EP1556618B1 - Pressurized fluid distributor - Google Patents

Pressurized fluid distributor Download PDF

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Publication number
EP1556618B1
EP1556618B1 EP03780237A EP03780237A EP1556618B1 EP 1556618 B1 EP1556618 B1 EP 1556618B1 EP 03780237 A EP03780237 A EP 03780237A EP 03780237 A EP03780237 A EP 03780237A EP 1556618 B1 EP1556618 B1 EP 1556618B1
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EP
European Patent Office
Prior art keywords
armature
fluid distributor
push
rod
window
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
EP03780237A
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German (de)
French (fr)
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EP1556618A1 (en
Inventor
Vincent Ligneau
Ludovic Veyret
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
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Bosch Rexroth DSI SAS
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Publication of EP1556618A1 publication Critical patent/EP1556618A1/en
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87056—With selective motion for plural valve actuator
    • Y10T137/87064—Oppositely movable cam surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87056—With selective motion for plural valve actuator
    • Y10T137/87072—Rotation about either of two pivotal axes

Definitions

  • the present invention relates to pressurized fluid dispensers which are used to enable the control, from a manually operated member, of one or more downstream devices which operate with a fluid under pressure.
  • the invention relates to hydraulic manipulators which are intended to control a variety of hydraulic functions of a public works machine, for example.
  • a first disadvantage lies in a disengagement (hereinafter also called tearing) unwanted armature out of the solenoid means. Indeed, during worksite trips of public works machinery, the distributor mounted on board such machines undergoes accelerations and decelerations which induce on the armature pulling forces greater than the force of attraction exerted on this armature by the magnetic field. This is further accentuated by the inertia of the control member.
  • a second disadvantage lies in the fact that the operator can, during the tearing phase, not having to exert an action with a predetermined force on the control member. He does not know exactly when the armature was disengaged from the solenoid.
  • the present invention is intended in particular to overcome these disadvantages by providing a fluid distributor for which the phase of disengaging the armature from the solenoid can occur only with a force maintained at a predetermined level and by means simple, effective and inexpensive.
  • a fluid dispenser of the aforementioned type is essentially characterized in that it further comprises means for attaching the armature to the finger which delimit a window in which the finger protrudes substantially. transversely, in that the pusher is mounted traversing with play in the armature to project into the window, and in that the finger is interposed between the hooking means and the pusher.
  • the armature is suspended under the finger of the control member so that the number of degrees of freedom of the armature is increased.
  • the latter is free to shift relative to the surrounding component parts, so that the armature remains in contact with the solenoid means over its entire surface.
  • the force of attraction magnetic force exerted on the armature remains at a constant predetermined level.
  • the attachment means and the frame together define the window.
  • the attachment means comprise a stirrup which defines the upper amount and the side walls of the window, the lower amount of the window being defined by the armature.
  • the finger is in point contact with the upper amount of the window.
  • the finger comprises a spherical tip on which the upper amount of the window bears.
  • the armature comprises a washer made of ferrous material.
  • stirrup is overmolded on the washer.
  • stirrup and the frame came together.
  • the upper amount and the side walls are reported by screwing on the washer.
  • the side walls are then in the form of open chutes in which are housed screws.
  • a fluid dispenser under pressure and more particularly a hydraulic manipulator, is shown in Figure 1.
  • the fluid is delivered to a downstream device not shown under a pressure that is adapted to the use that is made of it.
  • the pressurized fluid distributor comprises at least one pressure reducer 2.
  • pressure reducer 2 Preferably and as is commonly encountered in hydraulic manipulators for public works machinery, it is equipped with four pressure reducers identical to each other. Only two of these reducers are shown in Figure 1.
  • Each pressure reducer 2 comprises a plunger 3 that can move in a cavity 4 formed in the body 5 of the dispenser.
  • the setting of the pressure reducer is controlled by an operator by the action on a control member 6 (partially shown in Figure 1).
  • This control member is mounted on a hinge 7 which is carried by the body 5 of the distributor 1, at one of the faces 8 of the body 5.
  • This joint is for example of the cardan type, a spherical joint, or still a pivot link.
  • the cavity 4 has an end 9 which opens on the face 8 of the body 5.
  • the control member 6 has, moreover, a finger 10 which extends from the joint 7 to project substantially to the plumb of the plunger 3 mounted in the cavity 4.
  • the pressure reducer comprises, in a manner known per se, a pusher 11 and a regulation spring 12 so that under the action of the control member 6, the pusher 11 has a translational movement back and forth inside the cavity 4, at the open end 9 of this cavity.
  • control member 6 allows to change the position of the pusher 11 to control the setting of the pressure reducer and therefore the value of the pressure delivered by the distributor to the downstream device (not shown).
  • the pressurized fluid dispenser has solenoid means 15 cooperating with a frame 16 to lock the pusher 3 in position in a predefined position.
  • the solenoid means 15 consist for example of a coil. This coil is mounted in the body 5 substantially coaxially with the pusher 11. One end of this coil is open at the face 8 of the body 5 to define a bearing surface 17 substantially coplanar with this face. This bearing surface 17 can still be slightly recessed with respect to the face 8, while being substantially parallel to this face.
  • the coil 15 thus delivers a magnetic field in a direction substantially parallel to the direction of translation of the pusher 11.
  • the armature 16 is adapted to be driven in translation simultaneously with the pusher 11 and is made of a material sensitive to the magnetic field, such as a ferrous material.
  • This armature has a contact surface 18 which is located facing the bearing surface 17 so as to abut against this bearing surface 17 in a predefined position of the pusher 11. In this position, the pusher is thus blocked. with a predetermined force of attraction between the armature and the coil.
  • the fluid dispenser 1 furthermore has means 20 for fastening the armature 16 to the finger 10 of the control member 6.
  • These attachment means make it possible to join in motion the armature 16 with the finger 10, so that the armature 16 is mounted somehow in suspension under the finger 10.
  • This armature thus has five degrees of freedom so that its contact surface 18 is permanently parallel to the surface support 17 of the coil and this, despite a possible slight offset between the axis of the pusher 11 and the direction of the force exerted by the finger 10 on the attachment means 20 during movement of the pusher.
  • the attachment means 20 take the form of a stirrup 25 located above the frame 16 to define, with this frame, the window 21.
  • the upper amount 26 and the side walls 27 and 28 are thus defined by the stirrup 25, while the lower amount 29 of this window is defined by the armature 16.
  • the stirrup 25 is in point contact with the finger 10 at the upper post 26 of the window 21.
  • the finger 10 has a spherical tip 30. More particularly, this tip is for example hemispherical, so that the upper post 26 bears almost punctally on the spherical portion of the tip 30.
  • the pusher 11 is in abutment against the tip 30 according to a point contact, opposite the contact between the tip 30 and the upper post 26.
  • stirrup 25 and the washer 16 are integral material.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manipulator (AREA)
  • Magnetically Actuated Valves (AREA)
  • Coating Apparatus (AREA)
  • Electromagnets (AREA)
  • Servomotors (AREA)
  • Safety Valves (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Nozzles (AREA)
  • Fluid-Damping Devices (AREA)
  • Catching Or Destruction (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

