WO2009026879A1 - Système de débrayage de l'embrayage - Google Patents

Système de débrayage de l'embrayage Download PDF

Info

Publication number
WO2009026879A1
WO2009026879A1 PCT/DE2008/001317 DE2008001317W WO2009026879A1 WO 2009026879 A1 WO2009026879 A1 WO 2009026879A1 DE 2008001317 W DE2008001317 W DE 2008001317W WO 2009026879 A1 WO2009026879 A1 WO 2009026879A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
piston
release system
clutch release
injection molding
Prior art date
Application number
PCT/DE2008/001317
Other languages
German (de)
English (en)
Inventor
Berthold Altmeppen
Andrej Kubicek
Original Assignee
Luk Lamellen Und Kupplungsbau Beteiligungs 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 Luk Lamellen Und Kupplungsbau Beteiligungs Kg filed Critical Luk Lamellen Und Kupplungsbau Beteiligungs Kg
Priority to EP08828155A priority Critical patent/EP2188542A1/fr
Priority to DE112008002153T priority patent/DE112008002153A5/de
Priority to BRPI0816120-8A2A priority patent/BRPI0816120A2/pt
Publication of WO2009026879A1 publication Critical patent/WO2009026879A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
    • F16D25/083—Actuators therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/372—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings provided with means for marking or patterning, e.g. numbering articles
    • 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
    • F16D25/088—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members being distinctly separate from the axis of rotation
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
    • F16J10/02—Cylinders designed to receive moving pistons or plungers
    • F16J10/04—Running faces; Liners
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/10—Surface characteristics; Details related to material surfaces

