EP1152091A2 - Loader arm - Google Patents

Loader arm Download PDF

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Publication number
EP1152091A2
EP1152091A2 EP01110548A EP01110548A EP1152091A2 EP 1152091 A2 EP1152091 A2 EP 1152091A2 EP 01110548 A EP01110548 A EP 01110548A EP 01110548 A EP01110548 A EP 01110548A EP 1152091 A2 EP1152091 A2 EP 1152091A2
Authority
EP
European Patent Office
Prior art keywords
support tube
web
loader arm
loader
recess
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.)
Granted
Application number
EP01110548A
Other languages
German (de)
French (fr)
Other versions
EP1152091B1 (en
EP1152091A3 (en
Inventor
Christophe Espanel
Cyrille Vittet
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.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP1152091A2 publication Critical patent/EP1152091A2/en
Publication of EP1152091A3 publication Critical patent/EP1152091A3/en
Application granted granted Critical
Publication of EP1152091B1 publication Critical patent/EP1152091B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • 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
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49616—Structural member making
    • Y10T29/49623—Static structure, e.g., a building component
    • Y10T29/49625—Openwork, e.g., a truss, joist, frame, lattice-type or box beam

Definitions

  • the invention relates to a loader arm, in particular for a front loader, with a support tube as well as a method to its manufacture.
  • Loaders are e.g. B. attached to agricultural tractors and are vertically movable to lift loads.
  • the loader contains a loader arm, on the other cantilevered end a tool is attached while the other end is articulated to the tractor. Because of the length of the loader arm and the attacking Forces occur in the loader arm with considerable bending moments.
  • Various measures have been taken for known loader arms seized to a basically square tube-like support tube to make it more rigid. For example, it is suggested two U-profiles (TRIMA Professional, BAAS TRIMA front loader with PowerLink) or two square profiles that are approximately 75% closed (Faucheux) to nest and close together weld. Another one with "Quicke" front loaders applied procedures are partial on one broadside open square hollow sections placed together and with each other welded to form a closed rigid tube.
  • the bending strength specified by the dimensioning of the web of the web is not determined by the cross-sectional dimensions of the support tube limited if the web over the outer surface of the support tube survives. In such a case, the supernatants In the area of the web or openings or the like be attached to which components can be connected. In addition, the web can be manufactured using a tool are kept in the correct welding position.
  • a smooth surface of the support tube is created in that the web closes with its outer surface.
  • the support tube basically every cross section could have, it is for handling in manufacturing and the guidance of the forces is advantageous when the support tube is out a tube is formed with a square profile. It can the support tube runs both cylindrically and conically be trained. The introduction of the recess in the Narrow side of the square tube causes the web in the Direction of the top web of the support tube extends where the largest Bending moments occur.
  • Conical walls or high ridges of the support tube make it possible to add the load bearing capacity to the adjust expected or wanted force diagram. To this Way, an even load distribution and one optimized use of materials achieved.
  • the inventive method for producing the inventive loader arm makes it possible to carry tubes various dimensions and especially with conical Establish course.
  • FIG 1 is a loader 10 with a loader arm 12, one Console 14, hydraulic motors 16 and a tool 18 shown the one to an unspecified and only by means of one Rades 20 indicated tractor is attached.
  • the loader 10 is designed in the manner of a front loader that especially in agriculture or in the municipal area is used and lifts loads of more than 1000 kg.
