FR3130343A1 - Pendulum damping device - Google Patents

Abstract

Pendulum damping device (1), comprising: - a support (2) able to move in rotation around an axis (X), - a plurality of pendulum bodies (3), each pendulum body (3) being movable relative to the support (2), and - a plurality of rolling members (11), each rolling member (11) cooperating with a first rolling track (12) secured to the support (2) and with at least a second rolling track (13) integral with a pendulum body (3), the movement of each pendulum body (3) relative to the support (2) being guided by two of these rolling members (11), the support (2) comprising a plurality of windows (10) in each of which two rolling members (11) are received, one of these rolling members (11) cooperating with at least one second rolling track (13) integral with one of the bodies pendulums (3) and the other of these rolling members (11) cooperating with at least one second rolling track (13) integral with another of these pendulum bodies (3), the said pendulum bodies (3) being circumferentially adjacent , two circumferentially neighboring pendulum bodies (3) each comprising a first abutment damping member (30) arranged so as to come into contact when these two circumferentially neighboring pendular bodies (3) come into abutment against one another, each of these first abutment damping members (30) being arranged in the same window (10) of the support (2), each first abutment damping member (30) having elastic properties. Abstract Figure: Fig. 3

Description

Pendulum damping device

The present invention relates to a pendular damping device, in particular for a motor vehicle transmission system.

The present invention relates to a pendular damping device, in particular for a motor vehicle transmission system.

In such an application, the pendular damping device can be integrated into a torsion damping system of a clutch able to selectively connect the heat engine to the gearbox, in order to filter the vibrations due to the acyclisms of the engine. Such a torsion damping system is for example a double mass flywheel.

The pendulum damping device can be integrated with a friction clutch disc or a hydrodynamic torque converter or a flywheel integral with the crankshaft or a dry or wet double clutch or a simple wet clutch or a group hybrid powertrain.

Such a pendular damping device conventionally implements a support and one or more movable pendular bodies relative to this support, the movement relative to the support of each pendular body being guided by two rolling members cooperating on the one hand with rolling tracks secured to the support, and on the other hand with rolling tracks secured to the pendular bodies. Each pendulum body comprises for example two pendulum masses riveted together and its movement relative to the support is guided by two rolling members received in one or more windows of the support.

It is known from patent EP 3 101 312 to arrange in each window made in the support two rolling members associated with separate pendular bodies in order to reduce the number of windows in the support and thus improve its mechanical strength. There is a need to further improve such a pendular damping device.

The object of the invention is to meet this need and it achieves this, according to one of its aspects, with the aid of a pendular damping device, comprising:

- a support able to move in rotation around an axis,

- a plurality of pendulum bodies, each pendulum body being movable relative to the support, and

- a plurality of rolling members, each rolling member cooperating with a first rolling track secured to the support and with at least one second rolling track secured to a pendulum body, the displacement of each pendulum body relative to the support being guided by two of these running gears,

the support comprising a plurality of windows in each of which two running gears are received, one of these running gears cooperating with at least one second rolling track secured to one of the pendular bodies and the other of these running gears cooperating with at least a second running track secured to another of these pendular bodies, said pendular bodies being circumferentially adjacent,

two circumferentially neighboring pendular bodies each comprising a first abutment damping member arranged so as to come into contact when these two circumferentially neighboring pendulum bodies come into abutment against one another, each of these first abutment damping being arranged at least partly in the same window of the support, each first abutment damping member having elastic properties,

characterized in that the two circumferentially neighboring pendular bodies have circumferentially facing ends such that, in particular by their shape, during said coming into abutment of these two circumferentially neighboring pendular bodies against each other:

- each first abutment damping member compresses in contact with the other first abutment damping member, then

- The circumferentially opposite ends of the two pendular bodies come directly into contact so as to ensure the abutment between these circumferentially neighboring pendular bodies.

