JPH0365102A - Working machine of mobile farm machine - Google Patents

Abstract

PURPOSE:To facilitate the connection of a working machine and to reduce the weight of the machine by integrally forming a tool bar of a working machine and a frame to support various apparatuses and connecting the tool bar and a link mechanism with a pin in a freely detachable and rollable state. CONSTITUTION:A pin member 31 of a bracket 30 attached to a parallel link is inserted into an engaging hole 41 of a tool bar 40 of a working machine. The bracket 30 is connected to the tool bar 40 by inserting a fixing tool into a hole 31a of the pin member protruded at the back of the tool bar 40. The working machine can be rolled around the pin member 31 of the bracket 30 and is maintained in almost parallel to the ground by the action of a spring member.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a working machine for a mobile agricultural machine, and more particularly to the structure of a working machine for fertilizing, weeding, pest control, etc.

(B) Conventional technology Conventionally, a tool bar for attaching each device as a working machine was provided at the end of the link mechanism for lifting and lowering the working machine on the main body of the mobile agricultural machine.When installing the working machine on the main body of the mobile agricultural machine,
Each device was attached to this toolbar with bolts. Further, the working members of a working machine are generally disposed at the lower rear of the working machine.

(c) Problems to be solved by the invention For this reason, in the case of a work machine that includes a large number of transmission devices and electrical components, there are many mounting points, the structure is complex, and installation is time-consuming, and bolts, nuts, etc. Installation requires an increase in the number of parts, which increases the weight of the machine as a whole, and since the work parts are located at the rear and lower part of the machine, a large amount of moment is applied to the main body of the farm machine when the machine goes up and down. There was a risk that the balance of the aircraft would be lost.

SUMMARY OF THE INVENTION Therefore, the present invention provides a working machine that can be easily attached to a mobile agricultural machine and that takes into account the weight reduction of the working machine itself and its center of gravity, thereby solving the above-mentioned problems. The purpose is to provide

(d) Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances, and for example, as shown with reference to FIGS. 1 and 2, mobile agricultural machinery (1)
The working machine (16) is attached to the agricultural machine (1) and is movable up and down via the link mechanism (15) by the operation of the hydraulic cylinder (17) provided on the main body of the agricultural machine (1).
) and the frames (43) and (45) k on which each device of the working machine (16) is disposed are integrally formed, and the tool bar (40) and the link mechanism (15) are integrally formed.
) is connected to the frame (4
3) is characterized in that a working member (6Q) is provided.

(E) Work based on the structure above! To assemble (16),
A frame (43) integrally formed with a toolbar (40)
) and (45), each device of the working machine (16) is attached, and in particular, the working member (60) of these devices is attached to the frame (43) located below the tool bar (40). In this way, the working machine (16) is almost completely assembled before being attached to the mobile agricultural machine (1). Then, in order to attach the working machine (16) to the agricultural machine (1),
A link mechanism (15) operated by a hydraulic cylinder (17) provided on the main body of an agricultural machine (1) and a tool bar (40) are simply connected by a pin member (31) located in the longitudinal direction of the machine. Then, when the hydraulic cylinder (17) of the mobile agricultural machine (1) is operated, the working machine (16) moves to the agricultural machine (1).
) This means that the main body can go up and down without losing its balance.

Note that the symbols in parentheses are used to refer to the drawings and do not limit the structure in any way.

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

As shown in FIGS. 5 and 6, the management machine 1 has wheels 2,
It has a rectangular fuselage frame 5 in plan view whose four corners are supported by wheels 2 and wheels 3, 3, and a pivot shaft 6 disposed in the center of the fuselage frame 5 is capable of horizontal rotation. A freely rotating frame 7 is provided. A stick 10 is attached to one end of the rotating frame 7 via a link 9, and one end of a hydraulic cylinder 13 installed on the rotating frame 7 is connected near the rotating base of the link 9. ing. Moreover, at the other end of the rotating frame 7,
A fertilizer application machine 16 is attached to the three-point link 15 consisting of a top link 15a and a lower link 15b so as to be able to move up and down, and as shown in FIG. It is connected to a lift arm 19 fixed to the top link 15a of the point link 15.

The lift arm 19 is made of a substantially U-shaped metal plate, and the upper part of the O-shape is fixed to the end of the top link 15a. Furthermore, an engaging member 19a that engages with the cylinder arms 17a and 17b of the hydraulic cylinder 17 is provided at the bottom of the 0-shape, and the engaging member 19a is configured to be rotatable with respect to the lift arm 19. ing.

Further, the cylinder arms 17a and 17b have their base portions 1
7b is thicker in diameter than the tip portion 17a, and when the hydraulic cylinder 17 is operated and the arm portion is extended, the stepped portion pushes the engagement member 19a of the lift arm 19, thereby lifting the top link 15a upward. Rotate to. Further, the top link 15a is provided with a spring 15 that urges the link 15a to be lifted toward the management machine main body 1 side.
C is attached, and the top link is configured to be slightly shorter than the lower link 15b.

