Wheel hub gear for a utility vehicle

Abstract

The invention relates to a wheel hub gear (1) for a wheel hub (3) of a utility vehicle, having: - a first planetary gear set (5.1) which has a first sun gear (11.1) and first planetary gears (13.1), the first sun gear (11.1) and the first planetary gears (13.1) meshing with one another; - a second planetary gear set (5.2) which has a second sun gear (11.2) and second planetary gears (13.2), the second sun gear (11.2) and the second planetary gears (13.2) meshing with one another; - a planet carrier (7) which has the first planetary gears (13.1) and the second planetary gears (13.2), the first planetary gears (13.1) and the second planetary gears (13.2) meshing with one another, and - a ring gear (9) which engages around the second planetary gear set (5.2), the ring gear (9) meshing with the second planetary gears (13.2), the first sun gear (11.1) being designed and configured as a drive element (15), which has a central axis (17), in order to be drivingly connected to a drive of the utility vehicle, - the ring gear (9) is designed and configured as an output element (19) in order to be drivingly connected to a drive gear of the utility vehicle, and - the drive element (15) is designed and configured as a shift element (16) in order to selectively shift the wheel hub gear (1) to a first gear, a second gear, and a third gear. The invention also relates to a utility vehicle having such a wheel hub gear (1).

Description

[0001] 2023P00708WG

[0002] Daimler Truck AG 1 Furkan Özvatan

[0003] August 26, 2025

[0004] Wheel hub gears and commercial vehicles

[0005] The invention relates to a wheel hub gear for a wheel hub of a commercial vehicle and a commercial vehicle with such a wheel hub gear.

[0006] Commercial vehicles, especially electrically powered commercial vehicles, can have a planetary gear set in the wheel hubs, also known as a wheel hub gear set. Such a wheel hub gear set typically includes a sun gear, planet gears, a planet carrier, and a ring gear. A drive element is usually connected to the sun gear, allowing a drive torque, particularly an electric motor, to be transmitted to the sun gear. Furthermore, a driven element is connected to the planet carrier, enabling the vehicle's wheel to be driven. Wheel hub gear sets can be switchable, allowing the gear ratio to be changed, particularly to improve efficiency at higher speeds.The wheel hub drive typically features a first gear for relatively low speeds, especially for starting off, and a second gear for relatively high speeds, particularly for highways and freeways. In such designs, the difference in the gear ratio between first and second gear is usually too large, preventing optimal gear ratios from being achieved. Therefore, the central drive of the commercial vehicle must possess sufficient mechanical strength to transmit the relatively high drive torques, especially those of the electric drive. Consequently, the central drive is designed to be relatively robust and requires a considerable amount of installation space.

[0007] The invention is therefore based on the objective of creating a wheel hub gear for a wheel hub of a commercial vehicle and a commercial vehicle with such a wheel hub gear, wherein the aforementioned disadvantages are reduced, preferably do not occur.

[0008] The problem is solved by providing the present technical teaching, in particular the teaching of the independent claims and the preferred embodiments disclosed in the dependent claims and the description. 2023P00708WG

[0009] Daimler Truck AG 2 Furkan Özvatan

[0010] August 26, 2025

[0011] The problem is solved, in particular, by providing a wheel hub gear for a wheel hub of a commercial vehicle, especially one driven electrically. The wheel hub gear comprises a first planetary gear set, a second planetary gear set, a planet carrier, and a ring gear. The first planetary gear set comprises a first sun gear and first planet gears, wherein the first sun gear and the first planet gears mesh. The second planetary gear set comprises a second sun gear and second planet gears, wherein the second sun gear and the second planet gears mesh. The planet carrier comprises the first planet gears and the second planet gears and, in particular, mounts them so that they can rotate, wherein the first planet gears and the second planet gears mesh. The ring gear engages the second planetary gear set, and in particular the first planetary gear set, wherein the ring gear meshes with the second planet gears.The first sun gear is designed and configured as a drive element with a central shaft to be driven by a drive system, particularly an electric one, of the commercial vehicle, especially for propelling the vehicle. The ring gear is designed and configured as an output element to be driven by a drive wheel of the commercial vehicle, especially for propelling the vehicle. The drive element is designed and configured as a shifting element to selectively shift the wheel hub gear into a first gear, a second gear, and a third gear, especially to change the gear ratio of the wheel hub gear.

