Electric machine

Abstract

The invention relates to an electric machine (10) comprising at least one first electric machine part (12, 14), wherein said electric machine comprises at least a first cooling disc (20) and a further cooling disc (18) on which a first stator part (24) and a second stator part (26) are accommodated. A rotor (28) is located between the first stator part (24) and the second stator part (26), the first cooling disc (20) and the further cooling disc (18) being fixed relative to one another by means of a number of retaining elements (36). The invention also relates to the use of the electric machine (10) in an electric drive axle module of an electrically powered vehicle.

Description

[0001] Electric machine

[0002] Technical area

[0003] The invention relates to an electric machine with at least one electric machine part, which comprises at least a first cooling disk and a further cooling disk, each of which houses a first and a second stator part. Furthermore, the invention relates to the use of the electric machine in an electric axle module of an electrically powered vehicle.

[0004] State of the art

[0005] DE 10 2018 106 947 A1 discloses an electric motor that is connected in a simplified manner to a support unit provided for holding or stationary fixing the stator. For this purpose, bow-shaped raised sections with radial recesses are formed on a stator circumferential surface, wherein the raised sections interact with the circumferential surface of a support unit to form a force-locking connection. This creates a bow-shaped and elastic structure that simplifies fastening and holding and reduces vibrations and mechanical influences that occur when the electric motor is mounted. In a further embodiment, the force-locking connection can be designed as a pure clamping connection or as a rotary clamping connection.In particular, the aim is to minimize additional components and material costs and, in addition, to create the conditions for automated and quality-assured production.

[0006] DE 10 2016 209 298 B4 relates to a vehicle part with a structure-borne sound-damped and / or vibration-damped area, which exhibits a modified natural vibration behavior, particularly compared to conventional components, and is less susceptible to vibration. For this purpose, chemical and / or physical processing is performed in the relevant area of ​​the metallic vehicle part. In one embodiment of the disclosed invention, this can be a housing for electric motors.

[0007] Disclosure of the invention

[0008] According to the invention, an electric machine is proposed with at least one electric machine part, which comprises at least a first cooling disk and a further cooling disk, on each of which a first and a second stator part are received. A rotor is assigned to the first stator part and the second stator part, and the first cooling disk and the further cooling disk are fixed to one another by means of a number of retaining elements.

[0009] The solution proposed by the invention allows a shell-shaped housing for the electric machine to be replaced by the use of a number of retaining elements, which contributes to weight savings on the one hand and drastically reduces manufacturing costs on the other. The number of retaining elements extending between the cooling disks can vary, and they can also be made of a material such as plastic or a hybrid material comprising plastic and metallic components.

[0010] In an advantageous embodiment of the electrical machine according to the invention, the first cooling disc, the further cooling disc, a second cooling disc as well as the stator parts associated therewith and the rotor parts arranged between them are designed in the shape of a disc.

[0011] In an advantageous development of the electrical machine proposed according to the invention, it is designed as an axial flux machine, as a transverse flux machine or as a hybrid radial-axial flux machine (radiax).

[0012] In the electric machine proposed according to the invention, the additional cooling disk is preferably designed as a double cooling disk. This makes it possible to expand the electric machine in a modular manner such that it comprises a first electric machine part and a second electric machine part, which are connected by the centrally arranged additional cooling disk, which is designed as a double cooling disk.

[0013] In an advantageous development of the electric machine proposed according to the invention, it has a first electric machine part and a second electric machine part, which are connected to one another via said double cooling disk.

[0014] In an advantageous development of the electric machine proposed according to the invention, the respective rotor is arranged in the at least one electric machine part with respect to the stator parts assigned to it, which are preferably disk-shaped, forming air gaps.

[0015] In the electrical machine proposed according to the invention, the number of holding elements is made of a weight-saving plastic material, a metallic material, or a hybrid material, i.e., a combination of a plastic material and a metallic material. This construction represents a drastic weight reduction in the design of the electrical machine proposed according to the invention, without in any way compromising its functional reliability and stability.

