WO2000020777A1 - Double volant amortisseur, notamment pour vehicule automobile - Google Patents
Double volant amortisseur, notamment pour vehicule automobile Download PDFInfo
- Publication number
- WO2000020777A1 WO2000020777A1 PCT/FR1999/002409 FR9902409W WO0020777A1 WO 2000020777 A1 WO2000020777 A1 WO 2000020777A1 FR 9902409 W FR9902409 W FR 9902409W WO 0020777 A1 WO0020777 A1 WO 0020777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- internal
- ring
- hub
- washer
- reaction plate
- 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
- F16F15/30—Flywheels
- F16F15/31—Flywheels characterised by means for varying the moment of inertia
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
- F16D7/024—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces
- F16D7/025—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs
-
- 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
- F16F15/131—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 the rotating system comprising two or more gyratory masses
- F16F15/133—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 the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
- F16F15/134—Wound springs
- F16F15/13407—Radially mounted springs
-
- 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
- F16F15/131—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 the rotating system comprising two or more gyratory masses
- F16F15/139—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 the rotating system comprising two or more gyratory masses characterised by friction-damping means
- F16F15/1397—Overload protection, i.e. means for limiting torque
Definitions
- the present invention relates to a double damping flywheel for the rotational coupling of an internal combustion engine to a transmission system, in particular intended for a motor vehicle.
- Such a double damping flywheel is described in the document FR-A-2 749 904.
- a torque limiter ' intervenes between a plate, constituting the reaction plate of a friction clutch, and an inner hub surrounded by the reaction plate.
- the reaction plate and the hub belong to a secondary flywheel intended, via a friction face of the reaction plate, to be disengageably connected to a driven member of a transmission system; such as the input shaft of a gearbox of a motor vehicle.
- the double flywheel also comprises a primary flywheel intended to be linked in rotation to a driving shaft, such as the crankshaft of an internal combustion engine of a motor vehicle.
- the secondary flywheel is rotatably mounted, via its hub, on the primary flywheel, having an element of generally transverse orientation, such as a plate, parallel to the reaction plate of the secondary flywheel.
- Elastic members operate between the transverse element of the primary flywheel and the hub of the secondary flywheel to resiliently couple the secondary flywheel to the primary flywheel.
- the elastic members may consist of curved springs, in particular precurved, intervening circumferentially between supports integral with the primary flywheel and arms that a disc secured to the hub of the secondary flywheel has at its external periphery.
- the arms are arranged between two supports facing the primary flywheel.
- the elastic members intervene radially for the rest position of the double damping flywheel.
- the torque limiter has a friction washer provided with legs straightened outwards and passing through orifices formed in a washer with axial elasticity integral with the hub.
- the friction washer forms the side of a groove, the other side and the bottom of which belong to the outer periphery of the hub.
- the reaction plate has at its internal periphery an internal ring centered by the bottom of the throat and pinched between the sides of the throat. This arrangement is satisfactory, since it is of reduced axial size.
- the internal ring thus ensures an elastically calibrated friction connection between the reaction plate and the internal hub thus assembled to the reaction plate.
- a double flywheel of the type indicated above is characterized in that the internal ring is attached to the reaction plate by being of different material.
- the reaction plate - internal ring assembly is thus bi-material, constituting the external part of the secondary flywheel.
- the invention is characterized by the assembly of the internal ring with the reaction plate.
- This secondary flywheel through its external part, forming a reaction plate, has good heat resistance and is rigid enough to withstand the axial and centrifugal forces exerted on it during operation.
- This reaction plate is made of moldable material having adequate friction characteristics. It is advantageously made of cast iron to give it the desired inertia. Alternatively it is based on aluminum, which was not possible in the prior art, and the friction face which it presents, for contact with the friction lining of a friction disc, can consist of a layer fixed by any means on the material of the reaction plate and having the desired coefficient of friction. All this is made possible because the internal ring is made of a material different from the reaction plate and can have the desired thickness and mechanical strength.
- This ring makes it possible to maintain a small axial size at the level of the torque limiter despite the stacking of parts at this location and this with a reduced weight since this ring is advantageously metallic. It is for example made of sheet metal. This sheet metal is in a embodiment tempered to give it the desired hardness. As a variant, the sheet is covered with an anti-wear layer, so the internal ring can have a complex shape required by its function.
- This ring is in an embodiment thinner than the ring of the prior art and wears less than a cast iron ring, so that the life of the double damping flywheel is increased.
- the internal ring is thinner than the reaction plate. The reduction in thickness of the internal ring makes it possible to reduce the axial size of the torque limiter or, for the same size, to increase its performance by providing the torque limiter with several elastic washers with axial action.
- This ring will easily absorb the stresses to which it is subjected.
- This ring can be produced by stamping, possibly with welding of several parts in the metallic quality most suitable for this function.
- the assembly of the ring on the reaction plate can be ensured by any suitable means, for example by overmolding the reaction plate on one internal ring comprising reserves, such as holes, or hooking projections or else by crimping the tabs of the ring on the reaction plate.
- a cage may be formed delimited by the internal ring and a part secured to the internal hub, the internal ring being closer to the primary flywheel and offset axially with respect to the axis of radial symmetry of the reaction plate and in the direction the primary wheel. Inside this cage are housed elastic means with axial action, which is provided with the torque limiter. This is made possible because, as mentioned above, the internal ring can have the desired shape and the desired length.
- This ring can therefore extend lower than the internal ring of the prior art, which makes it possible to reduce the consumption of material of the internal hub.
- the coefficient of friction of the material of the reaction plate can be different from that of the material of the internal ring, which makes it possible to optimize the functions of the internal ring and the reaction plate, knowing that the internal ring can be coated with a layer, or even with a friction lining making it possible to reduce its wear and / or to control its coefficient of friction.
- the part integral with the internal hub serves, in one embodiment of a centering device for the reaction plate, being shaped at its external periphery to come into intimate contact with the internal periphery of the reaction plate.
- this part has at its outer periphery an annular rim of axial orientation coming into intimate contact with the internal periphery of the reaction plate.
- This rim by its internal periphery can be used for driving in rotation a distribution washer with interposition between the distribution washer, for example a Belleville washer or a diaphragm bearing on the part integral with the internal hub in order to use the distribution washer to tighten a friction lining between the distribution washer and the internal ring or an integral part in rotation thereof.
- the internal ring can be of frustoconical shape at its internal periphery to come into contact with a frustoconical bearing complementary to the hub, which makes it possible to increase the performance of the torque limiter.
- the part integral with the internal hub therefore constitutes a counter-stop.
- the internal hub is shaped to delimit a cavity radially below the internal ring secured to the reaction plate.
- Inside the cavity is housed at least one stop integral with the friction washer and offset axially in the direction of the primary flywheel relative to the friction washer.
- elastic means with axial action bear on the stop and on at least one against stop, secured to a support piece secured to the inner hub, for tightening the ring between the sides of the throat.
- the function of the torque limiter is improved, in particular its torque transmission capacity, as well as its lifetime, since it is possible to precisely control the load exerted by the elastic means having axial action due to the fact that these intervene between a stop and a counter-stop, possibly split, belonging to two separate parts.
- the support piece integral with the hub is located radially below the friction washer and therefore has a small size radially.
- the same overall axial dimensions are preserved overall at the limiter.
- the axial space is reduced because no part is superimposed on the friction washer, the elastic means acting below the internal ring.
- the abutment (s) are housed in a cavity which is advantageously open axially in the direction opposite to the primary flywheel.
