Agricultural implement

Abstract

To improve a front-rear gravity center balance between a vehicle body and an agricultural implement.SOLUTION: An agricultural implement includes: a rotary work part having a plurality of tillage hooks that rotate about a first rotational axis for performing a tillage work; a roller part provided on a rear side of the rotary work part and that rotates about a second rotational axis; and a position adjustment mechanism which can adjust a position of the roller part such that a first distance between a first perpendicular line from the first rotational axis to the ground and a second perpendicular line from the second rotational axis to the ground is equal to or less than a second distance between a third perpendicular line from the first rotational axis to the ground and a fourth perpendicular line from the second rotational axis to the ground when a tangent line between a lower end of a rational locus of the tillage hook and a lower end of the roller is horizontal.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an agricultural working machine. In particular, the present invention relates to an agricultural working machine equipped with a tilling working rotor (also referred to as a "rotary working unit") and a compaction working unit behind a traveling body, and tills and compacts the soil in a field while progressing with the forward travel of the traveling body (tractor).

Background Art

[0002] Conventionally, a compaction roller (rolling wheel) has been used as a working member for compacting the soil in a field. The compaction roller has a working member together with a support member. Generally, a columnar shape (sometimes referred to as a working rod) is widely used as the shape of the working member. Patent Document 1 discloses an agricultural working machine equipped with a compaction roller.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, when a compaction roller is attached to an agricultural working machine, a heavy structure exists at a position away from the traveling body. In this case, since the load applied to the rear of the traveling body increases, the front-rear center-of-gravity balance (matching balance) between the agricultural working machine and the traveling body to which the agricultural working machine is attached deteriorates. When the matching balance between the agricultural working machine and the traveling body deteriorates, the operability of the tractor deteriorates, and there is a risk that the traveling body cannot be stably traveled.

[0005] In addition, when a compaction roller is attached to an agricultural working machine, the tilling working rotor cannot be moved to the end of the field, and tilling at the end of the field cannot be performed.

[0006] Furthermore, when attempting to transport the traveling body equipped with the agricultural working machine equipped with the compaction roller using a truck or the like, the compaction roller may protrude rearward from the truck bed, which may impede safe transportation.

[0007] Therefore, one of the objectives of the present invention is to improve the front-rear center of gravity balance between the traveling body and the agricultural working machine. Another objective of the present invention is to provide an agricultural working machine having a compaction roller that can perform tillage work from the edge of the field.

Means for Solving the Problem

[0008] According to an embodiment of the present invention, there is provided an agricultural working machine including: a rotary working part having a plurality of tilling claws that rotate about a first rotation axis to perform tillage work; a roller part provided on the rear side of the rotary working part and rotating about a second rotation axis; and a position adjustment mechanism capable of adjusting the position of the roller part such that a first distance between a first perpendicular line extending from the first rotation axis toward the ground and a second perpendicular line extending from the second rotation axis toward the ground is less than or equal to a second distance between a third perpendicular line extending from the first rotation axis toward the ground and a fourth perpendicular line extending from the second rotation axis toward the ground when a tangent line connecting the lower end of the rotation locus of the tilling claws and the lower end of the roller is horizontal.

[0009] In the above agricultural working machine, the position adjustment mechanism may adjust the position of the roller part such that the lower end of the roller part is located above the upper end of the rotary working part.

[0010] In the above agricultural working machine, the position adjustment mechanism may include an arm part that supports the roller part, and the position of the roller part may be adjusted by rotating the arm part.

[0011] In the above agricultural working machine, the position adjustment mechanism may include an actuator, and the position of the roller part may be adjusted by driving the actuator.

[0012] In the above agricultural working machine, the position adjusting mechanism may include a telescopic screw, and the position of the roller unit may be adjusted by telescoping the screw.

[0013] In the above agricultural working machine, a leveling unit for performing leveling treatment is provided on the rear side of the rotary working unit, and the position adjusting mechanism may adjust the position of the roller unit such that the second rotating shaft is closer to the first perpendicular line than a third perpendicular line extending from the rear end of the leveling unit toward the ground.

[0014] In the above agricultural working machine, a disk may be arranged on the front side of the rotary working unit and rotatably supported.

Advantages of the Invention

[0015] According to an embodiment of the present invention, the front-rear center-of-gravity balance (matching balance) between the tractor and the agricultural working machine can be improved. Further, according to an embodiment of the present invention, an agricultural working machine having a pressing roller and capable of performing tillage work from the end of the field can be provided.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0017] Hereinafter, embodiments of the agricultural working machine of the present invention will be described with reference to the drawings. However, the agricultural working machine of the present invention can be implemented in many different ways and is not to be construed as being limited to the description of the examples shown below. In the drawings referred to in this embodiment, the same parts or parts having the same function are denoted by the same reference numerals, and the repeated description thereof will be omitted.

