KR20130127337A - Brush cutter safeguard - Google Patents

Brush cutter safeguard Download PDF

Info

Publication number
KR20130127337A
KR20130127337A KR1020120051188A KR20120051188A KR20130127337A KR 20130127337 A KR20130127337 A KR 20130127337A KR 1020120051188 A KR1020120051188 A KR 1020120051188A KR 20120051188 A KR20120051188 A KR 20120051188A KR 20130127337 A KR20130127337 A KR 20130127337A
Authority
KR
South Korea
Prior art keywords
blade
fixing
piece
groove
bearing
Prior art date
Application number
KR1020120051188A
Other languages
Korean (ko)
Inventor
김우영
Original Assignee
김우영
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김우영 filed Critical 김우영
Priority to KR1020120051188A priority Critical patent/KR20130127337A/en
Publication of KR20130127337A publication Critical patent/KR20130127337A/en

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/828—Safety devices
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/20—Devices for protecting men or animals
    • A01D75/206—Devices for protecting men or animals for mowers carried by operator

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

The present invention relates to a cutter protecting device for a brush cutter. The size of cutter shafts of existing brush cutters are formed differently per each manufacturer so that the installation of a cutter protecting plate on the lower side of a cutter of a brush cutter is not facilitated. For solving the problem mentioned above, the purpose of the present invention is to provide the cutter protecting device for a brush cutter which facilitates the installation regardless of size of a cutter shaft; facilitates the replacement of damages components; and has light weight and high durability. For accomplishing the purpose, the present invention includes a cutter protecting plate (20) installed on the lower side of a blade (16) for protecting a cutter (16) which is installed on a worktable (1) and rotated by the power. The cutter protecting plate (20) includes a body (22) with a through-hole (26) on the center; a blade piece (21) which is protruding from the outer periphery of the body (22); blades (24) which are arranged at constant intervals and protruding from the outer periphery of the body except for a portion, on which the blade piece (21) are formed, in order to form a guide groove (27) through which weeds are inserted on the outer periphery of the body. Blades holes (25) of either an arc shape or a polygonal shape are formed on the blades (24).

Description

Brush Cutter Safeguard

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade protection device for lawn mowers, and more particularly, to a blade protection device for lawn mowers, which is easy to install regardless of the size of the blade shaft, easy to replace damaged parts, and light and durable.

Scythes or mowers are used to remove weeds on farmland, mow graves and lawns of golf courses, and recently, mowers have been used to perform weeding operations in a short time.

Such mowers are generally installed at the lower end of the rotary shaft of the workbench with the blades exposed to the outside, so when the road surface of the manufacturing process is uneven, the blades collide with the object such as stones to bend or break the blade. In addition to the damage caused by the blade, there is a problem that the secondary accident occurs such as the user missed the workbench due to the impact generated during the crash or injured by a broken blade or debris during the crash.

Accordingly, in order to cut the weed smoothly while protecting the blade, a lawnmower was provided with a blade protection plate under the blade. However, since each blade maker has a different blade axis size, each blade is formed on the blade axis of the lawn mower. There was a problem that it was not easy to install the protective plate.

Accordingly, an object of the present invention is to provide a blade protection device for lawn mowers, which is easy to install, easy to replace damaged parts, and light and durable to solve the above problems, regardless of the size of the blade shaft.

In order to achieve the above object, the present invention is a blade protection for lawn mowers provided with a blade protection plate 20 installed in the lower blade 16 to protect the blade 16 is rotated by the power installed on the work table (1) In the device, the blade protection plate 20 has a through-hole 26 in the center body 22; A wing piece 21 formed to protrude from the outer circumference of the body 22; And spaced at uniform intervals on the outer circumference of the body 22 except the portion where the wing piece 21 is formed so that the guide groove 27 into which the weed is drawn is formed on the outer circumference of the body 22. Consists of a wing 24 formed to protrude, characterized in that the wing 24 is formed with a wing hole 25 having any shape of arc and polygon.

In the present invention, the blade 24 is characterized in that the left and right sides are formed to have different lengths based on the direction facing the blade protection plate 20 from the worktable (1).

