WO2001004510A1 - Clutch torsional damper in particular for motor vehicle - Google Patents

Clutch torsional damper in particular for motor vehicle Download PDF

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Publication number
WO2001004510A1
WO2001004510A1 PCT/FR2000/001094 FR0001094W WO0104510A1 WO 2001004510 A1 WO2001004510 A1 WO 2001004510A1 FR 0001094 W FR0001094 W FR 0001094W WO 0104510 A1 WO0104510 A1 WO 0104510A1
Authority
WO
WIPO (PCT)
Prior art keywords
damper
guide
shock absorber
washer
guide washer
Prior art date
Application number
PCT/FR2000/001094
Other languages
French (fr)
Inventor
Laurent Lefolle
Gérard Lefevre
Original Assignee
Valeo
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 filed Critical Valeo
Priority to KR1020007014556A priority Critical patent/KR20010071556A/en
Priority to BR0006079-8A priority patent/BR0006079A/en
Priority to DE10081622T priority patent/DE10081622T1/en
Priority to JP2001509885A priority patent/JP2003504573A/en
Publication of WO2001004510A1 publication Critical patent/WO2001004510A1/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae
    • 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
    • F16F15/1238—Wound springs with pre-damper, i.e. additional set of springs between flange of main damper and hub
    • F16F15/12386—Pre-damper cage construction
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/60—Clutching elements
    • F16D13/64—Clutch-plates; Clutch-lamellae
    • F16D2013/642—Clutch-plates; Clutch-lamellae with resilient attachment of frictions rings or linings to their supporting discs or plates for allowing limited axial displacement of these rings or linings

