Drive arrangement and a vehicle with such a drive arrangement

Abstract

The invention relates to a drive arrangement, in particular for a vehicle, with features of claim 1 and a vehicle, in particular a motor vehicle, with at least one such drive arrangement.

Description

State of the art

[0001] The invention relates to a drive arrangement, in particular for a vehicle, having the features of claim 1, and to a vehicle, in particular a motor vehicle, having the features of the independent claim.

[0002] Commercial vehicles typically have driven rigid rear axles with a differential. Banjo axles offer the advantage that the entire axle head (including differential) can be mounted and adjusted as an assembly outside of an axle housing.

[0003] It is desirable to electrify a conventional banjo rigid axle. US 2021 / 262 564 A1 and US 2019 / 315 216 A1 each disclose a banjo axle assembly with an electric motor driving the axle assembly.

[0004] The disadvantage is that implementing an electric machine in a drive arrangement requires a relatively large installation space, which is only available to a limited extent. Disclosure of the invention

[0005] According to the invention, a drive arrangement, in particular for a vehicle, is proposed, comprising a banjo axle (rigid axle). The banjo axle comprises a differential with a differential gear and two output shafts coupled to the differential. The differential gear is rotatable about a rotational axis. The output shafts are arranged on opposite sides of the differential, each along the rotational axis. The drive arrangement comprises an electric machine with a drive shaft. The drive arrangement comprises a planetary gear. The drive shaft and the differential gear are drivingly coupled to one another by means of the planetary gear.

[0006] In this context, a drive coupling refers to a coupling that enables torque transmission. In other words, torque can be transferred from one element to the other (or vice versa) using two elements that are coupled to each other in a drive-related manner (e.g., gears).

[0007] This allows for simple electrification of the drive system, while utilizing the available installation space as efficiently as possible. The drive system can thus be implemented as compactly as possible.

[0008] According to a further development of the drive arrangement, the planetary gear can be designed with at least two stages, in particular three stages. The individual stages of the planetary gear and in particular the drive shaft can be arranged coaxially with one another.

[0009] This allows the desired translation or desired translation levels to be implemented as compactly as possible using simple means.

[0010] According to a further development of the drive arrangement, the planetary gear can comprise a first sun gear, a plurality of first planet gears, a first planet carrier, and a first ring gear. The first sun gear can be arranged on the drive shaft in a rotationally fixed manner. The first planet gears can each be rotatably mounted on the first planet carrier. The first ring gear can be rotationally fixed. The first ring gear can be fixedly connected to a transmission housing. The first planet gears can mesh with the first ring gear and the first sun gear.

[0011] The drive arrangement may comprise a second sun gear, a plurality of second planet gears, a second planet carrier, and a second ring gear. The second sun gear may be coupled, in particular connected, to the first planet carrier in a rotationally fixed manner. The second planet gears may each be rotatably mounted on the second planet carrier. The second ring gear may be rotationally fixed. The second ring gear may be fixedly connected to the transmission housing. The second planet gears may mesh with the second ring gear and with the second sun gear. The second planet carrier and the differential gear may be drivingly coupled to one another.

[0012] This allows the planetary gear to be implemented into the drive arrangement using simple means.

[0013] According to a further development of the drive arrangement, the planetary gear can comprise a third sun gear, a plurality of third planet gears, a third planet carrier, and a third ring gear. The third sun gear can be coupled, in particular connected, to the second planet carrier in a rotationally fixed manner. The third planet gears can each be rotatably mounted on the third planet carrier. The third planet carrier can be designed to be rotationally fixed. The third planet carrier can be fixedly connected to the transmission housing. The third ring gear can be designed to be rotatably mounted. The third planet gears can mesh with the third ring gear and the third sun gear. The third ring gear can have external teeth. The external teeth of the third ring gear can mesh with the differential gear.

