JP3167090U - Cultivating rotary blade and cultivator with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary blade of a tractor excellent in rigidity, toughness and cutting power, which can surely excavate plant residues in soil while cutting it into an appropriate size. SOLUTION: In a cultivating rotary blade 100 which is mounted in a plurality of axial directions with respect to a rotating shaft rotated by the power of a tractor, a steel portion 120 having high hardness is provided on a blade surface side of a soft iron portion 110 serving as a base. A plurality of sawtooth-shaped cutting blades 130 are formed by making notches 131 into a double structure attached. A notch 131 is made so as to extend from the steel part 120 on the blade surface side to a part of the soft iron part 120, the tip part of the cutting blade 130 is the steel part 120, the root part is the soft iron part 110, and the hardness as a blade, It shall also have impact resistance to absorb the impact when colliding with a stone or the like in the ground. The cutting blade 130 is provided in the straight portion 101, and only about 0 to 2 cutting blades are provided in the soil raising portion 102 curved inward. [Selection diagram] Fig. 1

Description

  The present invention relates to a rotary blade of a tractor for excavating plant residue once buried in the ground in the cultivation of a field or the like.

  In fields and the like, large crop residues after crops are harvested are removed from the field, but residues such as root stocks, fine branches and leaves, and weeds must be plowed with a rotary blade of a tractor. In addition, farming methods are also widely used to plant forage in the soil by planting forsythia grass, etc., and to make the field fertile, but also in this case using a rotary blade of the tractor to pull out the root of the lotus root from the soil It is necessary to pour in.

This squeezing operation is performed by digging deeply into the soil by attaching a rotary blade to the rotation shaft of the tractor and rotating the rotation shaft while rotating the rotary blade in the soil.
In other words, the rotary blade of the conventional tractor digs up the residues of rice roots and lotus root that remain in the soil, and the tip of the rotary blade of the conventional tractor has a curved curved part, It is a movement to scoop out the soil to the curved side while lifting the soil upward with the curved portion.

A plurality of rotary blades are mounted along the rotation axis, and the digging work is performed by dug up the cultivated area of the tractor with a predetermined number of rotary blades.
For example, in the rotary blade disclosed in Japanese Patent Laid-Open No. 8-000003, three types of blades on the rotating shaft are sequentially arranged on the rotating shaft: a straight blade for cutting, a nata blade for crushed soil, and a blade blade for lifting. It is arranged one by one. In addition, a contrivance is made to make the rotation radius of the straight blade longer than the rotation radius of the blade and blade.

  By driving the rotating shaft, cutting the surface of the field with a straight blade, cutting the weeds and their roots to make it easier to break up, and then crushing and scraping with the nail and blade claw, It is pressed and molded by a molding plate.

JP-A-8-000003

With conventional tractors, it is possible to dig up without problems in the case of sufficiently soft soil, but in dry and hard fields such as fields and fields before flooding, the rotary blade enters the soil. A large force is required for the blade, a large force is applied to the blade, and a large horsepower is also required for the tractor. For this reason, the rotary blade may be bent or broken, and it may be impossible to move forward due to insufficient tractor horsepower. The tip of the rotary blade is curved so as to scoop up the soil from below, and the force acting on the rotary blade tends to increase more and more.
For this reason, when the tractor has been used for a while in the field, the rotary blade slipped down and became smaller, often requiring replacement.

  In addition, the residues of rice roots and lotus roots dug up by the rotary blade were caught in front of the rotating shaft and accumulated in the front, which also acted to weaken the forward force of the tractor. This phenomenon was a malfunction that occurred in any tractor. In particular, if the length of the excavated plant residue etc. is longer than the width of the rotary blade, it will not be discharged to the side even by the curved part, and it will move forward with the tractor while being caught on the rotary blade There was a bug.

  In other words, the rotary blades of conventional tractors are used to dig up the residues of rice roots and lotus roots, and not to cut the residues of rice roots or lotus roots to an appropriate length.

