Housing for machine, machine having housing, and motor vehicle having machine

Abstract

The invention relates to a housing (1) for a machine (2), a machine (2) and a motor vehicle having a machine (2). The housing comprises: a first shaft chamber (5); and outside the first shaft chamber: a hollow first housing interior space (7), the inner wall (9) of which is formed by a first wall portion (10a) of a shaft chamber outer wall (10) of the shaft chamber (2) and forms a lubricant primary tank (4a) of the housing (1); a hollow second housing interior space (8), the inner wall (12) of which is formed by a second wall portion (10b) of the same axial chamber exterior wall (10) and forms a lubricant secondary tank (4b) of the housing (1); a housing transverse strip (13) arranged between the wall parts (10a, 10b), by means of which the lubricant tanks (4a, 4b) are delimited from one another; and a connecting arrangement (14) passing through the housing transverse strip (13), by means of which the lubricant tanks (4a, 4b) are fluidically connected or connectable to each other.

Description

Technical Field

[0001] The present invention relates to a housing for a machine, a machine having such a housing, and a motor vehicle having such a machine. Background Technology

[0002] Machines, especially motors, require cooling, temperature regulation, and lubrication to operate as efficiently as possible. In the automotive sector, motors are used to drive or traction machines. However, designing the most efficient cooling and lubrication systems possible for such driven machines is difficult because the structural space for components used in cooling and / or lubricant circuits is limited by predetermined encapsulation boundary conditions. This often—particularly in the automotive sector—results in only a very small volume of coolant / lubricant tank being housed within the drive motor housing, which is why another coolant / lubricant tank is placed elsewhere, as proposed, for example, in DE 10 2020 007 6356 A1. To integrate the two tanks into the cooling or lubricant circuit, and especially to connect them to each other, it is then necessary to construct corresponding piping and / or hose mechanisms, and, where necessary, valve devices. This is particularly costly and requires additional structural space, further exacerbating the encapsulation problem. Furthermore, efforts must be made to reliably protect the auxiliary tank from vibrations that occur during operation, as these vibrations can generate undesirable noise and / or damage the auxiliary tank during machine or motor vehicle operation. Summary of the Invention

[0003] The object of this invention is to provide a solution with a particularly efficient, i.e., a particularly compact construction, for particularly effective lubrication and / or cooling of machinery.

[0004] This objective is achieved through the technical solutions of the independent patent claims. Further possible designs of the invention are disclosed in the dependent claims, the specification, and the drawings. Features, advantages, and possible designs set forth within the scope of the specification for one of the technical solutions of the independent claims can be considered, at least similarly, across categories and embodiments as corresponding technical solutions of other independent claims, and features, advantages, and possible designs of every possible combination of the technical solutions of the independent claims, where necessary, in conjunction with one or more of the dependent claims.

[0005] According to the present invention, a housing for a machine, a machine having a housing and a lubricant circuit, and a motor vehicle having the machine according to the present invention are provided. In a predetermined installation position, the housing forms part of a machine, particularly an electric motor. For example, an electric motor is a traction machine for a motor vehicle. If the machine, or traction machine, is installed in a motor vehicle in its predetermined installation position, it forms part of the motor vehicle. Accordingly, the motor vehicle is particularly a motor vehicle capable of pure electric drive or hybrid electric drive.

