JP2002034301A - Rotary cultivator - Google Patents

Abstract

(57) [Problem] To provide a disk for preventing weeds from being wound around a claw shaft easily and easily without removing the claw shaft from a rotary machine frame. SOLUTION: An attachment body 4 is provided at an end portion of a claw shaft 3 on which a cultivating claw 2 is mounted, and a plurality of discs for forming a substantially circular outer periphery are fitted to the claw shaft 3 from the radial outside to prevent winding of grass. 5
Is fixed to the mounting body 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tiller capable of preventing winding of grass.

[0002]

2. Description of the Related Art Leftover treatment after harvesting, especially rush, melon,
Rotary tilling after harvesting watermelons and the like has many long foliage and vines, so that grass (foliage, vines, etc.) is more wrapped up compared to tilling after harvesting of rice and the like, and reduces work efficiency. The winding of grass around a claw shaft is disclosed in Japanese Patent No. 293152.
As disclosed in Japanese Patent Laid-Open Publication No. 6-64, it can be prevented by supporting a linear member extending along the axial direction of the claw shaft away from the claw shaft, and the grass is wound around the bearing portion outside the shaft end of the claw shaft. As disclosed in Japanese Patent Publication No. 40-20644, a dish-shaped disk can be provided near the shaft end of the claw shaft in the vicinity of the shaft support.

[0003]

The disk at the end of the claw shaft shaft according to the prior art has one circular plate material directly fixed to the claw shaft, and is detachable even if the claw shaft is removed from the rotary machine frame. It could not function as an attachment to be removed when not needed. As shown in FIG. 9, the disk P is provided with a mounting body 4 on the claw shaft 3 and is fitted to the claw shaft 3 detached from the rotary machine frame from an end to be detachably mounted. Although it is possible to do so, attaching and detaching the claw shaft 3 to and from the rotary machine frame is troublesome, so it is practically difficult to attach and detach the disk P according to field conditions. Note that the disk P in FIG. 9 has a sawtooth-shaped cutting blade 8 formed on the outer peripheral edge so that grass can be strongly cut, and the mounting body 4 is welded to the claw shaft 3.

[0004] It is an object of the present invention to provide a rotary tiller capable of solving such various problems. The present invention is configured such that a plurality of discs for preventing grass winding are fitted to the claw shaft from the radial outside to form a substantially circular outer periphery with a plurality of discs, so that the disc can be easily and easily detached without removing the claw shaft. It is an object of the present invention to provide a rotary tiller that can be used.

[0005]

A first concrete means for solving the problem in the present invention is to provide a mounting member 4 at an end of a claw shaft 3 on which a tilling claw 2 is mounted, That is, a plurality of disks 5 for preventing grass wrapping, which form a substantially circular outer periphery with a plurality of pieces, are fixed to the mounting body 4. As a result, the disk 5 is divided into a plurality of pieces, and can be detached without removing the claw shaft 3. When the plurality of discs 5 are attached to the mounting body 4, a substantially circular outer periphery is formed, and winding of grass is performed. Well prevented.

A second concrete means for solving the problem in the present invention is that a support arm 12 projects left and right from a gear case 11, and a transmission case 13 and a side frame 14 are attached to outer ends of the left and right support arms 12. attachment,
A rotating shaft 15 is provided below the transmission case 13 and the side frame 14 via a bearing 17, and the claw shaft 3 is connected between the two rotating shafts 15. A large number of tilling claws 2 are mounted on the claw shaft 3. Attachment members 4 are provided at both left and right ends of the claw shaft 3, and right and left disks 5 for preventing grass winding are arranged axially outside the attachment member 4 and close to the transmission case 13 and the side frame 14. The left and right disks 5 are fixed to the mounting body 4, and the left and right disks 5 are divided into a plurality of pieces to form a substantially circular outer periphery by being fitted to the claw shaft 3 from the radial outside.

As a result, the disc 5 is divided into a plurality of discs, and can be detached without removing the claw shaft 3. When a plurality of discs 5 are mounted on the mounting body 4, a substantially circular outer periphery is formed. Winding of grass around the bearing portion 17 is sufficiently prevented. A third specific means for solving the problem in the present invention is that, in addition to the first or second specific means, a claw bracket 16 for attaching the tilling claw 2 to the claw shaft 3 is provided. Mounting body 4
Is removably attached together with the tilling claw 2.

