drive module for a vehicle

Abstract

Drive module (1) for a vehicle with an electric motor section (32), wherein an electric motor (2) is arranged in the electric motor section (32), wherein the electric motor (2) has a rotor (3) and a stator (4), with a transmission section (36), wherein the transmission section (36) has a sub-transmission (41), wherein a transmission chamber (16) with transmission oil is formed in the transmission section (36) and wherein the sub-transmission (41) is arranged at least sectionally in the transmission chamber (16), with a rotor shaft (6), wherein the rotor shaft (6) is connected to the rotor (3) of the electric motor (2) and wherein the rotor shaft (6) forms an input shaft into the sub-gearbox, wherein the rotor shaft (6) is designed as a hollow shaft, with an oil circuit, wherein the transmission oil is guided from the transmission chamber (16) via the rotor shaft (6) back into the transmission chamber (16) to cool the rotor (3) via the rotor shaft (6), with a cooling arrangement (21) for cooling the electric motor (2) with a cooling fluid, wherein the cooling arrangement (21) has a fluid cooling jacket (24), wherein the fluid cooling jacket (24) surrounds the electric motor (2) to cool the stator (4) with the cooling fluid, characterized by an oil cooling jacket section (28), wherein the oil cooling jacket section (28) is arranged fluidically in the oil circuit between the gearbox chamber (16) and the rotor shaft (6), and wherein the oil cooling jacket section (28) surrounds the fluid cooling jacket (24) to cool the gearbox oil with the cooling fluid.

Description

[0001] The invention relates to a drive module for a vehicle having the features of the preamble of claim 1.

[0002] In hybrid or electric vehicles, the drive torque is provided at least partially, or often entirely, by one or more electric motors. When electric motors provide this drive torque, they generate waste heat which must be dissipated. This cooling can be achieved either through air cooling or through a cooling system.

[0003] The publication DE 10 2015 214 309 A1, which likely represents the closest state of the art, discloses a drive system with an electric motor for a vehicle. The electric motor is cooled via a cooling jacket. In addition, gear oil is used as a second coolant, circulated from an oil sump through the hollow rotor shaft to cool the rotor shaft and thus the rotor of the electric motor.

[0004] US Patent 2009 / 0102298A1 discloses a liquid-cooled enclosure for an electrical device with an outer and an inner surface, the inner surface forming at least a portion of a longitudinally axial enclosure cavity. An end wall is continuously connected to the inner surface and substantially closes off the enclosure cavity at one end. A helical channel is integrated between the outer and inner surfaces along the axis.

[0005] US Patent 2009 / 0127954A1 discloses a motorized drive device in which the rotation of the electric motor's shaft is transmitted via a reduction gear to a differential, with one of the differential's two output shafts located inside the shaft. The device comprises a motor housing and a transmission housing, arranged on either side of a partition and separated by it. The electric motor is housed in the motor housing, and the reduction gear and differential are located in the transmission housing. An oil communication channel in the lower part of the partition connects the floor areas of the electric motor compartment and the transmission compartment. An oil pump on the partition, driven by the shaft, supplies oil to the electric motor, reduction gear, and differential.The oil pump's suction port is connected to the gearbox's oil collection chamber via an oil intake channel provided in the partition wall and a strainer located in the lower part of the gearbox housing. The opening of the oil communication channel on the gearbox side is located inside the gearbox housing in a region axially spaced from the partition wall.

[0006] US Patent 2011 / 0011203A1 discloses an in-wheel motor drive unit comprising a motor section, a reduction gear section, a housing, a wheel hub, and a lubrication system for the reduction gear. The lubrication system includes a lubricating oil track within the motor-side rotating element, a lubricating oil supply channel to the outside of the rotating element, a lubricating oil return channel within the housing, an oil circulation track for returning the lubricating oil from the return channel to the lubricating oil track, and a cooling water track within the housing for cooling the lubricating oil in the oil circulation track. A separating element separates the oil circulation track and the cooling water track at their point of contact.

