JP7464988B2 - Agricultural machinery - Google Patents

Description

The present invention relates to an agricultural machine. In particular, it relates to an agricultural machine in which multiple disks are arranged in front of a work rotor that tills a field.

Conventionally, rotary implements are known as agricultural implements used for tilling fields. Although rotary implements have excellent soil-crushing and plowing capabilities, they require a large amount of power, and there is a limit to how fast the tractor can be increased. On the other hand, there is an agricultural implement called a disc harrow that can be used to increase the tractor's speed. A disc harrow can be towed at a speed more than twice as fast as a rotary implement, but its leveling and soil-crushing capabilities are inferior to those of a rotary implement, making it unsuitable for purposes such as creating seedbeds.

As an agricultural machine that combines the advantages of the rotary work machine and disc harrow described above, an agricultural machine with multiple disks arranged in front of the rotary work machine is known (Patent Document 1). The soil cultivation device described in Patent Document 1 has multiple rotatable disks arranged in front of multiple rotary tines, and the rotational action of the multiple disks divides the field as a pre-treatment for tilling work using the rotary tines. The soil cultivation device described in Patent Document 1 aims to use the pre-treatment by the disks to reduce the driving resistance of the rotary tines into the field and the resistance underground, thereby making tilling work more efficient.

Japanese Utility Model Application Publication No. 57-96608

The soil tillage device described in Patent Document 1 has a large gap between the disk body and the rotary tines, so although it can reduce the driving resistance of the rotary tines into the field and the resistance underground, it has the problem of impairing soil crushing performance. In addition, residual tillage is left in the field after plowing (the field surface becomes uneven), so sowing seeds in such a field reduces the field's evenness, which may have a negative impact on seed germination and seedling growth. Therefore, there is a need for the development of an agricultural machine suitable for creating seedbeds.

One of the objectives of the present invention is to reduce the load on the work rotor of an agricultural machine that has multiple disks arranged in front of the work rotor without compromising soil crushing performance.

An agricultural work machine according to one embodiment of the present invention comprises a work rotor including a plurality of tilling tines arranged along the axial direction of a rotary shaft, and a disk unit including a plurality of disks arranged in front of the work rotor and supported rotatably, the plurality of tilling tines including a first tilling tine curved toward a first axial direction and a second tilling tine curved toward a second direction opposite to the first direction, the work rotor includes a first portion in which the adjacent first tilling tines and the second tilling tines are arranged with a gap between them so that their rotation ranges do not overlap, one of the plurality of disks is arranged in front of the first portion, and in a front view, the rotation range of the disk overlaps with at least one of the rotation ranges of the first tilling tines and the rotation range of the second tilling tines.

In a plan view, when the agricultural work machine moves, the rotation range of the disk may overlap with at least one of the rotation range of the first tilling tine and the rotation range of the second tilling tine.

The work rotor may further include a second portion in which the adjacent first and second tillage tines are arranged so that their rotational ranges overlap. In this case, the disk may not be arranged in front of the second portion.

An agricultural work machine according to one embodiment of the present invention comprises a work rotor including a plurality of tilling tines arranged along the axial direction of a rotating shaft, and a disk unit arranged in front of the work rotor and including a plurality of disks each rotatably supported, the plurality of tilling tines including a first tilling tine curved toward a first axial direction and a second tilling tine curved toward a second direction opposite to the first direction, the work rotor includes a first portion in which the adjacent first tilling tines and the second tilling tines are arranged with a gap between them so that their rotation ranges do not overlap, and a second portion in which the adjacent first tilling tines and the second tilling tines are arranged so that their rotation ranges overlap, and one of the plurality of disks is arranged to overlap the gap when viewed from the front.

An agricultural work machine according to one embodiment of the present invention comprises a work rotor including a plurality of tilling tines arranged along the axial direction of a rotating shaft, and a disk unit arranged in front of the work rotor and including a plurality of disks each rotatably supported, the plurality of tilling tines including a first tilling tine curved toward a first axial direction and a second tilling tine curved toward a second direction opposite to the first direction, the work rotor includes a first portion in which the adjacent first tilling tines and the second tilling tines are arranged with a first gap so that their rotation ranges do not overlap, and a second portion in which the adjacent first tilling tines and the second tilling tines are arranged with a second gap narrower than the first gap so that their rotation ranges do not overlap, and one of the plurality of disks is arranged to overlap the first gap in a front view.

The disk does not have to be located in front of the second portion.

The plurality of disks may include a first disk having a concave surface facing the first direction, and a second disk having a concave surface facing the second direction. In this case, the gap between adjacent first disks and second disks may be wider than the gap between adjacent first disks or the gap between adjacent second disks.

