Farm working machine

Abstract

To provide a farm working machine capable of protecting an actuator when lifting up and holding a land roller.SOLUTION: A farm working machine includes: a rotary working part mounted on a travel machine body, having a plurality of tilling claws, and performing tilling work; a roller part disposed at the rear side of the rotary working part; a roller part moving mechanism capable of moving the roller part to the rotary working part; and a restriction part for restricting the movement of the roller part by the roller part moving mechanism. In the farm working machine, the roller part moving mechanism includes an arm part for supporting the roller part, the arm part includes a rotary working part side end part rotatably connected to a rotary shaft disposed in the rotary working part, and a roller part side end part connected to the roller part, and the roller part moving mechanism may rotate the arm part around the rotary shaft and move the roller part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an agricultural implement, and more particularly to an agricultural implement that has a tilling and compacting unit equipped with a tilling rotor (also called a "rotary working unit") attached to the rear of a traveling body, and that tills and compacts the soil in a field while moving forward as the traveling body (tractor) moves forward. [Background technology]

[0002] Conventionally, compaction rollers (rolling wheels) have been used as working members for compacting soil in farm fields. Compaction rollers have a working member as well as a support member. The working member is generally cylindrical (sometimes called a work rod). Patent Document 1 discloses an agricultural work machine equipped with a compaction roller. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-93984 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, when a compaction roller is attached to an agricultural implement, a structure with a large mass (weight) is located at a position away from the running body. In this case, the load on the rear of the running body increases, which worsens the balance of the front-to-rear center of gravity (matching balance) between the agricultural implement and the running body to which the agricultural implement is attached. If the matching balance between the agricultural implement and the running body deteriorates, the maneuverability of the tractor deteriorates, and there is a risk that the running body cannot be driven stably.

[0005] Therefore, in order to improve the matching balance, it is possible to consider lifting the suppression roller with an actuator. However, if the suppression roller is lifted by the actuator and held by the actuator's holding force alone while traveling or transporting, the large mass (weight) of the suppression roller places a heavy load on the actuator, which could cause damage to the actuator.

[0006] Furthermore, when the suppression roller is lifted, depending on the lifted position of the suppression roller, it may be in a position where it cannot be returned to its original position even if the actuator is driven, which is known as overstepping the fulcrum, and there is a risk that it will not be possible to return the suppression roller to its original position even if an attempt is made to lower it.

[0007] In view of the above problems, an object of the present invention is to provide an agricultural work machine that can protect the actuator when the suppression roller is lifted and held. Another object of the present invention is to provide an agricultural work machine that can lift the suppression roller while limiting the position to which the suppression roller is lifted to a range that allows it to be returned to its original position. [Means for solving the problem]

[0008] According to one embodiment of the present invention, an agricultural work machine is provided that includes a rotary work unit that is attached to a traveling body, has a plurality of tillage tines, and performs tillage work, a roller unit that is provided on the rear side of the rotary work unit, a roller unit moving mechanism that can move the roller unit relative to the rotary work unit, and a limiting unit that limits the movement of the roller unit by the roller unit moving mechanism.

[0009] In the above agricultural work machine, the roller unit moving mechanism includes an arm unit that supports the roller unit, and the arm unit includes a rotary working unit side end that is rotatably connected to a rotation axis provided on the rotary working unit, and a roller unit side end that is connected to the roller unit, and the roller unit moving mechanism may move the roller unit by rotating the arm unit around the rotation axis.

[0010] In the above agricultural work machine, the roller unit moving mechanism includes an extendable actuator having an actuator rotary working unit side end rotatably connected to a rotary working unit side fixed part provided on the rotary working unit, and an actuator arm side end rotatably connected to an arm side fixed part provided on the arm unit, and the roller unit may be moved by extending and contracting the actuator to rotate the arm unit.

[0011] In the agricultural work machine, when the agricultural work machine is viewed from the side, the limiting section may be provided closer to the running body than the pivot axis and inside an imaginary circle formed by the rotation of the arm section.

[0012] In the agricultural work machine, the limiting section may limit the movement of the roller section so that the movement of the roller section is within a range that allows the actuator to drive the roller section to return it to its position before movement.

[0013] In the above agricultural work machine, the limiting portion may be provided in a position such that, when the roller portion is rotated, the actuator arm side end portion does not coincide with or exceed an imaginary line connecting the rotation axis and the rotary working unit side fixing portion provided on the rotary working unit. [Effects of the Invention]

[0014] According to one embodiment of the present invention, it is possible to provide an agricultural work machine that can protect the actuator when the suppression roller is lifted and held. Also, according to one embodiment of the present invention, it is possible to provide an agricultural work machine that can lift the suppression roller while limiting the position to which the suppression roller is lifted to a range that allows it to be returned to its original position. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic view of an agricultural work machine according to an embodiment of the present invention, viewed obliquely from the rear. [Figure 2] 1 is a schematic top view of an agricultural work machine according to an embodiment of the present invention. FIG. [Figure 3] 1 is a schematic rear view of an agricultural work machine according to an embodiment of the present invention. FIG. [Figure 4] 1 is a schematic view of an agricultural work machine according to an embodiment of the present invention, viewed obliquely from the front. [Figure 5] 1 is a schematic cross-sectional view of an agricultural work machine according to an embodiment of the present invention, as viewed from the side. [Figure 6] 1 is a schematic cross-sectional view of an agricultural work machine according to an embodiment of the present invention, as viewed from the side. [Figure 7] 1 is a schematic view of an agricultural work machine according to an embodiment of the present invention, viewed obliquely from the rear. [Figure 8] 1 is a schematic top view of an agricultural work machine according to an embodiment of the present invention. FIG. [Figure 9] 1 is a schematic rear view of an agricultural work machine according to an embodiment of the present invention. FIG. [Figure 10] 1 is a schematic view of an agricultural work machine according to an embodiment of the present invention, viewed obliquely from the front. [Figure 11] 1 is a schematic cross-sectional view of an agricultural work machine according to an embodiment of the present invention, as viewed from the side. [Figure 12] 1 is a schematic cross-sectional view of an agricultural work machine according to an embodiment of the present invention, as viewed from the side. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the agricultural work machine of the present invention will be described with reference to the drawings. However, the agricultural work machine of the present invention can be embodied in many different forms, and should not 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 similar functions are given the same reference numerals, and repeated explanations thereof will be omitted.

