Drive device for a vehicle

Abstract

A drive device for a vehicle has a drive machine (10) for a main drive, a drive machine (20) for an auxiliary drive, a first output element (18) for the main drive and a first output element (28) for the auxiliary drive. The drive machine (10) for the main drive is mechanically operatively connected to a transmission unit (14) via a main drive shaft (1). The transmission unit (14) is mechanically operatively connected to the first output element (18) for the main drive. The main drive shaft (1), the transmission unit (14) and the drive machine (10) for the main drive are arranged coaxially to a drive axis (2). The drive machine (20) for the auxiliary drive can be mechanically operatively connected to the first output element (28) for the auxiliary drive via a switching element (42) for the auxiliary drive. The switching element (42) for the auxiliary drive is arranged between the drive machine (10) for the main drive and the transmission unit (14) in a transverse direction (Y) in which the drive axis (2) is arranged. The transmission unit (14) and the drive machine (10) for the main drive are arranged on opposite sides of the main drive shaft (1) in the transverse direction (Y). The drive machine (20) for the auxiliary drive and the first output element (28) for the auxiliary drive are arranged in a longitudinal direction (X) transverse to the drive axis (2).

Description

[0001] Drive device for a vehicle

[0002] Technical area

[0003] The present invention relates to a drive device for a vehicle and a vehicle.

[0004] State of the art

[0005] Drive systems for vehicles with a combustion engine-powered main drive and a power take-off are known. Using a drive system with an electrically powered main drive and power take-off requires a large amount of space for components such as an energy storage unit that supplies power to the main drive and power take-off.

[0006] Description of the invention

[0007] The present invention is based on the object of providing an improved drive device which is designed to be compact.

[0008] The object is achieved with a drive device having the features of claim 1. Advantageous further developments are the subject of the dependent claims.

[0009] A first aspect relates to a drive device for a vehicle. The vehicle can be a commercial vehicle or a mobile work machine, such as a land vehicle, a tractor, a construction vehicle, or a municipal vehicle. The drive device has a prime mover for a main drive, a prime mover for a secondary drive, a first output element for the main drive, and a first output element for the secondary drive. The first output element for the main drive can be a drive wheel. The drive wheel can have a wheel hub. The drive device can have two first output elements arranged in a transverse direction on opposite sides of the vehicle on a drive axle. The drive unit can thus be configured to drive the vehicle via the prime mover for the main drive.The first output element for the auxiliary drive can be formed by a power take-off shaft, for example, for connecting a mower or the like to a tractor. At least one of the drive motor for the main drive and the drive motor for the auxiliary drive can be formed by an electric motor. The drive motors and the first output elements for the main drive and the auxiliary drive can be arranged in a common axle housing, for example, an axle housing for a rear axle.

[0010] The drive motor for the main drive is mechanically operatively connected to a transmission unit via a main drive shaft. The transmission unit is mechanically operatively connected to the first output element for the main drive. The main drive shaft, the transmission unit and the drive motor for the main drive are arranged coaxially to a drive axle. The drive axle can be formed by a rotational axis of the main drive shaft. The drive motor for the auxiliary drive is mechanically operatively connected to the first output element for the auxiliary drive via a switching element for the auxiliary drive. The switching element for the auxiliary drive is arranged between the drive motor for the main drive and the transmission unit in a transverse direction in which the drive axle is arranged. The transmission unit and the drive motor for the main drive are arranged on opposite sides of the main drive shaft in the transverse direction.The drive motor for the auxiliary drive and the first output element for the auxiliary drive are arranged in a longitudinal direction transverse to the drive axle. The longitudinal direction may be at an angle to the drive axle. The longitudinal direction may be oriented substantially perpendicular to the drive axle. The longitudinal direction may have a front side, for example, front, and a rear side, for example, rear. The longitudinal direction may be formed by a direction of travel of the vehicle for straight-ahead travel. A direction of gravity may refer to the drive unit installed in the vehicle to propel the vehicle.