[0016] Advantageously, in the electrical machine proposed according to the invention, the holding elements are designed, for example, with a circular, semicircular, annular, square, hollow profile, or even a V-shaped cross-section. Both hollow profiles and solid material with a cylindrical or square cross-section can be used.

[0017] In an advantageous development of the electrical machine proposed according to the invention, the holding elements which fix the cooling disks to one another are designed in a V-shape, a W-shape, an N-shape or an I-shape. Such a geometric design of the holding elements ensures a sufficient number of connection points on the cooling disks which connect these holding elements to one another and between which the latter extend. In the electrical machine proposed according to the invention, the holding elements between the cooling disks and the further cooling disk are provided with spacer elements. This makes it possible to compensate for production-related tolerances with regard to the spacing and maintenance of the air gaps between the components of the electrical machine, i.e. the stator parts and the rotor, and to adjust the axial air gaps between the end faces of the stator parts and the disk-shaped rotors.

[0018] In an advantageous development of the electric machine proposed according to the invention, the first and second electric machine parts are provided with half-shell-shaped shielding halves. This encapsulates the electric machine from the outside, resulting in better noise insulation and improved electromagnetic compatibility.

[0019] In the electric machine proposed according to the invention, a position sensor can be mounted on an outer side of the first or second cooling disk; furthermore, power electronics can be arranged either on the outer side or on an underside of the electric machine. The arrangement of the position sensor and power electronics depends on the available installation space when the electric machine is installed in an electrically powered vehicle.

[0020] The electric machine proposed according to the invention can advantageously be connected to a vehicle chassis by means of a multi-point mounting arrangement using bearings with damping elements. To accommodate various installation requirements, rod-shaped extensions can be formed between the bearings of the multi-point mounting arrangement and the damping elements.

[0021] The electric machine proposed according to the invention, whether embodied as a single electric machine component or comprising two adjacent electric machine components, can be assigned a single- or multi-stage transmission unit on an outer side, in particular on the outer side of the first or second cooling disk. It is also possible to use an electric machine that generates a very high torque directly, without the need for an intermediate transmission. Furthermore, the invention relates to the use of the electric machine in an electric axle module of an electrically powered vehicle.

[0022] Advantages of the invention

[0023] The design of the electric machine proposed according to the invention with at least one electric machine part, preferably with two electric machine parts arranged adjacent to one another, allows the material used to manufacture the motor housing to be significantly reduced. Furthermore, the solution proposed according to the invention allows a considerable proportion of cost and weight savings to be made. Furthermore, simpler manufacturing technologies can be used to manufacture the electric machine proposed according to the invention, while nevertheless maintaining the general functional requirements placed on a motor housing. The solution proposed according to the invention allows precise spacing between the individual motor components of the electric machine to be ensured through the use of the holding elements.Furthermore, adjusting these distances can be performed much more easily compared to a solution in which a motor housing is provided for the electric machine. The solution proposed by the invention also allows a significant improvement in the noise, vibration, and harshness behavior of the electric machine.

[0024] The retaining elements proposed by the invention can be made of a plastic material or any combination of inexpensive materials, thus achieving a significant cost advantage in the manufacture of the electrical machine proposed by the invention. Furthermore, the weight of the housing is significantly reduced. Furthermore, significantly simpler and more cost-effective manufacturing technologies can be used in the manufacture of the electrical machine proposed by the invention. A very simple and effective seal can be achieved thanks to the shielding elements and the half-shell-shaped cover elements, so that the internal components of the electrical machine are protected against water and dust.In addition, the components of the electrical machine proposed according to the invention are encapsulated to the outside by two half-shell-shaped shielding elements, which allows lower noise radiation to be achieved.

[0025] The power electronics associated with the electric machine proposed according to the invention can be arranged at different installation locations, depending on the vehicle manufacturer's requirements. The power electronics can be connected directly to one of the cooling disks of one of the electric motor components of the electric machine proposed according to the invention, thus eliminating the need for connecting cables. The materials used for the shell-shaped cover and the shielding elements can be selected in such a way that electric shocks can be avoided during assembly and subsequent operation of the electric machine proposed according to the invention.

