RU196832U1 - Trimmer Cutting Tool - Google Patents

Abstract

The utility model relates to a cutting tool used when a trimmer is used to mow any kind of vegetation. A cutting tool for a trimmer is proposed, comprising a body made of a single steel sheet with a peripheral region, which is formed by cutting teeth with cutting edges and depressions located between the cutting teeth and the central region in which the mounting holes are made. The peripheral region is located outside the central region and surrounds the latter. The steel sheet contains a closed region of residual plastic deformation, placed between the peripheral region and the Central region, through which the peripheral region is provided outside the Central region and below it. The central region is concave, each individual cavity is formed as a cutting element, and the cutting edge is distributed between the cutting teeth and the cutting elements. The peripheral region is further provided with stiffening ribs in the form of bulges made on each cutting tooth and each cutting element. The device provides increased rigidity. 6 ill., 3 ave.

Description

FIELD OF TECHNOLOGY TO WHICH A USEFUL MODEL IS.

The inventive utility model relates to a cutting tool used when operating a trimmer designed to mow any kind of vegetation - such as grass, dead wood, small shrubs. The inventive utility model can be used to mow any kind of vegetation when connected to a trimmer drive.

BACKGROUND OF THE INVENTION

The main problem associated with the use of a cutting tool for the trimmer (hereinafter also the cutting tool) is its lack of rigidity. The presence of this drawback is dictated by the fact that as the body of the cutting tool use a steel sheet of a flat shape, which is devoid of special tools that provide increased rigidity. The insufficient rigidity of the cutting tool has a negative impact on both its operation and the operation of the trimmer itself. With insufficient rigidity of the cutting tool, its spontaneous vibrations are carried out, which leads to a change in the trajectory of the cutting tool and the height of the cut of the plants. The specified disadvantage affects the safety of the operator, and also leads to increased fatigue. There is a need to create a cutting tool that is devoid of this significant drawback. The identified problem of the cutting tool for the trimmer is significant and needs to be resolved.

Known cutting element for the trimmer, made in the form of fishing line with an abrasive, and one part of the abrasive is fixed in the body of the fishing line, and the other part of the abrasive is on the surface of the fishing line, forming a cutting tool for mowing vegetation (RU 183475 U1, published September 24, 2018, Bull. No. 27). This cutting element has limited functionality, as cannot be used effectively for mowing small shrubs and dead wood, which is explained by the type of cutting tool used.

Known cutting element for a trimmer containing a solid base made in the form of a cross with a mounting hole, and cutting elements, moreover, 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 with the possibility of angular movement a cutting element is installed, while the cutting element is made in the form of replaceable knives from tool steel (RU 183516 U1, published September 25, 2018, Bull. No. 27).

This cutting element is structurally complex, because contains more than one part. As a general rule, an increase in the number of parts in a device complicates the design of the device.

Also known is a cutting tool for a trimmer, comprising a body made of a single steel sheet with a peripheral region and a central region, a peripheral region formed by cutting teeth with cutting edges and depressions located between the cutting teeth, mounting holes are made in the central region, the peripheral region is located outside the central region and surrounds the latter (RU 2642187 C2, published January 24, 2018, Bull. No. 3). A disadvantage of the known cutting tool for the trimmer is that it has insufficient rigidity for the purpose of effective use for its intended purpose. The presence of this drawback is due to the fact that the cutting tool is made of steel sheet and does not contain special structural elements that provide increased rigidity of the cutting tool. In the absence of special structural elements providing increased rigidity of the cutting tool, methods associated with the use of expensive steel alloys, as well as with their heat treatment for the purpose of stiffening, are used. However, it should be noted that the methods used make it impossible to use stamping to obtain a cutting tool, because not all steel alloys are subject to stamping. Rigidity - the ability of a body or structure to resist the formation of deformations under external influence.

Technical problem: the known cutting tool for the trimmer has insufficient rigidity due to the lack of special structural elements aimed at increasing the rigidity of the device. There is an urgent need to expand the arsenal of tools for the intended purpose by creating a new cutting tool for the trimmer, providing the required rigidity.

Actual circumstances indicate that there is a need to expand the arsenal of means for a certain purpose by creating a new device with increased stiffness, capable of showing the desired purpose, inherent in a device with the generic concept of “Cutting tool for trimmer”.

The problem to which the claimed utility model is directed: expanding the arsenal of means for a specific purpose by creating a new device "Cutting tool for trimmer", increasing its rigidity.

Effect: implementation of the purpose, increasing the rigidity of the cutting tool for the trimmer.

