WO2017153549A1 - Torsion damper, in particular for a motor vehicle clutch - Google Patents

Torsion damper, in particular for a motor vehicle clutch Download PDF

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Publication number
WO2017153549A1
WO2017153549A1 PCT/EP2017/055610 EP2017055610W WO2017153549A1 WO 2017153549 A1 WO2017153549 A1 WO 2017153549A1 EP 2017055610 W EP2017055610 W EP 2017055610W WO 2017153549 A1 WO2017153549 A1 WO 2017153549A1
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WO
WIPO (PCT)
Prior art keywords
deformable element
elements
rotation
damper
shock absorber
Prior art date
Application number
PCT/EP2017/055610
Other languages
French (fr)
Inventor
Christophe Dhalleine
Fabien LEBEAU
Daniel Fenioux
Original Assignee
Valeo Embrayages
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Embrayages filed Critical Valeo Embrayages
Publication of WO2017153549A1 publication Critical patent/WO2017153549A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/133—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
    • F16F15/1338—Motion-limiting means, e.g. means for locking the spring unit in pre-defined positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/133—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
    • F16F15/1333—Spiral springs, e.g. lying in one plane, around axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/133—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
    • F16F15/1336—Leaf springs, e.g. radially extending

Definitions

  • Torsion damper in particular for a clutch of a motor vehicle
  • the invention relates to a torsion damper, in particular for a clutch of a motor vehicle.
  • the elastic damping means generally fitted to the torsion dampers are coil springs with a circumferential effect, the ends of which, on the one hand, bear against integral supports of the input elements and, on the other hand, on the other hand, in support against solidarity support of the output elements.
  • any rotation of one of said elements relative to the other causes a compression of the springs of the damper in one direction or the other and said compression exerts a restoring force able to return said elements to a relative angular position. rest.
  • the coil springs can be straight or bent.
  • FR3008152 which describes a double damping flywheel provided with elastic arms for transmitting a torque between a first element and a second element (flywheels of primary and secondary inertia).
  • the invention aims to improve the torsion dampers above, in particular by reducing the noise during the abutment of the first and second elements or input and output elements.
  • the invention thus proposes a shock absorber, in particular a torsion damper, in particular for an automobile clutch, comprising:
  • the damper being characterized in that it comprises, for at least a first direction of relative rotation of the first and second elements, an end-of-stroke device allowing progressive abutment between the first and second elements, the end device stroke comprising a deformable element provided with an elastic blade arranged to exert a force opposing the further relative rotation of the first and second elements in the first direction of relative rotation when these elements come into progressive abutment.
  • Limiting the angular movement by means of such a limit device makes it possible at the same time to protect the transmission member and to limit the noise in the event of transmission of an overtorque, resulting, for example, from limited use conditions or from a
  • the deformable element absorbs, without noise and without shock, a large part of this overtorque.
  • the end of the race is thus progressively
  • the elastic blade of the end-of-stroke device is distinct from the transmission member.
  • the elastic blade is arranged to deform during progressive abutment between the first and second elements.
  • the elastic blade is in the rest state outside the progressive abutment.
  • the elastic blade is prestressed outside the progressive abutment.
  • the deformable element comprises a fastener mounted on a support of one of the first and second elements.
  • the end-of-stroke device further comprises a bumper carried by the other of the first and second elements, the deformable element and the stopper being arranged so as to bear against each other during the abutment progressive between the first and second elements, in the first direction of relative rotation
  • the elastic blade of the deformable element is able to deform and exert an elastic return force, under the action of the forces exerted by the stopper on the deformable element, so as to produce progressive abutment between the first and second elements.
  • the elastic restoring force exerted by the elastic blade is able to oppose additional relative rotation of the first and second elements in the first direction of relative rotation.
  • the deformable element is distant from the buffer before the first and second elements reach the phase of progressive abutment.
  • the end-of-stroke device is arranged to make it more difficult for the additional relative rotation of the first and second elements in the first direction of relative rotation during the phase of progressive abutment.
  • the angular displacement of the first and second elements, between a first relative angular position of rest, adopted by the damper in the absence of torque to be transmitted, and the beginning of the progressive abutment, is greater than 20 °, especially higher at 45 °, for example greater than 60 °.
  • the phase of progressive abutment can correspond to a relative rotation of a minimum angle of 0.5 °, in particular 1 °.
  • the phase of progressive abutment can correspond to a relative rotation of a maximum angle of 5 °, for example 3 °, in particular 1 °.
  • the end-of-stroke device is arranged such that a phase of integral rotation follows the phase of progressive abutment.
  • the first and second elements abut against each other and rotate together, so as to prevent relative rotation between the first and second elements, in the first direction of relative rotation .
  • the phase of integral rotation is a phase of torque transmission without damping.
  • the rotational phase of solidarity occurs, in the first direction of relative rotation, after the phase of progressive abutment.
  • the end-of-stroke device ceases to produce the progressive abutment and ensures the end stop.
  • the end-of-travel device comprises a stop element arranged to terminate the deformation of the deformable element in the first relative direction of rotation and to cause the first and second elements in a fixed rotation.
  • the stop member is arranged such that, in the non-damping transmission phase, the torque is transmitted between the bumper and the stop member to drive the first and second members in integral rotation.
  • the stop element is arranged on a projecting element for example formed in the mass of one of the first and second elements.
  • Said one of the first and second elements comprises a support on which is mounted the attachment of the deformable element.
  • the support is formed on a projecting element for example formed in the mass of one of the first and second elements.
  • the fastener is secured to the support by fasteners such as screws or rivets.
  • the stop member has a stop surface formed on the support of the deformable member.
  • the stop member is formed on the support.
  • the attachment of the deformable element and the elastic blade are formed in one piece.
  • the damper further comprises at least one opposite end-of-travel device arranged to allow progressive abutment between the first and second and second elements, in a second direction of relative rotation (B) of the first and second elements, opposite to the first direction of relative rotation.
  • the opposite end-of-travel device comprises an opposite deformable element arranged to deform in the second relative direction of rotation.
  • the deformable element and the opposite deformable element are formed in one piece. In other words, this part ensures the progressive abutment bidirectionally.
  • the opposite end-of-travel device comprises an opposite bumper arranged to abut against the opposite deformable element to allow progressive abutment between the first and second elements, in the second direction of relative rotation (B) of the first and second elements.
  • the opposite deformable element is provided with an opposing elastic blade arranged to exert a force opposing the continuation of the relative rotation of the first and second elements in the second relative direction of rotation (B) when these elements come into progressive abutment. .
  • the opposite end-of-travel device comprises an opposite stop element arranged to limit the deformation of the opposite deformable element in the second relative direction of rotation.
  • the bumper bears against the fastener and circumferentially pushes the fastener to deform the blade of the deformable element during the progressive abutment.
  • the end-of-stroke device comprises a shock absorber arranged between the deformable element and the stopper to absorb the shock between the deformable element and the stopper when the deformable element and the stopper come into abutment. one against the other.
  • a shock absorber arranged between the deformable element and the stopper to absorb the shock between the deformable element and the stopper when the deformable element and the stopper come into abutment. one against the other.
  • the shock absorber is arranged to deform during progressive abutment of the first and second elements. This allows to generate an additional stiffness of end of race.
  • the shock absorber is made of deformable material, such as elastomer, for example rubber.
  • the shock absorber is overmoulded on the deformable element or on the bumper.
  • the shock absorber is an insert fitted on the deformable element or on the bumper.
  • the shock absorber is arranged to rub against one of the first and second elements on which the deformable element is mounted so as to provide end of stroke hysteresis.
  • the end-of-stroke device is arranged in such a way that the stopper comes to bear directly against the stop element in the phase of rotation integral with the first and second elements.
  • the torque passes through the deformable element only during the phase of progressive abutment.
  • the end-of-stroke device is arranged so that the deformable element is clamped between the stopper and the stop element in the phase of rotation integral with the first and second elements, otherwise said when the first and second elements are in abutment.
  • the elastic blade is arranged to be held tight between the stopper and the stop element when the first and second elements are in abutment
  • the fastener is arranged to be held tight between the stopper and the stop element in the first final stop position of the first and second elements when the first and second elements are in abutment.
  • the attachment of the deformable element is mounted on one of the first and second elements around a pad, the deformable element comprising at least one mounting loop, each mounting loop being mounted around the pad (s). ). Thus, no additional fastener is needed.
  • the attachment of the deformable element comprises two mounting loops mounted around two pads.
  • the elastic blade extends between the two mounting loops
  • the deformable element is mounted around the two studs so that the blade is maintained prestressed between the two studs.
  • the end-of-stroke device is arranged so that the bumper bears against the loop to allow progressive abutment between the first and second elements.
  • the stop surface is formed on this pad.
  • a game is formed between the loop and the stop surface formed on the pad to allow movement of the loop during the deformation of the deformable element.
  • the transmission member comprises at least one elastic arm capable of flexing and transmitting a torque between the first and second elements, the bending of the elastic arm being, in the first transmission phase, accompanied by a relative rotation between the first and the second. second element according to the axis of rotation X.
  • the elastic arm and the blade of the deformable element are arranged in parallel. - The progressive abutment is triggered angularly, when the first and second elements reach a predetermined relative angular position.
  • the transmission member comprises a plurality of resilient arms preferably arranged symmetrically with respect to the axis of rotation.
  • the damper comprises two transmission members located on the same plane, the transmission members being preferably arranged symmetrically with respect to the axis of rotation.
  • the transmission member (s) is (are) carried by one of the first and second elements
  • the transmission member or members is (are) carried by one of the first and second members and each elastic arm is provided with a camming surface cooperating with a cam follower carried by the other of said first and second elements.
  • the cam surface is arranged on a bent portion of the elastic arm about the axis of rotation X.
  • the cam surface is arranged such that, in a relative angular position of the first and second elements angularly offset relative to a relative angular position of rest, the cam follower exerts a bending force on the elastic arm producing a force of reaction of the resilient arm adapted to return said first and second elements to said angular position of rest.
  • the elastic arm of the transmission member is adapted to deform by bending in a plane perpendicular to the axis of rotation.
  • the cam follower comprises a roller arranged to roll on the cam surface of the elastic arm.
  • the roller is rotatably mounted by means of a rolling bearing, ball or needle.
  • the roller may be arranged between the first and second members to roll both on the cam surface of the resilient arm carried by one of the first and second members and a cam surface carried by the other member.
  • first and second elements may be arranged between the first and second members to roll both on the cam surface of the resilient arm carried by one of the first and second members and a cam surface carried by the other member.
  • the elastic arm has a free end zone moving with a radial component when the elastic arm flexes.
  • the transmission member is a curved spring arranged circumferentially around the axis of rotation X.
  • the damper comprises a plurality of curved springs arranged circumferentially around the axis of rotation X.
  • the cam follower is housed in a housing lined, at least in part, by the support of the deformable element.
  • the deformable element and the opposite deformable element are arranged, circumferentially, on either side of the cam follower.
  • the elastic blade and the opposite elastic blade are arranged, circumferentially, on either side of the cam follower.
  • the cam follower comprises a roller mounted to rotate about a rod and the fastener of the deformable element is arranged around this rod so as to ensure the recovery of the radial forces exerted by the elastic arm on the roller.
  • the rod is formed on one of the fastening elements of the fastener.
  • the elastic blade of the deformable element is able to deform by bending in a plane orthoradial to the axis of rotation X.
  • the deformable element is formed in a sheet
  • the deformable element and the opposite deformable element comprise a common fastener.
  • the attachment of the bidirectional limit device is disposed in a plane perpendicular to the axis of rotation.
  • the attachment of the bi-directional limit device covers, at least partially, the cam follower.
  • the elastic blade is connected to the fastener by a bent portion so that the elastic blade of the deformable element extends in a direction substantially perpendicular to the attachment of the deformable element.
  • the deformable element of the bi-directional end-of-stroke device has an arcuate shape about the axis of rotation X and has at its ends the elastic blade and the opposite resilient blade, and between them, the fastener.
  • the deformable element and the opposite deformable element are formed on separate parts.
  • the fastener is mounted on its support with a possibility of circumferential movement and the deformation of the deformable element during the progressive abutment is accompanied by a circumferential movement of the fastener.
  • the attachment of the deformable element is a sliding fastener.
  • the clip is mounted by simply sliding on the support.
  • the attachment of the deformable element comprises notches arranged for
  • the deformable element has an arcuate shape and the rails extend circumferentially around the axis of rotation X on an angular sector between 10 and 30 degrees.
  • the rails are formed in the mass of the support.
  • the deformable element comprises at one end a tongue forming an elastic blade, the tongue having a connecting elbow with the fastener
  • the tongue is preloaded outside the progressive abutment
  • the deformable element is mounted so that a portion of the tongue, in particular its end zone, is in contact with the support, in particular the stop surface, when the buffer is at a distance from the deformable element.
  • the deformable element is mounted so as to allow deformation of the elbow of the deformable element and a pivoting of the tongue under the action of the forces exerted by the stopper during the progressive abutment.
  • the deformable element is arranged in the damper so that when the elbow of the tongue is deformed, the clip slides along the rails.
  • the tongue is arranged to deform in an orthoradial plane relative to the axis of rotation X.
  • the progressive abutment can be stopped thanks to the free stop formed by the stop surface formed on the support.
  • the frank abutment is thus obtained when the elbow is deformed sufficiently so that, from its end zone to its elbow, the tongue is in abutment against the stop surface.
  • the attachment of the deformable element further comprises a tab arranged in a recess of the support so as to stop the return of the deformable element under the action of the restoring force of the elastic blade.
  • the damper is arranged so that the tab of the deformable element abuts in a wall of the recess when the transmitted torque has dropped and the elastic restoring force has brought the deformable element back to its initial position.
  • the deformable element is manufactured by cutting and folding and / or stamping a sheet such as a spring steel.
  • the attachment of the deformable element is fixed on the support by means of a fastening element such as a rivet.
  • the deformable element is a corrugated sheet and the elastic blade is formed by laces of this corrugated sheet arranged to be closer to each other under the action of the forces exerted by the bumper on these laces.
  • the corrugated sheet is arranged so that the stop comes to bear against the support lace opposite to the fastener during the progressive abutment.
  • the corrugated sheet is able to deform by bending in a portion of a cylinder around the axis of rotation X.
  • the corrugated sheet has a first flat end on which the fastener is formed.
  • the corrugated sheet has a second flat end and the stopper is arranged to pass over the second flat end before leaning against said support lace during the progressive abutment.
  • the end - of - stroke device comprises a stop element formed in the mass of the first or second element on which the corrugated sheet is fixed.
  • the stop element is formed on the end of a tooth extending circumferentially around the axis X.
  • the end-of-stroke device is arranged in such a way that the stopper comes to bear directly against the stop element in the rotation phase solidary of the first and second elements.
  • the torque passes through the deformable element only during the phase of progressive abutment.
  • the bumper is arranged so as to bear against the corrugated sheet during progressive abutment and directly against the stop element of the tooth during the phase of rotation of the first and second elements.
  • the deformable element and the opposite deformable element are formed on the same part.
  • the deformable element and the opposite deformable element have a common fastener.
  • the fastener is attached to one of the first and second elements with fasteners such as rivets.
  • the elastic blade is formed on a finger extending radially from the fastener, this finger being arranged to be biased in the first direction of relative rotation.
  • Two elastic fingers extend radially from the common fastener.
  • An opposing elastic finger is arranged to be biased in the opposite direction to the first direction of relative rotation.
  • Each finger has a connecting elbow with the clip.
  • Each bend is arranged to deform during progressive abutment in the first direction of relative rotation or in the opposite direction, respectively when the bumper or the opposite bumper bears against the finger or the opposite finger.
  • the clip is attached to one of the first and second members within the cam follower.
  • the two fingers extend radially on either side of the roller.
  • the stopper is arranged to bear against a free end area of the finger.
  • the protruding element in which the cam follower is mounted has a stop member on which the finger can abut.
  • the projecting element respectively comprises, circumferentially on either side of the cam follower, a stop member and an opposite stop member on which can abut respectively the finger and the opposite finger.
  • Each stop member is a stop surface extending substantially radially and perpendicularly to the X axis.
  • Each finger has, on its end zone, a shock absorber.
  • the shock absorber is arranged to absorb the shocks between the deformable element and the bumper when the deformable element and the bumper bear against each other. Thus, there is almost no noise during the contact between the deformable element and the stopper at the beginning of the progressive abutment.
  • the shock absorber is arranged to absorb shocks between the finger and the stop member when the finger and the stop member bear against each other.
  • Two shock absorbers are arranged to respectively absorb shocks respectively between the finger and the stop member and between the opposite finger and the opposite stop member.
  • Each shock absorber is arranged to deform during the progressive abutment of the first and second elements. This allows to generate an additional stiffness of end of race.
  • Each shock absorber is made of deformable material, such as elastomer, for example rubber.
  • the same shock absorber is solicited both at the beginning of the progressive abutment and at the end of progressive abutment, when the finger bears against the stop element.
  • the deformable element and the deformable element are formed in one piece and comprise a common elastic blade.
  • the fastener comprises two loops each mounted around a support in the form of a stud. Thus, no additional fastener is needed.
  • the elastic blade extends between the two mounting loops.
  • the blade comprises at least one lace capable of bending during progressive abutment.
  • the deformable element is mounted around the two studs so that the blade is maintained prestressed between the two studs. In other words, the elastic blade is compressed inside the two studs.
  • the end-of-stroke device is arranged so that at least one stop comes to bear against one of the loops to allow the progressive stop between the first and second elements.
  • a clearance is provided between the loop ensuring the progressive abutment and the stud, on the side of the stud opposite to the blade, to allow deformation of the blade and approximation of the loops during the deformation of the element deformable.
  • the stud has a stop member blocking the movement of the loop and thus ending the progressive abutment.
  • the stop element is a stop surface formed on the stud, on the opposite side to the blade.
  • the loop is clamped respectively between one of the stopper and one of the pads.
  • the elastic blade of the deformable element is able to deform by bending in a plane perpendicular to the axis of rotation X.
  • the blade of the deformable element here comprises a plurality of laces arranged to approach each other during the progressive abutment.
  • the transmission member of the damper comprises at least one elastic arm and the elastic blade and at least a portion of this arm are arranged axially facing each other. .
  • the deformable element is carried by one of the first and second elements and the end-of-travel device further comprises a bumper carried by the other of the first and second elements, the deformable element and the bumper being arranged so as to bear against each other during progressive abutment between the first and second elements, in the first relative direction of rotation A, the elastic blade of the deformable element being adapted to deform under the action of the forces exerted by the stopper on the deformable element, so as to produce progressive abutment between the first and second elements in the first direction of relative rotation (A).
  • the end-of-stroke device comprises a stop element arranged to put an end to the deformation of the deformable element in the first relative direction of rotation and to cause the first and second elements in a fixed rotation.
  • the end-of-stroke device is arranged so that the progressive abutment begins when the torque transmitted by the damper exceeds a first torque threshold, for example greater than 200N.m
  • the integral rotation starts when the torque transmitted by the damper exceeds a second torque threshold, the second torque threshold being greater than the first torque threshold;
  • the end-of-stroke device is arranged so that, during the phase of rotation of the first and second elements preventing any additional relative rotation between the first and second elements in the first relative direction of rotation, the elastic blade of the deformable element remains deformed and exerts an elastic return force on the stopper capable of rotating the first and second elements in the opposite direction to the first direction of relative rotation when the torque transmitted between the first and second elements becomes less than the second threshold of couple.
  • the phase of integral rotation is reversible. It is not a locking rotation of the first and second elements.
  • the end-of-stroke device is devoid of rotation locking means of the first and second elements acting simultaneously in the two directions of relative rotation.
  • the stop member is arranged to terminate deformation of the deformable member only in the first direction of relative rotation. In other words, when the stopper and the stop member are pressed against each other, a single direction of relative rotation is prevented. Thus, the damper is not blocked.
  • the end-of-stroke device is arranged in such a way that the portion of the deformable element against which the stopper bears is pushed circumferentially by the stopper during the phase of progressive abutment.
  • the elastic blade is deformed in a plane perpendicular to the X axis to store a larger over-torque.
  • the deformable element is distant from the buffer before the first and second elements reach the phase of progressive abutment.
  • the deformable member is arranged to rub against said one of the first and second members that carries it during the phase of progressive abutment.
  • the deformable element can rub against said element by means of a shock absorber.
  • deformation In the present application and in the expression "put an end to deformation", the term deformation must be understood in its dynamic sense. This means that in the phase of integral rotation, the deformable element remains deformed following the phase of progressive abutment, but does not further deform. In other words, the deformable element ceases to deform further when a torque is transmitted between the stopper and the stop element.
  • the invention also relates to a double damping flywheel according to the invention as described above, the first element being one of the flywheels of primary and secondary inertia and the second element being the other flywheels of inertia primary and secondary
  • FIG. 1 is a front view of a double damping flywheel comprising an end-of-travel device according to a first embodiment of the invention, the relative angular position of the two wheels being here remote from the end of travel.
  • FIG. 2 is a sectional view on II-II of the double damping flywheel of FIG. 1.
  • FIG. 3 is a diagrammatic perspective view of the deformable element of the double damping flywheel of FIG. 1
  • Figure 4 is a schematic perspective view of the deformable element of a double damping flywheel according to a second embodiment, the deformable element being shown in the rest position.
  • Figure 5 is a schematic front view of the deformable element of the double damping flywheel of Figure 4, the deformable element being shown in the rest position.
  • FIG. 6 is a schematic view along section A-A of the deformable element of FIG. 5.
