JP4119033B2 - Rotary tiller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a rotary cultivator in which a cultivating claw is provided on a cultivating shaft that extends from a transmission case to the left and right sides and is rotationally driven by an engine.
[0002]
[Prior art]
  Such rotary tillers are known from Japanese Utility Model Publication No. 57-86502, Japanese Patent Application Laid-Open No. 4-166424, and Japanese Patent Publication No. 46-39041.
[0003]
  Japanese Utility Model Laid-Open No. 57-86502 discloses a so-called front tine type rotary tiller in which a tilling shaft extending left and right from a mission case is provided with a number of tilling claws that also serve as traveling wheels.
[0004]
  JP-A-4-166424 discloses a cultivating shaft extending left and right from a cultivating mission case located on the rear side of the traveling mission case, and provided with a traveling wheel on an axle extending laterally from the traveling mission case. A so-called rear tine type rotary tiller provided with a number of tilling claws is described.
[0005]
  Japanese Patent Publication No. 46-39041 discloses a pair of a forward tiller shaft and a reverse tiller shaft that are fitted on the same axis and rotate in opposite directions on the left and right sides of the transmission case. There is described a rear tine type rotary tiller that balances a propulsive force generated by a tilling claw provided on a tilling shaft and a resistance force generated by a tilling claw provided on a reverse tilling shaft to prevent dashing.
[0006]
[Problems to be solved by the invention]
  By the way, in the front tine type rotary tiller, the tilling claw has both functions of generating tilling force and generating propulsion, so the thrust generated by the tilling claws is offset by the resistance force generated by the resistance bar. It is necessary to adjust the load applied by the operator to the resistance bar so as to obtain an appropriate forward speed. However, it is difficult for beginners to increase or decrease the magnitude of the resistance force generated by the resistance rod, and when the tilling nail floats up in a hard field without being able to cut into the soil, There is a possibility that a phenomenon (dashing phenomenon) may occur in which the propulsive force increases and the aircraft moves forward rapidly.
[0007]
  Also, the rear tine type rotary tiller has a problem that the stable tillage work becomes difficult because the balance between tillage force and propulsion force is lost when the tilling claws are not smoothly cut into the soil in a hard field.
[0008]
  The present invention has been made in view of the above circumstances,By using anchor nailsEven in a hard field, the tilling nail is surely cut into the soil so that stable tilling work can be performed.However, it is difficult for the grass to enter between the tip of the tilling nail and the tip of the anchor nail, reducing the winding of the grassFor the purpose.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, in the rotary tiller provided with tilling claws on the tilling shaft that extends from the transmission case to the left and right sides and is normally driven by the engine, Anchor nails that are curved toward the leading side in the direction of rotationIn the rotation plane of the tilling claw whose tip is curved to the rotation direction delay sideProvided on the tiller shaftThe tip of the tilling nail and the tip of the anchor nail were brought close to each otherA rotary cultivator characterized by this is proposed.
[0010]
  According to the above configuration, the anchor claw having the tilling claw provided with the tilling claw and driven forward is provided with the anchor claw whose tip is curved toward the rotation direction advance side, so that the anchor claw is pierced into the soil even in a hard field. Can be lifted. As a result, the tilling nail can be surely cut into the soil to exhibit the tilling performance, and the dashing of the machine body due to the lifting of the tilling nail can be prevented.Moreover, the tilling claw whose tip is curved toward the rotation direction delay side and the anchor claw whose tip is curved toward the rotation direction advance side are arranged in the same rotation plane so that the tip of the tilling nail and the tip of the anchor claw are mutually connected. Since it was made to approach, grass can hardly enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of the grass can be reduced.
[0011]
  And claims2According to the invention described in the above, in addition to the configuration of claim 1, a rotary tiller characterized in that an anchor claw is provided at the axially outer end of the tilling shaft is proposed.
[0012]
  According to the above configuration, the anchor claws are provided at the outer ends in the axial direction of the tillage shaft extending from the transmission case to the left and right sides, so that the tillers are straightened while suppressing the lifting of the tillage claws provided at the outer ends of the left and right tillage shafts. Can increase the sex.
[0013]
  And claims3According to the invention described in claim 1, in addition to the structure of claim 1, an anchor claw is provided between the rotating surface of the axially outer tilling claw and the rotating surface of the axially inner tilling claw. A cultivator is proposed.
[0014]
  According to the above configuration, since the anchor claw is disposed between the rotation surfaces of the axially outside and axially inside tillage claws, the propulsive force generated by the tillage claws is prevented from being hindered by the anchor claws, and the tillage performance In addition, it is possible to ensure both the anti-dashing performance and the driving force.
[0015]
  And claims4According to the invention described in (2), in addition to the configuration of claim 1, a rotary tiller characterized in that the tilling pawl and the anchor pawl are arranged on the opposite side with the tilling shaft as the center is proposed.
[0016]
  According to the said structure, since a tilling nail and an anchor nail | claw are attached with a phase difference of 180 degrees, a tilling nail and an anchor nail | claw can be made to act alternately and a tilling performance can be improved.
