FR3059065A1 - RADIAL ASSEMBLY OF CLUTCH MECHANISM ON TRANSMISSION - Google Patents

Abstract

The invention relates to an axial locking device (600) for axially locking a clutch mechanism (10) on a transmission (400) during assembly. The assembly device comprises an axial locking member (610) located on the transmission (400), an axial locking means (620) formed at an outer end of the housing (307) of the actuating system (300). ) of the clutch mechanism (10) and an axial locking element (630) cooperating with the axial locking member (610) and the axial locking means (620) for axially locking the clutch mechanism (10). ) on the transmission (400). The present invention extends both to the clutch mechanism (10) as such including the axial locking means (620), a transmission member (400) on which said clutch mechanism (10) is intended to be mounted, and a transmission system corresponding to the assembly of the clutch mechanism (10) on the transmission (400).

Description

Technical area

The present invention relates in particular to a clutch mechanism, and relates more particularly to a device for assembling such a clutch mechanism on a motor vehicle transmission. It is located in the field of transmission especially for motor vehicles.

State of the art

In known manner, the assembly of a clutch mechanism on a transmission chain is a step that is sometimes difficult to implement due to the difficulty of access to a device for fixing said clutch mechanism to said transmission. .

Fixing devices are known which use screws oriented axially through the clutch mechanism in order to collaborate with a threaded bore located on a face opposite the transmission. This configuration makes the design of such a clutch mechanism more complex since it is necessary to make axial openings in the various elements of the clutch mechanism in order to allow the insertion of the fixing screw through the entire mechanism. 'clutch. Furthermore, the assembly or disassembly operation is made more complex also because it is necessary to angularly index each element of the clutch mechanism in order to match the different openings before the corresponding fixing screw or the fixing tool.

Document WO2015 / 010699A2 is also known, which describes a clutch mechanism implementing fixing devices making it possible to fix said clutch mechanism on a transmission by axially oriented fixing screws situated on a diameter outside the mechanism. clutch. This configuration certainly simplifies the design of the corresponding clutch mechanism because it is no longer necessary to provide the axial openings; on the other hand, the positioning of the fixing screws on a diameter greater than the clutch mechanism leads to a larger radial size of said clutch mechanism. Furthermore, it is necessary to provide a fixing part of the clutch mechanism which makes it possible to couple the clutch mechanism to the transmission, said fixing part comprising in known manner radial extension arms in order to allow the fixing of said clutch mechanism at a larger diameter. The rigidity of the radial extension arms may sometimes not be sufficient, in particular with regard to the vibrations introduced during the operation of the clutch mechanism.

The object of the present invention is to respond at least in large part to the above problems and also to lead to other advantages.

Another object of the invention is to propose a new clutch mechanism to solve at least one of these problems.

Another object of the present invention is to simplify the design of such a clutch mechanism.

Another object of the present invention is to facilitate the assembly of such a clutch mechanism on a transmission.

Statement of the invention

According to a first aspect of the invention, at least one of the abovementioned objectives is achieved with a clutch mechanism intended to be installed between an engine and a motor vehicle transmission, said mechanism comprising:

- a first clutch and a second clutch centered on an axis of rotation;

- a clutch support arranged to radially support the first and second clutches;

- an actuation system comprising a housing housing a first actuator and a second actuator arranged to engage or disengage the first and second clutches respectively;

According to the first aspect of the invention, the clutch mechanism comprises an axial locking means formed on one face of an axial extension part of the casing, a straight line normal to said face being oriented radially or substantially radially, said means axial locking device constituting an axial locking device of the clutch mechanism on the transmission.

In its first aspect, the invention relates to a clutch mechanism in accordance with those marketed in the automotive field, and more particularly those marketed in the aftermarket.

Thus, the clutch mechanism comprises an axial locking means which opens onto a face of the casing which is oriented radially, or substantially radially, in order to allow easier access to said axial locking means by an operator assembling said clutch mechanism. on the transmission. The axial locking means is part of the axial locking device of the clutch mechanism on the transmission. As such, it collaborates with other elements of the axial locking device of the clutch mechanism on the transmission in order to ultimately assemble said clutch mechanism on said transmission. Of course, the other elements of the axial locking device form part of the present invention through other aspects which will be described later.

Thus, the clutch mechanism according to the first aspect of the invention is more easily assembled on a transmission because the radial orientation of the axial locking means will ultimately allow easier access to the various elements of the axial locking device of said mechanism. clutch on said transmission. Indeed, the radial access is easier than an axial access because an operator does not need to "pass through" the clutch mechanism to access the axial locking means of the clutch mechanism: the means of axial locking is accessible in a direction normal to the axis of rotation of the clutch mechanism.

Subsequently, it is not necessary to provide openings in all the elements of the clutch mechanism to allow access to the axial locking means of the clutch mechanism: the latter being directly accessible from a radial direction, the design of the clutch mechanism is simplified.

In general, in the following description and in the claims, the following terms will be used without limitation and in order to facilitate understanding:

~ the adjective "radial" or the adverb "radially" define a direction substantially normal to the axis of rotation O. In particular, a face is oriented radially if a straight line normal to said face is perpendicular or substantially perpendicular to it axis of rotation O; and a part, part or span have a radial extension if they extend in a direction perpendicular or substantially perpendicular to the axis of rotation O;

~ the adjective "axial" or the adverb "axially" define a direction substantially parallel to the axis of rotation O. In particular, a face is oriented axially if a straight line normal to said face is parallel or substantially parallel to the axis of rotation O; and a part, a part or a bearing are of axial extension if they extend in a direction parallel or substantially parallel to the axis of rotation O;

~ "Front" or "rear" depending on the direction relative to an axial orientation determined by the axis of rotation O of rotation of the clutch mechanism and / or of a transmission system, "the rear" designating the part located on the right of the figures, on the side of the transmission, and "the front" designating the left part of the figures, on the side of the engine;

- "inside / inside" or "outside / outside" relative to the axis of rotation O and in a radial orientation, orthogonal to said axial orientation, "inside" designating a proximal part of the axis O and "l 'outside' designating a distal part of the axis.