[0011] If two elements are mechanically operatively connected, they are directly or indirectly coupled to one another in such a way that a movement of one element causes a reaction in the other element. For example, a mechanical operative connection can be provided by a positive or frictional connection. The mechanical operative connection can correspond to the meshing of corresponding toothings of the two elements. Additional elements, such as one or more spur gear stages, can be provided between the elements. A permanently rotationally fixed connection between two elements, on the other hand, is understood to be a connection in which the two elements are rigidly coupled to one another in all intended states of the transmission. The elements can be present as individual components that are connected to one another in a rotationally fixed manner or as a single piece.A switching element, such as a clutch or brake, can be used to selectively establish or break a rotationally fixed connection between two elements.

[0012] The first output element for the main drive can be formed coaxially with the drive axle. The drive device for the main drive can have two first output elements for the main drive. The two first output elements for the main drive can be arranged on opposite sides of the main drive axle in the transverse direction. One of the first output elements for the main drive can be mechanically operatively connected to the transmission unit via a first output shaft or a second output shaft, for example, connected in a rotationally fixed manner to an output element of the transmission unit. The first output shaft and the second output shaft can be arranged coaxially with the drive axle. At least one of the first output shaft and the second output shaft can extend at least partially through the main output shaft.One of the first output shaft and the second output shaft may extend through the prime mover.

[0013] The main drive shaft can be designed as a hollow shaft. The main drive shaft can be connected in a rotationally fixed manner to a rotor shaft of the prime mover for the main drive. The main drive shaft can be formed by the rotor shaft of the prime mover for the main drive. The transmission unit can have a differential gear. The differential gear can have a bevel gear set. The differential gear can have a planetary gear set. The differential gear can have a differential lock switching element. The first output shaft and the second output shaft can be connected in a rotationally fixed manner to one another via the differential lock element.

[0014] The first output element for the auxiliary drive can be arranged axially parallel to the drive motor for the auxiliary drive or to an output shaft of the drive motor for the auxiliary drive. The switching element for the auxiliary drive can be formed by a clutch or PTO clutch, for example, a multi-plate clutch.

[0015] The power take-off drive motor and the first power take-off output element can be arranged on opposite sides of the drive axle in the longitudinal direction. The power take-off drive motor can be arranged in front of the drive axle in the longitudinal direction. The first power take-off output element can be arranged behind the drive axle in the longitudinal direction. The output shaft of the power take-off drive motor can be arranged above or below the drive axle in the direction of gravity. The power take-off drive motor can be arranged on the transmission unit side in the transverse direction relative to the power take-off switching element.

[0016] In one embodiment of the drive device, the switching element for the auxiliary drive can be arranged in front of the drive axle in the longitudinal direction of the vehicle. An input element, for example a rotary shaft, and an output element, for example a rotary shaft, of the switching element for the auxiliary drive can be arranged below the drive axle in the direction of gravity. The input element and the output element of the switching element for the auxiliary drive can be arranged coaxially with each other.

[0017] In one embodiment of the drive device, the switching element for the auxiliary drive can be arranged behind the drive axle in the longitudinal direction of the vehicle and offset upwards relative to the drive axle in the direction of gravity. The input element and the output element of the switching element for the auxiliary drive can be arranged above the drive axle.

[0018] In one embodiment of the drive device, the transmission unit can be mechanically operatively connected to the first output element for the main drive via a final transmission for the main drive. The final transmission for the main drive can be arranged in the transverse direction between the transmission unit and the first output element for the main drive. The final transmission for the main drive can be arranged in the transverse direction between the prime mover for the main drive and the output element for the main drive. The final transmission for the main drive can be arranged adjacent to the first output element for the main drive in the transverse direction. The final transmission for the main drive can be arranged in the wheel hub of the first output element for the main drive. The final transmission for the main drive can have a planetary gear set.

[0019] In one embodiment of the drive device, the drive motor for the main drive can be mechanically connected to a second output element for the main drive. The drive motor for the main drive can be mechanically connected to a second output element for the main drive via at least one transmission gear.

[0020] The second output element for the main drive can be arranged longitudinally in front of the drive axle. The second output element for the main drive can be formed by another drive axle. The second output element for the main drive can be formed by a front axle. The second output element for the main drive can have two drive wheels on opposite sides of the other drive axle. The second output element for the main drive can provide a switchable or permanent all-wheel drive or multi-axle drive for the vehicle.

