KR101638457B1 - Knife and knife device for grass cutter - Google Patents

Abstract

The present invention relates to a grass cutter. The grass cutter comprises: a blade which has a blade part and a blade holder; and upper and lower plates which are to couple the blade. Protruding parts, which have two or more blade holder insertion grooves at uniform intervals, are formed in either the upper plate or the lower plate. Protrusion insertion grooves where coupling protrusions are to be coupled are formed between the blade holder insertion grooves of the protruding parts. The upper and lower plates coupled through the coupling protrusions and the protrusion insertion grooves are coupled to a fastener. Thus, the present invention enables the simple manufacture of the grass trimmer as a cutting part, a pair of extension parts, and a separation preventing part are formed to be integrated and reduces failure as the structure of the grass trimmer is simple.

Description

[0001] Knife and knife device for grass cutter [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a blade for lawn mower and a lawn mower using the same, and more particularly to a lawn mower blade capable of cutting the most efficiently when cutting weeds and lawn mowers, and a lawn mower capable of efficiently laid mowing using the same.

Generally, a lawn mowing machine is a device for cutting a weed, a knife, and the like by rotating a kneading blade at a high speed by a rotational force of a power device such as a motor or an engine.

The lawn mower can be divided into two types depending on the target of work, for example, a bean curd, a grass herb, and a brush. The above attachment type is a method in which a worker puts a lawn mower on a back or shoulder, and a pulling type is a method in which a lawn mower is put on the ground and an operator pushes or pulls the lawn mower.

In addition, the lawn mower is divided into a reciprocating blade, a rotary blade, a fixed blade, a hauling-out blade, and an articulating blade in accordance with the type of the mowing blade. Among them, the articulated mowing blade is recently in the spotlight due to its structural simplicity.

Particularly, the articulated kneading knife is made of a steel wire, etc., and 3 ~ 4 joints are formed at 90 or 120 ° equidistant intervals on the outer periphery of a circular wheel rotating at high speed. It is easy to manufacture and handle, It has a great advantage in securing safety because it is less likely to scatter fragments when it comes in contact with stones and metals in the course of carrying out the present invention. However, since it has a considerable breaking force for cutting grass, grasses and weeds, Have.

However, since the articulated knife blade has a complicated structure of a hanger for connecting the knife blade to the case and the joint method is inconvenient as well as the articulation structure is connected to several parts, the breakdown is frequent, In addition, unlike the user's intention, the articulated knife blade is loosened or disengaged arbitrarily in the course of use.

[Prior Art Literature]

1. Patent application number: 10-2011-0060463

In order to solve the above-mentioned problems, the present invention provides a simple structure for joining a case with a case, and a joint structure of a knife blade and a knife holder is as simple as possible, thereby facilitating fabrication and troubleshooting, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a mower blade capable of efficiently performing mowing work while keeping the safety of an operator, and a mower using the same.

According to an aspect of the present invention, there is provided a cutting blade for a grass cutter according to an embodiment of the present invention. The cutter blade has a cutting blade at one side and a through hole at the other side. The blade hanger includes a pair of extending portions extending from one end of the bent portion and a bending portion bent at a predetermined angle from an end of the extending portion. .

According to another embodiment of the present invention, the blade is configured to have a tapered shape in which the width of the cutting edge widens as the blade moves away from the through hole.

The lawn mower using the knife for lawn mower according to the present invention comprises a lawn mower blade having a blade and a blade hanger and an upper plate and a lower plate for coupling the lawn mower blade. A protrusion for allowing at least two insertion holes for inserting the detachment prevention part to be inserted is formed at a distance of at least two, and a coupling protrusion formed on the plate on the other side is inserted between the insertion holes of the protrusions, And the upper plate and the lower plate coupled by the engagement of the engagement protrusions with the projection insertion grooves are coupled to each other by a fastener by a fastener coupling hole drilled at the center.

According to another embodiment of the present invention, the blade slot insertion groove is formed by a longitudinal groove formed at the center of the lateral groove and the lateral groove, and an extended portion of the blade slot is inserted into the longitudinal groove, So that the earth is inserted.

According to the effect of the present invention as described above, since the blade hanger bends one iron bar and the bending portion, the pair of extensions, and the departure-avoiding portion are integrally formed, the blade hanger is simple to manufacture and has a simple structure.

Further, the blade portion is structured so as to be caught by the bent portion through the end of the detachment preventing portion of the blade hanging hole by the through hole formed at one side, so that no parts are required in forming the joint.

In addition, the blade hook assembly has a structure in which the blade is coupled with the case, and when the blade holder is inserted into the blade slot insertion groove, the coupling with the case is completed.

As described above, according to the present invention, the joint structure with the case is simplified, and the joint structure of the blade and the blade holder is as simple as possible, thereby facilitating fabrication and troubleshooting, minimizing the disengagement of the blade from the case, But it is a very useful invention that can be efficiently mowed.

1 is a perspective view of a mower blade according to an embodiment of the present invention;
2 is an exploded perspective view of a lawn mower according to an embodiment of the present invention;
Figure 3 is a perspective view of the combined state of Figure 2;
Figure 4 is a cross-sectional view of Figure 3;
5 is a use state reference diagram of Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. Also, the singular forms used herein include plural forms as long as the phrases do not expressly mean the opposite. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like. Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further construed to have meanings consistent with the relevant technical literature and the present disclosure and are not to be construed as ideal or official unless defined otherwise.

