Swing damping device

Abstract

A swing damping device (20) comprising:-a support (13) comprising a first drive arm (19) and a second drive arm (190) which are diametrically opposite; -two pendulum bodies, which can be moved relative to the support (13); -two first rolling members (40) which guide the movement of the first pendulum body and which interact with two first raceways (42) formed in the support (13); and-two second rolling members (400) which guide the movement of the second pendulum body and which interact with two third raceways (420) formed in the support (13); the supporting piece (13) is suitable for receiving two pendulum bodies strictly; and two first raceways (42) positioned orthogonally on both sides of the first drive arm (19) and two third raceways (420) positioned orthogonally on both sides of the second drive arm (190).

Description

Technical Field

[0001] This invention relates to a swing damping device, particularly a swing damping device for a motor vehicle transmission system. Background Technology

[0002] In such applications, the oscillating damping device can be integrated into a torsional damping system that selectively connects the internal combustion engine to the clutch of the transmission to filter vibrations caused by the engine's non-cyclic behavior. Such a torsional damping system is, for example, a dual-mass flywheel. This dual-mass flywheel can be integrated, for example, into a friction clutch disc or into a transmission system comprising a wet or dry dual clutch. In the latter case, the transmission system may or may not be integrated into a hybrid vehicle.

[0003] For example, a swing damping device is known from document CN210371835U, which includes:

[0004] - A support member, the support member being rotatable about an axis and including a drive arm that interacts with an elastically restoring member;

[0005] - At least one pendulum body, said at least one pendulum body being movable relative to said support and comprising two pendulum masses respectively axially arranged on one side of said support, said two pendulum masses being fixed to each other by a connecting member; and

[0006] - Two rolling members that guide the movement of the pendulum relative to the support, each rolling member interacting with a first raceway integral with the support and a second raceway integral with the pendulum.

[0007] In the prior art, a known oscillating damping device includes a support member and four pendulum bodies distributed along the circumference. Document CN210371835U proposes that only two pendulum bodies are required to reduce the cost of the oscillating damping device when lower damping requirements exist. However, the geometry of the support member in CN210371835U remains similar to the geometry of the support member in an oscillating damping device with four pendulum bodies. Therefore, the geometry of this support member has not been improved to reduce its cost and weight. Summary of the Invention

[0008] In the following text, ordinal number adjectives are used to distinguish features. They do not specify the position of the feature. Therefore, for example, the third feature of a product does not mean that the product has the first and / or second features.

[0009] There is a need for a swing damping device having two pendulums associated with a support having an improved geometry so that its cost and mass can be reduced.

[0010] The purpose of this invention is to meet this need, and this invention uses a swing damping device to meet this need, the swing damping device comprising:

[0011] - A support member, the support member being rotatable about a first axis and including a first drive arm and a second drive arm, the first drive arm and the second drive arm extending radially and being diametrically opposed;

[0012] - There are exactly two pendulum bodies, namely a first pendulum body and a second pendulum body, each pendulum body being movable relative to the support and comprising two pendulum masses respectively axially arranged on both sides of the support and at least one connecting member, the two pendulum masses being fixed to each other by the at least one connecting member;

[0013] - Two first rolling members that guide the movement of the first pendulum body relative to the support, the two first rolling members interacting with two first raceways formed in the support and with two second raceways formed in the first pendulum body; and

[0014] - Two second rolling members that guide the movement of the second pendulum body relative to the support member, the two second rolling members interacting with two third raceways formed in the support member and with two fourth raceways formed in the second pendulum body;

[0015] The support is adapted to receive two pendulums; and

[0016] The two first raceways are positioned completely or partially orthogonally on either side of the first drive arm, and the two third raceways are positioned completely or partially orthogonally on either side of the second drive arm.

[0017] Having two pendulums allows for a reduction in the cost of the oscillation damping device, especially when there are low oscillation damping requirements.

[0018] The structure of the swing damping device according to the invention allows for the obtaining of a geometry in which the raceway and the two drive arms are substantially aligned with the support. This feature allows the support to be made of a strip of material with a narrow width, thereby limiting its cost and mass.

