Motor vehicle wheel ejection assembly

Abstract

The invention relates to a wheel ejection assembly (1) for a motor vehicle wheel comprising a rim (16) having bearing surfaces that project from a hub (12) of said ejection assembly (1). The bearing surfaces extend axially towards an ejection device mounted on a hub carrier (13) of the ejection assembly (1), such that the free end of the bearing surfaces is located opposite the ejection device. The ejection device is configured to generate an axial force on the free ends, in order to detach the rim (16) from the hub (12). The bearing surfaces of the rim (16) extend across openings formed on the hub (12) and slots formed on the brake disc associated with said rim (16), respectively. Figure to be published with the abstract: Fig. 3

Description

Title of the invention: Vehicle wheel ejection assembly for the automobile

[0001] The technical context of the present invention is that of the disassembly of a motor vehicle wheel. More particularly, the invention relates to an assembly for ejecting a motor vehicle wheel.

[0002] After suffering a puncture, it is known that a damaged wheel must be removed from a motor vehicle in order to replace and / or repair it. Such removal generally begins by unscrewing the studs that secure the wheel - via its rim - to the wheel hub. However, it often happens that, even after unscrewing the studs, the wheel remains firmly attached to the hub, making its removal very difficult, if not impossible.

[0003] Rim adhesion to the hub when the studs have been removed can be due to several causes. First, continued exposure to moisture, chemicals, and salts used on roads in winter can cause corrosion of the metal surfaces of the hub and / or the wheel rim. The corrosion forms a layer of oxidation that binds the surfaces together, making it difficult - or even impossible - to remove the wheel. Second, driving on muddy terrain, wet roads, or in adverse weather conditions can cause mud to accumulate around the hub or between the rim and the hub. Over time, the accumulated mud can solidify, contributing to the formation of a bond that prevents the rim from easily separating from the hub. Finally, slight alignment or manufacturing defects can also contribute to making it difficult to remove the rim.

[0004] Such a situation of locking the rim on the hub is not desired and may lead the user, faced with such adhesion of the rim on the hub, to hit the rim with a hammer or a sledgehammer for example, in order to initiate a detachment of the rim. These remedies may lead to damage to certain parts of the wheel, the hub or the braking system, resulting in additional repair costs. In other cases, users faced with such an adhesion situation may call on specialists who will intervene urgently at high costs, which is also not desired. Finally, in still other cases, the user faced with such a situation may be led to use chemical products to dissolve the corrosion or mud. This method presents the risk of damaging the metal surfaces of the wheel.Furthermore, the use of chemicals remains dangerous for the user, in the event of uncontrolled contact with them. skin or eyes for example. Finally, the use of chemical products is also not desirable with regard to respect for the environment.

[0005] The object of the present invention is to propose a new ejection assembly, in order to respond at least in large part to the preceding problems, and to further lead to other advantages.

[0006] Another aim of the invention is to facilitate the disassembly of a wheel and to limit the difficulties of disassembly linked to the residual adhesion of the rim to the hub, once the studs have been removed.

[0007] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with an assembly for ejecting a motor vehicle wheel mounted on a hub, the ejection assembly comprising:

[0008] - a rim of the wheel, the rim comprising a central cylindrical sleeve collar working with the hub;

[0009] - a wheel ejection device and comprising a control circuit coupled to a piston working with the rim;

[0010] - a control unit configured to control the ejection device, in order to be able to selectively configuring the piston into a retracted configuration, in which it exerts minimal or no force on the rim, or into an extended configuration in which it exerts a positive force on the rim, in order to separate said rim from said hub.

[0011] In the context of the present invention, the rim of the wheel has a generally cylindrical conformation, and makes it possible to position and maintain a tire around a circular peripheral edge which extends coaxially around the axis of rotation of the wheel. The rim comprises a central cylindrical sleeve which allows coupling with the hub located opposite. From the central cylindrical sleeve extends a flange in a plane perpendicular or substantially perpendicular to the axis of rotation of the wheel. At a radial end of the distal flange of the central cylindrical sleeve, the rim comprises a rim which extends circularly around the axis of rotation and which forms an internal bearing surface for the tire intended to be associated with the rim.

