JP2018130050A - Tilling tine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the crushability of a cultivated claw, improve the amount of the cultivated claw to carry around the soil, enable high-speed work, and reduce overlapping work at the same place. SOLUTION: This is a tilling claw 1 for rotating and cultivating soil, and has a flat plate-shaped vertical blade portion 3 extending from a base portion 2 and a horizontal blade portion 4 extending from the vertical blade portion 3 by being curved and bent to one side. It has an orthogonal blade portion 5 formed of a flat surface extending from the horizontal blade portion 4 to one side, and is curved from the vertical blade portion 3 to the horizontal blade portion 4 in the direction opposite to the rotation direction, and the vertical blade portion 3 is formed. It has a blade portion on the front side in the rotation direction from the horizontal blade portion 4 to the orthogonal blade portion 5, and the bending start line p1 of the vertical blade portion 3 and the horizontal blade portion 4 and the flat surface portion 5c of the orthogonal blade portion 5 are substantially parallel to each other. , The cultivated claw is inclined at an angle of 12 to 22 degrees toward the rear side in the rotation direction with respect to the straight line passing through the center of the base 2 orthogonal to the rotation axis of the cultivated claw axis o1. [Selection diagram] Fig. 1

Description

  The present invention relates to a tilling nail. Specifically, the present invention relates to a tilling claw that is used by being attached to a shaving machine.

  As conventional techniques related to tilling claws, for example, Japanese Patent Application Laid-Open No. 2006-109787 (Patent Document 1), Japanese Patent Application Laid-Open No. 2007-74974 (Patent Document 2), Japanese Patent Application Laid-Open No. 2012-80901 (Patent Document 3), and the like. Japanese Unexamined Patent Application Publication No. 2006-116471 (Patent Document 4) is known. The “cultivation claw” described in Patent Document 1 is a “cultivation claw in which a mounting base 1, a vertical blade portion 2 made of a flat plate, and a horizontal blade portion 243 made of a curved plate are integrally formed. When a plane whose normal is the rotation axis of the claw axis S is defined as a side surface, a curve starting horizontal distance L from a vertical line passing through the center of the mounting base 1 to the blade edge of the curve starting portion F in a side view is a curvature radius. In the side edge shape from the side edge 24 to the lateral tip position Q of the side blade edge 24, which is smaller than the minimum radius of curvature r1 which is the minimum value of r, from the rotation axis So of the rotary claw shaft S to the lower edge of the edge. The blade edge distance R is continuously changed so as to be the maximum blade edge distance R2 at the midway position of the horizontal blade portion 3. "

  The “cultivation claw” described in Patent Document 2 is “the cultivation claw 1 has a vertical blade portion 10 and a horizontal blade portion 20 that continuously extend from the mounting base 3 attached to the cultivation claw shaft 60. To the horizontal blade portion 20 and curved in the direction opposite to the rotation direction, and the horizontal blade portion 20 is curved to one side, a position R2 that is the maximum rotation radius Rm of the tilling claw 1 and a position that is the maximum cutting width H1. A straight line extending from the position R2 having the maximum rotation radius Rm to the tip surface 22 of the side blade portion 20 between the position R2 having the maximum rotation radius Rm and the position L1 having the maximum cutting width H1. The portion 25 is provided, and the blade tip entry angle formed with the cultivated soil surface at the position R2 having the maximum turning radius Rm is in the range of 50 ° to 55 °.

  The “cultivation claw” described in Patent Document 3 is “the cultivation claw 1 has a vertical blade portion 10 and a horizontal blade portion 20 that continuously extend from the mounting base 3 attached to the cultivation claw shaft 60. To the horizontal blade portion 20 and bent in the direction opposite to the rotation direction, and the horizontal blade portion 20 is bent to one side with respect to the vertical blade portion 10. The vertical blade portion 10 is inclined to one side with respect to the mounting base 3. The bending start portion 11 of the vertical blade portion 10 is attached to the tilling claw shaft 60 and the nail length in a side view in the direction of the nail axis from the line segment passing through the center of the tilling claw shaft and the center of the mounting base 3 to the claw tip. When the length of the claw is L, the claw full length L is located in the vicinity of ¼ of the attachment base portion side, and the bending start portion 23 of the side blade portion 20 is closer to the tip side than half of the claw full length L. The cross-sectional shape of the distal end portion of the horizontal blade portion 20 is on the same direction side as the bending direction of the horizontal blade portion 20 that is bent to one side. Jo to be formed by curved. There is provided a ".

