FR3097925A1 - Torsional oscillation damping device - Google Patents

Abstract

Torsional oscillations damping device Device (1) for damping torsional oscillations comprising: - a torsional oscillations damper (3) comprising a first input element (31) capable of being connected to a driving shaft, a first output element (10), and a mechanical energy storage member (9) arranged between the first input element and the first output element, - a torque limiter (4) comprising a friction, two lids (15) and a second connecting member (43) adapted to join the two lids, - a third connecting member (44) adapted to rotate the first output element (41) and one of the lids ( 15), the third connecting member (44) being a screw. Figure for the abstract: Figure 1

Description

Torsional oscillation damping device

The present invention relates to a torsional oscillation damping device, in particular capable of being integrated into a transmission chain of a motor vehicle.

Patent application FR 3 039 613 discloses a torsion oscillation damping device comprising a torsion damping device, a torque limiter located at the input and radially above the torsion damping device and a pendular damping device located axially next to the torque limiter. This architecture makes it possible to obtain a satisfactory damping of the torsional oscillations by the device but presents a significant inertia downstream of the torque limiter, which leads to strong overtorques in the transmission chain. In addition, such an architecture is difficult to mount and maintain.

The invention aims to improve this type of device.

The subject of the invention is thus in particular a device for damping torsional oscillations, in particular for a vehicle transmission chain, comprising:
a torsional oscillation damper comprising a first input element capable of being connected to a driving shaft, a first output element, and at least one mechanical energy accumulator member arranged between the first input element and the first output element,
a torque limiter comprising a friction device, two covers and at least one second connecting member adapted to secure the two covers,
Characterized in that the device further comprises at least one third connecting member adapted to secure in rotation the first output element of the torsional oscillation damper and at least one of the covers of the torque limiter, the at least a third connecting member being a screw.

Thus, the torsional oscillation damper is integral with the torque limiter, that is to say with or without intermediate piece, which allows the torque to pass efficiently between the two elements.

This screwed connection between the torque limiter and the torsion oscillation damper makes it possible to have an independent torque limiter sub-assembly, which facilitates all assembly operations (control of the slipping torque, lapping, unbalancing, etc. ).

This architecture also makes it possible to obtain a compact device that is particularly suitable for the transmission chains of hybrid engines.

This architecture also makes it possible to obtain a particularly satisfactory damping of torsional oscillations by the device.

The torsional oscillation damper can be any damper.

The torsional oscillation damper can be a dual mass flywheel. This then includes:

a primary flywheel forming the first input element capable of being connected to a crankshaft of the combustion or hybrid engine of the vehicle,

a secondary flywheel capable of being connected, directly or indirectly, to the second input element of the torque limiter,

a plurality of elastic return members mounted one to the other in parallel between the primary flywheel and the secondary flywheel.

The at least one third connecting member is adapted to directly secure in rotation the first output element of the torsional oscillation damper and at least one of the covers of the torque limiter The friction of the torque limiter is secured in rotation of a second output element adapted to be secured in rotation to a driven shaft.

Thus, the torsional oscillation damper is directly attached to the torque limiter, that is to say without any intermediate piece, which makes it possible to obtain an axially compact device and to achieve cost savings (less than parts to be manufactured) and assembly time. One of the torque limiter covers can also participate in sealing the torsional oscillation damper.

The torque limiter is thus located as close as possible to the gearbox, which makes it possible to limit the inertia in front of the torque limiter and therefore to limit the arrival of overtorque on said torque limiter.

The friction of the torque limiter comprises a disk integral with the second output element. The elastic element is adapted to exert a predetermined axial pressure in order to compress a component integral with at least one of the covers on the disc.

As a variant, the friction of the torque limiter comprises at least one component and a disc integral with the second output element. An elastic element is adapted to exert a predetermined axial pressure in order to compress the component on the disc.

The friction component of the torque limiter is a friction lining attached to the disc.

As a variant, the friction component of the torque limiter is a friction lining fixed to at least one of the covers and to a drive plate of said torque limiter.

