EP0683753A1 - Systeme de commande hydraulique pour grue de chargement - Google Patents

Systeme de commande hydraulique pour grue de chargement

Info

Publication number
EP0683753A1
EP0683753A1 EP95903209A EP95903209A EP0683753A1 EP 0683753 A1 EP0683753 A1 EP 0683753A1 EP 95903209 A EP95903209 A EP 95903209A EP 95903209 A EP95903209 A EP 95903209A EP 0683753 A1 EP0683753 A1 EP 0683753A1
Authority
EP
European Patent Office
Prior art keywords
crane
switching
loading crane
control
levers
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Withdrawn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
EP95903209A
Other languages
German (de)
English (en)
Inventor
Franz Sieberer
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.)
Palfinger AG
Original Assignee
Palfinger AG
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
Priority claimed from AT253693A external-priority patent/AT403037B/de
Priority claimed from AT0015794U external-priority patent/AT334U1/de
Application filed by Palfinger AG filed Critical Palfinger AG
Publication of EP0683753A1 publication Critical patent/EP0683753A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • B66C13/54—Operator's stands or cabins
    • B66C13/56—Arrangements of handles or pedals

Definitions

  • the invention relates to a hydraulic control device for a loading crane, wherein, by means of control slides which are arranged next to one another and can be actuated by means of shift levers, on the one hand different functions of the crane itself and on the other hand different functions of an auxiliary device, in particular a support device for the truck carrying the crane, can be activated.
  • Trucks that carry a loading crane are often provided with a support in the form of supports that project laterally from the loading area so that the truck maintains its position when the loading crane is actuated.
  • the control slides and shift levers for actuating this support device are provided in addition to each control slider and shift levers which are necessary for extending and retracting, lifting, lowering and rotating the crane itself.
  • the object of the invention is to considerably reduce the structural complexity of such a control device, with good operability of the control device being guaranteed. This is achieved in that at least some of the control slide switch valves are connected downstream, which depending on their switching position direct the hydraulic fluid coming from the associated control slide either to the crane or to the auxiliary device.
  • the control slides of a loading crane can usually be operated from the left side as well as from the right side of the vehicle by means of a series of shift levers coupled in pairs. Even the number of these Shift lever is generally reduced by the invention, since at least one shift lever or a switching device for the changeover valves is additionally to be provided, on the other hand, however, all other shift levers are now optionally used to actuate the crane or the auxiliary device.
  • Shift levers for actuating a laterally extendable support on the other hand, the measure is known to make the shift levers arranged next to one another inaccessible by flipping up a cover.
  • the hydraulic system cannot be actuated; when the cover is open, each gearshift lever can be swiveled by hand and the loading crane or the support can thus be moved.
  • Another embodiment of a loading crane according to the invention is based on the consideration that an unwanted and, in particular, also unauthorized actuation of the support during crane operation should be made more difficult than hitherto.
  • the switching lever which selects whether the function of the crane or the supporting device can be controlled with the other switching levers, is designed as a switching device which is actuated by the cover.
  • the most important thing is to clearly signal when the support device can be actuated so that it is not inadvertently deactivated, while the crane is loading.
  • the coupling of the switching device to the pivoting position of the cover is therefore preferably carried out in such a way that the cover can be locked in an approximately horizontal intermediate position, in which only the actuation of the support device is possible, whereas with the cover completely folded down, only the actuation of the Loading crane is possible.
  • FIG. 1 shows a hydraulic circuit diagram
  • FIG. 2 shows a graphical representation of a valve block according to the invention
  • FIG. 3 shows a horizontal section through the valve block according to FIG. 2
  • FIGS. 4 to 6 show a graphical representation of an actuating device for the hydraulic drives with open or half-open or closed cover.
  • the hydraulic device for the loading crane of a truck shown in FIG. 1 has, in a known manner, a tank 5, from which the hydraulic fluid reaches the main control block 3 via a pump 6.
  • the control block contains a series of control spools 11 - 14 arranged next to one another. These are constructed as three-way valves, so that hydraulic fluid can optionally be placed in the lines 41 -. 44 or 41 '- 44 • can be pressed.
  • the lines 44, 44 * can be assigned to the double-acting cylinder of the push arm, the lines 43, 43 'to the articulated arm, the lines 42, 42' to the lifting arm of the crane and the lines 41, 41 'to the swivel mechanism of the crane column.
  • the shift levers 21-24 can extend and retract each of the parts mentioned or be held in the rest position.
  • the main control block 3 is followed by a valve block 4, which in the exemplary embodiment shown comprises two changeover valves 1, 2 and a pressure relief valve 9.
  • the structure of the valve block 4 will be described later with reference to FIGS. 2 and 3.
  • the function of the changeover valves 1 and 2 is to make the control slides 11-12 and the associated shift levers 21-22 effective as an alternative to actuating an auxiliary device 61, 62, in the present case the support of a truck. If, for example, the shift lever 31 is shifted from the position shown, the hydraulic fluid reaches the branch 51 or 51 'of the line leading to the support 61 when the shift lever 21 is actuated accordingly.
  • the upper cylinder chamber of the support 61 and the support 62 is assigned a pressure limiting valve 9 which keeps the pressure supplied to the auxiliary device significantly lower than the maximum pressure. which is intended for actuating the loading crane itself.
  • FIG. 2 shows the valve block 4 from which the lines 51, 51 ', 52, 52', 41, 41 'and 42, 42' originate.
  • the internal structure of such a valve block is shown in FIG. 3.
  • the auxiliary device 61, 62 can only be actuated when the corresponding valve rods 71, 72 are pushed in and thus the lines 51, 52 and 51 ', 52' for the hydraulic flow coming from the main control block 3 release liquid.
  • the hydraulic pressure prevailing in the valve block 4 during normal operation of the crane could lead to the degree of filling of the partial cylinders of the auxiliary device 61, 62 gradually increasing and the position of the vehicle thereby changing.
  • horizontally running leak bores 7 are arranged in the valve block 4, which deflect pressure oil escaping via the return line 8.
  • each of the control slides 11-14 can be assigned a changeover switch which enables the activation of a function of the auxiliary device.
  • the shift levers 21-24 for actuating the control slides 11-14 are usually provided in duplicate, namely on the left and right of the vehicle. It can be expedient to assign to the respective series of shift levers 21-24 only those shift levers for the changeover valves which permit the actuation of the respective left or right support device.
  • the changeover valves on one side, for example for the lateral extension and lowering of the supports, can on the other hand be actuated by a single shift lever.
  • FIGS. 4 to 6 An actuating device for the hydraulic drives of a loading crane and the support of the loading crane is shown in FIGS. 4 to 6.
  • the device comprises a main control block 3, which is followed by a valve block 4.
  • the switching levers 21 ff actuate the loading crane 18. If the switching valves 1 and 2 are in the position according to FIG. 5, the same switching lever 21 acts on the support device 61, 62 for the loading crane.
  • the actuation of the changeover valves 1 and 2 by pivoting the cover 19 is essential to the invention.
  • the switch levers 31, 32 for the changeover valves 1 and 2 run parallel to one another.
  • the actuation of the shift lever 21 leads to a movement of the loading crane and not the support. If the cover 19 is now brought into the position according to FIG. 5, it is secured in this position in that the recess 16 clicks into the locking lever 15 on the pin 17.
  • the link 7 connected to the cover 19 is pulled outwards, the shift lever 31 moves into an oblique position and actuates the valve 1.
  • the toothing 10 between the shift levers 31 and 32 ensures that the shift lever 32 is simultaneously in the backdrop 8th moves and the valve 2 actuated.
  • the cover arranged on the opposite side of the vehicle is not actuated Rather, pivotable backdrop 8 remains in its initial position.
  • the shift levers 31 and 32 can also be decoupled, in contrast to the exemplary embodiment shown.
  • the shift levers 21 ff are inaccessible.
  • the changeover valves 1, 2 could therefore only be actuated by the link 8 pulling the shift lever 32 into the inclined position, as has been shown in FIG. 5 for the shift lever 31. In this case, the shift lever 31 would pivot outward within the link 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)

