Power-split axle drive for a working machine and a working machine

Abstract

Power-split axle drive for a working machine, comprising a main drive element (1), at least one auxiliary drive element (2), a first vehicle axle (3a), a second vehicle axle (3b), a main gearbox (5) and a power-split gearbox (6), wherein the power-split gearbox (6) has a planetary gear set (7) with several planet gears (8) rotatably mounted on a planet carrier (9), wherein the planet gears (8) are in tooth mesh with a ring gear (10) and with a sun gear (11), wherein the at least one auxiliary drive element (2) is operatively connected to the sun gear (11) via a first spur gear stage (4a) comprising a first and second fixed gear (F1, F2), wherein the ring gear (10) is further operatively connected to the first vehicle axle (3a) via a second spur gear stage (4b) comprising a third and fourth fixed gear (F3, F4),wherein the first planet carrier (9) is operatively connected to the second vehicle axle (3b) and wherein the power split transmission (6) has an oil guide device (15) for targeted oil guidance within the power split transmission (6) and wherein the oil guide device (15) has an oil guide area (17) on a circumferential surface, characterized in that at least the power split transmission (6) is integrated in the main transmission (5), wherein the oil guide area (17) is provided to radially collect and axially guide oil delivered by the third fixed gear (F3) into the oil guide device (15).

Description

[0001] The invention relates to a power-split axle drive for a work machine. The use of the power-split axle drive primarily extends to work machines.

[0002] In this context, work machinery refers, in particular, to machines that, due to their design and their special equipment permanently attached to the vehicle, are intended and suitable for performing work, but not for transporting people or goods. Examples include agricultural or forestry machinery or construction machinery. Examples include agricultural tractors.

[0003] Power-split refers to the fact that an input power is divided into several power branches. The respective power branches can be mechanical, hydraulic, electrical, or a combination of the aforementioned.

[0004] DE 10 2013 224 383 A1 discloses a power-split axle drive. This comprises at least one main drive element, a first auxiliary drive element, a second auxiliary drive element, a first vehicle axle, a second vehicle axle, and a main transmission. A rotational movement or torque that can be generated by the main drive element can be introduced into the main transmission and / or the first auxiliary drive element via a first shaft, wherein at least the first vehicle axle can be driven via the main transmission by the rotational movement or torque of the main drive element. The power-split axle drive has a power-split transmission, which is connected to the first vehicle axle and the main transmission via a second shaft, to the second auxiliary drive element via a third shaft, and to the second vehicle axle via a fourth shaft.The second additional drive element acts on the power split transmission, whereby the advance of the second vehicle axle can be controlled.

[0005] JP 2005-90648 A discloses a torque distribution device comprising a center differential, a first sun gear, a second sun gear, and first and second pinion gears. The first sun gear serves as an input element to which power is transmitted from a vehicle's power source. The second sun gear serves as a first output element. A carrier supporting the first and second pinion gears serves as a second output element to adjust the torque distribution ratio for the front and rear wheels. An engine torque adding mechanism is installed between the first and second output elements of the center differential.

[0006] DE 102 41 457 A1 relates to a transfer case for distributing drive power to a first axle and a second axle of a vehicle. The transfer case is arranged between the first and second axles. The transfer case comprises a planetary gear with a central gear and a planetary gear carrier with multiple planetary gears, as well as an electric motor. The electric motor is connected to an element of the planetary gear. The drive power is distributed to the two axles by controlling the electric motor to generate a predetermined torque on one of the elements of the planetary gear, thereby determining the torques of the other two elements of the planetary gear, each of which is connected to one of the axles.

[0007] DE 103 19 681 A1 discloses a transfer case with at least three shafts for distributing drive torque to at least two drive axles as needed. A first shaft is operatively connected to a first drive axle and can be acted upon by the drive torque. A second shaft is operatively connected to a second drive axle, and a torque of a machine device that influences the degree of distribution of the drive torque between the drive axles can be applied to a third shaft.

