Pendulum type damping device

Abstract

A pendulum damping device (20) comprising:-a support (13) rotatable about an axis (X),-at least one pendulum body which can be moved relative to the support (13) and which comprises two pendulum masses (14) which are each axially positioned on one side of the support (13) and which are rigidly connected to each other by at least one connecting member (30), and-two rolling members (40) which are arranged on the support (13) and which are rigidly connected to each other by means of at least one connecting member (30). And a plurality of rolling members (40) guiding the movement of the pendulum body relative to the support (13), each rolling member (40) cooperating with a first raceway (42) integral with the support (13) and with a second raceway (43) integral with the pendulum body, the pendulum body comprising an abutment damping member (50) associated with the connecting member (30) and having elasticity, at least one of the pendulum masses (14) of the pendulum body comprises a portion (60) protruding axially in the direction of the other pendulum mass (14) of the pendulum body, which portion (60) exerts a clamping abutment damping member (50) in order to assist in retaining it on the connecting member (30).

Description

Technical Field

[0001] The utility model relates to a pendulum damping device, which is particularly used for a transmission system of a motor vehicle. Background Art

[0002] In such applications, the pendulum damping device can be integrated into the torsional damping system of a clutch that can selectively connect the internal combustion engine to the gearbox in order to filter vibrations caused by the non-cycling behavior of the engine. Such a torsional damping system is, for example, a dual mass flywheel.

[0003] Alternatively, the pendulum damping device can be integrated into a friction clutch plate or into a transmission system comprising a wet or dry double clutch.

[0004] For example, it is known from the application DE102018131091 to provide a pendulum damping device comprising:

[0005] - a support rotatable about an axis and comprising a lug cooperating with an elastic return member,

[0006] at least one pendulum body movable relative to the support and comprising two pendulum masses positioned axially on each side of the support, the two pendulum masses being rigidly connected to each other by a connecting member, and

[0007] - Two rolling elements guiding the movement of the pendulum relative to the support, each rolling element cooperating with a first raceway integral with the support and with a second raceway integral with the pendulum, the two second raceways of the pendulum being defined by the connecting element.

[0008] In DE102018131091, the connecting member comprises a spacer, one edge of which defines the two second raceways of the pendulum, the spacer being penetrated by a rivet which rigidly connects the two pendulum masses of the pendulum to each other. The rivets are subject to multiple stresses because they:

[0009] - absorbs the radial forces applied to the pendulum mass during centrifugal action,

[0010] - Absorption of circumferential forces which generate axial forces during the abutment of the pendulum from its rest position against the support at the end of the circumferential movement.

[0011] These multiple stresses weaken the rivet and, more generally, the connecting member of the pendulum which rigidly connects the two pendulum masses of the pendulum to each other. The rivet is therefore liable to break, rendering the pendulum unfit for its intended purpose.

[0012] There is a need to reduce the risk of damaging the connecting components of the pendulum. Utility Model Content

[0013] The purpose of the present invention is to respond to this demand, and according to one aspect of the present invention, this is achieved using a pendulum damping device, which comprises:

[0014] - a support rotatable about an axis,

[0015] at least one pendulum body movable relative to the support and comprising two pendulum masses positioned axially on each side of the support, the two pendulum masses being rigidly connected to each other by at least one connecting member, and

[0016] - two rolling elements that guide the movement of the pendulum relative to the support, each rolling element cooperating with a first raceway integral with the support and with a second raceway integral with the pendulum,

[0017] The pendulum body includes an adjacent damping member associated with the connecting member and having elasticity,

[0018] In all or some of the abutment positions of the pendulum against the support, this abutment is ensured by:

[0019] - the adjacent damping member, and

[0020] - At least one of a connecting member and a pendulum mass.

[0021] According to the invention, all impacts associated with the abutment of the pendulum against the support are not absorbed solely by the contact of the abutment damping member against the support, thereby not affecting the intermediate absorption of all these impacts by the connecting member. This protects the connecting member.

[0022] The adjacent damping member has elasticity, allowing to damp the impacts associated with the contact between the support and the pendulum. Such damping is achieved, for example, by compression of the adjacent damping member. The adjacent damping member is, for example, made of an elastomer or rubber.

[0023] The abutment of the pendulum against the support can occur in two stages:

[0024] - Damping is first achieved by compressing the adjacent damping member in contact with the support, then

[0025] - A clean abutment occurs between the connecting member or one of the pendulum masses and the support. This clean abutment corresponds to, for example, a metal / metal contact.

[0026] This also protects adjacent damping members from excessive levels of compression which, if repeatedly applied, could wear or even destroy adjacent damping members.