As a result, the mounting member 4 can be mounted very easily and at low cost, and the mounting member 4 and the disk 5 can be mounted without any processing of the existing claw shaft 3. A fourth specific means for solving the problem in the present invention is that, in addition to any one of the first to third specific means, a circumferential end of the disk 5 is attached to a circumferential end of an adjacent disk 5. That is, they overlap and are connected. This makes it possible to connect a plurality of disks 5 in the circumferential direction, thereby improving the shape-retaining strength and the mounting strength.

According to a fifth specific means for solving the problems in the present invention, in addition to any one of the first to fourth specific means, a connecting plate 6 is connected to the inner peripheral side of the disk 5, and The end of the connecting plate 6 is connected to the disks 5 adjacent in the circumferential direction, and the disks 5 are fixed to the mounting body 4 via the connecting plates 6. Thereby, the reinforcement and the mounting strength of the disk 5 are improved. A sixth specific means for solving the problem in the present invention is that, in addition to any one of the first to fifth specific means, the outer diameter D of the disk 5 is changed to the rotation locus diameter E of the outer end of the tilling claw 2. That is, it is set substantially equal to.

[0010] This makes it possible to more reliably prevent grass that is pushed outward from the tilling claw 2 side from moving, and to prevent the claw shaft 3 from being wound around the bearing portion 17. Seventh concrete means for solving the problem in the present invention is the first to sixth embodiments.
In addition to any of the specific means described above, a cutting blade 8 is formed on the outer peripheral edge of the disk 5. As a result, the grass is cut short, and winding of the grass around the bearing portion 17 of the claw shaft 3 is more effectively prevented.

An eighth concrete means for solving the problem in the present invention is a linear member between the tilling claws 2 at both ends of the claw shaft 3 in addition to any one of the first to seventh concrete means. 7, and at least one linear member 7 is provided in the circumferential direction. Thereby, the linear member 7 corresponding to the claw shaft 3 is added, and the winding of the grass over the entire width of the rotary tiller is prevented.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7, reference numeral 1 denotes a side drive type rotary cultivator, which protrudes a support arm 12 to the left and right from a gear case 11, and a transmission case 13 and a side frame 1
4 is attached to form a rotary machine frame 10, a rotating shaft 15 is provided below the transmission case 13 and the side frame 14 via a bearing 17, and the pawl shaft 3 is connected between the two rotating shafts 15. .

The power is transmitted from the PTO shaft of the tractor to the input shaft 19 of the gear case 11 and transmitted to the chain transmission means 18 in the transmission case 13 via the gear in the gear case 11 and the transmission shaft in the left support arm 12. The claw shaft 3 is driven via the rotating shaft 15 on the transmission case 13 side. The rotation shaft on the transmission case 13 side is the drive claw shaft, and the rotation shaft on the side frame 14 side is the idle shaft. A cover device 21 that covers the tilling unit 20 is provided inside the transmission case 13 and the side frame 14. The cover device 21 has side covers 23 attached to the transmission case 13 and the side frames 14 fixed to the left and right sides of a main cover 22 that covers the upper part of the tilling unit 20, and a surface of the main cover 22 on the tilling unit 20 side. An elastic cover 24 is stretched, and a rear cover (not shown) that covers the tilling unit 20 from behind is pivotally supported at the rear of the main cover 21 so as to be vertically swingable.

A plurality of claw brackets 16 are provided on the claw shaft 3 formed of a cylindrical tube at intervals in the axial direction and the circumferential direction. The claw bracket 16 has a shape in which a small U-shaped member is fitted to a large U-shaped member, and a concave portion 16A into which the base of the tillage claw 2 is inserted is formed at the center. Two claw brackets 16 are provided at the left and right ends of the claw shaft 3 at positions substantially the same in the axial direction and spaced apart in the circumferential direction. One claw bracket 16 has the same claw 2 as the other.
A, while the other claw bracket 16
Is mounted with a special claw 2B having a portion protruding in the off-axis direction of the claw shaft 3 in order to increase the tilling width as much as possible.