- the solution is therefore simple and economical, the support piece integral with the hub being secured to it by rivets forming, in one embodiment, articulation journals for the elastic members or fixing rivets for an acting disc. on the elastic organs.
- the friction washer is advantageously inclined at rest and is then straightened, its inclination decreasing after assembly, under the action of elastic means, so that ' the friction washer follows the shape of the ring of the reaction plate well and that the performance of the torque limiter is increased.
- the limiter can therefore transmit more torque.
- the cavity according to the invention promotes the cooling of the internal hub and therefore of the bearing means acting between the hub and a first central hub of the primary flywheel.
- the stop and the counter stop are advantageously of transverse orientation, and are axially offset with respect to one another.
- the elastic means with axial action may consist of a plurality of helical springs.
- the elastic means with axial action comprise a Belleville washer. It may be, for example a diaphragm, that is to say a part comprising at its external periphery a Belleville washer extended radially inwardly by a central part fragmented into lugs by slots separating two two legs.
- the elastic means consist of a Belleville washer.
- the Belleville washer or the diaphragm is in contact at its external periphery with the stop and at its internal periphery with the counter-stop.
- the life of the torque limiter can be increased, since it is less sensitive to wear than that of the prior art.
- this characteristic curve has a generally sinusoidal portion shape so that the initial load exerted by the Belleville washer is chosen beyond the maximum of the curve, that is to say for a deflection greater than that corresponding to this maximum.
- this initial charge is chosen to be close to the maximum of the characteristic curve.
- the bottom of the groove is formed by the hub which is hollowed out radially below the internal ring to form a cavity open axially in the direction opposite to the primary flywheel.
- the stop according to the invention is housed in this cavity.
- the internal hub is therefore of reduced thickness below the internal ring.
- the bottom of the hub groove is produced by means of a bushing, the internal periphery of which serves as a centering device for the friction washer and the external periphery serving as a centering device for
- This friction washer is linked in rotation by cooperation of shapes to the hub.
- the stop is extended at its internal periphery by at least one lug of transverse orientation engaged in a notch made in the hub.
- At least two tabs and two notches are provided, and this, in diametrically opposite position.
- the function and characteristics of the torque limiter are better controlled, and this, overall, in the same size, in practice, in a slightly reduced axial size.
- at least one of the sides of the groove and at least one of the associated faces of the ring can be of frustoconical shape to increase the transmitted torque.
- the torque limiter is better cooled.
- the hub is of reduced thickness below the internal ring thanks to a veil which it presents for this purpose. It is the external periphery of this veil which serves as a centering device for the reaction plate.
- the external periphery of the web is in intimate contact with an annular bearing of axial orientation connecting the external periphery of the internal ring to the lateral face of the reaction plate facing the primary flywheel.
- Shavings are formed by frictional contact of the web with the ring. To evacuate these shavings, notches are provided at the periphery of the veil.
- the friction washer is linked in rotation by cooperation of shapes with the counter-stop by means of its stop.
- the stop comprises for example at least one tab engaged in an associated hole formed in the counter-stop.
- the counter-stop is provided with a stamping, for example in the shape of a U, in which the tab of the stop engages.
- the solution of centering the reaction plate by a web of the hub is advantageous since it makes it possible to reduce the radial size of the f it that the hub is devoid of a centering sleeve.
- the counter-stop can serve as a centering device for the friction washer. To do this, it suffices to provide the abutment of the friction washer with at least two aforementioned tabs engaged in two holes or two associated stampings formed in the counter-abutment.
- the veil can be distinct from the hub by being secured thereto for example by overmolding or crimping. It is the same for the internal ring according to the invention. This makes it possible to reduce the thickness of the web and of the internal ring and therefore to reduce the axial size.
- the web and the inner ring can be assembled with the hub and the reaction plate respectively by any means.
- the internal ring is for example metallic. It is the same with the veil. These can be coated with an anti-wear layer " for example based on nickel or molybdenum. These parts can be economically made of sheet metal hardened by a quenching operation. All of this makes it possible to increase the life of the double flywheel because the internal ring wears less than the internal ring molded with the reaction plate, for example in cast iron.
- FIG. 1 is an axial sectional view of a double damping flywheel according to the invention
- Figure 2 is an enlarged view of the limiter of the lower part of Figure 1
- - Figure 3 is a detail view illustrating, in partial section, an elastic member of the double damping flywheel
- Figure 4 is a view along arrow 4 of the figure
- Figure 5 is a partial view in axial section of the double damping flywheel for a second embodiment
- Figure 6 is a partial view similar to Figure
- Figures 7 and 8 are partial views in axial section of a double damping flywheel respectively by a fourth and a fifth embodiment;
- Figure 9 is a view similar to Figure 2 for a sixth embodiment.
- the double damping flywheel 11 intervenes between the crankshaft of the internal combustion engine of a motor vehicle and the input member of a transmission system, namely the input shaft of the gearbox.
- This double damping flywheel here of torsion, for coupling an internal combustion engine to a transmission system, comprises (FIGS. 1 to 4) a primary flywheel 12 and ' a secondary flywheel 13 coaxial mounted movable in rotation l' one with respect to the other around a common axis of axial symmetry XX to one against a friction device 46 with axial action and elastic damping devices 15, of generally radial orientation, distributed regularly circumferentially as described in document FR-A-9 712 115 published under the number FR-A-2 769 062, to which reference will be made for more details.
- each damping device 15 contains at least one helical spring 24 inside a housing 26 belonging to a first sub-assembly 27 provided at its external periphery with a first part d hinge 29 with a cylindrical hole 42 which defines a hinge axis YY.
- the part 29 is attached by welding to the casing 26 of tubular shape.
- the elastic damping device 15 also comprises a second sub-assembly 30 here comprising two concentric helical springs 24, 25 of different stiffness mounted on a rod 32 provided with a second articulation part 34 provided with a cylindrical bore which defines an axis of articulation ZZ.
- the springs 24, 25 bear on a piston 37 belonging to a first stop 36 located at the upper end of the rod 32 placed inside the housing 26.
- a guide ring 41 is molded onto the external periphery of the piston 37 which is secured, here by welding, to the metal rod 32.
- the spring 24 surrounds the spring 25 and the rod 32 and is supported on a second stop 38 fixed to the end 39 of the housing 26 opposite that which carries the first part. 29.
- the second stop 38 is plastically deformable and comprises a bottom 51 secured, here by welding, to the lower end of the housing 26.
- the rod 32 passes through the bottom 51.
- a plastically deformable means is disposed between the bottom 51 and the spring 24. This means comprises a cup 61 with a skirt surrounding the rod 32 at a radial distance and provided with a transverse annular rim 62 on which the end of the spring 25 of lower stiffness bears.
- a guide ring 64 is placed in the volume defined by the rod 32, the bottom 51 and the cup 61.
- the cup 61 has an annular washer having in section a concave shape for support of the spring 24. It is this part which is plastically deformable.
- the other embodiments of document FR-97 12115, published under the number FR-A-2 769 062 are applicable to the present invention.
- a pin 45 is riveted to the internal periphery of the secondary flywheel 13.
- This pin 45 is installed on an internal hub 18 belonging to the secondary flywheel 13, also called second mass.
- An unreferenced bearing is interposed radially between the external periphery of the journal 45 and the cylindrical bore of the second articulation part 34.
- a journal 44 is installed at the external periphery of a transverse element 14 belonging to the primary flywheel 12, also called first mass.
- An unreferenced bearing is located between the outer periphery of the pin 44 and the hole 42 of the first articulation head 29.
