Differential device, power train and vehicle
By setting spiral grooves on the support shaft of the differential device, centrifugal force is used to achieve uniform distribution of lubricating oil, which solves the problem of support shaft wear and ensures good operation of the differential under extreme differential conditions.
Patent Information
- Application Number
- CN202411075452.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2026-02-06
AI Technical Summary
Existing differential devices exhibit high frictional resistance between the support shaft and planetary gears under extreme or high differential conditions, leading to premature wear and failure of the support shaft. Existing lubrication methods also struggle to form a uniform hydrodynamic oil film.
First and second spiral grooves are provided on the mounting section of the support shaft. Centrifugal force is used to distribute the lubricating oil evenly, forming a hydrodynamic oil film to reduce stress concentration and improve the wear of the support shaft.
By distributing lubricating oil evenly, stress concentration on the support shaft is reduced, its service life is extended, and the differential device is ensured to operate well under extreme differential conditions.
Smart Images
Figure CN121474323A_ABST
Abstract
Description
Technical Field
[0001] This disclosure pertains to the field of vehicles. More specifically, this disclosure relates to differential devices, transmission systems including differential devices, and vehicles including such differential devices or such transmission systems. Background Technology
[0002] The vehicle is equipped with a differential, which allows the left and right (or front and rear) drive wheels to rotate at different speeds. The differential mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. The gear carrier includes a support shaft for supporting the two planetary gears. The primary function of the differential is to ensure that the left and right wheels rotate at different speeds when the vehicle is turning or traveling on uneven surfaces, thus guaranteeing that the drive wheels on both sides undergo pure rolling motion.
[0003] With the development of vehicles, especially electric vehicles, higher demands are placed on the performance of differential devices, enabling them to handle very large differentials, even extreme differentials. However, extreme or high differentials can lead to significant frictional resistance between the support shaft and the planetary gears. This frictional resistance hinders the rotation of the planetary gears relative to the support shaft and may even cause failure of the support shaft or planetary gears. Existing technology knows to improve friction between the planetary gears and the support shaft by applying lubricating oil. More specifically, existing technology knows to provide flattened portions, such as two radially opposite flattened portions, at the mating points of the support shaft and planetary gears, allowing lubricating oil to flow between the support shaft and planetary gears through the larger gap created by the flattened portions. However, the flattened portions disrupt the complete circumferential surface of the mating points around the support shaft, making it difficult to form a hydrodynamic oil film that supports the support shaft and centers it relative to the planetary gears. This causes the support shaft to deviate significantly from its theoretical center, resulting in stress concentration points near the flattened portions. These stress concentration points often lead to premature wear or even failure of the support shaft.
[0004] Therefore, a new differential device is still needed that can overcome the problems in the existing technology. Summary of the Invention
[0005] Therefore, according to one aspect of this disclosure, a differential device is proposed. According to one embodiment, the differential device includes: a first half-shaft gear and a second half-shaft gear disposed opposite to each other; two planetary gears disposed opposite to each other, each planetary gear meshing with the first half-shaft gear and the second half-shaft gear; a planetary gear carrier including a support shaft, the support shaft including two shaft ends disposed opposite to each other and a mounting section disposed at each shaft end, each planetary gear being fitted onto a corresponding mounting section; wherein each mounting section has inner and outer ends opposite to each other, and each mounting section is further provided with at least one first helical groove and / or at least one second helical groove extending along the outer circumferential surface of the support shaft, the first helical groove extending in a first helical direction, and the second helical groove extending in a second helical direction opposite to the first helical direction.
