EP0524490B1 - Dredger - Google Patents

Dredger Download PDF

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Publication number
EP0524490B1
EP0524490B1 EP92111627A EP92111627A EP0524490B1 EP 0524490 B1 EP0524490 B1 EP 0524490B1 EP 92111627 A EP92111627 A EP 92111627A EP 92111627 A EP92111627 A EP 92111627A EP 0524490 B1 EP0524490 B1 EP 0524490B1
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EP
European Patent Office
Prior art keywords
loader
frame
undercarriage
backhoe
rest
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
EP92111627A
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German (de)
French (fr)
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EP0524490A1 (en
Inventor
Hans Schaeff
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.)
Karl Schaeff GmbH and Co Maschinenfabrik
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Karl Schaeff GmbH and Co Maschinenfabrik
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Application filed by Karl Schaeff GmbH and Co Maschinenfabrik filed Critical Karl Schaeff GmbH and Co Maschinenfabrik
Publication of EP0524490A1 publication Critical patent/EP0524490A1/en
Application granted granted Critical
Publication of EP0524490B1 publication Critical patent/EP0524490B1/en
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    • 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
    • E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
    • 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
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/166—Cabins, platforms, or the like, for drivers movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine

Definitions

  • the invention relates to a backhoe loader with a chassis frame, which at the front end has a loader frame with loading arm and loading shovel and at the other end a superstructure which can be rotated through 360 °, on one side a driver's cab and on the other side next to the driver's cab, the drive units and one around a vertical axis pivotable extension bracket for a boom are arranged.
  • the boom in the raised state with the dipper stick folded and the working tool has a rest position set forwards for road travel to the side outside the field of vision of the driver's cab, with a front fender arranged in front of the mounting bracket serving as a storage space for the working tool.
  • a mobile excavator is combined with the corresponding rotatable superstructure with a conventional loading device arranged on the front of the chassis frame.
  • the superstructure is pivoted backwards with the boom assembly, so that depending on the superstructure's angle of rotation, digging can be carried out in an extension of the longitudinal center axis of the undercarriage frame or offset to the side. Beyond that too side digging possible.
  • the uppercarriage During loader operation and when driving on roads, the uppercarriage remains pivoted forward into the rest position with the boom mounted on the side next to the driver's cab, whereby the driver's cab allows a clear view of the loading shovel, since the raised boom and the dipper stick folded down remain to the side outside the field of vision.
  • the work tool is located on the fender on the side opposite the driver's cab.
  • the invention has for its object to improve the known backhoe loader so that a quick repositioning of the superstructure including the boom assembly of excavation work for loading work or for road travel, without dismantling or repositioning an excavator or loader part, is only guaranteed by simple control operations without special attention.
  • the rest position of the boom assembly can be sought by the driver in a very simple manner by aligning the longitudinal center axis of the superstructure with that of the chassis frame or the direction of the driver's cabin with that of the vehicle frame and the boom assembly around the vertical axis when the boom is set upwards of the add-on bracket is pivoted until the work tool lies against the vertical protective wall provided on the side of the loader frame. Damage to the loader frame is effectively avoided by the vertical protective wall. It is not necessary to pivot the boom assembly around the axis of the attachment bracket if the boom remains set in the longitudinal direction of the uppercarriage from the digging work previously carried out. In this case or if the boom is slightly inclined, the storage space provided on the fender is large enough to accommodate most of the usual digging tools.
  • Claim 2 leads to a design in which the common pivot plane of the boom assembly is approximately parallel to the longitudinal center axis of the chassis frame in the rest position. Due to the lateral offset of the vertical swivel axis of the attachment bracket, it is ensured that the work tool always has enough space on the widened shelf, even when the boom is slightly inclined.
  • Claim 3 intends that with respect to the longitudinal center axis of the chassis frame laterally offset lifting frame of the loader can be symmetrically connected to the loading shovel for the purpose of favorable distribution and transmission of forces, and the rocker arm cylinder and the bucket tilt cylinder transfer their supporting forces centrally into the vehicle frame.
  • Claim 4 relates to the design of the cranked frame side of the loading arm designed as a lifting frame. With the help of the bend consisting of simple components, a symmetrical connection of the lifting frame to the loading shovel is possible. If the offset designed for one frame side is also provided on the other side of the frame, this results in a particularly narrow loading frame and a symmetrical connecting end of the lifting frame widened towards the loading shovel.
  • the loader frame is arranged completely to the side next to the longitudinal center axis of the chassis frame, the loading arm consisting of two spars which are mounted at a lateral distance from one another in the loader frame and which are connected at the front end to a transverse tube carrier which is symmetrically connected to the loading shovel.
  • This loader frame which is consistently offset on the cabin side, enables particularly wide storage for the work tools, but requires a stiffened construction of the loading arm.
  • the lifting frame consisting of the above-mentioned spars is replaced by a mono rocker whose front end is widened to one side for the purpose of symmetrical connection to the loading shovel.
  • a driver's cab brought forward in accordance with claim 8 aims to reduce the distance between the steering wheel and the front edge of the bucket and provides an optimal overview during loading work or driving on the road.
  • the relative offset of the extension bracket with respect to the front of the cabin enables the folded boom assembly to be accommodated without impairing the view of the loading shovel.
  • An optionally switchable front or rear wheel steering with switchable all-wheel steering according to claim 9 leads to optimal uses of the work vehicle by turning on the front steering when driving on the road to prevent swerving of the device and damage to other road users, while a charger operation with activated rear steering ensures the best efficiency .
  • the transverse threshold on the front of the shelf according to claim 10 it is achieved that the work tool on the shelf does not have to be clamped or lashed in driving to avoid unintentional movements if the hydraulic cylinders should give way due to leakage during a long journey.
  • the threshold can be replaced by a transverse channel or trough.
  • a backhoe loader is supported on a chassis frame 10 via the base wheels 16 of a front axle 12 and a rear axle 14.
