JP2019024322A - Agricultural implement - Google Patents

Abstract

To provide an agricultural implement capable of obtaining sufficient tillage capacity, concerning an agricultural implement obtaining power by traction.SOLUTION: An agricultural implement has a first rotor provided with a plurality of first tilling claws, and generating rotation power by application of soil to the first tilling claws, and a second rotor provided with a plurality of second tilling claws having a shape different from the first tilling claws, and rotating by the rotation power generated in the first rotor, and a first rotation locus of the first rotor is superposed on a second rotation locus of the second rotor in a side view.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an agricultural machine. In particular, the present invention relates to a farm work machine including a work rotor for plowing a farm field.

  2. Description of the Related Art Conventionally, there is known an agricultural machine that is attached to a rear portion of a tractor via a hitch mechanism and obtains a driving force by being pulled by the tractor. For example, the agricultural working machine described in Patent Document 1 is attached to the rear part of a tractor, and when pulled, the front-side work rotor rotates to generate power, and the power is transmitted to the rear side via a chain mechanism. The structure is transmitted to the working rotor. In the agricultural machine having such a structure, the front and rear work rotors rotate as the tractor travels, so that the tilling claws provided on the respective work rotors plow the field.

  The agricultural machine described in Patent Document 1 is configured such that the rear working rotor rotates at a speed of 2 to 4 times with respect to the front working rotor by adjusting the gear ratio. With this configuration, the rotational speed of the rear working rotor becomes larger than the rotational speed of the front working rotor, and the work efficiency of the rear working rotor is improved.

U.S. Pat. No. 4,492,273

  However, in the agricultural machine shown in Patent Document 1, the claws used for each of the front-side work rotor and the rear-side work rotor have the same shape. Therefore, sufficient tilling ability could not be obtained in the tilling work by the rear working rotor.

  This invention is made | formed in view of such a subject, and it aims at providing the agricultural machine which can obtain sufficient tillage capability in the agricultural machine which acquires motive power by towing.

  The agricultural machine according to an embodiment of the present invention is different from the first tilling claw, in which a plurality of first tilling claws are provided, and the first rotor that generates rotational power when soil acts on the first tilling claws. A plurality of second tilling claws having a shape, and a second rotor that is rotated by rotational power generated in the first rotor, and in a side view, the first rotation trajectory of the first rotor and the second rotor It overlaps with the second rotation locus of the two rotors.

  The width of the first tillage claw in the rotation axis direction of the first rotor may be smaller than the width of the second tillage claw in the rotation axis direction of the second rotor.

  The area of the mapping of the first tillage nail onto the front projection surface when the tip of the first tillage nail is at the lowest position is the front projection when the tip of the second tillage nail is at the lowest position. It may be larger than the area of the mapping of the second tillage nail onto the surface.

  The first tillage claw has a plate-like first part having a first end closest to the rotation axis of the second tillage claw, and a plate shape closer to the rotation axis of the first tillage claw than the first part. The second portion, and a bent portion between the first portion and the second portion, and the second tillage claw includes a plate-shaped third portion and the third portion to the first portion. A curved portion having a second end that is curved in the direction of the rotation axis of the tillage claw and is closest to the rotation axis of the first tillage claw.

  In a side view, the first end portion may reach the third portion beyond the curved portion.

  According to the agricultural machine according to the present invention, it is possible to provide an agricultural machine that can obtain sufficient tillage ability in an agricultural machine that obtains power by towing.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which looked at the whole structure of the agricultural working machine which concerns on one Embodiment of this invention from the back left diagonal. It is the schematic which looked at the whole structure of the agricultural machine concerning one Embodiment of this invention from upper direction. It is the schematic which looked at the whole structure of the agricultural working machine which concerns on one Embodiment of this invention from diagonally upward of the front side. It is the figure which looked at the whole structure of the agricultural working machine which concerns on one Embodiment of this invention from the side. The side view (A) which shows the positional relationship of the 1st work rotor of the agricultural working machine concerning one embodiment of the present invention, and the 2nd work rotor, and the rotation locus of the 1st work rotor in the side view, and the rotation locus of the 2nd work rotor FIG. It is a top view which shows the positional relationship of the 1st work rotor of the agricultural working machine which concerns on one Embodiment of this invention, and a 2nd work rotor. It is a perspective view (A), a top view (B), a side view (C), and a front view (D) showing a front tillage claw of an agricultural working machine according to an embodiment of the present invention. It is a figure which shows the mapping of the 1st tilling nail and the 2nd tilling nail to the front projection surface in the state where the 1st tilling nail and the 2nd tilling nail of the agricultural working machine concerning one embodiment of the present invention fell down most. . It is the expansion perspective view which looked at the whole structure of the agricultural working machine which concerns on one Embodiment of this invention from the left diagonal on the front side. It is the enlarged view which looked at the subsoiler and front work rotor of the agricultural working machine which concerns on one Embodiment of this invention from the front.

