Electric machine for a motor vehicle, motor vehicle, method for producing an electric machine for a motor vehicle, and rotor for an electric machine

Abstract

The invention relates to an electric machine (1) for a motor vehicle, comprising a laminated core (5) as a first component and comprising at least one end plate (6) as a second component, said end plate adjoining an axial end face (AS1) of the laminated core (5) in the axial direction (9) of the electric machine (1), being provided on the axial end face (AS1), and being formed separately from the laminated core (5). One of the components is equipped with at least two hooks (8) which protrude from a base region (G) of the one component in the axial direction (9) of the electric machine (1), said hooks engaging into corresponding receiving areas (10) provided on the other component and engaging, in the axial direction (9) of the electric machine (1), behind wall regions (W) of the other component that delimit the receiving areas (10), whereby the end plate (6) is secured to the laminated core (5).

Description

[0001] Electric machine for a motor vehicle, motor vehicle, method for producing an electric machine for a motor vehicle and rotor for an electric machine

[0002] The invention relates to an electric machine for a motor vehicle according to the preamble of claim 1. The invention further relates to a motor vehicle having at least one such electric machine. The invention also relates to a method for manufacturing an electric machine for a motor vehicle. Furthermore, the invention relates to a rotor for an electric machine of a motor vehicle.

[0003] DE 102021 102 430 A1 discloses a rotor for an electric machine of a drive train. WO 2020 / 099048 A1 discloses a support device for a rotor of a separately excited internal rotor synchronous machine of an electrically driven motor vehicle. DE 102019 205 101 A1 discloses a method for producing an electromechanical component for an electric machine. Furthermore, EP 3669 439 B1 discloses a rotor for an electric machine. Furthermore, EP 2 793 365 A1 discloses a single-segment rotor. Furthermore, DE 102021 123673 A1 discloses a support device for a rotor of an electric machine.

[0004] The object of the present invention is to provide an electric machine for a motor vehicle, a motor vehicle having at least one such electric machine, a method for producing such an electric machine and a rotor for such an electric machine, so that the electric machine can be produced particularly advantageously.

[0005] This object is achieved according to the invention by an electric machine having the features of patent claim 1, by a motor vehicle having the features of patent claim 8, by a method having the features of patent claim 9, and by a rotor having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims. A first aspect of the invention relates to an electric machine for a motor vehicle, also simply referred to as a vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, has the electric machine in its fully manufactured state and can be driven, in particular purely electrically, by means of the electric machine.The electric machine is preferably a high-voltage component whose electrical voltage, in particular electrical operating or nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. The electric machine has, for example, a rotor and a stator, by means of which the rotor can be driven and is thus rotatable about a machine axis of rotation relative to the stator. For example, the electric machine can provide drive torques via its rotor for driving the motor vehicle, in particular purely electrically. Very particularly, the electric machine is designed as an internal rotor, i.e. as an internal rotor machine, which is also referred to as an internal rotor motor.Preferably, the electrical machine is designed as a separately excited and / or current excited synchronous machine, which is also referred to as a separately excited and / or current excited synchronous motor (SSM).

[0006] The electric machine has a laminated core. In principle, it would be conceivable for the laminated core to be a component of the stator, so that the laminated core is designed, for example, as a stator laminated core. However, it has proven particularly advantageous for the laminated core to be a component of the rotor, so that the laminated core is preferably designed as a rotor laminated core of the rotor. The laminated core is also referred to as the first component. In other words, the laminated core is a first component of the electric machine.

[0007] The electrical machine has at least one end plate which adjoins an axial end face of the laminated core in the axial direction of the electrical machine, the radial direction of which runs perpendicular to the axial direction of the electrical machine, so that in particular the end plate adjoins the laminated core in the axial direction of the electrical machine. The axial direction of the electrical machine coincides with the machine axis of rotation. The end plate is arranged, in particular directly, on the axial end face so that, for example, the end plate touches the axial end face, in particular directly. In addition, the end plate is formed separately from the laminated core. Thus, the laminated core is preferably formed separately from the end plate so that, for example, the end plate is not part of the laminated core.In particular, the end plate is supported directly on the axial end face of the electric machine, and thus of the rotor and stator, so that, for example, the end plate directly touches the axial end face of the laminated core. The axial direction of the electric machine coincides with the axial direction of the stator and the axial direction of the rotor. The end plate is a second component of the electric machine. In other words, the end plate is also referred to as the second component.

