EP1010898B1 - Distributeur pneumatique piloté - Google Patents

Distributeur pneumatique piloté Download PDF

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Publication number
EP1010898B1
EP1010898B1 EP99123631A EP99123631A EP1010898B1 EP 1010898 B1 EP1010898 B1 EP 1010898B1 EP 99123631 A EP99123631 A EP 99123631A EP 99123631 A EP99123631 A EP 99123631A EP 1010898 B1 EP1010898 B1 EP 1010898B1
Authority
EP
European Patent Office
Prior art keywords
control
directional valve
pressure
sealing
connections
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
EP99123631A
Other languages
German (de)
English (en)
Other versions
EP1010898A2 (fr
EP1010898A3 (fr
Inventor
Joerg Widera
Rainer Jungeilges
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
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1010898A2 publication Critical patent/EP1010898A2/fr
Publication of EP1010898A3 publication Critical patent/EP1010898A3/fr
Application granted granted Critical
Publication of EP1010898B1 publication Critical patent/EP1010898B1/fr
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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
    • 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
    • F15B2013/0428—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 switchable internal or external pilot pressure source

Definitions

  • the invention is based on a piloted pneumatic directional valve according to the genus of Claim 1.
  • Such directional valves have long been known; in this regard, the example of the Print "Bosch Pneumatics information, basics and Functional description ", edition 9/77, page 46. It shows a directional valve with five connections, that of an electromagnetic pilot in two switch positions is switchable. Both Switch positions differ in the existing ones Pressure fluid connections between the connections from each other. Switching between the two Switch positions are made by the pilot control device, which is an actuator of the directional control valve with pressure medium debited or relieved.
  • both the Control valve self-controlled pressure medium (self-control) as well as one from an external pressure generator Use the pressure medium provided (external control).
  • Pilot control devices both control variants enable, have separate control pressure connections on that according to the desired pressure medium supply are to be contacted.
  • One of these connections will be there not required and must be closed to prevent fluid leakage.
  • Around Seals have been used to keep the effort as low as possible for cost reasons developed that depending on the selected pressure medium supply in 180 ° to each other twisted installation positions can be installed. However, this can lead to assembly errors come that only with the help of a complex position detection during assembly are avoidable.
  • Directional valves with incorrectly installed seals have no function.
  • EP 0 846 873 A2 or EP 0 846 872 A1 describes a generic pilot-controlled one pneumatic directional control valve, in the housing one in several switching positions bringable control means in the manner of a valve spool pressure medium connection between the outer connections of the directional valve.
  • the valve spool is by means of a Pilot control device correspondingly axially adjustable, which can be either with a third party or with System pressure can be controlled.
  • the directional valve continues to work with a shuttle valve together, which pressure medium connections between two different Pilot channels on the one hand and a control channel leading to the pilot device on the other hand.
  • a pilot operated pneumatic directional valve with the characteristic Features of claim 1 the advantage that such assembly errors will not in the future can occur more.
  • shuttle valves are proposed according to the invention provided that the external control pressure is always higher than the system pressure, regardless of their installation position, they automatically lead the external control pressure Close the pilot channel if it is not connected and at the same time a pressure medium connection between the pilot channel and the system pressure the pilot control device of the directional control valve reliably even after a long period of operation release.
