KR102286900B1 - Bush cutting machine - Google Patents

Abstract

The present invention relates to a lawn mower, and more particularly, a housing, a cutting unit, and a suction unit are provided, and the body of the blade is concave with respect to the rotational direction so as to collect the cut weeds, so that the cut weeds can be collected. A plurality of through holes are formed to reduce air resistance generated during rotation, and an extension plate extending a predetermined length in the rotational direction of the body of the blade is further provided to block the scattered stones.

Description

Brush cutting machine

The present invention relates to a lawnmower, and more particularly, to a lawnmower that is provided with a housing, a cutting unit and a suction unit, and the body of the blade is concave with respect to the rotational direction of the blade member to collect the cut weeds.

A mower is a tool for cutting by rotating a blade using a small engine, and is called a mower, a mower, and a mower.

In general, the lawn mower is installed with a flexible shaft connected to the power transmission side of the engine, and a pipe-type working rod having a rotating shaft installed therein is installed at the end of the flexible shaft. a cutter blade is installed, and the rotation of the cutter blade cuts tree branches, grass, weeds, and the like.

The cutter blade occupies a very important configuration in determining the performance of the lawnmower, and the cutter blade of the conventional lawnmower is symmetrical and formed to rotate at high speed.

However, ordinary cutter blades carry a considerable weight due to their weight, which causes inconvenience when using the lawnmower, and the rotary blade feels as if it is stuck to the ground, so the felt weight felt by the lawnmower is quite large.

In addition, the effect of cutting weeds is reduced as much as the slow speed in the rotational speed, and the cut weeds or two scatter in all directions to injure the user, or the impact applied to the rotating blade from plants is increased, so that the rotating blade is damaged and the useful life is shortened. shortened or there is a problem.

As described above, the following techniques have been proposed to solve the above problems.

The proposed technology is a portable lawn mower rotary blade (Korea Utility Model Publication No. 20-0448876), and the prior art is an equidistant centering on a hole for mounting a lawnmower, and holes for generating vortex of the same diameter are perforated, and 2 to 6 vortexes are perforated. A hole for generating a vortex is formed, and the hole for generating a vortex is made of a diameter of 15 to 25 mm, and the diameter decreases in the order of the hole for generating a vortex at a distance from the hole for generating a vortex at a distance in the hole for mounting the mower. The vortex generating hole is perforated to reduce the weight by itself, and the rotating blade is slightly lifted due to the vortex generated in the vortex generating hole, so the actual weight of the portable mower that the operator actually feels is reduced. , it has the effect of buffering the impact applied to the rotating blade from the beolcho target.

However, the prior art is different from the present invention in a specific configuration, and the effect of reducing the sensible weight due to the vortex is slightly buoyant, and it is difficult to increase the rotation speed of the rotary blade of the mower.

In addition, there is still a problem in that the cut weeds or two are scattered in all directions while the user is working, thereby injuring the user.

Korean Utility Model Publication No. 20-0448876 Portable: Rotating blade of lawn mower

The technical problem to be achieved by the present invention is to provide a lawnmower in which the body of the blade is concavely formed with respect to the rotational direction so as to collect the cut weeds.

Another technical problem to be achieved by the present invention is to provide a lawnmower in which a plurality of through holes are formed in a body portion of a blade.

Another technical object to be achieved by the present invention is to provide a lawn mower further comprising an extension plate extending a predetermined length in the rotational direction of the blade.

A lawnmower according to an embodiment of the present invention for achieving the above object includes a housing formed with a suction port, a blade member rotatably installed below the suction port and provided with a plurality of blades to weed weeds, and the blade member and a cutting unit including a driving member for rotating the cutting unit, and a suction unit installed in the housing to suck weeds weeded by the cutting unit through the suction port, wherein the blade includes a body and a body. Provided at the lower end and provided with a blade for cutting weeds by rotation, the body portion is formed concavely with respect to the rotational direction of the blade member so as to collect the weeds cut by the blade.

