KR200485564Y1 - Lawn trimmer - Google Patents

Abstract

The present invention aims to provide a safety cover which can be formed by a rotating cover and a rotating plate which are covered by a safety cover when the user mowed the work, The present invention has been made in view of the above problems.
Particularly, in the present invention, the rotary plate is manufactured by an insert method, and the stiffness of the cutting edge and the mounting portion of the rotary cover to be mounted on the insert are increased, so that the rotary blade is frequently replaced or replaced by a wear or breakage Another object of the present invention is to provide a cutter that can prevent breakage of these mounting portions and increase durability even if they are reassembled.
In addition, the present invention has a configuration in which a triangular protruding portion is formed on the cutting edge, and the protruding portion is fitted on a seat formed on the rotary plate, so that the protruding portion is seated accurately at the assembly position. Another purpose is to provide a cutter that allows the cutaway to be assembled.

Description

Cutter {LAWN TRIMMER}

The present invention relates to a cutting machine, more particularly, to a cutting machine that supports a cutting blade and supports a rotary cover attached to a rotary shaft of a cutting machine by inserting a rotary cover to secure the rigidity of the portion to which the cutting blade is mounted, It is possible to increase the durability by preventing the mounting portions from being worn or damaged even if the rotary cover is removed or mounted, and the safety cover can be covered on the bracket for supporting the rotary shaft to cover the rotating body portion, Which can prevent safety accidents caused by the parts.

Applicants have filed and filed applications for "easy-to-replace and safe cutter" as in the following patent documents.

The patent document discloses that the protective cover attached to the rotary housing is rotatably supported by the bearing while increasing the turning radius of the cutting blade mounted on the rotary housing, thereby increasing the working radius of the cutting blade, The object of the present invention is to provide a safe and easy-to-use replacement cutter that can safely cut off a rotatable housing or an object that may cause danger such as a stump or a hemorrhage. .

In addition, the patent document can always receive a support with a predetermined elastic force when working on a workday, so that it is possible to prevent a safety accident caused by excessive rotation of the workday, and to prevent the workday from being hit by other components Another aim is to provide a safe and easy-to-use, ready-to-use cutter that can safely cut and prevent damage or noise from occurring.

In addition, the patent document discloses that when only the fastening bolt that rotatably supports the cutting blade is loosened, it can be directly mounted on the rotary shaft of the conventional cutter, and can be used conveniently and quickly, and can be easily replaced and used. .

However, this conventional cutter has the following problems.

(1) Including the rotating cover and the rotating plate, the rotating part that performs the mowing operation while being actually rotating is exposed to the outside, which may threaten the safety of the operator in the mowing operation.

(2) In other words, the operator performs the mowing while looking at the rotating cover and the rotating plate rotating with the cutting edge protruding outward. At this time, foreign objects such as stones hit the rotating body part during the work, There is a fear that a safety accident occurs due to a sudden rotation as the rotating body portion comes into contact with a tree or a rock.

(3) Due to the characteristics of the cutting machine, it is necessary to separate the cutting blade from the cutting machine due to dullness or breakage during the cutting operation, and then to reassemble or replace with a new cutting blade.

(4) At this time, the cutting blade is usually mounted on the rotary plate by a fastening method. In this fastening process, the rotary plate or the cutting blade often breaks due to improper fastening or tightening too tightly.

(5) In other words, the cutting blade is an important part that rotates and practically performs cutting work. In order to prevent safety accident while the cutting blade is released during the cutting operation, the cutting blade must be tightly fixed to the rotating plate.

(6) However, if the workpiece is tightened too strongly, the workpiece can not be rotated well and the workpiece can not be cut. If the workpiece is too strong, the rotation plate may be damaged. In addition, sometimes the holes for fastening or tightening the fastening screws are worn or damaged.

(7) In particular, such breakage or wear is frequently observed in a cutter using a rotating plate made of the same material as a synthetic resin.

Korean Registered Patent No. 1469821 (Registered on December 1, 2014)

The present invention is conceived in consideration of this point. By constructing the rotary cover and the rotary plate to be covered by the safety cover when the mowing operation is performed by the workers, the rotary parts are rotated, and stones or hard foreign objects are bumped, The present invention has been made to solve the above-mentioned problems in the prior art.