The device further comprises an additional torsional oscillation damper at least partially radially aligned with the at least one mechanical energy storage member of the torsional oscillation damper. Thus, torsional oscillations are particularly well damped without increasing the axial and/or radial size of the device.

The additional torsional oscillation damper is a pendulum damper. The pendulum damper is particularly suitable for filtering an order.

The pendulum damper comprises a pendulum support rotatable about the axis and at least one pendulum mass able to move freely and guided with respect to the pendulum support, the first output element of the torsional oscillation damper forming said support pendulum. The axial dimension is preserved. In addition, the use of the first output element as a pendulum support saves cost (fewer parts to manufacture) and assembly time of the device. In addition, the use of the first output element as a pendulum support allows the use of pendulum masses having a satisfactory thickness. Since the filtration performance of the pendulum damper is linked in particular to the mass of the pendulum masses, the device therefore makes it possible to effectively filter acyclisms.

The first input element of the torsional oscillation damper having at least one first window, at least one first connecting member being adapted to secure in rotation about an axis of rotation the first input element to the tree leading through at least one first window,

wherein the second output element has at least a second window, and

wherein said at least one second connecting member is movable between a locked position, in which an elastic element is prestressed so as to exert a predetermined axial pressure on the friction, and an unlocked position, in which the elastic element is at rest and the friction is rotatable.

The invention also makes it possible to easily assemble and/or disassemble the device, for example during manufacture, during maintenance and/or during tests. The at least one second connecting element is movable, in the axial direction, between the locked position and the unlocked position in order to allow angular realignment of the at least one first window with the at least one second window. More particularly, in the unlocked position, the elastic element is in the rest position, that is to say it does not exert any axial pressure on the friction, or more particularly on the at least one lining and on the disc. The covers are thus rotatable around the axis of rotation relative to the second output element, and therefore the second output element is rotatable around the axis of rotation relative to the first input element. Thus, said windows of the first input element and of the second output element can be perfectly realigned axially, thus allowing easy passage of the at least one first connecting member through said windows in order to secure the first input element to the driving shaft, which can also be called the crankshaft. This ease of assembly/disassembly makes it possible to limit the risk of breakage and to reduce the intervention time of the workforce on the parts during their maintenance, for example in the garage.

The at least one second connecting member is a screw engaged in a thread made on one of the covers of the torque limiter, said screw having a threaded rod whose thread has an axial distance greater than an axial crushing distance of the elastic element.

The elastic element at rest has a first maximum axial distance. The prestressed elastic element has a second maximum axial distance. The axial crush distance is the difference between the first maximum axial distance and the second maximum axial distance. The axial length of the screw shank thread is greater than the axial crush distance. Thus, the at least one second connecting member can engage with the threading of the covers of the torque limiter in order to release the elastic element towards the rest position while keeping the two covers of the torque limiter fixed in rotation. It is therefore not necessary to completely unscrew the at least second connecting member to release the load from the elastic member. Thus the angular realignment between the at least one second window of the second output element and the at least one first window and the at least one first connecting member of the torsional oscillation damper can be done easily, without complete dismantling of the torque limiter.

The torque limiter is dry. The torque limiter is positioned outside the space housing the at least one mechanical energy accumulator member. The positioning of the torque limiter outside this space filled with lubricant, such as grease, allows dry friction with organic linings and a Belleville spring washer allowing perfect control of the operation of the slipping torque with a minimum of axial bulk.

The torsional oscillation damper and the torque limiter are axially aligned. That is, the torsional oscillation damper and the torque limiter are axially side by side. The axial alignment of at least a part of the torsional oscillation damper with the torque limiter makes it possible to house the torque limiter as close as possible to the output, that is to say on the second element of output in order to limit the inertia downstream of the torque limiter, which significantly limits overtorque. Additionally, this alignment may allow for the addition of an additional torsional oscillation damper at least partially radially aligned with the torsional oscillation damper.

