RU2350069C2 - Wood harvesting head - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: wood harvesting head includes case attached by joints to knuckle boom, carriage with traveling gear, mounted in case guide lines with possibility of reciprocal movement, saw aggregate with drive, and grip levers. Grip levers are mounted on carriage and connected by joints to its traveling gear connected by the other end to harvesting head case.

EFFECT: enhanced performance due to construction.

3 cl, 4 dwg

Description

The invention relates to devices for felling trees with forestry machines and can be used in the forest industry.

A gripping-cutting device is known that includes power levers connected at one end to the power cylinders and to the other with cutting knives, gripper levers, the front part of which covers the trunk, and the rear ends are connected with the hydraulic cylinder of the tree trunk (See ed. St. No. 1308264 Cl. A01G 23/08, 23/06).

A disadvantage of the known device is that it does not ensure the continuity of the process of felling trees. In addition, the use of power knives leads to the splitting of the butt of the tree and the need to increase the pressure in the hydraulic system.

A gripping and cutting device is also known, including gripping arms and a hydraulic actuator, comprising a pump connected to the hydraulic cylinders of the gripping arms and a saw mechanism with a hydraulic actuator (See ed. St. N 1083966, class A01G 23/08, F15B 11/20).

The main disadvantage of this device is that it does not have high performance, because does not ensure the continuity of the process.

A gripping-cutting device of a forestry machine is known, including a housing with grips and a frame with a hydraulic saw mounted mechanism on it, the frame is installed in the guides of the housing with the possibility of reciprocating movement (See ed.St. N 1126247, class A01G 23/08 . Prototype).

A disadvantage of the known device is that after touching the tree with gripping levers, the manipulator boom stops, the tree is cut only after it has been gripped, and the tree is pushed from the jumper only after the tree is cut. That is, there is a discreteness of the roll process.

The above disadvantages contribute to a decrease in labor productivity in harvesting trees.

The present invention is a gripping-cutting device for harvesting trees. It includes a housing pivotally mounted on the boom of the manipulator, a carriage with a movement mechanism that is mounted in the guides of the housing with the possibility of reciprocating movement, a saw mechanism with a drive and gripping levers, according to the solution, the gripping levers are articulated mounted on the carriage and pivotally connected to the mechanism of its movement, which at the other end is pivotally connected to the housing of the gripping-cutting device. In addition, the carriage moving mechanism is made in the form of hydraulic cylinders that are connected to the housing to form an internal cavity, and the gripping-cutting device is additionally equipped with a delimbing device.

Comparative analysis with the prototype revealed the following distinctive features:

- gripping levers pivotally mounted on the carriage,

- gripping levers pivotally connected to the mechanism for moving the carriage,

- the mechanism for moving the carriage at the other end is pivotally connected to the housing of the gripping-cutting device.

An additional distinguishing feature is that:

- the mechanism for moving the carriage is made in the form of hydraulic cylinders associated with the housing with the formation of an internal cavity,

- the gripping-cutting device is additionally equipped with a delimbing device.

As can be seen from the comparative analysis, the identified set of essential features is new, therefore, the conclusion is valid that the influence of this set of features on the result achieved by the proposed invention is unknown, and therefore, the proposed invention meets the criterion of "novelty."

Analysis of patent and scientific and technical information in the field of forestry and logging industry, carried out according to the funds of KarTSNTI and the department of the chief designer of OTZ OJSC, showed that the proposed technical solution goes beyond the existing level of technology in this field. Therefore, it can be recognized as meeting the criterion of "inventive step".

The objective of the proposed technical solution is to increase labor productivity in forestry operations.

The solution to the problem is due to the articulation of the gripping levers simultaneously with the carriage and with the mechanism of its movement, performing articulation between the body of the gripping-cutting device and the other end of the carriage moving mechanism.

The claimed combination of essential features gives the claimed technical solution new properties to solve the problem.

The proposed device can be manufactured in industrial conditions of workshops of large factories or specialized small enterprises using standard equipment.

Therefore, the claimed device meets the criterion of "industrial applicability".