  • Figure 7 is a schematic perspective view of the deformable element of a double damping flywheel according to a third embodiment, the deformable element being shown in the rest position.
  • Figure 8 is a schematic perspective view of the deformable element of a double damping flywheel according to a fourth embodiment, the deformable element being shown in the rest position.
  • FIG. 9 is a schematic and partial sectional view of the double damping flywheel of FIG. 8.
  • Figure 10 is a schematic perspective view of the deformable element of a double damping flywheel according to a fifth embodiment, the deformable element being shown in the rest position.
  • Figure 11 is a schematic perspective view of the deformable element of a double damping flywheel according to a sixth embodiment, the deformable element being shown in the rest position.
  • FIG. 12 illustrates the phases of damper operation and in particular the phase of progressive abutment P1 '.
  • the terms "external” and “internal” as well as the “axial” and “radial” orientations will be used to designate, according to the definitions given in the description, elements of the double damping flywheel.
  • the "radial” orientation is directed orthogonally to the X axis of rotation of the double damping flywheel determining the “axial” orientation and, from the inside towards the outside away from said axis X, the "Circumferential” orientation is directed orthogonally to the X axis of rotation of the double damping flywheel and perpendicular to the radial direction.
  • “Circumferentially” means in the circumferential direction and does not necessarily imply a closed curve here.
  • the shock absorber shown is a damper type double damping flywheel in which the first element is a primary flywheel and the second element is a secondary flywheel.
  • the deformable element is mounted on the primary flywheel while the (s) stop (s) is (are) mounted (s) on the secondary flywheel.
  • An inverted mounting that is to say with the deformable element mounted on the secondary flywheel is nevertheless possible for these embodiments.
  • the deformable element is mounted on the secondary flywheel while the (s) stop (s) is (are) mounted (s) on the primary flywheel.
  • An inverted assembly that is to say with the deformable element mounted on the primary flywheel is nevertheless possible for these two embodiments.
  • the dual damping flywheel 1 comprises a primary flywheel 2, intended to be attached to the end of a crankshaft of an internal combustion engine , no shown, and a secondary flywheel 3 which is centered and guided on the primary flywheel 2 by means of a rolling ball bearing 4.
  • the secondary flywheel 3 is intended to form the reaction plate of a clutch, no shown, connected to the input shaft of a gearbox.
  • the primary flywheels 2 and secondary 3 are intended to be mounted movable about an axis of rotation X and are, moreover, rotatable relative to each other about said axis X.
  • the primary flywheel 2 comprises a radially inner hub 5 supporting the rolling bearing 4, an annular portion 6 extending radially and a cylindrical portion 7 extending axially, on the side opposite the motor, from the outer periphery of the annular portion 6.
  • This hub is provided with orifices 27 for the passage of screws, for fixing the double damping flywheel 1 to the nose of the crankshaft.
  • the hub 5 of the primary flywheel 2 has a shoulder 29 serving to support the inner ring of the rolling bearing 4 and retaining said inner ring towards the motor.
  • the primary flywheel 2 carries, on its outer periphery, a ring gear 10 for driving in rotation of the primary flywheel 2, using a starter.
  • the secondary flywheel 3 has a flat annular surface 13, turned on the opposite side to the primary flywheel 2, forming a bearing surface for a friction lining of a clutch disk, not shown.
  • the secondary flywheel 3 has, close to its outer edge, studs (not shown) and orifices 15 for mounting a clutch cover.
  • the primary flywheels 2 and secondary 3 are coupled in rotation by damping means comprising a transmission member 60 mounted to rotate with the secondary flywheel 3 and provided with two elastic arms 61a, 61b.
  • the elastic arms 61a, 61b are carried by an attachment portion 62 in the form of an annular body provided with orifices allowing the rivets 28 for attachment to the secondary flywheel 3 to pass therethrough.
  • the transmission member is included in a plane perpendicular to the axis of rotation and has an axis of axial symmetry.
  • a bent portion 63 connects the annular fixing body 62 to each elastic arm 61a, 61b.
  • the two resilient arms 61a, 61b are bent around the axis of rotation X from the bent portion 63 to an end zone 64a, 64b. These end zones are free.
  • the elastic arms 61a, 61b comprise a cam surface 20 which is arranged to cooperate with a cam follower 21, carried by the primary flywheel 2.
  • the curvature of the elastic arms and their length are determined according to the desired stiffness for the elastic arms 61a, 61b.
  • the cam followers comprise rollers 26 carried by cylindrical rods 22 fixed to the primary flywheel 2.
  • the rollers 26 are mounted to rotate about cylindrical rods 22 along an axis of rotation parallel to the axis of rotation X.
  • the rollers 26 are held in abutment against the cam surfaces 20 and are arranged to roll against each cam surface 20 during a relative movement between the primary flywheels 2 and secondary 3
  • the rollers 26 are disposed radially outwardly from the respective cam surfaces 20 so as to radially maintain the resilient arms 61a, 61b when subjected to centrifugal force.
  • the rollers 26 are advantageously rotatably mounted on the cylindrical rods 22 by means of rolling bodies such as balls or rollers.
  • Each cam surface 20 is arranged such that, for an angular displacement between the primary flywheel 2 and the secondary flywheel 3, relative to a relative angular position of rest, each roller 26 moves on the cam surface 20 and, in doing so, exerts a bending force on each elastic arm 61a, 61b of the transmission member 60.
  • each elastic arm 61a, 61b exerts on the roller 26 a restoring force which tends to bring back the primary flywheels 2 and secondary 3 to their relative angular position of rest.
  • the elastic arms 61a, 61b of the transmission member are capable of transmitting a driving torque from the primary flywheel 2 to the secondary flywheel 3 (forward direction) and a resistant torque of the secondary flywheel 3 to the primary flywheel 2 (retro direction ).
  • each cam surface 20 has a profile arranged so that, when the transmitted torque increases, the cam follower exerts a bending force on the elastic arm causing a bringing of its end zone 64a, 64b towards the X axis and a relative rotation between the flywheels such as the primary flywheel 2 and secondary 3 deviate from their relative position of rest.
  • the torsional vibrations and the irregularities of torque are dampened by the bending of the elastic arms 61a and 61b of the damping members.
  • the damping operates when a torque is transmitted from the primary flywheel to the secondary flywheel and also when a resistant torque is transmitted from the secondary flywheel 3 to the primary flywheel 2 (retro direction).
  • the torque to be transmitted causes a relative movement between the primary flywheel 2 and the secondary flywheel in opposite directions depending on whether the torque is transmitted in forward direction or retro.
  • the damper comprises friction members arranged to exert a resistant torque between the primary flywheel 2 and the secondary flywheel 3 during their relative movement.
  • the friction members comprise a spring washer, of "Belleville type" 32, a first friction washer 33, and a second friction washer 34 able to generate a hysteresis when the primary and secondary flywheels rotate relative to each other .
  • the damper comprises, for a first relative direction of rotation (A) of the primary flywheel relative to the secondary flywheel, two end-of-stroke devices 50a allowing progressive abutment between the primary and secondary flywheels.
  • the end-of-travel device comprises a deformable element 51a provided with an elastic blade 55a arranged to exert a force opposing the continuation of the relative rotation of the primary and secondary flywheels in the first relative direction of rotation when these elements come in progressive stop.
  • the elastic blade 55a is in the rest state outside the progressive abutment. On the other hand, it is arranged to deform during the progressive abutment between the primary and secondary wheels.
  • the deformable element 51a is mounted on the primary flywheel 2 and the end-of-travel device 50a further comprises a stopper 53a carried by the secondary flywheel 3.
  • This stopper here is a surface formed on a projecting element 37 of the secondary flywheel.
  • the deformable element 51a and the stopper 53a are arranged to bear against each other to produce progressive abutment between the primary and secondary flywheels, in the first relative direction of rotation A.
  • the elastic blade 55a of the deformable element 51a is able to deform and exert an elastic return force, under the action of the forces exerted by the stopper 53a on the deformable element 51a, so as to produce the progressive abutment between the primary flywheels 2 and secondary 3.
  • the elastic restoring force exerted by the elastic blade 55a is able to oppose further relative rotation of the primary and secondary flywheels in the first direction of relative rotation A.
  • the end-of-stroke device is arranged to make more difficult the additional relative rotation of the primary and secondary flywheels in the first direction of relative rotation during the phase of progressive abutment.
  • the deformable element 51a is distant from the stopper 53a before the primary and secondary flywheels reach the phase of progressive abutment.
  • the angular displacement of the primary and secondary flywheels, between the relative angular position of rest, adopted by the damper in the absence of torque to be transmitted, and the beginning of the progressive abutment is approximately 50 °.
  • the end-of-stroke device 50a further comprises a stop element 57a, arranged to limit the deformation of the deformable element 51a in the first relative direction of rotation A.
  • the stop element 57a prevents the continuation of the relative rotation of the primary flywheels 2 and secondary 3 in the first relative direction of rotation and causes them in a phase of integral rotation.
  • phase of progressive abutment here corresponds to a relative rotation of the two flywheels at an angle of about 0.5 °.
  • the stop member 57a is arranged such that, in the non-damping transmission phase, the forces exerted by the stopper 53a on the stop element 57a cause the primary and secondary flywheels to rotate in a fixed rotation.
  • the end-of-stroke device 50a is arranged such that the integral phase of rotation P2 follows the phase of progressive abutment ⁇ .
  • phase of integral rotation the primary flywheels 2 and secondary 3 are in abutment against one another and rotate together, so as to prevent relative rotation between the primary and secondary flywheels, in the first direction of rotation relative A.
  • the phase of integral rotation is a phase of torque transmission without damping. This phase of integral rotation occurs, according to the first direction of relative rotation A, after the phase of progressive abutment. The progressivity of the abutment ends and the stop between the primary and secondary 2 flywheels becomes frank.
  • the damper especially when the relative rotation in the first direction of rotation A is sufficiently prolonged, can pass in these three phases:
  • the stop element 57a has a stop surface arranged on a projecting element 36 for example formed in the mass of the primary flywheel.
  • the deformable element 51a comprises a fastener 56 mounted to rotate with the primary flywheel 2.
  • the primary flywheel comprises a support 38 on which is mounted the fastener 56 of the deformable element 51.
  • This support 38 is formed in the mass of the primary flywheel, here on the projecting element 36.
  • the stop surface 57a is formed on the mounting bracket 36 of the deformable member 51a.
  • the fastener 56 is fixed on the support by fastening elements such as rivets 71.
  • the fastener 56 of the deformable element 51 and the elastic blade 55a are formed in one piece.
  • the elastic blade 55a has a bend 58 for connection with the fastener 56.
  • the elastic blade 55a of the deformable element 51a thus extends in a direction substantially perpendicular to the fastener 56 of the deformable element 51.
  • the end-of-stroke device 50a is arranged so that the deformable element 51 is rigidly clamped between the stopper 53a and the stop element 57a in the rotation phase.
  • solidary primary and secondary flywheels ie when the primary and secondary flywheels are in abutment.
  • it is the elastic blade 55a which is clamped between the stopper 53a and the stop element 57a in this operating phase.
  • the roller is rotatably mounted around the rod 22 and the fastener 56 of the deformable element 51 is arranged around this rod so as to ensure the recovery of the radial forces exerted by the elastic arm 61a or 61b on the roller 26.
  • the fastener 56 is mounted in abutment against the rod 22 so that the fastener contributes to the recovery of the radial forces exerted by the elastic arm on the cam follower.
  • the rod 22 is formed on one of the fasteners 71 of the fastener 56, for example a rivet.
  • the elastic blade 55a of the deformable element 51 is able to deform by bending in a plane orthoradial to the axis of rotation X.
  • the damper 1 further comprises at least one opposite end-of-travel device 50b arranged to allow progressive abutment between the primary and secondary flywheels 2, in a second relative direction of rotation of the primary and secondary flywheels, opposite to the first direction of relative rotation A.
  • the opposite end-of-travel device 50b comprises an opposite deformable element 51b able to deform upon progressive abutment in the second relative direction of rotation B.
  • the opposite end-of-travel device 50b comprises a stop 53b opposite arranged to bear against the opposite deformable element 51b to allow a progressive abutment between the primary and secondary flywheels, in the second direction of relative rotation (B) primary and secondary steering wheels.
  • the deformable element 51b opposite is provided with an opposing elastic blade 55b arranged to exert a force opposing the further relative rotation of the primary and secondary flywheels in the second direction of relative rotation (B) when these elements come into operation. progressive stop.
  • the opposite end-of-travel device 50b comprises an opposite stop element 57b arranged to limit the deformation of the deformable element 51b opposite in the second direction of relative rotation B.
  • the opposite deformable element is formed here in one piece with the deformable element and have a common fastener 56.
  • This part comprises a plane of symmetry passing the axis of the roller 26 and the axis X of the 'damper.
  • the clip 56 is arranged in a plane perpendicular to the axis of rotation. In other words, this part ensures the bidirectional progressive abutment, that is to say in the two directions of relative rotation A and B.
  • the fastener 56 covers, at least partially, the roller 26 of the cam follower.
  • the deformable element 51a and the opposite deformable element 51b are arranged circumferentially on either side of the cam follower 21.
  • the roller 26 of the cam follower 21 is housed partly in a housing 59 formed inside the cam follower. projecting element 36.
  • the roller 26 of the cam follower 21 is housed partly in the housing 59 formed inside the support 38 which extends circumferentially on either side of the cam follower 21.
  • the part on which the deformable element 51a and the opposite deformable element 51b are formed is an arc which has an arcuate shape about the axis of rotation X and has at its ends on the one hand the elastic blade 55a and on the other hand, the opposing elastic blade 55b, and between them, the fastener 56.
  • This arc is formed in a sheet.
  • the ends of the arc are bent to form the elastic blade and the opposing elastic blade.
  • FIGS. 4 to 6 illustrate a second embodiment of the torsion damper. Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, performing the same function, have the same reference numeral increased by 100.
  • the deformable element 151a and the opposite deformable element are formed on separate parts.
  • the fastener 156 of the deformable element 151 is a sliding fastener.
  • This fastener 156 can be mounted by simply sliding on the support 138 formed for example on the upper part of the projecting element 136 of the primary flywheel.
  • the fastener 156 of the deformable element comprises four notches 194 arranged to slide along two rails 195 formed on the support 138 of the primary flywheel.
  • the deformable element has an arcuate shape and the rails extend circumferentially about the axis of rotation X on an angular sector of about 10 degrees.
  • the two rails 195 are formed on the support 138, in the mass of the primary flywheel 102.
  • the deformable element therefore does not require additional fastening means such as rivets.
  • the deformable element comprises at one end an elastic tongue 155 connected to the fastener 156 by a bend 158.
  • the elastic blade 155 is thus formed by this tongue 155.
  • the tongue 155 is bent about 45 degrees with respect to the fastener 156.
  • the deformable element is mounted so that a portion of the tongue, in particular its end zone, is in contact with the projecting element 136, in particular of the stop surface 157, even when the buffer is at a distance from the deformable element 151a.
  • This tongue can be prestressed.
  • the deformable element is mounted so as to allow a deformation of the elbow of the deformable element and a pivoting of the tongue 155 under the action of the forces exerted by the stopper during the progressive abutment.
  • the stopper is supported in this phase against the elbow 158.
  • the tongue then deforms in an ortho radial plane with respect to the axis of rotation X.
  • the progressive abutment can be stopped thanks to the free stop formed by the stop surface 157 formed on the projecting element 136.
  • the abutment is thus obtained when the elbow is deformed sufficiently so that, from its zone end of its elbow, the tongue is in abutment against the stop element 157.
  • the fastener 156 of the deformable element 151 further comprises a tab 196 arranged in a recess 197 of the support so as to stop the return of the deformable element 151 under the action of the restoring force of the elastic blade.
  • the tab 196 abuts in a wall of the recess 197 when the transmitted torque has dropped and the elastic restoring force has brought the deformable element back to its initial position.
  • the deformable element 151 is manufactured by cutting and folding and / or stamping sheet metal, for example of the spring steel type.
  • a similar deformable element similar to this deformable element can be similarly implemented on the other side of the cam follower to ensure progressive abutment in the opposite direction B.
  • the deformable elements and the supports are thus arranged symmetrically with respect to a plane passing through the axis X of the damper and the axis of the roller 126.
  • Figure 7 illustrates a third embodiment of the torsion damper. Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, performing the same function, have the same reference number increased by 200.
  • the deformable element 251a and the opposite deformable element are formed on separate parts.
  • the cam follower 221 is circumferentially disposed between the deformable element and the opposite deformable element, not shown.
  • the fastener 256 of the deformable element is fixed on the primary flywheel 202 by means of a fastening element such as a rivet 271.
  • the deformable element is a corrugated sheet 251a and the elastic blade is formed by laces 272 arranged to be closer to each other under the action of the forces exerted by the bumper on these laces.
  • the corrugated sheet is arranged so that the stop comes to bear against the opposite lace 272a to the attachment 256 during the progressive abutment.
  • the corrugated sheet 251a is able to deform by bending in a portion of a cylinder around the axis of rotation X.
  • the corrugated plate 251a has a first flat end on which the fastener 256 is formed.
  • the corrugated sheet has a second flat end 273 and the stopper is arranged to pass over the second flat end before bearing against the lace 272a during progressive abutment.
  • the end-of-travel device comprises a stop element 257 formed in the mass of the primary flywheel.
  • the stop member is formed on a protruding member 236, here the end 257 of a tooth 236 extending circumferentially about the X axis.
  • the deformable element is inserted in a space radially separating the tooth 236 from the cylindrical portion 207 of the primary flywheel 202.
  • the compression of the deformable element is thus guided circumferentially by the cylindrical portion of the primary flywheel 207 and by the tooth 236.
  • the stopper is arranged so as to be able to bear against the corrugated plate during the progressive abutment and then directly against the stop element 257 during the solidarity rotation of the primary and secondary flywheels.
  • the torque passes through the deformable element 251a only during the phase of progressive abutment.
  • a similar deformable element similar to this deformable element can be similarly implemented on the other side of the cam follower to provide progressive abutment in the opposite direction B.
  • the deformable elements and the supports can be arranged symmetrical with respect to a plane passing through the axis X of the damper and the axis of the roller 226.
  • FIGS 8 and 9 illustrate a fourth embodiment of the torsion damper. To facilitate understanding, the secondary flywheel, on which is mounted the transmission member, is not shown.
  • the elastic arm 361 of the transmission member is partially shown to leave visible the deformable element 351.
  • the deformable element 351a and the opposite deformable element 351b are formed on the same part 351 and have a common fastener 356.
  • This part is formed in a sheet and is pressed against the annular portion 306 of the primary flywheel, perpendicular to the axis of rotation of the shock absorber.
  • the support 338 of the deformable element is thus formed by a portion of the annular portion 306 of the primary flywheel 302.
  • the fastener 356 is riveted to the primary flywheel with three rivets 371.
  • the elastic finger 355a is arranged to be biased in the first direction of relative rotation A and the opposite elastic finger is arranged to be biased in the opposite direction B.
  • Each finger 355a, 355b has a bend 358 connecting with the fastener 356.
  • Each elbow 358 is arranged to deform upon progressive abutment in the first direction of relative rotation A or in the opposite direction B, respectively when the stopper and the opposite stop bears against the finger or the opposite finger.
  • the fastener 356 is attached to the primary flywheel 302 radially inside the cam follower.
  • the two fingers 355a and 355b extend substantially radially, circumferentially on either side of the roller 326.
  • the bumper and the opposite bumper are carried by the secondary flywheel. They are arranged to respectively bear against a free end zone of the finger 355a and a free end zone of the opposite finger 355b.
  • Each roller 326 is housed in a housing formed in a projecting element
  • This protruding element 336 respectively comprises, circumferentially on either side of the cam follower, a stop member 357a and an opposite stop member 357b on which the finger 355a and the opposite finger 355b respectively can abut.
  • These stop elements are stop surfaces extending substantially radially and perpendicularly to the X axis.
  • Each finger comprises, on its end zone, a shock absorber 375a, 375b, arranged to absorb the shocks between the deformable element 351a, 351b and the bumper when the deformable element 351a, 351b and the bumper come into abutment. against each other.
  • a shock absorber 375a, 375b arranged to absorb the shocks between the deformable element 351a, 351b and the bumper when the deformable element 351a, 351b and the bumper come into abutment. against each other.
  • the noise is limited during the contact between the deformable element 351a, 351b and the buffer at the beginning of the progressive abutment.
  • the shock absorbers are also provided to absorb shocks respectively between the finger 355a and the stop member 357a and between the opposite finger 355b and the opposing stop member 357b.
  • shock absorbers 375a and 375b are arranged to deform during the progressive abutment of the primary and secondary flywheels. This allows to generate an additional stiffness of end of race.
  • the shock absorbers 375a 375b are made of deformable material, such as elastomer, for example rubber.
  • each shock absorber could be overmolded on the deformable element 351 and / or on the bumpers.
  • each shock absorber is an insert fitted on the free end area of each finger 355a 355b.
  • the same shock absorber can limit noises and shocks both at the beginning of the progressive abutment during the contact between the deformable element and the bumper, and also at the end of progressive abutment, when the finger leans against the stop element.
  • shock absorber is arranged to rub against the primary flywheel so as to provide a limit hysteresis.
  • a friction zone 398 is formed radially outside the annular portion 306 of the primary flywheel 302. This friction zone may for example be formed on a shoulder connecting the annular portion 306. of the primary flywheel and the cylindrical portion 307 of the primary flywheel. The friction zone is located on the angular sector traversed by the stopper during the progressive abutment. In order for the movement of the fingers 355a and 355b to generate friction, the deformable element must have been mounted with sufficient axial prestressing to axially press the end of the finger against the friction zone 398.
