Drive train assembly and method for producing a plurality of drive trains

Abstract

The invention relates to a drive train assembly (49), the drive train assembly (49) comprising the following as assembly components (55): at least one electrical machine (9), at least one reduction-transmission kit (51) for a reduction transmission (11), at least one main-transmission kit (53) for a main transmission (13), characterized in that the assembly components (55) of the drive train assembly (49) are in the form of carry-over parts such that a plurality of drive train variants can be provided from the assembly components (55).

Description

[0001] Powertrain assembly and method for manufacturing a plurality of powertrains

[0002] The invention relates to a drive train assembly and a method for producing a plurality of drive trains.

[0003] Drivetrains of the type discussed here comprise at least one electric motor, at least one reduction gear, and a main gearbox. Different variants of such drivetrains, whether for different load applications or different arrangements on the motor vehicle, particularly as frame-mounted central drives or axle-mounted drives, are typically assembled from parts tailored specifically to the respective application. This is disadvantageous, particularly with regard to production costs as well as logistics and warehousing expenditure.

[0004] The invention is therefore based on the object of creating a drive train assembly and a method for producing a plurality of drive trains, wherein the aforementioned disadvantages are at least reduced, preferably not occurring.

[0005] According to a first aspect, the object is achieved in particular by creating a drive train assembly, wherein the drive train assembly has as assembly components: at least one electric machine, at least one reduction gear kit for a reduction gear, and at least one main gear kit for a main gear.

[0006] The components of the drivetrain assembly are designed as identical parts, allowing a variety of drivetrain variants to be created from the assembly components. The use of identical parts advantageously reduces variations in the individual parts, even while maintaining the same number of drivetrain variants to be produced. This increases the number of individual parts, and consequently reduces costs and effort for manufacturing, logistics, and warehousing.

[0007] In particular, drive train variants for motor vehicles, especially for commercial vehicles, can be manufactured from the assembly components.

[0008] The at least one electrical machine is preferably used in particular as a drive, in particular as the main drive. Alternatively or additionally, the at least one electrical machine is preferably used as a retarder. In one embodiment, at least one electrical machine of the at least one electrical machine is preferably used as the drive, in particular as the main drive, while another electrical machine of the at least one electrical machine is used as a retarder.

[0009] The use of a reduction gear allows for the use of smaller electrical machines with the same load. The reduction gear reduces the speed and increases the torque. At the same time, it advantageously reduces the installation space required.

[0010] Preferably, drive train variants for different load applications can be provided from the assembly components, that is to say in particular for motor vehicles with different rated powers and / or different weight classes or different permissible total weights, for example in a range from 101 to 1201.

[0011] A gear kit, whether a reduction gear kit or a main gear kit, is understood to be a—preferably modular—assembly of gears and gear shafts from which a corresponding gear can be manufactured. Such a gear kit can also be referred to as a gear module. The gear kit can include additional components.

[0012] In particular, such a gear kit comprises a plurality of gear groups, wherein each gear group comprises at least one gear, wherein the gears of a gear group are identical to one another if the gear group comprises more than one gear, and wherein the gears of different gear groups differ, in particular with regard to their diameter, their number of teeth, tooth shape, and / or their design, for example as a spur gear, elliptical gear, bevel gear, crown gear, worm gear or the like.

[0013] Accordingly, such a transmission kit comprises a plurality of transmission shaft groups, wherein each transmission shaft group comprises at least one transmission shaft, wherein the transmission shafts of a transmission shaft group are identical to one another if the transmission shaft group comprises more than one transmission shaft, and wherein the transmission shafts of different transmission shaft groups differ, in particular with regard to their length and / or in the arrangement of a power take-off.

[0014] By having at least some transmission shafts with a power take-off, it is possible to provide different arrangements of power take-offs or PTO shafts in the drive train variants.

[0015] In particular, each main transmission kit includes at least one identical shift mechanism.

