JP2010246469A - Agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural implement to prevent depression of only a wheel track with time. <P>SOLUTION: The agricultural implement 1 is provided with a machine body 5 to be connected to a tractor 2. The machine body 5 is provided with a rotary shaft 20 in a rotatable manner. A tilling tine 23 is attached to a tine holder 22 of the rotary shaft 20. Spiral tines 24a, 24b, 24c, 24d are attached to the tine holder 22 of the rotary shaft 20. The position of each spiral tine 24a, 24b, 24c, 24d is adjustable in lateral direction relative to the rotary shaft 20 according to the position of a wheel 3 of the tractor 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an agricultural machine that can prevent only a wheel passage trace portion from being recessed over time.

  DESCRIPTION OF RELATED ART Conventionally, the agricultural working machine described in the following patent document 1, for example is known.

  This conventional agricultural machine is attached to each nail holder, a machine body connected to the rear part of a tractor which is a traveling vehicle, a rotary shaft provided rotatably on the machine body, a plurality of claw holders provided on the rotary shaft, and Cultivated claws.

JP 2003-304710 A

  However, in the conventional agricultural machine described above, the wheel passage trace portion (轍) through which the wheel of the tractor has passed increases the soil volume as a result of the soil being pushed sideways by the wheel, resulting in less soil volume than the other portions. There is a problem that only the wheel passage trace portion is recessed with time.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent only a wheel passage trace part being dented with progress of time.

  The agricultural machine according to claim 1 is a machine body connected to a traveling vehicle, a rotary shaft body rotatably attached to the machine body, a plurality of tilling claws attached to the rotary shaft body, and the rotary shaft body. And a spiral claw for returning the soil raised by the passage of the wheel of the traveling vehicle to the wheel passage trace portion.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the spiral claw can be adjusted in a lateral direction with respect to the rotating shaft body according to a position of a wheel of the traveling vehicle. .

  The agricultural machine according to claim 3 is the agricultural machine according to claim 1 or 2, wherein the rotating shaft body has a rotating shaft and a plurality of claw holders projecting from the outer peripheral surface of the rotating shaft, The spiral claw is attached to each of the plurality of claw holders, and the spiral claw is attached to a claw holder located near the rear of the wheel of the traveling vehicle among the plurality of claw holders.

  The agricultural machine according to claim 4 is the agricultural machine according to claim 3, wherein the spiral claw is a claw selected according to the position of the wheel from a plurality of claw holders located near the rear of the wheel of the traveling vehicle. It is detachably attached to the holder.

  The agricultural machine according to claim 5 is the agricultural machine according to claim 4, wherein the spiral claw has one end mounting portion at one end in the spiral direction and another end mounting portion at the other end in the spiral direction. An attachment portion is detachably attached to one claw holder selected from among the plurality of claw holder bodies according to the position of the wheel, and the other end attachment portion is a wheel from among the plurality of claw holder bodies. It is detachably attached to another claw holder selected according to the position.

  The agricultural machine according to claim 6 is the agricultural machine according to any one of claims 3 to 5, wherein the nail holder has a first hole and a second hole, and the tilling nail has a first mounting hole and a first hole. 2 has a mounting hole, the spiral claw has a mounting hole, and the first bolt is inserted into the first hole of the claw holder, the first mounting hole of the tilling claw, and the mounting hole of the spiral claw. The first nut is screwed into the first bolt, the second bolt is inserted into the second hole of the claw holder and the second mounting hole of the tilling claw, and the second nut is screwed into the second bolt. It is what has been combined.

  A farm machine according to claim 7 is the farm machine according to any one of claims 3 to 6, wherein the farm machine is attached to a claw holder located near the end of the rotating shaft and guides the soil inward. Is provided.

  According to the first aspect of the present invention, since the spiral claw for returning the soil raised by the passage of the wheel of the traveling vehicle to the wheel passage trace portion is provided, the soil amount of the wheel passage trace portion is reduced as compared with other portions. There is nothing, and it can be prevented that only the wheel passing trace portion is recessed with time.

  According to the invention which concerns on Claim 2, since the position of a spiral claw can be adjusted in the left-right direction with respect to a rotating shaft body according to the position of the wheel of a traveling vehicle, it is suitable for various traveling vehicles with different sizes. It can correspond to.