The clutch mechanism according to the first aspect of the invention may advantageously include at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

- the housing is made of material with the clutch support. Alternatively, the clutch support is attached to the housing and fixed by any fixing means, such as for example by screwing, welding or gluing;

- The clutch mechanism according to the first aspect of the invention comprises an access zone by means of axial locking inside of which the clutch mechanism according to the first aspect of the invention has no elements. The access zone to the axial locking means extends radially outwards relative to said axial locking means. In other words, the clutch mechanism comprises an access zone to the axial locking means forming a clearance so as to be able to “access” directly to the axial locking means without passing through elements: the face of the axial extension range of the housing opens directly, in a radial direction, towards the outside of the clutch mechanism. Preferably, the access zone by means of axial locking extends to a radial distance equal to an outside diameter of the clutch mechanism. Even more preferably, the radial distance over which the access zone extends to the axial locking means is not limited relative to the clutch mechanism: no element of the clutch mechanism penetrates the access zone by means axial locking for any radial distance greater than or equal to the radial distance of said axial locking means;

- the face defines an outer cylindrical surface of the casing, the axial locking means taking the form of a removal of material from said face and delimited axially by at least one side. Thus the material recess forming the axial locking means is delimited axially by a radial extension face or comprising at least one radial component. Advantageously, the recess of material forming the axial locking means is delimited axially by a face situated on the side of the transmission, said recess being "open" on the side of the clutches, that is to say not delimited by a radial extension face;

- The axial locking means is delimited axially by two sides, the removal of material having a transverse U or V profile;

according to a first alternative embodiment, the axial locking means takes the form of a conical surface around the axis of rotation. More particularly, a first end of the conical surface located on the side of the clutches has a smaller diameter than a second end of the conical surface located on the side of the transmission. According to this first alternative embodiment, the conical surface is formed on the face from which the axial locking means is formed, and the conical surface here forms part of said axial locking means. In other words, the conical surface is formed by a removal of material from the face, said removal of material being delimited axially by one side - preferably on the side opposite to the clutches - so as to form a conical surface. According to a second alternative embodiment, the axial locking means takes the form of a radial bore located on the axial extension part of the casing in order to be able to simultaneously carry out a rotational coupling during its assembly on the transmission. According to this second alternative embodiment, the radial bore opens onto the face from which the axial locking means is formed. In other words, the axial locking means here takes the form of a removal of material produced from the face and the transverse profile of which is in the shape of an El. According to a third alternative embodiment, the axial locking means takes the form of a circumferential groove located on the axial extension part of the casing. The transverse profile of the circumferential groove can advantageously take the form of an El or a V;

the casing includes a cylindrical surface allowing centering around the axis of rotation. In particular, the cylindrical bearing surface makes it possible to be able to produce a radial shoulder against a complementary bearing surface of an element of the transmission during the assembly of the clutch mechanism. To this end, the cylindrical bearing surface is located opposite the transmission. Complementarily or alternatively, the casing also comprises a rear face making it possible to achieve axial support against a face opposite the transmission against which the clutch mechanism is intended to be mounted;

the casing comprises first rotational coupling means able to collaborate with second rotational coupling means located on the transmission in order to support a drag torque existing at the casing and / or the clutch support due to the rotation of the clutch mechanism. In particular, the first rotation coupling means take the form of male splines and the second rotation coupling means take the form of female splines. Alternatively, the first rotary coupling means take the form of female splines and the second rotary coupling means take the form of male splines. Alternatively still, the first means of rotation coupling take the form of radial grooves and the second means of rotation coupling take the form of complementary radial grooves;

- The casing comprises first angular indexing means able to collaborate with second angular indexing means located on the transmission. In particular, according to a first alternative embodiment, the first angular indexing means take the form of male grooves and the second angular indexing means take the form of female grooves. Alternatively, according to a second alternative embodiment, the first angular indexing means take the form of female grooves and the second angular indexing means take the form of male grooves. Alternatively still, according to a third variant embodiment, the first angular indexing means take the form of a radial notch and the second angular indexing means take the form of a key engaging in said radial notch. Alternatively again, according to a fourth alternative embodiment, the second angular indexing means take the form of a radial notch and the first angular indexing means take the form of a key engaging in said radial notch;

- The first clutch and the second clutch are arranged in a radial configuration, the first clutch being located radially outside the second clutch;

- the clutch mechanism is of the bumid type;

- The first and second clutch are of the multi-disc type.

According to a second aspect of the invention, there is provided an element of a transmission forming a cavity in which a clutch mechanism according to the first aspect of the invention or to any one of its improvements is intended to be housed. at least partially, said element of the transmission comprising:

- a radial extension span;

An axial locking member of the clutch mechanism, said axial locking member constituting a device for axially locking the clutch mechanism on the transmission, said axial locking member taking the form of an extension span axial extending in the cavity, said axial extension bearing comprising a bore oriented radially.

In its second aspect, the invention relates to an element of the transmission which is intended to collaborate with the clutch mechanism during its assembly on the transmission.

Thus, the transmission element comprises an axial locking member which is part of the axial locking device of the clutch mechanism on the transmission. As such, it is intended to collaborate with other elements of the axial locking device of the clutch mechanism on the transmission, and in particular with the axial locking means of the clutch mechanism according to the first aspect of the invention. or to any of its improvements, as described above.

Of course, the axial locking member located on the transmission element is, in a comparable manner to the axial locking means located on the clutch mechanism, oriented in a radial direction in order to facilitate its access in a direction normal to the axis of rotation of the clutch mechanism.

The transmission element according to the second aspect of the invention may advantageously comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

- The radial extension range extends beyond an outside diameter of the clutch mechanism in order to be able to house said clutch mechanism at least in part, and to be able to protect it once assembled on the transmission;

- the bore of the radial extension seat includes a tapping in order to allow the insertion of a screw helping to assemble the clutch mechanism and in particular to block it axially on the transmission;

- The axial locking member is located radially inside the clutches of the clutch mechanism so as to limit the radial size. More particularly, the axial locking member is located at a diameter between 10% and 5θ% of an outside diameter of the element of the transmission;

- The transmission element takes the form of a clutch housing or a wall of a gearbox housing.

According to a third aspect of the invention, there is proposed a transmission system for a motor vehicle comprising a clutch mechanism according to the first aspect of the invention or to any one of its improvements, and in which transmission system:

- The clutch mechanism is housed in the cavity of the transmission element according to the second aspect of the invention or to any one of its improvements, said transmission element being integral with the transmission;

The axial locking device of the clutch mechanism on the transmission comprises an axial locking element housed in the bore of the axial locking member located on the transmission element and collaborating with the axial locking means located on the axial extension part of the casing.

In its third aspect, the invention relates to a transmission system comprising the clutch mechanism according to the first aspect of the invention or to any one of its improvements and assembled on the transmission via the element of the transmission according to the second aspect of the invention or to any one of its improvements. In particular, the clutch mechanism is assembled on the transmission element via the axial locking device which now includes:

- the axial locking means located on the housing of the clutch mechanism;

- the axial locking member located on the transmission element;

- the blocking element which collaborates with the blocking means and the blocking member in order to achieve said axial blocking. As described below, the blocking element can take several forms, depending on different embodiments of the axial blocking means and the axial blocking member.