[0019] Furthermore, since the support is designed to receive exactly two pendulums, there are no additional raceways intended to receive any additional pendulums. The number of raceways in the support is strictly limited to four: two first raceways and two third raceways. Therefore, the amount of material used to manufacture the geometry of the support can be further reduced to specifically meet the stringent requirement of having raceways needed for only two pendulums.

[0020] Within the meaning of this invention:

[0021] - "Axial axis" means "parallel to the first axis of rotation";

[0022] - "Radial" means "along an axis belonging to and intersecting a plane that is orthogonal to and intersects the first axis of rotation";

[0023] - "Orthogonal" means "perpendicular to the radial direction";

[0024] - "Circumferential" means "around the first axis of rotation".

[0025] According to an additional feature of the invention, the support is manufactured by a process of cutting a steel plate of constant thickness.

[0026] According to an additional feature of the invention, the support is made as a single piece.

[0027] Specifically, the structure of the oscillating damping device according to the invention allows the geometry of the support to be obtained from a strip of material with a narrow width, without having to manufacture the support in multiple parts for this purpose. By avoiding the assembly and handling of sub-assemblies during the manufacturing process, the support is easier to manufacture as a single piece.

[0028] Additional features according to the invention:

[0029] - A second axis and a third axis are defined, the second axis extending radially through the first drive arm and the second drive arm, and the third axis being perpendicular to the second axis and the first axis;

[0030] - The two first raceways are formed together in the same common first hole or individually in two separate first holes in the support, the common first hole or the two separate first holes considered together having a first width along the third axis, measured at a first position along the second axis;

[0031] - The two third raceways are formed together in the same common second hole or individually in two separate second holes in the support, the common second hole or the two separate second holes considered together having a second width along the third axis, measured at a second position along the second axis; and

[0032] - The support member includes an outer contour having a third width measured at the first position along the third axis and a fourth width measured at the second position along the third axis;

[0033] The ratio of the third width to the first width is between 1.05 and 1.5, and the ratio of the fourth width to the second width is between 1.05 and 1.5.

[0034] With the help of this final feature, the defined width ratio allows for the determination of a compromise that is suitable for limiting the amount of material used while ensuring sufficient mechanical strength of the support to withstand the various mechanical stresses applied to the swing damping device.

[0035] Regarding the holes in the support, the term "width" should be interpreted as the maximum distance measured between two straight lines parallel to the second axis and tangent to the profiles of two separate holes that are the same common hole or considered together.

[0036] Regarding the outer contour of the support, the term "width" should be interpreted as the minimum distance measured between two straight lines parallel to the second axis and tangent to the outer contour of the support.

[0037] According to an additional feature of the invention, the support includes an outer contour designed to ensure that the support faces axially toward the two pendulum masses of the two pendulum bodies as a whole, regardless of the position of the two pendulum bodies.

[0038] With the help of this last feature, the defined outer contour of the support allows for the determination of a compromise that is suitable for limiting the amount of material used while ensuring satisfactory axial guidance of the pendulum throughout its oscillating motion relative to the support.

[0039] According to an additional feature of the invention, the support includes two straight and parallel outer edges, which are positioned symmetrically with respect to a second axis.

[0040] Therefore, the material strips used to manufacture the support have a simple geometry, which makes the cutting process and associated tools equally easy to manufacture and reduces their cost.

[0041] According to an additional feature of the invention, in addition to the first and second drive arms, the geometry of the support member also has a substantially circular rectangular shape.

[0042] According to an additional feature of the invention, the geometry of the support is substantially symmetrical with respect to the second axis and with respect to the third axis.

[0043] According to an additional feature of the invention, the first pendulum and the second pendulum together have a first moment of inertia, and the support has a second moment of inertia, the ratio of the first moment of inertia to the second moment of inertia being between 1 and 3.5.

