WO2015133739A1

WO2015133739A1 - Easily exchangeable and safe lawn trimmer

Info

Publication number: WO2015133739A1
Application number: PCT/KR2015/001270
Authority: WO
Inventors: 강영덕
Original assignee: 강영덕
Priority date: 2014-03-04
Filing date: 2015-02-09
Publication date: 2015-09-11
Also published as: KR101469821B1

Abstract

The purpose of the present invention is to provide a safe and easily exchangeable lawn trimmer wherein a trimmer blade mounted in a rotational housing has a large rotation radius and a protection cover mounted on the rotational housing is supported by a bearing and configured to be rotated so that workability is improved by increasing the operation radius of the trimmer blade, and wherein materials capable of causing risk under the rotational housing, such as small stones or grass, are prevented from interfering with the rotation of the rotational housing or the operation of the trimmer blade. In particular, another purpose of the present invention is to provide a safe and easily exchangeable lawn trimmer wherein not only is a trimmer blade always supported by a predetermined elastic force during operation to pre-empt accidents caused by excess rotation of the trimmer blade, but breakages or noise caused by collision with other components during lawn cutting are also prevented, to facilitate stable lawn cutting. Further, yet another purpose of the present invention is provide a safe and easily exchangeable lawn trimmer wherein a trimmer blade can be conveniently and rapidly exchanged and used since the trimmer blade can be mounted in a rotational shaft of a conventional trimmer by merely releasing fastening bolts by which the blade is rotatably supported.

Description

Easily replaceable and safe mowers

The present invention relates to a safe mowing machine that can be easily replaced and used, and more particularly, to improve workability by widening the working radius of the blade protruding out of the rotating housing while supporting a protective cover under the rotating housing as a bearing for safety. It is about a mower that makes it possible to improve.

The mowers, commonly called mowers, are classified into varieties for rice, moss, and wood for the purpose of work. It can be divided into towing type that the worker pushes and mowing, such as the sticking type that the worker wears on his back or shoulder and the mowing. The mowing machine is classified into a reciprocating blade, a rotary blade, and a fixed blade according to the type of the mowing blade.

The patent document discloses a cutting blade having a rotary system in a strapped manner. The patent document relates to a mower blade, which consists of a rotating body made of synthetic resin or alloy and a cutting blade made of high carbon steel, respectively, and an air guide groove forming an air layer on the bottom of the rotating body. A mower blade for reducing mowers, wherein the mower blade is mounted on the workbench's workbench and divided into a rotating body and a cutting blade so that the cutting blade emerges by centrifugal force, wherein the rotating body is made of synthetic resin or alloy. It is composed of one lower disk and the upper disk, and when combining them, at least two cutting blade mounting parts are configured so that the cutting blade separately configured in the cutting blade mounting portion is ejected and driven by centrifugal force, but the lower disk constituting the rotating body Forming and cutting a plurality of air guide grooves for forming an air layer on the outer surface of the Semicircular cutting grooves are arranged at equal intervals on the front surface of the involute curve of the blade so that when the blade does not rotate, it always enters the inside of the body and is hidden, and is formed on the outer surface of the lower disk that rotates at high speed during use. By forming an air layer below the rotating body by a plurality of air guide grooves for forming the air layer, the rotating body is lifted from the ground at regular intervals to lift the weight apart from the ground, and to prevent it from colliding with stones on the ground, Since the cutting blade is protruded by centrifugal force and reenter, it protects the cutting blade and is safe for handling.The blade is formed with an involute curve around the leading edge of the rotating direction, so the cutting blade is excellent for cutting and When hit, the cutting blade enters the inside of the rotating body for excellent safety. The overall weight is low and only the cutting blade is made of high-strength material, and the cost is reduced.If the cutting blade is worn out due to repeated use, the lower disc is separated and the cutting blade is easily replaced to create a new effect that is easy to maintain. do.

However, such a conventional mowing machine has the following problems.

(1) The cutting blade (cutting blade) produced in the shape of an arc is mounted so as to rotate on one side, and the other side is caught by the stopper, thereby limiting the rotation angle of the cutting blade.

(2) Thus, the limit of the cutting blade rotation is one of the factors that reduce the workability because there is a limit on the rotation diameter of the blade, that is, the working diameter.

(3) In other words, the cutting blade receives centrifugal force generated as the rotating body rotates at the rotational center thereof, and projects outwardly from the rotating body. At this time, in the mowing operation, the working area is a portion obtained by subtracting the area of the rotating body from the area of the blade shape where the cutting blade protrudes outward and the center of rotation of the rotating body.