[0014] The first sun gear may be formed as a first sun shaft, the second sun gear may be formed as a second sun shaft and / or the third sun gear may be formed as a third sun shaft.

[0015] This allows a three-stage planetary gear to be implemented into the drive arrangement using simple means.

[0016] According to a further development of the drive arrangement, the planetary gear can comprise a first spur gear and a second spur gear. The second planet carrier can be non-rotatably coupled, in particular connected, to the first spur gear. The second spur gear can mesh with the first spur gear and the differential gear. The first spur gear and the second spur gear can form a gear chain.

[0017] This allows a two-stage planetary gear and a gear chain to be implemented into the drive arrangement using simple means.

[0018] According to a further development of the drive arrangement, the drive arrangement can comprise a parking lock with a parking lock gear for interrupting the transmission of torque between the drive shaft and the differential gear. The parking lock gear can be arranged on the drive shaft in a rotationally fixed manner.

[0019] This allows for a simple interruption of torque transmission within the drive assembly. A parking function of the drive assembly or a vehicle comprising the drive assembly can be implemented with simple means.

[0020] According to a further development of the drive arrangement, the drive shaft, the first sun gear, the first planet carrier, the first ring gear, the second sun gear, the second planet carrier, the second ring gear, the third sun gear, the third planet carrier, the third ring gear, the first spur gear, and / or the parking lock gear can be arranged coaxially with one another. The drive shaft can be oriented parallel to the rotational axis.

[0021] This allows the planetary gear and thus the entire drive arrangement to be implemented as compactly as possible.

[0022] According to a further development of the drive assembly, the drive assembly may comprise an axle housing. The differential, the differential gear, and / or the output shafts may be arranged at least partially within the axle housing.

[0023] This allows the components located within the axle housing to be assembled and / or protected using simple means.

[0024] According to a further development of the drive assembly, the drive assembly can comprise a transmission housing. The planetary gear and / or the electric motor can be arranged at least partially within the transmission housing. The transmission housing can be connected, in particular screwed, to the axle housing.

[0025] This allows the components located inside the gearbox housing to be assembled and / or protected using simple means.

[0026] According to the invention, a vehicle, in particular a motor vehicle, is proposed with a drive arrangement as described above. Regarding the advantages achievable thereby, reference is made to the relevant explanations regarding the drive arrangement. The measures described in connection with the drive arrangement and / or those explained below can be used to further configure the vehicle.

[0027] Embodiments of the invention are explained below with reference to the accompanying drawings. They show: Fig. 1 a schematic representation of a drive arrangement according to a first embodiment and Fig. 2 a schematic representation of the drive arrangement according to a second embodiment.

[0028] The drive arrangement contributes to Fig. 1 is designated overall by reference numeral 10. The drive assembly 10 comprises a banjo axle 12 (rigid axle). The banjo axle 12 comprises a differential 14 with a differential gear 16 and two output shafts 18 coupled to the differential 14. The differential gear 16 is rotatable about a rotational axis 20. The output shafts 18 are arranged on opposite sides of the differential 14. The output shafts 18 are each oriented along the rotational axis 20.

[0029] The drive arrangement 10 comprises an electric machine 22 with a drive shaft 24. The drive arrangement 10 comprises a planetary gear 26. The drive shaft 24 and the differential gear 16 are drivingly coupled to one another by means of the planetary gear 26.

[0030] Fig. 1 shows a schematic representation of the drive arrangement 10 according to a first embodiment.

[0031] In the illustrated embodiment, the planetary gear 26 is designed with three stages. It is conceivable that the planetary gear 26 could be designed with at least two stages.

[0032] The drive assembly 10 comprises a transmission housing 62. The planetary gear 26 is arranged at least partially within the transmission housing 62. Additionally or alternatively, the electric machine 22 can be arranged at least partially within the transmission housing 62.

