Oil module, system including oil module, and oil module body

Abstract

To provide an improved oil module characterized by a more variable mounting possibility and / or a reduced installation space requirement.SOLUTION: An oil module 1, or in particular, a gear oil module 7, includes: a conveying device 8 for conveying an oil; and a heat exchanger 11 for controlling a temperature of the oil. The oil module has an inlet opening portion 17 and an outlet opening 18 at its front surface 15, and includes a main body 13 having related openings 19, 22, 23 for the conveying device and the heat exchanger on a back surface 16 separated from and opposed to the front surface. The openings are fluidically connected to each other in the main body. Further a system 2 having the oil module and the motor 4 is provided. Furthermore, the main body for the oil module is provided.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an oil module, in particular a gear oil module for use in an electric motor and comprising a conveying device and a heat exchanger. The invention also relates to a system having a motor, in particular an electric motor, and to such an oil module. The invention also relates to a body for such an oil module. [Background technology]

[0002] Many applications require an oil supply, for example for lubrication and / or cooling, during operation. Such applications include, for example, motors, especially electric motors, whose gears are supplied with oil. To supply the oil, a conveying device, such as an oil pump, must be provided, which conveys the oil along a flow path during operation. Typically, the conveying device is also designed to temperature-control, especially cool, the oil when necessary. For this purpose, a heat exchanger through which the oil flows is typically used for temperature control, especially cooling. In principle, the conveying device and the heat exchanger can each be separately mounted on the associated application, especially the motor. However, this requires separate connections on the motor in each case. This results in a more complex assembly, which in turn requires the manufacture of a system including the motor, conveying device, and heat exchanger.

[0003] It is therefore conceivable to combine the oil supply components, i.e. the conveying device and the heat exchanger, in a module that is mounted on and fluidly connected to the relevant application, which requires fewer assembly steps during assembly of the module and also allows the module to be prefabricated.

[0004] Such a module, also referred to below as an oil module, comprises a collection space for oil, usually known as an oil pan. The oil pan serves to collect oil generated during operation and, if necessary, to resupply it to the flow path. This requires that the oil pan, in the installed state, forms the lowest point in the vertical direction. As a result, both the required installation space and the possible mounting options for the oil module in the associated application, in particular in the motor, are reduced. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention therefore aims to describe improved or at least alternative embodiments of the oil modules of the above-mentioned type, motors and systems comprising such oil modules, as well as bodies for such oil modules, which are characterized by more flexible mounting possibilities and / or reduced installation space requirements. [Means for solving the problem]

[0006] According to the invention, this object is solved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0007] The present invention is based on the general idea of ​​providing a body for an oil module, which has, on a front side thereof, provided for mounting to an associated application, in particular a motor, openings for fluid connection to the application, and on a rear side thereof facing away from the front side, openings for fluid connection to components of the oil module, the openings being at least partially fluidly interconnected within the body so as to provide fluid connections between the application and the components as well as for mounting to the application and the components. In this way, a compact and simple design of the oil module is obtained, and in addition, external fluid connections are not required, or at least the number of such connections is substantially reduced. The need to mount the oil module in the associated application in a predetermined orientation is simultaneously created through the elimination of a so-called oil pan. As a result, the manufacture of the oil module is simplified, and the mounting of the oil module in the associated application is also simplified, along with an increased variety of mounting possibilities.

[0008] According to the concept of the present invention, the oil module includes, in addition to a main body, a conveying device and a heat exchanger. The conveying device, which may be designed, for example, as an oil pump, serves the purpose of conveying oil during operation. This means that the conveying device conveys oil along a flow path during operation. The heat exchanger serves the purpose of temperature control, particularly cooling, of the oil. For this purpose, a flow path passes through the heat exchanger to temperature control the oil. The main body has a front surface and a rear surface facing away from the front surface. The front surface is formed with an inlet opening for oil to enter the main body and an outlet opening for oil to exit the main body. Thus, the oil module can be fluidly connected to a related application, for example, a motor, on the same side. The rear surface of the main body is provided with at least one pump opening for the conveying device. Here, the at least one pump opening of the main body is fluidly connected to the inlet opening. Furthermore, two cooler openings for the heat exchanger (hereinafter referred to as a first cooler opening and a second cooler opening) are formed on the rear surface away from the at least one pump opening. The first cooler opening of the body is fluidly connected with at least one of the at least one pump openings, advantageously with one of the at least one pump openings. In comparison, the second cooler opening of the body is fluidly connected with the outlet opening. The conveying device and the heat exchanger are each arranged on the rear side of the body. The conveying device is fluidly connected with the at least one pump opening such that a flow path passes between the inlet opening and the conveying device. The heat exchanger is fluidly connected with the cooler openings such that a flow path passes through the heat exchanger between the cooler openings and between the second cooler opening and the outlet opening.

