JP6882768B2 - Tillage claw - Google Patents

Description

The present invention relates to a tilling claw used for tilling work.

As patent documents relating to conventional tillage claws, "cultivation claws" of JP2013-230143A (Patent Document 1) and JP-A-2007-74974 (Patent Document 2) are known.

The "cultivating claw" described in Patent Document 1 refers to the mounting center of the mounting base (1) in the side view when the side surface is a plane whose normal line is the rotating axis (SO) of the rotating claw shaft (S). The horizontal bending start horizontal distance (L) from the passing vertical line segment to the blade edge of the horizontal blade portion bending start portion (F) is the vertical distance from the mounting center of the mounting base (1) to the lowest edge of the tilling claw. The length is approximately the same as that of (C), and is orthogonal to the vertical line segment passing through the mounting center of the mounting base (1) in the side view, and the line passing through the lowermost edge of the blade edge and the bending start portion (F) of the horizontal blade portion. ) Is approximately 90 degrees, and the first curved radius of curvature (r1) of the curved plate that is curved in one direction with respect to the surface of the mounting base in a plan view is the horizontal bending start horizontal distance. The total bending height (H1) from the reference surface, which is considered to be more than half the length of (L) and is curved in one direction with respect to the surface of the mounting base in a plan view, is the first bending radius of curvature (r1). It has approximately the same length, intersects with the bending start portion (F) of the lateral blade portion at approximately 90 degrees, and is on the lateral tip position (O) of the lateral blade edge or at the lateral tip position of the lateral blade edge ( The horizontal blade portion (3) above the horizontal blade tip bending start portion (G) provided above Q) is the horizontal blade portion bending direction and is a plane direction orthogonal to the horizontal blade center line in a plan view. A cultivated claw characterized by forming a curved horizontal blade tip portion (31) with a second curved radius of curvature (r2). ”.

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

Japanese Unexamined Patent Publication No. 2013-230143 JP-A-2007-74974

In order to carry out the tilling work efficiently and in a short time, it is necessary to increase the working speed of a traveling machine such as a tractor equipped with the tilling work machine. However, if the speed is increased, the tillage resistance will increase and the load on the tractor will increase, requiring a large tractor. In addition, as the speed increases, the cultivating soil property or the ability to plow in contaminants tends to deteriorate.

In all of the "cultivating claws" described in Patent Documents 1 and 2, since the bending start line of the horizontal blade portion is inclined or parallel to the mounting base side with respect to the vertical line passing through the mounting center of the mounting base portion, the lateral blade portion surface. The cultivated soil tends to rotate outward, and the cultivated soil is difficult to separate from the lateral blade, which causes an increase in cultivating resistance. Further, in Patent Document 1, since the tip portion of the cross blade curved by the second radius of curvature is formed at the tip portion of the cross blade portion, there is a possibility that the tilling resistance is further increased.

An object of the present invention is to provide a tilling claw which has less tilling resistance and can increase the tilling work speed, and does not deteriorate the soil crushability and the plow-in performance even if the tilling speed is increased.

The tillage claw according to claim 1 of the present invention is a tillage claw in which a base is attached to the axial circumference of a rotating claw shaft in a radial direction and is rotated to cultivate soil.
A mounting base portion that is mounted with the mounting flat portion facing the axis direction of the rotary claw shaft, a vertical blade portion that continuously extends from the mounting base portion in the outer peripheral direction and further curves in the direction opposite to the rotation direction, and the above. A horizontal blade portion that is continuously curved from the vertical blade portion in the direction opposite to the rotation direction and is curved in the axial direction of the rotary claw shaft is integrally formed, and the vertical blade portion and the horizontal blade portion are integrally formed. Is a tilling claw having a blade on the edge side facing the outer peripheral side of rotation.
When the tilling claw is attached to the rotary claw shaft and the intersection of the curved start line, which is the boundary line between the horizontal blade portion and the vertical blade portion, and the edge of the blade portion is arranged so as to be the lowermost end, the rotation The curved start line is tilted 0 to 5 degrees to the opposite side of the rotating claw axis with respect to the perpendicular line passing through the axis of the claw axis.
The straight line passing through the axis of the rotating claw shaft and the center of the mounting base is inclined by 12 to 18 degrees to the opposite side of the rotation direction with respect to the perpendicular line passing through the axis of the rotating claw shaft.
The horizontal dimension from the axis of the rotary claw shaft to the tip of the blade is the intersection of the curved start line, which is the boundary between the horizontal blade and the vertical blade, and the edge of the blade, and the vertical to the axis of the rotary claw shaft. It is about 0.9 to 1 times the dimension in the direction,
The height dimension from the reference surface that curves in one direction with respect to the surface of the mounting base in the plan view to the tip of the horizontal blade is the position of the intersection of the bending start line and the edge of the blade in the side view. The cultivated area is 2.4 to 2.8 times the height to the tip of the blade, and the bending angle of the horizontal blade in a plan view is 55 to 65 degrees. It is a claw.