[0006] Specifically, the housing, configured as a casting, has a first shaft chamber through which the first shaft of the machine extends coaxially. The first shaft, for example, is configured as the first rotor shaft of a traction machine, in which a first stator is non-rotatably arranged within the first shaft chamber, and the first rotor shaft extends coaxially through the first stator and thus through the first shaft chamber. Outside the first shaft chamber, the housing has a hollow first housing interior space, the inner wall of which is formed by a first wall portion of the outer wall of the shaft chamber and forms the primary lubricant tank of the housing. Since the first shaft chamber has a cylindrical shape, its outer wall is at least partially cylindrical. The outer wall of the shaft chamber extends into the first housing interior space with its first wall portion, meaning that its inner wall surrounds or is partially formed by the outer wall of the shaft chamber, i.e., by its first wall portion. Furthermore, outside the first shaft chamber, the housing has a hollow second housing interior space, the inner wall of which is formed by another second wall portion of the outer wall of the same shaft chamber and forms the secondary lubricant tank of the housing. The outer wall of the shaft chamber extends into the interior space of the second housing with its second wall portion. This means that the inner wall of the interior space of the second housing surrounds or is partially formed by the same outer wall of the shaft chamber, i.e., by its second wall portion. The housing also has housing transverse slats arranged between the wall portions, and the lubricant tanks are separated from each other by means of the housing transverse slats. The housing transverse slats are in particular stabilizing or structural elements of the housing. In particular, the shaft chamber and the housing transverse slats are integrally formed, and are jointly manufactured by a single molding, such as casting. The housing transverse slats are in particular plate-like and will completely separate the lubricant tanks from each other in the plane between the first and second wall portions of the outer wall of the shaft chamber. However, the housing has a connecting arrangement through the housing transverse slats, by means of which the lubricant tanks are fluidly connected or can be connected to each other. In summary, the primary lubricant tank and the secondary lubricant tank constitute the main lubricant tank of the housing, which can be filled with lubricant, such as oil. The main lubricant tank provides a lubricant circuit for the machine. Accordingly, in a machine, the lubricant tank is either part of the lubricant circuit or fluidly integrated into the lubricant circuit.

[0007] Therefore, the available structural space within the machine housing is optimally utilized to ensure efficient machine lubrication. Spaces within the machine housing that have been previously overlooked or unused are used for lubricant circuits, specifically in the vicinity of the converter or control unit compartment, where the electronic components of the control unit or converter unit are arranged. Particularly below the converter or control unit compartment, structural space in conventional housings remains unused or unfunctional. Due to this invention, such unused / unfunctional structural space is now effectively utilized, as a secondary lubricant tank is formed within this previously unfunctional space. It should be emphasized that the predetermined structural volume of the machine housing—particularly due to packaging boundary conditions—is not increased, yet the amount of lubricant used within the housing is significantly increased. Particularly advantageously, according to the invention, the housing does not have separately manufactured inserts, insert containers, or the like. Instead, the existing structure, contours, and surfaces of the housing, in a conceivably simple manner, are used as elements of the lubricant tank to create it.

[0008] According to possible alternative embodiments, the housing has one or more ventilation openings, wherein the corresponding ventilation opening (which may also be called a pressure balancing opening) passes through the inner wall of the hollow interior space of the second housing. In this regard, the corresponding ventilation opening is located in the lubricant secondary tank. The corresponding ventilation opening is arranged and configured in such a way that it corresponds to the ventilation opening of the transmission housing. Therefore, when such a transmission housing is flanged to the housing, the lubricant secondary tank and the transmission chamber surrounded by the transmission housing are in fluid communication with each other. Pressure balancing between the lubricant secondary tank and the transmission chamber is thus achieved. The lubricant circuit of the correspondingly equipped machine or machine-transmission unit functions particularly effectively. The machine-transmission unit is particularly configured as a drive unit for a motor vehicle, that is, a structural unit consisting of a drive motor and a single-stage or multi-stage, particularly switchable, transmission directly flanged to it.

[0009] In another possible implementation, the connection arrangement has one or more openings through the transverse slats of the housing. The geometry and / or the orientation of the openings on the transverse slats are specifically configured such that when acceleration is applied to the housing, if the acceleration exceeds a predetermined limit and acts with respect to the housing in a predetermined direction, lubricant does not flow from the secondary lubricant tank to the primary lubricant tank. Therefore, when another acceleration is applied to the housing, if this other acceleration is at most as strong as the predetermined limit and / or acts with respect to the housing in a direction different from the predetermined direction, lubricant is allowed to flow from the secondary lubricant tank to the primary lubricant tank. This is particularly advantageous if the machine is used as a drive or traction machine for a motor vehicle, allowing lubricant to flow back from the secondary lubricant tank to the primary lubricant tank, and vice versa, depending on the driving state, such as locking or allowing lubricant to flow back from the secondary lubricant tank to the primary lubricant tank. For example, the connection arrangement can be specifically matched to the desired lateral acceleration requirements of a motor vehicle equipped with the machine, thereby ensuring a particularly reliable supply of lubricant to the machine.

