WO2017050330A1 - Maître-cylindre d'embrayage comportant des éléments d'étanchéité imbriqués radialement, embrayage (double) équipé d'un tel maître-cylindre d'embrayage et transmission - Google Patents

Maître-cylindre d'embrayage comportant des éléments d'étanchéité imbriqués radialement, embrayage (double) équipé d'un tel maître-cylindre d'embrayage et transmission Download PDF

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Publication number
WO2017050330A1
WO2017050330A1 PCT/DE2016/200424 DE2016200424W WO2017050330A1 WO 2017050330 A1 WO2017050330 A1 WO 2017050330A1 DE 2016200424 W DE2016200424 W DE 2016200424W WO 2017050330 A1 WO2017050330 A1 WO 2017050330A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
clutch
seal
seals
housing
Prior art date
Application number
PCT/DE2016/200424
Other languages
German (de)
English (en)
Inventor
Julien Oster
Thomas Niesen
Jérémy Keller
Kirill PROKHOROV
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 EP16775460.5A priority Critical patent/EP3353443A1/fr
Priority to DE112016004328.7T priority patent/DE112016004328A5/de
Priority to CN201680053398.2A priority patent/CN108026985B/zh
Publication of WO2017050330A1 publication Critical patent/WO2017050330A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • 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
    • F16D2048/0215—Control by fluid pressure for damping of pulsations within the fluid system
    • 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

