SE2350019A1 - Transmission arrangement for a vehicle - Google Patents

Abstract

A transmission arrangement (200) for a vehicle (100), comprising a lubricant reservoir (1) and a set of gearwheels (10, 20, 30, 40), the set of gearwheels (10, 20, 30, 40) comprising a first gearwheel (10) rotatable in a first direction of rotation (R) about a first axis (Al) defining an axial direction of the first gearwheel, the first gearwheel being at least partially submerged into the lubricant reservoir to lubricate the first gearwheel,the first gearwheel comprising a plurality of external gear teeth (11), wherein, within at least a subset of the plurality of external gear teeth, each gear tooth (11) comprises a radially outermost top land (12) comprising at least one slanted surface (13, 13a, 13b), wherein the at least one slanted surface extends at an angle (a) with respect to a tangent plane (P) of the first gearwheel (10) as seen from the axial direction.

Description

A TRANSMISSION ARRANGEMENT FOR A VEHICLE TECHNICAL FIELD [0001] aspects, the disclosure relates to a transmission arrangement for a vehicle. The disclosure can The disclosure relates generally to transmissions for vehicles. In particular be applied in heavy-duty vehicles, such as trucks, buses, and construction equipment. Although the disclosure may be described With respect to a particular vehicle, the disclosure is not restricted to any particular vehicle.

BACKGROUND [0002] form of an oil sump for lubrication and cooling of the transmission. Some gearWheels of the Transmissions for vehicles are typically provided With a lubricant reservoir in the transmission are partially submerged into the lubricant reservoir and during rotation, they transport lubricant to other gearWheels arranged in meshing engagement With the submerged gearwheels. id="p-3"

[0003] significant losses, commonly referred to as splash losses. HoWever, many solutions aiming to The lubrication and cooling via the lubricant reservoir are associated With reduce the splash losses tend to also reduce the cooling and thereby reduce the service life of the gearWheels. As such, there is a strive to develop improved technology relating to such transmissions.

SUMMARY [0004] vehicle according to claim 1 is provided. The transmission arrangement comprises a lubricant According to a first aspect of the disclosure, a transmission arrangement for a reservoir and a set of gearWheels, the set of gearwheels comprising a first gearwheel rotatable in a first direction of rotation about a first axis defining an axial direction of the first gearWheel, the first gearWheel being at least partially submerged into the lubricant reservoir to lubricate the first gearWheel. The first gearWheel comprises a plurality of extemal gear teeth, Wherein, Within at least a subset of the plurality of extemal gear teeth, each gear tooth comprises a radially outerrnost top land comprising at least one slanted surface extending from a first face to a second face of the gear tooth, Wherein the at least one slanted surface 2 extends at an angle with respect to a tangent plane of the first gearwheel as seen from the axial direction. [0005] which is in at least some aspect improved with respect to known transmission arrangements.

The first aspect of the disclosure may seek to provide a transmission arrangement A technical benefit may include reduced splash losses thanks to the gearwheel geometry with the slanted surface(s) provided at the top land of the gear tooth. The slanted surface reduces the pressure forces that act on a leading face of the gear tooth and may thereby also reduce the splash losses. The solution according to the first aspect is particularly relevant for transmission arrangements in which torque is transferred between parallel shafts, such as via spur gears or helical gears. id="p-6"

[0006] extend(s) between the two faces of the gear tooth, i.e., a leading face, herein the first face, The top land is the radially outerrnost surface or surfaces of the gear tooth that and a trailing face, herein the second face. The faces are working surfaces of the gear tooth. The at least one slanted surface may constitute a major portion of the top land, such as at least 60% of the top land, or at least 70% of the top land, or at least 80% of the top land, in order to ensure a significant reduction in splash losses. In some cases, the top land consists of a single slanted surface, constituting l00% of the top land. In a circumferential direction of the gearwheel, the at least one slanted surface extends all the way between the two faces of the gear tooth. [0007] wherein each gear tooth of the plurality of extemal gear teeth comprises the radially Preferably, the first gearwheel comprises a plurality of extemal gear teeth, outerrnost top land comprising the at least one slanted surface extending from the first face to the second face of the gear tooth, wherein the at least one slanted surface extends at an angle with respect to a tangent plane of the first gearwheel as seen from the axial direction. Hence, all extemal gear teeth of the first gearwheel are in this case identical. This offers advantages in terms of cost and performance of the gearwheel. id="p-8"

