WO2015049477A1

WO2015049477A1 - Dual mass flywheel provided with a pendulum damper

Info

Publication number: WO2015049477A1
Application number: PCT/FR2014/052518
Authority: WO
Inventors: Gilles Lebas; Daniel Fenioux; Fabien LEBEAU; Laurent Dequesnes
Original assignee: Valeo Embrayages
Priority date: 2013-10-03
Filing date: 2014-10-03
Publication date: 2015-04-09
Also published as: DE112014004598T5

Abstract

The invention concerns a dual mass flywheel (1) for a motor vehicle comprising: - a primary flywheel (2), comprising an annular chamber (9) filled with a lubricating agent, and a secondary flywheel (3); - a torsion damper with elastic members for transmitting a torque and damping the rotation acyclisms between the primary flywheel (2) and secondary flywheel (3), said torsion damper with elastic members comprising first and second damping stages; - a pendulum damper (49) comprising a support member (50) that is mobile in rotation about the O axis and pendulum weights (51) movably mounted on the support member (50); in which the support member (50) is rigidly secured in rotation to intermediate support elements (45), acting between elastic members of the second damping stage, via securing members (46) that sealingly pass through the sealing means (63, 64) extending between the primary flywheel (2) and the secondary flywheel (3).

Description

Double damping flywheel equipped with a pendulum damping Technical field of the invention

The invention relates to the field of transmissions for a motor vehicle and relates, more particularly, a double damping flywheel. State of the art

A double flywheel (DVA) comprises a primary flywheel intended to be fixed at the end of a crankshaft, a secondary flywheel, coaxial with the primary flywheel, and forming the reaction plate of a clutch and a shock absorber torsion device comprising deformable elastic members, associated with friction means, for transmitting the torque between the flywheels, primary and secondary, and damping vibrations and rotational acyclisms of the combustion engine.

The patent applications FR2969730 and WO2010079273 describe double damping flywheels comprising two damping stages arranged in series via an intermediate web. The first damping stage comprises curved springs, housed in an annular chamber, filled with grease, formed by the primary flywheel, and extending circumferentially between bearing seats carried by the primary flywheel and by an intermediate web, so to transmit the torque between the primary flywheel and the intermediate web. The second damping stage has three or four groups of two straight springs. Each group of two straight springs extends circumferentially between bearing seats carried by the intermediate web and by guide rings, integral in rotation with the secondary flywheel.

The springs of each group are mounted in series through support brackets interposed between the consecutive springs of the same group. The support legs are carried by a phasing member so that the springs of each of the groups deform in phase with each other. At low engine speed, especially during start-up, noise and vibrations from the engine are mainly filtered through the first damping stage with curved springs, which has the largest displacement. When the engine speed is greater, the curved elastic members undergo a force centrifugal which generates friction and limits the performance of the first damping stage. Thus, at high speed, the noise and vibrations from the engine are mainly filtered by the second damping stage whose straight springs are not subject to significant friction generated by the centrifugal force.

Furthermore, the patent application FR2986591 describes a double damping flywheel comprising, on the one hand, a damping stage with elastic members comprising curved springs mounted circumferentially between the primary flywheel and an annular web, integral in rotation with the secondary flywheel and on the other hand, a pendulum-type damper, also called pendulum oscillator or pendulum. The pendulum damper comprises a plurality of pendulum weights mounted oscillating on a support member. The support member is fixed on the annular web and, therefore, integral in rotation with the secondary flywheel.

Vibration filtration performance, dual damping flywheels, as mentioned above - that is to say having either two damping stages with elastic members or a damping stage with elastic members associated with a pendulum damper - s However, they do not prove to be sufficient, especially when the combustion engine has strong acyclisms. Object of the invention

The invention aims to remedy these problems by providing a double damping flywheel for effectively filtering vibrations.

According to one embodiment, the invention provides a dual damping flywheel for a motor vehicle comprising:

a primary flywheel, intended to be fixed to a driving shaft, and a secondary flywheel, movable in rotation relative to one another about an axis of rotation O, the primary flywheel having an annular chamber filled with a lubricating agent;

sealing means extending between the primary flywheel and the secondary flywheel, making it possible to seal the annular chamber;

a torsion damper with elastic members for transmitting a torque and damping rotation acyclisms between the primary and secondary flywheels, said torsion damping device comprising: A first damping stage, arranged to couple in rotation the primary flywheel and an intermediate web, comprising curved elastic members, housed in the annular chamber; and

A second damping stage, arranged to couple in rotation the intermediate web and the secondary flywheel, comprising a plurality of groups of elastic members and intermediate support elements, each intermediate support element being interposed between two elastic members of the same group in order to arrange them in series, the intermediate support elements being integral in rotation so that the elastic members of each of the groups deform in phase with each other;

- A pendulum damper comprising a support member movable in rotation about the axis O and pendulum mounted movable weight on the support member;

wherein the support member is secured in rotation to the intermediate support members by means of fasteners sealingly passing through the sealing means extending between the primary flywheel and the secondary flywheel.

Such a double damping flywheel is particularly powerful since it combines the presence of two damping stages and a pendulum damper.

In addition, it is all the more powerful that the pendulum damper is located at the member ensuring the phasing between the resilient members of the second damping stage and that such implementation provides performance optimal. It has indeed been found by the plaintiff that the pendulum damper was more effective, on the one hand, when it was rotatably mounted elements of low mass, and secondly, when it was arranged at the outlet of one or more damping stages with elastic members in order to prevent the pendulum damper from saturating while being subjected to an excessive level of torsional excitation. Therefore, such an implantation is optimal in that the pendular damper is rotationally secured to elements having a low mass and is disposed near the output of the torsion damper with elastic members. In addition, the pendulum damper being disposed outside the annular chamber filled with lubricant, its operation is not likely to be disturbed by the lubricant.

According to other advantageous embodiments, such a double damping flywheel can have one or more of the following characteristics:

the sealing means comprise a sealing washer, elastically deformable, comprising an external end edge pressed against the primary flywheel and having orifices for the passage of the fastening members of the support member to the support elements; intermediate, said sealing washer being secured in rotation to the intermediate support members and the support member by means of the fasteners.

- The fasteners each comprise a shoulder having a diameter greater than the passage orifices of the fasteners and the sealing washer is pressed against said shoulders.

- The sealing washer is clamped between the shoulder of the fasteners and the support member pendulum weights.

- The sealing means comprise a second elastically deformable sealing washer having an inner end edge fixed on the secondary flywheel and an outer end edge pressed against the support member of the weights.

the double damping flywheel comprises two guide washers comprising circumferentially extending windows, each intended to house a group of elastic members and comprising radial support zones intended to support the ends of the elastic members, said washers of guides being secured in rotation of the secondary flywheel, the second sealing washer being clamped between one of the guide washers and the secondary flywheel to ensure its attachment to the secondary flywheel.

- The sealing washer extends radially to a radially inner portion of the secondary flywheel.

