JPH09298903A - Tilling tine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilling tine, having reduced tilling vibration and power consumption. SOLUTION: This tilling tine comprises a mounting base part 11, a vertical blade part 13 and a horizontal blade part 14. The tine is bent in the opposite direction to the rotational direction from the vertical bend part 13 to the horizontal bent part 14, and the horizontal blade part 14 is bent in one side with a roughly constant radius of curvature. The bend-starting part 15 of the horizontal blade 14 is at a site slightly approaching the front end from the half in the longitudinal direction of the tine. A blade edge part 13A of the vertical blade 13 is made longer than the blade edge part 14A of the horizontal blade part 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling pawl used by being attached to a pawl shaft (plow tiller) of a rotary tiller, for example, and more particularly to a tilling pawl suitable for performing tilling work in a paddy field or a field. Is.

[0002]

2. Description of the Related Art As a tilling claw for performing tilling work, as disclosed in, for example, Japanese Utility Model Laid-Open No. 58-55402 and Japanese Utility Model Laid-Open No. 58-113301.
A tilling claw having a mounting base portion, a vertical blade portion, and a horizontal blade portion, which bends in the length direction from the vertical blade portion to the horizontal blade portion and gives a twist from the vertical blade portion to the horizontal blade portion. It is known that the horizontal blade portion is curved in a circular arc shape in the width direction.

However, in the above-mentioned conventional tillage claws,
When a part with a twist or a part curved in an arc shape is driven into the soil, the plowing resistance increases, the required power increases, and vibration easily occurs, which adversely affects the rotary tiller and tractor. There was a drawback. Therefore, one of the applicants of the present invention is Japanese Patent Laid-Open No. 62-
In Japanese Patent Laid-Open No. 87002, there is proposed a tilling claw that solves the above-mentioned problems of the conventional tilling claw, and it is put into practical use and is well received in the industry.

That is, as shown in FIGS. 6 (1), (2) and FIG. 7, it has a mounting base portion 2, a vertical blade portion 4 and a horizontal blade portion 5, and the vertical blade portion 4 to the horizontal blade In the tillage claw 1 curved in the lengthwise direction over the portion 5 and curved in one side in the lengthwise direction with a substantially constant curvature, from the vertical blade portion 4 to the ridge edge side of the tip portion of the horizontal blade portion 5. One side direction in the length direction A tilling claw 1 characterized by forming a warping part 7 having a suction angle θ slightly warped on the side opposite to the curving direction. By forming the warping part 7, The soil was well removed, the soil did not adhere much, and the plowing work was carried out with high efficiency as a whole (conventional example 1).

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention 1 conventional tiller claw 1
Has a certain degree of usefulness, but it is even more useful if the following problems can be solved. That is, the horizontal blade portion 5
The bending start portion 8 of (the bent portion having the rake face 5A) is slightly closer to the mounting base 2 side than the half in the lengthwise direction of the claw, and the blade edge portion 6A of the vertical blade portion 4 is the blade edge of the horizontal blade portion 5. Since the length is shorter than that of the portion 6B (the maximum turning radius Rm is 245 mm and the horizontal length L is 79.5 mm), the following problems occur.

The cutting into the soil is performed from the straight portion (vertical blade portion 4) and the lateral force is supported by the straight portion. Therefore, when the blade edge portion 6A is short, the cutting into the soil (vertical cutting portion) is performed. ) Is running out,
On the other hand, since the blade edge portion 6B is long, the lateral force (the force in the axial direction of the claw shaft) becomes too large, the plowing load is large, and the horsepower consumption is large. Since the rake face 5A is wide and the radius of curvature r is as long as 120 mm, the rake angle is gentle and the soil hugging the soil is weak, while the mass of the horizontal blade portion 5 is the vertical blade portion 4
In addition, since the inertial force also becomes large and causes vibrations, the shape of the tip of the horizontal blade portion 5 is rounded 5B, so that the weight is excessive and substantially 1 Had a claw weight of 640 g, excessively consumed horsepower, and caused a vibration factor.

In view of this, the present invention provides a tilling claw capable of reducing the tilling vibration and the horsepower consumption by devising the bending start portion and the tip shape of the side blade portion and reducing the radius of curvature of the side blade portion. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION The present invention is a mounting base 11.
And a vertical blade portion 13 and a horizontal blade portion 14, which are curved in a direction opposite to the rotation direction from the vertical blade portion 13 to the horizontal blade portion 14, and the horizontal blade portion 14 is curved to one side. The following technical means are taken in order to achieve the above-mentioned object in the tilling nail 10 currently used.

