Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D13/00—Friction clutches
  • F16D13/58—Details
  • F16D13/60—Clutching elements
  • F16D13/64—Clutch-plates; Clutch-lamellae
• • 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
  • F16D13/00—Friction clutches
  • F16D13/58—Details
  • F16D13/60—Clutching elements
  • F16D13/64—Clutch-plates; Clutch-lamellae
  • F16D2013/642—Clutch-plates; Clutch-lamellae with resilient attachment of frictions rings or linings to their supporting discs or plates for allowing limited axial displacement of these rings or linings

Definitions

• the present invention relates to a lining carrier disc for supporting friction linings, suitable for constituting a friction disc, in particular for a motor vehicle, of the type comprising a central part and a peripheral part divided into radial blades suitable for receiving the friction linings, each of said blades being connected in one piece to said central part by a foot and comprising at least one bearing zone generally parallel to the mean plane of said central part, for contact with at least one of said linings friction and fixing thereof.
• these linings extend on either side of the peripheral part.
• Friction discs are sometimes subject, in operation, to unpleasant vibrations constituting what is customary to designate by chatter. This chatter can occur both at low torque, during a parking maneuver, and at high torque when changing gears on the road.
• the bearing zones sometimes have an extent not as large as desired, which leads to an incrustation phenomenon, the friction linings sagging inside the recesses existing between two bearing surfaces of the same blade. This results in a lack of flexibility which at maximum load is responsible at least in part for browsing.
• the central zone is offset axially with respect to the peripheral bearing zones and to the central part.
• these blades alternate circumferently with a series of tongues.
• the tripod blades by their central zone, are used to fix one of the friction linings, in this case that associated with the clutch pressure plate, while the tabs are used to fix the other lining. friction, in this case that associated with the clutch reaction plate. Thanks to this arrangement, the tongues have sufficient elasticity to follow the cone movement of the reaction plate, the tripod blades follow the cone movement of the pressure plate and have a large circumferential length with large contact surfaces.
• the friction lining, optionally split, associated with the pressure plate is well supported since it finds a reaction on the other friction lining by through its peripheral range areas.
• the object of the present invention is to overcome these drawbacks.
• a lining carrier disc of the above-mentioned type is characterized in that at least some of said tongues have, by virtue of a connection ply, at least one additional bearing zone offset axially in the direction of the central area of the tripod blades.
• the friction lining associated with the tongues finds a reaction due to the new bearing zone, forming stabilization zone, which is capable of coming into abutment against the other friction lining.
• the incrustation phenomena are thus reduced, the wear of the lining of the tongues being better distributed.
• the additional bearing zone can be produced at the free end of the tongue, that is to say at the external periphery of the latter.
• the tongue may be like the tripod blade and include two additional peripheral bearing zones. Thanks to all these provisions, it is possible to use, because of the additional support according to the invention, a fixing of the friction linings by gluing on at least some of the tripod blades.
• the friction linings concerned are then fixed directly only by bonding to all the central areas of said blades.
• the inertia of the packing disc can be further reduced and it can rotate further at higher rotational speeds.
• the friction lining concerned then has just the useful thickness, because there is no additional thickness to be provided as in the case of riveting.
• the riveting holes are eliminated, which increases the resistance of the friction disc and reduces the incipient fractures.
• the central zone of the tripod blade can be extended radially inwards by means of a cut affecting the longitudinal fold, which makes it possible to further increase the range of range and attachment offered to the trim.
• the other seal can be fixed to the radial tabs by riveting, but of course to further reduce the inertia of the friction disc can also be fixed by gluing the other friction lining on said tabs.
