Motor

Abstract

The invention relates to an electric machine (10) having at least one first machine part (12, 14), the electric machine comprising at least one 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. The rotor (28) is located between the first stator part (24) and the second stator part (26), and wherein the first cooling disc (20) and the further cooling disc (18) are fixed relative to each other by means of a plurality of holding elements (36). The invention further relates to the use of the electric machine (10) in an electronic axle module of an electrically driven vehicle.

Description

Technical Field

[0001] The invention relates to an electric machine having at least one electric machine component, wherein the electric machine component comprises at least one first cooling plate and a further cooling plate, at which a first stator component and a second stator component are respectively accommodated. In addition, the invention relates to a use of the electric machine in an electronic axle module of an electric drive vehicle. Background Art

[0002] DE 10 2018 106 947 A1 discloses an electric motor, which is connected in a simplified manner to a carrier unit provided for holding or fixing a stator. For this purpose, it is provided that a raised section with a radially recessed clamp-shaped section is constructed at the peripheral surface of the stator, wherein the raised section and the peripheral surface of the carrier unit cooperate to form a force-locking connection. Thus, a clamp-shaped and elastic structure that simplifies fastening and holding is formed, which reduces the vibration and mechanical influence generated by the electric motor in the fastened state. In other embodiments, the force-locking connection can be designed as a pure clamping connection or as a rotating clamping connection. Therefore, the additional structural components or material consumption should be minimized in particular, and the prerequisites for automated and quality-guaranteed manufacturing are additionally provided.

[0003] DE 10 2016 209 298 B4 discloses a vehicle component having a structure-borne sound and / or vibration damping region, which has a modified natural vibration characteristic and is less susceptible to influence, in particular compared to conventional components. For this purpose, a chemical and / or physical treatment is performed in the relevant region of the metallic vehicle component. In the disclosed embodiment of the invention, this may be a housing for an electric motor. Summary of the invention

[0004] According to the present invention, an electric machine is provided, which has at least one electric machine component, wherein the electric machine component comprises at least one first cooling plate and a further cooling plate, wherein a first stator component and a second stator component are respectively received at the first cooling plate and the further cooling plate. The first stator component and the second stator component are provided with a rotor, wherein the first cooling plate and the further cooling plate are fixed relative to each other by means of a plurality of retaining elements.

[0005] The solution proposed according to the invention makes it possible to replace a jacket-shaped housing for the electric machine by using a plurality of retaining elements, which on the one hand contributes to weight savings and on the other hand significantly reduces production costs. The number of retaining elements extending between the cooling plates can vary, wherein the retaining elements can also be formed from a material such as plastic or a mixed material including plastic and metal components.

[0006] In an advantageous embodiment of the electrical machine according to the invention, the first cooling plate, the further cooling plate, the second cooling plate as well as the stator part assigned thereto and the rotor part arranged therebetween are designed in the form of a disk.

[0007] In an advantageous development of the electric machine proposed according to the invention, the electric machine is designed as an axial flow machine, as a transverse flow machine or as a mixed radial-axial flow machine (radiax).

[0008] In the electric machine proposed according to the invention, the further cooling plate is preferably designed as a double cooling plate. This results in the possibility of developing the electric machine in a modular manner so that it comprises a first motor part and a second motor part which are connected via a centrally arranged further cooling plate designed as a double cooling plate.

[0009] In an advantageous development of the electric machine proposed according to the invention, the electric machine has a first motor part and a second motor part, which are connected to one another via the above-mentioned double cooling plate.

[0010] In an advantageous development of the electric machine proposed according to the invention, the respective rotor is arranged in at least one machine part with respect to a stator part assigned thereto, which is preferably designed in the form of a disk, forming an air gap.

[0011] In the electric machine according to the invention, a plurality of retaining elements are made of a weight-saving plastic material, of a metal material or of a hybrid material, i.e. a combination of plastic material and metal material. This arrangement results in a considerable weight saving in the embodiment of the electric machine according to the invention without in any way adversely affecting its functional reliability and functional stability.