[0008] DE 10 2006 034 153 A1 discloses a transmission comprising a housing, a first output shaft, a second output shaft, and a clutch system for distributing torque between the output shafts. At least two transmission components are operatively connected between the output shafts and generate a lubricating oil pressure. A separate pipe extends within the housing from the at least two transmission components to the clutch system to supply lubricating oil to the clutch system.

[0009] DE 10 2013 224 383 A1 discloses a power-split axle drive, comprising at least one main drive element, a first auxiliary drive element, a second auxiliary drive element, a first vehicle axle, a second vehicle axle, and a main transmission. A rotational movement or torque that can be generated by the main drive element can be introduced into the main transmission or the first auxiliary drive element via a first shaft. At least the first vehicle axle can be driven via the main transmission by the rotational movement or the torque of the main drive element. The power-split axle drive has a power-split transmission, which is connected to the first vehicle axle and the main transmission via a second shaft, to the second auxiliary drive element via a third shaft, and to the second vehicle axle via a fourth shaft.The second additional drive element acts on the power split transmission, whereby the advance of the second vehicle axle can be controlled.

[0010] The object of the present invention is to further develop a power-split axle drive for a work machine and, in particular, to make it more compact.

[0011] The object is achieved by the subject matter of patent claim 1. Preferred embodiments are the subject matter of the dependent claims.

[0012] A power-split axle drive according to the invention for a work machine comprises a main drive element, at least one additional drive element, a first vehicle axle, a second vehicle axle, a main transmission and a power-split transmission, wherein the power-split transmission has a planetary gear set with a plurality of planet gears rotatably mounted on a planet carrier, wherein the planet gears mesh with a ring gear and with a sun gear, wherein at least the power-split transmission is integrated in the main transmission, wherein the at least one additional drive element is operatively connected to the sun gear via a first spur gear stage comprising a first and second fixed gear, wherein the ring gear is further operatively connected to the first vehicle axle via a second spur gear stage comprising a third and fourth fixed gear, and wherein the first planet carrier is operatively connected to the second vehicle axle.

[0013] The main drive element is preferably an internal combustion engine, for example, a gas, gasoline, or diesel engine. Alternatively, the main drive element can also be implemented in the form of an electric motor.

[0014] The at least one additional drive element is preferably an electric machine. Furthermore, it is also conceivable to use a hydraulic machine, for example a hydrostatic drive element. Preferably, the at least one additional drive element acts on the power split transmission, whereby in particular a forward travel of the second vehicle axle can be controlled. In particular, the at least one additional drive element also enables operation of the work machine without a main drive element and a variable torque distribution between the first and second vehicle axles. The invention includes the technical teaching that the at least one additional drive element can be operated both as a generator and as a motor. In generator operation, the at least one additional drive element has a braking effect, i.e., mechanical energy from a rotational movement is converted, for example, into electrical energy.In contrast, during motor operation of the at least one additional drive element, energy, in particular electrical energy from an electrical energy source, is fed into the at least one additional drive element, whereby a rotational movement or a torque is generated.

[0015] According to a preferred embodiment, the power-split axle drive has a storage element. The storage element is particularly characterized by its ability to absorb, store, and release energy. The storage element is preferably a battery, an accumulator, or a capacitor for storing electrical energy. However, in further embodiments, pressure accumulators for storing compressed gases or fluids, or kinetic energy storage devices, are also conceivable. In a kinetic energy storage device, kinetic energy is stored, for example, in rotating masses.

[0016] The first vehicle axle and the second vehicle axle are vehicle axles that can be designed to be driven. Furthermore, both the first vehicle axle and / or the second vehicle axle can be designed to be steerable.

[0017] The main transmission is preferably characterized by the fact that the speed or torque is transmitted from a transmission input to a transmission output. The transmission input is located on a side of the main transmission, preferably facing the main drive element. The transmission output is preferably located on a side of the main transmission opposite the transmission input. The main transmission can be designed as a stepped automatic transmission, a continuously variable transmission (CVT), a manual transmission, or even a dual-clutch transmission.