The suction unit has a suction passage through which the weeded weeds move therein is formed, a suction pipe connected to the housing so that the suction passage is interlocked with the suction port, and a suction pipe installed in the suction pipe so that the weeds weeded by the suction passage can be sucked It includes a suction member that provides a suction force so as to

In the suction pipe, a power line connected to a power supply for supplying electricity to the driving member passes through and a wire passage is formed therein so that it can be connected to the driving member.

The suction pipe further includes a grip portion to be gripped by a user.

a suction switch provided to operate the suction member;

and a rotary switch provided to operate the driving member.

The suction pipe and the grip portion are screwed to each other so that separation and coupling are possible.

The blade is formed with a plurality of through holes through which air can pass in order to reduce air resistance generated during rotation.

The body portion is formed of synthetic resin to reduce weight, and the blade portion is formed of a metallic material.

The blade further includes an extension plate extending a predetermined length in the rotational direction of the body portion so as to block the stones scattered toward the operator during the weeding operation.

The lawnmower according to the present invention has the following effects.

(1) It has the advantage of collecting the weeds to be cut formed so that the body of the blade is concave with respect to the rotational direction so as to collect the cut weeds.

(2) A plurality of through holes are formed in the body of the blade to reduce air resistance generated during rotation.

(3) It has the advantage of being able to block the scattered stones by further providing an extension plate extending a predetermined length in the rotational direction of the blade.

1 is a perspective view showing a lawnmower according to a preferred embodiment of the present invention.
2 is a perspective view showing a cutting part according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a suction pipe connected to a housing according to an exemplary embodiment of the present invention.
Figure 4 is a side view showing the side of the blade according to a preferred embodiment of the present invention.
5 is an enlarged view showing the shape of the suction pipe and the internal space of the suction pipe.
6 is a perspective view illustrating a plurality of through holes formed in the blade and an extension plate in which the blade extends a predetermined length in the rotational direction of the body according to an exemplary embodiment of the present invention.
7 is a cross-sectional view showing a form in which the injection unit is installed according to an embodiment of the present invention.

Hereinafter, a "mower" according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. 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.

The terms used in the present application are only used to describe specific embodiments, and are 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 “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, 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

1 is a perspective view showing a mower according to a preferred embodiment of the present invention, Figure 2 is a perspective view showing a cutting part according to a preferred embodiment of the present invention, Figure 3 is a housing according to a preferred embodiment of the present invention It is a cross-sectional view showing a connected suction pipe, FIG. 4 is a side view showing the side of the blade according to a preferred embodiment of the present invention, FIG. 5 is an enlarged view showing the shape of the internal space of the suction pipe and the suction pipe, and FIG. A perspective view showing an extension plate in which a plurality of through holes formed in the blade according to a preferred embodiment and the blade extend a predetermined length in the rotational direction of the body portion, FIG. am. The present invention will be described in detail with reference to FIGS. 1 to 7 below.

1 to 3, a lawnmower 10 according to the present invention is shown.

The mower 10 includes a housing 100 , a cutting unit 200 , a suction unit 300 , and a grip unit 330 .

The housing 100 is formed in a disk shape, a receiving space 101 is provided on an upper side of the housing 100, and a suction port 110 is formed on the upper surface.

The cutting unit 200 is installed in the housing 100 and includes a driving member 210 and a blade member 220 .

The driving member 210 is installed in the receiving space 101 of the housing 100 .

The driving member 210 refers to a motor and is mainly used for home use, and a DC motor with low noise and power consumption and fine speed control is preferable.

The driving member 210 may include a synthetic resin as an outer circumferential material, and the synthetic resin uses carbon fiber reinforced plastic (CFRP). The CFRP is light and durable, so it is suitable for the use of the material of the outer circumferential surface of the driving member 210 .

The driving member 210 is installed through the housing 100 so that the driving shaft 212 can protrude to the lower portion of the housing 100 .

The blade member 220 is installed at the lower end of the drive shaft 212 of the housing 100, the drive shaft 212 of the drive member 210 is at the lower end of the suction port 110, the blade member 220 and It is fixed, and a plurality of blades 223 are provided on the outer circumferential surface.

The blade 223 extends in a direction away from the center of rotation of the blade member 220 , and includes a body portion 222 and a blade portion 224 .