  • the deformable element 351 comprises a plane of symmetry passing through the axis of the roller 326 and the axis of rotation X.
  • Fig. 10 illustrates a fifth embodiment of the torsion damper.
  • the deformable element is mounted on the secondary flywheel 403.
  • the primary flywheel is not shown and the transmission member is in dotted lines.
  • the deformable element 451 could also be mounted on the primary flywheel.
  • the deformable element and the deformable element are formed in one piece (451) and comprise a common elastic blade 455.
  • the attachment of the deformable element is mounted on the secondary flywheel 403. It comprises two loops 456a and 456b each mounted around a support, here two elements projecting the secondary flywheel shaped pads 438a and 438b. Thus, no additional fastener is needed.
  • the resilient blade 455 extends between the two mounting loops. It comprises a lace 472 capable of flexing during progressive abutment.
  • the deformable element 451 is mounted around the two pads 436a and 436b so that the blade 455 is maintained prestressed between the two pads. In other words, the elastic blade is compressed inside the two studs 436a and 436b.
  • the end-of-stroke device is arranged so that at least one bumper (not shown) bears against the fastener and circumferentially pushes the fastener to deform the blade of the deformable element during progressive abutment.
  • a clearance J is provided between the loop ensuring the progressive abutment and the stud, on the side of the stud opposite to the blade, to allow deformation of the blade and a closer approximation of the loops 436a and 436b during the deformation deformable element 451.
  • the stud comprises a stop element 457a blocking the movement of the loop and thus ending the progressive abutment in the first direction of relative rotation A.
  • the stop member 457a is a stop surface also formed on a protruding element of the secondary flywheel, the pad 436a, on the opposite side to the blade 455.
  • the stop element 457 is formed on the support 438 of the deformable element 451.
  • the progressive abutment in the opposite direction is provided by the same deformable element 451.
  • the operation is the same on for the stud opposite 436b and the opposite loop 456b.
  • the loop 456a or 456b is respectively tightened between the bumper and the pad 436a or between the opposite bumper and the pad 436b.
  • Figure 11 illustrates a sixth embodiment of the torsion damper close to the fourth.
  • the primary flywheel is not shown and the transmission member is in dashed lines.
  • the deformable element could also be mounted on the primary flywheel.
  • the blade 555 of the deformable element 551 here comprises a plurality of laces 572 arranged to approach each other during progressive abutment.
  • FIG. 12 illustrates the 3 phases of operation of a double damping flywheel in the forward direction according to any one of the preceding embodiments:
  • PI relative rotation of the two flywheels with damping of the elastic arm (s) of the transmission member
  • ⁇ progressive abutment with deformation of the deformable element

Abstract

The invention relates to a damper, in particular a torsion damper, especially for a motor vehicle clutch, comprising: - a first part (2) and a second part (3) that can rotate relative to each other about an axis of rotation (X); - at least one transmission member (60) that is deformable and can transmit torque between the two parts in a damped transmission phase in which the first and second parts rotate relative to each other about the axis of rotation (X), the damper being characterized in that it comprises an end stop (50a) for at least a first direction of relative rotation between the first and second parts, said end stop (50a) allowing the first and second parts to gradually abut against each other and being provided with a deformable part (51a) that includes a leaf spring.

Description

Amortisseur de torsion, notamment pour un embrayage d'un véhicule automobile  Torsion damper, in particular for a clutch of a motor vehicle
L'invention se rapporte à un amortisseur de torsion, notamment pour un embrayage d'un véhicule automobile. The invention relates to a torsion damper, in particular for a clutch of a motor vehicle.
Etat de la technique Les moyens élastiques d'amortissement équipant généralement les amortisseurs de torsion sont des ressorts hélicoïdaux, à effet circonférentiel, dont les extrémités viennent, d'une part, en appui contre des appuis solidaires des éléments d'entrée et, d'autre part, en appui contre des appuis solidaires des éléments de sortie. Ainsi, toute rotation d'un desdits éléments par rapport à l'autre provoque une compression des ressorts de l'amortisseur dans un sens ou dans l'autre et ladite compression exerce une force de rappel apte à rappeler lesdits éléments vers une position angulaire relative de repos. Les ressorts hélicoïdaux peuvent être droits ou cintrés. State of the art The elastic damping means generally fitted to the torsion dampers are coil springs with a circumferential effect, the ends of which, on the one hand, bear against integral supports of the input elements and, on the other hand, on the other hand, in support against solidarity support of the output elements. Thus, any rotation of one of said elements relative to the other causes a compression of the springs of the damper in one direction or the other and said compression exerts a restoring force able to return said elements to a relative angular position. rest. The coil springs can be straight or bent.
On connaît aussi le document FR3008152 qui décrit un double volant amortisseur pourvu de bras élastiques pour transmettre un couple entre un premier élément et un second élément (volants d'inertie primaire et secondaire). Also known is FR3008152 which describes a double damping flywheel provided with elastic arms for transmitting a torque between a first element and a second element (flywheels of primary and secondary inertia).
L'invention vise à améliorer les amortisseurs de torsion ci-dessus, notamment en atténuant la bruyance lors de la mise en butée des premier et second éléments ou éléments d'entrée et de sortie. The invention aims to improve the torsion dampers above, in particular by reducing the noise during the abutment of the first and second elements or input and output elements.
Objet de l'invention L'invention propose ainsi un amortisseur, notamment un amortisseur de torsion, notamment pour un embrayage d' automobile, comprenant : OBJECT OF THE INVENTION The invention thus proposes a shock absorber, in particular a torsion damper, in particular for an automobile clutch, comprising:
- un premier et un second élément mobiles en rotation l'un par rapport à l'autre autour d'un axe de rotation (X); a first and a second element movable in rotation relative to one another about an axis of rotation (X);
- au moins un organe de transmission capable, dans une phase de transmission avec amortissement dans laquelle les premier et second éléments tournent l'un par rapport à l'autre selon l'axe de rotation X, de se déformer et de transmettre un couple entre ces deux éléments, l'amortisseur étant caractérisé en ce qu'il comporte, pour au moins un premier sens de rotation relative des premier et second éléments, un dispositif de fin de course permettant une mise en butée progressive entre les premier et second éléments, le dispositif de fin de course comportant un élément déformable doté d'une lame élastique agencée pour exercer un effort s 'opposant à la poursuite de la rotation relative des premier et second éléments dans le premier sens de rotation relative lorsque ces éléments viennent en butée progressive. at least one transmission member capable, in a damping transmission phase in which the first and second elements rotate relative to one another along the axis of rotation X, of deforming and transmitting a torque between these two elements, the damper being characterized in that it comprises, for at least a first direction of relative rotation of the first and second elements, an end-of-stroke device allowing progressive abutment between the first and second elements, the end device stroke comprising a deformable element provided with an elastic blade arranged to exert a force opposing the further relative rotation of the first and second elements in the first direction of relative rotation when these elements come into progressive abutment.
Limiter le débattement angulaire grâce à un tel dispositif de fin de course permet à la fois de protéger l'organe de transmission et de limiter la bruyance en cas de transmission d'un surcouple, résultant par exemple de conditions d'utilisation limites ou d'un Limiting the angular movement by means of such a limit device makes it possible at the same time to protect the transmission member and to limit the noise in the event of transmission of an overtorque, resulting, for example, from limited use conditions or from a
dysfonctionnement du groupe motopropulseur. En se déformant, l'élément déformable absorbe, sans bruit et sans choc, une grande partie de ce surcouple. La fin de course se fait ainsi de façon progressive powertrain malfunction. By deforming, the deformable element absorbs, without noise and without shock, a large part of this overtorque. The end of the race is thus progressively
De plus, lorsqu'un tel amortisseur comporte une butée franche, il est facile d'interposer l'élément déformable à lame élastique entre les deux parties complémentaires d'une butée franche d'amortisseur. In addition, when such a damper comprises a free stop, it is easy to interpose the deformable elastic blade element between the two complementary parts of a buffer abutment.
Un tel amortisseur peut présenter une ou plusieurs des caractéristiques suivantes : Such a damper may have one or more of the following characteristics:
La lame élastique du dispositif de fin de course est distincte de l'organe de transmission. The elastic blade of the end-of-stroke device is distinct from the transmission member.
La lame élastique est agencée pour se déformer pendant la mise en butée progressive entre les premier et second éléments.  The elastic blade is arranged to deform during progressive abutment between the first and second elements.
Selon un mode de réalisation, la lame élastique est à l'état de repos en dehors de la mise en butée progressive.  According to one embodiment, the elastic blade is in the rest state outside the progressive abutment.
Selon un autre mode de réalisation, la lame élastique est précontrainte en dehors de la mise en butée progressive.  According to another embodiment, the elastic blade is prestressed outside the progressive abutment.
l'élément déformable comporte une attache montée sur un support de l'un des premier et second éléments.  the deformable element comprises a fastener mounted on a support of one of the first and second elements.
le dispositif de fin de course comporte en outre un butoir porté par l'autre des premier et second éléments, l'élément déformable et le butoir étant agencés de façon à venir en appui l'un contre l'autre lors de la mise en butée progressive entre les premier et second éléments, dans le premier sens de rotation relative the end-of-stroke device further comprises a bumper carried by the other of the first and second elements, the deformable element and the stopper being arranged so as to bear against each other during the abutment progressive between the first and second elements, in the first direction of relative rotation
A. La lame élastique de l'élément déformable est apte à se déformer et exercer un effort de rappel élastique, sous l'action des efforts exercés par le butoir sur l'élément déformable, de manière à produire la mise en butée progressive entre les premier et second éléments. AT. The elastic blade of the deformable element is able to deform and exert an elastic return force, under the action of the forces exerted by the stopper on the deformable element, so as to produce progressive abutment between the first and second elements.
Lors de la phase de mise en butée progressive, la force de rappel élastique exercée par la lame élastique est apte à s'opposer à une rotation relative supplémentaire des premier et second éléments dans le premier sens de rotation relative.  During the phase of progressive abutment, the elastic restoring force exerted by the elastic blade is able to oppose additional relative rotation of the first and second elements in the first direction of relative rotation.
L'élément déformable est distant du butoir avant que les premier et second éléments n'atteignent la phase de mise en butée progressive.  The deformable element is distant from the buffer before the first and second elements reach the phase of progressive abutment.
Le dispositif de fin de course est agencé de manière à rendre plus difficile la rotation relative supplémentaire des premier et second éléments dans le premier sens de rotation relative lors de la phase de mise en butée progressive. The end-of-stroke device is arranged to make it more difficult for the additional relative rotation of the first and second elements in the first direction of relative rotation during the phase of progressive abutment.
Le débattement angulaire des premier et second éléments, entre une première position angulaire relative de repos, adoptée par l'amortisseur en l'absence de couple à transmettre, et le début de la mise en butée progressive, est supérieur à 20°, notamment supérieur à 45°, par exemple supérieur à 60°. The angular displacement of the first and second elements, between a first relative angular position of rest, adopted by the damper in the absence of torque to be transmitted, and the beginning of the progressive abutment, is greater than 20 °, especially higher at 45 °, for example greater than 60 °.
La phase de mise en butée progressive peut correspondre à une rotation relative d'un angle minimal de 0,5°, notamment 1 °.  The phase of progressive abutment can correspond to a relative rotation of a minimum angle of 0.5 °, in particular 1 °.
La phase de mise en butée progressive peut correspondre à une rotation relative d'un angle maximal de 5°, par exemple 3°, notamment 1 °.  The phase of progressive abutment can correspond to a relative rotation of a maximum angle of 5 °, for example 3 °, in particular 1 °.
Dans un exemple de mise en œuvre de l'invention, le dispositif de fin de course est agencé de sorte qu'une phase de rotation solidaire fait suite à la phase de mise en butée progressive. In an exemplary implementation of the invention, the end-of-stroke device is arranged such that a phase of integral rotation follows the phase of progressive abutment.
Dans la phase de mise en rotation solidaire, les premier et second éléments sont en butée franche l'un contre l'autre et tournent ensemble, de manière à empêcher toute rotation relative entre les premier et second éléments, dans le premier sens de rotation relative.  In the phase of integral rotation, the first and second elements abut against each other and rotate together, so as to prevent relative rotation between the first and second elements, in the first direction of relative rotation .
La phase de mise en rotation solidaire est une phase de transmission de couple sans amortissement.  The phase of integral rotation is a phase of torque transmission without damping.
La phase de rotation solidaire se produit, selon le premier sens de rotation relative, après la phase de mise en butée progressive. La progressivité de la butée prend fin et la butée entre les premier et second éléments devient franche. Autrement dit, dans la phase de transmission sans amortissement, le dispositif de fin de course cesse de produire la mise en butée progressive et assure la butée franche. Ainsi, lorsque la rotation relative dans le premier sens de rotation relative se prolonge suffisamment, l'amortisseur peut passer dans ces trois phases : The rotational phase of solidarity occurs, in the first direction of relative rotation, after the phase of progressive abutment. The progressivity of the abutment ends and the stop between the first and second elements becomes frank. In other words, in the transmission phase without damping, the end-of-stroke device ceases to produce the progressive abutment and ensures the end stop. Thus, when the relative rotation in the first direction of relative rotation is sufficiently prolonged, the damper can pass in these three phases:
la phase de transmission avec amortissement dans laquelle une rotation relative entre les premier et second éléments se produit sans résistance de l'élément déformable,  the damping transmission phase in which a relative rotation between the first and second elements occurs without resistance of the deformable element,
puis la phase de mise en butée progressive dans laquelle une rotation relative entre les premier et second éléments se produit encore mais avec une résistance due à l'élément déformable,  then the phase of progressive abutment in which a relative rotation between the first and second elements still occurs but with a resistance due to the deformable element,
puis la phase de transmission sans amortissement dans laquelle les premier et second éléments tournent solidairement.  then the non-damping transmission phase in which the first and second elements rotate together.
Le dispositif de fin de course comporte un élément d'arrêt agencé pour mettre fin à la déformation de l'élément déformable dans le premier sens de rotation relative et entraîner les premier et second éléments dans une rotation solidaire. L'élément d'arrêt est agencé de telle sorte que, dans la phase de transmission sans amortissement, le couple est transmis entre le butoir et l'élément d'arrêt pour entraîner les premier et second éléments dans une rotation solidaire. - L'élément d'arrêt est agencé sur un élément en saillie par exemple formé dans la masse de l'un des premier et second éléments.  The end-of-travel device comprises a stop element arranged to terminate the deformation of the deformable element in the first relative direction of rotation and to cause the first and second elements in a fixed rotation. The stop member is arranged such that, in the non-damping transmission phase, the torque is transmitted between the bumper and the stop member to drive the first and second members in integral rotation. - The stop element is arranged on a projecting element for example formed in the mass of one of the first and second elements.
Ledit un des premier et second élément comporte un support sur lequel est montée l'attache de l'élément déformable.  Said one of the first and second elements comprises a support on which is mounted the attachment of the deformable element.
Le support est formé sur un élément en saillie par exemple formé dans la masse de l'un des premier et second éléments.  The support is formed on a projecting element for example formed in the mass of one of the first and second elements.
L'attache est fixée sur le support par des éléments de fixations tels que des vis ou des rivets.  The fastener is secured to the support by fasteners such as screws or rivets.
L'élément d'arrêt présente une surface d'arrêt formée sur le support de l'élément déformable. Autrement dit, l'élément d'arrêt est formé sur le support. - L'attache de l'élément déformable et la lame élastique sont formés d'une seule pièce.  The stop member has a stop surface formed on the support of the deformable member. In other words, the stop member is formed on the support. - The attachment of the deformable element and the elastic blade are formed in one piece.
L'amortisseur comporte en outre au moins un dispositif de fin de course opposé agencé pour permettre une mise en butée progressive entre les premier et second éléments, dans un second sens de rotation relative (B) des premier et second éléments, opposé au premier sens de rotation relative. The damper further comprises at least one opposite end-of-travel device arranged to allow progressive abutment between the first and second and second elements, in a second direction of relative rotation (B) of the first and second elements, opposite to the first direction of relative rotation.
Si on le souhaite, le dispositif de fin de course opposé comporte un élément déformable opposé agencée pour se déformer dans le second sens de rotation relative.  If desired, the opposite end-of-travel device comprises an opposite deformable element arranged to deform in the second relative direction of rotation.
Selon un autre mode de réalisation, l'élément déformable et l'élément déformable opposé sont formés d'une seule pièce. Autrement dit, cette pièce assure la mise en butée progressive de façon bidirectionnelle.  According to another embodiment, the deformable element and the opposite deformable element are formed in one piece. In other words, this part ensures the progressive abutment bidirectionally.
Le dispositif de fin de course opposé comporte un butoir opposé agencé pour venir en appui contre l'élément déformable opposé pour permettre une mise en butée progressive entre les premier et second éléments, dans le second sens de rotation relative (B) des premier et second éléments. The opposite end-of-travel device comprises an opposite bumper arranged to abut against the opposite deformable element to allow progressive abutment between the first and second elements, in the second direction of relative rotation (B) of the first and second elements.
L'élément déformable opposé est doté d'une lame élastique opposée agencée pour exercer un effort s' opposant à la poursuite de la rotation relative des premier et second éléments dans le second sens de rotation relative (B) lorsque ces éléments viennent en butée progressive.  The opposite deformable element is provided with an opposing elastic blade arranged to exert a force opposing the continuation of the relative rotation of the first and second elements in the second relative direction of rotation (B) when these elements come into progressive abutment. .
Le dispositif de fin de course opposé comporte un élément d'arrêt opposé agencé pour limiter la déformation de l'élément déformable opposé dans le second sens de rotation relative.  The opposite end-of-travel device comprises an opposite stop element arranged to limit the deformation of the opposite deformable element in the second relative direction of rotation.
Selon un autre mode de réalisation le butoir vient en appui contre l'attache et pousse circonférentiellement l'attache pour déformer la lame de l'élément déformable lors de la mise en butée progressive.  According to another embodiment the bumper bears against the fastener and circumferentially pushes the fastener to deform the blade of the deformable element during the progressive abutment.
Si on le souhaite, le dispositif de fin de course comporte un absorbeur de choc agencé entre l'élément déformable et le butoir pour absorber le choc entre l'élément déformable et le butoir lorsque l'élément déformable et le butoir viennent en appui l'un contre l'autre. Ainsi, il n'y a presque aucun bruit lors du contact entre l'élément déformable et le butoir.  If desired, the end-of-stroke device comprises a shock absorber arranged between the deformable element and the stopper to absorb the shock between the deformable element and the stopper when the deformable element and the stopper come into abutment. one against the other. Thus, there is almost no noise during the contact between the deformable element and the bumper.
L' absorbeur de choc est agencé pour se déformer lors de la mise en butée progressive des premier et second éléments. Cela permet ainsi de générer une raideur supplémentaire de fin de course.  The shock absorber is arranged to deform during progressive abutment of the first and second elements. This allows to generate an additional stiffness of end of race.
L' absorbeur de choc est réalisé en matériau déformable, tel que de l'élastomère, par exemple du caoutchouc.  The shock absorber is made of deformable material, such as elastomer, for example rubber.
L'absorbeur de choc est surmoulé sur l'élément déformable ou sur le butoir. L' absorbeur de choc est une pièce rapportée emmanchée sur l'élément déformable ou sur le butoir. The shock absorber is overmoulded on the deformable element or on the bumper. The shock absorber is an insert fitted on the deformable element or on the bumper.
L' absorbeur de choc est agencé pour frotter contre l'un des premier et second éléments sur lequel est monté l'élément déformable de manière à assurer une hystérésis de fin de course.  The shock absorber is arranged to rub against one of the first and second elements on which the deformable element is mounted so as to provide end of stroke hysteresis.
Dans un mode de réalisation de l'invention, le dispositif de fin de course est agencé de telle sorte que le butoir vienne s'appuyer directement contre l'élément d'arrêt dans la phase de rotation solidaire des premier et second éléments. Ainsi, le couple passe par l'élément déformable uniquement lors de la phase de mise en butée progressive.  In one embodiment of the invention, the end-of-stroke device is arranged in such a way that the stopper comes to bear directly against the stop element in the phase of rotation integral with the first and second elements. Thus, the torque passes through the deformable element only during the phase of progressive abutment.
Dans un autre mode de réalisation de l'invention, le dispositif de fin de course est agencé pour que l'élément déformable soit serré entre le butoir et l'élément d'arrêt dans la phase de rotation solidaire des premier et second éléments, autrement dit lorsque les premier et second éléments sont en butée franche. Selon un mode de réalisation, la lame élastique est agencée pour être maintenue serrée entre le butoir et l'élément d'arrêt lorsque les premier et second éléments sont en butée franche  In another embodiment of the invention, the end-of-stroke device is arranged so that the deformable element is clamped between the stopper and the stop element in the phase of rotation integral with the first and second elements, otherwise said when the first and second elements are in abutment. According to one embodiment, the elastic blade is arranged to be held tight between the stopper and the stop element when the first and second elements are in abutment
Selon un autre mode de réalisation, l'attache est agencée pour être maintenue serrée entre le butoir et l'élément d'arrêt dans la première position de butée finale des premier et second éléments lorsque les premier et second éléments sont en butée franche.  According to another embodiment, the fastener is arranged to be held tight between the stopper and the stop element in the first final stop position of the first and second elements when the first and second elements are in abutment.