[0021] In one embodiment of the drive device, the drive motor for the main drive can be mechanically operatively connected via a shifting element for the main drive to a second output element for the main drive, which is arranged in the longitudinal direction in front of the drive axle. The drive motor for the main drive can be mechanically operatively connected to the shifting element for the main drive via at least one transmission gear. The mechanical operative connection between the drive motor for the main drive and the shifting element for the main drive can comprise multiple transmission gears.

[0022] At least one of the main drive shifting element and the main drive transmission can be arranged transversely between the main drive engine and the transmission unit. An input element, for example a rotary shaft, and an output element, for example a rotary shaft, of the main drive shifting element can be arranged offset downwards in the direction of gravity relative to the drive axle. The input element and the output element of the main drive shifting element can be arranged coaxially with each other. The second main drive output element can provide a switchable all-wheel drive or multi-axle drive for the vehicle.

[0023] In one embodiment of the drive device, the drive motor for the main drive can be mechanically operatively connected to the second output element for the main drive via at least two transmission gears for the main drive. One of the transmission gears for the main drive can be formed by a bevel gear. A change in the direction of rotational axes, for example, essentially perpendicular to the drive axis, can occur via the bevel gear. The drive device can have more than two transmission gears for the main drive.

[0024] The transmission gears for the main drive can be arranged offset downwards in the direction of gravity from the drive axle. The transmission gears for the main drive can be arranged transversely between the prime mover for the main drive and the transmission unit. The transmission gears for the main drive can be arranged longitudinally between the switching element for the auxiliary drive and the drive axle. The transmission gears for the main drive can be arranged longitudinally between the drive axle and the prime mover for the auxiliary drive. The transmission gears for the main drive can be arranged between the drive axle and the first output element for the auxiliary drive. All transmission gears can be arranged longitudinally on one side of the drive axle, for example in front of or behind the drive axle.

[0025] At least one transmission gear for the main drive can be formed by a bevel gear. An input bevel gear of the bevel gear can be connected in a rotationally fixed manner to the main drive shaft. The input bevel gear can be formed by the main drive shaft.

[0026] At least one transmission gear for the main drive can be formed by a planetary gear or a spur gear. A spur gear can have two or more spur gear stages. An input gear of a spur gear can be connected in a rotationally fixed manner to the main drive shaft. The input gear can be formed by the main drive shaft.

[0027] A transmission gear of the main drive can comprise a double-spur gear, which can be hollow. The double-spur gear can form an output gear of a transmission gear for the main drive and an input gear for another transmission gear for the main drive.

[0028] In one embodiment of the drive device, the drive motor for the auxiliary drive can be mechanically operatively connected to the first output element for the auxiliary drive via at least two transmission gears for the auxiliary drive. An output gear of one of the transmission gears can be rotationally fixedly connected to a transmission shaft. The transmission shaft can be rotationally fixedly connected to an input element of a final transmission gear for the auxiliary drive. The transmission shaft can form at least one of the output gear and the input element. The transmission shaft of the auxiliary drive can extend through the double spur gear for the main drive, for example in a longitudinal direction. The mechanical operative connection of the drive motor for the auxiliary drive to the first output element for the auxiliary drive can comprise a transmission gear for the auxiliary drive.The mechanical operative connection between the drive motor for the auxiliary drive and the first output element for the auxiliary drive can comprise at least or exactly two transmission gears for the auxiliary drive. A transmission gear, for example a final transmission gear, for the auxiliary drive can be formed by a planetary gear set. At least one transmission gear for the auxiliary drive can be formed by a spur gear. A spur gear can comprise two or more spur gear stages.

[0029] The final drive transmission for the auxiliary drive can be arranged longitudinally behind the drive axle. The final drive transmission for the auxiliary drive can be arranged longitudinally behind the main drive transmissions. The final drive transmission for the auxiliary drive can be arranged longitudinally directly in front of the first output element for the auxiliary drive. The final drive transmission for the auxiliary drive can form the first output element for the auxiliary drive.

