SU843859A1 - Device for procurement of trees and stumps with roots - Google Patents

Description

one

The invention relates to devices for harvesting trees and stumps with roots and can be used in the forest industry.

A device for harvesting root stumps is known, comprising a frame with guides for moving a chain cutting member, a hydraulic cylinder for lifting the frame and a hydraulic motor 1.

The disadvantages of the known device is incomplete cutting of the root system and significant loss of wood due to the large width of the cut.

The closest in technical essence to the invention is a device for harvesting trees and stumps with roots, including knives mounted on pivotally vertical frames and reciprocating drives of knives relative to frames 2.

The disadvantages of the known device are the considerable power consumption for moving the working member, made in the form of power cutting knives, and the impossibility of using it for harvesting trees without roots.

The purpose of the invention is to reduce the energy intensity of the procurement process and increase the versatility of the device.

This is achieved by the fact that the knives are made in the form of saws, and the drives of their reciprocating movement - in the form of crank-connecting rod mechanisms, which are equipped with drives for their rotation relative to the frames. In addition, cranks are equipped with balancing weights.

FIG. 1 shows a device for harvesting trees and stumps with roots, a general view; in fig. 2 - device position

when cutting trees without roots; in fig. 3 - section A-A of FIG. 2; in fig. 4 is a diagram of the interaction of the saw teeth with wood. Device for harvesting trees and

stubs with roots includes knives 2 mounted on pivotally in the vertical plane frames 1, made in the form of saws 3. Each saw 3 is fixed in a connecting rod 4, which is connected to two synchronously rotating cranks 5. The cranks are kinematically connected to each other by means of a gear 6 and the shaft of one crank is connected to a drive, for example by a hydraulic motor 7, mounted on a pivoting frame 1. To enable the saw to slide on the object being machined, gear housing 6 is rigidly connected to gear 8, which interacts with gear rack 9, which is the rod of the hydraulic cylinder 10 of the thrust mechanism.

For dynamic balancing of the rotating masses, weights are mounted on the cranks. I. Each pivoting frame can be connected by means of a detachable connection to the base machine (not shown in the drawings).

The device for harvesting trees and stumps with roots works as follows.

The device is driven by a base machine to a tree or stump. Before the saws are put into operation, they are set with pivoting frames 1 at an angle to each other. Installation at an angle a is carried out once at the transition, for example, from a roll with roots to a roll without roots. Structurally, it is possible to provide for a mechanical rotation at an angle a. The plane of the axis of the nodes is set approximately around the center of the tree (or mon). In the initial position, the saw occupies position I (see Fig. 3).

The hydraulic motor 7 is turned on, which rotates two cranks 5 by means of a gear 6, and the connecting rod 4 receives a plane-parallel rotational motion. Simultaneously with the connecting rod, saws 3 are also obtained with rotation of the crank radius.

The hydraulic cylinder 10 is turned on, the rod of which rotates the gear 8. The gear, cranks and saw are rotated along with the gear around the axis of the hydraulic motor. As a result, the tip of the saw gradually deepens into the ground and sawing of the roots of the tree 12 (or mon) occurs.

During the rotation of the saw and connecting rod, dynamic inertial forces of the first kind arise, which are balanced with the help of loads 11.

The saw tooth removes arc-shaped chips. In this case, the design of the teeth may be different (for simplicity, notched teeth are shown in Fig. 4, similar to saw teeth for transverse sawing of wood). For example, for felling trees without roots, the saw may have L-shaped teeth from universal saw chains (when removing the tooth limiter). Carbide plates are used to cut trees and stumps.

The speed of the plane-parallel rotation V of the saw is directed in such a way that, at the time of cutting, the teeth move to the drive of the device and experience mainly tensile stress. This allows the use of thin saw blades, for example, trapezoidal section.

The radius of rotation for all teeth is the same, depending on the radius of the cranks and must be greater than the pitch of the saw teeth. In this case, a normal chip formation mode is provided, which is also determined by the ratio of the speeds and v. The proposed device will reduce the energy intensity of the process of harvesting trees and stumps with roots and ensure the harvesting of trees without roots.

Claims (2)

Invention Formula 1- A device for harvesting trees and stumps with roots, including knives mounted on frames that are rotatable in a vertical plane and reciprocating drives of knives relative to frames, characterized in that, in order to reduce the energy intensity of the procurement process and increase the versatility of the device, the knives are made in the form of saws, and the drives of their reciprocating movement are in the form of crank-drive mechanisms, which are equipped with actuators of their rotation relative to the frames. 2. A device according to claim 1, characterized in that the cranks are provided with balancing weights. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 509261, cl. A 01G 23/06, 1974. 2. USSR author's certificate number 478583, CL A 01G 23/06, 1972 (prototype).