WO2005110060A1 - Dispositif de levage monte sur un tracteur pour outillage agricole - Google Patents

Dispositif de levage monte sur un tracteur pour outillage agricole Download PDF

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Publication number
WO2005110060A1
WO2005110060A1 PCT/AU2005/000721 AU2005000721W WO2005110060A1 WO 2005110060 A1 WO2005110060 A1 WO 2005110060A1 AU 2005000721 W AU2005000721 W AU 2005000721W WO 2005110060 A1 WO2005110060 A1 WO 2005110060A1
Authority
WO
WIPO (PCT)
Prior art keywords
lifting device
implement
frame
tractor
lifting
Prior art date
Application number
PCT/AU2005/000721
Other languages
English (en)
Inventor
Martin Hazenveld
Original Assignee
Ibos Pty Ltd
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
Priority claimed from AU2004902664A external-priority patent/AU2004902664A0/en
Application filed by Ibos Pty Ltd filed Critical Ibos Pty Ltd
Publication of WO2005110060A1 publication Critical patent/WO2005110060A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • B62D49/02—Tractors modified to take lifting devices
    • 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
    • A01B73/00—Means or arrangements to facilitate transportation of agricultural machines or implements, e.g. folding frames to reduce overall width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60D—VEHICLE CONNECTIONS
    • B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/14—Draw-gear or towing devices characterised by their type
    • B60D1/141—Arrangements or frames adapted to allow the connection of trailers to tractor three point hitches

