KR102457287B1 - Apparatus for spraying granule for tractor mounting - Google Patents

Abstract

One embodiment of the present invention provides a granule spraying device for tractor mounting easy to control the spraying of granules. Here, the tractor-mounted granular spraying device includes a base frame unit, a housing unit, a storage unit, a blade unit, and a first power unit. The base frame portion is coupled to the rear frame of the tractor. The housing part is coupled to the base frame part, has an opening opened rearward, and an inlet hole is formed in the upper part. The storage unit is provided at the upper portion of the housing unit, and the granules supplied to the inside of the housing unit through the inlet hole are stored. The blade part is rotatably provided on the inside of the housing part, and sprays the granules supplied through the inlet hole to the rear through the opening. The first power unit is provided under the housing unit and rotates the blade unit.

Description

Granule spraying device for tractor mounting {APPARATUS FOR SPRAYING GRANULE FOR TRACTOR MOUNTING}

The present invention relates to a tractor-mounted granular spraying device, and more particularly, to a tractor-mounted granular spraying device for easy granular spraying control.

In the past, farmers not only consumed a lot of time and manpower by spraying pesticides directly on crops grown in paddy fields or fields, but also caused problems in that the amount of pesticides used was not appropriate, rather damaging crops or soil.

Therefore, in recent years, a method of connecting a pesticide sprayer to an agricultural machine such as a tractor or a tiller and driving the pesticide spreader using the power of the agricultural machine to spray the pesticide is preferred. The pesticide sprayer connected to the agricultural machine can carry a large amount of pesticide because it uses the power of the agricultural machine, and it also has the advantage of maintaining a wide spraying area of the pesticide and the advantage of spraying the pesticide without effort. There is this.

As an example, briefly explaining the farming method using a tractor, the sowing equipment performs sowing at the rear of the rotary equipment while performing the plowing work using the rotary equipment mounted on the moving tractor, and pesticides from the rear of the sowing equipment The sprayer sprays pesticides. Since liquid pesticides can cause poisoning accidents through the respiratory tract of workers, recently, granules (粒劑), which are pesticides in the form of small grains, have been widely used.

However, the conventional pesticide spraying device cannot spray the granules to be scattered over a wide area, and there is a problem in that it is difficult to control the amount of spraying and the spraying time of the granules.

Republic of Korea Patent Publication No. 1940600 (2019.04.10. Announcement)

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a tractor-mounted granular spraying device for easy spraying control of granules.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above technical problem, an embodiment of the present invention is a base frame portion coupled to the rear frame of the tractor; a housing portion coupled to the base frame portion, having an opening opened rearward, and having an inlet hole formed thereon; a storage unit provided at an upper portion of the housing unit and storing granules supplied to the inside of the housing unit through the inlet hole; a blade unit rotatably provided on the inside of the housing unit and spraying the granules supplied through the inlet hole rearward through the opening; a first power unit provided under the housing unit and rotating the blade unit; And it is provided in the housing portion, and a spreading angle control unit for adjusting the range of the spraying angle of the granules to be sprayed in the opening; including, the spreading angle control unit is provided in a pair of the housing portion, both ends of the opening A guide plate that is rotatable about a support pin provided in each, a guide plate having a guide piece on one surface, a lever movable in a horizontal direction on the guide plate, a lever having a protruding pin formed to protrude, and the support pin A plurality of locking slits formed at regular intervals along the circumferential direction of the housing part as a center and having a width corresponding to the thickness of the lever into which one end of the lever can be inserted, and both ends of the guide piece of the guide plate And it is supported by the protruding pin of the lever, it provides a tractor mounting granular spray device, characterized in that it has a first elastic member for elastically supporting the lever in the locking slit direction.

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In an embodiment of the present invention, an opening/closing amount having a shutter provided in the housing unit to be movable in a horizontal direction to adjust an opening/closing amount of the inlet hole, and a second power unit provided in the housing unit and moving the shutter It may include a control unit.

