EP0744500B1 - Loader with parallel motion tool linkage - Google Patents

Loader with parallel motion tool linkage Download PDF

Info

Publication number
EP0744500B1
EP0744500B1 EP96107712A EP96107712A EP0744500B1 EP 0744500 B1 EP0744500 B1 EP 0744500B1 EP 96107712 A EP96107712 A EP 96107712A EP 96107712 A EP96107712 A EP 96107712A EP 0744500 B1 EP0744500 B1 EP 0744500B1
Authority
EP
European Patent Office
Prior art keywords
implement
arm
connecting means
loader
positioning motor
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
EP96107712A
Other languages
German (de)
French (fr)
Other versions
EP0744500A2 (en
EP0744500A3 (en
Inventor
Henry Friesen
Ken Kengi Oka
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP0744500A2 publication Critical patent/EP0744500A2/en
Publication of EP0744500A3 publication Critical patent/EP0744500A3/en
Application granted granted Critical
Publication of EP0744500B1 publication Critical patent/EP0744500B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; 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
    • E02F3/34Dredgers; 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
    • E02F3/3405Dredgers; 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
    • E02F3/3408Dredgers; 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 parallelogram-type
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00Material or article handling
    • Y10S414/13Handlers utilizing parallel links

Definitions

  • the invention relates to a loader with at least one arm and a tool attached to this swivel, which is parallel to be led.
  • the BOMFORD B3515 Drive-InLoader brochure reveals one Front loader for attachment to a tractor, the one Loader arm and a swing arm connected to it Has tool that can be carried out in various ways can.
  • the position of the tool is determined by a mechanical Controlled parallel guide linkage, the subscriber side to a Plate is connected, on which the tool can also be pivoted is attached. Extends between the plate and the tool there is a hydraulic cylinder for pivoting the tool.
  • the Plate, the loader arm and the tool point common pivot bearing on.
  • This front loader is disadvantageous in that the Tool swivel range is pretty small.
  • a front loader is for moving Bale built up, which emerges from US-A-5,150,999. at This loader has two arms, a parallel linkage and a tool with a mandrel to pick up the bale over the essentially triangular plates connected together. On A hydraulic cylinder is also attached to the plates on the other hand engages the tool to make it incline to the tool Change soil.
  • This loader is for the sole purpose of Bale transport can be used and the tool can still do it in one to pan smaller area.
  • US-A-4,964,778 is a telehandler with only one provided only arm, at its free and the material holder serving end a pallet fork is provided, which means interconnected hydraulic servomotors over the entire Swivel range of the arm is guided parallel to the floor, although it is possible to combine the pallet fork in one to pivot the small area vertically.
  • US-A-4,046,026 is a tilt linkage for a loader known, which has two pairs of handlebars, one of which one end on a tool and the other end on one Arm swivels. At the other end, the handlebars are articulated connected with each other.
  • a trained as a hydraulic motor Actuator is at one end on the tool and at the other end one of the handlebar pairs pivotally attached. If the servomotor apart or moved together, he pivots both Handlebar and thus changes the position of the tool relative to the Poor.
  • the actuator is designed and arranged so that the Piston side is pressurized when the tool is pivoted against gravity and on the piston rod side, when the tool is in the direction of gravity is pivoted.
  • the object underlying the invention is seen in to propose a loader, the tools of which are guided in parallel and can be pivoted through a larger angular range.
  • the guide linkage is used with the or Connection means (s) for both parallel guiding of the tool, as well as the basis or point of attack for the actuating movement of the tool from the horizontal.
  • the arm can be a single arm like one Telescopic loader or backhoe or as two arms on one Loader arm of a front loader. Since all Articulation points on the connecting means can also be provided an existing loader can be retrofitted. Since not a common one Joint of the tool, the arm and the connecting means is present, the tool can also cover a much larger area swing than with the loader according to the brochure BOMFORD B3515 Drive-InLoader.
  • Spreadable handlebars provided in pairs, which at one end on the Servomotor and at the other end on the tool or Attack connecting means represent a scissor system that at slim design provides a large travel range.
  • the linkage of the servomotor in a central area between the points of attack on the plate (s) ensures that its position and thus direction of action in every position of the guide linkage remains essentially the same.
  • connection means As a result of the forked connection of the guide linkage over a guide member on the connecting means takes place in the middle Force transmission necessary for freedom from tension in the respective Storage of the connection means ensures.
  • connection means by means of consoles to the tool, or using a To make carriers and holders quickly exchangeable.
  • the Attack points essentially form the corners of a square
  • the connection means forming plate (s) as a parallel guide member as well as a bearing and point of attack of the handlebars for the swiveling movement of the patient Unload the tool.
  • a loader 10 is of the type Front loader shown, which is attached to a tractor 12 and is only shown in outline.
  • the loader 10 has right and left masts 14, of which only the right in the direction of travel can be seen, and the side of the frame of the tractor 12 arranged and on this in a known, not shown manner are attached.
  • a swing arm of the loader 10 contains two parallel to each other and one in the transverse direction Distance from each other arms 16 which are attached to the are opposite sides of the tractor 12 and whose rear ends via corresponding bolts 18 below the upper ends of the masts 14 can be pivoted thereon are attached. Between each mast 14 and the associated one Arm 16 is connected to a hydraulic lifting cylinder 20.
  • a pair can also have a transverse spacing from one another interconnected holder 25 (see FIG. 2) of a carrier 26 can be used for tools 24 or equipment.
  • the pair of brackets 22 and 25 respectively to the front ends of the pair of arms 16 of the loader 10 in a manner connected, which is explained in more detail below.
  • a linkage assembly is provided which a guide linkage 27 and has a tilt linkage 28.
  • the guide linkage 27 includes a rear one Guide link 30, the rear end portion by means of a Bolt 32 pivotable to the upper portion of the mast 14, and the front end area thereof by means of a bolt 34 rear end portion of a lever-like plate assembly 36 is connected, a pair of identical and one Cross-spaced triangular plates contains.
  • a bottom section or lower section of the The plate assembly 36 is attached to one by means of a bolt 38 Bow section of the respective arm 16 of the loader 10 pivotable connected.
  • a front corner area of the panel assembly 36 is attached to a rear end of a bolt 40 front guide member 42 connected.
  • this guide member 42 a contains fork-shaped front end portion, that of right or left strips 44 and 46 is formed, the opposite sides of a parallelogram Plate assembly are provided, the connecting means 48th forms.
  • the connection means 48 is composed of a pair identical right-hand one with a transverse distance and left plates 50 and 52 together, the front End area of the right bar 44 by means of a bolt 54 an upper middle corner area of plate 50 and the front End region of the left bar 46 by means of a bolt 56 a corresponding upper middle corner area of the left Plate 52 is connected.
  • the plates 50 and 52 encompass the front end portion of the respective arm 16 and are on this connected by means of a bolt 58 which extends through the Plates 50, 52 at corresponding lower middle corner areas extends.
  • each connection means 48 The front end portions of the spaced plates 50 and 52 of each connection means 48 are arranged such that they one of the associated brackets 22 or the holder 25 of the carrier 26 embrace, their respective front end area by means of a pin 60 pivotable to a lower portion of the Console 22 or the holder 25 is connected.
  • connection means 48 serves as a connection between the Guide linkage 27 and the tilt linkage 28.
  • each tilt linkage contains 28 right and left rear Handlebars 64 and 66 and right and left front links 68 and 70.
  • the rear pair of links 64 and 66 has rear End areas that are within the relevant rear Corner areas of the parallelogram-shaped plates 50 and 52 are located and connected to this with bolts 72, wherein only one bolt 72 connecting plate 52 to handlebar 66 is shown.
  • the front pair of handlebars 68 and 70 is with its front corner or end areas to the neighboring ones Brackets 22 or bracket 25 by means of a bolt 74 connected.
  • the actuator 80 can both a hydraulic or pneumatic piston-cylinder unit be an electric motor as well.
  • each holder 25 is designed that he quickly attached to a tool 24 or equipment can be connected.
  • Rod 84 between and through upper regions of the holder 25, each latter including an angled portion 86 attached to the lower front corner region of the holder 25 is welded, and has an upright leg that has a lower front Contact surface forms. The upright leg is in the middle provided recess.
  • On the back of the tool 24 a pair of hooks 88 opening downwards are provided, which cooperate with the rod 84, the holder 25 connects with each other, and the opposite sides each holder 25, the rod 84 fit snugly.
  • a tapered backward one extending bolt 90 is provided, which is in the with the Recess leg of the angle part 86 is located.
  • the tool 24 can be raised by extending the lifting cylinders 20.
  • the guide linkage 27 acts during such a lifting process such that it maintains the position of the tool 24 what as a result of hinge points 18, 32, 34 and 38, the one form the first parallelogram, and because of the articulation points 38, 40, 56 and 58, which describe a second parallelogram. If the setting of the parallelogram-shaped connecting means 48 remains constant over the entire stroke range of the arms 16 can be seen that the tool 24 in any position of the arms 16 within the stroke range over its entire range can move.
  • a back swing i.e. H.
  • the actuators 80 are in one fully extended position and the tool 24 around one An angle of 43 degrees to the horizontal in one completely swung back position shown.
  • the Tool 24 can so far in any position of the arms 16 be pivoted back.
  • the Tool 24 is shown in FIG. 1 with solid lines raised arms 16 in a fully tilted position shown, the angle between the horizontal and the lower reference line of the tool 24 is 90 degrees. This Position can be reached in any position of the arms 16, which is high enough that the tool 24 has its connection means 48 can pivot down without the floor or one touch the underlying obstacle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Manipulator (AREA)