[0008] For example, the end plate can be a star plate, which is already disclosed, for example, in DE 102018 128 521 A1. In particular, the axial end face of the laminated core is understood to be an end face of the laminated core whose axial end face extends in a plane perpendicular to the axial direction of the electric machine and thus of the rotor and stator.

[0009] For example, the electrical machine has at least one winding, which can be, for example, a winding of the stator and thus a stator winding, or the winding is a winding of the rotor and thus a rotor winding.

[0010] For example, the winding, which is formed separately from the laminated core, is supported by the laminated core and thus secured to the laminated core, in particular by the winding being wound around at least a portion of the laminated core. For example, a magnetic field can be generated by the winding, in particular by applying an electrical voltage to the winding, by means of which the rotor can be driven and thus rotated about the machine's axis of rotation relative to the stator.

[0011] For example, the rotor has a shaft, particularly one formed separately from the laminated core, also referred to as the rotor shaft. Especially when the laminated core is a component of the rotor, the laminated core is arranged on the shaft. In particular, the laminated core is connected to the shaft in a rotationally fixed manner.

[0012] In order to be able to manufacture the electrical machine particularly advantageously, the invention provides that at least two hooks are provided on one of the components, projecting in the axial direction of the electrical machine from a base region of one component, which hooks engage in corresponding receptacles provided on the other component and engage behind wall regions of the other component, the wall regions of which delimit the receptacles, in particular directly, in the axial direction of the electrical machine, whereby the end plate is fastened, in particular directly, to the laminated core. The receptacles and the hooks engaging in the receptacles thus form a fastening which is designed, for example, as a bayonet catch or in the manner of a bayonet catch, wherein by means of the fastening, i.e. by means of the catch, the end plate is fastened, in particular directly, to the laminated core and is thus held.Said fastening enables advantageous and, in particular, captively secured holding of the end plate on the laminated core, particularly during a method for manufacturing the electrical machine, so that undesired, excessive relative movements between the end plate and the laminated core can be advantageously and easily avoided, particularly during the method for manufacturing the electrical machine. By means of the fastening, the end plate can be advantageously fixed, in particular pre-fixed, to the laminated core in such a way that excessive relative movements between the end plate and the laminated core are prevented, wherein, when the end plate is fastened to the laminated core by means of the hooks and the receptacles, undesirable effects such as the formation of chips and / or other undesirable particles can be avoided.

[0013] In the said method for producing the electrical machine, it is provided, for example, that in a first step of the method, the end plate is fastened to the laminated core by means of the hooks and the receptacles, in particular while the winding is not yet fastened to the laminated core. In a second step of the method, which follows the first step, the winding is fastened to the laminated core, in particular in such a way that the winding is wound at least around the said partial region of the laminated core. In this case, for example, the winding is also wound around at least a partial region of the end plate, so that the end plate is particularly firmly fastened to the laminated core, for example by means of the winding.It is therefore desirable, in the first step of the method, to fix the end plate, in particular in a captive manner, to the laminated core, in particular to pre-fix it, whereby the winding is not yet available for this purpose. The invention now makes it possible to fix the end plate to the laminated core in a particularly advantageous and in particular particularly simple manner, without using the winding for this purpose and in particular without undesirable effects occurring. The invention makes it possible, in particular in the first step of the method mentioned, to advantageously fasten, in particular pre-fix, the end plate to the laminated core, whereby this fastening of the end plate to the laminated core is robust with regard to tolerance fluctuations. Typically, pins made of a metallic material such as aluminum are used to fasten the end plate to the laminated core, in particular in the first step of the method mentioned.The pins are inserted into corresponding pockets, which results in a targeted scraping of the pins. For example, the pins are provided on the laminated core, so that the pockets are provided on the end plate. However, scraping the pins can result in chips that can subsequently impair the manufacture of the electrical machine if no appropriate countermeasures are taken. To prevent such undesirable impairment, complex measures may be necessary. The invention can prevent the formation of such particles or chips, thus also avoiding the need for appropriate countermeasures. The electrical machine can thus be manufactured quickly and cost-effectively.