[0008] between a leading edge of the top land and the first axis is smaller than a second radial In some examples, at the at least one slanted surface, a first radial distance distance between a trailing edge of the top land and the first axis, the leading edge and the trailing edge being defined with respect to the first direction of rotation. Combined with the motion of the gearwheel, the geometry of the gear tooth thereby forces the lubricant surface within the lubricant reservoir to stay outside of the leading edge of the following gear tooth to 3 a higher degree. Thereby, the splash losses are expected to be reduced. The trailing edge is the edge forrned between the trailing face (i.e., the second face) and the top land, and the leading edge is the edge forrned between the leading face (i.e., the first face) and the top land. [0009] In both cases, the first gearwheel is a cylindrical gearwheel. When the first gearwheel is a In some examples, the first gearwheel is a spur gearwheel or a helical gearwheel. spur gearwheel, the external gear teeth extend in the axial direction. When the first gearwheel is a helical gearwheel, the external gear teeth extend at an angle with respect to the first axis. The set of gearwheels may in both cases be configured to transmit torque between parallel shafts. [0010] extending in parallel with the tangent plane of the gear tooth. The tangent surface portion In some examples, the top land further comprises a tangent surface portion ensures that a good cooling effect can be achieved. The tangent surface portion may, in the axial direction, be located between two slanted surfaces of the gear tooth, or adjacent a side surface of the gear tooth, such as an axial side surface thereof More than one tangent surface portion may be provided on each gear tooth, such as up to three tangent surface portions. The tangent surface portions may be evenly distributed along a length direction of the gear tooth, i.e., along the axial direction when the first gearwheel is a spur gearwheel. The at least one slanted surface and the one or more tangent surface portions may together form the top land. [0011] In some examples, the at least one slanted surface comprises a first slanted surface and a second slanted surface, wherein the tangent surface portion is located between the first and second slanted surfaces. id="p-12"

[0012] In some examples, the first slanted surface extends from a first side surface of the gear tooth to the tangent surface portion, and the second slanted surface extends from a second side surface of the gear tooth to the tangent surface portion. The side surfaces delimit the gear tooth in the axial direction and may herein form part of a respective axial side surface of the first gearwheel. id="p-13"

[0013] surface. A gearwheel which may significantly reduce splash losses may thereby be achieved. id="p-14"

[0014] In some examples, the at least one slanted surface comprises a single slanted In some examples, the single slanted surface extends from a first side surface of the gear tooth to a second side surface of the gear tooth. As described above, each side surface delimits the gear tooth in the axial direction. 4 id="p-15"

[0015] this case a spur gearwheel. Hence, the top land may comprise one or more slanted surfaces, In some examples, the at least one slanted surface is flat. The first gearwheel is in each slanted surface being a flat surface extending at an angle with respect to the tangent plane. [0016] at least one slanted surface forms a straight line as seen in a cross-sectional plane normal to In some examples, the at least one slanted surface is a curved surface, wherein the the axial direction of the first gearwheel. This may be the case when the first gearwheel is a helical gearwheel. id="p-17"

[0017] tangent plane is within a range of 10-30°, preferably 15-25°. A too large angle may In some examples, the angle between the at least one slanted surface and the compromise lubrication of gear faces and/or gear flanks of the gear teeth and may furtherrnore weaken the gear teeth, and/or cause the gear tooth to interfere with a root of a gear tooth of an opposing gearwheel. Within the suggested ranges, a sufficiently strong gear tooth that reduces splash losses may be achieved, without detrimental effects on the lubrication. [0018] arranged in permanent meshing engagement with the first gearwheel. The second gearwheel In some examples, the set of gearwheels further comprises a second gearwheel may hereby be lubricated via the first gearwheel and does not need to be submerged into the lubricant reservoir. The second gearwheel does not need to comprise a top land with the geometry of the first gearwheel, i.e., comprising a slanted surface. Instead, gear teeth of the second gearwheel may have non-slanted top lands extending in parallel or essentially in parallel to a circumferential direction of the second gearwheel, making the second gearwheel easier to manufacture. id="p-19"

