Electric drive system for a motor vehicle

Abstract

Electric drive system (10) for a motor vehicle, comprising: - a first electrical machine (20) having a first rotor (22); - a second electric machine (28) having a second rotor (30); - a coupling gear (40) which is designed as a planetary gear and has a first element (42), a second element (44), a third element (46), a fourth element (48) and a fifth element (50); wherein the first rotor (22), the second rotor (30) and the coupling gear (40) are arranged coaxially to a drive axis (AA) of the electric drive system (10) defining an axial direction; - a first intermediate shaft (52); and - a second intermediate shaft (54), wherein the first intermediate shaft (52) and the second intermediate shaft (54) are arranged coaxially to an intermediate shaft axis (ZA) of the electric drive system (10) arranged parallel to and axially offset from the drive axis (AA); - a first output shaft (56); and - a second output shaft (58) arranged coaxially to the first output shaft (56), wherein the output shafts (56, 58) are arranged parallel and axially offset both to the drive axis (AA) and to the intermediate shaft axis (ZA), characterized in that the third element (46) is designed as a planet carrier, where - first planetary gears (P1), second planetary gears (P2) and third planetary gears (P3) are rotatably mounted on the planet carrier, - the first planetary gears (P1) permanently mesh with a first toothing of the first element (42); - the second planetary gears (P2) permanently mesh with a second toothing of the fifth element (50); - the respective third planetary gear (P3) permanently meshes with a respective one of the first planetary gears (P1) and with a fourth toothing of the fourth element (48) via a respective third toothing of the respective third planetary gear (P3); and - the respective third planetary gear (P3) permanently meshes with a respective one of the second planetary gears (P2) and with a sixth toothing of the second element (44) via a respective fifth toothing of the respective third planetary gear (P3).

Description

[0001] The invention relates to an electric drive system for a motor vehicle, in particular for a motor vehicle, according to the preamble of patent claim 1.

[0002] DE 10 2019 107 538 A1 discloses a torque vectoring transmission with a first drive shaft that is non-rotatably connected to a first sun gear of a spur gear differential. JP 2021 - 100 318 A also shows a torque vectoring-capable electric drive system for a motor vehicle with two coaxially arranged electric motors coupled to each other via a coupling gear. Coaxially arranged output shafts are each driven by the electric motors via parallel and axially offset intermediate shafts.

[0003] The object of the present invention is to provide an electric drive system for a motor vehicle and a motor vehicle with at least one such electric drive system, so that a particularly compact design, high operational reliability, and high performance of the electric drive system can be achieved. This object is achieved by an electric drive system having the features of patent claim 1. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims.

[0004] The starting point is an electric drive system for a motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car. This means that the motor vehicle in its fully manufactured state has the electric drive system and can be driven by means of the electric drive system, in particular purely electrically. The electric drive system has a first electric machine which has a first rotor. The first electric machine has a first stator, by means of which the first rotor can be driven and is thus rotatable about a first machine axis of rotation relative to the first stator. The electric drive system also has a second electric machine which has a second rotor.The second electric machine has a second stator, by means of which the second rotor can be driven and thus rotated about a second machine rotation axis relative to the second stator. In particular, the first electric machine can provide first drive torques for driving the motor vehicle, in particular purely electrically, via its first rotor. Furthermore, the second electric machine can provide second drive torques for driving the motor vehicle, in particular purely electrically, via its second rotor. The electric drive system also has a coupling gear, which is designed as a planetary gear.

[0005] The planetary gear is advantageously designed as a five-shaft planetary gear. This means that the coupling gear, i.e. the planetary gear, has at least five shafts rotatable about a rotational axis also referred to as the main axis of rotation relative to a housing of the drive system, namely a first shaft, a second shaft, a third shaft, a fourth shaft and a fifth shaft. The planetary gear also has a first element, a second element, a third element, a fourth element and a fifth element. In particular, it is provided that the first element is connected, in particular permanently, in a rotationally fixed manner to the first shaft, the second element is connected, in particular permanently, in a rotationally fixed manner to the second shaft, the third element is connected, in particular permanently, in a rotationally fixed manner to the third shaft and the fourth element is connected, in particular permanently, in a rotationally fixed manner to the fourth shaft. The fifth element is connected to a fifth shaft.

[0006] The respective element and the respective shaft to which the respective element is, in particular permanently and non-rotatably connected, can be formed separately from one another and, in particular permanently and non-rotatably connected to one another, or the respective element and the respective shaft to which the respective element is, in particular permanently and non-rotatably connected, are formed integrally with one another, i.e. made from a single piece and are thereby, in particular permanently and non-rotatably connected to one another. The planetary gear can in this case have exactly four shafts and accordingly exactly four elements. However, the planetary gear can also be formed as a five-shaft planetary gear, which has the aforementioned four shafts and the aforementioned four elements as well as additionally the fifth shaft and the fifth element which is non-rotatably connected to the fifth shaft.

[0007] The electric drive system also includes a first intermediate shaft and a second intermediate shaft. The intermediate shafts are provided in addition to the shafts of the coupling gear, so that the first intermediate shaft is a sixth shaft and the second intermediate shaft is a seventh shaft of the electric drive system.

[0008] In this case, it is particularly advantageous that the first rotor, the second rotor and the coupling gear are all arranged coaxially to a drive axis defining an axial direction of the electric drive system, the radial direction of which runs perpendicular to the axial direction of the electric drive system. The drive axis is an axis of rotation and is also referred to as the main axis of rotation, whereby the drive axis coincides with the main axis of rotation. Thus, the first rotor, the second rotor and the five shafts of the coupling gear are rotatable about the drive axis, i.e. about the main axis of rotation, relative to the aforementioned housing. The drive axis defines an axial direction of the electric drive system. In other words, the axial direction of the electric drive system, whose radial direction runs perpendicular to the axial direction of the electric drive system, runs along the drive axis.In particular, the drive axis is an imaginary axis which runs in particular along a first straight line or coincides with the first straight line.

[0009] In the electric drive system, the first intermediate shaft and the second intermediate shaft are arranged coaxially to an intermediate shaft axis of the electric drive system, which is arranged parallel to and offset from the drive axis. The first intermediate shaft and the second intermediate shaft are thus arranged coaxially to one another. The intermediate shaft axis is an imaginary second axis. In particular, the intermediate shaft axis is a further axis of rotation and is also referred to as the intermediate shaft axis of rotation, so that the first intermediate shaft and the second intermediate shaft are rotatable about the intermediate shaft axis of rotation, thus about the intermediate shaft axis relative to the housing. Very particularly, the intermediate shaft axis runs along a second straight line or the intermediate shaft axis coincides with the second straight line.The feature that the intermediate shaft axis is arranged parallel and offset from the drive axis means that the intermediate shaft axis is parallel to the drive axis and spaced from the drive axis. Thus, the second straight line is spaced from the first straight line and runs parallel to the first straight line. For example, the coupling gear is at least partially arranged in the housing. Furthermore, it is conceivable that the respective electric machine is at least partially arranged in the housing.

