DE102022133316A1 - Integrally designed electric axle drive device - Google Patents

Abstract

The invention relates to an integrally formed electric axle drive device (1) for driving one or more vehicle wheels of an electric or hybrid vehicle, comprising: - at least one electric machine (2A, 2B) with a stator (2C, 2D), a rotor (2E, 2F) and a shaft (2G, 2H) which is non-rotatably connected to the rotor (2E, 2F),- at least one transmission device (3A, 3B) with an input (4) and with an output (5),- the input (4) connectable to the shaft (2G, 2H) and/or to the rotor (2E, 2F), - the outlet (5) being connectable to one or more vehicle wheels, - a housing (6) for enclosing and confining , and- a distribution device (7) for dividing, forwarding and/or interrupting at least one output variable of the at least one transmission device (3A, 3B) and/or the at least one electrical machine (2A, 2B) to one or more vehicle wheels,- wherein the distribution device (7) has at least one distribution unit (8, 9, 10) which is designed similarly to a coupling device, so that the at least one transmission device (3A, 3B) can be detachably connected to one or more vehicle wheels in order to facilitate the distribution, further distribution and /or interrupting at least one output variable of the at least one transmission device (3A, 3B) to one or more vehicle wheels or to outputs (32, 33) of the axle drive device (1).

Description

The invention relates to an integrally formed electric axle drive device for driving one or more vehicle wheels of an electric or hybrid vehicle.

From the DE 10 2019 201 989 an integral electric axle drive device is known which, in addition to a gearbox for converting the torque of an electric machine, has two brake units (cf. 3 the DE 10 2019 201 989 ).

The transmission includes an intermediate transmission and a differential, which distributes the speed of the electric machine to two axle drives after transmission by the intermediate transmission.

A brake unit is connected downstream of the intermediate gear for each axle drive, so that the speed of each axle drive can be reduced separately by the brake unit. The speed reduced on one side is transferred to the other side by the differential. This structure appears complex, detailed and requires a large amount of space within a vehicle.

Therefore, it is the object of the present invention to specify an integrally designed electric axle drive device for driving one or more vehicle wheels of an electric or hybrid vehicle, which has a simple structure, requires little installation space, can be produced easily and/or with known means and inexpensively and also can be reliable in operation.

This object is solved by the features of the independent patent claim. Further advantageous developments are the subject matter of the dependent claims.

In the present invention, an integrally formed electric axle drive device for driving one or more vehicle wheels of an electric or hybrid vehicle comprises at least one electric machine with a stator, a rotor and a shaft which is non-rotatably connected to the rotor. The electrical machine can be a radial flux machine or an axial flux machine.

Furthermore, the axle drive device comprises at least one transmission device with an input and with an output, the input being able to be connected to the shaft and/or to the rotor. The output can be connected to one or more vehicle wheels.

In addition, the final drive device has a housing for enclosing and defining the final drive device.

Furthermore, the axle drive device includes a distribution device for dividing, forwarding and/or interrupting at least one output variable of the at least one transmission device and/or the at least one electric machine, such as speed and/or torque, to one or more vehicle wheels. The at least one output variable can be a speed and/or a torque of the transmission device and/or the electric machine.

The distribution device has at least one distribution unit, which is designed similarly to a clutch device, so that the at least one transmission device can be detachably connected to one or more vehicle wheels in order to split, redistribute and/or interrupt at least one output variable of the at least one transmission device to one or more vehicle wheels or to control and/or monitor the outputs of the axle drive device.

The distribution device or at least one distribution unit of the distribution device and/or a braking device of the axle drive device or at least one braking unit of the braking device of the axle drive device can be arranged inside or within the rotor of the at least one electric machine. In this way, the installation space within a vehicle can be saved in the axial and radial directions.

The outer dimensions of the rotor of the at least one electrical machine can exceed the outer dimensions of the distribution device or the at least one distribution unit of the distribution device and/or a braking device of the axle drive device or at least one braking unit of the braking device of the axle drive device, so that the rotor overhangs the distribution device in the axial and radial direction or the at least one distribution unit and/or the braking device or the at least one braking unit protrudes beyond the braking device. As a result, installation space or space can be saved in the axial and radial direction, by which the axle drive device can be made shorter in comparison to solutions from the prior art.

The external dimensions or external dimensions or external dimensions or external dimensions of the rotor of the at least one electrical machine, such as length, width and height, the external dimensions or external dimensions or external dimensions or external dimensions of the distribution device or the least a distribution unit of the distribution device and/or a braking device of the axle drive device or at least one braking unit of a braking device of the axle drive device, such as length, width and height, or even be the same. Thus, installation space in an axle drive device can be saved.

Furthermore, the distribution device or at least one distribution unit or a first, second and/or third distribution unit of the distribution device can comprise a disk pack and/or an actuating actuator which is arranged inside the rotor of the at least one electrical machine. The axle drive device can thus be implemented in a smaller installation space.

Furthermore, a brake device of the axle drive device or a first and/or second brake unit of a brake device of the axle drive device can comprise a disk pack and/or an actuating actuator which is arranged inside the rotor of the at least one electric machine. Consequently, the axle drive device requires a smaller installation space.

The distribution device can have at least one distribution unit or a first, a second and/or a third distribution unit, e.g. B. dividing, further dividing and/or interrupting at least one output variable of the at least one transmission device and/or the at least one electric machine to one or more vehicle wheels. The distribution device can also exclusively have a first or second or third distribution unit. Several distribution units can be nested or arranged one behind the other radially or in the radial direction and also axially or in the axial direction.

Furthermore, the first, second and/or third distribution unit can connect the output of the at least one transmission device to one or more vehicle wheels in order to split, forward and/or interrupt at least one output variable of the at least one transmission device and/or the at least one electric machine to realize one or more vehicle wheels.

The first, second and/or third distribution unit can be designed similarly to a coupling device. The at least one transmission device and/or the at least one electrical machine can thus be releasably connected to one or more vehicle wheels. In this way, at least one output variable of the at least one transmission device and/or the at least one electric machine can be further divided, split up or interrupted to one or more vehicle wheels or output drives of the axle drive device. The design of the torque distribution device or the distribution device similar to a clutch device can be implemented as a torque vectoring clutch, which can be constructed or implemented similar to a multi-plate clutch or in a multi-plate design or in a disk design, for example as a multi-disk clutch. For example, a lamellar design can be selected as the design for the clutch device or distributor device or for its at least one distributor unit, since multiple lamellae or lamellar elements (dry or wet) can be used to achieve high torques with little installation space and this design is particularly flexible with regard to the Design options are possible (integration into a wide variety of installation spaces possible, adaptable with regard to cooling capacity and thermal mass, e.g. via different lamella thicknesses and number of lamella elements as well as groove patterns). Due to the lamellar design or lamellar construction, a distribution device can be easily scaled over the number of lamellar elements; the design is technically mature and well suited for hydraulic or electromechanical control.

With the help of such a distribution device, not only can a torque and/or a speed be distributed and/or forwarded in a targeted manner, a decoupling function can also be implemented, in which no torque at all from the at least one electric machine or the at least one transmission device to a vehicle wheel reached.

Furthermore, a first, second and/or third distribution unit of the distribution device can comprise a disk pack with first disk elements and second disk elements and an actuating actuator which moves the disk elements together in order to transmit torque. The actuating actuator can be arranged on the housing or inside the rotor of the at least one electrical machine. This again saves installation space in the axial and/or radial direction. The actuating actuator can, for. B. via a stationary or fixed slave cylinder with release bearing or a rotary union or electromechanically such. B. by means of a ball ramp and a spindle assembly.

The first, second and/or third distribution unit can have a spring device, e.g. B. a plate spring, having the spring force applied to the first and second lamellar elements and which acts against the force of the actuating actuator. Thus, the actuating actuator can be returned to its initial position and/or the first and second lamella elements can be released from mutual engagement.

The first, second and/or third distribution unit can e.g. B. each have at least one input part. The at least one input part of the first, second and/or third distribution unit can be non-rotatably connected to the output of the at least one transmission device in order to introduce at least one output variable of the at least one transmission device from the output of the at least one transmission device into the distribution unit via the input part.

The at least one input part of the second distribution unit can be connected to a shaft of a first output of the axle drive device.

Furthermore, the at least one input part of the second distribution unit can be non-rotatably connected to an output part of the first distribution unit of the distribution device via a shaft of a first output of the axle drive device.

The input parts of the first and second distribution unit can be rotatably connected to each other and z. B. together form an output part of the first distribution unit.

The at least one input part can be designed similarly to a differential carrier or a hollow shaft.

Furthermore, the first, second and/or third distribution unit can have at least one output part. The at least one output part of the first, second and/or third distribution unit can be connected in a torque-proof manner to at least one shaft of a first and/or second output of the axle drive device.

In addition, the at least one output part of the second distribution unit can include sun gear elements.

The at least one output part can be designed similar to a hollow shaft or similar to a disk carrier. The at least one output part can also have at least one sun wheel element, e.g. B. a spur gear such. B. a spur gear differential have.

The output part of the second distribution unit and/or a first or second sun gear element of the second distribution unit can be connected to the output part of the first and/or third distribution unit, e.g. B. via a shaft of a first or second output of the axle drive device, be rotatably connected.

On at least one input part of the first, second and/or third distribution unit, first lamellar elements of a lamina pack of the first, second and/or third distribution unit can, e.g. B. inside or outside, for example, be rotatably arranged.