The gap between the adjacent first and second disks may be located behind the travel means of the traveling body that tows the agricultural machine.

According to an embodiment of the present invention, in an agricultural machine in which multiple disks are arranged in front of the work rotor, it is possible to reduce the load on the work rotor while maintaining soil crushing performance.

1 is a diagram showing the appearance of an agricultural work machine according to a first embodiment. FIG. 1 is a diagram showing the appearance of an agricultural work machine according to a first embodiment. FIG. FIG. 2 is a diagram for explaining the positional relationship between the tiller tines and the disk of the agricultural work machine in the first embodiment. FIG. 2 is a diagram for explaining the positional relationship between the tiller tines and the disk of the agricultural work machine in the first embodiment. FIG. 2 is a diagram illustrating a schematic diagram of the positional relationship between the tiller tines and the disk of the agricultural machine in the first embodiment. 5 is a diagram showing the relationship between the direction in which soil is thrown by the disk of the agricultural machine and the tilling tines in the first embodiment. FIG. FIG. 11 is a diagram showing a schematic diagram of the positional relationship between the tiller tines and the disk of an agricultural work machine in a second embodiment. FIG. 13 is a diagram showing a schematic diagram of the positional relationship between the tiller tines and the disk of an agricultural work machine in a third embodiment. FIG. 13 is a diagram illustrating a schematic diagram of the positional relationship between the tiller tines and the disk of an agricultural work machine in a fourth embodiment. FIG. 13 is a diagram illustrating a schematic diagram of the positional relationship between the tiller tines and the disk of an agricultural work machine in a fifth embodiment.

Below, an embodiment 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 forms, and should not be interpreted as being limited to the description of the examples shown below. In the drawings referred to in this embodiment, identical parts or parts having similar functions are given the same reference numerals, and repeated explanations will be omitted.

In the specification and claims of this application, "up" refers to a direction moving away from the field in a generally vertical direction, and "down" refers to a direction moving toward the field in a generally vertical direction. "Front" refers to the direction in which the farm machine travels, and "rear" refers to the opposite direction from front. "Left" refers to the left when facing the direction in which the farm machine travels, and "right" refers to the opposite direction from left.

Also, with the axial center of the rotating shaft of the work rotor as a reference, the side closer to the center is sometimes called the "inner side" and the side farther from the center is sometimes called the "outer side."

In this specification, the term "rotation range" refers to the range covered by the path of a rotating body, such as a tilling tine or disk, when viewed from the front or in a plan view. In other words, it can also be said to refer to the range through which the rotating body passes when viewed from the front or in a plan view when the rotating body rotates while the agricultural machine is moving forward. For example, the range of the rotation range of the tilling tine or disk that actually comes into contact with and acts on the field (cultivation range) refers to the lateral width within which the tilling tine or disk can cultivate.

First Embodiment
(Configuration of agricultural machinery)
The following describes the configuration of the agricultural work machine 100 of this embodiment. In this embodiment, the agricultural work machine 100 is exemplified by a rotary work machine that is attached to the rear of a traveling body such as a tractor and is towed by the traveling body to cultivate farm fields.

1 and 2 are diagrams showing the external configuration of the agricultural work machine 100 of the first embodiment. Specifically, FIG. 1(A) is a perspective view of the agricultural work machine 100 as seen from diagonally above the front left, and FIG. 1(B) is a front view of the agricultural work machine 100 as seen from the front. Also, FIG. 2(A) is a bottom view of the agricultural work machine 100 as seen from below, and FIG. 2(B) is a side view of the agricultural work machine 100 as seen from the left side. Note that FIGS. 1 and 2 show the general configuration of the agricultural work machine 100 of this embodiment, and for ease of explanation, some parts may be omitted from the illustration.

The agricultural work machine 100 of this embodiment broadly includes an attachment unit 10, a tilling work unit 20, a disk unit 30, and a suppression work unit 40. Each unit will be described below.

The mounting section 10 includes a top mast 110 and a lower link connection section 115. The top mast 110 and the lower link connection section 115 function as a connection mechanism for mounting the agricultural work machine 100 to a traveling machine body (not shown) such as a tractor. In the agricultural work machine 100 of this embodiment, the top mast 110 and the lower link connection section 115 are sometimes collectively referred to as a front hitch. The front hitch is connected to the traveling machine body by a support section provided at the top of the top mast 110 and two support sections provided on both the left and right sides of the lower link connection section 115.