[0017] For ease of explanation, terms indicating directions such as up (upper side), down (lower side), forward (front side), backward (rear side), right (right side), and left (left side) are used, but the direction in which gravity acts is downward, and the opposite is upward. Also, the direction in which the traveling machine body moves is forward, and the opposite is backward. Furthermore, when facing forward, the right side is the right side, and the left side is the left side.

[0018] First Embodiment (1-1. Configuration of agricultural machinery) The following describes the configuration of an agricultural work machine 100 according to one embodiment of the present invention. In this embodiment of the present invention, the agricultural work machine 100 is exemplified as a tillage work machine that is attached to the rear of a traveling body such as a tractor and is towed by the traveling body to till a field.

[0019] FIG. 1 is a schematic diagram of an agricultural work machine according to one embodiment of the present invention, as seen from the diagonally rear left side. FIG. 2 is a schematic top view of the agricultural work machine according to one embodiment of the present invention. FIG. 3 is a schematic rear view of the agricultural work machine according to one embodiment of the present invention. FIG. 4 is a schematic diagram of an agricultural work machine according to one embodiment of the present invention, as seen from the diagonally front left side. FIGS. 5 and 6 are schematic cross-sectional views of the agricultural work machine according to one embodiment of the present invention, as seen from the side, taken along the dashed dotted line connecting A1 and A2. Note that FIGS. 1 to 6 show the general configuration of an agricultural work machine 100 according to one embodiment of the present invention, and for ease of explanation, some components are not shown. For example, FIGS. 1 to 3 show a configuration in which tilling members 27 and fixing members 28, which will be described later, are arranged near the left and right ends of a first support frame 21, which will be described later. However, in reality, tilling members 27 and fixing members 28 are also provided in portions other than the left and right ends of the first support frame 21. That is, the tilling members 27 and the fixing members 28 are arranged not only near the left and right ends of the first support frame 21, but also inside the illustrated tilling members 27 and fixing members 28, near the lower link connectors 12a and 12b, and the like. The arrangement of the tilling members 27 and fixing members 28 can be changed as appropriate, but it is preferable to arrange them symmetrically about the center of the agricultural work machine 100. Also, in FIG. 4, the first support frame 21, the multiple tilling members 27 and fixing members 28, and the lower link connectors 12a and 12b are omitted. Furthermore, in FIGS. 5 and 6, the first connector 331 is omitted.

[0020] The agricultural work machine 100 according to one embodiment of the present invention broadly comprises an attachment unit 10, a tilling work unit 20, and a compacting work unit 30. Each unit will be described in detail below.

[0021] (1-1-1. Mounting part 10) The mounting portion 10 has a top link connecting portion 11, a pair of lower link connecting portions 12a and 12b, top masts 13a and 13b, and a pair of connecting members 14a and 14b.

[0022] The top masts 13a and 13b are fixed to the second support frame 22 of the tilling work unit 20 and support the top link connector 11. The lower link connectors 12a and 12b are fixed to the first support frame 21. The connectors 14a and 14b connect the top link connector 11 and the lower link connectors 12a and 12b and function as reinforcing members (stays).

[0023] The top link connector 11 and the lower link connectors 12a and 12b are connected to a three-point linkage (not shown) provided at the rear of a traveling machine body such as a tractor. The structure of a three-point linkage is well known, so a description thereof will be omitted here. By connecting the mounting unit 10 to the three-point linkage of the traveling machine body, the agricultural work machine 100 of one embodiment of the present invention is mounted to the rear of the traveling machine body.

[0024] (1-1-2. Cultivation work department 20) The tilling working unit 20 has a first support frame 21, a second support frame 22, a pair of outer side plates 23a and 23b, a pair of first inner side plates 23c and 23d, and a pair of second inner side plates 23e and 23f, mounting members 45a and 45b, a shield cover 24, a tilling work rotor 25, a soil leveling unit 26, tilling members 27, and fixing members 28. In one embodiment of the present invention, the tilling work unit 20 or the tilling work rotor 25 is also referred to as a "rotary working unit."

[0025] The first support frame 21 and the second support frame 22 extend in the left-right direction and are disposed so as to be (substantially) parallel to each other. Outer side plates 23a and 23b are connected to both end portions of the first support frame 21 and the second support frame 22 and support the outer side plates 23a and 23b. In this embodiment, the first support frame 21 is made of square pipes and the second support frame 22 is made of round pipes, which function as structural members of the agricultural work machine 100, i.e., the machine body frame. As described above, the second support frame 22 supports the top link connector 11 via the top masts 13a and 13b. The first support frame 21 further supports the lower link connectors 12a and 12b.