According to the invention, the coming into abutment of two circumferentially neighboring pendular bodies takes place in two stages:

- damping is first obtained by the compression of the first two abutment damping members which come into contact with each other, then

- A firm stop between the two circumferentially neighboring pendular bodies is produced by the contact between the circumferentially facing ends of these two pendular bodies. This hard stop corresponds for example to a metal/metal contact.

This protects the first abutment damping members from an excessive degree of compression which, exerted repeatedly, could wear them out, or even destroy them.

Each first abutment damping member is for example exclusively contained in a window of the support. As a variant, each first abutment damping member can not only extend into a window provided in the support but also project axially on either side of this window. As will be seen later, each pendulum body may comprise two pendulum masses between which the support is axially arranged, and there may then exist planes perpendicular to the axis of rotation of the support in which the first abutment damping member is disposed beyond a circumferential end of a pendular mass.

The first abutment damping member is for example made of elastomer or rubber.

Each of the windows formed in the support may have a closed outline, and part of this outline may then define the first rolling track with which one of the rolling members received in this window cooperates and guiding the movement of one of the bodies pendulums, while another part of this contour defines the first running track with which the other rolling member received in this window cooperates and guiding the movement of the neighboring pendulum body circumferentially.

For the purposes of this application:

- "axially" means "parallel to the axis of rotation of the support",

- "radially" means "along an axis belonging to a plane orthogonal to the axis of rotation of the support and intersecting this axis of rotation of the support",

- "angularly" or "circumferentially" means "around the axis of rotation of the support",

- “orthoradially” means “perpendicular to a radial direction”,

- "united" means "rigidly coupled", and

- the rest position of the device is that in which the pendular bodies are subjected to a centrifugal force, but not to torsional oscillations originating from the acyclisms of the heat engine.

Each rolling member can cooperate with the rolling track secured to the support and with the rolling track(s) secured to the pendular body only via its outer surface. Thus, the same portion of this outer surface can roll alternately on the rolling track secured to the support and on a rolling track secured to the pendulum body when the rolling member moves.

Each rolling member is for example a roller of circular section in a plane perpendicular to the axis of rotation of the support. This roller may comprise several successive cylindrical portions of different radius. The axial ends of the roll may be devoid of a thin annular flange. The roller is for example made of steel. The roll can be hollow or solid.

The shape of the first and second rolling tracks can be such that each pendular body is only moved relative to the support in translation around a fictitious axis parallel to the axis of rotation of the support.

Alternatively, the shape of the rolling tracks can be such that each pendular body is moved relative to the support at the same time:

- in translation around a fictitious axis parallel to the axis of rotation of the support and,

- Also in rotation around the center of gravity of said pendular body, such a movement being also called "combined movement".

The device comprises for example a number comprised of pendulum bodies comprised between two and eight, in particular three or six pendulum bodies. All these pendular bodies can succeed each other circumferentially. The device can thus comprise a plurality of planes perpendicular to the axis of rotation in each of which all the pendular bodies are arranged.

In all of the above, the support can be made in one piece, being for example entirely metallic.

Each pendulum body may comprise at least one second abutment damping member for the abutment of this pendulum body against the support.

Each of these second abutment damping members can then come into contact with the support to dampen the abutment of the pendular body against the latter, for example:

- after movement in the trigonometric direction of this pendular body from the rest position, or

- following a movement in the non-trigonometric direction of this pendular body from the rest position, or

- in the event of a radial fall of the pendular body, for example when stopping the vehicle's internal combustion engine.

Each pendulum body comprises, for example, two second abutment damping members, and one of these second abutment damping members dampens the abutment of the pendulum body against the support: after a movement in the trigonometric direction , from the rest position, and in the event of a radial fall of the pendulum body and the other of these second abutment damping members dampens the abutment of the pendulum body against the support: after a movement in the direction non-trigonometric from the rest position, and in the event of a radial fall of the pendular body. Similar to the first abutment damping members, the second abutment damping members may have elastic properties, the latter then allowing the damping of shocks related to the contact between the support and the pendular body. This damping is then enabled by compression of the second abutment damping member.

A first abutment damping member and a second abutment damping member can belong to one and the same part.