(4) However, since the radius from the blade edge of the blade to the center of rotation of the rotating body becomes smaller, the conventional mowing machine becomes a work area that much smaller. When mowing in such an area, more time is required.

(5) In addition, the conventional mowing machine to solve the safety problem by forming an air layer by using the force generated as the rotating body rotates for the mowing operation to fall off the ground, but mounted on the lower portion of the rotating body The friction plate may slide on the ground.

(6) As such, slippage of the friction plate often leads to accidents that cause workers to be injured or to mow objects other than those intended to be mowed with a blade that rotates at high speed.

(7) Since the worker must keep the friction plate in contact with the ground, the work fatigue of the worker is increased to reduce the work efficiency.

(8) Conventional blades appearing by centrifugal force of the disc are stored safely in the disc when they encounter obstacles, but the disc itself, which rotates at high speed, can prevent the collision with obstacles.

(9) The disk that rotates at such a high speed may damage the disk if a collision occurs, such as being caught or bounced on rubble, tree branches, roots, etc. during mowing, and the worker's safety as the blade is separated or the mower is missed. There is a problem that can threaten, and the mower itself is broken and must be disposed of.

(10) As the working range of the blade is small, the working efficiency for mowing work decreases, which not only increases the working time but also increases fuel consumption.

(Patent Document 1) Korean Registered Patent No. 10-1317832 (Registration Date: October 07, 2013)

The present invention has been invented in view of such a point, and the protective cover mounted on the rotary housing can be rotated by bearing support while increasing the radius of rotation of the blade to be mounted on the rotary housing, thereby widening the working radius of the blade. Easily replaceable and safe mowers for safe mowing operations while improving workability and preventing dangerous objects such as rubble or grass under the rotatable housing from interfering with the rotation or mowing of the rotatable housing. The purpose is to provide.

In particular, the present invention can be supported by a predetermined elastic force at all times when the cutting blade is working in advance to prevent the safety accident caused by excessive rotation of the cutting blade as well as hitting the other components during the cutting operation Another object is to provide an easy replaceable and safe mower that can be safely mowed by preventing damage or noise occurring.

In addition, the present invention is to provide a convenient mowing machine that can be easily replaced and used easily and quickly replaceable can be used immediately mounted to the rotating shaft of the conventional mowing machine if only loosening the fastening bolt to support the mowing blade is another object There is this.

Easily replaceable and safe mowing device according to the present invention for achieving this object, the rotary housing 100 integrally formed with the insert 110 is fixed to the rotary shaft (S) of the mowing machine; Fastening and fixing with at least two fastening bolts 211 at equal intervals on an imaginary arc centered on the rotary shaft S at the lower portion of the rotary housing 100, and coupled to the rotary housing 100 in a one-touch manner. Rotating plate 200; At least two cutting blades 300 which are installed to rotate on each of the fastening bolts 211 and are accommodated between the rotary housing 100 and the rotary plate 200 and installed to rotate outwardly; When the fastening bolts 211 are installed adjacent to the support points for supporting the rotation, the adjacent cutting blade 300 rotates out of the rotating plate 200 to elastically support the side thereof, and the neighboring cutting blade 300 is the rotating housing 100. An elastic spring 400 that is elastically engaged so as not to fall out when it is received between the rotary plate 200 and the rotary plate 200; A bearing housing 500 fitted to the seat plate 230 protruding in a circular shape around the rotating shaft S on the rotating plate 200; And a flat shape surrounding the entire lower portion of the rotary housing 100 without being interfered when the cutting blade 300 is received and drawn out, and to the bearing housing 500 via the bearing 520 so as to rotate. A protective cover 600 having an insert 610 to be coupled; including, but the cutting blade 300 is formed in an arc shape having a predetermined width as a whole, the blade is formed on one edge, the fastening bolt ( 211) is characterized in that the locking groove 320 is formed so as to be caught in the elastic spring 400 on the other side of the hinge hole 310 and the rotation center.

In particular, the rotary housing 100 and the protective cover 600 is characterized in that the insert injection inserting the insert (110, 610) of the metal material (SUS).

In addition, in order to fasten the fastening bolt 211, the insertion plate 210 is formed in the rotating plate 200, and the insert hole 210 is unevenly coupled so that the insert 220 does not fall out, but the insert 220 is It is made of a cylindrical shape to be fitted to the cutting blade 300 and the center is characterized in that the female screw 221 is formed to fasten the fastening bolt 211.

