WO2000060252A1 - Torsion shock absorber for a clutch and set of friction washers for said torsion shock absorber - Google Patents

Torsion shock absorber for a clutch and set of friction washers for said torsion shock absorber Download PDF

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Publication number
WO2000060252A1
WO2000060252A1 PCT/FR2000/000773 FR0000773W WO0060252A1 WO 2000060252 A1 WO2000060252 A1 WO 2000060252A1 FR 0000773 W FR0000773 W FR 0000773W WO 0060252 A1 WO0060252 A1 WO 0060252A1
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WO
WIPO (PCT)
Prior art keywords
washer
friction
shock absorber
washers
damper
Prior art date
Application number
PCT/FR2000/000773
Other languages
French (fr)
Other versions
WO2000060252A9 (en
Inventor
Laurent Lefolle
Xavier Fesselet
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 BR0005572-7A priority Critical patent/BR0005572A/en
Priority to JP2000609716A priority patent/JP4933695B2/en
Priority to DE10080940T priority patent/DE10080940B3/en
Publication of WO2000060252A1 publication Critical patent/WO2000060252A1/en
Publication of WO2000060252A9 publication Critical patent/WO2000060252A9/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
    • F16F15/129—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 characterised by friction-damping means
    • 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
    • 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
    • F16F2226/00—Manufacturing; Treatments
    • F16F2226/04—Assembly or fixing methods; methods to form or fashion parts

