KR102317198B1 - Knife for farm mower - Google Patents

Abstract

The present invention relates to a mower blade for cutting crops. The mower blade for cutting the crops of the present invention can cut thick and tough, even moisture-free crops such as dry cornstalks after harvest. Also according to the present invention, a position is changed and used through rotation of a circular cutter body fastened to a connector coupled to a mower. Therefore, the blade of a blunt cutter can be displaced so that a sharp blade is arranged at a cutting position, so that continuous operation is possible. The mower blade for cutting the crops according to the present invention comprises: a connector having a central shaft hole for coupling the mower and a plurality of end unit first coupling surfaces respectively arranged at symmetrical positions; and a plurality of cutters having a circular body having the second coupling surface coupled to the first coupling surface of the connector, and the blade formed on the outer periphery of the body.

Description

Mower blade for cutting crops {KNIFE FOR FARM MOWER}

The present invention relates to a mower blade for cutting crops,

In more detail, it is possible to cut thick, tough, even moisture-free crops such as dry cornstalks after harvest, and by changing the position of the circular cutter body fastened to the connector coupled to the lawn mower, It relates to a lawnmower blade for cutting crops, which enables continuous operation by enabling the blade to be displaced so that the sharp blade is arranged at the cutting position.

Conventionally, various mower blades have been proposed.

As an example, there is Patent Laid-Open No. 10-2016-0035938 (April 01, 2016) [Mounter all sides blade],

This patent is designed to maximize the contact area with grass and reduce the rotational load of the blade so that the blade is cut by contact with the grass, rather than the existing mower blade being cut by hitting the grass, so that robustness and stability can be secured. and

The mower blade is formed on the left and right sides and both sides of the periphery to reduce the air resistance of the rotating blade and widen the contact area with the grass so that the grass is cut and the load due to the rotation of the blade is minimized to operate the mower for a long time. It is possible to make this possible and to prevent the grass from being wound around the rotating shaft that fixes the blade as the grass is cut.

There is also utility model registration No. 20-0237356 (June 27, 2001) [rotary blade for lawn mower],

This registration design is effective in making it easy and effective to cut weeds and weeds when mowing using a mower, and economical and mowing work that allows repeated use several times while changing the position of the cutting blade assembled on the rotary plate. Provided is a rotary blade for a mower that satisfies the conditions such as safety to prevent safety accidents caused by damage to the cutting blade even when an impact is applied to the cutting blade.

By constructing a curved concave part on the rotating plate constituting the rotary blade, weeds or brushes are guided and cut by the cutting blade during mowing, so that the mowing operation is performed smoothly, and the position of the blade is changed and repeated several times. By making it usable, it is economical and has effects such as being able to prevent a safety accident that occurs when the blade is damaged even by impact.

Furthermore, there is Patent Registration No. 10-1864945 (May 30, 2018) [Mower blade with guide blade],

This patent is a folding type mower blade constructed by combining a number of cutting blades to a rotating disc configured to rotate by receiving power from the end of the work table of the mower. It relates to a mower blade equipped with a guide blade to protect the cutting blade as well as to prevent safety accidents by configuring the extruding guide blade,

Foreign matter between the cutting blade and the cutting blade configured to rotate on the circumferential surface of the rotating disc of the folding-type lawn mower blade constructed by combining a plurality of cutting blades to fold and rotate the rotating disc configured to rotate by receiving power from the end of the working table of the mower By composing the guide blade that pushes the blade out with a material lighter than the cutting blade, the guide blade hits the small foreign material such as gravel before the cutting blade and pushes it out. , while protecting the cutting blade, the guide blade, which has a weaker centrifugal force, is pushed into the vegetation with a lighter weight than the cutting blade during mowing, allowing the cutting blade to perform its original function of cutting the vegetation.

In addition, there is a patent registration No. 10-1998830 (July 04, 2019) [a mower blade that can be used on both sides],

This patent has a new structure of a mower blade that significantly extends the life of the blade compared to the prior art because it can be used on both sides of the mower blade, and exhibits excellent cutting power during the extended life. It has a special blade structure that can continuously maintain a cutting force above a certain level for an extended life even when used on both sides, making it possible to use the mower economically and efficiently for a long time.