[0017]
  And claims5According to the invention described in claim 1,4In addition to any of the above structures, there is proposed a rotary cultivator characterized in that a soil release surface wider than the base end portion is formed at the tip end portion of the anchor claw.
[0018]
  According to the above configuration, since the wide soil release surface is formed at the tip of the anchor claw, when the anchor claw that has digged into the soil comes out into the air, the soil release surface repels the soil and pulverizes it finely Can do.
[0019]
  And claims6According to the invention described in (1), the forward rotation tillage shaft that extends from the transmission case to both sides in the axial direction and is normally driven by the engine, and is coaxially disposed outside the forward rotation tillage shaft in the axial direction and reversely rotated by the engine. In a rotary tiller that is provided with a driven claw on each of the driven reverse tillage shafts, at least one of the forward tillage shaft and the reverse tillage shaft is provided with an anchor claw that is curved toward the rotation direction advance side of the tillage shaft.The anchor claw is provided in the rotation surface of the tilling claw whose tip is curved to the rotation direction delay side, and the tip of the tilling claw and the tip of the anchor claw are brought close to each other.A rotary cultivator characterized by this is proposed.
[0020]
  According to the above configuration, since the tillage claws are provided on the forward tillage shaft and the reverse tillage shaft that extend coaxially from the mission case to both sides in the axial direction and rotate in opposite directions, respectively, Dashing can be prevented by offsetting the propulsion force of the tilling nail. In addition, the anchor claws that are curved toward the rotation direction advance side are provided on at least one of the forward and reverse tillage shafts, so that even in a hard field, the anchor claws are inserted into the soil to prevent the tilling nails from rising and It is possible to make sure that the inside of the machine is cut and the tilling performance is demonstrated, and the dashing of the airframe can be more reliably prevented.Moreover, the tilling claw whose tip is curved toward the rotation direction delay side and the anchor claw whose tip is curved toward the rotation direction advance side are arranged in the same rotation plane so that the tip of the tilling nail and the tip of the anchor claw are mutually connected. Since it was made to approach, grass can hardly enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of the grass can be reduced.
[0021]
  And claims7According to the invention described in claim6In addition to the above configuration, a rotary cultivator is proposed in which an anchor claw is provided between the rotation surface of the axially outside tillage claw and the rotation surface of the axially inside tillage claw.
[0022]
  According to the above configuration, since the anchor claw is disposed between the rotation surfaces of the axially outside and axially inside tillage claws, the propulsive force generated by the tillage claws is prevented from being hindered by the anchor claws, and the tillage performance In addition, it is possible to ensure both the anti-dashing performance and the driving force.
[0023]
  According to the invention described in claim 8, the claim6In addition to the above structure, there is proposed a rotary cultivator characterized in that anchor claws provided on the forward tillage shaft and anchor claws provided on the reverse tillage shaft are arranged adjacent to each other in the axial direction.
[0024]
  According to the above configuration, since the anchor pawl of the forward tillage shaft and the anchor pawl of the reverse tillage shaft are opposed to each other, the anchor that rotates the grass to be wrapped around the forward tillage shaft or the reverse tillage shaft in the reverse direction. It can be loosened with a nail to reduce the wrapping of the grass.
[0025]
  And claims9According to the invention described in claim6In addition to the above structure, there is proposed a rotary tiller characterized in that an anchor claw provided on the forward tillage shaft and an anchor claw provided on the reverse tillage shaft intersect in the soil.
[0026]
  According to the above configuration, since the forwardly rotating anchor claw and the reversely rotating anchor claw intersect in the soil, the resistance force generated by the forwardly rotating anchor claw and the propulsive force generated by the reversely rotating anchor claw are offset. The aircraft's running speed can be stabilized.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings. 1 to 4 show a first embodiment of the present invention. FIG. 1 is an overall side view of a front tine type walking rotary tiller, FIG. 2 is a view in the direction of the arrow 2 in FIG. FIG. 3 is a perspective view of the tillage section, taken along line 3-3 in FIG.
[0028]
  As shown in FIGS. 1 to 3, the front tine type walking rotary tiller T includes a lower engine cover 11 and a single cylinder engine E covered by an upper engine cover 12. Case 13 is coupled. A cooling fan 15 is provided at the upper end of the crankshaft 14 of the engine E arranged vertically, and the lower end is connected to a drive shaft 16 supported in the vertical direction inside the mission case 13 via a clutch 17. The A driven shaft 18 extending in the left-right direction of the vehicle body is supported at the lower end of the transmission case 13, and a worm 20 provided at the lower end of the drive shaft 16 is engaged with a worm wheel 19 provided at the center of the driven shaft 18. Accordingly, the rotation of the crankshaft 14 of the engine E is transmitted to the driven shaft 18 via the clutch 17, the drive shaft 16, the worm 20 and the worm wheel 19. A steering handle 22 extending rearward and upward of the vehicle body is detachably provided on a handle post 21 provided at the rear portion of the transmission case 13, and a resistance bar 23 is detachably provided on the handle post 21 via a bracket.
