WO2016156726A1 - Motor vehicle torque transmission device - Google Patents

Motor vehicle torque transmission device Download PDF

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Publication number
WO2016156726A1
WO2016156726A1 PCT/FR2016/050695 FR2016050695W WO2016156726A1 WO 2016156726 A1 WO2016156726 A1 WO 2016156726A1 FR 2016050695 W FR2016050695 W FR 2016050695W WO 2016156726 A1 WO2016156726 A1 WO 2016156726A1
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WO
WIPO (PCT)
Prior art keywords
torque
support
input
elastic members
radially
Prior art date
Application number
PCT/FR2016/050695
Other languages
French (fr)
Inventor
Michaël Hennebelle
Roel Verhoog
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
Priority to KR1020177026779A priority Critical patent/KR20170131839A/en
Priority to DE112016001539.9T priority patent/DE112016001539T5/en
Publication of WO2016156726A1 publication Critical patent/WO2016156726A1/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
    • F16F15/121—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 using springs as elastic members, e.g. metallic springs
    • F16F15/1217—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
    • F16F15/121—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 using springs as elastic members, e.g. metallic springs
    • F16F15/123—Wound springs
    • F16F15/12353—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations
    • F16F15/1236—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates
    • F16F15/12366—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates acting on multiple sets of springs
    • F16F15/12373—Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations resulting in a staged spring characteristic, e.g. with multiple intermediate plates acting on multiple sets of springs the sets of springs being arranged at substantially the same radius
    • 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
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range

Definitions

  • the present invention relates to a torque transmission device for a motor vehicle.
  • Such a device generally comprises a torque input element intended to be coupled directly or indirectly to a crankshaft, a torque output element intended to be coupled to an input shaft of a gearbox, and a first group of resilient members mounted between the input and torque output members and acting against rotation of one of said input and torque output members relative to the other.
  • the torque transmission device When the torque transmission device is LTD (Long Travel Damper) type, it comprises several pairs of elastic members, the elastic members of the same pair being arranged in series via a phasing member so the elastic members of each group deform in phase with each other.
  • a second group of elastic members mounted with clearance between the input and torque output elements, in parallel with the first group of members. resilient and adapted to act against the rotation of one of said input elements over a limited angular range, particularly at the end of the angular stroke.
  • the second group of elastic members makes it possible to increase the stiffness of the damping device at the end of the angular stroke, that is to say for a significant angular offset of the torque entry element with respect to the torque output element (or vice versa).
  • Document US 2010/0133063 discloses a LTD type torque transmission device comprising two groups of elastic members arranged in parallel, the second group being made active only at the end of angular travel a of the torque input element. relative to the torque output element (or vice versa).
  • An internal combustion engine generates acyclisms because of the successive explosions in the cylinders of the engine, these acyclisms varying in particular as a function of the number of cylinders.
  • a damping device is generally equipped with friction elements which, in combination with the circumferential action springs, allow filtering of the vibrations due to the rotational acyclisms of the motor. This prevents such vibrations pass into the gearbox and cause shock, noise and unwanted noise.
  • the patent application FR 2 981 714 discloses a pendular damping device comprising an annular support intended to be rotated about its axis and pendular masses mounted at the outer periphery of the support.
  • Each mass is driven in a pendulum movement in operation and comprises two parts, mounted axially on either side of the support and connected by three spacers each through an opening of the support.
  • a roller is mounted between a raceway formed in each spacer and the edge of the corresponding opening of the support. The spacers are attached to both parts of the mass by riveting.
  • each mass moves in such a way that its center of gravity oscillates in a pendulum fashion.
  • the oscillation frequency of each mass is proportional to the speed of rotation of the motor shaft, the corresponding multiple may for example take a value close to the rank of the overriding harmonic vibrations responsible for high irregularities of rotation in the vicinity of the idle.
  • this set Due to the large mass of the assembly formed by the support and the associated masses, this set has a significant inertia.
  • This support may be connected to the torque input element, to the torque output element or to the phasing member of a LTD damping device,
  • a high inertia of the aforementioned assembly can fully compress all or part of the elastic members, both in the direction of rotation said direct direction in the opposite direction of rotation, said retro direction.
  • the forward direction corresponds to the case of operation in which torque is transmitted from the torque input member to the torque output member.
  • a resisting torque is transmitted from the torque output member to the torque input member, which may cause rotation of the phasing organ in the retro direction.
  • the elastic members are helical compression springs
  • excessive compression of these springs can cause the turns to contact each other.
  • the turns are then called joined. If the transmitted torque is important, the turns are crushed causing fatigue and premature wear of the springs.
  • the invention aims in particular to provide a simple, effective and economical solution to this problem.
  • the invention proposes a torque transmission device for a motor vehicle, comprising a torque input element intended to be coupled to a motor shaft, and a torque output element, intended to be coupled to a motor.
  • input shaft of a gearbox resilient members acting against the rotation of one of the input and output elements relative to the other and pendular damping means comprising a movable support on which pendulum masses are mounted in a movable manner, characterized in that said support comprises stop means able to cooperate with abutment means complementary to the torque input element, respectively of the torque output member, so as to limit the relative rotation of said support relative to the torque input member, respectively the relative rotation of said support relative to the torque output member.
  • the abutment means being located on the movable support, they can be located radially opposite the elastic members for example.
  • the radial size of the device can be reduced.
  • the device may comprise at least one group of elastic members mounted between the input and torque output elements, the elastic members of this group being arranged in series via a phasing member, so that the elastic members of each group deform in phase with each other.
  • the torque transmission device is then of type LTD
  • the support can be rotatably coupled to the phasing member.
  • the resilient members of the or each group may bear, on the one hand, on an annular web and, on the other hand, on two guide washers which extend radially on either side of the web. annular and which are rotatable relative to the latter.
  • the guide washers may belong to the torque input member, the annular web belonging to the torque output member
  • At least one of the guide washers may comprise at least one window located circumferentially facing at least one resilient member, the complementary abutment means being formed by at least one of the circumferential ends of said window.
  • the support of the moving masses may then comprise an annular portion from which at least one abutment zone extends radially inwards, said abutment zone being able to bear on at least one of the circumferential ends of the abutment. said window.
  • At least one of the guide washers may comprise a radially inner annular portion and a radially outer annular portion, axially offset relative to one another, the window being located radially between said inner and outer annular portions.
  • the torque input means or the torque output means may comprise a hub comprising a radially extending annular portion in which is formed at least one arcuate oblong opening. circle, the support of the pendular masses comprising at least one axially extending pin, engaged in said opening, the angular displacement of said support relative to the hub being limited by abutment of said stud on the circumferential ends of the oblong opening.
  • Said stud may be formed by a rivet.
  • the hub may comprise a grooved cylindrical portion from which the annular portion comprising the oblong opening extends radially inwards.
  • the hub can be fixed, for example by riveting, to one of the guide washers.
  • the angular displacement between the pendular mass support on the one hand, and the torque input element, respectively the torque output element, on the other hand, can be between 1 and 30 °, preferably between 5 and 30 °.
  • the torque transmission device may also include at least one of the following features:
  • the pendulum masses are mounted at the radially outer periphery of the support.
  • the support is coupled in rotation to the phasing member, by means of spacers,
  • said spacers are riveted to the support and to the phasing member
  • the device comprises a hub, radially internal, intended to be coupled to an input shaft of a gearbox,
  • said hub is coupled in rotation to the annular web
  • the device comprises a first group of elastic members mounted between the input and torque output elements, designed to act against the rotation of one of said input or torque output elements, during the rotating one of said input or torque output members relative to the other over a first determined angular range, and a second group of resilient members, mounted with clearance between the input and output elements of torque, in parallel with the first group of elastic members and designed to act against the rotation of one of said input or torque output members, over a second defined angular range, less than the first angular range.
  • the elastic members of the second group are housed, at least in part, in a housing of the first radially inner hub.
  • FIGS. 1 to 6 show a torque transmission device according to a first embodiment of the invention, in which:
  • FIG. 1 is a schematic view of a torque converter equipped with a torque transmission device according to the invention
  • FIG. 2 is a perspective view, from the front, of the device
  • FIG. 3 is a perspective view from the rear of the device
  • FIG. 4 is a view corresponding to FIG. 3, in which the corrugated hub is not shown,
  • FIG. 5 is a front view of the device, in a so-called rest position
  • FIG. 6 is a view corresponding to FIG. 5, in an abutment position
  • FIGS. 7 to 9 show a torque transmission device according to a second embodiment of the invention, in which:
  • FIG. 7 is a front view of the device, in a so-called rest position
  • FIG. 8 is a half-sectional view along the line VIII-VIII of FIG. 7,
  • Figure 9 is a perspective view from the rear of the device.
