WO1996037713A1 - Ressort de pression pour dispositif de debrayage d'embrayages automobiles - Google Patents

Ressort de pression pour dispositif de debrayage d'embrayages automobiles Download PDF

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Publication number
WO1996037713A1
WO1996037713A1 PCT/EP1995/005020 EP9505020W WO9637713A1 WO 1996037713 A1 WO1996037713 A1 WO 1996037713A1 EP 9505020 W EP9505020 W EP 9505020W WO 9637713 A1 WO9637713 A1 WO 9637713A1
Authority
WO
WIPO (PCT)
Prior art keywords
compression spring
unit according
disengaging unit
ring
release bearing
Prior art date
Application number
PCT/EP1995/005020
Other languages
German (de)
English (en)
Inventor
Hartmut Koschmieder
Original Assignee
Ina Wälzlager Schaeffler 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 Ina Wälzlager Schaeffler Kg filed Critical Ina Wälzlager Schaeffler Kg
Priority to DE19581664A priority Critical patent/DE19581664C1/de
Priority to DE19581664D priority patent/DE19581664D2/de
Publication of WO1996037713A1 publication Critical patent/WO1996037713A1/fr

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
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
    • F16D25/083—Actuators therefor

Definitions

  • the invention relates to a release unit for a clutch in motor vehicles for optional disconnection and connection of two shafts, consisting of a pressure housing arranged around a drive shaft or the like with a slave cylinder in which an annular piston is guided, at one end of which a release bearing is arranged, which is located supported on the clutch, and is acted upon regardless of its position by means of a compression spring which is supported directly or indirectly between the pressure housing and a bearing ring of the clutch release bearing.
  • Such a disengaging unit is known from EP-A 0 504 906.
  • the disengaging unit described and illustrated therein has a cylindrical pressure spring which bears against vertical support surfaces at both ends without exact guidance.
  • the compression spring can disadvantageously move radially.
  • the end turns of the compression spring are not fixed in position, so that when the release unit is actuated, which causes a change in length and at the same time a limited torsion of the compression spring, the end turns on the support surfaces are rotated disadvantageously.
  • the twisting of the end turns has a wear-promoting effect and can lead to disadvantageous noise development.
  • the object of the invention is therefore to provide a noise-damping, life-increasing compression spring arrangement, which also leads to a self-reinforcing effect.
  • the invention according to claim 1 provides in the area of both support surfaces on the bearing inner ring and on the pressure housing for fixing the position of the compression spring in each case an axially projecting ring shoulder, on which the spring ends are held under frictional engagement. This ensures an effective position fixation of the compression spring ends, which remains guaranteed in all operating states of the disengaging device.
  • the compression spring arrangement according to the invention advantageously triggers a self-reinforcing effect of the compression spring, ie, due to the anti-rotation lock of the compression spring ends, the spring ends are not rotated when the disengaging device is actuated, which advantageously increases the achievable spring force.
  • the position fixing of the spring ends also prevents noise and enables wear-free installation of the compression spring that increases the service life.
  • the ring shoulder is designed so that it encloses a spring end.
  • an outer guide of the compression spring is preferably provided in the area of the support surface.
  • At least one end turn of the compression spring is pressed in excess in the protruding ring shoulder or this end turn lies radially widened on the outside on the outer surface of the ring shoulder.
  • This configuration ensures a radially prestressed contact of the compression spring on the ring shoulder.
  • the inventive idea also includes that more than one turn is enclosed by the ring shoulder.
  • the annular shoulders are each designed conically expanding or tapering starting from one of the support surfaces. This shape of the annular shoulder results in a radial widening or narrowing of the end windings in the installed position when the pressure springs are installed and, due to the pretensioned position, the spring ends on the support surface being fixed in a desired manner.
  • the invention according to claim 5 provides as noise-damping measures to coat the compression spring or to see it with an elastic sleeve. This configuration advantageously prevents direct radial contact of the compression spring windings with neighboring components.
