RU195649U1 - Trimmer knife - Google Patents

Abstract

The knife for the trimmer relates to agricultural machinery, in particular to devices for the mechanical destruction of unwanted vegetation (Fig. 1). The knife for the trimmer consists of a bowl-shaped body hardened by heat treatment, with six horizontal and vertical cutting edges located on its outer circumference, protruding in the direction drives sharpened on one side, forming a common cutting edge having zones between horizontal and vertical cutting edges to remove cut grass Due to the bowl-shaped case, the trimmer knife mechanically destroys unwanted vegetation in the form of grass, shrubs, young shoots of trees in the field, as well as along the curb and walls. Due to the six horizontal and vertical cutting edges protruding on the outer circumference, they protrude in the direction of the drive , as well as zones between horizontal and vertical cutting edges to remove mowed grass, the trimmer knife performs sliding cutting in the form of constant contact of the cutting edge with grass eat, excludes repeated cutting and shredding of stems, removes the beveled mass from the cutting zone.

Description

The technical field to which the utility model belongs.

The utility model relates to agricultural engineering, in particular to devices for the mechanical destruction of unwanted vegetation.

The prior art.

The closest solutions to the claimed utility model include a cutting blade for grass for a trimmer (patent for invention No. RU 2642187 C2).

The grass cutting blade for a manual feed trimmer with an engine consists of a disk-shaped main body with cutting teeth located on its outer circumference. Each cutting tooth has a substantially radially directed front cutting edge protruding in the drive direction. The leading edge of the tooth adjacent to the leading cutting edge extends in the circumferential direction. The leading cutting edge, as well as the upper edge of the tooth, form a cutting edge. The leading cutting edge and the upper edge of the tooth are sharpened alternately on one and the other side of the cutting blade. The leading cutting edge and the upper edge of the tooth form a common tooth tip protruding in the drive direction. Grass cutting blade for trimmer is used to cut grass, dense shrubs or also young trees.

Due to the fact that the known device is made in the form of a disk, this device is not convenient for mowing grass on an uneven surface. Also, due to the fact that the cutting edge is made in the form of teeth and does not form a common cutting edge, this device does not reproduce the conditions for sliding cutting by a manual oblique and does not provide constant contact of the cutting edge with the grass stand.

The rotary working body of the mower is also known (patent document No. RU 2309573 C2). The rotary working body of the mower contains a rotor with a vertical axis of rotation and a cutting element. The cutting element is made in the form of a flat annular disk with a pointed outer edge mounted coaxially with the rotor and mounted on its lower base. The rotor is made in the form of a hollow truncated cone with an annular flange on the lower base and a spline hub at the upper base and has two curvilinear plates mounted obliquely on the surface of the rotor at an acute angle relative to the direction and plane of rotation.

The rotary working body of the mower has a drawback in the form of quick (transient) wear of the cutting ring disc, and as a result, removal of the rotor from the housing for maintenance.

The inventive utility model has a common cutting edge on the housing, the housing is hardened by heat treatment, and therefore the utility model provides a balanced mowing process, reducing the time required to service the cutting parts of the knife and ensuring a good cut of grass, shrubs, young shoots of trees both in the field and along the curb and walls.

Due to the presence of zones between horizontal and vertical cutting edges to remove mowed grass, the device provides removal of cut vegetation from the cutting zone and its further folding in one direction.

Disclosure of the essence of the utility model.

A knife for a trimmer with manual feed with an engine consists of a bowl-shaped body with six horizontal and vertical cutting edges located on its outer circumference, protruding in the direction of the drive (Fig. 1, Fig. 2).

The trimmer knife has zones between the horizontal and vertical cutting edges to remove mowed grass (Fig. 3).

The horizontal cutting edge (Fig. 4) is adjacent to the vertical cutting edge (Fig. 5).

The horizontal and vertical cutting edges form a common cutting edge.

Horizontal and vertical cutting edges are sharpened on one side (Fig. 6, Fig. 7).

The horizontal cutting edges lie in the same plane.

The body of the knife for the trimmer has holes for fixing on the trimmer drive.

The cup-shaped housing is made by plastic deformation and hardened by heat treatment.

The knife for the trimmer is made of AISI 420 stainless steel (hardness - 35-40 HRC).

A balanced mowing process, reducing the time spent on servicing the knife’s cutting parts and ensuring a good cut of grass, shrubs, young shoots of trees in the field, grass along the curb and walls, is achieved by the fact that the proposed trimmer knife is made in the form of a bowl-shaped case, hardened by heat treatment, with located on its outer circumference, with six horizontal and vertical cutting edges protruding in the drive direction, sharpened on one side and forming a common cutting edge.

The presence on the knife body for the trimmer of zones between horizontal and vertical cutting edges to remove mowed grass removes the cut vegetation from the cutting zone and further folds it in one direction.

The presence on the knife body for trimmer oval holes in the upper part of the body facilitate the weight of the knife.

When rotating in a horizontal plane with simultaneous translational motion, the utility model provides optimal sliding cutting mode, constant contact of the cutting edge with the grass stand, eliminating repeated cutting and fading of the stems.

Reducing the cost of maintenance and dressing of the cutting edge of the knife, increased wear resistance of the cutting edges and increase the service life of the knife is achieved by heat treatment of the case and giving it increased hardness.

The utility model is illustrated by drawings:

FIG. 1 - General view of the knife for the trimmer from above;

FIG. 2 - a general view of the knife from the side;

FIG. 3 - a zone of removal of mowed grass;

FIG. 4 - horizontal cutting edge;

FIG. 5 - vertical cutting edge;

FIG. 6 - section of a horizontal cutting edge;

FIG. 7 is a section of a vertical cutting edge.

Implementation of a utility model.

The trimmer knife is used in a manual feed mower with an engine. Due to the bowl-shaped case, the trimmer knife mechanically destroys unwanted vegetation in the form of grass, shrubs, young shoots of trees in the field, as well as along the curb and walls.

Due to the six horizontal and vertical cutting edges located on its outer circumference, protruding in the direction of the drive, as well as the zones between the horizontal and vertical cutting edges to remove mowed grass, the trimmer knife performs sliding cutting in the form of constant contact of the cutting edge with the grass stand, eliminating repeated cutting and grinding stems, removes the beveled mass from the cutting zone.

Claims (3)

1. The knife for the trimmer, consisting of a body with six horizontal and vertical cutting edges located on its outer circumference, protruding in the drive direction, sharpened on one side, characterized in that the horizontal and vertical cutting edges form a common cutting edge. 2. The knife for the trimmer under item 1, characterized in that it is made in the form of a bowl-shaped body, hardened by heat treatment. 3. The knife for the trimmer according to claim 1, characterized in that the zones between the horizontal and vertical cutting edges for removing mowed grass are made on a bowl-shaped body.

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