EP0893605B1 - Dispositif de commande hydraulique - Google Patents
Dispositif de commande hydraulique Download PDFInfo
- Publication number
- EP0893605B1 EP0893605B1 EP19980890181 EP98890181A EP0893605B1 EP 0893605 B1 EP0893605 B1 EP 0893605B1 EP 19980890181 EP19980890181 EP 19980890181 EP 98890181 A EP98890181 A EP 98890181A EP 0893605 B1 EP0893605 B1 EP 0893605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- medium pump
- tank
- working
- 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
Links
Images
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
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/005—With rotary or crank input
- F15B7/006—Rotary pump input
-
- 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
- F15B11/003—Systems with load-holding valves
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
Definitions
- the invention relates to a hydraulic actuation arrangement, in particular for actuating a cover element on a vehicle, with at least a double-acting hydraulic working cylinder, whose working spaces each with one side of a pressure medium pump that can be switched in the direction of its delivery are connected, the two sides of which are parallel to the connection with the working cylinder further with one connected to the tank Shuttle valve are connected.
- the embodiment described is according to the known prior art simply constructed, but has the disadvantage, among other things, that the working cylinder not determined hydraulically when the pressure medium pump is not pumping is because of the pressure medium pump itself or possibly also Change valve a volume equalization or pressure reduction can take place, so that the respective position of the working cylinder or the elements actuated thereby only via separate measures, such as locking devices acting on the piston rod or the like can be held.
- the object of the present invention is a hydraulic actuation arrangement to improve the type mentioned so that the Disadvantages of the corresponding arrangements described in the prior art Technology can be avoided and that in particular in the simplest possible way both one that becomes effective in normal operation with the pressure medium pump stopped hydraulic lock of the arrangement, as well as - in emergency operation - a manual operation the otherwise hydraulically operated elements is possible.
- the check valve over the in the connecting line of Pressure fluid pump can be unlocked to the pressure prevailing in the other work area is. If this measure is not taken, the cylinder contents ejected from the non-pressurized work area be pushed out to the tank via the respective preload valve, which due to the opening pressure to be overcome at the preload valve, always one means some loss of energy in the system. Soferne now with the described Measure ensures that the respective check valve in normal hydraulic operation of the actuator assembly from the opposite Unlocked pressure side, so the hydraulic medium from the reducing cylinder space practically lossless via this unlocked Check valve are pushed out. When the pressure medium pump is not running and thus not unlocked kickback remains the emergency function described above of the respective preload valve fully preserved.
- the hydraulic actuation arrangement shown serves, for example for actuating a cover element, not shown here, on a Vehicle, such as a folding top or the like, and has at least a double-acting hydraulic cylinder 1, the working spaces 2, 3, each with a side that can be switched in its conveying direction Pressure medium pump 4 are connected.
- the working cylinder 1 is here provided with a piston rod 5 led out on one side, which is not on illustrated manner, for example, on a linkage to be operated or such attacks - apart from that could of course also on the other Side a corresponding piston rod be led out, what for some Applications is advantageous or necessary.
- Both sides of the pressure medium pump 4 are parallel to the connection to the Working cylinder 1 further with one connected to the tank 6
- Shuttle valve 7 connected, which in a known manner volume compensation between those with hydraulic adjustment of the working cylinder 1 different large volume changes on the part of workrooms 2 and 3 allows.
- lines 8 to the tank 6 are also provided, in which pressure relief valves 9 are arranged, which divert into the tank 6 when the system pressure is not permissible.
- the opening pressure of the lockable biasing valves 20, 21 is over here only symbolically indicated adjusting element 24 adjustable. Furthermore is to the execution shown to mention that all valves here Pressure relief valves, throttles, not shown, and the like together with the pressure medium pump 4 and the tank 6 in a common, too all connecting lines up to the two connections on the cylinder side 25, 26 have unit 27 are arranged, which is the accommodation the entire actuation arrangement, for example in vehicles with naturally small available space facilitated.
- the Pressure medium pump 4 actuated so that the pressure medium over the in the illustration left check valve 12, the connecting line 10 and the connection 25 is pressed into the work space 2. That from the smaller work space 3 when the piston 28 moves the hydraulic medium pushed out to the right reaches the check valve via the connection 26 and the connecting line 11 13 or to the preload valve 21.
- the check valve 13 via line 15 through the the pump built up on the opposite side is unlocked, so the hydraulic medium ejected from the work space 3 can be carried directly over return the opened check valve 13 to the pump 4.
- the check valve 13 is not can be unlocked, the hydraulic medium ejected from the work area 3 via the bias valve 21 while overcoming its opening pressure be pushed out to the tank 6. In both cases this is in one Center position drawn shuttle valve 7 in its not shown right end position, which is used to fill the larger work area 2 required volume if necessary from the tank 6 to the suction side of the pressure medium pump 4 can be supplemented.
- the left bias valve 20 in the illustration is after this extend the piston rod 5 or the working cylinder 1 on the right Line 22 or the pressure built up there by the pressure medium pump 4, so that in this phase the pressure medium does not go to tank 6 can escape.
- the retraction of the piston rod 5 or the working cylinder 1 in the The display to the left is made simply by reversing the direction of conveyance the pressure medium pump 4.