[0010] In order to be able to realize a particularly compact design of the electric drive system, it is provided in a manner known per se that the electric drive system has a first output shaft and a second output shaft which is arranged coaxially to the first output shaft.

[0011] The output shafts are provided in addition to the shafts of the coupling gear and in addition to the intermediate shafts, so that the first output shaft is an eighth shaft of the electric drive system and the second output shaft is a ninth shaft of the electric drive system. The output shafts are arranged coaxially to one another. The output shafts are arranged parallel and axially offset to both the drive axis and the intermediate shaft axis. In other words, the output shafts are arranged coaxially to an output shaft axis arranged parallel and axially offset to the drive axis and parallel and axially offset to the intermediate shaft axis, so that the output shafts are arranged coaxially to one another. The output shaft axis is a third axis of rotation and is thus referred to as the output shaft axis of rotation, wherein the respective output shaft is rotatable about the output shaft axis relative to the housing.The output shaft axis runs along a third straight line or coincides with the third straight line. The output shaft axis runs parallel to the drive axis and is spaced from the drive axis. Furthermore, the output shaft axis runs parallel to the intermediate shaft axis and is spaced from the intermediate shaft axis. This means that the third straight line runs parallel to the first straight line and is spaced from the first straight line, and the third straight line runs parallel to the second straight line and is spaced from the second straight line. In other words, the straight lines run parallel to each other in pairs, and the straight lines are spaced from each other in pairs. The intermediate shaft axis is also called the intermediate axis, and the output shaft axis is also called the output axis. The drive axis is an imaginary first axis that runs along the first straight line or coincides with the first straight line.The intermediate shaft axis is an imaginary second axis that runs along the second straight line or coincides with the second straight line. The output shaft axis is an imaginary third axis that runs along the third straight line or coincides with the third straight line. The invention enables a particularly compact arrangement of the shafts, the rotors, and the coupling gear. In particular, the coupling gear is designed or operable as an integrated differential gear, or the coupling gear can function, for example, as an integrated differential gear. Furthermore, the invention enables a particularly advantageous high level of functionality to be realized in a particularly space-saving and cost-effective manner.For example, a parking lock can be implemented, specifically in the form of an integrated central parking lock, so that, for example, by means of the parking lock in particular, both output shafts can be secured, i.e., fixed, in particular simultaneously, against rotation relative to the housing, thereby preventing, for example, the motor vehicle from rolling away undesirably. This is particularly advantageous when the motor vehicle is parked on or on a slope.

[0012] In order to be able to represent a particularly compact design of the drive system, it is provided according to the invention that the third element is designed as a planet carrier, also referred to as a web.

[0013] In order to achieve a particularly compact design and particularly advantageous functionality, it has proven particularly advantageous that, according to the invention, first planetary gears, second planetary gears and third planetary gears are rotatably mounted on the planet carrier. The first planetary gears permanently mesh with a first toothing of the first element. The second planetary gears permanently mesh with a second toothing of the fifth element. The respective third planetary gear permanently meshes, via a respective third toothing of the respective third planetary gear, with, in particular precisely, a respective one of the first planetary gears and with a fourth toothing of the third element. It is preferably provided that the respective first planetary gear meshes, in particular precisely, with a respective one of the third planetary gears, specifically via the respective third toothing.Furthermore, it is provided that the respective third planetary gear permanently meshes, in particular precisely, with a respective second planetary gear and with a sixth toothing of the second element via a respective fifth toothing of the respective third planetary gear. It is preferably provided that the respective second planetary gear meshes, in particular precisely, with a respective third planetary gear, specifically via the respective fifth toothing.

[0014] The feature that two elements, such as the respective first planetary gear, permanently mesh with the first element via the first toothing of the first element is to be understood as meaning that a switching element is not provided which can be switched between a meshing state in which the elements mesh with each other and a release state in which meshing of the elements is cancelled, but rather the elements mesh permanently, that is to say always or always with each other.

[0015] Preferably, it is provided that meshing of the respective first planetary gear with the second element, the third element, and the fourth element, and the fifth toothings of the third planetary gears is omitted. Preferably, it is provided that meshing of the respective second planetary gear with the first element, the second element, the third element, and the third toothings of the third planetary gears is omitted. Furthermore, it is preferably provided that meshing of the respective third planetary gear with the first element and the fourth element is omitted. This allows for a particularly compact design.

[0016] In order to be able to realize a particularly advantageous functionality in a particularly space-saving manner, it is provided in one embodiment of the invention that the first rotor is coupled or can be coupled to the first element in a torque-transmitting, in particular rotationally fixed, manner, bypassing the second element, the third element, the fourth element and, if a fifth element is included, the fifth element. It has proven particularly advantageous if the second rotor is coupled or can be coupled to the second element in a torque-transmitting, in particular rotationally fixed, manner, bypassing the first element, the third element, the fourth element and, if a fifth element is included, the fifth element. In particular, it can be provided that the first rotor is permanently torque-transmitting, bypassing the second element, the third element, the fourth element and, if a fifth element is included, the fifth element.in particular rotationally fixed, is coupled to the first element, i.e., is connected. Furthermore, it is conceivable that the second rotor is permanently coupled to the second element in a torque-transmitting manner, in particular rotationally fixed, bypassing the first element, the third element, the fourth element, and, if a fifth element is included, the fifth element. The feature that the rotor is or can be coupled to the first element in a torque-transmitting manner, in particular rotationally fixed, bypassing the second element, the third element, the fourth element, and, if a fifth element is included, the fifth element, is to be understood in particular as follows: With respect to a first torque flow, along which the respective first drive torque can be transmitted from the first rotor to the first element or is transmitted during operation of the drive system, the second element, the third element, the fourth element, and,If a fifth element is included, the fifth element is not arranged downstream of the first rotor and upstream of the first element in the first torque flow, so that the respective first drive torque on its way from the first rotor to the first element does not flow or stream from the first rotor to the first element via the second element, not via the third element, not via the fourth element, and not, if a fifth element is included, via the fifth element. Accordingly, the feature that the second rotor is coupled or can be coupled to the second element in a torque-transmitting manner, in particular in a rotationally fixed manner, bypassing the first element, the third element, the fourth element, and the fifth element, is to be understood as follows: With respect to a second torque flow,along which the respective second drive torque is transferable from the second rotor to the second element or is transferred during the aforementioned operation or a further operation of the drive system, the first element, the third element, the fourth element and, if a fifth element is included, the fifth element are not arranged downstream of the second rotor and upstream of the second element in the second torque flow, so that the respective second drive torque on its way from the second rotor to the second element does not flow or pass through the first element, the third element, the fourth element and, if a fifth element is included, the fifth element from the second rotor to the second element.