Definitions

  • Torsional damper for a clutch in particular for a motor vehicle
  • the invention relates to a torsional damper for a clutch, such as in particular a friction clutch for a motor vehicle.
  • a shock absorber of this type comprises an input element, such as a friction disc, connected by a main shock absorber and a pre-shock absorber to a output element, such as a hub which can be joined in rotation with a driven shaft, for example the input shaft of a gearbox.
  • the main damper of such a torsional damper comprises an annular web formed with an internal circumferential toothing meshing, with a predetermined circumferential play, with a corresponding toothing of the output element, two guide washers which are integral with the input element and are arranged on either side of the annular web, elastic members with circumferential action, such as helical springs, housed in notches in the web and guide washers, and friction means interposed between the wall and at least one of the aforementioned guide washers.
  • the pre-shock absorber is mounted between the annular web of the main shock absorber and the output element and comprises elastic members with circumferential action, such as helical springs, having a stiffness less than that of the elastic members of the main shock absorber and which are arranged in housings formed in rotationally integral elements respectively of the main web and of the outlet element, friction means with axial action being interposed, to dampen vibrations, between the annular web of the main damper and one output element or between elements integral in rotation with the aforementioned annular web and the output element, respectively.
  • elastic members with circumferential action such as helical springs, having a stiffness less than that of the elastic members of the main shock absorber and which are arranged in housings formed in rotationally integral elements respectively of the main web and of the outlet element, friction means with axial action being interposed, to dampen vibrations, between the annular web of the main damper and one output element or between elements integral in rotation with the aforementioned annular web and the output element, respectively.
  • the pre-damper has a structure quite similar to that of the main damper and comprises an annular web integral in rotation with the output element, guide washers arranged on either side of this web annular and driven in rotation by the annular web of the main shock absorber, elastic members with circumferential action placed in housings formed in the web and in the guide washers of the pre-shock absorber, and friction means which are interposed for example between a guide ring of the main damper and the output element.
  • the two guide washers of the pre-damper are linked in rotation to one another and to the annular web of the main damper in a more or less complex manner, a first guide washer being for example applied on the annular web of the main shock absorber and immobilized in rotation on the second guide washer which has lugs extending parallel to the axis of rotation and engaged in holes in the annular web of the main shock absorber passing through notches or holes in the first guide washer, which in particular makes it possible to simplify the first guide washer, but complicates the mounting of the pre-damper in the main damper.
  • the object of the invention is in particular to provide a simple and effective solution to this problem, by optimally organizing ' the rotational connections of the washers guiding the pre-shock absorber therebetween and with the annular web of the main shock absorber.
  • the invention proposes, for this purpose, a torsion damper of the aforementioned type, comprising an input element connected to an output element by a main damper and a pre-damper, the main damper comprising an annular web meshing with play circumferential with the outlet element, two guide washers integral with the inlet element and arranged on either side of the annular web, elastic members with circumferential action housed in notches in the web and guide washers, and friction means interposed between the annular web and at least one of the guide washers, the pre-damper comprising another annular web integral in rotation with the outlet element, two other guide washers arranged on either side of said other sail and driven in rotation by the annular sail of the main damper, elastic members with circumferential action placed in housings nts formed in said other sail and said other guide washers, and friction means interposed between a guide washer of the main damper and the output element, characterized in that a first guide washer of the pre-damper is mounted by fitting on the annular web of the main damp
  • the mounting of the first guide ring of the pre-damper by interlocking on the annular web of the main damper and the mounting of the second guide washer by interlocking on the first guide washer greatly facilitate the mounting of the pre-damper in the shock absorber main.
  • the aforementioned sockets of the guide rings of the pre-damper can be tight (without play or force) or free (with play), a tight fitting having the advantage of ensuring a connection in axial translation in addition to a rotating link.
  • said first guide ring of the pre-shock absorber is applied to the annular web of the main shock absorber and has legs or fingers substantially parallel to the axis of rotation, nested in holes in the annular wall of the main shock absorber.
  • the second guide ring of the pre-shock absorber itself comprises tabs or fingers substantially parallel to the axis of rotation and nested forcibly or freely in the holes of the first guide ring of the pre-shock absorber and these holes are advantageously formed in the tabs or the output fingers of this first guide washer.
  • sockets can be made freely, in particular between the two guide washers.
  • FIG. 1 is a partial schematic view in axial section of a torsional damper according to
  • FIG. 1 is an enlarged view of the central part of Figure 1;
  • the torsion damper shown in FIGS. 1 and 2 comprises an input element 10, which is here a disc carrying friction linings 12 on its two faces at its external periphery, intended to be clamped by a clutch mechanism between a pressure plate and a reaction plate integral in rotation with a driving shaft, such as the crankshaft of an internal combustion engine.
  • This input element 10 is connected by a main damper 14 and a pre-damper 16 to an output element 18, which is here a cylindrical hub whose internal surface is formed with longitudinal grooves 20 making it possible to secure it in rotation with a driven shaft, such as the input shaft of a gearbox.
  • the main damper 14 comprises two guide washers 22, substantially parallel to one another and coaxial with the hub 18, an annular web 24 disposed between the guide washers 22 and having an internal toothing 26 which meshes with a predetermined circumferential play with an external toothing 28 of the hub 18.
  • Elastic members with circumferential action such as helical springs 30, are housed in notches 32, 34 facing the guide washers 22 and the annular web 24, respectively, in a manner allowing limited angular movement, with compression of the springs 30, between the guide washers 22 and the annular web 24.
  • the notches 32, 34 here consist of windows.
  • the notches 32- consist of stampings and the notches 34 in windows open to the outside.
  • the friction disc 10 is fixed, at its internal periphery, to one of the guide washers 22 by rivets 36 or by any other suitable means and the two guide washers are fixed to each other in rotation and in translation by means of balusters or the like 38 which here pass through, with circumferential clearance, the orifices of the external periphery of the annular web 24.
  • the pre-damper 16 is arranged axially between the annular web 24 of the main damper and the guide washer 22 secured to the friction disc 10, and radially between the hub 18 and the springs 30 of the main damper.
  • This pre-damper 16 comprises an annular web 40 fixedly mounted in translation and in rotation on the hub 18, and two guide washers 42 and 44 arranged on either side of the annular web 40 around the hub 18, these washers being free in rotation relative to the hub 18 and linked in rotation to the annular web 24 of the main damper, as will be seen below.
  • One 42, said first guide washer, of these guide washers is applied to the annular web 24 of the main damper and the other guide washer 44, called the second guide washer, is clamped between the first guide washer 42 and an annular flange 46 of a conical bearing 48 for centering on the hub 18 of the guide washer 22 to which the friction disc 10 is fixed, this conical bearing 48 being integral in rotation with the guide washer 22 by cooperation of shapes, as can be seen in FIG. 2, while the hub 18 has a conical bearing surface at its outer periphery to cooperate with the bearing 48.
