Electric drive for motor vehicle, in particular for motor vehicle

Abstract

The invention relates to an electric drive (10) for a motor vehicle, comprising: a first transmission element (30) having an internal toothing (48); a second transmission element (32) arranged coaxially with the first transmission element (30) and having a first outer toothing (50) arranged radially within the inner toothing (48); a third transmission element (34) arranged coaxially with the first transmission element (30) and the second transmission element (32), the third transmission element having a second outer toothing (52) arranged radially within the inner toothing (48); and the sliding sleeve (40) is provided with a sliding sleeve inner tooth part (44) and a sliding sleeve outer tooth part (46). The sliding sleeve (40) is permanently connected to the first transmission element (30) in a rotationally fixed manner via the sliding sleeve outer toothing (46) and the inner toothing (48).

Description

Field of the Invention

[0001] The present invention relates to an electric drive device for a motor vehicle, in particular for an automobile. Background Art

[0002] In the prior art, electric drive devices for motor vehicles and motor vehicles having such electric drive devices are well known. The corresponding motor vehicles with the corresponding electric drive devices can be electrically driven by means of the electric drive devices, in particular purely electrically. Herein, a particularly space-saving structure of the corresponding electric drive device is desired. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide an electric drive device for a motor vehicle, so as to enable a particularly compact and thus space-saving structural style, and at the same time enable particularly advantageous operation of the electric drive device.

[0004] This object is achieved by an electric drive device having the features of claim 1. Advantageous design solutions with suitable improvements of the present invention are given in the remaining claims.

[0005] The present invention relates to an electric drive device for a motor vehicle (also simply referred to as a vehicle), which is preferably designed as an automobile and particularly as a passenger car. This means that the motor vehicle has an electric drive device in its fully manufactured state and can be electrically driven by means of the electric drive device, in particular purely electrically. Therefore, the motor vehicle is preferably designed as a hybrid vehicle or also as an electric vehicle, particularly as a battery electric vehicle (BEV). For example, the electric drive device has at least one electric machine, by means of which the motor vehicle can be electrically driven, in particular purely electrically. Preferably, the electric machine is a high-voltage component, and its voltage, in particular the electrical operating voltage or the nominal voltage, is preferably greater than 50 volts, particularly greater than 60 volts, and more preferably reaches up to hundreds of volts.

[0006] The electric drive device has a first transmission element, a second transmission element, and a third transmission element. In particular, the electric drive device has a gearbox that includes the transmission elements. For example, the electric drive device has a housing in which the transmission elements can be arranged. For example, a motor vehicle can be driven via the gearbox or the transmission elements. A motor vehicle, for example, in its fully manufactured state, has at least or exactly two axles, also simply referred to as axles, which are arranged one behind the other in the vehicle longitudinal direction and thus front and rear. The respective axles have at least or exactly two wheels, also simply referred to as wheels. The respective wheels of the respective axles are, for example, arranged on both sides of the motor vehicle, and these two sides are opposite each other in the vehicle transverse direction of the motor vehicle. The wheels are ground contact elements through which the motor vehicle can be supported or supported downward in the vehicle vertical direction of the motor vehicle on the ground. If the motor vehicle is driven along the ground and the motor vehicle is supported downward on the ground in the vehicle vertical direction by the ground contact elements, the wheels roll, in particular directly on the ground. Here, the electric drive device can be, for example, electrically driven, in particular at least or exactly one of the wheels of the purely electrically driven axles or the wheels of both axles. The wheels that can be driven by the drive device are also referred to as drive wheels. In the following, when referring to wheels, unless otherwise specified, they are understood to refer to drive wheels. For example, the drive wheels can be driven via the transmission elements of the electric drive device, in particular by an electric machine.

[0007] The electric machine, for example, has a stator and a rotor that can be driven by the stator, for example, and can thus rotate relative to the stator about the machine rotation axis. In particular, the electric machine can provide a drive torque via its rotor to drive the motor vehicle, in particular to drive the drive wheels. For example, the respective drive torque that can be provided or is provided via the rotor on the electric machine can be transmitted to the wheels via the gearbox or via the transmission elements. Thus, the gearbox can, for example, provide the respective drive torque or the respective output torque generated from the respective drive torque via the transmission elements to drive the wheels.

[0008] The transmission elements are arranged coaxially with each other. This means that the second transmission element is arranged coaxially with the first transmission element, and the third transmission element is arranged coaxially with the first transmission element and the second transmission element. Thus, the respective transmission elements can rotate relative to the housing about the common transmission element rotation axis of the transmission elements (also simply referred to as the rotation axis). In particular, when the transmission elements are not torsionally interconnected, the transmission elements can, for example, rotate relative to each other about the transmission element rotation axis.

[0009] The first transmission element has an internal tooth section. The second transmission element has a first external tooth section which is arranged radially, i.e., in the radial direction of the electric drive device, inside the internal tooth section. The above is particularly understood to mean that the first external tooth section is arranged at a position more inward than the internal tooth section in the radial direction of the electric drive device, the axial direction of the electric drive device being perpendicular to the radial direction. In particular, the axial direction of the electric drive device coincides with the (axis of rotation) direction according to the first embodiment. The third transmission element has a second external tooth section which is arranged radially, i.e., in the radial direction of the drive device, inside the internal tooth section. Therefore, the second external tooth section is also arranged at a position more inward than the internal tooth section in the radial direction of the electric drive device.