Description

Die Erfindung betrifft einen Lader mit wenigstens einem Arm und einem an diesem schwenkbar angebrachten Werkzeug, das parallel geführt wird.The invention relates to a loader with at least one arm and a tool attached to this swivel, which is parallel to be led.

Der Prospekt BOMFORD B3515 Drive-InLoader offenbart einen Frontlader zum Anbau an einen Ackerschlepper, der eine Laderschwinge und ein an diese schwenkbar angeschlossenes Werkzeug aufweist, das in verschiedenster Weise ausgeführt sein kann. Die Stellung des Werkzeugs wird über ein mechanisches Parallelführungsgestänge gesteuert, das nehmerseitig an eine Platte angeschlossen ist, an der auch das Werkzeug schwenkbar befestigt ist. Zwischen der Platte und dem Werkzeug erstreckt sich ein Hydraulikzylinder zum Verschwenken des Werkzeugs. Die Platte, die Laderschwinge und das Werkzeug weisen ein gemeinsames Schwenklager auf.The BOMFORD B3515 Drive-InLoader brochure reveals one Front loader for attachment to a tractor, the one Loader arm and a swing arm connected to it Has tool that can be carried out in various ways can. The position of the tool is determined by a mechanical Controlled parallel guide linkage, the subscriber side to a Plate is connected, on which the tool can also be pivoted is attached. Extends between the plate and the tool there is a hydraulic cylinder for pivoting the tool. The Plate, the loader arm and the tool point common pivot bearing on.

Dieser Frontlader ist insofern nachteilig, als der Schwenkbereich des Werkzeugs ziemlich gering ist.This front loader is disadvantageous in that the Tool swivel range is pretty small.

In vergleichbarer Weise ist ein Frontlader zum Bewegen von Ballen aufgebaut, der aus der US-A-5,150,999 hervorgeht. Bei diesem Lader sind zwei Arme, ein Parallelführungsgestänge und ein Werkzeug mit einem Dorn zur Aufnahme des Ballens über im wesentlichen dreiecksförmige Platten miteinander verbunden. An den Platten ist auch ein Hydraulikzylinder angebracht, der anderenends an dem Werkzeug angreift, um dessen Neigung zu dem Boden zu verändern.Similarly, a front loader is for moving Bale built up, which emerges from US-A-5,150,999. at This loader has two arms, a parallel linkage and a tool with a mandrel to pick up the bale over the essentially triangular plates connected together. On A hydraulic cylinder is also attached to the plates on the other hand engages the tool to make it incline to the tool Change soil.

Dieser Lader ist nur für diesen einzigen Zweck des Ballentransports brauchbar und vermag das Werkzeug in einem noch kleineren Bereich zu schwenken.This loader is for the sole purpose of Bale transport can be used and the tool can still do it in one to pan smaller area.