[0012] The advantage of the three-gear wheel hub drive is its better gear ratio spacing compared to a two-gear wheel hub drive. In particular, the difference between the respective gear ratios is reduced. Because the different gear ratios allow for a comparatively high output torque at the output element, especially for the drive wheel, it is conversely no longer necessary to introduce a correspondingly high input torque into the wheel hub drive. Due to the increased difference between the gear with the highest and lowest gear ratios, a lower input torque can result in the same output torque at the output element as with a two-gear wheel hub drive.Therefore, the central drive can advantageously have lower strength and, in particular due to its smaller design, requires less installation space.

[0013] In particular, the wheel hub drive is designed and configured to be arranged, and especially installed, in a wheel hub of an electrically powered commercial vehicle. 2023P00708WG

[0014] Daimler Truck AG 3 Furkan Özvatan

[0015] August 26, 2025

[0016] In one embodiment, the wheel hub gear is designed as a particularly double planetary gear, in particular as a so-called Ravigneaux planetary gear.

[0017] In one embodiment, a gear element, selected from the first sun gear, the second sun gear, the planet carrier and the ring gear, - in particular all the gear elements listed - is arranged concentrically to the central axis.

[0018] In particular, the first planet gears – especially when viewed radially with respect to the central axis – are arranged closer to the central axis than the second planet gears. Specifically, planet gears selected from the first planet gears and the second planet gears are spaced apart from one another in a circumferential direction encompassing the central axis.

[0019] In one embodiment, the second planet gears, in particular the second planet gear axes of the second planet gears, are arranged radially aligned with the first planet gears, in particular with the first planet gear axes of the first planet gears, with respect to the central axis. In particular, each first planet gear meshes with a second planet gear. In another embodiment, the second planet gears are arranged partially between the first planet gears when viewed circumferentially. In particular, the second planet gears are located—in particular spaced apart circumferentially—on a second circumferential circle oriented concentrically to the central axis, wherein the first planet gears—in particular spaced apart circumferentially—are located on a first circumferential circle oriented concentrically to the central axis, the second circumferential circle having a larger diameter than the first circumferential circle.In particular, a second planet gear then meshes with the two first planet gears, between which the second planet gear is arranged in sections.

[0020] According to a further development of the invention, the planet carrier and the second sun gear are fixedly mounted on the drive element along the central axis and rotatably mounted on the drive element about the central axis. The drive element is arranged and configured to be displaced along the central axis for gear changes, wherein, in particular, due to the displacement of the drive element along the central axis, the planet carrier and the second sun gear, and especially the first sun gear, the first planet gears, and the second planet gears, are also displaced along the central axis for gear changes. 2023P00708WG

[0021] Daimler Truck AG 4 Furkan Özvatan

[0022] August 26, 2025

[0023] The wheel hub gear offers the advantage of particularly simple shifting, achieved solely by moving the drive element along the central axis. No additional control of other moving gear elements is necessary. Thus, the entire wheel hub gear can be controlled using only the first sun gear, which serves as the drive element: A drive torque is introduced into the wheel hub gear by rotating the drive element around the central axis, and the three gears can be shifted by moving the drive element along the central axis.

[0024] In the context of the present technical teaching, the fact that the planet carrier and the second sun gear are fixedly mounted on the drive element along the central axis means in particular that the planet carrier and the second sun gear are mounted on the drive element along the central axis in such a way that the planet carrier and the second sun gear, as well as in particular the first sun gear, the first planet gears and the second planet gears, are also moved along the central axis by the displacement of the drive element along the central axis, especially for gear changes.

[0025] According to a further development of the invention, the wheel hub transmission has a shift insert comprising the first sun gear, the second sun gear, the first planet gears, the second planet gears, and the planet carrier. The shift insert is designed and configured to be displaced by means of the drive element along the central axis, particularly relative to the ring gear and relative to a stationary axle carrier element – ​​neither of which belong to the shift insert – in order to selectively shift the wheel hub transmission into first gear, second gear, and third gear.

[0026] The shift insert thus advantageously incorporates those transmission elements that must be moved along the central axis to shift gears. These are arranged compactly as a movable assembly within the ring gear.

[0027] In one embodiment, the drive element comprises a first axial bearing surface, a second axial bearing surface (particularly located opposite the central axis), a first axial bearing device, and a second axial bearing device (particularly located opposite the central axis). Specifically, the first axial bearing device supports the planet carrier along the central axis on the first axial bearing surface of the drive element, and supports the planet carrier, particularly along the central axis, on the first axial bearing surface of the drive element. Specifically, the second axial bearing device supports the second sun gear along the central axis on the second axial bearing surface of the drive element. 2023P00708WG

[0028] Daimler Truck AG 5 Furkan Özvatan

[0029] 26.08.2025 the second sun gear is separated, in particular along the central axis, from the second axial bearing surface of the drive element. In particular, the drive element has a third axial bearing device, which is arranged, in particular along the central axis, between the planet carrier and the second sun gear and supports the planet carrier on the second sun gear. In particular, the second axial bearing surface is formed by means of a bearing surface ring, which is designed and configured to be slid onto the drive element. In particular, the bearing surface ring is secured on the drive element, in particular along the central axis, by means of a retaining ring.

