EP1903147B1 - Front loader with mechanical parallel guidance - Google Patents

Front loader with mechanical parallel guidance Download PDF

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Publication number
EP1903147B1
EP1903147B1 EP07018540A EP07018540A EP1903147B1 EP 1903147 B1 EP1903147 B1 EP 1903147B1 EP 07018540 A EP07018540 A EP 07018540A EP 07018540 A EP07018540 A EP 07018540A EP 1903147 B1 EP1903147 B1 EP 1903147B1
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EP
European Patent Office
Prior art keywords
front loader
rod
swivel
linkage
swivel axis
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EP07018540A
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German (de)
French (fr)
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EP1903147A3 (en
EP1903147A2 (en
Inventor
Stefan Strüning
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Wilhelm Stoll Maschinenfabrik GmbH
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Wilhelm Stoll Maschinenfabrik GmbH
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Priority to PL07018540T priority Critical patent/PL1903147T3/en
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Publication of EP1903147A3 publication Critical patent/EP1903147A3/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
    • 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
    • E02F3/3411—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 of the Z-type

Definitions

  • the invention relates to a attachable to a tractor front loader with a mechanical parallel guide for an attachable to the front loader tool and the features of the preamble of claim 1.
  • a mechanical parallel guide in a tractor is used to maintain the current angular position of a mounted on the front loader tool relative to the ground when raising and lowering with the front loader, the swingarms of the front loader are pivoted about a horizontal swing arm pivot relative to the tractor, so that z. B. any good that is taken up with the working tool, not accidentally tilted or spilled.
  • a conventional mechanical parallel guidance of a front loader comprises control rods which extend from the columns mounted on the tractor in a stationary and rotationally fixed manner above the rocker spars to deflection triangles, which are pivotably mounted on the rocker spars in the region of downward pointing kinks of the rocker spars and on which a central or a tool cylinder per rocker spar is supported, which acts on a mounting bracket for the tool.
  • this known mechanical parallel guide is both the space requirement of the control rods above the swingarm spars, the z. B. can collide with a swiveling forward front window of a driver's cab of the tractor to which the front loader is mounted, as well as connected to the control rods obstruction of the driver of the tractor.
  • the control rods do not run above but below the respective rocker spar and engage below the triangular pivot axes about which the Umlenkdreiecke are pivotally mounted on the rocker beams on the Umlenkdreiecken. Accordingly, the Umlenkdreiecke are not strictly triangular but designed as a two-armed lever. These two-armed levers are mounted in recesses of the swingarm spars so that they extend from below the swingarm spars where the control rods are articulated through the swingarm spars to above the swingarm spars where their further pivot point is.
  • the guide rods do not extend from the columns mounted on the tractor to the deflection triangles below the rocker beams, at least one tool cylinder extending from the deflection triangles to the mounting bracket for the tool, but the guide rods and the tool cylinders are opposite the arrangement reversed according to the preamble of claim 1.
  • the driver's view of the tractor above the swingarm spars is kept clear up to their downward pointing creases.
  • a front loader with the features of the preamble of claim 1 is known from DE 101 62 016 A1 known.
  • the control rods extend in a straight line between the two rod pivot axes, and the cross section of the rocker arms is hinged down to receive the control rods. Through this downwardly extended cross-section of the swingarm spars the driver's view of the tractor is significantly reduced.
  • the invention has for its object to provide a front loader with the features of the preamble of claim 1, in which with respect to the visibility of the driver of the tractor to which the front loader is grown no worse conditions prevail than in a front loader without mechanical parallel guide.
  • the new front loader which is described in the claims only in relation to a single rocker spar, but regularly has two rocker spars and correspondingly two control rods, run the control rods in all operating positions of the front loader at least half their length between the rod pivot axes within the cross section of swing bars.
  • the cross section of the swingarms compared to conventional designs significantly expand and without compromising on the functionality of the control rods, on the other hand, when a material history of the control rods to the course of the rocker arms between the rocker pivot axis and the Dreieckschwenkachsen out offset so that the masses of the control rods at least 60% above one of the lie two plane pivot axes defined plane.
  • the new front loader Over the entire length, over which the control rods run within the cross section of the swinging beams, the new front loader is not different from a front loader without mechanical parallel guidance, both in terms of visibility and the space for attaching the lifting cylinder.
  • control rods extend in all operating positions of the front loader at least two thirds of its length between the rod pivot axes within the cross section of the swing arm.
  • the remainder of the control rods which is not within the cross section of the rocker beams, are located near the columns at which the rocker arms are pivotally mounted about the rocker pivot axis.
  • the lifting cylinder of a front loader are typically articulated at a significant distance to the swingarm pivot axis of the columns to create favorable lifting conditions.
  • the swingarms can basically have a U-shaped profile with downwardly directed opening.
  • the control rods extend over their substantial length between the rod pivot axes within an edge-closed cross-section of the rocker beams, i. are completely enclosed by the swinging spars.
  • control rods can also be mounted on the Umlenkdreiecken, said Umlenkdreiecke carry in a front loader according to the invention, although this historically-related name, but are actually two-armed lever.
  • control rods are stored in the new front loader regularly above cylinder pivot axes on the columns to those on the Swinging spars attacking lifting cylinder are pivotally mounted on the columns.
  • the first rod pivot axes are much closer to the pivot axis compared to the columns than to the cylinder pivot axes.
  • the new front loader It is preferred in the new front loader. if the masses of the control rods are at least 75% above the plane defined by the two rod pivot axes, at least where the control rods extend within the rocker beams. Accordingly, it is favorable in the new front loader when the rocker pivot axis is arranged in the upper region of the cross section of the rocker spars, so that the cross section of the rocker spars, through which the control rods extend, is reversed as far as possible down to the control rods.
  • the control rods may be bent down to the first rod pivot axis on the columns, while preferably being bent gently downwardly toward the second pivot axis on the deflection triangles.
  • Another contribution to a particularly slim construction of the swingarms is provided by the fact that the second rod pivot axes at the Umlenkdreiecken are further away from the triangular pivot axes as a horizontal horrerschwenkachse to pivot a tool cylinder for arbitrary pivoting of the tool about a horizontal tool pivot axis relative to the rocker beams is stored the deflection triangle.
  • the front loader 1 In the side view of the front loader 1 according to Fig. 1 its components are all easy to see, though most of them are present twice in the complete front loader 1. Specifically, all components of the front loader 1 described below, except for a mounting bracket 7 for attaching a tool not shown here to the front loader 1 regularly arranged twice in symmetrical arrangement to a lying parallel behind the plane vertical vertical plane of the front loader 1. Accordingly, in the following description of the front loader 1 in the description of all actually doubly occurring components, the plural is used.
  • the front loader 1 is mounted on columns 4 to a tractor, not shown here, the columns 4 in the mounted state of the front loader 1 relative to the tractor are stationary and rotationally fixed.
  • swingarms 2 are mounted pivotably about a horizontally extending swingarm pivot axis 8.
  • lifting cylinders 9 are mounted pivotably about cylinder pivot axes 10 in the lower region of the columns 4, which engage with their other end on the rocker beams 2.
  • the rocker beams 2 have a downwardly directed bend 11, in the area they by gusset plates. 6 are reinforced.
  • the rocker spars 2 extend down to the mounting bracket 7, which is mounted about a tool pivot axis 12 pivotally mounted on the rocker beams 2.
  • tool cylinder 13 are provided to pivot the mounting bracket 7 about the tool pivot axis 12.
  • the tool cylinder 13 engage via four-bar arrangements 14, which in addition to the rocker beams 2 and the mounting bracket 7 each have two additional links 15 and 16, to the mounting bracket 7 at.
  • the tool cylinders 13 are mounted pivotably about tool cylinder pivot axes 17 on deflection triangles 5, on which they are supported during pivoting of the mounting bracket 7.
  • the Umlenkdreiecke 5 are actually two-armed levers which are pivotally mounted about Dreieckschwenkachsen 18 within the rocker beams 2 and attack at the shorter lever arms within the cross section of the rocker beams 2 control rods 3, which are pivotable relative to the Umlenkdreiecken 5 about rod pivot axes 19.
  • the control rods 2 are mounted pivotably about further rod pivot axes 20 on the columns 4, wherein the rod pivot axes 20 are closer to the swing arm pivot axis 8 than to the cylinder pivot axes 10.
  • the control rods 3 engage not only within the closed cross-section of the rocker beams 2 to the Umlenkdreiecken 5, but they extend from there even within the closed cross-section of the rocker beams 2 to openings 21 of the rocker beams 2 near the columns 4.
  • the control rods 2 so about its essential part within the cross section of the swingarms 2 and this is true for all working positions of the front loader 1, ie for all pivot positions of the swingarms 2 about the swingarm pivot axis 8.
  • the rocker pivot axis 8 as well as the triangular pivot axes 18 extends in the upper region of the cross section of the rocker beams 2, and the control rods 3 are bent at their ends to the rod pivot axes 19 at the Umlenkdreiecken 5 and bent to the rod pivot axes 20 on the columns 4 out ,
  • the control rods 2 serve the angular position of the mounting bracket 7 about the tool pivot axis 12, which is selected with the tool cylinders 13, relative to the ground or against the ground rotatable columns 4 when lifting the rocker beams 2 about the swing arm pivot. 8 to conserve. This preservation of the pivot position is referred to as a mechanical parallel guidance for the mounted on the front loader 1 tool.