[0030] The mechanical operative connection between the drive motor for the auxiliary drive and the shifting element for the auxiliary drive can have exactly one transfer gear for the auxiliary drive. The mechanical operative connection between the drive motor for the auxiliary drive and the second output element can have exactly two transfer gears for the auxiliary drive. The mechanical operative connection between the drive motor for the auxiliary drive and the shifting element for the auxiliary drive and the mechanical operative connection between the drive motor for the auxiliary drive and the second output element can form a common transfer gear. The mechanical operative connection between the shifting element for the auxiliary drive and the first output element for the auxiliary drive can have exactly one transfer gear and, for example, additionally a final transfer gear.The mechanical operative connection between the switching element for the auxiliary drive and the final transmission for the auxiliary drive can comprise exactly one transmission. In one embodiment of the drive device, the drive motor for the auxiliary drive can be mechanically operatively connected to a second output element for the auxiliary drive, which can be arranged on the same side of the drive axle in the longitudinal direction as the drive motor for the auxiliary drive. The second output element for the auxiliary drive can be arranged in front of the drive axle in the longitudinal direction. The second switching element for the auxiliary drive can be permanently mechanically operatively connected to the drive motor for the auxiliary drive. The second output element for the auxiliary drive can be formed by a hydraulic pump.The second output element for the auxiliary drive can be arranged transversely relative to the switching element for the auxiliary drive on the side of the main drive engine. The second output element for the auxiliary drive can be arranged on the same side as the auxiliary drive engine with respect to the drive axle.

[0031] The second output element for the auxiliary drive can have an input element, for example a rotary shaft. The input element of the second output element for the auxiliary drive can be arranged axially parallel to the output shaft of the drive motor for the auxiliary drive. The input element of the second output element for the auxiliary drive can be arranged below at least one of the output shaft of the drive motor for the auxiliary drive or the input element of the switching element for the auxiliary drive in the direction of gravity. The input element of the second output element for the auxiliary drive can be arranged above or below the drive axle in the direction of gravity.

[0032] The input element of the switching element for the power take-off can be arranged, in the direction of gravity, between the output shaft of the power take-off engine and the input element of the second power take-off output element. The input element of the switching element for the power take-off can be arranged, in the direction of gravity, below the output shaft of the power take-off engine and the input element of the second power take-off output element. An output gear of one power take-off transmission can form an input gear of another power take-off transmission. An output gear of one power take-off transmission can be rotationally connected to an input gear of another power take-off transmission.An output gear of one power take-off transmission and an input gear of another power take-off transmission may form a double gear.

[0033] A second aspect relates to a vehicle, for example a commercial vehicle or a mobile work machine, such as a land vehicle, a tractor, a construction vehicle, or a municipal vehicle. The vehicle has a drive device according to one of the preceding embodiments with two first output elements for the main drive. The two first output elements for the main drive are arranged on opposite sides of the vehicle in the transverse direction. The drive device is configured to drive the vehicle via the two first output elements for the main drive. The first output elements for the main drive can each be designed as a drive wheel or a track. The vehicle can, for example, stand on a surface with the output elements. The prime mover for the main drive of the drive device can be configured to drive the first output elements for the main drive.

[0034] Short description of the characters

[0035] Figure 1 shows a plan view of a diagram of an embodiment of a drive device.

[0036] Figure 2 shows a side view of a diagram of the embodiment of the drive device.

[0037] Figure 3 shows a top view of a diagram of another embodiment of a drive device. Figure 4 shows a side view of a diagram of the embodiment of the drive device.

[0038] Detailed description of embodiments

[0039] Figure 1 shows a top view of a diagram of an embodiment of a drive device. The drive device can be used for a vehicle, in this case a moving work machine. The drive device has a drive machine 10 for a main drive, in this case an electric motor, and a drive machine 20 for a secondary drive, in this case a further electric motor. The drive machines 10, 20 each have an output shaft, in this case a rotor shaft. Two first output elements 18 for the main drive, in this case drive wheels, can be driven via the drive machine 10 for the main drive. A first output element 28 for the secondary drive, in this case a power take-off shaft, for example for driving a mower of the moving work machine, can be driven via the drive machine 20 for the secondary drive.

[0040] The main drive motor 10 is mechanically connected to a transmission unit 14 via a main drive shaft 1. The main drive shaft 1 is oriented in a transverse direction Y. The transverse direction Y is arranged transversely to a longitudinal direction X. The longitudinal direction X points in the direction of travel of the vehicle when the vehicle is traveling straight ahead.

