Axial flux machine for a motor vehicle and motor vehicle

Abstract

The invention relates to an axial flux machine (10) with a stator assembly (12) comprising a housing (14) and a stator (18) which has stator teeth (28) wrapped with copper wire arranged around its circumference and which are arranged axially between two end caps (20, 22) spaced apart from each other, and a busbar (30) rotating circumferentially around the stator (18) via which the copper wire can be supplied with electrical energy, and with a sealing device (32) comprising at least one sealing element (34) which has an oval cross-section extending axially from one of the end caps (20, 22) to the other end cap (22, 20) and thereby bearing against the end caps (20, 22), and which has an opening (40) extending at least over a partial region of an axial extension of the stator teeth (28).by means of which an annular gap (R) arranged radially between two components of the stator assembly (12) is sealed.

Description

[0001] The invention relates to an axial flux machine for a motor vehicle, in particular for a motor car. Furthermore, the invention relates to a motor vehicle with at least one such axial flux machine.

[0002] DE 10 2008 019 925 A1 is a hydraulic gear machine as is known.

[0003] The object of the present invention is to create an axial flux machine for a motor vehicle and a motor vehicle with at least one such axial flux machine, so that a particularly advantageous fluid guidance can be realized.

[0004] This problem is solved by an axial flux machine with the features of claim 1 and by a motor vehicle with the features of claim 10. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims.

[0005] A first aspect of the invention relates to an axial flux machine for a motor vehicle, also referred to simply as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state, has the axial flux machine and can be driven electrically by means of the axial flux machine, in particular purely electrically. The axial flux machine is also referred to as an electric axial flux machine and is an electrical machine. The axial flux machine is also referred to as an axial flux motor (AFM). Preferably, the axial flux machine is a high-voltage component whose electrical voltage, in particular its operating or rated voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and most preferably several hundred volts.The axial flux machine comprises a housing and a stator that is arranged at least partially, and in particular at least predominantly and thus at least more than halfway or completely, within the housing. In particular, the stator is designed separately from the housing and is rotationally fixed to the housing. Furthermore, the stator is preferably connected to the housing in such a way that translational relative movements between the stator and the housing in the axial direction of the axial flux machine are prevented. For example, the axial flux machine also comprises a rotor that can be driven by the stator and is thus rotatable about a machine axis of rotation relative to the stator and relative to the housing. For example, the rotor is arranged at least partially within the housing.The axial direction of the axial flux machine, whose radial direction is perpendicular to the axial direction of the axial flux machine and thus perpendicular to the machine's axis of rotation, coincides with the machine's axis of rotation. When the axial direction is mentioned before and after, this refers, unless otherwise specified, to the axial direction of the axial flux machine. Conversely, when the radial direction is mentioned before and after, this refers, unless otherwise specified, to the radial direction of the axial flux machine. Furthermore, "axial" means the axial direction of the axial flux machine, and "radial" means the radial direction. In particular, the axial flux machine can provide drive torques via its rotor for propelling the motor vehicle, especially in a purely electric manner.

[0006] The stator has stator teeth, also simply referred to as teeth, arranged around its circumference. The characteristic that the stator teeth are arranged around the circumference of the stator means that the stator teeth are arranged consecutively and, for example, spaced apart from one another in the circumferential direction of the axial flux machine, with the circumferential direction of the axial flux machine running around the machine's axis of rotation and thus around the axial direction of the axial flux machine. In particular, the circumferential direction runs in a circumferential plane that is perpendicular to the machine's axis of rotation and thus perpendicular to the axial direction of the axial flux machine. The stator teeth are wound with at least one copper wire and are therefore also referred to as copper-wire-wound stator teeth.By wrapping the stator teeth with at least one copper wire, at least one winding of the stator is formed by the copper wire, which is also referred to as the stator winding. In particular, the copper wire, and thus the winding, is formed separately from the stator teeth and attached to the stator teeth, especially by being wound around the stator teeth. For example, the stator teeth are formed by a laminated core of the stator, also referred to as the stator core, so that the copper wire, and thus the winding, is formed separately from the laminated core and attached to the laminated core, and thus supported by the laminated core.

[0007] The stator teeth are arranged in the axial direction of the axial flux machine between two axially spaced end covers of the housing, in particular such that the stator teeth are at least partially overlapped, i.e. covered, in a first direction coinciding with the axial direction and running from a first end cover to a second end cover, and in a second direction coinciding with the axial direction, opposite to the first direction and running from the second end cover to the first end cover.

