SU1400550A1 - Machine for removing stumps and digging out pits in frozen ground - Google Patents

Abstract

FIELD: forest industry. The purpose of the invention is to reduce energy consumption and simplify the design. A tubular milling cutter 4 is installed on the carrier link 2 and a m 7. The mechanism of rotation of the axis of rotation of the milling cutter 4 is made in the form of a lever and a pull rod. T ha 7 is garnishly connected at one end with the lever, and the other at the base chassis 1. The length of the pipe is (O, 815-0.820) L, the length of the lever is (O, 185-0.195) L, where L is the length of the bearing sign. This ratio ensures that the cutter axis rotates over the working stroke by the angle uj arcsin (h - LcosueOH, where H is the distance from the hinge axis of the mill attachment to the bearing link to its lower edge; yog. Arcsin h / L is the angle of rotation of the bearing link during the working stroke ; h is the height of the working stroke. With these dimensions of structural elements, the cutter jamming during indentation is excluded. Rotating and deepening, the cutter cuts the peripheral roots of the cutter with the cutting elements Mon H.F.

Description

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The invention relates to a device for stump removal and the development of frozen ground and can be used in forestry, rural and communal ownership.

The purpose of the invention is to reduce energy consumption, simplifying the design.

The drawing shows the proposed machine, the overall appearance.

The machine for removing stumps includes a base self-propelled chassis 1, hingedly attached to its skeleton (not shown) carrier link (boom) 2, on the peripheral end of which the gearbox housing 3, | tube cutter-4, attached to 1 is the gearbox shaft via a flange 5. The gearbox input shaft is connected to the power take-off shaft (PTO) of the base chassis via cardan shaft 6. The gearbox housing is additionally connected with the base self-propelled chassis 7 of adjustable length. The bearing link is equipped with a cutter-lowering mechanism, including adjustable lengths, 8, a bracket 9 and a hydraulic cylinder 10 hinged on a self-propelled chassis 10. Cutting elements 1 1 1, fixed in the lower part of the cutter, and hooks 12 on the outer surface of the cylindrical body cutters are screw coiling 13.

The length L of the carrier link 2 (the distance between points A and D) is selected from the condition of stability of the longitudinal | Tilting machine. The height of the cutter; H (the distance between points D and F) is determined in the following way. The depth of cutter or working stroke (the distance between points E and F) must be equal to the maximum diameter of the removed mon (to ensure guaranteed cutting of peripheral roots), i.e. equal to its internal diameter. The distance between points E and D is chosen constructively, it must be sufficient to accommodate the hooks 12 and the flange 5 and equal the height of the anchor of the carrier link 2 on the backbone of the base chassis (the distance between points O and A). The height h and the distance 1D between the hinges of the attachment to the base chassis of the carrier link 2 and the rod 7 (distance DB) are given constructively when choosing the front axle base chassis.

The length Ijjjj of the lever associated with the cutter and the length Ip of the pin 7 of the rotation mechanism are selected from the condition of ensuring the rotation of the axis of rotation of the cutter per stroke at an angle

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 L

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The machine works as follows.

When removing stumps 14 by maneuvering the self-propelled base chassis, the milling cutter is installed above the stump. Then, the PTO of the base chassis is turned on, which gives the mill a rotational motion, and by means of the hydraulic cylinder 10, it is lowered down. Having rotated and buried, the cutter cuts the peripheral roots of the mon with the cutting elements 11, and, having crashed the hooks 12 into its above-ground part, twists the taproot. At the same time, the crushed chip earth on the mixture is moved upward by screw winding 13 and placed in the collet 15. After that, the cutter, together with the stump inside, is removed from the soil by means of the hydraulic cylinder 10. from the cutter. When removing stumps with developed peripheral roots having an asymmetric arrangement, considerable lateral forces can act on the cutter; therefore, to reliably retain the axis of rotation of the cutter, ying with a sufficiently large distance between the link 2 and 7 draft type.

The ratio of the sizes of links of the mechanism for turning the axis of the cutter, namely, the length of the string 7, is (0.815-0.820) L, and the distance between points C and D, equal to (O, 185-0.195) L, ensures the rotation of the axis of the cutter off. L-LcosAoi, chii move at angle A arcsin,

when fully buried, it occupies a position close to the vertical and perpendicular to the carrier,

h where Dob arcsin --- is the angle of rotation

for the working stroke of the carrier link. In the rotational-forward motion of the milling cutter, the center of the circle of its lower edge twice crosses a certain vertical line, namely, at point F (with full depth) and at point E (at the beginning of depth).

The use of a tool for turning the cutter allows reducing the energy consumption of the process, deepening the cutter by reducing the width of the slot being cut. In addition, the design of the machine is simplified by eliminating the hydraulic drive from the mechanism of rotation of the milling cutter, and also increases the ease of operation by eliminating the need to control the installation of the milling cutter at the moment of the beginning of the digging.

Claims (2)

1. A machine for removing stumps and cuts in frozen ground, including a base self-propelled chassis, hinged to a base chassis, a tubular driven milling cutter, equipped with a mechanism for rotating its axis of rotation, made in the form of a lever connected to a mill, and a hinge, hingedly connected at one end from the snarl of the structure, the milling cutter is made with the possibility of rotation per turn at the angle H arcsin L l cosfi H where L is the length of the carrier link; H is the distance from the axis of the hinge 10 of the attachment of the milling cutter to the carrying link to its lower edge; th "/; arcsin h 15 L - the angle of rotation of the carrier link per working stroke; h is the height of the working stroke. 2. Machine pop.1, which differs from the fact that with H equal to 20 0.625L, h equal to O, 417L, and pacctohj of the scientific research institute between the joints of connection to the base chassis, the bearing link and the steering mechanism thrust, equal to O, 184L, the length of the lever, svangom, and the other - with the base chassis, about t - 25 th with the cutter, is (0,185-0,195) 1, neither the design, the mill is made with the possibility of rotation for the working stroke at an angle arcsin L l cosfi H where L is the length of the carrier link; H is the distance from the axis of the hinge of the milling cutter to the bearing link to its lower edge; th "/; arcsin h  L - the angle of rotation of the carrier link per working stroke; h is the height of the working stroke. 2. Machine pop.1, which differs from the fact that with H equal to 0.625L, h equal to O, 417L, and paccTOHj of the scientific research institute between the hinges of attachment to the base chassis, the bearing link and the thrust mechanism of the turn, equal to Oh, 184L, lever length, connected This is due to the fact that, in order to reduce energy consumption and simplify the length of the swivel gear mechanism - (0.815-0.820) L.