[0009] In fact, the body forms the connection base of the oil module for connecting it to the associated application, in particular to a motor, for the purposes of which the latter will be referred to hereinafter, where it should be understood that other applications are also included.

[0010] In fact, the body is designed to be continuous and integral, which means that the body preferably does not contain any components separate from one another.

[0011] In a preferred embodiment, the body can be designed to be elongated, in particular as a plate, so that it can be formed in a stepped shape. This simplifies the installation of the oil module on the motor and further reduces the installation space. The plate-like design of the body also provides that the body is at most half its size in the direction of distance from the rear to the front, and transversely to this direction. Preferably, the body is at most one-fourth, in particular one-eighth, its size in the direction of distance from the rear to the front, transversely to this direction.

[0012] In practice, the cooler openings of the body are fluidly isolated from one another and fluidly connected to one another via the heat exchanger, meaning that the cooler openings provide a flow path through the heat exchanger, i.e., the heat exchanger fluidly interconnects the cooler openings.

[0013] In a preferred embodiment, the transport device and / or the heat exchanger are attached to the body, which is particularly preferred if the transport device and the heat exchanger are fastened to the rear side of the body.

[0014] The inlet and outlet openings are advantageously spaced apart from one another, which allows in particular advantageous fluid conduction in both the oil module and the motor.

[0015] In an advantageous further development of the solution according to the invention, a further opening fluidly connected with at least one of the aforementioned openings in the body is provided for accommodating components of the oil module in addition to the conveying device and the heat exchanger. This means that the body comprises at least one component opening spaced apart from the front face and away from the at least one pump opening and the cooler opening. This component opening is fluidly connected in the body with at least one of the cooler openings and / or at least one of the at least one pump opening. Here, the further component of the oil module spaced apart from the conveying device and the heat exchanger is fluidly connected with at least one associated or at least one component opening and is arranged spaced apart from the front face. Particularly preferably, the further component is attached to the body.

[0016] The additional component is any element that aids in the operation, control, and / or regulation of the operation of the oil module or the motor. In particular, each additional component may be an oil filter for filtering oil or a sensor device for determining a state variable, such as the temperature of the oil.

[0017] It is contemplated that at least one of the at least one component opening is formed in a rear surface of the body.

[0018] Embodiments are also contemplated in which at least one of the at least one component opening is arranged longitudinally with respect to the front and rear surfaces, meaning that the body includes an exterior surface connecting the front surface to the rear surface, and at least one of the at least one component opening is formed in one of the exterior surfaces.

[0019] In principle, the flow path between the conveying device and the heat exchanger can run in any orientation, which means that the conveying device can be arranged upstream or downstream of the heat exchanger.

[0020] Advantageously, the conveying device is arranged upstream of the heat exchanger. This means that the flow path runs from the inlet opening to the conveying device via at least one pump opening, from the at least one pump opening to the first cooler opening, and then from the second cooler opening to the outlet opening via the heat exchanger. This means that the heat exchanger is arranged on the pressure side of the conveying device. In this way, improved oil temperature control, in particular improved oil cooling, is possible, with increased efficiency.

[0021] In principle, the body can be formed as a flat, shallow plate in which corresponding fluid conduits are formed to connect the fluidly interconnected openings.

[0022] It is also conceivable to form a body with a base plate and components with different orientations relative to the base plate. Advantageously, the base plate serves as the fluid connection and mounting of the heat exchanger, which means that the base plate comprises the cooler openings.

[0023] It is conceivable that the main body comprises an auxiliary plate, which serves to fluidly connect with the conveying device and therefore comprises at least one pump opening. Preferably, the auxiliary plate also comprises an inlet opening. This simplifies the design of the main body and shortens the fluid connections of the main body.

[0024] Preferably, the auxiliary plate is offset toward the front side relative to the base plate in a rear-to-front distance direction, whereby the front and rear faces of the auxiliary plate are offset from the front and rear faces of the base plate, i.e., the front and rear faces of the auxiliary plate are offset toward the motor in the associated system.