[0006] Therefore, in the differential device proposed in this disclosure, by providing a first helical groove and / or a second helical groove on the outer circumferential surface of the mounting section of the support shaft for mounting the planetary gears, lubricating oil can be allowed to flow into the first helical groove and / or the second helical groove under the action of centrifugal force when the support shaft rotates with the planetary gear carrier. This allows for more even application of lubricating oil between the mounting section of the support shaft and the corresponding planetary gear, and maintains the substantially intact outer circumferential surface of the mounting section. This allows for the generation of a uniform hydrodynamic oil film around the substantially intact outer circumferential surface of the mounting section. This hydrodynamic oil film supports the support shaft at a position closer to the theoretical center relative to the planetary gears, especially the center hole of the planetary gears. Consequently, there are no stress concentration points on the support shaft, effectively improving the problem of premature wear of the support shaft and ensuring the performance of the differential device, especially its good operation under large differential speeds.
[0007] According to various embodiments, the differential device proposed in this disclosure may also include one or more of the following further developments.
[0008] According to some embodiments, the at least one first helical groove and / or the at least one second helical groove extend relative to the planetary gear at the inner end of the mounting section. This arrangement facilitates the smooth flow of lubricating oil from the outside through the extension of the first and / or second helical grooves to the ends outside the planetary gear, achieving better lubrication.
[0009] According to some embodiments, the at least one first helical groove and / or the at least one second helical groove extend relative to the planetary gear at the outer end of the mounting section. This arrangement allows for good distribution and circulation of lubricating oil.
[0010] According to some embodiments, the support shaft includes a central section that narrows relative to the mounting sections and is disposed between two mounting sections, with at least one first helical groove and / or at least one second helical groove opening into the central section. This arrangement further facilitates the flow of lubricating oil into the first and / or second helical grooves via the opening of the first and / or second helical grooves to the ends of the narrowed central section, achieving better lubrication.
[0011] According to some embodiments, the at least one first helical groove and / or at least one second helical groove are configured to extend to the end face of the support shaft. This configuration further promotes good distribution and circulation of lubricating oil.
[0012] According to some embodiments, the at least one first helical groove and / or at least one second helical groove are configured to taper from the inner end to the outer end of the mounting section. This configuration allows the first and / or second helical grooves to have a pumping effect, and the greater the speed difference, the more pronounced the pumping effect, thereby further promoting the lubricating oil to be drawn into the first and / or second helical grooves at a greater flow rate and to flow along the first and / or second helical grooves at a greater flow rate.
[0013] According to some embodiments, the number of the first spiral groove and the number of the second spiral groove are 1-4 each. This arrangement allows for a compromise between good lubrication and sufficient hydrodynamic oil film.
[0014] According to some embodiments, the number of the first spiral groove and the number of the second spiral groove are equal to each other. This further promotes the uniform distribution of lubricating oil along the outer circumferential surface of the mounting section, especially when the support shaft can rotate in two opposite directions of rotation.
[0015] According to some embodiments, the first and second spiral grooves are arranged in a circumferentially evenly distributed manner. This further promotes the uniform distribution of lubricating oil along the outer circumferential surface of the mounting section.
[0016] According to some embodiments, the planetary gear carrier further includes a housing of the differential assembly, the housing being rotatable about a rotation axis, wherein the first half-shaft gear, the second half-shaft gear, the two planetary gears, and the support shaft are at least partially disposed within the housing.
[0017] In some embodiments, the support shaft is coupled to the housing. This simplifies the structural design of the planetary gear carrier.
[0018] Another aspect of this disclosure proposes a drivetrain for a vehicle that includes a differential device according to any of the foregoing embodiments, and thus includes advantages and benefits associated with the differential device.
[0019] Another aspect of this disclosure provides a vehicle that includes a differential device according to any one of the above embodiments or a drivetrain as described above. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:
[0021] Figure 1 A perspective view of a differential device according to an exemplary embodiment is shown;
[0022] Figure 2 A perspective view of a differential device according to an exemplary embodiment is shown, wherein the housing has been removed to show the components within the housing;
[0023] Figure 3 A perspective view of a support shaft and two planetary gears disposed on the support shaft of a differential device according to an exemplary embodiment is shown.