[0030] According to a further development of the invention, the wheel hub drive is designed and configured such that in the first gear, the planet carrier is locked to the stationary axle carrier element, and that, in particular, a drive torque can be introduced from the drive element via the first sun gear, via the first planet gears, via the second planet gears – especially in this sequence with respect to a drive torque path – into the ring gear. In particular, in the first gear, the planet carrier cannot rotate about the central axis, while the second sun gear, especially when set in rotation by the second planet gears, can rotate freely.

[0031] Alternatively or additionally, the wheel hub drive is designed and configured such that, in second gear, the second sun gear is locked to the stationary axle carrier element, and that, in particular, a drive torque can be introduced from the drive element via the first sun gear, via the first planet gears, via the second planet gears – specifically in this sequence with respect to a drive torque path – into the ring gear. In particular, in second gear, the second sun gear can no longer rotate about the central axis, with the planet carrier being decoupled from the stationary axle carrier element. Specifically, the second planet gears can roll on the locked second sun gear and, in particular, thereby introduce the drive torque into the ring gear.

[0032] Alternatively or additionally, the wheel hub drive is designed and configured such that in third gear the drive element is locked to the ring gear and that, in particular, a drive torque can be introduced directly from the drive element into the ring gear. Specifically, in third gear the planet carrier and the second sun gear are decoupled from the stationary axle carrier element. 2023P00708WÖ

[0033] Daimler Truck AG 6 Furkan Özvatan

[0034] August 26, 2025

[0035] According to a further development of the invention, the switching element is designed and configured to selectively switch the wheel hub drive into a first neutral position and a second neutral position. In particular, in the first neutral position and / or the second neutral position, neither the planet carrier nor the second sun gear is locked to the stationary axle carrier element. Specifically, the drive element is also not locked to the ring gear. The first neutral position is located between first and second gear with respect to the switching element's travel. Alternatively or additionally, the second neutral position is located between second and third gear with respect to the switching element's travel.In particular, in the first neutral position and / or the second neutral position, any drive torque introduced into the wheel hub gear via the drive element is not introduced into the ring gear, so that, in particular, no drive of the drive wheel, especially of the commercial vehicle, takes place. Specifically, the planet carrier – with the gear elements arranged on it – can rotate freely within the ring gear. Specifically, the shift insert can rotate freely within the ring gear.

[0036] According to a further development of the invention, the ring gear is designed as a wheel hub housing hub, in particular a bell hub. Advantageously, no additional output element is necessary, since the ring gear itself drives the drive wheel.

[0037] Alternatively or additionally, the ring gear is provided to have a flange surface designed and configured so that a drive wheel of the commercial vehicle can be mounted to it. In particular, wheel bolts for the drive wheel pass through the flange surface.

[0038] Alternatively or additionally, the ring gear is provided to have an opening at its end face – particularly when installed as intended in a commercial vehicle, with the opening facing away from the commercial vehicle. The ring gear has a first fastening element, in particular a first thread, especially an internal thread, wherein a ring gear locking element has a second fastening element, in particular a second thread, especially an external thread.The first fastening element and the second fastening element are designed and interact in such a way that the ring gear locking element can be attached to the ring gear, in particular inserted into the ring gear, in particular screwed in, and removed from the ring gear, in particular taken out, in particular unscrewed, so that in the attached, in particular inserted, in particular screwed-in state, the end face opening is closed by means of the ring gear locking element and in the removed, in particular taken out, in particular unscrewed state, the 2023P00708WÖ.

[0039] Daimler Truck AG 7 Furkan Özvatan

[0040] The front opening is released on August 26, 2025, and is accessible, in particular for assembly and / or maintenance.

[0041] Advantageously, due to the first fastening element and the second fastening element, it is possible to dispense with the previously common screwing of the ring gear locking element to the ring gear by means of a plurality of screws arranged in a ring around the central axis, thereby also eliminating the previously necessary installation space for the threads and the material surrounding the thread.

[0042] In one embodiment, a sealing element, in particular a sealing ring, in particular an O-ring, is arranged between the ring gear and the ring gear closure element, which in particular seals an interior of the ring gear, in which in particular the wheel hub gear is arranged, against an external environment.