[0025] In a possible embodiment, the body comprises an arm protruding from the base plate laterally or obliquely relative to the distance from the rear to the front. The arm serves as a fluid connection between the oil module and the motor. The outlet opening is thereby at least partially formed on the arm. This allows, in particular, the outlet opening to be made larger, making it possible to establish an improved fluid connection between the oil module and the motor.

[0026] The oil module can in particular be configured as a gear oil module, which serves to supply gears, in particular motors, for example electric motors, with oil.

[0027] It should be understood that the body itself is also within the scope of the present invention.

[0028] Advantageously, the oil module is part of a system further comprising a motor, it being understood that such a system is also part of the scope of the present invention.

[0029] The oil module is advantageously attached to the motor, in particular fixed, so that in practice the front face of the body faces the motor and the back face faces away from the motor. Advantageously, the front face of the body is supported on the motor. The motor in practice has an oil inlet for discharging oil into the motor and an oil outlet for discharging oil out of the motor, each facing the front face. Here, the oil outlet is fluidly connected to the inlet opening of the oil module, and the oil inlet is fluidly connected to the outlet opening of the oil module. As a result, a flow path passes through the motor. In particular, the gears of the motor are supplied with oil in this way. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is a schematic diagram of a system having a motor and an oil module. [Figure 2] FIG. 2 is a side view of the mechanism. [Figure 3]FIG. 3 is a cross-sectional view of the system. [Figure 4] FIG. 4 is a perspective view of the oil module as seen from the rear side of the oil module. [Figure 5] FIG. 5 is a perspective view of the main body of the oil module as seen from the rear side. [Figure 6] FIG. 6 is a perspective view of the oil module as seen from the front side. [Figure 7] FIG. 7 is a front view of the front side of the oil module, showing the main body in a see-through manner. DETAILED DESCRIPTION OF THE INVENTION

[0031] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the associated drawing description by the drawings.

[0032] It is to be understood that the features mentioned above and described below may not only be used in the respective combinations described, but may also be used in other combinations or alone without departing from the scope of the present invention.

[0033] Preferred exemplary embodiments of the present invention are illustrated in the drawings and will be explained in more detail in the following description, where like reference numbers refer to the same, similar, or functionally identical components.

[0034] For example, an oil module 1 such as that shown in FIGS. 1-7 may be used in a system 2 shown in FIGS. 1-3 to supply oil to an associated application 3. In the illustrated system 2, the application 3 is a motor 4, particularly an electric motor 5. As is apparent from FIG. 1, the motor 4 includes a gear 6. Here, as shown in FIG. 1, the oil module 1 may be employed to supply oil to the gear 6, and may therefore be a gear oil module 7. As shown in FIG. 1, the motor 4, particularly the electric motor 5, includes a shaft 14 that can draw torque to the motor 4.

[0035] The oil module 1 comprises a conveying device 8 which conveys oil along a flow path 9 (see in particular FIG. 1 ). The conveying device 8 is in particular designed as an oil pump 10. For temperature control, in particular for cooling the oil, the oil module 1 further comprises a heat exchanger 11, in particular an oil cooler 12. For temperature control, in particular for cooling the oil, the flow path 9 passes through the heat exchanger 11. The heat exchanger 11 shown in the figure is separated from the oil flow path 9 and is used for temperature control means, for example a coolant. The coolant flow is indicated in FIG. 1 by dashed lines.

[0036] The oil module 1 further includes a main body 13. The main body 13 is formed in a plate shape and includes a front surface 15 facing the motor 4, and a back surface 16 facing the opposite side from the front surface 15 and therefore facing away from the motor 4. Here, FIG. 4 shows a perspective view of the oil module 1 facing the back surface 16, FIG. 5 shows a perspective view of the main body 13 facing the back surface 16, FIG. 6 shows a perspective view of the oil module 1 facing the front surface 15, and FIG. 7 shows a front view facing the front surface 15 with the main body 13 seen through. The main body 13 further includes an outer surface 29 connecting the front surface 15 to the back surface 16.

[0037] 1 and 6, the body 13 has an inlet opening 17 and an outlet opening 18 spaced apart from the inlet opening 17, each formed in the front surface 15. In the exemplary embodiment shown in FIGS. 2 to 7, the inlet opening 17 is round and the outlet opening 18 is elongated.

