Electric drive system for a motor vehicle and motor vehicle

Abstract

The invention relates to an electric drive system (10) having a housing (12); having at least one electric machine (14) with at least one rotor (20) that is rotatable relative to the housing (12); the invention relates to a parking lock for a motor vehicle, comprising a housing (12), a rotor (20), and a parking lock device (26), which has a locking toothing (28), which is arranged on the rotor (20) and thus can be rotated together with the rotor (20), and at least one pawl (36), which can be moved between a locking position and a release position relative to the rotor (20), the locking toothing (28) and the housing (12). In the locking position, the pawl (36) engages with the locking toothing (28), whereby the rotor (20) is fixed in a rotationally fixed manner relative to the housing (12). The pawl (36) is movable between a release position in which the pawl (36) is prevented from engaging with the locking tooth (28), whereby the pawl (36) releases the rotor (20) for rotation relative to the housing (12), the locking toothing (28) is arranged further outward than the pawl (36) in the radial direction of the electric drive system (10) and thereby of the motor (14), and wherein the teeth (64) of the locking toothing (28) protrude from the base body (G) in the axial direction of the motor (14).

Description

Technical Field

[0001] This invention relates to an electric drive system for a motor vehicle, particularly an automobile, as described in the preamble of claim 1. The invention also relates to a motor vehicle, particularly an automobile, having such an electric drive system. Background Technology

[0002] DE 10 2020 200 770 A1 discloses an electric drive unit for a motor vehicle, wherein the drive housing has an engine housing portion defining an engine compartment. A stator and a rotor are disposed within the engine compartment, the rotor being supported by a rotor shaft in a manner rotatable to the stator. Furthermore, the electric drive unit is configured to have a parking lock device with an engagement mechanism for locking the rotor shaft relative to the drive housing.

[0003] WO 2017 / 110 577 A1 discloses a vehicle drive system including two electric motors for independently driving the left and right drive wheels, two reduction gears for individually reducing the speed of the two electric motors and transmitting power to the left and right drive wheels, and a parking lock mechanism for blocking the two drive wheels.

[0004] DE 10 2017 217 469 A1 discloses a motor vehicle having a locking device for securing the motor vehicle to prevent rolling, wherein the locking device has a switchable first locking unit designed to lock a first wheel of the motor vehicle only according to a first direction of rotation, and a switchable second locking unit designed to lock a second wheel of the motor vehicle, different from the first wheel, only according to a second direction of rotation, and wherein the first locking unit is designed to prevent the motor vehicle from moving according to a first direction of travel by locking the first wheel according to the first direction of rotation, and the second locking unit is designed to prevent the motor vehicle from moving according to a second direction of travel opposite to the first direction of travel by locking the second wheel according to the second direction of rotation.

[0005] DE 10 2020 105 874 B3 discloses a braking device comprising a braking unit and a contact element movable relative to and capable of engaging with the braking unit. Summary of the Invention

[0006] The object of the present invention is to provide an electric drive system and a motor vehicle having such an electric drive system, which enables parking locking in a particularly advantageous manner.

[0007] This objective is achieved by an electric drive system having the features of claim 1 and a motor vehicle having the features of claim 9. Advantageous embodiments with suitable modifications of the invention are given in the remaining claims.

[0008] The first aspect of the invention relates to an electric drive system for a motor vehicle (also simply a vehicle), also called an electric drive unit and designed as such. This means that a motor vehicle, preferably designed as an automobile, particularly a passenger car, has this electric drive system in its fully manufactured state and can be electrically driven, particularly purely electrically driven, by means of this electric drive system. The electric drive system has a housing and at least one motor by means of which the motor vehicle can be electrically driven, particularly purely electrically driven. Specifically, the motor is at least primarily arranged in the housing. Particularly preferably, the motor is a high-voltage component, its voltage, particularly the operating voltage or nominal voltage, preferably greater than 50 volts, particularly greater than 60 volts, and particularly preferably several hundred volts. The motor has at least one rotor capable of rotating relative to the housing, particularly about a mechanical axis of rotation. For example, the motor has at least one stator by means of which the rotor can be driven and thus capable of rotating relative to the housing, particularly about a mechanical axis of rotation. In particular, the motor can provide driving torque for driving the motor vehicle via its rotor.

