RU2839004C1 - Subsurface plough working tool - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: subsurface plough working tool includes a toothed post, a thrust bearing, shoe (3) with cutting knives (4) and plate cutting discs (5) with sharpened edges along the circumference, which are fixed on them. Between plate cutting discs (5) to cutting knives (4) chisel-shaped loosening teeth (6) are attached with width equal to distance between circles of plate cutting discs (5), with a projection forward relative to the cutting edges of cutting discs (5) by the value of the radius of said discs (5) and the front working surface in the form of a logarithmic spiral with a positive convex curvature downwards and cutting edges in the form of a logarithmic curve in the horizontal plane.

EFFECT: higher penetration, degree of soil crumbling, reduced traction resistance and longer service life of working element due to redistribution of soil pressure between teeth, discs and blades.

1 cl, 4 dwg

Description

The invention relates to the field of agricultural engineering, in particular to soil-cultivating working bodies for deep non-moldboard soil cultivation.

A soil-cultivating implement ploughshare is known, comprising a blade and pads, which are made in the form of cut cones and fixed with large planes on the upper base of the ploughshare with a pitch equal to one and a half times the width of the base, while the diameter of the large planes of the pad cones is no greater than the width of the ploughshare base, and the height of the pad cones is equal to twice the thickness of the ploughshare base (UA, patent for useful model No. 47260 A01D 29/00. Soil-cultivating implement ploughshare // L.F. Babitsky, B.I. Tarasenko, A.O. Kuvshinov, V.Yu. Moskalevich. Claimed on 17.07.2009, published on 25.01.2010).

Despite the fact that the ploughshare is made with cones capable of additionally crumbling the soil layer, its frontal section has increased and, as a consequence, the traction resistance of the tillage tool has increased. This leads to increased energy consumption of the energy means that aggregate the tillage tool and reduces its productivity.

The closest device of the same purpose to the claimed object in terms of a set of features is the working element of a flat cutter-deep ripper, which contains a heel plate, a shoe, double-sided serrated knives with a replaceable chisel and a stand. The cutting edges of the double-sided serrated knives are made with projections and depressions along a sinusoidal curve with hemispherical crumbling pads. The hemispherical crumbling pads are fixed on the surface of the knives opposite the projections with the location of the axes of the pads at the level of the middle of the width of the knives. The cutting edges of the serrated cutting knife of the stand in the longitudinal-vertical plane are made along an arc of a circle with projections and cutouts along a sinusoid with hemispherical crumbling pads on both sides of the serrated cutting knife of the stand, opposite the projections with the location of the axes of the pads along an arc of a circle at the level of the middle of the width of the serrated cutting knife of the stand. The replaceable chisel on the frontal surface has a removable hemispherical crumbling pad (RU 2571203 C1 Author(s): Leonid Fedorovich Babitsky, Ivan Vitalievich Sobolevsky).

The main disadvantage is the increased traction resistance due to the decrease in the specific pressure of the frontal surface of the crumbling pads of the working element of the flat cutter-deep ripper.

The problem that the claimed invention is aimed at solving is increasing the technical resource of the working element by redistributing the soil pressure between the teeth, discs and knives.

The technical result eliminates the shortcomings identified in the prototype by installing chisel-shaped loosening teeth with a width equal to the distance between the circumferences of the disc-shaped cutting disks with a forward projection relative to the cutting edges of the cutting disks by the radius of these disks and a frontal working surface in the shape of a logarithmic spiral with a positive convexity with downward curvature and cutting edges in the shape of a logarithmic curve in a horizontal plane.

The essence of the invention is as follows.

The specified technical result is achieved by the fact that the working element of the flat cutter-deep ripper, including a toothed stand, a heel plate, a shoe with cutting knives and plate-shaped cutting disks with sharpened edges along the circumference fixed to them, in addition, between the plate-shaped cutting disks, chisel-shaped loosening teeth are attached to the cutting knives with a width equal to the distance between the circumferences of the plate-shaped cutting disks, with a forward projection relative to the cutting edges of the cutting disks by the value of the radius of these disks and a frontal working surface in the shape of a logarithmic spiral with a positive convexity with a downward curvature and cutting edges in the shape of a logarithmic curve in a horizontal plane.