[0017] In order to be able to realize a particularly advantageous functionality in a particularly space-saving and cost-effective manner, a further embodiment of the invention provides that the electric drive system has a first spur gear pair, a second spur gear pair, a third spur gear pair, and a fourth spur gear pair. The first spur gear pair has a first gear that is connected, in particular permanently and in a rotationally fixed manner, to the fourth element, and a second gear that meshes with the first gear and, in particular permanently and in a rotationally fixed manner, to the first intermediate shaft. The second spur gear pair has a third gear that is connected, in particular permanently and in a rotationally fixed manner, to the third element or the fifth element, and a fourth gear that meshes with the third gear and, in particular permanently and in a rotationally fixed manner, to the second intermediate shaft.The third spur gear pair comprises a fifth gear, in particular permanently connected to the first intermediate shaft in a rotationally fixed manner, and a sixth gear meshing with the fifth gear and, in particular permanently connected to the first output shaft in a rotationally fixed manner. The fourth spur gear pair comprises a seventh gear, in particular permanently connected to the second intermediate shaft in a rotationally fixed manner, and an eighth gear meshing with the seventh gear and, in particular permanently connected to the second output shaft in a rotationally fixed manner. In particular, each gear is a respective spur gear.

[0018] Preferably, the respective electrical machine is a high-voltage component whose respective electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts.

[0019] In its fully manufactured state, the motor vehicle very preferably has at least one vehicle axle. In its fully manufactured state, the motor vehicle very preferably has at least or exactly two vehicle axles, namely the aforementioned vehicle axle as the first vehicle axle and a second vehicle axle. Each vehicle axle has at least or exactly two vehicle wheels, wherein the vehicle wheels of each vehicle axle are preferably arranged on opposite sides of the motor vehicle in the transverse direction of the motor vehicle. The vehicle wheels are ground contact elements by means of which the motor vehicle can be or is supported downwards on a ground in the vertical direction of the motor vehicle.If the motor vehicle is driven along the ground while being supported on the ground in the vertical direction of the motor vehicle via the ground contact elements, the ground contact elements roll, in particular directly, on the ground. In this case, one of the vehicle axles, for example, has the electric drive system. When reference is made below to the vehicle axle, this means, unless otherwise stated, the vehicle axle having the electric drive system. The vehicle wheels of the vehicle axle can be driven by means of the electric drive system, in particular purely electrically. When reference is made below to the vehicle wheels, this means, unless otherwise stated, the vehicle wheels of the vehicle axle having the electric drive system.For example, a first of the vehicle wheels can be driven by the first electric machine, i.e., by the first rotor, so that the first vehicle wheel can be driven by the respective first drive torque. For example, a second of the vehicle wheels of the vehicle axle having the electric drive system can be driven by the second electric machine, i.e., by the second rotor, so that the second vehicle wheel can be driven by the respective second drive torque. In particular, it can be provided that the first vehicle wheel can be driven by the first electric machine, i.e., by the first rotor, bypassing the second vehicle wheel.This means that, with respect to a third torque flow along which the respective first drive torque can be transmitted from the first rotor to the first vehicle wheel in order to thereby drive the first vehicle wheel, the second vehicle wheel is not arranged downstream of the first rotor and upstream of the first vehicle wheel in the third torque flow.

[0020] Furthermore, it is preferably provided that the second vehicle wheel can be driven by means of the second rotor, bypassing the first vehicle wheel. This means that, with regard to a fourth torque flow along which the respective second drive torque can be transmitted from the second rotor to the second vehicle wheel in order to thereby drive the second output wheel, the first vehicle wheel is not arranged downstream of the second rotor and upstream of the second vehicle wheel in the fourth torque flow. Thus, the respective first drive torque does not flow from the first rotor to the first vehicle wheel via the second vehicle wheel on its way from the first rotor to the first vehicle wheel, and accordingly, the respective second drive torque does not flow from the second rotor to the second vehicle wheel via the first vehicle wheel on its way from the second rotor to the second vehicle wheel.This allows for a particularly advantageous drive system for the motor vehicle. The first torque flow can, for example, be a component of the third torque flow. The second torque flow can, for example, be a component of the fourth torque flow.

[0021] When reference is made above and below to the axial direction, this means, unless otherwise stated, the axial direction of the electric drive system. When reference is made above and below to the radial direction, this means, unless otherwise stated, the radial direction of the electric drive system. In the context of the present disclosure, the feature “radially overlapping” is to be understood as follows: Two elements, in particular at least substantially rotationally symmetrical, are arranged radially, in particular with respect to one another, overlapping, in particular with respect to a common axis running, for example, in the radial direction of the drive system and / or in the radial direction of the drive system, if they are each arranged at least partially in a region of the same radial coordinates, in particular the same angular coordinates.The term "radial" refers to the radial direction of the electric drive system. In other words, the term "radial" refers to the radial direction of the electric drive system.

[0022] The feature “axially overlapping” is to be understood as follows: Two elements are arranged axially overlapping, in particular with respect to one another, with respect to a common axis, in particular running in the axial direction of the electric drive system, and / or in the axial direction of the electric drive system, if they are each arranged at least partially in a region of the same axial coordinates. In the context of the present disclosure, the term “axial” is to be understood as the axial direction of the electric drive system. In other words, the term “axial” means the axial direction of the electric drive system. In other words, “axial” refers to the axial direction of the electric drive system, and “radial” refers to the radial direction of the electric drive system.

[0023] In the context of the present disclosure, the feature that a first component is arranged radially within a second component is to be understood as meaning that the first component is arranged in a region of smaller radii than the second component, in particular with respect to the main axis of rotation. Furthermore, the feature that a first component is arranged axially within a second component is to be understood as meaning that in the installed position of the electric drive system, which assumes its installed position in the fully manufactured state of the motor vehicle having the electric drive system, and in particular with respect to straight-ahead travel of the motor vehicle, that is to say in particular when a steering system of the motor vehicle is set to cause the motor vehicle to travel straight ahead, the first component, which is arranged axially within the second component,is arranged on one side of the second component towards a centre of the motor vehicle, also referred to as the vehicle centre, thus the first component is arranged on a side of the second component pointing towards the centre of the motor vehicle, so that the first component is arranged further inwards, i.e. closer to the centre of the motor vehicle, than the second component, particularly when viewed in the transverse direction of the motor vehicle.