[0027] Within the meaning of this application:

[0028] - "axial" means "parallel to the axis of rotation",

[0029] - "radial" means "along a straight line belonging to a plane orthogonal to and intersecting the axis of rotation",

[0030] - "angularly" or "circumferentially" means "around an axis of rotation",

[0031] - "orthogonal to the radial direction" means "perpendicular to the radial direction",

[0032] - "rigid connection" means "rigid connection",

[0033] - The excitation sequence of an internal combustion engine is equal to the number of combustion events of the engine per revolution of the crankshaft;

[0034] - The rest position of the pendulum is the position in which the pendulum is subjected to the centrifugal force and is not subjected to the torsional oscillations caused by the non-cyclic behavior of the internal combustion engine. For this rest position, the abscissa value of the curve of the center of mass of the pendulum is zero,

[0035] - the order value is filtered by the pendulum damping device when the ratio between the amplitude of the torsional oscillations to the order value in the presence of the pendulum damping device and the same amplitude in the absence of the pendulum damping device is less than 0.2, in particular less than 0.1, and

[0036] - "the abutment is ensured by the abutting damping member and at least one of the connecting member and the pendulum mass" means that the forces associated with the impact between the pendulum body and the support during abutment are not absorbed solely by the abutting damping member and one or the other of the connecting member or the pendulum mass, but are distributed between these components.

[0037] According to a first embodiment, the second raceway is defined by a connecting member comprising a spacer positioned axially between the two pendulum masses and rigidly fastened to the two pendulum masses by connecting means.

[0038] According to this first embodiment, in all or some of the abutment positions of the pendulum against the support, such abutment can be ensured by:

[0039] - adjacent damping members, and

[0040] - at least one of at least one portion of one of the spacer and the pendulum mass protrudes axially in the direction of the other pendulum mass of the pendulum body and is circumferentially offset relative to the spacer.

[0041] This protruding part of the pendulum mass may or may not be made in one piece with the rest of the pendulum mass. This may be a part made by extrusion, for example.

[0042] The protruding portion of the pendulum mass may extend axially in all or part of the axial space occupied by the spacer, but be circumferentially offset relative to the spacer.

[0043] This protruding portion of the pendulum mass can be at a distance from the spacer without being in contact with the latter.

[0044] In a variant, this protruding part of the pendulum mass can be in contact with the spacer. The pendulum mass and the spacer are connected, for example, by rivets, each rivet being received in a hole formed in the spacer and in a hole formed in the pendulum mass. Before riveting the pendulum mass and the spacer, the hole in the spacer can be offset relative to the hole in the pendulum mass, for example by 0.1 mm. During the riveting process, the expansion of the rivet will re-center these holes, which will produce a tightening between the spacer and the protruding part of the pendulum mass, bringing them into contact.

[0045] The pendulum mass can have a plurality of sections that protrude axially in the direction of the other pendulum mass of the pendulum body. One section that protrudes axially in the direction of the other pendulum mass is, for example, arranged at a circumferential end of the spacer, and the section of the pendulum mass that protrudes axially in the direction of the other pendulum mass can extend circumferentially beyond the circumferential end of the spacer.

[0046] A further portion which projects axially in the direction of the further pendulum mass can also be formed radially within the spacer.

[0047] For each pendulum mass, for example three or four sections project axially in the direction of the other pendulum mass of the pendulum body.

[0048] According to this first embodiment, each pendulum mass can include at least one portion protruding axially in the direction of the other pendulum mass of the pendulum and circumferentially offset relative to the spacer, which portions, together with the adjacent damping elements, secure the pendulum against the support in all or some of the abutment positions of the pendulum against the support.

[0049] The portion protruding axially in the direction of the other pendulum mass of the pendulum may comprise a free end which may or may not be planar. When the free end is planar, it may extend in a plane perpendicular to the axis of rotation, that is to say with zero axial coordinate, or may extend obliquely with respect to the axis of rotation. When the free end of the portion protruding axially in the direction of the other pendulum mass of the pendulum is not planar, it may have a concave or convex shape, or even an irregular shape.

[0050] From one pendulum mass to another pendulum mass of the pendulum body, the projections can be circumferentially superposed, that is to say they follow one another axially. The axial projections can extend over the same axial dimension, from one pendulum mass to another pendulum mass of the same pendulum body.

[0051] From one pendulum mass to the other pendulum mass of the pendulum body, the same number of axial projections can be provided.

[0052] Still according to this first embodiment, the portion of one pendulum mass which protrudes axially in the direction of the other pendulum mass of the pendulum body can exert a clamping of the adjacent damping member and thus help to retain it on the spacer of the pendulum body. The retention of the adjacent damping member on the spacer can be caused only by the clamping exerted by the axially protruding portion or also by other reasons, such as a form-locking or adhesive bonding or any other fastening of the adjacent damping member on the spacer.

