Cooling and lubricating device for an electric drive device of a motor vehicle, in particular a motor vehicle

Abstract

Cooling and lubricating device (12) for an electric drive device (14) of a motor vehicle, with a filter unit (10) which has: - a filter housing (38), with: ◯ a receiving space (40) designed to at least temporarily receive a coolant and lubricant (22) for cooling and lubricating the drive device (14), which has a first suction space (42) as the first subspace of the receiving space (40) and a second suction space (44) as the second subspace of the receiving space (40); ◯ an inlet opening (46) through which the coolant and lubricant (22) can be introduced from a sump (26) into the receiving space (40) and fed to the suction spaces (42, 44); ◯ a first suction connection (50), via which the coolant and lubricant (22) can be sucked out of the first suction chamber (42) by means of a first pump (54); and ◯ a second suction connection (52), via which the coolant and lubricant (22) can be sucked out of the second suction chamber (44) by means of a second pump (56); and - at least one filter device (58) through which the coolant and lubricant (22) can flow and which is arranged in the filter housing (38), via which filter device the coolant and lubricant (22) introduced into the receiving space (40) via the inlet opening (46) can be fed from the sump (26) to the suction spaces (42, 44), the first suction space (42) and the second suction space (44) being hydraulically separated from one another; characterized in that the receiving space (40) has a further sub-space (70) common to the intake spaces (42, 44), wherein a second filter device (72) is arranged in the filter housing (38), which is arranged between the first intake space (42) and the further sub-space (70) and between the second intake space (44) and the further sub-space (70), so that the coolant and lubricant (22) can be introduced from the further sub-space (70) into the intake spaces (42, 44) via the second filter device (72).

Description

[0001] The invention relates to a cooling and lubricating device for an electric drive device of a motor vehicle, in particular a motor car, according to the preamble of patent claim 1.

[0002] DE 10 2020 130 326 B4 discloses a hydraulic system for an electrically operated drive train of a motor vehicle, comprising a hydraulic reservoir for storing hydraulic fluid, a first hydraulic pump, and a second hydraulic pump. JP 2011-174 413 A, JP 2019-215 028 A, JP 2019-215 029 A, and JP 2019-215 031 A each disclose an oil separator. Furthermore, US 2019 / 0 111 361 A1 discloses a non-return valve for a fluid filter.

[0003] The object of the present invention is to provide a cooling and lubricating device for an electric drive device of a motor vehicle, so that a particularly advantageous delivery of a coolant and lubricant can be realized.

[0004] This object is achieved by a cooling and lubricating device having the features of patent claim 1. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims.

[0005] The invention relates to a cooling and lubricating device for an electric drive device of a motor vehicle. This means that the motor vehicle, also simply referred to as a vehicle and preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state has the electric drive device and thus the cooling and lubricating device, which is, for example, a component of the electric drive device. The cooling and lubricating device has a filter unit which has a filter housing. The filter housing delimits a receiving space, in particular directly, in which a coolant and lubricant, also simply referred to as a fluid and preferably designed as a liquid, can be at least temporarily received for cooling and lubricating the drive device. For example, the receiving space is delimited, in particular directly, by an inner circumferential surface of the filter housing.For example, the cooling and lubricating device has a circuit through which the fluid (coolant and lubricant) can flow, which is also simply referred to as a circuit. In this case, for example, the filter unit and thus the filter housing are arranged in the circuit. The coolant and lubricant can therefore flow through the filter unit, in particular the filter housing and very particularly the receiving space. The coolant and lubricant is very preferably an oil. As will be explained in more detail below, the coolant and lubricant (fluid) can be filtered on its way through the filter housing and thus through the receiving space, whereby, for example, any particles contained in the fluid can be filtered out of the fluid.

[0006] The receiving space has a first intake space, which is a first part, thus a first sub-space, of the receiving space. Furthermore, the receiving space has a second intake space, which is a second part, thus a second sub-space, of the receiving space. The filter housing, which is preferably designed as a solid body and is therefore preferably inherently rigid and therefore dimensionally stable, has, in particular, at least or precisely, one inlet opening, which is particularly designed as a first through-opening that completely penetrates the filter housing. Via the inlet opening, the fluid, thus the coolant and lubricant, can be introduced from a sump into the receiving space and thus into the filter housing and supplied to the intake spaces. In particular, the sump is arranged outside the filter housing in the fully manufactured state of the electric drive device, which is thus arranged or can be arranged in the coolant and lubricant sump.Since the fluid from the sump can be introduced into the receiving chamber and fed to the intake chambers via the inlet opening, the inlet opening is also referred to as the sump opening. In particular, when the electric drive device is fully manufactured, the sump is arranged in the circuit so that the fluid (coolant and lubricant) can be at least temporarily absorbed in the sump.

[0007] Furthermore, the filter housing has a first suction port through which the coolant and lubricant can be sucked in from the first intake chamber by means of a first pump. Preferably, the first pump is a component of the cooling and lubricating device. For example, the first pump is arranged in the circuit.

[0008] The first pump is very preferably a first electric pump, and therefore a first electrically operated pump. The filter housing furthermore has a second suction connection, which is provided in particular in addition to the first suction connection and via which the coolant and lubricant (fluid) can be sucked in from the second suction chamber by means of a second pump, which is provided in particular in addition to the first pump. The second pump is preferably a component of the cooling and lubricating device, in particular of the electric drive device. Very particularly, the second pump is arranged in the circuit. The second pump can be a second electrically operated pump, and therefore a second electric pump. For example, the first pump has a first suction side and a first pressure side.The first pump can, in particular by operating the first pump and thus during its operation, suck in the fluid from the first suction chamber on its or via its suction side and thus pump it towards itself. The fluid pumped by the first pump can flow through the first pump and be pumped away from the first pump by the first pump on or via the first pressure side of the first pump. Accordingly, the second pump, for example, has a second suction side and a second pressure side. The second pump can suck in the fluid from the second suction chamber on its or via its second suction side and thus pump it towards itself. The fluid pumped by the second pump can be pumped through the second pump by the second pump and pumped away from the second pump on or via the second pressure side.Thus, the respective pump conveys the respective fluid from the respective suction chamber from its respective suction side to its respective pressure side and thus away from itself via its respective pressure side.

