WO2000029761A1 - Amortisseur de torsion pour disque d'embrayage a friction - Google Patents
Amortisseur de torsion pour disque d'embrayage a friction Download PDFInfo
- Publication number
- WO2000029761A1 WO2000029761A1 PCT/FR1999/002822 FR9902822W WO0029761A1 WO 2000029761 A1 WO2000029761 A1 WO 2000029761A1 FR 9902822 W FR9902822 W FR 9902822W WO 0029761 A1 WO0029761 A1 WO 0029761A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hub
- ring
- shock absorber
- toothing
- teeth
- 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
Definitions
- the present invention relates to a torsion damper, in particular for a friction clutch disc, in particular for a motor vehicle.
- the outer surface of the ring comprises a toothing which meshes with a circumferential clearance with another toothing formed on the internal periphery of an annular web surrounding the hub and connected in rotation to the clutch disc, certain teeth of the toothing of the ring and veil delimiting indentations in which are accommodated elastic means with circumferential action, such as helical springs, which constitute a pre-damper between the hub and the veil, making it possible to at least partially dampen vibrations at engine idling speed thermal associated with 1 clutch.
- a main shock absorber arranged between the wall and the support and guide washers of the clutch disc makes it possible to dampen the vibrations and the transmission shocks for the other engine operating regimes.
- the pre-shock absorber and the main shock absorber are in the same radial plane with respect to the axis of rotation and the number of springs of the pre-shock absorber is limited by the fact that the abovementioned teeth of the ring and of the web have a dual function of meshing and housing the prelock springs.
- the object of the invention is in particular to improve the device described above. It relates to a shock absorber of the aforementioned type, comprising a pre-shock absorber the number of springs of which is not limited.
- a shock absorber of this type in which the pre-damping and meshing functions with circumferential clearance between the web and the hub are separated from one another.
- a torsional damper in particular for a friction clutch disc, comprising a pre-damper acting between a hub intended to be secured in rotation to a driven shaft and an annular web surrounding the hub, teeth formed.
- the hub has an attached cylindrical ring whose inner surface comprises a toothing meshing substantially without play with the aforementioned toothing of the hub, and whose outer surface comprises a toothing delimiting notches in which are housed elastic means with circumferential action of the pre-damper.
- the toothing of the hub which meshes with that of the annular web to form a drive with circumferential clearance between the web and the hub, and it is the toothing of the added ring which is used for the housing. elastic means of the pre-damper.
- the corresponding means can be dissociated and axially offset with respect to each other.
- the number of elastic means of the pre-shock absorber is not limited and the engagement function with circumferential play can be ensured with a larger number of teeth, which is favorable for a longer service life. Alternatively, the number of teeth to increase the angular movement between the web and the hub.
- the mounting of the ring on the hub is simplified, because the connection in rotation of the ring and the hub is ensured by meshing two teeth and no longer by means of axial locking of the ring on the hub.
- the meshing of the teeth also allows angular indexing of the ring relative to the hub and to the web.
- the ring simplifies the hub since it is attached to it.
- This ring can therefore include for example a frustoconical bearing by a centering bearing provided with a frustoconical bearing.
- the teeth of the internal toothing of the ring are angularly aligned with the notches of its external toothing, which makes it possible to increase the resistance of the ring and to install the springs of the pre- shock absorber on a cylindrical surface of smaller diameter
- the internal surface of the added ring includes a shoulder abutting on a shoulder on the outside surface of the hub, and defining the axial position of the ring on the hub.
- the teeth of the aforementioned toothing of the hub are in two axially aligned parts of different radial height, interconnected by a shoulder, the first parts of these teeth meshing with the aforementioned toothing of the web and the second parts with the toothing of the inner surface of the added ring, the shoulders between these two parts defining an axial position of the ring on the hub.
- the elastic means of the pre-shock absorber are also housed in notches of a cylindrical surface which surrounds the external toothing of said ring and which is part of a bearing for centering the web and the disc. clutch on the hub.
- this bearing which is used for centering the disc and the web, can also serve as a friction means between the web and a guide washer integral with the clutch disc and between this guide washer and the ring attached to the hub, and is also part of the constituent means of the pre-damper.
- the centering bearing is in one piece in one embodiment.
- it is bi-material, the notches being produced by stamping in a metal part on which the bearing itself is fixed, for example by overmolding.
- the ring attached to the hub comprises a frustoconical bearing surface for supporting and guiding a corresponding frustoconical part of said bearing.
- the ring attached to the hub can be made of any material, the choice of which depends on the desired coefficient of friction between the ring and the abovementioned bearing in order to dampen vibrations well. It can in particular be made of a sintered material, for example of the same type as that of the hub, or of a plastic material, possibly loaded for greater mechanical resistance.
