EP0751302B1 - Système d'encliquetage électrohydraulique pour un distributeur - Google Patents

Système d'encliquetage électrohydraulique pour un distributeur Download PDF

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Publication number
EP0751302B1
EP0751302B1 EP96100141A EP96100141A EP0751302B1 EP 0751302 B1 EP0751302 B1 EP 0751302B1 EP 96100141 A EP96100141 A EP 96100141A EP 96100141 A EP96100141 A EP 96100141A EP 0751302 B1 EP0751302 B1 EP 0751302B1
Authority
EP
European Patent Office
Prior art keywords
pressure
electrohydraulic
valve
locking
longitudinal slide
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
EP96100141A
Other languages
German (de)
English (en)
Other versions
EP0751302A3 (fr
EP0751302A2 (fr
Inventor
Wolfgang Dipl.-Ing. Koetter
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0751302A2 publication Critical patent/EP0751302A2/fr
Publication of EP0751302A3 publication Critical patent/EP0751302A3/fr
Application granted granted Critical
Publication of EP0751302B1 publication Critical patent/EP0751302B1/fr
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

Definitions

  • the invention is based on an electro-hydraulic locking system according to the preamble of the main claim.
  • a hydraulic valve provided with a locking mechanism is known from EP 0 394 860 B1.
  • the valve has a longitudinal slide, on and in one end of which a multiple locking mechanism with radially locking locking balls is arranged.
  • the locking balls sit in radial bores which lie in a cross-sectional plane of the tubular end of the longitudinal slide.
  • the locking recesses are located in the valve housing.
  • a spring-centered locking piston is arranged in the tubular end of the longitudinal slide and can be pressurized with hydraulic oil on the back.
  • the locking piston has a groove for receiving the locking ball.
  • the groove has a phase towards the back. With the help of the wedge effect of the phase, the locking balls can be pressed radially outwards in order to lock them into a housing groove.
  • a latching control valve which can be actuated by an operator and via which the hydraulic oil pressure can be controlled by means of a rotary knob in such a way that either the latching is switched on or off, or the latching is released when the pressure is too high.
  • the latching system according to the invention should have a modular structure be so that it with certain working valve series and their Variants can be combined.
  • the locking system should all Control, switching and sensor elements have one or more Need latching units.
  • the locking system should be like this be constructed so that it is possible - without modifications directly on Working valve - additional boundary conditions for locking individual switch positions.
  • Also supposed to the one or more pressurized locking units have a low pressure medium consumption.
  • the locking system corresponding to the characteristic ones
  • Features of the first claim from several individual elements and / or assemblies, most of which are immediate are arranged on the working valve. These are, for example the individual latching units and the sensor or sensors for Detection of the individual switching positions of the valve spool.
  • the locking elements on a longitudinal slide valve, for example the latching units have a latching contour attached to the longitudinal slide from.
  • the scanning can with respect to the arrangement of the Locking elements or locks, etc. done both radially or axially.
  • the sensors for detecting the individual switch positions of the Longitudinal slides are mechanical, optical, inductive or magnetic Scanning systems. All scanning systems give according to the signals that can be evaluated electrically in each switching position.
  • VDI 2253 An embodiment for a latching unit is shown in VDI 2253 a locking mechanism with double-sided locking direction and changeable Holding force with combined positive and non-positive Blocking.
  • the locking mechanism is, for example, more radial Single ratchet trained.
  • the the locking element or the Locking spring is loaded with the help of a pressure medium piston tensioned.
  • the latching unit has a spring load a low residual holding force due to manual Working valve actuation can be overcome.
  • the characteristics of the further subclaims relate to on the design of the module for detecting the slide position of the working valve and the arrangement and connection of controlling pressure sensors.
  • the locking unit which is pressurized by pressure, needs only as much leverage as is necessary to to clamp the corresponding locking element.
  • a working valve In the middle of the hydraulic circuit diagram according to FIG. 1 is a working valve, a 5/4-way valve (10) shown.
