Arrangement for an electric or hybrid motor vehicle

Abstract

The invention relates to an arrangement (2) for a motor vehicle (1), the arrangement comprising a casing (3) for a gearbox (30), an electric motor (4) that comprises a shaft (41) of a rotor (42) comprising a bore (45) that opens at a first end (41a) of the shaft (41), suitable for allowing a coolant to flow through, wherein the electric motor (4) comprises a sealing device (5) that comprises a hollow tube (50) arranged on the shaft (41) and a sealing ring (6) arranged on the at least one casing (3) so as to at least partially surround the tube (50), wherein the sealing device further comprises a plurality of bristles (7).

Description

[0001] DESCRIPTION

[0002] TITLE: Arrangement for a motor vehicle with electric or hybrid motor

[0003] The invention relates to an arrangement for a motor vehicle, particularly for a vehicle with an electric or hybrid motor. The invention also relates to a vehicle with an electric or hybrid motor equipped with such an arrangement.

[0004] Vehicles with electric or hybrid motors typically include at least one electric traction and / or propulsion motor to move the vehicle. The electric motor includes, in a known manner, a rotor mounted on a shaft and rotating near a stator. Since the rotor moves at a high rotational speed, for example around 16,000 revolutions per minute, the electric motor tends to heat up during operation.

[0005] Similarly, heating can be observed within a vehicle gearbox used to regulate the rotation speed of a wheel in relation to the rotation speed of the shaft coming out of the electric motor.

[0006] In order to limit such heating and to preserve the integrity of the electric motor, the gearbox and their operation, it is known to integrate one or more cooling systems into the vehicle. An example of known architecture, for example implemented when the motor is partly integrated into a gearbox of the vehicle, consists of providing a cooling system allowing the cooling of the gearbox on the one hand and the electric motor on the other hand. The shaft of the electric motor is then partly hollow so as to allow the fluid connection between a first cooling fluid circuit, in particular oil, present in at least part of the gearbox, and at least a second circuit included in the electric motor.In order to ensure sealing at the interface between the rotor shaft and the gearbox, it is known to integrate a sealing device such as a seal, particularly a high-speed rotary seal. However, such a sealing device has the disadvantages of being bulky, expensive and complicating the installation of the electric motor, particularly in the gearbox.

[0007] The invention falls within this context and aims to propose an alternative to known electric motors making it possible to ensure suitable sealing in a less bulky and less expensive manner. An additional objective of the invention is to simplify the installation of such an electric motor in the vehicle.

[0008] The invention relates to an arrangement for a motor vehicle comprising:

[0009] - a gearbox housing configured to allow the circulation of a cooling fluid at a first circuit and comprising an opening, in fluid connection with said circuit;

[0010] - an electric motor comprising a rotor shaft extending along a first direction and comprising a bore opening at a first end of the shaft so as to allow a fluid connection between the first circuit and at least a portion of the electric motor;the electric motor comprising a sealing device comprising a hollow cannula and a hollow sealing ring configured to allow a fluid connection between the first circuit and the shaft, the cannula being disposed on the first end of the shaft and configured to extend partly into the opening, the sealing ring being disposed on the at least one casing so as to at least partly surround the cannula, the sealing device further comprising a plurality of cilia connected to the cannula and extending in contact with the sealing ring and / or a plurality of cilia connected to the sealing ring and extending at least partly in contact with the cannula and / or the shaft.;

[0011] The eyelashes can be made of a flexible or elastically deformable material. The eyelashes can be made of a material containing carbon, in particular resistant to temperatures above 150°C.

[0012] All or part of the plurality of cilia may extend along a direction parallel, or substantially parallel to the first direction and may be disposed in contact with the first end of the rotor shaft. All or part of the plurality of cilia may extend along a direction transverse, or even orthogonal, to the first direction and is disposed in contact with the cannula.

[0013] All or part of the plurality of eyelashes may have a length greater than or equal to 0.50 mm, or even greater than or equal to 1 mm, or even greater than or equal to 2 mm.

[0014] The sealing device nozzle can be attached and mounted on the shaft. The sealing ring can be attached and mounted on the gearbox housing.

[0015] The cannula of the sealing device can be made of a metallic material.

[0016] A body of the sealing ring, carrying the plurality of eyelashes, may be made of a metallic material, and / or may be overmolded onto the plurality of eyelashes.