However, when the blades of the existing mowers, including those in the prior art, are mounted on a regular mower, it is difficult to even cut thick and strong crops such as cornstalks. It still has this difficult problem.

Accordingly, in the present invention, the cutter coupled to the first coupling surface of the end of the connector coupled to the mower has a circular body, so the blade exposure range of the cutter is large and the curved cut portion is provided, so that it is thick and strong like a dry cornstalk after harvest, even moisture. An object of the present invention is to provide a lawnmower blade for cutting crops that can cut even crops that are not present.

Another object of the present invention is to provide a lawnmower blade for cutting crops, in which the body diameter of the cutter is larger than the width of the first coupling surface of the connector, so that an effective blade as wide as possible can be secured.

Furthermore, an object of the present invention is to provide a lawnmower blade for cutting crops that is suitable for cutting even crops because the effective cutting angle of the body is about 200 to 340˚ and allows the vine to cut directly without being wound on the blade.

In addition, the present invention has a plurality of fastening holes formed on the second coupling surface of the body, and is configured to be coupled after changing the position of the blade by rotating the body. An object of the present invention is to provide a lawnmower blade for cutting crops that can be displaced to be arranged so that continuous operation is possible.

In order to achieve the above object, the mower blade for cutting crops according to the present invention is

A connector having a central shaft hole for coupling a lawnmower and a plurality of end first coupling surfaces each arranged at a symmetrical position; and

a plurality of cutters having a circular body having a second coupling surface coupled to the first coupling surface of the connector, and blades formed on an outer periphery of the body;

is made including

In addition, in the lawn mower blade for cutting crops according to the present invention

The body diameter of the cutter is greater than the width of the first coupling surface of the connector,

The effective cutting angle of the body coupled to the first coupling surface of the connector is 200 to 340˚,

It is preferable that a plurality of fastening holes are formed in the second coupling surface of the body, and configured to be coupled after changing the position of the blade by rotating the body.

The lawn mower blade for cutting crops according to the present invention has a circular body in which the cutter coupled to the first coupling surface of the end of the connector coupled to the lawn mower has a large exposure range of the cutter blade and provides a curved cut portion, such as dry cornstalks after harvest It can cut thick, tough and even moisture-free crops, and the body diameter of the cutter is larger than the width of the first mating surface of the connector, so it is possible to secure as wide an effective blade as possible. Furthermore, the effective cutting angle of the body is 200 to 340˚ It is suitable for cutting even crops, and vines can be cut directly without being wound on the blade. In addition, a plurality of fastening holes are formed on the second coupling surface of the body, so that the position of the blade is changed by rotating the body. Since it is configured to be combined after use, the blade of the cutter, which has become dull according to use, can be displaced so that the sharp blade is arranged in the cutting position, so that continuous work is possible.

1 and 2 are views of a lawnmower blade for cutting crops according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention is intended to be described in detail in the text of the embodiment (態樣, aspect) (or embodiments) can be applied to various changes and can have various forms. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, particularly the tens digit and the one digit, or the tens digit, the one digit, and the same alphabetic reference numerals indicate members having the same or similar functions, and, unless otherwise stated, each The member indicated by the reference sign may be understood as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick) or small (or thin) in size or thickness in consideration of convenience of understanding, or simplified, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In the present specification, if it is determined that detailed descriptions of well-known functions and configurations may unnecessarily obscure the gist of the present invention, the description thereof may be omitted.

~1~, ~2~, etc. described in the present specification are only to be referred to to distinguish different components, etc., and are not limited by superiority or inferiority or order of manufacture, and in the detailed description and claims of the invention, The names may not match.

When specifying an approximate direction standard that is not strict for convenience in describing the lawn mower blade (A) for cutting crops according to the present invention with reference to FIG. 2 ,

The side where the spaced ball 40 is arranged is set to the lower side, and the opposite side is set to the upper side,

In the illustrated state, the left and right are divided from the viewpoint of the observer,

In the detailed description and claims of the invention related to other drawings, unless otherwise specified, directions are specified and described according to this standard.

