JPH0642405Y2 - Tillage claws by upcut cutting method - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a tillage claw by upcut tillage, and more specifically, in an upcut tillage suitable for deep tillage rotary tillage, the shape of the tillage claw is improved in order to improve the rearward throwing effect of the cut and tilled soil mass. It was done.

[Prior art]

Generally, a rotary tiller is equipped with a tillage claw on a rotary shaft via a claw attachment portion, and by rotating the rotary shaft forward with respect to the traveling direction,
The so-called down-cut cultivation method for performing work such as crushing soil and scraping, and the rotary shaft equipped with the tillage claws reversely rotate with respect to the traveling direction, whereby the tillage claws cut the soil from the bottom of the tillage toward the ground surface. The so-called up-cut method, which involves plowing and crushing work, is known.

[Problems to be solved by the device]

The upcut cultivation method in the rotary tiller is
Although the plowing energy and specific energy are smaller than those in the downcut cultivation method, since the plowing reaction force is directed rearward, the traction resistance to the tractor is increased, and if the cutting soil by the tilling claw is not thrown backward, the soil mass is lost. Remains in the rotary working area and is re-plowed, which increases the tilling energy. Therefore, the conventional up-cut tillage method has a small cutting resistance as compared with the down-cut tillage method, and has an advantage that it can be deep tilled, but has many practical problems such as poor backward throwing effect of cutting soil. , Is causing the delay in spread. The present invention has been made in order to improve the drawbacks in the above-mentioned conventional up-cut cultivation method, and the number of tilling nails and (EN) Provided is a tillage claw by an up-cut cultivation method for reducing the required torque, enlarging the cutting soil mass, and improving the rearward throwing effect of the cutting soil.

[Means for Solving the Problems]

In order to achieve the above object, according to the present invention, in the tiller 1 for performing tilling work by the upcut tillage method, the tiller mounted on the rotary that rotates below the axis O of the rotary shaft 5 near the ground surface. The claws 8 are held parallel to each other at a predetermined interval and curved inward so as to gradually rotate away from the mounting portion toward the rear side. A gate-shaped horizontal blade portion 8b is integrally formed by bending the blade at a substantially right angle with a width, and the starting end portion of the horizontal blade portion 8b is cultivated attached to the axis O of the rotary shaft and the rotary shaft 5. A straight line m passing through the center of the mounting hole 8f of the claw 8
The scoop is located at the intersection of the line n tilted further backward by about 10 degrees and the claw rotation radius R, and the side of the horizontal blade 8b has a concave inner surface on the inner side and a mounting surface on the outer side to smoothly curve. It is characterized by forming a surface.

[Action]

Based on the above configuration, the tillage claw by the up-cut tillage method according to the present invention, as the cultivated soil is cut from the bottom of the tillage toward the surface of the earth, the cut clay mass becomes a sliced shape by the horizontal blade portion 8b. While sliding on the rake face of the part, it does not remain in the working area of the rotary and is rotated in the direction opposite to the rotary shaft and thrown backward. The plowing soil mass is thrown backward without accumulating on the front of the rotary shaft, and the length of the horizontal blade part allows the cutting soil mass to be increased, and the tractor can be pulled even if the number of tillage claws is reduced. The resistance does not increase and deep cultivation is possible.

