KR200334759Y1 - A Cutter Knife For A Weeder - Google Patents

Abstract

The present invention relates to a cutter blade for mowing grass that can remove more weeds or scrubs with relatively less power than conventional cutter blades. And a first blade and a second blade which are formed to be tapered so as to be formed. The tip portion of each wing is inclined to be inclined in one direction, respectively.

Description

Cutter blades for mowers {A Cutter Knife For A Weeder}

The present invention relates to a cutter blade having a structure that can be removed more efficiently when removing the various weeds, grass and scrubs, more specifically, by forming an inclined portion inclined in one direction to the front end of each blade of the cutter blade The present invention relates to a cutter blade for mowing, which can remove weeds or scrubs more efficiently with less power than conventional cutter blades.

In general, the mower is a device for weeding grass around oxygen, grass, etc. in a wide area such as a park or a forest ranch, and for this purpose, instead of using a sickle, a cutter blade that rotates is used to cut the grass with steel rotating power. It consists of a small internal combustion engine.

Conventional mower cutter blade configured as described above has a problem that the grass is not removed well with a small rotational force when removing weeds or grass while rotating in a rectangular "bar" shape. This is caused by the repetition of a phenomenon in which the blades or weeds bounce off the tip of the cutter blade when the cutter blade is not rotated.

Therefore, the conventional cutter blade having such a structure requires a stronger rotational force when removing weeds and the like. This factor has the disadvantage of causing other problems such as waste of fuel, noise and breakage of the cutter blade due to the strong torque.

Hereinafter will be described together with the accompanying drawings for the conventional cutter blade mentioned.

1 is a plan view of a conventional cutter blade. As shown in Figure 1, the conventional cutter blade is composed of a cutter blade of a rectangular shape.

The cutter blade 9 is divided into a first blade 3 and a second blade 5 around the coupling hole 1 formed in the center. At this time, a blade portion 7 for removing weeds and the like is formed on one side portion of each blade 3 and 5. Here, each blade portion 7 is formed in the longitudinal direction of each blade (3, 5).

The cutter blade 9 thus formed is alternately removed by the blade portions 7 of the blades 3 and 5, which are rotated by the power of the internal combustion engine provided in the lawn mower. Near the edge of the rotation radius of each wing first contact the weeds, there was a problem that the weeds, etc. are not easily removed. This is caused by the phenomenon that blades 7 are not formed at the tip portions of the respective blades 3 and 5, and the grass, the weeds, and the like bounce off.

Therefore, in order to remove the weeds, etc. requires a faster rotational force of the cutter blade (9), which implies the risk that the cutter blade (9) hits the stone is broken or the person in the periphery of the stone is injured.

Therefore, the present invention has developed a cutter blade having a structure capable of efficiently removing weeds with a smaller power in view of these problems.

Therefore, the present invention is conceived in view of the above problems, the first object of the present invention is to form an inclined portion inclined in one direction to the tip of each blade of the cutter blade rotated by the steel rotational power of the internal combustion engine or motor conventional It is to provide a cutter blade for mowing the structure that can remove more weeds or trees with less power than the cutter blade.

The second object of the present invention is composed of a first wing and a second wing that is tapered to be narrower in width with respect to the radial direction centering on a circular engaging hole formed in the center, each one end of the blade in one direction It is to provide a cutter blade for a mower comprising an inclined portion formed to be inclined.

The object of the present invention, the first blade and the second blade which is formed tapered so as to narrow the width in the radial direction about a circular coupling hole formed in the center; consisting of the tip portion of each wing in each direction It is achieved by a cutter blade for mowing, characterized in that it comprises an inclined portion formed to be inclined.

And further comprising a third wing, wherein the first, second, and third wings may be symmetrically disposed about the coupling hole, and further include a third wing and a fourth wing, and the first, second, and third wings. 4 wings may be symmetrically disposed about the coupling hole.

In addition, the inclination angle of the inclined portion of each blade with respect to the normal direction of the rotation radius of the cutter blade is preferably 15 ° to 20 °.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a plan view of a conventional cutter blade,

2 is a perspective view of a cutter blade for mowing according to the present invention,

3 is a plan view of the cutter blade for the lawn mower according to FIG.

Figure 4 is a state of use of the cutter blade for mowing according to the present invention,

5 is a conceptual diagram showing the inclination angle of the inclined portion according to FIG.

6 is a plan view of a cutter blade for lawn mowers according to another embodiment.

<Description of the code | symbol about the principal part of drawing>

1: coupling hole, 3: first wing,

5: 2nd wing, 7: blades,

9: cutter blade, 110: coupling hole,

120: first wing, 130: second wing,

140: third wing, 150: fourth wing,

160: blade portion, 170: inclined portion,

1000: cutter blade for mowers, 2000: mowers,

Hereinafter, the cutter blade for mowing according to the present invention will be described in detail together with the accompanying drawings.

Figure 2 is a perspective view of a cutter blade for mowing according to the present invention, Figure 3 is a plan view of the cutter blade for mowing according to Figure 2, Figure 4 is a state diagram of the cutter blade for mowing according to the present invention. As shown in Figs. 2, 3 and 4, the cutter blade 1000 is mounted and used in devices such as the lawn mower 2000 and the lawn mower when removing various weeds, grasses and scrubs.

The cutter blade 1000 includes a first blade 120 and a second blade 130 which are tapered to have a narrow width in a radial direction about a circular coupling hole 110 formed at a center thereof. .