  • the working valve (10) is used here to control a double-acting cylinder (1) used.
  • the valve housing is on the consumer side through the work ports (A, B) and the working lines (3, 4) with the cylinder (1) connected while on the other hand at least a pressure medium line (80) and a return line (81) are connected is.
  • the freewheeling position "F” is arranged.
  • the working lines are via this switch position (3, 4) relieved together in the return line (81).
  • the pressure medium line (80) is blocked at the same time.
  • the 5/4-way valve (10) has a control connection (Y) with a control or signal line (82) connected to it, via the flow positions "1" and “2" the working pressure or in the freewheeling position “F” and the blocking zero position “0" the return pressure can be measured.
  • the longitudinal slide is in its locked zero position "0" Help from the two longitudinal slide end faces Return springs (18) and (19) held or centered.
  • the longitudinal slide has the other switching positions for example a manual actuator (11), such as it is arranged here on the right longitudinal slide face.
  • a manual actuator (11) such as it is arranged here on the right longitudinal slide face.
  • the switching contour (12) is, for example scanned using a roller plunger (61), the actuated an electrical switch (60).
  • the symbolically represented Switching contour (12) here has three switching levels.
  • the middle one Level at which the roller tappet (61) according to FIG. 1 currently is present, corresponds to the blocking zero position. That on the switching contour (12) to the right of the middle level Level is used for electrical detection of the flow position "1", while the highest level is above the Switch (60) recognizes the flow position "2".
  • the second middle level to the left of the highest level, scans the roller plunger (61) in the freewheel position.
  • a notch bar (14) with three notches (15, 16) and (17).
  • the latching unit (40) comprises a housing in which the Locking element (41) is mounted to be longitudinally displaceable.
  • One in Coil spring (42) supporting the housing presses the locking element against the catch bar (14).
  • the actuating device (11) is operated or the longitudinal slide be moved.
  • the notches (15) on the top of the notch bar and (16) act to lock the longitudinal slide in the flow positions "1" and “2” together with the locking unit (30).
  • a spring-loaded locking element (31) engages in the respective notch (15) or (16).
  • This is supported Locking element (31) via a helical spring (32) on a rear piston (33) pressurizable with pressure medium.
  • the piston (33) is located together with the locking element (31) and Coil spring (32) in a comparable to a stepped cylinder Housing (34).
  • the housing is in the area of the piston (33) (34) designed as a pressure medium cylinder (35). It contains the pressure medium space (36).
  • the latter has a larger diameter than the housing (34) in the region of the latching element (31). Thereby can the stroke of the piston (33) to the length of the pressure medium space (36) can be limited.
  • the pressure medium cylinder (35) is via a hydraulic line (88) connected to a 3/2-way valve (50).
  • This auxiliary or connecting valve (50) is actuated by means of an electromagnet (51), which acts against the force of a return spring (52).
  • the pressure medium chamber (36) relieved in lines (87) and (88). At the same time is one pressure medium line (86) leading to the valve (50) is blocked.
  • Pressure sensor (67) arranged for the maximum pressure medium pressure.
  • a pressure reducing valve (63) is integrated in the branching pressure medium line (86). It limits the control pressure to approx. 20 x 10 5 N / m 2 .
  • the latching individually for each of the two flow positions with, for example, manually operated switches (71) and (72) can be selected.
  • each switch (71) or (72) a changeover switch (73) or (74) arranged in series, with which a maximum pressure-dependent unlatching is activated can be.
  • This is in the respective line section for the maximum pressure-dependent unlatching a maximum pressure switch with switching delay (75) or (76) installed.
  • Both Maximum pressure switches are here controlled by a pressure and time Actuator (69) actuated.
  • the maximum pressure-dependent unlatching enables one, for example an unintended load-side pressure increase an unlock the latching unit (30). With the help of the delayed The maximum pressure switches (75) and (76) can be activated accidental unlocking due to short, high pressure peaks avoid.
  • the 5/4-way valve (10) in a continuous position stands and actuates at least one latching switch (71, 72) is, the electromagnetic actuator (51) of the 3/2-way valve (50) energized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Fluid-Driven Valves (AREA)

