Drive assembly for a motor vehicle, and drive unit for an electric motor vehicle

Abstract

The invention relates to a drive assembly (2, 4) for a motor vehicle, having: - an electric machine (10, 20), - a transmission (30, 40), and - at least one vehicle braking device (50, 60), - wherein the at least one vehicle braking device (50, 60) comprises a multiple-disk brake (52, 62). The invention also relates to a drive unit (3) for an electric motor vehicle, comprising at least one drive assembly (2, 4).

Description

[0001] Drive arrangement for a motor vehicle and drive for an electric motor vehicle

[0002] The invention relates to a drive arrangement for a motor vehicle and a drive for an electric motor vehicle with a drive arrangement.

[0003] Various disc brakes are known from the state of the art.

[0004] For example, a so-called wheel-integrated, dry disc brake with a floating caliper or an internal disc brake. In both cases, the brakes are mounted on output shafts outside the transmission.

[0005] For example, the aforementioned disc brakes have the following disadvantages:

[0006] - Fine dust emissions due to abrasion / wear of brake disc and pad; and / or

[0007] - Fine dust enters the environment directly; and / or

[0008] - Friction coefficient fluctuations due to environmental influences (such as wetness); and / or

[0009] - Corrosion due to environmental influences (such as moisture); this particularly affects battery-powered electric vehicles, as they are less frequently braked with disc brakes; and / or

[0010] - Noise development; this particularly affects battery-powered electric vehicles, for example, as the background noise of an internal combustion engine is eliminated and therefore cannot mask noises during braking.

[0011] Against this background, it is the object of the present invention to provide a drive arrangement for a motor vehicle and a drive for an electric motor vehicle which can be produced cost-effectively and in a material-saving manner and which overcomes the disadvantages mentioned.

[0012] This problem is solved by the features of the independent patent claims. Further advantageous developments are the subject of the dependent claims.

[0013] A first aspect of the present invention comprises a drive assembly for a motor vehicle. The drive assembly comprises an electric motor, a transmission, and at least one vehicle braking device. The at least one vehicle braking device comprises a multi-disk brake. A multi-disk brake has the advantage of reducing particulate matter emissions. A multi-disk brake also exhibits reduced friction coefficient fluctuations, such as disc brakes. Furthermore, a multi-disk brake is very quiet and generates very little noise.

[0014] Furthermore, the multi-disk brake can be housed in a housing of the drive assembly in such a way that the escape of wear particles generated during braking from the housing can be prevented and / or environmental influences on the multi-disk brake can be reduced. Thus, a multi-disk brake in a housing can prevent the emission of particulate matter. Fluctuations in the coefficient of friction, which occur, for example, with disc brakes, can also be reduced using the housing. The housing also ensures that a multi-disk brake has very low noise levels.

[0015] In addition, the multi-disk brake can be integrated into the transmission, and / or the transmission and the multi-disk brake can be housed in a common housing of the drive assembly. This not only saves installation space but also increases the degree of integration, thereby reducing assembly costs for a vehicle.

[0016] Furthermore, the rotational axes of the electric machine, the transmission, individual components of the transmission, and / or the at least one vehicle braking device can be aligned and / or arranged coaxially. The rotational axes of the electric machine and the at least one vehicle braking device can also be aligned and / or arranged coaxially. This can be achieved using the transmission.

[0017] Additionally or alternatively, the axes of rotation of the electric machine, the transmission, individual components of the transmission, and / or the at least one vehicle braking device can be aligned and / or arranged in parallel or axially parallel. The axes of rotation of the electric machine and the at least one vehicle braking device can also be aligned and / or arranged in parallel or axially parallel. This can be achieved using the transmission. Furthermore, additionally or alternatively, the axes of rotation of the electric machine, the transmission, individual components of the transmission, and / or the at least one vehicle braking device can be aligned and / or arranged such that their axes of rotation intersect or are arranged and / or aligned at an angle to one another. This can be achieved using the transmission.The rotational axes of the electric machine and the at least one vehicle braking device can also be aligned and / or arranged such that their rotational axes intersect or are arranged at an angle to each other. For example, the rotational axes can be arranged and / or aligned at an angle of 30, 45, or 90 degrees to each other.

