WO1996037713A1 - Vehicle clutch release unit pressure spring - Google Patents

Vehicle clutch release unit pressure spring 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)
French (fr)
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 DE19581664D priority Critical patent/DE19581664D2/en
Priority to DE19581664A priority patent/DE19581664C1/en
Publication of WO1996037713A1 publication Critical patent/WO1996037713A1/en

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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.

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

Abstract

The invention concerns a motor vehicle clutch release unit (1) comprising a housing (2) which is disposed about a drive shaft or the like and in which is guided an annular piston (6) at one end of which is disposed a release bearing (7) supported on the clutch. Irrespective of the position of the release bearing (7), the latter is acted upon by a pressure spring (10) which is supported directly or indirectly between the housing (2) and a bearing ring of the release bearing (7). According to the invention, in order to secure the pressure spring (10) in position, the latter is provided with an external or internal guide device in the region of support faces (13, 14) on the housing (2) and on the inner bearing ring (8).

Description

Beschreibung description
Druckfeder für eine Ausrückeinheit von FahrzeugkupplungenPressure spring for a disengagement unit of vehicle clutches
Die Erfindung betrifft eine Ausrückeinheit für eine Kupplung in Kraftfahrzeugen zum wahlweisen Trennen und Verbinden zweier Wellen, bestehend aus einem um eine Antriebswelle oder dergleichen angeordnetes Druckgehäuse mit einem Nehmerzylinder, in dem ein Ringkolben geführt ist, an dessen einem Ende ein Ausrücklager angeordnet ist, das sich an der Kupplung abstützt, und unabhängig von seiner Stellung mittels einer Druckfeder beaufschlagt ist, die unmittelbar oder mittelbar zwischen dem Druckgehäuse und einem Lagerring des Kupp- lungsausrücklagers abgestützt ist.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.
Eine derartige Ausrückeinheit ist aus der EP-A 0 504 906 bekannt. Die darin beschriebene und abgebildete Ausrückeinheit weist eine zylindrische Druckfe¬ der auf, die an beiden Enden ohne exakte Führung an vertikalen Abstützflächen anliegt. Dadurch kann sich die Druckfeder nachteilig radial verlagern. Außer¬ dem sind die Endwindungen der Druckfeder nicht lagefixiert, wodurch sich bei einer Betätigung der Ausrückeinheit, die eine Längenänderung und gleichzeitig eine begrenzte Torsion der Druckfeder bewirkt, eine nachteilige Verdrehung der Endwindungen an den Abstützflächen einstellt. Das Verdrehen der Endwindun- gen wirkt sich verschleißfördernd aus und kann zu einer nachteiligen Geräusch¬ entwicklung führen.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. As a result, the compression spring can disadvantageously move radially. In addition, 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.
Aufgabe der Erfindung ist es daher, eine geräuschdämpfende, die Lebensdauer erhöhende Druckfederanordnung zu schaffen, die außerdem zu einem Selbstver- Stärkungseffekt führt.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.
