FR2782353A1 - Friction clutch for minimising fuel consumption of motor vehicle, comprises high inertia bell shaped flywheel which carries rotor of electrical machine and friction clutch with torque damper - Google Patents

Abstract

A driving crankshaft (11) is fixed to a bell shaped high inertia flywheel (13) which carries the rotor (6) of an electrical machine (2) and is coupled to a driven shaft (12) through a friction clutch (20,37) and torque damper (20a). The electrical machine (2) has a fixed stator (5) and may operate as an alternator or starter motor. The torque damper has two guidance rings (29,30) and a buckle (34)

Description

The invention relates to a clutch device with

  friction fitted with a rotary drive wheel.

  The invention more particularly aims, in a motor vehicle, to allow the automatic stopping and restarting of the internal combustion engine, when the vehicle is stopped for a short time - vehicle waiting at a fire

  red for example - to save fuel.

  Such a clutch device is known from the document

FR-A-2 604 229.

  In this, the clutch device essentially consists of a conventional friction clutch and an electromagnetic coupling auxiliary clutch, arranged between a rotating element secured to the reaction plate of the friction clutch and a flywheel. flywheel mounted rotating coaxially to the drive shaft, by means of a ball bearing mounted on an axial spacer interposed between the crankshaft

  vehicle engine and reaction plate.

  Referring to Figure 1 of this document, we see that this

  clutch device is bulky axially.

  In addition, the electromagnetic clutch uses a plate integral in rotation with the reaction plate while being

  axially movable relative thereto.

  The present invention therefore aims to reduce the axial size of the clutch device while eliminating the presence of an electromagnetic plate clutch. According to the invention, a clutch device mentioned above, comprising on the one hand, a drive wheel having at one front end for its attachment to a driving shaft and, a rear end in the form of a reaction plate hollow with a central recess delimited externally by a friction face, and on the other hand, a friction disc comprising at least one friction lining for contact with the friction face of the reaction plate, said lining being integral with a support resiliently coupled, by means of a torsion damper, to a central hub intended to be secured in rotation to a driven shaft and characterized in that the torsion damper penetrates into the central recess of the reaction plate and in that the flywheel carries between its front and rear ends the rotor of a machine

  rotary electric comprising a fixed stator coaxial with the rotor.

  In one embodiment, the torsion damper comprises a first guide washer integral with the support and

  a second guide washer.

  A web linked in rotation, possibly after taking up a clearance is interposed between the two guide washers. The second guide washer is located in the recess

center of the reaction plate.

  The support can be distinct from the first guide washer by being integral with the latter for example by small columns connecting the two guide washers in

  so that the support is attached to the first guide washer.

  Alternatively, the support is in one piece with the first

guide washer.

  Thanks to the invention, the axial size is reduced since the torsion damper is mainly installed in the central recess of the reaction plate. In addition, the drive wheel carries the rotor of an electric machine which eliminates the presence of a clutch.

electromagnetic plates.

  The electric machine is shaped to form a starter

  for the internal combustion engine and an alternator.

  The flywheel, known as the flywheel, has very high inertia. You can shut down the internal combustion engine, or heat engine, of the vehicle at a red light, for example. The steering wheel, and therefore the heat engine can be restarted easily and quickly by the electric machine then playing the role of a starter. We can thus save

  fuel. The electric machine therefore forms an alternator-starter.

  It also makes it possible to filter vibrations and avoid stalling the heat engine by operating as an electric motor. For more precision on such a machine, we will refer

in document WO 98/05882.

  In one embodiment, the clutch release device is of the concentric type to reduce the axial space between the clutch and the bottom of a surrounding bell

the friction clutch.

  Advantageously, additional bearing means are interposed between the flywheel and a carrier part fixedly carrying the stator. This results in the possibility of guaranteeing

  a precise and small air gap between the stator and the rotor.

  The drive wheel can be monobloc with the plate

  for cost reasons.

  Alternatively, the drive wheel is in several parts or parts and comprises, in addition to the reaction plate, a tube or

  a base or a tree for its attachment to the driving shaft.

  So the two parts of the steering wheel can be two

  different materials to adjust the flywheel inertia.

  In addition, the flywheel can easily be dynamically balanced, for example by removing material at the periphery

external of the reaction plate.

  In addition, the dust generated by the friction of at least one of the friction linings that the friction clutch device comprises, does not risk polluting the electric machine since it is located at the front of the reaction plate . Preferably the reaction plate has a skirt at its outer periphery on which the cover of a

friction clutch.

  Thanks to this arrangement, no dust from

  friction linings, will not soil the electric machine.

  This result can also be obtained with the supporting part when the latter is adjacent to the reaction plate and envelope.

partly the rotor and the stator.

  This part constitutes a heat shield thus sparing the

electric machine.

  It will be appreciated that the location of the second guide washer, generally of the friction damper, in the recess of the reaction plate displaces the center of gravity of the assembly constituted by the electric machine and the clutch. at

  friction towards the driving shaft and therefore towards the electric machine.

  Thanks to this arrangement, bearing means can be mounted on the drive wheel and carry the stator of the machine by means of a load-bearing part. Thus, these bearing means will be close to the center of gravity of the assembly and therefore provided. Balancing of the assembly can be achieved easily by adding or removing material on the reaction plate very close to the center of gravity. It will be appreciated that the torsional damper can have the desired configuration to dampen vibrations. It can be thicker and include, in addition to the wall and the two guide washers, auxiliary sails to increase the travel

  angular between the hub and the friction lining (s).

  The description which follows illustrates the invention with regard to

  of the accompanying drawings in which: - Figure 1 is an axial sectional view of an assembly

  electric friction clutch machine according to the invention.

  - Figures 2 and 3 are views similar to Figure 1

  for 2 other examples of implementation.

  - Figures 4 to 6 are views similar to Figure 1 without the central part of the friction disc for respectively

  a fourth, a fifth and a sixth exemplary embodiment.

  - Figure 7 is a partial view of a device

stator cooling.

  - Figure 8 is a view similar to Figure 7 in a

another example of realization.

  - Figure 9 is an axial sectional view of a flywheel similar to that of Figure 1 equipped with a removable mounting plate. - Figure 10 is a half schematic view of the device

  concentric type clutch equipped with a force sensor.

  - Figure 11 is a view of the characteristic curve of

  diaphragm brought back to the release bearing.

  - Figure 12 is a view similar to Figure 6 in a

another example of realization.

  In the figures, the common elements will be assigned

same reference numbers.

  In these figures, a cutout assembly 1 is shown and

  starting an internal combustion engine.

  This assembly 1 comprises an electric machine 2 and a friction clutch 3 comprising a reaction plate 4 in

moldable material, here cast iron.

  Alternatively, the reaction plate is made of moldable material based on aluminum and has a coating for cooperating with a

  friction lining 16 described below.

  The electric machine 2 comprises a stator 5 and a rotor 6 mounted coaxially, and radially one above the other with the formation of a gap 7 between the stator 5 and the

rotor 6.

  In the figures, the stator 5 surrounds the rotor 6, but of course, as a variant, the rotor 6 can surround the stator 5 provided with a winding of electric wires, the ends of which can be seen at 8

called updos.

  The rotor 6 and the stator 5 each have a packet of

  sheets 9 and 10 respectively, here in soft iron.

  In addition, the rotor 6 is provided with a squirrel cage 60 in

copper or aluminum.

  The sheets are annular in shape and are, for example, isolated by oxidation in contact with each other. Alternatively,

  insulators separate the sheets from each other.

  Sheet packs 9 and 10 form a crown

axial orientation.

  In known manner, the sheets of the stator 5 have

  notches for the passage of the aforementioned windings or coils.

  These windings are connected to a block or electronic control and power unit controlled by a computer receiving information from sensors measuring in particular the rotational speeds of a driving shaft 11, constituted by the output shaft of a motor of internal combustion and a driven shaft 12 forming the input shaft of a movement transmission box, as well as a displacement sensor, measuring by

  example the displacement of the clutch bearing.

