JPH0746923A - Fertilizer-applying machine - Google Patents

Abstract

PURPOSE:To provide a fertilizer-applying machine preventing the action of a larger load on a lifting link device than a necessary load by placing heavy parts on a hitch member. CONSTITUTION:A fertilizer-applying machine 1 detachably attached to the rear part of a travel frame through a lifting link device 7 comprises arranging a gear case 25, a counter shaft 27 and a driving shaft 29 for transmitting a power from a PTO shaft 26 to a fertilizer-applying section 5 on a hitch member used for mounting the fertilizer-applying machine 1 on the linking part of the link device 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fertilizer application machine, such as a fertilizer sowing machine, which is towed by a work vehicle such as a rice transplanter to perform fertilizer application, and more particularly to a structure near a hitch portion thereof.

[0002]

2. Description of the Related Art In general, fertilizer applicators include those that evenly distribute fertilizer in a field, those that inject streaks in the field, and those that inject dots at the seeding part. In addition, from the viewpoint of environmental protection, a method of injecting dots (hereinafter referred to as a dot) is drawing attention. Then, the applicant of the present invention, for example, detachably attach a fertilizer application machine such as a fertilizer sowing machine to the connecting portion of the lifting link device arranged at the rear of the body of the riding rice transplanter, and pulling to the riding rice transplanter, We proposed a method in which fertilizer such as paste was infused and seeded in the infused portion.

[0003]

In the fertilizer sowing machine described above, a heavy load such as a gear case for transmitting power from the PTO shaft to the fertilizer application unit, a drive shaft for driving the fertilizer application unit, and a counter shaft is used. When the fertilizer sowing machine is moved up and down by the link device, the link device is arranged at a distance from the hitch part connected to the connecting part of the elevating link device, and the link device has a distance apart from the connecting part. A moment acts and a force greater than the weight of the fertilizer application planter acts. Therefore, a large amount of hydraulic pressure is required for the hydraulic actuator of the lifting link device, and there is a risk that a load larger than the capacity of the hydraulic actuator of the passenger rice transplanter, which has a relatively small capacity, may be applied. Therefore, an object of the present invention is to provide a fertilizer application machine in which a heavy load is arranged in the hitch portion so that an unnecessary force does not act on the lifting link device.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. For example, referring to FIGS. 1 and 2, an elevator link device (7) is provided at the rear part of the traveling machine body. Fertilizer working machine (1) that is detachably mounted via
At the hitch part (10) for attaching the fertilizer application machine (1) to the connecting part (51) of the link device (7), the PTO
It is characterized in that a gear case (25) for transmitting power from the shaft (26) to the fertilizer application section (5), a counter shaft (27) and a drive shaft (29) are arranged.

[0005]

According to the above construction, the fertilizer application machine (1) has the hitch part (10) attached to the connecting part (51) of the lifting link device (7) at the rear of the traveling machine body, so that the P
Power from the TO shaft (26) is transmitted to the gear case (25), and further from the gear case (25) to the fertilizer application section (5) via the counter shaft (27) and the drive shaft (29). Fertilization work is performed. Then, even if the fertilizer application machine (1) is moved up and down by the link device (7), the hitch part (1) of the fertilizer application machine (1) is
Since the gear case (25), the counter shaft (27) and the drive shaft (29) are arranged in (0), a large moment is not generated in the link device (7).

[0006]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the fertilizer application machine 1 has connecting frames 2 and 2 extending in the traveling direction, and a drive section 3 and a fertilizer section 5 are arranged in front of the frames 2 and 2. A seeding section 6 is arranged at the rear of the frames 2 and 2. The fertilizer application machine 1 is connected to the rear of the traveling machine body of a working vehicle, for example, a passenger rice transplanter (not shown), and the top links 7a of the machine body are two lower links 7b.
It is supported so as to be able to move up and down by an ascending / descending link device 7 composed of parallel links having 7b. As shown in FIG. 2, a subframe 9 orthogonal to the frames 2 and 2 is fixedly provided on the front side of the frames 2 and 2, and a hitch portion 10 is provided at a lower front portion of the subframe 9. Is installed. The hitch portion 10 has plates 11 and 1
1 are fixed so that they face each other, and these plates 11, 1
A locking shaft A is fixedly installed above the space 1 and a locking shaft C is fixedly installed below the space between the plates 11 and 11 by penetrating the connecting holder 12.