Of course, the axial locking member located on the transmission element is, in a comparable manner to the axial locking means located on the clutch mechanism, oriented in a radial direction in order to facilitate its access in a direction normal to the axis of rotation of the clutch mechanism.

The transmission system according to the third aspect of the invention may advantageously comprise at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

- According to a first alternative embodiment, the axial locking element of the axial locking device exerts at least one radial force on the axial locking means, and possibly, in a complementary manner, an axial force on said axial locking means. More particularly, the axial locking element takes the form of a pressure screw housed in the tapped bore of the axial locking member located on the transmission element. In this case, the axial locking means located on the axial extension part of the casing advantageously takes the form of a surface oriented radially or substantially radially, and preferably still a conical surface;

- According to a second alternative embodiment, the axial locking element does not generate any radial force on the axial locking means located on the axial extension surface of the clutch mechanism. More particularly, the axial locking element takes the form of a pin housed in the bore of the axial locking member located on the transmission element. In this case, the axial locking means located on the axial extension part of the casing advantageously takes the form of a bore oriented radially or of a peripheral groove oriented radially in the direction of the bore of the axial locking member . Of course, the bore or the peripheral groove of the element of the transmission are located on a face opposite with respect to the axial locking means located on the clutch mechanism;

the axial extension surface of the transmission element is located radially outside the axial extension part of the casing;

the axial locking device is located axially in an intermediate position between the transmission and the clutch mechanism so that the axial locking device is located in an axially offset position relative to the clutches of the clutch mechanism, and in particular to facilitate accessibility to said axial locking device during assembly of the clutch mechanism on the transmission;

an inner face of the axial extension surface of the clutch housing is parallel to an outer face of the axial extension part of the casing;

the casing includes a cylindrical surface allowing centering with respect to a cylindrical surface complementary to the element of the transmission. In particular, the cylindrical bearing surface of the transmission element forms a radial shoulder against the cylindrical bearing surface of the casing, and / or the cylindrical bearing surface of the transmission element forms an axial shoulder against the cylindrical bearing surface of the casing;

in a transmission system according to the third aspect of the invention or to any of its improvements:

- the first clutch is coupled in rotation to a first output shaft of the transmission by means of a first output disc holder;

- the second clutch is coupled in rotation to a second output shaft of the transmission by means of a second output disc holder;

- The first and second clutches are alternately coupled in rotation to an inlet sail, said inlet sail being coupled in rotation to an inlet shaft driven in rotation by at least one crankshaft;

the clutch mechanism is coupled in rotation to the input shaft by means of a torsional vibration damper.

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According to a fourth aspect of the invention, a method is proposed for assembling a clutch mechanism according to the first aspect of the invention or to any of its improvements on a transmission and comprising the following steps:

- assembly of the clutches on the clutch support and / or the casing of the actuation system, such an assembly forming the clutch mechanism;

- engagement of the clutch mechanism on at least one of the shafts of the transmission;

- axial locking of the clutch mechanism on the transmission element by means of an axial locking element in the bore of the axial locking member located on the transmission element and collaborating with the means axial locking located on the axial extension part of the housing.

The assembly process in accordance with the fourth aspect of the invention may advantageously comprise at least one of the additional steps below, the technical characteristics forming these additional steps can be taken alone or in combination:

- the axial locking element is pre-mounted on the transmission element before the clutch mechanism is engaged;

- The axial locking element takes the form of a pre-mounted pressure screw in the threaded bore of the axial locking member;

- The assembly process includes a step of centering the clutch mechanism on the transmission element, prior to the axial locking step;

- The assembly process includes a step of rotationally coupling the clutch mechanism to the element of the transmission;

- The assembly process includes a step of angular indexing of the clutch mechanism on the transmission element and around the axis of rotation;

Various embodiments of the invention are provided, integrating according to all of their 25 possible combinations the different optional characteristics set out here.

Description of the figures

Other characteristics and advantages of the invention will appear further from the following description on the one hand, and from several exemplary embodiments given by way of non-limiting indication with reference to the appended schematic drawings on the other hand, in which :

- FIGURES 1A and 1B respectively illustrate views in axial section of a first and of a second embodiment of the clutch mechanism according to the first aspect of the invention;

- FIGURES 2A and 2B respectively illustrate perspective views of the clutch mechanisms illustrated in FIGURES 1A and 1B;

- FIGURES 3A and 3B respectively illustrate detailed views of an axial locking device for the clutch mechanisms illustrated respectively in FIGURES 1A and 1B on a transmission;

- FIGURE 4 illustrates an exemplary embodiment of a transmission element according to the second aspect of the invention.

Of course, the characteristics, the variants and the various embodiments of the invention can be associated with one another, according to various combinations, insofar as they are not incompatible or mutually exclusive of each other. One can in particular imagine variants of the invention comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from in the prior art.

In particular, all the variants and all the embodiments described can be combined with one another if nothing is technically opposed to this combination.

In the figures, the elements common to several figures keep the same reference.

Detailed description of the invention

With reference to FIGURES 1A, 1B, 2A and 2B, a clutch mechanism 10 in accordance with the first aspect of the invention is described in the following paragraphs, through its common characteristics. The specific features of each embodiment of such clutch mechanisms 10 relating to the axial locking devices of said clutch mechanisms 10 on a transmission will be illustrated later with reference to FIGURES 3A and 3B.

General embodiment

The illustrated embodiment of the clutch mechanism 10 according to the first aspect of the invention is preferably of the wet double clutch type, and preferably still in a so-called radial position, the first clutch 100 being located outside the second clutch 200. The clutch mechanism 10 is integrated on a transmission chain 1 comprising 4θθ transmission coupled in rotation to the clutch mechanism 100.

Alternatively, the clutch mechanism 10 can be configured in a so-called axial position, the first clutch 100 being arranged axially towards the rear and the second clutch 200 being arranged axially towards the front.

In general, the clutch mechanism 10 is arranged to be able to couple in rotation an input shaft not shown to a first drive shaft A1 or alternatively to a second drive shaft A2 via the first clutch respectively 100 or the second clutch 200.

In the context of the invention, the input shaft is rotated by at least one crankshaft of an engine, for example a heat engine; and the first and second transmission shafts A1, A2 are intended to be coupled in rotation to the 4θθ transmission such as for example a gearbox of the type of those fitted to motor vehicles. The means for rotationally coupling the first and second transmission shafts A1 and A2 are not shown.

Preferably, the first transmission shaft A1 and the second transmission shaft A2 are coaxial. More particularly, the second drive shaft A2 takes the form of a hollow cylinder inside which the first drive shaft A1 can be inserted.