On the other hand, as shown in FIG. 5 or 6, the rotating frame 7
A fertilizer tank 20 is placed in the center of the frame 7 so as to sandwich the frame 7 therebetween.
．． 20 is installed, and the fertilization tank 20.20
is sending paste-like fertilizer to the fertilizer application machine 16 via a hose. Further, below the fuselage frame 5 in a side view, an engine 23, a constant displacement hydraulic pump 24, a transmission, a solenoid valve 26, a control section 27, a battery 29, etc. are suspended in a state where they are respectively disposed on a plate 21. There is.

On the other hand, as shown in FIGS. 2 and 3, the fertilizer application machine 16 is mounted so as to be swingable in the left-right direction by a bracket 30 provided at the tip of the three-point link 15, and is attached to the hydraulic It can be raised and lowered by a cylinder 17. As shown in FIG. 1, in the bracket 30, a cylindrical bottle member 31 projects from above the front of a rectangular parallelepiped member 35, and a hole 31a is provided near the tip of the bottle member. Further, from the front lower side of the rectangular parallelepiped member 35 to the lower side, the frame (gauge wheel supporting member) 36
is fixed in an extended state, and holes 36a and 36b are provided above and below near the tip of the frame 36. Further, the upper side surface of the rectangular parallelepiped member 35 has a substantially triangular hole 32a on the side in which the top link 15a engages.
An arm member 32 provided with is fixed on the left and right sides, and a cylindrical arm member 33, which is engaged with the lower link 15b, protrudes left and right from the lower side surface of the rectangular parallelepiped member 35. The arm member 33 has a tapered diameter at its tip,
It engages with a hole provided near the tip of the lower link 15b. Then, the fertilizer application machine 16 (first
As shown in the figure, the tool bar 40 has a hole 41 in the center thereof which engages with the bin member 31. The tool bar 40 has four nozzle frames 43 projecting downward.
is installed, and holes are provided in the lower part thereof extending from top to bottom. Furthermore, a frame 45 is installed in a U-shape at a right angle to the nozzle frames 43 at the center in a plan view. Moreover, above the frame 45 in side view,
As shown in FIG. 2, a transmission section 50 such as a constant displacement hydraulic motor 51 and a continuously variable transmission 52 is installed.

On the other hand, various devices are disposed on the nozzle frame 43 as working members 60. That is, an upper crankshaft 61 is rotatably supported slightly below the center of the toothpick and nozzle frame 43 shown in FIG. 2, and a lower crankshaft 67 is rotatably supported below it. The upper crankshaft 61 has a large diameter sprocket 62. A small diameter sprocket 63 is attached to each. Further, each of the upper crankshafts 61 has one
Crank arms 65a and 65b are provided with a phase difference of 80 degrees, the length of each can be adjusted by a predetermined amount, and is fixed with a screw 66. Similarly, the crank arms 69a and 69 are also attached to the lower crankshaft 67.
b is provided. And upper crank arm 65
A fertilizer pipe 71 is pivotally connected to the tip of each of the upper crank arm 89a and the lower crank arm 89a.
5b and the tip of the lower crank arm 69b as well.
2 are pivotally connected. These crank arms 65a, 6
5b, 69a, and 69b constitute a parallel rank mechanism. In addition, the fertilization pipe 71 and the lower crank arm 69a
, as well as the fertilization pipe 72 and the lower crank arm 6
A flexible mechanism 73 is interposed in each pivot portion 9b. These accommodation mechanisms 73 are configured so that the fertilizing pipe 71 (or the fertilizing pipe 72) can freely swing back and forth in the traveling direction. Further, as described above, a frame (gauge wheel support member) 36 is fixed to the bracket 30 in a downwardly extending manner.
At the upper and lower ends of the frame 36, one ends of links 81a and 81b forming a parallel link 80 are pivotally supported in the holes 36a and 36b of the frame 36. Further, a support member 82 is attached to the other end of the parallel link 80 and extends downward. Also, a gauge wheel 83 is provided below the support member 82.
is attached and rotates as the aircraft body 1 moves.

Further, the link 81a is attached to the rotation base of the link 81a.
A potentiometer 85 is installed to measure the amount of vertical rotation of the three-point link 15 based on the measured value.
The soil insertion depth at the tip of the fertilizing pipe 71 (72) is controlled to be constant by raising and lowering the fertilizing pipe 71 (72).