The resulting technical result is basic: the implementation of the purpose. The resulting technical result is additional: increased rigidity.

The technical result is a characteristic of the technical effect, phenomena, properties, etc., objectively manifested in the manufacture or use of the device.

As a general rule, if the creation of a utility model solves the problem of expanding the arsenal of technical means of a particular purpose or obtaining such means for the first time, the technical result consists in realizing this purpose.

As a general rule, if a utility model provides several technical results, it is recommended to indicate all technical results.

The technical result is presented by the applicant in such a way as to provide an opportunity for understanding by a specialist on the basis of the prior art of its semantic content.

The applicant disclosed the problem, the solution of which the claimed utility model is aimed at, indicating the technical result provided by him.

DISCLOSURE OF THE ESSENCE OF A USEFUL MODEL

The essence of the utility model as a technical solution related to the device is expressed by the applicant in the aggregate of essential features sufficient to achieve the technical result provided by the utility model. It is the claimed combination of features of the utility model that is necessary for the implementation of the destination model specified in the generic concept, as well as obtaining a technical result.

The essence of the claimed utility model is that in a cutting tool for a trimmer containing a body made of a single steel sheet with a peripheral region and a central region, the peripheral region is formed by cutting teeth with cutting edges and depressions located between the cutting teeth, in the central region mounting holes, the peripheral region is located outside the Central region and surrounds the latter, according to the known technical solution, in it the steel sheet contains a closed region of residual plastic deformation placed between the peripheral region and the central region, by means of which the peripheral region is provided outside and below the central region, the central region being concave, each individual cavity being formed as a cutting element, and the cutting edge is distributed between cutting teeth and cutting elements, while the peripheral region is additionally equipped with stiffeners in the form of bulges made on each cutting m tooth and each cutting element.

The presented features of the claimed utility model are significant, because they affect the ability to solve the specified technical problem and obtain a technical result, that is, they are in a causal relationship with the specified result.

The essence of the utility model as a technical solution is expressed in the aggregate of essential features necessary and sufficient to achieve the technical result provided by the utility model. It is the claimed combination of essential features of a utility model, formed by generic and species characteristics, that is necessary for the implementation of a useful destination model and the achievement of a technical result.

For the claimed utility model and the selected prototype, common essential features are inherent:

- a body made of a single steel sheet with a peripheral region and a central region;

- the peripheral region is formed by cutting teeth with cutting edges and depressions located between the cutting teeth;

- installation holes are made in the central region;

- the peripheral region is located outside the central region and surrounds the latter.

The claimed utility model differs from the prototype in a new set of essential features:

- the steel sheet contains a closed region of residual plastic deformation, placed between the peripheral region and the Central region, through which the placement of the peripheral region outside the Central region and below it;

- the central region is concave;

- each individual cavity is formed as a cutting element;

- the cutting edge is distributed between the cutting teeth and the cutting elements;

- the peripheral region is additionally equipped with stiffeners in the form of bulges made on each cutting tooth and each cutting element.

As a general rule, only a set of essential features can be included in a utility model formula that ensures the achievement of a technical result and the implementation of an assignment, and therefore, a direct causal relationship should be traced between the set of essential features of an independent claim of a utility model formula and the claimed technical result.

Analysis of the common features inherent in the known technical solution and the claimed utility model to be included in the restrictive part of the utility model formula for the subject of materiality.

The sign “a body made of a single steel sheet with a peripheral region and a central region” is significant, is presented at the level of functional generalization. The specified sign affects the implementation of the appointment, because in the absence of the indicated feature, the device cannot realize the purpose.

The sign "the peripheral region is formed by cutting teeth with cutting edges and depressions located between the cutting teeth" is significant, affects the implementation of the appointment, because in the absence of the indicated feature, the device cannot realize the purpose.

The sign “installation holes are made in the central region” is significant, it affects the implementation of the assignment, because in the absence of the indicated feature, the device cannot realize the purpose.

The sign “the peripheral region is located outside the central region and surrounds the latter” is significant, affects the implementation of the appointment, because in the absence of the indicated feature, the device cannot realize the purpose.

An analysis of the distinguishing features of the claimed utility model to be included in the distinctive part of the utility model formula for materiality.

The sign "the steel sheet contains a closed region of residual plastic deformation, located between the peripheral region and the Central region, through which the peripheral region is provided outside the Central region and below it" is significant, indicate a specific location of the structural element of the device. This feature relates to a structural element of the claimed device, which affects the achievement of the claimed technical result in terms of increasing the rigidity of the device.

The sign "the Central region is made concave" is an essential structural element of the claimed device. This feature has an effect on the achievement of the claimed technical result in terms of increasing the rigidity of the device.

