Intermediate housing for an axial flux machine for a drive unit of an at least partially electrically powered motor vehicle, drive unit and motor vehicle

Abstract

The invention relates to an intermediate housing (16) for an axial flux machine (14) for a drive unit (12) of an at least partially electrically powered motor vehicle (10), wherein the intermediate housing (16) is designed to be installed in a drive housing (20) for the drive unit (12), wherein a first frame part (22) of the intermediate housing (16) surrounds a first rotor (24) of the axial flux machine (14), a second frame part (26) of the intermediate housing (16) surrounds a stator (28) of the axial flux machine (14), and a third frame part (30) of the intermediate housing (16) surrounds a second stator (32) of the axial flux machine (14), wherein the intermediate housing (16) has at least one fastening device (34) for fastening the intermediate housing (16) to the drive housing (20). The invention further relates to a drive unit (12) and a motor vehicle (10).

Description

[0001] The invention relates to an intermediate housing for an axial flux machine for a drive unit of an at least partially electrically operated motor vehicle according to the applicable preamble of claim 1. Furthermore, the invention relates to a drive unit and a motor vehicle.

[0002] Axial flux machines are already known in the prior art, which, for example, have two rotors and a stator. These are mounted in a drive housing and can thus serve as a drive unit for a motor vehicle. Within the drive unit, additional gears and other components can then be arranged on the axial flux machine.

[0003] EP3 687 047 A1 describes a method for assembling an axial flux machine, wherein the machine is provided with an integrated clutch assembly housed in the bore of an annular stator of the machine. A first and a second rotor, arranged on either side of the stator, are attached to the clutch basket of the clutch assembly and rotate in unison relative to the stator. A machine housing is provided between the stator and an engagement surface of the clutch basket, which sits on bearings between the clutch basket and the machine housing to create a rigid structure.

[0004] The object of the present invention is to provide an intermediate housing, a drive unit and a motor vehicle by means of which an improved arrangement and thus a reduced assembly effort for a drive unit within the motor vehicle can be realized.

[0005] This object is achieved by an intermediate housing, a drive unit, and a motor vehicle according to the independent patent claims. Advantageous embodiments are specified in the subclaims.

[0006] One aspect of the invention relates to an intermediate housing for an axial flux machine for a drive unit of an at least partially electrically operated motor vehicle, wherein the intermediate housing is designed to be installed in a drive housing for the drive unit.

[0007] It is provided that a first frame part of the intermediate housing surrounds a first rotor of the axial flux machine, and a second frame part of the intermediate housing surrounds a stator of the axial flux machine and a third frame part of the intermediate housing surrounds a second stator of the axial flux machine, wherein the intermediate housing has at least one fastening device for fastening the intermediate housing to the drive housing.

[0008] In particular, the invention thus proposes an axial flux machine wherein an intermediate housing can be formed around the axial flux machine as a prefabricated unit directly after assembly of the axial flux machine, which is thus testable and easier to handle. For this purpose, the stator has a type of intermediate housing area on the outer circumference, which covers only the stator in the axial direction, and on both sides, plates are fastened over the rotors as a closure of the intermediate housing, which plates axially cover the rotors. Such an intermediate housing of the axial flux machine can be easily fastened into a proper housing of a drive unit, in particular a drive housing, and can itself in turn have holders and fastening devices for gears and additional components, which are attached to the intermediate module and then introduced as a further intermediate product into the drive unit with the final outer housing.Therefore, this inner intermediate housing does not need to have the features of a closed housing with connections and sealing requirements, but primarily serves to secure and fix the rotor and stator. In particular, the invention proposes an intermediate housing as a module with a spatial pre-fixation of the axial flux machine, which can then be connected to the drive housing.

[0009] In particular, the intermediate housing is not a bearing shield, as is the case with axial-flow machines, for example, but rather a plate that replicates the rotor's counter-shape and simultaneously covers the entire axial length of the rotor disk, not the stator. Furthermore, these plates can contain the bearings connecting other transmission-relevant components, such as interfaces. In particular, the plates are the first and third frame parts.

[0010] According to an advantageous embodiment, a further fastening device is formed on the intermediate housing, which is designed to fasten a gear of the drive unit.

[0011] It is further advantageous if a shape of the first frame part substantially corresponds to a shape of the first rotor and / or a shape of the third frame part substantially corresponds to a shape of the second rotor.

[0012] Furthermore, the invention also relates to a drive unit for an at least partially electrically operated motor vehicle, with at least one axial flux machine which is surrounded by an intermediate housing according to the previous aspect, and with a drive housing which surrounds at least the axial flux machine and the intermediate housing.

[0013] Furthermore, the invention also relates to a motor vehicle with at least one drive unit according to the preceding aspect.

