Work equipment

Abstract

To provide a working machine being connectable to a work vehicle, having high excavation efficiency of a field surface and capable of easily changing a dispersion direction of the excavated soil according to the growth of crops.SOLUTION: A working machine includes a rotary (23) excavating a field surface and extending in a horizontal direction, provided on a lower side thereof, the upper side of the rotary (23) is covered by a body plate (20) and first covers (26L and 26R), and the first covers (26L and 26R) are supported by first arms (25L and 25R) rotatably provided on both sides in horizontal direction of the body plate (20). The body plate (20) includes a vertical frame (30) extending upward and rearward, provided on the front side thereof, the first arms (25L and 25R) and the vertical frame (30) are connected with second arms (32L and 32R), and the upper parts of the second arms (32L and 32R) are moved so as to change an inclination angle of the first covers (26L and 26R).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a work machine to be towed by a work vehicle such as a tractor. [Background technology]

[0002] A conventional technique is known in which a rotary of a work machine is used to excavate a field, and the excavated soil is spread laterally by a blade attached to the rear of the rotary, and then covered with the leaf sheaths of crops such as leeks planted in ridges (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-318104 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the work machine in Patent Document 1 is a walk-behind work machine, which has the problem of low digging efficiency in the field and low work efficiency because it is difficult to change the direction of soil spreading in accordance with the growth of the crops.

[0005] Therefore, the present invention aims to provide a work machine that can be connected to a work vehicle, has high excavation efficiency in the field, and can easily change the direction in which excavated soil is spread in accordance with the growth of crops. [Means for solving the problem]

[0006] The present invention, which has solved the above problems, is as follows. That is, the invention described in claim 1 is a work machine attached to the rear of a work vehicle traveling in a field, A rotary (23) extending in the left-right direction for excavating the field surface is provided at the bottom of the work machine, and the rotary (23) is covered from above with a main body plate (20) and first covers (26L, 26R). The first covers (26L, 26R) are supported by first arms (25L, 25R) rotatably provided on both sides of the main body plate (20) in the left-right direction. A vertical frame (30) extending upward and rearward is provided at the front of the main body plate (20), and the first arms (25L, 25R) and the vertical frame (30) are supported by second arms (25L, 25R). The work machine is characterized in that the first covers (26L, 26R) are connected by second arms (32L, 32R), and the inclination angle of the first covers (26L, 26R) can be changed by moving the upper parts of the second arms (32L, 32R), second covers (28L, 28R) are rotatably provided on both left and right sides of the first covers (26L, 26R), and guides (29L, 29R) made of round steel and extending in the front-to-rear direction from the front to the rear of the second covers (28L, 28R) are provided on both left and right sides of the second covers (28L, 28R).

[0007] The invention described in claim 2 is a work machine according to claim 1, wherein the work machine is connected to the rear of a work vehicle via link arms (21) extending forward from a main body plate (20), the vertical frame (30) is provided between the left and right link arms (21), the vertical frame (30) is provided with engagement means (31) that engages the upper parts of the second arms (32L, 32R), and the work machine is configured to be able to rise and fall between a standby position in which the rotary (23) is positioned above and away from the field surface, and a working position in which the rotary (23) abuts against the field surface, and when the work machine is positioned in the working position, the engagement means (31) is located at the rear end of the vertical frame (30) extending upward and rearward, and when the work machine is positioned in the standby position, the engagement means (31) and the second arms (32L, 32R) are located near the rear of the control section (2) of the work vehicle.

[0008] The invention described in claim 3 is a claim in which hook holes (33L, 33R) having long axes in the circumferential direction are formed in the upper part of the second arms (32L, 32R) which are arc-shaped, and recesses (34L, 34R) for engaging with pins (31A) extending in the front-rear direction of the engaging means (31) are formed in the inner periphery of the hook holes (33L, 33R) at a predetermined interval in the circumferential direction. 2 This is the working machine described above.

[0009] The invention of claim 4 is the work machine of any one of claims 1 to 3, wherein second arms (32L, 32R) are provided symmetrically on the left and right sides of the vertical frame (30) in rear view.

[0010] A fifth aspect of the present invention provides the work machine according to any one of the first to fourth aspects, wherein the first arms (25L, 25R) support the first covers (26L, 26R) so as to be movable in the left-right direction.

