RU2577910C1 - Harrow flexible multi-link - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machine building, particularly, to harrows for surface treatment of soil with preservation of the mulching layer. Multi-link flexible harrow comprises a frame composed of telescopic rods, made in the shape of square cross-section pipes. Executive element in the shape of a multi-link line loop is installed on the frame with the help of brake couplings. Line loop links are detachable in the form of a round-section tube element, to which there are welded angles with process holes for installation of teeth with detachable connection. Lone loop links are connected between themselves by means of lugs.

EFFECT: such design will allow to increase operational reliability of the harrow, ensures high quality of soil processing with preservation of the mulching layer.

1 cl, 3 dwg

Description

The invention relates to agricultural machinery, in particular to a harrow for surface tillage while preserving the mulching layer.

A flexible harrow is known, comprising a transverse beam, a longitudinal bar and a chain cable connected with it with loosening teeth, as well as a connecting element. The harrow is equipped with a mechanical winch with a double cable and with a ratchet mechanism, mounted and fixed on a longitudinal rod of increased rigidity. Under the rod there is a rotary spring strut and a support rotary wheel (see patent RU 2200374, IPC A01B 19/02, publ. March 20, 2003).

Known chain loop, including a hitch and a chain, which consists of individual segments interconnected by intermediate hinges. On the links of the chain loop with the help of a clamping screw, strips with paired segments that have curly cuts are fixed at the top and bottom (see patent RU 2268560, IPC A01B 19/02, published on January 27, 2006).

Known flexible harrow N.I. A homeless, containing a transverse beam with a chain loop fixed on it, made in the form of links with loosening teeth. The harrow is also equipped with a rack and circular knife that is rigidly fixed to the transverse beam (see patent RU 2028031, IPC A01B 19/02, published 09.02.1995).

However, all of the above solutions have a working body in the form of a chain loop, on the links of which segments or teeth are fixed. During operation, the chain loop copies the surface of the soil, large boulders and lumps, which causes uneven processing along the length of the loop. In addition, winding up plant debris can lead to a “rolling” of a valuable plume.

Closest to the presence of similar essential features and adopted for the prototype is a flexible harrow containing a frame made of telescopic rods, a swivel bracket, a brake clutch and a multi-link train with loosening teeth (see patent RU 2050081, IPC A01B 19/02, publ. 20.12 .1995 g.).

The main disadvantage of the known flexible harrow is the low operational reliability associated with limited maintainability of the working body in the field. In case of tooth breakage, the replacement of the entire chain loop is required. In addition, when teeth are pulled onto solid soil, the chain links are moved relative to each other, thereby not ensuring uniformity of penetration of all teeth into the soil, which leads to chain “rolling” and a decrease in the quality of soil cultivation. During the operation of the harrow, the chain links wear out, and there is a need for a complete replacement of the chain loop.

The problem to which the invention is directed is to improve the design in order to increase the operational reliability of the harrow and improve the quality of the soil tillage while preserving the mulching layer.

The problem is solved in that in the harrow a flexible multi-link, containing a frame made of telescopic rods, a swivel bracket, a brake clutch and a multi-link train with loosening teeth, the loop links are made detachable in the form of an element of a steel pipe of circular cross section, onto which four squares with technological openings for installing teeth with collapsible connection, telescopic rods are made in the form of square tubes with a movement mechanism.

In FIG. 1 presents a General view of the claimed harrow flexible multi-link;

in FIG. 2 shows a general view of a loop link;

in FIG. 3 is a view A of FIG. 2.

The flexible multi-link harrow contains a frame consisting of telescopic rods 2 and 4, made in the form of square tubes. The rod 2 is inserted into the rod 4 through the movement mechanism 3. The rotary arms 1 and 5 are welded to the arms in the direction of travel of the gun. On the rods 2 and 4, additional arms 6 and 8 are welded to attach additional sections. On the rods 2 and 4 from the side opposite to the movement of the implement, brake couplings 7 and 9 are installed, which serve to secure the ends of the multi-link cable 10. The links of the cable 10 are made detachable in the form of an element of a steel pipe 13 of circular cross section, onto which four squares 14 with technological holes are welded for installing teeth 15 with collapsible connection. The links of the loop 10 are interconnected using the eyes 11 and 12, which are installed on the teeth of the link.

Harrow flexible multi-link works as follows.

Before starting work, the tension of the multi-link harrow plume is adjusted depending on the physical and mechanical state of the surface being treated. When the harrow moves along the field, the teeth 15 of the links of the plume 10 are embedded in the soil and begin to rotate it. Rotating links mulch the surface of the soil, eliminate the over-compacted crust, destroy lumps and lumps.

The design of the loop links, made in the form of an element of a steel pipe of circular cross-section, makes it possible to better level the surface of the soil, ensuring high-quality and uniform processing along the entire length of the loop. Squares 14, welded to the pipe, provide structural rigidity, participate in the destruction of soil lumps, and also prevent the winding of plant debris on the links.

Due to the presence of removable eyes 11 and 12, the replacement of links and teeth 15 of the harrow can be done in the field without dismantling the entire loop. In addition, the prostate design of a flexible multi-link harrow allows it to be manufactured in the repair shops of agricultural enterprises, which eliminates the purchase of expensive chain cables. This increases the operational reliability of the harrow.

The proposed technical solution is most effective when using zero tillage technologies.

Claims (1)

A flexible multi-link harrow containing a frame made of telescopic rods, a swivel bracket, a brake clutch and a multi-link plume with loosening teeth, characterized in that the plume links are detachable in the form of an element of a steel pipe of circular cross section, onto which four squares are welded with technological holes for installation teeth with collapsible connection, telescopic rods are made in the form of square tubes with a movement mechanism.

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