[0012] In the context of the present invention, the ejection device is configured to facilitate the detachment of the rim from the hub to which it is secured and against which it sometimes remains stuck despite the removal of the fixing studs which bind the rim to the hub. For this purpose, the ejection device comprises the piston, or, more generally, a controlled force generator, making it possible to generate a force parallel to the axis of rotation of the wheel and in the direction of the rim itself. Thus, when generating such an axial force, it is then possible to overcome the adhesion forces which bind the rim to the hub and to allow it to detach.

[0013] In the context of the present invention, the piston - and more generally the ejection device - is integral with the hub or a hub carrier of the wheel. The piston is located on one side of the hub opposite the rim. Furthermore, as mentioned above, the force exerted by the piston is an axial force, i.e. parallel to the axis of rotation of the wheel around the hub. In the context of the present invention, the force is positive when it is oriented from the hub towards the rim. When the piston or the force generator is not stressed, i.e. when it does not produce this positive force on the rim, then it does not generate any force or a minimal force on the rim. Preferably, when the force generator - or the piston - is not used to detach the rim from the hub, then said force generator - or said piston - is located at a distance from the rim and is not in contact or bearing against said rim.

[0014] Thus, the ejection assembly according to the first aspect of the invention solves the technical problem since it offers controlled assistance for removing the wheel. The user of the motor vehicle and facing a puncture can now implement the ejection assembly to overcome the residual adhesion of the rim on the hub once the studs have been removed. Then, the ejection assembly makes it possible to prevent the user from using methods, tools or chemical products that are unsuitable for his own safety, the physical integrity of his motor vehicle or the safety of the environment.

[0015] The ejection assembly according to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

[0016] - the rim comprises at least one bearing surface which extends from a flange of the sleeve central cylindrical and towards the hub, the piston of the ejection device being configured to exert the positive force on the at least one bearing surface. Each at least one bearing surface takes the form of an annular portion which projects from the flange, parallel to the axis of rotation of the wheel. By annular portion, it is understood that a bearing surface takes the form of a cylindrical portion with an oblong and curved guideline, and one generator of which is parallel to the axis of rotation of the wheel. Optionally, each at least one bearing surface takes the form of a conical annular portion, a free end of the bearing surface being narrower than the bearing surface taken at the flange of the cylindrical sleeve. This advantageous configuration makes it easier to press the piston - or the force generator - against the rim when it is necessary to detach the rim from the hub.Furthermore, this configuration makes it possible to bring a bearing face of the piston - or the force generator - closer to the rim when implementing the invention. This then makes it possible to reduce the forces necessary to be generated at the piston or the force generator to detach the rim from the hub; and this. also allows to reduce the size of the piston or the force generator in the hub or in the hub carrier, thus facilitating its integration and limiting the on-board weight.

[0017] - preferably, the rim has several bearing surfaces which are angularly regular evenly distributed around the cylindrical sleeve. This advantageous configuration makes it easier to index the rim on the hub angularly, for example during assembly, and also reduces the risk of wheel buckling, generally caused by poor guidance or inadequate tightening of the rim on the hub;

[0018] - the hub comprises at least one opening located opposite the at least one rim bearing surface, such that each at least one bearing surface of said rim is engaged through the at least one corresponding opening located opposite. Each at least one opening is a through opening of the hub, relative to the axis of rotation of the wheel. Preferably, the hub comprises several openings which are angularly regularly distributed around the cylindrical sleeve and aligned with the corresponding bearing surfaces of the rim. This configuration makes it possible to authorize the angular indexing of the rim on the hub, during its assembly for example. In addition, this advantageous configuration makes it possible to reduce the risk of the wheel buckling as mentioned above. Finally, this arrangement aims to establish a direct and shortest possible connection between the rim and the ejection device;

[0019] - the hub has a number of openings equal to the number of rim bearing surfaces. By way of non-limiting example, the rim has three bearing surfaces regularly distributed around the axis of rotation. Each bearing surface has an angular span of between 10° and 40°. Consequently, the hub preferably has three openings arranged opposite the bearing surfaces of the rim. Each opening has an angular span of, for example, between 11° and 41° in order to allow insertion without play or with minimal play of the bearing surface through one of the openings;

[0020] - each at least one opening of the hub takes the form of an annular slot which passes through the hub from one side to the other, relative to the axis of rotation of the wheel. In other words, each at least one opening has an oblong shape which extends along a portion of a circle centered on the axis of rotation of the wheel. Generally speaking, a shape of the at least one opening is complementary to the shape of the at least one bearing surface of the rim;

[0021] - the ejection assembly comprises a brake disc interposed axially between the rim and hub, the brake disc comprising at least one light located opposite the at least one bearing surface of the rim, such that each at least one bearing surface of said rim is engaged through the at least one corresponding light located opposite. Each at least one light of the brake disc is through: it opens across the brake disc, relative to the axis of rotation of the wheel. This advantageous configuration allows the angular indexing of the rim on the hub and through the brake disc, during its assembly. In addition, this advantageous configuration allows a direct and shortest possible connection to be established between the rim and the ejection device, through the brake disc. Preferably, the brake disc comprises several lights which are angularly regularly distributed around the axis of rotation of the wheel and which are angularly aligned with the corresponding bearing surfaces of the rim;

[0022] - the brake disc has a number of lights equal to the number of bearing surfaces of the rim. By way of non-limiting example, the brake disc has three slots regularly distributed around the axis of rotation. Each slot has an angular span of, for example, between 11° and 41° in order to allow insertion without play or with minimal play of the bearing surface extending from the rim through one of the slots of the brake disc;

[0023] - each at least one light of the brake disc has an annular shape which passes through the brake disc from one side to the other, relative to the axis of rotation of the wheel. In other words, each at least one light has an oblong shape which extends along a portion of a circle centered on the axis of rotation of the wheel. Generally speaking, a shape of the at least one light of the brake disc is complementary to the shape of the at least one bearing surface of the rim;

[0024] - the control circuit of the ejection device is of the hydraulic circuit type, the piston being fluidly coupled to the hydraulic circuit. This advantageous configuration makes it possible to control the movement of the piston and to control the thrust force generated by the piston through hydraulic fluid pressure in the hydraulic circuit and in the piston;

[0025] - the piston is of the type of a cylindrical piston which extends around the axis of rotation of the wheel. This configuration is particularly advantageous for generating a homogeneous force on a bearing face of the rim located opposite, and in particular at the level of each at least one bearing surface which extends projecting from the rim and in the direction of the hub. In addition, this advantageous configuration makes it possible to generate a symmetrical, or homogeneous, or isotropic force around the axis of rotation, thus facilitating the interaction between the ejection device and the rim for its detachment from the hub;

[0026] - the hydraulic circuit forming the control circuit of the ejection device is fluidly coupled to a braking system of the motor vehicle, the ejection assembly comprising a solenoid valve controlled by the control unit allowing braking oil to be diverted towards the piston of the ejection device. This configuration is particularly clever because it allows the use of a hy hydraulic system already present and located near the wheel. The implemented bypass thus makes it possible to reduce development and manufacturing costs. It also makes it possible to reduce the size of the ejection assembly. For this purpose, the solenoid valve is configured to be closed during normal use of the motor vehicle and to be opened in the event of activation of a wheel ejection function by a user of the motor vehicle, via a control panel on a dashboard of said motor vehicle.

[0027] According to a second aspect of the invention, there is provided a motor vehicle comprising at least one ejection assembly in accordance with the first aspect of the invention or according to any of its improvements.

[0028] Various embodiments of the invention are provided, integrating according to all of their possible combinations the different optional characteristics set out here.

[0029] Other characteristics and advantages of the invention will become apparent from the following description on the one hand, and from several exemplary embodiments given for informational and non-limiting purposes with reference to the attached schematic drawings on the other hand, in which:

[0030] [Fig. 1] illustrates a first three-dimensional view of an exemplary embodiment of the ejection assembly according to the first aspect of the invention;

[0031] [Fig.2] illustrates a view perpendicular to the axis of rotation of the wheel - from the side of the hub - of the ejector assembly shown in [Fig.l];

[0032] [Fig.3] illustrates a second three-dimensional view of the illustrated ejection assembly on [Fig.l];

[0033] [Fig.4] illustrates a sectional view of the ejector assembly shown in [Fig.l] and in in use;

[0034] [Fig.5] illustrates an isometric view and a detailed view of a rim fitted the ejection assembly illustrated in [Fig.l];

[0035] [Fig.6] illustrates a front view of a hub fitted to the illustrated ejection assembly on [Fig.l].

[0036] [Fig.7] illustrates an isometric view and a detailed view of a rim fitted the ejection assembly shown in [Fig.l].

[0037] Of course, the features, variants and different embodiments of the invention may be combined with each other, in various combinations, to the extent that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the state of the art. the prior art.

[0038] In particular, all the variants and all the embodiments described can be combined with each other if nothing prevents this combination from a technical point of view.

[0039] In the figures, the elements common to several figures retain the same reference.

[0040] With reference to FIGURES 1 to 4, the invention relates to an ejection assembly 1 for a motor vehicle wheel mounted on a hub 12, the ejection assembly 1 comprising:

[0041] - a rim 16 of the wheel, the rim 16 comprising a central cylindrical sleeve 162 collaborating with hub 12;

[0042] - a wheel ejection device 11 and comprising a control circuit 14 coupled to a piston 110 collaborating with the rim 16;

[0043] - a control unit configured to control the ejection device 11 in order to being able to selectively configure the piston 110 in a retracted configuration in which it exerts minimal or no force on the rim 16, or in a deployed configuration in which it exerts a positive force on the rim 16 in order to separate said rim 16 from said hub 12.

[0044] In the embodiment illustrated in FIGURES 1 to 4, the control circuit 14 of the ejection device 11 is of the hydraulic circuit type, the piston 110 being fluidly coupled to the hydraulic circuit. In particular, the hydraulic circuit forming the control circuit 14 of the ejection device 11 is fluidly coupled to a braking system 15 of the motor vehicle, the ejection assembly 1 comprising a solenoid valve 141 controlled by the control unit making it possible to divert a braking oil towards the piston 110 of the ejection device 11.

[0045] The piston 110 is advantageously of the type of a hydraulic piston 110. Thus, the movement of the hydraulic piston 110 is accomplished through the use of the braking oil present in the braking system 15. The management of the power supply to the hydraulic circuit is taken care of by the anti-lock braking system 15 of the motor vehicle - known by the acronym ABS meaning "Anti Blockier System". Consequently, as visible in [Fig. 3], the solenoid valve 141 is incorporated in the brake circuit 150 of the braking system 15 in order to form a bypass in the direction of the piston 110 forming the ejection device 11: the solenoid valve 141 makes it possible to divert a portion of the braking oil present in the brake circuit 150 in the direction of a fluid conduit 142 which supplies the piston 110 and - more generally - the ejection device 11.The solenoid valve 141 thus facilitates the transmission of hydraulic pressure to the hub 12, and more particularly in the direction of the ejection device 11, and in particular the piston 110. The invention thus makes it possible to take advantage of the hydraulic pressure present in the brake circuit 150 and in the braking system 15 for. supply the piston 110 and allow its movement - that is to say its deployment movement - so as to authorize the detachment dX of the rim 16 against the hub 12 of the wheel.

[0046] Of course, an electronic control system is produced to ensure that the solenoid valve 141 is configured in its configuration allowing circulation of the hydraulic fluid in the fluid conduit 142 supplying the ejection device 11 only under safety conditions, that is to say in particular when the motor vehicle is stationary.

[0047] For this purpose, cleverly, the operation of the ejection assembly 1 is only permitted after voluntary activation - by the user of the motor vehicle - of a command to assist in the ejection of one of the wheels of the motor vehicle via a user interface displayed for example on a dashboard of the motor vehicle. More precisely, in order to be able to implement the ejection assembly 1 according to the invention, it is necessary to first activate it electronically via the dedicated user interface, said ejection assembly 1 being able to be activated only when certain safety conditions are met - alternatively or, preferably, cumulatively - among which we can cite for example the stopping of the motor vehicle, the at least partial lifting of the motor vehicle, the unbolting of all the studs fixing the rim 16 on the hub 12 of the wheel in question.

[0048] Thus, according to the invention, the solenoid valve 141 is configured to be closed during normal use of the motor vehicle and to be open in the event of activation of a wheel ejection function by a user of the motor vehicle, via the user interface specifically displayed on the dashboard of said motor vehicle.

[0049] When the command to use the ejection function is initiated, the control unit controls the control circuit 14 and / or the braking system 15 so as to control the solenoid valve 141 in order to direct the hydraulic fluid of the braking system 15 towards the wheel specifically in question: the pressure increases in the fluid conduit 142 connecting the solenoid valve 141 to the piston 110 forming the ejection device 11, inducing an actuation of the piston 110 and the generation of a force on the rim 16 located in abutment against the piston 110, then producing its detachment dX from the hub 12.

[0050] As visible in FIGURES 1, 2 and 4; the piston 110 is of the type of a cylindrical piston 110 which extends around the axis of rotation 01 of the wheel, making it possible to generate a homogeneous force on a bearing face of the rim 16 located opposite. In other words, the piston 110 forming the ejection device has a circular shape and extends peripherally around the axis of rotation 01 of the wheel. The piston 110 is advantageously housed in the hub carrier 13 of the wheel, on a face oriented axially opposite the associated rim 16, that is to say parallel to the axis of rotation 01 and towards the outside of the motor vehicle.

[0051] With reference to FIGURES 5, 6 and 7, the wheel assembly associated with such an ejection assembly 1 has singularities which make it possible to implement the invention in an efficient and optimal manner.

[0052] In the embodiment illustrated in [Fig.5], the rim 16 comprises several bearing surfaces 163 which all extend from a flange 164 of the central cylindrical sleeve 162 of the rim 16, and in the direction of the hub 12 located opposite. Each bearing surface 163 takes the form of an annular portion which projects from the flange 164, parallel to the axis of rotation 01 of the wheel. Each bearing surface 163 takes the form of a cylindrical portion with an oblong and curved guideline, and one generator of which is parallel to the axis of rotation 01 of the wheel. In other words, as visible in [Fig.5], the direction curve forming each bearing surface 163 extends along a portion of a circular arc centered on the axis of rotation 01 of the wheel, said direction curve delimiting an oblong and preferably regular shape around this portion of a circular arc.As a result, each bearing surface 163 extends in the form of a protrusion constructed on this guideline, following a generator which is parallel to the axis of rotation 01 of the wheel. Each bearing surface 163 extends opposite the hub 12 and in the direction of said hub 12. More particularly, each bearing surface 163 extends in the direction of the hub carrier 13. More precisely still, each protrusion extends in the direction of the piston 110 forming the ejection device 11 located opposite.

[0053] Consequently, the piston 110 of the ejection device 11 is configured to exert the positive force on the at least one bearing surface 163. More particularly, the cylindrical piston 110 is configured to generate a homogeneous force at the free end 165 of each bearing surface 163 which projects from the flange 164 of the rim 16 and in the direction of the hub 12.

