• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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  • 优先权
    • 专利摘要:
    Propulsion chain for a motor vehicle, comprising: - a heat engine, in particular with three or four cylinders, and - a damping device (1), comprising: - a support (2) able to move in rotation about a axis (X), - at least one pair of first pendular masses (3), - at least one pair of second pendulum masses (4), the device (1) being configured so that - the first pendulum masses (3) ) make it possible to filter a first order value of the torsional oscillations, and - the second pendular masses (4) make it possible to filter a second order value of the torsional oscillations, different from the first order value, one at least one of the first order value and the second order value being equal to or multiple of the thermal engine excitation command, and the other of the first command value and the second command value. order being different from the order of excitation of this engine the rmic and a multiple of the order of excitation of the engine.
    公开号:FR3019872A1
    申请号:FR1453367
    申请日:2014-04-15
    公开日:2015-10-16
    发明作者:Ivan Dutier；Pascale Brassart；Giovanni Grieco；Benoit Fleche
    申请人:Valeo Embrayages SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for damping torsional oscillations, in particular for a motor vehicle transmission system.
    [0002] In such an application, the damping device can be integrated with a torsion damping system of a clutch capable of selectively connecting the heat engine to the gearbox, in order to filter the vibrations due to motor acyclisms. Alternatively, in such an application, the damping device may be integrated with a friction disc of the clutch.
    [0003] DE 10 2009 052 055 discloses a device for damping torsional oscillations comprising a support movable about an axis of rotation and a pair of pendular masses mounted on this support with a limited possibility of displacement with respect to the latter through rollers cooperating on the one hand with rolling tracks formed in the support, and on the other hand with rolling tracks formed in the pendular masses.
    [0004] Some pendulum masses are tuned to a first command value while other pendular masses are tuned to another command value, so as to efficiently filter torsional oscillations having different frequencies at a given engine speed. . There is a need to benefit from a device for damping torsional oscillations, in particular for a motor vehicle transmission system, which makes it possible to obtain efficient filtration of these oscillations. The invention aims to meet this need and it succeeds, according to one of its aspects, using a device for damping torsional oscillations, comprising: a support able to move in rotation about an axis, - at least one pair of first pendular masses, further comprising at least a first connecting member solidarisant the first pendular masses, said first connecting member defining at least a first raceway for a first member of bearing for guiding the displacement of the pair of first pendular masses relative to the support, - at least a pair of second pendular masses, further comprising at least a second connecting member solidarisant the second pendulum masses, said second connecting member defining at least one second raceway for a second rolling member for guiding the displacement of the pair of second pendulum masses by relative to the support, the device being configured in such a way that: the first pendular masses make it possible to filter a first order value of the torsional oscillations, and the second pendular masses make it possible to filter a second order value of the oscillations torsion, different from the first order value.
    [0005] The torsional oscillations may be related to the acyclisms of a heat engine associated with the device. For the purposes of the present application, an order value of the torsional oscillations is filtered when the amplitude at this order value of the torsional oscillations is reduced by the device by a value equal to at least 10% of the amplitude before filtering.
    [0006] For the purposes of the present application, the device is at rest when it does not act on the amplitude of the torsional oscillations, the amplitude of the latter remaining substantially constant between the input and the output of the device. Such a device thus makes it possible to satisfactorily filter the torsional oscillations over a wide range of frequencies, while using the connecting members both for securing the pendulum masses of a pair and for guiding the displacement of the pendulum masses. Since the device is configured to filter orders, the frequency of the torsional oscillations filtered by the first, respectively second, pendular masses varies as a function of the speed of rotation of the support. The use of the term "order" implies dealing with variable frequencies. 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 perpendicular to the axis of rotation of the support and intersecting this axis of rotation ", and" angularly "or" circumferentially "means" around the axis of rotation of the support ". Within each pair of pendular masses, one of the pendulum masses may be disposed on one side of the support and the other pendular mass may be disposed on a second side of the support. In this case, the race or tracks defined by each connecting member may be in at least one plane perpendicular to the axis of rotation of the support and cutting the support. The first order value filtered by the first pendular masses may be equal to the excitation order of a heat engine adapted to be associated with the device. The term "excitation of a heat engine" designates the number of explosions of this engine per revolution of the crankshaft. It is said that the first pendular masses are tuned to the first motor excitation order. The heat engine is for example used to propel a motor vehicle. The engine has three or four cylinders. In the case of a three-cylinder thermal engine, the excitation order of this motor is 1.5 The frequency filtered by the first pendular masses can then be variable, being for example equal to 25 Hz for a rotation speed crankshaft of this engine of 1000 rpm. This filtered frequency becomes equal to 50 Hz for a rotation speed of the crankshaft of the same engine of 2000 rpm and this excitation frequency becomes equal to 100 Hz for a rotation speed of the crankshaft of 4000 rpm. Thus, when the first pendular masses filter the excitation order of the engine, they filter different frequencies according to the rotational speed of the engine. In the case of a four-cylinder thermal engine, the excitation order of this engine is 2. The frequency filtered by the first pendular masses can similarly be variable, being for example equal to 33.3 Hz for a speed of crankshaft rotation of 1000 rpm. This filtered frequency becomes equal to 66.7 Hz for a crankshaft rotation speed of 2000 rpm and this excitation frequency becomes equal to 133.3 Hz for a crankshaft rotation speed of 4000 rpm. Thus, different frequencies are filtered by the first pendulum masses according to the speed of rotation of the motor. In a variant, the first order value filtered by the first pendular masses may differ from the order of excitation of the heat engine, being in particular between 0.8 times and 1.2 times that order of excitation of the heat engine. It will be said that the first pendular masses are detuned from the first motor excitation order. The second order value filtered by the second pendular masses may be equal to a multiple of the excitation order of the heat engine, for example to double or triple the excitation order of the heat engine. It will then be said that the second pendular masses are tuned to a multiple of the first motor excitation order, for example at the second or the third motor excitation order. In the cases mentioned above, when the second order value filtered by the second pendular masses is equal to twice the excitation order of the heat engine, this second order value is equal to three in the case of a three-cylinder and four-cylinder thermal engine in the case of a four-cylinder engine. According to an exemplary implementation of the invention, the first order value filtered by the first pendular masses differs from the order of excitation of the heat engine, being between 0.8 times and 1.2 times that order excitation of the heat engine, and the second order value filtered by the second pendular masses is equal to a multiple, in particular double, the order of excitation of the engine According to this example of implementation of the advantage of the invention is that the second pendulum masses, although tuned to a multiple of the first motor excitation order, also exert a filtering action of the motor excitation order. It is then possible, contrary to what is indicated in DE 10 2009 052 055, not to exactly match the first pendulum masses to the first excitation order of the motor, but to detune them of this first order, the first order value not being then more equal to the order of motor excitation. In this way, the amplitude of the displacement of the first pendular bodies is reduced, so that this amplitude is better adapted to the restricted space available within the damping device. The shocks that would suffer when abutting the first pendulum masses that would have a large amplitude of displacement are thus avoided, so that the saturation is reduced or eliminated in normal operation of the device, without this affecting the overall performance too much. filtering provided by the device. The pair of first pendular masses may be angularly offset from the pair of second pendulum masses. The pair of first pendular masses and the pair of second pendular masses may have substantially the same radial position. The device comprises for example two pairs of first pendular masses and two pairs of second pendular masses and each pair of first pendular masses can be arranged between two pairs of second pendulum masses, and vice versa.
