KR102419734B1 - Extension type farm working machinery - Google Patents

Abstract

The present invention relates to an agricultural working machine which is mounted to transmit power to an agricultural tractor. A gearbox driven by receiving the power of the tractor is installed at the center of the agricultural working machine, a knife axis rotated by the gearbox is installed on both sides of the gearbox, and a back plate covering the knife axis is installed on both sides of the gearbox of an upper portion of the knife axis.

Description

Extension type farm working machinery

The present invention relates to an expandable agricultural work machine, and more particularly, to an expandable agricultural work machine which is connected to an agricultural tractor and towed according to the performance of the agricultural tractor to expand the working area.

BACKGROUND ART In general, a rotavator, which is one of agricultural work machines, is an agricultural machine used to till the land for sowing or transplanting crops.

That is, the rotavator is mounted on an agricultural tractor, which is an agricultural work vehicle, and rotates a number of tilling blades provided on a knife shaft receiving power from the tractor's engine, so that the farmland can be cultivated to an appropriate depth so that crops can be seeded or transplanted. will be.

Such a rotovator has been proposed in the Republic of Korea Registered Utility Model No. 20-0492282 (hereinafter referred to as 'prior art literature').

The conventional rotavator disclosed in the prior art document has a main body in which a power transmission unit to which the power of the tractor is transmitted is provided in the upper central region, both ends of which are closed with respective side plates, and both sides of the power transmission unit and both side plates respectively installed between the side plates. A support frame, a gear coupling shaft provided rotatably through a side plate on the left side through a support frame, that is, a left support frame, with the other end connected to one end of the power transmission unit, and fixed to the left end of the gear coupling shaft A gearbox consisting of a first sprocket wheel rotated in a state of being rotated and a second sprocket wheel connected to a chain while being coupled and fixed to the knife shaft is configured.

At this time, a plurality of tillage blades are installed in a fixed state to the knife shaft, and the farmland is tilled to an appropriate depth while being rotated by the knife shaft.

That is, when the power of the tractor is transmitted to the power transmission unit, its power is transmitted to the gear coupling shaft connected to the power transmission unit to rotate the gear coupling shaft in the support frame, and the first sprocket wheel coupled and fixed to the gear coupling shaft is The second sprocket wheel connected to the chain is rotated as it rotates along with the gear coupling shaft, and as the knife shaft is rotated by the rotation of the second sprocket wheel, a plurality of tillage blades till the farmland.

However, since the conventional rotavator is provided with a blade shaft of a certain length according to the standard, the rotavator towed by the agricultural tractor always tills farmland of a certain width regardless of the performance of the tractor, so the working width is limited. There is a disadvantage in that workability is inefficient compared to the performance of the tractor.

Republic of Korea Registered Utility Model No. 20-0492282

Therefore, the present invention has been devised to solve the problems of the prior art as described above, and by configuring the length of the agricultural work machine to be variable or expandable according to the performance of the agricultural tractor, the work area is expanded according to the performance of the agricultural tractor It aims to provide an expandable agricultural work machine that can be

Expandable agricultural work machine according to the present invention for achieving the above object, as an agricultural work machine mounted so as to transmit power to the agricultural tractor, the center of the agricultural work machine is provided with a gearbox driven by receiving the power of the tractor, the gearbox Both sides of the knife shaft is provided with a gearbox rotated by the gearbox, both sides of the gearbox on the top of the knife shaft is characterized by an agricultural work machine provided with a back plate to cover the knife shaft.

And, the back plate may be provided to be adjusted in length according to the length of the knife shaft on both sides of the gearbox.

In addition, both sides of the gearbox are provided with main shafts rotated by the gearbox, and both main shafts may be provided to rotate integrally by coupling the knife shafts to shape fit.

In addition, while being provided to protrude on both main shafts, a lock nut is fastened to the end penetrating the knife shaft coupled to the main shaft, and a distance fixing means for coupling and fixing the knife shaft to the main shaft may be provided.

In addition, the back plate includes a center back plate provided to protrude on both sides of the gearbox, and a side back plate that is movably coupled from both sides of the center back plate, and may be provided to cover the knife shaft.

In addition, the center back plate is provided with mounting frames protruding from both sides of the gearbox, and the side back plate is provided with a sliding frame coupled to and from the mounting frame, so that the side back plate can be withdrawn and retracted from the center back plate.