  • Elastic members with circumferential action such as helical springs 50 having a stiffness significantly less than that of the springs 30 of the main damper, are received in housings formed by recesses 52 and 54 respectively of the guide washers 42 and 44 and by notches 56, here in the form of windows, of the annular web 40, so as to allow a limited angular movement, with compression of the springs 50, between the guide washers 42 and 44 on the one hand and the annular web 40 of somewhere else.
  • Friction means with axial action associated with the main damper 14 and with the pre-damper 16 include friction washers 58, 60 respectively, associated with elastic washers 62, 64 respectively such as Belleville washers or the like, the washer friction 58 being linked in rotation with the guide washer 22 opposite to that fixed to the friction disc 10, and being applied to the annular web 24 of the main damper by means of a drawer washer 66, the elastic washer associated 62 being disposed between this friction washer 58 and said guide washer 22.
  • the connection in rotation of the washer 58 is here made at using pins (not referenced) each engaged in an opening (not referenced) of said guide washer.
  • the friction washer 60 associated with the pre-damper 16 is applied to this guide washer 22 and is linked in rotation, by cooperation of shapes, with the hub 18, the associated elastic washer 64 being disposed between this friction washer 60 and a face d end of the toothing 28 of the means 18, with the interposition of a distribution washer.
  • the washer 60 has tabs (not referenced) each engaged in a notch in the toothing 28.
  • the guide washers 42 and 44 of the pre-damper are mounted by fitting one on the other and on the annular web 24 of the main damper, the first guide washer 42 applied to this web 24 comprising at its outer periphery tubular fingers 70 which extend parallel to the axis of rotation and which fit into orifices 72 in the annular web 24, the second guide washer 44 having at its outer periphery fingers 74 which s 'extend parallel to the axis of rotation and which are fitted into the tubular fingers 70 of the first guide washer 42.
  • the axial fingers 74 of the second guide washer 44 are fitted without play in the tubular fingers 70 of the first guide washer 42, and these tubular fingers 70 are themselves fitted with a radial clearance but without circumferential clearance in the orifices 72 of the annular web 24 of the main damper.
  • the first guide washer 42 is automatically positioned angularly and axially by application to the annular web 24 of the main damper and is maintained in the correct position by fitting its axial fingers 70 into the orifices 72 of the annular web 24.
  • the second guide washer 44 is automatically positioned relative to the first guide washer 42 by fitting its axial fingers 74 into the tubular fingers 70 of the first guide washer (after fitting of the annular web 40 and the springs 50) and is maintained in this correct position by the interlocking without play of the fingers 74 in the tubular fingers 70.
  • the pre-damper 16 is intended to filter vibrations at the idle speed of the internal combustion engine with which the clutch is associated. At this speed, the main damper 14 behaves like a rigid element due to the relatively high stiffness of its springs 30, and the vibrations are absorbed by the springs 50 of the pre-damper 16, and damped by friction of the washer 60 on the guide washer 22 and the bearing 48 on the hub.
  • the springs 50 of the pre-damper 16 When the engine rotation speed increases and the engine torque transmitted to the hub 18 also increases, the springs 50 of the pre-damper 16 are compressed to the maximum, the pre-damper 16 behaves like a rigid element between the annular web 24 of the main damper and the hub 18 because the teeth 26, 28 are then engaged, the web 24 being integral in rotation with the hub 18, and the vibrations and oscillations of torque are absorbed by the springs 30 of the main damper and damped by friction of the washer 58 on the main web 24 (via the drawer washer 66) until the balusters 38 come into engagement with the lateral edges of the orifices of the web 24 ' or until the springs 30 are compressed to the maximum, the main damper 14 behaves itself as a rigid element.
  • the means for fitting the guide washers 42 and 44 of the pre-damper are angularly offset relative to the notches 34 formed in the web 24 to receive the springs 30 of the main damper and that the orifices 72 formed in the web 24 for the fitting of the fingers 70 of the first guide washer 42 of the pre-damper are distant from the axis of rotation (we see on the lower part of FIG. 2 that these orifices 72 are at the level of the springs 30), which improves the mechanical strength of the web 24.
  • the springs 50 of the pre-damper are housed in recesses formed in the annular surfaces opposite the guide washers 42 and 44, these recesses being distributed circumferentially around the axis of rotation, and that these housings are closed radially towards the outside by a cylindrical part 76 of the second guide washer 44, the fingers 74 of this second washer being formed in the axial extension of this cylindrical part 76 which, between the fingers 74, has a reduced thickness as seen in the upper part of FIG. 2, so as not to interfere with the springs 30 of the main shock absorber.
  • the guide washers 42 and 44 of the pre-damper are advantageously molded parts made of any suitable material (plastic, material metallic or other). As a variant, at least one of the washers 42, 44 is made of sintered material.
  • the reinforcements 54 of the second guide washer 44 here consist of open bottom recesses and the reinforcements 52 of the first guide washer 42 of open bottom recesses; the springs 50 not exceeding the washers 42, 44.
  • the variant embodiment shown in FIG. 3 differs from that of FIGS. 1 and 2 in that the first guide washer 42 of the pre-damper is linked in rotation to the annular web 24 of the main damper by axial lugs 80 engaged in orifices 82 of the web 24, the second guide washer 44 of the pre-damper comprising axial fingers 74 identical to those of the embodiment of FIGS. 1 and 2 and which are engaged substantially without play in the orifices of the first guide washer 42 , formed radially inside the axial lugs 80 of this washer and tangentially to these lugs.
  • These orifices of the first guide washer 42 can open out inside the orifices 82 of the web 24 and the fingers 74 of the second guide washer 44 can therefore extend partly inside these orifices 82.
  • the first guide washer 42 of the pre-damper is substantially identical to that shown in Figure 3, and its axial lugs 80 are engaged substantially without play in the holes 84 of the web 24 of the main shock absorber.
  • the axial fingers 74 of the second guide washer 44 are shorter and extend only to inside the aforementioned orifices of the first washer 42, coming substantially into abutment on the annular web 24.
  • FIGS. 3 and 4 make it possible to reduce the dimensions of the orifices formed in the annular web 24 of the main damper for the interlocking of the tabs or the axial fingers of the first guide washer 42 and possibly of the second washer guide 44 of the pre-damper, which strengthens the mechanical strength of the web 24.
  • the presence of the flange 46 is not essential, in particular when the second guide washer 42 is made of plastic.
  • the toothing 28 is of reduced height at one of its ends for the formation of a shoulder making it possible to axially wedge the veil 40 in one direction and that in the other direction this veil is wedged axially by folding down material at the end of the teeth leading to fixing by crimping; the web 40 having an internal toothing meshing without play with the toothing 28.
  • the drawer washer 66 has an internal toothing meshing with the toothing 28 and this with a circumferential clearance smaller than that existing with the toothing 26, 28.
  • the orifices 72 may be formed from the internal edge of the windows 34.
  • a friction washer may be disposed between the first guide washer 44 and the web 24.
  • the first guide washer 44 is of planar shape, while the second washer guide envelope the springs 50 and surrounds the web 40 and has for this purpose an axial orientation flange carrying the tabs or the fingers according to the invention.
  • the ledge 144 retains the springs 50 radially outwards.