[0017] The bore of the shaft may be defined by a first dimension along a direction orthogonal to the first direction, the cannula of the sealing device being at least partly inserted into the bore, and / or the hollow cannula of the sealing device being defined by a second dimension, defined at an inner surface of the cannula, opposite the outer surface, strictly less than the first dimension of the shaft.

[0018] The invention also relates to a vehicle with an electric or hybrid motor comprising an arrangement as defined above.

[0019] Other details, characteristics and advantages will emerge more clearly on reading the detailed description given below, for informational and non-limiting purposes, in relation to the various examples of embodiment illustrated in the following figures:

[0020] Figure 1 is a schematic representation of an embodiment of a vehicle equipped with an arrangement according to the invention, a gearbox and an electric motor.

[0021] Figure 2 is a schematic representation of the arrangement according to the invention.

[0022] Figure 3 is a schematic representation of a sealing device for the electric motor according to a first exemplary embodiment.

[0023] Figure 4 is a schematic representation of the sealing device of the electric motor according to a second exemplary embodiment.

[0024] Figure 5 is a schematic representation of the sealing device of the electric motor according to a third exemplary embodiment.

[0025] Figure 1 schematically illustrates an exemplary embodiment of a motor vehicle 1 according to the invention. The vehicle 1 is a motor vehicle with an electric or hybrid engine. Also, the vehicle 1 can be of any type, for example, a private vehicle, a utility vehicle, a truck or a bus. In particular, the vehicle 1 considered can be a connected and / or autonomous vehicle.

[0026] The motor vehicle 1 is equipped with an arrangement 2 according to the invention. Generally, the arrangement 2 comprises at least one gearbox casing 30 and an electric motor 4, the latter being equipped with a sealing device 5. The vehicle 1 thus comprises a gearbox 30 and the electric motor 4. For example, the electric motor 4 is an electric motor 4 for traction and / or propulsion of the vehicle 1. Particularly, advantageously, the electric motor 4 is at least partially arranged within the gearbox 30.

[0027] The gearbox 30 comprises at least one casing 3. The term "casing" means an envelope, in particular a metal one. According to an exemplary embodiment, the gearbox 30 may comprise a plurality of assembled casings 3. The at least one gearbox casing 30 is advantageously configured to allow the circulation of a cooling fluid FR at the level of at least one part of a first circuit C1. For example, the cooling fluid FR is an oil, in particular lubricating and / or cooling oil intended for cooling at least one part of the gearbox 30. For example, the first circuit C1 of cooling fluid FR is intended for cooling at least one pinion of the gearbox 30.

[0028] The at least one casing 3 comprises an opening 31 arranged in fluid connection with the first circuit C1. The opening 31 is delimited by one or more edges 32. It allows a fluid connection to the first circuit C1. In particular, the opening 31 allows the implementation of a fluid connection between the first circuit C1 and a second circuit C2, included in the electric motor 4, so that the same cooling fluid FR supplies these two circuits, as further explained below. Optionally, the arrangement 2 and / or the vehicle 1 comprises a pump, not shown, capable of circulating the cooling fluid FR in the first circuit C1 and / or the second circuit C2.

[0029] As illustrated in Figures 2 to 5, the electric motor 4 comprises a shaft 41, a rotor 42 and a stator 43. Optionally, the electric motor 4 comprises a housing 44 delimiting an internal volume 400 in which the rotor 42, the stator 43 and at least part of the shaft 41 are arranged. Also, the second circuit C2 is at least partly arranged in the internal volume 400 of the electric motor 4.

[0030] The shaft 41 extends along a first direction 100 and is in particular centered on an axis of rotation 450 parallel to, or coincident with, the first direction 100. The shaft 41 is configured to be moved in rotation around the axis of rotation 450 and is the shaft 41 of the rotor 42. The rotor 42 is thus fixed to the shaft 41 so that the shaft 41 and the rotor 42 are able to rotate concomitantly around the axis of rotation 450, or substantially around the axis of rotation 450. Preferably, the rotor 42 is arranged so as to pivot relative to the stator 43 and opposite it.

[0031] The shaft 41 comprises a bore 45 opening at a first end 41 a of the shaft 41. The term “opening” means that the bore 45 is open to the environment outside the shaft 41. The first end 41 a of the shaft 41 is arranged at the edges 32 of the opening 31 of the casing 3. The shaft 41 is thus capable of implementing the fluid connection between the first circuit C1 and at least a portion of the electric motor 4, in particular the second circuit C2. The bore 45 extends over a portion of a length of the shaft 41, measured along the first direction 100 between the first end 41 a and a second end 41 b of the shaft 41, opposite the first end 41 a and being the furthest from the opening 31 of the casing 3.