  • shuttle valves are realizable and cost-neutral do not require additional construction volume; an elaborate Position detection during assembly assembly can be omitted.
  • FIG. 1 is the invention Directional control valve simplified using circuit symbols shown
  • Figure 2 shows a detailed view of the Crossover valve according to the invention in cross section.
  • FIG 1 is a pilot operated directional control valve as an example 10 shown in 5/2 construction as a circuit symbol. Therefore the directional control valve 10 has five connections, with 12 the inlet connection, with 14 and 16 the return connections and with 18 and 20 the working connections of the directional valve 10 are designated. The latter are by switching the Directional control valve 10 alternately with the inlet connection 12 or one of the return connections 14, 16 connectable, based on the drawn flow arrows is clarified.
  • a Switching of the directional valve 10 takes place with the help of a Pilot control device 22, for example on the front the housing 24 of the directional valve 10 is flanged.
  • the Pilot control device 22 comprises an externally controllable, electromagnetic actuator 26, the one Control pressure port 28 and thus an undetectable Releases pressure medium connection to directional valve 10 or closes.
  • the control pressure can be between the system pressure and a externally generated pressure can be selected, the Pressure level of the external control pressure is always higher than that of the system pressure.
  • a directional control valve 10 with a shuttle valve 30 equipped, leading into the external control pressure or System pressure leading pilot channels 32, 34 open.
  • One of these is controlled by a closing member 36 Pilot channels 32, 34 via a control channel 38 with the Pilot control device 22 connected.
  • This closing member 36 closes the one that is not required Pilot channel 32, 34 and opens one at the same time Pressure medium connection from the one leading the control pressure Pilot channel 32, 34 to control channel 38.
  • the that Directional control valve 10, the pilot control device 22 and that Shuttle valve 30 enclosing and dash-dotted drawn frame indicates a housing 40, in which the described modules are installed.
  • FIG. 2 shows a detail section through the Housing 40.
  • the cut takes place in one plane, in which one is assigned to the external connection Pilot channel 32, which branches off from the inlet connection 12 Pilot channel 34 and that to pilot device 22 leading control channel 38 into a common gap 42 open out.
  • the mouth of the Pilot channel 32 that of the pilot channel 34 in alignment opposite, while the control channel 38 laterally parallel offset to that on the pilot channel 34 Side of the gap 42 is arranged.
  • this Sealing element 44 To seal the gap 42 to the outside is in this Sealing element 44 from a self-contained Molded seal 46 and one in the interior of this Form seal 46 inserted tongue 48 inserted.
  • the tongue 48 is smaller in cross section than that Molded seal 46 executed and can within the gap 42nd perform a switching movement.
  • One end of the tongue 48 is also in one piece and articulated to the molded seal 46 tethered while the opposite second end in Embodiment is free, i.e. no connection with the Form seal 46 has.
  • This free end of the tongue 48 extends into the area of the mouths of the Pilot channels 32, 34 and is on its Mouth of the pilot channels 32, 34 facing upper and Underside with a circumferential sealing bead 50 each Mistake.
  • the mouths of the pilot channels 32, 34 have a smaller diameter than the sealing beads 50, so that the latter one of the pilot channels 32, 34 at tongue 48 can reliably close.
  • the Directional control valve 10 according to the invention comes for both types of Control pressure supply with a uniform Sealing element 44, which is also cost-neutral can be produced and requires no additional construction volume.
  • the sealing element 44 can be provided with a spring element which generates a pretension for the tongue 48 or with a component which determines a preferred position of the tongue 48. This component can be embedded in the sealing element 44.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valve Housings (AREA)
  • Fluid-Driven Valves (AREA)
  • Multiple-Way Valves (AREA)

Claims (8)