First, a perspective view of Fig. 1 [A] omitting the fastening means, a perspective view with a fastening means of [B], a modified example of [C],

And as shown in the perspective view of the mounting of the spaced ball 40 of Fig. 2 [A], the perspective view provided with the fastening means of [B], and the use state diagram of [C],

A lawnmower blade (A) for cutting crops according to the present invention is a connector 10 having a central shaft hole 13 and a plurality of end first engagement surfaces 11 arranged in symmetrical positions, respectively, for coupling a lawnmower;

A circular body 21 having a second engagement surface 21A coupled to the first engagement surface of the connector, and a plurality of cutters 20 having blades 23 formed on the outer periphery of the body do.

As shown in Fig. 1 [A] and the two dot-and-dash circles on the lower right side, respectively, the connector is approximately straight (10), triangular star-shaped (10M) for triangular arrangement, and ten (十)-shaped (10m) for rectangular arrangement I have the structure of the back,

A cutter 20 is engaged for each end of the branch of the connector, that is, for each first engaging surface 11 of a plurality of ends arranged at respective symmetrical positions.

In addition, the blade formed on the outer periphery of the circular body 21 of the cutter 20 is a simple circular blade 23 formed on the entire outer periphery of the circular body, or a sawtooth as in a modified example in the lower left dot-dash circle in FIG. 1 [A] It can be a day (23m).

Further, as shown in the lower right dot-and-dash circle of FIG. 2 [A], the diameter of the body 21 of the cutter 20 is larger than the width of the first coupling surface 11 of the connector 10, so that it is effective as wide as possible. It is preferable to be configured so as to secure the blade.

In particular, the effective cutting angle θ of the cutter body 20, that is, the blade 23, coupled to the first coupling surface 11 of the connector 10 is 200 to 340˚, preferably 230 to 340˚, More preferably, it is 270 to 340

It is suitable for cutting even thick and tough crops such as cornstalks after harvest, and so that vines or waste cords can be cut directly without being wound on the blade.

It is preferable that the effective blade exposed without being covered by the end first coupling surface 11 of the connector 10 is secured as wide as possible to secure a wide effective cutting angle.

The effective cutting angle θ of the cutter body 20 in the range of 200 to 340°, that is, the blades 23 and 23m, exposed without being covered by the end first coupling surface 11 of the connector 10 is the type of mower. It corresponds to the angle range considered up to the case of a model that can select forward and reverse rotation according to

In addition, in the lawn mower blade (A) for cutting crops according to the present invention, a plurality of fastening holes are formed in the second coupling surface 21A of the body 21, and the body 21 is rotated to rotate the blade 23 (23m). ) is configured to be combined after changing the position of

Depending on the use, the blade of the cutter, which has become dull, can be displaced so that the sharp blade is arranged in the cutting position.

Without changing the cutter or setting the blade, it is easily rotated and displaced on the spot, and the sharp blade is utilized for cutting, enabling continuous operation.

For the rotational displacement of the body 21 of the cutter 20, the fastening means 30 for binding the first and second coupling surfaces 11 and 21A is loosened, and the fastening means is filled again after the body is rotated.

This fastening means has a fastening hole in each of the first and second engaging surfaces 11 and 21A, specifically, two non-circular fastening holes, in particular square fastening holes 11h and 21h, which are arranged correspondingly on a straight line, Two bolts 31 and a nut 33 coupled to this square fastening hole are fastened. That is, two fastening holes arranged in a straight line are formed on each of the first engaging surfaces 11, and a central fastening hole and a central fastening hole are formed in the second engaging surface 21A of the body in a cross direction with respect to the central fastening hole. Four outer fastening holes are provided, and the two bolts 31 and nuts 33, which are fastening means, are fastened to the fastening holes 11h and 21h arranged in a straight line of the first and second coupling surfaces 11 and 21A. Tighten and fix, and when changing the position of the dull blade 23, rotate the body 21 to change the position of the outer fastening hole around the central fastening hole, then tighten the bolts and nuts to fix it so that the sharp blade side is suitable for cutting. It is possible to make use of it.

In particular, as shown in the dot-dash circle in the lower right of FIG. 1 [B], the bolt 31 is a head 31A having a tool coupling part such as a cross groove or a hexagon wrench groove and a nut 33 fastening screw part 31C. A non-circular portion (31B) corresponding to the non-circular fastening hole is provided therebetween,

Specifically, the non-circular portion 31B having a rectangular cross-section is coupled to the non-circular fastening holes formed in the first and second engaging surfaces 11 and 21A, that is, the square fastening holes 11h and 21h to use the head 31A as a tool. It is possible to loosen and tighten only the nut 33 using a tool without fixing it.

