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WO2016206908A1 - Ensemble de support pour un outil agricole - Google Patents

Ensemble de support pour un outil agricole Download PDF

Info

Publication number
WO2016206908A1
WO2016206908A1 PCT/EP2016/061923 EP2016061923W WO2016206908A1 WO 2016206908 A1 WO2016206908 A1 WO 2016206908A1 EP 2016061923 W EP2016061923 W EP 2016061923W WO 2016206908 A1 WO2016206908 A1 WO 2016206908A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
assembly
carrying assembly
mower
frame
Prior art date
Application number
PCT/EP2016/061923
Other languages
English (en)
Inventor
Thomas Doell
Original Assignee
Agco Feucht Gmbh
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 Agco Feucht Gmbh filed Critical Agco Feucht Gmbh
Priority to EP16724918.4A priority Critical patent/EP3310148A1/fr
Publication of WO2016206908A1 publication Critical patent/WO2016206908A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
    • A01B59/06—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors
    • A01B59/064—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines mounted on tractors for connection to the front of the tractor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/14—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors
    • A01B63/24—Tools or tool-holders adjustable relatively to the frame
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/64—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • A01D34/66—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle with two or more cutters
    • A01D34/661—Mounting means
    • A01D34/662—Mounting means to the front of the vehicle