[0009] Furthermore, the filter unit has at least one filter device arranged in the filter housing and through which the coolant and lubricant flowing, in particular through the receiving space, can flow, via which the coolant and lubricant introduced into the receiving space via the inlet opening from the sump can be fed to the intake spaces. This means that the coolant and lubricant from the sump can flow through the inlet opening and thus into the receiving space, and thus into the filter housing. The fluid (coolant and lubricant) flowing into the receiving space and thus into the filter housing via the inlet opening can, after flowing through the inlet opening, flow through the filter device and, in particular, then flow to and into the intake spaces.In other words, on its way from the sump to and into the intake chambers, the fluid first flows through the inlet opening and then through the filter device, and then flows to and into the intake chambers. The filter device can filter the fluid flowing through the filter device, so that, for example, the aforementioned particles possibly contained in the fluid can be removed from the fluid.

[0010] In order to be able to convey the coolant and lubricant particularly advantageously, so that a particularly advantageous supply of the electric drive device with the fluid (coolant and lubricant) can be achieved, the invention provides that the first suction chamber and the second suction chamber are hydraulically separated from one another. Thus, for example, if one of the pumps is operated while the other pump is not operated and is thus deactivated, then due to the hydraulic separation of the suction chambers, one pump sucks in the fluid from the suction chamber assigned to one pump, but one pump does not suck out the suction chamber assigned to the other pump and / or one pump does not suck in the fluid from the suction chamber assigned to the other pump.This prevents an excessive air content in the fluid, hence an excessive amount of air in the fluid, thus preventing excessive foaming or frothing of the fluid. The invention is based in particular on the following findings and considerations: The first pump and the second pump can be used to supply the electric drive device with the coolant and lubricant in a particularly demand-oriented manner.If, for example, one pump is operated while the other pump is not operated and is thus deactivated, a first sub-area of ​​the electric drive device assigned to one pump is supplied with the coolant and lubricant delivered by one pump, while a second sub-area of ​​the electric drive device, which is different from the first sub-area and is provided in addition to the first sub-area, is not supplied with the coolant and lubricant. If, for example, both pumps are operated, in particular simultaneously, the first sub-area of ​​the electric drive device is supplied with the coolant and lubricant delivered by one pump, and the second sub-area of ​​the electric drive device is supplied, in particular simultaneously, with the coolant or lubricant delivered by the other pump.This ensures that the electric drive device is supplied with coolant and lubricant in a needs-based, effective and efficient manner. The first sub-area comprises, for example, at least one or exactly one electric machine of the electric drive device, wherein it is particularly conceivable for the first sub-area to have at least one or exactly two electric machines of the electric drive device. By means of the electric drive device, in particular by means of the respective electric machine, the motor vehicle can be driven, in particular purely electrically. The second sub-area comprises, for example, at least one or exactly one transmission, so that the second sub-area comprises, for example, transmission components of the transmission. Furthermore, it is conceivable for the first sub-area to comprise the electric machine and the transmission and thus the transmission components.The second sub-area comprises, for example, at least one or more multi-plate clutches and / or other, further switching elements. For example, in a main driving range, one pump, which is, for example, the first pump, is operated continuously, while the other pump, which is in particular the second pump, is only operated briefly and thus temporarily during dynamic driving maneuvers, in particular with high longitudinal and / or lateral dynamics. So that, for example, when one pump is operated, in particular continuously and thus without interruption, for a period of time, the other pump is not operated during at least or exactly a first part of the period of time and is operated during at least or exactly a second part of the period of time. In particular, after the electric drive device has been supplied with the fluid, the fluid can flow from the electric drive device back to and into the sump.In other words, the fluid can flow from the respective sub-area back into the sump common to the sub-areas and collect there, so that the sump is located, for example, in a return line, such that both the fluid flowing away from the first sub-area and the fluid flowing away from the second sub-area can flow to and into the sump and collect there. Accordingly, the pumps suck in the fluid from the same sump, but via the respective suction chamber. This means that when the respective pump is operated, the respective pump sucks in the fluid via the respective suction chamber assigned to the respective pump, thus pumping it through the inlet opening, then pumping it into the respective suction chamber assigned to the respective pump and sucking it in via the respective suction chamber assigned to the respective pump.The first suction chamber is assigned to the first pump, and the second suction chamber is assigned to the second pump. It has been found that direct hydraulic coupling of the pumps on the suction sides should be avoided, since otherwise, for example, in a fluid circuit in which the other pump is arranged, unwanted backflow and unwanted suction of air into channels through which the fluid can flow can occur. The said fluid circuit is, for example, a partial circuit of the previously mentioned circuit. If the electric drive device has a high cooling and lubrication requirement, one pump can deliver a large volume flow of fluid.This means that a large amount of fluid in the electric drive device is circulated several times a minute when there is a high volume flow requirement. The fluid cannot degas sufficiently due to the short residence time in the sump, so that a high gas content can develop in the fluid. Such a high gas content in the fluid can lead to the fluid being able to dissipate less heat in relation to the volume of fluid pumped. The problems and disadvantages mentioned above can now be avoided. Because the suction chambers are hydraulically separated from one another, the suction chambers are hydraulically decoupled from one another. A direct hydraulic coupling of the aforementioned fluid circuit as the first fluid circuit, in which the other pump is arranged, with a second fluid circuit, in which one pump is arranged, can be avoided. In this case, the second fluid circuit is, for example, a second sub-circuit of the circuit.As a result, unwanted backflow of the fluid, for example in the form of oil, as well as unwanted intake of air into channels through which the fluid flows, particularly in the circuit, can be avoided. Furthermore, an at least substantially closed return of the fluid, particularly from the electric motor, to the sump can be realized, especially with large fluid flow rates.

[0011] In the invention, the receiving space has a further sub-space common to the intake spaces, which is also referred to as a fourth sub-space. Thus, the further sub-space is a further part, in particular a fourth part, of the receiving space. The aforementioned filter device is also referred to as the first filter device. In this case, a second filter device, provided in particular in addition to the first filter device, is arranged in the filter housing and is arranged between the first intake space and the further sub-space and between the second intake space and the further sub-space. Thus, for example, the respective intake space is subdivided or separated from the further sub-space by means of the second filter device. On its way from the further sub-space to and into the respective intake space, the fluid flows through the second filter device and is thereby filtered, for example, by means of the second filter device.Thus, the coolant and lubricant can be introduced from the additional subchamber into the intake chambers via the second filter device. This allows for particularly advantageous guidance and conveyance of the fluid in a particularly space-efficient manner, while allowing the fluid to be filtered particularly effectively.

[0012] In order to be able to hydraulically separate the intake chambers from one another in a particularly advantageous manner, one embodiment of the invention provides that the filter unit has a partition wall arranged in the receiving chamber, by means of which the intake chambers are hydraulically separated from one another. In particular, the partition wall is arranged downstream of the filter device, also referred to as the filter medium or comprising a filter medium, and in particular upstream of the respective pump, in the flow direction of the fluid flowing through the intake chambers and from the respective intake chamber to the respective pump.