On the other hand, a hexagonal counter shaft 55 is rotatably supported by a bracket 54 provided on the nozzle frame 43 in the width direction of the fertilizing work PI 116, and a small diameter sprocket is attached to the shaft 55. 105 and a large diameter sprocket 104 are installed. The continuously variable transmission 52 is constructed by winding an endless belt 57c between a driving side split pulley 57a and a driven side split pulley 57b, and the driving side split pulley 57a is connected to an electric motor for continuously variable speed control. By appropriately operating the speed change cam 53, the pulley width is changed, and the endless belt 57c is moved to the inner and outer circumferential sides to change the transmission ratio.

Further, as shown in FIG. 2 or 3, a paste pump 58 and a distribution valve 59 are installed below the bracket 45, and the distribution valve 59 is connected to the fertilization pipe 71 and the distribution valve 59 described above.
... and the number of fertilizing pipes 72... (eight) have a number of outflow vibrators 59a, each of which communicates with the upper end opening of each fertilizing pipe via a flexible hose. They are connected, and when the fertilizing pipes 71 and 72 are respectively inserted to the lowest position in the soil, a certain amount of fertilizer is discharged from the outlet at the lower end of the fertilizing pipes 71 and 72.

On the other hand, the constant capacity hydraulic pump 24 is installed on the downstream side of the transmission of the engine 23 and is driven by the rotation of the engine 23 after passing through the suspension. The amount of oil that increases or decreases in proportion to the traveling speed can be sent to the constant capacity hydraulic motor 51 via the hydraulic hose, and therefore the driving speed of the hydraulic motor 51 increases or decreases in conjunction with changes in the traveling speed of the management machine 1. It is configured as follows. Furthermore, the hydraulic motor 51 has a large diameter sprocket 1.
01 and a small diameter sprocket 102, and the power is transmitted from the small diameter sprocket 102 to a countershaft 55 via a transmission chain and a large diameter sprocket 104.
From the shaft 55, the signal is transmitted to the upper crankshaft 61 via the small-diameter sprocket 105 and the transmission chain, and is also branched and transmitted to the distribution valve 59 via the sprocket 106 and the transmission chain.

Therefore, the horizontal rank mechanism and the distribution valve 59 allow the rotation of the hydraulic motor 51, which changes the drive speed in conjunction with the change in the running speed of the management machine 1, to reach a predetermined rank via the transmission chain and sprocket, respectively. Since it is transmitted while being held, each drive speed changes in conjunction with the traveling speed of the management machine 1.

Further, a transmission chain is wound between the large-diameter sprocket 101 and the sprocket 107, so that the driving force of the constant displacement hydraulic motor 51 is transmitted to the drive-side split pulley 57a, that is, the continuously variable transmission 52. It has become. The rotation transmitted to the driven side split pulley 57b by the endless belt 57c is transmitted to the sprocket 109, that is, the paste pump 58, via the small diameter sprocket 110 and the transmission chain. In addition, 112 in the figure is a cover for protecting the transmission part 50. In addition, work machine sleds 76 are attached to both outer frame members 43 via support members 75, and the work machine 16 can follow the field surface without being affected even if the management machine 1 is tilted. At the same time,
When it rises, a spring (not shown) causes the tool bar 4 to
0, that is, the fertilizer application machine 16 is kept horizontal.

Further, an operation panel box 90 and a display panel box 91 for controlling the work machine are provided at the rear front of the work machine so as to be covered by a cover 112 provided on the top of the toothpick and transmission part 5o shown in FIG.

Since this embodiment has the above-described configuration, when fertilizing the rice plants planted in the field, first the working machine 1
6 is attached to the management machine 1, and the bin member 31 of the bracket 30, which is attached to the parallel link 15, is attached to the work machine 1.
The hole 31 of the bottle member is inserted into the engagement hole 41 provided in the tool bar 40 of No. 6 and protrudes to the rear of the tool bar 40.
Connect the bracket 30 and the tool bar 40 by inserting a stopper into a. In this state, the working machine 16 can be low-linked around the bin member 31 of the bracket 30, and is configured to be substantially parallel to the ground by means of a spring member (not shown).

By turning on the running latch, the management machine 1 is moved to the work start position on one headland, supplies fertilizer to the fertilizer tank 20, 20 at that position, and runs toward the other headland.

Then, in the fertilizer application machine 16, the hydraulic pump 24
From a hydraulic motor 51 driven by pressure oil pumped from
Power is transmitted via the large diameter sprocket 104 to the countershaft 55 via the transmission chain, and then to the upper crankshaft 61 of the parallel crank mechanism via the small diameter sprocket 105 and the transmission chain, and then to the lower crankshaft via the transmission chain. 67 and these upper crankshafts 6
1 and the lower crankshaft 67 are rotated counterclockwise in FIG. As a result, the crank arms 65a, 6
5b and the crank arms 69a, 69b rotate in the same direction, and the fertilizing pipes 71, 72 rotate while maintaining substantially vertical states with a phase difference of 180 degrees. In this case, cranks 65a, 69a and crank 8
By changing the lengths of 5b and 69b, as shown in Figure 2, in the case of crank length A, the position is moved to the depth indicated by the white circle in the soil, and in the case of crank length B, it is moved to the depth indicated by the black circle. In the same position, the depth of fertilizer injection can be made into two stages even in the same row. Note that the same effect can be achieved by changing the length of the fertilizing pipes 71 and 72 instead of making the crank length variable.