Definitions

  • This invention concerns a carrying assembly for attaching a tool to an agricultural machine. More specifically the invention concerns a mower carrying assembly for attachment to the front of an agricultural tractor.
  • a mower is typically attached to the front a tractor by a carrying assembly which is fitted to a three point hitch on a tractor.
  • the three point hitch can hold the mower at a desired height.
  • the carrying assembly may be provided with contact wheels to support some of the weight of the mower on the ground and to assist the mower in maintaining the same cutting height when moving over different contours of the ground.
  • the carrier assembly When the mower is not in use, it must be carried by the tractor in a transport position in which it is held in a raised position high above the ground.
  • the carrier assembly must be provided with adequate compensation or suspension means to prevent unnecessary movement of an attached mower when travelling in the transport position.
  • Compensation or suspension means are also required during mowing, when the mower is in a lowered position to enable the mower to move independently of the tractor and carrier assembly and allow the mower to follow uneven ground and thus mow grass evenly. Without adequate compensation, or suspension means, undesired movement of the assembly and mower (in a vertical and/or horizontal direction) will reduce the stability of the tractor which may become unsafe and dangerous to operate.
  • Known carrying assemblies for carrying a mower located at the front of a tractor comprise a carrier frame which is attachable to an agricultural machine. Two member are pivotally suspended from the carrier frame and are pivotally attached to a mower forming a four bar linkage. This permits limited vertical movement of the mower when travelling over uneven ground and with such simple four-bar kinematics, the space between the lowest and highest positions of the mowing position is often not large enough to compensate for uneven ground. As a result, when travelling over a depression in the ground, or downhill the assembly will not permit the mower to be lowered sufficiently for the mower to mow the grass.
  • the carrier assembly may not be able to move the mower sufficiently high enough, with the result that the mower and/or part of the assembly comes into contact with the ground causing damage to the mower and/or carrier assembly and/or tractor. This is especially true when the tractor is equipped with a suspended front axle.
  • the mower may alternatively, or additionally be attached to the rear of the tractor to mow grass at the side of the tractor.
  • a tractor When a tractor is fitted with a rear mower it is necessary to ensure an even cutting coverage is achieved both in terms of grass height cut by the front mower and the length of grass overhang at the side which is cut by the rear mower.
  • the constant mowing of both mowers should be maintained even when travelling around curves. It is known to provide a rear mower carrying assembly comprising a four bar linkage with ball joints to permit transverse movement of the mower within the assembly and wherein the transverse movement can be controlled by means of a hydraulic cylinder.
  • a carrying assembly for attaching a tool to an agricultural machine, said carrying assembly comprising a carrier frame mountable to an attachment block on the machine and a sub frame suspended from the carrier frame by two links, wherein each link is pivotally attached at opposing ends to the carrier frame and the sub frame respectively to form a first four bar linkage, characterised in that said sub frame forms a second four bar linkage when a tool is attached to the assembly, said second four bar linkage comprising two members pivotally attached between the tool and the sub frame and wherein movement of either of the four bar linkages results in movement of the other four bar linkage to adjust the height of the tool above the ground.
  • the height of the tool above the ground can be easily controlled and the tool is maintained in a steady position since the assembly will try to maintain an equilibrium positon in which the tool is held in a substantially horizontal position with respect to the ground.
  • the second four bar linkage comprises two rockers connectable between the tool and the sub frame.
  • connections of the first four bar linkage are ball joints or cardan joints which permit transverse displacement of the carrying assembly.
  • the carrying assembly can thus be moved transverse to the direction of travel as well as vertically with respect to the ground.
  • a control element extends between the carrier frame and one of the links of the first four bar linkage to control transverse displacement of the carrying assembly.
  • the control element preferably comprises a hydraulic cylinder.
  • a control rod extends between the carrier frame and the sub frame or rocker to control the height of the tool above the ground.
  • the tool is preferably a mower.
  • the carrier assembly is preferably a front mounted carrier assembly for attaching a mower at the front of a machine.
  • Figure 1 is a side view of a carrying assembly in accordance with the invention attached to an agricultural machine
  • Figure 2 is a perspective view of the carrying assembly in accordance with the invention
  • Figure 3 is an exploded perspective view of figure 2.
  • FIG. 1 shows a side view of a front part of a tractor 15 fitted with a typical three point hitch 16 comprising two lower links 16a and a top link 16b.
  • the forward direction of travel of the tractor 15 is indicated by the arrow.
  • a carrying assembly la for carrying a front mounted mower unit 6 is shown.
  • the carrying assembly la comprises a carrier frame 1.
  • Carrier frame 1 is generally a rotated "I" shape frame comprising two parallel legs lb and two longitudinal members lc which are fixedly connected at right angles to legs lb.
  • the carrier frame 1 is attached to the tractor by means of a mounting block.
  • the mounting block is an "A" frame having two supporting legs which are each attached to the two lower links 16a.
  • the apex of the "A" frame is connected to the top link 16b.