[0007] DE 10 2016 110 658 A1 discloses a cooling housing with an interior for an electric motor, consisting of a centrally mounted rotor and a surrounding stator with several electrical windings. An inner cooling wall is arranged around the stator, which is in thermally conductive contact with the stator and defines the coolant channels of a first cooling circuit through which coolant flows.

[0008] A further cooling wall separates these channels from those of a second, oil-fired cooling circuit, whose channels are located radially further outwards and are bounded by an outer casing. The two cooling circuits are separate from each other. Coolant lines are connected externally to the second coolant inlet and outlet, leading into the interior at one end of the housing and the other at the other. This additional cooling wall is positioned axially further outwards than the inner cooling wall.

[0009] The object of the present invention is to propose an improved cooling system for an electric motor in a drive module. This object is achieved by a drive module with the features of claim 1. Advantageous or preferred embodiments of the invention will become apparent from the dependent claims, the following description, and the accompanying figures.

[0010] The invention relates to a drive module suitable and / or designed for use in a vehicle. The vehicle is, in particular, a hybrid vehicle or an electric vehicle. The drive module preferably provides a main drive torque for the vehicle. It is at least preferred that the drive module provides at least 50% of the drive torque in at least one operating mode during vehicle operation. The drive module is, in particular, designed as a self-retaining assembly.

[0011] The drive module includes an electric motor that generates the drive torque. An electric motor compartment is formed within the drive module, and the electric motor is located within this compartment. The electric motor comprises a rotor and a stator, and is preferably implemented as an internal rotor motor. The rotor defines a main axis of the drive module. Preferably, the electric motor compartment is dry, and in particular, gear oil-free. The electric motor compartment is formed by a housing section of the drive module.

[0012] The drive module includes a partial transmission, which transmits the drive torque from the electric motor and optionally converts it, in particular by increasing or reducing the gear ratio. The partial transmission can also be designed as a gearbox. In particular, the partial transmission can be single-start, double-start, or multi-start and / or implemented as a transmission stage. The partial transmission preferably includes a planetary gear stage and / or a differential stage. For example, the planetary gear stage and the differential stage are arranged coaxially with the rotor shaft.

[0013] The drive module has a transmission section, within which a transmission chamber is formed. Preferably, the transmission chamber contains an oil atmosphere, in particular a transmission oil atmosphere. The partial transmission is optionally arranged completely or only partially within the transmission chamber. The transmission section is formed by a housing section of the drive module.

[0014] The drive module has a rotor shaft, which is non-rotatably connected to the rotor of the electric motor. The rotor shaft is arranged, in particular, coaxially and / or concentrically with the electric motor and / or the rotor. The rotor shaft forms an input shaft to the gearbox to transmit the drive torque from the electric motor to the gearbox. Preferably, the rotor shaft, with its own axis of rotation, also defines the main axis in the drive module. Preferably, the gearbox section and the electric motor section are arranged coaxially with the main axis. In particular, the gearbox section and the electric motor section are arranged axially offset from each other. For example, a partition is arranged between the gearbox section and the electric motor section. The partition separates the electric motor section, with its gear-oil-free atmosphere, from the gearbox section, with its gear oil atmosphere.

[0015] The rotor shaft is designed as a hollow shaft, allowing gear oil to be transported through it. The rotor shaft can be designed as a hollow shaft along its entire length. Alternatively, the rotor shaft may have one or more hollow sections, thus forming a hollow shaft. In particular, the rotor shaft has at least one axially extending channel.

[0016] The drive module incorporates an oil circuit, whereby the transmission oil is routed from the transmission chamber via the rotor shaft and back into the transmission chamber. In this way, the rotor shaft is circulated with transmission oil, thus actively cooling the rotor shaft and, consequently, the rotor of the electric motor.

