RU231815U1 - Cultivator's paw - Google Patents

Abstract

The utility model relates to agriculture. A cultivator paw comprises a holder, two wings and a replaceable attachment in the form of a pair of steel strips rigidly fixed to each other at an attack angle of the cultivator paw. The strips are sharpened on both sides to form a blade, and through oval holes are made in them for fastening to the holder and moving as they wear out. In turn, holes are also made on the surface of the holder for fastening the steel strips by means of a bolted connection. The strips are made with the possibility of turning them over after the blade wears out on one side so that the second, not yet worn, blade of the strip performs its purpose during further use. After reaching the limit state of both blades of the strips, they are replaced. Creation of a cultivator paw with an increased resource is ensured. 2 fig.

Description

The utility model relates to agricultural engineering, in particular to working bodies of soil-cultivating implements.

In order to increase the resource of cultivator paws and to minimize downtime of soil-cultivating units during repair and maintenance, many technologies and methods for strengthening and restoring these working elements have been developed. There are also positive research results in this area related to solutions in the field of developing an optimal design of a cultivator paw. All the analyzed developments have, to a greater or lesser extent, both disadvantages and advantages.

A method for restoring working parts is known [1], based on the fact that the worn edges of the cultivator paw are leveled and a sharpened and hardened by electrolytic borating corner plate made of low-carbon steel is welded to them.

A number of authors have also proposed a method for restoring the arrow-shaped paws of cultivators [2], which involves removing the worn part of the paw and making a replaceable corner plate from medium-carbon steel. The plate is sharpened and strengthened, and through holes are drilled in it to allow it to move as it wears out. The plates are attached through threaded holes in the paw.

The disadvantage of these methods is that the authors do not assume the possibility of reusing the cultivator paw base after the welded corner plate wears out. In addition, the replaceable plate is made in the form of an angular element, which cannot ensure turning over and using cutting edges on both sides in order to increase their service life, which will entail, in turn, unjustified sending of parts worn out on only one side, as well as the cultivator paw bases to scrap metal.

Also known from the prior art is a rotary cutting device [3] with disc rotors on which knives are installed, consisting of a base with pads on both sides. The pads are sharpened on both sides and turned over after one cutting edge wears out, while the non-working cutting pad serves as a balancing and spare.

The disadvantage of the design is that the authors assume the use of the proposed working element only for rotary cutting units of mowers.

The closest of the analogues is the design of a cultivator paw [4] with a replaceable attachment in the form of steel strips fixed together. The attachment is attached by combining grooves made in the paw with protrusions on the replaceable attachment with fixation by jumpers.

The disadvantage of this design is that the main objective of the authors was only to reduce the traction resistance of the unit and increase economic efficiency, and the goal associated with increasing the resource of the paws was not set.

The task that the utility model is aimed at solving is to create a cultivator paw with an increased resource.

The technical result is achieved in that the cultivator paw, containing a holder, two wings and a replaceable attachment in the form of a pair of steel strips rigidly fixed to each other at an angle of attack of the cultivator paw, is manufactured in such a way that the strips are sharpened on both sides to form a blade, through oval holes are made in them for fastening to the holder and moving as they wear out, on the surface of the holder, in turn, holes are also made for fastening the steel strips by means of a bolted connection, while the strips are made with the possibility of turning them over after the blade wears out on one side so that the second, not yet worn blade of the strip fulfills its purpose during further use, and after reaching the limiting state of both blades of the strips, they are replaced.

The utility model is illustrated by drawings.

Fig. 1 shows a holder 5 with worn edges 1 of a standard design paw that are subject to alignment. Also, holes 2 with a diameter of 8...12 mm are made in the holder, which are intended for fastening the attachment to the holder using bolts, nuts and washers.

Each strip 7 of the attachment is sharpened to form blades 3 on both sides (Fig. 2). For fastening to the paw holder 5, at least two oval openings 8 with a diameter of 5 mm are made in the strips 7 of the attachment, on each side with an axis of symmetry parallel to the axis of symmetry of the paw holder 5.

