RU183516U1 - TRIMMER DISC - Google Patents

Abstract

The utility model relates to mechanical ejectors equipped with a disc, in particular to cutting devices with several cutting knives. The trimmer disk is made in the form of a solid base, made in the form of four petal crosses. At the ends of each of the petals, a connecting hole is made. In the latter is installed, with the possibility of angular movement, a cutting element made in the form of a knife. When the trimmer disc is rotated in a brush cutter (electric cutter), the cutting knives under the action of centrifugal forces take a working position. When the cutting knife hits the trimmer disk against an obstacle, the knife is folded into the cross of the base, preventing damage to the entire trimmer disk, and eliminates shaft breakage or damage to the brushcutter gearbox (electric braids). The trimmer disc does not require sharpening cutting knives and has no wearing parts. In the event of a breakage of the cutting knife, the declared disc trimmer is easily repaired by replacing the knife in the field.

Description

The utility model relates to mechanical cutting devices with several cutting edges, namely, it is mounted on a manual gasoline (electric) scythe and is intended for mowing grass.

Known mini-tractor, comprising a housing, engine and propulsion, equipped with a rotary mower with a working width of, for example, 1350 mm (Patent No. 21575 RU. Publ. 27.01.2002).

However, the known mini-tractor has a cantilever mower, a rotary mower, as attachments, made to a certain width and depth of capture of the treated surface and not intended, due to the complexity of the design, for installation on hand braids.

A device "Lawn trimmer" for use in lawn trimming and gardening, in which the chassis has a pair of axially aligned and independently controlled drive wheels, contains a grass trimmer, a pivotally mounted lever that can be rotated at one end on the chassis (Patent No. US 4663920 Publish. 05/12/1987).

However, the well-known "Lawn trimmer" has a trimmer mounted on the lever of the gripping means at a distance from the chassis. It is also used as attachment to a mechanical chassis.

A known gardening machine in which the reciprocating movement of the movable blades performs cutting, while one end of the cutting tool is engaged with one main body part (Publication No. JP 11266702. Publ. 05.10.1999).

However, the known gardening machine has a device such as scissors for reciprocating movement of movable blades, and is intended for cutting bushes.

Known manual trimmer having a housing, cutting means and a flat protective element, while the cutting means is located in front of the trimmer body, and a flat protective element is located further in front of and above the cutting means (Publication No. JP 2009045059. Publ. 05.03.2009).

However, the known manual trimmer has a flat cutting means with one cutting edge. In addition, the known device is not convenient for mowing grass on an uneven surface, with mass, high-speed cutting of grass.

Known bush trimmer for mass and high-speed cutting, in which, in accordance with the technical scheme, two sliding plates are located on the ground, a rotating tool is connected to the lower part of the sleeve, a gear crankshaft is mounted on the rotating tool, and a connecting rod connected to the upper knife and lower knife, respectively (Publication number CN 103493691. Publ. 08.01.2014).

However, the well-known bush trimmer for mass and high-speed trimming should have additional equipment in the form of a gantry installation with a diesel engine, transmission, and a rotary tool with two flat rotating knives that are not intended for use in manual electric trimmers.

Known petrol spit "Caliber", containing the engine casing, shaft rod, protective cover, line cutter, cutting knife, clutch housing, clutch handle (Operation Manual. Fig. 6. Electronic resource: wwwkalibrcompany.ru).

However, the well-known cutting knife, has a one-piece design, equipped with three teeth, is not convenient for storage, the braid gearbox or braid shaft often breaks down, acquires bends, cracks in the cutting disc in contact with solid objects, does not achieve the desired mowing quality and does not prevent operator fatigue. In addition, the well-known all-metal trimmer disc requires sharpening and has wear parts.

Known rotary cutter tow type, which contains a housing for mounting pairs of blades by means of a holder and a second holder containing a square flat plate having a pair of identical rod sections (US 5673545 A. Publ. 07.10.1997).

However, in a known towed-type rotary cutter, the cutting element is made in the form of a blade equipped at the end with a cutting section in the form of a blade. In this case, the blades are fixed to each other by means of mounting sections without the possibility of folding during operation.

It is known that a lawn mower blade (hereinafter referred to as a blade) made entirely of flexible material of urethane elastomer obtained by casting, polyester-based urethane elastomers of established hardness, this material has a longitudinal elongation of less than five percent during rotation, and the cutting part is beveled and makes up half the width of the central section ( US 3343350 A. Publ. 09/26/1967).