[0026] Furthermore, the first support frame 21 supports a plurality of tilling members 27. The plurality of tilling members 27 are members that perform tilling work prior to work by the tilling rotor 25 as the traveling body travels. In this embodiment, the tilling members 27 are (flower-shaped) discs formed with concave curved surfaces. Although not shown, some of the tilling members 27 (disks) are arranged with their concave curved surfaces facing each other so as to sandwich the tires of the traveling body when viewed from behind. The tilling members 27 with their concave curved surfaces facing each other are arranged so that the tire tracks of the traveling body are located between them, that is, so that the tilling members 27 are positioned so as to sandwich the tire tracks, and can erase the tire tracks in cooperation with the tilling rotor 25. Furthermore, the discs with their concave curved surfaces facing each other are (independently) rotatably supported by the fixed member 28 so that their concave curved surfaces face diagonally upward and are diagonally aligned with the direction of travel so as to widen forward. The tilling members 27 have the functions of tilling the topsoil, softening it, moving the tilled soil, and preventing the tilling working unit 20 from floating up. Note that multiple tilling members 27 may be arranged at predetermined intervals on the first support frame 21 via fixing members 28.

[0027] 1 to 3, only one tilling member 27 is shown on each of the left and right ends of the agricultural work machine 100, but as mentioned above, the number of tilling members 27 (disks) is not limited to that shown, and there may be two on each side, or three or more on each side. Note that the tilling members 27 are not limited to discs, and may be other tilling members. Examples of tilling members other than discs include subsoiler members that break down and soften the subsoil (also called subsoil).

[0028] A tillage rotor 25 is installed between the outer side plates 23a and 23b. A shield cover 24 is installed between the outer side plates 23a and 23b and covers the upper side of the tillage rotor 25. The shield cover 24 prevents soil clods from flying upward when the tillage rotor 25 is performing tillage work. The outer side plates 23a and 23b and the shield cover 24 also function as a machine frame.

[0029] The first inner side plates 23c and 23d are provided on the shield cover 24 and more inward than the outer side plates 23a and 23b, i.e., closer to the center of the agricultural work machine 100. The second inner side plates 23e and 23f are provided on the shield cover 24 more inward than the first inner side plates 23c and 23d. Fixed portions 23ca and 23da are provided between the first inner side plate 23c and the second inner side plate 23e, and between the first inner side plate 23d and the second inner side plate 23f, respectively, to serve as rotation axes for a first connecting member 331 and a second connecting member 332 (described later) that support a suppression roller 310 (described later) of the suppression work unit 30 (see FIGS. 1 and 2).

[0030] The mounting members 45a and 45b each have a lower member connected (fixed) to the second support frame 22, and an upper member connected (bolted) to the top of the lower member and rotatably supporting (pivoting) the electric cylinder 35 described below. In this embodiment, the lower member and upper member of the mounting members 45a and 45b are configured as separate bodies, but they can also be configured as an integrated unit.

[0031] Furthermore, as will be described in detail later, in one embodiment of the present invention, a limiting portion 40 that limits the position of the suppression roller 310, which will be described later, is installed between the mounting members 45a and 45b. The limiting portion 40 abuts against the first connecting member 331 and the second connecting member 332, which will be described later and which support the suppression roller 310, and functions as a means for limiting their forward rotation. In this embodiment, the abutting portions of the limiting portion 40 that abut against the first connecting member 331 and the second connecting member 332 are formed straight (linear), and the side opposite the abutting portions is curved so that the central portion is narrowest.

[0032] The shape of the limiting portion 40 is not limited to the above, as long as it can limit the forward rotation of the first connecting member 331 and the second connecting member 332. For example, instead of the above, the limiting portion 40 may be configured to suspend the mounting members 45a and 45b from a long plate-like member or a hollow pipe, or instead of suspending the mounting members 45a and 45b, the mounting members 45a and 45b may each be provided with a convex portion that corresponds to the rotation trajectory of the first connecting member 331 and the second connecting member 332 and abuts against them, thereby limiting the forward rotation of the first connecting member 331 and the second connecting member 332. In addition, the mounting members 45a and 45b may be configured to directly abut the first connecting member 331 and the second connecting member 332, but a cushioning member made of resin or an elastic material (rubber, spring, etc.) may be provided at the abutment portion of the mounting members 45a and 45b, so that the mounting members 45a and 45b indirectly abut the first connecting member 331 and the second connecting member 332 via the cushioning member.

[0033] The limiting portion 40 is provided closer to the traveling machine body (front side) than the fixing portions 23ca and 23da, which serve as rotation axes of the first connecting member 331 and the second connecting member 332 described below that support the suppression roller 310, and inside an imaginary circle VC1 of radius R that is formed by the rotation of the first connecting member 331 and the second connecting member 332. In other words, the limiting portion 40 is provided within the rotation trajectory of the first connecting member 331 and the second connecting member 332 described below that support the suppression roller 310. In this case, the radius R indicates the distance between the fixing portion 23ca and an end 331b (the outermost portion of the end 331b) of the first connecting member 331 described below, and the distance between the fixing portion 23da and an end 332b (the outermost portion of the end 332b) of the second connecting member 332 described below.

[0034] The tillage rotor 25 includes a tine shaft 25a and multiple tines 25b. Multiple tines 25b are arranged around the tine shaft 25a at predetermined mounting positions. Multiple mounting positions for the tines 25b are provided at predetermined intervals along the length of the tine shaft 25a. In Figures 5 and 6, dotted circle 25c represents the rotational path of the tines 25b.

[0035] In one embodiment of the present invention, the tillage tines 25b may be attached to the tine shaft 25a with a phase shift between adjacent attachment positions. In other words, when the tillage rotor 25 is viewed from the direction along the tine shaft 25a (left-right direction), the multiple adjacent tillage tines 25b at each attachment position are arranged in a spiral from one side of the tine shaft 25a to the other. This reduces resistance when the tillage rotor 25 tills, and also makes it possible to obtain a uniform field surface with few irregularities. Note that the arrangement of the multiple tillage tines 25b is not limited to a spiral arrangement and can be changed as appropriate.

