Distribution device for distributing drive power with a locking device and a stepped ring gear as well as an electric axle drive device

Abstract

Distribution device (1) for distributing drive power to several vehicle wheels (F1, F2) of an electric vehicle comprising: - a power input (2) which can be connected to a drive (30), - a first and a second power output (3, 4) that can be 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 transmitting drive power, - wherein the transmission gear stage (6) has a stepped ring gear (7), characterized in that the transmission gear stage (6) is designed to transmit drive power from the distribution gear stage (5) to the second power output (4), wherein the distribution device (1) has a locking device (18) with which the first and second power outputs (3, 4) can be at least partially connected to each other and completely disconnected from each other in order to equalize speed and torque between the first and second power outputs (3, 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 the vehicle wheels. Typically, an electric motor is connected to a differential or a distribution device to drive, for example, two vehicle wheels with one electric motor. Such a differential has two planetary gear sets. One is 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 the other is for transmitting power from the first planetary gear set to the second vehicle wheel.

[0003] DE 10 2016 216 804 A1 discloses a drive device for a motor vehicle with a drive engine which is operatively connected via a drive shaft to a transmission device comprising a Wolfrom transmission and a differential transmission, wherein the differential transmission comprises a first and a second planetary gear set with several planet gears, wherein each planet gear of the first planetary gear set is in tooth mesh with a first ring gear and a respective planet gear of the second planetary gear set, wherein each planet gear of the second planetary gear set is in tooth mesh with a first sun gear and a respective planet gear of the first planetary gear set, wherein the first sun gear set is rotationally fixed to a first output shaft, and wherein the planet gears of the two planetary gear sets are rotatably mounted on a first planet carrier, wherein the first planet carrier is rotationally fixed to a second output shaft.furthermore, the Wolfrom gear unit comprises at least one set of stepped planetary gears with several stepped planetary gears rotatably mounted on a second planet carrier, each stepped planetary gear having a first and a second stepped gear connected to each other in a rotationally fixed manner, the first stepped gear of the stepped planetary gears being in tooth mesh with a second sun gear and a second ring gear, the second stepped gear of the stepped planetary gears being in tooth mesh with a third ring gear, and the first and the third ring gear being connected to each other in a rotationally fixed manner.

[0004] Against this background, the object of the present invention is to increase the range of an electrically powered vehicle and to improve the efficiency of the combination of an electric motor with a differential.

[0005] This problem is solved by the features of the independent patent claims. Further advantageous developments are the subject of the dependent claims.

[0006] According to the invention, a first aspect of the present invention comprises a distribution device for distributing drive power to several wheels of an electric vehicle. The distribution device can be used to distribute an incoming torque, e.g., input at a power input, equally to two vehicle wheels or to two power outputs.

[0007] 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.

[0008] 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 without an additional intermediate gear. The distribution gear stage can, for example, consist solely of a planetary gear set.

[0009] In addition, the distribution device includes a transmission gear stage for transferring drive power from the distribution gear stage to the second power output.

[0010] Furthermore, the distribution device features a locking mechanism that allows the first and second power outputs to be at least partially connected and completely disconnected. This enables the speed and torque between the first and second power outputs to be equalized or independent. Additionally, speed and torque can be at least partially transferred directly from the first to the second power output, or vice versa. The locking mechanism, which can be positioned between the first and second power outputs, can achieve a locking effect of, for example, 20%, improving traction in the presence of friction differences. By coupling the two power outputs either fixed or variably, it is possible to transfer torque from the faster-rotating output to the slower-rotating output.

[0011] The locking device can be designed as a multi-plate clutch. This is a simple, lightweight, and proven design.

[0012] The locking device can also have first and second plates. The first plates can be rotationally fixed to the distribution gear stage, and the second plates can be rotationally fixed to the transmission gear stage. Furthermore, the first plates can be rotationally fixed to the first power output, and the second plates can be rotationally fixed to the second power output.

[0013] Furthermore, it is possible that the first lamellae are connected or arranged in a rotationally fixed manner to or on a planet carrier of a planetary gear of the distribution gear stage.