[0018] Furthermore, a rotational axis of the electric machine can be formed, for example, by its output shaft or shaft or torque shaft, which transmits or transfers a torque generated by the electric machine. A rotational axis of the transmission can be formed, for example, by its output shaft or a shaft of the transmission, which transmits or transfers a torque converted by the transmission.

[0019] An axis of rotation of the at least one vehicle braking device may be an axis about which at least a part of the at least one vehicle braking device rotates and on which the at least one vehicle braking device can act in order to achieve a braking effect.

[0020] Furthermore, the multi-disk brake can be oil-cooled. Alternatively, or additionally, the multi-disk brake and the transmission can share a common oil circuit. This allows the multi-disk brake and the transmission to be cooled by a shared oil circuit. This can reduce maintenance costs, as well as assembly and manufacturing costs.

[0021] Furthermore, the multi-disk brake can be designed as a wheel brake or as a vehicle wheel brake. With the help of the multi-disk brake, a vehicle or motor vehicle can be negatively accelerated or decelerated. The multi-disk brake can act on a vehicle wheel or on a wheel drive shaft of a drive.

[0022] It is also conceivable that the multi-disk brake or the at least one vehicle braking device is arranged or provided in the power transmission path downstream of the electric machine and / or downstream of the transmission, so that the multi-disk brake can act on a wheel drive shaft of a drive.

[0023] Alternatively or additionally, the multi-disk brake or the at least one vehicle braking device can be arranged or provided in the power transmission path starting from the electric machine downstream of the transmission, so that the multi-disk brake can act on a wheel drive shaft of a drive.

[0024] The closer the multi-disk brake is positioned to a vehicle wheel, the better the multi-disk brake can absorb and / or dissipate forces and / or torques. This also helps prevent torque-induced distortion of axles or shafts, thereby increasing the service life of the drive system with the multi-disk brake.

[0025] Furthermore, the multi-disk brake or the at least one vehicle braking device can be provided in the power transmission path between the electric machine and the transmission, so that the multi-disk brake can act on a shaft of the electric machine and / or on an input shaft of the transmission.

[0026] A second aspect of the present invention comprises a drive for an electric motor vehicle.

[0027] It is expressly pointed out that the features of the drive arrangement for a motor vehicle, as mentioned under the first aspect, can be used individually or in combination with one another in the drive for an electric motor vehicle.

[0028] In other words, the features mentioned above under the first aspect of the invention relating to the drive arrangement for a motor vehicle can also be combined here with further features under the second aspect of the invention.

[0029] A drive for an electric motor vehicle comprises at least one drive arrangement according to the first aspect.

[0030] The at least one drive arrangement is assigned to at least one vehicle wheel of the drive. Alternatively or additionally, the at least one drive arrangement forms an electric axle or an electric axle or electric drive axle. One drive arrangement can also be assigned to each vehicle wheel of the drive, and multiple drive arrangements can jointly or together form an electric axle or an electric axle or electric drive axle.

[0031] Furthermore, the at least one drive arrangement can comprise a single electric machine.

[0032] Furthermore, the drive can include an axle differential that is connected to the single electric motor in a power-transmitting manner. The axle differential can comprise, or be designed as, a spur gear differential or a bevel gear differential.

[0033] In addition, the drive can include two wheel drive shafts for transmitting power to the vehicle wheels. The axle differential can be coupled to the two wheel drive shafts, allowing torque to be transmitted.

[0034] Furthermore, it is possible for the wheel drive shafts to be detachably coupled to vehicle wheels via wheel coupling sections.

[0035] In addition, a disc brake can be assigned to each wheel drive shaft, thus increasing the braking effect.

[0036] Furthermore, the transmission can be arranged between the single electric machine and the axle differential.

