JPH0880102A - Rotary tiller - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a rotary tiller that can perform good tilling work even if the traveling speed is increased without changing the rotation speed of the rotary tiller. [Structure] A plurality of plowing pawls 13 at a plowing pawl mounting portion on a plowing pawl shaft 12 of a rotary tilling device.
a is located on substantially the same plane, a plurality of rows are arranged on the tiller shaft 12, and each row of the tillers 13 is alternately arranged rightward and leftward, and the mounting angle difference of each tiller 13 is large or small. They are set alternately. In addition, the plowing claw 13
The cultivating claw shaft 12 to which is attached is a holder type, and a phase difference is provided between it and the cultivating claws in the adjacent row.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a tilling claw of a rotary tiller.

[0002]

2. Description of the Related Art Conventionally, a rotary cultivator is attached to the rear part of a tractor or a cultivator, and cultivating work is performed by this rotary cultivator, but simple cultivating work is monotonous.
In addition, we would like to complete the plowing work as soon as possible in a vast field or under contract farming. for that reason,
If the traveling speed is changed to a high speed side to increase the traveling speed, the tilling pitch becomes coarse and uniform tilling cannot be performed.

[0003]

As described above, when the traveling speed is increased, the tilling pitch becomes coarse. Therefore, in order to obtain the tilling pitch as in the case of low speed traveling, the PTO transmission is changed to change the rotary speed of the rotary. You have to raise it too. However, if the speed is changed at a high speed, the load becomes large, and there is a limit to increase the speed, and it is very difficult to match the traveling speed with the PTO rotation. Then, this invention aims at providing the tilling apparatus which can perform favorable tilling work, even if running speed is raised, without changing the rotation speed of a rotary tilling apparatus.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of plowing pawl bases having mounting portions on substantially the same plane in a plowing pawl mounting portion on a plowing pawl shaft of a rotary tilling device. Positions are arranged in a plurality of rows on the tilling claw shaft, the rows of the respective tilling claws are alternately arranged rightward and leftward, and the mounting angle difference between the respective tilling claws is set large and small alternately. Further, the tilling claw shaft to which the above-mentioned tilling claws are attached is a holder type, and a phase difference is provided between the tilling claws and the tilling claws in the adjacent row.

[0005]

By using such a means, even when the traveling speed is increased during the tilling work, the crushing property does not become rough and there is a phase difference between the adjacent tilling claws, so that at the same time. Since there is no cutting, and the bending direction of the tilling claws alternates on the left and right on the same plane, the soil can be cultivated evenly without being unevenly raised when the soil is inverted.

[0006]

The problems and configurations to be solved by the present invention are as described above, and one embodiment of the present invention shown in the accompanying drawings will be described below. 1 is a side view of a rotary tiller, FIG. 2 is a plan view partially sectional view of the same, FIG. 3 is a developed view of a tiller shaft, and FIG.
4 is an enlarged rear view of the tillage claw shaft, FIG. 5 is a view taken in the direction of the arrow X in FIG. 4, FIG. 6 is a side view showing a state where six tillage claws are mounted on one plane, and FIG. 7 is a view taken along the line YY in FIG. FIG. 8 is a sectional view, FIG. 8 is a side view of the holder 12b, FIG. 9 is a rear view of the rotary when four tillage claws are mounted on one plane, and FIG. 10 is a side view showing a mounting position relationship of the holder on the tillage claw shaft. .

An embodiment in which a tillage claw of the present invention is attached to a side drive type rotary tiller attached to a tractor will be described with reference to FIGS. 1 and 2. The rotary tiller has a gearbox 1 arranged at the center, an input shaft 2 is projected forward from the gearbox 1, and the input shaft 2 is connected to a PTO shaft of a tractor via a universal joint or a drive shaft to generate power. I try to tell you. The gear box 1
Beams 3 and 3 are projected to both sides from the side surface, support plates 4 and 4 are fixedly mounted on both sides of the gear box 1, and pins for connecting lower links are projectingly provided at front ends of the support plates 4 and 4. The front end of the depth frame 5 is pivotally supported at the rear end, and further,
A support stay 6 is interposed between the front side portions of the support plates 4 and 4 and the mast 7, and a pivotal portion of the top link is formed at the front end of the mast 7.

