EP0333066B1 - Earth-moving machine, in particular a shovel loader - Google Patents

Earth-moving machine, in particular a shovel loader Download PDF

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Publication number
EP0333066B1
EP0333066B1 EP89104284A EP89104284A EP0333066B1 EP 0333066 B1 EP0333066 B1 EP 0333066B1 EP 89104284 A EP89104284 A EP 89104284A EP 89104284 A EP89104284 A EP 89104284A EP 0333066 B1 EP0333066 B1 EP 0333066B1
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EP
European Patent Office
Prior art keywords
lifting arm
vehicle
shovel loader
tilting
cylinder
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
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EP89104284A
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German (de)
French (fr)
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EP0333066A1 (en
Inventor
Karl Friedrich
Dieter Maly
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Kramer Werke GmbH
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Kramer Werke GmbH
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Application filed by Kramer Werke GmbH filed Critical Kramer Werke GmbH
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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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
    • 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
    • E02F3/283—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 single arm pivoted directly on the chassis
    • 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
    • E02F3/34—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3405—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
    • 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
    • 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
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • E02F9/024—Travelling-gear, e.g. associated with slewing gears with laterally or vertically adjustable wheels or tracks

Definitions

  • the invention relates to a work vehicle, in particular a shovel loader with a centrally located loading system projecting from the front, on the lifting arm of which a lifting cylinder, a rocker arm and, at the front end, a quick-change device are articulated, which is articulated via a rocker arm to the rocker arm which can be actuated by a rocker cylinder and, viewed from the side, protrudes slightly downward over the wheel space.
  • Shovel loaders of this type are known (cf. DE-A-16 58 038 or GB-A-1 522 510). In the case of such shovel loaders, only the rear wheels can be steered in order to ensure stability in work; in addition, the front cantilever loading system would not allow sufficient steering lock of the front wheels.
  • the loading system extends from the front of the vehicle over the center of the vehicle to the rear of the vehicle, so that the driver's cab is only on the side next to the Loading system finds space. This impairs both the driver's view of the work area and the all-round view.
  • the invention has for its object to design the loading system in a generic work vehicle in such a way that the operation of the work vehicle is facilitated, on the one hand by a better view for the driver of the vehicle and on the other hand by an improved maneuverability of the vehicle.
  • the loading system should be designed in such a way that it tolerates steerable front wheels with a steering angle of over 40 °, without the tilting stability of the vehicle about its transverse axis being impaired by the external forces introduced via the loading system.
  • this object is achieved on a generic work vehicle by that the vehicle-side end of the lifting arm engages in a channel-like, open-front recess of the front part of the vehicle frame, and that the lifting cylinder and the tilt cylinder are articulated below the lifting arm on the front part, the lifting arm having projecting side profile legs on the vehicle side, so that it has both Covers the cylinder towards the front.
  • the construction according to the invention allows the driver's cab to be relatively far forward, i.e. can be arranged close to the work field and with respect to the longitudinal axis of the vehicle, whereby the operation of the work vehicle is facilitated.
  • both the lifting cylinder and the tilt cylinder are arranged below the lifting arm, i.e. inside the recess in the front section, results in their advantageous coverage by the lifting arm, this protection being further improved in that the lifting arm has projecting lateral profile legs on the vehicle side.
  • Both hydraulic cylinders are thus protected in a special way against exposure to the work item.
  • This protection can be further improved in that at least the tilt cylinder partially enters the interior of the lifting arm.
  • both cylinders can also be pivotally arranged within closely adjacent planes.
  • a box profile, to which the profile legs are attached laterally, or a simple U-profile is preferred as the profile cross section for the lifting arm.