L'attache de l'élément déformable est monté sur l'un des premier et second éléments autour d'un plot , l'élément déformable comportant au moins une boucle de montage, chaque boucle de montage étant montée autour du/des plot(s). Ainsi, aucun élément de fixation additionnel n'est nécessaire.  The attachment of the deformable element is mounted on one of the first and second elements around a pad, the deformable element comprising at least one mounting loop, each mounting loop being mounted around the pad (s). ). Thus, no additional fastener is needed.
L'attache de l'élément déformable comporte deux boucles de montage montées autour de deux plots.  The attachment of the deformable element comprises two mounting loops mounted around two pads.
La lame élastique s'étend entre les deux boucles de montage  The elastic blade extends between the two mounting loops
L'élément déformable est monté autour des deux plots de telle sorte que la lame soit maintenue précontrainte entre les deux plots. The deformable element is mounted around the two studs so that the blade is maintained prestressed between the two studs.
Le dispositif de fin de course est agencé de sorte que le butoir vienne en appui contre la boucle pour permettre la mise en butée progressive entre les premier et second éléments.  The end-of-stroke device is arranged so that the bumper bears against the loop to allow progressive abutment between the first and second elements.
La surface d'arrêt est formée sur ce plot. Un jeu est ménagé entre la boucle et la surface d'arrêt formée sur le plot pour permettre un déplacement de la boucle lors de la déformation de l'élément déformable. The stop surface is formed on this pad. A game is formed between the loop and the stop surface formed on the pad to allow movement of the loop during the deformation of the deformable element.
L'organe de transmission comporte au moins un bras élastique capable de fléchir et transmettre un couple entre les premier et second éléments, la flexion du bras élastique étant, dans la première phase de transmission, accompagnée d'une rotation relative entre le premier et le second élément selon l'axe de rotation X.  The transmission member comprises at least one elastic arm capable of flexing and transmitting a torque between the first and second elements, the bending of the elastic arm being, in the first transmission phase, accompanied by a relative rotation between the first and the second. second element according to the axis of rotation X.
Le bras élastique et la lame de l'élément déformable sont disposés en parallèle. - La mise en butée progressive est déclenchée angulairement, lorsque les premier et second éléments atteignent une position angulaire relative prédéterminée. The elastic arm and the blade of the deformable element are arranged in parallel. - The progressive abutment is triggered angularly, when the first and second elements reach a predetermined relative angular position.
L'organe de transmission comporte une pluralité de bras élastiques disposés de préférence de façon symétrique par rapport à l'axe de rotation. The transmission member comprises a plurality of resilient arms preferably arranged symmetrically with respect to the axis of rotation.
Selon un autre mode de réalisation, l'amortisseur comporte deux organes de transmission situés sur un même plan, les organes de transmission étant disposés de préférence de façon symétrique par rapport à l'axe de rotation. According to another embodiment, the damper comprises two transmission members located on the same plane, the transmission members being preferably arranged symmetrically with respect to the axis of rotation.
L'organe ou les organes de transmission est(sont) porté(s) par l'un des premier et second éléments The transmission member (s) is (are) carried by one of the first and second elements
L'organe ou les organes de transmission est(sont) porté(s) par l'un des premier et second éléments et chaque bras élastique est pourvu d'une surface de came coopérant avec un suiveur de came porté par l'autre desdits premier et second éléments.  The transmission member or members is (are) carried by one of the first and second members and each elastic arm is provided with a camming surface cooperating with a cam follower carried by the other of said first and second elements.
La surface de came est agencée sur une portion recourbée du bras élastique autour de l'axe de rotation X.  The cam surface is arranged on a bent portion of the elastic arm about the axis of rotation X.
- La surface de came est agencée de sorte que, dans une position angulaire relative des premier et second éléments décalée angulairement par rapport à une position angulaire relative de repos, le suiveur de came exerce un effort de flexion sur le bras élastique produisant une force de réaction du bras élastique apte à rappeler lesdits premier et second éléments vers ladite position angulaire de repos. The cam surface is arranged such that, in a relative angular position of the first and second elements angularly offset relative to a relative angular position of rest, the cam follower exerts a bending force on the elastic arm producing a force of reaction of the resilient arm adapted to return said first and second elements to said angular position of rest.
Le bras élastique de l'organe de transmission est apte à se déformer en fléchissant dans un plan perpendiculaire à axe de rotation.  The elastic arm of the transmission member is adapted to deform by bending in a plane perpendicular to the axis of rotation.
Le suiveur de came comporte un galet agencé pour rouler sur la surface de came du bras élastique. Le galet est monté mobile en rotation par l'intermédiaire d'un palier à roulements, à billes ou à aiguilles. The cam follower comprises a roller arranged to roll on the cam surface of the elastic arm. The roller is rotatably mounted by means of a rolling bearing, ball or needle.
En variante, le galet peut être agencé entre les premier et second éléments de façon à rouler à la fois sur la surface de came du bras élastique porté par l'un des premier et second éléments et une surface de came portée par l'autre des premier et second éléments.  Alternatively, the roller may be arranged between the first and second members to roll both on the cam surface of the resilient arm carried by one of the first and second members and a cam surface carried by the other member. first and second elements.
Le bras élastique comporte une zone d'extrémité libre se déplaçant avec une composante radiale lorsque le bras élastique fléchit.  The elastic arm has a free end zone moving with a radial component when the elastic arm flexes.
En variante, l'organe de transmission est un ressort courbe agencé circonférentiellement autour de l'axe de rotation X.  In a variant, the transmission member is a curved spring arranged circumferentially around the axis of rotation X.
Si on le souhaite, l'amortisseur comporte une pluralité de ressorts courbes agencés circonférentiellement autour de l'axe de rotation X.  If desired, the damper comprises a plurality of curved springs arranged circumferentially around the axis of rotation X.
Le suiveur de came est logé dans un logement bordé, au moins en partie, par le support de l'élément déformable.  The cam follower is housed in a housing lined, at least in part, by the support of the deformable element.
L'élément déformable et l'élément déformable opposé sont disposés, circonférentiellement, de part et d'autre du suiveur de came. The deformable element and the opposite deformable element are arranged, circumferentially, on either side of the cam follower.
La lame élastique et la lame élastique opposée sont disposées, circonférentiellement, de part et d'autre du suiveur de came.  The elastic blade and the opposite elastic blade are arranged, circumferentially, on either side of the cam follower.
Le suiveur de came comporte un galet monté mobile en rotation autour d'une tige et l'attache de l'élément déformable est agencée autour de cette tige de façon à assurer la reprise des efforts radiaux exercés par le bras élastique sur le galet.  The cam follower comprises a roller mounted to rotate about a rod and the fastener of the deformable element is arranged around this rod so as to ensure the recovery of the radial forces exerted by the elastic arm on the roller.
La tige est formée sur l'un des éléments de fixation de l'attache.  The rod is formed on one of the fastening elements of the fastener.
La lame élastique de l'élément déformable est apte à se déformer en fléchissant dans un plan orthoradial à l'axe de rotation X. The elastic blade of the deformable element is able to deform by bending in a plane orthoradial to the axis of rotation X.
l'élément déformable est formé dans une tôle, the deformable element is formed in a sheet,
l'élément déformable et l'élément déformable opposé comportent une attache commune. the deformable element and the opposite deformable element comprise a common fastener.
l'attache du dispositif de fin de course bidirectionnel est disposée dans un plan perpendiculairement à l'axe de rotation. the attachment of the bidirectional limit device is disposed in a plane perpendicular to the axis of rotation.
l'attache du dispositif de fin de course bidirectionnel recouvre, au moins partiellement, le suiveur de came. La lame élastique est reliée à l'attache par une portion coudée de sorte que la lame élastique de l'élément déformable s'étende dans une direction sensiblement perpendiculaire à l'attache de l'élément déformable. the attachment of the bi-directional limit device covers, at least partially, the cam follower. The elastic blade is connected to the fastener by a bent portion so that the elastic blade of the deformable element extends in a direction substantially perpendicular to the attachment of the deformable element.
L'élément déformable du dispositif de fin de course bidirectionnel présente une forme arquée autour de l'axe de rotation X et comporte à ses extrémités la lame élastique et la lame élastique opposée, et entre celles-ci, l'attache.  The deformable element of the bi-directional end-of-stroke device has an arcuate shape about the axis of rotation X and has at its ends the elastic blade and the opposite resilient blade, and between them, the fastener.
Selon un autre mode de réalisation de l'invention, l'élément déformable et l'élément déformable opposé sont formés sur des pièces distinctes.  According to another embodiment of the invention, the deformable element and the opposite deformable element are formed on separate parts.
Si on le souhaite, l'attache est montée sur son support avec une possibilité de mouvement circonférentiel et la déformation de l'élément déformable pendant la mise en butée progressive est accompagnée d'un déplacement circonférentiel de l'attache.  If desired, the fastener is mounted on its support with a possibility of circumferential movement and the deformation of the deformable element during the progressive abutment is accompanied by a circumferential movement of the fastener.
Par exemple, l'attache de l'élément déformable est une attache coulissante. L'attache est montée par simple coulissement sur le support.  For example, the attachment of the deformable element is a sliding fastener. The clip is mounted by simply sliding on the support.
- L'attache de l'élément déformable comporte des encoches agencées pour - The attachment of the deformable element comprises notches arranged for
coulisser le long de rails formés sur le support.  slide along rails formed on the support.
L'élément déformable a une forme arquée et les rails s'étendent circonférentiellement autour de l'axe de rotation X sur un secteur angulaire compris entre 10 et 30 degrés.  The deformable element has an arcuate shape and the rails extend circumferentially around the axis of rotation X on an angular sector between 10 and 30 degrees.
- Les rails sont formés dans la masse du support. - The rails are formed in the mass of the support.
L'élément déformable comporte à une extrémité une languette, formant lame élastique, la languette comportant un coude de liaison avec l'attache  The deformable element comprises at one end a tongue forming an elastic blade, the tongue having a connecting elbow with the fastener
La languette est précontrainte en dehors de la mise en butée progressive L'élément déformable est monté de sorte qu'une portion de la languette, notamment sa zone d'extrémité, soit au contact du support, notamment de la surface d'arrêt, lorsque le butoir est à distance de l'élément déformable.  The tongue is preloaded outside the progressive abutment The deformable element is mounted so that a portion of the tongue, in particular its end zone, is in contact with the support, in particular the stop surface, when the buffer is at a distance from the deformable element.
L'élément déformable est monté de façon à autoriser une déformation du coude de l'élément déformable et un pivotement de la languette sous l'action des efforts exercés par le butoir lors de la mise en butée progressive.  The deformable element is mounted so as to allow deformation of the elbow of the deformable element and a pivoting of the tongue under the action of the forces exerted by the stopper during the progressive abutment.
- L'élément déformable est agencé dans l'amortisseur de sorte que, lorsque le coude de la languette se déforme, l'attache coulisse le long des rails. - The deformable element is arranged in the damper so that when the elbow of the tongue is deformed, the clip slides along the rails.
La languette est agencée pour se déformer dans un plan orthoradial par rapport à l'axe de rotation X. La mise en butée progressive peut être stoppée grâce à la butée franche formée par la surface d' arrêt formée sur le support. La mise en butée franche est ainsi obtenue lorsque le coude est déformé suffisamment pour que, de sa zone d'extrémité à son coude, la languette soit en appui contre la surface d'arrêt. - L'attache de l'élément déformable comporte en outre une patte agencée dans un renfoncement du support de façon à stopper le retour de l'élément déformable sous l'action de la force de rappel de la lame élastique. The tongue is arranged to deform in an orthoradial plane relative to the axis of rotation X. The progressive abutment can be stopped thanks to the free stop formed by the stop surface formed on the support. The frank abutment is thus obtained when the elbow is deformed sufficiently so that, from its end zone to its elbow, the tongue is in abutment against the stop surface. - The attachment of the deformable element further comprises a tab arranged in a recess of the support so as to stop the return of the deformable element under the action of the restoring force of the elastic blade.
L'amortisseur est agencé pour que la patte de l'élément déformable vienne buter dans une paroi du renfoncement lorsque le couple transmis a baissé et que la force de rappel élastique a ramené l'élément déformable dans sa position initiale.  The damper is arranged so that the tab of the deformable element abuts in a wall of the recess when the transmitted torque has dropped and the elastic restoring force has brought the deformable element back to its initial position.
L'élément déformable est fabriqué par découpe et pliage et/ou emboutissage d'une tôle telle qu'un acier à ressort.  The deformable element is manufactured by cutting and folding and / or stamping a sheet such as a spring steel.
L'attache de l'élément déformable est fixée sur le support au moyen d'un élément de fixation tel qu'un rivet.  The attachment of the deformable element is fixed on the support by means of a fastening element such as a rivet.
L'élément déformable est une tôle ondulée et la lame élastique est formée par des lacets de cette tôle ondulée agencés pour se rapprocher les uns des autres sous l'action des efforts exercés par le butoir sur ces lacets.  The deformable element is a corrugated sheet and the elastic blade is formed by laces of this corrugated sheet arranged to be closer to each other under the action of the forces exerted by the bumper on these laces.
La tôle ondulée est agencée de sorte que le butoir vienne s'appuyer contre le lacet d'appui opposé à l'attache lors de la mise en butée progressive.  The corrugated sheet is arranged so that the stop comes to bear against the support lace opposite to the fastener during the progressive abutment.
La tôle ondulée est apte à se déformer en fléchissant dans une portion de cylindre autour de l'axe de rotation X.  The corrugated sheet is able to deform by bending in a portion of a cylinder around the axis of rotation X.
La tôle ondulée comporte une première extrémité plate sur laquelle est formée l'attache.  The corrugated sheet has a first flat end on which the fastener is formed.
- La tôle ondulée comporte une seconde extrémité plate et le butoir est agencé de façon à passer au dessus de la seconde extrémité plate avant de s'appuyer contre ledit lacet d'appui lors de la mise en butée progressive. - The corrugated sheet has a second flat end and the stopper is arranged to pass over the second flat end before leaning against said support lace during the progressive abutment.
Le dispositif de fin de course comporte un élément d' arrêt formé dans la masse du premier ou second élément sur lequel est fixée la tôle ondulée.  The end - of - stroke device comprises a stop element formed in the mass of the first or second element on which the corrugated sheet is fixed.
- L'élément d'arrêt est formé sur l'extrémité d'une dent s'étendant circonférentiellement autour de l'axe X. - The stop element is formed on the end of a tooth extending circumferentially around the axis X.
le dispositif de fin de course est agencé de telle sorte que le butoir vienne s'appuyer directement contre l'élément d'arrêt dans la phase de rotation solidaire des premier et second éléments. Ainsi, le couple passe par l'élément déformable uniquement lors de la phase de mise en butée progressive. the end-of-stroke device is arranged in such a way that the stopper comes to bear directly against the stop element in the rotation phase solidary of the first and second elements. Thus, the torque passes through the deformable element only during the phase of progressive abutment.
Le butoir est agencé de façon pouvoir venir en appui contre la tôle ondulée lors de la mise en butée progressive puis directement contre l'élément d'arrêt de la dent lors de la phase de rotation solidaire des premier et second éléments. The bumper is arranged so as to bear against the corrugated sheet during progressive abutment and directly against the stop element of the tooth during the phase of rotation of the first and second elements.
Selon un mode de réalisation de l'invention, l'élément déformable et l'élément déformable opposé sont formés sur une même pièce. According to one embodiment of the invention, the deformable element and the opposite deformable element are formed on the same part.
L'élément déformable et l'élément déformable opposé possèdent une attache commune.  The deformable element and the opposite deformable element have a common fastener.
- L'attache est fixée à l'un des premier et second éléments avec des éléments de fixation tels que des rivets. - The fastener is attached to one of the first and second elements with fasteners such as rivets.
La lame élastique est formée sur un doigt s 'étendant radialement depuis l'attache, ce doigt étant agencé pour être sollicité dans le premier sens de rotation relative.  The elastic blade is formed on a finger extending radially from the fastener, this finger being arranged to be biased in the first direction of relative rotation.
- Deux doigts élastiques s'étendent radialement depuis l'attache commune. - Two elastic fingers extend radially from the common fastener.
Un doigt élastique opposé est agencé pour être sollicité dans le sens opposé au premier sens de rotation relative.  An opposing elastic finger is arranged to be biased in the opposite direction to the first direction of relative rotation.
Chaque doigt comporte un coude de liaison avec l'attache.  Each finger has a connecting elbow with the clip.
Chaque coude est agencé pour se déformer lors de la mise en butée progressive dans le premier sens de rotation relative ou dans le sens opposé, respectivement lorsque le butoir ou le butoir opposé vient en appui contre le doigt ou le doigt opposé.  Each bend is arranged to deform during progressive abutment in the first direction of relative rotation or in the opposite direction, respectively when the bumper or the opposite bumper bears against the finger or the opposite finger.
L'attache est fixée à l'un des premier et second éléments à l'intérieur du suiveur de came.  The clip is attached to one of the first and second members within the cam follower.
- Les deux doigts s'étendent radialement de part et d'autre du galet. - The two fingers extend radially on either side of the roller.
Le butoir est agencé de manière à venir en appui contre une zone d'extrémité libre du doigt.  The stopper is arranged to bear against a free end area of the finger.
L' élément en saillie dans lequel est logé le suiveur de came comporte un élément d' arrêt sur lequel peut venir en butée le doigt.  The protruding element in which the cam follower is mounted has a stop member on which the finger can abut.
- L'élément en saillie comporte respectivement, circonférentiellement de part d'autre du suiveur de came, un élément d'arrêt et un élément d'arrêt opposé sur lesquels peuvent venir en butée respectivement le doigt et le doigt opposé. Chaque élément d'arrêt est une surface d'arrêts s 'étendant sensiblement radialement et perpendiculairement à l'axe X. Chaque doigt comporte, sur sa zone d'extrémité, un absorbeur de choc. - The projecting element respectively comprises, circumferentially on either side of the cam follower, a stop member and an opposite stop member on which can abut respectively the finger and the opposite finger. Each stop member is a stop surface extending substantially radially and perpendicularly to the X axis. Each finger has, on its end zone, a shock absorber.
L'absorbeur de choc est agencé pour absorber les chocs entre l'élément déformable et le butoir lorsque l'élément déformable et le butoir viennent en appui l'un contre l'autre. Ainsi, il n'y a presque aucun bruit lors du contact entre l'élément déformable et le butoir au début de la mise en butée progressive. The shock absorber is arranged to absorb the shocks between the deformable element and the bumper when the deformable element and the bumper bear against each other. Thus, there is almost no noise during the contact between the deformable element and the stopper at the beginning of the progressive abutment.
L'absorbeur de choc est agencé pour absorber les chocs entre le doigt et l'élément d'arrêt lorsque le doigt et l'élément d'arrêt viennent en appui l'un contre l'autre.  The shock absorber is arranged to absorb shocks between the finger and the stop member when the finger and the stop member bear against each other.
Deux absorbeurs de chocs sont agencés pour absorber respectivement les chocs respectivement entre le doigt et l'élément d'arrêt et entre le doigt opposé et l'élément d'arrêt opposé.  Two shock absorbers are arranged to respectively absorb shocks respectively between the finger and the stop member and between the opposite finger and the opposite stop member.
Chaque absorbeur de choc est agencé pour se déformer lors de la mise en butée progressive des premier et second éléments. Cela permet ainsi de générer une raideur supplémentaire de fin de course.  Each shock absorber is arranged to deform during the progressive abutment of the first and second elements. This allows to generate an additional stiffness of end of race.
Chaque absorbeur de choc est réalisé en matériau déformable, tel que de l'élastomère, par exemple du caoutchouc.  Each shock absorber is made of deformable material, such as elastomer, for example rubber.
Un même absorbeur de choc est sollicité à la fois au début de la mise en butée progressive et en fin de mise en butée progressive, lorsque le doigt s'appuie contre l'élément d'arrêt.  The same shock absorber is solicited both at the beginning of the progressive abutment and at the end of progressive abutment, when the finger bears against the stop element.
Selon un autre mode de réalisation de l'invention, l'élément déformable et l'élément déformable sont formés d'une seule pièce et comportent une lame élastique commune.  According to another embodiment of the invention, the deformable element and the deformable element are formed in one piece and comprise a common elastic blade.
Selon ce mode de réalisation, l'attache comporte deux boucles montées chacune autour d'un support en forme de plot. Ainsi, aucun élément de fixation additionnel n'est nécessaire.  According to this embodiment, the fastener comprises two loops each mounted around a support in the form of a stud. Thus, no additional fastener is needed.
La lame élastique s'étend entre les deux boucles de montage.  The elastic blade extends between the two mounting loops.
La lame comporte au moins un lacet apte à fléchir lors de la mise en butée progressive.  The blade comprises at least one lace capable of bending during progressive abutment.
L'élément déformable est monté autour des deux plots de telle sorte que la lame soit maintenue précontrainte entre les deux plots. Autrement dit, la lame élastique est comprimée à l'intérieur des deux plots.  The deformable element is mounted around the two studs so that the blade is maintained prestressed between the two studs. In other words, the elastic blade is compressed inside the two studs.
Le dispositif de fin de course est agencé de sorte qu'au moins un butoir vienne en appui contre l'une des boucles pour permettre la mise en butée progressive entre les premier et second éléments. Pour ce faire, un jeu est ménagé entre la boucle assurant la mise en butée progressive et le plot, du côté du plot opposé à la lame, pour permettre une déformation de la lame et un rapprochement des boucles lors de la déformation de l'élément déformable. The end-of-stroke device is arranged so that at least one stop comes to bear against one of the loops to allow the progressive stop between the first and second elements. To do this, a clearance is provided between the loop ensuring the progressive abutment and the stud, on the side of the stud opposite to the blade, to allow deformation of the blade and approximation of the loops during the deformation of the element deformable.