The coupling hole 110 is formed to be connected to the rotary shaft of the lawn mower 2000, and is inserted into the rotary shaft and fixed with a nut so as to prevent the cutter blade 1000, which is co-rotating with the rotation of the rotary shaft, from being separated by centrifugal force.

The blades 160 are individually formed on the tapered portions of the respective blades 120 and 130 so that weeds may be alternately removed during rotation. The blades 160 are formed at the center of the coupling hole 110. Are located diagonally to each other.

And the inclined portion 160 is formed to be inclined in one direction at the tip portion of each wing (120, 130), respectively. At this time, the direction of the inclined portion 160 is formed to be inclined in the opposite direction to the rotation direction of each blade (120,130).

This is to prevent the phenomenon that the blades bounce off without removing the blades 160, which are located near the edges of the rotation radius of each blade 120 and 130, because the blades 160 and 130 are not formed at the distal ends of the blades 120 and 130. .

It is preferable that the inclination angle of the inclined portion 170 of each of the blades 120 and 130 with respect to the normal direction of the rotation radius of the cutter blade 1000 is 15 ° to 20 °. This is because when the inclination angle of the inclination portion 160 is 15 ° or less, a relatively large effect is not seen in the removal of weeds and the like located near the edges of the rotation radius of each of the blades 120 and 130.

If the inclination angle of the inclination portion 160 is 20 ° or more, it can be seen that the effect of removing the weeds, etc. located near the edge of the rotation radius of each wing (120,130), but the width of each wing (120,130) is remarkably This is because the wings are easily broken when they are hit by hard cuttings such as rocks.

Hereinafter, the inclination angle of the inclined portion formed on the tip portion of each wing through the conceptual diagram will be described.

5 is a conceptual diagram illustrating an inclination angle of the inclination part according to FIG. 3. As shown in FIG. 5, it is assumed that the point “P” is a side that is tangential by extending a solid line in the direction in which the blade portion 160 is formed at the center of the coupling hole 110 based on the first blade 120. Assume that the vertex of the first blade 120 located on the vertical line of P "is" P1 ", and the line connecting the distance between" P "and P1 with a solid line is assumed to be" L1 ".

First, the end line of "L1" is fixed to "P" and then rotated to find a point "P2" that is tangent to the side where the blade portion 160 is not formed. After that, "P2" and "P1" are extended in a solid line to remove hatched portions to form the inclined portion 160. Accordingly, the inclination angle of the inclined portion 160 may be found to be 15 ° to 20 °.

6 is a plan view of a cutter blade for mowers according to the first embodiment, and FIG. 7 is a plan view of a cutter blade for mowers according to the second embodiment. As shown in FIG. 6, the cutter blade 1000 further includes a third blade 140 that is tapered to have a narrow width in a radial direction about a circular coupling hole 110 formed at the center thereof. The first, second, and third wings 120, 130, and 140 may be configured to be symmetrically disposed about the coupling hole 110.

In addition, as shown in FIG. 7, the cutter blade 1000 has a third blade 140 and a fourth blade 150 which are tapered to be narrow in width in a radial direction about a circular coupling hole 110 formed at the center thereof. ), And the first, second, third, and fourth wings 120, 130, 140, and 150 may be configured to be symmetrically disposed about the coupling hole 110.

At this time, the inclination portion 160 direction of each of the blades 120 and 130 is formed to be inclined in the opposite direction to the rotation direction. The cutter blade 1000 configured as described above basically has a blade portion 160 formed on the rear surface thereof so that the front / rear side can be changed according to the rotational direction. In this case, each blade portion 160 is formed on the side of the long side. .

As described above, the cutter blade 1000 for the lawn mower according to the present invention is mentioned two types of cutter blades including other embodiments, but the cutter blade having three, five, and six blades formed radially is also provided. Can be included.

In addition, the circular cutter blade having a plurality of wings along the circumferential direction can also be used by applying the same structure as the present invention.

As described above, according to the cutter blade for mowing, it is possible to prevent the weeds, grass and other trees bounce off the tip portion, it is possible to remove weeds and the like with a relatively small rotational force.

In addition, it is possible to reduce the noise of the lawn mower due to the reduction of the rotational force, it is characterized by the physical risk is also reduced by preventing the cutter blade breakage due to high rotational power. In addition, relatively small fuel consumption can be used to remove large areas of weeds can be economically effective.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Therefore, the scope of the utility model registration claims attached will include such modifications or variations that fall within the spirit of the present invention.

Claims (4)

In cutter blades for mowers. Consists of the first blade 120 and the second blade 130 is tapered so as to narrow the width in the radial direction around the circular coupling hole 110 formed in the center; Cutting blades for blades, characterized in that comprises a; inclined portion 170 is formed to be inclined in one direction, respectively at the tip portion of each wing (120,130). The cutter blade of claim 1, further comprising a third blade 140, wherein the first, second, and third blades 120, 130, and 140 are symmetrically disposed about the coupling hole 110. . The method of claim 1, further comprising a third wing 140 and the fourth wing 150, the first, second, third, fourth blades (120, 130, 140, 150) are arranged symmetrically around the coupling hole (110) Cutter blades for mowing. The angle of inclination of the inclined portion 170 of each of the blades 120 and 130 with respect to the normal direction of the rotation radius of the cutter blade is characterized in that 15 ° to 20 °. Cutter blades for mowers.