[0008] The stator also has at least one busbar that extends circumferentially around the stator and thus around the axis of rotation of the axial flux machine as a whole, at least over a certain angular range, wherein the angular range is, for example, at least 180 degrees and preferably greater than 180 degrees, in particular greater than 270 degrees. In particular, the angular range is greater than 300 degrees, in particular greater than 340 degrees, and the angular range can, for example, be 360 ​​degrees. Thus, it is conceivable that the busbar extends completely around the stator in the circumferential direction.In particular, it is provided that the busbar extends circumferentially around the stator at least over the angular range surrounding the stator teeth and / or the winding or copper wire, so that, for example, the winding or copper wire and / or the stator teeth are at least partially and at least over the angular range surrounded by the busbar circumferentially around the stator. The copper wire, and thus the winding, can be supplied with electrical energy, i.e., with electric current, via the busbar. Using this electrical energy and the coil, a magnetic field can be generated, for example, by means of which the rotor can be driven and thus rotated around the machine's axis of rotation relative to the stator. The housing and the stator are components of a stator assembly of the axial flux machine, whose stator assembly, and thus the housing, surrounds the stator.

[0009] The axial flux machine also has a sealing device, also referred to as a sealing assembly, which includes at least one sealing element, also referred to as a sealing element or seal. In particular, the sealing element is designed separately from the stator assembly, i.e., separately from the housing and separately from the stator. The sealing element extends axially along the axial flux machine from one of the end caps, in particular continuously and thus without interruption, to the other end cap, so that the sealing element has a longitudinal extension extending from one end cap to the other, in particular continuously, and extending axially along the axial flux machine.The longitudinal extent of the sealing element is thus so long or so large that the sealing element extends continuously and therefore without interruption from one end cap to the other end cap and thus rests against the end caps, particularly directly. The housing, in particular an inner circumferential surface of the housing, defines, for example, a receiving space, particularly directly, wherein the stator is arranged in the receiving space. The receiving space is, for example, at least partially, in particular at least predominantly and thus at least more than halfway or completely, defined in the first direction by the second end cap, particularly directly, and the receiving space is, for example, at least partially, in particular at least predominantly and thus at least more than halfway or completely, defined in the second direction by the first end cap, particularly directly.Thus, for example, the first end cap forms a first part of the inner circumferential surface, and the second end cap forms a second part of the inner circumferential surface, wherein the receiving space is at least partially bounded in the first direction by the second part, in particular directly, and wherein, for example, the receiving space is at least partially bounded in the second direction by the first part, in particular directly. The first part is formed, for example, by a first end face of the first end cap, or the first part of the inner circumferential surface is the first end face of the first end cap. The second part is formed, for example, by a second end face of the second end cap, or the second part is a second end face of the second end cap.The end faces of the axial flux machine are oriented towards each other in the axial direction, with the first and second end faces facing the receiving chamber in the axial direction. It is specifically designed that the sealing element bears axially against both end faces and thus against both end caps, i.e., against the portions of the inner circumferential surface, particularly directly. This prevents, for example, unwanted leakage, especially preventing a fluid, particularly a liquid, from flowing in the circumferential and radial directions of the axial flux machine between the sealing element and the respective end cap, and especially the respective end face.For example, the first end face lies in a first end-face plane, wherein the end-face planes are parallel to each other, perpendicular to the axial direction, and spaced apart from each other in the axial direction. In particular, each end face is thus a respective axial end face of the respective end cap.

[0010] Furthermore, according to the invention, the sealing element has an oval cross-section, particularly when viewed in a cross-sectional plane, wherein the cross-sectional plane is perpendicular to the machine's axis of rotation, and thus perpendicular to the axial direction. The oval cross-section allows for a particularly advantageous seal to be achieved by means of the sealing element. The sealing element seals an annular gap, also simply referred to as a gap, arranged in the radial direction of the axial flux machine between two components of the stator assembly, in particular such that, for example, the sealing element bears directly against both a first component and a second component in the radial direction.In particular, the annular gap is bounded radially outwards, especially directly, by a first surface of the first component and radially inwards, especially directly, by a second surface of the second component, wherein it is preferably provided that the sealing element bears against the first surface and the second surface in the radial direction, especially directly in each case. A particularly advantageous seal can be achieved by means of the sealing element and thus by means of the sealing device, in particular in that both the aforementioned leakage and further leakages can be avoided, especially in that the fluid in question can be prevented from flowing undesirably between the components, i.e., between the respective component and the sealing element.This allows the preferably liquid fluid to be guided or directed particularly advantageously, so that a particularly advantageous fluid guidance can be achieved.

