DE3107391A1 - Fork-lift device for mounting on agricultural tractors, especially for lifting large hay or straw bales - Google Patents

Description

Stuttgart, February 26, 1981

GUIMA F.LLI GUALDI & C. S.n.c. P 4010 Via Pervilli Zona Industriale Mancasale 42100 Reggio Emilia Italy

Representative:

Kohler-Schwindling-Späth Patent attorneys Hohentwielstraße 41 7000 Stuttgart 1

Fork lifting device for attachment

Farm tractors, especially for lifting large ones Bales of hay or straw

130067/0561 gp ₀ copy

FORK LIFTING FOR ATTACHING TO AGRICULTURAL PEN, ESPECIALLY FOR PULLING LARGE BALES OF HAY OR STRAW.

The present invention relates to a fork lift device for attachment to agricultural tractors., especially for lifting large bales of hay or straw. Fork lifters have long been known, especially for pallets or other objects that are attached to the rear or front of the tractor. These devices basically contain a pair of fixed vertical guide rails along which a movable frame runs, on which in turn a sliding carriage is located, which the fork pipes wearing. The movable frame is lifted by a hydraulic winch, which also lifts a pulley with it which winds a rope, one end of which is attached to the carriage and the other end to the fixed guide rails.

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Thanks to the mechanism mentioned, the fork carriage can double as high as the stretch is the hydraulic The winch goes out and when the forklift is lowered the dimensions remain limited.

The main purpose of the present invention is to provide an apparatus which, although having the same functional concepts and the same advantages are retained, in their structure and in constructive terms, and much simpler is of lower cost.

These and other purposes are achieved by the invention in question, which is characterized in that it as follows: at least one column supported vertically or almost vertically by the tractor, especially by the three-point device of the tractor; at least one second column which is displaceable in relation to and coaxially with the first column is, where one of the two pillars is tubular and the other contains a pillar with a little play, so that one is movable coaxially in correspondence with the other; a tubular runner that is closed around the second column lies and runs along this, and to which a horizontal and transverse beam is attached, holding the fork tips, said tips being horizontal lie and are only a short distance from the ground, when the runner is in its lower position; a 5eil or some other flexible tension element, which with his one end to the runner and the other end to the

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first column is attached, and that is partly a lifting device wraps attached to the upper part of the second column; a hydraulic winch that works with her one End connected to the lower part of the first column and at the other end to the upper part of the second column, the called winch is used to pull one column out of the other.

Further advantages and features of the present invention will become more apparent from the detailed description below some forms of implementation of the device in question, shown purely by way of example and not of limitation in the accompanying drawings, of which

Fig. 1 is a perspective view of the device in question shows in a first embodiment;

Fig. 2 shows a side view of the device of fig. 1;

Fig. 3 shows a view from above of the device of fig. 1;

Fig. 4 shows a perspective view of a second embodiment the device concerned;

Fig. 5 shows a side view of a third embodiment of the device in question;

Fig. 6 shows a top view of the device of Fig. 5. With reference to Figs. 1, 2 and 3, in which a first form of forfeiture is shown, 1 is a-first Column referred to, which had in the vertical or almost vertical position of the three-point device 11 of the tractor 10 will. 2 with a second column is referred to, which is tubular

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is formed and includes the first column. There is a little play between the first and second pillars, so that the second column can move coaxially with respect to the first.

3 with a tubular runner is referred to, which is closed around the column 2 and runs along this. To the Runner 3 is attached to a horizontal and transverse support 4, which carries the two fork tips 5. These tips run horizontally and are a short distance from the Floor when the runner is in its lowest position.