[0009] The electric drive system also includes a parking lock device with locking teeth disposed on the rotor and thus rotatable relative to the housing, particularly about the mechanical axis of rotation, together with the rotor. The locking teeth are also simply referred to as teeth or parking lock teeth. It is conceivable that the locking teeth are designed separately from the rotor, particularly from the rotor shaft, and are permanently connected to the rotor, particularly the rotor shaft, in a torsion-resistant manner. For example, the locking teeth are implemented by a parking lock wheel of the parking lock device, wherein it is conceivable that the parking lock wheel is designed separately from the rotor, particularly from the rotor shaft, and is connected to the rotor, particularly the rotor shaft, in a torsion-resistant manner, particularly permanently. The parking lock device, also simply referred to as a parking lock, also has at least one pawl movable, particularly pivotable, between a locked position and a released position relative to the rotor, relative to the locking teeth, and relative to the housing. Particularly preferably, the pawl is pivotable between the locked position and the released position relative to the rotor, relative to the locking teeth, and relative to the housing about a pivot axis. For example, the pivot axis extends parallel to the mechanical rotation axis, wherein the pivot axis is spaced apart from the mechanical rotation axis. For example, the pawl is fixed to the housing in a manner at least anti-torsional relative to the mechanical rotation axis, thereby preventing relative rotation between the pawl and the housing about the mechanical rotation axis. The locked position is a first position, or also referred to as the first position of the pawl, wherein the released position is a second position, or also referred to as the second position of the pawl. In the locked position, the pawl engages with the locking teeth, thereby the pawl interacting with the locking teeth in a form-fitting manner. Thus, the rotor is anti-torsional relative to the housing, particularly about the mechanical rotation axis, specifically preventing rotation of the rotor relative to the housing about the rotation axis in a first rotational direction, and also preventing rotation of the rotor relative to the housing about the rotation axis in a second rotational direction, thus the rotor is particularly connected to the housing in an anti-torsional manner. Therefore, the first and second rotational directions extend oppositely about the rotation axis, such that the second rotational direction is opposite to the first rotational direction. In the released position, the pawl does not engage with the locking teeth. This means that in the released position, the pawl does not engage with the locking teeth, thereby releasing the rotor to rotate relative to the housing about the mechanical axis of rotation. Specifically, in the released position, the rotor can rotate relative to the housing about the mechanical axis of rotation in a first rotational direction and / or a second rotational direction. The mechanical axis of rotation is also simply referred to as the axis of rotation. Therefore, in the locked position, the parking lock (parking locking device) is activated, i.e., inserted, and in the released position, the parking lock (parking locking device) is disengaged, i.e., deactivated.

[0010] For example, the rotor is torque-connected or capable of being connected to at least one wheel of the axle of a motor vehicle, wherein it is conceivable that the rotor is torque-connected or capable of being connected to at least or exactly two wheels of the axle. The wheel of the axle is a ground contact element through which the motor vehicle is supported downward or capable of being supported on the ground in the vehicle's vertical direction. If the motor vehicle travels along the ground, and the motor vehicle is supported downward on the ground in the vehicle's vertical direction via the ground contact element, then the ground contact element rolls on the ground, particularly directly on the ground. The wheel is also called a wheel, and the axle is also called an axle. Unless otherwise stated, when referring to a wheel above and below, it should be understood as the at least one wheel that is torque-connected or capable of being connected to the rotor. In the locked position, rotation of the wheel relative to the housing is prevented or can be prevented, thereby preventing undesirable rolling of the motor vehicle in or by means of the locked position, i.e., when or due to the insertion of the parking brake, which is particularly advantageous when the motor vehicle is parked, especially when parked on a slope. In the released position, the wheel can rotate relative to the housing, thereby allowing the motor vehicle to roll in the released position, and in particular, the rotor can drive the wheel in the released position and thus drive the motor vehicle.