Definitions

  • the invention relates to a torsional damper in particular for a clutch for a motor vehicle, as well as a set of friction washers intended for this damper.
  • a torsion damper for a motor vehicle clutch comprises an input element connected to an output element by a main damper and by a pre-damper, the main damper comprising a annular web connected to the input element by elastically deformable members with circumferential action, such as helical springs, and first friction means interposed with first elastic clamping means with axial action between the web and a guide washer integral with the input element.
  • the pre-damper comprises an annular element integral with the aforementioned veil or connected to the above-mentioned veil by other elastically deformable members with circumferential action, such as helical springs which have a lower stiffness to that of the springs of the main damper, and second friction means interposed with second elastic clamping means with axial action between the outlet element and the aforementioned guide washer.
  • the friction means of the main shock absorber and of the pre-shock absorber can be formed by plastic washers associated with elastic washers of the Belleville type, the friction washer and the associated elastic washer of the main shock absorber surrounding the washer. friction and the associated elastic washer of the pre-shock absorber.
  • the first and second friction means comprising two washers, the first of which surrounds the second and is rotationally integral with the guide washer, characterized in that the two aforementioned friction washers are connected in manufacture to each other by fragile parts of material which are broken when mounted on the damper to separate the washers from one other.
  • the friction washers of the main shock absorber and of the pre-shock absorber are mounted in one piece on the shock absorber and then are separated from each other by rupture of their connecting means when they are in place, which then allows different relative behaviors of these washers during the operation of the torsion damper in one clutch.
  • the first friction washer comprises, on its face facing the guide washer, axial retaining means of an elastic washer forming part of the aforementioned first axial clamping means.
  • the two friction washers remain, after mounting in the damper, linked to each other in rotation by cooperation of shapes, the inner periphery of the first friction washer and the periphery outdoor of the second friction washer having for example crenellated and conjugate shapes which mesh with one another.
  • the aforementioned elastic washer can be immobilized in rotation on the first friction washer, by simple cooperation of shapes.
  • the second friction washer can be linked in rotation by cooperation of shapes, no longer with the first friction washer but with the aforementioned elastic washer, this second friction washer comprising for example tabs radial at its outer periphery which are engaged in radial notches of the inner periphery of said elastic washer.
  • the invention also provides a set of friction washers for a torsion damper of the type described above, this set being characterized in that it comprises two coaxial and substantially coplanar washers connected to one another by parts fragile material from manufacturing.
  • this assembly is made in one piece by plastic molding and advantageously comprises means for axial retention and immobilization in rotation of an elastic washer.
  • the invention simplifies the mounting of a torsion damper of the aforementioned type and reduces the time for mounting this damper on a machine provided for this purpose as well as the downtime of this machine by each shock absorber during assembly.
  • the friction washers and the associated elastic washers of the main shock absorber and the pre-shock absorber are positioned correctly and precisely with respect to each other, without risk of error.
  • FIG. 1 is a sectional view of a torsion damper known from the prior art
  • Figure 2 is a partial view of Figure 1 on a larger scale
  • Figure 3 is an axial sectional view of a subassembly according to the invention
  • Figure 4 is a partial sectional view showing this sub-assembly mounted in a torsion damper
  • Figure 5 is a partial side view of Figure 4;
  • Figure 6 is an axial sectional view of an alternative embodiment of the sub-assembly according to the invention.
  • FIG. 7 is an axial sectional view of another alternative embodiment of the subassembly according to the invention.
  • Figure 8 is a partial sectional view showing this sub-assembly mounted in a torsion damper.
  • Figures 1 and 2 show a torsional damper for clutch intended for a motor vehicle, of the type described in document FR-A-2,741,925.
  • This torsional damper comprises an input element 10 connected to an output element 12 by a main damper 14 and a pre-damper 16.
  • the input element 10 here consists of a disc 18 carrying at its outer periphery friction linings
  • An annular web 26 is disposed between the guide washers 22 and comprises an internal toothing 28 which meshes, with a predetermined circumferential clearance, with an external toothing 30 of the outlet element 12, such as for example a hub intended to be secured in rotation with a shaft driven by grooves 32 of its internal surface.
  • the main damper 14 comprises elastically deformable members 34 with circumferential action, here helical springs housed in windows facing the guide washers 22 and the annular web 26, as well as a friction washer 36 disposed between a guide washer 22 and the annular web 26 and pushed onto the web by an elastic washer 38 such as a Belleville washer.
  • the pre-damper 16 also comprises elastically deformable members with circumferential action, such as helical springs, of lower stiffness than the springs 34 of the main damper, which are housed for example in the notches of the abovementioned toothing 28 and 30 of the annular web and hub 12 (see figure
  • a friction washer 40 associated with an elastic washer 42 of the type Belleville washer is disposed between the aforementioned guide washer 22 and an annular flange of the hub 12.
  • the friction washers 36 and 40 described in the aforementioned document are made in one piece by molding, for example of plastic, and are connected to each other by lugs radial 44 flexible which allow a relative axial movement between the friction washers 36 and 40 while securing them in rotation.
  • the friction washer 36 of the main damper comprises, on its face facing the guide washer 22, pins projecting axially 46 housed in windows 48 of the guide washer 22 to secure in rotation this washer of guide and the assembly formed by the friction washers 36 and 40.
  • the input element 10 is rotated by a driving shaft such as the crankshaft of an internal combustion engine and transmits a torque at one output element 12 via the pre-damper 16 and the main damper 14.
  • the pre-damper 16 is intended to dampen or absorb vibrations at idle speed of the internal combustion engine, the main damper then behaving like a rigid element due to the relatively high stiffness of the springs 34.
  • the transmitted torque increases, the teeth 28 and 30 are engaged, the pre-damper 16 is in abutment and the vibrations and irregularities of the torque are then damped or absorbed by the main damper 14 until the latter is in turn in abutment.
  • the friction washer 40 urged by the elastic washer 42 makes it possible to brake the relative movements between the guide washer 22 and the hub 12 during the operation of the pre-damper
  • the friction washer 36 urged by the elastic washer 38 makes it possible to brake the relative movements between the guide washer 22 and the annular web 26 during the operation of the main damper, avoiding or reducing the impacts of the toothing 28 of the annular web 26 on the toothing 30 of the hub 12.
  • the production in one piece of the friction washers 36 and 40 makes it possible to reduce the number of parts of the damper and to simplify its mounting, the friction washers 36 and 40 being integral with one another. on the other in manufacturing rotation and can be easily joined in rotation with the guide washer 22, by engagement of the pins 46 in the windows 48.
  • the invention aims to perfect this concept, by improving its performance and further simplifying the mounting of a torsion damper of the aforementioned type, thanks to sub-assemblies such as those shown in Figures 3 and following.
  • a first embodiment of the invention shown in FIGS. 3 and 4 comprises a manufacturing sub-assembly formed by a first friction washer 50 (corresponding to the washer 36 in FIGS. 1 and 2), a second friction washer 52 ( corresponding to the washer 40 of Figures 1 and 2) and advantageously an elastic washer 54 (corresponding to the elastic washer 38 of Figures 1 and 2).
  • the friction washers 50 and 52 are made in one piece, for example by plastic molding, and are connected to each other by thin and fragile parts 56 from manufacturing, forming radial lugs between the inner periphery of the first washer 50 and the outer periphery of the second washer 52 and which are intended to be broken by a relatively small axial thrust when this sub-assembly is mounted in a shock absorber twist as shown in figure 4.
  • the elastic washer 54 associated with the first washer 50 is held in place on the latter by elastic clipping or snap-fastening, by virtue of axial rights 58 projecting from the face of the washer 50 which receives the elastic washer 54 and which end each by a flange or hook oriented towards one axis of the washer.
  • These snap-in fingers 58 are radially aligned with pins 60 projecting from the same face of the washer 50, radially outside the fingers 58, in order to secure in rotation the first washer 50 with the associated guide washer, designated by reference 62 in FIG. 4.
  • Radial lugs 64 are formed projecting from the outer periphery of the elastic washer 54 and extend on either side of the snap-in fingers 58 and pins 60 to immobilize in rotation, by cooperation of shapes, the elastic washer 54 on the first friction washer 50.
  • the second friction washer 52 also has, at its outer periphery, radial tabs 66 which are received, with a predetermined circumferential clearance, in notches 68 of the inner periphery of the first washer friction 50.
  • the tabs 66 end in bosses or axial returns 67 which will be in the plane of the notches 68 when mounted in the torsion damper (see FIG. 4).
  • the friction washers 50 and 52 are connected to each other by manufacturing, and it suffices to bring the elastic washer 54 onto the face of this sub-assembly comprising the axial fingers 58 and the pins 60, then to push it axially to slightly spread the axial fingers 58 outwards by elastic deformation, and clip or snap the elastic washer 54 onto all of the washers 50 and 52, the elastic washer 54 being retained axially on the first friction washer 50 and immobilized in rotation and centered by engagement of its radial lugs 64 on either side other of pawns 60.
  • this sub-assembly is mounted on a hub 70, the external peripheral surface of which comprises an annular shoulder on which the second friction washer 52 is applied. It suffices to push axially on the first friction washer 50 to break the tabs 56 which connect it to the second friction washer 52, which also has the effect of applying the first friction washer 50 to one face of an annular web 72 with internal teeth engaged with play predetermined circumferential on an external toothing 74 of the hub 70.
  • these windows 78 have a radial dimension sufficient to receive external radial lugs 80 of the elastic washer 76 and immobilize it in rotation relative to the guide washer 62.
  • the windows 78 have an oblong or substantially rectangular shape.
  • the axial fingers 58 of snap-fastening of the elastic washer 54 extend in the windows 78 of the guide washer 62 and can therefore have an optimal height (or dimension along the axis of rotation), pa perfectly adapted to snap-fastening and axial retention of the elastic washer 54.
  • the invention also makes it possible to reduce the axial size of the torsional damper.
  • the pins 60 formed on the first friction washer 50 have a substantially U-shaped section, open towards the axis of rotation, which allows to form the axial fingers 58 snap of the elastic washer 54 inside these pins 60.
  • a mortise is thus formed by virtue of the U-shaped section.
  • the elastic washer 54 has, at its outer periphery, radial tabs 82 which are housed inside the pins 60 in the aforementioned mortises and snap at their ends on the fingers CLAIMS
  • 1 - Torsional damper comprising an input element connected to an output element by a main damper and by a pre-damper
  • the main damper comprising an annular web (72) connected to the input element by members elastically deformable with circumferential action and first friction means (50) interposed with first elastic clamping means (54) with axial action between the web (72) and a guide washer (62) integral with the input element
  • the pre-damper comprising an annular element integral with the web (72) or formed by the latter and connected to the outlet element (70) by other elastically deformable members with circumferential action
  • second friction means (52 ) interposed with second elastic clamping means (76) with axial action between the outlet element (70) and the aforementioned guide washer (62)
  • the first and second friction means comprising d them washers (50, 52), one of which surrounds the other and is integral in rotation with the guide washer (62), characterized in that the two friction washers (50, 52) are connected by manufacturing one to the other by fragile parts of material
  • first friction washer (50) comprises, on its face facing the guide washer (62), means (58) for axial retention of an elastic washer (54) forming part of the first axial clamping means.
  • axial retaining means comprise axial fingers (58) of elastic snap-fastening on the periphery of said elastic washer (54).
  • said guide washer (62) comprises lights or windows (78) in which are engaged means (60) for rotationally connecting with the first friction washer (50) and radial lugs (80) of another elastic washer (76) forming part of the means for clamping the second friction washer (52).
  • one of the abovementioned friction washers comprises means (58, 60) for axial retention and immobilization in rotation of an elastic washer (54).