Further, as shown in FIGS. 4 to 6, an attachment portion 51 is installed at the rear end of the lifting link device 7 described above, and the attachment portion 51 is arranged so as to sandwich the top link 7a. Has plates 52, 52
A tube shaft 53 that rotatably penetrates and supports the top link 7a is fixed to the plates 52, 52 with bolts or the like.

A receiving member 55 having an opening is fixed above the plates 52 and 52 so as to receive the locking shaft A of the hitch portion 10, and below the plates 52 and 52 is the plate 52. , 52 are provided to extend left and right through fixed shafts B, and brackets 56, 56 are fixed to both ends of the fixed shaft B. The brackets 56, 5
A rotation shaft is projected to 6 and the lower links 7b, 7b are rotatably connected to the shaft as a support shaft. A locking shaft C of the hitch portion 10 is provided at a lower rear portion of the plates 52, 52.
R-shaped receiving portions 52a, 52a are formed to receive the R-shaped receiving portions. Then, the receiving portion 52 of the plates 52, 52
Hook plates 57 and 57 are rotatably supported near a and 52a, and the plates 57 and 57 are engaged with the locking shaft C by operating a hook locking device 59.

Further, as shown in FIGS. 2 and 3, a holding member 13 is fixedly provided on the rear surface side of the locking shaft C below the hitch portion 10, and the holding member 13 is provided with a square frame 15. Installed. A sled holder 16 is slidably arranged on the left and right of the rectangular frame 15, and a sled 17 is supported on the holder 16 so as to be movable in the vertical direction and fixed by removing and inserting a locking pin 19. Further, the sled holder 16
A gauge device 20 is attached to the left and right outer sides of the holder 20, and the device 20 has a gauge holder 23.
3, a gauge wheel 22 that is rotatable with respect to the ground surface is supported by the handle 21 so that the wheel 22 can be lifted and lowered.

A gear case 25 of the drive unit 3 is attached to one side of the plate 11 of the hitch portion 10, and the gear case 25 is projected from the machine body.
The power of the TO shaft 26 (see FIG. 1) is decelerated, and the power is transmitted through the sprocket and the chain to the counter shaft 2
7, and is transmitted to the first drive shaft 29 via the chain. The counter shaft 27 is disposed above the gear case 25, and the first drive shaft 2
9 is behind the counter shaft 27 and the sub-frame 9
Is located below it. A bracket 28 is fixed to the front portion of one side of the subframe 9,
The counter shaft 27 is rotatably supported by the bracket 28. Bearing support members 34, 34 are fixed to the lower surface of the sub-frame 9, and the first drive shaft 29 is rotatably supported by the support member 34.

Two distribution valves 30 and 31 are fixed to the upper surface of the sub-frame 9 via brackets 38 and 38 so as to face each other, and the distribution valves 3
0 and 31 are connected to each other by a connecting shaft. And
As shown in FIG. 7, the power from the drive unit 3 is applied to the chain 61.
Is transmitted to the counter shaft 27 via the chain, and the power from the shaft 27 is transmitted to the first drive shaft 29 via the chain 62. Further, the power from the shaft 29 is transmitted to the connecting shaft of the distribution valves 30 and 31 via the chain 63, and the power from the shaft 29 is transmitted to the second drive shaft 32 via the chain 65. .

As shown in FIGS. 2 and 3, fertilizer application portions 5, 5 are disposed on both sides of the first drive shaft 29, and the fertilizer application portion 55 has chain cases 33, 33.
have. The chain cases 33, 33 are rotatably supported about the drive shaft 29, and a holding bracket 66, is provided at a lower portion of the chain cases 33, 33.
66 is fixed. The brackets 66, 66 are fixed to the sled holder 16 with a withdrawal pin, and when the fertilizer application section 5 is not used, the holding bracket 66 and the sled holder 1 are used.
A holding member is interposed between 6 and the fertilizer application section 5 can be folded and stored. The chain case 3
Crank shafts 35, 35 are rotatably supported on the shafts 3, 33. Crank arms 36, 36 are fixedly mounted on the crank shafts 35, 35, and the fertilizer nozzles 37, 37 are attached to the arms 36, 36. Are rotatably connected. The fertilizer application parts 5 and 5 are rotated by the crank shafts 35 and 35 of the chain cases 33 and 33 to rotate the crank arm 3
The nozzles 37, 37 move up and down via 6, 36,
It is configured to inject fertilizer into the ground.