On at least one output part of the first, second and/or third distribution unit, second disk elements of a disk pack of the first, second and/or third distribution unit can be attached, e.g. B. outside or, for example, inside rotatably arranged.

In addition, the distribution device can have a second distribution unit to compensate for at least one output variable of the transmission device, such as speed and/or torque. The first, second and/or third distribution unit can be arranged outside the rotor of the at least one electrical machine.

The second distribution unit can be designed as a spur gear or as a spur gear differential.

Furthermore, the second distribution unit can have a hollow shaft or a differential carrier as the input part. B. rotatably connected to the output of the at least one transmission device, for example with a planet carrier of the at least one transmission device.

The input part of the second distribution unit can be designed as a differential carrier. The input part can have side walls that delimit the second distribution unit.

The or a second distribution unit of the distribution device can also have a first and a second sun wheel element, e.g. B. as an output part, each connectable to a vehicle wheel.

The second distribution unit may also include multiple pairs of first and second planetary elements, the first planetary elements meshing with the first sun gear element and the second planetary elements, and the second planetary elements meshing with the second sun gear element and the first planetary elements. The first and second planetary elements can be rotatably arranged on side walls of the distribution unit. Thus, torque can be transmitted from the sidewalls to the planetary elements, which in turn can transmit torque to the sun gear elements.

The first sun gear element can be connected to a first and/or second output of the final drive device, e.g. B. with its shaft or shafts, be rotatably connected.

The second sun wheel element can be non-rotatably connected to a second output of the final drive device, for example to its shaft.

In addition, as an alternative or in addition, it can be provided that the second sun wheel element is non-rotatably connected to a rotating brake part of a first and/or second brake unit of a brake device of the axle drive device.

Furthermore, the axle drive device can have a braking device for completely or partially braking or slowing down one or more vehicle wheels.

The braking device can have at least one braking unit or a first and/or second braking unit. The braking device can also exclusively have a first or second braking unit. A brake unit is used to brake or slow down one or more vehicle wheels to z. B. to bring a vehicle to a standstill.

The braking device or at least one braking unit, e.g. B. designed as a clutch device similar to a multi-plate clutch, offers various advantages. Because the brake units or the braking device can use the same actuation system such. B. a clutch or distribution device for producing and interrupting a torque flow can be actuated and z. B. be operated with the same oil additives (for example in the case of wet-running friction linings on a trained with lamellar elements clutch or distribution device and / or brake device). However, it is also conceivable for the braking device to be designed as a dry friction clutch or brake (for example as a dry multi-plate clutch/brake or single-disc clutch/shoe brake, etc.).

In this context, it seems possible that the first and / or the second brake unit of the braking device with an appropriate design with z. B. an additional mechanical (eg. This is possible, for example, if a brake unit is arranged, for example directly, on an output of an output device of the axle drive device. In this case it would be sufficient to fix a brake unit on a first or second output side of the axle drive device so that a vehicle does not roll away.

The braking device and/or the first and/or second braking unit can be designed similarly to a clutch device, so that one or more vehicle wheels or output drives of the axle drive device can be slowed down in a controlled manner by means of a braking torque generated by the clutch device. Such an embodiment creates a braking device that is independent of external environmental influences, such as wetness or rust on a brake disc. In this case, the brake device can be configured as a multi-plate design or as a multi-plate brake or as a disk design, similar to a disk brake, or as a multi-disk clutch.

The design, similar to a clutch device, allows improved controllability (no film of water, dirt, rust) through encapsulation in a housing and is suitable, for example, for hill hold or brake-based torque vectoring.

In addition, the design, similar to a clutch device, does not cause any particle emissions and allows a reduction in complexity due to a smaller number of different systems in a vehicle.

Furthermore, the mass can be reduced and shifted towards the center of the vehicle (mass moment of inertia around the vertical axis). Furthermore, unsprung masses are reduced.

Furthermore, a multi-disc brake or multi-disc design can be selected as the design for the braking device or for its at least one brake unit, since high torques can be achieved with little installation space thanks to several disks or disk elements (dry or wet) and this design is particularly flexible with regard to of the design options (integration possible in a wide variety of installation spaces, adaptable with regard to cooling capacity and thermal mass via different lamella thicknesses and number of lamella elements as well as groove patterns).

Due to the lamellar design, a braking device can be easily scaled via the number of lamellar elements; the design is technically mature and is very well suited for hydraulic or electromechanical control (e.g. brake by wire).

In addition, all the functions of a conventional braking system can be taken over by means of the braking device (e.g. dry disc brakes with brake booster, braking force distribution ABS/ESP).

The first and/or second brake unit can be arranged outside the rotor of the at least one electrical machine. This simplifies construction and assembly.

The/a first and/or second brake unit of a brake device of the axle drive device can each comprise a fixed brake part and a rotating brake part.

The fixed and/or rotating brake part can be designed similarly to a hollow shaft or similar to a disk carrier.

The stationary brake part can be connected in a rotationally fixed manner to the housing of the axle drive device.

In addition, the fixed brake part can be formed by the housing of the axle drive device.

The rotating brake part of the first brake unit can also be non-rotatably connected to a shaft of a first and/or second output of the axle drive device. The corresponding drives or shafts can thus be slowed down.

Furthermore, the rotating brake part of the first or second brake unit can be non-rotatably connected to at least one input or to at least one output part of a first, second and/or third distribution unit of the distribution device.

The rotating braking part of the first or second braking unit can also be designed in one piece with at least one output part of a first, second and/or third distribution unit of the distribution device.

The rotating brake part of the second brake unit can be non-rotatably connected to a disk carrier of the second distribution unit. Alternatively, the rotating brake part of the second brake unit can be non-rotatably connected to a second sun wheel element of the second distribution unit and to a shaft of a second output of the axle drive device.

The/a first and/or second brake unit of a braking device of the axle drive device can comprise a disk pack with first disk elements and second disk elements and an actuating actuator which moves the disk elements together in order to convert rotational energy into thermal energy. The actuating actuator can be arranged inside the rotor of the at least one electrical machine. This again saves installation space in the axial and/or radial direction. However, the actuating actuator can also be arranged on the housing. The actuating actuator can, for. B. via a stationary slave cylinder with release bearing or via a rotary union or electromechanically such. B. by means of a ball ramp and a spindle assembly.

The first and / or second brake unit can be a spring device, such as. B. a plate spring, having the spring force applied to the first and second lamellar elements and which acts against the force of the actuating actuator to return the actuating actuator to its initial position and / or to release the first and second lamellar elements from mutual engagement.

The first lamellar elements can be arranged in a rotationally fixed manner on the inside or outside of the stationary brake part and/or inside or outside on the housing.

The second lamellar elements can be arranged in a rotationally fixed manner on the inside or outside of the rotating brake part or on the rotor.

As already mentioned, the axle drive device can have a braking device for completely or partially braking or slowing down one or more vehicle wheels.

The braking device can include at least one braking unit or a first and/or second braking unit, and the distribution device can have at least one distribution unit or a first, a second and/or a third distribution unit.

Against this background, the first, second and/or third distribution unit and the first and/or second brake unit can be offset or nested radially relative to one another or offset or nested relative to one another in the radial direction in order to save axial installation space or installation space in axial direction A .

It is also possible for the first, second and/or third distribution unit and the first and/or second brake unit to be offset or nested axially with respect to one another or to be offset or nested with one another in the axial direction in order to take up radial installation space or installation space in the radial direction to save R.

Furthermore, the transmission device can have at least one planetary gear. The at least one planetary gear can have a sun gear element and at least one planetary element and a ring gear. The ring gear can be fixed to the housing of the axle drive device. The sun wheel element can form the input of the at least one transmission device. The at least one planetary gear can also be multi-geared (e.g. two or more shiftable gears).

Also, the at least one transmission device z. B. have spur gears or a spur gear instead of planetary stages or instead of a planetary gear. The at least one transmission device can also have multiple planetary stages and/or spur gear stages.

A planetary carrier, which can connect planetary elements of at least one planetary gear of the at least one gear mechanism to one another, can form the output of the at least one gear mechanism.

The sun wheel element or the input of the at least one transmission device can be connected to the shaft and/or the rotor of the at least one electrical machine in a torque-proof manner.

Furthermore, the axle drive device can have a first output side for connection to a first vehicle wheel of a vehicle and a second output side for connection to a second vehicle wheel of a vehicle.

The first and second output sides can be arranged at opposite ends or sides of the at least one electric machine or the axle drive device.

The at least one transmission device can be arranged on the first output side.

The axle drive device can have a first output for a first and/or second vehicle wheel of a vehicle. The first output can lead to a first and/or second vehicle wheel on a first and/or second output side at least one output variable, which flows from the at least one electric machine via the at least one transmission device to the first output.

The first output may include a shaft that supplies torque and speed to a first and/or second vehicle wheel on a first and/or second output side of the final drive device. The shaft can be connected in a torque-proof manner to an output part of a first, second and/or third distribution unit of the distribution device in order to transmit a torque and/or a speed from the distribution unit of the distribution device to a vehicle wheel. The shaft can also be non-rotatably connected to an output part or a first sun gear element of a second distribution unit of the distribution device in order to transmit a torque and/or a speed from the second distribution unit of the distribution device to a vehicle wheel.

In addition, the shaft can be non-rotatably connected to a rotating brake part of a first brake unit of a brake device of the final drive device in order to reduce a torque and/or a speed of the shaft of the first output.