【Example】

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view showing a schematic structure of a tilling device suitable for upcut cultivation according to the present invention, FIG. 2 is a side view showing a shape of a tilling claw according to the present invention, and FIG. 3 is a II- of FIG. II cross section, FIG. 4 is a perspective view of FIG. 2. In the figure, the tilling device indicated by reference numeral 1 is vertically movable via a three-point link hitch mechanism at the rear part of the agricultural tractor (not shown). The gearbox 2 is mounted and provided in the center of the machine body. An input shaft 3 is provided in the gear box 2 so as to project forward, and is connected to a PTO shaft of a tractor via a transmission shaft, a universal joint, etc., and a driving force is transmitted. The driving force transmitted from the input shaft 3 is reduced by a gear reduction mechanism or the like in the gear box 2, and is transmitted to the rotary shaft 5 axially supported on both sides of the lower end of the chain case 4 via the chain in the chain case 4. It is adapted to be transmitted as a driving force for forward rotation or reverse rotation. Here, the rotary shaft 5 is extended so as to be orthogonal to the traveling direction of the tiller 1, and the direction of rolling in the traveling direction is referred to as forward rotation and the reverse thereof is referred to as reverse rotation. The shaft 5 is driven so as to rotate in the reverse direction. Further, the rotary shaft 5 is a center drive system extending left and right of the chain case 4 installed at the center of the plowing width, the chain case installed at one end of the plowing width, and the support frame on the other end side. At least one or more rotary shafts 5 are mounted on a plurality of chain cases 4 installed in a range of a fixed plowing width, or a side drive system axially supported between
It is driven by a cassette drive system or the like, which is supported by a shaft, and a drive system suitable for various tillage conditions is selected. On the other hand, the pawl mounting portion 6 is fixed to the rotary shaft 5 by welding or the like while maintaining a predetermined space in the lateral direction and the circumferential direction, and the pawl mounting portion 6 is orthogonal to the rotary shaft 5. A tilling claw 8 is fixed to a mounting hole, which is attached and formed at the tip end, through a bolt, a nut 7, and the like. The tilling claw 8 is, as shown in FIGS. 2 to 4,
The pair of left and right symmetrical vertical blades 8a, 8a, which are held in parallel at a predetermined interval and which are curved so as to gradually rotate away from the mounting portion to the claw mounting portion 6 toward the rear of the rotation, are substantially perpendicular to the inside at the tip end. A long horizontal blade portion 8b is formed in a gate shape by bending into a gate shape, and blade edges 8c, 8d are formed on the side edges in the rotation direction of the left and right vertical blade portions 8a, 8a. There is. That is, the tiller claw 8 is formed in a wide gate shape by a pair of left and right symmetrical vertical blade portions 8a, 8a and a horizontal blade portion 8b, and the horizontal blade portion 8b is formed by the vertical blade portions 8a, 8a on both sides. Holds the strength of. The front end part of the rotary front forming the horizontal blade part 8b of the tilling claw 8
8e is a mounting hole for the rotation center O of the rotary shaft 5 and the tillage claw 8.
By a straight line m passing through the center of 8f, rotate backward α degrees (approximately 10
The horizontal blade portion 8b is formed so as to be located at the intersection of the inclined line n and the claw rotation radius R, and to have an arc-shaped smooth rake face of radius r. Further, the blade edge 8d formed on the back face of the rake face of the horizontal blade portion 8b is a starting end portion of the horizontal blade portion 8b.
It is formed along a straight line P having an obtuse angle θ with a line n passing through 8e and the rotation center O. Here, the embodiment in which the horizontal blade portion 8b of the tilling claw 8 is integrally forged with the vertical blade portion 8a has been described, but in order to improve the strength of the base portion of the tilling nail 8, a round bar, a square bar, Horizontal blade part 8b welded to the pipe material, or a worn horizontal blade part
8b can be detachably fixed so that it can be replaced, and the horizontal blade 8b
It is also possible to adjust the mounting angle of. Further, since the arcuate rake face formed on the horizontal blade portion 8b of the tilling claw 8 is heavily worn, the wear resistance alloy is used particularly in the predetermined range of the rake face of the horizontal blade portion 8b and the vertical blade portion 8a. It is possible to employ a means for applying a different coating 9 or attaching two different layers of wear resistant materials. Chain case 4 for transmitting driving force to the rotary shaft 5
Is inclined so that the rotary shaft 5 side is closer to the traveling direction, and a soil adhesion preventing plate 10 made of an elastic material formed of rubber or plastic is attached in front of the chain case 4 as shown in FIG. Has been. Further, above the chain case 4 and below the gear box 2, there is mounted a rotary cover 11 suitable for the work of discharging the earth mass cut by the tilling claw 8 and thrown to the rear. Is a shield cover 12 installed above the pawl rotating portion, side covers 13 that cover both sides of the rotary shaft 5 in the plowing width, a front portion 14 installed in front of the shield cover 12, and a rear portion of the shield cover 12. The apron 15 is attached to the side cover 13 so as to be vertically movable, and the sub-side cover 16 is attached to the side cover 13 so as to be vertically movable. The shape of the shield cover 12 is a position slightly forward of the uppermost end position of the claw rotation locus so that the clearance between the tip of the tilling claw 8 and the shield cover 12 is minimized, and is inclined rearward from this to a divergent shape. It has been formed and is designed to improve the effect of throwing soil blocks by upcut cultivation. Next, the cultivating work of the upcut cultivating method using the cultivating device configured as described above will be described. First,
The tillage claw 8 is suitable for up-cut cultivation and has a horizontal blade portion 8b.
Is shaped like a long, wide gate, and this tiller 8
The rotary shaft 5 fixed to the chain case 4 is located near the front of the chain case 4, and the space in front of the chain case 4 is large. H / R (H
Is a plowing depth, and R is a claw turning radius). Therefore, as the tilling claw 8 cuts the cultivated soil from the bottom of the tillage toward the surface of the ground, the cut soil mass becomes a slice shape, and a crack occurs in the soil mass near the ground surface, and the horizontal blade portion 8b
While sliding on the rake face, the rotary shaft 5 is rotated in the opposite direction and thrown backward. At this time, a part of the cut soil mass is held in the rake face of the horizontal blade portion 8b and passes through the inside of the claw rotation locus, and the cut cultivated soil is thrown rearward without leaving it in the rotary working area. There is almost no clod deposited in front of the rotary shaft 5. Further, the earth mass thrown by the horizontal blade portion 8b hits the shield cover 12 behind the minimum clearance position slightly forward of the uppermost end position of the claw rotation path when it passes through the outer circumference of the claw rotation path, and crushes it. Since it is broken and falls behind the rotary shaft 5, no clods that increase running resistance and traction resistance are accumulated in front of the chain case 4 and in front of the rotary shaft 5. On the other hand, in the above-mentioned tilling claw 8, the horizontal blade portion 8b is formed wide,
Since it is supported by the vertical blade portions 8a on both sides, the strength of the claw is sufficiently maintained even if the cutting mass is large.