[0014] Advantageous embodiments of the intermediate housing are to be regarded as advantageous embodiments of the drive unit and the motor vehicle.

[0015] Further advantages, features, and details of the invention will become apparent from the following description of preferred embodiments, as well as from the drawings. The features and feature combinations mentioned above in the description, as well as those mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective combinations specified, but also in other combinations or on their own, without departing from the scope of the invention.

[0016] Showing: Fig. 1 is a schematic side view of an embodiment of a motor vehicle with an embodiment of a drive unit; Fig. 2 a schematic perspective view of a sectional view according to an embodiment of an intermediate housing with an axial flow machine.

[0017] In the figures, identical or functionally identical elements are provided with the same reference numerals.

[0018] Fig. 1 shows a schematic side view of an embodiment of a motor vehicle 10 with an embodiment of a drive unit 12. The motor vehicle 10 is, in particular, at least partially electrically operated or fully electrically operated. The drive unit 12 has at least one axial flux machine 14. An intermediate housing 16 is formed around the axial flux machine 14. Furthermore, the drive unit 12 has at least one transmission 18. For example, the axial flux machine 14 can be formed in a corresponding drive housing 20, surrounded by the intermediate housing 16, as well as the transmission 18.

[0019] Fig. Figure 2 shows a schematic perspective sectional view of an embodiment of an intermediate housing 16 with an axial flow machine 14. In particular, the Fig. 2 the intermediate housing 16 for the axial flow machine 14 for the drive unit 12 of the motor vehicle 10, wherein the intermediate housing 16 is designed to be installed in the drive housing 20 for the drive unit 12.

[0020] In particular, it is provided that the intermediate housing 16 has a first frame part 22, which surrounds a first rotor 24 of the axial flux machine 14. Furthermore, the intermediate housing 16 has a second frame part 26, which surrounds a stator 28 of the axial flux machine 14. Furthermore, a third frame part 30 of the intermediate housing 16 is provided, which surrounds a second rotor 32 of the axial flux machine 14. Furthermore, the intermediate housing 16 has at least one fastening device 34, which is designed to fasten the intermediate housing 16 to the drive housing 20.

[0021] Furthermore, it can be provided that a further fastening device is formed on the intermediate housing 16, which is designed to fasten the gear 18 to the drive unit 12.

[0022] It can also be provided that a shape of the first frame part 22 substantially corresponds to a shape of the first rotor 24 and / or a shape of the third frame part 30 substantially corresponds to a shape of the second rotor 32.

[0023] In particular, the Fig. 2, the intermediate product or intermediate module is an intermediate housing 16, which comprises or surrounds the stator 28 and the rotors 24, 32 with the corresponding bearings therebetween. Otherwise, the intermediate housing 16 is not ready for use, but rather only allows for further installation and testing, for example, in a device. Therefore, in this case, the intermediate housing 16 only needs to meet the mechanical requirements for securing a housing and itself has fastening devices, in particular, for example, the fastening device 34, for other drive-related components. List of reference symbols 10 motor vehicle 12 Drive unit 14 axial flux machine 16 intermediate housings 18 gearboxes 20 drive housings 22 first frame part 24 first rotor 26 second frame part 28 Stator 30 third frame part 32 second rotor 34 Fastening device QUOTES CONTAINED IN THE DESCRIPTION

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

[0000] EP 3 687 047 A1

[0003]

Claims

[1] Intermediate housing (16) for an axial flow machine (14) for a drive unit (12) of an at least partially electrically operated motor vehicle (10), wherein the intermediate housing (16) is designed to be installed in a drive housing (20) for the drive unit (12), characterized by in that a first frame part (22) of the intermediate housing (16) surrounds a first rotor (24) of the axial flux machine (14), a second frame part (26) of the intermediate housing (16) surrounds a stator (28) of the axial flux machine (14) and a third frame part (30) of the intermediate housing (16) surrounds a second stator (32) of the axial flux machine (14), wherein the intermediate housing (16) has at least one fastening device (34) for fastening the intermediate housing (16) to the drive housing (20). [2] Intermediate housing (16) according to claim 1, characterized bythat a further fastening device is formed on the intermediate housing (16), which is designed to fasten a gear (18) of the drive unit (12). [3] Intermediate housing (16) according to claim 1 or 2, characterized by that a shape of the first frame part (22) substantially corresponds to a shape of the first rotor (24) and / or a shape of the third frame part (30) substantially corresponds to a shape of the second rotor (32). [4] Drive unit (12) for an at least partially electrically operated motor vehicle (10), with at least one axial flux machine (14) which is surrounded by an intermediate housing (16) according to one of claims 1 to 3, and with a drive housing (20) which surrounds at least the axial flux machine (14) and the intermediate housing (16). [5] Motor vehicle (10) with at least one drive unit (14) according to claim 4.

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