[0013] In a further, particularly advantageous embodiment of the invention, it is provided that the receiving chamber has a third subchamber common to the intake chambers, which thus forms a third part of the receiving chamber. The inlet opening opens, in particular directly, into the third subchamber. In particular, it is provided that, particularly in the fully manufactured state of the electric drive device, the inlet opening opens, on the one hand, or at one end, in particular directly, into the sump and, on the other hand, or at the other end, in particular directly, into the third subchamber.It is further preferably provided that the filter device arranged in the filter housing is arranged between the first intake chamber and the third sub-chamber and between the second intake chamber and the third sub-chamber, such that the filter device is arranged downstream of the third sub-chamber and upstream of the intake chambers in the flow direction of the fluid (coolant and lubricant) flowing through the filter housing or the receiving chamber. Thus, the coolant and lubricant can be introduced from the third sub-chamber into the intake chambers via the filter device, such that the fluid flows through the filter device on its way from the third sub-chamber into the respective intake chamber and is thereby filtered. This ensures particularly advantageous guidance and conveyance of the fluid.

[0014] A further exemplary embodiment is characterized in that the third sub-chamber, in the installed position of the cooling and lubricating device, which assumes its installed position in the fully manufactured state of the motor vehicle comprising the cooling and lubricating device, also simply referred to as a vehicle, is arranged in the vertical direction of the vehicle below at least respective sub-regions of the intake chambers. Thus, for example, the fluid flows on its way through the receiving chamber from the third sub-chamber upwards in the vertical direction of the vehicle and thereby into the respective intake chamber, whereupon the fluid flows or can flow, for example, towards the respective pump. This makes it possible to achieve particularly advantageous guidance and conveyance of the fluid, so that the fluid can be filtered in a space-saving and particularly advantageous manner on its way through the circuit. Furthermore, excessive foaming or frothing can be avoided.

[0015] The third subchamber is also called the sump connection chamber, since the inlet opening opens directly into the third subchamber. The intake chambers are also called suction chambers.

[0016] In a further, particularly advantageous embodiment of the invention, the filter housing has at least one return connection provided in addition to the suction connections and opening into the further sub-chamber, via which return connection the coolant and lubricant can be introduced into the further sub-chamber after cooling and lubricating at least a sub-region of the drive device. In particular, for example, the return connection opens directly into the further sub-chamber. The at least one sub-region from which the fluid can be introduced into the further sub-chamber via the return connection, in particular directly, is preferably the first sub-region assigned to the one pump, in particular the first pump.The fluid flowing from or away from the second sub-region, and in this case, for example, from the transmission, can, for example, be guided into the sump, in particular bypassing the receiving space and thus without flowing through the receiving space, so that, for example, the fluid bypasses the receiving space on its way from the second sub-region to and into the sump, and therefore does not flow into the sump via the receiving space, but the fluid flowing away from or away from the second sub-region can flow into the sump, bypassing the receiving space and only then flow into the receiving space via the inlet opening, in particular be sucked or pumped by means of the respective pump. This allows a particularly advantageous guidance and pumping of the fluid to be achieved, in particular without an excessive amount of a gas, such as air, being absorbed in the fluid.

[0017] A further embodiment is characterized in that the additional subchamber is arranged above the intake chambers in the vertical direction of the vehicle when the cooling and lubricating device is installed. This allows for a particularly advantageous fluid guidance, in particular without excessive foaming or frothing of the fluid.

[0018] In a further, particularly advantageous embodiment of the invention, it is provided that, in the installed position of the cooling and lubricating device, the second filter device is arranged above the first filter device in the vertical direction of the vehicle and, in particular, is spaced apart from the first filter device. As a result, the fluid can be filtered particularly advantageously by means of the filter device, and the fluid can be sucked in and pumped by the pumps as needed without excessive foaming or frothing occurring, i.e., without an excessive amount of a gas, such as air, being absorbed into the fluid.

[0019] A further embodiment is characterized in that the further subspace is designed as a closed space, with the exception of at least one or precisely one vent opening formed, for example, in the filter housing for venting the further subspace. This allows the subspace to be advantageously vented, thereby preventing an excessive gas content in the fluid.

[0020] It has proven particularly advantageous if the vent opening is provided in addition to the inlet opening and is spaced apart from the inlet opening. Furthermore, it has proven particularly advantageous if the vent opening is arranged above the additional subchamber in the vertical direction of the vehicle when the cooling and lubricating system is installed.

[0021] Finally, it has proven particularly advantageous if the filter device has exactly four chambers: the first intake chamber, the second intake chamber, the third sub-chamber, and the further sub-chamber. This allows the fluid to be conveyed and guided particularly effectively without excessive foaming or frothing of the fluid.

[0022] For example, the return connection, also referred to as a connecting piece or designed as a connecting piece, has a projection, in particular such that the projection, also referred to as the connection projection, and thus the return connection, protrudes into the further subchamber, particularly downwards in the vertical direction of the vehicle when the cooling and lubricating device is installed. This allows the fluid to be introduced into the further subchamber particularly advantageously, in particular without excessive foaming or frothing of the fluid.

[0023] The coolant and lubricant returning from, in particular from, the first sub-region and thus from, in particular from, the electric machine is, for example, a return coolant which flows from, in particular from, a stator of the electric machine. The stator of the electric machine can thus be cooled by means of the fluid. Thus, it is provided, for example, that the first sub-region comprises the stator of the electric machine. For example, the stator is arranged in a stator cooling circuit through which the fluid can flow, in order to thereby cool the stator. Preferably, the stator cooling circuit is designed at least substantially as a closed system, in particular with a closed lubricant return to a suction region of the pump. For this purpose, the stator cooling circuit is, for example, connected to the return connection and thus fluidically connected to the further sub-chamber via the return connection.This prevents excessive foaming in the fluid, as the fluid is guided through the stator cooling circuit, also simply referred to as the stator circuit, and thus in a closed circuit, where it can then collect and settle in the further sub-chamber and, in particular, be vented via the vent opening.

[0024] Also disclosed is a motor vehicle, also simply referred to as a vehicle, which is preferably designed as a motor vehicle, in particular a passenger car, and has an electric drive device and a cooling and lubricating device according to the invention. By means of the electric drive device, the motor vehicle can be driven, in particular purely electrically. For this purpose, the electric drive device comprises at least one electric machine, in particular at least or exactly two electric machines. Advantages and advantageous embodiments of the cooling and lubricating device according to the invention are to be regarded as advantages and advantageous embodiments of the motor vehicle, and vice versa.