[Effect of device]

As described above in detail with reference to the embodiments, the upcut tillage claws according to the present invention are held in parallel at a predetermined interval, and are curved left and right so that they gradually rotate away from the mounting portion toward the rear. Inward from the tip of the vertical blade portion 8a, the gate-shaped horizontal blade portion 8b is integrally formed by bending at a substantially equal width to the width of the tip portion of the vertical blade portion 8a, and the horizontal blade portion 8b.
The starting end of the rotary shaft 5 and a radius n of the rotary shaft R of the rotary shaft 5 and a line n inclined approximately 10 degrees backward from a straight line m passing through the center of the mounting hole 8f of the tilling claw 8 mounted on the rotary shaft 5. And the lateral blade portion 8b is formed with a rake surface having a concave inner surface on the inner side and a convex surface on the outer side and smoothly curving, and the axis O of the rotary shaft 5 from the vicinity of the ground surface. The structure is such that it is rotated downward, the rearward throwing effect of the cut and tilled soil mass is improved, and the tilling energy is reduced without re-tilling the tilled soil, enabling deep tillage. Further, the tilling claw 8 according to the present invention has the horizontal blade portion 8b longer than the conventional claw, and in the tilled state, it is possible to make a relatively large cutting clod and reduce the number of the tilling claws 8 to be used. Therefore, it is possible to significantly reduce the required power of the tractor.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration diagram of a tilling apparatus suitable for upcut cultivation according to the present invention, FIG. 2 is a side view showing the shape of a tilling claw according to the present invention, and FIG. 3 is a II of FIG. -II
Sectional view, FIG. 4 is a perspective view of FIG. 2, and FIG. 5 is II of FIG.
It is an I-III sectional view. 1 ... tilling device, 2 ... gear box, 3 ... input shaft, 4 ... chain case, 5 ... rotary shaft, 6 ...
Claw mounting part, 7 …… Bolt / nut, 8 …… Tilling claw, 8a
…… Vertical blade, 8b …… Horizontal blade, 8c, 8d …… Blade edge, 8e …… Starting part, 8f …… Mounting hole, 9 …… Coating, 10 …… Soil adhesion prevention plate, 11 …… Rotary Cover, 12 ... shield cover, 13 ... side cover, 14 ... front part, 15 ... apron, 16 ... sub-side cover.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Yasukura 684 Nakatate Kobayashi Kogyo Co., Ltd., Okayama, Okayama (72) Inventor Kazuhiro Ishida 684 Nakatate Kotsubashi, Okayama, Okayama (72) Inventor Sakae Shibusawa 1-14 Nakabayashi, Nonoichi-cho, Ishikawa-gun, Ishikawa Prefecture (56) References Jikkou 39-19704 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A tilling device (1) for performing tilling work by an upcut tilling method, wherein a tiller claw (8) mounted on a rotary rotating below a vicinity of a ground surface (O) of a rotary shaft (5). ) Of the pair of left and right vertical blades (8a), which are held parallel to each other at a predetermined interval, and which are curved so as to gradually rotate away from the mounting portion toward the rear side. Gate-shaped horizontal blade part (8b) with a width equal to the width of the tip part and bent almost at right angles
Is integrally formed, and the starting end portion of the horizontal blade portion (8b) is connected to the axial center (O) of the rotary shaft.
And a straight line (m) that passes through the center of the mounting hole (8f) of the tilling claw (8) mounted on the rotary shaft (5), and is substantially rotated backward.
A rake that is positioned at the intersection of the line (n) inclined at 10 degrees and the turning radius (R) of the claw, and has a concave inner surface on the inside and a convex outer surface on the horizontal blade portion (8b) that smoothly curves. Tilling claw by up-cut cultivation method characterized by forming a surface.