- each damping device 15 is thus mounted articulated between the primary flywheel 12 and the secondary flywheel 13 between the two axes YY and ZZ. Any relative circumferential movement between the two flywheels 12, 13 results in an elongation of each elastic damping device resulting in compression of the springs 24, 25 of radial orientation for the rest position of the double damping flywheel.
- the secondary flywheel 13 comprises a plate 16 forming the reaction plate of a friction clutch provided with a friction disk intended to be secured in rotation to the member of transmission system input, i.e. here at the gearbox input shaft.
- the friction disc has at least one friction lining at its outer periphery.
- the friction clutch comprises a cover fixed by 'means of screws, one of which is visible at 120 in Figure 1, the reaction plate 16, provided for this purpose threads at its outer periphery.
- This plate 16 dorsally has a friction face 17.
- the plate 16 also carries pins 121 for centering the cover.
- a diaphragm is supported on the bottom of the cover, of hollow form, for action on a pressure plate linked in rotation to the cover, and clamping of the friction lining (s) between the pressure and reaction plates.
- the clutch is engaged and the torque of the internal combustion engine is transmitted here to the input shaft of the gearbox via the friction lining (s) of the friction disc.
- the diaphragm fingers By acting on the internal ends of the diaphragm fingers, here by pushing, using a clutch release device of the manual, automatic or semi-automatic type, the diaphragm is pivoted to disengage the clutch and interrupt the transmission of couple.
- the reaction plate is linked in rotation by its friction face 17 in a disengageable manner, via the friction disc, to the input member of the transmission.
- the friction clutch can be provided with a device for taking up the wear of the friction linings of the friction disc.
- the elastic members acting between the secondary flywheel can have a circumferential action and act between two guide washers secured to the primary flywheel and a central web or disc secured to the hub of the secondary flywheel 13; the elastic members being mounted, for example, in a sealed chamber carried mainly by the primary flywheel 12 and this, at the outer periphery thereof.
- the transverse element 14 of the primary flywheel 12 may include a metal support flange as in Figures 3 to 6 of this document FR-98 09638.
- the primary flywheel 12 ′ can be fixed to the output driving shaft of the internal combustion engine by means of a second hub forming a spacer between this output shaft - here the crankshaft of said engine - and a first hub 6 that includes the primary flywheel 12.
- the transverse element 14 consists of a plate of moldable material just like the reaction plate 16, forming an inertia disc.
- the plates 14 and 16 are here made of cast iron.
- the transverse element 14 (the flange or the plate) is parallel to the reaction plate 16 dorsally having a friction face 17 for a friction lining of the friction disc.
- the elastic damping devices 15 intervene radially (FIGS. 1 to 8) or circumferentially (FIG. 9) between the transverse element 14 and the hub 18, which the secondary flywheel 13 presents centrally.
- the elastic members 24, 25 are located in the space delimited by parts 14, 16 and 18.
- the axial offset of the reaction plate being produced by means of the first hub 6, which the primary flywheel 12 presents centrally.
- the secondary flywheel 13 is mounted by its hub 18 in rotation on the first hub 6 of the primary flywheel 12 by means of small bearing means 8 of the smooth or ball bearing type.
- the first hub 6 can carry, internally, a pilot bearing 7 to support the free end of the driven member, here the free end of the input shaft of the gearbox.
- the bearing means 8 consist of a ball bearing intervening between the outer periphery of the first hub 6 and the inner periphery of the hub 18 of the secondary flywheel.
- the outer ring of the ball bearing can be formed by means of the hub 6 of the secondary flywheel, as described in document FR-A-2,749,904.
- the ball bearing is fixed by condenser discharge welding to the first hub 6 and the hub 18.
- the bearing 8 intervenes axially between the first hub 6 and the hub 18 of the secondary flywheel, as described in document FR-A-2 754 034.
- the bearing means 8 are carried by the first hub 6 and operate axially and / or radially between the first hub 6 and the hub 18 for rotary mounting of the secondary flywheel 13 on the primary flywheel 12.
- the hub 18 is an internal hub, since it is surrounded by the reaction plate 16 with, the intervention of a torque limiter 19 between the plate 16 and the hub 18. This limiter 19 intervenes between the internal periphery of the reaction plate 16 and the outer periphery of the hub 18, here in treated steel.
- the reaction plate 16 is rotatably mounted on the internal hub 18 as described below.
- This hub 18 is provided with through holes 20 for the passage of at least one tool for access to the heads of the fastening members 21 of the primary flywheel, here in the crankshaft of the engine of the motor vehicle, as a variant, in the secondary hub secured to the crankshaft .
- the fastening members 21 here consist of screws, the heads of which have imprints with which the tool (s) for screwing engage.
- the screws 21 pass through holes 22 made in the plate 14 in axial coincidence with the through holes 20.
- the through holes 20 are located radially above the bearing means 8 - here a bearing 8 with a single row of balls -, and this, at the inner periphery of the hub 18.
- the holes 20 have a diameter greater than that of the screw heads 21, which are thus ultimately mounted by the manufacturer of the motor vehicle.
- the screw heads have a diameter greater than that of the through holes 20, so that the screws 21 are trapped and delivered to the car manufacturer.
- the primary flywheel 12 carries at its outer periphery the starter ring 23 of the motor vehicle.
- the plate 14 is thicker at its outer periphery and the starter ring 23 is mounted, in known manner, by hooping on a ' cylindrical bearing of axial orientation 123 and shouldered, that has at its outer periphery the plate 14.
- the plate 14 also carries at its external periphery a plate 124 in the form of a washer carrying the pins 44 force fitted into the plate 14.
- the washer 124 is fixed by rivets 125 to the plate 14. II is thus formed at the outer periphery of the plate 14, in moldable material, yokes for carrying the pins 44; the first articulation parts 29 being inserted axially between the plate 14 and the washer 124; while being mounted on the pins 44.
- the plate 14 has extra thicknesses 129 to increase the inertia of the primary flywheel 12.
- the extra thicknesses 129 have a generally triangular shape so as not to interfere with the housings 26 of the elastic devices damping 15 interposed circumferentially, alternatively, between the thicknesses 129.
- the first hub 6 is in one piece with the plate 14. This hub 6 is molded with the plate 14.
- the first hub 6 is attached, for example by riveting or welding, to the plate 14 or, in general, to the flange 14, generally of transverse orientation as visible in FIG. 9.
- the friction means 46 are of the type described in document FR-A-2 754 034 to which reference will be made for more details. These means 46 operate radially above the through holes 20 and the pins 45.
- these friction means 46 comprise a control washer 146 made of plastic material allowed to rub against the dorsal face 114 of the plate 14 facing the secondary flywheel 13.
- the washer 146 is linked in rotation to the secondary flywheel by means of axial projections in the form of cylindrical pins 147 extending the pins 45.
- the pins 147 each penetrate into a notch (not referenced) that the washer 146 has at its periphery internal.
- the washer 146 has an external toothing formed by an alternation of teeth and notches.
- a friction washer 148 surrounds the control washer 146 and has at its internal periphery an internal toothing formed by alternating teeth and notches. The teeth of the internal teeth penetrate circumferentially into the notches of the external teeth and vice versa. The friction washer 148 therefore meshes, at circumferential clearance with the control washer 146.
- the washer 148 is allowed to rub against the dorsal face 114 of the plate 14 or as a variant on a part or a covering integral with the face 114.
- a closing washer 151 is fixed by rivets 152 to the plate 14.
- the rivets 152 are implanted radially above the washer 148.
- the control washer 146 is pinched between the face 114 and the internal periphery of the washer 151 of frustoconical shape radially below its zone of attachment to the plate 14.