In addition, the elastic spring 400 is made of a "U" shape as a whole, the elastic locking jaw (410a) is formed on one side so that the cutting blade 300 is caught, the lower portion of the seat surface 230 and in advance It is sandwiched between the fixing block 420 installed to be spaced apart by a predetermined interval, and between the fixing block 420 and the seating surface 230 is fastened by fixing the mounting block 430 so that the elastic spring 400 does not fall out do.

Finally, the elastic spring 400 is made of a "U" shape of the two faces facing each other outwardly, the opposite ends of the cutting blade 300 and the rotation of the cutting blade 300, respectively rotating on both sides facing each other Elastic latching jaw (410, 410 ') is formed so that the edge of the portion to be caught; between the seating surface 230 and the fixed block 420 fixed to the rotating plate 200 by a predetermined interval, the elastic spring ( The lower portion of the "U" shape of 400 is inserted into contact with the seat surface 230 to fasten the mounting block 430 so as not to fall out; the cutting blade 300 is rotated when accommodated on the rotating plate 200. The end is a long blade that is caught on one elastic locking jaw 410, or a short blade made so that the edge portion of the rotating center portion is caught on the other elastic locking jaw (410 '), it is used to replace It features.

Easily replaceable and safe mowing machine according to the present invention has the following effects.

(1) It is convenient to use the mower according to the present invention through a simple replacement process of removing the mowing blade from the existing mowing machine and fixing the rotating housing instead of the same, and then fixing the rotating plate under the rotating housing.

(2) Since one side of the cutting blade is rotatably supported and the other side can be rotated out of the rotating housing, the working radius can be widened by the length of the cutting blade, and accordingly, a large amount of mowing can be mowed at a time, thereby improving cutting efficiency. Can improve.

(3) The protective cover is installed under the rotating plate supporting the actual cutting blade to support the bearing, so that the protective cover can be rotated separately from the rotating plate so that the rubble or grass roots enter or touch the inside of the rotating plate or rotating housing. Safety accidents that may occur can be prevented in advance.

(4) The safety cover can be increased by using the bearing to move separately from the rotating plate while the protective cover is in close contact with the working surface.

1 is a perspective view for showing the overall configuration of the mower according to the first embodiment of the present invention.

Figure 2 is an exploded perspective view showing a state in which the configuration is separated to show the configuration of the head portion for mounting the mowing blade of the mowing machine according to the first embodiment of the present invention.

Figure 3 is a cross-sectional view for showing a coupling state of the head portion for mounting the mowing blade of the mowing machine according to the first embodiment of the present invention.

Figure 4 is a bottom view for showing the internal configuration of the rotary housing according to the first embodiment of the present invention.

Figure 5 is a perspective view for showing the insert inserting the rotating housing and the insert according to the first embodiment of the present invention.

Figure 6 is a plan view for showing the top surface of the rotating plate according to the first embodiment of the present invention.

Figure 7 is a bottom view for showing the bottom surface of the rotating plate according to the first embodiment of the present invention.

8 is a plan view of a rotating plate for showing a state in which the mowing blade according to the first embodiment of the present invention mounted on the rotating plate.

Figure 9 is a plan view of the rotary plate for showing the state that the cutting blade is received and withdrawn from the rotary plate according to the first embodiment of the present invention.

10 is an exploded perspective view illustrating a state in which the elastic spring according to the first embodiment of the present invention is removed from the rotating plate to show a mounting state.

11 is a cross-sectional view showing a mounting state of the elastic spring according to the first embodiment of the present invention.

Figure 12 is a perspective view of the front end to show the shape of the insert to enter the protective cover according to the first embodiment of the present invention.

Figure 13 is a plan view for showing the shape of the mowing blade and the elastic spring according to the second embodiment of the present invention.

14 is a perspective view for showing a modification of the mounting block for mounting the elastic spring according to the third embodiment of the present invention.

[Description of the code]

100:

rotary housing

110, 220, 610: insert

111: mounting hole 112: engaging projection

120, 250: gush 130: fastening hole

140, 230, 240: seat 200: rotating plate

210: insertion hole 211: tightening bolt

212: iron 221: female thread 222: groove

241: combined groove 300: cutting day

310: hinge hole 320: locking groove

400: elastic spring 410, 410 ': locking jaw

500: bearing housing 510: fastening bolt

520: bearings 521, 611: snap ring

600: protective cover

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. Prior to this, terms or words used in the specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly define the concept of terms in order to best explain their invention. In accordance with the principle that it can be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

Therefore, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be variations and variations.