Abstract

The loader (1) has a mechanical parallel guide comprising a control rod (3) running in all operating positions of the loader for half of the loader length between rod swivel axes (19, 20) within a cross-section of a swinging bar (2). A material distribution of the control rod is offset to a distribution of the swinging bar between a swinging swivel axis (8) and a triangle swivel axis (18) in a backward manner. Mass of the control rod is sixty percentages above a level defined by the rod swivel axes.

Description

Die Erfindung betrifft einen an einen Schlepper anbaubaren Frontlader mit einer mechanischen Parallelführung für ein an den Frontlader anbaubares Werkzeug und den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a attachable to a tractor front loader with a mechanical parallel guide for an attachable to the front loader tool and the features of the preamble of claim 1.

Eine mechanische Parallelführung bei einem Schlepper dient dazu, die aktuelle Winkellage eines an den Frontlader angebauten Werkzeugs gegenüber dem Boden beim Anheben und Absenken mit dem Frontlader, wobei die Schwingenholme des Frontladers um eine horizontale Schwingenschwenkachse gegenüber dem Schlepper verschwenkt werden, beizubehalten, so dass z. B. irgendwelches Gut, das mit dem Arbeitswerkzeug aufgenommen wird, nicht unbeabsichtigt verkippt oder verschüttet wird.A mechanical parallel guide in a tractor is used to maintain the current angular position of a mounted on the front loader tool relative to the ground when raising and lowering with the front loader, the swingarms of the front loader are pivoted about a horizontal swing arm pivot relative to the tractor, so that z. B. any good that is taken up with the working tool, not accidentally tilted or spilled.