Diese Aufgabe wird durch die kennzeichnenden Merkmale der Ansprüche 1 und 5 gelöst. Die Erfindung nach Anspruch 1 sieht im Bereich beider Abstützflächen am Lagerinnenring und am Druckgehäuse zur Lagefixierung der Druckfeder jeweils eine axial vorstehende Ringschulter vor, an der die Federenden vorgespannt unter Reibschluß gehalten sind. Damit ist eine wirksame Lagefixierung der Druckfederenden sichergestellt, die in allen Betriebszuständen der Ausrückein¬ richtung gewährleistet bleibt. In vorteilhafter Weise löst die erfindungsgemäße Druckfederanordung einen Selbstverstärkungseffekt der Druckfeder aus, d. h. bedingt durch die Verdrehsicherung der Druckfederenden unterbleibt bei einer Betätigung der Ausrückeinrichtung ein Verdrehen der Federenden, wodurch sich in vorteilhafter Weise die erzielbare Federkraft erhöht. Die Lagefixierung der Federenden verhindert außerdem eine Geräuschentwicklung und ermöglicht einen verschleißfreien, die Lebensdauer erhöhenden Einbau der Druckfeder.This object is achieved by the characterizing features of claims 1 and 5. 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.
In einer Ausgestaltung der Erfindung nach Anspruch 2 ist die Ringschulter so ausgebildet, daß diese ein Federende umschließt. Alternativ dazu bietet sich eine Ringschulter-Ausbildung an, auf der die Druckfeder außenseitig anliegt. Zur Nutzung einer größtmöglichen Anlage- und Führungsfläche ist vorzugsweise eine äußere Führung der Druckfeder im Bereich der Abstützfläche vorgesehen.In one embodiment of the invention according to claim 2, the ring shoulder is designed so that it encloses a spring end. As an alternative, there is an annular shoulder design on which the compression spring rests on the outside. To use the largest possible contact and guide surface, an outer guide of the compression spring is preferably provided in the area of the support surface.
Nach Anspruch 3 ist es zweckmäßig, daß zumindest eine Endwindung der Druckfeder mit Übermaß in der vorstehenden Ringschulter eingepreßt wird oder diese Endwindung radial aufgeweitet außenseitig auf der Mantelfläche der Ringschulter anliegt. Diese Ausgestaltung stellt eine radial vorgespannte Anlage der Druckfeder an der Ringschulter sicher. Der Erfindungsgedanke schließt ebenfalls ein, daß mehr als eine Windung von der Ringschulter umschlossen werden.According to claim 3, it is expedient that 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.
Gemäß Anspruch 4 sind die Ringschultern jeweils ausgehend von einer der Abstützflächen konisch aufweitend oder konisch sich verjüngend gestaltet. Durch diese Formgebung der Ringschulter kommt es beim Einbau der Druckfe¬ der zu einer radialen Aufweitung oder Verengung der Endwindungen in der Einbaulage und aufgrund der vorgespannten Lage zu einer gewünschten Lagefi¬ xierung der Federenden an der Abstützfläche. Die Erfindung nach Anspruch 5 sieht als geräuschdämpfende Maßnahmen vor, die Druckfeder zu beschichten oder diese mit einer elastischen Hülse zu ver¬ sehen. Diese Ausgestaltung verhindert in vorteilhafter Weise eine unmittelbare radiale Berührung der Druckfederwindungen mit benachbarten Bauteilen.According to claim 4, 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.
Nach Anspruch 6 ist die Druckfeder mit einer elastischen Umhüllung versehen, die unter Vorspannung an der Druckfeder anliegt, wobei diese jeder Längenver¬ änderung der Druckfeder folgen kann. Alternativ dazu weist die Druckfeder gemäß Anspruch 7 eine ebenfalls unter Vorspannung innenseitig an den Feder- Windungen anliegende elastische Hülse auf. In weiterer vorteilhafter Ausgestal¬ tung der Erfindung nach Anspruch 8 ist die Druckfeder in einen Kunststoffring eingebettet. Dabei ist die Umhüllung, die Hülse, wie auch der Kunststoff ring so ausgeführt, daß diese Maßnahmen jeder Längenänderung der Druckfeder folgen können.According to claim 6, 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. As an alternative to this, the compression spring has an elastic sleeve which also bears against the inside of the spring windings under pretension. In a further advantageous embodiment of the invention according to claim 8, 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.