As a variant, each first abutment damping member constitutes a separate part from the part formed by a second abutment damping member.

In all of the above, each pendular body can include:

- a first and a second pendulum mass spaced axially with respect to each other, the first pendulum mass being disposed axially on a first side of the support and the second pendulum mass being disposed axially on a second side of the support, And

- At least one connecting member of the first and second pendulum masses, matching said masses.

The first and the second pendular mass can be paired by two connecting members, each connecting member defining one of the second rolling tracks of the pendular body.

A portion of the outline of the connecting member defines, for example, the second rolling track. Alternatively, a coating deposited on this portion of the outline of the connecting member defines the second rolling track.

Such a connecting member is for example press-fitted via each of its axial ends into an opening formed in one of the pendular masses. Alternatively, the connecting member can be welded via its axial ends to each pendulum mass. As a further variant, the connecting member can be screwed or riveted onto each pendulum mass.

Each pendular body can then comprise two connecting members matching the first and the second pendular mass, each connecting member defining a second rolling track cooperating respectively with one of the two rolling members guiding the movement of this pendular body relative to the support. Each rolling member then cooperates with a single second rolling track.

In this case, each window receiving two rolling members can also receive a connecting member of a pendulum body and a connecting member of the neighboring pendulum body circumferentially. In each window is then:

- a connecting member for a pendular body and a rolling member guiding the movement of this pendular body, and

- a connecting member of another pendular body and a rolling member guiding the movement of this other pendulum body.

Each rolling member can then only be stressed in compression between the first and second rolling tracks mentioned above. These first and second rolling tracks cooperating with the same rolling member can be at least partly radially opposite each other, that is to say that there are planes perpendicular to the axis of rotation in which these rolling tracks both extend.

Such a pendular damping device thus has a very small number of passages provided in the support since, for a number n of pendular bodies, n windows allow the guidance of these n pendular bodies and the connection between the pendular masses of each of these pendulum bodies.

Each pendular body can extend angularly over an overall angle value measured from the axis of rotation between two circumferential ends which correspond to the circumferential ends of the pendular masses of this body, each second rolling track being disposed inside an angular sector measured from the axis of rotation and extending from one circumferential end of the pendulum body towards the other circumferential end of this pendulum body, the ratio between this angular sector and the overall angle being between 1 /15 and 1/2, being for example between 0.1 and 0.25.

Such a position of the second rolling tracks makes it possible to offset angularly each rolling member furthest towards the outside of the pendular body. In this way, the movement of each pendular body is more precise and more stable with a constant manufacturing tolerance. The amplitude of the movement of each pendular body can also be increased. Such a position of the rolling members can further increase the polar inertia of the pendular body, which is advantageous when this pendulum body exhibits the combined motion mentioned above.

When the second rolling tracks are offset angularly outwards from the pendular bodies, as mentioned previously, these windows can have a particularly reduced angular dimension.

As a variant of what has just been said, each rolling member can cooperate with two second rolling tracks integral with the pendular body, one of these second rolling tracks being defined by the first pendular mass and the other of these second rolling tracks being defined by the second pendulum mass. Each connecting member is then for example a rivet, being received in an opening of the support different from the window in which a rolling member is received. Each running gear can then successively comprise axially:

- a portion disposed in a cavity of the first pendulum mass and cooperating with the second rolling track formed by part of the contour of this cavity,

- a portion arranged in a window of the support and cooperating with the first rolling track formed by a part of the contour of this window, and

- A portion disposed in a cavity of the second pendular mass and cooperating with the second rolling track formed by a part of the contour of this cavity.

Still according to this variant in which two second rolling tracks secured to the pendular body are provided, it is possible that all or part of the connecting members of the pendular body are received in windows already receiving rolling members. Each window provided in the support then receives, for example:

- a connecting member for a pendular body and a rolling member guiding the movement of this pendular body, and

- a connecting member of another pendular body and a rolling member guiding the movement of this other pendular body.

