Electric bridge driver for vehicle, electric driving assembly and vehicle

Abstract

The utility model relates to an electric bridge driver for a vehicle, an electric driving assembly and the vehicle. The electric bridge driver is provided with a first axle (2) used for installing wheels (6) and electric driving devices (7, 7.1 and 7.2) used for driving the first axle (2). The bridge drive (1) further comprises an output (14) for mechanically connecting a second axle (2; 50) for mounting the wheels (6). The electric bridge drive (1) is designed to drive the second axle (2, 50) by means of the electric drive (7, 7.1, 7.2) of the first axle (2) via the output (14).

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric axle drive, an electric drive assembly having such an electric axle drive and a vehicle having such a drive assembly. BACKGROUND

[0002] Electric axle drives are developed in the context of the electrification of drive assemblies of vehicles, with which axle drives the vehicle axle can be driven. In order to provide all-wheel drive of a vehicle, it is known to equip each axle thereof with its own electric axle drive in order to be able to provide an all-wheel function. SUMMARY

[0003] The utility model relates to an electric axle drive for a vehicle. The vehicle can be a utility vehicle, for example a truck. The vehicle can be an off-road vehicle or a road vehicle. The vehicle is for example a military vehicle, for example a wheeled armoured vehicle. The electric axle drive has a first axle for driving a wheel. The wheel can be in direct mechanical action connection with the first axle and, alternatively or additionally, in mechanical action connection via one or more transmission stages. Torque can be delivered to the wheel by the first axle to propel the vehicle. The electric axle drive further comprises a drive device for driving the first axle. The drive device can have one or more drive units, for example electric motors. The drive device can be configured for providing torque with which the vehicle can be conventionally moved forwards. Thus, the torque of the drive device can be transmitted to the first axle and from the first axle to the wheel for propelling the vehicle.

[0004] Here, the electric axle drive can be spatially and functionally assigned to the first axle. For example, the electric axle drive can be configured coaxially with the first axle. In an alternative embodiment, the electric axle drive is arranged axially in parallel with the first axle, but is still spatially assigned to the first axle. This can for example make it possible for the electric axle drive to be arranged closer to the first axle than at other axles of the vehicle. The wheel can be a wheel which is in direct contact with the ground for moving the vehicle. Alternatively, the wheel can also be a wheel which is in engagement with a circulating loop element, for example a chain. The drive device can be arranged transversely to the vehicle direction, for example such that an output of the drive device is arranged in parallel with or coaxially to the first axle axis.

[0005] Furthermore, the electric axle drive has an output for mechanically interfacing a second axle. The output can for example be a gear which can be configured as a fixed wheel. For example, the gear is configured as a bevel gear. Alternatively, the output can be configured as another machine element by means of which torque can be transmitted to the second axle. According to the above-mentioned embodiment, the second axle can be configured in conjunction with the first axle. In one embodiment, the output can be configured for interfacing to a machine element which is typically used in conjunction with an internal combustion engine for an all-wheel system.

[0006] The electric axle drive is configured here to drive not only the first axle but also the second axle via the output using the electric drive. The electric axle drive can output torque to the second axle via the output, which can be designed individually or in combination with the torque of a further drive for driving the second axle. The electric axle drive can distribute the torque of the drive equally or unequally to the first and second axles here. For example, a larger proportion of the torque can be transmitted to the first axle and a smaller proportion of the torque can be transmitted to the second axle. The electric axle drive can have a gearshift device with which the second axle can be selectively switched on or switched off. The second axle can be an axle configured for operation in combination with an internal combustion engine here. The second axle can be, for example, an axle designed for an internal combustion engine. The output of the electric axle drive can be connected to the second axle via a cardan shaft, for example via a cardan shaft designed for an internal combustion engine.

[0007] Within the scope of the utility model, an electric axle drive is provided with which all-wheel drive of a vehicle, for example a utility vehicle, can be realized in a simple and cost-effective manner. If, for example, a conventional all-wheel drive designed for an internal combustion engine is to be electrified, the electric axle drive of the utility model can be arranged on one of the axles of the vehicle and mechanically connected via its output to the further axle of the vehicle. The connection to the further axle can be realized here, for example, by means of components already present. In one case, for the electrification of an all-wheel vehicle, therefore, only the replacement of the axle having the electric axle drive of the utility model can be required. The all-wheel drive of the vehicle can thus be electrified in a simple and cost-effective manner and method. The subsequent electrification of the all-wheel drive of a vehicle can also be realized with the electric axle drive of the utility model, for example in the context of a retrofit solution.

