WO2017056591A1 - Tilling tine arrangement structure for tilling machine - Google Patents

Abstract

When two kinds of tilling tines are selectively mounted, the present invention enables tilling performance to be favorably exhibited even when either of the tilling tines is mounted. This tilling tine arrangement structure for a tilling machine is provided with: a rotating shaft; a plurality of flanges disposed at intervals in the axial direction of the rotating shaft; and a mounting part for selectively mounting a plurality of first tilling tines or second tilling tines of a different type than the first tilling tines, wherein, in a state in which the plurality of first tilling tines are mounted on the plurality of flanges, the arrangement direction of the first tilling tines which are adjacent in the axial direction and have the same orientation differs from the arrangement direction of the second tilling tines which are adjacent in the axial direction and have the same orientation.

Description

Arrangement structure of tilling claws in a tiller

The present invention relates to an arrangement structure of tilling claws in a tiller.

Conventionally, the techniques disclosed in Patent Literature 1 and Patent Literature 2 are known as rotary tillers. The rotary tiller disclosed in Patent Literature 1 and Patent Literature 2 includes a rotation shaft that can rotate around an axis, a plurality of brackets provided on the rotation shaft, and a tilling claw attached to each bracket. ing. In this rotary cultivator, as a tilling claw, a claw having excellent soil reversibility is adopted.

Japanese Patent Publication “Japanese Patent Laid-Open No. 9-248002” Japanese Patent Publication “JP 11-46501 A”

Now, besides a nail | claw, the L-type nail | claw excellent in making soil fine is known as a tilling claw. Normally, a rotary tiller has a structure that can be attached with one kind of tillage claw, so it is difficult to attach a claw and an L-shaped claw to the tiller in the same way to exert the same tillage performance. Is the actual situation.
When plowing with a rotary cultivator, a plurality of flanges attached along the rotating shaft are rotated by the rotating shaft, and a field or the like is plowed with a plurality of tilling claws attached to the flange. At the time of tillage, soil or the like adheres to the rotating shaft, flange, tillage claw and the like. Here, when the adhering soil or the like grows and becomes a lump, soil embrace occurs, and a large load is applied to the flange and the rotating shaft.

It is an object of the present invention to provide an arrangement structure of tilling nails in a tiller that can exert the tilling performance satisfactorily when either of the tilling claws is attached when selectively attaching two kinds of tilling claws. And
Another object of the present invention is to provide an arrangement structure of tilling claws in a tiller that can reduce a load even when a lump of soil or the like is formed.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
The arrangement structure of the tilling claws according to one aspect of the present invention includes a plurality of attachment portions for selectively attaching the rotation shaft, the plurality of first tilling claws, and the second tilling claws that are different from the first tilling claws. And a plurality of flanges provided at intervals in the axial direction of the rotary shaft, and an arrangement structure of tilling claws in a tiller, wherein a plurality of first tillages are provided on the plurality of flanges. In the state where the claws are attached, in the state where the first tilling claws are adjacent to each other in the axial direction and in the same direction, and in the state where the plurality of second tilling claws are attached to the plurality of flanges, The arrangement direction of the second tilling claws in the same direction is different.

Further, in the arrangement structure of the tilling claws, an angle with respect to the axial direction of the arrangement direction of the first tilling claws is different from an angle with respect to the axial direction of the arrangement direction of the second tilling claws.
Further, the arrangement structure of the tilling claws has a plurality of attachment portions for selectively attaching the rotation shaft, the plurality of first tilling claws and the second tilling claws different in kind from the first tilling claws, and A plurality of flanges provided at intervals in the axial direction of the rotary shaft, and an arrangement structure of tilling claws in a tiller provided with a plurality of first tilling claws attached to the plurality of flanges In the state where the distance between the first tilling claws attached to the same flange and facing the same direction and the plurality of second tilling claws attached to the plurality of flanges are attached to the same flange and the same The distance between the nail of the 2nd tilling nail which turns to a direction differs.

Further, in the arrangement structure of the tilling claws, the distance between the first tilling claws is smaller than the distance between the second tilling claws.
In addition, the arrangement structure of the tilling claws includes the maximum rotation trajectory of the first tilling claw with the first tilling claw attached and the second tilling claw with the second tilling claw attached. The maximum rotation trajectory approximately matches.

Moreover, as for the arrangement | sequence structure of a tilling nail | claw, the said attaching part is provided on the same periphery centering on the said rotating shaft.
In addition, the arrangement structure of the tilling claws according to one aspect of the present invention includes a rotating shaft, a plurality of flanges provided at intervals in the axial direction of the rotating shaft, and a plurality of tilling claws attachable to the flange. And the plurality of tilling claws are attached to adjacent first flanges and other adjacent flanges. The tilling claws are arranged in the tilling device. In addition, they are attached to the flange so that the second interval between the tilling claws facing each other is different.

Further, in the arrangement structure of the tilling claws, the first interval is one tilling claws which are arbitrary tilling claws attached to one flange among the plurality of flanges, and a flange adjacent to the one flange. It is an interval between two tilling claws that are attached to a certain second flange and that are opposed to the one tilling nail, and the second interval is different from the second tilling nail. The three tilling claws that are the tilling claws attached to the second flange, and any one attached to the three flanges that are different from the one flange and the second flange and that are adjacent to the two flanges. This is the distance between the four tilling claws that are the tilling claws and face the three tilling claws.

Further, the arrangement structure of the tilling claws includes a rotating shaft, a plurality of flanges provided at intervals in the axial direction of the rotating shaft, and a plurality of tilling claws attachable to the flange. The plurality of tilling claws are attached to adjacent flanges and an angle with respect to the axial direction of the first line connecting the opposing tilling claws attached to the adjacent flanges. The second line connecting the tilling claws facing each other is attached to the flange so that the angle with respect to the axial direction is different.

Further, the arrangement structure of the tilling claws is attached to one tilling claws that are arbitrary tilling claws attached to one flange among the plurality of flanges, and two flanges that are adjacent to the one flange. An angle with respect to the axial direction of the first line connecting two tilling claws which are tilling claws and facing the one tilling nail, and the tilling claws different from the two tilling claws, Three tilling claws that are attached to the second flange, and any tilling claws attached to the third flange that is different from the first flange and the second flange and that is adjacent to the second flange. And the angle of the second line connecting the four tilling claws, which are the tilling claws facing the three tilling claws, with respect to the axial direction.

Further, the arrangement structure of the tilling claws is such that the second tilling claws are the tilling claws attached to the second flange and have the smallest circumferential distance from the one tilling claw. The cultivating claw is a cultivating claw attached to the three flanges, and has the smallest circumferential distance from the cultivating claw.
Further, the arrangement structure of the tilling claws includes a rotating shaft, a plurality of flanges provided at intervals in the axial direction of the rotating shaft, and a plurality of tilling claws attachable to the flange. It is an arrangement | sequence structure, Comprising: The tilling nail | claw attached to the same flange among these flanges is astigmatic.

Also, in the arrangement structure of the tilling claws, the plurality of flanges are attached so as to shift in phase in one circumferential direction of the flanges as they go in the axial direction.

The present invention has the following effects.
In the arrangement structure of the tilling claws, the arrangement direction of the first tilling claws adjacent in the axial direction and in the same direction is opposite to the arrangement direction of the second tilling claws adjacent in the axial direction and in the same direction. Yes. Therefore, it can suppress that the tilling performance of a 1st tilling nail and a 2nd tilling nail falls. For example, if the first and second tilling claws of different types are arranged in the same direction, various effects (effects at the time of tilling) due to the difference in kind cannot be suppressed, and vibrations at the time of tilling, etc. It can grow. On the other hand, in this invention, since the arrangement | positioning aspect changes for every tilling nail by changing a row direction according to a kind, a vibration etc. can be suppressed.

