DK163324B - STONE COLLECTION MACHINE - Google Patents

Description

DK 163324B

-1-

The present invention relates to a machine for collecting stones, tubers, lawns and similar objects, in particular from a field, a so-called stone stretcher, of the kind specified in the preamble of claim 1.

5 In GB patent 1,122,435, a stone collector is described in which spring teeth are fixed directly to the rotary shaft and after a twist about an additional shaft extends radially outwardly relative to the shaft. U.S. Patent No. 4,270,614 discloses another type of stone collector having a plurality of arms on the rotary shaft, which arms carry spring teeth of various shapes, e.g. with one or more smaller loops.

15 Common to these well-known stone collectors is that the stone collecting bodies do not possess the necessary ability to yield when they encounter too much resistance, e.g. in the form of large, earthy stones. The elasticity is not good enough, and the stone collecting organs will crack 20 rather than bypass by an elastic deflection. The result is unnecessary downtime and expensive repairs.

By using the machine according to the invention, which is characterized by the characteristic part of claim 1, these disadvantages are eliminated. As the tooth of the non-resilient arm exits in a flat plane spiral or circular web at a certain distance from the axis of rotation, a tremendous elasticity or spring effect in the tooth is obtained, which may be most illustratively compared to the spring action of a cloth clip. This remarkable elasticity enables the tooth to give way to large, earth-free stones without cracking.

The twist of the tooth can be described in that the tooth first extends along a plane, almost circular or helical.

DK 163324 B

lane, and that the tip, possibly. by an opposite directed twist, then oriented largely in the direction of rotation of the shaft.

With this configuration according to the invention, the tooth can extend from arm boats with and towards the direction of rotation. In the latter case, it can be said to assume an almost S-shaped configuration, however, the two arcs in the S need not be "equal in size" (having the same radius of curvature). In the former case it is almost a C-shape. The S-10 shaped configuration as described in claim 2 is preferred as the spring performance in this embodiment is the best.

Advantageously, the machine according to the invention can be designed as claimed in claims 3-5, wherein the arm, which is attached to the shaft and carries the tooth, consists of a plate with a block, the plates further being particularly displaced for each other in the direction of rotation of the shaft and in a particularly advantageous embodiments via the bricks are interconnected so that they extend in a continuous spiral twist around the shaft. This results in the fact that the load resulting from one or more receding teeth is absorbed in the whole plate - the block arrangement rather than just in a single plate with the block. This allows the machine to absorb much larger loads due to the bending of the spring teeth.

25

A particularly advantageous embodiment is given in claim 6, wherein the spring-bearing arms are displaced 60 ° apart, corresponding to six arms with teeth covering a shaft rotation (360 °).

30

Finally, the spring teeth may advantageously be provided with replaceable tooth tips, cf. claim 7, since the tooth tips wear out faster than the rest of the tooth, and since one can only replace a tooth tip instead of 35 for a whole tooth.

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DK 163324 B

As the machine according to the invention is propelled forward, the shaft is in a known manner imparted a rotation about its own axis, whereby the spring teeth attached to the arms scan the underlying substance at a certain depth for stones and similar objects which are collected and brought to the surface. where they are delivered to one or more conveyor belts or chains, which can simultaneously serve to size the collected items and to which the stone paver is connected in known manner or which is part of the machine. The shaft of the final conveyor belt runs parallel to the direction of travel, so that the collected stones are laid in a string in the direction of travel or collected in a carriage via a conveyor. The machine may also comprise a tuber crusher (to reduce the size of the tuber).

15

The machine is particularly useful for tilling soil in which you want to put potatoes, onions, carrots and other row crops. While driving, the machine cleans the soil at a suitable width and depth, for example 1.50 m x 0.30 m, 20 and lays out strings of stones at appropriate intervals, such as may correspond to the distance between the used wheels of the vehicles, whereby in addition to the stone removal, a better supporting surface for these wheels is also obtained. Furthermore, the stones lying in the strands absorb the heat of the sun, which is transferred to the 25 sides of the intermediate bed, thereby accelerating germination and growth altogether.