[0008] In the scope of an embodiment, the first axle has a first axle section for mounting the first wheel and a second axle section for mounting the second wheel. The axle sections can each be components which can be formed by one or more components which are connected to one another in a rotationally fixed manner. The wheels can be connected to each axle section in the manner and method described above. In the scope of an embodiment, the electric axle drive can also have a transverse differential which is in mechanical action connection with the first and second axle sections, for rotational speed compensation between the axle sections. The transverse differential can be a differential of the bevel gear design type. Alternatively or additionally, the transverse differential can be a differential of the planetary gear design type. The transverse differential can be arranged coaxially with the first and second axle sections. If the transverse differential is a bevel gear differential, it can have a differential housing which can be in mechanical action connection with the electric drive device in order to drive the axle sections and the wheels connected thereto. Two bevel gears which are arranged parallel to one another can be supported in the differential housing, the bevel gears being connected in a rotationally fixed manner to the axle sections, respectively. The bevel gears can each be in engagement with an intermediate gear in order to enable rotational speed compensation between the axle sections. The axle can also have a differential lock, for example at least one of the axle sections can be connected in a rotationally fixed, selective manner to the differential housing by means of the differential lock.

[0009] In the scope of an embodiment, the electric axle drive has a transmission with a plurality of gears for driving the first and second axles. The transmission can be arranged in the torque transmission path between the electric drive device and the output. The transmission can be constructed coaxially with the first axle. The transmission can be a transmission of the planetary gear design type and alternatively or additionally of the cylindrical gear design type. The transmission can have a gearshift device, for example one or more gearshift elements, by means of which different transmission ratios, i.e. different gears, can be switched out. The transmission can provide one or more gears in the forward and reverse direction. The drive device, the transmission and the transverse differential described above can all be arranged in the electric axle drive of the application and can be arranged in this order or in another order in the direction of the first axle. By providing the transmission, an electric axle drive can be provided which has a particularly compact design, since the rotational speed range which can be provided by the electric drive device can be reduced. Here, the electric axle drive can be constructed such that the first axle and the second axle are driven with the same or different transmission ratios.

[0010] Within the scope of one embodiment, the electric drive arrangement has a single electric motor. The single electric motor can have a rotor and a stator, which can be arranged coaxially with the first axle. Within the scope of this embodiment, a particularly compact electric axle drive can be provided. In an alternative embodiment, the electric drive arrangement has a plurality of electric drive motors, for example two electric drive motors, which can each have a rotor and a stator. The plurality of electric drive motors, for example two electric drive motors, can each be configured coaxially with the first axle. For example, the plurality of electric drive motors have the same outer diameter in order to provide an electric axle drive with a uniform outer contour and thus good integrability into a vehicle. The single electric drive motor or the plurality of electric drive motors can each be configured for driving the first axle and the second axle via the output.

[0011] If the electric axle drive has a single electric drive motor, this electric drive motor can be arranged before or after the transmission of the electric axle drive in the direction of the first axle. Thus, an electric axle drive can be provided which has a comparatively low radial extent. Conversely, if the electric axle drive has an electric drive arrangement with a plurality of electric drive motors, these electric drive motors can be arranged radially outside the transmission of the electric axle drive, but axially overlapping this transmission. Thus, an electric axle drive can be provided which has a particularly compact axial construction length.

[0012] Within the scope of one embodiment, the axle drive has a further output for mechanically interfacing a third axle to which a wheel is mounted. With regard to the configuration of the further output and the third axle, reference is made to the above-described embodiments relating to the output and the first axle. In the embodiment, the output and the further output are provided by two separate elements. However, alternatively, a single element can also form the output and the further output. Within the scope of this embodiment, the electric axle drive can be configured for driving the third axle via the further output with the electric drive arrangement of the first axle. Thus, the electric drive arrangement can be configured for driving the first, second and third axles. The first axle can be, for example, a rear axle of the vehicle, and the second axle can be a front axle of the vehicle. The third axle can be, for example, a second rear axle. Alternative design variants are also conceivable.

[0013] Within the scope of one embodiment, the electric axle drive has a longitudinal differential for rotational speed compensation between the first axle and the second axle. The longitudinal differential can be configured to enable the first axle and the second axle to be rotated at different rotational speeds. Furthermore, the longitudinal differential can be configured to transmit the torque of the electric drive device to the first and second axles, for example to distribute it to the first and second axles. As described above, the distribution to the first and second axles in equal or different shares can be achieved here by means of the longitudinal differential. The longitudinal differential can be arranged coaxially with the electric drive device and, alternatively or additionally, coaxially with the first axle. If the torque of the electric drive device is to be distributed to the first and second axles in different shares, the longitudinal differential can be a planetary gear differential. The planetary gear differential can be configured as a negative or positive planetary gear set. The planetary gear differential can have one or more planetary gear sets. In an embodiment, the planetary gear differential has a unique planetary gear set which is configured as a negative planetary gear set. The planetary gear differential can have a stand differential which enables the torque of the electric drive device to be distributed to the first and second axles in different shares.

