Agricultural machine

Abstract

To provide an agricultural machine capable of discharging mud inside a protective body.SOLUTION: An extended working unit 12 of an agricultural machine includes an extended tilling body 42 for performing tilling work and an extended land-leveling body 43 for performing leveling work. Further, the extended working unit 12 includes a support body 63 that rotatably supports the extended tilling body 42, and a protective cover 64 that protects the support body 63. Furthermore, the extended working unit 12 includes a mud discharge port 65 for discharging mud inside the protective cover 64, where the mud discharge port 65 is comprised of a mud discharge notch 66 provided at a lower end part of the support body 63.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an agricultural machine. [Background technology]

[0002] BACKGROUND ART Conventionally, an agricultural work machine such as that described in Patent Document 1 below is known.

[0003] This conventional agricultural machine is connected to a vehicle such as a tractor, and is equipped with a tilling body that performs tilling work, a leveling body that performs ground leveling work behind the tilling body, a support body that supports the tilling body, and a protective body (end cover) that protects the support body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-201444 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the above-described conventional agricultural work machine, depending on the soil quality of the field, for example, mud (muddy water) that has entered the protective body may not be discharged and may accumulate inside the protective body.

[0006] Therefore, one of the objects of the embodiments of the present invention is to provide an agricultural work machine that can discharge mud inside a protective body. [Means for solving the problem]

[0007] An agricultural working machine according to an embodiment of the present invention comprises a tilling body that performs tilling work, a leveling body that performs leveling work behind the tilling body, a support body that supports the tilling body, a protective body that protects the support body, and a mud discharge outlet portion provided on at least one of the support body and the protective body for discharging mud from within the protective body. [Effects of the Invention]

[0008] According to the embodiment of the present invention, mud inside the protective body can be discharged. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view of an agricultural work machine according to one embodiment of the present invention (an agricultural work machine in an unfolded state with an extended working section in an unfolded working state). FIG. [Figure 2] FIG. 2 is a side view of the same agricultural work machine (in a folded state with the extended working section folded and in a non-working state). [Figure 3] FIG. 2 is a plan view of the same agricultural work machine (the agricultural work machine in an unfolded state with the extended work section in the unfolded working state) (including a rear view showing a part of the rear wheels of the tractor). [Figure 4] FIG. 2 is a partially exploded perspective view of the extension working part of the agricultural work machine. [Figure 5] FIG. [Figure 6] 4 is a schematic cross-sectional view of a portion AA in FIG. 3 (a partial schematic cross-sectional view of an extension working portion). [Figure 7] FIG. 10 is a view showing the state of the inside of the protective cover of the extension work unit when being cleaned. [Figure 8] FIG. 10 is a partial schematic cross-sectional view of an extension working unit of an agricultural work machine according to another embodiment of the present invention. [Figure 9] FIG. 10 is a partial schematic cross-sectional view of an extension working unit of an agricultural work machine according to yet another embodiment of the present invention. [Figure 10] FIG. 10 is a partial schematic side view of an extension working unit of an agricultural work machine according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to FIGS.

[0011] In Figures 1 to 3, 1 is an agricultural work machine, and this agricultural work machine 1 is connected to the rear of a tractor 2, which is a vehicle that can travel on a field, for example, and is a plow machine that moves forward (in the direction of travel) on the field as the tractor 2 travels, performing a specified agricultural work, such as plowing or leveling the ground (plowing work).

[0012] The tractor 2 comprises a tractor body (not shown), with left and right front wheels (not shown) at the front and left and right rear wheels (tires, crawlers, etc.) 5 at the rear. A three-point link (agricultural implement lifting device) (not shown) is provided at the rear end of the tractor body, and the agricultural implement 1 is detachably connected to this three-point link.