• the friction lining can be fixed using two rows of rivets, one of which is installed in favor of said extension as described in the sub-mentioned document EP-A-0 579 554. It is also possible to provide two rows of rivets at the level of the tongues.
• the tongues have a free end which is circumferentially narrowed and which carries the additional bearing zone. This makes it possible to give good flexibility to the additional bearing zones of the tongues, while having the possibility of widening circumferentially the peripheral areas of reach of the tripod blades.
• the tongues have a tapered shape in the direction of their external periphery, so that the rooting zone with the central part of the lining carrier disc is increased, which increases the robustness of said disc. This also makes it possible to reduce the stiffness of the additional bearing zone of the tongue.
• FIG. 1 is an axial sectional view of a friction disc fitted with a packing disc according to the invention
• - Figure 2 is a partial elevation view of said lining carrier disc with hatching of the bearing areas
• Figure 3 is an enlarged sectional view along line 3-3 of Figure 2
• - Figure 4 is an enlarged sectional view along line 4-4 of Figure 2.
• FIGS 5 to 10,12 are views similar to Figure 4 for other embodiments.
• FIG. 11 is a sectional view along line 11, 11 of FIG. 10.
• FIG. 13 is a sectional view along line 13, 13 of FIG. 12.
• a lining carrier disc suitable for constituting a friction disc for a motor vehicle.
• This disc comprises a central part 16 and in one piece a peripheral part divided into radial blades 672 alternating circumferently, here regularly, with a series of radial tongues 671 in the plane of the central part 16 of the lining carrier disc.
• each blade is connected to the central part 16 by a longitudinal foot 480 and has a central zone of range 423 and two peripheral zones of range 422.
• the central zone 423 is offset axially with respect to the central part and to the peripheral bearing zones, here in the plane of said central part.
• the central zone 423 of large extent, is used for fixing a friction lining 132, while the tongues 671 are used for fixing another friction lining 131.
• the tongues 671 and the central zones 423 of the blades 672 here have holes 19, distributed over the same circumference, for fixing said linings 131, 132 to the lining carrier disc here by means of rivets 47 (FIG. 1).
• the holes 19 are not distributed over the same circumference to form a polarizing device.
• the lining carrier disc with its linings 131, 132 belongs to a friction disc comprising two coaxial parts mounted movable relative to one another against elastic circumferential action members 5 and friction means. 20 with axial action.
• these means include trapezoidal teeth formed at the outer periphery of the hub 3 and at the inner periphery of the web 4, said teeth meshing with play.
• the structures can be inverted, the lining carrier disc then being integral with the web 4 movable in rotation relative to the hub 3, while the guide washers are then integral with the hub 3.
• the lining carrier disc may be integral with the web 4, itself integral with the hub 3, the friction disc then being of the rigid type.
• the lining-carrying disc is joined by its central part 16 to the guide washer 1 and is joined thereto by means of small columns passing through openings 7 made in the web 4.
• balusters 8 secure the washers 1,2 arranged on either side of the web 4 to one another.
• the elastic members 5 here consist of coil springs mounted here in pairs in facing windows made in the guide washers 1,2 and in the web 4 in a manner known per se.
• the friction means 20 comprise a friction washer interposed axially between the web 4 and the washer 1, as well as an application washer locked in rotation on the guide washer 2 using axial tabs engaged in openings of said washer 2.
• a spring bears on the washer 2 and urges the application washer into contact with the web 4.
• the liner carrier disc is equipped with two annular friction linings 131, 132 mounted back-to-back, on either side of the central part 16.
• friction linings are here of the organic type being circumferentially continuous and i:
• the linings 131, 132 are normally clamped between the pressure and reaction plates (not visible) of the clutch integral in rotation with the crankshaft of the internal combustion engine of the motor vehicle, while the hub 3, thanks to its bore internal grooved, is linked in rotation with the input shaft of the gearbox.
