JPH0453230Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a power spreader used in agricultural work, and more particularly to a discharge device for powder spread by the spreader.

(Prior art) As a result of the recent mechanization and labor-saving efforts of agricultural power spreaders, the spread of large machines has resulted in the spread of power spreaders being significantly shortened to, for example, approximately 5 minutes per 10a. Things are being provided and used.

However, such spreaders with high-speed spreading functions often require a large number of people to perform highly skilled work due to ease of handling and operability, and generally the spraying accuracy is poor, so they are not suitable for use with chemical fertilizers. It may not be suitable for use as a spreader that requires high-precision spraying in small amounts.

In addition, power spreaders with coarse spraying accuracy, light weight, and good operability are in demand as suitable for personal or small-scale spraying work, but power spreaders are generally powered by tractors, etc. No suitable power spreader has been provided because the power is obtained as mechanical output.

The above-mentioned power spreader is usually configured as a combination of a hopper that stores the powder (powder, grains, etc.) to be spread, and a rotating blade device that spreads the powder that flows down from the hopper. As mentioned above, it is commonly used by being mounted on a tractor or the like. Furthermore, there are systems in which the powder is allowed to flow down from the hopper by gravity, or a stirring device such as an agitator is provided to improve the fluidity of the powder to be spread during the flow down.

(Problems to be solved by the invention) However, according to the study conducted by the inventors of the present invention, it was found that there is a problem in that it is difficult to achieve high-precision spraying with the conventional power spreader as described above. . The reason why such highly accurate dispersion is difficult to achieve is considered to be due to the usage conditions and the configuration of the device.

That is, as mentioned above, the power spreader is configured as a combination of a hopper that stores powder to be spread (powder, grains, etc.) and a rotating blade device for spreading the powder flowing down from the hopper. However, because of this configuration, the material to be spread is discharged from the discharge opening at the bottom of the hopper by gravity due to its own weight, or when it is flowing down. Even if methods such as agitation with an agitator or the like are used to increase fluidization, the former gravity flow method described above tends to cause the material to be spread to become compacted due to the influence of engine vibrations from tractors, etc. This can lead to blockages due to bridging, and wide variations in the amount of spraying due to changes in flow conditions, which can lead to serious problems when quantitative spraying is required. In addition, when the latter agitator is used, depending on the type of the material to be spread, the agitation may cause the material to be powdered, increasing scattering loss during spraying, and causing damage to the surrounding area of the spreader. This poses the problem of deteriorating the working environment.

The present invention was developed from the above viewpoint, and its purpose is to prevent the material to be spread from clogging in the hopper or near the discharge opening, and to ensure uniform flowability of the material to be spread. It is an object of the present invention to provide a power spreader that is lightweight and has good operability, which realizes quantification of the amount of spraying, and which does not cause any adverse effects when using a stirring device or the like.

(Means for Solving the Problems) The agricultural power spreader according to the present invention, which has been made to achieve the above object, is characterized by providing a bottom flat part at the bottom of the hopper, A discharge opening is formed in the center of the bottom plane part for flowing down the powder and granular material to be spread (hereinafter referred to as the material to be spread) stored in the interior. The power spreader is equipped with rotary blades for dispersing materials, and the rotary power shaft, on which the rotary blades are mounted, extends into the hopper through the discharge opening, and the rotary power shaft is A rotary disk having a diameter larger than the diameter of the discharge opening is pivotally attached to the extending end so as to rotate integrally with the bottom plane of the hopper while facing away from the bottom surface.
It is constructed so that it is slightly inclined with respect to a plane perpendicular to the rotating power axis.

(Function) By having the above-described configuration, the present invention causes vertical movement of the material to be spread on the rotary plate as the rotary plate installed at an inclination (inclined rotary disk) rotates. This relieves the compaction in the hopper, thereby preventing the occurrence of bridging of the material to be spread, and thereby maintaining good fluidity of the material to be spread. Therefore, the inclination of such an inclined rotary plate is determined by taking into account the degree necessary for good vertical movement of the material to be spread, and may not necessarily be uniform depending on the particle size, properties, etc. of the material to be spread. It is not decided exactly, but generally it is 3 to 5.
Good results are often obtained when the amount of

(Example) The present invention will be described below based on an example shown in the drawings.

In the figure, reference numeral 1 indicates a discharge opening formed in a small circle at the bottom of a cylindrical hopper 5 for discharging materials to be spread. The discharge opening 1 is provided in the center of the bottom plane portion 5c through the tapered wall 5b. Note that this discharge opening 1 is the hopper 5 in this example.
In the relatively large diameter opening formed on the bottom plane of the
It is formed by assembling a discharge opening diameter adjusting disk 9 having a small diameter opening, so that by replacing the discharge opening diameter adjusting disk 9,
The diameter of the discharge opening 1 can be changed and adjusted as necessary.

Reference numeral 7 denotes pillars for supporting the hopper 5, and a total of three pillars are arranged, for example, at 90° intervals in the circumferential direction of the cylindrical hopper 5, and the upper end side is connected to the outer periphery of the cylindrical portion of the hopper 5. The lower end side is fixed to a disc-shaped support frame 8.