  The present invention eliminates the disadvantages of conventional rotary blades of tractors, reduces the problems of scrubbing or breaking the rotary blades that rotate at high speeds and scrape the soil. A tractor rotary blade that is hard and tough and excels in cutting power and can be exposed to the ground by cutting the plant residue in the soil to an appropriate size, and a tractor equipped with the rotary blade. The purpose is to provide.

  In order to achieve the above object, a plurality of rotary blades for tillage according to the present invention are attached in the axial direction with respect to a rotating shaft that is rotated by the power of a tractor, and a rotary blade for tilling for excavating plant residues in the field such as fields. In addition, a double structure in which a hard steel portion is attached to the outer peripheral side corresponding to the blade with respect to the soft iron portion serving as a base, and a plurality of sawtooth cutting blades are formed by making cuts on the outer peripheral side. It is characterized by that.

  With the above configuration, a double structure in which a steel part having a high hardness is attached to the outer peripheral side (the cutting blade side) with respect to the soft iron part serving as a base enters the soil and receives a large drag while suppressing manufacturing costs. Hardening can be achieved by providing a steel portion with high hardness on the outer peripheral side, and long rice roots and lotus roots can be cut short by providing a sawtooth-shaped cutting blade.

  Here, in the above configuration, the serrated cutting blade has a notch extending from the steel portion on the outer peripheral side to a part of the soft iron portion, so that the tip portion of the cutting blade is the steel portion, the root. It is preferable that the portion is the soft iron portion, and has both the hardness as a blade that enters the ground and the impact resistance that absorbs the impact when colliding with a stone or the like in the ground.

  With the above configuration, the protrusion portion that becomes the cutting blade can secure a double structure in which the tip portion is a steel portion having a high hardness and the root portion is a soft iron portion having a large toughness, while maintaining the rigidity of the cutting blade, Even if it hits a hard object such as a stone in the soil, it can absorb the impact.

In addition, in the said structure, it is preferable to devise so that the notch of the said serrated cutting blade may become deep from the rotating shaft side to the front end side.
Further, in the above configuration, it is preferable that the saw-tooth cutting blade is devised so that the distance between the cutting edge becomes narrower from the root side to the tip side.
Since the curve on the outer peripheral side of the rotary blade is applied to the cutting edge from the rotating shaft side and draws a gentle curve as it approaches the cutting edge, if the interval is narrowed from the rotating shaft side to the tip side, the notch will be on the outer peripheral side of each cutting blade. The angles entering the tangent line are close to each other, and the cutting edge of the cutting blade can be made substantially perpendicular or shallow with a sharp angle.

Here, in the above configuration, the sawtooth cutting blade is provided in a straight portion when viewed from the upper surface side of the blade, and only about 0 to 2 are provided in the raised portion curved inwardly, and the raised portion is provided. It is preferable to devise to provide a flat blade portion where the cutting blade is not provided in the portion.
With the above configuration, a cutting blade is provided at a linear portion that enters and rotates at a substantially right angle into the soil, and it is possible to dig up the soil while cutting plant residues such as rice roots and lotus root in the soil with the cutting blade. It can be done, and the curved raised portion is left as a flat blade, and the function of scratching the soil is not lost.

  The cultivator according to the present invention is equipped with the rotary blade for tillage described above. The so-called vehicle type may be a tractor type that a user gets on and drives, or may be a type that a user pushes and plows like a push car.

  The rotary blade for tillage of the present invention has a double structure in which a hard steel part attached to the outer peripheral side corresponding to the edge of the soft iron part as a base is attached to the soil while keeping the manufacturing cost down. Hardening can be achieved by providing a steel portion having a high hardness on the outer peripheral side that receives a large drag, and long rice roots and lotus roots can be cut short by providing a sawtooth cutting blade.

  Hereinafter, embodiments of the rotary blade for tillage of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to the specific applications, shapes, dimensions, and the like shown in the following embodiments.