• the friction linings 131, 132 are released so that in the disengaged clutch position, these are not in contact with said pressure and reaction plates.
• This progressive tightening is mainly due here to the tripod blades 672 and more particularly thanks to their flexible peripheral zones of range 422.
• These blades 672 have a tripod shape with three flat areas of range 422 and 423 respectively.
• the central planar zone 423 is in contact with the friction lining 132 associated with the pressure plate and is used for fixing said lining 132.
• This zone 423 narrows in the direction of the outer periphery of the lining disk. It is therefore wider at its internal periphery.
• the zones 422 extend at the outer periphery of the blades 672 on either side of the central zone 423. They have a generally triangular shape and are connected to the zone 423 by oblique folds 421, here symmetrical with respect to the 'radial axis of symmetry of the blade 672. These folds 421 therefore extend obliquely to said radial axis and allow an axial offset between the zones 422,423.
• the zones 422 and 423 are offset axially by being parallel to each other. More specifically, the zones 422 are suitable for coming into contact with the friction lining 131 associated with the reaction plate of the clutch. Here they extend in the plane of the central part 16.
• the central zone 423 is connected to the central part 16 by a fold of tangential orientation 480 or longitudinal fold perpendicular here to the axis of radial symmetry of the blade.
• the fold 480 here extends symmetrically with respect to said radial axis of symmetry of the blade. This oblique fold 480 forms the foot of the blade and allows an axial offset of the zone 423 relative to the central part 16.
• the blades 672 have a large circumferential extent and are separated here from each other by an angle of 45 °, an angle of 22 °, 30 'existing here between the axis of symmetry of a blade 672 and the axis of symmetry of a tongue 671 and therefore between two holes 19.
• a blade 672 is therefore regularly framed by two tongues 671, the holes 19 being regularly distributed circularly.
• the tongues 671 therefore have here a small circumferential extent by being flexible and long radially.
• a lining carrier disc of the above-mentioned type is characterized in that at least some of said tongues 671 have, thanks to a connection ply 621, at least one additional bearing zone 622 offset axially in direction of the central zone 423 of the tripod blades. So when the linings are crushed
• said zone 622 is suitable for coming into contact with the lining 132 so as to offer a reaction.
• This zone 622 therefore constitutes a stabilization zone extending here in the plane of the central zone 423 by virtue of the oblique fold 621 of radial orientation.
• the zone 622 can be slightly set back with respect to the zone 423.
• the lining 131 remains very flat.
• the additional range area is made at the free end of the tongue 671, that is to say at the outer periphery thereof.
• the tongue 671 has a tapered shape, its rooting zone with the central part 16 being wider than its external periphery constituted by the abovementioned bearing zone 622, the external periphery of which is situated on the same circumference as that of the blades 672.
• the tongue 671 has in one piece a main part 623 of the range and fixing of the lining 131 thanks to the holes 19, a radial connection ply 621 and the range of the area 622.
• the height of the fold 621 is greater than the height of the span 622.
• the free end 622, 621 of the tongue 671 is narrowed circumferently, which makes it possible to give even more flexibility to the bearing 622, which extends circumferently between two zones 422 at the external periphery of the disc. This also makes it possible to increase the range of the peripheral zones 422.
• a lining carrier disc is obtained with at its outer periphery large bearing zones reducing the phenomena of incrustation and chattering because the friction linings 131, 32 remain in a well parallel plane.
• the lining disc and therefore the friction disc can thus rotate at high speed while following the conical movement of the pressure plates and reaction.
• the wear on the linings is evenly distributed.
• the folds 480 and 621 give good stability to the lining carrier disc, which allows good contact of the friction linings with the pressure and reaction plates, which reduces the wear of the friction linings.
• range area 622 is of lesser height than that of the peripheral ranges 422.
• the height of the fold 621 and of the area 622 being generally equal to that of the oblique area 422.
