EP0399043B1 - Verfahren zur verwendung eines gegliederten armes für baufahrzeuge - Google Patents

Verfahren zur verwendung eines gegliederten armes für baufahrzeuge Download PDF

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Publication number
EP0399043B1
EP0399043B1 EP88910129A EP88910129A EP0399043B1 EP 0399043 B1 EP0399043 B1 EP 0399043B1 EP 88910129 A EP88910129 A EP 88910129A EP 88910129 A EP88910129 A EP 88910129A EP 0399043 B1 EP0399043 B1 EP 0399043B1
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EP
European Patent Office
Prior art keywords
boom
cylinder
bucket
working machine
boom member
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
Application number
EP88910129A
Other languages
English (en)
French (fr)
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EP0399043A4 (en
EP0399043A1 (de
Inventor
Noboru Kanayama
Hisashi Fukumoto
Kuniharu Fujii
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 JP29946587A external-priority patent/JPH0830346B2/ja
Priority claimed from JP29946687A external-priority patent/JPH0830347B2/ja
Priority claimed from JP1823188A external-priority patent/JPH028419A/ja
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Publication of EP0399043A1 publication Critical patent/EP0399043A1/de
Publication of EP0399043A4 publication Critical patent/EP0399043A4/en
Application granted granted Critical
Publication of EP0399043B1 publication Critical patent/EP0399043B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/301—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance

Definitions

  • the present invention relates to a method for operating a working machine for construction vehicles.
  • JP-A 56-150235 and the JP-Y2 60-42123 A working machine similar to that one to be operated by the present method is disclosed by the JP-A 56-150235 and the JP-Y2 60-42123.
  • the working machine according to the JP-Y2 60-42123 comprises
  • the first boom cylinder of this working machine is pivotably supported at its proximal end on the chassis of the working machine through a pivotable bell crank.
  • the bell crank is pivoted by a separate bell crank cylinder to shift the proximal end of the first boom cylinder in such a manner that a dead point situation is avoided when pivoting the first boom by means of the first boom cylinder.
  • the working machine is, as shown in Figs. 1 and 2, arranged such that the proximal end portion of a first boom cylinder 3 is pivotably supported on a bell crank 4 that is pivotably supported on a chassis 1 through a bracket 2, and the bell crank 4 is driven by a bell crank cylinder 5, thereby folding the working machine in a compact form.
  • a hydraulic circuit means including a valve and other elements, for controlling the bell crank cylinder 5. Accordingly, the number of parts increases and the structure becomes complicated, and the production cost also rises. In addition, the operation of the working machine also becomes complicated, and a failure is likely to occur.
  • the prior art involves various problems.
  • the above-mentioned dead point is a position of the link mechanism in which the pivot point at which the first boom member and the distal end portion of the first boom cylinder are connected pivotably to each other, the pivot point at which the proximal end portion of the first boom member is pivotably attached to the chassis and the pivot point at which the proximal end portion of the first boom cylinder is pivotably attached to the chassis align with each other in a straight line during a pivoting motion of the first boom cylinder.
  • no hydraulic pressure from the first boom cylinder acts to the outside.
  • the first boom cylinder cannot function as a driving member.
  • the term "dead point" is used in the sense of the above.
  • JP-Y2 61-2200 describes a working machine comprising a one piece boom which is vertically pivotably supported at its proximal end on a chassis, an arm which is pivotably connected at its proximal end to the distal end of the boom, and a bucket which is pivotably attached to the distal end of the arm.
  • the boom is driven by means of a boom cylinder which is arranged under the boom and attached at its distal end to a mid portion of the boom and at its proximal end to the chassis.
  • the arrangement of the boom and the boom cylinder is such that the boom is always directed frontwardly with respect to the chassis and can be raised and lowered without passing a dead point of the boom cylinder.
  • a bucket retainer is provided on the forward end portion of the chassis.
  • JP-A 53-30105 discloses a working machine which differs from the aforementioned one by the fact that the boom cylinder is not disposed directly under the boom but is displaced laterally so that the boom can pivot between a forwardly directed and rearwardly directed position beyond a dead point of the boom cylinder. To pass this dead point the inertial force of the working machine is used.
  • a bell crank, a bell crank cylinder and hydraulic circuit means for controlling the bell crank cylinder are avoided, thereby lowering the production costs and making the working machine unlikely to have a failure. Further, the operation of the working machine is remarkably simplified.
  • a method of operating the working machine wherein the first boom cylinder is caused to move beyond the dead point by making use of the hydraulic pressure from each of the cylinders, gravitational force and inertia force, which act on the working machine, and counterforce from a bucket retainer provided at the forward end of the chassis of the construct vehicle.
  • the method of operating the working machine comprises the steps of: bringing the second boom cylinder into a floating state and expanding the first boom cylinder to raise the first boom member to near the dead point of the first boom cylinder; expanding and contracting, after the first boom cylinder has reached the vicinity of the dead point, the bucket cylinder to ensure the retaining of the bucket by the bucket retainer and, at the same time, expanding the arm cylinder with the first and second boom cylinders being brought into a floating state; further raising the first boom cylinder beyond the dead point by making use of the counterforce from the bucket retainer, hydraulic pressures from the bucket cylinder and the arm cylinder, or gravitational force and inertia force, which act on the working machine, thereby bringing the working machine to an operational position; expanding and contracting, after completion of work, the bucket cylinder to retain the bucket on the bucket retainer, and expanding the first boom cylinder and contracting the arm cylinder, with the second boom cylinder being brought into a floating state, to move the first boom member to near
  • the method of operating the working machine comprises the steps of: expanding the first boom cylinder to raise the first boom member to near the dead point of the first boom cylinder; expanding and contracting, after the first boom cylinder has reached the vicinity of the dead point, the bucket cylinder to ensure the retaining of the bucket by the bucket retainer, and bringing the first boom cylinder into a floating state and, at the same time, expanding the arm cylinder; further raising the first boom cylinder beyond the dead point and tilting the first boom member toward the forward end of the chassis by making use of the counterforce from the bucket retainer, hydraulic pressures from the cylinders, or gravitational force and inertia force, which act on the working machine; expanding and contracting the arm cylinder to align a pin bore that is formed in the other side of the distal end portion of the first boom member and a pin bore that is formed in the other side of the proximal end portion of the second boom member; inserting, after the two pin bores have been aligned with each other, one or
  • floating state of a cylinder is a state wherein no hydraulic pressure acts on the cylinder, which occurs when each of the ports at the rod and bottom sides of the cylinder is communicated with a tank, for example.
  • this term is used in the sense of the above in the following description.
  • reference numeral 10 denotes a chassis, which is provided with a mounting bracket 11.
  • the proximal end portion of a first boom member 12 is vertically pivotably attached to the mounting bracket 11 throuth a pin member 13.
