WO2014079445A1 - Piston doté d'un élément de détection et ensemble piston-cylindre - Google Patents

Piston doté d'un élément de détection et ensemble piston-cylindre Download PDF

Info

Publication number
WO2014079445A1
WO2014079445A1 PCT/DE2013/200315 DE2013200315W WO2014079445A1 WO 2014079445 A1 WO2014079445 A1 WO 2014079445A1 DE 2013200315 W DE2013200315 W DE 2013200315W WO 2014079445 A1 WO2014079445 A1 WO 2014079445A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
sensor element
cap
sealing ring
cylinder
Prior art date
Application number
PCT/DE2013/200315
Other languages
German (de)
English (en)
Inventor
Jean-Philippe Müller
Jürgen Seifermann
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 DE112013005654.2T priority Critical patent/DE112013005654A5/de
Publication of WO2014079445A1 publication Critical patent/WO2014079445A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
    • 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
    • F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
    • 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
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84
    • 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 with a sensor element, in particular for a donor or slave cylinder of a pressure medium actuating device, wherein the piston carrying the sensor element has a substantially cylindrical wall with two opposite end faces and a piston-cylinder arrangement.
  • sensor systems are used to detect the position of a piston which is guided in a cylinder. Depending on the position of the piston, the clutch of the motor vehicle is actuated.
  • a sensor element On the piston, a sensor element is arranged, which faces a sensor arrangement which is attached to the cylinder, wherein the sensor arrangement detects a change in the path of the piston due to the displacement of the sensor element.
  • the electrically conductive sensor element slides past the inductively effective sensor arrangement, wherein the sensor element dips into the magnetic field of the inductive sensor arrangement and changes it. The changed magnetic field is a measure of which way the piston has swept over.
  • the sensor element is usually designed as a ring, which is preferably mounted on the front side of the piston.
  • the attachment takes place by means of a snap connection to a support element.
  • the positioning of the sensor element as a complete ring is possible only in the region of an end face of the piston, since the sensor element must dive together with the piston in a pressure chamber of a clutch master cylinder. If the sensor element must be mounted on the piston between the two end faces of the piston (preferably between a primary and a secondary seal) for reasons of tree space, this is only possible by means of a slotted target ring or a segment target.
  • the sensor elements formed in this way must then be fastened by an additional process, such as caulking, forming or gluing.
  • the invention is therefore based on the object to provide a piston and a piston-cylinder arrangement in which a simple and inexpensive installation of the sensor element on the piston is made possible.
  • the object is achieved in that the cap-like sensor element is placed over one of the end faces on the piston. Due to this cap-like design, the sensor element takes up little space and can be attached to the piston with only a single assembly step. Thus, a cost-effective piston arrangement is achieved, in which the sensor element has the smallest possible distance from the sensor arrangement.
  • This frontal arrangement allows a simple overlap of the cap-like sensor element on the end face of the piston, which is a simple assembly step.
  • the cap-like sensor element contacts not only the end face of the piston, but also partially the cylindrical circumference of the piston.
  • an end face of the cap-like sensor element is axially fixed by a sealing ring carrier on the end face of the piston, wherein the sealing ring carrier engages through the end face of the cap-like sensor element into the piston. Since the sealing ring carrier presses the end face of the cap-like sensor element against the end face of the piston, the play of the cap-like sensor element in the axial direction is reduced or completely prevented, which has a positive effect on the accuracy of the sensor signal of the sensor arrangement.
  • the cap-like sensor element has an opening in its end face for receiving the sealing ring carrier, the area of the cap-like sensor element forming the opening being connected in a force-locking manner radially to the sealing ring carrier.
  • a press fit on the sealing ring carrier represents a simple assembly step. Additional mounting steps, such as the gluing of the sensor element, can be dispensed with. This reduces the manufacturing cost of the piston.
  • a positive and / or a material connection are conceivable.
  • Plug-in connection through the opening engages in the piston and is anchored in this.
  • the lateral formation of lugs on the part engaging in the piston the sealing ring carrier leads to a tension of the sealing ring carrier within the piston and thus to a fixed positioning of the cap-like sensor element in the axial direction.
  • At least one seal arranged on the sealing ring carrier is supported axially on the cap-like sensor element.
  • the seal against the cap-like sensor element is arranged.
  • the cap-like sensor element is non-positively connected in its circumferential direction with the piston. Also in this case, alternatively, a positive and / or cohesive connection is conceivable. Since the cap-like sensor element is designed rotationally symmetrically without interruption, can be dispensed with an anti-rotation of piston in the cylinder as well as an oriented assembly, which further reduces the cost of the assembly process. Additional components for the attachment of the cap-like sensor element are not needed.
  • At least one axial tuning rib is formed on the piston. This tuning rib contributes to the dimensional stability and / or the frictional connection of the cap-like sensor element on the piston and allows the use of cap-like sensor elements with a particularly small wall thickness, which are preferably made of aluminum.
  • At least one radial tuning rib is provided on the piston.
