WO2000039482A1 - Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile - Google Patents
Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile Download PDFInfo
- Publication number
- WO2000039482A1 WO2000039482A1 PCT/FR1999/003047 FR9903047W WO0039482A1 WO 2000039482 A1 WO2000039482 A1 WO 2000039482A1 FR 9903047 W FR9903047 W FR 9903047W WO 0039482 A1 WO0039482 A1 WO 0039482A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hub
- teeth
- damper
- shock absorber
- ring
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—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
- 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
- F16F15/1207—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 the supporting arrangement of the damper unit
Definitions
- Torsional damper for a clutch in particular for a motor vehicle
- the invention relates to a torsional damper for a clutch, in particular for a motor vehicle.
- a torsion damper of this type comprises a main damper interposed between an input element such as a clutch disc or a disc integral with a flywheel and a annular web surrounding a hub which can be joined in rotation with a driven shaft, teeth being formed on the web and the hub to mesh with a predetermined circumferential play.
- a pre-damper is interposed between the web and the hub to dampen vibrations at idle speed of an internal combustion engine associated with the clutch.
- annular part integral in rotation with the annular web is interposed between this web, the hub and a guide washer integral with the clutch disc, to serve both as a friction member between the annular web and the hub , outer cylindrical cage of the pre-damper and centering bearing of the guide washer.
- this annular part no longer forms the external cage of the pre-shock absorber and the elastic members with circumferential action, such as helical springs, of the pre-shock absorber are housed in notches formed in the teeth of the web and of the hub, this which limits the number of elastic members of the pre-shock absorber and also reduces the number of teeth in the teeth of the web and the hub, to the detriment of their strength and their service life.
- the present invention aims to collect and combine, in a torsion damper of the aforementioned type, the respective advantages of these known embodiments, while simplifying the structure and assembly of the torsion damper.
- a torsional damper for a clutch in particular for a motor vehicle, comprising a main damper interposed between an input element and an annular web surrounding a hub which can be secured in rotation with a driven shaft, teeth formed on the web and the hub for meshing with a predetermined circumferential play, a pre-damper interposed between the web and the hub and a centering bearing of a guide washer integral with the input element, this bearing being clamped axially between the washer guide and shoulder of the hub, characterized in that the bearing is formed of a cylindrical ring independent of the annular web and rotatably mounted on the hub, this ring comprising a toothing meshing with that of the hub with a circumferential clearance less than the clearance cited above between the teeth of the web and of the hub, so as to constitute
- the guide ring of the input element is centered on the hub by means of a cylindrical ring rotatably mounted on the hub, this ring can be made of a material different from that of the hub. and better suited to functions it must fulfill.
- the axial tightening of the ring between the hub and the guide washer makes it possible, by friction, to dampen the vibrations absorbed by the pre-damper during its operation.
- the guide washer being integral in rotation with the annular web during the operation of the pre-damper, the meshing of the teeth of the ring with the teeth of the hub allows, in association with the friction due to the axial tightening of the ring between the washer guide and the hub, to brake and absorb the shocks of the toothing of the web on that of the hub.
- This arrangement also simplifies the pre-damper since it no longer has to provide a bearing function.
- the toothing of said ring is formed on an annular peripheral zone of its end facing the abovementioned shoulder and comprises teeth which extend axially beyond the shoulder between the teeth. of the hub teeth.
- This arrangement makes it possible to reduce the radial or transverse size of this ring.
- the aforementioned ring is mounted on the hub between the guide washer of the input element and an internal cylindrical cage of the pre-damper, this cage being integral in rotation with the hub and comprising on its external peripheral surface notches forming housings of the elastic members of the pre-damper, the part of this cage facing the aforementioned ring including a cylindrical recess in which the teeth of the ring extend axially.
- the internal cylindrical cage of the pre-damper comprises on its internal surface radial teeth which mesh substantially without play with the toothing of the hub and which are angularly aligned with the notches for housing the elastic members of the pre-damper.
- the elastic members of the pre-damper on a small diameter around the axis of rotation and therefore to reduce their sensitivity to centrifugal forces, and to reinforce the mechanical resistance of this cage, the radial teeth of the internal surface providing an extra thickness of material at the notches housing the elastic members.
- the cylindrical wall of the recess formed in the internal cage of the pre-damper comprises clearance openings at the level of the teeth of the above-mentioned cylindrical ring.
- FIG. 2 is a schematic exploded perspective view of three coaxial parts of this damper.