1 to 12, the mowing machine according to the first embodiment of the present invention, the rotary housing 100 fixed to the rotary shaft (S) for providing a rotational force, the rotary plate 200 for fastening and fixing the lower portion of the rotary housing 100 At least two cutting blades 300 mounted on the rotating plate 200 so as to be rotatable at a predetermined position, and the cutting blade 300 accommodated between the rotating housing 100 and the rotating plate 200 are elastically fixed and the cutting blade ( As the 300 rotates out of the rotating housing 100, an elastic spring 400 supporting the rotating housing 100, a bearing housing 500 installed to support the bearing on the rotating plate 200, and a lower portion of the bearing housing 500 are mounted. Protective cover 600.

In particular, the present invention in the state in which the rotary housing 100 is mounted on the rotating shaft (S), by rotating the rotary plate 200 to the lower portion of the rotary housing 100 with at least two fastening bolts 211, the conventional cutting blade In place of the mower according to the invention can be used.

In addition, the present invention by allowing one side of the cutting blade 300 to be mounted on the rotating plate 200 to be completely removed from the rotating plate 200, the cutting operation can be made, thereby widening the working radius to improve the work efficiency.

In addition, the present invention is to prevent the safety accident by preventing the weed or gravel, etc. from entering the rotating component side through the protective cover 600 receives the bearing support in the lower rotating plate 200.

Hereinafter, this configuration will be described in more detail. Here, reference numeral "E" denotes a power generator, such as an engine, which is typically used for mowing on a shoulder or over the shoulder, and "S" denotes a rotating shaft that receives and receives power generated from the power generator.

Rotational housing 100, as shown in Figures 1 to 3, is configured to accommodate other components to be described later. In particular, since the rotary housing 100 rotates together with the rotating shaft (S), it is preferable to form a symmetrical shape. Thus, the present invention shows an example in which the rotary housing 100 is formed in a truncated cone shape. Here, the rotary housing 100 is advantageous in rotation due to the low rotational resistance and the like, but is manufactured in a symmetrical form, but is not limited thereto.

Such a truncated conical shape, when the mowing blade 300 is working at a predetermined angle not parallel to the ground when working with the mowing according to the present invention, the rotary housing 100 forms a wide angle to hit the obstacle, such as wood It can widen the working angle. In other words, the mowing machine according to the present invention can be mowing operation by increasing the angle formed by the mowing blade 300 and the ground.

In addition, as shown in FIGS. 3 to 5, the insert 110 is integrally formed in the rotary housing 100 to fasten the rotary shaft S. At this time, the housing 100 is made of synthetic resin and the insert 110 is made of a sus (SUS) of a metal material in the form of a disc to ensure its own rigidity and prevent the eccentricity when rotating. In addition, a mounting hole 111 is formed in the insert 110 to fix the rotary shaft S at the center thereof. Lastly, the insert 110 further forms a coupling protrusion 112 in a shape such as a quadrangular or parallelogram at a predetermined interval as shown in FIG. 5, so that the mutual coupling force between the rotary housing 100 and the insert 110 is formed. Configure to improve.

In addition, as shown in FIG. 4, the rotatable housing 120 is provided with a grate 120 to compensate for the rigidity of the rotatable housing 100. At this time, the grate 120 is preferably produced symmetrically in all directions, such as radial, with respect to the center of the rotation center of the rotation housing 100 to prevent the weight due to the gush 120 to be oriented in either direction.

In addition, the rotation housing 100 is formed in the inner surface, as shown in Figure 3 and 4, a fastening hole 130. At this time, the fastening hole 130 is for fastening and fixing the rotating plate 200 to be described later to form at least two. However, the fastening holes 130 preferably do not exceed four. This is fastening bolts 211 to be the center of rotation of the cutting blade 300 to be described later to each fastening hole 130, if there are more than four fastening holes 130 is limited to making the length of the cutting blade 300 long I can receive it. This is because the limit of the length of the mowing blade 300 is to act as a factor that reduces the mowing efficiency of the mowing machine according to the present invention. This working efficiency will be described in detail with reference to the cutting blade 300.

In a preferred embodiment of the present invention, the fastening hole 130, as shown in Figure 4, it is preferable to produce the same angle (θ) relative to the mounting hole 111. This is to allow the cutting blade 300 to be mounted in each fastening hole 130 to rotate without being eccentric to either side. 3 shows an example in which three fastening holes 130 are formed at a 120 ° angle.

In addition, the seating surface 140 is formed in the rotary housing 100 as shown in FIG. 4. Seat 140 is to allow the elastic spring 400 to be easily mounted in a predetermined position. The seat surface 140 is formed at a predetermined interval at a predetermined position on one side of the fastening hole 130 described above.

