KR102386411B1 - Mowing device with fine adjustment of blade gap - Google Patents

Abstract

Disclosed is a mowing device capable of fine-tuning the blade. The mowing device according to an embodiment of the present invention is fixed with a base portion fixed to the mounting frame at the lower end of the mowing unit, and a plurality of fixed blades attached and fixed to one side of the base portion and spaced apart from each other at regular intervals along the first direction. A movable blade portion having a plurality of movable blades disposed corresponding to each of the blades and the fixed blades, which are disposed to move relative to the left and right along the first direction on the fixed blade portion, at least a portion of which overlaps with the fixed blades; It is installed between the drive shaft and the movable blade part to convert the rotational motion of the input shaft into a linear motion and includes a power transmission part provided to the movable blade part, and two or more long holes are formed in the base part and are fastened to the mounting frame through each long hole The base part is attached and fixed to the mounting frame through a fixing bolt, and the first direction distance between the movable blade and the fixed blade can be adjusted by adjusting the position of the base part in the first direction based on the fixing bolt within the range allowed by the long hole. What is constituted is the gist of it.

Description

Mowing device with fine adjustment of blade gap

The present invention relates to a mowing device installed in a combine, and more particularly, to a mowing device capable of fine-tuning the blade that can finely adjust the distance between the two blades (fixed blade and movable blade) in the mowing direction.

An agricultural vehicle that continuously performs a series of processes of cutting crops while driving, sorting and separating grains and gumbul from the cut crops, and temporarily storing the selected grains is called a combine. The combine is usually composed of a mowing unit, a threshing unit, a straw discharge unit, and a grain tank, and is divided into a self-harvesting type combine and a normal type combine in terms of structure and function.

The self-threshing combine is a type of combine that threshes the harvested crops by putting only the ears into the threshing unit while transporting them parallel to the central axis of the threshing trough. It is a type of combine that threshes by putting the stems and ears of crops mowed through the mowing unit at the same time in the threshing unit.

As described in a number of known technologies, including Japanese Patent Application Laid-Open No. 2010-239980 and Japanese Patent Application Laid-Open No. 2014-193115, the normal combine combine mowers for cutting upright crops and threshing in which substantial threshing of mowing crops is made. A device, and a feeder (Feeder) for transferring the grain mowed through the harvesting unit to the threshing device.

The feeder is installed across the mowing unit and the threshing device and has a transport chain for transporting crops, and the transport chain is surrounded by a feeder case that connects the harvesting unit in front of the traveling body and the threshing device of the traveling body in communication. . The feeder is driven by power extracted from the power output by the engine and driving the threshing apparatus, and the harvesting unit is linked with the feeder.

As disclosed in Korean Patent Application Laid-Open No. 2007-0003535, etc., the mowing device applied to the mowing part in the normal combine is a bariquant type mowing device with opposite operating directions along the lateral width direction of the mowing part. It is arranged facing in a line, and is configured so that the harvesting operation is performed by the sliding direction relative motion of the two blades constituting the harvesting device.

The two blades are composed of a fixed blade and a movable blade. The movable blade is closely arranged above the fixed blade and moves left and right within the specified stroke range. At this time, the blade constituting the movable blade reciprocates between two adjacent blades among the blades constituting the fixed blade, and the cutting is realized because of the shear force generated at the moment when the blade of the movable blade intersects the blade of the fixed blade.

The horizontal distance between the blade of the fixed blade and the blade of the movable blade has a great influence on the mowing performance. For example, if the central position of the blade constituting the movable blade in the neutral position deviates even a little from the central position of the blade constituting the fixed blade, the cutting is defective in any one of the left and right directions based on the movement of the movable blade. This is bound to happen.

Therefore, if the center of the two blades is slightly shifted from the neutral position due to prolonged use, the cutting (mowing) performance is restored by re-adjusting the horizontal position of the movable blade. It is configured to adjust the horizontal position of the movable blade by adjusting the rotational spline engagement position of the mutually splined parts.

That is, in the prior art, when the rotation direction coupling position of the part where the movable blade side and the driving shaft are splined is adjusted, the movable blade moves in the horizontal direction by a stroke corresponding to the adjustment amount to adjust the distance from the fixed blade. There is a problem that the horizontal position of the movable blade cannot be more finely adjusted because the interval between the tooth and the tooth is fixed.