[0014] In order to be able to manufacture the electrical machine particularly easily, and in particular particularly time- and cost-effectively, one embodiment of the invention provides that one component is the end plate and the other component is the laminated core. The receptacles can be integrated particularly easily into the laminated core. The laminated core is formed, for example, from sheet metal segments, which are also referred to as individual sheets and are produced, for example, by punching. During manufacture, in particular punching, of the sheet metal segments, the sheet metal segments can be manufactured particularly easily and thus time- and cost-effectively in such a way that the sheet metal segments form the receptacles when the laminated core is completely manufactured, so that the receptacles can be manufactured time- and cost-effectively.

[0015] The respective receptacle is or forms a respective undercut into which the respective hook engages, such that the respective hook engages behind the respective wall area, in particular the area directly bordering the respective undercut. In particular, the undercuts can be implemented particularly easily in the sheet stack.

[0016] In order to be able to advantageously fasten, in particular pre-fix, the end plate to the laminated core, particularly in the first step of the method and in particular without the aid of the winding, a further embodiment of the invention provides that the respective hook has a first longitudinal region extending in the axial direction away from the base region and a second longitudinal region adjoining, in particular directly, the first longitudinal region, so that preferably no other, further longitudinal region of the respective hook is arranged between the first longitudinal region and the second longitudinal region. The respective second longitudinal region runs in the radial direction of the electrical machine or obliquely to the radial direction of the electrical machine. The respective second longitudinal region runs obliquely or perpendicular to the respective first longitudinal region.In addition, the second length area engages behind the respective wall area in the axial direction of the electrical machine.

[0017] One of the hooks is also called the first hook, and the other hook is also called the second hook. In other words, one of the hooks is a first hook, while the other hook is a second hook.

[0018] It has proven particularly advantageous if the second longitudinal region of the first hook extends outwards in the radial direction of the electrical machine away from the first longitudinal region of the first hook, so that the second longitudinal region of the first hook extends in the radial direction of the electrical machine away from the machine's axis of rotation. It is preferably provided that the second longitudinal region of the second hook extends inwards in the radial direction of the electrical machine away from the first longitudinal region of the second hook, so that the second longitudinal region of the second hook preferably extends behind the machine's axis of rotation in the radial direction of the electrical machine.As a result, the end plate can be fixed, in particular pre-fixed, to the laminated core in a particularly time- and cost-effective manner, for example in the first step of the aforementioned method, in that the hooks are first inserted into the receptacles in the axial direction of the electrical machine, whereupon the end plate and thus the hooks are displaced in the radial direction of the machine relative to the laminated core, as a result of which the second longitudinal regions are pushed behind the wall regions and subsequently the second longitudinal regions and thus the hooks engage behind the wall regions in the axial direction of the electrical machine. The shaft is then mounted, for example, in particular in such a way that the laminated core and preferably also the end plate are arranged on the shaft.By mounting the shaft in this way, for example, the end plate is secured relative to the laminated core in the radial direction of the laminated core, so that, for example, the end plate and thus the hooks can no longer slip back in the radial direction of the electrical machine in such a way that the second longitudinal regions no longer engage behind the wall regions. Thus, the shaft or the mounting of the shaft radially secures the end plate and thus the hooks relative to the laminated core, whereupon, for example, the winding can be wound at least around the partial region of the laminated core and, for example, at least also around the partial region of the end plate. As a result, the end plate can be pre-fixed to the laminated core in a particularly simple and therefore time- and cost-effective manner during the method for manufacturing the electrical machine, so that the electrical machine can be manufactured particularly time- and cost-effectively.