Gemäß der US-A-4,964,778 ist ein Teleskoplader mit nur einem einzigen Arm versehen, an dessen freien und der Materialaufnahme dienenden Ende eine Palettengabel vorgesehen ist, die mittels miteinander verbundener Hydraulikstellmotoren über den gesamten Schwenkbereich des Arms parallel zu dem Boden geführt wird, wobei es allerdings möglich ist, die Palettengabel in einem geringen Bereich vertikal zu schwenken.According to US-A-4,964,778 is a telehandler with only one provided only arm, at its free and the material holder serving end a pallet fork is provided, which means interconnected hydraulic servomotors over the entire Swivel range of the arm is guided parallel to the floor, although it is possible to combine the pallet fork in one to pivot the small area vertically.

Aus der US-A-4,046,026 ist ein Kippgestänge für einen Lader bekannt, das zwei Paar Lenker aufweist, von denen das eine einenends an einem Werkzeug und das andere einenends an einem Arm schwenkbar angreift. Anderenends sind die Lenker gelenkig miteinander verbunden. Ein als Hydraulikmotor ausgebildeter Stellmotor ist einenends an dem Werkzeug und anderenends an einem der Lenkerpaare schwenkbar angebracht. Wenn der Stellmotor auseinander- oder zusammengefahren wird, verschwenkt er beide Lenker und ändert somit die Stellung des Werkzeugs gegenüber dem Arm. Der Stellmotor ist so ausgebildet und angeordnet, daß die Kolbenseite mit Druckmittel beaufschlagt wird, wenn das Werkzeug entgegen der Schwerkraft geschwenkt wird und an der Kolbenstangenseite, wenn das Werkzeug in der Richtung der Schwerkraft geschwenkt wird.From US-A-4,046,026 is a tilt linkage for a loader known, which has two pairs of handlebars, one of which one end on a tool and the other end on one Arm swivels. At the other end, the handlebars are articulated connected with each other. A trained as a hydraulic motor Actuator is at one end on the tool and at the other end one of the handlebar pairs pivotally attached. If the servomotor apart or moved together, he pivots both Handlebar and thus changes the position of the tool relative to the Poor. The actuator is designed and arranged so that the Piston side is pressurized when the tool is pivoted against gravity and on the piston rod side, when the tool is in the direction of gravity is pivoted.

Mit diesem Kippgestänge kann zwar ein großer Kippwinkel, aber keine Parallelführung erreicht werden.With this tilt linkage, a large tilt angle can, however no parallel guidance can be achieved.

Die der Erfindung zugrunde liegende Aufgabe wird darin gesehen, einen Lader vorzuschlagen, dessen Werkzeug parallel geführt und um einen größeren Winkelbereich geschwenkt werden kann.The object underlying the invention is seen in to propose a loader, the tools of which are guided in parallel and can be pivoted through a larger angular range.

Diese Aufgabe wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 gelöst, wobei in den weiteren Patentansprüchen die Lösung in vorteilhafter Weise weiterentwickelnde Merkmale aufgeführt sind.This object is achieved by the teaching of the claim 1 solved, the in the further claims Features that further develop features in an advantageous manner are listed.

Auf diese Weise dient das Führungsgestänge mit dem oder den Anschlußmittel(n) sowohl zum parallelen Führen des Werkzeugs, wie auch als Grundlage bzw. Angriffspunkt für die Stellbewegung des Werkzeugs aus der Horizontalen. Mithin wird der Schwenkbereich des Werkzeugs an sich nicht von einem sich ändernden Winkel zwischen dem Werkzeug und dem Arm beeinträchtigt. Der Arm kann als einzelner Arm wie bei einem Teleskoplader oder Heckbagger oder als zwei Arme an einer Laderschwinge eines Frontladers ausgebildet sein. Da alle Anlenkpunkte an dem Anschlußmittel vorgesehen sind, kann auch ein bestehender Lader nachgerüstet werden. Da kein gemeinsames Gelenk des Werkzeugs, des Arms und des Anschlußmittels vorliegt, kann das Werkzeug auch um einen wesentlich größeren Bereich schwenken als bei dem Lader nach dem Prospekt BOMFORD B3515 Drive-InLoader.In this way, the guide linkage is used with the or Connection means (s) for both parallel guiding of the tool, as well as the basis or point of attack for the actuating movement of the tool from the horizontal. Hence the Swivel range of the tool itself is not one of itself changing angle between the tool and the arm impaired. The arm can be a single arm like one Telescopic loader or backhoe or as two arms on one Loader arm of a front loader. Since all Articulation points on the connecting means can also be provided an existing loader can be retrofitted. Since not a common one Joint of the tool, the arm and the connecting means is present, the tool can also cover a much larger area swing than with the loader according to the brochure BOMFORD B3515 Drive-InLoader.

Die Anordnung der Anlenkpunkte des Werkzeugs, des Arms, des Lenkers und des Führungsgestänges jeweils in den Eckbereichen eines Quadrates oder Trapezes führt zu gleichförmigen und proportionalen Bewegungen während der Führungs- und Stellbewegung.The arrangement of the articulation points of the tool, the arm, the Handlebar and the guide rod in the corner areas of a square or trapezoid leads to uniform and proportional movements during leadership and Adjusting movement.

Die Verwendung zweier gleicher Platten und Anordnung beiderseits des Arms bringt eine Fertigungsvereinfachung mit sich und vermeidet die Bildung übermäßiger Torsionskräfte.The use of two identical plates and arrangement on both sides of the arm brings with it a simplification of production and avoids the formation of excessive torsional forces.

Paarweise vorgesehene spreizbare Lenker, die einenends an dem Stellmotor und anderenends an dem Werkzeug bzw. dem Anschlußmittel angreifen, stellen ein Scherensystem dar, das bei schlanker Bauweise einen großen Stellweg erbringt.Spreadable handlebars provided in pairs, which at one end on the Servomotor and at the other end on the tool or Attack connecting means represent a scissor system that at slim design provides a large travel range.