Finally, the rotary housing 100, as shown in Figure 11, is formed with an elastic coupling protrusion 150. The elastic coupling protrusion 150 is elastically deformed with the coupling groove 241 formed in the rotary plate 200 as the rotary housing 100 is placed on the rotary plate 200 to be described later, and is easily fitted and fixed in a one-touch manner. It is intended to be subtracted. At this time, the elastic coupling protrusion 150 is preferably formed at a position where rotational interference with the cutting blade 300 to be mounted on the rotating plate 200 to rotate. The formation position is formed at a position facing the coupling groove 241 to be described later.

In FIG. 1 and FIG. 2, reference numeral "211a" denotes a fastening bolt for fastening to the fixing block 420 integrally formed on the rotating plate 200 which will be described later, and reference numeral "141" in FIG. The insertion holes for fitting the fastening bolt 211 to the rotating housing 100 are shown, respectively.

The rotating plate 200 is formed in a disk shape as shown in Figs. 2, 3, 6, and 7. In particular, the rotating plate 200 forms a seating surface 230 to mount the bearing housing 500 to be described later in the center. Seat surface 230 is formed in a round container shape, the upper surface is formed with a fastening hole 231 to fasten the bearing housing 500. 6 shows an example in which six fastening holes 231 are formed at equal intervals.

In addition, an insertion hole 210 is formed in the rotating plate 200 as shown in FIG. 6. The insertion hole 210 is for allowing the fastening bolt 211 fitted through the fastening hole 130 described above to be fastened. Thus, the insertion hole 210 is formed in a position facing the fastening hole 130, the inner surface forms a female screw so that the fastening bolt 211 can be fastened.

In a preferred embodiment of the present invention, by the fastening of the fastening bolt 211, the fastening bolt 211 is mounted so that the cutting blade 300 is rotatable, between the rotating housing 100 and the rotating plate 200 Install to rotate outward. At this time, in the present invention, the insert 220 may be further configured so that the cutting blade 300 does not directly contact the fastening bolt 211.

2 and 3, the insert 220 is manufactured in the form of a cylinder so as to be fitted into the hinge hole 310 of the mowing blade 300 to perform an axial function. In addition, an internal thread 221 is formed on the inner surface to fasten the fastening bolt 211. At this time, the insert 220 is provided with a groove 222 in the shape of a strip on the outer surface, and is mounted so as not to be caught by the convex portion 212 formed on the inner surface of the insertion hole 210 corresponding to the groove 222. . The insert 220 is preferably made of metal (SUS) to ensure sufficient self rigidity.

In addition, in the preferred embodiment of the present invention, the insert 220 has been described as an example made in the shape of a cylinder, as shown in Figure 3 in the form of gradually narrowing the portion to be fitted to the fastening hole 130 toward the outside Fabrication may also be configured to be easily fitted between the insert 220 and the fastening hole 130.

On the other hand, in the rotating plate 200, as shown in Figs. 6 and 10, another seat surface 240 is formed at a position facing the seat surface 140 described above. These seat surfaces 140 and 240 are spaces for mounting the fixed block 420 and the mounting block 430 for mounting the elastic spring 400 to be described later in a predetermined position. In addition, a fastening hole 242 is formed in the seat surface 240 to fasten the fixing block 420 and the mounting block 430. At this time, the fixing block 420 is fastened and fixed to the fastening hole 242 formed in the outer side of each seat surface 240 in advance, and then the mounting block 430 between the fixing block 420 and the seat surface 230. ).

Here, the fixing block 420 may be formed integrally with the rotating plate 200 to be in the position to fasten in this way. This is because the workability may be improved since the number of blocks to be fastened and the mounting block 430 may be closely attached to the fixed block 420 integrally formed.

In a preferred embodiment of the present invention, the elastic spring 400 is fitted between the side of the seat surface 230 and the mounting block 430. Accordingly, it is preferable to form the locking step 431 at the upper portion of the mounting block 430 as shown in FIGS. 10 and 11 so that the elastic spring 400 does not escape between the gaps.

In addition, in the preferred embodiment of the present invention, the seat surface 240 is described as formed in advance in the rotating plate 200, but the fixed block 420 and the mounting block 430 is fastened and fixed so that the mounting position is clear As can be seen, the seat surface 240 may not be formed on the rotating plate 200.

