WO2023128296A1

WO2023128296A1 - Centrally-driven agricultural machine

Info

Publication number: WO2023128296A1
Application number: PCT/KR2022/018752
Authority: WO
Inventors: 김중호
Original assignee: 대호 (주)
Priority date: 2021-12-29
Filing date: 2022-11-24
Publication date: 2023-07-06
Also published as: KR102419737B1

Abstract

The present invention relates to a centrally-driven agricultural machine, and provides an agricultural machine, which is an agricultural machine mounted on an agricultural tractor in a manner allowing power transfer, wherein the agricultural machine has, in a middle thereof, a gearbox which is driven by receiving power from the tractor, the gearbox has, on both sides thereof, main shafts which are rotated by the gearbox, and each of the two main shafts has a blade shaft coupled thereto in a manner that does not allow relative rotation.

Description

Agricultural work machine of central drive type

The present invention relates to a centrally driven agricultural working machine, and more particularly, to a centrally driven agricultural working machine in which a gearbox for driving the working machine by receiving power from an agricultural tractor is configured in the central part of the working machine.

In general, a Rotavator, one of agricultural working machines, is an agricultural machine used for cultivating land for sowing or transplanting crops.

That is, the rotavator is mounted on a farm tractor, which is an agricultural work vehicle, so that a plurality of tillage blades provided on a knife shaft receiving power from the engine of the tractor are rotated to plow the farmland to an appropriate depth so that crops can be sowed or transplanted. will be.

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

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

At this time, a plurality of tillage blades are installed in a coupled and fixed state on the shear shaft, so as to be rotated by the shear shaft, the farmland is plowed to an appropriate depth.

That is, when the power of the tractor is transmitted to the power transmission unit, the 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 As the gear coupling shaft rotates, the second sprocket wheel connected by the chain rotates, and as the knife shaft rotates by the rotation of the second sprocket wheel, a plurality of tillage blades plow the farmland.

However, in the conventional rotavator, since the power transmission means for transmitting the power of the tractor to the knife shaft, that is, the gearbox, is configured only on the left side of the rotavator, the left side with the gearbox is relatively heavier than the right side of the rotavator. Due to this imbalance of weight, the rotavator tilts to the left, which makes it difficult to maintain a horizontal, i.e. equilibrium, disadvantage.

In this way, if the equilibrium of the rotavator is not maintained, since the farmland is plowed with the tiller blade tilted, the tillage depth of the farmland is changed and there is a secondary disadvantage in that the farmland cannot be evenly tilled.

(patent literature)

Korean Utility Model Registration No. 20-0492282

Therefore, the present invention has been made to solve the problems of the prior art as described above, and a gearbox for driving a working machine by receiving power from a farm tractor is configured in the center of the working machine to balance the working machine based on the gearbox. Its purpose is to provide an agricultural work machine of a central drive type that can be maintained.

The agricultural working machine of the central drive type according to the present invention for achieving the above object is an agricultural working machine mounted to be able to transmit power to a farm tractor, and the agricultural working machine is provided with a gearbox driven by receiving power from the tractor in the center thereof. And, on both sides of the gearbox, main shafts rotated by the gearbox are provided, and both main shafts are characterized by an agricultural working machine provided with a knife shaft coupled to each other non-rotatably.

Specifically, the knife shaft may be formed as a hollow square tube, and the main shaft may be inserted into the inside of the knife shaft to be coupled in a shape fit to prevent relative rotation.

In addition, the hollow blade shaft may be provided with a width control means for adjusting the width of the blade shaft protruding from the main shaft and a fixing unit for fixing the blade shaft adjusted by the width control unit, and the blade shaft coupled to the main shaft in a shape-fitting manner may be provided. and may be provided in an overlapping state of 40% or more.

In addition, the main shaft or the knife shaft or both shafts may be provided with a lug bar that removes weeds while rotating like the shaft to prevent weeds from being entangled in the shaft.