[0011]

[0012] [Effects of the Invention]

[0013] According to the invention of claim 1, a rotary (23) extending in the left-right direction for excavating a field surface is provided at the bottom of the work machine, the rotary (23) is covered from above with a main body plate (20) and first covers (26L, 26R), the first covers (26L, 26R) are supported by first arms (25L, 25R) rotatably provided on both sides of the main body plate (20) in the left-right direction, a vertical frame (30) extending upward and rearward is provided at the front of the main body plate (20), the first arms (25L, 25R) and the vertical frame (30) are connected by second arms (32L, 32R), and the second arms (32R) are supported by the first arms (25L, 25R) and the vertical frame (30) in the left-right direction. The tilt angle of the first covers (26L, 26R) can be changed by moving the upper parts of the frames (32L, 32R). The second covers (28L, 28R) are rotatably provided on both left and right sides of the first covers (26L, 26R). Round steel guides (29L, 29R) extending in the front-to-rear direction from the front to the rear of the second covers (28L, 28R) are provided on both left and right sides of the second covers (28L, 28R). This allows for efficient excavation in the field and makes it easy to change the direction of excavated soil dispersion in accordance with the growth of crops planted in the ridges. Furthermore, it is possible to prevent crops, such as green onions, planted in the ridges adjacent to the left and right sides of the implement from becoming entangled in the second covers (28L, 28R).

[0014] According to the invention of claim 2, in addition to the effects of the invention of claim 1, the working machine is connected to the rear of the work vehicle via link arms (21) extending forward from the main body plate (20), and a vertical frame (30) is provided between the left and right link arms (21), and the vertical frame (30) is provided with engagement means (31) for engaging the upper parts of the second arms (32L, 32R), so that the working machine can be raised and lowered between a retracted position in which the rotary (23) is positioned above and away from the field surface, and a working position in which the rotary (23) abuts against the field surface, and when the working machine is positioned in the working position, the engagement means (31) is located at the rear end of the vertical frame (30) extending upward and rearward, When the work machine is positioned in the standby position, the engagement means (31) and the second arms (32L, 32R) are configured to be located near the rear of the control section (2) of the work vehicle, so the worker can easily change the inclination angle of the first covers (26L, 26R) by moving the upper parts of the second arms (32L, 32R) circumferentially from the control section of the work vehicle.

[0015] According to the invention described in claim 3, 2 In addition to the effects of the invention described above, hook holes (33L, 33R) having long axes in the circumferential direction are formed in the upper part of the arc-shaped second arms (32L, 32R), and recesses (34L, 34R) that engage with the pins (31A) extending in the front-to-rear direction of the engagement means (31) are formed in the inner periphery of the hook holes (33L, 33R) at a predetermined interval in the circumferential direction, thereby making it easier to change the spreading direction of the excavated soil in accordance with the growth of the crops.

[0016] According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, in rear view, the second arms (32L, 32R) are arranged symmetrically about the vertical frame (30), so that the upper parts of the second arms (32L, 32R) can be moved circumferentially to more easily change the inclination angle of the first covers (26L, 26R).

[0017] According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the first arms (25L, 25R) support the first covers (26L, 26R) so that they can move in the left-right direction, so that the left-right length of the first covers (26L, 26R) can be adjusted according to the left-right spacing between adjacent ridges.

[0018]

[0019] [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a left side view of the work vehicle and the work implement in a working posture towed by the work vehicle. [Figure 2] FIG. 2 is a left side view of the work vehicle and the work implement towed by the work vehicle in a standby position. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 10 is a left side view of the vertical frame and engagement means that sandwich the arm. [Figure 8] FIG. 10 is an explanatory diagram of a guide for a sub rotary cover. [Figure 9] FIG. 4 is an explanatory diagram of the left and right rotary covers of the work machine. DETAILED DESCRIPTION OF THE INVENTION

[0021] As shown in Figures 1 and 2, a work machine that covers the leaf sheaths of leeks with soil is connected to the rear of a work vehicle such as a tractor.