[0010] The electric drive device has a sliding sleeve, also known as a sleeve or shift sleeve. In particular, the sliding sleeve is part of a shifting device by means of which the electric drive device, in particular the gearbox, can be advantageously switched, as will be explained in more detail below.

[0011] The sliding sleeve has an internal sliding tooth section and an external sliding tooth section. Via the external and internal sliding tooth sections, the sliding sleeve is permanently torsionally connected to the first transmission element. This means that the external sliding tooth section meshes into the internal tooth section, in particular permanently, so that the first transmission element and the sliding sleeve are permanently torsionally connected to each other. Therefore, the sliding sleeve is coaxially arranged with the transmission element and the sliding sleeve can rotate together with the first drive element about the axis of rotation.

[0012] Within the scope of the present disclosure, the feature that two components (e.g., the sliding sleeve and the first transmission element) are torsionally connected to each other should be understood to mean that the components torsionally connected to each other are coaxially arranged with each other and, in particular, when the components are driven, rotate together or simultaneously about the common component axis of rotation of the components, e.g., the axis of rotation described above, at the same angular velocity, in particular relative to the housing. The feature that two components are permanently torsionally connected to each other should be understood to mean that no shifting element, for example, which can be switched between a coupled state and a decoupled state, is provided, in which coupled state the components are torsionally connected to each other, while in the decoupled state the components are decoupled from each other and can rotate relative to each other, so that torque cannot be transmitted between the components via the shifting element, but rather the components are always or permanently torsionally connected to each other as a result. The feature that the external sliding tooth section permanently meshes into the internal tooth section should be understood to mean that the drive device cannot be switched between, for example, an engaged state and a non-engaged state, in which engaged state the external sliding tooth section meshes into the internal tooth section or vice versa, while in the non-engaged state the external sliding tooth section does not mesh into the internal tooth section, but rather the external sliding tooth section always or permanently meshes into the internal tooth section.

[0013] The sliding sleeve is movable between at least one first engagement position, at least one second engagement position, and at least one neutral position, in particular along a sliding direction and / or relative to the housing. For example, the sliding direction is parallel to or extends in the axial direction, or the sliding direction coincides with the axial direction of the drive device. The corresponding engagement positions are also referred to as gear positions, and the neutral position is also referred to as the neutral gear position, for example. The first engagement position is the first position or is also referred to as the first position, the second engagement position is the second position or is also referred to as the second position, and the neutral position is the third position or is also referred to as the third position.

[0014] In the first engagement position, the sliding sleeve is torsionally connected to the second transmission element via the internal teeth of the sliding sleeve and the first external teeth. In addition, in the first engagement position, the sliding sleeve is torsionally connected to the first transmission element via the external teeth of the sliding sleeve and the internal teeth, so that in the first engagement position, the first transmission element and the second transmission element are torsionally connected to each other by means of the sliding sleeve, so that the sliding sleeve, the first transmission element, and the second transmission element form a first rotating unit, which as a whole can rotate relative to the housing about the axis of rotation. In addition, the first rotating unit can rotate relative to the third transmission element about the axis of rotation. Therefore, in particular, it is arranged that in the first engagement position, the internal teeth of the sliding sleeve do not engage with the second external teeth, so that in the first engagement position, the internal teeth of the sliding sleeve and together with the sliding sleeve are decoupled from the third transmission element, so that the third transmission element is decoupled from the first rotating unit and can therefore rotate relative to the first rotating unit about the axis of rotation. In other words again, in the first engagement position, it is arranged that the internal teeth of the sliding sleeve engage only with the first external teeth with respect to the first external teeth and the second external teeth.

[0015] In the second engagement position, the sliding sleeve is torsionally connected to the third transmission element via the internal teeth of the sliding sleeve and the second external teeth, and in the second engagement position, the sliding sleeve is torsionally connected to the first transmission element via the external teeth of the sliding sleeve and the internal teeth. Therefore, in the second engagement position, the first transmission element, the third transmission element, and the sliding sleeve are torsionally connected to each other. In other words, in the second engagement position, the first transmission element and the third transmission element are torsionally connected to each other by means of the sliding sleeve, so that for example in the second engagement position, the sliding sleeve, the first transmission element, and the third transmission element form a second rotating unit, which as a whole can rotate relative to the housing, in particular also relative to the second transmission element about the axis of rotation. Therefore, in the second engagement position, the second transmission element can rotate relative to the second rotating unit, that is, relative to the sliding sleeve, relative to the first transmission element, and relative to the third transmission element.

[0016] Therefore, in the second engagement position, the second transmission element is set to be decoupled from the sliding sleeve and also from the first and third transmission elements, so that the second transmission element can rotate about the axis of rotation relative to the second rotating unit. In the second engagement position, the internal teeth of the sliding sleeve engage with the second external teeth, but not with the first external teeth. In other words, for example, in the second engagement position, it is set that the internal teeth of the sliding sleeve engage only with the second external teeth with respect to the first and second external teeth, so that the second transmission element is decoupled from the rotating unit and rotates about the axis of rotation relative to the second rotating unit.

