EP0089578B1 - Système hydraulique - Google Patents

Système hydraulique Download PDF

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Publication number
EP0089578B1
EP0089578B1 EP83102414A EP83102414A EP0089578B1 EP 0089578 B1 EP0089578 B1 EP 0089578B1 EP 83102414 A EP83102414 A EP 83102414A EP 83102414 A EP83102414 A EP 83102414A EP 0089578 B1 EP0089578 B1 EP 0089578B1
Authority
EP
European Patent Office
Prior art keywords
line
control valve
flap
directional control
unit according
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
EP83102414A
Other languages
German (de)
English (en)
Other versions
EP0089578A3 (en
EP0089578A2 (fr
Inventor
Horst Dr. Dipl.-Ing. Hesse
Hartmut Dipl.-Ing. Sandau
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 EP0089578A2 publication Critical patent/EP0089578A2/fr
Publication of EP0089578A3 publication Critical patent/EP0089578A3/de
Application granted granted Critical
Publication of EP0089578B1 publication Critical patent/EP0089578B1/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor

Definitions

  • the invention is based on a hydraulic system according to the preamble of the main claim.
  • a hydraulic system according to the preamble of the main claim.
  • the entire pressure medium conveyed by the pump must be drained off via a pressure relief valve in the “lowering” operating state. This means not only a loss of energy, but also the oil is heated in an undesirable manner by the flow resistance at the pressure relief valve.
  • the hydraulic system according to the invention with the characterizing features of the main claim has the advantage that, when a single-acting working cylinder is connected to the hydraulic network, a direct, resistance-free discharge of the pump to the container is possible in the "lowering" operating state. This means significant energy savings.
  • a pump 10 sucks pressure medium from a container 11 and displaces it into a line 12, which leads to a 4/3-way valve 13. This can take the switch positions I to 111.
  • a pressure relief valve 14 is connected to the delivery line 12 and has a connection to the container 11.
  • a first line 16 leads to a line coupling 17 and a second line 18 to a second line coupling 19.
  • a 2/2-way valve 20 is connected to the line 18, via which a line 21 leads from the line 18 to the container 11 leads.
  • the return line 22 from the directional control valve 13 is also connected to the line 21.
  • a line 24 is connected to the first line coupling 17 and leads to the pressure chamber 25 of a single-acting working cylinder 26.
  • the line coupling 19 can be closed by a flap 27 which is pivotally arranged on a bracket 28 fixed to the housing. At the other end of the lever-like flap 27, a spring 30 engages, which presses the flap 27 onto the line coupling.
  • the directional control valve 20 is operatively connected to the flap 27 and can be shifted by the flap 27 into one of its two switching positions I or 11, 1 being a blocking position.
  • a line 31 shown in dashed lines leads from the line coupling 19 to the other pressure chamber of the working cylinder, which, however, is not further designated.
  • FIG. 2 and 3 shows a practical embodiment.
  • the flap 27 is fastened on an axis 37 and is pressed onto the line coupling 17 by means of two torsion springs 35, 36.
  • a housing is attached to the housing 38 receiving the flap 27 and has a blind bore 40 in which a control slide 41 is guided in a tightly sliding manner. This is pressed with its port set 42 by the force of a spring 43 arranged in the blind bore 40 against the flap 27.
  • the Control slide 41 has an elongated annular groove 44, in the area of which two transverse bores 45, 46 open into the blind bore 40 when the flap 27 is closed.
  • the pressure medium flowing in the line 18 can then - as described above - flow to the container via the transverse bore 45, the annular groove 44, the transverse bore 46 and the line 21. If the flap 27 is folded up for the purpose of connecting a line to the coupling 17, the control slide 41 interrupts the connection between the two transverse bores 45, 46.
  • FIG. 4 shows a modification of that according to FIGS. 2 and 3.
  • a plunger 50 lies against the flap 27.
  • the plunger has a conical region 51 and a part in the part lying in the blind bore 40 on this following cylindrical region 52, against which, when the flap 27 is closed, the tappet 53 of a seat valve 54 bears.
  • the seat valve is open in this operating state. After the flap has been opened for the purpose of connecting a line to the coupling 17, the tappet 53 reaches the end of the conical region 51, as a result of which the seat valve 54 is closed. In this state, no pressure medium can flow from line 18 to line 21, as described at the beginning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (5)

1°) Installation hydraulique comportant un vérin (26), à simple ou à double effet auquel est fourni, à partir d'un réservoir (11), au moyen d'une pompe (10), par l'intermédiaire d'une soupape à voies multiples (13) et de prolongateurs (17, 19) montés à la suite, disposés sur les conduites de sortie (16, 18) de la soupape à voies multiples (13), ainsi que des conduites d'alimentation (24, 37) qui peuvent être raccordées aux précédentes, installation caractérisée en ce que l'on peut fermer un des prolongateurs (19), quand la conduite d'alimentation (31) est désaccouplée, au moyen d'un volet (27) qui est en liaison d'action avec une soupape de commande (20), et qu'il peut être établi, par l'intermédiaire de cette soupape (20) de commande, en fonction de la position du volet, une communication (12, 18,21) de la pompe (10) jusqu'au réservoir (11) en passant par la soupape (13) à voies multiples et la conduite de sortie (18) qui va au prolongateur (19).
2°) Installation suivant la revendication 1, caractérisée en ce que la soupape de commande (20) est une soupape à 2/2 voies.
3°) Installation suivant la revendication 1 et/ou 2, caractérisée en ce que le volet (27) est poussé dans sa position de fermeture par au moins un ressort (30, 35, 36).
4°) Installation suivant l'une des revendications 1 à 3, caractérisée en ce que la soupape de commande (20) est realisée sous la forme d'un tiroir de commande (41) qui s'applique, par un prolongement (42), sur le volet (27), sous la force d'un ressort (43).
5°) Installation suivant l'une des revendications 1 à 3, caractérisée en ce que la soupape de commande est réalisée sous la forme d'une soupape à siàge (54) qui est actionnée par un poussoir qui s'applique sur le volet (27) sous la force d'un ressort.
EP83102414A 1982-03-23 1983-03-11 Système hydraulique Expired EP0089578B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823210519 DE3210519A1 (de) 1982-03-23 1982-03-23 Hydraulikanlage
DE3210519 1982-03-23

Publications (3)

Publication Number Publication Date
EP0089578A2 EP0089578A2 (fr) 1983-09-28
EP0089578A3 EP0089578A3 (en) 1984-09-12
EP0089578B1 true EP0089578B1 (fr) 1986-06-11

Family

ID=6158992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102414A Expired EP0089578B1 (fr) 1982-03-23 1983-03-11 Système hydraulique

Country Status (2)

Country Link
EP (1) EP0089578B1 (fr)
DE (2) DE3210519A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3313039A1 (de) * 1983-04-12 1984-10-18 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung
DE3833999A1 (de) * 1988-10-06 1990-04-12 Bosch Gmbh Robert Hydraulische steuereinrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954800A (en) * 1960-01-04 1960-10-04 Corson Bros Inc Hydraulic system

Also Published As

Publication number Publication date
DE3210519A1 (de) 1983-10-06
EP0089578A3 (en) 1984-09-12
EP0089578A2 (fr) 1983-09-28
DE3364016D1 (en) 1986-07-17

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