  • the ground wheels 16 of the front and rear axles shown in FIGS. 3 and 4 with the opposite steering angle are intended to indicate that an optionally switchable steering device is provided, with which all-wheel steering for all cramped construction sites, so-called crab steering for extreme driving maneuvers, is best for driving a steering with the wheels of the front axle 12 and for work with the front loader a steering only with the wheels of the rear axle 14 is switched on.
  • a loader frame consisting of vertical support parts 24, between which the rear end of a loader arm 26 is pivotally mounted about a horizontal axis 27.
  • a loader frame consisting of vertical support parts 24, between which the rear end of a loader arm 26 is pivotally mounted about a horizontal axis 27.
  • a loading shovel 38 is rotatable about a horizontal axis 48, which in a known manner by means of a tilting cylinder 42 articulated at 41 on the loading frame and to a rocking arm 40 and by means of a rod 43 extending between the rocking arm 40 and the loading shovel 38 between Unloading positions open at the front or at the bottom, a scraping position according to FIG. 2 and an upwardly open transport position according to FIG. 1 is tilted.
  • a superstructure 54 which can be rotated about a vertical axis 53, for example by means of a slewing ring 52, on the platform 55 of which a counterweight 58, a drive and hydraulic unit 59 and a boom assembly are arranged in addition to a lateral driver's cab 56.
  • the excavator boom 62 has a horizontal pivot axis 80 on a mounting bracket 64 which can be pivoted about a vertical axis 70 by means of connecting straps 66 on lugs 68 starting from the superstructure.
  • the mounting bracket 64 can be pivoted about its axis according to FIGS. 3 and 4 to both sides within a total range of approximately 120 ° or more.
  • the mounting bracket 64 carries a side extension 72 as a connection for a pivot cylinder 74 articulated at the other end of the superstructure.
  • the pivoting range of the mounting bracket indicated by broken lines can also be expanded when a different pivot drive is used.
  • the dimensions of the uppercarriage, undercarriage frame and loading shovel are such that the side limits limit the values prescribed for road travel or do not exceed them.
  • the superstructure In driving and loader operation, the superstructure is set with the front of the cabin facing forward so that the longitudinal center axis of the superstructure and the chassis frame match.
  • the driver's cab 56 Within the enveloping circle H of the superstructure 54, which is determined by the dimensions of the counterweight 58, the driver's cab 56, which is arranged next to the longitudinal center axis, is advanced so that the driver has an unobstructed view of the loading shovel and the road in front of it. To the side of the driver's cab 56, the length of the platform 55 of the superstructure is reduced.
  • the pivot axis 70 of the mounting bracket 64 located in front of this area of the platform is laterally behind the cabin front wall 60, so that there is sufficient space in front of the mounting bracket on the undercarriage frame 10 for the folded working tool 78 in when the boom 62 is raised with the dipper stick 76 folded down to be able to place the rest position shown in FIGS. 1, 3 and 4 laterally outside the unobstructed view from the driver's cab to the loading shovel 38.
  • Front left and right fenders 18 and 20 are fastened to the chassis frame 10 in the direction of travel. 3 and 4 is provided with a shelf 22 which is widened in the direction of the longitudinal center axis of the undercarriage frame and which can consist of a stiffened or supported plate or another suitable stable support.
  • the shelf 22 extends up to the right support 24 of the loader frame in the direction of travel, which is covered on the outside by a vertical protective wall 50 shown hatched in FIG. 2 or forms a structural unit with it and protects the loader frame from damage when the superstructure 54 with the boom assembly or this alone can be pivoted into a rest position shown in FIGS. 3 and 4, in which the working tool is placed on the shelf 22.
  • a vertical protective wall 50 shown hatched in FIG. 2 or forms a structural unit with it and protects the loader frame from damage when the superstructure 54 with the boom assembly or this alone can be pivoted into a rest position shown in FIGS. 3 and 4, in which the working tool is placed on the shelf 22.
  • an elevated threshold 86 is provided, which secures the working tool 78 during driving operation, so that it does not accidentally slide away from the shelf to the front when the locking action of the hydraulic cylinders of the boom assembly decreases due to leakage.
  • the threshold can also be provided on the outside of the shelf.
  • the shelf 22 is widened according to FIG. 3 up to approximately the longitudinal central axis of the undercarriage frame, ie up to the vertical protective wall 50 arranged there, which can form a unit with the vertical support plate 24 of the loader frame.
  • the two support plates 24 of the narrow loading frame arranged asymmetrically on the side of the driver's cab are connected by a rear wall 25 or stiffened against each other.
  • the loader arm 26 mounted in the loader frame consists of tubular or box bars 28a, 30a, the front ends of which are connected to a cross member 32a.
  • the cross member 32a which is extended on one side via the connections, is connected to the loading shovel 38 symmetrically to the longitudinal center axis.
  • the tilt cylinder 52 and the Swing arm lifting cylinders 46 are located according to the top view of FIG. 3 between or above the bars 28a, 30a of the swing arm.
  • the boom does not necessarily have to be adjusted parallel to the longitudinal center axis of the undercarriage frame, as shown, but can also remain on the tray 22 in slight inclined positions to one side or the other with the digging spoon.
  • the loader frame 24 is also displaced in the direction of the cabin side of the undercarriage frame, but the right-hand support 24 in the direction of travel and the e.g. with it a unitary protective plate 50 with respect to the longitudinal center axis on the side of the shelf 22.
  • the tilt cylinder 42 and the rocker arm cylinder 46 are supported in the middle of the chassis frame 10, and consequently the actuating and supporting forces during operation of the loading shovel are absorbed or balanced distributed.
  • the loading arm 26 designed as a lifting frame consists of a left frame side 28 and a right frame side 30, which are interconnected by transverse stiffeners 32.
  • the frame side 30 has an offset, so that the lifting frame extends symmetrically at the front end to the bucket width and is connected symmetrically to the loading bucket 38.
  • a shorter front frame part 34 overlaps in the direction of the rocker arm with the longer rear frame side 30 and is firmly connected to it via one or more gusset plates 36.
  • the pivot axis 70 of the mounting bracket 64 can be located at a somewhat greater lateral distance from the longitudinal center axis of the superstructure than in FIG. 3, and thus in the forward, folded, rest position of the boom assembly wide digging spoons can also be placed on the shelf without protruding beyond the side of the vehicle.
  • the lateral pivotability of the boom or a pivotable attachment bracket increases the possible uses of the mobile excavator, for example for pulling trenches that are offset laterally
  • the advantages resulting from the broadened storage according to the invention can also be achieved in excavator types without the feature of lateral boom pivoting.
  • the two-part shape of the excavator arm can be replaced by other shapes of the boom assembly.