In addition, the lug bars are provided on both sides of the gearbox, and the lug bars on both sides of the gearbox may be provided in a symmetrical position of 180 degrees. The weeds to be wound may be provided by being moved to a side away from the gearbox.

In addition, both sides of the gear box above the main shaft and the knife shaft may be provided with back plates that cover the main shaft and the knife shaft by adjusting the length according to the length of the knife shaft.

In addition, the back plate may include a center plate protruding from both sides of the gearbox and side plates movably coupled to both sides of the center plate to cover and cover the drive shaft and the knife shaft.

In addition, the center plate is provided with a mounting frame protruding from both sides of the gear box, and the side plate is provided with a sliding frame that is coupled to enter and exit from the mounting frame, so that the side plate can be drawn in and out of the center plate.

According to the agricultural working machine of the central drive type of the present invention, a gearbox for driving the working machine by receiving the power of the tractor is configured in the center of the agricultural working machine mounted at the rear of the agricultural tractor, so that the weight of both sides of the working machine based on the gearbox is reduced. Since it becomes the same, there is an effect of maintaining the equilibrium of the work machine.

In addition, according to the present invention, the knife shaft formed in the shape of a hollow polygonal pipe is coupled to the main shaft drawn out on both sides of the gearbox in a shape fit, so that the length of the knife shaft provided on both sides of the gearbox can be varied, and the blade shaft Even when expanding, there is an effect of minimizing the weight of the knife shaft.

1 is a separation diagram between a rotavator and a detachable unit exemplified as an example of an agricultural working machine according to the present invention.

FIG. 2 is an exploded view of FIG. 1 viewed from another direction.

Figure 3 is an exploded view of the rotavator according to the present invention.

4 is a front configuration diagram of a rotavator according to the present invention.

5 is a view of a state in which a knife shaft having a bokto blade is provided in a rotavator according to the present invention.

6 is a view showing a bokto blade mounted on the rotavator of FIG. 5;

7 is a side configuration diagram showing a central drive type rotavator according to the present invention.

Figure 8 is a separation view of the gearbox and the mounting box constituted in the rotavator according to the present invention.

9 is a view showing a shock absorber configured between a rotavator and a 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 functions in the present invention, which may vary according to the intention or custom of the user or operator, so the definitions of these terms are meanings consistent with the technical details 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 only exemplary of the components presented in the claims of the present invention, are included in the technical spirit throughout the specification of the present invention, and cover the scope of the claims. It is an embodiment including components that can be replaced as equivalents in components.

In addition, optional terms in the following embodiments are used to distinguish one element from other elements, and elements are not limited by the terms.

Therefore, 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 9 are views showing a central drive type rotor bater and a blade shaft mounted on the rotor bator as an example of an agricultural working machine according to the present invention.

As shown in the drawings, the agricultural working machine according to the present invention is mounted to be connected to the rear of the agricultural tractor to enable transmission of power.

Here, the agricultural work machine includes a harvester, a rotavator, a plow, a seeder, a mower, a soil cover machine, a trailer, a baler, a compost spreader, etc. Let's explain.

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

On the other hand, as shown in Figs. 1 to 6, the rotavator 100 as described above is provided connected to the detachable part 200 mounted on the rear of the tractor.

As shown in FIGS. 1 to 6, the rotavator 100 is integrally equipped with a gearbox 110 driven by receiving the power of the tractor at its center, and the rotor based on the gearbox 110. The batter 100 is balanced on both the left and right sides.

As shown in FIG. 6, a main shaft 111 is provided to protrude from both sides of the gearbox 110 at the bottom of both sides of the gearbox 110, and the main shaft 111 is the gearbox 110 As it rotates, power is output.

In addition, a distance fixing means, that is, a computational bolt 116 is protruded from the outer ends of both 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 The wheel 112 and the main shaft 111 are provided to rotate simultaneously.

As a result, 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.

The shear shafts 190 are coupled to both main shafts 111 in a non-rotatable state, respectively, so that the shear shafts 190 on both sides are rotated together with the main shaft 111 to plow farmland.

