RU31899U1 - Manual cultivator - Google Patents

Description

Manual cultivator

The utility model relates to small agricultural implements, and in particular to hand tools for tillage.

It is known that a “Gardening and gardening tool containing a sharpened elongated curved at right angles blade and a handle cut at the end of the blade (see Utility Model Certificate No. 15623“ Gardening and Gardening Tools, Application No. 2000109472 of 17.04.2000) is a prototype.

The disadvantages of the known device are:

- the rectilinear cutting edge of the blade is unable to balance the torque that occurs during operation, relative to the longitudinal axis of the handle;

- insufficient angle of adjustment of the inclination of the cutting plane relative to the longitudinal axis of the handle;

- the location of the plane adjacent to the handle of the working body relative to the cutting syuskost does not allow the effect and obviously the second cutting edge;

-sharpening of the cutting edge from the bottom reduces the efficiency of the tool in many operations;

- laborious readjustment of guns;

- lack of effectiveness of the mounting bracket, it is intended; significant for hardening the handle and its durability.

The purpose of the proposed utility model is to eliminate these shortcomings due to changes in design, expanding the functionality of the tool, reducing physical effort when performing agricultural work.

The utility model is illustrated in FIG. 1, 2, 3 where before the orule is located, ie. pos. 1 - working body;

3- metal nozzle;

as well as geometrical and parameters forming the profile of the working body R, r are the bending radii and L are linear sections in the cutting plane in the following proportions:

-the lower part of the blade L is equal to 2 .. .4R;

- the central point of attachment of the blade to the handle is located at a distance of LI 0 ... 0.5R in the horizontal and L2 1.5 ... 3R in the vertical planes from the point of constant position of the generatrix of the profile;

At all six points of fixation, the blades are arranged in pairs at a distance of 1.-, 0.5 ... 2 R from each other, with the center between them at the point of intersection, summer to the handle;

- the distance between the centers of the bending radii of the working hour of the blade i. 0 ... 0.5R;

 ° C 6A01B, 1/06

the blade at the point of contact with the handle has a rectangular cross-section A-A with thickness H 0.05 ... 0, IR, and the rest of the blade (section BB) has three-sided sharpening with an angle of 20 ° -30 °;

the end of the working part of the blade is wedge-shaped with an angle at the apex of 20 - 40 °;

angles of attack (angles between the direction of motion and the tangent to the cutting edge at a given point) a and a are variable and

respectively, a - 90 - arctgf (x} and or, 90 - arcii / (.v).

The working body consists of a curvilinear with a variable width and: generally 10 degrees on three sides of blade 1, one end of which is bent along a helical line with the formation of a platform for attaching the handle 2. The radius of bending of the blade R, the ratio of its geometric parameters, including width and thickness - design parameters and are selected depending on the purpose of the tool and the types of work. The forward-mounted platform for attaching the handle and light, with a wide range of readjustment, make it possible to effectively use both cutting edges for work on heavy soils - hilling, cutting large weeds, etc. The use of a metal nozzle at the end of the handle allows to provide increased strength and durability of the handle even when using the insument as a ketmen, pickaxe, deep loosening hoe, etc.

The proposed tool can be successfully used when loosening the soil, forming beds, cutting grooves for sowing seeds, weeding weeds, hilling various plants, mowing and uprooting weeds and grass, sowing hay, etc.

Claims (9)

1. A manual cultivator containing a sharpened curved blade at a right angle and a handle mounted on the end of the blade, characterized in that the blade is made in the form of a tapering variable curvature and sharpened on three sides of the plate, fastened with a handle and curved along a helical line with certain radii at an angle (-20) - (+40) ° to the longitudinal axis of the handle. 2. The cultivator according to claim 1, characterized in that the cutting edges of the blade of variable curvature with defining variable angles between the direction of motion and the tangent at a given point are α = 90 ° - arctan f '(x) and α ₁ = 90 ° - arctgf' ₁ (x). 3. The cultivator according to claim 1, characterized in that the flat part of the blade is 2 to 4R. 4. The cultivator according to claim 1, characterized in that the distance between the generatrix radii is 0 - 0.5R. 5. The cultivator according to claim 1, characterized in that the bending radius between the plane of attachment to the handle and the working part of the blade is 0.1 - 0.5R. 6. The cultivator according to claim 1, characterized in that the point of attachment of the blade to the handle is located at a distance of 1.5 - 3R in the vertical and 0 - 0.5R in the horizontal planes from the point of construction of the generatrix profile. 7. The cultivator according to claims 1 and 6, characterized in that the six fixation points are in pairs at the same distance from each other, equal to 0.5 - 2R, and the attachment point is in the center between them. 8. The cultivator according to claims 1 and 7, characterized in that the blade with a thickness of 0.05 - 0.1R at the point of contact with the handle has a rectangular cross-section, and the rest of the blade has a three-sided sharpening with an angle of 20 - 30 °. 9. The cultivator according to claims 1 and 6, characterized in that the attachment to the handle is carried out through a metal nozzle made along the profile of the handle.