Die Anlenkung des Stellmotors in einem Mittenbereich zwischen den Angriffsstellen an der/den Platte(n) stellt sicher, daß dessen Stellung und somit Wirkungsrichtung bei jeder Stellung des Führungsgestänges jedenfalls im wesentlichen gleich bleibt.The linkage of the servomotor in a central area between the points of attack on the plate (s) ensures that its position and thus direction of action in every position of the guide linkage remains essentially the same.

Infolge der gabelförmigen Anbindung des Führungsgestänges über ein Führungsglied an dem Anschlußmittel erfolgt eine mittige Kräfteeinleitung, die für Spannungsfreiheit in den jeweiligen Lagerungen des Anschlußmittels sorgt.As a result of the forked connection of the guide linkage over a guide member on the connecting means takes place in the middle Force transmission necessary for freedom from tension in the respective Storage of the connection means ensures.

Je nach der Ausbildung des Werkzeugs und des Laders ist es aus Kostengründen vorteilhaft, das Anschlußmittel mittels Konsolen an das Werkzeug anzuschließen, oder unter Benutzung eines Trägers und Haltern schnellwechselbar zu gestalten.Depending on the design of the tool and the loader, it is over Advantageous in terms of cost, the connection means by means of consoles to the tool, or using a To make carriers and holders quickly exchangeable.

Wenn der Stellmotor zum Beladen ausgefahren wird, d. h. an seiner Kolbenseite mit Druckmittel beaufschlagt wird, kann er die größte Kraft aufbringen und somit ein hohes Losreismoment erzeugen. Andererseits wird beim Entladen des Werkzeugs bei einem doppeltwirkenden Hydraulikzylinder das Druckmittel an der Kolbenstangenseite zugeführt, was zu einer schnelleren Bewegung des Stellmotors führt, da die zuzuführende Menge bei gleichem Stellweg geringer ist.When the actuator is extended for loading, i. H. on pressure medium is applied to its piston side, it can exert the greatest force and thus a high release torque produce. On the other hand, when unloading the tool a double-acting hydraulic cylinder the pressure medium on the Piston rod side fed, resulting in faster movement of the servomotor, since the quantity to be supplied is the same Travel is less.

Bei einer Anordnung der Anlenkstellen derart, daß das Führungsgestänge in einem oberen Mittenbereich, der Arm in einem unteren Mittenbereich, ein rückwärtiger Lenker in einem rückwärtigen Bereich und das Werkzeug in einem vorderen Bereich jeweils der Platte(n) schwenkbar angreift, wobei die Angriffsstellen im wesentlichen die Ecken eines Vierecks bilden, ergibt sich eine optimale Ausnutzung der das Anschlußmittel bildenden Platte(n) als Parallelführungsglied wie auch als Lager und Angriffspunkt der Lenker für die Schwenkbewegung beim Beund Entladen des Werkzeugs.With an arrangement of the articulation points such that the Guide rods in an upper middle area, the arm in one lower center, a rear handlebar in one rear area and the tool in a front area each of the plate (s) pivotally engages, the Attack points essentially form the corners of a square, there is an optimal utilization of the connection means forming plate (s) as a parallel guide member as well as a bearing and point of attack of the handlebars for the swiveling movement of the patient Unload the tool.

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

Fig. 1
einen Ackerschlepper mit einem erfindungsgemäßen Lader in schematischer Darstellung und Seitenansicht und
Fig. 2
einen Ausschnitt des Laders in perspektivischer Ansicht.
In the drawing, an embodiment of the invention described in more detail below is shown. It shows:
Fig. 1
a tractor with a loader according to the invention in a schematic representation and side view
Fig. 2
a section of the loader in a perspective view.

In Figur 1 ist ein erfindungsgemäßer Lader 10 in der Art eines Frontladers gezeigt, der an einen Ackerschlepper 12 angebaut und nur in Umrissen dargestellt ist. Der Lader 10 weist rechte und linke Masten 14 auf, von denen nur der in Fahrtrichtung rechte zu sehen ist, und die seitlich des Rahmens des Ackerschleppers 12 angeordnet und an diesen in bekannter, nicht gezeigter Weise angebracht sind. Eine Schwinge des Laders 10 enthält zwei parallel zueinander verlaufende und in der Querrichtung einen Abstand zueinander aufweisende Arme 16, die sich an den gegenüberliegenden Seiten des Ackerschleppers 12 befinden und deren rückwärtige Enden über entsprechende Bolzen 18 unterhalb der oberen Enden der Masten 14 an diesen jeweils schwenkbar angebracht sind. Zwischen jedem Mast 14 und dem dazugehörigen Arm 16 ist ein hydraulischer Hubzylinder 20 geschaltet. Ein Paar einen Querabstand zueinander aufweisender Konsolen 22 von denen nur die in Fahrtrichtung rechte zu sehen ist, ist an die Rückseite eines Werkzeugs 24 oder einer Ausrüstung - in diesem Fall einer Schaufel- angeschlossen. Anstelle der Konsolen 22 kann auch ein Paar einen Querabstand zueinander aufweisender miteinander verbundener Halter 25 (sh. Figur 2) eines Trägers 26 für Werkzeuge 24 oder Ausrüstungen verwendet werden. In jedem Fall ist das Paar Konsolen 22 bzw. Halter 25 jeweils an die vorderen Enden des Paars Arme 16 des Laders 10 in einer Weise angeschlossen, die nachfolgend näher erläutert wird. Zwischen den oberen Enden der beiden Maste 14 und bis zu dem Paar Konsolen 22 (Fig. 1) oder Halter 25 des Trägers 26 (Fig. 2) ist ein Gestängeverbund vorgesehen, der ein Führungsgestänge 27 und ein Kippgestänge 28 aufweist.In Figure 1, a loader 10 according to the invention is of the type Front loader shown, which is attached to a tractor 12 and is only shown in outline. The loader 10 has right and left masts 14, of which only the right in the direction of travel can be seen, and the side of the frame of the tractor 12 arranged and on this in a known, not shown manner are attached. A swing arm of the loader 10 contains two parallel to each other and one in the transverse direction Distance from each other arms 16 which are attached to the are opposite sides of the tractor 12 and whose rear ends via corresponding bolts 18 below the upper ends of the masts 14 can be pivoted thereon are attached. Between each mast 14 and the associated one Arm 16 is connected to a hydraulic lifting cylinder 20. A few a transverse spacing of consoles 22 of which only the one on the right in the direction of travel is on the Back of a tool 24 or equipment - in this Case of a bucket connected. Instead of the consoles 22 a pair can also have a transverse spacing from one another interconnected holder 25 (see FIG. 2) of a carrier 26 can be used for tools 24 or equipment. In each Case is the pair of brackets 22 and 25 respectively to the front ends of the pair of arms 16 of the loader 10 in a manner connected, which is explained in more detail below. Between the top ends of the two masts 14 and up to the pair Brackets 22 (Fig. 1) or holder 25 of the carrier 26 (Fig. 2) a linkage assembly is provided which a guide linkage 27 and has a tilt linkage 28.