When securing the attachment to the holder with a threaded connection, a welded connection 4 is made at the junction of the nose parts of the left and right strips 7 to prevent the strips from bending during soil cultivation.

Unlike existing designs [1, 2, 4], the replaceable strips 7 of the attachment are turned over 180 degrees as the blade 3 wears out on one side (shown in Fig. 2 by a circular arrow), and then the strip 7 of the attachment performs its function with the unworn blade on the opposite side. The worn part of the blade 6 no longer performs its original function. The same is done with the second strip, and in the nose part they are again attached to each other by a welded joint 4.

Only after both blades of each of the two installed strips 7 of the nozzle are worn out, they are sent to scrap metal. In this case, the holder 5 of the paw is used for its intended purpose and further when installing new prepared strips 7 of the nozzle on it. The proposed design will not only increase the service life of the paw, but also reduce labor costs and funds for their restoration, minimize sending worn-out working parts to scrap metal and reduce equipment downtime during repairs.

Since the holes 8 in the strips 7 of the attachment are oval, they will be used not only for fastening to the paw holder 5, but will also ensure the movement of the replaceable strips as their blades wear out, compensating for the amount of wear. The direction of movement of the strips 7 (Fig. 2) as their blades 3 wear out is indicated by arrows.

A worn out cultivator paw is used as a holder. The dimensions, material and other parameters of the strips are set in accordance with similar characteristics of the paw used for a specific cultivator brand.

The claimed utility model will increase the service life of cultivator paws, minimize the number of worn-out working parts sent to scrap metal, and reduce equipment downtime during its operation.

ANALOGUES OF THE INVENTION

1. Russian Federation Patent 2241586. IPC B23P 6/00. Method for restoring parts of tillage machines / V. N. Builov, I. V. Lyulyakov. Patent Holders: V. N. Builov, I. V. Lyulyakov. – Application No. 2003127933/02, filed 16.09.2003; published 10.12.2004, Bulletin No. 34.

2. Russian Federation Patent No. 2467857. IPC B23P 6/00; B23P 9/00. Method for restoring arrow-shaped cultivator paws / V. N. Buylov, I. V. Lyulyakov, V. S. Eremenko, A. S. Kovalchuk, R. M. Kosachev. Patent Holder: N. I. Vavilov Saratov State Agrarian University. – Application No. 2011113591/02; declared 07.04.2011; published 27.11.2012, Bulletin No. 33.

3. Russian Federation Patent 54717. IPC A01D 34/63. Rotary cutting device / R. A. Kornilovich, V. A. Ksendzov, N. V. Byshov, D. N. Byshov. Patent Holder: Federal State Educational Institution of Higher Professional Education RGSHA named after prof. P. A. Kostychev. – Application No. 20051333683/22; declared 31.10.2005; published 27.07.2006, Bulletin No. 21.

4. RF patent 216216. IPC A01B 35/20; A01B 35/26. Cultivator's paw / B. Kh. Akhalaya, N. I. Belyaeva, S. V. Semichev, V. V. Gromov. Patent holder: FGBNU FNATS VIM. – Application No. 2022126553, application. 10/12/2022; publ. 01/23/2023, bulletin. No. 3.

Claims (1)

A cultivator paw comprising a holder, two wings and a replaceable attachment in the form of a pair of steel strips rigidly fixed to each other at an angle of attack of the cultivator paw, characterized in that the strips are sharpened on both sides to form a blade, through oval holes are made in them for fastening to the holder and moving as they wear out, on the surface of the holder, in turn, holes are also made for fastening the steel strips by means of a bolted connection, while the strips are made with the possibility of turning them over after the blade wears out on one side so that the second, still unworn blade of the strip fulfills its purpose during further use, and after reaching the limiting state of both blades of the strips, they are replaced.