[0022] A bonnet 1 that houses the engine is provided at the front of the tractor, and a control section 2 where the operator sits is provided behind the bonnet 1. A steering wheel 3 is provided in front of the control section 2, and a control seat 4 where the operator sits is provided behind the steering wheel 3, spaced a predetermined distance in the front-to-rear direction.

[0023] A safety frame 5 extending in the vertical direction is provided behind the operator's seat 4 to protect the safety of the operator in the event of the work vehicle tipping over, and a connecting part 6 that connects the front part of a link arm 21 of the work machine is provided below the operator's seat 4 at the rear, and a PTO shaft 7 extending in the longitudinal direction to which the output rotation of the engine is transmitted is provided below the connecting part 6. Note that reference numeral 8 indicates the front wheels, and reference numeral 9 indicates the rear wheels.

[0024] A hydraulic cylinder 10 that raises and lowers the work machine is provided below the operator's seat 4. The rod tip of the hydraulic cylinder 10 is connected to the base of a lift arm 11, the tip of the lift arm 11 is connected to the base of a lift rod 12, and the tip of the lift rod 12 is connected to a link arm 21 of the work machine. The base of the lift arm 11 is rotatably supported by a support shaft 11A that extends in the left-right direction, and the base of the lift rod 12 is rotatably supported by a support shaft 12A that extends in the left-right direction.

[0025] As shown in Figure 1, when the rod of the hydraulic cylinder 10 is retracted, the lift arm 11 rotates clockwise around the support shaft 11A, and the lift rod 12 rotates counterclockwise around the support shaft 12A, so that the work machine descends and assumes a working position in which the rotary 23 of the work machine abuts on the field surface. On the other hand, as shown in Figure 2, when the rod of the hydraulic cylinder 10 is extended, the lift arm 11 rotates counterclockwise around the support shaft 11A, and the lift rod 12 rotates clockwise around the support shaft 12A, so that the work machine rises and assumes a retracted position in which the rotary 23 of the work machine is spaced a predetermined height from the field surface.

[0026] As shown in FIGS. 3 to 5, rear portions of a pair of left and right link arms 21 extending forward are supported on the upper surface of a rectangular main body plate 20 of the work machine.

[0027] A pin 21A extending leftward is provided at the front part of the left surface of the left link arm 21L, and a pin 21B extending leftward is provided at the middle part of the left surface of the left link arm 21L.

[0028] A pin 21A extending toward the right is provided at the front part of the right surface of the right link arm 21R, and a pin 21B extending toward the right is provided at the middle part of the right surface of the right link arm 21L.

[0029] The pins 21A of the link arms 21L and 21R are rotatably connected to a pair of cylindrical shafts 6A extending in the left-right direction and provided on the connecting portion 6 of the work vehicle, while the pin 21B of the link arm 21L is rotatably connected to a cylindrical shaft 12B extending in the left-right direction and provided on the tip of the left lift rod 12L of the work vehicle, and the pin 21B of the link arm 21R is rotatably connected to a cylindrical shaft 12B extending in the left-right direction and provided on the tip of the right lift rod 12R of the work vehicle. This allows the work machine to be raised and lowered by operating the hydraulic cylinder 10 to move between a working posture and a standby posture.

[0030] A gearbox 22 that accelerates or decelerates the output rotation transmitted from the PTO shaft 7 is supported in the center of the left-right direction on the underside of the main plate 20, and cylindrical rotary 23 that rotates by transmitting the output rotation of the gearbox 22 is provided on both left and right sides of the gearbox 22. This allows the rotation speed of the rotary 23 to be increased or decreased according to the state of the field. The PTO shaft 7 and the input shaft of the gearbox 22 are connected by a connecting means such as a universal joint.

[0031] The rotary 23 has spirally arranged excavation blades (not shown) extending radially at a predetermined interval in the left-right direction on its outer peripheral surface.As a result, when the work machine is in the working position and the rotary 23 is brought into contact with the field surface, the rotary 23 can excavate the field surface and efficiently spread the excavated soil to the upper left and upper right sides.

[0032] Cover arms 25 are attached to both left and right sides of the main body plate 20 via hinges 24. This allows the cover arms 25 to be freely opened and closed around the rotation axis of the hinges 24. The cover arms 25 are formed from a left cover arm (the "first arm" in the claims) 25L and a right cover arm (the "first arm" in the claims) 25R, and the rotation axis of the hinges 24 is provided to extend in the front-to-rear direction.