  • a radial tuning rib advantageously contributes to the maintenance of a cylindrical shape of the cap in its circumference, wherein in addition to the dimensional stability and a frictional connection of the cap-like sensor element is set on the piston.
  • an insertion aid is formed on the end face of the piston, the cap opposite. This oblique or rounded insertion aid allows easy mounting of the cap-like sensor element on the piston.
  • a development of the invention relates to a piston-cylinder arrangement, in particular for use in a clutch actuation system in a motor vehicle, with a piston which is arranged axially movable inside the cylinder designed as a housing and a sensor system including a sensor element mounted on the piston and a sensor assembly positioned on the cylinder.
  • the piston is designed according to one of the features of this patent application.
  • a piston-cylinder arrangement is achieved in which the radial clearance between the sensor element and the sensor arrangement is reduced.
  • This frontal arrangement allows a simple overlap of the cap-like sensor element on the end face of the piston, which is a simple assembly step.
  • the cap-like sensor element is arranged on the sealing ring carrier fastened to the piston or another fastening element such as a screw or a rivet.
  • Figure 1 Schematic representation of an electro-hydraulic clutch actuation system
  • FIG. 2 shows a cross section through an exemplary embodiment of a piston according to FIG. 1
  • Figure 3 a perspective view of the piston
  • Figure 4 a perspective view of a cap-like sensor element
  • Figure 5 a perspective view of the piston with Abstimmrippen
  • FIG. 1 shows an electrohydraulic clutch actuation system 1 as used in motor vehicles.
  • a clutch actuation system 1 has an electro-hydraulic actuation system in the form of a clutch master cylinder which comprises a cylinder 2 embodied as a housing, in which a piston 3 is mounted so as to be axially movable.
  • the piston 3 is driven by an electrically commutated electric motor 4, which is controlled by a control unit 5 via an output stage 6.
  • the output stage 6 is fastened to the cylinder 2 together with the electric motor 4.
  • the radial movement of the electric motor 4 is converted via a gear 7 into the axial movement of the piston 3.
  • the piston 3 can also be connected directly waiving the electric motor 4 with the accelerator pedal of the driver of the motor vehicle.
  • the clutch master cylinder 2, 3 is connected to a slave cylinder 9, which actuates a clutch 10.
  • the adjustment of the position of the clutch 10 is due to the drive of the piston 3 by the electric motor 4.
  • the clutch master cylinder 2, 3 and the clutch 10 to the slave cylinder 9 are arranged spatially separated in the motor vehicle.
  • a coil assembly supporting sensor assembly 1 1 is arranged outside of the serving as a housing cylinder 2, a, not shown.
  • This coil arrangement is an electrically conductive sensor element 12, preferably an aluminum target, opposite, which is pulled over the end face of the piston 3.
  • the electrically conductive sensor element 12 is designed like a cap.
  • the cap-like sensor element 12 is shown in Figure 2, where it is placed over an end face on the approximately cylindrical piston 3 formed.
  • rib-like elements 13.2 are formed, which press the sealing ring carrier 13 with the piston 3. During this compression, the cap-like sensor element 12 is pressed in the axial direction against the end face of the piston 3.
  • the sealing ring carrier 13 opposite side of the cylinder-like piston 3, a secondary seal 15 is attached.
  • the primary seals 14 are used to seal the piston 3 against a hydraulic fluid, wherein the primary seal 14 is pressed by the hydraulic fluid against the cap-like sensor element 12.
  • the secondary seal 15 closes the piston 3 against the environment of the clutch actuation system 1.
  • the position n ist of the sensor element 12 also done by press fitting on the sealing ring carrier 13, where the opening 12.1 forming region 12.3 of the cap-like sensor element 12 is pressed radially against the sealing ring carrier 13.
  • the primary seals 14 are supported axially on the sensor element 12.
  • Figure 3 shows a perspective arrangement of the piston 3, over which the sensor element 12 is pushed, wherein the sealing ring carrier 13 forms the conclusion of this arrangement.
  • the arranged on the sealing ring carrier 13 primary seals 14 are arranged in the assembled state between the sensor element 12 and the sealing ring carrier 13.
  • FIG. 4 shows a perspective view of the cap-like sensor element 12 from different directions. It can be seen that the diameter of the cap-like sensor element 12 is approximately equal to the diameter of the piston 3, whereby it can be placed approximately free of play on the piston 3.
  • this has axially extending tuning ribs 16.
  • These axial tuning ribs 16 are arranged distributed around the circumference of the piston 3 and stabilize the made of a very thin aluminum layer cap-like sensor element 12 in shape.
  • the piston 3 may also have radial tuning ribs not shown. Such radial tuning ribs may be formed distributed over the entire surface of the piston 3.
  • An insertion aid 18 in the form of an insertion bevel is then formed on the end face 17 of the piston 3, in order to simplify the assembly or pushing on of the cap-like sensor element 12 on the piston 3.
  • the existing aluminum cap-like sensor element 12 is easy to produce as a deep-drawn part, which is particularly cost.
  • the insertion bevel 18 can be provided as a phase or radius, while the edges of the cap-like sensor element 12 are defined so that a scraping of particles is largely avoided.
  • cap-like sensor element 12 can be used on the front side of the piston 3 varied, which inductive sensor assemblies 1 1 can be used in a clutch actuation system 1.
  • An additional component or an additional process for attaching the cap-shaped sensor element 12 is eliminated, whereby the assembly is made very simple.
  • the cap-like Sensor element 12 are placed together with the primary seals 14 and the sealing ring carrier 13 in one step on the piston 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