[0010] According to another possible design, the connection arrangement includes a valve device controllable by means of an electronic control unit, which controls the flow of lubricant from the secondary lubricant tank to the primary lubricant tank. Specifically, the control unit of the valve device is coupled or can be coupled to an acceleration sensor and / or a position sensor. For example, a machine or a unit in which a machine is installed, such as a motor vehicle, has an acceleration sensor and / or a position sensor coupled to the control unit of the valve device for transmitting sensor signals. Thanks to the electronically controllable valve device, the return flow of lubricant from the secondary lubricant tank to the primary lubricant tank and vice versa can be controlled more effectively and precisely in open-loop or closed-loop manner. The acceleration and / or position sensors can be used to detect the acceleration acting on the machine or motor vehicle and the position within the space of the machine or motor vehicle, thereby enabling more precise control of the valve device.

[0011] According to another possible embodiment, the housing has a separately manufactured secondary tank cover for the lubricant secondary tank, which is fixed or can be fixed to the edge of the cover opening of the lubricant secondary tank, wherein a sealing element may be arranged between the edge of the cover opening and the secondary tank cover. The sealing element may be arranged or placed in liquid or paste form, which then reacts to form a shape-stabilized seal. It is also desirable to provide the sealing element as a sealing ring with an inherently stable shape or as a sealing disc with an inherently stable shape. In particular, the secondary tank cover is clamped to the edge of the cover opening of the lubricant secondary tank, for which a threaded connection is considered, for example. Alternatively or additionally, the edge of the cover opening of the lubricant secondary tank and the secondary tank cover may be force-locked, form-locked and / or material-locked connected to each other, for example by means of welding, gluing, etc. The lubricant secondary tank can be closed or sealed particularly securely by means of the secondary tank cover by means of the sealing element. The housing particularly has a separately manufactured primary tank cover for the lubricant primary tank, which can be fixed or fixed to the edge of the cover opening of the lubricant primary tank. The descriptions given for the secondary box cover can be applied similarly to the primary box cover without any problems.

[0012] Another possible implementation proposes that a piping arrangement structure be embedded in the material body of the secondary tank cover and / or in the material body of the primary tank cover for the lubricant primary tank. The piping arrangement structure includes one or more piping channels through which fluids (gas and / or liquids), particularly lubricants, can flow. Here, the respective piping channels may lead into the respective lubricant tank at least on one side, such that they serve, for example, as inflow or return channels for the lubricant circuit of the machine. Alternatively or additionally, the piping arrangement structure has one or more electrical conductors, such as busbars, cables, etc., and / or one or more hollow channel elements for such electrical conductors. For example, the electrical conductors may be guided through such channel elements to supply operating energy to the lubricant pump of the lubricant circuit. Again, alternatively or additionally, the piping arrangement structure embedded in one or more covers may have one or more piping channels and / or one or more electrical conductors, belonging to other systems in which a housing, particularly a machine with a housing, is mounted. This thus makes particularly efficient use of the limited available structural volume of the housing.

