JPH01228410A - Driving structure for fertilizer delivery unit - Google Patents

Abstract

PURPOSE:To provide the title driving structure so designed that a fertilizer delivery section, a speed charge section for said delivery section and a mechanical power output section of driving said speed change section are vertically connected in series, thereby the driving mechanism for the fertilizer delivery section can compactly be fitted in the space of the longitudinal direction of the machine body. CONSTITUTION:The connecting shaft 30 of a mechanical power output section and a sub-speed change shaft 37 of a speed change section are arranged in the tilted vertical direction so that said shaft 37 as the input shaft is rear- located. The main-speed change shaft 40 located behind said shaft 37 somewhat apart therefrom and the first shaft 44 of a pump driving section are arranged in the tilted vertical direction so that said first shaft 44 is front-located. Thus, a series of driving mechanism from the connecting shaft 30 at the lower side to the first shaft 44 at the upper side are vertically arranged, therefore, being able to be fitted compactly in the narrow space of the longitudinal direction of the machine body.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drive structure for a fertilizer dispensing device for dispensing a fluid fertilizer such as a paste fertilizer or a liquid fertilizer, or a granular fertilizer. The present invention relates to a drive structure for driving a device.

[Traditional technique]

BACKGROUND OF THE INVENTION Fertilizers have been put into practical use that apply highly viscous liquid fertilizer, commonly known as paste fertilizer, into the soil at the same time as seedling planting or sowing using paddy field working machines such as rice transplanters and direct sowing machines.

This fertilizer application device has a structure in which a fertilizer pump disposed between a fertilizer tank and a fertilizer application nozzle applies paste-like fertilizer in the fertilizer tank into the soil from the fertilizer application nozzle.

Japanese Utility Model Application Publication No. 59-92627 has proposed a device in which this type of fertilization device is installed in a walking rice transplanter. This product has a structure in which a frame plate perpendicular to the direction of movement of the machine is fixed to the lower part of the fertilizer tank, and a transmission and fertilizer pump are attached to the opposite side of the frame plate from the planting device. The axes of the pump and the transmission shafts that drive the fertilizer pump are arranged along the longitudinal direction of the machine.

[Problems to be Solved by the Invention] By the way, the above-mentioned publication uses a frame plate to catch the mud thrown up by the wheels and planting rods, thereby preventing the mud from accumulating on the fertilizer pump and transmission device. However, since the input shaft of the transmission and the power take-off shaft inside the transmission case are connected by a longitudinal transmission shaft with universal joints at both ends, the length of this transmission shaft can be adjusted freely. Since it cannot be made shorter than the coupling, the front-to-back length between the power take-off shaft and the input shaft becomes long, which is disadvantageous in that the space in the front-to-back direction of the entire transmission cannot be reduced.

Furthermore, since it is necessary to interpose a bevel gear transmission mechanism between the power take-off shaft and the transmission shaft, there is also the problem that the power transmission structure becomes complicated.

In view of the above-mentioned conventional circumstances, the present invention was devised to solve the problems.The present invention is a fertilizer dispensing device that allows the transmission part that drives the fertilizer dispensing section to be compactly mounted within the space in the longitudinal direction of the machine body. The purpose of this implementation is to provide a drive structure for.

[Means to solve the problem]

The present invention which achieves the above object includes a fertilizer dispensing section for dispensing the fertilizer in the fertilizer tank to a fertilizing section, and a variable speed drive for this fertilizer dispensing section, which is mounted on a frame plate parallel to the traveling direction provided on the machine body below the fertilizer tank. A transmission section and a power take-off section for driving the transmission section are connected in the vertical direction.