Abstract

A shock absorber for a clutch, comprising a set of friction washers(50, 52) that are respectively associated with a main shock absorber and a pre-shock absorber whereby the two washers (50, 52) are made in a single piece by moulding and are separated from each other in the assembly, whereby one of the washers (50) comprises means (58, 60) for axial retention and rotational immobilization of an associated elastic washer (54). The invention is particularly suitable for use in the clutches of internal combustion engines in motor cars.

Description

Amortisseur de torsion pour embrayage, et ensemble de rondelles de frottement pour cet amortisseur de torsion Torsional damper for clutch, and set of friction washers for this torsional damper
L'invention concerne un amortisseur de torsion en particulier pour un embrayage pour véhicule automobile, ainsi qu'un ensemble de rondelles de frottement destiné à cet amortisseur.The invention relates to a torsional damper in particular for a clutch for a motor vehicle, as well as a set of friction washers intended for this damper.
De façon bien connue de l'homme du métier, un amortisseur de torsion pour un embrayage de véhicule automobile comprend un élément d'entrée relié à un élément de sortie par un amortisseur principal et par un pré- amortisseur, l'amortisseur principal comprenant un voile annulaire relié à l'élément d'entrée par des organes élastiquement déformables à action circonférentielle, tels que des ressorts hélicoïdaux, et des premiers moyens de frottement interposés avec des premiers moyens de serrage élastique à action axiale entre le voile et une rondelle de guidage solidaire de l'élément d'entrée. De façon similaire, le pré-amortisseur comprend un élément annulaire solidaire du voile précité ou formé par ce dernier et relié à l'élément de sortie par d'autres organes élastiquement déformables à action circonférentielle, tels que des ressorts hélicoïdaux qui ont une raideur inférieure à celle des ressorts de l'amortisseur principal, et des seconds moyens de frottement interposés avec des seconds moyens de serrage élastique à action axiale entre l'élément de sortie et la rondelle de guidage précitée. Les moyens de frottement de l'amortisseur principal et du pré-amortisseur peuvent être formés par des rondelles de matière plastique associées à des rondelles élastiques du type Belleville, la rondelle de frottement et la rondelle élastique associée de l'amortisseur principal entourant la rondelle de frottement et la rondelle élastique associée du pré-amortisseur. moyens de frottement interposés avec des seconds moyens de serrage élastique à action axiale entre 1 ' élément de sortie et la rondelle de guidage précitée, les premier et second moyens de frottement comprenant deux rondelles dont la première entoure la seconde et est solidaire en rotation de la rondelle de guidage, caractérisé en ce que les deux rondelles de frottement précitées sont reliées de fabrication l'une à l'autre par des parties fragiles de matière qui sont rompues au montage sur l'amortisseur pour séparer les rondelles l'une de l'autre.As is well known to those skilled in the art, a torsion damper for a motor vehicle clutch comprises an input element connected to an output element by a main damper and by a pre-damper, the main damper comprising a annular web connected to the input element by elastically deformable members with circumferential action, such as helical springs, and first friction means interposed with first elastic clamping means with axial action between the web and a guide washer integral with the input element. Similarly, the pre-damper comprises an annular element integral with the aforementioned veil or connected to the above-mentioned veil by other elastically deformable members with circumferential action, such as helical springs which have a lower stiffness to that of the springs of the main damper, and second friction means interposed with second elastic clamping means with axial action between the outlet element and the aforementioned guide washer. The friction means of the main shock absorber and of the pre-shock absorber can be formed by plastic washers associated with elastic washers of the Belleville type, the friction washer and the associated elastic washer of the main shock absorber surrounding the washer. friction and the associated elastic washer of the pre-shock absorber. friction means interposed with second elastic clamping means with axial action between the output element and the aforementioned guide washer, the first and second friction means comprising two washers, the first of which surrounds the second and is rotationally integral with the guide washer, characterized in that the two aforementioned friction washers are connected in manufacture to each other by fragile parts of material which are broken when mounted on the damper to separate the washers from one other.
Ainsi, selon l'invention, les rondelles de frottement de l'amortisseur principal et du pré-amortisseur sont montées en une seule pièce sur l'amortisseur puis sont séparées l'une de l'autre par rupture de leurs moyens de liaison quand elles sont en place, ce qui autorise ensuite des comportements relatifs différents de ces rondelles lors du fonctionnement de l'amortisseur de torsion dans 1 ' embrayage .Thus, according to the invention, the friction washers of the main shock absorber and of the pre-shock absorber are mounted in one piece on the shock absorber and then are separated from each other by rupture of their connecting means when they are in place, which then allows different relative behaviors of these washers during the operation of the torsion damper in one clutch.
Avantageusement, la première rondelle de frottement comporte, sur sa face tournée vers la rondelle de guidage, des moyens de retenue axiale d'une rondelle élastique faisant partie des premiers moyens précités de serrage axial .Advantageously, the first friction washer comprises, on its face facing the guide washer, axial retaining means of an elastic washer forming part of the aforementioned first axial clamping means.
On peut alors constituer un sous-ensemble de trois pièces (les deux rondelles de frottement et la rondelle élastique associée à la première rondelle de frottement) indépendamment du montage de l'amortisseur de torsion proprement dit, et ensuite mettre en place ce sous-ensemble dans l'amortisseur de torsion. Selon une autre caractéristique de l'invention, les deux rondelles de frottement restent, après montage dans l'amortisseur, liées l'une à l'autre en rotation par coopération de formes, la périphérie intérieure de la première rondelle de frottement et la périphérie extérieure de la seconde rondelle de frottement ayant par exemple des formes crénelées et conjuguées qui engrènent l'une avec 1 ' autre.We can then constitute a sub-assembly of three parts (the two friction washers and the elastic washer associated with the first friction washer) independently of the mounting of the torsion damper itself, and then put this sub-assembly in place. in the torsion damper. According to another characteristic of the invention, the two friction washers remain, after mounting in the damper, linked to each other in rotation by cooperation of shapes, the inner periphery of the first friction washer and the periphery outdoor of the second friction washer having for example crenellated and conjugate shapes which mesh with one another.
On peut ainsi établir, par une simple coopération de formes entre les deux rondelles de frottement, une liaison en rotation d'une des rondelles par rapport à l'autre avec un débattement angulaire qui peut être sensiblement nul ou égal à une valeur maximale prédéterminée.One can thus establish, by a simple cooperation of shapes between the two friction washers, a rotational connection of one of the washers relative to the other with an angular clearance which can be substantially zero or equal to a predetermined maximum value.
De même, la rondelle élastique précitée peut être immobilisée en rotation sur la première rondelle de frottement, par simple coopération de formes.Similarly, the aforementioned elastic washer can be immobilized in rotation on the first friction washer, by simple cooperation of shapes.