[0013] In another possible design, the housing has a second shaft chamber for the second shaft of the machine. The first shaft chamber, the second shaft chamber, and the housing transverse slats are integrally formed together, particularly by means of common molding. The shaft chambers are spaced apart from each other along the transverse direction (y) of the housing via the housing transverse slats and are connected to each other by means of the housing transverse slats in a material-locking manner. The inner wall of the first housing interior space has a first wall portion of the outer wall of the second shaft chamber, i.e., partially formed by the first wall portion of the outer wall of the second shaft chamber. The inner wall of the second housing interior space has a second wall portion of the same outer wall of the second shaft chamber, i.e., partially formed by the second wall portion of the outer wall of the second shaft chamber. In this regard, the lubricant tank is positioned between the two shaft chambers in the transverse direction (y) of the housing and is defined or restricted by these two shaft chambers, i.e., by their outer walls. Therefore, a possible further improvement suitable for the machine is that the machine is configured as a dual-rotor machine, particularly a dual-rotor motor, having a second shaft arranged in the second shaft chamber. The second shaft is configured, for example, as the second rotor shaft of the dual-rotor machine, wherein a second stator is arranged non-rotatably within the second shaft chamber, and the second rotor shaft extends coaxially through the second stator and thus through the second shaft chamber. The dual-rotor motor is characterized by having a control device configured to control the two rotor shafts. Because the two rotor shafts combine with two stators, the dual-rotor motor has higher cooling / lubrication requirements than a motor with only one stator-rotor unit. This housing allows for particularly efficient use of available structural space within the housing of the dual-rotor machine, enabling the use of a particularly large amount of lubricant within the housing in a specific manner.

[0014] Further features of the invention can be derived from the claims, drawings, and description of the drawings. The features and combinations thereof mentioned above in the specification, as well as those shown below in the description of the drawings and / or solely in the drawings, can be used not only in the corresponding combinations given, but also in other combinations or individually, without departing from the scope of the invention. Attached Figure Description

[0015] In the attached diagram:

[0016] Figure 1 A schematic cross-sectional view of the machine is shown, the machine housing having an integrated primary lubricant tank and an integrated secondary lubricant tank.

[0017] Figure 2 A schematic cross-sectional view of the machine in its assembled state is shown; and

[0018] Figure 3 A schematic perspective view of the housing is shown, with the transmission housing directly connected to it via a flange. Detailed Implementation

[0019] In the following common description, the housing 1 for machine 2, machine 2, and motor vehicle (not shown) having machine 2 are described. In the accompanying drawings, identical and functionally identical elements are given the same reference numerals.

[0020] According to this example, the motor vehicle is implemented as a motor vehicle capable of pure electric drive or hybrid drive, and has a machine 2. Accordingly, the machine is configured as a traction motor, currently configured as a dual-rotor motor. The two rotor-stator units 3 of the motor 2 (shown only in the figure) can be controlled by means of a common control device (not shown) of the motor 2.

[0021] Machine 2, which is implemented as a dual-rotor motor, Figure 1 Exploded view of the cross section and in Figure 2The assembly is schematically shown. Machine 2, or the dual-rotor motor, has a housing 1 with an integrated lubricant tank 4, which is fluidly integrated into its lubricant circuit in the case of machine 2. In the ready-to-use state of machine 2, the lubricant tank 4 is filled with lubricant and / or coolant, currently oil. Currently, housing 1 has a first shaft chamber 5 and a second shaft chamber 6, in which one of the rotor-stator units 3 of machine 2 is arranged respectively. Each rotor-stator unit 3 has a rotor shaft, such that, in the case of machine 2, or the dual-rotor machine, each rotor shaft is coaxially arranged in one of the shaft chambers 5 and 6. Housing 1 also has a hollow first housing interior space 7 and a hollow second housing interior space 8, which are respectively located outside the shaft chambers 5 and 6. In this respect, shaft chambers 5 and 6 should not be confused with housing interior spaces 7 and 8. The first inner wall 9 of the first housing interior space 7 is formed by the first wall portion 10a of the cylindrical first shaft chamber wall 10 of the first shaft chamber 5 and the first wall portion 11a of the cylindrical second shaft chamber wall 11 of the second shaft chamber 6. The lubricant primary tank 4a, i.e., its inner wall, is formed by the first inner wall 9. The second inner wall 12 of the second housing interior space 8 is formed by the second wall portion 10b of the cylindrical first shaft chamber wall 10 and the second wall portion 11b of the cylindrical second shaft chamber wall 11. The lubricant secondary tank 4b, i.e., its inner wall, is formed by the second inner wall 12. The shaft chambers 5 and 6 are spaced apart from each other by a distance along the transverse direction y of the housing 1 via housing transverse slats 13. Here, the housing transverse slats 13 are arranged along the vertical direction z of the housing 1 between the wall portions 10a, 10b and 11a, 11b, respectively, thereby separating the lubricant tanks 4a and 4b from each other along the vertical direction z of the housing. In this example, the shaft chambers 5 and 6 and the housing transverse slats 13 are integrally formed together, and in particular, are jointly formed by a single molding process. The housing 1 has a connecting arrangement 14 passing through the housing transverse slats 13, through which the lubricant tanks 4a and 4b are fluidly connected or can be connected to each other.