[0012] In the motor proposed according to the invention, the holding element is advantageously implemented, for example, with a round, semi-circular, annular, square, hollow profile or V-shaped cross section. Not only hollow profiles but also solid materials with cylindrical or square cross sections can be used.

[0013] In an advantageous development of the electric machine proposed according to the invention, the retaining elements which secure the cooling plates relative to one another are designed in a V-shape, W-shape, N-shape or in an I-shape. Such a geometrical design of the retaining elements ensures a sufficient number of connection points on the cooling plates which connect the retaining elements to one another and which extend between them.

[0014] In the electric machine according to the invention, the retaining element between the cooling disk and the further cooling disk is provided with a spacer element, so that manufacturing-related tolerances with respect to the spacing between components of the electric machine, namely the stator component and the rotor and the retention of the air gap can be compensated, and the axial air gap between the end face of the stator component and the disk-shaped rotor can be set.

[0015] In an advantageous development of the electric machine proposed according to the invention, the first machine part and the second machine part are provided with half-shell-shaped shielding halves, thereby encapsulating the electric machine to the outside and achieving better noise reduction and improved electromagnetic compatibility.

[0016] In the electric machine proposed according to the invention, a position sensor can be accommodated on the outside of the first cooling plate or the second cooling plate; in addition, the power electronics can be arranged either on the outside of the electric machine or on the underside of the electric machine. The arrangement of the position sensor and the power electronics depends on the respectively available installation space when the electric machine is installed in the electrically driven vehicle.

[0017] The electric machine proposed according to the invention can be connected to the vehicle chassis in an advantageous manner by means of a multi-point bearing using a bearing with a damping element. In order to be able to take into account different installation requirements, a rod-shaped extension can be constructed between the bearing of the multi-point bearing and the damping element.

[0018] Regardless of whether the electric machine proposed according to the invention is designed as one motor component or as two adjacent motor components, a single-stage or multi-stage transmission unit can be provided on the outside, in particular on the outside of the first cooling plate or the second cooling plate. It is also possible to use an electric machine which generates very high torques in a direct manner without an intermediate transmission.

[0019] The invention further relates to the use of the electric machine in an electronic axle module of an electrically driven vehicle.

[0020] Advantages of the present invention:

[0021] By means of the design proposed according to the invention of an electric motor having at least one motor component, preferably two motor components arranged adjacent to one another, the material input for machining the motor housing can be significantly reduced. Furthermore, by means of the solution proposed according to the invention, a considerable amount of costs and a considerable amount of weight can be saved. Furthermore, simpler manufacturing techniques can be used for manufacturing the electric motor proposed according to the invention, wherein the functional requirements usually imposed on the motor housing can nevertheless be maintained. By means of the solution proposed according to the invention, it is possible to ensure that the spacing between the individual motor components of the electric motor is precisely maintained by using retaining elements. Furthermore, the spacing can be adjusted significantly more easily than with solutions that provide a motor housing for the electric motor. By means of the solution proposed according to the invention, a considerable improvement in the noise-vibration-harshness characteristics of the electric motor can also be achieved.

[0022] The retaining element proposed according to the invention can be manufactured from a plastic material or any combination of inexpensive materials, so that significant cost advantages can be achieved in the manufacture of the motor proposed according to the invention. In addition, the weight of the housing is significantly reduced. In addition, significantly simpler and more cost-effective manufacturing technology can be used in the manufacture of the motor proposed according to the invention. A very simple and extremely effective sealing can be achieved based on the shielding element and the half-shell-shaped covering element, so that the internal components of the motor are protected from water and dust. In addition, the components of the motor proposed according to the invention are encapsulated to the outside by two half-shell-shaped shielding elements, thereby achieving less noise radiation.

[0023] The power electronics associated with the electric machine according to the invention can be arranged at different installation locations according to the requirements of the vehicle manufacturer. The power electronics can be directly connected to one of the cooling plates of one of the motor components of the electric machine according to the invention, so that connecting cables can be saved. The materials used for the shell-shaped cover and the shielding element can be selected so that electric shocks can be avoided during the assembly of the electric machine according to the invention or during its subsequent operation.