[0014] The second lamellae can be connected or arranged in a rotationally fixed manner to or on a spur gear of the transmission gear stage.

[0015] Furthermore, the first clutch plates can be slidably mounted, e.g., along the axis of rotation of a power output, on the first power output or on a planet carrier of a planetary gear set in the transfer stage, so that the first and second clutch plates can be engaged by axial displacement. Alternatively or additionally, the second clutch plates can be slidably mounted on the second power output or on a spur gear in the transmission stage, so that the first and second clutch plates can be engaged by axial displacement.

[0016] Furthermore, it is conceivable that the locking device – generally speaking – is designed as a friction-fit connection, such as with pre-tensioned friction discs or with lamellae.

[0017] Furthermore, the locking device can be designed as a claw coupling. This is also a simple and proven design. Thus, a positive-locking connection can be achieved.

[0018] Furthermore, the transmission stage features a stepped ring gear. This allows for an increase in the gear ratio in the distribution device or in a rolling differential beyond the limits of arrangements with two planetary gear sets, as provided for in prior art solutions. In addition, weight can be saved and the efficiency of an electric axle drive device improved.

[0019] In other words, the stepped ring gear can form an axle offset device to compensate for an axle offset between the first and second power outputs, for example, due to the transmission stage being a spur gear stage. Such an axle offset device may be necessary, for instance, if the transfer case stage is implemented as a planetary gear set or has a planetary gear set and the transmission stage is implemented as a spur gear stage. The axle offset device can direct drive power from the transmission stage to the second power output and thus to one or more vehicle wheels. The axle offset device formed by the stepped ring gear transmits the rotational speed and torque of the transmission stage to the second power output.The stepped ring gear allows the speed and / or torque from the transmission stage to be delivered unchanged or at a 1:1 ratio to the second power output. This allows mechanical losses to be taken into account and partially compensated for when selecting the gear ratio.

[0020] In other words, the distribution device or transmission stage can have a stepped ring gear to compensate for an offset or axis misalignment between the first and second power outputs. This is because, to create a common vehicle axle, the design of the transmission stage (e.g., a spur gear stage for driving one wheel) in combination with the distribution stage for driving another wheel may necessitate selecting the gear ratios for both wheels so that, for example, when driving straight ahead, the rotational speeds of the first and second power outputs are identical. In this scenario, the transmission stage and the distribution stage may have an axis misalignment, which must be compensated for by the axis misalignment device or the stepped ring gear.

[0021] A stepped ring gear can comprise a first ring gear and a second ring gear. The first and second ring gears can have different diameters. The pitch circle diameter of the second ring gear can also be larger than that of the first ring gear. The stepped ring gear can also be manufactured as a single piece.

[0022] Furthermore, the first ring gear can have internal teeth and / or a first pitch circle diameter. Additionally, the second ring gear can have internal teeth and / or a second pitch circle diameter. The first pitch circle diameter can be smaller than the second pitch circle diameter.

[0023] Furthermore, the transmission stage can be designed as a spur gear stage. In addition to the stepped ring gear, the transmission stage can include a spur gear. The spur gear can mesh with, or be in engagement with, the first ring gear of the stepped ring gear. The spur gear can have external teeth. The first ring gear of the stepped ring gear can have internal teeth. Thus, a spur gear stage can be designed, or a spur gear transmission with a spur gear and a first ring gear of the stepped ring gear can be realized. The axes of rotation of the spur gear and the stepped ring gear can be offset and / or spaced apart from each other. Compared to the prior art, which uses a planetary gear system at this point, this solution is lighter and more cost-effective because it has fewer components.

[0024] Furthermore, the distribution stage can include a planetary gear set. The planetary gear set can have a ring gear. The ring gear of the planetary gear set in the distribution stage and the stepped ring gear of the transmission stage, or the second ring gear of the stepped ring gear of the transmission stage, can be non-rotatably connected to each other or formed as a single unit. This very combination of ring gears results in a simple design for the distribution device and, at the same time, an optimized weight compared to prior art solutions.