The device does not include a bearing between the first input element of the torsional oscillation damper and the second output element of the torque limiter. This absence of rolling makes it possible to limit manufacturing costs and to limit the risk of hyperstatism.

The pendulum damper can be arranged between the torsional oscillation damper and the limiter and in the direction of torque transmission. This avoids saturation of the pendulum damper because the acyclic torque is attenuated by the torsional oscillation damper. This allows the pendulum damper to work better.

The pendulum damper can be offset axially from the torque limiter.

If overtorque is applied to the torque limiter, the seal(s) may slip relative to the covers.

At least a portion of each of the two covers are spaced axially so that they frame the lining(s) and the torque limiter disc. These two covers can approach each other when moving away from the axis of rotation until they are in contact. At this contact zone, the at least one second connecting member can make it possible to secure the two lids. These two covers can therefore be fixed radially beyond the lining(s).

The torque limiter may also comprise a rotary drive plate around the axis of rotation and able to move axially. The training plate can be placed between the two lids. The drive plate can be integral in rotation with the two covers.

The lining(s) can be interposed between the drive plate and one of the covers.

When the torque limiter comprises linings arranged on either side of the disc, each can rest on one of the faces of said disc and, respectively, on one face of one of the covers and on one face of the plate. coaching.

In the event of overtorque applied to the torque limiter, the linings are arranged to be able to slide, in particular in rotation, relative to the covers and the drive plate on which they rest.

The elastic member, preferably a Belleville washer, can also be interposed between one of the two covers and the drive plate.

The elastic member can rest on the face of the drive plate opposite the face of this plate on which one or more linings rests.

The elastic member makes it possible to keep the drive plate in contact with the lining or linings, despite the wear of this or these linings. The prestressing of the elastic member makes it possible to permanently exert a calibrated pressure force on the drive plate, allowing the pinching of the lining(s) between this drive plate and the cover.

The invention also relates to a vehicle transmission chain comprising a device as described above.

The transmission chain can be part of a powertrain of a vehicle that can include a hybrid engine or an electric motor, preferably a hybrid engine.

The invention also relates to a method for mounting and/or dismounting a device as described above, the method comprising the following steps:

bring the torque limiter,

lead torsional oscillation damper,

screw or unscrew the torque limiter on the torsional oscillation damper with the at least a third connecting device.

"Vehicle" means motor vehicles, which include not only passenger vehicles but also industrial vehicles, which includes in particular heavy goods vehicles, public transport vehicles or agricultural vehicles, but also any transport vehicle allowing to move a living being and/or an object from one point to another.

The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of non-limiting example with reference to the appended drawings in which:

is a sectional view of an example of a torsional oscillation damping device according to the invention, the at least one second connecting member being in the locked position.

is a view according to a second section of the torsional oscillation damping device of Figure 1.

is the sectional view in Figure 1, the at least one second connecting member being in the unlocked position.

is a perspective cross-sectional view of the torsional oscillation damping device of Figure 1.

There is shown in Figures 1 to 3 a torsional oscillation damping device 1 for a vehicle transmission chain comprising a torsional oscillation damper 3 and a torque limiter 4.

The torsional oscillation damper 3 may comprise comprising a first input element, a first output element, at least one first connecting member (not shown) and at least one mechanical energy accumulator member. The first input element and the first output element are both rotatable about an X axis of rotation. The first input element may be a primary flywheel 31. The first input element is able to be connected to a driving shaft also called a crankshaft. The first input element comprises at least one first window 32, and preferably a plurality of first windows 32. The at least one first connecting member is adapted to secure the primary flywheel 31 in rotation with the drive shaft. The torsional oscillation damper 3 preferably comprises a plurality of first connecting members. The torsional oscillation damper 3 may comprise as many first connecting members as first windows 32. The torsional oscillation damper 3 preferably comprises a plurality of mechanical energy accumulator members arranged between the elements of entry and exit. In the example considered, the mechanical energy accumulator members are 9-curved springs which go against the pivoting of the first input element with respect to the first output element.