Claims (8)

  1. Système d'encliquetage électromagnétique pour une soupape distributrice (10) actionnée au moins mécaniquement comprenant :
    un tiroir longitudinal occupant dans un boítier de soupape au moins deux positions de commutation (1, 2),
    au moins une unité d'encliquetage (30, 40) équipée d'un élément d'arrêt chargé par un ressort et par un fluide sous pression pour assurer l'arrêt dans ces deux positions de commutation par encliquetage dans au moins une encoche d'arrêt (15, 16), un ressort d'arrêt (32) chargeant l'élément d'arrêt pouvant être mis sous tension par le piston mobile (33) d'un vérin à fluide sous pression (35),
    caractérisé en ce qu'
    en amont du vérin à fluide sous pression (35) est montée une soupape, (50) manoeuvrable électriquement pour commander le fluide sous pression,
    dans le boítier de soupape est monté au moins un groupe constructif (11, 12, 60, 61) pour effectuer la saisie interprétable électriquement d'au moins une position de commutation du tiroir longitudinal,
    pour encliqueter le tiroir longitudinal dans la position de commutation concernée, il existe chaque fois au moins un élément électrique de commutation (71, 74),
    au moins la position de commutation du tiroir longitudinal et la positon du contacteur des éléments de commutation (71 à 74) commandent la mise en circuit de la soupape (50),
    toutes les parties concernant le système d'encliquetage sont des groupes modulaires, démontables, installés sur la soupape distributrice (10) ou dans l'environnement immédiat de celle-ci.
  2. Système d'encliquetage selon la revendication 1,
    caractérisé en ce qu'
    il comprend au moins une unité d'encliquetage (30, 40), un cliquet d'arrêt (15 à 17; 31; 41) arrêtant dans les deux sens et disposant d'une force de maintien variable, avec blocage mariant à la fois la combinaison de formes et d'adhérence.
  3. Système d'encliquetage selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    l'unité d'encliquetage (30) chargée par un ressort et par le fluide sous pression présente, quand elle est chargée par le seul ressort, une force résiduelle de maintien faible.
  4. Système d'encliquetage selon la revendication 1,
    caractérisé en ce que
    le groupe constructif (60, 61), pour effectuer une détection interprétable électriquement d'au moins une position de commutation du tiroir longitudinal, explore mécaniquement un contour de commutation (12) situé sur le tiroir longitudinal ou intégré au contour de celui-ci.
  5. Système d'encliquetage selon la revendication 1,
    caractérisé en ce que
    dans une conduite de fluide sous pression (80) menant à la soupape distributrice (10) sont montés un détecteur de pression minimale (66) et un détecteur de pression maximale (67) qui, quand la pression sort par le bas ou par le haut d'une plage prédéterminée, empêchent ou interrompent l'alimentation de l'actionnement électrique de la soupape (50).
  6. Système d'encliquetage selon la revendication 5,
    caractérisé en ce qu'
    au moins un organe de positionnement (69) complémentaire à temporisation est connecté en aval au détecteur de pression maximale (67).
  7. Système d'encliquetage selon la revendication 1,
    caractérisé en ce qu'
    une autre unité d'encliquetage (40) chargée par un ressort est montée dans la zone du tiroir longitudinal.
  8. Système d'encliquetage selon la revendication 1,
    caractérisé en ce que
    la force de maintien de l'unité d'encliquetage (40) peut être réglée en tendant mécaniquement le ressort d'arrêt (42).
EP96100141A 1995-06-28 1996-01-08 Système d'encliquetage électrohydraulique pour un distributeur Expired - Lifetime EP0751302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19523456 1995-06-28
DE19523456A DE19523456A1 (de) 1995-06-28 1995-06-28 Elektrohydraulisches Verrastungssystem für ein Wegeventil

Publications (3)

Publication Number Publication Date
EP0751302A2 EP0751302A2 (fr) 1997-01-02
EP0751302A3 EP0751302A3 (fr) 1999-04-28
EP0751302B1 true EP0751302B1 (fr) 2003-04-09

Family

ID=7765439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100141A Expired - Lifetime EP0751302B1 (fr) 1995-06-28 1996-01-08 Système d'encliquetage électrohydraulique pour un distributeur

Country Status (2)

Country Link
EP (1) EP0751302B1 (fr)
DE (2) DE19523456A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2669557A2 (fr) 2012-05-29 2013-12-04 Robert Bosch Gmbh Dispositif d'arrêt pour une soupape à tiroir
DE102016202304A1 (de) 2016-02-16 2017-08-17 Robert Bosch Gmbh Wegeventil mit elektromagnetisch betätigter Rastung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19858482A1 (de) * 1998-12-18 2000-06-29 Mannesmann Rexroth Ag Hydraulisches Ventil, insbesondere hydraulisches Wege-Sitzventil
US8109356B2 (en) 2007-09-24 2012-02-07 Clark Equipment Company Auxiliary hydraulic flow control system for a small loader
CN108167511A (zh) * 2018-02-12 2018-06-15 无锡智能自控工程股份有限公司 远程集中操作液压手动机构
CN108980233A (zh) * 2018-09-20 2018-12-11 岭南师范学院 一种电液控制式机械轮体锁止机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195551A (en) * 1977-06-23 1980-04-01 Gresen Manufacturing Company Hydraulic control valve including electromagnetic detent
DE3125482A1 (de) * 1981-06-29 1983-01-13 Günter Till Präzisionsmechanik, 3330 Helmstedt "steuerschieber"
DE3801072C1 (fr) * 1988-01-15 1989-06-15 Mannesmann Rexroth Gmbh, 8770 Lohr, De

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2669557A2 (fr) 2012-05-29 2013-12-04 Robert Bosch Gmbh Dispositif d'arrêt pour une soupape à tiroir
DE102012208943A1 (de) 2012-05-29 2013-12-05 Robert Bosch Gmbh Rastvorrichtung für ein Schieberventil
US9328844B2 (en) 2012-05-29 2016-05-03 Robert Bosch Gmbh Detent mechanism for a sliding valve
DE102016202304A1 (de) 2016-02-16 2017-08-17 Robert Bosch Gmbh Wegeventil mit elektromagnetisch betätigter Rastung

Also Published As

Publication number Publication date
DE59610323D1 (de) 2003-05-15
EP0751302A3 (fr) 1999-04-28
DE19523456A1 (de) 1997-01-02
EP0751302A2 (fr) 1997-01-02

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