Definitions

  • This invention relates to a lifting device for farm implements and in particular to a lifting device for attachment to the rear of a tractor to lift a farm implement which is also attached to the rear of the tractor, so that the tractor can transport the implement between various locations, eg work and storage locations, as required.
  • the lifting device of the invention may be utilised in conjunction with an improved liquid delivery system described in my provisional patent application No 2003903475, the entire contents of which are incorporated herein by reference thereto.
  • my provisional patent application No 2003903475 the entire contents of which are incorporated herein by reference thereto.
  • the invention is not necessarily limited to this particular field of use.
  • Many farm implements are purpose built to function behind a tractor.
  • One such class of implements generally function as they are drawn behind the tractor as it traverses a field, paddock or other region of a farm, the tractor thus pulling the implement behind it.
  • These implements include such devices as ploughs, hoes, weeders, seeders, watering devices, and devices to distribute chemicals including fertilisers and herbicides etc.
  • Other implements however may be used in static locations such as post hole diggers and so forth. Although many of these devices may have "suitable" means such as supporting wheels to allow them to travel over the ground when actually performing their designated task, this is not so with all implements. Even those implements that do have wheels, may have them more for support rather than for travel per se.
  • farm implements are generally only designed for local work rather than travel over longer distances.
  • farm implements are generally used only in relation to the farm that they service (or perhaps a small cooperative of adjacent or nearby farms) and are not intended as a rule to be transported over larger distances, as for example would be required of road making equipment.
  • most farm implements are generally designed for attachment to a multipurpose tractor and not as a free standing implement (as is the case with most roadmaking equipment for example) and are thus simply not designed for travel. Even if it were thought desirable to do so, such means would unnecessarily add to the complexity, and hence weight and cost, of each farm implement.
  • the invention takes on even more usefulness when one considers the general convenience of having improved manoeuvrability with respect to other obstacles as a result of using it.
  • Other obstacles may include for example not only those introduced by man, but those occurring naturally. For example, when it is desired to cross a river, especially where the terrain of the river bed is extremely uneven, it will be found much more advantageous to lift the implement higher than at first might be thought possible with conventional lifting devices.
  • the invention will also be found useful when traversing steep gullies, where again an implement attached to a tractor needs to be lifted higher than normal to allow for the tractor negotiating a steep embankment opposite to the one it has just come down.
  • the invention provides an alternative means of lifting a farm implement attached to a tractor or the like.
  • the invention provides in one broad form, an independent lifting device for mounting to the rear of a tractor having a conventional three point linkage, the lifting device being capable of being mounted in tandem with an implement also attached to the rear of the tractor, the lifting device being movable between a lifting position where it is capable of being connected to and lifting the said implement for travel and the like as described herein and a second non-use position where the lifting device is not connected to the implement and does not interfere with the normal operation of the implement, the device comprising a frame for hinged attachment to the lower pair of linkages of the three point linkage, an upright member hingedly attached at its lower end to a portion of the frame nearer the tractor and hingedly attached in turn at its upper end to one end of a connecting member extending from and hingedly attached at its other end to the upper linkage of the three point linkage, load bearing means extending between the top of the upright member and a portion of the frame remote therefrom, and means to connect the implement to the remote portion of the frame, the lifting and lowering operation of the implement
  • the upright member may be a single member such as a post or it may alternatively be a structure formed from more than one element, for example in the form of a pair of legs forming an inverted V shape.
  • reference to and "end” thereof means respective “ends” of any such divided members
  • the frame of the lifting device may be folded out of the way when not required and is provided with retaining means to retain it in that position to prevent it interfering with the normal operation of the implement.
  • Simple latch means for example may be employed to retain the frame of the lifting device against a suitable portion of the rear of the tractor. It will be appreciated that in fact the frame can be made to fold up to the upright member, if a suitable cross member of the frame is provided at the right location, the upper position of upright member itself being determined by its fixed length connection to the upper linkage. Thus, by providing suitable latch means co-operating between the two, the frame may be restrained against the upright member when not required.
  • the geometry embodied in the invention thus provides the ability to translate and effectively magnify the movement of the three point linkage, specifically the lower pair of linkages thereof, to effect a dramatic lift in the implement. This is achieved by the incorporation of the upright post.
  • the frame is a rectangular frame, although the frame may also be trapezoidal, for example having a smaller side of the frame nearer the tractor and a longer side remote from the tractor. It will be understood that the frame will be symmetrical about an axis extending in the direction of the length of the tractor and that the upright post will thus extend from the centre of the side nearest the tractor.
  • the frame and upright members will be manufactured from suitable hollow metal tubing having a square cross-section, although other profiles may also be suitable.
  • the connecting member extending between the upper linkage and the top of the upright member is preferably high tensile rod and is more preferably fitted with a turnbuckle or other device to allow tensioning and adjustment.
  • This connecting member may in fact be a standard item for use with the top linkage point of a three point linkage for a tractor, and is generally known as a top link.
  • adjustable means may be incorporated in the upright post itself. In this way, coupled with the fact that generally there is adjustment available in the arms and upper linkage point of the tractor itself, the invention is flexible in being applied to tractors having different inherent dimensions for the three point linkage.
  • the load bearing means spanning from the top of the upright member to that portion of the frame remote from the tractor is preferably provided in the form of a pair of high tensile load bearing chains extending from the top of the upright, each chain extending to a point at or near the respective outer comers of the frame, ie remote from the tractor.
  • a dampening device for example in the form of a heavy spring, is located transverse the axis of the frame and towards the side of the frame remote from the tractor, the spring extending between corresponding points on the support or load bearing chains. This allows for up and down movement of the implement as it is transported in the lifted position to be absorbed in a less harsh way than if such dampening were not present.
  • the means to connect the implement to the remote portion of the frame are preferably provided in the form of a pair of lifting chains depending from respective regions at or near the ends of that side of the frame remote from the tractor, the chains terminating in bolts or hooks which may be inserted in suitable receiving means such as holes, eyes or the like located on suitable portions of the implement.
  • a second set of chains is used in a preferred embodiment as cross bracing chains, ie extending from points inboard of the main lifting chains, eg at the centre of that side of the frame or at points intermediate and extending to the same points on respective sides of the implement to which the lifting chains are attached to prevent the implement from swinging widely as it is suspended from the lifting device.
  • each additional bracing chain may be replaced with a spring instead.
  • the device of the present invention easily adjusts to varying geometries for three point linkages of different tractors, wherein the three point linkages have different inherent dimensions.
  • the lifting device according to the invention may be made relatively light weight when compared to a notional single beam arrangement, utilising in effect high tensile chain for those elements which are in tension and tube for those in compression.
  • the lifting device of the invention can be easily located so as to remain on the tractor without interfering with the operation of the implement. It may also be readily removed if required, utilising standard connections for attachment to the three point linkage.
  • the device preferably incorporates suspension means therein to prevent not only bouncing up and down of the implement whilst travelling over bumpy ground, but also helping to eliminate or at least cushion or dampen the sideways swing of the carried implement, which is thus minimised.
  • Figure 1 is a schematic side view of lifting device for an implement attached in tandem therewith to a tractor;
  • Figure 2 is a schematic end view of the lifting device shown in Fig 1;
  • Figure 3 is a schematic side view of the lifting device showing more geometric detail than in Fig 1 ;
  • Figure 4 is a schematic plan view of the lifting device of the previous figures illustrating the dampening spring arrangement
  • Figure 5 is a schematic side view of the lifting device as shown in Fig 4 to facilitate an understanding of how the dampening spring works;
  • Figure 6 is a schematic end view of the lifting device with implement attached illustrating how sideways dampening is achieved
  • Figure 7 is a schematic side view of the arrangement in Figure 6;
  • Figure 8 is a schematic side view of the lifting device of the previous figures in low lift and high lift positions.
  • FIG. 9 is a schematic side view of the lifting device showing how it can be folded up to the non-use position.
  • a lifting device fitted to the three point linkage, 4, 5, and 6 of a tractor.
  • Linkage or pickup points 4 and 5 are located at the outer extremities of lower arms 1 and 2 respectively, which rotate about pivot points 20 and 32 on the tractor, and which may be moved up and down by the tractor.
  • the upper linkage point 6 is a fixed point. Extending however from linkage point 6 is an upper or top link 3 which can be adjusted in length by means of a suitable turnbuckle incorporated therein. Top link 3 is free to rotate about point 6, being hingedly attached thereto.
  • the lifting device comprises a lifting frame 9 connected by support chains 13, 14 which extend from points 15 and 16 on the frame to the top 7 of post 12.
  • the lower point of post 12 is hingedly attached to the side of the frame 9 nearest the tractor and the upper portion of the post 12 is attached at point 7 to the top link 3.
  • the post 12 is shown as a single post, it may alternatively be an inverted V-shape structure, in which case the two lower ends of the legs of the V-shaped structure would be each hingedly attached at appropriate spacing along the side of the frame 9 which is again nearest the tractor.
  • Chains 21 and 22 depend from the lifting frame 9 at 15, 16. Attached at their remote ends are hooks 27, 28 for connection with suitable eyes (not specifically shown) on the implement 10.
  • point 7 rotates about its axis through point 6, causing it to arc towards the tractor, thereby increasing the lifting power or effectiveness and hence ultimately the lift of the implement. Also, because of post 12, and the top link 3, stress on the chains 13, 14 as well as on top link 3 can be controlled, thereby reducing possible accidents due to overstressing the chains or the main frame.
  • the tension in the chains 13 1 , 14 1 in the top position is related to the shortest distance between chain 13 ', 14 1 and point 8, ie the shorter the distance, the higher the tension in the chain.
  • all tractors vary in geometry, especially in relation to where point 6 is in relation to where 20, 32 is), it could be possible that stress in chains 13 1 , 14 1 is getting too high resulting in a larger safety risk when installed with too long a chain 13 1 , 14 l .
  • Figures 4 and 5 show the chain 13, 14 pulled towards each other at 17 and 18 by tension spring 19 which is under load.
  • the spring 19 pull end positions to 17 1 and 18 1 thereby reducing the tension on the chain 13 and 14, thus causing a dampening effect as the effective load varies with the tractor moving over rough terrain.
  • spring 19 effectively dampens the tension experienced in chains 13 and 14, making it possible to lift the implement through the incremental height variation ⁇ H as shown in Figure 5.
  • Figures 8 and 9 show the lifting frame I its operational position (Fig 8) when compared to its non-operational position (Fig 9), where it is disengaged from the implement and folded up to what is effectively an upright position.
  • the lifting frame can be pushed up after it is disconnected to the implement at 27 and 28.
  • the main lifting frame 9 which is relatively light-weight, can be easily pushed up by a single person, thereby slackening the chains 13 and 14 and locked against the upright post 12 by suitable means such as a latch (not illustrated) located on a cross bar 33 of the frame 9.
  • a latch located on a cross bar 33 of the frame 9.
  • the main lifting frame 9 is thereby caused to be located out of the way of the implement, making it possible to use the implement and still leave the lifting device on the tractor.
  • the lifting frame can be lowered by disengaging the latch or restraining device holding it to the post and connected once again to the implement, which may then in turn be lifted up off the ground as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Machines (AREA)