[0017] Furthermore, the drive module includes a cooling arrangement for cooling the electric motor with a cooling fluid, the cooling fluid preferably being gear oil-free. In particular, the cooling fluid is implemented as a water mixture, a water-alcohol mixture, or a water-glycol mixture. The cooling arrangement comprises a fluid cooling jacket that surrounds the electric motor. The cooling fluid flows through the fluid cooling jacket. By enclosing the stator, the fluid cooling jacket actively cools the stator and thus the electric motor.

[0018] Thus, the electric motor is cooled from the inside by the oil circuit and from the outside by the cooling arrangement.

[0019] The invention proposes that the drive module includes an oil cooling jacket section, wherein the oil cooling jacket section is fluidly arranged in the oil circuit between the gearbox chamber and the hollow shaft. The gearbox oil preferably flows from the gearbox chamber through the oil cooling jacket section into the rotor shaft. The oil cooling jacket section is structurally arranged such that it encloses the fluid cooling jacket, allowing the cooling fluid from the cooling arrangement to cool the gearbox oil within the oil cooling jacket section. Preferably, the oil cooling jacket section is arranged coaxially and / or concentrically with the fluid cooling jacket.

[0020] One aspect of the invention is that the use of the oil cooling jacket section allows the gear oil to be actively cooled by the cooling arrangement, thereby improving the cooling of the rotor shaft, the rotor, and consequently the electric motor. This improved cooling is achieved through a design modification of the oil circuit and / or the cooling arrangement, making it cost-effective to implement.

[0021] It is preferably provided that, with respect to its axial extent, the oil cooling jacket section extends more than 50% over the axial length of the fluid cooling jacket. In particularly preferred embodiments of the invention, the oil cooling jacket section is even equal to or even larger than the axial width of the cooling jacket in order to further improve cooling.

[0022] In a preferred embodiment of the invention, the fluid cooling jacket has an outer circumferential surface, wherein the oil cooling jacket section has a sleeve with an inner circumferential surface, the transmission oil being guided between the outer circumferential surface and the inner circumferential surface. In this way, surface cooling of the transmission oil is possible. In addition, the thermal resistance between the fluid cooling jacket and the oil cooling jacket section is very low.

[0023] In a preferred embodiment of the invention, flow deflection elements are provided, wherein the flow deflection elements are arranged between the sleeve, in particular the inner circumferential surface, and the fluid cooling jacket, in particular the outer circumferential surface. The flow deflection elements lengthen the flow path for the transmission oil in the oil cooling jacket section, thus improving the cooling of the transmission oil.

[0024] In a preferred embodiment of the invention, the flow deflection elements are designed as webs oriented axially and / or parallel to the main axis. Particularly preferably, first webs extend from an outlet end region of the oil cooling jacket section and second webs from an inlet end region of the oil cooling jacket section, the first and second webs interlocking like a comb to lengthen the flow path.

[0025] In a possible further development, it is proposed that the cooling arrangement include a gearbox cooling section, which is located within the gearbox area. For example, the gearbox cooling section is located, at least partially, on the side of the gearbox compartment and / or gearbox area with respect to the partition wall. In particular, the gearbox cooling section is located in the same axial section as the gearbox compartment and / or gearbox area. This design ensures that the cooling arrangement has a greater effect on the oil circuit, thus cooling the gearbox oil in the gearbox compartment with the cooling fluid. This results in cooled gearbox oil being fed into the oil circuit at the inlet, thereby improving the cooling of the rotor and thus the electric motor.It is advantageous that the cooling system is already in place, so that with minimal design effort it can be adapted to be located in the gearbox area. This allows for a significant improvement in cooling via the oil circuit.

[0026] In a preferred embodiment of the invention, an oil sump is formed in the transmission compartment, wherein the transmission compartment cooling section is arranged in the same section of the drive module as an oil sump section of the sump. The transmission compartment cooling section can thus extend axially over a portion of the oil sump or, in modified embodiments, over the entire oil sump. By arranging the transmission compartment cooling section and the oil sump or oil sump section in the same axial segment, particularly effective cooling of the oil sump, and consequently of the transmission oil, is achieved.

