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 area (36), wherein the transmission area (36) has a partial transmission (40), wherein a transmission chamber (16) is formed in the transmission area (36) and wherein the partial transmission (40) 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 partial gearbox (40), 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 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 transmission chamber cooling section (20), wherein the transmission chamber cooling section (20) is arranged in the transmission area (36) to cool the transmission oil in the transmission chamber (16) with the 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, wherein the oil cooling jacket section is arranged fluidically in the oil circuit between the gearbox chamber (16) and the rotor shaft (6) and wherein the oil cooling jacket section encloses 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] DE 10 2010 008 584 A1 discloses an electric drive unit comprising an electric machine, a gearbox, an electrical circuit, and a housing forming a motor compartment and a gearbox compartment. A lubrication circuit supplies lubricating fluid for lubricating and cooling the rotor of the electric machine and the gearbox, with the lubricating fluid circulating between the motor compartment and the gearbox compartment. A separate cooling circuit supplies a coolant for cooling the stator and the electrical circuit, with the coolant in heat-exchanging contact with the lubricating fluid. A first pumping device with at least one impeller, which is fixedly connected to the rotor and, as it rotates, pumps the lubricating fluid to the components of the electric machine and / or upwards, is located in the motor compartment; a second pumping device is provided in the gearbox compartment.

[0005] The JP 2012 - 105 457 A depicts a rotating machine with a rotor mounted to rotate around a rotational axis and a surrounding stator. The rotor and the rotating shaft are cooled with cooling oil that collects in an oil pan. The stator is cooled with cooling water. Oil and cooling water circulate through separate lines. A speed converter with a gearbox for circulating the cooling oil in the oil pan converts the rotational speed of the rotor.

[0006] JP 2016-060279A discloses an in-wheel motor drive device comprising an electric motor for generating the driving force and a wheel hub bearing component for transmitting the motor's rotation to the drive wheels. Lubricating oil circulates inside the unit housing to cool the electric motor. A heat transfer element is positioned between the rear housing surface, which experiences low airflow, and at least one of the surfaces with high airflow (front, top, bottom, or side), facilitating heat transfer from the warmer to the cooler area.

[0007] US Patent 2004 / 0163409A1 discloses a drive unit for an electric vehicle comprising a motor, an inverter, a differential speed reducer, a first refrigerant (coolant), a second refrigerant, and a heat exchanger. The first refrigerant absorbs heat from the motor or inverter and dissipates it to the atmosphere. The second refrigerant absorbs heat from the motor or reducer and transfers it to the first refrigerant. The heat exchanger transfers the heat from the second to the first refrigerant and is integrated with the motor, inverter, and reducer into a single component that serves as the drive unit frame and includes various housings and supports. The heat exchanger is supplied with coolant through a coolant channel and is located beneath the motor and reducer.

[0008] 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.

[0009] 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 during normal driving operation of the vehicle. The drive module is, in particular, designed as a self-retaining assembly.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] The drive module incorporates an oil circuit, whereby the gearbox oil from the gearbox compartment is returned to the gearbox compartment via the rotor shaft. In this way, the rotor shaft is circulated with gearbox oil, thus actively cooling the rotor shaft and, consequently, the rotor of the electric motor.

[0016] 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. Thus, the electric motor is cooled internally by the oil circuit and externally, and especially by the cooling arrangement.

[0017] Within the scope of the invention, it is proposed that the cooling arrangement includes a gearbox cooling section, wherein the gearbox cooling section is arranged within the gearbox area. For example, the gearbox cooling section is arranged, at least partially, with respect to the partition wall on the side of the gearbox compartment and / or the gearbox area. In particular, the gearbox cooling section is located in the same axial section as the gearbox compartment and / or the gearbox area. This design ensures that the cooling arrangement acts on the oil circuit and, in this way, the gearbox oil in the gearbox compartment is cooled by the cooling fluid. This results in cooled gearbox oil being supplied to the oil circuit at the inlet, thus improving the cooling of the rotor and therefore of the electric motor.

[0018] One aspect of the invention is that the cooling arrangement is already present, so that with minimal design effort it can be integrated into the transmission area via the transmission chamber cooling section. In this way, cooling via the oil circuit can be significantly improved.

[0019] According to the invention, the cooling arrangement comprises a fluid cooling jacket which surrounds the electric motor. The cooling fluid flows through the fluid cooling jacket. By surrounding the stator, the fluid cooling jacket actively cools the stator and thus the electric motor. The fluid cooling jacket and the gearbox cooling section can be fluidically connected and / or use the same cooling fluid.

[0020] 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 axial 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.

[0021] It is particularly preferred that the transmission chamber cooling section is located, at least partially, in a floor area 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 area of ​​the transmission chamber. The transmission chamber cooling section may be limited to the floor area. 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 and / or to enclose the transmission chamber.