[0016] According to a further development of the invention, the drive train assembly comprises a plurality of transmission shaft groups, each transmission shaft group having at least one transmission shaft, the transmission shafts of a transmission shaft group being identical to one another if the transmission shaft group comprises more than one transmission shaft, the transmission shafts of different transmission shaft groups differing, in particular with regard to their length and / or the arrangement of a power take-off. The transmission shafts are designed in particular to connect a reduction gear of the reduction gears to a main gear of the main gear. Advantageously, different arrangements of a drive train on a motor vehicle can be realized, in particular by selecting different transmission shafts.For example, a shorter transmission shaft can be used for a frame-fixed arrangement of a central drive, whereas a longer transmission shaft can be used for an axle-fixed drive, in particular if the reduction gear is arranged on a first side of the axle and the main gear is arranged on a second side opposite the first side - viewed perpendicular to the longitudinal direction of the axle. These longer transmission shafts are accordingly designed in particular to bridge the driven axle and to connect a reduction gear arranged on one side of the axle to a main gear arranged on the other side of the axle in a torque-transmitting manner. This distribution of the reduction gear on the one hand and the main gear on the other side of the axle advantageously results in an even weight distribution around the axle shaft.

[0017] In the context of the present technical teaching, a frame-mounted drive, in particular a frame-mounted central drive, is understood in particular to mean a drive train that is designed to be firmly connected to a motor vehicle frame of a motor vehicle, in particular a commercial vehicle, in particular to be fastened to the motor vehicle frame. Such a frame-mounted drive is preferably connected to a driven axle via a cardan shaft. A frame-mounted drive is particularly preferred for vehicles with high tonnage, high ground clearance, all-wheel drive, fording capability, and / or high hardness requirements.

[0018] In the context of the present technical teaching, an axle-mounted drive is understood in particular to mean a drive train designed to be rigidly connected to a driven axle of a motor vehicle, in particular a commercial vehicle, in particular to be attached to the driven axle. An axle-mounted drive is particularly preferred for vehicles without a power take-off, purely or at least largely used on-road (i.e., no or hardly any off-road use), axle loads of no more than 131 to 141, and / or high required ranges.

[0019] In one embodiment, the drivetrain assembly includes a bevel gear for connecting a main transmission to a differential. In a preferred embodiment, the bevel gear is used not only to connect the cardan shaft of a frame-mounted drive to the differential of the driven axle in a torque-transmitting manner, but also to connect the main transmission of an axle-mounted drive to the differential of the driven axle in a torque-transmitting manner. This advantageously allows for different gear ratios to be implemented within a constant installation space, depending on the required driving characteristics.

[0020] The object is also achieved by providing a method for producing a plurality of drive trains for motor vehicles, in particular for commercial vehicles, wherein a plurality of identical electrical machines, a plurality of identical reduction gear kits, and a plurality of identical main gear kits are used as assembly components in order to produce the plurality of drive trains from different assemblies of the assembly components, wherein as a first drive train for medium load applications a frame-mounted central drive comprising an electrical machine of the plurality of electrical machines, a reduction gear kit of the plurality of reduction gear kits, and a main gear kit of the plurality of main gear kits, and as a second drive train for high load applications a frame-mounted central drive comprising two electrical machines of the plurality of electrical machines,two reduction gear assemblies of the plurality of reduction gear assemblies and one main gear assemblies of the plurality of main gear assemblies. Advantageously, both drive trains for medium-duty applications and drive trains for heavy-duty applications can be manufactured using identical parts. Furthermore, the same advantages that were already described in connection with the drive train assembly according to the first aspect are realized in connection with the method.

[0021] According to a further development of the invention, it is provided that, as a third drive train for medium load applications, an axle-mounted drive is produced from an electric machine of the plurality of electric machines, a reduction gear kit of the plurality of reduction gear kits, and a main gear kit of the plurality of main gear kits. And, as a fourth drive train for high load applications, an axle-mounted drive is produced from two electric machines of the plurality of electric machines, two reduction gear kits of the plurality of reduction gear kits, and a main gear kit of the plurality of main gear kits. Overall, both frame-mounted and axle-mounted drives can advantageously be provided for high load applications on the one hand, and for medium load applications on the other, using the assembly components designed as identical parts.

[0022] It is preferably provided that the first drive train and the second drive train are each designed for higher loads than the third drive train and the fourth drive train; that is, a frame-mounted drive for medium load applications is designed for higher loads than an axle-mounted drive for medium load applications, and a frame-mounted drive for higher load applications is correspondingly designed for higher loads than an axle-mounted drive for higher load applications.