[0018] A power split transmission is a planetary gear or epicyclic gear. Such a planetary gear has at least three shafts: the sun gear, the ring gear, and the planet carrier. In two-shaft operation, a first shaft is driven, a second shaft is stationary, and the output is via a third shaft. In three-shaft operation, the planetary gear operates as a summing transmission or transfer case. In a summing transmission, two shafts are driving and one shaft is driven. In contrast, in a transfer case, one shaft is driving and two shafts are driven.

[0019] In the following, a shaft is not only understood to mean a cylindrical, rotatably mounted machine element for transmitting torque, but rather also to mean general connecting elements that connect individual components or elements to one another.

[0020] The fact that at least the power-split transmission is integrated into the main transmission saves installation space, allowing the power-split axle drive to be designed more compactly. In particular, in addition to the power-split transmission, at least one auxiliary drive element is also integrated into the main transmission. Thus, the power-split transmission and the main transmission are not spatially separated from one another, but rather nested within one another in such a way that, compared to a main transmission with a non-integrated power-split transmission, various transmission elements, such as shafts and gears, as well as housing parts, are eliminated.

[0021] A fixed gear is a gear, particularly a spur gear, that is non-rotatably connected to a shaft. Two meshing fixed gears form a spur gear stage. Two meshing or meshing gears are designed to transmit torque and speed from one gear to the other. A gear can be, for example, a sun gear, a ring gear, a planetary gear, or a fixed gear.

[0022] The term "operably connected" means that two elements can be directly connected to one another, or that there are additional elements between them, such as one or more gears or shafts. Therefore, an at least indirect connection between two transmission components includes both a direct and thus immediate connection between the two transmission components, as well as an indirect and thus indirect connection between the two transmission components.

[0023] The second spur gear stage and the power-splitting transmission are advantageously designed such that, at a nominal tire radii ratio on the first and second vehicle axles, the sun gear essentially does not rotate. As a result, the drive energy required by the at least one auxiliary drive element is relatively low.

[0024] Preferably, the first fixed gear is arranged in a rotationally fixed manner on a rotor shaft of the auxiliary drive element. In particular, a rotor of an electric machine is arranged in a rotationally fixed manner on the rotor shaft, with the stator being fixedly received in the main transmission.

[0025] The second fixed gear is preferably arranged in a rotationally fixed manner on a first shaft, wherein the first shaft is connectable to a housing via a brake. A brake is preferably understood to be a frictionally engaged switching element which is connected on one side to a stationary element, for example a housing or a vehicle frame, and on the other side to a rotatable element, namely the first shaft. In this case, a force is generally introduced onto the connection point via an actuator, whereby a frictional force is generated which, for example, supports a rotational movement of the rotatable component against the stationary component and thus inhibits or prevents the rotational movement. The actuator for actuating the brake can be designed to be hydraulically, electromechanically, electromagnetically, or, for example, pneumatically actuated. An actuated brake is preferably understood to mean an open brake.This means that the rotatable component is in freewheel mode, which means that the brake preferably has no influence on the speed of the rotatable component. In particular, a pressurized brake is provided for actuating the brake. When the brake is not actuated or engaged, a rotationally fixed connection is established between the rotatable component and the stationary component. If the brake is switched from the actuated to the deactuated state, the speed of the rotatable component is initially reduced. Depending on the application, the speed of the rotatable component can be reduced all the way to a standstill. Alternatively, designs are also conceivable in which the brake is open when not actuated and closed when actuated. A positive-locking brake is also conceivable in further alternative embodiments.With positive-locking connections, a rotationally fixed connection between two components is achieved through the engagement of the contours of the components to be joined. Positive-locking connections have the particular advantage of being able to transmit high forces and torques while being comparatively small in size and weight. Furthermore, the energy required to create the connection is significantly lower than with frictional connections, which allows for smaller actuator designs, for example.