[0044] Specifically, the structure of the oscillating damping device according to the invention results in a reduction in the moment of inertia of the support member, thus advantageously enabling a larger ratio of the first moment of inertia to the second moment of inertia, which is beneficial to the damping performance.

[0045] According to an additional feature of the invention, the first drive arm and the second drive arm extend radially, particularly radially outward, so as to interact with each of the two elastically restoring members.

[0046] According to an additional feature of the invention, each elastic restoring member may be formed by a single spring or by multiple springs, for example by two concentric springs with different stiffnesses, the springs being straight springs or curved springs, and the springs working together in series or in parallel.

[0047] According to one aspect of the invention, the first drive arm and the second drive arm define the portion of the support member furthest from the first axis of rotation.

[0048] According to another aspect of the invention, the first drive arm and the second drive arm define the portion of the support closest to the first axis of rotation.

[0049] According to another aspect of the invention, the first drive arm and the second drive arm extend radially, particularly radially inward, so as to interact with the device for fastening the support.

[0050] According to an additional feature of the invention, the first drive arm and the second drive arm each extend circumferentially in an angular sector between 5° and 25°.

[0051] According to the first embodiment of the present invention:

[0052] - The two first raceways are formed together in the same common first hole in the support;

[0053] - The two third raceways are formed together in the same common second hole in the support;

[0054] - The two second raceways are defined by the edge of a single spacer of the same connecting member of the first pendulum body;

[0055] - The two fourth raceways are defined by the edges of a single spacer of the same connecting member of the second pendulum; and

[0056] - For each pendulum body, the connecting components include a single spacer and a connecting device that connects the two pendulum masses and the single spacer, said connecting device being in particular a riveted or threaded connection or a welded or press-fit connection.

[0057] The single-spacer structure according to the first embodiment has the advantage of increasing the mass of the pendulum within a confined space. This increases the damping efficiency of each pendulum, thereby enabling the pendulum damping device to achieve sufficient damping efficiency, although limited to having two pendulums.

[0058] According to a second embodiment of the present invention:

[0059] - The two first raceways are individually formed in the support member in two separate first holes;

[0060] - The two third raceways are individually formed in the support member in two separate second holes;

[0061] - One of the second raceways is defined by the edge of the first spacer of the first connecting member of the first pendulum, and the other of the second raceways is defined by the edge of the second spacer of the second connecting member of the first pendulum;

[0062] - One of the fourth raceways is defined by the edge of the first spacer of the first connecting member of the second pendulum, and the other of the fourth raceway is defined by the edge of the second spacer of the second connecting member of the second pendulum;

[0063] - For each pendulum body, the connecting components include a first spacer, a second spacer, and a connecting device that connects the first spacer, the second spacer, and the two pendulum masses, which is in particular a riveted or threaded connection, a welded or press-fit connection.

[0064] According to the third embodiment of the present invention:

[0065] - The two first raceways are individually formed in the support member in two separate first holes;

[0066] - The two third raceways are individually formed in the support member in two separate second holes;

[0067] - The two second raceways are defined by the shapes formed in the two pendulum masses of the first pendulum body;

[0068] - The two fourth raceways are defined by the shapes formed in the two pendulum masses of the second pendulum body;

[0069] - For each pendulum, a connecting member connects the two pendulum masses together. The connecting member is in particular a riveted or threaded connection, or a welded or press-fit connection device.

[0070] According to an additional feature of the invention, the shapes of the two first raceways, the two second raceways, the two third raceways, and the two fourth raceways are chosen such that each pendulum moves relative to the support by both translating about an imaginary axis parallel to a first axis of rotation of the support and rotating about itself, particularly about its center of gravity.

[0071] The rotational motion of the pendulum introduced by this final feature has the effect of improving the damping performance of the pendulum damping device. Therefore, this feature can be used to reduce the oscillation amplitude of the pendulum, and thus advantageously reduce the width of the hole in the support, and thus ultimately reduce the width of the outer contour of the support according to the invention.