Japanese Patent No. 5731280 (Registration Date: 2015.04.17) Japanese Patent No. 5330781 (Registration Date 2013.08.02)

The problem to be solved by the present invention is to provide a mowing device capable of finely adjusting the blade of a configuration that can finely adjust the horizontal direction (the direction in which the movable blade moves with respect to the fixed blade) between the fixed blade and the movable blade .

According to an embodiment of the present invention as a means of solving the problem,

A base portion fixed to the mounting frame at the bottom of the cutting unit;

a fixed blade part attached and fixed to one side of the base part and having a plurality of fixed blades spaced apart from each other at regular intervals along a first direction;

a movable blade part disposed to move relative to the left and right along the first direction on the stationary blade part, and having a plurality of movable blades provided corresponding to each of the stationary blades so that at least a part of the stationary blade overlaps;

a power transmission unit installed between the input shaft performing a rotational motion and the movable blade part, and converting the rotational motion of the input shaft into a linear motion to provide the movable blade part;

Two or more long holes are formed in the base part, and the base part is attached and fixed to the mounting frame through fixing bolts that pass through each long hole and are fastened to the mounting frame,

It provides a mowing device capable of fine-tuning the blade that can adjust the first direction interval between the movable blade and the fixed blade by adjusting the position of the base part in the first direction based on the fixing bolt within the range allowed by the long hole.

Here, the base portion may be configured to include a first base frame attached and fixed to the mounting frame and having the long hole, and a second base frame connected at right angles to the first base frame and fixed with the fixed blade portion.

And the fixed blade portion, a fixed piece fixed to one side of the base portion with a bolt, a fixed blade having a slot for accommodating the movable blade oscillating in a first direction, and a downward connecting the fixed blade and the fixed piece It is composed of a convex arcuate connecting piece, and may have a configuration in which a breakaway sill is formed at a boundary between the arcuate connecting piece and the fixed blade.

At this time, the separation prevention block may be coupled to one lower surface of the movable blade so that one side portion is in contact with the separation prevention sill.

In addition, the mowing device according to the present invention is installed at regular intervals along the first direction on the base part, and the movable blade part is pressed toward the fixed blade part with respect to the third direction perpendicular to the first direction so that the movable blade part can be in close contact. It may further include; an elastic pressing portion for elastically pressing the blade portion.

In addition, it is disposed at one end of the base portion, by adjusting the position of the base portion in the first direction with respect to the mounting frame to adjust the first direction distance between the movable blade and the fixed blade; can do.

Preferably, the position control unit may be of a configuration including a control plate attached to one side of the base portion and having a fastening hole, and a blade adjustment bolt screwed to the fastening hole and penetrating a support plate of one side of the mounting frame.

In addition, the power transmission unit applied to the present invention includes a drive shaft provided to rotate in a forward/reverse direction within a predetermined angular range according to the rotational motion of the input shaft, and one end of the link connection part of the movable blade part has a hinge structure. The connected movable link may be configured by a swinging arm having one end concentrically coupled to one end of the drive shaft and the other end connected to the other side of the movable link by a hinge structure.

According to an embodiment of the present invention, when the movable blade part moves relative to the fixed blade part, lifting of the movable blade part is suppressed by the elastic pressing part, and the separation prevention block formed on the fixed blade part and the separation prevention block coupled to the movable blade part are suppressed. By preventing the front departure of the movable blade by the movable blade, the mowing operation can be stably implemented without lifting the movable blade or departing forward.

Moreover, when the play of the power transmission unit or the blade is worn by driving for a long time, the first direction interval between the movable blade and the fixed blade can be finely adjusted by adjusting the position of the base unit in the first direction within the allowable range. In other words, it is possible to precisely readjust the gap between the blades according to the clearance of the power transmission unit or the degree of blade wear, thereby clearly preventing the resulting cutting defects.

1 is a perspective view showing the overall configuration of a mowing device capable of fine adjustment according to an embodiment of the present invention.
Figure 2 is an enlarged view of the main part of the present invention showing an enlarged portion 'A' of Figure 1;
Figure 3 is a perspective view of the main part of the harvesting device shown in Figure 2 viewed from the bottom.
Figure 4 is a cross-sectional view of the mowing device shown in Figure 2 in the I-I direction.
5 is an enlarged bottom view of part 'B' of FIG. 2;
Figure 6 is an operating state diagram of the harvesting device according to an embodiment of the present invention.

