JPH0616656B2 - Pump device in fertilizer application - Google Patents

Description

The present invention relates to a fertilizer application device, and more particularly to a fertilizer application device mounted on a paddy field vehicle such as a rice transplanter and a submerged paddy soil seeder. The present invention relates to a pump device for liquid fertilizer.

(B) Conventional Technology A rice transplanter 1 equipped with a conventional fertilizer application apparatus is shown in FIGS.
As shown in Fig. 3, the fertilizer tanks 3, 3 are located on the left and right of the driver's seat 2.
And a nozzle 9 is installed near each planter 6 of the planting section 5. Then, the fertilizer tanks 3, 3 are connected to a sub tank 11 near the center of the traveling machine body by a suction hose 10, and the sub tank 11 is further connected.
Is guided to a pump 13 installed below the driver's seat through a large number of hoses 12 ... And
The pump 13 has a large number of flex rotor pumps 13a ... Which are arranged side by side in the longitudinal direction of the machine body according to the number of planted rows, and these pumps are rotationally driven from a PTO drive shaft 15 via a power transmission device 16 such as a belt. It Further, the discharge ports of the rotor pumps 13a are connected to the indicators 20 installed next to the driver's seat 2 via the hoses 19 and the vicinity of the planter 6 from the indicators 20 via the hoses 21 again. Of the nozzle 9 ...

Based on the above configuration, when the pump 20 is driven in association with the planting work, the paste (or liquid) fertilizer in the fertilizer tank 3 is supplied to the sub tank 11 via the hose 10, and further in the sub tank 11, a large number of them are supplied. Of the pumps, and each of them is sucked into the rotor pump 13 and further discharged from the discharge port of each pump to each indicator 20 via each hose 19. Thereby, the driver in the driver's seat 2 can confirm the flow of each hose by the indicator 20, and the hose 2 can be checked from each indicator 20.
The fertilizer is guided to the nozzle 9 via 1 and fertilized in a streak shape along the vicinity of the planted seedling by the planter 6.

(C) Problems to be Solved by the Invention By the way, the conventional fertilizer application pump 13 is composed of a large number of flex rotor pumps 13a ...
In addition, the rotor pumps 13a are arranged side by side in a long line, the pipes of the hoses 12 and 19 are dispersed, the piping of each hose and the fixing work are very troublesome, and the support structure of the pump 13 itself is provided. Was getting complicated.

(D) Means for Solving the Problem The present invention is intended to solve the above-mentioned problems, and as shown in FIGS. 1 to 4, the pump device 40 includes a large number of screw pumps 40a. .About.40f, and these screw pumps are arranged on the same circumference so that the screw axis 75 of the screw pump faces the longitudinal direction of the machine body.

(E) Operation Based on the above-described configuration, the drive shafts 66 installed on the same circumference are simultaneously moved through the intermediate gears 85 and the gears fixed to the respective drive shafts 66 and meshed with the intermediate gears 85. By being rotated in the direction, the screw pumps 40a to 40f are driven, the fertilizer is discharged from the sub-tank 87 facing the suction side thereof to the hoses 41 located on the circumference, and the soil is discharged from the nozzles. Is fertilized.

(F) Embodiments Embodiments of the present invention will be described below with reference to the drawings.

The riding rice transplanter 21 has a traveling machine body 25 supported by front wheels 22 and rear wheels 23, as shown in FIGS. 10 and 11, and the traveling machine body 25 has an engine at the front portion of the front wheels. 26 is mounted, and a driver's seat 29 is arranged so that the seat 27 is located at an intermediate portion between the front and rear wheels, that is, a center of gravity of the machine. Further, a planting part 30 is supported at the rear of the traveling machine body 25 via a link 28 so as to be able to move up and down, and a large number of planters 6 ... Long seedling stand that can be placed 3
1 is provided.

Fertilizer tanks 32, 32 for paste-like or liquid fertilizers are installed on the left and right sides of the front of the machine body, and a hose 36 is connected through the machine body frame 35 so as to connect the left and right tanks 32, Further, a suction hose 39 extends rearward from the hose 36 below the step surface 37 of the driver's seat 29, and communicates with a pump device 40 arranged below the driver's seat 27. Furthermore,
From the pump device 40, a hose 41 according to the number of planting lines ...
To the nozzles 46 near the planter 6 via the hoses 43 and the drainage prevention valve 45. There is. In the figure, 44
Is a return hose returned from the switching valve 38 to the sub tank of the pump device 40.