[0011] The fluid in question is, for example, a liquid lubricant and / or coolant, such as oil, which can be used to lubricate and / or cool at least a portion of the axial flux machine. This portion of the axial flux machine can be supplied with the fluid effectively, efficiently, and as needed, since the sealing element allows the fluid to be guided as required. Because the sealing element prevents both unwanted leaks and unwanted fluid flow, it is also referred to as a blocker.

[0012] According to the invention, it is further provided that the cross-section, in particular at least or exactly, has an opening that extends at least over a partial region of an axial extent of the stator teeth in the sealing element, i.e., within the sealing element. Thus, the opening extends at least over a partial region of the longitudinal extent of the sealing element. In particular, it is provided that the opening extends over the entire longitudinal extent of the sealing element and thus over the entire axially extending length of the sealing element, so that, considering only the sealing element, the opening opens into the surroundings of the sealing element at both a first end of the sealing element and at a second end of the sealing element opposite the first end in its longitudinal extent.Thus, the opening is designed, for example, as a through-hole that completely penetrates the sealing element along its entire longitudinal extent. Since the cross-section includes the opening, advantageous compressibility and / or elastic deformability of the sealing element can be achieved, enabling an effective seal.

[0013] Along its longitudinal extent, the sealing element terminates at its aforementioned ends. Preferably, the opening at least at one end of the sealing element, and in particular at both ends, opens into the surrounding area of ​​the sealing element, especially when considering the sealing element alone. This allows for advantageous assembly of the sealing element. For example, a tool can be inserted into the opening, and thus into the sealing element, particularly through one end.While the tool is inserted into the opening and thus into the sealing element, the sealing element can, for example, be rotated relative to the stator assembly by means of the tool about an axis of rotation parallel to the machine's axis of rotation or parallel to the axial direction, and thereby moved into a final assembly position in which the components are advantageously sealed against each other by means of the sealing element, thus advantageously sealing the annular gap.

[0014] To enable the sealing element to be rotated around the axis of rotation relative to the stator assembly using the tool, it is preferably provided that the opening, particularly when viewed in the cross-sectional plane, has a shape other than circular, in particular angular, and most especially polygonal, for example, rectangular, which advantageously allows torques to be transmitted between the tool and the sealing element. Using these torques, the sealing element can be rotated around the axis of rotation relative to the stator assembly in the manner described, and thus easily and therefore quickly and cost-effectively mounted, and thus moved into the final assembly position. It is conceivable that both components are components of the stator. It is also conceivable that one of the components is a component of the stator, while the other component is a component of the housing.This allows for a particularly advantageous fluid guidance, that is, a particularly advantageous guidance of the fluid.

[0015] In order to achieve a particularly advantageous seal and thus a particularly advantageous fluid guidance, it is provided in a further embodiment of the invention that the sealing element is elastically deformable.

[0016] It has proven particularly advantageous if the sealing element is elastically deformed and arranged in the annular gap. This ensures that the sealing element fits particularly well against the components, resulting in a particularly effective seal of the annular gap.

[0017] In a further embodiment of the invention, the sealing element is formed from an elastomer, which allows the annular gap to be sealed particularly effectively. To achieve a particularly advantageous seal of the annular gap and thus a particularly advantageous fluid flow, a further embodiment of the invention provides that the sealing element bears directly against the components in the radial direction of the electric machine, i.e., the axial flux machine.

[0018] A further embodiment of the invention is characterized in that one of the components is the housing. This allows the fluid to be guided particularly advantageously and according to requirements.

[0019] It has proven particularly advantageous if the sealing element rests directly against the inner circumferential surface of the housing or directly against an outer circumferential surface of the housing. This allows the fluid to be guided in a particularly demand-oriented manner.

[0020] In order to achieve a particularly advantageous fluid guidance, it is further embodiment of the invention provided that the other component is a plastic overmolding, by means of which the stator teeth and / or the copper wire and / or the busbar are each at least partially overmolded.

[0021] Furthermore, it has proven particularly advantageous for realizing a particularly advantageous fluid guidance if the other component is one of the stator teeth or the copper wire, thus comprising at least one of the stator teeth or several stator teeth and / or the copper wire.

