WO2009003825A1 - Dispositif de tension pour moyen de traction - Google Patents

Dispositif de tension pour moyen de traction Download PDF

Info

Publication number
WO2009003825A1
WO2009003825A1 PCT/EP2008/057489 EP2008057489W WO2009003825A1 WO 2009003825 A1 WO2009003825 A1 WO 2009003825A1 EP 2008057489 W EP2008057489 W EP 2008057489W WO 2009003825 A1 WO2009003825 A1 WO 2009003825A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
valve
clamping device
pressure chamber
valve body
Prior art date
Application number
PCT/EP2008/057489
Other languages
German (de)
English (en)
Inventor
Roman Kern
Reinhard Koch
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 WO2009003825A1 publication Critical patent/WO2009003825A1/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
    • F16H2007/0814—Fluid pressure with valves opening on surplus pressure

Definitions

  • the invention relates to a tensioning device for a traction means, in particular a chain, with a longitudinally movably guided in a housing, against the traction spring sprung piston and a damping device for damping movements of the piston, with a housing formed in the pressure chamber, from the hydraulic fluid, in particular engine oil, can be removed via a leakage gap and at least one valve which has a relative to a stationary valve portion movable valve body.
  • a hydraulic tensioning device for a traction mechanism drive which can be used, for example, in a chain drive of an internal combustion engine.
  • a tensioned against a chain tensioning piston is taken longitudinally displaceable in a cylinder.
  • the clamping piston and the cylinder limit a pressure chamber for receiving hydraulic fluid such as engine oil. Clamping movements of the clamping piston in the direction of the chain cause an enlargement of the pressure chamber, whereby due to the then adjusting negative pressure opens a check valve, so that engine oil can flow into the pressure chamber. If, on the other hand, the chain tightens, the tensioning piston is pushed inwards, away from the chain, reducing the pressure space.
  • check valves or pressure relief valves are excited dynamically during operation of the internal combustion engine, often they are even installed in moving components or connected to moving components in such a way that their vibration behavior is transmitted to the tensioning device.
  • the invention has for its object to provide a clamping device whose dynamic behavior is improved.
  • the movable valve body has a piston portion which is formed such that when opening the valve, a movement of the valve body damping gap between the piston portion and the fixed valve portion is formed.
  • the invention is based on the finding that the dynamic behavior can be improved if instead of a conventional valve ball, a valve body is used with a piston portion which is formed so that between the piston portion and the fixed valve portion, a gap is formed, which has a damping effect exerts on the movable valve body. It is therefore preferred that the diameter of the Kolbenab- cut is smaller than the inner diameter of the stationary valve portion, whereby preferably an annular gap is formed. This annular gap acts as a leakage gap and prevents the occurrence of unwanted dynamic effects such as vibrations or resonance phenomena.
  • the piston portion at least one connected to the pressure chamber axial and has at least one associated radial bore and a stationary valve portion sealing sealing portion.
  • the piston portion consists of a pressure chamber closing portion having the axial and the radial bore, to this section, the sealing portion connects, which has a larger diameter than the piston portion and rests on the stationary valve portion when the valve is closed , When opening the valve, the hydraulic fluid can flow out of the pressure chamber through the axial and the associated radial bore.
  • the piston section has a plurality of axial and / or radial bores.
  • the piston portion has at least one groove connected to the pressure chamber and a sealing portion sealing the stationary valve portion.
  • the at least one groove is formed on the outside of the piston portion and increases the gap formed between the piston portion and the fixed valve portion. In the closed state, a leakage of the hydraulic fluid from the pressure chamber is prevented by the sealing portion which seals the stationary valve portion and which is preferably acted upon by a spring element.
  • the piston portion may have a plurality of grooves connected to the pressure chamber.
  • the at least one groove extends in a spiral shape. This circumferential groove also calms the dynamic behavior of the However, when opening the valve, it is ensured that the hydraulic fluid can flow out quickly.
  • a sealing ring in particular an O-ring, is arranged on the piston section and / or the stationary valve section.
