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
• • 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 dry clutch friction disc, in particular for a motor vehicle.
• a clutch friction disk is intended to be mounted on a shaft said led being inserted between a reaction plate and a pressure plate of a clutch integral in rotation with a shaft said to drive. During a clutch operation, said pressure plate clamps the friction disk against said reaction plate.
• a progressive clutch friction disk as for example represented in FIGS. 7 and 8 of patent FR 1 304 067, comprises a substantially flat ring-shaped metal support, commonly referred to as "the web", the outer periphery of which is fragmented by so as to have fins attached to, or reported on, said ring.
• These fins are alternately folded so as to include staggered portions, on either side of a mean plane, capable of being deformed elastically under the effect of a clamping force.
• a crown-shaped friction liner is attached to each side of said support by being secured by any suitable means to some of said offset portions. During tightening, the fins deform elastically, the offset portions coming closer to each other.
• said fins have cutouts and openings.
• Another proposal as described in the patent application FR 2 817 002 of the applicant, consists in alternating between the web and the liners, at least one of the liners having areas of reduced thickness,
• the object of the present invention is to overcome the above drawbacks and to provide a friction disc with low addition of inertia and resistant to incrustation phenomena.
• This object is achieved by a dry clutch friction disc comprising a web, at least one friction lining and an intermediate part, said intermediate part comprising a ring from which tabs extend radially outwards, the web comprising progressivity zones, the lugs of the radially extending intermediate part being arranged axially facing said progressivity zones, a lug systematically interposing between the web and the (or) lining (s).
• all areas of the web which are in contact with a lining are by means of tabs, that is to say by indirect contact veil - lug - lining, no direct contact being possible. possible between the veil and the (or) fittings.
• An intermediate piece according to the invention is advantageously arranged in a clutch disk so that the radially extending lugs are disposed in contact with all the areas of the friction linings where the risk of incrustation is greatest. These zones correspond in particular to the areas where the pressure exerted by the web on the lining is highest during the coupling phases of the friction disk against the reaction plate.
• the inventors have further found that the presence of free space between the tabs of the insert is particularly advantageous. They have noticed that under the pressure of the areas where the pressure is highest, the material of the friction lining can flow.
• the insert is formed from a sheet. This sheet is generally thin.
• the friction pad (s) and the part interlayer above are generally assembled by gluing.
• the (or) friction lining (s) and the insert part are substantially radially in internal and external circles of the same diameters.
• the zones of progressivity comprise fins capable of axial elastic deformations
• the invention also relates to a method of manufacturing a dry clutch friction disk according to the invention, as described above and comprising a web with progressivity zones, at least one friction lining and an intermediate piece where the following components are supplied: the web, the friction lining (s), the intermediate part (s);
• the friction lining and the intermediate part are preassembled in the form of a friction member.
• the mounting of the friction disk is then facilitated.
• the components are assembled by rivets only one of which end is supported on counter faces of the (the) friction linings. It is thus possible to avoid the use of glue in the assembly and to obtain an advantageous disk in terms of cost.
• facing surfaces of the friction lining means surfaces adapted to receive a rivet head, including substantially flat or conical surfaces, in contact with which one can have a rivet head, in particular respectively flat or conical.
• These countersink surfaces are obtained by milling the lining so as to create a bore with a small diameter portion in which the rivet body can move and a larger diameter portion of which one end comprises the countersink surface to receive the rivet head. The larger diameter portion is milled so that the rivet head is embedded in the packing when new. After crimping the rivet, most of the countersink surface is in contact with most of the bearing surface of the rivet head.