As illustrated in FIGURES 1A, 1B, 2A and 2B, the first clutch 100 and the second clutch 200 are advantageously of the multi-disc type. Each multi-plate clutch comprises on the one hand a plurality of first friction elements 101, 201, such as for example flanges, connected in rotation with the input shaft, and on the other hand a plurality of second friction elements 102, 202, such as for example friction discs, joined in rotation with at least one of the transmission shafts A1, A2.

Optionally, the plurality of first friction elements 101, 201 consists of friction discs linked in rotation to the input shaft, and the plurality of second friction elements 102, 202 consists of flanges connected in rotation to at least one of the drive shafts A1, A2.

The first drive shaft A1 is coupled in rotation to the input shaft and driven by it in rotation when the first clutch 100 is configured in a so-called engaged position for which the plurality of first friction elements 101 is coupled in rotation to the plurality of second friction elements 102. Alternatively, the first transmission shaft A1 is decoupled in rotation from the input shaft when the first clutch 100 is configured in a so-called disengaged position for which the plurality of first friction elements 101 is decoupled in rotation to the plurality of second friction elements 102.

Similarly, the second transmission shaft A2 is coupled in rotation to the input shaft and driven by it in rotation when the second clutch 200 is configured in a engaged position for which the plurality of first friction elements 201 is coupled in rotation with the plurality of second friction elements 202. Alternatively, the second transmission shaft A2 is decoupled in rotation from the input shaft when the second clutch 200 is configured in a so-called disengaged position for which the plurality of first elements friction element 201 is decoupled in rotation to the plurality of second friction elements 202.

Of course, each clutch 100, 200 can take any configuration between the engaged configuration and the disengaged configuration.

In the clutch mechanism 10 illustrated in FIGS. 1A, 1B, 2A and 2B, the first clutch 100 is arranged to engage the odd ratios of the transmission and the second clutch 200 is arranged to engage the even ratios and the reverse of the transmission. Alternatively, the ratios supported by said first clutch 100 and second clutch 200 can be respectively reversed.

The first clutch 100 and the second clutch 200 are arranged to alternately transmit a so-called input power - a torque and a speed of rotation - from the input shaft, to one of the two transmission shafts A1, A2, as a function of the respective configuration of each clutch 100 and 200 and by means of an input web 109 ·

The clutches 100 and 200 are arranged so as not to be simultaneously in the same clutch configuration. In contrast, the first and second clutches 100, 200 can simultaneously be configured in their disengaged position.

The clutch mechanism 10 comprises an input element which is coupled in rotation on the one hand to the input shaft and on the other hand to the input web 109 in order to transmit the power - the torque and the speed. rotation - generated at the engine at one of the clutches 100, 200 of the clutch mechanism 10. Preferably, the input element of the clutch mechanism 10 comprises an input hub 130, preferably in rotation around the axis O. On its lower elongation, the input hub 130 is linked in rotation and / or axially to the input shaft, optionally by means of a damping device not shown such that 'a double damping flywheel for example.

On its outer elongation, the entry hub 130 is coupled to the entry veil 109, and more particularly at a lower end and located towards the front of said entry veil 109 ·

Preferably, the entry veil 109 and the entry hub 130 are integral, for example fixed by welding and / or by riveting.

On the side of its upper end, the input web 109 is linked in rotation to the first clutch 100 by means of an input disk carrier 106, the input disk carrier 106 being linked in rotation to the web inlet 109, preferably by cooperation of shapes, for example by grooves.

The first and second clutches 100 and 200 are controlled by an actuation system 300 which is arranged to be able to configure them in any configuration between the clutch configuration and the disengaged configuration.

The actuation system 300 includes:

- A first actuator 320 arranged to configure the first clutch 100 in a configuration between the engaged configuration and the disengaged configuration;

- A second actuator 330 arranged to configure the second clutch 200 in a configuration between the engaged configuration and the disengaged configuration;

A casing 307 in which are housed at least part of the first and second actuators 320, 330.

The casing 307 is preferably made in one piece. Optionally, it can be produced by assembling several parts. For example, the actuation system may comprise a clutch support 500 attached to the housing and located axially at least in part between the housing 307 and the input hub 130. The clutch support 500 is at least coupled in rotation with the housing 300, and preferably the clutch support 500 is also axially coupled to the housing 307 · To do this, the clutch support 500 can for example be mounted without radial clearance in a bore of the housing 307 in order to produce a coupling in rotation between said clutch support 500 and the casing 307 of the actuation system 300. Alternatively, the clutch support 500 can be crimped into a bore of the casing 307 ·

Preferably, the first and second actuators 320 and 330 are of the hydraulic cylinder type. The first and second actuators 320, 330 may each include an annular piston, each annular piston being coaxial with the axis O and developing an axial movement to configure the corresponding clutch. In this case, the actuation system 300 also includes a hydraulic fluid supply channel for each actuator 320, 330.

Preferably, the hydraulic fluid is a pressurized fluid, for example oil.

The first actuator 320 is linked to the first clutch 100 by means of a first decoupling bearing 140 on the one hand and a first force transmission member 105 on the other hand The first decoupling bearing 140 is arranged to transmit axial forces generated by the first actuator 320 to the first force transmitting member 105 The first force transmitting member 105 takes the form of a corrugated sheet metal curved axially forward at its outer radial end. The first force transmission member 105 is arranged to transmit an axial force to the first clutch 100 via its external elongation 104, said external elongation 104 extending axially forwards so as to be able to spread or press the first friction elements 101 against the second friction elements 102 on the one hand, and against an external reaction means 103 of the inlet web 109 on the other hand. When the first friction elements 101 are spaced from the second friction elements 102, then the first clutch 100 is configured in its disengaged configuration. On the other hand, when the first friction elements 101 are pressed against the second friction elements 102, then the first clutch 100 is configured in its engaged configuration.

By way of nonlimiting example, the first force transmission member 105 can be obtained by stamping.

The external reaction means 103 is integral with the entry veil 109 · Preferably, the external reaction means 103 is made from material of the entry veil 109; alternatively, the external reaction means 103 is fixed integrally to the inlet web 109 by any fixing means, such as for example by riveting or by welding.

The external reaction means 103 has a shape complementary to that of the first or second friction elements 101, 102, so as to allow friction coupling of the first and second friction elements 101, 102 when the first actuator 320 exerts an axial force forward to configure the first clutch 100 in its engaged position. Conversely, when the first force transmission member 105 is pushed backwards by elastic return means which will be described later, then the first friction elements 101 separate from the second friction elements 102, thus making it possible to decouple said elements friction elements and thus making it possible to configure the first clutch 100 in its disengaged configuration.

