WO1999058868A1 - Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile - Google Patents
Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile Download PDFInfo
- Publication number
- WO1999058868A1 WO1999058868A1 PCT/FR1999/001162 FR9901162W WO9958868A1 WO 1999058868 A1 WO1999058868 A1 WO 1999058868A1 FR 9901162 W FR9901162 W FR 9901162W WO 9958868 A1 WO9958868 A1 WO 9958868A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clutch
- friction
- wear
- friction clutch
- pressure plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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- 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
- F16D28/00—Electrically-actuated clutches
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- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
- F16D25/083—Actuators therefor
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- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
- F16D25/126—Details not specific to one of the before-mentioned types adjustment for wear or play
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- 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
- F16D29/00—Clutches and systems of clutches involving both fluid and magnetic actuation
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- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
Definitions
- the present invention relates to a friction clutch, in particular for a motor vehicle, and relates more particularly to a clutch equipped with a wear compensation device. in particular friction linings, referred to below as a wear take-up device.
- a conventional friction clutch generally comprises a reaction plate, possibly in two parts to form a damping flywheel, fixed in rotation on a first shaft, usually a driving shaft such as the crankshaft of the internal combustion engine, and supporting by its outer periphery a cover to which is attached at least one pressure plate.
- the pressure plate is integral in rotation with the cover and the reaction plate while being able to move axially under the stress of elastic engagement means with controlled axial action, generally a metal diaphragm bearing on the cover, while a friction disc , carrying friction linings at its outer periphery, integral in rotation with a shaft, usually a driven shaft such as the input shaft of the gearbox, is interposed between the pressure plate and the reaction plate of so as to be clamped together when the clutch is in the engagement position.
- the engagement means control the axial movement of the pressure plate when they are actuated in an antagonistic manner by a declutching stop.
- a friction clutch equipped with a wear take-up device is arranged so that one of the supports of the engagement means, either the support linked directly or indirectly to the cover, or the support linked directly or indirectly to the pressure plate, is axially adjustable, a means, called compensation, being provided to achieve this offset, and means, called actuation, allowing the implementation, in fact the actuation, of said compensation means. Enter well.
- a wear take-up device is controlled by a means, called a detection means, sensitive to the wear of the linings, directly or indirectly, that is to say for example sensitive to the position of at least the one of the components of the clutch influenced by said wear; the strategy of the catching-up operation is defined by a means, called triggering means, which, controlled by the detection means, itself controls the actuation means by authorizing or not the entry into function of the actuation means .
- Different types of wear take-up device are known.
- document FR-A-2 753 503 describes a clutch in which the wear take-up device comprises ramp means arranged circumferentially, constituting the compensation means, placed axially between the adjustable support and the pressure plate and adapted to be driven in rotation by means of a toothing which they carry at their periphery and with which a worm screw arranged tangentially cooperates, means for driving the worm in rotation being provided, made operational by wear.
- friction linings as well as non-return means preventing the worm from rotating in the opposite direction to that in which it is rotated by the rotational drive means when they are operational
- the worm, the non-return means and the means for driving the worm in rotation being carried by a support integral with the cover, and the elastic axially acting engagement means being constituted by a diaphragm.
- the means for rotating the worm are controlled by the diaphragm;
- the ramp means consist of a ring having the adjustable support of the diaphragm and inclined and circumferentially distributed ramps and the pressure plate has studs or ramps intended to cooperate with the ramps of the ramp means;
- the worm is slidably mounted along its axis while being subjected to the action of an elastic means called catch-up, constituting the actuating means, and, when it is moved along its axis, it drives in circumferential lotation said ramp means.
- the means for driving the worm in rotation are constituted by a ratchet wheel secured to the worm and the non-return means are constituted by a pawl which cooperates with the ratchet wheel.
- the detection means is a tongue actuated by the diaphragm and adapted to cooperate with the ratchet wheel, its stroke increasing with wear until being able, when the clutch is engaged, to push a tooth of the ratchet wheel and rotate the screw by compressing the elastic take-up means;
- the triggering means is represented by a reduction in the load on the support cord, when disengaging, the elastic take-up means, when its load is sufficient to overcome the friction forces, allowing the displacement of the inclined ramps and therefore the axial offset of the plate support.