    [0007] In a variant, each pair of second pendular masses can angularly overlap at least partially a pair of first pendular masses, the first pendular masses then being axially offset relative to the second pendulum masses. Each first pendular mass may extend angularly over a first angular sector measured from the axis of rotation of the support and each second pendulum mass may extend angularly over a second angular sector measured from the axis of rotation of the support, the value the first angular sector being greater than the value of the second angular sector. The first pendular masses thus have a shape different from that of the second pendulum masses, allowing their agreement with different order values. The measurement of the first and second angular sectors can be performed when the device is at rest. Alternatively, the value of the second angular sector may be greater than the value of the first angular sector. According to an exemplary implementation of the invention, each pair of first pendular masses comprises two first connecting members and the support comprises for each pair of first pendular masses two first openings spaced angularly, each first opening receiving one of the first liaison bodies. In other words, each first opening is dedicated to a single first connecting member. According to this example of implementation of the invention, an amount, made in one piece or not with the support, can be interposed between these first openings, and the first openings can then be, in a plane orthogonal to the axis of rotation, images symmetrical with respect to a line passing through the axis of rotation and by the amount. The line defining the axis of symmetry may be the bisector of the overall angle formed between the most opposite ends of the first two openings beyond the amount. Each first opening may extend between two circumferential ends on a third angular sector measured from the axis of rotation, and this first opening may, in a plane orthogonal to said axis, be asymmetrical with respect to a straight line passing through the axis of rotation. rotating and making with each circumferential end of the first opening an angle equal to half the value of said third angular sector. Such an opening shape can allow the displacement of the first pendular masses relative to the support combines a translation of said masses about an axis parallel to the axis of rotation and a rotation about their center of gravity of said masses. Each first connecting member may extend angularly in the trigonometric direction from a first to a second end of said first connecting member, each first connecting member being associated with a first stop member for moving the first pendular masses relative to the support, the first stop member associated with one of the first connecting members being closer to the first than the second end of the first connecting member, while the first stop member associated with the other first member link is closer to the second than the first end of this other first connecting member.
    [0008] When we observe the first connecting members from a direction parallel to the axis of rotation, it is thus found that the first stop members are not arranged at the same location of a first connecting member to the other. We will still speak of "asymmetrical positioning" of the first stop members. Such positioning of the first stop members makes it possible to increase the amplitude of the displacement of the first pendular masses. One can thus find a compromise between the need to have a high displacement amplitude of the first pendular masses to ensure effective filtering of torsional oscillations and the need that this amplitude does not generate saturation, as mentioned above. The positioning of the first stop members also makes it possible to move the center of gravity of the first pendulum masses radially outwards, thereby improving the filtering of the torsional oscillations by the device. Each first connecting member may define a single first raceway cooperating with a single first rolling member. Each first rolling member cooperating with a first raceway defined by a first connecting member may also cooperate with a raceway defined by the support, defined for example by a radially outer contour of the first opening receiving said first member. link.
    [0009] The first rolling member can thus guide the movement of the first masses relative to the support. Each first connecting member may be, in a plane orthogonal to the axis of rotation of the support, asymmetrical with respect to the normal tangent to the contact between the first rolling member and the first connecting member when the device is at rest. Such a form of first connecting member may allow, in addition or not to the previously mentioned asymmetrical form of first opening receiving said first connecting member, that the displacement of the first pendular masses relative to the support combines a translation of the masses around the an axis parallel to the axis of rotation of the support and a rotation of the first pendulum masses around their center of gravity. Each pair of first pendular masses can thus comprise: two first pendular masses, two first connecting members solidarisant these two pendular masses and being each received in a first opening in the support, two first rolling members, each first member rolling member cooperating on the one hand with a raceway defined by the support and a first raceway defined by one of the first bearing connecting members, and - first two abutment members, each first abutment member being associated with a first liaison body.
    [0010] Each pair of second pendular masses may comprise only one second connecting member and the support may comprise for each pair of second pendulum masses a single second opening receiving the second connecting member. Each second connecting member may have a plane of symmetry, this plane of symmetry containing the axis of rotation of the support when the device is at rest.