The distributor consists of a housing (5) containing at least one pressure reducer (2) with a push rod (11) and plunger (3), a control member (6), a solenoid (15) and an armature (16). It incorporates a coupling with an aperture to engage the armature with a transverse pin (10), and the push rod passes through the armature with a clearance and into the coupling aperture, so that the pin is held between the coupling and push rod.

Description

La présente invention est relative aux distributeurs de fluide sous pression qui sont utilisés pour permettre la commande, à partir d'un organe manoeuvré à la main, d'un ou plusieurs dispositifs avals qui fonctionnent avec un fluide sous pression.The present invention relates to pressurized fluid dispensers which are used to enable the control, from a manually operated member, of one or more downstream devices which operate with a fluid under pressure.

Plus particulièrement, l'invention concerne les manipulateurs hydrauliques qui sont destinés à assurer la commande de différentes fonctions hydrauliques d'un engin de travaux publics par exemple.More particularly, the invention relates to hydraulic manipulators which are intended to control a variety of hydraulic functions of a public works machine, for example.

On connaît, notamment d'après le document WO-96/30652, un distributeur de fluide du type comprenant :

  • un corps comportant au moins une cavité dont une extrémité est débouchante sur au moins une face du corps,
  • au moins un réducteur de pression qui est monté dans le corps, et qui comprend un poussoir monté mobile au niveau de l'extrémité débouchante, un plongeur monté dans la cavité et un ressort de régulation interposé entre le poussoir et le plongeur, ledit plongeur étant monté oscillant en translation pour assurer la fonction de réducteur de pression, et dont l'équilibre dépend de la compression du ressort de régulation imposée par l'enfoncement du poussoir et de la pression de régulation en sortie à délivrer vers un dispositif aval,
  • un organe de commande propre à modifier l'enfoncement du poussoir pour commander la valeur de la pression délivrée, l'organe de commande étant monté pivotant en regard de ladite face du corps et comprenant au moins un doigt,
  • des moyens formant solénoïde qui sont aptes à délivrer un champ magnétique selon une direction sensiblement parallèle à direction de translation du plongeur, qui sont montés dans le corps en étant sensiblement coaxiaux avec le poussoir et qui définissent une surface d'appui sensiblement coplanaire à ladite face du corps,
  • une armature apte à être entraînée en translation simultanément au poussoir, réalisée en un matériau sensible au champ magnétique, et qui comprend une surface de contact située en regard de la surface d'appui appartenant aux moyens formant solénoïde, de manière à venir en butée contre cette surface d'appui pour bloquer en position le poussoir avec un force d'attraction prédéterminée.
It is known, in particular from WO-96/30652, a fluid dispenser of the type comprising:
  • a body having at least one cavity, one end of which opens on at least one face of the body,
  • at least one pressure reducer which is mounted in the body, and which comprises a pusher mounted movably at the outlet end, a plunger mounted in the cavity and a control spring interposed between the pusher and the plunger, said plunger being oscillatingly mounted in translation to ensure the function of pressure reducer, and whose equilibrium depends on the compression of the control spring imposed by the depression of the pusher and the output control pressure to be delivered to a downstream device,
  • a control member capable of modifying the depression of the pusher to control the value of the pressure delivered, the control member being pivotally mounted facing said face of the body and comprising at least one finger,
  • solenoid means which are capable of delivering a magnetic field in a direction substantially parallel to the translation direction of the plunger, which are mounted in the body being substantially coaxial with the pusher and which define a bearing surface substantially coplanar with said face from the body,
  • an armature adapted to be driven in translation simultaneously with the pusher, made of a material sensitive to the magnetic field, and which comprises a contact surface located opposite the bearing surface belonging to the solenoid means, so as to abut against this bearing surface for locking in position the pusher with a predetermined attraction force.