  The “cultivation claw” described in Patent Document 4 is a “cultivation claw that is attached to the periphery of the claw shaft in the radial direction and cultivates the soil by being rotated. A straight blade portion made of a flat plate extending from the base portion, a horizontal blade portion made of a flat surface extending by being inclined or curved to one side from the straight blade portion, and a flat surface extending to the one side from the horizontal blade portion. The blade is curved in the direction opposite to the rotation direction from the straight blade portion to the horizontal blade portion, and the blade portion is disposed on the front side in the rotation direction from the straight blade portion to the horizontal blade portion and the orthogonal blade portion. The orthogonal blade portion plane has a tilling claw that is inclined from the front side toward the rear side toward the rotation center side with respect to the rotation direction.

JP 2006-109787 A JP 2007-74974 A JP 2012-80901 A JP 2006-116471 A

Each of the “cultivation claws” described in Patent Documents 1, 2, and 3 “curves in the direction opposite to the rotation direction from the vertical blade portion 10 to the horizontal blade portion 20, and the horizontal blade portion 20 curves to one side. Or the tip portion is, for example, “curved from the vertical blade portion 10 to the horizontal blade portion 20 in the direction opposite to the rotation direction, and the horizontal blade portion 20 is bent to one side with respect to the vertical blade portion 10”. Curved relative to the base. However, at the time of scraping work, the crushed nature was limited, and the amount by which the tilling nail moved the soil was limited.
Therefore, the conventional shaving machine using the tilling nail has a problem that it is necessary to repeatedly perform the overlapping work many times in the same field and to work at a low speed. In addition, the “cultivation claw” described in Patent Document 4 has an orthogonal blade portion made of a flat surface extending from the side blade portion to one side, and improves the crushed property and improves the amount of the cultivation claw that carries the soil. It is possible to work quickly. However, further improvement in performance is required.

  An object of the present invention is to improve the soil crushing property of the tilling nail, improve the amount of the tilling nail carrying around the soil, enable high-speed work, and reduce duplicate work at the same location. is there.

In order to solve the above-mentioned problems, the tilling claw of claim 1 of the present invention is a tilling claw that cultivates the soil by being attached to the axis of the tilling claw shaft in the radial direction and rotated. ,
A vertical blade portion comprising a flat plate extending from the mounting base;
A flat horizontal blade portion that is bent and extended to one side from the vertical blade portion; and
An orthogonal blade portion formed of a plane parallel to the tilling claw axis extending from the side blade portion to one side;
While being curved in the direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion,
Having a blade portion on the front side in the rotational direction from the vertical blade portion to the horizontal blade portion and the orthogonal blade portion;
The fold line of the vertical blade part and the horizontal blade part and the fold line of the horizontal blade part and the orthogonal blade part are substantially parallel,
The fold line is inclined at a 12 to 22 degree angle toward the rear side in the rotational direction with respect to a straight line passing through the axis of the tilling claw shaft and the center of the mounting base,
The dimension from the bending start line of the horizontal blade portion to the center of the orthogonal blade portion is such that when a straight line passing through the axis of the tillage claw shaft and the center of the mounting base is a vertical line, the bending of the horizontal blade portion from the vertical line is performed. The relationship is about 1.5 times the horizontal dimension to the intersection of the start line and the edge of the blade,
The dimension in the axial direction of the tilling claw shaft from one side surface of the mounting base to the tip of the orthogonal blade is horizontal from the vertical line to the intersection of the bending start line of the horizontal blade and the edge of the blade. A tilling claw characterized by having a relationship of about 2.8 times the size and a size of about 1.7 times the radius of curvature of the curved portion of the side blade portion.

