FR3083202A1 - ASSEMBLY TOOL FOR A TRANSMISSION SYSTEM AND METHOD FOR ASSEMBLY OF SUCH A TRANSMISSION SYSTEM - Google Patents

Abstract

The invention relates to an assembly tool (100) which makes it possible to place an axial stop member (60) on a transmission system (10), thereby making it possible to finalize the assembly of said transmission system (10). . To this end, the assembly tool (100) comprises a first device (100) and a second device (120) configured to be able to slide axially with respect to each other. More particularly, the first device (100) makes it possible to constrain radially inward the axial stop member (60) while the second device (120), during its axial displacement relative to said first device (110), allows to drive said axial stop member in axial translation along the transmission system (10), from a temporary housing for pre-mounting the axial stop member (60) on a torque outlet hub (30 ) from the transmission system (10), to an assembly housing (211) of the axial stop member (60) on a torque input element (20) of the transmission system (10). The invention also relates to a transmission system (10) and a method (1000) for positioning the axial stop member (60) on the transmission system (10) using such a tool. assembly (100).

Description

"ASSEMBLY TOOL FOR A TRANSMISSION SYSTEM AND METHOD FOR ASSEMBLING SUCH A TRANSMISSION SYSTEM"

TECHNICAL AREA

The technical context of the present invention is that of motor vehicle transmission systems. More particularly, the invention relates to a tool for assembling such transmission systems and to a method of assembling such transmission systems. In this context, the present invention also relates to an assembly formed by a transmission system and its assembly tool.

STATE OF THE PRIOR ART

In the state of the art, there is known a torque transmission device disposed between an internal combustion engine and a gearbox of a motor vehicle. Such a known actuation system comprises at least one clutch making it possible to selectively couple in rotation or decoupled in rotation a driving shaft linked to a crankshaft of the internal combustion engine to at least one transmission shaft linked to the gearbox. When the drive shaft is coupled in rotation to one of the at least one drive shaft, the at least one corresponding clutch is said to be in a engaged configuration, and when the drive shaft is decoupled in rotation to the one of the at least one drive shaft, the at least one corresponding clutch is said to be in a disengaged configuration. In order to configure the at least one clutch in one or the other configuration, said at least one clutch is actuated by an actuating member.

More particularly, the known transmission systems include numerous elements in order to allow the transmission of a torque between the engine shaft and one of the at least one transmission shaft of the gearbox. In such transmission systems, a retaining bearing supports radial forces from the at least one clutch relative to a torque input element of said transmission systems and configured to be coupled in rotation to the motor shaft. In order to guarantee the proper functioning of known transmission systems, an axial stop member is placed between the holding bearing and the torque input element in order to allow the transmission of axial forces during the control of the au minus a clutch by the actuating member.

Due to the large number of elements forming known transmission systems, the installation of the axial stop member between the holding bearing and the torque input element is a delicate operation during the assembly of said known transmission systems. Such positioning is often carried out manually and blind, the operator being unable to directly see either the location of the axial stop member during the positioning operation, or a housing in which it is intended to be housed to finalize the assembly of known transmission systems.

The object of the present invention is to propose a new assembly tool in order 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 facilitate the installation of the axial stop member during the assembly of a transmission system.

STATEMENT OF THE INVENTION

According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with an assembly tool for the installation of an axial stop member of a retaining bearing relative to an element of torque input of a torque transmission system in rotation about an axis of rotation, said assembly tool comprising (i) a first device configured to bear axially against a bearing face of the element torque input, and (ii) a second device configured to bear axially against a bearing face of the axial stop member, said second device being axially movable relative to said first device in order to be able to move the axial stop member into a housing of the transmission system.

The retaining bearing is advantageously carried by an output hub of the transmission system.

The bearing face of the torque input element is preferably a radial elongation face; and / or the bearing face of the axial stop member is preferably a radial elongation face.

According to the invention in accordance with its first aspect, the second device of the assembly tool is axially movable relative to the first device, so as to be able to generate an axial movement of the axial stop member relative to the torque input element of the transmission system. This advantageous configuration thus makes it possible to set up the axial stop member pre-assembled in the transmission system as far as the housing of said transmission system and in which it is intended to be housed to allow said transmission system to function correctly.

The invention in accordance with its first aspect thus makes it possible to facilitate the positioning of the axial stop member by providing an assembly tool which facilitates its handling.