[0018] Also, for the sake of convenience of explanation, terms indicating directions such as upward (upper side), downward (lower side), forward (front side), rearward (rear side), rightward (right side), and leftward (left side) are used. However, the direction in which gravity acts is downward, and the opposite is upward. Also, the direction in which the traveling body advances is forward, and the opposite is rearward. Further, toward the front, the right side is the rightward direction, and the left side is the leftward direction.

[0019] <First Embodiment> (1-1. Configuration of the agricultural working machine) The configuration of the agricultural working machine 100 according to an embodiment of the present invention will be described. In one embodiment of the present invention, as the agricultural working machine 100, an example is given of a tillage working machine that is mounted on the rear part of a traveling body such as a tractor and is towed by the traveling body to till a field.

[0020] FIG. 1 is a schematic view of the agricultural working machine 100 according to the first embodiment as viewed from above. FIG. 2 is a schematic view of the agricultural working machine 100 according to the first embodiment as viewed from the rear side. FIG. 3 is a schematic view of the agricultural working machine 100 according to the first embodiment as viewed from the left side. Note that FIGS. 1 to 2 show the schematic configuration of the agricultural working machine 100 according to an embodiment of the present invention, and for the sake of convenience of explanation, the illustration of some parts is omitted.

[0021] The agricultural working machine 100 according to an embodiment of the present invention generally includes a mounting portion 10, a tillage working portion 20, and a rolling working portion 30. Hereinafter, each portion will be described in detail.

[0022] (1-1-1. Mounting portion) The mounting portion 10 has a top link pin 11 (top link connecting portion), a pair of lower link connecting portions 12a and 12b, top masts 13a and 13b, and a pair of connecting members 14a and 14b.

[0023] The top masts 13a and 13b are fixed to the first support frame 21 and the second support frame 22 of the tilling work portion 20 and support the top link pin 11. The lower link connecting portions 12a and 12b are fixed to the first support frame 21. The connecting members 14a and 14b connect the top link pin 11 and the lower link connecting portions 12a and 12b and function as reinforcing members (stays).

[0024] The top link pin 11 and the lower link connecting portions 12a and 12b are connected to a three-point link mechanism (not shown) provided at the rear of a traveling body such as a tractor. Since the structure of the three-point link mechanism is well-known, the description thereof is omitted here. By connecting the mounting portion 10 to the three-point link mechanism of the traveling body, the agricultural work machine 100 of one embodiment of the present invention is mounted on the rear of the traveling body.

[0025] (1-1-2. Tilling work portion) The tilling work portion 20 has a first support frame 21, a second support frame 22, a pair of side plates 23a and 23b, a shield cover 24, a tilling work rotor 25 (also referred to as a "rotary work portion"), a soil leveling portion 26, tilling members 27, and fixing members 28.

[0026] The first support frame 21 and the second support frame 22 are arranged to be (substantially) parallel, are connected to the side plates 23a and 23b, and support the side plates 23a and 23b. The first support frame 21 and the second support frame 22 are structural members of the agricultural work machine 100 and have the function of a body frame. Also, as described above, the first support frame 21 and the second support frame 22 support the top link pin 11 via the top masts 13a and 13b. The first support frame 21 further supports the lower link connecting portions 12a and 12b.

[0027] Furthermore, the first support frame 21 supports a plurality of tilling members 27. The plurality of tilling members 27 are each detachably and rotatably supported with respect to the first support frame 21 via a fixing member 28. The tilling member 27 is a member that performs tilling work prior to the work by the tilling work rotor 25 as the traveling body travels. In the present embodiment, a disk is used as the tilling member 27, and the tilling member 27 has a function of tilling the surface soil to make it soft and moving the tilled soil. A plurality of tilling members 27 are arranged at a predetermined interval with respect to the first support frame 21 via the fixing member 28. Note that the fixing member 28 can be attached to any position of the first support frame 21. In addition, although an example is shown in which two tilling members 27 are provided on each of the left and right sides, one tilling member 27 may be provided, or three or more tilling members 27 may be provided. Note that the tilling member 27 is not limited to a disk, and other tilling members may be used. Examples of tilling members other than a disk include a subsoiler that crushes and softens subsoil (also called lower layer soil).