[0032] Optionally, the shaft 41 comprises at least one channel 46 connected to the bore 45 and opening into an outer face 410a of the shaft 41, facing the rotor 42. In other words, the at least one channel 46 is arranged so as to extend from the bore 45 to the outer face 410a of the shaft 41. For example, the at least one channel 46 extends transversely, or even orthogonally, to the axis of rotation 450 and / or to the first direction 100. For example, as illustrated, the shaft 41 comprises a plurality of channels 46. The channels 46 are configured to allow the fluid connection between the first volume and the bore 45, and, consequently, between the second circuit C2 and the first circuit C1. An example of circulation of the cooling fluid FR in the shaft 41 is illustrated by arrows in Figures 2 to 5.

[0033] Generally, the sealing device 5 comprises a cannula 50 and a sealing ring 6, configured to allow a fluid connection between the first circuit C1 and the bore 45 of the shaft 41, as well as a plurality of cilia 7.

[0034] The cannula 41 is arranged on the shaft 41. The cannula 50 is a hollow part that is at least partly cylindrical. It comprises an inner surface 51a, delimiting a through passage 52 capable of allowing the circulation of the cooling fluid FR. By "through passage", it is meant that the passage 52 extends from one side to the other within the cannula 50, in particular along the first direction 100. According to a non-limiting exemplary embodiment, the cannula 50 comprises at least one cylindrical portion with a circular or substantially circular base.

[0035] The cannula 50 is arranged on the first end 41a of the shaft 41 of the rotor 42 and is configured to extend partly into the opening 31 of the casing 3 of the gearbox 30, that is to say opposite the edges 32 of the casing 3. Thus, when the arrangement 2 is provided within the vehicle 1, the cannula 50 extends between the shaft 41 and the opening 31 in order to allow the fluid connection between the first circuit C1 and the bore 45 of the shaft 41. The cannula 50 thus also allows the fluid connection between the first circuit C1 and the second circuit C2.

[0036] In particular, the cannula 50 comprises a first end portion 53a, corresponding to a portion of the cannula 50 furthest from the shaft 41, and a second end portion 53b, opposite the first end portion 53a, i.e. proximal relative to the shaft 41. When the arrangement 2 according to the invention is assembled, the first end portion extends at the level of the opening 31 and / or in the opening 31 while the second end portion 53b is connected to the first end 41a of the shaft 41. Also, the first end portion 53a is at least partly complementary in shape to the opening 31 while the second end portion 53b is at least partly complementary in shape to the shaft 41. For example, the first end portion 53a and / or the second end portion 53b is cylindrical.

[0037] The passage 52 formed by the cannula 50 extends in the continuity of the bore 45. According to a particular, optional exemplary embodiment, the passage 52 of the cannula 50 and the bore 45 are centered on the axis of rotation 450 and / or the first direction 100.

[0038] Optionally but preferably, the cannula 50 of the sealing device 5 is attached and mounted on the first end 41a of the shaft 41. For example, the cannula 50 is mounted on the shaft 41 by shrink fitting.

[0039] Optionally but preferably, the cannula 50 of the sealing device 5 is at least partly made of a metallic material, such as steel. In particular, the cannula 50 is made of a material capable of withstanding temperatures greater than or equal to 100°C, or even greater than or equal to 110°C.

[0040] Alternatively, the cannula is at least partly made of a plastic material.

[0041] According to a preferred embodiment, the cannula 50 is sized and arranged so as to be at least partially inserted into the bore 45. In other words, an external dimension of the cannula 50, measured along a direction orthogonal to the first direction 100, is less than or equal to a dimension of the bore 45 measured along this same direction. The dimension considered may be a diameter or a diagonal for example.

[0042] Furthermore, optionally, the passage 52 of the cannula 50 is defined by a second dimension, measured at the level of the internal surface 51a of the cannula 50, strictly less than the first dimension of the bore 45 of the shaft 41 of the rotor 42. A portion of the cannula 50 extending into the bore 45, the space available for the circulation of the cooling fluid FR through the cannula 50 is thus smaller than the space available at the level of the rest of the shaft 41. Such a principle advantageously makes it possible to limit the reflux of the cooling fluid FR from the bore 45 of the shaft 41 towards the passage 52 of the cannula 50.