According to the expandable agricultural work machine of the present invention, according to the performance of the agricultural tractor, by extending the length of the agricultural work machine towed by being connected to the agricultural tractor to expand the working width of the work machine, the working area of the farmland according to the performance of the agricultural tractor is expanded according to the performance of the agricultural tractor. There is an effect that an efficient operation can be made.

1 is a view of a normal state of a rotavator exemplified as an example of an agricultural work machine according to the present invention.
FIG. 2 is a view showing a cloak blade mounted on the rotavator of FIG. 1 .
3 is a view of the rotavator according to the present invention in an expanded state.
FIG. 4 is a view showing FIG. 3 from another direction.
FIG. 5 is an exploded view illustrating the rotavator of FIG. 3 .
6 is a side configuration diagram showing a centrally driven rotovator according to the present invention.
7 is an exploded view of the gearbox and the mounting box configured in the rotavator according to the present invention.
8 is a view showing a shock absorber configured between the rotavator and the mounting box according to the present invention.

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

The terms used in the present invention are terms defined in consideration of the functions in the present invention, which may vary depending on the intention or custom of the user or operator, so the definitions of these terms correspond to the technical matters of the present invention and should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are merely exemplary matters of the constituent elements presented in the claims of the present invention, and are included in the technical spirit throughout the specification of the present invention and the scope of the claims. It is an embodiment including a substitutable component as an equivalent in the component.

In addition, optional terms in the examples below are used to distinguish one component from other components, and the components are not limited by the terms.

Accordingly, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

1 to 8 are views showing a centrally driven rotavator and a variable structure of the rotavator as an example of an agricultural work machine according to the present invention.

As shown in the drawing, the agricultural work machine according to the present invention is connected and mounted to the rear of the agricultural tractor so as to transmit power.

Here, the agricultural work machine includes a harvester, a rotavator, a plow, a planter, a mower, a cover machine, a trailer, a baler, a compost spreader, and the like, but in this embodiment, the rotavator 100 is illustrated as an example of an agricultural work machine as shown in the drawing. to explain

And, the agricultural work vehicle to which the rotavator 100 is mounted will be described by taking the agricultural tractor as an example.

On the other hand, as shown in Figs. 1 to 5, the rotavator 100 as described above is connected to the detachable part 200 mounted on the rear of the tractor and provided.

As shown in Figs. 3 to 5, the rotavator 100 is integrally provided with a gearbox 110 driven by receiving the power of the tractor in its central portion, and the rotor based on this gearbox 110 The baiter 100 is balanced on the left and right sides.

In particular, a main shaft 111 is provided to protrude from both sides of the gearbox 110 in the lower portion of the gearbox 110, and a hollow knife shaft 190 is coupled to both main shafts 111 in a shape-fitting manner. It is provided non-rotatably, and is provided with a back plate whose length is adjusted according to the length of the knife shaft 190 protruding from the main shaft 111 on the upper portion of the gear box 110 , and the back plate includes a center back plate 150 and a side back plate 160 . ), including

First, the hollow knife shaft 190 is slide-moved in a state coupled to the main shaft 111 in a polygonal shape fit to adjust the width of both knife shafts 190 protruding from the main shaft 111. For this purpose, a hollow The knife shaft 190 of the main shaft 111 is provided with a width adjusting means that can adjust the width of the knife shaft 190 protruding from the main shaft 111, and a fixing means for fixing the knife shaft 190 adjusted by the width adjusting means.

At this time, the width adjusting means may be configured in an automated structure by a hydraulic cylinder (not shown) provided in the hollow knife shaft 190, or may be configured in a manual structure by an operator.

In addition, the fixing means may be composed of a fixing pin (not shown) penetrating the hollow knife shaft 190 and the main shaft 111, and these fixing pins may be used alone, but a computerized bolt 116 to be described later. ) and the lock nut 117 is preferably used as it can minimize the load of the fixing part due to the load.

That is, at the outer end of the knife shaft 190, the lock nut 117 is fastened to the computerized bolt 116, and on the inside of the knife shaft 190, the fixing pin penetrates the knife shaft 190 and the main shaft 111. As a result, the knife shaft 190 can be firmly fixed to the main shaft 111 and provided.

