EP0052709B1 - Distributeur - Google Patents

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Publication number
EP0052709B1
EP0052709B1 EP81107400A EP81107400A EP0052709B1 EP 0052709 B1 EP0052709 B1 EP 0052709B1 EP 81107400 A EP81107400 A EP 81107400A EP 81107400 A EP81107400 A EP 81107400A EP 0052709 B1 EP0052709 B1 EP 0052709B1
Authority
EP
European Patent Office
Prior art keywords
pressure
bore
consumer
annular groove
housing
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
Application number
EP81107400A
Other languages
German (de)
English (en)
Other versions
EP0052709A1 (fr
Inventor
Horst Dr.-Ing. Hesse
Wilhelm Zirps
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0052709A1 publication Critical patent/EP0052709A1/fr
Application granted granted Critical
Publication of EP0052709B1 publication Critical patent/EP0052709B1/fr
Expired 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
    • F15B13/14—Special measures for giving the operating person a "feeling" of the response of the actuated device

Definitions

  • the invention is based on a directional valve according to the preamble of main claim 1.
  • a longitudinal bore 12 is formed in the housing 10 of a directional control valve 11, in which a control slide 13 is guided in a tightly sliding manner.
  • annular grooves 14 to 18 are formed at a distance from one another, an inlet bore 19 running transversely to the longitudinal bore 12 opening into the annular groove 16, from which a delivery line 20 leads to a variable displacement pump 21.
  • This sucks 22 pressure medium from a container 23 via a suction line.
  • Such bores 27, 28, which open into the ring grooves 15, 17, have connection to a consumer, not shown.
  • Two elongated annular grooves 31, 32 are formed on the control slide 13 on both sides of an approximately central collar 30.
  • the control slide projects from one side of the housing and there has a connecting pin 33 which is articulated on a lever, not shown, via which the control slide is actuated.
  • the housing is closed by an approximately screw-shaped locking screw 34, which is screwed into the housing.
  • the control slide 13 has a central blind bore 36, into which a differential piston 37 is immersed, which is mounted in the base 38 of the screw plug slightly in the axial and radial directions, so that it can adjust itself correctly relative to the slide.
  • the large-diameter piston part 37 ′ delimits the inner part of the blind bore 36, which forms a pressure chamber 39.
  • a transverse bore 40 leads to a small annular groove 41 on the outside of the spool 13. From an annular groove 43 adjacent to the annular groove 41, also on the outside of the spool, a transverse bore 44 leads to a pressure chamber 45 formed by the differential piston 37 and the blind bore 36 .
  • a sleeve 47 is screwed, which has an outer collar 48, on which the inner edge of a spring plate 49 rests, while the outer edge of which rests on the bottom 38 of the locking screw 34.
  • a spring plate 49 Opposite the spring plate 49 there is also a spring plate 50 on the sleeve 47, the inner side of which rests against the end face of the control slide.
  • a compression spring 51 which, together with the spring plates, forms a return device for the control slide 13 in a known manner, i.e. this places the spool in the neutral position shown in the drawing when no force is exerted on the spool.
  • a channel 53 leads from the annular groove 14 into the region of the annular groove 41 when the control slide is in the neutral position.
  • a channel 54 running in the housing 10 leads to a location on the longitudinal bore 12 that is close to the left flank 16 ′ of the annular groove 16.
  • a third channel 55 in the housing likewise runs from the annular groove 43 to a point on the longitudinal bore 12 which is close to the right flank 16 "of the annular groove 16.
  • a bore 56 branches off from the channel 55 and opens at the annular groove 41. From the channel 54, a channel 57 emerges, which opens into a housing bore 58 with two seats 59, 60 lying opposite one another.
  • valve bodies 62, 63 of a double check valve 61 are arranged, which are pressed apart by a compression spring 64.
  • a channel 65 running in the housing to the channel 55.
  • a bore 66 leads from the center of the bore 58 to a bore 67 running transversely in the housing 10, from which a control line 68 leads to the pressure regulator 69 of the pump 21.
  • the bore 67 will run through all valves, and from each such bore 67 a corresponding bore 66 leads to the double check valve 61.
  • the pressure medium conveyed by the pump is passed on to the bore 28, from which it flows to the consumer.
  • a certain load pressure builds up there, which is also propagated into the channel 55 via the annular groove 17. From here, the pressure medium reaches the annular grooves 41, 43 under this load pressure and from these in turn via the bores 40, 44 into the pressure chambers 39 and 45 on both sides of the piston 37 '.
  • the highest pressure of the consumers connected to the valves is selected via the double check valves 61 and transmitted into the control line 68 via the bores 66, 67.
  • the pressure prevailing there actuates the pressure regulator 69 of the pump 21 in such a way that the latter is set to the highest consumer pressure which arises.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)

Claims (5)