[Created for]

As shown in FIG. 1, when viewed from the side, the connection shaft (output shaft) 30 of the power take-off section 28 and the sub-transmission shaft (input shaft) 37 of the transmission section 38 are such that the sub-transmission shaft 37 as an input shaft is located at the rear. The transmission shaft (output shaft) 40 of the transmission section 38 is disposed diagonally up and down, and is arranged at a distance rearward from the sub-transmission shaft 37, and the first shaft (input shaft) of the pump drive section 68. shaft)
44 means that the first shaft 44 of the pump drive unit 68 is disposed diagonally in the up and down direction, so that the first shaft 44 (input shaft) is connected from the lower connection shaft (output shaft) 30 to the upper first shaft 44 (input shaft). ) are arranged in the vertical direction, so that they can be arranged compactly in a narrow space in the front-rear direction.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, drawings showing the present invention as an embodiment will be described.

In FIG. 4, a walking rice transplanter 1 has a machine body 2 supported by a float 3 that slides on the rice field, and running wheels 4 arranged on both left and right sides of the machine body 2 that touch the tiller. Run. At the rear of this machine body 2, a seedling mounting table 5 is provided which is obliquely installed in a manner that is low in the front and high in the rear, and is movable back and forth in the left and right direction, and a planting rod 6 is provided opposite to the lower part of this seedling mounting table 5. . A control handle 7 whose base end is fixed to the body 2 below the seedling table 5 extends rearward along the back surface of the seedling table 5, and a control handle 7 that drives the rice transplanter 1 is located in front of the body 2. It is equipped with an engine 9.

This rice transplanter 1 is configured to be equipped with a fertilizer application device IO, and this fertilizer application device 10 supplies fluid fertilizer such as paste fertilizer (including paste fertilizer mixed with granular fertilizer) or liquid fertilizer. It consists of a fertilizer tank 11, a fertilizer pump 12 that sucks in and discharges the fluid fertilizer in the fertilizer tank 11, and a fertilizer nozzle 13 that guides and fertilizes the fluid fertilizer discharged from the fertilizer pump 12 into the soil. .

This fertilizer pump 12 and a pump chamber 57, which will be described later, are arranged directly below the fertilizer tank 11, and the fertilizer tank 11 and the pump chamber 57 are connected by a short suction hose 14. In addition, the discharge port of the fertilizer pump 12 and the fertilizer application nozzle 1
3 are connected by a connecting pipe 15, and a fertilization monitor 18 is disposed in the middle of this connecting vibrator 15.

The fertilizer pump 12 is driven by a transmission mechanism 21 having a gear 19a that meshes with a gear 17 fixed to a planting PTO shaft 16 installed in the machine body 2, as shown in FIG. , a fertilizer pump 12 which is configured into a unit with a small number of threads in which two threaded pumps, the pump axis of which is in the left-right direction of the machine body 2, are arranged side by side, and the fertilizer pump 12 has these two threads as a constituent unit; It is configured as a pump unit 20 that can be assembled and disassembled integrally with a transmission mechanism 21 that drives and rotates the pump 12, and the lower end of this pump unit 20 is connected to the gear 17 of the planted PTO shaft 16, and the upper end is connected to the gear 17 of the planting PTO shaft 16. It has a structure that allows it to be attached to and detached from the mounting seat 26.

That is, as shown in FIG. 1, a drive case 22 extending rearward to drive the planting rod 6 is provided with a planting PTO shaft 16 extending in a direction perpendicular to the direction of movement of the machine body. In addition, the pump unit 20 has a mounting surface of a power extraction case 29 provided on its lower end side removably attached to a lower mounting seat 25 provided on the drive case 22 with a mounting bolt 27, and a mounting surface of a power extraction case 29 provided on its upper end side. The upper mounting seat 24 provided on the side of the fertilizer pump 12 is connected to the mounting seat 26 fixed to the drive case 22, and an auxiliary bracket connected above the mounting seat 26)
It is removably attached with a mounting bolt 27 via 26a. The upper end of the upper mounting seat 24 is attached to a horizontal mounting plate 24a fixed to the aircraft body, and the connecting hole 25a provided in the lower mounting seat 25 is closed by a removable lid when the fertilization device 10 is not installed. be done.