[0038] As can be seen particularly from FIGS. 1 and 5 , the body 13 on the rear surface 16 includes at least one pump opening 19, and in the illustrated exemplary embodiment, two pump openings 19 are spaced apart from each other. The pump openings 19 serve as fluid connections with the conveying device 8 disposed on the rear surface 16 and attached to the body 13. Herein, at least one of the at least one pump openings 19 in the body 13 is fluidly connected to the inlet opening 17. In the illustrated exemplary embodiment, the first pump opening 19 a is fluidly connected to the inlet opening 17 by a channel 20 that flows through the body 13. Hereinafter, this channel 20 may be referred to as the pump channel 20. In the illustrated exemplary embodiment, the pump channel 20 extends along the distance direction 21 of the rear surface 16 to the front surface 15. As can be seen particularly from FIGS. 1 and 5 , the body 13 includes two cooler openings 22 and 23, i.e., a first cooler opening 22 and a second cooler opening 23, disposed at a distance from the at least one pump opening 19 on the rear surface 16. The first cooler opening 22 in the illustrated exemplary embodiment is located closer to the pump opening 19 than the second cooler opening 23. As is particularly clear from FIGS. 1 and 3 , the second pump opening 19b in the body 13 is fluidly connected to the first cooler opening 22. For this purpose, a channel 24 extends between the second pump opening 19b and the first cooler opening 22. This channel 24 may hereinafter be referred to as the cooler channel 24. The heat exchanger 11 is fluidly connected to both cooler openings 22, 23 such that the cooler openings 22, 23 are fluidly connected to one another via the heat exchanger 11. In the illustrated exemplary embodiment, the fluid connection between the cooler openings 22, 23 occurs exclusively via the heat exchanger 11. Furthermore, the second cooler opening 23 in the body 13 is fluidly connected to the outlet opening 18, as is particularly clear from FIG. 1 . For this purpose, a channel 25 extends between the second cooler opening 23 and the outlet opening 18. Hereinafter, this channel 25 may be referred to as the exit channel 25.

[0039] Thus, the flow path 9 extends between the inlet opening 17 and the first pump opening 19a via the pump channel 20, between the second pump opening 19b and the first cooler opening 22 via the cooler channel 24, between the first cooler opening 22 and the second cooler opening 23 via the heat exchanger 11, and between the second cooler opening 23 and the outlet opening 18 via the outlet channel 25. In the illustrated embodiment, the conveying device 8 is operated so as to be positioned upstream of the heat exchanger 11. This allows the flow path 9 to be led to the oil module 1 via the inlet opening 17, to the first pump opening 19a via the pump channel 20, and to the conveying device 8 via the first pump opening 19a. The conveying device 8 then discharges the oil via the second pump opening 19b. The flow path 9 is then led from the second pump opening 19b through the cooler channel 24 to the first cooler opening 22, led to the second cooler opening 23 through the heat exchanger 11, and led from the second cooler opening 23 to the outlet opening 18 through the outlet channel 25.

[0040] To fluidly connect the oil module 1 with the motor 4, the motor 4 faces the front face 15 and is provided with an oil inlet 26 and an oil outlet 27 for discharging oil, as can be seen in Figure 1. In the system 2, with the oil module 1 attached to the motor 4, the oil inlet 26 merges with the outlet opening 18 and is fluidly connected thereto, while the oil outlet 27 merges with the inlet opening 17 and is fluidly connected thereto. Thus, oil enters the motor 4 via the outlet opening 18 and the oil inlet 26, and enters the oil module 1 via the oil outlet 27 and the inlet opening 17.

[0041] Thus, an oil module 1 and a system 2 are realized that are configured to save installation space. Furthermore, the oil module 1 can be mounted on the motor 4 in different positions and orientations, for example both vertically and horizontally, in particular because the oil module 1 does not have an oil pan for collecting oil.

