WO2018099510A1 - Piston-cylinder assembly, in particular for a clutch actuation device of a vehicle - Google Patents

Piston-cylinder assembly, in particular for a clutch actuation device of a vehicle Download PDF

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Publication number
WO2018099510A1
WO2018099510A1 PCT/DE2017/100972 DE2017100972W WO2018099510A1 WO 2018099510 A1 WO2018099510 A1 WO 2018099510A1 DE 2017100972 W DE2017100972 W DE 2017100972W WO 2018099510 A1 WO2018099510 A1 WO 2018099510A1
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WO
WIPO (PCT)
Prior art keywords
piston
housing
sensor
cylinder
release bearing
Prior art date
Application number
PCT/DE2017/100972
Other languages
German (de)
French (fr)
Inventor
Philippe Wagner
Original Assignee
Schaeffler Technologies AG & 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 & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN201780073760.7A priority Critical patent/CN110023643B/en
Priority to DE112017006025.7T priority patent/DE112017006025A5/en
Publication of WO2018099510A1 publication Critical patent/WO2018099510A1/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
    • 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
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0212—Details of pistons for master or slave cylinders especially adapted for fluid control
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof

Definitions

  • the invention relates to a piston-cylinder arrangement, in particular for a clutch actuation device of a vehicle, consisting of a housing formed as a concentric cylinder, in which a piston is mounted axially movable, wherein the piston engages a release bearing, which actuates an actuator in which a sensor fixedly arranged on the outside of the housing is in operative connection with a sensor target connected to the movable piston.
  • a Gottausschreiber for a hydraulic clutch actuation which has a through-bore housing and a sleeve disposed therein, mounted thereon, on which a clutch operable for coupling ring piston is guided, on which a release bearing Inner ring is fastened.
  • a sensor is mounted on the housing for detecting the axial position of the annular piston, which is associated with a displaceably guided magnetic body, which is connected axially free of play with an annular bearing body attached to the release bearing inner ring for driving through the annular piston.
  • the magnetic body is displaceably guided over its displacement distance to the sensor on the housing and engages with a guide shoe in a circumferential groove of the annular body axially backlash, but radially movable.
  • the disadvantage of this solution is that much radial space is needed.
  • due to the relatively large distance between the magnetic body and a tumbling center a risk of tumbling of the magnetic body is very great.
  • a wobble angle results from the piston-housing clearance. As a result, a tumbling of the magnetic body can not be completely prevented.
  • the invention is based on the object, a piston-cylinder arrangement
  • the object is achieved in that the sensor target is attached directly to the piston. Since there is no need for additional components, such as, for example, the annular body, it is not only installation space which is used to arrange the displacement measuring device. direction is reduced, but in the first place also prevented a tumbling of the sensor target, since the sensor target participates through the direct connection to the piston only the movement of the piston. The suppressed tumbling improves accuracy of the displacement signal of the piston.
  • the piston has a recess for receiving the sensor target. By means of this recess is dispensed with additional space for the sensor target on the piston, so that the dimensions of the piston-cylinder arrangement can be maintained unchanged. The arrangement of the sensor target on the piston is thus possible with structurally different piston-cylinder arrangements.
  • the piston carrying the sensor target is guided in a pressure space defined by an outer pressure wall and a guide sleeve of the housing, and the sensor bears directly against the outer pressure wall. Since the sensor target is attached to the piston so that it faces the sensor disposed on the outer pressure wall, a reliable operative connection between the sensor target and the sensor is established, which allows a very accurate displacement measurement of the piston.
  • the senor mounted on a lead frame is covered on the outer pressure wall with a lid that is firmly fixed to the outer pressure wall.
  • the release bearing and a preload spring are disposed radially inward of the piston and the housing.
  • the preload spring absorbs in particular the release bearing drag torque.
  • the release bearing and the preload spring are disposed radially outward of the piston and the housing, the preload spring being the sensor enclosing bearing housing. This results in a particularly space-saving arrangement.