[0022] 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 in the direction of rotation. The annular channel is particularly preferably arranged coaxially and / or concentrically to the main axis.

[0023] 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.

[0024] The oil circuit preferably includes a transmission oil cooling line located between the oil sump and the rotor shaft, running in the same direction as the fluid cooling jacket. In particular, the transmission oil cooling line and the fluid cooling jacket are in thermal contact, so that the transmission oil in the transmission oil cooling line is cooled by the fluid cooling jacket. Specifically, the transmission oil temperature at the beginning of the transmission oil cooling line is higher than the transmission oil temperature at the end of the transmission oil cooling line. Specifically, the temperature difference is more than 10°C, preferably more than 25°C.

[0025] It is preferred that the drive module includes an oil pump, wherein the oil pump actively circulates the transmission oil in the oil circuit. In principle, the oil pump can be located within the transmission compartment. However, since this position could impair the cooling of the transmission oil within the transmission compartment, it is preferred to locate the oil pump outside the transmission compartment and connect it fluidically to the transmission compartment, particularly to the oil sump, via an oil line. The oil circuit thus runs from the transmission compartment via the oil line to the oil pump and subsequently, particularly directly or indirectly, into the rotor shaft.

[0026] According to the invention, the drive module has 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, so that the cooling fluid from the cooling arrangement cools the gearbox oil in the oil cooling jacket section. Preferably, the oil cooling jacket section is arranged coaxially and / or concentrically with the fluid cooling jacket.

[0027] One aspect of the invention is that the use of the oil cooling jacket section allows the gear oil to be cooled more effectively by the cooling arrangement, thereby improving the cooling of the rotor shaft, the rotor, and consequently the electric motor. This improved cooling is also achieved through a design modification of the oil circuit and / or the cooling arrangement, making it cost-effective to implement.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In one possible design 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.

[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 of the electric motor. The oil circuit 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 involves pre-cooling the gear oil from the gearbox housing (which is sealed against the electric motor housing) within the gearbox area using cooling channels and a cooling medium. In a further step, the gear oil is guided along these cooling fluid channels through the electric motor housing into a reservoir / sump in the electric motor area. By passing the gear oil past the cooling fluid channels, it is actively cooled and heat is dissipated. An oil pump and rotary union then transfer the cooled gear oil from the pump oil reservoir / sump into the drive shaft. The gear oil is fed into the rotor shaft, which is sealed on one side, via appropriately positioned inlet / outlet bores. As it passes through the rotor shaft towards the gearbox, the cooled gear oil absorbs waste heat from the rotor and is returned to the gearbox area.

[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; Fig. 2 a schematic longitudinal section view of another drive module; 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 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.

[0041] The differential stage 13 and the planetary gear stage 9 are arranged as sub-transmissions 40 in a transmission chamber 16 of a transmission section 36 of the drive module 1, which has a transmission oil atmosphere. A partition 37 is arranged between the electric motor section 32 and the transmission section 36. In particular, the transmission chamber 16 has an oil sump 17 containing transmission oil in its base area.

[0042] Furthermore, an oil pump 18 for circulating the transmission oil in an oil circuit is arranged in the drive module 1. The oil pump 18 is located in the electric motor area 32 at the end of the transmission area 32 opposite the transmission area 36 and pumps the transmission oil from a pump oil reservoir 39, the pump oil reservoir 39 being located lower than the oil sump 17 in the transmission chamber 16.

[0043] 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 direction of rotation 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 rotor 4. The fluid cooling jacket 24 is permeated by the cooling fluid, in particular a liquid, specifically a liquid based on water and / or alcohol.

[0044] Furthermore, the drive module 1 has a transmission chamber cooling section 20, which forms part of the cooling arrangement 21 and is supplied with cooling fluid. The transmission chamber cooling section 20 is located in or at least overlaps the transmission chamber 36. Along the main axis H and / or in the axial direction, the transmission chamber cooling section 20 extends into the transmission chamber 36. In particular, the transmission chamber cooling section 20 is located at least partially or completely on the axial side with respect to the partition 37 on the side of the transmission chamber 36. The transmission chamber cooling section 20 has further fluid channels 28, which extend in the circumferential direction around the main axis H and, in particular, around the transmission chamber 36. Specifically, the further fluid channels 28 of the transmission chamber cooling section 20 are located at least partially in a floor region of the transmission chamber 16.The transmission chamber cooling section 20 cools the transmission oil in the transmission chamber 16, and in particular in the oil sump 17, by means of the cooling fluid. This ensures that the transmission oil is already pre-cooled in the transmission area 36. The transmission chamber 16 has an oil sump section 27, which is arranged in the same axial section as the transmission chamber cooling section 20, so that the oil sump 17 can be effectively cooled or pre-cooled in the oil sump section 27.