The present invention is a support plate 40 is installed between the blade piece 21 and the work table so that the blade protection plate 20 is supported on the work table (1); And one side is coupled to the blade shaft 12 in which the blade 16 is installed, the other side is seated and fixed in the fixing groove 60 formed on the outer periphery of the through hole 26 to be detachable with the body 22 Is coupled, the one side and the other side further comprises a fastening means 30 is screwed in the direction opposite to the rotation direction of the blade 16, the fixing groove 60 is the through hole 26 in the center The inner groove 62 and the outer circumference of the inner groove 62 is formed of the inner groove 62 and the stepped outer groove 64 to have a height higher than the height of the inner groove 62, In the outer groove 64, the fixing projections 64a protruding toward the inner groove 62 from the outer circumference of the outer groove 64 are formed to be spaced at uniform intervals, and the fixing projections 64a and the fixing projections 64a. In between the fixing holes 64b is characterized in that it is formed.

In the present invention, the fastening means 30, the bearing 36 formed in a hollow; Bearing fixing means (70) for fixing the bearing (36) to the blade protection plate (20) in a state of covering a portion of the upper and lower surfaces of the bearing (36); One side is inserted into the hollow hole 37 formed in the center of the bearing 36, the other side is formed to have a larger diameter than one side to protrude to the upper portion of the bearing 36, the seating groove in the center of the upper surface of the protrusion A first fastening piece 34 having a screw line formed therein, wherein a screw line capable of screwing in a direction opposite to the rotational direction of the blade 16 is formed at any one of the inner and outer circumferences of the protruding portion; And the upper surface is formed flat to be in close contact with the lower surface of the blade 16, in the center is formed an insertion hole 31 is inserted into the blade shaft 12 for providing a rotational force to the blade 16, the outer outer Any one of the peripheral and the inner circumference includes a second fastening piece 32 having a threaded line to be coupled to the protrusion of the first fastening piece 34 in a threaded manner, the bearing fixing means 70 is the bearing It consists of the 1st fixing piece 72 arrange | positioned at the lower surface of the 36, and the 2nd fixing piece 74 arrange | positioned at the upper surface of the said bearing 36, The said 1st fixing piece 72 and the 2nd fixing piece An inner plate 73a and 73b having a protruding hole 77 at the center and an outer plate 75a formed to be stepped with the inner plate 73a and 73b on the outer circumference of the inner plate 73a and 73b, respectively. , 75b), and protruding pieces 75c are formed on the outer circumferences of the outer plates 75a and 75b to be spaced at even intervals. A fastening hole 76 is formed at the center of the piece 75c, and the protruding pieces 75c are seated in the fixing groove 60 so as to be disposed between the fixing protrusions 64a formed in the outer groove 64. It is characterized by.

In the present invention, the wing 24, the horizontal portion (24a) the upper surface is formed flat; A protrusion part 24b integrally formed with the horizontal part 24a and bent upwardly vertically at an end of the horizontal part 24a; And a bent portion 24c formed integrally with the protrusion 24b and bent downward from the end of the protrusion 24b, and the blade protection plate 20 is formed with the first fixing piece 72. When the second fixing piece 74 is fixed to the body 22 by a bolt / nut coupling method, the nut 14 protrudes downward from the blade protection plate 20 to prevent the nut 14 from being damaged. ) Is formed in the shape of a groove recessed toward the upper surface of the blade protection plate 20, the nut 14 is disposed for coupling the first fixing piece 72 and the second fixing piece 74 The lower surface of the body 22 except for the portion is formed to form a semi-circular shape as a whole.

According to the present invention, the second fastening piece is coupled to the lower edge of the blade, and the first fastening piece and the bearing and the bearing fixing means are coupled to the blade protection plate, and then the first fastening piece and the second fastening piece are coupled by screwing. Since the blade protection plate is installed on the lower part of the blade, the blade protection plate can be easily installed on the lower part of the blade regardless of the size of the blade axis of the mower.

In addition, according to the present invention, when the blade is rotated counterclockwise, the blade formed on the right side of the blade guard on the basis of the direction facing the blade guard from the work table is formed to have a length smaller than the blade formed on the left side of the blade guard When the blade rotates in the clockwise direction, the blade formed on the left side of the blade guard has a length smaller than the blade formed on the right side of the blade guard, so that weeds and twigs easily enter the guide groove, In addition to preventing workers from being injured, weeds and twigs can be easily removed.

In addition, according to the present invention, since the bearing can be removed from the blade protection plate by disassembling the bearing fixing means, when a specific part is damaged, only the corresponding part can be replaced, so that it is easy to replace parts, and blade cutters for lawn mowers. Maintenance and repair costs can be reduced.

In addition, according to the present invention, since the blade protection plate is formed of a metal material, it can provide high durability, and the edge portion (that is, the bent portion) of the wing is bent, so it is easy to maintain the rigidity of the wing portion, and the wing groove on the wing Since the weight of the blade protection plate formed of a metal material can be reduced.