  • the anti-twist device engages the guide sleeve of the housing, as a result of which the alignment of the sensor target with the sensor is also kept constant.
  • the piston and / or the release bearing are connected to each other axially via at least one latching hook.
  • this connection can be dispensed with an anti-rotation, which reduces the construction cost of the piston-cylinder unit.
  • this is designed as an annular piston, wherein the rotation and the at least one latching hook are an integral part of the annular piston.
  • the piston is integrally formed with anti-rotation and latching hook, eliminating an adjustment of the items, which simplifies the assembly process.
  • the invention allows numerous embodiments. One of them will be explained in more detail with reference to the figures shown in the drawing.
  • FIG. 1 shows a first embodiment of the piston-cylinder according to the invention
  • FIG. 1 shows a first embodiment of the piston-cylinder arrangement according to the invention, in which a cylinder forms a housing 1.
  • the housing 1 consists of an outer pressure wall 2 and a guide sleeve 3, between which a pressure chamber 4 extends, in which an axially movable piston 5 is arranged.
  • the piston 5 is connected to an inner ring 6 of a release bearing 7, which on a not shown coupling of a vehicle during the movement of the piston 5 acts.
  • the release bearing 7 is supported by a preload spring 8.
  • a sensor target 10 is arranged, so that the sensor target 10 of the outer pressure wall 2 of the housing 1 faces.
  • the size and shape of the recess 9 are adapted to the size and shape of the sensor target 10 in such a way that the sensor target 10 inserted in the recess 9 is flush with the piston wall. A survival of the sensor target 10 is thus prevented.
  • a sensor 11 is arranged on a leadframe arrangement 12, which at the same time forms the plug connection to the external connection of the sensor 11.
  • the directly outside on the outer pressure wall 2 resting sensor 1 1 and the lead frame assembly 12 are covered with a lid 13 which is welded to the outer pressure wall 2.
  • FIG. 2 an enlargement of the piston-cylinder arrangement according to FIG. 1 is shown, from which it can be seen that the piston 5 is fastened to the inner ring 6 of the inner release bearing 7 via an axially extending latching hook 15.
  • the piston 3 has a radially outwardly directed anti-rotation lock 14, which acts on the inside of the outer pressure wall 2 and contributes to the positioning of the sensor target 10 relative to the sensor 1 1.
  • FIG 3 shows an exemplary embodiment of the piston 5 designed as an annular piston with the axially formed recess 9 for receiving the sensor target 10 and also the anti-rotation device 14 extending radially on the outer skin of the piston 5, which is formed as a knob.
  • Two locking hooks 15 extend axially to the annular piston 5.
  • the described annular piston 5 is an integral component, which has the latching hook 15, the recess 9 for the sensor target 10 and the nubs of the anti-rotation 14 as an integral part.
  • a second embodiment of the piston-cylinder arrangement according to the invention is shown, in which the release bearing 7 and the preload spring 8 are arranged on the outside of the housing 1.
  • the piston 5 is provided with an anti-rotation 16, which acts on the inner wall of the guide sleeve 3, while in this case the sensor 1 1 rests with the lead frame assembly 12 directly on the outside of the outer pressure wall 2 of the housing 1.
  • the housing 1 carrying the sensor 1 1 is surrounded on the outside by the preload spring 8, which is also in In this case, the drag torque of the release bearing 7 receives.
  • the connector output 17 formed by the lead frame arrangement 12 is arranged below the preload spring 8, the preload spring 8 being surrounded by a bellows 18.
  • the wall thickness of the outer pressure wall 2 is somewhat reduced for receiving the sensor 1 1, whereby the axial positioning of the sensor target 10 to the sensor 1 1 is improved by dispensing with a sealing ring carrier.

Abstract

The invention relates to a piston-cylinder assembly, in particular for a clutch actuation device of a vehicle, consisting of a concentric cylinder which is designed as a housing (1) and in which a piston (5) is mounted in an axially movable manner. The piston (5) engages on a released bearing (7) which actuates an actuator. A sensor (11) which is rigidly arranged on the exterior of the housing (1) is operatively connected to a sensor target (10) which is connected to the movable piston (5). In a piston-cylinder assembly, the sensor target is prevented from undergoing a swaying movement in that the sensor target (10) is directly secured to the piston (5).