The structural example of the rotary blade for tillage of this invention concerning Example 1 is shown.
FIG. 1 is a diagram showing a configuration example of a rotary rotary blade 100 according to the present invention.
As shown in FIG. 1, the rotary blade 100 for tillage has a configuration including a soft iron portion 110, a steel portion 120, a cutting blade 130, a flat blade 140, and a rotation shaft hole 150.

  The soft iron portion 110 may be a low-cost metal material such as soft iron, and is a metal plate having a certain degree of structural strength and toughness. As shown in FIG. 1, the outer shape is a circular arc shape as shown in FIG. 1. As shown in FIG. 1 (b), when viewed from the top, it extends linearly from the rotation axis, but curves in the left-right direction near the tip. is doing. A flat blade 150 is formed near the tip. Thus, since the base is a metal material such as soft iron, the cost of the rotary blade 100 for tillage is reduced.

  The steel part 120 is a metal material with high hardness, and has excellent wear resistance. The steel portion 120 is attached to the outer peripheral side corresponding to the blade surface with respect to the soft iron portion 110 serving as a base, and the rotary blade 100 for tilling has a double structure. Although the steel part 120 is a metal material with high hardness and high in cost, in this configuration, since the steel part 120 is attached only to the outer peripheral side corresponding to the blade surface of the rotary blade 100 for tillage, the increase in cost can be suppressed. it can.

  Next, as shown in FIG. 1, the cutting blade 130 is a blade formed by making a cut 131 with respect to the soft iron portion 110 of the base and the steel portion 120 of the blade surface, and the blade of the rotary blade 100 for tillage. A plurality of lines are provided on the line and are in a saw shape.

  The serrated cutting blade 130 is formed by making a cut from the steel portion 120 on the blade surface side to a part of the soft iron portion 110 of the base, and the tip portion of the cutting blade 130 is the steel portion 120 and the root portion. Is the soft iron part 110. As the cutting blade 130 has a double structure as described above, the steel portion 120 at the tip of the cutting blade 130 is given rigidity as a blade that enters the ground, and the soft iron portion 110 on the base side of the cutting blade 130 is provided. This provides impact resistance and toughness to absorb the impact when colliding with a stone or the like in the ground.

  If a tractor equipped with a rotary rotary blade 100 is operated and the rotary blade 100 is rotated at a high speed and the rice root and the lotus root are excavated, When there is a hard foreign matter, the cutting blade 130 of the rotary rotary blade 100 will collide violently at high speed, but the tip portion of the cutting blade 130 is formed of a hard steel portion 120 and the tip will not be crushed. . Furthermore, since the base of the cutting blade 130 is formed of the soft iron portion 110, it is excellent in impact resistance and toughness to absorb the impact, and the trouble that the cutting blade 130 is broken from the base is less likely to occur. Thus, when the cutting blade 130 has a double structure, the hardness of the steel portion 120 at the tip of the cutting blade 130 and the impact resistance and toughness of the soft iron portion 110 on the base side of the cutting blade 130 are exhibited. .

  Next, the depth of the cut 131 will be described. The notch 131 is inserted from the steel part 120 to a part of the soft iron part 110. However, if the notch 131 is excessively inserted into the soft iron part and the ratio of the notch 131 to the width of the soft iron part 110 of the base becomes large, the tillage rotary Since the blade 100 is easily broken, it is necessary to adjust the ratio of the cut 131 to the width of the rotary rotary blade 100 for tillage. Therefore, in this configuration example, the notch of the sawtooth cutting blade 130 is provided so that the depth gradually increases from the rotating shaft side to the tip side. The longer cutting edge of the cutting blade 130 is advantageous for cutting rice and lotus roots. However, when the ratio of the cut 131 to the width of the rotary rotary blade 100 increases as described above, the rotary rotary blade 100 is broken. It becomes easy. Therefore, as shown in FIG. 1, in this configuration example, if the thickness of the rotary blade 100 for tillage is relatively thin near the rotation axis and is gradually increased toward the tip, the tip side is more Since there is room for the depth of the cut 131, the cut 131 can be made relatively deep.