[0029]
  The inner ends of the left and right tillage shafts 24, 24 are fitted to the outer end of the driven shaft 18 protruding left and right from the mission case 13, and are coupled by pins 25, 25. These tillage shafts 24, 24 are in the forward rotation direction. That is, the cultivator T is driven in the forward direction. Each tilling shaft 24 is provided with six tilling claws 26a to 26f and three anchor claws 27a to 27c. Further, a gauge ring support shaft 29 provided with a gauge ring 28 is detachably attached to the tip of each tilling shaft 24 with a pin 30.
[0030]
  The tilling claws 26a to 26f made of a known nails are bent at the tip side of the plate-like blade toward the rotation direction lagging side and curved outward or inward in the axial direction of the tilling shaft 24. This makes it easy to cut into the soil of the field and effectively reverse the soil, thereby enhancing the tillage effect. On the other hand, the anchor claws 27a to 27c are members having a square bar cross section, and the tip side thereof is curved approximately 90 ° to the advance side in the rotational direction. Easily cut into the inside.
[0031]
  The tilling claws 26a to 26f and the anchor claws 27a to 27c can be arranged in various patterns, but in this embodiment, they are arranged in the following patterns. The arrangement pattern of the tilling claws 26a to 26f and the anchor claws 27a to 27c on the right tillage shaft 24 and the arrangement pattern of the tilling claws 26a to 26f and the anchor claws 27a to 27c on the left tilling shaft 24 are the center line CL. It is made symmetrical with respect to the left and right sides.
[0032]
  As apparent from FIGS. 2 and 4, each tilling shaft 24 is provided with four rows of mounting brackets 31a, 31b, 31c, 31d from the axially inner side (center line CL side) toward the axially outer side. . Here, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, and the fourth mounting bracket 31d are sequentially referred to from the inner side in the axial direction.
[0033]
  The innermost first mounting bracket 31a is provided with a tilling claw 26a that curves outward and a tilling claw 26b that curves inward, and the next second mounting bracket 31b has tilling claws 26c and 2 that curve outward. The anchor pawls 27a and 27b are provided, and the next third mounting bracket 31c is provided with a tilling pawl 26d that curves outward and an anchor pawl 27c, and is attached to the outermost fourth mounting bracket 31d. Are provided with a tilling claw 26e that curves outward and a tilling claw 26f that curves inward.
[0034]
  There is no functional difference between the four tilling claws 26a, 26c, 26d, and 26e curved outward in the axial direction and the two tilling claws 26b and 26f curved inward in the axial direction. It is necessary to consider that the bending direction of the tilling claws 26a to 26f is appropriately distributed inward and outward in the axial direction so that uniform tilling can be performed over the entire length of the left and right tilling shafts 24, 24.
[0035]
  By the way, in the conventional cultivator provided only with the tilling claw without having the anchor claw, when the surface of the field is hard, the tilling claw may not be cut into the soil and may float up. In such a case, the tilling claw functions as a mere wheel without exerting the tilling force, so that there may be a dashing phenomenon in which the body of the tiller advances rapidly.
[0036]
  On the other hand, according to the cultivator T of the present embodiment, the anchor claws 27a to 27c whose tip side is curved by approximately 90 ° toward the rotation direction advance side easily bite into the surface of a hard field and exhibit the anchor effect. The claws 26a to 26f can be reliably cut into the surface of the field without floating. As a result, the tilling effect of the tilling claws 26a to 26f can be surely exhibited, and the dashing of the body of the tiller T can be reliably prevented without requiring skill in the operation of the resistance rod 23.
[0037]
  Hereinafter, second to seventh embodiments of the present invention will be described with reference to FIGS. 5 to 10, only the right tillage part of the center line CL of the machine body is shown, but the left tillage part of the machine body has a symmetrical structure with the right tillage part across the center line CL. . The tilling claws 26a to 26f are actually curved outward or inward in the axial direction, but are not shown. Further, similarly to the first embodiment, the tilling claws 26a to 26f are curved toward the rotation direction delay side, and the anchor claws 27a and 27b are curved toward the rotation direction advance side.
[0038]
  In the second embodiment shown in FIG. 5, the first mounting bracket 31a, the second mounting bracket 31b, and the third mounting bracket 31c are provided at predetermined intervals from the inner side to the outer side of the tilling shaft 24. 31a is provided with two tilling claws 26a, 26b and one anchor claw 27a, and the middle second mounting bracket 31b is provided with one tilling claw 26c and one anchor claw 27b, The outer third mounting bracket 31c is provided with two tilling claws 26d, 26e and one anchor claw 27c. The tip of the tilling nail and the tip of the anchor nail in the same rotation plane are arranged so as to approach each other. Specifically, the tip of the tilling claw 26a attached to the first mounting bracket 31a and the tip of the anchor claw 27a approach each other, and the tip of the tilling claw 26c attached to the second mounting bracket 31b and the anchor claw 27b. The tips are close to each other, and the tips of the tilling claws 26d attached to the third mounting bracket 31c and the tips of the anchor claws 27c are close to each other.