- Le plot comporte un élément d'arrêt bloquant le déplacement de la boucle et mettant ainsi fin à la mise en butée progressive. - The stud has a stop member blocking the movement of the loop and thus ending the progressive abutment.
L'élément d'arrêt est une surface d'arrêt formée sur le plot, du coté opposé à la lame.  The stop element is a stop surface formed on the stud, on the opposite side to the blade.
Lors de la rotation solidaire des premier et second éléments, la boucle est serrée respectivement entre l'un des butoir et l'un des plots.  During the integral rotation of the first and second elements, the loop is clamped respectively between one of the stopper and one of the pads.
La lame élastique de l'élément déformable est apte à se déformer en fléchissant dans un plan perpendiculaire à l'axe de rotation X.  The elastic blade of the deformable element is able to deform by bending in a plane perpendicular to the axis of rotation X.
La lame de l'élément déformable comporte ici plusieurs lacets agencés pour se rapprocher les uns des autres lors de la mise en butée progressive.  The blade of the deformable element here comprises a plurality of laces arranged to approach each other during the progressive abutment.
- Selon certains modes de réalisation de l'invention, l'organe de transmission de l'amortisseur comporte au moins un bras élastique et la lame élastique et une portion au moins de ce bras sont agencés axialement l'un en regard de l'autre. According to certain embodiments of the invention, the transmission member of the damper comprises at least one elastic arm and the elastic blade and at least a portion of this arm are arranged axially facing each other. .
Selon un mode de réalisation, l'élément déformable est porté par l'un des premier et second éléments et le dispositif de fin de course comporte en outre un butoir porté par l'autre des premier et second éléments, l'élément déformable et le butoir étant agencés de façon à venir en appui l'un contre l'autre lors de la mise en butée progressive entre les premier et second éléments, dans le premier sens de rotation relative A, la lame élastique de l'élément déformable étant apte à se déformer sous l'action des efforts exercés par le butoir sur l'élément déformable, de manière à produire la mise en butée progressive entre les premier et second éléments dans le premier sens de rotation relative (A). According to one embodiment, the deformable element is carried by one of the first and second elements and the end-of-travel device further comprises a bumper carried by the other of the first and second elements, the deformable element and the bumper being arranged so as to bear against each other during progressive abutment between the first and second elements, in the first relative direction of rotation A, the elastic blade of the deformable element being adapted to deform under the action of the forces exerted by the stopper on the deformable element, so as to produce progressive abutment between the first and second elements in the first direction of relative rotation (A).
Selon un mode de réalisation, le dispositif de fin de course comporte un élément d'arrêt agencé pour mettre fin à la déformation de l'élément déformable dans le premier sens de rotation relative et entraîner les premier et second éléments dans une rotation solidaire. Par exemple, le dispositif de fin de course est agencé de sorte que la mise en butée progressive commence lorsque le couple transmis par l'amortisseur dépasse un premier seuil de couple, par exemple supérieur à 200N.m According to one embodiment, the end-of-stroke device comprises a stop element arranged to put an end to the deformation of the deformable element in the first relative direction of rotation and to cause the first and second elements in a fixed rotation. For example, the end-of-stroke device is arranged so that the progressive abutment begins when the torque transmitted by the damper exceeds a first torque threshold, for example greater than 200N.m
Le cas échéant, la mise en rotation solidaire commence lorsque le couple transmis par l'amortisseur dépasse un second seuil de couple, le second seuil de couple étant supérieur au premier seuil de couple ; Where appropriate, the integral rotation starts when the torque transmitted by the damper exceeds a second torque threshold, the second torque threshold being greater than the first torque threshold;
Avantageusement, le dispositif de fin de course est agencé de sorte que, lors de la phase de rotation solidaire des premier et second éléments empêchant toute rotation relative supplémentaire entre les premier et second éléments dans le premier sens de rotation relative, la lame élastique de l'élément déformable reste déformée et exerce un effort de rappel élastique sur le butoir apte à faire tourner les premier et second éléments dans le sens opposé au premier sens de rotation relative lorsque le couple transmis entre les premier et second éléments devient inférieur au second seuil de couple. Autrement dit, la phase de rotation solidaire est réversible. Il ne s'agit pas d'un verrouillage en rotation des premier et second éléments. Aussi, le dispositif de fin de course est dépourvu de moyens de blocage en rotation des premier et second éléments agissant simultanément dans les deux sens de rotation relative. Ainsi, lorsque le couple transmis par l'amortisseur redescend en dessous du second seuil de couple, les premier et second éléments tournent dans le sens opposé au premier sens de rotation relative sous l'action de l'élément déformable, et l'amortisseur n'est pas bloqué.  Advantageously, the end-of-stroke device is arranged so that, during the phase of rotation of the first and second elements preventing any additional relative rotation between the first and second elements in the first relative direction of rotation, the elastic blade of the deformable element remains deformed and exerts an elastic return force on the stopper capable of rotating the first and second elements in the opposite direction to the first direction of relative rotation when the torque transmitted between the first and second elements becomes less than the second threshold of couple. In other words, the phase of integral rotation is reversible. It is not a locking rotation of the first and second elements. Also, the end-of-stroke device is devoid of rotation locking means of the first and second elements acting simultaneously in the two directions of relative rotation. Thus, when the torque transmitted by the damper drops below the second torque threshold, the first and second elements rotate in the opposite direction to the first direction of relative rotation under the action of the deformable element, and the damper n is not blocked.
L'élément d'arrêt est agencé pour mettre fin à la déformation de l'élément déformable uniquement dans le premier sens de rotation relative. Autrement dit, lorsque le butoir et l'élément d'arrêt sont en appui l'un contre l'autre, un seul sens de rotation relative est empêché. Ainsi, l'amortisseur n'est pas bloqué.  The stop member is arranged to terminate deformation of the deformable member only in the first direction of relative rotation. In other words, when the stopper and the stop member are pressed against each other, a single direction of relative rotation is prevented. Thus, the damper is not blocked.
Le dispositif de fin de course est agencé de sorte que la portion de l'élément déformable contre laquelle s'appuie le butoir est poussé circonférenciellement par le butoir lors de la phase de mise en butée progressive. De préférence, la lame élastique se déforme dans un plan perpendiculaire à l'axe X pour emmagasiner un sur-couple plus important. The end-of-stroke device is arranged in such a way that the portion of the deformable element against which the stopper bears is pushed circumferentially by the stopper during the phase of progressive abutment. Preferably, the elastic blade is deformed in a plane perpendicular to the X axis to store a larger over-torque.
De préférence, l'élément déformable est distant du butoir avant que les premier et second éléments n'atteignent la phase de mise en butée progressive.  Preferably, the deformable element is distant from the buffer before the first and second elements reach the phase of progressive abutment.
Si on le souhaite, l'élément déformable est agencé de façon à frotter contre ledit un des premier et second élément qui le porte lors de la phase de mise en butée progressive. Ainsi une partie de l'énergie absorbée à l'occasion du surcouple peut être dissipée. Par exemple, l'élément déformable peut frotter contre ledit élément par l'intermédiaire d'un absorbeur de choc. If desired, the deformable member is arranged to rub against said one of the first and second members that carries it during the phase of progressive abutment. Thus part of the energy absorbed during the overtorque can be dissipated. For example, the deformable element can rub against said element by means of a shock absorber.
Dans la présente demande et dans l'expression « Mettre fin à la déformation », le terme déformation doit être compris dans son sens dynamique. Cela signifie que dans la phase de rotation solidaire, l'élément déformable reste déformé suite à la phase de mise en butée progressive, mais ne se déforme pas davantage. Autrement dit, l'élément déformable cesse de se déformer davantage lorsqu'un couple est transmis entre le butoir et l'élément d'arrêt. In the present application and in the expression "put an end to deformation", the term deformation must be understood in its dynamic sense. This means that in the phase of integral rotation, the deformable element remains deformed following the phase of progressive abutment, but does not further deform. In other words, the deformable element ceases to deform further when a torque is transmitted between the stopper and the stop element.
L'invention a également pour objet un double volant amortisseur selon l'invention tel que décrit ci-dessus, le premier élément étant l'un des volants d'inertie primaire et secondaire et le second élément étant l'autre des volants d'inertie primaire et secondaire The invention also relates to a double damping flywheel according to the invention as described above, the first element being one of the flywheels of primary and secondary inertia and the second element being the other flywheels of inertia primary and secondary
L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaîtront plus clairement au cours de la description suivante de plusieurs modes de réalisation particuliers de l'invention, donnés uniquement à titre illustratif et non limitatif, en référence aux figures annexées. Sur ces figures : The invention will be better understood, and other objects, details, characteristics and advantages thereof will appear more clearly in the course of the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes. with reference to the appended figures. In these figures:
La figure 1 est une vue de face d'un double volant amortisseur comportant un dispositif de fin de course selon un premier mode de réalisation de l'invention, la position angulaire relative des deux volants étant ici éloignée de la fin de course. La figure 2 est une vue en coupe selon II-II du double volant amortisseur de la figure 1. FIG. 1 is a front view of a double damping flywheel comprising an end-of-travel device according to a first embodiment of the invention, the relative angular position of the two wheels being here remote from the end of travel. FIG. 2 is a sectional view on II-II of the double damping flywheel of FIG. 1.
La figure 3 est une vue schématique en perspective, de l'élément déformable du double volant amortisseur de la figure 1  FIG. 3 is a diagrammatic perspective view of the deformable element of the double damping flywheel of FIG. 1
La figure 4 est une vue schématique en perspective, de l'élément déformable d'un double volant amortisseur selon un deuxième mode de réalisation, l'élément déformable étant représenté en position de repos.  Figure 4 is a schematic perspective view of the deformable element of a double damping flywheel according to a second embodiment, the deformable element being shown in the rest position.
La figure 5 est une vue schématique de face, de l'élément déformable du double volant amortisseur de la figure 4, l'élément déformable étant représenté en position de repos.  Figure 5 is a schematic front view of the deformable element of the double damping flywheel of Figure 4, the deformable element being shown in the rest position.
La figure 6 est une vue schématique selon la coupe A-A de l'élément déformable de la figure 5.  FIG. 6 is a schematic view along section A-A of the deformable element of FIG. 5.
La figure 7 est une vue schématique en perspective de l'élément déformable d'un double volant amortisseur selon un troisième mode de réalisation, l'élément déformable étant représenté en position de repos.  Figure 7 is a schematic perspective view of the deformable element of a double damping flywheel according to a third embodiment, the deformable element being shown in the rest position.
La figure 8 est une vue schématique en perspective de l'élément déformable d'un double volant amortisseur selon un quatrième mode de réalisation, l'élément déformable étant représenté en position de repos.  Figure 8 is a schematic perspective view of the deformable element of a double damping flywheel according to a fourth embodiment, the deformable element being shown in the rest position.
La figure 9 est une vue schématique et partielle en coupe du double volant amortisseur de la figure 8.  FIG. 9 is a schematic and partial sectional view of the double damping flywheel of FIG. 8.
La figure 10 est une vue schématique en perspective de l'élément déformable d'un double volant amortisseur selon un cinquième mode de réalisation, l'élément déformable étant représenté en position de repos. La figure 11 est une vue schématique en perspective de l'élément déformable d'un double volant amortisseur selon un sixième mode de réalisation, l'élément déformable étant représenté en position de repos. Figure 10 is a schematic perspective view of the deformable element of a double damping flywheel according to a fifth embodiment, the deformable element being shown in the rest position. Figure 11 is a schematic perspective view of the deformable element of a double damping flywheel according to a sixth embodiment, the deformable element being shown in the rest position.
La figure 12 illustre les phases de fonctionnement de amortisseur et notamment la phase de mise en butée progressive PI ' .  FIG. 12 illustrates the phases of damper operation and in particular the phase of progressive abutment P1 '.
Dans la description et les revendications, on utilisera, les termes "externe" et "interne" ainsi que les orientations "axiale" et "radiale" pour désigner, selon les définitions données dans la description, des éléments du double volant amortisseur. Par convention, l'orientation "radiale" est dirigée orthogonalement à l'axe X de rotation du double volant amortisseur déterminant l'orientation "axiale" et, de l'intérieur vers l'extérieur en s'éloignant dudit axe X, l'orientation "circonférentielle" est dirigée orthogonalement à l'axe X de rotation du double volant amortisseur et perpendiculaire à la direction radiale. « Circonférentiellement » signifie dans la direction circonférentielle et n'implique pas ici nécessairement une courbe fermée. Les termes "externe" et "interne" sont utilisés pour définir la position relative d'un élément par rapport à un autre, par référence à l'axe X de rotation du double volant amortisseur, un élément proche de l'axe est ainsi qualifié d'interne par opposition à un élément externe situé radialement en périphérie. In the description and the claims, the terms "external" and "internal" as well as the "axial" and "radial" orientations will be used to designate, according to the definitions given in the description, elements of the double damping flywheel. By convention, the "radial" orientation is directed orthogonally to the X axis of rotation of the double damping flywheel determining the "axial" orientation and, from the inside towards the outside away from said axis X, the "Circumferential" orientation is directed orthogonally to the X axis of rotation of the double damping flywheel and perpendicular to the radial direction. "Circumferentially" means in the circumferential direction and does not necessarily imply a closed curve here. The terms "external" and "internal" are used to define the relative position of one element relative to another, with reference to the axis X of rotation of the double damping flywheel, an element close to the axis is thus qualified. internally as opposed to an outer member located radially peripherally.
Dans la description, l'amortisseur présenté est un amortisseur du type double volant amortisseur dans lequel le premier élément est un volant d'inertie primaire et le second élément est un volant d'inertie secondaire. In the description, the shock absorber shown is a damper type double damping flywheel in which the first element is a primary flywheel and the second element is a secondary flywheel.
Sur les figures 1 à 9, l'élément déformable est monté sur le volant d'inertie primaire tandis que le(s) butoir(s) est (sont) monté(s) sur le volant d'inertie secondaire. Un montage inversé, c'est-à-dire avec l'élément déformable monté sur le volant secondaire est néanmoins possible pour ces modes de réalisation. Sur les figures 10 à 11, l'élément déformable est monté sur le volant d'inertie secondaire tandis que le(s) butoir(s) est (sont) monté(s) sur le volant d'inertie primaire. Un montage inversé, c'est-à-dire avec l'élément déformable monté sur le volant primaire est néanmoins possible pour ces deux modes de réalisation. In Figures 1 to 9, the deformable element is mounted on the primary flywheel while the (s) stop (s) is (are) mounted (s) on the secondary flywheel. An inverted mounting, that is to say with the deformable element mounted on the secondary flywheel is nevertheless possible for these embodiments. In Figures 10 to 11, the deformable element is mounted on the secondary flywheel while the (s) stop (s) is (are) mounted (s) on the primary flywheel. An inverted assembly, that is to say with the deformable element mounted on the primary flywheel is nevertheless possible for these two embodiments.
On se réfère d'abord aux figures 1 à 3 qui représentent un double volant amortisseur 1. Le double volant amortisseur 1 comprend un volant d'inertie primaire 2, destiné à être fixé en bout d'un vilebrequin d'un moteur à combustion interne, non représenté, et un volant d'inertie secondaire 3 qui est centré et guidé sur le volant primaire 2 au moyen d'un palier à roulement à billes 4. Le volant secondaire 3 est destiné à former le plateau de réaction d'un embrayage, non représenté, relié à l'arbre d'entrée d'une boîte de vitesse. Les volants d'inertie primaire 2 et secondaire 3 sont destinés à être montés mobiles autour d'un axe de rotation X et sont, en outre, mobiles en rotation l'un par rapport à l'autre autour dudit axe X. Referring first to Figures 1 to 3 which represent a double damping flywheel 1. The dual damping flywheel 1 comprises a primary flywheel 2, intended to be attached to the end of a crankshaft of an internal combustion engine , no shown, and a secondary flywheel 3 which is centered and guided on the primary flywheel 2 by means of a rolling ball bearing 4. The secondary flywheel 3 is intended to form the reaction plate of a clutch, no shown, connected to the input shaft of a gearbox. The primary flywheels 2 and secondary 3 are intended to be mounted movable about an axis of rotation X and are, moreover, rotatable relative to each other about said axis X.
Le volant primaire 2 comporte un moyeu 5 radialement interne supportant le palier à roulement 4, une portion annulaire 6 s' étendant radialement et une portion cylindrique 7 s 'étendant axialement, du côté opposé au moteur, depuis la périphérie externe de la portion annulaire 6. Ce moyeu est pourvu d'orifices 27 pour le passage de vis, pour la fixation du double volant amortisseur 1 au nez du vilebrequin. Le moyeu 5 du volant primaire 2, comporte un épaulement 29 servant à l'appui de la bague interne du palier à roulement 4 et retenant ladite bague interne, en direction du moteur. The primary flywheel 2 comprises a radially inner hub 5 supporting the rolling bearing 4, an annular portion 6 extending radially and a cylindrical portion 7 extending axially, on the side opposite the motor, from the outer periphery of the annular portion 6. This hub is provided with orifices 27 for the passage of screws, for fixing the double damping flywheel 1 to the nose of the crankshaft. The hub 5 of the primary flywheel 2 has a shoulder 29 serving to support the inner ring of the rolling bearing 4 and retaining said inner ring towards the motor.
Le volant primaire 2 porte, sur sa périphérie extérieure, une couronne dentée 10 pour l'entraînement en rotation du volant primaire 2, à l'aide d'un démarreur. The primary flywheel 2 carries, on its outer periphery, a ring gear 10 for driving in rotation of the primary flywheel 2, using a starter.
Le volant secondaire 3 comporte une surface annulaire plane 13, tournée du côté opposé au volant primaire 2, formant une surface d'appui pour une garniture de friction d'un disque d'embrayage, non représentée. Le volant secondaire 3 comporte, à proximité de son bord externe, des plots (non représentés) et des orifices 15 servant au montage d'un couvercle d'embrayage. The secondary flywheel 3 has a flat annular surface 13, turned on the opposite side to the primary flywheel 2, forming a bearing surface for a friction lining of a clutch disk, not shown. The secondary flywheel 3 has, close to its outer edge, studs (not shown) and orifices 15 for mounting a clutch cover.
Les volants primaire 2 et secondaire 3 sont couplés en rotation par des moyens d'amortissement comportant un organe de transmission 60 monté solidaire en rotation du volant secondaire 3 et doté de deux bras élastiques 61a, 61b. Les bras élastiques 61a, 61b sont portés par une portion de fixation 62 en forme de corps annulaire pourvu d'orifices permettant le passage des rivets 28 de fixation au volant secondaire 3. L'organe de transmission est compris dans un plan perpendiculaire à l'axe de rotation et présente un axe de symétrie axial. Une portion coudée 63 relie le corps annulaire de fixation 62 à chaque bras élastique 61a, 61b. Les deux bras élastiques 61a, 61b sont recourbées autour de l'axe de rotation X depuis la portion coudée 63 jusqu'à une zone d'extrémité 64a, 64b. Ces zones d'extrémité sont libres. Les bras élastiques 61a, 61b comportent une surface de came 20 qui est agencée pour coopérer avec un suiveur de came 21, porté par le volant primaire 2. La courbure des bras élastiques ainsi que leur longueur sont déterminées en fonction de la raideur souhaitée pour les bras élastiques 61a, 61b. Les suiveurs de came comportent des galets 26 portés par des tiges cylindriques 22 fixées au volant primaire 2. Les galets 26 sont montés mobiles en rotation autour de tiges cylindriques 22 le long d'un axe de rotation parallèle à l'axe de rotation X. Grâce à l'élasticité des bras élastiques 61a et 61b, les galets 26 sont maintenus en appui contre les surfaces de came 20 et sont agencés pour rouler contre chaque surface de came 20 lors d'un mouvement relatif entre les volants primaire 2 et secondaire 3. Les galets 26 sont disposés radialement à l'extérieur des surfaces de came 20 respective de sorte à maintenir radialement les bras élastiques 61a, 61b lorsqu'ils sont soumis à la force centrifuge. De façon à réduire les frottements parasitaires susceptibles d'affecter la fonction d'amortissement, les galets 26 sont avantageusement montés en rotation sur les tiges cylindriques 22 par l'intermédiaire de corps roulants tels que des billes ou des rouleaux. The primary flywheels 2 and secondary 3 are coupled in rotation by damping means comprising a transmission member 60 mounted to rotate with the secondary flywheel 3 and provided with two elastic arms 61a, 61b. The elastic arms 61a, 61b are carried by an attachment portion 62 in the form of an annular body provided with orifices allowing the rivets 28 for attachment to the secondary flywheel 3 to pass therethrough. The transmission member is included in a plane perpendicular to the axis of rotation and has an axis of axial symmetry. A bent portion 63 connects the annular fixing body 62 to each elastic arm 61a, 61b. The two resilient arms 61a, 61b are bent around the axis of rotation X from the bent portion 63 to an end zone 64a, 64b. These end zones are free. The elastic arms 61a, 61b comprise a cam surface 20 which is arranged to cooperate with a cam follower 21, carried by the primary flywheel 2. The curvature of the elastic arms and their length are determined according to the desired stiffness for the elastic arms 61a, 61b. The cam followers comprise rollers 26 carried by cylindrical rods 22 fixed to the primary flywheel 2. The rollers 26 are mounted to rotate about cylindrical rods 22 along an axis of rotation parallel to the axis of rotation X. Thanks to the elasticity of the elastic arms 61a and 61b, the rollers 26 are held in abutment against the cam surfaces 20 and are arranged to roll against each cam surface 20 during a relative movement between the primary flywheels 2 and secondary 3 The rollers 26 are disposed radially outwardly from the respective cam surfaces 20 so as to radially maintain the resilient arms 61a, 61b when subjected to centrifugal force. In order to reduce the parasitic friction likely to affect the damping function, the rollers 26 are advantageously rotatably mounted on the cylindrical rods 22 by means of rolling bodies such as balls or rollers.
