SU1212373A1 - Arrangement for felling trees and cutting member therefor - Google Patents

Abstract

1. A device for cutting trees, containing a support frame with driven grippers, on which a saw tire is installed with the possibility of turning around horizontal axes, made with a guide groove, in which the cutting bodies are placed, and driving them, characterized in size reduction and metal consumption, the saw blade is made in the form of a half ring and bent in cross section along the arc of a circle, the center of curvature of which lies on the axis of rotation of the saw bar (L

Description

2. A cutting member comprising a drive sprocket and a tire with a guide groove in which the cutting links are located, f. If .11 is the occurrence of Tefjf ,, that, in order to achieve reliable operation, by eliminating the jamming of the cutting slugs; these are directed to the Invention The invention relates to devices for machine cutting of trees and can be used in the forest industry.

The purpose of the invention is to reduce the size and metal consumption of a device for cutting trees, as well as to increase the reliability of the cutting body in operation by eliminating the jamming of the cutting units in the guide groove of the tire on its curvilinear sections.

Fig. 1 shows a device for cutting trees placed on an arrow-manipulator of a forest machine; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2; figure 4 - cutting body, a general view; on fig.Z - section bb In figure 4; figure 6 - cross-section dD in figure 4; figure 7 is a view of G in figure 4; on fig.Z - cutting link overall view.

A tree-cutting device 1, which is an integral part of the swiveling device 2, is placed on the boom-manipulator 3 of the logging machine and contains a cutting member 4 mounted rotatably on the bracket 5. The turning member of the cutting member 4 is mounted on the motor 6. bracket 5. On the same bracket 5, the hydraulic motor 7 is mounted, which drives the cutting body 4, which contains the saw rail 8 with 9 cutting links 10 placed in its groove and the sprocket 11. The saw rail 8 is designed as ribs, moreover, in cross section it is bent along an arc of a circle, the center of curvature of which lies on the axis of rotation of the cutting orbital groove of the tire on its curvilinear sections, the groove in cross section is radial, and the cutting links are fitted with axes installed on the axles in the form of spherical segments arranged in pairs on both sides of each cutting link.

by 4. The saw blade 8 is connected to the shaft of the hydraulic motor 6, and the drive sprocket 11 - to the shaft of the hydraulic motor 7. The cutting body 4, containing the driving sprocket 11 and the tire B, can be performed as follows. A guide groove 9, formed around the perimeter of the tire 8, is formed by side plates 12 and in section is made along a radius. The tabs 12 are fixed on the tire 8 with screws or rivets 13 and have removable hatches 14 for inserting the cutting links 10 into the groove,

each of which contains a cutter 15 and rollers 16. The latter are made in the form of spherical segments and are installed in pairs on the axes x 17 on both sides of the incisors 15. Between the rollers 16 and

the walls of the incisors 15 have washers 18. The distance between the rollers 16 of the link 10 is chosen equal to the width of the tooth of the drive sprocket 11.

Cutting links 10 may alternate with links 19, limiting the depth of cut.

The device for cutting trees works as follows.

With the help of the manipulator 3, the felling device 2 is brought to the tree and clamped with a gripping device. The rotation from the motor 7 is transmitted to the driving sprocket. and the cutting links 10 begin to move within the groove 9 of the saw bar 8. Turning on the hydraulic motor. 6, the cutting member 4 is rotated. In the process of turning the cutting member 4, the cutting of wood occurs. Moreover, since the cutting body has the shape of a half-ring, the cut is obtained of a spherical shape, and the lower point of the surface can lie

below ground level, which increases the yield of industrial wood. Due to the small dimensions of the cutting organ and placing it directly on the crown matte, the metal consumption of the device c is lowered.

The cutting body works as follows.

When the leading sprocket 1 1 rotates, its teeth enter into. interaction with links 10 and pushing them along guide groove 9. When

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In this way, the link -10 is moved within the guide groove of the belt 8 with the help of the rollers 16, which greatly facilitates the movement of the links. Since the 5 links are dumbbell-shaped, on the curved sections of the tire 8, the cut 15 does not come into contact with the middle part of the groove 9 walls. This eliminates the possibility of jamming of 10 links. The link 19 in the sawing process limits the cutting depth of the incisors 15, which eliminates their breakage and reduces the cutting force.

FIG. 2

B turned

YU

F (4g.Z

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6

FIG. five

Type G

15

15

15 j

Fi & .1

Editor O. Bugir

Compiled by Yu, Tazov

Tehred M. Nadi Corrector V. But ha

Order 659/2 Circulation 679 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Project.St.,

Claims (2)

1. A device for cutting trees, containing a support frame with drive grippers, on which a saw tire is mounted with a possibility of rotation around horizontal axes, made with a guide groove in which the cutting bodies are placed, and a drive for moving them, characterized in that, in order to reduce dimensions and reduce metal consumption, the saw bar is made in the form of a half ring and bent in cross section along an arc of a circle, the center of curvature of which lies on the axis of rotation of the saw g of the tire, FCG. 1 YSH12T ^PP ns> 2. A cutting body containing a drive sprocket and a tire with a guide groove in which the cutting links are located, which must be molded so that, in order to increase the reliability <in operation, by eliminating jamming of the cutting links in the guide groove of the tire in its curved sections, the groove in the cross section is made along the radius, and the cutting links are equipped with rollers mounted on the axes in the form of spherical segments arranged in pairs on two sides of each cutting link.