[0043] In one embodiment, the ring gear locking element has assembly tool recesses, in particular assembly tool pockets, which are designed and arranged in such a way that an assembly tool can engage in the assembly tool recesses and rotate the ring gear locking element, in particular screw it into the ring gear and unscrew it from the ring gear.

[0044] According to a further development of the invention, the drive element has a first end and a second end, which is located opposite the central axis. Extending from the second end, and particularly towards the first end, the drive element has a sun gear bearing for the second sun gear, the first sun gear, and a ring gear locking element. The sun gear bearing is designed and configured to mount the second sun gear rigidly along the central axis and to allow it to rotate about the central axis. The ring gear locking element is designed and configured to engage with a mating ring gear locking element of the ring gear in a gear selected from the first, second, and third gears, particularly in the third gear, and, in particular during engagement, to lock the ring gear to the drive element.

[0045] Alternatively or additionally, it is provided that the second sun gear has a first end and a second end, in particular opposite along the central axis. Extending from the second end, in particular towards the first end, the second sun gear has a first axle carrier element locking element and a second sun gear toothing, wherein the first axle carrier element locking element is designed and configured to engage in a first counter-axle carrier element locking element 2023P00708WG in a gear selected from the first gear, the second gear and the third gear, in particular in the second gear.

[0046] Daimler Truck AG 8 Furkan Özvatan

[0047] 26.08.2025 to intervene in the stationary axle carrier element and, in particular during the intervention, to block the second sun gear with the axle carrier element.

[0048] Alternatively or additionally, the planet carrier is provided to have a first end and a second end, located opposite it, particularly along the central axis. Extending from the second end, and particularly towards the first end, the planet carrier has a second axle carrier element locking element and planet gears selected from the first and second planet gears. The second axle carrier element locking element is designed and configured to engage, in a gear selected from first, second, and third gear, particularly first gear, with a second counter-axle carrier element locking element of the stationary axle carrier element and, particularly during engagement, to lock the planet carrier to the axle carrier element.

[0049] Alternatively or additionally, the ring gear is provided to have a first end and a second end opposite it along the central axis. Extending from the second end, and particularly towards the first end, the ring gear has planetary gear teeth, especially for the second planet gears, and the mating ring gear locking element.

[0050] Alternatively or additionally, it is provided that the stationary axle carrier element comprises the first counter-axle carrier element locking element and the second counter-axle carrier element locking element, which are arranged at different axial heights, particularly along the central axis. The first counter-axle carrier element locking element points towards the central axis, particularly with respect to the central axis. The second counter-axle carrier element locking element points away from the central axis, particularly with respect to the central axis.

[0051] The problem is also solved by creating a commercial vehicle that has a wheel hub drive according to the invention or a wheel hub drive according to one or more of the previously described embodiments and, in particular, an electric drive. The electric drive is operatively connected to a drive element of the wheel hub drive and configured to introduce a drive torque into the drive element, in particular for propelling the commercial vehicle. In connection with the commercial vehicle, the advantages that have already been explained in connection with the wheel hub drive become particularly apparent.

[0052] According to a further development of the invention, the commercial vehicle is provided to have an axle support element, in particular an axle bridge, especially a rear axle bridge. 2023P00708WG

[0053] Daimler Truck AG 9 Furkan Özvatan

[0054] August 26, 2025

[0055] The axle carrier element has a counter-axle carrier element blocking element, selected from the first counter-axle carrier element blocking element and the second counter-axle carrier element blocking element, in particular both counter-axle carrier element blocking elements. This represents a particularly simple way to block a gear element, selected from the second sun gear and the planet carrier, of the wheel hub gear.

[0056] According to a further development of the invention, the axle carrier element has a through-opening, with the drive element passing through this opening. A counter-axle carrier element locking element, selected from the first counter-axle carrier element locking element and the second counter-axle carrier element locking element, in particular both counter-axle carrier element locking elements, surrounds the through-opening and is in particular arranged concentrically to the through-opening.

[0057] In one embodiment, the commercial vehicle has a displacement actuator that is designed and configured to displace the drive element along the central axis.

[0058] The invention will be explained in more detail below with reference to the drawing. The drawing shows:

[0059] Fig. 1 shows a schematic representation of a first embodiment of a wheel hub drive,

[0060] Fig. 2 is a schematic representation of the wheel hub gear of Figure 1, shifted into first gear,

[0061] Fig. 3 is a schematic representation of the wheel hub gear of Figure 1, shifted into a second gear, and

[0062] Fig. 4 is a schematic representation of the wheel hub gear of Figure 1, shifted into a third gear,

[0063] Figure 1 shows a schematic representation of a first embodiment of a wheel hub drive 1 for a wheel hub 3 of a commercial vehicle (not shown), in particular an electrically driven one, in a sectional view.