- the washer 151 is provided with windows visible in FIG. 17 of the document FR -A-2 754 034 so that the washer 151 is elastically deformable.
- An application washer 149 meshes with the plate 14 by a cooperation of shapes, legs (not referenced) of the washer 149 penetrating in axial grooves (not referenced) made in an extra thickness of the plate 14 and this, below rivets 152.
- An elastic washer with axial action 150 here a Belleville washer, is supported on the closing washer 151 for action on the application washer 149, axially movable relative to the plate 14, and tightening of the friction washer 148 between face 114 and application washer 151.
- the control washer is pinched elastically between the face 114 and the internal periphery of the closing washer 151. During a relative angular movement between the two flywheels 12, 13, the control washer 146 is rotated by the pins 147 and rubs permanently between the face 114 and the washer 151. The friction washer 148 intervenes delayed manner after adjusting the play between the external and internal teeth.
- the washer 148 adds these effects, its friction between the face 114 and the application washer 151, integral in ' rotation with the plate 14, being controlled by the Belleville washer 150, here stiffer than the washer 151.
- the torque limiter 19 located opposite the friction means 46; radially, on the one hand, above the passages 20 and, on the other hand, below the rivets 152 and the friction face 17.
- the torque limiter has a friction washer 280, the mean radius of which is advantageously generally equal to that of the friction washer 148, which is favorable for the reduction of the axial dimensions.
- the reaction plate 16 forming an inertia disc, carries at its internal periphery radially below the face 17, an internal ring 160 of reduced thickness and transverse orientation.
- This internal ring 160 thinner than the plate 16, is rotatably mounted in an annular groove 10, delimited laterally, by a veil 180 and the friction washer 280.
- the veil 180 and the washer 280 are of transverse orientation and are therefore perpendicular to the axis XX constituting the axis of rotation and axial symmetry of the double torsion damping flywheel.
- the groove 10 is carried by the hub 18 and extends to the outer periphery thereof.
- the internal ring 160 is attached to the reaction plate 16 by being of a different material from that of the reaction plate 16 as described below. Thanks to this arrangement, the reaction plate can be based on aluminum, which was not previously possible, since aluminum is not suitable for the torque limiter.
- the torque limiter 19 also includes a washer 72, at least one counter-stop 71, elastic means with axial action 70, and at least one stop 271, integral with the friction washer 280, linked in rotation with the internal hub 18, mounted for rotation on the first hub 8 by means of the bearing means 8.
- the abutment 71 extends radially outwards relative to the washer 72 of which it is integral.
- the stop 271 extends toward 'the inside relative to the friction ring 280.
- the ring 160 has a cylindrical internal bore 163 centered by the outer periphery 183 of an annular sleeve axially oriented means 182 belonging to the internal 18 and forming the cylindrical bottom of the groove 10, of annular shape.
- the reaction plate 16 is therefore rotatably mounted on the sleeve 182 while being centered by the sleeve 182 of the hub 18 surrounded by the reaction plate 16.
- the web 180 and the friction washer 280 each have an internal face respectively 181 and 281 of transverse orientation.
- the lateral internal faces 181, 281 are opposite one another and form the lateral internal flanks 181, 281 of the annular groove 10.
- the ring 160 has lateral external flanks 161, 162 formed by the lateral faces of the ring 160.
- the lateral lateral flanks 161, 162 are allowed to wear and rub on the internal flanks 181, 182 under the action of elastic means with axial actions 70 bearing, on the one hand on the counter-stop 71, and, on the other hand, on the stop 271.
- at least one of the lateral flanks 181, 281 of the groove 10 is of frustoconical shape.
- the external lateral flank 162, 161 complementary to the ring 160 is of frustoconical shape.
- the associated sides 161, 281 are in a frustoconical embodiment.
- the internal hub 18 is shaped to delimit a cavity 9 radially below the internal ring 160 of the reaction plate 16.
- the hub 18 is of reduced thickness below the internal ring 160 and the cavity 9 is axially open in the direction opposite to the primary flywheel. In these figures the cavity 9 is therefore blind and the bottom of the cavity 9 is delimited by the inner hub 18, here by the web 180 of the hub 18.
- This web 180 is integral with the hub 18 or is attached to the latter as described below so that the hub 18 can be a bi-material hub.
- the stop 271 is housed in a cavity 9, produced in the internal hub 18 at the external periphery thereof.
- the cavity 9 is shaped recess, in Figures 1 to 4.
- the recess is formed in the hub 18 of reduced thickness at this place.
- the recess 9 is delimited radially externally by the bush 182 of axis XX and laterally, that is to say transversely, by the web 180 extending transversely on either side of the bush 182 and forming the transverse bottom of the cavity 9.
- the recess 9 is delimited by the main part 184 of the internal hub 18, thicker than the web 180 projecting radially outwards relative to the main part 184, in which are made the passage holes 20.
- the web 180 is therefore a protuberance of the hub 18.
- the web 180 carries the bushing 182 in elevation, the internal periphery of which here serves as a centering device at the external periphery of an annular portion of axial orientation 173 connecting the friction washer 280 to the stop 271 housed at the inside of the recess 9, forming a cavity open axially in the direction opposite to the transverse element 14.
- the cavity 9 can be obtained by molding, as a variant, by machining.
- the sleeve 182 by its external periphery serves as a centering device for the internal ring 160.
- the stop 271 here extends radially above the counter-stop 71 extending generally in the same transverse plane as the friction washer 280.
- the counter-stop 71 is axially offset relative to the stop 271 and this, in the opposite direction to the primary flywheel 12.
- the stop 271 is generally located in the thickness of the internal hub 18 by means of the recess 9.
- the counter stop 71 extends in axial projection outside the internal hub 18, on the side of the dorsal face thereof, facing away from the primary flywheel 12 and elastic damping devices 15.
- the stop 271 is extended radially inwards by at least one transverse connection tab 272 engaged in a radial notch 185 which has at its external periphery the main part 184 of the internal hub 18.
- two tabs 272 and two notches 185 are provided.
- the notches 185 and the tabs 272 are diametrically opposite.
- a connection by cooperation of shapes therefore exists between the tabs 272 and the hub 18 so that the friction washer 280 is integral in rotation with the hub 18 while being able to move axially with respect thereto following in particular the phenomena of wear .
- the number of tabs 272 and notches 185 depends on the applications.
- the notches 185 have a rounded internal radial end ( Figure 4) to avoid jamming of the tabs 272 and have an oblong shape.
- the tabs 272 have a shape complementary to that of the notches 185 and penetrate assembly clearance therein.
- the tabs 272 and the notches 185 have another shape.
- the tabs 272 are offset radially and also axially with respect to the stop 271 and this in the direction of the primary flywheel 12. Thanks to this arrangement, the tabs 272 are interposed axially between the washer 72 and the transverse bottom 186 of the notches 185.
- the notches 185 extend radially inwards the recess 9 and are open axially towards the outside, that is to say in the direction opposite to the primary flywheel 12.
- the recess 9 the transverse bottom of which is constituted by the veil 180, which reduces the axial size.
- an axial clearance exists between the bottom 186 generally of transverse orientation of the notches 185 and the tabs 272 for driving in rotation.
- An axial clearance therefore also exists between the stop 271 and the web 180.
- the tabs 272 are in one piece with the stop 271, itself in one piece with the friction washer 280.
- the parts 272, 271, 173 and 280 belong to one and the same part, here in pressed sheet metal, in order to reduce the
- the elastic means with axial action 70 are, according to a characteristic, located below the internal ring 160 secured to the reaction plate and here consist of a Belleville washer for reducing the number of parts and good control of the load exerted by the washer 70 on the friction washer 280.