Dans de tels distributeurs de fluide, un premier inconvénient réside dans un désengagement (également appelé ci-après arrachage) intempestif de l'armature hors des moyens formant solénoïde. En effet, lors des déplacements sur chantiers des engins de travaux publics, le distributeur monté à bord de tels engins subit des accélérations et décélérations qui induisent sur l'armature des forces d'arrachage supérieures à la force d'attraction exercée sur cette armature par le champ magnétique. Ceci est encore accentué par l'inertie de l'organe de commande.In such fluid distributors, a first disadvantage lies in a disengagement (hereinafter also called tearing) unwanted armature out of the solenoid means. Indeed, during worksite trips of public works machinery, the distributor mounted on board such machines undergoes accelerations and decelerations which induce on the armature pulling forces greater than the force of attraction exerted on this armature by the magnetic field. This is further accentuated by the inertia of the control member.

Un deuxième inconvénient réside dans le fait que l'opérateur peut, lors de la phase d'arrachage, ne pas avoir à exercer une action avec une force prédéterminée sur l'organe de commande. Il ne sait ainsi donc pas avec précision à quel moment l'armature a été désengagée du solénoïde.A second disadvantage lies in the fact that the operator can, during the tearing phase, not having to exert an action with a predetermined force on the control member. He does not know exactly when the armature was disengaged from the solenoid.

Ces inconvénients sont dus au fait que l'armature est généralement fixée rigidement sur le poussoir de sorte qu'elle ne possède pas de degrés de liberté en rotation autour d'axes horizontaux. En phase d'arrachage, l'armature n'est ainsi en contact avec le solénoïde que sur une partie de la surface d'appui de sorte que la force d'attraction du champ magnétique sur l'armature est diminuée à une valeur inconnue inférieure à la force prédéterminée.These disadvantages are due to the fact that the armature is generally fixed rigidly on the pusher so that it does not have degrees of freedom in rotation about horizontal axes. In tearing phase, the armature is thus in contact with the solenoid only on a portion of the bearing surface so that the magnetic field attraction force on the armature is decreased to a lower unknown value to the predetermined force.

La présente invention a notamment pour but de pallier ces inconvénients en fournissant un distributeur de fluide pour lequel la phase de désengagement de l'armature hors du solénoïde ne puisse se produire qu'avec une force maintenue à un niveau prédéterminé et ce, par des moyens simples, efficaces et peu coûteux.The present invention is intended in particular to overcome these disadvantages by providing a fluid distributor for which the phase of disengaging the armature from the solenoid can occur only with a force maintained at a predetermined level and by means simple, effective and inexpensive.

A cet effet, selon l'invention, un distributeur de fluide du type précité est essentiellement caractérisé en ce qu'il comprend en outre des moyens d'accrochage de l'armature sur le doigt qui délimitent une fenêtre dans laquelle le doigt fait saillie sensiblement transversalement, en ce que le poussoir est monté traversant avec jeu dans l'armature pour faire saillie dans la fenêtre, et en ce que le doigt est interposé entre les moyens d'accrochage et le poussoir.For this purpose, according to the invention, a fluid dispenser of the aforementioned type is essentially characterized in that it further comprises means for attaching the armature to the finger which delimit a window in which the finger protrudes substantially. transversely, in that the pusher is mounted traversing with play in the armature to project into the window, and in that the finger is interposed between the hooking means and the pusher.

Grâce à ces dispositions, l'armature est suspendue sous le doigt de l'organe de commande de sorte que le nombre de degrés de liberté de l'armature est augmenté. Ainsi, lors du désengagement de cette armature hors du solénoïde, celle-ci est libre de se décaler par rapport aux pièces constitutives environnantes, de sorte que l'armature reste en contact avec les moyens formant solénoïde sur toute sa surface. La force d'attraction magnétique exercée sur l'armature reste donc à un niveau prédéterminé constant.Thanks to these provisions, the armature is suspended under the finger of the control member so that the number of degrees of freedom of the armature is increased. Thus, during the disengagement of this armature from the solenoid, the latter is free to shift relative to the surrounding component parts, so that the armature remains in contact with the solenoid means over its entire surface. The force of attraction magnetic force exerted on the armature remains at a constant predetermined level.