[0033] The planetary gear 26 comprises (in the first stage) a first sun gear 28, a plurality of first planet gears 30, a first planet carrier 32, and a first ring gear 34. The first sun gear 28 is arranged on the drive shaft 24 in a rotationally fixed manner. The first planet gears 30 are each rotatably mounted on the first planet carrier 32. The first ring gear 34 is designed to be rotationally fixed. The first ring gear 34 can be fixedly connected to the gear housing 62. The first planet gears 30 mesh with the first sun gear 28 and with the first ring gear 34.

[0034] The planetary gear set 26 comprises in the present case (in the second stage) a second sun gear 36, a plurality of second planet gears 38, a second planet carrier 40, and a second ring gear 42. The second sun gear 36 is coupled, in particular connected, to the first planet carrier 32 in a rotationally fixed manner. The second planet gears 38 are each rotatably mounted on the second planet carrier 40. The second ring gear 42 is designed to be rotationally fixed. The second ring gear 42 can be fixedly connected to the gear housing 62. The second planet gears 38 mesh with the second ring gear 42 and the second sun gear 36. The second planet carrier 40 is drivingly coupled to the differential gear 16. This is implemented in the present case by means of a third stage of the planetary gear set 26.

[0035] The planetary gear 26 comprises in the present case (in the third stage) a third sun gear 44, a plurality of third planet gears 46, a third planet carrier 48, and a third ring gear 50. The third sun gear 44 is coupled, in particular connected, to the second planet carrier 40 in a rotationally fixed manner. The third planet gears 46 are each rotatably mounted on the third planet carrier 48. The third planet carrier 48 is designed to be rotationally fixed. The third planet carrier 48 can be fixedly connected to the transmission housing 62. The third ring gear 50 is designed to be rotatably mounted. The third planet gears 46 mesh with the third ring gear 50 and with the third sun gear 44. The third ring gear 50 has an external toothing 52. The external toothing 52 of the third ring gear 50 meshes with the differential gear 16.

[0036] The drive arrangement 10 in the present case comprises a parking lock with a parking lock gear 58 for interrupting a torque transmission between the drive shaft 24 and the differential gear 16. The parking lock gear 58 is arranged in a rotationally fixed manner on the drive shaft 24.

[0037] In this case, the drive shaft 24, the first sun gear 28, the first planet carrier 32, the first ring gear 34, the second sun gear 36, the second planet carrier 40, the second ring gear 42, the third sun gear 44, the third planet carrier 48, the third ring gear 50, and the parking lock gear 58 are arranged coaxially with one another. The drive shaft 24 is oriented parallel to the rotational axis 20.

[0038] The drive assembly 10 in the present case comprises an axle housing 60. The differential 14, the differential gear 16 and the output shafts 18 are in the present case arranged at least partially within the axle housing 60.

[0039] Fig. Figure 2 shows a schematic representation of the drive arrangement 10 according to a second embodiment. The second embodiment differs from the first, in Fig. 1 shown, embodiment by the following: The planetary gear 26 is designed in two stages in this case. In particular, the first and second stages of the two exemplary embodiments are each identical. In the present case, the third stage of the planetary gear 26 according to the first exemplary embodiment is replaced by a gear chain. For this purpose, the planetary gear 26 comprises a first spur gear 54 and a second spur gear 56. The second planet carrier 40 is rotationally fixedly coupled, in particular connected, to the first spur gear 54. The second spur gear 56 meshes with the first spur gear 54 and the differential gear 16.

