RU2464774C1 - Claw-like felling unit of tree harvesting machine - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: claw-like felling unit of a tree harvesting machine mounted on a manipulator of the latter comprises a housing. On the housing two hydraulically controlled grips and a sawing machine are mounted spaced in height. The device is equipped with a mechanism for non-clamping work of the sawing machine. The mechanism comprises a slide mounted in a vertical housing cavity with the possibility of its reciprocation. Between the slide and the upper cavity wall an elastic element is located, such as a compression spring, and at the bottom the slider is rigidly connected to the rod with the ability to move the latter along the guides made in the lower wall of the cavity, and outside of the latter it is provided with a base plate.

EFFECT: implementation enables to enhance the technological capabilities of the device, to increase performance and reliability in operation.

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Description

The invention relates to gripping-cutting devices of forestry machines and can be used in the forest industry.

A gripping-cutting device of a forestry machine is mounted on the boom of the latter and comprising a housing on which a hydraulically controlled gripper, a sawing device and a device for bending the trunk and directional felling of the tree are made, made in the form of a V-shaped lever pivotally mounted on the housing with the middle part with the possibility of turning in the longitudinal vertical plane, and a hydraulically controlled grip is located between the shoulders of the V-shaped lever (USSR Author's Certificate No. 625660, class A01G 23/08, priority date 12.04.1977, op Released 08/21/1978).

The known gripping and cutting device of a forestry machine allows only directional felling of trees after cutting and does not allow for controlled felling.

Also known is a gripping-cutting device of a logging machine mounted on a manipulator of the latter and containing a housing on which two hydraulically controlled grips spaced apart in height are installed, a sawing device (R. Lumanov, Machine Forest Felling. - M.: Lesnaya Prost, 1990. - 280 sec., see fig. 4.1, b on p. 114, fig. 4.3 on p. 117 and lines 1 ... 14 from the bottom on p. 116).

This gripping-cutting device of the logging machine does not provide sawless operation of the saw apparatus and the operator must provide the manipulator with clawless operation of the saw apparatus, which increases the load on the manipulator and reduces productivity.

The technical result in the proposed design of the gripping-cutting device of the forest machine is to expand technological capabilities and increase productivity and reliability.

The technical result is achieved by the fact that the gripping-cutting device of the forest machine mounted on the boom of the latter and containing a housing on which two hydraulically controlled grippers are spaced apart in height, a saw apparatus, the novelty being that the device is equipped with a clawless operation mechanism of the saw apparatus, including a housing with a vertical cavity in which the slider is placed with the possibility of its reciprocating motion, while between the slider and the upper wall of the cavity is placed n elastic member, for example a compression spring, and the bottom slider rigidly associated with the rod, the latter is movable along vertical guides formed in the bottom wall of the cavity and outside the latter is provided with a supporting plate.

Such a constructive implementation of the gripping-cutting device of the forestry machine allows you to create a zone of stretched fibers between the lower hydraulically controlled grab and soil on the tree to be cut and thereby ensure a sawless operation of the saw apparatus, the effort to create a zone of stretched fibers is not transmitted to the manipulator, thus achieving a technical result.

In the patent and scientific and technical literature, such a design of a gripping-cutting device of a forestry machine was not found by us.

The drawing schematically shows a gripping-cutting device of a forestry machine, side view.

The grasping-cutting device of the logging machine mounted on the boom 1 of the last contains a housing 2 on which two hydraulically controlled grippers spaced in height are installed: the upper 3 and lower 4. Below the lower hydraulically controlled gripper 4, the saw apparatus 5 and its drive are mounted on the housing 2 (not shown). The housing 2 can be rotated around the axis 6 of the actuator 7, for example by means of a hydraulic cylinder. A vertical cavity 8 is made in the housing 2, in which a slider 9 is mounted with the possibility of its moving up and down. Between the slider 9 and the upper wall 10 of the cavity 8 is placed an elastic element 11, for example a compression spring. From below, the slider 9 is rigidly connected with the rod 12, which moves along the guides 13 made in the lower wall of the cavity 8, and, outside the latter, is equipped with a base plate 14.

The gripping and cutting device of a forestry machine operates as follows.

The operator, controlling the boom 1 and the drive 7, with the hydraulically controlled grips 3 and 4 open, points the device at the tree 15, lowers it down to such a height that the remaining stump 16 is an acceptable height. When lowering the device down, the base plate 14 rests on the ground 17 and presses the slider 9 upwards through the rod 12, while compressing the elastic element 11. After that, the tree 15 is clamped by the hydraulic grips 3 and 4 and between the lower hydraulic controlled gripper 4 and the ground 17 on the tree 15 is created an area of stretched fibers, which ensures a clampless operation of the saw apparatus 5. After cutting the tree 15, at the initial moment of felling of the tree 15, the elastic element 11 creates an additional felling moment. After laying the tree 15 in the required place, the cycle of the device is repeated.

The proposed design of the gripping-cutting device of the logging machine provides a clampless operation of the saw apparatus, creates an additional felling moment, which increases the efficiency of its use.

Claims (1)

The gripping and cutting device of the forest machine mounted on the manipulator of the latter and comprising a housing on which two hydraulically controlled grippers are spaced apart in height and a saw apparatus, characterized in that it is equipped with a mechanism for clawless operation of the saw apparatus, including a slider mounted in a vertical cavity of the housing with the possibility of its reciprocating movement, and between the slider and the upper wall of the cavity there is an elastic element, for example a compression spring, and the bottom of the slider is rigidly connected with the rod with the possibility of movement of the latter along the guides made in the lower wall of the cavity, and outside the latter is equipped with a base plate.

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