  The assembly 1 is interposed between the trees 11 and 12.

  The clutch 3 constitutes a cut-off and starting member.

  When the clutch is engaged (engaged), the engine torque is transmitted from the driving shaft 11 to the driven shaft 12. When the clutch is disengaged (disengaged), a cut occurs so that the driven shaft 12 is no longer driven by the driving shaft 11. The reaction plate 4 constitutes the rear end of a drive wheel 13 of annular shape, having at the front,

  a front face fixed on the end of the driving shaft 11.

  According to one characteristic, the flywheel 13, usually called the flywheel, carries the rotor 6 of the electric machine 2

  between its front and rear ends.

  The flywheel assembly 13 - rotor 6 - clutch 3 constitutes a friction clutch device; the flywheel 13 constituting the clutch input element 3 and the rotor support 6 of the

electric machine 2.

  The electric machine 2 here makes it possible to start the internal combustion engine. For this, an electric current controlled by the stator is passed with a frequency and intensity determined by an electronic control by the computer receiving information on the starting condition of the vehicle. In this case, the electric machine 2 rotates faster

than a conventional starter.

  The electric machine 2 also constitutes an alternator when the internal combustion engine is running. This machine here of the asynchronous type forming an electric motor. It can be of any type, namely for example, with radial or axial flux, asynchronous, synchronous with magnets in the air gap or buried, with flux switching with single or hybrid magnets - de-energization by stator winding - with brushless claws , variable reluctance, single and double excitation, cross flow with Vernier effect. The machine filters the vibrations generated by said internal combustion engine. She permits

  accelerate the engine and prevent it from stalling.

  It helps to brake the engine and deliver more power

  important than conventional alternators.

  The electric machine 2 also makes it possible to facilitate the gear change by synchronization of the shafts 11 and 12, the

  machine braking or accelerating the shaft 11.

  According to another characteristic, the machine 2 makes it possible to stop the internal combustion engine at red light and then restart it while saving fuel because of the great inertia of the flywheel 13 equipped with the rotor 6. For example, the neutral point being engaged and ignition key in the rolling vehicle position, the engine is shut down after two seconds and put back into

  route as soon as we change gears.

  For more details on such a machine, reference is made to document WO 98/05882. Thus, in FIG. 1, we see at 40, a toothed ring arranged at the outer periphery of the reaction plate 4 and associated with a radial sensor, not visible in all the figures, in particular for picking up the speed of rotation of the electric machine 2. Here, in the case of an application for a motor vehicle, the driving shaft 11 is the crankshaft of the internal combustion engine of the vehicle, while the driven shaft 12 is the input shaft of the gearbox integral with a clutch bell 14 forming a fixed casing. The input shaft 12 crosses the bottom of the bell 14 surrounding most of the clutch 3 rotatably mounted around an axis XX aligned with that of the shafts 11 and 12. The rotor 6 is thicker than the reaction plate 4 forming with the flywheel 13 the input element of the friction clutch, and therefore of the friction clutch device. The output element of this clutch is constituted by at least one central hub 15 internally fluted for its rotational connection with the driven shaft 12 externally fluted to take place at its end. The hub 15 is rigidly or resiliently coupled with at least one friction lining 16 intended to be clamped between the reaction plate 4 and a pressure plate 17 under the action of clutch means 18 with axial action acting on the plate. pressure 17 and bearing on a cover 19

  secured to the reaction plate 4, here by screwing.

  The friction lining 16 and the hub 15 belong respectively to the external periphery and to the internal periphery of a friction disc 20 comprising at least one support 21 carrying the friction lining 16 and coupled to the hub 15. The

  support 21 can be embedded in the lining 16.

  Preferably, two friction linings 16 are provided, being fixed on either side of the support 21 for progressive tightening of the linings 16 between the plates 4, 17 and a

  assistance when disengaging the clutch.

  Such a support is described for example in document FR-A-2 693 778. The fastening of the linings 16 can therefore be carried out by riveting .; alternatively, the linings are fixed by gluing to the central bearing area of a tripod blade, which makes it possible to reduce the thickness of the friction linings and therefore

axial dimensions.

  The friction faces of or linings 16 are therefore normally clamped between the plates 4, 17 so that the clutch is normally engaged. To disengage the clutch, it is therefore necessary to provide declutching means 22 to at will counteract the action of the clutch means 18 in order to release the friction lining (s) 16 and disengage the clutch. These declutching means 22 are controlled by a declutching stop 23 acting in thrust or by pulling on the internal end of the declutching means 22. The stop belongs to a device for

clutch 24.

  The friction clutch 3 therefore comprises a reaction plate 4, possibly in 2 parts for the formation of a damper flywheel or a flexible flywheel, which is locked in rotation on the crankshaft 11 and which supports at its external periphery, here by screws, a cover 19 to which is attached, with axial mobility, at least one pressure plate 17; several plates 17 and several friction discs 20 which can be provided as visible

  for example in FIG. 4 of the document FR A 1 280 746.

  The pressure plate 17 is integral in rotation with the cover 19 and therefore with the reaction plate 4, while being able to move relative to the latter by means of elastic tongues 25, here tangential, better visible in the document.

FR A 1 280 746.

  Clutch means 18 act between the bottom of the cover 19, here in the hollow form, and the pressure plate 17. These declutching means bear on the bottom of the cover 19 and on an unreferenced boss of the pressure plate to tighten the

  friction linings 16 between plates 4 and 17.

  The declutching means 22 can consist of declutching levers associated with helical springs as described in document FR A 1 280 746. Alternatively, it may be two Belleville washers mounted in series and subjected to the action of

  declutching levers forming the declutching means.

  In the figures shown, the engaging means 18 and declutching means 22 belong to the same annular part called diaphragm, having an annular peripheral part 18 forming Belleville washer extended by a central part fragmented into radial fingers 22 by blind slots, not visible in the figures, the bottoms of which form enlarged orifices at the internal periphery of the Belleville washer 18 of the

diaphragm.

  In the figures, the diaphragm 18, 22, is pivotally mounted on the internal periphery of its Belleville washer 18 by means of a primary support 26 carried by the bottom of the cover 19 and a secondary support 27 carried by assembly means 28 passing through the enlarged orifices of the diaphragm. Here the primary support 26 is formed by stamping the bottom of the cover while the secondary support 27 belongs to a ring ring carried by lugs 28 passing through the enlarged orifices of the diaphragm 18, 22 and forming the aforementioned assembly means, as described in document FR A 2 585 424 to which reference will be made for more details. As a variant, the assembly means may include tabs or columns as described in FIGS. 7 to 15 of the

document FR A 2 456 877.

  Thus, in the engaged clutch position, the diaphragm bears on the primary support 26 and on the boss, which the pressure plate 17 has on the back. To disengage the clutch, action is taken using the clutch stop 23 , in the figures shown by pushing, on the internal ends of the fingers of the diaphragm to rotate the latter which then takes support on the secondary support 27 formed at the external periphery of

the rush crown.

  During this operation, the load exerted by the diaphragm 18, 22 on the pressure plate 17 decreases, then vanishes, the tongues 25 exerting a return action of the plate in the direction of the bottom of the cover 19 of hollow form in order to release

the friction linings 16.

  In these figures, the outer periphery of the washer

  Belleville 18 is supported on the boss of the pressure plate.

  As a variant, the structures are reversed so that the external periphery of the Belleville washer 18 is supported on the cover 19, while the internal periphery of the Belleville washer 18 is supported on the boss of the pressure plate 17, as

  visible for example in document FR-A 2 606 477.

  In light of this last document, it can be seen that the clutch 3 can be equipped with a wear take-up device to compensate for the wear of the friction linings 16. The pressure plate 17, by virtue of the tabs 25 forms unitarily a sub-assembly with the cover 19 and the diaphragm 18, 22. This sub-assembly is called the clutch mechanism and is intended to be fixed here by screwing on the reaction plate 4 as visible in the figures; the cover 19 generally having the shape of a hollow dish with an external radial rim of

  fixing to plate 4 and a bottom with central hole.