[0019] In some examples, the second gearwheel is arranged outside of the lubricant reservoir and is arranged to be lubricated via the first gearwheel. [0020] In some examples, the transmission arrangement further comprises: - a first shaft configured to be drivingly connected to a power source of the vehicle, - a second shaft configured to be drivingly connected to a driven axle of the vehicle, wherein the set of gearwheels is configured to transmit torque between the first shaft and the second shaft. The transmission may of course comprise a plurality of shafts and gearwheels, wherein one or more of the gearwheels may have the geometry of the first gearwheel as described herein. The one or more first gearwheel may in some examples be arranged on a countershaft of the transmission, wherein the countershaft is arranged to transfer torque between the first shaft and the second shaft via the one or more first gearwheels and one or more second gearwheels. id="p-21"

[0021] According to a second aspect of the disclosure, a vehicle comprising the transmission arrangement according to the first aspect is provided. The vehicle may be a heavy-duty vehicle, such as a heavy-duty truck, a bus, or a working machine. id="p-22"

[0022] The above aspects, accompanying claims, and/or examples disclosed herein above and later below may be suitably combined with each other as would be apparent to anyone of ordinary skill in the art. id="p-23"

[0023] Additional features and advantages are disclosed in the following description, claims, and drawings, and in part will be readily apparent therefrom to those skilled in the art or recognized by practicing the disclosure as described herein.

BRIEE DESCRIPTION oE THE DRAwINGs [0024] With reference to the appended drawings, below follows a more detailed description of aspects of the disclosure cited as examples. The drawings are schematic and not necessarily drawn to scale. id="p-25"

[0025] FIG. 1 is a side view of an exemplary vehicle according to an example. id="p-26"

[0026] FIG. 2 is a sectional view of an exemplary transmission arrangement according to an example. id="p-27"

[0027] FIG. 3 is another sectional view of parts of the transmission arrangement shown in FIG. 2. id="p-28"

[0028] FIG. 4 is a partial side view of a gearwheel according to another example. id="p-29"

[0029] FIG. 5 is partial perspective view of the gearwheel shown in FIG. 4. id="p-30"

[0030] FIG. 6 is a sectional view of a gearwheel according to another example. id="p-31"

[0031] FIG. 7 is schematic top view of a top land of the gearwheel shown in FIG. 6. [0032] FIG. 8 is a schematic partial view of a gearwheel according to another example.

DETAILED DESCRIPTION id="p-33"

[0033] Aspects set forth below represent the necessary information to enable those skilled in the art to practice the disclosure. id="p-34"

[0034] The present disclosure aims at providing a transmission arrangement for a vehicle in which splash losses resulting from lubrication and cooling of the gearwheels within a 6 lubricant reservoir, such as in an oil sump, may be reduced. Lubrication and cooling usually lead to significant losses within the transmission, and it is therefore desirable to find solutions that may reduce the losses without leading to excessive gear tooth temperatures that may reduce the service life of the gearwheel. The present disclosure addresses this problem by modifying a gear tooth geometry of the gearwheel or gearwheels that is/are arranged to rotate within the lubricant reservoir. id="p-35"

[0035] the present disclosure. The vehicle 100 is here a heavy-duty truck, more specifically a towing FIG. 1 depicts a vehicle 100 according to an example embodiment of an aspect of truck, or tractor, for pulling one or more trailers (not shown). The vehicle may be any type of vehicle, including but not limited to buses, wheel loaders, excavators, passenger cars, etc. [0036] combustion engine (ICE), and a transmission 120 according to an example drivingly The vehicle 100 comprises a power source 110, which here is an intemal connected or connectable to the power source 110. A transmission control unit (not shown) may be provided for controlling the transmission 120. The transmission 120 is arranged to transfer torque from the power source 110 to a propeller shaft 160 connecting the transmission 120 to a driven axle 170 that drives driven wheels 180 of the vehicle 100. The drive wheels 180 are here rear wheels of the vehicle 100. Even though drive wheels 180 are shown in this embodiment, it shall be understood that any other type of ground engaging means may be used, such as crawler members of an excavator. id="p-37"

