JP5515091B2 - Tractor towing direct sowing machine - Google Patents

Description

  The present invention relates to a tractor towed direct sowing machine, in order to sow seeds such as soybeans in a non-tillage field, when a sowing groove is dug in a field with a grooving claw wheel of a direct sowing machine, a large stone or the like is flipped up. In this case, the grooving claw wheel and the connecting portion between the grooving claw wheel and the machine body are prevented from being damaged.

  Conventionally, as a direct sowing machine for sowing seeds in this type of no-tillage field, the present applicant has provided a tractor-towing type no-tillage direct sowing machine in Japanese Patent Application Laid-Open No. 2003-61411.

  In the conventional apparatus, as shown in FIG. 6A, the body 1 is supported by a grounding wheel 1a and a pressure-reducing wheel 1b so as to be able to travel, and the front of the body 1 is connected to the link portion Ta of the tractor T and pulled. The machine body 1 is provided with a sowing groove claw wheel 2 for engraving a sowing groove on the ground surface, and the soil guide that guides the soil sputtered up by the sowing wheel claw wheel 2 to the upper part of the sowing groove claw wheel 2 is guided backwards. A cover 3 is provided, and a seed conduit 5 that opens to the rear lower side of each seeding unit 4 and seeding groove claw wheel 2 is installed in the body 1. As shown in FIG. 6B, the soil guide cover 3 provided above the sowing groove claw wheel 2 is fixed to the machine body 1 with screws through the bracket 6.

JP 2003-61411 A

The tractor towing type no-till direct sowing machine shown in FIG. 6 can cope with an increase in the size of a farm, has high workability, and is efficient. However, since the soil in the non-tillage field is solid, sowing is carried out without plowing the entire field, so the durability of the machine is required.
As described above, the soil guide cover 3 provided above the sowing claw wheel 2 that forms the sowing groove is fixed to the machine body 1 with screws through the bracket 6. Therefore, there is a large stone in the no-tillage field, and when the foreign object such as the stone is caught in the soil guide cover, the machine body 1 is directly impacted. 6 may be broken and the soil guide cover 3 may come off from the airframe 1, and there is room for improvement in that respect.

  Therefore, the present invention provides a durable tractor in which the soil guide cover does not come off the fuselage even when large stones are caught in the soil guide cover when sowing seeds such as soybeans in a no-tillage field. It is an object to provide a towing type direct seeding machine.

In order to solve the above-described problems, the present invention provides a grooving claw wheel that is connected to the airframe and is driven to rotate in the reverse direction of the traveling direction, and behind the grooving claw wheel from behind the grooving wheel. A soil guide cover that covers the upper part, and a seed conduit behind the chamfer for grooving,
The soil guide cover is attached to the airframe with a buffer member interposed therebetween ,
Specifically, a cover stopper plate is fixed to a cover mounting shaft projecting from the airframe, the rubber cushioning member is accommodated in a housing portion provided on the cover stopper plate, and on the outer surface side of the cushioning member. While the buffer member pressing plate is disposed, a cover mounting plate fixed to the soil guide cover is disposed on the inner surface side of the buffer member, and the buffer member is sandwiched between the cover mounting plate and the buffer member pressing plate. The tractor towing type direct seeder is provided.

The tractor towing direct sowing machine connects the body of the direct sowing machine that sows while carving the sowing groove on the ground surface with a grooving claw wheel while traveling on the ground surface, and the traveling wheels that are towed by the tractor and run It is installed at the front and back positions of the direct seeding machine.
A driving force transmission unit that transmits the driving force of the tractor to the grooving claw wheel of the direct seeding machine is provided, and the grooving claw wheel is rotated in the direction opposite to the traveling direction by the driving force transmission unit.

  As described above, in the present invention, since the buffer member is provided between the soil guide cover and the machine body, when digging a sowing groove with a grooving claw wheel, a foreign object such as a large stone repels from below, and the soil Since the buffer member absorbs an impact when colliding with a guide cover or a portion connecting the soil guide cover and the machine body, the soil guide cover and the machine body body can be protected.

The shock-absorbing member is made of urethane rubber, and bolts are assembled into shaft holes provided in the center of the shock-absorbing member through shaft holes provided in the shock-absorbing member pressing plate and the cover mounting plate. It is preferable that shock absorbing holes are provided in the buffer member at intervals around the shaft hole.
The rubber forming the buffer member is not limited to urethane rubber, but strong urethane rubber is preferably used. The hardness of the urethane rubber is JIS type A K6253 and is preferably 60 to 100 degrees.

  When the above configuration is used, a strong urethane rubber is used as a buffer member, and the buffer member is interposed between the soil guide cover and the machine body. In addition, it can withstand the impact. And by providing a shock absorbing hole in the buffer member, it can be easily deformed in the direction of absorbing the shock, and when a foreign object such as a stone is caught from below, the urethane rubber is deformed to absorb the shock, The impact transmitted to the aircraft can be reduced.

