SHAFT ARRANGEMENT, DRIVE ARRANGEMENT AND VEHICLE

Description

State of the art

[0001] The invention relates to a shaft arrangement with features of claim 1, a drive arrangement with features of claim 8 and a vehicle with features of claim 10.

[0002] In gearboxes, loose gears are used, which can be coupled to or detached from a shaft. These loose gears typically have helical teeth. When coupled, they are forced or moved axially in one direction or the other, depending on the load direction (push or tension). Support discs are used to support or absorb the axial forces acting upon them.

[0003] The support discs are typically installed with axial and radial play. A disadvantage of this is that when the support discs are unloaded during decoupled operation (towing / thrusting), they can vibrate and cause unwanted noise. Alternatively, the support discs can be pressed onto the shaft. However, this is very expensive due to tight tolerances and the complex assembly / disassembly process.

[0004] From DE 10 2021 208 600 A1, a shaft arrangement for a drive arrangement is known, wherein the shaft arrangement comprises a shaft, a loose gear, a coupling element and a clutch element, wherein the coupling element is rotationally fixed to the loose gear, wherein the clutch element is rotationally fixed to the shaft and is movable along an axial direction between a coupled position and a decoupled position, wherein in the coupled position the loose gear is rotationally fixed to the shaft, and wherein in the decoupled position the loose gear is freely rotatable on the shaft.

[0005] From DE 10 2014 213 924 A1, a bearing device for a clutch system of a motor vehicle is known, wherein the bearing device is provided with a transmission input shaft and a pressure plate, wherein the pressure plate is mounted on the transmission input shaft by means of a bearing element, wherein a locking element is provided to secure the bearing element on the transmission input shaft, and wherein a damping element is arranged between the bearing element and the locking element. Disclosure of the invention

[0006] According to the invention, a shaft arrangement, particularly for a drive arrangement, is proposed. The shaft arrangement comprises a shaft, a freewheel, and a coupling element. The coupling element is rotationally fixed to the freewheel. The coupling element can be arranged rotationally fixed on the freewheel. The shaft arrangement further comprises a clutch element. The clutch element is rotationally fixed to the shaft and movable along an axial direction between a coupled position and a decoupled position. In the coupled position, the freewheel is rotationally fixed to the shaft. In the decoupled position, the freewheel is freely rotatable on the shaft (or decoupled from the shaft). The shaft arrangement further comprises a support disk for axially supporting the freewheel (or for absorbing axial forces). The support disk is arranged axially adjacent to the freewheel on the shaft. The support disk has an elastic damping element.The damping element can be made of or comprise an elastic material. The elastic material can be rubber and / or an elastomer. The support disc can have an elastic damping element, at least in sections. The support disc can be at least partially elastic. The damping element is arranged on a radial inner surface (or the inner circumference) of the support disc. The damping element can be attached to the radial inner surface (or the inner circumference) of the support disc, for example, by adhesive bonding. The support disc can be elastic on its radial inner surface (or the inner circumference). The inner diameter of the support disc and / or the damping element can be smaller than the outer diameter of the shaft at the mounting location of the damping element when unloaded.

[0007] This design advantageously prevents or at least reduces vibration of the support disc and the associated unwanted noise. Furthermore, the support disc can be easily installed and removed, eliminating the need for additional effort during assembly or disassembly. Manual installation of the support disc is possible; pressing the support disc onto the shaft is unnecessary. This allows for the simple and cost-effective provision of a support disc to absorb the axial forces of a loose gear. Furthermore, simple manual installation of the support disc is possible. Vibration of the support disc, caused in particular by vibrations transmitted to the support disc via the shaft, and the associated unwanted noise, can be prevented or at least reduced.

[0008] In this context, "axial" or "axial direction" refers to a direction aligned along or parallel to the central longitudinal axis of the shaft. In other words, the central longitudinal axis of the shaft is oriented along the axial direction. Similarly, "radial" or "radial direction" refers to a direction perpendicular to and radiating from the central longitudinal axis of the shaft.

[0009] According to further training, the damping element can be designed as a rubber coating. The support disc can also have a rubber coating.

[0010] This allows the damping element or a partially elastic support disc to be implemented using simple means.

[0011] According to a further development, the shaft assembly can include a retaining ring. The retaining ring can engage in a groove arranged on the shaft. The retaining ring can be designed to axially secure the support disc. The retaining ring can be arranged on a side of the support disc facing away from the loose gear.

[0012] This allows the support disc to be axially secured using simple means.

[0013] According to a further development, the shaft assembly can have a guide hub. The guide hub can be rotationally fixed to the shaft. The guide hub can be arranged on the shaft. The coupling element can be rotationally fixed to the shaft by means of the guide hub.

[0014] This allows for a secure, rotationally fixed coupling of the coupling element, and thus of the loose wheel, to the shaft using simple means.