[0023] According to a further development of the invention, it is provided that the main transmission kits each have a plurality of identical partial transmission kits and a respective identical range group kit, wherein one partial transmission kit and one range group kit are used for the main transmission kit of the first drive train, and / or two partial transmission kits and one range group kit are used for the main transmission kit of the second drive train, and / or one partial transmission kit and one range group kit are used for the main transmission kit of the third drive train, and / or two partial transmission kits and one range group kit are used for the main transmission kit of the fourth drive train.In particular, exactly one partial transmission kit and exactly one range group kit are used for the main transmission kit of the first drive train, and / or exactly two partial transmission kits and exactly one range group kit are used for the main transmission kit of the second drive train, and / or exactly one partial transmission kit and exactly one range group kit are used for the main transmission kit of the third drive train, and / or exactly two partial transmission kits and exactly one range group kit are used for the main transmission kit of the fourth drive train.

[0024] The partial transmission kits are designed, in particular, as pre-shift transmission kits for a partial transmission, also referred to as a pre-shift transmission. The range-change transmission kits are particularly configured to produce a range-change transmission, with such a range-change transmission also being referred to as a range group or rear-shift transmission. In a manner known per se, the range-change transmission can shift between different—in particular, exactly two—gear ratio ranges, with an associated pre-shift transmission enabling different gears to be selected within the gear ratio range specified by the range-change transmission.

[0025] In particular, each partial transmission kit comprises a same first shift mechanism, and each range group kit comprises at least one same second shift mechanism.

[0026] The provision of two electric motors, two reduction gears, and two primary gears in the second drive train and in the fourth drive train, with each electric motor being assigned a reduction gear and a primary gear, advantageously enables shifting without interruption of tractive power within the gear ratio range specified by the secondary gear. In particular, two drive groups, each consisting of an electric motor, an associated reduction gear, and an associated primary gear, are connected in parallel to the secondary gear in a torque-transmitting manner.

[0027] According to a further development of the invention, it is provided that a plurality of transmission shaft groups are used, each transmission shaft group having at least one transmission shaft, the transmission shafts of a

[0028] Transmission shaft groups are identical to one another if the transmission shaft group comprises more than one transmission shaft, whereby the transmission shafts of different transmission shaft groups differ, in particular with regard to their length and / or the arrangement of a power take-off. As already explained, various arrangements of reduction gears and main gears can be advantageously implemented in this way, in particular with a view to uniform weight distribution in an axle-fixed drive, whereby various arrangements of power take-offs can also be implemented.

[0029] The object is also achieved according to a second aspect by creating a drive train assembly, wherein the drive train assembly has as assembly components: at least one electric machine, at least one reduction gear kit for a reduction gear, at least one main gear kit for a main gear, wherein the drive train assembly also has operating instructions which comprise steps for producing a plurality of drive trains using the assembly components of the drive train assembly as identical parts in a method according to the invention or a method according to one or more of the previously described embodiments. In connection with this drive train assembly according to the second aspect, in particular the same advantages are realized which have already been described in connection with the first aspect and the method.

[0030] According to a further development of the invention, it is provided that the drive train assembly - according to the first or second aspect - has a plurality of transmission shaft groups, wherein each transmission shaft group has at least one transmission shaft, wherein the transmission shafts of a transmission shaft group are identical to one another if the transmission shaft group comprises more than one transmission shaft, wherein the transmission shafts of different transmission shaft groups differ, in particular with regard to their length and / or in the arrangement of a power take-off, wherein the transmission shafts are designed in particular to connect the reduction gear to the main gear.

[0031] According to a further development of the invention, the drivetrain assembly—according to the first or second aspect—also comprises at least one cardan shaft. The cardan shaft is advantageously used, in particular, to connect a frame-mounted central drive to a driven axle, in particular a differential gear of a driven axle, in a torque-transmitting manner. According to a further development of the invention, the drivetrain assembly—according to the first or second aspect—also comprises at least one differential gear kit for a differential gear.

[0032] In an advantageous embodiment, the differential gear kit comprises components for producing a differential lock, in particular a differential lock kit. Advantageously, a limited-slip differential can be produced as the differential gear.

[0033] The invention also includes a drivetrain produced from a drivetrain assembly according to the invention—according to the first or second aspect—or a drivetrain assembly according to one or more of the previously described embodiments, or produced according to a method according to the invention or according to a method according to one or more of the previously described embodiments. In connection with the drivetrain, in particular those advantages arise that were previously explained in connection with the drivetrain assembly according to the first aspect or the second aspect, or in connection with the method.