However, in the known design of the lawn mower, the cutting element is made whole, in the form of a plate, and is equipped at the ends with a cutting edge. In the form of a cross of four petals, it is connected using an adapter that does not have pyramidal rounded petals. Blades with cutting edges do not have the ability to fold during operation.

The objective of this utility model is to expand the arsenal of tools in the form of a disk used in lawn mowers.

The technical result, which is manifested in the possibility of folding the blade during operation.

The problem is solved in that in the trimmer disk containing a solid base made in the form of a flat cross, equipped with a mounting hole, cutting elements, the cross is made in the form of four flat pyramidal petals with a rounded apex, at the ends of each petal there is a connecting hole in which is installed , with the possibility of angular movement, the cutting element made in the form of interchangeable knives, each of which is made of tool steel.

To expand the range of uses, it is advisable to perform the cutting elements in the form of a set of interchangeable knives of different lengths.

The present utility model is illustrated by a detailed description and diagrams in which:

FIG. 1 - shows the main view and the left view of the trimmer disk assembly, according to the utility model;

FIG. 2 - shows the main view and the left view of the cross, the same as in Fig 1;

FIG. 3, 4 - characterize the main view and the left view of the cutting elements in the form of interchangeable knives of different lengths.

The trimmer disk contains a solid base - cross 1 in the form of four pyramidal petals with a rounded top (Fig. 1, 2). A mounting hole 2 is made in the center of the crosspiece 1. Cutting elements in the form of knives 3, 4, 5, 6 are fixed to each of the four petals of the crosspiece by means of connecting units 7, 8, 9, 10. Each of the connecting unit is made of screw 11, washers 12 and nuts 13.

Each of the connecting node 7-10 is placed in the corresponding mounting hole 14, 15, 16, 17. Each of the cutting elements 3-6 is mounted with the possibility of angular movement. Each of the cutting elements 3-6 is made in the form of a knife, all the edges of which are cutting.

The blades of the cutting elements are made in the form of a set of interchangeable knives 3-6, of different lengths.

In one set, each of knives 3-6 is made of tool steel. The length of the knife is not more than 96.4 mm, the thickness is not more than 1 mm, the radius of the circle at the mounting end is not more than 11 mm (Fig. 3).

In the second set, each of knives 3-6 is made of tool steel. The length of the knife is not more than 171 mm, the thickness is not more than 1 mm, the radius of the circle at the mounting end is not more than 11 mm (Fig. 4).

Use the trimmer disc as follows.

Before installing the trimmer disk, check the mobility of the blades of the knives of the cutting elements 3-6, in relation to the cross 1 in the connecting node. Mobility is achieved by the gap between each cutting element 3-6 and the crosspiece 1 due to the design of each of the connecting nodes 7-10. Fasten the cross 1 to the spindle of the output gear of a manual gasoline (electric) mower. Check the alignment of the spider 1 on the support flange of the spindle.

Then the engine of a manual gasoline (electric) mower is started, the trimmer disk, with knives 3-6 installed on it, is brought closer to the soil topography and the grass is trimmed to the required size. When the trimmer disk is rotated in a manual gas mower (electric scythe), the cutting knives 3-6 under the action of centrifugal forces take the working position. When the cutting knife 3-6 of the trimmer blade hits an obstacle, the knife folds into the cross of the base 2. The position of one of the cutting knife 3-6, in such cases, is shown in FIG. one.

The proposed utility model is intended for use for mowing grass on lawns and household plots. The trimmer disc is easy to use in a variety of terrain.

In addition, the proposed trimmer disc eliminates shaft breakage or damage to the gasoline braid gearbox when the trimmer disc is in contact with solid objects. At the same time, it reduces engine overload.

The claimed disc trimmer, in the event of a breakage of the cutting knife, is easily repaired by replacing the knife in the field.

In addition, it is easy to store, prevents breakage, bending, cracking of the cutting disc when it comes into contact with solid objects.

The proposed utility model improves the quality of mowing grass and reduces operator fatigue.

Claims (2)

1. The trimmer disk containing a solid base made in the form of a cross with a mounting hole, and cutting elements, characterized in that the cross is made in the form of four flat pyramidal petals with a rounded top, at the ends of each of which there is a connecting hole in which angular displacement installed cutting element, while the cutting element is made in the form of interchangeable knives made of tool steel. 2. The disk according to claim 1, characterized in that the cutting elements are made in the form of a set of interchangeable knives of different lengths.

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