- the engagement means consist of a diaphragm and the adjustable support is also the plate support; the compensation means is also constituted by ramps; the actuating means is a spring which acts permanently between ramps and counter-ramps in the direction of increasing the axial thickness; here again the triggering means is achieved by a reduction in the load on the support cord while the pressure plate moves, depending on wear, with respect to a pin bearing on the reaction plate, said pin constituting the detection means.
- the engagement means are also constituted by a diaphragm, the compensation means by ramps and the actuation means by a spring acting permanently between the ramps and here the cover;
- the adjustable support is the primary support carried by the cover;
- the clutch is of the pushed type and the release is obtained by subsidence of the secondary support, located opposite the primary support on the pressure plate side, mounted elastically, the maximum clutch release load increasing with wear , this constituting the detection means.
- the detection means is a pin disposed with clearance. Between the cover and the reaction plate and passing through the pressure plate with friction; tripping is obtained by zeroing with play of the load of the clutch means during disengagement; the actuating means is a spring which acts permanently between the pressure plate and the ramps which constitute the compensation means; it is the plate support which is movable, the clutch device being of the pulled type.
- the elements are similar to those of the previous document except that the compensation means is an axial unidirectional freewheel and the actuation means a spring urging permanently the balls pressing against their ramps.
- the detection means is a pin disposed with clearance between the cover and the pressure plate and passing through the cover with friction; tripping is obtained by zeroing with clearance of the load of the clutch means comprising declutching levers associated with helical springs bearing on the cover; the actuating means is a spring which acts between the cover and a rotating ring provided with ramps intended to cooperate with counter-ramps; the cover support is therefore movable, the clutch being of the pulled type.
- the declutching operation is carried out by means of a linkage adapted to act in an antagonistic manner on the engagement means, said linkage being controlled by an actuator;
- an actuator comprising maneuvering means with an electric motor, a mechanical transmission having an input element formed by the shaft of the electric motor, an output element for acting on the linkage, elastic assistance means acting between a fixed part and an element of the transmission antagonistically relative to the engagement means, the electric motor so providing only that a small force to disengage the clutch.
- the operating means can be of the hydraulic type.
- the actuator comprises motor means.
- the elastic assistance means store the energy of the engagement means during the engagement operation of the clutch and restore it at the time of the disengagement operation; thus the electric motor provides only the difference between the effort of the engagement means and the effort of the elastic assistance means. Thanks to the wear take-up device, the stroke of the elastic assistance means is reduced, the holding is excellent and they can thus be installed conveniently in the actuator.
- the wear take-up device being mounted within the clutch device, the elastic assistance means bear, on the one hand, on a fixed part and, on the other hand, on a part movable in translation and fixed in rotation, forming a nut which cooperates with the shaft of the electric motor forming a screw, said nut forming the output element of the mechanical transmission while being capable of acting on the wheelhouse.
- the elastic assistance means consist of a helical spring surrounding the nut or a series mounting of Belleville washers.
- the nut can act either by pulling or by pushing on the linkage, which can conventionally comprise a declutching fork acting on the declutching stop; it can also include a hydraulic control having a hydraulic receiver whose piston acts on the clutch release bearing and a transmitter whose piston is controlled by the nut of the actuator; it goes without saying that the nut could also act on a cable or pneumatic linkage.
- a friction clutch in particular for motor vehicles, comprising, on the one hand, a clutch device comprising engaging means and declutching means, the engaging means bearing on a cover, integral a rotary flywheel, for action on a pressure plate and tightening the friction linings of a friction disc between the pressure plate and the flywheel, forming a reaction plate, and, on the other hand, a wheelhouse to act antagonistically on the clutch means by means of the declutching means, an actuator to control said wheelhouse, and a wear take-up device, to compensate for the wear of at least the friction linings, the wear take-up device being mounted within the clutch device and the actuator comprising maneuvering means with an electric motor, control means are provided to control the timing of the make-up operation.
- control means are arranged so that they authorize the catch-up operation when a certain number of conditions are met; alternatively, the control means are arranged so that they force the catch-up operation to intervene when a certain number of conditions are fulfilled.
- These conditions can be defined on the basis of information generated by sensors, such as for example the speeds of rotation of the input and output shafts, the input and *-output torques leading to an image of licking, the vehicle speed, or others, the operation of which guarantees a certain driving comfort.