[0039]
  According to the present embodiment, the tips of the tilling claws 26a, 26c, and 26d are always close to the tips of the anchor claws 27a, 27b, and 27c, so that the grass enters between them and winds around the tilling shaft 24. It can be effectively prevented.
[0040]
  In the third embodiment shown in FIG. 6, a first mounting bracket 31a, a second mounting bracket 31b, a third mounting bracket 31c, and a fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. The first to fourth mounting brackets 31a to 31d are provided with one tilling claw 26a to 26d and one anchor claw 27a to 27d, respectively. And each one tilling claw 26a-26d provided in each of the 1st-4th attachment brackets 31a-31d and each one anchor claw 27a-27d are attached with a phase difference of 180 degrees mutually. .
[0041]
  Specifically, the tilling claw 26a and the anchor claw 27a are attached to the first mounting bracket 31a with a phase difference of 180 °, and the tilling claw 26b and the anchor claw 27b are attached to the second mounting bracket 31b with a phase difference of 180 °. The tillage claw 26c and the anchor claw 27c are attached to the third attachment bracket 31c with a phase difference of 180 °, and the tillage claw 26d and the anchor claw 27d are attached to the fourth attachment bracket 31d with a phase difference of 180 °. . Each pair of tilling claws 26a to 26d and one anchor claw 27a to 27d provided on each of the first to fourth mounting brackets 31a to 31d has a circumferential difference of 90 ° from each other. Evenly arranged in the direction.
[0042]
  According to the present embodiment, as the tillage shaft 24 rotates, the tilling claws 26a to 26d and the anchor claws 27a to 27d are alternately bited into the soil, and uniform and effective tilling can be performed. In the fourth embodiment shown in FIG. 7, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, and the fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. The first mounting bracket 31a is provided with two tilling claws 26a, 26b, the second mounting bracket 31b is provided with one tilling claw 26c, and the third mounting bracket 31c is provided with one tilling claw 26d. The fourth mounting bracket 31d is provided with one tilling claw 26e and one anchor claw 27a.
[0043]
  According to the present embodiment, since the anchor claw 27a is provided on the fourth mounting bracket 31d at the outermost end of the tilling shaft 24 farthest from the center line CL, the tilling provided at the fourth mounting bracket 31d at the outermost end. The lifting of the claw 26e can be suppressed, and therefore the lifting of the tilling claws 26a to 26d provided on the inner first to third mounting brackets 31a to 31c is automatically suppressed. In addition, the propulsive force and the resistance force at the left and right ends of the tillage portion can be stabilized and the straightness of the tiller T can be improved.
[0044]
  In the fifth embodiment shown in FIG. 8, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, and the fourth mounting bracket 31d are provided at predetermined intervals from the inside to the outside of the tilling shaft 24. The first mounting bracket 31a is provided with one tilling claw 26a and one anchor claw 27a, the second mounting bracket 31b is provided with one tilling claw 26b, and the third mounting bracket 31c is provided with 1 Two tilling claws 26c are provided, and the second mounting bracket 31d is provided with two tilling claws 26d and 26e.
[0045]
  According to the present embodiment, since the anchor claw 27a is provided on the first mounting bracket 31a at the innermost end of the tillage shaft 24 closest to the center line CL, the anchor claw 27a pierces the uncultivated land near the mission case 13. That is, it is possible to avoid a situation where the grass pulled out by the tilling claws is wound around the anchor claws 27a.
[0046]
  In the sixth embodiment shown in FIG. 9, the first mounting bracket 31a, the second mounting bracket 31b, the third mounting bracket 31c, the fourth mounting bracket 31d, and the fifth mounting bracket 31e are spaced from the inside to the outside of the tilling shaft 24 by a predetermined distance. The first mounting bracket 31a is provided with two tilling claws 26a, 26b, the second mounting bracket 31b is provided with one tilling claw 26c, and the third mounting bracket 31c is 1 One tilling claw 26d is provided, one anchor claw 27a is provided on the fourth mounting bracket 31d, and two tilling claws 26e, 26f are provided on the fifth mounting bracket 31e.
[0047]
  According to the present embodiment, the four tilling claws 26a to 26d provided on the inner first to third mounting brackets 31a to 31c and the two tilling claws 26e and 26f provided on the outer fifth mounting bracket 31e are provided. Since the anchor claw 27a provided on the fourth mounting bracket 31d is disposed between the tillage claw 26a and 26f, the tilling claw 26a to 26f can generate a propulsive force without being inhibited by the anchor claw 27a, and the effect of the anchor claw 27a can be obtained. It is easy to secure the necessary driving force while demonstrating it.
[0048]
  The seventh embodiment shown in FIG. 10 has substantially the same arrangement of the tilling claws 26a to 26e and the anchor claws 27a as the fourth embodiment described in FIG. 7, but the shape of the anchor claws 27a is different. ing. That is, the anchor pawl 27a of the present embodiment has a soil release surface 27 whose width is wider than the width of the base end portion at the distal end portion that curves in the rotational direction advance side.₁Is formed.