The external reaction means 103 notably has external grooves which cooperate with corresponding internal grooves of the input disc holder 106.

The first clutch 100 is intended to be coupled in rotation to the first transmission shaft A1 by means of a first output disc holder 110 forming an output element of said first clutch 100. More particularly, the first disc holder of outlet 110 is coupled in rotation to the second friction elements 102 at its upper end on the one hand, and on the other hand to a first outlet hub 120 at its lower end.

The first outlet disc holder 110 has on its outer radial periphery an axial elongation 107 which is provided with a toothing intended to cooperate with a complementary toothing on each second friction element 102, and more particularly at the inner radial periphery of each second friction element 102 of the first clutch 100. The first output disc holder 110 is thus coupled in rotation by engagement with the second friction elements 102 of the first clutch 100.

At its lower radial end, the first outlet disc holder 110 is linked to the first outlet hub 120, preferably fixed together by welding or by riveting.

The first outlet hub 120 has radially inside the axial grooves arranged to cooperate with complementary grooves located on the first drive shaft A1, so as to achieve a rotation coupling.

The first clutch 100 also includes elastic return means for automatically pushing the first actuator 320 into the disengaged position. Preferably, the elastic return means are formed by elastic washers, such as corrugated washers of the "Onduflex TM" type. The elastic return washers are interposed axially between the second friction elements 101, 102. They are preferably arranged radially inside the first friction elements 101. Each elastic return washer is axially supported against the front radial face of a second friction element 102 and against the rear radial face of another second friction element 102 axially adjacent.

The elastic return means axially urge the second friction elements in order to facilitate the release of the first friction elements 101 and the return of the first actuator 320 to the disengaged position.

A radial bearing 117 is interposed between the first outlet hub 120 and the inlet hub 130 in order to withstand the radial forces of the inlet hub 130 and / or the inlet web 109 despite the different rotational speeds which can respectively turn the input shaft and the first drive shaft Al.

Similarly, the second clutch 200 of the clutch mechanism 10 is similar in design to that of the first clutch 100.

The second actuator 330 is linked to the second clutch 200 by means of a second decoupling bearing 240 on the one hand and a second force transmission member on the other hand

205- The second decoupling bearing 240 is arranged to transmit axial forces generated by the second actuator 330 to the second force transmission member 205 The second force transmission member 205 is located axially between the input disc holder 106 and the first force transmission member 105 The second force transmission member 205 is arranged to transmit an axial force to the second clutch via its upper elongation, said upper elongation extending axially forwards and through an opening 108 arranged in the input disc holder 106 in order to be able to spread or press the first friction elements 201 against the second friction elements 202 on the one hand, and against an internal reaction means 203 on the other hand. When the first friction elements 201 are spaced from the second friction elements 202, then the second clutch 200 is configured in its disengaged configuration. On the other hand, when the first friction elements 201 are pressed against the second friction elements 202, then the second clutch 200 is configured in its engaged configuration.

The second force transmission member 205 takes the form of a corrugated sheet metal which is curved axially towards the front at its outer radial end. The second force transmission member 205 is arranged to transmit an axial force to the second clutch 200 via its external elongation 204, said external elongation 204 extending axially forward so as to be able to spread or press the first friction elements 201 against the second friction elements

202 on the one hand, and against an internal reaction means 203 of the entry veil 109 on the other hand. When the first friction elements 201 are spaced from the second friction elements 202, then the second clutch 200 is configured in its disengaged configuration. On the other hand, when the first friction elements 201 are pressed against the second friction elements 202, then the second clutch 200 is configured in its engaged configuration.

By way of nonlimiting example, the second force transmission member 205 can be obtained by stamping.

The internal reaction means 203 is integral with an axial elongation portion 206 facing forward and integral with the input disk carrier 106, fixed to the input disk carrier 106 by any means, such as for example by welding or riveting. Alternatively, the internal reaction means 203 and the input disc holder 106 are made from material. The external reaction means

203 has a shape complementary to that of the first or second friction elements 201, 202, so as to allow friction coupling of the first and second friction elements 201, 202 when the second actuator 330 exerts an axial force towards the front to configure the second clutch 200 in its engaged position. Conversely, when the second force transmission member 205 is pushed forward by elastic return means which will be described later, then the first friction elements 201 separate from the second friction elements 202, then making it possible to decouple said elements friction elements 201, 202 and thus allowing the second clutch 200 to be configured in its disengaged configuration.

By way of nonlimiting example, the external reaction means 203 can take the form of a ring with teeth on the external periphery and a central support groove which extends axially towards the rear.

The second clutch 200 is intended to be coupled in rotation to the second transmission shaft A2 via a second output disc holder 210 forming an output element of said second clutch 200. More particularly, the second disc holder of outlet 210 is coupled in rotation to the second friction elements 202 at its upper end on the one hand, and on the other hand to a second outlet hub 220 at its lower end.

The second outlet disc holder 210 has on its outer radial periphery an axial elongation 207 which is provided with a toothing intended to cooperate with a complementary toothing on each second friction element 202, and more particularly at the inner radial periphery of each second friction element 202 of the second clutch 200. The second output disc carrier 210 is thus coupled in rotation by engagement with the second friction elements 202 of the second clutch 200.

At its lower radial end, the second outlet disc holder 210 is linked to the second outlet hub 220, preferably fixed together by welding or by riveting. Furthermore, an axial bearing 116 is interposed between the first outlet disc holder 110 and the second outlet disc holder 210 in order to be able to transmit an axial force between the two outlet disc holders 110, 210 which can rotate at different speeds when the first and second clutches 100, 200 are configured in a different configuration.

The second outlet hub 220 has radially inside the axial grooves arranged to cooperate with complementary grooves located on the second transmission shaft A2, so as to produce a rotation coupling.

Preferably, the second drive shaft A2 takes the form of a hollow cylinder inside which the first drive shaft Al can be inserted.

The second clutch 200 also includes elastic return means for automatically pushing the second actuator 330 back into the disengaged position. Preferably, the elastic return means are formed by elastic washers, such as corrugated washers of the "Onduflex TM" type. The elastic return washers are interposed axially between the second friction elements 201, 202. They are preferably arranged radially inside the first friction elements 201. Each elastic return washer is axially supported against the front radial face of a second friction element 202 and against the rear radial face of another second friction element 202 axially adjacent.

In a variant not shown, the return means of the second actuator 330 are formed by at least one compression spring.

The input disc holder 106 further comprises a so-called inner segment r which extends radially inwards from the clutch mechanism 10 and axially forwards. At its inner end, the inner segment 111 of the input disc carrier 106 is supported on a heel 118 bearing radially on a rolling bearing 113 arranged to support the radial load of the input disc carrier 106.

