EP1646791B1 - Reversible steuervorrichtung zur verteilung von hochdruckfluid - Google Patents

Reversible steuervorrichtung zur verteilung von hochdruckfluid Download PDF

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Publication number
EP1646791B1
EP1646791B1 EP04767315A EP04767315A EP1646791B1 EP 1646791 B1 EP1646791 B1 EP 1646791B1 EP 04767315 A EP04767315 A EP 04767315A EP 04767315 A EP04767315 A EP 04767315A EP 1646791 B1 EP1646791 B1 EP 1646791B1
Authority
EP
European Patent Office
Prior art keywords
slide
plunger
pressure
push
rod
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP04767315A
Other languages
English (en)
French (fr)
Other versions
EP1646791A1 (de
Inventor
Antonio Fernandez
Gérard Laroze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth DSI SAS
Original Assignee
Bosch Rexroth DSI SAS
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 Bosch Rexroth DSI SAS filed Critical Bosch Rexroth DSI SAS
Priority to PL04767315T priority Critical patent/PL1646791T3/pl
Publication of EP1646791A1 publication Critical patent/EP1646791A1/de
Application granted granted Critical
Publication of EP1646791B1 publication Critical patent/EP1646791B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks

Definitions

  • the present invention relates to a device for dispensing pressurized fluid used, for example, to control one or more pressurized fluid user systems from a control member, in particular maneuvered by means of a pedal.
  • the invention relates to a device for dispensing pressurized fluid installed on board a public works machine.
  • Such pressurized fluid dispensing devices generally make it possible to increase the regulated pressure in the outlet pipe when the pusher is controlled towards its depressed position.
  • a known solution is to place the regulation on the opposite side to that desired at the control. In the neutral position, the pusher is then fully pressed and the pressure is maximum. In order to cause the decrease in pressure, it controls the raising of the pusher.
  • This device has the disadvantage of not exerting a positive action on the pusher so that it may become stuck in the depressed position. In addition, it is necessary to implement a second pusher that remembers the control member of the first pusher in the neutral position. The size of the device is then increased and the cost is high.
  • the present invention therefore aims to provide a pressurized fluid dispenser device which reduces the load in the outlet pipe when the pusher is actuated from its rest position to its depressed position.
  • the device for dispensing pressurized fluid is essentially characterized in that the pusher comprises a central bore which opens at the level of the foot of said pusher, in that the head of the plunger is mounted to move inside. the bore of the pusher, and in that the regulating spring is housed in the central bore of the pusher being interposed between the enlarged head of the plunger and the bottom of the cup, so that the depression of the pusher causes an expansion of the control spring and a decrease the value of the regulated pressure in the outlet pipe.
  • the dispensing device implements a single pusher which allows to control a pressure decrease in the outlet pipe by depression of the pusher.
  • the staged drawer comprises a central groove whose annular section increases in the direction of the free end of the drawer.
  • the slide comprises a central compensation bore which opens at the free end of the slide and which is connected to a transverse bore which opens into the main clearing chamber for at least temporary communication of said two chambers.
  • a channel external to the drawer is formed in the body to put in communication at least temporarily the two main and auxiliary chambers.
  • the throat of the slide is in permanent connection with the outlet pipe regardless of the axial position of the slide.
  • the pressure fluid dispensing device as shown in FIGS. 1 to 3, and generally designated by the reference numeral 1, comprises a body 2 in which is mounted at less a pressure reducer 3 and which, facing an upper face 4, supports a control member (not shown) able to modify the pressure regulated by the pressure reducer 3.
  • This pressure reducer 3 has, in a manner known per se, a pusher 5 which extends between a head 6 and a foot 7, and which is slidably mounted at the upper end 4 of the body 2, in a movement of back and forth between a rest position as shown in Figures 1 and 2, and a depressed position as shown in Figure 3.
  • the head 6 is biased by the control member to allow to control at least one organ receiver external to the device (not shown).
  • a distribution channel 10 is formed in the body 2 and extends between a first end 11 which opens into a main compensation chamber 15, and a second end 12 which opens into a blind auxiliary compensation chamber 16.
  • the main compensation chamber 15 is intended to be connected to a low-pressure fluid line 20 while the auxiliary compensation chamber 16 is blinded by means of, for example, a plug 18.
  • an inlet pipe 21 opens laterally into the distribution channel 10 and is intended to be connected to a source of high pressure fluid.