- the torsional damper is of the general type described in documents WO-9614521 and EP-0488859, the contents of which are incorporated in the present description by reference, this torsional damper essentially comprising an input element constituted here by a clutch disc 10 carrying at its outer periphery friction linings (not shown) and making it possible to transmit a torque between, on the one hand, a driving shaft such as the crankshaft of an internal combustion engine, and, on the other hand, a driven shaft such as the input shaft of a gearbox, this driven shaft being secured in rotation, for example by means of splines, with a cylindrical hub 12 which extends through a central opening 14 of the clutch disc.
- This clutch disc 10 is fixed, at its internal periphery, to a guide washer 16, which is centered on the hub 12 by means described in more detail below and which is associated by a main damper (including the elastic members are not shown) to an annular web surrounding the hub 12 at a distance and disposed between the first guide washer 16 and another guide washer 20 which is parallel to the first and which is fixed to the latter by small columns (not shown) extending in corresponding holes 22, 24 of the two guide washers and in slots 26 of the annular web 18, allowing a limited angular movement of the web 18 relative to the washers 16 and 20.
- the web 18 and the washers 16 and 20 belong to the main damper.
- the main damper also comprises elastic members with circumferential action, such as helical springs for example, having a relatively high stiffness and making it possible to absorb vibrations and oscillations between the washers 16 and 20 and the web 18 , these elastic members being housed partly in orifices made in the washers and partly in the openings of the web 18 so that a relative rotation of the web 18 relative to the washers 16 and 20 in one direction or the other results in compression or relaxation, respectively, of these elastic members.
- the orifices here consist of windows, not shown.
- a pre-damper 28 is interposed between the annular web 18 and the hub 12, this pre-damper comprising elastic members with circumferential action, such as helical springs 30 of low stiffness, which are intended to absorb the vibrations or oscillations between the web 18 and the hub 12 at the idle speed of an internal combustion engine.
- the pre-damper 28 also comprises an external annular cage 32 which is here made of moldable plastic and an internal annular cage 34 made of moldable plastic or sintered material, the cylindrical facing surfaces of which include radial teeth delimiting notches for housing the springs 30, the external cage 32 being fixed in rotation with the annular web 18 by means of axial fingers 36 projecting from its external periphery and received in corresponding orifices in the web 18, the internal cage 34 being fixed in rotation with the hub 12, by means of radial teeth 38 projecting from the internal surface of the cage 34 and engaged between radial teeth 40 of the external surface of the hub 12.
- the teeth 40 of the hub are connected axially, by shoulders 42, to other teeth 44 having a radial height on the external surface of the hub 12 greater than that of the teeth 40.
- Friction washers 48 and 50 are interposed between the second guide washer 20 and a radial surface of the hub 12, and between the guide washer 20 and the web annular 18, respectively, the washer 48 being integral in rotation with the guide washer 20 and applied under pressure to the hub 12 by an elastic washer 52 such as a Belleville washer for example, the other washer 50 being integral in rotation with the second guide washer 20 and being applied under pressure to the annular web 18 by an elastic washer 54 such as a Belleville washer.
- the friction of the washer 48 on the hub 12 contributes to the damping of the vibrations absorbed by the pre-damper 28, and the friction of the washer 50 on the annular web 18 to the damping of the vibrations and oscillations absorbed by the main damper.
- the washers 48 and 50 here made of plastic, comprise pins for connection in rotation with the guide washer 20.
- the impacts of the teeth 46 of the web on the teeth 44 of the hub 12 are braked and damped by means of a cylindrical ring 56 which is rotatably mounted on a cylindrical end portion 58 of the hub 12 connected to the teeth 40 mentioned above by a shoulder 60 forming an axial positioning stop for the ring 56.
- This ring which comes to bear on the shoulder 60, is formed with axial teeth 62 which extend beyond the shoulder 60 and which are engaged between the teeth 40 of the hub 12 with a circumferential clearance predetermined, less than the circumferential clearance existing between the teeth 46 of the annular web 18 and the teeth 44 of the hub 12.
- the cylindrical ring 56 is axially clamped on the shoulder
- the surfaces in contact with the ring 56 and the guide washer 16 are frustoconical or alternatively of spherical shape and conjugate, which makes it possible to center the guide washer 16 on the hub 12 by means of a bearing.