Definitions

  • the invention relates to a clutch transmitter for a (double / single) clutch of a motor vehicle, such as a car, a truck or other commercial vehicle, with an attachable to a mechanical actuator piston, at least axially movable in a housing back and is mounted movable, wherein the piston adjoins a size-changing during movement of the high-pressure chamber, further between the piston and the housing preferably two separate voneinan- separate seals are present, one of which as a primary seal the high pressure chamber prepared for receiving hydraulic fluid seals fluid-tight.
  • clutch master cylinder or clutch master can be divided into two categories, namely in such coupling, in which seals are mounted in the housing, so standing seals are used, and on the other hand, those in which the seals are arranged relatively movable, eg. are fixed to the piston.
  • a hydraulic system with upright seals is known.
  • the system disclosed therein comprises a master cylinder with a housing and a piston arranged axially displaceably in it.
  • the piston limits a filled with a hydraulic fluid pressure chamber.
  • the piston Upon actuation of the master cylinder by means of a piston rod acting on the piston, the piston is displaced axially, whereby the hydraulic fluid is pressurized.
  • Between the housing and the piston at least one sealant is arranged.
  • the piston is made of a thermosetting plastic.
  • two seals are used, which are mounted in the housing. On the one hand a primary seal and on the other hand a secondary seal is used. The primary seal and the secondary seal are arranged in a substantially cylindrical rear housing part of the housing.
  • a characteristic of a sender with standing seals is that the seals are fixed on the housing, i. are attached. A sealing lip of the respective seal is in contact with the moving piston and is stuck when the CMC is actuated. Since the piston is made of materials that are optimized for sliding and noise, usually made of a polymer material such as duroplastic, this type of master cylinder shows extremely favorable behavior in terms of friction and noise.
  • such an optimized piston material allows the use of, for example, ethylene-propylene-diene rubber (EPDM) as the sealing material.
  • EPDM ethylene-propylene-diene rubber
  • this material offers advantages in terms of media compatibility with different fluids, such as different brake fluids.
  • encoders with moving seals are also known. Characteristic for a transmitter with moving seals here is that the seals are fixed / fastened on the piston. Their sealing lips are in contact with the housing and move along the housing wall when the CMC is actuated with the piston and seal dynamically to the environment. It is advantageous to use the two seals differently, namely as a primary and secondary seal.
  • This arrangement of a primary seal has the great advantage that reduces the pressurized surface of the housing during actuation. This allows the CMC to realize a low volume uptake. Also, such a clutch encoder / clutch master cylinder is inexpensive to produce. Furthermore, a resulting from the internal pressure occurring in the high-pressure chamber expansion of the housing during operation is minimized, since the high-pressure space reduced by the retraction of the piston into the housing and the movable primary seal is tracked, whereby a smaller and smaller area of the housing is exposed to the high internal pressure. This is basically understood by a low volume intake. In addition to the disadvantages mentioned, however, the existing two concepts also have other disadvantages.
  • the aim of the new development is, inter alia, to develop a novel sealing arrangement that limits the noise level upwards, ensures the sealing function with different brake fluids over the lifetime, especially in terms of media compatibility, and ensures low volume consumption. It could also be briefly summarized that the advantages of the two known solutions, without combining the known disadvantages is the goal, in particular a robust one Design with low noise emission at the same time, high media compatibility and low volume consumption at the same time.
  • one seal is the primary seal and the other seal is formed as a secondary seal.
  • the secondary seal is not designed to seal against high pressure, but only to seal against low pressure, such as ambient (air) pressure +/- (15% to) 20% designed / prepared / dimensioned. In this way, a particularly dense system can be achieved and leakage can be avoided.
  • the primary seal and / or the secondary seal are fixedly mounted on the housing and slidably abut the surface of the piston, such as with (each) a sealing lip ,
  • the two seals are arranged concentrically to each other. It is also advantageous if the housing and the piston, and a closure sleeve are arranged concentrically in addition to the two seals, in particular to these seals are arranged concentrically.
  • the piston is designed as an annular piston with an inner surface and an outer circumferential surface, wherein one of the seals on the inner surface and one of the seals on the outer circumferential surface sealingly abuts, such as with an elastic sealing lip or a Dichtkuppe.
  • the primary seal is made of a reinforcement of the sealing material in comparison less elastic material, such as metal or plastic, held in the form and / or position.
  • the elastic mate- rial of the primary seal can be positively and / or non-positively attached to the reinforcement.
  • the piston is guided to be retractable in a secondary space formed by a double wall of the housing.
  • Such a clutch encoder then builds particularly short in the axial direction.
  • the piston is made of plastic, such as a thermoset, molded / formed / procured.
  • plastic such as a thermoset, molded / formed / procured.
  • a tough or less brittle material can be used, or a treatment of the piston to make the piston less brittle.
  • the internal pressure acting on the housing can be reduced.
  • the lifetime increases among other things.
  • the high-pressure chamber on the one hand by a wall and a bottom of the piston and on the other hand by a plug and / or the housing, and the primary seal is completed / limited. It is expedient if the wall / wall has a constant thickness in the axial direction and / or in the circumferential direction.
  • An advantageous exemplary embodiment is characterized in that the high-pressure space is arranged / positioned between a secondary pressure area or a fluid outlet and the actuating element. In order to use the space optimally, it is advantageous if, in the actuated state of the clutch transmitter, the high-pressure chamber is present or arranged predominantly or completely (almost) within the housing.