  • the pressure reducer 3 further comprises an outlet pipe 22 which opens into the distribution channel 10, and which is intended to be connected to the hydraulic receiver to be controlled.
  • the outlet pipe 22 is connected to the distribution channel 10 between the inlet pipe 21 and the auxiliary compensation chamber 16.
  • the pressure reducer 3 has a plunger 25 integral in displacement of a dispensing spool 30 between a start position of stroke and an end position to provide the pressure regulating function.
  • the plunger 25 extends between an enlarged head 26 and a connecting foot 27 at which the distribution spool 30 is connected forming a shoulder 28.
  • the plunger 25 is movable in translation inside the main compensation chamber 15.
  • the dispensing spool 30 has a first end 31 which is integral with the connecting foot 27 of the plunger 25 and a second free end 32 opposite the first end and which is turned towards the auxiliary compensation chamber 16.
  • the dispensing spool 30 and the plunger 25 may for example form a single piece.
  • a cup 35 is mounted coaxially with the plunger 25 while being in simple support against the foot 7 of the pusher 5.
  • a return spring 40 is housed in the main compensation chamber 15 to be interposed between the cup 35 and the bottom 17 of this main compensation chamber 15. This spring of reminder is coaxial to the cup and is located outside of it.
  • the pusher 5 is recessed over most of its length and has a central bore 45 which opens at the foot 7 of this pusher.
  • the pusher 5 may be a non-recessed piece which is extended by a hollow cylindrical body forming a liner. This hollow body is functionally similar to the hollow pusher over part of its length.
  • the foot 7 may then for example be integral with the cup instead of being integral with the pusher, the cup thus extending upwards, in the direction of the pusher.
  • the enlarged head 26 of the plunger 25 is movably mounted inside the central bore 45 of the pusher 5 and is urged towards the bottom of this bore by a regulating spring 50.
  • This regulating spring 50 is housed inside. the bore 45 of the pusher 5 being mounted concentrically to the plunger 25. It is interposed between the underside of the enlarged head 26 of the plunger 25 and the bottom 37 of the cup 35.
  • the plunger 25 thus extends to the Inside the regulating spring 50.
  • the enlarged head 26 is movably mounted inside the hollow body which acts as a jacket for this head.
  • the distribution spool 30 has on the one hand, an axial central bore 33 which opens at the free end 32 of this drawer to be connected to the auxiliary compensation chamber 16 and secondly, a transverse bore 34 which opens into the main compensation chamber 15 and which is connected to the axial bore 33.
  • the central bore 33 may be provided with a restriction 42 which opens into the auxiliary chamber 16.
  • the axial bores 33 and 34 transverse allow to put in permanent communication the two main compensation chamber 15 and auxiliary 16.
  • this permanent communication is obtained by replacing the two bores 33 and 34 with a channel 43 external to the drawer, being formed in the body 2 of the device 1.
  • This channel 43 is represented in FIGS. 1 to 3 in dashed lines .
  • the compensation slide 30 has, in its central part, a groove 37 whose annular section increases in the direction of the free end 32 of the slide 30.
  • This central groove 37 defines on the surface exterior of the spool 30 an upstream annular shoulder 38 and a downstream annular shoulder 39 which extend substantially transversely to the longitudinal axis of the spool.
  • the surface of the upstream shoulder 38 is smaller than the surface of the downstream shoulder 39 so that the increase of the pressure in the inlet pipe 21 causes the slide 30 to move towards the auxiliary compensation chamber 16 .
  • the central groove 37 is, regardless of the position of the distribution spool 30 inside the distribution channel 10, in permanent connection with the outlet pipe 22.
  • the drawer 30 is then in an equilibrium position in which it is no longer in abutment against the bottom of the cup, the shoulder 28 of this drawer having been removed from this bottom.
  • a so-called high pressure is then exerted in the outlet pipe 22.
  • this pressure exiting through the pipe 22 it is sufficient to control the depression of the pusher 5 by pressing on its head 6 (FIG. 3), this movement causes the compression spring 50 to relax.
  • the slide 30 can then again be in abutment against the bottom of the cup, by its shoulder 28.
  • the pressurized fluid dispenser according to the present invention thus enables the fluid pressure to be controlled in the outlet line 22 from a high value when the pusher is not depressed to a lower position when this pusher is pressed inside. of the clearing house.
  • the pressure regulation will thus be considered as inverted.
  • the regulating spring gives the spool valve a set point from bottom to top.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Coating Apparatus (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Nozzles (AREA)
  • Lift Valve (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Reciprocating Pumps (AREA)