  Hereinafter, an embodiment of an agricultural machine according to the present invention will be described with reference to the drawings. However, the agricultural machine of the present invention can be implemented in many different modes, and is not construed as being limited to the description of the examples shown below. Note that in the drawings referred to in this embodiment, the same portions or portions having similar functions are denoted by the same reference numerals, and repetitive description thereof is omitted.

  For convenience of explanation, words indicating directions such as upward, downward, forward, backward, rightward, and leftward are used, but the direction in which gravity works is downward, and vice versa. The traveling direction of the traveling machine body is the front, and the reverse is the rear. Furthermore, toward the front, the right side is right and the left side is left.

  In the present specification, a tilling work machine including a work rotor will be described as an example of a farm work machine. However, the present invention can be applied to all farm work machines including at least two work rotors.

<First Embodiment>
[Configuration of Farm Machine 100]
A configuration of the agricultural machine 100 according to the present embodiment will be described. In the present embodiment, an example of a farming machine 100 that is attached to the rear part of a traveling machine body such as a tractor and that is pulled by the traveling machine body to plow a farm field is illustrated.

  FIG. 1 is a schematic view of an overall configuration of an agricultural working machine according to an embodiment of the present invention as viewed from the rear left side. FIG. 2 is a schematic view of the entire configuration of the agricultural machine according to the embodiment of the present invention as viewed from above. FIG. 3 is a schematic view of the entire configuration of the agricultural machine according to the embodiment of the present invention as viewed from the diagonally upper side on the front side. 1 to 3 show a schematic configuration of the agricultural working machine 100 according to the present embodiment, and some components are not shown for convenience of explanation.

  The farm work machine 100 of this embodiment is roughly divided and includes a mounting part 10, a tilling work part 20, and a pressure reducing work part 30. Hereinafter, each part will be described in detail.

  The mounting portion 10 includes a top mast 11, a pair of lower links 12a and 12b, a pair of support members 13a and 13b, and a pair of connecting members 14a and 14b.

  The support members 13 a and 13 b are fixed to the first support frame 21 and the second support frame 22 of the tillage working unit 20 and support the top mast 11. The lower links 12 a and 12 b are directly fixed to the first support frame 21. The connecting members 14a and 14b connect the top mast 11 and the lower links 12a and 12b.

  The top mast 11 and the lower links 12a and 12b are connected to a three-point link mechanism (not shown) provided at the rear of the traveling machine body such as a tractor. Since the structure of the three-point link mechanism is well-known, description here is omitted. By connecting the mounting part 10 to the three-point link mechanism of the traveling machine body, the agricultural working machine 100 of this embodiment is mounted on the rear part of the traveling machine body.

  The tilling work unit 20 includes a first support frame 21, a second support frame 22, a pair of side plates 23a and 23b, a shield cover 24, a first work rotor 25, a second work rotor 26, a plurality of subsoilers 27, and a pair of restrictions. The members 29a and 29b and the speed increasing mechanism 40 are provided.

  The first support frame 21 and the second support frame 22 are connected to the side plates 23a and 23b and support the side plates 23a and 23b. Further, as described above, the first support frame 21 and the second support frame 22 support the top mast 11 via the support members 13a and 13b. The first support frame 21 further supports the lower links 12a and 12b.

  Further, the first support frame 21 supports a plurality of subsoilers 27. The plurality of subsoilers 27 are detachably fixed to the first support frame 21 via fixing members 28, respectively. The subsoiler 27 is provided between a plurality of first tillage claw rotating bodies 25d described later. The subsoiler 27 is a part that crushes and softens the subsoil (also referred to as lower layer soil) as the traveling machine body travels, and a plurality of subsoilers 27 are fixed to the first support frame 21. The fixing member 28 can be attached to an arbitrary position of the first support frame 21.

  A first work rotor 25 and a second work rotor 26 are installed between the side plates 23a and 23b. The shield cover 24 is installed between the side plates 23 a and 23 b and covers the first work rotor 25 and the second work rotor 26. The first support frame 21, the second support frame 22, and the side plates 23a and 23b may be simply referred to as a frame. In this case, it can also be said that the first working rotor 25, the second working rotor 26, and the subsoiler 27 are attached to the frame. The shield cover 24 plays a role of preventing upward scattering of soil blocks during the tilling work of the first work rotor 25 and the second work rotor 26.