The square fastening hole and the square non-circular part have various polygonal structures, D-cut, U-cut structures, etc. to implement the idling prevention function,

The nut may be replaced with a butterfly nut or the like to enable loosening and tightening without tools.

The second coupling surface 21A of the cutter 20 body 21 has a central fastening hole, in particular a plurality of outer fastening holes in a radial direction with respect to the square central fastening hole, in particular four outer fastening holes in a cross direction, particularly a square fastening hole. this is provided

If necessary, the fastening means coupled to the outer square fastening hole is completely loosened to separate the bolt 31 and the nut 33,

The bolt 31 and the nut 33 of the central square fastening hole can be configured so that a new sharp blade is utilized for cutting crops by rotating the body 21 with the central bolt as an axis in a slightly loosened state by 90°.

The shape and arrangement angle and number of the second coupling surface 21A of the cutter 20 body 21 can be modified as needed to configure a suitable degree of rotation of the body.

In order to prevent the cutter coupled to the connector from swinging and loosening, the fastening means 30 composed of a pair of bolts 31 and nuts 33 and angles formed on the first and second coupling surfaces 11 and 21A corresponding thereto The arrangement position and number of the fastening hole pairs may also be modified and selected as needed.

On the other hand, as shown in Fig. 1 [C], this fastening means can be configured to form a deformable fastening means 30m to enable rapid rotational displacement of the body 21 and the blades 23 and 23m.

Specifically, this deformable fastening means 30m includes a fastening bolt 31m and a nut 33m coupled only to the connector 10 (that is, a fastening bolt and nut coupled only to the inner fastening hole of the connector), the connector 10 and a fixing pin 37 for fastening the cutter 20, and a wire 35 connecting the tightening bolt and the fixing pin.

Two fastening holes arranged in a straight line are formed on each of the first mating surfaces of the connector, and a central fastening hole is provided on the second mating surface of the cutter body,
In the state in which the fixing pin is coupled to each of the outer and central fastening holes corresponding to the first and second coupling surfaces
When tightening the tightening bolt 31m, the wire 35 is wound around the tightening bolt and pulls the fixing pin 37, and as the wedge groove 31w between the upper and lower heads of the fixing pin is tilted, the upper head presses the upper surface of the connector, and the lower The head presses the lower surface of the cutter body 21 so that the cutter is restrained and fixed by the wedge groove 31w.

The tightening bolt (31m) can be configured by adopting a tightening dial and a wire applied to a tightening wire set in place of a shoelace, which is applied to normal hiking boots and the like.

The number and arrangement position of the tightening bolts and fixing pins can be variously modified. As an additional modification, two tightening bolts are arranged before and after the central shaft hole 13 of the connector 10, and also on the second coupling surface of each cutter. Two fixing pins are arranged before and after,

In the two cutters provided on both sides of the first coupling surface, both fixing pins arranged in a straight line may be configured to be tightened and loosened at once by the same straight tightening bolts.

Next, as shown in FIG. 2, in particular, FIG. 2 [C], a spaced ball, specifically a hemispherical spaced ball 40, is coupled to the lower portion of the central shaft hole 13 of the connector 10 and cut at a predetermined distance from the ground. to be able to do the work,

When adjusting the angle of the blade (A) to avoid obstacles such as the ground or stones, it can be configured to easily and safely adjust the angle along the curved surface of the bottom surface of the spaced ball.

That is, the hemispherical spaced ball 40 is mounted on the lower part of the blade (A), so that the spaced ball first touches the ground during mowing, which helps to select the cutting angle of the cutter's blade, It is possible to mowing with a ball attached to it, so it consumes less stamina.

Furthermore, when mowing, the mowing cutter hits the ground or obstacles instead of touching the spacer ball first, so you can mowing safely.

The mower blade for cutting 'crop' according to the present invention is only to emphasize that it has enough functionality to cut even thick and tough crops, and even when the technology of the present invention is applied to a simple grass cutting cutter, the present invention It should be construed as belonging to the scope of protection.