[0043] The sealing ring 6 is arranged on the casing 3 of the gearbox 30. The sealing ring 6 is configured and arranged at the opening 31 so as to surround the cannula 50 arranged in the opening 31. The sealing ring 6 comprises a body 61 and a through hole 62, that is to say extending from one side to the other within the sealing ring 6. The hole 62 is thus arranged opposite the opening 31 and capable of receiving at least a portion of the cannula 50. The hole 62 is here delimited by an internal circumference 63 of the sealing ring 6, at least partly facing the cannula 50. The sealing ring 6 is arranged so as to extend at a non-zero distance from the cannula 50 so that there is no direct contact between them.For example, at least one dimension of the hole 62 of the sealing ring 6, measured between two opposite points of the internal circumference 63 along a direction orthogonal to the first direction 100, is greater than or equal to a dimension of the opening 31 measured along this same direction. Preferably, the sealing ring 6 extends over the entire circumference of the opening 31. Optionally but preferably, the sealing ring 6 is added and mounted on the edges 32 of the casing 3. For example, the sealing ring 6 can be screwed or mounted on the casing 3 by shrink fitting.

[0044] Preferably, the body 61 of the sealing ring 6 is at least partly made of a metallic material, such as steel. In particular, the shape of the body 61 advantageously allows the sealing device 5 to be manufactured by overmolding said body 61 onto the plurality of eyelashes 7.

[0045] Alternatively or additionally, the body 61 comprises a plastic material.

[0046] The plurality of eyelashes 7 of the sealing device 5 can be carried by the sealing ring 6 and / or by the cannula 50.

[0047] According to a first exemplary embodiment, illustrated in Figure 3, the plurality of eyelashes 7 can be connected to the sealing ring 6 and extend into the space between the sealing ring 6 and the cannula 50 so as to come into contact with an outer surface 51b of the cannula 50, facing the edges 32 of the opening 31 and opposite the inner surface 51a of the cannula 50. The eyelashes 7 are distributed over at least a portion of the inner circumference 63 of the sealing ring 6 surrounding the cannula 50. Preferably, the eyelashes are distributed regularly within the inner circumference 63.

[0048] The sealing ring 6, particularly the body 61 of the sealing ring 6, is, for example, overmolded onto all or part of the plurality of eyelashes 7.

[0049] Preferably, the eyelashes 7 are made of a flexible and / or elastically deformable material. In particular, the eyelashes 7 are made of a material such as carbon or comprising carbon. In particular, the radial load of the eyelashes may be of the order of 7 to 13. In particular, the eyelashes 7 are made of a material resistant to temperatures of the order of 150°C which may be observed at the electric motor 4 due to friction with the cannula 50.

[0050] In the illustrated example, the eyelashes 7 extend along directions transverse, or even orthogonal, to the first direction 100. In particular, the eyelashes 7 extend radially, or perpendicularly, relative to the first direction 100 and / or to the axis of rotation 450 and extend in the direction of the cannula 50. In order to limit the crushing of the eyelashes 7 in contact with the cannula 50, their length is equal or substantially equal to the distance separating the outer surface 51b of the cannula 50 from the inner circumference 63 of the sealing ring 6, such a distance being measured along a radial axis originating from the axis of rotation 450 and passing through the eyelash in question.

[0051] Alternatively or additionally, all or part of the plurality of cilia 7 is inclined relative to the first direction 100 in order to minimize the contact forces on the cannula 50.

[0052] For example, the length of the eyelashes 7 is greater than or equal to 0.50 mm, or even greater than or equal to 1 mm or even greater than or equal to 2 mm. The length of the eyelashes 7 is then evaluated for a portion of the eyelashes 7 not integrated into the mass of the sealing ring 6, that is to say between the internal circumference 63 of the sealing ring and a free end of a considered eyelash.

[0053] Optionally, the eyelashes 7 have a thickness between 10 pm and 100 pm inclusive.

[0054] In the case of the exemplary embodiment illustrated in Figure 3, the plurality of eyelashes 7 can, alternatively, be connected to the cannula 50 and extend into the space between the sealing ring 6 and the cannula 50 so as to come into contact with the internal circumference 63 of the sealing ring 6. The cannula 50 is then, preferably, made of a plastic material and the eyelashes 7 are distributed over the external surface 51b of the cannula 50. The various characteristics set out above, relating to the material, dimensions or position of the eyelashes 7 apply mutatis mutandis to such an alternative.