In addition, as described above, the knife shaft 190 protruded from the main shaft 111 and provided to be adjusted in width is preferably provided in an overlapping state of 40% or more with the main shaft 111, and in this area, the knife shaft 190 is used to cover or Since it is possible to eliminate the gap that may be generated between the knife shaft 190 and the main shaft 111 during rotary work such as tillage, it is possible to perform the work stably.

On the other hand, in order to adjust the length of the back plate along the knife shaft 190 whose length is adjusted as described above, a hollow mounting frame 113 is provided on the upper portion of the gearbox 110 to protrude from both sides, and the mounting frame 113 has A center back plate 150 that covers and covers the main shaft 111 drawn from the gearbox 110 is coupled and provided.

In addition, the side back plate 160 is coupled to both sides of the center back plate 150 , and the side back plate 160 is provided with a sliding frame 161 coupled to and from the mounting frame 113 .

As a result, the side back plate 160 is provided to be drawn out from both sides of the center back plate 150 by the sliding frame 161 and the mounting frame 113 and expanded or retracted and reduced, so that the length of the rotavator 100 is variable. This allows you to adjust the working width.

It is preferable that the center back plate 150 and the side back plate 160 are provided with fixing means capable of fixing the side back plate 160 that enters and exits from the center back plate 150 .

In addition, at the rear end of the center back plate 150 as described above, a central door leaf 170 extending toward the ground to cover and cover the gear box 110 is rotatably provided, and the rear end of the side back plate 160 also faces the ground. The extended side door leaf 180 is rotatably provided.

In particular, the side door leaf 180 is provided so as to be able to enter and exit from both sides of the central door leaf 170 so that the overall length of the door leaf can be changed by adjusting the length like the upper center back plate 150 and the side back board 160. Also, the length adjustment of the side door leaf 180 coming in and out of the central door leaf 170 can be made in the same structure as the upper center back board 150 and the side back board 160 .

On the other hand, the gearbox 110 at the upper portion of the mounting frame 113 is provided with a power transmission unit 120 connected to the power transmission unit of the detachable unit 200 to input the power of the tractor, and the power transmission unit 120 is The power transmission unit of the detachable unit 200 may be coupled as a dog clutch structure to transmit power.

And, as shown in FIG. 6 , the power transmission unit 120 has an input shaft 121 protruding toward the detachable part 200 of the tractor, and a dog clutch is fixed to the tip of the protruding input shaft 121 . A first sprocket wheel 124 is connected to the rear end of the input shaft 121 to enable power transmission.

The first sprocket wheel 124 is connected to the second sprocket wheel 112 of the main shaft 111 to be described later via the chain 125 to enable power transmission.

In addition, the main shaft 111 is provided in the lower portion of the gear box 110 to protrude to both sides of the gear box (110). A distance fixing means, that is, a computerized bolt 116, is provided to protrude from the outer ends of both the main shafts 111, and a second sprocket wheel 112 is fixedly provided to the inner end of the main shaft 111, so that the second sprocket wheel 112 and the main shaft 111 are provided to rotate at the same time.

Accordingly, the power of the tractor is input to the input shaft 121 through the power transmission unit 120, and the input power is the main shaft ( 111) and output.

Both of these main shafts 111 are provided with the knife shaft 190 coupled in a relatively non-rotatable state, respectively.

At this time, the knife shaft 190 is formed of a hollow pipe and fitted to the outside of the main shaft 111, the main shaft 111 is formed in a polygonal shape on its outer surface, and the knife shaft 190 has its inner surface as the main shaft 111 ) is formed in a polygonal shape corresponding to the outer surface and is coupled to fit the shape, the main shaft 111 and the knife shaft 190 are coupled in a structure in which relative rotation is impossible.

On the other hand, the knife shaft 190 provided on the main shaft 111 as described above can be replaced with a knife shaft of a different standard depending on the performance of the tractor, and when the performance of the tractor is high output, the length of the rotavator 100 is extended by The working width can be extended, and when the performance of the tractor is low output, it may be provided to reduce the working width by reducing the length of the rotavator 100 . As an example, in this embodiment, when the performance of the tractor is high output, the case is provided with a knife shaft 190 having a tillage blade 191 as in FIG. 5, and when the performance of the tractor is low output, in FIG. It exemplified a case in which the knife axis 190 having a cloaktonal 192 is provided as shown.