In the example considered, the torsional oscillation damper 3 comprises an annular veil 10 forming the first output element of the torsional oscillation damper 3. The veil 10 may comprise at least two arms extending radially from the annular main body of said veil 10. The springs 9 can be received between two arms of the veil 10. The springs 9 can be held axially by the primary flywheel 31 and by a connecting piece 40 and radially by the primary flywheel 31 and the veil 10 so that they cannot escape.

Alternatively, the torsional oscillation damper 3 comprises an annular veil 10 forming the first output element of the torsional oscillation damper 3 and two guide washers. These two guide washers can be mounted on either side of the web 10 and windows are made in the web 10 and in the guide washers to receive the springs 9. In addition, the guide washers axially maintain these springs 9 so they can't escape.

The springs 9 can be housed in a space defined between the first input element and the torque limiter 4. This space can be filled with grease in order to facilitate operation and prolong the life of the springs 9. This space can be waterproof. The torsional oscillation damper 3 may further comprise a sealing washer 11. The sealing washer 11 may be adapted to create the seal of the space comprising the springs 9. The sealing washer 11 may be in contact with the torsional oscillation damper 3 and the torque limiter 4. The sealing washer 11 can allow axial centering between the torsional oscillation damper 3 and the torque limiter 4 by creating a support between the torsional oscillation damper 3 and the torque limiter 4. A counter support can be achieved between the web 10 and a friction washer carried by the primary flywheel 31.

The torque limiter 4 includes friction. The friction of the torque limiter 4 may comprise at least one component and a disk 6 integral in rotation with the second output element of the torque limiter 4. The component of the friction of the torque limiter 4 may be a friction lining 5 fixed on the disc. Alternatively, the friction component of the torque limiter 4 may be a friction lining 5 fixed to at least one of the covers 15 and to a drive plate 16 of said torque limiter 4.

The second output element can be a hub 41. The hub 41 is adapted to be connected to a driven shaft (not represented here) which can connect the device 1 to a gearbox. This hub 41, rotating around the X axis, is able to transmit a torque to a driven shaft. Hub 41 may include at least one second window 42, and preferably as many second windows 42 as primary flywheel 31 includes first windows 32. Each second window 42 is axially aligned with a first window 32. Each second window 42 is adapted to allow the passage of one of the first connecting members in order to facilitate the assembly of the device on the transmission chain.

In the example considered, the torque limiter 4 is axially beyond the torsional oscillation damper 3 and the disc 6 of the torque limiter 4, plane, is fixed to the hub 41 by a plurality of rivets.

The positioning of the torque limiter 4 outside the space containing grease and housing the springs 9 makes it possible to have a torque limiter 4 dry. The dry torque limiter 4 allows dry friction with organic friction linings 5 allowing perfect operating control of the sliding torque to be obtained with a minimum of axial bulk of the torque limiter 4.

Two linings 5 in the form of an annular disc with an axis X of rotation are arranged on either side of the disc 6 of the limiter (one lining on each side - the linings 5 and the disc 6 having flat facing surfaces perpendicular to the X-axis). The linings 5 can be fixed on this disc 6, for example by a plurality of rivets. Alternatively, the fittings 5 can be fixed on at least one of the covers 15 and on the drive plate 16, and preferably each respectively on one of the covers 15, for example by a plurality of rivets.

It will be noted that in the example considered, linings 5 in the form of disc portions can be arranged on either side of the disc 6 to replace the lining in the form of an annular disc.

The torque limiter 4 further comprises two concentric X-axis drive covers 15, integral with one another, and the drive plate 16 rotatable around the X axis, able to move axially, arranged between the two drive covers 15 and integral in rotation with these two covers 15.

The fittings 5 are interposed between the drive plate 16 and one of the drive covers 15 so that they are permanently supported on one side of one of the drive covers 15 and on one side of the drive tray. training 16.

