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EP2795148A1 - Embrayage à friction - Google Patents

Embrayage à friction

Info

Publication number
EP2795148A1
EP2795148A1 EP12816444.9A EP12816444A EP2795148A1 EP 2795148 A1 EP2795148 A1 EP 2795148A1 EP 12816444 A EP12816444 A EP 12816444A EP 2795148 A1 EP2795148 A1 EP 2795148A1
Authority
EP
European Patent Office
Prior art keywords
friction
clutch
pressure plate
plate
plate spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12816444.9A
Other languages
German (de)
English (en)
Inventor
Marc Finkenzeller
Eric Lambs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2795148A1 publication Critical patent/EP2795148A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/583—Diaphragm-springs, e.g. Belleville
    • F16D13/585—Arrangements or details relating to the mounting or support of the diaphragm on the clutch on the clutch cover or the pressure plate
    • 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
    • F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
    • 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
    • F16D13/75—Features relating to adjustment, e.g. slack adjusters
    • F16D13/757—Features relating to adjustment, e.g. slack adjusters the adjusting device being located on or inside the clutch cover, e.g. acting on the diaphragm or on the pressure plate

Definitions

  • the invention relates to a friction clutch, which can be used in particular as a starting clutch in a drive train of a motor vehicle and with the aid of a torque from an input shaft, such as a crankshaft of an engine, on an output shaft, such as an input shaft of a transmission, can be forwarded.
  • a torque generated by a motor vehicle engine can be transmitted via a flywheel rotatable about an axis of rotation. With the flywheel, a pressure plate for forwarding the torque is connected, which can then transmit the torque via a friction lining frictionally to a clutch disc.
  • An object of the invention is therefore to provide a friction clutch for a drive train of a vehicle, with the aid of an improved torque transmission when closing the clutch is enabled and less Anfahrrattern occurs, without significantly reducing Anfahr nie.
  • a friction clutch for a drive train of a motor vehicle, with a pressure plate which is non-rotatably, but axially limited displaceable connected to a clutch housing, a plate spring, which is effective between the housing and the pressure plate and the pressure plate acted upon in the axial direction to a Clamping disc between the pressure plate and a counter-plate clamped, and a damping device with at least one friction element which acts damping on at least axial vibrations of the pressure plate and / or the plate spring, wherein the at least one friction element has a contact region with one axial side of the plate spring and / or is operatively engaged with an outer edge of the pressure plate.
  • the friction clutch according to the invention is in particular as a starting clutch for
  • the damping device has a plurality of the friction elements and these can be distributed substantially uniformly about an axis of rotation of the clutch, in order to distribute their effect on the hysteresis of the clutch also largely uniform.
  • the at least one friction element is located in the contact region either with axial prestress on the axial side of the plate spring and / or with radial prestress on the outer edge of the pressure plate.
  • the at least one friction element of the damping device is axially fixed relative to the clutch housing or on the clutch housing.
  • the plate spring acts on the pressure plate in a radially outer region of the plate spring and the plate spring is connected in a radially inner region lying by means of a pivot bearing with the housing.
  • the at least one friction element is fixed to the pivot bearing.
  • the contact region of the at least one friction element can be operatively frictionally engaged with an axial side of the plate spring facing the clutch disk.
  • the contact area of the mini- at least one frictional friction rubbing operatively engaged with one of the clutch disc facing away from axial side of the plate spring.
  • the at least one friction element of the damping device in particular in the contact region, bow-shaped or wave-shaped.
  • the said friction elements may be attached to the plate spring, preferably to the leaves or tongues of the plate spring, so that the plate spring is formed in several layers.
  • the at least one friction element or each friction element in the contact region may have a treated surface, the surface preferably being treated by coating (for example with a polyamide) and / or by roughening (for example by blasting) to increase the coefficient of friction.
  • one or more friction elements are used which have a friction-increasing coating and / or a roughened surface.
  • the use of lubricants can be dispensed with in the contact area.
  • the at least one friction elements of the damping device is formed on an annular base body, wherein the annular base body is preferably fixedly connected to the coupling housing or connected.