[0049]
  According to the present embodiment, when the anchor claw 27a that has digged into the soil comes out of the soil into the air, the soil release surface 27₁The soil can be repelled and crushed effectively.
[0050]
  11 to 13 show an eighth embodiment of the present invention. FIG. 11 is an overall side view of a rear tine type walking rotary tiller. FIG. 12 is an enlarged sectional view taken along the line 12-12 in FIG. FIG. 3 is a perspective view of a tillage unit.
[0051]
  As shown in FIG. 11, the rear tine type walking rotary tiller T includes an engine bed 42 that extends forward from a traveling mission case 41 that supports a pair of left and right wheels W, W. Engine E is mounted on the top. A steering handle 45 is provided via a mounting bracket 44 at an upper part of a tilling mission case 43 provided continuously behind the traveling mission case 41. The upper surface of the rotary working machine 46 provided at the rear end of the plowing mission case 43 is covered with a rotary cover 47, and a resistance bar 48 that can be adjusted in the vertical position and a leveler that can swing up and down are provided at the rear of the rotary cover 47. A flat plate 49 is provided.
[0052]
  The crankshaft 50 of the engine E and the mission input shaft 51 are connected by an endless belt 53 having a tension clutch 52, and the transmission input gear 51 and the axle 54 are housed in the traveling mission case 41 and the endless gear train. They are connected by a chain 56. A forward / reverse rotation mechanism 57 of the rotary working machine 46 is accommodated at the rear end of the tillage mission case 43, and the forward / reverse rotation mechanism 57 is a transmission gear train via an endless chain 58 accommodated inside the tillage mission case 43. 55.
[0053]
  Next, the forward / reverse rotation mechanism 57 of the rotary working machine 46 will be described with reference to FIG.
[0054]
  The forward / reverse mechanism 57 of the rotary working machine 46 includes a large portion 61 at the rear end of the left case half 61 and the right case half 62 of the tilling mission case 43.₁62₁And a pair of right and left forward tillage shafts 64 and 64 supported coaxially by ball bearings 63 and 63, and left and right forward rotation tillage shafts 64 and 64 so as to be rotatable relative to each other and extend to the left and right. One reverse tillage shaft 65 is provided.
[0055]
  A counter shaft 66 is supported via a pair of ball bearings 67 and 67 in front of the forward tillage shafts 64 and 64 and the reverse tillage shaft 65. A driven sprocket 68 fixed to the counter shaft 66 is connected to the transmission gear train 55 through the endless chain 58. The first sprocket 69 fixed to the counter shaft 66 and the second sprocket 70 fixed to the reverse tillage shaft 65 are connected by an endless chain 71, whereby the reverse tillage shaft 65 is rotated in the same direction as the counter shaft 66 (rotary work). Driven in the direction opposite to the traveling direction of the machine 46.
[0056]
  On the other hand, a pair of first gears 72, 72 provided at both ends of the countershaft 66 mesh with a pair of second gears 73, 73 provided on the left and right forward tillage shafts 64, 64, respectively. Accordingly, the two forward tillage shafts 64 and 64 are driven in the forward direction (the same direction as the traveling direction of the rotary working machine 46) in the opposite direction to the counter shaft 66 and the reverse tillage shaft 65.
[0057]
  The gear ratio between the first sprocket 69 and the second sprocket 70 is set equal to the gear ratio between the first gears 72, 72 and the second gears 73, 73. The rotation speeds of the forward rotation tillage shafts 64 and 64 are equal to each other and are slightly decelerated with respect to the rotation speed of the counter shaft 66.
[0058]
  Next, the structure of the rotary working machine 46 will be described based on FIG. In FIG. 13, only the right half of the rotary working machine 46 that is symmetrical with respect to the center line CL of the machine is shown, and the left half is not shown. The tilling claws 26a to 26e provided on the forward tillage shaft 64 and the reverse tillage shaft 65 are curved to the rotation direction delay side of the forward rotation tillage shaft 64 and the reverse tillage shaft 65, respectively, and are curved outward or inward in the axial direction. However, only the curve on the rotation direction delay side is illustrated, and the curve in the axial direction is omitted. The anchor claw 27a is curved toward the rotation direction advance side of the reverse tillage shaft 65, and is not curved outward or inward in the axial direction.
[0059]
  As is apparent from FIG. 13, two forward tilling claws 26a and 26b are provided on the inner mounting bracket 31a of the forward tilling shaft 64 positioned on the inner side in the axial direction, and one on the outer mounting bracket 31b. The forward tillage claw 26c is provided. In addition, one reverse anchor claw 27a is provided on the inner mounting bracket 31c of the reverse tillage shaft 65 located on the outer side in the axial direction, and two reverse tillage claws 26d and 26e are provided on the outer mounting bracket 31d.
