RU215877U1 - WORKING BODY OF THE SOIL-CLOWING TOOL - Google Patents

Abstract

The proposed utility model relates to soil-cultivating implements, and more specifically, to harrows using spherical cut-out discs on autonomous racks.

The technical result of the present utility model is to reduce the cutting force while increasing the stability of the workflow.

The technical result is achieved due to the fact that the knife blade and the cutting edge of the cutouts of the disk have serrated sharpening.

The working body of the soil-cultivating tool, containing a rack with a bracket, a bearing assembly, a spherical disk with cutouts and a cutting device resiliently and tightly pressed against it from the inside, consisting of a cutting element in the form of a crescent-shaped knife with a cam safety mechanism, moreover, the knife blade and the cutting edge disc cutouts have serrated sharpening.

Description

The proposed utility model relates to soil-cultivating implements, and more specifically, to harrows using spherical cut-out discs on autonomous racks.

Known working body tillage tools [Author's certificate RU patent No. 74543, IPC class. А01В 21/00, 2008], containing a rack, a bearing assembly, a spherical disk with cutouts, and a cutting element fixed motionless on the rack and / or bearing assembly and made in the form of a steel plate, front in the direction of the tool, the cutting part of which is made along a curved line concave into the body of the plate, for example, a sickle-shaped one, in such a way that when the top of the sickle meets the beginning of the rear part of the disc cutout, the sickle-shaped plate closes part of the disc cutout area in which crop residues, such as stems, are clamped, and when the disc rotates, the plate and disc, making relative to each other, oncoming movement, they cut the stubble residues captured in the lock by the type of ticks.

The disadvantage of this utility model is poor chopping and stubble residues by cutouts of the disc, caused by pressing the residues into the soil and bending them without cutting, as well as the fact that when a stone enters the cutting pair, the disc and the cutting element break.

The closest analogue to the claimed is the working body of the tillage tool [Author's certificate RU patent No. 198533, IPC class. А01В 21/08, А01В 23/00, А01В 35/18, 2020], the working body of a soil-cultivating tool, containing a rack with a bracket, a bearing assembly, a spherical disk with cutouts and a cutting device elastically and tightly pressed against it from the inside, consisting of a cutting element in the form of a sickle-shaped knife with a cam safety mechanism.

The disadvantage of this design is the high cutting force. The smooth sharpening of the knife blade and the cutting edges of the disk does not allow to achieve a significant reduction in the cutting force of the roots and crop residues of plants. Elastic stems and roots of plants are poorly cut when pressed by a smooth blade, they are captured by the cutouts of the disk, dragged through the soil, and collected in a bundle in the cutouts of the disk. Such tufts are cut with great force by the knife and the cam safety mechanism of the knife may be triggered.

The technical result of the present utility model is to reduce the cutting force while increasing the stability of the workflow.

The technical result is achieved due to the fact that the knife blade and the cutting edge of the disc cutouts have serrated sharpening.

The specified set of essential features ensures the appearance of the inventive working body of the tillage tool of new properties that are different from the prototype.

Thus, the claimed features of the utility model meet the criterion of "novelty".

In FIG. 1 shows a diagram of the working body of a soil-cultivating tool, explaining its functioning, in Fig. 2 - view A in Fig. 1 serrated knife sharpening.

The working body of the soil-cultivating tool, containing the rack 4 with the bracket 6, the bearing assembly 7, the spherical disk 9 with cutouts 3 and the cutting device resiliently and tightly pressed to it from the inside, consisting of a cutting element in the form of a sickle-shaped knife 8 with a cam safety mechanism, moreover, the knife blade and the cutting edge of the disc cutouts have serrated sharpening.

The proposed working body tillage tools works as follows.

The working body is preliminarily, with the help of a rack 4 and a leash 5, fixed on the transverse beams of the harrow frame. The working bodies are displaced relative to each other both in a row, and each row is displaced relative to the previous row in such a way that each disk has its own strip of land for processing. Several dozens of working bodies are installed on the harrow frame.

The harrow is towed by a tractor across the field and disks 9 rotating on bearing assemblies 7 carry out tillage.

On the field there are plant residues of the predecessor, for example, corn or other tall crops, perennial grasses, etc. Cutouts 3, disk 9, capture the stems of plant residues, press them into the soil, partially cut them, and the uncut ones are moved to knife 8.

The stalk captured by the notch 3 and pressed into the soil moves by the rotating disk 9 towards the cutting edge of the knife 8, is captured according to the pincer pattern, pinched and cut.

The proposed design of the cutting device allows the cutting element, when the hardness of the cut material changes, to overcome the pressing force from the side mounted on the lever 2 of the elastic bracket of the cam fuse and perform angular vibrations around the axis 11, due to which the cutting force is reduced.

Each disc cut repeats the work of the previous cut.

The cut plant residue remains in the soil, which contributes to its rapid transformation into organic fertilizer.

When pinched in the cutting pair of the beam of plants 10, the force on the knife 8 increases dramatically, creating a torque relative to the hinge 11 mounted on the shoulder 12 of the elastic bracket 1 of the cam safety mechanism. At the same time, the cam 14, mounted on the handle of the knife 8, overcoming the pressing force from the side of the cam 13, the elastic bracket 1 of the cam safety mechanism deflects the shoulder 12 and provides angular vibrations of the knife relative to the axis 11.

Between the set of essential features of the utility model and the achieved technical result, there is the following causal relationship.

Serrated sharpening 15 of the knife blade 8 and the cutting edge of the cutouts 3 of the disk 9 are most suitable for cutting soft and elastic objects that are easily squeezed when cutting. Such items are crop residues and plant roots. The cutting of stubble residues and plant roots by the curved cutting edge of the disk cutouts and the blade of the oscillating knife occurs with reciprocating sliding along the blade. Sliding cutting in combination with serrated sharpening of cutting elements leads to a decrease in cutting force.

Reducing the cutting force leads to a decrease in the likelihood of opening the cam safety mechanism of the knife and to an increase in the stability of the process.

Sources of information:

1. Author's certificate RU patent No. 74543, IPC class. A01B 21/00, 2008.

2. Author's certificate RU patent No. 198533, IPC class. A01B 21/08, A01B 23/00, A01B 35/18, 2020.

Claims (1)

The working body of the tillage tool, containing a rack with a bracket, a bearing assembly, a spherical disk with cutouts and a cutting device resiliently and tightly pressed against it from the inside, consisting of a cutting element in the form of a crescent-shaped knife with a cam safety mechanism, characterized in that the knife blade and the cutting edge of the cutouts of the disc have serrated sharpening.

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