In addition, in the preferred embodiment of the present invention, the fixing block 420, as shown in Figure 10 and 11, may be manufactured separately from the rotating plate 200, or may be integrally manufactured and configured. In addition, the fixing block 420 is fastened so that the rotating housing 100 and the rotating plate 200 can be fixed together using the fastening bolts 211a to thereby bond the coupling force between the rotating housing 100 and the rotating plate 200. It is desirable to be able to improve.

In addition, in the preferred embodiment of the present invention, the coupling groove 241 is formed on the edge of the rotating plate 200 adjacent to the fixing block 420, as shown in FIGS. The coupling groove 241 is for allowing the above-mentioned elastic coupling protrusion 150 to be easily coupled as the one-touch method is pressed. The coupling groove 241 is formed at the position where the cutting blade 300 can be rotated about the insertion hole 210, thereby eliminating rotational interference.

Finally, the bottom surface of the rotating plate 200, as shown in Figure 7 to form a grate 250 to supplement the rigidity. At this time, the grate 250 is similar to the grate 120 of the rotary housing 100 described above, and is produced symmetrically in all directions, such as radial, with respect to the center of rotation center of the rotary plate 200 to grate 250 It is desirable to prevent the resulting weight from lean on either side.

Rotating plate 200 made in this way, as shown in Figure 3, is fastened to the lower part of the rotary housing 100 by a fastening bolt 211, the cutting blade 300 to be described later is rotated based on the fastening bolt 211 to rotate the housing Mounted to escape between the 100 and the rotating plate (200).

The cutting blade 300 is produced in the shape of an arc having a predetermined width, as shown in FIGS. 1 to 3, 8, and 9. And the outer edge forms the blade necessary for mowing.

The cutting blade 300 has a hinge hole 310 formed at one side as shown in FIG. 3, and the insert 220 is fitted into the hinge hole 310 so that the insert 220 is centered in FIGS. 8 and 9. Install to rotate as shown.

And the cutting blade 300 forms the locking groove 320 in the other side like FIG. When the cutting groove 300 is accommodated between the rotary housing 100 and the rotary plate 200, the locking groove 320 is used to prevent it from being caught by the elastic spring 400 to be described later as shown in FIG. 9.

The cutting blade 300 made as described above is mounted to rotate about the insert 220 as shown in FIG. 8, and the rotation radius at this time is as indicated by the dotted circle in FIG. 8. This results in the working radius of the mowing machine according to the present invention subtracting the area of the rotating plate 200 from the circled area of the dotted line. This can be seen that the longer the length of the cutting blade 300, the larger the working radius, based on the rotating plate 200 of the same area. However, the cutting blade 300 is preferably mounted on at least two of the rotating plate 200 to be prevented from being pulled to either side when rotating.

In a preferred embodiment of the present invention, the cutting blade 300, as described above, it is preferable to use two to four mounted. This is because the lower the number of cutting blades 300 can be formed longer the length of the working radius can be expected to increase the effect, when four or more cutting blades (300) is placed there is a limit in making the cutting blades long This is because the effect of increasing the radius cannot be expected.

3 shows an example in which three cutting blades 300 are arranged at equal intervals on an imaginary arc centered on a rotation axis S. FIG.

As shown by the dotted lines in FIGS. 2, 3, and 9, the elastic spring 400 supports one side of the mowing blade 300 when the mowing blade 300 rotates on the rotating plate 200 and goes outward. Elastic support is performed to prevent abnormal rotation and noise. In addition, when the elastic spring 400 is accommodated on the rotating plate 200 as indicated by the solid line in FIG. 9, even if the rotating plate 200 moves, the cutting blade 300 is disposed between the rotating housing 100 and the rotating plate 200. An elastic locking action is prevented from escaping out of the space.

2, 10, and 11, the elastic spring 400 is formed by folding a strip-shaped elastic member in a "U" shape with both surfaces facing outward.

In addition, one of the facing surfaces is formed with a locking step (410a) in the middle portion of the length. The locking step 410a is manufactured in the same shape as the locking groove 320 of the cutting blade 300 as described above, while the locking groove 320 causes interference with the locking step 410a as the cutting blade 300 rotates. It is elastically deformed to allow a locking function.

The elastic spring 400 thus formed has a "U" in the space between the fixing block 420 fitted to the seat surface 240 described above and the seat surface 230 described above, as shown in FIGS. 2, 10 and 11. It is installed so that the lower part of the shape is fitted. At this time, the fixing block 420 is fastened and fixed to the fastening hole 242 in a state of being placed in a predetermined position by the guide of the coupling groove 241 formed in the seat surface 240.