[0019] In order to be able to fix, in particular pre-fix, the end plate to the laminated core particularly easily and thus in a time- and cost-effective manner, it is provided in a further embodiment of the invention that the respective second length region of the respective hook forms a respective free end of the respective hook, which ends at its respective free end.

[0020] Another design is characterized by the fact that the respective hook is made of a plastic material. This allows the respective hook to be manufactured quickly and cost-effectively.

[0021] It has proven particularly advantageous if the respective hook is manufactured by plastic injection molding, which means that the hooks can be manufactured and thus realized in a particularly time- and cost-effective manner.

[0022] Preferably, the hooks are formed integrally with one another, thus consisting of a single piece. In other words, it is preferably provided that the hooks are not formed separately from one another and connected to one another, but rather the hooks are preferably formed integrally with one another, i.e., formed from a single piece, so that the hooks are formed by a one-piece body, thus formed from a single piece and thus manufactured integrally and formed as a monoblock.

[0023] A second aspect of the invention relates to a motor vehicle, also simply referred to as a vehicle and preferably designed as a motor vehicle, in particular as a passenger car, which has at least one electrical machine according to the first aspect of the invention. 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. A third aspect of the invention relates to a method for producing an electrical machine, in particular according to the first aspect of the invention, for a motor vehicle. In the method according to the third aspect of the invention, a laminated core is provided as the first component. In addition, at least one end plate formed separately from the laminated core is provided as the second component.The end plate is arranged on an axial end face of the laminated core in such a way that the end plate is connected to the axial end face of the laminated core in the axial direction of the electrical machine and thus in particular to the laminated core as a whole.

[0024] In order to be able to manufacture the electrical machine in a particularly time- and cost-effective manner, the invention provides that at least two hooks are provided on one of the components, protruding from a base region of one component in the axial direction of the electrical machine, which hooks are brought into engagement with corresponding receptacles provided on the other component and thereby engage behind the receptacles, in particular directly, delimiting wall regions of the other component in the axial direction of the electrical machine, whereby the end plate is fastened, in particular directly, to the laminated core. Advantages and advantageous embodiments of the first aspect and the second aspect of the invention are to be regarded as advantages and advantageous embodiments of the third aspect of the invention, and vice versa.

[0025] A fourth aspect of the invention relates to a rotor for an electrical machine, in particular according to the first aspect of the invention, of a motor vehicle. The rotor according to the fourth aspect of the invention has a laminated core as the first component. Furthermore, the rotor according to the fourth aspect of the invention has at least one end plate which, in the axial direction of the rotor, adjoins an axial end face of the laminated core and thus, for example, adjoins the laminated core as a whole, is arranged on the axial end face and is formed separately from the laminated core, and which is a second component of the rotor or is also referred to as a second component.

[0026] In order to be able to manufacture the rotor and thus the electric machine in a particularly time- and cost-effective manner, the invention provides that on one of the components, in particular on the end plate, at least two hooks are provided which protrude in the axial direction of the rotor from a base region of one component, which hooks engage in corresponding receptacles provided on the other component, in particular on the laminated core, and engage behind the receptacles, in particular directly, delimiting wall regions of the other component in the axial direction of the rotor, whereby the end plate is fastened, in particular directly, to the laminated core. Advantages and advantageous embodiments of the first aspect, the second aspect, and the third aspect of the invention are to be regarded as advantages and advantageous embodiments of the fourth aspect of the invention, and vice versa.

[0027] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. In the drawings:

[0028] Fig. 1 shows a partial schematic and sectional perspective view of an electrical machine for a motor vehicle;

[0029] Fig. 2 is a schematic longitudinal sectional view of a rotor of the electric

[0030] Machine;

[0031] Fig. 3 shows a further schematic longitudinal section of the

[0032] Rotors;

[0033] Fig. 4 is a schematic diagram illustrating a method for manufacturing the electrical machine, in particular the rotor; and

[0034] Fig. 5 is a further schematic diagram to further illustrate the process.

[0035] In the figures, identical or functionally identical elements are provided with the same reference numerals.