[0025] The planetary gear set can include a sun gear, first planets, a planet carrier, and a ring gear. It can also include second and third planets. The first, second, and / or third planets can be rotatably mounted on the planet carrier. Furthermore, the first planets can, for example, simply mesh with or be engaged by the sun gear. Similarly, the second planets can, for example, simply mesh with or be engaged by the first or third planets.

[0026] Furthermore, the first and second planetary gears can be rotatable around a common axis of rotation and / or be fixedly connected to each other. The first and second planetary gears can form a stepped planetary gear set. The third planetary gears can mesh with or be engaged in contact with the second planetary gears and the ring gear. This configuration allows drive power to be distributed from the transfer case stage to a first vehicle wheel and to the transmission stage, and thus to a second vehicle wheel. More precisely, the transfer case stage allows power to be split between the planetary gear carrier and the ring gear that drives the transmission stage.

[0027] The first, second, and / or third planetary gears can have different and / or partially identical pitch circle diameters to generate a definable gear ratio. The pitch circle diameter of the first planetary gears can be larger than the pitch circle diameter of the second and / or third planetary gears. Similarly, the pitch circle diameter of the second planetary gears can be larger or smaller than the pitch circle diameter of the third planetary gears. Furthermore, the pitch circle diameters of the second and third planetary gears can be the same. In this way, the second and third planetary gears can be used to create an additional gear ratio within the planetary gear set of the transfer stage. This, in combination with the spur gear of the transmission stage, results in a weight-optimized solution for an electric axle drive device.

[0028] Furthermore, the sun gear can be non-rotatably connected to the power input or be formed in one piece.

[0029] The planetary carrier can also be rotationally fixed to the first power output. In this case, the planetary carrier can function as the first power output.

[0030] 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.

[0031] 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.

[0032] A second aspect of the present invention comprises an electric axle drive device for driving several vehicle wheels of an electric vehicle.

[0033] 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.

[0034] 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.

[0035] An electric axle drive device for driving several vehicle wheels of an electric vehicle includes a distribution device according to the first aspect.

[0036] 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.

[0037] Furthermore, a shaft of at least one electric drive can be non-rotatably connected to a sun gear of a planetary gearbox in the distribution 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.

[0038] The invention concept presented above is expressed again and in addition in other words below.

[0039] This idea, in simplified terms, concerns a rolling differential or a distribution device with a focus on the so-called E-axis.

[0040] Previously known rolling differentials or distribution devices are designed on the basis of two planetary gear sets or two planetary gearboxes and have limitations regarding the overall gear ratio.

[0041] To solve this problem, a second planetary gear set in the rolling differential can be replaced by a spur gear set with a stepped ring gear to increase the gear ratio. The coupling of a distribution gear stage of the distribution device with a transmission gear stage of the distribution device can be achieved via the stepped ring gear and an intermediate gear or another planet gear in the distribution gear stage, which, together with the stepped ring gear and the output spur gear or the spur gear of the transmission gear stage, can form an axial triangle.

[0042] Furthermore, it is a goal to improve traction when there are differences in friction between the vehicle wheels. A locking device can be used for this purpose. By means of the locking device, which can be arranged between two outputs or between two power outputs, a locking effect of, for example, 20% can be achieved, which improves traction when there are differences in friction. This is because, by fixed or variable coupling of the two power outputs, it is possible to transfer torque from the faster-rotating power output to the slower-rotating power output.

[0043] The invention is explained in more detail below with reference to an exemplary embodiment in conjunction with a drawing. The drawing schematically shows: Fig. 1 A schematic sectional view of an electric axle drive device according to the invention for driving several vehicle wheels.

[0044] Fig. Figure 1 shows a schematic sectional view of an electric axle drive device 40 according to the invention for driving several vehicle wheels F1, F2 of an electric vehicle.

[0045] A more detailed illustration shows Fig. 1, that the electric axle drive device 40 comprises a distribution device 1 and an electric drive 30 or an electric motor, which is arranged coaxially to a first power output 3 of the distribution device 1.

[0046] In this arrangement, a shaft of the electric drive 30 forms a power input 2 of the distribution device 1, wherein the shaft of the electric drive 30 is non-rotatably connected to a sun gear 12 of a planetary gear 10 of a distribution gear stage 5 of the distribution device 1 or is formed in one piece.