  • the hysteresis of the coupling system according to the invention in particular the Ausschkrafthysterese be increased and by this targeted increase in the hysteresis of the coupling system (ie, the higher damping), the torque fluctuations can be reduced and thus the Ratterge Hursche be eliminated.
  • the hysteresis can basically be increased by increasing the coefficient of friction at the contact points pressure plate-plate spring, plate spring wire ring, plate spring centering pin / centering plate, disc spring release bearing.
  • Figure 1 a schematic sectional view of a portion of a friction clutch
  • Figure 2 is a sectional view of the friction clutch in Figure 1, a schematic sectional view of a portion of a friction clutch according to a second embodiment of the invention with biased friction between housing cover and disc spring, a schematic sectional view of a portion of a friction clutch according to a third embodiment of the invention with one of the support spring formed friction member in frictional contact with the plate spring tongues, a detailed sectional view of a portion of a plate spring in a friction clutch according to a fourth embodiment of the invention with a friction element arranged on a Belleville washer, a schematic sectional view of a portion of a friction clutch according to a fifth embodiment of the invention with a prestressed between Cover and wire ring inserted friction element, a schematic sectional view of a portion of a friction clutch according to a sixth embodiment of the invention with a friction element mounted on the pressure plate and a schematic sectional view of a portion of a plate spring for a friction clutch according to a
  • a friction clutch 1 according to a first embodiment is shown in a partial view.
  • the friction clutch 1, which is designed in particular for use as a starting clutch in a drive train of a motor vehicle, has a pressure plate 2 which is non-rotatably, but limitedly displaceable in the axial direction A connected to a clutch housing 3.
  • the part 1 shown in Figure 1 of the housing 3 in this embodiment is a housing cover 4.
  • the clutch 1, a plate spring 5, which is effective as a contact pressure between the pressure plate 2 and the housing 3 and the pressure plate 2 in the axial direction A (ie , in Figures 1 and 2 down) applied to a clutch disc S (shown purely schematically) between the pressure plate 2 and a counter plate (not shown) pinch.
  • the plate spring 5 presses in its radially outer region 6 against a provided on the pressure plate adjusting ring V, which lies opposite a spacer bolt B in the housing cover 4.
  • the radially outer portion 6 of the plate spring 5 is annular and the individual leaves or tongues Z of the plate spring 5 extend from the annular outer portion 6 radially inwardly.
  • the clutch 1 further comprises a damping device 7 with a plurality of friction elements 8, which are distributed substantially uniformly around an outer circumference of the pressure plate 2.
  • Each friction element 8 in this embodiment is bow-shaped (preferably made of sheet metal) and has a contact region 9, which is frictionally engaged with an elastic bias in the radial direction R (ie, radially inward) with an outer edge 10 of the pressure plate 2.
  • the opposite end 11 of the friction element or the friction yoke 8 is axially fixed to the cover 4 and thus relative to the housing 3.
  • the plate spring 5 Upon actuation of the clutch 1, the plate spring 5 is moved in the central region 12 in the axial direction A, which in turn causes an axial movement of the pressure plate 2 by means of a pivot bearing 13 with a disc spring pin 14 and a wire ring 15.
  • the friction elements 8 increase the hysteresis of the clutch 1 and thus have a damping effect on axial vibrations of the pressure plate 2 and / or the plate spring 5 a.
  • the friction elements 8 could be fixed to the outer edge 10 of the pressure plate 2, so that the ends 11 of the friction bracket 8 then rubbing engaged with the cover 4 and thus could represent the contact area.
  • a friction clutch 1 according to a second embodiment is shown schematically in partial view.
  • the general structure of the clutch 1 in this example corresponds to that of Figures 1 and 2, so that the clutch 1 again has a pressure plate 2, the rotationally fixed, but limited displacement in the axial direction A with a clutch housing 3 and housing cover 4 is connected.
  • the clutch 1 a plate spring 5, which is effective as a contact pressure between the pressure plate 2 and the housing 3 and the pressure plate 2 in the axial direction A (down) applied to a clutch plate S between the pressure plate 2 and a counter plate (not to pinch).
  • the clutch 1 further comprises a damping device 7 with a plurality of friction elements 8, which are distributed substantially uniformly around a radial circumference of the plate spring 5.