The axle drive device can also have a second output for a second vehicle wheel of a vehicle. The second output can lead to a first and/or second vehicle wheel on a second and/or first output side at least one output variable, which flows from the at least one electric machine via the at least one transmission device to the second output.

In addition, the second output can include a shaft, which leads a torque and a speed to a first and/or second vehicle wheel on a second output side of the axle drive device. The shaft can be non-rotatably connected to at least one output part of a first, second and/or third distribution unit of the distribution device in order to transmit a torque and/or a speed from the corresponding distribution unit to a vehicle wheel.

The shaft can also be non-rotatably connected to a second sun gear element of a second distribution unit of the distribution device and to a rotating brake part of a second brake unit of a braking device of the final drive device in order to transmit a torque and/or a speed to the second output or to reduce it from the second distribution unit .

Furthermore, the shaft of the electrical machine can be designed as a hollow shaft. Furthermore, the shaft of the second output and/or the shaft of the first output can be arranged inside the shaft of the at least one electrical machine, which is designed as a hollow shaft, in order to transfer at least one output variable of the at least one electrical machine from one or the first output side to the other or second output side or to the first output side or to lead out of a first, second and/or third distribution unit of the distribution device on the first or second output side.

The at least one output variable of the electrical machine and/or the transmission device can be a speed and/or a torque.

The integral electric axle drive device can also be installed on a front axle and/or on a rear axle of an electric or hybrid vehicle.

In principle, it is also pointed out that the electrical machine, the transmission device, the braking device and/or the distribution device can be arranged not only coaxially (“on axis” or coaxial solution) with one another, for example with regard to their inputs and outputs, but also with one another offset axes (“Off Axis” solution) can be arranged. So e.g. B. instead of a planetary gear as a transmission device between the electric machine and designed as a differential distribution unit, a spur gear with one or more other shafts can be used or arranged.

In the following, the inventive idea presented above is expressed again and additionally in other words.

In simplified terms, this idea relates to differential locks which are known from conventional drive trains.

In the case of a transverse lock or a differential lock, no external torque is applied between the differential carrier and a shaft of an output of an axle drive device or a side shaft, but an internal torque is generated. As a result, a torque vectoring moment cannot be generated independently of the traction moment (as with real torque vectoring systems).

A torque vectoring effect can only be achieved with an eLSD (electronic limited slip differential) in certain driving situations (influence on the yawing moment of the vehicle about the vertical axis). However, if the axle is locked up to a maximum of 100%, traction can be significantly improved compared to an open differential. Therefore, in combination with rear axle steering (Rear Wheel Steering, RWS), for example, there is a very good combination of handling (through the RWS) and traction when accelerating out of curves or when starting off on loose ground (through the eLSD). But even without rear-axle steering, traction and driving dynamics are significantly improved compared to a simple open differential.

A limited slip differential can be used as a design, in which the lamella elements are designed as wet-running friction lamellae. As further gradations/variants, solutions for passive locking differentials can be combined with RWS such as torque sensing or speed sensing differentials or spring-loaded differentials. Depending on the vehicle application, either traction and costs can be in the foreground (mass market, smaller SUVs or similar) or racetrack performance and/or maneuverability (high-end premium vehicles, sports vehicles).

ELSD solutions are also an alternative to torque vectoring clutch solutions, which have the advantage that a differential can be dispensed with and (if necessary) the axle or shafts can also be decoupled via the torque vectoring clutches.

However, for torque vectoring clutches, two clutch devices must be installed and controlled separately. With an eLSD, one clutch device is sufficient to achieve up to 100% locking effect. This solution can therefore be advantageous for some applications where traction is the priority or where an RWS is also installed and the axle does not have to be uncoupled. Another example would be the use on the front axle to increase driving dynamics and traction in addition to the rear axle (or with pure front-wheel drive).

In short, it can also be an inventive idea to use standard modules for an electric machine (in various designs) and/or for a transmission device, such as a transmission gear (in various designs), and/or for a distribution unit, such as a differential (in various designs). Designs) and/or for a braking device or a braking unit (can be arranged at various points) to be able to use it to implement an integrally formed electric axle drive device.

• 1 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem ersten Ausführungsbeispiel;
• 2 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem zweiten Ausführungsbeispiel;
• 3 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem dritten Ausführungsbeispiel;
• 4 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem vierten Ausführungsbeispiel;
• 5 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem fünften Ausführungsbeispiel; und
• 6 eine schematische Ansicht auf eine integral ausgebildete elektrische Achsantriebsvorrichtung nach einem sechsten Ausführungsbeispiel.

The invention is explained in more detail below using exemplary embodiments in conjunction with the associated drawings. Here show schematically:

• 1 a schematic view of an integrally formed electric axle drive device according to a first embodiment;
• 2 a schematic view of an integrally formed electric axle drive device according to a second embodiment;
• 3 a schematic view of an integrally formed electric axle drive device according to a third embodiment;
• 4 a schematic view of an integrally formed electric axle drive device according to a fourth embodiment;
• 5 a schematic view of an integrally formed electric axle drive device according to a fifth embodiment; and
• 6 a schematic view of an integrally formed electric axle drive device according to a sixth embodiment.

In the following description, the same reference numbers are used for the same objects.

Before explaining the 1 until 6 it is also noted that in the respective functional descriptions of the individual exemplary embodiments, the electric machine 2 can also recuperate and can thus actively help to shape a braking process.

1 shows a schematic view of an integrally formed electric axle drive device 1 according to a first embodiment. Shows in more detail 1 an integrally formed electric axle drive device 1 for driving one or more vehicle wheels of an electric or hybrid vehicle.

The axle drive device 1 has an electric machine 2A with a stator 2C, with a rotor 2E and with a shaft 2G which is non-rotatably connected to the rotor 2E.

Furthermore, the axle drive device 1 has a transmission device 3A with an input 4 and an output 5, the input 4 being connected to the shaft 2G. The output 5, on the other hand, is connected to one or more vehicle wheels. In addition, the axle drive device 1 has a housing 6 for enclosing and delimiting.

Furthermore shows 1 that the axle drive device 1 has a distribution device 7 for dividing, forwarding and/or interrupting output variables of the transmission device 3A, such as speed and torque, to one or more vehicle wheels.

Strictly speaking, the distribution device 7 has two distribution units 8, 9, the first distribution unit 8 being designed similarly to a clutch device, so that the transmission device 3A can be detachably connected to one or more vehicle wheels. It is thus possible to control the distribution, further distribution or interruption of the output variables of the transmission device 3A to one or more vehicle wheels or to outputs 32, 33 of the axle drive device 1.

while showing 1 furthermore, that the outer dimensions of the rotor 2E of the electrical machine 2A protrude beyond the outer dimensions of the distribution device 7 or the first distribution unit 8 of the distribution device 7, so that the rotor 2E protrudes beyond the distribution unit 8 in the axial and radial directions A, R. As a result, installation space or space in the axial and radial direction A, R can be saved, by which the axle drive device 1 can be made shorter in comparison to solutions from the prior art. In other words, the outer dimensions of the rotor 2E of the electrical machine 2A, such as length, width and height, project beyond the outer dimensions of the first distribution unit 8, such as length, width and height. The first distribution unit 8 is thus arranged at least with its disk pack 11 and its actuating actuator 14 inside the rotor 2E.

Furthermore shows 1 that the first and second distribution unit 8, 9 connect the output 5 of the transmission device 3A to one or more vehicle wheels (not shown) in order to divide, forward and/or interrupt the output variables of the transmission device 3A or the electric machine 2A to one or to realize several vehicle wheels.

As mentioned, the first distribution unit 8 is designed similarly to a clutch device and has a disk set 11 with first disk elements 12 and second disk elements 13 and an actuating actuator 14, which moves the disk elements 12, 13 together in order to transmit torque. In this case, the actuating actuator 14 is arranged inside the rotor 2E of the electrical machine 2A.

Furthermore, the first distribution unit 8 has a spring device (not shown), such as. B. a disc spring, the spring force of which acts on the first and second lamellar elements 12, 13 and which acts against the force of the actuating actuator 14 in order to reset the actuating actuator 14 to its initial position or to release the first and second lamellar elements 12, 13 from mutual engagement.

also is 1 to see that the first and second distribution unit 8, 9 each have an input part 15A, 15B. The input parts 15A, 15B, 15C are non-rotatably connected to the output 5 of the transmission device 3A in order to introduce output variables of the transmission device 3A from the output 5 of the transmission device 3A via the input part 15A, 15B into the respective distribution unit 8, 9. Consequently, the input parts 15A, 15B of the first and second distribution unit 8, 9 are connected to one another in a rotationally fixed manner.

Furthermore shows 1 that the first and second distribution unit 8, 9 each have an output part 16A, 16B, the output part 16B of the second distribution unit 9 comprising sun gear elements 28, 29 - more on this below.

The output parts 16A, 16B of the first and second distribution unit 8, 9 are connected to a shaft 34, 35 of a first and a second output 32, 33 of the axle drive device 1 in a rotationally fixed manner.

With a view to 1 It can be seen that the input parts 15A, 15B of the first and second distribution unit 8, 9 are designed similarly to a differential carrier or a hollow shaft. The output part 16A of the first distribution unit 8 is also designed similar to a disk carrier, whereas the output part 16B of the second distribution unit 9 includes sun gear elements 28, 29.