This replacement of the knife shaft 190 is implemented through the computer bolt 116, which is a distance fixing means provided on the main shaft 111, when the knife shaft 190 is fitted to the outside of the main shaft 111 in a shape fit and coupled to the main shaft (111) is provided so as to protrude from the outer end of the knife shaft 190, the knife shaft 190 by fastening the lock nut 117 to the machine bolt 116 protruding from the knife shaft 190, the main axis (111) is coupled and fixed.

At this time, the lock nut 117 is provided with a plurality of nuts that are sequentially fastened to the computerized bolt 116, so that loosening thereof can be firmly prevented.

On the other hand, the gear box 110 as described above is mounted on the detachable part 200 by the mounting box 130 and is provided to be detachably provided, the mounting box 130 is hinged to the upper portion of the mounting frame 113 and provided. do.

Such a mounting box 130 is hinge-coupled to the front and rear hinge portions of the gearbox 110, respectively, and the front hinge portion of the gearbox 110 is configured at the front end of the input shaft 121, and the gearbox 110 of the rear hinge portion is configured at the rear end of the mounting frame 113 .

In particular, the front hinge portion of the gearbox 110 includes a hinge bushing 123 coupled to the front end of the input shaft 121 to be rotatably coupled to the front end of the input shaft 121 via a bearing 122, and the outer surface of the hinge bushing 123 is described later. The front hinge plate 131 of the mounting box 130 to be fitted is hinged.

And, the rear hinge portion of the gearbox 110 includes a plurality of hinge plates 114 formed on the upper surface of the rear end of the mounting frame 113, and the hinge plate 114 has a coupling hole 114a of the hole in a triangular shape. It is provided to be spaced apart. A rear hinge plate 132 of the mounting box 130 to be described later is sandwiched between the plurality of hinge plates 114 and is hinge-coupled.

Therefore, the rotavator 100 is rotated left and right up and down based on the front and rear hinges of the mounting box 130 to be described later coupled and fixed to the detachable part 200, and the rotor is rotated by rolling. The baiter 100 can always till the farmland in a horizontally maintained state regardless of the smoothness of the farmland.

In addition, as the gearbox 110 is provided in the central part of the rotavator 100 , uncultivated land that is not cultivated as much as the width of the gearbox 110 exists in farmland under the gearbox 110 .

Accordingly, the lower surface of the gearbox 110 is provided with a plow protrusion 115 protruding downward as shown in FIGS. 6 and 7 , and the plow protrusion 115 digs an uncultivated area corresponding to the width of the gearbox 110 . will vomit

In particular, during the tillage operation of the rotavator 100, the lower part of the center of the rotavator 100, that is, the lower part of the gearbox 110, by the tillage operation of the tillage blade 191 rotated on both sides of the gearbox 110. The soil in the farmland is accumulated, and the plow protrusion 115 disperses the accumulated soil and at the same time removes weeds in the uncultivated land.

On the other hand, as shown in the figure, the mounting box 130 is hingedly provided on the upper portion of the gearbox 110 as described above.

As shown in FIGS. 6 and 7 , the mounting box 130 includes a cover part 130a that covers and covers the upper surface of the gearbox 110 , that is, the power transmission part 120 , and the detachable part 200 of the tractor and It includes a “∧”-shaped extension 130b extending downward from one end of the adjacent cover portion 130a.

Mounting pins 133 (133) ( 134) is provided.

Among these mounting pins, the upper mounting pin 133 is fixed to the upper surface of the cover part 130a, the upper hook of the detachable part 200 is coupled, and the lower mounting pin 134 is the lower end of both extension parts 130b. It is formed to be fixed to the lower hook of the detachable part 200 is coupled.

At this time, the upper and lower hooks coupled to the upper and lower mounting pins 133 and 134 are provided so that their openings face each other, and are coupled to the upper and lower mounting pins 133 and 134 to be attached to the detachable part 200. It is possible to firmly mount the rotavator 100 .

In addition, the cover portion 130a of the mounting box 130 is provided with front and rear hinge portions hingedly coupled to the front and rear hinge portions of the gearbox 110 .

The front hinge portion of the mounting box 130 includes a front hinge plate 131 protruding downward from the front end of the lower surface of the cover portion 130a, and the front hinge plate 131 has a hinge bushing 123 of the input shaft 121. A through hole 131a through which the through hole is coupled is formed.