[0025] Further advantages, features, and details of the invention will become apparent from the following description of a preferred embodiment and from the drawings. The features and combinations of features mentioned above in the description, as well as the features and combinations of features 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.

[0026] The drawing shows: Fig. 1 is a schematic sectional view of a filter unit of a cooling and lubricating device for an electric drive device of a motor vehicle; Fig. 2 a further schematic sectional view of the filter unit; Fig. 3 a schematic sectional view of the filter unit along a Fig. 2 shown section plane AA; Fig. 4 a schematic sectional view of the filter unit along a Fig. 2 shown section plane BB; Fig. 5 a schematic representation of the electric drive device; Fig. 6 a hydraulic circuit diagram of the cooling and lubrication system; Fig. 7 a schematic plan view of the filter unit; Fig. 8 a schematic front view of the filter unit; Fig. 9 a schematic perspective view of the filter unit; Fig. 10 is a further schematic perspective view of the filter unit; Fig. 11 a schematic and sectional perspective view of the filter unit; Fig. 12 a further schematic and sectional perspective view of the filter unit; Fig. 13 a further schematic and perspective sectional view of the filter unit; Fig. 14 is a further schematic and sectional perspective view of the filter unit; Fig. 15 a further schematic and perspective sectional view of the filter unit; Fig. 16 a further schematic and sectional perspective view of the filter unit; Fig. 17 a schematic sectional view of the filter unit; and Fig. 18 another schematic and sectioned perspective view of the filter unit.

[0027] In the figures, identical or functionally identical elements are provided with the same reference numerals.

[0028] Fig. 1 and Fig. 2 each show a schematic and sectional side view of a filter unit 10 of a cooling and lubricating device 12 ( Fig. 6) for an electric drive device 14 ( Fig. 5) of a motor vehicle, also simply referred to as a vehicle, which can be driven by means of the electric drive device 14, in particular purely electrically. The electric drive device 14 has at least or in this case exactly two electric machines 16 and 18, by means of which the motor vehicle can be driven, in particular purely electrically. For example, the respective electric machine 16, 18 has a respective stator and a respective rotor, which can be driven by means of the respective stator and is thus rotatable relative to the respective stator. In addition, the electric drive device 14 has a Fig. 5 shows a particularly schematically illustrated transmission 20, which comprises transmission components. The cooling and lubricating device 12 has a circuit 24, also simply referred to as a circuit, through which a preferably liquid coolant and lubricant 22 can flow. The circuit 24 contains the electrical machines 16 and 18, a sump 26, a cooling device 28 for cooling the coolant and lubricant 22, and a pumping device 30, by means of which the coolant and lubricant 22 can be conveyed from the sump 26 to the electrical machines 16 and 18 and to the transmission 20 and thus to the transmission components. As a result, the electrical machines 16 and 18 and the transmission 20 can be cooled and / or lubricated by means of the coolant and lubricant 22. The coolant and lubricant 22 is also referred to as a fluid and is preferably an oil.The circuit 24 has a first branch 32 through which the fluid (coolant and lubricant 22) conveyed from the sump 26 by means of the pumping device 30 can flow, which is also referred to, for example, as the first fluid branch. It can be seen that the electrical machines 16 and 18 are arranged in the first branch 32, so that the fluid flowing through the first branch 32 can be supplied to the electrical machines 16 and 18, in particular to the respective stator of the respective electrical machine 16, 18, by means of the first branch 32. In addition, the circuit 24 has a second branch 34 through which the fluid (coolant and lubricant 22) conveyed from the sump 26 by means of the pumping device 30 can flow, and by means of which the coolant and lubricant 22 flowing through the second branch 34 can be supplied to the transmission 20 and thus to the transmission components.The coolant and lubricant 22 contained in the sump 26 is designated by 22, wherein the coolant and lubricant 22 is contained or can be contained in the sump 26, forming a fill level 36, also referred to as a level. The fill level 36 is also colloquially referred to as a level.

[0029] Out of Fig. 5 shows that the filter unit 10 is arranged in the circuit 24 and, in this case, in the sump 26, and can therefore be flowed through by the fluid flowing through the circuit 24 (coolant and lubricant 22). The filter unit 10 has a filter housing 38, which is in this case designed as a solid and is inherently rigid, thus dimensionally stable, and which delimits a receiving space 40, in particular directly. The coolant and lubricant 22 can be at least temporarily received in the receiving space 40. The coolant and lubricant 22 flowing through the circuit 24 can flow through the receiving space 40 and, thus, the filter housing 38.

[0030] Looks particularly good Fig. 1 to 4, it can be seen that the receiving space 40 has a first suction chamber 42 as the first sub-chamber, thus as the first part of the receiving space 40. Furthermore, the receiving space 40 has a second suction chamber 44 as the second sub-chamber, i.e. as the second part of the receiving space 40. The suction chambers 42 and 44 are also referred to as suction chambers. Furthermore, the filter housing 38 has an inlet opening 46, through which, as in Fig. 4 is represented by an arrow 48, the coolant and lubricant 22 can be introduced from the sump 26 and thus from outside the filter housing 38 into the receiving space 40 and fed to the suction spaces 42 and 44. Furthermore, the filter housing 38 has a first suction connection 50 and a second suction connection 52 provided in addition to the first suction connection 50.

[0031] Fig. 6 shows a hydraulic circuit diagram of the cooling and lubricating device 12. The pump device 30 and thus the cooling and lubricating device 12 has a first pump 54 and a second pump 56. Since, for example, the coolant and lubricant 22 is in the form of oil, the respective pump 54, 56 is also referred to, for example, as an oil pump. The first branch 32 is also referred to, for example, as the first fluid circuit, and the second branch 34 is also referred to, for example, as the second fluid circuit. For example, the pump 54 is arranged in the first branch 32, and the pump 56 is arranged, for example, in the second branch 34. For example, the respective pump 54, 56 is designed as an electrically operated pump.The first pump 54 can suck in the fluid (coolant and lubricant 22) from the first suction chamber 42 via the first suction connection 50, wherein the pump 54 can suck in the coolant and lubricant 22 from the sump 26 via the suction connection 50 and the suction chamber 42 and the inlet opening 46 and can thereby convey it into the suction chamber 42 and convey it from the suction chamber 42 towards itself via the suction connection 50. Accordingly, the coolant and lubricant 22 can be sucked in from the second suction chamber 44 via the second suction port 52 by means of the second pump 56, so that the pump 56 can suck in the coolant and lubricant 22 from the sump 26 via the suction port 52 and the suction chamber 44 and the inlet opening 46 and thus suck it into the suction chamber 44 and convey it from the suction chamber 44 to itself via the suction port 52.By means of the pump 54, the fluid (coolant and lubricant 22) conveyed by the pump 54 can be conveyed through the first branch 32 and thereby conveyed to the electrical machines 18 and 16, that is to say at least to a respective sub-area of ​​the respective electrical machines 16, 18, so that at least the respective sub-area of ​​the respective electrical machine 16, 18 can be supplied with the fluid (coolant and lubricant 22) conveyed by the pump 54. Thus, the electrical machines 16 and 18 are assigned to the pump 54 and vice versa, since the pump 54 can supply the electrical machines 16 and 18 with the coolant and lubricant 22 from the sump 26. By means of the pump 56, the coolant and lubricant 22 conveyed, and thus sucked in, by the pump 56 can be conveyed from the sump 26 to the transmission 20.Thus, the pump 56 is assigned to the gearbox 20 and vice versa, since the gearbox 20 can be supplied by means of the pump 56 with the coolant and lubricant 22 pumped by the pump 56 from the sump 26.