[0072] In all the above, each rolling element is, for example, a roller. Each rolling element is, for example, a roller made of steel. The roller can be hollow or solid. The roller can have only one diameter along its entire longitudinal axis.

[0073] In all of the above, each pendulum may support one or more abutment damping members that may contact the support to suppress abutment between the pendulum and the support, for example, after movement of the pendulum in a triangular and / or non-triangular direction and / or in the event of radial descent of the pendulum (e.g., when the internal combustion engine of the vehicle stops).

[0074] Each abutment damping member can have elastic properties, enabling the suppression of impacts associated with the contact between the support and the pendulum. This damping is thus made possible by compression of the abutment damping member. The abutment damping members are, for example, made of elastomers or rubber.

[0075] According to the first embodiment, each pendulum may include a single abutment damping member, which in all the above cases is used to suppress the pendulum from abutting against the support, and the single damping member may extend continuously along all or part of the radial inner surface of the spacer of the pendulum's connecting member.

[0076] In all of the above, in the swing damping device, all the first raceways integral with the support can have exactly the same shape as each other, and / or all the second raceways integral with the pendulum can have exactly the same shape as each other.

[0077] The present invention also relates to a component for a transmission system of a motor vehicle, the component being a torsional damper, and comprising:

[0078] - Primary component, the primary component including a torque input element;

[0079] - Secondary components, said secondary components including the oscillation damping device and torque output element as described above; and

[0080] - Elastic return components, particularly multiple springs, elastically rotate to connect the primary and secondary components.

[0081] The present invention also relates to a component for a transmission system of a motor vehicle, the component being a dual-mass flywheel, and comprising:

[0082] - Primary mass, which includes a torque input element in the form of a primary flywheel intended to be rotatably driven by a drive shaft;

[0083] - A secondary mass, comprising the oscillating damping device as described above and a torque output element in the form of a secondary flywheel or hub, the secondary flywheel or hub being capable of interacting directly or via a clutch with the driven shaft; and

[0084] - Elastic restoring components, particularly multiple springs, elastically rotate to connect the primary and secondary masses.

[0085] The drive shaft can be, for example, the crankshaft of an internal combustion engine.

[0086] The driven shaft can be, for example, the input shaft of a gearbox or the input shaft of a wet or dry dual clutch.

[0087] According to one aspect of the invention, the component is a dual-mass flywheel, the dual-mass flywheel including a chamber containing grease and the elastic recovery member housed in the chamber, the oscillation damping device being positioned inside the chamber, and the oscillating body being particularly radially positioned below the elastic recovery member.

[0088] According to another aspect of the invention, the component is a dual-mass flywheel, the dual-mass flywheel including a chamber containing grease and the elastic recovery member housed in the chamber, the oscillating damping device being positioned outside the chamber, and the oscillating body being specifically positioned axially facing the elastic recovery member.

[0089] The present invention also relates to a transmission system, particularly a transmission system for hybrid vehicles, comprising the aforementioned components and a wet or dry clutch or dual clutch that receives output torque from the components.

[0090] The transmission system may also include:

[0091] - A gearbox, the gearbox including a pinion defining a gearbox ratio; and

[0092] - Front axle and / or rear axle.

[0093] According to another aspect of the present invention, the present invention also relates to a hybrid vehicle powertrain, comprising:

[0094] - The aforementioned transmission system; and

[0095] - A rotary electric propulsion machine, wherein the shaft of the rotary electric machine is fixed to rotate together with the following:

[0096] - The input shaft of the gearbox; or

[0097] - The output shaft of the gearbox; or

[0098] - The idler pinion of the gearbox; or

[0099] - The front axle or the rear axle; or

[0100] - The crankshaft of a vehicle's internal combustion engine.

[0101] Rotary motors, for example, have a rated supply voltage of 48V, or a rated supply voltage greater than 200V, especially greater than 300V. Attached Figure Description

[0102] Figure 1 An equidistant schematic diagram of a dual-mass flywheel with a oscillating damping device according to the present invention is shown.

[0103] Figure 2 This is a schematic front view of the swing damping device according to a first embodiment of the present invention.