  • the lifting arm is designed as a narrow component, so that even with front wheels with a large steering angle there is space in the wheel space, even if it is lowered to the maximum. In this position, the loading shovel is located directly in front of the front wheels, which improves the tipping stability under load or enables the counterweights to be dimensioned lower.
  • the deep arrangement of the lifting arm also gives the driver an optimal view of the work area and a clear all-round view.
  • a shovel loader shown schematically in FIG. 1 has a loading system 3 arranged centrally on the front part 1 of its frame 2.
  • the loading system 3 comprises a lifting arm 4 which is articulated in the interior of a channel-like recess 6 of the front part 1 so that it can pivot about the horizontal axis 5 .
  • a quick-change device 7 shown in FIG. 2 in the plan view, is fastened with laterally projecting receiving bolts 8 for the bucket hook. 2
  • the steerable front wheels 9 of the shovel loader are drawn in the straight-ahead position.
  • the right front wheel is shown with a dashed line 10 and the left front wheel with a dotted line 11, each in the position with extreme steering lock.
  • FIG. 1 shows that the two cylinders are articulated below the pivot axis 5 of the lifting arm 4 inside the recess 6 of the front part 1 of the shovel loader. It can be seen from the sectional view through the loading device shown in FIG. 3 that the two cylinders can be moved in closely adjacent planes behind the lifting arm 4; they partially engage between the lateral profile legs 38, which project beyond the rear wall 39 of the lifting arm 4, which is box-shaped in cross section.
  • the lower end of the lifting cylinder 14 is articulated with its lower end on a holding bracket 15 on the rear wall 39 of the lifting arm 4.
  • the lower end of the tilt cylinder 13 is articulated on the lower end 16 of a rocker arm 17, which around a center axis 18 mounted in the lifting arm 4 can be pivoted.
  • the upper end 19 of the rocker arm 17 is articulated to the upper end 20 of the quick-change device 7 via a tilt rod 21.
  • FIG. 4 shows a side view of the quick-change device 7 with the mounting bolts 8 arranged above for a shovel hook 22, which is provided on the rear of a loading shovel 23 indicated by a dash-dotted line.
  • the quick-change device has locking bolts 24 which can be extended and retracted hydraulically in the axial direction and which engage in corresponding bores of eyes 25 provided on the underside of the loading shovel.
  • the eyes 25 and the shovel hook 22 are formed on opposite webs 26 on the rear of the loading shovel 23.
  • the mounting bolts 8 for the bucket hook are formed by the ends of a continuous shaft 27 projecting on opposite sides of the quick-change device 7.
  • the shaft 27 is non-rotatable and axially immovable in a corresponding bore in the upper end 20 of the quick-change device 7 stored.
  • the pivot bearing 28 of the lower end of the tilt rod 21 is articulated in the middle of the shaft.
  • bearing bolts 30 are formed laterally, which pivotably engage in corresponding bushings 29 of the quick-change device 7.
  • the end piece of the lifting arm 4 has a central receiving bore 38 for the locking bolts 24 which, with their inner ends 31, adjoin a central pressure chamber 32 which can be acted upon by hydraulic medium.
  • Two further pressure chambers 33 are formed on the back of the piston parts 34 at the inner end of the locking bolts 24. If the pressure chamber 32 is pressurized via a central pressure line 35, the two locking bolts 24 extend; If the central space 32 is depressurized and the two outer pressure lines 36 are pressurized with pressure medium to the pressure spaces 33, both locking bolts 24 move in and thus release the eye 25 of the loading shovel 23.
  • a sealing element 37 which is firmly connected to the bearing bush, but can be removed, in the bore of which the section of the locking bolt 24 with a smaller diameter is guided, which enables it to be easily installed in the receiving bore 40.

Description

Die Erfindung betrifft ein Arbeitsfahrzeug, insbesondere einen Schaufellader mit frontseitig auskragender, mittig angeordneter Ladeanlage, an deren Hubarm ein Hubzylinder, eine Kippschwinge und, am vorderen Ende, eine Schnellwechselvorrichtung angelenkt sind, welche über eine Kippstange mit der durch einen Kippzylinder betätigbaren Kippschwinge gelenkig verbunden ist und, von der Seite gesehen, über den Radzwischenraum nach unten geringfügig vorspringt.The invention relates to a work vehicle, in particular a shovel loader with a centrally located loading system projecting from the front, on the lifting arm of which a lifting cylinder, a rocker arm and, at the front end, a quick-change device are articulated, which is articulated via a rocker arm to the rocker arm which can be actuated by a rocker cylinder and, viewed from the side, protrudes slightly downward over the wheel space.

