RU162808U1 - WORKING BODY OF THE MACHINE FOR CUTTING OF WOOD-SHRUBBLE VEGETATION AND PREVENTION OF FIRE - Google Patents

Abstract

The working body of the machine for cutting wood and shrubby vegetation and preventing fires, including a rotating drum with cutting units mounted on it, each of which contains a mounting plate fixed to the drum, and a cutting tooth mounted detachably on the mounting plate, characterized in that each mounting the plate is pivotally mounted on the drum in such a way that a safety stop is located on the side of the opposite cutting tooth, and the safety stop has a weakened cross section in the lower part STI.

Description

The device relates to rotary brush cutters and can be used for cleaning power lines and communications, protection zones of pipelines, in the forestry complex for preparatory and auxiliary works, forestry, in particular for clearing clearings and arranging mineralized strips to prevent the spread of forest fires, as well as during cultural works for cutting tree and shrub vegetation and chopping stumps.

Known cutting head comprising a rotary drum, couplings spaced along the longitudinal axis of the drum, and at least one cutting unit consisting of a mounting plate and a cutting tooth is installed on each adjacent pair of couplings [1].

This design has high performance when cutting and grinding shrubs and trees. However, a number of significant disadvantages should be indicated. When clearing territories from woody-shrubby vegetation, it is also necessary to grind hoarfrost and dumped trees. In this case, the working body interacts with soil and stones. Such work leads to tremendous radial and axial loads on the elements of the cutting head and, in particular, on the cutting unit. As a result, there is a rapid wear of the working body, and often, for example, when meeting with a large boulder, its breakage.

In addition, this design does not allow the formation of mineralized strips to prevent the spread of forest fires due to the design features of the cutting unit (insignificant protrusion of the cutting tooth above the coupling and the shape of the mounting plate).

Partially, the problem of the breakdown of the working body due to interaction with stones and soil was solved in the design features of the working body of the machine for clearing areas from trees and shrubs, containing a rotating drum with cutters pivotally mounted on its outer surface [2].

Cutting and grinding in this case occurs due to the kinetic energy accumulated by the articulated cutter. This design allows the cutter to bow when interacting with the stone. However, at the same time, this leads to a decrease in productivity and the maximum diameter of the cut and chopped wood and shrub vegetation. In addition, this design does not allow the grinding of stumps, as well as the formation of mineralized strips, since the deviating cutter cannot be buried in the soil.

The closest analogue, taken as a prototype, is the working body of the machine for cutting tree and shrubbery vegetation on the root, including a rotating drum with cutting units mounted on it, each of which contains a mounting plate fixedly mounted on the drum, and a cutting tooth mounted detachably on mounting plate [3].

Such a device makes it possible to grind not only the aerial part of tree-shrubbery vegetation, but also stumps, roots, and fallen trees, and in general is better suited for clearing territories by ensuring high strength of the cutting unit. The disadvantage of this device is that when working in difficult conditions (for example, on stony soils) when faced with obstacles that cause peak loads (for example, with a large boulder hidden in the soil), the cutting unit, in particular the mounting plate, can be destroyed. In this case, the work must be stopped and the repair of the working body.

The technical result, which is directed by the inventive working body of the machine for cutting wood and shrubbery and the prevention of fires, is to increase the reliability of the device, its service life, ease of operation and productivity of the work performed.

The technical result is achieved due to the fact that each mounting plate is pivotally mounted on the drum so that from the side of the opposite cutting tooth there is a safety stop, and the safety stop has a weakened section in the lower part.

The device is explained in the diagrams, where in FIG. 1 shows a general view of the device (isometry), in FIG. 2 - also (two of the mounting plates are shown in position with a broken safety stop).

The working body of the machine for cutting wood and shrubby vegetation and preventing fires includes a rotating drum 1 with mounted cutting units, each of which contains a mounting plate 2, mounted on the drum 1, and a cutting tooth 3, mounted detachably on the mounting plate 2.

Each mounting plate 2 is pivotally mounted on the drum 1 in such a way that a safety stop 4 is located on the opposite side of the cutting tooth 3. The safety stop 4 has a weakened cross section 5 in the lower part and can be mounted on the rotating drum 1 by, for example, bolting or welding.

The device operates as follows. Turn on the drive of the working body, leading to the rotation of the drum 1. Next, the working body, which can be mounted on a self-propelled chassis or manipulator, is led to the woody-shrubby vegetation. Using cutting nodes located on a rotating drum 1, trees, shrubs, stumps and roots are cut and chopped. The formation of mineralized strips is carried out by deepening the cutting units of the rotating drum 1 into the soil, while its loosening occurs through mounting plates 2.

When one of the cutting units (or several at the same time) meets a large boulder (or another obstacle causing critical loads leading to the destruction of the cutting unit), the safety stop 4 is destroyed along the weakened section 5, which allows the mounting plate 2 to deviate. After the destruction of the safety stop 4, the work can be continued, since the cutting unit goes into operation without stop. In this case, the mounting plate under the influence of centrifugal forces returns to its original position. Cutting is due to the kinetic energy accumulated by it.

After completion of work or convenient time and place for repair, the safety stop 4 is restored.

Thus, the working body of the machine for cutting wood and shrubbery vegetation and preventing fires can improve the reliability of the device, its service life, ease of use and productivity of the work performed. Improving the reliability of the device and its service life is achieved by protecting the cutting unit from destruction due to critical loads ( for example, when meeting with a large stone).

Convenience of operation is ensured in view of the fact that when faced with obstacles causing critical loads, there is no need to interrupt work to carry out immediate repairs. This operation may be delayed. For the same reason, productivity increases.

BIBLIOGRAPHY

1. Patent US 7810531 "Brush cutting head", priority from 05/11/2006

2. Patent US 5975167 "Cutter for land clearing device", priority dated 12/14/1998.

3. Patent US 6311910 "Production plus hammer with protective pocket and rotor assembly", priority 09.11.1999.

Claims (1)

The working body of the machine for cutting wood and shrubby vegetation and preventing fires, including a rotating drum with cutting units mounted on it, each of which contains a mounting plate fixed to the drum, and a cutting tooth mounted detachably on the mounting plate, characterized in that each mounting the plate is pivotally mounted on the drum in such a way that a safety stop is located on the side of the opposite cutting tooth, and the safety stop has a weakened cross section in the lower part STI.

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