Abstract

L'invention concerne un dispositif de levage pouvant être monté conjointement avec un outil (10) à l'arrière d'un tracteur comprenant un attelage trois points (4, 5, 6). Ce dispositif peut se déplacer entre une position de levage et une position de non-utilisation dans laquelle il n'est pas raccordé à l'outil (10). Le dispositif comprend un cadre (9) pouvant être fixé de manière articulée à la paire inférieure d'organes d'attelage (4, 5), un élément vertical (12) articulé au niveau de son extrémité inférieure sur une partie du cadre (9) au voisinage du tracteur et articulé au niveau de son extrémité supérieure sur une extrémité d'un élément de raccordement (3) s'étendant à partir de l'organe d'attelage supérieur (6) et articulé au niveau de son autre extrémité sur cet organe, des moyens de support (13, 14) s'étendant entre le sommet de l'élément vertical (12) et une partie du cadre (9) distante de ce dernier, ainsi que des moyens (27, 28) permettant de raccorder l'outil (10) à la partie distante du cadre (9).
PCT/AU2005/000721 2004-05-19 2005-05-19 Dispositif de levage monte sur un tracteur pour outillage agricole WO2005110060A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004902664 2004-05-19
AU2004902664A AU2004902664A0 (en) 2004-05-19 Tractor mounted lifting device for farm implements

Publications (1)

Publication Number Publication Date
WO2005110060A1 true WO2005110060A1 (fr) 2005-11-24

Family

ID=35393893

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2005/000721 WO2005110060A1 (fr) 2004-05-19 2005-05-19 Dispositif de levage monte sur un tracteur pour outillage agricole

Country Status (1)

Country Link
WO (1) WO2005110060A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201585A1 (de) * 1982-01-20 1983-07-28 Klöckner-Humboldt-Deutz AG Zweigniederlassung Fahr, 7702 Gottmadingen Nachlaufeinrichtung fuer anbaumaschinen
US5810096A (en) * 1994-07-27 1998-09-22 Defrancq; Hubert Device for controlling a tractor-pushed agricultural implement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201585A1 (de) * 1982-01-20 1983-07-28 Klöckner-Humboldt-Deutz AG Zweigniederlassung Fahr, 7702 Gottmadingen Nachlaufeinrichtung fuer anbaumaschinen
US5810096A (en) * 1994-07-27 1998-09-22 Defrancq; Hubert Device for controlling a tractor-pushed agricultural implement

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