EP0046214B1 - Dispositif de commande pour l'actionnement hydraulique d'une lame racleuse montée à un chasse-neige - Google Patents

Dispositif de commande pour l'actionnement hydraulique d'une lame racleuse montée à un chasse-neige Download PDF

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Publication number
EP0046214B1
EP0046214B1 EP81105890A EP81105890A EP0046214B1 EP 0046214 B1 EP0046214 B1 EP 0046214B1 EP 81105890 A EP81105890 A EP 81105890A EP 81105890 A EP81105890 A EP 81105890A EP 0046214 B1 EP0046214 B1 EP 0046214B1
Authority
EP
European Patent Office
Prior art keywords
lifting cylinder
pressure
hydraulic
cylinders
lifting
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
EP81105890A
Other languages
German (de)
English (en)
Other versions
EP0046214A3 (en
EP0046214A2 (fr
Inventor
Alfred Schmidt
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.)
Ing Alfred Schmidt GmbH
Original Assignee
Ing Alfred Schmidt 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 Ing Alfred Schmidt GmbH filed Critical Ing Alfred Schmidt GmbH
Priority to AT81105890T priority Critical patent/ATE9827T1/de
Publication of EP0046214A2 publication Critical patent/EP0046214A2/fr
Publication of EP0046214A3 publication Critical patent/EP0046214A3/de
Application granted granted Critical
Publication of EP0046214B1 publication Critical patent/EP0046214B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
    • E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades

Definitions

  • the invention relates to a control device with an electrically or hydraulically controllable hydraulic control valve for the hydraulic actuation of a snow plow attached to a clearing vehicle, the ploughshare of which is connected via a handlebar parallelogram to a device plate attached to the vehicle and can be actuated by means of hydraulic cylinders supported between the device plate and the ploughshare, of which a centrally located lifting cylinder for the lifting / lowering movement and two side-mounted diverter cylinders for the right / left pivoting of the ploughshare are provided.
  • a snow plow of the specified type has become known through the advertising letter "Multi-share spring plows type MF" from Ing. Alfred Schmidt GmbH from June 1975, the control being carried out via a switching device arranged in the interior of the driver's cab. Regarding such control devices, reference is made to US-A-4 028 820.
  • the invention is based on the object of designing a control device of the type mentioned at the outset in such a way that when the ploughshare which is always horizontal is raised and lowered, a certain pivoting position of the ploughshare in relation to a vertical axis of rotation can be maintained or lowering a tension in the articulation elements, in particular blocking the changeover cylinder, automatically, d. H. without intervention by the driver.
  • control valve can be controlled to avoid kinematic constraints when lifting or lowering depending on the pressure in the lifting cylinder and after a pressure increase in the lifting cylinder up to a predetermined upper liquid pressure, the hydraulic lines to the two changeover cylinders with one leading to a liquid container Return line connects and which, due to the resulting pressure drop in the lifting cylinder, only interrupts this connection when a predetermined lower liquid pressure in the lifting cylinder is reached.
  • the invention provides that the predetermined upper or lower fluid pressure in the lifting cylinder can be adjusted in a variable manner. It goes without saying within the scope of the invention that the upper liquid pressure is to be chosen lower than that required to unlock the pressure relief valves. ge pressure.
  • control valve as ent is formed lockable check valve, which is switched into a connecting line between the hydraulic lines to the two changeover cylinders and can be switched via a pulse generator controlled by the pressure in the lifting cylinder.
  • the hydraulic control valve can be operated electrically or hydraulically.
  • Fig. 1 shows an oblique top view of the front of a motor vehicle to which a device plate 1 is attached.
  • a handlebar parallelogram consisting of an upper pair of links 2 and a lower pair of links 3 is articulated on the device plate 1.
  • Both pairs of links 2, 3 are each pivotally pivoted about a (not shown) horizontal axis on a vertical pipe section 4, on which a vertical frame part 5 of the ploughshare 6 is suspended pivotably about the longitudinal axis of the pipe section 4.
  • the rear view of the ploughshare shown in the top view like the horizontal frame part 8 connected to it via short webs 7, is shown in a greatly simplified manner for the sake of clarity of the drawing.
  • the two changeover cylinders 9, 10 are articulated on the horizontal frame part 8 so as to be pivotable about vertical axes. These are hinged at their other ends to the device plate 1, pivotable about horizontal axes.
  • a lifting cylinder 11 is articulated, on the one hand, on a pipe bend 12 that raises the device plate, and, on the other hand, on the lower pair of links 3, each pivotable about horizontal axes.
  • the ploughshare 6 is drawn in the extreme right swivel position, in which the right change cylinder 9 is shortened to the maximum, the left, also telescopic change cylinder 10 is extended to the maximum.
  • the control device comprises a hydraulic control valve 18 which, depending on the pressure pulse in the pressure chamber 15 of the lifting cylinder 11, can either be switched hydraulically, as shown in more detail, via an electrical circuit or alternatively, as indicated by a double dashed line H.
  • the electrical circuit comprises a pressure-sensitive pulse generator 19, which is connected on the one hand to the corresponding hydraulic line 16 of the lifting cylinder 11 and on the other hand closes a switch 20 of a circuit S when an upper fluid pressure is reached, as a result of which the hydraulic control valve 18 switches from the illustrated switching position to the switching position 11 becomes.
  • the pulse generator 19 causes an interruption in the circuit S and the control valve returns to its starting position I.
  • the switching process described can be repeated several times during a lifting movement.
  • the intervals with the switching point 11 are so short that there is no fear of the ploughshare 6 tipping over into another swivel position during the pressure relief of the changeover cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Regulating Braking Force (AREA)