The top mast 110 and the lower link connection part 115 are respectively connected to the top link of the traveling body (not shown) and the lower links provided at two locations on the left and right (i.e., a three-point link hitch mechanism). When the agricultural work machine 100 is attached to the traveling body by the attachment part 10, it becomes possible to input power from the input shaft 117. The input shaft 117 is also called the PIC (Power Input Connection) shaft, and functions as an interface that transmits power from the traveling body. The input shaft 117 is connected to the PTO (Power Take Off) shaft of the traveling body by a universal joint or the like. The agricultural work machine 100 and the traveling body may be connected via an auto hitch frame.

The tilling work unit 20 includes a work rotor 220 supported by a first main frame 210, a shield cover 230 that covers the upper part of the work rotor 220, a ground leveling member 240 that covers the rear of the work rotor 220, a compression rod 250 that presses the ground leveling member 240 against the field with a constant pressure, and a chain drive unit 260 that transmits power to the work rotor 220. The work rotor 220 includes a rotating shaft 222 and a plurality of tilling tines 224 arranged along the axial direction of the rotating shaft 222.

The power input from the input shaft 117 is transmitted to the chain drive unit 260 via a power transmission shaft (not shown) arranged inside the first main frame 210, and is further transmitted to the rotating shaft 222 of the work rotor 220. The chain drive unit 260 has a chain and sprockets inside a chain case, and connects the power transmission shaft and the rotating shaft 222. When the power is transmitted to the rotating shaft 222, the multiple tilling tines 224 rotate together with the rotating shaft 222. In this way, when the work rotor 220 rotates, the multiple tilling tines 224 act on the field, and tilling work is performed in the field.

The disk unit 30 includes a second main frame 310, a disk support part 320, a disk arm 330, and a disk 340. The disk support part 320 is a member fixed to the second main frame 310, and supports a plurality of disks 340. In this embodiment, an example is shown in which one disk support part 320 is provided with two disks 340, but this is not limited thereto, and only one disk 340 or three or more disks 340 may be supported.

The multiple disks 340 are each rotatably supported by a disk arm 330 fixed to the disk support portion 320. In this embodiment, the disk arm 330 is a plate-shaped member having a curved portion (or a bent portion). As shown in FIG. 1(B), the multiple disks 340 are supported so that their respective concave surfaces 341 face diagonally upward. Also, as shown in FIG. 2(A), the multiple disks 340 are each supported diagonally with respect to the traveling direction of the agricultural work machine 100.

By supporting the multiple disks 340 at an angle to the direction of travel, each disk 340 can excavate a wider area of the field, improving the soil crushing performance of the disk unit 30. In addition, because the concave curved surfaces 341 of the multiple disks 340 face diagonally upward, each of the multiple disks 340 can be made to release soil. In this embodiment, the field leveling performance is also improved by controlling the direction in which the multiple disks 340 release the soil.

The suppression work unit 40 includes a basket bracket 410, a roller arm 420, an angle adjustment mechanism 430, a basket roller 440, a scraper bracket 450, and a scraper 460. The basket bracket 410 is fixed to the first main frame 210 and is a bracket for supporting the basket roller 440 arranged at the rear. One end of the roller arm 420 is rotatably fixed to the basket bracket 410, and the other end is rotatably fixed to the basket roller 440. The angle of the roller arm 420 relative to the basket bracket 410 can be adjusted by a screw-type angle adjustment mechanism 430 that is spanned between the two.

The basket roller 440 has a structure in which multiple bars 440b are mounted on multiple ring-shaped support members 440a, and is rotatably supported by the roller arm 420. In the agricultural work machine 100 of this embodiment, when the running body travels forward, the basket roller 440 rotates as it travels past the tilling work unit 20. At that time, the multiple bars 440b are configured to crush and compact the soil clods in the field that have been tilled by the tilling work unit 20. The scraper 460 is arranged so that an elastic member such as rubber is in contact with the basket roller 440, and plays a role in removing soil that has adhered to the basket roller 440 during compacting work.

The agricultural work machine 100 of this embodiment described above improves the soil crushing performance of the agricultural work machine 100 by devising the arrangement of the multiple tilling tines 224 on the work rotor 220 and the arrangement of the multiple disks 340 on the disk unit 30. This will be explained below.

(Relative position of the tiller tines and disc)
Fig. 3 is a diagram for explaining the positional relationship between the tilling tines 224 and the disk 340 of the agricultural work machine 100 in the first embodiment. Specifically, Fig. 3(A) corresponds to an enlarged view of a portion of the bottom view of the agricultural work machine 100 shown in Fig. 2(A). Fig. 3(B) corresponds to an enlarged view of a portion of the second portion 220b shown in Fig. 3(A).