[0053] The or each portion of one pendulum mass that projects axially in the direction of the other pendulum mass of the pendulum body can exert an axial clamping against the other pendulum mass on an adjacent damping member. The adjacent damping member is, for example, clamped axially between the axially projecting portion of one mass of the pendulum body and the other pendulum mass, if necessary, against the axially projecting portion of the other pendulum mass of the pendulum body. As already mentioned, the free end of the axially projecting portion can be planar, and this planar end face then exerts the clamping, regardless of whether it extends in a plane perpendicular to the axis of rotation. In a variant, the free end of the axially projecting portion is not planar, and the axial clamping is exerted on the adjacent damping member, for example by this free end, in particular having a concave or convex shape.

[0054] In a variant, the or each portion of one pendulum mass that projects axially in the direction of the other pendulum mass of the pendulum body can exert a non-axial clamping of the adjacent damping member against the spacer. This clamping is then oriented only in a plane orthogonal to the axis of rotation of the support, with, for example, a radial component and an orthoradial component. Each portion of one pendulum mass that projects axially in the direction of the other pendulum mass then clamps the adjacent damping member against the spacer of the connecting member by a lateral face.

[0055] According to a second embodiment, in the case where the connection means are rivets, the abutment of the pendulum against the support is ensured at all or some of the abutment points of the pendulum against the support by the combination of these rivets with the abutment damping member. The hardness of the rivets can be lower than that of the support, so that when an impact occurs, they will be filled and then deformed to tend to the corresponding shape of the surface of the support against which they abut. A greater contact area is then obtained between the rivets and the support, thereby reducing the forces on these rivets.

[0056] In all or some of the abutment positions of the pendulum against the support, the rivets ensuring the abutment of the pendulum against the support in combination with the abutment damping element can be accommodated in openings provided in the spacer and have an open profile. In other words, each rivet is not completely surrounded by the material of the spacer when accommodated in one of these openings.

[0057] In all of the foregoing, each first raceway may be defined by the edge of the same common hole provided in the support, and each second raceway may be defined by the edge of the same spacer of the connecting member. In this case, according to the above-mentioned first embodiment, each circumferential end of the spacer may be associated with a portion of the pendulum mass that protrudes axially in the direction of the other pendulum mass. Each portion of the pendulum mass that protrudes axially in the direction of the other pendulum mass may extend circumferentially beyond the circumferential end of the spacer associated with it. Still in this case, according to the first embodiment, one or more other portions that protrude axially in the direction of the other pendulum mass of the pendulum body may be formed radially within the spacer.

[0058] Still in this case, but according to a second embodiment, a rivet can be housed at each circumferential end of the spacer and this rivet can be housed in an open profile opening of the spacer so that the surface of the rivet can be in direct contact with the support.

[0059] In this case as well, according to one or other of these two embodiments, a single abutting damping member may be associated with the spacer and this abutting damping member may extend continuously along the radially inner edge of the spacer.

[0060] In one embodiment, one of the first races may be defined by an edge of a hole in the support, another of the first races may be defined by an edge of another hole in the support, one of the second races may be defined by an edge of a first spacer of a connecting member received in one of the holes, another of the second races may be defined by an edge of a second spacer of a connecting member received in another of the holes, and the pendulum may include a first adjacent damping member associated with the first spacer and having elasticity, and a second adjacent damping member associated with the second spacer and having elasticity.

[0061] In this variant, and in accordance with the first embodiment, each spacer can be associated with two parts of one pendulum mass that protrude axially in the direction of the other pendulum mass, namely: a part that protrudes axially in the direction of the other pendulum mass and is associated with the circumferential end of the spacer that is closest to the circumferential end of the pendulum body, and a part that protrudes axially in the direction of the other pendulum mass and is arranged radially inward relative to the spacer.

[0062] Still in this variant, and according to one or other of the two embodiments, the pendulum can be provided with two adjacent damping members, each of which is respectively associated with the spacer and extends continuously, for example, along the radially inner edge of the spacer.

[0063] In all the foregoing, each rolling element may be subjected only to compressive stress between the first and second raceways.The first and second raceways cooperating with the same rolling element may at least partially radially face each other, ie there is a plane perpendicular to the axis of rotation in which the raceways extend.

[0064] In all the foregoing, the rolling member may have a lateral rolling surface that rolls alternately on the first raceway and the second raceway. The lateral surface may be processed by grinding, which is also referred to as "grinding". In a variant, or in addition, the rolling member has at least one axial surface facing the pendulum mass, which is processed in whole or in part by grinding. In the latter case, the surface of the axial surface of the pendulum mass facing the rolling member that has been processed in whole or in part by grinding may also be processed in whole or in part by grinding. The same grinding wheel can be used for these two axially facing surfaces.