Particularly, in the present invention, the rotary plate is manufactured by an insert method, and the stiffness of the cutting edge and the mounting portion of the rotary cover to be mounted on the insert are increased, so that the rotary blade is frequently replaced or replaced by a wear or breakage Another object of the present invention is to provide a cutter that can prevent breakage of these mounting portions and increase durability even if they are reassembled.

In addition, the present invention has a configuration in which a triangular protruding portion is formed on the cutting edge, and the protruding portion is fitted on the seat formed on the rotary plate, so that the protruding portion is seated accurately at the assembly position. Another purpose is to provide a cutter that allows the cutaway to be assembled.

In order to achieve the above object, a cutting machine according to the present invention includes: a rotary cover 100 formed integrally with an insert 110 which is fitted and fixed to a rotary shaft S of a hair removal machine; A rotary plate 200 fastened to the rotary cover 100 and installed to rotate integrally; At least two cutting blades (300) installed at predetermined intervals so as to be rotatable on the rotary plate (200) and rotating and protruding under a centrifugal force between the rotary cover (100) and the rotary plate (200) to perform cutting work; The adjacent cutting edge 300 is disposed adjacent to the supporting point for supporting the cutting edge 300 so that the adjacent cutting edge 300 is rotated outside the rotating plate 200 to elastically support the side surface of the cutting edge 300, An elastic spring 400 that is elastically held between the rotary plates 200 so as not to be pushed outward; A bearing body 500 installed on the rotation center of the rotary plate 200 so as to freely rotate with the bearing B supported; And a protective cover 600 having an assembling lid 610 at the center of the rotating plate 200 and fastened to the bearing body 500. The rotating plate 200 is fixed to the bearing body 500, The insertion hole 211 for mounting the rotary plate 200 and the mounting hole 212 for mounting the rotary plate 200 are formed by one insert 210 and the synthetic resin is extruded or injected into the insert 210, The bracket for supporting the rotary shaft S is fixedly installed so as not to rotate by inserting the safety cover 700 so as to surround the rotary cover 100 so as not to be exposed to the outside.

Particularly, the cutting 300 can insert a flange 310 protruding in a polygonal shape on one side and guiding the polygonal part to a mounting position of the cutting blade 300 by fitting the polygonal part laterally on the rotary plate 200 The seat surface 213 is formed.

In this case, the polygonal shape is an equilateral triangle.

The insert 210 is made of an aluminum alloy or a metal.

Lastly, the safety cover 700 is further formed with a cut surface 710 so that the insertion hole 211 and the mounting hole 212 can be seen from the outside and can be tightened and relaxed.

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

(1) When the mowing operation is carried out, the rotating cover and the rotary plate exposed to the outside are covered with the safety cover so that they can not be seen by the operator. Therefore, it is possible to prevent safety accidents can do.

(2) Since the safety cover is formed so as to surround the entire rotating cover, it is possible to prevent a safety accident that may occur due to sudden rotation of the rotating body portion due to the corner portion of the rotating body even when the corner portion is mowed .

(3) The rigidity of the rotating plate, which is frequently fastened and loosened by fastening means such as bolts, screws, etc., can be compensated for, thereby enhancing the durability of the cutter.

(4) Particularly, by reinforcing the rigidity of the connecting portion through the inserts and constituting the entire shape with the synthetic resin, it is possible to minimize rigidity and minimize the overall weight increase.

(5) At this time, since the rotary plate is extruded or injection molded by the insert method, it can be easily manufactured in a large quantity.

(6) In addition, since the cutting blade is provided with a flange so that it can be easily positioned after the replacement or repair, anyone can easily assemble or disassemble the cutting blade between the rotary cover and the rotary plate.

FIG. 1 is a perspective view for showing the overall shape of a hair removal machine according to the present invention; FIG.
[Fig. 2] is a cross-sectional view cut to show the joint state of the cutter according to the present invention.
[Fig. 3] is an exploded perspective view of the breaker according to the present invention in order to show the internal structure of the cutter.
FIG. 4 is a perspective view for explaining a configuration of a rotary plate according to the present invention, wherein FIG. 4 (a) is a view before a synthetic resin is integrally formed on an insert, and FIG.
FIG. 5 is a view showing a shape of a cutting edge and a shape of a seat surface according to the present invention; FIG.
FIG. 6 is a plan view of a part of a rotating plate for showing an elastic spring and a storage and withdrawing state of a cutting blade according to the present invention; FIG.
FIG. 7 is a perspective view showing another embodiment of the safety cover according to the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor shall appropriately define the concept of the term in order to best describe its own design It should be construed as meaning and concept consistent with the technical idea of this invention.