At this time, the shear shaft 190 is formed as a hollow square tube and is fitted to the outside of the main shaft 111, but the main shaft 111 has an outer surface formed in a polygonal shape, and the inner surface of the shear shaft 190 is the main shaft ( 111) is formed in a polygonal shape corresponding to the outer surface and coupled in a shape-fitting manner, the main shaft 111 and the knife shaft 190 are coupled in a structure in which relative rotation is impossible.

In particular, the hollow knife shaft 190 slides while being coupled to the main shaft 111 to adjust the width of both knife shafts 190 protruding from the main shaft 111. To this end, the hollow knife shaft 190 has A width adjusting means capable of adjusting the width of the cutting shaft 190 protruding from the main shaft 111 and a fixing means for fixing the cutting shaft 190 adjusted by the width adjusting means are provided.

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

In addition, the fixing means may be composed of a hollow knife shaft 190 and a fixing pin (not shown) penetrating the main shaft 111, and such a fixing pin may be provided alone and used, but a computational bolt 116 to be described later ) and the lock nut 117, it is preferable to minimize the load applied to the fixing part by the load.

That is, at the outer end of the knife shaft 190, the lock nut 117 is fastened to the shear bolt 116, and on the inside of the knife shaft 190, the fixing pin is fastened while penetrating 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, it is preferable that the cutting shaft 190 protruding from the main shaft 111 and provided to adjust the width is provided in a state of overlapping with the main shaft 111 by 40% or more. Since it is possible to eliminate the gap that may occur between the knife shaft 190 and the main shaft 111 during rotary work such as tillage, the work can be performed stably.

The shear shaft 190 may be provided with a tiller blade 191 on its entire outer surface to perform plowing work, or a circular soil cover blade 192 may be provided at the outer end of the shear shaft 190 to perform soil cover work. there is.

However, plowing work or soil covering work has been performed only by a rotavator equipped with a knife shaft having a corresponding blade. It is possible to perform several functions with one rotavator 100 by allowing the blade shaft 190 to be easily replaced and mounted.

That is, in the present invention, the knife shaft 190 provided on the main shaft 111 of the rotavator 100 is provided so that it can be replaced with a knife shaft of a different standard according to the performance and work purpose of the tractor.

In particular, when the performance of the tractor is high power, the working width can be extended by extending the length of the rotavator 100, and when the performance of the tractor is low power, the working width can be reduced by reducing the length of the rotavator 100. may be provided. As an example, in this embodiment, when the performance of the tractor is high power, the case where the blade shaft 190 having a tiller blade 191 is provided as shown in FIG. 3 is illustrated, and when the performance of the tractor is low power, in FIG. A case in which the knife shaft 190 having the blade 192 is provided is exemplified as shown in FIG.

Such replacement of the knife shaft 190 is implemented through the computerized bolt 116 provided on the main shaft 111, when the knife shaft 190 is fitted to the outside of the main shaft 111 in a shape-fitting manner, the main shaft 111 The sheath bolt 116 is provided to protrude to the outer end of the shear shaft 190, and the shear shaft 190 is connected to the main shaft 111 by fastening the lock nut 117 to the sheath bolt 116 protruding from the shear shaft 190. bond is fixed.

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

Therefore, it is possible to easily replace and mount various knife shafts 190 to the main shaft 111 of the rotavator 100 by the bolt 116 and the lock nut 117 as described above.

In addition, as shown in FIG. 4, the main shaft 111 or the knife shaft 190 or the main shaft 111 and the knife shaft 190 provided as described above remove weeds from the tilled soil while rotating like a shaft to remove weeds. A lug bar 119 is provided to block winding on the shaft.

The lug bar 119 is provided in the axial direction between the shaft and the tiller blade 191 to remove weeds not removed by the tiller blade 191, thereby preventing weeds from being wound around the shaft in advance.

In addition, although the lug bar 119 is illustrated as being provided only to the main shaft 111 as an example in FIG. 4 of this embodiment, it should be noted that it may be provided to the main shaft 111 as well as the knife shaft 190.