  • Bleeding and filling / topping up can be reached skilfully if a secondary suction and bleeding pipe leads away / goes off / branches off from the secondary pressure area.
  • admission pressure valve is designed as an "anti-vibration unit” (AVU) or “tingling filter”, different from a peak torque limiter (PTL), in order to dampen vibrations.
  • AAU anti-vibration unit
  • PTL peak torque limiter
  • the invention ultimately also relates to a clutch, such as a single or double clutch for a drive train of a motor vehicle, with a clutch transmitter according to the invention.
  • the CMC In the foreground of the invention therefore is a seal assembly in the master cylinder.
  • the construction of the CMC is based on two main features.
  • the two seals ie the primary seal and the secondary seal, are installed vertically and concentrically in the housing. In particular, they are concentric with each other and arranged to the piston and the housing.
  • the primary seal sits in the interior of the piston and seals the high-pressure chamber.
  • the secondary seal contacts the outer surface of the piston and seals against the environment.
  • the piston is designed as an annular piston and consists of sliding and friction-optimized material, for example. Plastic such as thermosetting plastic.
  • the inner area acts as a "moving" pressure chamber and seals against the high pressure with the aid of the primary seal, which allows for low volume absorption Leakage of the operating medium, such as a brake fluid, to the outside, especially in the environment, is avoided.
  • the design has the following features:
  • the piston is designed as an annular piston.
  • the interior of the piston serves as a high pressure space, i.
  • the piston is loaded from the inside to pressure.
  • the outside area is used as a contact surface for the secondary seal.
  • the seal is guided through a reinforcement and centered. This has the advantage that the piston moves backlash to the primary seal.
  • the primary seal sits statically in / on the housing.
  • the dynamic side / sealing lip of the seal seals against the piston.
  • the secondary seal also sits statically in / on the housing and concentric with the primary seal.
  • a piston which is designed as an annular piston.
  • This piston is made of duroplastic.
  • the primary seal sits on a housing extension located inside the ring piston.
  • the secondary seal is located concentrically outside the primary seal within the housing and seals towards the piston.
  • the interior of the piston thus serves as a movable pressure chamber.
  • a noise-optimized slave cylinder with concentric primary and secondary seal is the result.
  • Fig. 1 shows a coupling sensor according to the invention in only partially gezeem
  • FIG. 2 shows the clutch transmitter of Fig. 1, but with the piston actuated in one
  • Fig. 3 shows a variant of a clutch sender, with inserted pre-pressure valve / anti-vibration unit (AVU) / Kribbelfilter, and
  • FIG. 4 shows an enlargement of the region IV from FIG. 3.
  • the figures are in part merely schematic in nature and are only for understanding the invention.
  • the figures relate to longitudinal sections, ie those sections which run along the longitudinal axis through the coupling transmitter, in particular along a rotation axis through the piston.
  • Identical elements are provided with the same reference numerals.
  • the features of the individual embodiments can also be combined with each other. So they are interchangeable.
  • FIG. 1 an inventive coupling sensor 1 is shown.
  • the clutch encoder 1 is used in a single or double clutch. It is for use in a motor vehicle, such as a car, a truck or other commercial vehicle intended.
  • the clutch encoder 1 is connected to a mechanical actuator 2, such as a rod 3.
  • the rod 3 is surrounded by a bellows 4.
  • the rod 3 is connected to a piston 5.
  • the piston 5 is mounted axially movable in a housing 6. Inside the piston 5, a high-pressure chamber 7 is present.
  • the piston 5 is designed as an annular piston and has a bottom 8 and a cylindrical wall 9. Between the piston 5 and the housing 6, two seals 10 are present.
  • the one seal 10 is a primary seal 1 1.
  • the other seal 10 is a secondary seal 12.
  • the primary seal 1 1 is made of elastic material, as well as the secondary seal 12. For the two seals 10, the same material can be used. At least the primary seal 1 1 is flanked by a reinforcement 13 and supported.
  • the high pressure space 7 is filled with hydraulic fluid, such as a liquid, such as oil, in particular mineral oil or a brake fluid.
  • hydraulic fluid such as a liquid, such as oil, in particular mineral oil or a brake fluid.
  • the clutch transmitter 1 can also be referred to as a brake transmitter. Of course, the use as a clutch or brake is possible.
  • the piston is surrounded by a closure sleeve 14.
  • the closure sleeve 14 engages in an undercut region 15 of the housing 6.
  • a collar 16 of the closure sleeve 14 engages behind the undercut region 15 or engages in this.
  • the housing 6 has a double wall region 17.
  • the double wall region 17 is formed as a nozzle 18, in which the piston 5 end facing a through hole 19 is introduced, in which a plug 20 is inserted.
  • the plug 20 in turn has a passage opening 21. Through this passage opening 21, high-pressure fluid can pass through and cause an adjusting movement of another component.
  • the housing 6 with the nozzle 18 defines an annular gap region 22 which is in fluid communication with a suction and vent pipe 23.
  • the two seals 10 each have sealing lips 24.
  • the annular gap region 22 also defines a secondary pressure region 25.
  • the piston 5 is made of duroplastic
  • the housing is made of polyamide, in particular of PA66 with or without a glass fiber reinforcement. When using a glass fiber reinforcement, the weight percentage is 35% or 43%. From the same or similar material, the closure sleeve 14 is made. There are also retaining clips used.
  • a prefilter / Kribbelfilters / anti-vibration unit (AVU) 26 between see the outlet end of the housing 6 and the piston 5 is shown in Figs. 3 and 4 shown. Although there is no more plug 20 available, but additionally usable. This component acts as a damper element that dampens vibrations 6.
  • the thickness of the wall 9 of the piston 5 is marked with the reference numeral 27.
  • the thickness is constant in the axial and radial directions.
  • the fluid outlet is also marked with the reference numeral 28.