[0022] exist Figure 1 It can also be seen that the housing 1 has a ventilation opening 15 that passes through the second inner wall 12 of the hollow second housing interior space 8, or more precisely on the wall portion 12a at the end of the second inner wall 12. The ventilation opening 15 is arranged and configured in such a way that it corresponds to the ventilation opening 16 of the transmission housing 17. Figure 3The machine 2 is shown in a schematic perspective view, with the transmission housing 17 directly connected to the machine by flanges. Only the housing 1 of the motor 2 and the rotor-stator unit 3 are shown. It can be seen that the ventilation openings 15 and 16 are axially aligned, thus enabling fluid communication between the lubricant secondary tank 4b and the transmission chamber surrounded by the transmission housing 17 when, or once, the transmission housing 17 and housing 1 are flanged together. This allows for pressure equalization between the lubricant secondary tank 4b and the transmission chamber.

[0023] The connecting arrangement 14 has one opening 18 or—as in this example—multiple openings 18, wherein the corresponding openings penetrate the housing transverse slats 13. The number of openings 18, the geometry of the corresponding openings 18, and the orientation of the corresponding openings 18 on the housing transverse slats 13 are specifically configured such that when acceleration is applied to the housing 1, if the acceleration is higher than a predetermined limit acceleration and acts with respect to the housing 1 in a predetermined direction, oil does not flow from the secondary lubricant tank 4b to the primary lubricant tank 4a. Conversely, when another acceleration is applied to the housing, if this other acceleration is at most as strong as the predetermined limit acceleration and / or acts with respect to the housing 1 in a direction different from the predetermined direction, oil is released to flow from the secondary lubricant tank 4b to the primary lubricant tank 4a. Because the machine 2 is currently used as a drive or traction machine for motor vehicles, the targeted design of the structure of the openings 18 can, for example, influence the return flow of oil from the secondary lubricant tank 4b to the primary lubricant tank 4a and vice versa, in relation to the driving conditions. For example, the connection arrangement structure 14 can be specifically adapted to the driving dynamics requirements of motor vehicles, especially to the desired lateral acceleration requirements of motor vehicles.

[0024] The connection arrangement 14 alternatively or additionally includes a valve device (not shown) controllable by means of an electronic control unit (not shown), by means of which the flow of oil from the secondary lubricant tank 4b to the primary lubricant tank 4a and vice versa can be controlled. In particular, the control unit of the valve device is coupled with or can be coupled with an acceleration sensor and a position sensor. For example, a motor vehicle has an acceleration sensor and a position sensor, which are coupled with the control unit of the valve device for transmitting sensor signals.

[0025] from Figure 1It can also be seen that a cover 19 and a cover 20 are respectively provided for the corresponding lubricant tanks 4a and 4b, by means of which the corresponding lubricant tanks 4a and 4b can be closed. Therefore, the housing 1 here in this example includes a primary tank cover 19 for the primary lubricant tank 4a and a secondary tank cover 20 for the secondary lubricant tank 4b. The secondary tank cover 20 can be fixed to the cover opening edge 21 of the secondary lubricant tank 4b, currently via a screw connection device, which includes an externally threaded screw 22 and an internally threaded hole 23 on the cover opening edge 21. According to this example, a sealing element 24 is arranged between the secondary tank cover 20 and the cover opening edge 21. Figure 1 Detail A in the diagram shows that the sealing element 24 may have a through opening 24a corresponding to the external threaded screw 22.