  • the proximal portion of a second boom member 14 is attached vertically pivotably to the distal end portion of the first boom member 12 through a pin member 15.
  • brackets 16 which are located at the left and right sides, respectively, of the first boom member 12.
  • the proximal end portion of a first boom cylinder 17 is connected to these brackets 16 through a pin member 18, and a piston rod 19 of the first boom cylinder 17 is connected to the upper portion of the first boom member 12 through a pin member 20.
  • a bracket 21 is provided at the rear side of the proximal portion of the first boom member 12.
  • the proximal end portion of a second boom cylinder 22, which serves as a retainer means "A" for the second boom member 14, is connected to the bracket 21 through a pin member 23, and a piston rod 24 of the second boom cylinder 22 is connected to the proximal end portion of the second boom member 14 through a pin member 25.
  • An arm 26 is vertically pivotably attached at the lower side of its proximal portion to the distal end portion of the second boom member 14 through a pin member 27.
  • a bracket 28 is provided on the proximal portion of the second boom member 14.
  • the proximal end portion of an arm cylinder 29 is connected to the bracket 28 through a pin member 30, and a piston rod 31 of the arm cylinder 29 is connected to the proximal end portion of the arm 26 through a pin member 32.
  • a bucket 33 is pivotably attached to the distal end portion of the arm 26 through a pin member 34.
  • One end portion of a link 36 is connected to a rear bracket 35 of the bucket 33, and one end portion of a link 37 is connected to the distal end portion of the arm 26.
  • a bracket 38 is provided on the proximal portion of the arm 26.
  • the proximal end portion of a bucket cylinder 39 is connected to the bracket 38 through a pin member 40, and a piston rod 41 of the bucket cylinder 39 is connected to the joint of the other end portions of the links 36 and 37 through a pin member 42.
  • an element which is denoted by reference numeral 43 at the lower side of the forward end portion of the chassis is a bucket retainer for retaining the bucket 33 when the working machine is folded.
  • Fig. 4 shows a hydraulic control circuit which relates to the hydraulic cylinders for driving the working machine of the present invention. Since this hydraulic control circuit is the same as the one which has heretofore generally been employed to operate this type of working machine, detailed description thereof is omitted.
  • Fig. 3 is a side view of the working machine that is folded compactly in such a condition that the first boom cylinder 17 is pivoted to a position below the pivot point 13 at which the proximal end portion of the first boom member 12 is pivotably attached to the chassis 10, and with the second boom cylinder 22 being expanded and the arm cylinder 29 being contracted so that the second boom member 14 and the arm 26 are substantially parallel to each other, the bucket 33 is retained by the bucket retainer 43 on the chassis 10 by the operation of a bucket actuating apparatus.
  • the second boom cylinder 22 is contracted to raise each of the elements of the working machine which are closer to the distal end of the machine than the second boom member 14, as shown in Fig. 5.
  • the first boom cylinder 17 is expanded.
  • the first boom member 12 rises in such a manner as to pivot upwardly, and the center of gravity G of the working machine also moves forwardly.
  • the hydraulic pressure in the first boom cylinder 12 rises to reach a set relief pressure, so that the pivoting of the first boom member 12 is suspended.
  • the second boom cylinder 22 is actuated so that the center of gravity G of the working machine moves to a position which is forward of the pivot point 13 at which the proximal end portion of the first boom member 12 is pivotably attached to the chassis 10.
  • the working machine If, in the above-described state, the first boom cylinder 17 is brought into a floating state, the working machine further pivots forwardly by gravity, as shown in Fig. 6, and consequently the first boom cylinder 17 passes the pivot point 13. Thereafter, the working machine assumes an operational position, as shown in Fig. 7, so that it is possible to perform work by an operation which is similar to that in the prior art.
  • the working machine pivots rearwardly by gravity and consequently the first boom cylinder 17 passes the pivot point 13, resulting in the working machine assuming a position such as that shown in Fig. 5.
  • the working machine can be brought into the folded position that is shown in Fig. 3 by the operation that has been described at the beginning of this embodiment.
  • the point 20 at which the piston rod 19 of the first boom cylinder 17 is pivotably attached to the first boom member 12 is on the pin member 15 that connects together the first boom member 12 and the second boom member 14.
  • Figs. 10 and 11 are views which are employed to explain one method of operating the above-described working machine.
  • counterforce from the bucket retainer 43 is utilized in addition to the hydraulic pressure from each cylinder and the inertia force resulting from the gravity that acts on the working machine, while ensuring the retaining of the bucket by the bucket retainer 43.
  • the first boom cylinder 17 has "dead point in the link mechanism", which will be explained below. That is, the pivot point 20 at which the first boom member 12 and the distal end portion of the first boom cylinder 17 are connected pivotably to each other, the pivot point 13 at which one side of the proximal end portion of the first boom member 12 is pivotably attached to the chassis 10 and the pivot point 18 at which the proximal end portion of the first boom cylinder 17 is pivotably attached to the chassis 10 align with each other in a straight line C during a pivoting motion of the first boom cylinder 17.
  • the position B on the straight line C of the pivot point 20 at which the distal end portion of the first boom cylinder 17 is pivotally attached is called the dead point of the first boom cylinder 17.
  • FIG. 12 A modified working machine is shown in Fig. 12.
  • the third embodiment employs as a position retaining means A for the second boom member 14 one or a plurality of fixing pins 45 which are inserted into a pin bore 25a that is bored in the other side of the distal end portion of the first boom member 12 and a pin bore 44 that is bored in the other side of the proximal end portion of the second boom member 14a, when these pin bores 25a and 44 align with each other.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Shovels (AREA)
  • Jib Cranes (AREA)