Therefore, the embodiments shown in the drawings and the drawings are only exemplary embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations may be present.

(Configuration)

As shown in Figs. 1 to 6, the hair cutting machine according to the present invention includes a rotary cover 100 that rotates together with a rotary shaft S, a rotary plate 200 fastened and fixed to the rotary cover 100, At least two cutting blades 300 mounted on a rotating plate 200 so as to protrude outward and to perform a cutting operation, an elastic spring 400 for supporting the receiving and drawing positions of the respective cutting blades 300, A protective cover 600 fastened and fixed to the bearing body 500 and a safety cover 700 covering the rotary cover 100 and the rotary plate 200.

Particularly, in the present invention, since the safety cover 700 surrounds the rotary cover 100 and the rotary plate 200, which are rotary parts rotating during the mowing operation, a safety accident or rotation It is possible to prevent a safety accident that may occur as the portion is suddenly rotated by collision with a corner portion or the like.

The insertion hole 211 for inserting the rotary cover 100 and the mounting hole 212 for fastening the cutting blade 300 are formed in the insert 210 at this time, So that it is possible to improve the durability of these connecting parts and to prevent breakage or breakage of them easily even if they are often loosened or fastened for replacement or repair with the breakage of the cutting blade 300 It is.

Hereinafter, this configuration will be described in more detail as follows. Here, the reference symbol "S" represents a normal rotation axis for transmitting the rotational force necessary for the cutter.

The rotary cover 100 is a cover for covering the entire rotary plate 200 to be described later on one side, preferably as shown in the figure, so as to cover the upper side without being exposed to the outside, as shown in FIGS. 1 to 4.

As shown in Fig. 2, the rotary cover 100 is structured so as to have its own rigidity by integrally extruding or injecting the insert 110 with the insert 110. Fig. At this time, the insert 110 is formed with a mounting hole 111 in the center thereof so as to be able to insert the rotary shaft S, and the insert 110 can be fastened and fixed to the rotary shaft S inserted in the mounting hole 111 under the rotary plate 200 .

At least two fastening holes 120 are formed in the rotary cover 100 so as to be fastened to the rotary plate 200, which will be described later, as shown in FIGS. 1 and 3. As shown in FIG. In the drawing, three fastening holes 120 are formed.

Lastly, at least two fixing holes 130 are formed in the rotary cover 100 so as to rotate and support the cutting blade 300, as shown in FIG. 1 to FIG. 3. In the preferred embodiment of the present invention, the number of the fixing holes 130 is the same as the number of the coupling holes 120 described above, and the fixing holes 130 are formed adjacent to the coupling holes 120, It is preferable that the rotary cover 100 and the rotary plate 200 are stably supported and fixed while firmly fixing the rotary cover 100 to the rotary plate 200.

The rotary plate 200 is formed in a disc shape as shown in [FIG. 2] to [FIG. 5]. 2, the rotating plate 200 has a size that can be received in the rotating cover 100. When the rotating plate 200 is fastened and fixed to the rotating cover 100, Is installed so as not to be exposed to the outside so as to ensure safety when the mowing operation is performed.

In the preferred embodiment of the present invention, when the rotary plate 200 is mounted on the rotary cover 100 as described above, a predetermined clearance G is formed therebetween as shown in FIG. 2, It is preferable that the cutting blade 300 to be described later is rotatably received and drawn.

4, the rotary plate 200 is provided with an insert 210 and an outer shape 220 that is extruded or injected outside the insert 210, .

At this time, the insertion hole 211 and the mounting hole 212 are formed in the insert 210 at positions corresponding to the above-mentioned fastening hole 120 and the fixing hole 130, respectively, so that the fastening bolt And the like can be easily inserted and penetrated. The insert 210 may be made of an aluminum alloy or a metal material to increase the rigidity of the rotary plate 200 itself.

The outer shape 220 is formed integrally by extruding or injection molding a synthetic resin into a predetermined thickness and shape on the outside of the insert 210. Particularly, each of the insertion holes 211 and the mounting holes 212 is fitted with a nut Or by an insert method in advance, it is preferable that the fixing means such as the bolt inserted into the insertion hole 211 and the mounting hole 212 can be easily fastened so that the fastening operation can be easily performed.