    [0011] Each second connecting member may extend angularly in the trigonometric direction from a first to a second end of said second connecting member, each second connecting member being associated with two second stop members for moving the second pendular masses relative to each other. to the support, one of the second abutment members being adjacent to the first end of said second connecting member while the other second abutment member is close to the second end of said second abutment member. The second stop members can thus be arranged symmetrically on the second connecting member, the symmetry being determined relative to the plane of symmetry defined above for the second connecting member. Each second opening may extend between two circumferential ends on a fourth angular sector measured from the axis of rotation, the value of this fourth angular sector being less than the value of the third angular sector. In other words, the second opening associated with a pair of second pendulum masses has an angular dimension smaller than that of each first opening associated with a pair of first pendular masses. This dimensioning makes it possible to obtain different order values for the first pendular masses with respect to the second pendulum masses. Similar to what has been described with respect to the displacement of the first pendular masses, the displacement of the second pendulum masses with respect to the support can combine a translation of the second pendulum masses about an axis parallel to the axis of rotation of the support and a rotation of the second pendulum masses around their center of gravity.
    [0012] As a variant, only the first pendular masses present this combined movement, the second pendular masses only moving in translation about an axis parallel to the axis of rotation. Each second connecting member may define two separate second race tracks, each second race track cooperating with a single second rolling member.
    [0013] The second raceways may have substantially the same shape and be angularly in the extension of one another. Each pair of second pendular masses can thus comprise: two second pendular masses, a single second connecting member solidarisant these two pendular masses and being received in a second opening formed in the support, two second rolling members, each second rolling member cooperating on the one hand with a raceway defined by the support and a second raceway defined by the second rolling member, and two second abutment members, each second abutment member being associated with the second member link. In all the foregoing, each first, respectively second, stop member is for example carried by the first two, respectively second, pendular masses connected by the first, respectively second, connecting member which this stop member is associated. Each first, respectively second, stop member extends for example axially between the first two, respectively second, pendular masses, and is secured to each of these pendular masses. Each first, respectively second, stop member may be configured to dampen shocks between the first, respectively second, connecting member and the support, the first and second respectively, abutment member can then be quality of "elastic" . Each first, respectively second, stop member may define: a first abutment zone against the support for the displacement of the first, respectively second, pendular masses relative to the support in the trigonometric direction, and a second abutment zone against the support for the displacement of the first, respectively second, pendulum masses relative to the support in the anti-trigonometric direction. Each abutment zone may be spaced apart from one another, so that the contact between the first and second abutment members and the support is effected at different locations of the abutment member in the direction of travel. first, respectively second, pendulum masses relative to the support, thereby reducing the wear of the abutment member which undergoes locally less shock against the support than in the prior art. Each first abutment member is for example configured so that: - one of the first and second abutment zone can come into contact with the radially inner contour of the first opening receiving the first connecting member, and - the other the first and the second abutment zone can come into contact with a lateral contour of said first opening, this lateral contour connecting the radially inner contour and the radially outer contour of the first opening. For two first connecting members associated with the same pair of first pendular masses, the interaction between said abutment areas and the support can be reversed. Thus, in an exemplary implementation of the invention: - one of the first stop members has a first abutment zone coming into contact with the lateral contour of the first opening when the first pendular masses are in a stop position at the end of a displacement relative to the support in the trigonometric direction, and a second abutment zone coming into contact with the radially inner contour of the first opening when the first pendular masses are in an abutment position at the end of a displacement relative to the support in the anti-trigonometric direction, and - the other first stop member has a first abutment zone coming into contact with the radially inner contour of the first opening when the first pendular masses are in a position of stop at the end of a displacement relative to the support in the trigonometrical direction and a second stop zone coming into contact with the con lateral turn of the first opening when the first pendular masses are in an abutment position at the end of a displacement relative to the support in the anti-trigonometric direction. Each first, respectively second, stop member may comprise elastic portions at the first and second stop zone, and the first, respectively second, connecting member and the first and second aperture respectively may have such shapes as that, when the first, respectively second, connecting member abuts against the support by one of the first and the second abutment zone under the effect of a force of inertia: - the elastic portion of said stop zone is compressed as the inertial force is less than a predefined value, and - the first, respectively second, connecting member comes into contact with the support when the inertia force is greater than this preset value. In other words, the elastic portions may be dimensioned so that the first, respectively second, abutment member alone absorbs the shocks associated with the abutment of the first, respectively second, connecting member against the support as the force related at this abutment is less than a predefined value. When this predefined value is exceeded, the first and second stop member can no longer be compressed further, so that the first or second connecting member comes into contact with the support, this contact then absorbing the shocks. It is thus possible: on the one hand to avoid having to dimension the elastic portions of the first or second stop member so that they absorb all of the shocks between the first and second connecting members and the support, and - on the other hand protect the elastic portions of damage when they are no longer capable of absorbing shocks since these shocks are then absorbed by the direct contact between the first and second respectively, connecting member with the support.
    [0014] According to an exemplary implementation of the invention, each first and second stop member respectively comprises: two holding rods spaced angularly, and a connecting piece, in particular integral with the holding rods, extending between the two rods and adapted to come into contact with the support when the first, respectively second, connecting member is in abutment therewith, the first stop zone comprising the portion of the connecting piece facing one of the rods and the second stop zone comprising the portion of the connecting piece facing the other rod. The connecting piece may be permanently or not in contact with the first, respectively second, connecting member. Each axial end of a holding rod is for example arranged in a recess provided in one of the first and second pendulum masses, respectively, so as to hold the first and second abutment members radially and angularly with respect to the first and second respectively. second, pendulum masses, and thus with respect to the first, respectively second, connecting member.