[0055] According to a second exemplary embodiment, illustrated in Figure 4, the plurality of eyelashes 7 can be connected to the sealing ring 6 and extend into the space between the sealing ring 6 and the shaft 41 so as to come into contact with the first end 41a of the shaft 41 of the rotor 42. The eyelashes 7 are distributed over all or part of a first face 64 of the sealing ring 6, facing the electric motor 4, and in particular distant from the casing 3.

[0056] In particular, the second embodiment is distinguished from the first in that all or part of the plurality of eyelashes 7 extends, for example, along a direction parallel, or substantially parallel to the first direction 100. Here, the term "substantially parallel" means a deviation of the order of ±15° of the direction of extension of the eyelashes 7 relative to the first direction 100 or even a deviation of the order of ±10°.

[0057] Alternatively or additionally, all or part of the plurality of eyelashes 7 connected to the sealing ring 6 and extending into the space between the sealing ring 6 and the shaft 41 so as to come into contact with the first end 41a of the shaft 41 of the rotor 42 is inclined relative to the first direction 100 in order to minimize the contact forces. In particular, such an inclination has a value strictly less than 50°, or even 45° relative to the first direction 100, and strictly greater than -50°, or even -45° relative to this same direction. The eyelashes 7 are preferably distributed on the first face 64 of the sealing ring 6 so as to be arranged at a non-zero distance from the cannula 50. It is understood that the various characteristics set out above, relating to the eyelashes 7, apply mutatis mutandis to the present exemplary embodiment.

[0058] According to a third exemplary embodiment, illustrated in Figure 5, the plurality of eyelashes 7 can be divided into different subsets of eyelashes 7. A first subset 7a of eyelashes 7 can be produced according to one of the alternatives described above with reference to the first exemplary embodiment illustrated in Figure 3. In other words, the first subset 7a of eyelashes 7 is connected to the sealing ring 6 and extends in the space between the sealing ring 6 and the cannula 50 so as to come into contact with the outer surface 51b of the cannula 50 or the first subset 7a of eyelashes 7 is connected to the cannula 50 and extends in the space between the sealing ring 6 and the cannula 50 so as to come into contact with the inner circumference 63 of the sealing ring 6. The eyelashes 7 of the first subset 7a extend transversely, or even orthogonally, to the first direction 100.A second sub-assembly 7b of eyelashes 7 is connected to the sealing ring 6 and extends into the space between the sealing ring 6 and the shaft 41 so as to come into contact with the first end 41a of the shaft 41 of the rotor 42, as described above with reference to FIG. 4. The eyelashes 7 of the second sub-assembly 7b extend parallel to the first direction 100.

[0059] Regardless of the embodiment example implemented, the presence of the eyelashes 7 makes it possible to generate a pressure drop between the outer surface 51 b of the cannula 50 and the inner circumference 63 of the sealing ring 6, and, consequently, at least a portion of the edges 32 of the casing 3 delimiting the opening 31. In particular, the pressure drop generated is greater than the various frictions generated at the opening 31 and the portion of the cannula 50 arranged in the opening 31, namely here the first extreme portion 53 a. This results in a partial, or even total, sealing of the opening 31 sufficient to allow the operation of the electric motor 4 and the suitable circulation of the cooling fluid FR.Due to the pressure drop observed at the outer surface 51b of the cannula 50, the cooling fluid FR circulating between the first circuit C1 and the second circuit C2, in particular under the effect of the pump, is essentially sent through the passage 52 of the cannula 50 then into the bore 45 of the shaft 41 and the leaks observed in the space present between the cannula 50 and the edges 32 of the opening 31 are minimized to an acceptable level, or even eliminated. By "essentially" is meant that more than 50%, or even 75% or even 90%, of the quantity of cooling fluid FR circulating at the opening 31 is directed through the passage 52 of the cannula 50. Such a principle makes it possible to ensure the sealing of the interface between the shaft 41 of rotor 42 and the casing 3 in a more compact and less expensive manner.

[0060] Also, the presence of the eyelashes 7 and their contact with the shaft 41, the cannula 50 and / or the sealing ring 6 advantageously allows the grounding of the electric motor 4 in a space-saving and inexpensive manner.