A rope 6 (or other flexible pulling element) is attached at one end to the runner 3 and at the other end to the upper part of the column 1 is. In order to pull out one column in relation to the other, a hydraulic piston winch 7 is provided inside the column 1, which is fastened with one end to the lower part of the column 1 and with the other end to the upper part of the column 2, the column 1 consists of a tubular element with a constant square (or rectangular) cross-section. The column 2 consists of a tubular element, the cross-section of which is also constantly square (or rectangular), but of larger dimensions than the column 1, so that the latter fits into the column 2 in accordance with the dimensions.
Moving one column on the other is made possible by sliding

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bearing favors, for example made of nylon, between the contact surfaces are appropriate.

The rotor 3 consists of a tubular member of short length Length with the same square (or rectangular) cross-section and with larger dimensions than those of the column 2, see above that he can slide on this pillar. This movement is also simplified by sliding bearings that are located between the contact surfaces (e.g. made of nylon).

The carrier 4 consists of two tubular elements 41 which are fastened at the head end to the sides of the rotor 3. Each tip is 5 attached with its rear end to a plate 42, which in turn is attached at its lower part to a ring 43, the closes around each of the elements 41 and the possibility offers to be moved in its position. To fix the mentioned rings 43 in the different positions, that is, to bring the tips closer together or to push apart, different bores 44 are provided on the carrier 4, in which the rings 43 can be pushed in to be attached by pins. To hang the column 1 in the three-point hitch of the tractor is a body 20 is provided, which consists of a tubular element 21 which is fastened in the middle of a second tubular element 22, so that an inverted "T" is formed.

At the three free ends of this "T" there are pins 23 and 24 for hooking into the upper arm and the lower arm two arms of the three-point device 11.

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On the body 20 is one end of a tubular element 25 attached by a short length, while the other end is connected to the lower part of the column 1.

Compared to the first form of realization, the second, which is shown in the Abbildunq 4, the hooking body 20, since here the connection is directly between the three-point device and the lower part of the column 1, that is to say that a pair of lugs 26 are attached directly to the lower part of the column 1 which carry the pin 23 for hooking into the third point, while at the lower end of the column 1 an element 22 is attached directly, which carry the pegs for hooking 24 into the two lower points of the tractor.

In this second embodiment, the runner 3 can through the presence of the lugs 26 do not decrease as much as in the first embodiment, which is why the plates 42 are longer are designed so that the fork tips 5 can touch the ground.

In the figures 5 and 6 a third realization form is shown, in which with the same numbers the same ones Parts are designated, which also the other forms of realization have in common.

In this third form of realization, the column 1 consists of a tubular element with constant square (or rectangular) cross-section, while the second column 2 consists of two tubular elements 12 and 13, which are arranged the same and parallel to each other and a small distance from-

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have each other, and those at the upper ends by a horizontal Pipe of short length connected to each other. These elements 12 and 13 have a constant cross section and the same shape as the column 1, but smaller in size. The column 1 contains the element 12 true to size, see above that this can move along the column 1 and coaxially to this. This movement is facilitated by plain bearings, which can be made of nylon, for example.

The runner 3 is formed from a tubular member of short length, the cross section of which is the same as that of the column 1. This runner 3 is closed around the element 13 and can move along this element and coaxially to it. Said carrier 4 and fork tips 5 are fastened to the rotor 3.

Inside the element 12 said winch 7 is housed, which causes the element 12 to be withdrawn and pushed in relative to the column 1.

The rope 6, which connects the runner 3 and the column 2 with each other, partially wraps around two lifting devices, which are attached to the upper part of the elements 12 and 13. It is hooked into the three-point device of the tractor also in this third embodiment directly between this device and the column 1 in the same way as in the second form of realization, but with the difference that the pins 23 and 24 are pushed as far forward as possible and the carrier 22 consequently below the lower one

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The end of the column I is and the pin 23 is formed from two pins located on the sides of the column 1 (the arm of the third point of the tractor is thus formed be that it includes pillar 1).