[0033] The left cover arm 25L is formed of an outer front-rear frame 25A and an inner front-rear frame 25B extending in the front-rear direction, a front left-right frame 25C connecting the outer front-rear frame 25A and the inner front-rear frame 25B, an intermediate left-right frame 25D, and a rear left-right frame 25E. The right part of the inner front-rear frame 25B is connected to the left part of the main body plate 20 via a hinge 24.

[0034] A long hole 25F having a long axis in the left-right direction is formed in the left-right center of each of the front left and right frames 25C and the rear left and right frames 25E. This makes it possible to adjust the length of the rotary cover 26L extending to the left of the outer front / rear frame 25A by moving a hanging means 26A such as a bolt that hangs the rotary cover (the "first cover" in the claims) 26L in the left-right direction along the long hole 25F.

[0035] A support shaft 25G extending in the front-rear direction is provided on the left side of the front left and right frames 25C and the intermediate left and right frames 25D, supporting the left end of the left arm 32L shown in FIG.

[0036] Similarly, the right cover arm 25R is formed of an outer front-rear frame 25A and an inner front-rear frame 25B extending in the front-rear direction, a front left-right frame 25C connecting the outer front-rear frame 25A and the inner front-rear frame 25B, an intermediate left-right frame 25D, and a rear left-right frame 25E. The left portion of the inner front-rear frame 25B is connected to the right portion of the main body plate 20 via a hinge 24.

[0037] A long hole 25F having a long axis in the left-right direction is formed in the left-right center of each of the front left and right frames 25C and the rear left and right frames 25E. This makes it possible to adjust the length of the rotary cover 26L extending to the right of the outer front and rear frame 25A by moving a hanging means 26A such as a bolt that hangs the rotary cover (the "first cover" in the claims) 26R in the left-right direction along the long hole 25F.

[0038] A support shaft 25G extending in the front-rear direction is provided on the right side of the front left and right frames 25C and the middle left and right frames 25D to support the right end of the right arm 32R shown in FIG.

[0039] Rotary cover 26L, which is hung below left cover arm 25L, is provided with sheet guide 26B, which extends downward and forward from the front end of rotary cover 26L, and sheet guide 26C, which extends downward and rearward from the rear end of rotary cover 26L, and rectangular elastic sheet 26D is attached to the front surface of sheet guide 26B, and rectangular elastic sheet 26E is attached to the rear surface of sheet guide 26C. This prevents soil spread upward and left by rotary 23 from spreading forward and rearward, and enables soil to be efficiently applied to cover the leaf sheaths of leek plants planted in the furrow adjacent to the left side of the implement.

[0040] Similarly, rotary cover 26R suspended below right cover arm 25R is provided with sheet guide 26B extending downward and forward from the front end of rotary cover 26R and sheet guide 26C extending downward and rearward from the rear end of rotary cover 26R, with rectangular elastic sheet 26D attached to the front of sheet guide 26B and rectangular elastic sheet 26E attached to the rear of sheet guide 26C. This prevents soil spread upward and to the right by rotary 23 from spreading forward and rearward, allowing soil to be efficiently applied to cover the leaf sheaths of leek plants planted in the furrow adjacent to the right side of the implement.

[0041] An oval-shaped sub-rotary cover (referred to as the "second cover" in the claims) 28L is provided to the left of the left rotary cover 26L via a hinge 27. This allows the sub-rotary cover 28L to be freely opened and closed around the rotation axis of the hinge 27, allowing fine adjustment of the diffusion direction. The rotation axis of the hinge 27 extends in the front-to-rear direction.

[0042] A substantially arc-shaped angle adjustment plate 28A having a predetermined radius from the rotation axis of the hinge 27 is provided on the right side of the sub-rotary cover 28L, and a substantially arc-shaped elongated hole is formed in the angle adjustment plate 28A. A clamping means 26F, such as a bolt extending in the front-rear direction and inserted into the elongated hole in the angle adjustment plate 28A, is provided on the left side of the rotary cover 28L. This allows the angle of the sub-rotary cover 28L to be easily adjusted to match the growth of the green onions planted in the furrow adjacent to the left side of the work machine. A guide 29L made of round steel is provided on the left side of the sub-rotary cover 28L. This prevents the green onions planted in the furrow adjacent to the left side of the work machine from becoming entangled in the sub-rotary cover 28L, as shown in FIG. 8.