The assembly tool according to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements can be taken alone or in combination:

- The first device comprises (i) a circular crown extending circumferentially around the axis of rotation, and (ii) a plurality of axial elongation spans which extend from the circular crown of said first device. The axial elongation spans of the first device extend projecting from the circular crown. They thus make it possible to define non-continuous contact areas with the bearing face of the torque input element. The circular crown of the first device facilitates centering of the assembly tool relative to the axis of rotation of the transmission system;

- The axial elongation surfaces of the first device are angularly regularly spaced with respect to the axis of rotation. By way of nonlimiting example, the first device advantageously comprises between 8 and 12 axial elongation spans, and an angle between two adjacent axial elongation spans is preferably between 30 and 45 ° relative to the axis of rotation of the transmission system. This advantageous configuration makes it possible in particular to improve the positioning of the assembly tool on the transmission system and to facilitate its centering with respect to the axis of rotation of said transmission system;

- The axial elongation surfaces of the first device all extend along the same axial distance from the circular ring of said first device. In other words, the terminal ends of each axial elongation span of the first device are all located at the same axial distance from the circular crown of said first device: they collectively form a single plane advantageously perpendicular to the axis of rotation of the transmission system;

- At a free end of the axial extension spans of the first device, at least part of said axial extension spans comprises an axial retaining element of the axial stop member. In other words, one face of the axial retaining element located on the side of the crown of the first device is intended to be supported directly or with minimal play - that is to say of the order of a few tenths of a millimeter against the axial stop member of the transmission system. Thus, when the assembly tool is placed on the transmission system, the free end of the axial elongation bearing surfaces of the first device is in axial abutment against the bearing face of the entry element of torque, and, simultaneously, the face of the axial retaining element located on the side of the crown of the first device is in abutment against the axial stop member of said transmission system. This configuration makes it possible to prevent the axial stop member from tilting away from the crown of the first device when the assembly tool is put in place on the transmission system;

- The axial retaining element takes the form of a rib which extends radially projecting relative to the corresponding axial elongation span of the first device

- The rib extends radially inward relative to the corresponding axial elongation span of the first device. One face of the rib located on the side of the crown of the first device is thus intended to be pressed against the axial stop member of the transmission system;

- The second device comprises (i) a circular crown extending circumferentially around the axis of rotation, and (ii) a plurality of axial elongation spans which extend from the circular crown of said second device. The axial elongation spans of the second device extend from the circular crown. They thus make it possible to define non-continuous contact areas with the bearing face of the axial stop member. The circular crown of the second device facilitates centering of the assembly tool relative to the axis of rotation of the transmission system;

- The axial elongation surfaces of the second device are angularly regularly spaced with respect to the axis of rotation. By way of nonlimiting example, the second device advantageously comprises between 8 and 12 spans of axial elongation, and an angle between two adjacent spans of axial elongation is preferably between 30 and 45 ° relative to the axis of rotation of the transmission system. This advantageous configuration makes it possible in particular to improve the positioning of the axial stop member on the transmission system and to prevent said axial stop member from tilting relative to the axis of rotation of said transmission system. ;

- the first and the second device include an equal number of axial elongation spans;

- the axial elongation surfaces of the second device all extend along the same axial distance from the circular ring of said second device. In other words, the terminal ends of each axial elongation span of the second device are all located at the same axial distance from the circular ring of said second device: they collectively form a single plane advantageously perpendicular to the axis of rotation of the transmission system;

- The axial length of the axial elongation spans of the second device is greater than the axial length of the axial elongation spans of the first device;

- The axial extension spans of the first device are angularly alternated with the axial extension spans of the second device, each axial extension span of said first device being directly angularly adjacent with an axial extension span of said second device;

- The axial extension surfaces of the first device are located at the same radial distance from the axis of rotation as the axial extension surfaces of the second device. Alternatively, the axial elongation spans of the first device are located radially inside the axial elongation spans of the second device. Alternatively again, the axial extension spans of the first device are located radially outside the axial extension spans of the second device;

- The axial extension spans of the first device and / or the axial extension spans of the second device are elastically deformable in a radial direction relative to the axis of rotation of the transmission system;

- The first device comprises a cylindrical bearing surface of axial elongation which collaborates with the circular crown of the second device, said circular crown being in radial support against said cylindrical bearing. Alternatively, the second device comprises a cylindrical bearing surface of axial elongation which collaborates with the circular crown of the first device, said circular crown being in radial abutment against said cylindrical bearing. This advantageous configuration enables centering of the first device relative to the second device, in particular relatively relative to the axis of rotation of the transmission system;

- The assembly tool according to the first aspect of the invention comprises means for axially guiding the first device with respect to the second device, said first device comprising first axial guiding means and said second device comprising second guiding means axial, said second axial guide means being complementary to the first axial guide means and collaborating with said first axial guide means by complementary shapes to allow relative axial movement between said first device and said second device. This advantageous configuration makes it possible to facilitate the relative axial movement between the first device and the second device, leading to better positioning of the axial stop member on the transmission system and / or to ease of positioning;

- The first and / or the second device are made of metal, and in particular of an aluminum alloy or comprising steel;

- The assembly tool according to the first aspect of the invention is advantageously produced by molding.

According to a second aspect of the invention, an assembly is proposed comprising:

- a rotation axis transmission system and comprising:

o a torque input element configured to be coupled in rotation to a crankshaft of an internal combustion engine;

o at least one torque output hub configured to be coupled in rotation to at least one input shaft of a gearbox and / or to a rotary electrical machine;

o at least one clutch configured to be able to selectively couple the torque input element in rotation to at least one torque output hub;

o an actuator for at least one clutch, said actuator for configuring the at least one clutch in a configuration between:

a so-called engaged configuration in which at least one of the torque output hubs is coupled in rotation with the torque input element; and a so-called disengaged configuration in which at least one of the torque output hubs is decoupled in rotation from the torque input element;

o an axial stop member of a retaining bearing relative to the torque input element, said retaining bearing being carried by the at least one torque output hub;

- An assembly tool according to the first aspect of the invention or according to any one of its improvements, said assembly tool being engaged with at least one torque output hub.