Description

Kolben-Zylinder-Anordnunq, insbesondere für eine Kupplungsbetätigungsein- richtung eines Fahrzeuges  Piston-cylinder arrangement, in particular for a Kupplungsbetätigungsein- direction of a vehicle
Die Erfindung betrifft eine Kolben-Zylinder-Anordnung, insbesondere für eine Kupp- lungsbetätigungseinrichtung eines Fahrzeuges, bestehend aus einem als Gehäuse ausgebildeten, konzentrischen Zylinder, in dem ein Kolben axial beweglich gelagert ist, wobei der Kolben an einem Ausrücklager angreift, welches einen Aktuator betätigt, wobei ein außen an dem Gehäuse fest angeordneter Sensor in einer Wirkverbindung mit einem mit dem beweglichen Kolben verbundenen Sensortarget steht. The invention relates to a piston-cylinder arrangement, in particular for a clutch actuation device of a vehicle, consisting of a housing formed as a concentric cylinder, in which a piston is mounted axially movable, wherein the piston engages a release bearing, which actuates an actuator in which a sensor fixedly arranged on the outside of the housing is in operative connection with a sensor target connected to the movable piston.
Aus der EP 1 898 1 1 1 A2 ist ein Zentralausrücker für eine hydraulische Kupplungsbetätigung bekannt, welcher eine Durchgangsbohrung aufweisendes Gehäuse und eine darin angeordnete, daran befestigte Hülse aufweist, auf der ein zur Kupplung wirkver- bindbarer Ringkolben verschiebbar geführt ist, an dem ein Ausrücklager-Innenring be- festigt ist. Hierbei ist zur Erfassung der Axialposition des Ringkolbens ein Sensor am Gehäuse befestigt, dem ein verschiebbar geführter Magnetkörper zugeordnet ist, welcher mit einem am Ausrücklager-Innenring befestigten Ringkörper zur Mitnahme durch den Ringkolben axial spielfrei verbunden ist. Der Magnetkörper ist mit über seinen Verschiebeweg gleichbleibenden Abstand zum Sensor am Gehäuse verschiebbar geführt und greift mit einem Führungsschuh in eine Umfangsnut des Ringkörpers axial spielfrei, aber radial beweglich ein. Nachteilig bei dieser Lösung ist, dass viel radialer Bauraum benötigt wird. Darüber hinaus ist aufgrund des verhältnismäßig großen Ab- standes zwischen dem Magnetkörper und einem Taumelzentrum eines Taumelgefahr des Magnetkörpers sehr groß. Ein Taumelwinkel ergibt sich durch das Kolben- Gehäuse-Spiel. Dadurch kann ein Taumeln des Magnetkörpers nicht vollständig unterbunden werden. From EP 1 898 1 1 1 A2 a Zentralausrücker for a hydraulic clutch actuation is known, which has a through-bore housing and a sleeve disposed therein, mounted thereon, on which a clutch operable for coupling ring piston is guided, on which a release bearing Inner ring is fastened. Here, a sensor is mounted on the housing for detecting the axial position of the annular piston, which is associated with a displaceably guided magnetic body, which is connected axially free of play with an annular bearing body attached to the release bearing inner ring for driving through the annular piston. The magnetic body is displaceably guided over its displacement distance to the sensor on the housing and engages with a guide shoe in a circumferential groove of the annular body axially backlash, but radially movable. The disadvantage of this solution is that much radial space is needed. Moreover, due to the relatively large distance between the magnetic body and a tumbling center, a risk of tumbling of the magnetic body is very great. A wobble angle results from the piston-housing clearance. As a result, a tumbling of the magnetic body can not be completely prevented.
Der Erfindung liegt die Aufgabe zugrunde, eine Kolben-Zylinder-Anordnung The invention is based on the object, a piston-cylinder arrangement