[0026] Depending on the installation requirements, said power electronics can be assigned to one of the cooling disks of the electric machine proposed according to the invention. Furthermore, the power electronics can also be arranged above or below the electric machine or integrated into one of the cooling disks. By arranging a single- or multi-stage gear unit on one of the cooling disks of a first electric machine part or a second electric machine part, a compact electric axle module can be realized that can be adapted to the installation requirements of the respective automobile manufacturer with regard to the available installation space.

[0027] The solution proposed by the invention allows for easy adaptability and scaling to different power levels. Furthermore, it should be emphasized that the concept proposed by the invention enables a modular design and significant simplification by eliminating the gearbox. A smaller and more compact design is also possible, for example, by using a shared cooling disk for the power electronics and the electric motor. Furthermore, the solution proposed by the invention is essentially cable-free, which represents an additional simplification, particularly during maintenance work. Brief description of the drawings

[0028] Embodiments of the invention are explained in more detail with reference to the drawings and the following description.

[0029] They show:

[0030] Figures 1, 1.1 a front view and a side view of the electrical machine proposed according to the invention with a first electric machine part and a second electric machine part,

[0031] Figure 2 is an exploded view of the electrical machine according to the invention shown in Figure 1,

[0032] Figures 3, 3.1 a front view and a side view of the electrical machine proposed according to the invention with a position sensor in the power electronics,

[0033] Figures 4, 4.1 in front and side view the electric machine proposed according to the invention with a position sensor arranged laterally on the outside and power electronics arranged below the second electric machine part,

[0034] Figures 5-8.1 show various geometries, shapes and cross sections of the holding elements extending between the cooling discs of the electrical machine according to the invention.

[0035] Figures 9, 9.1 a schematic representation of a three-point mounting of the electrical machine proposed according to the invention in a vehicle chassis,

[0036] Figures 10, 10.1 show a further embodiment of a three-point mounting of the electrical machine proposed according to the invention in a vehicle chassis using extension elements between the damper and the bearing, and Figures 11, 11.1 show a front view and a side view of an electrical machine proposed according to the invention with a single-stage or multi-stage gear unit arranged laterally thereon.

[0037] Embodiments of the invention

[0038] In the following description of the embodiments of the invention, identical or similar elements are designated by the same reference numerals, whereby a repeated description of these elements is omitted in individual cases. The figures only schematically illustrate the subject matter of the invention.

[0039] Figure 1 shows an electric machine 10 proposed according to the invention, comprising a first electric machine part 12 and a second electric machine part 14; Figure 1.1 shows a side view of the electric machine 10 according to Figure 1.

[0040] As can be seen from the front view of the electrical machine 10 proposed according to the invention according to Figure 1, it comprises the first electric machine part 12 and the second electric machine part 14 arranged coaxially thereto. Each of the electric machine parts 12, 14 is laterally assigned the shoulder of a shaft 16.

[0041] The electric machine 10 proposed according to the invention with its first electric machine part 12 is characterized in that, instead of a machine housing made of a solid material in the form of a shell according to Figure 1, a number of holding elements 36 are arranged between a first cooling disk 20 and a centrally arranged further cooling disk 18. As Figure 1 shows, the holding elements 36 extend between the first cooling disk 20 and the further, centrally arranged cooling disk 18. A first stator part 24 is arranged on the inside of the first cooling disk 20, while a second stator part 26 is arranged on the inside of the further cooling disk 18 facing the first cooling disk 20.

[0042] Between these is a rotor 28, which is positioned between the end faces of the opposing stator parts 24 and 26, forming air gaps 40. The precise dimensioning of the air gaps 40 between the individual end faces of the stator parts 24 and 26 and the rotor 28 can be adjusted or, if necessary, readjusted using spacer elements 38, which are provided at the connection points of the holding elements 36 to the first cooling disk 20 and to the further cooling disk 18.