As shown in FIG. 3(A), the work rotor 220 includes a first portion 220a and a second portion 220b. The first portion 220a is a portion where the adjacent first tillage tine 224a and second tillage tine 224b are arranged with a gap X so that their rotation ranges do not overlap. The second portion 220b is a portion where the adjacent first tillage tine 224a and second tillage tine 224b are arranged so that their rotation ranges overlap.

Here, the first tillage tine 224a refers to a tillage tine that, among the multiple tillage tines 224, curves toward the first direction D1 in the axial direction of the rotating shaft 222 (in this embodiment, the left direction in the direction of travel). Also, the second tillage tine 224b refers to a tillage tine that, among the multiple tillage tines 224, curves toward the second direction D2 in the axial direction of the rotating shaft 222 (in this embodiment, the right direction in the direction of travel). However, when there is no need to particularly distinguish between the first tillage tine 224a and the second tillage tine 224b, they may be collectively referred to as tillage tines 224.

As shown in FIG. 3B, in the second portion 220b, the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b overlap. Therefore, in the second portion 220b, the first tilling tine 224a and the second tilling tine 224b can till the field without any gaps, allowing tilling work with high soil crushing properties to be performed.

In contrast, as shown in Fig. 3A, in the first portion 220a, the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b do not overlap. That is, there is a gap X between the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b, and therefore no tilling work is performed by the tillage tine 224 in the gap X. However, in this embodiment, as shown in Fig. 3A, at least one of the multiple disks 340 is disposed in front of the first portion 220a in line with the gap X, so that the disk 340 can also crush soil in the portion corresponding to the gap X.

In addition, in the disk unit 30 of this embodiment, the multiple disks 340 are all supported at an angle to the traveling direction of the agricultural work machine 100, so that the rotation range of each disk 340 can be secured to be wide. Therefore, even if the gap X between the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b is widened, one disk 340 can crush the soil in the portion corresponding to the gap X.

Here, FIG. 4 is a diagram for explaining the positional relationship between the tilling tines 224 and the disk 340 of the agricultural work machine 100 in the first embodiment. Specifically, FIG. 4 shows the positional relationship between the first tilling tines 224a and the second tilling tines 224b and the disk 340 during tilling work, as viewed from the front. In reality, as shown in FIG. 3(A), the disk 340 is positioned in front of the first tilling tines 224a and the second tilling tines 224b.

The state shown in FIG. 4 is a schematic diagram of the first tilling tine 224a, the second tilling tine 224b, and the disk 340 tilling the field 50. Here, the portion of the rotation range of the first tilling tine 224a that is actually acting on the field 50 is called the tilling range TW1, and the portion of the rotation range of the second tilling tine 224b that is actually acting on the field 50 is called the tilling range TW2. Also, the portion of the rotation range of the disk 340 that is actually acting on the field 50 is called the tilling range TW3. Note that the width of the tilling range TW1 of the first tilling tine 224a and the width of the tilling range TW2 of the second tilling tine 224b may be the same or different.

As shown in FIG. 4, in a front view, the tilling range TW1 of the first tilling tine 224a and the tilling range TW2 of the second tilling tine 224b partially overlap with the tilling range TW3 of the disk 340. At this time, there is a gap X shown in FIG. 3A between the tilling range TW1 of the first tilling tine 224a and the tilling range TW2 of the second tilling tine 224b. That is, in this embodiment, the width of the tilling range TW3 of the disk 340 is larger than the gap X between the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b. In addition, the depth (tillage depth) of the first tillage tine 224a and the second tillage tine 224b acting on the field 50 is approximately the same as the depth (tillage depth) of the disk 340 acting on the field 50. In other words, the bottom end positions of the first tillage tine 224a and the second tillage tine 224b from the surface of the field 50 are approximately the same as the bottom end position of the disk 340 from the surface of the field 50.

In this embodiment, even if there is a gap X between the adjacent first and second tillage tines 224a and 224b, the disk 340 arranged in front of the first and second tillage tines 224a and 224b can crush the part of the field that corresponds to the gap X, so the number of tillage tines can be reduced while maintaining the soil crushing performance. With this configuration, the agricultural work machine 100 of this embodiment can reduce the load on the work rotor 220 without impairing the soil crushing performance. In addition, the agricultural work machine 100 of this embodiment is arranged so that the lower end positions of the first and second tillage tines 224a and 224b from the surface of the field 50 and the lower end position of the disk 340 from the surface of the field 50 are approximately aligned, so that the field can be finished with a higher levelness and work suitable for making a seedbed can be performed.