  • the loader arm 12 extends between the console 14 and the tool 18 and has a kink of almost 90 degrees. Due to the attacking forces, the loader arm is out formed a support tube 22, which is in the preferred Embodiment each to the kink in the Drawing level expanded conically.
  • the console 14 is used to connect the loader arm 12 to the Agricultural tractor and takes the loader arm 12 vertically swiveling up.
  • the hydraulic motors 16 serve the vertical movement of the Loader arm 12 and are supported at one end on console 14 and at the other end on the loader arm 12 in its kink area each vertically swiveling.
  • the hydraulic motors 16 are in a known manner from a hydraulic system on the Farm tractor controlled. Between the loader arm 12 and the Tool 18 are other hydraulic motors in a known manner provided, but will not be discussed in more detail.
  • the tool 18 is shown as a shovel with which, for. B. sand or the like can be added.
  • the wheel 20 is only representative of the Agricultural tractor and is a front steerable wheel. Another indicated curve stands for a fender.
  • the support tube 22 is detailed in section in Figure 2 shown and contains two trained as high ridges Walls 24, formed as transverse webs narrow sides 26, one Recess 28 and an inserted web 30th
  • the support tube 22 is a tapered square tube formed from an approx. 6 - 10 mm thick steel sheet is formed.
  • the steel sheet is processed according to a Support tube 22 punched, cut, or otherwise shaped and then 90 degrees accordingly edged in the same direction. The edging is done in such a way that finally the recess 28 remains. While in that four bending edges are provided, could also be a round, five, six or other tube profile be provided.
  • the position shown in Figure 2 corresponds the actual installation position.
  • the walls 24 run parallel to one another and extend itself in the vertical direction.
  • the narrow sides 26 also run parallel to one another and perpendicular to the walls 24. While the upper narrow side 26 connects the two walls 24 together, the two end lower narrow sides 26, also called an interrupted Narrow side 26 could be designated, each on the Recess 28.
  • the width of the recess 28 corresponds essentially to that Width of the bridge 30. If a game fit is selected, the Web 30 easily inserted into the recess 28 and by means of of a tool are held until it touches the narrow sides 26 is welded on. Alternatively, the walls 24 pressed together and hold the one in between Bridge 30 frictionally. In the case of a press fit, the Recess 28 initially widened somewhat, the web 30 then used and the narrow sides 26 under Bias brought to the web 30 to the system. The extension can be effected in a simple manner in that the web 30th at the end entering the interior of the support tube 22 beveled slightly.
  • the web 30 is formed from a flat steel and is regular cuboid.
  • the Web 30 on the one hand, about half the height of the interior, while he on the other hand in the area of the cut by about a sixth protrudes beyond the outer surface of the support tube 22. If the the bending forces to be absorbed may require the web 30 also over the entire interior of the support tube 22 and further extend over its outer surface.
  • the web 30 is with the Ends of the narrow sides 26 are welded by means of fillet welds. If the walls 24 are tapered, while the web 30 is cuboid or rectangular, takes over the Support tube 22 projecting area of the web 30 outside Wedge shape.
  • the web extends 30 only in the area of the support tube 22 between the kink and the console 14. Regardless, a web 30 can also in the Area provided between the kink and the tool 18 become. Unlike shown, the web 30 can also extend through the narrow side 26 located above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Agricultural Machines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Vehicle Body Suspensions (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Shovels (AREA)
  • Table Equipment (AREA)
  • Supports For Plants (AREA)
  • Circuits Of Receivers In General (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

