Agricultural working machine

Abstract

To provide an agricultural work machine to be mounted on a tractor, including a mechanism of effectively reducing jumping of soil to a lateral side ahead of the agricultural work machine.SOLUTION: An agricultural work machine 10 to be mounted on a tractor includes: a tillage part 40 rotatable with a central axis as the lateral direction; and front side plates 50, 50' installed toward the front side from both side lateral surfaces of the tillage part 40. The front side plates 50, 50' include body parts 51, 51' arranged in parallel in the front-back and vertical directions, and front side parts 52, 52' for forming a surface inclined to the inside in the longitudinal direction ahead of the body parts 51, 51'. The front side parts 52, 52' are set to bounce soil which is to jump out in the front lateral direction due to the rotation of the tillage part 40, and make it return to the inside in the longitudinal direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an agricultural work machine, and more particularly to an agricultural work machine that is attached to a tractor to perform tilling work. [Background technology]

[0002] There are many types of agricultural implements that are attached to tractors and perform tilling work by rotating tilling tines using the PTO power of the tractor. Patent Document 1 shows an example of such an agricultural implement. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-6082 A Summary of the Invention [Problem to be solved by the invention]

[0004] When an agricultural machine attached to a tractor tills a field, the force of the rotation of the tilling unit can cause some of the tilled soil to fly out from the front side of the machine body. This soil that flies out to the side can land on adjacent areas that have already been tilled, causing problems for subsequent work. In the case of a rotary machine, an example of subsequent work would be planting or sowing seeds after plowing.

[0005] In view of the above-mentioned problems, the present invention has an object to provide an agricultural work machine that is attached to a tractor and has a mechanism for effectively reducing soil flying out to the sides in front of the agricultural work machine. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objective, one representative agricultural work machine of the present invention is an agricultural work machine attached to a tractor, and comprises a tilling unit that can rotate around a central axis in the lateral direction, and front side panels that are installed facing forward from both side surfaces of the tilling unit, and the front side panels comprise a main body portion that is arranged parallel in the front-to-back and up-down directions, and a front side portion that forms a surface inclined inward in the left-right direction in front of the main body portion, and the front side panels are configured to repel soil that attempts to fly out forward and laterally due to the rotation of the tilling unit, and return it to the inside in the left-right direction.

[0007] Furthermore, one of the agricultural working machines of the present invention is characterized in that, in a standard working posture, the height position of the upper side of the front panel is set upward from the center of the tilling section in a range of 70% or more and 90% or less of the tilling radius of the tilling section. Furthermore, one of the agricultural working machines of the present invention is characterized in that, in a standard working posture, the fore-and-aft position of the front side surface of the front panel is set in a range of 1.5 to 2 times the tilling radius of the tilling section.

[0008] Furthermore, one of the agricultural working machines of the present invention is characterized in that it has side panels on both sides of the tilling section, and the front side panel has multiple mounting holes formed near the rear side for attaching it to the side panels, and is fixed to the side panels by directly abutting them. Furthermore, one of the agricultural working machines of the present invention is characterized in that the lateral distance from the main body portion to the inner end portion of the front side portion is set in the range of 10% or more and 20% or less of the tilling radius of the tilling part. Furthermore, one of the agricultural working machines of the present invention is characterized in that the front side panel is formed in an L-shape via a bent portion, and the bending angle of the bent portion is set in the range of 15° or more and 35° or less. Furthermore, one of the agricultural machines of the present invention is characterized in that, in a standard working posture, the folding portion is angled so that it moves downward and toward the front, and the angle is set in the range of 2° or more and 8° or less with respect to the vertical direction. Furthermore, one of the agricultural working machines of the present invention comprises a leveling body covering the rear side of the tilling section, and auxiliary side plates fixed to both side surfaces of the leveling body, the auxiliary side plates having a mounting surface attached to the leveling body and an inclined surface that inclines laterally inwardly from the mounting surface via a bent portion, the inclined surface being located forward of the leveling body, and the bent portion being formed approximately in the middle of the overall width of the auxiliary side plate when the extension direction of the bent portion is arranged vertically. Effect of the Invention