  The friction disc 20 is in the figures of the elastic type, that is to say that the support 21 is coupled elastically to the hub 15 by means of a torsion damper 20a here with elastic members 35, 36 with action circumferential in the form of coil springs. More specifically, the support 21 is attached to a first guide washer 29 integral with a second guide washer 30 by small posts 31. These small posts 31 are also used here for fixing the support 21 in the form of a disc, for example of the type of that described in document FR-A 2 693 778. The balusters 31

  axially pass through openings 32 formed in a web 34.

  The first 29 and the second guide washer 30 are arranged on either side of the web 34 integral in rotation with the hub 15, here after taking up an angular play. This angular play is determined by means of engagement with play occurring between the periphery of the internal web 34 and the external periphery of the hub 15, teeth of the web 34 penetrating at

  clearance in the notches of the hub 15 and vice versa.

  The springs 35, with circumferential action are mounted in non-referenced windows practiced opposite in the web 34 and the two guide washers 29, 30. Springs 36, of lower stiffness than the springs 35, elastically couple the web 34 to the hub 15 as described in document FR-A 2 726 618 to which reference will be made for more details. This document also describes the elastic means with axial action and the friction means intervening between the first washer of

guide 29 and the web 34.

  Between the web 34 and the second guide washer 30, there is a bearing intervening between the hub 15 and the second guide washer 30, said bearing being integral in rotation with the web 34 and serving as a housing for the spring 36. Of course, the disc 20 can have another shape, for example that described in FIGS. 1 to 4 of the document FR-A2693778. The veil 34 can

be secured to the hub 15.

  As is evident from the description, the

  reaction plate 4 dorsally has a friction face 37 for contact with the lining 16 of the friction disc 20. The friction linings 16 are intended to be clamped between this friction face 37 and that which faces the pressure 17 This friction face 37 internally delimits a central recess 39 so that the flywheel 13 is centrally hollow. According to one characteristic, the second guide washer 30 penetrates inside this recess 39, radially below the face 37, to reduce the axial size. Thus, the second guide washer 30 is further from the pressure plate 17 and the

  cover 19 than is the first guide washer 29.

  This washer 30 is located in the recess 39.

  The friction disc 20 therefore has at its external periphery at least one friction lining 16 secured to a support 21 elastically coupled by a torsion damper a to a central hub 15. The damper 20a penetrates into

  the recess 39 delimited externally by the friction face 37.

  In the embodiment of Figure 1, the declutching device 24 comprises a declutching fork 50 pivotally mounted on the bottom of the bell 14 using a ball joint 51 integral with the bell 14. The end upper fork is shaped to receive the end of a cable connected to the clutch pedal. The control of the clutch release bearing 23 is thus of the manual type, this clutch release bearing 23 comprising, in known manner, a ball bearing one of the rings of which is rotating and is shaped for local contact with

  the internal ends of the fingers 22 of the diaphragm 18, 22.

  The other ring of the bearing is fixed and bears against the flange that a sleeve 53 subjected to the action of the internal fingers of the clutch release fork 50. The sleeve 53 slides along a guide tube 52 secured to the bell 14. The guide tube 52 is crossed by the shaft 12 engaging the hub 15. In this figure we see the different inclinations of the fork 50 during the declutching operation, the visible diaphragm 18, 22 being generally plan in clutch engaged position. In the upper part of FIG. 1, the clutch is engaged, while in the lower part, the clutch is disengaged. Here, the inner ring of the bearing of the stop 23 is rotating while the outer ring of said bearing is fixed and has a radial flange in contact with the transverse flange of the sleeve 53 under the action of an elastic washer with axial action urging the rim of the outer ring in contact with said flange. The stop can thus move radially relative to the flange and is of the self-centering type, an existing radial clearance

  between the outer ring and the sleeve 52.

  Thanks to the invention, the stop 23 can come as close as possible to the first guide washer 29, which makes it possible to reduce

axial dimensions.

  The recess 39 in FIG. 1 is internally stepped in the form of a staircase. Thus, this recess comprises a first annular portion of axial orientation 38 connecting at the rear to the friction face 37 and at the front to an annular shoulder of radial orientation 41. A second annular portion of axial orientation 42 is connected at the rear to said shoulder 41 and at the front to the transverse rear face of a fixing sleeve 43 whose periphery is in intimate contact with the external periphery of the crankshaft 11. The second portion 42 therefore has a diameter lower than that of the first portion 38. The flywheel 13 is in one piece and therefore has at the front at its internal periphery the sleeve 43 provided with holes 44 for the passage of fixing screws 45 of the flywheel 13 to the crankshaft 11. The front face of the sleeve 43 is in contact with the crankshaft 11. The end

  front of the steering wheel 13 is therefore intended to be fixed to the shaft 11.

  The screws 45 are housed inside the second portion 42. Radially above the fixing sleeve 43, the flywheel 13 is thickened to form a sleeve 46 of axial orientation. This sleeve is delimited internally by the portion 42 and the sleeve 43 and externally by a cylindrical surface 47 used for mounting the packet of sheets 9 of the stator 6. This range

  mounting 47 is delimited at the rear by a shoulder 48.

  Radially, beyond the sleeve 46, the drive wheel 13 is extended by the reaction plate 4 provided at its periphery with the ring gear 40. This reaction plate 4 is of decreasing thickness from its internal periphery to its periphery external so that an axial clearance exists between the squirrel cage 60 and the reaction plate 4 as well as between the buns 8 and the reaction plate 4. The decreasing thickness of the reaction plate 4 is determined to avoid any interference with the rotor 5 and the stator 6. The plate 4 is therefore provided with a

  undercut for buns 8.

  The package of sheets 9 of the rotor 6 is mounted by hooping on the mounting surface 47 of axial orientation until it abuts against the shoulder 48. Thus the package of sheets 9 is heated, which

  subsequently cool for attachment to the bearing surface 47.

  As a variant, the sheet package 9 is fixed by a device

  grooving and keys on the bearing 47.

  As a variant, the plate pack 9 is fixed by splines intervening between the sheet pack 9 and the bearing surface 47.

  As a variant, the sheet pack is welded to the surface 47.

  Alternatively, the sheet pack 9 is fixed by means of screws passing through the sheet pack 9 and the shoulder 48 to be screwed into the reaction plate 4, the screw heads bearing on a fixing ring in contact with

  the front end of the front sheet package.

  As a variant, the sleeve 46 has at its outer periphery a frustoconical bearing while the sheet pack 9 has at its inner periphery a complementary bearing. Fixing the

  pack of sheets 9 therefore takes place by conical fitting.

  In all cases, the rotor 6 is integral, both axially and in rotation, with the flywheel 13 in one piece in FIG. 1; said flywheel 13 being obtained by molding here of cast iron so that this flywheel 13 with its rotor 6 has a great inertia. In addition, an angular indexing of the rotor 6 relative to the

steering wheel 13.

  The rear end of the steering wheel 13 is formed by the

reaction plate 4.

  The stator 5 is similarly fixed to the rotor 6 on a spacer 61. For example the outer periphery of the rotor 5 is fixed on the inner periphery of the spacer 61 by hooping alternatively by splines, alternatively by welding, etc. . And this

angularly indexed.

  The spacer 61 has an annular shape and is notched for

  passage of a connector 63 connected to the ends of the windings.

  Another connection device coming from the aforementioned control device, also forming a power device, is connected to

  the connector 63 to supply the windings of the rotor 5.

  The spacer 61 is interposed between the free end of the bell 14 and the engine block 62. The bell 14 has at its free end a radial flange for bearing the heads of the fixing screws 64 passing through the spacer 61 to be fixed on the block

motor 62.