[0024] Depending on the installation requirements, the above-mentioned power electronics can be assigned to one of the cooling disks of the electric machine proposed according to the invention. In addition, the power electronics can also be arranged above and below the electric machine or integrated into one of the cooling disks. By arranging the single-stage or multi-stage transmission unit on one of the cooling disks of the first motor part or the second motor part, a compactly installed electronic shaft module can be realized, which can be adapted to the installation requirements of the corresponding automobile manufacturer, which is related to the available installation space.

[0025] The solution proposed according to the invention allows simple adaptation to different power levels and also simple scaling. It should also be emphasized that the solution proposed according to the invention allows a modular design and that a great simplification can be achieved by omitting the transmission. A smaller and more compact design can also be achieved, for example, by a common cooling plate for the power electronics and the electric motor. In addition, the solution proposed according to the invention is implemented in a substantially cable-free manner, which provides additional simplifications, especially when carrying out maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Embodiments of the present invention will be explained in detail based on the drawings and the following description.

[0027] in:

[0028] Figure 1 , Figure 1.1 A front view and a side view of a motor according to the present invention having a first motor component and a second motor component are shown;

[0029] Figure 2 Shown in accordance with Figure 1 An exploded view of the motor according to the present invention;

[0030] Figure 3 , Figure 3.1 A front view and a side view of an electric machine according to the present invention are shown, wherein the electric machine has a position sensor located in a power electronic device;

[0031] Figure 4 , Figure 4.1 The electric machine according to the invention is shown in a front view and a side view, the electric machine having a position sensor arranged laterally on the outside and a power electronics arranged below the second machine part;

[0032] Figure 5 to Figure 8.1 Different geometries, shapes and cross-sections of retaining elements extending between the cooling plates of an electric machine according to the invention are shown;

[0033] Fig. 9 , Figure 9.1 A schematic diagram showing a three-point support structure of a motor in a vehicle chassis according to the present invention is shown;

[0034] Fig.10 , Figure 10.1 Another design scheme of the three-point support structure of the motor in the vehicle chassis according to the present invention is shown, in which an extension element is used between the damper and the support; and

[0035] Fig.11 , Figure 11.1The electric machine proposed according to the present invention is shown in a front view and a side view, and the electric machine has a single-stage or multi-stage transmission mechanism unit arranged laterally on the electric machine. DETAILED DESCRIPTION

[0036] In the following description of embodiments of the present invention, identical or similar elements are denoted by the same reference numerals, wherein a repeated description of these elements is omitted in individual cases. The figures merely schematically illustrate the subject matter of the present invention.

[0037] Figure 1 The electric machine 10 according to the present invention is shown, and the electric machine has a first electric machine component 12 and a second electric machine component 14; Figure 1.1 Shown in accordance with Figure 1 10 is a side view of the motor 10.

[0038] By following Figure 1 It can be seen from the front view of the motor 10 proposed according to the present invention that the motor includes a first motor component 12 and a second motor component 14 arranged coaxially with the first motor component. Each of the motor components 12 and 14 is laterally equipped with a shaft shoulder of the shaft 16.

[0039] The electric machine 10 proposed according to the invention with its first motor part 12 is distinguished by the fact that, instead of a machine housing in the form of a jacket made of solid material, a Figure 1 A plurality of retaining elements 36 are arranged between the first cooling plate 20 and the centrally arranged further cooling plate 18. Figure 1 As shown, the holding element 36 extends between the first cooling plate 20 and the centrally arranged further cooling plate 18. The first stator part 24 is arranged on the inner side of the first cooling plate 20, while the second stator part 26 is arranged on the inner side of the further cooling plate 18 facing the first cooling plate 20.

[0040] There is a rotor 28 between them, which is positioned between the end faces of the stator parts 24 and 26 lying opposite one another, forming an air gap 40 .

[0041] The exact dimensioning of the air gap 40 between the individual end faces of the stator parts 24 and 26 and the rotor 28 can be set or optionally re-set by means of spacer elements 38 which are arranged at the connection points of the retaining element 36 to the first cooling disk 20 and to the further cooling disk 18 .