  Next, the angle and location where the cut 131 is made with respect to the rotary rotary blade 100 will be described. In this configuration example, as shown in FIG. 1, the notch 131 is provided to be slightly inclined toward the tip side with respect to the tangent to the blade surface of the rotary rotary blade 100, and the cutting edge of the cutting blade 130 has a slightly acute angle. ing. If the angle is too sharp, the cutting edge tends to spill, and the cutting of rice root and lotus root will be cut by the high speed cutting 131 that forms the blade surface of the rotating cutting blade. The tilt angle is slightly inclined to the tip side with respect to the tangent of the blade surface of the rotary rotary blade 100 so that the angle becomes easy.

  FIG. 2 is a view in which the angle of the notch 131 serving as the blade surface of the rotating cutting blade is examined. As shown in FIG. 2 (a), if it is provided with a slight inclination toward the tip side with respect to the tangent to the blade surface of the rotary rotary blade 100, the rice root and the lotus root to be cut like a nata blade It hits at opposite angles, and the cutting power of rice roots and lotus roots increases.

  On the other hand, as shown in FIG. 2 (b), if the blade tip is sharply provided with a large inclination with respect to the tangent to the blade surface of the rotary blade 100 for tillage, it is oblique to the rice root and the lotus root. This means that the cutting force of rice roots and lotus roots will not increase. In order to cut rice roots and lotus roots in this state, it is necessary to sharpen the entire cut 131 like a blade, but even if sharpened, the blades are easy to chip and maintenance of the blade sharpening is always required. End up.

  As shown in FIG. 2 (a), the rotary blade 100 for tillage strikes the rice root and the lotus root at a high speed like a nata blade, and is cut by cutting the rice root and the lotus root with the impact. Moreover, the cutting force of rice roots or astragal roots can be increased by applying them at an angle opposite to those of rice roots or astragal roots.

  Next, the interval between the cutting blades 130 will be described. In the configuration example shown in FIG. 1, the cutting blades 130 are provided so that the interval between the cutting blades 130 becomes narrower from the rotating shaft side to the tip side. The rotary blade for tillage 100 is curved from the rotating shaft side to the tip side, but its curvature gradually becomes gentle. Therefore, if it is provided to be inclined at a predetermined angle with respect to the tangent to the blade surface of the rotary blade 100 for tillage and provided so that the interval is narrowed from the rotating shaft side to the tip side, the ridge line that connects the cutting blades 130 to each other The length 132 can be made relatively long, and an effect is obtained that the cut 131 that rotates at high speed can easily face the rice roots and the lotus roots.

Next, the location where the cutting blade 130 is provided will be described.
In this configuration example, as shown in FIG. 1, the cutting blade 130 is provided on the straight portion 101 when viewed from the upper surface side of the rotary rotary blade 100, and 0 to 2 are provided on the earth raising portion 102 curved inward. A flat blade 140 is provided on the earth raising portion 102.

  As described above, the rotary rotary blade 100 for tillage collides with the rice root and the lotus root at a high speed, and cuts the rice root and the lotus root with the impact, so as shown in FIG. Although it is necessary to apply it at an angle opposite to the rice root or the lotus root, this portion corresponds to the straight portion 101 when viewed from the upper surface side of the rotary blade 100 for tillage. Therefore, it is assumed that the cutting blade 130 is provided around the straight line portion 101. The earth raising portion 102 curved inward has a function of raising the earth, so that it is advantageous to have a large blade area. As will be described later, the area is increased as a flat blade.

  As described above, the flat blade 140 has a shape curved inward to raise the earth. The flat blade 140 enters obliquely deeply into the soil, and when the soil comes out of the soil by rotation, the flat blade 140 removes the soil at the flat blade portion. It is supposed to be scraped up. In this configuration example, the flat blade 140 is also sharpened to some extent, so that the blade has a function of scooping up the soil and cutting the rice root and the lotus root like a blade.