[0024] In the context of the present disclosure, the feature that two components are connected to one another in a rotationally fixed manner is to be understood as meaning that the components connected to one another in a rotationally fixed manner are arranged coaxially to one another and, in particular when the components are driven, rotate together or simultaneously about a component rotation axis common to the components, such as the main rotation axis, at the same angular velocity, in particular relative to a reference element, such as the housing. In other words, two elements are connected to one another in a rotationally fixed manner if they are arranged coaxially to one another, in particular with respect to their component rotation axis or with respect to a rotational symmetry axis, and if they are connected to one another in such a way that they always rotate at the same angular velocity.An element is connected to the housing in a rotationally fixed manner if it cannot be rotated relative to the housing.

[0025] The feature that two components are connected or coupled to one another in a torque-transmitting manner means that the components are connected or coupled to one another in such a way that torque can be transmitted between the components. If the components are connected or coupled to one another in a rotationally fixed manner, the components are also connected or coupled to one another in a torque-transmitting manner. Two components connected to one another in a torque-transmitting manner can thus be connected to one another in a rotationally fixed manner.Furthermore, it is conceivable for two components connected to one another in a torque-transmitting manner to be connected to one another via an intermediate transmission or coupling unit, so that torque can be transmitted between the components via the transmission or coupling unit, while the components are connected to one another in a torque-transmitting manner, although the components can be rotatable relative to one another. For example, such a coupling unit is the coupling gear. Furthermore, such a transmission unit can be the respective spur gear pair, which is also referred to as the respective spur gear stage or is designed as a respective spur gear stage.

[0026] The feature that two components are permanently connected or coupled to one another in a torque-transmitting manner does not mean that a switching element is provided that can be switched between a coupling state that connects or couples the components to one another in a torque-transmitting manner and a decoupling state in which no torque can be transmitted between the components via the switching element. Rather, the components are always and therefore permanently torque-transmitting, i.e., connected or coupled to one another in such a way that torque can be transmitted between the components. Thus, for example, one of the components can be driven by the other component, or vice versa.

[0027] In particular, the feature that two components are permanently connected or coupled to one another in a rotationally fixed manner is to be understood as meaning that a switching element is not provided which can be switched between a coupling state that connects or couples the components to one another in a rotationally fixed manner and a decoupling state in which the components are decoupled from one another and rotatable relative to one another, so that no torque can be transmitted between the components via the switching element. Instead, the components are always connected or coupled to one another, thus permanently connected or coupled to one another in a rotationally fixed manner. Furthermore, the feature that two components can be connected or coupled to one another in a rotationally fixed manner is to be understood as meaning that the components are assigned a switching element which can be switched between at least one coupling state and at least one decoupling state.In the coupled state, the components are connected or coupled to one another in a rotationally fixed manner by means of the switching element. In the uncoupled state, the components are decoupled from one another such that in the uncoupled state the components can be rotated relative to one another about the component rotation axis. The same applies to the feature that two components can be connected or coupled to one another in a torque-transmitting manner. Thus, for example, the feature that two components can be connected or coupled to one another in a torque-transmitting manner is to be understood as meaning that a switching element is assigned to the components, wherein the switching element can be switched between at least one connected state and at least one released state. In the connected state, the components are coupled or connected to one another in a torque-transmitting manner by means of the switching element such that torque can be transmitted between the components, in particular via the switching element.In the release state, the components are decoupled from each other, so that in the release state no torque can be transmitted between the components via the switching element.

[0028] The feature that two elements are formed in one piece with each other is to be understood as meaning that the elements are not formed separately from each other and connected to each other, but the elements are formed from a single piece and thus integrally, i.e. formed in one piece, so that the elements are formed by a body which is formed in one piece, thus formed from a single piece and thus integrally manufactured, which is designed as a monoblock.

[0029] A further embodiment is characterized in that, with regard to the axial direction of the electric drive system, thus in the axial direction of the electric drive system and thus viewed along the main axis of rotation, the first rotor, the first spur gear pair, the second spur gear pair, the fourth spur gear pair, the third spur gear pair and the second rotor are arranged one after the other, i.e. consecutively, in the order in which they are named.In other words, it is preferably provided that, with regard to the axial direction, i.e. along the main axis of rotation of the electric drive system, the first rotor, the first spur gear pair, the second spur gear pair, the fourth spur gear pair, the third spur gear pair, and the second rotor are arranged consecutively, i.e. one after the other, in the following order: the first rotor - the first spur gear pair - the second spur gear pair - the fourth spur gear pair - the third spur gear pair - the second rotor. Thus, in the axial direction of the electric drive system, the first spur gear pair is preferably connected to the first rotor, the second spur gear pair is connected to the first spur gear pair, the fourth spur gear pair is connected to the second spur gear pair, the third spur gear pair is connected to the fourth spur gear pair, and the second rotor is connected to the third spur gear pair.This allows the electric drive system to have a particularly small installation space requirement.

[0030] In order to be able to realize a particularly compact design of the electric drive system, it is provided in a further embodiment of the invention and as an alternative to the above that with regard to the axial direction of the electric drive system, that is to say in the axial direction of the electric drive system and thus viewed along the main axis of rotation, the first rotor, the first spur gear pair, the third spur gear pair, the fourth spur gear pair, the second spur gear pair and the second rotor are arranged in the order mentioned, thus in the order in which they are named, one after the other, that is to say one after the other.In other words, in order to achieve a particularly compact design, it is preferably provided that, with regard to the axial direction of the electric drive system, i.e. viewed in the axial direction of the electric drive system, the first rotor, the first spur gear pair, the third spur gear pair, the fourth spur gear pair, the second spur gear pair and the second rotor are arranged one after the other, i.e. one after the other, in the following order: the first rotor - the first spur gear pair - the third spur gear pair - the fourth spur gear pair - the second spur gear pair - the second rotor.Thus, it is preferably provided that in the axial direction of the electric drive system, the first spur gear pair is connected to the first rotor, the third spur gear pair is connected to the first spur gear pair, the fourth spur gear pair is connected to the third spur gear pair, the second spur gear pair is connected to the fourth spur gear pair, and the second rotor is connected to the second spur gear pair.