On the other hand, as shown in FIG. 1 to FIG.
0 is driven from an RTO drive shaft 47 extending through almost the center of the machine body through a conversion device 49. That is, the transmission 49 has three shafts 51 supported by the case 50,
A chain 57 is wound around a sprocket 55 fixed to the input shaft 51 and a sprocket 56 fixed to the PTO drive shaft 47 to transmit power. Further, a gear set 60 which is operated to be switched by a shift lever 59 is slidably supported on the input shaft 51, and a large number of gears 6 are mounted on the intermediate shaft 52.
.. are fixed, and a gear set 63 which is switched by a shift lever 62 is also slidably supported on the output shaft 53. Further, a sprocket 65 is fixed to the output shaft 53 so as to project at one end, and a chain 69 is wound between the sprocket 65 and a sprocket 67 fixed to one drive shaft 66a of the pump device 40. 1, 70 and 71 in FIG. 1 are chain cases, and 72 in FIG. 5 is a fixed stage for attaching the transmission 49 to the frame 35.

On the other hand, the pump device 40 is composed of screw pumps 40a ... As shown in FIG. 6, and the screw pumps 40a .. are made of rubber having a screw shaft 75 having a threaded recess and a hole into which the screw shaft 75 is fitted. The drive shaft 66 is composed of a pump body 76, and the drive shaft 66 is connected to the screw shaft 75 via a joint 77.
It is fixed to. As shown in FIGS. 1 to 4 and 7, the pump device 40 has a large number (six) of screw pumps 40a to 40f on the same circumference and their screw axes oriented in the longitudinal direction of the machine body. The drive shafts 66 ... Are also arranged on the same circumference. These drive shafts 66 ... Are rotatably and oil-tightly supported by a case 82, and a gear 83 is fixed. Furthermore,
At the center of the case 82, an intermediate shaft 85 is provided with an intermediate gear 85.
Are rotatably supported, and as shown in detail in FIG. 7, the gears 83 of the drive shaft 66 are interlocked with each other via the intermediate gear 85. Incidentally, one of these drive shafts 66
a is extended and power is transmitted from the transmission 49. Furthermore, both cases 81 and 8 that form the pump device 40.
A cylindrical sub-tank case 86 is sandwiched between the two in an oil-tight manner by bolts, and a space surrounded by these cases constitutes a sub-tank 87. Therefore, the hose 39 is communicated with the sub-tank 87, the suction side a of each of the pumps 40a to 40b is open facing the sub-tank 87, and the discharge side b of each pump is connected to each cover 80. It communicates with the fixed hose 41.

Since the present embodiment is configured as described above, the gear ratio of the transmission 49 is set in advance based on the seedling type, planting interval, and the like. That is, the gear set 60 is selectively meshed with the predetermined gear 61 on the intermediate shaft by switching the shift lever 59, and the gear set 63 is selectively meshed with the predetermined gear 61 on the intermediate shaft by another shift lever 62.

On the other hand, the fertilizer tanks 32, 32 installed in the front part of the fuselage contain paste or liquid fertilizer, and the fertilizer in the tank is filled with the hose 36 based on its fluidity and head difference.
Also, it is supplied to the sub tank 87 through the suction hose 39.

Then, when the PTO drive shaft 47 rotates with the start of the planting work, the rotation is transmitted to the input shaft 51 of the transmission 49 through the sprocket 56, the chain 57 and the sprocket 55, and the gear engagement is set in advance. The speed is changed to a predetermined number of revolutions and transmitted to the output shaft 53, and further transmitted to the pump drive shaft 66a via the sprocket 65, the chain 69 and the sprocket 67. Then, the intermediate gear 85 is rotated by the rotation of the gear 83 fixed to the one drive shaft 66a, and further, the intermediate gear 85 is arranged on the circumference through each gear 83 meshing with the intermediate gear. A large number of drive shafts 66 ... Rotate simultaneously and in the same direction. As a result, the screw shafts 75 of the pumps 40a to 40f are rotated through the joint 77, and the pumps simultaneously paste the paste-like or liquid fertilizer in the sub-tank 87 from the suction side facing the sub-tank to the discharge side. b, is further sent to the flow sensor 42 and the switching valve 38 through each hose 41, and is continuously fertilized into the soil from each nozzle 46 through the hose 43 and the drift prevention valve 45. , Each pump 4
Since the screw shafts 75 of 0a to 40f are eccentrically moved, joints 77 are installed between the screw shafts 75 and the drive shaft 66. The paste-like fertilizer is stirred, prevented from solidifying, and smoothly flows into each of the pumps 40a to 40f in a uniform state.