First disk elements 12 of a disk pack 11 of the first distribution unit 8 are arranged on the inside in a rotationally fixed manner on the input part 15A of the first distribution unit 8 . Furthermore, on the output part 16A of the first distribution unit 8, second lamellar elements 13 of a disk set 11 of the first distribution unit 8 are arranged on the outside in a rotationally fixed manner.

The output part 16B or the second sun wheel element 29 of the second distribution unit 9 is connected in a torque-proof manner to the output part 16A of the first distribution unit 8 via a shaft 35 of a second output 33 of the axle drive device 1 .

As already mentioned, the distribution device 7 has to compensate for output sizes of the transmission device 3A, such as e.g. B. speed and / or torque, a second distribution unit 9. The second distribution unit 9 is - as in 1 shown - arranged outside the rotor 2E of the electric machine 2A.

Furthermore, the second distribution unit 9 is designed as a spur gear and has a differential carrier as the input part 15B, which is non-rotatably connected to the output 5 of the transmission device 3A or to a planetary carrier 5B of the transmission device 3A.

Furthermore shows 1 that the second distribution unit 9 has a first and a second sun gear element 28, 29 as an output part 16B, each connectable to a vehicle wheel. Furthermore, the second distribution unit 9 has several pairs of first and second planetary elements 30, 31. The first planetary elements 30 mesh with the first sun gear element 28 and with the second planetary elements 31, the second planetary elements 31 with the second sun gear element 29 and with the first planetary elements 30 are engaged.

In addition, shows 1 that the first sun gear element 28 is non-rotatably connected to a first output 32 of the axle drive device 1 or to its shaft 34, wherein the second sun gear element 29 is non-rotatably connected to a second output 33 of the axle drive device 1 or to its shaft 35.

In addition, the first sun wheel element 28 is connected in a rotationally fixed manner to a rotating brake part 21A of a first brake unit 18 of a brake device 17 of the final drive device 1 . Furthermore, the second sun wheel element 29 is connected to a rotating brake part 21 B of a second brake unit 19 of a brake device 17 of the axle drive device 1 in a torque-proof manner.

As indicated, the axle drive device 1 has a braking device 17 for completely or partially braking or slowing down one or more vehicle wheels.

In accordance with 1 the brake device 17 has two brake units 18, 19 or a first and second brake unit 18, 19. The first and second brake unit 18, 19 are designed similar to a clutch device, so that one or more vehicle wheels or power take-offs 32, 33 of the Axle drive device 1 can be slowed down in a controlled manner.

Both the first and the second brake unit 18, 19 have a fixed brake part 20A, 20B and a rotating brake part 21A, 21 B. The rotating brake part 21A, 21 B is designed similar to a disk carrier, whereas the fixed brake part 20A, 20B is of the Housing 6 of the axle drive device 1 is formed.

In addition, shows 1 that the rotating brake part 21A of the first brake unit 18 is non-rotatably connected to a shaft 34 of a first output 32 of the axle drive device 1 . In contrast, the rotating braking part 21B of the second braking unit 19 is connected to the output part 16B of the second distribution unit 9 in a rotationally fixed manner. Strictly speaking, the rotating brake part 21 B of the second brake unit 19 is non-rotatably connected to the second sun wheel element 29 of the second distribution unit 9 and to a shaft 35 of a second output 33 of the axle drive device 1 .

Furthermore shows 1 that the first and second brake unit 18, 19 each comprise a disk set 22 with first disk elements 23 and second disk elements 24 and an actuating actuator 25, which moves the disk elements 23, 24 together in order to convert rotational energy into thermal energy.

In addition, the first and second brake units 18, 19 have spring means (not shown), such as e.g. B. a plate spring, the spring force acts on the first and second lamellar elements 23, 24 and which acts against the force of the actuating actuator 25 in order to return the actuating actuator 25 to its initial position or to release the first and second lamellar elements 23, 24 from mutual engagement.

The first lamellar elements 23 are arranged in a rotationally fixed manner on the inside of the stationary brake part 20A, 20B or inside of the housing 6, whereas the second lamellar elements 24 are arranged in a rotationally fixed manner on the outside of the rotating brake part 21A, 21B.

In addition, 1 shown that the transmission device 3A has a planetary gear 5A, which has a sun wheel element 4A and various planetary elements 26 and a ring gear 27 . The ring gear 27 is fixed to the housing 6 of the axle drive device 1, with the sun gear element 4A forming the input 4 of the transmission device 3A. The sun wheel element 4A or the input 4 of the transmission device 3A is connected in a torque-proof manner to the shaft 2G of the electric machine 2A.

A planetary carrier 5B, which interconnects the planetary elements 26 of the planetary gear 5A, forms the output 5.

Furthermore shows 1 that the axle drive device 1 has a first output side S1 for connection to a first vehicle wheel of a vehicle and a second output side S2 for connection to a second vehicle wheel of a vehicle.

The first and second output sides S1, S2 are arranged at opposite ends or sides of the electric machine 2A or the axle drive device 1.

The axle drive device 1 has a first output 32 for a first vehicle wheel of a vehicle and a second output 33 for a second vehicle wheel of a vehicle.

The first output 32 leads an output variable, which flows from the electric machine 2A via the transmission device 3A to the first output 32, to a first vehicle wheel on the first output side S1.

The first output 32 has a shaft 34 which is non-rotatably connected to the output part 16B of the second distribution unit 9 of the distribution device 7 in order to transmit a torque and a speed from the distribution unit 9 to a vehicle wheel.

Strictly speaking, the shaft 34 is non-rotatably connected to the first sun gear element 28 of the second distribution unit 9 in order to carry torque and speed from the second distribution unit 9 to a vehicle wheel.

Further, the shaft 34 is non-rotatably connected to the rotary brake part 21A of the first brake unit 18 of the brake device 17 to reduce torque and speed from the shaft 34 of the first output 32 .

In contrast, the second output 33 leads output variables, which flow from the electric machine 2A via the transmission device 3A to the second output 33, to a second vehicle wheel on the second output side S2.

Furthermore, the second output 33 has a shaft 35 which is non-rotatably connected to the output part 16A of the first distribution unit 8 of the distribution device 7 in order to lead a torque and a speed from the distribution unit 8 to a vehicle wheel.

In addition, the shaft 35 is non-rotatably connected to the second sun gear element 29 of the second distributor unit 9 of the distributor device 7 and to the rotating brake part 21B of the second brake unit 19 of the brake device 17 in order to transmit torque and speed to or from the second output 33 To reduce distribution unit 9.

According to 1 the shaft 2G of the electrical machine 2A is designed as a hollow shaft. Furthermore, the shaft 35 of the second output 33 is arranged inside the shaft 2G of the electrical machine 2A, which is designed as a hollow shaft, in order to lead output variables of the electrical machine 2A from the one or first output side S1 to the other or second output side S2.

In 1 is - briefly summarized - an electric axle or an axle drive device 1 with a distribution device 7 or with a first and a second distribution unit 8, 9 and with a braking device 17 or with a first and a second braking unit 18, 19 is shown.

The second embodiment will be explained below 1 described in its function.

The electric machine 2 guides the torque generated into the transmission device 3A or into the planetary gear 5A via its shaft 2G, which is designed as a hollow shaft.

After the speed and torque have been converted in the transmission device 3A, the torque and a speed arrive from the planetary carrier 5B of the output 5 of the electrical machine 2A to the input part 15A of the first distribution unit 8. By moving the first and second disk elements 12, 13 of the disk pack 11 of the first distribution unit 8 together, the torque can be guided from the output 5 of the transmission device 3A to the shaft 35 of the second output 33.

Furthermore shows 1 that on the shaft 35, the second brake unit 19 of the braking device 17 or its rotating braking part 21 B is arranged in a rotationally fixed manner. By moving the disk elements 23, 24 of the disk pack 22 of the second brake unit 19 together, the shaft 35 of the second output 33 can be slowed down separately. In this way, the torque and the speed of the shaft 35 can be reduced in a targeted manner.

Also shows 1 that the second distribution unit 9 - implemented as a spur gear differential - includes an input part 15B, which is designed as a differential carrier and is non-rotatably connected to the output 5 of the transmission device 3 or to the planetary carrier 5B of the output 5 of the transmission device 3. The first and second planetary elements 30, 31 are rotatably arranged on the input part 15B or on its side walls (not shown). The first planetary elements 30 mesh with the first sun gear element 28 and the second planetary elements 31 , with the second planetary elements 31 meshing with the second sun gear element 29 and with the first planetary elements 30 . The second distribution unit 9 thus assumes the function of a differential and compensates for differences in the speeds of the abrasions 32, 33, whereas the torque on both output sides S1, S2 remains the same.

Furthermore shows 1 that with the shaft 35 of the second output 33, the second sun wheel element 29 and - as already mentioned - the output part 15A of the first distribution unit 8 is rotatably connected. The first sun wheel element 28 is connected in a rotationally fixed manner to the shaft 34 of the first output.

Furthermore, the first brake unit 18 of the brake device 17 or its rotating brake part 21A is arranged on the first shaft 34 in a rotationally fixed manner. By moving the disk elements 23, 24 of the disk pack 22 of the first brake unit 18 together, the shaft 34 of the first output 32 can be slowed down separately. In this way, the torque and the speed of the shaft 34 can be reduced in a targeted manner.