  • the compression spring is provided with an elastic covering which bears against the compression spring under prestress, which can follow any change in length of the compression spring.
  • the compression spring has an elastic sleeve which also bears against the inside of the spring windings under pretension.
  • the compression spring is embedded in a plastic ring. The envelope, the sleeve, as well as the plastic ring is designed so that these measures can follow any change in length of the compression spring.
  • a PTFE coating is particularly suitable for this, which ensures a permanent, elastic coating.
  • the measures according to the invention for noise reduction and for achieving a self-reinforcing effect can be used both on cylindrically designed compression springs and on compression springs in a conical design.
  • FIG. 1 shows in half section a disengaging unit according to the invention with a cylindrical compression spring
  • FIG 2 shows a release unit according to Figure 1, which has a conically shaped compression spring.
  • a disengaging unit 1 is shown in half-section, which is concentrically arranged in the installed state to a not shown in Figure 1 to ⁇ drive shaft.
  • the disengaging unit 1 comprises a pressure housing 2 which has a longitudinal bore 3 which, together with a guide sleeve which is attached to the pressure housing 2 at a radial distance, forms an annular pressure chamber 5 in which an annular piston 6 is guided so as to be longitudinally displaceable.
  • a bearing inner ring 8 of a release bearing 7 is arranged on the ring piston 6 in a rotationally fixed manner.
  • the release bearing 7 lies non-positively on a friction clutch via an outer bearing ring 9.
  • a compression spring 10 is inserted between the pressure housing 2 and the bearing inner ring 8 in order to achieve a non-positive engagement of the release bearing 7 on the friction clutch, regardless of a pressure medium being applied to the pressure chamber 5.
  • the pressure housing and the bearing inner ring 8 each have ring shoulders 15, 16 surrounding the end windings 11, 12 in the area of a support surface 13, 14.
  • FIG. 1 shows an elastic covering 17, which encloses the compression spring 10 under pretension and thus direct contact of the compression spring 10 with components arranged radially on the outside, e.g. B. in the bearing inner ring 8.
  • the compression spring 10 can also be assigned a likewise elastic sleeve 18, which rests under tension on the inside against the windings of the compression spring 10 and prevents contact with the components arranged radially on the inside, for example the pressure housing 2.
  • a second exemplary embodiment (FIG. 2) of a slave cylinder 1 according to the invention the components which correspond to the first exemplary embodiment are provided with the same reference numerals, so that reference can be made to the description of the first exemplary embodiment with regard to their description.
  • a conical compression spring 20 is used in FIG. 2, which is also supported directly on the pressure housing 2 and on the bearing inner ring 8.
  • a plastic ring 21, in which the compression spring 20 is embedded, is used for effective noise insulation.
  • the plastic ring 21 is made of a highly elastic material, for example foam, which follows every direction of movement of the compression spring and has no effect whatsoever on the function of the compression spring 2.

Landscapes

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

Abstract

L'invention concerne un dispositif de débrayage (1) destiné à un embrayage d'automobile, comprenant un boîtier de pression (2) disposé autour d'un arbre primaire ou similaire, et dans lequel est guidé un piston annulaire (6) dont l'une des extrémités comporte un palier de débrayage (7) prenant appui sur l'embrayage. Le palier de débrayage (7), quelle que soit sa position, est sollicité par un ressort de pression (10) qui prend appui directement ou non entre le boîtier de pression (2) et une bague du palier de débrayage (7). En vue de la fixation de la position du ressort de pression (10), ce dernier est pourvu d'un dispositif de guidage interne ou externe au niveau des surfaces d'appui (13, 14) sur le boîtier de pression (2) et sur la bague intérieure de palier (8).
PCT/EP1995/005020 1995-05-23 1995-12-19 Ressort de pression pour dispositif de debrayage d'embrayages automobiles WO1996037713A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19581664A DE19581664C1 (de) 1995-05-23 1995-12-19 Druckfeder für eine Ausrückeinheit von Fahrzeugkupplungen
DE19581664D DE19581664D2 (de) 1995-05-23 1995-12-19 Druckfeder für eine Ausrückeinheit von Fahrzeugkupplungen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518833.0 1995-05-23
DE19518833A DE19518833A1 (de) 1995-05-23 1995-05-23 Druckfeder für eine Ausrückeinheit von Fahrzeugkupplungen