[0104] Figure 3 This is a schematic front view of the swing damping device according to a first embodiment of the present invention, which is... Figure 2 The difference is that, for clarity, the pendulum mass is not shown.

[0105] Figure 4 It is according to the first embodiment of the present invention and Figure 3 A schematic diagram of the same oscillating damping device, wherein additional reference numerals are indicated separately for clarity.

[0106] Figure 5 This is a schematic front view of a pendulum damping device according to a second embodiment of the present invention, wherein the pendulum mass is not shown for clarity.

[0107] Figure 6 It is according to the second embodiment of the present invention and Figure 5 A schematic diagram of the same oscillating damping device, wherein additional reference numerals are indicated separately for clarity.

[0108] Figure 7 This is a schematic front view of a pendulum damping device according to a third embodiment of the present invention, wherein the pendulum mass is not shown for clarity.

[0109] Figure 8This is a schematic partial front view of a swing damping device according to a first embodiment of the present invention, wherein the pendulum body is in an adjacent position. Detailed Implementation

[0110] In all the accompanying drawings, elements that are the same or perform the same function have the same reference numerals. The following embodiments are examples. Although the description relates to one or more embodiments, this does not necessarily mean that every reference relates to the same embodiment, or that a feature is applicable only to one embodiment. Various features of the various embodiments can also be combined or interchanged to produce other embodiments.

[0111] Figure 1 A component 1 for a transmission system incorporating a oscillating damping device 20 is shown. In this case, component 1 is a dual-mass flywheel, which is intended to be associated with, for example, a wet dual-clutch and / or integrated into the powertrain of a hybrid vehicle.

[0112] like Figure 1 As shown, component 1 includes a primary mass and a secondary mass. The primary mass may include a torque input element in the form of a primary flywheel 2, which may be threaded to the crankshaft of an internal combustion engine. The internal combustion engine is, for example, a three-cylinder or four-cylinder engine.

[0113] according to Figure 1 In the example, the secondary mass includes a hub 12, a flange 13, and two pendulum bodies. The hub 12 has splines that allow it to be mounted on a shaft. The flange 13, also referred to as a web, is fastened to the hub 12 using rivets 15. Each pendulum body includes two pendulum masses 14, which are axially arranged on one side of the web 13, which serves as a support for the pendulum body. Therefore, the secondary mass in this case incorporates a pendulum damping device 20, the web 13 of which forms a support.

[0114] Component 1 may also include an elastically restoring member 18, which restricts the rotation of the secondary mass relative to the primary mass about a first axis X1. In this case, two sets of concentric springs 18 are provided, which are bending springs. Figure 1 As shown, the web 13 includes two drive arms 19, 190, each defining a radially outward extension, and each of these drive arms 19, 190 contacts a set of springs 18 when the secondary mass rotates relative to the primary mass about a first axis X1. In the described example, the primary flywheel 2 defines a boundary for the radially outward movement of the springs 18.

[0115] exist Figure 1 , Figure 2 and Figure 3 In the middle, the oscillation damping device 20 is in a stationary state, that is, it does not filter torsional oscillations caused by the non-periodic behavior of the internal combustion engine.

[0116] like Figure 2 and Figure 3 As shown, the oscillation damping device includes:

[0117] - Support member 13, which is rotatable about a first axis X1 and includes a first drive arm 19 and a second drive arm 190, the first drive arm 19 and the second drive arm 190 extending radially and being diametrically opposed;

[0118] - The number of pendulum bodies is strictly equal to 2, namely the first pendulum body and the second pendulum body. Each pendulum body is movable relative to the support 13 and includes two pendulum masses 14 arranged axially on both sides of the support 13 respectively. The two pendulum masses 14 are fixed to each other by at least one connecting member 30.