[0041] The transmission unit 14 has a number of planetary gear sets and a differential gear. The differential gear is designed to drive a first output shaft 8 and a second output shaft 9. The first output shaft 8 is rotationally connected to the second output shaft 9 via a differential lock. Both the first output shaft 8 and the second output shaft 9 are each mechanically operatively connected to one of the first output elements 18 for the main drive via a final transmission gear 15 for the main drive. The respective final transmission gear 15 is arranged in a wheel hub in this case. The first output shaft 8 extends from the differential lock in Figure 1 to the left to the left final transmission gear 15. The second output shaft 9 extends from the differential to the left to the differential lock and to the right through the drive motor 10 for the main drive to the right final transmission gear 15.

[0042] The main drive shaft 1, the transmission unit 14, and the main drive motor 10 are arranged coaxially with a drive axle 2, which in this case is provided by a driven rear axle. The transmission unit 14 and the main drive motor 10 are arranged on opposite sides of the main drive shaft 1 in the transverse direction Y. The two final transmission gears 15 for the main drive and the two first output elements 18 for the main drive are arranged in this order from the inside to the outside on opposite sides of the main drive shaft 1.

[0043] The drive motor 20 for the auxiliary drive and the first output element 28 for the auxiliary drive are arranged in a longitudinal direction X on opposite sides of the drive axle 2. The drive motor 20 for the auxiliary drive can be mechanically connected to the first output element 28 for the auxiliary drive via a switching element 42, in this case a clutch, for the auxiliary drive. The switching element 42 for the auxiliary drive is arranged in the transverse direction Y between the drive motor 10 for the main drive and the transmission unit 14. An installation space in the transverse direction Y between the drive motor 10 for the main drive and the transmission unit 14 is used to configure a power transmission path from the drive motor 20 for the auxiliary drive to the first output element 28 for the auxiliary drive. This results in a compact drive system.

[0044] Further details of the drive system are described below.

[0045] The drive system has a switchable front axle drive. For this purpose, the drive system has a first transmission gear 11 for the main drive. The first transmission gear 11 for the main drive is formed by a bevel gear set. An input bevel gear of the bevel gear set is connected in a rotationally fixed manner to the main drive shaft 1 and is arranged in the transverse direction Y between the gear unit 14 and the drive motor 10 for the main drive. An output bevel gear of the bevel gear set is connected in a rotationally fixed manner and coaxially to an input spur gear of a second transmission gear 12 for the main drive. The input bevel gear has an axis of rotation in the transverse direction Y. The output bevel gear has an axis of rotation in the longitudinal direction X. The second transmission gear 12 is designed as a three-stage spur gear and is described in more detail in Figure 2.The second transmission gear 12 is mechanically connected to the second output element 19 for the main drive, in this case a drivable front axle.

[0046] The drive motor 20 for the auxiliary drive is arranged in the longitudinal direction X in front of the drive axle 2. The drive motor 20 for the auxiliary drive is arranged in the transverse direction Y on the side of the drive axle 2 on which the transmission unit 14 is arranged. The output shaft of the drive motor 20 for the auxiliary drive is rotationally fixed and coaxial with an input spur gear of a first transmission gear.

[0047] 21 for the auxiliary drive. The first transmission gear 21 for the auxiliary drive is designed as a two-stage spur gear. The first transmission gear 21 for the auxiliary drive is arranged in the longitudinal direction X between the switching element 42 for the auxiliary drive and the drive motor 20 for the auxiliary drive. An output spur gear of the first transmission gear 21 for the auxiliary drive is rotationally connected to an input element of the switching element 42 for the auxiliary drive.

[0048] The output spur gear of the first transmission gear 21 for the auxiliary drive is rotationally fixed and coaxial with an input gear of a second transmission gear

[0049] 22 for the auxiliary drive. The second transmission gear 22 for the auxiliary drive is designed as a three-stage spur gear and is arranged in the longitudinal direction X between the drive motor 20 for the auxiliary drive and the shift element 42 for the auxiliary drive. An output gear of the second transmission gear 22 for the auxiliary drive is connected in a rotationally fixed and coaxial manner to an input element of a second output element 29 for the auxiliary drive, in this case a hydraulic pump. The second output element 29 for the auxiliary drive is arranged in the transverse direction Y on one side of the drive axle 2 on which the drive motor 10 for the main drive is arranged. The output spur gear of the first transmission gear 21 for the auxiliary drive is further connected in a rotationally fixed and coaxial manner to an input element of the shift element 42 for the auxiliary drive.The switching element 42 for the auxiliary drive is arranged in the transverse direction Y between the output shaft of the drive motor 20 for the auxiliary drive and the input element of the second output element 29 for the auxiliary drive. The switching element 42 for the auxiliary drive is arranged in the longitudinal direction X in front of the drive axle 2.