[0036] The claw shaft 25a is rotatably attached to the outer side plates 23a and 23b via bearings or the like. The claw shaft 25a can also be called a rotating shaft. In one embodiment of the present invention, power from a traveling machine body such as a tractor is transmitted to the claw shaft 25a via a power transmission shaft (not shown) inserted inside the second support frame 22 and a chain arranged inside a chain case. When the claw shaft 25a rotates, the multiple tillage tines 25b also rotate, and the tillage rotor 25 performs tillage work.

[0037] The soil leveling section 26 (also referred to as the "apron") is provided on the rear side of the tillage rotor 25. An upper end 26a of the soil leveling section 26 is rotatably connected to the outer side plates 23a and 23b. A tip 26b of the soil leveling section 26 comes into contact with the ground at its lowest end and levels the surface of the field that has been tilled by the tillage rotor 25. Note that the tip 26b of the soil leveling section 26 does not necessarily come into contact with the ground at its lowest end, and depending on the tillage tines 25b attached to the tine shafts 25a, the tip 26b of the soil leveling section 26 may not come into contact with the ground at its lowest end.

[0038] (1-1-3. Suppression Work Unit 30) As shown in Figures 1 to 5, the suppressing work unit 30 is disposed behind the tilling work unit 20. The suppressing work unit 30 has a suppressing roller 310, a first connecting member 331, and a second connecting member 332 (also referred to as "arm units"). In one embodiment of the present invention, the suppressing work unit 30 or the suppressing roller 310 is also referred to as a "roller unit."

[0039] As will be described in detail later, the suppression roller 310 (in this example, a basket roller) is positioned outside the rotation trajectory of the soil leveling unit 26 so as not to interfere with the rotation of the soil leveling unit 26. The suppression roller 310 is connected to the tilling work unit 20 by a first connecting member 331 and a second connecting member 332. Specifically, one (front) end 332a of the second connecting member 332 is disposed between the first inner side plate 23d and the second inner side plate 23f as shown in FIG. 2, and is rotatably connected to a fixing portion 23da (rotation shaft) provided on the first inner side plate 23d and the second inner side plate 23f as shown in FIG. 5. The other (rear) end 332b of the second connecting member 332 is connected to a second outer support member 314 of the suppression roller 310, which will be described later. Like the one end 332a of the second connecting member 332, the one end 331a of the first connecting member 331 is disposed between the first inner side plate 23c and the second inner side plate 23e and is rotatably connected to a fixed portion 23ca (rotation shaft) provided on the first inner side plate 23c and the second inner side plate 23e. Similarly to the other end 332b of the second connecting member 332, the other end 331b is connected to a second outer support member 314 (described later) of the suppression roller 310. The one end 331a of the first connecting member 331 and the one end 332a of the second connecting member 332 are also referred to as the "rotary working unit side end." The other end 331b of the first connecting member 331 and the other end 332b of the second connecting member 332 are also referred to as the "roller unit side end." The suppression roller 310 is supported by the first connecting member 331 and the second connecting member 332.

[0040] Furthermore, in one embodiment of the present invention, an electric cylinder 35 is installed between the mounting member 45a and the first connecting member 331, and between the mounting member 45b and the second connecting member 332. As shown in FIG. 5, the electric cylinder 35 has an end 35a and an end 35b. The end 35a is rotatably connected to a fixed portion 45ba (also referred to as the "electric cylinder rotary working unit side fixed portion") provided on the mounting member 45b. In this example, the fixed portion 45ba is disposed on the tillage working unit 20 (more specifically, directly above the tine shaft 25a (first rotating shaft) of the tillage working rotor 25). The fixed portion 45ba is provided on the traveling machine body side and above the fixed portion 23da. Similar to the mounting member 45b, the mounting member 45a also has a fixed portion to which the end 35a of the electric cylinder 35 is rotatably connected. The end 35a is also referred to as the "actuator rotary working unit side end portion." The end 35b is rotatably connected to a fixing portion 332c (also referred to as "electric cylinder arm side fixing portion") provided on the second connecting member 332 (arm portion). Similarly to the second connecting member 332, the first connecting member 331 is also provided with a fixing portion to which the end 35b of the electric cylinder 35 is rotatably connected. The end 35b is also referred to as "actuator arm side end portion").

[0041] The suppression roller 310 includes a rod-shaped suppression work member 311, a first outer support member 312, an inner support member 313, and a second outer support member 314. The suppression roller 310 is constructed by fitting a plurality of rod-shaped suppression work members 311 into grooves formed in a plurality of ring-shaped first outer support members 312 (outer support member 312-1 and outer support member 312-2) and the plurality of inner support members 313, and welding the grooves together. Furthermore, both the outer support member 312-1 and the outer support member 312-2 have a rotation shaft 315 (also referred to as the "second rotation shaft") located inside an opening formed near their centers. The rotation shaft 315 is rotatably supported by the second outer support member 314. In other words, the suppression roller 310 rotates around the rotation shaft 315. The second outer support member 314 is spaced apart from the rod-shaped suppression work member 311 and the inner support member 313 and is arranged to connect the first outer support members 312 (outer support member 312-1 and outer support member 312-2) on both sides, and has a bearing portion that rotatably supports the rotating shaft 315.

[0042] The rod-shaped suppression work member 311 has a cylindrical shape (circular shape in side view). In the suppression roller 310, the rod-shaped suppression work member 311 is disposed at an angle with respect to the rotation axis 315.