Im einzelnen enthält das Führungsgestänge 27 einen rückwärtigen Führungslenker 30, dessen rückwärtiger Endbereich mittels eines Bolzens 32 schwenkbar an den oberen Bereich des Masts 14, und dessen vorderer Endbereich mittels eines Bolzens 34 an einen rückwärtigen Endbereich eines hebelartigen Plattenzusammenbaus 36 angeschlossen ist, der ein Paar identischer und einen Querabstand zueinander aufweisender dreiecksförmiger Platten enthält. Ein Bodenabschnitt oder unterer Abschnitt des Plattenzusammenbaus 36 ist mittels eines Bolzens 38 an einen Bogenabschnitt des jeweiligen Arms 16 des Laders 10 schwenkbar angeschlossen. Ein vorderer Eckbereich des Plattenzusammenbaus 36 ist mittels eines Bolzens 40 an ein rückwärtiges Ende eines vorderen Führungsglieds 42 angeschlossen. Mit weiterem Bezug auf Figur 2 ist ersichtlich, daß dieses Führungsglied 42 einen gabelförmigen vorderen Endabschnitt enthält, der von rechten bzw. linken Leisten 44 und 46 gebildet wird, die an gegenüberliegenden Seiten eines parallelogrammförmigen Plattenzusammenbaus vorgesehen sind, der ein Anschlußmittel 48 bildet. Das Anschlußmittel 48 setzt sich aus einem Paar identischer, einen Querabstand zueinander aufweisender rechter bzw. linker Platten 50 und 52 zusammen, wobei der vordere Endbereich der rechten Leiste 44 mittels eines Bolzens 54 an einen oberen mittleren Eckbereich der Platte 50 und der vordere Endbereich der linken Leiste 46 mittels eines Bolzens 56 an einen entsprechenden oberen mittleren Eckbereich der linken Platte 52 angeschlossen ist. Die Platten 50 und 52 umgreifen den vorderen Endbereich des jeweiligen Arms 16 und sind an diesen mittels eines Bolzens 58 angeschlossen, der sich durch die Platten 50, 52 an entsprechenden unteren mittleren Eckbereichen erstreckt. Die vorderen Endbereiche der beabstandeten Platten 50 und 52 jedes Anschlußmittels 48 sind derart angeordnet, daß sie eine der zugeordneten Konsolen 22 oder den Halter 25 des Trägers 26 umgreifen, wobei deren jeweiliger vorderer Endbereich mittels eines Bolzens 60 schwenkbar an einen unteren Abschnitt der Konsole 22 bzw. des Halters 25 angeschlossen ist.Specifically, the guide linkage 27 includes a rear one Guide link 30, the rear end portion by means of a Bolt 32 pivotable to the upper portion of the mast 14, and the front end area thereof by means of a bolt 34 rear end portion of a lever-like plate assembly 36 is connected, a pair of identical and one Cross-spaced triangular plates contains. A bottom section or lower section of the The plate assembly 36 is attached to one by means of a bolt 38 Bow section of the respective arm 16 of the loader 10 pivotable connected. A front corner area of the panel assembly 36 is attached to a rear end of a bolt 40 front guide member 42 connected. With further reference to Figure 2 can be seen that this guide member 42 a contains fork-shaped front end portion, that of right or left strips 44 and 46 is formed, the opposite sides of a parallelogram Plate assembly are provided, the connecting means 48th forms. The connection means 48 is composed of a pair identical right-hand one with a transverse distance and left plates 50 and 52 together, the front End area of the right bar 44 by means of a bolt 54 an upper middle corner area of plate 50 and the front End region of the left bar 46 by means of a bolt 56 a corresponding upper middle corner area of the left Plate 52 is connected. The plates 50 and 52 encompass the front end portion of the respective arm 16 and are on this connected by means of a bolt 58 which extends through the Plates 50, 52 at corresponding lower middle corner areas extends. The front end portions of the spaced plates 50 and 52 of each connection means 48 are arranged such that they one of the associated brackets 22 or the holder 25 of the carrier 26 embrace, their respective front end area by means of a pin 60 pivotable to a lower portion of the Console 22 or the holder 25 is connected.