  Further, the tilling claw of claim 2 of the present invention is configured so that when a straight line passing through the axis of the tilling claw shaft and the center of the mounting base is a vertical line, it extends straight from the tip of the edge of the blade portion of the straight blade portion. The height to the upper end of the blade is about 2.3 times the width of the mounting base, and the height from the lower end of the edge of the blade to the tip of the edge of the blade is 2. The tilling nail according to claim 1, wherein the height is from 1 / 2.5 to 1 / 3.5 of a height dimension from the lower end of the edge of the blade portion to the upper end of the direct blade portion.

  Moreover, the tilling nail of claim 3 of the present invention is characterized in that the axial direction dimension of the tilling nail shaft from one side surface of the mounting base to the tip of the orthogonal blade portion is 95 mm or less. A tilling nail according to any one of claims 1 to 2.

  According to the present invention, it is possible to improve the crushability of the tilling nail, improve the amount that the tilling nail carries around the soil, increase the work speed, and reduce duplicate work at the same location. And

(A) is a side view of the use state attached to the scraper of the Example which concerns on embodiment of this invention, (b) is a top view.

  An embodiment of the present invention will be described with reference to FIG. In addition, the cultivation nail | claw of this actual example demonstrates the case of a holder type.

  (A) of FIG. 1 is a side view of the tilling claw as viewed in the axial direction of the tilling claw shaft o1 in a state of being attached to the rotatable tilling claw shaft o1. The tilling claw 1 is held and attached to a holder 11 provided so as to be fixed to the tilling claw shaft o1. The holder 11 of this example has a rectangular hole for inserting the tilling claw 1 facing the outer peripheral direction, and a bolt or the like is inserted into the mounting hole 21 inserted through the tilling claw 1 and penetrating in the axial direction of the tilling claw axis o1. The fastening member is inserted and fastened. The tilling claw shaft o1 is provided with a large number of holders radially in the axial direction, and the tilling claw 1 is attached to constitute a tilling rotor. In the description of this example, the axial center view of the tilling claw axis o1 of the tilling claw 1 will be described as a side surface.

  The tillage claw 1 is formed in a plate shape, and is attached to the holder 11 of the tillage claw shaft o 1, the vertical blade 3 provided continuously to the attachment base 2, and the vertical blade 3 It has a horizontal blade portion 4 provided continuously, and an orthogonal blade portion 5 made of a plane parallel to the tilling claw axis o1 extending from the horizontal blade portion 4 to one side, and the vertical blade portion 3 with respect to the mounting base 2. And the horizontal blade part 4 is formed so as to bend in the direction opposite to the rotation direction indicated by the arrow Y shown in FIG. 1A, and the horizontal blade part 4 is further in the axial direction (see FIG. In FIG. 1, the straight blade portion 5 is an orthogonal blade portion 5 extending from the side blade portion 4 to the front side and having a plane parallel to the tilling claw axis o1 axis. In addition, a blade 6 having a constant width is provided continuously at the outer peripheral edge of the vertical blade 3, the horizontal blade 4, and the straight blade 5. The blade portion 6 is a double-edged blade, but may be a single-edged blade. As the tillage claw 1 rotates, it is cut into the tilled soil from the edge 6a of the vertical blade portion 3, and the edge 6a is curved in an arc shape to the rear side in the rotation direction so as to prevent entanglement such as weeds. Is formed.

  The bending start line p1 of the horizontal blade portion 4 that is the switching position from the vertical blade portion 3 to the horizontal blade portion 4 is a vertical line 20 that is a straight line passing through the axis of the tilling claw shaft o1 and the center of the mounting base 2. When it is inclined to the rear side in the rotation direction with respect to the vertical line 20, that is, toward the direction away from the tilling claw axis o <b> 1, the angle is inclined by 12 degrees to 22 degrees. Further, the bending start line p1 of the horizontal blade portion 4 and the flat portion 5c of the orthogonal blade portion 5 are substantially parallel.