anzugeben, bei welcher die Taumelbewegung des Sensortargets vollständig unterbunden wird. Erfindungsgemäß ist die Aufgabe dadurch gelöst, dass das Sensortarget direkt am Kolben befestigt ist. Da auf zusätzliche Bauelemente, wie beispielsweise den Ringkörper, verzichtet wird, wird nicht nur Bauraum, der zur Anordnung der Wegmessein- richtung benötigt wird, verringert, sondern in erster Linie auch ein Taumeln des Sensortargets unterbunden, da das Sensortarget durch die unmittelbare Anbindung an den Kolben nur die Bewegung des Kolbens mitmacht. Durch das unterbundene Taumeln wird eine Genauigkeit des Wegmesssignals des Kolbens verbessert. Vorteilhafterweise weist der Kolben eine Ausnehmung zur Aufnahme des Sensortargets auf. Mittels dieser Ausnehmung wird auf zusätzlichen Bauraum für das Sensortarget am Kolben verzichtet, so dass die Abmaße der Kolben-Zylinder-Anordnung unverändert aufrechterhalten werden können. Die Anordnung des Sensortargets am Kolben ist somit bei konstruktiv unterschiedlichen Kolben-Zylinder-Anordnungen mög- lieh. indicate, in which the wobbling motion of the sensor target is completely prevented. According to the invention the object is achieved in that the sensor target is attached directly to the piston. Since there is no need for additional components, such as, for example, the annular body, it is not only installation space which is used to arrange the displacement measuring device. direction is reduced, but in the first place also prevented a tumbling of the sensor target, since the sensor target participates through the direct connection to the piston only the movement of the piston. The suppressed tumbling improves accuracy of the displacement signal of the piston. Advantageously, the piston has a recess for receiving the sensor target. By means of this recess is dispensed with additional space for the sensor target on the piston, so that the dimensions of the piston-cylinder arrangement can be maintained unchanged. The arrangement of the sensor target on the piston is thus possible with structurally different piston-cylinder arrangements.
In einer Ausgestaltung ist der das Sensortarget tragende Kolben in einem durch eine Außendruckwandung und eine Führungshülse des Gehäuses aufgespannten Druckraum geführt und der Sensor liegt direkt an der Außendruckwandung an. Da das Sensortarget so an dem Kolben befestigt ist, dass es dem an der Außendruckwandung angeordneten Sensor gegenüberliegt, wird eine zuverlässige Wirkverbindung zwischen Sensortarget und Sensor hergestellt, was eine sehr genaue Wegmessung des Kolbens erlaubt. In one embodiment, the piston carrying the sensor target is guided in a pressure space defined by an outer pressure wall and a guide sleeve of the housing, and the sensor bears directly against the outer pressure wall. Since the sensor target is attached to the piston so that it faces the sensor disposed on the outer pressure wall, a reliable operative connection between the sensor target and the sensor is established, which allows a very accurate displacement measurement of the piston.
In einer Variante ist der auf einem Lead-Frame befestigte Sensor an der Außendruckwandung mit einem stoffschlüssig an der Außendruckwandung fixierten Deckel abgedeckt. Durch diese stoffschlüssig mit der Außendruckwandung verbundene Abdeckung wird eine Verschmutzung des Sensors, insbesondere der Lead-Frame- Anordnung, unterbunden, wodurch die Lebensdauer des Sensors erhöht wird. In one variant, the sensor mounted on a lead frame is covered on the outer pressure wall with a lid that is firmly fixed to the outer pressure wall. By this cohesively connected to the outer pressure wall cover contamination of the sensor, in particular the lead frame arrangement, prevented, whereby the life of the sensor is increased.