[0017] In the neutral position, the sliding sleeve is non-rotatably connected only or exclusively to the first transmission element with respect to the transmission elements, in such a way that the sliding sleeve is non-rotatably connected to the first transmission element via the external teeth and internal teeth of the sliding sleeve. This means that in the neutral position, the internal teeth of the sliding sleeve do not engage with the first external teeth nor with the second external teeth, so that in the neutral position, both the second and third transmission elements are decoupled from the sliding sleeve and thus from the first transmission element. Therefore, the transmission elements can rotate relative to each other about the axis of rotation in the neutral position. Once again, in other words, in the neutral position, the internal teeth of the sliding sleeve do not engage with the first external teeth nor with the second external teeth.

[0018] Since the external teeth of the sliding sleeve engage with the internal teeth, the sliding sleeve is non-rotatably connected to the first transmission element in a form-fitting and permanent manner. Since in the respective engagement positions, the internal teeth of the sliding sleeve engage with the respective external teeth, the sliding sleeve is non-rotatably connected to the second or third transmission element in a form-fitting manner in the respective engagement positions, so that the sliding sleeve is designed as a form-fitting shift element, in particular as a claw shift element. In the present invention, a particularly compact structural style of the shift device, in particular the sliding sleeve itself, which includes the sliding sleeve and thus the external and internal teeth of the sliding sleeve and preferably also includes internal and external teeth, can be presented here, so that a particularly compact structural style of the entire electric drive device can be presented. In particular, the sliding sleeve can be arranged in a particularly space-saving manner as a shift element, so that a new and advantageous gearbox structure can be presented compared to conventional solutions.

[0019] In order to be able to achieve a particularly compact structural style, in one design of the present invention, an axial movement region (also called an adjustment or movement region) is provided, within which the sliding sleeve can move between positions, and / or it is set that the axial length of the internal teeth of the first transmission element extends axially, i.e., in the axial direction of the electric drive device and thus along the axis of rotation, from the first external teeth of the second transmission element to the second external teeth of the third transmission element.

[0020] Another design is characterized in that the sliding sleeve has at least one radial rib, i.e., a rib extending outward in the radial direction of the drive device, and the rib passes through the slot of the first transmission element. The slot is preferably elongated in the axial direction of the drive device and / or along the sliding direction and is thus designed as a long hole, so that in particular when the rib moves along the sliding direction in the slot, the sliding sleeve can move axially, i.e., in the axial direction of the drive device, relative to the first transmission element and, for example, also relative to the second transmission element and relative to the third transmission element via the rib. Thereby, the sliding sleeve can be moved in a particularly space-saving manner.

[0021] It can be seen that by means of the sliding sleeve, the first transmission element can be selectively coupled to the second transmission element or the third transmission element. Thereby, a particularly advantageous and demand-based switching operation of the drive device can be achieved. In particular, a particularly advantageous switching of the gears of the drive device, especially the gearbox, can be realized, and in a particularly space-saving manner. Therefore, a particularly advantageous driving performance can be presented and thus a particularly advantageous operation of the drive device can be presented.

[0022] For example, at least or exactly two driving modes can be switched. For example, in the first engagement position, the first driving mode is engaged, that is, switched or activated, while the second driving mode is disengaged, that is, disabled. In the second engagement position, for example, the second driving mode is engaged, that is, activated, while the first driving mode is disengaged, that is, not switched. These driving modes are, for example, distinguished from each other in terms of the kinematic connection between the electric machine and the gearbox, and via this kinematic connection, for example, the mode of action of the drive device is determined, particularly from the electric machine to the wheels, and more particularly from the rotor to the wheels.

[0023] Since the rib passes through the slot of the first transmission element, the rib passes through the first transmission element, so that the rib can be said to cross or straddle the first transmission element. Thereby, the sliding sleeve can be moved in a particularly space-saving manner, and thus the switching occurs.

[0024] Another design is characterized in that the rib extends radially outward away from the cylindrical part of the sliding sleeve of the electric drive device. The cylindrical part is cylindrical on the inner circumferential side and / or the outer circumferential side, i.e., in the form of a straight cylinder, especially a hollow cylinder. Here, the internal teeth of the sliding sleeve are arranged radially, i.e., on the inward-facing inner side in the radial direction of the drive device. Preferably, the cylindrical part and the internal teeth of the sliding sleeve are designed to be integral with each other, i.e., composed of a single piece of material and thus formed or designed as a single unit by a monomer. Additionally, it is conceivable that the internal teeth of the sliding sleeve and the cylindrical part are designed to be independent of each other and connected to each other. The external teeth of the sliding sleeve are arranged radially, i.e., on the outward-facing outer side in the radial direction of the drive device and thus away from the inner side. Here, it is conceivable that the external teeth of the sliding sleeve and the cylindrical part are designed to be integral with each other, i.e., composed of a single piece of material. Additionally, it is conceivable that the external teeth of the sliding sleeve and the cylindrical part are designed to be independent of each other and connected to each other. Here, a particularly compact structural style of the drive device can be presented.