Schaufellader dieser Art sind bekannt (vgl. DE-A-16 58 038 oder GB-A-1 522 510). Bei derartigen Schaufelladern sind nur die Hinterräder lenkbar, um die Standfestigkeit im Arbeitseinsatz zu gewährleisten; außerdem würde die frontseitig auskragende Ladeanlage keinen ausreichenden Lenkeinschlag der Vorderräder ermöglichen.Shovel loaders of this type are known (cf. DE-A-16 58 038 or GB-A-1 522 510). In the case of such shovel loaders, only the rear wheels can be steered in order to ensure stability in work; in addition, the front cantilever loading system would not allow sufficient steering lock of the front wheels.

Bei den bekannten Schaufelladern erstreckt sich die Ladeanlage von der Frontseite des Fahrzeugs über die Fahrzeugmitte bis in den hinteren Teil des Fahrzeugs, so daß das Führerhaus nur seitlich neben der Ladeanlage Platz findet. Dadurch ist sowohl die Sicht des Fahrzeugführers auf das Arbeitsfeld als auch die Rundumsicht behindert.In the known shovel loaders, the loading system extends from the front of the vehicle over the center of the vehicle to the rear of the vehicle, so that the driver's cab is only on the side next to the Loading system finds space. This impairs both the driver's view of the work area and the all-round view.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, bei einem gattungsgemäßen Arbeitsfahrzeug die Ladeanlage derart zu gestalten, daß die Bedienung des Arbeitsfahrzeugs erleichtert wird, einerseits durch eine bessere Sicht für den Führer des Fahrzeugs und andererseits durch eine verbesserte Manövrierfähigkeit des Fahrzeugs. Speziell soll die Ladeanlage so gestaltet sein, daß sie lenkbare Vorderräder mit einem Lenkeinschlag von über 40° toleriert, ohne daß dabei durch die über die Ladeanlage eingeleiteten äußeren Kräfte die Kippstabilität des Fahrzeugs um dessen Querachse beeinträchtigt wird.In contrast, the invention has for its object to design the loading system in a generic work vehicle in such a way that the operation of the work vehicle is facilitated, on the one hand by a better view for the driver of the vehicle and on the other hand by an improved maneuverability of the vehicle. In particular, the loading system should be designed in such a way that it tolerates steerable front wheels with a steering angle of over 40 °, without the tilting stability of the vehicle about its transverse axis being impaired by the external forces introduced via the loading system.

Erfindungsgemäß wird diese Aufgabe an einem gattungsgemäßen Arbeitsfahrzeug dadurch gelöst,
daß das fahrzeugseitige Ende des Hubarms in eine kanalartige, nach vorne offene Ausnehmung der Frontpartie des Fahrzeugs rahmens eingreift, und daß der Hubzylinder und der Kippzylinder unterhalb des Hubarmes an der Frontpartie angelenkt sind, wobei der Hubarm fahrzeugseitig vorspringende seitliche Profilschenkel aufweist, so daß er beide Zylinder nach vorne hin abdeckt.According to the invention, this object is achieved on a generic work vehicle by
that the vehicle-side end of the lifting arm engages in a channel-like, open-front recess of the front part of the vehicle frame, and that the lifting cylinder and the tilt cylinder are articulated below the lifting arm on the front part, the lifting arm having projecting side profile legs on the vehicle side, so that it has both Covers the cylinder towards the front.

Durch diese Ausgestaltung ist gewährleistet, daß bei erhöhter Manövrierfähigkeit der Huarm für die um die Querachse des Fahrzeugs auftretenden Kippmomente besonders klein ist; hierzu trägt nicht nur das Eintauchen des Hubarms in den Radzwischenraum, sondern auch dessen tiefe Anlenkung in einer Ausnehmung der Frontpartie des Schaufelladers bei. Darüber hinaus gestattet der erfindungsgemäße Aufbau, daß das Führerhaus relativ weit vorne, d.h. nahe beim Arbeitsfeld und bezüglich der Fahrzeuglängsachse mittig angeordnet sein kann, wodurch die Bedienung des Arbeitsfahrzeuges erleichtert wird.This configuration ensures that, with increased maneuverability, the arm is particularly small for the tilting moments occurring about the transverse axis of the vehicle; This is not only due to the fact that the lifting arm plunges into the space between the wheels, but also its deep articulation in a recess in the front part of the shovel loader. Furthermore, the construction according to the invention allows the driver's cab to be relatively far forward, i.e. can be arranged close to the work field and with respect to the longitudinal axis of the vehicle, whereby the operation of the work vehicle is facilitated.