[0054] In the embodiment illustrated in [Fig.5], the rim 16 comprises three bearing surfaces 163 which are angularly regularly distributed around the cylindrical sleeve 162. For example, each bearing surface 163 is angularly distant from the following bearing surface 163 by an angle equal to approximately 120°.

[0055] Obviously, all the elements located geometrically between the rim 16 and the piston 110 must have a conformation compatible with the rim 16 as described previously, so as not to hinder the piston 110 from pressing against the free end 165 of the bearing surfaces 163 which extend projecting from the flange 164 of said rim 16.

[0056] For this purpose, as illustrated in [Fig.6], the ejection assembly 1 comprises a brake disc 17 interposed axially between the rim 16 and the hub 12, the brake disc 17 comprising several slots 171, each slot 171 being located radially in facing and opposite one of the bearing surfaces 163 of the rim 16, so that each bearing surface 163 of said rim 16 is engaged through the corresponding light 171 of the brake disc 17 located opposite. Each light 171 of the brake disc 17 is through, relative to the axis of rotation 01 of the wheel. Thus, the brake disc 17 thus modified makes it possible to authorize passage of the bearing surfaces 163 of the rim 16 through the lights 171, so that the free end 165 of the bearing surfaces 163 is located directly opposite and close to - or even in contact with - the piston 110 forming the ejection device 11.

[0057] In the embodiment illustrated in [Fig.6], the brake disc 17 comprises three slots 171 which are angularly regularly distributed around the axis of rotation 01. For example, each slot 171 is angularly distant from the following slot 171 by an angle equal to approximately 120°. In general, the brake disc 17 comprises a number of slots 171 equal to the number of bearing surfaces 163 of the rim 16.

[0058] As visible in [Fig.6], the shape and dimensions of each light 171 of the brake disc 17 are analogous and complementary to the shape and dimensions of the bearing surfaces 163 formed on the rim 16. In particular, each light 171 is obtained by homothetic transformation of the shape of the bearing surfaces 163 of the rim 16 - by swelling - in order to guarantee easy insertion of the bearing surfaces 163 into the corresponding lights 171 located opposite.

[0059] Finally, as illustrated in [Fig.7], the hub 12 of the ejection assembly 1 comprises several openings, each opening being located radially opposite and facing one of the bearing surfaces 163 of the rim 16, so that each bearing surface 163 of said rim 16 is engaged through the corresponding opening of the brake disc 17 located opposite. Each opening of the hub 12 is through, relative to the axis of rotation 01 of the wheel. Thus, the hub 12 thus modified makes it possible to allow the bearing surfaces 163 of the rim 16 to pass through the openings, so that the free end 165 of the bearing surfaces 163 is located directly opposite and close to - or even in contact with - the piston 110 forming the ejection device 11.

[0060] According to the invention, the bearing surfaces 163 of the rim 16, the openings 171 of the brake disc 17 and the openings of the hub 12 are all angularly indexed to each other in order to facilitate the passage of the bearing surfaces 163 of the rim 16 through the openings 171 and the openings respectively, so that the free end 165 of said bearing surfaces 163 is located directly opposite and close to the piston 110 forming the ejection device 11. For this purpose, the rim 16, the brake disc 17 and the hub 12 of the ejection assembly 1 according to the invention advantageously comprise angular indexing means in order to facilitate this alignment during the assembly of said ejection assembly 1.

[0061] In the embodiment illustrated in [Fig.6], the hub 12 has three openings which are angularly regularly distributed around the axis of rotation 01. For example, each opening is angularly distant from the next opening by an angle equal to approximately 120°. Generally speaking, the hub 12 has a number of openings equal to the number of bearing surfaces 163 of the rim 16 and to that of lights 171 of the brake disc 17.