[0042] In the illustrated exemplary embodiment, the body 13 comprises at least one further opening 28 spaced apart from the front face 15. Hereinafter, this opening 28 may be referred to as a component opening 28. Therefore, the component opening 28 is spaced apart from the front face 15, and therefore from both the inlet opening 17 and the outlet opening 18. Additionally, the component opening 28 is spaced apart from the at least one pump opening 19 and from the cooler openings 22, 23. In the illustrated exemplary embodiment, only one component opening 28 is provided for illustrative purposes only, and it is formed in one of the outer faces 29. As can be seen in particular from FIGS. 2 to 7 , the component opening 28 in the illustrated exemplary embodiment is fluidly connected to the outside via a receiving channel 30. The receiving channel 30 extends obliquely with respect to the distance direction 21. The component opening 28 constitutes a fluid connection between the conveying device 8 and another component 31 (hereinafter, sometimes referred to as an additional component 31) of the oil module 1 that is separate from the heat exchanger 11. In the illustrated exemplary embodiment, the additional component 31 is a sensor device 32 which is fluidly connected to the flow path 9 via the component opening 28 and which determines a state variable of the oil, in particular the temperature of the oil, during operation.

[0043] As is particularly clear from FIGS. 3 to 7 , the main body 13 of the illustrated embodiment has a base plate 33 having cooler openings 22 and 23. As such, the base plate 33 includes a portion of the rear surface 16. Hereinafter, this portion of the rear surface 16 may be referred to as the rear surface 16a of the base plate 33. The cooler openings 22 and 23 are formed in the rear surface 16a of the base plate 33. Similarly, the base plate 33 includes a portion of the front surface 15 of the main body 13. Hereinafter, this portion of the front surface 15 may be referred to as the front surface 15a of the base plate 33. The main body 13 of the illustrated exemplary embodiment further includes an auxiliary plate 34 connected to the base plate 33 in a stepped manner. The auxiliary plate 34 includes an inlet opening 17 and a pump opening 19. Therefore, the auxiliary plate 34 includes a portion of the rear surface 16 of the main body 13. Hereinafter, this portion of the rear surface 16 may be referred to as the rear surface 16b of the auxiliary plate 34. Hereinafter, the pump opening 19 is formed in the rear surface 16b of the auxiliary plate 34. Furthermore, the auxiliary plate 34 has an inlet opening 17. Therefore, the auxiliary plate 34 includes a part of the front surface 15 of the main body 13. Hereinafter, this part of the front surface 15 may be referred to as the front surface 15b of the auxiliary plate 34. Hereinafter, the ... inlet opening 17 is formed on the front surface 15b of the auxiliary plate 34. As is clear from the figure, the auxiliary plate 34 has been moved toward the base plate 33 in the distance direction 21. This means that the auxiliary plate 34 is positioned offset toward the motor 4 compared to the base plate 33. As a result, the front surface 15a and the back surface 16a of the base plate 33 are offset in the distance direction 21 with respect to the front surface 15b and the back surface 16b of the auxiliary plate 34.

[0044] 6 and 7, the body 13 further comprises, in the illustrated exemplary embodiment, an arm 35. The arm 35 is spaced apart from the auxiliary plate 34, protrudes from the base plate 33 and at least partially comprises the outlet opening 18.

Claims

1. An oil module (1) configured as a gear oil module (7) for an electric motor (5), a conveying device (8) for conveying oil along a flow path (9) during operation; a heat exchanger (11) through which the flow path (9) passes for controlling the temperature of the oil; a body (13) having a front surface (15) and a back surface (16) facing away from the front surface (15); The front surface (15) is formed with an inlet opening (17) for allowing oil to flow into the body (13) and an outlet opening (18) for allowing oil to flow out of the body (13); The rear surface (16) is formed with at least one pump opening (19), and at least one of the at least one pump opening (19) of the body (13) is fluidly connected to the inlet opening (17); A first cooler opening (22) and a second cooler opening (23) are formed in a portion of the rear surface (16) spaced from the at least one pump opening (19), the first cooler opening (22) of the body (13) is in fluid communication with at least one of the at least one pump opening (19); a second cooler opening (23) of the body (13) in fluid communication with the outlet opening (18); the conveying device (8) is arranged on the back surface (16) and is fluidly connected to the at least one pump opening (19) such that the flow path (9) passes between the inlet opening (17) and the conveying device (8) and between the conveying device (8) and the first cooler opening (22); the heat exchanger (11) is arranged on the rear surface (16) and is fluidly connected to the cooler openings (22, 23) such that the flow path (9) passes between the first cooler opening (22) and the second cooler opening (23) through the heat exchanger (11) and between the second cooler opening (23) and the outlet opening (18); The body (13) comprises a base plate (33) having the cooler openings (22, 23), The body (13) also comprises an auxiliary plate (34) having the inlet opening (17) and at least one of the pump openings (19), the auxiliary plate (34) is offset toward the front surface (15) relative to the base plate (33) in a distance direction (21) from the back surface (16) toward the front surface (15) such that the front surface (15b) and the back surface (16b) of the auxiliary plate (34) are positioned offset relative to the front surface (15a) and the back surface (16a) of the base plate (33).