[0024] Figure 4 A perspective view showing a support shaft of a differential device according to an exemplary embodiment and one of two planetary gears disposed on the support shaft;
[0025] Figure 5 A perspective view of the support shaft of a differential device according to an exemplary embodiment is shown.
[0026] List of reference numerals
[0027] 10 Differential device
[0028] 100 First Half-Shaft Gear
[0029] 200 Second Half Shaft Gear
[0030] 300 and 400 planetary gears
[0031] 300 First Planetary Gear
[0032] 400 Second Planetary Gear
[0033] 500 support shaft
[0034] 510 and 520 shaft ends
[0035] 510 First Shaft End
[0036] 520 Second Shaft End
[0037] 530 and 540 installation sections
[0038] 530 First Installation Section
[0039] 540 Second Installation Section
[0040] 531, 541 inner ends
[0041] 532, 542 outer terminals
[0042] 550 First Spiral Groove
[0043] 560 Second Spiral Groove
[0044] 570 Central Section
[0045] 571 First Transition Section
[0046] 572 Second Transition Section
[0047] 580 and 590 support shaft end faces
[0048] 600 housing Detailed Implementation
[0049] The differential device, transmission system, and vehicle according to embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.
[0050] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.
[0051] Unless the context otherwise defines, the singular form includes the plural form. Throughout this specification, the terms “comprising,” “having,” etc., are used herein to specify the presence of the stated features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.
[0052] Furthermore, even though ordinal terms such as "first" and "second" may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one component from other components. For example, without departing from the scope of this disclosure, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.
[0053] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the disclosed product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this disclosure and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0054] According to one aspect of this disclosure, a differential device 10 is provided. According to one embodiment, such as... Figure 1-5 As shown, the differential assembly 10 includes a first half-shaft gear 100 and a second half-shaft gear 200 arranged opposite each other, and two planetary gears 300 and 400 arranged opposite each other, each planetary gear 300 and 400 meshing simultaneously with both the first half-shaft gear 100 and the second half-shaft gear 200. The differential assembly 10 also includes a planetary gear carrier, which may include a support shaft 500 for supporting the two planetary gears 300 and 400. The support shaft 500 includes two shaft ends 510 and 520 arranged opposite each other, and mounting sections 530 and 540 provided at each shaft end 510 and 520, respectively, each planetary gear 300 and 400 being fitted onto the corresponding mounting section 530 and 540. Each of the mounting sections 530, 540 has inner ends 531, 541 and outer ends 532, 542 that are opposite to each other. Each mounting section 530, 540 is also provided with at least one first helical groove 550 and / or at least one second helical groove 560 extending along the outer circumferential surface of the support shaft 500. Each first helical groove 550 is configured to extend along a first helical direction, and each second helical groove 560 is configured to extend along a second helical direction opposite to the first helical direction.
[0055] Therefore, in the differential device 10 disclosed herein, by providing a first helical groove 550 and / or a second helical groove 560 on the outer circumferential surface of the mounting sections 530 and 540 of the support shaft 500 for mounting the planetary gears 300 and 400, lubricating oil can flow into the first helical groove 550 and / or the second helical groove 560 under the action of centrifugal force when the support shaft 500 rotates with the planetary gear carrier, and thereby be applied more evenly between the mounting sections 530 and 540 of the support shaft 500 and the corresponding planetary gears 300 and 400. This allows the substantially intact outer circumferential surface of the mounting sections 530 and 540 of the support shaft 500 to be maintained, thereby allowing a uniform hydrodynamic oil film to be generated around the substantially intact outer circumferential surface of the mounting sections 530 and 540. This hydrodynamic oil film can support the support shaft 500 at a position closer to the theoretical center relative to the planetary gears 300 and 400, especially the center hole of the planetary gears. Therefore, there will be no stress concentration points on the support shaft 500, which can effectively improve the problem of premature wear of the support shaft 500, and the planetary gears 300 and 400 can rotate smoothly around the support shaft 500 due to effective lubrication, ensuring the good operation and performance of the differential device 10, especially the good operation under large differential conditions.