In the above embodiment, one pump drive shaft 66a is extended and power is transmitted to the pump device 40 via the shaft 66a. However, the intermediate shaft 84 is extended and the pump is moved from the intermediate shaft 84. Power may be transmitted to the device.

Further, in the above-described embodiment, the drive shafts 66 ... Are installed on the same circumference around the intermediate shaft 84, and the drive shafts 66 are driven by the gears 84 on the intermediate shaft. As shown in FIG. 8, each drive shaft 66 'is installed on the same circumference, and the sprocket 90 ... Is fixed to each drive shaft 66', and a chain 91 is wound around the sprocket 90 ... in a polygonal shape. The chain 91 may drive the drive shafts 66 ′ to rotate simultaneously and in the same direction.

In addition, the above-described embodiment describes the case where the present invention is applied to a rice transplanter for 6-row planting, and accordingly, the screw pumps 40a to 40f are also 6-fold.
Although required individually, in the case of 5-row planting or 4-row planting, substantially the same traveling machine body 25 can be used with only a slight change such as changing the size of the engine 26. Therefore, in the case of 5-row or 4-row planting, the number of pumps installed is different,
As shown in the figure, by using only the screw pump portions that are not needed and closing the lids 92, 93, the pump device 40 and the transmission device 49 can be handled by the same device without replacing them with special ones. it can.

Also, the above-mentioned implementation side explained the rice transplanter for riding,
Of course, it can also be applied to other paddy field work vehicles such as flooded paddy soil seeders.

(G) Effect of the Invention As described above, according to the present invention, the pump device 40
Since it is composed of a large number of screw pumps 40a to 40f and these screw pumps are arranged on the same circumference, a large number of pumps corresponding to the number of planting threads can be compactly assembled, and the weight and mounting of the pump device can be reduced. The degree of freedom of position can be increased, and due to this, the front and rear balance of the traveling paddy wheels and other aircraft can be maintained in a good condition. Also,
Since the discharge ports of the pumps 40a to 40f are also arranged on the circumference in a concentrated manner, each hose is centralized to facilitate the piping work and its installation work, and the work of attaching the fertilizer applicator to the paddy field vehicle etc. To be simplified. Further, the pump-side case 81 and the drive shaft-side case 82 can be formed in a circular shape, and therefore the sub-tank case 85 can be held between these pumps 40a-40b.
The sub tank 87 can be easily arranged facing the
Moreover, since the sub-tank 87 can also be formed in a circular shape, the mating surfaces can be easily and reliably sealed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a transmission and a pump device according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a plan view thereof. 5 is a transverse sectional view of the transmission, FIG. 6 is a sectional view showing a screw pump, and FIG. 7 is a schematic front view showing a pump driving portion. Further, FIG. 8 is a sectional view showing a partially modified pump device, and FIG. 9 is a sectional view showing a state where a part of the pump is not used. 10 is an overall side view showing a riding rice transplanter to which the present invention is applied, and FIG. 11 is a plan view thereof. FIG. 12 is a side view showing a conventional riding rice transplanter with a fertilizer application device, and FIG. 13 is a rear view seen from the rear. 21 ... Passenger paddy work vehicle, 25 ... Aircraft, 30 ... Planting part, 31 ... Long seedling stand, 32 ... Fertilizer tank, 40 ... Pump device, 39 ... Suction hose, 40a-40f ... … Screw pump, 40 …… Discharge side hose, 49 …… Transmission device, 66 …… Drive shaft, 75 …… Screw shaft, 77 …… Coupling, 83 …… Gear, 85 …… Intermediate gear, 87 …… Sub tank.

Claims (3)

[Claims] 1. A pump device in a fertilizer application device for sucking fertilizer from a fertilizer tank and discharging it toward a nozzle, wherein the pump device comprises a number of screw pumps, and these screw pumps are arranged on the same circumference. A pump device in a fertilizer applicator. 2. The fertilizer application apparatus is a fertilizer application apparatus mounted on a paddy field vehicle, and is arranged such that a pump axis of the screw pump is oriented in the front-rear direction of the machine body.
A pump device in the fertilizer applicator according to the item. 3. The pump device in the fertilizer application apparatus according to claim 1, wherein the fertilizer is a paste fertilizer.