[0028] A tilling work rotor 25 is installed between the side plates 23a and 23b. The shield cover 24 is installed between the side plates 23a and 23b and covers the upper side of the tilling work rotor 25. The shield cover 24 plays a role of preventing the scattering of soil lumps upward during the tilling work of the tilling work rotor 25. Note that the side plates 23a and 23b and the shield cover 24 also have a function as a body frame.

[0029] In addition, restricting members may be attached to the side plates 23a and 23b to restrict the positions of the compaction rollers 310 described later. The restricting member functions as a means for restricting the vertical movement of the first connecting member 331 and the second connecting member 332 that support the compaction roller 310 described later.

[0030] The tilling operation rotor 25 includes a claw shaft 25a and a plurality of tilling claws 25b. The tilling claws 25b are arranged in a plurality around the shaft at a predetermined mounting position on the claw shaft 25a. Also, a plurality of mounting positions of the tilling claws 25b are provided at predetermined intervals in the longitudinal direction of the claw shaft 25a. In FIGS. 3 to 7, the circle 25c indicated by the dotted line is the rotation locus of the tilling claw 25b.

[0031] In one embodiment of the present invention, the tilling claws 25b may be mounted on the claw shaft 25a with a phase shift between adjacent mounting positions. That is, when the tilling operation rotor 25 is viewed from the direction (left - right direction) along the claw shaft 25a, a plurality of adjacent tilling claws 25b at each mounting position are arranged in a spiral shape from one side of the claw shaft 25a toward the other side. Thereby, the resistance during tilling of the tilling operation rotor 25 can be reduced, and a uniform field surface with few irregularities can be obtained. Note that the arrangement of the plurality of tilling claws 25b is not limited to a spiral shape and can be changed as appropriate.

[0032] Also, the claw shafts 25a are rotatably attached to the side plates 23a and 23b via bearings or the like, respectively. The claw shaft 25a can also be referred to as a rotation shaft (also referred to as the "first rotation shaft"). In one embodiment of the present invention, the power from a traveling body such as a tractor is transmitted to the claw shaft 25a through a power transmission shaft (not shown) inserted inside the second support frame 22 and through a chain case. When the claw shaft 25a rotates, the plurality of tilling claws 25b also rotate, and the tilling operation rotor 25 performs a tilling operation.

[0033] The leveling unit 26 (also referred to as an "apron") is provided behind the tilling operation rotor 25. The upper end portion 26a of the leveling unit 26 is rotatably connected to the shield cover 24. The tip portion 26b of the leveling unit 26 contacts the ground at the lowermost end and levels the field surface tilled by the tilling operation rotor 25. Note that the tip portion 26b of the leveling unit 26 does not necessarily contact the ground at the lowermost end, and depending on the tilling claws 25b mounted on the claw shaft 25a, the tip portion 26b of the leveling unit 26 may not contact the ground at the lowermost end.

[0034] (1-1-3. Compaction Working Unit 30) As shown in FIGS. 1 to 3, the compaction working unit 30 (also referred to as the "roller unit") is disposed behind the tillage working unit 20. The compaction working unit 30 includes a compaction roller 310, a first connecting member 331, and a second connecting member 332 (also referred to as the "arm unit").

[0035] The compaction roller 310 (a cage roller in this example) is disposed outside the rotation locus of the leveling unit 26 so as not to interfere with the rotation of the leveling unit 26, although details will be described later. The compaction roller 310 is rotatably supported with respect to the tillage working unit 20 via the first connecting member 331 and the second connecting member 332. One end 331a of the first connecting member 331 is connected to the side plate 23a, and the other end 331b is connected to a first outer support member 312-1 (to be described later) of the compaction roller 310. One end 332a of the second connecting member 332 is connected to the side plate 23b, and the other end 332b is connected to a second outer support member 312-2 (to be described later) of the compaction roller 310. Thereby, the tillage working unit 20 and the compaction roller 310 are connected.

[0036] Furthermore, in one embodiment of the present invention, electric cylinders 35 are respectively installed between the side plate 23a and the first connecting member 331, and between the side plate 23b and the second connecting member 332.

[0037] The compaction roller 310 has a structure in which a plurality of rod-shaped compaction working members 311 are fitted and welded into grooves provided in a plurality of ring-shaped outer support members 312 (a first outer support member 312-1 and a second outer support member 312-2) and a plurality of inner support members 313. The first outer support member 312-1 and the second outer support member 312-2 both have a rotation shaft 315 (also referred to as the "second rotation shaft") inside an opening provided near the center. That is, the compaction roller 310 rotates about the rotation shaft 315.