Claims (4)

  1. Verfahren zum Betreiben einer Arbeitsmaschine für Baufahrzeuge, mit:
    - einem Ausleger, der in ein erstes und zweites Auslegerglied (12,14) unterteilt ist, die mit einem Fahrgestell (10) in der genannten Reihenfolge verbunden sind, welches erste Auslegerglied (12) senkrecht schwenkbar an einer Seite seines fahrzeugseitigen Endes in einem Schwenkpunkt (13) an einer vorgegebenen Position des Fahrgestells (10) über einen Ansatz (11) gelagert und an seinem entfernten Ende mit einer Seite des fahrzeugseitigen Endes des zweiten Auslegergliedes (14) so verbunden ist, daß das zweite Auslegerglied (14) senkrecht schwenkbar ist;
    - einem Arm (26), der schwenkbar mit dem fahrzeugfernen Bereich des zweiten Auslegergliedes (14) verbunden ist;
    - einem Armzylinder (29), der schwenkbar zwischen dem fahrzeugseitigen Ende des Armes (26) und einer vorgegebenen Position des zweiten Auslegergliedes (14) angeordnet ist;
    - einer Schaufel (33), die schwenkbar an dem fahrzeugfernen Ende des Armes (26) angebracht ist;
    - einem Schaufelzylinder (39), der schwenkbar zwischen dem fahrzeugseitigen Ende der Schaufel (33) und einer vorgegebenen Position des Armes (26) angeordnet ist;
    - einem Schaufelhalter (43), der am vorderen Endbereich des Fahrgestells (10) angeordnet ist und zum Halten der Schaufel (33) dient, wenn der Arm (26) in bezug auf das zweite Auslegerglied (14) zur Erzeugung einer Gegenkraft auf dem zweiten Auslegerteil (14) bewegt wird;
    - einem ersten Auslegerzylinder (17), der schwenkbar an seinem fahrzeugseitigen Ende an dem Fahrgestell (10) und an seinem fahrzeugfernen Ende am fahrzeugfernen Ende des zweiten Auslegergliedes (12) angebracht ist und das erste Auslegerglied (12) senkrecht schwenkt;
    - welcher erste Auslegerzylinder (17) direkt an seinem fahrzeugseitigen Ende an einer anderen vorgegebenen Position des Fahrgestells (10) über einen weiteren Ansatz (16) angebracht ist;
    - einer Halteeinrichtung (22,45), die zwischen dem ersten und zweiten Auslegerglied (12,14) befestigt ist und das zweite Auslegerglied (14) in einer angehobenen Position in bezug auf das erste Auslegerglied (12) hält;
    - wobei der Schwerpunkt (G) der Arbeitsmaschine zwischen einer ersten Position vor dem Schwenkpunkt (13) und einer zweiten Position hinter diesem Schwenkpunkt (13) verschiebbar ist, wenn das zweite Auslegerglied (14) und/oder der Arm (26) relativ zu dem ersten Auslegerglied (12) so bewegt werden, daß der erste Auslegerzylinder (17) hinter seinen Totpunkt (B) bewegt wird;
    - welcher erste Auslegerzylinder (17) hinter seinen ersten Totpunkt (B) bewegt wird durch Verwendung des hydraulischen Drucks jedes der Zylinder (17,22,29,39), der Schwerkraft, die auf die Arbeitsmaschine einwirkt, und der Gegenkraft des Schaufelhalters (43).
  2. Verfahren nach Anspruch 1, gekennzeichnet durch die folgenden Schritte:
    - Schaffen eines zweiten Auslegerzylinders (22) als Halteeinrichtung, die das erste und zweite Auslegerglied (12,14) verbindet;
    - Überführen des zweiten Auslegerzylinders (22) in einen Schwebezustand und Ausfahren des ersten Auslegerzylinders (17) zum Anheben des ersten Auslegergliedes (12) in die Nähe des Totpunktes (B),
    - Ausfahren und Einziehen des Schaufelzylinders (39), nachdem der erste Auslegerzylinder (17) die Nähe seines Totpunktes (B) erreicht hat, zur Gewährleistung des Haltens der Schaufel (33) durch den Schaufelhalter (43) und zugleich Ausfahren des Armzylinders (29), während der erste und zweite Auslegerzylinder (17,22) in einen Schwebezustand gebracht werden, zum Anheben des ersten Auslegerzylinders (17) über dessen Totpunkt (B) hinaus durch verwendung der Gegenkraft des Schaufelhalters (43) und des hydraulischen Druckes des Schaufelzylinders (39) und des Armzylinders (29) und damit Überführen der Arbeitsmaschine in eine Betriebsposition;
    - Ausfahren und Einziehen des Schaufelzylinders (39) nach Beendigung der Arbeit zum Halten der Schaufel (33) an dem Schaufelhalter (43) und Ausfahren des ersten Auslegerzylinders (17) und Einziehen des Armzylinders (29), während der zweite Auslegerzylinder (22) in einen Schwebezustand gebracht ist, zum Bewegen des ersten Auslegergliedes (12) in die Nähe des Totpunktes (B); und