[0043] In the agricultural work machine 100 of one embodiment of the present invention, as the traveling body travels and moves forward, the compacting roller 310 moves forward while rotating after the tilling work unit 20 has passed. At this time, a plurality of rod-shaped compacting members 311 are configured to crush and compact the soil clods in the field that has been tilled by the tilling work unit 20.

[0044] In addition, in the suppression roller 310, one rod-shaped suppression work member 311-1 and the rod-shaped suppression work member 311-2 arranged adjacently are spaced apart from each other in the circumferential direction D R The rod-shaped suppression work members 311 are spaced apart at a distance S. By providing a gap between the rod-shaped suppression work members 311, soil that gets into the suppression roller 310 can be released. The width of the gap S is not limited, and may be set appropriately depending on the diameter of the rod-shaped suppression work members 311, the degree of suppression, ease of soil release, etc.

[0045] Furthermore, although the configuration in which ten rod-shaped suppression work members 311 are arranged is illustrated, the number of rod-shaped suppression work members 311 is not limited to this.

[0046] Furthermore, the shape of the rod-shaped suppression work members 311 in a side view is circular, but is not limited to this. The shape of the rod-shaped suppression work members 311 in a side view may be an arc or a rectangle (plate-like). Note that the shapes of the rod-shaped suppression work members 311 may all be the same, or may not all be the same shape with some having different shapes, or may not all be the same size (diameter, etc.) with some having different sizes.

[0047] In one embodiment of the present invention, the first connecting member 331 is connected to the fixed portion 23ca, the suppression roller 310, and the electric cylinder 35. Similarly, the second connecting member 332 is connected to the fixed portion 23da, the suppression roller 310, and the electric cylinder 35. The electric cylinder 35 is connected to the mounting member 45a and the first connecting member 331, and to the mounting member 45b and the second connecting member 332. By extending or contracting the electric cylinder 35, the position of the end portion 35b changes. Accordingly, the first connecting member 331 and the second connecting member 332 rotate around the fixed portion 23ca and the fixed portion 23da (rotation shafts), thereby moving (rotating) the suppression roller 310 relative to the tillage rotor 25. 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 "roller unit movement mechanism."

[0048] The limiting unit 40 is provided at a position where, when the suppression work unit 30 is rotated, the end 35b (actuator arm side end) of the electric cylinder 35 does not coincide with or exceed an imaginary line VL1 connecting the fixed portion 23da (rotation axis of the second connecting member 332) and the fixed portion 45ba of the mounting member 45b. Similarly, the end 35b (actuator arm side end) of the electric cylinder 35 is provided at a position where it does not coincide with or exceed an imaginary line connecting the fixed portion 23ca (rotation axis of the first connecting member 331) and the fixed portion of the mounting member 45a. The reason why the limiting unit 40 is provided at a position where the end 35b (actuator arm side end) of the electric cylinder 35 does not coincide with or exceed an imaginary line connecting the fixed portions 23ca, 23da (rotation axis of the first connecting member 331, rotation axis of the second connecting member 332) and the fixed portions of the mounting members 45a, 45b is to prevent the electric cylinder 35 from going over the fulcrum. When the electric cylinder 35 is retracted to rotate the suppression work unit 30 forward, and then the electric cylinder 35 is extended to return the suppression work unit 30 to its original position, and the suppression work unit 30 is rotated backward, the position at which the suppression work unit 30 starts to rotate backward, i.e., the position at which the suppression work unit 30 stops after rotating forward, if the position of the end 35b (actuator arm end) of the electric cylinder 35 coincides with or exceeds the imaginary line VL1 connecting the fixed part 23da (the rotation axis of the second connecting member 332) and the fixed part 45ba of the mounting member 45b (the imaginary line connecting the fixed part 23ca (the rotation axis of the first connecting member 331) and the fixed part of the mounting member 45a), the suppression work unit 30 cannot be returned to its original position even if the electric cylinder 35 is driven. If the end 35b of the electric cylinder 35 coincides with the imaginary line VL1, the electric cylinder 35 cannot be extended. Furthermore, if the end 35b of the electric cylinder 35 crosses the imaginary line VL1 and is positioned forward of the imaginary line VL1, extending the electric cylinder 35 will cause the suppression work unit 30 to rotate further forward, making it impossible to rotate the suppression work unit 30 rearward. In this specification, the state in which the end 35b (actuator arm side end) of the electric cylinder 35 coincides with or crosses the imaginary line VL1 and the suppression work unit 30 cannot be rotated rearward, i.e., the suppression work unit 30 cannot be returned to its original position, is sometimes referred to as crossing the fulcrum.

[0049] The limiting unit 40 is positioned to limit the rotation range of the first connecting member 331 and the second connecting member 332, preventing the suppression unit 30 (the suppression roller 310) from going beyond the fulcrum. That is, the limiting unit 40 is positioned so that the suppression unit 30 (the suppression roller 310), which has been rotated forward, can be rotated rearward by extending the electric cylinder 35 (a position where the suppression unit 30 does not go beyond the fulcrum). The limiting unit 40 is supported by the second support frame 22, which functions as the machine frame, via mounting members 45a and 45b, and is therefore able to stably hold the suppression unit 30 at position P1. The mounting position of the limiting unit 40 can be changed as needed, for example, depending on the arrangement of the first connecting member 331 and the second connecting member 332, which axially support the suppression roller 310. However, to stably hold the suppression unit 30, it is preferable to provide the limiting unit 40 on the machine frame (e.g., the outer side plates 23a and 23b, the shield cover 24, etc.).