[0065] In the variant just described, the second raceway is not defined by a spacer. According to this variant, each rolling element no longer cooperates with a single second raceway integral with the pendulum body, but with two second raceways integral with the pendulum body. One of these second raceways is defined by the first pendulum mass, while the other of these second raceways is defined by the second pendulum mass. Each connecting element is then, for example, a rivet, received in an opening of the support, which opening is different from the hole receiving the rolling element. Each rolling element can then comprise, axially in series:

[0066] a portion arranged in the cavity of the first pendulum mass and cooperating with a second raceway formed by a portion of the contour of this cavity,

[0067] a portion arranged in the hole of the support and cooperating with a first raceway formed by a portion of the profile of this hole, and

[0068] A portion which is arranged in the cavity of the second pendulum mass and which cooperates with a second raceway formed by a portion of the contour of this cavity.

[0069] In all of the foregoing, the abutment damping member may be in contact with the support to dampen abutment of the pendulum against it:

[0070] - at the end of the movement of the pendulum from a rest position in a triangular direction, and / or

[0071] - at the end of the movement of the pendulum from a rest position in a non-triangular direction, and / or

[0072] - In the case of a radial fall of the pendulum, for example when the internal combustion engine of a vehicle is stopped.

[0073] According to another aspect of the utility model, the utility model also relates to a pendulum damping device, comprising:

[0074] - a support rotatable about an axis,

[0075] at least one pendulum body movable relative to the support and comprising two pendulum masses positioned axially on each side of the support, the two pendulum masses being rigidly connected to each other by at least one connecting member, and

[0076] - two rolling elements that guide the movement of the pendulum relative to the support, each rolling element cooperating with a first raceway integral with the support and with a second raceway integral with the pendulum,

[0077] The pendulum body includes an adjacent damping member associated with the connecting member and having elasticity,

[0078] At least one of the pendulum masses of the pendulum comprises a portion protruding axially in the direction of the other pendulum mass of the pendulum, which portion exerts a clamping force on the adjacent damping element and thus helps to retain it on the connecting element.

[0079] Everything that has been described above still applies to this other aspect of the invention, in particular the fact that the holding of the adjoining damping element on the connecting element is obtained completely or partly by clamping.

[0080] Therefore, according to this other aspect of the utility model:

[0081] each pendulum mass of the pendulum body may comprise a portion protruding axially in the direction of the other pendulum mass of the pendulum body, these protruding portions overlapping circumferentially from one pendulum mass to the other,

[0082] the part protruding axially in the direction of the other pendulum mass of the pendulum body may include a free end, which may or may not be planar,

[0083] - the free end of the axial projection may extend in a plane perpendicular to the axis of rotation of the support,

[0084] - the free end of the axial projection may extend obliquely with respect to the axis of rotation of the support,

[0085] the or each portion of one pendulum mass which projects axially in the direction of the other pendulum mass of the pendulum body can exert an axial clamping of the adjacent damping element against the other pendulum mass,

[0086] the or each portion of one pendulum mass protruding axially in the direction of the other pendulum mass of the pendulum body can exert a non-axial clamping of the adjacent damping member against the connecting member, in particular via a lateral face of the portion protruding axially in the direction of the other pendulum mass,

[0087] The retention of the abutting damping member on the connecting member may only be caused by the clamping exerted by the axially protruding portion.

[0088] In all of the foregoing, the support may have at least one tab, and the tab may define a portion of the support radially furthest from an axis of rotation of the support.

[0089] The support member comprises, for example, two radially opposite protrusions. Each protrusion can cooperate with an elastic return member.

[0090] In all the foregoing, the pendulum damping device may comprise a plurality of pendulum bodies angularly following each other around the axis of rotation of the support. Thus, the device may comprise a plurality of planes perpendicular to the axis of rotation, all of the pendulum bodies being arranged in each plane.

[0091] More precisely, the pendulum damping device may comprise only two or three or four pendulum bodies which follow one another angularly around the axis of rotation of the support.

[0092] In all the foregoing, each rolling member is, for example, a roller. Each rolling member is, for example, a roller made of steel. The roller may be hollow or solid. The roller may have only one diameter along its entire longitudinal axis.

[0093] In all of the foregoing, the support may be made in one piece, for example completely from metal.

[0094] In all the foregoing, in the pendulum damping device, all first races integral with the support member may have shapes that are completely identical to each other, and / or all second races integral with the pendulum body may have shapes that are completely identical to each other.

[0095] In all the foregoing, the first and second raceways may have shapes chosen so that the pendulum can translate relative to the support about an imaginary axis parallel to the axis of rotation of the support and can rotate about itself, in particular about its centre of gravity.

[0096] According to another aspect of the utility model, the utility model also relates to a component for a motor vehicle transmission system, which component is in particular a dual-mass flywheel, a torque converter, a flywheel fixed to a crankshaft, a wet or dry dual clutch, a single wet clutch, a hybrid powertrain component or a friction plate, including a pendulum damping device as described above.

[0097] The component is, for example, a dual mass flywheel and comprises:

[0098] - the above-mentioned pendulum damping device, with the above-mentioned lug, and

[0099] - A plurality of elastic return members, the tab interacting with two elastic return members.