[0037] Alternatively or additionally, the transmission may comprise a planetary gear, a spur gear, a bevel gear and / or a belt transmission.

[0038] However, it is also possible for the transmission to be designed as a planetary transmission, a spur gear transmission, a bevel gear transmission and / or a belt transmission.

[0039] In the following, the inventive concept presented above is expressed again and additionally in other words.

[0040] This idea concerns - in simplified terms - the replacement of a dry disc brake with an oil-cooled multi-disk brake and / or the integration of the multi-disk brake into a transmission or drive assembly, such as an electric drive axle, and / or the inclusion of the transmission and the multi-disk brake in a common housing of a drive assembly. This can reduce wear on the brake or the at least one vehicle braking device and prevent emissions into the environment; this is because the resulting abrasion can be bound in a cooling oil or oil. Furthermore, the multi-disk brake is not exposed to environmental influences within the housing of the drive assembly, which can extend its service life. Noise development can also be significantly reduced by integration into the housing of the drive assembly and / or the use of oil as a lubricant in the frictional contact.

[0041] Furthermore, as already indicated, various variants can be implemented for the arrangement of the rotational axes of the electric motor, the transmission, and the at least one vehicle braking device for the drive arrangement. This can also apply to the number of electric motors, transmissions, and vehicle braking devices.

[0042] Furthermore, it is possible, for example - as already mentioned - that the drive arrangement has coaxial, parallel or crossed axes of rotation.

[0043] A further distinction can be made by the different positions or arrangement of the electric motor, gearbox and multi-disk brake in relation to each other.

[0044] As already mentioned, coaxial designs are possible. For the sake of simplicity and brevity, the different arrangement options are briefly outlined, with the arrangement of the components from an imaginary vehicle center toward a vehicle wheel, i.e., toward the exterior of the vehicle or outward, being briefly described:

[0045] - 1 . Possibility: electric machine -> gearbox -> multi-disk brake; or

[0046] - 2nd option: gearbox -> electric motor -> multi-disk brake; or

[0047] - 3rd option: multi-disk brake -> gearbox -> electric machine; or

[0048] - 4th option: gearbox -> multi-disk brake -> electric machine, or

[0049] - 5th option: electric motor (located in the imaginary vehicle center) -> transmission (located in the imaginary vehicle center) -> axle differential (located in the imaginary vehicle center) -> multi-disk brakes or one multi-disk brake per vehicle wheel (located on the vehicle's outermost surfaces). Furthermore, as already mentioned, parallel-axis designs are possible. For the sake of simplicity and brevity, the different arrangement options are briefly outlined, with the arrangement of the components from an imaginary vehicle center toward a vehicle wheel, i.e., toward the vehicle's outermost surface or outward, being briefly described:

[0050] - 1st option: electric motor located outside or close to the vehicle exterior or close to a vehicle wheel; gearbox located close to an imaginary vehicle center; multi-disk brake located parallel to the axis of the electric motor; or

[0051] - 2nd option: electric motor located inside or close to an imaginary vehicle center; gearbox located outside or close to the vehicle exterior or close to a vehicle wheel; multi-disk brake located axially parallel to the electric motor; or

[0052] - 3rd option: electric motor arranged axially parallel to the axle differential and multi-disk brake by means of a gearbox; or

[0053] - 4th option: electric machine arranged axially parallel to the axle differential and multi-disk brake by means of a belt transmission.

[0054] Furthermore, as already mentioned, designs with crossed axes of rotation are possible. For the sake of simplicity and brevity, the different arrangement options are briefly outlined, with the arrangement of the components from an imaginary vehicle center toward the vehicle wheels being briefly described:

[0055] - 1st option: electric machine - axis of rotation arranged rotated by 90° compared to the axis of rotation of a vehicle wheel or a multi-disk brake, for example; and / or

[0056] - 2nd possibility: a height offset between the electric machine and the multi-disk brake is also possible; and / or

[0057] - 3rd option: one gear stage of the transmission can be designed as a bevel gear pair (the other gear stage can be a spur gear, planetary gear or belt gear); and / or

[0058] - 4th option: multi-disk brake can be arranged parallel to the vehicle wheel; and / or 5th option: electric motor, transmission (such as planetary and bevel gears) can have crossed axes of rotation to an axle differential and at least one multi-disk brake.