Abstract

The invention concerns a clutch torsional damper comprising an input element coupled via a main damper and a pre-damper to an output element (18), the pre-damper comprising an annular disc (40) integral in rotation with the output element (18), two guide washers (42 and 44) arranged on either side of the disc (40) and coupled in rotation with the annular disc (24) of the main damper, and springs (50) housed in recesses of the disc (40) and in indentations of the guide washers (42 and 44), the first guide washer (42) being fitted by nesting on the annular disc (24) of the main damper, and the second guide washer (44) being fitted by nesting on the first. The invention is applicable in particular to motor vehicle clutch systems.

Description

Amortisseur de torsion pour embrayage, en particulier de véhicule automobile Torsional damper for a clutch, in particular for a motor vehicle
L'invention concerne un amortisseur de torsion pour un embrayage, tel notamment qu ' un embrayage à friction pour véhicule automobile.The invention relates to a torsional damper for a clutch, such as in particular a friction clutch for a motor vehicle.
De façon connue (voir par exemple le document FR-A-2 735 548), un amortisseur de ce type comprend un élément d'entrée, tel qu'un disque de friction, relié par un amortisseur principal et un pré-amortisseur à un élément de sortie, tel qu'un moyeu solidarisable en rotation avec un arbre mené, par exemple l'arbre d'entrée d'une boîte de vitesses .In known manner (see for example document FR-A-2 735 548), a shock absorber of this type comprises an input element, such as a friction disc, connected by a main shock absorber and a pre-shock absorber to a output element, such as a hub which can be joined in rotation with a driven shaft, for example the input shaft of a gearbox.
L'amortisseur principal d'un tel amortisseur de torsion comprend un voile annulaire formé avec une denture circonférentielle interne engrenant, avec un jeu circonférentiel prédéterminé, avec une denture correspondante de l'élément de sortie, deux rondelles de guidage qui sont solidaires de l'élément d'entrée et sont disposées de part et d'autre du voile annulaire, des organes élastiques à action circonférentielle, tels que des ressorts hélicoïdaux, logés dans des échancrures du voile et des rondelles de guidage, et des moyens de frottement interposés entre le voile et au moins une des rondelles de guidage précitées.The main damper of such a torsional damper comprises an annular web formed with an internal circumferential toothing meshing, with a predetermined circumferential play, with a corresponding toothing of the output element, two guide washers which are integral with the input element and are arranged on either side of the annular web, elastic members with circumferential action, such as helical springs, housed in notches in the web and guide washers, and friction means interposed between the wall and at least one of the aforementioned guide washers.
Le pré-amortisseur est monté entre le voile annulaire de l'amortisseur principal et l'élément de sortie et comprend des organes élastiques à action circonférentielle, tels que des ressorts hélicoïdaux, ayant une raideur inférieure à celle des organes élastiques de l'amortisseur principal et qui sont disposés dans des logements formés dans des éléments solidaires en rotation respectivement du voile principal et de l'élément de sortie, des moyens de frottement à action axiale étant interposés, pour amortir les vibrations, entre le voile annulaire de l'amortisseur principal et 1 ' élément de sortie ou entre des éléments solidaires en rotation du voile annulaire précité et de l'élément de sortie, respectivement. Dans une réalisation connue, le pré-amortisseur a une structure assez semblable à celle de l'amortisseur principal et comprend un voile annulaire solidaire en rotation de l'élément de sortie, des rondelles de guidage disposées de part et d'autre de ce voile annulaire et entraînées en rotation par le voile annulaire de l'amortisseur principal, des organes élastiques à action circonférentielle placés dans des logements formés dans le voile et dans les rondelles de guidage du pré-amortisseur, et des moyens de frottement qui sont interposés par exemple entre une rondelle de guidage de 1 ' amortisseur principal et l'élément de sortie.The pre-shock absorber is mounted between the annular web of the main shock absorber and the output element and comprises elastic members with circumferential action, such as helical springs, having a stiffness less than that of the elastic members of the main shock absorber and which are arranged in housings formed in rotationally integral elements respectively of the main web and of the outlet element, friction means with axial action being interposed, to dampen vibrations, between the annular web of the main damper and one output element or between elements integral in rotation with the aforementioned annular web and the output element, respectively. In a known embodiment, the pre-damper has a structure quite similar to that of the main damper and comprises an annular web integral in rotation with the output element, guide washers arranged on either side of this web annular and driven in rotation by the annular web of the main shock absorber, elastic members with circumferential action placed in housings formed in the web and in the guide washers of the pre-shock absorber, and friction means which are interposed for example between a guide ring of the main damper and the output element.
Dans cette réalisation connue, les deux rondelles de guidage du pré-amortisseur sont liées en rotation l'une à l'autre et au voile annulaire de l'amortisseur principal de façon plus ou moins complexe, une première rondelle de guidage étant par exemple appliquée sur le voile annulaire de l'amortisseur principal et immobilisée en rotation sur la deuxième rondelle de guidage qui comporte des pattes s ' étendant parallèlement à l'axe de rotation et engagées dans des trous du voile annulaire de l'amortisseur principal en passant à travers des encoches ou des orifices de la première rondelle de guidage, ce qui permet notamment de simplifier la première rondelle de guidage, mais complique le montage du pré-amortisseur dans l'amortisseur principal.In this known embodiment, the two guide washers of the pre-damper are linked in rotation to one another and to the annular web of the main damper in a more or less complex manner, a first guide washer being for example applied on the annular web of the main shock absorber and immobilized in rotation on the second guide washer which has lugs extending parallel to the axis of rotation and engaged in holes in the annular web of the main shock absorber passing through notches or holes in the first guide washer, which in particular makes it possible to simplify the first guide washer, but complicates the mounting of the pre-damper in the main damper.
L'invention a notamment pour but d'apporter une solution simple et efficace à ce problème, en organisant de façon optimale ' les liaisons en rotation des rondelles de guidage du pré-amortisseur entre elles et avec le voile annulaire de l'amortisseur principal.The object of the invention is in particular to provide a simple and effective solution to this problem, by optimally organizing ' the rotational connections of the washers guiding the pre-shock absorber therebetween and with the annular web of the main shock absorber.
L'invention propose, à cet effet, un amortisseur de torsion du type précité, comprenant un élément d'entrée relié à un élément de sortie par un amortisseur principal et un pré-amortisseur, l'amortisseur principal comprenant un voile annulaire engrenant avec jeu circonférentiel avec l'élément de sortie, deux rondelles de guidage solidaires de l'élément d'entrée et disposées de part et d'autre du voile annulaire, des organes élastiques à action circonférentielle logés dans des échancrures du voile et des rondelles de guidage, et des moyens de frottement interposés entre le voile annulaire et au moins une des rondelles de guidage, le pré-amortisseur comprenant un autre voile annulaire solidaire en rotation de l'élément de sortie, deux autres rondelles de guidage disposées de part et d'autre dudit autre voile et entraînées en rotation par le voile annulaire de l'amortisseur principal, des organes élastiques à action circonférentielle placés dans des logements formés dans ledit autre voile et lesdites autres rondelles de guidage, et des moyens de frottement interposés entre une rondelle de guidage de l'amortisseur principal et l'élément de sortie, caractérisé en ce qu'une première rondelle de guidage du pré-amortisseur est montée par emboîtement sur le voile annulaire de l'amortisseur principal et en ce qu'une deuxième rondelle de guidage du pré-amortisseur est montée par emboîtement sur ladite première rondelle de guidage.The invention proposes, for this purpose, a torsion damper of the aforementioned type, comprising an input element connected to an output element by a main damper and a pre-damper, the main damper comprising an annular web meshing with play circumferential with the outlet element, two guide washers integral with the inlet element and arranged on either side of the annular web, elastic members with circumferential action housed in notches in the web and guide washers, and friction means interposed between the annular web and at least one of the guide washers, the pre-damper comprising another annular web integral in rotation with the outlet element, two other guide washers arranged on either side of said other sail and driven in rotation by the annular sail of the main damper, elastic members with circumferential action placed in housings nts formed in said other sail and said other guide washers, and friction means interposed between a guide washer of the main damper and the output element, characterized in that a first guide washer of the pre-damper is mounted by fitting on the annular web of the main damper and in that a second guide washer of the pre-damper is mounted by fitting on said first guide washer.