[0009] According to the present invention, in an agricultural work machine that is attached to a tractor to perform tilling work, it is possible to effectively reduce soil from flying out to the sides in front of the agricultural work machine. Problems, configurations and effects other than those described above will become apparent from the following embodiments. [Brief description of the drawings]

[0010] [Figure 1] 1 is a plan view showing one embodiment of an agricultural machine of the present invention. FIG. [Diagram 2] FIG. 1 is a left side view showing one embodiment of an agricultural machine of the present invention. [Diagram 3] FIG. 1 is a right side view showing one embodiment of an agricultural machine of the present invention. [Figure 4] FIG. 4 is a side view of the left front plate in one embodiment of the agricultural machine of the present invention. [Diagram 5] FIG. 4 is a top view of the left front plate in one embodiment of the agricultural machine of the present invention. [Figure 6] FIG. 4 shows schematic diagrams taken along the line AA in FIGS. 2 and 3, in which (a) is a diagram for explaining the function of the left front plate and (b) is a diagram for explaining the function of the right front plate. [Figure 7] 1A and 1B are diagrams showing an auxiliary side plate in one embodiment of the agricultural machine of the present invention, in which (a) is a side view and (b) is a top view. [Figure 8] FIG. 2 is a side view of a soil leveling body in one embodiment of the agricultural machine of the present invention. [Figure 9]1A and 1B are diagrams showing an example of attachment of an auxiliary side plate of an agricultural machine of the present invention, in which (a) shows a first attachment state and (b) shows a second attachment state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment for carrying out the present invention will be described.

[0012] Fig. 1 is a plan view showing one embodiment of the agricultural work machine of the present invention. Fig. 2 is a left side view showing one embodiment of the agricultural work machine of the present invention. Fig. 3 is a right side view showing one embodiment of the agricultural work machine of the present invention. Figs. 2 and 3 show a standard working posture during agricultural work. The standard working posture is the most usual posture for performing agricultural work.

[0013] 1 to 3 show an embodiment of a rotary working machine 10 as an agricultural working machine mounted on a tractor. The rotary working machine 10 mounted on a tractor performs tilling work using a tilling section 40 while moving the tractor forward. In the following description, the moving direction of the rotary working machine 10 is the forward direction. The left-right direction in FIG. 1 is the lateral direction (left-right direction) of the rotary working machine 10, and the up-down direction in FIG. 1 is the forward direction of the rotary working machine 10. The left-right direction in FIG. 2 is the forward direction of the rotary working machine 10, and the up-down direction in FIG. 2 is the up-down direction (height direction) of the rotary working machine 10. The right-right direction in FIG. 3 is the forward direction of the rotary working machine 10, and the up-down direction in FIG. 3 is the up-down direction (height direction) of the rotary working machine 10.

[0014] In the rotary working machine 10, a left frame pipe 13 is connected to the left side of a transmission case 12, and a left side plate 15 is fixed to the left end of the left frame pipe 13. Meanwhile, a right frame pipe 14 is connected to the right side of the transmission case 12, and a right side plate 17 is fixed to the right end of the right frame pipe 14. The left side plate 15 and the right side plate 17 are provided facing downward and extend to both ends of the side of the tilling shaft 41. A chain case 16 is attached to the left side plate 15 from the left end of the left frame pipe 13 to the left end of the tilling shaft 41, and is equipped with sprockets, a chain, etc. inside. In addition, a chain case guard 19 that covers the underside of the chain case 16 is attached by fixing members 102, 103 to prevent wear of the chain case 16 due to contact with the soil. An end cover member 20 is attached to the right side plate 17 at the position of the right end of the tilling shaft 41. Further, a front pipe 18 is provided on the front lower side of the transmission case 12, connecting the left side plate 15 and the right side plate 17 between each other.

[0015] A tilling section cover 22 is provided between the left side plate 15 and the right side plate 17 on the lower side of the transmission case 12, the left frame pipe 13, and the right frame pipe 14. The tilling section cover 22 is configured to cover the upper side of the tilling section 40. Furthermore, on the rear side of the tilling section cover 22, a ground leveling body 24 is attached to the tilling section cover 22 via a hinge 25, which is a connecting member, so as to be rotatable with a horizontal axis as a rotation axis toward the rear and lower side. As a result, the ground leveling body 24 covers the rear side of the tilling section 40. In addition, ground pressure adjustment means 26 are provided to connect the left and right frame pipes 13, 14 and the ground leveling body 24. Extension ground leveling bodies 29, 29' are provided at both ends of the ground leveling body 24 so that the ground leveling body can be extended. In addition, gauge wheels 27 are provided on the left and right sides of the front side of the tilling section 40. The left and right side covers 28, 28' are attached to the left side plate 15 and the right side plate 17, respectively, toward the rear, so as to cover the left and right side surfaces of the tilling section 40, respectively.