  Further, regulating members 29a and 29b are attached to the side plates 23a and 23b, respectively. These regulating members 29a and 29b function as means for regulating the vertical movement of a pair of first support arms 33a and 33b that support a first basket roller 31 described later.

  The first working rotor 25 includes a first claw shaft 25a and a plurality of first tilling claws 25b. A plurality of first tilling claws 25b are arranged around the shaft at a predetermined mounting position of the first claw shaft 25a. Although details will be described later, a plurality of claw flanges 25c are fixed to the first claw shaft 25a, and a plurality of first tilling claws 25b are fixed to each of the plurality of claw flanges 25c. A structure in which a plurality of first tilling claws 25b are fixed to one claw flange 25c is referred to as a first tilling claw rotating body 25d. In the present embodiment, six first tilling claws 25b are attached to one claw flange 25c. A plurality of mounting positions of the first tilling claws 25b are provided at a predetermined interval in the longitudinal direction of the first pawl shaft 25a. When the farm work machine 100 travels, the soil acts on the first tillage claw 25b, and rotational power is generated in the first work rotor 25.

  The second working rotor 26 includes a second claw shaft 26a and a plurality of second tilling claws 26b. Similar to the first work rotor 25, a plurality of second tillage claws 26b are also arranged around the axis at a predetermined mounting position of the second claw shaft 26a. Although details will be described later, a plurality of claw flanges 26c are fixed to the second claw shaft 26a, and a plurality of second tillage claws 26b are fixed to one claw flange 26c in each of the plurality of claw flanges 26c. . A structure in which a plurality of second tillage claws 26b are fixed to one claw flange 26c is referred to as a second tillage claw rotating body 26d. In the present embodiment, six second tilling claws 26b are attached. A plurality of mounting positions of the second tillage claw 26b are provided at a predetermined interval in the longitudinal direction of the second claw shaft 26a. The second work rotor 26 is rotated by the rotational power generated by the first work rotor 25.

  The shape of the first tilling claw 25b of the first working rotor 25 is different from the shape of the second tilling claw 26b of the second working rotor 26. The first tilling claw 25b has a shape suitable for generating rotational power, and the second tilling claw 26b has a shape suitable for tilling the soil. The shape of each of the first tillage claw 25b and the second tillage claw 26b will be described in detail later.

  In the present embodiment, the first tillage claw 25b is attached to the first claw shaft 25a with a phase shifted between adjacent attachment positions. That is, when the first work rotor 25 is viewed from the direction (left-right direction) along the first claw shaft 25a, the plurality of adjacent first tilling claws 25b at each mounting position are from one side of the first claw shaft 25a. It arrange | positions helically toward the other side. The second tillage claw 26b is also mounted on the second claw shaft 26a with the same configuration. Thereby, while the resistance at the time of tilling of the 1st working rotor 25 and the 2nd working rotor 26 can be made small, the uniform agricultural field surface with few unevenness | corrugations can be obtained.

  Moreover, the 1st nail | claw axis | shaft 25a and the 2nd nail | claw axis | shaft 26a are rotatably attached via the bearing etc. with respect to the side plates 23a and 23b, respectively. Further, the first claw shaft 25 a and the second claw shaft 26 a can be interlocked with each other via the speed increasing mechanism 40. In the present embodiment, the speed increasing mechanism 40 is provided on the side plate 23a, and the periphery thereof is protected by the cover member 40a.

  The speed increasing mechanism 40 has a function of increasing the rotation speed of the second work rotor 26 more than the rotation speed of the first work rotor 25. For example, in the present embodiment, the speed increasing mechanism 40 causes the second work rotor 26 to rotate at a speed approximately three times that of the first work rotor 25. In the present embodiment, the speed increasing mechanism 40 is configured by combining a plurality of sprockets having different sizes and a roller chain installed on the plurality of sprockets. However, the speed increasing mechanism 40 can be configured by combining a plurality of spur gears having different numbers of teeth.

  The pressure reducing operation unit 30 includes a first basket roller 31, a second basket roller 32, a pair of first support arms 33a and 33b, and a pair of second support arms 34a and 34b.

  The first basket roller 31 has a structure in which a plurality of flat bars 31b are installed on a plurality of ring-shaped support members 31a. Similarly, the second basket roller 32 has a structure in which a plurality of flat bars 32b are installed on a plurality of ring-shaped support members 32a. Although not shown in the present embodiment, both the support member 31a and the support member 32a have a rotation shaft inside an opening provided near the center. That is, the first basket roller 31 and the second basket roller 32 rotate around a rotation shaft (not shown).

  In the agricultural working machine 100 according to the present embodiment, when the traveling machine body travels forward as it travels, the first basket roller 31 and the second basket roller 32 travel while rotating after the plowing work unit 20 has passed. At that time, the plurality of flat bars 31b and 32b are configured to crush and crush the soil blocks in the field cultivated by the tilling work unit 20.