- the Belleville washer 70 is replaced by a diaphragm.
- the axial size of the washer 70 is minimum.
- the elastic means with axial action can constitute a corrugated elastic washer of the "Onduflex" washer type.
- the counter-stop 71 and the stop 271 are generally installed on the same circumference being an annular shape.
- the counter-stop 71 is also in one piece with its support washer 72 and is connected to the external periphery of the washer 72 by a connection zone 73 of section in the shape of an "S".
- the washer 72 is here in stamped sheet metal and has at its internal periphery notches 74 axially aligned with the passage holes 20 for passage of the heads of the screws 21 and of the screwing tool (s).
- the washer 72 also includes holes 174 alternating circumferentially with the notches 74 and implanted radially on an average circumference greater than that of the holes 20 and notches 74.
- the notches 185 are implanted radially above two holes 20 diametrically opposite and this circumferentially between two holes 174 in axial coincidence each with a hole 274 made in the inner hub 18.
- the inner hub 18 thus has the maximum mechanical strength as best seen in Figure 4; the notches 185 being generally installed on an average circumference greater than that of the holes 174, 274.
- the Belleville washer 70 is supported at its outer periphery on the stop 271 and at its inner periphery on the counter-stop 71, to urge the washer friction 280 in the direction of the web 180.
- the washer 70 is mounted before fixing, here by riveting, of the washer 72 on the hub 18 by means of the pins 45 as described below.
- the washer 280 can be originally inclined in the direction of the web 180, then be straightened under the action of the elastic washer 70, to perfectly match the external face 161 of the ring 160 of which the other external face 162 bears perfectly on the internal face 181 machined from the web 180.
- the performance and the lifetime of the torque limiter 19 are improved by obtaining maximum contact between the external transverse faces 161, 162 of the machined ring and the internal sides 281, 181 of the groove 10, the ring 160 being clamped axially between the sides 181, 281 of the groove 10 open radially towards the outside, in direction opposite to axis XX.
- the axial dimensions are not increased, on the contrary, this dimensions are slightly reduced.
- at least one of the flanks 181, 281 and at least one of the external flanks 162, 161 can be of frustoconical shape without increasing the axial size compared to the prior art.
- the elastic means 70 are more distant from the friction face 17 and therefore less hot, since they are located radially below the ring 160 and partially penetrate into the cavity 9.
- the washer 280 and the counter-stop 71 are generally in the same plane as the friction face 17, the internal hub 18 being slightly offset axially in the direction of the transverse element 14 relative to the friction face 17.
- the torque limiter 19 is similar to the friction means 46, this limiter comprising a first friction washer 280, radially surrounding a second washer constituted by the counter-stop 71.
- the washers 71, 280 are broadly in the same plane. These washers 71, 280 are connected by the elastic means with axial action 70.
- the pins 45 drive in rotation at one of their ends, the friction means 46 and at their other end, the counter-stop 71, the average diameter of the friction washer 148 being generally equal to that of the friction washer 280.
- a good distribution of forces is thus obtained within the double damping flywheel, as well as a minimum axial size, the housings 26 extending radially above the main part 184 of the internal hub 16, as well as the active surface. of the control washer 146.
- the trunnions 45 are also used for fixing by riveting the washer 72 and therefore of the counter-stop 71 of the hub 18.
- the trunnions 45 have a flange 145, which is allowed to come into contact with the transverse face to the internal hub 18 facing the friction means 46 and the plate 14.
- the flange 145 is extended by a body passing through the aligned holes 274, 174.
- the body has at its end free, beyond the support washer, a head. This head is crushed in contact with the washer 72 for fixing by riveting the washer 72 to the hub 18 using the pins 45.
- the washer 72 is thus secured to the internal hub 18.
- the washer 72 is secured to the hub 18 by means of fixing distinct from the pins 45.
- the face of the web 180 facing the plate 14 is generally in the same plane as the transverse face of the plate 16 facing the plate 14.
- the torque limiter 19 is generally located in the thickness of the plate 16 thanks to the cavity 9 produced in the internal hub 18, which promotes the cooling of the part 184 of the hub 185 and of the bearing 8.
- the crushed heads of the pins 45 are also generally implanted in the thickness of the reaction plate
- the groove 10 is for the most part delimited by the internal hub 18 and comprises a lateral flank formed by the friction washer 280 distinct from the web 180 and therefore from the hub 18.
- This washer 280 can move axially relative to the web 180, while being linked in rotation to the hub 18 by means of the tabs internal 272 and the notches 185.
- the friction washer 280 surrounds the counter-stop 71, while the elastic means 70 are located radially between the friction washer 280 and the support washer 72.
- the axial position of the ring 160 depends therefore of the thickness of the web 180. It will be appreciated that the elastic devices 15 can here have a very great radial length and that, according to the invention, the hub 18 is hollowed out to accommodate the stop 271.
- each sector of the friction washer 280 comprises at least one tab 272.
- the counter-stop 71 and the stop 271 are attached, for example, to fixing respectively on the washer 72 and the washer 280, by example by welding.
- the torque limiter 19 allows the internal hub 18 to be assembled with the reaction plate 16 via the lateral faces of the ring 160 in FIGS. 1 to 4 and 7 to 9 or only one side of the ring 160 'in Figures 5 and 6 described below. This limiter is used to start and stop the internal combustion engine of the motor vehicle to protect the parts of the double damping flywheel. A relative movement of rotation of the reaction plate 16 with respect to the internal hub 18 with sliding of the internal ring is made possible under these conditions under which the frequency of resonance is passed.
- the output shaft of the engine is shown at 100 and at 101 the input shaft of the gearbox, knowing that the hub of the friction disc enters the first hub 6.
- the springs 24, 25 can be replaced by tension springs with tie rods mounted at articulation on the pins 44, 45.
- they may be helical springs with end loops mounted on the pins 44, 45.
- the elastic members 24, 25 act in all cases between the transverse element 14 and the internal hub 18 rotatably mounted on the primary flywheel.
- the friction means 46 can also act at the level of the bearing 8.
- the ring 160 is attached to fixing, for example, by overmolding or crimping on the reaction plate 16.
- the ring 160 is, for example, partially embedded in the plate 16 and therefore has an external extension penetrating into the plate. This extension is advantageously provided with holes and / or projection to perfect the anchoring. During overmolding, the material of the plate 16 penetrates into the holes and / or coats the projections.
- This ring 160 integral in all cases with the plate 16, belongs to the torque limiter 19, acting between the internal periphery of the reaction plate 16 and the external periphery of the internal hub 18, and extends radially below the face of friction 17, intended to be linked in rotation disengageably to the input member 101 of the transmission.
- FIGs 1 and 2 there is shown such a ring reported by overmolding. It is the same in Figures 5 and 7 to 9.
- the holes are shown produced in the ring respectively 160, 160 ′ allowing the inclusion of cast iron during the molding on it of the external part of the reaction plate - internal ring assembly.
- These holes can be replaced and / or supplemented by projections cut out from the internal ring to make or perfect the attachment of the internal ring to the reaction plate.
- the holes can be formed in protrusions, for example of convex shape. The number of projections and / or holes depends on the application. Likewise, the depth of penetration of the internal ring into the reaction plate depends on the applications. This ring strengthens the reaction plate.
- the ring extends over the entire height of the reaction plate to extend radially projecting therefrom and present at its outer periphery an annular rim of axial orientation, directed axially in the opposite direction to the primary flywheel 12 to allow the clutch cover to be fixed as described in document FR-A-2 718 806 filed on 10/20/1995.
