JP2003219710A - Seeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seeder capable of changing a distance between sowing spots correctly with a transmission and keeping an accurate seeding state by solving a defect such that although conventionally there is a seeder driving a seeding device of a seeding type by an electric motor independent from the transmission of a travelling device, such seeding device in general, by high speed rotation of the seeding part, a prescribed number of seeds are delivered in a high speed and thrown toward the surface of the soil, it is necessary to change and adjust the number of rotations of the electric motor according to the traveling speed of the vehicle, but it is difficult to keep the seeding speed as constant, and the seeding becomes close to a line-sowing in spite of using a spot-sowing style. <P>SOLUTION: This constitution of the seeder is characterized by installing a seeding interval-switching device 4 for changing the seeding interval at a sowing transmission device 3 for transmitting the traveling device with the seeding device of the seeding style as coupled. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a point seeder,
It can be used for spot seeding devices such as flooded direct seeders.

[0002]

2. Description of the Related Art A seeding device of a point sowing type has a power transmission structure in which it is driven by an electric motor independent of the power transmission of a traveling device (Japanese Patent Laid-Open No. 11-225514).

[0003]

Generally, in the point sowing device, a certain number of seeds of paddy seeds are fed at a high speed by rotating the seeding portion at a high speed, and are thrown toward the soil surface. In the used form, the number of rotations of the motor must be changed and adjusted according to the traveling speed of the vehicle body, but it is difficult to keep the seeding speed constant, and the point-seeding form is likely to be close to the line-seeding form. The present invention is intended to eliminate such defects and to perform accurate high-speed spot seeding.

[0004]

According to a first aspect of the present invention, a sowing interval switching device for changing a sowing interval is provided to a sowing transmission device 3 for transmitting a traveling device 1 and a seeding device 2 in a point sowing mode in cooperation with each other. 4 is provided, and the configuration of the point seeder is characterized.

A point seeding action is performed while the traveling device 1 and the seeding device 2 are interlockingly transmitted by driving the engine to travel. When the traveling speed of the traveling device 1 becomes high due to a change in the engine speed or the like, the seeding timing becomes short, and when the traveling speed becomes low, the timing becomes long, so that the seeding interval for spot seeding is maintained constant regardless of the change in the traveling speed. When changing the seeding interval, the seeding interval switching device 4 of the seeding transmission device 3 interlocking with the seeding device 2 is switched and changed. When the seeding interval switching device 4 is changed to the high speed side, the point seeding interval is opened long, and when the speed is changed to the low speed side, it becomes short.

According to the second aspect of the present invention, the seed contained in the feeding hole 5 is fed while rotating, and the feeding roll 7 provided with the pushing-out device 6 for pushing the seed in the feeding hole 5 and the feeding roll 7 are provided. And a feeding cylinder 8 that guides the seeds, and the direction A of the seed that bounces from the feeding hole 5 to the feeding cylinder 8 is
The point seeder is configured such that a downward acute angle B is set with respect to the guide wall surface 9 of the feeding cylinder 8.

By the rotation of the feeding roll 7, the feeding hole 5
A predetermined number of seeds that are fitted to is delivered to the lower delivery cylinder 8 side. At this time, in the feeding hole 5, the seeds are pushed out to the feeding cylinder 8 by the pushing device 6. The seeds that are ejected are ejected in the direction of the downward acute angle B with respect to the guide wall surface 9 of the feeding cylinder 8 and are seeded and guided at high speed.

[0008]

According to the invention as set forth in claim 1, the seeding interval between each point sowing position of the seeding device 2 with respect to the traveling speed is changed by the transmission to the traveling device 1 by the switching of the seeding interval switching device 4 of the seeding transmission device 3. It is possible to adjust, and the rotations of the respective rotary parts in the seeding device 2 are interlocked and synchronously changed to maintain an accurate point-seeding state, and the point-seeding interval can be adjusted.

According to the second aspect of the present invention, the point-seeding seeds which are ejected at a high speed from the feeding hole 5 of the feeding roll 7 by the pushing device 6 are pushed to the guide wall surface 9 of the feeding cylinder 8 in the direction of the downward acute angle B. Since the seeds are guided and guided, the impact force against the guide wall surface 9 can be made small without lowering the jumping speed of the seeds so that the seeds can be rapidly fed out, and the point-seeding state is maintained and the high-speed sowing is performed accurately. be able to. Also, there is little damage to the seeds, especially when using coated seeds,
The collapse and peeling of the coating layer can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. First, referring to FIGS. 1 to 6, the seeding device 2
Is connected to the rear side of the tractor vehicle body 10 in the four-wheel drive riding mode via a lift link 11 which is a parallel link that can be moved up and down. A front wheel 12 and a rear wheel 13 are mounted on the front and rear of the vehicle body 10, and an engine 17 mounted below a driver's seat 16 uses a belt 18 transmission mechanism, a gear transmission mechanism in a transmission case 19, and a front. The transmission is rotated by a transmission mechanism in the rear axle housings 20 and 21. 22 is a steering wheel, which is the front wheel 12
Steering is interlocked. The pair of upper and lower lift links 11 is vertically rotatably connected to a rear end portion of the vehicle body 10 and is lifted and lowered by a lift cylinder 23 provided in the vehicle body 10 and hydraulically expanded and contracted. The center portion of the seeding device 2 is rotatably connected to the link hitch 24 at the rear end of the lift link 11 around the rolling shaft 25. A fertilizer application device 26 is mounted on the rear portion of the vehicle body 10. The fertilizer fed from the fertilizer application device 26 is applied to the soil surface near the point sowing part of the seeding device 2 via the fertilizer application pipe 27. As a whole, it is in the form of Hachijo sowing and fertilization.