Also, the angle with respect to the axial direction of the alignment direction in the first tillage nail and the angle with respect to the axial direction of the alignment direction in the second tillage nail are changed. For example, when the first tillage claw and the second tillage claw are set to the same angle, various effects during tillage due to the difference in type cannot be suppressed, and vibration or the like during tillage may increase. On the other hand, in this invention, since an arrangement | sequence aspect changes for every tilling nail by changing an angle according to a kind, a vibration etc. can be suppressed.

Further, the distance between the claws of the first tilling claw attached to the same flange and facing the same direction is different from the distance between the claws of the second tilling claw attached to the same flange and facing the same direction. . Therefore, it is possible to appropriately perform tillage according to the type. For example, the distance between nail | claws corresponding to the tilling nail | claw excellent in the crushing performance and the cultivation claw excellent in the reversing | reversing performance of soil can be set.

Moreover, the distance between the claws of the first tillage claw is smaller than the distance between the claws of the second tillage claw. With the first tillage nail, the soil or the like can be crushed finely, and with the second tillage nail, the soil can be efficiently reversed.
Further, the maximum rotation trajectory of the first tillage claw and the maximum rotation trajectory of the second tillage claw substantially coincide. Therefore, even if the first tillage claw and the second tillage claw are selectively attached, the distance between the tip of the tillage claw and the cultivator for attaching the tillage claw can be kept constant.

Moreover, the attachment part is provided on the same periphery centering on a rotating shaft. Therefore, both the first tilling claw and the second tilling claw can be selectively and easily attached to the same attachment portion. In other words, the mounting portion for attaching the first tillage claw and the second tillage claw can be shared.
The arrangement structure of the above-mentioned tilling claws is different in the first interval between the tilling claws facing each other in the adjacent flange and the second interval between the tilling claws facing each other in the adjacent flange. By making the first interval different from the second interval, it is possible to suppress the soiling of the soil between the tilling claws during the tilling. For example, the first interval can be made larger than the second interval, or the first interval can be made smaller than the second interval. Therefore, even if soil embracing occurs, it is possible to suppress the simultaneous occurrence of a load due to soil embracing by the difference in the interval.

Also, the interval between one tillage claw attached to one flange and the second tillage claw attached to the second flange is defined as a first interval. The interval between the three tilling claws attached to the second flange and the four tilling claws attached to the three flanges is defined as the second interval. Therefore, it is possible to suppress a load applied to three adjacent flanges (one flange, two flanges, and three flanges).

Also, the angle of the first line connecting the tilling claws facing each other in the adjacent flanges is different from the angle of the second line connecting the tilling claws facing each other in the adjacent flanges. Therefore, by making the angle of the first line different from the angle of the second line, it is possible to suppress the soiling of the tilling nail during tilling. For example, the angle of the first line can be made larger than the angle of the second line, or the first angle can be made smaller than the second angle. It is possible to suppress the simultaneous occurrence of loads due to the difference in angle.

Also, the angle of the first line connecting the first tillage claw attached to one flange and the second tillage claw attached to the second flange, and the third tillage claw attached to the second flange and the third flange attached to the third flange. The angle of the second line connecting the four tilling nails is different. Therefore, it is possible to suppress a load applied to three adjacent flanges (one flange, two flanges, and three flanges).

The second tillage nail is a tilling nail attached to the second flange and has a small circumferential distance relative to the one tillage nail. The fourth tilling nail is a tilling nail attached to the third flange. A nail that has a small circumferential distance relative to the third tillage nail. Therefore, it is possible to suppress the load applied to the first tillage claw, the second tillage claw, the third tillage claw, and the fourth tillage claw at the time of tillage.

Moreover, the tilling nail | claw attached to the same flange among several flanges is astigmatic. Therefore, when it is unfolded and the arrangement of the tilling claws is viewed, the spacing between the tilling claws, the angle connecting the tilling claws, and the like can be varied. Therefore, the load and the like during tilling can be suppressed by the arrangement of the tilling claws.
Further, the plurality of flanges are attached so as to shift in phase in one circumferential direction of the flanges as they go in the axial direction. Therefore, simultaneous hitting with a tilling nail can be prevented.

It is a side view of the rotary cultivator according to the first embodiment. It is sectional drawing of the rotary tiller which concerns on 1st Embodiment which showed a part by the plane and showed a part by the back. It is a rear view at the time of attaching an L-type nail | claw to a rotating shaft. It is a rear view at the time of attaching the nail | claw on the rotating shaft. It is a side view of the left end flange. It is a side view of the 2nd to 8th flange. It is a side view of the flange of the right end. It is a side view of an L type nail. It is a side view of a nail. It is a left view at the time of attaching an L type nail to the left end flange. It is a left view at the time of attaching the nail | claw to the flange of the left end. It is a left view at the time of attaching an L type nail to the 2nd flange from the left end. It is a left view at the time of attaching the nail | claw on the 2nd flange from the left end. It is a left view at the time of attaching an L type nail to the 3rd flange from the left end. It is a left view at the time of attaching the nail | claw on the 3rd flange from the left end. It is a left view at the time of attaching an L type nail | claw to the 4th flange from the left end. It is a left view at the time of attaching the nail | claw on the 4th flange from the left end. It is a left view at the time of attaching an L type nail | claw to the 5th flange from the left end. It is a left view at the time of attaching the nail | claw on the 5th flange from the left end. It is a left view at the time of attaching an L type nail | claw to the 6th flange from the left end. It is a left view at the time of attaching the nail | claw on the 6th flange from the left end. It is a left view at the time of attaching an L type nail | claw to the 7th flange from the left end. It is a left view at the time of attaching the nail | claw on the 7th flange from the left end. It is a left view at the time of attaching an L type nail to the 8th flange from the left end. It is a left view at the time of attaching the nail | claw on the 8th flange from the left end. It is a left view at the time of attaching an L type nail to the right end flange. It is a left side surface when the nails are attached to the right end flange. It is an expanded view at the time of attaching an L-type nail | claw to a flange. It is an expanded view at the time of attaching the nail | claw on the flange. It is the image figure which looked at the L type nail | claw which faces the same direction from the back. It is the image figure which looked at the nail | claw which faced the same direction from the back. It is a side view of the rotary cultivator according to the second embodiment. It is sectional drawing of the rotary tiller which concerns on 2nd Embodiment which showed a part with the plane and showed a part with the back surface. It is an expanded view at the time of attaching the nail | claw on the flange.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the first embodiment will be described with reference to FIGS. 1 to 21B.
1 and 2 show a side drive type tiller 1, that is, a rotary tiller. The rotary cultivator 1 is connected to the rear portion of the tractor 2 through a connecting mechanism such as a three-point link mechanism 3 so as to be movable up and down.

In the embodiment of the present invention, the direction of arrow A1 in FIG. 1 is assumed to be the front, the direction of arrow A2 in FIG. 1 is the rear, the direction of arrow B1 in FIG. Moreover, as shown in FIG. 2, the horizontal direction which is a direction orthogonal to the front and rear of the rotary tiller 1 will be described as the body width direction X1. The direction from the central part of the rotary tiller 1 to the right part or the left part will be described as the outside of the machine body. In other words, the outward direction of the body is the direction away from the rotary tiller 1 in the body width direction X1. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the in-machine direction is the direction of the machine body width direction X1 and approaching the rotary tiller 1.

As shown in FIG. 2, the rotary cultivator 1 includes a machine frame 8. The machine frame 8 includes a gear case 4, support arms 5 </ b> L and 5 </ b> R, a transmission case 6, and a side frame 7.
The gear case 4 is located in the central portion of the rotary tiller 1 in the body width direction X1. The support arm 5L protrudes from the gear case 4 to the left side. The support arm 5R protrudes from the gear case 4 to the right side. The transmission case 6 is attached to the outer end of the support arm 5L (end on the outer side of the body). The side frame 7 is attached to the outer end of the support arm 5R.