Dans un mode de réalisation préféré, les moyens d'accrochage et l'armature délimitent ensemble la fenêtre.In a preferred embodiment, the attachment means and the frame together define the window.

De préférence, les moyens d'accrochage comprennent un étrier qui définit le montant supérieur et les parois latérales de la fenêtre, le montant inférieur de la fenêtre étant défini par l'armature.Preferably, the attachment means comprise a stirrup which defines the upper amount and the side walls of the window, the lower amount of the window being defined by the armature.

Encore de préférence, le doigt est en contact ponctuel avec le montant supérieur de la fenêtre.Still preferably, the finger is in point contact with the upper amount of the window.

En variante, le doigt comprend un embout sphérique sur lequel le montant supérieur de la fenêtre vient en appui.Alternatively, the finger comprises a spherical tip on which the upper amount of the window bears.

De manière préférée, l'armature comprend une rondelle réalisée en matériau ferreux.Preferably, the armature comprises a washer made of ferrous material.

En variante, l'étrier est surmoulé sur la rondelle.Alternatively, the stirrup is overmolded on the washer.

Dans encore une autre variante, l'étrier et l'armature sont venus de matière ensemble.In yet another variant, the stirrup and the frame came together.

Encore en variante, le montant supérieur et les parois latérales sont rapportés par vissage sur la rondelle.Alternatively, the upper amount and the side walls are reported by screwing on the washer.

De préférence, les parois latérales sont alors en forme de goulottes ouvertes dans lesquelles sont logées des vis.Preferably, the side walls are then in the form of open chutes in which are housed screws.

D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante de quatre de ses formes de réalisation, données à titre d'exemples non limitatifs, en regard des dessins joints, sur lesquels :

  • La figure 1 est une vue en coupe partielle d'un distributeur de fluide équipé d'une armature selon la présente invention.
  • La figure 2 est une vue de côté, en partie en coupe, de l'armature montée sur le doigt de l'organe de commande.
  • La figure 3 est une vue en coupe de l'armature munie de moyens d'accrochage selon la présente invention.
  • Les figures 4 et 5 sont des vues de côté et de dessus d'une deuxième forme de réalisation des moyens d'accrochage de l'armature selon la présente invention.
  • Les figures 6 et 7 sont des vues analogues aux figures 4 et 5, d'un troisième mode de réalisation des moyens d'accrochage selon la présente invention.
  • Les figures 8 et 9 sont des vues analogues aux vues 4 et 5 d'un quatrième mode de réalisation des moyens d'accrochage de l'armature selon la présente invention.
Other features and advantages of the invention will emerge during the following description of four of its embodiments, given by way of non-limiting examples, with reference to the accompanying drawings, in which:
  • Figure 1 is a partial sectional view of a fluid dispenser equipped with a frame according to the present invention.
  • Figure 2 is a side view, partly in section, of the armature mounted on the finger of the control member.
  • Figure 3 is a sectional view of the armature provided with attachment means according to the present invention.
  • Figures 4 and 5 are side and top views of a second embodiment of the attachment means of the frame according to the present invention.
  • Figures 6 and 7 are views similar to Figures 4 and 5, a third embodiment of the attachment means according to the present invention.
  • Figures 8 and 9 are views similar to views 4 and 5 of a fourth embodiment of the attachment means of the frame according to the present invention.

Un distributeur de fluide sous pression, et plus particulièrement un manipulateur hydraulique, est représenté à la figure 1. Le fluide est délivré à un dispositif aval non représenté sous une pression qui est adaptée à l'utilisation qui en est faite.A fluid dispenser under pressure, and more particularly a hydraulic manipulator, is shown in Figure 1. The fluid is delivered to a downstream device not shown under a pressure that is adapted to the use that is made of it.

Le distributeur de fluide sous pression comprend au moins un réducteur de pression 2. De préférence et comme cela est couramment rencontré dans les manipulateurs hydrauliques pour engins de travaux publics, il est équipé de quatre réducteurs de pression identiques les uns aux autres. Seuls deux de ces réducteurs sont représentés à la figure 1.The pressurized fluid distributor comprises at least one pressure reducer 2. Preferably and as is commonly encountered in hydraulic manipulators for public works machinery, it is equipped with four pressure reducers identical to each other. Only two of these reducers are shown in Figure 1.

Chaque réducteur de pression 2 comprend un plongeur 3 pouvant se déplacer dans une cavité 4 ménagée dans le corps 5 du distributeur.Each pressure reducer 2 comprises a plunger 3 that can move in a cavity 4 formed in the body 5 of the dispenser.