A preferred embodiment of the present invention will be described in detail.

Terms used in the specification are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and includes one or more other features or It should be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof does not preclude the possibility of addition.

Also, terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

In addition, terms such as “…unit”, “…unit”, “…module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can

In the description with reference to the accompanying drawings, the same reference numerals will be assigned to the same components for the same components, and overlapping descriptions thereof will be omitted. In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Before describing the present invention, direction-related terms to be used later will be defined as follows.

Among the directional terms used hereafter, the first direction is the longitudinal direction of the movable blade part and the stationary blade part, and indicates a direction in which the movable blade part moves left and right within a predetermined stroke range with respect to the stationary blade part, and the second direction is the same plane as the first direction. It is a direction orthogonal to the first direction in the image, and the third direction is defined as a direction perpendicular to a plane defined by arbitrary axes of the first direction and the second direction.

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

1 is a perspective view showing the overall configuration of a mowing device capable of fine adjustment according to an embodiment of the present invention, Figure 2 is an enlarged view of the main part of the present invention showing an enlarged portion 'A' of FIG. And Figure 3 is a perspective view seen from the bottom of the main part of the mowing device shown in Fig. 2, Figure 4 is a cross-sectional view of the mowing device shown in Fig.

1 to 4, the mowing apparatus according to an embodiment of the present invention is largely composed of a base portion 10, a fixed blade portion 20 and a movable blade portion 30 and a power transmission portion 40. The base part 10 is attached and fixed to the mounting frame (6, see FIG. 3) at the bottom of the harvesting unit disposed in front of the traveling body of the normal combine, and the fixed blade part 20 is attached and fixed to one side of the base part 10 do. And the movable blade part 30 is disposed on the fixed blade part 20 .

The movable blade part 30 is arranged to move relative to the left and right along the first direction with respect to the fixed blade part 20 so that the blade constituting the movable blade part 30 (hereinafter referred to as 'movable blade 36') is fixed. The mowing operation is implemented by the shear force generated at the moment it intersects with the blade (hereinafter, referred to as 'fixed blade 26') constituting the blade unit 20, and the power transmission unit 40 includes the input shaft 50 constituting it. Converts the rotational motion of the linear motion into a linear motion and provides it to the movable blade unit 30 .

The base part 10 is attached and fixed to the mounting frame 6 at the bottom of the cutting part, not shown, as mentioned above. As shown in FIG. 2, the base portion 10 has two or more plurality of long holes 13 that are spaced apart from each other at uniform or non-uniform intervals in the first direction, and the mounting frame 6 passes through these long holes 13. ) through the fixing bolts (B) fastened to the base portion 10 can be attached to and fixed to the mounting frame (6).

The base portion 10 may preferably be configured with a first base frame 12 and a second base frame 14 . The first base frame 12 is a part attached and fixed to the mounting frame, and has two or more of the plurality of long holes 13 , and the second base frame 14 is connected to the first base frame 12 at a right angle. and provides a mounting surface 140 to which the fixed blade 20 is attached and fixed.

A desired position in the first direction of the base portion 10 with respect to the fixing bolt B in the permitted range (the range permitted by the long hole 13) by forming the long hole 13 in the first base frame 12 It can be adjusted as much as possible, and accordingly, the first between the movable blade 36 and the fixed blade 26 according to the clearance or wear state of the blade (the fixed blade 26 and the movable blade 36) or the power transmission unit 40. The cutting (mowing) force can be easily readjusted by finely adjusting the direction spacing.

As shown in the drawing (FIG. 4), the fixed blade part 20 may be firmly attached to and fixed to the second base frame 14 through a binding means such as a bolt-nut, and may be fixed at regular intervals along the first direction. and a plurality of the fixed blades 26 that are spaced apart from each other. In this case, the fixed blade 26 may be configured as a finger type extending long in the second direction as illustrated in the drawings.

As specifically shown in FIG. 4 , the fixed blade 20 includes a fixed piece 22 , which is a part fixed to the second base frame 14 by a binding means such as a bolt-nut, and a movable blade 36 . and a plurality of fixed blades 26 having slots 260 for accommodating them oscillating in one direction. In addition, a downward convex arcuate connecting piece 24 connecting the fixed blade 26 and the fixed piece 22 is provided.