[0037] example, the vehicle may comprise one or more electric power sources in addition to, or Of course, the vehicle 100 may have many different configurations. By way of instead of, the ICE. Furthermore, the transmission 120 does not need to be provided at a front of the vehicle, but may, e.g., be combined with a rear axle of the vehicle. [0038] may be comprised in the transmission 120 illustrated in FIG. 1. The transmission FIG. 2 schematically shows an example of a transmission arrangement 200 which arrangement 200 comprises a first shaft 2 extending along a first axis A1 defining a first axial direction A, and a second shaft 3 extending along a second axis A2, herein parallel to the first axis A1. The first shaft 2 may herein be drivingly connected to the power source 110, either directly or via one or more additional components such as shafts, clutches and/or gearwheels. The second shaft 3 may be drivingly connected to the driven axle 170, either directly or via one or more additional components such as shafts, clutches and/or gearwheels. 7 [0039] A first gearwheel 10 is fixed on the first shaft 2 and is arranged in permanent meshing engagement with a second gearwheel 20, rotatably arranged on the second shaft 3. The first and second gearwheels 10, 20 form a first gear plane. The first gearwheel 10 comprises a plurality of identical external gear teeth 11. A third gearwheel 30 is fixed on the first shaft 2 and is arranged in perrnanent meshing engagement with a fourth gearwheel 40, rotatably arranged on the second shaft 3. The third and fourth gearwheels 30, 40 forrn a second gear plane. First and second gear engaging devices 31, 32 in the forrn of sleeves are provided for selectively fixing the second gearwheel 20 and the fourth gearwheel 40, respectively, to the second axis 3. Hence, torque may be transferred between the shafts 2, 3 at two different gear ratios, depending on which one of the second and fourth gearwheels 20, 40 is fixed to the second shaft 3. [0040] A lubricant reservoir 1, such as an oil sump, is further provided, comprising a lubricant bath 4 having a surface 5. The first gearwheel 10 and the third gearwheel 30 are partially submerged into the lubricant bath 4 within the lubricant reservoir 1. When the first gearwheel 10 rotates, it will lubricate the second gearwheel 20 by transporting lubricant thereto via its gear teeth 11. In the same way, the third gearwheel 30 will, when it rotates, lubricate the fourth gearwheel 40. [0041] Although the transmission arrangement 200 illustrated herein comprises two shafts 2, 3 and four gearwheels 10, 20, 30, 40, many different configurations are possible. For example, three shafts or more may be provided, and the transmission arrangement may comprise more than two gearwheels submerged into the lubricant bath 4. The transmission arrangement may by way of example comprise at least an input shaft, a main shaft, and a countershaft, wherein at least the first gearwheel 10 may be arranged on the countershaft. In some examples, two or more gearwheels may be arranged on the countershaft, wherein at least one is in meshing engagement with at least one gearwheel arranged on the input shaft, and wherein at least one is in meshing engagement with at least one gearwheel arranged on the main shaft. [0042] FIG. 3 illustrates the first gearwheel 10 in greater detail. Reference is also made to FIG. 4 and FIG. 5, illustrating portions of the first gearwheel 10 according to another example. In the example illustrated in FIG. 3, the first gearwheel 10 is a spur gearwheel, with the gear teeth 11 extending in parallel with the first axis A1. In the example illustrated in 8 FIG. 4 and FIG. 5, the gear teeth 11 are helical gear teeth extending at an angle with respect to the first axis A1. id="p-43"

[0043] direction r can further be defined for each gear tooth 11. The first gearwheel 10 is rotatable in The first axis A1 defines an axial direction A of the first gearwheel 10 and a radial a first direction of rotation R about the first axis A1. Within at least a subset of the plurality of external gear teeth 11, each gear tooth 11 comprises a radially outerrnost top land 12. The top land 12 comprises a slanted surface 13, herein a single slanted surface 13, that extends at an angle ot with respect to a tangent plane P of the first gearwheel 10, as seen from the axial direction. The tangent plane P is perpendicular to the radial direction r of the gear tooth 11 and is tangential to a circle defined by rotation of the first gearwheel 10 about the first axis A1. Preferably, all gear teeth 11 of the first gearwheel 10 are identical. id="p-44"

[0044] edge 12b defined with respect to the first direction of rotation R. At the slanted surface 13, a The slanted surface 13 herein extends between a leading edge 12a and a trailing first radial distance dl between the leading edge 12a of the top land 12 and the first axis A1 is smaller than a second radial distance d2 between the trailing edge 12b of the top land 12 and the first axis A1. id="p-45"