  Note that in Figure 1 the second guide washer 30 is housed in the space delimited by the section 38 and the shoulder 41, only the inner end of the second guide washer 30 penetrates a little deeper into the inside the recess

tier 39.

  Of course, as a variant as shown in FIG. 2, the drive wheel 13 is in several parts or parts, namely, a reaction plate 4 of hollow shape and an annular spacer 130, 131, 46 generally in shaped section of U. This spacer is interposed between the plate 4 and the crankshaft 11 while being centered by said crankshaft. The spacer 130, 131, 46 centers at its rear end the reaction plate 4. To do this, the spacer is hollowed out at the rear. The first branch of the U, namely the inner or lower branch closest to the axis XX, is generally a form of internal tube 131 provided with holes for the passage of a first series of screws 145, the heads of which are supported on the reaction plate and the body of which passes through the reaction plate 4 and the internal tube 131 to be screwed into the crankshaft. The inner tube 131 has a second series of holes with a smaller diameter than that of the first series of holes for screwing in a second series of screws 245 fixing the plate.

reaction 4 to spacer 130.

  The outer branch 46 or upper of the spacer 130, 131, 46 is constituted by the sleeve 46 used for mounting the rotor 6

  in the same way as in Figure 1.

  The sleeve is therefore delimited by a shoulder 48 which is here turned towards the reaction plate 4. The bottom 130 of the U of the spacer 130, 131, 46 extends generally transversely and connects the two branches 46, 131 of ring shape and

axial orientation.

  The spacer 130, 131, 46 has an upper rotor support branch and a lower fixing branch constituting

the spacer itself.

  The inner tube 131 carries at its outer periphery bearing means 132. These bearing means consist for example of a ball bearing in a row of balls in a variant with two

rows of balls.

  As a variant, the bearing means 131 comprise two

ball bearings.

  The internal ring of the ball bearing (s) is therefore fitted onto the internal periphery of the internal tube 131 while the external ring of the ball bearing (s) 132 is fitted inside an annular skirt 133 belonging to the periphery of a support piece 134 carrying at its outer periphery spacer 61 on which the stator 5 of the machine is fixed

  electric 2 in the same way as in figure 1.

  The support piece 134 generally follows the shape of the reaction plate 4 by being at a distance from it adjacent to it. This piece has a tortuous shape because of the

presence of buns 8.

  The skirt 133, of axial orientation, enters the cavity

  delimited by the branches 46, 131 of the spacer 130, 131, 46.

  The support piece 134 is in one piece with the skirt 133 and the spacer 131 having come from molding therewith. This part 134 is for example based on aluminum. The same is true of

the spacer 130, 131, 46.

  The supporting part 134 partially envelops the stator 6 and the rotor 5 and therefore forms a shield-shaped mask preventing any

  pollution of the electric machine 2.

  The reaction plate 4 is made of cast iron as in FIG. 1.

  Thus, it is possible to modify the inertia of the drive wheel as the spacer 130, 131, 46 is lighter than a cast iron part. Of course, if desired, this spacer can be made of cast iron. The reaction plate has, as in FIG. 1, a friction face 37 delimited internally by a first

  annular portion of axial orientation 38.

  The reaction plate 4 has at its internal periphery a ring 140 generally of axial orientation connected by an internally inclined portion of frustoconical shape 142 to the reaction plate 4 proper. The series of screws 145, 245 have heads bearing on the ring 140. Thanks to the frustoconical portion 142, the second guide washer 30 of the torsion damper 20 can be housed inside the central recess of the reaction plate 4 delimited by the ring

140 and the portions 142, 38.

  Thanks to the inclined portion 142, interference is avoided

  between the friction disc 20 and the heads of the screws 145, 245.

  It will be appreciated that with respect to FIG. 1, there is a precise and small air gap 7 thanks to the bearing means 132 and to the part.

carrier 134.

  Thus, the air gap between the rotor and the stator remains independent and insensitive to all disturbances related to the operation of the heat engine: beat, vibrations, games If the hyperstatism is too important, we will favor the

solution shown in Figure 5.

  Thanks to the two sets of screws 145, 245, it is possible to manufacture, in a first place of manufacture, the machine 2 equipped with the spacer 130, 131, 46. Then, fix the reaction plate using the screws 145 and fix in final the flywheel 13 on the crankshaft using the screws 145. Then, after inserting the

  disc 20, the clutch mechanism 17, 25, 19, 18, 24 is fixed.

  Alternatively, and in order to increase the inertia of the clutch mechanism 17, 18, 19, 24, 25, it is possible to use a cover 19

cast.

  Of course, as shown in FIG. 3, it is possible to further reduce the axial size by eliminating the declutching fork 50. In this case, the declutching device 24 is of the concentric type because it is traversed centrally by the driven shaft 12 The declutching device 24 can be of the cable control type as described in US-5,141,091. In this case, the declutching stop 23 is carried by a driven part fixed in rotation and movable in translation, for example by means of elastic tongues connecting a flange of the driven part to a housing.

  integral with the bell 14. The driven part is in relation to

  nut with a fixed leading part in translation and movable in rotation for example by means of a ball bearing intervening between the fixed box and the driving part which carries at its periphery a pulley for the winding of the control cable

  operated by the clutch pedal.

  As a variant as shown in FIG. 3, the declutching device 24 is of the hydraulic type as described in the document FR-A-2,730,532. In this case, the declutching stop 23 is carried by a piston 241 movable axially with respect to the guide tube 52 secured for example by crimping an external body 242 fixed on the clutch bell 14 for example using ears as described in document FR-A-2,730, 532. The external body 242 surrounds the guide tube and defines therewith a blind annular cavity 243 of axial orientation, the bottom of which is constituted by a radial rim which the guide tube at its rear end. This radial rim is for example fixed by crimping on the outer body 242 provided with a control fluid supply inlet, such as oil, connected to a non-visible bore opening into the cavity 243 at its bottom. . The piston 241 penetrates into the cavity 243 and delimits therewith a variable volume chamber. A preload spring 244 acts between the body 242 and the front end of the piston 241 to maintain the stop 23 in constant support against the ends of the fingers 22 of the diaphragm 18,22. There is also a protective bellows 245 surrounding the spring 244. Compared to FIG. 1, the outer ring 23 of the bearing is rotating while the inner ring of the bearing is fixed. For more details, see document FR-A-2,730,532. It can be seen that the distance between the bottom of the bell 14 and the cover 19 is reduced due to the absence of a fork 50. In fact, in FIGS. 1 and 2, it is necessary to provide additional space for the angular movements of the fork. The declutching device 24 thus forms the hydraulic receiver of a hydraulic control, the transmitter of which is actuated either manually by the declutching pedal or semi-automatically by actuator with electric motor controlled according to predetermined programs for changing the gear ratio. by an electronic computer receiving information in particular from sensors measuring the speed of rotation of the shafts 11 and 12, as well as the displacement

  of the clutch release bearing 23 of the plate 17.

  These sensors can be used to control the electric machine 2. Of course as a variant, the reaction plate 4 has a ring 40 as in FIG. 1 allowing a sensor to measure the speed of rotation of the driving shaft 11. The sensor can be of the optical type so as not to be disturbed by

* magnetic phenomena.

  The sensors can be placed in any suitable location and therefore serve both to control the electric machine 2 and to control the actuator with the above-mentioned electric motor, the electronic computer being common to the electric machine 2 and

  to the electric motor actuator.

  It is evident that the electric machine thus makes it possible to synchronize the speeds of rotation of the shafts 11 and

  12 by accelerating or braking the shaft 11.

  The change of speed ratio is thus easier and

  faster because the speed of the two shafts is synchronized.

  The vehicle being stopped at a red light, neutral position engaged, the displacement of the stop, as well as the change of gear ratio provide, via sensors, information for

restart the engine.