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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)
  • Shovels (AREA)
  • Body Structure For Vehicles (AREA)
  • Steroid Compounds (AREA)

Abstract

An excavator-loader carries on its chassis frame (10) a front loading device with loading bucket (38) and at the end a superstructure (54) which can be rotated through 360 DEG and has a side driver's cab (56) and a pivot mounting, arranged on the other side, for the excavator boom (62). For the speedy change-over of the superstructure (54) with boom subassembly from excavator operation to loading and travelling operation without control operations requiring special attentiveness, the loader frame (24), with regard to the longitudinal centre axis of the chassis frame, is arranged asymmetrically predominantly on the cab side of the chassis frame (10), and a rest (22) for the attachment, which rest (22) is provided on the front mudguard (20), is widened towards the centre of the chassis frame and is also limited by a perpendicular protective wall (50) on the side adjacent to the loader frame. <IMAGE>

Description

Die Erfindung betrifft einen Baggerlader mit einem Fahrwerkrahmen, der am vorderen Ende ein Ladergestell mit Ladeschwinge und Ladeschaufel und am anderen Ende einen um 360° drehbaren Oberwagen aufweist, auf dessen einer Seite eine Fahrerkabine und auf dessen anderer Seite neben der Fahrerkabine die Antriebsaggregate und ein um eine senkrechte Achse schwenkbarer Anbauhalter für einen Ausleger angeordnet sind. Der Ausleger hat in angehobenem Zustand mit angefaltetem Löffelstiel und Arbeitswerkzeug eine für Straßenfahrten nach vorn eingestellte Ruhestellung seitlich außerhalb des Sichtfeldes der Fahrerkabine, wobei ein vor dem Anbauhalter angeordneter vorderer Kotflügel als Ablage für das Arbeitswerkzeug dient.The invention relates to a backhoe loader with a chassis frame, which at the front end has a loader frame with loading arm and loading shovel and at the other end a superstructure which can be rotated through 360 °, on one side a driver's cab and on the other side next to the driver's cab, the drive units and one around a vertical axis pivotable extension bracket for a boom are arranged. The boom in the raised state with the dipper stick folded and the working tool has a rest position set forwards for road travel to the side outside the field of vision of the driver's cab, with a front fender arranged in front of the mounting bracket serving as a storage space for the working tool.

Bei einem aus der DE-OS 39 32 555 bekannten Baggerlader der vorbezeichneten Art ist einem Mobilbagger der entsprechende drehbare Oberwagen mit einem vorn auf dem Fahrwerkrahmen angeordneten konventionellen Ladergerät kombiniert. Beim Baggerbetrieb wird der Oberwagen mit der Auslegerbaugruppe nach hinten verschwenkt, so daß je nach Oberwagen-Drehwinkel in Verlängerung der Längsmittelachse des Fahrwerkrahmens oder dazu seitlich versetzt gegraben werden kann. Darüberhinaus sind auch seitliche Grabarbeiten möglich. Beim Laderbetrieb und bei Straßenfahrten bleibt der Oberwagen mit dem seitlich neben der Fahrerkabine gelagerten Ausleger in die Ruhestellung nach vorn verschwenkt, wobei die Fahrerkabine eine freie Sicht auf die Ladeschaufel ermöglicht, da der angehobene Ausleger und der nach unten angefaltete Löffelstiel seitlich außerhalb des Sichtfeldes verbleiben. Das Arbeitswerkzeug findet auf dem der Fahrerkabine seitlich gegenüberliegenden Kotflügel Platz.In a backhoe loader of the aforementioned type known from DE-OS 39 32 555, a mobile excavator is combined with the corresponding rotatable superstructure with a conventional loading device arranged on the front of the chassis frame. During excavator operation, the superstructure is pivoted backwards with the boom assembly, so that depending on the superstructure's angle of rotation, digging can be carried out in an extension of the longitudinal center axis of the undercarriage frame or offset to the side. Beyond that too side digging possible. During loader operation and when driving on roads, the uppercarriage remains pivoted forward into the rest position with the boom mounted on the side next to the driver's cab, whereby the driver's cab allows a clear view of the loading shovel, since the raised boom and the dipper stick folded down remain to the side outside the field of vision. The work tool is located on the fender on the side opposite the driver's cab.

In der schräg nach vorn verschwenkten Ruhestellung der Auslegerbaugruppe des bekannten Gerätes läßt sich aufgrund der vorgegebenen Fahrzeugbreite nicht vermeiden, daß das Arbeitswerkzeug über die seitlichen Fahrzeugbegrenzungen hinausragt. Da bei Straßenfahrten aus Sicherheitsgründen kein Bauteil über die seitlichen Fahrzeugbegrenzungen hinausragen darf, müssen breitere Arbeitswerkzeuge vom Löffelstiel gelöst und gesondert befördert werden. Dieser notwendige An- und Abbau des Arbeitswerkzeuges ist, selbst wenn er mit Hilfe einer Schnellkupplung durchgeführt wird, umständlich und zeitaufwendig. Außerdem erfordert das Verschwenken der Auslegerbaugruppe in die Ruhestellung besondere Aufmerksamkeit, um mit dem Werkzeug nicht an das Ladergestell anzustoßen, Beschädigungen zu vermeiden und um innerhalb der seitlichen Fahrzeugbegrenzungen zu verbleiben.In the rest position of the boom assembly of the known device, which is pivoted forward obliquely, it cannot be avoided due to the predetermined vehicle width that the working tool protrudes beyond the lateral vehicle limits. Since, for safety reasons, no component may protrude beyond the side of the vehicle when driving on roads, wider work tools must be removed from the dipper arm and transported separately. This necessary attachment and disassembly of the work tool, even if it is carried out with the help of a quick coupling, is cumbersome and time-consuming. In addition, the pivoting of the boom assembly into the rest position requires special attention in order not to hit the loading frame with the tool, to avoid damage and to remain within the lateral vehicle limits.

Der Erfindung liegt die Aufgabe zugrunde, den bekannten Baggerlader dahingehend zu verbessern, daß ein zügiges Neu-Postionieren des Oberwagens einschließlich der Auslegerbaugruppe von Baggerarbeiten für Ladearbeiten oder für Straßenfahrt, ohne Abbau oder Umstecken eines Bagger- oder Laderteils, nur durch einfache Steuerbetätigungen ohne besondere Aufmerksamkeit gewährleistet wird.The invention has for its object to improve the known backhoe loader so that a quick repositioning of the superstructure including the boom assembly of excavation work for loading work or for road travel, without dismantling or repositioning an excavator or loader part, is only guaranteed by simple control operations without special attention.