Nach Anspruch 9 ist es zweckmäßig, die Druckfeder zur Erreichung einer kostengünstigen Geräuschdämpfungsmaßnahme allseitig zu beschichten. Dazu eignet sich insbesondere eine PTFE-Beschichtung, die eine dauerhafte, elastische Beschichtung sicherstellt.According to claim 9, it is expedient to coat the compression spring on all sides to achieve a cost-effective noise reduction measure. A PTFE coating is particularly suitable for this, which ensures a permanent, elastic coating.
Gemäß Anspruch 10 ist vorgesehen, daß die erfindungsgemäßen Maßnahmen zur Geräuschdämpfung sowie zur Erreichung eines Selbstverstärkungseffektes sowohl an zylindrisch gestalteten Druckfedern einsetzbar sind als auch an Druckfedern in einer konischen Bauform.According to claim 10 it is provided that 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.
Nachstehend wird die Erfindung anhand von zwei Ausführungsbeispielen in insgesamt zwei Figuren dargestellt und näher erläutert. Es zeigen:The invention is illustrated and explained in more detail in two figures using two exemplary embodiments. Show it:
Figur 1 in einem Halbschnitt eine erfindungsgemäße Ausrückeinheit mit einer zylindrischen Druckfeder;1 shows in half section a disengaging unit according to the invention with a cylindrical compression spring;
Figur 2 eine Ausrückeinheit gemäß Figur 1 , der eine konisch gestaltete Druckfeder aufweist. in der Figur 1 ist eine Ausrückeinheit 1 im Halbschnitt dargestellt, der im eingebauten Zustand konzentrisch um eine in Figur 1 nicht abgebildete An¬ triebswelle angeordnet ist. Die Ausrückeinheit 1 umfaßt ein Druckgehäuse 2, das eine Längsbohrung 3 aufweist, die mit einer radial beabstandet am Druck- gehäuse 2 befestigten Führungshülse einen kreisringförmigen Druckraum 5 bildet, in dem ein Ringkolben 6 längsverschiebbar geführt ist. An dem vom Druckraum 5 abgewandten Ende ist am Ringkolben 6 ein Lagerinnenring 8 eines Ausrücklagers 7 drehfest angeordnet. Im eingebauten Zustand liegt das Ausrücklager 7 über einen Lageraußenring 9 kraftschlüssig an einer Reibungs- kupplung an. Zur Erreichung einer kraftschlüssigen Anlage des Ausrücklagers 7 an der Reibungskupplung unabhängig von einer Druckmittelbeaufschlagung des Druckraums 5 ist zwischen dem Druckgehäuse 2 und dem Lagerinnenring 8 eine Druckfeder 10 eingesetzt. Zur Schaffung einer wirksamen Lagefixierung von Endwindungen 1 1 , 12 der Druckfeder 10 weisen das Druckgehäuse und der Lagerinnenring 8 jeweils im Bereich einer Abstützfläche 13, 14 die Endwin¬ dungen 1 1 , 12 umschließende Ringschultern 15, 16 auf.Figure 2 shows a release unit according to Figure 1, which has a conically shaped compression spring. in the Figure 1, 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. At the end facing away from the pressure chamber 5, a bearing inner ring 8 of a release bearing 7 is arranged on the ring piston 6 in a rotationally fixed manner. In the installed state, 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. To create an effective position fixation of end windings 11, 12 of the compression spring 10, 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.