[0064] The wheel hub gear 1 comprises a first planetary gear set 5.1, a second planetary gear set 5.2, a planet carrier 7, and a ring gear 9. The first planetary gear set 5.1 comprises a first sun gear 11.1 and first planet gears 13.1, the first sun gear 11.1 and the first planet gears 13.1 meshing. The second planetary gear set 5.2 comprises a second sun gear 2023P00708WG

[0065] Daimler Truck AG 10 Furkan Özvatan

[0066] August 26, 2025

[0067] The first sun gear 11.2 and the second planet gears 13.2 mesh. The planet carrier 7 has the first planet gears 13.1 and the second planet gears 13.2, and is mounted in a rotatable manner, with the first planet gears 13.1 and the second planet gears 13.2 meshing. The ring gear 9 engages the second planet gear set 5.2, and in particular the first planet gear set 5.1, with the ring gear 9 meshing with the second planet gears 13.2. The first sun gear 11.1 is designed and configured as a drive element 15, which has a central shaft 17 shown in dashed lines, to be connected to a drive element (not shown), and in particular an electric drive, of the commercial vehicle, especially for propelling the commercial vehicle.The ring gear 9 is designed and configured as an output element 19 to be driven by a drive wheel (not shown) of the commercial vehicle, in particular for propelling the commercial vehicle. The drive element 15 is designed and configured as a shifting element 16 to selectively shift the wheel hub gear 1 into a first gear, a second gear, and a third gear, in particular to change the gear ratio of the wheel hub gear 1.

[0068] The planet carrier 7 and the second sun gear 11.2 are fixedly mounted on the drive element 15 along the central axis 17 and rotatably mounted on the drive element 15 about the central axis 17. The drive element 15 is arranged and configured to be displaced along the central axis 17 – represented by a first arrow 21 – for a gear change, whereby, due to the displacement of the drive element 15 along the central axis 17, the planet carrier 7 and the second sun gear 11.2, and in particular the first sun gear 11.1, the first planet gears 13.1 and the second planet gears 13.2, are also displaced along the central axis 17 for the gear change.

[0069] The wheel hub gear 1 has a shift insert 23, shown with dashed lines, which includes the first sun gear 11.1, the second sun gear 11.2, the first planet gears 13.1, the second planet gears 13.2, and the planet carrier 7. The shift insert 23 is designed and configured to be displaced by means of the drive element 15 along the central axis 17, in particular relative to the ring gear 9 and relative to a stationary axle carrier element 25 – neither of which belong to the shift insert 23 – in order to selectably shift the wheel hub gear 1 into first gear, second gear, and third gear.

[0070] The ring gear 9 is designed here as a wheel hub housing hub, in particular a bell hub. 2023P00708WÖ

[0071] Daimler Truck AG 11 Furkan Özvatan

[0072] August 26, 2025

[0073] The ring gear 9 has a flange surface 27 which is designed and configured so that a drive wheel (not shown) of the commercial vehicle can be mounted on it. In particular, wheel bolts 29 for the drive wheel extend through the flange surface 27.

[0074] The ring gear 9 has an end face opening 31, which, particularly when installed as intended in a commercial vehicle, points away from the commercial vehicle. The ring gear 9 has a first fastening element 33.1, in particular a first thread, especially an internal thread, wherein a ring gear locking element 35 has a second fastening element 33.2, in particular a second thread, especially an external thread. The first fastening element 33.1 and the second fastening element 33.22 are designed and interact in such a way that the ring gear locking element 35 can be attached to the ring gear 9, in particular inserted into the ring gear 9, in particular screwed in, and removed from the ring gear 9, in particular taken out, in particular unscrewed, so that in the attached, in particular inserted, in particular screwed-in state, the end face opening 31 is closed by means of the ring gear locking element 35 and in the removed, in particular taken out, in particular unscrewed state, the end face opening 31 is released, in particular accessible for assembly and / or maintenance.

[0075] A sealing element 37, in particular a sealing ring, in particular an O-ring, is arranged between the ring gear 9 and the ring gear locking element 35, which in particular seals a ring gear interior 39, in which in particular the wheel hub gear 1 is arranged, against an external environment 41.

[0076] The ring gear locking element 35 has assembly tool recesses 43, in particular assembly tool pockets, which are designed and arranged in such a way that an assembly tool can engage in the assembly tool recesses 43 and rotate the ring gear locking element 35, in particular screw it into the ring gear 9 and unscrew it from the ring gear 9.