STAND DER TECHNIKSTATE OF THE ART

Eine übliche mechanische Parallelführung eines Frontladers umfasst Steuerstangen, die von den orts- und drehfest an den Schlepper angebauten Säulen ausgehend oberhalb der Schwingenholme bis zu Umlenkdreiecken verlaufen, die im Bereich von nach unten zeigenden Knicken der Schwingenholme an den Schwingenholmen verschwenkbar gelagert sind und an denen sich ein zentraler oder ein Werkzeugzylinder je Schwingenholm abstützt, welcher an einer Anbaukonsole für das Werkzeug angreift. Nachteil dieser bekannten mechanischen Parallelführung ist sowohl der Platzbedarf der Steuerstangen oberhalb der Schwingenholme, der z. B. mit einer nach vorne aufschwenkenden Frontscheibe einer Fahrerkabine des Schleppers kollidieren kann, an den der Frontlader angebaut ist, als auch die mit den Steuerstangen verbundene Sichtbehinderung des Fahrers des Schleppers.A conventional mechanical parallel guidance of a front loader comprises control rods which extend from the columns mounted on the tractor in a stationary and rotationally fixed manner above the rocker spars to deflection triangles, which are pivotably mounted on the rocker spars in the region of downward pointing kinks of the rocker spars and on which a central or a tool cylinder per rocker spar is supported, which acts on a mounting bracket for the tool. Disadvantage of this known mechanical parallel guide is both the space requirement of the control rods above the swingarm spars, the z. B. can collide with a swiveling forward front window of a driver's cab of the tractor to which the front loader is mounted, as well as connected to the control rods obstruction of the driver of the tractor.

Um diesen geschilderten Nachteilen zu begegnen, wird in der DE 82 07 930 U1 ein an einen Schlepper anbaubarer Frontlader mit einer mechanischen Parallelführung für ein an den Frontlader anbaubares Werkzeug beschrieben, der zwei Säulen zum orts- und drehfesten Anbauen an den Schlepper, je einen um eine horizontale Schwingenschwenkachse verschwenkbar an jeder Säule gelagerten Schwingenholm, je ein im Bereich eines nach unten zeigenden Knicks jedes Schwingenholms um eine horizontale Dreieckschwenkachse in dem Schwingenholm gelagertes Umlenkdreieck, und je eine unterhalb der Schwingenschwenkachse um eine erste horizontale Stangenschwenkachse verschwenkbar an der Säule und unterhalb der Dreieckschwenkachse um eine zweite horizontale Stangenschwenkachse verschwenkbar an dem Umlenkdreieck gelagerte Steuerstange aufweist. D. h. die Steuerstangen verlaufen nicht oberhalb sondern unterhalb des jeweiligen Schwingenholms und greifen auch unterhalb von Dreieckschwenkachsen, um die die Umlenkdreiecke verschwenkbar an den Schwingenholmen gelagert sind, an den Umlenkdreiecken an. Entsprechend sind die Umlenkdreiecke nicht streng genommen dreieckig sondern als zweiarmige Hebel ausgebildet. Diese zweiarmigen Hebel sind in Aussparungen der Schwingenholme gelagert, so dass sie sich von unterhalb der Schwingenholme, wo die Steuerstangen angelenkt sind durch die Schwingenholme bis oberhalb der Schwingenholme, wo ihr weiterer Anlenkungspunkt ist, erstrecken. Bei dem bekannten Frontlader verlaufen streng genommen nicht die Führungsstangen von den an den Schlepper angebauten Säulen zu den Umlenkdreiecken unterhalb der Schwingenholme, wobei sich von den Umlenkdreiecken zu der Anbaukonsole für das Werkzeug mindestens ein Werkzeugzylinder erstreckt, sondern die Führungsstangen und die Werkzeugzylinder sind gegenüber der Anordnung gemäß dem Oberbegriff des Patentanspruchs 1 vertauscht. Bei dem bekannten Frontlader wird die Sicht des Fahrers des Schleppers oberhalb der Schwingenholme bis zu deren nach unten zeigenden Knicken zwar freigehalten. Bei angehobenem Frontlader behindern die unterhalb der Schwingenholme verlaufenden Werkzeugzylinder die Sicht aber doch ganz beträchtlich, zumal Hubzylinder für das Anheben des Frontladers sehr tief an den Säulen und den Schwingenholm angesetzt sein müssen, um den notwendigen Platz für die Werkzeugzylinder zwischen ihnen und den Schwingenholmen zu belassen.In order to counter these described disadvantages, is in the DE 82 07 930 U1 a attachable to a tractor front loader with a mechanical parallel guide for a attachable to the front loader tool described, the two columns for stationary and rotationally fixed attachments to the tractor, one about a horizontal swing arm pivotally mounted on each pillar swingarm, one in each area downwardly facing Knicks each rocker arm about a horizontal triangular pivot axis in the rocker spar mounted deflection triangle, and one below the rocker pivot about a first horizontal rod pivot axis pivotally mounted on the column and below the triangular pivot about a second horizontal rod pivot axis pivotally mounted on the Umlenkdreieck control rod. Ie. the control rods do not run above but below the respective rocker spar and engage below the triangular pivot axes about which the Umlenkdreiecke are pivotally mounted on the rocker beams on the Umlenkdreiecken. Accordingly, the Umlenkdreiecke are not strictly triangular but designed as a two-armed lever. These two-armed levers are mounted in recesses of the swingarm spars so that they extend from below the swingarm spars where the control rods are articulated through the swingarm spars to above the swingarm spars where their further pivot point is. In the known front loader, strictly speaking, the guide rods do not extend from the columns mounted on the tractor to the deflection triangles below the rocker beams, at least one tool cylinder extending from the deflection triangles to the mounting bracket for the tool, but the guide rods and the tool cylinders are opposite the arrangement reversed according to the preamble of claim 1. In the known front loader, the driver's view of the tractor above the swingarm spars is kept clear up to their downward pointing creases. When the front loader is raised, the tool cylinders running underneath the swingarms obstruct the view quite a bit, especially for lifting cylinders the lifting of the front loader must be very deeply attached to the columns and the swingarm spar to leave the necessary space for the tool cylinders between them and the swingarm bars.