Chaque surface de came 20 est agencée de telle sorte que, pour un débattement angulaire entre le volant primaire 2 et le volant secondaire 3, par rapport à une position angulaire relative de repos, chaque galet 26 se déplace sur la surface de came 20 et, ce faisant, exerce un effort de flexion sur chaque bras élastique 61a, 61b de l'organe de transmission 60. Par réaction, chaque bras élastique 61a, 61b exerce sur le galet 26 une force de rappel qui tend à ramener les volants primaire 2 et secondaire 3 vers leur position angulaire relative de repos. Ainsi, les bras élastiques 61a, 61b de l'organe de transmission sont aptes à transmettre un couple entraînant du volant primaire 2 vers le volant secondaire 3 (sens direct) et un couple résistant du volant secondaire 3 vers le volant primaire 2 (sens rétro). Each cam surface 20 is arranged such that, for an angular displacement between the primary flywheel 2 and the secondary flywheel 3, relative to a relative angular position of rest, each roller 26 moves on the cam surface 20 and, in doing so, exerts a bending force on each elastic arm 61a, 61b of the transmission member 60. By reaction, each elastic arm 61a, 61b exerts on the roller 26 a restoring force which tends to bring back the primary flywheels 2 and secondary 3 to their relative angular position of rest. Thus, the elastic arms 61a, 61b of the transmission member are capable of transmitting a driving torque from the primary flywheel 2 to the secondary flywheel 3 (forward direction) and a resistant torque of the secondary flywheel 3 to the primary flywheel 2 (retro direction ).
Par ailleurs, chaque surface de came 20 présente un profil agencé de telle sorte que, lorsque le couple transmis augmente, le suiveur de came exerce un effort de flexion sur le bras élastique entraînant un rapprochement de sa zone d'extrémité 64a, 64b vers l'axe X et une rotation relative entre les volants telle que les volants primaire 2 et secondaire 3 s'écartent de leur position relative de repos. Furthermore, each cam surface 20 has a profile arranged so that, when the transmitted torque increases, the cam follower exerts a bending force on the elastic arm causing a bringing of its end zone 64a, 64b towards the X axis and a relative rotation between the flywheels such as the primary flywheel 2 and secondary 3 deviate from their relative position of rest.
Ainsi, les vibrations de torsion et les irrégularités de couple sont amorties par la flexion des bras élastiques 61a et 61b des organes d'amortissement. L'amortissement opère lorsqu'un couple est transmis du volant primaire au volant secondaire et également lorsqu'un couple résistant est transmis du volant secondaire 3 vers le volant primaire 2 (sens rétro). Le couple à transmettre entraîne un débattement relatif entre le volant primaire 2 et le volant secondaire dans des sens opposés selon que le couple est transmis en sens direct ou rétro. Thus, the torsional vibrations and the irregularities of torque are dampened by the bending of the elastic arms 61a and 61b of the damping members. The damping operates when a torque is transmitted from the primary flywheel to the secondary flywheel and also when a resistant torque is transmitted from the secondary flywheel 3 to the primary flywheel 2 (retro direction). The torque to be transmitted causes a relative movement between the primary flywheel 2 and the secondary flywheel in opposite directions depending on whether the torque is transmitted in forward direction or retro.
En se reportant de nouveau aux figures 1 à 3, on constate que l'amortisseur comporte des organes de frottement agencés pour exercer un couple résistant entre le volant primaire 2 et le volant secondaire 3 lors de leur débattement relatif. Les organes de frottement comportent une rondelle élastique, de « type Belleville » 32, une première rondelle de frottement 33, et une seconde rondelle de frottement 34 aptes générer une hystérésis lorsque les volants primaire et secondaire tournent l'un par rapport à l'autre. Referring again to Figures 1 to 3, it is found that the damper comprises friction members arranged to exert a resistant torque between the primary flywheel 2 and the secondary flywheel 3 during their relative movement. The friction members comprise a spring washer, of "Belleville type" 32, a first friction washer 33, and a second friction washer 34 able to generate a hysteresis when the primary and secondary flywheels rotate relative to each other .
L'amortisseur comporte, pour un premier sens de rotation relative (A) du volant primaire par rapport au volant secondaire, deux dispositifs de fin de course 50a permettant une mise en butée progressive entre les volants primaire et secondaire. The damper comprises, for a first relative direction of rotation (A) of the primary flywheel relative to the secondary flywheel, two end-of-stroke devices 50a allowing progressive abutment between the primary and secondary flywheels.
Le dispositif de fin de course comporte un élément déformable 51a doté d'une lame élastique 55a agencée pour exercer un effort s'opposant à la poursuite de la rotation relative des volants primaire et secondaire dans le premier sens de rotation relative A lorsque ces éléments viennent en butée progressive. Ainsi, en cas de transmission d'un sur-couple résultant de conditions d'utilisation limites ou d'un dysfonctionnement du groupe motopropulseur, il est possible de limiter la bruyance par adjonction d'une raideur de fin de course juste avant la mise en butée franche, et d'éviter un à-coup dans la transmission du couple, ou un choc. The end-of-travel device comprises a deformable element 51a provided with an elastic blade 55a arranged to exert a force opposing the continuation of the relative rotation of the primary and secondary flywheels in the first relative direction of rotation when these elements come in progressive stop. Thus, in the event of transmission of an over-torque resulting from limited use conditions or from a malfunction of the powertrain, it is possible to limit the noise by adding an end-of-stroke stiffness just prior to the implementation. stop, and avoid a jerk in the transmission of torque, or shock.
La lame élastique 55a est à l'état de repos en dehors de la mise en butée progressive. En revanche, elle est agencée pour se déformer pendant la mise en butée progressive entre les volants primaire et secondaire. The elastic blade 55a is in the rest state outside the progressive abutment. On the other hand, it is arranged to deform during the progressive abutment between the primary and secondary wheels.
L'élément déformable 51a est monté sur le volant primaire 2 et le dispositif de fin de course 50a comporte en outre un butoir 53a porté par le volant secondaire 3. Ce butoir est ici une surface formée sur un élément en saillie 37 du volant secondaire. L'élément déformable 51a et le butoir 53a sont agencés de façon à venir en appui l'un contre l'autre pour produire la mise en butée progressive entre les volants primaire et secondaire, dans le premier sens de rotation relative A. The deformable element 51a is mounted on the primary flywheel 2 and the end-of-travel device 50a further comprises a stopper 53a carried by the secondary flywheel 3. This stopper here is a surface formed on a projecting element 37 of the secondary flywheel. The deformable element 51a and the stopper 53a are arranged to bear against each other to produce progressive abutment between the primary and secondary flywheels, in the first relative direction of rotation A.
La lame élastique 55a de l'élément déformable 51a est apte à se déformer et exercer un effort de rappel élastique, sous l'action des efforts exercés par le butoir 53a sur l'élément déformable 51a, de manière à produire la mise en butée progressive entre les volants primaire 2 et secondaire 3. Ainsi, lors de la phase de mise en butée progressive, la force de rappel élastique exercée par la lame élastique 55a est apte à s'opposer à une rotation relative supplémentaire des volants primaire et secondaire dans le premier sens de rotation relative A. Autrement dit, le dispositif de fin de course est agencé de manière à rendre plus difficile la rotation relative supplémentaire des volants primaire et secondaire dans le premier sens de rotation relative lors de la phase de mise en butée progressive. The elastic blade 55a of the deformable element 51a is able to deform and exert an elastic return force, under the action of the forces exerted by the stopper 53a on the deformable element 51a, so as to produce the progressive abutment between the primary flywheels 2 and secondary 3. Thus, during the phase of progressive abutment, the elastic restoring force exerted by the elastic blade 55a is able to oppose further relative rotation of the primary and secondary flywheels in the first direction of relative rotation A. In other words, the end-of-stroke device is arranged to make more difficult the additional relative rotation of the primary and secondary flywheels in the first direction of relative rotation during the phase of progressive abutment.
L'élément déformable 51a est distant du butoir 53a avant que les volants primaire et secondaire n'atteignent la phase de mise en butée progressive.  The deformable element 51a is distant from the stopper 53a before the primary and secondary flywheels reach the phase of progressive abutment.
Selon le premier mode de réalisation présenté aux figures 1, 2 et 3, le débattement angulaire des volants primaire et secondaire, entre la position angulaire relative de repos, adoptée par l'amortisseur en l'absence de couple à transmettre, et le début de la mise en butée progressive, est d'environ 50°.  According to the first embodiment shown in FIGS. 1, 2 and 3, the angular displacement of the primary and secondary flywheels, between the relative angular position of rest, adopted by the damper in the absence of torque to be transmitted, and the beginning of the progressive abutment is approximately 50 °.
Le dispositif de fin de course 50a comporte en outre un élément d' arrêt 57a, agencé pour limiter la déformation de l'élément déformable 51a dans le premier sens de rotation relative A.  The end-of-stroke device 50a further comprises a stop element 57a, arranged to limit the deformation of the deformable element 51a in the first relative direction of rotation A.
L'élément d'arrêt 57a empêche la poursuite de la rotation relative des volants primaire 2 et secondaire 3 dans le premier sens de rotation relative A et les entraine dans une phase de rotation solidaire.  The stop element 57a prevents the continuation of the relative rotation of the primary flywheels 2 and secondary 3 in the first relative direction of rotation and causes them in a phase of integral rotation.
La phase de mise en butée progressive correspond ici à une rotation relative des deux volants d'un angle d'environ 0,5°.  The phase of progressive abutment here corresponds to a relative rotation of the two flywheels at an angle of about 0.5 °.
L'élément d'arrêt 57a est agencé de telle sorte que, dans la phase de transmission sans amortissement, les efforts exercés par le butoir 53a sur l'élément d'arrêt 57a entraînent les volants primaire et secondaire dans une rotation solidaire.  The stop member 57a is arranged such that, in the non-damping transmission phase, the forces exerted by the stopper 53a on the stop element 57a cause the primary and secondary flywheels to rotate in a fixed rotation.
Le dispositif de fin de course 50a est agencé de sorte que la phase de rotation solidaire P2 fait suite à la phase de mise en butée progressive Ρ .  The end-of-stroke device 50a is arranged such that the integral phase of rotation P2 follows the phase of progressive abutment Ρ.
Dans la phase de mise en rotation solidaire, les volants primaire 2 et secondaire 3 sont en butée franche l'un contre l'autre et tournent ensemble, de manière à empêcher toute rotation relative entre les volants primaire et secondaire, dans le premier sens de rotation relative A. La phase de mise en rotation solidaire est une phase de transmission de couple sans amortissement. Cette phase de rotation solidaire se produit, selon le premier sens de rotation relative A, après la phase de mise en butée progressive. La progressivité de la butée prend fin et la butée entre les volants primaire 2 et secondaire 3 devient franche. In the phase of integral rotation, the primary flywheels 2 and secondary 3 are in abutment against one another and rotate together, so as to prevent relative rotation between the primary and secondary flywheels, in the first direction of rotation relative A. The phase of integral rotation is a phase of torque transmission without damping. This phase of integral rotation occurs, according to the first direction of relative rotation A, after the phase of progressive abutment. The progressivity of the abutment ends and the stop between the primary and secondary 2 flywheels becomes frank.
Ainsi, l'amortisseur, notamment lorsque la rotation relative dans le premier sens de rotation A se prolonge suffisamment, peut passer dans ces trois phases :  Thus, the damper, especially when the relative rotation in the first direction of rotation A is sufficiently prolonged, can pass in these three phases:
la phase de transmission avec amortissement dans laquelle une rotation relative entre les volants primaire 2 et secondaire 3 se produit sans résistance de l'élément déformable 51a,  the damping transmission phase in which a relative rotation between the primary flywheel 2 and the secondary flywheel 3 occurs without resistance of the deformable element 51a,
- puis la phase de mise en butée progressive dans laquelle une rotation relative entre les volants primaire et secondaire se produit encore mais avec une résistance due à l'élément déformable 51a,  - Then the phase of progressive abutment in which a relative rotation between the primary and secondary flywheels still occurs but with a resistance due to the deformable element 51a,
puis la phase de transmission sans amortissement dans laquelle les volants primaire et secondaire tournent solidairement.  then the phase of transmission without damping in which the primary and secondary flywheels rotate jointly.
L'élément d'arrêt 57a comporte une surface d'arrêt agencée sur un élément en saillie 36 par exemple formé dans la masse du volant primaire. The stop element 57a has a stop surface arranged on a projecting element 36 for example formed in the mass of the primary flywheel.
L'élément déformable 51a comporte une attache 56 montée solidaire en rotation du volant primaire 2.  The deformable element 51a comprises a fastener 56 mounted to rotate with the primary flywheel 2.
Le volant primaire comporte un support 38 sur lequel est montée l'attache 56 de l'élément déformable 51. Ce support 38 est formé dans la masse du volant primaire, ici sur l'élément en saillie 36.  The primary flywheel comprises a support 38 on which is mounted the fastener 56 of the deformable element 51. This support 38 is formed in the mass of the primary flywheel, here on the projecting element 36.
Autrement dit, la surface d'arrêt 57a est formée sur le support de montage 36 de l'élément déformable 51a.  In other words, the stop surface 57a is formed on the mounting bracket 36 of the deformable member 51a.
L'attache 56 est fixée sur le support par des éléments de fixations tels que des rivets 71. The fastener 56 is fixed on the support by fastening elements such as rivets 71.
L'attache 56 de l'élément déformable 51 et la lame élastique 55a sont formées d'une seule pièce.  The fastener 56 of the deformable element 51 and the elastic blade 55a are formed in one piece.
La lame élastique 55a comporte un coude 58 de liaison avec l'attache 56. La lame élastique 55a de l'élément déformable 51a s'étend ainsi dans une direction sensiblement perpendiculaire à l'attache 56 de l'élément déformable 51.  The elastic blade 55a has a bend 58 for connection with the fastener 56. The elastic blade 55a of the deformable element 51a thus extends in a direction substantially perpendicular to the fastener 56 of the deformable element 51.
Le dispositif de fin de course 50a est agencé pour que l'élément déformable 51 soit serré rigidement entre le butoir 53a et l'élément d'arrêt 57a dans la phase de rotation solidaire des volants primaire et secondaire, autrement dit lorsque les volants primaire et secondaire sont en butée franche. Ici, c'est la lame élastique 55a qui est serrée entre le butoir 53a et l'élément d'arrêt 57a dans cette phase de fonctionnement. The end-of-stroke device 50a is arranged so that the deformable element 51 is rigidly clamped between the stopper 53a and the stop element 57a in the rotation phase. solidary primary and secondary flywheels, ie when the primary and secondary flywheels are in abutment. Here, it is the elastic blade 55a which is clamped between the stopper 53a and the stop element 57a in this operating phase.
Comme on le voit sur la figure 3, le galet est monté mobile en rotation autour de la tige 22 et l'attache 56 de l'élément déformable 51 est agencée autour de cette tige de façon à assurer la reprise des efforts radiaux exercés par le bras élastique 61a ou 61b sur le galet 26. Autrement dit, l'attache 56 est montée en appui contre la tige 22 de sorte que l'attache contribue à la reprise des efforts radiaux exercés par le bras élastique sur le suiveur de came.  As seen in Figure 3, the roller is rotatably mounted around the rod 22 and the fastener 56 of the deformable element 51 is arranged around this rod so as to ensure the recovery of the radial forces exerted by the elastic arm 61a or 61b on the roller 26. In other words, the fastener 56 is mounted in abutment against the rod 22 so that the fastener contributes to the recovery of the radial forces exerted by the elastic arm on the cam follower.
Si on le souhaite, La tige 22 est formée sur l'un des éléments de fixation 71 de l'attache 56, par exemple un rivet.  If desired, the rod 22 is formed on one of the fasteners 71 of the fastener 56, for example a rivet.
Ici, dans la phase de mois en butée progressive, la lame élastique 55a de l'élément déformable 51 est apte à se déformer en fléchissant dans un plan orthoradial à l'axe de rotation X.  Here, in the progressive abutment month phase, the elastic blade 55a of the deformable element 51 is able to deform by bending in a plane orthoradial to the axis of rotation X.
L'amortisseur 1 comporte en outre au moins un dispositif de fin de course opposé 50b agencé pour permettre une mise en butée progressive entre les volants primaire 2 et secondaire 3, dans un second sens de rotation relative B des volants primaire et secondaire, opposé au premier sens de rotation relative A.  The damper 1 further comprises at least one opposite end-of-travel device 50b arranged to allow progressive abutment between the primary and secondary flywheels 2, in a second relative direction of rotation of the primary and secondary flywheels, opposite to the first direction of relative rotation A.
Le dispositif de fin de course opposé 50b comporte un élément déformable opposé 51b apte à se déformer lors de la mise en butée progressive dans le second sens de rotation relative B.  The opposite end-of-travel device 50b comprises an opposite deformable element 51b able to deform upon progressive abutment in the second relative direction of rotation B.
Le dispositif de fin de course opposé 50b comporte un butoir 53 b opposé agencé pour venir en appui contre l'élément déformable opposé 51b pour permettre une mise en butée progressive entre les volants primaire et secondaire, dans le second sens de rotation relative (B) des volants primaire et secondaire.  The opposite end-of-travel device 50b comprises a stop 53b opposite arranged to bear against the opposite deformable element 51b to allow a progressive abutment between the primary and secondary flywheels, in the second direction of relative rotation (B) primary and secondary steering wheels.
L'élément déformable 51b opposé est doté d'une lame élastique 55b opposée agencée pour exercer un effort s 'opposant à la poursuite de la rotation relative des volants primaire et secondaire dans le second sens de rotation relative (B) lorsque ces éléments viennent en butée progressive.  The deformable element 51b opposite is provided with an opposing elastic blade 55b arranged to exert a force opposing the further relative rotation of the primary and secondary flywheels in the second direction of relative rotation (B) when these elements come into operation. progressive stop.
Par ailleurs, le dispositif de fin de course opposé 50b comporte un élément d'arrêt opposé 57b agencé pour limiter la déformation de l'élément déformable 51b opposé dans le second sens de rotation relative B.  Furthermore, the opposite end-of-travel device 50b comprises an opposite stop element 57b arranged to limit the deformation of the deformable element 51b opposite in the second direction of relative rotation B.
On remarque ici que l'élément déformable opposé est formé ici d'une seule pièce avec l'élément déformable et ont une attache commune 56. Cette pièce comporte un plan de symétrie passant l'axe du galet 26 et l'axe X de l'amortisseur. L'attache 56 est disposée dans un plan perpendiculairement à l'axe de rotation. Autrement dit, cette pièce assure la mise en butée progressive de façon bidirectionnelle, c'est-à-dire dans les deux sens de rotation relative A et B. It is noted here that the opposite deformable element is formed here in one piece with the deformable element and have a common fastener 56. This part comprises a plane of symmetry passing the axis of the roller 26 and the axis X of the 'damper. The clip 56 is arranged in a plane perpendicular to the axis of rotation. In other words, this part ensures the bidirectional progressive abutment, that is to say in the two directions of relative rotation A and B.
L'attache 56 recouvre, au moins partiellement, le galet 26 du suiveur de came. L'élément déformable 51a et l'élément déformable opposé 51b sont agencés circonférentiellement de part et d'autre du suiveur de came 21. Le galet 26 du suiveur de came 21 est logé en partie dans un logement 59 ménagé à l'intérieur de l'élément en saillie 36. Autrement dit, le galet 26 du suiveur de came 21 est logé en partie dans le logement 59 ménagé à l'intérieur du support 38 qui s'étend circonférentiellement de part et d'autre du suiveur de came 21.  The fastener 56 covers, at least partially, the roller 26 of the cam follower. The deformable element 51a and the opposite deformable element 51b are arranged circumferentially on either side of the cam follower 21. The roller 26 of the cam follower 21 is housed partly in a housing 59 formed inside the cam follower. projecting element 36. In other words, the roller 26 of the cam follower 21 is housed partly in the housing 59 formed inside the support 38 which extends circumferentially on either side of the cam follower 21.
La pièce sur laquelle l'élément déformable 51a et l'élément déformable opposé 51b sont formés est un arc qui présente une forme arquée autour de l'axe de rotation X et comporte à ses extrémités d'une part la lame élastique 55a et d'autre part la lame élastique opposée 55b, et entre celles-ci, l'attache 56. Cet arc est formé dans une tôle.  The part on which the deformable element 51a and the opposite deformable element 51b are formed is an arc which has an arcuate shape about the axis of rotation X and has at its ends on the one hand the elastic blade 55a and on the other hand, the opposing elastic blade 55b, and between them, the fastener 56. This arc is formed in a sheet.
Les extrémités de l'arc sont pliées pour former la lame élastique et la lame élastique opposée.  The ends of the arc are bent to form the elastic blade and the opposing elastic blade.