[0031] In order to keep the length of the drive system, also referred to as the axial length, particularly small, viewed along the main axis of rotation, and thus to be able to represent a particularly compact design, it is provided, for example, that the third spur gear pair and / or the fourth spur gear pair are arranged axially overlapping the coupling gear.

[0032] In order to be able to keep the axial length particularly short, a further embodiment of the invention provides for the third planetary gears to be designed as stepped planetary gears. Thus, for example, the third toothing and the fifth toothing have different diameters, in particular different pitch circle diameters and / or pitch circle diameters. In other words, it is preferably provided that the respective third toothing has a respective first pitch circle diameter and / or a respective first pitch circle diameter, and the respective fifth toothing has a respective fifth pitch circle diameter and / or a respective fifth pitch circle diameter. The respective second pitch circle diameter and / or pitch circle diameter is smaller or larger than the respective first pitch circle diameter and / or pitch circle diameter.

[0033] A further embodiment is characterized in that the first element is designed as a first sun gear, the second element as a second sun gear, the fourth element as a first ring gear, and the fifth element as a second ring gear of the coupling mechanism. This allows for particularly advantageous functionality to be realized in a particularly space-efficient manner.

[0034] Finally, it has proven particularly advantageous if the respective electrical machine is designed as an axial flux machine (AFM), also known as an axial flux motor. This allows for particularly high performance of the respective electrical machine to be achieved in a particularly space-efficient manner.

[0035] Particularly high functionality can be achieved in a particularly space-efficient manner by having the electric drive system with a parking lock, by means of which the third element can be connected in a rotationally fixed manner to the housing of the electric drive system, bypassing the first element, the second element, the fifth element, and the fourth element. Thus, the parking lock can be switched, for example, between a locked state and a released state. In the locked state, the third element is connected in a rotationally fixed manner to the housing by means of the parking lock, in particular in a form-fitting manner, bypassing the first element, the second element, the fifth element, and the fourth element.In the release state, the parking lock allows rotations of the third element about the main axis of rotation, i.e. about the drive axis, and relative to the housing, such that in the release state the third element can rotate about the drive axis relative to the housing. In the lock state, the parking lock is activated, i.e. switched on or engaged. In the release state, the parking lock is disengaged, i.e. deactivated or turned off. Thus, the following is provided in particular: With respect to a third torque flow, along which torques can be transmitted between the housing and the third element in the lock state of the parking lock, in order to thereby connect the third element to the housing in a rotationally fixed manner, the first element, the second element, the fifth element and the fourth element are not arranged in the third torque flow between the housing and the third element.If the parking lock is activated, the vehicle wheels, for example, are secured against rotation relative to the housing, in particular, they are connected to the housing in a rotationally fixed manner. If the parking lock is disengaged, i.e., in the released state, the respective vehicle wheel can rotate relative to the housing. Thus, in the locked state of the parking lock or due to the locked state of the parking lock, the motor vehicle can be secured against unwanted rolling away, especially if the motor vehicle is parked on a slope.The invention enables a particularly compact and advantageous arrangement and / or connection of the parking lock, which is particularly advantageous given that the electric machines, which are designed in particular as axially parallel drive units, can drive the vehicle wheels independently of one another, meaning that the first vehicle wheel can be driven by means of the first electric machine, bypassing the second vehicle wheel, and the second vehicle wheel can be driven by means of the second electric machine, bypassing the first vehicle wheel. In particular, the parking lock can be designed or arranged as a central parking lock. By means of the precisely one parking lock, in particular, the fifth element and, via this, the vehicle wheels, can be secured against rotation relative to the housing, whereby the motor vehicle can be secured particularly advantageously against undesired rolling away.

[0036] Generally speaking, for example, by means of the parking lock, that of the shafts of the coupling gear which is designed as a sum shaft of the coupling gear can be connected in a rotationally fixed manner to the housing, so that it is preferably provided that the third element, in particular permanently, is connected in a rotationally fixed manner to the sum shaft or forms the sum shaft.

[0037] The parking lock has, for example, a first locking element which is connected, in particular permanently, in a rotationally fixed manner to the third element and which is, for example, a first parking lock gear. Furthermore, the parking lock has, for example, a second locking element which is, for example, a claw or pawl. In particular, the pawl is also referred to as a locking pawl. The second locking element is movable, in particular pivotable, relative to the housing between at least one locking position and at least one release position. The locking position effects the locking state, and the release position effects the release state. In other words, in the locking position, the second locking element interacts, in particular in a form-fitting manner, with the first locking element, whereby, for example, the fifth element or the master shaft is connected in a rotationally fixed manner to the housing.In the release position, the second locking element does not interact with the first locking element in such a way that the fifth element or the summing shaft is connected to the housing in a rotationally fixed manner, so that in the release position the second locking element and the first locking element and thus the fifth element or the summing shaft are released for rotation relative to the housing and about the main axis of rotation (drive axis). Thus, in the release position, the third element or the summing shaft can rotate about the main axis of rotation relative to the housing. Preferably, one, in particular a single, actuator is provided, which is also referred to as a central actuator, wherein the second locking element can be moved relative to the housing between the locked position and the released position by means of the actuator. The parking lock can thus be implemented with only a small number of parts and is therefore particularly space-saving, cost-effective and weight-effective.

[0038] Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.

[0039] The drawing shows: Fig. 1 is a schematic representation of a first embodiment of an electric drive system for a motor vehicle; Fig. 2 is a schematic representation of a second embodiment of the electric drive system; and. Fig. 3 a schematic representation of a third embodiment of the electric drive system not falling under the wording of patent claim 1.

[0040] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0041] Fig. 1 shows a schematic representation of a first embodiment of an electric drive system 10 for a motor vehicle. The motor vehicle, not further illustrated here, which is also simply referred to as a vehicle and is preferably designed as a motor vehicle, in particular as a passenger car, has, in its fully manufactured state, the electric drive system 10 and at least or exactly two vehicle axles arranged consecutively in the longitudinal direction of the motor vehicle and thus one behind the other, namely a first vehicle axle and a second vehicle axle. For example, the electric drive system 10 is a component of the first vehicle axle. The respective vehicle axle has at least or exactly two respective vehicle wheels. The vehicle axle is in Fig. 1 is shown particularly schematically and designated 12. The vehicle wheels of the vehicle axle 12 are in Fig. 1 and designated 14 and 16. The respective vehicle wheels of the respective vehicle axle are arranged on opposite sides of the vehicle in the transverse direction of the vehicle. The transverse direction of the vehicle is in Fig. 1 by a double arrow 18. The vehicle wheel 14 is also referred to as the first vehicle wheel, and the vehicle wheel 16 is also referred to as the second vehicle wheel.