[0050] Although not shown, the agricultural work machine 100 of one embodiment of the present invention is provided with a control means for controlling the operation of the electric cylinder 35. The control means is attached, for example, to a machine frame such as the shield cover 24, the first support frame 21, or the second support frame 22, either directly or via a mounting bracket. In one embodiment of the present invention, the control means stores various control programs and the like, and the control means controls the drive of the electric cylinder 35 based on user operation of a remote control, mobile terminal, or the like.

[0051] The control means is configured to be able to communicate wirelessly or via wire with a remote control, a mobile terminal (including a smartphone, tablet, PC, etc.), etc., and controls the operation of the electric cylinder 35 based on signals from the remote control, mobile terminal, etc. in accordance with a control program. For example, the control means may control the electric cylinder 35 to operate only while the user is pressing an operation button based on signals from the remote control, mobile terminal, etc. Also, for example, a (specific) operation button may be associated with a predetermined rotation position of the suppression roller 310, and when the control means detects that the user has pressed the operation button, the control means may drive and control the electric cylinder 35 until the suppression roller 310 reaches the predetermined rotation position.

[0052] Alternatively, a hydraulic cylinder may be used instead of the electric cylinder 35, and the hydraulic cylinder may be controlled by operating a hydraulic control lever provided near the driver's seat inside the traveling vehicle body to adjust the position of the suppression roller 310. Alternatively, other expandable members such as an electric hydraulic cylinder may be used.

[0053] Furthermore, in one embodiment of the present invention, as will be described later, when tilling the edge of a field, it is desirable that the lower end of the repression roller 310 be higher than the upper end of the tillage rotor 25. In this embodiment, for example, the connection part CP2 (fixing part 23da) between the second connecting member 332 and the first inner side plate 23d, which serves as the rotation axis of the repression roller 310, is provided at a higher position than the connection part CP1 between the soil leveling unit 26 and the shield cover 24, which serves as the rotation axis of the soil leveling unit 26, but the positional relationship between the connection parts CP2 and CP1 is not limited to this.

[0054] As described above, the agricultural work machine 100 according to one embodiment of the present invention is towed as the traveling body travels, and tills the field through cooperation of the tilling members 27 and the tilling rotor 25. Then, the soil clods in the field that have been tilled by the tilling members 27 and the tilling rotor 25 can be crushed and compacted by the action of the compacting roller 310.

[0055] (1-2. Placement of the suppression roller) Next, possible arrangements of the suppression roller 310 of the agricultural work machine 100 applied in one embodiment of the present invention will be described with reference to Figs.

[0056] 5 is an explanatory diagram (cross-sectional view seen from the side) of the suppression roller 310 when it is positioned at position P0, which is the initial state (working state). As shown in FIG. 5, position P0, where the lower end of the suppression roller 310 is in contact with or close to the ground surface Gr, is the initial state.

[0057] FIG. 6 is an explanatory diagram (viewed from the side) of the suppression roller 310 when it is moved (jumped up) to position P1. Position P1 is the position where the suppression roller 310 is rotated and jumped up above the tillage rotor 25. At this time, the end 332b of the second connecting member 332 is closer to the traveling machine body (front) than the end 332a connected to the fixed portion 23da, which serves as the rotation axis, so the second connecting member 332 is tilted forward. Therefore, when attempting to hold the suppression roller 310 at position P1, where the suppression roller 310 is in a forward-leaning posture, a large load due to the suppression roller's own weight is applied to the second connecting member 332 and the electric cylinder 35. However, in this embodiment, because the agricultural work machine 100 includes the limiting unit 40, when the suppression roller 310 is jumped up to position P1, the load applied when holding the suppression roller 310 at position P1 can also be distributed to the limiting unit 40. More specifically, the limiting unit 40 is located closer to the traveling machine body (front side) than the fixed unit 23da, which serves as the rotation axis of the suppression roller 310, and inside the imaginary circle VC1 formed by the rotation of the second connecting member 332. Therefore, when the suppression roller 310 is at position P1, the limiting unit 40 contacts (abuts) the first connecting member 331 and the second connecting member 332. As a result, the load applied when holding the suppression roller 310 at position P1 also acts on the limiting unit 40, thereby providing better protection for the electric cylinder 35 than in a configuration in which the limiting unit 40 is not provided. Without the limiting unit 40, attempting to hold the suppression work unit 30 at position P1 would cause the suppression work unit 30 to rotate further forward due to the mass (weight) of the suppression roller 310, resulting in a load being applied to the electric cylinder 35 in a contracting direction. In this way, by providing the limiting section 40 and limiting the forward rotation of the suppression work section 30, the load on the electric cylinder can be reduced and the electric cylinder 35 can be protected.

[0058] Furthermore, the suppressing work unit 30 is set to position P1 (flip-up position) when plowing the edge of a field, traveling on a public road, entering and leaving a field, transporting on the back of a truck, etc. The suppressing work unit 30 is susceptible to vibrations when traveling or transporting, and the vibrations cause the suppressing work unit 30 to try to rotate. Therefore, by limiting the rotation of the suppressing work unit 30 with the limiting unit 40, the load on the electric cylinder can be reduced and the electric cylinder 35 can be protected.