  • the sealing ring causes a mechanical damping of the movement of the movable valve body.
  • the invention can be applied to a valve designed as a check valve or pressure relief valve (pressure relief valve).
  • FIG. 1 shows a first embodiment of a clamping device according to the invention in a sectional view.
  • Fig. 2 shows a second embodiment of an inventive
  • Fig. 3 shows a detail of a clamping device according to a third
  • Fig. 4 shows a detail of a clamping device according to a fourth
  • FIG. 5 shows a section through the tensioning device shown in FIG. 4 along the line V-V;
  • Fig. 6 shows an embodiment of a movable valve element.
  • Fig. 1 shows a first embodiment of a hydraulic tensioning device 1, which consists essentially of a housing 2 and a longitudinally movably guided in the housing 2 piston 3. When installed, the outer end of the piston 3 bears against a chain of a traction means of an internal combustion engine.
  • a pressure chamber 4 is formed, which is filled with a hydraulic fluid such as engine oil.
  • a designed as a compression spring 5 spring element pushes the piston 3 as far out of the housing 2 until a balance between the spring force and the contact pressure is reached.
  • the pressure chamber 4 increases, so that it sets a negative pressure, which causes a arranged in the bottom of the housing 2 check valve 6 opens and engine oil can flow into the pressure chamber 4.
  • a pressure relief valve 8 opens, so that the engine oil can flow out through an axial opening in the piston 3.
  • the pressure relief valve 8 comprises a movable valve body 9, which seals the pressure chamber 4 with respect to a stationary valve section 10.
  • the movable valve body 9 is acted upon by the force of a compression spring 1 1.
  • the movable valve body 9 consists of a first portion 12 whose outer diameter is larger than the inner diameter of the bore of the stationary valve portion 10 and one to the portion 12 integrally formed piston portion 13 which is in the closed state in the region of the stationary valve portion 10.
  • the sealing of the pressure chamber 4 is carried by the portion 12 of the movable valve body, which rests on an annular surface of the stationary valve portion 10.
  • an annular gap 14 is formed, which dampens the movement of the movable valve body 9, when it is dynamically excited.
  • Fig. 2 shows a second embodiment of a clamping device, wherein for identical components the same reference numerals as in Fig. 1 are used.
  • the piston 3 and the housing 2 are constructed as in the first embodiment.
  • the movable valve body 15 in the region of its piston portion has an axial bore 16 and a radial bore 17 connected thereto.
  • the pressure relief valve When opening the pressure relief valve can hydraulic fluid from the pressure chamber 4 via the axial bore 16 and the radial bore 17 in the outer end of the piston 3 and drain from there to the outside. Through the holes 16, 17 can drain a larger volume, so that the pressure prevailing in the pressure chamber 4 pressure can be abruptly reduced.
  • Fig. 3 shows a further embodiment of a clamping device, wherein only the region of the pressure relief valve is shown.
  • the movable valve body 18 consists of a piston portion 13 which is formed as in the embodiment shown in FIG. 2 and has an axial bore 16 and a radial bore 17.
  • the sealing of the pressure chamber 4 is effected by a valve portion 19 which is formed obliquely and rests in the closed state on the annular surface 20 of the stationary valve portion 10 and the pressure chamber 4 closes.
  • the pressure relief valve is opened against the force of the compression spring 11, the movable valve body 18 in the in 3, so that the hydraulic fluid flows from the pressure chamber 4 via the axial bore 16, the radial bore 17 and past the valve portion 19 into the upper end of the piston 3.
  • Fig. 4 and 5 show another embodiment of a clamping device.
  • Fig. 4 is a sectional side view
  • Fig. 5 is a section along the line V-V.
  • the movable valve body 21 has a total of four circumferentially distributed grooves 22 which extend vertically on the outside of the piston portion.
  • the valve portion 19 seals as in the embodiment of Fig. 3 from the pressure chamber in the closed state.
  • FIG. 6 shows a further embodiment of a movable valve body 23, which consists of a valve section 19 for sealing the annular surface of the stationary valve section 10 and a piston section 24 which has a spirally encircling groove 25 on its outer side.
  • the groove 25 causes a calming of the movement of the movable valve body 23 when it is excited by dynamic effects.
  • the hydraulic fluid flows out through the clearance between the piston portion 24 and the recess of the stationary valve body at the valve portion 19.