It is preferable that the shock absorbing hole has a large shock absorbing hole provided at an interval of 90 degrees and a small shock absorbing hole provided between the large shock absorbing holes. When the shock absorbing hole is provided in this way, the buffer member can be deformed in an arbitrary direction.
Therefore, when a foreign object such as a large stone is caught from below the soil guide cover and the grooving claw wheel, if the soil guide cover receives an impact that deforms in the vertical, left, and right, front and rear directions, the impact is buffered. The shock absorption hole of the slab is deformed in the vertical direction and the width direction to absorb the shock, and the shock transmitted to the machine body is prevented, thereby preventing the machine body from being damaged and preventing the soil guide cover from falling off.

  In addition, it is preferable to provide a posture holding table configured to allow even one person to connect the tractor towed direct seeding machine to the tractor, and attach the posture holding table to the body of the direct seeding machine.

  According to the present invention, when digging a sowing groove with a grooving claw wheel in a soil with a hard soil, even if a foreign object such as a large stone enters the grooving claw wheel, the buffer member is provided. In addition to preventing damage to the soil guiding cover and the connecting member with the machine body, the impact on the machine body can be absorbed, and the durability of the direct sowing machine can be increased.

1 shows a first embodiment of the present invention and is a side view of a tractor-traction direct seeding machine. FIG. It is a top view of the cover attachment part for soil guidance provided in the said tractor pull type direct seeding machine. It is a side view of the buffer member installation condition provided in the tractor pull type direct seeding machine. The attitude | position holding stand used in 2nd Embodiment is shown, (A) is a front view, (B) (C) is a left-right side view. It is the side view which mounted | wore the attitude | position holding base with the tractor pull type direct seeding machine of this invention. The conventional towing type no-tillage direct sowing machine is shown, (A) is a side view, and (B) is an enlarged view of a main part.

Hereinafter, a tractor pull type direct seeder according to an embodiment of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment.
As shown in FIG. 1, the tractor towed direct sowing machine 10 supports its body 11 with a front grounding wheel 11a and a rear pressure wheel 11b, and connects the front of the body 11 with a link portion of a tractor (not shown). Towing a direct sowing machine with a tractor. Further, a seed hopper 12 is attached to the upper rear portion of the body 11.

In front of the seed hopper 12, a claw wheel 14 for grooving is disposed between the ground wheel 11a and the pressure wheel 11b. A driving force transmission unit is provided in which a rotating shaft 13 fixed to the grooving claw wheel 14 is connected to a PTO shaft (not shown) of the tractor. The driving force transmission unit rotates the rotating shaft 13 in the direction opposite to the traveling direction of the tractor, and the grooving claw wheel 14 rotates in the direction opposite to the traveling direction as indicated by the arrow F direction.
On the outer periphery of the base portion 14a of the grooving claw wheel 14 fixed to the rotating shaft 13, a claw portion 14b for sowing groove formation is provided so as to protrude in the circumferential direction.

A soil guide cover 15 having a curved shape so as to cover the front and top of the grooving claw wheel 14 is connected to the airframe 11 via a cushioning member 19 made of urethane rubber. The coupling mechanism is shown in FIGS.
A cover stopper plate 18 is fixed to an arbitrary position on a cover mounting shaft 25 projecting from the body 11 with bolts, and a pair of buffer member accommodating portions 18 a and 18 b are provided in the left-right width direction of the cover stopper plate 18. Each buffer member accommodating portion 18a, 18b has a square frame shape with both sides in the left-right width direction opened, and accommodates the buffer member 19 (19A, 19B) by fitting inside. The buffer member pressing plates 21 (21A, 21B) are arranged on the outer surfaces in the width direction of the buffer members 19A, 19B, respectively, and the cover mounting plates 16 (16A, 16B) fixed to the soil guide cover 15 are arranged on the inner surfaces. The buffer member 19 is sandwiched between the buffer member pressing plate 21 and the cover mounting plate 16.
A shaft hole 19 h is provided at the center of the pair of left and right buffer members 19, and a shaft hole 21 h is provided at the center of the pair of buffer member pressing plates 21. A cylindrical boss 21j protrudes from the outer peripheral edge of the shaft hole 21h of the buffer member pressing plate 21.

  On the other hand, the support tube 28 is welded to the lower side of the front side of the soil guide cover 15, and the cover mounting plates 16 (16 </ b> A, 16 </ b> B) are welded to the outer periphery of both ends of the support tube 28. The pair of cover mounting plates 16 are disposed so as to contact the inner surfaces of the pair of buffer members 19 mounted on the cover stopper plate 18, and the central axis of the support cylinder 28 is set to the buffer member 19 and the buffer member pressing plate 21. It arrange | positions so that it may correspond with the center axis line of this shaft hole.