[0119] - Two first rolling members 40, which guide the movement of the first pendulum body relative to the support 13, the two first rolling members 40 interacting with two first raceways 42 formed in the support 13 and two second raceways 43 formed in the first pendulum body; and

[0120] - Two second rolling members 400 guide the movement of the second pendulum body relative to the support member 13, and the two second rolling members 400 interact with two third raceways 420 formed in the support member 13 and two fourth raceways 430 formed in the second pendulum body.

[0121] Two first raceways 42 are positioned completely or partially orthogonally on both sides of the first drive arm 19, and two third raceways 420 are positioned completely or partially orthogonally on both sides of the second drive arm 190.

[0122] The rolling element 40 in this case is a roller, each roller maintaining a substantially constant diameter over its entire length.

[0123] exist Figure 2 and Figure 3 According to the first embodiment of the present invention, the swing damping device 20 may include:

[0124] - Two first raceways 42 are formed together in the support member 13 in the same common first hole 33;

[0125] - Two third raceways 420 are formed together in the support member 13 in the same common second hole 330;

[0126] - Two second raceways 43 defined by the edge of a single spacer 31 of the same connecting member 30 of the first pendulum body;

[0127] - Two fourth raceways 430 defined by the edge of a single spacer 31 of the same connecting member 30 of the second pendulum; and

[0128] - For each pendulum body, the connecting member 30 includes a single spacer 31 and a connecting device that connects the two pendulum masses 14 and the single spacer 31. In this case, the connecting device is a riveted connection device formed by a plurality of rivets 34.

[0129] like Figure 2 As shown, the device 20 may further include abutment damping members 50, which are adapted to simultaneously contact the spacer 31 and the support 13 in certain relative positions of the support 13 and the pendulum mass 14, such as abutting after movement from a rest position to filter torsional oscillations, or abutting when the pendulum descends radially. Each abutment damping member 50 is, for example, fixed to the pendulum, mounted on each pendulum, and arranged radially interposed between the spacer 31 and the profile 35 of the hole 33 in the pendulum. Each abutment damping member 50 includes, for example, one or more portions fastened to the spacer 31.

[0130] like Figure 2 As shown, a component, also referred to as a "pad," can be provided that is axially inserted between the pendulum body and the support 13. One or more pads are fixedly supported, for example, by each pendulum mass 14 on its surface facing the support 13. These pads can be fastened, for example, by pins 55 received in openings formed in the pendulum mass 14.

[0131] exist Figure 5 In the second embodiment of the present invention shown, the oscillation damping device 20 may include:

[0132] - Two first raceways 42 are formed separately in the support member 13 in two separate first holes 60;

[0133] - Two third raceways 420 are formed separately in the support member 13 in two separate second orifices 600;

[0134] - One of the second raceways 43 is defined by the edge of the first spacer 31 of the first connecting member 30 of the first pendulum body, and the other of the second raceways is defined by the edge of the second spacer 31 of the second connecting member of the first pendulum body;

[0135] - One of the fourth raceways 430 is defined by the edge of the first spacer 31 of the first connecting member of the second pendulum body, and the other of the fourth raceways 430 is defined by the edge of the second spacer 31 of the second connecting member of the second pendulum body;

[0136] - For each pendulum body, the connecting components include a first spacer 31 and a second spacer 31, and a connecting device that connects the first spacer 31 and the second spacer 31 to the two pendulum masses 14, wherein the connecting device is a riveted connection in this case.

[0137] Figure 7 A third embodiment according to the invention is shown, which differs from the first embodiment in that the first drive arm 19 and the second drive arm 190 can extend radially inward and can interact with a device for fastening the support member 13. In this example, the device for fastening the support member can be a hole formed in the first drive arm 19 and the second drive arm 190, into which a rivet is inserted to fasten the oscillating damping device to the secondary mass of the dual-mass flywheel.