Definitions

  • the invention relates to a clutch release system having at least one cylinder for actuating a friction clutch by means of a release system.
  • Such Kupplungsausschsysteme are known in hydraulic or pneumatic design.
  • the function of the master cylinder can be taken over by a hydraulic pump or a pressure accumulator and the slave cylinder can be selectively supplied with pressure by an intermediate control valve.
  • a dynamic seal is placed on the piston or in the housing wall or a corresponding component which is moved in sliding contact with the surface on which it seals.
  • a clutch release system having at least one cylinder containing a fluid, whereby a disengagement unit of a friction clutch is displaced axially in dependence on a pressure of the fluid built up in the at least one cylinder and the friction clutch is actuated therewith, consisting of a housing axially displaceably guided in a housing Piston with a seal that is relative to the displacement of the piston is guided to a surface, solved, wherein the surface has a relation to a smooth surface reduced support portion for the piston.
  • the cylinder can be a master cylinder, a slave cylinder concentrically arranged around a transmission input shaft with an annular piston (central release) or a slave cylinder designated as a slave cylinder in a simple design with a piston with a fully cylindrical pressure surface, the piston by means of an actuating lever on an off or Engagement bearing the friction clutch acts.
  • the seal may be provided on the piston, for example as a U-ring seal on an annular piston in a Gottausschreiber, wherein at least one of the surfaces, namely belonging to the housing outer surface or to a guide sleeve, which may also be part of the housing, associated inner surface.
  • the seal may be arranged in the housing, for example in a master cylinder or a semi-cylinder.
  • this may be a so-called secondary seal contained in the master cylinder for sealing the inner space relative to the outer space, which also seals between the piston and the housing, wherein between the pressure chamber sealing primary seal and the secondary seal may be an inlet for a fluid expansion tank.
  • the fluid may be a liquid pressure medium, such as polyglycols or other liquids or oils with lubricating properties and high boiling point, or a gas such as air.
  • the ratio of the area that can come into contact with the seal to understand the total geometric area of the sealing surface is given for details of the carrying percentage.
  • a reduction of the carrying component is achieved in the sense of the invention in that evenly distributed over the surface depressions or elevations are present, which are tuned in their lateral extent so that the elasticity of the seal is not sufficient to penetrate into the recesses formed by the depressions or elevations and to follow the surface forms formed there. On the contrary, at least microscopically, a passage through the sealing path covered by the seal is created at these depressions.
  • components with the desired reduced Tragan turnover made of plastic can be produced by injection molding.
  • the plastic surfaces can be tool traps without further fine machining, if the injection molding tools used for their preparation are vorzuietet according to a reduction of the supporting portion.
  • the surfaces of the injection molding tool which are to form a region with a reduced support component, can be prepared accordingly by introducing the desired surface with a reduced support component already as a negative mold. It is understood that corresponding shrinkage effects are already taken into account during production.
  • the reduced support surface may, for example, advantageously include uniformly distributed dimples, crests or similar geometric shapes of different sizes within a given size distribution, rounded in such a way that no shearing action on the seal corresponding to the surface occurs.
  • corresponding depressions formed in the negative are provided in the injection molding tool.
  • the injection molding tool itself may have the elevations, whereby in the surface following the negative image depressions are impressed into the surface during the production of the component carrying this surface.
  • the measured roughness depth can be used as the measured variable, in which the mean values of empirically determined roughness depths are evaluated. On the basis of this measure, average roughness depths less than or equal to 4 ⁇ m have proved to be advantageous. Furthermore, it has proved to be advantageous if lubricant is introduced into the recesses of the surface.
  • the depressions can serve as a lubricant supply and additionally or alternatively eliminate the interference caused by the reduction of the bearing component disturbances of the sealing section by filling the wells. In this case, due to the low geometric expansion with the occurring pressure components already a lubricant of ordinary viscosity may be suitable to bring about an improvement in the tightness.
  • a temperature-resistant and high-viscosity lubricant which contains particles of fluorohydrocarbons, for example PTFE, has proved particularly advantageous.
  • PTFE fluorohydrocarbons
  • Components according to the invention are advantageously produced by means of an injection molding tool with a surface located in the injection chamber, wherein a surface portion at which the surface is formed for a sealing career of the component, an average roughness depth is set equal to 4 microns.
  • an average roughness depth is set equal to 4 microns.
  • the desired surface structure for reducing the carrying portion in the injection molding tool is provided as a negative die by at least the surface portion which forms the contact surface with the seal being eroded.
  • the degree of erosion is chosen so that a corresponding average roughness depth is achieved.
  • the shape of the surface which results from the erosion process for a given roughness depth is advantageously suitable for the reduction of the support component.
  • the erosion process produces dome-shaped or knob-like surface structures that are rounded and similar to the lotus effect.
  • other designs of the surface in the form of patterns that can be repeated regularly in lateral E-benes or randomly distributed patterns depending on the application possible. For example, lotus-like patterns may be provided.
  • Advantageous results have been achieved with EDM processes according to VDI Standard 3400, with erosion in stages 13 to 18, preferably step 15, giving particularly advantageous results.
  • Figure 1 is a schematically illustrated embodiment of a clutch release system
  • FIG. 2 is an illustration of an enlarged surface with a reduced bearing component.
  • Figure 1 shows a schematic representation of a possible embodiment of a clutch release system 1 with a master cylinder 2 and connected by means of a line 3 to the master cylinder slave cylinder 4.
  • a filter 7 as a pressure relief valve and / or can serve as a so-called Kribbelfilter be installed.
  • the clutch release system 1 actuates the friction clutch 8 hydraulically by acting on the master cylinder 2 by means of an actuator 9, which may be a foot pedal, an actuator, such as an electric actuator, or the like.
  • an actuator 9 which may be a foot pedal, an actuator, such as an electric actuator, or the like.
  • 10 pressure in the master cylinder 2 is constructed by means of a mechanical transmission, which builds up a pressure in the slave cylinder 4, which is designed as a central release via the line 3.
  • the slave cylinder 4 brings about an actuating bearing 12, the necessary disengaging force to the friction clutch 8, or at the actuating elements 11, for example, a plate spring or an actuating lever.
  • the nature of the tension of the actuators 11 with the clutch cover 13 determines whether it is an on or pushed clutch.
  • the coupling is opened by the annular piston 14 or, in the case of a compressed coupling (not shown), closed by the annular piston.
  • the transmission input shaft 15 transmits the closed friction clutch 8, the torque of - not shown-, with the clutch rotatably connected to an internal combustion engine not shown in detail and then to the drive wheels of a motor vehicle.
  • the proposed structure of the surface while reducing the supporting portion may be provided on the surface 2b of the piston 2a in the master cylinder 2.
  • the master cylinder 2 contains two - not shown - lip seals, a lip seal seals the pressure chamber 2c as a primary seal by fixedly disposed in the housing of the master cylinder 2 and forms a dynamic sealing contact with its sealing lip upon displacement of the piston. Axially spaced, the second lip seal is arranged as a secondary seal fixed in the housing, the sealing lip also seals on the piston 2a, the master cylinder to the outside. Between the two seals of the inlet for the reservoir 17 is provided.
  • the slave cylinder piston 4a which is formed as an annular piston 4a and has a U-ring seal 4b, which may be in sealing contact with the outer surface 4c of the housing of the slave cylinder 4 and with the inner surface 4d of the guide sleeve.
  • the guide sleeve is integrated into the slave cylinder in a slave cylinder 4 made of plastic.
  • the guide sleeve may be formed of metal and connected to the housing of the slave cylinder 4.
  • surfaces may be formed from plastic by the injection molding tool used for the preparation of a suitably prepared counter surface, which is eroded in an advantageous manner, or made of metal sealing surfaces, which are themselves eroded.
  • the statements made above apply mutatis mutandis.
  • FIG. 2 shows an exemplary embodiment of an enlarged representation of a plastic surface produced in an injection molding tool which was produced in the relevant surface area according to VDI method 3400, step 14 and has an average roughness depth of 4 ⁇ m.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