[0034] In one embodiment, the drive train is designed as a frame-mounted central drive. In this case, the drive train preferably has a cardan shaft, by means of which it is connected to a differential gear for torque transmission.

[0035] In another embodiment, the drive train is designed as an axle-fixed drive. In this case, the drive train preferably has a bevel gear, via which it is connected to a differential gear in a torque-transmitting manner. Alternatively or additionally, at least one reduction gear of the drive train is arranged on a first side of the driven axle, with a main gear being arranged on a second side opposite the first side, perpendicular to the longitudinal direction of the axle. The reduction gear is connected to the main gear in a torque-transmitting manner via a transmission shaft bridging the axle.

[0036] In one embodiment, the drive train is designed for medium-load applications and has exactly one electric motor, exactly one reduction gear, and one main transmission. In this case, the main transmission preferably comprises exactly one primary transmission and one secondary transmission.

[0037] In another embodiment, the drive train is designed for high-load applications and comprises two electric motors and two reduction gears, as well as a main gearbox. In particular, the main gearbox comprises two primary gearboxes and one secondary gearbox. In particular, the drive train comprises exactly two drive groups, with each drive group comprising one of the two electric motors, one of the two reduction gears, and one of the two primary gearboxes. The two drive groups are connected in parallel to each other to transmit torque to the secondary gearbox.

[0038] Finally, the invention also includes a motor vehicle with a drive train according to the invention—according to the first or second aspect—or a drive train according to one or more of the previously described embodiments. In connection with the motor vehicle, the advantages that have already been explained in connection with the drive train, the drive train configuration according to the first aspect or the second aspect, or in connection with the method, in particular, arise.

[0039] In one embodiment, the motor vehicle is designed as a commercial vehicle, in particular as a truck, a bus, a construction vehicle or construction machine, a vehicle used in the field of raw material extraction, in particular a dump truck, or as a vehicle used for defense in the broader or narrower sense. The motor vehicle can be designed as a wheeled vehicle or as a tracked vehicle.

[0040] The invention is explained in more detail below with reference to the drawing. Figure 1 shows a first embodiment of a drive train of a motor vehicle; Figure 2 shows a second embodiment of a drive train;

[0041] Fig. 3 shows a third embodiment of a drive train, and

[0042] Fig. 4 shows a fourth embodiment of a drive train.

[0043] Figure 1 shows a first embodiment of a drive train 1 of a motor vehicle 3.

[0044] The drive train 1 according to the first embodiment is designed as a frame-mounted central drive for medium-load applications. It has a propeller shaft 5, by means of which it is connected to a differential gear 7 for torque transmission.

[0045] The drive train 1, designed for medium-load applications, has precisely one electric motor 9 and precisely one reduction gear 11, as well as precisely one main gear 13. In this case, the main gear 13 preferably comprises precisely one primary gear 15 and precisely one secondary gear 17. The motor vehicle 3 is preferably designed as a commercial vehicle, in particular as a truck, a bus, a construction vehicle or construction machine, as a vehicle used in the raw material extraction sector, in particular a dump truck, or as a vehicle serving defense purposes in the broader or narrower sense. The motor vehicle 3 can be designed as a wheeled vehicle or as a tracked vehicle.

[0046] The primary transmission 15 has a first transmission shaft 19, which also serves as a transmission shaft, a first, smaller-diameter gear 21, a second, larger-diameter gear 23, and a first shifting mechanism 25. The first transmission shaft 19 extends through hollow shafts associated with the gears 21, 23, and the shifting mechanism 25 can selectively connect the first gear 21 or the second gear 23 to the transmission shaft 19 in a rotationally fixed manner. In this way, two gears are realized in the primary transmission 15. The first transmission shaft 19 also has a power take-off 26.

[0047] The rear-mounted transmission 17, also referred to as a range group transmission or range-change transmission, has a second transmission shaft 27 on which a third gear 29 meshing with the first gear 21 and a fourth gear 31 meshing with the second gear 23 are permanently mounted in a rotationally fixed manner. The rear-mounted transmission 17 also has a planetary gear 33 with a sun gear 35, a planet carrier 37, and a ring gear 39. The sun gear 35 is arranged in a rotationally fixed manner on the second transmission shaft 27, while the planet carrier 37 is connected to the propshaft 5 in a torque-transmitting manner—optionally via a clutch. The rear-mounted transmission 17 also has a second shifting mechanism 41, by means of which the ring gear 39 can be selectively braked or connected to the second transmission shaft 27 in a rotationally fixed manner. In this way, two gear ratio ranges are realized in the rear-mounted transmission 17.