  The dimension L from the bending start line p1 of the horizontal blade portion 4 to the center of the orthogonal blade portion 5 is such that when a straight line passing through the axis 1a of the tilling claw shaft o1 and the center of the mounting base 2 is a vertical line 20, The relationship is about 1.5 times the horizontal dimension P from the vertical line 20 to the intersection of the folding start line p1 of the horizontal blade portion 4 and the edge 6a of the blade portion 6. The dimension is preferably about ± 5 mm of the reference dimension.

The straight blade part 5 has a height dimension h1 from the lower end of the edge 6a of the blade part 6 to the tip 6b of the edge of the blade part 6 from one side D of the mounting base 2 to the tip of the orthogonal blade part 5. It is about 1/2 to 1/3 of the dimension H in the axial direction of the tilling claw shaft o1. The height dimension h1 is about 1 / 2.5 to 1 / 3.5 of the height dimension h2 from the lower end of the edge 6a of the blade part 6 to the upper end of the direct blade part 5.
Further, the height dimension h3 from the tip of the edge 6a of the blade section 6 of the straight blade section 5 to the upper end of the straight blade section 5 is about 2.3 times the width dimension 2L of the mounting base 2 and is allowable. The range is about ± 5 mm. As a result, the cut tillable soil is partially rotated in the direction of rotation by the straight blade portion 5, and a part thereof is thrown and collides with the rear ground leveling plate or the rotor cover, and is finely crushed to improve the crushed soil property. The dimension H in the axial direction of the tilling claw axis o1 from one side surface of the mounting base 2 to the tip of the orthogonal blade part 5 is set to 95 mm or less, thereby reducing tillage resistance and reducing vibration during tillage. be able to.

  The horizontal blade portion 4 has a flat plate shape and is curved with respect to the vertical blade portion 3 toward the axial center direction of the tilling claw shaft o1 (front side in FIG. 1). The curvature radius R of the curved portion of the horizontal blade portion 4 has a relationship of 1 / 1.7 times the dimension H in the axial direction of the tilling claw axis o1 from one side D of the mounting base 2 to the tip of the orthogonal blade portion 5. It is a dimension. The dimension is about ± 5 mm of the standard dimension. The cut cultivated soil is laterally moved and compressed by the curved portion, and is moved to the orthogonal blade portion 5 side.

  The mounting base 2 has a rectangular cross section, and the portion inserted into the holder 11 has a constant thickness and width. The mounting base 2 is not limited to the holder type mounting in this example, and the present invention can also be applied to a flange type mounting.

  The vertical blade portion 3 is formed continuously from the attachment base 2 and is gradually curved in the direction opposite to the rotational direction Y with respect to the vertical line 20 that is the attachment base centerline of the attachment base 2. The curvature is smoothly formed so that the radius of curvature on the mounting base portion 2 side is small on both the rotating outer peripheral side and the inner peripheral side, and the distal end side of the straight blade portion 5 is increased. This eliminates the catching of foreign matter etc. on the tilling nail 1 and improves the scavenging performance. The unfolded shape of the horizontal blade portion 4 and the orthogonal blade portion 5 before curve forming is indicated by a two-dot chain line.

  The upper part of the tip of the orthogonal blade part 5 is formed in a mountain shape composed of a long side 5a and a short side 5b which are long in the vertical direction and short in the horizontal direction, as shown by a two-dot chain line showing the developed state. With this shape, the amount of rotation of the cutting soil is properly maintained to improve the crushed property, and the tillage resistance is reduced to reduce tillage vibration.

  In this example, the maximum rotation radius Ra to the outermost end when the tilling claw shaft o1 is rotated with the tilling claw 1 attached is set to about 190 mm. The outermost end position is a position in the vicinity of the boundary between the straight blade portion 5 and the horizontal blade portion 4. Further, the angle β formed between the normal line of the maximum rotation radius Ra and the flat surface portion 5c of the orthogonal blade portion 5 is set to about 38 degrees to 48 degrees.

  The tilling claw 1 of this example is made of SUP6, and has a predetermined hardness by heat treatment or the like to improve wear resistance. Further, the wear resistance can be further improved by coating the wear resistant material on the blade portion 6 by thermal spraying or the like.