4 (a), a seat surface 213 is formed around the mounting hole 212 in which the cutting blade 300 is mounted. The seat surface 213 is provided for easy replacement of the cutting tool 300, which will be described later with the cutting tool 300. It is preferable that the seating surface 213 is formed so as to be able to be formed naturally by forming the outer shape 220 by forming the shape in advance when the insert 210 is formed.

The cutting 300 is manufactured by a conventional technique of a predetermined arc shape as shown in [FIG. 1] to [FIG. 3]. At this time, the cutting blade 300 is formed to have a length that can be stored between the insertion hole 211 formed in the rotary plate 200 and the mounting hole 212 at a predetermined interval as shown in Fig. In FIG. 6, "300" and "300" represent cutting days according to the present invention, and are for showing the state stored in the rotary plate 200 and the state taken out. For convenience of explanation, This is to distinguish between the stored state and the withdrawn state.

Particularly, the cutting blade 300 is fitted in a fixing means such as a bolt inserted in the insertion hole 211 to be rotatably supported. A flange 310 serving as a bushing is provided at the rotation center, It is preferable that the rotation is smoothly performed while eliminating the noise generated while abutting against the fixing means.

In a preferred embodiment of the present invention, the flange 310 is formed on one side of the flange 310 so as to protrude in a polygonal shape as shown in Fig. This serves to guide the cutting blade 300 into the predetermined position and fit the insertion hole 211 easily and precisely by inserting the projecting portion into the seat surface 213 described above.

Any shape of the polygonal shape can be used as long as it can be inserted by an insertion method. However, it is preferable that the polygonal shape is formed into an equilateral triangle shape so that one of the polygonal shape can be easily fitted to the seat surface 213 and assembled.

At least two of the cutting edges 300 are provided at predetermined intervals, preferably equally spaced, on the rotary plate 200. In the drawing, three cutting blades 300 are mounted at an angle of 120 degrees.

As shown in Figs. 3 and 6, the resilient spring 400 is formed in a shape similar to a " C "shape as a whole by using a plate spring formed in a strip shape. Here, for convenience of explanation, the reference numerals 400 '' and 400 '' refer to a state in which the cutting edge 300 'housed in the rotary plate 200 is supported by the elastic spring manufactured according to the present invention, 200, which is drawn out from the user's body.

It is preferable that the elastic spring 400 is installed so that the vertical portion of the elastic spring 400 surrounds the mounting hole 212 formed in the rotary plate 200 for fastening the rotary cover 100 and the rotary plate 200. Of course, the elastic spring 400 is mounted on the mounting hole 212 as described above, but the present invention is not limited thereto.

Meanwhile, as shown in FIG. 6, one end of the elastic spring 400 'according to the present invention is formed to have the same or similar shape as the protruding end portion of the cutting 300'. This is because when the cutting 300 'is rotated and housed in the rotating plate 200 when the cutting operation is not performed, one of the elastic springs 400' elastically deforms and elastically supports the cutting blade 300 ' 200) to prevent them from escaping.

Further, as shown in Fig. 6, one of the elastic springs 400 "is formed so as to be capable of supporting the center of rotation of the cutting edge 300" protruding from the rotary plate 200. [ This is for the purpose of supporting the drawn cut 300 "by rotating to the outside of the rotary plate 200 by receiving the centrifugal force as the rotary plate 200 rotates for the cutting operation.

2 and 3, the bearing body 500 is configured to mount a protective lid 600, which will be described later, so that it can rotate separately from the rotary plate 200. As shown in Fig. Such a bearing body 500 is formed in a cylinder shape, and a flange is integrally formed at one end.

Particularly, in the bearing body 500, as shown in Fig. 2, two snap rings 510 are inserted into a central portion of the rotary plate 200 in a state where the bearing B is fitted on the outer periphery of the cylindrical shape, .

As shown in FIG. 2, the bearing body 500 is assembled with two snap rings 510 at the lower part of the rotating plate 200, and a nut, which is coupled with the rotary cover 100 through a cylindrical hollow portion, So that they can be assembled or unwound.

The protective cover 600 is formed to be slightly larger than the above-described rotation plate 200 as shown in Figs. 2 and 3, so that even when the rotation plate 200 rotates, It is formed to prevent accidents.