Further, in the tilling claw of claim 2 of the present invention, the bending radius of the horizontal blade portion is the height from the reference surface which is curved in one direction with respect to the surface of the mounting base portion in a horizontal view to the tip of the horizontal blade portion. It is about 1/2 to 2/3 times the dimension, and the horizontal dimension of the horizontal blade is 0.6 to 0. The horizontal dimension from the center of the rotating claw shaft to the intersection of the bending start line and the edge of the blade. The tilling claw according to claim 1, wherein the size is 7 times larger.

Further, the position of the cultivated claw according to claim 3 of the present invention, which is the maximum turning radius when the cultivated claw is rotated with the cultivated claw attached to the rotating claw shaft, is near the tip position of the blade portion of the horizontal blade portion. The tillage claw according to claim 1 or 2, wherein the angle formed by the tangent line of the rotating outer circle and the edge of the lateral blade portion in the side view is 35 degrees to 45 degrees. is there.

Further, the tillage claw according to the fourth aspect of the present invention is characterized in that the claw width at the bending start line position in the side view is about twice the width of the mounting base portion. The tillage claw according to any one of Item 3.

Since the tilling claw of the present invention has low tilling resistance, it is possible to increase the tilling work speed, and the soil crushability and the plow-in performance are good. Therefore, it is possible to provide a tilling work machine capable of efficiently performing tilling work.

It is a side view (a) and a plan view (b) of the tilling claw which concerns on embodiment of this invention.

The tilling claw according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a side view of the cultivated claw in the axial direction of the rotary claw shaft 1 attached to the rotatable rotary claw shaft 1. The tillage claw is held and attached to a holder 11 provided fixed to the rotary claw shaft 1. The holder 11 of this example has a rectangular hole for inserting a tillage claw facing the outer peripheral direction, and the tillage claw is inserted and a bolt is inserted into a mounting hole 21 penetrating in the axial direction of the rotary claw shaft to fasten the holder 11. .. The rotary claw shaft 1 is provided with a large number of holders 11 radially in the axial direction, and the tilling claws are attached to form a tilling rotor. In the description of this example, the axial view of the rotary claw shaft 1 of the tillage claw will be described as a side surface.

The tilling claw is formed in a plate shape, and is continuously attached to the mounting base portion 2 attached to the holder 11 of the rotary claw shaft 1, the vertical blade portion 3 continuously provided on the mounting base portion 2, and the vertical blade portion 3. The vertical blade portion 3 and the horizontal blade portion 4 are curved in the direction opposite to the rotation direction indicated by the arrow Y shown in FIG. 1 (a) with respect to the mounting base portion 2. Further, the lateral blade portion 4 is provided so as to be curved toward the axial core direction (front side in FIG. 1) of the rotary claw shaft 1.

The vertical blade portion 3 and the horizontal blade portion 4 are continuously provided with the blade portion 5 on the outer peripheral side edge portion, and the blade portion 5 gradually increases in blade width from the vertical blade portion 3 to the horizontal blade portion 4 in the side view. It becomes wider and the maximum width is reached at the tip of the horizontal blade portion 4. Further, since the blade width is wide as described above, the blade edge angle becomes an acute angle, and it is easy to pierce the soil and the tillage resistance can be reduced.