[0045] In the exemplary embodiment in the Fig. 1 The gearbox cooling section 20 forms an axial extension of the fluid cooling jacket 24. It can be provided that the further fluid channels 28 have the same free inner diameter as the fluid channels 25. However, it is also possible (as is particularly evident in the Fig. 2 shown), that the other fluid channels 28 have a different, in particular a smaller, inner diameter than the fluid channels 25.

[0046] The drive module 1 has an oil supply system that circulates the transmission oil from the oil sump 17 via the oil pump 18 in an oil circuit. A supply line 19 is provided as a flow component in the oil circuit, running parallel to the fluid cooling jacket 24 in a base area. The supply line 19 connects the oil sump 17 to the pump oil reservoir 39 and thus to the oil pump 18. As the supply line 19 flows past the fluid cooling jacket 24, the transmission oil in the supply line 19 is actively cooled by the cooling fluid. For example, the temperature difference of the transmission oil between the oil sump 17 and the oil pump 18 and / or the pump oil reservoir 39 is greater than 10°C.

[0047] The gear oil is fed from the oil sump 17 via the supply line 19 to the oil pump 18 and subsequently into the annular chamber 7. Within the annular chamber 7, the gear oil flows axially through the electric motor 2 and, in particular, the rotor 3. This flow 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 chamber 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 first actively cooled in the gear chamber 16 by the gear chamber cooling section 20 and subsequently via the supply line 19, and only then is it directed into the annular chamber 7 of the rotor shaft 6 and / or the hollow shaft to actively cool the rotor 3.

[0048] The transfer of the transmission oil from the oil pump 18 can be implemented via a connecting line 29, wherein the connecting line 29 is optionally connected directly to the rotor shaft 6, in particular to the annular space 7. Alternatively - as shown in the Fig. As shown in Figure 1, the transmission oil is indirectly guided via a rotary feedthrough 30 into the drive shaft 5a, which is partially designed as a hollow shaft or at least has an axially extending channel, and from there to the rotor shaft 6, in particular to the annular space 7. The transfer from the drive shaft 5a to the rotor shaft 6 takes place via at least one radial channel 31, which fluidically connects the interior of the drive shaft 5a with the annular space 7.

[0049] In the Fig. Figure 2 shows a schematic longitudinal section of another embodiment of the drive module 1. Identical components or areas are shown in the Fig. 2 with the same reference symbols as in the Fig. 1 provided, so that reference is made to the corresponding description. In contrast to the embodiment in the Fig. 1. The gearbox chamber 16 is divided axially in the bottom area by a partition 31, with the oil sump section 27 being positioned higher than the remaining area of ​​the gearbox chamber 16 containing the oil sump 17. The gearbox chamber cooling section 20 is limited axially to the oil sump section 27. However, the supply line 19 branches, so that gearbox oil from both the oil sump section 27 and the remaining gearbox chamber / oil sump 17 is transported by the oil pump 18 towards the rotor shaft 6.

[0050] 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.

[0051] It can also be seen that the oil pump 18 is located in a corner area 38 of the drive module 1 and pumps the transmission oil via the connecting line 29 over the drive shaft 5a into the rotor shaft 6. 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 Gearbox cooling section 21 Cooling arrangement 22 Outlet opening 23 Intervention area 24 Fluid cooling jacket 25 fluid channels 26 Engine compartment 27 Oil sump section 28 additional fluid channels 29 Connecting line 30 Rotary feedthrough 31 dividing bridge 32 Electric motor area 33 more planetary carriers 34 coupling sun wheel 35 coupling planetary gears 36 Gearbox area 37 Partition wall 38 Corner area 39 Pump oil reservoir 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 (40), wherein a transmission chamber (16) is formed in the transmission section (36) and wherein the partial transmission (40) 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 (40), 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 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) comprises a gearbox cooling section (20), wherein the gearbox cooling section (20) is arranged in the gearbox area (36) to cool the gearbox oil in the gearbox (16) with the cooling fluid, wherein the cooling arrangement (21) comprises 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, wherein the oil cooling jacket section is fluidly arranged in the oil circuit between the gearbox (16) and the rotor shaft (6), and wherein the oil cooling jacket section 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 transmission chamber (16) forms an oil sump section (27), wherein the transmission chamber cooling section (20) is arranged in the same axial section of the drive module (1) as the oil sump section (27). Drive module (1) according to one of the preceding claims, characterized in that the gearbox cooling section (20) is arranged at least sectionally in a bottom area of ​​the gearbox area (36). Drive module (1) according to one of the preceding claims, characterized in that the gearbox cooling section (20) has at least one segment of an annular channel or an annular channel, wherein the annular channel extends around the gearbox compartment (16). Drive module (1) according to one of the preceding claims, characterized in that the gearbox cooling section (20) is designed as an axial extension of the fluid cooling jacket (24). 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 one of the preceding claims, 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 (40) 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).

Images