A support arm for an excavator, or other lifting equipment, has a hollow cross section (26) and is slit along one side to take a reinforcing strip (30) which is welded to the profile. A simple design uses a rectangular cross section with the narrow sides uppermost and underneath. The slit is cut into a narrow side and runs the length of the arm. The arm cab have tapering or parallel sides. The size and thickness of the reinforcing strip is selected to provide the required strength.

Description

Die Erfindung betrifft eine Laderschwinge, insbesondere für einen Frontlader, mit einem Tragrohr sowie ein Verfahren zu dessen Herstellung.The invention relates to a loader arm, in particular for a front loader, with a support tube as well as a method to its manufacture.

Lader werden z. B. an Ackerschlepper angebracht und sind vertikal beweglich, um Lasten anzuheben. Im Falle eines Frontladers enthält der Lader eine Laderschwinge, an deren freitragenden Ende ein Werkzeug angebracht ist, während das andere Ende mit dem Ackerschlepper gelenkig verbunden ist. Aufgrund der Länge der Laderschwinge und der angreifenden Kräfte treten in der Laderschwinge erhebliche Biegemomente auf. Bei bekannten Laderschwingen wurden verschiedene Maßnahmen ergriffen, um ein grundsätzlich vierkantrohrartiges Tragrohr biegesteifer zu machen. So wird beispielsweise vorgeschlagen, zwei U-Profile (TRIMA Professional, BAAS TRIMA Frontlader mit PowerLink) oder zwei zu ca. 75 % geschlossene Vierkantprofile (Faucheux) ineinander zu verschachteln und miteinander zu verschweißen. Nach einem anderen bei "Quicke"-Frontladern angewandten Verfahren werden zwei an einer Breitseite teilweise offene Vierkanthohlprofile aneinander gelegt und miteinander verschweißt, um ein geschlossenes biegesteifes Rohr zu bilden.Loaders are e.g. B. attached to agricultural tractors and are vertically movable to lift loads. in case of a Front loader, the loader contains a loader arm, on the other cantilevered end a tool is attached while the other end is articulated to the tractor. Because of the length of the loader arm and the attacking Forces occur in the loader arm with considerable bending moments. Various measures have been taken for known loader arms seized to a basically square tube-like support tube to make it more rigid. For example, it is suggested two U-profiles (TRIMA Professional, BAAS TRIMA front loader with PowerLink) or two square profiles that are approximately 75% closed (Faucheux) to nest and close together weld. Another one with "Quicke" front loaders applied procedures are partial on one broadside open square hollow sections placed together and with each other welded to form a closed rigid tube.

Das der Erfindung zugrunde liegende Problem wird darin gesehen, daß die bekannten Laderschwingen zu teuer sind.The problem underlying the invention is seen in that the known loader arms are too expensive.

Dieses Problem wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 bzw. 7 gelöst, wobei in den weiteren Patentansprüchen Merkmale aufgeführt sind, die die Lösung in vorteilhafter Weise weiterentwickeln.This problem is solved according to the invention by the teaching of the patent claim 1 and 7 solved, wherein in the further claims Features are listed that make the solution more advantageous Evolve wisely.

Auf diese Weise kann mit einfachen und kostengünstig auf dem Markt erwerbbaren Halbzeugen eine biegefeste Laderschwinge erzeugt werden. Das Gewicht wird gering gehalten, es werden wenige und einfache Schweißnähte benötigt und die Tragrohre können auf einfache Weise verschieden biegesteif ausgebildet werden. This way you can easily and inexpensively on the A bending-resistant loader arm for marketable semi-finished products be generated. The weight is kept low, it will be few and simple welds required and the support tubes can be designed differently rigid in a simple manner become.

Die durch die Bemessung des Stegs vorgegebene Biegefestigkeit des Stegs wird nicht durch die Querschnittsmaße des Tragrohrs begrenzt, wenn der Steg über die Außenfläche des Tragrohrs übersteht. In einem solchen Fall können in den überstehenden Bereich des Stegs zudem Öffnungen oder dergleichen ein- bzw. angebracht werden, an die Bauteile angeschlossen werden können. Zudem kann der Steg bei der Fertigung mittels eines Werkzeugs in der richtigen Anschweißstellung gehalten werden.The bending strength specified by the dimensioning of the web of the web is not determined by the cross-sectional dimensions of the support tube limited if the web over the outer surface of the support tube survives. In such a case, the supernatants In the area of the web or openings or the like be attached to which components can be connected. In addition, the web can be manufactured using a tool are kept in the correct welding position.

Eine glatte Oberfläche des Tragrohrs wird dadurch erzeugt, daß der Steg mit dessen Außenfläche abschließt.A smooth surface of the support tube is created in that the web closes with its outer surface.

Wenn das Tragrohr grundsätzlich auch jeden Querschnitt aufweisen könnte, ist es für die Handhabung in der Fertigung und die Führung der Kräfte vorteilhaft, wenn das Tragrohr aus einem Rohr mit einem Vierkantprofil gebildet ist. Dabei kann das Tragrohr sowohl zylindrisch als auch konisch verlaufend ausgebildet sein. Die Einbringung der Ausnehmung in die Schmalseite des Vierkantrohrs bewirkt, daß sich der Steg in der Richtung des Hochstegs des Tragrohrs erstreckt, wo die größten Biegemomente auftreten.If the support tube basically every cross section could have, it is for handling in manufacturing and the guidance of the forces is advantageous when the support tube is out a tube is formed with a square profile. It can the support tube runs both cylindrically and conically be trained. The introduction of the recess in the Narrow side of the square tube causes the web in the Direction of the top web of the support tube extends where the largest Bending moments occur.