In einer Ausführungsform sind das Ausrücklager und eine Vorlastfeder radial innenliegend zum Kolben und dem Gehäuse angeordnet. Die Vorlastfeder nimmt dabei insbe- sondere das Ausrücklagerschleppmoment auf. In one embodiment, the release bearing and a preload spring are disposed radially inward of the piston and the housing. The preload spring absorbs in particular the release bearing drag torque.
In einer Ausgestaltung greift bei dem innenliegenden Ausrücklager eine Verdrehsicherung des Kolbens innen an der Außendruckwandung des Gehäuses an. Mittels einer solchen Verdrehsicherung wird die Ausrichtung des Sensortargets zum Sensor aufrechterhalten, um ein genaues Sensorsignal erzeugen zu können. In einer Alternative sind das Ausrücklager und die Vorlastfeder radial außenliegend zum Kolben und dem Gehäuse angeordnet, wobei die Vorlastfeder das den Sensor tragende Gehäuse umschließt. Dadurch ergibt sich eine besonders bauraumsparende Anordnung. In one embodiment engages in the inner release bearing an anti-rotation of the piston inside the outer pressure wall of the housing. By means of such an anti-rotation device, the alignment of the sensor target with the sensor is maintained in order to generate an accurate sensor signal. In an alternative, the release bearing and the preload spring are disposed radially outward of the piston and the housing, the preload spring being the sensor enclosing bearing housing. This results in a particularly space-saving arrangement.
Vorteilhafterweise greift bei dem außenliegenden Ausrücklager die Verdrehsicherung an der Führungshülse des Gehäuses an, wodurch ebenfalls die Ausrichtung des Sen- sortargets zum Sensor konstant gehalten wird. Advantageously, in the outer release bearing, the anti-twist device engages the guide sleeve of the housing, as a result of which the alignment of the sensor target with the sensor is also kept constant.
In einer Weiterbildung sind der Kolben und/oder das Ausrücklager axial über mindestens einen Rasthaken miteinander verbunden. Bei dieser Verbindung kann auf eine Verdrehsicherung verzichtet werden, was den bautechnischen Aufwand der Kolben- Zylinder-Einheit reduziert. Um einen besonders kostengünstigen Kolben herstellen zu können, ist dieser als Ringkolben ausgebildet, wobei die Verdrehsicherung und der mindestens eine Rasthaken integraler Bestandteil des Ringkolbens sind. Dadurch, dass der Kolben einstückig mit Verdrehsicherung und Rasthaken ausgebildet ist, entfällt eine Justierung der Einzelteile, was den Montageprozess vereinfacht. Die Erfindung lässt zahlreiche Ausführungsformen zu. Eine davon soll anhand der in der Zeichnung dargestellten Figuren näher erläutert werden. In a further development, the piston and / or the release bearing are connected to each other axially via at least one latching hook. In this connection can be dispensed with an anti-rotation, which reduces the construction cost of the piston-cylinder unit. In order to produce a particularly cost-effective piston, this is designed as an annular piston, wherein the rotation and the at least one latching hook are an integral part of the annular piston. Characterized in that the piston is integrally formed with anti-rotation and latching hook, eliminating an adjustment of the items, which simplifies the assembly process. The invention allows numerous embodiments. One of them will be explained in more detail with reference to the figures shown in the drawing.
Es zeigen: Show it:
Fig. 1 ein erstes Ausführungsbeispiel der erfindungsgemäßen Kolben-Zylinder-1 shows a first embodiment of the piston-cylinder according to the invention
Anordnung, Fig. 2 eine Vergrößerung des ersten Ausführungsbeispiels der erfindungsgemäßen Kolben-Zylinder-Anordnung, 2, an enlargement of the first embodiment of the piston-cylinder arrangement according to the invention,