- control means are advantageously arranged so that two types of declutching stroke are provided, a stroke called normal stroke and a stroke called overtravel, greater than the normal stroke, the wear take-up device not being adapted to be operational. than during a clutch disengagement overtravel; preferably, the control means do not authorize an overrunning clutch until after a given number of normal strokes have taken place.
- the wheelhouse comprises a hydraulic control which comprises a receiver having a piston and a transmitter having a piston; alternatively, the wheelhouse comprises a cable or a pneumatic connection.
- the wheelhouse includes a clutch release fork.
- one of the supports of the engagement means is axially offset and a compensation means, implemented by an actuating means, is provided to achieve this offset, said actuating means being controlled by a triggering means itself. even controlled by a detection means, sensitive to the wear of the linings.
- the adjustable support is the support linked to the pressure plate; alternatively, the adjustable support is the support for the cover.
- FIG. 1 is a schematic sectional view of a clutch according to the invention.
- FIG. 2 is a schematic view of the actuator associated with the clutch of Figure 1.
- the clutch device 1 0 in Figure 1 is of the type described in document FR-A-2 753 503 to which reference will be made for more details, knowing that here in Figure 1 everything is shown schematically ; in this figures, the clutch device 1 0 comprises a flywheel 1 1 for rotating, a friction disc 1 2 carrying at its outer periphery friction linings 1 3, a pressure plate 1 4, a cover 1 5 fixed on the flywheel 1 1, a diaphragm 1 6 acting between, on the one hand, the cover 1 5 and, on the other hand, the pressure plate 1 4, here by means of support means 1 7 , and a wear take-up device 1 8 comprising ramp means 1 9 carried by the pressure plate 14.
- the flywheel 1 1 possibly divided here forms a reaction plate offering a friction face dorsally to a friction lining 1 3; the flywheel 1 1 is integral in rotation with a first shaft, such as a driving shaft.
- the pressure plate 1 4 frontally has a friction face for the other friction lining 1 3; dorsally, it has studs 24 intended to cooperate with ramps 25 belonging to the ramp means
- the ring 1 9 here consist of a ring having the ramps 25 inclined and distributed circumferentially; the ring 1 9 is here metallic and has bearing zones constituting the support means 1 7 for the diaphragm 1 6, here for the outer periphery of the Belleville washer thereof; it also has a toothing 26 at its external periphery.
- the pressure plate 1 4 is integral in rotation with the - / opening 1 5 here of hollow form with a centrally perforated bottom, and this with axial mobility by means of elastic tongues, not shown, exercising a return function of the plate of pressure 1 4 towards the bottom of the cover 1 5 carrying columns, not visible in the figure, with profiled head for pivoting mounting of the diaphragm 1 6, more precisely from the internal periphery of the Belleville washer of the diaphragm 1 6, on the cover 1 5 whose bottom has, facing the profiled heads of said columns forming a secondary support, another support, said primary support, formed for example by stamping its bottom.
- the friction disc 1 2 has at its internal periphery, in known manner, a hub 27 internally grooved for its rotational connection to a second shaft, such as a driven shaft.
- the first shaft here is the crankshaft of the engine on which the flywheel 1 1 is fixed carrying the pressure plate 1 4, the cover 1 5 and by pinching the friction disc 1 2 whose central hub 27 is here linked in rotation to the input shaft of the gearbox constituting the second shaft and this disengageably, the friction linings 1 3 being normally clamped between the plate 10
- the wheelhouse has hydraulic control; this comprises, on the one hand, a receiver 20, the piston 21 of which acts, directly or by means of a declutching fork, on the declutching stop, the piston 21 which can, as shown here, constitute itself even the clutch release bearing, and, on the other hand, a transmitter 30 whose piston 31 is controlled by an actuator 40.
- the piston 31, said control, of the transmitter 30 is slidably mounted in a cylindrical chamber 32, said control, connected to a reservoir 41 via an orifice 42 which passes through its cylindrical wall; the piston 30 of the transmitter 31 is biased pa; a return spring 33 towards. -jne rest position in which said orifice 42 is free, then putting the control chamber 32 into communication with the reservoir 41.