- FIG. 1 is a schematic front view of a hub comprising a cylindrical ring added in accordance with the invention
- FIG. 2 is a schematic sectional view along the line II-II of Figure 1;
- - Figure 3 is a schematic exploded perspective view of the hub and the ring;
- FIG. 4 is a schematic view in axial section of a torsion damper according to the invention.
- a cylindrical hub 10 whose internal surface has longitudinal grooves 12 for its rotational connection with a driven shaft (such as that shown in phantom in Figure 4), comprises on its external surface a toothing 14 whose teeth have a trapezoidal cross section and are each formed of two axially aligned portions 16, 18 which have different radial heights with respect to the axis 20 of the hub and which are connected to each other by a transverse shoulder 22, the parts 18 of the teeth having a radial height less than that of the parts 16 of these teeth.
- the teeth 14 are formed in a thicker intermediate part of the outer peripheral surface of the hub 10, at a distance from its two front ends 24 and 26.
- a cylindrical ring 28 which may be metallic, or plastic or sintered material for reasons of simplification of manufacture, is attached to the hub 10, on the side of the parts 18 of the teeth 14 and comprises a stepped internal surface, formed of two cylindrical parts 30 and 32 of different diameter connected together by a transverse shoulder 34.
- the cylindrical part 30 has an internal diameter very slightly greater than the diameter of the external cylindrical surface 36 of the hub 10, and the cylindrical part 32 has an internal diameter very slightly greater than the diameter of the peripheral surface of the parts 18 of the teeth 14 of the hub 10, to allow mounting of the ring 28 on the hub 10 by fitting with little play, the internal shoulder 34 of the ring 28 coming from '' apply to the corresponding end face of the teeth 14, while the front end of the second part 32 of the ring 28 comes bu ter on the shoulders 22 of the teeth 14 of the hub 10.
- the ring 28 is force fitted onto the hub, the internal diameter of its part 30 being slightly less than the diameter of the surface 36 of the hub.
- Teeth 38 with trapezoidal section are projecting from the part 32 of the internal surface of the ring 28 and are dimensioned so as to engage with a very small circumferential clearance between the parts 18 of the teeth 14 of the hub 10, for fasten the ring and the hub in rotation.
- the teeth 38 are here longer axially than high transversely.
- the outer surface of the ring 28 comprises teeth 40 of generally trapezoidal section, the small base of which is connected to the outer surface of the ring 28, and which delimit trapezoidal notches therebetween 42 forming housings of helical springs of a torsion pre-damper, as will be described in more detail with reference to FIG. 4.
- the teeth 38 are angularly aligned with the notches 42 to increase the resistance of the ring.
- the outer surface of the ring 28 forms a frustoconical bearing 44. This arrangement makes it possible to simplify the hub 10 since the latter does not have a frustoconical bearing.
- the torsional damper for a friction clutch which is shown in FIG. 4, makes it possible to absorb, at idle and at other speeds of rotation of an internal combustion engine, the vibrations and shocks likely to occur during the transmission of a driving torque between an input element of the shock absorber and its output element, constituted by the hub 10 integral in rotation with a driven shaft 46 (shown in phantom lines) which can be the input shaft d '' a gearbox in the case of a clutch for a motor vehicle.
- a friction clutch disc 48 is fixed, at its internal periphery, by columns not shown with two support and guide washers 50 and 52 which are substantially parallel and which extend radially substantially at the ends of the hub 10.
- a flat annular web 54 which extends in a radial plane with respect to the axis 20 of the hub 10 and whose internal periphery comprises a toothing 56 meshing, with a predetermined circumferential clearance, with the parts of teeth 16 of the hub 10, the teeth, here of trapezoidal shape, of the toothing 56 penetrating with a circumferential clearance in the notches formed between the tooth parts 16 of the hub.
- the internal periphery of the first guide washer 50, on which the disc 48 is applied, is supported by a cylindrical end of a support and guide bearing 58 which includes a part of frustoconical internal surface of support on the frustoconical bearing 44 of the ring 28, and a cylindrical part 60 of larger diameter, surrounding the teeth 40 from the outer surface of the ring 28 at a distance and ending in pins 62 for fixing in rotation on the annular web 54.
- the cylindrical part 60 of the bearing 58 has internal teeth similar to the teeth 40 of the ring 28 and determining between them notches open in the direction of the axis 20 and similar to the notches 42 of the ring 28 which are open in the direction opposite to the axis 20, helical springs 64 with low stiffness being housed in the notches 42 of the ring 28 and in the corresponding notches of the part 60 of the bearing 58. More precisely the cylindrical part 60 has in section a square shape with a annular portion of axial orientation, in which the notches for the springs 64 are formed, and an annular portion of transverse orientation connecting the axial portion to the bearing itself.