Ein Frontlader mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 ist aus der DE 101 62 016 A1 bekannt. Hier verlaufen die Steuerstangen geradlinig zwischen den beiden Stangenschwenkachsen, und der Querschnitt der Schwingenholme ist nach unten aufgewietet, um die Steuerstangen aufzunehmen. Durch diesen nach unten erweiterten Querschnitt der Schwingenholme wird die Sicht des Fahrers des Schleppers deutlich eingeschränkt.A front loader with the features of the preamble of claim 1 is known from DE 101 62 016 A1 known. Here, the control rods extend in a straight line between the two rod pivot axes, and the cross section of the rocker arms is hinged down to receive the control rods. Through this downwardly extended cross-section of the swingarm spars the driver's view of the tractor is significantly reduced.

US 3,203,564 A zeigt einen weiteren gattungsgemäßen Frontlader. US 3,203,564 A shows a further generic front loader.

AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

Der Erfindung liegt die Aufgabe zugrunde, einen Frontlader mit den Merkmalen des Oberbegriffs des Patentanspruchs 1 aufzuzeigen, bei dem in Bezug auf die Sichtverhältnisse des Fahrers des Schleppers, an den der Frontlader angebaut ist keine schlechteren Verhältnisse herrschen als bei einem Frontlader ohne mechanische Parallelführung.The invention has for its object to provide a front loader with the features of the preamble of claim 1, in which with respect to the visibility of the driver of the tractor to which the front loader is grown no worse conditions prevail than in a front loader without mechanical parallel guide.

LÖSUNGSOLUTION

Die Aufgabe der Erfindung wird erfindungsgemäß durch einen Frontlader mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausführungsformen des neuen Frontladers sind in den abhängigen Patentansprüchen 2 bis 10 definiert.The object of the invention is achieved by a front loader with the features of claim 1. Advantageous embodiments of the new front loader are defined in the dependent claims 2 to 10.

BESCHREIBUNG DER ERFINDUNGDESCRIPTION OF THE INVENTION

Bei dem neuen Frontlader, der in den Patentansprüchen nur in Bezug auf einen einzigen Schwingenholm beschrieben ist, aber regelmäßig zwei Schwingenholme und entsprechend auch zwei Steuerstangen aufweist, verlaufen die Steuerstangen in allen Betriebsstellungen des Frontladers mindestens zur Hälfte ihrer Länge zwischen den Stangenschwenkachsen innerhalb des Querschnitts der Schwingenholme. Dies ist überraschenderweise möglich, ohne einerseits den Querschnitt der Schwingenholme gegenüber üblichen Konstruktionen signifikant aufzuweiten und ohne andererseits Kompromisse in Bezug auf die Funktionalität der Steuerstangen einzugehen, wenn ein Materialverlauf der Steuerstangen zu dem Verlauf der Schwingenholme zwischen der Schwingenschwenkachse und den Dreieckschwenkachsen hin so nach oben versetzt ist, dass die Massen der Steuerstangen zu mindestens 60 % oberhalb einer durch die beiden Stangenschwenkachsen definierten Ebene liegen. Über die gesamte Länge, über die die Steuerstangen innerhalb des Querschnitts der Schwingeholme verlaufen, unterscheidet sich der neue Frontlader nicht von einem Frontlader ohne mechanische Parallelführung, und zwar sowohl was die Sichtverhältnisse als auch den Freiraum für das Anbringen der Hubzylinder anbelangt.In the new front loader, which is described in the claims only in relation to a single rocker spar, but regularly has two rocker spars and correspondingly two control rods, run the control rods in all operating positions of the front loader at least half their length between the rod pivot axes within the cross section of swing bars. This is surprisingly possible, without the one hand, the cross section of the swingarms compared to conventional designs significantly expand and without compromising on the functionality of the control rods, on the other hand, when a material history of the control rods to the course of the rocker arms between the rocker pivot axis and the Dreieckschwenkachsen out offset so that the masses of the control rods at least 60% above one of the lie two plane pivot axes defined plane. Over the entire length, over which the control rods run within the cross section of the swinging beams, the new front loader is not different from a front loader without mechanical parallel guidance, both in terms of visibility and the space for attaching the lifting cylinder.

Besonders bevorzugt ist es daher, wenn die Steuerstangen in allen Betriebsstellungen des Frontladers mindestens zu zwei Dritteln ihrer Länge zwischen den Stangenschwenkachsen innerhalb des Querschnitts des Schwingenholms verlaufen. Typischerweise ist der verbleibende Rest der Steuerstangen, der sich nicht innerhalb des Querschnitts der Schwingenholme befindet, nahe den Säulen angeordnet, an denen die Schwingenholme um die Schwingenschwenkachse verschwenkbar gelagert sind. Hier ist sowieso ein ausreichender Freiraum vorhanden, weil die Hubzylinder eines Frontladers typischerweise mit deutlichem Abstand zu der Schwingenschwenkachse an den Säulen angelenkt sind, um günstige Hebeverhältnisse zu schaffen.It is therefore particularly preferred if the control rods extend in all operating positions of the front loader at least two thirds of its length between the rod pivot axes within the cross section of the swing arm. Typically, the remainder of the control rods, which is not within the cross section of the rocker beams, are located near the columns at which the rocker arms are pivotally mounted about the rocker pivot axis. Here is sufficient free space anyway, because the lifting cylinder of a front loader are typically articulated at a significant distance to the swingarm pivot axis of the columns to create favorable lifting conditions.