Die größte Aufnahme von Biegekräften wird dadurch bewirkt, daß sich der Steg über die gesamte Länge des Tragrohrs erstreckt. Es liegt dennoch im Rahmen der Erfindung, wenn der Steg nur in bestimmten Bereichen oder nur über eine Teillänge vorgesehen ist, was sich nach dem zu erwartenden Lastdiagramm ermitteln läßt.The greatest absorption of bending forces is caused by the fact that the web extends over the entire length of the support tube. It is still within the scope of the invention if the web only in certain areas or only provided over a partial length is what is determined based on the expected load diagram leaves.

Konisch verlaufende Wandungen bzw. Hochstege des Tragrohrs machen es möglich, das Lastaufnahmevermögen an das zu erwartende oder gewollte Kräftediagramm anzupassen. Auf diese Weise wird eine gleichmäßige Lastenverteilung und ein optimierter Materialeinsatz erreicht.Conical walls or high ridges of the support tube make it possible to add the load bearing capacity to the adjust expected or wanted force diagram. To this Way, an even load distribution and one optimized use of materials achieved.

Das erfindungsgemäße Verfahren zum Herstellen der erfinderischen Laderschwinge macht es möglich, Tragrohre verschiedenster Abmessungen und insbesondere mit konischem Verlauf herzustellen.The inventive method for producing the inventive loader arm makes it possible to carry tubes various dimensions and especially with conical Establish course.

Auch wenn eine Baureihe von Ladern für verschieden hohe Belastungen ausgelegt ist, reicht die Verwendung eines einzigen Tragrohrs aus, das mit unterschiedlichen Stegen verstärkt wird. Die Biegesteifigkeit kann dadurch geändert werden, daß die Stege höher oder breiter ausgebildet werden, oder aber, indem ein noch festeres Material verwendet wird, das zum Biegen nicht geeignet oder insgesamt zu teuer wäre.Even if a series of loaders for different heights Use of a single load is sufficient Support tube from, which is reinforced with different webs. The bending stiffness can be changed in that the Bridges are formed higher or wider, or by an even firmer material is used that is not used for bending would be suitable or altogether too expensive.

In der Zeichnung ist ein nachfolgend näher beschriebenes Ausführungsbeispiel der Erfindung dargestellt. Es zeigt:

Fig. 1
einen Lader in Seitenansicht und in schematischer Darstellung und
Fig. 2
einen Schnitt durch eine Laderschwinge entlang der Linie 2-2 in Figur 1 und in der Blickrichtung der dazugehörigen Pfeile.
In the drawing, an embodiment of the invention described in more detail below is shown. It shows:
Fig. 1
a loader in side view and in a schematic representation and
Fig. 2
a section through a loader arm along the line 2-2 in Figure 1 and in the direction of the associated arrows.

In Figur 1 ist ein Lader 10 mit einer Laderschwinge 12, einer Konsole 14, Hydraulikmotoren 16 und einem Werkzeug 18 gezeigt, der an einen nicht näher bezeichneten und nur mittels eines Rades 20 angedeuteten Ackerschlepper angebaut ist.In Figure 1 is a loader 10 with a loader arm 12, one Console 14, hydraulic motors 16 and a tool 18 shown the one to an unspecified and only by means of one Rades 20 indicated tractor is attached.

Der Lader 10 ist in der Art eines Frontladers ausgebildet, der insbesondere in der Landwirtschaft oder im kommunalen Bereich eingesetzt wird und Lasten von bis zu mehr als 1000 Kg hebt.The loader 10 is designed in the manner of a front loader that especially in agriculture or in the municipal area is used and lifts loads of more than 1000 kg.