Dadurch, daß sowohl der Hubzylinder als auch der Kippzylinder unterhalb des Hubarmes, also im Inneren der Ausnehmung der Frontpartie angeordnet sind, ergibt sich deren vorteilhafte Abdeckung durch den Hubarm, wobei dieser Schutz noch dadurch verbessert wird, daß der Hubarm fahrzeugseitig vorspringende seitliche Profilschenkel aufweist. Beide Hydraulikzylinder sind dadurch in besonderer Weise gegenüber einer Einwirkung durch das Arbeitsgut geschützt. Dieser Schutz kann noch dadurch weiter verbessert werden, daß zumindest der Kippzylinder teilweise in das Innere des Hubarms eintritt. Dort können auch beide Zylinder innerhalb eng nebeneinander liegender Ebenen schwenkbar angeordnet sein.The fact that both the lifting cylinder and the tilt cylinder are arranged below the lifting arm, i.e. inside the recess in the front section, results in their advantageous coverage by the lifting arm, this protection being further improved in that the lifting arm has projecting lateral profile legs on the vehicle side. Both hydraulic cylinders are thus protected in a special way against exposure to the work item. This protection can be further improved in that at least the tilt cylinder partially enters the interior of the lifting arm. There, both cylinders can also be pivotally arranged within closely adjacent planes.

Als Profilquerschnitt für den Hubarm kommt bevorzugt ein Kastenprofil in Frage, an welchem die Profilschenkel seitlich angesetzt sind, oder aber ein einfaches U-Profil. Im übrigen ist der Hubarm als schmales Bauteil ausgebildet, so daß er selbst bei Vorderrädern mit großem Lenkeinschlag im Radzwischenraum Platz findet, auch wenn er maximal abgesenkt ist. In dieser Position befindet sich die Ladeschaufel unmittelbar vor den Vorderrädern, wodurch unter Last die Kippstabilität verbessert bzw. eine niedrigere Bemessung der Ausgleichsgewichte ermöglicht wird. Durch die tiefe Anordnung des Hubarms ergibt sich außerdem für den Fahrer eine optimale Sicht auf das Arbeitsfeld und eine freie Rundumsicht.A box profile, to which the profile legs are attached laterally, or a simple U-profile is preferred as the profile cross section for the lifting arm. In addition, the lifting arm is designed as a narrow component, so that even with front wheels with a large steering angle there is space in the wheel space, even if it is lowered to the maximum. In this position, the loading shovel is located directly in front of the front wheels, which improves the tipping stability under load or enables the counterweights to be dimensioned lower. The deep arrangement of the lifting arm also gives the driver an optimal view of the work area and a clear all-round view.

Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigt:

  • Figur 1: eine Seitenansicht eines Schaufelladers,
  • Figur 2: eine Draufsicht auf den Schaufellader gemäß Fig. 1,
  • Figur 3: einen Querschnitt gemäß III-III durch die Ladeanlage des Schaufelladers,
  • Figur 4: eine Seitenansicht der Schnellwechselvorrichtung und
  • Figur 5: einen Schnitt gemäß V-V der Fig. 4.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
  • FIG. 1: a side view of a shovel loader,
  • FIG. 2: a top view of the shovel loader according to FIG. 1,
  • FIG. 3: a cross section according to III-III through the loading system of the shovel loader,
  • Figure 4 is a side view of the quick-change device and
  • 5 shows a section according to VV of FIG. 4th