The assembly according to the second aspect of the invention thus covers the temporary or final assembly of the assembly tool according to the first aspect of the invention with the transmission system. Indeed, according to a first variant of use, the assembly tool according to the first aspect of the invention can be temporarily assembled on the transmission system in order to set up the axial stop member, said tool 'assembly then being separated from the transmission system when the axial stop member is housed in its final housing of said transmission system. According to a second variant of use, the assembly tool is held integral with the transmission system even when the axial stop member is put in place in its housing.

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

- The axial stop member is preferably an elastic ring configured to be able to be elastically deformed radially;

- the axial extension surfaces of the first device and / or the axial extension surfaces of the second device of the assembly tool are housed in slots of axial extension located on a circumferential surface of the at least one hub torque output from the transmission system. Therefore, when the assembly tool is actuated to place the axial stop member in its housing on the transmission system - that is to say when the second device is moved axially relative to the first device - the axial elongation ranges of the second device slide axially between the slots of the at least one torque output hub of said transmission system;

- At least part of the axial elongation spans of the first device and / or at least part of the axial elongation spans of the second device of the assembly tool are in radial support against the circumferential surface of the at least a torque output hub of the transmission system;

- The transmission system is of the wet type, a hydraulic fluid circulating in the transmission system in particular to lubricate and / or cool the at least one clutch during its operation;

- The transmission system comprises two clutches in an axial configuration relative to each other, a first clutch being located in front of a second clutch. Alternatively, the transmission system includes two clutches in a radial configuration relative to each other, a first clutch being located radially on the outside relative to a second clutch.

According to a third aspect of the invention, there is provided a method of placing an axial stop member into a housing of a transmission system according to the second aspect of the invention or according to any one of its improvements, said implementation process comprising the following steps:

- A first step of inserting the axial stop member into a temporary housing of the at least one torque outlet hub;

- A second step of engaging the assembly tool according to the first aspect of the invention or according to any of its improvements against a bearing face of said at least one torque outlet hub, at least one part of the axial extension spans of the first device of the assembly tool and / or at least a part of the axial extension spans of the second device of the assembly tool partially engaging in elongation slots axial carried by said at least one torque outlet hub on its outer periphery;

a third step of axially pressing at least a portion of the axial elongation bearing surfaces of the first device of the assembly tool against a face of the torque input element of the transmission system, and placing in radial abutment of the axial stop member against at least one part of the axial elongation surfaces of the first device of the assembly tool;

a fourth step of axial displacement of the second device of the assembly tool relative to the first device, in order to axially support at least a portion of the axial elongation spans of the second device of the assembly tool against a face of the axial stop member;

a fifth step of axial displacement of the second device of the assembly tool relative to the first device, in order to axially move the axial stop member relative to the at least one torque output hub, up to a assembly housing of said axial stop member, said assembly housing being located on the torque input element of the transmission system;

- a sixth step of inserting the axial stop member into the assembly housing.

The positioning method according to the third aspect of the invention makes it possible to facilitate the positioning of the axial stop member on the transmission system, and more particularly to migrate said axial stop member from a configuration temporary in which it does not achieve the expected axial stop towards a final configuration in which it achieves the expected axial stop between the holding bearing and the at least one torque output hub.

During the first step of the positioning process according to the third aspect of the invention, the axial stop member is first inserted in the temporary housing provided on the transmission system, and in particular at the level of the minus a torque output hub. More particularly, the axial stop member is inserted axially on the corresponding torque outlet hub, that is to say that the axial stop member is fitted on a cylindrical seat of axial elongation of said hub. torque output corresponding to its temporary housing then forming the temporary configuration mentioned above. In this temporary configuration, the axial stop member is advantageously placed in axial abutment against a shoulder of the at least one torque outlet hub.

During the second step of the positioning process according to the third aspect of the invention, the assembly tool is simultaneously engaged against the bearing face of the corresponding torque output hub and between at least part of the slots located on the radially outer periphery of said torque outlet hub. This second step makes it possible to position the assembly tool in a configuration which will allow it during the subsequent steps to set up the axial stop member on the transmission system and to configure said axial stop member in its final configuration mentioned above. During the second step, the assembly tool according to the first aspect of the invention is centered with respect to the transmission system and with respect to its axis of rotation. Possibly or additionally, during the second step, the assembly tool is angularly indexed with respect to the transmission system - and more specifically with respect to the at least one torque outlet hub - relative to the axis of rotation to allow angular alignment of the axial elongation spans of the first device and the second device relative to the slots of the corresponding torque outlet hub.

During the third step of the positioning process according to the third aspect of the invention, the assembly tool is placed in axial support against the bearing face of the torque input element, at least a part of the axial elongation surfaces of the first device of the assembly tool also being in radial support against the axial stop member in order to deform it radially inwards. More particularly, this step advantageously makes it possible to reduce the outside diameter of the axial stop member in order to facilitate its radial displacement during the subsequent steps. It is the insertion of the axial elongation surfaces of the first device of the assembly tool which, when they reach the level of the axial stop member pre-assembled on the transmission system in its temporary housing, exert an inwardly directed radial force on an outer radial end of said axial stop member. In particular, a radially inner face of the axial elongation surfaces of the first device of the assembly tool achieves such a radial support on an outer peripheral surface of the axial stop member, thus causing its elastic deformation.

During the fourth step of the positioning process according to the third aspect of the invention, the axial elongation surfaces of the second device of the assembly tool are moved axially in the direction of the torque input element of the transmission system until it comes into axial abutment against the bearing face of the axial stop member. Optionally, the fourth step can be performed before the third step.

During the fifth step of the positioning method in accordance with the third aspect of the invention, the previous axial displacement of the axial elongation spans of the second device of the assembly tool is continued in order to axially displace the member axial stop to its assembly housing. During the sixth step of the positioning process according to the third aspect of the invention, the axial stop member is inserted into the assembly housing. The assembly housing advantageously takes the form of a circumferential groove relative to the axis of rotation of the transmission system, and open radially inwards. The assembly housing is located axially beyond the free end of the axial extension surfaces of the first device of the assembly tool. Thus, when the axial stop member reaches the level of the groove, it is no longer radially constrained by the axial elongation surfaces of the first device of the assembly tool. Subsequently, the axial stop member returns to its initial configuration, before radial stress by the axial extension surfaces of the first device of the assembly tool, and an outside diameter of said axial stop member increases so that that said axial stop member is housed in the groove stably.

This advantageous configuration allows, when the axial stop member is housed in its assembly housing, to achieve an axial stop of the retaining bearing relative to the torque input element of the transmission system, said housing d 'assembly being located axially close to, or even touching, said retaining bearing.

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

DESCRIPTION OF THE FIGURES

Other characteristics and advantages of the invention will become apparent 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 :

- FIGURE 1 illustrates a perspective view of an exemplary embodiment of the assembly tool according to the first aspect of the invention;

- FIGURES 2 to 5 illustrate the stages of assembly of an exemplary embodiment of a transmission system;

- FIGURE 6 illustrates the different stages of the process for installing an axial stop member in accordance with the third 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 FIGURE 1, an exemplary embodiment of the assembly tool 100 in accordance with the first aspect of the invention is described. Such an assembly tool 100 includes:

- A first device 110 configured to be in axial abutment against a bearing face of the torque input element 20 not shown in FIGURE 1; and

- A second device 120 configured to bear axially against a bearing face of the axial stop member 60 not shown in FIGURE 1, said second device 120 being able to move axially parallel to an axis O of the tool assembly 100 and relative to said first device 110.

More particularly, the first device 110 comprises a circular crown 111 which extends circumferentially around the axis O, and a plurality of axial elongation surfaces 112 which all extend from the circular crown 111 of said first device 110 and parallel to said axis O.

In the example illustrated in FIGURE 1, the circular crown 111 of the first device 110 is extended by a cylindrical bearing surface 113 of axial elongation and which extends axially along the axis O in a direction opposite to the bearing surfaces of axial extension 112 of the first device 110. The cylindrical bearing surface 113 of the first device 110 is intended to collaborate with the second device 120 in order to center the first device 110 relative to the second device 120, relatively relative to the axis O of the assembly tool

100.

The axial elongation surfaces 112 of the first device 110 extend projecting from the circular crown 111, in an axial direction opposite to the cylindrical surface 113. Each axial elongation surface 112 takes the form of an angular sector of a cylindrical bearing surface of axis O. In other words, radially inner faces 1123 and / or radially outer faces 1124 of the axial elongation bearing surfaces 112 are curved and have, in a plane perpendicular to the axis O, a radius of curvature not zero. This advantageous configuration makes it easier to center the first device 110 of the assembly tool 100 relative to the transmission system 10, as will be described later. Alternatively, the radially inner faces 1123 and / or the radially outer faces 1124 of the axial elongation spans 112 may be planar.

Collectively, the axial extension spans 112 of the first device 110 of the assembly tool 100 make it possible to define non-continuous contact zones with a bearing face of the transmission system 10, and more particularly with the element d torque input 20 of said transmission system 10, as will be described with reference to FIGURES 2 to 5.

Similarly, the second device 120 comprises a circular crown 121 which extends circumferentially around the axis O, and a plurality of axial elongation surfaces 122 which all extend from the circular crown 121 of said second device 120 and parallel to said axis O.

The axial elongation surfaces 122 of the second device 120 extend projecting from the circular crown 121, in the same axial direction as the axial elongation surfaces 112 of the first device 110. Each axial extension reach 122 takes the form of an angular sector of a cylindrical bearing of axis O. In other words, radially inner faces 1223 and / or radially outer faces 1224 of the axial elongation bearing surfaces 122 of the second device 120 are curved and have, in a plane perpendicular to the axis O, a radius of curvature not zero. This advantageous configuration makes it easier to center the second device 120 of the assembly tool 100 relative to the transmission system 10, as will be described later. Alternatively, the radially inner faces 1223 and / or the radially outer faces 1224 of the axial elongation surfaces 112 of the second device 120 may be planar.

Collectively, the axial extension spans 122 of the second device 120 of the assembly tool 100 make it possible to define non-continuous contact zones with a bearing face of the transmission system 10, and more particularly with the element d torque input 20 of said transmission system 10, as will be described with reference to FIGURES 2 to 5.

In the example illustrated in FIGURE 1, the axial elongation spans 112 of the first device 110 are situated at the same radial distance from the axis O as the axial elongation spans 122 of the second device 120. For this purpose, the circular ring 111 of the first device 120 comprises, between two axially adjacent axial elongation spans 112, a depression 1111 allowing the corresponding axial extension spans 122 of the second device 120 to be inserted axially through said circular ring 111 of the first device 110. In other words, the circular crown 111 of the first device 110 comprises a plurality of depressions 1111, each depression 1111 being located between two axial elongation spans 112 directly adjacent to said first device 110. Each depression 1111 has a width angular slightly greater than a width of the axial extension spans 122 of the second device 120 me.

The axial elongation spans 112 of the first device 110 are angularly regularly spaced with respect to the axis O. Similarly, the axial elongation spines 122 of the second device 120 are angularly regularly spaced with respect to the axis O.

In the example illustrated in FIGURE 1, the first device 110 comprises eleven axial extension spans 112, and an angle between two adjacent axial extension spans 112 is between 16 and 17 ° relative to the axis O. The second device 120 comprises an equal number of axial extension spans 122 than the first device 110. More particularly, the second device 120 comprises eleven axial extension spans 122, and an angle between two adjacent axial extension spines 122 is between 16 and 17 ° with respect to the O axis.

An angle between an axial extension door 112 of the first device 110 and an axial extension door 122 of the second device 120 angularly directly adjacent is preferably between 8 and 9 °. More generally, each axial extension range 122 of the second device 120 is advantageously angularly centered between two axial extension ranges 112 adjacent to one another on the first device 110 of the assembly tool 100.

The axial extension surfaces 112 of the first device 110 all extend at the same axial distance from the circular ring 111 of said first device 110, so that free ends 1121 of the axial extension surfaces 112 of the first device 110 collectively form the same plane, preferably perpendicular to the axis O. Similarly, the axial elongation surfaces 122 of the second device 120 all extend at the same axial distance from the circular ring 121 of said second device 120, so that free ends 1221 of the axial extension spans 122 of the second device 120 collectively form the same plane, preferably perpendicular to the axis O. Advantageously, the plane formed by all of the free ends 1121 of the axial extension spans 112 of the first device 110 is parallel to the plane formed by all of the free ends 1221 of the ports axial extension 122 of the second device 120.

An axial length of the axial elongation surfaces 112 of the first device 110 is less than an axial length of the axial extension surfaces 122 of the second device 120.

At their free end 1121, the axial elongation bearing surfaces 112 of the first device 110 comprise an axial retaining element 1122 of the axial stop member. The axial retaining element 1122 is located on the radially inner face 1123 of each axial elongation span 112 of the first device 110 and makes it possible to temporarily hold in position the axial stop member of the transmission system during its assembly, as it will be described with reference to FIGURES 2 to 5.

More particularly, in the embodiment illustrated in FIGURE 1, the axial retaining element 1122 takes the form of a rib which extends radially projecting and inwards relative to the internal face 1123 of the corresponding axial extension 112 of the first device 110. In a plane perpendicular to the axis O, the axial retaining elements 1122 of the axial extension 112 of the first device 110 advantageously all extend along the same circular profile of centers the axis O.

According to the invention according to its first aspect, the second device 120 of the assembly tool 100 is axially movable relative to the first device 110 of said assembly tool 100, in order to allow a positioning of the member axial stop on the transmission system, as will be described with reference to FIGS. 2 to 5. For this purpose, the first device 110 comprises first axial guide means 1131 and the second device 120 comprises second axial guide means 1231 The second axial guide means 1231 are complementary to the first axial guide means 1131 and collaborate together by complementarity of shapes in order to allow relative axial movement between the first device 110 and the second device 120 along the axis O.

In the example illustrated in FIGURE 1, the first guide means 1131 take the form of rectangular openings produced in the cylindrical surface 113 of the first device 110. In the embodiment illustrated in FIGURE 1, the first device 110 comprises twelve rectangular openings, angularly regularly spaced with respect to the axis O.

The second guide means 1231 take the form of prismatic protrusions which protrude from a radially outer face of the circular crown 121 of the second device 120, so that the prismatic protrusions of said second device 120 are inserted into the rectangular openings of the first device 110.

FIGURES 2 to 5 illustrate an assembly 1 in accordance with the second aspect of the invention and comprising a transmission system 10 and an assembly tool 100 as described above. Firstly, the transmission system 10 will be described, before detailing various stages of its assembly. Such a transmission system 10 comprises:

a torque input element 20 configured to be rotatably coupled to a drive shaft of an internal combustion engine by fixing means not shown in FIGURES 2 to 5, such as for example by a plurality of screws angularly distributed around the axis of rotation O of the transmission system 10;

- At least one torque output hub 30 configured to be coupled in rotation to at least one input shaft of a gearbox and / or to a rotary electric machine not shown in FIGURES 2 to 5;

- At least one clutch 40 configured to be able to selectively couple the torque input element 20 to rotate at least one torque output hub 30;

- an actuating member 50 of the at least one clutch 40;

- An axial stop member 60 of a holding bearing 70 relative to the torque input element 20, said holding bearing 70 being carried by the at least one torque outlet hub 30.

The torque output hub 30 is coupled in rotation to the at least one corresponding clutch 40 via a torque output element 80. The torque output element 80 is coupled in rotation to the output hub of torque 30 by a gear system 81 located at its inner radial end and collaborating with slots of axial elongation 311 located on a circumferential surface 31 of the at least one torque output hub 30 of the transmission system 10.

The at least one clutch 40 selectively and frictionally couples the torque input elements 20 and torque output elements 80.

A device 90 making it possible to filter sudden variations in the frequency of rotation of the motor shaft and the acyclisms of the internal combustion engine is inserted between the torque input element 20 and the torque output element 80. More particularly , the device 90 takes the form of a double damping flywheel.

Each clutch 40 of the transmission system 10 comprises first friction elements 41 coupled in rotation with the torque input element 20, and second friction elements 42 coupled in rotation with the torque output element 80.

The actuator 50 makes it possible to configure the at least one clutch 40 in a configuration between:

- A so-called engaged configuration in which at least one of the torque output hubs 30 is coupled in rotation with the torque input element 20; and

- a so-called disengaged configuration in which at least one of the torque output hubs 30 is decoupled in rotation from the torque input element 20.

More particularly, the actuator 50 is configured to selectively generate an axial force substantially parallel to the axis of rotation O making it possible to configure the clutch 40 to which it is connected in its engaged configuration. To this end, the actuating member 50 is connected to a force transmission member which - under the effect of the force generated by the actuating member 50, decompresses the first friction elements 41 of the second elements friction 42 of the corresponding clutch 40. Consequently, no frictional coupling is established between the first friction elements 41 and the second friction elements 42, leading to decoupling in rotation the torque input element 20 to the torque output element 80. L ' clutch 40 is said to be “normally closed”. Alternatively, the clutch 40 can be "normally open".

When the actuator 50 does not generate the axial force, then the corresponding clutch 40 is configured in its engaged configuration. That is to say that the first friction elements 41 and the second friction elements 42 are coupled in rotation, leading to the coupling in rotation of the torque input element 20 of the torque output element 80.

The transmission system 10 is held radially by the retaining bearing 70 carried by a cylindrical seat 33 of the torque outlet hub 30.

In order to transmit the axial forces necessary for the operation of the transmission system 10, the retaining bearing 70 is locked axially, on a first side, by an axial stop ring 65 located axially between the retaining bearing 70 and the clutch. 40 and, on a second side, by a shoulder 331 of the cylindrical bearing surface 33 of the torque outlet hub 30 forming a stop for said retaining bearing 70.

Radial forces from the transmission system 10 on the torque output hub 30 are thus supported by the retaining bearing 70 and by means of the torque input element 20. More particularly, the input element of torque 20 comprises at its inner radial end an axial elongation surface 21 of which an inner face is in radial abutment against an outer ring of the retaining bearing 70.

In order to optimize the axial blocking of the retaining bearing 70, it is necessary to make an axial stop at its outer ring 71. This axial stop is achieved by the axial stop member 60 including an object of the invention is to provide for easy installation in the transmission system 10 and which will now be described with reference to FIGURES 2 to 5.

Once in place, the axial stop member 60 is housed in its assembly housing 211 which takes the form of a circumferential groove around the axis of rotation O. The circumferential groove is oriented radially towards the interior, and it is located on a radially interior face of the axial elongation surface 21 of the torque input element. Axially, the circumferential groove is located such that, when the transmission system 10 is assembled, one side of the circumferential groove is coplanar with one face of the outer ring 71 of the retaining bearing 70.

As shown in FIGURE 2, during a first assembly step, the axial stop member 60 is fitted onto the torque outlet hub 30 at a temporary housing 32. The temporary housing 32 is at least in part formed by an axial bearing face 34 of the torque outlet hub 30, said axial bearing face 34 being preferably perpendicular to the axis of rotation O.

During the first step, the torque outlet hub 30 is not yet inserted into the transmission system 10. The holding bearing 70 is mounted on the cylindrical surface 33 of the torque outlet hub 30, and locked axially towards the transmission system 10 through the axial stop ring 65 housed in a circumferential groove 332 located on a radially outer face of the cylindrical surface 33.

During the first step, the assembly tool 100 as described above is mounted on the torque outlet hub 30. In particular, the first device 110 is engaged through slots of axial extension 311 of the hub torque output 30. More particularly, the free ends 1121 of the axial elongation surfaces 112 of the first device 110 are located radially outside the axial stop member 60, exerting on it a radial force oriented towards the inside and leading to reduce its outside diameter relative to a natural position of said axial stop member 60. In order to facilitate its axial holding, the axial retaining elements 1122 of the axial elongation spans 112 of the first device 110 press the member axial stop 60 against the axial bearing face 34 of the torque outlet hub 30. The second device 120 is also engaged through elongation slots n axial 311 of the torque outlet hub 30. More particularly, the free ends 1221 of the axial elongation surfaces 122 of the second device 120 are pressed against an axial elongation face of the axial stop member 60.

During a second step illustrated in FIGURE 3, the torque outlet hub 30 and the assembly tool 100 according to the first aspect of the invention are inserted into the transmission system 10 until the outer ring 71 of the retaining bearing 70 is in axial abutment against an inner shoulder 212 of the axial elongation range 20.

During a third step illustrated in FIGURE 4, the second device 120 of the assembly tool 100 is moved axially in the direction of the transmission system 10 and relatively relative to the first device 110, so as to push axially l axial stop member 60 from its temporary housing 32 towards its assembly housing 211. During this axial translation step of the axial stop member 60, said axial stop member is constrained radially to the outside by the axial elongation surfaces 112 of the first device 110 of the assembly tool 100 which always exert the constrictive force as described above. Simultaneously with this constrictive force exerted on the outside diameter of the axial stop member 60, the latter is pushed by the axial elongation surfaces 122 of the second device 120 of the assembly tool 100.

As illustrated in FIGURE 4, when the axial stop member 60 arrives at its assembly housing 211, that is to say when said axial stop member comes into abutment against a face of the retaining bearing 70, then it is no longer constrained radially from the outside by the axial elongation surfaces 112 of the first device 110 of the assembly tool, and said axial stop member is free to return to its position natural. Thus, it extends and is automatically housed in the circumferential groove which forms the assembly housing 211 of the axial stop member 60.

FIGURE 5 illustrates the transmission system 10 in its assembled configuration, comparable to the situation described in FIGURE 4. In addition, the assembly tool 100 is retracted and disconnected from the transmission system 10. The stop member axial 60 is housed in its assembly housing and, in the absence of radial stress exerted by the assembly tool 100, it returns to its natural position: its outside diameter extends so that the member d axial stop is housed at the bottom of its assembly housing 211, as visible in FIGURE

5.

In accordance with the third aspect of the invention, FIGURE 6 illustrates a version of the method 1000 for positioning the axial stop member 60 into its assembly housing 211 of the transmission system 10 in accordance with the second aspect of the invention as described above. In the version illustrated in FIGURE 6, the method 1000 of implementation comprises the following steps:

- Insertion 1001 of the axial stop member 60 into the temporary housing 32 of the torque outlet hub 30;

engagement 1002 of the assembly tool 100 against a bearing face of said torque outlet hub 30, the axial elongation spans 112 of the first device 110 of the assembly tool 100 and / or the spans d axial extension 122 of the second device 120 of the assembly tool 100 partially engaging in slots 311 of axial extension carried by said torque outlet hub 30 on its outer periphery 31;

- Axial bearing 1003 of the axial elongation spans 112 of the first device 110 of the assembly tool 100 against a radial elongation face of the torque input element 20 of the transmission system 10, and placing in radial support of the axial stop member 60 against the axial elongation surfaces 112 of the first device 110 of said assembly tool 100;

- axial displacement 1004 of the second device 120 of the assembly tool

100 relative to the first device 110, in order to axially support the axial elongation surfaces 122 of the second device 120 of the assembly tool 100 against a radial elongation face of the axial stop member 60;

- axial displacement 1005 of the second device 120 of the assembly tool

100 relative to the first device 110, in order to axially move the axial stop member 60 relative to the torque outlet hub 30, up to its assembly housing 211 on the torque inlet member 20 of the transmission 10;

- insertion 1006 of the axial stop member 60 into the assembly housing 211.

In summary, the invention relates to an assembly tool 100 which makes it possible to set up an axial stop member 60 on a transmission system 10, thus making it possible to finalize the assembly of said transmission system 10. To this end, the assembly tool 100 comprises a first device 100 and a second device 120 configured to be able to slide axially with respect to each other. More particularly, the first device 100 makes it possible to constrain radially inward the axial stop member 60 while the second device 120, during its axial displacement relative to said first device 110, drives said stop member axially in translation axial along the transmission system 10, from a temporary housing for pre-mounting the axial stop member 60 on a torque outlet hub 30 of the transmission system 10, to an assembly housing 211 of the axial stop member 60 on a torque input element 20 of the transmission system 10.

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 one another 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 (10)

1. Assembly tool (100) for the installation of an axial stop member of a retaining bearing with respect to a torque input element of a torque transmission system rotating around d an axis of rotation (O), said retaining bearing being carried by an outlet hub of said transmission system, said assembly tool (100) comprising: - A first device (110) configured to bear axially against a bearing face of the torque input element; - A second device (120) configured to bear axially against a bearing face of the axial stop member, said second device (120) being axially movable relative to said first device (110) so as to be able to move the axial stop member into a housing of the transmission system. 2. Assembly tool (100) according to the preceding claim, in which the first device (110) comprises: - circular crown (111) extending circumferentially around the axis of rotation O; - A plurality of axial elongation surfaces (112) which extend from the circular crown (111) of said first device (110). 3. Assembly tool (100) according to the preceding claim, wherein, at a free end (1121) of the axial elongation spans (112) of the first device (110), at least a portion of said spans d the axial extension (112) comprises an axial retaining element (1122) of the axial stop member. 4. Assembly tool (100) according to any one of the preceding claims, in which the second device (120) comprises: - circular crown (121) extending circumferentially around the axis of rotation O; - A plurality of axial elongation surfaces (122) which extend from the circular ring (121) of said second device (120). 5. assembly tool (100) according to the preceding claim taken in combination with one of claims 2 or 3, wherein the axial extension spans (112) of the first device (110) are angularly alternated with the spans d axial extension (122) of the second device (120), each axial extension reach (112) of said first device (110) being directly angularly adjacent with an axial extension reach (122) of said second device (120). 6. Assembly tool (100) according to any one of the preceding claims, in which the first device (110) comprises a cylindrical surface (113) of axial elongation which collaborates with the circular crown (121) of the second device ( 120), said circular crown (121) being in radial abutment against said cylindrical bearing surface (113). 7. Assembly tool (100) according to any one of the preceding claims, in which the assembly tool (100) comprises means for guiding (1131, 1231) axial of the first device (110) relative to the second. device (120), said first device (110) comprising first axial guide means (1131) and said second device (120) comprising second axial guide means (1231), said second axial guide means (1231) being complementary first axial guide means (1131) and collaborating with said first axial guide means (1131) by complementary shapes to allow relative axial movement between said first device (110) and said second device (120). 8. Set (1) comprising: - a transmission system (10) of axis of rotation (O) and comprising: o a torque input element (20) configured to be coupled in rotation to a crankshaft of an internal combustion engine; o at least one torque output hub (30) configured to be coupled in rotation to at least one input shaft of a gearbox and / or to a rotary electrical machine; o at least one clutch (40) configured to be able to selectively couple the torque input element (20) in rotation to at least one torque output hub (30); an actuating member (50) of the at least one clutch (40), said actuating member (50) making it possible to configure the at least one clutch (40) in a configuration comprised between: a so-called engaged configuration in which at least one of the torque output hubs (30) is coupled in rotation with the torque input element (20); and a so-called disengaged configuration in which at least one of the torque output hubs (30) is decoupled in rotation from the torque input element (20); o an axial stop member (60) of a holding bearing (70) relative to the torque input element (20), said holding bearing (70) being carried by the at least one hub torque output (30); - an assembly tool (100) according to any one of the preceding claims, said assembly tool (100) being engaged with at least one torque output hub (30). 9. assembly (1) according to the preceding claim taken in combination with the assembly tool (100) according to claims 2 and 4, wherein the axial elongation surfaces (112) of the first device (110) and / or the axial extension surfaces (122) of the second device (120) of the assembly tool (100) are housed in slots (311) of axial extension situated on a circumferential surface (31) of at least a torque output hub (30) of the transmission system (10). 10. Method (1000) for fitting an axial stop member (60) into a housing (211) of a transmission system (10) according to any one of claims 8 or 9, said method (1000) of implementation comprising the following steps: - insertion (1001) of the axial stop member (70) in a temporary housing (32) of the at least one torque outlet hub (30); - engagement (1002) of the assembly tool (100) against a bearing face of said at least one torque outlet hub (30), at least part of the axial elongation surfaces (112) of the first device (110) of the assembly tool (100) and / or at least part of the axial elongation surfaces (122) of the second device (120) of the assembly tool (100) partially engaging in slots (311) for axial extension carried by said at least one torque outlet hub (30) on its outer periphery; - Axial bearing (1003) of at least part of the axial elongation bearing surfaces (112) of the first device (110) of the assembly tool (100) against a face of the entry element of torque (20) of the transmission system (10), and radial abutment of the axial stop member (60) against one of the at least part of the axial elongation surfaces (112) of the first device (110 ) of the assembly tool (100); - axial displacement (1004) of the second device (120) of the assembly tool (100) relative to the first device (110), in order to bring into axial abutment at least a portion of the axial extension spans (122) of second device (120) of the assembly tool (100) against a face of the axial stop member (60); - axial displacement (1005) of the second device (120) of the assembly tool (100) relative to the first device (110), in order to axially move the axial stop member (60) relative to the at least a torque output hub (30), to an assembly housing (211) of said axial stop member (60), said assembly housing (211) being located on the torque input element (20) of the transmission system (10); - insertion (1006) of the axial stop member (60) in the assembly housing (211).