Die erfindungsgemäße Lösung dieser Aufgabe ist durch folgende Merkmale gekennzeichnet:

  • a) das Ladergestell ist bezüglich der Fahrwerkrahmen-Längsmittelachse asymmetrisch überwiegend auf der Kabinenseite des Fahrwerkrahmens angeordnet;
  • b) die Ablage für das Arbeitswerkzeug auf dem vorderen Kotflügel ist einwärts in Richtung zur Mitte des Fahrwerkrahmens verbreitert;
  • c) die Ablage ist an der dem Ladergestell benachbarten Seite durch eine senkrechte Schutzwand begrenzt, die einen Teil des Ladergestells bilden kann.
Diese Bauform ermöglicht gegenüber dem Stand der Technik dem Fahrzeugführer einen schnellen, unproblematischen Übergang von Baggerarbeiten zu Laderarbeiten bzw. zur Straßenfahrt, ohne daß ein Baggerläufel zunächst abgebaut werden muß oder die Sicht auf den Schaufellader behindert wird. Der aus Oberwagen und Auslegerbaugruppe bestehende Mobilbaggerteil des Arbeitsfahrzeugs enthält die für außermittige Grabarbeiten wichtige Seitenversatzeinrichtung, und die Auslegerbaugruppe bleibt im Ruhezustand bei Ladearbeiten oder Straßenfahrt dennoch auf dem Fahrzeugrahmen ausreichend weit hinten, um die freie Sicht auf die gesamte Breite der Ladeschaufel oder die davor befindliche Straße nicht zu beeinträchtigen.The solution to this problem according to the invention is characterized by the following features:
  • a) the loader frame is arranged asymmetrically with respect to the longitudinal axis of the chassis frame predominantly on the cabin side of the chassis frame;
  • b) the work tool tray on the front fender is widened inwards towards the center of the undercarriage frame;
  • c) the storage is limited on the side adjacent to the loader frame by a vertical protective wall, which can form part of the loader frame.
Compared to the prior art, this design enables the driver of the vehicle to make a quick, unproblematic transition from excavation work to loader work or to road travel without first having to dismantle an excavator barrel or obstruct the view of the shovel loader. The mobile excavator part of the work vehicle, which consists of the uppercarriage and the boom assembly, contains the lateral offset device, which is important for off-center digging work, and the boom assembly remains in the idle state during loading work or driving on the vehicle frame sufficiently far behind to provide a clear view of the entire width of the loading shovel or the road in front of it not to interfere.

Die Ruhestellung der Auslegerbaugruppe kann vom Fahrer in sehr einfacher Weise dadurch aufgesucht werden, daß er die Längsmittelachse des Oberwagens mit derjenigen des Fahrwerkrahmens bzw. die Richtung der Fahrerkabine mit der des Fahrzeugrahmens zur Flucht bringt und die Auslegerbaugruppe bei nach oben eingestelltem Ausleger um die senkrechte Achse des Anbauhalters soweit verschwenkt, bis das Arbeitswerkzeug sich an die seitlich am Ladergestell vorgesehene senkrechte Schutzwand anlegt. Beschädigungen des Ladergestells werden durch die senkrechten Schutzwand wirksam vermieden. Ein Verschwenken der Auslegerbaugruppe um die Achse des Anbauhalters ist nicht notwendig, wenn der Ausleger von den zuvor durchgeführten Grabarbeiten in Längsrichtung des Oberwagens eingestellt bleibt. In diesem Fall oder bei leichter Schrägstellung des Auslegers ist die auf dem Kotflügel vorgesehene Ablage groß genug, um die meisten der üblichen Grabwerkzeuge aufzunehmen.The rest position of the boom assembly can be sought by the driver in a very simple manner by aligning the longitudinal center axis of the superstructure with that of the chassis frame or the direction of the driver's cabin with that of the vehicle frame and the boom assembly around the vertical axis when the boom is set upwards of the add-on bracket is pivoted until the work tool lies against the vertical protective wall provided on the side of the loader frame. Damage to the loader frame is effectively avoided by the vertical protective wall. It is not necessary to pivot the boom assembly around the axis of the attachment bracket if the boom remains set in the longitudinal direction of the uppercarriage from the digging work previously carried out. In this case or if the boom is slightly inclined, the storage space provided on the fender is large enough to accommodate most of the usual digging tools.

Anspruch 2 führt zu einer Bauform, bei der die gemeinsame Schwenkebene der Auslegerbaugruppe sich in der Ruhestellung ungefähr parallel zur Längsmittelachse des Fahrwerkrahmens befindet. Aufgrund des seitlichen Versatzes der senkrechten Schwenkachse des Anbauhalters ist dafür gesorgt, daß das Arbeitswerkzeug in jedem Fall auf der verbreiterten Ablage, auch bei leichten Schrägstellungen des Auslegers ausreichend Platz findet.Claim 2 leads to a design in which the common pivot plane of the boom assembly is approximately parallel to the longitudinal center axis of the chassis frame in the rest position. Due to the lateral offset of the vertical swivel axis of the attachment bracket, it is ensured that the work tool always has enough space on the widened shelf, even when the boom is slightly inclined.

Anspruch 3 beabsichtigt, daß ein bezüglich der Längsmittelachse des Fahrwerkrahmens seitlich versetzter Hubrahmen des Laders zwecks günstiger Kräfteverteilung und -weiterleitung symmetrisch an die Ladeschaufel angeschlossen werden kann und der Schwingenhubzylinder sowie der Schaufelkippzylinder ihre Abstützkräfte mittig in den Fahrzeugrahmen einleiten.Claim 3 intends that with respect to the longitudinal center axis of the chassis frame laterally offset lifting frame of the loader can be symmetrically connected to the loading shovel for the purpose of favorable distribution and transmission of forces, and the rocker arm cylinder and the bucket tilt cylinder transfer their supporting forces centrally into the vehicle frame.

Anspruch 4 bezieht sich auf die Ausgestaltung der gekröpften Rahmenseite der als Hubrahmen ausgeführten Ladeschwinge. Mit Hilfe der aus einfachen Bauteilen bestehenden Abkröpfung ist ein symmetrischer Anschluß des Hubrahmens an der Ladeschaufel möglich. Wenn die für eine Rahmenseite konzipierte Abkröpfung entsprechend Anspruch 5 entgegengesetzt auch auf der anderen Rahmenseite vorgesehen ist, ergibt sich besonders schmales Ladergestell und ein zur Ladeschaufel hin verbreitertes symmetrisches Anschlußende des Hubrahmens.Claim 4 relates to the design of the cranked frame side of the loading arm designed as a lifting frame. With the help of the bend consisting of simple components, a symmetrical connection of the lifting frame to the loading shovel is possible. If the offset designed for one frame side is also provided on the other side of the frame, this results in a particularly narrow loading frame and a symmetrical connecting end of the lifting frame widened towards the loading shovel.

Gemäß Anspruch 6 ist das Ladergestell vollständig seitlich neben der Längsmittelachse des Fahrwerkrahmens angeordnet, wobei die Ladeschwinge aus zwei unter seitlichem Abstand zueinander im Ladergestell gelagerten Holmen besteht, die am vorderen Ende mit einem querverlaufenden, an die Ladeschaufel symmetrisch angeschlossenen Rohrträger verbunden sind. Dies konsequent auf die Kabinenseite versetzte Ladergestell ermöglicht eine besonders breite Ablage für das Arbeitswerkzeug, erfordert jedoch eine versteifte Konstruktion der Ladeschwinge. - Gemäß Anspruch 7 ist bei einem seitlich versetzten Ladergestell der aus vorgenannten Holmen bestehende Hubrahmen durch eine Monoschwinge ersetzt, deren vorderes Ende zwecks symmetrischem Anschluß an die Ladeschaufel nach einer Seite verbreitert ist.According to claim 6, the loader frame is arranged completely to the side next to the longitudinal center axis of the chassis frame, the loading arm consisting of two spars which are mounted at a lateral distance from one another in the loader frame and which are connected at the front end to a transverse tube carrier which is symmetrically connected to the loading shovel. This loader frame, which is consistently offset on the cabin side, enables particularly wide storage for the work tools, but requires a stiffened construction of the loading arm. - According to claim 7, in a laterally offset loader frame, the lifting frame consisting of the above-mentioned spars is replaced by a mono rocker whose front end is widened to one side for the purpose of symmetrical connection to the loading shovel.