[0013] When working with the agricultural implement 1 connected to the three-point link at the rear of the tractor 2, the left and right rear wheels (traveling means) 5 are driven and rotated by the power of the engine mounted on the tractor body, and the tractor 2 travels on the field. As the rear wheels 5 pass by, a concave groove (a groove left by the travelling vehicle) 6 and convex mounds of soil 7 on both sides of it are formed in the field (see Figure 3).

[0014] The agricultural work machine 1 is, for example, a folding work machine with a foldable three-part structure, and is equipped with a central work unit 11 that is detachably connected to a three-point link section at the rear of the tractor 2 and is a work unit that performs at least tilling and leveling work (plowing work), left and right extension work units 12 that are provided at both left and right ends of the central work unit 11 and can rotate up and down around a rotation center axis (rotation fulcrum) 10 and perform at least tilling and leveling work (plowing work), and cylinders (electric hydraulic cylinders, hydraulic cylinders, etc.) 13 that are left and right rotation drive means that rotate the extension work units 12 up and down around the rotation center axis 10 relative to the central work unit 11.

[0015] Each of the left and right extension working units (left and right working units that are symmetrical to each other) 12 is placed in an unfolded working state by rotating in one direction (approximately 180 degrees in the opening direction) based on the extension and retraction action of the extendable cylinder 13, and is placed in a folded non-working state by rotating in the other direction (approximately 180 degrees in the closing direction).

[0016] Therefore, the agricultural work machine 1 can be selectively switched (set) between a state in which work (plowing or soil-pulling) is performed using only the central work unit 11, a state in which work is performed using the central work unit 11 and both the left and right extension work units 12, and a state in which work is performed using the central work unit 11 and either the left or right extension work unit 12.

[0017] The central working unit 11 comprises a central body 16, which is a machine that is detachably connected to the three-point link section at the rear of the tractor 2, a central tilling body 17, which is a tilling body that is rotatably mounted on the central body 16 and performs tilling work while rotating in a predetermined direction (down-cut direction), and a central leveling body 18, which is a leveling body that is rotatably mounted on the central body 16 in the vertical direction and performs leveling work behind the central tilling body 17.

[0018] The central machine body 16 has a central tillage cover (cover body) 20, which is a tillage cover that is approximately plate-shaped and convex upward and covers the upper part of the central tillage body 17, and the central tillage body 17 performs tilling work while rotating with its upper part covered by the central tillage cover (tilling cover part) 20.

[0019] The central body 16 has a three-point connection part 21 that is detachably connected (attached) to the three-point link part at the rear of the tractor 2, for example via a coupler, and this three-point connection part 21 is composed of a top mast 23 that holds a top pin 22 and left and right lower arms 25 that hold lower pins 24.

[0020] The central body 16 also has a transmission case section 27, which is a shaft holding section that rotatably holds an input shaft 26 that is connected to the PTO shaft of the tractor 2 via a joint, and the inner ends of frame pipe sections 28, which are frame sections that are longitudinal in the left-right direction, are attached to both the left and right sides of this transmission case section 27.

[0021] A chain case 29, which is a roughly box-shaped support part (one-side tillage unit support part), is attached to the outer end (left end) of the left-side frame pipe part 28. A bracket part (not shown), which is a roughly plate-shaped support part (the other-side tillage unit support part), is attached to the outer end (right end) of the right-side frame pipe part 28. The central tillage unit 17 is rotatably supported by the chain case 29 and the bracket part, which are left and right supports that are spaced apart and facing each other.

[0022] The central tilling body 17 has a tilling shaft 31, which is a rotating shaft elongated in the left-right direction that rotates in a predetermined direction based on power from the input shaft 26, and a plurality of tilling tines 32 are detachably attached to this tilling shaft 31. The upper part of the central tilling body 17 is covered by a central tilling cover 20 of the central machine body 16. Note that an engaging member (one-side clutch) 33 for power transmission is provided at both left-right ends (outer left and right ends) of the tilling shaft 31 of the central tilling body 17.