  • Each friction element 8 in this example is bow-shaped (preferably made of sheet metal) and has a contact region 9, which with elastic bias in the axial Direction A (down) with one of the clutch disc S remote axial side 16 of the plate spring 5 is frictionally engaged, in the radially outer region 6 of the plate spring 5, in which it acts on the pressure plate 2.
  • the opposite end 11 of the friction element or the friction yoke 6 is axially fixed to the cover 4 and thus relative to the housing 3.
  • the diaphragm spring 4 Upon actuation of the clutch 1, the diaphragm spring 4 is moved in its central region 12 in the axial direction A, which in turn causes an axial movement of the pressure plate 2 by means of a pivot bearing 13 with a wire ring 15.
  • the friction elements 8 increase the hysteresis of the clutch 1 and thus have a damping effect on axial vibrations of the pressure plate 2 and the plate spring 5 a.
  • a part of a friction clutch 1 according to a third embodiment is shown.
  • the general structure of the coupling 1 in this example corresponds to that of Figure 3.
  • the friction elements 8 of the damping device 7 are again bow-shaped, preferably made of sheet metal, but are arranged in this case on the pivot bearing 13 of the plate spring 5 on the housing 3.
  • the friction elements or friction yokes 8 on the disc spring pin 14 are axially fixed again relative to the clutch housing 3.
  • each friction yoke 8 is operatively frictionally engaged with elastic bias in the axial direction A (upward) in engagement with a side 17 of the diaphragm spring 5 facing the clutch disc S, in contact with the blades or tongues Z of the diaphragm spring 5 in FIG Area of the pivot bearing 13, which is radially further inside than the radially outer portion 9 of the loading of the plate spring 4.
  • the friction elements 8 increase the hysteresis of the clutch 1 by its frictional contact with the axial side 17 of the plate spring 5 and thus have a damping effect on axial vibrations of the pressure plate 2 and the plate spring 5 a.
  • FIG. 5 a completely different type of friction element 8 of the damping device 7 for a friction clutch 1 according to a fourth exemplary embodiment is shown.
  • the friction elements 8 are similar to how shaft seals (sealing lips) constructed and arranged rubbing against the disc spring pin 14.
  • the friction element 8 shown in Figure 5 surrounds the edges of a hole 18 through the plate spring 5 and thus extends on both axial sides 16, 17 of the plate spring 5. Further, the friction element 8 defines a central channel for receiving the bolt 14 and an inner contact surface 19th of the channel is undulating to create a desired friction with the bolt 14.
  • the friction elements 8 in this embodiment increase the hysteresis of the clutch 1 by its frictional contact with the sides 16, 17 of the plate spring 5 and with the Belleville washer bolts 14 and NEN thus damping effect on axial vibrations of the pressure plate 2 and the plate spring 5.
  • FIG. 6 a part of a friction clutch 1 according to a fifth embodiment is shown.
  • the friction element 8 is inserted between the cover 4 and the wire ring 15 and thus axially fixed relative to the housing 3 on the pivot bearing 13.
  • the contact region 9 of each friction element 8 is frictionally engaged in the axial direction A (down) with the side 16 of the plate spring 5 and thus generates a friction in the annular radially outer region 6, which increases the hysteresis of the clutch 1 and damping on Axial vibrations of the pressure plate 2 and the plate spring 5 acts.
  • FIG 7 a further embodiment is shown, in which the friction element 8 is formed as a Abhubbügel, which is fixed at one end 11 on the pressure plate 2. The other end thus forms the contact region 9, which is frictionally engaged with the side 17 of the plate spring 5.
  • the disadvantage here is the Relativweg between the pressure plate 2 and the plate spring 5 due to an adjustment of the clutch 1 in the event of wear, resulting in an undesirable additional bias.
  • the friction yoke 8 is not fixed axially with respect to the housing 3.
  • the friction element 8 is attached to the plate spring 5, in particular at its radially outer portion 6, so that the plate spring 5 is formed multi-layer and generates a desired friction with the adjusting ring V upon actuation of the clutch 1.
  • friction elements 8 can be attached to the blades or tongues Z of the disc spring 5, so that an increase in the hysteresis of the clutch 1 is achieved in that the plate spring 5 is constructed as a spring assembly. This can occur between contact surfaces of the disc springs friction.
  • the friction between the disk spring and centering element can be increased.
  • the number of centering windows can be increased, which entails an increase in the hysteresis.
  • the friction in the clutch system 1 and thus the hysteresis can be increased. Due to the increased hysteresis in the coupling system 1, the formation of chattering noise during startup should be prevented.
  • the Application is provided in particular for couplings with wegenfiner wear adjustment.

