EP0907832A1 - Dispositif de commande d'un verin differentiel travaillant sur un seul cote - Google Patents

Dispositif de commande d'un verin differentiel travaillant sur un seul cote

Info

Publication number
EP0907832A1
EP0907832A1 EP97932719A EP97932719A EP0907832A1 EP 0907832 A1 EP0907832 A1 EP 0907832A1 EP 97932719 A EP97932719 A EP 97932719A EP 97932719 A EP97932719 A EP 97932719A EP 0907832 A1 EP0907832 A1 EP 0907832A1
Authority
EP
European Patent Office
Prior art keywords
piston
connection
valve
working cylinder
way valve
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.)
Withdrawn
Application number
EP97932719A
Other languages
German (de)
English (en)
Inventor
Georg Bunge
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.)
Parker Hannifin GmbH and Co KG
Original Assignee
Parker Hannifin GmbH and Co KG
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 Parker Hannifin GmbH and Co KG filed Critical Parker Hannifin GmbH and Co KG
Publication of EP0907832A1 publication Critical patent/EP0907832A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator

Definitions

  • the invention relates to a device for controlling a piston with a single-sided piston rod having a double-acting working cylinder by means of a multi-way valve, which supplies the working medium to one of the different-sized displacements of the working cylinder and allows it to flow out of the other displacement during the piston stroke, the multi-way valve designed in the manner of a piston spool one Pump connection P, a connection AI for a supply and discharge line between the large displacement of the working cylinder and the multi-way valve, a connection Bl for a supply and discharge line between the small displacement of the working cylinder and the multi-way valve, a connection A2 for one to the between Connection AI and the large displacement of the working cylinder existing supply and discharge line connected connecting line and two tank connections Tl, T2, and wherein the valve piston of the multi-way valve at least five on coils has arranged control edges and the connections P, AI, A2, Bl, Tl, T2 are arranged such that when extending the piston to take advantage of the differential action of the working cylinder with fast piston
  • a device with the aforementioned features is described in DE 30 00 260 C2;
  • the circuit arrangement known therefrom, with an assignment of six connections of the multi-way valve used one behind the other, is intended on the one hand to allow the piston of the working cylinder to be moved with differential action, that is to say with rapid piston movement, and on the other hand to make the multi-way valve as small as possible in construction with a uniform loading of those provided for the multi-way valve Ensure five control edges with the same amount of working medium in both directions of movement of the piston of the working cylinder.
  • the additional connection opening connected via the connecting line to the large cubic capacity of the working cylinder has an associated control edge which only controls the flow of working medium flowing through this connecting line, with the control edge controlling the outflow from small displacement acting line connected, at the same time via another control edge and thus regardless of the flow path between the displacements of the working cylinder, the pump connection is connected to the feed line to the large displacement of the working cylinder.
  • the connection can be connected to the tank via a further connection provided in the multi-way valve.
  • a directional control valve with two switching positions is additionally switched on in the connecting line.
  • the directional control valve switches to a position in which the connection between the small cubic capacity and the large cubic capacity given by the connection of the connections Bl, AI is interrupted and the small cubic capacity of the working cylinder is connected to the tank is.
  • the pressure acting on the large surface of the piston of the working cylinder is counteracted by no pressure in the small displacement of the working cylinder, so that the holding force is doubled compared to the state when the piston rod is extended.
  • This known embodiment has the disadvantage that the additional directional valve means an increased outlay in the corresponding configuration of the control device, in particular also because this directional valve must be designed for the same nominal size as the multi-way valve serving for the main control of the working cylinder, because in the mentioned functional case of connecting the small cubic capacity to the tank, the same passage of working medium has to be led through the directional valve as this applies to the multi-way valve.
  • the invention is therefore based on the object of developing a control device for a differential cylinder with the features mentioned in such a way that the additional directional valve can be omitted while maintaining the function of a force build-up when the piston rod is extended.