[0059] Furthermore, a drive system can be designed as a so-called performance electric axle. The drive system can have a separate drive for each of the two wheels of a vehicle axle. Thus, the drive system can comprise an electric motor and a transmission for each vehicle wheel. A differential can be omitted in this case, since no speed differences can arise between the electric motor and the respective wheel, for example, when cornering.

[0060] The electrical machines can be designed as radial flux machines (internal or external rotor) or as axial flux machines (I or H rotor).

[0061] Furthermore, it is possible for a drive arrangement to be designed as a so-called electric axle, which is designed to drive two vehicle wheels on a common axle. The drive arrangement can comprise one or a single electric motor and one or a single transmission.

[0062] Here, too, the electrical machine can be designed as a radial flux machine (internal or external rotor) or as an axial flux machine (I or H rotor).

[0063] In addition to the gear ratio(s), the gearbox may require a differential to compensate for speed differences between the vehicle wheels that occur when cornering.

[0064] The invention is explained in more detail below using exemplary embodiments in conjunction with the accompanying drawings. The drawings schematically show:

[0065] Fig. 1 is a schematic view of a drive for an electric motor vehicle according to a first embodiment;

[0066] Fig. 2 is a schematic view of a drive for an electric motor vehicle according to a second embodiment; Fig. 3 is a schematic view of a drive for an electric motor vehicle according to a third embodiment;

[0067] Fig. 4 is a schematic view of a drive for an electric motor vehicle according to a fourth embodiment;

[0068] Fig. 5 is a schematic view of a drive for an electric motor vehicle according to a fifth embodiment;

[0069] Fig. 6 is a schematic view of a drive for an electric motor vehicle according to a sixth embodiment;

[0070] Fig. 7 is a schematic view of a drive for an electric motor vehicle according to a seventh embodiment;

[0071] Fig. 8 is a schematic view of a drive for an electric motor vehicle according to an eighth embodiment;

[0072] Fig. 9 is a schematic view of a drive for an electric motor vehicle according to a ninth embodiment;

[0073] Fig. 10 is a schematic view of a drive for an electric motor vehicle according to a tenth embodiment;

[0074] Fig. 11 is a schematic view of a drive for an electric motor vehicle according to an eleventh embodiment;

[0075] Fig. 12 is a schematic view of a drive for an electric motor vehicle according to a twelfth embodiment; and Fig. 13 is a schematic view of a drive for an electric motor vehicle according to a thirteenth embodiment.

[0076] In the following description, the same reference symbols are used for the same items.

[0077] Figure 1 shows a schematic view of a drive 1 for an electric motor vehicle according to a first embodiment.

[0078] In more detail, Figure 1 shows a drive 1 for an electric motor vehicle with two drive arrangements 2, 4.

[0079] In this case, one drive arrangement 2, 4 is assigned to each vehicle wheel 8, 9 of the drive 1 and both drive arrangements 2, 4 together form an electric axle or an electric axle.

[0080] As can easily be seen from Figure 1, each drive assembly 2, 4 comprises an electric motor 10, 20, a transmission 30, 40 comprising a planetary gear, and a vehicle braking device 50, 60. Each vehicle braking device 50, 60 has a multi-disk brake 52, 62.

[0081] Each of the two multi-disk brakes 52, 62 is accommodated in a housing 6 of the drive arrangement 2, 4 in such a way that the escape of abrasion resulting from a braking operation from the housing 6 can be prevented and environmental influences on the multi-disk brake 52, 62 can be reduced.

[0082] Each multi-disk brake 52, 62 is integrated into the gear 30, 40, or the gear 30, 40 and the multi-disk brake 52, 62 are housed in a common housing 6 of the drive assembly 2, 4. More precisely, the gear 30, 40 and the multi-disk brake 52, 62 are housed in a common housing 6 of the drive assembly 2, 4.