- the piston 21 of the receiver 20 is slidably mounted in a cylindrical chamber 22, called the receiving chamber, connected to the control chamber 32 by a pipe 43; the piston 21 of the receiver 20 is biased by a spring 23 said application applying the piston 21 of the receiver 20 in application against the clutch release bearing or the clutch release fork, here against the fingers of the diaphragm.
- the clutch is therefore normally engaged.
- To disengage the clutch it is necessary, using the piston 21 of the receiver 20, to act on the internal end of the fingers of the diaphragm 1 6 to rotate the latter around the balusters in order to gradually cancel the load it exerts on the pressure plate 1 4, more precisely on the support means 1 7.
- the elastic tabs usually of tangential orientation, then recall the pressure plate 1 4 towards the bottom of the cover 1 5 to release the linings 1 3.
- the clutch is then disengaged.
- the diaphragm 1 6 in which the diaphragm 1 6 is in contact with the primary support carried by the bottom of the cover 1 5.
- the piston 21 of the receiver 20 therefore acts antagonistically on the diaphragm 1 6 by being controlled by the actuator 40.
- the friction linings 1 3 wear as well as, to a lesser extent, the friction faces of the pressure plate 1 4 and of the flywheel 1 1.
- the pressure plate 1 4 therefore approaches the flywheel 1 1.
- the diaphragm 1 6 in the free state has a frustoconical shape; once mounted in the clutch device, its taper varies.
- the characteristic curve of the diaphragm is a function of its dimensions, its thickness and the height of the heart trunk of its Belleville washer part. Its characteristic curve (load exerted - deflection) conventionally has an increasing pace until a maximum, then a decreasing pace until a minimum to then increase.
- the diaphragm 1 6 occupies a position corresponding to a point on the decreasing part of its characteristic curve.
- a clutch release bearing is adapted to act on the internal end of the fingers of the diaphragm 1 6. This stop is slidably mounted along a guide tube secured to the gearbox. The guide tube is internally traversed by the input shaft of the gearbox. The stop can be subjected to the action of a clutch release pivotally mounted on a fixed part of the vehicle, such as the gearbox housing. 1 2
- the latter acts by pushing or pulling on the latter, depending on the type of clutch.
- the clutch instead of being of the pushed type like that of Figure 1 - the clutch release bearing acting by pushing on the diaphragm 1 6 to disengage the clutch - said clutch can be pulled type - the clutch release bearing then acts by pulling on the internal end of the diaphragm fingers 1 6 to disengage the clutch.
- the external peripheral part of the Belleville washer of the diaphragm 1 6 is supported on the cover 1 5, while the inner periphery of said Belleville washer is then supported on the support means 1 7 carried by the pressure plate 1 4.
- the release bearing comprises a ball bearing with, on the one hand, a rotating ring in direct contact with the diaphragm 1 6 in the case of a clutch of the pushed type or in indirect contact with the diaphragm 1 6 by means of a docking piece located behind diaphragm 1 6 in the case of a clutch of the pulled type and, on the other hand, a non-rotating ring coupled, for example by a spring of self-centering or a cover, to an operating sleeve subjected to the action of a control member, such as the declutching fork, acting by pushing or pulling, as the case may be, on said sleeve.
- a preload spring usually acts to keep the clutch release bearing on the diaphragm in constant contact, in the manner of the application spring 23 of the receiver 20 of the diagram in FIG. 1.
- the wear take-up device 1 8 includes means for detecting the wear of the friction linings 1 3 (and to a lesser extent the wear of the pressure plate 1 4 and of the flywheel 1 1) associated with 1 3
- drive means for rotating the support means 1 7, usually when the clutch is in the disengaged position.
- the detection means may include a pin carried by friction, for example by the pressure plate 14, to cooperate with the flywheel 1 1 or the cover 1 5.
- This pin is associated with elastic means, for example coil springs, allowing the support means 1 7 to rotate in the event of wear, and this when the clutch is disengaged.
- elastic means for example coil springs
- the detection means comprise a blade carried by the cover 1 5 cooperating with the inclined teeth of a ratchet wheel secured to an axis which also slidingly carries an endless screw 28.
- the thread and the pitch of the screw without fir.-28 are adapted to the teeth 26 carried by the ring 1 9 and form an irreversible system, the worm 28 being able to move the teeth 26, but not the reverse.