The invention will be explained in more detail in connection with the drawing, which illustrates various embodiments of the machine according to the invention, and in which fig. 1 shows an end view of a rotor shaft with arms and spring teeth according to the invention; FIG. 2A-2D detail cross-sectional views of the same, for the sake of clarity only one arm 35 with associated spring tooth in various embodiments according to the invention is shown;

DK 163324 B

FIG. 3 is an end view of a rotor shaft with circular cut-out plates and for clarity only one spring tooth with interchangeable tooth tip; and FIG. 4 is a perspective view of a shaft with plates and bricks in a continuous spiral winding.

In FIG. 1 is an end view of one embodiment of a machine according to the invention comprising a shaft 1 which is arranged to rotate in the direction of the arrow P and is driven forward in the driving direction K. To the shaft 1 a number of arms 2 are secured. near their free end carries a spring tooth 3 which extends from the point of attachment into a large, plane almost circular or helical web, e.g.

15 as shown 180 ° around the shaft opposite to the direction of rotation P, after which the free end 5 of the spring tooth is caused by a bend or a crack to point approximately in the direction of rotation P of the shaft.

This second bend can result in an almost circular path, which, however, need not be as large as the first path.

The spring tooth 3 can be attached to the arm 2 in many ways, e.g. welded, screwed, bolted or via a special bushing.

In FIG. 2A-2D are detailed cross-sectional views of a shaft 1 with a plate 6 and a block 7, the course 30 of the spring tooth 3 being shown in four different embodiments of the invention. In FIG. 2A and 2B are shown a nearly S-shaped course where the spring tooth from the point of attachment of the arm extends towards the direction of rotation, and in FIG. 2C and 2D are shown closest to the C-shaped course, where the spring tooth exits with the direction of rotation.

DK 163324 B

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FIG. 3 shows an end view as in FIG. 1, but with circular sectional plates 6 and for reasons of clarity only one spring tooth 3 with interchangeable tooth tip 8. The tooth tip 8 may be attached to the tooth 3 itself in a variety of ways 5 well known to those skilled in the art.

In FIG. 4 is a perspective view of a particular embodiment of the machine according to the invention, namely the embodiment in which the rotary shaft 1 carries a number of circular sectional shaped plates 6 displaced 60 ° apart in the direction of rotation of the shaft and each plate 6 near its end opposite the shaft 1 carries a nearly rectangular plate or block 7 which extends in a plane substantially perpendicular to the plane of the plate 6, and which is also analogously attached to the adjacent plate 6 '. A spring tooth 3 is indicated attached to a globe 7.

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Claims (7)

1. Machine for collecting stones, earthen tubs, lawns and the like while driving. comprising a transverse driving direction (K) arranged (1) arranged to be rotated by the propulsion means of the machine and carrying a plurality of arms (2) carrying a prominent spring tooth (3), characterized by: the spring tooth (3) projects from the point of attachment to the arm (2) in a plane, almost circular or helical, and that the free end (5) of the spring tooth (3) points approximately in the direction of rotation of the shaft (1). 10 Machine according to claim 1, characterized in that the spring tooth (3) from the point of attachment to the arm (2) extends first opposite to the direction of rotation (P) in a plane, almost helical path, and then with the direction of rotation 15 (P) along a near circular path. in the same plan. Machine according to claims 1-2, characterized in that the arm (2) consists of a plate (6) attached to the shaft (1) which carries near its free end a block (7), to which the spring tooth (3) is fixed. Machine according to claim 3, characterized in that the plates (6) with the bricks (7) are spaced apart in the direction of rotation of the shaft (P) and that each bracket (7) 25 is fixed to two adjacent plates (6,6). ') so that the plate-block system proceeds as a continuous coil - twisting about the shaft (1). Machine according to claims 3-4, characterized in that the plate (6) is in the form of a circular section and the block (7) is a rectangular plate extending in a plane substantially perpendicular to the plane of the plate (6). . Machine according to claims 1-5, characterized in that the 35 arms (2) are so displaced from each other in the direction of rotation (P) of the shaft (1) that each arm (2) is turned 60 ° in relationship to the previous one. Machine according to claims 1-6, characterized in that the springs (3) are provided with interchangeable tooth tips (8). 10 15 20 25 30 35