[0042] According to the embodiment of the further cooling plate 18 as a double cooling plate, the further cooling plate serves as a connection of the second motor part 14 to the first motor part 12. The second motor part 14 is designed similarly to the first motor part 12. Figure 1In the illustration of , the retaining element 36 is omitted for the second motor part 14. The first motor part 12 and the second motor part 14 are designed, for example, in this variant embodiment in a cylindrical shape. It can be different from this, for example to integrate cooling channels or to achieve structural space and position for connecting components placed, for example, in the axial direction. The above-mentioned rotor 28, 34 is installed between the first cooling disk 20, the further cooling disk 18 and the second cooling disk 22 of the second motor part 14. All components have a substantially disk-shaped configuration, so that the entire electric machine 10 proposed according to the invention is designed according to Figure 1 The front view in FIG. 1 has a cylindrical appearance, for example. Figure 1 As can be seen from the diagram, the rotor 34 is arranged between the first stator part 30 and the second stator part 32, which are designed in a disk shape, forming an air gap 40. The air gap 40 is set by the above-mentioned retaining element 36 at the end of the retaining element 36 and, if necessary, adjusted.

[0043] By following Figure 1.1 From the side view, we can see that according to Figure 1 The structural unit is surrounded by a first shielding half 42 and a second shielding half 44, so that on the one hand, the internal components of the motor 10 according to the present invention are protected, and on the other hand, noise radiation to the outside can be suppressed. Half-shell covers 46 and 48 are assembled on the first shielding half 42 and the second shielding half 44, and these half-shell covers shield the entire motor 10 according to the present invention to the outside and make it accessible after disassembly.

[0044] By following Figure 2 The exploded view further illustrates the various components of the motor 10 provided according to the present invention. Figure 2 It is shown that the first cover 46 and the second cover 48 are substantially half-shell-shaped and can be screwed to each other along the bend. The first cover 46 and the second cover 48 respectively surround the first shield half 42 and the second shield half 44 which are designed to be complementary to each other and shield the internal components of the electric machine 10, including the first motor component 12 and the second motor component 14, from the outside. This ensures dust and water protection for the components of the electric machine 10 proposed according to the invention; in addition, noise radiation is reduced and the noise-vibration-harshness characteristics are significantly improved.

[0045] according to Figure 2 According to the perspective view in FIG. 1 , the motor 10 proposed in the present invention comprises the above-mentioned first motor component 12 and the above-mentioned second motor component 14. The two motor components 12, 14 are connected to each other via an additional cooling plate 18 serving as a double cooling plate. Figure 2, the first cooling plate 20 and the second cooling plate 22 are arranged outside. The corresponding disk-shaped rotors 28 and 34 are arranged between the stator parts 24 and 26 with respect to the first motor part 12; the rotor 34 of the second motor part 14 is located between the stator parts 30, 32, wherein the two rotors 28 and 34 are arranged relative to the stator parts 24, 26 or 30, 32 while forming an air gap 40.

[0046] Figure 3 and Figure 3.1 Shown in accordance with Figure 1 and Figure 1.1 The front view and the side view of the motor 10 according to the present invention are shown in FIG. Figure 3 As can be seen from the illustration, a power electronics 50 is mounted on the outer side 54 of the first cooling plate 20. The power electronics 50 surround a position sensor 52 which is also arranged on the outer side 54 of the first cooling plate 20 of the first motor component 12. Figure 3 As an alternative to the exemplary embodiment shown in , the power electronics 50 together with the position sensor 52 can also be accommodated on the outer side of the second cooling disk 22 of the second motor part 14 .

[0047] Similar to Figure 1 and Figure 1.1 , a first cooling plate 20 and a further cooling plate 18 used as a double cooling plate are connected to one another via a plurality of retaining elements 36. The exact spacing between the first cooling plate 20 and the further cooling plate 18 is predetermined by the spacing elements 38 arranged at the connection points of the retaining elements 36 and can be adapted if necessary by replacing them.