[0011] In order to realize the parking lock device, i.e., parking, in a particularly space-saving and therefore particularly advantageous manner, especially by integrating it into the drive system, according to the invention, at least in the released position of the pawl, the locking teeth are arranged radially outside the pawl, particularly outside the entire pawl. This means that, at least in the released position, the locking teeth are arranged further outward than the pawl, particularly the entire pawl, in the radial direction of the electric drive system, and therefore further outward than the pawl, particularly the entire pawl, in the radial direction of the motor, whose axial direction is perpendicular to the radial direction and coincides with the mechanical rotation axis, so that, for example, the pawl can move outward from the released position to the locked position in the radial direction of the motor and therefore in the radial direction of the electric drive system. Conversely, the pawl, particularly the entire pawl, is arranged radially inside the locking teeth, at least in the released position, so that, at least in the released position, the pawl, particularly the entire pawl, is arranged further inward than the locking teeth, particularly the entire locking teeth, in the radial direction of the motor and therefore in the radial direction of the electric drive system. Therefore, the pawl is a radially inner pawl, thereby demonstrating a particularly space-saving arrangement and design of the parking lock.

[0012] To achieve a parking lock device in a particularly space-saving manner, embodiments of the invention specify that the pawl has an engagement region having or forming, for example, at least one or exactly one engagement tooth. This engagement region engages with the locking tooth in the locked position and is therefore arranged, for example, when viewed radially outward from the motor in the locked position, at least partially at the same height as the locking tooth, and, for example, partially extending radially outward from the locking tooth when needed. It is specified that in the released position, the entire pawl is radially arranged inside the locking tooth, while in the locked position, the entire pawl, except for the engagement region, is radially arranged inside the locking tooth. This allows the parking lock to be integrated into the drive system in a particularly space-saving manner.

[0013] If the axial direction is mentioned above and below, unless otherwise stated, it shall be understood as the axial direction of the motor and therefore the axial direction of the entire electric drive system. If the radial direction is mentioned above and below, unless otherwise stated, it shall be understood as the radial direction of the motor and therefore the radial direction of the electric drive system.

[0014] The unique feature of the further design is that the pawl extends in an arc shape, at least partially or only partially, around the axis of rotation of the motor and thus the entire drive system, thereby exhibiting a particularly compact structure for the parking lock device.

[0015] In a further, particularly advantageous embodiment of the invention, the parking locking device includes an actuator, for example, capable of being electrically, electromagnetically, hydraulically, or pneumatically operated, by means of which the pawl can be moved from at least one of the positions to another, and, for example, from the other position to the first position. Thus, the pawl can move between positions as needed and in a space-saving manner.

[0016] Here, it proves particularly advantageous that the actuator has a motor, for example designed as an electric motor. The actuator also has an actuating element that can be driven at least indirectly by the motor and thus can be translated relative to the housing, specifically along a movement axis. The movement axis extends, for example, in a plane perpendicular to or inclined to the axis of rotation of the machine, wherein it is particularly conceivable that the movement axis extends in the radial direction of the motor. Specifically, by driving the actuating element, the actuating element can be translated, i.e., displaced, relative to the rotor and / or relative to the locking teeth and / or relative to the pawl, specifically along the movement axis. Furthermore, the actuator has at least one lever, also called a switching lever, which in various cases can be movably, particularly pivotally, coupled to both the actuating element and the pawl, such that, due to the translational movement of the actuating element relative to the housing, specifically along the movement axis, the pawl can be moved from one position to the other via the lever and by means of the actuating element, through the movement of the lever relative to the pawl and relative to the actuating element. This allows the pawl to move in a particularly space-efficient manner.

[0017] The teeth of the locking gear protrude from the base, especially the base of the parking lock wheel, in the axial direction of the motor, thereby ensuring a particularly space-saving structure for the parking lock device.

[0018] A further unique aspect of the design of this invention is that the motor is designed as a radial flux motor, which allows for a particularly compact structure.

[0019] It has proven particularly advantageous that the rotor is designed as an external rotor, thus allowing for a particularly compact structure.

[0020] Finally, it has proven particularly advantageous that the motor rotor is a first rotor of the motor, which has a second rotor additionally provided in addition to the first rotor and connected to the first rotor in a torsional manner, particularly permanently. In particular, it can be envisioned that pawls are arranged between the motors when viewed in the axial direction of the motor.