    [0015] The housings receiving the respective ends of a holding rod may be configured to provide axial retention of said rods, and therefore of the stop member. These are, for example, blind dwellings. In a plane orthogonal to the axis of rotation for the support, the joining piece may have at least one curved portion. The junction piece may have in this plane a band shape. The rods and the connecting piece can be made in one piece or not. When the rods and the connecting piece are separate parts, only the joining piece or only the retaining rods may have the elastic properties mentioned above allowing shock absorption. The joining piece is for example elastomer. In all of the above, the first, respectively second, raceway defined by a first, respectively second, connecting member may be formed by a portion of the contour of said connecting member. The first, respectively second, rolling track defined by the first, respectively second, connecting member is for example defined by only one part, in a plane orthogonal to the axis of rotation of the support, the radially outer contour of the first, respectively second, connecting member. The contour of the first, respectively second, connecting member may, at least at the level of the raceway, be defined or not by a coating formed on the remainder of this connecting member. Each of the first, respectively second, rolling track defined by a first, respectively second, connecting member and the raceway defined by the support may have one or more concave portions in a plane perpendicular to the axis of rotation of the support, these portions cooperating with the rolling member. The raceway defined by the support is for example defined by a portion of the contour, in particular the radially outer contour, of the first and second apertures, respectively, receiving the connecting member. The first, respectively second, rolling member is for example a roll of circular section in a plane perpendicular to the axis of rotation of the support. The axial ends of the roll may be devoid of a thin annular flange. Each first and second roller, respectively, can be solicited only in compression between the rolling tracks mentioned above. In all the foregoing, each first, respectively second, connecting member may be rigidly coupled to the first, respectively second, pendular masses, for example by welding, shrinking, or screwing. Each first, respectively second, connecting member may comprise two bars, each bar extending axially and comprising: a first region rigidly coupled to one of the first, respectively second, pendular masses of the pair, a second region rigidly coupled to the other first, respectively second, pendular mass of the pair, and - an intermediate region received in the first, respectively second, opening. The first region and the second region may form opposite ends of said bar. The two bars may be substantially identical. The first, respectively second, connecting member may comprise a connecting beam extending perpendicular to the two bars and being rigidly coupled to the intermediate region of each of said bars. Alternatively, the connecting beam which extends perpendicular to the two bars can be made in one piece with the latter. When the first, respectively second, connecting member comprises two bars and a connecting beam as defined above, the first, respectively second, tread defined by the connecting member may be formed by a portion of the contour radially. outside of the connecting beam. Each pair of pendular masses may comprise at least one interposition piece arranged axially between the support and a pendulum mass of said pair. Such an interposition piece makes it possible to avoid contact between the support and the pendular masses of said pair. When the support and the pendular masses are made of metal, the presence of this interposition piece avoids metal contact between pendular masses and support, and thus wear of these elements. In the examples considered, the interposition piece is a separate piece from the pendulum masses and the support. Each interposition piece can be carried by one of the pendulum masses. The interposition piece can be in the form of a pad. In all of the foregoing, the support may have a plurality of angularly adjacent cavities and disposed radially inwardly with respect to the first and second openings. These cavities may present in a plane orthogonal to the axis of rotation a flaring radially outwardly shape, the lateral edges of each diverging cavity when moving radially outwardly of the support. Such cavities can make it possible to optimize the inertia of the support of the device. In a variant of what has been described above, the first order value filtered by the first pendular masses is equal to the excitation order of the heat engine and the second order value filtered by the second pendulum masses differs from a multiple of this order of excitation of the engine, being in particular between 0.8 times and 1.2 times this multiple, for example between 0.8 times and 1.2 the double or between 0, 8 times and 1 , Twice the triple, of this order of excitation of the engine. It will be said that the second pendulum masses are detuned by this multiple of the motor excitation order. The invention further relates, in another of its aspects, to a component of a transmission system for a motor vehicle, in particular a double damping flywheel, a hydrodynamic torque converter, or a friction disk, comprising a device for depreciation as defined above. In such a component, the support of the pendulum may be one of: - a web of the component, - a guide washer of the component, - a phasing washer of the component, or - a separate support of said web, said washer of guide and said phasing washer. According to another of its aspects, the subject of the invention is also a propulsion chain for a motor vehicle, comprising: a heat engine, in particular with three or four cylinders, and a damping device as defined above , being in particular integrated with a component for a motor vehicle transmission system as defined above. According to another of its aspects, the subject of the invention is also a device for damping torsional oscillations, comprising: a support able to move in rotation about an axis, at least one pair of first pendulum masses - at least a pair of second pendulum masses, the device being configured in such a way that - the first pendular masses make it possible to filter a first order value of the torsional oscillations, and - the second pendulum masses make it possible to filter a second order value of the torsional oscillations, different from the first order value, at least one of the first order value and the second order value being equal to or multiple of the order of excitation of a heat engine adapted to be associated with the device, and the other of the first order value and the second order value being different from the excitation order of the heat engine and a multiple of the order excitation of the engine. All or some of the features mentioned above apply to this other aspect of the invention. In particular, the multiple above can be two or three.
    [0016] The first or the second order value different from the order of excitation of the heat engine, respectively of a multiple of this order can be between 0.8 times and 1.2 times this excitation order, respectively between 0.8 times and 1.2 times the multiple of this order of excitation.
    [0017] According to an exemplary implementation of this other aspect of the invention, the first order value is different from the excitation order of the heat engine and a multiple of this excitation order, and the second value of order is equal to a multiple, in particular double or triple, of the order of motor excitation. According to a variant of this example of implementation of this other aspect of the invention, the first order value is equal to the order of excitation of the heat engine and the second order value is different from this order of excitation and of a multiple, in particular double or triple, of the order of excitation of the motor. According to another of its aspects, the subject of the invention is also a propulsion chain for a motor vehicle, comprising: a heat engine, in particular with three or four cylinders, and a damping device as defined above . In all the above, the filtering by a first pendulum mass of the first order value is obtained by acting on all or part of the parameters mentioned below: -form of the first raceway defined a first connecting member, this first track cooperating with a first rolling member to guide the displacement of the first pendular mass relative to the support, - shape of the raceway defined by the support and cooperating with the first rolling member, - inertia of the first mass pendulum, - distance, when the device is at rest, between the center of gravity of the first pendular mass and the axis of rotation of the support, in particular the diameter of the first rolling member, - distance, when the device is at rest, between the center of gravity of the first pendulum mass and the radially inner edge of the first opening defining a point of attachment for this first mass pendulum.