An upper part of the chain case 10 and an upper part of the side support are fixed to the outer ends of the beams 3 and 3, and a plowing claw shaft 12 is horizontally installed between the lower part of the chain case 10 and the lower part of the side support 11, and the plowing claw is provided. A large number of plowing claws 13, 13 ... Consisting of the inventive claws of the present invention are radially planted on the shaft 12 in a side view, and the upper part of the rotation locus A of the plowing claw 13 is covered with the plowing cover 20. Is covered with a side cover 21, and a rear cover 22 is connected to the rear end of the tilling cover 20. Further, the tiller claw shaft 12 is provided with a bevel gear 23.2 in the gear box 1 from the input shaft 2.
4 is driven via the transmission shaft 25 in the beam 3, the sprockets 26 and 27 in the chain case 10, and the chain 28, and the plowing pawls 13 and 13 ... Are rotated to enable plowing.

.. are fixedly provided in front of the midpoints of the beams 3 and 3, and the support rods 15 are horizontally installed at the front ends of the plates 14 and 14 ... The mounting plates 16, 16 ... Are fixed to the mounting plate 16 by external fitting so that the cutting blades 17 are attached to the mounting plate 16.
The upper part of is fixed for height adjustment. Although four cutting blades 17 are attached in this embodiment, the number of cutting blades 17 to be attached is not limited. The cutting blade 17 has a straight upper portion, a lower portion curved rearward, and the lower portion of the cutting blade 17 is arranged so as to overlap with the front portion of the rotation locus A of the tiller 13 in a side view. There is.

Further, in a front view, the cutting blade 17 is arranged between the tilling claw 13 and the tilling claw 13 so that the cutting blade 17 and the tilling claw 13 do not interfere with each other when the tilling claw shaft 12 is rotated. The interval between the cutting blade 17 and the tilling claw 13 is narrowed to prevent residual tillage. However, the cutting blade 17 is not provided between the plowing claws 13 and all of the plowing claws 13, and when the plowing claws 13 are six in one row (one plane) described later, as shown in FIG. It is provided between the row and the row inside thereof and inside the row two rows away from the cutting blade 17. Also,
When there are four tillage claws 13 in one row, as shown in FIG. 9, between the rows at both ends and the inside row, and the cutting blade 17 thereof.
The cutting blades 17 are provided on the inner side in three rows, and four cutting blades 17 are provided symmetrically in this embodiment, and the number thereof is not limited. The cutting blades 17 may be provided between the second and third rows from both sides, and the cutting blades 17 may be provided in two or three rows. By providing the cutting blade 17, the plowing traveling speed can be increased.

Then, the rear surface of the cutting blade 17 and the cultivating cover 2
The partition plate 19 is disposed between the partition 0 and the partition plate 19 is fixed to the back surface of the cutting blade 17, and the space between the upper part of the partition plate 19 and the inner surface (rear surface) of the tilling cover 20 is made extremely small. Board 1
9 is brought close to the tilling cover 20 so that straw, weeds, etc. do not get in and get entangled.

Next, the mounting structure of the plowing claw 13 which is the main part of the present invention will be described. When attaching the plowing pawls of the rotary plowing device to the plowing pawl shaft, a disc-shaped flange is fixed to the plowing pawl shaft in several rows, and one or more plowing pawls are radially fixed to the flange, and a plowing pawl. There is a holder type in which the U-shaped or square pipe-shaped holders are arranged radially on the plowing claw shaft in a side view by changing the phase one by one on the same plane perpendicular to the axis. It is common for books or two tillage claws to be attached.
In the present invention, the tiller claw 13 is a holder type and the tiller claw shaft 1 is used.
A plurality of rotary cultivators (4 or 6 in the present embodiment) are provided on the same plane perpendicular to the direction 2, and the rotary cultivator does not need to increase the rotation speed of the rotary even when traveling at high speed. ing.

First, a case will be described in which six pieces are provided on the same plane (hereinafter, one row). As shown in FIGS. 2 to 8, the both ends around the tillage claw shaft 12 have holders 12a, 12a, 1 at every 120 ° in a row as shown in FIGS. 3, 4, and 5.
2a is provided so as to project in the radial direction, and between the rows at both ends thereof,
As shown in FIGS. 6 and 7, six holders 12a in a row
.. 12b ... is projected, and the mounting portion 1 of the tillage shaft 13
3a are located on substantially the same plane, and the holders 12a, 12a, 12a and the holder 12b.
2b and 12b are respectively provided to project in the radial direction from the tillage claw shaft 12 every 120 °, and the adjacent holders 12a and 12b are alternately arranged, and the mounting angles of the respective holders are not equal. That is, the mounting angle difference between the adjacent holders 12a and 12b is set to be large and small.