In this case, the rolling members are then arranged radially externally with respect to the connecting members. Similar to what was mentioned previously, the number of openings made in the support to allow the guidance of the pendulum bodies and the connection between the pendulum masses of each of these pendulum bodies is then particularly reduced.

In all of the above, each first abutment damping member can be carried by a connecting member of a pendular body. In this case, two circumferentially neighboring pendular bodies may have connecting members having circumferentially facing ends such that, in particular by their shape, when these two circumferentially neighboring pendular bodies come into abutment against each other:

- each first abutment damping member compresses in contact with the other first abutment damping member, then

- The circumferentially opposite ends of the connecting members of the two pendular bodies come directly into contact so as to ensure the abutment between these circumferentially neighboring pendulum bodies.

Each first abutment damping member is for example arranged on one end of a connecting member circumferentially facing the connecting member of the neighboring pendular body circumferentially, and in the absence of compression, this first damping member abutment protrudes towards this connecting member of the neighboring pendular body circumferentially beyond the connecting member which carries it. The compression of the first abutment damping member during contact between these two circumferentially neighboring pendulum bodies causes the cancellation of this projection so that the two connecting members come into contact with each other to establish the positive abutment .

Each second abutment damping member can also be carried by a connecting member already carrying a first abutment damping member and these abutment damping members can be arranged elsewhere than on the circumferential end of a connection opposite to the circumferential end of this connecting member circumferentially facing the neighboring pendular body circumferentially. The absence of a stop damping member on this circumferential end of the connecting member makes it possible to reduce the circumferential bulk associated with the connecting member, thus leaving more room for the solid parts of the support arranged between two windows.

Each first, respectively second, abutment damping member can be rigidly fixed to the connecting member which carries it, for example by gluing.

In all of the above, each pendular body can comprise exactly two connecting members, and each connecting member can carry a single first abutment damping member and a single second abutment damping member.

In all of the above, each window in the medium can receive:

- a running gear cooperating with at least a second running track integral with one of the pendular bodies,

- a connecting member matching the first and the second pendular mass of this pendular body, this connecting member carrying a first abutment damping member,

- another running gear cooperating with at least one second running track integral with another pendulum body, said pendulum bodies being circumferentially adjacent, and

- a connecting member matching the first and the second pendular mass of this other pendular body, this connecting member carrying a first abutment damping member.

In all of the above, the device may comprise at least one interposing piece, at least part of which is axially disposed between the support and a pendular mass of the pendular body. Such an interposition part can thus limit the axial displacement of the pendulum body relative to the support, thus avoiding axial shocks between said parts, and thus undesired wear and noise, in particular when the support and/or the pendulum mass are made of metal. Several interposing pieces, for example in the form of pads, can be provided. The interposing parts are in particular made of a damping material, such as plastic or rubber.

The interposing parts are for example carried by the pendular bodies. The interposing pieces can be positioned on a pendulum body so that there is always at least one interposing piece of which at least a part is axially interposed between a pendulum mass and the support, whatever the positions relative support and said mass during movement relative to the support of the pendulum body.

In all of the above, the device may include:

- at least a first pendular body making it possible to filter a first order value of the torsional oscillations, and

- at least a second pendular body making it possible to filter a second order value of the torsional oscillations, different from the first order value.

Another subject of the invention, according to another of its aspects, is a component for a motor vehicle transmission system, the component being in particular a double damped flywheel, a hydrodynamic torque converter, a flywheel integral with the crankshaft, a double wet or dry clutch, a simple wet clutch, a hybrid powertrain component, or a friction clutch disc, comprising a pendular damping device defined above.

The invention can be better understood on reading the following description of a non-limiting example of its implementation and on examining the appended drawing in which:

- schematically represents a pendular damping device according to a first example of implementation of the invention,

- is a view similar to the , with the pendular masses axially on one side of the support not shown,

- is a detail of ,

- , And correspond to , And respectively for a second example of implementation of the invention, and

- represents in isolation a connecting member according to the second implementation example.