[0022] A second aspect of the invention relates to a motor vehicle, also simply referred to as a vehicle, which is preferably designed as a motor car, in particular as a passenger car. The motor vehicle has at least one axial flux machine according to the first aspect of the invention and can be driven electrically by means of the axial flux machine, in particular purely electrically. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention and vice versa.

[0023] For example, the fluid flows or streams, at least during operation of the axial flux machine, thus forming a flow or stream. Particularly when the fluid is oil, the flow is also referred to as oil flow and the stream as oil flow. Preferably, the sealing element has an oval cross-section, and in particular, an oval, or elliptical, shape on its outer circumference, especially when the sealing element is completely undeformed. In other words, the feature that the cross-section is oval means that the cross-section of the sealing element is oval, or in particular, elliptical, when the sealing element is completely undeformed.The undeformed state of the sealing element is understood to be a state of the sealing element in which no external forces act on the sealing element that elastically deform the sealing element.

[0024] In other words, the cross-section of the sealing element, particularly in its completely undeformed state, has the shape of an oval, especially an ellipse. Since the sealing element is preferably formed separately from the stator assembly and arranged in the annular gap, and thus radially between the components, the sealing element is an oval, particularly elliptical, sealing insert. The sealing element can be made, for example, of an elastomer or another compressible and, in particular, elastically deformable material, especially rubber-elastic. In particular, the sealing element is arranged between the end caps such that it is compressed in the axial direction, in particular elastically compressed and thus compressed. This allows the sealing element to bear particularly well against the end caps, especially the end faces.In particular, it is provided that, in the completely undeformed state of the sealing element, and especially in the fully extended state of the sealing element, a first axially extending length of the sealing element is greater than or equal to a second axially extending length of the receiving space, also referred to as the interior or stator interior, wherein the second length of the receiving space is, for example, an axially extending distance between the end faces. The sealing element seals the annular gap in order to, for example, impede the flow of fluid into the annular gap for the purpose of guiding the fluid, thereby, for example, increasing the hydraulic resistance for the fluid.The annular gap is formed or limited, particularly in the radial direction, on the one hand by an inner surface of a housing ring of the housing and on the other hand by the aforementioned plastic overmolding, so that, for example, the sealing element rests directly against the inner surface of the housing ring and against the plastic overmolding, in particular directly in each case. Since, for example, the busbar extends at least partially around the axial flux machine in the circumferential direction, the busbar is designed, for example, as a ring or as a switching ring.Furthermore, it is conceivable that the annular gap is arranged between the aforementioned inner surface of the housing ring and the winding (also referred to as the coil) and / or at least one of the stator teeth, so that the sealing element rests on the inner surface, particularly directly, and on the coil or stator tooth, respectively. It is also conceivable that the annular gap extends radially between the coil and / or at least one of the stator teeth and an outer surface of the housing ring and / or an inner ring of the housing, so that, for example, the sealing element rests directly on the outer surface and on the coil or stator tooth, respectively.Furthermore, it is conceivable that the annular gap is arranged between the aforementioned outer surface and the plastic overmolding, so that the sealing element is in contact with the outer surface on the one hand, in particular directly, and with the plastic overmolding on the other hand, in particular directly.

[0025] Particularly when the cross-section is oval in shape, forming an ellipse, the ellipse is defined by its major axis and its minor axis, which runs perpendicular to the major axis. The minor axis is preferably short enough to allow the sealing element to be inserted into the annular gap, also known as the sealing gap, especially in the axial direction. The major axis is long enough to allow contact and compression of the sealing element with the components that define or delimit the annular gap to be sealed during the rotation described above. For example, the sealing element is rotated about its axis of rotation by at least or exactly 90 degrees relative to the components using the tool.