  According to the invention of claim 3, the soil raised by the passage of the wheel of the traveling vehicle is appropriately returned to the wheel passage trace portion by the spiral claw attached to the claw holder located near the rear of the wheel of the traveling vehicle. be able to.

  According to the invention of claim 4, the spiral claw is detachably attached to the claw holder selected from the plurality of claw holders located near the rear of the wheel of the traveling vehicle according to the position of the wheel. By changing the nail holder to which the spiral nail is attached, the position of the spiral nail can be easily adjusted.

  According to the invention which concerns on Claim 5, a spiral claw can be attached appropriately by attaching the one end attachment part of a spiral claw to one claw holder, and attaching the other end attachment part of a spiral claw to another claw holder. .

  According to the invention of claim 6, the first bolt is inserted into the first hole of the claw holder, the first mounting hole of the tilling claw, and the mounting hole of the spiral claw, and the first nut is screwed into the first bolt. By inserting the second bolt into the second hole of the nail holder and the second mounting hole of the tilling nail and screwing the second nut into the second bolt, the tilling nail and the spiral are engaged with the nail holder. The nail can be properly attached.

  According to the seventh aspect of the present invention, the soil raised by the passage of the wheel of the traveling vehicle is appropriately returned to the wheel passage trace portion by the spiral claw attached to the claw holder located near the rear of the wheel of the traveling vehicle. In addition, it is possible to appropriately prevent the soil from escaping to the outside by guiding the soil inward with a spiral claw attached to the claw holder located near the end of the rotating shaft.

It is the schematic of the agricultural machine based on the 1st Embodiment of this invention. It is the schematic of the agricultural machine after adjusting the position of a spiral nail according to a tractor. It is the schematic of the agricultural working machine which shows the spiral nail | claw of right-and-left both ends. It is a partial cross section figure which shows the power transmission means of an agricultural working machine same as the above. It is a perspective view which shows the helical nail | claw of an agricultural working machine same as the above. It is a partial rear view of an agricultural working machine same as the above. It is a partial rear view of the agricultural machine after adjusting the position of the spiral claw. It is a figure which shows the wheel passage trace part and embankment formed by passage of the wheel of a traveling vehicle. It is a principal part side view of the agricultural working machine which concerns on the 2nd Embodiment of this invention. It is a principal part front view of an agricultural working machine same as the above. It is a side view of the tilling nail of a farm working machine same as the above. It is a principal part side view of the agricultural machine based on the 3rd Embodiment of this invention. It is a principal part front view of an agricultural working machine same as the above. It is a principal part side view of the agricultural working machine which concerns on the 4th Embodiment of this invention. It is a principal part front view of an agricultural working machine same as the above. It is the schematic of the agricultural machine concerning the 5th Embodiment of this invention. It is the schematic of the agricultural machine concerning the 6th Embodiment of this invention.

  A first embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.

  1 to 4, reference numeral 1 denotes a farm working machine, and this farm working machine 1 is a substitute working machine that is used by being connected to the rear portion of a tractor 2 that is a traveling vehicle that runs on a farm field. The farm work machine 1 is connected to the rear part of the tractor 2, and moves forward through the field of the paddy field and the like by the forward traveling of the tractor 2 (in the direction of the arrow in the figure), and it is a farming work (cultivation leveling work). do.

  The tractor 2 includes a tractor body (not shown), and the tractor body is provided with four wheels (tires) 3 in front, rear, left and right. Further, although not shown, the tractor body is provided with a three-point link portion (work implement lifting support device), a PTO shaft, and the like.

  The farm work machine 1 includes a machine body 5 connected to a three-point link part at the rear part of the tractor 2. The fuselage 5 has a shaft holding portion 7 such as a transmission case that rotatably supports the input shaft 6, and the input shaft 6 is connected to the PTO shaft of the tractor 2 through power transmission means (not shown) such as a joint. Is done.

  The shaft holding portion 7 is provided at the center in the left-right direction of the frame pipe portion 8 which is a frame portion that is longitudinal in the left-right direction. A chain case portion 9 that is a transmission case portion is provided at the left end portion that is one end portion of the frame pipe portion 8, and a bracket portion 10 that is a support plate portion is provided at the right end portion that is the other end portion of the frame pipe portion 8. It has been.