[0043] Due to the design of the further cooling disk 18 as a double cooling disk, it serves as the connection point for a second electric machine part 14 to the first electric machine part 12. The second electric machine part 14 is constructed analogously to the first electric machine part 12. In the illustration according to Figure 1, the holding elements 36 have been omitted with regard to the second electric machine part 14. The first electric machine part 12 and the second electric machine part 14 are, for example, cylindrical in this embodiment. Deviations from this are possible, for example to integrate cooling channels or to create installation space and room for, for example, axially placed connecting components. The aforementioned rotors 28, 34 are installed between the first cooling disk 20, the further cooling disk 18 and a second cooling disk 22 of the second electric machine part 14.All components have a substantially disc-shaped configuration, so that the entire electric machine 10 proposed according to the invention has, for example, a cylindrical appearance according to the front view in Figure 1. The illustration in Figure 1 further shows that the rotor 34 is arranged between the first stator part 30 and the second stator part 32, which are designed in a disc shape, forming air gaps 40. The air gaps 40 are set by the aforementioned holding elements 36 at the ends of the holding elements 36 and, if necessary, adjusted.

[0044] The side view according to Figure 1.1 shows that the structural unit according to Figure 1 is enclosed by a first shielding half 42 and a second shielding half 44, so that on the one hand the internal components of the electrical machine 10 proposed according to the invention are protected and on the other hand noise radiation to the outside can be dampened. Half-shell-shaped covers 46, 48 are mounted over the first shielding half 42 and the second shielding half 44, which shield the ensemble of the electrical machine 10 proposed according to the invention from the outside and make it accessible after disassembly. The individual components of the electrical machine 10 proposed according to the invention can be seen in more detail in the exploded view according to Figure 2. Figure 2 shows that the first cover 46 and the second cover 48 are essentially half-shell-shaped and can be screwed together along a fold.The first cover 46 and the second cover 48 each enclose the first shielding half 42 and the second shielding half 44, which are complementary in design and shield the internal components of the electric machine 10, comprising the first electric machine part 12 and the second electric machine part 14, from the outside. This ensures dust and water protection for the components of the electric machine 10 proposed according to the invention; furthermore, noise emission is reduced and the noise-vibration-harshness behavior is significantly improved.

[0045] The electric machine 10 proposed according to the invention, as shown in the perspective illustration in Figure 2, comprises said first electric machine part 12 and said second electric machine part 14. The two electric machine parts 12, 14 are connected to one another via the additional cooling disk 18, which functions as a double cooling disk. The first cooling disk 20 and the second cooling disk 22 are arranged externally as shown in Figure 2. The respective disk-shaped rotors 28 and 34 are each arranged between the stator parts 24 and 26, relative to the first electric machine part 12; the rotor 34 of the second electric machine part 14 is located between the stator parts 30, 32, with both rotors 28 and 34 being arranged relative to the stator parts 24, 26 and 30, 32, respectively, forming the air gaps 40.

[0046] Figures 3 and 3.1 show a front view and a side view of the electric machine 10 proposed according to the invention, as shown in Figures 1 and 1.1. The illustration in Figure 3 shows that power electronics 50 are installed on an outer side 54 of the first cooling disk 20. The power electronics 50 encloses a position sensor 52, which is also provided on the outer side 54 of the first cooling disk 20 of the first electric machine part 12. As an alternative to the exemplary embodiment shown in Figure 3, the power electronics 50, including the position sensor 52, could also be accommodated on the outer side of the second cooling disk 22 of the second electric machine part 14. Analogous to the illustration in Figures 1 and 1.1, the first cooling disk 20 and the further cooling disk 18, which functions as a double cooling disk, are connected to one another by a number of holding elements 36.The exact distance between the first cooling disk 20 and the further cooling disk 18 is specified by spacer elements 38 arranged at the connection points of the holding elements 36 and can be adjusted if necessary by replacing them.