[0026] The sealing element is preferably made of a compressible, in particular elastic, and especially rubber-elastic, deformable material, particularly the aforementioned elastomer. Besides its sealing effect, the compressible material also has the advantage of compensating for dimensional tolerances of gap-forming, and thus gap-limiting, surfaces, especially those of the components. Furthermore, grooves in the winding can be sealed, particularly when the annular gap is located on at least one side of the winding. The latter cannot be achieved with a rigid, non-rubber-elastic material. In the final assembly position, the sealing element assumes a sealing position or state in which it is held in position, for example, by the compressive forces of the material and the friction resulting from these forces.Holding the sealing element in position, i.e., in its final assembly position, can be facilitated by a suitable shape of the surfaces defining the annular gap, particularly those directly bounding it and also referred to as mating surfaces. For example, either the plastic overmolding or the inner surface of the housing can have a negative-like elliptical shape to ensure stable and permanent positioning of the sealing insert. In other words, it is conceivable that at least one of the aforementioned surfaces of the components, against which the sealing element rests, especially directly, has a shape adapted to the oval, especially elliptical, shape of the cross-section or of the sealing element. This allows the sealing element to engage with one of the surfaces.In other words, the sealing element, for example, interacts with one surface in a form-fitting manner, thus preventing unwanted relative movement between the sealing element and the respective component. This ensures a particularly effective seal.

[0027] Further advantages, features, and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and combinations of features mentioned above in the description, as well as those mentioned below in the figure description and / or shown in the figures alone, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention.

[0028] The drawing shows in: Fig. 1. Partial schematic front view of an axial flux machine for a motor vehicle, with a sealing element which is located in Fig. 1 is in a final assembly position of the sealing element; and Fig. 2. Partially shown is another schematic front view of the axial flux machine, in which the sealing element is in a pre-assembly position different from the final assembly position; Fig. 3. Partially a schematic longitudinal section view of the axial flux machine; Fig. 4. Partially shown is another schematic front view of the axial flux machine; Fig. 5 a schematic perspective view of a stator of the electric machine; and Fig. 6 A schematic perspective view of a busbar of the axial flux machine, in particular of the stator.

[0029] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0030] Fig. Figure 1 shows a partial schematic front view of a Fig. Figure 3 shows a partial schematic longitudinal sectional view of an axial flux machine 10 of a motor vehicle. The axial flux machine 10 has a stator assembly 12, which comprises a housing 14 and a stator 18 arranged in the housing 14. The housing 14, and thus the stator assembly 12, has two end covers, also referred to simply as covers: a first end cover 20 and a second end cover 22. The end covers 20 and 22 are spaced apart from each other in the axial direction of the axial flux machine 10. The housing 14 has, for example, a housing part 24. The end covers 20 and 24 are formed separately from each other and separately from the housing part 24, wherein, for example, the end covers 20 and 22 and the housing part 24 each directly and partially define a receiving space 26. The stator 18 is arranged in the receiving space 26.In particular, the receiving space 26 in the axial direction of the axial flux machine 10 is formed at least partially and preferably directly on both sides by the end covers 20 and 22.

[0031] Out of Fig. 4 and Fig. Figure 5 shows that the stator 18 has stator teeth 28, also referred to simply as teeth, arranged around its circumference and wrapped with at least one copper wire. The copper wire thus forms, for example, at least one winding of the stator 18, the winding of which is also referred to as the stator winding. The stator teeth 28 are arranged in the axial direction of the axial flux machine 10 between the end caps 20 and 22, which are spaced apart from each other in the axial direction of the axial flux machine 10.

[0032] Out of Fig. 3, Fig. 5 and Fig. 6 shows that the stator 18 also has a busbar 30 which rotates at least partially around the circumference of the stator 18 and thus of the axial flux machine 10 as a whole, via which the copper wire and thus the winding can be supplied with electrical energy.

[0033] The axial flux machine 10 also exhibits a particularly good Fig. 1 to 3 recognizable sealing device 32, which has at least one sealing element 34. How particularly good from Fig. As can be seen in Figure 3, the sealing element 34 extends in the axial direction of the axial flux machine 10 from the end cover 20, in particular continuously and thus without interruption, to the end cover 22 and vice versa, so that the sealing element 34 bears directly against the end covers 20 and 22. The end cover 20 has a first axial end face 36, and the end cover 22 has a second axial end face 38, wherein the axial end faces 36 and 38 face each other in the axial direction of the axial flux machine 10 and face the receiving space 26. The sealing element 34 bears directly against the end faces 36 and 38 in each case.