Landscapes

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

Abstract

L'invention concerne un embrayage à friction pour une chaîne cinématique d'un véhicule automobile. Cet embrayage à friction comporte une plaque de pression qui est reliée à un boîtier de manière solidaire en rotation, mais déplaçable axialement dans une mesure limitée, un ressort à diaphragme qui agit entre le boîtier et la plaque de pression et agit sur la plaque de pression dans le sens axial pour serrer un disque d'embrayage entre la plaque de pression et une plaque opposée et un dispositif d'amortissement comprenant au moins un élément de friction, qui exerce un effet amortissant au moins sur des vibrations axiales de la plaque de pression et/ou du ressort à diaphragme. Ledit au moins un élément de friction présente une zone de contact qui coopère fonctionnellement avec un côté axial du ressort à diaphragme et/ou avec un bord extérieur de la plaque de pression. Des mesures de construction relativement simples permettent d'augmenter l'hystérésis de l'embrayage selon l'invention et ainsi de réduire la variation de couple.
EP12816444.9A 2011-12-22 2012-12-05 Embrayage à friction Withdrawn EP2795148A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011089552 2011-12-22
PCT/DE2012/001158 WO2013091598A1 (fr) 2011-12-22 2012-12-05 Embrayage à friction

Publications (1)

Publication Number Publication Date
EP2795148A1 true EP2795148A1 (fr) 2014-10-29

Family

ID=47594163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12816444.9A Withdrawn EP2795148A1 (fr) 2011-12-22 2012-12-05 Embrayage à friction

Country Status (4)

Country Link
EP (1) EP2795148A1 (fr)
CN (1) CN104040203B (fr)
DE (2) DE112012005409A5 (fr)
WO (1) WO2013091598A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014211809A1 (de) * 2013-07-11 2015-01-15 Schaeffler Technologies Gmbh & Co. Kg Deckelseitiger Drahtring mit Zusatzfeder zur Hysterese-Erzeugung
WO2015161850A1 (fr) * 2014-04-25 2015-10-29 Schaeffler Technologies AG & Co. KG Embrayage à friction optimisé pour le montage, à segments partiels de boulon de ressort de levier fixés les uns aux autres à force et/ou par liaison de matière
DE102014216315A1 (de) * 2014-08-18 2016-02-18 Schaeffler Technologies AG & Co. KG Deckelbaugruppe für eine Kupplung mit einem axial vorgespannten Drahtring sowie Kupplung mit solcher Deckelbaugruppe
FR3029998B1 (fr) * 2014-12-16 2018-04-20 Valeo Embrayages Mecanisme d'embrayage, notamment pour vehicule automobile
DE102015213980A1 (de) 2015-07-24 2017-01-26 Schaeffler Technologies AG & Co. KG Kupplung mit asymmetrischer Dämpfungseinheit
DE102016209231B3 (de) * 2016-05-27 2017-08-24 Schaeffler Technologies AG & Co. KG Druckplattenanordnung für eine Reibkupplung mit zumindest einem Reibblech sowie Reibkupplung mit einer entsprechenden Druckplattenanordnung
DE102016219673A1 (de) 2016-10-11 2018-04-12 Schaeffler Technologies AG & Co. KG Reibelement, Reibungskupplung und Antriebsstrang
DE102022105231A1 (de) 2022-03-07 2023-06-22 Audi Aktiengesellschaft Türanordnung für ein Fahrzeug

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2753503B1 (fr) * 1996-09-17 1998-12-04 Valeo Embrayage a friction a dispositif de rattrapage d'usure, notamment pour vehicule automobile
DE19746281B4 (de) 1996-10-24 2007-10-04 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Reibungskupplung
EP0882902A1 (fr) * 1997-06-06 1998-12-09 Ford-Werke Aktiengesellschaft Dispositif anti-vibration pour le diaphragme d'un embrayage à friction
DE19830660A1 (de) * 1998-07-09 2000-01-20 Sachs Race Eng Gmbh Reibungskupplung mit Nickelchromlegierungs-Federelementen
FR2842578B1 (fr) * 2002-06-19 2006-06-09 Zf Sachs Ag Embrayage a friction notamment pour vehicule automobile
DE112008003201A5 (de) * 2007-09-24 2010-09-02 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Reibungskupplung
DE102009020289A1 (de) * 2009-05-07 2010-11-11 Zf Friedrichshafen Ag Druckplattenbaugruppe für eine Reibungskupplung
DE102009045980B4 (de) * 2009-10-26 2011-12-08 Zf Friedrichshafen Ag Reibungskupplung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013091598A1 *

Also Published As

Publication number Publication date
CN104040203B (zh) 2017-01-18
CN104040203A (zh) 2014-09-10
DE112012005409A5 (de) 2014-09-04
WO2013091598A1 (fr) 2013-06-27
DE102012222269A1 (de) 2013-06-27

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