The boundary between the arcuate connecting piece 24 and the fixed blade 26 constituting the fixed blade 20 may be configured to have a step difference at a predetermined height. Accordingly, the departure preventing sill 25 is formed at a predetermined height in the boundary portion, and the departure preventing block 38 is coupled to one lower surface of the movable blade 36 so that one side portion is in contact with the departure preventing sill 25 , thereby yipping. Deviation in the second direction of the movable blade part 30 with respect to the fixed blade part 20 may be prevented during operation.

The movable blade part 30 is disposed on the stationary blade part 20 to make a relative movement from side to side in the first direction with respect to the stationary blade part 20 . The movable blade unit 30 includes a plurality of movable blades 36 provided to correspond to each of the fixed blades 26 so that at least a part thereof overlaps the fixed blades 26 . At this time, the movable blade 36 may have a triangular plane shape and continuous along the first direction, and may have a configuration in which sharp blades are formed on each of the left and right edge sides.

The power transmission unit 40 is installed between the input shaft 50 which rotates in one direction with the engine output and the movable blade part 30, and appropriately converts the power provided by the input shaft 50 to the movable blade part 30 ) is provided in More specifically, it functions to convert the rotational force of the input shaft 50 , which rotates in one direction with the engine output, into linear motion, and provides it to the movable blade unit 30 .

Specifically, the power transmission unit 40 includes a drive shaft 42 provided to rotate in a forward/reverse direction within a predetermined angular range according to the rotational movement of the input shaft 50 , and a link connection part on one side of the movable blade unit 30 . One end of the movable link (46) connected to the hinge structure (32), one end is concentrically coupled to one end of the drive shaft (42), and the other end is a hinge structure on the other side of the movable link (46). It may include a rocking arm 44 connected to.

Here, the two shafts may be connected by a cam structure, for example, an oscillation cam 48 (see FIG. see magnified view).

According to this configuration, with the rotation of the input shaft 50 rotating in one direction, the driving shaft 42 makes reciprocating angular motions in clockwise and counterclockwise directions, and the driving shaft 42 is rotated by the reciprocating angular motion of the driving shaft 42 . The swinging arm 44 connected to the swinging arm 44 and the movable link 46 connected to the swinging arm 44 in a hinge structure swing left and right in the first direction, so that the movable blade part 30 with respect to the fixed blade part 20 is moved in the first direction. You will be able to move left and right.

In FIGS. 3 and 4 , reference numeral 16 denotes an elastic pressing part 16 installed on the base part 10 . The elastic pressing part 16 may be installed on the base part 10 at regular intervals along the first direction, and move the movable blade part 30 toward the fixed blade part 20 with respect to a third direction perpendicular to the first direction. It functions to be pressed and adhered. Due to this, lifting of the movable blade part 30 is suppressed, and smooth cutting performance can be exhibited.

The elastic pressing unit 16 is, as illustrated in FIGS. 3 and 4 , the base unit 10 , specifically, a rivet or bolt fixed to the upper surface of the second base frame 14 - a fixed end fixed by a nut method. 160 and the fixed end 160 extending from the fixed end 160 toward the movable blade portion 30 and the extended end is in close contact with the upper surface of the movable blade portion 30 to press the movable blade portion 30 in the third direction. It may be composed of an elastic piece 162 on a curved upward curve.

On the other hand, Figure 5 is an enlarged view of another main part of the mowing device capable of fine-tuning the blade according to an embodiment of the present invention, and is an enlarged bottom view of part 'B' of FIG. 2 .

As shown in Figure 5, the cutting device capable of fine-tuning the blade according to an embodiment of the present invention is also arranged at one end of the above-described base portion 10, the base portion (6) with respect to the mounting frame (6) 10) by adjusting the position in the first direction to include a position adjusting unit 18 provided to adjust the distance between the movable blade 36 and the fixed blade 26 in the first direction.