As described above, in the state where the support cylinder 28 and the cover mounting plate 16 fixed to the soil guide cover 15 are arranged, the bolt shaft 17 serving as the buffer member mounting shaft on the buffer member pressing plate 21, the buffer member 19, and the support cylinder 28. And are assembled by fastening with a nut 20.
Specifically, after the shaft portion 17a of the bolt shaft 17 is passed from the buffer member pressing plate 21A to the shaft hole of the buffer member 19A, the hollow portion of the support cylinder 28 is passed through, and the other buffer member 19B and the buffer member pressing plate are passed. The shaft hole of 21B is penetrated, the head 17b of the bolt shaft 17 is brought into contact with the boss 21j of the buffer member pressing plate 21A, and the nut 20 is attached to the other end of the shaft portion 17a and fastened.

The buffer members 19A and 19B assembled by the above and held by the cover stopper plate 18 are sandwiched between the cover mounting plate 16A and the buffer member pressing plate 21A, and the cover mounting plate 16B and the buffer member pressing plate 21B, respectively.
Between the buffer member 19 (19A, 19B) and the cover mounting plate 16 (16A, 16B), gaps C1, C2 of 0.3 mm to 0.7 mm are respectively provided.

The buffer member 19 (19A, 19B) is formed of hard urethane rubber in this embodiment. The buffer member 19 is square in a side view, and in this embodiment, the thickness is 20 mm, and one side is 75 mm. As described above, the shock-absorbing member 19 is provided with a shaft hole 19h having a diameter of 16 mm that penetrates the shaft portion 17a of the bolt shaft 17 at the center. Further, four shock absorbing holes 19a each having a diameter of 20 mm are provided in the vertical and horizontal directions on the central axis of the shaft hole 19h, and shock absorbing holes 19b having a diameter of 10 mm are provided at four positions on the diagonal of the central axis of the shaft hole 19h. Is provided.
The material of the impact member 19 and the number and size of the impact holes 19a and 19b can be changed as appropriate according to the soil condition of the field.

  As described above, the buffer member 19 (19A, 19B) is accommodated in the accommodating portions 18a, 18b of the cover stopper plate 18, and the cushion member pressing plate 21 and the cover mounting plate 16 are accommodated in the accommodating portions 18a, 18b. However, the shock absorbing holes 19a and 19b can be deformed in the up and down direction y and the front and rear direction x as shown in FIG. . That is, the buffer member 19 can be deformed in the three-dimensional directions of x, y, and z.

At the rear of the grooving claw wheel 14, the seed conduit 22 is attached to the machine body 11 facing downward. The seed conduit 22 is a bracket extending from the airframe 11 so that the mounting location can be adjusted in the vertical and forward / backward directions, and the rotation of the pressure-reducing wheel 11b drives the feeding device below the seed hopper 12 to send seeds to the seed conduit 22. Guiding and dropping seeds into the field.
A cover plate 23 is provided behind the grooving claw wheel 14. The covering plate 23 is formed in a substantially U shape by bending a part of a metal plate having a required rigidity, and a rubber-like reflecting plate 24 is provided at the rear.

Next, the no-tillage direct sowing work by the tractor pull type direct sowing machine 10 will be described.
The seed hopper 12 is filled with seeds, the tractor towing type direct sowing machine 10 is pulled by the tractor T, and the rotating shaft 13 is rotated in the direction opposite to the rotating direction of the grounding wheel 11a and the pressure reducing wheel 11b by driving the PTO shaft. By this rotation, the sowing groove M is formed in parallel by the grooving claw wheel 14 and the sowing groove M is covered while the sowing is performed by driving the pressure reducing wheel 11b.

  Specifically, as shown in FIG. 1, the sowing groove M is formed by digging up soil in the field H with the claw portions 14 b of the rotating grooving claw wheel 14. It is guided backward along the inner peripheral surface 15 a of the guide cover 15. In the state where a part of the guided scattered soil covered the groove bottom of the sowing groove M, seeds were sown from the seed conduit 22 adjusted in the front-rear position, and the remaining scattered soil was received by the cover plate 23 and received. The scattered soil is poured into the sowing groove M by the trapezoidal reflector 24 to cover the sowing groove M. After the sowing of the sowing groove M, it is suppressed by the suppression wheel 11b.

  When forming the sowing groove M with the grooving claw wheel 14, foreign matters such as the soil surface and stones in the soil are also leap up and guided to the soil guide cover 15. When a large stone is caught in the soil guide cover 15, it collides with the support cylinder 28, the cover mounting plate 16, the cover stopper plate 18 and the like. At this time, since the buffer member 19 can be freely deformed in the x, y, and z directions as described above, the buffer member 19 is deformed in the direction of absorbing the shock, and the shock is mitigated. Therefore, it is possible to prevent the connection mechanism between the soil guide cover 15 and the airframe 11 from being damaged, and the operation can be continued without interruption.