[0025] In order to enable the sliding sleeve to move in a particularly space-saving manner, in other designs of the present invention, an operating element is provided, which can move axially, i.e., in the axial direction of the drive device, and thus, for example, along the sliding direction, particularly relative to the housing. The operating element can be designed as a shift fork, for example. In particular, the sliding sleeve can move relative to the housing.

[0026] With the help of the operating element, the sliding sleeve can move axially between positions when the operating element moves axially. In other words, in order to move the sliding sleeve in the axial direction of the drive device (also referred to as the drive system), particularly relative to the housing, the operating element is moved axially, i.e., in the axial direction of the drive device, particularly relative to the housing.

[0027] Here, it has been proven particularly advantageous that the sliding sleeve can move axially between positions via the rib with the help of the operating element when the operating element moves axially.

[0028] Preferably, the rib and the cylindrical part are designed to be integral with each other, i.e., composed of a single piece of material. This means that the cylindrical part and the rib are preferably not composed of components designed to be independent of each other and connected to each other, but preferably, the cylindrical part and the rib are composed of a single piece of material and thus formed or designed as a single unit by a monomer. Additionally, it is conceivable that the rib and the cylindrical part are designed to be independent of each other and are particularly torsion-resistant and / or connected to each other in the axial direction of the drive device. Thereby, particularly simple assembly can be achieved and thus a particularly compact structural style can be achieved.

[0029] In order to move the sliding sleeve axially, i.e. in the axial direction of the drive device and particularly relative to the housing, the operating element is moved axially, particularly relative to the housing. Here, the operating element cooperates with the rib, particularly such that the operating element is coupled to the rib. This means that the force - by means of which the operating element can be moved and the sliding sleeve can be moved via the operating element - can or is transferred from the operating element to the rib and thus via the rib to the sliding sleeve in order to move the sliding sleeve axially via the rib by means of the operating element, particularly by moving the operating element axially. Thereby, a particularly compact structural style can be presented.

[0030] If the operating element is designed, for example, as the above-mentioned shift fork, it is conceivable that the shift fork surrounds the rib, particularly in the circumferential direction around the axial direction of the drive unit of the sliding sleeve, over an angular range or through an angular range, which angular range is, for example, greater than 90 degrees.

[0031] In order to be able to achieve a particularly compact structural style of the sliding sleeve, in other design variants of the present invention, it is provided that the first transmission element has a through-hole which extends particularly in the radial direction of the drive device. The operating element passes through the through-hole of the first transmission element such that the through-hole of the transmission element is passed through by the operating element. The operating element projects into a corresponding recess of the sliding sleeve, and the sliding sleeve can be axially moved relative to the first transmission element between positions by means of the operating element when the operating element moves axially in the through-hole. In other words, in order to axially move the sliding sleeve in a particularly space-saving manner between positions in this case, the operating element is moved axially, wherein the operating element is moved in the through-hole of the first transmission element. The through-hole of the first transmission element is preferably elongate along the sliding direction or in the axial direction of the drive device and is thus, for example, configured as a slot, such that the operating element can be moved axially in the through-hole of the first transmission element and relative to the first transmission element when passing through the through-hole of the first transmission element in order to thus axially move the sliding sleeve. Thus, the space requirement of the shifting device and thus the space requirement of the entire drive device can be kept particularly low.

[0032] In order to be able to achieve a particularly advantageous, space-saving and, if required, movement of the sliding sleeve, in another design variant of the present invention, an electromechanical or hydraulic operating device is provided by means of which the operating element can be moved axially and the sliding sleeve can be moved axially via the operating element.

[0033] Finally, in order to achieve particularly small space requirements, it has proven particularly advantageous for the first transmission element to be designed as the rotor shaft of the rotor of an electric machine. Preferably, the second transmission element is designed here as the first planetary gear set element of a planetary gear set, in particular of a gearbox. Furthermore, it is preferably provided that the third transmission element is designed as the second planetary gear set element of the planetary gear set. In other words, the electric drive device, in particular the aforementioned gearbox, preferably has the aforementioned planetary gear set, also simply referred to as the planetary set. The planetary gear set has a sun gear, a planet carrier, and a ring gear. Furthermore, the planetary gear set has, for example, at least one planetary gear, which is rotatably held at the planet carrier and, in particular simultaneously, meshes with the sun gear and the ring gear. The sun gear, the planet carrier, and the ring gear are also referred to as transmission elements or planetary gear set elements of the planetary gear set, such that the second transmission element is the first planetary gear set element among the planetary gear set elements of the planetary gear set, and the third transmission element is the second planetary gear set element among the planetary gear set elements of the planetary gear set. Thereby, a particularly advantageous shifting ability can be presented in a particularly space-saving manner, and thus a particularly advantageous driving performance and a particularly advantageous operation of the drive device.

[0034] Further advantages, features, and details of the invention are given in the following description of the preferred embodiments and with reference to the drawings. Without departing from the scope of the invention, the above-mentioned features and combinations of features mentioned in the description, as well as the features and combinations of features mentioned in the drawing description and / or shown individually in the drawings, can be used not only in the respective combinations but also in other combinations or individually. Description of the Drawings

[0035] In the drawings:

[0036] Figure 1 A schematic view showing an electric drive device for a motor vehicle is shown;

[0037] Figure 2 A schematic front view of the gearbox of the drive device is partially shown;

[0038] Figure 3 Partially shows the gearbox along Figure 2 The schematic sectional view taken along the tangent A-A shown;

[0039] Figure 4 Partially shows the gearbox along Figure 2 The schematic sectional view taken along the tangent B-B shown.