[0034] Out of Fig. 1 and Fig. It is evident from Figure 2 that the sealing element 34, at least in a state of, and especially in a completely undeformed state, has an oval, and in particular elliptical, cross-section, which is thus formed in the shape of an oval, and in particular an ellipse. The cross-section has an opening 40 arranged within the sealing element 34 and extending at least over a partial region of an axial extension of the stator teeth 28, which opens, for example, at at least one end E1 of the sealing element 34 into the surroundings of the sealing element 34. The sealing element 34 has its first end E1 and a second end E2 opposite the first end E1 and terminates, in particular when viewed in the axial direction of the axial flux machine 10, at its ends E1 and E2.The sealing element 34 seals an annular gap R, also referred to simply as a gap or sealing gap, arranged radially in the axial flux machine 10 between two components of the stator assembly 12, in particular by the sealing element 34 bearing directly against the components in the radial direction. Specifically, the components are separate from the end caps 20 and 22 and are additional components provided.

[0035] In the embodiment shown in the figures, one of the components is the housing part 24, wherein the annular gap R is bounded outwards in the radial direction of the axial flux machine 10, in particular directly, by a first surface O1 of the housing part 24. The surface O1 is at least a part of a circumferential surface of the housing part 24, and thus of the housing 12, particularly on the inner circumference. The sealing element 34 rests directly against the surface O1, particularly in the radial direction of the axial flux machine 10. A second component is a solid plastic overmolding 39, with which at least a partial area of ​​the busbar 30 is overmolded.The annular gap R is limited in the radial direction of the axial flux machine 10 inwards, in particular directly, by the plastic overmolding 39, in particular a circumferential surface 42 of the plastic overmolding 39, wherein, for example, the sealing element 34 bears against the circumferential surface 42 of the plastic overmolding 39 in the radial direction of the axial flux machine 10, in particular directly.

[0036] For example, the stator teeth 28 are wound with at least or exactly three copper wires, which are formed separately from one another: the aforementioned copper wire as the first copper wire, a second copper wire, and a third copper wire. The first copper wire forms, for example, the aforementioned winding as the first winding. The second copper wire forms, for example, a second stator winding of the stator 18, also referred to as the second winding, and the third copper wire forms, for example, a third stator winding of the stator 18, also referred to as the third winding. It is conceivable that the stator 18 has the busbar 30 as the first busbar, via which, for example, the first copper wire and thus the first winding can be supplied with electrical energy.The stator 18 can have a second busbar, which is formed separately from the first busbar 30, and, for example, a third busbar, which is formed separately from both the first and second busbars. The second copper wire, and thus the second winding, can be supplied with electrical energy via the second busbar, and the third copper wire, and thus the third winding, can be supplied with electrical energy via the third busbar. In particular, the three windings form three distinct phases of the axial flux machine 10. It is conceivable that at least certain sections of the busbars are overmolded with the plastic overmolding 39, thereby holding the busbars together and / or to the windings. Thus, it is conceivable, for example, that the busbar 30 is held to the winding by means of the plastic overmolding 39.

[0037] In Fig. Figure 4 shows arrows illustrating the flow of a preferably liquid fluid, which is preferably an oil. Preferably, the fluid is a component of the axial flux machine 10. The fluid is, for example, a lubricant and / or coolant, by means of which at least a partial area of ​​the axial flux machine 10 is to be lubricated and / or cooled. Since the annular gap R is advantageously sealed by means of the sealing element 34, undesired flows and leaks of the fluid can be avoided, so that a demand-oriented and targeted flow of the fluid, and thus a demand-oriented and targeted fluid supply, is possible. This allows, for example, at least the partial area to be supplied with the fluid particularly advantageously, selectively, and as required.

[0038] Fig. Figure 1 shows the sealing element 34 in a final assembly position. The outer surface 42 is or forms a second surface O2 of the plastic overmolding 39, with the sealing element 34 directly abutting surface O2. It is also evident that surface O1 is formed, for example, by a ring of the housing 12, in particular of the housing part 24, which is also referred to as a housing ring.

[0039] Fig. Figure 2 shows the sealing element 34 in a pre-assembly position different from the final assembly position. For example, the sealing element 34 is mounted such that it is inserted axially between the components of the axial flux machine 10 and thereby into the annular gap R, such that the sealing element 34 initially assumes its pre-assembly position. For example, a tool is inserted into the opening 40 in the axial direction of the axial flux machine 10, particularly via the end E1. By means of the tool inserted into the opening 40, the sealing element 34 is rotated about an axis of rotation relative to the stator assembly 12 and thereby moved from the pre-assembly position to the final assembly position. For example, the sealing element 34 is elastically deformed in the final assembly position, so that the sealing element 34 is arranged in the annular gap R in an elastically deformed state.It is also evident that the annular gap R is formed directly through the surface O1 in the radial direction of the axial flux machine 10 towards the outside and directly through the surface O2 in the radial direction of the axial flux machine 10 towards the inside.