Eine gemäß Anspruch 8 vorgezogene Fahrerkabine bezweckt die Verringerung des Abstandes zwischen Lenkrad und Schaufelvorderkante und eine optimale Übersicht während Ladearbeiten oder Straßenfahrt. Der relative Rückversatz des Anbauhalters bezüglich der Kabinenfrontseite ermöglicht die Unterbringung der zusammengefalteten Auslegerbaugruppe, ohne die Sicht auf die Ladeschaufel zu beeinträchtigen.A driver's cab brought forward in accordance with claim 8 aims to reduce the distance between the steering wheel and the front edge of the bucket and provides an optimal overview during loading work or driving on the road. The relative offset of the extension bracket with respect to the front of the cabin enables the folded boom assembly to be accommodated without impairing the view of the loading shovel.

Eine wahlweise umschaltbare Vorderrad- oder Hinterradlenkung mit zuschaltbarer Allradlenkung gemäß Anspruch 9 führt zu optimalen Einsatzmöglichkeiten des Arbeitsfahrzeuges, indem bei Straßenfahrt die Frontlenkung eingeschaltet wird, um ein Ausscheren des Gerätes und Beschädigungen anderer Verkehrsteilnehmer zu verhindern, während ein Laderbetrieb durch eingeschaltete Hecklenkung mit bestem Wirkungsgrad vorsichgeht.An optionally switchable front or rear wheel steering with switchable all-wheel steering according to claim 9 leads to optimal uses of the work vehicle by turning on the front steering when driving on the road to prevent swerving of the device and damage to other road users, while a charger operation with activated rear steering ensures the best efficiency .

Mit der querverlaufenden Schwelle an der Vorderseite der Ablage gemäß Anspruch 10 wird erreicht, daß im Fahrbetrieb das Arbeitswerkzeug auf der Ablage nicht geklemmt oder festgezurrt werden muß, um unbeabsichtigte Bewegungen zu vermeiden, wenn die Hydraulikzylinder bei längerer Fahrt durch Leckage nachgeben sollten. Die Schwelle kann durch eine querverlaufende Rinne oder Mulde ersetzt sein.With the transverse threshold on the front of the shelf according to claim 10 it is achieved that the work tool on the shelf does not have to be clamped or lashed in driving to avoid unintentional movements if the hydraulic cylinders should give way due to leakage during a long journey. The threshold can be replaced by a transverse channel or trough.

Ausführungsbeispiele des Baggerladers nach der Erfindung sind nachfolgend enahnd der Zeichnungen erläutert. Es zeigen

Fig. 1
eine Seitenansicht eines Baggerladers nach der Erfindung im Fahrbetrieb mit in Fahrtrichtung eingestelltem Oberwagen und Auslegerbaugruppe,
Fig. 2
eine Seitenansicht des Baggerladers nach Fig. 1, jedoch im Baggerbetrieb,
Fig. 3
eine Draufsicht auf Fig. 1 und
Fig. 4
eine Draufsicht einer abgeänderten Ausführungsform des Baggerladers ähnlich Fig. 3.
Embodiments of the backhoe loader according to the invention are explained below in the drawings. Show it
Fig. 1
a side view of a backhoe loader according to the invention while driving with the uppercarriage set in the direction of travel and the boom assembly,
Fig. 2
2 shows a side view of the backhoe loader according to FIG. 1, but in excavator operation,
Fig. 3
a plan view of Fig. 1 and
Fig. 4
3 shows a plan view of a modified embodiment of the backhoe loader similar to FIG. 3.

In den gezeigten Beispielen ist ein Baggerlader auf einem Fahrwerkrahmen 10 über die Bodenräder 16 einer Vorderachse 12 und einer Hinterachse 14 abgestützt. Die in Fig. 3 und 4 mit entgegengesetztem Lenkeinschlag dargestellten Bodenräder 16 der Vorderachse und Hinterachse sollen andeuten, daß ein wahlweise umschaltbare Lenkeinrichtung vorgesehen ist, mit der für alle beengten Baustellen eine Allradlenkung, für extreme Fahrmanöver eine sogenannte Hundeganglenkung, für den Fahrbetrieb am besten nur eine Lenkung mit den Rädern der Vorderachse 12 und für Arbeiten mit dem Frontlader eine Lenkung nur mit den Rädern der Hinterachse 14 eingeschaltet wird.In the examples shown, a backhoe loader is supported on a chassis frame 10 via the base wheels 16 of a front axle 12 and a rear axle 14. The ground wheels 16 of the front and rear axles shown in FIGS. 3 and 4 with the opposite steering angle are intended to indicate that an optionally switchable steering device is provided, with which all-wheel steering for all cramped construction sites, so-called crab steering for extreme driving maneuvers, is best for driving a steering with the wheels of the front axle 12 and for work with the front loader a steering only with the wheels of the rear axle 14 is switched on.

Vorn am Fahrwerkrahmen 10 ist ein aus senkrechten Stützteilen 24 bestehendes Ladergestell angeordnet, zwischen denen das rückwärtige Ende einer Ladeschwinge 26 um eine waagerechte Achse 27 schwenkbar gelagert ist. Zwischen dem Ladergestell und der Ladeschwinge 26 ist ein in Fig. 1 und 2 durch seine Achse angedeuteter Schwingenhubzylinder 46 angeschlossen. Am vorderen Ende der Ladeschwinge 26 ist eine Ladeschaufel 38 um eine waagerechte Achse 48 drehbar, die in bekannter Weise mittels eines bei 41 am Ladergestell und an eine Kippschwinge 40 angelenkten Kippzylinders 42 sowie mittels einer sich zwischen Kippschwinge 40 und Ladeschaufel 38 erstreckenden Stange 43 zwischen nach vorn bzw. unten offenen Entladestellungen, einer Schürfstellung gemäß Fig. 2 und einer nach oben offenen Transportstellung gemäß Fig. 1 gekippt wird.At the front of the chassis frame 10 there is a loader frame consisting of vertical support parts 24, between which the rear end of a loader arm 26 is pivotally mounted about a horizontal axis 27. Between the loader frame and the loader arm 26 is one indicated in FIGS. 1 and 2 by its axis Swing arm cylinder 46 connected. At the front end of the loading rocker 26, a loading shovel 38 is rotatable about a horizontal axis 48, which in a known manner by means of a tilting cylinder 42 articulated at 41 on the loading frame and to a rocking arm 40 and by means of a rod 43 extending between the rocking arm 40 and the loading shovel 38 between Unloading positions open at the front or at the bottom, a scraping position according to FIG. 2 and an upwardly open transport position according to FIG. 1 is tilted.