  Then, between the left and right chain case parts 9 and the bracket part 10 facing each other, the power is transmitted from the power transmission means 12 connected to the input shaft 6, and the tilling work is performed while rotating in a predetermined direction, for example, the down cut direction. A cultivating body 11 which is a cultivating means for rotating is provided rotatably.

  The power transmission means 12 includes, for example, a gear 14 in the shaft holding portion 7, a shaft 15 in the frame pipe portion 8, a sprocket 16 and a chain 17 in the chain case portion 9 (see FIG. 4). .

  The cultivating body 11 has a left and right longitudinal rotating shaft 21 that is rotatably attached to the machine body 5 and rotates by power from the power transmission means 12. The left end which is one end of the rotating shaft 21 is rotatably supported by the lower portion of the chain case portion 9, and the right end which is the other end of the rotating shaft 21 is rotatably supported by the lower portion of the bracket portion 10. A sprocket 16 is fixed to a portion of the rotary shaft 21 located in the chain case portion 9.

  A plurality of claw holders 22 having the same shape are fixedly projected on the outer peripheral surface of the rotating shaft 21. The plurality of claw holders 22 are provided on the outer peripheral surface of the rotating shaft 21 so as to be arranged along the spiral direction at intervals. Of the plurality of claw holders 22 provided on the rotating shaft 21, at least the plurality of claw holders 22 positioned near the rear of the wheel 3 of the tractor 2 are regularly arranged at equal intervals. The rotating shaft 21 and the claw holder 22 constitute a rotating shaft body (cultivating shaft with claw holder) 20.

  Further, a substantially L-shaped tilling claw (front claw) 23 that is attached to the plurality of claw holders 22 provided on the rotating shaft 21 and that rotates with the rotating shaft 21 while being cultivated is detachably attached. It has been. That is, tilling claws 23 are attached to all the claw holders 22, respectively.

  Of the plurality of claw holders (all claw holders) 22 provided on the rotating shaft 21, claw holders (some claw holders) 22 located near the rear of the left and right wheels 3 of the tractor 2 include wheels. The spiral claw 24a in the form of a spiral plate that guides the soil (the embankment b shown in FIG. 8) raised to the farm scene by passing 3 toward the concave wheel passage trace portion (轍) a and returns to the wheel passage trace portion a. , 24b, 24c, 24d are detachably attached. That is, the spiral claws 24a, 24b, 24c, and 24d are selected according to the position of the wheel 3 (distance between the left and right wheels 3) from among the plurality of claw holders 22 located near the rear of the wheel 3 of the tractor 2. The claw holder 22 is detachably attached.

  As shown in FIG. 1 and FIG. 2, two spiral claws 24a and 24b are attached to the claw holder 22 located near the rear of the wheel 3 on the left side in the traveling direction, and these left and right pairs of spiral claws 24a and 24b The left and right soils raised by the passage of the left wheel 3 are returned to the wheel passage trace portion a. Further, two spiral claws 24c, 24d are attached to the claw holder 22 located near the rear of the right wheel 3 in the traveling direction, and the pair of left and right spiral claws 24c, 24d are raised by the passage of the right wheel 3. The left and right soils are returned to the wheel passage trace portion a.

  The distance A1 between the left and right wheels 3 of the tractor 2 shown in FIG. 1 is longer than the distance A2 between the left and right wheels 3 of the tractor 2 shown in FIG. 2, and the spiral claws 24a, 24b, 24c, The position 24d can be adjusted in the left-right direction with respect to the rotary shaft 20 in accordance with the positions of the wheels 3 of the various tractors 2 having different sizes. That is, the claw holder 22 to which the spiral claws 24a, 24b, 24c, 24d are attached can be changed according to the position of the wheel 3.

  Further, among the plurality of claw holders (all claw holders) 22 provided on the rotary shaft 21, the claw holders (some claw holders) 22 located near both left and right end portions of the rotary shaft 21 have soil outside. The spiral claws 24e and 24f, which guide the soil toward the inner side so as to suppress the escape to the inner side, are detachably attached.

  As shown in FIG. 3, one spiral claw 24e is attached to the claw holder 22 located in the vicinity of the left end of the rotating shaft 21, and the soil is guided toward the right inner side by the spiral claw 24e. Further, one spiral claw 24f is attached to the claw holder 22 located near the right end of the rotating shaft 21, and the soil is guided toward the left inner side by the spiral claw 24f.