[0083] Furthermore, Figure 1 shows that the rotational axes of the electric motors 10, 20, the transmissions 30, 40, and the vehicle braking devices 50, 60 are aligned or arranged coaxially. Furthermore, it should be noted that the multi-disk brakes 52, 62 are oil-cooled. Furthermore, the multi-disk brakes 52, 62 and the transmissions 30, 40 have a common oil circuit and can thus be cooled by a common oil circuit.

[0084] To avoid misunderstandings, each of the multi-disk brakes 52, 62 is clearly designed as a wheel brake.

[0085] In addition, the multi-disk brakes 52, 62 are arranged in the power transmission path downstream of the electric motor 10, 20 and downstream of the transmission 30, 40, so that each multi-disk brake 52, 62 can act on a wheel drive shaft 80, 90 of a drive 1. In other words, each multi-disk brake 52, 62 is arranged in the power transmission path starting from the electric motor 10, 20 downstream of the transmission 30, 40. The wheel drive shafts 80, 90 are each releasably coupled to vehicle wheels 8, 9 via wheel coupling sections 82, 92.

[0086] Furthermore, with regard to Figure 1, it can be noted that a coaxial design for a drive arrangement 2, 4 or also for a drive 1 is shown here, in which, starting from an imaginary vehicle center in the direction of a vehicle wheel 8, 9, i.e. towards the vehicle exterior or outwards, the electric machines 10, 20 are each followed by a transmission 30, 40 and then by a vehicle braking device 50, 60 or a multi-disk brake 52, 62.

[0087] Figure 2 shows a schematic view of a drive 1 for an electric motor vehicle according to a second embodiment.

[0088] For the sake of simplicity and brevity, only the differences from Figure 1 are explained below. All other statements in Figure 1 apply analogously to Figure 2.

[0089] Figure 2, like Figure 1, also shows a coaxial design for a drive arrangement 2, 4 or also for a drive 1. However, according to Figure 2, starting from an imaginary vehicle center in the direction of a vehicle wheel 8, 9, i.e., toward the exterior of the vehicle or outward, the transmission 30, 40 is followed by an electric machine 10, 20 and then by a vehicle braking device 50, 60 or a multi-disk brake 52, 62.

[0090] Figure 3 shows a schematic view of a drive 1 for an electric motor vehicle according to a third exemplary embodiment. For the sake of simplicity and brevity, only the differences from Figure 1 are explained below. All other explanations of Figure 1 apply analogously to Figure 3.

[0091] Thus, Figure 3, like Figure 1, shows a coaxial design for a drive arrangement 2, 4 or also for a drive 1. However, according to Figure 3, starting from an imaginary vehicle center in the direction of a vehicle wheel 8, 9, i.e., toward the exterior of the vehicle, the vehicle braking devices 50, 60 or the multi-disk brakes 52, 62 are each followed by a transmission 30, 40 and then an electric machine 10, 20.

[0092] Figure 4 shows a schematic view of a drive 1 for an electric motor vehicle according to a third embodiment.

[0093] For the sake of simplicity and brevity, only the differences from Figure 1 are explained below. All other statements in Figure 1 apply analogously to Figure 4.

[0094] Figure 4, like Figure 1, shows a coaxial design for a drive arrangement 2, 4 or also for a drive 1. However, according to Figure 4, starting from an imaginary vehicle center in the direction of a vehicle wheel 8, 9, i.e., toward the exterior of the vehicle or outward, the transmissions 30, 40 are each followed by a vehicle braking device 50, 60 or a multi-disk brake 52, 62, and then by an electric machine 10, 20.

[0095] As a further difference to Figure 1, the multi-disk brake 52, 62 is provided in the power transmission path between the electric machine 10, 20 and the transmission 30, 40 for each drive arrangement 2, 4, so that the multi-disk brake 52, 62 can act on a shaft 12, 22 of the electric machine 10, 20 and on an input shaft of the transmission 30, 40.