Abstract

L'invention concerne un système de commande hydraulique pour grue de chargement. Des tiroirs de commande (11 à 14) disposés les uns à côté des autres, actionnés au moyen de leviers de commande (21 à 24) permettent d'une part d'activer différentes fonctions de la grue et d'autre part, d'activer différentes fonctions d'un dispositif support (61, 62) pour le camion qui porte la grue, du fait que des soupapes d'inversion (1, 2) sont montées en aval d'au moins une partie des leviers de commande (11 à 14). En fonction de leur position de commande, ces soupapes d'inversion (1, 2) dirigent le fluide hydraulique provenant du tiroir de distribution (11, 12) correspondant soit vers la grue, soit vers le dispositif support (61, 62).
EP95903209A 1993-12-14 1994-12-09 Systeme de commande hydraulique pour grue de chargement Withdrawn EP0683753A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AT2536/93 1993-12-14
AT253693A AT403037B (de) 1993-12-14 1993-12-14 Hydraulische steuereinrichtung für einen ladekran
AT157/94 1994-07-01
AT0015794U AT334U1 (de) 1994-07-01 1994-07-01 Ladekran
PCT/AT1994/000191 WO1995016630A1 (fr) 1993-12-14 1994-12-09 Systeme de commande hydraulique pour grue de chargement

Publications (1)

Publication Number Publication Date
EP0683753A1 true EP0683753A1 (fr) 1995-11-29

Family

ID=25591674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95903209A Withdrawn EP0683753A1 (fr) 1993-12-14 1994-12-09 Systeme de commande hydraulique pour grue de chargement

Country Status (2)

Country Link
EP (1) EP0683753A1 (fr)
WO (1) WO1995016630A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE503986C2 (sv) * 1995-02-08 1996-10-14 Hiab Ab Skyddshölje för reglerspakar
SE9500441L (sv) * 1995-02-08 1996-06-10 Hiab Ab Regleraggregat för fordonsburna kranar
GB2340349B (en) * 1995-04-18 2000-05-03 Mitsubishi Electric Corp Radio data transmission system
SE506050C2 (sv) * 1996-02-16 1997-11-03 Hiab Ab Låsanordning för fordonsburna kranar
SE517230C2 (sv) * 2000-09-21 2002-05-14 Hiab Ab Aggregat för reglering av kranar
SE523691C2 (sv) * 2002-07-02 2004-05-11 Parker Hannifin Ab Manöverbox för manövrering av ett kraftdon
DE202013101202U1 (de) 2013-03-20 2013-03-27 Amf-Fahrzeugbau Gmbh Standsicherheitskontrolleinrichtung sowie Nutzfahrzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171054A (en) * 1976-12-28 1979-10-16 Kubota, Ltd. Work vehicle with hydraulic circuit for swivel motor and work assembly arm motor
JPH0333745Y2 (fr) * 1985-03-29 1991-07-17
DE3901207C2 (de) * 1989-01-17 1994-06-23 Rexroth Mannesmann Gmbh Ventilanordnung für mehrere hydraulische Antriebe, insbesondere für die Antriebe eines Krans

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9516630A1 *

Also Published As

Publication number Publication date
WO1995016630A1 (fr) 1995-06-22

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