[0047] Furthermore, it shows Fig. 1 a distribution device 1 for distributing drive power to several vehicle wheels F1, F2 of an electric vehicle.

[0048] The distribution device 1 has a power input 2, which can be connected to the electric drive 30, as well as a first and a second power output 3, 4, which is connected to vehicle wheels F1, F2.

[0049] 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.

[0050] 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.

[0051] Furthermore, it is assumed that Fig. Figure 1 shows that the distribution device 1 has a locking device 18 with which the first and second power outputs 3, 4 can be at least partially connected to each other and completely disconnected from each other. This allows speed and torque to be transmitted at least partially directly from the first to the second power output 3, 4 or vice versa. By means of the locking device 18, which is arranged between the first and second power outputs 3, 4, a locking effect of, for example, 20% can be achieved, which improves traction in the presence of friction differences. This is because, by fixed or variable coupling of the two power outputs 3, 4, it is possible to transfer torque from the faster-rotating power output to the slower-rotating power output.

[0052] Furthermore, it shows Fig. 1, that the locking device 18 is designed as a multi-plate clutch, wherein the locking device 18 has first and second plates 19, 20.

[0053] The first lamellae 19 are non-rotatably connected to the distribution gear stage 5 and the second lamellae 20 are non-rotatably connected to the transmission gear stage 6.

[0054] More precisely, the first lamellae 19 are rotationally fixed to the first power output 3, and the second lamellae 20 are rotationally fixed to the second power output 4. Furthermore, the first lamellae 19 are rotationally fixed to a planet carrier 16 of a planetary gear 11 of the distribution gear stage 5, while the second lamellae 20 are rotationally fixed to a spur gear 10 of the transmission gear stage 6.

[0055] The first lamellae 19 are slidably attached to the first power output 3 or to a planet carrier 16 of a planetary gear 11 of the distribution gear stage 5, so that the first and second lamellae 19, 20 can be brought into engagement by an axial displacement.

[0056] Furthermore, it is assumed that Fig. Figure 1 shows that the transmission gear stage 6 has a stepped ring gear 7. This allows for an increase in the gear ratio in the distribution device 1 beyond the limits of the arrangement with two planetary gears (one for the distribution gear stage 5 and one for the transmission gear stage 6), as provided for in prior art solutions. Furthermore, weight can be saved and the efficiency of the electric axle drive device 40 improved.

[0057] In other words, the stepped ring gear 7 forms an axle offset device to compensate for an axle offset between the first and second power outputs 3, 4, resulting from the design of the transmission stage 6 as a spur gear stage. Such an axle offset device may be necessary, for example, if the distribution gear stage 5 is implemented as a planetary gear set and the transmission gear stage 6 as a spur gear stage. The axle offset device can direct drive power from the transmission gear stage 6 to the second power output 4 and thus to the second vehicle wheel F2. The axle offset device formed by the stepped ring gear 7 transmits the speed and torque of the transmission gear stage 6 to the second power output 4. The axle offset device, or the stepped ring gear 7, allows the speed and torque from the transmission gear stage 6 to remain unchanged.can be delivered 1:1 to the second power output 4; mechanical losses not taken into account.

[0058] In other words, the distribution device 1, or the transmission gear stage 6, has a stepped ring gear 7 to compensate for an offset or axis offset between the first and second power outputs 3, 4. Because the transmission gear stage 6—as explained below—is designed as a spur gear stage to drive one vehicle wheel F2 in combination with the distribution gear stage 5 to drive another vehicle wheel F1, forming a common vehicle axle, it may be necessary to select the gear ratios for both vehicle wheels F1, F2 such that, for example, when driving straight ahead, the rotational speeds of the first and second power outputs 3, 4 are identical. In this context, the transmission gear stage 6 and the distribution gear stage 5 may have an axis offset, which must be compensated for by means of the stepped ring gear 7.