[0062] As visible in [Fig.7], the shape and dimensions of each opening of the hub 12 are analogous and complementary to the shape and dimensions of the bearing surfaces 163 formed on the rim 16. In particular, each opening is obtained by homothetic transformation of the shape of the bearing surfaces 163 of the rim 16 - by swelling - in order to guarantee easy insertion of the bearing surfaces 163 into the corresponding openings located opposite.

[0063] In summary, the invention relates to an ejection assembly 1 for a motor vehicle wheel comprising a rim 16 comprising bearing surfaces 163 which extend projecting from a hub 12 of said ejection assembly 1. The bearing surfaces 163 extend axially towards an ejection device 11 mounted on a hub carrier 13 of the ejection assembly 1, such that the free end 165 of the bearing surfaces 163 is located opposite the ejection device 11. The ejection device 11 is configured to generate an axial force on the free ends, in order to be able to detach the rim 16 from the hub 12. The bearing surfaces 163 of the rim 16 extend respectively across openings provided on the hub 12 and lights 171 provided on the associated brake disc 17. to said rim 16.

[0064] Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, forms, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with each other.

Claims

Claims

1. Ejection assembly (1) for a motor vehicle wheel mounted on a hub (12), the ejection assembly (1) comprising: - a rim (16) of the wheel, the rim (16) comprising a central cylindrical sleeve (162) collaborating with the hub (12); - an ejection device (11) for the wheel and comprising a control circuit (14) coupled to a piston (110) collaborating with the rim (16); - a control unit configured to control the ejection device (11) in order to be able to selectively configure the piston (110) in a retracted configuration in which it exerts minimal or no force on the rim (16), or in a deployed configuration in which it exerts a positive force on the rim (16) in order to detach said rim (16) from said hub (12).

2. Ejection assembly (1) according to the preceding claim, wherein the rim (16) comprises at least one bearing surface (163) which extends from a flange (164) of the central cylindrical sleeve (162) and towards the hub (12), the piston (110) of the ejection device (11) being configured to exert the positive force on the at least one bearing surface (163).

3. Ejection assembly (1) according to the preceding claim, in which each at least one bearing surface (163) takes the form of an annular portion which projects from the flange (164), parallel to the axis of rotation (01) of the wheel.

4. Ejection assembly (1) according to any one of claims 2 or 3, wherein the hub (12) comprises at least one opening located opposite the at least one bearing surface (163) of the rim (16), so that each at least one bearing surface (163) of said rim (16) is engaged through the at least one corresponding opening located opposite.

5. Ejection assembly (1) according to any one of claims 2 to 4, wherein the ejection assembly (1) comprises a brake disc (17) interposed axially between the rim (16) and the hub (12), the brake disc (17) comprising at least one aperture (171) located opposite the at least one bearing surface (163) of the rim (16), so that each at least one bearing surface (163) of said rim (16) is engaged through the at least one corresponding opening located opposite.

6. Ejection assembly (1) according to any one of the preceding claims, in which the control circuit (14) of the ejection device (11) is of the hydraulic circuit type, the piston (110) being fluidly coupled to the hydraulic circuit.

7. Ejection assembly (1) according to the preceding claim, in which the hydraulic circuit forming the control circuit (14) of the ejection device (11) is fluidically coupled to a braking system (15) of the motor vehicle, the ejection assembly (1) comprising a solenoid valve (141) controlled by the control unit making it possible to divert a braking oil towards the piston (110) of the ejection device (H).

8. Ejection assembly (1) according to the preceding claim, wherein the solenoid valve (141) is configured to be closed during normal use of the motor vehicle and to be opened in the event of activation of a wheel ejection function by a user of the motor vehicle, via a control panel of a dashboard of said motor vehicle.

9. Ejection assembly (1) according to any one of the preceding claims, wherein the piston (110) is of the type of a cylindrical piston (110) which extends around the axis of rotation (01) of the wheel.

10. Motor vehicle comprising at least one ejection assembly (1) according to any one of the preceding claims.

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