A motor 6, which is a power unit for spreading, is fixed to the center of the support frame 8, and the output shaft 4 of the motor 6 extends vertically upward and passes through the discharge opening 1 of the hopper 5 for the material to be spread. It extends into the hopper 5.

A rotary blade 3 for dispersing the material to be spread is attached to the output shaft 4 so as to be located below the bottom plane part 5c of the hopper 5, and a rotor blade 3 for dispersing the material to be spread is attached to the output shaft 4, and is located below the bottom plane part 5c of the hopper 5. A rotating body 2, which is a characteristic structure of this example, is integrally attached to the output shaft tip 4a located in the hopper through the discharge opening 1 of the hopper, so that the material to be spread can be discharged. A device is formed.

The rotary body 2 is for imparting vertical movement to the material to be spread stored in the hopper 5 as the output shaft 4 rotates, and for this purpose, the rotary body 2 is , an inclined rotary disk 2a which is opposed to each other with a predetermined gap maintained above the hopper bottom plane portion 5c, and is provided on the lower surface of the inclined rotary disk 2a so as to form a generally radial direction as shown in FIG. The guide plate 2b is provided with three guide plates 2b for guiding the powder, which is the material to be spread. As shown in FIG. 4, the guide plate 2b of this example has a radially inner portion biased in a direction opposite to the rotation direction of the rotating body 2 shown by the arrow in the figure. As a result, as the rotating body 2 rotates, a moving force is applied to the powder in contact with the guide plate in the radial direction. Note that this guide plate 2b
The lower end of the hopper should be adjusted as far as possible to the extent that it does not come into contact with the upper surface of the bottom flat part 5c of the hopper (actually, in this example, the discharge opening diameter adjusting disc 9 is fixed on the bottom flat part 5c). It is preferable to provide it close to. The guide plate 2b described above has the advantage that a fixed amount of discharge can be obtained because the guide plate 2b moves the amount to the discharge opening according to the rotational speed of the rotating body and the pitch of its installation.

It is preferable that the above-mentioned rotating body 2 in this example is set so that its inclined rotating disk 2a has an inclination of about 3 to 5 degrees with respect to a plane perpendicular to the output shaft 4, which is the rotation axis. By setting the tilt of the tilted rotary disk 2a in this manner, as the rotary body 2 rotates, the powder of the material to be spread existing on the upper part of the tilted rotary disk 2a is caused to move up and down. As a result, the compaction inside the hopper is alleviated, thereby preventing the occurrence of bridging, thereby making it possible to maintain good fluidity of the material to be spread.

According to the power spreader with the above configuration, the output shaft 4, which forms the power shaft of the rotary body constituting the discharge device, is used in common with the power shaft of the spraying rotor located below the discharge opening 1. Therefore, the rotary body 2 is driven by the motor 6 of the spraying power unit, and the device can be easily constructed, small and lightweight, and does not require mechanical output from a tractor or the like. Therefore, there is an advantage that there is no restriction on the mounting position on the tractor or the like.

(Effects of the invention) According to the invention, when distributing fertilizers such as granular fertilizers with variable particle sizes, there is no bridging of the fertilizer in the hopper, and the fertilizer flows smoothly and uniformly toward the discharge opening at the bottom of the hopper. Because the water flows down to the ground, it is possible to set the spray amount with high precision.Also, because the power of the spreader can be set separately from the tractor power, it is possible to set the spreader power separately from the tractor power. In some cases, it is easy to reduce the weight of the spreader, and if the spreader is attached to the front of the tractor, it is possible to carry out spreading and plowing operations at the same time. There are excellent practical benefits in that it can also be obtained.

[Brief explanation of drawings]

Figure 1 is a diagram showing an example of a general configuration of an embodiment of a power spreader according to the present invention, Figure 2 is a vertical sectional view taken along line A-A in Figure 1, and Figure 3 is a diagram showing the rotation of the discharge device. FIG. 4 is a bottom view of the rotating body. DESCRIPTION OF SYMBOLS 1... Discharge opening, 2... Rotating body, 2a... Inclined rotating disk, 2b... Guide plate, 3... Rotating blade, 4... Output shaft, 4a... Tip, 5... Hopper, 5a... ...Cylindrical part, 5b...Tapered part, 5c...
... Bottom plane part, 6 ... Motor (power unit for dispersion), 7 ... Support column, 8 ... Frame, 9 ... Disc for adjusting discharge opening diameter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A bottom flat part is provided at the bottom of the hopper, and a discharge opening is formed in the center of the bottom flat part to allow the powder to be spread stored in the hopper to flow down. death,
The power spreader has a rotary blade installed below the discharge opening for dispersing the powder and granular material to be spread that flows down from the discharge opening, and the rotary power shaft on which the rotary blade is attached is connected to the The rotary power shaft extends into the hopper through the discharge opening, and at the extending end of the rotary power shaft, a rotary disk having a diameter larger than the discharge opening is integrally rotated at a distance from the bottom plane of the hopper. A power spreader for agricultural use, characterized in that the rotary disk is mounted on a shaft in a manner similar to the above, and that the rotary disk is slightly inclined with respect to a plane perpendicular to the rotary power shaft. (2) The agricultural power spreader as set forth in claim (1) of claim 1, wherein the rotating body has an inclination angle of 3 to 5 degrees with respect to a plane perpendicular to the rotating power axis.