    [0018] Similarly, in all the above, the filtering by a second pendulum mass of the second order value is obtained by acting on all or part of the parameters mentioned below: -form of the second raceways defined a second connecting member , these second tracks each cooperating with a second rolling member to guide the displacement of the second pendulum relative to the support, - shape of the raceway defined by the support and cooperating with the second rolling member, - inertia of the second pendulum mass, - distance, when the device is at rest, between the center of gravity of the second pendulum mass and the axis of rotation of the support, in particular the diameter of the second rolling member, - distance, when the device is at rest , between the center of gravity of the second pendulum mass and the radially inner edge of the second opening defining a hook point chage for this second pendulum mass. For example, the first raceways have shapes adapted to the filtration of the first order value while the second raceways have shapes adapted to the filtration of the second order value. The invention will be better understood on reading the following description of a non-limiting example of implementation thereof and on examining the appended drawing in which the single figure shows a damping device according to an example of implementation of the invention. There is shown in the figure a damping device 1 according to an exemplary implementation of the invention. The damping device 1 is of the pendulum oscillator type. The portion below the dotted line L of the figure corresponds to the device 1 at rest while the portion above this line L corresponds to the device 1 when it filters torsional oscillations. The device 1 is particularly suitable for equipping a motor vehicle transmission system, being for example integrated with a not shown component of such a transmission system such as a double damping flywheel, a hydrodynamic torque converter or a friction disk. . This component can be part of a propulsion system of a motor vehicle, the latter comprising a thermal engine including three or four cylinders. In known manner, such a component may comprise a torsion damper having at least one input element, at least one output element, and circumferential action elastic members which are interposed between said input and output elements. For the purposes of the present application, the terms "input" and "output" are defined with respect to the direction of torque transmission from the engine of the vehicle to the wheels of the latter. The device 1 comprises in the example under consideration: a support 2 able to move in rotation about an axis X, a plurality of first pendular masses 3 movable relative to the support 2, first connecting members 5 of the first pendulum masses 3, two first connecting members 5 connecting two first pendulum masses 3, so as to form a pair of first pendulum masses 3, - first rolling members 6, each first rolling member 6 being associated with a first member link 5, - a plurality of second pendular masses 4 movable relative to the support 2, - second connecting members 7 of the second pendulum masses 4, a second connecting member 7 connecting two second pendulum masses 4, so as to form a pair of second pendular masses 4, and - second rolling members 8, two second rolling members 8 being associated with a second connecting member 7. In the example considered, the device 1 comprises two pairs of first pendular masses 3 and two pairs of second pendular masses 4, the pairs of first pendular masses 3 being angularly arranged alternately pairs of second pendulum masses 4. The support 2 of the damping device 1 may be constituted by: - an input element of the torsion damper, - an output element or an intermediate phasing element disposed between two series of spring of the damper, or - a linked element in rotation to one of the aforementioned elements and separate from the latter, then being for example a support specific to the pendulum. The device 1 may in particular be carried by a guide washer or a phasing washer, and be disposed at the radially outer periphery of these washers.
    [0019] In the example considered, the support 2 generally has a ring shape having two opposite sides 10 which are here plane faces. The first pendular masses 3 belonging to the same pair are in the example considered axially spaced relative to each other, one of these first pendular masses 3 being disposed on the first side 10 of the support 2 and the other first pendulum mass 3 being disposed on the second side of the support 2. Similarly, the second pendular masses 4 belonging to the same pair are in the example considered axially spaced relative to each other, one of these second masses pendulum 4 being disposed on the first side 10 of the support 2 and the other second pendulum mass 4 being arranged on the second side of the support 2.
    [0020] Each first 3 and second 4 pendulum mass has generally in the example described a wafer shape and extends circumferentially in an arc so that these pendulum masses here have a radially inner edge and a radially outer edge which generally follow the edges corresponding of the support 2.
    [0021] In the example considered, each first pendulum mass 3 extends over a first angular sector al measured from the axis of rotation X of the support 2 when the device 1 is at rest and each second pendulum mass 4 extends over a second angular sector a2 measured from the axis of rotation X under the same conditions. As can be seen, al is in the described example greater than a2.
    [0022] Each first connecting member 5 extends angularly from a first 5.1 to a second 5.2 end in the trigonometric direction. Each first connecting member 5 is here rigidly coupled to each first pendulum mass 3 of a pair, that is to say that there is no degree of freedom between the first connecting member 5 and these first masses Similarly, each second connecting member 7 extends angularly from a first 7.1 to a second end 7.2 in the trigonometric direction. Each second connecting member 7 is here rigidly coupled to each second pendulum mass 4 of a pair, that is to say that there is no degree of freedom between the second connecting member 7 and these second masses 4. As can be seen in the figure, each connecting member 5 or 7 can comprise two substantially identical bars 13 and both extending parallel to the axis X. Each axial end of a bar 13 is example considered secured to one of the pendulum masses 3, 4 of the pair of pendulum masses. Each end of a bar 13 is for example received in a through hole formed in a pendulum mass 3, 4 and a riveting of said ends can then take place to allow the joining mentioned above.
    [0023] In the example considered, the first connecting member 5, respectively the second connecting member 7, thus forms a spacer defining in particular the axial separation between the first pendular masses 3, respectively second pendular masses 4, of a pair of masses. Pendulum. Still in the example considered, each connecting member 5 or 7 further comprises a connecting beam 17 extending perpendicular to the axis X. The connecting beam 17 is here rigidly coupled to the bars 13 at intermediate regions of these latter, arranged between the axial ends. As will be seen later, in the example considered: - the connecting beam 17 of each first connecting member 5 comprises a radially outer contour 19, a part of which defines a first rolling track 21, and - the connecting beam 17 of each second connecting member 7 comprises a radially outer contour 19 of which two distinct parts each define a second rolling track 22. Each connecting member 5 or 7 may be a one-piece piece obtained by striking. Alternatively, each connecting member 5 or 7 is made of at least two parts, respectively a part which forms the connecting beam 17 and which comprises at each end an axial hole for mounting in each hole of a pair of rivets constituting the bars 13. As shown in the figure, each first connecting member 5 may have an asymmetric shape relative to the normal N to the tangent T in contact, when the device 1 is at rest, between the first rolling member 6 and the rolling track 21 defined by this connecting member 5. In other words, the connecting member 5 extends further from one side of the other of this normal N in a plane orthogonal to the axis of rotation X. In However, in the example considered, each second connecting member 7 has a symmetrical shape with respect to a plane P containing the axis of rotation X when the device is at rest.