[0045] a range of 10-30°, preferably 15-25°. [0046] and a second side surface 16. In the direction of rotation R, each gear tooth 11 is delimited The angle u between the slanted surface 13 and the tangent plane P may be within The gear tooth 11 is in the first axial direction A delimited by a first side surface by a first face 17 and a second face 18, the first face 17 being a leading face in the first direction of rotation R. The single slanted surface 13 extends from the first side surface 15 of the gear tooth 11 to the second side surface 16 of the gear tooth 11. In the example illustrated in FIG. 4 and FIG. 5, the first side surface 15 comprises a radially outerrnost inclined surface portion 15a being adjacent to the slanted surface 13. The second side surface 16 may have a corresponding configuration with a radially outerrnost inclined surface portion (not shown). Hence, the single slanted surface 13 in this example extends between the respective radially outerrnost inclined surface portions. In the first direction of rotation R, corresponding to a circumferential direction of the first gearwheel 10, the single slanted surface 13 extends between the first face 17 and the second face 18. id="p-47"

[0047] extending in parallel with the first axis A1.

In the example illustrated in FIG. 3, the slanted surface 13 is a flat surface 9 id="p-48"

[0048] surface extending along the helical gear tooth 11. The slanted surface 13 herein forms a In the example illustrated in FIG. 4 and FIG. 5, the slanted surface 13 is a curved straight line as seen in a cross-sectional plane norrnal to the first axis A1. The straight line extends at the angle ot with respect to the line that the tangent plane P forrns in the cross- sectional plane. id="p-49"

[0049] of rotation R, the trailing edge 12b of each gear tooth 11 comes into contact with the surface As the first gearwheel 10 is rotated within the lubricant bath 4 in the first direction of the lubricant bath 4 and forces the surface 5 to stay off the leading edges 12a. Hence, a clearance is achieved between the leading edge 12a and the surface 5 of the lubricant bath 4. This will serve to reduce the pressure forces acting on the leading face 17. id="p-50"

[0050] a sectional view. The gear teeth 11 herein extend in parallel with the first axis A1. FIG. 7 FIG. 6 illustrates a portion of a first gearwheel 10 according to another example in schematically illustrates the top land 12 of the first gearwheel 10 illustrated in FIG. 6 in a top view. In this example, the top land 12 comprises a first slanted surface 13a and a second slanted surface 13b, and a tangent surface portion 14 located between the first and second slanted surfaces 13a, 13b. The tangent surface portion 14 herein has a bow-shaped profile as seen in the view illustrated in FIG. 6, although, in other embodiments it may have a different shape. It has been formed by using a machining tool to remove material around a circumference of the first gearwheel 10. The tangent surface portion 14 is parallel to the tangent plane P. id="p-51"

[0051] to another example, with gear teeth 11 extending at an angle with respect to the first axial FIG. 8 illustrates a first gearwheel 10 in the form of a helical gearwheel according direction A. It differs from the example shown in FIG. 4 and FIG. 5 in that it comprises two slanted surfaces 13a, 13b and a tangent surface portion 14 located between the two slanted surfaces 13a, 13b, halfway between the first and second side surfaces 15, 16, and similar to the example shown in FIG. 6 and FIG. 7. The tangent surface portion 14 of each gear tooth 11 extends in parallel with the first direction of rotation R of the first gearwheel 10, corresponding to a circumferential direction of the first gearwheel 10. id="p-52"

[0052] only and is not intended to be limiting of the disclosure. As used herein, the singular forms The terrninology used herein is for the purpose of describing particular aspects LC 7, CC a, an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. It Will be further understood that 77 CC 77 CC' the terrns “comprises, comprising, 1nc1udes,” and/or “including” When used herein specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. id="p-53"

[0053] It Will be understood that, although the terrns first, second, etc., may be used herein to describe Various elements, these elements should not be limited by these terrns. These terrns are only used to distinguish one element from another. For example, a first element could be terrned a second element, and, similarly, a second element could be terrned a first element Without departing from the scope of the present disclosure. id="p-54"

[0054] or “vertical” may be used herein to describe a relationship of one element to another element Relative terrns such as “beloW” or “above” or “upper” or “loWer” or “horizontal” as illustrated in the Figures. It Will be understood that these terrns and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It Will be understood that When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, When an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. id="p-55"

[0055] herein have the same meaning as commonly understood by one of ordinary skill in the art to Unless otherwise defined, all terrns (including technical and scientific terrns) used Which this disclosure belongs. It Will be further understood that terrns used herein should be interpreted as having a meaning consistent With their meaning in the context of this specification and the relevant art and Will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. id="p-56"

[0056] described above and illustrated in the drawings; rather, the skilled person Will recognize that It is to be understood that the present disclosure is not limited to the aspects many changes and modifications may be made Within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the inventive concepts being set forth in the following claims.