Ein in Figur 1 schematisch in der Seitenansicht dargestellter Schaufellader besitzt eine mittig an der Frontpartie 1 seines Rahmens 2 angeordnete Ladeanlage 3. Die Ladeanlage 3 umfaßt einen Hubarm 4 , welcher um die waagerechte Achse 5 schwenkbar im Inneren einer kanalartigen Ausnehmung 6 der Frontpartie 1 angelenkt ist. Am vorderen Ende des Hubarms 4 ist eine in Figur 2 in der Daraufsicht dargestellte Schnellwechselvorrichtung 7 mit seitlich vorspringenden Aufnahmebolzen 8 für den Schaufelhaken befestigt. In der Draufsicht gemäß Figur 2 sind die lenkbaren Vorderräder 9 des Schaufelladers in Geradeausstellung gezeichnet. Außerdem ist das rechte Vorderrad mit einer strichlierten Linie 10 und das linke Vorderrad mit einer punktierten Linie 11, jeweils in der Stellung mit extremen Lenkeinschlag, eingezeichnet. Man erkennt ohne weiteres , daß in allen Radstellungen der Hubarm 5 im Radzwischenraum ohne weiteres Platz findet, wobei lediglich die Schnellwechselvorrichtung 7 mit ihrem unteren Ende 12, welches am vorderen Ende des Hubarms 4 angelenkt ist, geringfügig über den Radzwischenraum vorspringt. In der Figur 1 ist das rechte Vorderrad 9 in der Stellung gemäß der strichlierten Linie 10 in Figur 2 dargestellt.A shovel loader shown schematically in FIG. 1 has a loading system 3 arranged centrally on the front part 1 of its frame 2. The loading system 3 comprises a lifting arm 4 which is articulated in the interior of a channel-like recess 6 of the front part 1 so that it can pivot about the horizontal axis 5 . At the front end of the lifting arm 4, a quick-change device 7, shown in FIG. 2 in the plan view, is fastened with laterally projecting receiving bolts 8 for the bucket hook. 2, the steerable front wheels 9 of the shovel loader are drawn in the straight-ahead position. In addition, the right front wheel is shown with a dashed line 10 and the left front wheel with a dotted line 11, each in the position with extreme steering lock. One can easily see that in all wheel positions Lift arm 5 easily finds space in the wheel space, with only the quick-change device 7 with its lower end 12, which is articulated at the front end of the lifting arm 4, projecting slightly beyond the wheel space. In Figure 1, the right front wheel 9 is shown in the position according to the dashed line 10 in Figure 2.

Die Anordnung des Kippzylinders 13 und des Hubzylinders 14 zur Betätigung der Ladeanlage ergibt sich aus den Figuren 1 und 3. Figur 1 zeigt, daß die beiden Zylinder unterhalb der Schwenkachse 5 des Hubarms 4 im Inneren der Ausnehmung 6 der Frontpartie 1 des Schaufelladers angelenkt sind. Aus der in Figur 3 gezeigten Schnittdarstellung durch die Ladeeinrichtung wird erkennbar, daß die beiden Zylinder in dicht nebeneinander liegenden Ebenen hinter dem Hubarm 4 bewegbar sind; sie greifen dabei teilweise zwischen die seitlichen Profilschenkel 38, welche über die Rückwand 39 des im Querschnitt kastenförmigen Hubarms 4 vorspringen, ein. Der zu unterst angeordnete Hubzylinder 14 ist mit seinem unteren Ende an einer Haltelasche 15 auf der Rückwand 39 des Hubarms 4 gelenkig abgestützt. Das untere Ende des Kippzylinders 13 ist am unteren Ende 16 einer Kippschwinge 17 angelenkt, welche um eine im Hubarm 4 gelagerte Mittelachse 18 verschwenkbar ist. Das obere Ende 19 der Kippschwinge 17 ist mit dem oberen Ende 20 der Schnellwechselvorrichtung 7 über eine Kippstange 21 gelenkig verbunden.The arrangement of the tilt cylinder 13 and the lifting cylinder 14 for actuating the loading system results from FIGS. 1 and 3. FIG. 1 shows that the two cylinders are articulated below the pivot axis 5 of the lifting arm 4 inside the recess 6 of the front part 1 of the shovel loader. It can be seen from the sectional view through the loading device shown in FIG. 3 that the two cylinders can be moved in closely adjacent planes behind the lifting arm 4; they partially engage between the lateral profile legs 38, which project beyond the rear wall 39 of the lifting arm 4, which is box-shaped in cross section. The lower end of the lifting cylinder 14 is articulated with its lower end on a holding bracket 15 on the rear wall 39 of the lifting arm 4. The lower end of the tilt cylinder 13 is articulated on the lower end 16 of a rocker arm 17, which around a center axis 18 mounted in the lifting arm 4 can be pivoted. The upper end 19 of the rocker arm 17 is articulated to the upper end 20 of the quick-change device 7 via a tilt rod 21.