1 is a perspective view of a blade protection device for lawn mowers according to a preferred embodiment of the present invention.
Figure 2 is an exploded perspective view of the blade protection device for the lawn mower shown in FIG.
3 is a cross-sectional view of the blade protection device for the lawn mower shown in FIG.
4 is a plan view of the blade protection plate shown in FIG.
5 is a cross-sectional view according to another embodiment of the blade protection device for the lawn mower shown in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings and the preferred embodiments thereof.

Prior to this, the terms or words used in this specification and claims should not be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain the invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

It should be noted that, in the present specification, the same reference numerals are used to denote the same elements in the drawings, even if they are shown in different drawings.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

1 is a perspective view of a blade protection device for lawn mowers according to a preferred embodiment of the present invention, Figure 2 is an exploded perspective view of the blade protection device for mowers shown in Figure 1, Figure 3 is a blade protection for mowers shown in Figure 1 4 is a plan view of the blade protection plate shown in Figure 1, Figure 5 is a cross-sectional view according to another embodiment of the blade protection device for the lawn mower shown in FIG.

1 to 5, the blade protection device for lawn mowers according to a preferred embodiment of the present invention is installed on the workbench 1 to protect the blade 16 rotated by the power to the lower blade 16 Installed blade protection plate 20; A support (40) installed between the blade protection plate (20) and the work table (1) so that the blade protection plate (20) is supported on the work table (1); And a fastening means 30 for fastening the blade shaft 12 provided with the blade 16 and the blade protection plate 20.

The worktable 1 is formed to have a predetermined length to perform the weed removal operation in the user standing state, one side end of the worktable 1 is provided with a blade shaft 12 which is rotated by power, The blade shaft 12 is provided with a blade 16 for cutting the weed is rotated when the power transmission.

At this time, the blade 16 is coupled to the blade shaft 12 and the bolt / nut coupling by a coupling means such as a nut (14).

On the other hand, the blade protection plate 20 is installed on the lower portion of the blade 16 to protect the blade 16 from the weeding work guide and the foreign matter of the ground as a metal material having rigidity, such as carbon steel, alloy steel, stainless steel Is formed.

The blade protection plate 20 is formed in a circular shape, the body 22 is formed with a through hole 26 in the center; A wing piece 21 formed to protrude from the outer circumference of the body 22; And spaced apart at regular intervals on the outer circumference of the body 22 of the remaining portion except for the portion where the blade piece 21 is formed so that the guide groove 27 into which the weed is drawn is formed on the outer circumference of the body 22. It consists of wings 24.

The body 22 is formed with a fixing groove 60 to which the fastening means 30 is seated and fixed on the outer circumference of the through hole 26.

In this case, the fixing groove 60 has an inner groove 62 with the through hole 26 formed at the center thereof and a height higher than that of the inner groove 62 at the outer circumference of the inner groove 62. Comprising a groove 62 and the stepped outer groove 64, the outer groove 64 has a fixed projection (64a) protruding toward the inner groove 62 from the outer periphery of the outer groove 64 is evenly spaced It is formed to be spaced apart, and between the fixing projection (64a) and the fixing projection (64a) is a fixing hole (64b) is formed.

In addition, the fixing protrusion 64a is formed to have the same height as the outer circumference of the fixing groove 60 or is formed to have a height lower than the height of the outer circumference of the fixing groove 60.

The blade piece 21 is formed to protrude from the outer periphery of the body 22 is coupled to the work table 1 by a support 40 to be described later, the blade protection plate 20 is supported by the work table (1) Be sure to

The wing 24 is formed to protrude spaced apart at regular intervals on the outer periphery of the body 22 of the remaining portion, except for the portion where the wing piece 21 is formed, the number of the weeds is not limited, but the amount of weeds In consideration of the 5 to 9 is preferably formed, the guide groove 27 is formed between the wing 24 and the blade 24 so that weeds or twigs can be introduced.

The wings 24 may be formed in various shapes such as triangular, elliptical, or semicircular shapes, and one side is vertically formed so that weeds are easily introduced into the guide grooves 27 during mowing, and the other side is It may be formed of an inclined surface formed to have an angle of one side and 10 to 80 degrees and a curved surface that is bent from the inclined surface to the guide groove 27.

At this time, the inclined surface and the curved surface formed on one side of the blade 24 is preferably formed in the traveling direction of the lawn mower when weeds are removed.