At the bottom of the transmission case 6, there is provided a support shaft 9L that is rotatable about a horizontal axis (axis in the machine body width direction X1). A support shaft 9 </ b> R that is rotatable around the horizontal axis is provided at the lower portion of the side frame 7. Between the support shaft 9L and the support shaft 9R, a rotating shaft 10 having an axis in the body width direction X1 is provided. The left end of the rotating shaft 10 is connected to the support shaft 9L. The right end of the rotating shaft 10 is connected to the support shaft 9R.

As shown in FIG. 1, the machine casing 8 includes a connecting bracket 11 and a mast 12 positioned on the right and left. The rear end side of the lower link 13 constituting the three-point link mechanism 3 is connected to the connection bracket 11. The rear end side of the top link 14 constituting the three-point link mechanism 3 is connected to the mast 12.
The gear case 4 is provided with an input shaft 15 and a gear transmission mechanism 18. Power is transmitted to the input shaft 15 through a joint 17 from a PTO shaft 16 such as the tractor 2 that is a towing vehicle. The power transmitted to the input shaft 15 is transmitted to the gear transmission mechanism 18, the transmission shaft 19 provided on the support arm 5L, and the chain transmission mechanism 20 provided on the transmission case 6. The power of the chain transmission mechanism 20 is transmitted to the support shaft 9L. With the power transmitted to the support shaft 9L, the rotating shaft 10 rotates in the direction indicated by the arrow Y1 (rotating direction Y1) in FIG.

2 to 4, the rotating shaft 10 is a shaft member formed in a columnar shape. The rotating shaft 10 is provided with a plurality of flanges F1 to F9 at predetermined intervals. The plurality of flanges F1 to F9 are arranged along the axial direction X2 (machine body width direction X1) of the rotary shaft 10, and are attached to the rotary shaft 10 by welding or the like. In the present embodiment, nine flanges F1 to F9 are attached to the rotating shaft 10.

A plurality of types of tilling claws (L1 to L48, N1 to N32) for tillage can be selectively attached to the flanges F1 to F9. In this embodiment, two types of tilling claws (L1 to L48, N1 to N32) can be selectively attached. The construction of the tilling claws will be described later. The rotary tiller 23 is constituted by the rotary shaft 10, flanges F1 to F9, and tilling claws (L1 to L48, N1 to N32).

The upper part of the rotary tiller 23 is covered with a first cover 24 (see FIG. 2), and the rear of the rotary tiller 23 is covered with a second cover (not shown).
A skid 25 for adjusting the tilling depth is detachably attached to the side frame 7 and the transmission case 6. The position of the skid 25 can be adjusted in the vertical direction. The skid 25 may be attached to one of the side frame 7 or the transmission case 6.

In the rotary cultivator 1, by driving the rotary cultivating unit 23, the cultivating claws enter the soil such as the farm field and cultivate the soil. The tilling claw releases the cultivated soil mass backward and hits the second cover to crush the soil.
FIG. 5 shows the flange F1 at the left end. FIG. 6 shows flanges F2 to F8 other than the left end flange F1 and the right end flange F9. FIG. 7 shows the flange F9 at the right end. As shown in FIGS. 5 to 7, the flanges F1 to F9 are formed in a disk shape by a plate material. A first hole 28 formed by an annular edge is provided in the center of the flanges F1 to F9. The flanges F 1 to F 9 are fixed to the rotary shaft 10 by inserting the rotary shaft 10 into the first hole 28 and welding the edge of the first hole 28 to the rotary shaft 10.

As shown in FIGS. 5 to 7, a plurality of attachment portions 30 for attaching the tilling claws are provided on the outer peripheral side of the flanges F1 to F9. The plurality of mounting portions 30 are provided side by side in the circumferential direction C1 of the flanges F1 to F9. In the present embodiment, six attachment portions 30 are provided in the circumferential direction C1 of the flanges F1 to F9. One tilling claw is attached to one attachment portion 30.
Each mounting portion 30 has a first insertion hole 31 and a second insertion hole 32 that are spaced apart in the circumferential direction C1 of the flanges F1 to F9. The first insertion hole 31 and the second insertion hole 32 are formed through the flanges F1 to F9. Further, the attachment portion 30 (the first insertion hole 31 and the second insertion hole 32) is formed on the same circumference 33 with the axis of the rotation shaft 10 as the center. Consider the angle of the line connecting the center position of each mounting portion 30 (the middle of the arc connecting the center of the first insertion hole 31 and the center of the second insertion hole 32) and the rotary shaft 10 (flanges F1 to F9). In this case, the opening angles of adjacent line segments are alternately 70 ° and 50 °.

As shown in FIG. 2, the left end flange F1 is fixed to the support shaft 9L by a fastener 29 such as a bolt, and the right end flange F9 is fixed to the support shaft 9R by a fastener 29 such as a bolt. Thereby, the rotating shaft 10 is attached to the support shafts 9L and 9R.
As shown in FIGS. 5 and 7, the left end flange F <b> 1 and the right end flange F <b> 9 have attachment holes 34 through which the fasteners 29 are inserted. The fastener 29 is screwed into a screw hole formed in the support shafts 9L and 9R through the attachment hole 34. The left end flange F1 and the right end flange F9 are provided with reinforcing ribs 35 fixed to the rotary shaft 10.

Two different types of tilling claws L1 to L48 and N1 to N32 can be selectively attached to the flanges F1 to F9. In this embodiment, L-shaped claws (first tilling claws) L1 to L48 having excellent soil crushing performance, and nails (second tilling claws) N1 to N32 having excellent soil reversing performance can be selectively attached. It is. That is, when the soil crushability is required, the L-shaped claws L1 to L48 are attached to all the flanges F1 to F9. When soil reversal is required, all the claws N1 to N32 are attached to all the flanges F1 to F9. Note that the L-type nail may be referred to as an L-curve nail. The nail is sometimes called a C curve nail.

As shown in FIGS. 3 and 8, the L-shaped claws L1 to L48 are configured by bending a plate material into an L shape. Each of the L-shaped claws L1 to L48 includes a base portion 46, a vertical plate portion 47, and a horizontal plate portion 48.
The base 46 is a part attached to the flanges F1 to F9. The vertical plate portion 47 extends outward in the radial direction of the flanges F1 to F9 from the base portion 46 in a state where the L-shaped claws L1 to L48 are attached to the flanges F1 to F9. The horizontal plate portion 48 extends from the extending end side of the vertical plate portion 47 in the body width direction X1. The horizontal plate portion 48 is substantially orthogonal to the vertical plate portion 47. Edge portions (edge portions on the rotation direction Y1 side) of the vertical plate portion 47 and the horizontal plate portion 48 are respectively formed with blade portions, and the horizontal plate portion 48 is extended in the extending direction from the vertical plate portion 47. A blade portion is also formed at the outer end portion.

Further, as shown in FIG. 8, a third insertion hole 49 and a fourth insertion hole 50 are provided in the base portion 46 of the L-shaped claws L1 to L48. In order to attach the L-shaped claws L1 to L48 to the flanges F1 to F9, the third insertion hole 49 is made to coincide with the first insertion hole 31 with the base 46 overlapped with the side surfaces of the flanges F1 to F9, and the fourth insertion hole 50 is matched with the second insertion hole 32. As shown in FIG. 3 and the like, the bolt 51 (first fastener) is inserted into the first insertion hole 31 and the third insertion hole 49 in this state, and the bolt 51 is inserted into the second insertion hole 32 and the fourth insertion hole 50. Is inserted. Then, a nut 52 (second fastener) is screwed onto the bolt 51.