[0023] The central leveling body 18 has a first leveling member (leveling plate) 36 that is rotatable in the vertical direction at the rear end of the central tillage cover 20 of the central body 16, and a second leveling member (rake) 37 that is rotatable in the vertical direction is provided at the lower end of this first leveling member 36.

[0024] The extended working unit 12 comprises an extended body 41, which is a machine body that is rotatable in the vertical direction around a rotation center axis (rotation fulcrum) 10 at both left and right ends of the central body 16; an extended tilling body 42 that is rotatably mounted on the extended body 41 and that performs tilling work by rotating in a predetermined direction (down-cutting direction) together with the central tilling body 17 when the extended working unit 12 is in the extended working state; and an extended soil leveling body 43 that is rotatably mounted on the extended body 41 in the vertical direction and that performs soil leveling work behind the extended tilling body 42 together with the central soil leveling body 18 when the extended working unit 12 is in the extended working state.

[0025] The extension body 41 has an extension tillage cover (cover body) 45, which is a tillage cover that is approximately plate-shaped and convex upward, and covers the upper part of the extension tillage body 42 when in the extended working state, and the extension tillage body 42 performs tillage work while rotating with the upper part covered by the extension tillage cover (tilling cover part) 45.

[0026] The extension tilling body 42 has a tilling shaft 46, which is a rotating shaft elongated in the left-right direction and rotates in a predetermined direction based on power from the central tilling body 17 side, and a plurality of tilling tines 47 are removably attached to this tilling shaft 46. The upper part of the extension tilling body 42 is covered by an extension tilling cover 45 of the extension body 41. In addition, an engagement member (other-side clutch) 48 for power transmission is provided at the inner end of the tilling shaft 46 of each of the left and right extension tilling bodies 42, which is removably engaged with the engagement member 33 of the central tilling body 17.

[0027] The extended ground leveling body 43 has a first ground leveling member (leveling plate) 51 that is rotatable in the vertical direction at the rear end of the extended tillage cover 45 of the extended body 41, and a second ground leveling member (rake) 52 that is rotatable in the vertical direction is provided at the lower end of this first ground leveling member 51.

[0028] An extension rake 53 is provided at the outer end of the second ground leveling member 52, and this extension rake 53 can be selectively switched by an extension rake switching section (opening / closing unit) 55 between an extended working state and a folded non-working state.

[0029] In Figure 3, 56 is a work state switching unit (earth-pulling unit) for selectively switching the ground leveling bodies 18, 43 between a ground leveling work state (ground leveling work state for plowing) and an earth-pulling work state, and by switching the ground leveling bodies 18, 43 to the earth-pulling work state by this work state switching unit 56, the agricultural work machine 1 enters an earth-pulling state in which earth-pulling work is possible. Also, 57 is a ground leveling body biasing unit (pressure unit) for biasing the ground leveling bodies 18, 43 downward.

[0030] On the other hand, the agricultural implement 1 is equipped with left and right track erasers 58 that can guide the soil (mud in the field containing miscellaneous materials such as straw and grass) in the soil mound 7 of the field toward the concave groove 6 and erase the tracks of both rear wheels 5.

[0031] Each of the left and right travel mark erasing sections 58 has a plate-shaped outer soil-removing body 59 that moves the soil from the mounded section 7 on the outside of the rear wheels 5 of the tractor 2 toward the groove section 6, and a plate-shaped inner soil-removing body 60 that moves the soil from the mounded section 7 on the inside of the rear wheels 5 toward the groove section 6.

[0032] Here, as shown in Figures 4 to 6, the extension body 41 of the extension working unit 12 is removably attached to the cover side plate portion 44 of the extension tillage cover 45 with mounting fixtures (e.g., bolts and nuts) 61, and has a support body 63 that rotatably supports the tillage shaft 46 of the extension tillage body 42, and a protective cover 64 that is removably attached to this support body 63 with mounting means 62a, 62b and is an approximately thin box-shaped protective body that protects the support body 63.