[0040] In the figures, the same or functionally identical elements have the same reference numerals. Detailed Description of the Invention

[0041] Figure 1The electric drive device 10 of a motor vehicle (also simply referred to as a vehicle) is shown in the form of a schematic illustration. The motor vehicle is preferably designed as an automobile, in particular as a passenger car. The drive device 10 is also referred to as a drive system. The motor vehicle in its fully manufactured state has at least or exactly two axles, also simply referred to as axles, which are arranged one behind the other in the vehicle longitudinal direction of the motor vehicle and thus front to back. The respective axles have at least or exactly two wheels, which are also simply referred to as wheels. The respective wheels of the respective axles are arranged on both sides of the motor vehicle (also referred to as a vehicle), and these two sides are opposite each other in the vehicle transverse direction of the motor vehicle. By means of the drive system, the wheels of at least or exactly one of the axles or the wheels of both axles can be electrically driven, in particular purely electrically driven, so that the motor vehicle can be electrically driven, in particular purely electrically driven. The wheels that can be driven by means of the drive device 10 are Figure 1 shown particularly schematically therein and are labeled 12 and 14. Here, the axle including the wheels 12 and 14 is labeled 16.

[0042] The electric drive device 10 has an electric machine 18 that is particularly schematically represented in Figure 1 . The electric machine has a stator 20 and a rotor 22. The rotor 22 can be driven by means of the stator 20 and can thus rotate about the machine rotation axis 24 relative to the stator 20 and relative to the housing 26 that is particularly schematically represented in Figure 1 . The electric machine 18 can provide a drive torque for driving the wheels 12 and 14 via the rotor 22.

[0043] The electric drive device 10 has a gearbox 28, which has a first transmission element 30, a second transmission element 32, and a third transmission element 34 that are particularly schematically represented in Figure 1 . For example, the gearbox 28 has a planetary gear set 36, also simply referred to as a planetary set. The planetary gear set 36 has a sun gear, a planet carrier (also referred to as a support carrier), and a ring gear. For example, the planetary gear set 36 has at least one or more planetary gears. The respective planetary gears are rotatably supported at the planet carrier and are particularly simultaneously meshed with the sun gear and the ring gear. The sun gear, the planet carrier, and the ring gear are also referred to as the planetary gear set elements of the planetary gear set 36. The rotor 22 has, for example, a rotor shaft via which the rotor 22 can provide a corresponding drive torque. In the embodiment shown in the figure, the first transmission element 30 is, for example, the rotor shaft of the rotor 22. The transmission element 32 is, for example, the first planetary gear set element among the planetary gear set elements, and the transmission element 34 is, for example, the second planetary gear set element among the planetary gear set elements. In Figure 1 , there is also shown an additional gear assembly of the gearbox 28, which is additionally provided in addition to the transmission elements 30, 32, and 34 and is labeled 37.

[0044] As shown by arrow 39, the transmission element 30 can be connected, in a torque-transmitting manner, particularly torsionally rigidly, to or with a further gear assembly 37. Thus, a corresponding drive torque can be introduced, for example, by the transmission element 30 into the planetary gear set 36. The planetary gear set 36 can provide, for example, particularly via the transmission element 32 or the transmission element 34, respective input torques generated by the corresponding drive torque, which input torques can be used to drive the wheels 12 and 14. The transmission elements 30, 32, and 34 can rotate relative to the housing 26 about the machine rotation axis 24 (also simply referred to as the rotation axis). For example, the transmission elements 32, 34, and 30 are arranged in the housing 26.

[0045] In order now to be able to connect the first transmission element 30 selectively and torsionally rigidly to the transmission element 32 or the transmission element 34, a shifting device 38 is provided, which will be explained in more detail below. The shifting device 38 has a sliding sleeve 40, which can be moved relative to the housing 26 along a sliding direction shown by the double arrow 42 between at least one first engagement position, at least one second engagement position, and at least one neutral position. It can be seen that the sliding direction extends in the axial direction of the drive system or coincides with the axial direction, such that the sliding sleeve 40 can be moved relative to the housing 26. The first engagement position is also referred to as the first position, the second engagement position is also referred to as the second position, and the neutral position is also referred to as the third position. Thus, the sliding sleeve 40 can be axially moved relative to the housing 26 between the positions.