  Since the flat blade 140 serving as the earth raising portion has a function of digging up the soil while cutting in the soil, the cutting blade 130 is not formed on the outer peripheral side of the flat blade 140, and the area is rather kept large. ing. The larger area of the flat blade 140 of the earth raising part 102 has a function of digging up plant residues such as buried rice roots and astragalus roots with the soil and pushing them to the curved side.

  FIG. 3 is a view of the rotary rotary blade 100 viewed from the back. As shown in FIG. 3, the cutting blade 130 is provided around the straight portion 101 of the tillage rotary blade 100, and the cutting blade 130 is not provided in the curved raising portion 102, and the raising is performed. It has become a flat blade for. As described above, the portion for cutting rice root and the lotus root and the raised portion 102 are provided at positions corresponding to the purpose, and the rotary blade 100 for tillage has a functional design.

  Next, the rotation shaft hole 150 is a hole connected to the rotation shaft of the tractor. The rotation shaft hole 150 is inserted into the rotation shaft of the tractor, and both sides are fastened with screws to firmly attach to the rotation shaft of the tractor.

  FIG. 4A is a diagram simply illustrating a state in which a plurality of tilling rotary blades 100 are attached to the rotation shaft 210 of the tractor 200. The rotation shaft 210 of the tillage rotary blade 100 is inserted into the rotation shaft 210 of the tractor 200, and both sides are fastened with screws to be firmly attached.

  When the rotary shaft 210 of the tractor 200 shown in FIG. 4A is rotated at a high speed, the rotary rotary blade 100 enters the soil as shown in FIG. While cutting, you can scoop up the soil at the raised portion.

The structural example of the rotary blade for tillage of this invention concerning Example 2 is shown.
FIG. 5 is a view showing a configuration example of a rotary rotary blade 100a according to the present invention.
As shown in FIG. 5, the rotary rotary blade 100 a includes a soft iron portion 110, a steel portion 120, a cutting blade 130, a flat blade 140, a rotary shaft hole 150, and a precursor blade 160.

  Since the soft iron part 110, the steel part 120, the cutting blade 130, the flat blade 140, and the rotating shaft hole 150 may be the same as those of the first embodiment, description thereof is omitted here.

In the example shown in FIG. 5, the precursor blade 160 is a rectangular flat blade, the base portion is a soft iron portion, and a steel portion having high hardness is attached to the front side corresponding to the blade surface when the rotary blade 100 a rotates. It has a double structure.
The precursor blade 160 is manufactured separately from the soft iron portion 110 which is the base portion of the entire tilling rotary blade 100a, and the precursor blade 160 is placed in front of at least one cutting blade 130 in the tilling rotary blade 100a by welding. It can be manufactured by attaching.
In the example of FIG. 5, in the rotary rotary blade 100 a, only one precursor blade 160 is attached in front of the cutting blade 130 at the top in the rotation direction.

The precursor blade 160 has a blade surface that is higher than the blade surface of the cutting blade 130 immediately after it is attached to the rotary rotary blade 100a.
FIGS. 6A and 6B are diagrams simply showing a state where the rotary blade 100a for tillage is attached to the rotating shaft 210 of the tractor 200 and rotated.

  When the rotary shaft 210 of the tractor 200 is rotated at a high speed, as shown in FIGS. 6A to 6B, when the rotary rotary blade 100a enters the soil, the precursor blade 160 is driven deeply into the ground. Therefore, the root portion can be cut from the root portion of the rice root or the lotus root with the blade surface of the precursor blade 160. The cut root can scrape up the soil with another cutting blade 130 following the precursor blade 160, particularly with the flat blade 140 of the raised portion 102.