[0059] As described above, the limiting unit 40 is positioned so that the end 35b (actuator arm end) of the electric cylinder 35 does not coincide with or exceed the imaginary line VL1 connecting the fixed portion 23da (the rotation axis of the second connecting member 332) of the first inner side plate 23d and the fixed portion 45ba of the mounting member 45b. This limits the rotation of the suppression roller 310 to a range that allows it to return to its original position. Therefore, the electric cylinder 35 can lift the suppression roller 310 while maintaining normal operation. The limiting unit 40 is positioned so that the end 35b (actuator arm end) of the electric cylinder 35 does not coincide with or exceed the imaginary line connecting the fixed portions 23ca, 23da (the rotation axis of the first connecting member 331, the rotation axis of the second connecting member 332) and the fixed portions of the mounting members 45a, 45b to prevent the electric cylinder 35 from going beyond the fulcrum. When the electric cylinder 35 is retracted to rotate the suppression unit 30 forward, and then the electric cylinder 35 is extended to return the suppression unit 30 to its original position, and the suppression unit 30 is rotated backward, the position at which the end 35b (actuator arm end) of the electric cylinder 35 starts to rotate, i.e., the position at which the suppression unit 30 stops after rotating forward, coincides with or exceeds the imaginary line VL1 connecting the fixed part 23da (the rotation axis of the second connecting member 332) and the fixed part 45ba of the mounting member 45b (the imaginary line connecting the fixed part 23ca (the rotation axis of the first connecting member 331) and the fixed part of the mounting member 45a). Driving the electric cylinder 35 will not allow the suppression unit 30 to return to its original position. When the end 35b of the electric cylinder 35 coincides with the imaginary line VL1, the electric cylinder 35 will not be able to be extended. Furthermore, if the end 35b of the electric cylinder 35 crosses the imaginary line VL1 and is positioned forward of the imaginary line VL1, extending the electric cylinder 35 will cause the suppression work unit 30 to rotate further forward, making it impossible to rotate the suppression work unit 30 rearward. Therefore, the limiting unit 40 is positioned to limit the rotation range of the first connecting member 331 and the second connecting member 332 and prevent the suppression work unit 30 from going beyond the fulcrum. In other words, the limiting unit 40 is positioned so that the suppression work unit 30 (suppression roller 310), which has been rotated forward, can be rotated rearward (a position where the suppression work unit 30 will not go beyond the fulcrum) by extending the electric cylinder 35.

[0060] Furthermore, in this embodiment, the compaction roller 310 is positioned further forward than in the initial state, which improves the balance between the front and rear centers of gravity (matching balance) between the tractor and the agricultural work machine 100. This further improves the maneuverability of the tractor. Furthermore, because the compaction roller 310 is prevented from interfering with the wall surfaces (ridges, etc.) of the field at the edge of the field, tilling work can be performed at the edge of the field without worsening the balance between the front and rear centers of gravity (matching balance) between the tractor and the agricultural work machine 100. Furthermore, the front-to-rear length of the agricultural work machine 100 can be made compact.

[0061] Second Embodiment In the first embodiment, an example was shown in which the end 35a of the electric cylinder 35 was connected to mounting members 45a and 45b arranged directly above the claw shaft 25a (first rotating shaft) of the tillage rotor 25, but in this embodiment, an example will be described in which the end 35Aa of the electric cylinder 35A is connected to a fixing part 11c provided in the vicinity of the top link connecting part 11. Note that explanations of configurations that overlap with the first embodiment will be omitted where appropriate.

[0062] Fig. 7 is a schematic view of an agricultural work machine 100A according to an embodiment of the present invention, seen from the diagonally rear left side. Fig. 8 is a schematic top view of the agricultural work machine 100A according to an embodiment of the present invention. Fig. 9 is a schematic rear view of the agricultural work machine 100A according to an embodiment of the present invention. Fig. 10 is a schematic view of the agricultural work machine 100A according to an embodiment of the present invention, seen from the diagonally front left side. Figs. 11 and 12 are schematic cross-sectional views of the agricultural work machine 100A according to an embodiment of the present invention, seen from the side. Like Figs. 1 to 6, Figs. 7 to 12 show the general configuration of the agricultural work machine 100 according to an embodiment of the present invention, and for ease of explanation, some parts are not shown.

[0063] In this embodiment, as shown in FIGS. 7 to 12, one electric cylinder 35A is installed between the top link connector 11 and an installation member 333 that is installed between the first connecting member 331 and the second connecting member 332. Therefore, the electric cylinder 35A is longer than the electric cylinder 35 of the first embodiment. An end 35Aa of the electric cylinder 35A is rotatably connected to a fixing portion 11c that is provided near the top link connector 11. An end 35Ab of the electric cylinder 35A is rotatably connected to the installation member 333.

[0064] In this embodiment, the restricting portion 40A is provided on each of the mounting members 45a and 45b. The mounting member 45a is provided with a restricting portion 40Aa corresponding to the first connecting member 331, and the mounting member 45a is provided with a restricting portion 40Ab corresponding to the second connecting member 332. The restricting portions 40Aa and 40Ab are each L-shaped and are provided inside the mounting members 45a and 45b, respectively.

[0065] 11 is an explanatory diagram (cross-sectional view seen from the side) of the suppression roller 310 when it is positioned at position P0, which is the initial state (working state). As shown in FIG. 11, position P0, where the lower end of the suppression roller 310 is in contact with or close to the ground surface Gr, is the initial state.

[0066] FIG. 12 is an explanatory diagram (side view) of the suppression roller 310 when it is rotated (jumped up) to position P1. Position P1 is the position where the suppression roller 310 has rotated and jumped up above the tillage rotor 25. At this time, the end 332b of the second connecting member 332 is closer to the traveling machine body (front) than the end 332a connected to the fixed part 23da, which serves as the rotation axis, so the second connecting member 332 is tilted forward. As a result, a large load from the suppression roller is applied to the second connecting member 332 and the electric cylinder 35A. However, as described above, in this embodiment, the agricultural work machine 100A has a limiting unit 40A. The limiting unit 40A is located closer to the traveling machine body (front) than the fixed part 23da, which serves as the rotation axis of the suppression roller 310, and is located inside the imaginary circle VC1 formed by the rotation of the second connecting member 332. Therefore, at position P1, the limiting portion 40A abuts against the first connecting member 331 and the second connecting member 332. As a result, when the suppression roller 310 is lifted, the limiting portion 40A reduces the load on the electric cylinder 35A, thereby protecting the electric cylinder 35A.