Die Laderschwinge 12 erstreckt sich zwischen der Konsole 14 und dem Werkzeug 18 und weist einen Knick von nahezu 90 Grad auf. Aufgrund der angreifenden Kräfte ist die Laderschwinge aus einem Tragrohr 22 gebildet, das sich in dem bevorzugten Ausführungsbeispiel jeweils zu dem Knick hin in der Zeichnungsebene konisch erweitert. The loader arm 12 extends between the console 14 and the tool 18 and has a kink of almost 90 degrees. Due to the attacking forces, the loader arm is out formed a support tube 22, which is in the preferred Embodiment each to the kink in the Drawing level expanded conically.

Die Konsole 14 dient dem Anschluß der Laderschwinge 12 an den Ackerschlepper und nimmt die Laderschwinge 12 vertikal schwenkbar auf.The console 14 is used to connect the loader arm 12 to the Agricultural tractor and takes the loader arm 12 vertically swiveling up.

Die Hydraulikmotoren 16 dienen der vertikalen Bewegung der Laderschwinge 12 und stützen sich einenends an der Konsole 14 und anderenends an der Laderschwinge 12 in deren Knickbereich jeweils vertikal schwenkbar ab. Die Hydraulikmotoren 16 werden in bekannter Weise von einem Hydrauliksystem auf dem Ackerschlepper gesteuert. Zwischen der Laderschwinge 12 und dem Werkzeug 18 sind in bekannter Weise weitere Hydraulikmotoren vorgesehen, auf die jedoch nicht näher eingegangen wird.The hydraulic motors 16 serve the vertical movement of the Loader arm 12 and are supported at one end on console 14 and at the other end on the loader arm 12 in its kink area each vertically swiveling. The hydraulic motors 16 are in a known manner from a hydraulic system on the Farm tractor controlled. Between the loader arm 12 and the Tool 18 are other hydraulic motors in a known manner provided, but will not be discussed in more detail.

Das Werkzeug 18 ist als eine Schaufel dargestellt, mit der z. B. Sand oder dergl. aufgenommen werden kann.The tool 18 is shown as a shovel with which, for. B. sand or the like can be added.

Das Rad 20 steht lediglich stellvertretend für den Ackerschlepper und ist ein vorderes lenkbares Rad. Eine weitere angedeutete Kurve steht für einen Kotflügel.The wheel 20 is only representative of the Agricultural tractor and is a front steerable wheel. Another indicated curve stands for a fender.

Das Tragrohr 22 ist im Schnitt in Figur 2 ausführlich dargestellt und enthält zwei als Hochstege ausgebildete Wandungen 24, als Querstege ausgebildete Schmalseiten 26, eine Ausnehmung 28 und einen eingesetzten Steg 30.The support tube 22 is detailed in section in Figure 2 shown and contains two trained as high ridges Walls 24, formed as transverse webs narrow sides 26, one Recess 28 and an inserted web 30th

Das Tragrohr 22 ist als konisch verlaufendes Vierkantrohr ausgebildet, das aus einem ca. 6 - 10 mm starken Stahlblech gebildet wird. Das Stahlblech wird gemäß einer Abwicklung des Tragrohrs 22 gestanzt, geschnitten, oder auf sonstige Weise geformt und anschließend entsprechend um jeweils 90 Grad gleichsinnig gekantet. Die Kantung erfolgt derart, daß schließlich die Ausnehmung 28 verbleibt. Während in dem gezeigten Ausführungsbeispiel vier Biegekanten vorgesehen sind, könnte auch ein rundes, fünf-, sechs- oder sonstiges Rohrprofil vorgesehen werden. Die in Figur 2 dargestellte Lage entspricht der tatsächlichen Einbaulage. The support tube 22 is a tapered square tube formed from an approx. 6 - 10 mm thick steel sheet is formed. The steel sheet is processed according to a Support tube 22 punched, cut, or otherwise shaped and then 90 degrees accordingly edged in the same direction. The edging is done in such a way that finally the recess 28 remains. While in that four bending edges are provided, could also be a round, five, six or other tube profile be provided. The position shown in Figure 2 corresponds the actual installation position.

Die Wandungen 24 verlaufen zueinander parallel und erstrecken sich in der vertikalen Richtung.The walls 24 run parallel to one another and extend itself in the vertical direction.