[0033] In addition, this extension body 41 has a mud discharge outlet portion (an opening dedicated to removing mud) 65 for discharging mud inside a protective cover 64 that is approximately a thin box and covers the outer surface (outer face) of the support body 63, i.e., mud (muddy water) that has entered the protective cover 64 during, for example, tillage work, outside the protective cover 64.

[0034] The mud discharge port 65 is provided in at least one of the support body 63 and the protective cover 64, i.e., for example, only the support body 63. In other words, the mud discharge port 65 has only a downward-opening mud discharge cutout 66 that is recessed and opens downward in the middle part in the front-to-rear direction of the lower end of the support body 63 (for example, approximately the center part in the front-to-rear direction). In other words, the mud discharge port 65 is composed only of the downward-opening mud discharge cutout 66 that communicates with the lower part of the inner space 68 inside the protective cover 64.

[0035] The mounting means 62a is made up of, for example, a high nut (fixing nut) 71 welded and fixed to the inside surface (inner surface) of the protective cover 64, and a bolt 73 inserted into a mounting hole 72 and removably screwed onto the high nut 71. The mounting means 62b is made up of, for example, a normal nut 74 and a bolt 77 inserted into mounting holes 75 and 76 and removably screwed onto the nut 74.

[0036] In the drawing, 78 denotes a bolt for a pivot point, and the first ground leveling member 51 rotates up and down around this pivot point bolt 78. In addition, in the drawing, 79 denotes a restricting device (for example, a bolt and a high nut) that restricts the downward rotation of the first ground leveling member 51.

[0037] The support body 63 has a vertical side plate 81 whose upper end is detachably attached to the cover side plate portion 44, and a support member 82 which is a support portion that rotatably supports the outer end of the tillage shaft 46, and the support member 82 is detachably attached to approximately the center of the side plate 81 with mounting fixtures (for example, bolts and nuts) 83. It is also possible to not have the cover side plate portion 44, and for the side plate 81 to be welded and fixed to the extended tillage cover 45.

[0038] The support member 82 has, for example, a flange 85 and a boss 86, and this boss 86 rotatably supports the outer end of the tillage shaft 46 via a bearing (not shown). The outer end surface of the tillage shaft 46 of the extended tillage body 42 is covered with a rubber plug 87 that is detachably attached to the boss 86 to prevent oil leakage and the intrusion of water and mud.

[0039] Furthermore, in the middle portion of the lower end of the flat side plate 81 covering the outer side of the extended tillage body 42 in the fore-and-aft direction, i.e., approximately in the center portion in the fore-and-aft direction, a mud discharge cutout portion 66 for discharging mud from inside the protective cover 64 is formed as a concave cutout opening downward, and the mud discharge outlet portion 65 is formed solely by this cutout portion 66.

[0040] The side plate 81 has at its lower end a vertical first portion 91 located facing the front end of the cutout 66, a sloping second portion 92 that is high in front and low in rear located facing the rear end of the cutout 66, and a horizontal third portion 93 located facing the upper end of the cutout 66. Because the second portion 92 is formed in a sloping shape that is high in front and low in rear, debris in the mud (such as straw or grass) is less likely to get caught on the sloping second portion 92 during plowing work (for example, during rough tillage work with a deep plowing depth).

[0041] Furthermore, the mud discharge cutout 66 is longitudinally oriented in the front-to-rear direction and is located below the tillage shaft 46 in a side view. The front-to-rear length dimension A of this cutout 66 is shorter than the front-to-rear length dimension B of the lower end of the protective cover 64 (the front-to-rear length dimension of the lower plate portion 100), and is preferably at least half of this dimension B. Furthermore, the first portion 91 of the side plate 81 is located forward of the center P of the tillage shaft.