[0015] According to a further development, the shaft assembly can include a gear. The gear can be a fixed gear. The gear can be rotationally fixed to the shaft. The gear can be mounted on the shaft. The gear can be configured to couple the shaft. The gear can serve to transmit torque via the shaft.

[0016] This allows for the coupling of the shaft for torque transmission using simple means.

[0017] According to further training, the guide hub and / or the gear can be formed in one piece (or as a single unit) with the shaft.

[0018] This allows for the creation of a robust shaft assembly. Furthermore, the manufacturing of such a shaft assembly can be simplified. Additionally, the number of components and thus the complexity of the shaft assembly can be reduced.

[0019] According to the invention, a drive arrangement for a vehicle, in particular a motor vehicle, with a shaft arrangement as described above is proposed. Regarding the advantages achievable thereby, reference is made to the corresponding descriptions of the shaft arrangement. The measures described in connection with the shaft arrangement and / or those explained below can be used for further development of the drive arrangement.

[0020] According to a further development, the drive arrangement can include a drive shaft. The drive shaft can be coupled (non-rotatably) to the shaft or to the axle. The axle can be an intermediate shaft of the drive arrangement. The drive arrangement can include a differential with a differential gear. The differential gear can be coupled (non-rotatably) to the shaft, in particular by means of the loose gear. The drive arrangement can include at least one output shaft. The output shaft can be coupled (non-rotatably) to the differential, in particular to the differential gear. The drive arrangement can also include an electric machine. The drive shaft can be driven by the electric machine. The drive arrangement can, for example, be designed as an e-axle or form part of an e-axle.

[0021] This allows for the implementation of a robust drive arrangement using simple means.

[0022] According to the invention, a vehicle, in particular a motor vehicle, with a drive arrangement as described above is proposed. Regarding the advantages achievable thereby, reference is made to the corresponding descriptions of the drive arrangement. The measures described in connection with the drive arrangement and / or those explained below can be used for further development of the vehicle.

[0023] The following are an explanation of embodiments of the invention with reference to the accompanying drawings. These schematically show: Figure 1 shows a representation of a drive arrangement with a shaft arrangement; Figure 2 shows a perspective view of the shaft arrangement according to Figure 1 Figure 3 shows a sectional view of the shaft arrangement according to Figure 2 ; and Figure 4, an enlarged view of a section from Figure 3 .

[0024] The drive arrangement contributes to Figure 1The entire assembly is designated by reference numeral 12. The drive assembly 12 is configured as an e-axle. The drive assembly 12 can be configured to drive a vehicle, in particular a motor vehicle. The drive assembly 12 comprises an electric machine 11 with a drive shaft 38 and a drive gear 39 (or drive pinion). The drive assembly 12 also includes a shaft assembly 10, comprising a shaft 14, a loose gear 16, and a gear 36. In this case, the shaft 14 is an intermediate shaft of the drive assembly 12.

[0025] In this case, the drive gear 39 is rotationally fixed to the drive shaft 38, and in particular is arranged on the drive shaft 38. The gear 36 is rotationally fixed to the shaft 14, and in particular is arranged on the shaft 14. The drive gear 39 and the gear 36 mesh with each other. The shaft 14 is thus drivenly coupled to the drive shaft 38. In other words, the shaft 14 can be driven by means of the drive shaft 38.

[0026] The loose gear 16 can be coupled to the shaft 14 in a rotationally fixed state. In a decoupled state, the loose gear can rotate freely on the shaft 14 (be decoupled from the shaft 14). For this purpose, the loose gear 16 is rotatably mounted on the shaft 14 by means of rolling bearings, e.g., needle bearings.

[0027] The drive arrangement 12 comprises a differential 40 with a differential gear 42. The differential gear 42 or the differential 40 can be coupled to the shaft 14 via the loose gear 16. The drive arrangement 12 has two output shafts 44 which can be coupled to the differential 40, in particular to the differential gear 42, in a rotationally fixed manner.

[0028] Figure 2 shows a perspective view of the wave arrangement 10 according to Figure 1The shaft assembly 10 comprises a coupling element 18. The coupling element 18 is rotationally fixed to the loose gear 16. In this case, the coupling element 18 is arranged on the loose gear 16. The shaft assembly 10 further comprises a coupling element 20. The coupling element 20 is rotationally fixed to the shaft 14. The coupling element 20 is movable along an axial direction 22 between a coupled position and a decoupled position. In the coupled position of the coupling element 20, the loose gear 16 is rotationally fixed to the shaft 14. In the decoupled position of the coupling element 20, the loose gear 16 is freely rotatable on the shaft 14.

[0029] The shaft assembly 10 includes a support disc 24 for axially supporting the loose gear 16. In other words, the support disc 24 is designed to absorb axial forces. The support disc 24 is arranged axially adjacent to the loose gear 16 on the shaft 14.