Die Schmalseiten 26 verlaufen ebenfalls zueinander parallel und senkrecht zu den Wandungen 24. Während die obere Schmalseite 26 die beiden Wandungen 24 miteinander verbindet, enden die beiden unteren Schmalseiten 26, die auch als eine unterbrochene Schmalseite 26 bezeichnet werden könnten, jeweils an der Ausnehmung 28.The narrow sides 26 also run parallel to one another and perpendicular to the walls 24. While the upper narrow side 26 connects the two walls 24 together, the two end lower narrow sides 26, also called an interrupted Narrow side 26 could be designated, each on the Recess 28.

Die Weite der Ausnehmung 28 entspricht im wesentlichen der Breite des Stegs 30. Wird eine Spielpassung gewählt, kann der Steg 30 leicht in die Ausnehmung 28 eingeschoben und mittels eines Werkzeugs gehalten werden, bis er an die Schmalseiten 26 angeschweißt ist. Alternativ werden die Wandungen 24 aufeinander zugedrückt und halten den dazwischen befindlichen Steg 30 reibschlüssig. Im Falle einer Preßpassung wird die Ausnehmung 28 zunächst etwas geweitet, der Steg 30 dann eingesetzt und die Schmalseiten 26 anschließend unter Vorspannung an den Steg 30 zur Anlage gebracht. Die Weitung kann in einfacher Weise dadurch bewirkt werden, daß der Steg 30 an dem in den Innenraum des Tragrohrs 22 eintretenden Ende leicht angeschrägt wird.The width of the recess 28 corresponds essentially to that Width of the bridge 30. If a game fit is selected, the Web 30 easily inserted into the recess 28 and by means of of a tool are held until it touches the narrow sides 26 is welded on. Alternatively, the walls 24 pressed together and hold the one in between Bridge 30 frictionally. In the case of a press fit, the Recess 28 initially widened somewhat, the web 30 then used and the narrow sides 26 under Bias brought to the web 30 to the system. The extension can be effected in a simple manner in that the web 30th at the end entering the interior of the support tube 22 beveled slightly.

Der Steg 30 ist aus einem Flachstahl gebildet und regelmäßig quaderförmig. In dem gezeigten Ausführungsbeispiel überragt der Steg 30 einerseits ca. die halbe Höhe des Innenraums, während er andererseits im Bereich des Schnitts um ca. ein Sechstel über die Außenfläche des Tragrohrs 22 übersteht. Wenn die aufzunehmenden Biegekräfte es erfordern, kann sich der Steg 30 auch über den gesamten Innenraum des Tragrohrs 22 und weiter über dessen Außenfläche erstrecken. Der Steg 30 wird mit den Enden der Schmalseiten 26 mittels Kehlnähten verschweißt. Wenn die Wandungen 24 konisch verlaufen, während der Steg 30 quaderförmig bzw. rechteckig gestaltet ist, nimmt der über das Tragrohr 22 außen überstehende Bereich des Stegs 30 eine Keilform ein. The web 30 is formed from a flat steel and is regular cuboid. In the exemplary embodiment shown, the Web 30 on the one hand, about half the height of the interior, while he on the other hand in the area of the cut by about a sixth protrudes beyond the outer surface of the support tube 22. If the the bending forces to be absorbed may require the web 30 also over the entire interior of the support tube 22 and further extend over its outer surface. The web 30 is with the Ends of the narrow sides 26 are welded by means of fillet welds. If the walls 24 are tapered, while the web 30 is cuboid or rectangular, takes over the Support tube 22 projecting area of the web 30 outside Wedge shape.

Bei dem gezeigten Ausführungsbeispiel erstreckt sich der Steg 30 nur in dem Bereich des Tragrohrs 22 zwischen dem Knick und der Konsole 14. Dessen ungeachtet kann ein Steg 30 auch in dem Bereich zwischen dem Knick und dem Werkzeug 18 vorgesehen werden. Anders als dargestellt, kann sich der Steg 30 auch durch die oben gelegene Schmalseite 26 erstrecken.In the embodiment shown, the web extends 30 only in the area of the support tube 22 between the kink and the console 14. Regardless, a web 30 can also in the Area provided between the kink and the tool 18 become. Unlike shown, the web 30 can also extend through the narrow side 26 located above.