[0100] As mentioned above, two diametrically opposed tabs may be provided.

[0101] Each elastic return member can be formed by a single spring or multiple springs, such as two concentric springs with different stiffness. Each spring can be a straight spring or a curved spring.

[0102] Such a dual mass flywheel may have:

[0103] - a primary flywheel adapted to be rigidly fastened to the crankshaft of the internal combustion engine, if applicable via a flexible plate, and

[0104] - A secondary flywheel, which is suitable for being fastened at the input of the clutch or double clutch. The support of the pendulum damping device thus forms part of the secondary flywheel.

[0105] The primary flywheel is adapted to be rigidly connected to the crankshaft, which means that it can be permanently rigidly connected to the crankshaft. Thus, this rigid connection of the primary component to the crankshaft is different from a selective connection, for example, by a clutch.

[0106] The secondary flywheel may also include a hub. The hub may include splines so that it can be fitted onto a gearbox input shaft or onto an input shaft of a wet or dry dual clutch.

[0107] According to another aspect of the present invention, the present invention also relates to a transmission system, in particular a transmission system for a hybrid vehicle, comprising:

[0108] - the above components, and

[0109] - A wet or dry double clutch receiving the output torque from the component.

[0110] The transmission system may also include:

[0111] - a gearbox, including a pinion, defining a gearbox transmission ratio, and

[0112] -Front and rear axles.

[0113] According to another aspect of the present invention, the present invention also relates to a hybrid vehicle power system, comprising:

[0114] - the transmission system as above, and

[0115] - a rotary electric propulsion machine, the shaft of the rotary electric machine being rigidly connected in common rotation to:

[0116] - the input shaft of the gearbox, or

[0117] - the output shaft of the gearbox, or

[0118] - the idler pinion of a gearbox, or

[0119] - the front or rear axle, or

[0120] - crankshafts of internal combustion engines of vehicles,

[0121] The rotating electrical machine has a rated supply voltage of 48 V, for example, or a rated supply voltage of more than 200 V, in particular more than 300 V. BRIEF DESCRIPTION OF THE DRAWINGS

[0122] The present invention will be better understood by reading the following description of non-limiting examples and examining the accompanying drawings, in which:

[0123] Figure 1 A dual-mass flywheel with a pendulum damping device to which the utility model can be applied is shown;

[0124] Figure 2 Partially shows a pendulum damping device according to a first embodiment of the utility model,

[0125] Figure 3 yes Figure 2 Side view of the pendulum damping device,

[0126] Figure 4 Shows Figure 2 A variation of the pendulum damping device, Figure 5 Shows Figure 2 Another variation of the pendulum damping device,

[0127] Figure 6 , Figure 7 and Figure 8 are views showing different embodiments of axial clamping of adjacent damping members,

[0128] Fig. 9 Partially shows a pendulum damping device according to a second embodiment of the utility model, and

[0129] Fig.10 Another pendulum damping device to which the utility model is applicable is partially shown. DETAILED DESCRIPTION

[0130] Figure 1 A component 1 of a transmission system incorporating a pendulum damping device 20 is shown. In this case, the component 1 is a dual mass flywheel, which is intended, for example, to be associated with a wet dual clutch and / or integrated into a hybrid vehicle powertrain. However, the invention is not limited to this application and, in a variant, can be integrated, for example, into a clutch disc or a torque converter.

[0131] like Figure 1 As shown, component 1 includes:

[0132] - Primary flywheel, and

[0133] -Secondary flywheel.

[0134] Primary flywheels may include:

[0135] -hub,

[0136] -Flexible board,

[0137] - starter ring gear 6,

[0138] -Metal washers (not shown).

[0139] The primary flywheel can be fastened to the crankshaft of the internal combustion engine by rivets. The internal combustion engine is, for example, a three-cylinder or four-cylinder engine.

[0140] according to Figure 1 In the example of a secondary flywheel, the secondary flywheel includes:

[0141] - a hub 12 having splines allowing it to be mounted on a shaft,

[0142] a flange 13 , also called “web”, fastened to the hub 12 by rivets (not shown) housed in holes 16 formed in the web 13 ,

[0143] - pendulum bodies, each comprising two pendulum masses 14, positioned axially on either side of a web 13, the web 13 serving as a support for the pendulum body.

[0144] The secondary flywheel 3 here therefore incorporates a pendulum damping device 20 , the web 13 of which forms the support element.

[0145] The component 1 also comprises an elastic return member 18 which limits the rotation of the secondary flywheel relative to the primary flywheel about the rotation axis X. Two springs 18 are provided here and are bending springs.

[0146] like Figure 1 As shown, in this example, the support 13 comprises two lugs 19 each defining a radial extension and each of these lugs 19 coming into contact with the spring 18 when the secondary flywheel moves in rotation relative to the primary flywheel about the axis X. In this case, the two lugs 19 are diametrically opposite one another.