[0030] Figure 3shows a sectional view of the wave arrangement 10 according to Figure 2 The shaft assembly 10 includes a guide hub 34. The guide hub 34 is rotationally fixed to the shaft 14. In this case, the guide hub 34 is arranged on the shaft 14. The coupling element 20 is rotationally fixed to the shaft 14 by means of the guide hub 34.

[0031] The guide hub 34 has external teeth (not shown) and the coupling element 20 has internal teeth (not shown). The coupling element 20 is fixedly mounted on the guide hub 34, with the internal teeth of the coupling element 20 and the external teeth of the guide hub 34 engaging with each other. The coupling element 18 has external teeth (not shown). In the coupled configuration, in Figure 3In the depicted position of the coupling element 20, the internal teeth of the coupling element 20 and the external teeth of the coupling element 18 are in engagement with each other. When the coupling element 20 is in Figure 3 When moved to the right, along the axial direction 22, into the decoupled position, the internal teeth of the coupling element 20 and the external teeth of the coupling element 18 are no longer engaged with each other.

[0032] In this case, the shaft 14, the guide hub 34, and the gear 36 are formed as a single piece. It is also conceivable that the shaft 14, the guide hub 34, and the gear 36 could each be formed as separate components.

[0033] Figure 4 shows an enlarged view of a section from Figure 3 The one in Figure 4 enlarged section, is in Figure 3The support disc 24 is marked by a dashed outline. According to the invention, the support disc 24 has an elastic damping element 25. It is also conceivable that the support disc 24 is at least partially elastic.

[0034] According to the invention, the damping element 25 is arranged on a radial inner surface 26 of the support disc 24. In this case, the damping element 25 is designed as a rubber coating 28. It is also conceivable that the support disc 24 could be elastic on its radial inner surface 26. The support disc 24 can have a rubber coating 28 on its radial inner surface 26.

[0035] The shaft assembly 10 includes a retaining ring 30. A groove 32 is formed on the shaft 14, into which the retaining ring 30 engages. The retaining ring 30 axially secures the support disc 24. The retaining ring 30 is arranged on a side of the support disc 24 facing away from the loose gear 16.

Claims

1. Shaft arrangement (10), in particular for a drive arrangement (12), the shaft arrangement (10) comprising: - a shaft (14), - an idler gear (16), - a coupling element (18), wherein the coupling element (18) is coupled rotationally conjointly to the idler gear (16), in particular is arranged rotationally conjointly on the idler gear (16), - a clutch element (20), wherein the clutch element (20) is coupled rotationally conjointly to the shaft (14) and is movable along an axial direction (22) between a coupled position and a decoupled position, wherein the idler gear (16) is coupled rotationally conjointly to the shaft (14) in the coupled position, wherein the idler gear (16) is freely rotatable on the shaft (14) in the decoupled position, characterized by - a supporting disc (24) for axially supporting the idler gear (16), wherein the supporting disc (24) is arranged on the shaft (14) axially adjacent to the idler gear (16), - wherein the supporting disc (24) has an elastic damping element (25), - and wherein the damping element (25) is arranged on a radial inner side (26) of the supporting disc (24).

2. Shaft arrangement (10) according to the preceding claim, characterized in that the damping element (25) is in the form of a rubber coating (28).

3. Shaft arrangement (10) according to either of the preceding claims, characterized in that the shaft arrangement (10) comprises a securing ring (30) which engages into a groove (32) in the shaft (14) so as to axially secure the supporting disc (24).

4. Shaft arrangement (10) according to one of the preceding claims, characterized in that the shaft arrangement (10) has a guide hub (34), wherein the guide hub (34) is coupled rotationally conjointly to the shaft (14), in particular is arranged on the shaft (14), wherein the clutch element (20) is coupled rotationally conjointly to the shaft (14) by means of the guide hub (34).

5. Shaft arrangement (10) according to one of the preceding claims, characterized in that the shaft arrangement (10) comprises a gearwheel (36), wherein the gearwheel (36) is coupled rotationally conjointly to the shaft (14), in particular is arranged on the shaft (14).

6. Shaft arrangement (10) according to Claim 4 and / or 5, characterized in that the guide hub (34) and / or the gearwheel (36) are / is formed in one piece with the shaft (14).

7. Drive arrangement (12) for a vehicle, in particular a motor vehicle, having a shaft arrangement (10) according to one of the preceding claims.

8. Drive arrangement (12) according to Claim 7, characterized in that the shaft (14) is an intermediate shaft and the drive arrangement (12) comprises: - a drive shaft (38), wherein the drive shaft (38) is couplable or coupled to the shaft (14), - a differential (40) with a differential gear (42), wherein the differential gear (42) is couplable or coupled to the shaft (14), in particular by means of the idler gear (16), - in particular at least one output shaft (44), wherein the output shaft (44) is couplable or coupled to the differential (40), in particular to the differential gear (42).

9. Vehicle, in particular a motor vehicle, having a drive arrangement (12) according to either of the two preceding claims.