[0027] It is particularly preferred that the transmission chamber cooling section is located, at least partially, in a floor region of the transmission chamber. Since the transmission oil collects in the oil sump, the most effective cooling of the transmission oil is achieved when the transmission chamber cooling section is located in the floor region of the transmission chamber. The transmission chamber cooling section may be limited to the floor region. However, it is also possible for the transmission chamber cooling section to extend into other areas of the transmission chamber. For example, it is possible for the transmission chamber cooling section to be continuous around the main axis.

[0028] In a preferred design, the gearbox cooling section is configured as an axial extension of the fluid cooling jacket. The gearbox cooling section can have the same diameter, particularly the inner diameter, as the fluid cooling jacket. Alternatively, the gearbox cooling section can have a smaller diameter if the structural conditions permit, require, or necessitate this.

[0029] In a preferred design, the gearbox cooling section comprises at least one segment of an annular channel or an entire annular channel, wherein the annular channel extends around the gearbox. The annular channel is particularly preferably arranged coaxially and / or concentrically to the main axis.

[0030] It is preferred that the drive module includes an oil pump, which actively circulates the transmission oil within the oil circuit. In principle, the oil pump can be located outside the transmission compartment. However, since this position requires additional installation space within the drive module, it is preferred to locate the oil pump within the transmission compartment. The oil circuit then flows directly from the transmission compartment to the oil pump, subsequently into the oil cooling jacket section, and then into the rotor shaft and / or hollow shaft.

[0031] In a first possible constructive embodiment of the invention, the oil circuit is routed in such a way that the transition from a static oil circuit section directly into the rotor shaft takes place.

[0032] In one possible implementation, the drive module has a cover, the cover having a channel for the fluidic connection between the oil cooling jacket section and the rotor shaft and / or hollow shaft. In particular, this creates a rotary feedthrough or similar connection between the static oil circuit section and the rotor shaft. Preferably, the cover is designed as a position plate and carries at least one bearing for supporting the rotor shaft.

[0033] In an alternative embodiment of the invention, the drive module has an output shaft, wherein the output shaft is guided coaxially and / or concentrically in the rotor shaft, particularly in the hollow shaft. Preferably, the output shaft transmits a portion of the drive torque from the electric motor. The oil circuit is provided that it is guided from a static oil circuit section first into the output shaft and subsequently into the rotor shaft. For example, a rotary feedthrough can be arranged between the static oil circuit section and the output shaft.

[0034] In a particularly preferred embodiment of the invention, the drive module is designed as an electric axle for a vehicle to supply two driven wheels of an axle, in particular a front or rear axle, with the drive torque. The partial transmission has a differential stage and two output shafts, the differential stage distributing the drive torque to the two output shafts. Preferably, the differential stage is designed as a planetary differential stage. One of the output shafts, in particular the output shaft, is guided coaxially and / or concentrically through the rotor shaft and / or hollow shaft.

[0035] The concept for rotor shaft cooling with actively cooled gear oil preferably involves pumping the gear oil along the outer surface of the housing, coaxially past the fluid channels of the fluid cooling jacket. The gear oil flow is guided, for example, by the housing's finned structure and sealed by a tube acting as a sleeve. At one end, the tube is sealed against the housing or the fluid cooling jacket with an O-ring. At the other end, it is welded to the housing or the fluid cooling jacket for sealing and fixation. After passing through the finned structure, the cooled gear oil enters an oil channel provided in the cover through a bore. The outlet of this oil channel is sealed against both the electric motor's interior (the motor compartment) and the external environment by two seals – one between the cover and rotor shaft, and another between the cover and drive shaft.The gearbox oil thus flows into the rotor shaft, absorbs heat from the rotor and flows back into the gearbox housing.

[0036] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention and the accompanying figures. These show: Fig. 1 a schematic representation of a drive module with the gear arrangement as an embodiment of the invention; Fig. 2 a schematic three-dimensional representation of the fluid cooling jacket of the preceding figure; Fig. 3 A schematic three-dimensional representation of the drive module.