[0050] An output element of the switching element 42 for the auxiliary drive is coaxially and rotationally fixedly connected to an input gear of a third transmission gear 23 for the auxiliary drive. The third transmission gear 23 for the auxiliary drive is designed as a two-stage spur gear and is arranged in the longitudinal direction X between the switching element 42 for the auxiliary drive and the drive axle 2. The third transmission gear 23 for the auxiliary drive is described in more detail with reference to Figure 2. The third transmission gear 23 for the auxiliary drive is mechanically connected to the first output element 28 for the auxiliary drive.

[0051] Figure 2 shows a side view of a diagram of another embodiment of the drive device. The present embodiment has all the features of the previous embodiment. An output gear of the second transmission gear 12 for the main drive is arranged below the input gear of the second transmission gear 12 for the main drive in the direction of gravity Z. The output gear of the second transmission gear 12 for the main drive is coaxially and rotationally fixedly connected to an input gear of a third transmission gear 13 for the main drive. The output gear of the second transmission gear 12 for the main drive and the input gear of the third transmission gear 13 form a double-spur gear. The double-spur gear is hollow in the longitudinal direction X.

[0052] The third transmission gear 13 for the main drive is arranged in the longitudinal direction X between the second transmission gear 12 for the main drive and the drive axle 2. The third transmission gear 13 for the main drive is designed as a two-stage spur gear. An output gear of the third transmission gear 13 for the main drive is arranged in the direction of gravity Z below the input gear of the third transmission gear 13. The output gear of the third transmission gear 13 for the main drive is coaxially and rotationally fixedly connected to an input element, in this case a rotary shaft, of a shift element 41, in this case a clutch, for the main drive.

[0053] The switching element 41 for the main drive is arranged in the longitudinal direction X in front of the drive axle 2. An output element, in this case a rotary shaft, of the switching element 41 for the main drive is mechanically connected to the drivable front axle. The drivable front axle is arranged in the longitudinal direction X in front of the switching element 41 for the main drive.

[0054] The input element and the output element of the switching element 42 for the auxiliary drive are arranged below the drive axle 2 in the direction of gravity Z. The output shaft of the drive motor 20 for the auxiliary drive and the input element of the second output element 29 for the auxiliary drive are arranged above the drive axle 2 in the direction of shear force Z. The input element of the switching element 42 for the auxiliary drive, the output shaft of the drive motor 20 for the auxiliary drive, and the input element of the second output element 29 for the auxiliary drive are arranged in a V-shape. The input element of the switching element 42 for the auxiliary drive forms the lowest point in the direction of gravity Z.

[0055] The output element of the switching element 42 for the auxiliary drive is coaxially and rotationally fixedly connected to an input gear of a third transmission gear 23 for the auxiliary drive. The third transmission gear 23 for the auxiliary drive is designed as a two-stage spur gear. An output gear of the third transmission gear 23 for the auxiliary drive is arranged below the input gear of the third transmission gear 23 for the auxiliary drive in the direction of gravity Z. The output gear of the third transmission gear 23 for the auxiliary drive is coaxially and rotationally fixedly connected to a transmission shaft. The transmission shaft extends from the output gear of the third transmission gear 23 for the auxiliary drive in the longitudinal direction X to the rear through the double spur gear.

[0056] The transmission shaft is coaxially and rotationally fixedly connected to an input element, in this case a rotary shaft, of a final transmission gear 25 for the auxiliary drive. The final transmission gear 25 for the auxiliary drive has a planetary gear set. The final transmission gear 25 for the auxiliary drive is arranged in the longitudinal direction X behind the second transmission gear 12 for the main drive. An output element, in this case a rotary shaft, of the final transmission gear 25 for the auxiliary drive forms the first output element 28 for the auxiliary drive at an end section at the rear in the longitudinal direction X.