The body portion 222 is formed to be concave with respect to the rotational direction of the blade member 200 so that weeds cut by the blade portion 224 may be collected in front of the body portion 100 . In addition, the body part 100 is prevented from scattering weeds in all directions when weeding because some of the weeds are collected.

The body portion 222 may be formed of synthetic resin, preferably CFRP (carbon fiber reinforced plastic).

4, the blade part 224 is sharply formed at the lower end of the body part 200, and the blade member 220 rotates with the rotation of the drive shaft 212 to cut weeds and weeds. there is.

The blade portion 224 is provided with a metallic material.

The suction unit 300 includes a suction pipe 310 and a suction member 320 .

The suction pipe 310 is formed in a pipe shape provided with an internal space.

The suction pipe 310 is installed in the housing 100 so that one end communicates with the suction port 110 . In this case, the suction pipe 310 is located on the upper side of the housing 100 , and is preferably installed at an angle with respect to the upper surface of the housing 100 .

Referring to FIG. 5 , the suction pipe 310 has a partition wall installed therein to distinguish the internal space into a wire passage 314 through which electric wires pass and a suction passage 312 through which weeds pass. The partition wall also extends along the longitudinal direction of the suction pipe 310 .

The suction pipe 310 is a conduit ( 316) is installed.

The conduit 316 is preferably installed on the outer peripheral surface of one end of the suction pipe 310 .

The suction passage 312 has an outlet 313 formed on the outer peripheral surface of the other end, so that the sucked weeds can be discharged to the outside.

The suction member 320 is provided with a suction pipe 310 on one side. It is installed on the suction passage 312 of the suction pipe 310 to provide suction power so that weeds are sucked through the suction port 110 and passed through the suction passage 312 .

The suction member 320 is generally used in the prior art in order to generate a suction force, and a detailed description thereof will be omitted.

The suction member 320 is connected to a power line connected to the power supply.

The suction member 320 supplies electric power by the power supply and rotates the suction member 320 so that the cut weeds pass through the suction port 110 and the suction pipe 310 to suck the weeds.

The suction pipe 310 has a screw thread formed on the outer peripheral surface of the other end so that it can be screwed with the grip part 330 .

The grip unit 330 includes a main body connected to the suction pipe 310 and a handle installed on the main body and gripped by an operator.

The main body is formed with a coupling hole so that the other end of the suction pipe 310 can be coupled to one end. The coupler has a screw thread formed on the inner circumferential surface so that the suction pipe 310 can be screwed to the body.

The handle is installed on the upper part of the body, a suction switch is provided to operate the suction member 320 , and a rotary switch is provided to operate the driving member 220 .

The handle is connected with a hose and is connected to the mower device.

The mower device unit includes a shoulder unit to be worn over the shoulder, a power unit to supply power to a housing, a cutting unit, a suction unit, and the like, and a connection hose unit connected to the handle.

As described above, in the lawnmower 10 of the present invention, when the user operates the rotary switch, power is supplied to the driving member 220 .

When the driving member 210 is rotated by the supplied power, the blade member 220 coupled to the driving member 210 rotates at the same time to cut weeds by the blade part 224 of the blade 223 to weed. is made, and at the same time, the body portion 222 of the blade member 200 is concavely formed with respect to the rotational direction to collect and collect the cut weeds.

In addition, when the user operates the suction switch while cutting the weeds, the suction member 320 operates to pass the cut weeds through the suction port 110 formed in the housing 100 through the suction passage 312, and the It is discharged to the outside through the outlet 313 installed on one side of the suction passage (312).

Meanwhile, referring to FIG. 6 , a blade 223 according to another embodiment of the present invention is illustrated.

Elements having the same function as in the drawings shown above are denoted by the same reference numerals.

Referring to the drawings, the blade 223 is formed with a plurality of through holes 225 to allow air to pass through when the blade member 220 rotates. When the blade 223 is rotated by the rotation of the drive shaft 212, air passes through the plurality of through-holes 225 to reduce air resistance, and the rotation speed is increased, so that the blade part ( 224) increases the number of cuttings to facilitate weeding.