As shown in FIGS. 4 and 9, the claws N1 to N32 are formed by bending a plate material in a curved shape. The nail claws N1 to N32 have a base portion 53, a straight blade portion 54, and a bending portion 55.
The base 53 is a part attached to the flanges F1 to F9. The straight blade portion 54 extends outward in the radial direction of the flanges F1 to F9 from the base portion 53 with the claws N1 to N32 attached to the flanges F1 to F9. The curved portion 55 is a portion that extends from the extending end side of the straight blade portion 54 in the body width direction X1. The curved portion 55 is bent in a curved shape from one side surface in the thickness direction of the straight blade portion 54 to the other side surface. Blade portions are respectively formed on the leading sides of the straight blade portion 54 and the curved portion 55 in the rotational direction Y1.

The base 53 of the nails N1 to N32 is provided with a fifth insertion hole 56 and a sixth insertion hole 57. In order to attach the nails N1 to N32 to the flanges F1 to F9, the fifth insertion hole 56 is made to coincide with the first insertion hole 31 in a state where the base 53 is overlapped with the side surfaces of the flanges F1 to F9, and the sixth insertion hole 57 is matched with the second insertion hole 32. As shown in FIG. 4 and the like, the bolt 51 is inserted into the first insertion hole 31 and the fifth insertion hole 56 in this state, and the bolt 51 is inserted into the second insertion hole 32 and the sixth insertion hole 57. Then, the nut 52 is screwed onto the bolt 51.

10 to 18 show side views when the L-shaped claws L1 to L48 are attached to the flanges F1 to F9 and when the claws N1 to N32 are attached.
First, the state where the L-shaped claws L1 to L48 are attached to the flanges F1 to F9 will be described with reference to FIGS.
As shown in FIG. 10A, three L-shaped claws L1 to L3 are attached to the flange F1 with a phase (angle) shifted by 120 ° in the circumferential direction C1 of the flange F1. The L-type claws L1 to L3 attached to the flange F1 are right-side claws in which the horizontal plate portion 48 faces the side frame 7 side.

For convenience of explanation, an L-shaped claw with the horizontal plate portion 48 facing the side frame 7 is referred to as a “right-shaped L-shaped claw”. An L-shaped claw in which the horizontal plate portion 48 faces the transmission case 6 side opposite to the side frame 7 is referred to as a “left-oriented L-shaped claw”.
As shown in FIG. 11A, six L-shaped claws L4 to L9 are attached to the flange F2. That is, L-shaped claws are attached to all of the six attachment portions 30 provided on the flange F2.

L-shaped claws L7 to L9 facing right and L-shaped claws L4 to L6 facing left are alternately attached to the flange F2 in the circumferential direction C1. That is, L-shaped claws having different directions are alternately attached to the flange F2. Further, the L-shaped claws L7 to L9 facing right are attached with a phase shift of 120 ° in the circumferential direction C1 of the flange F2. Left-facing L-shaped claws L4 to L6 are also attached with a phase shift of 120 ° in the circumferential direction C1 of the flange F2.

As shown in FIGS. 12A to 17A, the third to eighth flanges F3 to F8 have the same pattern (the same mounting structure) as the L-shaped claws L4 to L9 attached to the flange F2 described above. L-shaped claws are attached to F3 to F8.
Specifically, as shown in FIG. 12A, right-facing L-shaped claws L13 to L15 and left-facing L-shaped claws L10 to L12 are alternately attached to the flange F3. As shown in FIG. 13A, right-facing L-shaped claws L19 to L21 and left-facing L-shaped claws L16 to L18 are alternately attached to the flange F4. As shown in FIG. 14A, right-facing L-shaped claws L25 to L27 and left-facing L-shaped claws L22 to L24 are alternately attached to the flange F5. As shown in FIG. 15A, right-facing L-shaped claws L31 to L33 and left-facing L-shaped claws L28 to L30 are alternately attached to the flange F6. As shown in FIG. 16A, right-facing L-shaped claws L37 to L39 and left-facing L-shaped claws L34 to L36 are alternately attached to the flange F7. As shown in FIG. 17A, right-facing L-shaped claws L43 to L45 and left-facing L-shaped claws L40 to L42 are alternately attached to the flange F8.

As shown in FIG. 18A, three left-facing L-shaped claws L46 to L48 are attached to the flange F9 with a phase shift of 120 ° in the circumferential direction C1 of the flange F9.
Next, a state where the nails N1 to N32 are attached to the flanges F1 to F9 will be described.
As shown in FIG. 10B, the two hooks N1 and N2 are attached to the flange F1 with a phase shift of 180 ° or more in the circumferential direction C1 of the flange F1. That is, the nail | claws N1 and N2 are attached to the flange F1 asymmetrically. The nails N1 and N2 attached to the flange F1 are rightward nails in which the straight blade portion 54 or the curved portion 55 faces the side frame 7 side.

For convenience of explanation, a claw with the straight blade portion 54 or the curved portion 55 facing the side frame 7 is referred to as a “right claw”. Further, the nails in which the straight blade portion 54 or the curved portion 55 faces the transmission case 6 side opposite to the side frame 7 are referred to as “left nails”.
As shown in FIG. 11B, four hooks N3 to N6 are attached to the flange F2. Six attachment portions 30 are provided on the flange F <b> 2, of which four nails are attached to the four attachment portions 30. In the flange F2, a mounting portion 30 (first insertion hole 31 and second insertion hole 32) used for mounting the nail and a mounting portion 30 (first insertion hole 31) used for mounting the L-shaped nail. The second insertion hole 32) is the same, and the mounting portion for attaching the nail and the L-shaped nail is shared. Moreover, when attaching an L-type nail | claw, all the attaching parts 30 are used, whereas when attaching a nail | claw, a part of attaching part 30 is used.

Of the nails N3 to N6 attached to the flange F2, the direction of the nails adjacent in the axial direction X2 is different. In other words, the right and left nails are alternately attached to the flange F2.
Further, the hooks N3 to N6 are attached to the flange F2 so as to be arranged asymmetrically. That is, when the predetermined nails attached to the flange F2 are virtually rotated by 180 ° about the rotation shaft 10 (axial center), the contours of the predetermined nails overlap the other nails. In order to avoid this, a predetermined arrangement of the nails with respect to the flange F2 is set. For example, when the nail N6 is virtually rotated 180 ° about the rotation axis 10, it does not overlap the nail N5. That is, the arrangement of the nails attached to the flange F2 is non-point symmetric, not point symmetric.

As shown in FIGS. 12B to 17B, the third to eighth flanges F3 to F8 have the same pattern (the same mounting structure) as the hooks N3 to N6 attached to the flange F2 described above. Nail nails F3 to F8 are attached.
As shown in FIG. 12B, rightward nails N9 and N10 and leftward nails N7 and N8 are alternately attached to the flange F3. As shown in FIG. 13B, rightward nails N13 and N14 and leftward nails N11 and N12 are alternately attached to the flange F4. As shown in FIG. 14B, right-sided nails N17 and N18 and left-sided nails N15 and N16 are alternately attached to the flange F5. As shown in FIG. 15B, rightward nails N21 and N22 and leftward nails N19 and N20 are alternately attached to the flange F6. As shown in FIG. 16B, rightward nails N25 and N26 and leftward nails N23 and N24 are alternately attached to the flange F7. As shown in FIG. 17B, the flanges F8 are alternately attached to the right nails N29 and N30 and to the left nails N27 and N28.