Le montage de la première rondelle de guidage du pré- amortisseur par emboîtement sur le voile annulaire de l'amortisseur principal et le montage de la deuxième rondelle de guidage par emboîtement sur la première rondelle de guidage facilitent beaucoup le montage du préamortisseur dans l'amortisseur principal. De plus, les emboîtements précités des rondelles de guidage du pré-amortisseur peuvent être serrés (sans jeu ou à force) ou libres (avec jeu) , un emboîtement serré ayant l'avantage d'assurer une liaison en translation axiale en plus d'une liaison en rotation.The mounting of the first guide ring of the pre-damper by interlocking on the annular web of the main damper and the mounting of the second guide washer by interlocking on the first guide washer greatly facilitate the mounting of the pre-damper in the shock absorber main. In addition, the aforementioned sockets of the guide rings of the pre-damper can be tight (without play or force) or free (with play), a tight fitting having the advantage of ensuring a connection in axial translation in addition to a rotating link.
Dans un mode de réalisation préféré de l'invention, ladite première rondelle de guidage du pré-amortisseur est appliquée sur le voile annulaire de l'amortisseur principal et comporte des pattes ou des doigts sensiblement parallèles à l'axe de rotation, emboîtés dans des trous du voile annulaire de l'amortisseur principal.In a preferred embodiment of the invention, said first guide ring of the pre-shock absorber is applied to the annular web of the main shock absorber and has legs or fingers substantially parallel to the axis of rotation, nested in holes in the annular wall of the main shock absorber.
La deuxième rondelle de guidage du pré-amortisseur comporte elle-même des pattes ou des doigts sensiblement parallèles à l'axe de rotation et emboîtés à force ou de manière libre dans des trous de la première rondelle de guidage du pré-amortisseur et ces trous sont avantageusement formés dans les pattes ou les doigts de sortie de cette première rondelle de guidage.The second guide ring of the pre-shock absorber itself comprises tabs or fingers substantially parallel to the axis of rotation and nested forcibly or freely in the holes of the first guide ring of the pre-shock absorber and these holes are advantageously formed in the tabs or the output fingers of this first guide washer.
Cela permet notamment de réaliser un pré-amortisseur dont les deux rondelles de guidage ont des doigts d'emboîtement coaxiaux, ceux de la première rondelle de guidage appliquée sur le voile annulaire de l'amortisseur principal étant tubulaires et ceux de la deuxième rondelle de guidage étant emboîtés dans les doigts tubulaires de la première rondelle de guidage.This makes it possible in particular to produce a pre-damper, the two guide washers of which have coaxial interlocking fingers, those of the first guide washer applied to the annular web of the main damper being tubular and those of the second guide washer. being fitted into the tubular fingers of the first guide washer.
On assure ainsi, sans risque d'erreur, un positionnement angulaire correct des deux rondelles de guidage du pré-amortisseur l'une par rapport à l'autre et par rapport au voile annulaire de l'amortisseur principal, une liaison en rotation des deux rondelles de guidage l'une avec l'autre et avec le voile annulaire de l'amortisseur principal et une liaison en translation lorsque les emboîtements se font à force ou sans jeu. Bien entendu les emboîtements peuvent être réalisés de manière libre notamment entre les deux rondelles de guidage.This ensures, without risk of error, correct angular positioning of the two guide rings of the pre-damper relative to each other and relative to the annular web of the main damper, a rotational connection of the two guide washers with each other and with the annular web of the main damper and a translational connection when the interlockings are made by force or without play. sockets can be made freely, in particular between the two guide washers.
L'invention sera mieux comprise et d'autres caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement à la lecture de la description qui suit faite à titre d'exemple en référence aux dessins annexés dans lesquels :The invention will be better understood and other characteristics, details and advantages thereof will appear more clearly on reading the following description given by way of example with reference to the appended drawings in which:
- la figure 1 est une vue schématique partielle en coupe axiale d'un amortisseur de torsion selon- Figure 1 is a partial schematic view in axial section of a torsional damper according to
1 ' invention ;The invention;
- la figure 2 est une vue à plus grande échelle de la partie centrale de la figure 1 ;- Figure 2 is an enlarged view of the central part of Figure 1;
- les figures 3 et 4 sont des vues semblables à la figure 2 et représentent des variantes de réalisation de- Figures 3 and 4 are views similar to Figure 2 and show alternative embodiments of
1 ' inventio .1 inventio.
L'amortisseur de torsion représenté aux figures 1 et 2 comprend un élément d'entrée 10, qui est ici un disque portant des garnitures de friction 12 sur ses deux faces à sa périphérie externe, destinées à être serrées par un mécanisme d'embrayage entre un plateau de pression et un plateau de réaction solidaires en rotation d'un arbre menant, tel que le vilebrequin d'un moteur à combustion interne.The torsion damper shown in FIGS. 1 and 2 comprises an input element 10, which is here a disc carrying friction linings 12 on its two faces at its external periphery, intended to be clamped by a clutch mechanism between a pressure plate and a reaction plate integral in rotation with a driving shaft, such as the crankshaft of an internal combustion engine.
Cet élément d'entrée 10 est relié par un amortisseur principal 14 et un pré-amortisseur 16 à un élément de sortie 18, qui est ici un moyeu cylindrique dont la surface interne est formée avec des cannelures longitudinales 20 permettant de le solidariser en rotation avec un arbre mené, tel que l'arbre d'entrée d'une boîte de vitesses.This input element 10 is connected by a main damper 14 and a pre-damper 16 to an output element 18, which is here a cylindrical hub whose internal surface is formed with longitudinal grooves 20 making it possible to secure it in rotation with a driven shaft, such as the input shaft of a gearbox.
L'amortisseur principal 14 comprend deux rondelles de guidage 22, sensiblement parallèles entre elles et coaxiales au moyeu 18, un voile annulaire 24 disposé entre les rondelles de guidage 22 et comportant une denture interne 26 qui engrène avec un jeu circonférentiel prédéterminé avec une denture externe 28 du moyeu 18.The main damper 14 comprises two guide washers 22, substantially parallel to one another and coaxial with the hub 18, an annular web 24 disposed between the guide washers 22 and having an internal toothing 26 which meshes with a predetermined circumferential play with an external toothing 28 of the hub 18.
Des organes élastiques à action circonférentielle, tels que des ressorts hélicoïdaux 30, sont logés dans des échancrures 32, 34 en vis à vis des rondelles de guidage 22 et du voile annulaire 24, respectivement, d'une façon autorisant un débattement angulaire limité, avec compression des ressorts 30, entre les rondelles de guidage 22 et le voile annulaire 24. Les échancrures 32,34 consistent ici en des fenêtres. En variante les échancrures 32- consistent en des emboutis et les échancrures 34 en des fenêtres ouvertes vers l'extérieur.Elastic members with circumferential action, such as helical springs 30, are housed in notches 32, 34 facing the guide washers 22 and the annular web 24, respectively, in a manner allowing limited angular movement, with compression of the springs 30, between the guide washers 22 and the annular web 24. The notches 32, 34 here consist of windows. Alternatively the notches 32- consist of stampings and the notches 34 in windows open to the outside.
Le disque de friction 10 est fixé, à sa périphérie interne, sur l'une des rondelles de guidage 22 par des rivets 36 ou par tout autre moyen approprié et les deux rondelles de guidage sont fixées l'une à l'autre en rotation et en translation au moyen de colonnettes ou analogues 38 qui traversent ici avec jeu circonférentiel des orifices de la périphérie externe du voile annulaire 24.The friction disc 10 is fixed, at its internal periphery, to one of the guide washers 22 by rivets 36 or by any other suitable means and the two guide washers are fixed to each other in rotation and in translation by means of balusters or the like 38 which here pass through, with circumferential clearance, the orifices of the external periphery of the annular web 24.
Le pré-amortisseur 16 est agencé axialement entre le voile annulaire 24 de l'amortisseur principal et la rondelle de guidage 22 solidaire du disque de friction 10, et radialement entre le moyeu 18 et les ressorts 30 de l'amortisseur principal.The pre-damper 16 is arranged axially between the annular web 24 of the main damper and the guide washer 22 secured to the friction disc 10, and radially between the hub 18 and the springs 30 of the main damper.