[0014] For example, the electric axle drive can be configured as a rear axle drive, while the front axle can be mechanically coupled to the output. By means of the longitudinal differential configured as a planetary gear differential, the torque of the electric drive device can now be distributed to the rear axle or to the front axle, for example to cancel out a larger share acting on the rear axle and a smaller share acting on the front axle. Alternatively or additionally, the longitudinal differential can have a bevel gear differential which can distribute the torque of the electric drive device to the first and second axles in equal shares. The bevel gear differential of the longitudinal differential can be arranged coaxially with the first axle. Thus, an electric axle drive can be provided which has a particularly compact construction type.

[0015] The utility model also relates to an electric drive assembly with an electric axle drive according to one of the above-mentioned embodiments. The electric drive assembly further comprises a second axle, wherein the second axle can be driven by the electric drive device and the output of the first axle. Like the first axle, the second axle can also have a transverse differential according to the above-mentioned embodiments. If the electric axle drive of the first axle has a longitudinal differential, the second axle can be rigidly, for example in a non-switchable manner, coupled to the output of the electric axle drive of the first axle. Conversely, if the electric axle drive of the first axle does not have a longitudinal differential, the second axle can be coupled to the output by means of a shift device in order to enable a selective switching on or switching off of the second axle.

[0016] In one embodiment, the electric drive assembly has two electric axle drives according to one of the above-described embodiments. Here, the electric axle drives can be embodiments without a longitudinal differential each. The outputs of the two electric axle drives can here be introduced into a torque transmission state, in which torque can be transmitted from one output to the other (or vice versa). For this, a shift device can be provided in order to selectively establish or release a mechanical action connection between the outputs of the electric axle drives. The electric drive assembly of this embodiment can here be configured such that a possible rotational speed difference between the first and second axle can be compensated by the own electric drive of the respective axle. Furthermore, the utility model relates to a vehicle with an electric drive assembly according to one of the above-described embodiments. With regard to the design solutions and advantages of the individual features, reference is made to the above-described embodiments relating to the electric axle drives. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figures la to lc An electric axle drive of a vehicle with a unique electric drive motor according to an embodiment of the utility model is shown,

[0018] Figures 2a to 2c An electric axle drive of a vehicle with two electric drive motors according to an embodiment of the utility model is shown,

[0019] Figures 3a to 3c An electric drive assembly of a vehicle with two axles and at least one electric axle drive according to an embodiment of the utility model is shown, Figures la to 2c

[0020] Figures 4a to 4d An electric drive assembly of a vehicle with three axles and at least one electric axle drive according to an embodiment of the utility model is shown, Figures la to 2c

[0021] Figures 5a to 5c An electric drive assembly of a vehicle with two rear axles and at least one electric axle drive according to an embodiment of the utility model is shown. Figures la to 2c DETAILED DESCRIPTION

[0022] Figure la ​​​An electric axle drive 1 for a vehicle according to an embodiment of the present application is shown. The axle drive 1 comprises an axle 2 having a first axle section 3, a second axle section 4 and a transverse differential 5. Wheels 6 are mounted anti-rotationally on the first axle section 3 and the second axle section 4, respectively. The transverse differential 5 is configured for enabling a compensation of a rotational speed difference between the first axle section 3 and the second axle section 4. In the present embodiment, the transverse differential 5 is configured as a bevel differential. The transverse differential 5 can here have a differential lock 17, by which the differential housing 11 of the transverse differential 5 can be selectively connected anti-rotationally with the second axle section 4.

[0023] Furthermore, the electric axle drive 1 has an electric drive device 7 having a single electric motor. The electric drive device 7 is arranged coaxially with the axle 2 and, in the present embodiment, radially outside the first axle section 3. The electric drive device 7 is electrically connected with a not shown battery in order to provide a drive torque for driving the axle 2. In the present embodiment, the electric drive device 7 is in mechanical action connection with a transmission 8, which is at present connected anti-rotationally, having an input 9 and an output 10. The transmission input 9 is connected anti-rotationally with the electric drive device 7. The transmission output 10 is connected anti-rotationally with the transverse differential 5, more precisely with the differential housing 11 of the transverse differential 5. Thus, a torque provided via the transmission output 10 is transmitted to the differential housing 11 of the transverse differential 5. The differential housing 11 now transmits the torque to the axle sections 3, 4 and, via the axle sections, to the wheels 6 in order to propel the vehicle. In the differential housing 11, a plurality of bevel gears are supported in mesh with one another, by which a rotational speed compensation between the first axle section 3 and the second axle section 4 is possible.