Dans une variante de réalisation de l'invention, la seconde rondelle de frottement peut être liée en rotation par coopération de formes, non plus avec la première rondelle de frottement mais avec la rondelle élastique précitée, cette seconde rondelle de frottement comprenant par exemple des pattes radiales à sa périphérie externe qui sont engagées dans des encoches radiales de la périphérie interne de ladite rondelle élastique. L'invention propose également un ensemble de rondelles de frottement pour un amortisseur de torsion du type décrit ci-dessus, cet ensemble étant caractérisé en ce qu'il comprend deux rondelles coaxiales et sensiblement coplanaires reliées l'une a l'autre par des parties fragiles de matière venant de fabrication.In an alternative embodiment of the invention, the second friction washer can be linked in rotation by cooperation of shapes, no longer with the first friction washer but with the aforementioned elastic washer, this second friction washer comprising for example tabs radial at its outer periphery which are engaged in radial notches of the inner periphery of said elastic washer. The invention also provides a set of friction washers for a torsion damper of the type described above, this set being characterized in that it comprises two coaxial and substantially coplanar washers connected to one another by parts fragile material from manufacturing.
Dans un mode de réalisation de l'invention, cet ensemble est réalisé d'une pièce par moulage de matière plastique et comprend avantageusement des moyens de retenue axiale et d'immobilisation en rotation d'une rondelle élastique.In one embodiment of the invention, this assembly is made in one piece by plastic molding and advantageously comprises means for axial retention and immobilization in rotation of an elastic washer.
De façon générale, l'invention simplifie le montage d'un amortisseur de torsion du type précité et réduit le temps de montage de cet amortisseur sur une machine prévue à cet effet ainsi que la durée d'immobilisation de cette machine par chaque amortisseur en cours de montage. En outre, les rondelles de frottement et les rondelles élastiques associées de l'amortisseur principal et du préamortisseur sont positionnées correctement et précisément les unes par rapport aux autres, sans risque d'erreur.In general, the invention simplifies the mounting of a torsion damper of the aforementioned type and reduces the time for mounting this damper on a machine provided for this purpose as well as the downtime of this machine by each shock absorber during assembly. In addition, the friction washers and the associated elastic washers of the main shock absorber and the pre-shock absorber are positioned correctly and precisely with respect to each other, without risk of error.
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 description which follows, given by way of example with reference to the appended drawings in which:
- la figure 1 est une vue en coupe d'un amortisseur de torsion connu de la technique antérieure ;- Figure 1 is a sectional view of a torsion damper known from the prior art;
- la figure 2 est une vue partielle de la figure 1 à plus grande échelle ;- Figure 2 is a partial view of Figure 1 on a larger scale;
- la figure 3 est une vue en coupe axiale d'un sous- ensemble selon 1 ' invention ; la figure 4 est une vue partielle en coupe représentant ce sous-ensemble monté dans un amortisseur de torsion ;- Figure 3 is an axial sectional view of a subassembly according to the invention; Figure 4 is a partial sectional view showing this sub-assembly mounted in a torsion damper;
- la figure 5 est une vue partielle de côté de la figure 4 ; la figure 6 est une vue en coupe axiale d'une variante de réalisation du sous-ensemble selon l'invention ;- Figure 5 is a partial side view of Figure 4; Figure 6 is an axial sectional view of an alternative embodiment of the sub-assembly according to the invention;
- la figure 7 est une vue en coupe axiale d'une autre variante de réalisation du sous-ensemble selon 1 ' invention- Figure 7 is an axial sectional view of another alternative embodiment of the subassembly according to the invention
la figure 8 est une vue partielle en coupe représentant ce sous-ensemble monté dans un amortisseur de torsion.Figure 8 is a partial sectional view showing this sub-assembly mounted in a torsion damper.
On se réfère d'abord aux figures 1 et 2, qui représentent un amortisseur de torsion pour embrayage destiné à un véhicule automobile, du type décrit dans le document FR-A-2 741 925.We first refer to Figures 1 and 2, which show a torsional damper for clutch intended for a motor vehicle, of the type described in document FR-A-2,741,925.
Cet amortisseur de torsion comprend un élément d'entrée 10 relié à un élément de sortie 12 par un amortisseur principal 14 et un pré-amortisseur 16.This torsional damper comprises an input element 10 connected to an output element 12 by a main damper 14 and a pre-damper 16.
L'élément d'entrée 10 est ici constitué d'un disque 18 portant à sa périphérie externe des garnitures de frictionThe input element 10 here consists of a disc 18 carrying at its outer periphery friction linings
20 destinées à être serrées entre des plateaux de pression et de réaction de l'embrayage, le disque 18 étant relié fixement à deux rondelles de guidage 22 parallèles au moyen de colonnettes 24.20 intended to be clamped between pressure plates and clutch reaction plates, the disc 18 being fixedly connected to two parallel guide washers 22 by means of balusters 24.
Un voile annulaire 26 est disposé entre les rondelles de guidage 22 et comprend une denture interne 28 qui engrène, avec un jeu circonférentiel prédéterminé, avec une denture externe 30 de l'élément de sortie 12, tel par exemple qu'un moyeu destiné à être solidarisé en rotation avec un arbre mené par des cannelures 32 de sa surface interne.An annular web 26 is disposed between the guide washers 22 and comprises an internal toothing 28 which meshes, with a predetermined circumferential clearance, with an external toothing 30 of the outlet element 12, such as for example a hub intended to be secured in rotation with a shaft driven by grooves 32 of its internal surface.
L'amortisseur principal 14 comprend des organes élastiquement déformables 34 à action circonférentielle, ici des ressorts hélicoïdaux logés dans des fenêtres en vis-à-vis des rondelles de guidage 22 et du voile annulaire 26, ainsi qu'une rondelle de frottement 36 disposée entre une rondelle de guidage 22 et le voile annulaire 26 et poussée sur le voile par une rondelle élastique 38 telle qu'une rondelle Belleville.The main damper 14 comprises elastically deformable members 34 with circumferential action, here helical springs housed in windows facing the guide washers 22 and the annular web 26, as well as a friction washer 36 disposed between a guide washer 22 and the annular web 26 and pushed onto the web by an elastic washer 38 such as a Belleville washer.
Le pré-amortisseur 16 comprend également des organes élastiquement déformables à action circonférentielle, tels que des ressorts hélicoïdaux, de raideur plus faible que les ressorts 34 de l'amortisseur principal, qui sont logés par exemple dans des échancrures des dentures 28 et 30 précitées du voile annulaire et du moyeu 12 (voir la figureThe pre-damper 16 also comprises elastically deformable members with circumferential action, such as helical springs, of lower stiffness than the springs 34 of the main damper, which are housed for example in the notches of the abovementioned toothing 28 and 30 of the annular web and hub 12 (see figure
3 du document FR-A-2 741 925 précité) . Une rondelle de frottement 40 associée à une rondelle élastique 42 du type rondelle Belleville, est disposée entre la rondelle de guidage 22 précitée et un rebord annulaire du moyeu 12.3 of document FR-A-2 741 925 cited above). A friction washer 40 associated with an elastic washer 42 of the type Belleville washer, is disposed between the aforementioned guide washer 22 and an annular flange of the hub 12.