- Such an embodiment is visible in Figure 9, in which we see in 160a such a flange for fixing the clutch cover.
- the protrusions can consist of inclined tongues cut out from the internal ring as visible at t '' in Figure 9.
- the internal ring extends radially inwards, that is to say in the direction of the axis XX of FIGS. 1 and 5.
- the ring extends inwards the reaction plate 16 Its material has a coefficient of friction different from that of the reaction plate.
- the internal ring is metallic, advantageously made of sheet metal as described above.
- the ring forms the central part of the internal ring - reaction plate assembly.
- the veil 180 can be attached to a fixing, for example by welding, overmolding, crimping, on the main part 184 of the internal hub 18, in particular to facilitate the production of the cavity 9.
- the added ring 160 or the attached veil 180 can therefore be made of a material different from that of the plate 16 and hub 180 so that these can be bi-material.
- the fact of attaching the ring 160 or the web 180 makes it possible to reduce the thickness of these and therefore to reduce the axial size of the limiter.
- the ring 160 can therefore be made of steel or another material which wears less than cast iron. This material can also have a better coefficient of friction. Thanks to this arrangement, applicable to any torque limiter, wear, in particular of the ring, is reduced, the hub and the ring wearing in the same way.
- the ring 160 or the veil 180 is therefore in a metallic embodiment.
- the ring 160 or the veil 180 is in one embodiment in stamped sheet metal covered with an anti-wear layer. It is for example locally quenched or coated with a layer of nickel or molybdenum.
- the washer 72 is a support piece for the counter-stop 71. It is possible to form ventilation fins in this washer 72 by cutting and folding.
- the veil 180 can be perforated at the level of the cavity 9 to improve ventilation and better cool the torque limiter 19 as well as the bearing means 8.
- the hole in the veil 180 therefore opens into the hollow of the hub 18.
- the stops 271 and counter-stop 71 are of transverse orientation and parallel to one another.
- the stops 271 and counter-stop 71 can be inclined, in particular when the sides 161, 281 are inclined. It is evident from the description and the drawings that the elastic means 70, the stop 271 and the counter-stop 71 are located radially below the groove 10 and therefore of the reaction plate 16.
- the pins 147 constitute protrusions of fastening members 45 of the support piece or pieces 72 of the counter-stop (s) 271.
- the reaction plate 16 is of constant thickness, its ring 160 being of reduced thickness.
- the thickness of the plate may not be constant.
- holes can be provided, for example in the connection zone 73 of the washer 72. These holes belong to ventilation means installed at the level of the limiter.
- the internal radial edge of the cavity 9 can serve as a centering device for the friction washer 280 then extended radially inwards from its abutment (s) 271. This is suitable when the friction washer has a frustoconical shape. It will be noted that the connection zone can be stamped to form a deflector preventing oil leaks, escaping from the axis X-X, from contaminating the friction face 17.
- the bottom of the groove may not be constituted by the internal hub but by the friction washer 280 as visible in Figures 7 and 8, which eliminates the socket 182 of Figure 2 and therefore reduce the radial size.
- the size of the Belleville 70 washer can be increased.
- the internal diameter of the ring 160 and that of the friction face 17 of the reaction plate 16 can be reduced.
- the reaction plate 16 is centered by the external periphery of the web 180 of the internal hub 18, of simplified form since it does not have a socket.
- the reaction plate 16 has an annular bearing of axial orientation 164 connecting the lateral face 163, facing the primary flywheel 12, of the plate 16 to the external periphery of the face 161 of the ring 160 It is this face 161 which is intended to cooperate with friction with the face 181 of the veil 180.
- the bearing surface 164 therefore comes into intimate contact with the external periphery of the veil 180 and is therefore formed thanks to the change in thickness of the plate 16 at its internal periphery for formation of the ring 160. There then arises a problem of evacuation of the chips formed by the contact between the faces 161, 181 because, unlike what happens in Figures 1 to 4, the scope 164 prevents the evacuation thereof.
- the veil 180 is provided with notches 269 opening out at the outer periphery of the veil 180.
- the notches 269 for example have the shape of a half moon.
- the hub 18 is of reduced thickness radially below the ring 160 and delimits by its web 180 a cavity 9 below the ring 160 for housing the stop 271 belonging to the friction washer 280.
- This stop 271 is connected by an inclined portion 273 to the friction washer 280.
- the portion 273 forms the bottom of the groove delimited by the web 180 and the washer 280.
- the bottom 273 therefore does not serve as a centering device for the ring 160.
- the stop 271 in one piece with the friction washer 280, is linked in rotation to the washer 72 in one piece with the counter-stop 71.
- the stop 271 is extended radially inwards by at least one tab 272 passing through an associated hole 285 produced in the connection zone 73 of the washer 72 to the counter-stop 71, said zone 73 being generally of axial orientation and directed in the opposite direction to the primary flywheel.
- Preferences at least two tabs 272 and two associated holes 285 are provided and this in a diametrically opposite manner, the tabs 272 engaging in axial play in the holes 285.
- the friction washer 280 can comprise at least one tab 272 engaged in a notch 185 of the hub 16 as in FIGS. 1 to 4, while the centering of the reaction plate 16 is carried out at using the veil 180 as in FIG. 5.
- the holes 285 of FIG. 7 are replaced by hollow stampings 385, for example in the shape of a U, produced in connection zone 73, the tabs 272 penetrating into the stampings for connection in rotation of the washer 280 to the hub 18 with axial mobility.
- the hub is of reduced thickness at its external periphery for delimitation of the cavity 9. It is the web 180 which delimits with the ring 160 this cavity 9 open axially in the direction opposite to the primary flywheel 12.
- the veil 180 forms the bottom of the cavity 9 delimited in all the figures by the counter-stop 71 of low height for opening the cavity 9.
- the counter-stop 71 and the connection zone 73 can be in one piece with the hub 18 by being molded therewith.
- the reaction plate 16 is centered by the web 180 as in FIGS. 5 to 7.
- the elastic means with axial action then advantageously consist of an open corrugated washer for mounting in the cavity 9.
- a washer a washer of that described in document FR-A-2 747 441.
- the stop 271 is mounted at an angle in the cavity 9, a single tab 272 being provided.
- the small thickness of the limiter makes it possible to reduce the thickness of the double damping flywheel.
- the thickness of the internal ring can be controlled. We can therefore reduce the thickness of the internal ring or give it a more complex shape as visible at 160 'in Figure 5, the ring 160' being thinner than that of Figures 1 and 2.
- the ring 160 ′ extends radially more inwards, that is to say in the direction of axis XX, so that the web 180 ′ of the internal hub 18 ′ is of reduced height so that the hub 18 ′ is more economical since it uses less material.
- the ring 160 ′ has at its internal periphery an annular folded edge b and of axial orientation in intimate contact with the external periphery of the hub 18 ′ thus serving as a centering device.
- the elastic means with axial action 70 'bear on the counter-stop 71' consist of a ring of elastic material 70 ′, here of elastomer fixed on the counter-stop 71 ′ for example by gluing, or adhesion for example by vulcanization in situ.
- This ring 70 ' is mounted with prestress between the ring 160' and the counter-stop 71 'in one piece with the washer 72' riveted on the pins 45.
- the ring 70 ' urges the internal ring 160' in contact with face 181 'of veil 180.
- the elastic ring 70 ′ is coated, at its free end adjacent to the ring 160 ′, with a layer so as to be able to rub directly on the ring.