The claw width y1 of the tilling claw at the position of the bending start line 7 which is the boundary between the vertical blade portion 3 and the horizontal blade portion 4 is about twice ± 5 mm as the width y of the mounting base portion 2, and the bending start line 7 The claw width k2 on the peak edge portion 6 side located inside the blade portion 5 at the position has a dimensional relationship of about 2 to 2.5 times the width dimension k1 of the blade portion 5. The thickness is gradually reduced from the mounting base 2 side to the tip of the horizontal blade 4. In this example, the thickness of the mounting base 2 side is about 10 mm, and the thickness of the tip of the horizontal blade 4 is about 6 mm. In this example, the width y of the mounting base 2 is 35 mm.

In FIG. 1A, with the tillage claw attached to the rotary claw shaft 1, the intersection P between the curved start line 7 which is the boundary line between the horizontal blade portion 4 and the vertical blade portion 3 and the edge of the blade portion 5 is the maximum. It is arranged so that it is at the lower end. In this state, the bending start line 7 is provided at an angle of 0 to 5 degrees (α) on the opposite side of the uniaxial center of the rotary claw shaft. Further, the mounting base center line 20 passing through the center of the rotating claw shaft 1 and the center of the mounting base 2 is 12 degrees to 18 degrees (γ) opposite to the direction of rotation with respect to the perpendicular line passing through the center of the rotating claw shaft 1. ) The angle is tilted. Since the bending start line 7 is inclined at an α angle to the side opposite to the uniaxial center of the rotary claw axis, that is, in the direction away from the axial center, the excavated soil placed on the lateral blade portion 4 is oblique due to the rotation of the tillage claw. Since it becomes easier to flow backward and the state of holding it is reduced, the tilling resistance can be reduced. In addition, since the cultivated soil acts to be thrown out at high speed without stagnation, the soil crushability is improved. Further, since the mounting base center line 20 is inclined by γ angle to the side opposite to the rotation direction, the length of the vertical blade portion 3 can be shortened, and the resistance acting on the horizontal blade portion 4 is received to the minimum. , The generation of vibration can be suppressed and a robust tillage claw can be obtained.

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 provided with mounting holes 21 for inserting fixing means such as bolts on the mounting base center line 20 in the same direction as the axial direction of the rotary claw shaft 1. The present invention can be applied to the mounting base 2 not only for the holder type mounting of this example but also for the flange type mounting.

The vertical blade portion 3 is formed continuously from the mounting base portion 2 and is gradually curved in the direction opposite to the rotation direction X with respect to the mounting base portion center line 20 of the mounting base portion 2. The curvature is smoothly formed so that the radius of curvature on the mounting base 2 side is small on both the outer peripheral side and the inner peripheral side of the rotation, and the tip side of the lateral blade portion 4 is large. As a result, impurities and the like are not caught on the tilling claws, and the plow-in performance is improved. Further, the blade portion 5 on the outer peripheral side of the rotation gradually widens from the mounting base 2 side toward the horizontal blade portion 4, and the total width of the vertical blade portion 3 and the horizontal blade portion 4 is the tip of the horizontal blade portion 4. The side is the widest. The vertical dimension h2 from the blade tip 50 to the upper end of the tip of the horizontal blade 4 is the vertical dimension h1 from the intersection P position between the bending start line 7 and the edge of the blade 5 to the blade tip 50 of the blade 5. It is 2.4 to 2.8 times the size of. The unfolded shape of the horizontal blade portion 4 before the curved molding is shown by a two-dot chain line.

The horizontal blade portion 4 is formed smoothly and continuously from the vertical blade portion 3 with the bending start line 7 as a boundary, and is curved toward the front side in FIG. The horizontal dimension L from the axis of the rotary claw shaft 1 to the tip of the horizontal blade portion 4 is 0 of the vertical dimension h from the axial center of the rotary claw shaft 1 to the intersection P of the edge of the blade portion 5 and the bending start line 7. The relational dimension is 9. to 1 times, and the horizontal length dimension L2 of the horizontal blade portion 4 is from the axial center of the rotary claw shaft 1 to the intersection P of the edge of the blade portion 5 and the bending start line 7. The dimensional relationship is 0.6 to 0.7 times the horizontal dimension L1. Further, the bending height W from the reference surface D, which is the back surface of the mounting base 2 shown in FIG. 1 (b), to the tip of the horizontal blade portion 4, is the bending start line 7 and the blade in the side view. The dimension is 2.4 to 2.8 times the vertical dimension h1 from the intersection P position with the edge of the portion 5 to the tip 50 of the blade portion 5 of the blade portion 5, and the blade portion of the tip portion of the horizontal blade portion 4 in the side view. The relationship is about the same as the vertical dimension h2 from the tip 50 to the top. The bending angle θ of the horizontal blade portion 4 in a plan view is 55 degrees to 65 degrees, and the bending radius R is 1/2 to 2 of the height dimension W to the tip of the horizontal blade portion in a plan view. It is about / 3 times, and the horizontal dimension L2 of the horizontal blade portion 4 is 0.6 to 0.7 times the horizontal dimension from the center of the rotary claw shaft 1 to the intersection P. Therefore, a flat surface portion is formed on the tip end side of the horizontal blade portion 4. Since the flat surface portion is formed on the tip side of the horizontal blade portion 4, the soil is well separated, and an appropriate amount of soil placed on the surface of the horizontal blade portion 4 is easily blown away, and due to the synergistic effect with the bending angle. Soil crushability is improved.