• an additional support point is sought here and flexibility so that zone 622 constitutes a stabilization zone.
• the stiffness of the zone 622 can be modified in a simple manner by decreasing or increasing the length of the fold 621, so that the outer periphery of the tongues can extend over a circumference of diameter less than or greater than that of the circumference. of the outer periphery of the blades 672.
• the present invention is not limited to the embodiment described.
• the tripod blades can have another shape such as those described in the aforementioned document EP-A-0 579 554.
• the tripod blade 971 has a central zone of range 922, narrowed at its external periphery and offset axially relative to the central part 16 in favor of the oblique folds 921 relative to the axis of radial symmetry of the blade and the longitudinal fold 924 perpendicular to said axis of symmetry.
• the central zone 922 is extended centrally, radially inwardly thanks to a central U-shaped cutout 926 affecting the longidudinal fold 924.
• This extension is generally in the form of a tongue with legs 925 with a zone of rooting in the central zone 922 narrowed, the vertical ends of the cutout 926 emerging in circular holes.
• the tab 925 is therefore directed towards the axis of the assembly and has a rounded free end.
• the peripheral bearing zones 923 are generally in the plane of the part 16. These zones 923 project circumferentially from the central zone 922, so that the blades 971 are generally in the form of a T.
• radial tabs 972 and 973 have a different configuration. These tongues alternate circumferently with the blades 971, and this in a regular manner. The free end of the tongue
• the tongue 973 has at its free end a zone 932 connected by a fold 931 to the main zone of the tongue 973.
• the fold 931 and the zone 932 here in the plane of the central zone 922, have a trapezoidal shape.
• the folds 941 and 931 have a lower height than the fold 621 of FIG. 2.
• the central part 16 has through holes 119 for fixing the central part 16 to the guide washer 1 or to the web 4 as appropriate.
• cutout 926 centrally affects the fold 924 which is thus split which improves the progressive tightening of the blade 971. This fold has good mechanical strength despite the cutout.
• linings 131 and 132 are fixed directly by gluing on the main part of the tongues 972,973 and on the central zones 922 of the blades 971. It will be noted that the extension 925 promotes bonding.
• the thickness of the linings 131,132 can be reduced.
• the said linings 131, 132 have just the required thickness, because there is no need to provide extra thickness for the rivets 47 as in the embodiment of FIGS. 1 to 4.
• the blades and the tongues are stiffened, since they do not have holes for the passage of the rivets.
• this additional zone is carried out by means of a cutout 946, generally in the shape of a V, directed radially outwards, unlike the cutout 926.
• each tongue 1072 and each tripod blade 1071 has two holes 19 for the passage of the fastening members of the linings 131, 132.
• These holes 19 are radially aligned on the axis of radial symmetry of the radial tongues 1072 and of the blades 1071.
• One of the holes 19 is installed in the area of the extension 1025 of the central area delimited by a cutout 1026 in a U shape centrally affecting the longitudinal fold 1024 of the blade 1071.
• the extension 1025 in the form of a tongue or tab, is in the plane of the central zone of range 1022 of the blade 1071, the zone 1022 being offset axially with respect to the central zone 16 by virtue of the fold 1024 and the folds 1021 oblique with respect to the axis of radial symmetry of blade 1071.
• the folds 1021 are connected to the peripheral bearing zones 1023 generally parallel to the folds 1021.
• the zones 1023 are generally in the planes of the zone 16.
• the tabs 1072 have a shape similar to the blades 1071 with the only difference that their main part is in the plane of the central zone 16.
• the radial tabs 1072 therefore have at their external periphery two additional peripheral bearing zones 1122, generally in the plane of the central zone 1022 of the blades 1071.
• These zones 1122 are connected by folds 1121 oblique to the axis of radial symmetry of the tongue 1072 to the main area of said tongue.
• the blades 1071 have a bulge at their outer periphery and the tongues 1072 are widened circumferentially at their outer periphery.
• the tongues and the tripod blades can be distinct from one another by being attached, for example, by holes 229 to the washer 1 or to the web 4.