We represented on the a pendular damping device 1 according to an exemplary implementation of the invention. The device 1 is in particular suitable for equipping a motor vehicle transmission system. In the example considered, the pendular damping device 1 is integrated into a double damped flywheel, as will be seen later, but the invention is not limited to such an application, the device 1 being able in a variant to be integrated to a hydrodynamic torque converter, clutch disc or hybrid powertrain component.

This component can be part of a powertrain comprising a combustion engine, in particular with three or four cylinders.

On the , the device 1 is at rest, that is to say that it does not filter the torsional oscillations transmitted by the propulsion chain due to the acyclisms of the heat engine.

The device 1 comprises in the example considered:

- a support 2 able to move in rotation around an axis X, and

- a plurality of pendular bodies 3 movable relative to the support 2.

In the example of the , the support 2 is an output web of the dual mass flywheel and it comprises two tabs 9 each defining a radial extension, each of these tabs 9 receiving the torque from the combustion engine by means of springs, not shown. As can be seen on the , the two legs 9 are here diametrically opposed.

In the example considered, four pendular bodies 3 are provided, being distributed uniformly around the periphery of the axis X. The invention is of course not limited to a precise number, the number of pendular bodies possibly being in variant: two, three, five or six.

In the example considered, the support 2 generally has the shape of a ring comprising two opposite sides 4 which here are flat faces.

As can be seen in particular on the , each pendular body 3 comprises in the example considered:

- two pendulum masses 5, each pendulum mass 5 extending axially opposite one side 4 of the support 2, and

- two connecting members 6 securing the two pendulum masses 5.

On the , one of the pendular masses 5 is not represented, so as to better see the support 2.

The connecting members 6, also called "spacers", are in the example considered offset angularly. Each connecting member 6 is here offset circumferentially towards the outside of each pendular body 3.

In the example of FIGS. 1 to 3, each connecting member 6 is fixed to the first 5 and to the second 5 pendular mass of a pendular body by riveting, two rivets 17 being associated with each connecting member 6. thus securing together these two pendular masses 5. Other fixings of the connecting member to the pendular masses 5 are possible, for example screwing, welding, or force-fitting.

The device 1 further comprises rolling members 11 guiding the movement of the pendular bodies 3 relative to the support 2. The rolling members 11 are here rollers.

In the example described, the movement relative to the support 2 of each pendular body 3 is guided by two running gear 11.

Each rolling member 11 is received in a window 10 formed in the support 2. As shown in the figures, two rolling members 11 associated with two different pendular bodies 3 and circumferentially neighboring are received in the same window 10 formed in the support 2 In other words, inside the same window 10, is received a rolling member 11 guiding the movement of a pendular body 3 and a rolling member 11 guiding the movement of another pendular body 3 which is circumferentially neighbor. Each window 10 has a closed outline and part of this outline defines a first rolling track 12 secured to the support 2, on which one of the rolling members 11 received in this window 10 will roll, while another part of this closed contour defines another first rolling track 12 secured to the support 2, on which the other rolling member 11 received in the window 10 will roll.

In the example of Figures 1 to 3, each window 10 also receives:

- a connecting member 6 of a pendular body 3, and

- a connecting member 6 of another pendular body 3 which is circumferentially close.

Each connecting member 6 defines in the example of Figures 1 to 3 a second rolling track 13 which is integral with the pendular body 3 to which this connecting member 6 belongs and on which rolls one of the rolling members 11 to guide the movement of this pendular body 3 with respect to the support 2.

Each pendular body 3 also comprises two first abutment damping members 30. Each first abutment damping member 30 is here supported, for example by gluing, by a connecting member 6. and on the that each first abutment damping member 30 projects circumferentially beyond the corresponding circumferential end 32 of the connecting member 6 in the direction of the pendular body 3 circumferentially neighboring. The abutment damping member 30 is for example received in a recess 33 provided in this circumferential end 32 of the connecting member, and in the uncompressed state, it protrudes circumferentially beyond the part 34 of this circumferential end not defining the recess 33.