Abstract

L'invention concerne un dispositif de tension destiné à un moyen de traction, en particulier à une chaîne. Ce dispositif comprend un piston guidé de façon mobile longitudinalement dans un carter et sollicité par ressort à l'encontre du moyen de traction, un dispositif d'amortissement servant à amortir les déplacements du piston, une chambre de pression qui est formée dans le carter et à partir de laquelle un liquide hydraulique, en particulier de l'huile moteur, peut être transporté par un interstice de fuite, ainsi qu'au moins une soupape qui présente un corps de soupape mobile par rapport à une section de soupape fixe. Selon l'invention, le corps de soupape mobile (9, 15, 18, 21, 23) présente une section de piston qui est conçue de sorte que, à l'ouverture de la soupape, un interstice amortissant le déplacement du corps de soupape (9, 15, 18, 21, 23) soit formé entre la section de piston (13, 24) et la section de soupape fixe (10).
PCT/EP2008/057489 2007-07-05 2008-06-13 Dispositif de tension pour moyen de traction WO2009003825A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007031296.4 2007-07-05
DE102007031296.4A DE102007031296B4 (de) 2007-07-05 2007-07-05 Spanneinrichtung für ein Zugmittel

Publications (1)

Publication Number Publication Date
WO2009003825A1 true WO2009003825A1 (fr) 2009-01-08

Family

ID=39672829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057489 WO2009003825A1 (fr) 2007-07-05 2008-06-13 Dispositif de tension pour moyen de traction

Country Status (2)

Country Link
DE (1) DE102007031296B4 (fr)
WO (1) WO2009003825A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013043373A1 (fr) * 2011-09-22 2013-03-28 Borgwarner Inc. Mécanisme de commande de la force de ressort de tensionneur d'entraînement de chaîne
US9360088B2 (en) 2011-09-22 2016-06-07 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US9683637B2 (en) 2012-12-18 2017-06-20 Borgwarner Inc. Tensioner with spring force control in a second bore
US10077825B2 (en) 2013-03-07 2018-09-18 Borgwarner Inc. Tensioner with spring force control
US11486473B2 (en) 2018-01-31 2022-11-01 Borgwarner Inc. Variable force tensioner arm with cap disk spring

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5464438B2 (ja) 2010-06-24 2014-04-09 Ｓｍｃ株式会社 減圧装置
DE102010034290A1 (de) * 2010-08-13 2012-02-16 Schaeffler Technologies Gmbh & Co. Kg Druckbegrenztes hydraulisch gedämpftes Spannsystem
WO2013134215A1 (fr) 2012-03-08 2013-09-12 Waters Technologies Corporation Régulateur de contre-pression statique
DE102014002845A1 (de) * 2014-02-25 2015-08-27 Gec-Co Global Engineering & Consulting - Company Gmbh Drucksteuervorrichtung
CN108626331B (zh) 2017-03-21 2021-03-02 株式会社椿本链条 张紧装置
JP6912717B2 (ja) 2017-08-23 2021-08-04 株式会社椿本チエイン テンショナ

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874352A (en) * 1987-08-06 1989-10-17 Tsubakimoto Chain Co. Fluidic tensioner
EP0483564A1 (fr) * 1990-10-31 1992-05-06 INA Wälzlager Schaeffler KG Tendeur hydraulique pour courroies ou chaînes
DE19614077A1 (de) * 1995-04-11 1996-10-17 Borg Warner Automotive Hydraulischer Spanner mit Druckentlastungsventil
DE19719667A1 (de) * 1996-05-10 1997-11-13 Borg Warner Automotive Kk Hydraulische Spanneinrichtung mit Belüftungskanal
US5842943A (en) * 1996-05-10 1998-12-01 Borg-Warner Automotive, K.K. Hydraulic tensioner having an oil reservoir sponge member
EP0952375A2 (fr) * 1998-04-20 1999-10-27 Borg-Warner Automotive, Inc. Tendeur hydraulique avec une soupape de surpression
GB2352794A (en) * 1999-06-30 2001-02-07 Tsubakimoto Chain Co Hydraulic tensioner with relief valve
US6383103B1 (en) * 1999-02-18 2002-05-07 Tsubakimoto Chain Co. Hydraulic tensioner
DE20202664U1 (de) * 2002-02-20 2002-11-07 Winklhofer & Soehne Gmbh Spannvorrichtung mit Spanndruck-Regelventil
DE10155370A1 (de) * 2001-11-10 2003-05-22 Bayerische Motoren Werke Ag Hydraulische Spannvorrichtung für ein Zugmittelgetriebe, insbesondere Ketten- oder Riementriebe von Brennkraftmaschinen
DE10155360A1 (de) * 2001-11-10 2003-05-22 Bayerische Motoren Werke Ag Hydraulische Spannvorrichtung für ein Zugmittelgetriebe, insbesondere Ketten- oder Riementriebe von Brennkraftmaschinen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9409155U1 (de) 1994-06-06 1995-10-12 Winklhofer & Soehne Gmbh Hydraulische Spanneinrichtung
US6716124B2 (en) 2000-11-29 2004-04-06 Borgwarner Inc. Hydraulic tensioner with improved pressure relief valve reactive to peak operating loads
DE102004040222A1 (de) 2004-08-19 2006-03-02 Ina-Schaeffler Kg Hydraulische Spannvorrichtung für einen Zugmitteltrieb