  • Figures 1 to 6 show a torque transmission device according to a first embodiment of the invention.
  • a hydrodynamic torque converter according to the invention is shown schematically and partially in FIG.
  • This converter makes it possible to transmit a torque of an output shaft of an internal combustion engine of a motor vehicle, such as for example a crankshaft 1, to an input shaft 2 of a gearbox.
  • the torque converter conventionally comprises an impeller impeller 3 capable of hydrokinetically driving a turbine blade wheel 4 via a reactor 5.
  • the impeller wheel 3 is coupled to the crankshaft 1 and the turbine wheel 4 is coupled to a turbine hub 6, itself coupled to two guide washers 7, hereinafter referred to respectively as the rear guide washer 7a and the washer front guide 7b.
  • the front guide ring 7b and the turbine hub 6 are rotatably mounted about a central hub groove 8, to be coupled to the input shaft 2 of the gearbox.
  • the front guide ring 7a is mounted around the turbine hub 6 and fixed thereto by means of pins 6a ( Figure 2).
  • the two guide washers 7a, 7b extend radially and delimit between them an internal space 9 ( Figure 8) accommodating elastic members 10a, 10b of a first group, which are for example helical compression springs.
  • Each member 10a, 10b may be composed of two concentric helical springs.
  • the rear guide washer 7b has a cylindrical rim January 1 at its radially outer periphery, extending towards the front guide ring 7a and fixed thereto.
  • the free end of the cylindrical flange 1 1 comprises tongues 12 (Figure 2) extending axially, before fixing the two guide rings 7a, 7b therebetween.
  • These tabs 12 are engaged in openings 13 of the front guide ring 7a and are folded during a riveting operation, and can be welded thereto, so as to ensure the attachment of the two guide rings 7a, 7b.
  • the guide washers 7a, 7b conventionally comprise windows 14 for accommodating the elastic members 10a, 10b.
  • each guide washer 7a, 7b has a radially inner portion 15 and a radially outer portion 16 connected to each other by radial tabs 17, the lateral edges of said radial tabs 17 forming the circumferential ends 18 of the windows .
  • each tab 17 is axially curved so as to connect the two aforementioned parts 15, 16
  • the radially inner portions 15 of the two guide washers 7a, 7b are further spaced from one another than the radially outer portions 16 of said guide washers 7a, 7b.
  • each lug 17 has, at its end connected to the radially inner portion, a flat zone 19 located substantially in the radial plane of the radially inner portion 15.
  • a splined hub 20 is also fixed by riveting on the rear face of the rear guide washer 7b.
  • This corrugated hub 20 has a radial portion 21 fixed on said rear face of the rear guide washer 7b, and a fluted cylindrical flange 22 extending rearwardly from the radially outer periphery of the radial portion 21.
  • a clutch 23 (FIG. 1) makes it possible to transmit a torque from the crankshaft 1 to the guide washers 7, in a determined operating phase, without involving the impeller wheel 3 and the turbine wheel 4.
  • This clutch 23 comprises an element input 24 coupled to the crankshaft 1 and an output member 25, including the splined hub 20.
  • a radially extending annular web 26 is mounted in the internal space 9 delimited between the guide washers 7a, 7b and is fixed on the central hub 8, for example by means of rivets.
  • the annular web 26 comprises for example a radially inner annular portion from which tabs, for example three in number, extend radially outwardly.
  • Each lug comprises two opposite faces serving to support the resilient members 10a, 10b, inclined with respect to each other and with respect to the radial direction.
  • the elastic members of the first group 10a, 10b are circumferentially mounted between the annular web 26 and the guide washers 7a, 7b.
  • the elastic members 10a, 10b are arranged in pairs.
  • the elastic members 10a, 10b of the same pair are arranged in series via a common phasing member 27, so that the elastic members 10a, 10b deform in phase with each other.
  • the torque converter comprises three pairs of elastic members 10a, 10b.
  • one of the elastic members (for example 10a) is intended to bear, on the one hand, on the corresponding end 18 of the windows 14 of the guide washers 7a, 7b and, on the other hand, on the phasing member 27.
  • the other elastic member (for example 10b) is then intended to bear, on the one hand, on the phasing member 27 and, on the other hand, on one of the faces of the corresponding tab of the annular web 26.
  • the phasing member 27 is visible only partially and has an annular portion from which lugs 28 extend radially inward (Figure 2).
  • Each lug 28 has two opposite faces 29 serving to support the elastic members 10a, 10b, inclined with respect to each other and with respect to the radial direction.
  • the device further comprises pendular masses 30 mounted movably at the radially outer periphery of an annular support 31.
  • Said support 31 comprises an annular portion 32 from which abutment zones 33, here three in number, extend radially inwards.
  • Each abutment zone 33 is located opposite one of the windows 14 of the rear guide washer 7b and has two lateral edges equipped with studs 34 of rounded section, able to bear against the circumferential ends 18 of the corresponding window. 14.
  • the pads 34 are able to bear on the lateral edges 18 of the plane zones 19 of the radial tabs 17 of the guide ring 7b.
  • the pads 34 extend in the plane of the support 31.
  • the abutment zones 33 are also connected to the phasing member 27 via spacers 35, which can be riveted.
  • the pendular masses 30 are movably mounted on the support 31 by means of rollers 36 (partially visible in FIG. 5) and spacers 37, as is known per se, these masses 30 being intended to improve the filtration of vibrations and rotational acyclisms.
  • the device further comprises a second group of elastic members 38 (FIGS. 1 and 8) in the form of helical compression springs and partly mounted in an annular recess 39 of the hub 8 and, in part, in a annular housing 40 of the hub 6.
  • the housing 39 of the hub 8 opens axially rearwardly and the housing 40 of the hub 6 opens axially forwardly.
  • Each elastic member 38 of the second group comprises a first end intended to bear against an abutment of the hub 6 and a second end intended to bear against an abutment of the hub 8, or vice versa, depending on the direction of rotation of the torque input element (including guide washers 7a, 7b and the hub 6) relative to the torque output member (including in particular the web 26 and the hub 8).
  • the elastic members 38 of the second group are mounted with a circumferential clearance between the ends of said elastic members 38 and the abutments of the hubs 6, 8. This circumferential clearance is noted j in Figure 1.
  • the guide washers 7a, 7b and the hub 6 pivot relatively relative to the web and the hub 8, an angle a (in the forward direction or in the retro direction).
  • the elastic members 38 of the second group act in parallel elastic members 10a, 10b of the first group.
  • FIG. 5 Such a position is illustrated in FIG. 5. It can be seen that, in this position, the pads 34 of the abutment zones 33 do not bear against the circumferential ends 18 of the windows 14 of the guide ring 7b.
  • the abutment zones 33, the pads 34 and the windows 14 are positioned and dimensioned so as to limit the compression of the elastic members 10a, 10b and avoid, when it comes to coil springs, that the turns of the springs are contiguous when compression, both in the direction of rotation said direct direction in the opposite direction of rotation, said retro direction.
  • the direct meaning corresponds to the case in which torque is transmitted from the torque input member to the torque output member. In certain phases of operation, for example when the user abruptly removes his foot from the accelerator, a resisting torque is transmitted from the torque output member to the torque input member, which may cause rotation of the phasing member 27 in the retro direction.
  • the total angular displacement of the support 31 and the phasing member 27 relative to the guide washers 7a, 7b is for example between 1 and 30 °, preferably between 5 and 30 °.
  • FIG. 6 represents an abutment position of the support 31 with respect to the guide washer 7b, in the case where the support 31 pivots in the direct direction with respect to the guide washers 7a, 7b.
  • the pads 34 bear against the corresponding circumferential ends 18 of the windows 14 of the guide washer 7b.
  • Figures 7 to 9 show a second embodiment of the invention.
  • the support 31 of the pendular masses 30 is, as previously, rotatably coupled to the phasing member 27, the radially inner periphery of said support comprising studs 41, formed for example by rivets, here at the number of three and extending axially.
  • the studs 41 are engaged in oblong apertures 42 in the shape of a circular arc formed in the radial portion 21 of the corrugated hub 20.
  • the pads 41 and the openings 42 are positioned and dimensioned so as to limit the angular displacement of the support 31 and the phasing member 27, on the one hand, with respect to the splined hub 20 and the guide washers 7a, 7b, on the other hand, by abutment or support of said pads 41 on the circumferential ends 43 of the oblong openings 42.