In an embodiment of the present invention, it is provided adjacent to the inlet hole in the inner lower end of the storage unit, it may include a stirring unit that receives power from the first power unit and stirs the granules while rotating.

In an embodiment of the present invention, an extension frame coupled to the base frame portion and extending downwardly, a rotation frame hingedly connected to a lower end of the extension frame, and rotatably provided at a lower end of the rotation frame and of a tractor Auxiliary rotation unit having a rotating wheel that is rotated in contact with the ground during movement; a sensing unit provided on the rotating wheel and rotating together with the rotating wheel, and a sensor provided on the rotating frame and configured to sense the sensing unit; And it may include a control unit that receives a signal from the sensor and controls the operation of the first power unit.

In an embodiment of the present invention, the control unit may control the time at which the granules are sprayed by the blade unit by setting the operation and maintenance time of the first power unit from an arbitrary rotation point of the rotating wheel.

In an embodiment of the present invention, the auxiliary rotating part may have a second elastic member having one end connected to the extension frame and the other end connected to the rotating frame to provide an elastic restoring force so that the rotating frame rotates downward. .

In an embodiment of the present invention, the auxiliary rotating unit is provided on the upper side of the rotating frame at the lower end of the extended frame, and an upper stopper for limiting the upward rotation angle of the rotating frame, and the rotating frame at the lower end of the extended frame. It is provided on the lower side of the rotation frame may have a lower stopper for limiting the downward rotation angle.

According to an embodiment of the present invention, it can be easy to control the spraying of granules, and while operating with a tractor, the rotary device of the tractor crushes the soil, and the operation of the sowing device sowing seeds, and the operation of spraying the granules together can be done

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a configuration diagram showing a granule spraying device for mounting a tractor according to an embodiment of the present invention.
Figure 2 is an exemplary view showing a tractor-mounted granular spraying device according to an embodiment of the present invention.
Figure 3 is an exemplary view showing the housing portion and the blade portion in the tractor mounting granular spraying apparatus according to an embodiment of the present invention.
Figure 4 is an exemplary view showing the center of the spray angle control unit in the tractor mounting granular spraying apparatus according to an embodiment of the present invention.
5 is an exemplary view showing the opening/closing amount control unit in the tractor-mounted granule spraying device according to an embodiment of the present invention.
Figure 6 is an exemplary view of the operation of the opening and closing amount control unit in the tractor mounting granular spraying apparatus according to an embodiment of the present invention.
7 is a cross-sectional view for explaining the stirring unit in the tractor-mounted granular spraying apparatus according to an embodiment of the present invention.
8 is an exemplary view showing the auxiliary rotating unit and the sensing unit in the tractor-mounted granule spraying device according to an embodiment of the present invention.
Figure 9 is an exemplary view for explaining the operation of the auxiliary rotating unit in the tractor mounting granules spraying device according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member in between. “Including cases where it is In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein 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 this specification, terms such as “comprise” or “have” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

1 is a configuration diagram showing a granule spraying device for mounting a tractor according to an embodiment of the present invention.

As shown in Figure 1, the tractor mounting granular spraying device may include a base frame unit 100, a housing unit 200, a storage unit 300, a blade unit 400 and a first power unit 500. have.

The base frame part 100 may be coupled to the rear frame 10 of the tractor. The base frame part 100 may be detachable from the rear frame 10 of the tractor. In the present invention, the tractor to which the granular spraying device is mounted is only representative of an example of agricultural machinery, and the granular spraying device is not necessarily limited only to the tractor, and may be installed in other agricultural machinery, of course.

The housing unit 200 may be coupled to the base frame unit 100 . The housing 200 may have an open rear end.

The storage unit 300 may be provided on the upper portion of the housing unit 200, and agrochemicals in the form of small granules may be stored. The granules of the storage unit 300 may be supplied to the inside of the housing unit 200 .

The blade unit 400 may be rotatably provided inside the housing unit 200 , and the granules supplied to the inside of the housing unit 200 may be sprayed through the open rear end of the housing unit 200 . Accordingly, when the tractor is moving, the granules can be sprayed to the rear of the tractor.