As will be seen later, two first abutment damping members 30 circumferentially opposite and respectively belonging to two circumferentially neighboring pendular bodies 3 come into contact with each other when these two bodies come into abutment. 3 pendulums against each other. These first abutment damping members 30 circumferentially opposite are, as shown in the , received in the same window 10 provided in the support 2.

Each pendulum body 3 also comprises two second abutment damping members 25 of this pendulum body against the support 2. Each of these second abutment damping members 25 is respectively carried by a connecting member 6 of the pendulum body 3. The one of these second abutment damping members 25 comes into contact, for example, with the support 2 after movement in the trigonometric direction of the pendular body 3 from its rest position, and also in the event of a radial fall of this pendulum body 3, while the other second abutment damping member 25 comes into contact with the support 2 following a movement in the non-trigonometric direction of the pendulum body 3 from its rest position, and if necessary also in the event of a radial fall of this pendular body 3.

Each second abutment damping member 25 is for example radially positioned between a connecting member 6 and the outline of the window 10.

In the example of Figures 2 and 3, each first abutment damping member 30 is made in one piece with a second abutment damping member 25. This part is for example made of elastomer or rubber and it extends along the radially inner edge of the connecting member 6 and along part of its circumferential end 32, without extending along the other circumferential end of this connecting member 6.

We still observe, on the , that interposing pieces 20, also called "pad" can be provided. One or more pads 20 are for example carried in a fixed manner by each pendular mass 5.

When two pendulum bodies 3 that are circumferentially neighboring each other come into abutment, two connecting members 6 belonging respectively to one and the other of these two pendulum bodies and received in the same window 10 go cooperate as follows, as can be seen in the :

- each first abutment damping member 30 respectively compresses in contact with the other first abutment damping member 30, then

- The circumferentially opposite ends 32 of these two connecting members 6 come directly into contact so as to ensure a firm stop between these circumferentially neighboring pendular bodies 3.

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

Thus, according to a second example of implementation which will now be described with reference to Figures 4 to 7, the two pendular masses 5 are connected via a plurality of rivets 17, the union of which constitutes the connecting member 6.

Each rolling member 11 cooperates here with two second rolling tracks 13 secured to the pendular body. One of these second rolling tracks 13 is defined by the first pendular mass 5 and the other of these second rolling tracks 13 is defined by the second pendular mass 5. Each rolling member 11 successively comprises axially:

- a portion disposed in a cavity 45 of the first pendulum mass 5 and cooperating with the second rolling track 13 formed by part of the contour of this cavity 45,

- a portion disposed in a window 10 of the support and cooperating with the first rolling track 12 formed by a part of the contour of this window, and

- A portion disposed in a cavity 45 of the second pendulum mass 5 and cooperating with the second rolling track 13 formed by a part of the contour of this cavity.

In this example, too, and as can be seen in FIGS. 4 and 7, each pendular mass 5 has a rivet 17 at its circumferential ends, the latter carrying a first abutment damping member 30. It can be seen that these rivets 17 have a protrusion 48 oriented opposite the neighboring pendular body circumferentially. This protrusion 48 defines according to this second example of implementation the circumferential end of a pendular body 3.

When two pendular bodies 3 neighboring circumferentially come into abutment against each other, two rivets 17 belonging respectively to one and the other of these two pendular bodies and received in the same window 10 will cooperate as follows, as can be seen in the :

- each first abutment damping member 30 respectively compresses in contact with the other first abutment damping member 30, then

- The protrusions 48 circumferentially opposite the rivets 17 of these two pendular bodies 3 come directly into contact so as to ensure a firm stop between these circumferentially neighboring pendular bodies 3.