- Said axis is carried by a support which also carries a helical catching spring, forming elastic catching means, surrounding the axis; a non-return pawl is adapted to cooperate with the teeth of the ratchet wheel.
- the armed take-up spring is then, when its load is sufficient to overcome friction, caused to rotate the worm 28 then causing the ring 1 9 to rotate, which, by cooperation of the ramps 25 with the studs 24 - which can be replaced in a variant by ramps complementary to the ramps 25 - of the pressure plate 1 4, moves axially so that the bearing zones approach the bottom of the 1 4
- the thickness is therefore increased between the support means 1 7 and the friction face of the pressure plate 1 4 in contact with the friction linings 1 3 of the friction disc 1 2.
- the wear take-up device 1 8 comprises an endless screw 28 mounted to slide along its axis while being subjected to the action of an elastic take-up means. It is when the endless screw 28 is moved along its axis, by the action of the compressed catching spring during the detection of wear, that it causes the ramp means 1 9 in circumferential rotation, the load of the resilient catch-up spring increasing with wear of the friction linings 1 3, the axial displacement being obtained by afiion of the spring when its load is high enough to rotate the ring 1 9 and overcome the friction due to the return force due to the elastic tongues for rotationally connecting the pressure plate 14 with the cover 1 5 acting on the ring 1 9 to urge the latter in contact with the diaphragm, the clutch being disengaged.
- the ratchet wheel and the blade constitute rotational drive means made operational by the wear of the friction linings 1 3 when the clutch is engaged.
- the non-return pawl prevents the endless screw 28 from turning in the opposite direction to that in which it is rotated by the rotational drive means when they are made operational.
- the implantation of the wear take-up device 1 0 within the clutch device makes it possible to simplify the actuator 40 consisting of an electric motor 50, a mechanical transmission 60 and elastic assistance means 70.
- the electric motor 50 thus drives the mechanical transmission 60 according to a stroke independent of the wear of the friction linings 7 and / or of the plate 1 and of the flywheel 2. 1 5
- the elastic assistance means 70 allow the electric motor 50, in a manner known from document FR-A-2,564,920, to develop only a small force. These elastic means 70, in the manner of an elevator, store the energy of the diaphragm 1 6 during the passage of the latter from its disengaged clutch position to its clutch engaged position (that is to say during engagement clutch) and restores it when disengaging (change from clutch engaged position to disengaged clutch position). The elastic assistance means 70 therefore act in an antagonistic manner with respect to the diaphragm 1 6.
- the elastic assistance means 70 do not exert force or a weak force on the linkage and therefore on the diaphragm 1 6. This is possible throughout the life of the clutch because the diaphragm 1 6, thanks to the wear take-up device 1 8, always occupies the same position.
- the power supply terminals of the electric motor 50 are connected to an electronic module located outside the actuator 40 or alternatively partly in the actuator.
- This module includes, for example, a microcomputer, such as a microprocessor, information processing circuits and, for example, power transistors connected in series to control the motor in both directions of rotation.
- the electronic module belongs to an electronic circuit comprising a certain number of sensors sending information to the electronic module. These sensors capture in particular the speed of the driving (crankshaft) and driven (input shaft of the gearbox) shafts, the actuator stroke, the condition of the gearbox (gear engaged), l state of the gear shift lever (force sensor) and others.
- the rotary motor 50 is therefore not 1 6
- the elastic assistance means 70 bear on a fixed part and on a mobile part forming a nut as described below.
- the actuator comprises a flange 91 on which the electric motor 50 is fixed, for example using screws (we see in Figure 2 the axis of the screws).
- This flange 91 carries at its internal periphery a fixed support 79, here rounded, of annular shape and a ball bearing 52 carrying the output shaft 51 of the electric motor.
- This flange 91 is dc centrally perforated for passage of the shaft 51 " and is shaped to form a bearing support.
- the output shaft 51 of the electric motor 50 is thus, in known manner, fixed in translation and mobile in rotation when the motor is electrically powered.
- the flange 91 is integral with a housing 90 having at its rear end a sleeve 64 provided with a guide groove 65. More precisely, the flange 91 constitutes a cover for the housing 90 of hollow form and is fixed on the front end open of the housing 90, the bottom 66 of which is perforated centrally and carries the sleeve 64.