That is, in the present invention according to claim 1, the bending start portion 15 of the horizontal blade portion 14 is slightly closer to the tip end side or half than the half in the lengthwise direction of the horizontal pawl from the vertical line passing through the mounting base 11. Thus, the blade edge portion 13A of the vertical blade portion 13 is longer than or substantially the same as the blade edge portion 14A of the horizontal blade portion 14, and such a configuration is adopted. As a result, the rake face 1 of the horizontal blade portion 14 is provided while reliably supporting the lateral force while sufficiently securing the vertical cutting depth of soil by the blade edge portion 13A of the vertical blade portion 13.
It was possible to secure the hugging and releasing of soil in 4B, and to reduce plowing vibration and consumption horsepower (claims 1 to 3).

Further, in the present invention, the tip of the horizontal blade portion 14 is formed in the unequal angle chevron 16 and the top 16C of the chevron 16 is formed.
Since the ridge is offset toward the ridge portion 17, the mass of the horizontal blade portion 14 can be reduced, and as a result, vibration factors can be suppressed and consumed horsepower can be reduced (claim 4). By the way, the weight of one of the tillage nails 10 is 600 g, which is lighter than the conventional example 1, and since the number of nails is usually about 36,
The total weight was reduced by 1440 g, which reduced dynamic vibration and drastically reduced horsepower consumption.

Further, in the present invention, the radius of curvature r of the horizontal blade portion 14 is set to be slightly shorter than or substantially the same as the horizontal length L from the mounting base portion 11 to the bending start portion 15. Even if the area of the rake face 14B was small, the hugging of the soil was secured, the traverse load of the soil was reduced, and the load of the soil was reduced while the soil was thrown out, making it suitable for the tilling work. (Claim 5).

Further, in the present invention, the center of the wall thickness of the vertical blade portion 13 in the state of being attached to the pawl shaft is perpendicular to the pawl shaft, and the pawl thickness t is defined by the mounting base portion 11 and the vertical blade portion 13. Connection part 12
Is the maximum pawl thickness, and the thickness is gradually reduced from the vertical blade portion 13 toward the horizontal blade portion 14,
The strength of the connecting portion 12, which exerts the greatest effect, is secured by the load when the nail is driven into the soil, and the durability is excellent (claim 6).

Further, in the present invention, the long side 16A of the unequal angle chevron 16 formed at the tip of the horizontal blade portion 14 is the mounting base portion 1.
Since it is almost parallel to the vertical line passing through 1, the rake face 14B can surely hold the soil, improve the crushing action, and secure the release of the soil, which is ideal for tilling work. There is (claim 7). Further, in the present invention, the horizontal blade portion 1 is provided on the ridge portion 17 side at the tip portion of the horizontal blade portion 14.
By forming the warped portion 18 with a suction angle that is warped to the side opposite to the curving direction of 4, the wasteful soiling is improved and the soil is less adhered to the nails. As a result, it is possible to further reduce the consumption of horsepower (claim 8).

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The tiller 1 according to the present invention
0 is used for a tractor-mounted side drive type or center drive type rotary tiller, a rotary tiller for a tiller, and the like.

In FIGS. 1 and 2, the tillage claw 10 is made of, for example, SUP6 and has a mounting base 11 having a rectangular cross section (see FIG. 3) having a mounting hole 11A, and a connecting portion 12 is provided on the mounting base 11. A vertical blade portion (straight portion) 13 and a horizontal blade portion (bent portion) 14 are continuously provided via the above. Plowing claw 10
The mounting base 11 is attached to the claw shaft (the reference numeral O in FIG. 1 (1) is the center of the claw shaft) by bolt fastening means or the like and rotated in the arrow X direction to perform the tilling work. The blade portion 13 to the side blade portion 14 is curved in a direction opposite to the rotation direction, and the side blade portion 14 is curved to one side with a substantially constant radius of curvature r, specifically, a radius of 100 mm to form a rake face. 14B is formed.