[0038] The rod-shaped compaction working member 311 has a cylindrical shape (circular shape in side view). In the compaction roller 310, the rod-shaped compaction working member 311 is arranged inclined with respect to the rotation axis 315.

[0039] Also, in the compaction roller 310, one large-diameter rod-shaped compaction working member 311-1 and the large-diameter rod-shaped compaction working member 311-2 arranged adjacent thereto are spaced apart with a gap S in the circumferential direction R, and a small-diameter rod-shaped compaction working member 311-3 is arranged between one large-diameter rod-shaped compaction working member 311-1 and the large-diameter rod-shaped compaction working member 311-2 arranged adjacent thereto. By having a gap between the rod-shaped compaction working members 311, the soil that enters the inside of the compaction roller 310 can be discharged. Note that the width of the gap S is not limited and may be appropriately set according to the diameter of the rod-shaped compaction working member 311, the degree of compaction, the ease of soil discharge, etc.

[0040] Also, the rod-shaped compaction working member 311 is illustrated as having a configuration in which 20 rod-shaped compaction working members 311, including large-diameter and small-diameter ones, are arranged, but the number of rod-shaped compaction working members 311 is not limited to this.

[0041] Also, in the rod-shaped compaction working member 311, the shape in side view is a circle, but it is not limited to this. The shape in side view of the rod-shaped compaction working member 311 may be an arc or a rectangle (plate-shaped). Note that the shapes of all the rod-shaped compaction working members 311 may be the same, or not all of them may have the same shape, and some may have different shapes. Also, not all of the sizes (diameter, etc.) may be the same, and some sizes may be different.

[0042] In one embodiment of the present invention, the first connecting member 331 is connected to the side plate 23a, the pressing roller 310, and the electric cylinder 35. Similarly, the second connecting member 332 is connected to the side plate 23b, the pressing roller 310, and the electric cylinder 35. At this time, using the connection portion CP2 between the first connecting member 331 and the side plate 23a (and the connection portion CP2 between the second connecting member 332 and the side plate 23b) as a rotation fulcrum, the electric cylinder 35, which is an actuator, is driven to rotate the first connecting member 331 and the second connecting member 332, thereby changing the position of the pressing roller 310. Therefore, the configuration including the electric cylinder 35 and the first connecting member 331 (and the second connecting member 332) can be referred to as a "position adjusting mechanism". In this embodiment, an electric cylinder is used as the actuator, but it is not limited thereto, and other telescopic members such as a hydraulic cylinder or an electro-hydraulic cylinder may be used instead of the electric cylinder.

[0043] Although not shown in the drawings, the agricultural working machine 100 according to one embodiment of the present invention is provided with control means for controlling the operation of the electric cylinder 35. The control means is attached to the body frame such as the shield cover 24, the first support frame 21, and the second support frame 22 directly or via a mounting bracket. In one embodiment of the present invention, various control programs and the like are stored in the control means, and the control means performs drive control of the electric cylinder 35 based on user operations such as a remote control or a mobile terminal.

[0044] The control means is configured to be able to communicate wirelessly or by wire with a remote control, a mobile terminal (including smartphones, tablets, personal computers, etc.), etc., and controls the operation of the electric cylinder 35 based on signals from the remote control, the mobile terminal, etc. according to a control program. For example, the control means may control so that the electric cylinder 35 is driven only while the user is pressing an operation button based on signals from the remote control, the mobile terminal, etc. Also, for example, a (specific) operation button may be associated with a predetermined rotation position of the pressing roller 310, and when the control means detects that the user has pressed the operation button, the control means may be configured to drive and control the electric cylinder 35 until the pressing roller 310 reaches the predetermined rotation position.

[0045] Note that instead of the electric cylinder 35, a hydraulic cylinder may be used, and the hydraulic cylinder may be controlled by operating a hydraulic operation lever provided near the driver's seat in the traveling vehicle body to adjust the position of the pressing roller 310.

[0046] Also, in one embodiment of the present invention, as will be described later, when cultivating the end of the field, it is desirable that the lower end of the pressing roller 310 is higher than the upper end of the cultivating work rotor 25. In this embodiment, for example, the connection part CP2 between the first connecting member 331 and the side plate, which is the rotation fulcrum of the pressing roller 310, is provided at a position higher than the connection part CP1 between the cultivating part 26 and the shield cover 24, which is the rotation fulcrum of the leveling part 26, but the positional relationship between the connection part CP2 and the connection part CP1 is not limited to this.

[0047] In the agricultural working machine 100 of one embodiment of the present invention, when moving forward as the traveling body travels, the pressing roller 310 rotates and advances after the cultivating working part 20 has passed. At that time, as will be described later, a plurality of rod-shaped pressing working members 311 are configured to crush and press the soil lumps in the field cultivated by the cultivating working part 20.