L'invention concerne un piston (3) doté d'un élément de détection (12), en particulier pour un cylindre émetteur ou récepteur d'un dispositif d'actionnement de milieu sous pression. Le piston (3) portant l'élément de détection (12) comprend une paroi sensiblement cylindrique pourvue de deux faces frontales opposées. Pour faciliter le montage d'un tel ensemble piston-cylindre, l'élément de détection (12) conçu sous la forme d'un capuchon est placé sur le piston (3) par une des faces frontales.
PCT/DE2013/200315 2012-11-23 2013-11-21 Piston doté d'un élément de détection et ensemble piston-cylindre WO2014079445A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112013005654.2T DE112013005654A5 (de) 2012-11-23 2013-11-21 Kolben mit einem Sensorelement und eine Kolben-Zylinder-Anordnung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012221475 2012-11-23
DE102012221475.5 2012-11-23

Publications (1)

Publication Number Publication Date
WO2014079445A1 true WO2014079445A1 (fr) 2014-05-30

Family

ID=50002389

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2013/200315 WO2014079445A1 (fr) 2012-11-23 2013-11-21 Piston doté d'un élément de détection et ensemble piston-cylindre

Country Status (2)

Country Link
DE (2) DE112013005654A5 (fr)
WO (1) WO2014079445A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015192843A1 (fr) * 2014-06-16 2015-12-23 Schaeffler Technologies AG & Co. KG Maître-cylindre destiné à un système de débrayage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014211887A1 (de) 2014-06-20 2015-12-24 Schaeffler Technologies AG & Co. KG Kolben-Zylinder Anordnung, insbesondere für eine Kupplungsbetätigungsvorrichtung
DE102014218400A1 (de) * 2014-09-15 2016-03-17 Schaeffler Technologies AG & Co. KG Druckmittelbetätigungszylinder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395677A (fr) * 1964-03-02 1965-04-16 Dba Sa Maître-cylindre
DE20208568U1 (de) * 2002-06-03 2002-08-29 Fte Automotive Gmbh Hydraulikzylinder
EP1391615A2 (fr) * 2002-08-22 2004-02-25 ZF Sachs AG Unité de piston-cylindre
DE10323797A1 (de) * 2003-05-23 2004-12-30 Zf Sachs Ag Kolben-Zylinder-Aggregat mit einem Sensorsystem
DE102008057107A1 (de) * 2007-11-19 2009-05-20 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Wegmesssystem für ein Kupplungsausrücksystem
DE102011087103A1 (de) * 2010-12-22 2012-06-28 Schaeffler Technologies Gmbh & Co. Kg Geberzylinder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395677A (fr) * 1964-03-02 1965-04-16 Dba Sa Maître-cylindre
DE20208568U1 (de) * 2002-06-03 2002-08-29 Fte Automotive Gmbh Hydraulikzylinder
EP1391615A2 (fr) * 2002-08-22 2004-02-25 ZF Sachs AG Unité de piston-cylindre
DE10323797A1 (de) * 2003-05-23 2004-12-30 Zf Sachs Ag Kolben-Zylinder-Aggregat mit einem Sensorsystem
DE102008057107A1 (de) * 2007-11-19 2009-05-20 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Wegmesssystem für ein Kupplungsausrücksystem
DE102011087103A1 (de) * 2010-12-22 2012-06-28 Schaeffler Technologies Gmbh & Co. Kg Geberzylinder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015192843A1 (fr) * 2014-06-16 2015-12-23 Schaeffler Technologies AG & Co. KG Maître-cylindre destiné à un système de débrayage
CN106460961A (zh) * 2014-06-16 2017-02-22 舍弗勒技术股份两合公司 用于离合器分离系统的主动缸
CN106460961B (zh) * 2014-06-16 2019-02-22 舍弗勒技术股份两合公司 用于离合器分离系统的主动缸