As shown in FIG. 2, an inner gear 31 and an outer sprocket 32 are fixed to a connecting shaft 30 rotatably supported within the power extraction case 29.
is an intermediate shaft 33b rotatably supported within the case 29.
A gear 17 fixed to the planting PTO shaft 16 via a gear 19b fixed to and a gear 19a meshing with the gear 19b.
The gear 19a is rotatably supported on a fixed shaft 33a so as to protrude below the mounting surface of the power take-off case 29, and the gear 19a is supported by a fixed shaft 33a so as to be freely rotatable. and meshes with the gear 17 of the planting PTo shaft 16.

A mounting plate (frame plate) 34 whose lower side is fixed to the outside of the power mounting case 29 extends upward along the traveling direction of the aircraft, and the center line C of the mounting plate 34 in the longitudinal direction of the aircraft -C, by fixing the transmission case 35 located approximately in the middle in the vertical direction and the pump drive case 36 located above it, the power take-off portion 28 as shown in FIG. , the respective units of the transmission section 38 and the pump section 68, which will be described later, can be arranged in a well-balanced manner laterally with respect to the center line C-C in the longitudinal direction of the aircraft body.

The transmission case 35 includes an auxiliary transmission shaft 37, a main shaft 39,
The transmission shafts 40 are rotatably supported, and together constitute a transmission section 38 for changing the rotational speed of the fertilizer pump 12. A sprocket 41 (15 teeth) fixed to the outer shaft end passing through the mounting plate 34 of this sub-shift shaft 37
A chain 43 is wound around the sprocket 32 (12 teeth) fixed to the outer shaft end passing through the mounting plate 34 of the connecting shaft 30, so that the transmission section 38 and the power take-off section 28 are connected to each other. It is configured as a transmission mechanism section 58a for connecting and driving the units, and this transmission mechanism section 58a
is covered with a removable cover 72, but by replacing and fixing the sprocket 32 (12 teeth) to the auxiliary transmission shaft 37 and the sprocket 41 (15 teeth) to the connecting shaft 30, the amount of fertilizer applied can be adjusted. can be increased.

The pump drive case 36 has a first shaft 44 and a second shaft 4.
5 is rotatably supported, and a sprocket 46 fixed to the outer shaft end passing through the mounting plate 34 of the first shaft 44.
(15 teeth) and a sprocket 47 (15 teeth) fixed to the outer shaft end passing through the mounting plate 34 of the second shaft 45. A chain 49 is wound around the second shaft 45.
A chain 52 is attached to the sprocket 50 (15 teeth) fixed to the outer shaft end of the transmission shaft 40 and the sprocket 51 (15 teeth) fixed to the outer shaft end through which the mounting plate 34 of the transmission shaft 40 passes. is wrapped around the transmission section 38 and the pump section 68.
A transmission mechanism section 58b for connecting and driving each unit with
These transmission mechanism parts 58b are covered by a removable cover 73, but by replacing the sprocket 51 with one with 13 teeth, it is possible to plant seedlings with wider spacing. We are ready to respond.

A speed change gear 5 is slidably provided on the auxiliary speed change shaft 37.
3, the rotation speed of the main shaft 39 can be changed over a predetermined range by sliding on the sub-shift shaft 37 by operating the sub-shift lever 54. In other words, the main shaft 39
3 small diameter gear (21 teeth) gear 39d above the main shaft
(24 teeth) to rotate at low speed, and by meshing the large diameter gear (26 teeth) of transmission gear 53 to gear 39e (19 teeth) on main shaft 39, high speed rotation can be achieved. .

In addition, a speed change gear 55 is provided on the speed change shaft 40 so as to be slidable only.
The rotational speed of the first shaft 44 can be changed over a predetermined range by sliding on the speed change shaft 40 by operating the speed change lever 56. In other words, the speed change shaft 40 is connected to the speed change gear 55
A large diameter gear (25 teeth) is attached to the gear 39a on the main shaft 39.
By meshing with the gear 39b (number of teeth: 19) on the main shaft 39, the gear is shifted to 2nd speed. ) is meshed with the gear 39e (21 teeth) on the main shaft 39 to shift to 3rd speed, and by meshing with the gear 39d (24 teeth) on the main shaft 39 to shift to 4th speed. The discharge amount of 68 can be finely adjusted.

