JP6882761B2 - 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 2, since the tip portion of the cross blade curved with 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 cultivated claw according to claim 1 of the present invention has a mounting base portion to be mounted with the mounting plane portion facing the axis direction of the rotary claw shaft, and continuously extends in the outer peripheral direction from the mounting base portion, and further extends in the direction opposite to the rotation direction. The vertical blade portion that curves toward the surface and the horizontal blade portion that continuously curves from the vertical blade portion in the direction opposite to the rotation direction and is curved toward the axis of the rotary claw shaft are integrated. The vertical blade portion and the horizontal blade portion are formed in a tilling claw having a blade portion on the edge side facing the outer peripheral side of rotation.
When the side view of the rotary claw shaft in the axial direction is the side surface, the blade width gradually increases from the vertical blade side to the horizontal blade side view, and the maximum width at the tip of the horizontal blade portion. Therefore, the widths of the vertical blade portion and the horizontal blade portion on the rotation inner peripheral side from the blade portion on the ridge edge side are formed to be substantially the same width.
The curved start line, which is the boundary line between the horizontal blade portion and the vertical blade portion, is tilted 10 to 15 degrees to the opposite side of the mounting base portion with respect to the mounting base center line passing through the axis of the rotary claw shaft.
The width dimension of the blade portion with respect to the width on the peak edge side in the bending start line direction at the bending start line position is 0.7 to 0.9 times.
The height from the reference surface that curves in one direction with respect to the surface of the mounting base in a plan view to the tip of the lateral blade is from the center line of the mounting base to the bending start line position of the edge of the blade in a side view. It is substantially the same as the horizontal dimension of, and is 2.5 to 2.8 times the vertical dimension between the tip of the blade edge and the bending start line position of the blade edge, and the bending inner radius. 1.7 times to 1.9 times the dimension der is, the lateral cutting portion is bent at 55 degree angle to 65 degree angle to the bending angle in a boundary the bending start line from the longitudinal edge portion, said lateral edge It is a tilling claw characterized in that a flat portion is formed on the tip side of the portion .

Further, in the cultivated claw of claim 2 of the present invention, when the center line of the mounting base passing through the shaft core of the rotating claw shaft in the side view is a vertical line, the bending of the edge of the blade portion starts from the shaft core of the rotating claw shaft. The first aspect of claim 1, wherein the dimension in the vertical line direction to the line position is 2.5 to 2.7 times the dimension in the horizontal direction from the vertical line to the bending start line position. It is a tillage claw.

Further, the cultivated claw according to claim 3 of the present invention is a method of a line passing through the outermost peripheral end of rotation when the cultivated claw is rotated around the axis of the rotating claw shaft to which the cultivated claw is attached and the axis of the rotating claw shaft. The tillage claw according to claim 1 or 2, wherein the maximum projected rotation width of the horizontal blade portion in the linear direction is 0.25 to 0.3 times the outermost peripheral radius of rotation. is there.

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 in a state of being 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 explanation of this example, the axial view of the rotating claw shaft 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 axis 1a direction (front side in FIG. 1) of the rotary claw shaft.

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 widths of the vertical blade portion 3 and the horizontal blade portion 4 on the peak edge portion 6 side located inside the blade portion 5 are formed to be substantially the same width from the mounting base portion 2 side to the tip portion of the horizontal blade portion 4, and have a thickness. Is gradually reduced in thickness 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.

FIG. 1A is arranged so that the mounting base center line 20 passing through the shaft core 1a of the rotary claw shaft and the center of the mounting base 2 is perpendicular to each other. In this state, the position of the intersection P between the curved start line 7 which is the boundary between the vertical blade portion 3 and the horizontal blade portion 4 and the blade portion edge 51 of the blade portion 5 is located at the lowermost end portion. Further, the bending start line 7 is inclined to the side opposite to the mounting base 2 (left side in FIG. 1) with respect to the mounting base center line 20. In this example, the angle is 12 degrees, and an inclination of 10 to 15 degrees is desirable. Since the curved start line 7 is inclined to the opposite side to the mounting base 2, the excavated soil placed on the lateral blade portion 4 is likely to flow diagonally backward due to the rotation of the tilling claws, and the holding state is reduced. The 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.