- The sealing washer has at its inner edge baffles for sealing, without contact with the secondary flywheel.

the sealing washer is an elastically deformable frustoconical metal sheet mounted pre-stressed. - The primary flywheel has a central hub, radially internal, bearing a centering bearing of the secondary flywheel, a radially extending annular portion, an axially extending cylindrical portion and an annular cover fixed on the cylindrical portion, the means for seal extending between the annular cover and the secondary flywheel.

the secondary flywheel has a rear face, disposed opposite the primary flywheel, comprising an inner portion and an outer portion axially offset forwardly with respect to the inner portion, and the pendulum flyweights extend in a space annular formed axially between the primary flywheel and the outer portion of the rear face of the secondary flywheel.

the pendulum weights extend at a radial distance from the axis O substantially equal to that of the curved elastic members of the first damping stage.

- The inner and outer portions of the rear face of the secondary flywheel are connected by a cylindrical surface and the support member is guided in rotation on the secondary flywheel by means of a bearing supported by said cylindrical surface.

- The primary flywheel has a central hub which supports a steering bearing in rotation of the secondary flywheel the support member is guided in rotation on the primary flywheel by means of a guide bearing supported by said central hub, the support member comprising a ring ensuring the support of the flyweights and an inner hub cooperating with the guide bearing of the support member, the ring and the inner hub being disposed on either side of the secondary flywheel and secured by the intermediate fasteners passing through orifices in the secondary flywheel.

- The primary flywheel has a cylindrical radially outer rim covering the annular space in which extend the counterweight.

the secondary flywheel comprises a front face comprising an annular friction surface intended to form a reaction plate of a clutch, and an annular recess extending radially inside the annular friction surface, providing an annular space housing the pendulum weights and their support member, and the support member is secured to the intermediate support elements through fasteners passing through orifices in the secondary flywheel. - The guide bearing in rotation of the support member is carried by the central hub of the primary flywheel.

- The primary flywheel has a central hub and the secondary flywheel is guided in rotation on the central hub of the primary flywheel through a bearing.

- The support member cooperates with one of the primary and secondary flywheels through a rotating guide bearing.

The invention also relates to a hybrid architecture comprising a double damping flywheel mentioned above, an electric machine comprising a stator and a rotor and a clutch for coupling or uncoupling in rotation the double damping flywheel to the rotor of the electric machine.

The invention also aims to remedy these problems by providing a double damping flywheel for effectively filtering vibrations.

a torsion damper with elastic members for transmitting a torque and damping rotation acyclisms between the primary and secondary flywheels, said torsion damping device comprising:

A first damping stage, arranged to couple in rotation the primary flywheel and an intermediate web, comprising curved elastic members, housed in the annular chamber; and

A second damping stage, arranged to couple in rotation the intermediate web and the secondary flywheel, comprising a plurality of groups of elastic members and intermediate support elements, each intermediate support element being interposed between two elastic members of the same group in order to arrange them in series, the intermediate support elements being integral in rotation so that the elastic members of each of the groups deform in phase with each other; - A pendulum damper comprising a support member movable in rotation about the axis O and pendulum mounted movable weight on the support member;

wherein the support member is rotatably integral with the intermediate support members and wherein the swinging damper extends outside the annular chamber.

In addition, it is all the more powerful that the pendulum damper is located at the member ensuring the phasing between the resilient members of the second damping stage and that such implementation provides performance optimal. It has indeed been found by the plaintiff that the pendulum damper was more effective, on the one hand, when it was rotatably mounted elements of low mass, and secondly, when it was arranged at the outlet of one or more damping stages with elastic members in order to prevent the pendulum damper from saturating while being subjected to an excessive level of torsional excitation. Therefore, such an implantation is optimal in that the pendular damper is rotationally secured to elements having a low mass and is disposed near the output of the torsion damper with elastic members.

In addition, the pendulum damper being disposed outside the annular chamber filled with lubricant, its operation is not likely to be disturbed by the lubricant.

the secondary flywheel has a rear face, disposed opposite the primary flywheel, comprising an inner portion and an outer portion axially offset forwardly with respect to the inner portion, and the pendulum flyweights extend in a space annular formed axially between the primary flywheel and the outer portion of the rear face of the secondary flywheel. the pendulum weights extend at a radial distance from the axis O substantially equal to that of the curved elastic members of the first damping stage.

the primary flywheel comprises a central hub which supports a guide bearing in rotation of the secondary flywheel, the support member being guided in rotation on the primary flywheel by means of a guide bearing supported by said central hub, support member comprising a ring ensuring the support of the flyweights and an inner hub cooperating with the guide bearing of the support member, the ring and the inner hub being disposed on either side of the secondary flywheel and secured by via fasteners passing through orifices in the secondary flywheel.

the secondary flywheel comprises a front face comprising an annular friction surface intended to form a reaction plate of a clutch, and an annular recess extending radially inside the annular friction surface, providing an annular space housing the pendulum weights and their support member, and the support member is secured to the intermediate support elements through fasteners passing through orifices in the secondary flywheel.

the double damping flywheel comprises sealing means extending between the primary flywheel and the secondary flywheel, making it possible to seal the annular chamber and the support member is secured in rotation to the support elements of the intermediates via fasteners sealingly passing through said sealing means.

the sealing means comprise a sealing washer, elastically deformable, comprising an external end edge pressed against the primary flywheel and having orifices for the passage of the fastening members of the support member to the support elements; intermediate, said washer sealing member being secured in rotation to the support elements of intermediaries and to the support member via the fasteners.

- The fasteners comprise a shoulder having a diameter greater than the diameter of the orifices of the sealing washer, said sealing washer being pressed against said shoulders.

the sealing washer is an elastically deformable frustoconical metal sheet mounted pre-stressed.

- The primary flywheel has a central hub, radially internal, bearing a centering bearing of the secondary flywheel, a radially extending annular portion, an axially extending cylindrical portion and an annular cover fixed on the cylindrical portion, the means for seal extending between the annular cover and the secondary flywheel.

- The guide bearing in rotation of the support member is carried by the central hub of the primary flywheel. - The primary flywheel has a central hub and the secondary flywheel is guided in rotation on the central hub of the primary flywheel through a bearing.

the elastic members of the plurality of groups of elastic members of the second damping stage are distributed circumferentially on the same diameter.

- A primary flywheel, intended to be fixed to a driving shaft, and a secondary flywheel, movable in rotation relative to each other about an axis of rotation O;

a torsion damper with elastic members for transmitting a torque and damping rotation acyclisms between the primary and secondary flywheels, said torsion damper with elastic members comprising a plurality of groups of elastic members and intermediate support elements, each intermediate support element being interposed between two elastic members of the same group in order to arrange them in series, the intermediate support elements being integral in rotation so that the elastic members of each of the groups deform in phase with each other; with the others ; and

wherein the support member is rotationally secured to the intermediate support members and cooperates with one of the primary and secondary flywheels through a rotational guide bearing. Such a double damping flywheel is particularly effective since the pendulum damper is located at the member ensuring the phasing between the resilient members and that such implantation provides optimal performance. It has indeed been found by the plaintiff that the pendulum damper was more effective when it was rotatably mounted to elements having a low mass. Therefore, such implantation is optimal.