Claims (13)

Claims

1. A transmission arrangement (200) for a vehicle (100), comprising a lubricant reserVoir (1) and a set of gearwheels (10, 20, 30, 40), the set of gearwheels (10, 20, 30, 40) comprising a first gearwheel (10) rotatable in a first direction of rotation (R) about a first axis (A1) defining an axial direction (A) of the first gearwheel (10), the first gearwheel (10) being at least partially submerged into the lubricant reserVoir (1) to lubricate the first gearwheel (10), the first gearwheel (10) comprising a plurality of external gear teeth (11), wherein, within at least a subset of the plurality of external gear teeth (11), each gear tooth (11) comprises a radially outerrnost top land (12) comprising at least one slanted surface (13, 13a, 13b) extending from a first face (17) to a second face (18) of the gear tooth (11), wherein the at least one slanted surface (13, 13a, 13b) extends at an angle (ot) with respect to a tangent plane (P) of the first gearwheel (10) as seen from the axial direction.

2. The transmission arrangement (200) according to claim 1, wherein, at the at least one slanted surface (13, 13a, 13b), a first radial distance (dl) between a leading edge (12a) of the top land (12) and the first axis (A1) is smaller than a second radial distance (d2) between a trailing edge (12b) of the top land (12) and the first axis (A1), the leading edge (12a) and the trailing edge (12b) being defined with respect to the first direction of rotation (R).

3. The transmission arrangement according to claim 1 or 2, wherein the first gearwheel (10) is a spur gearwheel or a helical gearwheel.

4. The transmission arrangement (200) according to any one of the preceding claims, wherein the top land (12) further comprises a tangent surface portion (14) extending in parallel with the tangent plane (P) of the gear tooth (11).

5. The transmission arrangement (200) according to claim 4, wherein the at least one slanted surface comprises a first slanted surface (13a) and a second slanted surface (13b), and wherein the tangent surface portion (14) is located between the first and second slanted surfaces (13a, 13b).

6. Docket No.: P2022-0842SE01 /PG22502SE6. The transmission arrangement (200) according to claim 5, Wherein the first slanted surface (13a) extends from a first side surface (15) of the gear tooth (11) to the tangent surface portion (14), and the second slanted surface (13b) extends from a second side surface (16) of the gear tooth (11) to the tangent surface portion (14).

7. The transmission arrangement (200) according to any one of claims 1-3, Wherein the at least one slanted surface comprises a single slanted surface (13).

8. The transmission arrangement (200) according to claim 7, Wherein the single slanted surface (13) extends from a first side surface (15) of the gear tooth (11) to a second side surface (16) ofthe gear tooth (11).

9. The transmission arrangement (200) according to any one of the preceding claims, Wherein the at least one slanted surface (13, 13a, 13b) is flat, or Wherein the at least one slanted surface (13, 13a, 13b) is a curved surface, and Wherein the at least one slanted surface (13, 13a, 13b) forms a straight line as seen in a cross-sectional plane normal to the first axis (A1) of the first gearWheel (10).

10. The transmission arrangement (200) according to any one of the preceding claims, Wherein the angle (ot) between the at least one slanted surface (13, 13a, 13b) and the tangent plane (P) is Within a range of 10-30°, preferably 15-25°.

11. The transmission arrangement (200) according to any one of the preceding claims, Wherein the set of gearwheels further comprises a second gearWheel (20) arranged in permanent meshing engagement With the first gearWheel (10).

12. The transmission arrangement (200) according to any one of the preceding claims, further comprising: - a first shaft (2) configured to be drivingly connected to a power source (110) of the Vehicle (100), Docket No.: P2022-0842SE01 /PG22502SE- a second shaft (3) configured to be drivingly connected to a driven ax1e (170) of the vehicle (100), Wherein the set of gearwheels (10, 20, 30, 40) is configured to transniit torque between the first shaft (2) and the second shaft (3).

13. A vehicle (100) coniprising the transmission arrangenient (200) according to any one of the preceding claims.