WO2008061881A1 - Soupape à plaquettes pour un système de serrage hydraulique - Google Patents

Soupape à plaquettes pour un système de serrage hydraulique Download PDF

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Publication number
WO2008061881A1
WO2008061881A1 PCT/EP2007/061973 EP2007061973W WO2008061881A1 WO 2008061881 A1 WO2008061881 A1 WO 2008061881A1 EP 2007061973 W EP2007061973 W EP 2007061973W WO 2008061881 A1 WO2008061881 A1 WO 2008061881A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
hydraulic
hydraulic valve
housing
plate
Prior art date
Application number
PCT/EP2007/061973
Other languages
German (de)
English (en)
Inventor
Roman Kern
Reinhard Koch
Matthias Schmidl
Michael Bogner
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 WO2008061881A1 publication Critical patent/WO2008061881A1/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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/141—Check valves with flexible valve members the closure elements not being fixed to the valve body
    • 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
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • 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
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves

Definitions

  • the present invention relates to a hydraulic valve which is intended in particular for a hydraulic tensioning system of a traction mechanism drive.
  • the acted upon by a fluid flow, integrated in a housing hydraulic valve forms a backstop.
  • the structure of the hydraulic clamping system comprises a housing as a cylinder in which a spring-loaded piston is guided, which limits a hydraulic fluid-filled pressure chamber. An adjusting movement of the piston influences the volume of the pressure chamber, with an exchange of the hydraulic fluid from the pressure chamber into the storage space via a leakage gap and in the opposite direction via the return valve forming a hydraulic valve.
  • DE 100 19 534 A1 shows a check valve comprising a non-cutting metal housing, which encloses an insert in which a spring-loaded valve body is integrated.
  • the valve body forms a backstop together with a valve seat of the housing.
  • the valve seat is acted upon by a fluid flow, wherein a fluid pressure that exceeds the spring force of the valve body, the valve body shifts from the valve seat and allows fluid flow through the hydraulic valve.
  • the structure of this known valve requires an elaborate assembly, wherein the outer part made of non-cutting metal sheet is mechanically transformed after the assembly of the designed as an insert valve body to achieve a captive.
  • DE 6 95 921 A1 discloses a designed as a throttle valve, a backstop enclosing one-way valve, which is used for a pressure-medium-operated shift clutch.
  • the valve allows for unrestricted fluid flow from the master cylinder to the slave cylinder of the hydraulically operated shift disconnect clutch. In a fluid flow reversal, the hydraulic valve is closed except for a control bore, which sets a delayed engagement of the shift disconnect clutch.
  • the valve includes a conical seat causing high manufacturing costs.
  • the invention has for its object to realize a hydraulic valve with integrated return valve with a simple structure that can be produced and assembled inexpensively without further rework, and space-optimized can be used.
  • this hydraulic valve comprises a valve body designed as a plate-like, elastic and pivotable valve plate.
  • the valve plate is assigned directly to one of a fluid flow acted upon supply bore of the housing.
  • the design of the valve plate allows a cost-effective, such as non-cutting production and requires due to the small wall thickness almost no additional space. Consequently, the hydraulic valve according to the invention can also be subsequently integrated into existing components or housing.
  • the hydraulic valve according to the invention is constructed in one piece, since in addition the pivotable elastic valve plate is actuated exclusively by the fluid flow, a simplified assembly of the hydraulic valve sets.
  • the hydraulic valve according to the invention in a hydraulic tensioning element measure of the invention integrated in a hydraulic tensioning element of a traction mechanism drive.
  • the hydraulic valve according to the invention in a hydraulic tensioning element of a traction mechanism drive, it makes sense to integrate the hydraulic valve in a housing, wherein the elastic valve plate cooperates with a supply bore. For this purpose, the valve plate is inserted so that it is acted upon directly by the flow of hydraulic fluid.
  • the structure of the hydraulic tensioning system further comprises a piston integrated in the cylinder and a compression spring, wherein the pressure spring on the one hand the force of the piston and on the other hand immediately the hydraulic valve according to the invention. In a downward piston movement located in the pressure chamber of the cylinder hydraulic fluid is pressed through a leakage gap or alternatively by means of a throttle bore in a low-pressure chamber or storage space.
  • the thereby adjusting pressure in the pressure chamber of the cylinder presses the elastic valve plate against the bottom of the pressure chamber and thus reliably closes the supply bore of the housing or of the cylinder.
  • An opposite piston movement causes a suction or the negative pressure, whereby hydraulic fluid from the reservoir via the Nachsaug- or supply bore enters the pressure chamber.
  • the elastic valve plate of the hydraulic valve according to the invention opens, wherein the response of the valve plate is designed so that it opens at the slightest vacuum.
  • An advantageous embodiment of the invention provides to make the elastic region of the valve plate as a circular surface, which is connected via a designated as a tongue web with an annular outer contour, an outer ring.
  • This design is particularly suitable for the installation of the valve plate according to the invention in a cylinder, wherein the as circular surface designed elastic region is assigned directly to a central bore of the cylinder and thus can be acted upon directly by the fluid flow.
  • An alternative structure includes a hydraulic valve in which the elastic valve plate is connected via a web to an upstream disc.
  • the valve plate In the installed state, the valve plate is assigned directly to the feed bore of the housing.
  • the central opening having a parallel spaced from the valve plate arranged disc is intended for centering the compression spring and at the same time forms a stop, a Stellwegbegrenzung for the pivotable valve plate.
  • the design of the hydraulic valve advantageously provides that the elastic, pivotable and disc-shaped valve plate, is arranged centrally.
  • the hydraulic valve is non-cutting, preferably produced by means of a punch made of sheet metal. This shape and this manufacturing process enable a cost-effective manufacturing manufacturing process of the hydraulic valve.
  • the pivotable valve plate is inserted prestressed in the installed state. This measure, which should also be referred to as basic prestressing, ensures reliable closing of the hydraulic valve.
  • the invention further includes, the hydraulic valve, in particular the valve plate, to be made of a plastic.
  • the plastic valve plate which can be used as an alternative to a sheet-metal valve plate in a hydraulic tensioning system, is preferably pressed against the bottom of the housing or of the cylinder in the installed state by the compression spring.
  • the hydraulic valve closes outside on the centering noses over which the hydraulic valve is centered in the housing.
  • centering lugs it is advisable to arrange, for example, on the bottom of the housing slugs, knobs or projections which define a defined installation position of the valve plate.
  • the hydraulic valve according to the invention further comprises a travel limit for the elastic valve plate. This measure prevents, for example, in the case of an increased, suddenly occurring increase in pressure of the fluid flow, an excessive deflection of the elastic valve plate which prevents it from pivoting back into the initial position.
  • the travel limit improves the reliability of the valve according to the invention.
  • Figure 1 a piston-cylinder unit in which a hydraulic valve according to the invention is integrated;
  • Figure 2 the assembly in a sectional view taken along the line 2-2 in Figure 1;
  • FIG. 3 shows a three-dimensional individual part of a hydraulic valve according to the invention
  • Figure 4 the hydraulic valve of Figure 3 in conjunction with a Stellwegbegrenzung the valve plate.
  • FIG. 5 shows a piston-cylinder unit according to FIG. 1 in conjunction with an alternatively constructed hydraulic valve
  • FIG. 6 shows the hydraulic valve according to FIG. 5 in a plan view
  • FIG. 7 shows a sectional view of the hydraulic valve according to FIG. 5.
  • FIG. 1 shows a piston-cylinder unit 1 is shown, which is integrated, for example, in a hydraulic tensioning device for a traction mechanism.
  • This unit comprises a cylinder 2 designed as a housing 2, in which a piston 3 is guided longitudinally displaceable.
  • the piston 3 delimits a trapped in the housing 2, filled with a hydraulic fluid pressure chamber 4.
  • a hydraulic fluid pressure chamber 4 For acting on the pressure chamber 4 with a hydraulic fluid in a bottom 5 of the housing 2 is centrally introduced a feed bore 6.
  • the pressure chamber 4 serves to receive a compression spring 7 inserted between the base 5 and the piston 3, which exerts a force acting in the direction of the arrow on the piston 3.
  • a hydraulic valve 8a is integrated, designed as a disc-like valve body on which a spring end of the compression spring 7 is supported, whereby the valve body kraftbeaufschlagt rests flat against the bottom 5.
  • the hydraulic fluid is displaced from the pressure chamber 4 via a self-adjusting leakage gap 9 between the piston 3 and an inner wall 10 of the housing 2 and enters a piston cylinder unit 1, not shown in FIG at least partially enclosing pantry.
  • the thereby adjusting increased pressure in the pressure chamber 4 presses a valve plate 13a of the hydraulic valve 8a against the bottom 5.
  • piston movement creates a suction in the pressure chamber 4, the opening of the valve plate 13a, whereby hydraulic fluid from the reservoir via the feed hole. 6 enters the pressure chamber 4.
  • FIG. 2 illustrates the installation position and the construction of the hydraulic valve 8a.
  • the disc-shaped valve forms an outer ring 12 a, which integrally with three radially outwardly directed centering lugs 11 a at the Inner wall 10 of the housing 2 is guided and thus centered.
  • the hydraulic valve 8a includes a valve plate 13a designed as a circular surface, which is connected elastically to the outer ring 12a via a tongue 14a configured as a web.
  • valve plate 13a lifts with minimal drag in the suction occurring in the pressure chamber 4 from the bottom 5 and thus unimpeded inflow of hydraulic fluid through the feed bore 6 designed as Nachsaugö réelle in the ground of the housing 2 allows.
  • FIGS. 3 and 4 show the hydraulic valve 8b in a three-dimensional representation. This centered about the outer ring 12b in the housing 12 hydraulic valve 8b includes comparable to the hydraulic valve 8a gem. 2 shows a tongue 14b, which connects the outer ring 12b with the pivotable valve plate 13b. The outer ring 12b is further integrally provided with two holding elements 18a, 18b, which limit in the folded position shown in Fig. 4 position, a travel and thus an opening degree of the valve plate 13b.
  • FIG. 5 is in the piston-cylinder unit acc. Fig. 1 used an alternatively constructed hydraulic valve 8c.
  • the disk 15 is as shown in FIG. 6, externally provided with three circumferentially distributed centering 11 c, for centering the compression spring 7 and simultaneous support on the bottom 5 of the housing 2.
  • the central opening 17 enclosing a disc 15 limits the Pivoting the valve plate 13c, wherein the tongue 14c produces an elastic connection.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Control Of Transmission Device (AREA)

Abstract

L'invention concerne une soupape hydraulique (8a), qui est intégrée en particulier dans un système de serrage hydraulique d'un entraînement à mécanisme de traction. La soupape hydraulique (8a) intégrée dans une chambre de pression (4) d'un logement (2) comprend une plaque de soupape (13a) se présentant sous la forme d'un disque et associée directement à un orifice d'amenée (6). La plaque de soupape (13a) permet, lors d'un courant d'aspiration dans la chambre de pression (4), un post-écoulement du fluide hydraulique par l'orifice d'amenée (6) situé dans la chambre de pression (4).
PCT/EP2007/061973 2006-11-24 2007-11-07 Soupape à plaquettes pour un système de serrage hydraulique WO2008061881A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006055466.3 2006-11-24
DE200610055466 DE102006055466A1 (de) 2006-11-24 2006-11-24 Plattenventil für ein hydraulisches Spannsystem

Publications (1)

Publication Number Publication Date
WO2008061881A1 true WO2008061881A1 (fr) 2008-05-29

Family

ID=39111924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/061973 WO2008061881A1 (fr) 2006-11-24 2007-11-07 Soupape à plaquettes pour un système de serrage hydraulique

Country Status (2)

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DE (1) DE102006055466A1 (fr)
WO (1) WO2008061881A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009025355B4 (de) 2008-07-02 2018-09-06 Schaeffler Technologies AG & Co. KG Spannvorrichtung für eine Kette und Überdruckventil
DE102011006601A1 (de) 2011-03-31 2012-10-04 Schaeffler Technologies Gmbh & Co. Kg Optimierte Dichtsitzkontur für ein Plattenventil einer Spannvorrichtung
DE102013004850B4 (de) 2013-03-05 2018-03-29 Iwis Motorsysteme Gmbh & Co. Kg Spannvorrichtung mit Blattfedermembran

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811468A (en) * 1972-03-10 1974-05-21 Fedders Corp Compressor valve assembly
DE2619516A1 (de) * 1976-05-03 1977-11-10 Siemens Ag Pumpe zur foerderung von gasfoermigem und/oder fluessigem helium mit mindestens einem selbsttaetigen ventil
FR2715205A1 (fr) * 1994-01-17 1995-07-21 Sachs Ind Sa Tendeur hydraulique pour lien sans fin, notamment pour chaîne de transmission de moteur à combustion interne.
DE19632383A1 (de) * 1995-08-18 1997-02-20 Borg Warner Automotive Integriertes Einlaß- und Druckentlastungsventil für hydraulische Kettenspanner an Motoren
FR2799811A1 (fr) * 1999-10-18 2001-04-20 Sachs Automotive France Sa Tendeur hydraulique pour lien sans fin, notamment pour chaine de transmission de moteur a combustion interne
EP1306554A2 (fr) * 2001-10-29 2003-05-02 Kelsey-Hayes Company Piston de pompe avec clapet non-retour
DE102004035452A1 (de) * 2004-07-22 2006-02-16 Robert Bosch Gmbh Kolbenpumpe mit verbesserter Druckaufbaudynamik

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695921C (de) * 1937-02-09 1940-09-06 Carl Friedrich Wilhelm Borgwar Antriebsvorrichtung mit hydraulischem Gestaenge fu
DE10019534A1 (de) * 2000-04-20 2001-10-25 Schaeffler Waelzlager Ohg Rückschlagventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811468A (en) * 1972-03-10 1974-05-21 Fedders Corp Compressor valve assembly
DE2619516A1 (de) * 1976-05-03 1977-11-10 Siemens Ag Pumpe zur foerderung von gasfoermigem und/oder fluessigem helium mit mindestens einem selbsttaetigen ventil
FR2715205A1 (fr) * 1994-01-17 1995-07-21 Sachs Ind Sa Tendeur hydraulique pour lien sans fin, notamment pour chaîne de transmission de moteur à combustion interne.
DE19632383A1 (de) * 1995-08-18 1997-02-20 Borg Warner Automotive Integriertes Einlaß- und Druckentlastungsventil für hydraulische Kettenspanner an Motoren
FR2799811A1 (fr) * 1999-10-18 2001-04-20 Sachs Automotive France Sa Tendeur hydraulique pour lien sans fin, notamment pour chaine de transmission de moteur a combustion interne
EP1306554A2 (fr) * 2001-10-29 2003-05-02 Kelsey-Hayes Company Piston de pompe avec clapet non-retour
DE102004035452A1 (de) * 2004-07-22 2006-02-16 Robert Bosch Gmbh Kolbenpumpe mit verbesserter Druckaufbaudynamik

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DE102006055466A1 (de) 2008-05-29

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