The position where the maximum turning radius Ra when the cultivated claw is rotated with the cultivated claw attached to the rotating claw shaft 1 is near the position of the tip 50 of the blade portion of the lateral blade portion 4, and is lateral to the tangent line of the rotating outer circle in the side view. The angle β formed by the edge 40 of the blade portion is 35 degrees to 45 degrees. The tilling claws formed by these relational dimensions reduce the tilling load, the tilling power acts efficiently, and the tilling with less vibration at high speed becomes possible. The maximum turning radius Ra in this example is about 255 mm.

The action of the tillage claw will be described. When the rotary claw shaft 1 to which the tillage claw is attached is rotated, the soil is cut by the edge of the blade portion 5 of the vertical blade portion 3 of the tillage claw and bites into the soil. Then, it is sequentially cut by the blade portion 5 on the side of the horizontal blade portion 4. The lateral side of the soil cut by the vertical blade portion 3 is moved diagonally laterally by the horizontal blade portion 4, and is further thrown and moved by a rotational force in the tangential direction of the horizontal blade portion 4. During this time, since the tilling claw is rotating, the soil of the lateral blade portion 4 is sequentially pushed toward the tip side on the rear side in the rotation direction to move and be blown away. Then, the blown soil is struck against a cover (not shown) covering the upper outer circumference of the rotary claw shaft 1, and the soil is finely crushed. In this way, the soil is crushed into small pieces in a short time in order to efficiently move the soil in the lateral direction by applying an appropriate pressure to the soil.

The blade portion 5 provided on the rotary outer peripheral side edge side of the vertical blade portion 3 and the horizontal blade portion 4 gradually widens from the vertical blade portion 3 to the horizontal blade portion 4, and at the tip portion of the horizontal blade portion 4. Due to the maximum width, the cross-sectional angle of the blade is sharper, and it is possible to bite into the soil with a small amount of power. In addition, since the tip side of the horizontal blade portion 4 has a widened shape, more of the cut soil is caught and scattered. The more soil that is scattered, the higher the probability that it will be crushed into small pieces, and even if the tillage speed is increased, the deterioration of soil crushing performance can be suppressed.

With the tillage claw attached to the rotary claw shaft 1, the intersection P between the curved start line 7 which is the boundary line between the horizontal blade portion 4 and the vertical blade portion 3 and the edge of the blade portion 5 is arranged so as to be the lowermost end. When, the mounting base center line 20 passing through the axial center of the rotating claw shaft 1 and the center of the mounting base 2 is 12 to 18 degree angle opposite to the direction of rotation with respect to the perpendicular line passing through the axial center of the rotating claw shaft 1. (Γ) It is tilted. As a result, the length of the vertical blade portion 3 is set short, the bending moment due to the load acting on the horizontal blade portion 4 is reduced, and the load generated on the vertical blade portion 3 in high-speed work is reduced.