In FIG. 4, an example is shown in which the tilling range TW3 of the disk 340 overlaps with each of the tilling range TW1 of the first tilling tine 224a and the tilling range TW2 of the second tilling tine 224b, but this is not limited thereto, and it may overlap with either the tilling range TW1 of the first tilling tine 224a or the tilling range TW2 of the second tilling tine 224b, or it may not overlap with both. In addition, in this embodiment, an example is shown in which the overlap range (also called the overlap amount) between the tilling range TW1 of the first tilling tine 224a and the tilling range TW3 of the disk 340 is equal to the overlap range between the tilling range TW2 of the second tilling tine 224b and the tilling range TW3 of the disk 340, but they may be different.

The agricultural work machine 100 of this embodiment has a configuration that erases the tracks (ruts) of the traveling means (e.g., wheels or caterpillar tracks) of the traveling body by arranging multiple disks 340 and multiple tilling tines 224. Specifically, the disks 340 are arranged to sandwich the traveling tracks of the traveling body, and the soil pushed aside in the first direction D1 and the second direction D2 by the traveling means is returned to the traveling tracks (depressions formed in the field).

As shown in FIG. 3A, the disk unit 30 of this embodiment includes a first disk 340a and a second disk 340b. Here, the first disk 340a refers to a disk of the multiple disks 340 whose concave surface 341 faces the first direction D1. Also, the second disk 340b refers to a disk of the multiple disks 340 whose concave surface 341 faces the second direction D2. However, when there is no need to particularly distinguish between the first disk 340a and the second disk 340b, they may be collectively referred to as disk 340.

In the agricultural work machine 100 of this embodiment, the gap W1 between adjacent first and second disks 340a and 340b is wider than the gap W2 between adjacent first and second disks 340a and 340b. This gap W1 is located behind the travel means of the traveling body that tows the agricultural work machine 100. In other words, the adjacent first and second disks 340a and 340b are positioned so as to sandwich the travel track 52 of the traveling body that tows the agricultural work machine 100.

At this time, the first disk 340a and the second disk 340b are both supported so that the concave curved surface 341 faces diagonally upward, so that the soil in the field can be crushed and the soil can be thrown away. Therefore, as shown in FIG. 3(A), by placing the first disk 340a and the second disk 340b on either side of the running track 52 of the running body, the soil pushed aside on both sides of the running track 52 can be returned to the running track 52.

3A shows an example in which the adjacent first and second disks 340a and 340b are arranged to sandwich the running trace 52 of the traveling body that tows the agricultural work machine 100, but this is not limited to the above. For example, two first disks 340a and two second disks 340b are shown in FIG. 3A, but the first disk 340a on the left side of the paper (D2 direction) of the two first disks 340a and the second disk 340b on the left side of the paper (D2 direction) of the two second disks 340b may be arranged to sandwich the running trace 52 of the traveling body that tows the agricultural work machine 100. Also, the first disk 340a on the left side of the paper (D2 direction) and the second disk 340b on the right side of the paper (D1 direction) may be arranged to sandwich the running trace 52 of the traveling body that tows the agricultural work machine 100. Furthermore, the first disk 340a on the right side of the page (D1 direction) and the second disk 340b on the right side of the page (D1 direction) may be arranged to sandwich the travel trail 52 of the traveling body that tows the agricultural work machine 100.

In addition, in the working rotor 220 of this embodiment, the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b overlap each other behind the above-mentioned gap W1. That is, the above-mentioned second part 220b is positioned so as to overlap the gap W1 between the adjacent first disk 340a and second disk 340b (in other words, the disk 340 is not positioned in front of the second part 220b). In the agricultural work machine 100 of this embodiment, after a certain amount of soil is returned to the running track 52 of the running body using the disk 340, the running track 52 is tilled by the multiple overlapping tilling tines 224, so that a highly even field can be formed.

The agricultural work machine 100 of the first embodiment has been described above using Figures 1 to 4, but the positional relationship between the multiple tilling tines 224 and the multiple discs 340 can be summarized as shown in Figure 5. The reference characters shown in Figures 3(A) and 3(B) correspond to the reference characters shown in Figure 5, respectively. As shown in Figure 5, in this embodiment, the first disc 340a and the second disc 340b are arranged outside the rotating shaft 222. Therefore, according to the configuration shown in Figure 5, the width that can be tilled by the disc unit 30 can be secured to be wider than the width that can be tilled by the work rotor 220.

As shown in FIG. 5, in a plan view, the first disk 340a is positioned such that the rotation range RW3 of the first disk 340a partially overlaps with both the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b when the agricultural work machine 100 advances. In addition, there is a gap X between the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b. In other words, the first disk 340a is positioned in front of the gap X.