- the housing 90 - flange 91 assembly forms a fixed casing and is fixed to a fixed part of the vehicle, for example the casing of the gearbox.
- the housing 90 or the flange 91 has for this purpose non-visible ears.
- the shaft 51 has a threaded end and constitutes the input element of the mechanical transmission 60.
- the shaft 51 is engaged with a nut 61 of tubular shape.
- This nut 61 includes an annular movable support 78, here rounded, carried by a radially projecting collar 68 capable of coming into abutment against the bottom 66 of transverse orientation of the housing 90; an annular skirt 67 of axial orientation extends the bottom 66. 1 7
- the nut 61 is fixed in rotation and axially movable.
- four Belleville washers 71 to 74 mounted in series are provided.
- Force transmission means 75 to 77 intervene between the external and internal peripheries of the adjacent Belleville washers.
- the washers 71 to 74 are capable of being crossed by the output shaft 61.
- the Belleville washer 71 at the rear end bears on its internal periphery on the movable support 78 and on its external periphery on a rod 75 in intimate contact with the internal periphery of the skirt 67.
- the second washer Belleville 72 is supported at its outer periphery on the rod 75 and at its internal periphery on a rod 77 carried by a sleeve 1 77 sliding along the smooth and cylindrical external periphery, here stepped, of the nut 61 internally threaded. isnt.
- the third Belleville washer 73 rests on its internal periphery on the ring 77 and on its external periphery on a ring 76 in intimate contact with the internal periphery of the skirt 67; the Belleville washer at the front end 74 bears on its outer periphery on the rod 76 and on its inner periphery on the fixed support 79.
- the Belleville washers 71 to 74 In the engaged clutch position (upper part of the figure), the Belleville washers 71 to 74 have a generally flat configuration and are bandaged. During the clutch release operation, these Belleville washers relax to counterbalance the action exerted by the diaphragm on the clutch release bearing.
- Rotary connection means 63, 65 exist between the housing 90 and the nut 61 forming the output element of the mechanical transmission 60.
- the nut 61 thus performs a translational movement while being linked in rotation to the housing 90.
- the rotational connection means here consist of a key 63 carried by the nut 61 engaging in the groove 65 of the sleeve 64 for guiding the nut 61.
- the assistance spring consists of a coil spring surrounding the nut resting on the fixed support and a flange secured to the nut .
- control means are provided for controlling the timing of the actual catching operation.
- control means are arranged so that they authorize the catch-up operation when a certain number of conditions are met.
- control means force the catch-up operation to intervene when a certain number of conditions are met.
- control means are advantageously arranged so that two types of declutching stroke are provided, a stroke called normal stroke and a stroke called overtravel, greater than the normal stroke, the wear take-up device not being adapted to be operational. than during a clutch disengagement overtravel; preferably, the control means do not authorize an overrunning clutch until after a given number of normal strokes have taken place.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99919334A EP0995048A1 (fr) | 1998-05-13 | 1999-05-14 | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile |
| DE19980959T DE19980959T1 (de) | 1998-05-13 | 1999-05-14 | Reibungskupplung mit Verschleißnachstellvorrichtung, inbesondere für Kraftfahrzeuge |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR98/06009 | 1998-05-13 | ||
| FR9806009A FR2778707B1 (fr) | 1998-05-13 | 1998-05-13 | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999058868A1 true WO1999058868A1 (fr) | 1999-11-18 |
Family
ID=9526294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1999/001162 Ceased WO1999058868A1 (fr) | 1998-05-13 | 1999-05-14 | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0995048A1 (fr) |
