SU1553612A1 - Cutting chain of narrow-trenching excavator - Google Patents

Abstract

This invention relates to cutting chains of bar trenchers. The goal is to increase productivity. The cutting chain includes fists 1 with incisors 2 arranged in radii in separate groups. Intermediate cams 3 are located between the groups. Scrappers 5 are fixed to the cams 3, the outer edge of which is made radially. When cutting gaps in the ground, the cutters 2 work the soil, and the scrapers 5 take out the soil. This increases the performance of the trenchers with the bar working body. 3 il.

Description

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The invention relates to earthmoving machines, namely cutting chains of bar machines.

The purpose of the invention is to increase productivity by improving the out-of-chain capacity.

FIG. 1 shows a cutting chain, side view; in fig. 2 is a diagram of the arrangement of incisors in groups and scrapers; in fig. 3 is a section A-A in FIG. one; in fig. 4 - cutting chain, projection of incisors of one group on a plane.

The cutting chain of a narrow-trench excavator includes fists 1 with cutters 2. located in radii (Fig. 4) in separate groups (Fig. 2). Between the groups are located intermediate fists 3 with clamps 4, on which scrapers 5 are fastened. Clamps 4 are connected with intermediate fists 3 with

using the bolts 6 and nuts 7. The scraper 5 has an outer edge 8 which is made along the radius, and the width of the scraper is less than the width of the cutting chain along the side cutters, and the departure of the scraper is less than the maximum possible feed to the cutters of one group.

The incisors 2 of each group develop soil or rock across the entire width of the trenches, and the scrapers 5 transport 2 particles crushed by incisors upward. Cutters 2 and cams 1 are also involved in lifting particles. The scraper 5 area exceeds the frontal area of incisors 2 and cams 1, therefore, all other things being equal, the cutting power of the cutting chain and the performance of the excavator as a whole increase, and the possibility of chain pinning decreases.

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Editor N.Gorvat

№ 3 Figi

Compiled by I.Sinitska

Tehred A. Kravchuk Proofreader N. Revskap

 . 4 56.7

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Claims (1)

SUMMARY OF THE INVENTION Cutting chain of a narrow-trench excavator, including articulated · Fists interconnected, part of which Has cutters fixed along the radii, forming groups, and the other part of Intermediate fists is located Between the fists, forming a group of cutters, characterized in that, in order to increase productivity by To improve the extension ability of the chain, it is equipped with a scraper fixed to each intermediate fist, the outer edge of which is made in radius and its outreach is less than the outset of the incisors. B1 f h -6 h ( h P h -A if h “L 7 “ . ( at A t -to g / h “H at. -h / 1 g t *4 f h * -h > - \ g G “ / H h V- -L “H G “ ( h ( at “L g / h to. -H J λ- h to- " h - to h At j Compiled by I. Sinitskaya