Further, the height dimension W from the reference surface D to the tip of the horizontal blade in the plan view is from the intersection P position between the bending start line 7 and the edge of the blade 5 in the side view to the tip 50 of the blade 5. The height dimension h1 is 2.4 to 2.8 times, the bending angle θ is 55 degrees to 65 degrees, and the bending radius R is the height from the reference plane D to the tip of the cross blade. It is about 1/2 to 2/3 times the dimension W, and a flat surface portion is formed at the tip portion. Since the flat surface portion is formed, the soil placed on the surface of the lateral blade portion 4 is guided and easily blown away, and the soil crushability is improved by the synergistic effect with the bending angle. The bending angle θ is formed at a 55-degree angle to a 65-degree angle, and if the bending angle θ is small, the cultivated soil placed on the horizontal blade portion 4 escapes and is difficult to scatter or move, so that the soil crushing performance deteriorates. .. Further, when the bending angle θ becomes large, the tillage soil is easily held, so that the tillage power increases.

The blade portion 5 provided on the rotation outer peripheral side edge side of the vertical blade portion 3 and the horizontal blade portion 4 is gradually curved in the direction opposite to the rotation direction X with respect to the mounting base center line 20 of the mounting base 2, and the curvature is curved. Both the outer peripheral side and the inner peripheral side of the rotation are smoothly formed so that the radius of curvature on the mounting base 2 side is small and the tip side of the lateral blade portion 4 is large. As a result, the rotation of the rotary claw shaft 1 causes the impurities contained in the cultivated soil to move into the soil without being caught by the edge of the blade portion and to be easily embedded in the soil, thereby improving the plow-in performance.

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

1 Rotating claw shaft 2 Mounting base 20 Mounting base center line 3 Vertical blade 4 Horizontal blade 5 Blade 50 Blade tip 6 Peak edge 7 Curved start line

Claims (4)

It is a tilling claw that cultivates the soil by attaching the base to the circumference of the rotating claw shaft in the radial direction and rotating it.
A mounting base portion that is mounted with the mounting flat portion facing the axis direction of the rotary claw shaft, a vertical blade portion that continuously extends from the mounting base portion in the outer peripheral direction and further curves in the direction opposite to the rotation direction, and the above. A horizontal blade portion that is continuously curved from the vertical blade portion in the direction opposite to the rotation direction and is curved in the axial direction of the rotary claw shaft is integrally formed, and the vertical blade portion and the horizontal blade portion are integrally formed. Is a tilling claw having a blade on the edge side facing the outer peripheral side of rotation.
When the tilling claw is attached to the rotary claw shaft and the intersection of the curved start line, which is the boundary line between the horizontal blade portion and the vertical blade portion, and the edge of the blade portion is arranged so as to be the lowermost end, the rotation The curved start line is tilted 0 to 5 degrees to the opposite side of the rotating claw axis with respect to the perpendicular line passing through the axis of the claw axis.
The straight line passing through the axis of the rotating claw shaft and the center of the mounting base is inclined by 12 to 18 degrees to the opposite side of the rotation direction with respect to the perpendicular line passing through the axis of the rotating claw shaft.
The horizontal dimension from the axis of the rotary claw shaft to the tip of the blade is the intersection of the curved start line, which is the boundary between the horizontal blade and the vertical blade, and the edge of the blade, and the vertical to the axis of the rotary claw shaft. It is about 0.9 to 1 times the dimension in the direction,
The height dimension from the reference surface that curves in one direction with respect to the surface of the mounting base in the plan view to the tip of the horizontal blade is the position of the intersection of the bending start line and the edge of the blade in the side view. The cultivated area is 2.4 to 2.8 times the height to the tip of the blade, and the bending angle of the horizontal blade in a plan view is 55 to 65 degrees. nail. The bending radius of the horizontal blade portion is about 1/2 to 2/3 times the height dimension from the reference surface curved to one side with respect to the surface of the mounting base portion in a horizontal view to the tip of the horizontal blade portion. The claim is characterized in that the horizontal dimension of the horizontal blade portion is 0.6 to 0.7 times the horizontal dimension from the center of the rotary claw shaft to the intersection of the bending start line and the edge of the blade portion. The cultivated claw according to 1. The position where the maximum turning radius when the tillage claw is rotated with the tillage claw attached to the rotary claw shaft is near the tip position of the blade portion of the lateral blade portion, and the tangent line of the rotation outer circle and the lateral blade portion in the side view. The tilling claw according to any one of claims 1 or 2, wherein the angle formed with the edge is 35 degrees to 45 degrees. The tillage claw according to any one of claims 1 to 3, wherein the claw width at the bending start line position in a side view is about twice the width of the mounting base portion.

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