  Here, each of the spiral claws 24a, 24c, 24e has the same shape, and has a spiral plate shape having a substantially semicircular arc shape when viewed from the axial direction of the rotating shaft 21, as shown in FIG. The spiral claws 24a, 24c, and 24e have a plate-like one end attaching portion 26 at one end in the spiral direction and a plate-like other end attaching portion 27 at the other end in the spiral direction. That is, the spiral claws 24a, 24c, and 24e have a spiral plate portion 25, and one end mounting portion 26 is integrally provided at one end portion of the spiral plate portion 25, and the other end portion of the spiral plate portion 25 is connected to the other end. A mounting portion 27 is provided integrally.

  The spiral claws 24b, 24d, and 24f are opposite to the spiral claws 24a, 24c, and 24e, and, like the spiral claws 24a, 24c, and 24e, the spiral plate portion 25 and the one end mounting portion 26 And the other end mounting portion 27. That is, the spiral claws 24a, 24c, and 24e guide the soil to the right side (one side) while rotating with the rotation shaft 21, and the spiral claws 24b, 24d, and 24f rotate with the rotation shaft 21 and move the soil to the left side. To the other side (the other side opposite to one side). An attachment hole 28 is formed in the one end attachment portion 26 and the other end attachment portion 27.

  The one end mounting portion 26 of the spiral claws 24a, 24b, 24c, 24d, 24e, 24f is detachably attached to one claw holder 22, and the spiral claws 24a, 24b, 24c, 24d, 24e, 24f The end attaching portion 27 is detachably attached to one other claw holder 22. That is, one spiral claw is attached to the two claw holders 22. As is clear from FIG. 9, the outer diameter r1 of the spiral claws 24a to 24f is smaller than the outer diameter r2 of the tilling claws 23.

  As shown in FIGS. 6 and 7, the claw holder 22 has a substantially cylindrical holder main body 31. The tilling claw 23 and the spiral claws 24a to 24f are attached to the holder main body 31 of the desired claw holder 22 by being fastened together with bolts 32 and nuts 33 constituting the attaching means.

  The holder main body 31 has opposed plates 34 that are spaced apart from each other, and a base end portion of the tillage claw 23 is fitted between the opposed plates 34. Both opposed plates 34 are formed with holes 35, 36. One hole 35 is larger than the other hole 36, and the head 32 a of the bolt 32 is accommodated in the one hole 35. A mounting hole 37 is formed in the base end portion of the tilling claw 23. Then, the bolts 32 are inserted into the holes 35 and 36 of the holder main body 31 that coincide with each other, the mounting holes 37 of the tilling claws 23, and the mounting holes 28 of the spiral claws 24a to 24f, and the nuts 33 are screwed into the bolts 32. The tilling claws 23 and the spiral claws 24 a to 24 f are attached to the holder main body 31 by screwing the nuts 33. The tillage body 11 is composed of a rotary shaft 20, a tilling claw 23, and spiral claws 24a to 24f.

  On the other hand, although not shown, the machine body 5 has a tillage cover portion that covers the upper portion of the tillage body 11, and the rear end portion of the tillage cover portion is turned up and down so as to follow the farm scene behind the tillage body 11. There is provided a leveling body (not shown) that performs leveling work while moving, that is, leveling the farm scene. The leveling body is composed of, for example, a first leveling plate (level plate) and a second leveling plate (rake).

  Next, the operation and the like of the farm work machine 1 will be described.

  When the agricultural machine 1 moves in the traveling direction by the traveling of the tractor 2, the tilling claw 23 rotates in the predetermined direction together with the rotating shaft 21 to perform the tilling work.

  Further, the spiral claws 24a, 24b, 24c, and 24d rotate in a predetermined direction together with the rotating shaft 21, and the soil (banking b shown in FIG. 8) that has risen in the field by passing through the wheels 3 becomes a concave wheel passage trace portion a. As a result, there is no dent in the wheel passage trace portion a formed in the field scene.

  Further, the spiral claws 24e and 24f rotate in a predetermined direction together with the rotary shaft 21 to guide the soil inward, and as a result, the soil is prevented from escaping outward from the left and right ends of the machine body 5.