[0021] In a further design, the aforementioned motor can be a first motor of a drive system, which, for example, has a second motor additionally provided in addition to the first motor. This second motor has, for example, a second stator and a second rotor. The second rotor can be driven by the second stator and therefore can rotate relative to the second stator about a second mechanical rotation axis. Preferably, the motors are arranged coaxially with each other such that their mechanical rotation axes coincide. For example, the rotors can rotate relative to each other, particularly about their respective mechanical rotation axes. In particular, it is conceivable that the pawl, viewed in the axial direction of the respective motor, is arranged between the first rotor of the first motor and the second rotor of the second motor, thereby enabling a particularly space-saving integration of the parking locking device. The description of the first motor, the first stator, and the first rotor above and below can logically be transferred to the second motor, the second stator, and the second rotor, and vice versa.

[0022] The parking lock device here, for example, has a second locking tooth disposed on the second rotor of the second motor and thus rotatable with the second rotor of the second motor, which is additionally provided in addition to the first locking tooth. For example, the parking lock device has a second pawl additionally provided in addition to the pawl that serves as the first pawl, which is movable, in particular, pivoting, relative to the rotor of the motor, relative to the locking tooth, and relative to the housing between a second locked position and a second released position. For example, the second pawl is pivotable about a second pivot axis relative to the second locked position and relative to the second released position, wherein the second pivot axis is spaced apart from the first pivot axis and the corresponding mechanical rotation axis, for example, extending parallel to the first pivot axis, and in particular parallel to the corresponding mechanical rotation axis. The description of the first pawl above and below can also be logically transferred to the second pawl, and vice versa. In the second locked position, the second pawl engages with the second locking tooth, thereby fixing the second rotor of the second motor against torsion relative to the housing, particularly about the second mechanical rotation axis. Specifically, in the second locked position, the second rotor of the second motor and the second pawl are connected to the housing in a torsion-resistant manner. In the second release position, the second pawl does not engage with the second locking teeth, thereby releasing the second rotor of the second motor to rotate relative to the housing, particularly about the second mechanical rotation axis. For example, it is preferably specified that, at least in the second release position, the second locking teeth are radially arranged outside the second pawl. This allows the parking lock to be implemented in a particularly space-saving manner.

[0023] The second aspect of the invention relates to a motor vehicle, also simply referred to as a vehicle, and preferably designed as an automobile, particularly a passenger car, and having an electric drive system according to the first aspect of the invention. The advantages and advantageous designs of the first aspect of the invention should be regarded as advantages and advantageous designs of the second aspect of the invention, and vice versa. Attached Figure Description

[0024] Further advantages, features, and details of the invention are set forth in the following description of preferred embodiments and with reference to the accompanying drawings. Without departing from the scope of the invention, the features and combinations thereof mentioned in the specification, and the features and combinations thereof mentioned and / or shown individually in the accompanying drawings, may be used not only in their respective combinations, but also in other combinations or individually.

[0025] In the attached diagram: Figure 1 A schematic cross-sectional view of an electric drive system for a motor vehicle is shown in part. Figure 2 Another schematic cross-sectional view of the drive system is shown in part; Figure 3 A schematic perspective view of the drive system is shown in partial view; Figure 4 A schematic exploded three-dimensional view of the drive system is shown in part. Figure 5 Another schematic perspective view of the drive system is shown in partial view; Figure 6 Another schematic perspective view of the drive system is shown in partial view; and Figure 7 Another schematic perspective view of the drive system is shown in partial view. Detailed Implementation

[0026] In the figure, the same or functionally identical elements have the same reference numerals.