Ce pré-amortisseur 16 comprend un voile annulaire 40 monté fixement en translation et en rotation sur le moyeu 18, et deux rondelles de guidage 42 et 44 disposées de part et d'autre du voile annulaire 40 autour du moyeu 18, ces rondelles étant libres en rotation par rapport au moyeu 18 et liées en rotation au voile annulaire 24 de l'amortisseur principal, comme on le verra ci-après. L'une 42, dite première rondelle de guidage, de ces rondelles de guidage est appliquée sur le voile annulaire 24 de l'amortisseur principal et l'autre rondelle de guidage 44, dite seconde rondelle de guidage, est serrée entre la première rondelle de guidage 42 et une bride annulaire 46 d'un palier conique 48 de centrage sur le moyeu 18 de la rondelle de guidage 22 à laquelle est fixé le disque de friction 10, ce palier conique 48 étant solidaire en rotation de la rondelle de guidage 22 par coopération de formes, comme on le voit bien en figure 2, tandis que le moyeu 18 présente une portée conique à sa périphérie externe pour coopérer avec le palier 48.This pre-damper 16 comprises an annular web 40 fixedly mounted in translation and in rotation on the hub 18, and two guide washers 42 and 44 arranged on either side of the annular web 40 around the hub 18, these washers being free in rotation relative to the hub 18 and linked in rotation to the annular web 24 of the main damper, as will be seen below. One 42, said first guide washer, of these guide washers is applied to the annular web 24 of the main damper and the other guide washer 44, called the second guide washer, is clamped between the first guide washer 42 and an annular flange 46 of a conical bearing 48 for centering on the hub 18 of the guide washer 22 to which the friction disc 10 is fixed, this conical bearing 48 being integral in rotation with the guide washer 22 by cooperation of shapes, as can be seen in FIG. 2, while the hub 18 has a conical bearing surface at its outer periphery to cooperate with the bearing 48.
Des organes élastiques à action circonférentielle, tels que des ressorts hélicoïdaux 50 ayant une raideur nettement inférieure à celle des ressorts 30 de l'amortisseur principal, sont reçus dans des logements formés par des renfoncements 52 et 54 respectivement des rondelles de guidage 42 et 44 et par des échancrures 56, ici en forme de fenêtres, du voile annulaire 40, de façon à autoriser un débattement angulaire limité, avec compression des ressorts 50, entre les rondelles de guidage 42 et 44 d'une part et le voile annulaire 40 d'autre part.Elastic members with circumferential action, such as helical springs 50 having a stiffness significantly less than that of the springs 30 of the main damper, are received in housings formed by recesses 52 and 54 respectively of the guide washers 42 and 44 and by notches 56, here in the form of windows, of the annular web 40, so as to allow a limited angular movement, with compression of the springs 50, between the guide washers 42 and 44 on the one hand and the annular web 40 of somewhere else.
Des moyens de frottement à action axiale associés à l'amortisseur principal 14 et au pré-amortisseur 16 comprennent des rondelles de frottement 58, 60 respectivement, associés à des rondelles élastiques 62, 64 respectivement telles que des rondelles Belleville ou analogues, la rondelle de frottement 58 étant liée en rotation avec la rondelle de guidage 22 opposée à celle fixée au disque de friction 10, et étant appliquée sur le voile annulaire 24 de l'amortisseur principal par l'intermédiaire d'une rondelle de tiroir 66, la rondelle élastique associée 62 étant disposée entre cette rondelle de frottement 58 et ladite rondelle de guidage 22. La liaison en rotation de la rondelle 58 est ici réalisée à l'aide de pions (non référencé) engagés chacun dans une ouverture (non référencée) de ladite rondelle de guidage.Friction means with axial action associated with the main damper 14 and with the pre-damper 16 include friction washers 58, 60 respectively, associated with elastic washers 62, 64 respectively such as Belleville washers or the like, the washer friction 58 being linked in rotation with the guide washer 22 opposite to that fixed to the friction disc 10, and being applied to the annular web 24 of the main damper by means of a drawer washer 66, the elastic washer associated 62 being disposed between this friction washer 58 and said guide washer 22. The connection in rotation of the washer 58 is here made at using pins (not referenced) each engaged in an opening (not referenced) of said guide washer.
La rondelle de frottement 60 associée au préamortisseur 16 est appliquée sur cette rondelle de guidage 22 et est liée en rotation, par coopération de formes, avec le moyeu 18, la rondelle élastique associée 64 étant disposée entre cette rondelle de frottement 60 et une face d'extrémité de la denture 28 du • moyen 18, avec interposition d'une rondelle de répartition. La rondelle 60 présente des pattes (non référencées) engagées chacune dans une échancrure de la denture 28.The friction washer 60 associated with the pre-damper 16 is applied to this guide washer 22 and is linked in rotation, by cooperation of shapes, with the hub 18, the associated elastic washer 64 being disposed between this friction washer 60 and a face d end of the toothing 28 of the means 18, with the interposition of a distribution washer. The washer 60 has tabs (not referenced) each engaged in a notch in the toothing 28.
Selon l'invention, les rondelles de guidage 42 et 44 du pré-amortisseur sont montées par emboîtement l'une sur l'autre et sur le voile annulaire 24 de l'amortisseur principal, la première rondelle de guidage 42 appliquée sur ce voile 24 comprenant à sa périphérie externe des doigts 70 tubulaires qui s'étendent parallèlement à l'axe de rotation et qui s'emboîtent dans des orifices 72 du voile annulaire 24, la deuxième rondelle de guidage 44 comportant à sa périphérie externe des doigts 74 qui s'étendent parallèlement à l'axe de rotation et qui sont emboîtés dans les doigts tubulaires 70 de la première rondelle de guidage 42.According to the invention, the guide washers 42 and 44 of the pre-damper are mounted by fitting one on the other and on the annular web 24 of the main damper, the first guide washer 42 applied to this web 24 comprising at its outer periphery tubular fingers 70 which extend parallel to the axis of rotation and which fit into orifices 72 in the annular web 24, the second guide washer 44 having at its outer periphery fingers 74 which s 'extend parallel to the axis of rotation and which are fitted into the tubular fingers 70 of the first guide washer 42.
Dans l'exemple de réalisation de la figure 2, les doigts axiaux 74 de la deuxième rondelle de guidage 44 sont emboîtés sans jeu dans les doigts tubulaires 70 de la première rondelle de guidage 42, et ces doigts tubulaires 70 sont eux mêmes emboîtés avec un jeu radial mais sans jeu circonférentiel dans les orifices 72 du voile annulaire 24 de l'amortisseur principal.In the embodiment of FIG. 2, the axial fingers 74 of the second guide washer 44 are fitted without play in the tubular fingers 70 of the first guide washer 42, and these tubular fingers 70 are themselves fitted with a radial clearance but without circumferential clearance in the orifices 72 of the annular web 24 of the main damper.
Cela simplifie le montage du pré-amortisseur 16: la première rondelle de guidage 42 est automatiquement positionnée angulairement et axialement par application sur le voile annulaire 24 de l'amortisseur principal et est maintenue en position correcte par emboîtement de ses doigts axiaux 70 dans les orifices 72 du voile annulaire 24. De même, la deuxième rondelle de guidage 44 est automatiquement positionnée par rapport à la première rondelle de guidage 42 par emboîtement de ses doigts axiaux 74 dans les doigts tubulaires 70 de la première rondelle de guidage (après mise en place du voile annulaire 40 et des ressorts 50) et est maintenue dans cette position correcte par l'emboîtement sans jeu des doigts 74 dans les doigts tubulaires 70.This simplifies the mounting of the pre-damper 16: the first guide washer 42 is automatically positioned angularly and axially by application to the annular web 24 of the main damper and is maintained in the correct position by fitting its axial fingers 70 into the orifices 72 of the annular web 24. Likewise, the second guide washer 44 is automatically positioned relative to the first guide washer 42 by fitting its axial fingers 74 into the tubular fingers 70 of the first guide washer (after fitting of the annular web 40 and the springs 50) and is maintained in this correct position by the interlocking without play of the fingers 74 in the tubular fingers 70.
Le fonctionnement de cet amortisseur de torsion est le suivant :The operation of this torsion damper is as follows:
Le pré-amortisseur 16 est destiné à filtrer les vibrations au régime de ralenti du moteur à combustion interne auquel est associé l'embrayage. A ce régime, 1 ' amortisseur principal 14 se comporte comme un élément rigide en raison de la raideur relativement élevée de ses ressorts 30, et les vibrations sont absorbées par les ressorts 50 du pré-amortisseur 16, et amorties par frottement de la rondelle 60 sur la rondelle de guidage 22 et du palier 48 sur le moyeu.The pre-damper 16 is intended to filter vibrations at the idle speed of the internal combustion engine with which the clutch is associated. At this speed, the main damper 14 behaves like a rigid element due to the relatively high stiffness of its springs 30, and the vibrations are absorbed by the springs 50 of the pre-damper 16, and damped by friction of the washer 60 on the guide washer 22 and the bearing 48 on the hub.
Quand le régime de rotation du moteur augmente et que le couple moteur transmis au moyeu 18 augmente également, les ressorts 50 du pré-amortisseur 16 sont comprimés au maximum, le pré-amortisseur 16 se comporte comme un élément rigide entre le voile annulaire 24 de l'amortisseur principal et le moyeu 18 du fait que les dentures 26, 28 sont alors en prise, le voile 24 étant solidaire en rotation du moyeu 18, et les vibrations et oscillations de couple sont absorbées par les ressorts 30 de l'amortisseur principal et amorties par frottement de la rondelle 58 sur le voile principal 24 (par l'intermédiaire de la rondelle tiroir 66) jusqu'à ce que les colonnettes 38 viennent en prise avec les bords latéraux des orifices du voile 24 ' ou jusqu'à ce que les ressorts 30 étant comprimés au maximum, l'amortisseur principal 14 se comporte lui-même comme un élément rigide.When the engine rotation speed increases and the engine torque transmitted to the hub 18 also increases, the springs 50 of the pre-damper 16 are compressed to the maximum, the pre-damper 16 behaves like a rigid element between the annular web 24 of the main damper and the hub 18 because the teeth 26, 28 are then engaged, the web 24 being integral in rotation with the hub 18, and the vibrations and oscillations of torque are absorbed by the springs 30 of the main damper and damped by friction of the washer 58 on the main web 24 (via the drawer washer 66) until the balusters 38 come into engagement with the lateral edges of the orifices of the web 24 ' or until the springs 30 are compressed to the maximum, the main damper 14 behaves itself as a rigid element.