Dabei sind die Endwindungen 1 1 , 12 mit einem Übermaß in einen von den Ringschultern 15, 16 gebildeten Ringraum gepreßt, wodurch sich ein Reib- Schluß bildet, und die Endwindungen 1 1 , 12 drehstarr an den Abstützflächen 13, 14 anliegen. Diese erfindungsgemäße Druckfederanordnung löst aufgrund der starren Anbindung einen Selbstverstärkungseffekt aus und bewirkt eine Ge¬ räuschdämpfung im Vergleich zu bisherigen Druckfederanordnungen, bei denen die Endwindungen sich bei einer Betätigung des Nehmerzylinders an der Abstützfläche verlagern können. Als weitere geräuschdämpfende Maßnahme zeigt die Figur 1 eine elastische Umhüllung 1 7, die unter Vorspannung die Druckfeder 10 umschließt und damit einen unmittelbaren Kontakt der Druckfe¬ der 10 mit radial außen angeordneten Bauteilen, z. B. im Lagerinnenring 8 unterbindet. Alternativ oder ergänzend kann der Druckfeder 10 eine ebenfalls elastische Hülse 18 zugeordnet werden, die unter Vorspannung innenseitig an den Windungen der Druckfeder 10 anliegt und einen Kontakt zu den radial innen angeordneten Bauteilen, beispielsweise dem Druckgehäuse 2 verhindert. In einem zweiten Ausführungsbeispiel (Figur 2) eines erfindungsgemäßen Nehmerzylinders 1 sind die mit dem ersten Ausführungsbeispiel übereinstim¬ menden Bauteile mit gleichen Bezugsziffern versehen, so daß bezüglich deren Beschreibung auf die Ausführung zum ersten Ausführungsbeispiel verwiesen werden kann.The end windings 1 1, 12 are pressed with an oversize into an annular space formed by the annular shoulders 15, 16, as a result of which a frictional connection is formed, and the end windings 1 1, 12 rest against the support surfaces 13, 14 in a rotationally rigid manner. Due to the rigid connection, this compression spring arrangement according to the invention triggers a self-reinforcing effect and causes noise reduction in comparison to previous compression spring arrangements in which the end windings can shift on the support surface when the slave cylinder is actuated. As a further noise-damping measure, 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. As an alternative or in addition, 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. In 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.
In Figur 2 ist abweichend zu Figur 1 eine konisch gestaltete Druckfeder 20 eingesetzt, die ebenfalls unmittelbar am Druckgehäuse 2 und am Lagerinnenring 8 abgestützt ist. Zur wirksamen Geräuschdämmung dient ein Kunststoffring 21 , in den die Druckfeder 20 eingebettet ist. Der Kunststoffring 21 ist dazu aus einem hochelastischen Werkstoff hergestellt, beispielsweise Schaumstoff, der jeder Bewegungsrichtung der Druckfeder folgt und dabei keinerlei die Funktion der Druckfeder 2 beeinflussende Wirkung besitzt. In contrast to FIG. 1, 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. For this purpose, 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.
BezugszeichenReference numerals
1 Ausrückeinheit 12 Endwindung1 release unit 12 end turn
2 Druckgehäuse 13 Abstützfläche2 pressure housing 13 support surface
3 Längsbohrung 14 Abstützfläche3 longitudinal bore 14 support surface
4 Führungshülse 15 Ringschulter4 guide sleeve 15 ring shoulder
5 Druckraum 16 Ringschulter5 pressure chamber 16 ring shoulder
6 Ringkolben 1 7 Umhüllung6 ring pistons 1 7 sheathing
7 Ausrücklager 18 Hülse7 release bearing 18 sleeve
8 Lagerinnenring 19 nicht vergeben8 Inner bearing ring 19 not awarded
9 Lageraußenring 20 Druckfeder9 Bearing outer ring 20 compression spring
10 Druckfeder 21 Kunststoffring10 compression spring 21 plastic ring
1 1 Endwindung 1 1 final turn