[0147] In the example described, the primary flywheel defines the limits of the radially outward movement of the spring 18 .

[0148] exist Figure 1 In the embodiment shown in FIG. 2 , the pendulum damping device 20 is at rest, ie it does not filter the torsional oscillations caused by the non-cyclic behavior of the internal combustion engine.

[0149] exist Figure 1 In the example of FIG. 2 , two pendulums are provided, evenly distributed around the periphery of the axis X. However, the number of pendulums is not limiting.

[0150] More precisely, when moving around the axis of rotation X of the support 13, the following is encountered:

[0151] - The first pendulum,

[0152] - From an angular perspective, the first protrusion 19 arranged following the first pendulum,

[0153] - angularly, a second pendulum arranged behind the first lug 19, and

[0154] - Angularly, a second tab 19 is arranged behind the second pendulum.

[0155] In this case, the two tabs 19 and the two pendulums are arranged so that no pendulum overlaps circumferentially with a tab in either of its two adjacent positions.

[0156] like Figure 1 As shown, each pendulum in this example includes:

[0157] - two pendulum masses 14, each of which extends axially on a side facing the support 13, and

[0158] A connecting member 30 rigidly connecting the two pendulum masses 14 of the pendulum.

[0159] exist Figure 2 In the example of FIG. 1 , the pendulum mass 14 is not shown, and each connecting member 30 comprises a single spacer 31 connected by a rivet 34 (in Figure 2 The rivets 34 are received in holes 32 formed in the spacer 31 to rigidly connect the two pendulum masses 14 to one another. These holes 32 here have an open profile, that is, the rivets 34 received in such holes 32 are not completely surrounded by the material of the spacer 31.

[0160] Each spacer 31 extends partially in a hole 33 provided in the support 13. In the example considered, the hole 33 defines an empty space inside the support 13, the hole being delimited by a closed contour 35.

[0161] In the example considered, the device 20 also comprises rolling members 40 which guide the movement of the pendulum relative to the support 13. In this case, the rolling members 40 are rollers, as shown below. Figure 2 In the example of FIG. 5 , each roller maintains a substantially constant diameter throughout its length.

[0162] from Figure 2As can be seen in Figure 2 , the device 20 also comprises an abutment damping member 50 capable of being in contact simultaneously with the spacer 31 and the support 13 in certain relative positions of the support 13 and the pendulum mass 14, for example at the end of a movement from a rest position, in order to filter torsional oscillations, or when the pendulum falls radially. Each abutment damping member 50 is, for example, fixed to the pendulum, mounted on each pendulum and arranged radially between the spacer 31 of that pendulum and the profile 35 of the hole 33. In this case, each abutment damping member 50 is in the form of an elastomer or rubber strip extending continuously along the radial inner edge of the spacer 31.

[0163] In the example described, the movement of each pendulum relative to the support 13 is guided by two rolling members 40 .

[0164] from Figure 2 It can be seen that each rolling member 40 cooperates by rolling with a single first raceway 42 integral with the support 13 and with a single second raceway 43 integral with the pendulum so as to guide the translational movement of the pendulum around an imaginary axis parallel to the rotation axis X of the support 2, and if necessary, guide the rotational movement, in particular the rotational movement around the center of gravity of the pendulum.

[0165] In the example considered, each second race 43 is formed by a portion of the radially outer edge of the spacer 31 , the spacer 31 thus defining the second race 43 of the pendulum via two different portions of its radially outer edge.

[0166] In the example considered, each first race 42 is defined by a portion of the profile 35 of the hole 33 in which the spacer 31 is housed. In the example considered, two different portions of the radially outer edge of the profile 35 thus define the first races 42 associated with the pendulum.

[0167] In this case, each first race 42 is positioned radially facing a second race 43 so that the same lateral rolling surface of the rolling member 40 rolls alternately on the first race 42 and the second race 43. The lateral rolling surface of the rolling member is in this case a cylinder of constant radius.

[0168] from Figure 1 As can be seen in the drawing, a part, also called a "pad", can be provided for axial insertion between the pendulum body and the support 13. This pad is carried, for example, in a fixed manner by each pendulum mass 14 on their face facing the support 13. This pad is fixed, for example, by means of a pin 55 housed in an opening formed in the pendulum mass 14.

[0169] According to the invention, the abutment between the support 13 and each pendulum is not only occupied by the abutment damping member 50 of this pendulum.

[0170] exist Figures 2 to 7 In the example of , this abutment is also ensured by one or more sections 60 which protrude axially from one pendulum mass in the direction of the other pendulum mass 14 of the same pendulum body.

[0171] Each portion 60 is, for example, made in one piece with the rest of the pendulum mass 14 and projects axially from the pendulum mass 14. Each portion 60 is, for example, made by extrusion.