In the fertilizer application section 5, as shown in FIGS. 2 and 3, a large number of collars 39 are inserted into the first drive shaft 29 so as to sandwich the chain cases 33, 33, respectively. The collar 39 is secured by a washer, and the chain case 33 is fixed by a bolt so that the chain case 33 can be freely rotated. By changing the insertion arrangement of these collars 39, the fertilization interval can be adjusted.

On the other hand, the seeding section 6 has a seeding frame 43 supported by the rollers 41 and 42.
The nozzle portion 45 is disposed on the upper part of the. Then, the power from the second drive shaft 32 is transmitted through the sprocket and the chain to the nozzle shaft 46 in the nozzle portion 45.
Have been transmitted to. A large number of nozzles 47 are radially fixed to the nozzle shaft 46, the nozzles 47 suck the seeds in the seed hopper 49 with a vacuum pump 50, and then the seeds are seeded with the nozzles 47. Is.

Since the present embodiment has the above-mentioned structure, when the fertilizer application machine 1 is mounted on the traveling machine body for performing fertilizer application work, etc., the fertilizer application machine 1 in a stationary state is first.
The attach portion 51 of the link device 7 of the traveling machine body is brought closer to the hitch portion 10 of the vehicle. In this state, when the lifting link device 7 is slightly lifted so that the locking shaft A of the hitch portion 10 is received by the receiving member 55, the fixed shaft B of the attachment portion 51 is received.
Rides on the connection holder 12 of the hitch portion 10. Then, by operating the hook locking device 59 of the lifting link device 7, the hook plates 57, 57 are locked to the locking shaft C, and the mounting work is completed.

During fertilizer application, the power from the PTO shaft 26 is decelerated in the gear case 25, the reduced power is transmitted to the counter shaft 27, and the power from the shaft 27 is further transmitted to the first drive shaft. 29 is transmitted. Then, the power from the drive shaft 29 is transmitted to the fertilizer application section 5 as well as to the second drive shaft 32, and then to the seeding device 43 of the seed section 6 for fertilization and sowing work. Is done.

Since heavy objects such as the gear case 25, the counter shaft 27, the drive shaft 29, and the chain case 33 are concentrated in the vicinity of the hitch portion 10 of the fertilizer application machine 1, the lifting link device 7 has the above-mentioned structure. Since the momentum due to the heavy object is small, the hydraulic actuator that operates the link device 7 does not require a large amount of hydraulic pressure, and it is not necessary to reinforce the upper link 7a and the lower link 7b of the lifting link device 7.

Further, the gear case 2 is attached to the hitch portion 10.
By arranging 5, the gear case 25 and the PTO shaft 26 of the traveling machine body approach each other, so that the power transmission member (for example, coupler or flexible joint) from the PTO shaft 26 to the gear case 25 can be shortened. The power transmission efficiency is improved, and the weight can be reduced by shortening the member.

[0019]

As described above, according to the present invention, the hitch portion (10) of the fertilizer application machine (1) has the gear case (2).
5), counter shaft (27) and drive shaft (2)
Since heavy objects such as 9) are concentratedly arranged, lifting work can be performed without generating a large moment in the link device (7), and the hydraulic actuator of the link device (7) can be operated. Does not require large hydraulic pressure. Further, since the force due to the moment does not act on the link device (7), it is not necessary to reinforce the link portion. The reference numerals in parentheses refer to the drawings and do not limit the configuration in any way.

[Brief description of drawings]

FIG. 1 is a side view showing a fertilizer application machine to which the present invention is applied.

FIG. 2 is a perspective view showing a front side portion of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing a lifting link device.

FIG. 5 is a plan view showing a lifting link device.

FIG. 6 is a rear view showing the lifting link device.

FIG. 7 is a power transmission diagram of the fertilizer application machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fertilizer application machine 7 Lifting link device 10 Hitch part 25 Gear case 26 PTO shaft 27 Counter shaft 29 Drive shaft 51 Attaching part (connecting part)

Claims (1)

[Claims] 1. A fertilizer application machine removably attached to a rear part of a traveling machine body through a lifting link device, wherein a hitch portion for attaching the fertilizer application machine to a connecting portion of the link device is provided with a P
A fertilizer application machine comprising a gear case, a counter shaft and a drive shaft for transmitting power from the TO shaft to the fertilizer application section.