  Of course, as visible in FIG. 4, the sleeve 46 can be in one piece with the reaction plate 4 and extend axially in the direction of the crankshaft 11. The bearing means 132 intervene between the internal periphery of the sleeve 46 and the outer periphery of the skirt 133 of the support piece 134 carrying the stator 5 while the hub 46 carries the rotor 6 at its outer periphery. It can be seen that with respect to FIG. 3, the structures have been inverted, the carrier part 134 being turned over to extend in the vicinity of the casing 62 of the heat engine. Note that in Figures 2 to 4, the bearing means 132 extend above the fixing screws 145. In this figure 4 the spacer 230 consists of a shaft passing through the central opening of the ring 140 by a centering nose, at the front, the shaft 130 is hollowed out at 231 for its centering by the crankshaft 11. As in FIG. 3, the second guide washer, not shown, enters the central recess of the pressure plate delimited by the ring 140 and the portions 142, 38. It will be noted that the portion 38 is shorter than in Figures 2 and 3 while the portion 142 is more inclined. In FIGS. 2 and 3, the supporting part 134 forms a dust cover and a thermal screen because it extends in the immediate vicinity of the reaction plate 4 and envelops the rotor and the stator. Thus, in particular the metallic particles coming from the friction linings 16 of the friction disc 20 do not risk polluting the

  electric machine 2, thus guaranteeing good performance.

  The central recess 39 of the flywheel 13 therefore consists of the central recess of the reaction plate 4 delimited externally by the friction face 37 of contact with the

trim 16.

  In Figure 4, the reaction plate has at its outer periphery an annular skirt of axial orientation 144 surrounding the friction linings 16 so that the dust from the linings 16 will not pollute the machine

electric 2.

  In addition, a groove 148 is provided at the internal periphery of the skirt 144 to collect the dust. This groove is connected to the friction face 37 of the reaction plate by a vertical flank and has in section a bottom in an arc of a circle extended by an inclined flank. Of course, the groove 148 can have any other shape. However it will be appreciated that the inclined flank directs the impurities towards the pressure plate 17. The impurities are centrifuged in the groove 148 constituting a

anti-pollution throat.

  Of course, in Figure 1, the plate 4 can be provided

of such a skirt 144 with groove 148.

  All combinations are possible. Note that at the

  FIG. 4 the spacer 61 is separate from the support piece 134.

  The load-bearing part 131 is fixed directly to the engine block 62 using fixing screws 164 passing through radial holes in the holes 165 made in ears 166 which have the

  load-bearing part beyond its external periphery.

  The spacer 61 is distinct from the load-bearing part which carries at its external periphery an annular skirt 261 for mounting the

  stator 5, for example by shrinking as described above.

  The spacer 61 is hollowed out for the passage of the ears 166 distributed for example regularly at 120 degrees. The number

  of ears depends on the application.

  Of course, the bearing means 132 can be located on the same circumference as the fixing screws 245 as visible in FIG. 5. In this case, the sleeve 46 always belongs to the reaction plate whose internal ring 140 is widened to its base for presenting grooves and meshing with a shaft 330 having ears 331 for its fixing using screws 245 the crankshaft 11. The rear end of the shaft is grooved to cooperate with the grooves of the ring 140 . So,

  the reaction plate 4 is linked in rotation to the shaft 330.

  The ring 140 is fixed axially by a washer 333 fixed by screws 334 at the end of the shaft 330. On the other side, the ring 140 is fixed axially by the internal ring of the ball bearing constituting the bearing means 132. This bearing is interposed axially between the ring 140 and the heads of the screws 245. The bearing part 134 of the stator 5 carries spacers 61 and has a much straighter shape than in FIG. 4. It will be noted in FIGS. 4 and 5 that one can rib the supporting parts 134 to stiffen them which is not easy in Figures 2 and 3. In Figure 5, the ribs are of greater amplitudes than in Figure 4 On note that the fixing members 64 are resiliently mounted in the through holes 461 of the spacer 61, to avoid hyperstatism during the crankshaft deflections, more precisely, the fixing members 64 are surrounded by a split pin it - even surrounded by two pads shouldered 463, for example made of an elastomer such as rubber, placed at the ends of the through holes 461. A certain degree of freedom therefore exists between the fixing members 64, here in the form of a stud and the sole 61 so that the load-bearing part is not flanged and is centered on the shaft 330 by the ball bearing 132 with the creation of a small and precise air gap. Of course, this type of mounting

  elastic is applicable in Figures 1 to 3.

  Of course, it will be noted that the central recess of the reaction plate 4 in which the second guide washer 30 of the friction disc 20 is housed is delimited here by the ring 140 and the

  annular portion of axial orientation 38.

  Thus, the torsional damper 20a can be thicker. We

  can even mount two torsional dampers in parallel.

  In FIG. 6 in which the structure has been inverted with respect to the structure in FIG. 5 so that the spline connection is located at the front and not at the rear, more precisely, in this embodiment, the ring 140 extends radially a little more radially inwards in the direction of the axis XX to present a shaft 430 centrally, the front end of which is grooved so as to engage with grooves which internally has a fixing base 431 fixed by screws 345 to crankshaft 11 of the engine. The support piece 134 is integral with the spacers 61 as in FIG. 5 with an elastic mounting between the spacers and the fixing members 64. The bearing means 132 are located axially between the ring 140 and the base 431 and consist of two bearings ball. The supporting part 134 has a bushing 432 at its internal periphery by which it is mounted on the outer rings of the bearings 132 with a flange

  intermediate 433 to separate the two ball bearings 132.

  The sleeve 432 is provided with holes 545 radially above the bearings 132 for access by means of tools to the heads of the fixing screws 345. Thus, the tools for fixing the screws pass through the support piece 134 and the ring 140. Of course, as described in document FR-A 2 718 208, the fixing tools can also pass through the friction disc. To do this, simply provide the friction disc with a pre-damper

  raised. Note that in Figures 2 and 3, the pre-

  torsional damper is of the type described in document FR A 2 718 208. This pre-damper therefore comprises a web fixed to the hub 15 and two guide washers arranged on either side of the web and assembled together by clipping at

  using legs used for the rotary drive of the pre-

shock absorber with web 34.

  Of course, with respect to this document FR-A2718208, the second guide washer must be mounted in the recess of the reaction plate, that is to say, turning the disc over.

friction 20.

  In this case, it is of course necessary to provide holes in the diaphragm for the passage of the screw fixing tool (s), knowing that the said fixing tools can belong to a

  screwdriver or be individual tools.

  In this case, a module can be formed comprising the reaction plate 4, the friction disc 20 and the clutch mechanism unitarily comprising the plate 17, the

  diaphragm 18, 22 and cover 19.

  This unit module can be easily balanced, this is the reason why we see in 1000 in FIG. 6 a balancing chamfer produced at the outer periphery of the reaction plate 4. Thus, more or less material can be removed from the desired locations to dynamically balance the friction clutch-electric machine assembly here because, in FIG. 6, the electric machine 2 - friction clutch 3 assembly, base 431 can be produced, then screw in place using screws 345

the assembly on the crankshaft 11.

  Of course, the screw fixing tool (s) 345

  may not pass through friction and the clutch mechanism.

  In this case, a drive flywheel 13 electric machine 2 and base 431 sub-assembly can be produced which can be dynamically balanced and then mounted on the crankshaft 11 using the screws 345. Then, the friction disc then the clutch mechanism is fixed knowing that it can be dynamically balanced in a known manner, for example by drilling in the desired places the pressure plate 17 and or adding balancing rivets fixed for example on the flange

cover device.

  It will be noted that in FIG. 6, the base 431 is wedged axially, on the one hand, at the rear on the shaft 430 by the ball bearing 132 furthest from the ring 140 and, on the other hand , at the front, on the shaft 430, by a washer 434 held in place by a

  circlips 435 engaged in the free end of the shaft 430.

  In general, in FIG. 6, it is possible to produce at least one electrical machine subassembly 2 - flywheel 13 - base 431 which is mounted in one go on the crankshaft. This alternative subset may include

  as mentioned above, the friction clutch 3.