The rotation range RW1 of the first tilling tine 224a is a rectangle surrounded by the long and short sides when the long side is the diameter of a virtual circle that is the rotation trajectory when the first tilling tine 224a rotates, and the short side is the length corresponding to the tine height of the first tilling tine 224a. Similarly, the rotation range RW2 of the second tilling tine 224b is a rectangle surrounded by the long and short sides when the long side is the diameter of a virtual circle that is the rotation trajectory when the second tilling tine 224b rotates, and the short side is the length corresponding to the tine height of the second tilling tine 224b. Furthermore, the rotation range RW3 of the first disk 340a is a rectangle that corresponds to a circumscribing rectangle (the smallest rectangle that can include the outline) when the first disk 340a is viewed in a plane.

Thus, in this embodiment, even if a gap X exists between the rotation range RW1 of the first tillage tine 224a and the rotation range RW2 of the second tillage tine 224b, the first disk 340a arranged in front of the gap X can crush the soil without the portion of the field corresponding to the gap X remaining uncultivated and as a streak (residual tillage being possible).

In FIG. 5, when the agricultural work machine 100 advances in a plan view, an example is shown in which the rotation range RW3 of the first disk 340a overlaps with the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b, but this is not limited thereto, and the rotation range RW3 of the first disk 340a may overlap with either the rotation range RW1 of the first tilling tine 224a or the rotation range RW2 of the second tilling tine 224b, or may not overlap with both. In addition, in this embodiment, an example is shown in which the overlap range (also called the overlap amount) between the rotation range RW1 of the first tilling tine 224a and the rotation range RW3 of the first disk 340a is different from the overlap range between the rotation range RW2 of the second tilling tine 224b and the rotation range RW3 of the first disk 340a, but the two may be equal.

In this embodiment, two first disks 340a and two second disks 340b are arranged so that the concave surfaces 341 face each other across the travel track 52 of the traveling body, but this configuration is not limited to this. However, it is desirable to arrange the concave surface 341 of the outermost disk 340 so that it faces inward so that the soil is directed toward the work rotor 220 when the disk unit 30 is used to break soil in the field.

As described above, the multiple disks 340 have the concave curved surface 341 facing diagonally upward, and therefore have the function of throwing soil. Therefore, when the disk unit 30 crushes the field, the soil is thrown by the disks 340, causing the soil to move. In this case, if the soil moves significantly toward the outside of the agricultural work machine 100, there is a risk that the evenness of the field will be compromised. Therefore, in this embodiment, the direction in which the soil is thrown by the multiple disks 340 is taken into consideration, and the movement of the soil is suppressed.

Figure 6 is a diagram showing the relationship between the direction in which soil is thrown by the disk 340 of the agricultural work machine 100 in the first embodiment and the tillage tines 224. As shown in Figure 6, in this embodiment, the soil thrown by the disk 340 is forcibly returned to the field by the tillage tines 224 midway (before falling into the field). In other words, at the frame line 55 shown in Figure 6, the thrown soil hits the tillage tines 224 rotating in the downcut direction and is dropped into the field. This makes it possible to prevent the soil from moving significantly even if it is thrown in the second direction D2 by the disk 340.

The direction and distance in which the disk 340 throws the soil vary depending on various parameters, such as the vehicle speed of the traveling machine, the angle of the disk 340 relative to the traveling direction, the direction in which the concave curved surface 341 faces, and the distance between the disk 340 and the tilling tines 224. However, under any conditions, as described above, it is preferable that the thrown soil is dropped by the tilling tines 224 midway through the throwing process and returned to the field.

Second Embodiment
In the second embodiment, an example will be described in which the arrangement of the disk 340 and the tilling tines 224 is different from that of the first embodiment. For convenience of explanation, the same elements as those in the first embodiment are denoted by the same reference numerals and explanations thereof will be omitted.

Figure 7 is a diagram for explaining the positional relationship between the tilling tines 224 and the disk 340 of the agricultural work machine in the second embodiment. As shown in Figure 7, in this embodiment, there is no part corresponding to the second part 220b in the first embodiment, and the first part 220a is arranged in the axial direction of the rotating shaft 222. Therefore, the number of tilling tines 224 provided on the work rotor 220 can be reduced compared to the first embodiment, and the load on the work rotor 220 can be reduced.

On the other hand, because the disks 340 are disposed in front of each of the first portions 220a, the portions of the first portions 220a corresponding to the gaps X are also crushed. This reduces the load on the work rotor 220 while maintaining the soil crushing performance.