In other words, in the case of removing the weeds while moving the lawn mower from the left to the right direction (ie, the right-handed lawn mower), the inclined surface and the curved surface are based on the direction of looking at the blade protection plate 20 from the work table 1. Is formed on the right side, when removing the weeds while moving the lawn mower from right to left (ie, left-handed mower) the inclined surface and the curved surface is based on the direction facing the blade protection plate 20 from the work table (1) It is formed on the left side.

This, the wing 24 is a horizontal portion 24a the upper surface is formed flat; A protrusion part 24b integrally formed with the horizontal part 24a and bent upwardly vertically at an end of the horizontal part 24a; And a bending part 24c formed integrally with the protrusion part 24b and bent downward from an end of the protrusion part 24b, and the blade protection plate 20 formed of a metal material on the horizontal part 24a. In order to reduce the weight of the circle), a wing hole 25 having any one of an arc shape such as a circle, an ellipse, and a polygonal shape such as a triangle, a rectangle, and a pentagon is formed.

At this time, the blade 24 is easily rotated by the blade 16 disposed on the upper surface of the blade protection plate 20, the blade 16 of the blade protection plate 20 so that the blade 16 is not in contact with the protruding portion (24b). The distance from the through hole 26 formed in the center to the protrusion 24b is formed to have a length greater than the radius of the blade 16.

On the other hand, the protruding portion 24b prevents the blade 16 from being damaged by preventing the end of the blade 16 from touching the ground when the blade 16 removes weeds or twigs, and the bent portion. 24c is formed to maintain the rigidity of the blade protection plate 20 formed of a metal material.

Such a protrusion 24b and a bent portion 24c are preferably formed on an inclined surface to facilitate the rotation of the blade 16.

And, the lower surface of the wing 24 is formed in the same flat shape as the upper surface or the edge of the wing 24 in the body 22 to reduce friction (or interference of the ground) with the bumpy surface (that is, the bent portion) It may be formed in the form that becomes thinner toward (24c)).

On the other hand, the blade 24 is formed to have a different size on the left and right sides of the blade protection plate 20 on the basis of the direction facing the blade protection plate 20 from the worktable 1 as shown in FIG. Can be.

In this case, the blade 24 formed on the right side of the blade protection plate 20 may be formed to have a length of about 2 to 10% smaller than the size of the blade 24 formed on the left side of the blade protection plate 20.

This is because the blade 16, which rotates counterclockwise when working with the mower from right to left, prevents debris, such as stones, from bouncing to the worker and debris when working with the mower from left to right. Since the blade 24 formed on the right side of the blade protection plate 20 has a length smaller than the blades 24 formed on the left side of the blade protection plate 20 because it does not splash, the weeds or twigs enter the guide groove 27. It can be done easily.

On the other hand, when the blade 16 is rotated in the clockwise direction the size of the blade 24 described above may be formed opposite to each other.

In other words, in the case of a lawnmower in which the blade 16 rotates in the clockwise direction, a blade 24 formed on the left side of the blade protection plate 20 is formed on the right side of the blade protection plate 20 to easily remove weeds or twigs. It may be formed to have a length smaller than the wing (24).

And, the blade protection plate 20 is a nut 14 is the blade protection plate when fixing the first fixing piece 72 and the second fixing piece 74 to be described later to the body 22 in a bolt / nut coupling method In order to prevent damage by protruding to the lower portion of the 20, the place where the nut 14 is disposed is formed in the shape of a groove recessed toward the upper surface of the blade protection plate 20.

The blade protection plate 20 is a portion other than where the nut 14 is disposed for coupling the first fixing piece 72 and the second fixing piece 74 to reduce friction with the uneven ground. This may be formed to form a semi-circular shape as a whole, or only the lower surface of the body 22 may be formed to form a semi-circular shape as a whole.

On the other hand, in the lower portion of the through-hole 26 formed in the center of the body 22, a cover for preventing weeds or foreign matter from entering the blade 16 through the through-hole 26 when the mowing work is seated and coupled It is preferable that the coupling groove 79 is formed.

The support 40 is one side is installed between the protruding frame 21a protruding upward from the blade piece 21 and the work table to support the blade protection plate 20 to the work table (1).

Such, the support 40 is composed of a support frame 44 and the coupling piece 46, it may be formed integrally with the blade protection plate 20.

At this time, when the support 40 is formed integrally with the blade protection plate 20, one side of the support 40 is the bolt (47) and the nut 14 through the coupling piece 46 to the work table (1) Combined with

On the other hand, when the support 40 is configured to be separated from the blade protection plate 20, one side of the support 40 is coupled to the work table 1 through the coupling piece 46 by bolt / nut coupling, The other side is coupled to the protruding frame (21a) by a bolt / nut coupling.