  • the total angular displacement of the support 31 and the phasing member 27 relative to the washers of 7a, 7b and the hub spline 20 is for example between 1 and 30 °, preferably between 5 and 30 °.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention relates to a motor vehicle torque transmission device comprising: a torque input element (7b), intended to be engaged with a drive shaft, and a torque output element (8), intended to be engaged with a gearbox input shaft; resilient members acting counter to the rotation of one of the input and output elements relative to the other; and a pendulum damping means comprising a movable mounting (31) on which pendulum weights (30) are movably mounted. Said device is characterised in that said mounting (31) comprises an abutment means (34) capable of engaging with a complementary means (18) for abutting, respectively, the torque input element (7b) and the torque output element so as to limit, respectively, the relative rotation of said mounting (31) in relation to the torque input element (7b) and the relative rotation of said mounting (31) in relation to the torque output element.

Description

Dispositif de transmission de couple pour un véhicule automobile  Torque transmission device for a motor vehicle
La présente invention concerne un dispositif de transmission de couple pour un véhicule automobile. The present invention relates to a torque transmission device for a motor vehicle.
Un tel dispositif comporte de façon générale un élément d'entrée de couple, destiné à être couplé directement ou indirectement à un vilebrequin, un élément de sortie de couple destiné à être couplé à un arbre d'entrée d'une boîte de vitesses, et un premier groupe d'organes élastiques montés entre les éléments d'entrée et de sortie de couple et agissant à encontre de la rotation de l'un desdits éléments d'entrée et de sortie de couple par rapport à l'autre.  Such a device generally comprises a torque input element intended to be coupled directly or indirectly to a crankshaft, a torque output element intended to be coupled to an input shaft of a gearbox, and a first group of resilient members mounted between the input and torque output members and acting against rotation of one of said input and torque output members relative to the other.
Lorsque le dispositif de transmission de couple est de type LTD (Long Travel Damper), il comprend plusieurs paires d'organes élastiques, les organes élastiques d'une même paire étant agencés en série par l'intermédiaire d'un organe de phasage de façon à ce que les organes élastiques de chaque groupe se déforment en phase les uns avec les autres.  When the torque transmission device is LTD (Long Travel Damper) type, it comprises several pairs of elastic members, the elastic members of the same pair being arranged in series via a phasing member so the elastic members of each group deform in phase with each other.
Afin de permettre l'amortissement de couples importants, il est connu d'ajouter au dispositif précité un second groupe d'organes élastiques, montés avec jeu entre les éléments d'entrée et de sortie de couple, en parallèle du premier groupe d'organes élastiques et conçus pour agir à encontre de la rotation de l'un desdits éléments d'entrée sur une plage angulaire limitée, en particulier en fin de course angulaire. La course angulaire, ou le décalage angulaire noté a, de l'élément d'entrée de couple par rapport à l'élément de sortie de couple, est définie par rapport à une position de repos (a=0) dans laquelle aucun couple n'est transmis au travers du dispositif.  In order to allow the damping of large torques, it is known to add to the aforementioned device a second group of elastic members, mounted with clearance between the input and torque output elements, in parallel with the first group of members. resilient and adapted to act against the rotation of one of said input elements over a limited angular range, particularly at the end of the angular stroke. The angular displacement, or the angular offset noted a, of the torque input element with respect to the torque output element, is defined with respect to a rest position (a = 0) in which no torque is transmitted through the device.
Le second groupe d'organes élastiques permet d'augmenter la raideur du dispositif d'amortissement en fin de course angulaire, c'est-à- dire pour un décalage angulaire a important de l'élément d'entrée de couple par rapport à l'élément de sortie de couple (ou inversement). Le document US 2010/0133063 divulgue un dispositif de transmission de couple de type LTD, comportant deux groupes d'organes élastiques agencés en parallèle, le second groupe étant rendu actif uniquement en fin de course angulaire a de l'élément d'entrée de couple par rapport à l'élément de sortie de couple (ou inversement). The second group of elastic members makes it possible to increase the stiffness of the damping device at the end of the angular stroke, that is to say for a significant angular offset of the torque entry element with respect to the torque output element (or vice versa). Document US 2010/0133063 discloses a LTD type torque transmission device comprising two groups of elastic members arranged in parallel, the second group being made active only at the end of angular travel a of the torque input element. relative to the torque output element (or vice versa).
Un moteur à explosion génère des acyclismes du fait des explosions se succédant dans les cylindres du moteur, ces acyclismes variant notamment en fonction du nombre de cylindres.  An internal combustion engine generates acyclisms because of the successive explosions in the cylinders of the engine, these acyclisms varying in particular as a function of the number of cylinders.
Un dispositif d'amortissement est généralement équipé d'éléments de friction qui, en combinaison avec les ressorts à action circonférentielle, permettent de filtrer les vibrations dues aux acyclismes de rotation du moteur. Cela permet d'éviter que de telles vibrations passent dans la boîte de vitesses et y provoquent des chocs, bruits et nuisances sonores indésirables.  A damping device is generally equipped with friction elements which, in combination with the circumferential action springs, allow filtering of the vibrations due to the rotational acyclisms of the motor. This prevents such vibrations pass into the gearbox and cause shock, noise and unwanted noise.
Afin d'améliorer encore la filtration, il est connu d'utiliser un dispositif d'amortissement pendulaire, en plus du système d'amortissement usuel.  In order to further improve the filtration, it is known to use a pendulum damping device, in addition to the usual damping system.
La demande de brevet FR 2 981 714, au nom de la Demanderesse, divulgue un dispositif d'amortissement pendulaire comportant un support annulaire destiné à être entraîné en rotation autour de son axe et des masses pendulaires montées en périphérie externe du support. Chaque masse est animée d'un mouvement pendulaire en fonctionnement et comporte deux parties, montées axialement de part et d'autre du support et reliées par trois entretoises traversant chacune une ouverture du support. Un rouleau est monté entre une piste de roulement ménagée dans chaque entretoise et le bord de l'ouverture correspondante du support. Les entretoises sont fixées aux deux parties de la masse par rivetage.  The patent application FR 2 981 714, in the name of the Applicant, discloses a pendular damping device comprising an annular support intended to be rotated about its axis and pendular masses mounted at the outer periphery of the support. Each mass is driven in a pendulum movement in operation and comprises two parts, mounted axially on either side of the support and connected by three spacers each through an opening of the support. A roller is mounted between a raceway formed in each spacer and the edge of the corresponding opening of the support. The spacers are attached to both parts of the mass by riveting.
En réaction aux irrégularités ou acyclismes de rotation, chaque masse se déplace de manière à ce que son centre de gravité oscille de façon pendulaire. La fréquence d'oscillation de chaque masse est proportionnelle à la vitesse de rotation de l'arbre moteur, le multiple correspondant pouvant par exemple prendre une valeur proche du rang de l'harmonique prépondérant des vibrations responsables des fortes irrégularités de rotation au voisinage du ralenti. In response to rotational irregularities or acyclisms, each mass moves in such a way that its center of gravity oscillates in a pendulum fashion. The oscillation frequency of each mass is proportional to the speed of rotation of the motor shaft, the corresponding multiple may for example take a value close to the rank of the overriding harmonic vibrations responsible for high irregularities of rotation in the vicinity of the idle.
Du fait de la masse importante de l'ensemble constitué par le support et les masses associées, cet ensemble présente une inertie importante.  Due to the large mass of the assembly formed by the support and the associated masses, this set has a significant inertia.
Ce support peut être relié à l'élément d'entrée de couple, à l'élément de sortie de couple ou encore à l'organe de phasage d'un dispositif d'amortissement de type LTD,  This support may be connected to the torque input element, to the torque output element or to the phasing member of a LTD damping device,
Une forte inertie de l'ensemble précité peut comprimer intégralement tout ou partie des organes élastiques, aussi bien dans le sens de rotation dit sens direct que dans le sens de rotation opposé, dit sens rétro. Le sens direct correspond au cas de fonctionnement dans lequel du couple est transmis de l'élément d'entrée de couple vers l'élément de sortie de couple. Dans certaines phases de fonctionnement, par exemple lorsque l'utilisateur retire brusquement son pied de l'accélérateur, un couple résistant est transmis de l'élément de sortie de couple vers l'élément d'entrée de couple, ce qui peut provoquer une rotation de l'organe de phasage dans le sens rétro.  A high inertia of the aforementioned assembly can fully compress all or part of the elastic members, both in the direction of rotation said direct direction in the opposite direction of rotation, said retro direction. The forward direction corresponds to the case of operation in which torque is transmitted from the torque input member to the torque output member. In certain phases of operation, for example when the user abruptly removes his foot from the accelerator, a resisting torque is transmitted from the torque output member to the torque input member, which may cause rotation of the phasing organ in the retro direction.