[0172] exist Figure 2 and 3 In the example of , three sections 60 are provided for each pendulum mass 14 of the pendulum body, and the two pendulum masses 14 of the pendulum body have the same number of circumferentially overlapping sections 60. Figure 2 In the example of , the portion 60 is arranged at the circumferential end 36 of the spacer 31, and the portion 60 of the pendulum mass protruding axially in the direction of the other pendulum mass 14 in this case extends circumferentially beyond this circumferential end 36 of the spacer 31. A further portion 60 is arranged at the other circumferential end 36 of the spacer 31, and the further portion 60 of the pendulum mass protruding axially in the direction of the other pendulum mass 14 in this case extends circumferentially beyond this other circumferential end 36 of the spacer 31. Finally, the last portion 60 protruding axially in the direction of the other pendulum mass is in this case arranged radially within the spacer 31, below its radial inner edge.

[0173] from Figure 3 As can be seen in , in which the spacer 31 and the rivet 34 are not shown, for two pendulum masses 14 of the same pendulum body, two parts 60 protruding axially and belonging to each pendulum mass 14 of the same pendulum body can extend axially in all or part of the axial space occupied by the spacer 31, but circumferentially offset relative to the spacer 31. The two parts 60 can extend over the same axial dimension and have a free end 61 formed by a plane. Figure 3 In the example of , each of these planes 61 extends perpendicularly to the axis of rotation X of the support 13 .

[0174] from Figure 2 It can also be seen in FIG. 1 that each protruding portion 60 of the pendulum mass 14 is at a distance from the spacer 31 and does not contact the spacer 31 .

[0175] In a variant (not shown), all or part of the portion 60 protruding axially from the pendulum mass 14 is in contact with the spacer 31 .

[0176] The axially protruding portions 60 may also serve to help retain the adjacent damping member 50 on the spacer 31. Such retention may be ensured by these portions 60 alone or in combination with other retaining means.

[0177] exist Figure 2 and Figure 3 In the example of , the axial protrusion 60 exerts a clamping of the adjacent damping element 50 against the spacer 31 by forces situated in a plane perpendicular to the axis of rotation X of the support 13 , these forces are therefore non-axial.

[0178] Therefore, from Figure 2 It can be seen that:

[0179] a portion 60 protruding axially from the pendulum mass 14 and arranged outside the circumferential end 36 of the spacer 31 exerts a force which locally clamps the adjacent damping member 50 against the spacer 31 , and

[0180] A portion 60 protruding axially from the pendulum mass 14 and arranged radially inwardly relative to the spacer 31 exerts a radially outwardly directed force in order to locally clamp the adjoining damping element 50 against the spacer 31 .

[0181] Figure 4 and Figure 3 The difference is that the clamping of the axial protrusion 60 to the adjacent damping member 50 is achieved by axial force. Figure 4 In the embodiment, the hole 32 in the spacer 31 for receiving the rivet 34 has a closed profile, but the profile can be open, similar to Figure 2 shown.

[0182] like Figures 6 to 8 As shown, the adjacent damping member 50 is, for example, partially arranged axially between two axial ends 61, respectively belonging to the axially protruding portion 60. The adjacent damping member 50 is then axially clamped between the two axial ends 61. Figure 6 As shown, these axial ends 61 can each define a plane perpendicular to the rotation axis X of the support 13. In a variant, the two axial ends 61 can each define a plane that is not perpendicular to the rotation axis X of the support X but extends obliquely relative to this axis. Figure 7 As shown, the two axial ends 61 that partially axially clamp the adjacent damping members 50 therebetween may not be parallel to each other.

[0183] In another variant, these axial ends 61 are not planar, for example having a shape similar to Figure 8 The concave shape shown, Figure 8 The portion 60 is not shown, but the concavity of the surface of the pendulum mass 14 applies to the axial end 61 of the axially protruding portion 60. In another variant, the axial end 61 may have a convex shape or any other shape, for example an irregular shape.

[0184] Figure 5A variant is also shown in which certain portions 60 protruding axially from the pendulum mass 14 apply axial clamping to adjacent damping members 50, such as those arranged outside the circumferential end 36 of the spacer 31, while one or more other portions 60 protruding axially from the pendulum mass 14 apply non-axial clamping to adjacent damping members 50, in this example, portions 60 are arranged radially within the spacer 31, which apply radial clamping.

[0185] Fig. 9 Corresponding to the pendulum damping device 20 according to the second embodiment of the utility model, according to the second embodiment, the abutment of the pendulum against the support 13 is ensured by the rivet 34 in combination with the abutment damping member 50 at all or some abutment positions of the pendulum against the support, as described below.