• Figure 1 schematic drawing of a friction disc
• FIG. 3a schematic sectional view along A-A of components before mounting a friction disc according to the invention
• axial is understood to mean a direction parallel to this axis of rotation and “radial” is understood to mean a direction perpendicular to this axis and passing through this axis.
• inside an area close to this axis of rotation and "outside”, an area away radially from this axis of rotation.
• FIG. 1 represents a schematic front view a friction disk 1 comprising a hub 5 capable of being secured to a driven shaft, a friction lining 3 and dashed a web 2.
• Elastic means, including springs 4 are arranged to allow the damping and / or vibration filtration of the shaft leading to the driven shaft.
• FIG. 2 shows a view of the intermediate part 6.
• This part comprises a ring 61 of inner radius close to the inside radius of the friction lining 3.
• Tabs 62, 63 extend radially outwardly from this ring 61. These lugs 62, 63 preferably extend to a limit constituted by the outer radius of the friction lining 3.
• the radial width of the ring 61 is less than or equal to 20% of the total radial width of the intermediate part 6, considered between the inner radius of this part and the radial extension of the outermost legs.
• the zones of the tabs 62, 63 connected to the ring 61 occupy circumferentially less than 50% of the outer circumference of said ring 61.
• the tabs 62, 63 shown are substantially rectangular. They could also have a flared shape, for example wider outward than inward.
• the tabs 62 comprise openings 64 capable of passing a rivet body but not its head.
• the legs 63 are full.
• Figure 3 shows a section along AA of Figure 1, a friction disc according to the invention, wherein the components appear arranged before mounting in Figure 3a and after mounting in Figure 3b.
• a spacer 6 is disposed on each side of the web 2, between said web and a gasket 3.
• the gasket comprises countersunk holes with a portion 32 large enough to accommodate a rivet head 7 and a narrower portion 33 to allow movement of the rivet body without allow passage of the rivet head.
• At the bottom of the widest part 32 is a counter-face 31 on which the rivet head can be supported.
• the part of the insert 6 intended to be in contact with the area of the hole 33 of the lining also comprises a hole 64 of the same diameter, as well as the web 2 which comprises a hole 21.
• the lining 3 located on the other side of the web 2 comprises a hole 34 capable of passing a rivet head.
• a rivet 7 is crimped to secure the lining 3, the insert 6 and the veil 2 by placing a head of this rivet on one side in contact with the facing face 31 and placing the other head of the rivet in the veil , the body of the rivet passing through the holes 33, 64, 21.
• the intermediate part 6 may be previously glued to the friction lining 3.
• a distance e between the two intermediate parts results from the presence of progressive areas in the web, in particular in the form of axially elastically deformable fins.
• Such fins appear in dashed lines in FIG. 1 and are presented in section in FIGS. 3 and 4.
• FIG. 4 shows a schematic section, according to BB of Figure 1, the same friction disc as shown in Figure 3.
• the web 2 comprises fins some of which is in sliding contact with a tab 63 of the first intermediate part 6, a second part is fixed to a perforated tab 62 of the second intermediate part 6, a third part to a perforated tab 62 of the first intermediate part 6 and a fourth part is in sliding contact with a lug 63 of the second intermediate part 6.
• a corrugated shape of this area of the veil which ensures the progressivity of the friction disc.
• all areas of the web 2 in contact with the liners are by means of lugs 62 or 63.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=38066606

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Family Cites Families (4)

• 2006
  • 2006-10-30 FR FR0654638A patent/FR2907864A1/fr not_active Withdrawn
• 2007
  • 2007-10-30 WO PCT/FR2007/052283 patent/WO2008053126A2/fr active Application Filing
  • 2007-10-30 KR KR1020097008816A patent/KR20090074065A/ko not_active Application Discontinuation
  • 2007-10-30 EP EP07866524A patent/EP2089635A2/fr not_active Withdrawn
  • 2007-10-30 BR BRPI0717792-5A patent/BRPI0717792A2/pt not_active Application Discontinuation
  • 2007-10-30 MX MX2009004795A patent/MX2009004795A/es unknown
  • 2007-10-30 CN CNA200780040285XA patent/CN101529109A/zh active Pending

Non-Patent Citations (1)

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