[0056] According to some embodiments, such as Figure 1 and 2 As shown, the support shaft 500 is configured to rotate around the rotation axis X, and the support shaft 500 thus drives two planetary gears 300 and 400 to rotate around the rotation axis X. The planetary gears 300 and 400, in turn, drive the first half-shaft gear 100 and the second half-shaft gear 200 meshing with them to rotate around the rotation axis X. In one embodiment, the planetary gear carrier is configured to rotate around the rotation axis X, and the support shaft 500 is fixedly connected to the planetary gear carrier.
[0057] According to some embodiments, such as Figure 1 The planetary gear carrier also includes a housing 600 of the differential assembly 10, meaning the housing 600 of the differential assembly 10 is part of the planetary gear carrier. The housing 600 is configured to rotate about a rotational axis X. More specifically, a first axle gear 100, a second axle gear 200, two planetary gears 300 and 400, and a support shaft 500 are at least partially disposed within the housing 600. According to one embodiment, the support shaft 500 is coupled to the housing 600, thereby enabling it to rotate together with the housing 600 about the rotational axis X. This simplifies the structural design of the planetary gear carrier and thus simplifies the structural design of the reduction gear assembly 10.
[0058] More specifically, such as Figure 2-4As shown, the two planetary gears arranged opposite each other can be referred to as the first planetary gear 300 and the second planetary gear 400, respectively. The two shaft ends of the support shaft 500 arranged opposite each other can be referred to as the first shaft end 510 and the second shaft end 520, respectively. The mounting section provided at the first shaft end 510 can be referred to as the first mounting section 530, and the mounting section provided at the second shaft end 520 can be referred to as the second mounting section 540. The first planetary gear 300 is fitted onto the first mounting section 530, and the second planetary gear 400 is fitted onto the second mounting section 540. According to one embodiment, a first planetary gear 300 is provided with a first central hole, a second planetary gear 400 is provided with a second central hole, and a support shaft 500 is inserted into the first central hole and the second central hole, so that the first planetary gear 300 is mounted at the first mounting section 510 and the second planetary gear 400 is mounted at the second mounting section 520. The first planetary gear 300 and the second planetary gear 400 are configured to be able to rotate around the rotation axis X together with the support shaft 500 and also rotate around the support shaft 500, thereby realizing differential rotation between the first half-shaft gear 100 and the second half-shaft gear 200.
[0059] According to some embodiments, such as Figure 4-5 As shown, the number of first helical grooves 550 provided on the outer circumferential surface of each of the first mounting section 510 and the second mounting section 520 is 1-4, for example, 2. This arrangement allows for a compromise between good lubrication and sufficient hydrodynamic oil film. Alternatively or additionally, the number of second helical grooves 560 provided on the outer circumferential surface of each of the first mounting section 510 and the second mounting section 520 is 1-4, for example, 2. According to one embodiment, the first helical grooves 550 and the second helical grooves 560 may extend intersectingly on the first mounting section 510 and / or the second mounting section 520. According to one embodiment, the number and / or shape of the first helical grooves 550 provided at the first mounting section 510 and the second mounting section 520 are the same. Additionally or alternatively, the number and / or shape of the second helical grooves 560 provided at the first mounting section 510 and the second mounting section 520 are the same. This further promotes the uniform distribution of lubricating oil along the outer circumferential surfaces of mounting sections 530 and 540, especially when the support shaft 500 can rotate about the rotation axis X in two opposite directions of rotation. According to some embodiments, the first helical groove 550 and / or the second helical groove 560 on the first mounting section 530 and / or the second mounting section 540 are arranged in a circumferentially uniform manner relative to the outer circumferential surface of the support shaft 500. This further promotes the uniform distribution of lubricating oil along the outer circumferential surfaces of mounting sections 530 and 540 and improves the hydrodynamic oil film effect.