Comme on le voit mieux en figure 2, les rondelles de frottement 36 et 40 décrites dans le document précité sont réalisées d'une seule pièce par moulage, par exemple en matière plastique, et sont reliées l'une à l'autre par des pattes radiales 44 souples qui autorisent un déplacement axial relatif entre les rondelles de frottement 36 et 40 tout en les solidarisant en rotation. De plus, la rondelle de frottement 36 de l'amortisseur principal comporte, sur sa face tournée vers la rondelle de guidage 22, des pions en saillie axiale 46 logés dans des fenêtres 48 de la rondelle de guidage 22 pour solidariser en rotation cette rondelle de guidage et 1 ' ensemble formé par les rondelles de frottement 36 et 40.As best seen in Figure 2, the friction washers 36 and 40 described in the aforementioned document are made in one piece by molding, for example of plastic, and are connected to each other by lugs radial 44 flexible which allow a relative axial movement between the friction washers 36 and 40 while securing them in rotation. In addition, the friction washer 36 of the main damper comprises, on its face facing the guide washer 22, pins projecting axially 46 housed in windows 48 of the guide washer 22 to secure in rotation this washer of guide and the assembly formed by the friction washers 36 and 40.
Le fonctionnement d'un tel amortisseur de torsion est bien connu de l'homme du métier et sera rappelé brièvement ci-dessous :The operation of such a torsion damper is well known to those skilled in the art and will be briefly recalled below:
Quand les garnitures de friction 20 sont serrées entre les plateaux de pression et de réaction de l'embrayage, l'élément d'entrée 10 est entraîné en rotation par un arbre menant tel que le vilebrequin d'un moteur à combustion interne et transmet un couple de rotation à 1 ' élément de sortie 12 par l'intermédiaire du pré-amortisseur 16 et de l'amortisseur principal 14. Le pré-amortisseur 16 est destiné à amortir ou absorber les vibrations au régime de ralenti du moteur à combustion interne, l'amortisseur principal se comportant alors comme un élément rigide du fait de la raideur relativement importante des ressorts 34. Quand le couple transmis augmente, les dentures 28 et 30 sont en prise, le préamortisseur 16 est en butée et les vibrations et irrégularités de couple sont alors amorties ou absorbées par l'amortisseur principal 14 jusqu'à ce que celui-ci soit à son tour en butée. La rondelle de frottement 40 sollicitée par la rondelle élastique 42 permet de freiner les mouvements relatifs entre la rondelle de guidage 22 et le moyeu 12 lors du fonctionnement du pré-amortisseur, et la rondelle de frottement 36 sollicitée par la rondelle élastique 38 permet de freiner les mouvements relatifs entre la rondelle de guidage 22 et le voile annulaire 26 pendant le fonctionnement de l'amortisseur principal, en évitant ou en réduisant les chocs de la denture 28 du voile annulaire 26 sur la denture 30 du moyeu 12.When the friction linings 20 are clamped between the clutch pressure and reaction plates, the input element 10 is rotated by a driving shaft such as the crankshaft of an internal combustion engine and transmits a torque at one output element 12 via the pre-damper 16 and the main damper 14. The pre-damper 16 is intended to dampen or absorb vibrations at idle speed of the internal combustion engine, the main damper then behaving like a rigid element due to the relatively high stiffness of the springs 34. When the transmitted torque increases, the teeth 28 and 30 are engaged, the pre-damper 16 is in abutment and the vibrations and irregularities of the torque are then damped or absorbed by the main damper 14 until the latter is in turn in abutment. The friction washer 40 urged by the elastic washer 42 makes it possible to brake the relative movements between the guide washer 22 and the hub 12 during the operation of the pre-damper, and the friction washer 36 urged by the elastic washer 38 makes it possible to brake the relative movements between the guide washer 22 and the annular web 26 during the operation of the main damper, avoiding or reducing the impacts of the toothing 28 of the annular web 26 on the toothing 30 of the hub 12.
Dans un amortisseur de torsion de ce type, la réalisation en une pièce des rondelles de frottement 36 et 40 permet de réduire le nombre de pièces de l'amortisseur et de simplifier son montage, les rondelles de frottement 36 et 40 étant solidaires l'une de l'autre en rotation de fabrication et solidarisables très facilement en rotation avec la rondelle de guidage 22, par engagement des pions 46 dans les fenêtres 48.In a torsion damper of this type, the production in one piece of the friction washers 36 and 40 makes it possible to reduce the number of parts of the damper and to simplify its mounting, the friction washers 36 and 40 being integral with one another. on the other in manufacturing rotation and can be easily joined in rotation with the guide washer 22, by engagement of the pins 46 in the windows 48.
Comme déjà indiqué, l'invention vise à perfectionner ce concept, en améliorant ses performances et en simplifiant encore le montage d'un amortisseur de torsion du type précité, grâce à des sous-ensembles tels que ceux représentés aux figures 3 et suivantes.As already indicated, the invention aims to perfect this concept, by improving its performance and further simplifying the mounting of a torsion damper of the aforementioned type, thanks to sub-assemblies such as those shown in Figures 3 and following.
Un premier mode de réalisation de l'invention représenté aux figures 3 et 4 comprend un sous-ensemble de fabrication formé par une première rondelle de frottement 50 (correspondant à la rondelle 36 des figures 1 et 2) , une seconde rondelle de frottement 52 (correspondant à la rondelle 40 des figures 1 et 2 ) et avantageusement une rondelle élastique 54 (correspondant à la rondelle élastique 38 des figures 1 et 2) . Les rondelles de frottement 50 et 52 sont réalisées d'une seule pièce, par exemple par moulage de matière plastique, et sont reliées l'une à l'autre par des parties minces et fragiles 56 venant de fabrication, formant des pattes radiales entre la périphérie interne de la première rondelle 50 et la périphérie externe de la seconde rondelle 52 et qui sont destinées à être rompues par une poussée axiale relativement faible quand ce sous-ensemble est monté dans un amortisseur de torsion comme représenté en figure 4.A first embodiment of the invention shown in FIGS. 3 and 4 comprises a manufacturing sub-assembly formed by a first friction washer 50 (corresponding to the washer 36 in FIGS. 1 and 2), a second friction washer 52 ( corresponding to the washer 40 of Figures 1 and 2) and advantageously an elastic washer 54 (corresponding to the elastic washer 38 of Figures 1 and 2). The friction washers 50 and 52 are made in one piece, for example by plastic molding, and are connected to each other by thin and fragile parts 56 from manufacturing, forming radial lugs between the inner periphery of the first washer 50 and the outer periphery of the second washer 52 and which are intended to be broken by a relatively small axial thrust when this sub-assembly is mounted in a shock absorber twist as shown in figure 4.
La rondelle élastique 54 associée à la première rondelle 50 est maintenue en place sur celle-ci par clipsage ou encliquetage élastique, grâce à des droits axiaux 58 formés en saillie sur la face de la rondelle 50 qui reçoit la rondelle élastique 54 et qui se terminent chacun par un rebord ou crochet orienté vers 1 ' axe de la rondelle. Ces doigts d' encliquetage 58 sont radialement alignés avec des pions 60 formés en saillie sur la même face de la rondelle 50, radialement à l'extérieur des doigts 58, pour solidariser en rotation la première rondelle 50 avec la rondelle de guidage associée, désignée par la référence 62 en figure 4.The elastic washer 54 associated with the first washer 50 is held in place on the latter by elastic clipping or snap-fastening, by virtue of axial rights 58 projecting from the face of the washer 50 which receives the elastic washer 54 and which end each by a flange or hook oriented towards one axis of the washer. These snap-in fingers 58 are radially aligned with pins 60 projecting from the same face of the washer 50, radially outside the fingers 58, in order to secure in rotation the first washer 50 with the associated guide washer, designated by reference 62 in FIG. 4.