[0037] The Fig. Figure 1 shows a schematic representation of a drive module 1, which is designed as an electric axle. The drive module 1 has an electric motor 2 with a rotor 3 and a stator 4. The electric motor 2 serves to provide drive torque for a vehicle, which is not shown. The electric motor 2 is arranged in a motor compartment 26 in an electric motor section 32 of the drive module 1.

[0038] The drive module 1 has two output shafts 5a, b, which transmit the drive torque to the driven wheels of the vehicle. The output shaft 5a is arranged coaxially and / or concentrically to the electric motor 2. More precisely, the drive module 1 has a rotor shaft 6, which is non-rotatably connected to the rotor 3 and is designed as a hollow shaft. The output shaft 5a is designed as a further shaft and runs coaxially and concentrically to the rotor shaft 6, so that an annular space 7 is formed between the rotor shaft 6 and the output shaft 5a.

[0039] A gear section 8 is fixedly mounted on the rotor shaft 6, forming a sun gear section and / or center gear section in a planetary gear stage 9. The gear section 8 has a circumferential spur gear toothing 10 and meshes in a meshing area 23 with a plurality of planet gears 11, which are rotatably arranged on a planet carrier 12. Thus, the gear section 8, the planet gears 11, and the planet carrier 12 together form the planetary gear stage 9.

[0040] A differential stage 13 follows the planetary gear stage 9. A coupling sun gear 34 is non-rotatably connected to the planet carrier 12. The differential stage 13 uses another planet carrier 33 as its input. The coupling sun gear 34 meshes with coupling planet gears 35, which are rotatably mounted on the other planet carrier 33. Two sets of differential planet gears 14a, b are also rotatably mounted on the other planet carrier 33 and mesh with each other in pairs. Furthermore, the differential stage 13 has two sun gears 15a, b, with sun gear 15a and sun gear 15b being non-rotatably mounted on the output shaft 5a and output shaft 5b, respectively. The differential planet gears 14a mesh with sun gear 15a, and the differential planet gears 14b mesh with sun gear 15b. Thus, differential stage 13 forms a spur gear planetary differential stage. Differential stage 13 and planetary gear stage 9 form a sub-transmission 41.

[0041] The differential stage 13 and the planetary gear stage 9 are arranged in a gearbox compartment 16 of a gearbox section 36 of the drive module 1, which has a gearbox oil atmosphere. A partition 37 is arranged between the electric motor section 32 and the gearbox section 36. In particular, the gearbox compartment 16 has an oil sump 17 containing gearbox oil in its base. Furthermore, an oil pump 18 is arranged in the gearbox compartment 16 for circulating the gearbox oil in an oil circuit.

[0042] The drive module 1 has a cooling arrangement 21, which includes a fluid cooling jacket 24 arranged coaxially and / or concentrically to the electric motor 2. The fluid cooling jacket 24 is designed as a straight hollow cylinder, with its inner circumferential surface in contact with the stator 4. A plurality of fluid channels 25 are formed in the fluid cooling jacket 24, extending in the circumferential direction around the main axis H. A cooling fluid flows in the fluid cooling jacket 24, cooling the fluid cooling jacket 24 and thus the adjacent stator 4. The fluid cooling jacket 24, and in particular the entirety of the fluid channels 25, extends wider in the axial direction to the main axis H than the stator 4. The fluid cooling jacket 24 is permeated with a cooling fluid, in particular a liquid, specifically a liquid based on water and / or alcohol.

[0043] The drive module 1 has an oil supply which, starting from the oil sump 17, circulates the transmission oil in an oil circuit by means of the oil pump 18.

