GB2116012A - Agricultural presser or implement of roll form - Google Patents

Abstract

For working the ploughed or loosened soil there serves an implement of roll form with rotatably arranged elements of ring form. These elements are flanged to one another singly or in groups and thus mounted as complete units on a central frame in rotatable manner. By flanging of elements of ring form to or from one another the implement of roll form can be widened or narrowed according to desire. The connection of the elements of ring form with one another corresponds to that with the central frame, three connection points in each case being provided about midway between the centre point and the outer rim of the ring. Each element is secured to its adjacent element by bolts passing through apertures (25,26) and distance pieces (23,24) on each element (Figures 3,4). <IMAGE>

Description

SPECIFICATION Agricultural presser or implement of roll form The invention relates to a presser or an implement of roll form for working ploughed or loosened soil, consisting of a frame couplable directly or indirectly with the tractor and several rotatably arranged elements of ring form associated with this frame.

Pressers and implements of roll form are used in agriculture as individual implements or in combination with ploughs or other implements in order largely to break up the thick lumps remaining behind on the ground surface in ploughing and/orto reconsolidate the loosened soil to a certain extent. At the same time the most level possible earth surface should be produced. The known pressers and also the implements of roll form have a chassis which centrally carries an axle on which a whole number of elements of ring form, for example presser rings, is rotatably mounted. The presser rings are sharpened to cutting edge form at the edges so that when they roll over thick lumps they cut or crush them into small pieces. The pressers or implements of roll form are attached either directly to the tractor or indirectly to the plough or other implements.The most various forms of embodiment of such pressers and implements of roll form are known (German Publ. Spec. No. 2558 594) and are in use alone or together with ploughs or other implements.

In the known implements it is disadvantageous that their working width is predetermined, so that when existing conditions are different a new implement or an implement modified at great expense is required. Moreover assembly and repair of pressers for example is difficult because if one presser ring is damaged the whole frame with the axle and the presser rings must be taken apart. For this purpose a whole number of connecting screws must be unscrewed before the defective ring is reached. The relatively great constructional expense for associating these presser rings correctly with one another so that they may be drawn behind the plough or tractor is also disadvantageous.Since the known presser rings or other annular elements are mounted rotatably on or with the central axle, it is unavoidable that soil settles between these individual rings, cakes fast there and then is detrimental to the manner of operation of the entire implement, so that for example pressers can no longer penetrate or cut sufficiently deeply into the soil to be worked.

The invention is based upon the problem of producing a presser or comparable implement which can be developed in construction kit manner, is easy to assemble and is operationally reliable.

According to the invention the problem is solved in that the elements of ring form are detachably flanged to one another, singly or by groups, and each unit is mounted rotatably on the frame.

Such an implement, especially a presser thus equipped, can be extended or reduced almost at will by flanging on or unflanging individual rings. The assembly and also the repair of such implements is here substantially facilitated because in each case it is only necessary to unscrew the connecting screws in the region of the damaged ring. In an advantageous manner a central axle has been entirely eliminated, so that the formation of the entire implement can also be substantially simplified and cheapened. At the same time, due to the elimination of the central axle the danger of blockages in the implement can be substantially reduced, because the inner region of the roll remains free and because all rings rotate in common. While it is known in principle to arrange presser rings for example outside a frame(G.B.P.S. 868,394), the known apparatus is part of a towing vehicle and the carrier frame is in itself made similarly to the previously known implements and pressers, except that it is itself connected directly with the tractor. Furthermore the known apparatus has individually rotatable presser rings arranged on the central axle. Thus in principle it has the same disadvantages asthe other known pressers.

Then an expedient connection of the flangedtogether elements of ring form with the frame is provided according to the invention in that the elements of ring form are mounted on a central frame by means of an axle which comprises flanges corresponding with the elements of ring form on one or both sides. By means of these flanges, forming the ends of the axle, the fitting of the elements of ring form is facilitated and at the same time it is ensured that the flanged-together elements of ring form roll uniformly and regularly on the earth surface.

An especially expedient connection of the elements of ring form with one another and with the flanges of the axle is to be seen according to the invention in that the elements of ring form, preferably formed and serving as presser rings, are flanged at three connection points to one another and to the axle. Thus for example the presser receives a favourable and stable formation and the connection of the individual presser rings with one another withstands even great stresses.

Forthe sake of simplicity the invention will be explained further below by reference to a presser, while the features according to the invention can also be realised in fundamentally the same manner on other implements.