[0060]
  Thus, by providing the normal tillage shaft 64 provided with the normal tillage claws 26a to 26c and the reverse tillage shaft 65 provided with the reverse tillage claws 26d and 26e, the forward rotation tillage shaft 64 is generated. The propulsive force to the reverse and the backward propulsive force generated by the reverse tillage shaft 65 can be offset to prevent the aircraft from being dashed. Further, since the anchor pawls 27a are provided on the reverse tillage shaft 65 that generates the backward propulsion force, the lifting of the reverse tillage claws 26d and 26e of the reverse tillage shaft 65 is suppressed and the rearward propulsion force is prevented from increasing rapidly. be able to. Further, since the normal tillage shaft 64 and the reverse tillage shaft 65 are arranged on the same axis, the rising of the reverse tillage claws 26d and 26e is automatically suppressed, so that the normal tilling claws 26a to 26c are automatically lifted.
[0061]
  The ninth to twelfth embodiments of the present invention will be described below with reference to FIGS. These embodiments all correspond to the rotary working machine 46 provided with the forward tillage shaft 64 and the reverse tillage shaft 65, and FIGS. 14 to 17 show the same expressions as FIG. 13 corresponding to the eighth embodiment. Is going.
[0062]
  In the ninth embodiment shown in FIG. 14, the mounting brackets 31a and 31b on the inner side of the forward tilling shaft 64 are provided with one forward tilling claw 26a and one forward anchor claw 27a, and the outer mounting bracket. 31b is provided with one normal tillage claw 26b. Further, one reverse tillage claw 26c is provided on the inner mounting bracket 31c of the reverse tillage shaft 65, and two reverse tilling claws 26d and 26e are provided on the outer mounting bracket 31d.
[0063]
  According to the present embodiment, since the anchor pawl 27a is provided on the forward tillage shaft 64 that generates the forward propulsion force, the forward tillage pawls 26a and 26b of the forward tillage shaft 64 are prevented from being lifted forward. It is possible to prevent the propulsive force from rapidly increasing. Further, since the normal tillage shaft 64 and the reverse tillage shaft 65 are arranged on the same axis, the lifting of the normal tilling claws 26a and 26b is automatically suppressed, so that the lifting of the reverse tilling claws 26c to 26e is also automatically suppressed. In addition, since the tip of the forward rotation tillage claw 26a is close to the tip of the forward rotation anchor claw 27a, it is possible to effectively prevent grass from entering between the two and wrapping around the forward rotation tillage shaft 64.
[0064]
  In the tenth embodiment shown in FIG. 15, two forward tillage claws 26 a and 26 b are provided on the inner mounting bracket 31 a of the forward tilling shaft 64, and one forward anchor is provided on the outer mounting bracket 31 b. A claw 27a is provided. Further, one reverse anchor claw 27b is provided on the inner mounting bracket 31c of the reverse tillage shaft 65, and three reverse tillage claws 26c to 26e are provided on the outer mounting bracket 31d.
[0065]
  According to the present embodiment, since the forward rotation anchor claw 27a and the reverse rotation anchor claw 27b are provided at the outer end of the normal rotation tillage shaft 64 and the inner end of the reverse rotation tillage shaft 65, respectively, the normal rotation tillage shaft 64 or the reverse rotation The grass to be wound around the tilling shaft 65 can be loosened by the forward anchor claw 27a and the reverse anchor claw 27b rotating in the opposite directions to reduce the grass winding.
[0066]
  In the eleventh embodiment shown in FIG. 16, two normal rotation tillage claws 26a and 26b are provided on the inner mounting bracket 31a of the normal rotation tillage shaft 64, and one normal rotation tillage is provided on the outer mounting bracket 31b. A claw 26c is provided. Further, one reverse tillage claw 26d is provided on the inner mounting bracket 31c of the reverse tillage shaft 65, one reverse anchor claw 27a is provided on the middle mounting bracket 31d, and two on the outer mounting bracket 31e. Book reverse tillage claws 26e, 26f are provided.
[0067]
  According to the present embodiment, the reverse anchor pawl 27a is disposed so as to be sandwiched between the inner reverse tillage claw 26d and the outer reverse tillage claws 26e and 26f on the reverse tillage shaft 65. It is possible to reliably suppress the floating of both the reverse reverse tillage claws 26d and the outer reverse tillage claws 26e and 26f.
[0068]
  In the twelfth embodiment shown in FIG. 17, two forward rotation tillage claws 26a and 26b are provided on the inner mounting bracket 31a of the forward rotation tillage shaft 64, and one mounting bracket 31b from the inner side has one. A normal tiller claw 26c is provided, the third mounting bracket 31c from the inside is provided with one forward anchor claw 27a, and the outer mounting bracket 31d is provided with two forward tilling claws 26d and 26e. It is done. The mounting bracket 31e on the inner side of the reverse tillage shaft 65 is provided with one reverse tillage claw 26f, and the outer mounting bracket 31f is provided with two reverse tillage claws 26g and 26h.
[0069]
  According to the present embodiment, the forward rotation anchor claw 27a is disposed so as to be sandwiched between the forward rotation tillage claws 26a to 26c located on the inner side and the forward rotation tillage claws 26d and 26e located on the outer side of the forward rotation tillage shaft 64. Therefore, it is possible to reliably suppress the floating of both the normal tilling claws 26a to 26c located on the inner side and the normal tilling claws 26d and 26e located on the outer side with the common forward anchor claw 27a.