Chaque lame 55a et 55b est apte à se déformer en fléchissant dans un plan orthoradial par rapport à l'axe de rotation X. Les figures 4 à 6 illustrent un second mode de réalisation de l'amortisseur de torsion. Les éléments identiques ou analogues aux éléments du premier mode de réalisation illustré sur les figures 1 à 3, c'est-à-dire remplissant la même fonction, portent le même chiffre de référence augmenté de 100.  Each blade 55a and 55b is able to deform by bending in an orthoradial plane with respect to the axis of rotation X. FIGS. 4 to 6 illustrate a second embodiment of the torsion damper. Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, performing the same function, have the same reference numeral increased by 100.
Dans ce mode de réalisation de l'invention, l'élément déformable 151a et l'élément déformable opposé (non visible sur les figures 4 à 6) sont formés sur des pièces distinctes.  In this embodiment of the invention, the deformable element 151a and the opposite deformable element (not visible in Figures 4 to 6) are formed on separate parts.
L'attache 156 de l'élément déformable 151 est une attache coulissante.  The fastener 156 of the deformable element 151 is a sliding fastener.
Cette attache 156 peut être montée par simple coulissement sur le support 138 formé par exemple sur la partie supérieure de l'élément en saillie 136 du volant primaire.  This fastener 156 can be mounted by simply sliding on the support 138 formed for example on the upper part of the projecting element 136 of the primary flywheel.
L'attache 156 de l'élément déformable comporte quatre encoches 194 agencées pour coulisser le long de deux rails 195 formés sur le support 138 du volant primaire.  The fastener 156 of the deformable element comprises four notches 194 arranged to slide along two rails 195 formed on the support 138 of the primary flywheel.
L'élément déformable a une forme arquée et les rails s'étendent circonférentiellement autour de l'axe de rotation X sur un secteur angulaire d'environ 10 degrés. Les deux rails 195 sont formés sur le support 138 , dans la masse du volant d'inertie primaire 102. L'élément déformable ne nécessite donc pas de moyens de fixation supplémentaires tels que des rivets. The deformable element has an arcuate shape and the rails extend circumferentially about the axis of rotation X on an angular sector of about 10 degrees. The two rails 195 are formed on the support 138, in the mass of the primary flywheel 102. The deformable element therefore does not require additional fastening means such as rivets.
L'élément déformable comporte à une extrémité une languette 155 élastique reliée à l'attache 156 par un coude 158. Dans ce mode de réalisation, la lame élastique 155 est donc formée par cette languette 155.  The deformable element comprises at one end an elastic tongue 155 connected to the fastener 156 by a bend 158. In this embodiment, the elastic blade 155 is thus formed by this tongue 155.
La languette 155 est repliée d'environ 45 degrés par rapport à l'attache 156.  The tongue 155 is bent about 45 degrees with respect to the fastener 156.
L'élément déformable est monté de sorte qu'une portion de la languette, notamment sa zone d'extrémité, soit au contact de l'élément en saillie 136, notamment de la surface d'arrêt 157 même lorsque le butoir est à distance de l'élément déformable 151a. Cette languette peut être précontrainte.  The deformable element is mounted so that a portion of the tongue, in particular its end zone, is in contact with the projecting element 136, in particular of the stop surface 157, even when the buffer is at a distance from the deformable element 151a. This tongue can be prestressed.
L'élément déformable est monté de façon à autoriser une déformation du coude de l'élément déformable et un pivotement de la languette 155 sous l'action des efforts exercés par le butoir lors de la mise en butée progressive. Le butoir vient s'appuyer dans cette phase contre le coude 158. Lorsque le coude de la languette se déforme, l'attache 156 coulisse le long des rails 195.  The deformable element is mounted so as to allow a deformation of the elbow of the deformable element and a pivoting of the tongue 155 under the action of the forces exerted by the stopper during the progressive abutment. The stopper is supported in this phase against the elbow 158. When the elbow of the tongue deforms, the fastener 156 slides along the rails 195.
La languette se déforme alors dans un plan ortho radial par rapport à l'axe de rotation X.  The tongue then deforms in an ortho radial plane with respect to the axis of rotation X.
La mise en butée progressive peut être stoppée grâce à la butée franche formée par la surface d'arrêt 157 formée sur l'élément en saillie 136. La mise en butée franche est ainsi obtenue lorsque le coude est déformé suffisamment pour que, de sa zone d'extrémité à son coude, la languette soit en appui contre l'élément d'arrêt 157.  The progressive abutment can be stopped thanks to the free stop formed by the stop surface 157 formed on the projecting element 136. The abutment is thus obtained when the elbow is deformed sufficiently so that, from its zone end of its elbow, the tongue is in abutment against the stop element 157.
L'attache 156 de l'élément déformable 151 comporte en outre une patte 196 agencée dans un renfoncement 197 du support de façon à stopper le retour de l'élément déformable 151 sous l'action de la force de rappel de la lame élastique.  The fastener 156 of the deformable element 151 further comprises a tab 196 arranged in a recess 197 of the support so as to stop the return of the deformable element 151 under the action of the restoring force of the elastic blade.
La patte 196 vient buter dans une paroi du renfoncement 197 lorsque le couple transmis a baissé et que la force de rappel élastique a ramené l'élément déformable dans sa position initiale.  The tab 196 abuts in a wall of the recess 197 when the transmitted torque has dropped and the elastic restoring force has brought the deformable element back to its initial position.
L'élément déformable 151 est fabriqué par découpe et pliage et/ou emboutissage de tôle, par exemple du type acier à ressort.  The deformable element 151 is manufactured by cutting and folding and / or stamping sheet metal, for example of the spring steel type.
Un élément déformable opposé similaire à cet élément déformable peut être mis en œuvre de façon similaire de l'autre côté du suiveur de came pour assurer la mise en butée progressive dans le sens opposé B. Les éléments déformables et les supports sont ainsi agencé de façon symétrique par rapport à un plan passant par l'axe X de l'amortisseur et l'axe du galet 126. A similar deformable element similar to this deformable element can be similarly implemented on the other side of the cam follower to ensure progressive abutment in the opposite direction B. The deformable elements and the supports are thus arranged symmetrically with respect to a plane passing through the axis X of the damper and the axis of the roller 126.
La figure 7 illustre un troisième mode de réalisation de l'amortisseur de torsion. Les éléments identiques ou analogues aux éléments du premier mode de réalisation illustré sur les figures 1 à 3, c'est-à-dire remplissant la même fonction, portent le même chiffre de référence augmenté de 200. Figure 7 illustrates a third embodiment of the torsion damper. Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, performing the same function, have the same reference number increased by 200.
Dans ce mode de réalisation de l'invention, l'élément déformable 251a et l'élément déformable opposé sont formés sur des pièces distinctes. Le suiveur de came 221 est disposé circonférentiellement entre l'élément déformable et l'élément déformable opposé, non représenté.  In this embodiment of the invention, the deformable element 251a and the opposite deformable element are formed on separate parts. The cam follower 221 is circumferentially disposed between the deformable element and the opposite deformable element, not shown.
L'attache 256 de l'élément déformable est fixée sur le volant d'inertie primaire 202 au moyen d'un élément de fixation tel qu'un rivet 271.  The fastener 256 of the deformable element is fixed on the primary flywheel 202 by means of a fastening element such as a rivet 271.
L'élément déformable est une tôle ondulée 251a et la lame élastique est formée par des lacets 272 agencés pour se rapprocher les uns des autres sous l'action des efforts exercés par le butoir sur ces lacets.  The deformable element is a corrugated sheet 251a and the elastic blade is formed by laces 272 arranged to be closer to each other under the action of the forces exerted by the bumper on these laces.
La tôle ondulée est agencée de sorte que le butoir vienne s'appuyer contre le lacet opposé 272a à l'attache 256 lors de la mise en butée progressive.  The corrugated sheet is arranged so that the stop comes to bear against the opposite lace 272a to the attachment 256 during the progressive abutment.
La tôle ondulée 251a est apte à se déformer en fléchissant dans une portion de cylindre autour de l'axe de rotation X.  The corrugated sheet 251a is able to deform by bending in a portion of a cylinder around the axis of rotation X.
La tôle ondulée 251a comporte une première extrémité plate sur laquelle est formée l'attache 256.  The corrugated plate 251a has a first flat end on which the fastener 256 is formed.
La tôle ondulée comporte une seconde extrémité plate 273 et le butoir est agencé de façon à passer au dessus de la seconde extrémité plate avant de s'appuyer contre le lacet 272a lors de la mise en butée progressive.  The corrugated sheet has a second flat end 273 and the stopper is arranged to pass over the second flat end before bearing against the lace 272a during progressive abutment.
Le dispositif de fin de course comporte un élément d'arrêt 257 formé dans la masse du volant d'inertie primaire. L'élément d'arrêt est formé sur un élément en saillie 236, ici l'extrémité 257 d'une dent 236 s'étendant circonférentiellement autour de l'axe X.  The end-of-travel device comprises a stop element 257 formed in the mass of the primary flywheel. The stop member is formed on a protruding member 236, here the end 257 of a tooth 236 extending circumferentially about the X axis.
L'élément déformable est inséré dans un espace séparant radialement la dent 236 de la portion cylindrique 207 du volant primaire 202. La compression de l'élément déformable est guidée ainsi circonférentiellement par la portion cylindrique du volant primaire 207 et par la dent 236.  The deformable element is inserted in a space radially separating the tooth 236 from the cylindrical portion 207 of the primary flywheel 202. The compression of the deformable element is thus guided circumferentially by the cylindrical portion of the primary flywheel 207 and by the tooth 236.
Le butoir est agencé de façon pouvoir venir en appui contre la tôle ondulée lors de la mise en butée progressive puis directement contre l'élément d'arrêt 257 lors de la phase de rotation solidaire des volants primaire et secondaire. Ainsi, le couple passe par l'élément déformable 251a uniquement lors de la phase de mise en butée progressive. The stopper is arranged so as to be able to bear against the corrugated plate during the progressive abutment and then directly against the stop element 257 during the solidarity rotation of the primary and secondary flywheels. Thus, the torque passes through the deformable element 251a only during the phase of progressive abutment.
Un élément déformable opposé similaire à cet élément déformable peut être mis en œuvre de façon similaire de l'autre côté du suiveur de came pour assurer la mise en butée progressive dans le sens opposé B. Les éléments déformables et les supports peuvent être agencés de façon symétrique par rapport à un plan passant par l'axe X de l'amortisseur et l'axe du galet 226.  A similar deformable element similar to this deformable element can be similarly implemented on the other side of the cam follower to provide progressive abutment in the opposite direction B. The deformable elements and the supports can be arranged symmetrical with respect to a plane passing through the axis X of the damper and the axis of the roller 226.
Les figures 8 et 9 illustrent un quatrième mode de réalisation de l'amortisseur de torsion. Pour faciliter, la compréhension, le volant secondaire, sur lequel est monté l'organe de transmission, n'est pas représenté. Figures 8 and 9 illustrate a fourth embodiment of the torsion damper. To facilitate understanding, the secondary flywheel, on which is mounted the transmission member, is not shown.
Les éléments identiques ou analogues aux éléments du premier mode de réalisation illustré sur les figures 1 à 3, c'est-à-dire remplissant la même fonction, portent le même chiffre de référence augmenté de 300.  Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, fulfilling the same function, have the same reference numeral increased by 300.
Le bras élastique 361 de l'organe de transmission est représentée partiellement pour laisser visible l'élément déformable 351.  The elastic arm 361 of the transmission member is partially shown to leave visible the deformable element 351.
L'élément déformable 351a et l'élément déformable opposé 351b sont formés sur une même pièce 351 et possèdent une attache commune 356. Cette pièce est formée dans une tôle et est plaquée contre la portion annulaire 306 du volant d'inertie primaire, perpendiculairement à l'axe de rotation de l'amortisseur. Le support 338 de l'élément déformable est donc formé par une portion de la portion annulaire 306 du volant primaire 302.  The deformable element 351a and the opposite deformable element 351b are formed on the same part 351 and have a common fastener 356. This part is formed in a sheet and is pressed against the annular portion 306 of the primary flywheel, perpendicular to the axis of rotation of the shock absorber. The support 338 of the deformable element is thus formed by a portion of the annular portion 306 of the primary flywheel 302.
L'attache 356 est rivetée au volant d'inertie primaire avec trois rivets 371.  The fastener 356 is riveted to the primary flywheel with three rivets 371.
Deux doigts élastiques 355a et 355b s'étendent radialement depuis cette attache 356. Le doigt élastique 355a est agencé pour être sollicité dans le premier sens de rotation relative A et le doigt élastique opposé est agencé pour être sollicité dans le sens opposé B.  Two elastic fingers 355a and 355b extend radially from this fastener 356. The elastic finger 355a is arranged to be biased in the first direction of relative rotation A and the opposite elastic finger is arranged to be biased in the opposite direction B.
Chaque doigt 355a, 355b comporte un coude 358 de liaison avec l'attache 356. Each finger 355a, 355b has a bend 358 connecting with the fastener 356.
Chaque coude 358 est agencé pour se déformer lors de la mise en butée progressive dans le premier sens de rotation relative A ou dans le sens opposé B, respectivement lorsque le butoir et le butoir opposé vient en appui contre le doigt ou le doigt opposé. Each elbow 358 is arranged to deform upon progressive abutment in the first direction of relative rotation A or in the opposite direction B, respectively when the stopper and the opposite stop bears against the finger or the opposite finger.
L'attache 356 est fixée au volant d'inertie primaire 302 radialement à l'intérieur du suiveur de came.  The fastener 356 is attached to the primary flywheel 302 radially inside the cam follower.
Les deux doigts 355a et 355b s'étendent sensiblement radialement, circonférentiellement de part et d'autre du galet 326. Le butoir et le butoir opposé, non représentés sur la figure 8, sont portés par le volant d'inertie secondaire. Ils sont agencés de manière à venir en appui respectivement contre une zone d'extrémité libre du doigt 355a et une zone d'extrémité libre du doigt opposé 355b. The two fingers 355a and 355b extend substantially radially, circumferentially on either side of the roller 326. The bumper and the opposite bumper, not shown in Figure 8, are carried by the secondary flywheel. They are arranged to respectively bear against a free end zone of the finger 355a and a free end zone of the opposite finger 355b.
Chaque galet 326 est logé dans un logement ménagé dans un élément en saillie Each roller 326 is housed in a housing formed in a projecting element
336, notamment formé dans la masse du volant d'inertie primaire 302. 336, in particular formed in the mass of the primary flywheel 302.
Cet élément en saillie 336 comporte respectivement, circonférentiellement de part d'autre du suiveur de came, un élément d'arrêt 357a et un élément d'arrêt opposé 357b sur lesquels peuvent venir en butée respectivement le doigt 355a et le doigt opposé 355b. Ces éléments d'arrêts sont des surfaces d'arrêts s 'étendant sensiblement radialement et perpendiculairement à l'axe X.  This protruding element 336 respectively comprises, circumferentially on either side of the cam follower, a stop member 357a and an opposite stop member 357b on which the finger 355a and the opposite finger 355b respectively can abut. These stop elements are stop surfaces extending substantially radially and perpendicularly to the X axis.
Chaque doigt comporte, sur sa zone d'extrémité, un absorbeur de choc 375a, 375b, agencé pour absorber les chocs entre l'élément déformable 351a, 351b et le butoir lorsque l'élément déformable 351a, 351b et le butoir viennent en appui l'un contre l'autre. Ainsi, le bruit est limité lors du contact entre l'élément déformable 351a, 351b et le butoir au début de la mise en butée progressive.  Each finger comprises, on its end zone, a shock absorber 375a, 375b, arranged to absorb the shocks between the deformable element 351a, 351b and the bumper when the deformable element 351a, 351b and the bumper come into abutment. against each other. Thus, the noise is limited during the contact between the deformable element 351a, 351b and the buffer at the beginning of the progressive abutment.
Les absorbeurs de chocs sont également prévus pour absorber les chocs respectivement entre le doigt 355a et l'élément d'arrêt 357a et entre le doigt opposé 355b et l'élément d'arrêt opposé 357b.  The shock absorbers are also provided to absorb shocks respectively between the finger 355a and the stop member 357a and between the opposite finger 355b and the opposing stop member 357b.
Ces absorbeurs de chocs 375a et 375b sont agencés pour se déformer lors de la mise en butée progressive des volants primaire et secondaire. Cela permet ainsi de générer une raideur supplémentaire de fin de course.  These shock absorbers 375a and 375b are arranged to deform during the progressive abutment of the primary and secondary flywheels. This allows to generate an additional stiffness of end of race.
Les absorbeurs de choc 375a 375b sont réalisés en matériau déformable, tel que de l'élastomère, par exemple du caoutchouc.  The shock absorbers 375a 375b are made of deformable material, such as elastomer, for example rubber.
Chaque absorbeur de choc pourrait être surmoulé sur l'élément déformable 351 et/ou sur les butoirs. Ici, chaque absorbeur de choc est une pièce rapportée emmanchée sur la zone d'extrémité libre de chaque doigt 355a 355b. Ainsi, un même absorbeur de choc peut limiter les bruits et les chocs à la fois au début de la mise en butée progressive lors du contact entre l'élément déformable et le butoir, et aussi en fin de mise en butée progressive, lorsque le doigt s'appuie contre l'élément d'arrêt.  Each shock absorber could be overmolded on the deformable element 351 and / or on the bumpers. Here, each shock absorber is an insert fitted on the free end area of each finger 355a 355b. Thus, the same shock absorber can limit noises and shocks both at the beginning of the progressive abutment during the contact between the deformable element and the bumper, and also at the end of progressive abutment, when the finger leans against the stop element.
De plus, absorbeur de choc est agencé pour frotter contre le volant primaire de manière à assurer une hystérésis de fin de course. Une zone de frottement 398 est formée radialement à l'extérieur de la portion annulaire 306 du volant primaire 302. Cette zone de frottement peut par exemple être ménagée sur un épaulement reliant la portion annulaire 306 du volant primaire et la portion cylindrique 307 du volant primaire. La zone de frottement se situe sur le secteur angulaire parcouru par le butoir lors de la mise en butée progressive. Pour que le déplacement des doigts 355a et 355b génère un frottement, il faut que l'élément déformable ait été monté avec un précontrainte axiale suffisante pour presser axialement l'extrémité du doigt contre la zone de frottement 398. In addition, shock absorber is arranged to rub against the primary flywheel so as to provide a limit hysteresis. A friction zone 398 is formed radially outside the annular portion 306 of the primary flywheel 302. This friction zone may for example be formed on a shoulder connecting the annular portion 306. of the primary flywheel and the cylindrical portion 307 of the primary flywheel. The friction zone is located on the angular sector traversed by the stopper during the progressive abutment. In order for the movement of the fingers 355a and 355b to generate friction, the deformable element must have been mounted with sufficient axial prestressing to axially press the end of the finger against the friction zone 398.
On remarque que l'élément déformable 351 comporte un plan de symétrie passant par l'axe du galet 326 et l'axe de rotation X.  Note that the deformable element 351 comprises a plane of symmetry passing through the axis of the roller 326 and the axis of rotation X.
La figure 10 illustre un cinquième mode de réalisation de l'amortisseur de torsion. Ici l'élément déformable est monté sur le volant secondaire 403. Pour faciliter, la compréhension, le volant primaire n'est pas représenté et l'organe de transmission est en pointillés. Dans un mode de réalisation non représente, l'élément déformable 451 pourrait également être monté sur le volant primaire.  Fig. 10 illustrates a fifth embodiment of the torsion damper. Here the deformable element is mounted on the secondary flywheel 403. For ease of understanding, the primary flywheel is not shown and the transmission member is in dotted lines. In an embodiment not shown, the deformable element 451 could also be mounted on the primary flywheel.
Les éléments identiques ou analogues aux éléments du premier mode de réalisation illustré sur les figures 1 à 3, c'est-à-dire remplissant la même fonction, portent le même chiffre de référence augmenté de 400.  Elements identical or similar to the elements of the first embodiment illustrated in Figures 1 to 3, that is to say, fulfilling the same function, bear the same reference numeral increased by 400.
Dans ce mode réalisation, l'élément déformable et l'élément déformable sont formés d'une seule pièce (451) et comportent une lame élastique commune 455.  In this embodiment, the deformable element and the deformable element are formed in one piece (451) and comprise a common elastic blade 455.
L'attache de l'élément déformable est monté sur le volant secondaire 403. Elle comporte deux boucles 456a et 456b montées chacune autour d'un support, ici deux éléments en saillie du volant secondaire en forme de plots 438a et 438b. Ainsi, aucun élément de fixation additionnel n'est nécessaire.  The attachment of the deformable element is mounted on the secondary flywheel 403. It comprises two loops 456a and 456b each mounted around a support, here two elements projecting the secondary flywheel shaped pads 438a and 438b. Thus, no additional fastener is needed.
La lame élastique 455 s'étend entre les deux boucles de montage. Elle comporte un lacet 472 apte à fléchir lors de la mise en butée progressive.  The resilient blade 455 extends between the two mounting loops. It comprises a lace 472 capable of flexing during progressive abutment.
L'élément déformable 451 est monté autour des deux plots 436a et 436b de telle sorte que la lame 455 soit maintenue précontrainte entre les deux plots. Autrement dit, la lame élastique est comprimée à l'intérieur des deux plots 436a et 436b.  The deformable element 451 is mounted around the two pads 436a and 436b so that the blade 455 is maintained prestressed between the two pads. In other words, the elastic blade is compressed inside the two studs 436a and 436b.
Le dispositif de fin de course est agencé de sorte qu'au moins un butoir (non représenté) vienne en appui contre l'attache et pousse circonférentiellement l'attache pour déformer la lame de l'élément déformable lors de la mise en butée progressive.  The end-of-stroke device is arranged so that at least one bumper (not shown) bears against the fastener and circumferentially pushes the fastener to deform the blade of the deformable element during progressive abutment.