    [0024] As can be seen in the figure, each first connecting member 5 extends in part in a first opening 25 formed in the support 2. In the example considered, each pair of first pendular masses 3 is associated with two first openings 25 and each of these first openings 25 cooperates with a single first connecting member 5. The intermediate region of each bar 13 and the connecting beam 17 are for example received in the first opening 25. As will be seen later, the radially outer contour 26 of each first opening 25, which is defined by an edge of the support 2, comprises in the example considered a portion which defines a rolling track 27. In the plane of the figure, the first openings 25 associated with a pair of first pendular masses 3 may be symmetrical images of each other with respect to a line D passing through the axis of rotation X of the support 2 and the amount 28 separates The straight line D here forms a bisector of the maximum angle defined between an angular end 29 of one of these two first openings 25 and an angular end 29 of the other of these first two apertures. Angular end 29 is here defined by a lateral edge of the first opening 25. In addition, as shown in the figure, each first opening 25 can extend between its two angular ends 29 on a third angular sector a3 measured from the axis of rotation X of the support 2. In the plane of the figure, each first opening 25 may be asymmetrical with respect to a line DD passing through the axis X and making with each end 29 an angle equal to a3 / 2.
    [0025] As can be seen in the figure, each second connecting member 7 extends partly in a second opening 30 formed in the support 2. In the example considered, each pair of second pendulum masses 4 is associated with a single second opening 30 and this second opening 30 cooperates with a single second connecting member 7. The intermediate region of each bar 13 and the connecting beam 17 are for example received in the second opening 30. As will be seen later, the outline radially outer 31 of each second opening 30, which is defined by an edge of the support 2, comprises in the example considered a portion which defines a raceway 33.
    [0026] In the plane of the figure, each second opening 30 can extend between its two angular ends 34 on a fourth angular sector a4 measured from the axis of rotation X of the support 2. As can be seen, a4 is here less than a4. In the plane of the figure, each second opening 30 may be symmetrical with respect to a straight line passing through the axis X and making with each end 34 of this second opening 30 an angle equal to a4 / 2.
    [0027] As can be seen in the figure, the support 2 further comprises in the example shown cavities 36 angularly adjacent and arranged radially inwardly with respect to the first openings 25 and the second openings 30. These cavities 36 may have in the plane of the a shape flaring radially outwardly, the lateral edges 37 of each cavity 36 diverging when moving radially outwardly of the support 2.
    [0028] We will now describe more precisely the first rolling members 6 and the second rolling members 8 which are here identical. Each rolling member 6 or 8 is movable relative to the support 2 and the pendulum masses 3 or 4. In the example, each rolling member 6 or 8 is formed by a roller. Each roll has in the plane of the figure a circular section. Each roll may be full but, alternatively, it could be a hollow part, for example of tubular shape. Each roll is here has no annular rim provided at each of its axial ends and extending perpendicular to the axis X. Each first rolling member 6 cooperates in the example with a first track 21 and the track of bearing 27 mentioned above. More specifically, the first rolling member 6 cooperates radially inwardly with the first rolling track 21 and at the radially outer level with the rolling track 27 during its displacement relative to the support 2 and the first pendulum masses 3. The first The rolling member can be urged only in compression between the rolling tracks 21 and 27. Each second rolling member 8 cooperates in the example under consideration with a second running track 22 and the running track 33 mentioned above. More specifically, the second rolling member 8 cooperates radially inwardly with the second raceway 22 and at the radially outer level with the raceway 33 during its displacement relative to the support 2 and the second pendulum masses 4. The second The rolling member 8 can be urged only in compression between the raceways 22 and 33. In the example considered, the device 1 also comprises interposition pieces 51 arranged axially between each pendulum mass 3, 4 and the support 2. Each interposition piece 51 is here distinct from the pendulum mass 3, 4 and the support 2, being attached to the pendulum mass 3, 4.
    [0029] The number of interposition pieces 51 may vary according to whether they are borne by a first pendulum mass 3 or by a second pendulum mass 4. For a first pendulum mass 3, two substantially identical interposition pieces 51 are for example each mounted on one circumferential end of said mass while another interposition piece 51, of the same shape or not, is mounted on the first pendulum mass 3 halfway between the circumferential ends of said pendulum mass 3. For a second pendulum mass 4, two substantially identical interposition pieces 51 are for example each mounted on a circumferential end of said mass at the radially inner level while two other interposition pieces 51, of the same shape or not, are each mounted on a circumferential end of said mass at the radially outer level. Each interposition piece 51 may comprise: one or more studs intended to be mounted in a hole formed in the pendulum mass 3 or 4 to ensure the fixing on this mass of the interposition piece 51, and a part of interposition arranged between the pendulum mass 3 or 4 and the support 2 when the damping device 1 is assembled. The interposition portion of an interposition piece 51 has for example a circular shape in the plane of the figure. In the example of the figure, each interposition piece 51 is in the form of a pad, being in particular made of plastic, but the invention is not limited to this choice of material. As shown in the figure, each first connecting member 5 is associated with a first stop member 40 for moving the first pendular masses 3 relative to the support 2. For a pair of first pendular masses 3 to which are associated two first bodies 5, the first abutment member 40 for one of the first connecting members 5 is closer to the first end 5.1 than the second end 5.2 of the first connecting member 5 while the first abutment member 40 for the other first connecting member 5 is closer to the second end 5.2 than the first end 5.1 of the other first connecting member 5. Each first abutment member 40 is here secured to one of the first connecting members 5 .