The embodiment of the present invention described with reference to the perspective view specifically illustrates an ideal embodiment of the present invention. As a result, various variations of the illustration, for example variations in the manufacturing method and / or specification, are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture. For example, the regions shown or described as being flat may have characteristics that are generally coarse / rough and nonlinear. Also, the portion shown as having a sharp angle may be rounded. Thus, the regions shown in the figures are merely approximate, and their shapes are not intended to depict the exact shape of the regions, nor are they intended to limit the scope of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a lawn mower blade and a grass mower using the lawn mower according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a lawn mower blade according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a lawn mower according to an embodiment of the present invention, FIG. 3 is a perspective view of the lawn mower of FIG. 3 is a cross-sectional view of Fig. 3, and Fig. 5 is a use state reference diagram of Fig.

First, in the drawings, it is noted that the same components or parts are denoted by the same reference numerals as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The grass cutter blade 100 according to the embodiment of the present invention mainly comprises a blade cutter 110 and a blade 120.

The cutter 120 is formed of a metal body 121. A through hole 121a is formed at one side of the body 121 and a cutting edge 121b is formed at the other side.

At this time, it is preferable that the cutting edge 121b of the blade 120 is configured to be wider as the width is away from the through hole 121a. That is, the width h of the cutting edge closer to the through hole 121a has a tapered shape in which the gradually increasing width H becomes wider.

This is a structure required for increasing the efficiency of the cutting by loading a greater force on the outside of the cutting edge 121b when centrifugal force acts on the blade portion 120. [

The blade holder 110 has a bent portion 111 at one end thereof to which the through hole 121a of the blade portion 120 is fitted and is coupled to the blade holder 110. The blade holder 110 has a pair of bent portions 111 extending from both ends, And an escape prevention part 113 formed by being bent at a predetermined angle from an end of the extension part 112. [

At this time, the bending portion 111 must have a vertical shape, which is necessary to ensure that the blade portion 120 is rotated in a horizontal state.

The bending portion 111 has a curved shape so that the blade portion 120 is always positioned at the middle portion of the bending portion 111 so that a stable rotational force is applied.

The extension portion 112 is formed in a straight line. The separation preventing portion 113 formed by being bent at a predetermined angle from the end of the extending portion 112 may have a latching function . Therefore, the predetermined angle may be appropriate to the extent that the blade holder 110 is not detached in a state of being coupled with the case. However, it is natural that the right angle which takes the greatest force is desirable.

The lawn mower according to the present invention includes a lawn mower blade 100 including a blade 120 and a blade holder 110 and an upper plate 220 and a lower plate 210 for coupling the lawn mower blade. One of the plates or the bottom plate has a protruding portion 211 for forming at least two spaced apart blade catching slot insertion grooves 212 for insertion and insertion of the extension portion 112 and the separation preventing portion 113, And a protrusion insertion groove 213 is formed between the blade slot insertion grooves 212 of the protrusion for fitting the coupling protrusion 221 formed on the plate on the other side. The top plate and the bottom plate, which are coupled by fitting, are made to be coupled by fastening means by a fastening hole 220a formed at the center.

The blade slot insertion groove 212 is formed in a longitudinal groove 212a formed at a middle portion between the lateral grooves 212b and the lateral grooves 212b and an extension portion 112 of the blade slot is formed in the longitudinal groove 212a. And the transverse grooves 212b may be formed in such a manner that the escape ribs 113 of the blade catches 110 are inserted into the lateral grooves 212b to be caught by the engaging protrusions 212c.

The bent portion 111 of the blade 120 is formed at the outer portion of the protrusion 211 and the inner portion of the upper plate 220 and the lower plate 210 Lt; / RTI > In other words, only the cutting edge 121b of the blade is exposed on the outer side of the upper plate 220 and the lower plate 210. In other words,

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the present invention is not limited thereto and that various changes and modifications will be apparent to those skilled in the art. Various modifications and variations are possible within the scope of the appended claims.

100: Blade for mower of the present invention
110: blade hook 111: bent portion
112: extension part 113:
120: blade portion
210: lower plate 220: upper plate
211: protruding portion 212: blade slot insertion groove
212a: Vertical groove 212b: Horizontal groove
212c:
213: projection insertion groove 220a: fastener coupling hole
221: engaging projection

Claims (7)

delete delete delete delete And a lower plate for joining the grass blade for lawn mowing, wherein one of the upper plate and the lower plate has a protrusion, and the protrusion is provided with at least two And the protrusion insertion groove is formed in the protrusion insertion groove so that the protrusion insertion groove and the protrusion insertion groove are formed in the protrusion insertion groove, And the upper plate and the lower plate coupled by the engagement of the engagement protrusions with the projection insertion grooves are coupled to each other by the fastening holes by fastening hole holes drilled in the center,
The blade slot insertion groove is formed by a longitudinal groove formed at the center of the lateral groove and the lateral groove, and a pair of extended portions extending from one end of the bent portion of the blade slot are inserted into the longitudinal groove,
And a separation groove formed by being bent at a predetermined angle from the end of the extension of the blade hanging sphere is inserted into the lateral groove.
delete And a lower plate for joining the grass blade for lawn mowing, wherein one of the upper plate and the lower plate has a protrusion, and the protrusion is provided with at least two And the protrusion insertion groove is formed in the protrusion insertion groove so that the protrusion insertion groove and the protrusion insertion groove are formed in the protrusion insertion groove, And the upper plate and the lower plate coupled by the engagement of the engagement protrusions with the projection insertion grooves are coupled to each other by the fastening holes by fastening hole holes drilled in the center,
Wherein the bent portion of the blade hanger has a curved shape,
Wherein the bent portion of the blade hanging hole is formed at an outer portion of the outer side of the projecting portion and is formed inside the outer side of the upper plate and the lower plate.

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