[0046] From Figure 1 and Figure 2 a combined observation of, it can be seen that the transmission elements 30, 32, and 34 are arranged coaxially with one another, where the sliding sleeve 40 is arranged coaxially with the transmission elements 30, 32, and 34. The shifting device 38 is shown in more detail in Figures 2 to 4 . From Figure 3 and Figure 4 it can be seen that the sliding sleeve 40 has an inner sliding sleeve tooth section 44 and an outer sliding sleeve tooth section 46. The first transmission element 30 has an inner tooth section 48. The second transmission element 32 has a first outer tooth section 50, and the third transmission element 34 has a second outer tooth section 52. Via the outer sliding sleeve tooth section 46 and the inner tooth section 48, the sliding sleeve 40 is permanently torsionally rigidly connected to the first transmission element 30. For this purpose, the outer sliding sleeve tooth section 46 meshes permanently with the inner tooth section 48. The sliding sleeve 40 can be axially moved relative to the transmission elements 30, 32, and 34 and thus relative to the inner tooth section 48 as well as relative to the outer tooth sections 50 and 52 between the positions. In Figure 3In this case, the neutral position is marked as N. The first engagement position is marked as A, and the second engagement position is marked as B. At the first engagement position A, the sliding sleeve 40 is torsionally connected to the second transmission element 32 via the internal teeth 44 of the sliding sleeve and the first external teeth 50, and is torsionally connected to the first transmission element 30 via the external teeth 46 of the sliding sleeve and the internal teeth 48. Specifically, the internal teeth 44 of the sliding sleeve engage with the first external teeth 50, and the external teeth 46 of the sliding sleeve engage with the internal teeth 48. At the same time, the transmission element 34 is decoupled from the sliding sleeve 40 and thus from the transmission elements 30 and 32 and can therefore rotate about the axis of rotation relative to the sliding sleeve 40 and relative to the transmission elements 30 and 32. This is achieved in that at the first engagement position A, although the internal teeth 44 of the sliding sleeve engage with the first external teeth 50, they do not engage with the second external teeth 52.

[0047] At the second engagement position B, the sliding sleeve 40 is torsionally connected to the transmission element 34 via the internal teeth 44 of the sliding sleeve and the second external teeth 52, and is torsionally connected to the first transmission element 30 via the external teeth 46 of the sliding sleeve and the internal teeth 48. At the same time, the transmission element 32 is decoupled from the sliding sleeve 40 and from the transmission elements 30 and 34 and can therefore rotate about the axis of rotation relative to the sliding sleeve 40 and relative to the transmission elements 30 and 34. This is achieved in that at the second engagement position B, the internal teeth 44 of the sliding sleeve engage with the external teeth 52, but do not engage with the external teeth 50. Thus, at the first engagement position A, the transmission element 32 is torsionally connected to the transmission element 30 by means of the sliding sleeve 40, while the transmission element 34 can rotate about the axis of rotation relative to the transmission elements 30 and 32 and relative to the sliding sleeve 40. At the second engagement position B, the transmission element 34 is torsionally connected to the transmission element 30 by means of the sliding sleeve 40, while the transmission element 32 can be decoupled from the sliding sleeve 40 and from the transmission elements 30 and 34 and can therefore rotate about the axis of rotation relative to the transmission elements 30 and 34 and relative to the sliding sleeve 40.

[0048] At the neutral position N, the sliding sleeve 40 is torsionally connected only to the first transmission element 30 with respect to the transmission elements 30, 32 and 34. Specifically, the sliding sleeve 40 is torsionally connected to the transmission element 30 via its external teeth 46 and internal teeth 48 of the sliding sleeve. At the neutral position N, the internal teeth 44 of the sliding sleeve do not engage with either the external teeth 50 or the external teeth 52. Thus, all three transmission elements 30, 32 and 34 are decoupled from each other at the neutral position N and can therefore rotate about the axis of rotation relative to each other.

[0049] From Figure 3It can be seen particularly clearly that in the illustrated embodiment, the sliding sleeve 40 is designed in two parts and here has a first sleeve part 54 and a second sleeve part 56. The sleeve parts 54 and 56 are constructed to be independent of each other and are connected to each other in particular torsion-resistant and in the axial direction of the drive device 10. For this purpose, for example, a connecting element 58 is provided, which is designed, for example, independently of the sleeve parts 54, 56. For example, the connecting element 58 is designed as a locking ring by means of which the sleeve part 56 is locked at the sleeve part 54, in particular such that relative rotation between the sleeve parts 54, 56 about the axis of rotation is prevented, as well as relative movement between the sleeve parts 54, 56 in the axial direction of the drive device 10.

[0050] It can be seen that the sleeve part 56 has a rib 60 (also called a tab), which extends at least mainly in the radial direction of the drive system 10. Here, the sleeve part 56 has a cylindrical part 62, which is designed as cylindrical on the outer peripheral side and / or the inner peripheral side. The rib 60 extends outward from the cylindrical part 62 in the radial direction of the drive device 10. The first transmission element 30 has a through-hole 64 (also called a window), through which the rib 60 passes. The rib 60 is thus partly arranged on the first side S1 of the first transmission element 30 and partly on the second side S2, where the second side S2 points inward in the radial direction of the drive device 10 and away from the side S2, such that the side S1 points outward in the radial direction of the drive device 10 and in particular away from the external teeth 50 and 52 and the internal teeth 44 of the sliding sleeve. This means that the external teeth 50 and 52 and the internal teeth 44 of the sliding sleeve are arranged on the second side S2, where the cylindrical part 62 and the first part of the rib 60 are also arranged. The second part of the rib 60 and the sleeve part 54 are arranged on the first side S1. For example, the through-hole 64 is a slot. In particular, the through-hole 64 extends in an elongated manner in the axial direction of the drive device 10, such that the rib 60 can move axially relative to the transmission element 30 in the through-hole 64, i.e., in the axial direction of the drive device 10. By means of the rib 60, the sleeve part 56 and the sleeve part 54 and together with the sliding sleeve 40 can move axially relative to the transmission elements 30, 32 and 34 as a whole, such that the sliding sleeve 40 can move axially and between positions relative to the housing 26 and relative to the transmission elements 30, 32 and 34.