As such, in order for the other side of the support 40 to be coupled to the protruding frame 21a, a coupling hole 21b in the longitudinal direction is formed in the protruding frame 21a.

The fastening means 30 is one side is seated in the fixing groove 60 formed in the body 22 is fixed to the body 22, the other side is in close contact with the lower portion of the blade 16 to the blade shaft ( 12) and one side and the other side are coupled in a reverse screw coupling manner in the opposite direction to the direction in which the blade 16 is rotated to couple the blade protection plate 20 to the lower portion of the blade 16.

Such, the fastening means 30 is a bearing 36 formed in a hollow; Bearing fixing means (70) for fixing the bearing (36) to the blade protection plate (20) in a state of covering a portion of the upper and lower surfaces of the bearing (36); One side is inserted into the hollow hole 37 formed in the center of the bearing 36, the other side is formed to have a larger diameter than one side to protrude to the upper portion of the bearing 36, the seating groove in the center of the upper surface of the protrusion A first fastening piece 34 having a screw line formed therein, wherein a screw line capable of screwing in a direction opposite to the rotational direction of the blade 16 is formed at any one of the inner and outer circumferences of the protruding portion; And the upper surface is formed flat to be in close contact with the lower surface of the blade 16, in the center is formed an insertion hole 31 is inserted into the blade shaft 12 for providing a rotational force to the blade 16, the outer outer Any one of the periphery and the inner periphery is configured to include a second fastening piece 32 formed with a screw thread to be coupled to the protrusion of the first fastening piece 34 in a screwed manner.

In this case, the bearing fixing means 70 is composed of a first fixing piece 72 disposed on the lower surface of the bearing 36 and a second fixing piece 74 disposed on the upper surface of the bearing 36, Each of the first fixing piece 72 and the second fixing piece 74 has an inner plate 73a and 73b having a protruding hole 77 at the center thereof and an outer plate circumference of the inner plate 73a and 73b. 73a and 73b, and outer plates 75a and 75b formed to step together, and outer peripheries of the outer plates 75a and 75b are provided with protrusion pieces 75c spaced at uniform intervals, and the protrusion pieces ( A fastening hole 76 is formed in the center of 75c.

The bearing fixing means 70 is the first fixing piece 72 is seated in the fixing groove 60, the bearing 36 is disposed on the first fixing piece 72, the bearing 36 The second fixing piece 74 is seated on the upper surface of the.

In this case, each of the first fixing piece 72, the bearing 36, and the second fixing piece 74 has a protruding hole 77 formed in the center and a hollow hole 37 formed in the center of the body 22. It is seated on the body 22 to be arranged in line with 26.

On the other hand, the first fixing piece 72, the lower surface of the inner plate (73a, 73b) is seated in the inner groove 62 of the body 22, the protrusion piece 75c formed in the outer plate (75a, 75b) ) Are seated in the fixing groove 60 formed in the body 22 to be disposed between the fixing projections 64a formed in the outer groove 64.

In addition, the second fixing piece 74 has a lower surface of the inner plate (73a, 73b) is disposed on the upper surface of the bearing 36, the protruding pieces (75c) formed on the outer plate (75a, 75b) is It is seated in the fixing groove 60 to be disposed between the fixing projections (64a) formed in the outer groove (64).

The bearing fixing means 70 is a bolt inserted into the fastening hole 76 formed in the first fixing piece 72 and the second fixing piece 74 and the fixing hole 64b formed in the fixing protrusion 64a. Is coupled to the nut in the recess formed in the lower surface of the body 22 is fixed to the blade protection plate 20.

On the other hand, the bearing fixing means 70 is preferably fixed to the body 22 by the bolt / nut coupling as described above, but the blade protection plate 20 by another known coupling method except the bolt / nut coupling method May be fixed).

One side of the first fastening piece 34 is inserted into the hollow hole 37 formed at the center of the bearing 36, and the other side thereof is formed to have a diameter larger than one side, and protrudes to the upper portion of the bearing 36. , The mounting groove 35 is formed in the center of the upper surface of the protrusion, and one of the inner and outer circumferences of the protrusion is formed with a screw thread that can be screwed in a direction opposite to the rotational direction of the blade 16.

At this time, the seating groove 35 formed in the upper portion of the first fastening piece 34 has a nut 14 for coupling the blade 16 and the blade shaft 12 formed at one end of the work table (1) It is formed to have a diameter and height larger than the size of the nut 14 to be seated.