In addition, the rotation guide of the feeder support member on one or other of the secondary flywheels allows, firstly, to precisely center the feeder support member and secondly to ensure better guidance in rotation of the member ensuring the phasing between the elastic members.

- The guide bearing in rotation of the support member is carried by the central hub of the primary flywheel.

- The support member comprises a ring for supporting the flyweights and an inner hub for centering the support member, the ring and the inner hub being disposed on either side of the secondary flywheel and secured by means of fasteners passing through orifices in the secondary flywheel, the ring being disposed in an annular space extending between the primary flywheel and the secondary flywheel and the inner hub cooperating with the mounted bearing. by the central hub of the primary flywheel.

- The secondary flywheel has a cylindrical surface carrying the guide bearing in rotation of the support member.

the secondary flywheel has a rear face, disposed opposite the primary flywheel, comprising an inner portion and an outer portion axially offset forwardly with respect to the inner portion, said inner and outer portions being connected by the cylindrical surface bearing the guide bearing in rotation of the support member. the flyweights extend in an annular space extending axially between the outer portion of the rear face of the secondary flywheel and the primary flywheel.

the secondary flywheel comprises a front face comprising an annular friction surface intended to form a reaction plate of a clutch, and an annular recess extending radially inside the annular friction surface, providing an annular space housing the pendulum weights and their support member, the cylindrical surface carrying the guide bearing being formed in an inner edge of the recess, and the support member being secured to the support elements of intermediaries via fasteners passing through orifices in the secondary flywheel.

the primary flywheel comprises a sealed annular chamber filled with a lubricating agent, in which the torsion damper with elastic members comprises:

A first damping stage comprising curved elastic members housed in the annular chamber, arranged to couple in rotation the primary flywheel and an intermediate web; and

A second damping stage comprising the plurality of groups of elastic members arranged in series via intermediary support elements;

- The pendulum damper extends outside the annular chamber.

- The bearing guide in rotation of the support member is a sliding bearing or a rolling bearing.

the double damping flywheel comprises sealing means extending between the primary flywheel and the secondary flywheel, making it possible to seal the annular chamber and the support member is secured in rotation to the support elements of the intermediates via fasteners sealingly passing through said sealing means. the sealing means comprise a sealing washer, elastically deformable, comprising an external end edge pressed against the primary flywheel and having orifices for the passage of the fastening members of the support member to the support elements; intermediate, said sealing washer being secured in rotation to the intermediate support members and the support member by means of the fasteners.

- The primary flywheel has a central hub, radially internal, bearing a centering bearing of the secondary flywheel, a radially extending annular portion, an axially extending cylindrical portion and an annular cover fixed on the cylindrical portion, the means for seal extending between the annular cover and the secondary flywheel. The invention also relates to a hybrid architecture comprising a double damping flywheel mentioned above, an electric machine comprising a stator and a rotor and a clutch for coupling or uncoupling in rotation the double damping flywheel to the rotor of the electric machine.

The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the appended figures.

In these figures: - Figure 1 is an exploded perspective view of a double damping flywheel according to a first embodiment;

- Figure 2 is a perspective view of the double damping flywheel of Figure 1, wherein the secondary flywheel is shown partially broken away.

- Figure 3 is a half-sectional view along the axis O-111 of the double damper of Figure 2, associated with a clutch.

- Figure 4 is a half-sectional view along the axis O-IV of the double damper of Figure 2, associated with a clutch.

- Figures 5 and 6 are half-sectional views of a double damping flywheel according to a second embodiment, associated with a clutch.

- Figures 7 and 8 are half-sectional views of a double damping flywheel according to a third embodiment, associated with a clutch.

- Figure 9 is a perspective view of a double damping flywheel according to a fourth embodiment, wherein the secondary flywheel is shown partially broken away.

- Figure 10 is a half-sectional view along the axis O-X of the double damping flywheel of Figure 9, associated with a clutch.

- Figure 11 is a half-sectional view along the axis O-XI of the double damping flywheel of Figure 9, associated with a clutch.

Figure 12 is a half-sectional view along the axis O-XII of the double damping flywheel of Figure 9, associated with a clutch. - Figure 13 is a half-sectional view along the axis O-XIII of the double damping flywheel of Figure 9, associated with a clutch.

- Figure 14 is a half-sectional view of a double damper, according to a fifth embodiment, associated with a clutch.

- Figure 15 is a half-sectional view of a double damper, according to a sixth embodiment, associated with a clutch.

- Figure 16 is a perspective view of a double damping flywheel according to a seventh embodiment, wherein the secondary flywheel is shown partially broken away.

- Figure 17 is a half-sectional view along the axis O-XVII of the double damping flywheel of Figure 16, associated with a clutch.

Figure 18 is a half-sectional view along the axis O-XVIII of the double damping flywheel of Figure 16, associated with a clutch.

- Figure 19 is a perspective view of a double damping flywheel according to an eighth embodiment, wherein the secondary flywheel is shown partially broken away.

- Figure 20 is a half-sectional view along the axis O-XX of the double damping flywheel of Figure 19, associated with a clutch.

- Figure 21 is a half-sectional view of a double damping flywheel according to a ninth embodiment, associated with a clutch.

Figure 22 is a detailed perspective view of a pendulum feeder, a sidewall is shown partially broken away.

Detailed description of embodiments

In the description and the claims, the terms "external" and "internal" as well as the "axial" and "radial" orientations will be used to designate, according to the definitions given in the description, elements of the double damping flywheel. By convention, the "radial" orientation is directed orthogonally to the axis O of rotation of the double damping flywheel determining the "axial" orientation and, from the inside towards the outside away from said axis O, the "circumferential" orientation is directed orthogonally to the axis O of rotation of the double damping flywheel and orthogonal to the radial direction. The terms "external" and "internal" are used to define the relative position of one element relative to another, with reference to the axis O, an element close to the axis is thus described as internal as opposed to a external element located radially at the periphery. Moreover, the terms "rear" and "front" are used to define the relative position of one element relative to another in the axial direction, an element to be placed close to the engine being designated by "rear" as opposed to an element intended to be placed further from the engine.

We first refer to Figures 1 to 4 which show a double damping flywheel 1 according to a first embodiment. The double damping flywheel 1 comprises a primary flywheel 2, intended to be fixed to a driving shaft, such as the crankshaft of a combustion engine, not shown, and a secondary flywheel 3 which is centered and guided on the primary flywheel 2 by means of a bearing 4. The primary flywheels 2 and secondary 3 are intended to be mounted movably about an axis of rotation O and are, moreover, rotatable one by relative to the other, about said axis O.

The primary flywheel 2 comprises a central hub 5, radially internal, bearing the centering bearing 4 of the secondary flywheel 3, an annular portion 6 extending radially and a cylindrical portion 7 extending axially, on the opposite side to the motor, from the external periphery of the annular portion 6. The primary flywheel 2 also has an annular cover 8 fixed on the cylindrical portion 7. The annular cover 8 defines with the annular portion 6 and the cylindrical portion 7, an annular chamber 9.