[0051] It can be seen that the external teeth 50 and 52 are arranged radially, i.e., when viewed in the radial direction of the electric drive device 10, within the internal teeth 48. Here, the internal teeth 48 are also arranged on the second side S2. From Figure 2It can be seen particularly clearly that the ribs 60 (also referred to as tabs) extend over an angular range in the circumferential direction around the axis of rotation of the sliding sleeve 40 and thus in the circumferential direction around the axial direction of the drive device 10, and this angular range is, for example, greater than 10 degrees. Further, it can be seen from Figure 3 and Figure 4 that the internal teeth 44 of the sliding sleeve are provided at the inner side 66 of the cylindrical part 62 that points inwards in the radial direction of the drive device 10, and the external teeth 46 of the sliding sleeve are provided at the outer side 68 of the cylindrical part 62 that points outwards in the radial direction of the drive device 10. In this way, a particularly compact structural style can be achieved.

[0052] Preferably, the sliding sleeve 40 has a plurality of, in particular at least or exactly three, ribs 60, and these ribs are arranged, for example, evenly distributed in the circumferential direction of the drive device 10 and thus in the circumferential direction of the sliding sleeve 40. Accordingly, the transmission element 30, for example, has a plurality of, in particular at least or exactly three, through-holes 64, and these through-holes are radially penetrated by the corresponding ribs 60 and are arranged evenly distributed in the circumferential direction. The through-hole 64 has such a large extension when looking outwards in the radial direction that the extension of the through-hole 64 outwards in the radial direction is greater than or equal to the extension of the rib 60 outwards in the radial direction. In this way, the rib 60 can be inserted into the through-hole 64 in the axial direction, so that the sleeve member 56 can be assembled at the sleeve member 54 in the axial direction and locked, for example, by means of the connecting element 58. In this way, simple and cost-effective assembly can be ensured. The external teeth 50 and 52, the internal teeth 48, and the external teeth 46 and internal teeth 44 of the sliding sleeve are preferably designed as sliding teeth, and these sliding teeth make it possible to axially move the sliding sleeve 40 relative to the transmission elements 30, 32, and 34 between positions.

[0053] In a particularly advantageous design, but also alternatively, it may be possible to replace the connecting element 58 and the ribs 60 with a plurality of cylindrical pins, for example three cylindrical pins, and these cylindrical pins are arranged perpendicular to the axis of rotation, that is, arranged in the radial direction, and connect the sleeve member 54 and the sleeve member 56 torsionally and axially firmly, and thus prevent relative movement. Similarly, then the two sleeve members 54 and 56 and the first transmission element 30 are torsionally connected by means of cylindrical pins via the through-hole 64, and this through-hole is, for example, implemented as a long hole or a slot, or the two sleeve members 54 and 56 and the first transmission element 30 are torsionally connected by means of cylindrical pins via a plurality of through-holes 64.

[0054] The sliding sleeve 40, in particular the sleeve member 54, has a recess 70, for example, designed as a groove. The recess 70 is, for example, an annular groove, and this annular groove, for example, surrounds in the circumferential direction around the axial direction of the drive device 10 and thus in the circumferential direction of the sliding sleeve 40, and particularly completely surrounds. The drive device 10, for example, hasFigure 3 , the operating element 72 is particularly schematically represented in the figure, which is designed to be independent of the sleeve 40. It can be seen that the operating element 72 is inserted into the recess 70, so that the operating element 72 cooperates with the sleeve 40. For example, the operating element 72 is a shift fork, which is inserted into the recess 70 through an angular range extending in the circumferential direction, so that the sleeve 40 is surrounded through the angular range. Preferably, the angular range is greater than 90 degrees. In particular, the angular range can be less than or equal to 180 degrees. The operating element 72 can be moved axially relative to the housing 26 and relative to the transmission elements 30, 32 and 34, that is, in the axial direction of the drive device 10. Due to the insertion of the operating element 72 into the recess 70, the operating element 72 is coupled to the sleeve 40 in a form-fitting manner, so that the sleeve 40 is axially moved together with the operating element 72 relative to the transmission elements 30, 32 and 34 by the axial movement of the operating element 72. Therefore, the sleeve 40 can be moved axially between positions by the axial movement of the operating element 72. In this case, for example Figure 3 The operating device 74, which is particularly schematically indicated in the figure, can be operated, for example, electromechanically or hydraulically, and is therefore designed as an electromechanical or hydraulic operating device. By means of the operating device 74, the operating element 72 and, with it, the sleeve 40 can be moved axially, so that the sleeve 40 can be moved in a space-saving manner and as required.