[0044] An oil cooling jacket section 28 is provided as a flow component in the oil circuit, which is arranged coaxially and / or concentrically to the fluid cooling jacket 24 and / or the electric motor 2. The oil cooling jacket section 28 has a straight hollow cylindrical shape. The oil cooling jacket section 28 is formed by a sleeve 27 and the fluid cooling jacket 24, the sleeve 27 being arranged concentrically and coaxially to the fluid cooling jacket 24. The oil cooling jacket section 28 forms an oil cooling jacket volume, which is arranged in an annular space around the main axis H. On one axial side, the oil cooling jacket volume is sealed by a seal 30 between the sleeve 27 and the fluid cooling jacket 24. On the other axial side, the sleeve 27 and the fluid cooling jacket 24 are connected to each other by a material bond, in this example by a circumferential weld.The transmission oil in the oil cooling jacket section 28, in particular in the oil cooling jacket volume, is actively cooled via the fluid cooling jacket.

[0045] The transmission oil is pumped from the oil sump 17 by the oil pump 18 via a supply line 19 into the oil cooling jacket section 28 and subsequently into the annular space 7. The drive module 1 has a cover 38, in which a channel 39 forms a fluid connection from the interior of the oil cooling jacket section 28 to the rotor shaft 6, in particular to the annular space 7. The cover 38 also serves as a bearing shield for supporting the rotor shaft 6 and the output shaft 5a. The transmission oil is transferred from a static oil circuit section to the rotor shaft 6, which is a hollow shaft, via an annular volume that is fluidically open to the rotor shaft 6 and the annular space 7. The ring volume is sealed on both sides, firstly with a bearing seal 40a between the cover 38 and the output shaft 5a, and secondly with a bearing seal 40b between the cover 38 and the rotor shaft 6.The gear oil flows axially through the electric motor 2 and, in particular, the rotor 3 in the annular space 7. This flow of gear oil cools the rotor 3 and / or the rotor shaft 6, and thus the electric motor 2. The drive module 1 therefore implements active rotor shaft cooling. Furthermore, the rotor shaft 6, or the annular space 7, has an outlet opening 22 in its axial end region to direct the gear oil into the gear chamber 16. With regard to temperature, the warm gear oil is thus actively cooled via the oil cooling jacket section 28 and only then directed into the annular space 7 of the rotor shaft 6 and / or the hollow shaft to actively cool the rotor 3.

[0046] The Fig. Figure 2 shows a schematic three-dimensional representation of the fluid cooling jacket 24, which also forms a section of the oil cooling jacket section 28. At one axial end, the fluid cooling jacket 24 has a contact shoulder 20 against which the sleeve 27 rests, forming another section of the oil cooling jacket section 28. On the axial side of the contact shoulder 20, the fluid cooling jacket 24 has a groove 29 for the seal 30, which is designed as a radial seal and seals the sleeve 27 against the fluid cooling jacket 24.

[0047] The fluid cooling jacket 24 has flow deflection elements 31 on its outer circumference to extend the flow path of the gear oil. These elements are designed as axially aligned webs. First webs are arranged on one axial side, and second webs are arranged on the other axial side as flow deflection elements 31, interlocking like a comb.

[0048] The flow deflection elements 31 force the transmission oil to follow a zigzag or meandering path within the oil cooling jacket section 28. In this embodiment, the fluid cooling jacket 24, together with the fluid channels 25 and the flow deflection elements 31, is manufactured in one piece, for example, by primary forming.

[0049] The Fig. Figure 3 shows a three-dimensional representation of the drive module 1, in which it can be seen that the drive module 1 and in particular the electric motor area 32 and the gearbox area 36 are each cylindrical and / or have a cylindrical shape. Reference symbol list 1 drive module 2 electric motors 3 Rotor 4 Stator 5a, b Output shafts 6 Rotor shaft 7 annular space 8 Gear section 9 planetary gear stage 10 Spur gear teeth 11 planetary gears 12 planetary carriers 13 Differential stage 14a, b Differential planetary gears 15a, b Sun wheels 16 Gearbox compartment 17 Oil sump 18 Oil pump 19 Supply line 20 attachment shoulder 21 Cooling arrangement 22 Outlet opening 23 Intervention area 24 Fluid cooling jacket 25 fluid channels 26 Engine compartment 27 Sleeve 28 Oil cooling jacket section 29 Nut 30 Seal 31 flow deflection elements 32 Electric motor area 33 more planetary carriers 34 coupling sun wheel 35 coupling planetary gears 36 Gearbox area 37 Partition wall 38 lids Channel 39 40a,b Bearing seal 41 partial gearboxes H Main axis