Lorsque les organes élastiques sont des ressorts hélicoïdaux de compression, une trop forte compression de ces ressorts peut amener les spires au contact les unes des autres. Les spires sont alors dites jointives. Si le couple transmis est important, les spires subissent un écrasement provoquant une fatigue et une usure prématurée des ressorts.  When the elastic members are helical compression springs, excessive compression of these springs can cause the turns to contact each other. The turns are then called joined. If the transmitted torque is important, the turns are crushed causing fatigue and premature wear of the springs.
D'une manière générale, il est nécessaire de pouvoir limiter les débattements angulaires entre tout ou partie des éléments mobiles du dispositif de transmission de couple.  In general, it is necessary to be able to limit the angular deflections between all or part of the moving elements of the torque transmission device.
A cet effet, il a été envisagé de prévoir des moyens de butée complémentaires entre l'organe de phasage et des rondelles de guidage appartenant à l'élément d'entrée de couple, ces moyens de butée complémentaires étant situés radialement à l'extérieur des différents organes élastiques. For this purpose, it has been envisaged to provide complementary abutment means between the phasing member and guide washers belonging to the torque input element, these abutment means complementary being located radially outside the various elastic members.
Il existe actuellement un besoin de réduire l'encombrement radial d'un tel dispositif de transmission de couple.  There is currently a need to reduce the radial size of such a torque transmission device.
L'invention a notamment pour but d'apporter une solution simple, efficace et économique à ce problème.  The invention aims in particular to provide a simple, effective and economical solution to this problem.
A cet effet, l'invention propose un dispositif de transmission de couple pour un véhicule automobile, comportant un élément d'entrée de couple destiné à être couplé à un arbre moteur, et un élément de sortie de couple, destiné à être couplé à un arbre d'entrée d'une boîte de vitesses, des organes élastiques agissant à encontre de la rotation de l'un des éléments d'entrée et de sortie par rapport à l'autre et des moyens d'amortissement pendulaires comportant un support mobile sur lequel des masses pendulaires sont montées de façon mobile, caractérisé en ce que ledit support comporte des moyens de butée aptes à coopérer avec des moyens de butée complémentaires de l'élément d'entrée de couple, respectivement de l'élément de sortie de couple, de façon à limiter la rotation relative dudit support par rapport à l'élément d'entrée de couple, respectivement la rotation relative dudit support par rapport à l'élément de sortie de couple.  For this purpose, the invention proposes a torque transmission device for a motor vehicle, comprising a torque input element intended to be coupled to a motor shaft, and a torque output element, intended to be coupled to a motor. input shaft of a gearbox, resilient members acting against the rotation of one of the input and output elements relative to the other and pendular damping means comprising a movable support on which pendulum masses are mounted in a movable manner, characterized in that said support comprises stop means able to cooperate with abutment means complementary to the torque input element, respectively of the torque output member, so as to limit the relative rotation of said support relative to the torque input member, respectively the relative rotation of said support relative to the torque output member.
Les moyens de butée étant situés sur le support mobile, ceux- ci peuvent être situés radialement en regard des organes élastiques par exemple. L'encombrement radial du dispositif peut donc être réduit.  The abutment means being located on the movable support, they can be located radially opposite the elastic members for example. The radial size of the device can be reduced.
De plus, le dispositif peut comporter au moins un groupe d'organes élastiques monté entre les éléments d'entrée et de sortie de couple, les organes élastiques de ce groupe étant agencés en série par l'intermédiaire d'un organe de phasage, de façon à ce que les organes élastiques de chaque groupe se déforment en phase les uns avec les autres.  In addition, the device may comprise at least one group of elastic members mounted between the input and torque output elements, the elastic members of this group being arranged in series via a phasing member, so that the elastic members of each group deform in phase with each other.
Le dispositif de transmission de couple est alors de type LTD The torque transmission device is then of type LTD
(Long Travel Damper). Le support peut être couplé en rotation à l'organe de phasage.(Long Travel Damper). The support can be rotatably coupled to the phasing member.
Par ailleurs, les organes élastiques du ou de chaque groupe peuvent prendre appui, d'une part, sur un voile annulaire et, d'autre part, sur deux rondelles de guidage qui s'étendent radialement, de part et d'autre du voile annulaire et qui sont mobiles en rotation par rapport à ce dernier. Furthermore, the resilient members of the or each group may bear, on the one hand, on an annular web and, on the other hand, on two guide washers which extend radially on either side of the web. annular and which are rotatable relative to the latter.
Dans ce cas, les rondelles de guidage peuvent appartenir à l'élément d'entrée de couple, le voile annulaire appartenant à l'élément de sortie de couple  In this case, the guide washers may belong to the torque input member, the annular web belonging to the torque output member
En outre, l'une au moins des rondelles de guidage peut comporter au moins une fenêtre située circonférentiellement en regard d'au moins un organe élastique, les moyens de butée complémentaires étant formés par l'une au moins des extrémités circonférentielles de ladite fenêtre.  In addition, at least one of the guide washers may comprise at least one window located circumferentially facing at least one resilient member, the complementary abutment means being formed by at least one of the circumferential ends of said window.
Le support des masses mobiles peut alors comporter une partie annulaire à partir de laquelle au moins une zone de butée s'étend radialement vers l'intérieur, ladite zone de butée étant apte à venir en appui sur l'une au moins des extrémités circonférentielle de ladite fenêtre.  The support of the moving masses may then comprise an annular portion from which at least one abutment zone extends radially inwards, said abutment zone being able to bear on at least one of the circumferential ends of the abutment. said window.
De plus, l'une au moins des rondelles de guidage peut comporter une partie annulaire radialement interne et une partie annulaire radialement externe, décalées axialement l'une par rapport à l'autre, la fenêtre étant située radialement entre lesdites parties annulaires interne et externe.  In addition, at least one of the guide washers may comprise a radially inner annular portion and a radially outer annular portion, axially offset relative to one another, the window being located radially between said inner and outer annular portions. .
Selon une forme de réalisation de l'invention, les moyens d'entrée de couple ou les moyens de sortie de couple peuvent comporter un moyeu comprenant une partie annulaire s'étendant radialement dans laquelle est ménagée au moins une ouverture oblongue en forme d'arc de cercle, le support des masses pendulaires comprenant au moins un plot s'étendant axialement, engagé dans ladite ouverture, le débattement angulaire dudit support par rapport au moyeu étant limité par butée dudit plot sur les extrémités circonférentielles de l'ouverture oblongue.  According to one embodiment of the invention, the torque input means or the torque output means may comprise a hub comprising a radially extending annular portion in which is formed at least one arcuate oblong opening. circle, the support of the pendular masses comprising at least one axially extending pin, engaged in said opening, the angular displacement of said support relative to the hub being limited by abutment of said stud on the circumferential ends of the oblong opening.
Ledit plot peut être formé par un rivet. Par ailleurs, le moyeu peut comporter une partie cylindrique cannelée à partir de laquelle la partie annulaire comprenant l'ouverture oblongue s'étend radialement vers l'intérieur. Said stud may be formed by a rivet. Furthermore, the hub may comprise a grooved cylindrical portion from which the annular portion comprising the oblong opening extends radially inwards.
En outre, le moyeu peut être fixé, par exemple par rivetage, à l'une des rondelles de guidage.  In addition, the hub can be fixed, for example by riveting, to one of the guide washers.
Le débattement angulaire entre le support des masses pendulaire d'une part, et l'élément d'entrée de couple, respectivement l'élément de sortie de couple, d'autre part, peut être compris entre 1 et 30°, de préférence entre 5 et 30°.  The angular displacement between the pendular mass support on the one hand, and the torque input element, respectively the torque output element, on the other hand, can be between 1 and 30 °, preferably between 5 and 30 °.
Le dispositif de transmission de couple peut également comprendre l'une au moins des caractéristiques suivantes :  The torque transmission device may also include at least one of the following features:
- les masses pendulaires sont montées en périphérie radialement externe du support.  the pendulum masses are mounted at the radially outer periphery of the support.