[0061] Thus, when the vehicle 1 is in operation, the cooling fluid FR circulates in the first circuit C1 so as to allow the cooling of the gearbox 30. At least a portion of the cooling fluid FR is extracted from the first circuit C1, for example by means of the pump, and sent through the opening 31. The extracted cooling fluid FR then passes essentially through the passage 52 of the cannula 50 and is then sent through the bore 45, towards the second circuit C2. Optionally, a minimal portion of the cooling fluid FR passes between the outer surface 51 b of the cannula 50 and the edges 32 of the opening 31 on the one hand or between the outer surface 51 b and the inner circumference 63 of the sealing ring 6. The invention thus proposes an alternative to electric motors, in particular to electric motors integrated in a gearbox.The proposed solution is advantageously compact, simple to implement and inexpensive since it eliminates the need to integrate conventional seals, in particular high-speed rotary seals, and is integrated into the shaft of the electric motor. The proposed solution also ensures the grounding of the electric motor, thereby further optimizing the compactness of the arrangement. Furthermore, the invention can be extended to a wide range of electric motors and simplifies the mounting of the electric motor in the gearbox.

[0062] The present invention cannot, however, be limited to the means and configurations described and illustrated here and it also extends to any equivalent means or configuration and to any technically operative combination of such means insofar as they ultimately fulfill the functionalities described and illustrated in the present document.

Claims

CLAIMS 1. Arrangement (2) for motor vehicle (1) comprising: - a gearbox (30) casing (3) configured to allow the circulation of a cooling fluid (FR) at the level of a first circuit (C1) and comprising an opening (31), in fluid connection with said circuit; - an electric motor (4) comprising a rotor (42) shaft (41) extending along a first direction (100) and comprising a bore (45) opening at a first end (41a) of the shaft (41) so as to allow a fluid connection between the first circuit (C1) and at least a part of the electric motor (4);characterized in that the electric motor (4) comprises a sealing device (5) comprising a hollow cannula (50) and a hollow sealing ring (6) configured to allow a fluid connection between the first circuit (C1) and the shaft (41), the cannula (50) being arranged on the first end (41a) of the shaft (41) and configured to extend partly into the opening (31), the sealing ring (6) being arranged on the at least one casing (3) so as to at least partly surround the cannula (50), the sealing device further comprising a plurality of cilia (7) connected to the cannula (50) and extending in contact with the sealing ring (6) and / or a plurality of cilia (7) connected to the sealing ring (6) and extending at least partly in contact with the cannula (50) and / or the shaft (41 ).; 2. Arrangement (2) according to the preceding claim, in which: - the eyelashes (7) are made of a flexible or elastically deformable material; and / or - the eyelashes (7) are made from a material comprising carbon, in particular resistant to temperatures above 150°C.

3. Arrangement (2) according to one of the preceding claims, in which all or part of the plurality of eyelashes (7): - extends along a direction parallel, or substantially parallel to the first direction and is arranged in contact with the first end of the rotor shaft (41) (42); and / or - extends along a direction transverse, or even orthogonal, to the first direction (100) and is arranged in contact with the cannula (50).

4. Arrangement (2) according to one of the preceding claims, in which all or part of the plurality of eyelashes (7) has a length greater than or equal to 0.50 mm, or even greater than or equal to 1 mm, or even greater than or equal to 2 mm.

5. Arrangement (2) according to one of the preceding claims, in which: - the cannula (50) of the sealing device (5) is attached and mounted on the shaft (41); and / or - the sealing ring (6) is reported and mounted on the casing (3) of the gearbox (30).

6. Arrangement (2) according to one of the preceding claims, in which the cannula (50) of the sealing device (5) is made of a metallic material.

7. Arrangement (2) according to one of the preceding claims, in which a body (61) of the sealing ring (6), carrying the plurality of eyelashes (7): - is made of a metallic material; and / or - is overmolded onto the plurality of eyelashes (7).

8. Arrangement (2) according to one of the preceding claims, in which the bore (45) of the shaft (41) is defined by a first dimension along a direction orthogonal to the first direction (100): - the cannula (50) of the sealing device (5) being at least partly inserted into the bore (45); and / or - the hollow cannula (50) of the sealing device (5) is defined by a second dimension, defined at an inner surface of the cannula (50), opposite the outer surface, strictly less than the first dimension of the shaft (41).

9. Vehicle (1) with electric or hybrid motorization comprising an arrangement (2) according to one of the preceding claims.

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