[0047] Figure 3, which shows a side view of the electric machine 10, shows that the power electronics 50 in this embodiment has a substantially circular appearance and encloses the position sensor 52. The power electronics 50 could also have a rectangular design or a different geometry. Analogous to the illustration in Figure 1.1, the electric machine 10 is enclosed by the shell-shaped covers 46, 48, which in turn enclose the first and second shielding halves 42, 44.

[0048] Figures 4 and 4.1 differ from the electrical machine 10 proposed according to the invention according to Figures 1 and 1.1 and 3 and 3.1 in that in the embodiment variant of the electrical machine 10 proposed according to the invention according to Figures 4 and 4.1, the power electronics 50 is arranged, for example, here on an underside 55 of the electrical machine 10, here below the second electric machine part 14. The position sensor 52 is located on the outer side 54 of the first cooling disk 20, analogous to the illustration according to Figures 3 and 3.1 of the electrical machine 10 proposed according to the invention. Figure 4.1 shows the position of the power electronics 50, which is mounted here on the underside 55 of the electrical machine 10; furthermore, the position sensor 52 is assigned to the shoulder of the shaft 16 on the first cooling disk 20. The power electronics 50 can also be accommodated at different installation locations.

[0049] Figures 5 to 8.1 show various embodiments of the holding elements 36, both in terms of their geometry and their cross-sectional configuration. Figure 5 shows the V-shaped design of the holding element 36, wherein in this variant of the holding element 36 its cross section is a circular cross section 56 of a solid material. This can be a plastic material, a metallic material, or even a hybrid material, i.e. a combination of plastic and a metallic material, which applies to all embodiments of the holding elements 36 according to Figures 5 to 8.1. This allows significant weight advantages to be achieved, and furthermore, the noise, vibration, and harshness behavior of the electrical machine 10 proposed according to the invention is extremely positively influenced, wherein the mechanical stability of the electric machine parts 12, 14 of the electrical machine 10 proposed according to the invention is not impaired.

[0050] Figure 6 shows a variant of the holding element 36 in W-shape 68, wherein in this variant the holding element 36 has an annular cross-section 58.

[0051] Figure 7 shows a variant of the retaining element 36, also in a W-shape 68, wherein, according to Figure 7, a square cross-section 60 of a solid material can be realized or, as shown in Figure 7.2, a hollow profile 62 can be used. In these variants of the retaining element 36, it can also be made entirely of metallic material, of plastic material, or of a hybrid material made of plastic and metallic material.

[0052] Figure 8 shows a variant of the N-shaped holding element 36, which can have a V-shaped cross-section 64 according to Figure 8.1. Instead of the V-shaped cross-section 64, an I-shaped cross-section could also be selected. All of the holding elements 36 shown in Figures 5 to 8 can have different cross-sectional variations, as shown in Figures 5.1, 6.1, 7.1, 7.2 and 8.1. The design of the cross-section can be arbitrary. There are various base materials that could be used as holding elements 36. The cross-sectional geometries shown in Figures 5.1, 6.1, 7.1, 7.2 and 8.1 are given as examples.

[0053] Figures 9 and 9.1 show that the electric machine 10 proposed according to the invention, comprising the first electric machine part 12 and the second electric machine part 14, is connected to a vehicle chassis 80, for example, of an electrically powered vehicle, by means of a three-point mounting. Instead of a purely electrically powered vehicle, the vehicle could also be a hybrid vehicle (HEV, PHEV); furthermore, the machine 10 proposed according to the invention could be used as a booster module or booster axle in a vehicle. The three-point mounting of the electric machine 10 proposed according to the invention is implemented by arranging damping elements 82 between the connection points on the vehicle chassis 80.The bearings 84 are arranged in the form of a three-point bearing on the vehicle chassis 80 between the components of the electric machine 10—in this case, the first cooling disk 20, the second cooling disk 22, and the additional cooling disk 18, which is designed as a double cooling disk. Thus, the electric machine 10 proposed according to the invention, which is cylindrical in shape here, for example, and comprises the first electric machine part 12 and the second electric machine part 14, is mounted at three points in the vehicle chassis 80. The damping elements 82 largely prevent the transmission of noise or vibrations occurring during operation to the vehicle chassis 80.