  Next, a device for increasing the structural strength of the precursor blade 160 will be described. Since the precursor blade 160 is the first portion of the rotary blade 100a for tillage that rotates at high speed, the precursor blade 160 is driven first into the soil, so that the structure strength is sufficient to prevent the precursor blade 160 from being chipped or falling off. It is necessary to raise it. Therefore, the following measures are taken to improve the structural strength of the precursor blade 160.

  As shown in FIG. 5, the first device is a device having a double structure in which a base portion is a soft iron portion 162 and a hard steel portion 161 is attached to the front side corresponding to the blade surface. If the front side which is a blade surface is the steel part 161 with a large hardness, the malfunction that the precursor blade 160 is missing does not occur. Moreover, since the base is comprised with the soft iron part 162, the toughness as the precursor blade 160 whole is ensured, and it becomes difficult to bend and chip.

  The second device is a device for supporting the rear end of the precursor blade 160 by the cut 131 of the cutting blade 130 as shown in FIG. In other words, the precursor blade 160 is driven into the soil from the front side, but the precursor blade 160 is supported by bringing the rear end side into contact with the cut 131 of the cutting blade 130, and the structural strength is improved.

  While the preferred embodiment of the rotary blade for tillage of the present invention has been illustrated and described above, it will be understood that various modifications can be made without departing from the technical scope of the present invention.

  The present invention can be widely applied as a rotary blade attached to a rotating shaft of a tractor.

The figure which shows the structural example of the rotary blade 100 for tilling concerning this invention. The figure which examined the angle of the notch 131 used as the blade surface of the rotating cutting blade The figure which looked at rotary blade 100 for tillage from the back The figure which shows a mode that the rotary blade 100 for tillage was attached with respect to the rotating shaft 210 of the tractor 200, and the state of tilling in the soil Excerpt from prior art Japanese Patent Laid-Open No. 8-000003

DESCRIPTION OF SYMBOLS 100 Rotary blade for tillage 101 Straight part 102 Earth raising part 110 Soft iron part 120 Steel part 130 Cutting blade 140 Flat blade 150 Rotary shaft hole 160 Precursor blade

Claims (8)

A plurality of rotary blades for digging out plant residues in the ground such as fields, which are attached to the rotating shaft rotating by the power of the tractor in the axial direction,
A double structure in which a steel part having a high hardness is attached to the outer peripheral side corresponding to the blade surface with respect to the soft iron part serving as a base, and a plurality of saw-tooth cutting blades are formed by making incisions from the blade surface side. A rotary blade for cultivation.   The serrated cutting blade has a notch extending from the steel portion on the blade surface side to a part of the soft iron portion so that the tip portion of the cutting blade is the steel portion and the root portion is the soft iron portion. The rotary blade for tillage according to claim 1, which has both the hardness as a blade that enters the ground and the impact resistance that absorbs the impact when colliding with a stone or the like in the ground.   The rotary blade for tillage according to claim 1 or 2, wherein the cut of the sawtooth cutting blade is provided so that the depth thereof increases from the rotary shaft side to the tip side.   The rotary blade for tillage according to any one of claims 1 to 3, wherein the sawtooth-shaped cutting blade is provided such that a distance between the sawtooth cutting blade and the tip end side decreases.   The saw-toothed cutting blade is provided in a straight line portion when viewed from the upper surface side of the blade, and only about 0 to 2 are provided in the raised portion curved inward, and the cutting blade is provided in the raised portion. The rotary blade for tillage according to claim 1, wherein a flat blade portion that is not provided is provided.   It has a double structure in which a precursor blade is provided in front of at least one of the cutting blades, and the precursor blade has a hard steel portion attached to the front side corresponding to the blade surface with respect to the soft iron portion serving as a base. The rotary blade for tillage according to any one of claims 1 to 5.   The tiller rotary blade according to claim 6, wherein a rear end of the precursor blade is supported by a cut of the cutting blade to ensure structural strength against rotation.   A cultivator equipped with the rotary blade for tillage according to claim 1.

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