In order to guarantee the necessary and desired large free space in the interior of the presser it is provided according to the invention that the connection points are arranged about midway between the centre point and the outer rim of the ring. This arrangement guarantees that the presser can penetrate sufficiently deeply into the soil and break up lumps, since the connections between the individual presser rings are arranged sufficiently far towards the centre point. At the same time the connections between presser rings act in an advantageous manner as a kind of spokes which, in the case of quite coarse lumps, contribute to a division and crushing of these coarse parts.

To facilitate the fitting of the presser rings it is advantageous for the presser rings to have bores at each of the connection points and between them.

Thus a new presser ring can be fitted or a presser ring can be removed readily and without influencing the already existing connection between fitted presser rings. Thus the presser rings are flanged to one another at connection points arranged offset in relation to each other. The arrangement of the bores additionally improves the construction kit principle which is given in an advantageous manner with the solution according to the invention.

It is expedient to arrange distance pieces acting as spacing members and fitted to the connection points, between the individual presser rings. Thus a constant spacing between the presser rings is always guaranteed and at the same time it is made possible to accommodate and arrange the nuts and screws, required for the connection, in protected manner. This is achieved for example in that the distance pieces are widened at the ends to coverthe nuts or screws.

According to a further advantageous development the distance pieces are parts of the presser rings and allocated to one side. The distance pieces thus protruding laterally can have threadings at the free ends so that it is merely necessary for three connecting screws to be pushed and screwed through the presser ring to be connected or attached, in order to fit such a new presser ring, or equally to remove it if necessary. It is also possible to provide correspondingly shorter distance pieces on both sides and then to flange the individual presser rings to one another with the aid of screws of appropriate length.

The central frame is preferably arranged centrally of such a presser. In this case it is expedient to form this central frame as a beam the width of which corresponds approximately to the distance of the individual presser rings from one another. Thus no area uninfluenced or unworked by the presser rings remains in the middle, which contributes advantageously to the regularity of the worked ground surface. It should be mentioned supplementarily that with such a central frame arranged centrally of the presser it is possible to make the presser itself of practically any desired width.

To improve the effectiveness of the pressers it can be necessary or expedient to arrange several such pressers one behind the other, for example to produce what is called a double presser. For this purpose it is provided in an especially advantageous manner according to the invention that two central frames are connected with one another, lying one behind the other, through girders which are attached offset in relation to one another to a transverse member and guided obliquely upward over the outer rims of the rings. Thus the two pressers or presser rolls run offset in relation to one another and partially pushed into one another, so that the second roll becomes effective precisely in the region lying in each case between the presser rings of the leading roll.Thus the two pressers or presser rolls form one working unit, precisely the mentioned double presser, which without extra constructional expense can also be further extended or lengthened in the driving direction. The relatively short overall length of such a double presser consisting of two presser rolls is advantageous.

In order that the distances between the individual presser rings may be kept as short as possible and at the same time that the fitting of the individual rings may not unnecessarily be made difficult, it is provided according to the invention that the flanges, which are made triangular with bores arranged in the corners, are arranged on the ends of the axle and at a distance from the central frame. By reason of the special formation of the flanges the individual presser ring can readily be pushed over these and secured from the other side, namely so that it is then seated between the central frame and the flange.

In the case of pressers consisting of numerous presser rings flanged to one another, the handling and steering of the unit is facilitated according to the invention in that the units mounted in the two sides of the central frame are rotatable independently of one another. This is achieved for example in that one unit on one side is flanged directly to the axle while the other unit is connected with a flange which is rotatable by means of a sleeve on the axle itself.

Thus the manoeuvrability of such pressers is substantially improved.

According to the size of the area to be tilled or worked it can be advantageous to work with very widely projecting presser units. In order to render this possible and to guarantee stability of the entire system, it can be expedient in the case of large units to provide additional central frames arranged externally ortherebetween. These central frames can be connected with one another and with the central frame attached to the tractor.

The invention is especially distinguished in that a prefabricated unit system is produced with which the pressers can be widened, narrowed or lengthened within wide limits according to each utilisation, without new pressers being required. It is merely necessary to flange on or unflange new presser rings in order to obtain the desired width and possibly also length of the presser. By reason of the three-point connection and the special arrangement of the distance pieces the interior space of the presser is kept completely free from machine parts, so that blockages of such pressers or other implements can hardly occur any more, which is advantageous.

Further details and advantages of the object of the invention appear from the following description of the accompanying drawing, in which a presser with the necessary details and individual parts is represented as a preferred example of embodiment, and wherein:- Figure 1 shows a plan view of a presser, partially in section, Figure 2 shows a lateral elevation of the presser, Figure 3shows an individual presser ring in plan view and in section and Figure 4shows a presser ring in lateral elevation.