The first fastening piece 34 has one side inserted into the hollow hole 37 formed at the center of the bearing 36 to protrude to the lower portion of the bearing 36, and the first fastening piece 34 In order to prevent the bearing 36 from being separated, the protruding portion is bent to cover a portion of the lower surface of the bearing 36.

The second fastening piece 32 is formed flat so that the upper surface is in close contact with the lower surface of the blade 16, the insertion hole 31 is inserted into the center of the blade shaft 12 to provide a rotational force to the blade 16 ) Is formed, and any one of the outer periphery and the inner periphery of the lower portion is formed with a screw thread to be coupled to the protrusion of the first fastening piece 34 in a threaded manner.

In this second fastening piece 32, as shown in FIG. 3, the protrusion of the first fastening piece 34 is formed with a male screw (that is, a thread is formed on the outer periphery of the protrusion of the first fastening piece 34). In this case, a screw thread is formed on the inner circumference of the lower portion so that the protrusion portion of the first fastening piece 34 is inserted into the lower portion and screwed thereto, and the protrusion portion of the first fastening piece 34 is formed of a female screw as shown in FIG. That is, when a screw line is formed on the inner periphery of the protruding portion 34 of the first fastening piece 34, a screw thread is formed on the outer periphery of the lower portion such that the lower portion of the first fastening piece 34 is inserted into the protruding portion and screwed thereto.

At this time, the first fastening piece 34 and the second fastening piece 32 is screwed in the reverse screw coupling method of the direction opposite to the rotation direction of the blade 16 is the rotation of the blade 16 This is to prevent the first fastening piece 34 and the second fastening piece 32 from being separated.

Blade cutter for lawn mowers according to a preferred embodiment of the present invention made of such a configuration can be combined in the following way.

First, the second fastening piece 32 is brought into close contact with the lower part of the blade 16 so that the blade shaft 12 is inserted into the insertion hole 31 formed at the center thereof, and then the nut is lowered from the second fastening piece 32. The second coupling piece 32 is coupled to the lower blade 16 by coupling to the blade shaft 12 protruding.

On the other hand, after the bearing 36 is disposed between the first fixing piece 72 and the second fixing piece 74, the protrusion pieces 75c of the first fixing piece 72 and the second fixing piece 74 are placed. It is seated in the fixing groove (60) formed in the body 22 to be disposed between the fixing projections (64a) formed in the outer groove (64).

Thereafter, the bolt is inserted into the fastening hole 76 and the fixing hole 64b so that the head portion is disposed on the protruding piece 75c formed on the second fixing piece 74, and concave to the lower surface of the body 22. A nut / bolt is coupled to the nut 14 disposed in the formed groove.

Accordingly, the first fixing piece 72, the bearing 36 and the second fixing piece 74 are fixed to the blade protection plate 20.

After fixing the bearing 36 and the bearing fixing means 70 to the blade protection plate 20, the lower portion of the first fastening piece 34 is inserted into the hollow hole 37 formed in the center of the bearing 36. After insertion, the first fastening piece 34 protruding to the lower surface of the bearing 36 is bent so that the first fastening piece 34 is not separated from the bearing 36.

Thereafter, the protrusion of the first fastening piece 34 and the lower portion of the second fastening piece 32 are coupled in a screwing manner.

As described above, the blade protection device for the lawn mower according to the preferred embodiment of the present invention couples the second fastening piece 32 to the lower blade 16 and the first fastening piece 34 and the bearing 36 and the bearing fixing means. After the 70 is coupled to the blade protection plate 20, the first coupling piece 34 and the second coupling piece 32 are coupled to each other by screwing, so that the blade protection plate 20 is disposed below the blade 16. Because of the installation, regardless of the size of the blade shaft 12 of the lawn mower, it is possible to easily install the blade protection plate 20 in the lower portion of the blade (16).

In addition, the blade protection device for lawn mowers according to a preferred embodiment of the present invention is formed on the right side of the blade guard based on the direction facing the blade guard from the worktable (1) when the blade 16 rotates counterclockwise The blade 24 is formed to have a length smaller than the blade 24 formed on the left side of the blade guard, and when the blade 16 rotates clockwise, the blade 24 formed on the left side of the blade guard is formed on the right side of the blade guard. Since the weeds and twigs are formed to have a length smaller than the wings 24 formed in the guide grooves 27, the weeds and twigs can be easily introduced into the guide grooves 27, thereby preventing the worker from being injured by the debris during the mowing operation, and also easily removing the weeds or twigs. It becomes possible.

