SU1005727A1 - Knife-type cutting-off member - Google Patents

Abstract

1. A KNIVER CUTTING ORGAN, containing cylindrical knob holders with segment cutouts mounted on the body, knives swiveling around a common axis and a knife rotation drive, so that, in order to increase reliability of operation, the cutter body is equipped semi-cylinders that are mounted on the knife | Holders with the concentric segment cuts, and the inner surface of the knives are made along the edge equal to the radius of the outer cylindrical surface of the knife holders. 2. The body according to claim 1, characterized in that the ratio of the radius of the semicylinders to the radius of the segment cuts is from 1 to 2, and the ratio of the minimum height of the semicylinders to the radius of the segment cuts is greater than or equal to 0.5.3. The body of PP.1 and 2, characterized in that the knives are attached to cylindrical knife holders by means of bolts, the longitudinal axes of which are located along the radius passing through the axis of rotation of the knives. .o sp yu vj

Description

The invention relates to knife cutting bodies and can be used in the forestry industry.

Known knife cutting body includes rotary relative to the common axis of the levers, to the free ends of which are attached the knife holders with knives, and the knife holders are made with segment notches 1

The closest technical solution to the invention is a knife-cut organ containing a cylindrical knob holders with segment cut-outs mounted on the body, knives rotating around a common axis and a knives rotation drive 2}

A disadvantage of the known devices is their low reliability due to the fact that when laying cut trees in bundles the lower part of the trunk can slide along. internal surface of knives.

The aim of the invention is to increase the reliability of operation.

The goal is achieved by the fact that the knife, the howling cutting body is equipped with semi-cylinders, which are mounted on the knife holders with concentric segment cuts, and the internal surface of the knives is made along a radius equal to the radius of the narrow cylindrical surface of the knife holders.

Moreover, the ratio of the radius of the semi-cylinders to the radius of the segment notches is from 1 to 2, and the ratio of the minimum height of the semi-cylinders to the radius of the segment notches is greater than or equal to 0.5.

In addition, the knives are attached to cylindrical knife holders with bolts, the longitudinal axes of which are located along a radius passing through the axis of rotation of the knives.

FIG. 1 shows a knife cutting body, top view, in FIG. 2, section A-f in FIG. one; in fig. 3 section bb in fig. one; in fig. 4, view B in FIG. one.

Knife cutting body consists of two cylindrical knife holders 1 with segment cuts 2, made along the radius of

To the cylindrical knife holders are attached levers 3, having one common axis 4 turns. Concentric segmental notches 2 are installed two half-cylinders 5, made along the radius R. The minimum height of the half-cylinders is equal to h.

In order to ensure reliable retention of the butt part of the tree after it has been cut, the ratio R / r must be from 1 to 2, and the ratio 11 of the minimum height h of half-cylinders 5 to the radius of the segment cuts 2 must be

To the outer cylindrical part of the knife holders 1 fasten knives 6,

the inner cylindrical surface of which is made along the radius R equal to the radius of the outer cylindrical surface of the knife holders 1. The cylindrical knives 6 are fixed

to the holder 1 with overlays 7 with bolts 8, the longitudinal axes of which are directed to the center of axis 4. On the side opposite to the cutting edge of the knives 6, the stops 9 in contact with the blades 6 are fixed on the holder’s 1 x 1 above the half-cylinders 5 and the holder-holders 1 are closed overlays 10, thereby forming a section, which increases the reliability of the knife

5 cutting organ. The rear lower part of the knife holders 1 has a slice that improves the operation of the knife cutting body. The cut is closed from the bottom by a plate 11, which increases the rigidity of the structure. The knife body is attached to the stand of the gripping device by the axis 4.

The device works as follows.

Reinforced with hinge

 On the boom of the logging machine, a device for cutting trees with opener holders 1 is fed to the butt of the tree to be cut, so that the end

0, axis 4 abuts against the trunk between the blades 6, the cutting edges of which touch the ground. Next, grabs (not shown),

5 located above axis 4, the tree is clamped and at the same time the hydraulic cylinder is driven not shown, connected to the levers 3. In this case, the levers 3, turning

0 relative to axis 4 along the radius R, set in motion the knife holders 1, which transmit force to the knives 6 through the stops 9, which unload the fasteners arranged along the radius R

5 bolts 8 from shear forces. As a result, the knives 6 are closed and cut the trunk at the surface of the earth along the radius R-.

Komleva part of the cut tree, resting on the inner surface of the knives b, is kept inside the cylinder formed by half-cylinders 5.

When cutting the next tree, the cycle is repeated.

We offer knife design

5 of the cutting organ, in comparison with the known one, provides for the effective retention of the COMED part of the cut tree, allows for the use of thinner cutting knives and thereby reduce the cutting force and metal intensity of the structure.

Fastening cutting knives with radial bolts and end stops improves the manufacturing technology of laziness, increases the reliability of the design, reduces costs during operation.

The use of the proposal in the design of the now commercially available LP-19 feller buncher will increase labor productivity by at least 3% by reducing the labor costs for maintenance and repair of the shearing device, as well as by at least 2 5% yield.

b c

business wood, by reducing the height of the remaining mon by not less than 20 cm. If the LP-19 feller buncher now harvests 30,000 m of wood per year, using the proposed cutting body in the machine’s construction will increase its annual capacity by 1,650 m, :

The one-time economic effect costs 1237 rubles per car.

/ bL

FIG. 2

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Claims (3)

1. KNIFE CUTTING BODY, comprising cylindrical knife holders with segment cutouts mounted on the body, rotary knives around a common axis and a rotary drive of knives, characterized in that, in order to improve the reliability of operation, the knife cutting organ is equipped with half cylinders that are mounted on the knife ^ holders concentrically segmented cuts, and the inner surface of the knives is made along a radius equal to the radius of the outer cylindrical surface of the knife holders. 2. Authority for π. 1, characterized in that the ratio of the radius of the half cylinders to the radius of the segment cuts is from 1 to 2, and the ratio of the minimum height of the half cylinders to the radius of the segment cuts is greater than or equal to 0.5. 3. The body according to claims 1 and 2, characterized in that the knives are attached to the cylindrical knife holders with bolts, the longitudinal axes of which are located along the radius passing through the axis of rotation of the knives. in e 5727