  And according to such an agricultural machine 1, the four spiral claws 24a, 24b, 24c, and 24d for returning the soil that has risen on the farm scene due to the passage of the wheel 3 of the tractor 2 to the wheel passage trace portion a that is a recess are provided. Since the amount of soil in the wheel passage trace portion a does not decrease compared to other portions, the amount of soil in the field scene becomes uniform, so that only the wheel passage trace portion a has a ratio of soil to water. Therefore, it is possible to prevent the soil from sinking with the passage of time due to the sedimentation of the soil, to improve the leveling, and to improve the finish leveling.

  Further, since the helical claws 24a, 24b, 24c, and 24d can be adjusted in the horizontal direction with respect to the rotary shaft body 20 according to the position of the wheel 3 of the tractor 2 by selecting and changing the claw holder 22 to be attached. Applicable to various tractors with different sizes.

  Further, the soil raised by the passage of the wheel 3 of the tractor 2 by the spiral claws 24a, 24b, 24c, 24d attached to the claw holder 22 located near the rear of the wheel 3 of the tractor 2 is appropriately applied to the wheel passage trace portion a. And the soil is guided from the end of the fuselage 5 by guiding the soil inward by the spiral claws 24e and 24f attached to the claw holders 22 located near the left and right ends of the rotating shaft 21. Escape to the outside can be appropriately suppressed, so that the leveling can be further improved and the finishing level can be further increased.

  In the first embodiment, a configuration in which the tilling claw 23 and the spiral claws 24a to 24f are detachably attached to the holder main body 31 of the claw holder 22 by the bolt 32 and the nut 33 is described. However, as shown in FIGS. 9 and 10, for example, the first bolt 51 and the first nut 52 constituting the first attachment means, and the second bolt 53 and the second nut 54 constituting the second attachment means, A configuration in which the tilling claw 23 and the spiral claws 24a to 24f are detachably attached to the holder main body 31 of the claw holder 22 may be adopted.

  First and second holes (through holes) 41 and 42 and second holes (through holes) 43 and 44 are formed through the counter plate 34 of the holder main body 31 shown in FIGS. One second hole 44 is larger than the other second hole 43, and the entire head 53 a of the second bolt 53 is accommodated in the one second hole 44. As shown in FIG. 11, a first attachment hole 46 and a second attachment hole 47 are formed at the base end portion of the tilling claw 23. The first mounting hole 46 is positioned closer to the proximal end of the tilling claw 23 than the second mounting hole 47.

  Then, the first bolts 51 are inserted into the first holes 41 and 42 of the holder main body 31 that coincide with each other, the first mounting holes 46 of the tilling claws 23 and the mounting holes 28 of the spiral claws 24a to 24f. A first nut 52 is screwed to the bolt 51, and the tilling claw 23 and the spiral claws 24 a to 24 f are attached to the holder main body 31 by the screwing of the first nut 52. A second bolt 53 is inserted into the second holes 43 and 44 of the holder main body 31 and the second mounting hole 47 of the tilling claw 23, and the second nut 54 is screwed to the second bolt 53. The tillage claw 23 is attached to the holder main body 31 by screwing the second nut 54.

  In this way, the tilling claw 23 is fixedly attached to the holder main body 31 of the claw holder 22 at two locations by the first bolt 51 and the second bolt 53, etc. The claw 23 can be stably fixed to the claw holder 22, and the load applied to the first bolt 51, the second bolt 53, etc. can be reduced, and the durability can be improved.

  For example, as shown in FIGS. 12 and 13, a plate-like spiral claw attachment 61 is integrally provided on the holder main body 31 of the claw holder 22, and the spiral claw attachment 61 of the claw holder 22 is spirally provided. A configuration in which the claws 24a to 24f are detachably attached by bolts 62 and nuts 63 constituting attachment means may be employed.

  Further, for example, as shown in FIGS. 14 and 15, a spiral claw mounting plate 71, which is a spiral claw mounting part separate from the claw holder 22, protrudes from the outer peripheral surface of the rotating shaft 21. The structure may be such that the spiral claws 24a to 24f are detachably attached to the attachment plate 71 by means of bolts 72 and nuts 73 constituting attachment means.