Des pattes radiales 64 sont formées en saillie sur la périphérie externe de la rondelle élastique 54 et s'étendent de part et d'autre des doigts d' encliquetage 58 et des pions 60 pour immobiliser en rotation, par coopération de formes, la rondelle élastique 54 sur la première rondelle de frottement 50. La seconde rondelle de frottement 52 comporte également, à sa périphérie externe, des pattes radiales 66 qui sont reçues, avec un jeu circonférentiel prédéterminé, dans des échancrures 68 de la périphérie interne de la première rondelle de frottement 50. Eventuellement, les pattes 66 se terminent par des bossages ou des retours axiaux 67 qui se trouveront dans le plan des échancrures 68 au montage dans l'amortisseur de torsion (voir figure 4).Radial lugs 64 are formed projecting from the outer periphery of the elastic washer 54 and extend on either side of the snap-in fingers 58 and pins 60 to immobilize in rotation, by cooperation of shapes, the elastic washer 54 on the first friction washer 50. The second friction washer 52 also has, at its outer periphery, radial tabs 66 which are received, with a predetermined circumferential clearance, in notches 68 of the inner periphery of the first washer friction 50. Optionally, the tabs 66 end in bosses or axial returns 67 which will be in the plane of the notches 68 when mounted in the torsion damper (see FIG. 4).
Dans le sous-ensemble selon l'invention, les rondelles de frottement 50 et 52 sont reliées l'une à l'autre de fabrication, et il suffit d'amener la rondelle élastique 54 sur la face de ce sous-ensemble comprenant les doigts axiaux 58 et les pions 60, puis de la pousser axialement pour écarter légèrement vers 1 ' extérieur les doigts axiaux 58 par déformation élastique, et clipser ou encliqueter la rondelle élastique 54 sur l'ensemble des rondelles 50 et 52, la rondelle élastique 54 étant retenue axialement sur la première rondelle de frottement 50 et immobilisée en rotation et centrée par engagement de ses pattes radiales 64 de part et d'autre des pions 60.In the subassembly according to the invention, the friction washers 50 and 52 are connected to each other by manufacturing, and it suffices to bring the elastic washer 54 onto the face of this sub-assembly comprising the axial fingers 58 and the pins 60, then to push it axially to slightly spread the axial fingers 58 outwards by elastic deformation, and clip or snap the elastic washer 54 onto all of the washers 50 and 52, the elastic washer 54 being retained axially on the first friction washer 50 and immobilized in rotation and centered by engagement of its radial lugs 64 on either side other of pawns 60.
Au montage (figure 4), ce sous-ensemble est monté sur un moyeu 70 dont la surface périphérique externe comporte un épaulement annulaire sur lequel s'applique la seconde rondelle de frottement 52. Il suffit de pousser axialement sur la première rondelle de frottement 50 pour rompre les pattes 56 qui la relient à la seconde rondelle de frottement 52, ce qui a également pour effet d'appliquer la première rondelle de frottement 50 sur une face d'un voile annulaire 72 doté d'une denture interne engagée avec un jeu circonferentiel prédéterminé sur une denture externe 74 du moyeu 70.During assembly (FIG. 4), this sub-assembly is mounted on a hub 70, the external peripheral surface of which comprises an annular shoulder on which the second friction washer 52 is applied. It suffices to push axially on the first friction washer 50 to break the tabs 56 which connect it to the second friction washer 52, which also has the effect of applying the first friction washer 50 to one face of an annular web 72 with internal teeth engaged with play predetermined circumferential on an external toothing 74 of the hub 70.
Une rondelle élastique 76 ayant une raideur inférieure à celle de la rondelle 54, est posée sur la face libre de la seconde rondelle de frottement 52, pour être maintenue entre cette rondelle et la rondelle de guidage 62 formée avec des fenêtres 78 dans lesquelles sont engagés les pions 60 de la première rondelle de frottement 50.An elastic washer 76 having a stiffness less than that of the washer 54, is placed on the free face of the second friction washer 52, to be held between this washer and the guide washer 62 formed with windows 78 in which are engaged the pins 60 of the first friction washer 50.
Avantageusement, ces fenêtres 78 ont une dimension radiale suffisante pour recevoir des pattes radiales extérieures 80 de la rondelle élastique 76 et l'immobiliser en rotation par rapport à la rondelle de guidage 62. Les fenêtres 78 ont une forme oblongue ou sensiblement rectangulaire . Ainsi, grâce au sous-ensemble selon l'invention, la première rondelle de frottement 50 est immobilisée en rotation par rapport à la rondelle de guidage 62 par simple introduction des pions 60 dans les fenêtres 78 de la rondelle de guidage, la rondelle élastique 54 associée à la première rondelle de frottement est retenue axialement et immobilisée en rotation sur celle-ci, la seconde rondelle de frottement 52 est indépendante de la première rondelle de frottement 50 et peut donc avoir un comportement différent, tout en étant immobilisée en rotation sur celle- ci avec un jeu circonferentiel prédéterminé, et la rondelle élastique 76 associée à la seconde rondelle de frottement 52 est immobilisée en rotation par la rondelle de guidage 62. On notera que les doigts axiaux 58 d' encliquetage de la rondelle élastique 54 s'étendent dans les fenêtres 78 de la rondelle de guidage 62 et peuvent donc avoir une hauteur (ou dimension le long de l'axe de rotation) optimale, parfaitement adaptée à 1 ' encliquetage et à la retenue axiale de la rondelle élastique 54.Advantageously, these windows 78 have a radial dimension sufficient to receive external radial lugs 80 of the elastic washer 76 and immobilize it in rotation relative to the guide washer 62. The windows 78 have an oblong or substantially rectangular shape. Thus, thanks to the sub-assembly according to the invention, the first friction washer 50 is immobilized in rotation relative to the guide washer 62 by simple introduction of the pins 60 into the windows 78 of the guide washer, the elastic washer 54 associated with the first friction washer is retained axially and immobilized in rotation on the latter, the second friction washer 52 is independent of the first friction washer 50 and can therefore have a different behavior, while being immobilized in rotation on that - This with a predetermined circumferential clearance, and the elastic washer 76 associated with the second friction washer 52 is immobilized in rotation by the guide washer 62. It will be noted that the axial fingers 58 of snap-fastening of the elastic washer 54 extend in the windows 78 of the guide washer 62 and can therefore have an optimal height (or dimension along the axis of rotation), pa perfectly adapted to snap-fastening and axial retention of the elastic washer 54.
Par ailleurs, et comme on le voit bien sur la figure 4, l'invention permet également de réduire l'encombrement axial de l'amortisseur de torsion.Furthermore, and as can be seen in FIG. 4, the invention also makes it possible to reduce the axial size of the torsional damper.
Dans la variante de réalisation représentée en figure 6, les pions 60 formés sur la première rondelle de frottement 50 ont une section sensiblement en U, ouverte en direction de l'axe de rotation, ce qui permet de former les doigts axiaux 58 d' encliquetage de la rondelle élastique 54 à l'intérieur de ces pions 60. Il est ainsi formé une mortaise grâce à la section en U.In the alternative embodiment shown in Figure 6, the pins 60 formed on the first friction washer 50 have a substantially U-shaped section, open towards the axis of rotation, which allows to form the axial fingers 58 snap of the elastic washer 54 inside these pins 60. A mortise is thus formed by virtue of the U-shaped section.
La rondelle élastique 54 comporte, à sa périphérie extérieure, des pattes radiales 82 qui sont logées à l'intérieur des pions 60 dans les mortaises précitées et viennent s ' encliqueter à leur extrémité sur les doigts REVENDICATIONSThe elastic washer 54 has, at its outer periphery, radial tabs 82 which are housed inside the pins 60 in the aforementioned mortises and snap at their ends on the fingers CLAIMS