- le support est couplé en rotation à l'organe de phasage, par l'intermédiaire d'entretoises,  the support is coupled in rotation to the phasing member, by means of spacers,
- lesdites entretoises sont rivetées au support et à l'organe de phasage,  said spacers are riveted to the support and to the phasing member,
- le dispositif comporte un moyeu, radialement interne, destiné à être couplé à un arbre d'entrée d'une boîte de vitesse,  the device comprises a hub, radially internal, intended to be coupled to an input shaft of a gearbox,
- ledit moyeu est couplé en rotation au voile annulaire,  said hub is coupled in rotation to the annular web,
- le dispositif comporte un premier groupe d'organes élastiques montés entre les éléments d'entrée et de sortie de couple, conçus pour agir à encontre de la rotation de l'un desdits éléments d'entrée ou de sortie de couple, lors de la rotation de l'un desdits éléments d'entrée ou de sortie de couple par rapport à l'autre sur une première plage angulaire déterminée, et un second groupe d'organes élastiques, montés avec jeu entre les éléments d'entrée et de sortie de couple, en parallèle du premier groupe d'organes élastiques et conçus pour agir à encontre de la rotation de l'un desdits éléments d'entrée ou de sortie de couple, sur une seconde plage angulaire déterminée, inférieure à la première plage angulaire. - les organes élastiques du second groupe sont logés, au moins en partie, dans un logement du premier moyeu radialement interne. the device comprises a first group of elastic members mounted between the input and torque output elements, designed to act against the rotation of one of said input or torque output elements, during the rotating one of said input or torque output members relative to the other over a first determined angular range, and a second group of resilient members, mounted with clearance between the input and output elements of torque, in parallel with the first group of elastic members and designed to act against the rotation of one of said input or torque output members, over a second defined angular range, less than the first angular range. - The elastic members of the second group are housed, at least in part, in a housing of the first radially inner hub.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante faite à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :  The invention will be better understood and other details, characteristics and advantages of the invention will appear on reading the following description given by way of non-limiting example with reference to the accompanying drawings in which:
les figures 1 à 6 représentent un dispositif de transmission de couple selon une première forme de réalisation de l'invention, dans lesquelles :  FIGS. 1 to 6 show a torque transmission device according to a first embodiment of the invention, in which:
- la figure 1 est une vue schématique d'un convertisseur de couple équipé d'un dispositif de transmission de couple selon l'invention, la figure 2 est une vue en perspective, de l'avant, du dispositif,  FIG. 1 is a schematic view of a torque converter equipped with a torque transmission device according to the invention, FIG. 2 is a perspective view, from the front, of the device,
la figure 3 est une vue en perspective, de l'arrière, du dispositif,  FIG. 3 is a perspective view from the rear of the device,
la figure 4 est une vue correspondant à la figure 3, dans laquelle le moyeu cannelé n'est pas représenté,  FIG. 4 is a view corresponding to FIG. 3, in which the corrugated hub is not shown,
la figure 5 est une vue de face du dispositif, dans une position dite de repos,  FIG. 5 is a front view of the device, in a so-called rest position,
- la figure 6 est une vue correspondant à la figure 5, dans une position de butée,  FIG. 6 is a view corresponding to FIG. 5, in an abutment position,
les figures 7 à 9 représentent un dispositif de transmission de couple selon une seconde forme de réalisation de l'invention, dans lesquelles :  FIGS. 7 to 9 show a torque transmission device according to a second embodiment of the invention, in which:
- la figure 7 est une vue de face du dispositif, dans une position dite de repos,  FIG. 7 is a front view of the device, in a so-called rest position,
la figure 8 est une demi-vue en coupe selon la ligne VIII-VIII de la figure 7,  FIG. 8 is a half-sectional view along the line VIII-VIII of FIG. 7,
la figure 9 est une vue en perspective, de l'arrière, du dispositif. Les figures 1 à 6 représentent un dispositif de transmission de couple selon une première forme de réalisation de l'invention. Figure 9 is a perspective view from the rear of the device. Figures 1 to 6 show a torque transmission device according to a first embodiment of the invention.
Un convertisseur de couple hydrodynamique selon l'invention est représenté schématiquement et de façon partielle à la figure 1 . Ce convertisseur permet de transmettre un couple d'un arbre de sortie d'un moteur à combustion interne d'un véhicule automobile, tel par exemple qu'un vilebrequin 1 , à un arbre d'entrée 2 d'une boîte de vitesses.  A hydrodynamic torque converter according to the invention is shown schematically and partially in FIG. This converter makes it possible to transmit a torque of an output shaft of an internal combustion engine of a motor vehicle, such as for example a crankshaft 1, to an input shaft 2 of a gearbox.
Le convertisseur de couple comporte classiquement une roue à aubes d'impulseur 3, apte à entraîner hydrocinétiquement une roue à aubes de turbine 4, par l'intermédiaire d'un réacteur 5.  The torque converter conventionally comprises an impeller impeller 3 capable of hydrokinetically driving a turbine blade wheel 4 via a reactor 5.
La roue d'impulseur 3 est couplée au vilebrequin 1 et la roue de turbine 4 est couplée à un moyeu de turbine 6, lui-même couplé à deux rondelles de guidage 7, dites respectivement ci-après rondelle de guidage arrière 7a et rondelle de guidage avant 7b.  The impeller wheel 3 is coupled to the crankshaft 1 and the turbine wheel 4 is coupled to a turbine hub 6, itself coupled to two guide washers 7, hereinafter referred to respectively as the rear guide washer 7a and the washer front guide 7b.
Comme cela est mieux visible aux figures 2 à 6 illustrant une première forme de réalisation de l'invention, la rondelle de guidage avant 7b et le moyeu de turbine 6 sont montés rotatifs autour d'un moyeu central cannelé 8, destiné à être couplé à l'arbre d'entrée 2 de la boîte de vitesses.  As best seen in Figures 2 to 6 illustrating a first embodiment of the invention, the front guide ring 7b and the turbine hub 6 are rotatably mounted about a central hub groove 8, to be coupled to the input shaft 2 of the gearbox.
La rondelle de guidage avant 7a est montée autour du moyeu de turbine 6 et fixée à celui-ci par l'intermédiaire de pions 6a (figure 2). Les deux rondelles de guidage 7a, 7b s'étendent radialement et délimitent entre elles un espace interne 9 (figure 8) logeant des organes élastiques 10a, 10b d'un premier groupe, qui sont par exemple des ressorts hélicoïdaux de compression. Chaque organe 10a, 10b peut être composé de deux ressorts hélicoïdaux concentriques.  The front guide ring 7a is mounted around the turbine hub 6 and fixed thereto by means of pins 6a (Figure 2). The two guide washers 7a, 7b extend radially and delimit between them an internal space 9 (Figure 8) accommodating elastic members 10a, 10b of a first group, which are for example helical compression springs. Each member 10a, 10b may be composed of two concentric helical springs.
La rondelle de guidage arrière 7b comporte un rebord cylindrique 1 1 à sa périphérie radialement externe, s'étendant en direction de la rondelle de guidage avant 7a et fixé à celle-ci.  The rear guide washer 7b has a cylindrical rim January 1 at its radially outer periphery, extending towards the front guide ring 7a and fixed thereto.
L'extrémité libre du rebord cylindrique 1 1 comporte des languettes 12 (figure 2) s'étendant axialement, avant fixation des deux rondelles de guidage 7a, 7b entre elles. Ces languettes 12 sont engagées dans des ouvertures 13 de la rondelle de guidage avant 7a et sont rabattues lors d'une opération de rivetage, et peuvent être soudées à cette dernière, de manière à assurer la fixation des deux rondelles de guidage 7a, 7b. The free end of the cylindrical flange 1 1 comprises tongues 12 (Figure 2) extending axially, before fixing the two guide rings 7a, 7b therebetween. These tabs 12 are engaged in openings 13 of the front guide ring 7a and are folded during a riveting operation, and can be welded thereto, so as to ensure the attachment of the two guide rings 7a, 7b.
Les rondelles de guidage 7a, 7b comportent classiquement des fenêtres 14 servant à loger les organes élastiques 10a, 10b.  The guide washers 7a, 7b conventionally comprise windows 14 for accommodating the elastic members 10a, 10b.
Plus particulièrement, chaque rondelle de guidage 7a, 7b comporte une partie radialement interne 15 et une partie radialement externe 16 reliées l'une à l'autre par des pattes radiales 17, les bords latéraux desdites pattes radiales 17 formant les extrémités circonférentielles 18 des fenêtres.  More particularly, each guide washer 7a, 7b has a radially inner portion 15 and a radially outer portion 16 connected to each other by radial tabs 17, the lateral edges of said radial tabs 17 forming the circumferential ends 18 of the windows .