[0027] Figure 1A schematic longitudinal sectional view partially illustrates an electric drive system 10 of a motor vehicle (also simply referred to as a vehicle). The drive system 10 has a housing 12, a first motor 14, and a second motor 16 additionally disposed on top of the first motor 14, wherein the respective motors 14 and 16 are designed as respective axial flux motors (AFM). The respective motors 14 and 16 are at least partially arranged within the housing 12. The motor 14 has a first stator 18, which is connected to the housing 12, for example, in an anti-torsional manner. The first motor 14 has a first rotor 20, which is driven by the stator 18 and therefore rotatable about a mechanical axis of rotation (also simply referred to as the axis of rotation) relative to the stator 18 and relative to the housing 12. The second motor 16 has a second stator 22, which is connected to the housing 12, for example, in an anti-torsional manner. Furthermore, the second motor 16 has a second rotor 24, which is driven by the stator 22 and therefore rotatable about the mechanical axis of rotation relative to the housing 12 and relative to the rotor 20. Motors 14 and 16 are arranged coaxially with each other, wherein rotors 20 and 24 are rotatable relative to each other. Each motor 14 and 16 can provide a corresponding drive torque via its respective rotor 20, 24, by means of which at least one wheel of an axle of a motor vehicle can be electrically driven, particularly purely electrically driven. For example, motor 14 can drive the first wheel of the axle via its rotor 20, and motor 16 can drive the second wheel of the axle via its rotor 24 around the first wheel, wherein motor 14 can drive the first wheel via its rotor 20 around the second wheel. The first wheel and the second wheel are also collectively referred to as drive wheels and are wheels of the same axle, wherein the drive wheels are the ground contact elements of the motor vehicle. For example, rotor 20 is permanently coupled to the first wheel in a torque-transmitting manner, or rotor 20 is capable of being coupled to the first wheel in a torque-transmitting manner. For example, rotor 24 is permanently coupled to the second wheel in a torque-transmitting manner, or rotor 24 is capable of being coupled to the second wheel in a torque-transmitting manner. It can be seen that rotors 20 and 24 are at least partially arranged within housing 12.

[0028] The drive system 10 has a parking lock device 26, also known as a parking lock. The parking lock device 26 has a first locking tooth 28 disposed at the first rotor 20 and thus rotatable relative to the housing 12 about a mechanical axis of rotation with the first rotor 20. This first locking tooth is, for example, formed by a first parking lock wheel 30 of the parking lock device 26. Further, the parking lock device 26 has a second locking tooth 32 disposed at the second rotor 24 and thus rotatable relative to the housing 12 about a mechanical axis of rotation with the second rotor 24. This second locking tooth is, for example, formed by a second parking lock wheel 34.

[0029] Combination Figures 2 to 7 It can be clearly seen that the parking locking device 26 also has a first pawl 36 associated with the first locking teeth 28 and a second pawl 38 additionally provided on top of the first pawl 36 and associated with the second locking teeth 32. The pawl 36 is pivotable relative to the rotors 20 and 24, relative to the housing 12, and relative to the locking teeth 28 and 32 about a first pivot axis S1 between a first locked position and a first released position. The mechanical rotation axis is... Figure 2 As can be seen in the diagram, and marked as D, the mechanical rotation axis D is perpendicular to... Figure 2 The image plane is shown. The second pawl 38 is pivotable relative to rotors 20 and 24, relative to locking teeth 28 and 32, and relative to housing 12 about a second pivot axis S2 between a second locked position and a second released position. It can be seen that the pivot axes S1 and S2 are spaced apart from each other and parallel to each other, wherein the pivot axes S1 and S2 are also spaced apart from and parallel to the mechanical rotation axis D. In particular, the corresponding pawls 36, 38 are supported at housing 12 in a manner that allows them to pivot relative to housing 12 about the corresponding pivot axes S1, S2, which in particular prevents relative rotation between housing 12 and the corresponding pawls 36, 38 about the mechanical rotation axis. In the corresponding locked positions, the corresponding pawls 36, 38 engage with their respective associated locking teeth 28, 32, such that in the first locked position, the first pawl 36 engages with the associated locking tooth 28, and in the second locked position, the second pawl 38 engages with the associated second locking tooth 32. When pawls 36 and 38 are in their locked positions, rotors 20 and 24 are connected to housing 12 in an anti-torsional manner, such that the respective rotors 20, 24 cannot rotate relative to housing 12 in either a first rotational direction about the mechanical rotation axis D or in a second rotational direction about the mechanical rotation axis D and opposite to the first rotational direction, particularly by more than 90 degrees, particularly 30 degrees, and especially particularly 10 degrees. In the first locked position, pawl 36 does not engage with locking tooth 32, and in the second locked position, pawl 38 does not engage with locking tooth 28. In the first released position, pawl 36 engages with neither locking tooth 28 nor locking tooth 32, and in the second released position, pawl 38 engages with neither locking tooth 28 nor locking tooth 32. Therefore, when pawls 36 and 38 are in their released positions, the respective rotors 20, 24 can rotate about the mechanical rotation axis D at least in the first rotational direction, and preferably also in the second rotational direction, preferably more than 360 degrees, and particularly preferably indefinitely. Therefore, in the locked position of pawls 36 and 38, the vehicle is fixed to prevent undesirable rolling, and in the released position of pawls 36 and 38, the vehicle can roll and is hereby specifically driven by the corresponding motors 14 and 16.