1 - Amortisseur de torsion comprenant un élément d'entrée relié à un élément de sortie par un amortisseur principal et par un pré-amortisseur, l'amortisseur principal comprenant un voile annulaire (72) relié à l'élément d'entrée par des organes élastiquement déformables à action circonférentielle et des premiers moyens de frottement (50) interposés avec des premiers moyens (54) de serrage élastique à action axiale entre le voile (72) et une rondelle de guidage (62) solidaire de l'élément d'entrée, le pré-amortisseur comprenant un élément annulaire solidaire du voile (72) ou formé par ce dernier et relié à l'élément de sortie (70) par d'autres organes élastiquement déformables à action circonférentielle, et des seconds moyens de frottement (52) interposés avec des seconds moyens (76) de serrage élastique à action axiale entre l'élément de sortie (70) et la rondelle de guidage (62) précitée, les premier et second moyens de frottement comprenant deux rondelles (50, 52) dont l'une entoure l'autre et est solidaire en rotation de la rondelle de guidage (62), caractérisé en ce que les deux rondelles de frottement (50, 52) sont reliées de fabrication l'une à l'autre par des parties fragiles de matière (56) qui sont rompues au montage sur l'amortisseur pour séparer les rondelles (50, 52) l'une de l'autre.1 - Torsional damper comprising an input element connected to an output element by a main damper and by a pre-damper, the main damper comprising an annular web (72) connected to the input element by members elastically deformable with circumferential action and first friction means (50) interposed with first elastic clamping means (54) with axial action between the web (72) and a guide washer (62) integral with the input element , the pre-damper comprising an annular element integral with the web (72) or formed by the latter and connected to the outlet element (70) by other elastically deformable members with circumferential action, and second friction means (52 ) interposed with second elastic clamping means (76) with axial action between the outlet element (70) and the aforementioned guide washer (62), the first and second friction means comprising d them washers (50, 52), one of which surrounds the other and is integral in rotation with the guide washer (62), characterized in that the two friction washers (50, 52) are connected by manufacturing one to the other by fragile parts of material (56) which are broken when mounted on the damper to separate the washers (50, 52) from one another.
2 - Amortisseur selon la revendication 1, caractérisé en ce que, après montage, les deux rondelles de frottement (50, 52) restent liées l'une à l'autre en rotation par coopération de formes .2 - Damper according to claim 1, characterized in that, after assembly, the two friction washers (50, 52) remain linked to each other in rotation by cooperation of shapes.
3 - Amortisseur selon la revendication 2, caractérisé en ce que la périphérie interne de la première rondelle de frottement (50) et la périphérie externe de la seconde rondelle de frottement (52) ont des formes crénelées et conjuguées qui engrènent l'une avec l'autre.3 - Shock absorber according to claim 2, characterized in that the internal periphery of the first washer of friction (50) and the outer periphery of the second friction washer (52) have crenellated and conjugate shapes which mesh with each other.
4 - Amortisseur selon l'une des revendications 1 à 3, caractérisé en ce que la première rondelle de frottement (50) comporte, sur sa face tournée vers la rondelle de guidage (62), des moyens (58) de retenue axiale d'une rondelle élastique (54) faisant partie des premiers moyens de serrage axial .4 - Shock absorber according to one of claims 1 to 3, characterized in that the first friction washer (50) comprises, on its face facing the guide washer (62), means (58) for axial retention of an elastic washer (54) forming part of the first axial clamping means.
5 - Amortisseur selon la revendication 4, caractérisé en ce que lesdits moyens de retenue axiale comprennent des doigts axiaux (58) d' encliquetage élastique sur la périphérie de ladite rondelle élastique (54) .5 - Shock absorber according to claim 4, characterized in that said axial retaining means comprise axial fingers (58) of elastic snap-fastening on the periphery of said elastic washer (54).
6 - Amortisseur selon la revendication 4, caractérisé en ce que ladite rondelle élastique (54) est immobilisée en rotation sur la première rondelle de frottement (50) par coopération de formes.6 - Shock absorber according to claim 4, characterized in that said elastic washer (54) is immobilized in rotation on the first friction washer (50) by cooperation of shapes.
7 - Amortisseur selon la revendication 4, caractérisé en ce que lesdits moyens (58) de retenue axiale sont radialement alignés avec des moyens, tels par exemple que des pions (60), formés sur la première rondelle de frottement (50) pour la solidariser en rotation avec la rondelle de guidage (62).7 - Shock absorber according to claim 4, characterized in that said means (58) of axial retention are radially aligned with means, such as for example pins (60), formed on the first friction washer (50) to secure it in rotation with the guide washer (62).
8 - Amortisseur selon la revendication 7, caractérisé en ce que les pions (60) de la première rondelle de frottement (50) ont en section une forme de U ou analogue à l'intérieur de laquelle s'étend un doigt axial (58) d' encliquetage élastique sur une patte radiale (82) de ladite rondelle élastique (54). 9 - Amortisseur selon la revendication 1, caractérisé en ce que la seconde rondelle de frottement (52) est immobilisée en rotation, par coopération de formes, par ladite rondelle élastique (54) et comprend par exemple des pattes radiales (66, 90) à sa périphérie externe, engagées dans des échancrures (88) de la périphérie interne de ladite rondelle élastique (54) .8 - Shock absorber according to claim 7, characterized in that the pins (60) of the first friction washer (50) have in section a U-shape or the like inside which extends an axial finger (58) elastic snap on a radial tab (82) of said elastic washer (54). 9 - Shock absorber according to claim 1, characterized in that the second friction washer (52) is immobilized in rotation, by cooperation of shapes, by said elastic washer (54) and comprises for example radial lugs (66, 90) to its outer periphery, engaged in notches (88) of the inner periphery of said elastic washer (54).
10 - Amortisseur selon la revendication 1, caractérisé en ce que ladite rondelle de guidage (62) comprend des lumières ou fenêtres (78) dans lesquelles sont engagés des moyens (60) de liaison en rotation avec la première rondelle de frottement (50) et des pattes radiales (80) d'une autre rondelle élastique (76) faisant partie des moyens de serrage de la seconde rondelle de frottement (52).10 - Shock absorber according to claim 1, characterized in that said guide washer (62) comprises lights or windows (78) in which are engaged means (60) for rotationally connecting with the first friction washer (50) and radial lugs (80) of another elastic washer (76) forming part of the means for clamping the second friction washer (52).
11 - Ensemble de rondelles de frottement pour un amortisseur de torsion du type décrit dans la revendication11 - Set of friction washers for a torsion damper of the type described in the claim
1, caractérisé en ce qu'il comprend deux rondelles coaxiales (50, 52) sensiblement coplanaires et reliées l'une à l'autre par des parties fragiles (56) de matière venant de fabrication.1, characterized in that it comprises two coaxial washers (50, 52) substantially coplanar and connected to each other by fragile parts (56) of material from manufacturing.
12 - Ensemble de rondelles selon la revendication 11, caractérisé en ce qu'il est réalisé d'une pièce par moulage de matière plastique.12 - set of washers according to claim 11, characterized in that it is made in one piece by plastic molding.
13 - Ensemble de rondelles selon la revendication 11, caractérisé en ce que l'une des rondelles de frottement précitées comprend des moyens (58, 60) de retenue axiale et d'immobilisation en rotation d'une rondelle élastique (54). 13 - set of washers according to claim 11, characterized in that one of the abovementioned friction washers comprises means (58, 60) for axial retention and immobilization in rotation of an elastic washer (54).
PCT/FR2000/000773 1999-03-30 2000-03-28 Torsion shock absorber for a clutch and set of friction washers for said torsion shock absorber WO2000060252A1 (en)