[0026] Furthermore, the first shaft is preferably rotatably mounted at least via a first and a second bearing element, wherein the first bearing element is arranged axially adjacent to the brake on a first side of the brake, and wherein the second bearing element is arranged axially adjacent to the brake on a second side of the brake. Thus, the brake is axially integrated between the first and second bearing elements in a space-neutral manner.

[0027] Furthermore, the third fixed gear is preferably arranged in a rotationally fixed manner on a second shaft, wherein the second shaft is rotationally fixedly connected to the ring gear and is designed as a hollow shaft. In particular, the second shaft is arranged coaxially to the first shaft and parallel to the rotor shaft.

[0028] Preferably, the planet carrier is rotationally fixedly connected to a third shaft, wherein the third shaft is arranged coaxially to the second shaft, and wherein the third shaft extends axially through the second shaft. Furthermore, the third shaft is arranged coaxially to the first shaft and is parallel to the rotor shaft.

[0029] Preferably, the fourth fixed gear is arranged in a rotationally fixed manner on a fourth shaft, wherein the fourth shaft is operatively connected to the first vehicle axle, and wherein the fourth fixed gear meshes with a fifth and sixth fixed gear in addition to the third fixed gear. Thus, the fourth fixed gear meshes with a total of three fixed gears, namely the third, fifth, and sixth fixed gears.

[0030] According to the invention, the power-split transmission comprises an oil guide device for targeted oil flow within the power-split transmission. Targeted oil flow within the power-split transmission allows for optimal cooling and lubrication of the power-split transmission and the transmission elements arranged therein. In particular, the oil guide device also serves to isolate the power-split transmission from the main transmission.

[0031] In particular, the oil guide device surrounds at least the first spur gear stage, the second spur gear stage, the sun gear, the ring gear, and the planetary gear set at least partially radially and / or axially. Thus, the oil guide device is designed and arranged in the power-split transmission such that at least the first spur gear stage, the second spur gear stage, the sun gear, the ring gear, and the planetary gear set are optimally lubricated and cooled by the oil guide device, with an oil barrier being implemented outside these elements. In particular, the oil guide device ensures an oil level in the power-split transmission that is lower than the oil level in the main transmission.The oil from the main transmission is metered into the power-split transmission, preferably via an oil filter, with the oil from the power-split transmission being fed back into the main transmission, preferably via the third fixed gear or alternatively via the second fixed gear. This creates an oil circuit between the power-split transmission and the main transmission, with two different oil levels being achieved. Because the oil level in the power-split transmission is lower than in the main transmission, churning losses are minimized. Furthermore, the oil circuit enables a reduction in the oil temperature within the oil guide system in the power-split transmission through the continuous supply of oil from the main transmission.

[0032] The oil guide device is preferably formed in multiple parts from an injection-molded material or a sheet metal material. According to a preferred embodiment, the oil guide device is formed in three parts. The respective parts of the oil guide device are produced, for example, from a polymer using an injection-molding process or from a metal sheet by forming. Advantageously, the respective parts of the oil guide device are arranged individually in the power-split transmission and connected to one another there.

[0033] According to a preferred embodiment, the oil guide device is sleeve-shaped and has a receiving area that corresponds at least partially to the rotor shaft, wherein the receiving area is provided to at least partially receive the rotor shaft and guide it axially through the oil guide device. In other words, the rotor shaft extends along a circumference of the sleeve-shaped oil guide device, wherein a part of the inner circumferential surface of the oil guide device is designed as a receiving area for at least partially receiving the rotor shaft. In particular, the receiving area encloses at least half of the rotor shaft, preferably over 60%. The rotor shaft is advantageously arranged in a contactless manner in the receiving area.