[0048] Figure 3 A side view of the motor 10 is shown, Figure 3 It is known that the power electronic device 50 has a substantially circular appearance in this variant embodiment and surrounds the position sensor 52. The power electronic device 50 can also have a rectangular structure or another geometric shape. Figure 1.1 , the electric machine 10 is surrounded by shell-shaped covers 46 , 48 , which in turn surround the first and second shield halves 42 , 44 .

[0049] Figure 4 and Figure 4.1 According to Figure 1 and Figure 1.1 or Figure 3 and Figure 3.1 The difference of the motor 10 proposed according to the present invention is that in accordance with Figure 4 and Figure 4.1In a variant embodiment of the electric machine 10 according to the invention, the power electronics 50 is arranged here, for example, at the bottom 55 of the electric machine 10, here below the second machine part 14. Figure 3 and Figure 3.1 , the position sensor 52 is located at the outer side 54 of the first cooling plate 20 . Figure 4.1 The position of the power electronics 50 is shown, which are mounted here on the underside 55 of the electric machine 10; in addition, a 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 arranged at different installation positions.

[0050] Depend on Figure 5 to Figure 8.1 Various variant embodiments of the retaining element 36 are known, both with regard to its geometry and also with regard to its cross-sectional configuration.

[0051] Figure 5 A V-shaped embodiment 66 of a retaining element 36 is shown, wherein in this variant of the retaining element 36, its cross section is a circular cross section 56 of a solid material. In this case, the solid material can be a plastic material, a metal material or a hybrid material, that is to say a combination of plastic and metal materials, which is suitable for Figure 5 to Figure 8.1 This allows for a significant weight advantage and also a very positive influence on the noise-vibration-harshness properties of the electric machine 10 according to the invention, without the mechanical stability of the motor components 12 , 14 of the electric machine 10 according to the invention being adversely affected.

[0052] Figure 6 A variant embodiment of the retaining element 36 is shown which is W-shaped 68 , wherein in this variant embodiment the retaining element 36 has an annular cross section 58 .

[0053] Figure 7 A variant embodiment of the retaining element 36 which is also W-shaped 68 is shown, wherein according to Figure 7 A square cross section 60 of solid material can be realized, or as in Figure 7.2 As shown in FIG. 3 , a hollow profile 62 can be used. In these variant embodiments of the retaining element 36 , the retaining element can also be made either completely of a metal material, of a plastic material, or of a mixed material consisting of a plastic and a metal material.

[0054] from Figure 8 A variant embodiment of the retaining element 36 in the form of an N 70 can be seen, wherein the retaining element is arranged in accordance with Figure 8.1It is possible to have a V-shaped cross section 64. Instead of a V-shaped cross section 64, an I-shaped cross section can also be selected. Figures 5 to 8 All the retaining elements 36 shown in FIG. 1 can have different cross-sectional variations, such as in FIG. Figure 5.1 , Figure 6.1 , Figure 7.1 , Figure 7.2 and Figure 8.1 As shown in FIG. The shape of the cross section can be arbitrary. There are different base materials that can be used as the retaining element 36. Figure 5.1 , Figure 6.1 , Figure 7.1 , Figure 7.2 and Figure 8.1 The cross-sectional geometries shown in are listed by way of example.

[0055] from Fig. 9 and Figure 9.1 It can be seen that the electric motor 10 proposed according to the present invention, which includes a first motor component 12 and a second motor component 14, is connected to a vehicle chassis 80, for example, of an electric vehicle by means of a three-point bearing structure. As an alternative to a purely electric vehicle, the vehicle can also be a hybrid vehicle (HEV, PHEV); in addition, the electric motor 10 proposed according to the present invention can be used as a booster module or a booster shaft in a vehicle. The three-point bearing structure of the electric motor 10 proposed according to the present invention is realized by arranging damping elements 82 respectively between the connection points on the vehicle chassis 80. Between the components of the electric motor 10, in the present case between the first cooling plate 20, the second cooling plate 22 and the other cooling plate 18 configured as a double cooling plate, a bearing 84 is arranged in the form of a three-point bearing structure on the vehicle chassis 80. Therefore, the electric motor 10 proposed according to the present invention, which is configured in a cylindrical manner, including the first motor component 12 and the second motor component 14, is supported at three points in the vehicle chassis 80. The transmission of noise or vibrations occurring during operation to the vehicle chassis 80 is prevented to the greatest extent by the damping element 82.