Then, the holder 12b is attached to the holder 1
In order to bring it closer to 2a and project in the same plane, as shown in FIG. 8, the center side of the holder 12a is formed as a notched holder 12b, and the notched portions 12c and 12d at both ends are formed on the front surface or the rear surface of the holder 12a. By abutting and fixing, the mounting intervals of the holder 12a and the holder 12b have different angles on both sides thereof. As shown in FIG. 3, the holders 12a, 12b, ... Attached in this manner are provided with a phase difference such that the attachment angles are slightly different for each row, and the center lines of the holders do not match in side view. As described above, the radial setting is performed, and at the same time, the plowing claws 13 are prevented from entering the field scene to disperse the force.

The inner holder 12a other than the both ends
・ 12b ... is a plowing claw 13 ・ 13 consisting of nata claws
.. is attached, and the tip portion is curved to the right or left in order to invert the soil after cutting into the tilling claw 13,
The holders 12a, 12b, ... Are mounted in a row so that the curving directions are alternated to the left and right.

Next, an embodiment in which four tillage claws 13 are mounted in a line will be described with reference to FIGS. 9 and 10. The mounting structure of the plowing claws at both ends is the same as the above, and the mounting structure of the plowing claws on the inside is the same as the mounting structure of the plowing claw shaft 12 in which the holders 12a and 12a and the holders 12b and 12b are projected on the same plane. The mounting portions 13a of 13 are located on substantially the same plane, and the holders 12a, 12a and the holders 12b, 1
2b are 180 ° out of phase with each other, and holder 1
The phase difference θ1 between the 2a and the holder 12b is a value other than 90 °, the phase differences θ1 and θ4 are not set at equal intervals, and the phase differences θ1 and θ4 between the holders 12a and 12b in the adjacent rows are set to be different, At the same time, the plow claws are kept from cutting into the field.

Then, each of the holders 12a and 12
.. are mounted such that the curving directions of the plowing claws are alternated to the left and right, that is, the plowing claws are facing left and the plowing claws are facing right.
The phase difference θ2 (with respect to) and the phase difference θ3 (with respect to) with the adjacent tillage claw are 90 °.

[0018]

Since the present invention is configured as described above, it has the following effects. That is, since a plurality of plowing pawls are arranged on the same plane perpendicular to the plowing pawl axis, the plowing pitch does not become rough even if the traveling speed becomes fast, and a plurality of plowing pawls on the same plane can be mounted. Since the angle difference is large and small and the bending direction of the tilling claw is alternating, the cutting force in the traveling direction of the tilling claw with a small mounting angle difference is reduced, and horsepower loss can be reduced. In addition, since there is a phase difference between the adjacent row of tilling claws, the fields are not cut at the same time, and the force is not dispersed and a large load is not applied.

[Brief description of drawings]

FIG. 1 is a side view of a rotary tiller.

FIG. 2 is a partial sectional view of the same plan view.

FIG. 3 is a development view of a tillage claw shaft.

FIG. 4 is an enlarged rear view of the tillage shaft.

5 is a view on arrow X in FIG. 4. FIG.

FIG. 6 is a side view showing a state in which six tillage claws are mounted on one plane.

FIG. 7 is a sectional view taken along the line YY in FIG.

FIG. 8 is a side view of the holder 12b.

FIG. 9 is a rear view of the rotary in the case where four tillage claws are mounted on one plane.

FIG. 10 is a side view showing a mounting position relationship of the holder on the tillage claw shaft.

[Explanation of symbols]

 A Rotation locus 12 Plowing claw shaft 12a ・ 12b Holder 13 Plowing claw 13a Mounting part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toko Takahashi 1-32, Chaya-cho, Kita-ku, Osaka-shi, Osaka Prefecture Yanmar Diesel Co., Ltd. (72) Takashi Hirano 1-32, Chaya-cho, Kita-ku, Osaka-shi, Osaka Yanmar Diesel Co., Ltd. (72) Inventor Masaru Yamamoto 1-1-1, Ishishiba, Matsumoto-shi, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Plant (72) Inventor Mitsutoshi Miyazaki 1-1-1, Ishishiba, Matsumoto-shi, Nagano Prefecture Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto factory

Claims (3)

[Claims] 1. A tilling claw mounting portion on a tilling claw shaft of a rotary tiller, wherein mounting portions of a plurality of tilling claw bases are located on substantially the same plane, and a plurality of rows are arranged on the tilling claw shaft to form one row. The rotary tilling device is characterized in that the respective tillage claws are alternately arranged rightward and leftward, and the mounting angle differences of the respective tillage claws are alternately set to large and small. 2. A rotary tiller according to claim 1, wherein the tiller shaft to which the tiller according to claim 1 is attached is a holder type. 3. The rotary cultivating device according to claim 1, wherein a phase difference is provided between the rotary and the cultivating claw in the adjacent row.