The first power unit 500 may be provided under the housing unit 200 , and may rotate the blade unit 400 .

In detail, Figure 2 is an exemplary view showing a tractor-mounted granular spraying apparatus according to an embodiment of the present invention, Figure 3 is a housing portion and a blade portion in the tractor-mounted granular spraying apparatus according to an embodiment of the present invention. It is an example diagram shown.

2 and 3 , the housing 200 may have an upper plate 201 and a lower plate 202 , and a front plate 203 connected to the base frame 100 . A space may be formed inside the housing unit 200 , and an opening 210 may be formed at the rear end of the housing unit 200 so that the inner space of the housing unit 200 may be opened rearwardly.

Also, the housing 200 may have an inlet hole 220 and a barrier 230 .

The inlet hole 220 may be formed through the upper plate 201 . A first power unit 500 is provided at a lower portion of the housing unit 200 , and the driving shaft 510 of the first power unit 500 may be provided perpendicularly to the center of the housing unit 200 , and an inlet hole ( 220 may be formed to be spaced apart from the driving shaft 510 . That is, the inlet hole 220 may be formed eccentrically from the center of the housing 200 .

The barrier 230 may be provided inside the housing 200 . A pair of support pins 610 may be provided on both sides of the rear end of the housing 200 , and both ends of the barrier 230 are respectively connected to the support pins 610 and have a circular shape inside the housing 200 . Banding may be provided. Accordingly, a space formed by the barrier 230 may be formed inside the housing 200 .

The blade unit 400 may be provided in a space formed by the barrier 230 inside the housing unit 200 . The blade unit 400 may have a lower plate 410 , an upper ring plate 420 , and a blade 430 .

The lower plate 410 may be coupled to the driving shaft 510 of the first power unit 500 to rotate integrally with the driving shaft 510 .

The upper ring plate 420 may be provided to be spaced apart from the lower plate 410 on the upper side of the lower plate 410 , and a hole 421 may be formed in the center. The hole 421 may be formed to have a larger diameter than the distance at which the inlet hole 220 is formed with respect to the driving shaft 510 . Accordingly, the granules falling through the inlet hole 220 may be introduced through the hole 421 .

The blade 430 may be provided between the lower plate 410 and the upper ring plate 420 . A plurality of blades 430 may be radially disposed about the driving shaft 510 . When the granules are introduced through the hole 421 in a state in which the blade unit 400 is rotated by the first power unit 500, the blade 430 can strike the incoming granules, and the granules can be moved to the outside. have. Among the particles moving outward, the particles moving forward and laterally are restricted in movement by the barrier 230 , and the particles moving backward may be sprayed through the opening 210 .

And, the tractor mounting granular spraying device may include a spray angle control unit (600).

Figure 4 is an exemplary view showing the center of the spray angle control unit in the tractor mounting granular spraying apparatus according to an embodiment of the present invention.

As shown further including FIG. 4 , the spreading angle adjusting unit 600 may be provided in the housing 200 , and may adjust the spreading angle range of the granules sprayed from the opening 210 .

Specifically, the dispersion angle control unit 600 may have a guide plate 620 , a lever 630 , a locking slit 640 and a first elastic member 650 .

The guide plate 620 may be provided in a pair in the housing unit 200 . The guide plate 620 may be hinged to the support pins 610 provided at both ends of the opening 210 , and through this, it may be possible to rotate around the support pins 610 .

The lever 630 may be provided on one surface 621 of the guide plate 620 in a horizontal direction. A guide piece 623 supporting the lever 630 may be provided on one surface 621 of the guide plate 620 so that the lever 630 can reciprocate in the horizontal direction.

The locking slit 640 may be formed in the lower plate 202 of the housing 200 . A plurality of locking slits 640 may be formed at regular intervals along the circumferential direction around the support pin 610 .

The lock slit 640 may have a width corresponding to the thickness of the lever 630 , and one end 631 of the lever 630 may be inserted into the lock slit 640 . The other end of the lever 630 may be bent.