The mounting block 430 is fastened and fixed on the fixing block 420. The mounting block 430 is fastened and fixed so as to span between the fixing block 420 and the seating surface 230 to prevent the elastic spring 400 placed between the fixing block 420 and the seating surface 230 from falling out. . In this case, the mounting block 430 may be manufactured in the form of a hexahedron, or may be formed stepped when there is a height difference between the fixing block 420 and the seat surface 230.

The elastic spring 400 secures the cutting blade 300 by engaging the locking groove 320 in the locking jaw 410a, and the cutting blade 300 has the centrifugal force generated by the rotation of the rotary shaft S. While rotating the elastic force of the rotating plate 200 will be rotated outward.

2 and 3, the bearing housing 500 is fitted to the seat surface 230 so as to be fastened and fixed. The bearing housing 500 is fastened and fixed to the seat surface 230 with a fastening bolt 510, and a space is formed in the bearing housing 520. In this space, the snap ring 521 is mounted to prevent the bearing 520 from being separated.

The protective cover 600 is manufactured in the planar shape with the lower surface of the rotating plate 200 like FIG. 2 and FIG. The insert 610 is integrally injected into the protective cover 600 at the center thereof, and the bearing 520 is fitted to the insert 610 to be fixed by the snap ring 611.

Here, the insert 610 is preferably made of a metal material (SUS) and manufactured by insert injection molding integrally with the protective cover 600.

The insert 610 may be manufactured in various forms, but one example is illustrated in FIG. 12. The insert 610 forms a protrusion 611 for mounting the bearing 520 in the center of a disc shape integrally injected with the protective cover 600. In particular, the protrusion 611 is filled with a synthetic resin that is the material of the protective cover 600 therein, it can be manufactured in various internal shapes such as irregularities or cylinder shape so that the synthetic resin is firmly filled.

The protrusion 611 is to form a step on the surface so that the inner ring of the bearing 520 is fitted over the predetermined position, the upper portion of the protrusion 611 to fix the snap ring 611 to fix the bearing 520 does not fall out The groove 612 is formed.

In a preferred embodiment of the present invention, the protective cover 600 is preferably manufactured in a form surrounding the entire lower portion of the rotary housing 100 described above. This supports the protective cover 600 in the lower portion of the rotating housing 100 that rotates at a high speed, so that even if the rotating housing 100 rotates, the obstacles such as rubble or tree roots that are embedded in the ground are naturally stuck to the ground. This is to prevent the obstacles from coming into contact with the rotating housing 100 that rotates at a high speed, so that the rotary housing 100 can prevent the cutting blade 300 from being damaged and thereby prevent a safety accident.

As described above, the mowing machine according to the present invention can not only improve the working efficiency by making the cutting radius of the cutting blade large as described above, but also the protective cover is supported by the bearing under the rotating plate, so the gravel or mowed grass, etc. It is possible to safely mow by preventing entry into the mowing blade or rotating housing.

The mowing machine according to the second embodiment of the present invention, as shown in Figure 13, is to modify the elastic spring 400 'to be used by replacing the short cutting blade 300'. Thus, the same components as in the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

In the elastic spring 400 ′ according to the second embodiment, as shown in FIG. 12, the entire shape in which the opposite sides face outwards is formed in a “U” shape. At this time, the elastic spring (400 ') is formed on each of the opposite facing elastic locking step (410, 410').

Here, one elastic locking jaw 410 is for fixing the cutting blade 300 formed at the end of the length of the long cutting blade 300, as shown in Figure 8 and 9 of the first embodiment, the other elastic locking jaw 410 ') Is for use when elastically supporting the cutting blade 300' short in length as shown in FIG.

Accordingly, the cutting blade 300 'having a short length cannot be caught by the elastic locking jaw 410, and the cutting blade 300' has a locking groove (not shown) at the edge of the rotating portion as shown in FIG. 320 '). In this case, the locking groove 320 'is formed at the position where the cutting blade 300' is elastically locked to the elastic locking jaw 410 'when the blade is accommodated between the rotary housing 100 and the rotating plate 200.

The mowing machine according to the second embodiment made in this way is equipped with a short cutting blade (300 ') to the rotary plate 200 when working in a place with a lot of trees, such as an orchard or narrow stone or crevice and work in the place above When the long cutting blade 300 is equipped with a mowing operation.

The harvester according to the third embodiment of the present invention, as shown in Figure 14, compared with the first and second embodiments, the difference in the shape of the mounting block (430a, 430b, 430c) for supporting and fixing the elastic spring 400 There is. Here, only these mounting

blocks

430a, 430b, and 430c will be described.