[0096] Figure 5 shows a schematic view of a drive 1 for an electric motor vehicle according to a fifth embodiment.

[0097] For the sake of simplicity and brevity, only the differences from Figure 1 are explained below. All other statements in Figure 1 apply analogously to Figure 5.

[0098] First, the difference from Figure 1 is that spur gears are used as transmissions 30, 40 instead of planetary gears. Furthermore, the rotational axes of the electric motors 10, 20 and the vehicle braking devices 50, 60 are aligned or arranged parallel or axially parallel. The same applies to parts of the transmissions 30, 40.

[0099] In addition, the electric machines 10, 20 are arranged outside or close to the vehicle exterior or to the vehicle wheel and the transmissions 30, 40 are arranged inside or close to an imaginary vehicle center.

[0100] Figure 6 shows a schematic view of a drive 1 for an electric motor vehicle according to a sixth embodiment.

[0101] For the sake of simplicity and brevity, only the differences to Figure 5 are explained below. All other statements in Figure 5 apply analogously to Figure 6.

[0102] Figure 6 differs from Figure 5 only in that the electric machines 10, 20 are arranged inside or close to an imaginary vehicle center and the transmissions 30, 40 are arranged outside or close to the vehicle exterior or to the vehicle wheel 8, 9.

[0103] Figure 7 shows a schematic view of a drive 1 for an electric motor vehicle according to a seventh embodiment.

[0104] For the sake of simplicity and brevity, only the differences to Figure 5 are explained below. All further explanations of Figure 5 apply analogously to Figure 7.

[0105] Figure 7 differs from Figure 5 only in that belt transmissions 30 and 40 are used instead of spur gears.

[0106] Figure 8 shows a schematic view of a drive 1 for an electric motor vehicle according to an eighth embodiment.

[0107] For the sake of simplicity and brevity, only the differences to Figure 5 are explained below. All further explanations of Figure 5 apply analogously to Figure 8.

[0108] The drive 1 is configured similarly to Figure 5, with the rotational axes of the electric motors 10, 20 and the vehicle braking devices 50, 60 aligned or arranged parallel or axially parallel. The same applies to parts of the transmissions 30, 40. However, Figure 8 differs from Figure 5 in that the electric motors 10, 20 and their rotational axes are not coaxial, but rather are aligned or arranged parallel or axially parallel to one another.

[0109] Figure 9 shows a schematic view of a drive 1 for an electric motor vehicle according to a ninth embodiment.

[0110] For the sake of simplicity and brevity, only the differences to Figure 5 are explained below. All other statements in Figure 5 apply analogously to Figure 9.

[0111] In contrast to Figures 5 and 6, the rotational axes of the electric machines 10, 20, the transmissions 30, 40, and the vehicle braking devices 50, 60 are aligned or arranged such that their rotational axes intersect. More specifically, the rotational axes of the electric machines 10, 20 and the transmissions 30, 40 are arranged at an angle of 90 degrees to the rotational axes of the vehicle braking devices 50, 60.

[0112] Figure 10 shows a schematic view of a drive 3 for an electric motor vehicle according to a tenth embodiment.

[0113] The drive 3 comprises a drive arrangement 2 which is assigned to the vehicle wheels 8, 9 of the drive 3 and which forms an E-axle or an electric axle.

[0114] Here, the drive assembly 2 has a single electric machine 10, with the drive 3 comprising an axle differential 70 that is connected to the single electric machine 10 in a power-transmitting manner. The axle differential 70 has a spur gear differential.

[0115] Furthermore, the drive 3 has two wheel drive shafts 80, 90 for transmitting power to vehicle wheels, wherein the axle differential 70 is coupled to the two wheel drive shafts 80, 90.

[0116] In addition, Figure 10 shows that the drive arrangement 2 for a motor vehicle has a transmission 30 comprising a planetary gear and two vehicle braking devices 50, 60, each vehicle braking device 50, 60 having a multi-disk brake 52, 62.