Claims

Ansprüche Expectations
1 . Ausrückeinheit (1 ) für eine Kupplung in Kraftfahrzeugen zum wahlweisen Trennen und Verbinden zweier Wellen, bestehend aus einem um eine Antriebs¬ welle oder dergleichen angeordneten Druckgehäuse (2), in dem ein Ringkolben (6) geführt ist, an dessen einen Ende ein Ausrücklager (7) angeordnet ist, wobei sich das Ausrücklager (7) an der Kupplung abstützt und unabhängig von der Stellung des Ausrücklagers (7) dieses von einer Druckfeder (10, 20) beaufschlagt ist, die unmittelbar oder mittelbar zwischen dem Druckgehäuse (2) und einem Lagerinnenring (8) des Ausrücklagers 7 abgestützt ist, dadurch gekennzeichnet, daß der Lagerinnenring (8) und das Druckgehäuse (2) im Bereich der Abstütz¬ flächen (13, 14) zur Lagefixierung der Druckfeder (10, 20), jeweils mit einer axial vorstehenden Ringschulter (15, 16) versehen ist.1 . Disengaging unit (1) for a clutch in motor vehicles for optionally separating and connecting two shafts, consisting of a pressure housing (2) arranged around a drive shaft or the like, in which an annular piston (6) is guided, at one end of which a release bearing ( 7) is arranged, the release bearing (7) being supported on the clutch and irrespective of the position of the release bearing (7), this is acted upon by a compression spring (10, 20) which is directly or indirectly between the pressure housing (2) and a Inner bearing ring (8) of the release bearing 7 is supported, characterized in that the inner bearing ring (8) and the pressure housing (2) in the region of the support surfaces (13, 14) for fixing the position of the compression spring (10, 20), each with an axial projecting annular shoulder (15, 16) is provided.
2. Ausrückeinheit nach Anspruch 1 , dadurch gekennzeichnet, daß die Ring¬ schulter (1 5, 16) jeweils ein Federende der Druckfeder (10, 20) umschließt oder die Druckfeder (10, 20) so angeordnet ist, das diese die Ringschulter (15, 16) außen umgreift.2. disengaging unit according to claim 1, characterized in that the Ring¬ shoulder (1 5, 16) each encloses a spring end of the compression spring (10, 20) or the compression spring (10, 20) is arranged so that it the ring shoulder (15 , 16) encompasses the outside.
3. Ausrückeinheit nach Anspruch 2, dadurch gekennzeichnet, daß zumindest eine Endwindung (1 1 , 12) der Druckfeder (10, 20) mit Übermaß unter einer Vorspannung innenseitig an der Ringschulter (1 5, 16) anliegt oder die Endwin- düng (1 1 , 12) zur Erreichung einer vorgespannten Anlage radial aufgeweitet an einer Mantelfläche der Ringschulter (15, 16) anliegt.3. disengaging unit according to claim 2, characterized in that at least one end turn (1 1, 12) of the compression spring (10, 20) with excess under a prestress on the inside against the annular shoulder (1 5, 16) or the Endwin- fertilizer (1 1, 12) to achieve a prestressed system, radially expanded against an outer surface of the annular shoulder (15, 16).
4. Ausrückeinheit nach Anspruch 2, dadurch gekennzeichnet, daß die Ring¬ schultern (1 5, 16) jeweils ausgehend von einer der Abstützflächen (13, 14) konisch aufweitend oder sich konisch verjüngend gestaltet sind. 4. disengaging unit according to claim 2, characterized in that the Ring¬ shoulders (1 5, 16) each starting from one of the support surfaces (13, 14) are conically widening or tapered.
5. Ausrückeinheit nach dem Oberbegriff von Anspruch 1 , dadurch gekenn¬ zeichnet, daß die Druckfeder (10, 20) allseitig beschichtet und/oder mit einem elastischen Bauteil verbunden bzw. in dieses eingebettet ist.5. disengaging unit according to the preamble of claim 1, characterized gekenn¬ characterized in that the compression spring (10, 20) coated on all sides and / or connected to an elastic component or embedded in this.
6. Ausrückeinheit nach Anspruch 5, dadurch gekennzeichnet, daß die Druckfe¬ der (10) von einer elastischen Umhüllung (17) umgeben ist, die unter Vor¬ spannung außen an der Druckfeder (10) anliegt.6. disengaging unit according to claim 5, characterized in that the Druckfe¬ der (10) is surrounded by an elastic sheath (17) which bears under pretension on the outside of the compression spring (10).
7. Ausrückeinheit nach Anspruch 5, dadurch gekennzeichnet, daß die Druck- feder (10) mit einer innen an den Windungen der Druckfeder (10) vorgespannt anliegenden Hülse (18) versehen ist.7. disengaging unit according to claim 5, characterized in that the compression spring (10) is provided with an inside on the windings of the compression spring (10) biased sleeve (18).
8. Ausrückeinheit nach Anspruch 5, dadurch gekennzeichnet, daß die Druckfe¬ der (20) in einen Kunststoffring (21 ) eingebettet ist.8. disengaging unit according to claim 5, characterized in that the Druckfe¬ the (20) is embedded in a plastic ring (21).
9. Ausrückeinheit nach Anspruch 5, dadurch gekennzeichnet, daß die Druckfe¬ der (10, 20) eine PTFE-Beschichtung aufweist.9. disengaging unit according to claim 5, characterized in that the Druckfe¬ der (10, 20) has a PTFE coating.
10. Ausrückeinheit nach Anspruch 1 oder 5, dadurch gekennzeichnet, daß in die Ausrückeinheit (1 ) eine zylindrische Druckfeder (10) oder eine konisch geformte Druckfeder (20) eingesetzt ist. 10. disengaging unit according to claim 1 or 5, characterized in that in the disengaging unit (1) a cylindrical compression spring (10) or a conically shaped compression spring (20) is used.
PCT/EP1995/005020 1995-05-23 1995-12-19 Vehicle clutch release unit pressure spring WO1996037713A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19581664D DE19581664D2 (en) 1995-05-23 1995-12-19 Pressure spring for a disengaging unit of vehicle clutches
DE19581664A DE19581664C1 (en) 1995-05-23 1995-12-19 Spring assembly for a vehicle clutch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518833A DE19518833A1 (en) 1995-05-23 1995-05-23 Pressure spring for a disengaging unit of vehicle clutches
DE19518833.0 1995-05-23