Am Ende des Fahrwerkrahmens 10 ist ein beispielsweise mittels eines Drehkranzes 52 um eine senkrechte Achse 53 drehbarer Oberwagen 54 gelagert, auf dessen Plattform 55 außer einer seitlichen Fahrerkabine 56 ein Gegengewicht 58, eine Antriebs- und Hydraulikeinheit 59 sowie eine Auslegerbaugruppe angeordnet sind.At the end of the undercarriage frame 10 there is a superstructure 54 which can be rotated about a vertical axis 53, for example by means of a slewing ring 52, on the platform 55 of which a counterweight 58, a drive and hydraulic unit 59 and a boom assembly are arranged in addition to a lateral driver's cab 56.

Der Baggerausleger 62 besitzt eine waagerechte Schwenkachse 80 an einem Anbauhalter 64, der mittels Anschlußlaschen 66 an vom Oberwagen ausgehenden Ansätzen 68 um eine senkrechte Achse 70 schwenkbar ist. Der Anbauhalter 64 läßt sich um seine Achse entsprechend Fig. 3 und 4 nach beiden Seiten innerhalb eines Gesamtbereiches von ungefähr 120° oder mehr verschwenken. Zu diesem Zweck trägt der Anbauhalter 64 einen seitlichen Ansatz 72 als Anschluß für einen anderenends am Oberwagen angelenkten Schwenkzylinder 74. Der mit unterbrochenen Linien angedeutete Schwenkbereich des Anbauhalters kann bei Anwendung eines anderen Schwenkantriebes auch erweitert sein.The excavator boom 62 has a horizontal pivot axis 80 on a mounting bracket 64 which can be pivoted about a vertical axis 70 by means of connecting straps 66 on lugs 68 starting from the superstructure. The mounting bracket 64 can be pivoted about its axis according to FIGS. 3 and 4 to both sides within a total range of approximately 120 ° or more. For this purpose, the mounting bracket 64 carries a side extension 72 as a connection for a pivot cylinder 74 articulated at the other end of the superstructure. The pivoting range of the mounting bracket indicated by broken lines can also be expanded when a different pivot drive is used.

Die Abmessungen von Oberwagen, Fahrwerkrahmen und Ladeschaufel sind so getroffen, daß mit ihren Seitenbegrenzungen die für Straßenfahrten vorgeschriebenen Werte ausgenutzt bzw. nicht überschritten werden. Im Fahr- und Laderbetrieb ist der Oberwagen mit der Kabinenfrontseite nach vorn eingestellt, so daß die Längsmittelachse von Oberwagen und Fahrwerkrahmen übereinstimmen. Innerhalb des durch die Abmessungen des Gegengewichtes 58 bestimmten Hüllkreises H des um 360° drehbaren Oberwagens 54 ist die neben der Längsmittelachse angeordnete Fahrerkabine 56 weit vorgezogen, so daß der Fahrer eine unbehinderte Sicht auf die Ladeschaufel und die davor befindliche Straße erhält. Seitlich neben der Fahrerkabine 56 ist die Länge der Plattform 55 des Oberwagens reduziert. Dementsprechend befindet sich die vor diesem Bereich der Plattform angeordnete Schwenkachse 70 des Anbauhalters 64 seitlich hinter der Kabinenfrontwand 60, so daß vor dem Anbauhalter auf dem Fahrwerkrahmen 10 hinreichend Platz verbleibt, um bei angehobenem Ausleger 62 mit nach unten angefaltetem Löffelstiel 76 das angefaltete Arbeitswerkzeug 78 in der in Fig. 1, 3 und 4 eingezeichneten Ruhestellung seitlich außerhalb der freien Sicht von Fahrerkabine zur Ladeschaufel 38 ablegen zu können.The dimensions of the uppercarriage, undercarriage frame and loading shovel are such that the side limits limit the values prescribed for road travel or do not exceed them. In driving and loader operation, the superstructure is set with the front of the cabin facing forward so that the longitudinal center axis of the superstructure and the chassis frame match. Within the enveloping circle H of the superstructure 54, which is determined by the dimensions of the counterweight 58, the driver's cab 56, which is arranged next to the longitudinal center axis, is advanced so that the driver has an unobstructed view of the loading shovel and the road in front of it. To the side of the driver's cab 56, the length of the platform 55 of the superstructure is reduced. Accordingly, the pivot axis 70 of the mounting bracket 64 located in front of this area of the platform is laterally behind the cabin front wall 60, so that there is sufficient space in front of the mounting bracket on the undercarriage frame 10 for the folded working tool 78 in when the boom 62 is raised with the dipper stick 76 folded down to be able to place the rest position shown in FIGS. 1, 3 and 4 laterally outside the unobstructed view from the driver's cab to the loading shovel 38.

Auf dem Fahrwerkrahmen 10 sind in Fahrtrichtung vordere linke und rechte Kotflügel 18 bzw. 20 befestigt. Die Oberseite des Kotflügels 20 ist gemäß Fig. 3 und 4 mit einer in Richtung zur Längsmittelachse des Fahrwerkrahmens verbreiterten Ablage 22 versehen, die aus einer versteiften bzw. abgestützen Platte oder einer anderen geeigneten stabilen Auflage bestehen kann.Front left and right fenders 18 and 20 are fastened to the chassis frame 10 in the direction of travel. 3 and 4 is provided with a shelf 22 which is widened in the direction of the longitudinal center axis of the undercarriage frame and which can consist of a stiffened or supported plate or another suitable stable support.