[0077] When the wheel hub drive 1 is installed in a commercial vehicle as intended, the drive, in particular an electric drive, is operatively connected to the drive element 15 and configured to introduce a drive torque into the drive element 15, in particular for propelling the commercial vehicle. The commercial vehicle may have the axle carrier element 25, in particular an axle bridge, in particular a rear axle bridge. The axle carrier element 25 has a counter-axle carrier element locking element 45, selected from a first counter-axle carrier element locking element 45.1 and a second counter-axle carrier element locking element 45.2, in particular both counter- 2023P00708WG

[0078] Daimler Truck AG 12 Furkan Özvatan

[0079] August 26, 2025

[0080] Axle carrier element locking elements 45. The axle carrier element 25 has a through-opening 47, with the drive element 15 passing through the through-opening 47. In this case, both counter-axle carrier element locking elements 45.1, 45.2 encompass the through-opening 47, and are arranged concentrically with respect to the through-opening 47.

[0081] Figure 2 shows a schematic representation of the wheel hub gear 1 from Figure 1, engaged in first gear. Partial Figure 2a shows a gear diagram of the wheel hub gear 1 and partial Figure 2b shows a sectional view of the wheel hub gear 1.

[0082] Furthermore, identical and functionally equivalent elements in all figures are provided with the same reference symbols, so that reference is made to the preceding description in each case.

[0083] A current shift position 49, selected from a first shift position 49.1 of first gear, a second shift position 49.2 of second gear, and a third shift position 49.3 of third gear, of the drive element 15, in particular the shift insert 23, along the central axis 17, can be read here by means of the position of a ring gear blocking element 51 of the drive element 15 along the central axis 17 and three shift positions 49 shown with dashed lines. In the first shift position 49.1, first gear is engaged. In the second shift position 49.2, second gear is engaged. In the third shift position 49.3, third gear is engaged. The gear selected from first gear, second gear, and third gear is the one whose shift position 49 aligns the ring gear blocking element 51 radially with the central axis 17 in the transmission diagram.Furthermore, the tooth elements specifically engaged for a given gear are marked by a second arrow 53. The above description also applies to Figures 3 and 4.

[0084] The wheel hub drive 1 is designed and configured such that in first gear the planet carrier 7 is locked to the stationary axle carrier element 25, and that, in particular, a drive torque can be introduced from the drive element 15 via the first sun gear 11.1, via the first planet gears 13.1, via the second planet gears 13.2 – especially in this sequence with respect to a drive torque path – into the ring gear 9. In particular, in first gear the planet carrier 7 cannot rotate about the central axis 17, whereas the second sun gear 11.2, especially when set in rotation by the second planet gears 13.2, can rotate freely.

[0085] Figure 3 shows a schematic representation of the wheel hub gear 1 from Figure 1, shifted into second gear. Partial Figure 3a shows a gear diagram of the wheel hub gear 1 and partial Figure 3b shows a sectional view of the wheel hub gear 1. 2023P00708WG

[0086] Daimler Truck AG 13 Furkan Özvatan

[0087] August 26, 2025

[0088] The wheel hub drive 1 is designed and configured such that, in second gear, the second sun gear 11.2 is locked to the stationary axle carrier element 25, and that, in particular, a drive torque can be introduced from the drive element 15 via the first sun gear 11.1, via the first planet gears 13.1, via the second planet gears 13.2 – specifically in this sequence with respect to a drive torque path – into the ring gear 9. In particular, in second gear, the second sun gear 11.2 can no longer rotate about the central axis 17, with the planet carrier 7 being decoupled from the stationary axle carrier element 25. In particular, the second planet gears 13.2 can roll on the locked second sun gear 11.2 and, in particular, thereby introduce the drive torque into the ring gear 9.

[0089] Figure 4 shows a schematic representation of the wheel hub gear 1 from Figure 1, shifted into third gear. Part 4a shows a gear diagram of the wheel hub gear 1 and part 4b shows a sectional view of the wheel hub gear 1.

[0090] The wheel hub drive 1 is designed and configured such that in third gear the drive element 15 is locked to the ring gear 9 and that, in particular, a drive torque can be introduced directly from the drive element 15 into the ring gear 9. Specifically, in third gear the planet carrier 7 and the second sun gear 11.2 are decoupled from the stationary axle carrier element 25.

[0091] The shifting element 16 is designed and configured to selectively shift the wheel hub gear 1 into a first neutral position 55.1 and a second neutral position 55.2. In particular, in the first neutral position 55.1 and / or in the second neutral position 55.2, neither the planet carrier 7 nor the second sun gear 11.2 is locked to the stationary axle carrier element 25. Similarly, the drive element 15 is not locked to the ring gear 9. The first neutral position 55.1 is located, with respect to a shift travel of the shifting element 16, between the first shift position 49.1 of first gear and the second shift position 49.2 of second gear.