[0032] The filter unit 10 also has a first filter device 58, through which the coolant and lubricant 22 can flow and which is arranged in the filter housing 38. The coolant and lubricant 22 introduced into the receiving space 40 via the inlet opening 46 from the sump 26 can be fed to the intake spaces 42 and 44. This means that the coolant and lubricant 22 introduced or introduced into the receiving space 40 via the inlet opening 46 from the sump 26 flows through the filter device 58 on its way to the intake spaces 42 and 44 and is filtered by the filter device 58.

[0033] In order to convey the fluid particularly advantageously and to guide or direct it to the electric drive device 14, in particular to the electric motors 16 and 18 and to the transmission 20, the intake chambers 42 and 44 are hydraulically separated from one another. For this purpose, the filter unit 10 has a partition wall 60 arranged in the receiving chamber 40 and designed as a solid body and thus inherently rigid and dimensionally stable, as well as impermeable to the coolant and lubricant 22, which is also referred to as a separating web. Fig. 2, an arrow 48 illustrates the coolant and lubricant 22 flowing through the inlet opening 46 and thus flowing into the filter housing 38, thus into the receiving chamber 40, via the inlet opening 46, and flowing to and into the intake chamber 42, which coolant and lubricant 22 flows through the first filter device 58 on its way from the inlet opening 46 to and into the intake chamber 42 and is thus filtered by the first filter device 58. Accordingly, Fig. 3 an arrow 64 the coolant and lubricant 22 flowing through the inlet opening 46 and thus via the inlet opening 46 into the receiving space 40 and thus into the filter housing 38 and flowing from the inlet opening 46 to and into the suction space 44, which on its way from the inlet opening 46 to and into the suction space 44 flows through the filter device 58 and is thus filtered by means of the filter device 58.

[0034] Out of Fig. 3 and Fig. 4, it can be seen that, for example, the first filter device 58 has a first filter region F1, also referred to as a first suction filter, by means of which, for example, the coolant and lubricant 22 is filtered on its way from the inlet opening 46 into the suction chamber 42. Furthermore, the first filter device 58 has, for example, a second filter region F2, which, for example, filters the coolant and lubricant 22 on its way from the inlet opening 46 into the suction chamber 44. The filter regions F1 and F2 are also referred to as suction filters and can, for example, be formed separately from one another, or the filter regions F1 and F2 are formed integrally with one another, thus formed from a single piece.In the flow direction of the fluid (coolant and lubricant 22) flowing from the inlet opening 46 into the respective intake chamber 42, 44 and the respective suction connection 50, 52, the first filter device 58 is arranged downstream of the inlet opening 46 and upstream of the pumps 54 and 56, in particular upstream of the suction connections 50 and 52 and most particularly upstream of the intake chambers 42 and 44. Particularly well suited. Fig. 1 and Fig. 2 that the receiving space 40 has a third sub-space 66 common to the intake spaces 42 and 44, wherein the inlet opening 46 opens, in particular directly, into the third sub-space 66. It can be seen that the inlet opening 46 is formed in a base 68 of the filter housing 38, wherein in the installed position of the cooling and lubricating device 12, which assumes its installed position in the fully manufactured state of the motor vehicle having the cooling and lubricating device 12, the receiving space 40 is delimited downwards in the vertical direction of the motor vehicle by the base 68. Fig. 1 and Fig. 2 the filter unit 10 in the installed position of the cooling and lubricating device 12. It can be seen that the first filter device 58 arranged in the filter housing 38 is arranged between the first intake chamber 42 and the third sub-chamber 66 and between the second intake chamber 44 and the third sub-chamber 66, so that the coolant and lubricant 22 can be introduced from the third sub-chamber 66 into the intake chambers 42 and 44 via the first filter device 58. This means that in the flow direction of the coolant and lubricant 22 flowing from the inlet opening 46 to and into the intake chambers 42 and 44, the first filter device 58 is arranged downstream of the inlet opening 46 and downstream of the third sub-chamber 66 and upstream of the intake chambers 42 and 44. In this case, the third sub-chamber 66 is arranged in the installation position of the cooling and lubricating device 12 in the vertical direction of the motor vehicle below at least the respective sub-regions T of the intake chambers 42 and 44. In Fig. 1 and Fig. 2, the vehicle vertical direction is illustrated by a double arrow 81.

[0035] Furthermore, Fig. 1 and Fig. 2 that the receiving chamber 40 has a further subchamber 70 common to the intake chambers 42 and 44, which thus forms a further part of the receiving chamber 40. The further subchamber 70 is also referred to as a fourth subchamber and is thus a fourth part of the receiving chamber 40. The filter unit 10 has a second filter device 72 arranged in the filter housing 38, in addition to the first filter device 58, which, in the installed position of the cooling and lubricating device 12, is spaced apart from the first filter device 58 in the vertical direction of the vehicle. The second filter device 72 is arranged between the first intake chamber 42 and the further subchamber 70 and between the second intake chamber 44 and the further subchamber 70, so that the coolant and lubricant 22 can be introduced from the further subchamber 70 into the intake chambers 42 and 44 via the second filter device 72. Fig. 1, Fig. 2, Fig. 4 and Fig. 5 that the filter housing 38 has a first return connection 74, which is provided in addition to the suction connections 50 and 52 and is associated with the electric machine 16 and opens, in particular directly, into the further sub-chamber 70. Furthermore, the filter housing 38 has a second return connection 76, which is provided in addition to the suction connections 50 and 52 and in addition to the return connection 74, which is associated with the electric machine 18 and opens, in particular directly, into the further sub-chamber 70. The return connections 74 and 76 are also referred to as connection pieces. Via the return connection 74, as in Fig. 4 is illustrated by an arrow 78, the coolant and lubricant 22 flowing away from or out of the electric machine 16, after it has lubricated and / or cooled the electric machine 16 or at least a partial area of ​​the electric machine 16, is introduced into the partial space 70 and thus into the receiving space 40. For example, the partial area of ​​the electric machine 16 comprises at least the stator of the electric machine 16. Via the return connection 76, as in Fig. 4 is illustrated by an arrow 80, the coolant and lubricant 22 flowing away from or out of the electric machine 18, after having cooled and / or lubricated the electric machine 18 or at least a partial region of the electric machine 18, are guided into the partial space 70 and thus into the receiving space 40. For example, the partial region of the electric machine 18 comprises at least the stator of the electric machine 18.