  1. Distributeur à commande pilote (10) avec un boítier (40) présentant des raccords (12 - 20), dans lequel un moyen de commande apte à être amené dans au moins deux positions de commande contrôle des connexions pour le milieu de pression entre ces raccords (12 - 20), et avec une installation à commande pilote (22) alimentant le moyen de commande qui peut être commandée au choix avec une pression indépendante ou avec une pression du système, dans quel cas le distributeur (10) agit conjointement avec une soupape à deux voies (30) qui commute des connexions pour le milieu de pression entre au moins deux canaux à commande pilote (32, 34) et un canal de commande (38) conduisant à l'installation à commande pilote (22) à l'aide d'une installation de fermeture (36), et dans quel cas l'installation de fermeture (36) relie de façon automatique et indépendante de la manière de l'approvisionnement en milieu de pression le canal à commande pilote (32, 34) au canal de commande (38) et ferme en même temps le canal à commande pilote (32, 34) non nécessité pour la conduite de la pression de commande, caractérisé en ce que l'installation de fermeture (36) est configurée sous la forme d'un joint profilé (46), dont le contour extérieur est fermé, avec un élément de fermeture disposé dans l'intérieur de celui-ci qui est formé d'une langue (48) qui est rattachée par formage d'une manière flexible à un segment du joint profilé (46) et qui se trouve sous l'action de la pression de commande.
  2. Distributeur à commande pilote suivant la revendication 1, caractérisé en ce que la soupape à deux voies (30) est montée dans le boítier (40) du distributeur ( 10).
  3. Distributeur à commande pilote suivant l'une des revendications 1 ou 2, caractérisé en ce que la soupape à deux voies (30) constitue une partie intégrée d'un élément d'étanchéité (44) entre l'installation à commande pilote (22) et le distributeur (10).
  4. Distributeur à commande pilote suivant l'une des revendications 1 à 3, caractérisé en ce que l'élément de fermeture (48) est pourvu dans la région de son rattachement au joint profilé (46) d'au moins une ouverture de transfert (52).
  5. Distributeur à commande pilote suivant l'une des revendications 1 à 4, caractérisé en ce que le joint profilé (46) de l'élément d'étanchéité (44) étanchéifie vers l'extérieur les canaux à commande pilote (32, 34) ainsi que le canal de commande (38) conduisant vers l'installation pilote (22).
  6. Distributeur à commande pilote suivant l'une des revendications 1 à 5, caractérisé en ce que les canaux à commande pilote (32, 34) se trouvent en alignement l'un en face de l'autre et que le canal de commande (38) s'étend en étant déplacé latéralement par rapport à ces canaux à commande pilote (32, 34).
  7. Distributeur à commande pilote suivant l'une des revendications 1 à 6, caractérisé en ce que l'élément de fermeture (48) s'étend jusque dans l'intérieur de la région de l'embouchure des deux canaux à commande pilote (32, 34) et est pourvu d'au moins un contour d'étanchéité (50) afin de rendre étanche les sections transversales de l'embouchure.
  8. Distributeur à commande pilote suivant l'une des revendications 1 à 7, caractérisé en ce que la langue (48) est rattachée par formage de manière centrée à la section transversale du joint profilé (46).
EP99123631A 1998-12-18 1999-11-27 Distributeur pneumatique piloté Expired - Lifetime EP1010898B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19858566 1998-12-18
DE19858566A DE19858566A1 (de) 1998-12-18 1998-12-18 Vorgesteuertes pneumatisches Wegeventil

Publications (3)

Publication Number Publication Date
EP1010898A2 EP1010898A2 (fr) 2000-06-21
EP1010898A3 EP1010898A3 (fr) 2000-07-12
EP1010898B1 true EP1010898B1 (fr) 2003-11-19

Family

ID=7891621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123631A Expired - Lifetime EP1010898B1 (fr) 1998-12-18 1999-11-27 Distributeur pneumatique piloté

Country Status (3)

Country Link
EP (1) EP1010898B1 (fr)
JP (1) JP2000179740A (fr)
DE (2) DE19858566A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE369C (de) * 1877-07-03 KOCH, Königl. Eisenbahn - Bau - und Betriebs-Inspektor, in Hamm Eisenbahngeleisbau - System, kombinirt aus Lang- und Querschwellen
DE1164176B (de) * 1961-09-14 1964-02-27 Berg Airlectro Products Co Selbsttaetiges Mehrwegeventil
DE2811365C2 (de) * 1978-03-16 1984-12-20 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Pneumatisches Steuerventil
JPH10169818A (ja) * 1996-12-05 1998-06-26 Smc Corp 切換弁用マニホールド
JPH10169805A (ja) * 1996-12-05 1998-06-26 Smc Corp パイロット式切換弁

Also Published As

Publication number Publication date
EP1010898A2 (fr) 2000-06-21
JP2000179740A (ja) 2000-06-27
EP1010898A3 (fr) 2000-07-12
DE19858566A1 (de) 2000-06-29
DE59907796D1 (de) 2003-12-24

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