Publications (1)

Publication Number Publication Date
WO1996037713A1 true WO1996037713A1 (fr) 1996-11-28

Family

ID=7762621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/005020 WO1996037713A1 (fr) 1995-05-23 1995-12-19 Ressort de pression pour dispositif de debrayage d'embrayages automobiles

Country Status (2)

Country Link
DE (2) DE19518833A1 (fr)
WO (1) WO1996037713A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344395A (en) * 1998-11-05 2000-06-07 Luk Lamellen & Kupplungsbau Retaining ring for an hydraulically operated clutch release system

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19609472A1 (de) * 1996-03-04 1997-09-11 Schaeffler Waelzlager Kg Ringkolbendichtung für ein hydraulisch betätigbares Ausrücksystem
FR2772443B1 (fr) * 1997-12-11 2001-09-28 Valeo Recepteur hydraulique de commande d'embrayage notamment pour vehicule automobile
US5887692A (en) * 1997-01-10 1999-03-30 Automotive Products (Usa), Inc. Hydraulic pressure cylinder with combined boot and spring
FR2772444B1 (fr) * 1997-12-11 2000-06-16 Valeo Recepteur hydraulique pour commande d'embrayage, notamment pour vehicule automobile
FR2780468B1 (fr) * 1998-06-30 2000-09-08 Valeo Recepteur hydraulique, notamment d'embrayage, a course du piston limitee
DE19957573A1 (de) * 1998-12-11 2000-06-15 Luk Lamellen & Kupplungsbau Dichtungsträger der zwischen der hydraulischen Ausrückvorrichtung und einem Getriebegehäuse angeordnet ist
DE102005007741B4 (de) * 2005-02-18 2010-11-11 Stabilus Gmbh Kolbenzylindereinheit mit einer Schraubendruckfeder
BRPI0611972B1 (pt) * 2005-06-24 2019-03-06 Schaeffler Technologies AG & Co. KG Dispositivo de cilindro servo de embreagem
DE102009034399B4 (de) * 2008-08-07 2021-06-24 Schaeffler Technologies AG & Co. KG Betätigungseinheit für eine Reibungskupplung
DE112010002722A5 (de) 2009-06-25 2012-07-05 Schaeffler Technologies AG & Co. KG Ausrücker
DE102011018411B4 (de) * 2010-05-10 2020-03-26 Schaeffler Technologies AG & Co. KG Ausrücker zur Betätigung einer Kupplung
DE112012003262A5 (de) * 2011-08-05 2014-05-08 Schaeffler Technologies Gmbh & Co. Kg Ausrücksystem
DE102012212296A1 (de) * 2011-08-05 2013-02-07 Schaeffler Technologies AG & Co. KG Nehmerzylinder