Furthermore, the power from the hydraulic motor 51 is transmitted to a continuously variable transmission device 52.
The fertilizer sucked from the fertilizer tank 20 through the hose is sent from the paste pump 58 to the distribution valve 59 because it is transmitted to the paste pump 58 via the driven side split pulley 57a and the transmission chain. Then, the fertilizer flows out from the distribution valve 59 through the pine 59a and the flexible hose to the fertilization pipe 71.7.
2. Fertilization pipe 71
．． Fertilizer is discharged from the tips of the fertilizing pipes 71 and 72 below the rice field near where the tips of the fertilizing pipes 71 and 72 are at the lowest position.

When the machine body 1 heads up due to unevenness of the tiller in the field while fertilizing work continues, the cylinder arm 17a of the hydraulic cylinder 17 becomes thinner as shown in FIG. Since the sled 76 is not pressed against the other surface, damage to the sled 76 can be prevented. Normally, the depth of the fertilizing pipe 71, 72 is controlled by a gauge wheel 83.
This is done by controlling the hydraulic cylinder 17 with the value of the potentiometer 85 installed in the link part of the machine. However, since a dead zone is provided, the hydraulic cylinder 17 is delayed due to a sudden head-up of the machine body 1, causing the work machine to Since there was a risk that the sled 76 would be damaged by pressing the sled 6 against the other surface, it was decided to act as described above.

Also, when raising the work equipment 16 on a headland etc., the top link 15a is configured to be shorter than the lower link 15b, so the work equipment 16 rises to be positioned above the machine 1, which improves the balance of the machine 1. Or not easy to collapse. Furthermore,
Since a spring 15C is attached to the top link 15a so as to lift it up toward the machine body 1 side, the working machine 16 can be easily raised, and the force that presses the working machine 16 against the field surface can be reduced even when the machine body 1 is headed up. There is.

Furthermore, in the past, the operation panel, display panel, etc. that control the work machine 16 were often not covered for convenience of use, but as in this work machine 16, the operation panel box 90 and display panel box 91 are Since it is disposed at the rear front and in a position covered by the cover 112 that covers the upper part of the working machine 16, it is easy to check from the rear, and there is no need to provide a new cover.

(g) As described in detail, according to the present invention, the tool bar (40) of the working machine (16) and the frame (40) on which each device is arranged.
3) and (45) are integrally formed, and the toolbar (
40) and a link mechanism (15) that raises and lowers the working machine (16).
The connection with the work machine (
16) can be reduced in weight, and can be easily attached to and detached from the mobile agricultural machine body (1).

In addition, since the work member (60) of the work machine (16) is arranged on the frame (43) located below the tool bar (40), the work machine (16) is mounted on the moving layer a (1). In this case, the center of gravity of the work machine (16) approaches the main body of the mobile agricultural machine (1), so when the machine (1) pitches, the center of gravity of the work machine (16)
) can be maintained stably, and when raising and lowering the work machine (16), the moment acting on the main body of the agricultural machine (1) can be reduced. Can be held stably.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a tool bar of a working machine according to the present invention and a bracket that engages with the tool bar, Fig. 2 is a schematic side view of the working machine, Fig. 3 is a schematic plan view of the working machine, and Fig. 4 is a hydraulic pressure FIG. 3 is a diagram showing the lifting and lowering state of the working machine due to the operation of the cylinder. Figure 5 is a schematic side view of a mobile agricultural machine equipped with a working machine.
FIG. 6 is a schematic plan view of a mobile agricultural machine equipped with a working machine. 15... Link machine (fertilizer) 30... Bracket, 40... Tool bar (nozzle frame) 60... Work member 1... Mobile agricultural machine (management machine) structure, 16... Work machine 17 ... Hydraulic cylinder 31 ... Pin member 43 ... Frame 45 ... Frame

Claims (1)

[Scope of Claims] 1. A working machine that is attached to a mobile agricultural machine and can be raised and lowered via a link mechanism by the operation of a hydraulic cylinder provided on the main body of the agricultural machine, comprising a tool bar of the working machine and each part of the working machine. A frame on which the device is disposed is formed integrally with the tool bar, and the link mechanism is connected to the tool bar by a pin member extending in the longitudinal direction of the machine body, and is configured to be detachable and rollable;
A working machine for a mobile agricultural machine, characterized in that a working member is arranged on a frame located below the tool bar.