[0186] The combination of the rivets 34 and the abutment damping member 50 which ensure the abutment of the pendulum against the support is received here in an opening 32 formed in the spacer 31 and having an open profile, which allows the rivets 34 to be in direct contact with the profile 35 of the hole 33 formed in the support 13 in the abutment position. Here, each rivet 34 is arranged at a circumferential end 36 of the spacer 31.

[0187] The present invention is not limited to the description provided above. For example, Fig.10 As shown, the present invention is also applicable to the case where the connecting member 30 includes two separate spacers.

Claims

1. A pendulum damping device (20), characterized in that: The pendulum damping device (20) comprises: - a support (13) rotatable about an axis (X), - at least one pendulum body, movable relative to the support (13) and comprising two pendulum masses (14) respectively positioned axially on one side of the support (13), the two pendulum masses being rigidly connected to each other by at least one connecting member (30), and - two rolling elements (40) which guide the movement of the pendulum relative to the support (13), each rolling element (40) cooperating with a first raceway (42) integral with the support (13) and with a second raceway (43) integral with the pendulum, The pendulum body includes an adjacent damping member (50) associated with the connecting member (30) and having elasticity, At least one of the pendulum masses (14) of the pendulum comprises a portion (60) protruding axially in the direction of the other pendulum mass (14) of the pendulum, which portion (60) applies a clamping abutment against the damping element (50) and thus helps to hold it on the connecting element (30).

2. The device according to claim 1, characterized in that Each pendulum mass (14) of the pendulum body comprises a portion (60) protruding axially in the direction of the other pendulum mass (14) of the pendulum body, and these axially protruding portions (60) overlap circumferentially from one pendulum mass (14) to the other pendulum mass (14).

3. The device according to claim 1 or 2, characterized in that The portion (60) protruding axially in the direction of the other pendulum mass (14) of the pendulum body comprises a free end (61) which may be planar or non-planar.

4. The device according to claim 3, characterized in that The free end (61) of the axially protruding portion (60) extends in a plane perpendicular to the axis of rotation (X) of the support (13).

5. The device according to claim 3, characterized in that The free end (61) of the axially protruding portion (60) extends obliquely relative to the rotation axis (X) of the support (13).

6. The device according to any one of claims 2 and 3 to 5, characterized in that The or each portion (60) of one pendulum mass (14) which projects axially in the direction of the other pendulum mass (14) of the pendulum body applies an axial clamping to the adjacent damping member (50) against the other pendulum mass (14).

7. The device according to claim 2, characterized in that The or each portion (60) of one pendulum mass (14) protruding axially in the direction of the other pendulum mass (14) of the pendulum body applies a non-axial clamping to the adjacent damping member (50) against the connecting member (30), in particular via a lateral surface of the portion (60) protruding axially in the direction of the other pendulum mass (14).

8. A device as claimed in any one of the preceding claims, characterised in that The retention of the abutment damping member (50) on the connection member (30) is caused only by the clamping force exerted by the axially protruding portion (60).

9. A device as claimed in any one of the preceding claims, characterised in that The second raceway (43) is defined by the connecting member (30), which comprises a spacer (31) positioned axially between the two pendulum masses (14) and rigidly fastened to the two pendulum masses (14) by means of a connecting device (34).

10. The device according to claim 9, characterized in that Each first raceway (42) is defined by the edge of a common hole (33) provided in the support (13), and each second raceway (43) is defined by the edge of a common spacer (31) of the connection member.

11. The device according to claim 9, characterized in that One of the first raceways (42) is defined by an edge of a hole (33) provided in the support member (13), another of the first raceways (42) is defined by an edge of another hole (33) provided in the support member (13), one of the second raceways is defined by an edge of a first spacer (31) of the connecting member, and another of the second raceways is defined by an edge of a second spacer (31) of the connecting member, and the pendulum includes a first adjacent damping member (50) associated with the first spacer (31) and having elasticity, and a second adjacent damping member (50) associated with the second spacer (31) and having elasticity.

12. A device as claimed in any one of the preceding claims, characterised in that The support (13) comprises at least one lug (19), in particular two diametrically opposed lugs (19), which are suitable for cooperating with the elastic return member for filtering torsional oscillations.

13. A component (1) for a drive train of a motor vehicle, in particular a dual-mass flywheel, a torque converter, a flywheel fixed to the crankshaft, a wet or dry double clutch, a single wet clutch, a hybrid powertrain component or a friction disc, characterized in that The component (1) comprises a pendulum damping device (20) as claimed in any one of the preceding claims.

14. The component according to claim 13, which is a dual mass flywheel, characterized in that The components include: - A pendulum damping device (20) as claimed in claim 12, and - A plurality of elastic return members, the tab (19) interacting with two of the elastic return members.

15. A transmission system, particularly for a hybrid vehicle, characterized in that: The transmission system comprises: - a component (1) as claimed in the preceding claim, and - A wet or dry double clutch receiving the output torque from the component.

Images