[0055] List of reference numerals

[0056] 10 Electric drive

[0057] 12 Wheels

[0058] 14 Wheels

[0059] 16 Axles

[0060] 18 Electric machines

[0061] 20 Stator

[0062] 22 Rotor

[0063] 24 Machine rotation axis

[0064] 26 Housing

[0065] 28 Gear Box

[0066] 30 First transmission element

[0067] 32 Second transmission element

[0068] 34 Third transmission element

[0069] 36 Planetary gear set

[0070] 37 Gear assembly

[0071] 38 Shifting device

[0072] 39 Arrow

[0073] 40 Sleeve

[0074] 42 Double arrow

[0075] 44 Inner teeth of sleeve

[0076] 46 Outer teeth of sleeve

[0077] 48 Inner teeth

[0078] 50 First outer teeth

[0079] 52 Second outer teeth

[0080] 54 Sleeve component

[0081] 56 Sleeve component

[0082] 58 Connecting element

[0083] 60 Rib

[0084] 62 Cylindrical part

[0085] 64 Through hole

[0086] 66 Inner side

[0087] 68 Outer side

[0088] 70 Groove

[0089] 72 Operating element

[0090] 74 Operating device

[0091] S1 Side

[0092] S2 Side

[0093] A First engagement position

[0094] B Second engagement position

[0095] N Neutral position

Claims

1. An electric drive device (10) for a motor vehicle, comprising a first transmission element (30), the first transmission element having an internal toothing (48); a second transmission element (32) arranged coaxially with the first transmission element (30), the second transmission element having a first external toothing (50) arranged radially within the internal toothing (48); a third transmission element (34) arranged coaxially with the first transmission element (30) and the second transmission element (32), the third transmission element having a second external toothing (52) arranged radially within the internal toothing (48); and a sliding sleeve (40), the sliding sleeve: - having an inner toothed portion (44) of the sliding sleeve; - having an outer toothed portion (46) of the sliding sleeve; - is permanently connected to the first transmission element (30) in a rotationally fixed manner via the outer toothing (46) of the sleeve and the inner toothing (48); and - Ability to move between: o at least one first engagement position (A) as a first position, in which the sleeve (40) is connected to the second transmission element (32) in a rotationally fixed manner via the sleeve inner toothing (44) and the first outer toothing (50), and is connected to the first transmission element (30) in a rotationally fixed manner via the sleeve outer toothing (46) and the inner toothing (48); o at least one second engagement position (B) as a second position, in which the sleeve (40) is connected to the third transmission element (34) in a rotationally fixed manner via the sleeve inner tooth portion (44) and the second outer tooth portion (52), and is connected to the first transmission element (30) in a rotationally fixed manner via the sleeve outer tooth portion (46) and the inner tooth portion (48); o at least one neutral position (N) as the third position, in which the sliding sleeve (40) is connected to the transmission element (30, 32, 34) only in a rotationally fixed manner to the first transmission element (30), in, The sliding sleeve (40) is connected to the first transmission element (30) in a rotationally fixed manner via the sliding sleeve outer toothing (46) and the inner toothing (48). It is characterized in that A connecting element (58) and a ridge (60) or a plurality of cylindrical pins are provided, and the first sleeve part (54) and the second sleeve part (56) of the sliding sleeve (40) are connected in a rotationally fixed and axially fixed manner, wherein the sleeve parts (54, 56) and the first transmission element (30) are connected by means of the cylindrical pin or by means of the connecting element (58) and the ridge (60) via at least one through hole (64) in the first transmission element (30).

2. The electric drive device (1) according to claim 1, It is characterized in that An axial movement area, within which the sleeve (40) is movable between the positions and / or the axial length of the inner toothing (48) of the first transmission element (30) extends from the first outer toothing (50) of the second transmission element (32) to the second outer toothing (52) of the third transmission element (34).

3. The electric drive device (10) according to claim 1, It is characterized in that The ridge (60) extends outward from the cylindrical portion (62) of the sleeve (40) in a radial direction, wherein the sleeve inner tooth portion (44) is arranged on an inner side (66) of the cylindrical portion (62) pointing radially inward, and wherein the sleeve outer tooth portion (46) is arranged on an outer side (68) of the cylindrical portion (62) pointing radially outward.

4. The electric drive device (10) according to any one of the preceding claims, It is characterized in that An axially displaceable operating element (72) is provided, by means of which the sliding sleeve (40) can be axially displaced between the positions when the operating element (72) is axially displaced.

5. The electric drive device (10) according to claim 4, It is characterized in that The sliding sleeve (40) can be axially displaced between the positions via the ridge (60) by means of the operating element (72) when the operating element (72) is axially displaced.

6. The electric drive device (10) according to claim 4, It is characterized in that The first transmission element (30) has a through hole (64), the operating element (72) passes through the through hole, the operating element is inserted into the corresponding recess (70) of the sliding sleeve (40), and the sliding sleeve can be axially moved between the positions relative to the first transmission element (30) by means of the operating element (72) when the operating element (72) moves axially in the through hole (64).

7. The electric drive device (10) according to any one of claims 4 to 6, It is characterized in that An electromechanical or hydraulic operating device (74) is provided, by means of which the operating element (72) can be moved axially.

8. The electric drive device (10) according to any one of the preceding claims, It is characterized in that The first transmission element (30) is designed as a rotor shaft of a rotor (22) of an electric machine (18) of the electric drive (10); - the second transmission element (32) is designed as a first planetary gear set element of a planetary gear set (36); and The third transmission element (34) is designed as a second planetary gear set element of the planetary gear set (36).

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