Each tilling claw 2 has its base at the claw bracket 16
Into the recesses 16A, and through these bolts 27,
The nut is screwed and fastened. Reference numeral 7 denotes a linear member formed of a thin rod, a spring, a wire, or the like, which is disposed substantially along the outer side of the claw shaft 3 and has one or a plurality
In the embodiment, two are provided. Locking tools 28 are connected to both ends and a middle part of the linear member 7, and the locking tools 28 are locked to the tilling claw 2 located at both ends and a middle part of the claw shaft 3. A long hole 29 is formed in the locking tool 28, and the tilling claw 2 is inserted into the long hole 29.

A disk 5 for preventing grass from wrapping is disposed outside the special claw 2B in the claw shaft 3 axial direction, and is fixed to the claw shaft 3 via a mounting body 4. This disk 5 is composed of a transmission case 13 and a side frame 14.
Is attached to the claw bracket 16 via the attachment body 4 so as to be detachable. The mounting body 4 is formed by bending a plate material into a hat shape in a front view, and has a U-shaped fitting portion 4A fitted to the claw bracket 16 and a mounting flange portion extending from both ends of the fitting portion 4A. 4B.

When the fitting portion 4A is fitted to the claw bracket 16, the fitting portion 4A is fastened to the claw bracket 16 by bolts 27 for attaching the tilling claw 2, and the mounting flange portions 4B at both ends are connected via the connecting plate 6. It is fixed to the disk 5 with bolts 32. Therefore, even if the attachment body 4 is an existing rotary cultivator, it can be attached to the claw bracket 16 without processing the claw shaft 3 and the claw bracket 16,
Therefore, the disc 5 can be attached to the claw shaft 3 which is still attached to the existing rotary machine frame 10, and when the attachment body 4 and the disc 5 are removed, a state suitable for rotary plowing work which does not need to prevent grass winding is required. Easy to change.

The disk 5 is divided into two divided disks 5A. The two divided disks 5A have the same shape (substantially semicircular shape) and can be fitted to the claw shaft 3 from the outside.
By combining the sheets, a disk shape having a substantially circular outer periphery is obtained. The outer diameter D of the disk 5 is set to be substantially equal to the rotation locus diameter E of the outer end of the tilling claw 2 (the outer diameter of the tilling unit 20),
Grass being pushed outward from the tilling claw 2 side can be more reliably prevented from moving. Each divided disk 5A is 1
It has an arc shape slightly longer than 80 degrees, overlaps with the end of the adjacent divided disk 5A by the length thereof, and is connected in the circumferential direction by the bolt 31 at the overlap portion 5B. A protruding ridge 5C for hiding the head of the bolt 31 is formed at the end of the overlap portion 5B (on the leading side in the rotation direction).

The connecting plate 6 has an arc shape that is substantially circular by two pieces, and is screwed to the inner peripheral side surface of each divided disk 5A. The connecting plate 6 is attached to the divided disk 5A so as to slightly protrude in the circumferential direction from each of the divided disks 5A, and this protruding portion is connected to the divided disks 5A adjacent in the circumferential direction, thereby reinforcing the disk 5 and securing the mounting strength. And have been improved. The mounting flange portion 4B of the mounting body 4 connects the bolt 32 to the disc 5 and the connecting plate 6
However, the connecting flange 6 may be connected to the connecting plate 6, and the connecting plate 6 may be connected to the disk 5.

In order to increase the strength of the connection between the two divided disks 5A in the circumferential direction, it is preferable to provide a connection auxiliary plate 34 as shown in FIG. FIG.
The two divided disks 5A of the disk 5 each have a sawtooth-shaped cutting blade 8 formed on the outer peripheral edge thereof, so that the grass can be more strongly cut between a field and a field. Thus, the grass is prevented from winding around the bearing portion of the claw shaft 3. Further, a hole 36 is formed in the disk 5 to achieve measurement.

