SU344817A1 - DEVICE FOR CUTTING TREES - Google Patents

Description

The invention can be used in the forest industry.

Tree-cutting devices are known, mounted at the end of a boom of a logging machine and containing a turnstand with a gripper mounted on it, a cutter mechanism and a base plate for cut trees.

A disadvantage of such devices is that it is difficult to cut crooked trees with a low crown and simultaneously capture several trees, and the visibility of the action of the working bodies when cutting the first tree is significantly impaired.

The purpose of the invention is to increase work efficiency.

To do this, the grip is made in the form of a turntable, equipped with pockets for placing trees and an curvilinear lever in it, and a shearing mechanism — in the form of two power cutting knives with side walls and support plates for sheared trees, and the accumulators of sheared trees in the grip and shearing The mechanism is located eccentrically relative to the pivot.

device grip; in fig. 3 - shearing mechanism of the device.

The tree-cutting device is mounted on the boom / logging machine and contains a pivot column 2, on which the grip 3 and the cutting mechanism 4 are mounted.

The grip contains a frame 5 fixed on the upper end of the pivot, a turning circle 6 with pockets 7 for placing trees in them, a curved pressure lever 8 with a hydrocylinder 9.

The shearing mechanism consists of a rigidly mounted on the lower end of a rotary stand of a fixed knife W with a side vertical wall //, a movable knife 12 with a wall 13 and a hydraulic cylinder 14 of a nolch actuator. Directly above the vertical wall of the // accumulator is mounted an lever lever - / 5 with a hydraulic cylinder 16 of its rotation.

The device for cutting trees works as follows.

The device is led to the tree being cut and the grip 3 and the cutting mechanism are set at the required level. Due to the fact that the grip and the shearing mechanism are in the open position, the curvature of the trunk and the low crown affect the movement of the device upwards or downwards.

After the device has been installed at the place of cutting the tree, the hydraulic cylinder 9 of the pickup drive is turned on and the tree pressed by the pressure lever 8 in the pocket 7 of the turntable 6 is bent to the left. The bending of the wood creates a stretched fiber zone in the cutting plane, i.e. the force required to cut the wood is reduced. The cylinder 14 drives knife 12 and the tree is cut.

After the tree has been cut, the hydraulic cylinder 14 returns to its original position and at the same time the hydraulic cylinder 16 turns on nma. The latter moves and supports the tree in the hopper, and the movable knife returns to its original position. The tree resting on the support plate of the storage device and supported by the clamping and gripping 3 is lifted with the help of the boom of the forest machine and brought to the next tree to be cut.

The process of capturing, cutting and accumulating is repeated.

After the accumulator is filled with cut trees, a pack of trees is removed from the stand and laid on the broomstick of a logging machine.

Subject invention

A tree-cutting device that is motivated at the end of the boom of a logging machine and contains a swivel stand with a gripper mounted on it, a shearing mechanism and a base plate for the cut trees, characterized in that the gripper is designed as a new wheel with pockets for placing trees and a clamping curvilinear lever in them, and a cutting mechanism in the form of two power cutting knives, one side walls and base plates for cut trees.

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