Fig. 3 ein Ausführungsbeispiel eines Ringkolbens, 3 shows an embodiment of an annular piston,
Fig. 4 ein zweites Ausführungsbeispiel der erfindungsgemäßen Kolben-4 shows a second embodiment of the piston according to the invention
Zylinder-Anordnung. Fig. 1 zeigt ein erstes Ausführungsbeispiel der erfindungsgemäßen Kolben-Zylinder- Anordnung, bei welcher ein Zylinder ein Gehäuse 1 bildet. Das Gehäuse 1 besteht aus einer Außendruckwandung 2 und einer Führungshülse 3, zwischen denen sich ein Druckraum 4 erstreckt, in dem axial beweglich ein Kolben 5 angeordnet ist. Der Kolben 5 ist mit einem Innenring 6 eines Ausrücklagers 7 verbunden, welches auf eine nicht weiter dargestellte Kupplung eines Fahrzeuges bei der Bewegung des Kolbens 5 einwirkt. Das Ausrücklager 7 wird von einer Vorlastfeder 8 gestützt. Cylinder arrangement. Fig. 1 shows a first embodiment of the piston-cylinder arrangement according to the invention, in which a cylinder forms a housing 1. The housing 1 consists of an outer pressure wall 2 and a guide sleeve 3, between which a pressure chamber 4 extends, in which an axially movable piston 5 is arranged. The piston 5 is connected to an inner ring 6 of a release bearing 7, which on a not shown coupling of a vehicle during the movement of the piston 5 acts. The release bearing 7 is supported by a preload spring 8.
In einer Ausnehmung 9 des Kolbens 5 ist ein Sensortarget 10 angeordnet, so dass das Sensortarget 10 der Außendruckwandung 2 des Gehäuses 1 zugewandt ist. Grö- ße und Form der Ausnehmung 9 sind dabei so an die GröOe und Form des Sensortargets 10 angepasst, dass das in die Ausnehmung 9 eingelegte Sensortarget 10 mit der Kolbenwand abschließt. Ein Überstehen des Sensortargets 10 wird somit unterbunden. Außen an der Außendruckwandung 2 ist ein Sensor 1 1 auf einer Lead- Frame-Anordnung 12 angeordnet, welche gleichzeitig die Steckverbindung zum ex- ternen Anschluss des Sensors 1 1 bildet. Der direkt außen auf der Außendruckwandung 2 aufliegende Sensor 1 1 und die Lead-Frame-Anordnung 12 sind dabei mit einem Deckel 13 abgedeckt, welcher mit der Außendruckwandung 2 verschweißt ist. In a recess 9 of the piston 5, a sensor target 10 is arranged, so that the sensor target 10 of the outer pressure wall 2 of the housing 1 faces. The size and shape of the recess 9 are adapted to the size and shape of the sensor target 10 in such a way that the sensor target 10 inserted in the recess 9 is flush with the piston wall. A survival of the sensor target 10 is thus prevented. On the outside of the outer pressure wall 2, a sensor 11 is arranged on a leadframe arrangement 12, which at the same time forms the plug connection to the external connection of the sensor 11. The directly outside on the outer pressure wall 2 resting sensor 1 1 and the lead frame assembly 12 are covered with a lid 13 which is welded to the outer pressure wall 2.
In Fig. 2 ist eine Vergrößerung der Kolben-Zylinder-Anordnung nach Fig. 1 dargestellt, aus welcher ersichtlich ist, dass der Kolben 5 über einen sich axial erstreckenden Rasthaken 15 an dem Innenring 6 des innenliegenden Ausrücklagers 7 befestigt ist. Gleichzeitig weist der Kolben 3 eine radial nach außen gerichtete Verdrehsicherung 14 auf, die an der Innenseite der Außendruckwandung 2 angreift und zur Positionierung des Sensortargets 10 gegenüber dem Sensor 1 1 beiträgt. 2, an enlargement of the piston-cylinder arrangement according to FIG. 1 is shown, from which it can be seen that the piston 5 is fastened to the inner ring 6 of the inner release bearing 7 via an axially extending latching hook 15. At the same time, the piston 3 has a radially outwardly directed anti-rotation lock 14, which acts on the inside of the outer pressure wall 2 and contributes to the positioning of the sensor target 10 relative to the sensor 1 1.