In the embodiment shown, the bearing 4 of centering of the secondary flywheel 3 on the primary flywheel 2 is a rolling bearing. The central hub 5 of the primary flywheel 2 comprises a shoulder 10, serving to support the inner ring of the rolling bearing, which retains said inner ring towards the motor. Similarly, the secondary flywheel 3 has on its inner periphery a shoulder 11 serving to support the outer ring of the rolling bearing and retaining said outer ring, in the opposite direction to the motor. Alternatively, the rolling bearing can be replaced by a plain bearing.

The central hub 5 comprises a radial annular portion in which orifices 1 2 are formed. These orifices 12 are arranged opposite the orifices 13 formed in the radially inner portion of the annular portion 6 of the primary flywheel 2. Screws fastening, not shown, engaged in the orifices 12, 13, allow the attachment of the primary flywheel 2 at the end of the driving shaft. The wheel secondary 3 has orifices 26, arranged vis-à-vis the orifices 12, 13 and for the passage of the screws, when mounting the double damping flywheel 1 on the drive shaft. The primary flywheel 2 carries, on its outer periphery, a ring gear 14 for driving in rotation of the primary flywheel 2, using a starter.

The secondary flywheel 3 is intended to form the reaction plate of a clutch, shown in FIGS. 3 and 4. The clutch comprises a cover 15, fixed on the outer periphery of the secondary flywheel 3, a pressure plate 16, a annular diaphragm 17 axially biasing the pressure plate 16 towards the secondary flywheel 3 and a clutch disc 18. The clutch disk 18 is equipped with friction linings 19 and a splined hub 20 cooperating with splines formed on a drive shaft 21. The pressure plate 16 is rotatably connected to the lid 15 by tangential elastic tongues, not shown, with axial action permitting axial movement of the pressure plate 16 relative to the reaction plate. Thus, the pressure plate 16 is movable, relative to the reaction plate, between an engaged position, in which the friction linings 19 are clamped between an annular friction surface 25 of the secondary flywheel 3, forming a reaction plate, and the pressure plate 16, and a disengaged position. A clutch abutment 24 is adapted to pivot the diaphragm 17 to move the clutch to its disengaged position. The secondary flywheel 3 has, near its outer edge, studs 22 and orifices 23 for mounting the cover 15.

The double damping flywheel 1 also comprises a torsion damper with elastic members for transmitting the torque and damping rotation acyclisms between the primary flywheels 2 and secondary 3 in order to reduce vibrations from the engine of the motor vehicle. The torsion damper has first and second damping stages arranged in series through an intermediate annular web 27.

The first damping stage comprises curved elastic members 28 with a circumferential effect, such as helical springs, housed in the annular chamber 9 and distributed circumferentially around the axis O. Each curved elastic member 28 may comprise two coaxial springs mounted on the outside. one in the other. The curved elastic members 28 extend, on the one hand, between two bearing seats 30 carried by the primary flywheel 2 and, on the other hand, between two support lugs 29 formed on the intermediate web 27. Each seat support 30 carried by the primary flywheel 2 consists of a boss 30a formed in the annular portion 6 and a boss 30b formed in the cover 8. Thus, in operation, the curved elastic members 28 are supported at a first end against a support seat 30 carried by the primary flywheel 2 and, at a second end, against a support lug 29 formed on the intermediate web 27, so as to ensure the transmission of torque between the primary flywheel 2 and the intermediate sail 27.

In order to limit the friction between the curved elastic members 28 and the cylindrical portion 7 of the primary flywheel 2, the annular chamber 9 is filled with a lubricating agent, preferably grease. To prevent lubricant leakage to the outside of the annular chamber 9, the double damping flywheel 1 is equipped with sealing means which will be described later.

In addition, the double damping flywheel 1 is equipped with guiding members, in the form of chutes 31 mounted in the annular chamber 9, between the cylindrical portion 7 of the primary flywheel 2 and the outer periphery of the curved elastic members 28. The troughs 31 are formed of a bent sheet longitudinally and transversely.

The second damping stage comprises a plurality of groups of two resilient members 32, 33 providing a coupling between the intermediate web 27 and two guide washers 34, 35. The guide washers 34, 35, shown, partially torn off in the figure 1, extend axially on either side of the intermediate web 27.

The straight elastic members 32, 33 are distributed circumferentially, on the same diameter, about the axis O. Each resilient member 32,33 may comprise two coaxial springs mounted one inside the other. In the embodiment shown, the second damping stage comprises four groups of two straight elastic members 32, 33.

Each group of straight elastic members 32, 33 extends between two support seats formed respectively by two circumferentially consecutive lugs 36 of the intermediate web 27. The lugs 36 of the intermediate web have lugs 37 which extend circumferentially on either side of the lugs 36, and allow to retain radially the ends of the straight elastic members 32, 33.

The guide washers 34, 35 comprise circumferentially extending windows 38, each intended to house a group of two straight elastic members 32, 33. The circumferential ends 39 of the windows 38 comprise radial bearing zones intended for the support of the ends of the straight elastic members 32, 33. Moreover, the windows 38 comprise curved edges 40, 41, internal and external, allowing a radial and axial retention of the straight elastic members 32, 33. The guide washers 34, 35 are fixed to one another and secured in rotation to the secondary flywheel 3, at their radially inner portion, via rivets 42 for example. In the embodiment shown, a ring 56 forming a spacer is inserted between the two guide washers 34, 35, at their radially inner portion, in order to maintain the required gap between the guide washers 34, 35. elsewhere, the ring 56 carries on its outer periphery abutment surfaces, not shown, intended to cooperate with abutment surfaces carried by the inner periphery of the intermediate web 27. Such abutment surfaces make it possible to limit the angular deflection between the intermediate web 27 and the guide washers 34, 35 to protect the right elastic members 32, 33.

The straight elastic members 32, 33 of each group are connected in series by means of a phasing member, free in rotation with respect to the intermediate web 27 and to the guide washers 34, 35.

The phasing member comprises two sheets 43, 44 extending on either side of the intermediate web 27, between said intermediate web 27 and the guide washers 34, 35. Each sheet 43, 44 comprises a window 45 to house each of the straight elastic members 32, 33. The phasing member also comprises intermediate support elements: the support lugs 45, interposed between the two straight elastic members 32, 33 consecutive of the same group, so that that the two straight elastic members 32, 33 consecutive, of the same group, are arranged in series. The bearing lugs 45 comprise two substantially flat bearing faces, forming an angle between them and serving to support the ends of the straight elastic members 32, 33. Each bearing lug 45 further includes, on its board radially external, two external lugs 47, 48 opposite, extending on either side of each support lug 45, and making it possible to retain the ends of the straight elastic members 32, 33 radially. The bearing lugs 45 are fixed to the plates 43, 44 by rivets 46. Therefore, the support lugs 45 are integral in rotation, which makes it possible to ensure a deformation of the right elastic members 32, 33 in phases with each other so that the elastic forces generated by the second stage of damping are distributed circumferentially, homogeneously.