Pour ce faire, un jeu J est ménagé entre la boucle assurant la mise en butée progressive et le plot, du côté du plot opposé à la lame, pour permettre une déformation de la lame et un rapprochement des boucles 436a et 436b lors de la déformation de l'élément déformable 451. Le plot comporte un élément d' arrêt 457a bloquant le déplacement de la boucle et mettant ainsi fin à la mise en butée progressive dans le premier sens de rotation relative A. Autrement dit, lorsque le jeu J disparait du coté du plot opposé à la lame 455, les volants primaire et secondaire peuvent tourner de façon solidaire en rotation. L'élément d'arrêt 457a est une surface d'arrêt formée égalementr sur un élément en saillie du volant secondaire, le plot 436a, du coté opposé à la lame 455. To do this, a clearance J is provided between the loop ensuring the progressive abutment and the stud, on the side of the stud opposite to the blade, to allow deformation of the blade and a closer approximation of the loops 436a and 436b during the deformation deformable element 451. The stud comprises a stop element 457a blocking the movement of the loop and thus ending the progressive abutment in the first direction of relative rotation A. In other words, when the game J disappears on the side of the stud opposite to the blade 455, the primary and secondary flywheels can rotate in solidarity. The stop member 457a is a stop surface also formed on a protruding element of the secondary flywheel, the pad 436a, on the opposite side to the blade 455.
Autrement dit, l'élément d'arrêt 457 est formé sur le support 438 de l'élément déformable 451. La mis en butée progressive dans le sens opposé est assurée par le même élément déformable 451. Le fonctionnement est le même sur pour le plot opposé 436b et la boucle opposée 456b.  In other words, the stop element 457 is formed on the support 438 of the deformable element 451. The progressive abutment in the opposite direction is provided by the same deformable element 451. The operation is the same on for the stud opposite 436b and the opposite loop 456b.
Lorsque la mise en butée progressive s'achève et qu'il y a rotation solidaire des volants primaire et secondaire, la boucle 456a ou 456b est serrée respectivement entre le butoir et le plot 436a ou entre le butoir opposé et le plot 436b.  When the progressive abutment is completed and there is integral rotation of the primary and secondary flywheels, the loop 456a or 456b is respectively tightened between the bumper and the pad 436a or between the opposite bumper and the pad 436b.
La figure 11 illustre un sixième mode de réalisation de l'amortisseur de torsion proche du quatrième. Pour faciliter, la compréhension, le volant primaire n'est pas représenté et l'organe de transmission est en pointillés. Dans un mode de réalisation non représenté, l'élément déformable pourrait également être monté sur le volant primaire. Figure 11 illustrates a sixth embodiment of the torsion damper close to the fourth. To facilitate understanding, the primary flywheel is not shown and the transmission member is in dashed lines. In an embodiment not shown, the deformable element could also be mounted on the primary flywheel.
Les éléments identiques ou analogues aux éléments du cinquième mode de réalisation illustré sur la figure 10, c'est-à-dire remplissant la même fonction, portent le même chiffre de référence augmenté de 100.  Elements identical or similar to the elements of the fifth embodiment illustrated in FIG. 10, that is to say fulfilling the same function, bear the same reference numeral increased by 100.
La lame 555 de l'élément déformable 551 comporte ici plusieurs lacets 572 agencés pour se rapprocher les uns des autres lors de la mise en butée progressive.  The blade 555 of the deformable element 551 here comprises a plurality of laces 572 arranged to approach each other during progressive abutment.
Cette mise en butée progressive est ainsi moins raide que dans l'exemple précédent.  This progressive abutment is thus less steep than in the previous example.
Le fonctionnement de ce dispositif de fin de course est par ailleurs similaire au mode de réalisation précédent.  The operation of this end-of-travel device is also similar to the previous embodiment.
La figure 12 illustre les 3 phases de fonctionnement d'un double volant amortisseur dans le sens direct selon l'un quelconque des modes de réalisation précédents: FIG. 12 illustrates the 3 phases of operation of a double damping flywheel in the forward direction according to any one of the preceding embodiments:
PI : rotation relative des deux volants avec amortissement du (des) bras élastique(s) de l'organe de transmission, Ρ : mise en butée progressive avec déformation de l'élément déformable PI: relative rotation of the two flywheels with damping of the elastic arm (s) of the transmission member, Ρ: progressive abutment with deformation of the deformable element
P2 rotation solidaire des deux volants.  P2 rotation of the two wheels.
En pointillés est représentée une courbe d'amortissement d'un amortisseur similaire qui ne posséderait pas de dispositif de fin de course selon l'invention.  Dashed is shown a damping curve of a similar damper that would not have a limit device according to the invention.
Bien que l'invention ait été décrite en liaison avec plusieurs modes de réalisation particuliers, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention. L'usage du verbe « comporter », « comprendre » ou « inclure » et de ses formes conjuguées n'exclut pas la présence d'autres éléments ou d'autres étapes que ceux énoncés dans une revendication. L'usage de l'article indéfini « un » ou « une » pour un élément ou une étape n'exclut pas, sauf mention contraire, la présence d'une pluralité de tels éléments ou étapes. Dans les revendications, tout signe de référence entre parenthèses ne saurait être interprété comme une limitation de la revendication. Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention. The use of the verb "to include", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or steps other than those set out in a claim. The use of the indefinite article "a" or "an" for an element or a step does not exclude, unless otherwise stated, the presence of a plurality of such elements or steps. In the claims, any reference sign in parentheses can not be interpreted as a limitation of the claim.

Claims

REVENDICATIONS
1. Amortisseur, notamment un amortisseur de torsion, notamment pour un embrayage d' automobile, comprenant : Shock absorber, in particular a torsion damper, in particular for an automobile clutch, comprising:
- un premier (2, 102, 202, 302, 402, 502) et un second élément (3, 403, 503) en rotation l'un par rapport à l'autre autour d'un axe de rotation (X); a first (2, 102, 202, 302, 402, 502) and a second element (3, 403, 503) rotated relative to each other about an axis of rotation (X);
- au moins un organe de transmission (60, 360, 460, 560) capable, dans une phase de transmission avec amortissement (PI) dans la quelle les premier et second éléments tournent l'un par rapport à l'autre selon l'axe de rotation X, de se déformer et de transmettre un couple entre ces deux éléments, l'amortisseur étant caractérisé en ce qu'il comporte, pour au moins un premier sens de rotation relative (A) des premier et second éléments, un dispositif de fin de course (50a) permettant une mise en butée progressive (Ρ ) entre les premier et second éléments, le dispositif de fin de course comportant un élément déformable (51a, 151, 251a, 351a, 451, 551) doté d'une lame élastique (55a, 155, 255, 355a, 455, 555) agencée pour exercer un effort s 'opposant à la poursuite de la rotation relative des premier et second éléments dans le premier sens de rotation relative (A) lorsque ces éléments viennent en butée progressive. - At least one transmission member (60, 360, 460, 560) capable, in a transmission phase with damping (PI) in which the first and second elements rotate relative to each other along the axis of rotation X, to deform and to transmit a torque between these two elements, the damper being characterized in that it comprises, for at least a first direction of relative rotation (A) of the first and second elements, a device for limit switch (50a) allowing a gradual abutment (Ρ) between the first and second elements, the end-of-stroke device comprising a deformable element (51a, 151, 251a, 351a, 451, 551) with a blade elastic member (55a, 155, 255, 355a, 455, 555) arranged to exert a force opposing the continuation of the relative rotation of the first and second elements in the first relative direction of rotation (A) when these elements abut progressive.
2. Amortisseur selon la revendication précédente dans lequel la lame élastique (55a, 155, 255, 355a, 455, 555) du dispositif de fin de course est distincte de l'organe de transmission (60, 360, 460, 560). 2. Damper according to the preceding claim wherein the elastic blade (55a, 155, 255, 355a, 455, 555) of the end-of-stroke device is distinct from the transmission member (60, 360, 460, 560).
3. Amortisseur selon l'une quelconque des revendications précédentes dans lequel l'élément déformable (51a, 151, 251a, 351a, 451, 551) comporte une attache (56, 156, 256, 356, 456a) montée sur un support (38, 138, 238, 338, 438a, 438b, 538a, 538b) de l'un des premier et second éléments, et Shock absorber according to any one of the preceding claims, in which the deformable element (51a, 151, 251a, 351a, 451, 551) comprises a fastener (56, 156, 256, 356, 456a) mounted on a support (38 , 138, 238, 338, 438a, 438b, 538a, 538b) of one of the first and second elements, and
4. Amortisseur selon l'une quelconque des revendications précédentes dans lequel le dispositif de fin de course comporte en outre un butoir (53a) porté l'autre des premier et second éléments, l'élément déformable et le butoir étant agencés de façon à venir en appui l'un contre l'autre lors de la mise en butée progressive entre les premier et second éléments, dans le premier sens de rotation relative A. 4. Shock absorber according to any one of the preceding claims wherein the end-of-stroke device further comprises a buffer (53a) carried the other of the first and second elements, the deformable element and the stopper being arranged so as to bear against each other during progressive abutment between the first and second elements, in the first direction of relative rotation A.
5. Amortisseur selon la revendication 4 dans lequel la lame élastique (55a, 155, 255, 355a, 455, 555) de l'élément déformable (51a, 151, 251a, 351a,Shock absorber according to Claim 4, in which the elastic blade (55a, 155, 255, 355a, 455, 555) of the deformable element (51a, 151, 251a, 351a,
451, 551) est apte à se déformer sous l'action des efforts exercés par le butoir sur l'élément déformable, de manière à produire la mise en butée progressive entre les premier et second éléments. 451, 551) is able to deform under the action of the forces exerted by the stopper on the deformable element, so as to produce progressive abutment between the first and second elements.
6. Amortisseur selon l'une quelconque des revendications précédentes dans lequel le dispositif de fin de course comporte un élément d'arrêt (57a, 157, 257, 357a, 457a, 557a) agencé pour mettre fin à la déformation de l'élément déformable (51a, 151, 251a, 351a, 451, 551) dans le premier sens de rotation relative et entraîner les premier et second éléments dans une rotation solidaire.  6. Damper according to any one of the preceding claims wherein the end-of-stroke device comprises a stop member (57a, 157, 257, 357a, 457a, 557a) arranged to stop the deformation of the deformable element. (51a, 151, 251a, 351a, 451, 551) in the first direction of relative rotation and driving the first and second elements in a rotation.
7. Amortisseur selon la revendication 6 dans lequel l'élément d'arrêt est agencé sur un élément en saillie (36, 136, 236, 336, 436a, 436a, 536a), par exemple formé dans la masse, de l'un des premier et second éléments. 7. Shock absorber according to claim 6 wherein the stop member is arranged on a projecting element (36, 136, 236, 336, 436a, 436a, 536a), for example formed in the mass, of one of the first and second elements.
8. Amortisseur selon la revendication 3 dans lequel l'attache est montée sur son support avec une possibilité de mouvement circonférentiel et la déformation de l'élément déformable pendant la mise en butée progressive est accompagnée d'un déplacement circonférentiel de l'attache, le butoir venant en appui contre l'attache et poussant circonférentiellement l'attache pour déformer la lame de l'élément déformable lors de la mise en butée progressive. 8. Damper according to claim 3 wherein the fastener is mounted on its support with a possibility of circumferential movement and the deformation of the deformable element during the progressive abutment is accompanied by a circumferential movement of the fastener, the bumper bearing against the fastener and circumferentially pushing the fastener to deform the blade of the deformable element during the progressive abutment.
9. Amortisseur selon l'une des revendications précédentes dans lequel le dispositif de fin de course comporte un absorbeur de choc (375a) agencé sur l'élément déformable (351a) pour absorber les chocs entre l'élément déformable et le butoir lorsque l'élément déformable et le butoir viennent en appui l'un contre l'autre. 9. Damper according to one of the preceding claims wherein the end-of-stroke device comprises a shock absorber (375a) arranged on the deformable element (351a) to absorb shocks between the deformable element and the bumper when the deformable element and the bumper come to bear against each other.
10. Amortisseur selon l'une des revendications 6 et 7 combinées à l'une des revendications 4, 5, 8 et 9 dans lequel le dispositif de fin de course (250) est agencé de telle sorte que le butoir vienne s'appuyer directement contre l'élément d'arrêt (257) dans la phase de rotation solidaire. 10. Shock absorber according to one of claims 6 and 7 combined with one of claims 4, 5, 8 and 9 wherein the end-of-stroke device (250) is arranged so that the bumper comes to bear directly against the stop element (257) in the integral rotation phase.
11. Amortisseur selon l'une quelconque des revendications précédentes dans lequel l'amortisseur comporte en outre un dispositif de fin de course opposé agencé pour permettre une mise en butée progressive entre les premier et second éléments, dans un second sens de rotation relative (B) des premier et second éléments, opposé au premier sens de rotation relative. 11. Damper according to any one of the preceding claims wherein the damper further comprises an opposite end-of-travel device arranged to allow a progressive abutment between the first and second elements, in a second direction of relative rotation (B ) first and second elements, opposite to the first direction of relative rotation.
12. Amortisseur selon la revendication précédente dans lequel le dispositif de fin de course opposé comporte un élément déformable opposé (51b, 351b, 451b, 551b) agencée pour se déformer dans le second sens de rotation relative. 12. Damper according to the preceding claim wherein the opposite end of travel device comprises an opposite deformable element (51b, 351b, 451b, 551b) arranged to deform in the second direction of relative rotation.
13. Amortisseur selon la revendication précédente dans lequel l'élément déformable (51a, 351a, 451a, 551a) et l'élément déformable opposé (51b, 351b, 451b, 551b) sont formés sur une même pièce. 13. Shock absorber according to the preceding claim wherein the deformable element (51a, 351a, 451a, 551a) and the opposite deformable element (51b, 351b, 451b, 551b) are formed on the same part.
14. Amortisseur selon l'une quelconque des revendications précédentes dans lequel l'organe de transmission comporte au moins un bras élastique (61a, 61b, 461, 561) capable de fléchir et transmettre un couple entre les premier et second éléments, la flexion du bras élastique étant, dans la première phase de transmission (PI), accompagnée d'une rotation relative entre le premier et le second élément selon l'axe de rotation X, chaque bras élastique étant porté par l'un des premier et second éléments et chaque bras élastique étant pourvu d'une surface de came (20) coopérant avec un suiveur de came (21, 121, 221, 321) porté par l'autre desdits premier et second éléments. 14. Damper according to any one of the preceding claims wherein the transmission member comprises at least one elastic arm (61a, 61b, 461, 561) capable of bending and transmitting a torque between the first and second elements, bending the elastic arm being, in the first transmission phase (PI), accompanied by a relative rotation between the first and the second element along the axis of rotation X, each elastic arm being carried by one of the first and second elements and each resilient arm being provided with a cam surface (20) cooperating with a cam follower (21, 121, 221, 321) carried by the other of said first and second members.
15. Amortisseur selon la revendication précédente dans lequel le suiveur de came et l'élément déformable sont portés par le même premier ou second élément. 15. Damper according to the preceding claim wherein the cam follower and the deformable element are carried by the same first or second element.
16. Amortisseur selon l'une des revendications 15 à 16 dans lequel le suiveur de came comporte un galet agencé pour rouler sur la surface de came du bras élastique, le galet étant logé dans un logement (59, 159, 259, 359) bordé, au moins en partie, par le support (38, 138) de l'élément déformable. 16. Shock absorber according to one of claims 15 to 16 wherein the cam follower comprises a roller arranged to roll on the cam surface of the elastic arm, the roller being housed in a housing (59, 159, 259, 359) lined at least in part by the support (38, 138) of the deformable element.
17. Amortisseur selon l'une des revendications 14 à 16, en combinaison avec l'une des revendications 12 à 13 dans lequel l'élément déformable et l'élément déformables opposés sont disposés, circonférentiellement, de part et d'autre du suiveur de came. 17. Shock absorber according to one of claims 14 to 16, in combination with one of claims 12 to 13 wherein the deformable element and the opposite deformable element are arranged, circumferentially, on either side of the follower of cam.
18. Amortisseur selon l'une quelconque des revendications précédentes dans lequel le dispositif de fin de course est agencé de sorte que : la mise en butée progressive commence lorsque le couple transmis par l'amortisseur dépasse un premier seuil de couple, Shock absorber according to any one of the preceding claims, in which the end-of-stroke device is arranged such that: the progressive abutment begins when the torque transmitted by the damper exceeds a first torque threshold,
la mise en rotation solidaire commence lorsque le couple transmis par l'amortisseur dépasse un second seuil de couple, le second seuil de couple étant supérieur au premier seuil de couple,  the solid rotation starts when the torque transmitted by the damper exceeds a second torque threshold, the second torque threshold being greater than the first torque threshold,
lors de la phase de rotation solidaire des premier et second éléments empêchant toute rotation relative supplémentaire entre les premier et second éléments dans le premier sens de rotation relative, la lame élastique de l'élément déformable (51a, 351a, 451a, 551a) reste déformée et exerce un effort de rappel élastique sur le butoir apte à faire tourner les premier et second éléments dans le sens opposé au premier sens de rotation relative lorsque le couple transmis entre les premier et second éléments devient inférieur au second seuil de couple.  during the phase of integral rotation of the first and second elements preventing any additional relative rotation between the first and second elements in the first direction of relative rotation, the elastic blade of the deformable element (51a, 351a, 451a, 551a) remains deformed and exerts an elastic return force on the stopper capable of rotating the first and second elements in the opposite direction to the first relative direction of rotation when the torque transmitted between the first and second elements becomes lower than the second torque threshold.
19. Amortisseur selon l'une quelconque des revendications précédentes dans lequel le dispositif de fin de course est agencé de sorte que la portion de l'élément déformable (51a, 351a, 451a, 551a) contre laquelle s'appuie le butoir (53a) est poussé circonférenciellement par le butoir lors de la phase de mise en butée progressive. 19. Shock absorber according to any one of the preceding claims wherein the end-of-stroke device is arranged so that the portion of the deformable element (51a, 351a, 451a, 551a) against which the stopper (53a) rests is pushed circumferentially by the stopper during the phase of progressive abutment.
20. Amortisseur selon l'une quelconque des revendications précédentes dans lequel l'élément déformable (51a, 351a, 451a, 551a) est agencé de façon à frotter contre ledit un des premier et second élément qui le porte lors de la phase de mise en butée progressive. 20. Shock absorber according to any one of the preceding claims wherein the deformable element (51a, 351a, 451a, 551a) is arranged to rub against said one of the first and second element which carries it during the implementation phase. progressive stop.
PCT/EP2017/055610 2016-03-09 2017-03-09 Torsion damper, in particular for a motor vehicle clutch WO2017153549A1 (en)

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FR1651983A FR3048745B1 (en) 2016-03-09 2016-03-09 DAMPER, IN PARTICULAR FOR A CLUTCH OF A MOTOR VEHICLE
FR1651983 2016-03-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075295A1 (en) * 2017-12-15 2019-06-21 Valeo Embrayages TORSION DAMPER WITH FLEXIBLE BLADES
FR3075906A1 (en) * 2017-12-22 2019-06-28 Valeo Embrayages TORSION DAMPER COMPRISING A HYSTERESIS SYSTEM

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Publication number Priority date Publication date Assignee Title
FR2862730A1 (en) * 2003-11-24 2005-05-27 Valeo Embrayages Vibration damper for motor vehicles torque transmission device, has two flywheels, and springs including leaves integrated at their one end to one flywheel and linked at their other end to another flywheel by links
DE102008018218A1 (en) * 2007-05-07 2008-11-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Divided flywheel, for an internal combustion motor, has a secondary inertia mass with springs and a primary limit working with an overload safety unit
FR3008152A1 (en) 2013-07-08 2015-01-09 Valeo Embrayages DOUBLE FLYWHEEL DAMPER WITH IMPROVED AMORTIZATION MEANS
DE102014223874A1 (en) * 2014-01-14 2015-07-16 Schaeffler Technologies AG & Co. KG torsional vibration dampers
FR3031365A1 (en) * 2015-01-07 2016-07-08 Valeo Embrayages DAMPER, IN PARTICULAR FOR A CLUTCH OF A MOTOR VEHICLE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2862730A1 (en) * 2003-11-24 2005-05-27 Valeo Embrayages Vibration damper for motor vehicles torque transmission device, has two flywheels, and springs including leaves integrated at their one end to one flywheel and linked at their other end to another flywheel by links
DE102008018218A1 (en) * 2007-05-07 2008-11-13 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Divided flywheel, for an internal combustion motor, has a secondary inertia mass with springs and a primary limit working with an overload safety unit
FR3008152A1 (en) 2013-07-08 2015-01-09 Valeo Embrayages DOUBLE FLYWHEEL DAMPER WITH IMPROVED AMORTIZATION MEANS
DE102014223874A1 (en) * 2014-01-14 2015-07-16 Schaeffler Technologies AG & Co. KG torsional vibration dampers
FR3031365A1 (en) * 2015-01-07 2016-07-08 Valeo Embrayages DAMPER, IN PARTICULAR FOR A CLUTCH OF A MOTOR VEHICLE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3075295A1 (en) * 2017-12-15 2019-06-21 Valeo Embrayages TORSION DAMPER WITH FLEXIBLE BLADES
FR3075906A1 (en) * 2017-12-22 2019-06-28 Valeo Embrayages TORSION DAMPER COMPRISING A HYSTERESIS SYSTEM

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FR3048745A1 (en) 2017-09-15

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