As shown in FIG. 18B, two left-facing claws N31 and N32 are attached to the flange F9 with a phase shift of 180 ° or more in the circumferential direction C1 of the flange F1. That is, the nail | claws N31 and N32 are attached to the flange F9 asymmetrically.
As shown in FIGS. 10 to 18, the maximum rotation locus of the L-shaped claws L1 to L48 when the L-shaped claws L1 to L48 are attached to the flanges F1 to F9 is referred to as a “first maximum rotation locus 64”. Further, the maximum rotation locus of the hooks N1 to N32 when the hooks N1 to N32 are attached to the flanges F1 to F9 is referred to as a “second maximum rotation locus 65”. In this case, the first maximum rotation locus 64 and the second maximum rotation locus 65 substantially coincide with each other. Therefore, even when the L-shaped claws L1 to L48 are attached or the nail claws N1 to N32 are attached, the maximum rotation trajectories 64 and 65 of the tilling claws are not changed, so that the rotary tiller 23 and the rotary tiller 23 The gap with the rotary cover (the first cover 24 or the like) covering the cover can be made substantially the same when the claws N1 to N32 are attached to the case where the L-type claws L1 to L48 are attached. .

Next, the position in the circumferential direction C1 of the flanges F1 to F9 with respect to the rotating shaft 10, that is, the position in the circumferential direction C1 of the predetermined mounting portion 30 provided on the flanges F1 to F9 will be described.
As shown in FIG. 10A to FIG. 18A and FIG. 10B to FIG. 18B, when attention is paid to a predetermined mounting portion 30 (a single mounting portion 30) provided on the flanges F1 to F9, the predetermined mounting portion 30 is separated from the flange F1. The position changes clockwise as it goes to the flange F9.

For example, when comparing the attachment portion 307 for attaching the L-type claw L7 in the flange F2 with the attachment portion 301 for attaching the L-type claw L1 in the flange F1, they are shifted by 18 ° in the circumferential direction C1. In other words, when the flange F2 and the flange F1 are compared, the flange F2 is attached to the rotating shaft 10 in the circumferential direction C1 (rotation direction Y1) with respect to the flange F1 and rotated clockwise by 18 °. ing.

Similarly, in the flanges F3 to F9, the positions of the adjacent flanges with respect to the rotating shaft 10 (positions of the predetermined mounting portions 30) are different clockwise.
The flange F3 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F2. The flange F4 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F3. The flange F5 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise relative to the flange F4. The flange F6 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F5. The flange F7 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F6. The flange F8 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F7. The flange F9 is attached to the rotating shaft 10 in a state of being rotated 18 ° clockwise with respect to the flange F8.

FIG. 19 is a development view when the L-shaped claws L1 to L48 are attached to the flanges F1 to F9. The arrangement structure of the L-type nails and the arrangement of the L-type nails will be described with reference to FIG.
FIG. 19 shows an L-shaped claw L1 when the rotary shaft 10 is rotated once (360 ° rotation) in a state where the L-shaped claws L1 to L48 are attached to the flanges F1 to F9, as shown in FIGS. 10A to 18A. FIG. 6 is a diagram showing positions of L48 as a development view. The position of the circle “◯” in the developed view indicates the position of the attachment portion 30. In the description of the arrangement structure and arrangement based on FIG. 19, the direction (alignment) of the arrangement of the L-shaped claws, the distance between the L-shaped claws, and the like are based on the end portion of the attachment portion 30 and the base portion 46 attached to the attachment portion 30 To do.

In the arrangement structure shown in FIG. 19, attention is paid to the arrangement of the axial direction X2 in the L-shaped claws (the L-shaped claws in which the lateral plate portion 48 extends in the same direction) facing the same direction among the plurality of L-shaped claws L1 to L48. Here, the inclinations of a plurality of imaginary lines W1 formed by continuously connecting the base portions 46 of two adjacent L-shaped claws that are L-shaped claws facing the same direction in the axial direction are the same. That is, the inclination (direction) of the line (the imaginary line W1) connecting the plurality of L-shaped claws facing the same direction, that is, the arrangement direction is the same. For example, a virtual line W1a connecting right-facing L-shaped claws L1, L7, L13, L19, L25, L31, L37, and L44 and right-facing L-shaped claws L2, L8, L14, L20, L26, L32, L38, and L45 The connecting virtual line W1b has the same inclination and the same alignment direction.

In other words, among the plurality of L-shaped claws attached to adjacent flanges, two L-shaped claws that face the same direction and have a small phase difference (angle difference) in the circumferential direction C1 in a side view. The alignment direction of the axial direction X2 in the two L-shaped claws, that is, the direction of the vector is the same.
For example, the arrangement of the right-facing L-type claws L1, L7, L13, L19, L25, L31, L37, and L44 is “first claw arrangement 66”, and the right-facing L-type claws L2, L8, L14, L20, L26, L32 , L38, L45 is referred to as “second claw array 67”. When the arrangement direction of the first claw arrangement 66 is represented by a vector (arrow in the figure) and the arrangement direction of the second claw arrangement 67 is represented by a vector (arrow in the figure), the directions of both vectors are the same.

Further, as shown in FIG. 19, the arrangement of the right-facing L-shaped claws L3, L9, L15, L21, L27, L33, and L39 is a third claw arrangement 68. The arrangement of the left-facing L-shaped claws L4, L10, L16, L23, L29, L35, L41, and L47 is a fourth claw arrangement 69. An array of left-facing L-shaped claws L5, L11, L17, L24, L30, L36, L42, and L48 is a fifth claw array 70. The arrangement of the left-facing L-shaped claws L22, L28, L34, L40, and L46 is a sixth claw arrangement 71.

In such a case, the L-shaped nail arrangement direction (alignment direction) in the first nail arrangement 66, the second nail arrangement 67, the third nail arrangement 68, the fourth nail arrangement 69, the fifth nail arrangement 70, and the sixth nail arrangement 71 V1) are all the same. For example, the arrangement direction V1a of the first claw arrangement 66, the arrangement direction V1b of the second claw arrangement 67, the arrangement direction V1c of the third claw arrangement 68, the arrangement direction V1d of the fourth claw arrangement 69, and the arrangement direction of the fifth claw arrangement 70 The alignment direction V1f of V1e and the sixth claw array 71 is the same direction. In the embodiment, all the arrangement directions are the same, but some arrangement directions may be the same.

Also, the L-shaped claws alignment direction V1 (V1a, V1b, V1c, V1d, V1e, V1f) is rightward (the same direction and adjacent L-shaped claws have an angle [vertical axis angle] in the developed view). As it grows, it moves to the right). In other words, paying attention to a predetermined L-shaped nail that is in the same direction and continuously drawing the transition of the rear view of the predetermined L-shaped nail (transition of the rear view of the L-shaped nail), it is as shown in FIG. 21A. . In FIG. 21A, for convenience of explanation, the transition of the L-shaped nail when the angle in the development view is 0 ° to 180 ° is shown by a curve on the left half of the dotted line P1, and the angle in the development view is 180 ° to 360 °. The transition of the L-shaped nail in this case is indicated by a curve on the right half of the dotted line P1. That is, in FIG. 21A, the rear view transition of the L-shaped nail is shown side by side.

As shown in FIG. 21A, the transition of the L-shaped claws along the body width direction X1 (the angle in the developed view is 0 ° to 180 °) increases from the left side of the rotating shaft 10 to the right side. That is, the alignment direction of the L-shaped nails in the rear view is upward.
FIG. 20 is a development view when the claws N1 to N32 are attached to the flanges F1 to F9. The arrangement structure of the nail and the arrangement of the nail will be described with reference to FIG.