Comme cela est bien connu dans le domaine, le tarage du réducteur de pression est commandé par un opérateur par l'action sur un organe de commande 6 (partiellement représenté à la figure 1). Cet organe de commande est monté sur une articulation 7 qui est portée par le corps 5 du distributeur 1, au niveau de l'une des faces 8 du corps 5. Cette articulation est par exemple du type à cardan, une articulation sphérique, ou bien encore une liaison à pivot.As is well known in the field, the setting of the pressure reducer is controlled by an operator by the action on a control member 6 (partially shown in Figure 1). This control member is mounted on a hinge 7 which is carried by the body 5 of the distributor 1, at one of the faces 8 of the body 5. This joint is for example of the cardan type, a spherical joint, or still a pivot link.

La cavité 4 possède une extrémité 9 qui débouche sur la face 8 du corps 5. L'organe de commande 6 possède, par ailleurs, un doigt 10 qui s'étend à partir de l'articulation 7 pour faire saillie sensiblement à l'aplomb du plongeur 3 monté dans la cavité 4.The cavity 4 has an end 9 which opens on the face 8 of the body 5. The control member 6 has, moreover, a finger 10 which extends from the joint 7 to project substantially to the plumb of the plunger 3 mounted in the cavity 4.

Le réducteur de pression comprend, de manière connue en soi, un poussoir 11 et un ressort de régulation 12 de sorte que sous l'action de l'organe de commande 6, le poussoir 11 possède un mouvement de translation en va-et-vient à l'intérieur de la cavité 4, au niveau de l'extrémité débouchante 9 de cette cavité.The pressure reducer comprises, in a manner known per se, a pusher 11 and a regulation spring 12 so that under the action of the control member 6, the pusher 11 has a translational movement back and forth inside the cavity 4, at the open end 9 of this cavity.

Ainsi, l'organe de commande 6 permet de modifier la position du poussoir 11 pour commander le tarage du réducteur de pression et donc, la valeur de la pression délivrée par le distributeur vers le dispositif aval (non représenté).Thus, the control member 6 allows to change the position of the pusher 11 to control the setting of the pressure reducer and therefore the value of the pressure delivered by the distributor to the downstream device (not shown).

Le fonctionnement d'un tel distributeur de fluide est bien connu de l'homme du métier, et est par exemple décrit dans le document FR-2 376 978 ou FR-2 507 732 ou bien encore dans le FR-2 781 846.The operation of such a fluid dispenser is well known to those skilled in the art, and is described, for example, in document FR-2 376 978 or FR-2 507 732 or again in FR-2 781 846.

Par ailleurs, et comme cela est également bien connu de l'homme du métier, le distributeur de fluide sous pression possède des moyens formant solénoïde 15 coopérant avec une armature 16 pour bloquer en position le poussoir 3 dans une position prédéfinie.Furthermore, and as is also well known to those skilled in the art, the pressurized fluid dispenser has solenoid means 15 cooperating with a frame 16 to lock the pusher 3 in position in a predefined position.

Les moyens formant solénoïde 15 consistent par exemple en une bobine. Cette bobine est montée dans le corps 5 sensiblement coaxialement au poussoir 11. Une extrémité de cette bobine est débouchante au niveau de la face 8 du corps 5 pour définir une surface d'appui 17 sensiblement coplanaire à cette face. Cette surface d'appui 17 peut encore être légèrement en retrait par rapport à la face 8, tout en étant sensiblement parallèle à cette face. La bobine 15 délivre ainsi un champ magnétique selon une direction sensiblement parallèle à la direction de translation du poussoir 11.The solenoid means 15 consist for example of a coil. This coil is mounted in the body 5 substantially coaxially with the pusher 11. One end of this coil is open at the face 8 of the body 5 to define a bearing surface 17 substantially coplanar with this face. This bearing surface 17 can still be slightly recessed with respect to the face 8, while being substantially parallel to this face. The coil 15 thus delivers a magnetic field in a direction substantially parallel to the direction of translation of the pusher 11.

L'armature 16 est apte à être entraînée en translation simultanément au poussoir 11 et est réalisée en un matériau sensible au champ magnétique, tel qu'un matériau ferreux. Cette armature possède une surface de contact 18 qui est située en regard de la surface d'appui 17 de manière à venir en butée contre cette surface d'appui 17 dans une position prédéfinie du poussoir 11. Dans cette position, le poussoir est ainsi bloqué avec une force d'attraction prédéterminée entre l'armature et la bobine.The armature 16 is adapted to be driven in translation simultaneously with the pusher 11 and is made of a material sensitive to the magnetic field, such as a ferrous material. This armature has a contact surface 18 which is located facing the bearing surface 17 so as to abut against this bearing surface 17 in a predefined position of the pusher 11. In this position, the pusher is thus blocked. with a predetermined force of attraction between the armature and the coil.