• the tripod blades 772 alternate circumferentially with the radial tongues 771 having a shape similar to those of the blades 772, as explained in FIG. 6.
• tongue 771 has in its central part an additional bearing area 1125.
• This zone 1125 is in the plane of the central zone of the blade 772 and is connected by a fold 1124 of the main part 1128 of the tongue 771.
• the fold 1124 with the tapered bearing region 1125 generally forms a tongue or tab directed towards the axis of the assembly, unlike the embodiment of FIG. 5.
• the tongue 772 is extended radially beyond its longitudinal fold towards the axis of the assembly for its fixing to the washer, by means of holes 229 allowing the passage of the fixing members.
• Figure 8 tab 771 and the blade
• each blade 771 is in one piece with a strip of material 116 generally in the form of an annular sector.
• the strip 116 connects a blade 771 to a tongue
• the blades 772 and the tongues 771 are in the image of one another, because their central zone has a tab 1025, 1124, 1125 generally in the form of V directed towards the axis of
• the tab 1025 affects the longitudinal fold of the tongue 772 as explained above.
• the central part can be divided into strips 226 with ears at each of their circumferential ends.
• the ears are provided with holes 229 and overlap with a tongue on a consecutive blade 772.
• the strips 226 are fixed here to the washer 1 by riveting in favor of the holes 229.
• tongues 1372 and 1373 are distinct from each other, the tongue 1373, of shape similar to the tongue 671 of FIG. 2, being narrowed at its outer periphery, so that the tripod blade 1371 is asymmetrical , the peripheral carrying zone 1324 then having a greater range than the other peripheral carrying zone adjacent to the tongue 1372.
• the bearing zones 1425 extend in the plane of the central zone 1422. More precisely, the central zone 1422 is connected by an oblique fold 1421 to a peripheral bearing zone 1423 in the plane of the main part of the tongue 1472.
• This zone 1423 is connected by an oblique fold
• This zone 1425 is in the plane of the additional zone 622 of the tongue 1472.
• This tongue 1472 also has, as in FIGS. 7 to 9, an additional bearing area 1427 connected by a fold 1426 to the main part of the tongue 671.
• the friction linings 131,132 can be fixed by gluing to the tongues and to the blades 771,772.
• each lining may include a continuous and perforated support ring for fixing friction pads as described in the above-mentioned document EP-A-0 579 554.
• the tangential folds 480 may not by themselves constitute the foot of the blades, an end of the feet connecting the folds to the central part of the disc. As shown in dotted lines in FIG. 2, the folds 621 and the zones 622 are not necessarily symmetrical and there may be alternation from one tongue to the other of the asymmetry.
• the oblique folds connecting the areas of peripheral devices to the central area may not be symmetrical with respect to one axis of radial symmetry of the blade. The same is true of the central area.
• the additional bearing zones are not necessarily arranged on the axis of radial symmetry of the tongue. A slight lag may exist. Of course, it is possible, for example, to replace the tabs 1025 of the blades 772 with the tabs 1125, 1124 of FIG. 7 for the formation of an additional support zone offset towards the tongue 771.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanical Operated Clutches (AREA)
• Braking Arrangements (AREA)

Priority Applications (22)

Applications Claiming Priority (10)

Publications (1)

Family

ID=27514095

Family Applications (1)

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Cited By (3)

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Citations (6)

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• 1994
  • 1994-03-18 DE DE69405064T patent/DE69405064T2/de not_active Expired - Lifetime
  • 1994-03-18 WO PCT/FR1994/000297 patent/WO1994021934A1/fr active IP Right Grant
  • 1994-03-18 AU AU62852/94A patent/AU6285294A/en not_active Abandoned
  • 1994-03-18 US US08/335,890 patent/US5522490A/en not_active Expired - Fee Related
  • 1994-03-18 ES ES94910436T patent/ES2108438T3/es not_active Expired - Lifetime
  • 1994-03-18 EP EP94910436A patent/EP0641419B1/fr not_active Expired - Lifetime
  • 1994-03-18 JP JP52071894A patent/JP3510255B2/ja not_active Expired - Fee Related
  • 1994-03-18 CN CN94190126A patent/CN1053730C/zh not_active Expired - Fee Related

Patent Citations (6)

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