Thus, in operation, each group comprises a first right elastic member 33, 34 bearing on a first end against a support lug 36 of the intermediate web 27 and at a second end against a support lug 45 of the phasage while the second right elastic member 34, 33 is supported at a first end against said support lug 45 of the phasing member and at a second end against a radial bearing zone formed at the circumferential end 39 of the windows 38 guide washers 34, 35.

Therefore, the driving torque is transmitted from the primary flywheel 2 to the intermediate web 27 by means of the curved elastic members 28 and the intermediate web 27 to the secondary flywheel 3 by means of the straight elastic members 32, 33.

Moreover, the double damping flywheel 1 is also equipped with a swinging damper 49. The swinging damper 49 comprises a support member 50 and a plurality of pendular weights 51 circumferentially distributed on the support member 50. The weights 51 are able to oscillate relative to the support member 50 in a plane orthogonal to the axis of rotation O, in response to the irregularities of rotation. Each weight 51 comprises two flanks 52, 53 which extend axially on either side of the support member 50 and are axially connected to one another via two connecting struts 54. Each connecting spacer 54 axially crosses an associated opening of the support member 50.

The oscillations of the flyweights 51 are guided by guide means, shown in detail in FIG. 22. The guide means comprise, for each flyweight 51, two rolling elements 55 which each cooperate with a first raceway carried by the support member 50 and with a second raceway carried by the weight 51, and extending in front of the first raceway. The first rolling tracks are formed by the outer edge of the passage openings of the spacers 54. The second raceways are carried by the spacer 54 connecting the flanks of each weight 50. The rolling element 55 is, for example, formed by a cylindrical roller of circular section. The first and second race tracks have a generally epicyclic shape and are arranged such that the oscillation frequency of the flyweights 51 is proportional to the rotational speed of the drive shaft. The weights 51 further comprise stop elements 91 of elastomer material for damping shocks, when the pendulum weights 51 arrive at the end of stroke or during engine stop. The stop elements 91 are here disposed between the two flanks 52, 53 of each weight and abut against the edge of the passage openings of the spacers 54.

In the embodiment shown in FIGS. 1 to 4, the support member 50 of the pendulum weights comprises a ring 58 ensuring the support of the weights 51 and an internal hub 57 intended to ensure the centering of the support member 50 by relative to the axis O. Thanks to the two-part constitution of the support member 50, the ring 58 may advantageously consist of a non-stamped flat piece, which makes it easier to ensure the accuracy of the geometry of the rolling tracks formed by the outer edge of the openings in the ring 58.

Furthermore, as shown in FIGS. 3 and 4, the rear face of the secondary flywheel 3 comprises a radially outer portion axially offset towards its front portion with respect to its radially inner portion so as to provide an annular space 60 extending axially between the annular chamber 9 and the radially outer portion of the secondary flywheel 3. The radially outer portion and the radially inner portion are connected by a cylindrical surface for centering and guiding in rotation the inner hub 57 of the support member relative to the flywheel secondary 3. The inner hub 57 is here centered and guided in rotation on the cylindrical surface of the secondary flywheel 3, by means of a smooth bearing ring 62. Such a smooth bearing ring 62 is made of a material having a low coefficient of friction.

The weights 51 are positioned in the annular space 60 arranged axially between the annular chamber 9 and the radially outer portion of the steering wheel. Secondary 3. Thus, the weights 41 extend outside the annular chamber 9 filled with grease. Therefore, the operation of the swinging damper 49 is not likely to be disturbed by the grease. Moreover, the pendulum weights 51 are arranged at a radial distance from the axis O substantially equal to that of the curved elastic members 28 of the first damping stage. Therefore, the counterweight 51 are moved away from the axis of rotation O, so that the efficiency of the pendulum damper 49 is optimal.

Furthermore, the primary flywheel 1 carries a radially outer cylindrical rim 61 covering the swinging damper 49. Such a cylindrical rim 69 makes it possible to take advantage of the annular space 60, formed axially between the annular chamber 9 and the secondary flywheel 3 to add additional inertia to the primary flywheel 1. The ring 58 is fixed to the inner hub 57 by means of rivets 59, shown in FIG. 4. Moreover, the inner hub 57 is fixed to the phasing member by means of rivets 46, shown in FIG. In the embodiment shown, the inner hub 57 is fixed to the phasing member by means of the rivets 46 which also serve to ensure the assembly of the phasing member, by fixing the legs of FIG. support 45 to the plates 43, 44. For this purpose, the rivets 46 are rivets spacers having a central portion of larger diameter ensuring the axial spacing between the plate 44 and the inner hub 57. The rivets 46 have two ends s' extending on either side of the central portion. One end has a rivet head for holding the inner hub 57 against the central portion of the rivet and the other end has a rivet head for pressing the plates 43, 43 and the support legs 45 of the rivet. phasing member against the central portion of the rivet. Thus, the support member 50 of the weights is rotatably connected to the phasing member.

In order to seal the annular chamber 9 formed by the primary flywheel 2, a sealing washer 63 extends radially between a radially inner rim of the annular cover 8 of the primary flywheel 2 and the radially inner portion of the secondary flywheel 3. The sealing washer 63 is, for example, a frustoconical plate elastically deformable mounted axially preloaded, so that its outer end edge is pressed against the annular cover 8. In the embodiment shown, a plastic washer 64 is positioned between the sealing washer 63 and the cover annular 8 to limit friction. The sealing washer 63 is provided with orifices 65 allowing the rivets 46 to pass therethrough. The sealing washer 63 is here pressed between a shoulder formed at the end of the central portion of the rivets 46 and the internal hub 57 of the support member 50 so as to seal the passage of the rivets 46 through said sealing washer 63. The sealing washer 63 is thus integral in rotation with the phasing member and the control member. support 50 of the weights 51. In one embodiment, the sealing washer 63 has at its inner edge baffles for sealing, without contact with the secondary flywheel 3.

In addition, the sealing means may also comprise a sealing washer, not shown in FIGS. 1 to 4, arranged on the motor side, and extending radially between the guide washer 35 and the radially extending annular portion 6. primary flywheel 1. This sealing washer is also a frustoconical elastically deformable sheet mounted axially preloaded.

Figures 5 and 6 illustrate a double damping flywheel 1 according to a second embodiment. This second embodiment differs from the embodiment of FIGS. 1 to 4, on the one hand by the nature of the centering bearing of the support member 50 of the weights 51 and, on the other hand, by the means of sealing for sealing the annular chamber 9.

In this embodiment, the support member 50 is centered and guided in rotation on a cylindrical surface formed in the secondary flywheel 3 by means of a rolling bearing 66. The inner hub 57 of the support member comprises a shoulder serving to support the outer ring of the rolling bearing 66, which retains said outer ring towards the motor. The secondary flywheel 3 also has a shoulder holding the inner ring in the opposite direction to the engine.