Figure 1 shows a combined presser 1 with several presser rings merely indicated. The central frame 2 is made as a beam and, as also clarified in Figure 2, carries the axle 3 at the end. This axle 3 possesses flanges 4, 5 arranged on the ends, which are of triangular formation and have bores in the corners, where the connection with the presser rings can be produced with the aid of connecting screws 6, 7.

The central frame 2 is connected with the trans verse member 9 through an obliquely upwardly conducted girder 8, to which member 9 a further girder 10 is articulated which carries the axle 3' and the central frame 11. In the manner as described thus the combined presser is assembled in which the individual presser rings 14, 15, 16, 14', 15', 16' run offset in relation to each other. This implement is called a double presser.

The presser rings 14, 15, 16 run with their outer rims on the ground or cut into the ground. For this purpose the presser rings 14,15, 16 have a sharpened outer rim 17, as illustrated by way of example by the presser ring 14 in Figure 3.

Figure 3 shows a single presser ring 14 with the connection points 20,21,22 arranged about midway between the outer rim 17 and the centre point of the ring. These connection points 20, 21,22 between the individual presser rings 14, 15, 16 as a rule are bores 25,26, through which connecting screws are to be guided. In the example as illustrated on one side 28 of the presser ring 14 there are provided distance pieces 23,24 through which the bores pass and which can have threadings at the free ends in order to facilitate connection with the next presser ring.

For each presser ring 14, 15 or 16 there are provided three such distance pieces 23,24, each fitting the connection points 20, 21,22. Between these connection points 20,21,22 there are provided further bores 26 in order to facilitate the fitting of the next ring, which can be effected without previously releasing the connections in the region of the connection points 20,21,22 and of the bore 25.

Figure 4 shows the presser ring according to Figure 3 in lateral elevation, where it becomes clear how the individual connection points 20,21,22 and bores 25, 26 are arranged as regards their distance from the centre point 18 and outer rim 17 of the ring.

As appears from Figure 1, such presser rings 14, 15, 16 are assembled into units 30,31 and arranged on one or both sides of the central frame 2.

Claims (13)

1. Presser or implement of roll form for working ploughed or loosened soil, consisting of a frame couplable directly or indirectly with the tractor and several rotatably arranged elements of ring form associated with this frame, characterised in that the elements (14,15, 16) of ring form are detachably flanged to one another, individually or by groups, and each unit is mounted rotatably on the frame (2).

2. Presser according to Claim 1, characterised in thatthe annular elements (14,15,16) are mounted on 3 central frame (2) by way of an axle (3) which has flanges (4, 5) corresponding with the annular elements on one or both sides.

3. Presser according to Claims 1 and 2, characterised in that the elements of ring form, formed as presser rings (14, 15,16), are flanged to one another and to the axle (3) at three connection points (20,21, 22).

4. Presser according to Claim 3, characterised in that the connection points (20,21,22) are arranged approximately midway between centre point (18) and outer rim (17) of the ring.

5. Presser according to Claims 1 to 3, characterised in that the presser rings (14, 15, 16) have bores (25,26) at the connection points (20, 21,22) and between them.

6. Presser according to Claims 1 and 3, characterised in that distance pieces (23, 24) fitted to the connection points (20, 21, 22) and acting as spacing members are arranged between the individual presser rings (14, 15, 16).

7. Presser according to Claim 6, characterised in that the distance pieces (23, 24) are each part of the presser rings (14, 15, 16) and allocated to one side (28).

8. Presser according to Claim 1, characterised in that the central frame (2) is made as a beam the width of which corresponds approximately to the distance of the individual presser rings (14, 15, 16) from one another.

9. Presser according to Claim 1, characterised in that two central frames (2, 11) are connected with one another, lying one behind the other, through girders (8,10) which are attached offset in relation to one another to a transverse member (9) and conducted obliquely up over the outer rims (17) of the rings,

10. Presser according to Claim 2, characterised in that the flanges (4,5), which are made triangular with bores arranged in the corner points, are arranged on the ends of th axle (3) and at a distance from the central frame (2).

11. Presser according to Claims 1 and 2, characterised in that the units (30, 31) mounted on both sides of the central frame are rotatable independently of one another.

12. Presser according to Claims 1 and 2, characterised in that in the case of large units (30,31) additional central frames (2, 11) are provided, arranged externally or therebetween.

13. Presser or implement of roll form for working ploughed or loosened soil substantially as herein described with reference to the accompanying drawings.