- the axial teeth 62 of the ring 56 are received in a cylindrical recess 64 of the internal surface of the cage 34 of the pre-damper, the internal diameter of the cylindrical surface of this recess being substantially equal to or very slightly greater than the diameter external of the teeth 62.
- the axial length of the cylindrical recess 64 is substantially equal to the axial length of the teeth 62, so that this recess extends from one end of the cage 34 over only part of the axial length of this cage.
- clearance openings 66 are formed in this cylindrical wall, substantially in the middle of the notches 68 in which are housed the elastic members of the pre-damper 28.
- 1 torsion damper is as follows, in the case where this damper is part of a clutch for an internal combustion engine of a motor vehicle: at idle speed of the internal combustion engine, the guide washers 16 and 20 and the annular web 18 are integral in rotation and the engine torque applied to the clutch disc 10 is transmitted to the hub 12 via the pre-damper 28, the elastic members 30 of which absorb vibrations or transmission oscillations.
- the ring 56 is integral in rotation with the first guide washer 16 and rotates or oscillates relative to the hub 12 as a function of the vibrations or oscillations absorbed by the elastic members 30, these parasitic vibrations being absorbed by the friction resulting from the axial tightening of the ring 56 and the washer 48 on the hub 12.
- the elastic members 30 of the pre-damper 28 are more compressed and the ring 56 rotates with the annular web 18 and the guide washers 16 and 20 relative to to the hub 12 until its teeth 62 abut on teeth 40 of the hub 12.
- the teeth 46 of the annular web 18 are further apart from the teeth 44 of the hub, the circumferential clearance between these teeth being greater to the circumferential clearance between the teeth 62 and 40.
- the ring 56 remains immobilized in rotation relative to the hub 12 and the assembly formed by the guide washers 16 and 20 and the annular web 18 rotates relative to the hub 12 until the teeth 46 of the annular web 18 abut on the teeth 44 of the hub 12, this abutment being however braked and damped by the friction of the ring 56 on the first guide washer 16.
- the annular web 18, the hub 12 and the ring 56 are integral in rotation, the teeth 46 of the web being in abutment on the teeth 44 of the hub and the teeth 62 of the ring 56 being in abutment on the teeth 40 of the hub, and the oscillations and vibrations of transmission are then absorbed by the elastic members of the main damper interposed between the guide washers 16 and 20 and the annular web 18 and are damped by friction of the washer 50 on the wall 18 and cage 32 on the guide washer 16.
- the ring 56 can be made of any material suitable for its functions as a conical bearing and of a friction member, for example made of a plastic material.
- the internal annular cage 34 of the pre-shock absorber and its external cage 32 which has a friction function between the annular web 18 and the first guide washer 16 during the operation of the main shock absorber, can be made of a material suitable such as plastic. It is the same for the friction washers 48 and 50 interposed between the second guide washer 20 and the hub 12 and between this second guide washer and the annular web 18, respectively.
- the input element can of course be constituted by a disc (or an extension of the guide washer 16) secured to a flywheel.
- the external cage 32 is in a metallic variant, which makes it possible to reduce the bulk.
- the transverse part of the metal cage 32, which is in contact with the guide washer, is in one embodiment covered with a plastic layer.
- the helical springs can be curved springs, the internal cage 34 having for example two radial teeth between which two curved springs are housed.
- the external cage 32 then has two radial teeth in circumferential alternation with the teeth of the internal cage 34.
- the springs bear at their circumferential ends on the radial teeth, directed radially in opposite directions, of the cages 32, 34. Between two teeth the cages 32, 34 have at their periphery a cylindrical shape.