In particular, when the lug bar 119 is provided on the main shaft 111, as shown in FIG. 4, among the bearings 118 provided between the gearbox 110 and the main shaft 111, it rotates like the main shaft 111. A tiller blade 191 may be fixed to the inner ring, and a lug bar 119 may be formed to protrude in the axial direction on the tiller blade 191, and the lug bar 119 thus provided is (110) to prevent weeds from being wound around the output end of the gearbox (110) and the main shaft (111).

Meanwhile, the lug bars 119 as described above are provided on both sides of the gear box 110, and the lug bars 119 on both sides of the gear box 110 are provided symmetrically by 180 degrees to each other. In this way, if the lug bars 119 on both sides of the gearbox 110 are provided symmetrically by 180 degrees, the balance can be maintained during rotation of the main shaft 111, and when the balance of the main shaft 111 is maintained, vibration and operation The generation of noise can be reduced.

In addition, the lug bar 119 is provided with an inclination downward (or may appear inclined upward depending on the position of the lug bar 119) from the side of the gearbox 110 to the outer surface of the knife shaft 191, so that the lug bar 119 ) so that the weeds wound around the lug bar 119 are moved to the side of the knife shaft 191 spaced apart from the gearbox 110 and provided.

Thus, even if the weeds removed by the lug bar 119 are wound around the lug bar 119, it is possible to prevent the weeds from becoming entangled by being wound around the output end of the gearbox 110 or the main shaft 111. .

On both sides of the upper part of the gear box 110 as described above, a back plate whose length is adjusted according to the length of the knife shaft 190 provided according to the performance of the tractor is provided, and the back plate includes a center back plate 150 and a side back plate 160. It is provided by

To adjust the length of the back plate, a hollow mounting frame 113 is provided on the top of the gearbox 110 to protrude to both sides, and the mounting frame 113 has a main shaft 111 drawn out from the gearbox 110 to be described later. ) The center top plate 150 covering and covering is provided in combination.

In addition, side back plates 160 are coupled to both sides of the center back plate 150, and sliding frames 161 coupled to and from the mounting frame 113 are provided on the side back plates 160.

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

It is preferable that fixing means capable of fixing the side deck 160 coming in and out from the center deck 150 are provided on the center deck 150 and the side deck 160 .

In addition, at the rear end of the center back plate 150 as described above, a central door 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 extends toward the ground. The extending side door leaf 180 is rotatably provided.

In particular, the side doors 180 are provided to be able to enter and exit from both sides of the central door 170, so that the overall length of the door can be adjusted and varied like the center deck 150 and the side deck 160 at the top. In addition, the length of the side doors 180 coming in and out from the central door 170 can be made in the same structure as the upper center deck 150 and the side deck 160.

In addition, the gearbox 110 on the upper part of the mounting frame 113 is provided with a power transmission unit 120 connected to the power transmission unit of the detachable part 200 and inputting power of the tractor, and the power transmission unit 120 It may be coupled to the power transmission unit of the detachable unit 200 as a dog clutch structure to transmit power.

And, as shown in FIG. 7 in the power transmission unit 120, the input shaft 121 is provided to protrude toward the detachable unit 200 of the tractor, and the dog clutch is fixed to the front end of the protruding input shaft 121. , and 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 a chain 125 to enable power transmission.

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

Such a mounting box 130 is hinged to the front and rear hinge parts of the gearbox 110, respectively, and the front hinge part of the gearbox 110 is configured at the front end of the input shaft 121, and the gearbox 110 The rear hinge portion of is composed of the rear end of the mounting frame (113).

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

In addition, 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 pair of holes 114a forming a triangle It is provided to be spaced apart in the state. Between the plurality of hinge plates 114, a rear hinge plate 132 of the mounting box 130, which will be described later, is inserted and hinged.

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

In addition, as the gearbox 110 is provided at the center of the rotavator 100, uncultivated land W that is not cultivated as much as the width of the gearbox 110 exists in the farmland below the gearbox 110.