In this way, each transmission gear 53.5 constituting the transmission section 38
5 and each gear 39a on the main shaft 39 in which these mesh with each other.
By setting the number of teeth ~39e, it has a fixed position stopping mechanism (not shown) that stops the planting rod 6 over a predetermined range in the upper part of its motion trajectory (elliptical trajectory) when the planting clutch is disengaged. Even in a rice transplanter, the speed change operation of the speed change section 38 can be easily performed by moving one or more gear teeth within the play range of the fixed position stop mechanism.

The auxiliary speed change lever 54 and the speed change lever 56 can be operated from the rear side of the machine by opening and closing an opening/closing lid 74 provided at the rear side of the hood, and the discharge amount of the fertilizer pump 12 can be easily adjusted.

On the outside of the pump drive case 36, a first screw pump 59 is connected concentrically to the first shaft 44 through a joint 48 through a pump chamber 57 having a predetermined width, and a first screw pump 59 is connected to the second shaft 45 through a joint 48. A pump case 65 is provided with a second screw pump 60 concentrically connected to each other and a fertilizer pump 12 having two threads as a constituent unit.
A screw shaft 12a in which a screw-like recess is formed and the screw 1
The pump body 12b is composed of a rubber pump body 12b having a hole into which the pump body 2a is inserted, and a rubber connecting joint 12c to which the upstream side of the connecting pipe 15 is connected is provided on the discharge side of the distal end of the pump body 12b. ing.

The material constituting the pump chamber 57 is integrally formed of synthetic resin, and is formed into an elliptical cylindrical shape so as to have a size that communicates with the fertilizer pump 12 installed in parallel for two rows.
In the case of four-row fertilization shown in FIG. 3, a lower pump chamber 57 having two-row fertilization as a constituent unit is connected below an upper pump chamber 57 having two-row fertilization as a constituent unit. In other words, the upper pump chamber 57 communicates its fertilizer supply cylinder 57a with the fertilizer tank 11 via the suction hose 14, or directly connects the fertilizer supply cylinder 57a with the supply port 11a provided in the fertilizer tank 11 via the rubber seal 64. However, the inner diameter of the fertilizer supply cylinder 57a located at the lower stage and the outer diameter d of the lower connection 57b located at the upper stage are such that the inner diameter D>outer diameter d, so there is a rubber seal between the two cylinders. 64 can be interposed to make an airtight connection. In the lower pump chamber 57, by directly connecting the lower connection 57b remaining below to the drain hose 61, two rows of fertilization are used as a constituent unit, and small-capacity pump chambers 57 formed in the same shape are connected to each other in four rows of fertilization. It can be configured in the pump chamber 57.

This drain hose 61 has its lower end closed by a removable cap 62, and is normally stored laterally by being removably engaged with a hook 63 attached to the fuselage 2. By removing the long and bendable cap 62 from the fertilizer tank 63, the remaining amount of fertilizer can be easily discharged from the fertilizer tank 11 to the pump chamber 57, and the pump chamber 57 can be easily cleaned after work.

Inside this lower pump chamber 57, there is a pump drive case 3.
A first screw pump 59 and a second screw pump 60 are provided with a first shaft 44 and a second shaft 45 supported by a shaft 6, and are connected to the first shaft 44 and second shaft 45 through joints 48, respectively. and will be provided. A pump case 65 having the fertilizer pump 12 is attached to the outside of the lower pump chamber 57. A chain 49 is wound around a sprocket 46 fixed to the first shaft 44 in the lower stage and a sprocket 47 fixed to the second shaft 45, but a chain 49 is wound around a sprocket 50 fixed to the first shaft 44 in the upper stage and a sprocket 47 fixed to the second shaft 45 in the lower stage. The sprocket 50 fixed to one shaft 44 means both sprockets 50.50
The transmission shaft 40 is driven and rotated in the same direction by a sprocket 51 fixed to the transmission shaft 40 via a chain 52 wound around the transmission shaft 40 .