20B and 18B, as shown in FIGS. 10B to 18B, when the claw N1 to N32 on the flanges F1 to F9 are attached, the claw N1 when the rotary shaft 10 is rotated once (360 ° rotation). FIG. 6 is a diagram showing the positions of N32 as a development view. The position of the circle “◯” in the developed view indicates the position of the attachment portion 30.
Also in the description of the arrangement structure and arrangement based on FIG. 20, the orientation (arrangement) of the nails and the distance between the nails are based on the end of the attachment portion 30 and the base portion 53 attached to the attachment portion 30. And

As shown in FIG. 20, attention is paid to the alignment of the axial direction X2 of the nails facing the same direction among the plurality of nails N1 to N32. Here, when the adjacent nails facing in the same direction and viewed in the axial direction X2, the arrangement direction of the adjacent nails, that is, the alignment direction is the same. For example, the arrangement direction of the right nails N10, N14, N18, N22, N25, and N29 and the arrangement direction of the right nails N2, N6, N9, N13, N17, and N21 are the same direction.

In other words, among the two nails attached to the adjacent flanges, the two nails that are oriented in the same direction and have a small phase difference (angle difference) in the circumferential direction C1 in a side view. The arrangement direction (vector direction) of the axial center direction X2 in the two nails is the same. For example, the arrangement of the right nails N10, N14, N18, N22, N25, and N29 is “seventh nail arrangement 72”, and the arrangement of right nails N2, N6, N9, N13, N17, and N21 is “ 8th nail arrangement 73 ”. When the arrangement of the seventh claw arrangement 72 is represented by a vector (arrow in the figure) and the arrangement of the eighth claw arrangement 73 is represented by a vector (arrow in the figure), the directions of both vectors are the same.

Here, as shown in FIG. 20, the left-facing nails N3, N7, N11, and N15 are set as a ninth nail array 74. Further, the left nails N4, N8, N12, N16, N19, N23, N27, and N31 are defined as a tenth nail array 75. The left nails N20, N24, N28, and N32 are defined as an eleventh nail array 76.
In such a case, the arrangement direction (arrangement direction V2) of the nails in the seventh nail array 72, the eighth nail array 73, the ninth nail array 74, the tenth nail array 75, and the eleventh nail array 76 is all the same. It is. For example, the arrangement direction V2a of the seventh claw arrangement 72, the arrangement direction V2b of the eighth claw arrangement 73, the arrangement direction V2c of the ninth claw arrangement 74, the arrangement direction V2d of the tenth claw arrangement 75, and the arrangement direction of the eleventh claw arrangement 76 V2e is in the same direction. In the embodiment, all the arrangement directions are the same, but some arrangement directions may be the same.

Also, the nail claw alignment direction V2 (V2a, V2b, V2c, V2d, V2e) is leftward (in the development view, the same direction and the adjacent nail are the angles in the development view [the angle of the vertical axis] ] Will shift to the left as it grows. In other words, paying attention to the predetermined nail in the same direction and continuously drawing the transition of the rear view of the predetermined nail (transition of the rear view of the nail), as shown in FIG. 21B. . In FIG. 21B, for convenience of explanation, the transition of the nail when the angle in the development view is 0 ° to 180 ° is shown by a curve on the left half of the dotted line P1, and the angle in the development view is 180 ° to 360 °. The transition of the nail in the case is indicated by a curve on the right half of the dotted line P1. That is, in FIG. 21A, the transition of the back view of the nail is shown side by side.

As shown in FIG. 21B, the transition of the nail along the machine body width direction X1 (the angle in the developed view is 0 ° to 180 °) is lowering from the left side of the rotating shaft 10 to the right side (upward to the left shoulder). become. That is, the nail claw arrangement direction in the rear view is a downward shoulder.
Now, as shown in the developed views of FIGS. 19 and 20, when the alignment direction V1 of the L-shaped claws is compared with the alignment direction V2 of the egg nail, the alignment direction V1 in the L-shaped claws (first tilling claws). The direction of the vector direction is different from the arrangement direction V2 (vector direction) of the nail (second tilling nail). In other words, as shown in FIG. 21A and FIG. 21B, the transition when the L-shaped nail is viewed from the back is a right shoulder rise, while the transition when the nail is viewed from the back is a right shoulder drop, The direction of the alignment direction V1 for the L-shaped claws and the alignment direction V2 for the nails are different.

Thus, by making the alignment direction V1 in the L-shaped nail and the alignment direction V2 in the egg nail different from each other, it is possible to suppress a decrease in the tillage performance of both the nail that has become the L-shaped nail. Can do. For example, if the nail that has become an L-shaped nail has the same alignment direction, various effects (effects during tillage) due to the difference in type cannot be suppressed, and for example, vibration during tillage may increase. There is. In the present invention, by changing the arrangement direction depending on the type, the arrangement mode is different for each tilling nail, so that vibration and the like can be suppressed.

Further, when the angle of the L-shaped nail alignment direction V1 (acute angle) with respect to the axial direction X2 is compared with the angle of the nail alignment direction V2 (acute angle) with respect to the axial direction X2, The angle of the L-shaped nail alignment direction V1 is different from the angle of the nail nail alignment direction V2. For example, the angle θ1a of the arrangement direction V1a in the first claw arrangement 66 indicating the L-shaped nail arrangement is different from the angle θ2a of the arrangement direction V2a in the seventh claw arrangement 72 indicating the arrangement of the nail.

Here, regarding the angle of the alignment direction of the L-shaped claws, the angle of the alignment direction V1b is “θ1b”, the angle of the alignment direction V1c is “θ1c”, the angle of the alignment direction V1d is “θ1d”, and the angle of the alignment direction V1e is “ The angle of θ1e ”and the alignment direction V1f is“ θ1f ”. Further, regarding the angle of the arrangement direction of the nails, the angle of the alignment direction V2b is “θ2b”, the angle of the alignment direction V2c is “θ2c”, the angle of the alignment direction V2d is “θ2d”, and the angle of the alignment direction V2e is “θ2e” " In this case, the angles [theta] 1b, [theta] 1c, [theta] 1d, [theta] 1e, [theta] 1f of the L-shaped claws are different from the angles [theta] 2b, [theta] 2c, [theta] 2d, [theta] 2e of the nails. Moreover, the angles θ2b, θ2c, θ2d, and θ2e in the nail claw alignment direction are larger than the angles θ1b, θ1c, θ1d, θ1e, and θ1f in the L claw alignment direction. In addition, each angle of each arrangement of the L-shaped claws may be different from each angle of each arrangement of the claws, or a part of the angles may be different.

In this way, by changing the angle θ1 with respect to the axial direction of the alignment direction in the L-shaped nail and the angle θ2 with respect to the axial direction of the alignment direction in the nail, the arrangement mode is different for each tilling nail, so that vibration or the like Can be suppressed.
Further, a pawl distance L ₁ of the L-shaped pawl, when comparing the claw distance L ₂ thy nails, the nail distance L ₁ of the L-shaped pawl, a pawl distance L ₂ Thy nails Is different. Nail distance L ₁ is less than the pawl distance L _2.

The distance L ₁ between the claws of the L-type claws is a distance between two L-type claws facing the same direction when the L-type claws attached to the same flange among the flanges F1 to F9 are developed. In other words, the claw distance L ₁ of the L-shaped nails, focusing on one flange, one of the plurality of L-shaped claw which is attached to the flange, is in the circumferential direction of the distance between the L-shaped claw facing in the same direction . For example, the flange F8, and right L-shaped pawl L44, the distance between the right L-shaped pawl L45 is a nail between the distance L ₁ L-type nails.

The distance between the claws L ₂ between the nails is the distance between _two nails that face the same direction when the nails attached to the same flange among the flanges F1 to F9 are deployed. In other words, the distance L ₂ between the claws of the nails is a circumferential distance between the nails facing in the same direction among a plurality of nails attached to the flange, focusing on one flange. . For example, the flange F8, the right name was nail N29, the distance between the right name was nail N30 is a nail between the distance L ₂ thy nail.