- the springs can be replaced by blocks of elastic material. Note that the radial teeth of the outer cage 32 are easily obtained by stamping when the cage is metallic.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19982947T DE19982947B4 (de) | 1998-12-24 | 1999-12-07 | Torsiondämpfer für eine Kupplung, insbesondere für Kraftfahrzeuge |
MXPA00008261A MXPA00008261A (es) | 1998-12-24 | 1999-12-07 | Amortiguador de torsion para embrague, en particular para automovil. |
HU0101088A HU222142B1 (hu) | 1998-12-24 | 1999-12-07 | Torziós rezgéscsillapító tengelykapcsolóhoz |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9816519A FR2787845B1 (fr) | 1998-12-24 | 1998-12-24 | Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile |
FR98/16519 | 1998-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000039482A1 true WO2000039482A1 (fr) | 2000-07-06 |
Family
ID=9534573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/003047 WO2000039482A1 (fr) | 1998-12-24 | 1999-12-07 | Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile |
Country Status (6)
Country | Link |
---|---|
KR (1) | KR100602311B1 (fr) |
DE (1) | DE19982947B4 (fr) |
FR (1) | FR2787845B1 (fr) |
HU (1) | HU222142B1 (fr) |
MX (1) | MXPA00008261A (fr) |
WO (1) | WO2000039482A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181817A (en) * | 1985-10-19 | 1987-04-29 | Fichtel & Sachs Ag | Torsional vibration damper |
EP0488859A1 (fr) | 1990-11-28 | 1992-06-03 | Valeo | Dispositif amortisseur de torsion, notamment pour disque d'embrayage de vehicule automobile |
DE19522225A1 (de) * | 1994-06-30 | 1996-01-04 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
WO1996014521A1 (fr) | 1994-11-08 | 1996-05-17 | Valeo | Amortisseur de torsion, notamment friction d'embrayage pour vehicule automobile |
DE19626687A1 (de) * | 1995-07-14 | 1997-01-16 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
DE19753557A1 (de) * | 1996-12-11 | 1998-06-18 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2616499B1 (fr) * | 1987-06-10 | 1991-06-28 | Valeo | Disque de friction d'embrayage comprenant un amortisseur principal et un pre-amortisseur, avec des voiles respectifs qui sont adjacents |
DE3743075A1 (de) * | 1987-12-18 | 1989-06-29 | Fichtel & Sachs Ag | Torsionsschwingungsdaempfer mit waelzlagerung |
DE19524749C1 (de) * | 1995-07-07 | 1996-07-11 | Fichtel & Sachs Ag | Kupplungsscheibe mit Torsionsschwingungsdämpfer für Kraftfahrzeugkupplungen |
FR2746472B1 (fr) * | 1996-03-22 | 1998-04-24 | Valeo | Amortisseur de torsion a rondelle entretoise, notamment pour vehicule automobile |
FR2759750B1 (fr) * | 1997-02-14 | 1999-05-07 | Valeo | Moyeu pour preamortisseur notamment pour vehicule automobile, et dispositif amortisseur de torsion comportant un tel moyeu |
FR2764018B1 (fr) * | 1997-05-30 | 1999-08-06 | Valeo | Dispositif amortisseur de torsion, notamment pour friction d'embrayage de vehicule automobile |
FR2797010B1 (fr) * | 1999-07-30 | 2001-11-02 | Valeo | Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile |
-
1998
- 1998-12-24 FR FR9816519A patent/FR2787845B1/fr not_active Expired - Fee Related
-
1999
- 1999-12-07 WO PCT/FR1999/003047 patent/WO2000039482A1/fr active IP Right Grant
- 1999-12-07 DE DE19982947T patent/DE19982947B4/de not_active Expired - Fee Related
- 1999-12-07 MX MXPA00008261A patent/MXPA00008261A/es not_active Application Discontinuation
- 1999-12-07 KR KR1020007009194A patent/KR100602311B1/ko active IP Right Grant
- 1999-12-07 HU HU0101088A patent/HU222142B1/hu not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181817A (en) * | 1985-10-19 | 1987-04-29 | Fichtel & Sachs Ag | Torsional vibration damper |
EP0488859A1 (fr) | 1990-11-28 | 1992-06-03 | Valeo | Dispositif amortisseur de torsion, notamment pour disque d'embrayage de vehicule automobile |
DE19522225A1 (de) * | 1994-06-30 | 1996-01-04 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
WO1996014521A1 (fr) | 1994-11-08 | 1996-05-17 | Valeo | Amortisseur de torsion, notamment friction d'embrayage pour vehicule automobile |
DE19626687A1 (de) * | 1995-07-14 | 1997-01-16 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
DE19753557A1 (de) * | 1996-12-11 | 1998-06-18 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
Also Published As
Publication number | Publication date |
---|---|
HU222142B1 (hu) | 2003-04-28 |
FR2787845B1 (fr) | 2001-02-02 |
HUP0101088A3 (en) | 2002-01-28 |
MXPA00008261A (es) | 2002-04-24 |
DE19982947B4 (de) | 2009-01-29 |
DE19982947T1 (de) | 2001-06-13 |
KR20010041145A (ko) | 2001-05-15 |
KR100602311B1 (ko) | 2006-07-14 |
HUP0101088A2 (hu) | 2001-08-28 |
FR2787845A1 (fr) | 2000-06-30 |
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