[0026] exist Figure 1 It can also be seen that a pipeline arrangement structure 25 is embedded in the material body of the primary cover 19 and the secondary cover 20, respectively. The pipeline arrangement structure 25 includes pipeline elements 26, and there are multiple such pipeline elements 26, wherein the respective pipeline elements 26 are configured, for example, as pipeline channels through which fluid can flow. Here, the respective pipeline channels can lead into the respective lubricant tanks 4a, 4b at least on one side, such that the pipeline channels serve, for example, as inflow or return channels for the lubricant circuit of machine 2. Alternatively or additionally, one or more of the pipeline elements 26 can be configured as electrical conductors, for example, as busbars, cables, etc. Furthermore, it is conceivable that one or more of the pipeline elements 26 can be configured as hollow channel elements for such electrical conductors. The pipeline arrangement structure 25 embedded in one or more covers 19, 20 can have one or more pipeline elements 26, which / these pipeline elements belong to other systems, i.e., not to machine 2. Figure 1 As is clear, for example, the transmission housing 17 has a pipeline element 27, which corresponds in position and geometry to the pipeline element 26 of the housing 1 or the secondary cover 20. Specifically, it is specified that the pipeline elements 26, 27 are connected to each other in a prescribed mounting position, particularly in fluid connection.

[0027] In addition Figure 1 As can be seen, a lubricant pump 28 is arranged in the lubricant main tank 4a. The suction and pressure sides 29 of this lubricant pump can be integrated or incorporated into the lubricant circuit via the piping arrangement structure 25 of the primary tank cover 19. The primary tank cover 19 can be fixed to the cover opening edge 30 of the lubricant primary tank 4a via another threaded connection device, which has an external threaded screw 31 and an internal threaded hole 32 belonging to the cover opening edge 30. Another sealing element can be arranged between the primary tank cover 19 and the cover opening edge 30.

[0028] In addition, Figure 1 The diagram shows cover element 33, which separates the housing 1 and the control room area 34 from each other. The control room area 34 contains, in particular, the control devices for the machine 2 and / or other components necessary for the prescribed operation of the machine 2.

[0029] The following possibilities are illustrated by the housing 1, machine 2, and motor vehicle: how to implement cooling / lubrication for machine 2 in a particularly efficient or compact manner within the structural space. The core concept of the invention is to create oil or lubricant volumes by utilizing previously non-functional or unused areas or portions of machine 2.