[0042] The electric drive system 10 has a first electric machine 20, by means of which the first vehicle wheel 14 can be driven, in particular by bypassing the second vehicle wheel 16. For this purpose, the first electric machine 20 has a first rotor 22 and a first stator 24, by means of which the rotor 22 can be driven and is thus rotatable relative to the stator 24. Via the rotor 22, the electric machine 20 can provide first drive torques for driving the first vehicle wheel 14. The electric drive system 10 also has a second electric machine 28, by means of which the second vehicle wheel 16 can be driven, in particular bypassing the first vehicle wheel 14. For this purpose, the second electric machine 28 has a second rotor 30 and a second stator 32, by means of which the rotor 30 can be driven and is thus rotatable relative to the stator 32.Via its second rotor 30, the second electric machine 28 can provide second drive torques for driving the vehicle wheel 16. From . Fig. 1 shows that the respective electrical machine 20, 28 is designed as an axial flux machine (AFM). The respective axial flux machine is also referred to as an axial flux motor.

[0043] Output torques result from the aforementioned drive torques of the electric machines 20, 28. A first output torque for driving the first vehicle wheel 14 is Fig. 1 by an arrow 26. A second output torque for driving the second vehicle wheel 16 is shown in Fig. 1 is illustrated by an arrow 34.

[0044] The electric drive system 10 also has a housing 36, wherein housing walls of the housing 36 are Fig. 1 are shown in dashed lines and designated 38. For example, the respective electric machine 20, 28 is each at least partially arranged in the housing 36. The respective rotor 22, 30 is rotatable relative to the housing 36.

[0045] The electric drive system 10 also has a coupling gear 40, which in the embodiment of the Fig. 1 is designed as a, in particular, precisely five-shaft planetary gear. This means that the five-shaft planetary gear has exactly five shafts, namely a first shaft W1, a second shaft W2, a third shaft W3, a fourth shaft W4, and a fifth shaft W5. Furthermore, the planetary gear, hence the coupling gear 40, has a first element 42, a second element 44, a third element 46, a fourth element 48, and a fifth element 50. In the first embodiment, the first element 42 is a first sun gear, the second element 44 is a second sun gear, the third element 46 is a planet carrier (also referred to as a carrier), the fourth element 48 is a first ring gear, and the fifth element 50 is a second ring gear of the coupling gear 40.The first element 42 is, in particular permanently, connected in a rotationally fixed manner to the first shaft W1, the second element 44 is, in particular permanently, connected in a rotationally fixed manner to the second shaft W2, the third element 46 is, in particular permanently, connected in a rotationally fixed manner to the third shaft W3, the fourth element 48 is, in particular permanently, connected in a rotationally fixed manner to the fourth shaft W4, and the fifth element 50 is, in particular permanently, connected in a rotationally fixed manner to the fifth shaft W5.

[0046] The drive system 10 also has a first intermediate shaft 52 as the sixth shaft and a second intermediate shaft 54 ​​arranged coaxially to the first intermediate shaft 52 as the seventh shaft of the drive system 10. It can be seen that the second intermediate shaft 54 ​​in the first embodiment is designed as a hollow shaft, which is penetrated, in particular completely, by the first intermediate shaft 52.

[0047] The first rotor 22, the second rotor 30, and the coupling gear 40 are all arranged coaxially with a drive axis AA of the electric drive system 10, which defines an axial direction of the drive system 10, the radial direction of which runs perpendicular to the axial direction of the drive system. The drive axis AA is a first axis of rotation and is also referred to as the drive axis of rotation, wherein the drive axis AA runs along a first straight line or coincides with the first straight line. The rotors 22 and 30, the elements 42, 44, 46, 48, and 50, and the shafts W1, W2, W3, W4, and W5 are all rotatable about the drive axis AA relative to the housing 36. Therefore, the drive axis AA is also referred to as the main axis or main axis of rotation, or the drive axis AA is a main axis of rotation of the drive system 10.

[0048] The intermediate shafts 52 and 54 are arranged coaxially to an intermediate shaft axis ZA, which is arranged parallel to and offset from the drive axis AA. The intermediate shaft axis ZA is a second axis of rotation and is also referred to as the intermediate shaft axis of rotation. The intermediate shaft axis ZA runs along a second straight line or coincides with the second straight line, wherein the second straight line runs parallel to the first straight line and is spaced from the first straight line. Thus, the intermediate shaft axis ZA runs parallel to the drive axis AA and is spaced from the drive axis AA. The intermediate shafts 52 and 54 are rotatable about the intermediate shaft axis ZA relative to the housing 36. Furthermore, the intermediate shafts 52 and 54 are arranged coaxially to one another.

[0049] In order to be able to realize a particularly high functionality of the drive system 10 in a particularly space-efficient manner, the drive system 10 has a first output shaft 56 as the eighth shaft and a second output shaft 58 as the ninth shaft of the drive system 10. The output shafts 56 and 58 are arranged coaxially to one another. Furthermore, the output shafts 56 and 58 are arranged parallel and offset from each other both to the drive axis AA and to the intermediate shaft axis ZA. In other words, the output shafts 56 and 58 are arranged coaxially to an output shaft axis ABA, which is arranged parallel and offset from each other both to the drive axis AA and to the intermediate shaft axis ZA. The output shaft axis ABA is a third axis of rotation and is therefore also referred to as the output shaft axis of rotation.The output shaft axis ABA runs along a third straight line or coincides with the third straight line, wherein the third straight line runs parallel to the first straight line and parallel to the second straight line and is spaced apart from both the first straight line and the second straight line. This means that the said straight lines are spaced apart from each other in pairs and run parallel to each other in pairs. The output shafts 56 and 58 are rotatable about the output shaft axis ABA relative to the housing 36.

[0050] Furthermore, in the first embodiment, it is provided that the first rotor 22 is permanently rotationally fixedly coupled to the first shaft W1 and the first element 42, bypassing the second element 44 and the second shaft W2, bypassing the third element 46 and the third shaft W3, bypassing the fourth element 48 and the fourth shaft W4, and bypassing the fifth element 50 and the fifth shaft W5. The second rotor 30 is permanently rotationally fixedly coupled to the second element 44 and the shaft W2, bypassing the first element 42 and the first shaft W1, bypassing the third element 46 and the third shaft W3, bypassing the fourth element 48 and the fourth shaft W4, and bypassing the fifth element 50 and the fifth shaft W5.The rotor 22 is permanently connected in a rotationally fixed manner to the shaft W1 and thus permanently connected in a rotationally fixed manner to the element 42 via the shaft W1, and the rotor 30 is permanently connected in a rotationally fixed manner to the shaft W2 and thus permanently connected in a rotationally fixed manner to the element 44 via the shaft W2.