Figur 4 zeigt eine Seitenansicht der Schnellwechselvorrichtung 7 mit den oben angeordneten Aufnahmebolzen 8 für einen Schaufelhaken 22, welcher an der Rückseite einer mit strich-punktierter Linie angedeuteten Ladeschaufel 23 vorgesehen ist. Am unteren Ende 12 besitzt die Schnellwechselvorrichtung in axialer Richtung hydraulisch ein- und ausfahrbare Arretierungsbolzen 24, welche in entsprechende Bohrungen von an der Unterseite der Ladeschaufel vorgesehenen Augen 25 eingreifen. Die Augen 25 und der Schaufelhaken 22 sind an gegenüberliegenden Stegen 26 an der Rückseite der Ladeschaufel 23 ausgebildet.FIG. 4 shows a side view of the quick-change device 7 with the mounting bolts 8 arranged above for a shovel hook 22, which is provided on the rear of a loading shovel 23 indicated by a dash-dotted line. At the lower end 12, the quick-change device has locking bolts 24 which can be extended and retracted hydraulically in the axial direction and which engage in corresponding bores of eyes 25 provided on the underside of the loading shovel. The eyes 25 and the shovel hook 22 are formed on opposite webs 26 on the rear of the loading shovel 23.

Gemäß der Schnittdarstellung nach Figur 5 ist erkennbar, daß die Aufnahmebolzen 8 für den Schaufelhaken durch die an gegenüberliegenden Seiten der Schnellwechselvorrichtung 7 vorspringenden Enden einer durchgehenden Welle 27 gebildet sind. Die Welle 27 ist drehfest und axial unverschieblich in einer entsprechenden Bohrung im oberen Ende 20 der Schnellwechselvorrichtung 7 gelagert. In der Wellenmitte ist das Schwenklager 28 des unteren Endes der Kippstange 21 angelenkt.According to the sectional view according to FIG. 5 it can be seen that the mounting bolts 8 for the bucket hook are formed by the ends of a continuous shaft 27 projecting on opposite sides of the quick-change device 7. The shaft 27 is non-rotatable and axially immovable in a corresponding bore in the upper end 20 of the quick-change device 7 stored. The pivot bearing 28 of the lower end of the tilt rod 21 is articulated in the middle of the shaft.

Am unteren Ende des Hubarms 4 sind seitlich Lagerbolzen 30 ausgebildet, welche in entsprechende Buchsen 29 der Schnellwechselvorrichtung 7 schwenkbar eingreifen. Das Endstück des Hubarms 4 besitzt eine zentrische Aufnahmebohrung 38 für die Arretierungsbolzen 24, die mit ihren inneren Enden 31 an einen mit Hydraulikmedium beaufschlagbaren zentralen Druckraum 32 angrenzen. Zwei weitere Druckräume 33 sind auf der Rückseite der Kolbenteile 34 am inneren Ende der Arretierungsbolzen 24 gebildet. Wird über eine zentrale Druckleitung 35 der Druckraum 32 unter Druck gesetzt, so fahren die beiden Arretierungsbolzen 24 aus; ist der zentrale Raum 32 drucklos und werden die beiden äußeren Druckleitungen 36 mit Druckmedium zu den Druckräumen 33 beaufschlagt, so fahren beide Arretierungsbolzen 24 ein und geben damit das Auge 25 der Ladeschaufel 23 frei. Ein mit der Lagerbuchse fest verbundendes, aber lösbares Dichtungselement 37, in dessen Bohrung der im Durchmesser schwächere Abschnitt der Arretierungsbolzen 24 geführt ist, ermöglicht deren einfache Montage in der Aufnahmebohrung 40.At the lower end of the lifting arm 4, bearing bolts 30 are formed laterally, which pivotably engage in corresponding bushings 29 of the quick-change device 7. The end piece of the lifting arm 4 has a central receiving bore 38 for the locking bolts 24 which, with their inner ends 31, adjoin a central pressure chamber 32 which can be acted upon by hydraulic medium. Two further pressure chambers 33 are formed on the back of the piston parts 34 at the inner end of the locking bolts 24. If the pressure chamber 32 is pressurized via a central pressure line 35, the two locking bolts 24 extend; If the central space 32 is depressurized and the two outer pressure lines 36 are pressurized with pressure medium to the pressure spaces 33, both locking bolts 24 move in and thus release the eye 25 of the loading shovel 23. A sealing element 37, which is firmly connected to the bearing bush, but can be removed, in the bore of which the section of the locking bolt 24 with a smaller diameter is guided, which enables it to be easily installed in the receiving bore 40.