The position control unit 18 is preferably attached to one side of the base unit 10 and includes a control plate 180 having a fastening hole, and a support plate 60 screwed to the fastening hole and mounted on one side of the mounting frame 6 . It consists of a penetrating blade adjustment bolt 182, and rotates the blade adjustment bolt 182 clockwise or counterclockwise in the state in which the above-described fixing bolt (B) is released, between the movable blade 36 and the fixed blade 26 . It may be configured to adjust the interval in the first direction.

That is, in accordance with the rotational movement of the blade adjustment bolt 182, the adjustment plate 180 screwed thereto makes a linear motion in the first direction to move the base portion 10, and thus the base portion 10 is attached and fixed to the base portion 10. The first direction position of the movable blade part 30 may be configured to be freely adjustable within the range allowed by the aforementioned long hole 13 . Of course, this is one preferred embodiment and is not particularly limited thereto.

It is sufficient as long as it is a configuration capable of adjusting the position of the movable blade part 30 in the first direction by moving the base part 10 in the first direction, so that the known structure having a mechanism for moving the base part 10 in the first direction is sufficient. It should be noted that any type of mechanism or mechanical structure or configuration may be substituted, and therefore, such modifications may also be included in the scope of the present invention.

Hereinafter, we will briefly look at the operation of the harvesting device according to an embodiment of the present invention.

Figure 6 is an operational state diagram of the mowing device according to an embodiment of the present invention, Figure 6 (a) is a state in which the movable blade part 30 is slidingly operated in the first direction according to the rotational force transmitted from the input shaft 50 6 (b) is a moving blade 36 and the fixed blade 26 when the clearance or the blade (the fixed blade 26 and the movable blade 36) of the power transmission unit 40 is worn. It is a view showing the operation state of the position adjusting unit 18 for adjusting the interval in the first direction between.

Referring to FIG. 6 and previously attached FIG. 1 together, the drive shaft 42 is connected to the input shaft 50 rotating in one direction with the engine output by the aforementioned cam (oscillation cam 48). Accordingly, with the rotation of the input shaft 50, which rotates in one direction, the driving shaft 42 makes reciprocating angular motions in clockwise and counterclockwise directions within a predetermined angular range.

According to the reciprocating angular motion of the driving shaft 42, the other end of the swinging arm 44 connected to the driving shaft 42 swings in the first direction, and is connected to the other end of the swinging arm 44 that swings in a hinge structure. As the movable link 46 swings left and right with respect to the first direction, the movable blade part 30 performs a relative movement from side to side in a predetermined range along the first direction with respect to the fixed blade part 20 .

Accordingly, the movable blade 36 constituting the movable blade unit 30 reciprocates between the two adjacent fixed blades 26 among the fixed blades 26 constituting the fixed blade unit 20, and the movable blade 36 The cutting of the root of the crop that has entered between the two adjacent fixed blades 26 is implemented according to the forward movement of the gas due to the shear force generated at the moment it intersects the fixed blade 26 .

In the relative movement of the movable blade part 30 with respect to the fixed blade part 20, the lifting of the movable blade part 30 is suppressed by the above-mentioned elastic pressing part 16, and the separation preventing protrusion formed on the fixed blade part 20 ( 25) and the forward departure of the movable blade 30 is prevented by the separation prevention block 38 coupled to the movable blade 36, so that the movable blade 30 is not lifted or separated forward and the mowing operation is stably implemented. can

On the other hand, when the play of the power transmission unit 40 or the blade (the fixed blade 26 and the movable blade 36) is worn for a long period of time, the mowing device according to the embodiment of the present invention is in the permitted range (long hole 13). ) by adjusting the position of the base portion 10 in the first direction based on the fixing bolt (B) within the range allowed by This can prevent cutting defects.

More specifically, when the gap between the two blades needs to be adjusted due to abrasion or abrasion of the power transmission unit 40, the above-described fixing bolts (B) (refer to FIG. 2) are slightly loosened and the mounting frame (6) In a state in which the base portion 10 can move in the first direction with respect to the fixed blade ( 26) and the movable blade 36 can be easily readjusted.

According to the embodiment of the present invention as described above, when the movable blade part moves relative to the fixed blade part, the lifting of the movable blade part is suppressed by the elastic pressing part, and the separation protrusion formed in the stationary blade part and the detachment coupled to the movable blade part are separated. By preventing the forward departure of the movable blade part by the prevention block, the mowing operation can be stably implemented without lifting the movable blade part or departing forward.