2. 2. The oil module according to claim 1, the body (13) includes at least one component opening (28) spaced from the front surface (15) and spaced from at least one of the pump opening (19) and the cooler opening (22, 23); the component opening (28) in the body (13) is fluidly connected to at least one of the cooler openings (22, 23) and / or at least one of the at least one pump opening (19); an additional component (31) separate from the conveying device (8) and the heat exchanger (11) is fluidly connected to at least one associated one of the at least one component openings (28) and spaced from the front surface (15).

3. 3. The oil module according to claim 2, The body (13) has an outer surface (29) connecting the front surface (15) and the back surface (16), 10. An oil module comprising: at least one of said at least one component opening (28) formed in one of said outer surfaces (29).

4. 4. The oil module according to claim 2 or 3, At least one of the at least one component opening (28) is located on the back surface ( 16). An oil module characterized in that it is formed in

5. The oil module according to any one of claims 2 to 4, An oil module, characterized in that at least one of said at least one additional component (31) is a sensor device (32) for determining a state variable of the oil during operation.

6. The oil module according to any one of claims 1 to 5, The oil module is characterized in that the conveying device (8) is arranged along the flow path (9) upstream of the heat exchanger (11).

7. 2. The oil module according to claim 1, The oil module is characterized in that the main body (13) has an arm (35) protruding from the base plate (33) in a direction perpendicular or oblique to the distance direction (21) from the front back surface (16) toward the front surface (15), and the outlet opening (18) is at least partially formed in the arm (15).

8. A system (2) comprising an electric motor (5) with a gear (6) and an oil module (1) according to any one of claims 1 to 7 attached to the electric motor (5), The front surface (15) of the body (13) faces the electric motor (5), The electric motor (5) has an oil inlet (26) through which oil flows into the electric motor (5). and an oil outlet portion (27) for discharging oil from the electric motor (5), the oil inlet portion (26) and the oil outlet portion (27) facing the front surface (15), the oil outlet (27) is fluidly connected to the inlet opening (17) and the oil inlet (26) is fluidly connected to the outlet opening (18) of the oil module (1) so that the flow path (9) passes through the electric motor (5).

9. A body (13) of an oil module (1) configured as a gear oil module (7) for an electric motor (5), a base plate (33) including a front surface (15a) and a back surface (16a) facing away from said front surface (15a); an auxiliary plate (34) offset relative to the base plate (33); a front surface (15b) and a rear surface (16b) of the auxiliary plate (34) are offset toward the front surface (15a) with respect to the base plate (33) in a distance direction (21) from the rear surface (16a) toward the front surface (15a) so that the front surface (15b) and the rear surface (16b) of the auxiliary plate (34) are disposed offset with respect to the front surface (15a) and the rear surface (16a) of the base plate (33); The front surface (15b) of the auxiliary plate (34) has an inlet opening (17) for allowing oil to flow into the body (13); The front surface (15a) of the base plate (33) has an outlet opening (18) for oil to flow out; the rear surface (16b) of the auxiliary plate (34) has at least one pump opening (19) in fluid communication with the inlet opening (17); The rear surface (16a) of the base plate (33) has a first cooler opening (22) and a second cooler opening (23) formed in a portion spaced apart from at least one pump opening (19), the first cooler opening (22) is in fluid communication with at least one of the at least one pump opening (19); the second cooler opening (23) is fluidly connected to the outlet opening (18); a conveying device (8) for conveying oil along a flow path (9) during operation is arranged on the back surface (16b) of the auxiliary plate (34); the conveying device (8) is fluidly connected to at least one of the pump openings (19) such that the flow path (9) passes between the inlet opening (17) and the conveying device (8) and between the conveying device (8) and the first cooler opening (22); a heat exchanger (11) through which the flow path (9) passes for controlling the temperature of the oil is disposed on the back surface (16a) of the base plate (33); The heat exchanger (11) is fluidly connected to the cooler openings (22, 23) such that the flow path (9) passes between the first cooler opening (22) and the second cooler opening (23) via the heat exchanger (11) and between the second cooler opening (23) and the outlet opening (18).

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