Claims (5)

  1. Vorrichtung zum Verteilen von unter Druck stehender Flüssigkeit, die einen Körper (2) umfasst, der mindestens einen Druckminderer (3) aufnimmt und der an einer oberen Fläche (4) ein Steuerteil trägt, das dazu dient, den vom Druckminderer (3) geregelten Druck zu modifizieren, wobei der Druckminderer (3) umfasst:
    - einen Stößel (5), der sich zwischen einem Kopf (6) und einem Fuß (7) erstreckt, der im Bereich des oberen Endes (4) des Körpers (2) gleitend montiert ist für eine Hin- und Herbewegung zwischen einer Ruhestellung und einer eingetauchten Stellung, wobei der Kopf (6) durch die Steuereinrichtung betätigt wird, um die Steuerung mindestens eines Empfängerelements zu ermöglichen, das außerhalb der Vorrichtung liegt,
    - einen Verteilerkanal (10), der im Körper vorgesehen ist und an seinen Enden (11, 12) jeweils mit einer Hauptausgleichskammer (15) verbunden ist, die dazu dient, an eine Leitung (20) für Niederdruckflüssigkeit angeschlossen zu werden, sowie mit einer blinden Hilfsausgleichskammer (16) verbunden ist, wobei die Hauptausgleichskammer und die Hilfsausgleichskammer mindestens vorübergehend in Verbindung stehen,
    - eine Eingangsleitung (21), die in den Verteilerkanal (10) mündet und mit einer Quelle für Hochdruckflüssigkeit verbunden ist,
    - eine Ausgangsleitung (22), die in den Verteilerkanal (10) mündet und die dazu dient, mit dem zu steuernden Empfängerelement verbunden zu werden,
    - einen Tauchkolben (25), der im Innern der Ausgleichskammer verschiebbar ist und einen verbreiterten Kopf (26) sowie einen Verbindungsfuß (27) hat,
    - ein gestuftes Wegeventil (30), das bewegungsmäßig mit dem Tauchkolben (25) fest verbunden ist zwischen einer Hub-Anfangsstellung und einer HubEndstellung, um die Funktion der Druckregulierung zu gewährleisten, wobei das Wegeventil (30) ein ersten Ende (31) umfasst, das mit dem Verbindungsfuß (27) des Tauchkolbens (25) fest verbunden ist und eine Schulter (28) bildet, und ein zweites, freies Ende (32), das dem ersten Ende (31) gegenüber liegt und nach der Hilfsausgleichskammer (16) hin gerichtet ist,
    - eine Manschette (35), die koaxial zum Tauchkolben (25) montiert ist, wobei sie am Fuß (7) des Stößels (5) anliegt,
    - eine Rückholfeder (40), die in der Hauptausgleichskammer (15) angeordnet ist und die zwischen der Manschette (35) und dem Boden (17) der Hauptausgleichskammer (15) eingefügt ist und die Manschette (35) elastisch gegen den Stößel (5) drückt, und
    - eine Regulierfeder (50),
    dadurch gekennzeichnet, dass der Stößel (5) eine zentrale Bohrung (45) hat, die im Bereich des Fußes (7) dieses Stößels (5) mündet, und
    dadurch, dass der verbreiterte Kopf (26) des Tauchkolbens (25) beweglich im Inneren der Bohrung (45) des Stößels (5) montiert ist, und
    dadurch, dass die Regulierfeder (50) in der zentralen Bohrung (45) des Stößels (5) angeordnet ist, wobei sie zwischen dem verbreiterten Kopf (26) des Tauchkolbens (25) und dem Boden (36) der Manschette (35) so eingefügt ist, dass das Eintauchen des Stößels (25) eine Entspannung der Regulierfeder (50) und eine Verringerung der Stärke des geregelten Drucks in der Ausgangsleitung (22) bewirkt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das abgestufte Wegeventil (30) eine zentrale Auskehlung (37) hat, deren ringförmiger Querschnitt in Richtung auf das freie Ende (32) des Wegeventils (30) hin größer wird.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Wegeventil (30) eine zentrale Ausgleichsbohrung (33) hat, die am freien Ende (32) des Wegeventils mündet und die mit einer Querbohrung (34) verbunden ist, die in die Hauptausgleichskammer (15) mündet, um diese zwei Kammern zumindest vorübergehend in Verbindung zu bringen.
  4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass im Körper (2) ein Kanal (43) außerhalb des Wegeventils (30) ausgeführt ist, um die Hauptausgleichskammer (15) und die Hilfsausgleichskammer (16) zumindest vorübergehend in Verbindung zu bringen.
  5. Vorrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Auskehlung (37) des Wegeventils (30) permanent verbunden ist mit der Ausgangsleitung (22), und zwar unabhängig von der axialen Stellung des Wegeventils (30).
EP04767315A 2003-07-18 2004-06-10 Reversible steuervorrichtung zur verteilung von hochdruckfluid Expired - Lifetime EP1646791B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04767315T PL1646791T3 (pl) 2003-07-18 2004-06-10 Urządzenie rozdzielające płyn pod ciśnieniem, o regulacji odwrotnej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308825A FR2857705B1 (fr) 2003-07-18 2003-07-18 Dispositif distributeur de fluide sous pression a regulation inversee
PCT/FR2004/001450 WO2005017365A1 (fr) 2003-07-18 2004-06-10 Dispositif distributeur de fluide sous pression a regulation inversee