[0048] As described above, the agricultural working machine 100 according to an embodiment of the present invention is towed as the traveling body travels, and the tilling member 27 and the tilling working rotor 25 cooperate to till the field. Then, the soil lumps in the field tilled by the tilling member 27 and the tilling working rotor 25 can be crushed and compacted by the action of the compaction roller 310.

[0049] (1-2. Arrangement of the compaction roller) Next, with reference to FIGS. 4 to 7, the possible arrangement configurations of the compaction roller 310 of the agricultural working machine 100 applied in an embodiment of the present invention will be described.

[0050] FIG. 4 is an explanatory diagram (side view) when the compaction roller 310 is positioned at the position P0 in the initial state. As shown in FIG. 4, the position P0 where the lower end of the compaction roller 310 is in contact with the ground Gr is set as the initial state. At this time, the ground Gr is a horizontally provided tangent line connecting the lower end of the rotation locus (circle 25c) of the tilling claw 25b and the lower end of the compaction roller 310. In the initial state, the distance between the perpendicular line SS1 (also referred to as the "third perpendicular line") from the center of the claw shaft 25a (the first rotation shaft) to the ground Gr and the perpendicular line SS2-P0 (also referred to as the "fourth perpendicular line") from the center of the rotation shaft of the compaction roller 310 (the rotation shaft 315 (the second rotation shaft) of the outer support member 312) to the ground Gr is set as the distance KD-P0 (also referred to as the "second distance").

[0051] FIG. 5 is an explanatory view (side view) when the compaction roller 310 is rotated (lifted up) from the position P0 to the position P1. By contracting the electric cylinder 35, the position of the compaction roller 310 is adjusted so as to move from the position P0 to the upper position P1. As shown in FIG. 5, the compaction roller 310 is disposed outside the rotation locus 26c of the leveling unit 26. At this time, a perpendicular line SS2-P1 from the center of the rotation axis (rotation axis 315) of the compaction roller 310 toward the ground Gr overlaps with the perpendicular line SS2-P0 in the initial state. That is, the distance KD-P0 between the perpendicular line SS1 and the perpendicular line SS2 in the initial state (position P0 of the compaction roller 310) is equal to the distance KD-P1 between the perpendicular line SS1 and the perpendicular line SS2-P1 at the position P1 of the compaction roller 310. Therefore, even if the compaction roller 310 is rotated from the position P0 to the position P1, the front-rear center-of-gravity balance (matching balance) between the tractor and the agricultural machine 100 does not change, so the operability of the tractor remains the same as in the initial state.

[0052] On the other hand, in one embodiment of the present invention, a connection portion CP2 between the first connecting member 331 and the side plate 23a, which serves as a rotation fulcrum of the compaction roller 310, is disposed at a position higher than the rotation fulcrum of the leveling unit 26. In this case, at the position P1, the height H310b from the ground Gr to the lower end of the compaction roller 310 can be made larger than the height H25t from the ground Gr to the upper end of the tilling work rotor 25. Similarly, the lower end of the compaction roller 310 at the position P1 can be located above the lower end of the leveling unit 26 (furthermore, the upper end of the tilling member 27) when the leveling unit 26 is rotated to the uppermost end. Thereby, the tilling work rotor 25 can be disposed at the end of the field without the compaction roller 310 contacting (interfering with) the field wall surface (such as a ridge). Therefore, even in an agricultural machine in which a compaction work unit (compaction roller 310) is provided behind the tilling work unit (tilling work rotor 25), if the compaction roller 310 is rotated (lifted up) at least to the position P1, tilling work can be performed up to the end of the field without deteriorating the front-rear center-of-gravity balance (matching balance) between the tractor and the agricultural machine 100.

[0053] Next, with reference to FIG. 6, the case where the compaction roller 310 has moved to position P2 will be described. FIG. 6 is an explanatory diagram (side view) when the compaction roller 310 is rotated (jumped up) to position P2. Position P2 is the position where the tip 26b of the leveling unit 26 is arranged at the rearmost end when the leveling unit 26 is rotated upward with respect to the shield cover 24 (the perpendicular line SS3 from the tip 26b toward the ground Gr), and is the position where the rearmost end of the compaction roller 310 coincides. At this time, the rotation axis 315 of the compaction roller 310 (the perpendicular line SS2-P2 from the center of the rotation axis 315 toward the ground Gr) is at a position (arbitrary) in front of the perpendicular line SS3.