En ce qui concerne en particulier la rondelle de guidage arrière 7b, les parties radialement interne et externe 15, 16 sont décalées axialement l'une de l'autre, chaque patte 17 étant courbe axialement de façon à relier les deux parties précitées 15, 16. Les parties radialement internes 15 des deux rondelles de guidage 7a, 7b sont plus écartées l'une de l'autre que les parties radialement externes 16 desdites rondelles de guidage 7a, 7b. En particulier, chaque patte 17 comporte, à son extrémité reliée à la partie radialement interne, une zone plane 19 située sensiblement dans le plan radial de la partie radialement interne 15.  With particular regard to the rear guide washer 7b, the radially inner and outer portions 15, 16 are axially offset from one another, each tab 17 being axially curved so as to connect the two aforementioned parts 15, 16 The radially inner portions 15 of the two guide washers 7a, 7b are further spaced from one another than the radially outer portions 16 of said guide washers 7a, 7b. In particular, each lug 17 has, at its end connected to the radially inner portion, a flat zone 19 located substantially in the radial plane of the radially inner portion 15.
Un moyeu cannelé 20 est également fixé par rivetage sur la face arrière de la rondelle de guidage arrière 7b. Ce moyeu cannelé 20 comporte une partie radiale 21 fixée sur ladite face arrière de la rondelle de guidage arrière 7b, et un rebord cylindrique cannelé 22 s'étendant vers l'arrière depuis la périphérie radialement externe de la partie radiale 21 .  A splined hub 20 is also fixed by riveting on the rear face of the rear guide washer 7b. This corrugated hub 20 has a radial portion 21 fixed on said rear face of the rear guide washer 7b, and a fluted cylindrical flange 22 extending rearwardly from the radially outer periphery of the radial portion 21.
Un embrayage 23 (figure 1 ) permet de transmettre un couple du vilebrequin 1 aux rondelles de guidage 7, dans une phase de fonctionnement déterminée, sans faire intervenir la roue d'impulseur 3 et la roue de turbine 4. Cet embrayage 23 comporte un élément d'entrée 24 couplé au vilebrequin 1 et un élément de sortie 25, comprenant le moyeu cannelé 20. Un voile annulaire 26 s'étendant radialement est monté dans l'espace interne 9 délimité entre les rondelles de guidage 7a, 7b et est fixé sur le moyeu central 8, par exemple par l'intermédiaire de rivets. A clutch 23 (FIG. 1) makes it possible to transmit a torque from the crankshaft 1 to the guide washers 7, in a determined operating phase, without involving the impeller wheel 3 and the turbine wheel 4. This clutch 23 comprises an element input 24 coupled to the crankshaft 1 and an output member 25, including the splined hub 20. A radially extending annular web 26 is mounted in the internal space 9 delimited between the guide washers 7a, 7b and is fixed on the central hub 8, for example by means of rivets.
Le voile annulaire 26 comporte par exemple une partie annulaire radialement interne à partir de laquelle des pattes, par exemple au nombre de trois, s'étendent radialement vers l'extérieur. Chaque patte comporte deux faces opposées servant à l'appui des organes élastiques 10a, 10b, inclinées l'une par rapport à l'autre et par rapport à la direction radiale. Les organes élastiques du premier groupe 1 0a, 10b sont montés circonférentiellement entre le voile annulaire 26 et les rondelles de guidage 7a, 7b.  The annular web 26 comprises for example a radially inner annular portion from which tabs, for example three in number, extend radially outwardly. Each lug comprises two opposite faces serving to support the resilient members 10a, 10b, inclined with respect to each other and with respect to the radial direction. The elastic members of the first group 10a, 10b are circumferentially mounted between the annular web 26 and the guide washers 7a, 7b.
Plus particulièrement, les organes élastiques 10a, 10b sont agencés par paires. Les organes élastiques 10a, 10b d'une même paire sont agencés en série par l'intermédiaire d'un organe de phasage commun 27, de façon à ce que les organes élastiques 10a, 10b se déforment en phase les uns avec les autres. Dans la forme de réalisation représentée aux figures, le convertisseur de couple comporte trois paires d'organes élastiques 10a, 10b.  More particularly, the elastic members 10a, 10b are arranged in pairs. The elastic members 10a, 10b of the same pair are arranged in series via a common phasing member 27, so that the elastic members 10a, 10b deform in phase with each other. In the embodiment shown in the figures, the torque converter comprises three pairs of elastic members 10a, 10b.
Ainsi, pour chaque paire d'organes élastiques 10a, 10b, en fonction du sens de rotation des rondelles de guidage 7a, 7b par rapport au voile annulaire 26, l'un des organes élastiques (par exemple 10a) est destiné à prendre appui, d'une part, sur l'extrémité correspondante 18 des fenêtres 14 des rondelles de guidage 7a, 7b et, d'autre part, sur l'organe de phasage 27. L'autre organe élastique (par exemple 10b) est alors destiné à prendre appui, d'une part, sur l'organe de phasage 27 et, d'autre part, sur l'une des faces de la patte correspondante du voile annulaire 26.  Thus, for each pair of elastic members 10a, 10b, depending on the direction of rotation of the guide washers 7a, 7b with respect to the annular web 26, one of the elastic members (for example 10a) is intended to bear, on the one hand, on the corresponding end 18 of the windows 14 of the guide washers 7a, 7b and, on the other hand, on the phasing member 27. The other elastic member (for example 10b) is then intended to bear, on the one hand, on the phasing member 27 and, on the other hand, on one of the faces of the corresponding tab of the annular web 26.
L'organe de phasage 27 n'est visible que partiellement et comporte une partie annulaire à partir de laquelle des pattes 28 s'étendent radialement vers l'intérieur (figure 2). Chaque patte 28 comporte deux faces opposées 29 servant à l'appui des organes élastiques 10a, 10b, inclinées l'une par rapport à l'autre et par rapport à la direction radiale. Le dispositif comporte en outre des masses pendulaires 30 montées de façon mobile en périphérie radialement externe d'un support annulaire 31 . The phasing member 27 is visible only partially and has an annular portion from which lugs 28 extend radially inward (Figure 2). Each lug 28 has two opposite faces 29 serving to support the elastic members 10a, 10b, inclined with respect to each other and with respect to the radial direction. The device further comprises pendular masses 30 mounted movably at the radially outer periphery of an annular support 31.
Ledit support 31 comporte une partie annulaire 32 à partir de laquelle des zones de butée 33, ici au nombre de trois, s'étendent radialement vers l'intérieur. Chaque zone de butée 33 est située en regard de l'une des fenêtres 14 de la rondelle de guidage arrière 7b et comporte deux bords latéraux équipés de plots 34 de section arrondie, aptes à venir en appui sur les extrémités circonférentielles 18 de la fenêtre correspondante 14. En particulier, les plots 34 sont aptes à venir en appui sur les bords latéraux 18 des zones planes 19 des pattes radiales 17 de la rondelle de guidage 7b. Les plots 34 s'étendent dans le plan du support 31 .  Said support 31 comprises an annular portion 32 from which abutment zones 33, here three in number, extend radially inwards. Each abutment zone 33 is located opposite one of the windows 14 of the rear guide washer 7b and has two lateral edges equipped with studs 34 of rounded section, able to bear against the circumferential ends 18 of the corresponding window. 14. In particular, the pads 34 are able to bear on the lateral edges 18 of the plane zones 19 of the radial tabs 17 of the guide ring 7b. The pads 34 extend in the plane of the support 31.
Les zones de butée 33 sont également reliées à l'organe de phasage 27 par l'intermédiaire d'entretoises 35, qui peuvent être rivetées.  The abutment zones 33 are also connected to the phasing member 27 via spacers 35, which can be riveted.
Les masses pendulaires 30 sont montées de façon mobile sur le support 31 par l'intermédiaire de rouleaux 36 (visibles en partie à la figure 5) et d'entretoises 37, comme cela est connu en soi, ces masses 30 étant destinées à améliorer la filtration des vibrations et des acyclismes de rotation.  The pendular masses 30 are movably mounted on the support 31 by means of rollers 36 (partially visible in FIG. 5) and spacers 37, as is known per se, these masses 30 being intended to improve the filtration of vibrations and rotational acyclisms.
Le dispositif comporte en outre un second groupe d'organes élastiques 38 (figures 1 et 8) se présentant sous la forme de ressorts hélicoïdaux de compression et montés, pour partie, dans un logement annulaire 39 du moyeu 8 et, pour partie, dans un logement annulaire 40 du moyeu 6. Le logement 39 du moyeu 8 débouche axialement vers l'arrière et le logement 40 du moyeu 6 débouchement axialement vers l'avant.  The device further comprises a second group of elastic members 38 (FIGS. 1 and 8) in the form of helical compression springs and partly mounted in an annular recess 39 of the hub 8 and, in part, in a annular housing 40 of the hub 6. The housing 39 of the hub 8 opens axially rearwardly and the housing 40 of the hub 6 opens axially forwardly.