[0067] <Modification> 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 to clearly explain the present disclosure, and are not necessarily limited to those including all of the described configurations. Furthermore, part of the configuration of one embodiment may be replaced with the configuration of another embodiment, or the configuration of another embodiment may be added to the configuration of one embodiment. Furthermore, part of the configuration of each embodiment may be added to, deleted from, or replaced with another configuration. Some modifications will be described below.

[0068] In one embodiment of the present invention, an example is shown in which the suppression work unit 30 (suppression roller 310) is provided, but the present invention is not limited to this. Any roller having a rotatable shape (roller shape), such as a spike-shaped roller, a spiral roller, or a cylindrical roller, can be applied to the present invention.

[0069] In one embodiment of the present invention, the suppression roller 310 rotates (moves in an arc) around the rotation axis via the electric cylinder 35, but the present invention is not limited to this. The suppression roller 310 may change its position not only by arc movement but also by linear or non-linear movement. For example, when moving the suppression roller 310, the suppression roller 310 may be moved upward and then slid in parallel, or may be slid upward and forward or downward and backward.

[0070] Furthermore, in one embodiment of the present invention, an example in which a disk-shaped cultivating member 27 is provided has been shown, but cultivating members of a different shape may be provided, or crushing members may be provided instead of cultivating members. Crushing members include, but are not limited to, chisels (subsoiler). Furthermore, the cultivating member 27 does not necessarily have to be provided, and the agricultural work machine 100 may be configured without a cultivating member 27 provided in front of the cultivating rotor 25.

[0071] Furthermore, although the example in which the electric cylinder, the connecting member, and the limiting portion are provided above the shield cover has been shown, the electric cylinder, the connecting member, and the limiting portion may be configured to be disposed outside the outer side plate.

[0072] Furthermore, in one embodiment of the present invention, the limiting portion 40 limits the forward rotation of the suppression roller 310 by restricting the forward rotation of the connecting member, but the limiting portion may be configured to directly contact the suppression roller 310 to restrict its forward rotation. For example, the limiting portion 40 may be configured to contact the second outer support member 314. [Explanation of symbols]

[0073] 10···Mounting portion, 11···Top link connecting portion, 11c··Fixing portion, 12a···Lower link connecting portion, 13a···Top mast, 13b···Top mast, 14a···Connecting member, 20···Tillage working portion, 21···First support frame, 22···Second support frame, 23a, 23b···Outer side plate, 23c, 23d···First inner side plate, 23ca···Fixed part, 23cb...fixing part, 23e, 23f...second inner side plate, 23da...fixing part, 24...shield cover, 25...cultivation rotor, 25a...tine shaft, 25b...cultivation tine, 25c...circle, 26...ground leveling part, 26a...upper end part, 26b...tip part, 27...cultivation member, 28...fixing member, 30...pressure work part, 35...electric cylinder, 35a...end part, 35A···electric cylinder, 35Aa···end part, 35Ab···end part, 35b···end part, 40···restriction part, 40A···restriction part, 40Aa···restriction part, 40Ab···restriction part, 45a, 45b···mounting member, 100···agricultural work machine, 100A···agricultural work machine, 310···pressure roller, 311···rod-shaped suppression work member, 311-1···rod-shaped suppression work member, 311-2···rod shape compression work member, 312...first outer support member, 312-1...outer support member, 312-2...outer support member, 313...inner support member, 314...second outer support member, 315...rotation Shaft, 331...first connecting member, 331a...end, 331b...end, 331c...fixing part, 332...second connecting member, 332a...end, 332b...end, 333...erecting member

Claims

1. Attached to the running body, a rotary working unit having a plurality of tilling tines and performing tilling work; a roller unit provided on the rear side of the rotary working unit; a roller unit moving mechanism that can move the roller unit relative to the rotary working unit; a limiting unit that limits the movement of the roller unit by the roller unit moving mechanism, Agricultural machinery.

2. the roller unit moving mechanism includes an arm unit that supports the roller unit, the arm unit includes a rotary working unit side end portion rotatably connected to a rotation shaft provided on the rotary working unit, and a roller unit side end portion connected to the roller unit, the roller unit moving mechanism rotates the arm unit around the rotation axis to move the roller unit; The agricultural implement according to claim 1.

3. the roller unit moving mechanism includes an extendable actuator having an actuator rotary working unit side end rotatably connected to a rotary working unit side fixed part provided on the rotary working unit, and an actuator arm side end rotatably connected to an arm side fixed part provided on the arm unit, The actuator is extended and retracted to rotate the arm portion, thereby moving the roller portion. The agricultural implement according to claim 2.

4. When the agricultural implement is viewed from the side, The limiting portion is provided on the traveling machine body side of the rotation axis and inside a virtual circle formed by the rotation of the arm portion, The agricultural implement according to claim 3.

5. The limiting portion is The movement of the roller unit is limited so that the movement of the roller unit is within a range in which the roller unit can be returned to its original position by driving the actuator. The agricultural implement according to claim 3.

6. The limiting portion is When the roller unit is rotated, The actuator arm side end is provided at a position that does not coincide with or exceed an imaginary line connecting the rotation axis and the rotary working unit side fixed part provided on the rotary working unit. The agricultural implement according to claim 5.

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