[0034] According to the invention, the oil guide device has an oil guide region on a circumferential surface, wherein the oil guide region is provided to radially collect and axially guide oil conveyed into the oil guide device by the third fixed gear. In particular, the oil guide region is helical and extends at least partially along the inner circumferential surface of the oil guide device. The oil level in the power-split transmission is lower than the oil level in the main transmission, wherein the third fixed gear scoops the oil out of the oil guide device and thus out of the power-split transmission through a recess in the circumferential surface of the oil guide device.

[0035] In the following, an exemplary embodiment of the invention is explained in more detail with reference to the figures. Fig. 1 a simplified schematic representation of a power-split axle drive according to the invention, Fig. 2 a schematic perspective view of an oil guide device according to the invention of the power-split axle drive according to Fig. 1. Fig. 3 a schematic end view of the oil guide device according to the invention according to Fig. 2, and Fig. 4 a schematic sectional view of the oil guide device according to the invention according to the Fig. 2 and Fig. 3.

[0036] According to Fig. 1, a power-split axle drive according to the invention for a work machine (not shown here) comprises a main drive element 1, at least one auxiliary drive element 2, a first vehicle axle 3a, a second vehicle axle 3b, a main transmission 5, and a power-split transmission 6. The power-split transmission 6 and the auxiliary drive element 2 are integrated into the main transmission 5. The auxiliary drive element 2 is designed as an electric machine and comprises a stator 19 fixed to the housing and a rotor 20 movably arranged therein, which is connected in a rotationally fixed manner to a rotor shaft 12.

[0037] The power-split transmission 6 has a planetary gear set 7 with a plurality of planet gears 8 rotatably mounted on a planet carrier 9. The planet gears 8 mesh with a ring gear 10 and a sun gear 11. The auxiliary drive element 2 is operatively connected to the sun gear 11 via a first spur gear stage 4a, comprising a first and second fixed gear F1, F2. The first fixed gear F1 is arranged in a rotationally fixed manner on the rotor shaft 12 of the auxiliary drive element 2. The second fixed gear F2 is arranged in a rotationally fixed manner on a first shaft W1, wherein the first shaft W1 is connectable to a housing 13 via a brake B. The first shaft W1 is rotatably mounted via a first and second bearing element 14a, 14b. The first bearing element 14a is arranged axially adjacent to the brake B on a first side of the brake B and the second bearing element 14b is arranged axially adjacent to the brake B on a second side of the brake B.The ring gear 10 is operatively connected to the first vehicle axle 3a via a second spur gear stage 4b, comprising a third and fourth fixed gear F3, F4. The third fixed gear F3 is arranged in a rotationally fixed manner on a second shaft W2, wherein the second shaft W2 is rotationally fixedly connected to the ring gear 10 and is designed as a hollow shaft. The planet carrier 9 is rotationally fixedly connected to a third shaft W3, wherein the third shaft W3 is operatively connected to the second vehicle axle 3b. Furthermore, the third shaft W3 is arranged coaxially to the second shaft W2, wherein the third shaft W3 extends axially through the second shaft W2.

[0038] The fourth fixed gear F4 is arranged in a rotationally fixed manner on a fourth shaft W4, wherein the fourth shaft W4 is operatively connected to the first vehicle axle 3a. The fourth fixed gear F4 is in meshing engagement with the third fixed gear F3 as well as with a fifth and sixth fixed gear F5, F6. The fifth fixed gear F5 is arranged in a rotationally fixed manner on a fifth shaft W5, wherein the sixth fixed gear F6 is arranged in a rotationally fixed manner on a sixth shaft W6. The main transmission 5 comprises a gear ratio adjustment device 21, which is not shown in detail. The gear ratio adjustment device 21 is intended to adjust the speed and, in particular, to realize different gear ratios. For example, the gear ratio adjustment device 21 can be designed as a continuously variable transmission, torque converter transmission, or countershaft transmission. The fifth and sixth shafts W5, W6 are operatively connected to the main drive element 1 via the gear ratio adjustment device 21.Furthermore, the sixth shaft W6 is designed as a hollow shaft, with a seventh shaft W7 extending axially through the sixth shaft W6. The seventh shaft W7 also extends through the gear ratio adjustment device 21 and is operatively connected at least to the main drive element 1. Furthermore, the seventh shaft W7 is also provided for the auxiliary drive, with the seventh shaft W7 optionally being operatively connected on the output side to a power take-off transmission (not shown here).

[0039] The power-split transmission 6 has an oil guide device 15 for targeted oil guidance within the power-split transmission 6. The oil guide device 15 surrounds the first spur gear stage 4a, the second spur gear stage 4b, the sun gear 11, the ring gear 10, and the planetary gear set 7 at least partially radially and axially. Furthermore, the oil guide device 15 is provided to implement an oil barrier for the power-split transmission 6.

[0040] In the Fig. 2, Fig. 3 and Fig. 4 shows the oil guide device 15 in detail. Fig. 2 and Fig. 3, the oil guide device 15 is formed in three parts from a sheet metal material, wherein the three parts of the oil guide device 15 are detachably connected to one another by means of screws. Alternatively, the oil guide device 15 can be formed in several parts from an injection-molded material, wherein the respective parts of the oil guide device 15 can be detachably or non-detachably connected to one another by means of clips, rivets, or similar connecting means. According to an alternative embodiment, it is also conceivable to form the oil guide device 15 in several parts from a sheet metal material. The oil guide device 15 is sleeve-shaped and has a recess 18 on a circumferential surface. The recess 18 enables the connection between the third and fourth fixed gears F3, F4. Furthermore, the oil guide device 15 has a receiving area 16 that is formed at least partially corresponding to the rotor shaft 12.The receiving area 16 is intended to at least partially accommodate the rotor shaft 12, in particular to enclose it at least 60%, and to guide it axially through the oil guide device 15. Furthermore, the oil guide device 15 has an oil guide area 17 on a circumferential surface. The oil guide area 17 is intended to collect oil conveyed from the third fixed gear F3 into the oil guide device 15 and to guide it axially, in particular to sling it past the fixed gear F4.

[0041] According to Fig. 3, the third fixed gear F3 rotates in a counterclockwise direction 22. Thus, the oil is thrown counterclockwise along the oil guide area 17 through the recess 18 out of the oil guide device 15.

[0042] In Fig. 4 shows a sectional view of the oil guide device 15, wherein the section is taken along a Fig.3. The oil guide region 17 is helical, with the rotating fixed gear F3 scooping the oil located in the oil guide region 17 out of the oil guide device 15. In particular, oil flows back from a housing part of the additional drive element 2 into the transmission chamber of the power split transmission 6. The diameter of the oil guide device 15 changes in the oil guide region 17 in the axial direction, with the diameter increasing from the end face of the oil guide device 15 to the center of the oil guide device 15 for radial collection and axial guidance of the oil.

[0043] The invention is not limited to the preceding embodiment. Further possible developments can be found in particular in the description and the claims. For example, the auxiliary drive unit 2 can also be designed as a hydraulic machine. Furthermore, it is also conceivable for the oil to be thrown out of the oil guide device 15 by the second fixed gear F2. Reference symbol 1 main drive element 2 additional drive element 3a first vehicle axle 3b second vehicle axle 4a first spur gear stage 4b second spur gear stage 5 main gearbox 6 power split transmissions 7 planetary gear set 8 Planetary gear 9 planet carriers 10 ring gear 11 Sun gear 12 Rotor shaft 13 housings 14a first bearing element 14b second bearing element 15 Oil guide device 16 Recording area 17 Oil guide area 18 Recess 19 Stator 20 rotors 21 Translation adjustment device 22 Direction of rotation of the third fixed gear B Brake F1 first fixed gear F2 second fixed gear F3 third fixed gear F4 fourth fixed gear F5 fifth fixed gear F6 sixth fixed gear W1 first wave W2 second wave W3 third wave W4 fourth wave W5 fifth wave W6 sixth wave W7 seventh wave AA cutting line