- a plate is attached to the free end of the elastic ring 70 ′ to rub on the internal ring 160 ′ of complex shape like the washer 72 ′, which is radially higher than in FIGS. 1 to 4.
- the ring 160 ′ and the washer 72 ′ are obtained by stamping so as to form, on the one hand, a shoulder on the counter-stop 71 ′ to retain the elastic ring 70 ′ radially partially towards the outside and, on the other hand hand, form a section offset axially in the direction of the secondary flywheel on the ring 160 'for support of the ring 70'.
- the ring 160 ' is offset axially in the direction of the primary flywheel 12' so that only one of these faces is active, namely that intended to come into contact with the web 180 '. It is thus defined a cage between the washer 72 'and the ring 160' and therefore a cavity 9 '.
- the ring 160 ' is mounted in the groove 10' delimited by the web 180 'and the washer 72'.
- tongues U are formed in the ring 160 ′ as well as in a non-visible manner in the washer 72 ′.
- the faces 181 ′ and 161 ′ of the web 180 ′ and of the ring 160 ′ are of frustoconical shape and the reaction plate 16 ′ is centered directly by the washer 72 ′ having at outer periphery an annular rim 19 '' of axial orientation directed towards the ring 160 '.
- the external periphery of the rim 19 '' is in intimate contact with the internal periphery of the reaction plate and this over an area greater than that of FIGS. 7 and 8 intervening between the web and the reaction plate.
- the limiter includes a Belleville washer 70 'bearing on the washer 72', more precisely on the counter-stop 71 'thereof, and on the friction washer 280''to urge the latter in frictional contact with a disk 160 '''.
- the washer 280 '' is provided at its outer periphery with tabs (not referenced) each penetrating into a groove formed by stamping in the flange 19 '' at the internal periphery thereof. Intermeshing means P intervene between the flange 19 '' and the friction washer 280 '' on which is fixed a friction lining g for friction contact with the disc 160 '''.
- the washer 280 '' is therefore linked in rotation to the washer 72 '.
- the disc 160 ''' has axial tabs P at its outer periphery each penetrating a hole (not referenced) made in the inner ring for rotationally connecting the disc 160''' with the ring 160 '.
- the lining g is fixed to the disk 160 '' '.
- the friction washer 280 '' 'therefore in all cases constitutes a distribution washer for support of the internal periphery of the Belleville washer 70', bearing at its external periphery on the counter-stop 71 'stiffened by the flange 19' ''
- the ring 160 ' is made of sheet metal as well as the washer 72' without any treatment of said parts due to the presence of the disc 160 '' '.
- the internal sheet metal ring 160 ′ is joined to the cast iron reaction plate 16 ′ by crimping referenced as S. More precisely, the external edge of the ring 160 ′ has lugs of axial orientation 160 ′′ through each a 16 '' stage hole made in the reaction plate 16.
- each hole is therefore wider with the formation of a shoulder v for connection between the larger end of the hole 16 '' and the main section thereof.
- the material of the free end of each tab 160 '' is folded locally, here laterally, in contact with one shoulder v for crimping.
- the lateral face of the reaction plate 16 ′, facing the primary flywheel 12 ′ is generally in the extension of the internal ring 160 ′ so that it is possible to accommodate the friction washer in a cage delimited by the parts 18 ', 72', 160 'in which reduces the axial size of the torque limiter 19' and the torsion damping flywheel so that the web, that has the friction disc hub, does not need to have a tortuous shape.
- the first hub 6 can be attached, for example, by welding to the transverse element 14 of the primary flywheel 12 consisting of a sheet metal flange as visible in FIG. 9.
- This flange 14 carries a mass 229 at its external periphery, for example in sheet metal.
- the flange 14 has at its outer periphery legs 14 'embedded in the mass 229 and fixed by overmolding on the mass 229, the cast iron of which enters the holes t' of the legs 14 '.
- Axial lugs 14 '', directed towards the reaction plate 16, are obtained locally by cutouts and folding of the flange and serve as support for the elastic damping devices 15, here in the form of coil springs arranged circumferentially.
- the sheet metal part 371 also has at its external periphery axial tabs 375 directed towards the flange 14 and extending radially above the tabs 373, 14 '' and 372. Notches (not referenced) are made at the end free of the legs 375 for penetration into the latter of radial fingers 376 belonging to the internal periphery of a friction washer 377 in friction contact with the external periphery of the flange 14 under the action of a Belleville washer 378 bearing on a washer 379 fixed to the mass 229 for example by screwing or any other means.
- the washer 377 is therefore also a control washer belonging to the friction means 46 located radially below the reaction plate 16.
- the springs 15 are compressed between the lugs 14 '' and 372, 373 and the sheet metal part 371 rotates, possibly after taking up a circumferential clearance, the washer 377 which makes the friction means 46 active.
- the internal ring 160 is fixed in the aforementioned manner on the plate of reaction 16, here in cast iron.
- the lateral faces of the ring are respectively engaged with the part 371 and a Belleville washer 70 bearing on the web 180 while being locked in rotation on the balusters 374 for example using lugs (not referenced) provided with a notch engaged on a baluster 374.
- the lateral faces of the ring 160 are coated with an anti-wear layer or are hardened so as not to be worn quickly, in particular by the Belleville washer.
- the face of the part 371, generally of transverse orientation, facing the ring 160 is also coated with such a coating or is hardened.
- a friction lining is interposed between the ring 160 and the part 371. This lining can be freely mounted or be fixed to one of the elements part 371 - ring 160.
- the torque limiter 19 therefore has very small axial dimensions and comprises the parts 371, 160.70. Thanks to the balusters 374, the part 371 constitutes the abutment of the ring 160 and the web 180 against the abutment.
- the limiter is simple as is the double damping flywheel.
- Belleville washer 379 can be linked in rotation by cooperation of shapes with the mass 229.