Radially, the rolling bearing 113 is integrally connected to the clutch support 500 located in an axial position intermediate between the actuation system 300 and the first and second output hubs 120, 220.

Axially, the position of the rolling bearing 113 is defined towards the front by a stop 114 · The stop 114 can preferably be a locking ring or stop ring. Furthermore, the stop 114 may preferably be housed in a groove produced on the peripheral surface of the clutch support 500.

More generally, the rolling bearing 113 is arranged radially between the clutch support 500 and the input disc carrier 106. Axially, the rolling bearing 113 is stopped axially by a stop ring 114 arranged on the side opposite to the axial force exerted by the first or second actuator 320, 330.

Advantageously, the rolling bearing 113 is a ball bearing with oblique contacts in order to be able to transmit both an axial force and a radial force. This axial force is, at the rolling bearing 113, taken up by the stop ring 114 · In fact, when the first or second actuator 320, 330 transmits an axial force to the first or second force member 105, 205 in order to configure the corresponding clutch 100, 200 in a clutched or disengaged configuration, an axial force is transmitted between a first end comprising said first or second actuator 320, 330 and a second end situated at the level of the shaft of the transmission Al , A2.

The casing 307 comprises at its rear end a cylindrical surface 3073 making it possible both to achieve centering with the transmission 400 and an axial plane support against a front face of said transmission. More particularly, an inner face 3075 of the cylindrical bearing surface 3073 of the casing 307 bears against a shoulder 412 oriented radially of the transmission 400. The diameter of the inner face 3075 is equal to or slightly greater than the diameter of the shoulder 412 of the transmission 400 in order to center the casing 307 on said transmission 400. In particular, the shoulder 412 of the transmission 400 here takes the form of second grooves 412 collaborating with first grooves 30705 formed on the inner face 3075 of the casing 307 and in order to simultaneously allow the clutch 10 to rotate against rotation 400 and / or angular indexing. Alternatively, centering could be carried out at the outside face of the cylindrical seat 3073 ·

Transmission 400 includes a front axial bore 473 complementary to the cylindrical seat

3073 of the casing 307 · As described above, the front axial bore 473 has dimensions and / or shapes complementary to those of the cylindrical seat 4073 of the casing in order to allow the coupling in rotation and / or the angular indexing of the mechanism clutch 10 on the transmission 400. A front face of the front axial bore 473 makes it possible to provide axial support for a rear face

3074 of the casing 307 · Radially inside the front axial bore 473, the transmission 400 comprises an internal cylindrical bearing surface 474 of which a front face 413 is not in contact with a rear face 3076 of the casing 307 when the mechanism d clutch 10 is assembled on the transmission 400.

FIGURES 1A, 2A, 3A on the one hand and IB, 2B and 3B on the other hand, illustrate respectively two different embodiments of clutch mechanisms 10, and more particularly embodiments for the axial locking devices of said mechanisms clutch 10 on transmission 400.

With reference to FIGURES 3A and 3B, each embodiment will now be described in more detail.

First embodiment

In the first embodiment illustrated in FIGURE 3A, the axial locking device 600 of the clutch mechanism 10 on the 4θθ transmission comprises:

- an axial locking member 610 located on the transmission 4θθ · More particularly, the axial locking member 610 is located on an axial extension surface 420 of the transmission 4θθ · The axial locking member 610 takes the form of a threaded bore passing right through said axial extension surface 420. The axial locking member is advantageously oriented radially. In other words, a generator of the axial locking member 610 is oriented perpendicular to the axis of rotation O of the clutch mechanism 10. Alternatively, the axial locking member 610 is oriented substantially perpendicular to the axis O, an angle formed by the generatrix of the axial locking member 610 with respect to a straight line normal to the axis of rotation O being between -30 ° and 3θ ° · The axial extension range 420 extends radially inside the clutches 100, 200 and outside the actuation system 300 · Axially, the axial extension range 420 is located behind the clutch mechanism 10, the first and second force transmission members 105, 205 being located in an axially intermediate position between a front end of the axial extension surface 420 and the clutches 100, 200;

An axial locking means 620 formed at an external end of the casing 307 of the actuating system 300. The axial locking means 620 here takes the form of a conical surface 3072 of axis O and oriented towards the front: the diameter of the rear end of the conical surface 3072 is greater than the diameter of the front end of said conical surface 3072. Thus, the conical surface 3072 is extended on the side of the transmission by a cylindrical seat 3073 whose diameter is slightly less than the diameter of an inner face of the axial extension range 420, so that the casing 307 can be inserted without contact in the axial extension range 420. On the side of the clutches 100, 200, the surface conical 3072 is extended by a cylindrical seat 3071 with a diameter less than the diameter of the cylindrical seat 3073 · Axially, the conical surface 3072 is located directly above the blocking member axial 610 when the clutch mechanism 10 is mounted on the transmission 400, that is to say when the rear face 3074 of the casing 307 is in axial abutment against the front face 411 of said transmission 400;

- an axial locking element 630 taking the form of a pressure screw. Once the clutch mechanism 10 has been assembled on the transmission 400, the axial blocking element 630 is screwed into the axial blocking blocking member 610, so that its lower end 631 is in contact with part of the surface conical 3072. The lower end 631 of the pressure screw is advantageously conical in order to increase the surface in contact with the conical surface 3072. In this position, the radial locking element exerts both an axial force and a force radial on the casing 307, oriented respectively inwards and towards the transmission 400. This advantageous configuration thus makes it possible to axially and radially lock the clutch mechanism 10 on the transmission 400. In this assembled position, the upper end 632 of the axial locking element 630 is advantageously in contact with an outer face 421 of the axial extension range 420 of the transmission 400. Alternat ively, in the assembled position, the upper end 632 of the axial locking element 630 may not be in contact with the external face 421 of the axial extension range 420 of the transmission 400. It is only necessary that the the lower end 631 of the axial locking element 630 is in contact with the conical surface 3072 forming the axial locking means 620.

During the assembly of the clutch mechanism 10 on the transmission 400, the axial locking element 630 is advantageously pre-mounted on the axial locking member 610 in such a way that its lower end 631 does not open at the inside the axial extension range 420 of the 4θθ transmission ·

The clutch mechanism 10 is then fitted onto the shafts of the transmission A1, A2 until it abuts said transmission. In particular, the clutch mechanism 10 is advantageously axially centered on the transmission 400 by means of the rear cylindrical bearing surface 3073 of the casing 307, collaborating with the front axial bore 473 complementary to the transmission 400.