On the other hand, the inventor of the present invention has developed a blade for a mower that can easily remove weeds and remove after harvesting crops while doing pesticide-free farming for many years as a registered agricultural business operator,

The lawn mower blade (A) for cutting crops according to the present invention is easy even when cutting dry and tough crops after harvest, such as cornstalks, red pepper stems, and legumes. The result was confirmed.

This is because even if the blade formed on the outer periphery of the circular body of the cutter fails to cut the dry cornstalk (a representative example of the thickest, toughest, and most moisture-free crop) at one time, the leading cutting blade passes without jamming after some cutting, and then the trailing blade again This is because the cutting operation is repeatedly performed without a delay as it passes through the part of the cut once more without any jamming, so that the continuous cutting operation is performed quickly without stopping the jamming, making it possible to cut.

In addition, the cutter, body, and blade of the mower blade (A) for cutting crops according to the present invention are made of a circular shape as a whole, so that there is little cutting load during weed removal and there is no tangle of vines between the mowing blade and the mower boom when mowing vines. Confirmed.

Since the body and the blade of the lawn mower blade (A) for cutting crops according to the present invention are circular 360 degrees, the worn part during the mowing operation is about 60 degrees, replacing the dull part and rotating so that the sharp blade is arranged in the cutting position Since it can be fixed and used, it was confirmed that it can be used many times and for a long time with one blade, that is, a circular cutter.

When the round cutter is completely dull, it can be replaced with a new blade or a new cutter, or the blade of each cutter blade can be rebuilt and used.

In addition, as shown in Fig. 1 [A], the cutter of this mower blade can be manufactured in various shapes and numbers, such as a 2-blade cutter, 3-blade cutter, and 4-blade cutter, and can be cut under a small load, and the blade of the cutter is A sawtooth shape may be used.

Commonly known techniques related to the specifications of the mower, the blade, etc. mounted in the above description are omitted, but those skilled in the art can easily guess, infer and reproduce it.

In addition, in the above description of the present invention, with reference to the accompanying drawings, a blade having a specific shape and structure has been mainly described, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, and these modifications, changes and substitutions are It should be construed as belonging to the protection scope of the invention.

A: Blade 10: Connector
11: first coupling surface 20: cutter
21: body 21A: second coupling surface
23: blade 30: fastening means
40: space ball

Claims (2)

A connector having a central shaft hole for coupling a lawnmower and a plurality of end first coupling surfaces each arranged at a symmetrical position; and
A circular body having a second coupling surface coupled to the first coupling surface of the connector, and a plurality of cutters having blades formed on the entire outer periphery of the body;
The body diameter of the cutter is larger than the width of the first coupling surface of the connector,
The effective cutting angle of the body coupled to the first coupling surface of the connector is 200 to 340˚,
The blade formed on the entire outer periphery of the circular body of the cutter is a circular blade,
configured to cut coarse, brittle, even moisture-free crops such as post-harvest dry cornstalks;
Loosen the fastening means for binding the first and second coupling surfaces for rotational displacement of the cutter body, and fill the fastening means again after rotating the body,
Two inner and outer fastening holes arranged in a straight line are formed on each of the first mating surfaces of the connector,
The second coupling surface of the cutter body has a central fastening hole,
The fastening means is composed of a fastening bolt and nut coupled only to the inner fastening hole of the connector, a fixing pin for fastening the connector and the cutter, and a wire connecting the tightening bolt and the fixing pin,
The fixing pins are coupled to the respective outer and central fastening holes that coincide with the first and second coupling surfaces, and when the tightening bolt is tightened, the wire is wound around the tightening bolt to pull the fixing pin, and the wedge groove between the upper and lower heads of the fixing pin is inclined. While the upper head presses the upper surface of the connector, and the lower head presses the lower surface of the cutter body, the cutter is restrained and fixed by the wedge groove. Two fixing pins are arranged on the front and back sides of the 2 coupling surface, so that both fixing pins arranged in a straight line on the left and right in the two cutters provided on the first coupling surface on both sides can be tightened and loosened at once by the same straight tightening bolt. there is,
A hemispherical spaced ball is coupled to the lower portion of the central shaft hole of the connector, and the mower blade, characterized in that it is configured to perform cutting at a predetermined distance from the ground. The method of claim 1,
An effective cutting angle of the body coupled to the first coupling surface of the connector is 230 to 340˚.

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