1. Distributeur (11) comprenant un tiroir (13) coulissant longitudinalement et guidé dans un alésage longitudinal (12) d'un corps de distributeur (10), qui est manoeuvré par un levier de commande manuelle et qui, dans chacune de ses deux positions de travail, établit une liaison entre une source de fluide de pression (21) et au moins un utilisateur à double effet et entre cet utilisateur et un retour (25, 26), où la pression de charge agit de telle manière sur le tiroir (13), par l'intermédiaire d'un piston (37) sur lequel agit la pression d'utilisateur, qu'une force antagoniste de sens contraire à la direction de déplacement du tiroir (13) agit sur celui-ci, caractérisé en ce que le tiroir (13) présente un alésage borgne (36), dans lequel plonge un piston (37), réalisé comme un piston différentiel et attaché au corps (10) du distributeur, de manière à séparer l'une de l'autre, dans l'alésage borgne, deux chambres de pression (39, 45) de sections différentes, en ce que, à une position de travail du distributeur, la chambre de pression (45) de plus petite section est reliée à un côté (27) de l'utilisateur et la chambre de pression (39) de plus grande section est reliée au retour (25) et en ce que à l'autre position de travail, les deux chambres de pression (45, 39) sont reliées à l'autre côté (28) de l'utilisateur.
2. Distributeur selon la revendication 1, caractérisé en ce que la surface extérieure du tiroir (13) présente deux gorges annulaires (41, 43), dont l'une (41) est reliée à la chambre de pression (39) de plus grande section et dont l'autre (43) est reliée à la chambre de pression (45) de plus petite section, et que le corps (10) du distributeur présente un premier canal (55) faisant communiquer l'une (41) des gorges annulaires avec le retour (25), un second canal (54) faisant communiquer l'autre gorge annulaire (43) avec le côté (27) de l'utilisateur mentionné en premier, ainsi qu'un troisième canal (55) d'où part un perçage (56) pour faire communiquer les deux gorges annulaires (43, 41) avec l'autre côté (28) de l'utilisateur.
3. Distributeur selon la revendication 2, caractérisé en ce que chacun des deux canaux (54, 55) mentionnés en dernier débouche dans l'alésage (12) recevant le tiroir (13) près d'un flanc (16', 16") d'une rainure annulaire (16) ménagée dans l'alésage (12) recevant le tiroir et communiquant avec l'orifice de raccordement (19) à la pompe.
4. Distributeur selon l'une des revendications précédentes destiné à être utilisé dans un système hydraulique comportant une pompe réglable (21), caractérisé en ce que le corps (10) du distributeur contient une soupape antiretour double (61) qui transmet la plus haute des deux pressions d'utilisateur commandées par le distributeur (11) au régulateur de pression (69) de la pompe réglable (21
5. Disposition de plusieurs distributeurs selon la revendication (4) en un bloc, caractérisé en ce qu'un perçage (67) traversant tous les distributeurs (11) fait communiquer les sorties (66) des soupapes antiretour double (61) en vue de la transmission de la plus haute de toutes les pressions d'utilisateur au régulateur de pression (69).
EP81107400A 1980-11-26 1981-09-18 Distributeur Expired EP0052709B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3044420 1980-11-26
DE19803044420 DE3044420A1 (de) 1980-11-26 1980-11-26 Wegeventil

Publications (2)

Publication Number Publication Date
EP0052709A1 EP0052709A1 (fr) 1982-06-02
EP0052709B1 true EP0052709B1 (fr) 1984-12-27

Family

ID=6117560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107400A Expired EP0052709B1 (fr) 1980-11-26 1981-09-18 Distributeur

Country Status (2)

Country Link
EP (1) EP0052709B1 (fr)
DE (2) DE3044420A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325772C2 (de) * 1993-07-31 1996-07-11 Peter Dr Ing Beater Antriebssystem mit einem Signalgeber
DE19631803B4 (de) * 1996-08-07 2007-08-02 Bosch Rexroth Aktiengesellschaft Hydraulische Steuervorrichtung
DE19646449A1 (de) * 1996-11-11 1998-05-14 Rexroth Mannesmann Gmbh Steuereinrichtung für einen hydraulischen Verbraucher, insbesondere für das Hubwerk eines Traktors
FR2860008B1 (fr) * 2003-09-24 2006-02-10 Staubli Sa Ets Mecanisme de tirage a ratiere negative et metier a tisser equipe d'un tel mecanisme

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB796496A (en) * 1954-11-02 1958-06-11 British Messier Ltd Improvements in or relating to fluid pressure servo mechanisms
US3152610A (en) * 1961-09-11 1964-10-13 New York Air Brake Co Hydraulic device
DE1696047B2 (de) * 1968-02-02 1976-12-02 J. Walter Co, Maschinen Gmbh, 8640 Kronach Hydraulisch oder pneumatisch angetriebene glaspresse

Also Published As

Publication number Publication date
DE3167960D1 (en) 1985-02-07
DE3044420A1 (de) 1982-06-16
EP0052709A1 (fr) 1982-06-02

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