[0036] In order to be able to realize, for example, a particularly advantageous cooling and lubrication of the electric drive device 10, the first branch 32 is, with the exception of at least or exactly one, for example, Fig. 5 recognizable venting point S for venting the circuit 24, in particular the sub-chamber 70, is designed as a closed circuit, which, with the exception of at least or exactly one venting point S and otherwise completely closed, has a return 79 ( Fig. 5), by means of which the coolant and lubricant 22 can be guided to and into the suction chambers 42 and 44, from which the coolant and lubricant 22 can be sucked in by means of the pumping device 30. In this case, the return line 79 has, in particular for each electrical machine 16, 18, a return line, in particular a completely closed one, running from the respective electrical machine 16, 18, in particular from the respective stator of the respective electrical machine 16, 18, to the respective return connection 74, 76, which is fluidically connected to the further sub-chamber 70 by means of the respective return connection 74, 76.In other words, the return 79 has a first return line assigned to the electric machine 16 and the return connection 74, which first return line runs, in particular completely and closed, from the electric machine 16, in particular from the stator of the electric machine 16, to the return connection 74, so that the first return line is fluidically connected to the further sub-chamber 70 by means of the return connection 74. A second return line is assigned to the electric machine 18 and the return connection 76, which second return line runs, in particular completely and closed, from the electric machine 18, in particular from the stator of the electric machine 18, to the return connection 76 and is fluidically connected to the further sub-chamber 70 by means of the return connection 76. The first return line is made, for example, of . Fig. 5 and labeled 83.

[0037] This means that the respective return line is fluidically connected both to the respective return connection 74, 76 to which the respective return line is assigned, and, in particular via the respective assigned return connection 74, 76, to the further sub-chamber 70. In Fig. 4, the arrow 78 illustrates a first flow of the coolant and lubricant 22, also referred to as the first partial flow, wherein the first partial flow flows through the first return line and through the return connection 74 and thus flows into the further partial chamber 70 via the return connection 74, in particular bypassing the sump 26. Accordingly, in Fig. 4 an arrow 80 indicates a second flow of the coolant and lubricant 22, also referred to as a second partial flow, wherein the second partial flow flows through the second return line and through the return connection 76 and thus flows into the further partial chamber 70 via the return connection 76, in particular bypassing the sump 26.

[0038] As in Fig. 1 and Fig. 2 by arrows 82, the first partial flow or the second partial flow from the further partial space 70 can flow through the second filter device 72 and thus flow from the further partial space 70 into the intake spaces 42 and 44. From Fig. 1 and Fig. 2 also shows that the respective return connection 74, 76 has a respective projection U, also referred to as the respective connection projection, and thereby protrudes a distance, for example five to ten millimeters, into the further subchamber 70. Furthermore, it can be seen that the further subchamber 70 is arranged above the intake chambers 42 and 44 in the vertical direction of the vehicle when the cooling and lubricating device 12 is installed. Furthermore, the second filter device 72 is arranged above the first filter device 58 in the vertical direction of the vehicle when the cooling and lubricating device 12 is installed. In particular, the return line 79 has the venting point S as the only venting point. It is conceivable that the venting point S has at least or exactly one vent opening 84 for venting the further subchamber 70 and thus for venting the circuit 24.Furthermore, it is conceivable that the venting point S has at least or exactly two venting openings 84, in particular spaced apart from one another, by means of which the partial chamber 70 and, via this, the circuit 24 can be vented. It can be seen that the venting opening 84 is arranged above the partial chamber 70 in the vertical direction of the vehicle when the cooling and lubricating device 12 is installed. The venting opening 84 is a through-opening which penetrates the filter housing 38, in particular completely. Furthermore, the filter unit 10 has exactly four chambers, namely the first intake chamber 42, the second intake chamber 44, the third partial chamber 66 and the further partial chamber 70. Particularly well shown in . Fig. 5 it can be seen that the inlet opening 46, also referred to as the insertion opening, is arranged in the vertical direction of the vehicle when the cooling and lubricating device 12 is installed and thus geodetically below the fill level 36 of the coolant and lubricant 22. For example, the venting point S and thus the venting opening 84, which is designed here as a through-opening, are also arranged in the vertical direction of the vehicle when the cooling and lubricating device 12 is installed and thus geodetically below the fill level 36 of the coolant and lubricant 22. The respective return line has, for example, in particular precisely, a respective inlet opening through which the coolant and lubricant 22 flowing out of the respective electrical machine 16, 18 can flow, which in Fig.not shown outlet opening is at least indirectly fluidically connected. In addition, for example, the respective return line has an outlet opening through which the fluid flowing through the respective return line can flow, via which the respective return line is fluidically connected to the respective associated return connection 74, 76, so that the respective return line is fluidically connected to the further sub-chamber 70 via its respective outlet opening and via the respective associated return connection 74, 76. Preferably, the respective outlet opening of the respective return line is arranged in the vertical direction of the vehicle in the installed position of the cooling and lubricating device 12 and thus geodetically below the fill level 36 of the fluid (coolant and lubricant 22).Thus, by means of the return line 79, the fluid (coolant and lubricant 22) from the respective electrical machine 16, 18, in particular from the respective stator of the respective electrical machine 16, 18, can be returned to the sump 26, also referred to as a tank, below the fluid fill level 36 and below its surface. The respective return line, which is completely closed at least from the respective associated electrical machine 16, 18 up to the respective associated return connection 74, 76 and is also referred to as a return line, can receive and channel the coolant and lubricant 22 after it has absorbed heat from the respective electrical machine 16, 18.This prevents excessive foaming and foaming of the coolant and lubricant 22, in particular by ensuring that the coolant and lubricant 22 does not come into contact with air on its way from the respective electrical machine 16, 18 to and into the sump 26. This can be achieved, in particular, by closing the respective return line from the respective electrical machine 16, 18 to the respective associated return connection 74, 76, in particular completely. Furthermore, this allows the precise quantity of the coolant and lubricant 22 in the circuit 24 to be known, so that no quantity of the coolant and lubricant 22 needs to be kept in reserve due to uncertain return times.Heat absorbed by the coolant and lubricant 22 and, for example, provided or originating from the respective electrical machine 16, 18 can, for example, be fed directly back into the sump 26 and can, for example, be made available to the cooling device 28 upon renewed intake. The cooling device 28 is designed, for example, as a heat exchanger, via which the heat contained in the coolant and lubricant 22 can, for example, be transferred to a further medium, in particular designed as a further fluid. This allows the medium to be heated. By means of the heated medium, for example, the interior of the motor vehicle and / or at least one further component can be heated. The respective return line, designed, for example, as a pipe or return pipe, is made, for example, of plastic and can thus be manufactured cost-effectively.Overall, it can be seen that through the at least substantially closed return line 79, at least the first partial flow and the second partial flow are directed to the filter unit 10 and are thereby introduced directly, i.e., bypassing the sump 26, into the receiving chamber 40 and thereby into the further partial chamber 70, whereby excessive circulation of a quantity of the coolant and lubricant 22 passing through and thus bypassing the sump 26 can be avoided. The residence time of the coolant and lubricant 22 in the sump 26 increases compared to conventional solutions, so that the coolant and lubricant 22 received in the sump 26 can advantageously outgas. Thus, an excessive gas content in the coolant and lubricant 22 can be avoided, which has a positive effect on the cooling and lubricating properties of the coolant and lubricant 22.