Moreover, when the play of the power transmission unit or the blade is worn by driving for a long time, the first direction interval between the movable blade and the fixed blade can be finely adjusted by adjusting the position of the base unit in the first direction within the allowable range. In other words, it is possible to precisely readjust the gap between the blades according to the clearance of the power transmission unit or the degree of blade wear, thereby clearly preventing the resulting cutting defects.

In the above detailed description of the present invention, only specific embodiments thereof have been described. However, it is to be understood that the present invention is not limited to the particular form recited in the detailed description, but rather, it is to be understood to cover all modifications and equivalents and substitutions falling within the spirit and scope of the present invention as defined by the appended claims. should be

6: mounting frame 10: base part
12: first base frame 13: long hole
14: second base frame 16: elastic pressing part
18: position adjustment unit 20: fixed blade unit
22: fixed piece 24: connecting piece
25: departure bump 26: fixed blade
30: movable blade part 32: link connection part
36: movable blade 38: escape prevention block
40: power transmission unit 42: drive shaft
44: rocking arm 46: movable link
48: rocking cam 50: input shaft
60: support plate 140: mounting surface
160: fixed end 162: elastic piece
180: adjustment plate 182: blade adjustment bolt
260: slot B: fixing bolt

Claims (8)

A base portion fixed to the mounting frame at the bottom of the cutting unit;
a fixed blade portion attached and fixed to one side of the base portion and having a plurality of fixed blades spaced apart from each other at regular intervals along a first direction;
a movable blade portion disposed to move relative to the left and right along the first direction on the fixed blade portion and having a plurality of movable blades provided corresponding to each of the fixed blades so that at least a portion overlaps the fixed blade;
a power transmission unit that is mechanically connected to the engine and installed between the movable blade part and the input shaft which rotates in one direction by the engine output, converts the rotational motion of the input shaft into a linear motion and provides the rotational motion to the movable blade part; and
A position adjusting part disposed at one end of the base part and provided to adjust the first direction distance between the movable blade and the fixed blade by adjusting the position of the base part in the first direction with respect to the mounting frame;
Two or more long holes are formed in the base part, and the base part is attached to and fixed to the mounting frame through fixing bolts that pass through each long hole and are fastened to the mounting frame,
A cutting device capable of fine-tuning the blade that can adjust the first direction interval between the movable blade and the fixed blade by adjusting the position of the base part in the first direction based on the fixing bolt within the range allowed by the long hole.
The method of claim 1,
The base part,
A first base frame attached and fixed to the mounting frame and having the long hole formed therein;
The first base frame and connected at right angles, and a cutting device capable of fine-tuning the blade consisting of a second base frame to which the fixed blade part is attached and fixed.
The method of claim 1,
The fixed blade portion,
A fixing piece fixed to one side of the base with a bolt;
a fixed blade having a slot for accommodating the movable blade to be swingable in a first direction;
It consists of a downward convex arcuate connecting piece connecting the fixed blade and the fixed piece,
A mowing device capable of fine-tuning the blade with a departure preventing sill formed at the boundary between the arcuate connection piece and the fixed blade.
4. The method of claim 3,
A cutting device capable of fine-tuning the blade in which the separation prevention block is coupled to the lower surface of one side of the movable blade so that one side portion is in contact with the departure prevention sill.
The method of claim 1,
The base part is installed at regular intervals along the first direction, and elastically pressurizes the movable blade part so that the movable blade part is pressed toward the fixed blade part in a third direction perpendicular to the first direction to be in close contact with the movable blade part. A mowing device capable of fine-tuning the blade further comprising a part.
delete The method of claim 1,
The position control unit,
a control plate attached to one side of the base and having a fastening hole;
A mowing device that is screwed into the fastening hole and can fine-tune a blade including a blade adjustment bolt penetrating the support plate of one side of the mounting frame.
The method of claim 1,
The power transmission unit,
A drive shaft provided to rotate in a forward/reverse direction within a predetermined angular range according to the rotational motion of the input shaft;
a movable link having one end connected to the link connection part of one side of the movable blade in a hinge structure;
One end concentrically coupled to one end of the drive shaft and the other end is a cutting device capable of fine-tuning the blade consisting of a swinging arm connected to the other side of the movable link by a hinge structure.

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