RU214193U1 - The working body of the chain harrow - Google Patents

Abstract

The utility model relates to agriculture. The working body of the chain harrow is made in the form of chain loops with loosening elements made in the form of pairwise mutually oppositely directed teeth. On the one hand, the teeth are tapered and connected to the plate on the other side by means of a collapsible threaded connection. The plate is rigidly fixed in the inner space of the link of the chain train. Two nuts are rigidly fixed to the plate on both sides, into which the teeth are screwed. Pairs of teeth on each link are arranged coaxially. Improvement of the quality of tillage is provided. 2 ill.

Description

The utility model relates to agricultural engineering, in particular to tillage working bodies designed for loosening the soil, removing weeds and leveling the field surface.

Known is the working body described in the utility model patent "Chain harrow" (utility model patent of the Russian Federation RU 157737 U1, application dated 01.07.2015, IPC A01B 21/04), according to which, the chain harrow contains a frame with welded racks of the bearing assembly to front beam of the frame, and movable rear racks with bearing assemblies located on the cantilever beams of the frame. Between the front bearing assembly and the corresponding rear bearing assembly, chains with rigidly fixed teeth are stretched, and the chains are located on a rigid frame to the left of the motion vector at an angle of 45 degrees in the amount of 3-4 pieces in parallel, and symmetrically to the right. The teeth of the chain element at the ends have a cut at a right angle. The teeth of the chain element have a sharp taper at the ends of the teeth.

The disadvantages of the described working body are the complexity of the design, high metal consumption, difficulty in maintenance and repair.

Known working body of a chain harrow, described in the patent for the invention "Dvurechensky chain harrow" and taken as a prototype (patent for the invention of the Russian Federation RU 2499377 C1, application dated 18.06.2012, IPC A01B 21/00), according to which the chain harrow contains a supporting frame on which the working bodies are fixed with the possibility of rotation in the form of chain loops with loosening elements made in the form of mutually oppositely directed teeth, the loosening elements are installed in the lugs formed on the outer sides of the chain link, and fixed in them by means of a collapsible connection.

The disadvantage of the prototype is the low quality of tillage due to the large pitch of the teeth in the process.

The objective of the proposed device is to improve the quality of tillage by reducing the pitch of the teeth in the process.

The solution to this problem is achieved by the fact that the working body of the harrow is chain, made in the form of chain loops with loosening elements, made in the form of pairs of mutually oppositely directed teeth, on the one hand tapered and connected to the plate on the other side by means of a collapsible threaded connection, in contrast to prototype, the plate is rigidly fixed in the inner space of the link of the chain train, two nuts are rigidly fixed to it on both sides, into which the teeth are screwed, while the pairs of teeth on each link are located coaxially.

With this placement of the teeth, compared with the prototype (with equal parameters of the chain link and tooth), the radius of the circle described by the tops of the teeth and the pitch of the teeth during processing are reduced, which will lead to an increase in the intensity and improvement of the quality of tillage.

In addition, this solution makes it possible to increase the reliability of the structure due to the rigid fastening of the plate from two opposite sides in the internal space of the link.

The utility model is illustrated by the figures:

fig. 1 - general view;

fig. 2-technological parameters.

The working body of the chain harrow (Fig. 1) consists of a link 1 of a chain train, in the internal space of which a plate 2 is rigidly fixed, on which nuts 3 are coaxially rigidly fixed on both sides. with plate 2 through a collapsible (threaded) connection with nut 3.

The device operates as follows (Fig. 2). A chain train with working bodies, which are mutually oppositely directed cone-shaped teeth 4, connected to the plate 2 by means of a collapsible (threaded) connection with a nut 3, rigidly fixed on the plate 2, rotate due to the engagement of the teeth 4 with the soil, loosening it. The intensity of loosening and the quality of tillage depend on the radius of the circumscribed circle R, which provides the pitch of the teeth H. The depth of tillage depends on the length of the teeth L. The radius of the circumscribed circle R of the proposed device and the pitch of the teeth H is less than that of the prototype, with the same length of the teeth L, due to the coaxial placement of pairs of teeth. At the same time, the intensity of loosening and the quality of tillage increase, an increase in the reliability of the structure is also achieved, and the likelihood of a technical failure is reduced. It is possible to quickly replace the tooth when it is worn.

The technical result when using the proposed device is to improve the quality of tillage, by reducing the radius of the circumscribed circle R and the tooth pitch H with the same tooth length L compared to the prototype, which allows to increase crop yields.

Claims (1)

The working body of the chain harrow, made in the form of chain trains with loosening elements, made in the form of pairs of mutually oppositely directed teeth, tapered on one side and connected to the plate on the other side by means of a collapsible threaded connection, characterized in that the plate is rigidly fixed in the internal space of the link of the chain train, two nuts are rigidly fixed to it on both sides, into which the teeth are screwed, while the pairs of teeth on each link are located coaxially.

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