Claims (3)

1. Dispositif de commande avec une soupape de commande hydraulique (18) actionnée électriquement ou hydrauliquement pour agir sur une charrue chasse-neige, montée sur un véhicule de déblayage d'enneigement, dont le soc (6) est relié par l'intermédiaire d'un parallélogramme de bielles à une plaque de support d'appareil (1) fixée sur le véhicule, et peut être actionnée au moyen de trois cylindres de vérins hydrauliques supportés entre la plaque d'appui et le soc de charrue, l'un de ces vérins étant disposé au milieu (11) en vue d'un déplacement de soulèvement et d'abaissement du soc, et les deux autres (9, 10) étant prévus pour réaliser un déplacement de positionnement du soc latéralement vers la droite et vers la gauche, dispositif caractérisé en ce que la soupape de commande (18), en vue d'éviter des contraintes de traction cinématiques lors du soulèvement et de l'abaissement du soc, est commandée, indépendamment de la pression régnant dans le vérin de levage (11), pour être reliée, jusqu'à une pression de fluide supérieure prédéterminée dans les conduites hydrauliques (23, 24) allant vers les deux vérins (9, 10), à une conduite de retour (26) conduisant à un réservoir de fluide (27) et, après la chute de pression exigée dans le cylindre du vérin de levage (11), pour interrompre cette liaison, une fois atteinte une pression de fluide inférieure prédéterminée dans ce cylindre (11).
2. Dispositif de commande suivant la revendication 1, caractérisé en ce que la pression supérieure, ainsi que la pression inférieure prédéterminées dans le cylindre du vérin de levage (11) sont modifiables et réglables à des niveaux choisis.
3. Dispositif de commande suivant l'une des revendications 1 ou 2, caractérisé en ce que la soupape de commande (18) est constituée comme une soupape d'arrêt antiretour, qui est insérée dans une conduite de liaison (21) s'étendant entre les conduites hydrauliques (23, 24) allant vers les deux vérins (9, 10) de changement de position, et qui peut être mise en service par l'intermédiaire d'une générateur d'impulsions commandé par la pression régnant dans le cylindre du vérin de levage (11 ).
EP81105890A 1980-08-16 1981-07-25 Dispositif de commande pour l'actionnement hydraulique d'une lame racleuse montée à un chasse-neige Expired EP0046214B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105890T ATE9827T1 (de) 1980-08-16 1981-07-25 Steuervorrichtung fuer die hydraulische betaetigung eines an einem raeumfahrzeug angebauten schneepflugs.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3031037A DE3031037C2 (de) 1980-08-16 1980-08-16 Steuervorrichtung für die hydraulische Betätigung eines an einem Räumfahrzeug angebauten Schneepflugs
DE3031037 1980-08-16

Publications (3)

Publication Number Publication Date
EP0046214A2 EP0046214A2 (fr) 1982-02-24
EP0046214A3 EP0046214A3 (en) 1982-03-10
EP0046214B1 true EP0046214B1 (fr) 1984-10-10

Family

ID=6109779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105890A Expired EP0046214B1 (fr) 1980-08-16 1981-07-25 Dispositif de commande pour l'actionnement hydraulique d'une lame racleuse montée à un chasse-neige

Country Status (4)

Country Link
EP (1) EP0046214B1 (fr)
AT (1) ATE9827T1 (fr)
DE (1) DE3031037C2 (fr)
NO (1) NO812764L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29507623U1 (de) * 1995-05-08 1995-07-20 Gießler, Matthias, Dipl.-Ing. (FH), 77933 Lahr Hydraulische Entlastungsvorrichtung für Anbaugeräte

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111882A3 (fr) * 1982-12-13 1984-07-25 Ing. Alfred Schmidt Gmbh Chasse-neige
GB8505955D0 (en) * 1985-03-07 1985-04-11 Econ Group Plc Mounting of snow ploughs
DE3602758A1 (de) * 1986-01-30 1987-08-20 Daimler Benz Ag Schneepflug
DE3932944A1 (de) * 1988-10-06 1990-04-12 Schmidt Alfred Ing Gmbh Vorrichtung zum anbau eines schneepfluges an ein fahrzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH361022A (de) * 1957-08-24 1962-03-31 Schneeraeumungs Maschinen Ag Hebe- und Schwenkvorrichtung für eine einseitig räumende Pflugschar
US4028820A (en) * 1975-12-31 1977-06-14 Douglas Dynamics Corporation Hydraulic system for vehicle mounted snowplow blade
US4187763A (en) * 1978-03-31 1980-02-12 Gould Inc. Overload relief valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29507623U1 (de) * 1995-05-08 1995-07-20 Gießler, Matthias, Dipl.-Ing. (FH), 77933 Lahr Hydraulische Entlastungsvorrichtung für Anbaugeräte

Also Published As

Publication number Publication date
DE3031037C2 (de) 1982-11-04
DE3031037A1 (de) 1982-03-04
EP0046214A3 (en) 1982-03-10
ATE9827T1 (de) 1984-10-15
EP0046214A2 (fr) 1982-02-24
NO812764L (no) 1982-02-17

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