RU31900U1 - CULTIVATOR KNIFE - Google Patents

Description

R ISHISHIIII MPKA01V15 / 04

CULTIVATOR A knife

The utility model relates to agricultural engineering, in particular, to the knives of cultivators - plane cutters, plows, etc.

A cultivator knife is known (USSR patent No. 1804275 IPC А01В15 / 04, 03.23.93), containing a base with mounting holes and a cutting part including a blade and a chisel-like toe protruding in front of the blade, welded from the hard side from the hard side.

The disadvantage of this knife is the complexity of manufacturing a curly cutting edge. The knife wears out quickly because the cutting edge is located on only one side.

Knife is also known (USSR AS No. 570335 IPC А01В15 / 04, 08/30/07), containing the nose and blade, weld-hard alloy. The nose is made in the form of two stepwise protrusions with cutting blades that are placed perpendicular to the field edge of the knife.

The disadvantage of this knife is that it also has, like the previous analogue, only one cutting edge, which leads to its rapid wear.

Closest to the claimed utility model is a knife (USSR AS No. 1410871 MPK A01B15 / 04, 07.23.88) containing a base in the form of a parallelogram with a number of mounting holes, an overlay fixed along one of the long sides of the parallelogram. On the opposite sides of the knife, cutting edges are made.

The disadvantage of this knife is that the knife has a low operational resource, the complexity of the design and manufacturing technology.

The utility model is aimed at solving the problem of simplifying the design of the knife, the technology of its manufacture while increasing the operational resource.

The problem is solved in that the knife having a base in the form of a parallelogram with cutting edges on its long opposite sides and a number of mounting holes located on one axis, according to the invention, has a second row of mounting holes located on another axis, while the axis of the rows are parallel to each other and are located at an acute angle to the cutting edges so that the distance from the axes to the cutting edges is made increasing in the direction of the acute angles of the parallelogram.

The cutting edges can be made with sharpening angles decreasing in the direction of the acute angle of the parallelogram.

Known to the author of the sources of patent and scientific and technical information, a knife with two rows of bore holes is not described, which allows to increase the knife resource due to the original form of cutting edges, the presence and location of the second row of mounting holes, which in combination allows to increase its operational properties.

The utility model is illustrated by drawings, where in Fig. 1 is a general view of a knife, in Fig. 2 is a knife in a section A-A, in Fig. 3, a cultivator is a plane cutter; figure 4 - knife plow with varying sharpening angles along the cutting edges; in Fig.Z-knife plow in the context of BB Fig.4; in Fig.6 - knife plow in the context of BB In Fig.4.

In the drawings are indicated:

1- cutting edges

2 - fixing holes,

3- right cultivator knife,

4-left cultivator knife,

5 - chisel toe,

6- wear line of the right knife,

7- wear line of the left knife,

8- front surface of sharpening,

9 - the upper plane of the knife,

10 - back surface of sharpening,

11- lower plane of the knife.

The knife contains two parallel equally sharpened cutting edges 1, two rows of mounting holes 2 parallel to each other (Figure 1), located at an angle a to the cutting edges 1.

The cultivator body is a plane cutter (Fig. H) contains two knives: right 3 and left 4, which are placed symmetrically on both sides relative to the protruding chisel toe 5 and are fixed by means of the upper mounting holes 2 to the cultivator body. Fig. 3 shows the wear lines 6 and 7 of the right and left knives, respectively.

Cutting edges can be made with constant grinding angles) and

8 and the upper plane of the knife 9, and y is the angle between the surface of the sharpening 10 and the lower plane of the knife 11. In this case, the sharpening of the knife in the lower part is performed. with a constant angle y, and the sharpening along its upper part is performed with a variable angle, so that it decreases in the direction from the obtuse angle of the parallelogram to the sharp, i.e.

.

The knife works as follows.

In the process of cutting, the chisel-shaped sock 5 protruding in front of the knives 3 and 4 is first introduced into the soil. The highest pressure is formed when cutting in the central zone of the cultivator - a plane cutter, i.e., in the first place, the toe 5 and the cutting edges of the left and right knives adjacent to it on both sides wear out. The implementation on each knife of the mounting holes on two parallel axes located at an angle to the cutting edges and forming sharp angles with them, the sides of which expand in the direction of the direction of the sharp points at the parallelogram angles, allows you to achieve the greatest distance from the cutting edges to the mounting holes in the center of the plane cutter - cultivator knives. In turn, this allows you to increase the knife resource by expanding the allowable wear zone of the knife without increasing the area. The implementation of the knife sharpening along its upper part with a variable sharpening angle /, decreasing in the direction from the obtuse angle of the parallelogram to the sharp, further reduces the energy consumption for overcoming the soil resistance when the knife moves, because a smaller angle has a lower cutting force, which is most significant in the center of the cultivator - a plane cutter.

Such a knife is turned over when one of the cutting blades is worn, and the second cutting blade enters the work.

Claims (1)

A cultivator knife having a base in the form of a parallelogram with cutting edges on its long opposite sides and a number of mounting holes located on one axis, characterized in that it has a second row of mounting holes located on another axis, while the axis of the rows are parallel to each other and are located at an acute angle to the cutting edges so that the distance from the axes to the cutting edges is made increasing in the direction of the sharp angles of the parallelogram, while the cutting edges are made with sharpening angles decreasing in the direction of the acute angle of the parallelogram.