[0051] The electric drive system 10 has, in particular, precisely four spur gear pairs, namely a first spur gear pair SP1, a second spur gear pair SP2, a third spur gear pair SP3, and a fourth spur gear pair SP4. The first spur gear pair SP1 has a first gear Z1 that is permanently connected in a rotationally fixed manner to the fourth shaft W4 and the fourth element 48, and a second gear Z2 that is permanently meshed with the first gear Z1 and permanently connected in a rotationally fixed manner to the first intermediate shaft 52. The second spur gear pair SP2 has a third gear Z3 that is permanently connected in a rotationally fixed manner to the fifth shaft W5 and the fifth element 50, and a fourth gear Z4 that is permanently meshed with the third gear Z3 and permanently connected in a rotationally fixed manner to the second intermediate shaft 54.The third spur gear pair SP3 has a fifth gear Z5 permanently connected in a rotationally fixed manner to the first intermediate shaft 52, as well as a sixth gear Z6, which in particular permanently meshes with the fifth gear Z5 and is permanently connected in a rotationally fixed manner to the first output shaft 56. The fourth spur gear pair SP4 has a seventh gear Z7 permanently connected in a rotationally fixed manner to the second intermediate shaft 54, as well as an eighth gear Z8, which in particular permanently meshes with the seventh gear Z7 and is permanently connected in a rotationally fixed manner to the second output shaft 58.

[0052] In Fig. 1, an axial region is designated E1, wherein the coupling gear 40 and the third spur gear pair SP3 and the fourth spur gear pair SP4 are arranged in the axial region E1. The spur gear pairs SP3 and SP4 are output stages of the drive system 10. It can be seen that both the third spur gear pair SP3 and the fourth spur gear pair SP4 are each arranged at least partially axially overlapping the coupling gear 40. Advantageously, one of the housing walls 38 is arranged perpendicular to the drive axis AA and axially between the third spur gear pair SP3 and the fourth spur gear pair SP4, such that the third spur gear pair SP3 and the fourth spur gear pair SP4 can each be mounted at least on one side in one of the housing walls 38.

[0053] As from Fig. 1, it is provided in the first embodiment that, with regard to the axial direction of the drive system 10 and thus along the drive axis AA, the first rotor 22, the first spur gear pair SP1, the second spur gear pair SP2, the fourth spur gear pair SP4, the third spur gear pair SP3 and the second rotor 30 are arranged one after the other, thus consecutively, in the following order: the first rotor 22 - the first spur gear pair SP1 - the second spur gear pair SP2 - the fourth spur gear pair SP4 - the third spur gear pair SP3 - the second rotor 30.

[0054] The drive system 10 also includes first planetary gears P1, second planetary gears P2, and third planetary gears P3. The planetary gears P1, P2, and P3 are rotatably mounted on the planetary carrier, thus on the third element 46. The first planetary gears P1 permanently mesh with a first toothing of the first element 42. The second planetary gears P2 permanently mesh with a second toothing of the fifth element 50. The respective third planetary gear P3 permanently meshes, via a respective third toothing of the respective third planetary gear P3, with, in particular precisely, a respective one of the first planetary gears P1 and with a fourth toothing of the fourth element 48.

[0055] The respective third planetary gear P3 meshes permanently with, in particular precisely, a respective one of the second planetary gears P2 and with a sixth toothing of the second element 44 via a respective fifth toothing of the respective third planetary gear P3. The respective third planetary gear P3 is designed as a respective stepped planetary gear.

[0056] In the first embodiment, the electric drive system 10 also has a parking lock 60, by means of which that of the shafts W1 to W5 of the coupling gear 40 can be connected in a rotationally fixed manner to the housing 36, which is designed as the summing shaft of the coupling gear 40. In the first embodiment, the third shaft W3 is designed as a summing shaft, so that in the first embodiment, the third shaft W3 and thus the third element 46 can be connected in a rotationally fixed manner to the housing 36 by means of the parking lock 60. In the axial direction of the drive system 10, the spur gear pairs SP3 and the rotor 30 are arranged consecutively in the following order: the third spur gear pair SP3 - the parking lock 60, the rotor 30. Thus, in the first embodiment, the parking lock 60 is arranged in the axial direction of the drive system 10 between the third spur gear pair SP3 and the rotor 30.

[0057] Fig. 2 shows a schematic representation of a second embodiment of the drive system 10. In the second embodiment, the first rotor 22, the first spur gear pair SP1, the third spur gear pair SP3, the fourth spur gear pair SP4, the second spur gear pair SP2 and the second rotor 30 are arranged one after the other in the axial direction of the drive system 10 in the following order: the first rotor 22 - the first spur gear pair SP1 - the third spur gear pair SP3 - the fourth spur gear pair SP4 - the second spur gear pair SP2 - the second rotor 30. Furthermore, the parking lock 60 in the second embodiment is arranged axially overlapping the coupling gear 40 in the axial direction of the drive system 10.

[0058] Fig. 3 shows a schematic representation of a third embodiment of the electric drive system 10 which does not fall under the wording of patent claim 1.

[0059] In the third embodiment, the coupling gear 40 is designed as a four-shaft planetary gear. This means that the planetary gear has exactly four shafts, namely the first shaft W1, the second shaft W2, the third shaft W3, and the fourth shaft W4. Furthermore, the planetary gear, thus the coupling gear 40, has the first element 42, the second element 44, the third element 46, and the fourth element 48.

[0060] The electric drive system 10 of the third embodiment also has the four spur gear pairs SP1, SP2, SP3, SP4. The first spur gear pair SP1 has the first gear Z1, which is permanently connected in a rotationally fixed manner to the fourth shaft W4 and the fourth element 48, and the second gear Z2, which in particular permanently meshes with the first gear Z1 and is permanently connected in a rotationally fixed manner to the first intermediate shaft 52. The second spur gear pair SP2 has the third gear Z3, which, unlike in the first embodiment, is permanently connected in a rotationally fixed manner to the third shaft W3 and the third element 46. The second spur gear pair SP2 further has the fourth gear Z4, which meshes with the third gear Z3 and is permanently connected in a rotationally fixed manner to the second intermediate shaft 54. Furthermore, the third embodiment has the third spur gear pair SP3 and the fourth spur gear pair SP4.