Die Ablage 22 erstreckt sich bis zu der in Fahrtrichtung rechten Stütze 24 des Ladergestells, die an ihrer Außenseite durch eine in Fig. 2 schraffiert dargestellte senkrechte Schutzwand 50 abgedeckt ist oder mit dieser eine bauliche Einheit bildet und das Ladergestell vor Beschädigungen schützt, wenn der Oberwagen 54 mit der Auslegerbaugruppe oder diese allein in eine in Fig. 3 und 4 eingezeichnete Ruhestellung verschwenkt werden, in der das Arbeitswerkzeug auf die Ablage 22 abgelegt wird. An der Frontseite der Ablage 22 ist eine erhöhte Schwelle 86 vorgesehen, die das Arbeitswerkzeug 78 während des Fahrbetriebes sichert, damit es bei Nachlassen der Verriegelungswirkung der Hydraulikzylinder der Auslegerbaugruppe durch Leckage nicht unbeabsichtigt von der Ablage nach vorn weggleitet. Die Schwelle kann zusätzlich auch an der Außenseite der Ablage vorgesehen sein.The shelf 22 extends up to the right support 24 of the loader frame in the direction of travel, which is covered on the outside by a vertical protective wall 50 shown hatched in FIG. 2 or forms a structural unit with it and protects the loader frame from damage when the superstructure 54 with the boom assembly or this alone can be pivoted into a rest position shown in FIGS. 3 and 4, in which the working tool is placed on the shelf 22. On the front of the shelf 22, an elevated threshold 86 is provided, which secures the working tool 78 during driving operation, so that it does not accidentally slide away from the shelf to the front when the locking action of the hydraulic cylinders of the boom assembly decreases due to leakage. The threshold can also be provided on the outside of the shelf.

Die Ablage 22 ist gemäß Fig. 3 bis etwa zur Längsmittelachse des Fahrwerkrahmens verbreitert, d.h. bis zu der dort angeordneten senkrechten Schutzwand 50, die mit der senkrechten Stützplatte 24 des Ladergestells eine Einheit bilden kann. Die beiden Stützplatten 24 des asymmetrisch auf der Seite der Fahrerkabine angeordneten schmalen Ladergestells sind durch eine Rückwand 25 verbunden bzw. gegeneinander versteift. Die im Ladergestell gelagerte Ladeschwinge 26 besteht aus Rohr- oder Kastenholmen 28a, 30a, deren vordere Enden mit einem Querträger 32a verbunden sind. Der einseitig über die Verbindungen verlängerte Querträger 32a ist symmetrisch zur Längsmittelachse an die Ladeschaufel 38 angeschlossen. Der Kippzylinder 52 und der Schwingenhubzylinder 46 befinden sich entsprechend der Draufsicht von Fig. 3 zwischen bzw. oberhalb der Holme 28a, 30a der Schwinge.The shelf 22 is widened according to FIG. 3 up to approximately the longitudinal central axis of the undercarriage frame, ie up to the vertical protective wall 50 arranged there, which can form a unit with the vertical support plate 24 of the loader frame. The two support plates 24 of the narrow loading frame arranged asymmetrically on the side of the driver's cab are connected by a rear wall 25 or stiffened against each other. The loader arm 26 mounted in the loader frame consists of tubular or box bars 28a, 30a, the front ends of which are connected to a cross member 32a. The cross member 32a, which is extended on one side via the connections, is connected to the loading shovel 38 symmetrically to the longitudinal center axis. The tilt cylinder 52 and the Swing arm lifting cylinders 46 are located according to the top view of FIG. 3 between or above the bars 28a, 30a of the swing arm.

Im Hinblick auf die verhältnismäßig breite Ablage 22 gemäß Fig. 3 fällt es dem Fahrer leicht, beim Umstellen von Baggerbetrieb auf Fahr- oder Laderbetrieb für die Auslegerbaugruppe eine Ruhestellung oberhalb des Fahrwerkrahmens aufzusuchen, in der das Arbeitswerkzeug nicht über die seitlichen Fahrzeugbegrenzungen hervorsteht. Das heißt, daß der Ausleger nicht unbedingt, wie gezeigt, parallel zur Längsmittelachse des Fahrwerkrahmens eingestellt zu werden braucht, sondern auch in leichten Schrägstellungen nach der einen oder anderen Seite mit dem Grablöffel auf der Ablage 22 verbleiben kann.With regard to the relatively wide storage area 22 according to FIG. 3, it is easy for the driver to find a rest position above the chassis frame in the case of the changeover from excavator operation to driving or loader operation, in which the working tool does not protrude beyond the lateral vehicle boundaries. This means that the boom does not necessarily have to be adjusted parallel to the longitudinal center axis of the undercarriage frame, as shown, but can also remain on the tray 22 in slight inclined positions to one side or the other with the digging spoon.

Bei der Ausführungsform nach Fig. 4 ist das Ladergestell 24 zwar ebenfalls in Richtung der Kabinenseite des Fahrwerkrahmens versetzt, jedoch befindet sich die in Fahrtrichtung rechte Stütze 24 und die z.B. mit ihr eine Einheit bildende Schutzplatte 50 bezüglich der Längsmittelachse auf der Seite der Ablage 22. Bei dieser Variante sind der Kippzylinder 42 und der Schwingenhubzylinder 46 in der Mitte des Fahrwerkrahmens 10 abgestützt, und demzufolge die Betätigungs- und Abstützkräfte beim Betrieb der Ladeschaufel symmetrisch aufgenommen bzw. verteilt.In the embodiment according to Fig. 4, the loader frame 24 is also displaced in the direction of the cabin side of the undercarriage frame, but the right-hand support 24 in the direction of travel and the e.g. with it a unitary protective plate 50 with respect to the longitudinal center axis on the side of the shelf 22. In this variant, the tilt cylinder 42 and the rocker arm cylinder 46 are supported in the middle of the chassis frame 10, and consequently the actuating and supporting forces during operation of the loading shovel are absorbed or balanced distributed.

Die als Hubrahmen ausgebildete Ladeschwinge 26 besteht aus einer linken Rahmenseite 28 und aus einer rechten Rahmenseite 30, die durch Querversteifungen 32 miteinander verbunden sind. Die Rahmenseite 30 besitzt eine Abkröpfung, so daß der Hubrahmen am vorderen Ende zur Schaufelbreite symmetrisch erweitert und symmetrisch an die Ladeschaufel 38 angeschlossen ist. Ein kürzeres vorderes Rahmenteil 34 überlappt sich in Richtung der Schwinge mit der längeren rückwärtigen Rahmenseite 30 und ist mit dieser über ein oder mehrere Knotenbleche 36 fest verbunden. Zusätzlich bestehen Verbindungen mit der vorderen Querversteifung 32. Bei dieser Anordnung des Ladergestells kann sich die Schwenkachse 70 des Anbauhalters 64 in einem etwas größeren seitlichen Abstand von der Längsmittelachse des Oberwagens als in Fig. 3 befinden, damit in der nach vorn weisenden zusammengefalteten Ruhestellung der Auslegerbaugruppe auch noch breite Grablöffel auf der Ablage abgelegt werden können, ohne über die seitliche Fahrzeugbegrenzung vorzustehen.The loading arm 26 designed as a lifting frame consists of a left frame side 28 and a right frame side 30, which are interconnected by transverse stiffeners 32. The frame side 30 has an offset, so that the lifting frame extends symmetrically at the front end to the bucket width and is connected symmetrically to the loading bucket 38. A shorter front frame part 34 overlaps in the direction of the rocker arm with the longer rear frame side 30 and is firmly connected to it via one or more gusset plates 36. In addition, there are connections to the front transverse stiffening 32. With this arrangement of the loader frame, the pivot axis 70 of the mounting bracket 64 can be located at a somewhat greater lateral distance from the longitudinal center axis of the superstructure than in FIG. 3, and thus in the forward, folded, rest position of the boom assembly wide digging spoons can also be placed on the shelf without protruding beyond the side of the vehicle.