[0042] The protective cover (end cover) 64 is made of, for example, a single plate-like member and has an attachment plate portion 96 that is detachably attached to the outer surface of the side plate 81, and a protective cover main body plate portion 97 that is integrally connected to this attachment plate portion 96, and this protective cover main body plate portion 97 covers and protects the boss 86, rubber stopper 87, mounting fixture 83, and part of the side plate 81, etc., to prevent wear.

[0043] The protective cover main body plate portion 97 is approximately in the shape of a thin box with an inner space 68 inside, and has an opposing plate portion 98 that faces the outer surface of the side plate 81 at a distance via the inner space 68, an upper plate portion 99 that is integrally connected to the upper end of the opposing plate portion 98, a lower plate portion 100 that is integrally connected to the lower end of the opposing plate portion 98, a front plate portion 101 that is integrally connected to the front end of the opposing plate portion 98, and a rear plate portion 102 that is integrally connected to the rear end of the opposing plate portion 98.

[0044] In addition, an upper opening portion 106 is formed between the rear end of the upper plate portion 99 and the upper end of the rear plate portion 102, and a lower opening portion 107 is formed between the rear end of the lower plate portion 100 and the lower end of the rear plate portion 102.

[0045] The lower plate portion 100 is located facing the lower end of the cutout portion 66, which is the mud discharge port portion 65, and therefore, in a side view, the cutout portion 66 is located within the first to third portions 91, 92, 93 and the lower plate portion 100. In the illustrated example, the rear end of the lower plate portion 100 is located slightly forward of the rear end of the second portion 92, but they may be configured to coincide in a side view, for example.

[0046] Next, the operation of the agricultural work machine 1 will be described.

[0047] For example, as shown in Figure 3, when the agricultural work machine 1 is in a plowed state with the left and right extension working units 12 in an extended working state, and moves forward in a field (for example, a flooded rice field) by the tractor 2, the central working unit 11 and the left and right extension working units 12 perform plowed work (plowing and leveling work).

[0048] In other words, the central tilling body 17 and the left and right extension tilling bodies 42 rotate in a predetermined direction to perform tilling work, and behind them, the central leveling body 18 and the left and right extension leveling bodies 43 perform ground leveling work.

[0049] Furthermore, even if mud (muddy water) from the field gets into the protective cover 64 during such plowing work (for example, during rough tilling work with a deep tillage depth), when the agricultural work machine 1 is raised from the water surface by the three-point linkage part of the tractor 2, the mud that has gotten into the protective cover 64 is discharged to the outside of the protective cover 64 through the cutout part 66, which is the mud discharge port part 65. In other words, most of the mud that has entered the inner space part 68 within the protective cover 64 is discharged to the outside of the protective cover 64 through the mud discharge cutout part 66 that communicates with the lower center side of the inner space part 68.

[0050] Furthermore, when cleaning after plowing work, as shown in Figure 7, for example, by inserting the tip of a water supply hose 110 into the protective cover 64 through the cutout 66 and supplying water while the agricultural work machine 1 is held in an upper position by the three-point linkage of the tractor 2, it is possible to flush away any mud remaining in the protective cover 64 and discharge it from the cutout 66, which is the mud discharge port 65, to the outside of the protective cover 64. The vertical length of the cutout 66 is such that, for example, a water supply hose 110 (with an outer diameter of about 20 mm, for example) can be inserted therethrough.

[0051] Therefore, with such an agricultural implement 1, mud that has entered the protective cover 64 during tillage work in the field can be easily and properly discharged outside the protective cover 64 from the mud discharge outlet 65, which is an opening dedicated to mud removal provided at the lower end of the side panel 81 of the support body 63 serving as a bracket part.

[0052] Therefore, for example, a worker performing cleaning can easily discharge and remove mud inside the protective cover 64 without removing the protective cover 64 from the side plate 81, thereby reducing the burden on the worker.