Chaque organe élastique 38 du second groupe comporte une première extrémité destinée à venir en appui contre une butée du moyeu 6 et une seconde extrémité destinée à venir en appui contre une butée du moyeu 8, ou inversement, en fonction du sens de rotation de l'élément d'entrée de couple (comprenant notamment les rondelles de guidage 7a, 7b et le moyeu 6) par rapport à l'élément de sortie de couple (comprenant notamment le voile 26 et le moyeu 8). Each elastic member 38 of the second group comprises a first end intended to bear against an abutment of the hub 6 and a second end intended to bear against an abutment of the hub 8, or vice versa, depending on the direction of rotation of the torque input element (including guide washers 7a, 7b and the hub 6) relative to the torque output member (including in particular the web 26 and the hub 8).
Les organes élastiques 38 du second groupe sont montés avec un jeu circonférentiel situé entre les extrémités desdits organes élastiques 38 et les butées des moyeux 6, 8. Ce jeu circonférentiel est noté j à la figure 1 .  The elastic members 38 of the second group are mounted with a circumferential clearance between the ends of said elastic members 38 and the abutments of the hubs 6, 8. This circumferential clearance is noted j in Figure 1.
En fonctionnement, les rondelles de guidage 7a, 7b et le moyeu 6 pivotent relativement par rapport au voile et au moyeu 8, d'un angle a (dans le sens direct ou dans le sens rétro).  In operation, the guide washers 7a, 7b and the hub 6 pivot relatively relative to the web and the hub 8, an angle a (in the forward direction or in the retro direction).
Tant que cet angle a est inférieur au jeu angulaire j, c'est-à- dire à un angle a1 , alors seuls les organes élastiques 10a et 10b du premier groupes sont actifs, c'est-à-dire agissent à encontre de la rotation de l'élément d'entrée de couple (rondelles 7a, 7b et moyeu 6) par rapport à l'élément de sortie de couple (voile et moyeu 8).  As long as this angle a is less than the angular clearance j, that is to say at an angle a1, then only the elastic members 10a and 10b of the first group are active, that is to say act against the rotation of the torque input member (washers 7a, 7b and hub 6) relative to the torque output member (web and hub 8).
Lorsque l'ensemble du jeu j est rattrapé, c'est-à-dire lorsque l'angle a est supérieur ou égal à a1 , alors les organes élastiques 38 du second groupe agissent en parallèle des organes élastiques 10a, 10b du premier groupe.  When the entire set j is caught, that is to say when the angle is greater than or equal to A1, the elastic members 38 of the second group act in parallel elastic members 10a, 10b of the first group.
La position a=0 est définie par la position de repos du dispositif dans laquelle aucun couple n'est transmis au travers dudit dispositif.  The position a = 0 is defined by the rest position of the device in which no torque is transmitted through said device.
Une telle position est illustrée à la figure 5. On constate que, dans cette position, les plots 34 des zones de butée 33 ne sont pas en appui sur les extrémités circonférentielles 18 des fenêtres 14 de la rondelle de guidage 7b.  Such a position is illustrated in FIG. 5. It can be seen that, in this position, the pads 34 of the abutment zones 33 do not bear against the circumferential ends 18 of the windows 14 of the guide ring 7b.
Les zones de butée 33, les plots 34 et les fenêtres 14 sont positionnés et dimensionnés de manière à limiter la compression des organes élastiques 10a, 10b et éviter, lorsqu'il s'agit de ressorts hélicoïdaux, que les spires des ressorts soient jointives lors de leur compression, aussi bien dans le sens de rotation dit sens direct que dans le sens de rotation opposé, dit sens rétro. Le sens direct correspond au cas de fonctionnement dans lequel du couple est transmis de l'élément d'entrée de couple vers l'élément de sortie de couple. Dans certaines phases de fonctionnement, par exemple lorsque l'utilisateur retire brusquement son pied de l'accélérateur, un couple résistant est transmis de l'élément de sortie de couple vers l'élément d'entrée de couple, ce qui peut provoquer une rotation de l'organe de phasage 27 dans le sens rétro. The abutment zones 33, the pads 34 and the windows 14 are positioned and dimensioned so as to limit the compression of the elastic members 10a, 10b and avoid, when it comes to coil springs, that the turns of the springs are contiguous when compression, both in the direction of rotation said direct direction in the opposite direction of rotation, said retro direction. The direct meaning corresponds to the case in which torque is transmitted from the torque input member to the torque output member. In certain phases of operation, for example when the user abruptly removes his foot from the accelerator, a resisting torque is transmitted from the torque output member to the torque input member, which may cause rotation of the phasing member 27 in the retro direction.
Le débattement angulaire total du support 31 et de l'organe de phasage 27 par rapport aux rondelles de guidage 7a, 7b est par exemple compris entre 1 et 30°, de préférence entre 5 et 30 °.  The total angular displacement of the support 31 and the phasing member 27 relative to the guide washers 7a, 7b is for example between 1 and 30 °, preferably between 5 and 30 °.
La figure 6 représente une position de butée du support 31 par rapport à la rondelle de guidage 7b, dans le cas où le support 31 pivote dans le sens direct par rapport aux rondelles de guidage 7a, 7b. Dans ce cas, les plots 34 sont en appui sur les extrémités circonférentielles correspondantes 18 des fenêtres 14 de la rondelle de guidage 7b.  FIG. 6 represents an abutment position of the support 31 with respect to the guide washer 7b, in the case where the support 31 pivots in the direct direction with respect to the guide washers 7a, 7b. In this case, the pads 34 bear against the corresponding circumferential ends 18 of the windows 14 of the guide washer 7b.
Les figures 7 à 9 représentent une seconde forme de réalisation de l'invention. Dans cette forme de réalisation, le support 31 des masses pendulaires 30 est, comme précédemment, couplé en rotation à l'organe de phasage 27, la périphérie radialement interne dudit support comportant des plots 41 , formés par exemple par des rivets, ici au nombre de trois et s'étendant axialement. Les plots 41 sont engagés dans des ouvertures oblongues 42 en forme d'arc de cercle ménagées dans la partie radiale 21 du moyeu cannelé 20.  Figures 7 to 9 show a second embodiment of the invention. In this embodiment, the support 31 of the pendular masses 30 is, as previously, rotatably coupled to the phasing member 27, the radially inner periphery of said support comprising studs 41, formed for example by rivets, here at the number of three and extending axially. The studs 41 are engaged in oblong apertures 42 in the shape of a circular arc formed in the radial portion 21 of the corrugated hub 20.
Les plots 41 et les ouvertures 42 sont positionnés et dimensionnés de façon à limiter le débattement angulaire du support 31 et de l'organe de phasage 27, d'une part, par rapport au moyeu cannelé 20 et aux rondelles de guidage 7a, 7b, d'autre part, par butée ou appui desdits plots 41 sur les extrémités circonférentielles 43 des ouvertures oblongues 42.  The pads 41 and the openings 42 are positioned and dimensioned so as to limit the angular displacement of the support 31 and the phasing member 27, on the one hand, with respect to the splined hub 20 and the guide washers 7a, 7b, on the other hand, by abutment or support of said pads 41 on the circumferential ends 43 of the oblong openings 42.
Comme précédemment, le débattement angulaire total du support 31 et de l'organe de phasage 27 par rapport aux rondelles de guidage 7a, 7b et au moyeu cannelé 20 est par exemple compris entre 1 et 30°, de préférence entre 5 et 30°. As previously, the total angular displacement of the support 31 and the phasing member 27 relative to the washers of 7a, 7b and the hub spline 20 is for example between 1 and 30 °, preferably between 5 and 30 °.
Dans ces deux formes de réalisation, compte tenu de la position des moyens de butée précités, il est possible de réduire l'encombrement radial du dispositif de transmission de couple et/ou d'augmenter le rayon d'implantation des organes élastiques 10a, 10b de manière à améliorer encore la qualité de filtration obtenue.  In these two embodiments, taking into account the position of the abovementioned abutment means, it is possible to reduce the radial size of the torque transmission device and / or to increase the implantation radius of the elastic members 10a, 10b. in order to further improve the filtration quality obtained.