[0048] The propeller shaft 5 is connected to the differential gear 7 via a bevel gear 43 for transmitting torque. The differential gear 7 is mounted on a driven axle 45, to which wheels 47 are connected in a rotationally fixed manner—on the left and right sides in the direction of travel.

[0049] The drive train 1 can have one or more retarders, in particular in the form of electric machines.

[0050] The drive train 1 is made from a drive train assembly 49. The drive train assembly 49 includes at least one electric machine 9, at least one reduction gear assembly 51 for the reduction gear 11, and at least one main gear assembly 53 for the main gear 13 as assembly components 55.

[0051] The assembly components 55 of the drive train assembly 49 are designed as identical parts such that a plurality of drive train variants can be provided from the assembly components 55, in particular the exemplary embodiments of drive trains 1 shown in Figures 1 to 4.

[0052] The drive train 1 is also manufactured by means of a method for manufacturing a plurality of drive trains 1, wherein a plurality of identical electric machines 9, a plurality of identical reduction gear assemblies 51, and a plurality of identical main gear assemblies 53 are used as the assembly components 55 in order to manufacture the plurality of drive trains 1 from different assemblies of the assembly components 55.

[0053] The main transmission kits 53 preferably each have a plurality of identical partial transmission kits 57 and an identical range group kit 59.

[0054] The drive train assembly 49 also includes at least one differential gear kit 61 for the differential gear 7.

[0055] Figure 2 shows a second embodiment of a drive train 1.

[0056] Identical and functionally identical elements are provided with the same reference symbols in all figures, so that reference is made to the preceding description in each case.

[0057] The drive train 1 is also manufactured from the assembly components 55 of the drive train assembly 49 or by means of the method.

[0058] The drive train 1 according to the second embodiment is designed as an axle-fixed drive for medium-load applications. It also has the bevel drive 43 for the torque-transmitting connection to the differential gear 7. The reduction gear 11 is arranged on a first side of the driven axle 45, and the main gear 13 is arranged on a second side opposite the first side, perpendicular to the longitudinal direction of the driven axle 45. The reduction gear 11 is connected to the main gear 13 in a torque-transmitting manner via a transmission shaft 63 bridging the driven axle 45. The transmission shaft 63 is selected from a transmission shaft group 65 of the drive train assembly 49.

[0059] Figure 3 shows a third embodiment of a drive train 1.

[0060] The drive train 1 is also manufactured from the assembly components 55 of the drive train assembly 49 or by means of the method.

[0061] The drive train 1 according to the third embodiment is designed as a frame-mounted central drive for high load applications.

[0062] It differs from the first embodiment essentially in that it has two electric motors 9 and two reduction gears 11. The main gear 13 has two primary gears 15. Thus, the drive train 1 has exactly two drive groups 67, each with one of the two electric motors 9, one of the two reduction gears 11, and one of the two primary gears 15. The two drive groups 67 are connected in parallel to one another to transmit torque to the secondary gear 17.

[0063] Figure 4 shows a fourth embodiment of a drive train 1.

[0064] The drive train 1 is also manufactured from the assembly components 55 of the drive train assembly 49 or by means of the method.

[0065] The drive train 1 according to the fourth embodiment is designed as an axle-fixed central drive for high load applications.

[0066] It differs from the second embodiment essentially in that it has two electric motors 9 and two reduction gears 11. The main gear 13 has two primary gears 15. Thus, the drive train 1 has exactly two drive groups 67, each with one of the two electric motors 9, one of the two reduction gears 11, and one of the two primary gears 15. The two drive groups 67 are connected in parallel to one another to transmit torque to the secondary gear 17.

Claims

Patent claims 1. Drive train assembly (49), wherein the drive train assembly (49) has as assembly components (55): at least one electric machine (9), at least one reduction gear kit (51) for a reduction gear (11), at least one main gear kit (53) for a main gear (13), characterized in that the assembly components (55) of the drive train assembly (49) are designed as identical parts in such a way that a plurality of drive train variants can be provided from the assembly components (55).