Claims

Drive module (1) for a vehicle with an electric motor section (32), wherein an electric motor (2) is arranged in the electric motor section (32), the electric motor (2) comprising a rotor (3) and a stator (4), with a transmission section (36), wherein the transmission section (36) comprises a partial transmission (41), wherein a transmission chamber (16) containing transmission oil is formed in the transmission section (36), and wherein the partial transmission (41) is arranged at least partially in the transmission chamber (16), with a rotor shaft (6), wherein the rotor shaft (6) is connected to the rotor (3) of the electric motor (2), and wherein the rotor shaft (6) forms an input shaft into the partial transmission, the rotor shaft (6) being designed as a hollow shaft, with an oil circuit, wherein the transmission oil is guided from the transmission chamber (16) via the rotor shaft (6) back into the transmission chamber (16) to cool the rotor (3) via the rotor shaft (6).with a cooling arrangement (21) for cooling the electric motor (2) with a cooling fluid, wherein the cooling arrangement (21) has a fluid cooling jacket (24), wherein the fluid cooling jacket (24) surrounds the electric motor (2) to cool the stator (4) with the cooling fluid, characterized by an oil cooling jacket section (28), wherein the oil cooling jacket section (28) is fluidly arranged in the oil circuit between the gearbox (16) and the rotor shaft (6), and wherein the oil cooling jacket section (28) surrounds the fluid cooling jacket (24) to cool the gearbox oil with the cooling fluid. Drive module (1) according to claim 1, characterized in that the axial width of the oil cooling jacket section (28) is greater than or equal to the axial width of the fluid cooling jacket (24). Drive module (1) according to one of the preceding claims, characterized in that the fluid cooling jacket (24) has an outer circumferential surface and that the oil cooling jacket section (28) has a sleeve (27) with an inner circumferential surface, wherein the gear oil is guided in the oil cooling jacket section (28) between the outer circumferential surface and the inner circumferential surface. Drive module (1) according to claim 3, characterized in that flow deflection elements (31) are arranged between the outer circumferential surface and the inner circumferential surface, wherein the flow deflection elements (31) extend the flow path in the oil cooling jacket section (28). Drive module (1) according to claim 4, characterized in that the flow deflection elements (31) are fixed to the fluid cooling jacket (24) and / or that the inner circumferential surface is designed as a straight cylindrical shell surface. Drive module (1) according to one of the preceding claims, characterized in that the cooling arrangement (21) has a transmission chamber cooling section, wherein the transmission chamber cooling section is arranged in the transmission area (36) to cool the transmission oil in the transmission chamber (16) with the cooling fluid. Drive module (1) according to one of the preceding claims, characterized in that the oil circuit is led from a static oil circuit section into the rotor shaft (6). Drive module (1) according to claim 7, characterized in that the drive module has a cover (38), wherein the cover (38) has a channel (39), wherein the channel (39) fluidically connects the oil cooling jacket section (28) and the rotor shaft (6). Drive module (1) according to one of the preceding claims 1 to 6, characterized in that the drive module (1) has an output shaft (5a), wherein the output shaft (5a) is arranged in the rotor shaft (6), wherein the oil circuit is guided from a static oil circuit section via the output shaft (5a) into the rotor shaft (6). Drive module (1) according to one of the preceding claims, characterized in that the drive module (1) is designed as an electric axle and that the partial transmission has a differential stage (13) and two output shafts (5a,b), wherein the differential stage (13) distributes the drive torque to the two output shafts (5a,b) and wherein one of the output shafts (5a,b) is guided through the rotor shaft (6).

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