[0056] Figure 9.1 Shown in accordance with Fig. 9 A front view of the motor 10 according to the present invention. Figure 9.1 In the embodiment, the bearing points in the vehicle chassis 80 can be arranged opposite each other, for example, offset by 180° relative to each other. However, any angle other than 180° can also be selected. Figure 9.1 The variant embodiment of FIG. 1 also shows that the electric machine 10 according to the present invention comprises a first cover 46 and a second cover 48 configured in the form of a half shell, which for their part surround the first shield half 42 and the second shield half 44. Fig. 9 and Figure 9.1The other components of the motor 10 according to the present invention are suitable for Figure 1 , Figure 1.1 , Figure 3 and Figure 3.1 What has been described.

[0057] from Fig.10 and Figure 10.1 A variant embodiment of the three-point support structure of the electric machine 10 proposed according to the invention in the vehicle chassis 80 can be seen. Depending on the installation position for the electronic shaft module with the electric machine 10 proposed according to the invention and the available structural space, it may be necessary to arrange a rod-shaped extension 86 between the chassis 80, the damping element 82 and the connection point at the support 84. Fig.10 The extension 86 shown in FIG. 1 is assigned to the support 84 at the first cooling plate 20. Of course, it is also possible to provide a rod-shaped extension 86 at both supports 84, that is, at both supports for the first cooling plate 20 and for the second cooling plate 22, at the connection point with respect to the vehicle chassis 80. Figure 10.1 This can also be seen in the 3-point bearing, wherein at the lower support point of the three-point bearing, a rod-shaped extension 86 extends between the corresponding damping element 82 and the support 84 at the lower side 55 of the electric machine 10 according to the invention. The rod-shaped or tubular arrangement of the extension 86 depends on the installation situation or the installation space for the electric machine 10 according to the invention in the chassis 80 of the electric drive vehicle. In addition to electric drive vehicles, the electric machine 10 according to the invention can also be used in hybrid vehicles (HEV, PHEV) or as a booster module or booster electric shaft.

[0058] About following Fig.10 and Figure 10.1 The components of the motor 10 are applicable to the above Figure 1 , Figure 1.1 , Figure 3 , Figure 3.1 , Fig. 9 , Figure 9.1 Content already explained.

[0059] from Fig.11 and Figure 11.1 A variant embodiment of the electric machine 10 according to the invention can be seen, in which a single-stage or multi-stage transmission mechanism unit 90 is arranged on the outer side of one of the cooling plates 20, 22. The transmission mechanism unit is driven by the shaft 16 on the outer side 54 of the first cooling plate 20. Alternatively, there is also the following possibility: according to Fig.11 The single-stage or multi-stage transmission unit 90 is arranged on the outer side 54 of the second cooling plate 22 of the second motor part 14. Figure 11.1 According to Fig.11 1 . A side view of the arrangement of the electric machine 10 according to the invention. Similar to the above-described variant embodiments of the electric machine 10 according to the invention, the electric machine has a first and a second cover 46, 48 configured in a shell-like manner, which for their part surround first and second shield halves 42, 44, which are also designed in a shell-like manner.

[0060] The electrical machine 10 proposed according to the invention can be designed, for example, as an axial flow machine. Instead of an axial flow machine, a hybrid radial-axial flow machine is also a possible variant, as is a transverse flow machine.