In this embodiment, multiple first disks 340a are arranged from the axial center of the rotating shaft 222 toward the first direction D1, and the left end of the disk unit 30 is the second disk 340b. Conversely, multiple second disks 340b are arranged from the center toward the second direction D2, and the right end of the disk unit 30 is the first disk 340a. However, this is not limited to this example, and all disks from the center toward the first direction D1 may be second disks 340b, and all disks from the center toward the second direction D2 may be first disks 340a.

In addition, if the tilling tines 224 are arranged along the rotating shaft 222 so that the gap X of the first portion 220a is larger than in this embodiment, the number of tilling tines 224 can be reduced compared to this embodiment. If the number of tilling tines 224 is reduced, the number of gaps X will naturally be reduced, and the number of disks 340 arranged in front of the first portion 220a will also be reduced. This further reduces the load on the work rotor 220 and allows for faster work.

Third Embodiment
In the third embodiment, an example will be described in which the arrangement of the disk 340 and the tilling tines 224 is different from that of the first embodiment. For convenience of explanation, the same elements as those in the first embodiment are denoted by the same reference numerals and explanations thereof will be omitted.

Figure 8 is a diagram for explaining the positional relationship between the tilling tines 224 and the disk 340 of the agricultural machine in the third embodiment. As shown in Figure 8, in this embodiment, similar to the second embodiment, the first portion 220a is arranged in the axial direction of the rotating shaft 222. Therefore, similar to the second embodiment, the number of tilling tines 224 can be reduced compared to the first embodiment, thereby reducing the load on the work rotor 220.

Also, like the second embodiment, a disk 340 is disposed in front of each of the first portions 220a. Therefore, in this embodiment, the portion of the first portion 220a corresponding to the gap X is crushed, so that the load on the work rotor 220 can be reduced while maintaining the soil crushing performance.

This embodiment differs from the second embodiment in that a first disk 340a and a second disk 340b are provided at both the left and right ends of the disk unit 30 so that the concave curved surface 341 faces inward, and the first disk 340a and the second disk 340b are arranged in pairs between them. Specifically, the first disk 340a is provided at the end of the disk unit 30 in the second direction D2, and the second disk 340b is provided at the end of the first direction D1. Then, multiple pairs 60 of the first disk 340a and the second disk 340b are arranged between them with the concave curved surfaces 341 facing each other.

By configuring in this way, the first disk 340a throws soil in the first direction D1, and the second disk 340b throws soil in the second direction D2, so that overall soil movement is suppressed and the evenness of the field after tilling work can be maintained.

In addition, if the tilling tines 224 are arranged along the rotating shaft 222 so that the gap X of the first portion 220a is larger than in this embodiment, the number of tilling tines 224 can be reduced compared to this embodiment. If the number of tilling tines 224 is reduced, the number of gaps X will naturally be reduced, and the number of disks 340 arranged in front of the first portion 220a will also be reduced. This further reduces the load on the work rotor 220 and allows for faster work.

Fourth Embodiment
In the fourth embodiment, an example will be described in which the arrangement of the disk 340 and the tilling tines 224 is different from that of the first embodiment. For convenience of explanation, the same elements as those in the first embodiment are denoted by the same reference numerals and explanations thereof will be omitted.

Figure 9 is a diagram for explaining the positional relationship between the tilling tines 224 and the disks 340 of the agricultural work machine in the fourth embodiment. In the fourth embodiment, as in the first embodiment, a gap W3 is provided between the first disk 340a and the second disk 340b so as to sandwich the travel track (not shown) of the traveling body. The gap W3 is wider than the gap W4 between adjacent first disks 340a or second disks 340b. In this embodiment, as in the first embodiment, soil can be efficiently returned to the travel track of the traveling body, and the evenness of the field can be maintained.

Also, as in the first embodiment, there is a gap X between the adjacent first and second tillage tines 224a and 224b, and the disk 340 is disposed in front of the first and second tillage tines 224a and 224b. Therefore, in this embodiment, the part of the field that corresponds to the gap X can also be crushed, so the number of tillage tines can be reduced while maintaining the soil crushing performance. With this configuration, the load on the work rotor 220 can be reduced without compromising the soil crushing performance.

Here, this embodiment differs from the first embodiment in that the rotation ranges of the first tilling tine 224a and the second tilling tine 224b do not overlap behind the gap W3. Specifically, in the example shown in FIG. 9, a gap X2 is provided between the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b in the portion corresponding to the second portion 220b of the first embodiment shown in FIG. 5. In this case, it is preferable that the width of the gap X2 is narrower than the width of the gap X. Specifically, it is preferable that the width of the gap X2 is greater than zero and smaller than the width of the gap X.

