RU221784U1 - KNIFE-CHISEL FOR SUB-RIPPER - Google Patents

Abstract

The utility model relates to agricultural engineering, in particular to the working bodies of subsoilers. A knife-chisel for a subsoiler includes a base with fasteners and two jumper plates made at an angle to each other, and a curved plate with a front and rear cutting edge, wherein the jumper plates are located in the space between the fasteners and are made at an angle to each other , and on the working parts of the knife-chisel, surfacing is made of a wear-resistant alloy. The technical result consists in extending the service life of the knife-chisel when loosening the soil.

Description

The utility model relates to agricultural engineering, in particular to the working bodies of subsoilers.

Loosening without turning over preserves the organic composition of the soil, and as a result, promotes long-term fertility. With this method of soil cultivation, the drainage properties of deep layers are improved and the oxygen content in the soil increases.

The knife-chisel destroys deep layers of soil and allows oxygen and useful substances to penetrate deeper into dense soil.

A subsoiler bit is known from the prior art (RF patent for invention No. 2532971, IPC A01B 15/00, A01B 35/20, A01B 39/20 publ. November 20, 2014), made in the form of a plate. The outer surface of the plate has a deposited layer with a thickness of 0.1-0.8 of the plate thickness and a length of 2-20 of the plate thickness, in the direction from the working end along the bit plate. The deposited layer, along with other elements, contains 1.0-6.5% carbon and 2.5-45.0% chromium by weight.

The disadvantage of this technical solution is that the bit is fastened with screws from the side of the working part of the knife, which leads to abrasion of the screws.

The closest analogue is a chisel (RF utility model patent No. 179169, IPC A01B 35/20, published on May 3, 2018), made of steel and having a sharpened cutting edge, mounting holes, characterized in that the chisel is made of one-piece sheet metal 30KhGSA steel 22 mm thick in the form of a body with mirror-arranged cutting edges, the sharpening angle of which is 19°, while the body is made in the form of a rectangle 195 mm long and 70 mm wide, the working surface is deposited with T590 electrodes to a hardness of 59.0 HRC, non-working surface heat-treated to a hardness of 40 HRC, on which two brackets for fastening to the working body stand, made of steel, are welded. 20 8 mm thick, and each of which has two milled elliptical holes, the distance between the centers of which corresponds to the distance between the centers of the working body rack seats, the working surface is located relative to the body at an angle of 165°.

The disadvantage of this technical solution is that the bit is fastened with screws from the side of the working part of the knife, which leads to abrasion of the screws. In addition, an insufficiently reliable design for attaching the knife to the stand under high loads can lead to displacement of the knife relative to the stand.

The technical problem that the utility model is aimed at solving is increasing the reliability of the subsoiler.

The technical result achieved by the utility model is to extend the service life of the knife-chisel when loosening the soil.

The technical result is achieved by the fact that a knife-chisel for a subsoiler includes a base with fasteners and two jumper plates made at an angle to each other, and a curved plate with a front and rear cutting edge, and the jumper plates are located in the space between the fasteners and are made at an angle to each other.

The utility model is further illustrated by the following drawings:

Fig. 1. General view of the knife-chisel design

Fig. 2. Sectional view of section A-A of the knife-chisel structure

Fig. 3. Sectional view of the B-B section of the knife-chisel structure

The chisel knife is made of 40X alloy steel and includes a base 1 with fasteners 2 and two jumper plates 3, made at an angle to each other, and a curved plate with a front and rear working part 4. The sharpening angle of the working part is 12-14° . The working surface is located relative to the central part at an angle of 155-170°. The knife-chisel is the main part of the subsoiler structure, which takes on the main load, and is made with a central flat platform and upwardly curved end platforms with working parts. The working bodies of tillage agricultural machines are operated in an abrasive environment and wear out intensively, changing their shape and size. Therefore, to increase the durability of the working surfaces of tillage knives, surfacing of wear-resistant material is used. The working part of the knife-chisel has a surfacing 5 made of a wear-resistant alloy, which increases strength and durability when operating the device on high-density soils. Surfacing 5 is carried out by a welding robot, which allows the material to be uniformly applied to the surface of the cutting edge of the knife. Surfacing wire is designed to improve surfaces that require increased abrasion resistance. The deposited layer on unalloyed steel provides a surface hardness of 55-60 HRC.

In a particular case, the working parts of the knife-chisel can be made without surfacing from a wear-resistant alloy.

In a particular case, surfacing can be made of the material "ITALFIL IT-600", hardness 55-60 HRC, thickness 2-4 mm.

In a particular case, surfacing can be made of wear-resistant material T-590 (sarmite).

Also, to increase reliability and durability, the knife-chisel is covered with a protective coating.

In a particular case, the coating can be made of AC-1154 primer enamel. Coating thickness 80 microns.

The knife-chisel is fastened from the side using spring cylindrical split pins into one of the holes on each side. This type of fastening provides protection against abrasion during loosening by eliminating protruding elements.

The mirror arrangement of the working parts 4 on the body of the knife-chisel ensures an extension of the service life of the knife-chisel, since when one working part 4 wears out, the chisel turns around and the work is carried out by the other cutting edge, and also, the shape of the knife prevents it from moving and “sliding” in the process plowing the soil. The knife-chisel is easily reinstalled by dismantling the spring cylindrical split pins after wear on one side.

The presence of jumper plates 3, forming an angle of 26° and located in the space formed between the fastening elements 2, provides a more reliable fixation of the knife-chisel on the subsoiler stand, fixing it on the stand and preventing its displacement and loss during plowing of coarse soil layers. The angle between the jumper plates depends on the shape of the rack and is selected in such a way as to ensure unhindered fastening of the knife to the rack and at the same time prevent it from moving during operation.

To install on a subsoiler, the knife-chisel is inserted through the end of the stand and its central flat platform is placed on the front end of the stand with emphasis on the step, while the jumper plates 3 of the knife-chisel are placed in a recess at the rear end of the stand, additionally preventing the knife-chisel from moving relative to the stand during operation. The knife-chisel is secured through one of the holes 6 on each side of the rack.

The creation of two working parts 4 of the knife-chisel and its fastening using cylindrical spring split pins allows you to quickly change the direction of installation of the knife-chisel without significant equipment downtime.

In this case, the knives are disconnected by knocking out cylindrical spring split pins.

Claims (5)

1. A knife-chisel for a subsoiler, including a base with fasteners and two jumper plates made at an angle to each other, and a curved plate with a front and rear cutting edge, wherein the jumper plates are located in the space between the fasteners and are made under angle to each other. 2. Knife-chisel according to claim 1, characterized in that its working parts are located at an angle of 155-170° to the central part. 3. Knife-chisel according to claim 1, characterized in that the working part is made with a sharpening angle of 12-14°. 4. Knife-chisel according to claim 1, characterized in that the working parts of the knife-chisel are made of a wear-resistant alloy. 5. Knife-chisel according to claim 1, characterized in that the working parts of the knife-chisel are made of a wear-resistant alloy without surfacing.