RU2235456C1 - Debranching head - Google Patents

Abstract

FIELD: forestry engineering.

SUBSTANCE: disbranching head has casing and levers mounted on pins inside casing. Levers are connected with one another through tie-rods. Levers have two halves with movable and immovable knives. Movable knives are mounted on said halves in staggered arrangement.

EFFECT: improved quality of cleaning of trees from branches, in particular, thin-measured trunks.

2 dwg

Description

The invention relates to equipment for the forest industry.

Known cutting units of delimbing machines, for example LO-27 and various modifications of this device. The cutting unit has a bed on which levers are pivotally mounted using fingers. Knives with curved cutting edges made on a second-order parabola are hinged with holders at the free ends of the levers. For the supply of holders with knives to the tree and their return outlet, hydraulic cylinders are mounted on the bed, which are pivotally connected to the levers, and the base - to the bed. To cut the branches, the tree is laid on top of the machine, the holders of which are in a diluted position. Then the holders with the hydraulic cylinder with the help of levers are reduced to contact with the side surface of the tree. The tree is informed of the forward movement of the butt forward. When moving the tree, the holder with knives, pressed by the hydraulic cylinders, copy the surface of the tree trunk (AS No. 209902, class 45f, 23/08; 38i, 1/08).

A disadvantage of the known design is poor-quality cleaning of trees from knots due to the use of two knives, which does not allow for the necessary copying of knives on the side of the tree.

Known delimbing head machine LP-33. The head consists of a welded body, two levers with knives and an upper knife. The levers are installed in the housing on the axles, interconnected by a rod and driven by a hydraulic cylinder. The upper knife is mounted on a different axis. To cut the branches, the tree is fed between the levers of the delimbing head, which are pressed against it by the hydraulic cylinder. The tree is informed of translational motion. When moving the trunk, the knots are trimmed with levers with knives and an upper knife (a.s. No. 334057, class B 27 L 1/00).

A disadvantage of the known design is poor-quality cleaning of trees from knots due to the use of two knives, which does not allow for the necessary copying of knives on the side of the tree.

Known design delimbing head, comprising a housing, levers mounted in the housing on the axles and having two half heads with movable and fixed knives (US 4766939A, CL B 27 L 1/00, 1988, p. 9, figure 1). To cut branches, the tree is fed between movable knives, which are pressed against it by hydraulic cylinders. When moving the trunk, the knots are trimmed with movable and fixed knives.

A disadvantage of the known design is also poor-quality cleaning of trees from knots.

The invention solves the problem of the mechanization of operations for cleaning reservoir beds from reforestation after the main forest removal works. Renewable forest is not marketable wood, cutting thin toner and rods requires the use of non-traditional cutting devices. The use of currently used technologies for cleaning cutting areas from logging residues requires a lot of manual labor and, therefore, is inefficient.

The technical result consists in improving the quality of cleaning trees from knots, in particular fine trunks.

To achieve the specified technical result in a delimbing head, comprising a housing, levers mounted in the housing on the axles and having two half heads with movable and fixed knives, according to the invention, the movable knives are staggered.

The use of two half heads makes it possible to improve the quality of cleaning trees from knots while reducing the size of the head itself.

The arrangement of levers with movable knives in a checkerboard pattern also allows you to reduce the size of half heads and improve the quality of cleaning trees from branches.

Figure 1 presents a diagram of the delimbing head; figure 2 is a section along aa of figure 1.

The delimbing head consists of a body 1 of a welded structure, levers 2 and 3, on which the left and right half heads 4 and 5. are mounted. The levers 2 and 3 are installed in the body 1 on the axles 6, are interconnected by a rod 7 and are driven by a hydraulic cylinder 8. The left half-head 4 consists of a body of a welded structure 9, a front movable knife 10, a rear movable knife 11. The right half-head 5 consists of a body of a welded structure 13, a front movable knife 14, a rear movable knife 15. The movable knives 10, 11, 14, 15 are mounted on axes 12 and 16 in chessboard dke. The movable knives 10, 11, 14, 15 are driven by hydraulic cylinders 17, 18. There are fixed knives 19 on both half heads. The movement of the knives is limited by an emphasis 20.

The delimbing head operates as follows. Between the extended half heads 4 and 5, a tree is fed. Then half-heads 4 and 5 of the hydraulic cylinder 8 are reduced to contact with the side surface of the tree, it is covered by movable knives 10, 11 and 14, 15. The progressive movement is reported to the tree. When moving the trunk through the delimbing head, the knots are trimmed with movable knives 10, 11 and 14, 15 and fixed knives 19.

The use of a delimbing head will improve the quality of cleaning trees (including fine trees) from knots and will allow solving the problem of mechanizing the operation of cleaning reservoir beds from reforestation shoots after the main forest removal works.

Claims (1)

A delimbing head including a housing, levers mounted on axles in the housing and having two half heads with movable and fixed knives, characterized in that the levers are connected by a traction and the movable knives are mounted on the half heads in a checkerboard pattern.

Images