Claims (11)

Pendulum damping device (1), comprising:
- a support (2) adapted to move in rotation around an axis (X),
- a plurality of pendulum bodies (3), each pendulum body (3) being movable relative to the support (2), and
- a plurality of rolling members (11), each rolling member (11) cooperating with a first rolling track (12) secured to the support (2) and with at least one second rolling track secured (13) to a pendulum body (3), the movement of each pendulum body (3) relative to the support (2) being guided by two of these rolling members (11),
the support (2) comprising a plurality of windows (10) in each of which two rolling members (11) are received, one of these rolling members (11) cooperating with at least one second rolling track (13) integral of one of the pendular bodies (3) and the other of these rolling members (11) cooperating with at least one second rolling track (13) integral with another of these pendular bodies (3), the said pendular bodies ( 3) being circumferentially neighbors,
two circumferentially neighboring pendular bodies (3) each comprising a first abutment damping member (30) arranged so as to come into contact when these two circumferentially neighboring pendulum bodies (3) come into abutment against each other another, each of these first abutment damping members (30) being arranged in the same window (10) of the support (2), each first abutment damping member (30) having elastic properties,
characterized in that the two circumferentially neighboring pendulum bodies (3) have circumferentially facing ends (32, 48) whose shape is such that when said abutment of these two circumferentially neighboring pendulum bodies against each other other :
- each first abutment damping member (30) is compressed in contact with the other first abutment damping member, then
- the circumferentially opposite ends (32, 48) of the two pendular bodies (3) come directly into contact so as to ensure the abutment between these circumferentially neighboring pendular bodies. Device according to the preceding claim, each pendulum body (3) comprising at least one second abutment damping member (25) for the abutment of this pendulum body against the support (2). Device according to claim 2, the first abutment damping member (30) and the second abutment damping member (25) belonging to one and the same piece. Device according to any one of the preceding claims, each pendular body (3) comprising:
- a first and a second pendulum mass (5) spaced axially with respect to each other, the first pendulum mass (5) being disposed axially on a first side (4) of the support (2) and the second mass pendulum (5) being arranged axially on a second side (4) of the support (2), and
- At least one connecting member (6) of the first and second pendular masses (5), matching said masses. Device according to claim 4, the first (5) and the second (5) pendular mass being paired by two connecting members (6), each connecting member (6) defining one of the second rolling tracks (13) of the pendular body (3). Device according to Claim 4, each rolling member (11) cooperating with two second rolling tracks (13) integral with the pendular body (3), one of these second rolling tracks (13) being defined by the first pendular mass (5) and the other of these second rolling tracks (13) being defined by the second pendular mass (5). Device according to any one of claims 4 to 6, each first abutment damping member (30) being carried by a connecting member (6) of this pendular body. Device according to claim 7, the two circumferentially neighboring pendular bodies having connecting members (6) having circumferentially facing ends (32, 48) whose shape is such that, when these two circumferentially neighboring pendulum bodies come into abutment One against the other :
- each first abutment damping member (30) is compressed in contact with the other first abutment damping member, then
- the circumferentially opposite ends (32, 48) of the connecting members (6) of the two pendular bodies come directly into contact so as to ensure the abutment between these circumferentially neighboring pendular bodies. Device according to Claim 2 and one of Claims 7 and 8, the first abutment damping member (30) and the second abutment damping member (25) being arranged elsewhere than on the circumferential end of a connecting member (6) opposite the circumferential end (32) of this connecting member circumferentially facing the neighboring pendular body circumferentially. Device according to any one of Claims 4 to 9, each window (10) receiving:
- a rolling member (11) cooperating with at least a second rolling track (13) secured to one of the pendular bodies (3),
- a connecting member (6) matching the first (5) and the second (5) pendular mass of this pendular body (3), this connecting member (6) carrying a first abutment damping member (30),
- the other rolling member (11) cooperating with at least one second rolling track (13) secured to the other pendular body (3), said pendular bodies (3) being circumferentially adjacent,
- a connecting member (6) matching the first (5) and the second (5) pendular mass of this other pendular body (3), this connecting member (6) carrying a first abutment damping member (30) . Component for a transmission system of a motor vehicle, the component
being in particular a dual mass flywheel, a hydrodynamic torque converter, a flywheel integral with the crankshaft, a dry or wet dual clutch, a single wet clutch, a component of a hybrid powertrain, or a friction disc, comprising a device for pendulum damping according to one of the preceding claims