Selon une caractéristique essentielle de la présente invention, le distributeur de fluide 1 possède en outre des moyens d'accrochage 20 de l'armature 16 sur le doigt 10 de l'organe de commande 6. Ces moyens d'accrochage permettent de solidariser en mouvement l'armature 16 avec le doigt 10, de sorte que l'armature 16 est montée en quelque sorte en suspension sous le doigt 10. Cette armature possède ainsi cinq degrés de liberté afin que sa surface de contact 18 soit en permanence parallèle à la surface d'appui 17 de la bobine et ce, malgré un possible léger désaxage entre l'axe du poussoir 11 et la direction de la force exercée par le doigt 10 sur les moyens d'accrochage 20 lors du déplacement du poussoir.According to an essential characteristic of the present invention, the fluid dispenser 1 furthermore has means 20 for fastening the armature 16 to the finger 10 of the control member 6. These attachment means make it possible to join in motion the armature 16 with the finger 10, so that the armature 16 is mounted somehow in suspension under the finger 10. This armature thus has five degrees of freedom so that its contact surface 18 is permanently parallel to the surface support 17 of the coil and this, despite a possible slight offset between the axis of the pusher 11 and the direction of the force exerted by the finger 10 on the attachment means 20 during movement of the pusher.

A cet effet, les moyens d'accrochage 20 sont situés à l'opposé de la face 8 du corps 5 par rapport à l'armature 16. Ces moyens d'accrochage 20 (figure 2) délimitent une fenêtre 21 dans laquelle fait saillie le poussoir 11 après avoir traversé l'armature 16. Ce poussoir est monté traversant avec jeu dans cette armature.For this purpose, the attachment means 20 are located opposite the face 8 of the body 5 relative to the frame 16. These attachment means 20 (Figure 2) delimit a window 21 in which protrudes the push 11 after have passed through the frame 16. This pusher is mounted through with play in this frame.

Le doigt 10 est placé dans la fenêtre sensiblement transversalement à celle-ci pour être interposé entre les moyens d'accrochage 20 et le poussoir 11. Le poussoir 11 est immobilisé en translation par rapport au doigt 10 au moyen par exemple d'un circlips 22 monté en appui sur l'armature 16, à l'intérieur de la fenêtre 21.The finger 10 is placed in the window substantially transversely thereto to be interposed between the attachment means 20 and the pusher 11. The pusher 11 is immobilized in translation relative to the finger 10 by means for example of a circlip 22 mounted bearing on the frame 16, inside the window 21.

Comme cela est plus particulièrement représenté à la figure 2, les moyens d'accrochage 20 prennent la forme d'un étrier 25 situé au-dessus de l'armature 16 pour définir, avec cette armature, la fenêtre 21. Le montant supérieur 26 et les parois latérales 27 et 28 sont ainsi définies par l'étrier 25, tandis que le montant inférieur 29 de cette fenêtre est défini par l'armature 16.As is more particularly shown in Figure 2, the attachment means 20 take the form of a stirrup 25 located above the frame 16 to define, with this frame, the window 21. The upper amount 26 and the side walls 27 and 28 are thus defined by the stirrup 25, while the lower amount 29 of this window is defined by the armature 16.

Afin de permettre un mouvement de balancement de l'armature 16 et de l'étrier 25 autour du doigt 10, l'étrier 25 est en contact ponctuel avec le doigt 10 au niveau du montant supérieur 26 de la fenêtre 21. A cet effet, le doigt 10 possède un embout sphérique 30. Plus particulièrement, cet embout est par exemple hémisphérique, de sorte que le montant supérieur 26 est en appui quasiment ponctuel sur la partie de forme sphérique de l'embout 30. De même, le poussoir 11 est en appui contre l'embout 30 selon un contact ponctuel, à l'opposé du contact entre l'embout 30 et le montant supérieur 26.In order to allow a swinging movement of the armature 16 and the stirrup 25 around the finger 10, the stirrup 25 is in point contact with the finger 10 at the upper post 26 of the window 21. For this purpose, the finger 10 has a spherical tip 30. More particularly, this tip is for example hemispherical, so that the upper post 26 bears almost punctally on the spherical portion of the tip 30. Similarly, the pusher 11 is in abutment against the tip 30 according to a point contact, opposite the contact between the tip 30 and the upper post 26.

L'armature 16 prend par exemple la forme d'une rondelle.The armature 16 takes for example the form of a washer.

Comme cela est plus particulièrement représenté à la figure 3, l'étrier 25 et la rondelle 16 sont venus de matière ensemble.As is more particularly shown in Figure 3, the stirrup 25 and the washer 16 are integral material.