In a driving scenario, for example, if the second output 33 or a vehicle wheel attached to it has less friction with a road than the first output 32, the second distribution unit 9 distributes a larger proportion of the speed to the first output 32. This behavior of the second distribution unit 9, the first distribution unit 8 can bring its first and second lamellar elements 12, 13 into contact by means of the actuating actuator 14. As a result, the speed between the output 5 of the transmission device 3A and the shaft 35 of the second output 33 is adjusted. In this way, a locking differential can be implemented.

In other words, shows 1 an integrally formed electric axle drive device 1, with a controlled differential lock in lamellar design (eLSD) or the first distribution unit 8 being arranged in the rotor 2E. As a variant, the differential lock or the first distribution unit 8 could also be passive, ie as a so-called passive multi-plate locking differential or as a simple LSD (Limited Slip Differential). It is also possible to control the first distribution unit 8 in such a way that only two states can be implemented, namely an open and a closed state.

2 shows a schematic view of an integrally formed electric axle drive device 1 according to a second embodiment.

Due to the fact that the embodiment of 2 almost identical to the embodiment according to 1 is, the explanations of the first embodiment apply analogously to the second.

When comparing the 1 and 2 immediately noticeable that in 2 the second braking unit 19 on the second output side S2 is absent. Thus, the shaft 35 of the second output 33 cannot be slowed down separately.

In other words, shows 2 a variant with rotor-integrated eLSD clutch or first distribution unit 8 and only one brake unit 18 on the side shaft or shaft 34.

3 shows a schematic view of an integrally formed electric axle drive device 1 according to a third embodiment.

The integrally formed electric axle drive device 1 for driving one or more vehicle wheels of an electric or hybrid vehicle has an electric machine 2A with a stator 2C, a rotor 2E and a shaft 2G which is non-rotatably connected to the rotor 2E.

Furthermore, the axle drive device 1 has a transmission device 3A with an input 4 and an output 5, the input 4 with the Shaft 2G and connected to the rotor 2E, and wherein the output 5 is connectable to one or more vehicle wheels.

As in 3 shown, the transmission device 3A has a planetary gear 5A, which includes a sun gear element 4A and various planetary elements 26 and a ring gear 27 . The ring gear 27 is fixed to a housing 6 of the axle drive device 1 . The sun wheel element 4A forms the input 4 of the transmission device 3A. Furthermore, a planetary carrier 5B, which connects the planetary elements 26 to one another, forms the output 5.

Furthermore shows 3 that the sun wheel element 4A or the input 4 of the transmission device 3A is connected in a torque-proof manner to the shaft 2G and to the rotor 2E.

Also shows 3 that the final drive device 1 has a housing 6 for enclosing and delimiting the final drive device 1 .

The axle drive device 1 also has a distribution device 7 for dividing, forwarding and/or interrupting output variables from the transmission device 3A and the electric machine 2A, such as speed and torque, to one or more vehicle wheels.

The distribution device 7 comprises two distribution units 8, 9, with a first distribution unit 8 being designed similarly to a clutch device, so that the transmission device 3A can be releasably connected to one or more vehicle wheels in order to split, redistribute or interrupt output variables from the transmission device 3A to outputs 32, 33 of the axle drive device 1 to control or monitor.

Described in detail, the distribution device 7 has two distribution units 8, 9 or a first and a second distribution unit 8, 9, with both distribution units 8, 9 connecting the output 5 of the transmission device 3A to one or more vehicle wheels in order to split, forward and/or to realize an interruption of the output variables of the transmission device 3A and the electric machine 2A to one or more vehicle wheels.

As already mentioned, the first distribution unit 8 is designed similarly to a clutch device, with the first distribution unit 8 comprising a disk set 11 with first disk elements 12 and second disk elements 13 and an actuating actuator 14, which moves the disk elements 12, 13 together in order to transmit torque. The actuating actuator 14 is arranged on the housing 6 .

In addition, the first distribution unit 8 has a spring device (not shown), such as. B. a disc spring, the spring force of which acts on the first and second lamellar elements 12, 13 and which acts against the force of the actuating actuator 14 in order to reset the actuating actuator 14 to its initial position or to release the first and second lamellar elements 12, 13 from mutual engagement.

How 3 also shows, the first and second distribution unit 8, 9 each have an input part 15A, 15B, which is connected in a torque-proof manner to the output 5 of the transmission device 3A, in order to transmit output variables of the transmission device 3A from the output 5 of the transmission device 3A via the input part 15A, 15B in the respective distribution unit 8, 9 initiate. The input parts 15A, 15B of the first and second distribution unit 8, 9 are connected to one another in a rotationally fixed manner.

On the input part 15A of the first distribution unit 8, first lamellar elements 12 of the lamellar set 11 of the first distribution unit 8 are arranged on the outside in a rotationally fixed manner.

In addition, shows 3 that the first and second distribution unit 8, 9 each have an output part 16A, 16B, which is non-rotatably connected to a shaft 34, 35 of a first and a second output 32, 33 of the axle drive device 1. In this case, the output part 16B of the second distribution unit 9 has sun wheel elements 28, 29 - more on this below.

On the output part 16A of the first distribution unit 8, second disk elements 13 of the disk pack 11 of the first distribution unit 8 are arranged on the inside in a rotationally fixed manner. The output part 16B or the first sun wheel element 28 of the second distribution unit 9 is connected in a rotationally fixed manner to the output part 16A of the first distribution unit 8 via a shaft 35 of a first output 32 of the axle drive device 1 .

According to 3 the input parts 15A, 15B are designed similar to a differential carrier or similar to a hollow shaft, with the output part 16A of the first distribution unit 8 also being designed similar to a disk carrier.

As already mentioned, the distribution device 7 has a second distribution unit 9 for compensating for the output variables of the transmission device 3A, such as speed and torque.

According to 3 the second distribution unit 9, like the first distribution unit 8, is arranged outside of the rotor 2E of the electric machine 2A, but is designed as a spur gear.

Thus, the second distribution unit 9 has a differential carrier as the input part 15B, which is non-rotatably connected to the output 5 of the transmission device 3A or to the planetary carrier 5B of the transmission device 3A.

Furthermore--as already indicated--the second distribution unit 9 has a first and a second sun wheel element 28, 29 as an output part 16B, each of which can be connected to a vehicle wheel. Furthermore, the second distribution unit 9 has a plurality of pairs of first and second planetary elements 30, 31, the first planetary elements 30 meshing with the first sun gear element 28 and with the second planetary elements 31, and the second planetary elements 31 meshing with the second sun gear element 29 and with the first planetary elements 30 are engaged.

In addition, the first sun gear element 28 is non-rotatably connected to a first output 32 of the axle drive device 1 or to its shaft 34 , the second sun gear element 29 being non-rotatably connected to a second output 33 of the axle drive device 1 or to its shaft 35 .

With a view to 3 it can thus be seen that the output part 16B of the second distribution unit 9 has two sun wheel elements 28, 29 of a spur gear.

Furthermore shows 3 that the axle drive device 1 has a braking device 17 for the complete or partial braking or slowing down of one or more vehicle wheels.

The braking device 17 comprises a first and second braking unit 18, 19, the two braking units 18, 19 being designed similarly to a clutch device, so that one or more vehicle wheels or output drives 32, 33 of the axle drive device 1 can be slowed down in a controlled manner by means of a braking torque generated by them.

So has - according to 3 - the first and second brake units 18, 19 each have a fixed brake part 20A, 20B formed by the housing 6 and a rotating brake part 21A, 21B each.

The rotating brake part 21A, 21B is designed similar to a disk carrier. Furthermore, the rotating brake part 21A of the first brake unit 18 is connected in a torque-proof manner to a shaft 34 of a first output 32 of the axle drive device 1 . Specifically described, the rotating braking part 21A of the first braking unit 18 is formed in one piece with the output part 16A of the first distribution unit 8 of the distribution device 7 .

The rotating braking part 21B of the second braking unit 19, on the other hand, is connected in a rotationally fixed manner to an output part 16B of the second distribution unit 9 of the distribution device 7. Strictly speaking, as already mentioned, the rotating brake part 21B of the second brake unit 19 is non-rotatably connected to a second sun wheel element 29 of the second distribution unit 9 and to a shaft 35 of a second output 33 of the axle drive device 1 .

Both the first and the second brake unit 18, 19 have a disk pack 22 with first disk elements 23 and second disk elements 24 and an actuating actuator 25 which moves the disk elements 23, 24 together in order to convert rotational energy into thermal energy.

Furthermore, the first and second brake unit 18, 19 each have a spring device (not shown), such as. B. a disc spring, the spring force of which acts on the first and second lamellar elements 23, 24 and which acts against the force of the actuating actuator 25 in order to return the actuating actuator 25 to its initial position or to release the first and second lamellar elements 23, 24 from mutual engagement.

According to 3 the first lamellar elements 23 are arranged in a rotationally fixed manner on the inside of the stationary brake part 20A, 20B or inside of the housing 6, whereas the second lamellar elements 24 are arranged in a rotationally fixed manner on the outside of the rotating brake part 21A, 21B.

Furthermore shows 3 that the axle drive device 1 has a first output side S1 for connection to a first vehicle wheel of a vehicle and a second output side S2 for connection to a second vehicle wheel of a vehicle.

The first and second output sides S1, S2 are arranged at opposite ends or sides of the electric machine 2A and the axle drive device 1, respectively.

As already indicated several times, the axle drive device 1 has a first output 32 for a first vehicle wheel of a vehicle and a second output 33 for a second vehicle wheel of a vehicle.