[0016] The tilling unit 40 is composed of a tilling shaft 41 having multiple tilling tines 42 (only one is shown in Figs. 2 and 3), and is rotatably installed between the left side plate 15 and the right side plate 17. The chain case 16 is installed on the left side of the tilling shaft 41, and the end cover member 20 is installed on the right side. The center of rotation of the tilling unit 40 is a central axis extending laterally.

[0017] The left front plate 50 is attached to the front of the left side plate 15 by a plurality of fixing members 101 such as bolts, and is disposed from the left side plate 15 toward the front. As a result, the front plate 50 covers (a part of the front side of) the left side surface of the tilling unit 40 and the left side surface further forward over a predetermined length. The front plate 50 is a plate-shaped member and includes a main body 51 and a front side 52. The main body 51 is disposed parallel in the front-rear and up-down directions (perpendicular to the rotation center axis of the tilling unit 40), but the front side 52 is configured with a surface that is inclined toward the inside in the left-right direction (toward the rotary work machine 10) at the bent portion 55. In addition, the lower side surface T3 includes an inclined portion T3b whose height increases toward the front. As a result, the lower end of the front side 52 is formed at a position higher than the lowest end portion T3a of the main body 51.

[0018] The right front plate 50' is attached to the front of the right side plate 17 with multiple fixing members 101 such as bolts, and is disposed facing forward from the right side plate 17. As a result, the front plate 50' covers (a part of the front side of) the right side of the tilling unit 40 and the right side further forward over a predetermined length. The front plate 50' is a plate-shaped member and includes a main body portion 51' and a front portion 52'. The front plate 50' is basically configured symmetrically with respect to the front plate 50. However, the vicinity of the attachment portion to the right side plate 17 is shaped to match the right side plate 17.

[0019] The mast 31 and the two lower arms 32 form the mounting portion 30 for the tractor, and these are used to mount the rotary work implement 10 to the rear of the tractor. The mast 31 is fixed to the transmission case 12. The lower arms 32 are fixed to the front pipe 18 at two locations, one on the left and one on the right.

[0020] The left side cover 28 is fixed to the rear side of the left side plate 15 via a plurality of fixing members 104 such as bolts. The right side cover 28' is fixed to the rear side of the right side plate 17 via a plurality of fixing members 104 such as bolts. The side covers 28, 28' are formed parallel in the front-rear and up-down directions (perpendicular to the rotation center axis of the tilling unit 40). In addition, an auxiliary side plate 60 (see FIG. 2) is fixed to the left side surface (left end side surface) of the land leveling body 24, and the auxiliary side plate 60 is located laterally inward from the left side cover 28. In addition, an auxiliary side plate 60' (see FIG. 3) is fixed to the right side surface (right end side surface) of the land leveling body 24, and the auxiliary side plate 60' is located laterally inward from the right side cover 28'.

[0021] PTO (Power Take Off) power output from the tractor is input from the input shaft 11 via a joint or the like, and is transmitted to the drive shaft in the left frame pipe 13 via a gear mechanism in the transmission case 12. From this drive shaft, the power is transmitted to the tilling unit 40 located under the tilling unit cover 22 via a first sprocket, a chain, and a second sprocket in the left chain case 16. The tilling unit 40 rotates the tilling tines 42 by rotating the tilling shaft 41 to perform tilling work. In Figs. 2 and 3, the tilling outer diameter 45 is the outer end portion around which the tip of the tilling tines 42 rotates, and its radius is shown as the tilling radius R. An example of the tilling radius R is 270 mm. The input shaft 11 is almost horizontal in a standard working position during work.