In the event of overtorque applied to the torque limiter 4, the fittings 5 are arranged to be able to slide in rotation relative to the drive cover 15 and the drive plate 16 on which they rest. Alternatively, when the fittings 5 are integral in rotation with the covers 15 and the drive plate 16, they are arranged to be able to slide in rotation relative to the disc 6 on which they rest in the event of overtorque applied to the torque limiter 4 .

In the example considered, an elastic member, here a Belleville washer 18, is interposed axially between the other of the two covers 15 and the drive plate 16. The Belleville washer 18 can rest on the face of the drive plate. drive 16 opposite the face of this drive plate 16 on which the lining 5 rests. This Belleville washer 18 keeps the drive plate 16 in contact with the linings 15, despite the wear of these linings 5. The Belleville washer 18 is prestressed so as to permanently exert a predetermined axial pressure on the drive plate 16 allowing the pinching of the linings 5 between this drive plate 16 and the cover 15. When the Belleville washer 18 is at the rest, it exerts insufficient axial pressure on the drive plate 16 not allowing the pinching of the fittings 5 between this drive plate 16 and the cover 15. The fittings 5 are then free to slide in rotation relative to the cover 15 even without overtorque.

In the example considered, the assembly formed by the fittings 5 and the disc 6 to which they are riveted is arranged to be able to slide in rotation relative to the covers 15 and to the drive plate 16 in the event of overtorque applied to the torque limiter. pair 4.

The two covers 15 therefore frame the linings 5 and the disc 6 and when one moves away from the X axis these two covers 15 approach each other until they are in contact. At this contact zone, a plurality of second connecting members makes it possible to secure the two covers 15. Each member of the plurality of second connecting members can be a screw 43. Each screw 43 can comprise a rod and a head. Each screw 43 can be moved axially between a locked position and an unlocked position. In the locked position, each screw 43 is adapted to pre-stress the Belleville washer 18 so as to exert the predetermined axial pressure on the friction and more particularly on the at least one lining and the disk. In the unlocked position, each screw 43 is adapted to allow the Belleville washer 18 to be at rest so that the disk 6 and the linings can rotate relative to the covers 15, or relative to the disk 6, without passage of overtorque. This absence of load allows an angular realignment of the plurality of first windows 32 with the plurality of second windows 42.

The two covers 15 comprise at least one thread 45. Preferably, the two covers comprise a plurality of threads 45 and more particularly one thread 45 per screw 43. Each screw 43 is adapted to engage in a thread 45 in order to secure rotate both lids. One of the two covers 15 comprises a thread 45 which may have an axial distance D45.

When the Belleville washer 18 is at rest, it can have a first maximum axial distance D18. The prestressed Belleville 18 washer can have a second maximum axial distance D19. Belleville washer 18 may have an axial crush distance. The axial crushing distance is the difference between the first maximum axial distance D18 and the second maximum axial distance D19. The shank of the screw 43 may include an axial length D43 of thread greater than the axial crushing distance of the Belleville washer 18.

Thus, each screw 43 can be in engagement with the thread 45 in order to allow the movement of the Belleville washer 18 towards the rest position while maintaining integral in rotation the two covers 15 of the torque limiter 4. It is therefore not necessary to completely unscrew the screws 43 to release the load from the Belleville washer 18. Thus the angular realignment between each second windows 42 of the hub 41 and each first windows 32 and first connecting members of the torsional oscillation damper 3 can be done easily, without completely dismantling the torque limiter 4.

The axial distance D45 of the thread 45 may be greater than the axial length D43 of the screw shank thread 43. Alternatively, the axial distance D45 of the thread 45 may be equal to the axial length D43 of the screw shank thread 43.