[0070]
  As shown in FIG. 18, in the case of having a plurality of forward anchor claws 27a, one forward anchor pawl 27a is always present between points a and b whose phases are shifted by 90 °. The anti-lifting effect by the forward anchor claws 27a... Can be continuously exhibited without interruption, and the anti-dashing effect can be further enhanced. For this purpose, it is necessary to set the phase difference between the adjacent normal anchor claws 27a to less than 90 °. This is also true for the reverse anchor claw. It is not always necessary to match the phases of the tilling claws 26a and the anchor claws 27a with the right half portion and the left half portion of the rotary work machine 46 sandwiching the center line CL. By appropriately shifting the phases, the anchor claws 18 can be positioned between points a and b in FIG. 18 while minimizing the number 27a.
[0071]
  When the forward anchor pawls 27a bite into the soil, the propulsive force in the forward direction of the aircraft decreases. When the reverse anchor pawls 27a ... bite into the soil, the forward thrust of the aircraft decreases, the forward anchors If the phases of the anchor claws 27a are set so that the claws 27a and the reverse anchor claws 27a intersect each other in the soil, fluctuations in the propulsive force of the airframe accompanying the rotation of the anchor claws 27a can be suppressed.
[0072]
  As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0073]
  For example, in the embodiment, the nails are illustrated as the tilling claws 26a to 26h, but other tilling nails such as flower-shaped nails can be used instead of the nails. Further, the tiller of the first to seventh embodiments can be applied to the rear tine type tiller T, and conversely, the tiller of the eighth to twelfth embodiments can be applied to the front tine type tiller T. Is possible.
[0074]
【The invention's effect】
  As described above, according to the first aspect of the present invention, since the tilling shaft provided with the tilling claw and driven forward is provided with the anchor claw whose tip is curved in the rotational direction advance side, even in a hard field Anchor nails can be pierced into the soil to prevent the tilling of the tilling nails. As a result, the tilling nail can be surely cut into the soil to exhibit the tilling performance, and the dashing of the machine body due to the lifting of the tilling nail can be prevented.Moreover, the tilling claw whose tip is curved toward the rotation direction delay side and the anchor claw whose tip is curved toward the rotation direction advance side are arranged in the same rotation plane so that the tip of the tilling nail and the tip of the anchor claw are mutually connected. Since it was made to approach, grass can hardly enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of the grass can be reduced.
[0075]
  And claims2According to the invention described in the above, since the anchor claws are provided at the outer ends in the axial direction of the tilling shaft extending from the transmission case to the left and right sides, the lifting of the tilling claws provided on the outer end sides of the left and right tilling shafts is suppressed. The straightness of the machine can be improved.
[0076]
  And claims3According to the invention described in the above, since the anchor claw is disposed between the rotation surfaces of the tilling claw on the axially outer side and the axially inner side, the propulsive force generated by the tilling claw is prevented from being hindered by the anchor claw. Thus, it is possible to achieve both securing of tillage performance and anti-dashing performance and securing of propulsive force.
[0077]
  And claims4According to the invention described in (1), since the tilling claw and the anchor claw are attached with a phase difference of 180 °, the tilling performance can be improved by causing the tilling claw and the anchor claw to act alternately.
[0078]
  And claims5According to the invention described in (2), since the wide soil release surface is formed at the tip of the anchor claw, when the anchor claw that has digged into the soil comes out into the air, Can be crushed.
[0079]
  And claims6According to the invention described in the above, since the tillage claws are provided on the forward rotation shaft and the reverse rotation shaft that extend coaxially on both sides in the axial direction from the mission case and rotate in opposite directions, respectively, the forward rotation shaft and the reverse rotation Dashing can be prevented by offsetting the propulsive force of the tilling claw of the tilling shaft. In addition, the anchor claws that are curved toward the rotation direction advance side are provided on at least one of the forward and reverse tillage shafts, so that even in a hard field, the anchor claws are inserted into the soil to prevent the tilling nails from rising and It is possible to make sure that the inside of the machine is cut and the tilling performance is demonstrated, and the dashing of the airframe can be more reliably prevented.Moreover, the tilling claw whose tip is curved toward the rotation direction delay side and the anchor claw whose tip is curved toward the rotation direction advance side are arranged in the same rotation plane so that the tip of the tilling nail and the tip of the anchor claw are mutually connected. Since it was made to approach, grass can hardly enter between the tip of the tilling nail and the tip of the anchor nail, and the winding of the grass can be reduced.  And claims7According to the invention described in the above, since the anchor claw is disposed between the rotation surfaces of the tilling claw on the axially outer side and the axially inner side, the propulsive force generated by the tilling claw is prevented from being hindered by the anchor claw. Thus, it is possible to achieve both securing of tillage performance and anti-dashing performance and securing of propulsive force.