[0061] As from Fig.1, it is provided in the third embodiment that, with regard to the axial direction of the drive system 10 and thus along the drive axis AA, the first rotor 22, the second spur gear pair SP2, the first spur gear pair SP1, the third spur gear pair SP3, the fourth spur gear pair SP4 and the second rotor 30 are arranged one after the other, thus consecutively, in the order mentioned here.

[0062] The drive system 10 also includes the first planetary gears P1 and the third planetary gears P3. The planetary gears P1 and P3 are rotatably mounted on the planetary carrier, thus on the third element 46. The first planetary gears P1 permanently mesh with a first toothing of the first element 42. The respective third planetary gear P3 permanently meshes, in particular precisely, with a respective one of the first planetary gears P1 and with a third toothing of the second element 44 via a respective second toothing of the respective third planetary gear P3. List of reference symbols 10 electric drive system 12 vehicle axles 14 vehicle wheel 16 vehicle wheel 18 Double arrow 20 first electric machine 22 first rotor 24 first stator 26 Arrow 28 second electric machine 30 second rotor 32 second stator 34 Arrow 36 housings 38 Housing wall 40 coupling gears 42 first element 44 second element 46 third element 48 fourth element 50 fifth element 52 first intermediate shaft 54 second intermediate shaft 56 first output shaft 58 second output shaft 60 parking lock AA drive axle ABA output shaft axis E1 Axial area P1 first planet gear P2 second planet gear P3 third planet gear SP1 first spur gear pair SP2 second spur gear pair SP3 third spur gear pair SP4 fourth spur gear pair W1 first wave W2 second wave W3 third wave W4 fourth wave W5 fifth wave Z1 first gear Z2 second gear Z3 third gear Z4 fourth gear Z5 fifth gear Z6 sixth gear Z7 seventh gear Z8 eighth gear ZA intermediate shaft axle

Claims

[1] Electric drive system (10) for a motor vehicle, comprising: - a first electrical machine (20) having a first rotor (22); - a second electric machine (28) having a second rotor (30); - a coupling gear (40) which is designed as a planetary gear and has a first element (42), a second element (44), a third element (46), a fourth element (48) and a fifth element (50); wherein the first rotor (22), the second rotor (30) and the coupling gear (40) are arranged coaxially to a drive axis (AA) of the electric drive system (10) defining an axial direction; - a first intermediate shaft (52); and - a second intermediate shaft (54), wherein the first intermediate shaft (52) and the second intermediate shaft (54) are arranged coaxially to an intermediate shaft axis (ZA) of the electric drive system (10) arranged parallel to and axially offset from the drive axis (AA); - a first output shaft (56); and - a second output shaft (58) arranged coaxially to the first output shaft (56), wherein the output shafts (56, 58) are arranged parallel and axially offset both to the drive axis (AA) and to the intermediate shaft axis (ZA), characterized by , that the third element (46) is designed as a planet carrier, where - first planetary gears (P1), second planetary gears (P2) and third planetary gears (P3) are rotatably mounted on the planet carrier, - the first planetary gears (P1) permanently mesh with a first toothing of the first element (42); - the second planetary gears (P2) permanently mesh with a second toothing of the fifth element (50); - the respective third planetary gear (P3) permanently meshes with a respective one of the first planetary gears (P1) and with a fourth toothing of the fourth element (48) via a respective third toothing of the respective third planetary gear (P3); and - the respective third planetary gear (P3) permanently meshes with a respective one of the second planetary gears (P2) and with a sixth toothing of the second element (44) via a respective fifth toothing of the respective third planetary gear (P3). [2] Electric drive system (10) according to claim 1, characterized by , that - the first rotor (22) is coupled or can be coupled to the first element (42) in a torque-transmitting manner, bypassing the second element (44), the third element (46) and the fourth element (48); and - the second rotor (30) is coupled or can be coupled to the second element (44) in a torque-transmitting manner, bypassing the first element (42), the third element (46) and the fourth element (48). [3] Electric drive system (10) according to claim 1 or 2, characterized by : - a first spur gear pair (SP1) comprising a first gear (Z1) connected in a rotationally fixed manner to the fourth element (48) and a second gear (Z2) meshing with the first gear (Z1) and connected in a rotationally fixed manner to the first intermediate shaft (52); - a second spur gear pair (SP2) which has a third gear (Z3) connected in a rotationally fixed manner to the fifth element (50) and a fourth gear (Z4) which meshes with the third gear (Z3) and is connected in a rotationally fixed manner to the second intermediate shaft (54); - a third spur gear pair (SP3) comprising a fifth gear (Z5) connected in a rotationally fixed manner to the first intermediate shaft (52) and a sixth gear (Z6) meshing with the fifth gear (Z5) and connected in a rotationally fixed manner to the first output shaft (56); and - a fourth spur gear pair (SP4) which has a seventh gear (Z7) connected in a rotationally fixed manner to the second intermediate shaft (54) and an eighth gear (Z8) meshing with the seventh gear (Z7) and connected in a rotationally fixed manner to the second output shaft (58). [4] Electric drive system (10) according to claim 3, characterized bythat with regard to the axial direction, the first rotor (22), the first spur gear pair (SP1), the second spur gear pair (SP2), the fourth spur gear pair (SP4), the third spur gear pair (SP3) and the second rotor (30) are arranged one after the other in the following order: the first rotor (22) - the first spur gear pair (SP1) - the second spur gear pair (SP2) - the fourth spur gear pair (SP4) - the third spur gear pair (SP3) - the second rotor (30). [5] Electric drive system (10) according to claim 3, characterized bythat with regard to the axial direction, the first rotor (22), the first spur gear pair (SP1), the third spur gear pair (SP3), the fourth spur gear pair (SP4), the second spur gear pair (SP2) and the second rotor (30) are arranged one after the other in the following order: the first rotor (22) - the first spur gear pair (SP1) - the third spur gear pair (SP3) - the fourth spur gear pair (SP4) - the second spur gear pair (SP2) - the second rotor (30). [6] Electric drive system (10) according to one of the preceding claims, characterized by that the respective third planetary gear (P3) is designed as a respective stepped planetary gear. [7] Electric drive system (10) according to one of the preceding claims, characterized by that the first element (42) is designed as a first sun gear, the second element (44) as a second sun gear, the fourth element (48) as a first ring gear and the fifth element (50) as a second ring gear. [8] Electric drive system (10) according to one of the preceding claims, characterized by that the respective electrical machine (20, 28) is designed as a respective axial flux machine. [9] Electric drive system (10) according to one of the preceding claims, characterized by a parking lock 60 which is designed to connect the third element (46) in a rotationally fixed manner to a housing (36).

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