  • the invention is directed to the fact that an additional connection B2 is provided for an additional connecting line connected to the supply and discharge line existing between the connection Bl and the small cubic capacity of the working cylinder and the six control edges formed on the annular collars of the valve piston and the seven connections P, AI , A2, Bl, B2, Tl, T2 of the multi-way valve are assigned such that in the switching position of the valve piston determined to extend the piston rod with differential action, the additional connection B2 is connected to A2 when the connection Bl is blocked, and that the ring collar blocking the connection Bl with a movement of the piston corresponding to the differential movement of the piston Valve piston effective overlap and the associated control edge only after passing the valve piston position corresponding to the end of the differential movement releases the connection between the connections B1, T2, with in the connecting line connected to the connection B2 a connecting line opening towards the connection B2 and towards Non-return valve blocking the working cylinder is switched on.
  • the additional directional valve still required in the generic state of the art can be omitted, since its function both with regard to the formation of an additional tank connection is also integrated in the multi-way valve itself with respect to the time when the additional tank connection becomes effective.
  • the multi-way valve according to the invention is characterized by six control edges formed on the valve piston and an additional seventh control edge in the form of the check valve. Due to the additional seventh port opening, the size of the multi-way valve is only slightly increased, and the check valve, which is available as a simple, commercially available component, does not represent a significant additional expense.
  • the multi-way valve is designed so that the multi-way valve seven each has openings P, AI, A2, Bl, B2, Tl, T2 communicating with an annular channel, with openings Tl to the tank, AI to the large displacement, P to the pump, Bl to the small displacement, starting at the non-blocked valve end lead to the tank, A2 to the connecting line and B2 to the connecting line, the ring collars being assigned to every second opening and the associated ring channel in the central position of the valve piston.
  • the differential cylinder consists of a working cylinder 10 and a piston 11, which moves therein and has different surfaces on both sides, with a piston rod 12.
  • the piston 11 divides the working cylinder 10 into a large displacement 13 and a small displacement 14.
  • Each displacement 13, 14 has the Each end has a supply and discharge line 15 or 16 for the working medium, which is subsequently oil, for example is called.
  • the oil is located in a tank 17 (shown in separate parts) and is assigned to the multi-way valve 19 by means of a pump 18, in order to flow from there to the differential cylinder 10 or in connected discharge lines to the tank 17 depending on the position of the valve piston 20.
  • elements that are not important for understanding the invention such as pressure limiting valves, throttle check valves or the like, have been omitted.
  • the multi-way valve 19 has seven openings Tl, AI, P, Bl, T2, A2, B2 in the row, which in this order with the tank 17, the supply and discharge line 15 leading to the large displacement 13, the pump 18, the small displacement 14 leading supply and discharge line 16, the tank 17, a connecting line 22 opening into the line 15 and a further connecting line 23 opening into the supply and discharge line 16 are connected and in the drawn central position of the valve piston 20 (zero position) merge into assigned ring channels within the indicated valve housing. These annular channels are blocked or open in the zero position in a manner to be described by annular collars 21 formed on the valve piston 20.
  • the piston rod 12 extends and the oil displaced from the small cubic capacity 14 is passed via the supply and discharge line 16 and, while the connection B1 is still blocked, the connecting line 23, which removes the effect of the check valve 24, to the connection B2 of the multi-way valve 19 and is conducted fed from here via the opened connection A2 and the connecting line 22 to the supply and discharge line 15 to the large displacement 13, so that the pump 18 only needs to deliver half the quantity with respect to the large displacement 13.
  • valve piston 20 If the valve piston 20 is moved to the right, it is also ensured that the delivery rate of the pump 18 remains unchanged when the piston rod is brought up. On the supply side, this results in a connection of the connections P, Bl via the supply and discharge line 16 to the small cubic capacity 14, while the large cubic capacity 13 via the supply and discharge line 15 and the connection AI blocked against P with Tl and via that of the line 15 outgoing connecting line 22 and the connection A2 is connected to T2, so that there is a division of the oil quantity flowing out of the large displacement 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Ce dispositif sert à commander un cylindre de travail (10) à double effet pourvu d'un piston (11) avec une tige de piston (12) d'un seul côté au moyen d'une vanne à plusieurs voies (19). Quand latige de piston est en position sortie extrême (12) toute la force disponible doit s'exercer sur le piston. La vanne à plusieurs voies utilisée (19) comprend sept ouvertures de raccordement (P, A1, A2, B1, B2, T1, T2) qui servent à commander les fonctions prédéterminées, ces ouvertures étant mises dans les positions individuelles de fonctionnement au moyen d'un piston de vanne correspondant (20).
EP97932719A 1996-07-05 1997-07-02 Dispositif de commande d'un verin differentiel travaillant sur un seul cote Withdrawn EP0907832A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19627086 1996-07-05
DE19627086 1996-07-05
PCT/DE1997/001384 WO1998001677A1 (fr) 1996-07-05 1997-07-02 Dispositif de commande d'un verin differentiel travaillant sur un seul cote