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874352A (en) * 1987-08-06 1989-10-17 Tsubakimoto Chain Co. Fluidic tensioner
EP0483564A1 (fr) * 1990-10-31 1992-05-06 INA Wälzlager Schaeffler KG Tendeur hydraulique pour courroies ou chaînes
DE19614077A1 (de) * 1995-04-11 1996-10-17 Borg Warner Automotive Hydraulischer Spanner mit Druckentlastungsventil
DE19719667A1 (de) * 1996-05-10 1997-11-13 Borg Warner Automotive Kk Hydraulische Spanneinrichtung mit Belüftungskanal
US5842943A (en) * 1996-05-10 1998-12-01 Borg-Warner Automotive, K.K. Hydraulic tensioner having an oil reservoir sponge member
EP0952375A2 (fr) * 1998-04-20 1999-10-27 Borg-Warner Automotive, Inc. Tendeur hydraulique avec une soupape de surpression
US6383103B1 (en) * 1999-02-18 2002-05-07 Tsubakimoto Chain Co. Hydraulic tensioner
GB2352794A (en) * 1999-06-30 2001-02-07 Tsubakimoto Chain Co Hydraulic tensioner with relief valve
DE10155370A1 (de) * 2001-11-10 2003-05-22 Bayerische Motoren Werke Ag Hydraulische Spannvorrichtung für ein Zugmittelgetriebe, insbesondere Ketten- oder Riementriebe von Brennkraftmaschinen
DE10155360A1 (de) * 2001-11-10 2003-05-22 Bayerische Motoren Werke Ag Hydraulische Spannvorrichtung für ein Zugmittelgetriebe, insbesondere Ketten- oder Riementriebe von Brennkraftmaschinen
DE20202664U1 (de) * 2002-02-20 2002-11-07 Winklhofer & Soehne Gmbh Spannvorrichtung mit Spanndruck-Regelventil

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013043373A1 (fr) * 2011-09-22 2013-03-28 Borgwarner Inc. Mécanisme de commande de la force de ressort de tensionneur d'entraînement de chaîne
US9360088B2 (en) 2011-09-22 2016-06-07 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US9377088B2 (en) 2011-09-22 2016-06-28 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US9377087B2 (en) 2011-09-22 2016-06-28 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US11078992B2 (en) 2011-09-22 2021-08-03 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US9879764B2 (en) 2011-09-22 2018-01-30 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US10677325B2 (en) 2011-09-22 2020-06-09 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US10125849B2 (en) 2011-09-22 2018-11-13 Borgwarner Inc. Chain drive tensioner spring force control mechanism
US10612629B2 (en) 2012-12-18 2020-04-07 Borgwarner Inc. Tensioner with spring force control in a second bore
US10436291B2 (en) 2012-12-18 2019-10-08 Borgwarner Inc. Tensioner with spring force control in a second bore
US9683637B2 (en) 2012-12-18 2017-06-20 Borgwarner Inc. Tensioner with spring force control in a second bore
US11402000B2 (en) 2012-12-18 2022-08-02 Borgwarner Inc. Tensioner with spring force control in a second bore
US10077825B2 (en) 2013-03-07 2018-09-18 Borgwarner Inc. Tensioner with spring force control
US11486473B2 (en) 2018-01-31 2022-11-01 Borgwarner Inc. Variable force tensioner arm with cap disk spring

Also Published As

Publication number Publication date
DE102007031296B4 (de) 2019-04-25
DE102007031296A1 (de) 2009-01-08

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