[0039] For example, Fig. 5, an arrow 86 indicates a third flow of the coolant and lubricant 22, also referred to as a third partial flow, wherein the third partial flow of the coolant and lubricant 22 flows away from or away from the transmission 20, in particular after the coolant and lubricant 22, thus the third partial flow, has cooled and / or lubricated the transmission 20. It can be seen that the transmission 20 is assigned, for example, a second return 88, by means of which the coolant and lubricant 22 can be discharged from the transmission 20 and, in particular bypassing the receiving space 40, introduced into the sump 26.This means that the third partial flow does not flow through the receiving chamber 40 on its way from the transmission 20 through the return 88 and to and into the sump 26, but only after the third partial flow has been discharged from the transmission 20 by means of the return 88 and introduced into the sump 26, can flow through the inlet opening 46 and thus flow into the receiving chamber 40 via the inlet opening 46.

[0040] Fig. 7 shows the filter unit 10 in a schematic plan view, and Fig. Figure 8 shows the filter unit 10 in a schematic front view. The filter unit 10 is in Fig. 9 in a schematic perspective view. Fig. 10 shows the filter unit 10 in a further schematic perspective view, particularly from below. For example, the filter housing 38 has a first housing part 90 and a second housing part 92, wherein the housing parts 90 and 92 are formed separately from one another and connected to one another, for example. In particular, the housing part 90 is, for example, an upper shell, and the housing part 92 is, for example, a lower shell of the filter housing 38.

[0041] Looks particularly good Fig. 11 and Fig. 12 shows the housing part 92, the intake chambers 42 and 44, the suction connections 50 and 52, the inlet opening 46 and the third sub-chamber 66. It can be seen that the coolant and lubricant 22 from the sump 26 flows through the inlet opening 46 and thus, in the installed position of the cooling and lubricating device 12, initially flows upwards in the vertical direction of the vehicle and can thereby flow into the third sub-chamber 66. From the third subchamber 66, the fluid (coolant and lubricant 22) can initially flow further upwards in the vertical direction of the vehicle and thereby flow through the first filter device 58 and subsequently flow into the respective subregion T of the respective intake chamber 42, 44, wherein the respective subregion T of the respective intake chamber 42 and 44 is also referred to as the respective first subregion and is arranged in the installed position of the cooling and lubricating device 12 in the vertical direction of the vehicle above the third subchamber 66. A respective, in Fig. 11, the second sub-area of ​​the respective intake chamber 42, 44, designated T2, is arranged in the installation position of the cooling and lubricating device 12 in the vertical direction of the vehicle below the respective first sub-area T of the respective intake chamber 42, 44 and thus, for example, below the first filter device 58, in particular such that the respective second sub-area T2 of the respective intake chamber 42, 44 is arranged at the same height as the third sub-chamber 66 in the installation position of the cooling and lubricating device 12 viewed in the vertical direction of the vehicle.Thus, the coolant and lubricant 22 which initially flowed into the respective first sub-area T of the respective intake chamber 42, 44, after it has flowed into the respective first sub-area T of the respective intake chamber 42, 44, can flow downwards in the vertical direction of the vehicle in the installed position of the cooling and lubricating device 12 and thus flow from the respective first sub-area T of the respective intake chamber 42, 44 into the respective second sub-area T2 of the respective intake chamber 42, 44. Fig. 11 that the respective suction connection 50, 52 opens into the respective associated intake chamber 42, 44, in particular directly, so that the fluid flowing into the respective second sub-area T2 can flow from the respective second sub-area T2 into the respective suction connection 50, 52 and subsequently flow through the respective suction connection 50, 52. The coolant and lubricant 22 introduced into the further sub-chamber 70 via the respective return connection 74, 76 can flow downwards from the further sub-chamber 70 in the installed position of the cooling and lubricating device 12 in the vertical direction of the vehicle and in the process flow through the second filter device 72 and thus flow into the respective intake chamber 42, 44, in particular initially into the respective first sub-area T of the respective intake chamber 42, 44. From there, the fluid can flow further downwards in the vertical direction of the vehicle and thus into the respective second sub-area T2.The suction spaces 42 and 44 are also referred to as suction chambers, and the suction connections 50 and 52 are also referred to as pump connections. The hydraulic decoupling of the suction chambers and the pump connections is achieved in this case by means of the separating web. The fluid first enters the third sub-space 66, also referred to as the inlet chamber, from where it can reach both suction chambers via the filter device 58, which is designed, for example, as a filter fleece or comprises a filter fleece. If, for example, the pump 54 is operated while the pump 56 is not operated and is thus deactivated, the fluid is pumped by means of the pump 54, while pumping of the fluid by means of the pump 56 is discontinued. Thus, the fluid is pumped through the first branch 32, also referred to as the first path, while the fluid is not pumped through the second branch 34, also referred to as the second path.Thus, the second path is inactive. Suctioning of the at least temporarily inactive second path is hydraulically decoupled by the division into the two intake chambers, since in this case the fluid is counteracted by a pressure loss of the two filter devices 58 and 72, which are designed, for example, as nonwoven layers or comprise nonwoven layers. In contrast, in the active, first path, only one filter device, namely the filter device 58, is to flow through. For example, in the circuit 24, also referred to as the overall circuit, a respective stator cooling of the respective stator of the respective electrical machine 16, 18, designed, for example, as an axial flux machine, is provided, as previously described, in a closed manner.For this purpose, as previously described, a closed channel is provided from the respective electric machine 16, 18 or from the respective stator directly to the filter unit 10, which is designed, for example, as an oil filter module, in particular in the form of the described return line 79. By directly returning the fluid to the filter unit 10, excessive turbulence of the fluid in the sump 26 due to a relatively large volume flow of the fluid can be prevented. Only the amount of fluid that returns to the sump 26 via another route, in particular via the return line 88, needs to be sucked in through the inlet opening 46 of the filter unit 10.Since, for example, only this third partial flow of the fluid reaches the free sump 26, bypassing the receiving chamber 40, the circulation rate there decreases, and the fluid can outgas better due to the longer residence time. Any gas entering the receiving chamber 40 with the closed, recirculated first or second partial flow separates at least partially within the further, upper partial chamber 70 and can exit the partial chamber 70 via the at least one or precisely one vent opening 84. This can prevent an excessive gas content in the coolant and lubricant 22.