[0092] Alternatively or additionally, it is provided that the second neutral shift position 55.2 is located between the second shift position 49.2 of second gear and the third shift position 49.3 of third gear, with respect to the shift travel of the shift element 16. 2023P00708WÖ

[0093] Daimler Truck AG 14 Furkan Özvatan

[0094] August 26, 2025

[0095] Reference symbol list

[0096] 1 Wheel hub gear

[0097] 3 Wheel hub

[0098] 5.1 First Planetary Theorem

[0099] 5.2 Second Planetary Theorem

[0100] 7 Planetary Carriers

[0101] 9 Ring gear

[0102] 11.1 first sun wheel

[0103] 11.2 second sun wheel

[0104] 13.1 First planetary gears

[0105] 13.2 second planetary gears

[0106] 15 Drive element

[0107] 16 switching element

[0108] 17 Central axis

[0109] 19 Output element

[0110] 21 first arrow

[0111] 23 Switch insert

[0112] 25 axle carrier element

[0113] 27 Flange area

[0114] 29 wheel bolts

[0115] 31 front opening

[0116] 33.1 first fastening element

[0117] 33.2 second fastening element 2023P00708WG

[0118] Daimler Truck AG 15 Furkan Özvatan

[0119] August 26, 2025

[0120] 35 Hollow wheel locking element

[0121] 37 Sealing element

[0122] 39 Hollow gear interior

[0123] 41 external environment

[0124] 43 mounting tool recesses

[0125] 45 Counter-axle carrier element blocking element

[0126] 45.1 first counter-axle carrier element blocking element

[0127] 45.2 second counter-axle carrier element blocking element

[0128] 47 Through-hole

[0129] 49.1 first switching position

[0130] 49.2 second switching position

[0131] 49.3 third shift position

[0132] 51 Ring gear locking element

[0133] 53 second arrow

[0134] 55.1 First neutral switch position

[0135] 55.2 second neutral position

Claims

2023P00708WG Daimler Truck AG 16 Furkan Özvatan August 26, 2025 Patent claims 1. Wheel hub gear (1) for a wheel hub (3) of a commercial vehicle, comprising: - a first planetary set (5.1) comprising a first sun gear (11.1) and first planet gears (13.1), wherein the first sun gear (11.1) and the first planet gears (13.1) mesh; - a second planetary set (5.2) comprising a second sun gear (11.2) and second planet gears (13.2), wherein the second sun gear (11.2) and the second planet gears (13.2) mesh; - a planet carrier (7) comprising the first planet gears (13.1) and the second planet gears (13.2), wherein the first planet gears (13.1) and the second planet gears (13.2) mesh, and - a ring gear (9) that surrounds the second planetary gear set (5.2), wherein the ring gear (9) meshes with the second planetary gears (13.2), wherein - the first sun wheel (11.1) as a drive element (15) having a central axis (17) is designed and configured to be driven by a drive of the commercial vehicle, wherein - the ring gear (9) is designed and configured as a driven element (19) to be connected to a drive wheel of the commercial vehicle, wherein - the drive element (15) is designed and configured as a switching element (16) to selectively switch the wheel hub gear (1) into a first gear, a second gear and a third gear.

2. Wheel hub gear (1) according to claim 1 , wherein - the planet carrier (7) and the second sun gear (11.2) are fixedly mounted on the drive element (15) along the central axis (17) and rotatably mounted on the drive element (15) about the central axis (17), wherein - the drive element (15) is arranged and set up to be moved along the central axis (17) for a gear change. 2023P00708WG Daimler Truck AG 17 Furkan Özvatan August 26, 2025 3. Wheel hub gear (1) according to claim 2, wherein - the wheel hub gear (1) has a shift insert (23) which engages the first sun gear (11.1), the second sun gear (11.2), the first planet gears (13.1), the second planet gears (13.2) and the planet carrier (7), wherein - the switching insert (23) is designed and configured to operate by means of the drive element (15) to be displaced along the central axis (17) in order to select the first gear, second gear and third gear of the wheel hub gear (1).