- the larger one, from the work area 2 as previously described, the volume pushed out is either either (for over the line 14 unlocked check 12) via the shuttle valve 7 or (at a non-releasable check valve 12) via the preload valve 20 pushed out, in the first case the pressure medium pump 4 on the suction side is supplied directly from it and only the rest via the shuttle valve 7 to Tank flows out and in the second case the entire volume via the preload valve 20 runs to the tank, while the pressure medium pump 4 via the shuttle valve 7 draws the required volume from the tank 6.
- both check valves 12, 13 closed, so that from the cylinder 1 or the work rooms 2, 3 ago Hydraulic medium can only flow out via the preload valves 20, 21.
- the Working cylinder 1 is thus hydraulically locked up to one each determined by the opening pressure of the bias valves 20, 21, the for example, manually on the piston rod via the arrangement to be actuated 5 or the piston 28 and thus the respective working space volume can be applied. It is thus possible, for example, to use one such arrangement hydraulically operated tailgate even if the to still close the on-board voltage supplying the pressure medium pump 4 by hand, why only the opening pressure, which is preferably adjustable via the adjusting elements 24 of the respective bias valve 20, 21 must be overcome.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Claims (4)
- Dispositif d'actionnement hydraulique, en particulier pour actionner un élément de recouvrement d'un véhicule automobile, comportant au moins un vérin hydraulique (1) à double effet, dont les chambres de travail (2, 3) sont en liaison avec un côté respectif d'une pompe à fluide sous pression (4) à direction de refoulement inversible, dont les deux côtés sont reliés parallèlement à la liaison avec le vérin hydraulique (1) et de plus avec une soupape à deux voies (7) communiquant avec le réservoir (6), caractérisé en ce que dans la conduite de liaison (10, 11) d'au moins une des deux chambres de travail (2, 3) vers la pompe à fluide sous pression (4) est branchée une soupape anti-retour (12, 13) s'ouvrant dans la direction de cette chambre de travail (2, 3), dont le côté sortie (16, 17) est relié de plus avec le côté entrée (18, 19) d'une soupape de précontrainte (20, 21) s'ouvrant côté sortie vers le réservoir (6), laquelle peut être bloquée via la pression régnant côté entrée de la soupape anti-retour (12, 13).
- Dispositif d'actionnement selon la revendication 1, caractérisé en ce que la soupape anti-retour (12, 13) peut être débloquée via la pression régnant dans la conduite de liaison de la pompe à fluide sous pression (4) vers l'autre chambre de travail respective (2,3).
- Dispositif d'actionnement selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que la pression d'ouverture de la soupape de précontrainte (20, 21) déblocable est réglable.
- Dispositif d'actionnement selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que toutes les soupapes (7, 12, 13, 20, 21) ainsi que le cas échéant aussi des soupapes de limitation de pression (9) additionnelles, des étranglements et similaires, de préférence conjointement avec la pompe à fluide sous pression (4) et le réservoir (6), sont agencé(e)s dans une unité commune (27) présentant aussi toutes les conduites de liaison jusqu'au deux raccords (25, 26) côté vérin hydraulique.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT125097 | 1997-07-23 | ||
AT125097 | 1997-07-23 | ||
AT1250/97 | 1997-07-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0893605A1 EP0893605A1 (fr) | 1999-01-27 |
EP0893605B1 true EP0893605B1 (fr) | 2002-10-09 |
Family
ID=3509850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980890181 Expired - Lifetime EP0893605B1 (fr) | 1997-07-23 | 1998-06-24 | Dispositif de commande hydraulique |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0893605B1 (fr) |
DE (1) | DE59805882D1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT405750B (de) * | 1998-05-22 | 1999-11-25 | Hoerbiger Gmbh | Anordnung zur hydraulischen betätigung eines heckdeckels |
NL1011852C2 (nl) † | 1999-04-21 | 2000-10-24 | Applied Power Inc | Hydraulische bedieningsinrichting voor een afdekkapsamenstel van een voertuig. |
AT408792B (de) * | 1999-11-22 | 2002-03-25 | Hoerbiger Hydraulik | Hydraulische betätigungsanordnung |
IT1314504B1 (it) | 2000-03-02 | 2002-12-18 | Cozzani Mario S R L | Valvola per il controllo di flussi di grande sezione, in particolareper compressori o simili. |
ITMI20060426A1 (it) * | 2006-03-10 | 2007-09-11 | Faac Spa | Sistema di movimentazione con attuatore idraulico a doppio effetto per la movimentazione di cancelli |
WO2007122652A1 (fr) | 2006-04-24 | 2007-11-01 | Inova Srl | Système et mécanisme de découplage de machines hydrauliques |
CN103047123B (zh) * | 2013-01-03 | 2014-12-24 | 北京化工大学 | 一种往复压缩机无级气量调节方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2150260B1 (fr) * | 1971-08-26 | 1974-09-27 | Standard Hydro Arl | |
EP0032300A1 (fr) * | 1980-01-14 | 1981-07-22 | Rotork Controls Limited | Système de commande à fluide |
AT396613B (de) * | 1992-05-15 | 1993-10-25 | Hoerbiger Fluidtechnik Gmbh | Hydraulische betätigungsanordnung für ein fahrzeugverdeck |
-
1998
- 1998-06-24 DE DE59805882T patent/DE59805882D1/de not_active Expired - Lifetime
- 1998-06-24 EP EP19980890181 patent/EP0893605B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59805882D1 (de) | 2002-11-14 |
EP0893605A1 (fr) | 1999-01-27 |
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