Accordingly, the lower surface of the gearbox 110 is provided with a plow protrusion 115 protruding downward as shown in FIGS. ) will be excavated.

In particular, during the plowing operation of the rotavator 100, the lower center of the rotavator 100, that is, the lower part of the gearbox 110, by the plowing operation of the tiller blades 191 rotated on both sides of the gearbox 110 The soil of the farmland is accumulated, and the plow protrusion 115 disperses the accumulated soil and at the same time removes weeds from the uncultivated land (W).

On the other hand, as shown in the drawing above the gear box 110 as described above, the mounting box 130 is hinged and provided.

As shown in FIGS. 7 and 8, the mounting box 130 includes a cover part 130a covering the upper surface of the gearbox 110, that is, the power transmission part 120, and the detachable part 200 of the tractor. A “∧” shaped extension 130b extending downward from one end of the adjacent cover 130a is included.

As shown in FIG. 5, the cover part 130a and the extension part 130b are provided with mounting

pins

133 and 134 to which the hooks of the upper and lower links of the detachable part 200 are respectively hooked and coupled. do.

Among these mounting pins, the upper mounting pin 133 is formed to be fixed to the upper surface of the cover part 130a and 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 hook and the lower hook 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, thereby attaching to the detachable part 200. It is possible to firmly mount the rotavator 100.

In addition, front and rear hinge parts hinged to the front and rear hinge parts of the gearbox 110 are provided on the cover part 130a of the mounting box 130 .

The front hinge part of the mounting box 130 includes a front hinge plate 131 protruding downward from the front end of the lower surface of the cover part 130a, and the hinge bushing 123 of the input shaft 121 is included in the front hinge plate 131 Through-holes 131a through which this penetration is coupled are formed.

Thus, the hinge bushing 123 penetrated and coupled to 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 with a front coupling plate and a rear pipe portion, and 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 rear pipe may be provided by being inserted into the outer surface of the hinge bushing 123.

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

In particular, the stop hole 132a is formed on the upper part of the rear hinge plate 132, and the plurality of long holes 132b are formed at the lower part of the rear hinge plate 132 to be spaced apart on the same line and vertically long.

The coupling pins are coupled to both long holes 132b of the rear hinge plate 132, respectively, and the coupling pins pass through the long holes 132b and the lower coupling hole formed as a regular hole in the hinge plate 114 of the gearbox 110 ( 114a) is provided to be through-coupled. Thus, the gearbox 110, that is, the rotavator 100 is provided to be rolled up and down as much as the vertical length of the long hole 132b in the mounting box 130, and the rotavator 100 to be rolled will always remain horizontal to farmland. be able to

In addition, a coupling pin is selectively coupled to the stop hole 132a of the rear hinge plate 132. The coupling pin is also penetrated into the upper coupling hole 114a formed as a regular hole in the hinge plate 114 of the gearbox 110 while passing through the stop hole 132a, thereby fixing the rotator 100 to the mounting box 130 This will block rolling. In this way, in a state in which rolling of the rotavator 100 is blocked, the tractor can be safely moved.

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

As shown in FIG. 9, 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 part 130b of the mounting box 130, and the rod 140b coming in and out from the upper end of the cylinder body 140a has its front end (upper end) gearbox It is hinged to the mounting frame 113 of (110).

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 roll up and down like the rotavator 100 move in and out of each cylinder body 140a to provide a buffer. it works

On the other hand, in this embodiment, in constructing the shock absorber 140, the cylinder body 140a is positioned lower and coupled to the lower end of the extension 130b of the mounting box 130, and the rod 140b is positioned upward and illustrated a structure coupled to the mounting frame 113 of the gearbox 110, which is a cylinder body ( 140a), and as damage to the rod 140b is prevented, malfunction of the shock absorber 140 can be prevented.