And, the blade protection device for lawn mowers according to a preferred embodiment of the present invention is to dismantle the bearing fixing means 70, so that the bearing 36 can be removed from the blade protection plate 20 when a particular part is broken Only the parts can be replaced, making it easy to replace the parts and reducing the cost of maintenance and repair of the blade guard for the mower.

In addition, the blade protection device for mowing according to a preferred embodiment of the present invention can provide a high durability because the blade protection plate 20 is formed of a metal material, the edge portion (that is, bent portion) of the wing 24 is Since it is bent, it is easy to maintain the rigidity of the wing 24, and since the wing hole 25 is formed in the wing 24, it is possible to reduce the weight of the blade protection plate 20 formed of a metal material.

Although preferred embodiments of the present invention have been described with reference to the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. will be.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

1: worktable 12: blade shaft
14 Nut 16: Blade
20: blade shield 21: wing
21a: protrusion frame 21b: coupling hole
22: body 24: wings
24a: horizontal portion 24b: protrusion
24c: bend 25: wing hole
26: through hole 27: guide groove
30: fastening means 31: insertion hole
32, 34: fastener 35: seating groove
36: bearing 37: hollow hole
40: support 44: support frame
46: coupling piece 60: fixing groove
62: inner groove 64: outer groove
64a: fixing protrusion 64b: fixing hole
70: bearing fixing means
72, 74: fixing piece 73a, 73b: inner side plate
75a, 75b: Outer plate 75c: Protruding piece
76: fastening hole 77: protruding hole

Claims (5)

In the blade protection device for lawn mowers provided with a blade protection plate 20 installed in the lower blade 16 to protect the blade 16 is rotated by the power installed on the work table (1),
The blade protection plate 20 includes a body 22 having a through hole 26 in the center thereof; A wing piece 21 formed to protrude from the outer circumference of the body 22; And spaced at uniform intervals on the outer circumference of the body 22 except the portion where the wing piece 21 is formed so that the guide groove 27 into which the weed is drawn is formed on the outer circumference of the body 22. Consists of a wing 24 formed to protrude,
Blade blade protection device for a mower, characterized in that the wing 24 is formed with a wing hole 25 having any one of an arc shape and a polygonal shape. The method according to claim 1,
The blade 24 is a blade protection device for mowers, characterized in that the left and right sides are formed with different lengths based on the direction facing the blade protection plate 20 in the work table (1). The method according to claim 1,
A support (40) installed between the blade piece (21) and the work surface (1) such that the blade protection plate (20) is supported on the work surface (1); And
One side is coupled to the blade shaft 12 in which the blade 16 is installed, the other side is seated and fixed in the fixing groove 60 formed on the outer periphery of the through hole 26 is detachably coupled to the body 22 The one side and the other side further comprises a fastening means 30 screwed in the direction opposite to the rotational direction of the blade 16,
The fixing groove 60 has the inner groove 62 having a height higher than the height of the inner groove 62 at the outer periphery of the inner groove 62 and the inner groove 62 in which the through hole 26 is formed at the center thereof. 62 and the stepped outer groove 64, and the outer projection 64 is spaced apart from the outer periphery of the outer groove 64 by the fixing projections 64a protruding toward the inner groove 62 at even intervals. It is formed so that, between the fixing projections (64a) and the fixing projections (64a), the blade protection device for mowers, characterized in that the fixing hole (64b) is formed. The method according to claim 3,
The fastening means 30,
A bearing 36 formed in a hollow shape;
Bearing fixing means (70) for fixing the bearing (36) to the blade protection plate (20) in a state of covering a portion of the upper and lower surfaces of the bearing (36);
One side is inserted into the hollow hole 37 formed in the center of the bearing 36, the other side is formed to have a larger diameter than one side to protrude to the upper portion of the bearing 36, the seating groove in the center of the upper surface of the protrusion A first fastening piece 34 having a screw line formed therein, wherein a screw line capable of screwing in a direction opposite to the rotational direction of the blade 16 is formed at any one of the inner and outer circumferences of the protruding portion; And
The upper surface is formed flat to be in close contact with the lower surface of the blade 16, in the center is formed an insertion hole 31 is inserted into the blade shaft 12 for providing a rotational force to the blade 16, the outer peripheral edge of the lower And any one of the inner periphery includes a second fastening piece 32 having a threaded line to be coupled to the protrusion of the first fastening piece 34 in a screwing manner,
The bearing fixing means 70 is composed of a first fixing piece 72 disposed on the lower surface of the bearing 36 and a second fixing piece 74 disposed on the upper surface of the bearing 36,
The first fixing piece 72 and the second fixing piece 74 each have an inner plate 73a and 73b having a protruding hole 77 at the center thereof, and an inner plate at the outer circumference of the inner plate 73a and 73b. Comprising the outer plate (75a, 75b) formed so as to step with the (73a, 73b), the outer periphery of the outer plate (75a, 75b) is formed with a projection piece 75c spaced at even intervals, the projection piece A fastening hole 76 is formed in the center of the 75c, and the protrusion pieces 75c are seated in the fixing groove 60 so as to be disposed between the fixing protrusions 64a formed in the outer groove 64. Blade cutter device for mowing. The method of claim 4,
The wing 24,
A horizontal portion 24a having a flat upper surface;
A protrusion part 24b integrally formed with the horizontal part 24a and bent upwardly vertically at an end of the horizontal part 24a; And
Is formed integrally with the protrusion 24b and is formed of a bent portion 24c that is bent downward from the end of the protrusion 24b,
The blade protection plate 20 is a nut 14 is the blade protection plate 20 when the first fixing piece 72 and the second fixing piece 74 is fixed to the body 22 by a bolt / nut coupling method. In order to prevent damage by protruding to the lower part of the bottom), the place where the nut 14 is disposed is formed in the shape of a groove recessed toward the upper surface of the blade protection plate 20, and the first fixing piece 72 and the second Blade protection device for mowers, characterized in that the lower surface of the body 22 of the remaining portion is formed to form a semi-circular shape as a whole except for the place where the nut 14 is disposed for the coupling piece 74.