Um die Steuerstangen über deren wesentliche Länge innerhalb ihres Querschnitts aufzunehmen, können die Schwingenholme grundsätzlich ein U-förmiges Profil mit nach unten gerichteter Öffnung aufweisen. Bevorzugt ist es jedoch bei dem neuen Frontlader, wenn die Steuerstangen über ihre wesentliche Länge zwischen den Stangenschwenkachsen innerhalb eines randgeschlossenen Querschnitts der Schwingenholme verlaufen, d.h. vollständig von den Schwingenholmen umschlossen sind.In order to accommodate the control rods over their essential length within their cross-section, the swingarms can basically have a U-shaped profile with downwardly directed opening. However, it is preferred in the new front loader, when the control rods extend over their substantial length between the rod pivot axes within an edge-closed cross-section of the rocker beams, i. are completely enclosed by the swinging spars.

Innerhalb dieses randgeschlossenen Querschnitts der Schwingenholme können die Steuerstangen auch an den Umlenkdreiecken gelagert sein, wobei diese Umlenkdreiecke bei einem erfindungsgemäßen Frontlader zwar diese historisch bedingte Bezeichnung tragen, aber doch tatsächlich zweiarmige Hebel sind.Within this edge-closed cross-section of the rocker beams, the control rods can also be mounted on the Umlenkdreiecken, said Umlenkdreiecke carry in a front loader according to the invention, although this historically-related name, but are actually two-armed lever.

Wie bereits indirekt angedeutet wurde, sind die Steuerstangen bei dem neuen Frontlader regelmäßig oberhalb von Zylinderschwenkachsen an den Säulen gelagert, um die die an den Schwingenholmen angreifenden Hubzylinder verschwenkbar an den Säulen gelagert sind. Dabei liegen die ersten Stangenschwenkachsen gegenüber den Säulen viel näher an der Schwingenschwenkachse als an den Zylinderschwenkachsen.As has already been indicated indirectly, the control rods are stored in the new front loader regularly above cylinder pivot axes on the columns to those on the Swinging spars attacking lifting cylinder are pivotally mounted on the columns. In this case, the first rod pivot axes are much closer to the pivot axis compared to the columns than to the cylinder pivot axes.

Bevorzugt ist es bei dem neuen Frontlader. wenn die Massen der Steuerstangen zumindest dort, wo die Steuerstangen innerhalb der Schwingenholme verlaufen, zu mindestens 75 % oberhalb der durch die beiden Stangenschwenkachsen definierten Ebene liegen. Entsprechend ist es bei dem neuen Frontlader günstig, wenn die Schwingenschwenkachse im oberen Bereich des Querschnitts der Schwingenholme angeordnet ist, so dass der Querschnitt der Schwingenholme, durch den hindurch sich die Steuerstangen erstrecken, umgekehrt möglichst weit nach unten zu den Steuerstangen verlagert ist.It is preferred in the new front loader. if the masses of the control rods are at least 75% above the plane defined by the two rod pivot axes, at least where the control rods extend within the rocker beams. Accordingly, it is favorable in the new front loader when the rocker pivot axis is arranged in the upper region of the cross section of the rocker spars, so that the cross section of the rocker spars, through which the control rods extend, is reversed as far as possible down to the control rods.

Konkret können die Steuerstangen bei dem neuen Frontlader zu der ersten Stangenschwenkachse an den Säulen hin nach unten abgekröpft sein, während sie zu der zweiten Schwenkachse an den Umlenkdreiecken hin vorzugsweise sanft nach unten umgebogen sind. Ein weiterer Beitrag zu einem besonders schlanken Aufbau der Schwingenholme wird dadurch geliefert, dass die zweiten Stangenschwenkachsen an den Umlenkdreiecken weiter von den Dreieckschwenkachsen entfernt sind als eine horizontale Werkzeugzylinderschwenkachse, um die ein Werkzeugzylinder zum willkürlichen Verschwenken des Werkzeugs um eine horizontale Werkzeugschwenkachse gegenüber dem Schwingenholmen verschwenkbar an dem Umlenkdreieck gelagert ist. An dieser Stelle kann noch einmal betont werden, dass bei dem neuen Frontlader tatsächlich die Steuerstangen zwischen den Säulen und den Umlenkdreiecken verlaufen, während sich der oder die Werkzeugzylinder von den Umlenkdreiecken aus nach vorne erstrecken und kein Platztausch zwischen Steuerstangen und den Werkzeugzylindern vorgesehen ist, weil diese nur mit einem um ein vielfaches größeren Aufwand innerhalb des Querschnitts der Schwingen holme zu führen oder gar abzukröpfen und umzubiegen wären.Specifically, in the new front loader, the control rods may be bent down to the first rod pivot axis on the columns, while preferably being bent gently downwardly toward the second pivot axis on the deflection triangles. Another contribution to a particularly slim construction of the swingarms is provided by the fact that the second rod pivot axes at the Umlenkdreiecken are further away from the triangular pivot axes as a horizontal Werkzeugzylinderschwenkachse to pivot a tool cylinder for arbitrary pivoting of the tool about a horizontal tool pivot axis relative to the rocker beams is stored the deflection triangle. At this point, it can be emphasized once again that with the new front loader, the control rods are actually between the columns and the diverting triangles, while the tool cylinder or cylinders extend forward from the diverting triangles and no space is exchanged between the control rods and the tool cylinders, because This would only lead to a much greater effort within the cross section of the swingarms spars or even crank off and umzubiegen.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den abhängigen Patentansprüchen und der gesamten Beschreibung. Weitere Merkmale sind den Zeichnungen - insbesondere den dargestellten Geometrien und den relativen Abmessungen mehrerer Bauteile zueinander sowie deren relativer Anordnung und Wirkverbindung - zu entnehmen. Die Kombination von Merkmalen unterschiedlicher Ausführungsformen der Erfindung oder von Merkmalen unterschiedlicher Patentansprüche abweichend von den gewählten Rückbeziehungen ist ebenfalls möglich und wird hiermit angeregt. Dies betrifft auch solche Merkmale, die in separaten Zeichnungsfiguren dargestellt sind oder bei deren Beschreibung genannt werden. Diese Merkmale können auch mit Merkmalen unterschiedlicher Patentansprüche kombiniert werden.Advantageous developments of the invention will become apparent from the dependent claims and the entire description. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims differing from the chosen relationships is also possible and is hereby stimulated. This also applies to those features which are shown in separate drawing figures or are mentioned in their description. These features can also be combined with features of different claims.

KURZBESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Im Folgenden wird die Erfindung anhand eines konkreten Ausführungsbeispiels näher erläutert und beschrieben.

Fig. 1
zeigt den neuen Frontlader in einer Seitenansicht, wobei auch der anteilige Verlauf einer Steuerstange und die anteilige Lage eines Umlenkdreiecks innerhalb des dem Betrachter zugekehrten Schwingenholms wiedergegeben sind.
In the following the invention will be explained and described in more detail with reference to a concrete embodiment.
Fig. 1
shows the new front loader in a side view, whereby the proportionate course of a control rod and the proportionate position of a Umlenkdreiecks within the viewer facing the swing arm are shown.

FIGURENBESCHREIBUNGDESCRIPTION OF THE FIGURES

In der Seitenansicht des Frontladers 1 gemäß Fig. 1 sind dessen Bestandteile sämtlich nur einfach zu sehen, obwohl die meisten von ihnen bei dem vollständigen Frontlader 1 zweimal vorhanden sind. Konkret sind sämtliche im Folgenden beschriebenen Bestandteile des Frontladers 1, bis auf eine Anbaukonsole 7 zum Anbauen eines hier nicht dargestellten Werkzeugs an den Frontlader 1 regelmäßig doppelt in symmetrischer Anordnung zu einer parallel hinter der Zeichenebene liegenden Vertikallängsebene der Frontladers 1 angeordnet. Entsprechend wird im Folgenden bei der Beschreibung des Frontladers 1 bei der Beschreibung aller tatsächlich doppelt vorkommenden Bauteile der Plural verwendet.In the side view of the front loader 1 according to Fig. 1 its components are all easy to see, though most of them are present twice in the complete front loader 1. Specifically, all components of the front loader 1 described below, except for a mounting bracket 7 for attaching a tool not shown here to the front loader 1 regularly arranged twice in symmetrical arrangement to a lying parallel behind the plane vertical vertical plane of the front loader 1. Accordingly, in the following description of the front loader 1 in the description of all actually doubly occurring components, the plural is used.