The sign "each individual cavity is formed as a cutting element" is an essential structural element of the claimed device. This feature has an effect on the achievement of the claimed technical result in terms of increasing the rigidity of the device. It is the execution of each individual cavity in the form of a separate cutting element that provides increased rigidity of the cutting tool, i.e. ensures the achievement of the claimed technical result.

The sign "the cutting edge is distributed between the cutting teeth and the cutting elements" is an essential structural element of the claimed device. The specified attribute affects the implementation of the appointment.

The sign "the peripheral region is additionally equipped with stiffening ribs in the form of bulges made on each cutting tooth and each cutting element" is an essential structural element of the claimed device. This feature has an effect on the achievement of the claimed technical result in terms of increasing the rigidity of the device. It is the implementation of structural elements - stiffening ribs in the form of bulges on each cutting tooth and each cutting element, which increases the rigidity of the cutting tool as a whole.

The presented analysis of the distinctive features inherent in the claimed utility model indicates that they are significant, affect the achievement of the technical result and the purpose of the device, are in a causal relationship with the claimed technical result, and, therefore, should be included in the distinctive part of the formula utility model.

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 is a top view of a cutting tool for a trimmer (hereinafter also a device); in FIG. 2 is a section G-D of FIG. 1; in FIG. 3 is a section AA of FIG. 1; in FIG. 4 is a section BB of FIG. 1; in FIG. 5 is a top view photograph of a cutting tool for a trimmer; in FIG. 6 is a bottom view photograph of a cutting tool for a trimmer. In FIG. 2, the letter D denotes the horizontal plane necessary to explain the execution of the central concave region and below the plane D. Photos are presented to provide a more complete understanding of the essence of the claimed utility model, because the device contains a large number of transition lines, which leads to difficulty in perceiving the essence of the technical solution.

IMPLEMENTATION OF A USEFUL MODEL

The cutting tool for the trimmer contains the following elements: the outer section 1 (see Fig. 1, 2, 5, 6), the area of residual plastic deformation 2, the cutting teeth 3, the cutting elements 4, the mounting holes 5, 6, 7, the inner section 8 , cutting edges 9, 10, stiffeners 11, 12 (see Fig. 3, 4).

Elements of the device: cutting teeth 3, cutting elements 4, cutting edges 9, 10, stiffeners 11, 12 form a peripheral region.

Elements of the device: the outer section 1, the mounting holes 5, 6, 7, the inner section 8 form the Central region.

A trimmer cutting tool comprising a body made of a single steel sheet with a peripheral region and a central region. The peripheral region is located outside the central region and surrounds the latter. The steel sheet contains a closed region of residual plastic deformation 2 (see Fig. 1, 2, 5) located between the peripheral region and the central region, by means of which the peripheral region is arranged outside and below the central region. The central region is concave, i.e. below the horizontal plane D (see Fig. 2). Each individual cavity is formed as a cutting element 4. The cutting edge is distributed between the cutting teeth 3 and the cutting elements 4. The peripheral region is additionally provided with stiffeners 11, 12 (see Fig. 3, 4) in the form of protuberances made on each cutting tooth 3 and each cutting element 4.

Example 1

To obtain the device used a steel sheet with a thickness of 1.5 mm The steel sheet was made of chrome structural alloy steel grade 15X. The dies needed to make the device were made. The device was obtained by the known method of cold forming, i.e. without heating the steel sheet preform shown in FIG. 5, 6. To obtain the device used a blank of steel sheet, stamp and press. The resulting device had a diameter of 185 mm and a height of 28 mm.

Example 2

To obtain the device used a steel sheet 1.8 mm thick. The steel sheet was made of structural alloy steel grade 20HG. The dies needed to make the device were made. The device was obtained by the known method of cold forming, i.e. without heating the steel sheet preform shown in FIG. 5, 6. To obtain the device used a blank of steel sheet, stamp and press. The resulting device had a diameter of 185 mm and a height of 28 mm.

Example 3

To obtain the device used a steel sheet with a thickness of 1.4 mm The steel sheet was made of structural alloy steel 18HGT. The dies needed to make the device were made. The device was obtained by the known method of cold forming, i.e. without heating the steel sheet preform shown in FIG. 5, 6. To obtain the device used a blank of steel sheet, stamp and press. The resulting device had a diameter of 185 mm and a height of 28 mm.

The device is used as follows.