[0054] FIG. 6 shows the case where the compaction roller 310 is at position P2 and the rearmost end of the rotation locus of the compaction roller 310 coincides with the perpendicular line SS3. When the compaction roller 310 is at position P2, the perpendicular line SS2-P2 from the center of the rotation axis (rotation axis 315) of the compaction roller 310 toward the ground Gr approaches the perpendicular line SS1 more than the perpendicular line SS2-P0 in the initial state. That is, the distance KD-P2 (the "first distance") between the perpendicular line SS1 (also referred to as the "first perpendicular line") and the perpendicular line SS2-P2 (also referred to as the "second perpendicular line") at position P2 of the compaction roller 310 is smaller than the distance KD-P0 (the "second distance") between the perpendicular line SS1 (the third perpendicular line) and the perpendicular line SS2-P0 (the fourth perpendicular line) in the initial state (position P0 of the compaction roller 310). Therefore, the compaction roller 310 is positioned more forward than in the initial state, and the front-rear center of gravity balance (matching balance) between the tractor and the agricultural working machine 100 can be improved. Thus, the maneuverability of the tractor can be improved. Also, when the compaction roller 310 is at position P2, interference between the compaction roller 310 and the wall surface (such as a ridge) of the field at the end of the field is prevented. As a result, tillage work can be performed at the end of the field without deteriorating the front-rear center of gravity balance (matching balance) between the tractor and the agricultural working machine 100.

[0055] Next, with reference to FIG. 7, the case where the compaction roller 310 has moved to position P3 will be described. FIG. 7 is an explanatory diagram (side view) when the compaction roller 310 is rotated (jumped up) to position P3. Position P3 is the position where the tip 26b of the leveling unit 26 is disposed at the lowermost end when the leveling unit 26 is rotated upward with respect to the shield cover 24 (the perpendicular line SS3 from the tip 26b toward the ground Gr), and is the position where the perpendicular line from the rearmost end of the compaction roller 310 toward the ground Gr coincides. At this time, the perpendicular line SS2-P3 from the center of the rotation axis (rotation axis 315) of the compaction roller 310 toward the ground Gr approaches the perpendicular line SS1 more than the perpendicular line SS2-P0 in the initial state. That is, at position P3, the distance KD-P3 between the first perpendicular line SS1 and the second perpendicular line SS2-P3 at position P3 of the compaction roller 310 is smaller than the distance KD-P0 between the first perpendicular line SS1 and the second perpendicular line SS2-P0 in the initial state (position P0 of the compaction roller 310). Therefore, the compaction roller 310 is positioned more forward than in the initial state, and the front-rear center-of-gravity balance (matching balance) between the tractor and the agricultural working machine 100 can be further improved. Accordingly, the controllability of the tractor can be further improved. Further, since the perpendicular line (perpendicular line SS3) from the tip 26b of the leveling unit 26 toward the ground Gr, where the tip 26b of the leveling unit 26 is disposed at the lowermost end when the leveling unit 26 is rotated, coincides with the perpendicular line from the rearmost end of the compaction roller 310 toward the ground Gr, interference between the compaction roller 310 and the wall surface (such as a ridge) of the field is prevented at the end of the field. Thus, tillage work can be performed at the end of the field without deteriorating the front-rear center-of-gravity balance (matching balance) between the tractor and the agricultural working machine 100. Further, in a side view (plan view), since the compaction roller 310 is not positioned rearward of the position where the tip 26b of the leveling unit 26 is disposed at the lowermost end (perpendicular line SS3 from the tip 26b toward the ground Gr), the front-rear length of the agricultural working machine 100 can be made compact.

[0056] As described above, in the agricultural working machine 100 according to an embodiment of the present invention, the pressing roller 310 can be rotated upward from the position P1. When the pressing roller 310 is at the position P1, the longitudinal length of the agricultural working machine 100 in side view does not change compared to when the pressing roller 310 is in the initial state (the state where the pressing roller 310 is at the position P0). Therefore, if the pressing roller 310 is rotated at least to the position P1, even if the pressing roller 310 is rotated, the longitudinal center-of-gravity balance (matching balance) between the tractor and the agricultural working machine does not change, and the tractor can be stably operated. And in the agricultural working machine 100 of the present embodiment, the pressing roller 310 can be rotated upward from the position P1. In this case, however, compared to when the pressing roller 310 is in the initial state, the longitudinal length of the agricultural working machine 100 in side view can be shortened, and the center-of-gravity position of the agricultural working machine 100 can be shifted forward. Therefore, the longitudinal center-of-gravity balance (matching balance) between the tractor and the agricultural working machine can be improved. Accordingly, during work, the operability of the tractor can be improved, and the convenience during transportation of the agricultural working machine can be improved.