The first elastic member 650 may be disposed to surround the lever 630 . One end of the first elastic member 650 may be supported by the guide piece 623 adjacent to the other end 632 of the lever 630 , and the other end of the first elastic member 650 protrudes from the lever 630 . It is supported by the formed protrusion pin 635 to elastically support the lever 630 in the direction of the lock slit 640 . Accordingly, when the user pulls the other end of the lever 630 as a handle, the first elastic member 650 is compressed, and one end of the lever 630 may come off the locking slit 640 . Then, when the user removes the force holding the lever 630 after rotating the guide plate 620 , the lever 630 is moved by the elastic restoring force of the first elastic member 650 and one end of the lever 630 is moved. The angle of the guide plate 620 may be adjusted by being coupled to the locking slit 640 .

The granules sprayed from the blade part 400 are limited in movement by the other surface 622 of the guide plate 620 so that they can be sprayed within the angular range formed by the pair of guide plates 620 . A pair of guide plates 620 can be each independently adjusted in angle, and through this, the spraying angle of the granules can be variously adjusted.

The tractor-mounted granule spraying device may include an opening/closing amount control unit 700 .

5 is an exemplary view showing the opening and closing amount adjusting unit in the tractor-mounted granular spraying apparatus according to an embodiment of the present invention, and FIG. 6 is the opening and closing amount adjustment in the tractor-mounted granular spraying apparatus according to an embodiment of the present invention. It is an example diagram of the operation of the part.

1 , 5 and 6 , the opening/closing amount adjusting unit 700 may include a shutter 710 and a second power unit 720 .

The shutter 710 may be provided inside the housing 200 . Specifically, the shutter 710 may be provided on the lower surface of the upper plate 201 to be movable in the horizontal direction.

A connecting bar 715 may be vertically connected to one end of the shutter 710 , and the connecting bar 715 may be provided through a cut-out groove 204 formed in the upper plate 201 . A long hole 716 may be formed in the connecting bar 715 in a vertical direction. When the connecting bar 715 is moved in the horizontal direction along the cut-out groove 204 , the shutter 710 is also moved in the horizontal direction to adjust the opening and closing amount of the inlet hole 220 . The lower portion of the shutter 710 may be supported by the support piece 206 connected to the upper plate 201 , and through this, the shutter 710 may be stably moved horizontally.

The second power unit 720 may be fixed to the housing unit 200 . The second power unit 720 may rotate the arm 721 . The arm 721 may reciprocate around one end 722 , and a coupling hole 723 may be provided at the other end. The coupler 723 may be coupled to the long hole 716 , and the coupler 723 may reciprocate along the long hole 716 .

As shown in (a) of FIG. 6 , when the arm 721 is rotated clockwise and the connecting bar 715 is moved to the right, the shutter 710 is also moved to the right to cover the inlet hole 220, and thus The granules in the storage unit 300 do not flow into the blade unit 400 .

Then, when the arm 721 is rotated counterclockwise and the connecting bar 715 is moved to the left, the inlet hole 220 is opened while the shutter 710 is also moved to the left, and thus the granulation of the storage unit 300 is It can be introduced into the blade part 400 .

And, the tractor mounting granular spraying device may include a stirring unit (350).

7 is a cross-sectional view for explaining the stirring unit in the tractor-mounted granular spraying apparatus according to an embodiment of the present invention.

1 and 7 , the stirring unit 350 may be coupled to the driving shaft 510 at the inner lower end of the storage unit 300 to rotate integrally with the driving shaft 510 . The stirring unit 350 is provided adjacent to the inlet hole 220 , and may pass through the upper portion of the inlet hole 220 when rotating. The stirring unit 350 may stir the granules of the inner lower end of the storage unit 300, and through this, if there are particles adhering to each other, they may be removed.

And, the tractor-mounted granular spraying device may include an auxiliary rotating unit 800 , a sensing unit 850 , and a control unit 900 .

8 is an exemplary view showing the auxiliary rotating part and the sensing unit in the tractor-mounted granule spreading device according to an embodiment of the present invention, and FIG. 9 is an auxiliary rotating part in the tractor-mounted granule spreading device according to an embodiment of the present invention It is an exemplary diagram for explaining the operation of.