The two covers 15 are therefore secured radially above the linings 5 and axially at the same level, these two covers 15 are secured in rotation to the first output element of the torsional oscillation damper 3, namely the web 10. More in particular, the connecting piece 40 can fasten the torque limiter 4 to the torsional oscillation damper 3 in rotation. The connecting piece 40 can form one of the covers 15 of the torque limiter 4. Thus, the one of the covers 15, i.e. the connecting piece 40, is directly, that is to say without any intermediate piece, integral in rotation with the veil 10 of the torsional oscillation damper 3. The connecting piece 40 allows thus to obtain an axially compact device 1 and to achieve cost savings (fewer parts to be manufactured) and assembly time. This attachment can be achieved by at least one third connecting member 44 and preferably by a plurality of third connecting members 44. Each third connecting member 44 can be a screw. This screwed connection makes it possible to have an independent torque limiter sub-assembly 4 which facilitates assembly operations (control of the slipping torque, lapping, unbalancing, etc.). This screwed connection also makes it possible to radially center the torque limiter sub-assembly 4 with respect to the rest of the device 1.

Thus, in the example considered, the torque is transmitted from the engine flywheel 21 to the torsional oscillation damper 3 then, via the veil 10 forming the first output element, to the torque limiter 4 itself. -even secured to the output hub 41.

In the example considered, the torque limiter 4 is centered on the hub 41 via the disc 6.

Device 1 may further comprise an additional torsional oscillation damper.

The additional torsional oscillation damper can be one or more springs in series.

Alternatively, the additional torsional oscillation damper can be a pendulum damper 2. The pendulum damper 2 is suitable for damping torsional oscillations. The pendulum damper 2 may comprise a pendulum support 25 rotatable around the axis X and a plurality of pendulum masses 26. This pendulum damper 2 may be integral with the torsional oscillation damper 3 via the pendulum support 25. More in particular, the veil 10 of the torsional oscillation damper 3 can form the pendulum support 25. This pendulum damper 2 can be at least partially aligned radially with the torsional oscillation damper 3.

In the example considered, the pendulum damper 2 is on the path taken by the couple.

In the example considered, the pendulum damper 2 is arranged between the torsional oscillation damper 3 and the torque limiter 4 and in the direction of the torque transmission.

In the example considered, the pendulum damper 2 is arranged radially under the springs 9.

In the example shown, the pendulum damper 2 is housed in the space comprising the springs 9. Thus, the grease contained in said space can also lubricate the pendulum damper 2.

The pendulum masses 26, mounted on the periphery of the pendulum support 25, are able to move freely relative to this support while being guided by the latter.

The pendulum masses 26 are each driven in a pendulum motion in operation and comprise two parts 27 mounted axially on either side of the pendulum support 25 and interconnected by two spacers 28 each passing through an opening of the pendulum support 25. A roller 29 cooperates with two rolling tracks, each formed in an opening of a part 27 of the pendular mass 26, and with a third rolling track formed by the edge of an opening of the pendulum support 25 different from the openings of the dedicated pendulum support to spacers.

Alternatively, the roller 29 cooperates with a rolling track provided on the spacer 28 and with a second rolling track formed by the edge of the opening of the pendular support 25 dedicated to the spacer.

In each of these cases, several rollers 29 can be provided for each pendular mass 26.

Preferably, the pendulum mass 26 and the fittings 5 of the torque limiter 4 are offset axially.

In response to torsional oscillations or rotational acyclisms, each pendular mass 26 moves so that its center of gravity oscillates in a pendulum fashion.

In the example considered, the pendular masses 26 and the linings 5 are offset axially and they can partially overlap when looking at the device 1 along the X axis.

The movement zones of the pendular masses 26 or of the linings 5 are the set of positions occupied by these pendular masses and these linings.

The pendular masses 26 all describe the same zone of movement, this zone of movement overlaps axially and partially with the zone of movement described by the fittings 5. In certain configurations of the device 1, there is at least one axis parallel to the axis X crossing both a trim 5 and a pendular mass 26.