    - allmähliches Überführen des ersten und zweiten Auslegerzylinders (17, 22) in einen Schwebezustand, nachdem das erste Auslegerglied (12) den Totpunkt (B) durch Schwerkraft oder Trägheitskraft, die auf die Arbeitsmaschine wirken, überwunden hat, oder Überführen des zweiten Auslegerzylinders (22) in einen Schwebezustand und Einziehen des ersten Auslegerzylinders (17) zum Falten des ersten und zweiten Auslegergliedes unter Verwendung der Schwerkraft, die auf die Arbeitsmaschine einwirkt.
  3. Verfahren nach Anspruch 1, gekennzeichnet durch die folgenden Schritte:
    - Schaffen einer Anzahl von Stiftgliedern (45) als Halteeinrichtung, die in einer ersten Stiftbohrung (25a) in der anderen Seite des fahrzeugfernen Endbereichs des ersten Auslegergliedes (12) und einer zweiten Stiftbohrung (44) in der anderen Seite des fahrzeugseitigen Endbereichs des zweiten Auslegergliedes (14) vorgesehen sind, wenn diese beiden Stiftbohrungen (25a,44) miteinander ausgerichtet sind;
    - Ausfahren des ersten Auslegerzylinders (17) zum Anheben des ersten Auslegergliedes (12) in die Nähe des Totpunkts (B);
    - Ausfahren und Einziehen des Schaufelzylinders (39), nachdem der erste Auslegerzylinder (17) die Nähe seines Totpunkts (B) erreicht hat, zur Gewährleistung des Haltens der Schaufel (33) durch den Schaufelhalter (43) und Überführen des ersten Auslegerzylinders (17) in einen Schwebezustand und zugleich Ausfahren des Armzylinders (29);
    - weiteres Anheben des ersten Auslegerzylinders (17) über seinen Totpunkt (B) hinaus und Kippen des ersten Auslegergliedes (12) in Richtung des vorderen Endes des Fahrgestells (10) unter Verwendung der Gegenkraft von dem Schaufelhalter (43) und des hydraulischen Druckes des Schaufelzylinders (39) und der Auslegerzylinder (17,22);
    - Ausfahren und Einziehen des Armzylinders (29) zum Ausrichten der ersten und zweiten Stiftbohrung (25a,44);
    - nach dem Ausrichten der Stiftbohrungen (25a,44) Einfügen eines oder einer Anzahl von Befestigungsstiften (45) in die Stiftbohrungen (25a,44) zur Beibehaltung einer Betriebsposition der Arbeitsmaschine;
    - Betätigung aller Zylinder (17,29,39) nach Beendigung der Arbeit zum Halten der Schaufel (33) an dem Schaufelhalter (43);
    - leichtes Ausfahren und Einziehen des ersten Auslegerzylinders (17) nach dem Festlegen der Schaufel (33) zum Entfernen der Befestigungsstifte (45);
    - Ausfahren des ersten Auslegerzylinders (17) und des Schaufelzylinders (39), nachdem die Befestigungsstifte (45) entfernt worden sind, bei gleichzeitigem Halten der Schaufel (33) an dem Schaufelhalter (43) durch Ausfahren des Armzylinders (29) zum Bewegen des ersten Auslegergliedes (12) in die Nähe seines Totpunktes (B);
    - allmähliches Überführen des ersten Auslegerzylinders (17) in einen Schwebezustand oder Einziehen des Zylinders, nachdem das erste Auslegerglied (12) den Totpunkt (B) unter Einwirkung der Schwerkraft oder der Trägheitskraft, die auf die Arbeitsmaschine wirken, passiert hat, zum Einklappen des ersten und zweiten Auslegergliedes (12,14) unter Verwendung der Schwerkraft, die auf die Arbeitsmaschine wirkt;
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der fahrzeugferne Endbereich des ersten Auslegerzylinders (17) schwenkbar mit einem Gelenk (15) am fahrzeugfernen Endbereich des ersten Auslegergliedes (12) und der einen Seite des fahrzeugseitigen Endbereichs des zweiten Auslegergliedes (14) verbunden ist.
EP88910129A 1987-11-26 1988-11-25 Verfahren zur verwendung eines gegliederten armes für baufahrzeuge Expired - Lifetime EP0399043B1 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP29946587A JPH0830346B2 (ja) 1987-11-26 1987-11-26 油圧式掘削機の作業機姿勢変更装置及び方法
JP299465/87 1987-11-26
JP299466/87 1987-11-26
JP29946687A JPH0830347B2 (ja) 1987-11-26 1987-11-26 油圧式掘削機の作業機姿勢変更装置及び方法
JP18231/88 1988-01-28
JP1823188A JPH028419A (ja) 1988-01-28 1988-01-28 油圧掘削機の作業機収納方法
PCT/JP1988/001198 WO1989004894A1 (en) 1987-11-26 1988-11-25 Working machine for construction vehicles and method of operating same

