WO2010023010A1 - Élément de tension hydraulique - Google Patents

Élément de tension hydraulique Download PDF

Info

Publication number
WO2010023010A1
WO2010023010A1 PCT/EP2009/058553 EP2009058553W WO2010023010A1 WO 2010023010 A1 WO2010023010 A1 WO 2010023010A1 EP 2009058553 W EP2009058553 W EP 2009058553W WO 2010023010 A1 WO2010023010 A1 WO 2010023010A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide element
piston
hydraulic tensioning
spring
valve plate
Prior art date
Application number
PCT/EP2009/058553
Other languages
German (de)
English (en)
Inventor
Roman Kern
Thomas Ullein
Original Assignee
Schaeffler Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2010023010A1 publication Critical patent/WO2010023010A1/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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
    • F16H7/0836—Means for varying tension of belts, ropes, or chains with vibration damping means of the fluid and restriction type, e.g. dashpot
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0806—Compression coil springs
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0812—Fluid pressure
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path

Definitions

  • the present invention relates to a hydraulic tensioning element, used in tensioning systems of traction drives, in particular chain drives of internal combustion engines, comprising a housing with a guide element and a piston axially guided to the guide element pressurized piston, wherein a fluid via a formed inside the bottom Fluideinlassöff- opening and one in the guide element arranged valve plate into a bounded by the guide member and the piston pressure chamber, wherein a guide element delimiting bottom is conically tapered in the direction of the valve plate and forms a valve seat for the valve plate at a transition zone to the fluid inlet opening, wherein between the guide member and the piston supported at least one spring element.
  • a hydraulic tensioning element according to the aforementioned type is known from the document DE 10 2007 047 170 A1.
  • a one-way valve is provided as a plate valve, which comprises two non-cutting components: a holding element enclosing a valve seat, in which a valve body designed as a disk is guided secured against loss.
  • the designed as a cage holding element which comprises the valve body, designed in the manufacture as consuming, as well as the pre-assembly of the disk designed as a valve body into the cage.
  • the invention is therefore based on the object to produce an easy-to-assemble and cost-effective securement unit between a one-way valve and a guide element of a hydraulic tensioning element.
  • the object is achieved in that within the bottom of the guide element a spaced from the valve seat stage is arranged, on which a one-way valve is arranged, which has a valve plate and the stroke of the valve plate limiting circlip, wherein the retaining ring is captively fitted into the stage ,
  • One step describes a shoulder which is delimited at its two ends by respective surfaces extending perpendicularly thereto, one of the surfaces corresponding to a bottom of the guide element running essentially radially to the longitudinal axis of the tensioning element.
  • the guide element and the bottom formed as a valve seat are preferably made of a metallic material see. To reduce the noise, the damping and / or wear, it is advantageous if the metallic valve seat or the valve plate has a plastic coating or a rubber coating.
  • the step rise in this case runs from the valve seat in the direction of the piston.
  • the diameters of the individual levels resulting from the course of the steps increase in the direction of the course of the steps.
  • the valve plate is arranged at the foot of the stage play on the valve seat.
  • the stroke of the valve plate limiting circlip is force-fit or form-fitting in a spaced-apart from the valve seat stage.
  • the one-way valve can be fitted captive into the guide element without the aid of complicated components.
  • the guide element with integrated one-way valve can thus be introduced as a completely pre-assembled component in the hydraulic tensioning element.
  • Both the retaining ring and the valve plate are preferably made without cutting. Both components can be made of plastic as well as metal. In order to keep the noise low, it makes sense that at least one of the two components is made of plastic.
  • the piston has different shapes. This has the consequence that the guide element is adapted to the particular shape of the piston.
  • a variant consists in that the piston is designed as a solid cylinder, which is arranged longitudinally movable within the guide element.
  • Another variant shows a hollow cylindrical piston which surrounds the guide element and is movable longitudinally movable.
  • At least two concentric coil springs are arranged axially between the guide element and the piston.
  • the two spring elements have different spring wire diameter, wherein preferably the spring element is arranged with the smaller spring wire diameter within the spring element with the larger spring wire diameter.
  • the piston on the bottom side on its side facing away from the traction means has an inner gradation, so that at least one spring end of the spring element can be supported on at least one stage of the bottom of the piston and on the opposite side te the bottom of the piston can support at least one spring end at least one stage of the arranged at the bottom of the guide element stage.
  • the arranged in the bottom of the piston gradation allows additional guidance of the individual sections of the spring elements and provides improved support surfaces for the spring ends.
  • one of the spring elements preferably that which is surrounded by a further spring element is supported with one of its spring ends on the locking ring, which is fitted into the guide element.
  • a latching device is arranged radially between the guide element and the piston, consisting of radially encircling latching grooves and a latching ring or a latching pin.
  • This locking device performs several functions, on the one hand it represents a transport haven, on the other hand, a limitation, so that the piston can not be pushed out of the housing under the force of the spring element. After mounting the tensioner, the transport lock is unlocked. To start up the piston this moves by means of the spring element on the individual Rastsammlungsembl controlled in the direction of the clamping rail.
  • the locking device is partially provided as a leakage gap.
  • FIG. 1 shows a hydraulic tensioning element
  • Figure 2 is a hydraulic clamping element with a hollow cylindrical
  • FIG. 2 a shows a detailed section of the one-way valve fitted in the bottom of the guide element.
  • FIG. 1 shows a hydraulic tensioning element, comprising a housing 1 with a guide element 2 and a pressure-actuated piston 3 axially guided in relation to the guide element 2.
  • the guide element 2 is a pot-type component in which the cylindrical piston 3 is guided in a longitudinally movable manner.
  • fluid preferably engine oil
  • Via a fluid inlet opening 17 introduced into the bottom 6 of the guide element 2 fluid, preferably engine oil, flows via a valve plate 10 arranged in the guide element 2 into a pressure chamber 5 bounded by the piston 3 and guide element 2.
  • the guide element 2 delimiting bottom 6, which is tapered in the direction of the valve plate 10, forms a valve seat 18 for the valve plate 10 at a transition zone to the fluid inlet opening 17.
  • a snap ring 11 by means of force and / or positive fit accurately inserted.
  • valve plate 10 as well as the locking ring 11 form a one-way valve 4 and can be made both of plastic and metal.
  • one of the components should be made of plastic and the other of metal.
  • the spring element 12 is a concentric helical spring arranged inside one another, wherein preferably that helical spring, which is arranged inside the outer helical spring, has a smaller spring wire diameter than the outer helical spring.
  • a predefined spring force is required.
  • at least two spring elements 12 are arranged one inside the other to avoid an increase in the axial space.
  • a latching device 20 is arranged in the region of the leakage gap 16 between the guide element and the piston 3.
  • This latching device 20 is formed from radially encircling latching grooves 14 and a latching ring 15 arranged displaceably for this purpose.
  • the locking ring 15 holds the prestressed piston 3 in a retracted position in the guide member 2.
  • the locking ring 15 is released by pressing the piston 3.
  • the piston 3 moves in the direction of the tensioning rail past several detent points, which it overcomes by means of spring force.
  • Figures 2 and 2 a also show clamping elements which correspond functionally to the clamping element shown in Figure 1.
  • FIGS. 2 and 2a show the piston 3 as a cup-shaped housing and a hollow cylindrical guide element 2 which is enclosed by the piston 3.
  • the piston is arranged longitudinally movable relative to a longitudinal axis 19 and the guide element 2.
  • the bottom 6 of the guide member 2 is formed as a valve seat 18, from which a spaced stage 6 is provided for receiving a one-way valve 4.