The present invention is not limited to the above embodiment, but can be variously modified. For example,
The disc 5 may be provided at both ends of the inclined claw shaft of the center drive type rotary cultivator. The disc 5 may be divided into three or more equally or unequally divided parts. At the position, it is fixed to the claw shaft 3, the cutting edge 8 is formed by forming a sharp blade on the outer peripheral edge of the disk 5 of the embodiment, or the connecting plate 6 and the connecting auxiliary plate 34 are omitted, and the mounting body 4 is removed. Alternatively, the disk 5 may be fixed directly to the disk.

[0022]

According to the present invention described in detail above, the disk 5 divided into a plurality of discs is
Can be attached to and detached from the claw shaft 3 from the radial outside without being removed, and can be easily and easily used as an attachment if necessary. When the disks 5 are respectively mounted on the mounting body 4, a substantially circular outer periphery is formed, Winding of grass around the portion 17 can be sufficiently prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional rear view of a main part.

FIG. 3 is a partial cross-sectional side view of a main part.

FIG. 4 is a rear view of the entire rotary tiller.

FIG. 5 is a sectional view taken along line XX of FIG. 2;

FIG. 6 is a side view of the attachment body.

FIG. 7 is a sectional view taken along line YY of FIG. 3;

FIG. 8 is a side view showing a modification of the disk.

FIG. 9 is a side view showing a comparative example of a disk.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary cultivator 2 Tilling claw 3 Claw shaft 4 Mounting body 5 Disk 5A Dividing disk 5B Overlap part 6 Connecting plate 7 Linear member 8 Cutting blade 11 Gear case 12 Support arm 13 Transmission case 14 Side frame 15 Rotary shaft 16 Claw bracket 17 Bearing D Outer diameter E Rotation locus diameter

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hirofumi Sakane 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Plant (72) Inventor Ken Kenoshita 64, Ishizukita-cho, Sakai City, Osaka Prefecture In-house (72) Inventor Takaaki Ohno 64 Ishizu-Kitacho, Sakai-shi, Osaka F-term in Kubota Sakai Works (reference) 2B033 AB01 AB11 AC05 BA01 BA06 BA07 BB02 BC04 BC12 BD06 CA04 CA13 CA32 DA01 DA02 DB01 DB47 ED08

Claims (8)

[Claims] An attachment body is provided at an end of a claw shaft on which a tilling claw is mounted, and a plurality of disks for forming a substantially circular outer periphery are fitted to the claw shaft from the outside to mount the grass-wound prevention disk. Rotary tiller fixed to the body. 2. A support arm protrudes left and right from the gear case, a transmission case and a side frame are attached to outer ends of the left and right support arms, and a rotating shaft is mounted on a lower portion of the transmission case and the side frame via a bearing. And a nail shaft is connected between both rotating shafts, and a large number of tilling nails are mounted on the nail shaft, and mounting members are provided on both right and left ends of the nail shaft, respectively. Right and left discs for preventing grass winding are arranged close to the side frame, and the left and right discs are fixed to the mounting body, and the left and right discs are fitted to the claw shaft from the radial outside to form a plurality of discs. A rotary tiller having a divided shape that forms a substantially circular outer periphery. 3. The rotary plow according to claim 1, wherein a nail bracket for attaching a tilling nail is provided on the nail shaft, and the mounting body is detachably attached to the nail bracket together with the tilling nail. Machine. 4. The rotary tiller according to claim 1, wherein a circumferential end of the disk is connected to a circumferential end of an adjacent disk in an overlapping manner. 5. A connecting plate is connected to an inner peripheral side of the disk, and an end of the connecting plate is connected to a disk adjacent in the circumferential direction, and the disk is fixed to a mounting body via the connecting plate. The rotary tiller according to any one of claims 1 to 4, wherein: 6. The rotary tiller according to claim 1, wherein the outer diameter of the disk is set to be substantially equal to the diameter of the rotation locus of the outer end of the tilling claw. 7. The rotary cultivator according to claim 1, wherein a cutting blade is formed on an outer peripheral edge of the disk. 8. The method according to claim 1, wherein a linear member is stretched between the tilling claws at both ends of the claw shaft, and at least one linear member is provided in the circumferential direction. The rotary tiller according to any one of the above.