Thus, since the distance L ₁ between the claws of the L-shaped claws and the distance L ₂ between the claws of the nail are different, the cultivation according to the type can be appropriately performed. For example, it is possible to set the distance between the claws corresponding to the L-type claws excellent in soil breaking performance and the nails excellent in soil reversal performance. Nail distance L ₁ of the L-shaped pawl is smaller than the claw distance L ₂ thy claws, the L-type nails can break finely earth or in thee pawl inverts the soil efficiently be able to.

The attachment portion 30 is provided on the same circumference around the rotation shaft 10. Therefore, both the nail | claw used as the L-type nail | claw can be selectively attached to the same attachment part 30 easily. In other words, the mounting portion 30 for attaching the claw that has become the L-shaped claw can be shared.
Next, a second embodiment will be described with reference to FIGS.
22 and 23 show the rotary cultivator 1 that is connected to the rear portion of the tractor 2 through a connecting mechanism such as a three-point link mechanism 3 so as to be movable up and down. The description of the same configuration as that of the first embodiment is omitted.

In the second embodiment, one type of tilling claws N1 to N32 is attached to the flanges F1 to F9. Further, the tilling claws are the nails N1 to N32 having excellent soil reversal performance. All the claws N1 to N32 are attached to all of the flanges F1 to F9. The attachment of the nails N1 to N32 is as shown in FIGS. 10B to 18B.
Of the plurality of flanges F1 to F9, the hooks attached to the same flange are asymmetric with respect to the point. Therefore, in the deployed state, the spacing between the nails in the unfolding direction, the angle connecting the nails, and the like can be changed.

FIG. 24 is a development view when the claws N1 to N32 are attached to the flanges F1 to F9. The arrangement structure of the nail and the arrangement of the nail will be described with reference to FIG.
FIG. 24 shows the nails N1 when the rotary shaft 10 is rotated once (360 ° rotation) in a state where the nails N1 to N32 are attached to the flanges F1 to F9 as shown in FIGS. 10B to 18B. FIG. 6 is a diagram showing the positions of N32 as a development view. The position of the circle “◯” in the developed view indicates the position of the attachment portion 30.

As shown in FIG. 24, attention is paid to the alignment of the axial direction X2 of the nails facing the same direction among the plurality of nails N1 to N32. Here, when the nails facing in the same direction and adjacent to the axial direction X2 are viewed in the axial direction X2, the arrangement direction of the adjacent nails is the same. For example, the arrangement direction of the right nails N10, N14, N18, N22, N25, and N29 and the arrangement direction of the right nails N2, N6, N9, N13, N17, and N21 are the same.

In other words, among the plurality of nails attached to the flange adjacent to the axial direction X2, the nails are oriented in the same direction and have a small phase difference (angle difference) in the circumferential direction C1 in a side view 2 With respect to the two nails, the alignment direction (vector direction) of the axial direction X2 in the two nails is the same. For example, the arrangement of the right nails N10, N14, N18, N22, N25, and N29 is the “seventh nail arrangement 72”, and the arrangement of the right nails N2, N6, N9, N13, N17, and N21 is “ When the arrangement direction of the seventh claw arrangement 72 is represented by a vector (arrow in the figure) and the arrangement direction of the eighth claw arrangement 73 is represented by a vector (arrow in the figure) The direction of the vector is the same.

Here, as shown in FIG. 24, the left-facing nails N3, N7, N11, and N15 are defined as a ninth nail array 74. Further, the left nails N4, N8, N12, N16, N19, N23, N27, and N31 are defined as a tenth nail array 75. The left nails N20, N24, N28, and N32 are defined as an eleventh nail array 76.
In such a case, the arrangement direction (arrangement direction V2) of the nails in the seventh nail array 72, the eighth nail array 73, the ninth nail array 74, the tenth nail array 75, and the eleventh nail array 76 is all the same. It is. For example, the arrangement direction V2a of the seventh claw arrangement 72, the arrangement direction V2b of the eighth claw arrangement 73, the arrangement direction V2c of the ninth claw arrangement 74, the arrangement direction V2d of the tenth claw arrangement 75, and the arrangement direction of the eleventh claw arrangement 76 V2e is in the same direction. In the embodiment, all the arrangement directions are the same, but some arrangement directions may be the same.

The nail claw alignment direction V2 (V2a, V2b, V2c, V2d, V2e) is leftward (in the development view, the nails that are in the same direction and adjacent to the axial direction X2 are angles in the development view). As [Angle of vertical axis] increases, it moves to the left).
Next, in the developed view shown in FIG. 24, attention is paid to two nails facing each other. Here, the distance between the two claws that are attached to the flange adjacent to the axial direction X2 and that face each other is defined as “first distance M1”, and attached to another adjacent flange. The distance between two nail claws that face each other and that are facing each other is defined as “second distance M2”. The intervals indicated by the first interval M1 and the second interval M2 are distances in the expansion direction (the circumferential direction of the flange) when expanded, and in the rotation direction (traveling direction) of the rotary shaft 10 during tillage. It can be said that the distance between the nails. The first interval M1 and the second interval M2 are different.

Hereinafter, the first interval M1 and the second interval M2 will be described in detail.
As shown in FIG. 24, the first gap M1 and the second gap M2 are the three flanges (one flange, two flanges, three flanges) adjacent to each other in the axial direction among the nine flanges F1 to F9. ) Is the distance between the nails attached to. Here, when one flange is “flange F5”, the second flange is “flange F6”, and the third flange is “flange F7”.

In this case, the first interval M1 is set to an arbitrary claw (one tillage claw) attached to the flange F5 (one flange) and a flange F6 adjacent to the flange F5 (one flange). This is the distance between the second nail (two tillage claws) facing the arbitrary nail (one tillage nail) among the claws. For example, when an arbitrary nail (one tilling nail) attached to the flange F5 is “N18”, the second nail is “N20”. Therefore, the first interval M1 is the interval between the nail N18 and the nail N20. The second nail is a circumferential distance (opening angle) from the one nail in a side view among the plurality of nail claws adjacent to the one nail and facing the one nail. ) Is the smallest nail.

In addition, the second gap M2 is a flange that is attached to the flange F6 and has a different orientation from the second hook (second tillage hook) and a flange adjacent to the flange F6. This is the distance between the arbitrary nail (cultivation nail) attached to F7 and the four nail (cultivation nail) facing the third nail. For example, if the second nail is “N20”, the third nail is either N21 or N22, and the fourth nail is one of N24 or N23. Since the condition is that the first interval M1 and the second interval M2 are different, the second interval is the interval between the third nail N22 and the fourth nail N24.

It should be noted that the four nails are the circumferential distance (opening angle) with the three nails in a side view among a plurality of nails that are adjacent to and face the three nails. ) Is the smallest nail.
As described above, by making the first interval M1 and the second interval M2 different, it is possible to suppress the soiling of the nail soil during tillage. For example, the first interval M1 can be made larger than the second interval M2, or the first interval M1 can be made smaller than the second interval M2. Thus, since the distance between the nails is not the same, it is possible to suppress the simultaneous occurrence of a load due to soil embedding even if soil entrapment occurs.

The straight line connecting the two claws that are attached to the flange adjacent to the axial direction X2 and that faces each other is referred to as “first line N1”, and is attached to the other adjacent flange. A straight line that connects the two nails facing each other is referred to as a “second line N2”. The angle θ _N1 with respect to the axial direction of the first line N1 is different from the angle θ _N2 with respect to the axial direction of the second line N2.

Hereinafter, the angle theta _N1 of the first line N1, will be described in detail angle theta _N2 of the second line N2.
As shown in FIG. 24, the angle theta _N2 angle theta _N1 and the second line N2 of the first line N1 is nine flanges of the F1 ~ F9, 3 one flange (one of the flange adjacent to the axial direction, the two This is the angle that connects the nails attached to the flange (3). As described above, one flange is “flange F5”, the second flange is “flange F6”, and the third flange is “flange F7”.