Das Anschlußmittel 48 dient als Verbindung zwischen den Führungsgestänge 27 und dem Kippgestänge 28. Im einzelnen enthält jedes Kippgestänge 28 rechte bzw. linke rückwärtige Lenker 64 bzw. 66 und rechte bzw. linke vordere Lenker 68 bzw. 70. Das rückwärtige Paar Lenker 64 und 66 besitzt rückwärtige Endbereiche, die sich innerhalb der betreffenden rückwärtigen Eckbereiche der parallelogrammförmigen Platten 50 bzw. 52 befinden und an diesen mit Bolzen 72 angeschlossen sind, wobei nur ein die Platte 52 mit dem Lenker 66 verbindender Bolzen 72 gezeigt ist. Das vordere Paar der Lenker 68 und 70 ist mit seinen vorderen Eck- bzw. Endbereichen an die benachbarten Konsolen 22 oder Halter 25 mittels eines Bolzens 74 angeschlossen. Die vorderen Endbereiche des rückwärtigen Paars Lenker 64 und 66 überlagern die rückwärtigen Enden des vorderen Paars der Lenker 68 und 70 und werden schwenkbar von einem Zapfen 76 aufgenommen, der sich von einem Ring 78 nach außen erstreckt, der an den Zylinder eines Stellmotors 80 angeschlossen ist, wobei der Stellmotor 80 ein Stangenende enthält, das sich mittig zwischen den Platten 50 und 52 des Anschlußmittels 48 erstreckt und an diese mittels eines Bolzens 82 schwenkbar angeschlossen ist. Der Stellmotor 80 kann sowohl eine hydraulisch oder pneumatisch wirkende Kolben-Zylinder-Einheit als auch ein Elektromotor sein. The connection means 48 serves as a connection between the Guide linkage 27 and the tilt linkage 28. In detail each tilt linkage contains 28 right and left rear Handlebars 64 and 66 and right and left front links 68 and 70. The rear pair of links 64 and 66 has rear End areas that are within the relevant rear Corner areas of the parallelogram-shaped plates 50 and 52 are located and connected to this with bolts 72, wherein only one bolt 72 connecting plate 52 to handlebar 66 is shown. The front pair of handlebars 68 and 70 is with its front corner or end areas to the neighboring ones Brackets 22 or bracket 25 by means of a bolt 74 connected. The front end portions of the rear pair Handlebars 64 and 66 overlap the rear ends of the front Pair of handlebars 68 and 70 and are pivoted by one Pin 76 added, extending from a ring 78 to the outside extends to the cylinder of an actuator 80 is connected, the actuator 80 is a rod end contains the middle between the plates 50 and 52 of the Connection means 48 extends to this by means of a bolt 82 is pivotally connected. The actuator 80 can both a hydraulic or pneumatic piston-cylinder unit be an electric motor as well.

Wie aus Figur 2 hervorgeht, ist jeder Halter 25 so ausgebildet, daß er schnell an ein Werkzeug 24 oder eine Ausrüstung angeschlossen werden kann. Zu diesem Zweck erstreckt sich eine Stange 84 zwischen und durch obere Bereiche des Halters 25, wobei jeder letztgenannte ein Winkelteil 86 enthält, das an den unteren vorderen Eckbereich der Halter 25 angeschweißt ist, und einen aufrechten Schenkel aufweist, der eine untere vordere Anlagefläche bildet. Der aufrechte Schenkel ist mit einer mittig gelegenen Ausnehmung versehen. Auf der Rückseite des Werkzeugs 24 ist ein Paar sich nach unten öffnender Haken 88 vorgesehen, die mit der Stange 84 zusammenwirken, die die Halter 25 miteinander verbindet, und die nahe gegenüberliegender Seiten jedes Halters 25 die Stange 84 enganliegend aufnehmen. Des weiteren ist ein sich rückwärtig erstreckender, konisch verlaufender Bolzen 90 vorgesehen, der sich in dem mit der Ausnehmung versehenen Schenkel des Winkelteils 86 befindet.As can be seen from FIG. 2, each holder 25 is designed that he quickly attached to a tool 24 or equipment can be connected. For this purpose, one extends Rod 84 between and through upper regions of the holder 25, each latter including an angled portion 86 attached to the lower front corner region of the holder 25 is welded, and has an upright leg that has a lower front Contact surface forms. The upright leg is in the middle provided recess. On the back of the tool 24 a pair of hooks 88 opening downwards are provided, which cooperate with the rod 84, the holder 25 connects with each other, and the opposite sides each holder 25, the rod 84 fit snugly. Of another is a tapered backward one extending bolt 90 is provided, which is in the with the Recess leg of the angle part 86 is located.

Es folgt eine wesentliche Beschreibung der Funktion der Erfindung. Ausgehend von einer Situation, in der sich das Werkzeug 24 in einer ebenen, waagrechten Stellung bei abgesenkten Armen 16 befindet, wie dies in unterbrochenen Linien in Figur 1 oder in Figur 2 gezeigt ist, kann das Werkzeug 24 angehoben werden, indem die Hubzylinder 20 ausgefahren werden. Während eines solchen Hubvorgangs wirkt das Führungsgestänge 27 derart, daß es die Stellung des Werkzeugs 24 beibehält, was infolge der Gelenkpunkte 18, 32, 34 und 38 erfolgt, die ein erstes Parallelogramm bilden, und aufgrund der Gelenkpunkte 38, 40, 56 und 58, die ein zweites Parallelogramm beschreiben. Wenn die Einstellung des parallelogrammförmigen Anschlußmittels 48 über den gesamten Hubbereich der Arme 16 konstant bleibt, wird ersichtlich, daß sich das Werkzeug 24 in jeder Stellung der Arme 16 innerhalb des Hubbereichs über seinen gesamten Bereich bewegen kann.There follows an essential description of the function of the Invention. Based on a situation in which the Tool 24 in a flat, horizontal position lowered arms 16, as shown in broken lines 1 or in FIG. 2, the tool 24 can be raised by extending the lifting cylinders 20. The guide linkage 27 acts during such a lifting process such that it maintains the position of the tool 24 what as a result of hinge points 18, 32, 34 and 38, the one form the first parallelogram, and because of the articulation points 38, 40, 56 and 58, which describe a second parallelogram. If the setting of the parallelogram-shaped connecting means 48 remains constant over the entire stroke range of the arms 16 can be seen that the tool 24 in any position of the arms 16 within the stroke range over its entire range can move.