[0030] List of reference numerals

[0031] 1. Shell

[0032] 2 machines

[0033] 3 rotor-stator units

[0034] 4 Lubricant Main Box

[0035] 4a Lubricant Primary Tank

[0036] 4b Lubricant Secondary Box

[0037] 5 First Axis Chamber

[0038] 6 Second Axis Chamber

[0039] 7. The internal space of the hollow first shell

[0040] 8. Hollow second shell internal space

[0041] 9 First inner wall

[0042] 10 axis chamber wall

[0043] 10a First Wall Section

[0044] 10b Second Wall Section

[0045] 11 axis chamber wall

[0046] 11a First Wall Section

[0047] 11b Second Wall Section

[0048] 12 Second Inner Wall

[0049] 12a end side wall portion

[0050] 13 Horizontal slats of the shell

[0051] 14 Connection Arrangement Structure

[0052] 15 ventilation openings

[0053] 16 ventilation openings

[0054] 17 Transmission Housing

[0055] 18 openings

[0056] 19 Primary Box Lid

[0057] 20 secondary box lid

[0058] 21. Lid opening edge

[0059] 22 external thread screw

[0060] 23 Internal threaded hole

[0061] 24 sealing elements

[0062] 24a Through Opening

[0063] 25 Pipeline Layout Structure

[0064] 26 pipeline components

[0065] 27 Pipeline Components

[0066] 28 Lubricant Pump

[0067] 29 Suction and Pressure Side

[0068] 30 cap opening edge

[0069] 31 External Thread Screw

[0070] 32 internal threaded hole

[0071] 33 cover elements

[0072] 34 Control Room Area

[0073] A detail

[0074] x Longitudinal direction of the shell

[0075] y shell lateral direction

[0076] z-shell vertical direction

Claims

1. Housing (1) for a machine (2), having: a first shaft chamber (5); and outside this first shaft chamber: a hollow first housing interior (7), the inner wall (9) of which is formed by a first wall portion (10a) of a shaft chamber outer wall (10) of the shaft chamber (2) and forms a lubricant primary tank (4a) of the housing (1); a hollow second housing interior (8), the inner wall (12) of which is formed by a second wall portion (10b) of the same shaft chamber outer wall (10) and forms a lubricant secondary tank (4b) of the housing (1); a housing cross web (13) arranged between the wall portions (10a, 10b), by means of which the lubricant tanks (4a, 4b) are delimited from one another; a connection arrangement (14) through the housing cross web (13), by means of which the lubricant tanks (4a, 4b) are fluidically connected or connectable to one another.

2. The housing (1) according to claim 1, characterized in that a ventilation opening (15) is provided, which passes through the inner wall (12) of the hollow second housing interior (8).

3. Housing (1) according to claim 1 or 2, characterized in that the connection arrangement (14) has one or more openings (18) through the housing cross web (13), and the number of openings (18), the geometry of the respective opening (18) and / or the position of the respective opening (18) on the housing cross web (13) are configured in such a way that, when an acceleration acts on the housing (1), lubricant does not flow from the lubricant secondary tank (4b) into the lubricant primary tank (4a) if the acceleration is above a predetermined limit acceleration and acts in a predetermined direction with respect to the housing (1).

4. The housing (1) according to one of the preceding claims, characterized in that the connection arrangement (14) has a valve device which can be controlled by means of an electronic control unit, by means of which the flow of lubricant from the lubricant secondary tank (4b) into the lubricant primary tank (4a) can be controlled.

5. The housing (1) according to one of the preceding claims, characterized in that a secondary tank cover (20) for the lubricant secondary tank (4b) is provided, which is fixed or fixable on a cover opening edge (21) of the lubricant secondary tank (4b), wherein, in particular, a sealing element (24) is arranged between the cover opening edge (21) and the secondary tank cover (20).

6. The housing (1) according to claim 5, characterized in that a line arrangement (25) is embedded in the secondary tank cover (20) and / or in a primary tank cover (19) for the lubricant primary tank (4a).

7. The housing (1) according to one of the preceding claims, characterized in that a second shaft chamber (6) is provided, wherein the shaft chambers (5, 6) are spaced apart from one another by a distance along a transverse direction (y) of the housing (1) via the housing cross web (13) and are connected to one another via the housing cross web, wherein the inner wall (9) of the first housing interior (7) is formed by a first wall portion (11a) of a shaft chamber outer wall (11) of the second shaft chamber (6), the inner wall (12) of the second housing interior (8) is formed by a second wall portion (11b) of the same shaft chamber outer wall (11).

8. Machine (2), in particular electric machine, having: a housing (1) embodied in accordance with one of the preceding claims; a first shaft, which is arranged coaxially in the first shaft chamber (5), a lubricant circuit, into which the lubricant tank (4a, 4b) is integrated.

9. The machine (2) according to claim 8, characterized in that, The housing (1) has the features given in claim 7, wherein the machine (2) is configured as a double-rotor electric machine, a first shaft of which is embodied as a first rotor shaft, and a second rotor shaft of the double-rotor machine is arranged in the second shaft chamber (6), wherein a control device is configured to control both rotor shafts.

10. Motor vehicle with a machine (2) embodied in accordance with claim 8 or 9.

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