In addition, the blade 223 is further provided with an extension plate 228 extending a predetermined length in the rotational direction of the body portion 222 .

The extension plate 228 is installed on the upper end of the body portion 222 and extends in the longitudinal direction of the body portion 222 .

The grass field in which the weeding operation is carried out has a high risk of scattering to the worker side because soil or stones are mixed, and thus there is a risk of serious injury. However, when the extension plate is provided (228), the soil or stones scattered during rotation collide with the extension plate 228 and fall down again, so that it is prevented from scattering toward the operator, thereby preventing injury.

Meanwhile, FIG. 7 shows a lawnmower 10 according to another embodiment of the present invention.

Referring to the drawings, the mower 10 further includes a spraying unit capable of spraying high-pressure air to the blade 223 .

The injection unit includes an air supply unit for supplying high-pressure air to the air nozzle 215 .

The air nozzle 215 is installed on the upper surface of the housing 100 opposite to the blade 223, and sprays high-pressure air downward.

Although not shown in the drawing, the air supply unit includes a supply pipe connected to the air nozzle 215 and a compressor installed in the supply pipe to supply high-pressure air to the air nozzle 215 .

Therefore, when the blade member 220 is rotated by the rotation of the drive shaft 212, the air supply unit supplies air to the air nozzle 215 through a supply pipe connected to the air nozzle 215, and the air nozzle 215 is When air is sprayed on the blade 223, the air moves along the concave surface of the body 222 of the blade 223, and the weeds collected on the concave surface are scattered to the suction port 110 ) to be moved to

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

10: mower 100: housing
110: intake 101: storage space
200: cutting unit 210: driving member
212: drive shaft 215: air nozzle
220: blade member 222: body portion
223: blade 224: blade part
225: through hole 228: extension plate
300: suction unit 310: suction pipe
312: suction passage 314: electric wire passage
313: outlet 316: conduit
320: suction member 330: grip portion

Claims (9)

a housing having a suction port;
a cutting unit including a blade member rotatably installed under the suction port and provided with a plurality of blades to weed weeds, and a driving member for rotating the blade member;
a suction unit installed in the housing to suck the weeds weeded by the cutting unit through the suction port;
and a spraying part capable of spraying high-pressure air to the blade,
the spraying part
an air nozzle installed on the inner wall surface of the housing, installed on the inner wall surface of the housing above the blade, and spraying high-pressure air in a direction crossing the rotation direction of air generated by the rotation of the blade;
An air supply unit for supplying high-pressure air to the air nozzle,
The blade has a body portion and a blade portion provided at the lower end of the body portion for cutting weeds by rotation, and the body portion is concave with respect to the rotational direction of the blade member so as to collect the weeds cut by the blade. characterized in that
early period. The method of claim 1,
The suction unit includes a suction pipe connected to the housing so that a suction passage through which the weeded weeds are moved is formed therein, and the suction passage is interlocked with the suction port;
It is installed in the suction pipe, characterized in that it comprises a suction member that provides a suction power so that the weeds can be sucked into the suction passage.
early period. 3. The method of claim 2,
The suction pipe is characterized in that a wire passage is formed therein so that a power line connected to a power supply unit passes through to supply electricity to the driving member to be connected to the driving member.
early period. 3. The method of claim 2,
The suction pipe, characterized in that it further comprises a grip portion to be gripped by a user
early period. 5. The method of claim 4,
a suction switch provided to operate the suction member;
and a rotary switch provided to operate the driving member.
early period. 6. The method of claim 5,
The suction pipe and the grip part are characterized in that they are screwed to each other so that they can be separated and coupled.
early period. The method of claim 1,
The blade is characterized in that a plurality of through-holes are formed so that air can pass through in order to reduce air resistance generated during rotation.
the forerunner to do. The method of claim 1,
The body portion is formed of synthetic resin to reduce weight, and the blade portion is formed of a metallic material.
early period. The method of claim 1,
The blade further comprises an extension plate extending a predetermined length in the rotational direction of the body portion so as to block the stones scattered toward the operator during the weeding operation.
early period.

Images