- Helical springs 66 of greater stiffness are mounted, on the one hand, in facing openings 68 and 70 of the two washers 50 and 52, radially outside the bearing 58, and on the other hand in orifices 72 in opposite the annular web 54, to constitute a main damper.
- Washers friction 74 and 76 elastically urged by Belleville washers 78 and 80 respectively, are mounted between the second guide washer 52 and the hub 10, on the one hand, and between this second washer 52 and the annular web 54, on the other hand , to dampen the oscillations of springs 64 and 66.
- the washer 76 is linked in rotation to the guide washer 52 by pins (not referenced) engaged in a complementary manner in the holes of the guide washer 52.
- the washer 74 has at its internal periphery a ring comprising bosses engaged in indentations formed at the internal periphery of the guide washer 52 for rotationally connecting the washer 74 with the guide washer 52.
- friction means with axial action are associated respectively with the main damper and with the pre-damper, washers 76, 80 surrounding the washers 74, 78.
- the first guide washer 50 has at its internal periphery an annular flange 82 of axial orientation for contact with the external periphery of the corresponding end of the bearing 58.
- the bearing 58 also acts as a friction member between the first washer 50, the ring 28 attached to the hub 10 and the annular web 54.
- This torsional damper operates in the following manner: at engine idling speed, the annular web 54 is integral in rotation with the guide washers 50 and 52 and the clutch disc 48, due to the great stiffness of the springs 66. The vibrations are absorbed by the springs 64 with circumferential action of low stiffness of the pre-damper and by the friction between, on the one hand, the bearing 58 and the ring 28 mounted on the hub 10 and on the other hand, the hub 10 and the washer 74.
- the hub 10-ring insert assembly 28 makes it possible to combine the advantages of the devices described in the aforementioned prior documents WO 96/14521 and WO 98/36188, without having the drawbacks thereof.
- the ring 28 can be made of moldable plastic, preferably reinforced with fibers. It can also be made of metallic material, preferably moldable, or of sintered material, depending on the desired friction between the conical surface 44 of the ring and the bearing 58.
- the ring 28 meshes with a small circumferential mounting clearance with the teeth 14 of the hub.
- the disc 48 comprises at its outer periphery friction linings for its rotational connection disengageably with a reaction plate integral in rotation with the crankshaft of the engine.
- the disc 48 can be fixed directly on a plate integral in rotation with the motor shaft, or else an extension of the first washer 50 is fixed on such a plate.
- the number of notches 42 of the ring 28 depends on the applications and may be less than or equal to the number of teeth 38. Thanks to the teeth 38, the thickness of material at the bottom of the notches 42 is sufficient and the springs 64 of low stiffness, which are sensitive to centrifugal force, can be installed on a small diameter.
- the springs 64 and 66 can also be replaced, at least in part, by blocks of elastic material.
- the cylindrical part 60 can be metallic and include axial tabs to replace the pins 62.
- This metallic part is in one embodiment covered at its base with a layer or thickness of a material with a low coefficient of friction to form the frustoconical internal surface of support on the frustoconical bearing 44 of the ring 28.
- the aforementioned material is a plastic material, in particular a material thermoplastic. This material is, in one embodiment overmolded on the base of the metallic cylindrical part, advantageously in stamped sheet metal.
- the base of the part 60 is constituted by at least part of the annular portion of transverse orientation of the part 60.
- This transverse portion advantageously includes holes for anchoring the plastic material overmolded on the part 60.
- the transverse portion can therefore be covered, at least on one of its faces, with a plastic material. It is in the annular portion of axial orientation of the part 60 that the recesses for housing the elastic means 64 are formed, preferably by stamping.
- the elastic means 64 can have a large circumferential length. These elastic means can therefore have a curved shape. As a result, the notches do not necessarily have a dovetail shape. These indentations therefore have in one embodiment a bottom of curved shape and are delimited laterally by tabs.
- the elastic means 64 may consist of coil springs or of blocks of elastic material, such as elastomer, hollowed out for creep of the material during the relative rotational movement between the ring 28 and the bearing 58. Several elastic means can be mounted in series in the same notch.
- the elastic means are housed in a cavity delimited by the ring 28, the part 60 and the web 54.
- the ring 28 according to the invention is a piece of adaptation to the shape of the bearing 58 possibly bi-material.