[0060] According to some embodiments, such as Figure 2-4As shown, the first helical groove 550 and / or the second helical groove 560 are configured to extend from the inner ends 531, 541 of each of the first mounting section 530 and the second mounting section 540 relative to the corresponding first planetary gear 300 and second planetary gear 400. More specifically, the ends of the first helical groove 550 and / or the second helical groove 560 extend beyond the first planetary gear 300 and the second planetary gear 400. This arrangement facilitates the smooth flow of lubricating oil from outside the planetary gears 300 and 400 through the extended ends of the first helical groove 550 and / or the second helical groove 560, achieving better lubrication and hydrodynamic oil film effect.
[0061] According to some embodiments, such as Figure 2-4 As shown, the support shaft 500 includes a central section 570 that narrows relative to the first mounting section 530 and the second mounting section 540 and is disposed between the first mounting section 530 and the second mounting section 540. A first helical groove 550 and / or a second helical groove 560 disposed on the first mounting section 530 and the second mounting section 540 open to the central section 570. This arrangement further facilitates the flow of lubricating oil into the first helical groove 550 and / or the second helical groove (560) through the opening to the end of the narrowed central section 570, achieving better lubrication and hydrodynamic oil film effect. According to one embodiment, as shown, the narrowed central section 570 extends to the first mounting section 530 via a first transition portion 571 and to the second mounting section 540 via a second transition portion 572. Exemplarily, and not exclusively, the first transition portion 571 and the second transition portion 572 may be in the form of a right-angle shoulder, a beveled shoulder, or a rounded shoulder. The ends of the first spiral groove 550 and / or the second spiral groove 560 can lead to the first transition portion 571 and the second transition portion 572, and thus open to the central section 570. Therefore, when the support shaft 500 rotates, the lubricating oil accumulated in the transmission device 10 can enter the first spiral groove 550 and / or the second spiral groove 560 more smoothly and without any obstruction under the action of centrifugal force, through the opening of the first spiral groove 550 and / or the second spiral groove 560 to the narrowing end of the central section 570, ensuring effective lubrication and thus further improving the hydrodynamic oil film effect.
[0062] According to some embodiments, such as Figure 2-4As shown, at least one first helical groove 550 and / or at least one second helical groove 560 are further configured to extend relative to the first planetary gear 300 and the second planetary gear 400 at the outer ends 532, 542 of the respective first mounting section 530 and second mounting section 540. This arrangement allows for good distribution and circulation of lubricating oil and further improves the hydrodynamic oil film effect. According to some embodiments, the first helical groove 550 and / or the second helical groove 560 are configured to extend to the end faces 580, 590 of the support shaft 500, more specifically, the outer end faces. This arrangement further promotes good distribution and circulation of lubricating oil.
[0063] According to some embodiments, such as Figure 4-5 Schematably, the first helical groove 550 and / or the second helical groove 560 are configured to taper from the inner ends 531, 541 of the first mounting section 530 and the second mounting section 540 toward the outer ends 532, 542. More specifically, the cross-section of the first helical groove 550 and / or the second helical groove 560 decreases as it extends in a helical manner; for example, the cross-section is largest at the inner ends 531, 541 of the mounting sections 530, 540 and smallest at the outer ends 532, 542. This configuration allows the first helical groove 550 and / or the second helical groove 560 to have a pumping effect, and the greater the differential speed, the more pronounced the pumping effect. This further promotes the lubricating oil to be drawn into the first helical groove 550 and / or the second helical groove 560 at a greater flow rate and to flow smoothly along the first helical groove 550 and / or the second helical groove 560 at a greater flow rate, further improving the lubrication effect and the hydrodynamic oil film effect. According to one implementation, the tapering is a uniform tapering; alternatively, the tapering can be a non-uniform tapering.
[0064] Another aspect of this disclosure proposes a drivetrain for a vehicle that includes a differential device 10 according to any of the foregoing embodiments, and thus includes advantages and benefits associated with the differential device.