Optionally, the clutch mechanism 10 is coupled in rotation with the transmission 400 via the first grooves 3075 located on the rear cylindrical bearing surface 3073 of the casing 307 and collaborating with second complementary grooves 412 - visible in FIGURE 4 - the transmission 400, the second groove 412 forming the shoulder 412 for centering the clutch mechanism 10 with the transmission 400. The rotation coupling makes it possible to catch up with the drag torque of the support bearing 113 and / or of the first and second bearings decoupling 140, 240.

Second embodiment

In the second embodiment illustrated in FIGURE 3B, the axial locking device 600 of the clutch mechanism 10 on the transmission 400 comprises:

- an axial locking member 610 located on the transmission 4θθ · More particularly, the axial locking member 610 is located on an axial extension surface 420 of the transmission 4θθ · The axial locking member 610 takes the form of a threaded bore passing right through said axial extension surface 420. The axial locking member is advantageously oriented radially. In other words, a generator of the axial locking member 610 is oriented perpendicular to the axis of rotation O of the clutch mechanism 10. Alternatively, the axial locking member 610 is oriented substantially perpendicular to the axis O, an angle formed by the generatrix of the axial locking member 610 with respect to a straight line normal to the axis of rotation O being between -30 ° and 3θ ° · The axial extension range 420 extends radially inside the clutches 100, 200 and outside the actuation system 3θθ · Axially, the axial extension range 420 is located behind the clutch mechanism 10, the first and second force transmission members 105, 205 being located in an axially intermediate position between a front end of the axial extension surface 420 and the clutches 100, 200;

- an axial locking means 620 formed at an outer end of the casing 3θ7 of the actuating system 3θθ · The axial locking means 620 here takes the form of a radial bore 3θ77-3θ79 delimited radially by a circular contour 3θ77 , 3078 and axially by a bottom surface 3079, here conical. Alternatively, the axial locking means 620 can be formed by a circumferential groove. The depth of the radial bore 30773079 is such that, when the clutch mechanism 10 is mounted on the transmission 400, that is to say when the rear face 3074 of the casing 307 is in axial support against the front face 411 of said transmission 400, the axial locking element 630 does not touch the bottom surface 3079 · Axially, the dimensions of the radial bore 3077-3079 are greater, slightly greater, or equal to the lateral dimensions of the locking element axial 630, so that said axial locking element 630 can be inserted with or without play in the radial bore 3077-3079 · Axially, the radial bore 3077-3079 is located directly above the member axial locking 610 when the clutch mechanism 10 is mounted on the transmission 400. The cylindrical bearing surface 3073 of the casing 307 here has a diameter less than the inside diameter of the axial extension bearing surface 420 of the transmission 400.

- an axial locking element 630 taking the form of a centering screw. Once the clutch mechanism 10 has been assembled on the transmission 400, the axial locking element 630 is screwed into the axial locking locking member 610, so that its lower end 631 is housed in the radial bore 3077- 3079 or in the circumferential throat. This advantageous configuration thus makes it possible to axially lock the clutch mechanism 10 on the transmission 400. In this assembled position, the upper end 632 of the axial locking element 630 is advantageously in contact with an external face 421 of the bearing axial extension 420 of the transmission 400. Alternatively, the axial locking element 630 may take the form of a pin fitted into the axial locking member 610, said axial locking member 610 then taking the form of a smooth bore.

During the assembly of the clutch mechanism 10 on the 4θθ transmission, the axial locking element 630 is advantageously pre-mounted on the axial locking member 610 in such a way that its lower end 631 does not open at the inside the axial extension range 420 of the 4θθ transmission ·

The clutch mechanism 10 is then fitted onto the shafts of the transmission until it abuts said transmission. In particular, the clutch mechanism 10 is advantageously axially centered on the 4θθ transmission via the rear cylindrical bearing surface 3073 of the casing 307, collaborating with the front axial bore 473 complementary to the transmission 400.

Optionally, the clutch mechanism 10 is angularly indexed around the axis of rotation O and relative to the transmission 400, by means of the first splines 3075 located on the rear cylindrical bearing surface 3073 of the casing 3θ7 and collaborating with second splines 412 complementary - visible in FIGURE 4 - of the transmission 400, the second grooves 412 forming the shoulder 412 for centering the clutch mechanism 10 with said transmission 400 · The angular indexing makes it possible on the one hand to facilitate the assembly of the clutch mechanism 10 on the transmission, by facilitating the radial alignment between the axial locking member 610 with the axial locking means 620, and on the other hand to catch up with the drag torque of the support bearing 113 and / or first and second decoupling stages 140, 240.

Example of realization of a transmission element

The F1GEIRE 4 illustrates a transmission element 400 in accordance with the second aspect of the invention, taking the form of a clutch bell.

The clutch housing has a generally circular shape and comprises several concentric bearing surfaces which extend successively axially towards the front, so as to form a cavity which, once the clutch mechanism 10 is assembled on the clutch housing, at least partially houses said clutch mechanism 10. For this purpose, an outer face of the clutch bell advantageously has a diameter greater than the outside diameter of the clutch mechanism 10.

Radially inside, the clutch housing includes a circular opening 4'4centre with axis O allowing the non-contacting transmission shafts A1, A2 not visible in FIGURE 4 to pass.

The clutch housing includes an inner cylindrical bearing surface 474 which extends axially forwards and which is delimited radially outwards by the second grooves 412 also forming the shoulder 412 for centering the clutch mechanism 10 with 4θθ transmission

Radially outward relative to the second grooves 412, the clutch housing comprises a front face 411 against which the rear face 3074 of the casing comes into axial abutment when the clutch mechanism 10 is assembled on the transmission 4θθ · The face front 411 is formed by a front axial bore 473 of the clutch housing, so that the front face 411 is situated behind the front face 413 of the internal cylindrical seat 474 ·

Radially outside the front axial bore 473, the clutch housing includes the axial extension surface 420 on which the axial locking member 610 of the axial locking device 600 of the clutch mechanism 10 is formed. the transmission 4θθ · The axial extension range 420 extends axially more forward relative to the different surfaces located radially inside and described above. The outer cylindrical face 421 of the axial extension bearing 420 comprises the axial locking member 610. The axial locking member 610 comprises at least one radial bore passing through said axial extending bearing 420. In the example illustrated on FIGURE 4, the axial locking member 610 is formed by three radial bores angularly regularly distributed around the axis O: two successive radial bores are separated by an angle of 120 ° between their respective axes.

Radially outward from the axial extension span 420, the clutch housing includes a radial extension span that extends radially outward.