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BR0005572-7A BR0005572A (en) 1999-03-30 2000-03-28 Torsion damper and washers set.
JP2000609716A JP4933695B2 (en) 1999-03-30 2000-03-28 Torsion shock absorber for clutch and friction washer assembled for the torsion shock absorber
DE10080940T DE10080940B3 (en) 1999-03-30 2000-03-28 Torsion damper for a clutch and a friction disc group for this torsion damper

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FR99/04122 1999-03-30
FR9904122A FR2791750B1 (en) 1999-03-30 1999-03-30 TORSION SHOCK ABSORBER FOR CLUTCH, AND FRICTION WASHER ASSEMBLY FOR THIS TORSION SHOCK ABSORBER

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FR2826083B1 (en) 2001-06-15 2003-08-08 Valeo IMPROVED TORSION DAMPING DEVICE
EP1616551A1 (en) 2004-07-13 2006-01-18 L'oreal Cosmetic treatment for preventing or delaying the signs of skin ageing
FR2878745B1 (en) 2004-12-07 2007-03-09 Oreal TRANSUNGEAL DEVICE
FR2909552B1 (en) 2006-12-12 2009-11-20 Oreal COSMETIC USE OF ANISIC ACID TO PROMOTE DESQUACATION

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Publication number Priority date Publication date Assignee Title
FR2741925A1 (en) * 1995-12-04 1997-06-06 Valeo TORSION DAMPING DEVICE, ESPECIALLY FOR A MOTOR VEHICLE

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Publication number Priority date Publication date Assignee Title
FR2733809B1 (en) * 1995-05-02 1997-06-13 Valeo TORSION SHOCK ABSORBER WITH CONTROL WASHER, PARTICULARLY CLUTCH FRICTION FOR MOTOR VEHICLE
JPH10103407A (en) * 1996-09-27 1998-04-21 Exedy Corp Damper mechanism
JP3775002B2 (en) * 1997-07-31 2006-05-17 東芝ライテック株式会社 Pinch type fluorescent lamp socket

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741925A1 (en) * 1995-12-04 1997-06-06 Valeo TORSION DAMPING DEVICE, ESPECIALLY FOR A MOTOR VEHICLE

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FR2791750A1 (en) 2000-10-06
BR0005572A (en) 2001-03-06
JP4933695B2 (en) 2012-05-16
KR20010052405A (en) 2001-06-25
DE10080940B3 (en) 2012-04-19
FR2791750B1 (en) 2001-05-18
DE10080940T1 (en) 2001-06-13
JP2002541397A (en) 2002-12-03
KR100634274B1 (en) 2006-10-16
WO2000060252A9 (en) 2001-11-22

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