Fig. 3 zeigt ein Ausführungsbeispiel des als Ringkolben ausgebildeten Kolbens 5 mit der axial ausgebildeten Ausnehmung 9 zur Aufnahme des Sensortargets 10 und der sich ebenfalls auf der Außenhaut des Kolbens 5 radial erstreckenden Verdrehsicherung 14, welche als Noppe ausgebildet ist. Zwei Rasthaken 15 erstrecken sich axial zum Ringkolben 5. Der beschriebene Ringkolben 5 stellt ein einstückiges Bauteil dar, welches den Rasthaken 15, die Ausnehmung 9 für das Sensortarget 10 und die Nop- pen der Verdrehsicherung 14 als integralen Bestandteil aufweist. 3 shows an exemplary embodiment of the piston 5 designed as an annular piston with the axially formed recess 9 for receiving the sensor target 10 and also the anti-rotation device 14 extending radially on the outer skin of the piston 5, which is formed as a knob. Two locking hooks 15 extend axially to the annular piston 5. The described annular piston 5 is an integral component, which has the latching hook 15, the recess 9 for the sensor target 10 and the nubs of the anti-rotation 14 as an integral part.
In Fig. 4 ist ein zweites Ausführungsbeispiel der erfindungsgemäßen Kolben-Zylinder- Anordnung dargestellt, bei welcher das Ausrücklager 7 und die Vorlastfeder 8 außen am Gehäuse 1 angeordnet sind. Der Kolben 5 ist dabei mit einer Verdrehsicherung 16 versehen, welche an die Innenwandung der Führungshülse 3 angreift, während auch in diesem Fall der Sensor 1 1 mit dem Lead-Frame-Anordnung 12 direkt auf der Außenseite der Außendruckwandung 2 des Gehäuses 1 aufliegt. Das den Sensor 1 1 tragende Gehäuse 1 wird dabei außen von der Vorlastfeder 8 umgeben, die auch in diesem Fall das Schleppmoment des Ausrücklagers 7 aufnimmt. Der durch die Lead- Frame-Anordnung 12 gebildete Steckerausgang 17 ist unterhalb der Vorlastfeder 8 angeordnet, wobei die Vorlastfeder 8 von einem Faltenbalg 18 umgeben ist. Die Wandstärke der Außendruckwandung 2 ist zur Aufnahme des Sensors 1 1 etwas re- duziert, wodurch die axiale Positionierung des Sensortargets 10 zum Sensor 1 1 durch den Verzicht auf einen Dichtringträger verbessert werden. In Fig. 4, a second embodiment of the piston-cylinder arrangement according to the invention is shown, in which the release bearing 7 and the preload spring 8 are arranged on the outside of the housing 1. The piston 5 is provided with an anti-rotation 16, which acts on the inner wall of the guide sleeve 3, while in this case the sensor 1 1 rests with the lead frame assembly 12 directly on the outside of the outer pressure wall 2 of the housing 1. The housing 1 carrying the sensor 1 1 is surrounded on the outside by the preload spring 8, which is also in In this case, the drag torque of the release bearing 7 receives. The connector output 17 formed by the lead frame arrangement 12 is arranged below the preload spring 8, the preload spring 8 being surrounded by a bellows 18. The wall thickness of the outer pressure wall 2 is somewhat reduced for receiving the sensor 1 1, whereby the axial positioning of the sensor target 10 to the sensor 1 1 is improved by dispensing with a sealing ring carrier.
Bezuqszeichenliste Gehäuse Access character list Enclosure
Außendruckwandung Außendruckwandung
Führungshülse guide sleeve
Druckraum pressure chamber
Kolben piston
Innenring inner ring
Ausrücklager release bearing
Vorlastfeder preload
Ausnehmung am Kolben Recess on the piston
Sensortarget sensor target
Sensor sensor
Lead-Frame-Anordnung Lead-frame arrangement
Deckel cover
Verdrehsicherung twist
Rasthaken latch hook
Verdrehsicherung twist
Steckerausgang connector output
Faltenbalg bellow