1 , 2 , 8 and 9 , the auxiliary rotation unit 800 may have an extension frame 810 , a rotation frame 820 , and a rotation wheel 830 .

The extension frame 810 may be coupled to the base frame part 100 and may extend downward. Specifically, a pair of first flanges 811 spaced apart from each other may be coupled to the base frame part 100 , and the upper end of the extension frame 810 may be disposed between the pair of first flanges 811 . can be provided.

A plurality of first coupling holes 812 may be formed in the first flange 811 , and a plurality of second coupling holes 813 may be formed in the extension frame 810 to correspond to the first coupling holes 812 in the longitudinal direction. ) can be formed. As the fastening member 814 is coupled to the first coupling hole 812 and the second coupling hole 813 , the extension frame 810 may be coupled to the first flange 811 , and the extension frame 810 moves downward. The length extending to the can also be adjusted. A pair of second flanges 815 may be provided at the lower end of the extension frame 810 .

The rotation frame 820 may be rotated by being hinged at an upper end thereof to the second flange 815 . In addition, the rotating wheel 830 may be rotatably provided at the lower end of the rotating frame 820 . The length of the extension frame 810 may be adjusted so that the rotating wheel 830 touches the ground. Since the rotary wheel 830 is in contact with the pigtail, it can be rotated when the tractor moves. The rotating wheel 830 may have a plurality of spikes 831 formed on the rim to increase friction with the ground.

The sensing unit 850 may include a sensing target 851 and a sensor 852 .

The sensing target 851 may be provided on the rotating wheel 830 , and may be rotated together with the rotating wheel 830 . The sensor 852 may be provided in the rotation frame 820 and may sense the sensing target 851 . When the sensing target 851 rotated together with the rotating wheel 830 is positioned to face the sensor 852 , the sensor 852 may sense the sensing target 851 and generate a signal. Using this signal, not only whether the rotation wheel 830 rotates, but also the rotation speed of the rotation wheel 830 can be calculated. The sensed globe 851 and the sensor 852 are not particularly limited, for example, a magnet is used as the sensed globe 851 , and the sensor 852 is a magnet that can sense the sensed globe 851 . Any type of sensor may be used.

The controller 900 may receive a signal from the sensor 852 . In addition, the control unit 900 may control the operation of the first power unit 500 . Specifically, the control unit 900 may set the operation and maintenance time of the first power unit 500 from an arbitrary rotation point of the rotating wheel 830 . That is, the controller 900 sets the moment when the sensor 852 senses the earth 851 to be sensed at an arbitrary point in time while the rotating wheel 830 is being rotated as the starting point, and the first power unit 500 is It may be operated to set a time for which the blade unit 400 is rotated. For example, if the control unit 900 sets the time for which the first power unit 500 is operated from any point in time to 1 minute, the blade unit 400 can be rotated for 1 minute, and through this, the The time of application can be controlled. By controlling the time at which the granules are sprayed, the amount of spraying of the granules can also be controlled.

Furthermore, the control unit 900 may control the operation of the second power unit 720 , and through this, the amount of opening and closing of the inlet hole 220 may be adjusted to control the supply amount of the granules.

In addition, the auxiliary rotating part 800 may have a second elastic member 840 . One end of the second elastic member 840 may be connected to the extension frame 810 , and the other end may be connected to the rotation frame 820 , and may provide an elastic restoring force for downward rotation of the rotation frame 820 . Through this, even if the height of the ground changes, the rotary wheel 830 can continuously touch the ground.

Also, the auxiliary rotation unit 800 may have an upper stopper 841 and a lower stopper 842 .

The upper stopper 841 may be provided at the lower end of the extension frame 810, specifically, at the upper side of the rotation frame 820 in the second flange 815, and the lower stopper 842 is at the second flange 815. It may be provided below the rotation frame 820 .