Wenn es gewünscht ist, kann ein Zurück-Schwenken, d. h. Nach-Hinten-Schwenken des Werkzeugs 24 durch das Ausfahren des Stellmotors 80 bewirkt werden, so daß die von Bolzen 72 und 74 gebildeten Anschlußstellen aufeinanderzubewegt werden, was bewirkt, daß das Werkzeug 24 um das Paar Bolzen 60, die jeweils das Paar Konsolen 22 oder Halter 25 an das parallelogrammförmige Anschlußmittel 48 anschließen, nach hinten schwenkt. In der Zwischenstellung der Arme 16, wie sie in strich-punktierten Linien in Figur 1 gezeigt ist, sind die Stellmotoren 80 in einer vollkommen ausgefahrenen Stellung und das Werkzeug 24 um einen Winkel von 43 Grad gegenüber der Horizontalen in einer vollkommen zurückgeschwenkten Stellung dargestellt. Das Werkzeug 24 kann in jeder Stellung der Arme 16 soweit zurückgeschwenkt werden. Tatsächlich ist es auch üblich, das Werkzeug 24 zurückzuschwenken, während der Ackerschlepper 12 in einen Haufen zu beförderndes Material eingefahren wird, um das Werkzeug 24 mit solchem Material zu füllen. Es ist bemerkenswert, daß der Leistungsbedarf bei einem solchen "Ausbrechbetrieb" ziemlich hoch sein kann, und daß im Falle eines hydraulischen Stellmotors 80 dieser so angeordnet ist, daß Druckmittel dem Zylinderende zugeführt wird, um so auf die volle Kolbenfläche zu wirken und eine maximale Kraft für diesen Betrieb zu erzeugen. Andererseits bedarf das Absenken des Werkzeugs 24 nur relativ wenig Leistung, da das Gewicht des Materials diese Bewegung unterstützt. Diese Bewegung wird mittels des Einfahrens des Stellmotors 80 durchgeführt, so daß das Werkzeug 24 um die Bolzen 60 nach unten schwenkt, die das Werkzeug 24 mit dem parallelogrammförmigen Anschlußmittel 48 verbinden, wobei das Zusammenfahren des Stellmotors 80 bei der schnellstmöglichen und gewünschten Geschwindigkeit erfolgt. Das Werkzeug 24 ist in Figur 1 mit ausgezogenen Linien bei angehobenen Armen 16 in einer vollkommen abgekippten Stellung gezeigt, wobei der Winkel zwischen der Horizontalen und der unteren Bezugslinie des Werkzeugs 24 90 Grad beträgt. Diese Stellung kann bei jeder Position der Arme 16 erreicht werden, die hoch genug ist, daß das Werkzeug 24 um sein Anschlußmittel 48 nach unten schwenken kann, ohne den Boden oder ein darunterliegendes Hindernis zu berühren.If desired, a back swing, i.e. H. After-rear pan of the tool 24 by extending the Actuator 80 are caused so that the bolts 72 and 74th formed connection points are moved towards each other what causes the tool 24 around the pair of bolts 60, each the pair of brackets 22 or holder 25 to the parallelogram Connect connection means 48, swivels backwards. In the Intermediate position of the arms 16, as in dash-dotted lines 1, the actuators 80 are in one fully extended position and the tool 24 around one An angle of 43 degrees to the horizontal in one completely swung back position shown. The Tool 24 can so far in any position of the arms 16 be pivoted back. In fact, it is common for that Swing tool 24 back while the tractor 12 in a pile of material to be conveyed is brought in to make the Fill tool 24 with such material. It is remarkable that the power requirement at such "Breakout operation" can be quite high, and that in the case a hydraulic actuator 80 this is arranged so that Pressure medium is fed to the cylinder end, so as to the full Piston area to act and a maximum force for this Generating operation. On the other hand, lowering the Tool 24 has relatively little power because of the weight of the Materials supported this movement. This movement will performed by retracting the actuator 80 so that the tool 24 pivots down about the bolts 60, which the Tool 24 with the parallelogram-shaped connecting means 48 connect, the moving together of the servomotor 80 at the fastest possible and desired speed. The Tool 24 is shown in FIG. 1 with solid lines raised arms 16 in a fully tilted position shown, the angle between the horizontal and the lower reference line of the tool 24 is 90 degrees. This Position can be reached in any position of the arms 16, which is high enough that the tool 24 has its connection means 48 can pivot down without the floor or one touch the underlying obstacle.

Claims (9)

  1. A loader (10) with:
    a) at least one arm (16),
    b) an implement (24) which is indirectly or directly received pivotally by the arm (16),
    c) at least one positioning motor (80),
    d) a guide linkage (27) for parallel guiding of the implement (24) during swinging movement of the arm (16)
    e) at least one connecting means (48) between the implement (24) and the arm (16), to which the arm (16), the implement (24), the positioning motor (80) and the guide linkage (27) are each pivotally connected, and
    f) links (64, 66, 68, 70) which can spread and are connected at one end to the positioning motor (80) and at the other end to the implement (24) and the connecting means (48) respectively.
  2. A loader according to claim 1, characterized in that the connecting means (48) consists of at least one plate (50, 52) whose connections to the implement (24), the arm (16), the guide linkage (27) and one of the links (64, 66) are effected at places which essentially form the corner regions of a square or trapezium.
  3. A loader according to claim 1 or 2, characterized in that the connecting means (48) is formed by two substantially identical plates (50, 52) parallel to one another, which have a space between them and receive an end region of the arm (16) in this space.
  4. A loader according to one or more of the preceding claims, characterized in that the links (64, 66, 68, 70) which can spread each consist of two preferably identical links, which have a space between them and at one end engage the positioning motor (80) on the two sides thereof.
  5. A loader according to one or more of the preceding claims, characterized in that the positioning motor (80) is provided with trunnions (76) on a housing, on which the links (64, 66, 68, 70) pivotally engage, and in that a piston of the positioning motor (80) is pivotally retained by means of a pin (82) in the plates (50, 52) in the central region between the other points of connection of the connecting means (48).
  6. A loader according to one or more of the preceding claims, characterized in that the guide linkage (27) includes a guide member (42) which has two bars (44, 46) running parallel to one another on the end region adjacent the connecting means (48), the bars receiving the plates (50, 52) between them like a fork.
  7. A loader according to one or more of the preceding claims, characterized in that the connecting means (48) are connected directly to brackets (22) of the implement (24) or are connected to the implement (24) through a support (26) with retainers (25).
  8. A loader according to one or more of the preceding claims, characterized in that the positioning motor (80) is extended for loading the implement (24) and the implement (24) is pivoted about a pivotal axis lying separate from the point of attachment of the positioning motor (80) to the connecting means (48).
  9. A loader according to one or more of the preceding claims, characterized in that the guide linkage (27) pivotally engages in an upper middle region of the plate(s) (50, 52), the arm (16) pivotally engages in a lower middle region, a rear link (66) pivotally engages in a rear region and the implement (24) pivotally engages in a front region, wherein the points of engagement form in substance the corners of a quadrilateral.
EP96107712A 1995-05-22 1996-05-15 Loader with parallel motion tool linkage Expired - Lifetime EP0744500B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/445,807 US5533856A (en) 1995-05-22 1995-05-22 Combined loaded self-leveling and implement tilt linkages for effecting true level and enhanced roll back and dump characteristics throughout lift range of loader
US445807 1995-05-22