[0040] In this case, the drive shaft 24, the first sun gear 28, the first planet carrier 32, the first ring gear 34, the second sun gear 36, the second planet carrier 40, the second ring gear 42, the parking lock gear 58, and the first spur gear 54 are arranged coaxially with one another. The drive shaft 24 is oriented parallel to the rotational axis 20. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 2021 / 262 564 A1

[0003] US 2019 / 315 216 A1

[0003]

Claims

[1] Drive arrangement (10), in particular for a vehicle, comprising: - a banjo axle (12), wherein the banjo axle (12) comprises a differential (14) with a differential gear (16) and two output shafts (18) coupled to the differential (14), wherein the differential gear (16) is rotatable about an axis of rotation (20), wherein the output shafts (18) are arranged on opposite sides of the differential (14) and each along the axis of rotation (20), - an electric machine (22) with a drive shaft (24), - a planetary gear (26), wherein the drive shaft (24) and the differential gear (16) are drivingly coupled to one another by means of the planetary gear (26). [2] Drive arrangement (10) according to claim 1, characterized by that the planetary gear (26) is designed in at least two stages, in particular in three stages. [3] Drive arrangement (10) according to claim 1 or 2, characterized bythat the planetary gear (26) comprises: - a first sun gear (28) which is arranged in a rotationally fixed manner on the drive shaft (24), - several first planetary gears (30), - a first planet carrier (32) on which the first planet gears (30) are each rotatably mounted, - a first ring gear (34) which is designed to be non-rotatable, wherein the first planetary gears (30) mesh with the first ring gear (34) and the first sun gear (28), - a second sun gear (36) which is coupled, in particular connected, to the first planet carrier (32) in a rotationally fixed manner, - several second planetary gears (38), - a second planet carrier (40) on which the second planet gears (38) are each rotatably mounted, - a second ring gear (42) which is designed to be non-rotatable, wherein the second planet gears (38) mesh with the second ring gear (42) and the second sun gear (36), wherein the second planet carrier (40) is drivingly coupled to the differential gear (16). [4] Drive arrangement (10) according to claim 3, characterized by that the planetary gear (26) comprises: - a third sun gear (44) which is coupled, in particular connected, in a rotationally fixed manner to the second planet carrier (40), - several third planetary gears (46), - a third planet carrier (48) on which the third planet gears (46) are each rotatably mounted, wherein the third planet carrier (48) is designed to be non-rotatable, - a third ring gear (50) which is rotatably mounted, wherein the third planetary gears (46) mesh with the third ring gear (50) and the third sun gear (44), wherein the third ring gear (50) has an external toothing (52), wherein the external toothing (52) of the third ring gear (50) meshes with the differential gear (16). [5] Drive arrangement (10) according to claim 3, characterized by that the planetary gear (26) comprises: - a first spur gear (54), wherein the second planet carrier (40) is non-rotatably coupled, in particular connected, to the first spur gear (54), - a second spur gear (56), wherein the second spur gear (56) meshes with the first spur gear (54) and the differential gear (16). [6] Drive arrangement (10) according to one of the preceding claims, characterized bythat the drive arrangement (10) comprises a parking lock with a parking lock gear (58) for interrupting a torque transmission between the drive shaft (24) and the differential gear (16), wherein the parking lock gear (58) is arranged in a rotationally fixed manner on the drive shaft (24). [7] Drive arrangement (10) according to one of claims 3 to 6, characterized by that the drive shaft (24), the first sun gear (28), the first planet carrier (32), the first ring gear (34), the second sun gear (36), the second planet carrier (40), the second ring gear (42), the third sun gear (44), the third planet carrier (48), the third ring gear (50), the first spur gear (54) and / or the parking lock gear (58) are arranged coaxially to one another, in particular wherein the drive shaft (24) is oriented parallel to the axis of rotation (20). [8] Drive arrangement (10) according to one of the preceding claims, characterized bythat the drive arrangement (10) comprises an axle housing (60), wherein the differential (14), the differential gear (16) and / or the output shafts (18) are arranged at least partially within the axle housing (60). [9] Drive arrangement (10) according to one of the preceding claims, characterized by that the drive arrangement (10) comprises a gear housing (62), wherein the planetary gear (26) and / or the electric machine (22) are arranged at least partially within the gear housing (62). [10] Vehicle, in particular motor vehicle, comprising at least one drive arrangement (10) according to one of the preceding claims.

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