  • the frame 1 is positionally fixed relative to the mounting block, so that there is no relative movement between the block and the frame 1.
  • Legs lb extend in a generally vertical manner when the carrier frame 1 is mounted to the tractor 15.
  • Longitudinal members lc are longer than legs lb and are fixedly connected at right angles to legs lb, so that when frame 1 is fitted to the tractor 15, the longitudinal members lc extend in a generally horizontal manner in the direction of the forward direction of travel of the tractor.
  • the extremities of longitudinal members lc are slanted in a downwards direction.
  • Longitudinal members lc are fixedly connected to each other by transverse member Id as show in figure 2.
  • a further transverse member (not shown) connects the extremities of longitudinal members lc.
  • Figures 2 and 3 show the components of the carrying assembly la in greater detail in which the tractor has been omitted.
  • a perspective view of the carrying assembly la is shown.
  • an exploded perspective view of figure 2 is shown in which lifting cylinders 10, 11 and springs 12, 13 have been omitted.
  • broken lines indicate the connections between the different parts.
  • a sub frame 2 comprising an essentially elongate member, is suspended from carrier frame 1 at either end by two links 3,4 which are connected to the extremities of each longitudinal member lc of carrier frame 1. Links 3 and 4 are pivotally connected at either end so that a first four bar linkage is formed.
  • the joints of the first four bar linkage comprise the joint between link 3 and sub frame 2, the joint between link 4 and sub frame 2, the joint between link 3 and the carrier frame 1 and the joint between link 4 and the carrier frame 1.
  • Sub frame 2 is suspended so that its longitudinal axis is transverse to the direction of travel of the tractor.
  • a further link 5 also extends between the mid point of sub frame 2 and the mid point of transverse member Id of carrier frame 1. Links 3 and 4 bear the tension forces and link 5 bears the compressive forces.
  • a mower unit 6 comprising a number of rotary mowers is connected to the sub frame 2 by an upper rocker 7 and a lower rocker 8.
  • Mower unit 6 is provided with a central attachment member 6a for connection to the rockers 7, 8.
  • Rockers 7 and 8 each comprise two parallel arms 7a, 7b and 8a, 8b respectively.
  • the arms 7a, 7b of upper rocker 7 are positioned closer together than the arms 8a, 8b of lower rocker 8.
  • the arms of 8a, 8b are longer than the arms of 7a, 7b.
  • An end of each arm 7a, 7b is each connected to the mower unit attachment member 6a.
  • the opposing ends of arms 7a, 7b are connected to a centrally protruding portion 2a (see figure 3) of sub frame 2. All connections of the rocker 7 allow pivotal movement of the rocker 7 relative to both the mower unit attachment member 6a and sub frame 2 about axes which are transverse to the direction of travel.
  • rocker 8 is fitted below rocker 7. An end of arm 8a, 8b is each connected to the mower unit attachment member 6a. The opposing ends of arms 8a, 8b are connected at, or close to each end of sub frame 2. All connections of the rocker 8 allow pivotal movement of the rocker 8 both relative to the mower unit
  • rocker 7 and rocker 8 provide a second four bar linkage in which the four joints comprise the connection between rocker 7 and the mower unit attachment member 6a, the connection between rocker 7 and sub frame 2, the connection between rocker 8 and sub frame 2 and the connection between rocker 8 and mower unit attachment member 6a.
  • the carrier assembly links 3, 4 and 5 extend between the carrier frame 1 and sub frame 2 and slant downwards from the carrier frame 1 towards the tractor 15, that is in a direction opposite to the direction of travel.
  • Rocker arms 7a, 7b, 8a, 8b extend from the sub frame 2 to the mower unit attachment member 6a in a direction away from the tractor 15, that is in the direction of forward travel.
  • Lifting cylinders 10 and 11 are arranged in parallel and are connected between the carrier frame 1 and each end of sub frame 2.
  • the cylinders 10,11 work in one direction only and are used to raise and lower the mowing unit from a working positon to a transport position. Contracting the cylinders raises the mower 6 away from the ground. Extending the cylinders lowers the mower towards the ground.
  • Springs 12 and 13 are connected parallel to the lifting cylinders 10, 11 and act as suspension means.
  • sub frame 2 forms a part of both the first and second four bar linkages, movement of either of the four bar linkages (first or second), for example, when travelling over uneven ground will cause movement of the other linkage.
  • the mower 6 is maintained in a steady position since the assembly will try to maintain an equilibrium positon in which the mower 6 is held in a substantially horizontal position and rocker arms 7a, 7b, 8a and 8b are substantially horizontal with respect to the ground.
  • Rod 9 is a rigid control rod and connects the sub frame 2 to the carrier frame 1.
  • the position of the sub frame 2 relative to the carrier frame 1 is dependent on cylinders 10, 11 and rod 9.
  • the position of sub frame 2 affects the relative movement of the first and second four bar linkages and thus affects the height and vertical movement of the mower above the ground.
  • the invention further provides a means for shifting the mower 6 in a transverse direction relative to the direction of travel.
  • the transverse direction is indicated by the arrow in figure 2.
  • a control element 14 comprising a hydraulic cylinder extends between link 3 or link 4 and the carrier frame 1 and acts as a means to displace the mower 6 transversely of its central position when mowing further to one side of the tractor is required.
  • Control element 14 also acts a suspension means to centrally re-position the mower 6 when the assembly la is transversely shifted due to travel over rough ground.
  • transverse displacement means movement of the mower 6 in a direction transverse to the direction of travel of the machine.
  • the connecting joints of the carrier assembly la of the first four bar linkage are provided with ball, or cardan joints.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Harvester Elements (AREA)
  • Agricultural Machines (AREA)