Claims (8)

Laderschwinge (12), insbesondere für einen Frontlader, mit einem Tragrohr (22), dadurch gekennzeichnet, daß das Tragrohr (22) eine Ausnehmung (28) aufweist, in die wenigstens annähernd parallel zu einer Wandung (24) ein Steg (30) eingesetzt und mit dem Tragrohr (22) verschweißt ist.Loader arm (12), in particular for a front loader, with a support tube (22), characterized in that the support tube (22) has a recess (28) into which a web (30) is inserted at least approximately parallel to a wall (24) and is welded to the support tube (22). Laderschwinge nach Anspruch 1, dadurch gekennzeichnet, daß der Steg (30) über die Außenfläche des Tragrohrs (22) übersteht.Loader arm according to claim 1, characterized in that the web (30) projects beyond the outer surface of the support tube (22). Laderschwinge nach Anspruch 1, dadurch gekennzeichnet, daß der Steg (30) mit der Außenfläche des Tragrohrs (22) bündig abschließt.Loader arm according to claim 1, characterized in that the web (30) is flush with the outer surface of the support tube (22). Laderschwinge nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß das Tragrohr (22) als rechteckiges Vierkantrohr ausgebildet ist, in dessen Schmalseite (26) die Ausnehmung (28) eingebracht ist.Loader arm according to one or more of the preceding claims, characterized in that the support tube (22) is designed as a rectangular square tube, in the narrow side (26) of which the recess (28) is made. Laderschwinge nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß sich die Ausnehmung (28) über die gesamte Länge des Tragrohrs (22) erstreckt.Loader arm according to one or more of the preceding claims, characterized in that the recess (28) extends over the entire length of the support tube (22). Laderschwinge nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Wandungen (24) des Tragrohrs (22) konisch verlaufen.Loader arm according to one or more of the preceding claims, characterized in that the walls (24) of the support tube (22) are conical. Verfahren zum Herstellen einer Laderschwinge (12) gekennzeichnet durch folgende Verfahrensschritte: a) ein Stahlblech wird gemäß einer Abwicklung eines Tragrohrs (22) der Laderschwinge (12) gestanzt oder geschnitten; b) das Stahlblech wird entsprechend der Anzahl der Kanten des Tragrohrs (22), insbesondere vierfach, um jeweils insbesondere 90 Grad gekantet; c) in eine zwischen den Kanten des gekanteten Tragrohrs (22) verbleibende Ausnehmung (28) wird passend ein Steg (30) eingefügt; d) der Steg (30) wird mit dem Tragrohr (22) verschweißt. Method for producing a loader arm (12) characterized by the following method steps: a) a steel sheet is punched or cut in accordance with a development of a support tube (22) of the loader arm (12); b) the steel sheet is bent according to the number of edges of the support tube (22), in particular four times, in each case in particular 90 degrees; c) a web (30) is suitably inserted into a recess (28) remaining between the edges of the folded support tube (22); d) the web (30) is welded to the support tube (22). Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Größe und/oder das Material des Stegs (30) entsprechend der zu erwartenden Belastung gewählt wird.Method according to Claim 7, characterized in that the size and / or the material of the web (30) is selected in accordance with the load to be expected.
EP01110548A 2000-05-05 2001-04-28 Loader arm Expired - Lifetime EP1152091B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10022021 2000-05-05
DE10022021A DE10022021A1 (en) 2000-05-05 2000-05-05 Loader arm

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EP1152091A2 true EP1152091A2 (en) 2001-11-07
EP1152091A3 EP1152091A3 (en) 2003-01-22
EP1152091B1 EP1152091B1 (en) 2006-06-28

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EP01110548A Expired - Lifetime EP1152091B1 (en) 2000-05-05 2001-04-28 Loader arm