Obwohl die seitliche Verschwenkbarkeit des Auslegers bzw. eines schwenkbaren Anbauhalters die Einsatzmöglichkeiten des Mobilbaggers beispielsweise zum Ziehen von seitlich versetzt verlaufenden Gräben vergrößert, lassen sich die aus der erfindungsgemäß verbreiterten Ablage ergebenden Vorteile auch bei Baggertypen ohne das Merkmal der seitlichen Auslegerverschwenkung erreichen. Die zweigeteilte Form des Baggerarms kann durch andere Formen der Auslegerbaugruppe ersetzt sein.Although the lateral pivotability of the boom or a pivotable attachment bracket increases the possible uses of the mobile excavator, for example for pulling trenches that are offset laterally, the advantages resulting from the broadened storage according to the invention can also be achieved in excavator types without the feature of lateral boom pivoting. The two-part shape of the excavator arm can be replaced by other shapes of the boom assembly.

Claims (10)

  1. A backhoe-loader with an undercarriage (10) resting on wheels and comprising at its front end a loader structure (24) with a loader arm and a loading bucket (38) and at the other end a superstructure (54) revolving by 360°, a driver cab (56) being mounted to one side of said superstructure and on the other side next to the driver dab there are the power units and a mounting pad (64) pivotable about a vertical shaft for the horizontal pivot shaft (80) of an excavator boom (62), said boom when in the raised state with collapsed dipper arm and implement (78) comprising a forward-pointing rest position above the undercarriage and outside the field of view of the driver cab, a front mudguard (20) present in front of the mounting pad being designed as a rest for the implement (78),
    characterized by the following features:
    a) the loader structure (24) is mounted asymmetrically relatively to the longitudinal center axis of the undercarriage on the cab side of the undercarriage (10),
    b) the rest (22) for the implement (78) on the front mudguard (20) is widened toward the middle of the undercarriage (10),
    c) the rest (22) is bounded at the side next to the loader structure (24) by a vertical protective wall (50) which in particular forms a part of the loader structure.
  2. Backhoe-loader defined in claim 1, characterized in that the vertical pivot shaft (70) of the mounting pad (64) is mounted laterally offset from the longitudinal center axis of the superstructure (54) to such an extent that the plane of rotation of the boom assembly in its rest position is approximately parallel to the longitudinal center axis of the superstructure and undercarriage and in that the implement (78) is supported by the rest.
  3. Backhoe-loader defined in either of claims 1 and 2, characterized in that the loader arm (26) consists of a hoisting frame with mutually braced frame sides (28, 30), the frame side (30) near the rest being angled and hence the hoisting frame being widened toward the loading bucket (38) to which it is hooked up symmetrically, and in that the rocker arm jack (46) and the bucket tipping jack (42) are mounted centrally relative to the width of the loading bucket and the undercarriage.
  4. Backhoe-loader defined in claim 3, characterized in that the angled frame side (30) consists of a shorter front frame part (34) and of a longer, rearward frame part, which frame parts overlap one another laterally in the longitudinal direction and which are joined together by at least one fishplate (36).
  5. Backhoe-loader defined in either of claims 3 and 4, characterized in that, by means of oppositely angled frame sides, the hoisting frame is provided with a narrow hookup end for the loader structure and with a widened hookup end for the loading bucket.
  6. Backhoe-loader defined in either of claims 1 and 2, characterized in that the loader structure (24) is mounted laterally near the longitudinal center axis of the undercarriage (10), in that the loader arm consists of two beams or pipe supports (28a, 30a) resting at a mutual spacing in the loader structure and connected at the front end to a transverse frame part (32a) symmetrically hooked up to the loading bucket (38), and in that the bucket tipping jack (42) when seen in top view is mounted between the two pipe supports (28a, 30a).
  7. Backhoe-loader defined in either of claims 1 and 2, characterized in that the loader arm (26) is a single arm and rests by its rear end in a loader structure (24) mounted laterally next to the longitudinal center axis of the undercarriage, the front end of the single arm being widened on one side to achieve symmetrical hookup to the loading bucket (38).
  8. Backhoe-loader defined in one of the above claims, characterized in that the driver cab (56) is advanced inside the superstructure circle-envelope toward the loader structure (24) and relative to the vertical pivot shaft (70) of the mounting pad (64).
  9. Backhoe-loader defined in one of the above claims, characterized in that the undercarriage (10) comprises a front axle (12) and a rear axle (14) and also a selective all-wheel steering system which can be selectively switched between steering the front wheels for travel, steering the rear wheels in construction, especially loading, and all-wheel steering in space-limited construction sites.
  10. Backhoe-loader defined in one of the above claims, characterized in that the front side of the rest (22) mounted on the mudguard (20) is fitted with a transverse sill (86).
EP92111627A 1991-07-24 1992-07-09 Dredger Expired - Lifetime EP0524490B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4124461A DE4124461A1 (en) 1991-07-24 1991-07-24 EXCAVATOR LOADER
DE4124461 1991-07-24

Publications (2)

Publication Number Publication Date
EP0524490A1 EP0524490A1 (en) 1993-01-27
EP0524490B1 true EP0524490B1 (en) 1994-10-05

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US (1) US5295318A (en)
EP (1) EP0524490B1 (en)
JP (1) JP2564450B2 (en)
KR (1) KR930002618A (en)
AT (1) ATE112600T1 (en)
DE (2) DE4124461A1 (en)
ES (1) ES2061301T3 (en)

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CN114032985A (en) * 2021-11-26 2022-02-11 江苏徐工工程机械研究院有限公司 Loader-digger capable of digging efficiently

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Also Published As

Publication number Publication date
JP2564450B2 (en) 1996-12-18
ES2061301T3 (en) 1994-12-01
US5295318A (en) 1994-03-22
DE59200589D1 (en) 1994-11-10
JPH05202533A (en) 1993-08-10
EP0524490A1 (en) 1993-01-27
KR930002618A (en) 1993-02-23
ATE112600T1 (en) 1994-10-15
DE4124461C2 (en) 1993-08-19
DE4124461A1 (en) 1993-01-28

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