[0024] In the present embodiment, the transmission 8 is configured as a planetary transmission having three planetary gear sets 12 and a shift device 13 having a plurality of shift elements for shifting out different gear steps. The three planetary gear sets 12 as well as the shift device 13 are in mechanical connection with one another, so that different gear steps can be shifted out by the shift device 13, which have different transmission ratios between the transmission input 9 and the transmission output 10. For example, three different gear steps can be shifted out with the transmission 8. In the present embodiment, the transmission 8 is arranged coaxially with the axle 2 and, in the axial direction of the axle 2, between the electric drive device 7 and the transverse differential 5.

[0025] Furthermore, the electric axle drive 1 comprises an output 14 for a mechanical connection Figure laA second vehicle axle, not shown, can be configured analogously to the first vehicle axle 2 and thus also has a first vehicle axle section 3, a second vehicle axle section 4 and a transverse differential 5 mechanically acting therewith. In the present embodiment, the output 14 is configured as a fixed wheel which is arranged in a rotationally fixed manner on the differential housing 11 of the transverse differential 5. In the present embodiment, the fixed wheel 14 is configured as a disc gear. A bevel pinion 15 can be mechanically meshed with the disc gear 14 in order to be able to transmit the torque of the electric drive 7 to the second vehicle axle, not shown. A shift device 16 can be provided here which has to be actuated in order to establish a mechanical action between the disc gear 14 and the second vehicle axle, not shown. If the shift device 16 is, for example, engaged, a mechanical action between the disc gear 14 and the second vehicle axle, not shown, can be established. Conversely, if the shift device 16 is disengaged, the torque cannot be transmitted from the disc gear 14 to the second vehicle axle, not shown.

[0026] Thus, Figure la The electric vehicle axle drive 1 in the illustrated embodiment is configured for transmitting the torque of the electric drive 7 to the first vehicle axle 2 via the transmission 8 with different gear ratios and to the second vehicle axle, not shown, via the output 14. Thus, for example, a full-time electrically driven all-wheel drive of a vehicle can be provided in a simple and cost-effective manner with the electric vehicle axle drive 1 of the present embodiment.

[0027] Figure lb An electric vehicle axle drive 1 according to a further embodiment of the present application is shown. Apart from the differences described later on, Figure lb The vehicle axle drive 1 of the embodiment of Figure la The vehicle axle drive 1 of the embodiment of. Identical reference signs denote corresponding components. In contrast to the embodiment of Figure la The electric vehicle axle drive 1 of the embodiment of Figure lb The electric vehicle axle drive 1 of the embodiment of is provided with a longitudinal differential 20 which is mechanically acting with the transmission output 10, the transverse differential 5 and the output 14 of the electric vehicle axle drive 1. The longitudinal differential 20 is arranged coaxially to the vehicle axle 2 and is configured as a planetary gear differential. The longitudinal differential 20 of the present embodiment is also configured for distributing the torque of the transmission output 10 to the first vehicle axle 2 and to a further vehicle axle, not shown, which is mechanically coupled with the output 14. Here, the planetary gear differential 20 of the present embodiment is configured for distributing the torque at the transmission output 10 unevenly between the first vehicle axle 2 and the further vehicle axle, not shown. In other words, the torque of the transmission output 10 is distributed by the planetary gear differential 20 of the present embodiment in such a way that one of the vehicle axles receives a higher torque than the other vehicle axle.

[0028] The longitudinal differential 20, which is constructed in the planetary type, has a planetary gear set with a sun wheel 21, a planet carrier 22 (and the planet gears 23 rotatably supported thereon) and a ring gear 24. The sun wheel 21 of the longitudinal differential 20 is permanently connected against relative rotation to the output 14, which is constructed as a disc gear. The ring gear 24 of the longitudinal differential 20 is permanently connected against relative rotation to the differential housing 11 of the transverse differential 5 of the first axle 2. Furthermore, the planet carrier 22 of the longitudinal differential 20 is permanently connected against relative rotation to the transmission output 10 of the transmission 8. The torque of the transmission output 10, which is introduced into the longitudinal differential 20 via the planet carrier 22, is distributed by the longitudinal differential 20 onto the sun wheel 21 and the ring gear 24 and thus onto the transverse differential 5 and the output 14. The distribution of the torque onto these two components is effected here in accordance with the fixed axle ratio provided by the longitudinal differential 20. Furthermore, the longitudinal differential 20 is constructed for the possibility of compensating for a rotational speed difference between the first axle 2 and a second axle, not shown, which is mechanically connected to the output 14. The longitudinal differential 20 furthermore has a differential lock 25, by means of which the planet carrier 22 can be selectively connected against relative rotation to the sun wheel 21 of the longitudinal differential 20 in order to interlock the planetary gear set.

[0029] Figure lc A further embodiment of the electric axle drive 1 according to the application is shown. Apart from the differences described later on, the electric axle drive 1 according to the embodiment of the application corresponds to the electric axle drive 1 according to the embodiment of the application shown in Fig. 1. Figure lc The electric axle drive 1 according to the embodiment of the application corresponds to the electric axle drive according to the embodiment of the application shown in Fig. 1. Figure lb The electric axle drive 1 according to the embodiment of the application corresponds to the electric axle drive according to the embodiment of the application shown in Fig. 1. Figure lb The electric axle drive 1 according to the embodiment of the application corresponds to the electric axle drive according to the embodiment of the application shown in Fig. 1. Figure lc The electric axle drive 1 according to the embodiment of the application corresponds to the electric axle drive according to the embodiment of the application shown in Fig. 1.

[0030] The bevel differential 20' comprises a differential housing 26' which is permanently rotationally fixedly connected to the transmission output 10 of the transmission 8. Furthermore, the bevel differential 20' comprises a first bevel gear 27' which is arranged coaxially to the first axle 2 and which is permanently rotationally fixedly connected to the differential housing 11 of the transverse differential 5. A further bevel gear 28' which is arranged coaxially to the axle 2 is permanently rotationally fixedly connected to the output 14 which is configured as a crown wheel. The bevel gears 27' and 28' are mechanically connected via an intermediate gear 29' which is configured as a bevel gear. Thus, a rotational speed difference between the first axle 2 and a second axle which is not shown can be compensated by the bevel differential 20'. According to Figure lb the embodiment, Figure lc the longitudinal differential 20' of the embodiment comprises a differential lock 25'. The output 14 can be selectively rotationally fixedly connected to the differential housing 11 of the transverse differential 5 via the differential lock 25'.

[0031] Figure 2a An electric axle drive 1 with two electric motors 7.1 and 7.2 according to an embodiment of the application is shown. Apart from the differences described later on, Figure 2a the electric axle drive 1 of the embodiment corresponds to Figure la the electric axle drive 1 of the embodiment. Identical reference signs denote corresponding components. In contrast to Figure la the embodiment, Figure 2a the embodiment has an electric drive with two electric motors 7.1 and 7.2. Figure 2a the transmission 8' of the embodiment has two transmission inputs 9.1 and 9.2, one of the electric motors 7.1 and 7.2 being mechanically connected to a transmission input, respectively.

[0032] Furthermore, Figure 2a the transmission 8' of the embodiment has a design which differs from Figure la the transmission 8 of the embodiment. However, like the transmission of Figure la the embodiment, Figure 2a the transmission 8' of the embodiment also has a plurality of planetary gear sets, currently two planetary gear sets 12' and a gear shift device 13' with a plurality of gear shift elements which are all configured coaxially to the first axle 2. Different transmission ratios between the transmission inputs 9.1 and 9.2 and the transmission output 10 can be switched by the gear shift elements of the gear shift device 13', for example in Figure la the transmission 8 of the embodiment. Here, Figure 2a the electric axle drive 1 of the embodiment has a higher power level which is provided mainly by the provision of two electric motors 7.1 and 7.2. Furthermore, Figure 2aThe electric axle drive 1 according to the embodiment comprises a planetary gear 26 between the axle sections 3 and 4 and the wheels 6, respectively, for providing an additional gear ratio.

[0033] Apart from the differences described later on, Figure 2b The electric axle drive 1 according to the embodiment corresponds to Figure 2a The electric axle drive 1 according to the embodiment. Identical reference signs denote corresponding components. In contrast to the embodiment according to Figure 2a The electric axle drive 1 according to the embodiment differs from the embodiment according to Figure 2b The transmission output 10 in the embodiment according to is not connected in a rotationally fixed manner to the differential housing 11 of the transverse differential 5, but is connected to a longitudinal differential 20 which is configured as a planetary differential. It has thus already been described in connection with the embodiment according to Figure lb The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to Figure lb The electric axle drive 1 according to the embodiment is mechanically connected to the transmission output 10, the transverse differential 5 and the output 14. In this respect, reference is made to the embodiments relating to the embodiment according to Figure 2b The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to Figure lb The electric axle drive 1 according to the embodiment is mechanically connected to the transmission output 10, the transverse differential 5 and the output 14. In this respect, reference is made to the embodiments relating to the embodiment according to

[0034] In the embodiments according to Figure lb and 2b The longitudinal differential 20 configured as a planetary differential, the output 14 and the transverse differential 5 are arranged in this order in the direction of the first axle 2 from the left axle section 3 to the right axle section 4. In the embodiment according to Figure 2c The longitudinal differential 20 configured as a planetary differential, the output 14 and the transverse differential 5 are arranged in this order in the direction of the first axle 2 from the left axle section 3 to the right axle section 4. In the embodiment according to Figure 2c The electric axle drive 1 according to the embodiment is configured according to the embodiment according to Figure 2b The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to

[0035] The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to Figure 3a An electric drive assembly 100 according to an embodiment of the application is shown. The electric drive assembly 100 comprises an electric axle drive 1 according to the embodiment according to Figure lb The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to Figure 2b The electric axle drive 1 according to the embodiment. According to the design concept of the embodiment according to Figure 3aIn the electric drive assembly 100, the electric drive device 7 or the electric motor 7.1 and 7.2 and the transmission 8 or 8' are not considered and are therefore not shown in detail. The transmission output 10 is shown, which is continuously connected against relative rotation to the longitudinal differential 20, which is configured as a planetary differential. The electric axle drive 1 comprises a first axle 2, which is currently configured as a rear axle. Furthermore, the electric drive assembly 100 comprises a second axle 50, which is currently configured as a front axle. The front axle 50 is configured with a first axle section 51, a second axle section 52 and a transverse differential 53, corresponding to the rear axle 2. Through the transverse differential 53, a rotational speed difference between the first and second axle sections 51, 52 can be compensated. On the differential housing 54 of the transverse differential 53, a fixed wheel 55 is arranged, which is configured as a disc wheel, which is mechanically connected to the output 14 of the electric axle drive 1. In the present embodiment, for this purpose, a shaft 56 is provided, on the end of which a conical pinion 15, which engages with the fixed wheels 14 and 55, is mounted against relative rotation, respectively. The rotational speed compensation between the rear axle 2 and the front axle 50 can be carried out by the longitudinal differential 20, which is configured as a planetary differential.

[0036] Figure 3b An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3a An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3a An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3b An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3a An embodiment of the drive assembly 100 is shown, which is configured according to the

[0037] Figure 3c An embodiment of the drive assembly 100 is shown, which is configured according to the Figure la An embodiment of the drive assembly 100 is shown, which is configured according to the 2a An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3c An embodiment of the drive assembly 100 is shown, which is configured according to the Figure 3cThe electric drive assembly 100 according to an embodiment comprises a second electric axle drive 1 with a second axle 2, which in the present embodiment is configured as a rear axle. The second electric axle drive 1 is configured in accordance with the first electric axle drive 1 for the front axle 2. In the present embodiment, the outputs 14 of the electric axle drives 1 of the front and rear axles, which are each configured as a fixed wheel, can be connected here in a mechanically acting manner. To this end, a shift device 16 is provided as described in connection with the embodiment of Figure la The shift device 16 makes it possible for the two conical pinions 15, which are each in engagement with an output 14, to be connected to one another in an anti-rotationally fixed manner via a shaft 56. As a result, torque can be transmitted from the axle drive 1 for the front axle 2 to the axle drive 1 for the rear axle, and vice versa. Figure 3c The embodiment of the drive assembly 100 does not have a longitudinal differential here, since the rotational speed difference between the front axle and the rear axle can be compensated by the respective drive of the axle drive 1.

[0038] Figure 4a An electric drive assembly 100 is shown, which is configured in accordance with one of the embodiments of Figure la and 2a The axle 2 of the electric axle drive 1 is a first rear axle. In addition, the electric drive assembly 100 comprises a second rear axle 50 and a front axle 50, which are each configured in accordance with the front axle 50 according to an embodiment of Figure 3a The fixed wheels 55 of the transverse differentials 54 of the front axle 50 and the second rear axle 50 are each in engagement with a conical pinion 15, which can be connected to one another in an anti-rotationally fixed manner via a shaft 56 by means of a shift device 16 as described above. The conical pinions 15 are in engagement with an output 14. As a result, in addition to the first rear axle 2, torque of the electric axle drive 1 can also be transmitted by means of the output 14 to the second rear axle 50 and to the front axle 50. The output 14 is thus configured for driving the second axle, i.e. the front axle 50. In addition, the output 14 is configured for driving a further output of the third axle 50, i.e. of the second rear axle.

[0039] Figure 4b A drive assembly 100 according to a further embodiment of the application is shown. Apart from the differences described later, the drive assembly 100 according to Figure 4b is configured in accordance with the drive assembly 100 according to Figure 4a Unlike the drive assembly 100 according to Figure 4a In the embodiment according to Figure 4b the electric axle drive 1 of the first rear axle 2 is configured with a longitudinal differential 20, which is configured as a planetary differential. The configuration is in accordance with the embodiment according to Figure lb or Figure 2bThe output 14 of the electric axle drive 1 is mechanically connected to the transverse differential 53 of the second axle 50, i.e. the front axle, via a bevel pinion 15 and a shaft 56 without a gearshift device. The transverse differential 5 of the first rear axle 2 is configured as a further output 14.1 in the form of a fixed wheel provided thereon. According to the design described in connection with Figure 4a The third axle 50, i.e. the second rear axle, can be mechanically connected to the further output 14.1 via a gearshift device 16 according to the design described in connection with

[0040] Figure 4c A drive assembly 100 according to a further embodiment of the application is shown. Apart from the differences described later on, the drive assembly 100 is configured according to the drive assembly 100 of Figure 4b Unlike the drive assembly 100 of Figure 4b The electric axle drive 1 of the first rear axle 2 is in the drive assembly 100 according to Figure 4c configured according to one of the embodiments of Figure lc and 2c Accordingly, the electric axle drive 1 of the embodiment of Figure 4c The electric axle drive 1 of the embodiment of Figure 4b The third axle 50, i.e. the second rear axle, can be selectively connected via a gearshift device 16 according to the embodiment in connection with

[0041] Figure 4d A further embodiment of an electric drive assembly 100 according to an embodiment of the application is shown. Apart from the differences described later on, the drive assembly 100 of Figure 4d corresponds to the drive assembly 100 of Figure 4c the embodiment of the drive assembly 100. Unlike the drive assembly 100 of Figure 4c In the drive assembly 100 of Figure 4d the third axle, i.e. the second rear axle 2, is configured with its own electric axle drive 1. In this embodiment, the electric axle drive 1 of the second rear axle 2 is configured according to Figure la the embodiment of the drive assembly 100 orFigure 2a The second rear axle 2 is configured according to an embodiment of the application and thus does not have a longitudinal differential 20 or 20'. The transmission output 10 of the electric axle drive 1 of the second rear axle 2 can be mechanically connected to the further output 14.1 via a shift device 16 according to an embodiment in combination with Figure 4c The further output 14.1 of the electric axle drive 1 of the first rear axle 2 is mechanically connected according to an embodiment in combination with

[0042] Figure 5a An electric drive assembly 100 according to a further embodiment of the application is shown. Figure 5a The drive assembly 100 shown is a rear-wheel drive assembly with a first rear axle 2 and a second rear axle 2. Here, the electric axle drive 1 of the first rear axle 2 is configured according to an embodiment of the application. The front axle, which is not shown, can be connected to the electric axle drive 1 of the first rear axle 2 via the output 14. The second rear axle 2 has its own electric axle drive 1, which is configured according to an embodiment of the application in this embodiment. Figure lb or Figure 2b The further output 14.1 of the electric axle drive 1 of the first rear axle 2 is mechanically connected according to an embodiment in combination with Figure la or 2a. The output 14 of the electric axle drive 1 of the second rear axle 2 can be mechanically connected according to an embodiment in combination with Figure 3c or 4d. In this embodiment, a further output 14.1 is provided here at the transmission output 10 of the electric axle drive 1 of the first rear axle 2. The bevel gear 15 meshes with the further output 14.1, which can be connected to the further bevel gear 15 in a rotationally fixed manner via the shift device 16 and the shaft 56. The further bevel gear 15, in turn, meshes with the output 14 of the electric axle drive 1 of the second rear axle 2.

[0043] Figure 5b An electric drive assembly 100 according to a further embodiment of the application is shown. Figure 5b The drive assembly 100 according to an embodiment of the application is configured as a rear-wheel drive assembly. The first electric rear axle 2 and the second electric rear axle 2 here each have their own electric drive device. Here, the electric axle drive 1 for the first rear axle 2 and the electric axle drive 1 for the second rear axle 2 are configured according to an embodiment of the application. Figure 5a The drive assembly 100 according to an embodiment of the application is configured as a rear-wheel drive assembly. The first electric rear axle 2 and the second electric rear axle 2 here each have their own electric drive device. Here, the electric axle drive 1 for the first rear axle 2 and the electric axle drive 1 for the second rear axle 2 are configured according to an embodiment of the application. Figure 4d The drive assembly 100 according to an embodiment of the application is configured as a rear-wheel drive assembly. The first electric rear axle 2 and the second electric rear axle 2 here each have their own electric drive device. Here, the electric axle drive 1 for the first rear axle 2 and the electric axle drive 1 for the second rear axle 2 are configured according to an embodiment of the application. Figure 4d The drive assembly 100 according to an embodiment of the application is configured as a rear-wheel drive assembly. The first electric rear axle 2 and the second electric rear axle 2 here each have their own electric drive device. Here, the electric axle drive 1 for the first rear axle 2 and the electric axle drive 1 for the second rear axle 2 are configured according to an embodiment of the application.

[0044] Figure 5c An electric drive assembly 100 according to a further embodiment of the application is shown. Figure 5cThe drive assembly 100 of the embodiment is a rear-wheel drive assembly and comprises a first axle 2 with its own electric axle drive 1. The electric drive assembly 1 is configured for driving the first rear axle 2. The electric axle drives 1 for the first rear axle 2 and the second rear axle 50 are configured according to the embodiments in conjunction with Figure 4b the embodiment and can be mechanically coupled to one another by means of a gearshift 16. Reference is made to the respective embodiments relating to this embodiment. Furthermore, a front axle, not shown, can be mechanically operatively connected to the output 14 of the electric axle drive 1 of the first rear axle 2 by means of a bevel gear 15.

[0045] List of reference signs

[0046] 1 electric axle drive

[0047] 2 axle

[0048] 3, 4 axle section

[0049] 5 transverse differential

[0050] 6 wheel

[0051] 7 electric drive

[0052] 7.1, 7.2 electric motor

[0053] 8, 8' transmission

[0054] 9, 9.1, 9.2 transmission input

[0055] 10 transmission output

[0056] 11, 26' differential housing

[0057] 12, 12' planetary gearset

[0058] 13, 13' gearshift

[0059] 14, 14.1 output

[0060] 15 bevel pinion

[0061] 16 gearshift

[0062] 17, 25, 25' differential lock

[0063] 20, 20' longitudinal differential

[0064] 21 sun gear

[0065] 22 planet carrier

[0066] 23 planet gear

[0067] 24 ring gear

[0068] 26 planetary stage

[0069] 27', 28', 29' pinion

[0070] 50 second, third axle

[0071] 51, 52 axle section of the second, third axle

[0072] 53 transverse differential of the second, third axle

[0073] 54 differential housing of the second, third axle

[0074] 55 crown wheel of the second, third axle

[0075] 56 shaft

[0076] 100 electric drive assembly

Claims

1. Electric axle drive (1) for a vehicle, characterized in that The electric axle drive has a first axle for mounting wheels (6), an electric drive for driving the first axle, and an output for mechanically coupling a second axle for mounting wheels (6), wherein the electric axle drive (1) is configured to drive the second axle via the output in addition to driving the first axle using the electric drive.

2. The electric axle drive (1) according to claim 1, characterized in that The first axle has a first axle section (3) for mounting a first wheel, a second axle section (4) for mounting a second wheel, and a transverse differential (5) in mechanical action connection with the first and second axle sections for rotational speed compensation between the axle sections.

3. The electric vehicle axle drive (1) according to claim 1 or 2, characterized in that The electric axle drive (1) has a transmission (8; 8') with a plurality of gears for driving the first axle and the second axle using different gear ratios.

4. The electric vehicle axle drive (1) according to claim 1 or 2, characterized in that The electric drive has a single electric motor or a plurality of electric motors for driving the first and second axles.

5. The electric vehicle axle drive (1) according to claim 1 or 2, characterized in that The axle drive (1) has a further output for mechanically coupling a third axle for mounting wheels (6), wherein the electric axle drive (1) is configured to drive the third axle via the further output using the electric drive of the first axle.

6. The electric vehicle axle drive (1) according to claim 1 or 2, characterized in that The electric axle drive (1) has a longitudinal differential for rotational speed compensation between the first axle and the second axle.

7. The electric vehicle axle drive (1) according to claim 6, characterized in that The longitudinal differential is configured as at least one of a planetary gear differential (20) and a bevel gear differential (20').

8. An electric drive assembly (100), characterized by The electric drive assembly has an electric axle drive (1) according to claim 6 or 7 and a second axle, wherein the second axle can be driven by the electric drive, the longitudinal differential, and the output of the first axle.

9. An electric drive assembly (100), characterized by The electric drive assembly has two electric axle drives (1) according to any one of claims 1 to 5, wherein torque can be transmitted between the outputs of the axle drives (1).

10. Vehicle, characterized in that The vehicle has an electric drive assembly (100) according to any one of claims 8 and 9.

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