[0080]
  And claims8According to the invention described in the above, since the anchor claws of the forward tillage shaft and the reverse tillage shaft are opposed to each other, the grass to be wound around the forward tillage shaft or the reverse tillage shaft is reversed in the reverse direction. It can be loosened with a rotating anchor claw to reduce grass wrapping.
[0081]
  And claims9According to the invention described in (1), since the forwardly rotating anchor claw and the reversely rotating anchor claw intersect in the soil, the resistance force generated by the forwardly rotating anchor claw and the propulsive force generated by the reversely rotating anchor claw and The traveling speed of the airframe can be stabilized by offsetting.
[Brief description of the drawings]
FIG. 1 is an overall side view of a front tine type walking rotary tiller.
FIG. 2 is a view taken in the direction of the arrow 2 in FIG.
3 is a view taken along line 3-3 in FIG.
FIG. 4 is a perspective view of a tillage unit.
FIG. 5 is a perspective view of a tillage unit according to a second embodiment of the present invention.
FIG. 6 is a perspective view of a tillage unit according to a third embodiment of the present invention.
FIG. 7 is a perspective view of a tillage unit according to a fourth embodiment of the present invention.
FIG. 8 is a perspective view of a tillage unit according to a fifth embodiment of the present invention.
FIG. 9 is a perspective view of a tillage unit according to a sixth embodiment of the present invention.
FIG. 10 is a perspective view of a tillage unit according to a seventh embodiment of the present invention.
FIG. 11 is an overall side view of a rear tine type walking rotary tiller according to an eighth embodiment of the present invention.
12 is an enlarged sectional view taken along line 12-12 of FIG.
FIG. 13 is a perspective view of a tillage unit.
FIG. 14 is a perspective view of a tillage unit according to a ninth embodiment of the present invention.
FIG. 15 is a perspective view of a tillage unit according to a tenth embodiment of the present invention.
FIG. 16 is a perspective view of a tillage unit according to an eleventh embodiment of the present invention.
FIG. 17 is a perspective view of a tillage unit according to a twelfth embodiment of the present invention.
FIG. 18 is a diagram showing the mounting phase of the anchor claw
[Explanation of symbols]
13 Mission case
24 tillage shaft
26a-26h tilling nail
27a-27d Anchor claw
27₁      Earth-moving surface
41 Tillage Mission Case (Mission Case)
64 Forward rotation shaft
65 Reverse tillage shaft
E engine

Claims (9)

In the rotary cultivator provided with cultivating claws (26a to 26f) on the cultivating shaft (24) that extends from the transmission case (13) to the left and right sides and is driven forward by the engine (E),
Tip provided tilling shaft in the plane of rotation of the rotational direction advances cultivator tip anchor claws (27a-27d) curved in side is curved in the rotational direction delayed side claw (26a~26f) (24), tilling claws A rotary tiller characterized in that the tip of (26a-26f) and the tip of the anchor claw (27a-27d) are brought close to each other .   The rotary cultivator according to claim 1, wherein anchor claws (27a to 27d) are provided at an axially outer end of the cultivating shaft (24).   The anchor claw (27a-27d) is provided between the rotation surface of the axially outside tilling claws (26a-26f) and the rotation surface of the axially inside tillage claws (26a-26f). Rotary tiller as described in   The rotary tiller according to claim 1, characterized in that the tilling claws (26a to 26f) and the anchor claws (27a to 27d) are arranged on the opposite side around the tilling axis (24). The rotary tiller according to any one of claims 1 to 4 , wherein a soil release surface (27 ₁ ) wider than the base end portion is formed at the tip end portion of the anchor claws (27a to 27d). A forward tillage shaft (64) that extends axially from the mission case (41) and is driven forward by the engine (E), and is coaxially disposed on the axially outer side of the forward rotation tillage shaft (64). In a rotary cultivator provided with cultivating claws (26a to 26h) on a reverse cultivating shaft (65) driven in reverse by the engine (E),
At least one of the forward tillage shaft (64) and the reverse tillage shaft (65) is provided with an anchor claw (27a, 27b) that is curved toward the rotation direction advance side of the tillage shaft (64, 65) , and the tip portion is in the rotation direction. Anchor claws (27a, 27b) are provided in the rotation surface of the tilling claws (26a-26h) curved to the delay side, and the tip portions of the tilling claws (26a-26h) and the anchor claws (27a, 27b) are mutually connected. rotary tiller, characterized in that is brought close to. Characterized in that a anchor pawl (27a, 27b) between the plane of rotation of the rotating surface and axially inner tilling claws axially outer tilling claws (26a~26h) (26a~26h), according to claim 6 Rotary tiller as described in An anchor claw (27a, 27b) provided on the forward tillage shaft (64) and an anchor claw (27a, 27b) provided on the reverse tillage shaft (65) are arranged adjacent to each other in the axial direction. The rotary cultivator according to claim 6 . Characterized in that the anchor pawl (27a, 27b) provided in the normal cultivating shaft (64) and the reverse rotation tilling shaft (65) to the provided anchor claws (27a, 27b) and intersect in the soil, according to claim 6 Rotary tiller as described in

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