In this case, the first line N1 includes an arbitrary nail (one tillage nail) attached to the flange F5 and a second nail (second tillage nail) attached to the flange F6 adjacent to the flange F5. It is a connecting line. For example, as described above, when one nail attached to the flange F5 is “N18”, the second nail is “N20”. Therefore, the first line N1 is a line connecting the nail N20 that becomes the nail N18, and the angle on the acute angle side of the first line N1 with respect to the axial direction X2 is the angle θ _N1 .

Further, the second line N2 is attached to the flange F6 and to the flange F7 adjacent to the flange F6, and to the third hook nail (third tillage nail) different from the second hook nail (second tillage nail). This is a line connecting the arbitrary nail (cultivation claw) and the fourth nail (cultivation claw) facing the third nail. For example, if the second nail is “N20”, the third nail is either N21 or N22, and the fourth nail is one of N24 or N23. The angle theta _N1 of the first line N1, since the angle theta _N2 transgression of the second line N2 is a different condition, second line N1 includes a third name was nail N22, a fourth name was nail N24 The angle on the acute angle side of the second line N2 with respect to the axial direction X2 is an angle θ _N2 .

Above, since the changing the angle theta _N1 of the first line N1 and the angle theta _N2 of the second line N2, can be suppressed engulfment of thy claws soil during tilling. For example, the angle of the first line can be made larger than the angle of the second line, or the first angle can be made smaller than the second angle. As a result, it is possible to suppress the simultaneous occurrence of a load due to the inclusion of soil.

As mentioned above, although this invention was demonstrated, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Rotating shaft 30 Attachment part 33 Circumference centering on the axial center of a rotating shaft 62 Axial direction of a rotating shaft 64 Maximum rotation locus of a 1st tillage nail 65 Maximum rotation locus of a 2nd tillage nail X2 Axis direction of a rotating shaft V1 between the claw of the first tilling the arrangement direction V2 second tilling claws alignment direction θ1 first arrangement direction in the arrangement direction of the angle θ2 second tilling claws tilling claws of the claw angle L ₁ first tilling claws distance L ₂ second Distance between tilling claws F1 to F9 Flange L1 to L48 First tilling nail (L-shaped nail)
N1 to N32 Second tillage nail, tillage nail
M1 angle with respect to the axial center direction of the first interval M2 second interval N1 angle theta _N2 second line with respect to the axial center direction of the first line N2 second wire theta _N1 first line

Claims (13)

1. A rotation axis;
   The plurality of first tilling claws and the first tilling claws have a plurality of attachment portions for selectively attaching different types of second tilling claws, and are provided at intervals in the axial direction of the rotating shaft. A plurality of flanges formed,
   An arrangement structure of tilling claws in a tiller with
   In a state where a plurality of first tilling claws are attached to the plurality of flanges, a plurality of second tilling claws are attached to the plurality of flanges, and an arrangement direction of the first tilling claws adjacent to each other in the axial direction and in the same direction. The arrangement | sequence structure of the tilling nail in the tiller which is a direction where the arrangement direction in the 2nd tilling nail adjacent to an axial center direction and the same direction is different in a state.
2. The arrangement structure of the tilling claws in the tiller according to claim 1, wherein an angle of the first tilling claw with respect to the axial direction of the arranging direction is different from an angle with respect to the axial direction of the arranging direction of the second tilling claw.
3. A rotation axis;
   The plurality of first tilling claws and the first tilling claws have a plurality of attachment portions for selectively attaching different types of second tilling claws, and are provided at intervals in the axial direction of the rotating shaft. A plurality of flanges formed,
   An arrangement structure of tilling claws in a tiller with
   In a state where a plurality of first tilling claws are attached to the plurality of flanges, a distance between the first tilling claws attached to the same flange and facing the same direction, and a plurality of second tilling claws on the plurality of flanges An arrangement structure of tilling claws in a tiller in which the distance between the claws of the second tilling claws attached to the same flange and facing the same direction is different.
4. The arrangement structure of the tilling claws in the tiller according to claim 3, wherein the distance between the claws of the first tilling claws is smaller than the distance between the claws of the second tilling claws.
5. The maximum rotation trajectory of the first tillage claw with the first tillage claw attached is substantially coincident with the maximum rotation trajectory of the second tillage claw with the second tillage claw attached. Item 5. Arrangement structure of tilling claws in the tiller according to any one of Items 1 to 4.
6. The arrangement structure of the tilling claws in the tiller according to any one of claims 1 to 5, wherein the mounting portion is provided on the same circumference with the rotation axis as a center.
7. A rotation axis;
   A plurality of flanges provided at intervals in the axial direction of the rotary shaft;
   A plurality of tilling claws attachable to the flange;
   An arrangement structure of tilling claws in a tiller with
   The plurality of tilling claws have a flange so that a first interval between mutually facing tilling claws attached to adjacent flanges is different from a second interval between mutually facing tilling claws attached to other adjacent flanges. Arrangement structure of tilling claws in the tiller attached to
8. The first interval is one cultivating claw that is an arbitrary cultivating claw attached to one flange of the plurality of flanges, and a cultivating claw that is attached to a second flange that is a flange adjacent to the one flange. And the distance between the second tilling nail that is the tilling nail facing the one tilling nail,
   The second interval is different from the first tillage nail and the third tilling nail which is a tilling nail different from the second tilling nail and is attached to the second flange. The cultivator according to claim 7, wherein the cultivator is an optional cultivating claw attached to a third flange that is a flange adjacent to the second flange and is spaced from a fourth cultivating claw that faces the third cultivating claw. Arrangement structure of tilling nails in Japan.
9. A rotation axis;
   A plurality of flanges provided at intervals in the axial direction of the rotary shaft;
   A plurality of tilling claws attachable to the flange;
   An arrangement structure of tilling claws in a tiller with
   The plurality of tilling claws include an angle with respect to the axial direction of a first line connecting mutually facing tilling claws attached to adjacent flanges, and a second line connecting mutually facing tilling claws attached to other adjacent flanges. An arrangement structure of tilling claws in a tiller attached to a flange so that an angle with respect to the axial direction of the head differs.
10. One tilling claw that is an arbitrary tilling claw attached to one flange of the plurality of flanges, and a tilling claw attached to a second flange that is a flange adjacent to the one flange. An angle of the first line connecting the two tilling claws that are the tilling claws facing the claws with respect to the axial direction;
    Three tilling claws that are different from the second tilling claws and are attached to the second flange, and a flange that is different from the first flange and the second flange and is adjacent to the second flange An angle with respect to the axial direction of the second line connecting the four tilling claws, which are arbitrary tilling claws attached to the three flanges and facing the three tilling claws,
    The arrangement structure of the tilling claws in the field cultivator according to claim 9, wherein
11. The second tilling claw is a tilling claw attached to the second flange and has the smallest circumferential distance from the one tilling claw, and the fourth tilling claw is provided on the three flanges. The arrangement structure of the tilling claws in the tiller according to claim 8 or 10, wherein the tilling claws are attached and have the smallest circumferential distance from the three tilling claws.
12. A rotation axis;
    A plurality of flanges provided at intervals in the axial direction of the rotary shaft;
    A plurality of tilling claws attachable to the flange;
    An arrangement structure of tilling claws in a tiller with
    Among the plurality of flanges, the tilling claws attached to the same flange are asymmetrical arrangement structures of the tilling claws in the tiller that are astigmatic.
13. The arrangement structure of the tilling claws in the tiller according to claim 12, wherein the plurality of flanges are attached with a phase shifted in one circumferential direction of the flange as going in the axial direction.

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