[0117] Each multi-disk brake 52, 62 is accommodated in a housing 6 of the drive arrangement 2 in such a way that the escape of abrasion resulting from a braking operation from the housing 6 can be prevented and environmental influences on each multi-disk brake 52, 62 can be reduced.

[0118] Figure 10 also shows that the multi-disk brakes 52, 62 are integrated into the transmission 30 or that the transmission 30 and the multi-disk brakes 52, 62 are accommodated in a common housing 6 of the drive arrangement 2.

[0119] The axes of rotation of the electric machine 10, the transmission 30 and the vehicle braking devices 50, 60 are aligned or arranged coaxially.

[0120] The multi-disk brakes 52, 62 are oil-cooled, or the multi-disk brakes 52, 62 and the transmission 30 have a common oil circuit and can thus be cooled by a common oil circuit. Each multi-disk brake 52, 62 is designed as a wheel brake.

[0121] In addition, the multi-disk brakes 52, 62 are arranged in the power transmission path downstream of the electric machine 10 and downstream of the transmission 30, so that the multi-disk brakes 52, 62 can each act on a wheel drive shaft 80, 90 of a drive 3. In other words, the multi-disk brakes 52, 62 are arranged in the power transmission path starting from the electric machine 10 downstream of the transmission 30, so that the multi-disk brakes 52, 62 can each act on a wheel drive shaft 80, 90 of the drive 3.

[0122] Thus, a multi-disk brake 52, 62 is assigned to each wheel drive shaft 80, 90, respectively, with the transmission 30, which comprises a planetary gear, being arranged between the single electric motor 10 and the axle differential 70. The wheel drive shafts 80, 90 are each releasably coupled to vehicle wheels 8, 9 via wheel coupling sections 82, 92.

[0123] Figure 11 shows a schematic view of a drive 3 for an electric motor vehicle according to an eleventh embodiment.

[0124] For the sake of simplicity and brevity, only the differences from Figure 10 are explained below. All other statements in Figure 10 apply analogously to Figure 11.

[0125] In contrast to Figure 10, the transmission 30 is designed as a spur gear, and the rotational axes of the electric motor 10 and the vehicle braking devices 50, 60 are arranged parallel or axially parallel. Furthermore, the axle differential 70 has a bevel gear differential.

[0126] Figure 12 shows a schematic view of a drive 3 for an electric motor vehicle according to a twelfth embodiment.

[0127] For the sake of simplicity and brevity, only the differences from Figure 11 are explained below. All other statements in Figure 11 apply analogously to Figure 12.

[0128] Figure 12 differs from Figure 11 in that the transmission 30 has a belt transmission.

[0129] Figure 13 shows a schematic view of a drive 3 for an electric motor vehicle according to a thirteenth embodiment.

[0130] For the sake of simplicity and brevity, only the differences from Figure 11 are explained below. All other statements in Figure 11 apply analogously to Figure 13.

[0131] Figure 13 differs from Figure 11 in that the gear 30 comprises a planetary gear and a bevel gear.

[0132] As a further difference between Figures 11 and 13, in Figure 13 the axes of rotation of the electric machine 10, the transmission 30, 40 and the vehicle braking devices 50, 60 are aligned or arranged such that their axes of rotation intersect.

[0133] Strictly speaking, the axes of rotation of the electric machine 10 and the transmission 30 are arranged at a 90 degree angle to the axes of rotation of the vehicle braking devices 50, 60.

[0134] List of reference symbols

[0135] drive

[0136] Drive arrangement

[0137] drive

[0138] Drive arrangement

[0139] Electrical machine housing

[0140] shaft electric machine

[0141] Wave

[0142] Gearbox

[0143] Gearbox

[0144] Vehicle braking device

[0145] multi-disc brake

[0146] Vehicle braking device

[0147] multi-disc brake

[0148] axle differential

[0149] Wheel drive shaft

[0150] Wheel coupling section

[0151] Wheel drive shaft

[0152] Wheel coupling section

Claims

Patent claims 1 . Drive arrangement (2, 4) for a motor vehicle comprising: - an electrical machine (10, 20), - a gearbox (30, 40), and - at least one vehicle braking device (50, 60), characterized in that the at least one vehicle braking device (50, 60) has a multi-disk brake (52, 62).