As shown in Fig. 14A, the mounting block 430a according to the third embodiment integrally constitutes the fixed block 420 and the mounting block 430 in another embodiment. This is to improve the mountability by fastening and fixing one mounting block (430a) rather than mounting the two blocks on the rotating plate (200).

The mounting block 430b according to the third embodiment is formed by cutting in the form of the operation groove 432 with respect to both surfaces thereof as shown in Fig. 14B. The actuation groove 432 serves to provide a space in which the elastic spring 400 can cause elastic deformation, that is, a space that can be deformed when the elastic spring 400 is deformed by rotational interference with the mowing blades 300 and 300 '. .

The mounting block 430c according to the third embodiment has the operation recess 432 described above with reference to FIG. 14 (c), so that the mounting block 430c can be mounted on the rotating plate 200 as it is by attachment or adhesion. This improves the assembly workability of the mounting block 430c and ensures a deformation space of the elastic spring 400.

Claims

A rotary housing 100 integrally formed with an insert 110 that is inserted into and fixed to the rotary shaft S of the mower; Fastening and fixing with at least two fastening bolts 211 at equal intervals on an imaginary arc centered on the rotary shaft S at the lower portion of the rotary housing 100, and coupled to the rotary housing 100 in a one-touch manner. Rotating plate 200; At least two cutting blades 300 which are installed to rotate on each of the fastening bolts 211 and are accommodated between the rotary housing 100 and the rotary plate 200 and installed to rotate outwardly; When the fastening bolts 211 are installed adjacent to the support points for supporting the rotation, the adjacent cutting blade 300 rotates out of the rotating plate 200 to elastically support the side thereof, and the neighboring cutting blade 300 is the rotating housing 100. An elastic spring 400 that is elastically engaged so as not to fall out when it is received between the rotary plate 200 and the rotary plate 200; A bearing housing 500 fitted to the seat plate 230 protruding in a circular shape around the rotating shaft S on the rotating plate 200; And a flat shape surrounding the entire lower portion of the rotary housing 100 without being interfered when the cutting blade 300 is received and drawn out, and to the bearing housing 500 via the bearing 520 so as to rotate. Including; protective cover 600 having an insert 610 to engage;

The cutting blade 300 is formed in a circular arc shape having a predetermined width as a whole, the blade is formed on one side, the fastening bolt 211 is fitted on one side and the other side of the hinge hole 310 to be the center of rotation Easily replaceable and safe mowing machine, characterized in that the engaging groove 320 is formed to be caught in the elastic spring (400).
The method of claim 1,

The rotating housing 100 and the protective cover 600 is insertable insert insert inserting the insert (110, 610) of the metal material (SUS), easy replacement and safe mowing machine.
The method of claim 1,

In order to fasten the fastening bolt 211 to form the insertion hole 210 in the rotating plate 200 and the insert hole 210 is coupled to the concave-convex so as not to fall out,

The insert 220 is made of a cylindrical shape to be fitted to the cutting blade 300 and in the center can be easily replaced and used, characterized in that the female screw 221 is formed to fasten the fastening bolt 211. Safe mowers.
The method of claim 1,

The elastic spring 400 is made of a "U" shape of the two sides facing each other open to the outside, the elastic engaging jaw to be caught with the end of the cutting blade 300 to rotate on either side of the opposite sides facing each other 410 is formed,

Between the seating surface 230 and the fixed block 420 fixed to the rotating plate 200 at a predetermined interval, the lower portion of the “U” shape of the elastic spring 400 is fitted in contact with the seating surface 230. Easily replaceable and safe mowers, characterized in that the fastening does not fall by fastening the mounting block (430).
The method of claim 1,

The elastic spring 400 is formed in a "U" shape of the two sides facing each other outwards, the opposite sides of each of the end of the cutting blade 300 and the rotating portion of the cutting blade 300, respectively Elastic locking step (410, 410 ') is formed so that the rim,

Between the seating surface 230 and the fixed block 420 fixed to the rotating plate 200 at a predetermined interval, the lower portion of the “U” shape of the elastic spring 400 is fitted in contact with the seating surface 230. Fasten the mounting block 430 so that it does not fall out,

When the cutting blade 300 is accommodated on the rotating plate 200, the long edge of the rotating end is caught on one elastic locking jaw 410, or the edge of the rotating central portion is different elastic locking jaw (410 ') Easy to use and safe mowing machine, characterized in that the short blade is made to hang on, it is used to replace each other.