Dans encore une autre variante, l'étrier 25 est rapporté par vissage sur la rondelle 16, comme cela est représenté aux figures 4 et 5. Les parois latérales 27 et 28 prennent alors la forme d'entretoises 35 et 36 sur lesquelles est placé un pont 39 coïncidant avec le montant supérieur de la fenêtre. Des vis 37 et 38 traversent les entretoises pour solidariser le pont et les entretoises sur l'armature 16, sensiblement perpendiculairement au plan défini par cette armature.In yet another variant, the stirrup 25 is screwed onto the washer 16, as shown in FIGS. 4 and 5. The side walls 27 and 28 then take the form of spacers 35 and 36 on which is placed a bridge 39 coinciding with the upper amount of the window. Screws 37 and 38 pass through the spacers to secure the bridge and the spacers on the frame 16, substantially perpendicular to the plane defined by this frame.

Dans la variante représentée aux figures 6 et 7, l'étrier 25 est encore rapporté par vissage sur la rondelle 16, comme dans la variante représentée aux figures 4 et 5. L'étrier 25 est réalisé d'une seule pièce en forme d'agrafe, par exemple en matière métallique. Il possède maintenant deux extrémités 40 et 41 qui sont repliées vers l'intérieur de la fenêtre, parallèlement à l'armature 16. Ces deux extrémités sont fixées par vissage sur l'armature.In the variant represented in FIGS. 6 and 7, the stirrup 25 is again screwed onto the washer 16, as in the variant shown in FIGS. 4 and 5. The stirrup 25 is made in one piece in the form of staple, for example of metal material. It now has two ends 40 and 41 which are folded towards the inside of the window, parallel to the armature 16. These two ends are fixed by screwing on the armature.

Dans encore une autre variante représentée aux figures 8 et 9, l'étrier 25 est rapporté par clipsage sur la rondelle 16. A cet effet, cette rondelle possède des ergots 45 et 46 qui font saillie sur la face de la rondelle 16 opposée à sa surface de contact 18 pour pénétrer dans les parois latérales 27 et 28. L'étrier est alors par exemple réalisé en matière plastique.In yet another variant shown in Figures 8 and 9, the stirrup 25 is attached by clipping onto the washer 16. For this purpose, this washer has lugs 45 and 46 which project on the face of the washer 16 opposite its contact surface 18 to penetrate the side walls 27 and 28. The stirrup is then for example made of plastic.

Bien entendu, l'invention n'est pas limitée aux exemples décrits ci-dessus et diverses modifications peuvent y être apportées sans sortir du cadre des revendications.Of course, the invention is not limited to the examples described above and various modifications can be made without departing from the scope of the claims.

Claims (10)

  1. Fluid distributor, especially a hydraulic handler, of the type comprising:
    - a body (5) having at least one cavity (4) of which one end (9) emerges onto at least one face (8) of said body (5);
    - at least one pressure reducer (2) which is mounted in the body (5) and comprises a push-rod (11) mounted in a movable manner at the emerging end (9), a plunger (3) mounted in the cavity (4), and a regulating spring interposed between the push-rod and the plunger, the said plunger being mounted in a manner oscillating in translation in order to perform the function of a pressure reducer, the equilibrium of which pressure reducer depends upon the compression of the regulating spring imposed by the driving-in of the push-rod and upon the regulating pressure at the outlet which is to be delivered to a downstream device;
    - a control component (6) suitable for modifying the driving-in of the push-rod (11) in order to control the value of the pressure delivered, said control component (6) being mounted in a pivoting manner opposite the said face (8) of the body (5) and comprising at least one finger (10);
    - means (15) forming a solenoid which are capable of delivering a magnetic field in a direction substantially parallel to the direction of translation of the plunger, are mounted in the body (5) while being substantially coaxial with the push-rod (11), and define a support surface (17) which is substantially coplanar with the said face (8) of the body (5);
    - an armature (16) which is capable of being driven in translation at the same time as the push-rod (11), is made of a material sensitive to the magnetic field, and comprises a contact surface (18) situated opposite the support surface (17) belonging to the means (15) forming a solenoid, in such a way as to abut against said support surface in order to lock the push-rod (11) in position with a predetermined force of attraction;
    the said distributor also comprises means (20) for coupling the armature (16) onto the finger (10) which delimit a window (21) into which said finger projects substantially transversely;
    characterised in that the push-rod (11) is mounted in the armature (16) in a manner passing through with clearance in order to project into the window (21), and in that the finger (10) is interposed between the coupling means (20) and the push-rod (11).
  2. Fluid distributor according to Claim 1, characterised in that the coupling means (20) and the armature (16) together delimit the window (21).
  3. Fluid distributor according to Claim 2, characterised in that the coupling means comprise a stirrup (25) which defines the upper strut (26) and the sidewalls (27, 28) of the window (21), the lower strut (29) of said window (21) being defined by the armature (16).
  4. Fluid distributor according to Claim 3, characterised in that the finger (10) is in punctual contact with the upper strut (26) of the window (21).
  5. Fluid distributor according to Claim 4, characterised in that the finger (10) comprises a spherical tip (30) on which the upper strut (29) of the window (21) rests.
  6. Fluid distributor according to any of Claims 1 to 5, characterised in that the armature (16) comprises a disc made of ferrous material.
  7. Fluid distributor according to Claim 6, characterised in that the stirrup (25) is over-moulded onto the disc (16).
  8. Fluid distributor according to any of Claims 3 to 6, characterised in that the stirrup (25) and the armature (16) are in one piece with each other.
  9. Fluid distributor according to Claim 6, characterised in that the upper strut (26) and the sidewalls (27, 28) are added onto the disc (16) by screwing.
  10. Fluid distributor according to Claim 9, characterised in that the sidewalls (27, 28) are distance-pieces (35, 36) through which screws (37, 38) pass.
EP03780237A 2002-10-31 2003-10-28 Pressurized fluid distributor Expired - Lifetime EP1556618B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0213689A FR2846719B1 (en) 2002-10-31 2002-10-31 PRESSURIZED FLUID DISPENSER WITH SUSPENDED FRAME
FR0213689 2002-10-31
PCT/FR2003/003209 WO2004042236A1 (en) 2002-10-31 2003-10-28 Pressurized fluid distributor