The essential features common with the prototype are: a toothed stand, a heel, a shoe with cutting knives and plate-shaped cutting discs with sharpened edges around the circumference attached to them.

The distinctive essential features are: chisel-shaped loosening teeth attached between the disc-shaped cutting disks, the width of which is equal to the distance between the circumferences of the disc-shaped cutting disks.

The invention is illustrated by drawings.

Fig. 1 shows the working element of a deep-cutting machine, side view.

Fig. 2 shows the working element of a flat cutter-deep ripper, top view.

Fig. 3 and Fig. 4 show sections of chisel-shaped loosening teeth and disc-shaped cutting discs with sharpened edges around the circumference, respectively.

The working element of the flat cutter-deep ripper comprises (Fig. 1) a toothed stand 1, a heel 2, a shoe 3 (Fig. 2) with cutting knives 4 and plate-shaped cutting disks 5 fixed to them with sharpened edges along the circumference, chisel-shaped loosening teeth 6 with a width equal to the distance between the circumferences of the plate-shaped cutting disks with a forward projection, fixed by means of a fastening bolt 7 and the head of the fastening bolt 8. The working element of the flat cutter-deep ripper with a forward projection relative to the cutting edges of the cutting disks by the value of the radius of these disks and a frontal working surface in the shape of a logarithmic spiral with a positive convexity with a downward curvature and cutting edges in the shape of a logarithmic curve in a horizontal plane. The surfaces of the chisel-shaped teeth (Fig. 3) and the disc-shaped cutting disks (Fig. 4) are made according to a logarithmic spiral, which ensures an optimal trajectory of soil convergence from the working elements according to the shape of the soil sliding lines and minimal traction resistance.

The working element of the subsoiler-subsoiler operates as follows. When moving the working element with the stand 1, the heel 2, the shoe 3 in the soil, the chisel-shaped loosening teeth 6 ensure the entry of the paw into the soil due to the concentration of pressure on the soil, and the cutting knives 4 cut the soil layer with plate-shaped cutting discs 5 with sharpened edges along the circumference. Due to the bending moments between the loosening teeth 6 and the plate-shaped cutting discs 5, a rapid and uniform rupture of the soil bonds in the space between the protrusions and depressions occurs. With further movement of the soil layer along the surface of the paw, further crumbling occurs in the longitudinal-vertical plane under the action of alternating forces. Also, the plate-shaped cutting discs ensure a uniform distribution of pressure concentrations on the cut soil layer due to their logarithmic shape. The diameter of the disc-shaped cutting disks 5 is taken to be 120 mm, based on the condition that the pressure concentration lines do not intersect during soil cultivation. The forward extension of the disks is one third of the diameter, based on the condition that the disk is securely fastened to the cutting knives 4.

The use of the proposed working element of the subsoiler-subsoiler increases the technical resource of the working element, increases the depth, the degree of soil crumbling, reduces the traction resistance of the subsoiler due to the redistribution of soil pressure between the teeth, discs and knives.

Claims (1)

The working element of a flat cutter-deep ripper, including a toothed stand, a heel, a shoe with cutting knives and plate-shaped cutting disks with sharpened edges along the circumference fixed to them, characterized in that chisel-shaped loosening teeth of a width equal to the distance between the circumferences of the plate-shaped cutting disks are additionally fixed to the cutting knives between the plate-shaped cutting disks, with a forward projection relative to the cutting edges of the cutting disks by the value of the radius of these disks and a frontal working surface in the shape of a logarithmic spiral with a positive convexity with a downward curvature and cutting edges in the shape of a logarithmic curve in a horizontal plane.

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