RU2292696C1 - Cultivator hoe - Google Patents

Abstract

FIELD: agricultural engineering, in particular, technique used in cultivator type tillage tools.

SUBSTANCE: cultivator hoe has holder with attachment members and two cutting plates welded with their ends at an angle to one another and connected to holder. Hoe is equipped with additional lateral reinforcement members rigidly connected to holders and to side of each cutting plate reverse from cutting edge, for example, by welding process. Each lateral reinforcement member for hoe is positioned on cutting plates at an angle of 15-80 deg to horizontal plane depending on angle of inclination of holder end surface to which reinforcing member is connected.

EFFECT: enhanced reliability in operation of cultivator hoe on common and hard soils.

2 cl, 1 dwg

Description

The invention relates to the field of manufacture of working bodies of agricultural implements, in particular to the construction of paws of cultivators.

Known paws of the cultivator, containing a body made in the form of an arrow with two pointed cutting edges located at an angle to each other, and the protruding part is a holder. Wear-resistant material is deposited on the cutting parts - blades. The vertical axis of the holder has holes for attaching the paw. See copyright certificate No. 1701497, 24 V 39/00 of 11/15/08, "Method for hardening metal products."

The disadvantages of the known construction of the legs include the low strength of the cutting blades and the complexity of the technology for their manufacture.

A more perfect construction of the cultivator paw is known - the prototype indicated in the decision on the grant of a patent for an invention according to the application No. 2003106773/12 (007054) dated 03/11/2003. The well-known cultivator paw is made in the form of two plates welded at an angle to each other with sharp cutting edges and wear-resistant material applied to them. The holder is welded to the plates and is made with different wall cross sections, and the section of the holder walls is increased from the edges to the center, and as an embodiment, the cross section of the holder walls can be increased from the center to the edges.

The disadvantages of the known paws of the cultivator include the low strength of the cutting inserts and their destruction at the interface with the holder. The freely located ends of the cutting inserts are consoles pinched at the place of mating with the holder, which during operation of the cultivator paws are affected by bending horizontal-vertical variable loads that lead to a break in the consoles of the cutting inserts.

The objective of the present invention is to eliminate the disadvantages of the prototype, in particular improving the reliability of the legs on conventional and solid soils, as well as when working at a depth of 22 cm

The task set by the invention is achieved by the fact that the cultivator paw is equipped with additional lateral amplifiers rigidly connected to the holder and the side of each cutting plate opposite to the cutting edge, for example, by welding.

Each side paw amplifier is mounted on cutting inserts at an angle of 15-80 degrees to the horizontal plane, depending on the angle of inclination of the end surface of the holder with which the amplifier is connected.

The signs that the cultivator paw is equipped with additional lateral amplifiers, rigidly connected to the holder and the side of each cutting plate opposite the cutting edge by means of, for example, welding, are new, non-obvious, industrially applicable signs and are aimed at achieving the task of increasing the reliability of the paw posed by the invention cultivator on heavy soils and at a depth of up to 22 centimeters under variable loads, constantly affecting the cutting plates of the paw.

The signs of the performance of each side paw amplifier by mounting on cutting inserts at an angle of 15-80 degrees to the horizontal plane, depending on the angle of inclination of the end surface of the holder with which the amplifier is connected, are additional signs that explain and specify the main one and are aimed at achieving the task of increasing the strength of the plates and the reliability of the foot by reducing the console of the cutting inserts. The ability to install amplifiers on cutting inserts at an angle of 15-80 degrees to the horizontal plane allows you to choose the optimal angle of inclination for each version of the inclination of the holder, at which the side paw amplifiers will provide optimal resistance to movement of the cultivator paws.

The drawing schematically shows the proposed paw of the cultivator.

The cultivator paw consists of a holder 1, along the axial line of which holes 2 are made for attaching the paws to the cultivator post, cutting plates 3 and 4, sharpened in front. The holder 1 is formed in such a way that its upper part 5, intended to be connected to the cultivator leg (not shown in the drawing), on which the holes 2 are made, is made obliquely, and the lower part 6 is concave and designed to obtain the largest contact surface of the holder with the end surfaces of the cutting plates 3, 4, which are connected by welding at an angle to each other by the end beveled surfaces along line 7. The holder 1 is welded to the cutting plates 3 and 4. The amplifiers 8 are welded to their side surfaces A and B on the one hand to the end longitudinal surface of the cutting inserts 3 and 4 (surface A), and on the other hand to the holder 1 (surface B). Amplifiers 8 are welded to each end surface 9 of the holder 1. Each amplifier 8 is welded to the plate at an angle to the horizontal of 15-80 degrees - see view along arrow C.

The cultivator paw works as follows: when the cutting inserts are deepened into the soil while moving, the latter begin to perceive constantly changing loads along the entire length due to different soil resistance in horizontal and vertical planes. The loads on the cutting plates of the cultivator's paws depend not only on fluctuations in the depth of cultivation, but also on the contamination of the field, moisture and soil type. For example, loads increase when processing heavy clay soils or when grass and weeds accumulate on the paw holder.

When the load is applied to the cutting inserts 3 and 4, the holder 1 and amplifiers 8 absorb these loads and distribute them along the entire length of the weld. The cultivator paw has two additionally welded amplifiers 8. The impact of loads on the cantilevered protruding parts of the cutting plates 3 and 4 is reduced in proportion to the decrease in the length of the console of the cutting plates, which allows the holder 1 and cutting plates 3 and 4 to work in a lighter mode, which ultimately increases the efficiency of the paws and the cultivator as a whole. Since the amplifiers 8 are welded to the lateral surfaces of the holder 1 at an angle equal to 15-80 degrees, additional conditions are created that increase the strength of the cantilever part of the cutting inserts in two planes of horizontal and vertical and the legs of the cultivator as a whole, as well as the possibility of choosing the optimal regime of soil resistance during cultivator paw work. So, for example, when the cultivator paws work with soils that have (acting) large vertical loads on the cutting inserts, their tilt angle from the indicated 15-80 degrees should be maximum. When working with soils in which the cultivator's paw is affected mainly by horizontal loads, the angle of inclination of the amplifier relative to the horizontal should be minimal. The angle of installation of amplifiers less than 15 degrees and more than 80 degrees does not give tangible advantages in achieving a positive result, which is the object of the present invention.

Currently, the authors have developed working drawings of the paw, made a pilot batch of products of the proposed design, which have successfully passed field tests. Paws showed themselves well in work at various depths and on various types of soils. With a total running time of more than 30 hectares per one paw, none of the paws of the proposed design had any failures in operation, while the prototype paws, when tested under similar conditions, had malfunction of the cutting insert at the interface with the holder.

It was decided to continue the tests and start serial production of the cultivator paws of the proposed design.

Claims (2)

1. The paw of the cultivator, including a holder with fasteners, connected to two end plates welded at an angle to each other, characterized in that the paw of the cultivator is equipped with additional lateral amplifiers, rigidly connected to the holder and the side of each cutting edge opposite the cutting edge by welding. 2. The cultivator paw according to claim 1, characterized in that each side paw amplifier is mounted on the cutting inserts at an angle of 15-80 ° to the horizontal plane, depending on the angle of inclination of the end surface of the holder with which the amplifier is connected.