Publications (2)

Publication Number Publication Date
EP1556618A1 EP1556618A1 (en) 2005-07-27
EP1556618B1 true EP1556618B1 (en) 2006-11-22

Family

ID=32104368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03780237A Expired - Lifetime EP1556618B1 (en) 2002-10-31 2003-10-28 Pressurized fluid distributor

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US (1) US7104284B2 (en)
EP (1) EP1556618B1 (en)
JP (1) JP4686190B2 (en)
AT (1) ATE346243T1 (en)
AU (1) AU2003288333A1 (en)
DE (1) DE60309916T2 (en)
FR (1) FR2846719B1 (en)
WO (1) WO2004042236A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7753078B2 (en) * 2007-04-19 2010-07-13 Husco International Inc. Hybrid hydraulic joystick with an integral pressure sensor and an outlet port
US7753077B2 (en) * 2007-04-19 2010-07-13 Husco International Inc. Hybrid hydraulic joystick for electrically operating valves
FR2966279A1 (en) * 2011-01-12 2012-04-20 Bosch Rexroth Dsi Sas Power or control device for e.g. agricultural vehicle, has adjusting unit that is provided for adjusting intensity of current applied at terminals of reel with respect to electrical current applied at terminals of position maintaining units
JP2017009082A (en) * 2015-06-25 2017-01-12 ヤンマー株式会社 Hydraulic operation device
FR3042574B1 (en) 2015-10-19 2018-05-04 Robert Bosch Gmbh HYDRAULIC FLUID DISPENSER UNDER CONTROLLED PRESSURE

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Publication number Priority date Publication date Assignee Title
US3528638A (en) * 1968-05-23 1970-09-15 Caterpillar Tractor Co Detent for valves with automatic release means
JPS5213083A (en) * 1975-07-21 1977-02-01 Teijin Seiki Co Ltd Fuel safe-servo control valve
FR2376978A1 (en) 1977-01-06 1978-08-04 Rexroth Sigma IMPROVEMENTS TO FLUID DISTRIBUTOR DEVICES, ESPECIALLY FOR HYDRAULIC REMOTE CONTROL
FR2507732B1 (en) 1981-06-12 1985-08-02 Rexroth Sigma IMPROVEMENTS TO DIVERS FOR FLUID PRESSURE REDUCERS, REDUCERS AND DISTRIBUTORS EQUIPPED WITH SUCH DIVERS
US5251534A (en) * 1992-04-29 1993-10-12 Kayaba Industry Co. Ltd. Input apparatus
WO1994009278A1 (en) * 1992-10-09 1994-04-28 Kabushiki Kaisha Komatsu Seisakusho Hydraulic pilot valve
GB9506500D0 (en) 1995-03-30 1995-05-17 Brown David Hydraulics Ltd An improved joystick arrangement
US5638866A (en) * 1996-03-01 1997-06-17 Dana Corporation Detent arrangement for holding hydraulic valve members stroked
FR2781846B1 (en) 1998-07-28 2002-03-01 Mannesmann Rexroth Sa FLUID DISTRIBUTOR DEVICE, PARTICULARLY FOR HYDRAULIC REMOTE CONTROL
JP2000230506A (en) * 1999-02-10 2000-08-22 Komatsu Ltd Actuator drive device by operation lever and operation lever device

Also Published As

Publication number Publication date
JP4686190B2 (en) 2011-05-18
FR2846719A1 (en) 2004-05-07
EP1556618A1 (en) 2005-07-27
FR2846719B1 (en) 2006-02-03
AU2003288333A1 (en) 2004-06-07
JP2006504916A (en) 2006-02-09
US7104284B2 (en) 2006-09-12
DE60309916D1 (en) 2007-01-04
ATE346243T1 (en) 2006-12-15
US20050247355A1 (en) 2005-11-10
WO2004042236A1 (en) 2004-05-21
DE60309916T2 (en) 2007-03-15

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