JP6484153B2 - Arrangement structure of tilling claws in a tiller - Google Patents

Description

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

  Conventionally, technologies disclosed in Patent Document 1 and Patent Document 2 are known as rotary tillers. The rotary tiller shown 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.

JP-A-9-248002 JP-A-11-46501

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.
Therefore, the present invention provides an arrangement structure of tilling nails in a tiller that can satisfactorily exert tilling performance regardless of which of the tilling claws is attached when two kinds of tilling claws are selectively attached. With the goal.

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 rotating shaft, and an arrangement structure of tilling claws in a tiller, wherein the rotating shaft is rotated once and developed. In the case where the plurality of first tilling claws are attached to the plurality of flanges, when the direction of inclination of the line when connecting the plurality of claws facing the same direction in the axial direction is the alignment direction , said arrangement direction of the first tilling claws adjacent and same direction in the axial direction, said in a plurality of states mounted a plurality of second tilling claws to the flange, a second adjacent and same direction in the axial direction wherein the tilling claws arrangement direction is different from direction It is.

Moreover, the angle with respect to the axial direction of the said alignment direction in the said 1st tilling nail | claw differs from the angle with respect to the axial direction of the said alignment direction in the said 2nd tilling nail.
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 second tilling claws facing the direction is different, and the plurality of attachment portions are provided on the same circumference around the rotation axis, and the first tilling claws and the second tilling claws And the first, A maximum rotation locus of the first tilling claws in a state where耘爪is attached, and a maximum rotation locus of the second tilling claws in a state where the second tilling claws fitted substantially coincides.

Further, the distance between the first tillage claws is smaller than the distance between the second tillage claws.

Further, the first tilling claw is attached to all the attaching portions, and the second tilling claw is attached to some attaching portions of the plurality of attaching portions.

The present invention has the following effects.
The alignment direction of the first tilling claws adjacent and same direction in the axial direction and the arrangement direction in the opposite direction in the second tilling claws adjacent and same direction in the axial direction. 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.

Moreover, the angle with respect to the axial direction of the alignment direction in the 1st tilling nail and the angle with respect to the axial direction of the alignment direction in the 2nd tilling 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.

It is a side view of a rotary tiller. It is sectional drawing of the rotary tiller which showed a part in the plane and a part in 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.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
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. 2 is the left, and the direction of arrow B2 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.

  A support shaft 9 </ b> L that is rotatable about a horizontal axis (axis in the machine body width direction X <b> 1) is provided at the lower part of the transmission case 6. 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.

  As shown in FIGS. 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 F <b> 1 to F <b> 9 are arranged along the axial direction X <b> 2 (machine body width direction X <b> 1) of the rotary shaft 10 and are attached to the rotary shaft 10 by welding or the like. In the present embodiment, nine flanges F <b> 1 to F <b> 9 are attached to the rotary shaft 10.

  Plural kinds of tilling claws (L1 to L48, N1 to N32) for tilling 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 configuration of the tilling claws will be described later. The rotary shaft 23, the flanges F1 to F9, and the tilling claws (L1 to L48, N1 to N32) constitute a rotary tilling portion 23.

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 F <b> 1 to F <b> 9 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 <b> 1 to F <b> 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 F <b> 1 to F <b> 9. The plurality of attachment 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 attachment part 30 has the 1st penetration hole 31 and the 2nd penetration hole 32 which were provided at intervals in peripheral direction C1 of flanges F1-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 center 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. Moreover, when the reversibility of soil is requested | required, the nail | claws N1-N32 which become all the flanges F1-F9 are attached. 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. The L-shaped claws L <b> 1 to L <b> 48 have 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 L <b> 1 to L <b> 48. 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 in a state where the base portion 46 is overlapped with the side surfaces of the flanges F1 to F9. 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-N32 have the base 53, the straight blade part 54, and the curved part 55. FIG.
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 nails N1 to N32 are attached.
First, a 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-shaped claws L1 to L3 attached to the flange F1 are right-hand 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. The left-handed 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, the 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.

Moreover, the direction of the adjacent nail | claw among the nail | claws N3-N6 attached to the flange F2 differs. 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 nails 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”. The maximum rotation trajectory of the nails N1 to N32 when the nails 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 tillage claws do not change. Therefore, the rotary tillage portion 23 and the rotary tillage portion 23 The gap between the rotary cover (the first cover 24 and the like) covering the cover can be made substantially the same with the case where the claws N1 to N32 are attached, which is the case where the L-shaped 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 focusing on a predetermined mounting portion 30 (a certain one 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, also 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. It is the figure which represented the position of -L48 as an expanded 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-type claws, the distance between the L-type 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 alignment of the axial direction X2 in the L-shaped claws (the L-shaped claws in which the horizontal 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 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.

20A and 20B, as shown in FIGS. 10B to 18B, in a state where the claws N1 to N32 are attached to the flanges F1 to F9, the claws N1 when the rotary shaft 10 is rotated once (360 ° rotation). It is the figure which represented the position of -N32 as an expanded 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 arrangement of the axial direction X2 of the nails that face 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 the “seventh nail arrangement 72”, and the arrangement of the 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 nails along the 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 array of the L-shaped nails may be different from each angle of each array of the nail nails, or some 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. The nail distance L ₁ is smaller than the nail distance L ₂ .

The nail distance L ₁ L-shaped nails, among flanges F1 to F9, in the case of expand the L-shaped claw which is attached to the same flange, the distance between two L-shaped claw facing the same direction. 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 L2 between the claws of the nails is the distance between the _two nails facing in the same direction when the nails attached to the same flange among the flanges F1 to F9 are developed. 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.
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 claws (L-shaped claws)
N1 to N32 2nd tillage nail

Claims (5)

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
When the rotation axis is rotated once and shown as a development view, when the direction of inclination of the line when connecting a plurality of claws facing the same direction in the axial direction is the alignment direction,
Mounting in the state of attaching the plurality of first tilling claws to the plurality of flanges, said arrangement direction of the first tilling claws adjacent and same direction in the axial direction, a plurality of second tilling claws to the plurality of flanges in state, arrangement of tilling claws in tiller and the arrangement direction in the second tilling claws adjacent and same direction in the axial direction is different orientations. Arrangement of tilling claws in tiller according the the angle to the direction of arrangement of the axial direction, to claim 1 where the angle is different for the direction of arrangement of the axial direction in the second tilling claws in the first tilling claws. 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 In the state where is attached, the distance between the nail of the second tillage nail attached to the same flange and facing the same direction is different ,
The plurality of attachment portions are provided on the same circumference with the rotation axis as a center and are used to attach the first tillage claw and the second tillage claw,
Tillage in which 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. Arrangement structure of tilling nails in the machine.   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. The said 1st tilling nail is attached to all the said attaching parts, and the said 2nd tilling nail is attached to some attaching parts among these attachment parts. Arrangement structure of tilling claws in the described tiller.

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