Publications (1)

Publication Number Publication Date
EP0907832A1 true EP0907832A1 (fr) 1999-04-14

Family

ID=7799012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97932719A Withdrawn EP0907832A1 (fr) 1996-07-05 1997-07-02 Dispositif de commande d'un verin differentiel travaillant sur un seul cote

Country Status (4)

Country Link
US (1) US6116142A (fr)
EP (1) EP0907832A1 (fr)
DE (1) DE19780676D2 (fr)
WO (1) WO1998001677A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043899A1 (de) 2000-09-06 2002-03-14 Victus Lebensmittelindustriebe Mehrschichtige Schlauchfolie auf Basis von Polyamid
DE102008059437B3 (de) * 2008-11-27 2010-01-07 Parker Hannifin Gmbh & Co. Kg Hydraulisches Steuerventil mit zwei Steuerkolben für einen einseitig arbeitenden Differentialzylinder
DE102008059435B3 (de) * 2008-11-27 2010-01-07 Parker Hannifin Gmbh & Co. Kg Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder
DE102008059436B3 (de) * 2008-11-27 2010-01-07 Parker Hannifin Gmbh & Co. Kg Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder
DE102009034286B3 (de) * 2009-07-21 2010-11-04 Parker Hannifin Gmbh Hydraulische Schaltungsanordnung zum Steuern eines doppelt wirkenden Arbeitszylinders mittels eine fünf Anschlüsse aufweisenden Steuerventils
DE102010009085B3 (de) * 2010-02-24 2011-03-10 Parker Hannifin Gmbh Hydraulisches Steuerventil für einen einseitig arbeitenden Differentialzylinder mit fünf Steuerkanten
US9273664B2 (en) 2011-02-18 2016-03-01 Parker Hannifin Corporation Hydraulic control valve for a one-sided operating differential cylinder having five control edges

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273468A (en) * 1965-01-26 1966-09-20 Fawick Corp Hydraulic system with regenerative position
US3357451A (en) * 1965-05-24 1967-12-12 Hydraulic Unit Specialities Co Speed and directional control valve for double-acting lift cylinder
US3858485A (en) * 1971-01-27 1975-01-07 Borje O Rosaen Fluid cylinder
DE3000260A1 (de) * 1980-01-05 1981-07-09 Konrad Dipl Ing Meyer Einrichtung zur steuerung eines differentialzylinders
US4840111A (en) * 1986-01-31 1989-06-20 Moog Inc. Energy-conserving regenerative-flow valves for hydraulic servomotors
GB2199115A (en) * 1986-11-27 1988-06-29 Michael David Baxter Spool valve
DE4234647C1 (de) * 1992-10-14 1994-01-27 Karl Hehl Hydraulikeinrichtung an einer Spritzgießmaschine für die Verarbeitung von Kunststoffen oder dergleichen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9801677A1 *

Also Published As

Publication number Publication date
DE19780676D2 (de) 1999-09-09
US6116142A (en) 2000-09-12
WO1998001677A1 (fr) 1998-01-15

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