  In all the figures, balancing of the electrical machine 2 - drive wheel 13 assembly can be carried out by removing material, for example on the reaction plate, or on the spacer 130, 131, 46 or on the shaft. 330 or in general, on any other part rotating around the axis XX and integral in rotation with one of the shafts 11 and 12, for example,

  can remove material from the pressure plate 17.

  Of course, the reverse can be done, that is to say adding material to the desired locations on any rotating part around the axis XX is rotationally secured to one of the shafts 11 or 12. It is for example possible , add balancing rivets to the cover 19, to the reaction plate 4,

  on the spacer 130, 131 and 46, on the sleeve 46.

  Balancing is therefore done by adding or removing mass on the flywheel 13 or on the clutch mechanism 17, 18, 22, 19 to correct the unbalance of the heat engine, in particular for

three cylinders.

  In general, it will be noted that the bearing means 132 of FIGS. 2 to 6 are arranged to be brought closer to the center

  of gravity of the rotating parts, that is to say of the assembly 1.

  Thus, in FIG. 6, the bearing means constituted by the two ball bearings are located radially below the rotor 6 and the stator 5, and this, in a generally symmetrical manner

  with respect to the axis of radial symmetry of the rotor and the stator.

  In this figure, these bearing means are located radially

  below the friction face 37 of the reaction plate 4.

  It will be noted that in this FIG. 6, the rotor 6 is fixed at its internal periphery radially below the friction linings. It is the same in the other figures. As a variant, of course, the rotor 6 can be fixed radially at the level of the

  fittings 16, between the inner and outer periphery thereof.

  It suffices in FIG. 2 for example to increase the radial size

from the bottom 130.

  In FIGS. 2 and 3, the bearing means 132 are located radially below the rotor 5 and the stator 6 while being offset axially towards the reaction plate with respect to

  the axis of radial symmetry of the rotor 6 and the stator 5.

  In FIG. 4, the bearing means 132 are always located radially below the rotor 6 and the stator 5 while being offset axially in the direction opposite to the reaction plate 4 relative to the axis of radial symmetry of the rotor 6 and

stator 5.

  It is the same in FIG. 5 in which this offset is more marked, the bearing means 132 being generally offset axially relative to the rotor 6 and this, in the direction opposite to the

reaction plate 4.

  All this depends on the shape of the central recess of the steering wheel

  13 and therefore of the reaction plate 4.

  It will be appreciated that the location of the second guide washer 30 inside the central recess of the reaction plate 4 shifts the center of gravity of the assembly 1 towards the bearing means 132 The hollow shape of the reaction plate 4 is beneficial because the internal periphery of the reaction plate 4 is closer to the rotor 6 than is the friction face 37 of said plate so that one displaces the center of gravity of the assembly in the direction

of the electric machine.

  Of course, it is possible to remove material from the front face of the reaction plate 4 facing the buns 8. It is for this reason that the reaction plate 4 of FIGS. 1 and 4 has a variable thickness at its periphery. external and what

next to the buns 8.

  Thus, the buns penetrate into a notch or obviously the flywheel. Alternatively, provision may be made for

  recesses in the casing 62 of the heat engine.

  Of course, the flywheel 13 can be shaped to identify the speed and or the position of the rotor 6 using one or more sensors. For example, the ring gear 40 can be associated with two sensors, one radial, the other, of axial orientation for

  mark the speed and or the position of the rotor. These sensors can be carried by the bell 14. As a variant, at least

  one of these sensors is carried by the stator 5 or the carrying part 134. One of these sensors, for example of radial orientation, is used for controlling the injection of the internal combustion engine and the other, for example of axial orientation, used to control the electric machine which can be of any type.

  As a variant, the sensor belongs to the bearing means 132.

  These bearing means then advantageously consists of one or more instrumental ball bearings for the formation of a speed of rotation sensor of the drive wheel. The wires of these instrumented ball bearing sensors are then advantageously supported by the load-bearing part 134 to reach

  the connector 63 of the electric machine 2.

  It is therefore advantageous for these sensors to be carried by the

  fixed part of the electric machine 2.

  Of course, depending on the electrical machines, the sensors can also be used for measuring the speed or the

rotor position.

  Of course, provision can be made for cooling

the electric machine 2.

  For example, in FIG. 5, fins 1200 are provided on the front face of the reaction plate 4 and this, opposite the rotor 6. These fins are located above the buns 8, being advantageously inclined in the manner of fan blades. Of course, as a variant, as visible in 1201 in the figure, the fins come from the portion 38. Advantageously, holes are made in the carrier part and in the ring 140 and in the portion 38 of the reaction plate 4 for make a

air circulation.

  As a variant, the shaft carries fins referenced in 1203.

  Of course, the fins can be produced at the periphery

  external 431 of the base 430 as shown in FIG. 6.

  In Figures 2 and 3, the fins could have come from

  from the bottom 130 of the spacer 130, 131.46.

  The fins can be on the machine housing. Cooling, if done by air, can be forced (air back flow from outside into the machine or vice versa) or by

  internal ventilation, or by natural convection.

  Alternatively, as shown in Figures 7 and 8, you can

  cool the stator 8 using a heat transfer fluid.

  Thus, in Figure 7, the sheets 10 of the stator 6 are drilled.

  The package of pierced sheets 10 is then advantageously delimited by two flanges 10a, 10b having a shape allowing the heat transfer fluid to be conveyed from one face to the other

  stator through the holes made in the stator.

  Alternatively as shown in Figure 8, the end flanges are removed and replaced, for example, by

  10c bent overmolded pipes, of aluminum for example.

  Advantageously, the buns are also overmolded by protecting their varnishes by brushing with a charged resin.

heat transfer elements.

  Of course, to control most electric machines, you must index the position of the rotor relative to the

  stator and the position of the sensors relative to the rotor.

  In Figure 9, there is shown the flywheel 13 of Figure 1 which forms a sub-assembly with the machine 2. This sub-assembly is

  delivered as shown in Figure 9.

  When the electric machine 2 works in engine mode, in particular in starter mode as mentioned above, it is necessary to know

  the position and / or speed of the rotor relative to the stator.

  Thus, use is made of a removable plate 3000 carrying at least one rod 3001, projecting axially and penetrating for centering in a hole 3002 produced in the sheet metal package 10 of the stator 6 beyond the buns 8. The plate is fixed on the reaction plate 4 using screws 3003 each screwing into a thread 3004 of the reaction plate 4 and being supported by

  their heads on the back of the 3000 board.

  Thanks to the rod 3001, the stator 6 is indexed in rotation relative to the rotor 5, knowing that the plate 3000 is screwed using screws 3005 into tapped holes 3006 which the spacer has.

  61 carrying, as mentioned above, the packet of sheets 10 of the stator 6.

  In addition, the plate 3000 carries wedges 3007 fixed on the rear face of the plate 3000 using screws 3008. The wedges 3007 pass through a passage 3009 of the plate and a passage 3010 of the reaction plate 4 to come interpose between the internal periphery of the stator 5 and the external periphery of the rotor 6. Thus, the air gap 7 is rigidly maintained while having an indexing of the rotor 6 relative to the stator 5. The air gap

  thus obtained is constant and depends on the thickness of the shims 3007.

  Thus, the sub-assembly is mounted on the casing 62 of the engine block using the screws 45 and the studs 64 replacing the screws 64 of FIG. 1. Then, the screws 3003 and 3005 are unscrewed to

  remove the plate fitted with rod 3001 and wedges 3007.

  Then, the friction disc 20 is housed in the central recess of the reaction plate and finally, the clutch mechanism is fixed on the reaction plate 4. It will be noted that in all the figures, the hub 15 extends in mostly in the central recess 39

of the steering wheel 13.