[0036] Fig. 1 shows a detail in a schematic and sectional perspective view of an electric machine 1 for a motor vehicle, also simply referred to as a vehicle. This means that the motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state has the electric machine 1 and can be driven by means of the electric machine 1, in particular purely electrically. The electric machine 1 has a stator 2, shown in detail and particularly schematically in Fig. 1, and a rotor 3, which can be driven by means of the stator 2 and is therefore rotatable about a machine axis of rotation 4 relative to the stator 2. In particular, the electric machine 1 can provide drive torques via its rotor 3 for driving the motor vehicle, in particular purely electrically.

[0037] The rotor 3 and thus the electric machine 1 have a laminated core 5, which is preferably manufactured using so-called baked varnish technology. This means that the laminated core 5 preferably has, in particular, individual laminated core segments, which are also referred to as individual laminates or are designed as individual laminates. For example, the laminated core segments are or will be produced by stamping. In addition, for example, the laminated core 5 has a baked varnish. The baked varnish is a varnish that is designed as an adhesive varnish and an insulating varnish. The baked varnish glues the laminated core segments together and thereby connects them to one another, i.e., bakes them together. In addition, for example, the laminated core segments are electrically insulated from one another by means of the baked varnish. Since the laminated core 5 is manufactured using baked varnish technology, the laminated core 5 forms or is an advantageous, in particular solid, block.The laminated core 5 is also referred to as the first component. In other words, the laminated core 5 is a first component of the rotor 3 and thus of the electric machine 1.

[0038] The rotor 3 and thus the electric machine 1 also have at least one end plate 6 which is formed separately from the laminated core 5 and which, in the exemplary embodiment shown in the figures, is designed as a star plate. In addition, the rotor 3 and thus the electric machine 1 have a shaft 7 which is formed, for example, separately from the laminated core 5 and separately from the end plate 6 and which is also referred to as the rotor shaft. It can be seen that the laminated core 5 and the end plate 6 are arranged on the shaft 7. The laminated core 5 is formed separately from the shaft 7 and is connected to the shaft 7 in a rotationally fixed manner. For example, the end plate 6 is formed separately from the shaft 7, wherein, for example, the end plate 6 is connected to the shaft 7 in a rotationally fixed manner. In particular, the rotor 3 can provide the drive torques via the shaft 7.It can be seen that the end plate 6 adjoins an axial end face AS1 of the laminated core 5 in the axial direction of the rotor 3 and thus of the electric machine 1 and is arranged on the axial end face AS1, in particular in such a way that the end plate 6 is supported, in particular directly, on the axial end face AS1, and thus bears against it.

[0039] The rotor 3 and thus the electric machine 1 also have a winding (not shown in the figures), which is supported by the laminated core 5 and thereby fastened to the laminated core 5. For example, the winding is wound around at least a partial area of ​​the laminated core 5 and is thereby fastened to the laminated core 5. Furthermore, it is conceivable that the winding is wound around at least a partial area of ​​the end plate 6.

[0040] Fig. 4 and Fig. 5 illustrate a method for producing the rotor 3, wherein, for example, the method for producing the rotor 3 is carried out in the method for producing the electrical machine 1. In the method for producing the electrical machine 1 or the rotor 3, it is desirable to fasten and thus fix, in particular pre-fix, the end plate 6 to the laminated core 5 without the aid of the winding, i.e. in a state in which the winding is not yet wound around the laminated core 5 and not yet around the end plate 6.

[0041] In order to be able to fasten and thus fix, that is to say pre-fix, the end plate 6 to the laminated core 5 in a particularly time- and cost-effective manner and without causing undesirable effects, in particular without the aid of the winding, at least or exactly two hooks 8 are provided on the end plate 6, as can be seen particularly well in Figs. 2 and 3, which hooks 8 protrude in the axial direction of the rotor 3 and thus of the electrical machine 1 from a base region G of the end plate 6 and in particular towards the laminated core 5. The axial direction of the rotor 3 and thus of the electrical machine 1 coincides with the machine axis of rotation 4 and is illustrated by a double arrow 9. The respective hook 8 engages in a respective corresponding receptacle 10 provided on the laminated core 5. In the case of the embodiment shown in Figs.In the exemplary embodiment shown, the respective receptacle 10 is provided on the laminated core 5 in such a way that the respective receptacle 10 is formed in the laminated core 5, as a result of which, for example, the respective receptacle 10 is integrated into the laminated core 5. It can be seen that the respective receptacle 10 is directly delimited by a respective wall region W of the laminated core 5 in the axial direction of the rotor 3 and, as viewed towards the end plate 6. The hooks 8 engage behind the wall regions W in the axial direction of the rotor 3 and thus of the electrical machine 1, as a result of which the end plate 6 is fastened, in particular directly, to the laminated core 5. It can be seen particularly clearly from Figs. 2 and 3 that the respective receptacle 10 is a respective undercut or forms a respective undercut. The respective hook 8 engages in the respective undercut and, in doing so, engages behind the respective wall W in the axial direction of the rotor 3.3 and 5 it can be seen that the respective hook 8, also referred to as the respective pin or respective nose, has a respective first length range L1 and a respective second length range L2, wherein the respective length range L2 directly adjoins the respective length range L1. One of the hooks 8 is also referred to as the first hook H1, wherein the other hook 8 is also referred to as the second hook H2. The respective first length range L1 extends in the axial direction of the rotor 3 and thus of the electric machine 1 away from the base region G and in particular towards the laminated core 5. In the exemplary embodiment shown in the figures, the respective second length range L2 runs in the radial direction of the rotor 3, the radial direction of which runs perpendicular to the axial direction and is illustrated by a double arrow 11. In this case, the respective second length range L2 runs perpendicular to the respective first length range L1.In addition, the respective second length region L2 engages behind the respective wall region W in the axial direction of the rotor 3 and thus of the electric machine 1, the radial direction of which coincides with the radial direction of the rotor.

[0042] In the exemplary embodiment shown in the figures, the hooks 8 are designed such that the length range L2 of the first hook H1 extends away from the length range L1 of the hook H1 in the same direction, running obliquely or, in this case, parallel to the radial direction of the rotor 3, in which the second length range L2 of the second hook H2 also extends away from the first length range L1 of the second hook H2. Thus, in the exemplary embodiment shown in the figuresIn the exemplary embodiment shown, it is provided that the second longitudinal region L2 of the first hook H1 extends outwards in the radial direction of the electrical machine 1 and thus of the rotor 3 from the first longitudinal region L1 of the first hook H1 and away from the machine rotation axis 4, wherein the second longitudinal region L2 of the second hook H2 extends inwards in the radial direction of the rotor 3 and thus of the electrical machine 1 and thus towards the machine rotation axis 4 from the first longitudinal region L1 of the second hook H2. Thus, in the aforementioned method for producing the rotor 3 illustrated in Fig. 4, the end plate 6 is fastened to the laminated core 5, in particular without the aid of the winding, and in particular pre-fixed, in the following way:

[0043] In a first step S1 of the method for producing the rotor 3, the end plate 6 and thus the hooks 8 - as illustrated in Fig. 4 by arrows 12 - are moved translationally in the axial direction of the rotor 3 relative to the laminated core 5 such that the hooks 8 are inserted into the receptacles 10. After the first step S1 and before a second step S2 of the method which follows the first step S1, the hooks 8 are thus arranged in the receptacles 10, but without the hooks 8 engaging behind the wall regions W. In the subsequent second step S2 of the method, the end plate 6 and thus the hooks 8, as shown in Fig.4 is illustrated by an arrow 13, is displaced in the radial direction of the rotor 3 and thus of the electrical machine 1 relative to the laminated core 5 in such a way that the hooks 8, in particular the second longitudinal regions L2, are pushed behind the wall regions W and subsequently the hooks 8, in particular the longitudinal regions L2, engage behind the wall regions W in the axial direction of the rotor 3 and thus of the electrical machine 1. During steps S1 and S2, for example, the laminated core 5 and the end plate 6 are not yet arranged on the shaft 7, and therefore the shaft 7 is not yet mounted on the laminated core 5 and not yet on the end plate 6. Furthermore, it is provided that during steps S1 and S2 the aforementioned winding is not yet mounted on the laminated core 5 and not yet on the end plate 6.

[0044] In a third step S3 of the method, which follows the second step S2, the shaft 7, for example, is mounted on the laminated core 5 and on the end plate 6, in particular in such a way that the laminated core 5 and the end plate 6 are arranged on the shaft 7. By arranging the laminated core 5 and the end plate 6 on the shaft 7 in this way, the hooks 8 and the end plate 6 are prevented from slipping back in the radial direction of the rotor 3 in such a way that the longitudinal regions L2 are no longer arranged behind the wall regions W. This means that by means of the mounted shaft 7, the end plate 6 and thus the hooks 8 are locked in the radial direction of the rotor 3 relative to the laminated core 5.

[0045] The hooks 8 are formed, for example, from a plastic material and manufactured, for example, by plastic injection molding, in particular such that, for example, the hooks 8 are injection-molded onto a base body of the end plate 6. The base body of the end plate 6 is formed, for example, from a metallic material, in particular from steel or aluminum. The hooks 8 are preferably formed integrally with one another, i.e., from a single piece.

[0046] Furthermore, it would be conceivable for the hooks 8 to be formed integrally with the base body, so that, for example, the hooks 8 and the base body are formed from a single piece. In this case, the hooks 8 are produced, for example, by milling, and / or the hooks 8 and the base body are produced by casting. For example, the hooks 8 and thus, for example, the base body are formed from a metallic material, in particular aluminum. It is also conceivable for the respective hook 8 to be formed separately from the base body and partially arranged in the base body, so that, for example, the respective hook is formed as an insert, also referred to as an insert. In this case, for example, the respective hook 8 is formed from a metallic material, in particular aluminum, so that, for example, the respective hook 8 can be formed as a metallic insert, in particular as an aluminum insert.

[0047] The sheet metal segments are, for example, individual, punched sheet metal segments and are thus manufactured by punching. In particular, the sheet metal segments are or will be manufactured using a punching tool, for example. By means of at least one or more sliders in the punching tool, different shapes or geometric elements of the sheet metal segments can be produced, for example. If the sheet metal stack 5 is constructed from the sheet metal segments after the sheet metal segments have been manufactured, the sheet metal segments form the receptacles 10, so that the receptacles 10 can be manufactured quickly and cost-effectively. For example, the sheet metal segments are glued to one another, in particular over their entire surface, using a baking varnish and are thereby connected to one another. The receptacles 10 can be implemented particularly advantageously in the sheet metal stack 5 because the sheet metal segments are very firmly connected to one another due to their connection by means of the baking varnish.

[0048] The method illustrated in Fig. 4 is also particularly clear from Fig. 5. For example, in the first step S1, the end plate 6 and with it the hooks 8 are moved axially offset from the laminated core 5 and in the axial direction relative to the laminated core 5 such that the hooks 8 are inserted into the receptacles 10. After the first step S1 and before the second step S2, the end plate 6 is still arranged axially offset from the laminated core 5. In the second step S2, the end plate 6 and thus the hooks 8 are displaced in the radial direction relative to the laminated core 5 such that the second longitudinal regions L2 are pushed behind the wall regions W. The hooks 8 subsequently engage behind the wall regions W, whereby the end plate is captively fixed, in particular pre-fixed, to the laminated core 5, particularly without the aid of the winding.The shaft 7 and, in particular, the winding can then be mounted, wherein the winding is mounted, for example, such that the winding is wound at least around the partial area of ​​the laminated core 5 and preferably also at least around the partial area of ​​the end plate 6. This, for example, firmly attaches the end plate 6 to the laminated core 5. List of reference symbols.