The first output 32 leads output variables, which flow from the electric machine 2A via the transmission device 3A to the first output 32, to a first vehicle wheel on the first output side S1. On the other hand, the second output 33 leads to output variables from the electric machine 2A via the transmission device 3A second output 33 flow to a second vehicle wheel on the second output side S2.

According to 3 the first output 32 has a shaft 34, which leads a torque and a speed to the first output side S1 of the axle drive device 1. Furthermore, the second output 33 has a shaft 35 which carries a torque and a speed to the second output side S2 of the axle drive device 1 .

The shaft 34 is non-rotatably connected to the output part 16B or to the first sun gear element 28 of the second distribution unit 9 of the distribution device 7 in order to transmit a torque and a speed from the second distribution unit 9 of the distribution device 7 to a vehicle wheel.

Further, the shaft 34 is non-rotatably connected to the rotary brake part 21A of the first brake unit 18 of the brake device 17 to reduce torque and speed from the shaft 32 of the first output 32 .

The shaft 35 is - according 3 - non-rotatably connected to the output part 16B of the second distribution unit 9 of the distribution device 7 in order to lead a torque and a speed from the corresponding distribution unit 9 to a vehicle wheel.

Strictly speaking, the shaft 35 is non-rotatably connected to the second sun gear element 29 of the second distribution unit 9 of the distribution device 7 and to the rotating brake part 21B of the second brake unit 19 of the brake device 17 in order to transmit torque and speed to or from the second output 33 second distribution unit 9 to reduce.

Furthermore shows 3 that the shaft 2G of the electrical machine 2A is designed as a hollow shaft. The shaft 35 of the second output 33 is arranged inside the shaft 2G of the electrical machine 2A, which is designed as a hollow shaft, in order to lead output variables of the electrical machine 2A from the one or first output side S1 to the other or second output side S2.

Furthermore, it is noticeable that in 3 the first braking unit 18 together with the first distribution unit 8 and the second distribution unit 9 on the first output side S1 are nested radially relative to one another or offset radially relative to one another. Thus, axial space can be saved.

In 3 is - briefly summarized - an electric axle or an axle drive device 1 with a distribution device 7 or with a first and a second distribution unit 8, 9 and with a braking device 17 or with a first and a second braking unit 18, 19 is shown.

The third embodiment will be explained below 3 described in its function.

The electric machine 2 guides the torque generated into the transmission device 3A or into the planetary gear 5A via its shaft 2G, which is designed as a hollow shaft.

After the speed and torque have been converted in the transmission device 3A, the torque and a speed arrive from the planetary carrier 5B of the output 5 of the electric machine 2A to the input part 15A of the first distribution unit 8. By moving the first and second disk elements 12, 13 of the disk pack 11 of the In the first distribution unit 8, the torque can be guided from the output 5 of the transmission device 3A to the shaft 34 of the first output 32.

Furthermore shows 3 that on the shaft 34, the first brake unit 18 of the braking device 17 or its rotating braking part 21 A is arranged in a rotationally fixed manner. By moving the disk elements 23, 24 of the disk pack 22 of the first brake unit 18 together, the shaft 34 of the first output 32 can be slowed down separately. In this way, the torque and the speed of the shaft 34 can be reduced in a targeted manner.

Also shows 3 that the second distribution unit 9 - implemented as a spur gear differential - includes an input part 15B, which is designed as a differential carrier and is non-rotatably connected to the output 5 of the transmission device 3 or to the planetary carrier 5B of the output 5 of the transmission device 3. The first and second planetary elements 30, 31 are rotatably arranged on the input part 15B or on its side walls (not shown). The first planetary elements 30 mesh with the first sun gear element 28 and the second planetary elements 31 , with the second planetary elements 31 meshing with the second sun gear element 29 and with the first planetary elements 30 . The second distribution unit 9 thus assumes the function of a differential and compensates for differences in the speeds of the abrasions 32, 33, whereas the torque on both output sides S1, S2 remains the same.

Furthermore shows 3 that with the shaft 35 of the second output 33, the second sun gear 29 of the second distribution unit 9 is rotatably connected. The first sun wheel element 28 is connected in a rotationally fixed manner to the shaft 34 of the first output.

Furthermore, on the second shaft 35, the second brake unit 19 of the braking device 17 or their rotating brake part 21 B rotatably arranged. By moving the disk elements 23, 24 of the disk pack 22 of the second brake unit 19 together, the shaft 35 of the second output 33 can be slowed down separately. In this way, the torque and the speed of the shaft 35 can be reduced in a targeted manner.

In a driving scenario, for example, if the second output 33 or a vehicle wheel attached to it has less friction with a road than the first output 32, the second distribution unit 9 distributes a larger proportion of the speed to the first output 32. This behavior of the second distribution unit 9, the first distribution unit 8 can bring its first and second lamellar elements 12, 13 into contact by means of the actuating actuator 14. As a result, the speed between the output 5 of the transmission device 3A and the shaft 34 of the first output 32 is adjusted. In this way, a locking differential can be implemented.

In other words, shows 3 an integrally formed electric axle drive device 1, wherein a controlled differential lock in lamellar design (eLSD) or the first distribution unit 8 is arranged. As a variant, the differential lock or the first distribution unit 8 could also be passive, ie as a so-called passive multi-plate locking differential or as a simple LSD (Limited Slip Differential). It is also possible to control the first distribution unit 8 in such a way that only two states can be implemented, namely an open and a closed state.

4 shows a schematic view of an integrally formed electric axle drive device 1 according to a fourth embodiment.

Due to the fact that the embodiment of 4 very similar to the embodiment 3 is, the explanations of the third embodiment apply analogously to the fourth.

When comparing the 3 and 4 immediately noticeable that in 4 the first braking unit 18 together with the first distribution unit 8 on the first output side S1 are offset axially to the second distribution unit 9. The first distribution unit 8 and the first brake unit 18 are radially offset from one another in order to save axial space.

In other words, shows 4 a variant with an alternative arrangement of the eLSD clutch or the distribution unit 8, namely axially next to the differential or next to the second distribution unit 9 and radially nested with the first brake unit 18, the two brake units 18,19 being identical in construction.

5 shows a schematic view of an integrally formed electric axle drive device 1 according to a fifth embodiment. Shows in more detail 5 an integrally formed electric axle drive device 1 for driving one or more vehicle wheels of an electric or hybrid vehicle.

According to 5 the axle drive device 1 has two electrical machines 2A, 2B, each with a stator 2C, 2D, a rotor 2E, 2F and a shaft 2G, which is non-rotatably connected to the corresponding rotor 2E, 2F.

In addition, shows 5 that the axle drive device 1 has two transmission devices 3A, 3B, each with an input 4 and an output 5 each.

Each input 4 is connected to the shaft 2G, 2H and to the rotor 2E, 2F, with the output 5 being connectable to one or more vehicle wheels.

In addition, the axle drive device 1 has a housing 6 for enclosing and delimiting the axle drive device 1.

Furthermore shows 5 that the axle drive device 1 has a distribution device 7 for dividing, forwarding and/or interrupting output variables of the transmission devices 3A, 3B and the electric machines 2A, 2B, such as speed and torque, to a plurality of vehicle wheels.

The distribution device 7 has three distribution units 8, 9, 10, namely a first 8, a second 9 and a third distribution unit 10. The distribution units 8, 9, 10 and the distribution device 7 are designed similar to a clutch device, so that the transmission devices 3A, 3B can be releasably connected to a plurality of vehicle wheels in order to control the splitting, further splitting and interrupting of the output of the transmission devices 3A, 3B to one or more vehicle wheels or to outputs 32, 33 of the final drive device 1.

The distribution device 7 or the three distribution units 8, 9, 10 of the distribution device 7 are arranged inside or inside the rotors 2E, 2F of the electrical machines 2A, 2B.

The outer dimensions of the respective rotor 2E, 2F of the electrical machine 2A, 2B exceed the outer dimensions of the first and second or the third distribution unit 8, 9, 10, so that in the axial and radial direction A, R the corresponding rotor 2E, 2F the Distribution units 8, 9, 10 towers over, whereby Installation space or space in the axial and radial direction A, R can be saved, by which the axle drive device 1 can be made shorter in comparison to solutions from the prior art.

Described more precisely, the outer dimensions of the rotor 2E of the electrical machine 2A, such as length, width and height, exceed the outer dimensions of the first and second distribution units 8, 9, such as length, width and height. The same applies to the outer dimensions of the rotor 2F of the electrical machine 2B and to the outer dimensions of the third distribution unit 10.

As in 5 shown, the first 8 or third distribution unit 10 connects the output 5 of the respective transmission device 3A, 3B to a vehicle wheel in order to split, forward and/or interrupt output variables from the transmission devices 3A, 3B and the electric machines 2A, 2B into one to realize vehicle wheel.

As already mentioned, the first, second and third distribution unit 8, 9, 10 are designed similar to a clutch device and each has a disk pack 11 with first disk elements 12 and second disk elements 13 and an actuating actuator 14, which moves the disk elements 12, 13 together to produce torque transmission. In this case, each actuating actuator 14 is arranged inside the corresponding rotor 2E, 2F of the electrical machines 2A, 2B.