[0061] The above basis Figure 1 to Figure 11.1 All the variant embodiments of the electric machine 10 according to the invention described, either with only the first motor part 12 or with two motor parts 12, 14, have in common that a significant material and weight saving can be achieved due to the use of the retaining element 36. In addition, a significantly more advantageous manufacturing technology can be used. By using a plastic material to construct the retaining element 36, the electric machine 10 according to the invention can achieve a significant weight advantage and a significant improvement in the noise-vibration-harshness characteristics when installed in the vehicle chassis 80. The three-point support structure of the electric machine 10 according to the invention, which is essentially cylindrical, ensures that the noise radiation is significantly minimized. The internal components of the first motor part 12 and the second motor part 14 can be protected from dust and water by means of covers 46, 48 and by shielding halves 42, 44; after disassembly of the relevant components 42, 44 or 46, 48, the internal structure of the electric machine 10 can be freely accessible. A distance adjustment, for example for resetting the air gap 40 , can be carried out in a very simple manner by replacing the corresponding spacing element 38 at the connection point of the holding element 36 relative to the cooling plate 18 , 20 , 22 .

[0062] The invention is not limited to the embodiments described here and the aspects derived therein, but rather a number of variants within the capabilities of a person skilled in the art can be implemented within the scope defined by the claims.

Claims

1. An electric machine (10) having at least one first electric machine component (12, 14), wherein: The first motor component comprises at least one first cooling plate (20) and a further cooling plate (18), on which a first stator component and a second stator component (24, 26) are respectively received, characterized in that a rotor (28) is arranged between the first stator component (24) and the second stator component (26), and the first cooling plate (20) and the further cooling plate (18) are fixed relative to each other by means of a plurality of retaining elements (36).

2. The electric machine (10) according to claim 1, characterized in that The first cooling plate (20), the further cooling plate (18) and the further second cooling plate (22), the first and second stator parts (24, 26) and at least one rotor (28, 34) are designed in the form of a disk.

3. The electric machine (10) according to claim 1 and 2, characterized in that The electric machine (10) is designed as a mixed radial-axial flow machine (Radiax) or as a transverse flow machine.

4. The electric machine (10) according to claims 1 to 3, characterized in that The further cooling plate (18) is designed as a double cooling plate.

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

6. The electric machine (10) according to claims 1 to 5, characterized in that A respective rotor (28, 34) is arranged in at least one motor part (12, 14) relative to a respective stator part (24, 26; 30, 32) with the formation of an air gap (40).

7. The electric machine (10) according to claims 1 to 6, characterized in that The plurality of retaining elements (36) are made of plastic material or metal material or a combination of plastic material and metal material.

8. The electric machine (10) according to claims 1 to 7, characterized in that The retaining element (36) is designed with a circular cross section (56) or with a semicircular cross section or with a ring cross section (58) or with a square cross section (60) or with a hollow profile cross section (62) or with a V-shaped cross section (64).

9. The electric machine (10) according to claims 1 to 8, characterized in that The retaining element (36) is designed in a V-shape (66) or in a W-shape (68) or in an N-shape (70) or in an I-shape.

10. The electric machine (10) according to any one of claims 1 to 9, characterized in that The retaining element (36) is provided with a spacer element (38) between the cooling disk (20, 22) and the further cooling disk (18).

11. The electric machine (10) according to any one of claims 1 to 10, characterized in that The first and second motor parts (12, 14) are provided with half-shell-shaped shielding halves (42, 44).

12. The electric machine (10) according to claims 1 to 11, characterized in that A position sensor (52) is received on the outer side (54) of the first or second cooling disk (20, 22), and the power electronics (50) is arranged either on the outer side (54) or tangentially on the circumference of the electric machine (10).

13. The electric machine (10) according to claims 1 to 12, characterized in that The electric machine is received in a vehicle chassis (80) in a multi-point bearing, in particular a three-point bearing, on a bearing (84) having a damping element (82).

14. The electric machine (10) according to claim 13, characterized in that An extension member (86) extends between the support member (84) and the damping element (82).

15. The electric machine (10) according to claims 1 to 14, characterized in that A single-stage or multi-stage transmission unit (90) is associated with the outer side (54) of the electric machine (10), in particular one of the cooling disks (20, 22). 16 . Use of an electric machine ( 10 ) according to claim 1 in an electronic axle module of an electric drive vehicle, a hybrid vehicle (HEV, PHEV) or as a booster axle.

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