KR1020120051188A 2012-05-14 2012-05-14 Brush cutter safeguard KR20130127337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120051188A KR20130127337A (en) 2012-05-14 2012-05-14 Brush cutter safeguard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120051188A KR20130127337A (en) 2012-05-14 2012-05-14 Brush cutter safeguard

Publications (1)

Publication Number Publication Date
KR20130127337A true KR20130127337A (en) 2013-11-22

Family

ID=49854961

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120051188A KR20130127337A (en) 2012-05-14 2012-05-14 Brush cutter safeguard

Country Status (1)

Country Link
KR (1) KR20130127337A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101415520B1 (en) * 2013-07-29 2014-07-10 이진수 grass mower rising from the ground
KR200474494Y1 (en) * 2014-03-21 2014-09-22 대성하이텍 주식회사 Buoyancy device of grass cutting blade
CN109079890A (en) * 2017-03-01 2018-12-25 寇长花 A kind of slitting equipment and slitting method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101415520B1 (en) * 2013-07-29 2014-07-10 이진수 grass mower rising from the ground
KR200474494Y1 (en) * 2014-03-21 2014-09-22 대성하이텍 주식회사 Buoyancy device of grass cutting blade
CN109079890A (en) * 2017-03-01 2018-12-25 寇长花 A kind of slitting equipment and slitting method
CN109176640A (en) * 2017-03-01 2019-01-11 寇长花 A kind of slitting equipment and slitting method

Similar Documents

Publication Publication Date Title
KR101583805B1 (en) Structure of brush cutter knives having impact prevention function
KR20130127337A (en) Brush cutter safeguard
KR101469821B1 (en) Lawn trimmer for easily replacing cutter and safely using
KR101078824B1 (en) The weed cuter that have a protect cover
KR101718665B1 (en) Repeat using the lawn mower folding blade
KR101054726B1 (en) Adjustable safety cover for mowers
KR101185487B1 (en) Brush cutter safeguard
KR20130040443A (en) The safety-device for grass eliminator
JP3793178B2 (en) Mower protective cover and mower
KR200439951Y1 (en) The brush cutter for protection a knife
KR101100239B1 (en) Upper cover for weeder blade
CN203851510U (en) Front guard shield for mower
KR200471933Y1 (en) Safeguard of rotary blade of bush cutting machine
KR20180041371A (en) A lawn mower blade having a blade guide
KR101374399B1 (en) Supporting roller for grass eliminator
KR101140624B1 (en) A safety cutting blade for grass eliminator
KR20140005018A (en) Protective device for brush
KR20120118959A (en) Safety device of weeds cutter
KR20140041303A (en) Protective plate support device for bush cutter
KR200439573Y1 (en) Safety device for reaper
KR101570807B1 (en) cutter for weeding and mowing
CN108541459A (en) A kind of protective cover of grass trimmer
KR20140080060A (en) Cover for reaper
KR20130001591U (en) Safty cover for grass eliminator
KR101374761B1 (en) Safety plate for bush cutting machine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right