If there is a gap between the rotation range RW1 of the first tilling tine 224a and the rotation range RW2 of the second tilling tine 224b behind the gap W3 provided in the disk unit 30, there is a risk that only that portion will not be tilled and will remain as a streak. However, if the width of the gap is small enough, the possibility of streaks remaining can be almost ignored, so it can be said that as long as the width of the gap X2 is greater than zero and smaller than the width of the gap X, the soil crushing performance will not be impaired.

Fifth Embodiment
The fifth embodiment is an example in which the number of disks 340 and the number of tilling tines 224 are reduced compared to the fourth embodiment. For convenience of explanation, the same elements as those in the first embodiment are denoted by the same reference numerals and explanations thereof will be omitted.

Figure 10 is a diagram for explaining the positional relationship between the tilling tines 224 and the disks 340 of the agricultural machine in the fifth embodiment. As shown in Figure 10, in this embodiment, as in the fourth embodiment, a gap W5 is provided between the first disk 340a and the second disk 340b so as to sandwich the running trace (not shown) of the running body. In this case, the gap W5 is wider than the gap W6 between adjacent first disks 340a or between adjacent second disks 340b. Also, as in the fourth embodiment, behind the gap W5, the rotation ranges of the first tilling tines 224a and the second tilling tines 224b do not overlap each other, and there is a gap X2 between the rotation ranges of the first tilling tines 224a and the second tilling tines 224b.

In this embodiment, the number of first portions 220a is fewer than in the fourth embodiment, and therefore the number of disks 340 arranged in front of the first portions 220a is also fewer than in the fourth embodiment. Therefore, the work rotor 220 as a whole has fewer cultivating tines 224 and disks 340 than in the fourth embodiment. Therefore, by reducing the number of cultivating tines 224 compared to the fourth embodiment, the load on the work rotor 220 is further reduced. Of course, because disks 340 are arranged in front of each of the first portions 220a, the portion corresponding to the gap X1 is also crushed. Therefore, according to this embodiment, the load on the work rotor 220 can be reduced and the work can be performed at a higher speed.

The present invention has been described above with reference to the drawings, but the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention.

10...mounting part, 20...cultivation work part, 30...disk unit, 40...pressure work part, 50...field, 52...travel track, 100...farm implement, 110...top mast, 115...lower link connection part, 117...input shaft, 210...first main frame, 220...work rotor, 220a...first part, 220b...second part, 222...rotating shaft, 224...cultivation tines, 224a...first cultivating tines, 224b...second cultivating tines, 230...shield cover, 240...ground leveling member, 250...Compression rod, 260...Chain drive unit, 310...Second main frame, 320...Disc support unit, 330...Disc arm, 340...Disc, 340a...First disc, 340b...Second disc, 341...Concave surface, 410...Basket bracket, 420...Roller arm, 430...Angle adjustment mechanism, 440...Basket roller, 440a...Support member, 440b...Bar, 450...Scraper bracket, 460...Scraper

Claims (6)

A work rotor including a plurality of tilling tines arranged along an axial direction of a rotation shaft;
A plurality of disks disposed in front of the work rotor and rotatably supported on the work rotor;
An agricultural machine comprising :
The outermost tillage tines among the plurality of tillage tines are curved outward,
The outermost disk among the plurality of disks has a concave curved surface facing inward and is located outside the outermost tilling tine,
When the agricultural work machine moves forward, the rotation range of the tilling tines positioned at the outermost positions in a plan view overlaps with the rotation range of the disks positioned at the outermost positions,
The rotation range of each of the disks other than the disk located at the outermost position among the plurality of disks overlaps with the rotation range of any of the plurality of tilling tines in a front view,
An agricultural work machine, wherein the plurality of tilling tines and the plurality of discs are arranged so that a field is tilled without any gaps between the leftmost disc and the rightmost disc among the plurality of discs. The agricultural machine according to claim 1, in which the position from the field surface to the bottom end of the tilling tines and the position from the field surface to the bottom end of the disk are approximately the same. The agricultural machine according to claim 1 or 2, wherein the plurality of disks includes two or more disks arranged inside the outermost disk. The agricultural machine according to any one of claims 1 to 3, wherein the concave curved surface of the outermost disk faces diagonally forward with respect to the direction of travel. The agricultural machine according to any one of claims 1 to 4, wherein the concave surface of the outermost disk faces obliquely upward with respect to the direction of travel. The agricultural work machine according to any one of claims 1 to 5, wherein, in a front view, one of the outermost disks overlaps with a chain drive unit of the agricultural work machine.

Images