[0053] Furthermore, since the protective cover 64 is located at the outer end (outermost end), which is the left-right end of the agricultural work machine 1, if mud accumulates and hardens inside as in the past, the weight increases accordingly, which could cause problems that adversely affect maintaining a horizontal posture or the upward rotation of the extension work unit 11, but this agricultural work machine 1 can prevent such problems from occurring.

[0054] Furthermore, the mud discharge outlet 65 is composed only of a cutout 66 for mud discharge provided at the lower end of the side plate 81 of the support body 63, so it has a simple configuration and the mud discharge outlet 65 can be easily provided by simply cutting out a part of the side plate 81.

[0055] The mud discharge cutout 66 may be provided longitudinally on the front side of the lower end of the side plate 81 of the support body 63 so as to open not only downward but also forward, as shown in FIG.

[0056] 9, the mud discharge port 65 may be configured to have a mud discharge cutout 66 provided in the lower end of the side plate 81 of the support body 63, and a mud discharge elongated hole 112 provided in an extension plate portion 111 of the protective cover 64 so as to communicate with this cutout 66. In other words, the mud discharge port 65 shown in FIG. 9 is provided in both the support body 63 and the protective cover 64. The extension plate portion 111 is extended by bending or welding to a lower plate portion 100 of the protective cover main body plate portion 97 so as to face closely to the inner surface of the side plate 81.

[0057] Furthermore, the mud discharge port 65 may consist only of a mud discharge cutout 113 provided at the lower end of the protective cover 64, as shown in Fig. 10. In other words, the mud discharge port 65 shown in Fig. 10 is not provided in the support body 63, but only in the protective cover 64.

[0058] On the other hand, the agricultural work machine is not limited to a folding work machine with a foldable three-part structure (a configuration having a central work section and left and right extended work sections), but may also be configured, for example, to have a work section connected to a traveling vehicle and an extended work section provided at only one of the left and right ends of the work section.

[0059] Furthermore, it may be a non-foldable configuration (such as a single harrow or rotary) that does not have both left and right extension working parts, but only has a working part that is connected to a running vehicle as a working part capable of tilling work.In this configuration, a protective body is attached to a support body (chain case part or bracket part) that rotatably supports the tilling body, and a mud discharge outlet part is provided on at least one of the support body and the protective body.

[0060] Furthermore, the leveling body (central leveling body, extended leveling body) that performs leveling work is not limited to one having a first leveling member and a second leveling member, but may, for example, have only the first leveling member, or may be configured such that the leveling body is attached to the rear end of the tilling cover (central tilling cover, extended tilling cover) via an elastic plate such as a rubber plate. [Explanation of symbols]

[0061] 1 Agricultural machinery 42 Extended tillage body, which is a tillage body 43 Extended leveling body that is a leveling body 63 Support 64 Protective cover 65 Mud discharge port 66 Notch 68 Inner space 81 Side panel

Claims

1. A tilling body that does the tilling work, A leveling body that performs leveling work behind the tilling body; A support body that supports the tillage body; a protector that protects the support; a mud discharge port portion provided on at least one of the support body and the protective body for discharging mud within the protective body; An agricultural machine characterized by comprising:

2. The protector has an inner space portion, The mud discharge port communicates with the lower part of the inner space.

2. The agricultural implement according to claim 1.

3. The mud discharge port portion has a cutout portion for discharging mud provided at least at the lower end portion of the support body.

3. The agricultural machine according to claim 1 or 2.

4. The cutout for discharging mud is longitudinal in the front-to-rear direction.

4. The agricultural implement according to claim 3.

5. The cutout for discharging mud is provided in the middle of the lower end of the support in the front-rear direction.

4. The agricultural implement according to claim 3.

6. The support body has a side plate that covers the side of the tillage body, The mud discharge port is composed only of a cutout for mud discharge provided at the lower end of the side plate.

3. The agricultural machine according to claim 1 or 2.

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