[0022] The rotation direction of the tilling claw 42 is counterclockwise as viewed from the left side of FIG. 2, as shown by the arrow in FIG. 2 and the direction in which the upper end P1 rotates from the back to the front. Since the tilling unit 40 is surrounded by the tilling unit cover 22 and the soil leveling body 24, when the tilling unit 40 rotates, the tilling claw 42 tills the soil in the field while stirring it. At this time, part of the soil in the field scooped out by the tilling claw 42 passes over the tilling shaft 41 and falls to the front, and is stirred again by the tilling claw 42. Some of the soil that tries to fall to the front tries to fly out to the front side of the rotary working machine 10 due to the momentum of the rotation of the tilling claw 42 and the curved shape of the tilling claw 42. However, by providing the front side plates 50, 50', the soil can be bounced inward, and the soil can be prevented from flying out to the front side or reduced.

[0023] FIG. 4 is a side view of the left front plate in one embodiment of the agricultural working machine of the present invention. FIG. 5 is a top view of the left front plate in one embodiment of the agricultural working machine of the present invention. The left direction in FIG. 4 is the front direction of the front plate 50, and the up-down direction in FIG. 4 is the up-down direction (height direction) of the front plate 50. The left direction in FIG. 5 is the front direction of the front plate 50, and the up-down direction in FIG. 5 is the left-right direction of the front plate 50. The up direction in FIG. 5 is the inside in the left-right direction of the rotary working machine 10. Note that FIGS. 4 and 5 assume a standard working posture of the rotary working machine 10 during agricultural work. The following description will be given on the assumption of this posture. During work, the working posture may be tilted forward or backward from the standard working posture, but the standard working posture is a standard posture during work that is assumed in advance for that model.

[0024] The front plate 50 is formed with an upper side surface T1, a front side surface T2, a lower side surface T3, and a rear side surface T4 around its periphery. At the intersections of these surfaces, corners can be rounded or otherwise processed. In addition, the front portion 52 is formed from the main body portion 51 via a bent portion 55. As a result, the front plate 50 is formed into an overall dogleg shape.

[0025] The upper side surface T1 of the front panel 50 is the upper end of the main body portion 51 and the front portion 52, and is formed almost horizontally. The height position of the upper side surface T1 is set higher than the cultivation center C shown in FIG. 2, and is set, for example, in a range of 70% to 90% of the cultivation radius R upward from the cultivation center C. In addition, the height of the upper side surface T1 is set to be almost the same height as or higher than the front end portion 22a of the cultivation section cover 22. As shown in FIG. 2, when viewed from the side, the upper side surface T1 is positioned so as to almost overlap the front end portion 22a.

[0026] The front side surface T2 of the front plate 50 corresponds to the front end side surface of the front portion 52. The front-to-rear position of the front side surface T2 is set to a position sufficiently forward of the front end portion P2 of the tilling outer diameter 45 shown in FIG. 2. For example, it may be positioned 1.5 times or more, or even 1.7 times or more forward of the tilling radius R from the tilling center C. In order to avoid interference with other parts, it is preferable that the front-to-rear position of the front side surface T2 is less than twice the tilling radius R from the tilling center C. In addition, the front side surface T2 can be configured vertically, but may also be slightly inclined from the vertical in parallel with the bent portion 55 described later.

[0027] The lower side surface T3 of the front plate 50 is composed of a bottom end T3a and an inclined portion T3b. The bottom end T3a is the lowest part of the front plate 50, and is formed almost horizontally on the rear side portion of the lower side surface T3 (the portion on the left side plate 15 side). The height of the bottom end T3a is formed within a range of 20% or less of the tilling radius R, or even within a range of 10% or less, upward from the lower end of the chain case 16 or the chain case guard 19. Alternatively, the height of the bottom end T3a is set below the tilling center C, within a range of 40% to 60% of the tilling radius R. The front-to-rear position of the front end of the bottom end T3a can be up to the vicinity of the tilling outer diameter 45.

[0028] The inclined portion T3b is formed by inclining upward at an angle α1 with respect to the horizontal (lowest end T3a) from the front end of the lowest end T3a toward the front side. The angle α1 is set, for example, in the range of 20° to 40° with respect to the horizontal, and further in the range of 25° to 35°. As a result, the lower end Q of the front side surface T2 has a height distance d1 from the lowest end T3a, and forms a sufficient space below the front part 52 during agricultural work. The distance d1 is set, for example, in the range of 40% to 60% of the tilling radius R. Also, the lower end Q is formed near the tilling center C or at a position higher than that, as shown in FIG. 2.