Accordingly, the hinge bushing 123 coupled through the through hole 131a of the front hinge plate 131 is provided to rotate (rotate) in place in the front hinge plate 131 . At this time, the front hinge plate 131 may be provided as a front coupling plate and a rear pipe portion, in this case the front coupling plate is coupled to the outer portion of the bearing interposed between the input shaft 121 and the hinge bushing 123 . It may be fixed, and the tube portion at the rear may be provided by being fitted on the outer surface of the hinge bushing 123 .

In addition, the rear hinge portion of the mounting box 130 includes a rear hinge plate 132 protruding downward from the rear end of the lower surface of the cover portion 130a, and the rear hinge plate 132 has one stop hole 132a and The plurality of long holes 132b are formed in a triangular shape.

In particular, the stop hole 132a is formed in the upper portion of the rear hinge plate 132 , and the plurality of long holes 132b are formed to be spaced apart from each other in the same line at the lower portion of the rear hinge plate 132 , and are vertically elongated at the same time.

The coupling pins are respectively coupled to both long holes 132b of the rear hinge plate 132, and the coupling pins pass through the long holes 132b and are formed as a bottom coupling hole in the hinge plate 114 of the gearbox 110 ( It is provided to be coupled through 114a). Accordingly, the gearbox 110, that is, the rotavator 100 is provided to be rolled up and down by the vertical length of the long hole 132b in the mounting box 130, and the rolling rotavator 100 is always maintained horizontally with respect to the farmland. be able to

In addition, a coupling pin is selectively coupled to the stop hole 132a of the rear hinge plate 132 . This coupling pin also penetrates through the stop hole 132a and is coupled through the upper coupling hole 114a formed as a hole in the hinge plate 114 of the gearbox 110 to fix the rotovator 100 to the mounting box 130 . to block rolling. In this way, in the state in which the rolling of the rotavator 100 is blocked, the tractor can be safely moved.

On the other hand, between the mounting box 130 and the rotavator 100 as described above, a plurality of shock absorbers 140 for buffering the rolling of the rotavator 100 are provided on both sides, respectively.

As shown in FIG. 8, the shock absorber 140 includes a cylinder body 140a to which hydraulic pressure acts therein, and a rod 140b provided to enter and exit from one end of the cylinder body 140a.

The lower end of the cylinder body 140a is hinged to the lower end of the extension 130b of the mounting box 130, and the rod 140b that enters and exits from the upper end of the cylinder body 140a has its front end (upper end) of the gearbox. (110) is hinged to the mounting frame (113).

Therefore, when both ends of the rotavator 100 are rolled up and down in the mounting box 130, the rods 140b on both sides that are rolled up and down like the rotavator 100 are buffered while entering and leaving each cylinder body 140a. it will work

On the other hand, in this embodiment, in constituting the shock absorber 140, the cylinder body 140a is positioned downward, coupled to the lower end of the extension portion 130b of the mounting box 130, and the rod 140b is positioned upward. It exemplifies a structure coupled to the mounting frame 113 of the gearbox 110, which is a cylinder body (with a rod 140b) for preventing damage to the rod 140b by foreign substances splashing upward during tillage work of farmland. It is located on the upper portion of the 140a), it is possible to prevent the malfunction of the shock absorber 140 as the damage to the rod (140b) is prevented.

In addition, on the rear surface of the extension portion 130b of the mounting box 130 (the surface facing the rotavator 100), the shock absorber 140 during tillage work by the rotavator 100 blocks foreign substances from splashing toward the A guard 141 to protect the shock absorber 140 is provided.

At this time, the guard 141 is not only formed of a plate having an area sufficient to cover the rear surface of the shock absorber 140 , but also may be inclined to correspond to the inclination of the shock absorber 140 . In this way, when the guard 141 is provided inclined to correspond to the shock absorber 140, the area that can cover the shock absorber 140 is secured to the maximum compared to the same area, so that the shock absorber 140 can be protected more safely. there will be

As described above, the central driving type rotavator 100 according to the present invention receives the power of the tractor through the power transmission unit 1200 coupled with the power transmission unit of the tractor.

As shown in FIG. 6 , the transmitted power is input to the input shaft 121 of the power transmission unit 120 configured on the upper portion of the gearbox 110 , and the input power is the first sprocket wheel connected to the input shaft 121 ( 124) is transmitted to the second sprocket wheel 112, and the power transmitted to the second sprocket wheel 112 is output through the main shaft 111 provided on both sides of the second sprocket wheel 112, respectively.