[0057] Further, when the pressing roller 310 (basket roller) rotates upward from the position P1, interference between the pressing roller 310 and the wall surface (such as a ridge) of the field is prevented at the end of the field. Therefore, even with the pressing roller 310, tillage work can be performed from the end of the field without deteriorating the longitudinal center-of-gravity balance (matching balance) between the traveling body such as a tractor and the agricultural working machine 100.

[0058] <Modification example> The present disclosure is not limited to the above-described embodiments, and includes various other modifications. For example, the above-described embodiments have been described in detail for the purpose of clearly explaining the present disclosure, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of one embodiment may be replaced with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace other configurations for a part of the configuration of each embodiment. Hereinafter, some modifications will be described.

[0059] In one embodiment of the present invention, the electric cylinder 35 is shown as an example of the actuator for changing the position of the pressing roller 310, but the present invention is not limited thereto. For example, an actuator (screw) that expands and contracts by operating a handle may be provided between any one of the side plate 23a, the second support frame 22, and the shield cover 24 and the first connecting member 331 (the second connecting member 332), and the actuator is expanded and contracted by operating the handle to rotate the first connecting member 331 (the second connecting member 332) about the connection portion CP2 between the first connecting member 331 and the side plate 23a (the second connecting member 332 and the side plate 23b) as a rotation fulcrum, so as to change the position of the pressing roller 310.

[0060] In one embodiment of the present invention, an example of providing the pressing work unit 30 (the pressing roller 310) is shown, but the present invention is not limited thereto. As long as it is a spike-shaped roller, a spiral roller, a columnar roller, or has a rotatable shape (roller shape), it is applicable to the present invention.

[0061] In one embodiment of the present invention, an example where the compaction roller 310 rotates (circular arc motion) about the rotation fulcrum is shown, but the present invention is not limited thereto. The compaction roller 310 may not only change its position by circular arc motion, but also change its position linearly or non-linearly. For example, when moving the compaction roller 310, it may be moved upward and then slid parallel, or slid upward and forward or from below to the rear.

[0062] Also, in one embodiment of the present invention, the expansion and contraction state of the electric cylinder 35 may be detected by a sensor, or the height of the compaction roller 310 may be detected by a sensor. For example, detecting these pieces of information can be realized by using an angle sensor (such as a potentiometer, a rotary sensor, etc.) that detects the rotation angle of the first connecting member 331 or the second connecting member 332. In this case, the detection result of the sensor is sent to the control means, and the control means controls the operation of the electric cylinder 35 based on the detection result of the sensor. The relationship between the expansion and contraction state of the cylinder and the height position of the compaction roller 310 may be stored in the storage means provided in the control means of the agricultural working machine 100 in advance. Thereby, the rotation position of the compaction roller 310 can be easily controlled.

[0063] In addition, in one embodiment of the present invention, not only in the cases shown in FIGS. 5 to 7, the compaction roller 310 may be moved upward or forward. Also, according to the situation (such as when the ridge is low, the ridge is high, during transportation, during turning, etc.), the position of the compaction roller 310 is preset, and the operator can select and operate a button or the like provided on a remote control or a mobile terminal according to the situation, so that the position of the compaction roller 310 can be selected. Furthermore, the compaction roller 310 may not be movable to all positions, but may be movable only to one position.

[0064] Further, for example, when a traveling body such as a tractor travels by automatic driving, the position of the rolling roller 310 may be adjustable according to the position information of the traveling body such as a tractor or the agricultural work machine 100 and the information of the field, or a sensor (obstacle sensor, distance sensor, etc.) capable of monitoring the periphery of the rolling roller 310 may be provided, and the position of the rolling roller 310 may be adjustable based on the detection result of the sensor.

[0065] Also, in one embodiment of the present invention, a configuration may be adopted in which the user stores the height of the rolling roller 310 desired by the user in the storage means, and when a predetermined operation is performed with a remote controller or the like, the rolling roller 310 is lifted to the stored height position. In this case, for example, first, the rolling roller 310 is moved to the height desired by the user by a predetermined operation of the user using a remote controller, a mobile terminal, or the like. Then, when the user performs a predetermined operation in a state where the rolling roller 310 is at the height desired by the user, the height of the rolling roller 310 desired by the user (the detection result of the sensor that detects the height of the rolling roller 310) is stored.

