EP1556618B1 - Distributeur de fluide sous pression - Google Patents

Distributeur de fluide sous pression 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
Authority
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
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1556618A1 (fr
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
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
Publication of EP1556618A1 publication Critical patent/EP1556618A1/fr
Application granted granted Critical
Publication of EP1556618B1 publication Critical patent/EP1556618B1/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
    • 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.
EP03780237A 2002-10-31 2003-10-28 Distributeur de fluide sous pression Expired - Lifetime EP1556618B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0213689 2002-10-31
FR0213689A FR2846719B1 (fr) 2002-10-31 2002-10-31 Distributeur de fluide sous pression a armature suspendue
PCT/FR2003/003209 WO2004042236A1 (fr) 2002-10-31 2003-10-28 Distributeur de fluide sous pression

Publications (2)

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

Family

ID=32104368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03780237A Expired - Lifetime EP1556618B1 (fr) 2002-10-31 2003-10-28 Distributeur de fluide sous pression

Country Status (8)

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

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 (fr) * 2011-01-12 2012-04-20 Bosch Rexroth Dsi Sas Ventouse electromagnetique
JP2017009082A (ja) * 2015-06-25 2017-01-12 ヤンマー株式会社 油圧操作装置
FR3042574B1 (fr) 2015-10-19 2018-05-04 Robert Bosch Gmbh Distributeur de liquide hydraulique sous une pression commandee

Family Cites Families (10)

* Cited by examiner, † Cited by third party
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 (fr) 1977-01-06 1978-08-04 Rexroth Sigma Perfectionnements aux dispositifs distributeurs de fluide, notamment pour telecommande hydraulique
FR2507732B1 (fr) 1981-06-12 1985-08-02 Rexroth Sigma Perfectionnements apportes aux plongeurs pour reducteurs de pression de fluide, reducteurs et distributeurs equipes de tels plongeurs
US5251534A (en) * 1992-04-29 1993-10-12 Kayaba Industry Co. Ltd. Input apparatus
US5558127A (en) * 1992-10-09 1996-09-24 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 (fr) 1998-07-28 2002-03-01 Mannesmann Rexroth Sa Dispositif distributeur de fluide notamment pour telecommande hydraulique
JP2000230506A (ja) * 1999-02-10 2000-08-22 Komatsu Ltd 操作レバーによるアクチュエータ駆動装置および操作レバー装置

Also Published As

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

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