[0057] Figure 3 shows a top view of a diagram of another embodiment of a drive device. The present embodiment has all the features of one of the preceding embodiments, unless otherwise described.

[0058] The first transmission gear 11 for the main drive is formed by a spur gear. An input gear of the first transmission gear 11 for the main drive is non-rotatably connected to the main drive shaft 1 and is arranged in the transverse direction Y between the gear unit 14 and the drive motor 10 for the main drive. An output gear of the first transmission gear 11 for the main drive is mechanically operatively connected to the second output element 19 for the main drive, which will be described in more detail with reference to Figure 4.

[0059] An output gear of the first transmission 21 for the auxiliary drive is connected in a rotationally fixed manner to an input element of the switching element 42 for the auxiliary drive. The switching element 42 for the auxiliary drive is arranged behind the drive axle 2 in the longitudinal direction X. The output gear of the first transmission 21 for the auxiliary drive forms an input gear for the second transmission 22 for the auxiliary drive. The second transmission 22 is designed as a two-stage spur gear and is arranged in the same plane in the longitudinal direction X as the first transmission 21 for the auxiliary drive. The third transmission 23 for the auxiliary drive is arranged in the longitudinal direction X between the switching element 42 for the auxiliary drive and the first output element 28 for the auxiliary drive.The third transmission gear 23 for the auxiliary drive is mechanically connected to the first output element 28 for the auxiliary drive, which is described in more detail with reference to Figure 4.

[0060] Figure 4 shows a side view of a diagram of the embodiment of the drive device. The present embodiment has all the features of the previous embodiment, unless otherwise described. The switching element 42 for the auxiliary drive is arranged in front of the drive axle 2 in the longitudinal direction X.

[0061] The output gear of the first transmission gear 11 for the main drive is connected in a rotationally fixed and coaxial manner to an input bevel gear of the second transmission gear 12 for the main drive. The second transmission gear 12 for the main drive is designed as a bevel gear.

[0062] An output bevel gear of the second transmission gear 12 for the main drive is arranged in the direction of gravity Z at the height of the input bevel gear of the second transmission gear 12 for the main drive. An output bevel gear of the second transmission gear 12 for the main drive is aligned with its axis of rotation in the longitudinal direction X and thus perpendicular to the axis of rotation of the input bevel gear of the second transmission gear 12 for the main drive. The output bevel gear of the second transmission gear 12 for the main drive is coaxial and rotationally connected to the input gear of the third transmission gear 13 for the main drive. The output bevel gear of the second transmission gear 12 for the main drive and the input gear of the third transmission gear 13 form a double-spur gear. The third transmission gear 13 for the main drive is arranged behind the second transmission gear 12 for the main drive in the longitudinal direction X.

[0063] The input element and the output element of the switching element 42 for the auxiliary drive are arranged above the drive axle 2 in the direction of gravity Z.

[0064] The output shaft of the drive motor 20 for the auxiliary drive is arranged above the input element of the switching element 42 for the auxiliary drive in the shear force direction Z. The input element of the second output element 29 for the auxiliary drive is arranged below the drive axle 2 in the shear force direction Z. The input element of the switching element 42 for the auxiliary drive, the output shaft of the drive motor 20 for the auxiliary drive, and the input element of the second output element 29 for the auxiliary drive are arranged obliquely from top to bottom in the direction of gravity Z and from left to right in the transverse direction Y. The output shaft of the drive motor 20 for the auxiliary drive forms the highest point in the direction of gravity Z.

[0065] The output gear of the third transmission 23 for the auxiliary drive is arranged in the direction of gravity Z below the input gear of the third transmission 23 for the auxiliary drive and below the drive axle 2. In one embodiment, no final transmission 25 for the auxiliary drive is present. The output gear of the third transmission 23 for the auxiliary drive forms the first output element 28 for the auxiliary drive at an end section in the longitudinal direction X at the rear.