The pump chamber 57 which has the fertilization pump 12 of about 2 dye types can be used for 2-row fertilization when used alone, 4-row fertilization connected to 2 upper and lower tiers, or 6-row fertilization connected to 3 upper and lower tiers. but in any case,
The uppermost pump chamber 57 communicates its fertilizer supply cylinder 57a with the fertilizer tank 11 disposed directly above it via a short suction hose 14, or directly connects it to the fertilizer tank 1.
By communicating with the supply port 11a of pump chamber 5
When supplying fertilizer to the fertilizer tank 11, the air in the pump chamber 57 flows backward through the suction hose 14 or the supply port 11a and is released into the fertilizer tank 11. is omitted.

As shown in FIG.
b and a rubber gasket 65b fixed to the inner end surface 65a of the pump case 65, and the pump drive case 36 and the pump case 65 are arranged within a plurality of collars 66 that regulate the facing interval between them to a predetermined width. It is configured in an airtight state by being fastened with the respective mounting bolts 67 that pass through.

In addition, as shown in Fig. 3, in the case of 4-row fertilizer application arranged in upper and lower tiers, the collars 66 of the upper and lower tiers located on the lower right side
, 66 is provided, and the stay 69 whose upper end is fixed to this bracket 70 serves as the upper mounting seat 24. In the case of this four-row fertilization, two
The auxiliary bracket (required in case of row fertilization) 26a is removed and the upper mounting seat 24 is directly mounted to the mounting seat 26, and one side of the mounting seat 24 is bent and extended and is also used as a stay 69a. ing.

Further, a bracket 71 is fixed to the upper and lower three collars 66, 66, 66 on the left side, and the bracket 71 can be attached using the collar 66 that constitutes the pump chamber 57. It can be attached to the bonnet, etc. that covers the fuselage 2 using the .

As shown in FIG. 1, a virtual line connecting the connection shaft (output shaft) 30 of the power take-off section 28 and the auxiliary transmission shaft (input shaft) 37 of the transmission section 38 in side view is the auxiliary shaft as an input shaft. A transmission shaft (output shaft) 40 is disposed diagonally in the vertical direction with the transmission shaft 37 located at the rear, and a transmission shaft (output shaft) 40 is disposed at a distance rearward from the sub-transmission shaft 37, and a first shaft of the pump drive unit 68. (Input shaft) 44 is arranged diagonally in the vertical direction with the first shaft 44 located in front, so that the first shaft (input shaft) 44 is connected to (input shaft)
Since the series of transmission mechanisms 21 up to 44 are arranged in a "dog-shaped" shape in the vertical direction, they can be arranged compactly in a narrow space in the front and back direction.

Furthermore, by arranging the transmission mechanism 21 in a "dog-shaped" arrangement, there is a
Since the transmission case 35 containing the transmission part 38 can be disposed approximately horizontally, the connection shaft 30 on the lower side can be connected to the first shaft 4 on the upper side.
The height of the transmission mechanism 21 leading to the fertilizer pump 12 is lowered, and the height of the fertilizer pump 12 and the fertilizer tank 11 is accordingly lowered to lower the center of gravity of the entire fertilizer application device 10. Since the transmission case 35 and the transmission case 35 in which the transmission part 38 is housed are shifted in the front-rear direction without overlapping vertically, the drain hose 61 can be easily connected to the lower part of the pump chamber 57, and the amount of fertilizer remaining in the pump chamber 57 can be adjusted. can be easily taken out. Furthermore, since a wide space can be secured between the sub-shift lever 54 and the shift lever 56 provided above the shift case 35 and the lower part of the fertilizer pump 12, the sub-shift lever 54 and the shift lever 56 can be operated smoothly. It can be carried out.

Furthermore, the transmission mechanism 21 is arranged in a dogleg shape that protrudes rearward along the longitudinal plane, so that the transmission section 38 is located at a position away from the center of the traveling wheels 4, as shown in FIG.
A transmission mechanism section 58a1 that connects and drives the power take-off section 28 and the
Since the transmission mechanism section 58b that connects and drives the transmission section 38 and the pump section 68 can be provided, the fertilization device 10 can be installed without disturbing the front-rear balance of the machine, and the double-force bar 72. By attaching and detaching the sprocket 72, sprocket replacement and maintenance can be performed efficiently.