Der Frontlader 1 wird über Säulen 4 an einen hier nicht dargestellten Schlepper angebaut, wobei die Säulen 4 in den angebauten Zustand des Frontladers 1 gegenüber dem Schlepper orts- und drehfest sind. Im oberen Bereich der Säulen 4 sind Schwingenholme 2 um eine horizontal verlaufende Schwingenschwenkachse 8 verschwenkbar gelagert. Zum Verschwenken der Schwingenholme 2 um die Schwingenschwenkachse 8 sind im unteren Bereich der Säulen 4 Hubzylinder 9 um Zylinderschwenkachsen 10 verschwenkbar gelagert, die mit ihrem anderen Ende an den Schwingenholmen 2 angreifen. Die Schwingenholme 2 weisen einen nach unten gerichteten Knick 11 auf, in dessen Bereich sie durch Knotenbleche 6 verstärkt sind. Von dem Knick 11 aus erstrecken sich die Schwingenholme 2 abwärts zu der Anbaukonsole 7, die um eine Werkzeugschwenkachse 12 verschwenkbar an den Schwingenholmen 2 gelagert ist. Um die Anbaukonsole 7 um die Werkzeugschwenkachse 12 zu verschwenken, sind Werkzeugzylinder 13 vorgesehen. Die Werkzeugzylinder 13 greifen über Viergelenkanordnungen 14, die neben den Schwingenholmen 2 und der Anbaukonsole 7 jeweils zwei zusätzliche Lenker 15 und 16 aufweisen, an der Anbaukonsole 7 an. Rückwärtig sind die Werkzeugzylinder 13 um Werkzeugzylinderschwenkachsen 17 verschwenkbar an Umlenkdreiecken 5 gelagert, an denen sie sich beim Verschwenken der Anbaukonsole 7 abstützen. Die Umlenkdreiecke 5 sind tatsächlich zweiarmige Hebel, die um Dreieckschwenkachsen 18 verschwenkbar innerhalb der Schwingenholme 2 gelagert sind und an deren kürzeren Hebelarmen innerhalb des Querschnitts der Schwingenholme 2 Steuerstangen 3 angreifen, die gegenüber den Umlenkdreiecken 5 um Stangenschwenkachsen 19 verschwenkbar sind. An ihrem anderen Ende sind die Steuerstangen 2 um weitere Stangenschwenkachsen 20 verschwenkbar an den Säulen 4 gelagert, wobei die Stangenschwenkachsen 20 näher an der Schwingenschwenkachse 8 als an den Zylinderschwenkachsen 10 liegen. Die Steuerstangen 3 greifen nicht nur innerhalb des geschlossenen Querschnitts der Schwingenholme 2 an den Umlenkdreiecken 5 an, sondern sie erstrecken sich von dort auch innerhalb des geschlossenen Querschnitts der Schwingenholme 2 bis zu Öffnungen 21 der Schwingenholme 2 nahe der Säulen 4. Die Steuerstangen 2 verlaufen so über ihren wesentlichen Teil innerhalb des Querschnitts der Schwingenholme 2 und dies gilt für alle Arbeitsstellungen des Frontladers 1, d. h. für alle Schwenkstellungen der Schwingenholme 2 um die Schwingenschwenkachse 8. Um die Steuerstangen 3 innerhalb des geschlossenen Querschnitts der Schwingenholme 2 führen zu können, ohne diesen Querschnitt aufweiten zu müssen, ist der Querschnitt der Schwingenholme 2 und das Material der Steuerstangen 3 im Vergleich zu der Erstreckung der Schwingenholme 2 zwischen der Schwingenschwenkachse 8 und den Dreieckschwenkachsen 18 bzw. der Steuerstangen 3 zwischen den Stangenschwenkachsen 19 und 20 aufeinander zu versetzt. Zu diesem Zweck verläuft die Schwingenschwenkachse 8 ebenso wie die Dreieckschwenkachsen 18 im oberen Bereich des Querschnitts der Schwingenholme 2, und die Steuerstangen 3 sind an ihren Enden zu den Stangenschwenkachsen 19 an den Umlenkdreiecken 5 hin umgebogen sowie zu den Stangenschwenkachsen 20 an den Säulen 4 hin abgekröpft. Die Steuerstangen 2 dienen dazu, die Winkelstellung der Anbaukonsole 7 um die Werkzeugschwenkachse 12, die mit den Werkzeugzylindern 13 wählbar ist, gegenüber dem Boden bzw. den gegenüber dem Boden drehfesten Säulen 4 beim Anheben der Schwingenholme 2 um die Schwingenschwenkachse 8 zu konservieren. Diese Konservierung der Schwenkstellung wird als mechanische Parallelführung für das an den Frontlader 1 angebaute Werkzeug bezeichnet.The front loader 1 is mounted on columns 4 to a tractor, not shown here, the columns 4 in the mounted state of the front loader 1 relative to the tractor are stationary and rotationally fixed. In the upper region of the columns 4 swingarms 2 are mounted pivotably about a horizontally extending swingarm pivot axis 8. For pivoting the rocker beams 2 about the swing arm pivot axis 8 lifting cylinders 9 are mounted pivotably about cylinder pivot axes 10 in the lower region of the columns 4, which engage with their other end on the rocker beams 2. The rocker beams 2 have a downwardly directed bend 11, in the area they by gusset plates. 6 are reinforced. From the bend 11, the rocker spars 2 extend down to the mounting bracket 7, which is mounted about a tool pivot axis 12 pivotally mounted on the rocker beams 2. To pivot the mounting bracket 7 about the tool pivot axis 12, tool cylinder 13 are provided. The tool cylinder 13 engage via four-bar arrangements 14, which in addition to the rocker beams 2 and the mounting bracket 7 each have two additional links 15 and 16, to the mounting bracket 7 at. At the rear, the tool cylinders 13 are mounted pivotably about tool cylinder pivot axes 17 on deflection triangles 5, on which they are supported during pivoting of the mounting bracket 7. The Umlenkdreiecke 5 are actually two-armed levers which are pivotally mounted about Dreieckschwenkachsen 18 within the rocker beams 2 and attack at the shorter lever arms within the cross section of the rocker beams 2 control rods 3, which are pivotable relative to the Umlenkdreiecken 5 about rod pivot axes 19. At its other end, the control rods 2 are mounted pivotably about further rod pivot axes 20 on the columns 4, wherein the rod pivot axes 20 are closer to the swing arm pivot axis 8 than to the cylinder pivot axes 10. The control rods 3 engage not only within the closed cross-section of the rocker beams 2 to the Umlenkdreiecken 5, but they extend from there even within the closed cross-section of the rocker beams 2 to openings 21 of the rocker beams 2 near the columns 4. The control rods 2 so about its essential part within the cross section of the swingarms 2 and this is true for all working positions of the front loader 1, ie for all pivot positions of the swingarms 2 about the swingarm pivot axis 8. In order to guide the control rods 3 within the closed cross section of the swingarms 2, without this cross section To widen, the cross section of the rocker beams 2 and the material of the control rods 3 compared to the extension of the rocker beams 2 between the rocker pivot axis 8 and the triangular pivot axes 18 and the control rods 3 between the rod pivot axes 19 and 20 offset to each other. For this purpose, the rocker pivot axis 8 as well as the triangular pivot axes 18 extends in the upper region of the cross section of the rocker beams 2, and the control rods 3 are bent at their ends to the rod pivot axes 19 at the Umlenkdreiecken 5 and bent to the rod pivot axes 20 on the columns 4 out , The control rods 2 serve the angular position of the mounting bracket 7 about the tool pivot axis 12, which is selected with the tool cylinders 13, relative to the ground or against the ground rotatable columns 4 when lifting the rocker beams 2 about the swing arm pivot. 8 to conserve. This preservation of the pivot position is referred to as a mechanical parallel guidance for the mounted on the front loader 1 tool.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11 FrontladerFront loaders 1111 Knickkink 22 Schwingenholmswing Holm 1212 WerkzeugschwenkachseTool pivot axis 33 Steuerstangecontrol rod 1313 Werkzeugzylindertool cylinder 44 Säulepillar 1414 ViergelenkanordnungFour-bar arrangement 55 Umlenkdreieckdeviation triangle 1515 Lenkerhandlebars 66 Knotenblechgusset plate 1616 Lenkerhandlebars 77 AnbaukonsoleAnbaukonsole 1717 WerkzeugzylinderschwenkachseTool cylinder pivot axis 88th SchwingenschwenkachseSwing pivot axis 1818 DreieckschwenkachseTriangle swivel axis 99 ZylinderschwenkachseCylinder pivot axis 1919 StangenschwenkachseRod swivel axis 1010 Hubzylinderlifting cylinder 2020 StangenschwenkachseRod swivel axis 2121 Öffnungopening