Claims

Patentansprüche claims
1 . Kolben-Zylinder-Anordnung, insbesondere für eine Kupplungsbetätigungsein- richtung eines Fahrzeuges, bestehend aus einem als Gehäuse (1 ) ausgebildeten, konzentrischen Zylinder, in dem ein Kolben (5) axial beweglich gelagert ist, wobei der Kolben (5) an einem Ausrücklager (7) angreift, welches einen Aktua- tor betätigt, wobei ein außen an dem Gehäuse (1 ) fest angeordneter Sensor (1 1 ) in einer Wirkverbindung mit einem mit dem beweglichen Kolben (5) verbundenen Sensortarget (10) steht, dadurch gekennzeichnet, dass das Sensortarget (10) direkt am Kolben (5) befestigt ist. 1 . Piston-cylinder arrangement, in particular for a clutch actuating device of a vehicle, consisting of a housing (1) formed concentric cylinder in which a piston (5) is mounted axially movable, wherein the piston (5) on a release bearing ( 7) which actuates an actuator, wherein a sensor (11) fixedly arranged on the exterior of the housing (1) is in operative connection with a sensor target (10) connected to the movable piston (5), characterized in that the sensor target (10) is attached directly to the piston (5).
2. Kolben-Zylinder-Anordnung nach Anspruch 1 , dadurch gekennzeichnet, dass der Kolben (5) eine Ausnehmung (9) zur Aufnahme des Sensortargets (10) aufweist. 2. Piston-cylinder arrangement according to claim 1, characterized in that the piston (5) has a recess (9) for receiving the sensor target (10).
3. Kolben-Zylinder-Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der das Sensortarget (10) tragende Kolben (5) in einem durch eine Au- ßendruckwandung (2) und einen Führungszylinder (3) des Gehäuses (1 ) aufgespannten Druckraum (4) geführt ist und der Sensor (1 1 ) direkt außen an der Außendruckwandung (2) anliegt. 3. Piston-cylinder arrangement according to claim 1 or 2, characterized in that the sensor target (10) carrying the piston (5) in a by a Au ßendruckwandung (2) and a guide cylinder (3) of the housing (1) spanned Pressure chamber (4) is guided and the sensor (1 1) directly outside the outer pressure wall (2) is applied.
4. Kolben-Zylinder-Anordnung nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, dass der auf einer Lead-Frame-Anordnung (12) befestigte Sensor (1 1 ) an der Außendruckwandung (2) mit einem stoffschlüssig an der Außendruckwandung (2) fixierten Deckel (13) abgedeckt ist. 4. piston-cylinder assembly according to claim 1, 2 or 3, characterized in that on a lead frame assembly (12) attached to the sensor (1 1) on the outer pressure wall (2) with a cohesively on the outer pressure wall (2 ) fixed lid (13) is covered.
5. Kolben-Zylinder-Anordnung nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ausrücklager (7) und eine Vorlast- feder (8) radial innenliegend zum Kolben (5) und dem Gehäuse (1 ) angeordnet sind. 5. Piston-cylinder arrangement according to at least one of the preceding claims, characterized in that the release bearing (7) and a preload spring (8) radially inwardly of the piston (5) and the housing (1) are arranged.
6. Kolben-Zylinder-Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass bei dem innenliegenden Ausrücklager (8) eine Verdrehsicherung (14) des Kolbens (5) innen an der Außendruckwandung (2) des Gehäuses (1 ) angreift. 6. piston-cylinder assembly according to claim 5, characterized in that at the inner release bearing (8) an anti-rotation (14) of the piston (5) inside the outer pressure wall (2) of the housing (1) engages.
7. Kolben-Zylinder-Anordnung nach mindestens einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Ausrücklager (7) und die Vorlastfeder (8) radial außenliegend zum Kolben (5) und dem Gehäuse (2) angeordnet sind, wobei die Vorlastfeder (8) das den Sensor (1 1 ) tragende Gehäuse (1 ) umschließt. 7. piston-cylinder assembly according to at least one of the preceding claims 1 to 4, characterized in that the release bearing (7) and the preload spring (8) are arranged radially outboard of the piston (5) and the housing (2), wherein the Preload spring (8) enclosing the sensor (1 1) housing (1) encloses.
8. Kolben-Zylinder-Anordnung nach Anspruch 7, dadurch gekennzeichnet, dass bei einem außenliegenden Ausrücklager (8) die Verdrehsicherung (16) an der Führungshülse (3) des Gehäuses (1 ) angreift. 8. piston-cylinder assembly according to claim 7, characterized in that in an outer release bearing (8), the rotation (16) on the guide sleeve (3) of the housing (1) engages.
9. Kolben-Zylinder-Anordnung nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (5) und das Ausrücklager (7) axial über mindestens einen Rasthaken (15) miteinander verbunden sind. 9. piston-cylinder assembly according to at least one of the preceding claims, characterized in that the piston (5) and the release bearing (7) are axially connected to each other via at least one latching hook (15).
10. Kolben-Zylinder-Anordnung nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (5) als Ringkolben ausgebildet ist, wobei die Verdrehsicherung (14, 16) und der mindestens eine Rasthaken (15) integraler Bestandteil des Ringkolbens (5) sind. 10. piston-cylinder assembly according to at least one of the preceding claims, characterized in that the piston (5) is designed as an annular piston, wherein the rotation (14, 16) and the at least one latching hook (15) integral part of the annular piston (5 ) are.
PCT/DE2017/100972 2016-11-29 2017-11-15 Piston-cylinder assembly, in particular for a clutch actuation device of a vehicle WO2018099510A1 (en)

Priority Applications (2)

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CN201780073760.7A CN110023643B (en) 2016-11-29 2017-11-15 Piston cylinder assembly, in particular for a vehicle clutch actuation device
DE112017006025.7T DE112017006025A5 (en) 2016-11-29 2017-11-15 Piston-cylinder arrangement, in particular for a clutch actuator of a vehicle

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DE102016223608.3 2016-11-29
DE102016223608.3A DE102016223608A1 (en) 2016-11-29 2016-11-29 Piston-cylinder arrangement, in particular for a clutch actuator of a vehicle

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DE102020119185A1 (en) 2020-07-21 2022-01-27 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clutch device for a manual transmission of a utility vehicle

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DE112017006025A5 (en) 2019-08-29

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