Claims

[1] Power-split axle drive for a work machine, comprising a main drive element (1), at least one auxiliary drive element (2), a first vehicle axle (3a), a second vehicle axle (3b), a main transmission (5), and a power-split transmission (6), wherein the power-split transmission (6) has a planetary gear set (7) with a plurality of planetary gears (8) rotatably mounted on a planet carrier (9), wherein the planetary gears (8) mesh with a ring gear (10) and with a sun gear (11), wherein the at least one auxiliary drive element (2) is operatively connected to the sun gear (11) via a first spur gear stage (4a) comprising a first and second fixed gear (F1, F2), wherein the ring gear (10) is further operatively connected to the first vehicle axle (3a) via a second spur gear stage (4b) comprising a third and fourth fixed gear (F3, F4),wherein the first planetary carrier (9) is operatively connected to the second vehicle axle (3b) and wherein the power split transmission (6) has an oil guide device (15) for targeted oil guidance within the power split transmission (6) and wherein the oil guide device (15) has an oil guide region (17) on a circumferential surface, , characterized by that at least the power split transmission (6) is integrated in the main transmission (5), wherein the oil guide region (17) is provided to radially collect and axially guide an oil conveyed by the third fixed gear (F3) into the oil guide device (15). [2] Power-split axle drive according to claim 1, characterized by that the first fixed gear (F1) is arranged in a rotationally fixed manner on a rotor shaft (12) of the additional drive element (2). [3] Power-split axle drive according to one of the preceding claims, characterized bythat the second fixed gear (F2) is arranged in a rotationally fixed manner on a first shaft (W1), wherein the first shaft (W1) can be connected to a housing (13) via a brake (B). [4] Power-split axle drive according to claim 3, characterized by in that the first shaft (W1) is rotatably mounted at least via a first and second bearing element (14a, 14b), wherein the first bearing element (14a) is arranged axially adjacent to the brake (B) on a first side of the brake (B), and wherein the second bearing element (14b) is arranged axially adjacent to the brake (B) on a second side of the brake (B). [5] Power-split axle drive according to one of the preceding claims, characterized by that the third fixed gear (F3) is arranged in a rotationally fixed manner on a second shaft (W2), wherein the second shaft (W2) is connected in a rotationally fixed manner to the ring gear (10) and is designed as a hollow shaft. [6] Power-split axle drive according to claim 5, characterized bythat the planet carrier (9) is connected in a rotationally fixed manner to a third shaft (W3), wherein the third shaft (W3) is arranged coaxially to the second shaft (W2), and wherein the third shaft (W3) is guided axially through the second shaft (W2). [7] Power-split axle drive according to one of the preceding claims, characterized by that the fourth fixed gear (F4) is arranged in a rotationally fixed manner on a fourth shaft (W4), wherein the fourth shaft (W4) is operatively connected to the first vehicle axle (3a), and wherein the fourth fixed gear (F4) is in tooth engagement with a fifth and sixth fixed gear (F5, F6) in addition to the third fixed gear (F3). [8] Power-split axle drive according to one of the preceding claims, characterized by that the oil guide device (15) at least partially radially and / or axially surrounds at least the first spur gear stage (4a), the second spur gear stage (4b), the sun gear (11), the ring gear (10) and the planetary gear set (7). [9] Power-split axle drive according to one of the preceding claims, characterized by that the oil guide device (15) is formed in several parts from an injection-molded material or a sheet metal material. [10] Power-split axle drive according to one of the preceding claims, characterized by in that the oil guide device (15) is sleeve-shaped and has a receiving area (16) which is at least partially designed to correspond to the rotor shaft (12), wherein the receiving area (16) is provided to at least partially receive the rotor shaft (12) and to guide it axially through the oil guide device (15). [11] Work machine comprising a power-split axle drive according to one of claims 1 to 10.

Images