Abstract

L'invention concerne un ensemble de support (1a) pour attacher un outil (6) à une machine agricole (15). L'ensemble de support (1a) comprend un châssis porteur (1) pouvant être monté sur un bloc de fixation sur la machine (1) ; un sous-châssis (2) suspendu au châssis porteur (1) par deux liaisons (3,4), où chaque liaison (3, 4) est attachée de manière pivotante à ses extrémités opposées au châssis porteur (1) et au sous-châssis (2), respectivement, de manière à former une première tringlerie à quatre barres, caractérisé en ce que ledit sous-châssis (2) forme une deuxième tringlerie à quatre barres lorsqu'un outil (6) est attaché à l'ensemble (1a), ladite deuxième tringlerie à quatre barres comprenant deux éléments (7a, 8a/7b, 8b) attachés de manière pivotante au niveau d'une extrémité à l'outil (6) et au niveau de l'autre extrémité au sous-châssis (2) et où le mouvement de l'une ou de l'autre des tringleries à quatre barres engendre le mouvement de l'autre tringlerie à quatre barres pour régler la hauteur de l'outil (6) au-dessus du sol.
PCT/EP2016/061923 2015-06-22 2016-05-26 Ensemble de support pour un outil agricole WO2016206908A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16724918.4A EP3310148A1 (fr) 2015-06-22 2016-05-26 Ensemble de support pour un outil agricole

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1510919.2A GB201510919D0 (en) 2015-06-22 2015-06-22 Carrying Assembly for an Agricultural Tool
GB1510919.2 2015-06-22

Publications (1)

Publication Number Publication Date
WO2016206908A1 true WO2016206908A1 (fr) 2016-12-29

Family

ID=53784293

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/061923 WO2016206908A1 (fr) 2015-06-22 2016-05-26 Ensemble de support pour un outil agricole

Country Status (3)

Country Link
EP (1) EP3310148A1 (fr)
GB (1) GB201510919D0 (fr)
WO (1) WO2016206908A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11206759B2 (en) 2017-11-21 2021-12-28 The Toro Company Mower quick height of cut adjustment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456900A2 (fr) * 1990-04-27 1991-11-21 Alois Pöttinger Maschinenfabrik GmbH Machine agricole
DE29501467U1 (de) * 1995-01-31 1995-03-30 Gießler, Matthias, 77933 Lahr Tragvorrichtung für Anbaugeräte von Arbeitskraftfahrzeugen
DE4437587A1 (de) * 1993-10-27 1995-05-04 Freudendahl J Fab As Verbindungsvorrichtung
EP0876748A1 (fr) * 1997-05-06 1998-11-11 Kuhn S.A. Appareil ou machine comportant une unité de travail articulée par rapport à une structure porteuse et procédé d'articulation
EP1321022A1 (fr) * 2001-12-21 2003-06-25 Kverneland ASA Chassis de support pour faucheuse
EP1593294A1 (fr) * 2004-05-06 2005-11-09 Alois Pöttinger Maschinenfabrik GmbH Dispositif d'accouplement pour faucheuse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0456900A2 (fr) * 1990-04-27 1991-11-21 Alois Pöttinger Maschinenfabrik GmbH Machine agricole
DE4437587A1 (de) * 1993-10-27 1995-05-04 Freudendahl J Fab As Verbindungsvorrichtung
DE29501467U1 (de) * 1995-01-31 1995-03-30 Gießler, Matthias, 77933 Lahr Tragvorrichtung für Anbaugeräte von Arbeitskraftfahrzeugen
EP0876748A1 (fr) * 1997-05-06 1998-11-11 Kuhn S.A. Appareil ou machine comportant une unité de travail articulée par rapport à une structure porteuse et procédé d'articulation
EP1321022A1 (fr) * 2001-12-21 2003-06-25 Kverneland ASA Chassis de support pour faucheuse
EP1593294A1 (fr) * 2004-05-06 2005-11-09 Alois Pöttinger Maschinenfabrik GmbH Dispositif d'accouplement pour faucheuse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11206759B2 (en) 2017-11-21 2021-12-28 The Toro Company Mower quick height of cut adjustment

Also Published As

Publication number Publication date
EP3310148A1 (fr) 2018-04-25
GB201510919D0 (en) 2015-08-05

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