  The first basket roller 31 is rotatably supported by the first support arms 33a and 33b. One end of the first support arms 33a and 33b is rotatably connected to the side plates 23a and 23b, and the other end is connected to a rotating shaft (not shown) of the first basket roller 31. As described above, the vertical movement of the first support arms 33 a and 33 b can be restricted by the restriction members 29 a and 29 b provided in the tilling work unit 20.

  The second basket roller 32 is rotatably supported by a pair of second support arms 34a and 34b. One ends of the second support arms 34a and 34b are rotatably connected to the first support arms 33a and 33b, and the other ends are connected to a rotation shaft (not shown) of the second basket roller 32. In the present embodiment, since one end of the second support arms 34a and 34b is rotatably connected to the first support arms 33a and 33b, the first basket roller 31 and the second basket roller 32 can move in the vertical direction. There is freedom.

  Further, for example, an electric cylinder or the like is installed between the second support frame 22 (or the first support frame 21) and the second support arms 34a and 34b, and the second basket roller 32 can be lifted to an arbitrary position. It is good also as a structure. In this case, it is possible to perform soil crushing and crushing in the field with only the first basket roller 31. Further, in the case of such a structure, since the load of the second basket roller 32 is applied to the first basket roller 31, it is possible to improve the pressure suppressing performance of the first basket roller 31.

  As described above, the agricultural working machine 100 of the present embodiment is pulled as the traveling machine body travels, and cultivates the field surface by the action of the first work rotor 25 and the second work rotor 26. The soil blocks in the field cultivated by the first work rotor 25 and the second work rotor 26 are crushed and crushed by the action of the first basket roller 31 and the second basket roller 32.

[Configuration of the first working rotor 25 and the second working rotor 26]
Detailed configurations of the first working rotor 25 and the second working rotor 26 will be described with reference to FIGS. 4 to 7. FIG. 4 is a side view of the entire configuration of the agricultural machine according to the embodiment of the present invention. FIG. 5: is a side view (A) which shows the positional relationship of the 1st work rotor of the agricultural working machine which concerns on one Embodiment of this invention, and a 2nd work rotor, and the rotation locus | trajectory of a 1st work rotor and a 2nd work rotor in a side view. It is a figure (B) which shows the area | region with which the rotation locus | trajectory overlaps. FIG. 6 is a top view showing the positional relationship between the first work rotor and the second work rotor of the agricultural machine according to the embodiment of the present invention. FIG. 7 is a perspective view (A), a top view (B), a side view (C), and a front view (D) showing a front tillage claw of a farm working machine according to an embodiment of the present invention.

  As shown in FIG. 4, the first working rotor 25 and the second working rotor 26 installed between the side plates 23 a and 23 b are in a positional relationship overlapping each other in a side view. A part of the subsoiler 27 overlaps the first work rotor 25 in a side view. The configuration of the subsoiler 27 and the positional relationship between the subsoiler 27 and the first work rotor 25 will be described in detail later.

  As shown in FIG. 5A, when the first working rotor 25 rotates, the tip of the first tillage claw 25b, that is, the locus of the place farthest from the first claw shaft 25a of the first tillage claw 25b is shown. This is shown as a rotation locus 250. Similarly, the tip of the second tillage claw 26b when the second working rotor 26 rotates, that is, the locus of the second furrow claw 26b farthest from the second claw shaft 26a is shown as a rotation locus 260. . In the side view, the rotation locus 250 and the rotation locus 260 are overlapped. As shown in FIG. 5B, a region 256 where the rotation locus 250 and the rotation locus 260 overlap is indicated by hatching in a side view.

  The radius of the rotation locus 250 is larger than the radius of the rotation locus 260. As shown in FIG. 5, the rotation locus 250 of the first working rotor 25 overlaps with the claw flange 26 c of the second working rotor 26 in a side view. On the other hand, the rotation locus 260 of the second work rotor 26 does not overlap with the claw flange 25c of the first work rotor 25 in a side view. In addition, the position of the 1st nail | claw axis | shaft 25a and the 2nd nail | claw axis | shaft 26a is adjusted so that the lower end of the rotation locus | trajectory 250 and the lower end of the rotation locus | trajectory 260 may become a horizontal position.

  In the top view shown in FIG. 6, the first tilling claw 25b is closest to and away from the second claw shaft 26a, and the second tilling claw 26b is closest to and away from the first claw shaft 25a. It is a top view which shows a state. In the state shown in FIG. 6, the distance L1 between the first tilling claw 25b and the second claw shaft 26a is shorter than the distance L2 between the second tilling claw 26b and the first claw shaft 25a. In FIG. 6, the first direction D1 is a direction in which the rotation shaft (first claw shaft 25a) of the first working rotor 25 extends. That is, the first direction D1 is the longitudinal direction of the first claw shaft 25a. The second direction D2 is the front (advancing direction of the farm work machine 100) in a state where the tip of the first tilling claw 25b is lowered to the lowest.