Claims (4)

1. Earth-moving vehicle, in particular shovel loader with a loading apparatus (3) arranged centrally and projecting from the front side, on the lifting arm (4) of which a lifting cylinder (14), a tilting rocker arm (17) and, at the front end, a quick-change device (7) are pivoted, which device (7) is pivotally connected by way of a tilting rod (21) to the tilting rocker arm (17) able to be actuated by a tilting cylinder (13) and, seen from the side, projects downwards slightly beyond the intermediate space between the wheels,
characterised in that
the end of the lifting arm (4) adjacent the vehicle engages in a channel-like recess (6), which is open on the front, of the front part (1) of the vehicle chassis (2) and that the lifting cylinder (14) and the tilting cylinder (13) are pivoted below the lifting arm (4) on the front part (1), the lifting arm (4) comprising lateral sectional arms (38) projecting adjacent the vehicle, so that it covers both cylinders towards the front.
2. Shovel loader according to Claim 1,
characterised in that
the driver's cab is located centrally with respect to the longitudinal axis of the vehicle.
3. Shovel loader according to Claim 1,
characterised in that
at least the tilting cylinder (13) partially enters the inside of the lifting arm (4).
4. Shovel loader according to Claim 1,
characterised in that
both cylinders are arranged to tilt inside the lifting arm within planes lying closely one beside the other.
EP89104284A 1988-03-12 1989-03-10 Earth-moving machine, in particular a shovel loader Expired - Lifetime EP0333066B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808313 1988-03-12
DE3808313A DE3808313A1 (en) 1988-03-12 1988-03-12 WORK VEHICLE, IN PARTICULAR LOADER

Publications (2)

Publication Number Publication Date
EP0333066A1 EP0333066A1 (en) 1989-09-20
EP0333066B1 true EP0333066B1 (en) 1992-06-10

Family

ID=6349588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104284A Expired - Lifetime EP0333066B1 (en) 1988-03-12 1989-03-10 Earth-moving machine, in particular a shovel loader

Country Status (3)

Country Link
EP (1) EP0333066B1 (en)
JP (1) JPH01235731A (en)
DE (2) DE3808313A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4010224C2 (en) * 1990-03-30 1994-05-19 Porsche Ag Quick change device
DE4211078C2 (en) * 1992-04-03 1995-05-24 Orenstein & Koppel Ag Hoist for work equipment on loading vehicles
DE4223734C2 (en) * 1992-07-18 1996-04-18 Orenstein & Koppel Ag Quick change device
FI944214A0 (en) * 1994-02-09 1994-09-13 Airi Raunisto Snabbkopplingsanordning
DE19800164A1 (en) * 1998-01-05 1999-07-22 Orenstein & Koppel Ag Mobile loading machine with front loading equipment
DE102019117715A1 (en) 2018-06-29 2020-01-02 Liebherr-Werk Bischofshofen Gmbh working machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1087372A (en) * 1966-03-03 1967-10-18 Bamford Excavators Ltd Improvements in or relating to earth moving machines
GB1200176A (en) * 1966-11-14 1970-07-29 Winget Ltd Improvements in or modifications of loaders
US3648871A (en) * 1970-02-19 1972-03-14 Layton Mfg Co Vehicle loader
US3935953A (en) * 1974-06-24 1976-02-03 Caterpillar Tractor Co. Implement mounting means for earthworking vehicles
GB1522510A (en) * 1976-12-09 1978-08-23 Rmc Group Serv Ltd Working platforms and support means therefor
DE3200800C2 (en) * 1982-01-13 1986-08-14 Kramer-Werke GmbH, 7770 Überlingen Shovel loader

Also Published As

Publication number Publication date
DE3808313C2 (en) 1990-10-18
DE3808313A1 (en) 1989-09-28
JPH01235731A (en) 1989-09-20
EP0333066A1 (en) 1989-09-20
DE58901618D1 (en) 1992-07-16

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