Publications (1)

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

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DE (2) DE19518833A1 (en)
WO (1) WO1996037713A1 (en)

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FR2772443B1 (en) * 1997-12-11 2001-09-28 Valeo HYDRAULIC CLUTCH CONTROL RECEIVER IN PARTICULAR FOR A MOTOR VEHICLE
US5887692A (en) * 1997-01-10 1999-03-30 Automotive Products (Usa), Inc. Hydraulic pressure cylinder with combined boot and spring
FR2772444B1 (en) * 1997-12-11 2000-06-16 Valeo HYDRAULIC RECEIVER FOR CLUTCH CONTROL, PARTICULARLY FOR MOTOR VEHICLE
FR2780468B1 (en) * 1998-06-30 2000-09-08 Valeo HYDRAULIC RECEIVER, PARTICULARLY A CLUTCH, WITH A LIMITED PISTON TRAVEL
DE19957573A1 (en) * 1998-12-11 2000-06-15 Luk Lamellen & Kupplungsbau Hydraulically operated disengagement mechanism for clutch of motor vehicle has radial sealing ring housed in seal carrier centered on bore wall of gearbox and in installed position aligns with end face of gearbox
DE102005007741B4 (en) * 2005-02-18 2010-11-11 Stabilus Gmbh Piston-cylinder unit with a helical compression spring
DE112006001435C5 (en) * 2005-06-24 2017-05-11 Schaeffler Technologies AG & Co. KG Clutch slave cylinder device with cover
DE102009034399B4 (en) * 2008-08-07 2021-06-24 Schaeffler Technologies AG & Co. KG Actuating unit for a friction clutch
WO2010149129A1 (en) 2009-06-25 2010-12-29 Schaeffler Technologies Gmbh & Co. Kg Release mechanism
DE102011018411B4 (en) * 2010-05-10 2020-03-26 Schaeffler Technologies AG & Co. KG Release to actuate a clutch
WO2013020533A1 (en) * 2011-08-05 2013-02-14 Schaeffler Technologies AG & Co. KG Disengaging system
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DE19518833A1 (en) 1996-11-28

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