  As shown in FIG. 6, the second tillage claw 26 b has a plate-like linear part 261 (third part) and a curved part 263. The bending portion 263 has a shape in which a plate-like member is bent with a direction orthogonal to the longitudinal direction of the plate-like member as an axis. In other words, as shown in FIGS. 4 and 5, in the state where the tip of the second tillage claw 26 b is lowered to the lowest position, the direction of the axis (curvature axis) of the bending portion 263 is a horizontal component rather than a vertical component. Is bigger. In other words, the direction of the bending axis of the bending portion 263 is closer to the tangential direction around the second claw shaft 26a than the direction away from the second claw shaft 26a. In the state shown in FIG. 6, the bending portion 263 is bent from the linear portion 261 in the longitudinal direction of the first claw shaft 25a. The curved portion 263 has an end portion 265 (second end portion) closest to the first claw shaft 25a.

  Although the detailed shape of the 1st tillage nail | claw 25b is demonstrated later, the front-end | tip of the edge part 255 of the 1st tillage nail | claw 25b has extended to the linear part 261 over the curved part 263 in the 2nd direction D2. That is, the end portion 255 overlaps the linear portion 261 in the second direction D2. The second direction D2 is a direction orthogonal to the first direction D1. In the second direction D2, the distance L3 at which the first tilling claw 25b overlaps with the linear portion 261 is longer than the distance L1 between the first tilling claw 25b and the second claw shaft 26a in the state of FIG. The distance L3 is preferably at least twice the distance L1. More preferably, the distance L3 is 4 times or more than the distance L1. In the present embodiment, the distance L1 is about 20 mm, and the distance L3 is about 80 mm. However, the distance L1 may be the same as the distance L3, and the distance L1 may be longer than the distance L3.

  As described above, the rotation speed of the second work rotor 26 is faster than the rotation speed of the first work rotor 25. Further, the second tillage claw 26b has a shape suitable for tillage. Therefore, the soil of the soil is sprung up by the work of the second work rotor 26, and a lot of soil adheres to the second claw shaft 26a. As described above, when the tip of the end portion 255 of the first tillage claw 25b approaches the second claw shaft 26a, the soil attached to the second claw shaft 26a can be removed. However, it is necessary to design the distance L1 so that the first tilling claw 25b and the second claw shaft 26a do not contact each other. The distance L1 is determined by the amount of deflection of the second claw shaft 26a.

  As shown in FIG. 6, in the first direction D1, the width W1 of the first tillage claw 25b is smaller than the width W2 of the second tillage claw 26b. In order to avoid interference between the first tillage claw 25b and the second tillage claw 26b, in the first direction D1, the end 258 of the first tillage claw 25b on the second tillage claw 26b side and the second tillage claw 26b side It is necessary to provide the offset portion OS between the end 268 on the side of the first tillage claw 25b. The tilling ability of the second tilling claw 26b is higher than the tilling ability of the first tilling claw 25b (cultivating a lot of soil by one action). Therefore, in order to increase the tilling ability of the agricultural working machine 100, it is preferable to arrange the second tilling claws 26b as densely as possible in the first direction D1. By making the width W1 of the first tilling claws 25b smaller than the width W2 of the second tilling claws 26b, the arrangement of the second tilling claws 26b in the first direction D1 can be made dense.

  FIG. 7 is a perspective view (A), a top view (B), a side view (C), and a front view (D) showing a front tillage claw of a farm working machine according to an embodiment of the present invention. In FIG. 7, a top view (B) is a perspective view (A) viewed from the direction B. The side view (C) is a view of the perspective view (A) viewed from the direction C. Front view (D) is a perspective view (A) viewed from the direction D. FIG. The first direction D1 and the second direction D2 in FIG. 7B indicate the same directions as the first direction D1 and the second direction D2 in FIG.

  As shown in FIG. 7A, the first tillage claw 25 b has a rectangular plate-like member bent at a bent portion 251. That is, the front end portion 252-1 (first portion) and the root portion 252-2 (second portion) of the first tillage claw 25b are each plate-shaped. Further, the bent portion 251 is provided between the distal end portion 252-1 and the root portion 252-2. As shown in FIGS. 4 and 5, in the state where the tip of the first tillage claw 25 b is lowered to the lowest position, the direction of the bending axis of the bending portion 251 (bending axis) is more in the vertical component than in the horizontal component. large. In other words, the direction of the bending axis of the bending portion 251 is closer to the direction away from the first claw shaft 25a than the tangential direction centering on the first claw shaft 25a.