Also Published As

Publication number Publication date
DE112013005654A5 (de) 2015-08-13
DE102013223763A1 (de) 2014-05-28

Similar Documents

Publication Publication Date Title
EP3175150B1 (fr) Dispositif d'actionnement hydraulique ou pneumatique pour actionner des actionneurs dans une boîte de vitesse de véhicule automobile
EP2885551B1 (fr) Dispositif de débrayage pour l'actionnement hydraulique d'un embrayage
EP2379894B1 (fr) Dispositif de reduction des impulsions de pression
EP1666752B1 (fr) Cylindre hydraulique, en particulier cylindre récepteur pour actionnement hydraulique d'embrayage de véhicules
DE102010039916A1 (de) Lineareinheit
EP2882975B1 (fr) Dispositif à piston-cylindre, en particulier pour un système d'actionnement d'embrayage dans un véhicule automobile
DE102008034300A1 (de) Fahrzeugscheibenbremse
DE102008063752A1 (de) Kolbenstangenanbindung
EP3074664A1 (fr) Unité d'entraînement à broche
WO2014079445A1 (fr) Piston doté d'un élément de détection et ensemble piston-cylindre
EP2431627B1 (fr) Frein à disque avec joint d'étanchéité
DE102011100903B4 (de) Hydraulisches Kupplungs- oder Bremsbetätigungssystem
EP1666753B1 (fr) Cylindre hydraulique, en particulier cylindre émetteur pour actionnement hydraulique d'embrayage de véhicules
EP3177844B1 (fr) Maître-cylindre comprenant une douille de guidage pour une lèvre d'étanchéité du système de dilatation
WO2012089186A2 (fr) Cylindre capteur
WO2015192843A1 (fr) Maître-cylindre destiné à un système de débrayage
DE102012223736A1 (de) Kolben-Zylinder-Anordnung, insbesondere zur Verwendung in einem Kupplungsbetätigungssystem in einem Kraftfahrzeug
EP3447327B1 (fr) Dispositif récepteur de frein sur jantes pour un frein hydraulique sur jante de bicyclette et frein hydraulique sur jante de bicyclette
DE102017119264B4 (de) Nockenwellenversteller mit Dichtung zwischen Außendeckel und Stator
EP2835548A1 (fr) Agencement d'embrayage, notamment pour un embrayage à friction dans un système de débrayage d'un véhicule automobile
DE102010049927A1 (de) Kupplungsbetätigungssystem für eine Doppelkupplung
WO2015124348A1 (fr) Piston flottant pour amortisseur de vibrations
EP3390175B1 (fr) Guide de piston dans un couvercle de boîtier, et usage d'un tel couvercle de boîtier dans un soupape pneumatique de freinage
WO2015120853A1 (fr) Dispositif piston-cylindre, notamment cylindre émetteur d'un système d'actionnement d'embrayage dans un véhicule à moteur
EP2350460A1 (fr) Groupe hydraulique comprenant un réservoir

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13824300

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 1120130056542

Country of ref document: DE

Ref document number: 112013005654

Country of ref document: DE

REG Reference to national code

Ref country code: DE

Ref legal event code: R225

Ref document number: 112013005654

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13824300

Country of ref document: EP

Kind code of ref document: A1