[0049] 1 electric machine

[0050] 2 Stator

[0051] 3 Rotor

[0052] 4 machine rotation axis

[0053] 5 sheet package

[0054] 6 End plate

[0055] 7 Wave

[0056] 8 hooks

[0057] 9 Double arrow

[0058] 10 recordings

[0059] 11 Double arrow

[0060] 12 Arrow

[0061] 13 Arrow

[0062] AS1 axial end face

[0063] G Basic area

[0064] H1 first hook

[0065] H2 second hook

[0066] L1 first length range

[0067] L2 second length range

[0068] S1 first step

[0069] S2 second step

[0070] S3 third step

[0071] W wall area

Claims

Patent claims 1. An electrical machine (1) for a motor vehicle, comprising a laminated core (5) as the first component, and at least one end plate (6) as the second component, said end plate adjoining an axial end face (AS1) of the laminated core (5) in the axial direction (9) of the electrical machine (1), being arranged on the axial end face (AS1) and being formed separately from the laminated core (5), characterized in that at least two hooks (8) are provided on one of the components, projecting from a base region (G) of one component in the axial direction (9) of the electrical machine (1), said hooks engaging in corresponding receptacles (10) provided on the other component and engaging behind wall regions (W) of the other component delimiting the receptacles (10) in the axial direction (9) of the electrical machine (1), whereby the end plate (6) is fastened to the laminated core (5).

2. Electrical machine (1) according to claim 1, characterized in that one component is the end plate (6) and the other component is the laminated core (5).

3. Electrical machine (1) according to claim 1 or 2, characterized in that the respective hook (8) has a first longitudinal region (L1) extending in the axial direction (9) of the electrical machine (1) away from the base region (G) and a second longitudinal region (L2) adjoining the first longitudinal region (L1), which: - runs in the radial direction (9) of the electrical machine (1) or obliquely to the radial direction (11) of the electrical machine (1); - runs obliquely or perpendicularly to the first length range (L1); and - engages behind the respective wall area (W) in the axial direction (9) of the electrical machine (1).

4. Electrical machine (1) according to claim 3, characterized in that: - a first of the hooks (8) is designed such that the second length region (L2) of the first hook (H1) extends outwardly in the radial direction (11) of the electrical machine (1) away from the first length region (L1) of the first hook (H1); and - a second of the hooks (8) is designed such that the second length region (L2) of the second hook (H2) extends inwards in the radial direction (11) of the electrical machine (1) away from the first length region (L1) of the second hook (H2).

5. Electrical machine (1) according to claim 3 or 4, characterized in that the respective second length region (L2) of the respective hook (8) forms a respective free end of the respective hook (8) which ends at its respective free end.

6. Electrical machine (1) according to one of the preceding claims, characterized in that the respective hook (8) is formed from a plastic.

7. Electrical machine (1) according to claim 6, characterized in that the respective hook (8) is produced by plastic injection molding.

8. Motor vehicle, with at least one electrical machine (1) according to one of the preceding claims.

9. A method for producing an electrical machine (1) for a motor vehicle, in which: - a laminated core (5) is provided as the first component; - at least one end plate (6) formed separately from the laminated core (5) is provided as a second component; and - the end plate (6) is arranged on an axial end face (AS1) of the laminated core (5) in such a way that the end plate (6) extends in the axial direction (9) of the electrical machine (1) to the axial end face (AS1) of the laminated core (5), characterized in that at least two hooks (8) are provided on one of the components, which hooks protrude from a base region (G) of one component in the axial direction (9) of the electrical machine (1), which hooks are brought into engagement with corresponding receptacles (10) provided on the other component and thereby engage behind wall regions (W) of the other component delimiting the receptacles (10) in the axial direction (9) of the electrical machine (1), whereby the end plate (6) is fastened to the laminated core (5).

10. Rotor (3) for an electric machine (1) of a motor vehicle, with a laminated core (5) as the first component, and with at least one end plate (6) as the second component, which adjoins an axial end face (AS1) of the laminated core (5) in the axial direction (9) of the rotor (3), is arranged on the axial end face (AS1) and is formed separately from the laminated core (5), characterized in that at least two hooks (8) are provided on one of the components, which hooks protrude from a base region (G) of one component in the axial direction (9) of the rotor (3), engage in corresponding receptacles (10) provided on the other component and engage behind wall regions (W) of the other component delimiting the receptacles (10) in the axial direction (9) of the rotor (3), whereby the end plate (6) is fastened to the laminated core (5).

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