De façon plus particulière, on notera que les moyens d'emboîtement des rondelles de guidage 42 et 44 du préamortisseur sont décalés angulairement par rapport aux échancrures 34 formées dans le voile 24 pour recevoir les ressorts 30 de l'amortisseur principal et que les orifices 72 formés dans le voile 24 pour l'emboîtement des doigts 70 de la première rondelle de guidage 42 du pré-amortisseur sont éloignés de l'axe de rotation (on voit sur la partie inférieure de la figure 2 que ces orifices 72 sont au niveau des ressorts 30), ce qui améliore la tenue mécanique du voile 24. On notera également que les ressorts 50 du pré- amortisseur sont logés dans des renfoncements formés dans les surfaces annulaires en regard des rondelles de guidage 42 et 44, ces renfoncements étant répartis circonférentiellement autour de l'axe de rotation, et que ces logements sont fermés radialement vers 1 ' extérieur par une partie cylindrique 76 de la deuxième rondelle de guidage 44, les doigts 74 de cette deuxième rondelle étant formés dans le prolongement axial de cette partie cylindrique 76 qui, entre les doigts 74, a une épaisseur réduite comme on le voit en partie supérieure de la figure 2, pour ne pas interférer avec les ressorts 30 de l'amortisseur principal.More particularly, it will be noted that the means for fitting the guide washers 42 and 44 of the pre-damper are angularly offset relative to the notches 34 formed in the web 24 to receive the springs 30 of the main damper and that the orifices 72 formed in the web 24 for the fitting of the fingers 70 of the first guide washer 42 of the pre-damper are distant from the axis of rotation (we see on the lower part of FIG. 2 that these orifices 72 are at the level of the springs 30), which improves the mechanical strength of the web 24. It will also be noted that the springs 50 of the pre-damper are housed in recesses formed in the annular surfaces opposite the guide washers 42 and 44, these recesses being distributed circumferentially around the axis of rotation, and that these housings are closed radially towards the outside by a cylindrical part 76 of the second guide washer 44, the fingers 74 of this second washer being formed in the axial extension of this cylindrical part 76 which, between the fingers 74, has a reduced thickness as seen in the upper part of FIG. 2, so as not to interfere with the springs 30 of the main shock absorber.
Cela permet de réduire 1 ' encombrement axial et radial de l'amortisseur de torsion selon l'invention, et de rapprocher au maximum les ressorts 30 de l'axe de rotation, pour les rendre moins sensibles aux forces centrifuges.This makes it possible to reduce the axial and radial size of the torsional damper according to the invention, and to bring the springs 30 as close as possible to the axis of rotation, to make them less sensitive to centrifugal forces.
Les rondelles de guidage 42 et 44 du pré-amortisseur sont avantageusement des pièces moulées réalisées dans toute matière appropriée (matière plastique, matière métallique ou autre) . En variante au moins l'une des rondelles 42, 44 est en matériau fritte. Les renforcements 54 de la deuxième rondelle 44 de guidage consiste ici en des creusures à fond fermé et les renforcements 52 de la première rondelle de guidage 42 en des creusures à fond ouvert ; les ressorts 50 ne dépassant pas des rondelles 42, 44.The guide washers 42 and 44 of the pre-damper are advantageously molded parts made of any suitable material (plastic, material metallic or other). As a variant, at least one of the washers 42, 44 is made of sintered material. The reinforcements 54 of the second guide washer 44 here consist of open bottom recesses and the reinforcements 52 of the first guide washer 42 of open bottom recesses; the springs 50 not exceeding the washers 42, 44.
La variante de réalisation représentée en figure 3 diffère de celle des figures 1 et 2 en ce que la première rondelle de guidage 42 du pré-amortisseur est liée en rotation au voile annulaire 24 de l'amortisseur principal par des pattes axiales 80 engagées dans des orifices 82 du voile 24, la deuxième rondelle de guidage 44 du pré- amortisseur comportant des doigts axiaux 74 identiques à ceux du mode de réalisation des figures 1 et 2 et qui sont engagés sensiblement sans jeu dans des orifices de la première rondelle de guidage 42, formés radialement à l'intérieur des pattes axiales 80 de cette rondelle et tangentiellement à ces pattes. Ces orifices de la première rondelle de guidage 42 peuvent déboucher à l'intérieur des orifices 82 du voile 24 et les doigts 74 de la deuxième rondelle de guidage 44 peuvent donc s'étendre en partie à 1 ' intérieur de ces orifices 82.The variant embodiment shown in FIG. 3 differs from that of FIGS. 1 and 2 in that the first guide washer 42 of the pre-damper is linked in rotation to the annular web 24 of the main damper by axial lugs 80 engaged in orifices 82 of the web 24, the second guide washer 44 of the pre-damper comprising axial fingers 74 identical to those of the embodiment of FIGS. 1 and 2 and which are engaged substantially without play in the orifices of the first guide washer 42 , formed radially inside the axial lugs 80 of this washer and tangentially to these lugs. These orifices of the first guide washer 42 can open out inside the orifices 82 of the web 24 and the fingers 74 of the second guide washer 44 can therefore extend partly inside these orifices 82.
Pour le reste, la structure de cet amortisseur de torsion est identique à celle représentée aux figures 1 et 2.For the rest, the structure of this torsion damper is identical to that shown in Figures 1 and 2.
Dans la variante de réalisation de la figure 4, la première rondelle de guidage 42 du pré-amortisseur est sensiblement identique à celle représentée en figure 3, et ses pattes axiales 80 sont engagées sensiblement sans jeu dans des orifices 84 du voile 24 de l'amortisseur principal .In the alternative embodiment of Figure 4, the first guide washer 42 of the pre-damper is substantially identical to that shown in Figure 3, and its axial lugs 80 are engaged substantially without play in the holes 84 of the web 24 of the main shock absorber.
Les doigts axiaux 74 de la deuxième rondelle de guidage 44 sont plus courts et s'étendent uniquement à l'intérieur des orifices précités de la première rondelle 42, en venant sensiblement en butée sur le voile annulaire 24.The axial fingers 74 of the second guide washer 44 are shorter and extend only to inside the aforementioned orifices of the first washer 42, coming substantially into abutment on the annular web 24.
Les variantes de réalisation des figures 3 et 4 permettent de réduire les dimensions des orifices formés dans le voile annulaire 24 de l'amortisseur principal pour l'emboîtement des pattes ou des doigts axiaux de la première rondelle de guidage 42 et éventuellement de la deuxième rondelle de guidage 44 du pré-amortisseur, ce qui renforce la tenue mécanique du voile 24.The variant embodiments of FIGS. 3 and 4 make it possible to reduce the dimensions of the orifices formed in the annular web 24 of the main damper for the interlocking of the tabs or the axial fingers of the first guide washer 42 and possibly of the second washer guide 44 of the pre-damper, which strengthens the mechanical strength of the web 24.
Bien entendu en variante la présence de la bride 46 n'-est pas indispensable notamment lorsque la seconde rondelle de guidage 42 est en matière plastique.Of course as a variant, the presence of the flange 46 is not essential, in particular when the second guide washer 42 is made of plastic.
Pour mémoire on rappellera que la denture 28 est de hauteur réduite à l'une de ses extrémités pour formation d'un épaulement permettant de caler axialement dans un sens le voile 40 et que dans l'autre sens ce voile est calé axialement par rabattement de matière à l'extrémité de la denture conduisant à une fixation par sertissage ; le voile 40 présentant une denture interne engrenant sans jeu avec la denture 28.As a reminder, it will be recalled that the toothing 28 is of reduced height at one of its ends for the formation of a shoulder making it possible to axially wedge the veil 40 in one direction and that in the other direction this veil is wedged axially by folding down material at the end of the teeth leading to fixing by crimping; the web 40 having an internal toothing meshing without play with the toothing 28.
La rondelle tiroir 66 présente une denture interne engrenant avec la denture 28 et ce avec un jeu circonférentiel inférieur à celui existant avec les dentures 26, 28.The drawer washer 66 has an internal toothing meshing with the toothing 28 and this with a circumferential clearance smaller than that existing with the toothing 26, 28.
Les orifices 72 peuvent être formés à partir du bord interne des fenêtres 34. Une rondelle de frottement peut être disposée entre la première rondelle de guidage 44 et le voile 24. La première rondelle de guidage 44 est de forme plane, tandis que la deuxième rondelle de guidage enveloppe les ressorts 50 et entoure le voile 40 et présente à cet effet un rebord d'orientation axial portant les pattes ou les doigts selon l'invention. Le rebord 144 permet de retenir les ressorts 50 radialement vers 1 ' extérieur . The orifices 72 may be formed from the internal edge of the windows 34. A friction washer may be disposed between the first guide washer 44 and the web 24. The first guide washer 44 is of planar shape, while the second washer guide envelope the springs 50 and surrounds the web 40 and has for this purpose an axial orientation flange carrying the tabs or the fingers according to the invention. The ledge 144 retains the springs 50 radially outwards.