[0059] According to Fig. 1. The stepped ring gear 7 comprises a first ring gear 8 and a second ring gear 9. The first ring gear 8 and the second ring gear 9 have different diameters. In other words, the pitch circle diameter of the second ring gear 9 is larger than the pitch circle diameter of the first ring gear 8. The stepped ring gear 7 is formed in one piece.

[0060] Furthermore, the first ring gear 8 has internal teeth and a first pitch circle diameter. The second ring gear 9 also has internal teeth and a second pitch circle diameter. The first pitch circle diameter is, as already mentioned, smaller than the second pitch circle diameter (see figure). Fig. 1).

[0061] Furthermore, it shows Fig. 1. The transmission gear stage 6 is designed as a spur gear stage. This allows for an increase in the gear ratio in the distribution device 1 beyond the limits of the arrangement with two planetary gears, one per gear stage, as provided for in prior art solutions. Furthermore, this solution allows for weight savings and improved efficiency of an electric drive.

[0062] In more detail, the transmission stage 6 comprises a spur gear 10 in addition to the stepped ring gear 7. The spur gear 10 meshes with the first ring gear 8 of the stepped ring gear 7. The first ring gear 8 has internal teeth, while the spur gear 10 has external teeth. Thus, a spur gear stage can be formed, or a spur gear transmission can be realized with a spur gear and a first ring gear 8 of the stepped ring gear 7. This solution uses few components and is therefore weight-saving. Furthermore, the axes of rotation of the spur gear 10 and the stepped ring gear 7 are offset from each other.

[0063] As in Fig. As can be seen in Figure 1, the distribution gear stage 5 comprises a planetary gear 11, which has a ring gear 17. The ring gear 17 of the planetary gear 11 of the distribution gear stage 5 and the stepped ring gear 7 of the transmission gear stage 6, or the second ring gear 9 of the stepped ring gear 7 of the transmission gear stage 6, are rotationally fixed to each other or formed as a single unit. This very symbiosis of the ring gear 17 of the planetary gear 11 and the first and second ring gears 8, 9 of the stepped ring gear 7 creates a simple design for the distribution device 1 and simultaneously an optimized weight compared to prior art solutions.

[0064] Furthermore, how from Fig. As can be seen in Figure 1, the planetary gear 11 comprises a sun gear 12, first planets 13, second planets 14 and third planets 15, a planet carrier 16 and the ring gear 17. The first, second and third planets 13, 14, 15 are rotatably arranged on the planet carrier 16.

[0065] Furthermore, the first planets 13 only interact with the sun wheel 12, while the second planets 14 only interact with the third planets 15.

[0066] Furthermore, the first and second planets 13, 14 are rotatable about a common axis of rotation and are connected to each other in a rotationally fixed manner, forming a stepped planetary gear set. The third planets 15 mesh with, or are in engagement with, the second planets 14 and the ring gear 17, or with the transmission stage 6. This configuration allows drive power to be distributed from the distribution stage 5 to a first vehicle wheel F1, as well as to the transmission stage 6 and thus to a second vehicle wheel F2. More precisely, the power is split via the distribution stage 5 to the planet carrier 16 and the ring gear 17, or to the transmission stage 6.

[0067] Furthermore, it shows Fig. 1. The first, second, and third planets 13, 14, 15 have different and, in some cases, the same pitch circle diameters to generate a definable gear ratio. The pitch circle diameter of the first planet 13 is larger than the pitch circle diameter of the second and third planets 14, 15. Furthermore, the pitch circle diameter of the second planet 14 and the third planet 15 is the same. In this way, a further gear ratio can be achieved within the planetary gear set 11 of the distribution gear stage 5 using the second and third planets 14, 15. This, in combination with the spur gear 10 of the transmission gear stage 6, results in a weight-optimized solution for the electric axle drive device 40.

[0068] Furthermore, it shows Fig. 1, that the sun wheel 12 is non-rotatably connected to the power input 2 or is formed in one piece.

[0069] The planet carrier 16 is rotationally fixed to the first power output 3, with the planet carrier 16 functioning as the first power output 3.

[0070] In summary, it can be stated that the distribution device 1 is designed as a rolling differential or that the distribution device 1 is a spur gear differential.

[0071] Finally, it should be noted that the first and second power outputs 3 and 4 are each formed by a shaft or axis that are aligned in the same orientation relative to each other. More precisely, the first and second power outputs 3 and 4 are coaxially aligned. 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-step ring gear 8 first ring gear 9 second ring gear 10 Spur gear 11 planetary gears 12 sun wheel 13 first planets 14 second planets 15 third planets 16 planetary carriers 17 Ring gear 18 Locking device 19 first slats 20 second slats 30 drive 40 axle drive device 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 can be connected to a drive (30), - a first and a second power output (3, 4) that can be 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 transmitting drive power, - wherein the transmission gear stage (6) has a stepped ring gear (7), characterized by, that the transmission gear stage (6) is designed to transmit drive power from the distribution gear stage (5) to the second power output (4), wherein the distribution device (1) has a locking device (18) with which the first and second power outputs (3, 4) can be at least partially connected to each other and completely disconnected from each other in order to equalize speed and torque between the first and second power outputs (3, 4). [2] Distribution device according to claim 1, - wherein the locking device (18) is designed as a multi-plate clutch, - wherein the locking device (18) has first and second lamellae (19, 20), and - wherein the first lamellae (19) are non-rotatably connected to the distribution gear stage (5) and the second lamellae (20) are non-rotatably connected to the transmission gear stage (6). [3] Distribution device according to claim 2, - wherein the first lamellae (19) are non-rotatably connected to the first power output (3) and the second lamellae (20) are non-rotatably connected to the second power output (4), - wherein the first lamellae (19) are slidably mounted on the first power output (3) or on a planet carrier (16) of a planetary gear set (11) of the distribution gear stage (5), so that the first and second lamellae (19, 20) can be engaged by an axial displacement, and / or - wherein the second lamellae (20) are slidably attached to the second power output (4) or to a spur gear (10) of the transmission gear stage (6), so that the first and second lamellae (19, 20) can be brought into engagement by an axial displacement. [4] Distribution device according to one of the preceding claims, - wherein the stepped ring gear (7) comprises a first ring gear (8) and a second ring gear (9), - wherein the first ring gear (8) and the second ring gear (9) have different diameters, - wherein the first ring gear (8) has internal teeth, and - wherein the second ring gear (9) has internal teeth. [5] Distribution device according to one of the preceding claims, - wherein the transmission gear stage (6) is designed as a spur gear stage, - wherein the transmission gear stage (6) comprises a spur gear (10) in addition to the stepped ring gear (7), and - wherein the spur gear (10) meshes with a first ring gear (8) of the stepped ring gear (7). [6] Distribution device according to one of the preceding claims, - wherein the distribution gear stage (5) comprises a planetary gear set (11), - wherein the planetary gear (10) has a ring gear (17), and - wherein the ring gear (17) of the planetary gear (10) of the distribution gear stage (5) and the stepped ring gear (7) of the transmission gear stage (6) or the second ring gear (9) of the transmission gear stage (6) are connected to each other in a rotationally fixed manner. [7] Distribution device according to one of the preceding claims, - wherein the planetary gear (11) comprises a sun gear (12), first planets (13), second planets (14) and third planets (15), a planet carrier (16) and a ring gear (17), and - wherein the first, second and third planets (13, 14, 15) are rotatably arranged on the planet carrier (16). [8] Distribution device according to claim 5, - where the first planets (12) comb with the sun wheel (11), - where the second planets (13) comb with the third planets (14), - where the first and second planets (12, 13) form a stepped planetary set, and - where the third planets (14) mesh with the second planets (13) and the ring gear (17). [9] Distribution device according to claims 5 to 7, - wherein the sun gear (11) is non-rotatably connected to the power input (2) or is formed in one piece, and - wherein the planet carrier (15) is rotationally fixed to the first power output (3). [10] Electric axle drive device (40) for driving several vehicle wheels (F1, F2) of an electric vehicle comprising: - a distribution device (1) according to one of the preceding claims, and - at least one electric drive (30) arranged coaxially to the first and / or second power output (3, 4) of the distribution device (1), - wherein a shaft of the at least one electric drive (30) forms the power input (2) of the distribution device (1).

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