurality of driving operating modes.

[0085] Figure 1 The detailed structure of the transmission stages 61 , 70 , 71 , 72 is also shown.

[0086] The internal combustion engine transmission stage 70 is configured such that the coupling element 4 includes an internally meshing gear wheel 5, which meshes with an external toothing of the second axial end region 43 of the first shaft 40. The second shaft 41 also has an external toothing 47 at its second axial end region 45, by means of which the second shaft is engaged with a second gear wheel 82, wherein the second gear wheel 82 is arranged on the intermediate shaft 81 in a rotationally fixed manner, so that the second transmission stage 71 is configured between the second shaft 41 and the intermediate shaft 81. The external toothing 84 of the intermediate shaft 81 is engaged with a differential gear wheel 83 as an input element of the differential 80, thereby forming a differential transmission stage between the intermediate shaft 81 and the differential 80.

[0087] In other words, the present invention allows the second rotary electric machine 20 to be operated via the second transmission stage 71 without using the internal combustion engine transmission stage 70 assigned to the internal combustion engine for purely electric driving with the output.

[0088] Furthermore, the second rotating electrical machine 20 enables parallel operation of the internal combustion engine via the first gear stage 61 .

[0089] Reference is further made to the features of the drive device which lead to differences in the exemplary embodiments shown in the drawings.

[0090] Figure 1 and Figure 2 In the embodiment shown, the first decoupling device 85 is arranged on the intermediate shaft 81 and is configured such that the first gear wheel 63 is disengaged from the intermediate shaft 81 or is coupled to the intermediate shaft 81 .

[0091] Figure 3 and Figure 4 In the illustrated embodiment, the first decoupling device 85 is arranged on the first shaft 40 and is configured such that the torque transmission path between the first shaft 40 and the first toothing 62 is opened or closed.

[0092] Figure 2 and Figure 4 Also shown separately are second decoupling devices 86 , which are arranged on the intermediate shaft 81 and are configured to open or close a torque transmission path between the second gear wheel 82 and the intermediate shaft 81 .

[0093] exist Figures 1 to 4 It can be clearly seen that the first gear stage 61 and the second gear stage 71 and in different embodiments the two decoupling devices 85 , 86 are arranged spatially next to each other between the two rotating electrical machines 10 , 20 and the internal combustion engine 110 .

[0094] The implementation of the 2-speed hybrid transmission with nested rotating electrical machines according to the invention improves driving dynamics, for example during acceleration, on the one hand, and increases system efficiency, on the other hand, due to the increased number of possible operating modes. This is manifested in particular by the option of decoupling the second rotating electrical machine, which results in lower energy consumption of the vehicle during load cycles and in actual operation.

[0095] 2nd gear allows the transmission stage to be matched more specifically to the respective vehicle application and, depending on the selected transmission stage, the internal combustion engine can be coupled to the vehicle output at speeds below 50 km / h.

[0096] The following table lists the possible operating modes, where the entries "Drag" and "Disconnect" refer to:

[0097] Dragging: The rotating motor is not started, but is driven into rotation because the corresponding rotating shaft cannot be decoupled.

[0098] Disconnected: The rotating motor is not started and does not rotate together when it is disconnected from the corresponding rotating shaft.

[0099] Table 1: Operation Mode

[0100]

[0101] By means of the drive unit and the drive device according to the invention, an optimal and efficient operation can be ensured in a cost-effective design and in a space-saving manner.