  After assembly, the plate 3000 with pins 3001 and shims 3007 is recovered by the machine manufacturer. This solution has many advantages, because in addition to the guarantee of constant air gap, it also facilitates the transport of the rotor / stator assembly, thus allowing the delivery of the

machine in one piece.

  As a variant, the use of the plate 3000 is dispensed with by providing a constant air gap by optical setting produced by means of cylinders acting radially, for example on the

  portion 42 of the reaction plate 4.

  It will be noted that in FIG. 9, the reaction plate 4 has an inclined portion 142 connecting the portions 42 and 38 to each other. Thus, the central recess of the flywheel 13 can have any appropriate shape resulting from the different figures. Of course, one can also provide, as shown in FIG. 11, a force sensor 2000, integrated into the declutching device 24 of concentric type, as represented in FIG. 3, or any other elastic element varying continuously in the control. displacement, regardless of the clutch force or

braking.

  Thus, the position of the clutch stop 23 is taken outside of the hydraulic fluid by the transformation of the force information of the preload spring 244 into a

  relative or absolute position information as required.

  Thus, the digital or analog signal delivered by the force sensor 2000 is processed by a computer, external or internal to said sensor, to determine the relative position or

  clutch clutch 23.

  Thus, this force sensor 2000, associated with the preload spring independent of the clutch or braking force, makes it possible to distinguish, as shown in FIG. 11, the two

  positions B and C that the clutch bearing 23 can take.

  It can be seen in FIG. 11 that this force sensor 2000 makes it possible to easily distinguish the two points B and C which represent the same clutch or braking force represented by point A in FIG. 11 in which one has represented on the ordinate the clutch or braking forces and the displacements on the abscissa. This characteristic curve is due here to the curve

  well-known characteristic of the diaphragm.

  Advantageously, the position sensor 2000 is placed directly under the preload spring 244, that is to say between the rear end of the preload spring 244 and the body.

exterior 242.

  Advantageously, an intermediate shim, not shown in FIG. 10, will be placed between the force sensor 2000 and the preload spring 244. This shim can be formed by the protective bellows

245 which is thus immobilized.

  Of course, the present invention is not limited to the embodiments described, in particular, the support 21 can be in one piece with the first of the guide washer 29. A single guide washer can be provided as disclosed in document FR-A2390617. In all cases, the hub 14 largely penetrates into the recess 39 and extends asymmetrically relative to the support 21 of the linings 16. The torsion damper 20a thus extends mainly to

inside the recess 39.

  In general, the support 21 is coupled elastically to the hub 15 by a torsion damper 20a penetrating into the central recess 39 of the flywheel 13 and therefore of the reaction plate 4 for reduction of the axial size of the sub- together 1. Thus, the elastic members 4 can consist of spiral springs acting between the support and the hub. The elastic members may consist of blades or blocks of elastomeric material interposed in this case, between the hub and

  a ferrule secured to the support 21.

  Of course, we can reverse the structures. Thus, in Figure 12, the base 431 can be replaced by a flange 431a having at its outer periphery the sleeve 46 and the shoulder

  48. This flange is crossed by the screws 345 as in FIG. 6.

  In this case, part 134 is close to reaction plate 4. We have

  therefore reversed the direction of the supporting part 134.

  Here the shaft 430a is frustoconical and the flange 431a has centrally a hub 431b with internal bore of frustoconical shape for mounting in a complementary manner on the frustoconical outer periphery of the shaft 430a. A 431c nut, mounted on the end

  of the shaft 430 a makes it possible to lock the complementary cones.

  The flange 431a is thus linked in rotation to the shaft 430a.

  We see in light of this description that Exhibit 134 of

  Figure 12 can be replaced by a veil from the sleeve

431b, for example, by molding.

  The sleeve 46 can be separate from the flange 431a and be secured to the motor housing 62, the bearing means 132 being

  of course deleted, as well as the spacer 61.

  Thus the veil would carry the rotor while the sleeve 48

  would carry the stator so that the rotor would surround the stator.

  Thus, the rotor can extend radially beyond the friction linings 16 without increasing the radial size. Of course, it is possible to keep the supporting part 134 of the stator and the bearing means 132, the said supporting part then being adjacent to the internal combustion engine, the rotor being raised in elevation by the web. This veil is then installed axially between the reaction plate 4 and the load-bearing part. It advantageously has a sinuous shape and has at its outer periphery a shouldered sleeve 46. Advantageously, the veil is

rib.

  We can do the same in Figures 2 and 3, the carrier part being replaced by a veil while the sleeve 46 would be fixed to the motor housing 62, the spacer 61 being removed. The rotor can thus be carried by a veil secured to the flywheel to surround the stator ,. Said veil being

  generally C-shaped like that of FIGS. 2 and 3.

  In these Figures 2 and 3, the carrier piece 134 is locally deformed by stamping to create a clearance for

updos 8.

  Thus, release means are provided for the buns and consist either of a reduction in thickness of the tray.

  reaction 4 or in deformations of the supporting part 134.

  Alternatively, you can create a groove in the tray

  reaction to achieve clearance for buns 8.

  Likewise, cooling means are provided to cool the machine. The cooling means can be carried by the stator 5 figures 7 and 8, or by the flywheel by means

  fins 1200, 1201 of FIG. 5.

  Alternatively, the support piece or the veil acts as a heat shield. Note that the arrangements of Figures 2, 3 and 12 are advantageous, since the flow of heat by conduction from the reaction plate 4 to the sleeve 46 follows a long path which is

  advantageous for the electric machine 2.

  Likewise, the conduction heat flow path between the reaction plate 4 and the stator 5 is very long, taking into account the configuration of the carrier part (FIGS. 4, 5, 6 and 12). The through holes 545 further improve cooling.

Claims (57)