[0030] In order to implement the parking locking device 26 in a particularly space-saving manner, the locking teeth 28 are arranged radially outside the pawl 36 at least in the first release position, and the locking teeth 32 are arranged radially outside the pawl 38 at least in the second release position. Figure 2 It can be clearly seen that, at least in the released positions of pawls 36 and 38, locking teeth 28 and 32 are arranged radially outward, that is, outward in the radial direction of the respective motors 14 and 16, i.e., arranged further outward than pawls 36 and 38. Therefore, these pawls are radially built-in pawls 36 and 38. Thus, the respective pawls 36 and 38 can move outward from their respective released positions to their respective locked positions in the radial direction of the respective motors 14 and 16, the axial direction of which is perpendicular to the radial direction and coincides with the mechanical rotation axis D.

[0031] from Figure 2 and Figure 6 It can be clearly seen that the corresponding pawls 36 and 38 have corresponding engagement areas 40 and 42, which engage with the corresponding locking teeth 28 and 32 in the corresponding locked positions. Specifically, in the corresponding locked positions of the corresponding pawls 36 and 38, only the corresponding engagement areas 40 and 42 of the corresponding pawls 36 and 38 engage with the corresponding associated locking teeth 28 and 2, relative to the entire corresponding pawls 36 and 38. Here, for example, it is configured such that in the corresponding released positions of the corresponding pawls 36 and 38, the entire corresponding pawls 36 and 38 are arranged radially inside their respective associated locking teeth 28 and 32, wherein, for example, in the corresponding locked positions of the corresponding pawls 36 and 38, except for the corresponding engagement areas 40 and 42 of the corresponding pawls 36 and 38, the entire corresponding pawls 36 and 38 are radially inside their respective associated locking teeth 28 and 32.

[0032] from Figure 2 , Figure 6 and Figure 7 It can be clearly seen that the corresponding pawls 36 and 38 extend in an arc shape around the mechanical rotation axis D in the circumferential direction of the corresponding motors 14 and 16. Figure 2 The circumferential direction is indicated by double arrows 44.

[0033] The parking locking device 26 has an actuator 46, specifically an actuator shared by pawls 36 and 38, by means of which the respective pawls 36 and 38 can move from their respective release positions to their respective lock positions, and preferably also from their respective lock positions to their respective release positions. In particular, for example, pawls 38 and 36 can simultaneously move from their release positions to their lock positions, and for example, also from their lock positions to their release positions, by means of the actuator 46. For this purpose, the actuator 46 has a motor 48, designed, for example, as an electric motor, and an actuating element 50, also referred to as a first actuating element, which is specifically capable of translational movement relative to the housing 12 along a movement axis. The movement axis is located in... Figure 2 Designated 52, and in the embodiment shown in the figure, this moving axis extends in a plane perpendicular to the mechanical rotation axis D and therefore perpendicular to the axial direction of the respective motors 14, 16. The actuating element 50 is capable of being driven at least indirectly by means of the motor 48 and thus of translational movement relative to the housing 12 along the moving axis 52. The actuator 46 has a first lever 54 associated with the pawl 36 and a second lever 56 associated with the pawl 38. The motor 48 is a shared motor for both pawls 36 and 38, by which pawls 36 and 38 can be moved, in particular, simultaneously from the released position to the locked position, and preferably also from the locked position to the released position. Here, the actuating element 50 is a shared actuating element for both pawls 36 and 38, by which pawls 36 and 38 can be moved, in particular, simultaneously from the released position to the locked position, and preferably also from the locked position to the released position, by means of the motor 48. In each case, lever 54 is movably, particularly pivotally, connected to actuating element 50 and pawl 36, and lever 56 is movably, particularly pivotally, connected to pawl 38 and actuating element 50, thereby causing translational movement of actuating element 50 relative to housing 12 and along the movement axis 52. The corresponding pawls 36, 38 can move from their respective release positions, particularly pivoting, to their respective locked positions via their respective associated levers 54, 56, in the movement, particularly pivoting, of the respective levers 54, 56 relative to their respective pawls 36, 38 and relative to actuating element 50, and preferably conversely, from their respective locked positions, particularly pivoting, to their respective release positions. Figure 2 In the diagram, the first layer of levers 54 and 56 is represented by solid lines, and the second layer is represented by dashed lines. When pawls 36 and 38 are in the locked position, levers 54 and 56 are in the first layer; when pawls 36 and 38 are in their released position (disengaged), levers 54 and 56 are in the second layer. In the locked position, pawls 36 and 38 are engaged.

[0034] In the embodiment shown in the figure, the corresponding levers 54, 56 are connected to their respective associated pawls 36, 38 via corresponding flexible and therefore, for example, elastically deformable elements 58, 60, which are designed, for example, as springs, specifically as solids. For example, if the actuating element 50 moves by means of the motor 48 to engage the corresponding pawl 36, 38, that is, to move it from the corresponding released state to the corresponding locked state, but, for example, due to a so-called tooth-to-tooth position, the corresponding pawl 36, 38, for example, cannot move from its corresponding released position to its corresponding locked position, then the corresponding elements 58, 60, for example, undergo elastic deformation, and the corresponding pawl 36, 38, for example, remains in its corresponding released position. For example, if the respective rotors 20, 24 and their respective, associated locking teeth 28, 32 rotate a short distance relative to the housing 12 about the mechanical axis of rotation D (e.g., due to a short rolling of the vehicle or a short rotation of the corresponding wheel), the tooth-to-tooth position is released, and the previously elastically deformed elements 58, 60 can at least partially spring back, thus causing the respective pawls 36, 38 to move from their released position to their locked position. Due to the elastic deformation of elements 58, 60 during or through the tooth-to-tooth position, elements 58, 60 provide a spring force by which the respective pawls 36, 38 can be inserted due to the release of the tooth-to-tooth position, i.e., moved from their respective released positions to their respective locked positions. The tooth-to-tooth position should be understood, for example, as such that at least one tooth of the corresponding engagement region 40, 42, in particular, does not overlap with the corresponding tooth gap of the corresponding locking tooth 28, 32 in the radial direction of the corresponding motor 14, 16, but rather overlaps with the wall or tooth of the corresponding locking tooth 28, 32, thereby preventing the corresponding pawl 36, 38 from moving from the corresponding release position to the corresponding lock position.

[0035] As the tooth-to-tooth position is released or when the tooth-to-tooth position is released, the corresponding engagement regions 40, 42 or their corresponding teeth overlap with the corresponding tooth gaps of the corresponding locking teeth 28, 32 in such a way that the corresponding engagement regions 40, 42 or their corresponding teeth are overlapped outward in the radial direction by the corresponding tooth gaps of the corresponding locking teeth 28, 32, thereby allowing the corresponding pawls 36, 38 to move and engage with the corresponding locking teeth 28, 32.

[0036] Motor 48 is also called a regulating motor. For example, motor 48 and actuating element 50 are components of a screw drive (also called a screw adjuster), where, for example, actuating element 50 is designed as a threaded screw. From Figure 3 It can be seen particularly clearly that the housing 12 has, for example, a housing member 62 designed as an intermediate housing member, with pawls 36 and 38 held at the housing member in a pivotable manner.

[0037] Figure 4 An exemplary rotor 200 is shown with locking teeth 28, which extend, for example, circumferentially around the mechanical rotation axis D of the motor 14 and thus throughout the drive system 10 in the circumferential direction of the drive system 10 as a whole, and here have teeth 64 and backlash 68, which are arranged alternately one after another in the circumferential direction of the drive system 10, and are particularly uniformly distributed. Figures 5 to 7 The movement or mobility of the actuating element 50 along the moving axis 52, and the resulting movement of the rods 54 and 56 (especially those designed for pivoting movement), are particularly clearly visible. The housing 62 has a guide 66, for example specifically designed as a guide sleeve, which is specifically and completely penetrated by the actuating element 50. Figure 5 and Figure 6 In the middle, pawls 36 and 38 are in the released position. Figure 7 In this configuration, pawls 36 and 38 are in their locked positions. Specifically, it is conceivable that the corresponding elastically deformable and therefore flexible elements 58 and 60 are made of rubber, i.e., particularly of an elastomer. Furthermore, from... Figure 1 It can be clearly seen that pawls 36 and 38 are arranged in the axial direction of the respective motors 14 and 16 between rotors 20 and 24, particularly between parking lock wheels 30 and 34, the axial direction of which is indicated by double arrows 70 and coincides with the mechanical rotation axis D. Furthermore, for example, the respective teeth of the respective locking teeth 28 and 32 are configured to protrude from the respective bases G (particularly the bases of the respective parking lock wheels 30 and 34) in the axial direction of the respective motors 14 and 16, thereby axially orienting the respective teeth of the respective locking teeth 28 and 32.

[0038] List of reference numerals

Claims

1. An electric drive system (10) for a motor vehicle, having a housing (12), at least one electric machine (14) having at least one rotor (20) that can be rotated relative to the housing (12), and a parking lock (26) having a locking toothing (28) that is provided on the rotor (20) and thus can be rotated with the rotor (20) and at least one pawl (36) that can be moved relative to the rotor (20), the locking toothing (28) and the housing (12) between: - a locking position as a first position, in which the pawl (36) engages with the locking toothing (28), whereby the rotor (20) is fixed against rotation relative to the housing (12); and - a release position as a second position, in which the pawl (36) does not engage with the locking toothing (28), so that the pawl (36) releases the rotor (20) for rotation relative to the housing (12); characterized in that at least in the release position, the locking toothing (28) is arranged further out in the radial direction of the electric drive system (10) and thus in the radial direction of the electric machine (14) than the pawl (36), and teeth (64) of the locking toothing (28) protrude in the axial direction of the electric machine (14) from a base body (G).

2. The electric drive system (10) according to claim 1, characterized in that the pawl (36) has an engagement region (40) that engages with the locking toothing (28) in the locking position, wherein: - in the release position, the entire pawl (36) is arranged radially inside the locking toothing (28); and - in the locking position, the entire pawl (36) is arranged radially inside the locking toothing (28) except for the engagement region (40).

3. The electric drive system (10) according to claim 1 or 2, characterized in that the pawl (36) extends at least partially in the circumferential direction (44) of the electric machine (14) in an arc shape.

4. The electric drive system (10) according to any of the preceding claims, characterized in that an actuator (46) by means of which the pawl (36) can be moved at least from one of the positions to the other.

5. The electric drive system (10) according to claim 4, characterized in that the actuator (46) has: - a motor (48); - at least one actuating element (50) that can be driven at least indirectly by means of the motor (48) and thus can be moved in translation relative to the housing (12); and - - at least one lever (54) which is in each case movably coupled to the actuating element (50) and to the pawl (36) in such a way that, as a result of a translational movement of the actuating element (50) relative to the housing (12), the pawl (36) can be moved from one position to another position via the lever (54) by a movement of the lever (54) relative to the pawl (36) and the actuating element (50).

6. The electric drive system (10) according to any one of the preceding claims, characterized in that the electric machine (14) is designed as an axial-flux electric machine.

7. The electric drive system (10) according to any one of the preceding claims, characterized in that the rotor (20) is designed as an external rotor.

8. The electric drive system (10) according to any one of claims 1 to 6, characterized in that the electric machine (14) has a second rotor (24) which is arranged in addition to the rotor (20) as a first rotor (20) and which is connected to the first rotor (20) in a torsionally rigid manner.

9. A motor vehicle having an electric drive system (10) according to any one of the preceding claims.

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