[0029] The rear side surface T4 of the front plate 50 is the rear end side surface of the main body portion 51, and is located near the side surface of the tilling portion 40. The rear side surface T4 is composed of an upper portion T4a, a recessed portion T4b, and a lower portion T4c from the top. The upper portion T4a is shaped to follow the front side surface of the chain case 16 as shown in FIG. 2, and is formed in a straight line that is slightly inclined from vertical to match the inclination of the chain case 16. The recessed portion T4b is formed in a concave shape recessed forward so as to avoid the mounting portion of the fixing member 102 of the chain case guard 19. The lower portion T4c is shaped to follow the front side surface of the chain case guard 19, and is formed in a straight line that is inclined toward the rear as it goes downward.

[0030] The position of the bent portion 55 in the front-rear direction is located at least forward of the tilling outer diameter 45 when viewed from the side as shown in Fig. 2. Furthermore, the position of the bent portion 55 in the front-rear direction is set forward of the tilling center C, in a range of 130% to 170% of the tilling radius R, and further in a range of 140% to 160%.

[0031] The bending angle of the bending portion 55 is the angle indicated by β in Fig. 5, which is an angle at which the bending portion 55 is inclined laterally inward with respect to the front-rear plane. The range of this angle is set, for example, from 15° to 35°, or even from 20° to 30°. For example, a shallow angle of about 5° makes it easier for soil to come out. Also, an angle of 40° or more makes it easier for debris in the field to get caught, resulting in the debris being dragged.

[0032] The direction in which the bent portion 55 is formed can be vertical, but it may also be angled so that it slopes slightly downward from the vertical and toward the front. This causes the inner surface of the front portion 52 to face slightly downward, making it easier for soil that hits the front portion 52 to fall off. This angle is shown as angle α2 in Fig. 4, and is set, for example, in the range of 2° to 8°, or further in the range of 4° to 6°.

[0033] 5, the lateral distance d2 from the main body 51 to the inner end of the front portion 52 is set, for example, in the range of 10% to 20% of the tilling radius R. The front-to-rear distance d3 of the front portion 52 is set, for example, in the range of 20% to 40% of the tilling radius R, or further in the range of 25% to 35%.

[0034] The mounting holes 56 shown in FIG. 4 are formed vertically in a predetermined range from the upper side near the rear end of the front plate 50. The mounting holes 56 are formed along the upper portion T4a, and a plurality of mounting holes 56 are formed near the upper portion T4a. In this embodiment, three examples are shown. The front plate 50 can be attached to the left side plate 15 by directly abutting the front plate 50 and the left side plate 15 and passing a fixing member 101 such as a bolt through the mounting holes 56 and a hole formed near the front side of the left side plate 15. In this case, since no intermediate object such as a spacer is interposed between the front plate 50 and the left side plate 15, the front plate 50 can be attached at approximately the same lateral position as the left side plate 15.

[0035] The right front plate 50' is attached to the right side plate 17 in a shape symmetrical to the left front plate 50. As a result, the front part 52' is folded inward at the folding part 55'. These configurations are the same as those of the front part 52 and the folding part 55. However, the shape corresponding to the rear side surface T4 of the left front plate 50 is formed in the right front plate 50' in a shape that matches the right side plate 17 and the end cover member 20.

[0036] 2 and 3, (a) is a diagram for explaining the function of the left front plate, and (b) is a diagram for explaining the function of the right front plate. The up direction in Fig. 6 is the front direction of the rotary work machine 10, and the left and right direction in Fig. 6 is the left and right direction of the rotary work machine 10.

[0037] In FIG. 6, arrows S and S' indicate soil flows that are thrown forward from the top of the tilling unit 40 in a lateral outward direction. On the left side of FIG. 6(a), the leftmost soil flow s1 attempts to fly outward to the left, but is repelled inward by the main body 51 of the front plate 50. Furthermore, the second soil flow s2 from the left is slightly forward of the front end of the front part 52 of the front plate 50, and therefore indicates soil flows that fly forward. However, the soil between s1 and s2 bounces off the front part 52 and does not fly outward. The bounced soil returns to the tilling unit 40 as the tractor moves forward.