In this way, the power output to the main shaft 111 rotates the main shaft 111, and as the knife shaft 190 coupled thereto is rotated by the rotation of the main shaft 111, a tiller blade 191 or a cover blade ( 192) to cultivate farmland.

In particular, such a tilling blade 191 or a plowing blade 192 can be selectively connected to the main shaft 111 according to the performance of the tractor and mounted. ) of the knife shaft 190 having a low-power tractor, as shown in FIG. 2, the knife shaft 190 having a cloaking blade 192 is coupled to the main shaft 111 in a shape-fitting manner, and then the outer end of the knife shaft 190 is formed. The lock nut 117 is fastened to the computerized bolt 116 protruding by

At this time, when the main shaft 111 is provided with a knife shaft 190 having a tiller blade 191, the length of both sides is increased, so as in FIGS. When the side back plate 160 is drawn out to both sides and spread, and the main shaft 111 is provided with a knife shaft 190 having a cloak blade 192, the length of both sides is relatively short, so the center back plate 150 as shown in FIG. 1 ) and fold the side back plate 160 to the side.

Accordingly, by adjusting the length of the center back plate 150 and the side back plate 160 according to the standard of the knife shaft 190 provided on the main shaft 111, it is possible to prevent the soil from scattering upward during tillage.

On the other hand, since the rotavator 100 as described above is provided with a gearbox 110 in the center thereof, the left and right sides are always operated in a state in which the left and right sides are always horizontal around the gearbox 110, so that the farmland can be cultivated evenly. do.

In addition, the rotavator 100 is a gearbox 110 provided therein by being rolled up and down by the length of the long hole 132b in the fixed mounting box 130 attached to the detachable part 200 of the tractor. Regardless of the level of smoothness of the farmland, it is possible to cultivate the farmland in a state that is always maintained horizontally.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It is clear that the modification or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims.

100: rotovator 110: gearbox
111: main shaft 112: second sprocket wheel
113: mounting frame 114: hinge plate
114a: coupling hole 115: plow protrusion
116: computerized bolt 117: lock nut
120: power transmission unit 121: input shaft
122: bearing 123: hinge bushing
124: first sprocket wheel 125: chain
130: mounting box 130a: cover part
130b: extension 131: front hinge plate
131a: through hole 132: rear hinge plate
132a: stop hole 132b: long hole
133,134: mounting pin 140: shock absorber
140a: cylinder body 140b: rod
141: guard 150: center back
160: side back 170: central door
180: side door 190: knife axis
191: tillage day 192: potting day
200: detachable part

Claims (8)

As an agricultural work machine mounted so as to transmit power to an agricultural tractor,
The agricultural work machine is provided with a gearbox driven by receiving the power of the tractor in its central part, and the front and rear portions of the mounting box connected to the agricultural tractor are hinged, respectively, so that the work machine is rolled left and right based on the hinge The main shaft rotated by the gearbox is provided on both sides of the gearbox, and the hollow knife shaft is coupled to be moved in a shape-fitting manner and is provided to rotate integrally, and the main shaft has a computerized bolt protruding through the knife shaft is provided, the computerized bolt is provided with a lock nut fastened and fixed from the outside of the knife shaft, and a fixing pin that is fastened through the main shaft and the knife shaft to fix the knife shaft to the main shaft is provided, and both sides of the gear box above the knife shaft cover the knife shaft Agricultural work machine equipped with a back plate.
The method according to claim 1,
The back plate is an agricultural work machine provided along the length of the knife shaft on both sides of the gearbox.
The method according to claim 1,
An agricultural work machine provided with a plow protrusion protruding downward at the lower part of the gearbox.
The method according to claim 1,
An agricultural work machine provided with a shock absorber for buffering the rolling agricultural work machine between the agricultural work machine and the mounting box.
The method according to claim 1,
Agricultural working machine provided in a state where the knife shaft coupled to the main shaft by shape matching is overlapped with the main shaft by 40% or more.
delete The method according to claim 1,
The back plate includes a center back plate provided to protrude on both sides of the gearbox, and a side back plate that is movably coupled from both sides of the center back plate, and is provided to cover and cover the knife shaft.
8. The method of claim 7,
The center back plate is provided with a mounting frame protruding from both sides of the gearbox, and the side back plate is provided with a sliding frame coupled to and from the mounting frame, so that the side back plate can be drawn out and retracted from the center back plate.

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