Furthermore, the first, second and third distribution unit 8, 9, 10 have a spring device (not shown), such as e.g. B. a disc spring, the spring force of which acts on the first and second lamellar elements 12, 13 and which acts against the force of the actuating actuator 14 in order to reset the actuating actuator 14 to its initial position or to release the first and second lamellar elements 12, 13 from mutual engagement.

According to 5 each distribution unit 8, 9, 10 has an input part 15A, 15B, 15C, the input part 15A, 15C of the first and third distribution unit 8, 10 being non-rotatably connected to the output 5 of the transmission device 3A or 3B, respectively, in order to output variables of the transmission device 3A, 3B from the output 5 of the respective transmission device 3A, 3B via the corresponding input part 15A, 15C into the first and third distribution unit 8, 10.

In contrast, the input part 15B of the second distribution unit 9 is connected to a shaft 34 of a first output 32 of the axle drive device 1 .

In addition, shows 5 that the first, second and third distribution unit 8, 9, 10 each have an output part 16A, 16B, 16C. The output parts 16B, 16C of the second and third distribution unit 9, 10 are connected to a shaft 35 of a second output 33 of the axle drive device 1 in a rotationally fixed manner.

The output part 16A of the first distribution unit 8 is connected in a torque-proof manner to a shaft 34 of a first output 32 of the axle drive device 1 .

All input parts 15A, 15B, 15C and all output parts 16A, 16B, 16C are designed similar to a disk carrier.

Likewise, on all input parts 15A, 15B, 15C of the first, second and third distribution unit 8, 9, 10, first lamellar elements 12 of the lamina set 11 of the first, second and third distribution unit 8, 9, 10 are arranged in a rotationally fixed manner on the inside and outside.

On the output parts 16A, 16B, 16C of the first, second and third distribution unit 8, 9, 10, second disk elements 13 of the disk pack 11 of the first, second and third distribution unit 8, 9, 10 are arranged in a rotationally fixed manner on the outside and inside.

Strictly speaking, the output part 16B of the second distribution unit 9 is non-rotatably connected to the output part 16C of the third distribution unit 10 via a shaft 35 of a second output 33 of the axle drive device 1 .

Furthermore, the input part 15B of the second distribution unit 9 is non-rotatably connected to the output part 16A of the first distribution unit 8 via a shaft 34 of a first output 32 of the axle drive device 1 .

As in 5 shown, each transmission device 3A, 3B has a planetary gear 5A, which includes a sun gear element 4A and various planetary elements 26 and a ring gear 27 . The ring gear 27 is fixed to the housing 6 of the axle drive device 1, with the sun gear element 4A forming the input 4 of the respective transmission device 3A, 3B.

A planetary carrier 5B, which connects the planetary elements 26 to one another, forms the output 5. The sun wheel element 4A or the input 4 of the transmission devices 3A, 3B is connected to the shaft 2G or 2H and to the rotor 2E or 2F of the corresponding electrical machine 2A, 2B rotatably connected.

As in 5 to recognize, the axle drive device 1 has a first output side S1 for connection to a first vehicle wheel Vehicle and a second output side S2 for connection to a second vehicle wheel of a vehicle.

The first and second output sides S1, S2 are arranged at opposite ends or sides of the axle drive device 1.

Furthermore, the axle drive device 1 has a first output 32 for a first vehicle wheel of a vehicle and a second output 33 for a second vehicle wheel of a vehicle.

The first output 32 leads the output variables, which flow from the electric machine 2A via the transmission device 3A to the first output 32, to a first vehicle wheel on the first output side S1.

In contrast, the second output 33 leads the output variables, which flow from the electric machine 2B via the transmission device 3B to the second output 33, to a second vehicle wheel on the second output side S2.

According to 5 the first output 32 has a shaft 34 which supplies torque and speed to a first vehicle wheel on the first output side S1, the second output 33 also comprises a shaft 35 which supplies torque and speed to a second vehicle wheel on the second Output side S2 leads.

The shaft 34 is connected in a rotationally fixed manner to an output part 16A of the first distribution unit 8 of the distribution device 7 in order to transmit a torque and a speed from the distribution unit 8 to a vehicle wheel.

Furthermore, the shaft 34 is non-rotatably connected to an output part 16B of the second distribution unit 9 of the distribution device 7 in order to carry a torque and a speed from the second distribution unit 9 of the distribution device 7 to a vehicle wheel.

In addition, the shaft 35 is non-rotatably connected to the output parts 16B, 16C of the second and third distribution units 9, 10 of the distribution device 7 in order to lead torque and speed from the corresponding distribution unit 9, 10 to a vehicle wheel.

As in 5 shown, the shafts 2G, 2H of the electrical machines 2A, 2B are designed as hollow shafts.

The shaft 35 of the second output 33 and the shaft 34 of the first output 32 are arranged inside the shaft 2G, 2H, which is designed as a hollow shaft, of the corresponding electrical machine 2A, 2B in order to transmit the output variables of the electrical machines 2A, 2B from the distribution units 8, 9 , 10 to be discharged at the first or second output side S1, S2.

Briefly summarized is in 5 an E-axle or an axle drive device 1 with a distribution device 7 or with a first, second and a third distribution unit 8, 9, 10 is shown.

The fifth embodiment will be explained below 5 described in its function.

The electric machine 2A guides the generated torque into the transmission device 3A or into the planetary gear 5A via its shaft 2G, which is designed as a hollow shaft.

The planet carrier 5B is connected to the input part 15A of the first distribution unit 8 in a rotationally fixed manner. The output part 16A is non-rotatably connected to the shaft 33 of the first output 32 . By moving the first and second disk elements 12, 13 of the disk pack 11 of the first distribution unit 8 together, the torque can be guided from the output 5 of the transmission device 3A to the shaft 33.

The same applies to the third distribution unit 10. Here, the electric machine 2B guides the generated torque into the transmission device 3B or into the planetary gear 5A via its shaft 2H, which is designed as a hollow shaft.

The shaft 2H is connected in a rotationally fixed manner to the input part 15C of the third distribution unit 10 . The output part 16C is non-rotatably connected to the shaft 35 of the second output 34 . By moving the first and second disk elements 12, 13 of the disk pack 11 of the third distribution unit 10 together, the torque can be guided from the output 5 of the transmission device 3B to the shaft 35.

The input part 15B of the second distribution unit 9 is connected to the shaft 34 of the first output 32 , whereas the output part 16B of the second distribution unit 9 is connected to the shaft 33 of the second output 35 .

By moving the first and second disk elements 12, 13 of the disk pack 11 of the second distribution unit 9 together, the shafts 34, 35 of the first and second output can be connected to one another in a torque-proof manner.

Thus, the axle drive device 1 with its electrical machines 2A, 2B, the shafts 34, 35 separately or individually with a torque ment supply or both shafts 34, 35 can be supplied with torque together by both or only by an electric machine 2A, 2B.

In other words, shows 5 an integrally formed electric axle drive device 1, wherein a controlled differential lock in lamellar design (eLSD) or the second distribution unit 9 is arranged. As a variant, the differential lock or the second distribution unit 9 could also be passive, ie as a so-called passive multi-plate locking differential or as a simple LSD (Limited Slip Differential).

To put it another way, shows 5 a so-called twin axle, each with a disconnect clutch or first and third distribution unit 8, 10 and a lock or second distribution unit 9, which mechanically connects the two shafts 34, 35. This variant could, for. B. can be used to improve traction on a twin axle. It is also possible to control the first and third distribution unit 8, 10 in such a way that only two states can be implemented, namely an open and a closed state.

6 shows a schematic view of an integrally formed electric axle drive device 1 according to a sixth embodiment.

Due to the fact that the embodiment of 6 very similar to the embodiment 5 is, the explanations of the fifth embodiment apply analogously to the sixth.

When comparing the 5 and 6 immediately noticeable that in 6 the axle drive device 1 additionally has a braking device 17 for the complete or partial braking or slowing down of one or more vehicle wheels.

The braking device 17 has a first braking unit 18 which is designed similarly to a clutch device, so that one or more vehicle wheels or output drives 32, 33 of the axle drive device 1 can be slowed down in a controlled manner by means of a braking torque generated by this.

In addition, the first brake unit 18 has a fixed brake part 20A and a rotating brake part 21A, with the fixed and the rotating brake part 20A, 21A each being designed similarly to a disk carrier.

The stationary brake part 20A is also connected to the housing 6 of the axle drive device 1 in a rotationally fixed manner. The rotary brake part 21A of the first brake unit 18 is - like 6 shows - with the shaft 35 of the second output 33 of the axle drive device 1 rotatably connected.

In other words, the rotating brake part 21B of the first brake unit 18 is connected to the output parts 16B, 16C of the second and third distribution unit 9, 10 of the distribution device 7 in a rotationally fixed manner.

The first brake unit 18 has a disk set 22 with first disk elements 23 and second disk elements 24 and an actuating actuator 25, which moves the disk elements 23, 24 together in order to convert rotational energy into thermal energy.

Also, the first brake unit 18 has spring means (not shown), such as e.g. B. a disc spring, the spring force of which acts on the first and second lamellar elements 23, 24 and which acts against the force of the actuating actuator 25 in order to return the actuating actuator 25 to its initial position or to release the first and second lamellar elements 23, 24 from mutual engagement.

According to 6 the first lamella elements 23 are non-rotatably arranged on the inside of the stationary brake part 20A, and the second lamella elements 24 are arranged non-rotatably on the outside of the rotating brake part 21A.