FIG. 4 and FIG. 5 show a second embodiment of the tractor-traction type direct seeder of the present invention.
In the second embodiment, a posture holding base 50 for connecting the body 11 of the tractor towed direct seeding machine 10 to the tractor is attached. Since the structure of the tractor pull type direct seeding machine 10 is the same as that of the first embodiment, the description thereof is omitted.
By using the posture holding table 50, the tractor towed direct seeding machine 10 can be easily attached to the tractor.
Conventionally, the work of connecting / disconnecting the direct seeding machine to / from the tractor is performed by two workers, one person fixing the body, and one person connecting the body and the tractor and attaching them to the tractor. In addition, the tractor mounting method is a three-point link method, and it is necessary to attach three locations, which is very burdensome for the worker and takes time to install.

  As shown in FIG. 4, the posture holding table 50 is U-shaped, and is provided with a connecting pipe 52 at the top of each of the left and right holding tables 51, and a holding table horizontal plate 53 is connected below the left and right holding tables 51. ing. The lower part of the left and right holding base 51 and the rear side of the holding base horizontal plate 53 are folded in a U-shape, and a bent portion 51 a of the left and right holding base 51 and a bent portion 53 a of the holding base horizontal plate 53 are provided. It is configured.

In the mounting method of the posture holding table 50, first, the bent portions 51a of the left and right holding tables 51 of the posture holding table 50 are passed over the shaft of the front grounding wheel 11a, and the bent portions 53a of the holding table horizontal plate 53 are covered. It mounts | wears so that it may each span over the attachment shaft 25.
Next, the lower link of the tractor (not shown) is lowered to the full.
The machine body 11 of the tractor pull type direct seeding machine 10 is moved to the rear of the tractor, and the lower link is connected to the holes 30a at both ends of the tractor mounting portion 30 with the lower link mounting pins.
The lower link to the tractor is slightly raised, and the top link is connected to the hole 30b of the tractor mounting portion with the upper link mounting pin.
Finally, the joint part of the tractor and the input shaft 30c of the tractor mounting part 30 are connected.
Again, the lower link is slowly raised, and the ascending is temporarily interrupted when the grounding wheel 11a of the airframe 11 is lifted, and the posture holding base 50 is shifted rearward and pulled out upward.

  As described above, since the three positions of the three-point link are fixed by using the posture holding stand 50, the work of attaching the body 11 of the tractor towed direct seeding machine 10 to the tractor can be performed by one worker. Time can be shortened.

  In addition, the direct seeding machine of the present invention is not limited to the above-described form, and for example, the number of seed hoppers can be appropriately increased or decreased according to work conditions and the like, and 2 to 8 or more at a time. So that the sowing work can be performed. In addition to the seed hopper, a fertilizer hopper, a medicine hopper, or the like can be attached to enable fertilization and medicine simultaneously with the sowing operation.

DESCRIPTION OF SYMBOLS 10 Tractor towing type direct seeding machine 11 Airframe 12 Seed hopper 13 Rotating shaft 14 Groove claw wheel 15 Soil guide cover 16 Cover mounting plate 17 Bolt shaft used as buffer member mounting shaft 18 Cover stopper plate 19 Buffer member 20 Nut 21 Buffer member Holding plate 22 Seed conduit 23 Covering plate 24 Reflecting plate 25 Cover mounting shaft 30 Tractor mounting portion 50 Posture holding stand 51 Left and right holding stand 52 Connection pipe 53 Holding stand horizontal plate

Claims (2)

A grooving ratchet wheel connected to the machine body and driven to rotate in the direction opposite to the traveling direction; a soil guide cover covering the rear of the grooving tooth wheel from the rear to the upper side of the grooving wheel; and the groove Equipped with a seed conduit behind the cutting claw wheel,
The soil guide cover is attached to the airframe with a buffer member interposed therebetween ,
Specifically, a cover stopper plate is fixed to a cover mounting shaft projecting from the airframe, the rubber cushioning member is accommodated in a housing portion provided on the cover stopper plate, and on the outer surface side of the cushioning member. While the buffer member pressing plate is disposed, a cover mounting plate fixed to the soil guide cover is disposed on the inner surface side of the buffer member, and the buffer member is sandwiched between the cover mounting plate and the buffer member pressing plate. tractor tractor straight seeder, characterized in that is. The buffer member is made of urethane rubber, and a bolt is inserted into a shaft hole provided in the buffer member holding plate and the cover mounting plate in a shaft hole provided in the center of the buffer member. The tractor pull type direct seeding machine according to claim 1 , wherein shock absorbing holes are provided at intervals around the holes.

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