[0138] like Figure 4 and Figure 6 As shown:

[0139] - A second axis X2 and a third axis X3 are defined, the second axis X2 extending radially through the first drive arm 19 and the second drive arm 190, and the third axis X3 perpendicular to the second axis X2 and the first axis X1;

[0140] - The two first raceways 42 may be formed together in the same common first hole 33 or in two separate first holes 60 considered separately together in the support 13, the common first hole 33 or the two separate first holes 60 having a first width L1 along the third axis X3, measured at a first position P1 along the second axis X2;

[0141] - Two third raceways 420 may be formed together in the same common second hole 330 or separately in two independent second holes 600 considered together in the support 13. The common second hole 330 or the two independent second holes 600 have a second width L2 measured along the third axis X3, the second width L2 being measured at a second position P2 along the second axis X2; and

[0142] - The support member 13 may include an outer contour 36 having a third width L3 measured at a first position P1 along the third axis X3 and a fourth width L4 measured at a second position P2 along the third axis X3.

[0143] The ratio of the third width L3 to the first width L1 can be between 1.05 and 1.5, and the ratio of the fourth width L4 to the second width L2 can be between 1.05 and 1.5.

[0144] exist Figures 1 to 8In all embodiments, the support 13 may include two straight and parallel outer edges 37, 38, which are positioned symmetrically with respect to the second axis X2.

[0145] Figure 8 The configuration of the damping device is shown, wherein the pendulum is positioned to abut after moving from its rest position in order to filter torsional oscillations. The outer contour 36 of the support 13 can be designed such that, regardless of the position of the pendulum and particularly at this abutment position, the support 13 can axially face the two pendulum masses 14 of the two pendulums.

[0146] like Figure 2 , Figure 3 and Figure 8 As specifically shown, the shapes of the two first raceways 42, the two second raceways 43, the two third raceways 420 and the two fourth raceways 430 can be selected such that each pendulum moves relative to the support 13, both by translating about an imaginary axis parallel to the first axis of rotation X1 of the support 13 and by rotating about itself, particularly about its center of gravity.

[0147] It must be emphasized that, based on this specification, the drawings and the appended claims, all features are obvious to those skilled in the art, and even if in practice only other given features are described individually and in any combination, they can be combined with other features or groups of features disclosed herein, provided that this is not expressly excluded and the technical circumstances do not make such a combination impossible or meaningless.

[0148] The use of the verbs “having,” “including,” and their variant forms does not exclude the presence of elements or steps other than those described in the claims.

[0149] In the claims, any reference numerals between parentheses should not be construed as limiting the claims.

Claims

1. A swing damping device (20), comprising: - Support member (13), which is rotatable about a first axis (X1) and includes a first drive arm (19) and a second drive arm (190), the first drive arm (19) and the second drive arm (190) extending radially and being diametrically opposed; - There are exactly two pendulum bodies, namely the first pendulum body and the second pendulum body, each of which is movable relative to the support (13) and includes two pendulum masses (14) arranged axially on both sides of the support (13) and at least one connecting member, the two pendulum masses (14) being fixed to each other by the at least one connecting member (30); - Two first rolling members (40) guide the movement of the first pendulum body relative to the support (13), the two first rolling members (40) interact with two first raceways (42) formed in the support (13) and two second raceways (43) formed in the first pendulum body; and - Two second rolling members (400) guide the movement of the second pendulum body relative to the support (13), the two second rolling members (400) interact with two third raceways (420) formed in the support (13) and two fourth raceways (430) formed in the second pendulum body; Its features are: - The support (13) is adapted to receive a number of pendulums strictly equal to two; and - The two first raceways (42) are positioned completely or partially orthogonally on both sides of the first drive arm (19), and the two third raceways (420) are positioned completely or partially orthogonally on both sides of the second drive arm (190).