Claims (10)

  1. Front loader attachable to a tractor and having a mechanical parallel guidance for a tool attachable to the front loader, the front loader (1) comprising:
    - at least one column (4) to be attached to the tractor in a stationary and torque proof way,
    - a linkage boom (2) swivel-mounted to the column (4) about a horizontal linkage swivel axis (8),
    - a diverting triangle (5) mounted about a horizontal triangle swivel axis (18) within the linkage boom (2) in the area of a downwardly pointing bend of the linkage boom (2), and
    - a guiding rod (3) which is swivel-mounted to the column (4) about a first horizontal rod swivel-axis (20) beneath the linkage swivel axis (8) and to the diverting triangle (5) about a second horizontal rod swivel axis (19) beneath the triangle swivel-axis (18), and which runs within the cross section of the linkage boom (2) over at least one half of its length between the rod swivel axes (19, 20) in all operation positions of the front loader (1),
    characterized in that a distribution of material of the guiding rod (3) is offset in upward direction with regard to the course of the linkage boom (2) between the linkage swivel axis (8) and the triangle swivel axis (18) in such a way that at least 60 % of the mass of the guiding rod (3) are located above a plane defined by both rod guiding axes (19, 20).
  2. Front loader according to claim 1, characterized in that the guiding rod (3) runs within the cross section of the linkage boom (2) over at least two thirds of its length between the rod swivel axes (19, 20) in all operation positions of the front loader (1).
  3. Front loader according to claim 1 or 2, characterized in that the guiding rod (3) runs within a boundary-closed cross section of the linkage boom (2) over at least one half or two thirds of its length between the rod swivel axes (19, 20) in all operation positions of the front loader (1).
  4. Front loader according to claim 3, characterized in that the guiding rod (3) is mounted to the diverting triangle (5) within the boundary-closed cross section of the linkage boom (2).
  5. Front loader according to any of the claims 1 to 4, characterized in that the guiding rod (3) is mounted to the column (4) above a cylinder swivel axis (10) about which a lifting cylinder (9) engaging the linkage boom (2) is swivel-mounted to the column (4).
  6. Front loader according to claim 5, characterized in that the first rod swivel axis (20) is closer to the linkage swivel axis (8) than to the cylinder swivel axis (10).
  7. Front loader according to any of the claims 1 to 6, characterised in that at least 75 % of the mass of the guiding rod (3) are located above the plane defined by both rod swivel axes (19, 20).
  8. Front loader according to any of the claims 1 to 7, characterized in that the linkage swivel axis (8) is arranged in the upper area of the cross section of the linkage boom (2) so that the cross section of the linkage boom (8) through which the guiding rod (3) extends is offset in downward direction.
  9. Front loader according to any of the claims 1 to 8, characterized in that the guiding rod (3) is offset in downward direction towards the first rod swivel axis (20).
  10. Front loader according to any of the claims 1 to 9, characterized in that the guiding rod (3) is bent in downward direction towards the second rod swivel axis (19).
EP07018540A 2006-09-21 2007-09-21 Front loader with mechanical parallel guidance Active EP1903147B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07018540T PL1903147T3 (en) 2006-09-21 2007-09-21 Front loader with mechanical parallel guidance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006044533A DE102006044533A1 (en) 2006-09-21 2006-09-21 Front loader with mechanical parallel guidance

Publications (3)

Publication Number Publication Date
EP1903147A2 EP1903147A2 (en) 2008-03-26
EP1903147A3 EP1903147A3 (en) 2009-03-18
EP1903147B1 true EP1903147B1 (en) 2010-01-13

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ID=38728832

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Application Number Title Priority Date Filing Date
EP07018540A Active EP1903147B1 (en) 2006-09-21 2007-09-21 Front loader with mechanical parallel guidance

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EP (1) EP1903147B1 (en)
AT (1) ATE455212T1 (en)
DE (2) DE102006044533A1 (en)
ES (1) ES2339169T3 (en)
PL (1) PL1903147T3 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3431668A1 (en) 2017-07-17 2019-01-23 Wilhelm Stoll Maschinenfabrik GmbH Front loader and front loader part cladding

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EP2857590B1 (en) 2013-10-04 2022-04-06 Kubota Corporation Front loader
JP6223300B2 (en) * 2013-10-04 2017-11-01 株式会社クボタ Front loader
US9238899B2 (en) 2014-03-27 2016-01-19 Kubota Corporation Front loader
JP1523731S (en) 2014-09-19 2015-05-18
AT517147B1 (en) * 2015-05-04 2017-08-15 Ing Hauer Ronald Boom for a commercial vehicle
SE544752C2 (en) * 2020-07-01 2022-11-01 Aaloe Ab A front loader for a working vehicle and a working vehicle

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US3722724A (en) * 1971-04-19 1973-03-27 Case Co J I Load carrying device with improved position control
DE8207930U1 (en) * 1982-03-20 1982-07-29 Xaver Fendt & Co, 8952 Marktoberdorf FRONT LOADER SWINGARM
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JP3828856B2 (en) * 2002-10-21 2006-10-04 ヤンマー株式会社 Skid steer loader
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Publication number Priority date Publication date Assignee Title
EP3431668A1 (en) 2017-07-17 2019-01-23 Wilhelm Stoll Maschinenfabrik GmbH Front loader and front loader part cladding

Also Published As

Publication number Publication date
PL1903147T3 (en) 2010-06-30
ATE455212T1 (en) 2010-01-15
EP1903147A3 (en) 2009-03-18
EP1903147A2 (en) 2008-03-26
DE102006044533A1 (en) 2008-04-03
ES2339169T3 (en) 2010-05-17
DE502007002601D1 (en) 2010-03-04

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