L'invention concerne un système de débrayage de l'embrayage comportant au moins un cylindre présentant une voie de joint destinée à un joint dynamique, le pourcentage de portée de la voie de joint étant réduit par rapport à celui d'une surface lisse.
PCT/DE2008/001317 2007-08-30 2008-08-11 Système de débrayage de l'embrayage WO2009026879A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08828155A EP2188542A1 (fr) 2007-08-30 2008-08-11 Système de débrayage de l'embrayage
DE112008002153T DE112008002153A5 (de) 2007-08-30 2008-08-11 Kupplungsausrücksystem und Spritzgusswerkzeug
BRPI0816120-8A2A BRPI0816120A2 (pt) 2007-08-30 2008-08-11 Sistema de desengate de embreagem e ferramenta de fundição por injeção

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007040968 2007-08-30
DE102007040968.2 2007-08-30

Publications (1)

Publication Number Publication Date
WO2009026879A1 true WO2009026879A1 (fr) 2009-03-05

Family

ID=40202922

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001317 WO2009026879A1 (fr) 2007-08-30 2008-08-11 Système de débrayage de l'embrayage

Country Status (4)

Country Link
EP (1) EP2188542A1 (fr)
BR (1) BRPI0816120A2 (fr)
DE (2) DE102008037328A1 (fr)
WO (1) WO2009026879A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037459A (ja) * 1983-08-07 1985-02-26 Aisin Seiki Co Ltd 樹脂製油圧シリンダ
EP0181958A1 (fr) * 1984-11-20 1986-05-28 Firma Karl-Heinz Schnieder Procédé de réalisation d'un moule d'injection pour la fabrication d'un siège canné en matière synthétique
DE19811657A1 (de) * 1998-03-18 1999-09-23 Schaeffler Waelzlager Ohg Hydraulisch betätigbares Ausrücksystem
US5988340A (en) * 1996-07-20 1999-11-23 Fichtel & Sachs Ag Two components of a cylinder for a hydraulically operated friction clutch assembly having scored running surface for minimizing noise
US6244409B1 (en) 1998-10-29 2001-06-12 Luk Lamellen Und Kupplungsbau Gmbh Slave cylinder for a centered clutch release system
DE10134999A1 (de) 2000-08-11 2002-02-21 Luk Lamellen & Kupplungsbau Hydraulisches System
US20020116924A1 (en) * 1999-10-18 2002-08-29 Luk Lamellen Und Kupplungsbau Gmbh Master cylinder for use in power trains of motor vehicles
US20040065083A1 (en) * 2002-06-24 2004-04-08 Luk Lamellen Und Kupplungsbau Hydraulic system for a motor vehicle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037459A (ja) * 1983-08-07 1985-02-26 Aisin Seiki Co Ltd 樹脂製油圧シリンダ
EP0181958A1 (fr) * 1984-11-20 1986-05-28 Firma Karl-Heinz Schnieder Procédé de réalisation d'un moule d'injection pour la fabrication d'un siège canné en matière synthétique
US5988340A (en) * 1996-07-20 1999-11-23 Fichtel & Sachs Ag Two components of a cylinder for a hydraulically operated friction clutch assembly having scored running surface for minimizing noise
DE19811657A1 (de) * 1998-03-18 1999-09-23 Schaeffler Waelzlager Ohg Hydraulisch betätigbares Ausrücksystem
US6244409B1 (en) 1998-10-29 2001-06-12 Luk Lamellen Und Kupplungsbau Gmbh Slave cylinder for a centered clutch release system
US20020116924A1 (en) * 1999-10-18 2002-08-29 Luk Lamellen Und Kupplungsbau Gmbh Master cylinder for use in power trains of motor vehicles
US6446436B1 (en) * 1999-10-18 2002-09-10 Luk Lamellen Und Kupplungsbau Gmbh Master cylinder for use in power trains of motor vehicles
DE10134999A1 (de) 2000-08-11 2002-02-21 Luk Lamellen & Kupplungsbau Hydraulisches System
US20040065083A1 (en) * 2002-06-24 2004-04-08 Luk Lamellen Und Kupplungsbau Hydraulic system for a motor vehicle

Also Published As

Publication number Publication date
DE102008037328A1 (de) 2009-03-05
EP2188542A1 (fr) 2010-05-26
BRPI0816120A2 (pt) 2015-03-03
DE112008002153A5 (de) 2010-05-12

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