As shown in (a) of Figure 9, when the rotation frame 820 is rotated upward, the rotation frame 820 is caught by the upper stopper 841, and through this, the upward rotation angle of the rotation frame 820 is to be limited. can

And, as shown in (b) of Figure 9, when the rotation frame 820 is rotated downward, the rotation frame 820 is caught by the lower stopper 842, and through this, the downward rotation angle of the rotation frame 820 is may be limited.

According to the present invention, it can be easy to control the spraying of granules, and the rotary device of the tractor crushes the soil finely while operating with the tractor, the sowing device sows the seeds, and the operation of spraying the granules can be done together .

The foregoing description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: base frame part 200: housing part
300: storage unit 350: stirring unit
400: blade unit 500: first power unit
600: spread angle control unit 620: guide plate
630: lever 640: lock slit
700: opening/closing amount control unit 710: shutter
800: auxiliary rotating unit 830: rotating wheel
840: second elastic member 841: upper stopper
842: lower stopper 850: sensing unit
900: control unit

Claims (9)

a base frame portion coupled to the rear frame of the tractor;
a housing portion coupled to the base frame portion, having an opening opened rearward, and having an inlet hole formed thereon;
a storage unit provided at an upper portion of the housing unit and storing granules supplied to the inside of the housing unit through the inlet hole;
a blade unit rotatably provided on the inside of the housing unit and spraying the granules supplied through the inlet hole rearward through the opening;
a first power unit provided under the housing unit and rotating the blade unit; and
It is provided in the housing portion, and includes a;
The spray angle control unit,
a guide plate provided as a pair in the housing unit, rotatable around the support pins respectively provided at both ends of the opening, and provided with a guide piece on one surface;
a lever movable in a horizontal direction on the guide plate and having a protruding pin formed to protrude;
a plurality of locking slits formed at regular intervals along the circumferential direction of the housing part with the support pin as the center and having a width corresponding to the thickness of the lever into which one end of the lever can be inserted;
Both ends are supported by the guide piece of the guide plate and the protruding pin of the lever, and the tractor mounting granule dispersing device, characterized in that it has a first elastic member for elastically supporting the lever in the locking slit direction. delete delete According to claim 1,
a shutter provided to be movable in the horizontal direction in the housing portion to adjust the opening/closing amount of the inlet hole;
A tractor-mounted granule dispersing device, which is provided in the housing and includes an opening/closing amount control unit having a second power unit for moving the shutter. According to claim 1,
It is provided adjacent to the inlet hole in the inner lower end of the storage unit, the tractor mounting granular spraying device, characterized in that it comprises a stirring unit for stirring the granules while rotating by receiving power from the first power unit. According to claim 1,
An extension frame coupled to the base frame portion and extending downwardly, a rotation frame hingedly connected to a lower end of the extension frame, and rotatably provided at the lower end of the rotation frame and rotated in contact with the ground when the tractor is moved Auxiliary rotating unit having a rotating wheel;
a sensing unit provided on the rotating wheel and rotating together with the rotating wheel, and a sensor provided on the rotating frame and configured to sense the sensing unit; and
Receiving a signal from the sensor, the tractor mounting granule dispersing device, characterized in that it comprises a control unit for controlling the operation of the first power unit. 7. The method of claim 6,
The control unit sets the operation and maintenance time of the first power unit from an arbitrary rotation point of the rotary wheel, and a particle dispersing apparatus for mounting a tractor, characterized in that it controls the time at which the particles are sprayed by the blade unit. 7. The method of claim 6,
The auxiliary rotating part
One end is connected to the extension frame, the other end is connected to the rotating frame, the tractor mounting granular spraying device, characterized in that it has a second elastic member for providing an elastic restoring force so that the rotating frame is rotated downward. 7. The method of claim 6,
The auxiliary rotating part
an upper stopper provided on the upper side of the rotating frame at the lower end of the extension frame and limiting the upward rotation angle of the rotating frame;
It is provided on the lower side of the rotating frame at the lower end of the extension frame, the tractor mounting granules dispersing device, characterized in that it has a lower stopper for limiting the downward rotation angle of the rotating frame.

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