Publications (2)

Publication Number Publication Date
EP1646791A1 EP1646791A1 (de) 2006-04-19
EP1646791B1 true EP1646791B1 (de) 2006-11-08

Family

ID=33548266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767315A Expired - Lifetime EP1646791B1 (de) 2003-07-18 2004-06-10 Reversible steuervorrichtung zur verteilung von hochdruckfluid

Country Status (6)

Country Link
EP (1) EP1646791B1 (de)
AT (1) ATE344884T1 (de)
DE (1) DE602004003148T2 (de)
FR (1) FR2857705B1 (de)
PL (1) PL1646791T3 (de)
WO (1) WO2005017365A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMO20050247A1 (it) 2005-09-29 2007-03-30 Studio Tecnico 6M Srl Valvola per la frenatura idraulica di macchine operatrici o simili
DE102010006196A1 (de) * 2010-01-29 2011-08-04 Robert Bosch GmbH, 70469 Hydraulisches Vorsteuergerät

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07103942B2 (ja) * 1988-03-31 1995-11-08 株式会社小松製作所 油圧パイロットバルブ装置
US5251534A (en) * 1992-04-29 1993-10-12 Kayaba Industry Co. Ltd. Input apparatus
FR2781846B1 (fr) * 1998-07-28 2002-03-01 Mannesmann Rexroth Sa Dispositif distributeur de fluide notamment pour telecommande hydraulique

Also Published As

Publication number Publication date
DE602004003148D1 (de) 2006-12-21
EP1646791A1 (de) 2006-04-19
FR2857705B1 (fr) 2005-09-30
DE602004003148T2 (de) 2007-08-02
ATE344884T1 (de) 2006-11-15
WO2005017365A1 (fr) 2005-02-24
FR2857705A1 (fr) 2005-01-21
PL1646791T3 (pl) 2007-04-30

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