[0038] If the inclined front side portion 52 is not provided, the main body portion 51 needs to be extended by the length of P in Fig. 6(a) in order to obtain the same effect of preventing soil from flying. This extension length needs to be about twice the length of the front side portion 52 in the front-to-rear direction compared to when the front side portion 52 has a bending angle of 20°.

[0039] On the right side of FIG. 6(b), the front plate 50' acts in a similar manner on the soil S' that is about to fly outward to the front right.

[0040] Fig. 7 shows an auxiliary side plate in one embodiment of the agricultural work machine of the present invention, where (a) shows a side view and (b) shows a top view. The auxiliary side plate 60 shown in Fig. 7 is the left auxiliary side plate. In actual installation, the inclination differs depending on the installation state, but Fig. 7 shows a case where the extension direction of the bent portion 63 of the auxiliary side plate 60 is the vertical direction. The left direction in Fig. 7 corresponds to the front direction of the rotary work machine 10.

[0041] The auxiliary side plate 60 is a plate-like member and has a mounting surface 61 and an inclined surface 62. The mounting surface 61 is arranged parallel to the front-rear and up-down directions (perpendicular to the rotation center axis of the tilling unit 40), and the inclined surface 62 is formed in front of the mounting surface 61. The inclined surface 62 is bent at a bending portion 63 and is configured by a surface that is inclined toward the inside in the lateral direction. Four holes, namely mounting holes 65, 66, 67, and 68, are formed in the mounting surface 61. These holes are for mounting to the side of the land leveling body 24, and the mounting holes 65 and 66 are used in the first mounting state, and the mounting holes 67 and 68 are used in the second mounting state. For this reason, the pitch of the mounting holes 65 and 66 is the same as that of the mounting holes 67 and 68. In the example of FIG. 7, the mounting holes 65 and 66 are provided near the center of the mounting surface 61 in the front-rear direction, and the mounting holes 67 and 68 are provided near the rear of the mounting surface 61. The mounting holes 65, 66, 67, and 68 may be countersunk holes for receiving flat head bolts or the like.

[0042] The bent portion 63 will be described. As shown in FIG. 7(b), the bent portion 63 is located in the middle of the overall width direction (left and right direction in FIG. 7) when the direction in which the bent portion 63 extends is the vertical direction (up and down direction in FIG. 7(a)). Specifically, the bent portion 63 is provided within a range of a central width direction length E sandwiched between a range of a predetermined width direction length F from both ends. Here, for example, F is a quarter length and E is a half length of the entire length of the auxiliary side plate 60 in the overall width direction. This allows the inclined surface 62 to be provided in a range of a predetermined value or more, which contributes to the effect described later. The bending angle of the bent portion 63 can be an appropriate angle, for example, 2° to 20°.

[0043] The right auxiliary side plate 60' (see FIG. 3) may be configured to have a symmetrical shape with respect to the left auxiliary side plate 60.

[0044] Fig. 8 shows a side view of a ground leveling body in one embodiment of the agricultural work machine of the present invention. Fig. 9 shows an example of the attachment of the auxiliary side plate of the agricultural work machine of the present invention, (a) shows a first attachment state, and (b) shows a second attachment state. Fig. 9 shows a view in which the side cover 28 is omitted from Fig. 2 in order to explain the attachment state of the auxiliary side plate 60.

[0045] As shown in Fig. 8, side plates 24a are provided on both sides of the ground leveling body 24. The side plates 24a are formed on surfaces perpendicular to the left-right direction along the shape of the ground leveling body 24. Four mounting holes 241, 242, 243, and 244 are provided on the side plates 24a. The mounting holes 241 and 242 are used in a first mounting state described below, and the mounting holes 243 and 244 are used in a second mounting state described below. The mounting holes 243 and 244 are formed at a lower position than the mounting holes 241 and 242.