In addition, the protective lid 600 forms an assembly lid 610 at the center. The assembly lid 610 is formed so as to be mounted on the protective lid 600 by being rotated in a one-touch manner or a screw manner. The assembly cover 610 is used to assemble or loosen the nut coupling the rotary cover 100 through the bearing body 500 described above.

The safety cover 700 is formed to have a size capable of covering the rotary cover 100, as shown in Figs. 1 to 3. That is, even if the cutting machine according to the present invention performs cutting work at a corner portion, the safety cover 700 is brought into contact with the corner portion, and the rotary cover 100, the rotary plate 200, So that it is possible to prevent safety accidents that may occur due to sudden rotation.

Such a safety cover 700 is fitted to a bracket that supports the rotation of the rotation axis S by sandwiching the rotation axis S as shown in Fig. At this time, it is preferable that the safety cover 700 is fixed to the bracket not to rotate by fastening, fitting, or the like.

In a preferred embodiment of the present invention, the safety cover 700 preferably further includes a cut surface 710 on one side as shown in FIG. At this time, the incision surface 710 is formed in such a size that the insertion hole 211 and the mounting hole 212 can be fastened or relaxed while being viewed from the outside. This is because when the cutting blade 300 is to be replaced and the screw fastened to the insertion hole 211 is loosened, the rotation plate 200 is rotated by hand to make the insertion hole 211 coincide with the incision surface 710 So that relaxation work and re-fastening work can be performed.

According to the present invention, the cutting machine according to the present invention can improve the durability without breaking or breaking even when the rotary blade and the rotary cover are frequently loosened and assembled by increasing the rigidity of the rotary plate by making the rotary plate into an insert type.

In addition, the present invention is configured such that a protruding portion is formed in a polygonal shape on the cutting edge, and the protruding portion is fitted to the seat formed on the rotary plate, so that the cutting edge can be seated at the assembly position. .

In addition, since the present invention covers the rotating part through the safety cover, it can prevent a safety accident that may occur when the stone strikes against the rotating part or strikes the corner.

100: rotation cover
110: insert
120: fastening hole
130: Fixing hole
200: Spindle
210: insert
211: insertion hole
212: Mounting hole
213: Seat
220: Appearance
300: Extraction
310: Flange
400: Elastic spring
500: Bearing body
600: Protective cover
700: Safety cover

Claims (5)

A rotary cover 100 integrally formed with an insert 110 which is fitted and fixed to a rotating shaft S of a hair removal machine; A rotary plate 200 fastened to the rotary cover 100 and installed to rotate integrally; At least two cutting blades (300) installed at predetermined intervals so as to be rotatable on the rotary plate (200) and rotating and protruding under a centrifugal force between the rotary cover (100) and the rotary plate (200) to perform cutting work; The adjacent cutting edge 300 is disposed adjacent to the supporting point for supporting the cutting edge 300 so that the adjacent cutting edge 300 is rotated outside the rotating plate 200 to elastically support the side surface of the cutting edge 300, An elastic spring 400 that is elastically held between the rotary plates 200 so as not to be pushed outward; A bearing body 500 installed on the rotation center of the rotary plate 200 so as to freely rotate with the bearing B supported; And a protective cover 600 having an assembling lid 610 at the center of the rotating plate 200 and fastened to the bearing body 500,
The rotary plate 200 is formed with an insert hole 211 for mounting the cutting blade 300 and a mounting hole 212 for mounting the rotary plate 200, A synthetic resin is extruded or injected,
The bracket for supporting the rotary shaft S is fixedly installed so as not to rotate by inserting the safety cover 700 so as to surround the rotary cover 100 so as not to be exposed to the outside,
The cutting 300 has a flange 310 protruding in a polygonal shape on one side thereof,
Wherein the rotary plate (200) is formed with a seat surface (213) so that the polygonal part can be inserted laterally and guided to a mounting position of the cutting blade (300).
delete The method according to claim 1,
Wherein the polygonal shape is an equilateral triangle shape.
The method according to claim 1,
Wherein the insert (210) is made of aluminum alloy or metal.
The method according to claim 1,
In the safety cover 700,
Wherein the incision surface (710) is further formed to allow the insertion hole (211) and the mounting hole (212) to be seen from the outside to be fastened and relaxed.

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