2. Drive train assembly (49) according to claim 1, with a plurality of transmission shaft groups (65), wherein each transmission shaft group (65) has at least one transmission shaft (63), wherein the transmission shafts (63) of a transmission shaft group (65) are identical to one another if the transmission shaft group (65) comprises more than one transmission shaft (63), wherein the transmission shafts (63) of different transmission shaft groups (65) differ, in particular with regard to their length and / or in the arrangement of a power take-off (26), wherein the transmission shafts (63) are designed in particular to connect the reduction gear (11) to the main gear (13).

3. Method for producing a plurality of drive trains (1) for motor vehicles (3), in particular for a commercial vehicle, wherein as assembly components (55) a plurality of identical electrical machines (9), a plurality of identical reduction gear assemblies (51), and a plurality of identical main gear assemblies (53) are used to produce the plurality of drive trains (1) from different combinations of the combination components (55), wherein a frame-mounted central drive comprising an electrical machine (9) of the plurality of electrical machines (9), a reduction gear assemblies (51) of the plurality of reduction gear assemblies (51), and a main gear assemblies (53) of the plurality of main gear assemblies (53) is used as a first drive train (1) for medium load applications, and a frame-mounted central drive comprising two electrical machines (9) of the plurality of electrical machines (9) is used as a second drive train (1) for high load applications,two reduction gear assemblies (51) of the plurality of reduction gear assemblies (51) and one main gear assemblies (53) of the plurality of main gear assemblies (53).

4. The method according to claim 3, wherein an axle-fixed drive comprising an electrical machine (9) of the plurality of electrical machines (9), a reduction gear assembly (51) of the plurality of reduction gear assemblies (51) and a main gear assembly (53) of the plurality of main gear assemblies (53) is produced as a third drive train (1) for medium load applications, and an axle-fixed drive comprising two electrical machines (9) of the plurality of electrical machines (9), two reduction gear assemblies (51) of the plurality of reduction gear assemblies (51) and a main gear assembly (53) of the plurality of main gear assemblies (53) is produced as a fourth drive train (1) for high load applications.

5. Method according to one of claims 3 or 4, wherein the main transmission kits (53) each have a plurality of identical partial transmission kits (57) and a respective identical range group kit (59), wherein a partial transmission kit (57) and a range group kit (59) are used for the main transmission kit (53) of the first drive train (1), and / or two partial transmission kits (57) and one range group kit (59) are used for the main transmission kit (53) of the second drive train (1), and / or one partial transmission kit (57) and one range group kit (59) are used for the main transmission kit (53) of the third drive train (1), and / or two partial transmission kits (57) and one range group kit (59) are used for the main transmission kit (53) of the fourth drive train (1).

6. Method according to one of claims 3 to 5, wherein a plurality of transmission shaft groups (65) - in particular for the respective connection of the reduction gear (11) to the main gear (13) - is used, wherein each transmission shaft group (65) has at least one transmission shaft (63), wherein the transmission shafts (63) of a transmission shaft group (65) are identical to one another if the transmission shaft group (65) comprises more than one transmission shaft (63), wherein the transmission shafts (63) of different transmission shaft groups (65) differ, in particular with regard to their length and / or in the arrangement of a power take-off (26).

7. Drive train assembly (49), wherein the drive train assembly (49) has as assembly components (55): at least one electric machine (9), at least one reduction gear kit (51) for a reduction gear (11), at least one main gear kit (53) for a main gear (13), characterized in that the drive train assembly (49) has operating instructions which comprise steps for producing a plurality of drive trains (1) using the assembly components (55) of the drive train assembly (49) as identical parts in a method according to one of claims 3 to 6.

8. Drive train assembly (49) according to claim 7, comprising a plurality of transmission shaft groups (65), each transmission shaft group (65) having at least one transmission shaft (63), the transmission shafts (63) of a transmission shaft group (65) being identical to one another if the transmission shaft group (65) comprises more than one transmission shaft (63), the transmission shafts (63) of different transmission shaft groups (65) differ, in particular with regard to their length and / or in the arrangement of a power take-off (26), wherein the transmission shafts (63) are designed in particular to connect the reduction gear (11) to the main gear (13).

9. Drive train assembly (49) according to one of claims 1 to 2 or 7 to 8, with at least one cardan shaft (5).

10. Drive train assembly (49) according to one of claims 1 to 2 or 7 to 9, with at least one differential gear kit (61) for a differential gear (7).

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