In summary, the invention relates to an axial locking device 600 making it possible to axially lock a clutch mechanism 10 on a transmission 400 during their assembly. The assembly device comprises an axial locking member 610 located on the transmission 400, an axial locking means 620 formed at an outer end of the casing 307 of the actuation system 300 of the clutch mechanism 10 and an element axial locking device 630 collaborating with the axial locking member 610 and the axial locking means 620 to achieve the axial locking of the clutch mechanism 10 on the transmission 400.

The present invention extends both to the clutch mechanism 10 as such comprising the axial locking means 620, a transmission element 400 on which said clutch mechanism 10 is intended to be mounted, and a system transmission corresponding to the assembly of the clutch mechanism 10 on the transmission 40.

Of course, the invention is not limited to the examples which have just been described and numerous modifications 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 as long as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with one another.

Claims (21)

Claims 1. Clutch mechanism (lo) intended to be installed between an engine and a transmission (400) of a motor vehicle, said mechanism comprising: - a first clutch (100) and a second clutch (200) centered on an axis of rotation (O); - a clutch support (500) arranged to radially support the first (l00) and second (200) clutches; - an actuation system (300) comprising a casing (307) housing a first actuator (320) and a second actuator (33θ) arranged to engage or disengage the first (100) and second (200) clutches respectively; characterized in that the clutch mechanism (lo) comprises an axial locking means (620) formed on one face (3073) of an axial extension part of the casing (307), a straight line normal to said face (3073 ) being oriented radially, said axial locking means (620) constituting an axial locking device (6θθ) of the clutch mechanism (lo) on the transmission (400) · 2. Clutch mechanism (lo) according to the preceding claim, characterized in that the face (3073) defines an outer cylindrical surface of the casing (307), the axial locking means (620) taking the form of a removal of material from the face (3073) and delimited axially by at least one side. 3. Clutch mechanism (lo) according to any one of the preceding claims, characterized in that the axial locking means (620) is delimited axially by two sides, the removal of material having a transverse profile in U or in V. 4. Clutch mechanism (lo) according to any one of the preceding claims, characterized in that the casing (307) comprises a cylindrical surface (3073) making it possible to center around the axis of rotation (O). 5. Clutch mechanism (lo) according to any one of the preceding claims, characterized in that the casing (307) comprises first rotation coupling means (30705) capable of collaborating with second rotation coupling means ( 412) located on the transmission (400). 6. Clutch mechanism (ίο) according to any one of the preceding claims, characterized in that the casing (307) comprises first angular indexing means able to collaborate with second angular indexing means located on the transmission (400). 7. Clutch mechanism (lo) according to any one of claims 1 to 6, characterized in that the axial locking means (620) takes the form of a conical surface (3072) around the axis of rotation. (O). 8. Clutch mechanism (lo) according to any one of claims 1 to 6, characterized in that the axial locking means (620) takes the form of a radial bore (3θ77-3θ79) located on the part d axial extension of the housing (307) · 9. Clutch mechanism (lo) according to any one of claims 1 to 6, characterized in that the axial locking means (620) takes the form of a circumferential groove located on the axial extension part of the housing. (307) · 10. element of a transmission (4θθ) forming a cavity in which a clutch mechanism (lo) according to any one of the preceding claims is intended to be housed at least partially, characterized in that said element of the transmission ( 4θθ) includes: - a radial extension span (41θ); - an axial locking member (6ΐθ) of the clutch mechanism (lo), said axial locking member (6l0) constituting an axial locking device (6θθ) of the clutch mechanism (lo) on the transmission ( 400), said axial locking member (6ΐθ) taking the form of an axial extension surface (420) extending in the cavity, said axial extension surface (420) comprising a bore (6ΐθ) oriented radially. 11. transmission element (4θθ) according to the preceding claim, characterized in that the axial locking member (6ΐθ) is located radially inside the clutches (100, 200) of the clutch mechanism (lo). 12. Transmission system (l) for a motor vehicle comprising a clutch mechanism (lo) according to any one of claims 1 to 9 and in which: - the clutch mechanism (lo) is housed in the cavity of the transmission element (4θθ) according to any one of claims 10 or 11, said transmission element (4θθ) being integral with the transmission (4θθ ); ~ the axial locking device (6θθ) of the clutch mechanism (îo) on the transmission (400) comprises an axial locking element (630) housed in the bore of the axial locking member (6l0) located on the 'element of the transmission (400) and collaborating with the axial locking means (620) located on the axial extension part of the housing (307). 5 13- Transmission system (l) according to claim 12, characterized in that the axial locking element (630) takes the form of a pressure screw housed in the threaded bore of the axial locking member (6lO ) located on the transmission element (400). 14. Transmission system (l) according to claim 12, characterized in that the axial locking element (630) takes the form of a pin housed in the bore of the axial locking member (610) 10 located on the transmission element (400). 15. Transmission system according to any one of claims 12 to 14, characterized in that: ^- The first clutch (100) is coupled in rotation to a first output shaft (Al) of the transmission (400) via a first output disc holder (lio); 15 ~ the second clutch (200) is coupled in rotation to a second output shaft (A2) of the transmission (400) by means of a second output disc holder (210); ~ the first (100) and the second (200) clutches are alternately coupled in rotation to an input web (109), said input web (109) being coupled in rotation to an input shaft driven in rotation by at least one crankshaft, 20 16. Transmission system (l) according to any one of claims 12 to 15, characterized in that the axial locking element (630) of the axial locking device (600) exerts at least a radial force on the means of axial locking (620). 17. Transmission system (l) according to the preceding claim, characterized in that the axial locking element (630) of the axial locking device (600) also exerts an axial force on the means 25 axial locking (620). 18. Transmission system (l) according to any one of claims 12 to 17, characterized in that the axial extension range (420) of the transmission element (400) is located radially outside of the axial extension part of the casing (307) · 19- Transmission system (l) according to any one of claims 12 to 18, characterized in that the casing (307) comprises a cylindrical surface (3074) making it possible to carry out centering with respect to an additional front axial bore (437 ) of the transmission element (400). 5 20. A method of assembling a clutch mechanism (lo) according to any one of claims 1 to 9 on a transmission (400) and comprising the following steps: - assembly of the clutches (100, 200) on the clutch support (500) and / or the casing (307) of the actuation system (300), such an assembly forming the clutch mechanism (lo); 10 - engagement of the clutch mechanism (lo) on at least one of the shafts (Al, A2) of the transmission (400); - axial locking of the clutch mechanism (lo) on the transmission element (400) by means of an axial locking element (630) in the bore of the axial locking member (6l0) located on the transmission element (400) and collaborating with the blocking means 15 axial (620) located on the axial extension part of the housing (307) · 21. The assembly method according to the preceding claim, characterized in that the axial locking element (630) is pre-mounted on the transmission element (400) before the clutch mechanism (lo) is engaged. . 1/7