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 center 1a of the rotary claw shaft. 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 Y 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 width k1 dimension of the blade portion with respect to the width k2 on the peak edge portion side at the position of the bending start line 7 of the horizontal blade portion 4 is 0.7 to 0.9 times. 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 B from the center line 20 of the mounting base to the intersection position P of the edge 51 of the blade and the bending start line 7 and the reference surface D which is the back surface side surface of the mounting base 2 shown in FIG. 1 (b). The bending height H from to to the tip of the horizontal blade 4 is substantially the same, and 2.5 of the dimension X in the vertical direction from the tip of the edge 51 of the blade to the bending start line 7 of the edge 51 of the blade. It is desirable that the dimensions are double to 2.8 times, and the difference in length between them is within 10 mm at the maximum. The bending height H is 1.7 to 1.9 times the bending inner radius r1. Therefore, a flat surface portion is formed on the tip end side of the horizontal blade portion 4. The bending angle θ is preferably 55 degrees to 65 degrees. Since the flat surface portion is formed on the tip side of the horizontal blade portion 4, the soil is well separated, the soil placed on the surface of the horizontal blade portion 4 is easily blown away, and the soil is crushable due to the synergistic effect with the bending angle. Is improved.

The rotation outermost outer peripheral end portion 50 located at the outermost end when the rotary claw shaft 1 is rotated with the tillage claw attached is located at a substantially intermediate portion of the blade end edge 51 of the horizontal blade portion 4. The line connecting the outermost peripheral end portion 50 of the rotation and the shaft core 1a of the rotary claw shaft, that is, the radius of the outer circumference of rotation Ra is the maximum radius of gyration. The maximum projected rotation width ra of the lateral blade portion 4 in the normal direction at the outermost peripheral end portion 50 of rotation is formed to be 0.25 to 0.3 times the radius of outer circumference of rotation Ra. Further, when the mounting base center line 20 is a vertical line, the dimension A in the vertical line direction from the axis 1a of the rotary claw shaft to the bending start line 7 position P of the blade end edge 51 is from the vertical line to the bending start line. It is formed so as to have a dimension of 2.5 to 2.7 times the horizontal dimension B up to the 7 position P. The tilling claws formed by these relational dimensions reduce the tilling load and efficiently act on the tilling power to enable high-speed tilling.

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 blade end edge 51 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 hit against a cover (not shown) covering the upper outer circumference of the rotary claw shaft 1, and the soil is crushed and 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.

The horizontal dimension B from the mounting base center line 20 to the intersection position P of the blade end edge 51 and the bending start line 7 and the bending height H to the tip of the horizontal blade 4 are provided substantially the same, that is, , The ratio of the lengths of the vertical blade portion 3 and the horizontal blade portion 4 is provided to be substantially the same. 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 bending height H has a dimension of 1.7 to 1.9 times the bending inner radius r1, 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 Y 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 Rotating outermost peripheral edge 51 Blade edge 6 Peak edge 7 Curved start line

Claims (3)

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 side view of the rotary claw shaft in the axial direction is the side surface, the blade width gradually widens from the vertical blade side to the horizontal blade side view, and the maximum width at the tip of the horizontal blade portion. Therefore, the widths of the vertical blade portion and the horizontal blade portion on the rotation inner peripheral side from the blade portion on the ridge edge side are formed to be substantially the same width.
The curved start line, which is the boundary line between the horizontal blade portion and the vertical blade portion, is inclined 10 to 15 degrees to the opposite side of the mounting base portion with respect to the mounting base center line passing through the axis of the rotary claw shaft.
The width dimension of the blade portion with respect to the width on the peak edge side in the bending start line direction at the bending start line position is 0.7 to 0.9 times.
The height from the reference surface that curves in one direction with respect to the surface of the mounting base in a plan view to the tip of the horizontal blade is from the center line of the mounting base to the position of the bending start line of the edge of the blade in the side view. It is substantially the same as the horizontal dimension of, and is 2.5 to 2.8 times the vertical dimension between the tip of the blade edge and the bending start line position of the blade edge, and the bending inner radius. 1.7 times to 1.9 times the dimension der is, the lateral cutting portion is bent at 55 degree angle to 65 degree angle to the bending angle in a boundary the bending start line from the longitudinal edge portion, said lateral edge A tilling claw characterized in that a flat part is formed on the tip side of the part. When the center line of the mounting base passing through the axis of the rotating claw shaft in the side view is a vertical line, the dimension in the vertical line direction from the axis of the rotating claw shaft to the position of the bending start line of the edge of the blade is the vertical line. The tilling claw according to claim 1, wherein the dimension is 2.5 to 2.7 times the horizontal dimension from the line to the position of the bending start line. The maximum projected rotation width of the lateral blade portion in the normal direction of the outermost peripheral end of rotation and the line passing through the axis of the rotating claw shaft when rotated around the axis of the rotating claw shaft to which the tillage claw is attached is The tilling claw according to any one of claims 1 or 2, characterized in that the radius is 0.25 to 0.3 times the outermost peripheral radius of rotation.

Images