The operation of the device concerned is as follows described ways:

When the shaft of the winch 7 is fully inserted, the columns 1 and 2 (or the element 12) are one in the other and the runner 3 in its lowest position. If the shaft of the winch.7 comes out, this has the effect The column 2 is raised and, thanks to the action of the rope 6 and the lifting device (s) 8, the runner is raised 3 along column 2 over a distance that is double the length of the floor.

The three-point device of the tractor is operated and on it it is ensured that the arm of the third point is shorter than the lower arms of the device in question, so this raised backwards at a slight incline. The device in question can be on the tractor at various Set the three-point device to be attached to Example at the rear of the tractor, where only a few design details need to be changed.

Obviously, numerous changes can be made to the invention to be more practical Kind to be attached in the constructive details without however, out of the scope of the inventive idea as claimed to go out "

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Claims (5)

PATENT CLAIMS 1) Fork lifting device for attachment to agricultural tractors, especially for lifting large bales of hay or straw, characterized in that it contains as follows: At least one first column (1) held vertically or almost vertically by the tractor, especially from the three-point Device of the tractor; at least one second column (2) which is movable with respect to the first column and coaxially to it, one of the two columns (I ₁ 2) being tubular and the other column containing a small amount of play so that the one in relation to each other can move coaxially to others; a tubular runner (3) which lies around and can run along the second column (2) and to which a horizontal and transverse support (4) is attached, which supports the tips (5) of the fork, said tips are aligned horizontally and are located at a small distance from the ground when the runner (3) is in its lowest position; a rope (6) 130067/0561 " ^Λ (or another flexible, tension element), which with one end is attached to the runner (3) and with its other end to the first column (I) ₁ and that partially wraps around a Zucjvorrichtunq, which at the top of the second column (2); a hydraulic piston winch (7) which is connected at one end to the lower part of the first column (1) and at the other end to the upper part of the second column (2), the The aforementioned winch is used to pull out one column in relation to the other. 2) Device according to claim 1, characterized in that the first column (I) consists of a tubular element with constant has a rectangular or square cross-section; that the second column (2) consists of an element whose cross-section is constant and that it has the same shape as the first column, but with larger dimensions; the second column (2) contains The first column (1) is dimensionally correct, so that one can be shifted to the other; the lower end the first column (1) is attached to an element which serves to be connected to the three points of the tractor; the rotor (3) consists of a tubular element of of short length, the cross-section of which has the same shape as the first column (1), but of larger dimensions, the named The runner (3) is displaceable along the second column (2); the winch (7) is located inside the first column (1). 3) Device according to claim 1, characterized in that it has a body (20) for he fixed the device on the 130067/0561 "'EPO COPY Contains Trakior, which consists of two tubular elements (21, 22) which are anqecrdnet to each other in the form of an inverted "T" and at the three ends of which there are pins for fastening are on the arms of the three-point hitch of the tractor, one end of a tubular element (25) being attached to said body (20), element of short length, of which other end connected to the lower part of the first column (1) is. 4) Device according to claim 1, characterized in that that on the lower part of the first column (1) a pair of lugs (26) is attached directly, which has a tenon for hooking to carry in the third point of the tractor, and at the lower end of the first column U) is a horizontal and transverse one Pipe element (22) attached, at the ends of which the pins for hooking into the two lower points of the tractor are located. 5) Device according to claim 1, characterized in that that the first column (1) consists of a tubular element with a constant square or rectangular cross-section; that the second column consists of two identical and parallel tubular elements (12, 13) that are spaced a short distance apart lie next to each other and are connected to one another at the upper ends by a short horizontal tube, the named tubular elements (12, 13) have a constant cross-section and the same shape as the first column, but smaller Dimensions than this; EPO GOPY 130067/0561 that the first column (1) contains the first (12) of the said tubular elements, true to size, so that it can be displaced in relation to the column (1);
that the runner (3) consists of a tubular element of short
Length, the cross-section of which is the same as the cross-section of the first column, with the runner along the second
(13) of said tubular elements is displaceable. 130067/0561 EPO COPY _0