Publications (3)

Publication Number Publication Date
EP0399043A1 EP0399043A1 (de) 1990-11-28
EP0399043A4 EP0399043A4 (en) 1991-09-25
EP0399043B1 true EP0399043B1 (de) 1996-01-10

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EP88910129A Expired - Lifetime EP0399043B1 (de) 1987-11-26 1988-11-25 Verfahren zur verwendung eines gegliederten armes für baufahrzeuge

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EP (1) EP0399043B1 (de)
DE (1) DE3854897T2 (de)
WO (1) WO1989004894A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3313784B2 (ja) * 1992-09-30 2002-08-12 株式会社小松製作所 建設機械の作業機装置
US5423655A (en) * 1993-01-14 1995-06-13 Kabushiki Kaisha Komatsu Seisakusho Working machine for hydraulic excavator
FR2718769B1 (fr) * 1994-04-13 1996-05-31 Gibert Pierre Jean Marie Ensemble compact de deux bras articulés, dont l'extrémité libre est équipée d'un porte équipement, destiné à des véhicules de manutention, et terrassement.
JP3446847B2 (ja) * 1994-11-08 2003-09-16 株式会社小松製作所 作業車両

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS47947B1 (de) * 1966-11-18 1972-01-11

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185523B (de) * 1961-04-29 1965-01-14 Liebherr Hans Abbaugeraet fuer Ton
JPS4879101U (de) * 1971-12-28 1973-09-28
DE2459489A1 (de) * 1974-07-18 1976-01-29 Krone Bernhard Gmbh Maschf Planiergeraet
JPS5920443Y2 (ja) * 1979-07-27 1984-06-14 株式会社豊田自動織機製作所 スキツドステアシヨベルにおけるリフトア−ム
JPS6042123Y2 (ja) * 1980-04-17 1985-12-23 株式会社小松製作所 油圧式掘削機
JPS62103860U (de) * 1985-12-20 1987-07-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS47947B1 (de) * 1966-11-18 1972-01-11

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DE3854897D1 (de) 1996-02-22
DE3854897T2 (de) 1996-08-14
EP0399043A4 (en) 1991-09-25
EP0399043A1 (de) 1990-11-28
WO1989004894A1 (en) 1989-06-01

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