  Further, for example, the present invention can also be applied to a three-fold foldable agricultural working machine 1 as shown in FIGS.

  The agricultural working machine 1 shown in FIG. 16 includes a central working unit 76 and extension working units 77 that are provided at both left and right ends of the central working unit 76 so as to be rotatable about a shaft 78. Spiral claws 24 a, 24 b, 24 c, 24 d are attached to the left and right ends of the shaft body 20, and spiral claws 24 e, 24 f are attached to the outer end side of the rotating shaft body 20 of the extension working unit 77.

  The agricultural working machine 1 shown in FIG. 17 includes a central working unit 76 and extended working units 77 that are rotatably provided at both left and right ends of the central working unit 76, and the left and right of the rotary shaft 20 of the central working unit 76. Spiral claws 24b and 24c are attached to both end sides, spiral claws 24a and 24d are attached to the inner end side of the rotating shaft body 20 of the extension working portion 77, and spiraled to the outer end side of the rotating shaft body 20 of the extension working portion 77. The claws 24e and 24f are attached.

  On the other hand, the agricultural machine 1 is not limited to a configuration including six spiral claws 24a, 24b, 24c, 24d, 24e, and 24f. For example, a configuration including only four spiral claws 24a, 24b, 24c, and 24d, A configuration including only two spiral claws 24a and 24d may be used.

  Further, for example, all the claw holders 22 may be regularly arranged at equal intervals on the outer peripheral surface of the rotating shaft 21 so that the spiral claw can be attached to all the claw holders 22.

  Further, the spiral claw is not limited to a spiral shape of approximately 180 degrees, and may be, for example, less than approximately 180.

DESCRIPTION OF SYMBOLS 1 Agricultural work machine 2 Tractor which is a traveling vehicle 3 Wheel 5 Airframe
20 Rotating shaft
21 Rotation axis
22 Claw holder
23 Tillage Claw
24a, 24b, 24c, 24d, 24e, 24f Spiral claw
26 One end mounting
27 Other end mounting
28 Mounting hole
41, 42 1st hole
43,44 2nd hole
46 First mounting hole
47 Second mounting hole
51 1st bolt
52 1st nut
53 Second bolt
54 2nd nut a Wheel trace part

Claims (7)

A fuselage connected to the traveling vehicle;
A rotating shaft body rotatably attached to the airframe,
A plurality of tilling claws attached to the rotating shaft body;
An agricultural work machine comprising: a spiral claw attached to the rotating shaft body and returning soil raised by passing of the wheel of the traveling vehicle to a wheel passing trace portion. The agricultural working machine according to claim 1, wherein the position of the spiral claw can be adjusted in the left-right direction with respect to the rotating shaft body according to the position of the wheel of the traveling vehicle. The rotating shaft body has a rotating shaft and a plurality of claw holders protruding from the outer peripheral surface of the rotating shaft,
A tilling nail is attached to each of the plurality of nail holders,
The agricultural machine according to claim 1 or 2, wherein the spiral claw is attached to a claw holder located near the rear of a wheel of the traveling vehicle among the plurality of claw holders. The spiral claw is detachably attached to a claw holder selected according to the position of the wheel from among a plurality of claw holders located near the rear of the wheel of the traveling vehicle. Farming machine. The spiral claw has one end mounting portion at one end in the spiral direction and the other end mounting portion at the other end in the spiral direction,
The one end attachment portion is detachably attached to one claw holder selected according to the position of a wheel from the plurality of claw holder bodies,
The farm work machine according to claim 4, wherein the other end attachment portion is detachably attached to another claw holder selected from the plurality of claw holder bodies according to the position of a wheel. The claw holder has a first hole and a second hole,
The tilling claw has a first mounting hole and a second mounting hole,
The spiral claw has a mounting hole,
A first bolt is inserted into the first hole of the claw holder, the first mounting hole of the tilling claw, and the mounting hole of the spiral claw, and the first nut is screwed to the first bolt,
The second bolt is inserted into the second hole of the claw holder and the second mounting hole of the tillage claw, and the second nut is screwed to the second bolt. Any one of the agricultural machines described above. The agricultural working machine according to any one of claims 3 to 6, further comprising a spiral claw that is attached to a claw holder located near an end of the rotating shaft and guides the soil inward.

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