[0046] In the first mounting state shown in FIG. 9(a), the auxiliary side plate 60 is fixed to the left side plate 24a of the ground leveling body 24 by the fixing member 105 (for example, a bolt such as a flat head bolt). Here, the mounting holes 241 and 242 of the ground leveling body 24 and the mounting holes 65 and 66 of the auxiliary side plate 60 are used. In this first mounting state, the auxiliary side plate 60 protrudes less forward than the ground leveling body 24, but the inclined surface 62 is located forward of the ground leveling body 24 and inclined toward the inside (the center side in the left-right direction). In the second mounting state shown in FIG. 9(b), the auxiliary side plate 60 is fixed to the left side plate 24a of the ground leveling body 24 by the fixing member 105 at a position different from that in the first mounting state. Here, the mounting holes 243 and 244 of the ground leveling body 24 and the mounting holes 67 and 68 of the auxiliary side plate 60 are used. In this second mounting state, the amount of protrusion forward from the ground leveling body 24 is greater than in the first mounting state. More than half of the mounting surface 61 and the inclined surface 62 are located forward from the ground leveling body 24, and the inclined surface 62 is inclined inward (toward the center in the left-right direction). In addition, the height direction of the auxiliary side plate 60 in the second mounting state is fixed at a lower position than in the first mounting state. These can be changed to an appropriate mounting position depending on the usage environment, for example, Fig. 9(a) is a field and Fig. 9(b) is a paddy field. In addition, the auxiliary side plate 60' can be fixed to the right side surface of the ground leveling body 24 in the same way as the auxiliary side plate 60.

[0047] (effect) In this embodiment, by providing the front side panels 50, 50' on both sides of the rotary working machine 10, soil flying from the front side is reduced. This does not interfere with subsequent work such as planting. Furthermore, by preventing the soil from spilling out, the soil is handed over more smoothly in the tilling section 40 during tilling, and the soil crushing performance of the rotary working machine 10 can be improved.

[0048] Furthermore, by bending the front parts 52, 52' of the front plates 50, 50' inward at a specified angle, the amount of forward protrusion of the front plates 50, 50' can be reduced, preventing interference with other members and reducing soil splattering. At that time, by bending the front parts 52, 52' so that their faces face slightly downward, soil is more likely to bounce back downward.

[0049] Furthermore, by raising the front lower ends of the front parts 52, 52' of the front panels 50, 50' and providing space below, it is possible to reduce the above-mentioned soil flying while reducing the chance of debris getting caught.

[0050] Furthermore, by setting the size and position of the front side plates 50, 50' within the above-mentioned ranges, it is possible to effectively reduce soil flying. Also, by directly fixing the front side plates 50, 50' to the left side plate 15 and the right side plate 17, soil that hits the front side plates 50, 50' can be smoothly returned to the tilling section 40 without protruding laterally.

[0051] Furthermore, by providing the auxiliary side plates 60, 60', the area covering both sides of the ground leveling body 24 can be increased. At this time, by using the bent portion 63, the strength of the auxiliary side plates 60, 60' can be increased and deformation due to impact from stones or the like can be prevented. Furthermore, the inclined surface 62 is inclined in a direction to avoid the fixing member 104 (the portion where the tip of the bolt protrudes inward) that fixes the side covers 28, 28', so interference with the fixing member 104 can be prevented. Furthermore, the inclined surface 62 expands the space between the side covers 28, 28', so that deterioration of the movement of the ground leveling body 24 due to clogging of soil between the side covers 28, 28' and the auxiliary side plates 60, 60' can be prevented or reduced.

[0052] As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above-mentioned embodiments, and various modified examples other than those described above are also included. For example, the present invention is not limited to those having all the configurations provided in the above-mentioned embodiments. In addition, it is also possible to delete part of the configuration of a certain embodiment or replace it with another configuration.

[0053] For example, although an embodiment of a rotary working machine has been shown as an example of an agricultural working machine, the present invention is not limited to this and can be applied to an agricultural working machine that is attached to a tractor having a tilling unit, such as a tilling machine.

[0054] Also, the front side portions 52, 52' are shown to have a planar shape folded at the folding portions 55, 55'. This allows for easy processing, but the shape is not limited to this as long as the surface facing inward is formed. For example, it may have a curved shape when viewed from above. In this case, by satisfying the distance d2 in FIG. 5, it is possible to achieve the same effect as the above configuration.