[0066] Reference symbol

[0067] 1 Main drive world

[0068] 2 drive axle

[0069] 8 First output shaft

[0070] 9 Second output shaft

[0071] 10 Drive motor for the main drive

[0072] 11 First transmission gear for the main drive

[0073] 12 Second transmission gear for the main drive

[0074] 13 Third transmission gear for the main drive

[0075] 14 Gear unit

[0076] 15 final transmission gears for the main drive

[0077] 18 First output element for the main drive

[0078] 19 Second output element for the main drive

[0079] 20 Drive motor for the auxiliary drive

[0080] 21 First transmission gear for the auxiliary drive

[0081] 22 Second transmission gear for the auxiliary drive

[0082] 23 Third transmission gear for the auxiliary drive

[0083] 25 final drive transmission for the auxiliary drive

[0084] 28 First output element for the auxiliary drive

[0085] 29 Second output element for the auxiliary drive

[0086] 41 Switching element for the main drive

[0087] 42 Switching element for the auxiliary drive

[0088] X Longitudinal direction

[0089] Y transverse direction

[0090] Z Direction of gravity

Claims

Patent claims 1. Drive device for a vehicle with a drive motor (10) for a main drive, a drive motor (20) for a secondary drive, a first output element (18) for the main drive, and a first output element (28) for the secondary drive, wherein the drive motor (10) for the main drive is mechanically operatively connected via a main drive shaft (1) to a transmission unit (14) which is mechanically operatively connected to the first output element (18) for the main drive, the main drive shaft (1), the transmission unit (14), and the drive motor (10) for the main drive are arranged coaxially to a drive axle (2), the drive motor (20) for the secondary drive is mechanically operatively connectable to the first output element (28) for the secondary drive via a switching element (42) for the secondary drive, the switching element (42) for the secondary drive in a transverse direction (Y) in which the drive axle (2) is arranged,is arranged between the drive machine (10) for the main drive and the transmission unit (14), the transmission unit (14) and the drive machine (10) for the main drive are arranged in the transverse direction (Y) on opposite sides of the main drive shaft (1), and the drive machine (20) for the auxiliary drive and the first output element (28) for the auxiliary drive are arranged in a longitudinal direction (X) transverse to the drive axis (2).

2. Drive device according to claim 1, characterized in that the switching element (42) for the auxiliary drive is arranged in front of the drive axle (2) in the longitudinal direction (X) of the vehicle.

3. Drive device according to claim 1, characterized in that the switching element (42) for the auxiliary drive is arranged in the longitudinal direction (X) of the vehicle behind the drive axle (2) and in a direction of gravity (Z) offset upwards relative to the drive axle (2).

4. Drive device according to one of the preceding claims, characterized in that the gear unit (14) is mechanically operatively connected to the first output element (18) for the main drive via a final transmission gear (15) for the main drive and the final transmission gear (15) for the main drive is arranged in the transverse direction (Y) between the gear unit (14) and the first output element (18) for the main drive.

5. Drive device according to one of the preceding claims, characterized in that the drive machine (10) for the main drive is mechanically connected to a second output element (19) for the main drive.

6. Drive device according to one of claims 1 - 4, characterized in that the drive machine (10) for the main drive is mechanically operatively connectable via a switching element (41) for the main drive to a second output element (19) for the main drive, which is arranged in the longitudinal direction (X) in front of the drive axle (2).

7. Drive device according to claim 5 or 6, characterized in that the drive machine (10) for the main drive is mechanically operatively connectable to the second output element (19) for the main drive via at least two transmission gears (11, 12, 13) for the main drive, wherein one of the transmission gears (11, 12, 13) for the main drive is formed by a bevel gear 8. Drive device according to one of the preceding claims, characterized in that the drive machine (20) for the auxiliary drive can be mechanically operatively connected to the first output element (28) for the auxiliary drive via at least two transmission gears (21, 22, 23) for the auxiliary drive.

9. Drive device according to one of the preceding claims, characterized in that the drive machine (20) for the auxiliary drive is mechanically operatively connected to a second output element (29) for the auxiliary drive, which is arranged in the longitudinal direction (X) with respect to the drive axle (2) on the same side on which the drive machine (20) for the auxiliary drive is arranged.

10. Vehicle with a drive device according to one of the preceding claims, and two first output elements (18) for the main drive, wherein the two first output elements (18) for the main drive are arranged in the transverse direction (Y) on opposite sides of the vehicle, and the drive device is arranged to drive the vehicle via the two first output elements (18) for the main drive.

Images