[0054] Figure 9.1 shows a front view of the electrical machine 10 proposed according to the invention according to Figure 9. In Figure 9.1, the mounting points in the vehicle chassis 80 can, for example, be offset from one another by 180°. However, any angle other than 180° can also be selected. The embodiment variant according to Figure 9.1 also shows that the electrical machine 10 proposed according to the invention comprises the first cover 46 and the second half-shell-shaped cover 48, which in turn enclose the first shielding half 42 and the second shielding half 44. With regard to the other components of the electrical machine 10 proposed according to the invention according to Figures 9 and 9.1, what has already been described for Figures 1, 1.1, 3 and 3.1 applies.

[0055] Figures 10 and 10.1 show a variant of a three-point mounting of the electric machine 10 proposed according to the invention in a vehicle chassis 80. Depending on the installation position and the available installation space for an electric axle module with an electric machine 10 proposed according to the invention, it may be necessary to arrange a rod-shaped extension 86 between the connection points on the chassis 80, the damping element 82, and a bearing 84. The extension 86 shown in Figure 10 is assigned to the bearing 84 on the first cooling disk 20. It is of course also possible to provide rod-shaped extensions 86 on both bearings 84, i.e., for the first cooling disk 20 and for the second cooling disk 22, at the connection points to the vehicle chassis 80. This is also evident from Figure 10.1, where, at the lower mounting point of a three-point mounting, a rod-shaped extension 86 runs between the corresponding damping element 82 and the bearing 84 on the underside 55 of the electric machine 10 proposed according to the invention. The arrangement of the rod-shaped or tubular extensions 86 depends on the installation conditions or the installation space available for the electric machine 10 proposed according to the invention in the chassis 80 of an electrically powered vehicle. In addition to electrically powered vehicles, the electric machine 10 proposed according to the invention can also be used in hybrid vehicles (HEV, PHEV) or as a booster module or booster e-axle.

[0056] With respect to the components of the electrical machine 10 according to the figures

[0057] 10 and 10.1, what has already been said above regarding Figures 1, 1.1, 3, 3.1, 9, 9.1 applies.

[0058] Figures 11 and 11.1 show a variant of the electrical machine 10 proposed according to the invention, in which a single- or multi-stage gear unit 90 is arranged on an outer side of one of the cooling disks 20, 22. This is driven via the shaft 16 on the outer side 54 of the first cooling disk 20. Alternatively, it is also possible to arrange a single- or multi-stage gear unit 90 on the outer side 54 of the second cooling disk 22 of the second electric machine part 14 according to Figure 11. Figure 11.1 shows a side view of the arrangement according to the electrical machine 10 proposed according to the invention according to Figure

[0059] 11. Analogous to the above embodiments of the electrical machine 10 proposed according to the invention, this machine has the shell-shaped first and second covers 46, 48, which in turn enclose the likewise shell-shaped first and second shielding halves 42, 44. The electrical machine 10 proposed according to the invention can be designed, for example, as an axial flux machine. Instead of axial flux machines, hybrid radial-axial flux machines are also a possible variant, as are transverse flux machines.

[0060] All embodiments of the electrical machine 10 proposed according to the invention described above with reference to Figures 1 to 11.1, either with a first machine part 12 alone or with two electric machine parts 12, 14, have in common that significant material and weight savings can be achieved due to the use of the holding elements 36. Furthermore, significantly more cost-effective manufacturing techniques can be used. By forming the holding elements 36 from a plastic material, a considerable weight advantage as well as a significant improvement in the noise, vibration, and harshness behavior of the electrical machine 10 proposed according to the invention when installed in a vehicle chassis 80 can be achieved. Noise radiation is significantly minimized, which is ensured by the three-point mounting of the essentially cylindrical electrical machine 10 proposed according to the invention.The internal components of the first electric motor part 12 and the second electric motor part 14 can be protected from dust and water ingress by the covers 46, 48 and the shielding halves 42, 44; after disassembly of the respective components 42, 44 and 46, 48, respectively, the interior of the electric machine 10 is freely accessible. Adjusting the distance, for example, to readjust the air gaps 40, can be performed very easily by replacing the corresponding spacer elements 38 at the connection points of the holding elements 36 to the cooling disks 18, 20, 22.