[0065] Another aspect of this disclosure proposes a vehicle comprising a differential device 10 according to any one of the above embodiments or a drivetrain as described above. According to one embodiment, the vehicle is an electric vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range-extended electric vehicle (REEV), or a fuel cell electric vehicle (FCEV). The vehicle may also be a hydrogen fuel cell vehicle.
[0066] The foregoing description of exemplary embodiments of the differential device, transmission system and vehicle proposed by the present invention has been detailed with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.
[0067] The scope of this disclosure is not limited by the embodiments described above, but by the appended claims and their equivalents.
Claims
1. A differential device (10), comprising: A first half-shaft gear (100) and a second half-shaft gear (200) are arranged opposite to each other; Two planetary gears (300, 400) are arranged opposite to each other, and each planetary gear (300, 400) meshes with the first half-shaft gear (100) and the second half-shaft gear (200); The planetary gear carrier includes a support shaft (500), the support shaft (500) including two shaft ends (510, 520) arranged opposite to each other and mounting sections (530, 540) provided at each shaft end (510, 520), and each planetary gear (300, 400) is sleeved on the corresponding mounting section (530, 540); Each of the mounting sections (530, 540) has inner ends (531, 541) and outer ends (532, 542) that are opposite to each other. Each of the mounting sections (530, 540) is also provided with at least one first spiral groove (550) and / or at least one second spiral groove (560) extending along the outer circumferential surface of the support shaft (500). The first spiral groove (550) extends in a first spiral direction, and the second spiral groove (560) extends in a second spiral direction opposite to the first spiral direction.
2. The differential device (10) according to claim 1, wherein, The at least one first helical groove (550) and / or the at least one second helical groove (560) extend relative to the planetary gears (300, 400) at the inner end (531, 541) of the mounting section (530, 540).
3. The differential device (10) according to claim 2, wherein, The at least one first helical groove (550) and / or the at least one second helical groove (560) extend relative to the planetary gears (300, 400) at the outer ends (532, 542) of the mounting sections (530, 540).
4. The differential device (10) according to any one of claims 1 to 3, wherein, The support shaft (500) includes a central section (570) that narrows relative to the mounting sections (530, 540) and is disposed between the two mounting sections (530, 540), wherein at least one first helical groove (550) and / or at least one second helical groove (560) open to the central section (570).
5. The differential device (10) according to any one of claims 1 to 3, wherein, The at least one first helical groove (550) and / or at least one second helical groove (560) are configured to extend to the end face (580, 590) of the support shaft (500).
6. The differential device (10) according to any one of claims 1 to 3, wherein, The at least one first spiral groove (550) and / or at least one second spiral groove (560) are configured to taper from the inner end (531, 541) of the mounting section (530, 540) toward the outer end (532, 542).
7. The differential device (10) according to any one of claims 1 to 3, wherein, The number of the first spiral groove (550) and the second spiral groove (560) are 1-4 respectively.
8. The differential device (10) according to claim 7, wherein, The number of the first spiral groove (550) and the number of the second spiral groove (560) are equal.
9. The differential device (10) according to claim 8, wherein, The first spiral groove (550) and the second spiral groove (560) are arranged in a circumferentially evenly distributed manner.
10. The differential device (10) according to any one of claims 1 to 3, wherein, The planetary gear carrier also includes a housing (600) of the differential assembly (10), the housing (600) being rotatable about a rotation axis (X), wherein the first half-shaft gear (100), the second half-shaft gear (200), the two planetary gears (300, 400) and the support shaft (500) are at least partially disposed in the housing (600).
11. The differential device (10) according to claim 10, wherein, The support shaft (500) is connected to the housing (600).
12. A drivetrain for a vehicle, comprising a differential device (10) according to any one of the preceding claims.
13. A vehicle comprising a differential device (10) according to any one of claims 1 to 11 or a drivetrain according to claim 12.