Claims

REVENDICATIONS
1 - Amortisseur de torsion pour embrayage, en particulier de véhicule automobile, comprenant un élément d'entrée (10) relié à un élément de sortie (18) par un amortisseur principal (14) et un pré-amortisseur (16), l'amortisseur principal comprenant un voile annulaire (24) engrenant avec jeu avec l'élément de sortie (18), deux rondelles de guidage (22) solidaires de l'élément d'entrée et disposées de part et d'autre du voile annulaire (24), des organes élastiques (30) à action circonférentielle logés dans des échancrures du voile et des rondelles de guidage, et des moyens de frottement (58, 62) interposés entre le voile (24) et au moins une des rondelles de guidage (22), le pré-amortisseur (16) comprenant un autre voile annulaire (40) solidaire en rotation de l'élément de sortie (18), deux autres rondelles de guidage (42, 44) disposées de part et d'autre dudit autre voile (40) et entraînées en rotation par le voile annulaire (24) de l'amortisseur principal, des organes élastiques (50) à action circonférentielle placés dans des logements formés dans ledit autre voile (40) et dans lesdites autres rondelles de guidage, et des moyens de frottement (60, 64) interposés entre une rondelle de guidage (22) de l'amortisseur principal et l'élément de sortie (18), caractérisé en ce qu'une première rondelle de guidage (42) du pré-amortisseur (16) est montée par emboîtement sur le voile annulaire (24) de l'amortisseur principal et en ce qu'une deuxième rondelle de guidage (44) du pré-amortisseur est montée par emboîtement sur ladite première rondelle de guidage (42 ) .1 - Torsional damper for a clutch, in particular for a motor vehicle, comprising an input element (10) connected to an output element (18) by a main damper (14) and a pre-damper (16), the main damper comprising an annular web (24) meshing with play with the outlet element (18), two guide washers (22) integral with the inlet element and arranged on either side of the annular web (24 ), elastic members (30) with circumferential action housed in notches in the web and guide washers, and friction means (58, 62) interposed between the web (24) and at least one of the guide washers (22 ), the pre-damper (16) comprising another annular web (40) integral in rotation with the outlet element (18), two other guide washers (42, 44) arranged on either side of said other web (40) and driven in rotation by the annular web (24) of the main damper, s elastic members (50) with circumferential action placed in housings formed in said other web (40) and in said other guide washers, and friction means (60, 64) interposed between a guide washer (22) of the main damper and the output element (18), characterized in that a first guide washer (42) of the pre-damper (16) is mounted by interlocking on the annular web (24) of the main damper and in that a second guide washer (44) of the pre-damper is fitted by interlocking on said first guide washer (42).
2 - Amortisseur selon la revendication 1, caractérisé en ce que ladite première rondelle de guidage (42) du pré- amortisseur est appliquée sur le voile annulaire (24) de l'amortisseur principal et comporte des doigts ou des pattes (70, 80) sensiblement parallèles à l'axe de rotation et emboîtées dans des trous (72, 82, 84) du voile annulaire (24) précité.2 - Damper according to claim 1, characterized in that said first guide washer (42) of the pre- damper is applied to the annular web (24) of the main damper and comprises fingers or tabs (70, 80) substantially parallel to the axis of rotation and fitted into holes (72, 82, 84) of the annular web (24) cited above.
3 - Amortisseur selon la revendication 1 ou 2, caractérisé en ce que ladite deuxième rondelle de guidage (44) du pré-amortisseur comporte des pattes ou des doigts (74) sensiblement parallèles à l'axe de rotation et emboîtés dans des trous de ladite première rondelle de guidage (42 ) .3 - Shock absorber according to claim 1 or 2, characterized in that said second guide washer (44) of the pre-shock absorber has tabs or fingers (74) substantially parallel to the axis of rotation and fitted into holes in said first guide washer (42).
4 - Amortisseur selon la revendication 3 , caractérisé en ce que les trous précités de la première rondelle de guidage (42) s'étendent dans les pattes ou les doigts (70) de cette première rondelle de guidage.4 - Shock absorber according to claim 3, characterized in that the aforementioned holes of the first guide washer (42) extend in the tabs or the fingers (70) of this first guide washer.
5 - Amortisseur selon la revendication 4, caractérisé en ce que les doigts (70) de la première rondelle de guidage (42) sont tubulaires.5 - Shock absorber according to claim 4, characterized in that the fingers (70) of the first guide washer (42) are tubular.
6 - Amortisseur selon l'une des revendications précédentes, caractérisé en ce que la deuxième rondelle de guidage (44) du pré-amortisseur est appliquée sur une rondelle de guidage (22) de l'amortisseur principal et/ou sur un palier (48) de centrage de cette rondelle de guidage (22) .6 - Shock absorber according to one of the preceding claims, characterized in that the second guide washer (44) of the pre-shock absorber is applied to a guide washer (22) of the main shock absorber and / or on a bearing (48 ) for centering this guide washer (22).
7 - Amortisseur selon l'une des revendications précédentes, caractérisé en ce que les rondelles de guidage7 - Shock absorber according to one of the preceding claims, characterized in that the guide washers
(42, 44) du pré-amortisseur comportent, dans leurs surfaces annulaires en regard l'une de l'autre, des renfoncements(42, 44) of the pre-damper have, in their annular surfaces facing one another, recesses
(52, 54) répartis circonférentiellement et formant des logements partiels des organes élastiques (50) du pré- amortisseur .(52, 54) distributed circumferentially and forming partial housings of the elastic members (50) of the pre-shock absorber.
8 - Amortisseur selon l'une des revendications précédentes, caractérisé en ce que les rondelles de guidage (42, 44) du pré-amortisseur sont des pièces moulées. 8 - Shock absorber according to one of the preceding claims, characterized in that the guide washers (42, 44) of the pre-shock absorber are molded parts.
PCT/FR2000/001094 1999-04-22 2000-04-25 Clutch torsional damper in particular for motor vehicle WO2001004510A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020007014556A KR20010071556A (en) 1999-04-22 2000-04-25 Torsion damper for a clutch, in particular a motor-vehicle clutch
BR0006079-8A BR0006079A (en) 1999-04-22 2000-04-25 Torsion damper for packaging, especially for automotive vehicles
DE10081622T DE10081622T1 (en) 1999-04-22 2000-04-25 Torsional damper for a clutch, in particular for a motor vehicle
JP2001509885A JP2003504573A (en) 1999-04-22 2000-04-25 Torsion damper for clutches, especially automotive clutches

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR99/05080 1999-04-22
FR9905080A FR2792698B1 (en) 1999-04-22 1999-04-22 TORSION SHOCK ABSORBER FOR CLUTCH, ESPECIALLY A MOTOR VEHICLE

Publications (1)

Publication Number Publication Date
WO2001004510A1 true WO2001004510A1 (en) 2001-01-18

Family

ID=9544727

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2000/001094 WO2001004510A1 (en) 1999-04-22 2000-04-25 Clutch torsional damper in particular for motor vehicle

Country Status (6)

Country Link
JP (1) JP2003504573A (en)
KR (1) KR20010071556A (en)
BR (1) BR0006079A (en)
DE (1) DE10081622T1 (en)
FR (1) FR2792698B1 (en)
WO (1) WO2001004510A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830590B1 (en) 2001-10-08 2004-07-09 Valeo TRANSMISSION ASSEMBLY COMPRISING TWO CLUTCHES AND AN ELECTRIC MACHINE, IN PARTICULAR FOR A MOTOR VEHICLE
FR2830589B1 (en) * 2001-10-08 2004-04-23 Valeo AUTOMOTIVE VEHICLE TRANSMISSION KIT INCLUDING TWO CLUTCHES AND AN ELECTRIC MACHINE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611245A1 (en) * 1987-02-24 1988-08-26 Valeo CLUTCH FRICTION DISC WITH PRE-SHOCK ABSORBER
GB2210677A (en) * 1984-11-23 1989-06-14 Luk Lamellen & Kupplungsbau Torsional vibration damper
EP0546557A2 (en) * 1991-12-10 1993-06-16 FICHTEL & SACHS AG Clutch disk for a vehicle friction clutch
WO1995024573A1 (en) * 1994-03-11 1995-09-14 Valeo Torsional predamper, in particular for motor vehicles
FR2735548A1 (en) * 1995-06-19 1996-12-20 Valeo TORSION DAMPING DEVICE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210677A (en) * 1984-11-23 1989-06-14 Luk Lamellen & Kupplungsbau Torsional vibration damper
FR2611245A1 (en) * 1987-02-24 1988-08-26 Valeo CLUTCH FRICTION DISC WITH PRE-SHOCK ABSORBER
EP0546557A2 (en) * 1991-12-10 1993-06-16 FICHTEL & SACHS AG Clutch disk for a vehicle friction clutch
WO1995024573A1 (en) * 1994-03-11 1995-09-14 Valeo Torsional predamper, in particular for motor vehicles
FR2735548A1 (en) * 1995-06-19 1996-12-20 Valeo TORSION DAMPING DEVICE

Also Published As

Publication number Publication date
KR20010071556A (en) 2001-07-28
BR0006079A (en) 2002-04-16
DE10081622T1 (en) 2001-08-02
JP2003504573A (en) 2003-02-04
FR2792698B1 (en) 2002-04-26
FR2792698A1 (en) 2000-10-27

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