  As shown in FIG.6 and FIG.7, the location closest to the 2nd nail | claw axis | shaft 26a among the front-end | tip parts 252-1 is called the edge part 255 (1st edge part). The end portion 255 is provided at the tip on the opposite side of the through hole 253 with respect to the bent portion 251. As shown in FIG. 7C, the shape of the end portion 255 is a sharp shape in which the plate thickness decreases as it approaches the tip. The first tilling claw 25b is provided with a through hole 253 that passes through the thickness direction of the first tilling claw 25b and is attached to the claw flange 25c. The first tilling claw 25b is attached to the claw flange 25c through the through hole 253.

  As shown in FIGS. 7B and 7D, the shape of the first tillage claw 25b is such that the tip portion 252-1 extends from the plate-like root portion 252-2 to the first direction D1 via the bent portion 251. It has a protruding shape. In other words, the root portion 252-2 has the first surface 257 and the second surface 259 opposite to each other in the first direction D1, and the distal end portion 252-1 on the second surface 259 side. Protrudes from the root portion 252-2 in the first direction D1 through the bent portion 251. The tip portion 252-1 may be referred to as a protruding portion that protrudes in the first direction D1 with respect to the root portion 252-2. As shown in FIG. 7, the first surface 257 of the root portion 252-2 is linear from the region where the through hole 253 is provided to the region closest to the end portion 255 of the bent portion 251. That is, the root portion 252-2 does not protrude in the direction opposite to the first direction D1 from the first surface 257 in the region where the through hole 253 is provided. In addition, the front-end | tip part 252-1 may protrude in the opposite side of the 1st direction D1 from the root part 252-2.

[Mapping of the first tillage claw 25b and the second tillage claw 26b to the front projection plane]
In order to clarify the difference between the function of the first tilling claw 25b and the function of the second tilling claw 26b, the mapping of each tilling claw to the front projection surface in the state where each tilling claw is lowered to the lowest This will be described with reference to FIG. FIG. 8 shows the mapping of the first tillage nail and the second tillage nail onto the front projection surface in the state where the first tillage nail and the second tillage nail of the agricultural working machine according to the embodiment of the present invention are at the lowest position. FIG. As shown in FIG. 8, the first area 25e of the mapping of the first tillage claw 25b to the front projection surface in the state where the first tillage claw 25b descends the lowest in the range of the rotation locus 250 is the rotation locus 260. Within the range, the second tillage claw 26b is larger than the second area 26e of the mapping of the second tillage claw 26b onto the front projection surface in the state where the second tillage claw 26b descends to the lowest.

  Since the first area 25e is larger than the second area 26e, the first tilling claw 25b has a greater force to receive an action from the soil than the second tilling claw 26b. For this reason, the 1st tilling nail | claw 25b can obtain rotational power efficiently from soil. On the other hand, since the second tilling claw 26b receives less force from the soil than the first tilling claw 25b, the second tilling claw 26b efficiently suppresses the decrease in rotational power obtained by the first tilling claw 25b. Soil can be cultivated. In particular, since the area near the tip of the first tillage claw 25b is large, the removal efficiency of the soil adhering to the second claw shaft 26a by the first tillage claw 25b is high.

[Configuration of Subsoiler 27 and First Working Rotor 25]
As shown in FIGS. 4 and 9, a fixing member 28 is fixed to the first support frame 21. The fixing member 28 is fixed by a fastener such as a screw. The fixing member 28 can be slid in the longitudinal direction of the first support frame 21 by loosening the fastener. The positional relationship between the subsoiler 27 and the first work rotor 25 can be adjusted by this slide. As shown in FIG. 9, the fixing member 28 is provided with through holes 281 and 283 that penetrate the thickness direction of the fixing member 28. These through holes 281 and 283 are used to fix the height position of the subsoiler 27, respectively.

  The subsoiler 27 is inserted and fixed in the hollow portion of the fixing member 28. As shown in FIG. 9, the subsoiler 27 includes a first arm portion 271, a second arm portion 273, a chisel 275, and a handle 277. As shown in FIG. 4, the first arm portion 271 and the second arm portion 273 of the subsoiler 27 exist in the rotation locus 250 of the first work rotor 25 in a side view.