  1. Friction clutch device comprising, on the one hand, a rotational drive wheel (13) having a front end intended to be fixed to a driving shaft (11) and a rear end in the form of a reaction plate (4) of hollow form with a central recess (39) delimited externally by a friction face (37), and on the other hand, a friction disc (20), comprising at its external periphery at least one friction lining ( 16) for contact with the friction face (37) of the reaction plate (4), said friction lining (16) being integral with a support (21) coupled in an elastic manner by means of a torsion damper (20a) to a central hub (15) intended to be secured in rotation to a driven shaft characterized in that the torsion damper (20a) penetrates into the central recess (39) of the reaction plate (4) and in what the drive wheel (13) carries between its front ends and rear the rotor (6) of a rotary electric machine (2) comprising a fixed stator (5) 2. Device according to claim 1 characterized in that the torsion damper (20a) comprises, on the one hand, a first guide washer (29) integral with the support (21) and a second guide washer (30 ), and, on the other hand, a web (34) disposed between the two guide washers (29,30) and linked in rotation, possibly after taking up a clearance, with the hub (15) and in that the second guide washer (30) is located in the central recess (39) of the reaction plate (4). 3. Device according to claim 1 or 2 characterized in that the torsion damper (20a) is located radially under a first annular portion (38) of axial orientation   connecting to the internal periphery of the friction face (37).   4. Device according to claim 3 characterized in that the first portion (38) is extended inward by a inclined portion (142).   5. Device according to claim 4 characterized in that the inclined portion is extended by a ring (130) transverse orientation.   6. Device according to claim 3 characterized in that the first portion (38) is connected to an orientation ring transverse (130).   7. Device according to claim 3 characterized in that   the recess (39) is in the form of a stair step.   8. Device according to any one of claims 1 to 7   characterized in that the drive wheel (13) is one   holding with the reaction plate (4).   9. Device according to any one of claims 1 to 7   characterized in that the drive wheel (13) is at least in two parts, namely, a first part constituted by the reaction plate (4) and a second part (130, 131, 46), integral in rotation with the first part and intended to be fixed on the driving shaft (12).   10. Device according to claim 9 characterized in that the second part (130, 131, 46, 230) consists of a spacer intended to be interposed between the driving shaft and the reaction plate. 11. Device according to claim 10 characterized in that the spacer (130, 131, 46) has in cross section generally the shape of a U with an upper branch (46) of axial orientation, generally in the form of a shoulder sleeve end (48) for fixing the rotor (6) of the electric machine (2), and an annular lower branch (131) of axial orientation for fixing the reaction plate (4).   12. Device according to claim 10 characterized in that   that the spacer (230) consists of a tree.   13. Device according to claim 9 characterized in that the second part consists of a splined shaft at its end   rear for rotational connection with the reaction plate (4).   14. Device according to claim 9 characterized in that the second part consists of an internally fluted base for rotational connection with a central shaft (430) from the reaction plate (4).   15. Device according to claim 9 characterized in that the second part consists of a flange (431a) linked in rotation   with a central shaft (430a) from the reaction plate (4).   16. Device according to claim 15 characterized in that the flange (431a) has a central hub (431b) with an internal bore of frustoconical shape for mounting on the periphery   external of the tree (430a) of frustoconical shape.   17. Device according to claim 15 or 16 characterized in that the flange (431a) carries at its outer periphery a sleeve with end shoulder (48) for fixing the rotor (6) of the electric machine (2).   18. Device according to any one of claims 1 to   17 characterized in that the drive wheel (13) carries bearing means (132) interposed radially between said flywheel (13) and a carrier part (134) integral with the stator (5) for definition of a precise air gap between the stator (5) and the rotor (6). 19. Device according to claim 18 characterized in that the bearing means (132) are located radially above the fastening members (145) of the flywheel (13) to the driving shaft (11).   20. Device according to claim 19 characterized in that the bearing means (132) are carried at their internal periphery by a spacer (130, 46, 131) belonging to the flywheel (13) and integral with the reaction plate (4) for forming a spacer between the reaction plate (4) and the driving shaft (11). 21. Device according to claim 19 characterized in that the bearing means (132) are carried at their outer periphery by a sleeve (46) secured to the reaction plate (4) and at their inner periphery by a skirt (133) secured a supporting part (134) carrying the stator at its outer periphery (5).   22. Device according to claim 18 characterized in that the bearing means (132) are located on the same circumference as the fixing members (245) of the steering wheel   drive (13) to the drive shaft (11).   23. Device according to claim 18 characterized in that the bearing means (132) are located radially below the fixing members (345) of the drive wheel (13) to the driving shaft (11).   24. Device according to claim 23 characterized in that the carrier part is provided with through holes (545) for the passage of at least one tool for screwing the fixing members (345) consisting of screws.   25. Device according to claim 24 characterized in that the reaction plate (4) has through holes in axial coincidence with the through holes (545) of the part carrier.   26. Device according to any one of claims 18 to   characterized in that the load-bearing part (134) is integral with a spacer (61) and internally carries elastic means (462, 463) which can be deformed for passage of fixing members (64) and flexible mounting of the load-bearing part (134 ) on the   engine block (62) of the internal combustion engine.   27. Device according to any one of claims 1 to   17 characterized in that the flywheel (13) carries release means for updos (8) which have an axial projection   the stator (5) of the electric machine (2).   28. Device according to claim 27 characterized in that the release means consist of a reduction in thickness that has the reaction plate (4) at its outer periphery.   29. Device according to claim 28 characterized in that the release means consist of a groove that has   the reaction plate (4) at its outer periphery.   30. Device according to any one of claims 18 to   26 characterized in that the carrier part (134) has release means for buns (8) which have projecting   axial stator (5) of the electric machine (2).   31. Device according to claim 30 characterized in that the release means consist of a local deformation of the supporting part (134).   32. Device according to any one of claims 1 to   30 characterized in that the flywheel (31) carries means for   cooling for cooling the electric machine.   33. Device according to claim 32 characterized in that the cooling means consist of fins   (1200, 1201) carried by the reaction plate (4).   34. Device according to any one of claims 1 to   33 characterized in that the stator (5) of the electric machine   (2) carries cooling means.   35. Device according to claim 34 characterized in that the cooling means consist of holes made in the sheet pack (10) that has the stator (5) said holes for conveying a heat transfer fluid from one side to the other.   36.A device according to claim 35 characterized in that bent pipes are introduced into said holes.   37. Device according to any one of claims 1 to   characterized in that the reaction plate has at its outer periphery an annular skirt (144) surrounding the one or more   friction linings (16) of the friction disc (20).   38.A device according to claim 37 characterized in that the annular skirt (144) has at its internal periphery a groove   (148) to collect the dust.   39.A device according to claim 38 characterized in that the groove is delimited by the friction face of the plate reaction (4).   40. Device according to any one of claims 19,   and 23 to 26 characterized in that the carrier part (134) is interposed between the reaction plate (4) and the stator (5) and the rotor (6) so that it acts as a heat shield and dust covers.   41. Device according to any one of claims 21 to   characterized in that the reaction plate (4) has a   sleeve (46) carrying the rotor (6) of the electric machine (2).   42. Device according to any one of claims 1 to   41 characterized in that the drive wheel (13) has locally removed material (1000) for balancing   dynamics of the friction clutch device.   43. Device according to claim 42 characterized in that the removal of material (1000) is carried out at the external periphery of the reaction plate.   44. Device according to any one of claims 1 to   41 characterized in that the drive wheel (13) locally provides material for dynamic balancing of the friction clutch device.   45. Device according to any one of claims 1 to   8 characterized in that the reaction plate (4) has internal threads for mounting a removable plate (3000) provided with at least one rod (3001) penetrating for centering in a hole (3002)   produced in a pack of sheets (10) presented by the stator (5).   46.A device according to claim 45 characterized in that the plate (3000) carries shims (3007) intended to be interposed between the stator (5) and the rotor (6) for definition an air gap (7).   47.A device according to claim 45 or 46 characterized in that the plate (3000) carries screws for its screwing on the stator (5).   48. Device according to any one of claims 1 to   47 characterized in that the reaction plate (4) has at its external periphery a toothed ring intended to be associated with at least one sensor.   48. Device according to any one of claims 18 to   characterized in that the bearing means (132) consist of   an instrumented ball bearing for forming a sensor.   49. Device according to any one of claims 1 to   48 characterized in that the hub (15) does not penetrate   symmetrical in the central recess of the reaction plate (4).   50.A device according to claim 49 and 2 characterized in that the support (21) is attached to the first washer of guide (29).   51.A device according to claim 49 and 2 characterized in that the support (21) is in one piece with the washer guide (29).   52. Device according to any one of claims 1 to   51 characterized in that the reaction plate (4) carries a cover (19) on which is pivotally mounted a diaphragm (18,22) bearing on the cover (19) for action on a reaction plate (17) and tightening the friction lining (16) between the pressure plates (17) and the reaction plate (4), said pressure plate being rotationally integral with said cover (19) while being able to move axially with respect to it.   53.A device according to claim 52 characterized in that a clutch release bearing (23) is intended to act on the internal ends of the fingers (22) which the diaphragm has centrally and in that the clutch release bearing belongs to a   declutching device (24) of the concentric type.   54.A device according to claim 53 characterized in that the declutching device (24) of the concentric type comprises a piston (241) movably mounted inside a blind annular cavity (243) of axial orientation for formation of a variable volume chamber and in that the piston (241) carries the stop of release (23).   55.A device according to claim 54 characterized in that the blind annular cavity (243) is delimited by an external body (242), in that a preload spring (244) acts between the external body (242) and the stop clutch (23) and in that a force sensor (2000) is associated with the spring of preload (244).   56.A device according to claim 55 characterized in that the position sensor is placed between the preload spring (244) and the external body (242)   57. Device according to any one of claims 53 to   56 characterized in that the concentric type release device is operated by an electric motor actuator connected to a computer receiving information from sensors detecting the speed of rotation of the driving shaft (11) and the driven shaft ( 12) and in that the speed sensor of the driving shaft is used to detect the speed of   rotation of the rotor (6) of the electric machine.