In the event that the second distribution unit 9 does not connect the shafts 34 and 35, the first brake unit 18 can separately slow down the shaft 35 and thus a vehicle wheel on the second output side S2.

However, when the second distribution unit 9 connects the shafts 34 and 35 to each other, the first braking unit 18 can simultaneously slow down the shafts 34 and 35 and thus a vehicle wheel on the first and on the second output side S1, S2.

In other words, shows 6 a variant of 5 , namely with an additional brake unit 18. In this case, the first brake unit 18 acts on the (lockable) side shaft or shaft 35. Alternatively, it could also be placed on the engine side.

Reference List

1

final drive device

2A, 2B

electric machine

2C, 2D

stator

2E, 2F

rotor

2G, 2H

Wave

3A, 3B

gear mechanism

4

Entry

4A

sun gear element

5

Exit

5A

planetary gear

5B

planet carrier

6

Housing

7

distribution facility

8th

first distribution unit

9

second distribution unit

10

third distribution unit

11

plate pack

12

first lamella elements

13

second lamellar elements

14

actuation actuator

15A

Input part of the first distribution unit

15B

Input part of the second distribution unit

15C

Input part of the second distribution unit

16A

Output part of the first distribution unit

16B

Output part of the second distribution unit

16C

Output part of the second distribution unit

17

braking device

18

first brake unit

19

second brake unit

20A

fixed brake part of the first brake part

20B

fixed brake part of the second brake part

21A

rotating braking part of the first braking part

21B

rotating brake part of the second brake part

22

plate pack

23

first lamella elements

24

second lamellar elements

25

actuation actuator

26

planet element

27

ring gear

28

first sun gear element

29

second sun gear element

30

first planetary elements

31

second planetary elements

32

first downforce

33

second downforce

34

Wave

35

Wave

A

axial direction

R

radial direction

S1

first home page

S2

second exit page

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102019201989 [0002]

Claims (10)

Integrally designed electric axle drive device (1) for driving one or more vehicle wheels of an electric or hybrid vehicle, comprising: - at least one electric machine (2A, 2B) with a stator (2C, 2D), a rotor (2E, 2F) and a shaft ( 2G, 2H), which is non-rotatably connected to the rotor (2E, 2F), - at least one transmission device (3A, 3B) with an input (4) and an output (5), - the input (4) with the shaft (2G, 2H) and/or to the rotor (2E, 2F), - the outlet (5) being connectable to one or more vehicle wheels, and - a housing (6) for enclosing and delimiting the final drive device ( 1), characterized in that - the axle drive device (1) has a distribution device (7) for dividing, forwarding and/or interrupting at least one output variable of the at least one transmission device (3A, 3B) and/or the at least one electrical machine (2A, 2B) to one or more vehicle wheels, - the distribution device (7) having at least one distribution unit (8, 9, 10) which is designed similarly to a clutch device, so that the at least one transmission device (3A, 3B) can be connected to one or more vehicle wheels can be releasably connected in order to control the division, further division and/or interruption of at least one output variable of the at least one transmission device (3A, 3B) to one or more vehicle wheels or to outputs (32, 33) of the axle drive device (1). Axle drive device according to claim 1 , - wherein the distribution device (7) has at least one distribution unit (8, 9, 10) or a first (8), a second (9) and/or a third distribution unit (10) in order to divide, redistribute and/or interrupt to control at least one output variable of the at least one transmission device (3A, 3B) and/or the at least one electrical machine (2A, 2B) to one or more vehicle wheels, - the first (8), second (9) and/or third distribution unit (10) connects the output (5) of the at least one transmission device (3A, 3B) to one or more vehicle wheels in order to split, forward and/or interrupt at least one output variable of the at least one transmission device (3A, 3B) and/or the to implement at least one electrical machine (2A, 2B) to one or more vehicle wheels, and - wherein the first, second and/or third distribution unit (8, 9, 10) is designed similarly to a clutch device. Axle drive device according to claim 1 or 2 , - wherein a first, second and/or third distribution unit (8, 9, 10) of the distribution device (7) comprises a lamella pack (11) with first lamella elements (12) and second lamella elements (13) as well as an actuating actuator (14), which the lamella elements (12, 13) move together in order to produce a torque transmission, - first lamella elements (12) of the lamella pack being on at least one input part (15A, 15B, 15C) of the first, second and/or third distribution unit (8, 9, 10). (11) of the first, second and/or third distribution unit (8, 9, 10) are arranged in a rotationally fixed manner, and - wherein on at least one output part (16A, 16B, 16C) of the first, second and/or third distribution unit (8, 9 , 10) second disk elements (13) of the disk pack (11) of the first, second and/or third distribution unit (8, 9, 10) are arranged in a rotationally fixed manner. Axle drive device according to one of the preceding claims, - Wherein the distribution device (7) for compensating at least one output of the at least one transmission device (3A, 3B), such as. B. speed and / or torque, a second distribution unit (9), - wherein the first, second and/or third distribution unit (8, 9, 10) is arranged outside the rotor (2E, 2F) of the at least one electrical machine (2A, 2B), and - Wherein the second distribution unit (9) is designed as a spur gear differential. Axle drive device according to one of the preceding claims, - wherein a second distribution unit (8) of the distribution device (7) has a first and a second sun wheel element (28, 29), e.g. B. as an output part (16B), each of which can be connected to a vehicle wheel, - the second distribution unit (8) having a plurality of pairs of first and second planetary elements (30, 31), the first planetary elements (30) having the first sun gear element ( 28) and meshing with the second planetary elements (31), and wherein the second planetary elements (31) mesh with the second sun gear element (29) and with the first planetary elements (30), - the first sun gear element (28) with a first and/or second output (32, 33) of the axle drive device (1), in particular to its shaft or shafts (34, 35), in a rotationally fixed manner, and - the second sun wheel element (29) being connected to a second output (33) the final drive device device (1), for example with the shaft (35), is rotatably connected. Axle drive device according to one of the preceding claims, - wherein the axle drive device (1) has a braking device (17) for completely or partially braking or slowing down one or more vehicle wheels, - wherein the braking device (17) has at least one braking unit (18, 19) or a first and/or second braking unit (18, 19), - wherein the first and/or second brake unit (18, 19) is designed similarly to a clutch device, so that one or more vehicle wheels or output drives (32, 33) of the axle drive device (1) can be slowed down in a controlled manner by means of a braking torque generated by it. Axle drive device according to one of the preceding claims, - wherein a first and/or second brake unit (18, 19) of a brake device (17) of the axle drive device (1) comprises a fixed brake part (20A, 20B) and a rotating brake part (21A, 21B), - wherein the fixed brake part (20A, 20B) is non-rotatably connected to the housing (6) of the axle drive device (1), - wherein the fixed brake part (20A, 20B) is formed by the housing (6) of the axle drive device (1), - wherein the rotating brake part (21A) of the first brake unit (18) is non-rotatably connected to a shaft (34, 35) of a first and/or second output (32, 33) of the axle drive device (1). Axle drive device according to one of the preceding claims, - wherein a first and/or second brake unit (18, 19) of a brake device (17) of the axle drive device (1) comprises a disk pack (22) with first disk elements (23) and second disk elements (24) and an actuating actuator (25), which the lamellar elements (23, 24) move together to convert rotational energy into heat energy, - wherein the actuating actuator (25) is arranged on the housing (6) or inside the rotor (2E, 2F) of the at least one electrical machine (2A, 2B), - wherein the first lamellar elements (23) are arranged in a rotationally fixed manner on the inside or outside of the stationary brake part (20A, 20B) and/or inside or outside on the housing (6), and - The second lamellar elements (24) being arranged in a rotationally fixed manner on the inside or outside of the rotating braking part (21A, 21B). Axle drive device according to one of the preceding claims, - wherein the axle drive device (1) has a braking device (17) for completely or partially braking or slowing down one or more vehicle wheels, - wherein the braking device (17) has at least one braking unit (18, 19) or a first and/or second braking unit (18, 19), - wherein the distribution device (7) has at least one distribution unit (8, 9, 10) or a first (8), a second (9) and/or a third distribution unit (10), - wherein the first, second and/or third distribution unit (8, 9, 10) and the first and/or second brake unit (18, 19) are nested radially with respect to one another or arranged offset with respect to one another in the radial direction (R) in order to save installation space in the axial to save direction (A), and/or - wherein the first, second and/or third distribution unit (8, 9, 10) and the first and/or second brake unit (18, 19) are arranged nested axially with one another or nested with one another in the axial direction (A) in order to save installation space in the radial direction (R) to save. Axle drive device according to one of the preceding claims, - wherein the distribution device (7) or at least one distribution unit (8, 9, 10) of the distribution device (7) and/or a braking device (17) of the axle drive device (1) or at least one braking unit (18, 19) of the braking device (17) the axle drive device (1) inside or inside the rotor (2E, 2F) of the at least one electric machine (2A, 2B). - wherein the distribution device (7) or a first, second and/or third distribution unit (8, 9, 10) of the distribution device (7) comprises a disk pack (11) and/or an actuating actuator (14) which is or are inside the Rotor (2E, 2F) of the at least one electrical machine (2A, 2B) is arranged, and - wherein a brake device (17) of the axle drive device (1) or a first and/or second brake unit (18, 19) of a brake device (17) of the axle drive device (1) comprises a disk pack (22) and/or an actuating actuator (25), which is arranged inside the rotor (2E, 2F) of the at least one electrical machine (2A, 2B).

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