The seeding device 2 comprises a seed hopper 2 on the upper side.
8, a feeding roll 7 for feeding the seeds, a feeding cylinder 8 and the like, and a discharge rotor 29 and a discharge cylinder 30 for discharging the seeds fed from the feeding cylinder 8 downward. A float 32 for supporting the frame 31 by sliding on the soil surface is arranged. Seeding cylinders 33 are provided on both left and right sides of each float 32, and each discharge cylinder 30 is provided on the upper side.
Also, the lower end of the fertilizer application pipe 27 is looked into and the seeds and fertilizer discharged downward are guided to the soil surface leveled by the float 32. Reference numeral 34 denotes an auxiliary wheel provided on the front side of the seeding frame 31, which can be grounded on the road surface for steering support and can be raised to a non-grounded state during seeding work.

Seeding transmission case 3 of the seeding frame 31
5, a bevel gear 36 transmission mechanism is provided, and a feeding shaft 37 of the bevel gear 36 is connected to a feeding shaft 37 of each feeding roll 7 and a discharging shaft 38 of each discharging rotor 29.
40 is transmitted and transmitted. The transmission device of such a seeding device 2 is interlocked with the PTO shaft 41 at the rear part of the vehicle body 10. The PTO shaft 41 is configured to be transmitted through PTO transmission shafts 42 and 43 transmitted from a gear transmission mechanism in the transmission case 19 of the vehicle body 10 and a reduction mechanism including a worm gear 44.

The gear transmission mechanism in the transmission case 19 is
An input shaft 46 which is interlocked with the belt 18 and has a main clutch 45, a speed change shaft 49 which is constantly meshed and transmitted from the input shaft 46 through a gear 48, and a main speed change gear 50 on the speed change shaft 49. Counter gear 51 that is meshed and transmitted
And a counter shaft 52 having a front wheel 12 and a rear wheel 13.
3 is transmitted.

The gear transmission mechanism such as the PTO shaft 41 includes a PTO input shaft 55 having a PTO input gear 54 which is always meshed with the counter gear 51 of the counter shaft 52 as the seed transmission device 3, a main transmission gear 56 and an auxiliary transmission. A transmission shaft 58 having a gear 67, a counter gear 59 meshing with the sub-transmission gear 57, a counter shaft 61 having a bevel gear 60, and the like are arranged, and the seedling for interlocking the PTO transmission shaft 42 from the bevel gear 60 is arranged. The interval switching device 4 is configured.

In the transmission of the seeding device 2 as described above, the counter shaft 52 is shifted by switching the main transmission gear 50, and the transmission of the PTO input shaft 55 transmitted from the counter gear 51 is also based on the same transmission ratio. Shifts to. Therefore, the ratio of the transmission speed of the seeding device 2 to the traveling speed does not change, and the seeding interval does not change. The seeding interval switching device 4 can shift the PTO transmission shaft 42 in four steps by switching the high / low position of the main transmission gear 54 and switching the high / low position of the auxiliary transmission gear 57. As a result, the ratio of the seeding transmission speed of the seeding device 2 with respect to the traveling transmission of the vehicle body 10 is switched, and each seeding interval for spot seeding can be changed.

The feeding roll 7 of the seeding device 2 has feeding holes 5 formed at triangular angles, and at the bottom of each feeding hole 5, a pushing arm 62 as a pushing device 6 is rotatable around an arm shaft 63. Is provided on the feeding shaft 37 by the spring 64.
It is raped to the side. A cam arm 64 is fitted and supported around the payout shaft 37, and a cam roller 65 at the tip of the arm 64 is brought into contact with the rotation range of the popping arm 62.
It is possible to operate the protrusion from the bottom of the feeding hole 5 to the outer peripheral portion. Reference numeral 66 denotes a base stopper of the pop-out arm 62, which is brought into contact with the inner peripheral surface of the roll 7. The position of the cam roller 65 is below the feeding shaft 37, and is set so that the direction A of the seeds bounced from the feeding hole 5 is a downward acute angle B with respect to the guide wall surface 9 of the feeding cylinder 8. To do. The cam arm 64 can be fixed by fastening a lock arm 68 at one end of a cylindrical shaft 67 fitted to the payout shaft 37 to an arcuate elongated hole 70 of the payout case 69 with a lock bolt 71. By moving the lock bolt 71 along the elongated hole 70, the operating position of the cam roller 65 can be adjusted, and the angle B of the jumping direction A can be adjusted. Reference numeral 72 denotes a scraper brush that scrapes the rotating surface of the pay-out roll 7 evenly.