[0042] In Fig. 12, the housing part 92 is shown in a further, sectional perspective view, wherein the suction connections 50 and 52 and the respective associated or assigned suction chambers 42 and 44 are particularly clearly visible.

[0043] Looks particularly good Fig. 13 shows the first filter device 58. In Fig. 14 the second filter device 72 is particularly clearly visible. Furthermore, Fig. 15 to 18 show the filter unit 10 and the receiving space 40 with the filter devices 58 and 72 arranged therein. List of reference symbols 10 filter unit 12 Cooling and lubrication device 14 electric drive device 16 electric machine 18 electric machine 20 gearboxes 22 Coolants and lubricants 24 cycle 26 Swamp 28 Cooling device 30 Pumping device 32 first branch 34 second branch 36 Fill level 38 filter housings 40 recording room 42 first intake chamber 44 second intake chamber 46 Entrance opening 48 Arrow 50 first suction connection 52 second suction connection 54 first pump 56 second pump 58 first filter device 60 partition wall 62 Arrow 64 Arrow 66 third subspace 68 Floor 70 additional sub-areas 72 second filter device 74 first return connection 76 second return connection 78 Arrow 79 Repatriation 80 Arrow 81 Double arrow 82 Arrow 83 Return line 84 Ventilation opening 86 Arrow 88 Repatriation 90 Housing part 92 Housing part F1 filter area F2 filter area S venting point T first sub-area T2 second section U Overhang

Claims

[1] Cooling and lubricating device (12) for an electric drive device (14) of a motor vehicle, with a filter unit (10) which has: - a filter housing (38), with: ◯ a receiving space (40) designed to at least temporarily receive a coolant and lubricant (22) for cooling and lubricating the drive device (14), which has a first suction space (42) as the first subspace of the receiving space (40) and a second suction space (44) as the second subspace of the receiving space (40); ◯ an inlet opening (46) through which the cooling and lubricating agent (22) can be introduced from a sump (26) into the receiving space (40) and fed to the suction spaces (42, 44); ◯ a first suction connection (50), via which the cooling and lubricating agent (22) can be sucked out of the first suction chamber (42) by means of a first pump (54); and ◯ a second suction connection (52), via which the cooling and lubricating agent (22) can be sucked out of the second suction chamber (44) by means of a second pump (56); and - at least one filter device (58) through which the coolant and lubricant (22) can flow and which is arranged in the filter housing (38), via which filter device the coolant and lubricant (22) introduced into the receiving space (40) via the inlet opening (46) can be fed from the sump (26) to the suction spaces (42, 44), the first suction space (42) and the second suction space (44) being hydraulically separated from one another; characterized byin that the receiving space (40) has a further sub-space (70) common to the intake spaces (42, 44), wherein a second filter device (72) is arranged in the filter housing (38), which is arranged between the first intake space (42) and the further sub-space (70) and between the second intake space (44) and the further sub-space (70), so that the cooling and lubricating agent (22) can be introduced from the further sub-space (70) into the intake spaces (42, 44) via the second filter device (72). [2] Cooling and lubricating device (12) according to claim 1, characterized by that the filter unit (10) has a partition wall (60) arranged in the receiving space (40), by means of which the suction spaces (42, 44) are hydraulically separated from one another. [3] Cooling and lubricating device (12) according to claim 1 or 2, characterized byin that the receiving space (40) has a third sub-space (66) common to the intake spaces (42, 44), wherein the inlet opening (46) opens into the third sub-space (66), and wherein the filter device (58) arranged in the filter housing (38) is arranged between the first intake space (42) and the third sub-space (66) and between the second intake space (44) and the third sub-space (66), so that the coolant and lubricant (22) can be introduced from the third sub-space (66) into the intake spaces (42, 44) via the filter device (58). [4] Cooling and lubricating device (12) according to claim 3, characterized by that the third partial chamber (66) is arranged in the installed position of the cooling and lubricating device (12) in the vehicle vertical direction (81) below at least respective partial regions (T) of the intake chambers (42, 44). [5] Cooling and lubricating device (12) according to claim 3 or 4, characterized bythat the filter unit (10) has exactly four chambers, namely the first suction chamber (42), the second suction chamber (44), the third sub-chamber (66) and the further sub-chamber (70). [6] Cooling and lubricating device (12) according to one of the preceding claims, characterized by that the filter housing (38) has at least one return connection (74, 76) provided in addition to the suction connections (50, 52) and opening into the further sub-chamber (70), via which the cooling and lubricating agent (22) can be introduced into the further sub-chamber (70) after cooling and lubricating at least a partial area of the drive device (14). [7] Cooling and lubricating device (12) according to one of the preceding claims, characterized by that the further sub-chamber (70) is arranged above the intake chambers (42, 44) in the installation position of the cooling and lubricating device (12) in the vehicle vertical direction (81). [8] Cooling and lubricating device (12) according to one of the preceding claims, characterized by that in the installed position of the cooling and lubricating device (12), the second filter device (72) is arranged above the first filter device (58) in the vehicle vertical direction (81). [9] Cooling and lubricating device (12) according to one of the preceding claims, characterized by that the further sub-space (70) is designed as a closed space with the exception of at least or exactly one vent opening (84) for venting the further sub-space (70).

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