RU220875U1 - UNIVERSAL POINT FOOT - Google Patents

Abstract

The utility model relates to agricultural engineering, namely to the working parts of cultivators for continuous tillage. The universal pointed paw contains a pointed flat-cutting blade with an upper sharpening and a pointed ripping tip connected to it. The flat-cutting blade has a wing width b=50 mm with an opening angle of 70°, an angle α=10° in the section of the paw along the longitudinal axis (Fig. 5), and a crumbling angle β=16°. The pointed ripping tip connected to the flat-cutting blade has the following parameters: wing width b=60 mm, opening angle 70°, angle α=18° in the paw section along the longitudinal axis (Fig. 5), and crumbling angle β=30°. It is ensured that a constant specified tillage depth is maintained during pre-sowing tillage of 50...60 mm, while simultaneously cutting weeds, crumbling and loosening the soil. 1 salary f-ly, 6 ill.

Description

The utility model relates to agricultural engineering, namely to the working parts of cultivators for continuous tillage.

A lancet paw is known, consisting of a lancet tip attached to a stand. The angle of inclination of the blade to the horizontal plane is 23...30°, the opening angle of the blades is 60...65°, the cutting width is 270, 330 mm (Khalansky V.M., Gorbachev I.V. Agricultural machines. - M: KolosS, 2003, p. 73 …76).

The disadvantage of this working body is that the pointed paw can only work stably at a depth of over 80...100 mm, which is not in the optimal range (50...60 mm) when carrying out pre-sowing tillage for grain crops. This leads to the formation of an uneven lower compacted layer of soil, which should serve as the bottom of the furrow when sowing seeds, which in turn will lead to a decrease in yield.

The closest in technical essence is the working body of the cultivator, which includes a lancet ploughshare in the form of a flat lancet knife consisting of two wings, while the lancet ploughshare is made in a step-variable manner (Patent RU No. 156067 Rudenko N.E. et al. / Lancet tillage paw, published 10/27/2015).

The disadvantage of this working body is that it primarily cuts the top layer of soil and the root system of weeds, without intensive crumbling and loosening of the soil, which is a necessary condition for pre-sowing tillage.

The technical result that can be achieved using the proposed utility model is to maintain a constant specified tillage depth during pre-sowing tillage of 50...60 mm, while simultaneously cutting weeds, crumbling and loosening the soil.

The technical result is achieved by the fact that the universal pointed paw is made in the form of a pointed flat-cutting blade with an upper sharpening installed in its front part and a pointed ripping tip connected to it.

The utility model is illustrated by drawings.

Figure 1 is a diagram of the forces acting on the universal pointed paw;

figure 2 is a diagram of the forces acting on a flat-cutting blade;

in fig. 3 - diagram of the forces acting on the pointed ripening tip;

figure 4 is a diagram of a universal lancet paw;

Fig.5 is a section of the paw shown in Fig.4 along the longitudinal axis;

Fig.6 is a cross-section of the wing of the paw shown in Fig.4.

Implementation of a utility model

During operation, the following forces act on the universal pointed paw (Fig. 1): R _p - pressure force on the paw blade, directed at a friction angle ϕ to the normal; I _l is the resultant of soil pressure on the blade. The sum of the forces R _p and R _l (Fig. 2, 3) will give the resultant R, which, in turn, will be decomposed into horizontal R _x and vertical R _z components.

Analyzing the diagram of the acting forces, we can conclude that the total vertical force ΣR _z , which contributes to the deepening of the paw, will tend to a minimum, which means that the universal pointed paw will stably move at a given processing depth.

The universal pointed paw (Fig. 4) includes two wings of a flat-cutting blade 1 with a width b=50 mm with an opening angle of 70°, angle α=10° (Fig. 5), and crumbling angle β=16° (Fig. 6) , connected to the flat-cutting blade, the pointed ripper tip 2 (Fig.4) has the following parameters - wing width b=60 mm, opening angle 70°, angle α=18° (Fig.5), and crumbling angle β=30° (Fig. .6), while the mating of the flat-cutting blade with the ripping tip must be carried out along an arc of a circle with a radius of at least three times the thickness of the tip wing (Fig. 5).

The working process of the universal pointed paw proceeds as follows: when moving the soil-cultivating implement, the flat-cutting blade 1 (Fig. 4) is buried in the soil to a depth of 50...60 mm, cuts off the soil, cutting off the root system of the weeds, and moves it to the wing of the ripper 2, where, due to the developed angle β, crumbling of the soil occurs. Due to the fact that the total vertical force ∑R _z will be minimal, the universal pointed paw will have a stable movement along the depth of tillage.

The proposed universal pointed paw, in comparison with known technical solutions, will allow stable operation while maintaining the required pre-sowing treatment depth of 50...60 mm with its deviation within the established agrotechnical requirements of ±0.01 m.

Claims (2)

1. A universal lancet blade, including a lancet flat-cutting blade with an upper sharpening and a lancet ripping tip connected to it, characterized in that the flat-cutting blade has a wing width b = 50 mm with an opening angle of 70°, an angle α = 10° in the cut of the paw along the longitudinal axis according to figure 5, and the crumbling angle β=16°, connected to the flat-cutting blade, the pointed ripper tip has the following parameters: wing width b=60 mm, opening angle 70°, angle α=18° in the section of the paw along the longitudinal axis according to figure 5 , and the crumbling angle β=30°. 2. The universal pointed paw according to claim 1, characterized in that the mating of the flat-cutting blade with the ripping tip is carried out along an arc of a circle with a radius equal to three thicknesses of the wing of the tip.

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