| DE (1) | DE19980959T1 (fr) |
| FR (1) | FR2778707B1 (fr) |
| WO (1) | WO1999058868A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101807141B1 (ko) | 2016-04-18 | 2018-01-10 | 현대자동차 주식회사 | 마모 보상장치를 구비한 클러치 액추에이터유닛 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1610017A1 (fr) | 2004-06-21 | 2005-12-28 | LuK Lamellen und Kupplungsbau Beteiligungs KG | Dispositif de transmission de couple et son agencement |
| CN113700767B (zh) * | 2021-09-02 | 2023-03-24 | 长春一东离合器股份有限公司苏州研发中心 | 一种离合器执行器的磨损补偿装置 |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141513A (en) * | 1983-06-15 | 1984-12-19 | Sachs Systemtechnik Gmbh | Controllable drive for releasing a motor vehicle friction clutch |
| FR2564920A2 (fr) | 1984-05-28 | 1985-11-29 | Valeo | Rattrapeur d'usure pour la commande d'un dispositif d'accouplement tel qu'embrayage |
| FR2599446A1 (fr) | 1986-06-03 | 1987-12-04 | Valeo | Embrayage a friction a rattrapage d'usure continu |
| EP0277049A1 (fr) * | 1987-01-09 | 1988-08-03 | Valeo | Procédé de commande d'embrayage à actionnement motorisé |
| FR2613987A1 (fr) * | 1987-04-16 | 1988-10-21 | Tallec Philippe | Dispositif de commande automatique pour un embrayage a friction, applica |
| GB2294301A (en) | 1991-11-26 | 1996-04-24 | Luk Lamellen & Kupplungsbau | Friction clutch |
| GB2294983A (en) | 1994-11-11 | 1996-05-15 | Fichtel & Sachs Ag | Automatic wear adjustment in a friction clutch for a motor vehicle |
| US5564541A (en) | 1994-06-21 | 1996-10-15 | Dana Corporation | Travel limit for an automatically adjusting friction torque device |
| FR2753503A1 (fr) | 1996-09-17 | 1998-03-20 | Valeo | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile |
| FR2753659A1 (fr) * | 1996-09-25 | 1998-03-27 | Valeo | Embrayage a friction a actionneur electromecanique, notamment pour vehicule automobile |
| FR2753660A1 (fr) | 1996-09-25 | 1998-03-27 | Valeo | Embrayage a friction a actionneur electromecanique, notamment pour vehicule automobile |
-
1998
- 1998-05-13 FR FR9806009A patent/FR2778707B1/fr not_active Expired - Lifetime
-
1999
- 1999-05-14 EP EP99919334A patent/EP0995048A1/fr not_active Withdrawn
- 1999-05-14 WO PCT/FR1999/001162 patent/WO1999058868A1/fr not_active Ceased
- 1999-05-14 DE DE19980959T patent/DE19980959T1/de not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141513A (en) * | 1983-06-15 | 1984-12-19 | Sachs Systemtechnik Gmbh | Controllable drive for releasing a motor vehicle friction clutch |
| FR2564920A2 (fr) | 1984-05-28 | 1985-11-29 | Valeo | Rattrapeur d'usure pour la commande d'un dispositif d'accouplement tel qu'embrayage |
| FR2599446A1 (fr) | 1986-06-03 | 1987-12-04 | Valeo | Embrayage a friction a rattrapage d'usure continu |
| EP0277049A1 (fr) * | 1987-01-09 | 1988-08-03 | Valeo | Procédé de commande d'embrayage à actionnement motorisé |
| FR2613987A1 (fr) * | 1987-04-16 | 1988-10-21 | Tallec Philippe | Dispositif de commande automatique pour un embrayage a friction, applica |
| GB2294301A (en) | 1991-11-26 | 1996-04-24 | Luk Lamellen & Kupplungsbau | Friction clutch |
| US5564541A (en) | 1994-06-21 | 1996-10-15 | Dana Corporation | Travel limit for an automatically adjusting friction torque device |
| GB2294983A (en) | 1994-11-11 | 1996-05-15 | Fichtel & Sachs Ag | Automatic wear adjustment in a friction clutch for a motor vehicle |
| FR2753503A1 (fr) | 1996-09-17 | 1998-03-20 | Valeo | Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile |
| FR2753659A1 (fr) * | 1996-09-25 | 1998-03-27 | Valeo | Embrayage a friction a actionneur electromecanique, notamment pour vehicule automobile |
| FR2753660A1 (fr) | 1996-09-25 | 1998-03-27 | Valeo | Embrayage a friction a actionneur electromecanique, notamment pour vehicule automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101807141B1 (ko) | 2016-04-18 | 2018-01-10 | 현대자동차 주식회사 | 마모 보상장치를 구비한 클러치 액추에이터유닛 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0995048A1 (fr) | 2000-04-26 |
| DE19980959T1 (de) | 2000-07-13 |
| FR2778707A1 (fr) | 1999-11-19 |
| FR2778707B1 (fr) | 2000-08-11 |
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