Furthermore, the sealing of the annular chamber 9 is provided by two sealing washers 67, 68, respectively external and internal. The outer sealing washer 67 provides a seal between the annular cover 8 of the primary flywheel 2 and the support member 50 of the weights 51 while the inner sealing washer 68 ensures a seal between the support member 50 of the weights 51 and the radially inner portion of the secondary flywheel 3.

The external sealing washer 67 is a frustoconical elastically deformable sheet mounted axially preloaded. The frustoconical sheet is provided with orifices allowing the rivets 46 to pass therethrough. The outer sealing washer 67 is here pressed between a shoulder formed at the end of the central portion of the rivets 46 and the internal hub 57 of the valve member. support in order to ensure sealing at the passage of the rivets 46. The outer sealing washer 67 is integral in rotation with the phasing member and the support member 50 of the weights 51. In order to limit the friction, a plastic washer 69 is inserted between the outer sealing washer 67 and the radially inner rim of the annular cover 8. The internal sealing washer 68 is rotationally integral with the secondary flywheel 3. To do this, its radially inner end is here clamped between the secondary flywheel 3 and the guide washer 34. The internal sealing washer 68 is a frustoconical plate elastically deformable mounted axially preloading and extending radially between the inner hub 57 of the body member. support 50 of the weights 51 and the radially inner portion of the secondary flywheel 3. In order to limit friction, a plastic washer 70 is positioned between the inner hub 57 and the internal sealing washer 68.

Figures 7 and 8 illustrate a double damping flywheel 1 according to a third embodiment. This third embodiment differs from the second embodiment of FIGS. 5 and 6, in that the internal hub 57 of the support member 50 is secured to the ring 58 ensuring the support of the weights 51 by means of a collar extending, relative to the ring 58, in the opposite direction to the motor. Therefore, one of the ends of the rivets 46, for fixing the phasing member to the support member 50, pass through orifices in the ring 58 and in the inner hub 57 (see Figure 7 ). In addition, the outer sealing washer 67 is here pressed between a shoulder formed at one end of the central portion of the rivets 46 and the ring 58 of the support member 50.

In the embodiment of FIGS. 9 to 21, the primary flywheel 2 is a flexible flywheel. In other words, its annular portion 6 extending radially between the central hub 5 and the cylindrical portion is at least partly formed of one or more flexible sheets. Such a primary flywheel makes it possible to damp excitations, in the axial direction, of the drive shaft. Figures 9 to 13 illustrate a double damping flywheel 1 according to a fourth embodiment.

This fourth embodiment differs in particular from the embodiments described and illustrated above in that the support member 50 of the weights 51 is centered and guided in rotation on the primary flywheel 2. To do this, the internal hub 57 intended to ensure the centering of the support member 50 is centered on the central hub 5 of the primary flywheel 2. In the embodiment shown, the inner hub 57 of the support member 50 of the weights 51 is centered on the central hub 5 of the primary flywheel through a rolling bearing 74. However, alternatively, the rolling bearing can be replaced by a plain bearing. Such a centering of the support member 50 of the weights 51 on the central hub 5 of the primary flywheel 2 makes it possible to use a bearing having a smaller diameter and, consequently, less expensive.

In this embodiment, the ring 58 ensuring the support of the weights 51 and the inner hub 57 intended to ensure the centering of the support member 50 are arranged on either side of the secondary flywheel 3. Therefore, the secondary flywheel 3 is equipped with openings 71 allowing the passage of fastening tabs 72 formed at the outer periphery of the inner hub 57. The fastening tabs 72 serve to secure the support ring 58 of the flyweights 51 to the inner hub 57. embodiment shown, the fixing lugs 72 are fixed to the ring 58 by means of an annular flange 73. As shown in FIG. 13, the fastening lugs 72 of the inner hub 57 are fixed to the flange 73 by fasteners, such as screws 74. Similarly, as shown in FIG. 11, the support ring 58 of the flyweights 51 is fixed to the annular flange 73 by fasteners, such as screws 76.

In addition, in the embodiment shown, the flange 73 makes it possible to rotate the support lugs in rotation. The flange 73 thus replaces the plates 43, 44 of the phasing member of the embodiments of FIGS. 1 to 8. The bearing lugs 45 are secured to the flange 73 via the rivets 46, shown in FIG. 46 comprise a central portion forming a spacer between the flange 73 and the support lugs 45. One of the ends of the rivets 46 has a rivet head making it possible to hold the bearing lugs 45 against the shoulder formed at the end of the central portion of the rivet 46. The other end of the rivets 46 presents a rivet head which keeps the flange 73 against the shoulder formed at the other end of the central portion of the rivet 46.

Furthermore, in this embodiment, the sealing of the annular chamber 9 is provided by two sealing rings 67, 68, respectively external and internal. The outer sealing washer 67 ensures a seal between the annular cover 8 of the primary flywheel 2 and the flange 73 while the inner sealing washer 68 seals between the flange 73 and the inner portion of the secondary flywheel . This arrangement of the sealing means is thus substantially similar to that described with reference to FIGS. 5 and 6.

Figure 14 illustrates a double damping flywheel 1 according to a fifth embodiment. In this embodiment, the inner hub 57 is secured to the ring 58 ensuring the support of the weights 51 via screws 77. The screws 77 pass through orifices formed in the inner hub 57 and in the ring 58 and cooperate with a threaded bore 78 formed at one end of the rivets 46.

Figure 15 illustrates a double damping flywheel 1 according to a sixth embodiment. This embodiment differs from the embodiment of FIG. 14 only in that the rolling bearing 74 of the fifth embodiment has been replaced by a plain bearing ring 79.

Figures 16 to 18 illustrate a double damping flywheel 1 according to a seventh embodiment. In this embodiment, the rear face of the secondary flywheel 3 comprises, as in the embodiment of Figures 1 to 4, a radially outer portion axially offset forwardly relative to its radially inner portion. The radially outer portion and the radially inner portion are connected by a cylindrical surface supporting a bearing 66 for guiding the inner hub 57 of the support member. However, in this embodiment, the radially outer portion here comprises an annular recess 80 forwards relative to the outer zone of the secondary flywheel 3 carrying the annular friction surface for forming the reaction plate. The weights 51 extend in a space 81 delimited between the primary flywheel and the secondary flywheel at the level of said annular recess 80.

In this embodiment, the support member 50 of the weights 50 is secured in rotation to the phasing member of the second damping stage. screw folded legs 82, formed in the ring 58. The folded tabs 82 are secured to the phasing member via the rivets 46.

Figures 19 to 21 illustrate an eighth embodiment. In this embodiment, the front face of the secondary flywheel 3 comprises an annular recess 84 extending radially inside the annular friction surface, intended to cooperate with the friction linings of the clutch. The annular recess 84 thus provides an annular space for housing the pendulum weights 51 and their support member 50. The secondary flywheel 3 further includes orifices 85 allowing the passage of fastening tabs 86 formed at the outer periphery of the support member. support 50 of the weights 51. The fixing lugs 86 are secured to the phasing member of the second damping stage via the rivets 46. The rivets 46 each carry a spacer 87 which is interposed between the sealing washer 63 and the support member 50. weights 51.

The inner edge of the annular recess 84 has a cylindrical surface 88 bearing a rotational guide bearing of the support member 50. The bearing may be a rolling bearing 89, as shown in FIG. 20 or a plain bearing ring. 90, as shown in Figure 21.

In an embodiment not shown, the double damping flywheel is integrated in a transmission assembly for a hybrid vehicle, intended to be arranged between a heat engine and a gearbox. Such a transmission assembly comprises a double damping flywheel 1 as previously described an electric machine comprising a stator and a rotor and a clutch for coupling or uncoupling in rotation the double damping flywheel of the rotor of the electric machine. Furthermore, the rotor of the electric machine is coupled to the gearbox via a second clutch that can be arranged between the rotor of the electric machine and the input shaft of the gearbox or directly integrated into the gearbox. . The application of a dual damping flywheel according to the invention to a transmission assembly for a hybrid vehicle is particularly appropriate in view of its small size and its high performance.

Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it is comprises all the technical equivalents of the means described and their combinations if they fall within the scope of the invention.

The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps.

In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

1. Double shock-absorbing flywheel (1) for a motor vehicle comprising:

- a primary flywheel (2), intended to be fixed to a driving shaft, and a secondary flywheel (3), movable in rotation relative to each other around an axis of rotation O, the primary flywheel ( 2) comprising an annular chamber (9) filled with a lubricating agent;

- sealing means (63, 64, 67, 68, 69, 70) extending between the primary flywheel (2) and the secondary flywheel (3), making it possible to ensure the sealing of the annular chamber (9 ) ;

- a torsion damper with elastic members for transmitting a torque and damping rotational acyclisms between the primary (2) and secondary flywheels (3), said torsion damper with elastic members comprising:

· a first damping stage, arranged to couple in rotation the primary flywheel (2) and an intermediate web (27), comprising curved elastic members, housed in the annular chamber (9); And

• a second damping stage, arranged to couple in rotation the intermediate web (27) and the secondary flywheel (3), comprising a plurality of groups of elastic members (32, 33) and intermediate support elements (45 ), each intermediate support element (45) being interposed between two elastic members (32, 33) of the same group in order to arrange them in series, the intermediate support elements (45) being integral in rotation in such a way that the elastic members (32, 33) of each of the groups deform in phase with each other;

- a pendulum damper (49) comprising a support member (50) movable in rotation around the axis O and pendulum weights (51) movably mounted on the support member (50);

in which the support member (50) is secured in rotation to the intermediate support elements (45) via fixing members (46) passing through the sealing means (63, 64) in a sealed manner , 67, 68, 69, 70) extending between the primary flywheel (2) and the secondary flywheel (3).

2. Double shock-absorbing flywheel (1) according to claim 1, in which the sealing means comprise a sealing washer (63, 67), elastically deformable, comprising an external end edge pressed against the primary flywheel (2) and having orifices (65) for the passage of the fixing members of the support member (50) to the intermediate support elements (45) , said sealing washer (63, 67) being secured in rotation to the intermediate support elements (45) and to the support member via the fixing members (46).

3. Double shock absorber flywheel (1) according to claim 2, in which the fixing members (46) each comprise a shoulder having a diameter greater than the orifices (65) for passage of the fixing members and in which the sealing washer ( 63, 67) is pressed against said shoulders.

4. Double shock absorber flywheel (1) according to claim 3, in which the sealing washer (63, 67) is pinched between the shoulder of the fixing members (46) and the support member (50) of the pendulum weights (51).

5. Double shock-absorbing flywheel (1) according to claim 4, in which the sealing means comprise a second elastically deformable sealing washer (68) comprising an internal end edge fixed on the secondary flywheel (3) and an edge outer end pressed against the support member (50) of the weights (51).

6. Double shock-absorbing flywheel (1) according to claim 5, comprising two guide washers (34, 35) comprising windows (38) extending circumferentially, intended to each accommodate a group of elastic members (32, 33) and comprising radial support zones intended to support the ends of the elastic members (32, 33), said guide washers (34, 35) being integral in rotation with the secondary flywheel (3), the second sealing washer ( 68) being pinched between one of the guide washers (34) and the secondary flywheel (3) in order to ensure its attachment to the secondary flywheel (3).

7. Double shock-absorbing flywheel (1) according to claim 2 or 3, wherein the sealing washer (63) extends radially to a radially internal portion of the secondary flywheel.

8. Double shock-absorbing flywheel (1) according to claim 7, wherein the sealing washer (63) comprises at its internal edge baffles making it possible to produce a seal, without contact with the secondary flywheel (3).

9. Double shock absorber flywheel (1) according to any one of claims 2 to 8, in which the sealing washer (63, 67) is an elastically deformable frustoconical metal sheet mounted pre-stressed.

10. Double shock-absorbing flywheel (1) according to any one of claims 1 to 9, in which the primary flywheel comprises a central hub (5), radially internal, carrying a bearing (4) for centering the secondary flywheel (3), an annular portion (6) extending radially, a cylindrical portion (7) extending axially and an annular cover (8) fixed on the cylindrical portion (7), the sealing means extending between the annular cover ( 8) and the secondary flywheel (3).

11. Hybrid architecture comprising a double damping flywheel according to one of the preceding claims, an electric machine comprising a stator and a rotor and a clutch making it possible to couple or uncouple in rotation the double damping flywheel to the rotor of the electric machine.

12. Double shock-absorbing flywheel (1) for a motor vehicle comprising:

• a first damping stage, arranged to couple in rotation the primary flywheel (2) and an intermediate web (27), comprising curved elastic members (28), housed in the annular chamber (9); And

• a second damping stage, arranged to couple in rotation the intermediate web (27) and the secondary flywheel (3), comprising a plurality of groups of elastic members (32, 33) and intermediate support elements (45 ), each intermediate support element (45) being interposed between two elastic members (32, 33) of the same group in order to arrange them in series, the intermediate support elements (45) being integral in rotation in such a way that the elastic organs of each of the groups deform in phase with each other; - a pendulum damper (49) comprising a support member (50) movable in rotation around the axis O and pendulum weights (51) movably mounted on the support member (50);

in which the support member (50) is integral in rotation with the intermediate support elements (45) and in which the pendulum damper (49) extends outside the annular chamber (9).

13. Double shock-absorbing flywheel (1) according to claim 12, in which the secondary flywheel (3) comprises a rear face, arranged opposite the primary flywheel (1), comprising an internal portion and an external portion offset axially forward relative to the internal portion and in which the pendulum weights (51) extend in an annular space (60, 81) provided axially between the primary flywheel (1) and the external portion of the rear face of the flywheel secondary (3).

14. Double shock absorber flywheel (1) according to claim 13, in which the pendulum weights (51) extending at a radial distance from the axis O substantially equal to that of the curved elastic members (28) of the first damping stage .