Claims

REVENDICATIONS
1 . Dispositif de transmission de couple pour un véhicule automobile, comportant un élément d'entrée de couple (7a, 7b, 6) destiné à être couplé à un arbre moteur (1 ), et un élément de sortie de couple (26, 8), destiné à être couplé à un arbre (2) d'entrée d'une boîte de vitesses, des organes élastiques (10a, 10b) agissant à encontre de la rotation de l'un des éléments d'entrée et de sortie par rapport à l'autre et des moyens d'amortissement pendulaires comportant un support mobile (31 ) sur lequel des masses pendulaires (30) sont montées de façon mobile, caractérisé en ce que ledit support (31 ) comporte des moyens de butée (34) aptes à coopérer avec des moyens de butée complémentaires (18) de l'élément d'entrée de couple (7a, 7b, 6), respectivement de l'élément de sortie de couple (26, 8), de façon à limiter la rotation relative dudit support (31 ) par rapport à l'élément d'entrée de couple (7a, 7b, 6), respectivement la rotation relative dudit support (31 ) par rapport à l'élément de sortie de couple (26, 8). 1. Torque transmission device for a motor vehicle having a torque input member (7a, 7b, 6) for coupling to a motor shaft (1), and a torque output member (26, 8), intended to be coupled to an input shaft (2) of a gearbox, resilient members (10a, 10b) acting against the rotation of one of the input and output elements with respect to the and other pendular damping means comprising a movable support (31) on which pendulum masses (30) are mounted in a movable manner, characterized in that said support (31) comprises stop means (34) able to cooperate with complementary abutment means (18) of the torque input member (7a, 7b, 6), respectively of the torque output member (26, 8), so as to limit relative rotation of said medium (31) with respect to the torque input element (7a, 7b, 6), respectively the relative rotation t support (31) with respect to the torque output member (26, 8).
2. Dispositif selon la revendication 1 , caractérisé en ce qu'il comporte au moins un groupe d'organes élastiques (10a, 10b) monté entre les éléments d'entrée et de sortie de couple, les organes élastiques (10a, 10b) de ce groupe étant agencés en série par l'intermédiaire d'un organe de phasage (27), de façon à ce que les organes élastiques (10a, 10b) de chaque groupe se déforment en phase les uns avec les autres.  2. Device according to claim 1, characterized in that it comprises at least one group of elastic members (10a, 10b) mounted between the input and torque output members, the elastic members (10a, 10b) of this group being arranged in series via a phasing member (27), so that the elastic members (10a, 10b) of each group deform in phase with each other.
3. Dispositif selon la revendication 2, caractérisé en ce que le support (31 ) est couplé en rotation à l'organe de phasage (27).  3. Device according to claim 2, characterized in that the support (31) is rotatably coupled to the phasing member (27).
4. Dispositif de transmission de couple selon l'une des revendications 1 à 3, caractérisé en ce que les organes élastiques (10a, 10b) du ou de chaque groupe prennent appui, d'une part, sur un voile annulaire (26) et, d'autre part, sur deux rondelles de guidage (7a, 7b) qui s'étendent radialement, de part et d'autre du voile annulaire (26) et qui sont mobiles en rotation par rapport à ce dernier. 4. Torque transmission device according to one of claims 1 to 3, characterized in that the elastic members (10a, 10b) of the or each group are supported, on the one hand, on an annular web (26) and on the other hand, on two guide washers (7a, 7b) which extend radially on either side of the annular web (26) and which are rotatable relative thereto.
5. Dispositif de transmission de couple selon la revendication 4, caractérisé en ce que les rondelles de guidage (7a, 7b) appartiennent à l'élément d'entrée de couple, le voile annulaire (26) appartenant à l'élément de sortie de couple. Torque transmission device according to claim 4, characterized in that the guide washers (7a, 7b) belong to the torque input element, the annular web (26) belonging to the output element of couple.
6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que l'une (7b) au moins des rondelles de guidage (7a, 7b) comporte au moins une fenêtre (14) située circonférentiellement en regard d'au moins un organe élastique (10a, 10b), les moyens de butée complémentaires étant formés par l'une au moins des extrémités circonférentielles (18) de ladite fenêtre (14).  6. Device according to claim 4 or 5, characterized in that one (7b) at least guide washers (7a, 7b) comprises at least one window (14) circumferentially located facing at least one elastic member. (10a, 10b), the complementary abutment means being formed by at least one of the circumferential ends (18) of said window (14).
7. Dispositif selon la revendication 6, caractérisé en ce que le support (31 ) des masses mobiles (30) comporte une partie annulaire (32) à partir de laquelle au moins une zone de butée (33) s'étend radialement vers l'intérieur, ladite zone de butée (33) étant apte à venir en appui sur l'une au moins des extrémités circonférentielle (18) de ladite fenêtre (14).  7. Device according to claim 6, characterized in that the support (31) of the movable masses (30) comprises an annular portion (32) from which at least one abutment zone (33) extends radially towards the interior, said abutment zone (33) being able to bear on at least one circumferential end (18) of said window (14).
8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que l'une au moins des rondelles de guidage (7a, 7b) comporte une partie annulaire radialement interne (15) et une partie annulaire radialement externe (16), décalées axialement l'une par rapport à l'autre, la fenêtre (14) étant située radialement entre lesdites parties annulaires interne et externe (15, 16).  8. Device according to claim 6 or 7, characterized in that at least one of the guide washers (7a, 7b) comprises a radially inner annular portion (15) and a radially outer annular portion (16), axially offset. one with respect to the other, the window (14) being located radially between said inner and outer annular portions (15, 16).
9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que les moyens d'entrée de couple ou les moyens de sortie de couple comportent un moyeu (20) comprenant une partie annulaire s'étendant radialement (21 ) dans laquelle est ménagée au moins une ouverture oblongue (42) en forme d'arc de cercle, le support (31 ) des masses pendulaires (30) comprenant au moins un plot (41 ) s'étendant axialement, engagé dans ladite ouverture (42), le débattement angulaire dudit support (31 ) par rapport au moyeu (20) étant limité par butée dudit plot (41 ) sur les extrémités circonférentielles (43) de l'ouverture oblongue (42). 9. Device according to one of claims 1 to 8, characterized in that the torque input means or the torque output means comprise a hub (20) comprising a radially extending annular portion (21) in which at least one oblong opening (42) is provided in the form of a circular arc, the support (31) of the pendular masses (30) comprising at least one axially extending stud (41) engaged in said opening (42), the angular displacement of said support (31) relative to the hub (20) being limited by abutment of said stud (41) on the circumferential ends (43) of the oblong opening (42).
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que le débattement angulaire entre le support (31 ) des masses pendulaire (30) d'une part, et l'élément d'entrée de couple, respectivement l'élément de sortie de couple, d'autre part, est compris entre 1 et 30°, de préférence entre 5 et 30°. 10. Device according to one of claims 1 to 9, characterized in that the angular displacement between the support (31) of the pendulum masses (30) on the one hand, and the torque input element, respectively the torque output element, on the other hand, is between 1 and 30 °, preferably between 5 and 30 °.
PCT/FR2016/050695 2015-03-30 2016-03-25 Motor vehicle torque transmission device WO2016156726A1 (en)

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KR1020177026779A KR20170131839A (en) 2015-03-30 2016-03-25 Automotive Torque Transfer Device
DE112016001539.9T DE112016001539T5 (en) 2015-03-30 2016-03-25 Torque transmission device for a motor vehicle

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FR1552658A FR3034483B1 (en) 2015-03-30 2015-03-30 TORQUE TRANSMISSION DEVICE FOR A MOTOR VEHICLE

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20100133063A1 (en) 2007-08-02 2010-06-03 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Device for damping vibrations, in particular a multi-step torsional vibration damper
FR2981714A1 (en) 2011-10-19 2013-04-26 Valeo Embrayages PENDULUM OSCILLATOR TYPE DAMPING SYSTEM WITH IMPROVED GUIDE DEVICE
EP2711576A1 (en) * 2012-09-24 2014-03-26 Valeo Embrayages Torque transmission device for a vehicule
DE102013223753A1 (en) * 2012-11-22 2014-05-22 Schaeffler Technologies Gmbh & Co. Kg Hydrodynamic torque converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100133063A1 (en) 2007-08-02 2010-06-03 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Device for damping vibrations, in particular a multi-step torsional vibration damper
FR2981714A1 (en) 2011-10-19 2013-04-26 Valeo Embrayages PENDULUM OSCILLATOR TYPE DAMPING SYSTEM WITH IMPROVED GUIDE DEVICE
EP2711576A1 (en) * 2012-09-24 2014-03-26 Valeo Embrayages Torque transmission device for a vehicule
DE102013223753A1 (en) * 2012-11-22 2014-05-22 Schaeffler Technologies Gmbh & Co. Kg Hydrodynamic torque converter

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DE112016001539T5 (en) 2018-01-04
KR20170131839A (en) 2017-11-30
FR3034483B1 (en) 2019-11-22

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