4. Wheel hub gear (1) according to claim 2 or 3, wherein the wheel hub gear (1) is designed and configured such that - in the first gear the planet carrier (7) is blocked with a fixed axle carrier element (25) so that a drive torque can be introduced from the drive element (15) via the first sun gear (11.1), via the first planet gears (13.1), via the second planet gears (13.2) into the ring gear (9), that - in the second gear the second sun gear (11.2) is locked to the stationary axle carrier element (25) so that a drive torque is transmitted from the drive element (15) via the first sun gear (11.1), via the first planet gears (13.1), can be introduced into the ring gear (9) via the second planet gears (13.2), and that - in the third gear the drive element (15) is locked to the ring gear (9) so that a drive torque can be introduced directly from the drive element (15) into the ring gear (9).

5. Wheel hub gear (1) according to one of the preceding claims, wherein - the switching element (16) is designed and configured to selectively switch the wheel hub gear (1) into a first neutral switching position (55.1) and into a second neutral switching position (55.2), wherein - the first neutral switching position (55.1) with respect to a switching path of the switching element (16) is arranged between first gear and second gear, and / or - the second neutral position (55.2) is located between the second gear and the third gear with respect to the shift path of the shift element (16). 2023P00708WÖ Daimler Truck AG 18 Furkan Özvatan August 26, 2025 6. Wheel hub gear (1) according to one of the preceding claims, wherein - the ring gear (9) is designed as a wheel hub housing hub, and / or - the ring gear (9) has a flange surface (27) which is designed and configured so that a drive wheel of the commercial vehicle can be mounted on it, and / or - the ring gear (9) has an end face opening (31), wherein the ring gear (9) has a first fastening element (33.1), wherein a ring gear locking element (35) has a second fastening element (33.2), wherein the first fastening element (33.1) and the second fastening element (33.2) are designed and interact such that the ring gear locking element (35) can be selectively attached to and removed from the ring gear (9), so that in the attached state the end face opening (31) is closed by means of the ring gear locking element (35) and in the removed state the end face opening (31) is released.

7. Wheel hub gear (1) according to one of the preceding claims, wherein - the drive element (15) has a first end and a second end, wherein the drive element (15) has, extending from the second end, a sun gear bearing for the second sun gear (11.2), the first sun gear (11.1), and a ring gear locking element, wherein the sun gear bearing is designed and configured to mount the second sun gear (11.2) fixedly along the central axis (17) and rotatably about the central axis (17), wherein the ring gear locking element is designed and configured to engage in a counter-ring gear locking element of the ring gear (9) in a gear selected from the first gear, the second gear, and the third gear, and to lock the ring gear (9) to the drive element (15), and / or - the second sun gear (11.2) has a first end and a second end, wherein the second sun gear (11.2) has a first axle carrier element blocking element and a second sun gear toothing extending from the second end, wherein the first axle carrier element blocking element is designed and configured to engage in a gear selected from the first gear, the second gear and the third gear 2023P00708WG Daimler Truck AG 19 Furkan Özvatan August 26, 2025 gear, to engage in a first counter-axle carrier element blocking element (45.1) of the stationary axle carrier element (25) and to block the second sun gear (11.2) with the axle carrier element (25), and / or - the planet carrier (7) has a first end and a second end, wherein the planet carrier (7) has, starting from the second end, a second axle carrier element locking element and planet gears (13), selected from the first planet gears (13.1) and the second planet gears (13.2), wherein the second axle carrier element locking element is designed and configured to engage in a gear selected from the first gear, the second gear and the third gear, with a second counter-axle carrier element locking element (45.2) of the stationary axle carrier element (25) and to lock the planet carrier (7) to the axle carrier element (25), and / or - the ring gear (9) has a first end and a second end, wherein the ring gear (9) has a planetary gear toothing and the mating ring gear locking element starting from the second end, and / or - the fixed axle carrier element (25) has the first counter axle carrier element blocking element (45.1) and the second counter axle carrier element blocking element (45.2).

8. Commercial vehicle, comprising: - a wheel hub gear (1) according to one of the preceding claims, and - a drive which is operatively connected to a drive element (15) of the wheel hub gear (1) and is configured to introduce a drive torque into the drive element (15).

9. Commercial vehicle according to claim 8, wherein - the commercial vehicle has an axle carrier element (25), wherein - the axle carrier element (25) has a counter-axle carrier element blocking element (45), selected from the first counter-axle carrier element blocking element (45.1) and the second counter-axle carrier element blocking element (45.2). 2023P00708WG Daimler Truck AG Furkan Özvatan August 26, 2025 10. Commercial vehicle according to claim 9, wherein - the axle carrier element (25) has a through-opening (47), wherein - the drive element (15) passes through the through-opening (47), wherein - a counter-axle carrier element blocking element (45), selected from the first counter- Axle carrier element blocking element (45.1) and the second counter- Axle carrier element blocking element (45.2) encompasses the through-opening (47).

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