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564394A (en) * 1949-04-09 1951-08-14 Shell Dev Metallic coiled spring with protective cover
FR2180396A5 (fr) * 1972-04-13 1973-11-23 Skf Ind Trading & Dev
DE3043861A1 (de) * 1980-11-21 1982-08-19 Fichtel & Sachs Ag, 8720 Schweinfurt Hydraulisch oder pneumatisch betaetigter kupplungs-ausruecker
GB2149059A (en) * 1983-08-18 1985-06-05 Automotive Products Plc Torsional vibration damper for clutch plates
JPS6155420A (ja) * 1984-08-28 1986-03-19 Matsushita Electric Ind Co Ltd バネ防振具
US4634432A (en) * 1985-05-13 1987-01-06 Nuri Kocak Introducer sheath assembly
DE3623627A1 (de) * 1986-07-12 1988-01-14 Fichtel & Sachs Ag Verfahren zum betrieb einer reibungskupplung
FR2611838A1 (fr) * 1987-03-06 1988-09-09 Fraymon Sa Dispositif d'actionnement d'embrayage a commande hydraulique
US4913276A (en) * 1987-06-27 1990-04-03 Nippon Seiko Kabushiki Kaisha Clutch releasing apparatus
US5267637A (en) * 1992-08-17 1993-12-07 Automotive Products Plc Actuator with anti-rotation spring
DE4338262A1 (de) * 1992-11-14 1994-05-19 Fichtel & Sachs Ag Hydraulisch betätigbares Ausrücksystem für eine gezogene Reibungskupplung
DE4313346A1 (de) * 1993-04-23 1994-10-27 Fichtel & Sachs Ag Hydraulisch betätigbares Ausrücksystem

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1365393A (en) * 1971-04-13 1974-09-04 Skf Uk Ltd Clutch withdrawal bearing assemblies
US4660694A (en) * 1985-03-07 1987-04-28 Automotive Products Plc Prefilled hydraulic control apparatus for motor vehicle mechanical clutch
DE4109125A1 (de) * 1991-03-20 1992-09-24 Fichtel & Sachs Ag Vakuumunterstuetztes befuellen einer hydraulischen kupplungsbetaetigung
SE502449C2 (sv) * 1992-09-08 1995-10-23 Saab Scania Ab Arrangemang vid en dragande friktionskoppling mellan en motor och en växellåda
FR2697879B1 (fr) * 1992-11-10 1994-12-23 Automotive Prod France Cylindre asservi d'embrayage hydraulique dont le piston comporte une partie extensible télescopiquement.

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564394A (en) * 1949-04-09 1951-08-14 Shell Dev Metallic coiled spring with protective cover
FR2180396A5 (fr) * 1972-04-13 1973-11-23 Skf Ind Trading & Dev
DE3043861A1 (de) * 1980-11-21 1982-08-19 Fichtel & Sachs Ag, 8720 Schweinfurt Hydraulisch oder pneumatisch betaetigter kupplungs-ausruecker
GB2149059A (en) * 1983-08-18 1985-06-05 Automotive Products Plc Torsional vibration damper for clutch plates
JPS6155420A (ja) * 1984-08-28 1986-03-19 Matsushita Electric Ind Co Ltd バネ防振具
US4634432A (en) * 1985-05-13 1987-01-06 Nuri Kocak Introducer sheath assembly
DE3623627A1 (de) * 1986-07-12 1988-01-14 Fichtel & Sachs Ag Verfahren zum betrieb einer reibungskupplung
FR2611838A1 (fr) * 1987-03-06 1988-09-09 Fraymon Sa Dispositif d'actionnement d'embrayage a commande hydraulique
US4913276A (en) * 1987-06-27 1990-04-03 Nippon Seiko Kabushiki Kaisha Clutch releasing apparatus
US5267637A (en) * 1992-08-17 1993-12-07 Automotive Products Plc Actuator with anti-rotation spring
DE4338262A1 (de) * 1992-11-14 1994-05-19 Fichtel & Sachs Ag Hydraulisch betätigbares Ausrücksystem für eine gezogene Reibungskupplung
DE4313346A1 (de) * 1993-04-23 1994-10-27 Fichtel & Sachs Ag Hydraulisch betätigbares Ausrücksystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 218 (M - 503)<2274> 30 July 1986 (1986-07-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344395A (en) * 1998-11-05 2000-06-07 Luk Lamellen & Kupplungsbau Retaining ring for an hydraulically operated clutch release system

Also Published As

Publication number Publication date
DE19518833A1 (de) 1996-11-28
DE19581664C1 (de) 2002-03-14

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