  The operation of the tilling nail 1 will be described. When the tilling claw shaft o1 to which the tilling claw 1 is attached is rotated, the soil is cut by the blade portion 6 of the vertical blade portion 3 of the tilling claw 1 and bites into the soil. And it is cut | disconnected by the blade part 6 by the side blade part 4 side one by one. The lateral side of the soil cut by the vertical blade portion 3 is moved obliquely and laterally by the horizontal blade portion 4 and compressed and crushed, and further moved to the straight blade portion 5 side, and the plane portion of the orthogonal blade portion 5. 5c is inclined to the rear side in the rotation direction by an angle β with respect to the normal line of the maximum rotation radius Ra, and a part thereof is carried around in the rotation direction by the direct blade portion 5 and crushed, and a part thereof is rearward. It is scattered and collides with the cover that covers the upper and rear sides and crushed, and the soil is efficiently and finely crushed in a short time.

  The blade portion 6 provided on the rotation outer peripheral side edge side of the vertical blade portion 3 to the horizontal blade portion 4 and the orthogonal blade portion 5 is gradually opposite to the rotation direction Y with respect to the vertical line 20 which is the attachment base centerline of the attachment base 2. The curved portion is smoothly formed so that the radius of curvature on the mounting base 2 side is small on both the rotating outer peripheral side and the inner peripheral side, and the distal end side of the horizontal blade portion 4 is increased. Thereby, the rotation of the tilling claw shaft o1 makes it easier for impurities contained in the tilled soil to be moved and embedded in the soil without being caught by the edge of the blade portion, and the scavenging performance is improved.

  The present invention can be applied to a tilling claw of a tilling work machine that is mounted behind a traveling machine such as a tractor and performs a tilling work.

DESCRIPTION OF SYMBOLS 1 Tillage claw 2 Mounting base 20 Vertical line 21 Mounting hole 3 Vertical blade part 4 Horizontal blade part 5 Orthogonal blade part 6 Blade part p1 Bending start line

Claims (3)

A mounting claw for cultivating soil by being attached to the axis of the tilling claw shaft in a radial direction and being rotated,
A vertical blade portion comprising a flat plate extending from the mounting base;
A flat horizontal blade portion that is bent and extended to one side from the vertical blade portion; and
An orthogonal blade portion formed of a plane parallel to the tilling claw axis extending from the side blade portion to one side;
While being curved in the direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion,
Having a blade portion on the front side in the rotational direction from the vertical blade portion to the horizontal blade portion and the orthogonal blade portion;
The fold line of the vertical blade part and the horizontal blade part and the fold line of the horizontal blade part and the orthogonal blade part are substantially parallel,
The fold line is inclined at a 12 to 22 degree angle toward the rear side in the rotational direction with respect to a straight line passing through the axis of the tilling claw shaft and the center of the mounting base,
The dimension from the bending start line of the horizontal blade portion to the center of the orthogonal blade portion is such that when a straight line passing through the axis of the tillage claw shaft and the center of the mounting base is a vertical line, the bending of the horizontal blade portion from the vertical line is performed. The relationship is about 1.5 times the horizontal dimension to the intersection of the start line and the edge of the blade,
The dimension in the axial direction of the tilling claw shaft from one side surface of the mounting base to the tip of the orthogonal blade is horizontal from the vertical line to the intersection of the bending start line of the horizontal blade and the edge of the blade. A tilling claw characterized by having a relationship of about 2.8 times the size and a size of about 1.7 times the radius of curvature of the curved portion of the side blade portion.   When a straight line passing through the axis of the tillage claw shaft and the center of the mounting base is a vertical line, the height dimension from the tip of the edge of the blade of the straight blade to the upper end of the straight blade is the mounting base. The height from the lower end of the edge of the blade to the tip of the edge of the blade is from the lower end of the edge of the blade to the upper end of the straight blade. The tilling nail according to claim 1, wherein the tilling nail is 1 / 2.5 to 1 / 3.5 of a height dimension up to.   3. The tillage according to claim 1, wherein the axial dimension of the tillage claw shaft from one side surface of the mounting base to the tip of the orthogonal blade is 95 mm or less. claw.

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