The proposed gripping-cutting device for harvesting trees is illustrated by drawings, which are presented on:

Figure 1 - gripping-cutting device,

Figure 2 is a General view (top view),

Figure 3 - section bB in figure 1 (barrel clamp with wood-leverage with the continued movement of the boom of the manipulator and the beginning of the movement of the housing of the gripping-cutting device),

Figure 4 - section bB in figure 1 (the final position of the housing of the gripping-cutting device before the collision of the tree).

A device for implementing the proposed device includes a housing 1 with guides (not shown in the drawing) pivotally mounted on the boom 2. The supporting prism 3 is pivotally mounted on the housing 1 and movably connected by means of a hydraulic cylinder 4 to the boom 2. In the guides (not indicated on the drawing) of the housing 1, a carriage 5 is mounted with the possibility of reciprocating movement relative to it. The mechanism for moving the carriage 5 is made in the form of hydraulic cylinders 6. The gripping levers 7 are pivotally mounted on the axes 8 and 9 of the carriage 5 and are pivotally connected to the rods of the hydraulic cylinders 6. The latter are pivotally connected to the housing 1 of the gripping-cutting device by the other end (body). The drive 10 saw mills 11 is installed on the housing 1 of the gripping-cutting device.

The device operates as follows.

Using the boom 2, the operator points the gripping-cutting device in a horizontal position on the tree. The carriage 5 is in the initial (left extreme) position. In this case, the gripping levers 7 are spread apart, and the supporting prism 3 is in the right extreme position (see figure 2).

When short arms (not shown) of the gripping arms 7 touch the surface of the tree trunk, the rods (not shown) begin to “retract” into the body (not shown) of the hydraulic cylinders 6. (The hydraulic cylinders 6 are controlled automatically.) this gripping levers 7 rotate around the axes 8 and 9 and begin to clamp the tree trunk (see figure 3). At the same time (starting from the moment the tree trunk is clamped), the body 1 with the boom 2 continues to move non-stop relative to the carriage 5 until the tree is sawn with saw cutters 11. In this case, the rods (not shown) are completely “retracted” into the bodies of the hydraulic cylinders 6 (see. FIG. four).

Before the completion of the sawing process of the tree (with the continuing movement of the body 1), the supporting prism 3 is automatically brought by the hydraulic cylinder 4 to the trunk of the tree being sawn, and after the sawing is completed by the continued movement of the boom 2, the tree is pushed from the bridge. In this case, the reference prism 3 and the arrow 2 sets the direction of the tree felling (with further movement of the reference prism 3 relative to the housing 1).

Upon completion of the directed tree felling operation, the carriage 5 and the gripping arms 7 return to their original position, while the rods (not shown in the drawing) are completely "extended" from the cylinder body (not indicated in the drawing) 6. The reference prism 3 is returned to its original position.

The gripping-cutting device is ready to carry out the next cycle of felling a tree or cutting branches by the same gripping-cutting device by means of a delimbing device of any known design mounted on a gripping-cutting device.

The inventive gripping-cutting device for harvesting trees has the following advantages: the process of directional felling of the tree from the moment it is touched by the gripping-cutting device until it is laid on the ground is carried out by continuous movement of the boom of the manipulator in automatic mode, which allows to increase labor productivity.

An additional advantage of the gripping-cutting device is the presence of an internal cavity that acts as a “storage pocket” for laying fine trees, which also helps to increase labor productivity.

Claims (3)

1. The gripping-cutting device for harvesting trees, including a housing pivotally mounted on the boom of the manipulator, a carriage with a movement mechanism, which is installed in the guides of the body with the possibility of reciprocating movement, a saw mechanism with a drive and gripping levers, characterized in that the gripping levers pivotally mounted on the carriage and pivotally connected to the mechanism of its movement, which at the other end is pivotally connected to the housing of the gripping-cutting device. 2. The gripping-cutting device according to claim 1, characterized in that the mechanism for moving the carriage is made in the form of hydraulic cylinders that are connected to the housing with the formation of an internal cavity. 3. The gripping-cutting device according to claim 1, characterized in that it is additionally equipped with a delimbing device.

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