  The first arm portion 271 is a linear plate member. The main surface of the 1st arm part 271 is a surface which spreads in the advancing direction and the up-down direction of the agricultural machine 100. In other words, the main surface of the first arm portion 271 faces the first direction D1 in which the rotation shaft (first claw shaft 25a) of the first work rotor 25 extends. As shown in FIG. 4, the first arm portion 271 is provided with a plurality of through holes 279 that penetrate the plate thickness direction of the first arm portion 271. The first arm portion 271 is inserted into the hollow portion of the fixing member 28, and the through hole 281 or 283 and the through hole 279 are aligned. In this state, a fixing tool such as a pin is inserted into these through holes, whereby the height position of the subsoiler 27 with respect to the fixing member 28 is determined. The lower through hole 283 (the lowest through hole when a plurality of through holes are provided in the fixing member 28) and the upper through hole 279-1 among the plurality of through holes 279 are aligned. The state where the subsoiler 27 is lowered most downward. The upper through-hole 281 (the uppermost through-hole when a plurality of through-holes are provided in the fixing member 28) and the lowermost through-hole 279-5 among the plurality of through-holes 279 are aligned. The state is a state where the subsoiler 27 is raised most upward. The first arm portion 271 extends linearly from the position fixed by the fixing member 28 toward the inside of the rotation locus 250 of the first working rotor 25 in a side view.

  In the present embodiment, the configuration in which the first arm portion 271 is a straight plate-like member has been exemplified, but the first arm portion 271 may extend from the portion fixed by the fixing member 28 toward the rotation locus 250. For example, the first arm portion 271 may extend toward the rotation locus 250 while being curved. Further, the first arm portion 271 is not limited to a plate shape, and may be a column shape.

  The second arm portion 273 is a curved plate member. The second arm portion 273 is curved so as to extend downward and forward. The main surface of the 2nd arm part 273 is a surface which spreads in the advancing direction and the up-down direction of the agricultural machine 100. In other words, the main surface of the second arm portion 273 faces the first direction D1 in which the rotation shaft (first claw shaft 25a) of the first work rotor 25 extends. The second arm portion 273 is connected to the first arm portion 271 at the connection portion 272. In the side view, the connecting portion 272 is inside the rotation locus 250. The second arm part 273 extends from the connection part 272 downward and forward to the outside of the rotation locus 250 in a side view. In other words, the subsoiler 27 protrudes from the inside of the rotation locus 250 of the first work rotor 25 to the outside.

  The chisel 275 is connected to the second arm portion 273 at the connection portion 274. Specifically, the chisel 275 is provided at the end of the subsoiler 27 on the side away from the first support frame 21. The chisel 275 has an inclined surface in which the front of the chisel 275 is inclined downward. As the inclined surface of the chisel 275 moves away from the second arm portion 273, the width of the inclined surface in the first direction D1 decreases. Note that the chisel 275 is outside the rotation locus 250 in a side view.

  The handle 277 is provided at the upper end of the first arm portion 271. The shape of the handle 277 is a shape in which an operator can easily hold the handle 277. In the example of the present embodiment, the handle 277 has a U-shaped cylindrical shape. However, the shape of the handle 277 is not limited to the U-shaped columnar shape, and may take various shapes.

  FIG. 10 is an enlarged view of the subsoiler and the front work rotor of the agricultural machine according to the embodiment of the present invention as seen from the front. In FIG. 10, only the first working rotor 25 (first tilling claw rotating body 25 d), the subsoiler 27, the fixing member 28, and the first support frame 21 are shown for convenience of explanation. The configuration of the first tillage claw rotating body 25d adjacent to the subsoiler 27 and the first direction D1 of the subsoiler 27 will be described with reference to FIG.

  In the first tillage claw 25b of the first tillage claw rotating body 25d, the first surface 257 of the first surface 257 and the second surface 259 of the root portion 252-2 is a surface closer to the sub soiler 27. Referring to FIGS. 9 and 10, the first surface 257 and the second surface 259 of the base portion 252-2 are in the same direction as the first arm portion 271 and the second arm portion 273 of the subsoiler 27, and the traveling direction of the agricultural machine 100 is the same. And a surface extending in the vertical direction. In other words, the first surface 257 and the second surface 259 face the first direction D1. In other words, the first surface 257 and the second surface 259 are parallel to the main surface of the first arm portion 271 and the main surface of the second arm portion 273. Accordingly, the first surface 257 faces the main surface of the first arm portion 271 and the main surface of the second arm portion 273.

  As shown in FIGS. 9 and 10, the first tillage claw 25b is attached to the claw flange 25c with the second surface 259 of the first tillage claw 25b being closer to the claw flange 25c than the first surface 257 is. . In other words, the second surface 259 faces the claw flange 25c. Since the tip portion 252-1 of the first tillage claw 25b protrudes from the root portion 252-2 in the first direction D1, the root portion 252-2 is attached as described above so that the root portion 252-2 is the first arm portion 271 of the subsoiler 27. And it can approach the 2nd arm part 273.