2. Drive arrangement according to claim 1, - wherein the multi-disk brake (52, 62) is accommodated in a housing (6) of the drive arrangement (2, 4) in such a way that the escape of abrasion resulting from a braking operation from the housing (6) can be prevented and / or environmental influences on the multi-disk brake (52, 62) can be reduced.

3. Drive arrangement according to claim 1 or 2, - wherein the multi-disk brake (52, 62) is integrated into the transmission (30, 40) and / or the transmission (30, 40) and the multi-disk brake (52, 62) are accommodated in a common housing (6) of the drive arrangement (2, 4).

4. Drive arrangement according to one of the preceding claims, - wherein the axes of rotation of the electric machine (10, 20) and of the at least one vehicle braking device (50, 60) are aligned and / or arranged coaxially, and / or - wherein the axes of rotation of the electric machine (10, 20) and of the at least one vehicle braking device (50, 60) are aligned and / or arranged parallel or axially parallel, and / or - wherein the axes of rotation of the electric machine (10, 20) and of the at least one vehicle braking device (50, 60) are aligned and / or arranged at an angle to one another.

5. Drive arrangement according to one of the preceding claims, - wherein the multi-disk brake (52, 62) is oil-cooled, and / or - wherein the multi-disk brake (52, 62) and the transmission (30, 40) have a common oil circuit and can thus be cooled by a common oil circuit.

6. Drive arrangement according to one of the preceding claims, - wherein the multi-disk brake (52, 62) is designed as a wheel brake.

7. Drive arrangement according to one of the preceding claims, - wherein the multi-disk brake (52, 62) is arranged / provided in the power transmission path downstream of the electric machine (10, 20) and / or downstream of the transmission (30, 40), so that the multi-disk brake (52, 62) can act on a wheel drive shaft (80, 90) of a drive (1, 3), and / or - wherein the multi-disk brake (52, 62) is arranged / provided in the power transmission path starting from the electric machine (10, 20) downstream of the transmission (30, 40), so that the multi-disk brake (52, 62) can act on a wheel drive shaft (80, 90) of a drive (1, 3).

8. Drive arrangement according to one of the preceding claims 1 to 6, - wherein the multi-disk brake (52, 62) is provided in the power transmission path between the electric machine (10, 20) and the transmission (30, 40), so that the multi-disk brake (52, 62) can act on a shaft (12, 22) of the electric machine (10, 20) and / or on an input shaft of the transmission (30, 40).

9. Drive (1, 3) for an electric motor vehicle comprising: - at least one drive arrangement (2, 4) according to one of the preceding claims, - wherein the at least one drive arrangement is assigned to a vehicle wheel (8, 9) of the drive (1, 3) and the at least one drive arrangement (1) forms an electric axle.

10. Drive (3) according to claim 9, - wherein the at least one drive arrangement (2, 4) comprises a single electric machine (10), - wherein the drive (3) comprises an axle differential (70) which is connected to the single electric machine (10) in a power-transmitting manner, - wherein the axle differential (70) comprises a spur gear differential or a bevel gear differential, - wherein the drive (3) comprises two wheel drive shafts (80, 90) for transmitting power to vehicle wheels, - wherein the axle differential (70) is coupled to the two wheel drive shafts (80, 90), - wherein a disc brake (52, 62) is assigned to each wheel drive shaft (80, 90), and - wherein the transmission (30) is arranged between the single electric machine (10) and the axle differential (70), and / or - wherein the transmission (30) comprises a planetary gear, a spur gear, a bevel gear and / or a belt transmission, - or wherein the transmission (30) is designed as a planetary transmission, as a spur gear transmission, as a bevel gear transmission and / or as a belt transmission.

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