The discharge rotor 29 is provided at the lower part of the feeding cylinder 8, and has a saw-toothed protrusion 73 formed on the rotating peripheral surface thereof. Several seeds are fitted between the protrusions 73 for rotation. Can be discharged to the lower discharge cylinder 30. The discharge rotor 29 is rotated around the discharge shaft 38 so that the lower end portion of the feeding cylinder 8 brings the protrusion 73 into the rotation range. The feeding cylinder 8 is formed in a state of being tangential to the rotation of the protrusion 73. 74
Is a case of the outer periphery of the discharge rotor 29. The fertilizer application device 26 is transmitted from the rear end portion 75 of the PTO transmission shaft 42.

When the feeding roll 7 is rotated, the hopper 28
Seeds of the scraper brush 72 are rotated by being fitted into the feeding hole 5 at the position of the popping arm 62 where the seeds of the scraper retract.
The seeds of a predetermined number of grains are scraped out by and are fed to the lower feeding cylinder 8 side. When the feeding hole 5 is located in the lower quadrant, the jumping arm 62 located at the bottom of the hole is acted on by the cam roller 65 and pushed outward against the spring 64, so that the seed in the feeding hole 5 is moved downward. Discharge A toward the guide wall surface 9. Since the seed discharging direction A is directed to the acute angle B along the guide wall 9 of the feeding cylinder 8, the seed discharging power is less likely to be decelerated, and the impact force is lessened so that the seed is discharged to the lower discharging roller 29 side. The seeds having a predetermined number of seeds can be distributed in a collected state while preventing them from being scattered as much as possible. The seeds thus fed out are the protrusions 73 of the discharge rotor 29.
It is engaged between and is discharged at variable speed to the discharge cylinder 30. At this time, the seeds intermittently fed out are not scattered but are engaged and discharged between the few protrusions 73. Therefore, a predetermined number of seeds guided by the seeding cylinder 33 and discharged to the soil surface are sown in a point-seeding state.

Mainly different from the above example in FIG. 7, the rear end surface 76 of the feeding hole 5 of the feeding roll 7 is
It is formed so as to be along the direction of the substantially radial direction line C.
As a result, the number of seeds of the predetermined number of seeds fitted in the feeding hole 5 is reduced, so that the seeds can be smoothly ejected from the feeding hole 5 and the seeding state can be accurately performed.

Next, a point different from the above example mainly based on FIG. 8 and FIG. 9 is that the left and right sides in the clogging sensor and the fertilization sensor 77 for detecting the fertilization state provided in the fertilization pipe 27 of the fertilizer application device 26. The light emitting detection surface 80 formed by the light emitting element section 78 and the light receiving element section 79 is arranged along the direction perpendicular to the direction of the fertilizer application pipe 27. As a result, it is possible to reduce the adhesion of fertilizer, dust, etc. to the detection surfaces of the light emitting element section 78, the light receiving element section 79, etc., and maintain accurate detection.
The fertilization pipe 27 portion provided with the fertilization sensor 77 is made of transparent glass so that the sensor can transmit light.
Further, the light emitting element portion 78, the light receiving element portion 79 and the like may be attached to the inner peripheral surface of the fertilizer application pipe 27.

[Brief description of drawings]

FIG. 1 is a transmission mechanism diagram of a point seeder.

FIG. 2 is a side view of the point seeder.

FIG. 3 is a plan view thereof.

FIG. 4 is a side view of the seeding device portion.

FIG. 5 is a side view of the feeding roll unit.

FIG. 6 is a sectional view and a side view of the popping-out device portion.

FIG. 7 is a side sectional view of a pay-out roll portion showing another embodiment.

FIG. 8 is a plan view of a fertilizer application sensor part showing another embodiment.

FIG. 9 is a front sectional view thereof.

[Explanation of symbols]

1 traveling device 2 Seeding device 3 Seeding transmission device 4 Seeding interval switching device 5 Feeding hole 6 Jumping device 7 Feeding roll 8 Delivery cylinder 9 Information wall

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Claims (2)

[Claims] 1. A point sowing machine, characterized in that a seeding transmission device (3) for interlocking transmission of a traveling device (1) and a seeding device (2) in a point sowing form is provided with a seeding interval switching device (4) for changing a seeding interval. 2. A feeding roll 7 provided with a pushing-out device 6 for feeding the seeds accommodated in the feeding holes 5 while rotating, and for ejecting the seeds of the feeding holes 5, and a feeding roll for guiding the ejected seeds. A point sowing machine having a cylinder 8 and a direction A of the seeds bounced from the feeding hole 5 to the feeding cylinder 8 is set to a downward acute angle B with respect to a guide wall surface 9 of the feeding cylinder 8.