  When the farm work machine 100 travels and the first tillage claw 25b receives an action from the soil, the soil that is about to escape in the direction opposite to the first direction D1 is blocked by the root portion 252-2. That is, when the 1st tillage nail | claw 25b receives the effect | action from soil, it can suppress that soil escapes from the front-end | tip part 252-1. As a result, the force of action received from the soil by the first tilling claw 25b can be efficiently converted into the rotational power of the first tilling claw rotating body 25d.

  In FIG. 10, the offset portion OS is provided between the chisel 275 and the first tilling claw 25b in the first direction D1, but the configuration is not limited thereto. As shown in FIG. 4, if the chisel 275 is outside the rotation locus 250, the first tillage claw 25 b and the chisel 275 may overlap with each other when viewed from the front in FIG. 10.

  As described above, according to the agricultural machine 100 according to the present embodiment, the rotation trajectory 250 of the first tilling claw 25b that generates rotational power and the rotation trajectory 260 of the second tilling claw 26b for efficiently cultivating are side surfaces. Since it overlaps in view, the soil-crushing effect by both tillage claws improves. Specifically, since the end portion 255 of the first tilling claw 25b can approach the second claw shaft 26a, the soil and grass attached to the second claw shaft 26a are removed by the cultivation of the second tilling claw 26b. Can do. Moreover, since the distance of the 1st working rotor 25 and the 2nd working rotor 26 can be shortened, the full length of the agricultural working machine 100 can be shortened.

  When the shape of the second tillage claw 26b of the agricultural machine 100 is a shape suitable for tillage, the second tillage nail springs up a lot of soil and grass by the action with the soil. As a result, a lot of soil and grass adhere to the second claw shaft 26a. The distance L1 between the first tillage claw 25b and the second claw shaft 26a is shorter than the distance L2 between the second tillage claw 26b and the first claw shaft 25a, so that the soil and grass of the second claw shaft 26a can be efficiently obtained. Can be removed.

  Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

10: Mounting part, 11: Top mast, 12a: Lower link, 13a: Support member, 14a: Connecting member, 20: Tillage working part, 21: First support frame, 22: Second support frame, 23a, 23b: Side Plate, 24: shield cover, 25: first working rotor, 25a: first claw shaft, 25b: first tilling claw, 25c: claw flange, 25d: first tilling claw rotating body, 25e: first area, 26: Second working rotor, 26a: second claw shaft, 26b: second tilling claw, 26c: claw flange, 26d: second tilling claw rotating body, 26e: second area, 27: subsoiler, 28: fixing member, 29a: Restriction member, 30: pressure reduction working part, 31: first cage roller, 31a, 32a: support member, 31b, 32b : Flat bar, 32: Second cage roller, 33a: First support arm, 34a: Second support arm, 40: Speed increasing mechanism, 40a: Cover member, 100: Farm work machine, 250: Rotating locus, 251: Bending part, 252-1: tip portion, 252-2: root portion, 253: through-hole, 255: end portion, 256: region, 257: first surface, 258: end portion, 259: second surface, 260: rotation locus, 261: linear portion, 263: curved portion, 268: end, 271: first arm portion, 272, 274: connection portion, 273: second arm portion, 275: chisel, 277: handle, 279, 281, 283 : Through hole

Claims (5)

A plurality of first tilling claws, and a first rotor that generates rotational power when soil acts on the first tilling claws;
A second rotor provided with a plurality of second tilling claws having a shape different from that of the first tilling claw, and rotated by rotational power generated in the first rotor;
Have
The agricultural work machine in which the first rotation locus of the first rotor and the second rotation locus of the second rotor are superimposed in a side view.   2. The agricultural machine according to claim 1, wherein a width of the first tillage claw in a rotation axis direction of the first rotor is smaller than a width of the second tillage claw in a rotation axis direction of the second rotor.   The area of the mapping of the first tillage nail onto the front projection surface when the tip of the first tillage nail is at the lowest position is the front projection when the tip of the second tillage nail is at the lowest position. The farm working machine according to claim 2, wherein the area is larger than an area of the mapping of the second tillage nail onto a surface. The first tillage nail is
A plate-like first part having a first end closest to the rotation axis of the second tillage claw;
A plate-like second part closer to the rotation axis of the first tillage claw than the first part;
A bent part between the first part and the second part,
The second tillage nail is
A plate-like third part;
The agricultural working machine according to claim 3, further comprising: a bending portion that curves from the third portion toward the rotation axis of the first tillage claw and has a second end closest to the rotation axis of the first tillage claw. .   5. The agricultural working machine according to claim 4, wherein the first end portion reaches the third portion beyond the curved portion in a side view.

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