Publications (3)

Publication Number Publication Date
EP0744500A2 EP0744500A2 (en) 1996-11-27
EP0744500A3 EP0744500A3 (en) 1997-07-23
EP0744500B1 true EP0744500B1 (en) 2002-01-02

Family

ID=23770274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107712A Expired - Lifetime EP0744500B1 (en) 1995-05-22 1996-05-15 Loader with parallel motion tool linkage

Country Status (4)

Country Link
US (1) US5533856A (en)
EP (1) EP0744500B1 (en)
CA (1) CA2173396C (en)
DE (1) DE59608528D1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678979A (en) * 1995-08-01 1997-10-21 Kovacs; Geza Tilt linkage system for load elevating vehicles
GB2340816B (en) * 1998-08-25 2002-10-09 Agco Gmbh & Co Adjustable arm length for front-end loader
US6830112B2 (en) 2001-10-26 2004-12-14 Mtd Products Inc Front hitch system
SE531215C2 (en) * 2004-09-29 2009-01-20 Aaloe Ab Loader comprising two arm parts provided with a space in which hoses / lines are drawn
SE528914C2 (en) * 2004-09-29 2007-03-13 Aaloe Ab Loaders comprising two parallel mounted arm structures which in turn comprise elongated arm portions and parallel bars
US20110150616A1 (en) * 2009-12-17 2011-06-23 Caterpillar Inc Linkage For An Earth-moving Machine
US10544561B2 (en) 2017-12-04 2020-01-28 C.A. Hull Co., Inc. Collector assembly
WO2020047465A1 (en) * 2018-08-31 2020-03-05 Clark Equipment Company Lift arm leveling system
CA3127491C (en) * 2019-01-30 2024-01-02 Clark Equipment Company Mechanical self-leveling lift arm structure for a power machine, in particular a mini-loader
KR20240011136A (en) * 2021-05-21 2024-01-25 두산 밥캣 노스 아메리카, 인크. Self-leveling lift arm assembly of power machinery

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978124A (en) * 1957-10-11 1961-04-04 Gen Motors Corp Cradle loader
US3061117A (en) * 1958-12-11 1962-10-30 Marvin F Kruse Weight gauge for hydraulic loader
USRE29197E (en) * 1959-02-26 1977-05-03 Matbro Limited Shovel loaders
US3080076A (en) * 1959-10-21 1963-03-05 Insley Mfg Corp Loading machine
US3327880A (en) * 1965-08-09 1967-06-27 Baldwin Lima Hamilton Corp Front end loader
US3767075A (en) * 1971-11-22 1973-10-23 Gehl Co Bucket loader
SE387679B (en) * 1975-01-08 1976-09-13 Svenska Hymas Ab LINK AND MOVEMENT SYSTEMS SPECIFICALLY FOR SWINGING TOOLS AS LOAD BUCKETS FOR EXCAVATORS AND THE LIKE
US4674944A (en) * 1985-12-27 1987-06-23 Kidde, Inc. Forklift variable reach mechanism
US4964778A (en) * 1989-07-27 1990-10-23 Kidde Industries, Inc. Forklift truck having a telescopic auxiliary boom articulated to a telescopic main boom
US5238357A (en) * 1989-11-22 1993-08-24 Intermodal Technologies, Inc. Bulk materials transportation system
US5135347A (en) * 1990-03-30 1992-08-04 Kaczmarczyk Edward T Loader mounting
US5150999A (en) * 1990-10-09 1992-09-29 Dugan Joe W Bale lifter and mover
US5387076A (en) * 1993-08-23 1995-02-07 Deere & Company Structure for attaching a loader to a tractor

Also Published As

Publication number Publication date
EP0744500A2 (en) 1996-11-27
DE59608528D1 (en) 2002-02-07
US5533856A (en) 1996-07-09
EP0744500A3 (en) 1997-07-23
CA2173396A1 (en) 1996-11-23
CA2173396C (en) 1999-07-06

Similar Documents

Publication Publication Date Title
DE3048291A1 (en) "EXCAVATOR"
DE3237801C2 (en) Movable cutting machine
DE2922355C3 (en) Equipment unit consisting of an agricultural tractor with three-point hitch and power lift as well as an attachment
EP0744500B1 (en) Loader with parallel motion tool linkage
DE1915825A1 (en) Tillage equipment
EP0063774A1 (en) Implement-attaching device for an agricultural tractor
DE68918456T2 (en) HINGED SYSTEM FOR A LOADER.
DE4013591A1 (en) AGRICULTURAL MACHINE
DE2450807C2 (en) Shovel excavator
DE1484758A1 (en) Hydraulic excavators, in particular bulldozers
DE3043145C2 (en)
DE2357365B2 (en) Boom linkage
DE2013849A1 (en) Backhoe
DE3611432C2 (en)
DE3507682C2 (en)
DE3405502A1 (en) Vehicle with device for picking up, tipping and/or setting down containers or the like
WO1999035344A1 (en) Mobile loading machine with front loading equipment
DE4105287A1 (en) DEVICE FOR VEHICLES AND MACHINES
DE2164623B2 (en) DEVICE FOR BREAKING OUT AN OVEN SHEET
DE2948480A1 (en) Combined shovel loader and fork lift boom - has hydraulic piston and cylinder mountings ahead of and below swivel axis
DE2641309C2 (en) All-terrain chassis for a work device that continuously changes its place of use during its use
DE1949385A1 (en) Loading device
DE2607363C2 (en) Device with elongated leg for deep loosening of soils
DE1101973B (en) Load transport device with walking feet
DE1482043C (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB SE

17P Request for examination filed

Effective date: 19970613

17Q First examination report despatched

Effective date: 19990726

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DEERE & COMPANY

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB SE

REF Corresponds to:

Ref document number: 59608528

Country of ref document: DE

Date of ref document: 20020207

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020328

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140527

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20140530

Year of fee payment: 19

Ref country code: FR

Payment date: 20140519

Year of fee payment: 19

Ref country code: DE

Payment date: 20140423

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59608528

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150515

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150516

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151201

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150601