    [0030] As shown in the figure, each second connecting member 7 is associated with two second stop members 41 for moving the second pendulum masses 4 relative to the support 2. For a pair of second pendulum masses 4 to which is associated a second member 7, one of the second stop members 41 may be closer to the first end 7.1 than the second end 7.2 of the second connecting member 7 while the other second stop member 41 is closer to the second end 7.2 that the first end 7.1 of the second connecting member 7. Each second stop member 41 is here secured to the second connecting member 7. Each stop member 40 or 41 defines in the example: - a first stop zone 42 against the support 2 for the displacement of the pendulum masses 3 or 4 with respect to the support in the trigonometric direction, and - a second zone of stop against the support 2 for the displacement of the pendulum masses 3 or 4 relative to the support in the anti-trigonometric direction, the second stop zone 43 being at a distance from the first stop zone 42. In the illustrated example, the first abutment members 40 are positioned inversely from a first connecting member 5 to the other of the same pair of first pendulum masses 3. One of the first connecting members 5 thus cooperates with a first stop member 40 positioned so that: - its first abutment zone 42 comes into contact with the lateral contour 29 of the first opening 25 when the first pendular masses 3 are in an abutment position at the end of a displacement relative to the 2 in the trigonometrical direction, this abutment position being shown in the figure, its second abutment zone 43 comes into contact with the radially inner contour 56 of the first opening 25 when The first pendular masses 3 are in an abutment position at the end of this displacement relative to the support 2 in the anti-trigonometric direction.
    [0031] The other first connecting member 5 cooperates meanwhile with a first stop member 40 positioned so that: - its first stop zone 42 comes into contact with the radially inner contour 56 of the first opening 25 when the first masses 3 are in an abutment position at the end of a displacement relative to the support in the trigonometric direction, and - its second abutment zone 43 comes into contact with the lateral contour 29 of the first opening 25 when the first pendular masses 3 are in an abutment position at the end of a displacement relative to the support 2 in the anti-trigonometric direction. Each first abutment member 40 comprises in the example in question elastic portions at the level of the first 42 and of the second 43 stop zone. These elastic portions on the one hand, the shapes of the first opening 25 and the first connecting member 5, on the other hand, may be such that, when the first connecting member 5 abuts against the support 2 via the one the first 42 and second 43 abutment zone under the effect of an inertial force: - the elastic portion of said abutment zone 42, 43 is compressed as the inertial force is less than a value predefined, and - the first connecting member 5 then comes into contact with the support 2 when the inertia force is greater than this preset value. Similarly, each second abutment member 41 may comprise elastic portions at the level of the first 42 and the second abutment zone 43 and these elastic portions on the one hand, and the shapes of the second opening 30 and the second connecting member. 7 may make it possible to obtain the compression of the elastic portions of the abutment member mentioned above in relation to the first abutment members 40. In the example considered, each abutment member 40 or 41 comprises: - two rods of maintenance 46 spaced angularly, and - a connecting piece 47 extending between the two holding rods 46 and adapted to come into contact with the support 2 when the connecting members 5 or 7 abut against it. The first abutment zone 42 is here formed by the portion of the connecting piece 47 facing one of the holding rods 46 and the second abutment zone 43 is then formed by the portion of the connecting piece 47 opposite the other holding rod 46. The holding rods 46 and the connecting piece 47 may be made in one piece or not. When the retaining rods 46 and the connecting piece 47 are separate parts, only the connecting piece 47 may have the elastic properties mentioned above for compressing the elastic portions of the stop member. The joining piece 47 is for example elastomer, having in the plane of the figure a strip shape. In the example considered, each axial end of a holding rod 46 is disposed in a recess in one of the pendulum masses 3 or 4. The housings here allow the holding of each retaining rod 46 in an axial position given by the pendular masses 3 or 4 between which it is interposed.
    [0032] The device 1 is configured in such a way that: the first pendular masses 3 filter a first order value of the torsional oscillations propagating in the propulsion chain of the vehicle at the level of the support 2 and the second pendulum masses 4 filter a second order value of these torsional oscillations, different from the first order value. In the example considered, the first order value is slightly different from the order of excitation of the heat engine. The order of excitation of the engine is for example 1.5 when the engine is three-cylinder and it can be 2 when the engine is four-cylinder. The first order value is for example 0.8 times and 1.2 times this order of excitation of the engine. Still in the example considered, the second order value is equal to a multiple of the excitation order of the heat engine. This multiple can be equal to two, so that the second order value is then equal to 3 when the heat engine is three-cylinder, and to 4 when the heat engine is four-cylinder.
    [0033] In the case of a three-cylinder thermal engine, the first order value is for example equal to 1.45, or 96.7% of the excitation order of this engine. In the case of a four-cylinder thermal engine, the first order value is for example equal to 1.95, ie 97.5% of the excitation order of this engine. The invention is not limited to the examples which have just been described.
    权利要求:
    Claims (18)
    [0001]
    REVENDICATIONS1. Propulsion chain for a motor vehicle, comprising: - a heat engine, in particular with three or four cylinders, and - a damping device (1), comprising: - a support (2) able to move in rotation about a axis (X), - at least one pair of first pendular masses (3), - at least one pair of second pendulum masses (4), the device (1) being configured so that - the first pendulum masses (3) ) make it possible to filter a first order value of the torsional oscillations, and - the second pendular masses (4) make it possible to filter a second order value of the torsional oscillations, different from the first order value, one at least one of the first order value and the second order value being equal to or multiple of the thermal engine excitation command, and the other of the first command value and the second command value. order being different from the order of excitation of this engine the rmic and a multiple of the order of excitation of the engine.
    [0002]
    2. Propulsion chain according to claim 1, the multiple of the order of excitation of the engine being equal to two or three.
    [0003]
    3. propulsion chain according to claim 1 or 2, the first or the second order value different from the order of excitation of the engine, respectively a multiple of this order, being between 0.8 times and 1.2 times this excitation order, respectively between 0.8 times and 1.2 times the multiple of this excitation order.
    [0004]
    4. propulsion chain according to any one of the preceding claims, the first order value being different from the excitation order of the heat engine and a multiple of this excitation order, and the second value of order being equal to a multiple, in particular double or triple, of the order of excitation of the heat engine.
    [0005]
    5. propulsion chain according to any one of claims 1 to 3, the first order value being equal to the excitation order of the heat engine and the second order value being different from this order of excitation and a multiple, including double or triple, the order of excitation of the engine.