- reaction plate In all cases, one can choose the material of the reaction plate to have the right mass of inertia for the secondary flywheel for a given mass of inertia of the primary flywheel. Just choose the material of the reaction plate.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/555,858 US6287205B1 (en) | 1998-10-07 | 1999-10-07 | Dual mass damping flywheel, in particular for motor vehicle |
JP2000574855A JP2002526732A (ja) | 1998-10-07 | 1999-10-07 | 自動車用2質量ダンピングフライホイール |
DE19982216T DE19982216B4 (de) | 1998-10-07 | 1999-10-07 | Zweimassen-Dämpfungsschwungrad, insbesondere für Kraftfahrzeuge |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9812567A FR2784430B1 (fr) | 1998-10-07 | 1998-10-07 | Double volant amortisseur, notamment pour vehicule automobile |
FR98/12567 | 1999-07-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000020777A1 true WO2000020777A1 (fr) | 2000-04-13 |
WO2000020777A9 WO2000020777A9 (fr) | 2000-09-21 |
Family
ID=9531301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002409 WO2000020777A1 (fr) | 1998-10-07 | 1999-10-07 | Double volant amortisseur, notamment pour vehicule automobile |
Country Status (6)
Country | Link |
---|---|
US (1) | US6287205B1 (fr) |
JP (1) | JP2002526732A (fr) |
KR (1) | KR100602306B1 (fr) |
DE (1) | DE19982216B4 (fr) |
FR (1) | FR2784430B1 (fr) |
WO (1) | WO2000020777A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803346B1 (fr) * | 1999-12-30 | 2002-04-26 | Valeo | Embrayage double, en particulier pour vehicule automobile |
JP2002181085A (ja) * | 2000-12-14 | 2002-06-26 | Nsk Warner Kk | トルクリミッター付ダンパー組立体 |
KR100422643B1 (ko) * | 2001-06-15 | 2004-03-12 | 현대자동차주식회사 | 자동차용 플라이휠 |
US6668995B2 (en) * | 2002-05-14 | 2003-12-30 | Ford Global Technologies, Llc | Variable inertia flywheel |
FR2844856B1 (fr) * | 2002-09-24 | 2005-12-30 | Valeo Embrayages | Filtre pour transmission a changement de rapport automatise, continu ou non, notamment pour vehicule automobile |
KR101555496B1 (ko) * | 2008-01-15 | 2015-09-24 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 발광 장치 |
US20110017168A1 (en) * | 2009-07-24 | 2011-01-27 | Briggs & Stratton Corporation | Weighted centrifugal clutch |
DE102018112496A1 (de) * | 2018-05-24 | 2019-11-28 | Rockwell Collins Deutschland Gmbh | Schwungrad mit tilgermassen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2749904A1 (fr) * | 1996-06-17 | 1997-12-19 | Valeo | Volant double amortisseur muni d'un limiteur de couple a montage simple |
FR2754034A1 (fr) | 1996-09-30 | 1998-04-03 | Valeo | Double volant amortisseur, notamment pour vehicule automobile, comportant des moyens perfectionnes d'amortissement par friction des vibrations |
FR2769062A1 (fr) | 1997-09-30 | 1999-04-02 | Valeo | Dispositif elastique d'amortissement, en particulier pour double volant amortisseur, et double volant amortisseur equipe d'un tel dispositif |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5176233A (en) * | 1985-06-04 | 1993-01-05 | Daimler-Benz Ag | Apparatus for reducing vehicle drive train vibrations |
FR2605695B2 (fr) * | 1986-08-21 | 1990-01-12 | Valeo | Dispositif amortisseur de torsion pour systeme de transmission de couple |
JPH0640996Y2 (ja) * | 1988-04-11 | 1994-10-26 | 株式会社大金製作所 | 分割型フライホイール組立体 |
FR2663388B1 (fr) * | 1990-06-15 | 1992-09-11 | Valeo | Double volant amortisseur, notamment pour vehicule automobile. |
US5146811A (en) * | 1990-12-24 | 1992-09-15 | Luk Lamellen Und Kupplungsbau Gmbh | Vibration damping apparatus |
FR2695579B1 (fr) * | 1992-09-15 | 1994-11-25 | Valeo | Procédé pour l'assemblage de deux pièces et ensemble de deux pièces, en particulier partie primaire d'un amortisseur de torsion, ainsi assemblées. |
DE4318165C1 (de) * | 1993-06-01 | 1994-08-04 | Rohs Ulrich | Drehschwingungsdämpfer |
FR2718815B1 (fr) * | 1994-04-14 | 1996-05-31 | Valeo | Volant amortisseur, notamment pour véhicule automobile. |
FR2725003B1 (fr) * | 1994-09-28 | 1997-01-10 | Valeo | Dispositif amortisseur de torsion |
-
1998
- 1998-10-07 FR FR9812567A patent/FR2784430B1/fr not_active Expired - Fee Related
-
1999
- 1999-10-07 DE DE19982216T patent/DE19982216B4/de not_active Expired - Fee Related
- 1999-10-07 US US09/555,858 patent/US6287205B1/en not_active Expired - Lifetime
- 1999-10-07 KR KR1020007006137A patent/KR100602306B1/ko not_active IP Right Cessation
- 1999-10-07 JP JP2000574855A patent/JP2002526732A/ja active Pending
- 1999-10-07 WO PCT/FR1999/002409 patent/WO2000020777A1/fr active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2749904A1 (fr) * | 1996-06-17 | 1997-12-19 | Valeo | Volant double amortisseur muni d'un limiteur de couple a montage simple |
FR2754034A1 (fr) | 1996-09-30 | 1998-04-03 | Valeo | Double volant amortisseur, notamment pour vehicule automobile, comportant des moyens perfectionnes d'amortissement par friction des vibrations |
FR2769062A1 (fr) | 1997-09-30 | 1999-04-02 | Valeo | Dispositif elastique d'amortissement, en particulier pour double volant amortisseur, et double volant amortisseur equipe d'un tel dispositif |
Also Published As
Publication number | Publication date |
---|---|
DE19982216B4 (de) | 2010-04-08 |
KR20010032819A (ko) | 2001-04-25 |
FR2784430A1 (fr) | 2000-04-14 |
KR100602306B1 (ko) | 2006-07-14 |
WO2000020777A9 (fr) | 2000-09-21 |
US6287205B1 (en) | 2001-09-11 |
FR2784430B1 (fr) | 2001-08-24 |
DE19982216T1 (de) | 2001-01-18 |
JP2002526732A (ja) | 2002-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2778441A1 (fr) | Double volant amortisseur de torsion, notamment pour vehicule automobile | |
FR2688564A1 (fr) | Double volant amortisseur, notamment pour vehicules automobiles. | |
EP0708893B1 (fr) | Plateau de reaction pour embrayage a friction, notamment pour vehicule automobile | |
EP0723636A1 (fr) | Amortisseur de torsion refroidi par circulation d'air | |
FR2754034A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile, comportant des moyens perfectionnes d'amortissement par friction des vibrations | |
WO2000020777A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile | |
EP0996832B1 (fr) | Double volant amortisseur de torsion, notamment pour vehicule automobile | |
FR2778217A1 (fr) | Butee de debrayage a amortissement de vibration | |
WO1998042994A1 (fr) | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile | |
EP0728267B1 (fr) | Volant amortisseur, notamment pour vehicule automobile | |
FR2784429A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile | |
WO2000020776A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile | |
EP0749541B1 (fr) | Volant amortisseur, notamment pour vehicule automobile | |
EP0948720B1 (fr) | Double volant amortisseur de torsion a rondelles d'etancheite, notamment pour vehicules automobiles | |
EP0892899B1 (fr) | Moyeu pour preamortisseur notamment pour vehicule automobile et dispositif amortisseur de torsion comportant un tel moyeu | |
FR2784431A1 (fr) | Double volant ammortisseur, notamment pour vehicule automobile | |
EP0688405A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile | |
FR2756343A1 (fr) | Volant double amortisseur a elasticite axiale | |
EP0926374B1 (fr) | Embrayage à friction à dispositif de rattrapage d usure, notamment pour véhicule automobile | |
WO2023110931A1 (fr) | Dispositif d'amortissement de torsion | |
FR2736121A1 (fr) | Double volant amortisseur, notamment pour vehicule automobile | |
FR2674920A1 (fr) | Embrayage a plateaux de pression terminal et intercalaire, notamment pour vehicules automobiles de sport et plateau de pression terminal d'un tel embrayage. | |
FR2794831A1 (fr) | Volant amortisseur de torsion, notamment pour vehicule automobile | |
FR2785349A1 (fr) | Double volant amortisseur de torsion a rondelles d'etancheite, notamment pour vehicules automobiles | |
FR2746159A1 (fr) | Volant amortisseur, notamment pour vehicules automobiles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): DE JP KR US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020007006137 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09555858 Country of ref document: US |
|
AK | Designated states |
Kind code of ref document: C2 Designated state(s): DE JP KR US |
|
COP | Corrected version of pamphlet |
Free format text: PAGES 1/7-7/7, DRAWINGS, ADDED |
|
RET | De translation (de og part 6b) |
Ref document number: 19982216 Country of ref document: DE Date of ref document: 20010118 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 19982216 Country of ref document: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 1020007006137 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020007006137 Country of ref document: KR |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |