Distribution device for distributing drive power to vehicle wheels with a redistribution device and electric axle drive device for driving vehicle wheels

Abstract

Distribution device (1) for distributing drive power to several vehicle wheels (F1, F2) of an electric vehicle comprising: - a power input (2) which is connected to an electric drive (40), - a first and a second power output (3, 4) connected to vehicle wheels (F1, F2), - a distribution gear stage (5) for splitting and distributing a drive power from the power input (2) to the first and second power output (3, 4), - a transmission gear stage (6) for transferring drive power from the distribution gear stage (5) to the second power output (4), - a controllable redistribution device (7) for redistributing drive power from the first power output (3) to the second power output (4) or vice versa, - wherein the redistribution device (7) is connected to the distribution gear stage (5) and to the transmission gear stage (6) in order to selectively increase and / or decrease drive power at the first power output (3) and / or at the second power output (4).

Description

[0001] The invention relates to a distribution device for distributing drive power to several vehicle wheels of an electric vehicle and to an electric axle drive device for driving several vehicle wheels of an electric vehicle.

[0002] Electrically powered vehicles are known from the prior art, which have an electric motor for driving two vehicle wheels. In these vehicles, the electric motor is usually connected to a differential or a distribution device in order to drive, for example, two vehicle wheels with a single electric motor.

[0003] Such a differential has two planetary gear sets. A first planetary gear set for distributing power to a first and a second vehicle wheel, with the first planetary gear set being connected to the first vehicle wheel, and a second planetary gear set, which is connected to the second vehicle wheel, for transmitting power from the first planetary gear set to the second vehicle wheel.

[0004] A disadvantage of the aforementioned differential is that it cannot, for example, take into account or compensate for differences in friction between two vehicle wheels on one vehicle axle.

[0005] Against this background, the object of the present invention is to provide a distribution device for distributing drive power to several vehicle wheels of an electric vehicle and an axle drive device for driving several vehicle wheels of an electric vehicle, with which friction differences on two vehicle wheels of a vehicle axle can be taken into account and / or compensated.

[0006] DE 10 2021 208 546 B3 discloses a drive train for a vehicle which includes a transmission with an integral differential consisting of a planetary gear set and a spur gear set as well as a torque vectoring superposition unit, whereby the drive torque can be distributed and specifically influenced between two output shafts and according to the vehicle wheels.

[0007] This problem is solved by the features of the independent patent claims. Further advantageous developments are the subject of the dependent claims.

[0008] According to the invention, a first aspect of the present invention comprises a distribution device for distributing drive power to several vehicle wheels of an electric vehicle.

[0009] The distribution device includes a power input which can be connected to an electric drive, as well as a first and a second power output which can be connected to vehicle wheels.

[0010] Furthermore, the distribution device includes a distribution gear stage for splitting and distributing drive power from the power input to the first and second power outputs. The distribution gear stage can be designed to deliver power to a vehicle wheel, or to a first vehicle wheel, without the need for an intermediate gear. The distribution gear stage may, for example, consist solely of a planetary gear set.

[0011] In addition, the distribution device includes a transmission gear stage for transferring drive power from the distribution gear stage to the second power output.

[0012] Furthermore, the distribution device includes a redistribution unit or a controllable redistribution unit for redistributing drive power from the first power output to the second power output or vice versa. The redistribution unit can be controlled by a control unit for an electric machine or electric motor that the redistribution unit may include. For this purpose, for example, the direction of rotation or the rotational speed and / or the torque can be set via a control unit that can control the electric motor.

[0013] The redistribution device is connected to the distribution gear stage and the transmission gear stage in order to selectively increase and / or decrease drive power, for example an incoming torque, e.g. incoming at the power input, at the first power output and / or at the second power output.

[0014] The redistribution of drive power from the first power output to the second power output or vice versa can be controlled by means of the direction of rotation of an electric motor of the redistribution device as well as with its rotational speed.

[0015] The distribution device can be designed for an electric axle drive system with a single electric drive. The basic function of the redistribution mechanism of the distribution device is also known as torque vectoring (variable torque distribution between two vehicle wheels), which can be generated, for example, by a planetary mechanism that can be connected to the two power outputs of the distribution device and / or to the two gear stages (transfer gear stage, transmission gear stage).

[0016] The redistribution device can have a first sub-gearbox which is connected to the first power output for the transmission of rotational energy. The first sub-gearbox can also be connected, e.g., exclusively, to the distribution gear stage or its planetary carrier, or be engaged, meshed, or connected for the transmission of rotational energy.

[0017] The first sub-gearbox can comprise a sun gear, a ring gear, a planet carrier, and planets, whereby the planets can mesh with the sun gear and the ring gear. The sun gear can also be rotationally fixed to the first power output or to a first planet carrier of a first planetary gear set in the distribution gear stage. Furthermore, the sun gear can be rotatably mounted on the planet carrier and mesh with both the planets and a first planet carrier of a first planetary gear set in the distribution gear stage.

[0018] Furthermore, the redistribution device can include an electric motor. The ring gear of the first sub-gearbox can mesh with a drive shaft of the electric motor. Thus, the electric motor can influence the torque distribution of the distribution device through its generated torque and / or through the direction and speed of rotation of its drive shaft.

[0019] The electric motor of the redistribution device, or the redistribution device itself in its function as a torque vectoring mechanism, can activate when one of the vehicle's wheels slips or, for example, when there is relative movement between the right and left wheels. This solution improves the suitability of an electric vehicle for agile or dynamic driving. Simultaneously, it optimizes the vehicle's stability along the desired trajectory.

[0020] Furthermore, the redistribution unit can have a second sub-gearbox, which is connected to the second power output for angular energy transmission. The second sub-gearbox can be connected, for example, exclusively to the transmission stage or its second ring gear or its second sun gear, or be engaged, meshed, or connected for angular energy transmission. However, it is also possible for the second sub-gearbox to be connected, meshed, or connected for angular energy transmission to both the transmission stage and the distribution stage. In this case, the second sub-gearbox or its sun gear can be connected to a second ring gear of the transmission stage and to a first ring gear of the distribution stage. Alternatively, the second sub-gearbox or its sun gear can be connected to a second sun gear of the transmission stage and to a first ring gear of the distribution stage.

[0021] The second sub-gearbox can include a sun gear, a ring gear, a planet carrier and planets, wherein the sun gear of the second sub-gearbox can be connected to the second power output, e.g. in a rotationally fixed manner.

[0022] The sun gear of the second sub-gearbox can be non-rotatably connected to a second ring gear of a second planetary gear set in the transmission stage. Alternatively, the sun gear of the second sub-gearbox can be non-rotatably connected to a second sun gear of a second planetary gear set in the transmission stage. Furthermore, the sun gear of the second sub-gearbox can be non-rotatably connected to a first ring gear of a first planetary gear set in the distribution stage. Thus, the redistribution device can act on the transmission stage and / or the distribution stage to selectively add or remove torques and / or speeds from the transmission stage and / or the distribution stage, or to shift or redistribute them from one stage to another.

[0023] Furthermore, the planets of the first and second sub-gearboxes of the redistribution device can share a common axis of rotation. That is, the planets can share a planet carrier.

[0024] The ring gear of the second sub-gearbox can be arranged in a rotationally fixed manner on a housing of an axle drive device.

[0025] The planet carriers of the first and second sub-gearboxes can be rotationally fixed to each other or formed as a single unit. This allows torques and speeds to be transmitted from one sub-gearbox to the other.

[0026] The planets of the first and second sub-gearboxes can also have a common axis of rotation.

[0027] Furthermore, the transfer case stage can include a first gear or a first planetary gear. The first planetary gear can comprise a first sun gear, first planets, a first planet carrier, and a first ring gear.

[0028] The first sun gear can be fixedly connected to the power input or formed as a single piece. Furthermore, the first planet carrier can be fixedly connected to the first power output. In this case, the first planet carrier can function as the first power output.

[0029] Furthermore, the first ring gear can be non-rotatably connected to the transmission stage. This allows the transfer stage to transmit torque and / or speed to the transmission stage.

[0030] Furthermore, the first planet carrier can be rotationally fixed to a sun gear of a first sub-gearbox of the redistribution unit. Alternatively, the sun gear of a first sub-gearbox of the redistribution unit can be rotatably mounted on the planet carrier of the first sub-gearbox and be engaged with, or mesh with, both the planets of the first sub-gearbox and with a first planet carrier of a first planetary gearset of the distribution gear stage.

[0031] Furthermore, it may be provided that the first planets mesh or engage with the first ring gear and the first sun gear.

[0032] It is also possible that the first ring gear is rotationally fixed to a second sun gear of a second planetary gear set in the transmission gear stage.

[0033] Furthermore, it is possible that the first ring gear can be rotationally fixed to a second ring gear of a second planetary gear set in the transmission gear stage.

[0034] The first ring gear can also be non-rotatably connected to a sun gear of a second partial gearbox of the redistribution device.

[0035] It is also conceivable that the first ring gear can be rotationally fixed to a second sun gear of a second planetary gear set in the transmission gear stage.

[0036] Furthermore, the transmission stage can include a second gearbox or a second planetary gearbox. The second planetary gearbox can have a second sun gear, second planets, a second planet carrier, and a second ring gear.

[0037] In this case, the second planetary gear can be connected to the redistribution device and to the distribution gear stage.

[0038] The second sun gear can be non-rotatably connected to a first ring gear of a first planetary gear set of the distribution gear stage.

[0039] Alternatively, the second sun wheel can be connected to a housing of an axle drive device in a rotationally fixed manner.

[0040] In another alternative, the second sun wheel can be connected to the second power output in a rotationally fixed manner.

[0041] The second planet carrier can be connected to a housing of an axle drive device in a rotationally fixed manner, so that the second planets are stationary and, for example, only rotatable around themselves.

[0042] Furthermore, it is conceivable that the second planet carrier is rotationally fixed to the second power output.

[0043] Furthermore, it is possible that the second ring gear is connected to the second power output in a rotationally fixed manner.

[0044] The second ring gear can also be non-rotatably connected to a sun gear of a second sub-gearbox of the distribution unit. Alternatively, the second ring gear can be non-rotatably connected to a first ring gear of a first planetary gear set of the distribution gear stage.

[0045] The second ring gear can function as a second power output.

[0046] Furthermore, the second planets can mesh with or engage with the second ring gear and the second sun gear.

[0047] The second sun gear can also be non-rotatably connected to the first ring gear of a first planetary gear set of a distribution gear stage of the distribution device.

[0048] Furthermore, it is conceivable that the second sun gear is rotationally fixed to the sun gear of a second sub-gearbox of the redistribution device.

[0049] Furthermore, a ring gear, or any ring gear mentioned in this description, can have internal teeth.

[0050] A sun wheel / any sun wheel mentioned in this description and / or planets / any planets mentioned in this description can each have external teeth.

[0051] The distribution device can be designed as a cohesive assembly that can be used as a whole or as a part in a vehicle.

[0052] Furthermore, the distribution device can be designed as a rolling differential. Additionally, the distribution device can be a spur gear differential or be designed as such.

[0053] Furthermore, the first and second power outputs can each be formed by a shaft or an axis, which can be aligned in the same orientation relative to each other. The first and second power outputs can be coaxially aligned.

[0054] Furthermore, if a reversal of the direction of rotation is desired for the transmission or distribution gear stage, an additional gear (not shown) can be inserted into the transmission or distribution gear stage. The additional gear can be designed accordingly, depending on whether a change in the gear ratio is desired or not.

[0055] A second aspect of the present invention comprises an electric axle drive device for driving several vehicle wheels of an electric vehicle.

[0056] It is expressly pointed out that the features of the distribution device, as mentioned under the first aspect, can be used individually or in combination with each other in the electric axle drive device.

[0057] In other words, the features relating to the distribution device mentioned above under the first aspect of the invention can also be combined with further features under the second aspect of the invention.

[0058] An electric axle drive device for driving several vehicle wheels of an electric vehicle includes a distribution device according to the first aspect.

[0059] Furthermore, the electric axle drive device comprises at least one electric drive or electric motor arranged coaxially to the first and / or second power output of the distribution device. A shaft of the at least one electric drive can form the power input of the distribution device.

[0060] Furthermore, a shaft of the at least one electric drive can be non-rotatably connected to a first sun gear of a first planetary gear set in the distribution gear stage of the distribution device, or it can be formed as a single unit. Thus, the electric drive can easily provide a power input for the distribution device.

[0061] Furthermore, the electric axle drive device can have a housing in which the distribution device is arranged and / or which surrounds or encloses the distribution device. This allows for simple lubrication.

[0062] Furthermore, the axle drive device can be designed as a coherent assembly that can be used as a whole or as a part in a vehicle.

[0063] Finally, it should be noted that integrally joined parts of gearboxes can alternatively be connected to each other in a rotationally fixed manner.

[0064] The invention is explained in more detail below with reference to exemplary embodiments in conjunction with the accompanying drawings. These schematically show: Fig. 1 a schematic side view of an electric axle drive device according to the invention for driving several vehicle wheels according to a first embodiment; Fig. 2 a schematic side view of an electric axle drive device according to the invention for driving several vehicle wheels according to a second embodiment; Fig. 3 a schematic side view of an electric axle drive device according to the invention for driving several vehicle wheels according to a third embodiment; and Fig. 4 a schematic side view of an electric axle drive device according to the invention for driving several vehicle wheels according to a fourth embodiment.

[0065] In the following description, the same reference symbols are used for the same objects.

[0066] Fig. Figure 1 shows a side view of an electric axle drive device 50 according to the invention for driving several vehicle wheels F1, F2 according to a first embodiment. According to one implementation variant, the axle drive device 1 can be designed as a coherent assembly that can be installed in a vehicle as a whole or as a part.

[0067] A more detailed illustration shows Fig. 1, that the electric axle drive device 50 comprises a distribution device 1 and an electric drive 40 or an electric motor, which is arranged coaxially to a first power output 3 of the distribution device 1.

[0068] In this case, a shaft of the electric drive 40 forms a power input 2 of the distribution device 1, wherein the shaft of the electric drive 40 is non-rotatably connected or integrally formed with a first sun gear 21 of a first planetary gear 20 of a distribution gear stage 5 of the distribution device 1.

[0069] Furthermore, the electric axle drive device 50 has a housing G in which the distribution device 1 is arranged or which surrounds the distribution device 1. This makes lubrication possible in a simple manner.

[0070] Furthermore, it shows Fig. 1 a distribution device 1 for distributing drive power to several vehicle wheels F1, F2 of an electric vehicle.

[0071] The distribution device 1 has - as already mentioned - a power input 2, which is connected to the electric drive 40, as well as a first and a second power output 3, 4, which is connected to vehicle wheels F1, F2.

[0072] Furthermore, it shows Fig. 1, that the distribution device 1 comprises a distribution gear stage 5 for branching and distributing a drive power from the power input 2 to the first and second power output 3, 4.

[0073] The distribution device 1 also has a transmission gear stage 6 for transferring drive power from the distribution gear stage 5 to the second power output 4.

[0074] Furthermore, it is assumed that Fig. 1 shows that the distribution device 1 has a controllable redistribution device 7 for redistributing drive power from the first power output 3 to the second power output 4 or vice versa.

[0075] The redistribution device 7 is connected to the distribution gear stage 5 and the transmission gear stage 6 in order to selectively increase and / or decrease the drive power at the first power output 3 and / or at the second power output 4. The distribution of the drive power can be controlled by means of the direction of rotation of a drive shaft 14 of an electric motor 13 of the redistribution device 7 and its rotational speed.

[0076] Furthermore, it shows Fig. 1, that the redistribution device 7 has a first sub-gearbox 8 which is connected to the first power output 3 in a rotational energy-transmitting manner.

[0077] Specifically, the first partial gear unit 8 has a sun gear 9, a ring gear 10, a planet carrier 11 and planets 12, wherein the planets 12 are in engagement or meshing with the sun gear 9 and the ring gear 10.

[0078] Furthermore, the sun gear 9 is non-rotatably connected to the first power output 3 or to a first planet carrier 23 of a first planetary gear 20 of the distribution gear stage 5.

[0079] As already mentioned, the redistribution device 7 has an electric motor 13, with the ring gear 10 meshing with a drive shaft 14 of the electric motor 13. The speed and direction of rotation of the drive shaft 14 control the distribution of the drive power within the distribution device 1.

[0080] Furthermore, it shows Fig. 1, that the redistribution device 7 has a second sub-gearbox 15 which is connected to the second power output 4 in a rotational energy-transmitting manner.

[0081] The second sub-gearbox 15 has a sun gear 16, a ring gear 17, a planet carrier 18 and planets 19, wherein the sun gear 16 is non-rotatably connected to the second power output 4.

[0082] Furthermore, the sun gear 16 of the second partial gear set 15 is non-rotatably connected to a second ring gear 29 of a second planetary gear set 25 of the transmission gear stage 6.

[0083] Furthermore, the ring gear 17 of the second sub-gearbox 15 is arranged in a rotationally fixed manner on the housing G of the axle drive device 50.

[0084] The planet carriers 11, 18 of the first and second partial gear sets 8, 15 are according to Fig. 1 connected to each other in a rotationally fixed manner or formed in one piece, wherein the planets 12, 19 of the first and the second partial gear unit 8, 15 have a common axis of rotation.

[0085] As already indicated, the distribution gear stage 5 has a first planetary gear 20, which includes a first sun gear 21, first planets 22, a first planet carrier 23 and a first ring gear 24.

[0086] The first sun gear 21 is connected to the power input 2 in a rotationally fixed manner or is formed in one piece, with the first planet carrier 23 being connected to the first power output 3 in a rotationally fixed manner.

[0087] Furthermore, according to Fig. 1 the first planet carrier 23 is non-rotatably connected to the sun gear 9 of the first partial gearing 8 of the redistribution device 7, wherein the first planets 22 mesh or are engaged with the first ring gear 24 and with the first sun gear 21.

[0088] Furthermore, the first ring gear 24 is non-rotatably connected to the transmission gear stage 6, wherein the first ring gear 24 is non-rotatably connected to a second sun gear 26 of a second planetary gear 25 of the transmission gear stage 6.

[0089] As already mentioned, the transmission gear stage 6 has a second planetary gear 25, which has a second sun gear 26, second planets 27, a second planet carrier 28 and a second ring gear 29.

[0090] The second sun gear 26 is non-rotatably connected to the first ring gear 24 of the first planetary gear 20 of the distribution gear stage 5, with the second planet carrier 28 being non-rotatably connected to the housing G, so that the second planets 27 are stationary and can only be rotated about themselves.

[0091] Furthermore, it shows Fig. 1, that the second ring gear 29 is connected to the second power output 4 in a rotationally fixed manner, wherein the second ring gear 29 is also connected to the sun gear 16 of the second partial gearbox 15 of the redistribution device 7 in a rotationally fixed manner.

[0092] Furthermore, comb or are according to Fig. 1 the second planets 27 engage with the second ring gear 29 and with the second sun gear 26.

[0093] Finally, regarding the first embodiment, it should be noted that all the ring gears shown have internal teeth and all the sun gears and planets shown have external teeth.

[0094] According to one implementation variant, the distribution device 1 can be designed as a coherent assembly that can be used as a whole or as a part in a vehicle.

[0095] With regard to Fig. It is evident from Figure 1 that the distribution device 1 is designed as a rolling differential or that the distribution device 1 is a spur gear differential.

[0096] The first and second power outputs 3, 4 are each formed by a shaft or by an axis that are aligned in the same orientation to each other, with the first and second power outputs 3, 4 being coaxially aligned.

[0097] Fig. Figure 2 shows a schematic side view of an electric axle drive device 50 according to the invention for driving several vehicle wheels F1, F2 according to a second embodiment. Here too, the axle drive device 1 can be designed as a coherent assembly according to one implementation variant, which can be used as a whole or as a part in a vehicle.

[0098] In Fig. Figure 2 shows that the electric axle drive device 50 comprises a distribution device 1 and an electric drive 40 or an electric motor, which is arranged coaxially to a first power output 3 of the distribution device 1.

[0099] In this case, a shaft of the electric drive 40 forms a power input 2 of the distribution device 1, wherein the shaft of the electric drive 40 is non-rotatably connected or integrally formed with a first sun gear 21 of a first planetary gear 20 of a distribution gear stage 5 of the distribution device 1.

[0100] Furthermore, the electric axle drive device 50 has a housing G in which the distribution device 1 is arranged or which surrounds the distribution device 1. This makes lubrication possible in a simple manner.

[0101] Furthermore, it shows Fig. 2 a distribution device 1 for distributing a drive power to several vehicle wheels F1, F2 of an electric vehicle.

[0102] The distribution device 1 has a power input 2, which is connected to the electric drive 40, as well as a first and a second power output 3, 4, which is connected to vehicle wheels F1, F2.

[0103] Furthermore, it shows Fig. 2, that the distribution device 1 comprises a distribution gear stage 5 for branching and distributing a drive power from the power input 2 to the first and second power output 3, 4.

[0104] The distribution device 1 also has a transmission gear stage 6 for transferring drive power from the distribution gear stage 5 to the second power output 4.

[0105] Furthermore, it is assumed that Fig. 2 shows that the distribution device 1 has a controllable redistribution device 7 for redistributing drive power from the first power output 3 to the second power output 4 or vice versa.

[0106] The redistribution device 7 is connected to the distribution gear stage 5 and the transmission gear stage 6 in order to selectively increase and / or decrease the drive power at the first power output 3 and / or at the second power output 4. The distribution of the drive power can be controlled by means of the direction of rotation of a drive shaft 14 of an electric motor 13 of the redistribution device 7 and its rotational speed.

[0107] Regarding the further explanations, to avoid unnecessary repetition, reference is made to the first exemplary embodiment. Fig. 1 referenced, which are applicable here by analogy.

[0108] Therefore, only the differences between the first and second embodiments will be discussed below.

[0109] This shows Fig. 2, how Fig. 1, that the redistribution device 7 has a first sub-gearbox 8 and a second sub-gearbox 15. The sub-gearboxes 8, 14 are arranged with regard to Fig. 1 and Fig. 2 identical in terms of their sun gears, planets, planet carriers and ring gears.

[0110] Unlike Fig. 1 is the sun gear 16 of the second partial gear set 15 in Fig. 2 additionally connected in a rotationally fixed manner to a first ring gear 24 of a first planetary gear 20 of the distribution gear stage 5.

[0111] Likewise, as in Fig. 1 shows Fig. 2, that the distribution gear stage 5 has a first planetary gear 20 and the transmission gear stage 6 has a second planetary gear 25. The construction of the two planetary gears 20, 25 is identical to those from Fig. 1.

[0112] However, in Fig. 2 the first ring gear 24 of the first planetary gear 20 of the distribution gear stage 5 is connected to the second ring gear 29 of the second planetary gear 25 of the transmission gear stage 6 in a rotationally fixed manner.

[0113] Furthermore, the first ring gear 24 of the first planetary gear 20 of the distribution gear stage 5 is non-rotatably connected to the sun gear 16 of the second sub-gearbox 15 of the redistribution device 7.

[0114] The second ring gear 29 of the second planetary gear 25 of the transmission gear stage 6 is also non-rotatably connected to the first ring gear 24 of the first planetary gear 20 of the distribution gear stage 5.

[0115] Furthermore, it is another difference to Fig. 1, that the second sun gear 26 of the second planetary gear 25 of the transmission gear stage 6 is connected to the second power output 4 in a rotationally fixed manner.

[0116] In the second embodiment, it is also the case that all the ring gears shown have internal teeth and all the sun gears and planets shown have external teeth.

[0117] According to one implementation variant, the distribution device 1 can be designed as a coherent assembly that can be used as a whole or as a part in a vehicle.

[0118] Finally, it should be noted that if a reversal of the direction of rotation is desired with regard to the transmission gear stage 6 or the distribution gear stage 5, an additional gear (not shown) can be inserted into the transmission gear stage 6 or the distribution gear stage 5.

[0119] Fig. Figure 3 shows a schematic side view of an electric axle drive device 40 according to the invention for driving several vehicle wheels F1, F2 according to a third embodiment.

[0120] For the sake of simplicity and brevity, regarding Fig. 3. Regarding the explanations Fig. 2 or reference is made to the second embodiment, which are applicable here by analogy.

[0121] Therefore, only the differences between the second and third embodiments will be discussed below.

[0122] First, when comparing the Fig. 2 and Fig. 3. It should be noted that the third embodiment is in Fig. 3 from the second embodiment according to Fig. 2 differs with regard to the second planetary gear 25 of the transmission gear stage 6.

[0123] Thus, unlike Fig. 2 and the second embodiment shown here in Fig. 3 the second sun gear 26 of the second planetary gear 25 is connected non-rotatably to the housing G of the axle drive device 1, wherein the second planet carrier 28 is connected non-rotatably to the second power output 4.

[0124] As already mentioned, further details will be provided in the second embodiment. Fig. 2 referenced, which are applicable here by analogy.

[0125] Finally, it should be noted that if a reversal of the direction of rotation is desired with regard to the transmission gear stage 6 or the distribution gear stage 5, an additional gear (not shown) can be inserted into the transmission gear stage 6 or the distribution gear stage 5.

[0126] Fig. Figure 4 shows a schematic side view of an electric axle drive device 50 according to the invention for driving several vehicle wheels F1, F2 according to a fourth embodiment.

[0127] For the sake of simplicity and brevity, regarding Fig. 4. Regarding the explanations on Fig. 1 or reference is made to the first embodiment, which are applicable here by analogy.

[0128] Therefore, only the differences between the first and fourth embodiments will be discussed below.

[0129] First, when comparing the Fig. 1 and Fig. 4. It should be noted that the fourth embodiment is in Fig. 4 from the first embodiment according to Fig. 1 differs with regard to the first partial gearbox 8 of the redistribution device 7.

[0130] Because according to Fig. 4 is the sun gear 9 of the first partial gear 8 rotatably attached to the planet carrier 11 and meshes with both the planets 12 and the first planet carrier 23 of the first planetary gear 20 of the distribution gear stage 5.

[0131] Furthermore, the first and fourth embodiments differ with regard to the connection of the second partial gearbox 15 of the redistribution device 7 with the first planetary gearbox 20 of the distribution gearbox stage 5 and with the second planetary gearbox 25 of the transmission gearbox stage 6.

[0132] Thus, the sun gear 16 of the second partial gearbox 15 of the redistribution device 7 is non-rotatably connected to the second sun gear 26 of the second planetary gearbox 25 of the transmission gearbox stage 6.

[0133] Likewise, the first ring gear 24 of the first planetary gear 20 of the distribution gear stage 5 is non-rotatably connected to the second sun gear 26 of the second planetary gear 25 of the transmission gear stage 6.

[0134] Furthermore, the second ring gear 29 of the second planetary gear set 25 is non-rotatably connected to the second power output 4, as shown in Fig. 1 and Fig. 4 shown.

[0135] As already mentioned, further explanations refer to the first embodiment. Fig. 1 referenced, which are applicable here by analogy. Reference symbol list 1 distribution device 2 Power input 3 first power output 4 second power output 5th transfer case stage 6th transmission gear stage 7 Redistribution device 8 first sub-transmission 9 Sun wheel 10 Ring gear 11 planetary carriers 12 planets 13 electric motor 14 Drive shaft 15 second sub-transmission 16 sun wheel 17 Ring gear 18 planetary carriers 19 planets 20 first planetary gear 21 first sun wheel 22 first planets 23 first planetary carriers 24 first ring gear 25 second planetary gear 26 second sun wheel 27 second planets 28 second planetary carrier 29 second ring gear 40 electric drive 50 axle drive device G Housing F1 car wheel F2 vehicle wheel

Claims

[1] Distributing device (1) for distributing drive power to several vehicle wheels (F1, F2) of an electric vehicle: - a power input (2) which is connected to an electric drive (40), - a first and a second power output (3, 4) connected to vehicle wheels (F1, F2), - a distribution gear stage (5) for splitting and distributing a drive power from the power input (2) to the first and second power output (3, 4), - a transmission gear stage (6) for transferring drive power from the distribution gear stage (5) to the second power output (4), - a controllable redistribution device (7) for redistributing drive power from the first power output (3) to the second power output (4) or vice versa, - wherein the redistribution device (7) is connected to the distribution gear stage (5) and to the transmission gear stage (6) in order to selectively increase and / or decrease drive power at the first power output (3) and / or at the second power output (4). [2] Distribution device according to claim 1, - wherein the redistribution device (7) has a first partial gearbox (8) which is connected to the first power output (3) in a rotational energy transfer capacity, - wherein the first partial gear set (8) comprises a sun gear (9), a ring gear (10), a planet carrier (11) and planets (12), - wherein the redistribution device (7) has an electric motor (13), and - wherein the ring gear (10) meshes with a drive shaft (14) of the electric motor (13). [3] Distribution device according to claim 2, - wherein the sun gear (9) is non-rotatably connected to the first power output (3) or to a first planet carrier (23) of a first planetary gear set (20) of the distribution gear stage (5). [4] Distribution device according to one of the preceding claims, - wherein the redistribution device (7) has a second sub-gearbox (15) which is connected to the second power output (4) in a rotational energy-transmitting manner, - wherein the second partial gear set (15) comprises a sun gear (16), a ring gear (17), a planet carrier (18) and planets (19), and - wherein the planets (12, 19) of a first and of the second partial gear set (8, 15) have a common axis of rotation. [5] Distribution device according to claim 4, - wherein the sun gear (16) of the second sub-gearbox (15) is connected to the second power output (4), - wherein the sun gear (16) of the second partial gear set (15) is non-rotatably connected to a second ring gear (29) of a second planetary gear set (25) of the transmission gear stage (6), or - wherein the sun gear (16) of the second partial gear set (15) is non-rotatably connected to a second sun gear (26) of a second planetary gear set (25) of the transmission gear stage (6). [6] Distribution device according to one of the preceding claims, - wherein the distribution gear stage (5) comprises a first planetary gear set (20), - wherein the first planetary gear (20) comprises a first sun gear (21), first planets (22), a first planet carrier (23) and a first ring gear (24), - wherein the first sun wheel (21) is connected to the power input (2) in a rotationally fixed manner, - wherein the first planetary carrier (23) is rotationally fixed to the first power output (3), and - wherein the first ring gear (24) is non-rotatably connected to the transmission gear stage (6). [7] Distribution device according to claim 6, - wherein the first planet carrier (23) is non-rotatably connected to a sun gear (9) of a first partial gear unit (8) of the redistribution device (7). [8] Distribution device according to one of the preceding claims, - wherein the transmission gear stage (6) comprises a second planetary gear (25), - wherein the second planetary gear (25) comprises a second sun gear (26), second planets (27), a second planet carrier (28) and a second ring gear (29), and - wherein the second planetary gear (25) is connected to the redistribution device (7) and to the distribution gear stage (5). [9] Distribution device according to claim 8, - wherein the second ring gear (29) is non-rotatably connected to a sun gear (16) of a second partial gear set (15) of the redistribution device (7), or - wherein the second sun gear (26) is non-rotatably connected to the sun gear (16) of a second partial gear unit (15) of the redistribution device (7). [10] Electric axle drive device (40) for driving one or more vehicle wheels (F1, F2) of an electric vehicle: - a distribution device (1) according to one of the preceding claims, and - at least one electric drive (40) arranged coaxially to the first and / or second power output (3, 4), - wherein a shaft of the at least one electric drive (40) forms the power input (2) of the distribution device (1).

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