15. Double shock-absorbing flywheel (1) according to claim 13 or 14, in which said internal and external portions of the rear face of the secondary flywheel are connected by a cylindrical surface and in which the support member (50) is guided in rotation on the secondary flywheel (3) via a bearing (62, 66) supported by said cylindrical surface.

16. Double shock-absorbing flywheel (1) according to claim 13 or 14, in which the primary flywheel (2) comprises a central hub (5) which supports a bearing (5) for guiding the secondary flywheel (3) in rotation and in which the support member (50) is guided in rotation on the primary flywheel (2) via a guide bearing (74, 79) supported by said central hub (5), the support member comprising a ring (58) providing support for the weights (51) and an internal hub (57) cooperating with the guide bearing (74, 79) of the support member, the ring (58) and the internal hub (57) being arranged on either side of the secondary steering wheel (3) and secured by means of fixing members (72, 75) passing through orifices (71) provided in the secondary steering wheel (3).

17. Double shock-absorbing flywheel (1) according to any one of claims 13 to 16, in which the primary flywheel (2) carries a cylindrical rim radially external (61) covering the annular space (60) in which the pendulum weights (51) extend.

18. Double damping flywheel (1) according to claim 12, in which the secondary flywheel (2) comprises a front face comprising an annular friction surface intended to form a reaction plate of a clutch, and an annular recess (84) extending radially inside the annular friction surface and providing an annular space (83) for housing the pendulum weights (51) and the support member (50), and in which the support member ( 50) is secured to the intermediate support elements (45) via fixing members (46, 86) passing through orifices (85) provided in the secondary flywheel (3).

19. Double shock-absorbing flywheel (1) according to any one of claims 12 to 18, comprising sealing means (63, 64, 67, 68, 69, 70) extending between the primary flywheel (2) and the secondary steering wheel (3), making it possible to ensure the sealing of the annular chamber (9) and in which the support member (50) is secured in rotation to the intermediate support elements (45) via of fixing members (46) passing through said sealing means in a sealed manner.

20. Double shock-absorbing flywheel (1) according to claim 19, in which the sealing means comprise a sealing washer (63, 67), elastically deformable, comprising an external end edge pressed against the primary flywheel (2) and having orifices (65) for the passage of the fixing members (46) of the support member (50) to the intermediate support elements (45), said sealing washer (63, 67) being secured in rotation to the intermediate support elements (45) and to the support member (50) via the fixing members (46).

21. Double damping flywheel (1) according to claim 20, in which the fixing members (46) comprise a shoulder having a diameter greater than the diameter of the orifices (65) of the sealing washer (63, 67), said washer sealing (63, 67) being pressed against said shoulders.

22. Hybrid architecture comprising a double damping flywheel according to one of claims 12 to 21, an electric machine comprising a stator and a rotor and a clutch making it possible to couple or uncouple in rotation the double damping flywheel to the rotor of the electric machine.

23; Double shock-absorbing flywheel (1) for a motor vehicle comprising:

- a primary flywheel (2), intended to be fixed to a driving shaft, and a secondary flywheel (3), movable in rotation relative to each other around an axis of rotation O;

- a torsion damper with elastic members for transmitting a torque and damping rotational acyclisms between the primary (2) and secondary flywheels (3), said torsion damper with elastic members comprising a plurality of groups of elastic members (32, 33) and intermediate support elements (45), each intermediate support element (45) being interposed between two elastic members (32, 33) of the same group in order to arrange them in series, the support elements intermediates (45) being integral in rotation such that the elastic members (32, 33) of each of the groups deform in phase with each other; And

in which the support member (50) is secured in rotation to the intermediate support elements (45) and cooperates with one of the primary (2) and secondary (3) flywheels via a bearing (62 , 66, 74, 79, 89, 90) for guiding in rotation.

24. Double shock-absorbing flywheel (1) according to claim 23, in which the primary flywheel (2) comprises a central hub (5) and in which the secondary flywheel (3) is guided in rotation on the central hub (5) of the flywheel primary via a bearing (4).

25. Double shock-absorbing flywheel (1) according to claim 24, in which the bearing (74, 79) for guiding the support member (50) in rotation is carried by the central hub (5) of the primary flywheel (2) .

26. Double shock absorber flywheel (1) according to claim 25, in which the support member comprises a ring (58) ensuring the support of the weights (51) and an internal hub (57) intended to ensure the centering of the member support (50), the ring (58) and the internal hub (57) being arranged on either side of the secondary steering wheel (3) and secured via fixing members (72, 75) passing through orifices (71) provided in the secondary steering wheel (3), the ring (58) being arranged in an annular space (60, 81) extending between the steering wheel primary (2) and the secondary flywheel (3) and the internal hub (57) cooperating with the bearing (74, 79) carried by the central hub (5) of the primary flywheel (2).

27. Double shock-absorbing flywheel (1) according to any one of claims 23 or 24, in which the secondary flywheel (3) comprises a cylindrical surface carrying the bearing (62, 66, 89, 90) for guiding the rotation of the support member (50).

28. Double shock-absorbing flywheel (1) according to claim 27 wherein the secondary flywheel (3) comprises a rear face, arranged opposite the primary flywheel (2), comprising an internal portion and an external portion offset axially towards the front in relation to the internal portion, said internal and external portions being connected by the cylindrical surface carrying the bearing (62, 66) for guiding the support member (50) in rotation.

29. Double shock-absorbing flywheel (1) according to claim 28, in which the weights (51) extend in an annular space (60, 81) extending axially between the external portion of the rear face of the secondary flywheel (3) and the primary flywheel (2).

30. Double damping flywheel (1) according to claim 27, in which the secondary flywheel comprises a front face comprising an annular friction surface intended to form a reaction plate of a clutch, and an annular recess (84), extending radially inside the annular friction surface, providing an annular space (83) for housing the pendulum weights (51) and the support member (50), the cylindrical surface carrying the guide bearing (89, 90) being formed in an internal edge of the recess, and in which the support member (50) is secured to the intermediate support elements (45) via fixing members (46, 86) passing through holes (85) provided in the secondary flywheel (3).

31. Double damping flywheel (1) according to any one of claims 23 to 30, in which the primary flywheel (2) comprises an annular chamber (9) filled with a lubricating agent, in which the torsion damper with elastic members includes:

• a first damping stage comprising curved elastic members (28), housed in the annular chamber (9), arranged to couple in rotation the primary flywheel (2) and an intermediate web (27); And • a second damping stage comprising the plurality of groups of elastic members (32, 33) arranged in series via the intermediate support elements (45);

and in which the support member (50) extends outside the annular chamber (9).

32. Double shock-absorbing flywheel (1) according to any one of claims 23 to 31, in which the bearing (62, 66, 74, 79, 89, 90) for guiding the support member (50) in rotation is a plain bearing or a rolling bearing.

33. Hybrid architecture comprising a double damping flywheel according to one of claims 23 to 32, an electric machine comprising a stator and a rotor and a clutch making it possible to couple or uncouple in rotation the double damping flywheel to the rotor of the electric machine.