[0040] Because the cross-section of the sealing element 34 is oval, in particular elliptical, and thus has the shape of an oval, in particular an ellipse, the sealing element 34 is oval, in particular elliptical, on its outer circumference, so that the sealing element 34 is formed in the shape of an oval, in particular an ellipse, on its outer circumference. This is evident from Fig.2. The surface O2, and thus in this case the plastic overmolding 39, has a recess 44 which has a shape adapted to the outer circumferential shape of the sealing element 34, such that the outer circumferential shape of the sealing element 34 is a positive contour or positive form, and the shape of the recess 44 is a negative contour or negative form adapted to the positive contour or positive form. In the final assembly position, the sealing element 34 engages in the recess 44 and thus in the plastic overmolding 39, thereby preventing undesired relative movements between the sealing element 34 and the stator assembly 12.

[0041] It is evident that the opening 40, particularly when viewed in a cross-sectional plane in which the cross-section is also oval, in particular elliptical, and the outer circumferential shape of the sealing element 34 is oval, in particular elliptical, exhibits a shape other than a circular one, and in this case, the shape of a polygon, in particular a quadrilateral. This allows torques to be transmitted particularly advantageously between the sealing element 34 and the tool inserted into the opening 40 and thus into the sealing element 34. This enables the sealing element 34 to be rotated about the axis of rotation relative to the stator assembly 12 by means of the tool, and thus moved from the pre-assembly position to the final assembly position. This allows for simple and therefore time- and cost-effective assembly of the sealing element 34. Reference symbol list 10 Axial flux machine 12 Stator assembly 14 cases 18 Stator 20 end caps 22 End caps 24 Housing part 26 Recording room 28 Stator tooth 30 busbar 32 Sealing device 34 Sealing element 36 Front surface 38 Front surface 39 Plastic overmolding 40 Opening 42 Surface area 44 Exclusion E1 End E2 End O1 surface O2 surface R annular gap QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2008 019 925 A1

[0002]

Claims

[1] Axial flux machine (10) for a motor vehicle, comprising a stator assembly (12) which has a housing (14) and a stator (18) arranged in the housing (14), which has stator teeth (28) arranged around its circumference and wound with at least one copper wire, which are arranged in the axial direction of the axial flux machine (10) between two end covers (20, 22) of the housing (14) spaced apart from each other in the axial direction of the axial flux machine (10), and has at least one busbar (30) rotating circumferentially around the stator (18) via which the copper wire can be supplied with electrical energy, and a sealing device (32) which has at least one sealing element extending in the axial direction of the axial flux machine (10) from one of the end covers (20, 22) to the other end cover (22, 20) and thereby bearing against the end covers (20, 22),has an oval cross-section with a sealing element (34) extending at least over a partial region of an axial extension of the stator teeth (28), by means of which an annular gap (R) arranged in the radial direction of the axial flux machine (10) between two components of the stator assembly (12) is sealed. [2] Axial flux machine (10) according to claim 1, characterized by , that the sealing element (34) is elastically deformable. [3] Axial flux machine (10) according to claim 2, characterized by , that the sealing element (34) is elastically deformed and arranged in the annular gap (R). [4] Axial flux machine (10) according to any one of the preceding claims, characterized by , that the sealing element (34) is made of an elastomer. [5] Axial flux machine (10) according to any one of the preceding claims, characterized by, that the sealing element (34) is in direct contact with the components in the radial direction of the axial flux machine (10). [6] Axial flux machine (10) according to any one of the preceding claims, characterized by , that one of the components is the housing (14). [7] Axial flux machine (10) according to claim 6, characterized by , that the sealing element (34) is directly in contact with an inner circumferential surface (01) of the housing (14) or with an outer circumferential surface of the housing (14). [8] Axial flux machine (10) according to claim 6 or 7, characterized by , that the other component is a plastic overmolding (39) with which the stator teeth (28) and / or the copper wire and / or the busbar (30) is overmolded. [9] Axial flux machine (10) according to claim 6 or 7, characterized by , that the other component is one of the stator teeth (28) or the copper wire, or at least includes one of the stator teeth (28) and / or the copper wire. [10] Motor vehicle, comprising at least one axial flux machine (10) according to any of the preceding claims.

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