2. The swing damping device (20) according to claim 1, wherein: - A second axis (X2) and a third axis (X3) are defined, the second axis (X2) extending radially through the first drive arm (19) and the second drive arm (190), and the third axis (X3) being perpendicular to the second axis (X2) and the first axis (X1). - The two first raceways (42) are formed together in the same common first hole (33) or individually in two separate first holes (60) in the support (13), the common first hole (33) or the two separate first holes (60) considered together having a first width (L1) measured along the second axis (X2) at a first position (P1) along the third axis (X3). - The two third raceways (420) are formed together in the same common second hole (330) or individually in two separate second holes (600) in the support (13), the common second hole (330) or the two separate second holes (600) considered together having a second width (L2) along the third axis (X3) measured at a second position (P2) along the second axis (X2); and - The support (13) includes an outer contour (36) having a third width (L3) measured at the first position (P1) along the third axis (X3) and a fourth width (L4) measured at the second position (P2) along the third axis (X3). The ratio of the third width (L3) to the first width (L1) is between 1.05 and 1.5, and the ratio of the fourth width (L4) to the second width (L2) is between 1.05 and 1.

5.

3. The oscillation damping device (20) according to any one of the preceding claims, wherein, The support (13) includes an outer contour (36) designed to ensure that the support (13) faces axially toward the two pendulum masses (14) of the two pendulum bodies as a whole, regardless of the position of the two pendulum bodies.

4. The oscillation damping device (20) according to any one of the preceding claims, wherein, The support member (13) includes two straight and parallel outer edges (37, 38) positioned symmetrically relative to a second axis (X2) that extends radially through the first drive arm (19) and the second drive arm (190).

5. The oscillation damping device (20) according to any one of the preceding claims, wherein, The first pendulum and the second pendulum together have a first moment of inertia (I1), and the support has a second moment of inertia (I2), the ratio of the first moment of inertia to the second moment of inertia being between 1 and 3.

5.

6. The oscillation damping device (20) according to any one of the preceding claims, wherein, The first drive arm (19) and the second drive arm (190) extend radially, particularly radially outward, so as to interact with each of the two elastically restoring members (18).

7. The oscillating damping device (20) according to any one of the preceding claims, wherein, The first drive arm (19) and the second drive arm (190) extend radially, particularly radially inward, to interact with the device used to fasten the support (13).

8. The oscillation damping device (20) according to any one of the preceding claims, wherein: - The two first raceways (42) are formed together in the same common first hole (33) in the support (13); - The two third raceways (420) are formed together in the same common second hole (330) in the support (13); - The two second raceways (43) are defined by the edge of a single spacer (31) of the same connecting member (30) of the first pendulum body; - The two fourth raceways (430) are defined by the edge of a single spacer (31) of the same connecting member (30) of the second pendulum; and - For each pendulum body, the connecting member (30) includes the single spacer (31) and a connecting device that connects the two pendulum masses (14) and the single spacer (31), the connecting device being in particular a riveted (34) or threaded connection or welded or press-fit connection.

9. The oscillating damping device (20) according to any one of the preceding claims, wherein, The shapes of the two first raceways (42), the two second raceways (43), the two third raceways (420), and the two fourth raceways (430) are chosen such that each of the pendulums moves relative to the support (13) both by translating about an imaginary axis parallel to the first axis of rotation (X1) of the support (13) and by rotating about itself, particularly about its center of gravity.

10. A component (1) for a transmission system of a motor vehicle, said component being a torsional damper, and comprising: - Primary component, the primary component including a torque input element; - Secondary component, said secondary component including the oscillation damping device (20) and torque output element according to any one of the preceding claims; and - An elastically restoring member (18), in particular a plurality of springs, which elastically rotatably connect the primary member and the secondary member.

11. A component (1) for a transmission system of a motor vehicle, said component being a dual-mass flywheel, and comprising: - Primary mass, the primary mass comprising a torque input element in the form of a primary flywheel (2) intended to be rotatably driven by a drive shaft; - A secondary mass, comprising a oscillating damping device (20) according to any one of the preceding claims and a torque output element in the form of a secondary flywheel or hub (12) capable of interacting directly or via a clutch with the driven shaft; and - An elastically restoring member (18), in particular a plurality of springs, wherein the elastically restoring member (18) elastically rotates to connect the primary mass and the secondary mass.

12. A drivetrain, particularly a drivetrain for a hybrid vehicle, comprising: - Component (1) according to claim 10 or 11, and - A wet or dry clutch or a dual clutch that receives output torque from the component (1).

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