In addition to this, the rear surface of the extension part 130b of the mounting box 130 (the surface facing the rotator 100) blocks foreign matter bouncing toward the shock absorber 140 during plowing work by the rotator 100 to prevent foreign matter from A guard 141 protecting 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 may also be inclined to correspond to the inclination of the shock absorber 140. In this way, when the guard 141 is inclined to correspond to the shock absorber 140, the maximum area for covering the shock absorber 140 compared to the same area is secured, so the shock absorber 140 can be more safely protected. there will be

Rotavator 100 of the central drive type according to the present invention as described above 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. 7, the transmitted power is input to the input shaft 121 of the power transmission unit 120 configured on the upper part 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 main shafts 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 the rotation of the main shaft 111 rotates the knife shaft 190 coupled non-rotatably in a polygonal shaft structure together with the rotation of the main shaft 111 The farmland is plowed by the tiller blade 191 or the bokto blade 192.

In particular, such a tiller blade 191 or a tiller blade 192 can be selectively mounted on the main shaft 111 according to the performance of the tractor. In the case of a high-powered tractor, the tiller blade 191 In the case of a low-powered tractor, the cutting shaft 190 having a blade 192 is coupled to the main shaft 111 in a shape-fitting manner as shown in FIG. Fasten the lock nut 117 to the protruding bolt 116 to fix it.

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 becomes longer, so in the center top plate 150 of the upper part of the gearbox 110 as shown in FIGS. When the side back plate 160 is drawn out and spread to both sides, and the main shaft 111 is provided with the knife shaft 190 having the blade 192, the length of both sides is relatively short, so as shown in FIG. 5, the center back plate 150 ) and fold the side back panel 160 into the side.

Thus, by adjusting the lengths of the center back plate 150 and the side back plate 160 according to the standard of the shear shaft 190 provided on the main shaft 111, it is possible to prevent soil from scattering upward during plowing.

On the other hand, since the gearbox 110 is provided in the center of the rotavator 100 as described above, it is operated in a state where both left and right sides are always kept horizontal around the gearbox 110, so that farmland can be plowed evenly. do.

In addition, the rotavator 100 is rolled up and down by the length of the long hole 132b in the mounting box 130, in which the gearbox 110 provided therein is attached to the detachable part 200 of the tractor, thereby increasing the rotator 100 Regardless of the smoothness of the farmland, it can always be cultivated in a state that is kept level with the farmland.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible.

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

(Description of code)

100: Rotavator 110: Gearbox

111: main shaft 112: second sprocket wheel

113: mounting frame 114: hinge plate

114a: coupling hole 115: plow protrusion

116: electric bolt 117: lock nut

118: bearing 119: lug bar

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 plate 170: central door

180: side door 190: knife shaft

191: tillage day 192: soil recovery day

200: detachable part

Claims

As an agricultural work machine mounted to be able to transmit power to a farm tractor,

The agricultural work machine is provided with a gearbox driven by receiving the power of the tractor in its center, and a main shaft rotated by the gearbox is provided on both sides of the gearbox, and both main shafts are formed as hollow square tubes to match the main shaft. An agricultural working machine provided with a knife shaft that is non-rotatably coupled to the.
The method of claim 1,

An agricultural working machine having a width adjusting means for adjusting the width of the cutting shaft protruding from the main shaft and a fixing means for fixing the cutting shaft adjusted by the width adjusting means on the hollow shearing shaft.
The method of claim 1,

An agricultural working machine in which the blade shaft coupled to the main shaft by shape fit is provided in a state of overlapping with the main shaft by 40% or more.
The method of claim 1,

An agricultural working machine provided with a lug bar that removes weeds while rotating together with the shaft to prevent entanglement of weeds on the main shaft, knife shaft, or both shafts.
The method of claim 4,

A lug bar is provided on both sides of the gear box, and the lug bar on both sides of the gear box is provided in a symmetrical position of 180 degrees.
The method of claim 4,

The lug bar is installed inclined from the gear box side to the outer surface of the shaft, and the weeds wound on the lug bar are moved to the far side from the gear box.
The method of claim 1,

An agricultural working machine provided with a back plate on both sides of the gearbox above the main shaft and the shear shaft, the length of which is adjusted according to the length of the shear shaft to cover the main shaft and the shear shaft.