The device is fixed to the trimmer drive elements by means of fasteners which are placed in the mounting holes 5, 6, 7. The device has the operating position shown in FIG. 1, 2, 5. By means of a trimmer drive, a device that is used for its intended purpose is driven into rotation. Dismantling the device is carried out in the reverse order.

Numerous experiments with the claimed device, which was made while maintaining a set of essential features, which are reflected in the independent claim of the utility model, showed that the device has the required stiffness, implements the purpose, and provides the claimed technical result.

All the above information allows us to come to the following reasonable conclusions.

The claimed utility model is a technical solution related to the device, because the utility model formula contains a set of essential features related to the device, sufficient to solve the technical problem indicated by the applicant and achieve the technical result provided by the utility model.

From the above list of features of the claimed utility model and the solution of the problem, it is clearly seen that the solution is a new set of essential features, as a combination of known and new features, providing a new technical result, unknown at the filing date of this application.

The inventive utility model provides a solution to the problem and obtain a new technical result, which can actually be obtained using it. Between the totality of the essential features of the claimed utility model and the achieved technical result, there is a direct causal relationship, because each of the signs of an independent claim of a utility model formula is necessary, and together sufficient to provide a new technical result. Each essential feature of a utility model that finds expression in an independent paragraph of the utility model formula affects the achievement of the above technical result.

Each feature of the utility model presented in the independent paragraph of the formula of the utility model is essential, and their combination forms the aggregate of essential features of the utility model that influence the achievement of a technical result. The features of the utility model, characterizing the mutual placement of the individual elements of the device relative to each other, the implementation of the individual elements of the device in a certain way, are significant, because exert their influence on achieving a technical result and solving a technical problem.

The inventive utility model is industrially applicable, because It can be used for its intended purpose in industry, agriculture, healthcare and other sectors of the economy or in the social sphere where devices of the declared purpose are used. The claimed utility model can be reproduced in the form as described in the independent claim of the utility model using known and available materials, technologies, technological equipment and available skills of workers. In the case of the implementation of the utility model, it is really possible to realize the above purpose and obtain the claimed technical result. For the manufacture of the elements of the device using well-known materials, processes and equipment.

The inventive utility model is new, because it is unknown in the prior art. Not known from the prior art, the set of essential features of the claimed utility model and their impact on obtaining the claimed technical result.

The essential features of the utility model are technical in nature, identifiable and characterized in terms that are known in the art.

The set of essential features of the claimed utility model is necessary and sufficient to obtain the claimed technical result. The inventive combination of features of a utility model provides an unexpected, overwhelming technical result that exceeds the technical result obtained from each significant feature separately, as applied to objects of the specified purpose.

The claimed utility model meets the patentability conditions stipulated by the first paragraph of paragraph 1 of Article 1351 of the Civil Code of the Russian Federation (hereinafter - the Code): it is a technical solution related to the device, the indicated technical result is achieved, there is a causal relationship between the features of the claimed utility model and the specified technical As a result, the description of the utility model contains the rationale for achieving the technical result provided by the utility model, the utility model does not contradict the known laws of nature and the knowledge of modern science about them.

The applicant complied with the requirements for the application documents provided for by subparagraphs 1-4 of paragraph 2 of Article 1376 of the Code. The description of the utility model reveals it with the completeness sufficient for the implementation of the utility model by a person skilled in the art. The application documents contain information on the purpose of the utility model, on the technical result provided by the utility model, a set of essential features necessary to achieve the technical result indicated by the applicant is disclosed. The applicant has complied with the established requirements for the application documents used in disclosing the essence of the utility model and disclosing information about the feasibility of implementing the utility model.

The applicant has complied with the requirements established by subparagraph 3 of paragraph 2 of Article 1376 of the Code for the content of the utility model formula.

Thus, the claimed utility model is a device that meets the required conditions of patentability of the utility model (novelty, industrial applicability), the description of the utility model reveals its essence with the completeness sufficient for the implementation of the utility model by a person skilled in the art, the utility model provides the claimed technical result, solution of the task.

Claims (1)

A cutting tool for a trimmer comprising a body made of a single steel sheet with a peripheral region and a central region, a peripheral region formed by cutting teeth with cutting edges and depressions located between the cutting teeth, mounting holes are made in the central region, the peripheral region is outside the central region and surrounds the latter, characterized in that the steel sheet contains a closed region of residual plastic deformation located between the peripheral region astyu and the Central region, through which the peripheral region is provided outside the Central region and below it, while the Central region is made concave, each individual cavity is formed as a cutting element, and the cutting edge is distributed between the cutting teeth and cutting elements, while the peripheral the region is additionally provided with stiffeners in the form of bulges made on each cutting tooth and each cutting element.

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