Each of the vertical blade portion 13 and the horizontal blade portion 14 is formed with blade edge portions 13A and 14A having a substantially constant width, and these blade edge portions 13A and 14A are shown in FIGS. As described above, the blade is a single-edged blade or a double-edged blade. In the case of a double-edged blade, it is desirable that the angles are different as shown in the drawing, but they may be equiangular. The plunge claw 10 is rotated in the arrow X direction to cut into the soil, so that the blade edge portion 13A of the vertical blade portion 13 is formed.
Since the claws themselves support the lateral force and at the same time prevent entanglement of weeds and the like, the blade edge portions 13A and 14A have an appropriate entanglement angle.

The horizontal length L from the bending start portion 15 of the horizontal blade portion 14, specifically, the vertical line passing through the mounting base 11, is slightly closer to the tip side or half of the half in the lengthwise direction of the pawl, and is vertical. The blade edge portion 13A of the blade portion 13 is the blade edge portion 14A of the horizontal blade portion 14.
The length is longer than or substantially the same as the length of the blade edge of the blade edge 13A, and the blade edge portion 13A sufficiently supports the lateral force at the time of vertical cutting, and the blade edge portion 14A reduces the transverse cutting resistance. , The horsepower consumption is reduced (in the figure, the horizontal length L is a little closer to the tip end side than half in the nail length direction, but the same length may be used).

The tip of the horizontal blade portion 14 has a long side 16A and a short side 1
It is formed in the unequal angle mountain shape 16 composed of 6B, and the top portion 16C of the mountain shape 16 is offset to the ridge portion 17 side. As a result, the mass of the horizontal blade portion 14 is reduced, the horsepower consumption can be reduced, and the factors of dynamic vibration are reduced. Further, the radius of curvature r of the horizontal blade portion 14 is set to be slightly shorter than or substantially the same as the horizontal length L, so that the rake angle (bending angle ε) of the rake face 14B is more than that of the conventional example 1. By raising the rake face 14B, it is possible to secure the hugging of the soil and ensure that the rake face is thrown away, while the rake face 14B has an area equal to that of the conventional example.
It is made narrower to reduce the resistance to soil, which suppresses vibration factors and reduces horsepower consumption.

Further, in the cultivating claw 10 in a state in which it is mounted on the claw shaft, the center plane of the wall thickness of the vertical blade portion 13 is perpendicular to the claw shaft, and the pawl thickness t is the mounting base portion 11 and the vertical blade portion 13. The connecting portion 12 with and has the maximum pawl thickness, and the vertical blade portion 13 to the horizontal blade portion 14
The thickness is gradually reduced as it goes to. Specifically, the thickness of the mounting base 11 is 10 ± 0.3 mm, the connecting portion 12 is 11 ± 0.3 mm, and the tip thickness t1 is 4 ± 0.3 m.
It is supposed to be m.

As a result, the connecting portion 12 can sufficiently withstand the bending when the vertical blade portion 13 cuts into the soil, and the durability is improved, and as the plowing depth gradually increases. As a result, cutting resistance is reduced, and in this respect also, vibration factors and horsepower consumption are reduced. Further, the long side 16A of the unequal angle chevron 16 formed at the tip of the horizontal blade portion 14 is made substantially parallel to the vertical line passing through the mounting base portion 11, and on the ridge portion 17 side, the curved direction of the horizontal blade portion 14 is curved. A warped portion 18 is formed with a suction angle that is warped to the opposite side.

Specifically, as shown in FIG. 4, the radius of curvature r1 of the warped portion 18 is 200 mm, which is 30 m from the blade edge.
It is bent back from the position of the blade width T of m. As a result, it is possible to improve the soil separation by the rake face 14B and reduce the soil adhesion while reducing the implantation resistance and the soil passage resistance.

[0022]

【Example】

Maximum turning radius Rm: 245 ± 2 mm Horizontal length L: 106.9 mm Curvature radius r: 100 mm Bending angle ε: 57 ° Cutting width ωc: 65 ± 3 mm Curvature radius r of curving part r: 200 mm Pawl thickness t: 10 ± 0.3mm Pawl thickness t1: 4 ± 0.3mm Blade edge width: 12mm R1: 30mm R2: 90mm R3: 72mm R4: 135mm R5: 120mm R6: 155mm However, the definitions of R1 to R6 are new edition agricultural machine handbooks. It is based on the napping design example described on page 428, and the cutting angle α, the clearance angle β, the wedge angle δ, the cutting angle γ, the receding angle λ, etc. are based on the above-mentioned napping design example. There is.