[0102] Reference numerals list

[0103] 1 Driver

[0104] 2 Input side of the drive unit

[0105] 3 Output side of the drive unit

[0106] 4 Connecting elements of the drive unit

[0107] 5 Internally meshing gears of coupling elements

[0108] 6 Axis of rotation

[0109] 10. First rotating electrical machine

[0110] 11 Rotor of first rotating electrical machine

[0111] 12 Stator of first rotating electrical machine

[0112] 20 Second rotating electrical machine

[0113] 21 Rotor of the second rotating electrical machine

[0114] 22 Stator of the second rotating electrical machine

[0115] 30 Rotor support of the second rotating electrical machine

[0116] 40 First axis

[0117] 41 Second Axis

[0118] 42 first axial end region of the first shaft

[0119] 43 second axial end region of the first shaft

[0120] 44 first axial end region of the second shaft

[0121] 45 second axial end region of the second shaft

[0122] 46 External gear of the first shaft

[0123] 47 External gearing of the second shaft

[0124] 50 Release clutch

[0125] 51 Input side of the release clutch

[0126] 52 Output side of the release clutch

[0127] 53 Operating System

[0128] 60 Shell

[0129] 61 First gear stage

[0130] 62 First tooth

[0131] 63 First Gear

[0132] 70 Internal combustion engine transmission stage

[0133] 71 Second gear stage

[0134] 72 differential transmission stages

[0135] 80 Differential

[0136] 81 Intermediate shaft

[0137] 82 Second gear

[0138] 83 Differential gear

[0139] 84 External gearing of intermediate shaft

[0140] 85 First decoupling device

[0141] 86 Second decoupling device

[0142] 90 Central support unit

[0143] 91 Needle Roller Bearing

[0144] 92 Support bearing

[0145] 100 Drive unit

[0146] 101 Shock absorber

[0147] 110 Internal combustion engine

[0148] 111 Driven components of internal combustion engines

Claims

1. A drive unit (1) for an electrically drivable motor vehicle, comprising a first rotating electrical machine (10) and a second rotating electrical machine (20) and a first shaft (40) and a second shaft (41), in, The rotor of the first rotating electric machine (10) is connected to the first shaft (40) in a rotationally fixed manner, and the rotor (21) of the second rotating electric machine (20) is connected to the second shaft (41) in a rotationally fixed manner, wherein the drive unit (1) has a coupling element (4) for connecting to an internal combustion engine (110), and wherein the two rotating electric machines (10, 20) as an electric drive system on the one hand and the coupling element (4) on the other hand are arranged in a spatially adjacent arrangement, wherein the drive unit (1) has a first transmission stage (61) which is The first transmission stage is formed by a first toothing (62) at or on the first shaft and a first gear (63) meshing with the first toothing (62) of the first shaft, and the drive unit (1) has a second transmission stage (71), the second transmission stage is formed by a second toothing, in particular an external toothing (47), at or on the second shaft (41) and a second gear (82) meshing with the toothing of the second shaft (41), and the two transmission stages (61, 71) are arranged in a spatially side-by-side arrangement between the electric drive system and the coupling element (4).

2. The drive unit (1) according to claim 1, It is characterized in that The drive unit (1) has a first isolating device (85), by means of which the first transmission stage (61) can be deactivated.

3. The drive unit (1) according to claim 2, It is characterized in that The first decoupling device (85) is configured to interrupt a torque transmission path from the first gear (63) to the intermediate shaft (81), or the first decoupling device (85) is configured to interrupt a torque transmission path from the first shaft (40) to the first toothing (62).

4. Drive unit (1) according to any one of the preceding claims, It is characterized in that The drive unit (1) has a second isolating device (86) by means of which the second transmission stage (71) can be deactivated.

5. The drive unit (1) according to claim 4, It is characterized in that The second decoupling device (86) is configured to interrupt a torque transmission path from the second gearwheel (82) to the intermediate shaft (81).

6. The drive unit (1) according to any one of claims 2 to 5, It is characterized in that At least one of the decoupling devices (85, 86) is arranged in a spatially adjacent arrangement between the electric drive system and the coupling element (4).

7. Drive unit (1) according to any one of the preceding claims, It is characterized in that The drive unit (1) has a separation clutch (50), by means of which the rotor (11) of the first rotating electric machine (10) can be connected or is connected to the second shaft (41) to transmit torque.

8. Drive unit (1) according to any one of the preceding claims, It is characterized in that The first rotating electrical machine (10) is arranged at least partially in the radial direction and in the axial direction in a space radially defined by the second rotating electrical machine (20).

9. Drive unit (1) according to any one of the preceding claims, It is characterized in that The drive unit (1) comprises an internal combustion engine transmission stage (70), wherein the internal combustion engine transmission stage (70) is formed by a coupling element (4) of the drive unit (1) comprising an internally meshing gear (5) and a first shaft (40) having an element comprising an external toothing (46), wherein the toothing of the internally meshing gear (5) and the external toothing (46) mesh with each other to transmit a rotational movement from the coupling element (4) to the first shaft (40).

10. A drive device (100), comprising a drive unit (1) according to any one of claims 1 to 9 and an internal combustion engine (110), the internal combustion engine being coupled or capable of being coupled to the rotor (11) of the first rotating electric machine (10) in a rotationally non-rotatable manner by means of a driven element (111) of the internal combustion engine (110) and a coupling element (4) of the drive unit.

Images