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US (1) US6527496B2 (en)
EP (1) EP1152091B1 (en)
AT (1) ATE331846T1 (en)
CA (1) CA2346323C (en)
DE (2) DE10022021A1 (en)
DK (1) DK1152091T3 (en)
ES (1) ES2262571T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7377740B2 (en) * 2003-04-22 2008-05-27 Cook Technologies, Inc. Lifting device for a personal-transportation vehicle
US9592999B2 (en) * 2011-09-20 2017-03-14 Deere & Company Boom apparatus with nose body
CN103785995A (en) * 2013-12-26 2014-05-14 柳州正菱集团有限公司 Production method for revolving-platform halfpaces of excavators

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CH336789A (en) * 1955-05-15 1959-03-15 Baas Erwin Process for the production of a hollow beam and the beam produced by the process and its use in a load lifter
CH392811A (en) * 1961-09-07 1965-05-31 Nortag Aktiengesellschaft Tubular girder to be used for a load lifter's boom and method for its manufacture
CH393676A (en) * 1962-03-05 1965-06-15 Nortag Aktiengesellschaft Method for producing a cantilever spar
FR2379657A1 (en) * 1977-02-02 1978-09-01 Int Harvester Co Portal boom for tractor loading shovel - has box section legs with round hollow section bars welded into pressed holes in faces
US4459786A (en) * 1981-10-27 1984-07-17 Ro Corporation Longitudinally bowed transversely polygonal boom for cranes and the like
US4576543A (en) * 1983-11-07 1986-03-18 Kmw Products Limited Knock-down construction for front end loader
DE4328662A1 (en) * 1993-08-26 1995-03-02 Krupp Ag Hoesch Krupp Jib profile and/or articulated-tip profile
JPH08119571A (en) * 1994-10-19 1996-05-14 Yuji Uchiumi Steel tube for crane girder
US5611657A (en) * 1995-03-13 1997-03-18 Case Corporation Reinforced loader arm assembly

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US2755572A (en) * 1952-09-06 1956-07-24 John S Pilch Loader
US3890696A (en) * 1973-05-10 1975-06-24 Earl R Buske Tow truck boom and method of constructing same
JPH0726415B2 (en) * 1989-12-13 1995-03-22 株式会社クボタ Work implement boom assembly

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CH336789A (en) * 1955-05-15 1959-03-15 Baas Erwin Process for the production of a hollow beam and the beam produced by the process and its use in a load lifter
CH392811A (en) * 1961-09-07 1965-05-31 Nortag Aktiengesellschaft Tubular girder to be used for a load lifter's boom and method for its manufacture
CH393676A (en) * 1962-03-05 1965-06-15 Nortag Aktiengesellschaft Method for producing a cantilever spar
FR2379657A1 (en) * 1977-02-02 1978-09-01 Int Harvester Co Portal boom for tractor loading shovel - has box section legs with round hollow section bars welded into pressed holes in faces
US4459786A (en) * 1981-10-27 1984-07-17 Ro Corporation Longitudinally bowed transversely polygonal boom for cranes and the like
US4576543A (en) * 1983-11-07 1986-03-18 Kmw Products Limited Knock-down construction for front end loader
DE4328662A1 (en) * 1993-08-26 1995-03-02 Krupp Ag Hoesch Krupp Jib profile and/or articulated-tip profile
JPH08119571A (en) * 1994-10-19 1996-05-14 Yuji Uchiumi Steel tube for crane girder
US5611657A (en) * 1995-03-13 1997-03-18 Case Corporation Reinforced loader arm assembly

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Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09, 30. September 1996 (1996-09-30) -& JP 08 119571 A (UCHIUMI YUJI), 14. Mai 1996 (1996-05-14) *

Also Published As

Publication number Publication date
DK1152091T3 (en) 2006-10-30
US6527496B2 (en) 2003-03-04
EP1152091B1 (en) 2006-06-28
EP1152091A3 (en) 2003-01-22
US20010038789A1 (en) 2001-11-08
ATE331846T1 (en) 2006-07-15
CA2346323A1 (en) 2001-11-05
CA2346323C (en) 2005-04-19
DE10022021A1 (en) 2001-11-08
DE50110308D1 (en) 2006-08-10
ES2262571T3 (en) 2006-12-01

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