The device 1 does not include a bearing between the primary flywheel 31 of the torsion oscillation damper 3 and the hub 41 of the torque limiter 4. This absence of bearing makes it possible to limit the manufacturing costs and to limit the risk of hyperstatism. The bearings are not necessary for the device 1 because the latter already has centering means. The torque limiter 4 is centered by the hub 41. In addition, the connecting piece 40 may include a recess 40a adapted to have a small clearance with the inside of the hub 41 in order to radially center the connecting piece 40 with respect to the hub 41, and therefore with respect to the torque limiter 4. In addition, a disc ensures the radial centering between the primary of the torsional oscillation damper 3 and the connecting piece 40.

When an operator wants to assemble the device 1, he takes the torsional oscillation damper 3 and the torque limiter. Then, he assembles together the torsional oscillation damper 3 and the torque limiter 4. To do this, he screws the torque limiter 4 onto the torsional oscillation damper 3 via the third connecting members 44. Then, he moves the screws 43 from the locked position to the unlocked position in order to axially align the first and second windows 32, 42 as is particularly visible in FIG. 4. Then, he moves the screws 43 from the position unlocked to the locked position in order to place the torque limiter in the optimum operating position. The operator can then weld the cover of the torsional oscillation damper 3 onto the primary flywheel 31. At this moment, the torsional oscillation damper 3 and the torque limiter 4 form a single subassembly. Finally, on an assembly line, a new operator can secure the device 1 to the driving shaft using the first connecting members passing through the first and second windows.

The steps, except for the first step, are the same when it comes to performing a maintenance operation on device 1.

The invention is not limited to the examples which have just been described.

Claims (11)

Device (1) for damping torsional oscillations comprising:

• a torsional oscillation damper (3) comprising a first input element (31) capable of being connected to a drive shaft, a first output element (10), and at least one mechanical energy accumulator member (9 ) arranged between the first input element and the first output element,
• a torque limiter (4) comprising a clutch, two covers (15) and at least one second connecting member (43) adapted to secure the two covers,

characterized in that the device further comprises at least a third connecting member (44) adapted to secure in rotation the first output element (41) of the torsional oscillation damper (3) and at least one covers (15) of the torque limiter (4), the at least one third connecting member (44) being a screw. Device (1) according to Claim 1, in which the at least one third connecting member (44) is adapted to directly secure in rotation the first output element (41) of the torsional oscillation damper (3) and at least one of the covers (15) of the torque limiter (4). Device (1) according to any one of the preceding claims, in which the friction of the torque limiter (4) is fixed in rotation to a second output element (41) capable of being fixed in rotation to a driven shaft. A device (1) according to any preceding claim further comprising an additional torsional oscillation damper at least partially radially aligned with the at least one mechanical energy storage member (9) of the oscillation damper torsion (3). Device (1) according to the preceding claim, in which the additional torsional oscillation damper is a pendulum damper (2). Device (1) according to the preceding claim, in which the pendulum damper (2) comprises a pendulum support (25) rotatable around the axis (X) and at least one pendulum mass (26) able to move freely and guided relative to the pendulum support (25), the first output element (10) of the torsional oscillation damper (3) forming said pendulum support (25). Device (1) according to one of the preceding claims, in which the first input element (31) of the torsional oscillation damper (3) having at least a first window (32), at least a first connecting member (33) being adapted to secure in rotation around an axis (X) of rotation the first input element to the shaft leading through the at least one first window,
wherein the second output element (41) has at least a second window (42), and
wherein said at least one second connecting member (43) is movable between a locked position, in which an elastic element (18) is prestressed so as to exert a predetermined axial pressure on the friction, and an unlocked position, in which the the elastic element is at rest and the friction is rotatable. Device (1) according to the preceding claim, in which the at least one second connecting member (43) is a screw engaged in a thread (45) made on one of the covers (15) of the torque limiter (4) , said screw having a threaded rod whose thread has an axial distance (D43) greater than an axial crushing distance of the elastic element (18). Device (1) according to any one of the preceding claims, in which the torque limiter (4) is dry. Device (1) according to any one of the preceding claims, in which the torsional oscillation damper (3) and the torque limiter (4) are aligned axially. Vehicle transmission chain comprising a device (1) according to any one of the preceding claims.