Abstract

L'invention concerne un élément de tension hydraulique utilisé dans des systèmes de tension de transmissions par liens flexibles, en particulier de transmissions par chaîne de moteurs à combustion interne, cet élément présentant un carter (1) avec un élément de guidage (2) et un piston (3) soumis à une pression, guidé axialement par rapport à l'élément de guidage (2). Un fluide s'écoule par une ouverture d'entrée de fluide (17) formée dans le fond (6) et par une plaque porte-soupape (10) disposée dans l'élément de guidage (2) dans une chambre de pression (5) limitée par l'élément de guidage (2) et le piston (3). Un fond (6) limitant l'élément de guidage (2) se rétrécit de manière conique en direction de la plaque porte-soupape (10) et forme, au niveau d'une zone de passage vers l'ouverture d'entrée de fluide (17), un siège de soupape (18) pour la plaque porte-soupape (10), au moins un élément de ressort (12) appuyant entre l'élément de guidage (2) et le piston (3).
PCT/EP2009/058553 2008-08-23 2009-07-07 Élément de tension hydraulique WO2010023010A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008039505.6 2008-08-23
DE200810039505 DE102008039505A1 (de) 2008-08-23 2008-08-23 Hydraulisches Spannelement

Publications (1)

Publication Number Publication Date
WO2010023010A1 true WO2010023010A1 (fr) 2010-03-04

Family

ID=41127646

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/058553 WO2010023010A1 (fr) 2008-08-23 2009-07-07 Élément de tension hydraulique

Country Status (2)

Country Link
DE (1) DE102008039505A1 (fr)
WO (1) WO2010023010A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11828206B1 (en) 2022-11-14 2023-11-28 Borgwarner Inc. Hydraulic tensioner with external pin and ratchet mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632383A1 (de) * 1995-08-18 1997-02-20 Borg Warner Automotive Integriertes Einlaß- und Druckentlastungsventil für hydraulische Kettenspanner an Motoren
WO1998005883A1 (fr) * 1996-08-02 1998-02-12 INA Wälzlager Schaeffler oHG Dispositif de tension
DE102004043727A1 (de) * 2004-09-10 2006-03-16 Ina-Schaeffler Kg Hydraulischer Kettenspanner mit verringertem Kolbendruck
EP1650474A2 (fr) * 2004-10-25 2006-04-26 Borgwarner, Inc. Tendeur de chaîne
GB2446246A (en) * 2007-02-02 2008-08-06 Tsubakimoto Chain Co Check valve unit in a hydraulic tensioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007047170A1 (de) 2006-11-24 2008-05-29 Schaeffler Kg Plattenventil für Zugmittelspannsysteme

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632383A1 (de) * 1995-08-18 1997-02-20 Borg Warner Automotive Integriertes Einlaß- und Druckentlastungsventil für hydraulische Kettenspanner an Motoren
WO1998005883A1 (fr) * 1996-08-02 1998-02-12 INA Wälzlager Schaeffler oHG Dispositif de tension
DE102004043727A1 (de) * 2004-09-10 2006-03-16 Ina-Schaeffler Kg Hydraulischer Kettenspanner mit verringertem Kolbendruck
EP1650474A2 (fr) * 2004-10-25 2006-04-26 Borgwarner, Inc. Tendeur de chaîne
GB2446246A (en) * 2007-02-02 2008-08-06 Tsubakimoto Chain Co Check valve unit in a hydraulic tensioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11828206B1 (en) 2022-11-14 2023-11-28 Borgwarner Inc. Hydraulic tensioner with external pin and ratchet mechanism

Also Published As

Publication number Publication date
DE102008039505A1 (de) 2010-02-25

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