[0061] The invention is not limited to the embodiments described here and the aspects highlighted therein. Rather, numerous modifications are possible within the scope of the claims, which are within the scope of one skilled in the art.

Claims

Claims 1. An electrical machine (10) having at least one first electric machine part (12, 14), said machine part comprising at least one first cooling disk (20) and one further cooling disk (18), on each of which a first and a second stator part (24, 26) are received, characterized in that a rotor (28) is arranged between the first stator part (24) and the second stator part (26), and the first cooling disk (20) and the further cooling disk (18) are fixed to one another by means of a number of holding elements (36).

2. Electrical machine (10) according to claim 1, characterized in that the first cooling disc (20), the further cooling disc (18) and a further second cooling disc (22), the first and the second stator part (24, 26) and at least one rotor (28, 34) are disc-shaped.

3. Electrical machine (10) according to claims 1 and 2, characterized in that the electrical machine (10) is designed as a hybrid radial-axial flux machine (Radiax) or as a transverse flux machine 4. Electrical machine (10) according to claims 1 to 3, characterized in that the further cooling disc (18) is designed as a double cooling disc.

5. Electrical machine (10) according to claims 1 to 4, characterized in that it has a first electric machine part (12) and a second electric machine part (14) which are connected to one another via the further cooling disk (18), designed as a double cooling disk.

6. Electrical machine (10) according to claims 1 to 5, characterized in that in the at least one electric machine part (12, 14) the respective rotor (28, 34) is arranged with respect to the respective stator parts (24, 26; 30, 32) with the formation of air gaps (40). Electrical machine (10) according to claims 1 to 6, characterized in that the number of holding elements (36) is made of a plastic material or of a metallic material or of a combination of plastic material with metallic material. Electrical machine (10) according to claims 1 to 7, characterized in that the holding elements (36) are designed in a circular cross-section (56) or in a semicircular cross-section or in an annular cross-section (58) or in a square cross-section (60) or in a hollow profile cross-section (62) or in a V-shaped cross-section (64). Electrical machine (10) according to claims 1 to 8, characterized in that the holding elements (36) are designed in V-shape (66) or W-shape (68) or N-shape (70) or I-shape. Electrical machine (10) according to one of claims 1 to 9, characterized in that the holding elements (36) between the cooling disks (20, 22) and the further cooling disk (18) are provided with spacer elements (38). Electrical machine (10) according to one of claims 1 to 10, characterized in that the first and second electric machine parts (12, 14) are provided with half-shell-shaped shielding halves (42, 44). Electrical machine (10) according to claims 1 to 11, characterized in that a position sensor (52) is accommodated on an outer side (54) of the first or second cooling disk (20, 22). and power electronics (50) are arranged either on the outer side (54) or tangentially on the circumference of the electrical machine (10). Electrical machine (10) according to claims 1 to 12, characterized in that it is accommodated in a vehicle chassis (80) in a multi-point mounting, in particular a three-point mounting, on bearings (84) with damping elements (82). Electrical machine (10) according to claim 13, characterized in that extensions (86) extend between the bearings (84) and the damping elements (82). Electrical machine (10) according to claims 1 to 14, characterized in that a single-stage or multi-stage gear unit (90) is assigned to an outer side (54) of the electrical machine (10), in particular to one of the cooling disks (20, 22).Use of the electric machine (10) according to one of the preceding claims in an E-axle module of an electrically driven vehicle, a hybrid vehicle (HEV, PHEV) or as a booster axle.

Images