[0066] Furthermore, the control means (memory means) may store the height positions of the pressing roller 310 in multiple stages, and the pressing roller 310 may be rotated (lifted up) to the height position desired by the user according to the user's selection. For example, a sensor capable of detecting the above-mentioned position P1, position P2, and position P3 may be provided on the agricultural working machine 100, and the positions of position P1, position P2, and position P3 may be stored, and the pressing roller 310 may be rotated to the position desired by the user by the user's remote control operation. Also, the position information of the field and the height position of the pressing roller 310 may be stored together. The position information of the field can be directly input by the user based on the map information of the field. However, when a position detector (for example, an antenna for a global navigation satellite system (GNSS; Global Navigation Satellite System), but not limited to this) is mounted on a traveling body such as a tractor or the agricultural working machine 100, it is also possible to store the position information of the field detected by this position detector in combination with the height position of the pressing roller 310. For example, if the height position of the pressing roller 310 corresponding to the height position of the ridge in the field is stored in combination with the position of the field, it is possible to control the height of the pressing roller 310 according to the height position of the ridge in the field.

[0067] In addition, in one embodiment of the present invention, an example in which the disk-shaped tilling member 27 is provided has been shown, but tilling members of different shapes may be provided, or a crushing member may be provided instead of the tilling member. Examples of the crushing member include a chisel (subsoiler), but are not limited thereto. Also, the tilling member 27 is not necessarily provided, and the agricultural working machine 100 may be configured without providing the tilling member 27 in front of the tilling working rotor 25.

Explanation of reference numerals

[0068] 10 ··· Mounting part, 11 ··· Top link pin, 12a ··· Lower link connecting part, 13a ··· Top mast, 14a ··· Connecting member, 20 ··· Cultivation working part, 21 ··· First support frame, 22 ··· Second support frame, 23a ··· Side plate, 23b ··· Side plate, 24 ··· Shield cover, 25 ··· Cultivation working rotor, 25a ··· Claw shaft, 25b ··· Cultivation claw, 26 ··· Land leveling part, 26a ··· Upper end part, 26b ··· Tip part, 27 ··· Cultivation member, 28 ··· Fixing member, 29 ··· Screw, 30 ··· Compaction working part, 35 ··· Electric cylinder, 36 ··· Screw, 100 ··· Agricultural working machine, 310 ··· Compaction roller, 311 ··· Rod-shaped compaction working member, 311-1 ··· Large-diameter rod-shaped compaction working member, 311-2 ··· Large-diameter rod-shaped compaction working member, 311-3 ··· Small-diameter rod-shaped compaction working member, 312 ··· Outer support member, 312-1 ··· First outer support member, 312-2 ··· Second outer support member, 313 ··· Inner support member, 315 ··· Rotation shaft, 331 ··· First connecting member, 331a ··· One end, 331b ··· The other end, 332 ··· Second connecting member, 332a ··· One end, 332b ··· The other end

Claims

1. A rotary working unit having a plurality of tilling claws, wherein the plurality of tilling claws rotate about a first rotation axis to perform tilling work; A roller unit provided on the rear side of the rotary working unit and rotating about a second rotation axis; A position adjustment mechanism capable of adjusting the position of the roller unit such that a first distance between a first perpendicular line extending from the first rotation axis toward the ground and a second perpendicular line extending from the second rotation axis toward the ground is less than or equal to a second distance between a third perpendicular line extending from the first rotation axis toward the ground and a fourth perpendicular line extending from the second rotation axis toward the ground when a tangent line connecting the lower end of the rotation locus of the tilling claws and the lower end of the roller unit is horizontal. An agricultural working machine.

2. The position adjustment mechanism adjusts the position of the roller unit such that the lower end of the roller unit is located above the upper end of the rotary working unit. The agricultural working machine according to Claim 1.

3. The position adjustment mechanism includes an arm portion that supports the roller unit, and adjusts the position of the roller unit by rotating the arm portion. The agricultural working machine according to Claim 1.

4. The position adjustment mechanism includes an actuator. The position of the roller unit is adjusted by driving the actuator. The agricultural working machine according to Claim 1.

5. The position adjustment mechanism includes a telescopic screw. The position of the roller unit is adjusted by expanding and contracting the screw. The agricultural working machine according to Claim 1.

6. A leveling unit provided on the rear side of the rotary working unit and performing leveling treatment. The position adjustment mechanism adjusts the position of the roller unit such that the second rotation axis is closer to the first perpendicular line than a third perpendicular line extending from the rear end of the leveling unit toward the ground. The agricultural working machine according to Claim 1.

7. Disposed on the front side of the rotary working unit and having a disk rotatably supported. The agricultural working machine according to Claim 1.

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