[0055] In addition, the inclined portion T3b of the front plate 50, the front plate 50' is shown as a straight line in the above embodiment, but may be formed as a curved line or a combination of a straight line and a curved line. Alternatively, instead of the inclined portion T3b, a curved line connecting the front side surface T2 and the lowermost end portion T3a may be used.

[0056] Furthermore, left side plate 15 has been described as a separate member from chain case 16, but left side plate 15 and chain case 16 may be integrated together, with part of chain case 16 fulfilling the role of left side plate 15.

[0057] Also, a method of changing the position of the mounting hole of the side plate 24a of the ground leveling body 24 when changing the mounting state by the auxiliary side plates 60, 60' has been described. However, this is not limited to this, and the mounting hole of the side plate 24a of the ground leveling body 24 may be left the same, and only the position of the hole of the auxiliary side plates 60, 60' may be changed to change the overall mounting position. [Explanation of symbols]

[0058] 10 Rotary work machine 12 Transmission case 13 Left frame pipe 14 Right frame pipe 15 Left side plate 16 Chain case 17 Right side plate 19 Chain case guard 20 End cover member 22 Tillage section cover 22a Front end 24 Land leveling body 24a side plate 28, 28' Side Cover 40 Cultivation Department 41 Cultivation axis 42 Cultivating Claw 45 Tillage outer diameter 50, 50' Front side plate 51, 51' Main body 52, 52' Front side 55, 55' bent part 56 Mounting hole 60, 60' Auxiliary side plate 61 Mounting surface 62 Slope 63 Bending section 65, 66, 67, 68 Mounting holes 241, 242, 243, 244 Mounting holes T1 Upper side T2 Anterior side T3 lower side T3a Bottom end T3b slope part T4 rear side T4a Upper part T4b recess T4c Lower Part 101, 102, 103, 104, 105 Fixing members

Claims

1. An agricultural machine to be attached to a tractor, The tilling unit has a rotatable central axis in the lateral direction, and front side plates are respectively installed forward from both side surfaces of the tilling unit, The front side plate includes a main body portion disposed parallel to the front-rear and up-down directions, and a front side portion forming a surface inclined inwardly in the left-right direction in front of the main body portion, An agricultural machine characterized in that the front side plate is configured to bounce back soil that tends to fly out laterally forward due to rotation of the tilling unit and return it to the inside in the left-right direction.

2. The agricultural machine according to claim 1, An agricultural work machine characterized in that, in a standard working posture, the height position of the upper side of the front panel is set upward from the center of the tilling section in a range of 70% or more and 90% or less of the tilling radius of the tilling section.

3. In the agricultural machine according to claim 1 or 2, An agricultural work machine characterized in that, in a standard working posture, the fore-and-aft position of the front side surface of the front panel is set in a range of 1.5 to 2 times the tilling radius of the tilling section.

4. In the agricultural machine according to any one of claims 1 to 3, An agricultural work machine characterized in that it has side panels on both sides of the tilling section, and the front side panel has a plurality of mounting holes formed near the rear side for attaching it to the side panels, and is fixed to the side panels by directly abutting them.

5. In the agricultural machine according to any one of claims 1 to 4, An agricultural machine characterized in that the lateral distance from the main body portion to the inner end portion of the front side portion is set in the range of 10% to 20% of the tilling radius of the tilling part.

6. In the agricultural machine according to any one of claims 1 to 5, The agricultural machine according to the present invention is characterized in that the front side panel is formed in an L-shape via a bent portion, and a bending angle of the bent portion is set in the range of 15° or more and 35° or less.

7. The agricultural machine according to claim 6, The agricultural machine is characterized in that, in a standard working posture, the bent portion is angled so that it approaches the front as it goes downward, and the angle is set in a range of 2° or more and 8° or less with respect to the vertical direction.

8. In the agricultural machine according to any one of claims 1 to 7, The tiller includes a leveling body that covers the rear side of the tilling unit, and an auxiliary side plate that is fixed to both side surfaces of the leveling body, The auxiliary side plate has a mounting surface that is attached to the ground leveling body and an inclined surface that is inclined laterally inwardly with respect to the mounting surface via a bent portion, The inclined surface is located forward of the leveling body, The agricultural machine is characterized in that the bent portion is formed in the middle of the overall width of the auxiliary side panel when the extending direction of the bent portion is arranged vertically.

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