- the hub 10 is simplified and can be standardized.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007007797A KR100602305B1 (ko) | 1998-11-18 | 1999-11-17 | 마찰 클러치 디스크용 비틀림 댐퍼 |
DE19982653T DE19982653B4 (de) | 1998-11-18 | 1999-11-17 | Torsionsdämpfer für eine Reibungskupplungsscheibe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9814518A FR2785957B1 (fr) | 1998-11-18 | 1998-11-18 | Amortisseur de torsion pour disque d'embrayage a friction |
FR98/14518 | 1998-11-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000029761A1 true WO2000029761A1 (fr) | 2000-05-25 |
Family
ID=9532896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002822 WO2000029761A1 (fr) | 1998-11-18 | 1999-11-17 | Amortisseur de torsion pour disque d'embrayage a friction |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR100602305B1 (fr) |
DE (1) | DE19982653B4 (fr) |
FR (1) | FR2785957B1 (fr) |
WO (1) | WO2000029761A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006058403A2 (fr) * | 2004-12-02 | 2006-06-08 | Zf Do Brasil Ltda - Divisão Zf Sachs | Disque d'embrayage et systeme d'embrayage |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110145553A (zh) * | 2018-02-12 | 2019-08-20 | 舍弗勒技术股份两合公司 | 离合器从动盘及离合器 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1251468A (fr) * | 1969-10-18 | 1971-10-27 | ||
DE3616301A1 (de) * | 1985-05-18 | 1986-11-20 | LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl | Torsionsschwingungsdaempfer |
EP0546557A2 (fr) * | 1991-12-10 | 1993-06-16 | FICHTEL & SACHS AG | Disque d'embrayage pour un embrayage à friction de véhicule |
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 |
FR2746472A1 (fr) * | 1996-03-22 | 1997-09-26 | Valeo | Amortisseur de torsion a rondelle entretoise, notamment pour vehicule automobile |
WO1998036188A1 (fr) | 1997-02-14 | 1998-08-20 | Valeo | Moyeu pour preamortisseur notamment pour vehicule automobile et dispositif amortisseur de torsion comportant un tel moyeu |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4446955A (en) * | 1980-07-03 | 1984-05-08 | Borg-Warner Corporation | Clutch driven plate assembly with a floating hub |
DE3448538C2 (de) * | 1984-11-23 | 1996-08-29 | Luk Lamellen & Kupplungsbau | Torsionsschwingungsdämpfer |
EP0732525B1 (fr) * | 1995-03-14 | 2000-02-23 | Valeo | Amortisseur de torsion à préamortisseur |
FR2797010B1 (fr) * | 1999-07-30 | 2001-11-02 | Valeo | Amortisseur de torsion pour embrayage, en particulier pour vehicule automobile |
-
1998
- 1998-11-18 FR FR9814518A patent/FR2785957B1/fr not_active Expired - Lifetime
-
1999
- 1999-11-17 DE DE19982653T patent/DE19982653B4/de not_active Expired - Fee Related
- 1999-11-17 KR KR1020007007797A patent/KR100602305B1/ko active IP Right Grant
- 1999-11-17 WO PCT/FR1999/002822 patent/WO2000029761A1/fr active IP Right Grant
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1251468A (fr) * | 1969-10-18 | 1971-10-27 | ||
DE3616301A1 (de) * | 1985-05-18 | 1986-11-20 | LuK Lamellen und Kupplungsbau GmbH, 7580 Bühl | Torsionsschwingungsdaempfer |
EP0546557A2 (fr) * | 1991-12-10 | 1993-06-16 | FICHTEL & SACHS AG | Disque d'embrayage pour un embrayage à friction de véhicule |
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 |
FR2746472A1 (fr) * | 1996-03-22 | 1997-09-26 | Valeo | Amortisseur de torsion a rondelle entretoise, notamment pour vehicule automobile |
WO1998036188A1 (fr) | 1997-02-14 | 1998-08-20 | Valeo | Moyeu pour preamortisseur notamment pour vehicule automobile et dispositif amortisseur de torsion comportant un tel moyeu |
FR2759750A1 (fr) * | 1997-02-14 | 1998-08-21 | Valeo | Moyeu pour preamortisseur notamment pour vehicule automobile, et dispositif amortisseur de torsion comportant un tel moyeu |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006058403A2 (fr) * | 2004-12-02 | 2006-06-08 | Zf Do Brasil Ltda - Divisão Zf Sachs | Disque d'embrayage et systeme d'embrayage |
WO2006058403A3 (fr) * | 2004-12-02 | 2006-08-03 | Zf Dp Brasil Ltda Divisao Zf S | Disque d'embrayage et systeme d'embrayage |
CN100564934C (zh) * | 2004-12-02 | 2009-12-02 | Zf巴西有限公司 | 离合器盘和离合器系统 |
Also Published As
Publication number | Publication date |
---|---|
DE19982653B4 (de) | 2009-01-29 |
DE19982653T1 (de) | 2001-02-22 |
FR2785957A1 (fr) | 2000-05-19 |
FR2785957B1 (fr) | 2001-01-19 |
KR100602305B1 (ko) | 2006-07-14 |
KR20010034172A (ko) | 2001-04-25 |
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