In addition, as shown in FIG. 5A, the first
The shaft 44 and the screw shaft 12a, and the second shaft 45 and the screw shaft 12
A stirring blade 76 for stirring the fertilizer may be fixed to the outer periphery of each joint 48, 48 that connects a. This stirring blade 76
is provided in a position that avoids the connecting pin.

Further, as shown in FIG. 5B, if a cover 77 covering the outer periphery or both sides of each joint 48 is fixed to the joint 48 and a stirring blade 76a is provided on the outer periphery of this cover 77, the connection The stirring blade 76 is not restricted by the pin.
Although the number of sheets in a can be larger than in the state shown in Fig. 5 A, the number of sheets in Fig. 5 C
As shown in FIG.
8, the fertilizer in the pump chamber 57 is transferred to the fertilizer pump 12.
It may have a spiral shape in the direction of pressure feeding toward the side.

In this way, by providing stirring blades using the joints 48 that connect the first shaft 44 and the threaded shaft 12a, and the second shaft 45 and the threaded shaft 12a, the fertilizer can be stirred within the pump chamber 57. Therefore, even paste-like fertilizer with high viscosity and poor fluidity can be reliably sent to the fertilizer pump 12, thereby preventing fertilizer clogging caused by precipitation of particles and crystals in the fertilizer in the pump chamber 57. , stable fertilization is possible.

〔Effect of the invention〕

As explained above, the present invention provides a fertilizer dispensing section for dispensing the fertilizer in the fertilizer tank to a fertilizing section, and a variable speed drive for this fertilizer dispensing section. A transmission section that drives the transmission section and a power take-off section that drives this transmission section are arranged in the vertical direction, and the fertilizer feeding section located at the top is connected to the power take-off section located at the bottom via the transmission section located approximately in the middle. Because the machine is driven by a frame plate parallel to the direction of travel, the fertilizer dispensing section located at the top, the transmission section located approximately in the middle, and the power take-off section located at the bottom are arranged vertically on the frame plate parallel to the direction of travel. By doing so, the transmission mechanism that drives the fertilizer dispensing section from the lower power take-off section can be disposed compactly within a narrow space in the front-rear direction.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an enlarged side view of the main parts, Fig. 2 is a plan development view of the transmission, and Fig. 3 shows a state in which two pump chambers are connected vertically. FIG. 4 is an overall side view of a walk-behind rice transplanter equipped with a fertilization device, and FIGS. 5A to 5C are developed plan views showing a joint inside a pump chamber. DESCRIPTION OF SYMBOLS 1... Rice transplanter, 10... Fertilizer application device, 11... Fertilizer tank, 12... Fertilizer pump, 13... Fertilizer nozzle, 15... Connecting pipe, 16... Planting PTO axis ,2
8... Power take-off part, 29... Power take-off case, 30
...Connection shaft (output shaft), 34...Mounting plate (frame plate), 35...Shift case, 36...Pump drive case 36.37...Sub-shift shaft, 38...Shift gear Part, 3
9...Main shaft, 40...Shift shaft, 44...First shaft (
input shaft), 45...second shaft, 58a...transmission mechanism section, 58b...transmission mechanism section, 65...pump case 6
5.68... Pump section (fertilizer feeding section). Applicant Mitsubishi Agricultural Machinery Co., Ltd. Agent Patent Attorney Shin Ogawa −

Claims (1)

[Claims] A fertilizer dispensing section for dispensing the fertilizer in the fertilizer tank to a fertilizing section, a transmission section for driving the fertilizer dispensing section at variable speeds, and a transmission section for driving this transmission section are mounted on a frame plate provided on the machine below the fertilizer tank and parallel to the traveling direction. A drive structure for a fertilizer dispensing device in which the power take-off section is vertically connected.