Landscapes

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

Abstract

L'invention concerne un maître-cylindre d'embrayage (1) pour un embrayage d'un véhicule à moteur, comprenant un piston (5) pouvant être monté sur un actionneur mécanique (2) et pouvant effectuer un mouvement de va-et-vient au moins dans le sens axial dans un carter (6), ledit piston (5) étant adjacent à une chambre haute pression (7) faisant varier la taille de ce dernier lors du déplacement. Entre le piston (5) et le carter (6) sont disposés deux éléments d'étanchéité (10) dont l'un, en tant qu'élément d'étanchéité primaire (11), assure l'étanchéité au fluide de la chambre haute pression (7) conçue pour recevoir un fluide hydraulique, l'un des éléments d'étanchéité (10) étant agencé radialement à l'intérieur de l'autre élément d'étanchéité (10). La présente invention concerne en outre un embrayage équipé d'un tel maître-cylindre d'embrayage (1).
PCT/DE2016/200424 2015-09-25 2016-09-07 Maître-cylindre d'embrayage comportant des éléments d'étanchéité imbriqués radialement, embrayage (double) équipé d'un tel maître-cylindre d'embrayage et transmission WO2017050330A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16775460.5A EP3353443A1 (fr) 2015-09-25 2016-09-07 Maître-cylindre d'embrayage comportant des éléments d'étanchéité imbriqués radialement, embrayage (double) équipé d'un tel maître-cylindre d'embrayage et transmission
DE112016004328.7T DE112016004328A5 (de) 2015-09-25 2016-09-07 Kupplungsgeber mit radial geschachtelten Dichtungen, (Doppel-)Kupplung mit Kupplungsgeber undAntriebstrang
CN201680053398.2A CN108026985B (zh) 2015-09-25 2016-09-07 具有径向嵌套的密封装置的离合器主动装置、具有离合器主动装置的(双)离合器和驱动系

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015218498 2015-09-25
DE102015218498.6 2015-09-25

Publications (1)

Publication Number Publication Date
WO2017050330A1 true WO2017050330A1 (fr) 2017-03-30

Family

ID=57067901

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2016/200424 WO2017050330A1 (fr) 2015-09-25 2016-09-07 Maître-cylindre d'embrayage comportant des éléments d'étanchéité imbriqués radialement, embrayage (double) équipé d'un tel maître-cylindre d'embrayage et transmission

Country Status (4)

Country Link
EP (1) EP3353443A1 (fr)
CN (1) CN108026985B (fr)
DE (2) DE102016216987A1 (fr)
WO (1) WO2017050330A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019237358A1 (fr) * 2018-06-15 2019-12-19 舍弗勒技术股份两合公司 Cylindre récepteur concentrique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327437A1 (de) 2002-06-24 2004-01-22 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulisches System
US20050268608A1 (en) * 2004-06-04 2005-12-08 Zf Friedrichshafen Ag Hydraulic cylinder
EP1790860A2 (fr) * 2005-11-24 2007-05-30 LuK Lamellen und Kupplungsbau Beteiligungs KG Système de mesure de déplacement linéaire pour des systèmes de détachement d'embrayage
DE102009019586A1 (de) * 2008-05-23 2009-11-26 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Geberzylinderanordnung
WO2015074655A1 (fr) * 2013-11-19 2015-05-28 Schaeffler Technologies AG & Co. KG Ensemble piston-cylindre pour unité de débrayage, en particulier pour maître-cylindre d'un moyen d'actionnement d'embrayage hydraulique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741922B1 (fr) * 1995-12-05 1998-01-09 Valeo Procede pour l'assemblage d'un cylindre de commande pour un dispositif de commande hydraulique d'un embrayage de vehicule automobile
FR2790295B1 (fr) * 1999-02-26 2001-04-06 Valeo Dispositif de commande hydraulique d'un embrayage de vehicule automobile
WO2014048427A1 (fr) * 2012-09-26 2014-04-03 Schaeffler Technologies AG & Co. KG Système de débrayage pour un embrayage d'un véhicule à moteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10327437A1 (de) 2002-06-24 2004-01-22 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulisches System
US20050268608A1 (en) * 2004-06-04 2005-12-08 Zf Friedrichshafen Ag Hydraulic cylinder
EP1790860A2 (fr) * 2005-11-24 2007-05-30 LuK Lamellen und Kupplungsbau Beteiligungs KG Système de mesure de déplacement linéaire pour des systèmes de détachement d'embrayage
DE102009019586A1 (de) * 2008-05-23 2009-11-26 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Geberzylinderanordnung
WO2015074655A1 (fr) * 2013-11-19 2015-05-28 Schaeffler Technologies AG & Co. KG Ensemble piston-cylindre pour unité de débrayage, en particulier pour maître-cylindre d'un moyen d'actionnement d'embrayage hydraulique

Also Published As

Publication number Publication date
CN108026985B (zh) 2020-08-07
CN108026985A (zh) 2018-05-11
EP3353443A1 (fr) 2018-08-01
DE112016004328A5 (de) 2018-08-23
DE102016216987A1 (de) 2017-03-30

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