    [0006]
    6. propulsion chain according to any one of the preceding claims, the pair of first pendular masses (3) being angularly offset from the pair of second pendulum masses (4).
    [0007]
    A propulsion chain according to any one of the preceding claims, each first pendulum mass (3) extending angularly over a first angular sector (a1) measured from the axis of rotation (X) of the support (2), and each second pendulum mass (4) extending angularly on a second angular sector (a2) measured from the axis of rotation (X) of the support (2), the value of the first angular sector (a1) being greater than the value of the second angular sector (a2).
    [0008]
    8. propulsion chain according to any one of the preceding claims, each pair of first pendulum masses (3) comprising two first connecting members (5) and the support (2) comprising for each pair of first pendulum masses (3) two first openings (25) spaced angularly, each first opening (25) receiving one of the first connecting members (5).
    [0009]
    9. propulsion chain according to claim 8, an amount (27) being interposed between the first openings (25), and the first openings (25) being, in a plane orthogonal to the axis of rotation (X), images symmetrical with respect to a line (D) passing through the axis of rotation (X) and the upright (27).
    [0010]
    Propulsion chain according to claim 8 or 9, each first opening (25) extending between two circumferential ends (29) on a third angular sector (a3) measured from the axis of rotation (X), and this first opening (25) being, in a plane orthogonal to said axis (X), asymmetrical with respect to a straight line (DD) passing through the axis of rotation (X) and making with each circumferential end (29) of the first opening (25) ) an angle equal to half the value of said third angular sector (a3).
    [0011]
    11. propulsion chain according to any one of claims 8 to 10, each first connecting member (5) extending angularly in the trigonometric direction from a first (5.1) to a second (5.2) end of said first member of link (5), each first connecting member (5) being associated with a first stop member (40) for moving the first pendular masses (3) relative to the support (2), the first stop member (40) associated with one of the first connecting members (5) being closer to the first (5.1) than to the second (5.2) end of this first connecting member (5), while the first stop member (40) associated with the other first connecting member (5) is closer to the second (5.2) than the first (5.1) end of the other first connecting member (5).
    [0012]
    12. propulsion chain according to any one of claims 8 to 11, each first connecting member (5) defining a single first raceway (21) cooperating with a single first rolling member (6).
    [0013]
    13. propulsion chain according to any one of claims 8 to 12, each pair of second pendulum masses (4) comprising only one second connecting member (7) and the support (2) comprising for each pair of second pendulum masses (4) a single second opening (30) receiving the second connecting member (7).
    [0014]
    14. propulsion chain according to claim 13, each second connecting member (7) extending angularly in the trigonometric direction from a first (7.1) to a second (7.2) end of said second connecting member (7), each second connecting member (7) being associated with two second stop members (41) for moving the second pendulum masses (4) relative to the support (2), one of the second stop members (41) being close to the first end (7.1) of said second connecting member (7) while the other second stop member (41) is close to the second end (7.2) of said second stop member (41).
    [0015]
    A propulsion chain according to claim 10 and one of claims 13 and 14, each second opening (30) extending between two circumferential ends (34) on a fourth angular sector (a4) measured from the axis of rotation. (X), the value of this fourth angular sector (a4) being smaller than the value of the third angular sector (a3).
    [0016]
    16. propulsion chain according to any one of claims 13 to 15, each second connecting member (7) defining two second raceways (22) separate, each second raceway (22) cooperating with a single second member of bearing (8).
    [0017]
    17. Propulsion chain according to any one of the preceding claims, comprising a component for a transmission system of a motor vehicle, in particular a double damping flywheel, a hydrodynamic torque converter or a friction disk, the damping device ( 1) being built into this component.
    [0018]
    18. propulsion chain according to claim 17, the support (2) of the pendulum being one of: - a veil of the component, - a guide washer of the component, - a phasing washer component, or - a separate support said web, said guide ring and said phasing washer. 25
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    同族专利:
    公开号 | 公开日
    FR3019872B1|2016-04-15|
    EP2933527A1|2015-10-21|
    EP2933527B1|2016-09-21|
    HUE031353T2|2017-07-28|
    DE102015102451A1|2015-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102009052055A1|2008-11-27|2010-10-21|Luk Lamellen Und Kupplungsbau Beteiligungs Kg|Centrifugal force pendulum device for vibration damping in dual mass flywheel of drive train of motor vehicle, has pendulum masses of two orders suspended at front side and rear side of rotating support disk|
    DE102011076790A1|2011-05-31|2012-12-06|Zf Friedrichshafen Ag|Drive system for a vehicle|
    DE102013213011A1|2012-07-06|2014-01-09|Schaeffler Technologies AG & Co. KG|Centrifugal pendulum device for vibration isolation|WO2017198922A1|2016-05-19|2017-11-23|Valeo Embrayages|Device for damping torsional oscillations for a vehicle transmission system|
    FR3049031B1|2016-03-21|2018-04-20|Valeo Embrayages|PENDULAR DAMPING DEVICE|
    JP6709765B2|2017-09-15|2020-06-17|株式会社エクセディ|Torque fluctuation suppressing device, torque converter, and power transmission device|
    EP3959452A1|2019-04-25|2022-03-02|Volvo Truck Corporation|A flywheel arrangement, a vehicle and a method of manufacturing a flywheel arrangement|
    法律状态:
    2015-04-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-04-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-04-26| PLFP| Fee payment|Year of fee payment: 5 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-15| ST| Notification of lapse|Effective date: 20201214 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1453367A|FR3019872B1|2014-04-15|2014-04-15|TORSION OSCILLATION DAMPING DEVICE|FR1453367A| FR3019872B1|2014-04-15|2014-04-15|TORSION OSCILLATION DAMPING DEVICE|
    HUE15155720A| HUE031353T2|2014-04-15|2015-02-19|Device for damping torsional oscillations|
    EP15155720.4A| EP2933527B1|2014-04-15|2015-02-19|Device for damping torsional oscillations|
    DE102015102451.9A| DE102015102451A1|2014-04-15|2015-02-20|Device for damping torsional vibrations|
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