When the plowing claws of the above size and shape were made of the material SUP6 and 36 claw shafts were attached (however, one by one) and the load characteristics were measured, vibration and consumption were more than those of the conventional example 1. I was able to save a lot of horsepower. The conventional example 1 is the same as the example of the present invention except that L is 79.5 mm and γ is 120 mm.

[0024]

As described in detail above, according to the present invention, it is possible to provide a plowing claw that ensures plowing work while significantly reducing plowing vibration and horsepower consumption.

[Brief description of drawings]

1 shows an embodiment of the present invention, (1) is a side view,
(2) is a bottom view.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a view showing an arrow C in FIG. 1 (2).

5 is a sectional view taken along line BB in FIG. 1 (1), where (1) is the first embodiment and (2) is the second embodiment.

FIG. 6 shows a conventional example, (1) is a side view and (2) is a bottom view.

FIG. 7 is a view showing an arrow E in FIG. 6 (1).

[Explanation of symbols]

 10 Tilling Claw 11 Mounting Base 13 Vertical Blade 13A Blade Edge 14 Horizontal Blade 14A Blade Edge 15 Bending Start Site

(72) Inventor Hiroshi Sakane 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Tatsuya Maeyama 64, Ishizukita-machi, Sakai City Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (8)

[Claims] 1. A mounting base (11) and a vertical blade (13).
And a horizontal blade portion (14), and is curved in a direction opposite to the rotation direction from the vertical blade portion (13) to the horizontal blade portion (14), and the horizontal blade portion (14) is one side. In the tilling claw (10) that is curved in the direction of the horizontal claw length direction from the vertical line where the bending start portion (15) of the horizontal blade part (14) passes through the mounting base part (11), slightly toward the tip side. It is characterized in that the blade edge portion (13A) of the vertical blade portion (13) is made closer or half and is longer than or substantially the same as the blade edge portion (14A) of the horizontal blade portion (14). Plowing claws. 2. A mounting base portion (11) and a vertical blade portion (13).
And a horizontal blade portion (14), and is curved in a direction opposite to the rotation direction from the vertical blade portion (13) to the horizontal blade portion (14), and the horizontal blade portion (14) is one side. In the cultivating claw (10) which is curved, the bending start part (15) of the horizontal blade part (14) is approximately half of the horizontal claw length direction from the vertical line passing through the mounting base part (11). A tilling nail, wherein the blade edge portion (13A) of the vertical blade portion (13) and the blade edge portion (14A) of the horizontal blade portion (14) have substantially the same length. 3. A mounting base (11) and a vertical blade (13).
And a horizontal blade portion (14), and is curved in a direction opposite to the rotation direction from the vertical blade portion (13) to the horizontal blade portion (14), and the horizontal blade portion (14) is substantially constant. In a tilling claw (10) curved to one side with a radius of curvature, a horizontal claw length direction from a vertical line where a bending start portion (15) of the horizontal blade part (14) passes through a mounting base part (11). Slightly closer to the tip side than half of the vertical edge (13)
A) A tilling claw, wherein A) is longer than a blade edge portion (14A) of the lateral blade portion (14). 4. The tip of the horizontal blade portion (14) has an unequal angle mountain (1
The peak portion (16C) of the chevron (16) is formed in 6) and is offset toward the ridge (17) side.
The tillage nail according to any one of 3 to 3. 5. The radius of curvature (r) of the lateral blade portion (14) is slightly shorter than or substantially the same as the horizontal length (L) from the mounting base portion (11) to the bending start portion (15). The tillage nail according to any one of claims 1 to 4, which is characterized by being provided. 6. The thickness center plane of the vertical blade portion (13) is perpendicular to the pawl shaft when attached to the pawl shaft, and the pawl thickness (t) is
Is a connecting portion (1) between the mounting base (11) and the vertical blade (13).
The maximum thickness is 2), and the thickness is gradually reduced from the vertical blade portion (13) toward the horizontal blade portion (14), and the thickness is formed gradually. Plowing claws. 7. The long side (16A) of the unequal angle chevron (16) formed at the tip of the horizontal blade (14) is substantially parallel to a vertical line passing through the mounting base (11). The tillage nail according to any one of claims 1 to 6. 8. The warp portion (1) is provided with a suction angle on the tip of the side blade portion (14) on the side of the ridge (17) which is opposite to the curving direction of the side blade portion (14).
8) is formed, The tilling nail according to any one of claims 1 to 7.