[0043] Similarly, an oval-shaped sub-rotary cover (referred to as the "second cover" in the claims) 28R is provided on the right side of the right rotary cover 26R via a hinge 27. This allows the sub-rotary cover 28R to be freely opened and closed around the rotation axis of the hinge 27, allowing fine adjustment of the diffusion direction. The rotation axis of the hinge 27 extends in the front-to-rear direction.

[0044] A generally arc-shaped angle adjustment plate 28A having a predetermined radius from the rotation axis of the hinge 27 is provided on the left side of the sub-rotary cover 28R, and a generally arc-shaped elongated hole is formed in the angle adjustment plate 28A. A clamping means 26F, such as a bolt extending in the front-rear direction and inserted into the elongated hole in the angle adjustment plate 28A, is provided on the right side of the rotary cover 26R. This allows the angle of the sub-rotary cover 28R to be easily adjusted to match the growth of the green onions planted in the ridge adjacent to the right side of the work machine. A guide 29R made of round steel is provided on the right side of the sub-rotary cover 28L. This prevents the green onions planted in the ridge adjacent to the right side of the work machine from becoming entangled in the sub-rotary cover 28R, as shown in FIG. 8.

[0045] A vertical frame 30 extending upward and rearward is provided between the left link arm 21L and the right link arm 21R on the upper surface of the main body plate 20. Further, a screw hole is formed at the rear end of the vertical frame 30 into which engaging means 31 such as a knob bolt is threadedly inserted into hook holes 33 of a pair of left and right arms 32. Reference numeral 40 denotes a tool used during maintenance.

[0046] 6, arm 32 is formed by a left, generally arc-shaped arm (referred to as "second arm" in the claims) 32L and a right, generally arc-shaped arm (referred to as "second arm" in the claims) 32R. The left lower part of arm 32L is rotatably supported by a spindle 25G provided on the left part of cover arm 25. The right lower part of arm 32R is rotatably supported by a spindle 25G provided on the right part of cover arm 25.

[0047] A hook hole 33L is formed in the upper right portion of arm 32L. Five approximately semicircular recesses 34L are provided at predetermined intervals in the circumferential direction above hook hole 33L, which engage with pins 31A extending in the front-rear direction of engagement means 31. Similarly, a hook hole 33R is formed in the upper left portion of arm 32R. Five approximately semicircular recesses 34R are provided at predetermined intervals in the circumferential direction above hook hole 33R, which engage with pins 31A of engagement means 31. As a result, as shown in FIG. 9 , in accordance with the growth of the leeks planted in the furrows, arm 32L is rotated clockwise to increase the inclination angle of rotary cover 26L via cover arm 25L, and arm 32R is rotated counterclockwise to increase the inclination angle of rotary cover 26R via cover arm 25R, so that soil spread from rotary 23 spreads upward, covering the elevated upper portions of the leaf sheaths of the leeks.

[0048] As shown in Figure 7, the arms 32L and 32R are clamped between the rear of the vertical frame 30 and the front of the engaging means 31. This allows the rotational posture of the arms 32L and 32R to be maintained, and the tilt angle of the rotary cover 26L and the cover arm 25R to be reliably maintained during digging work in the field.

[0049] 2, when the work machine is moved to the standby position, the engagement means 31 and arm 32 of the work machine move to the rear side of the control unit 2. This allows the worker to change the tilt angle of the rotary covers 26L, 26R by operating the engagement means 31 and arm 32 from the control unit 2 without getting off the control unit 2.

[0050] As shown in FIGS. 3 to 5, the upper surface of the main body plate 20 supports the front portions of a pair of left and right link arms 36 extending rearward.

[0051] An equipment mounting section 37 having a roughly hexagonal opening is formed at the rear of the link arm 36, and a support member 38A extending in the vertical direction of a compaction device 38 equipped with compaction wheels that flatten the uneven field surface excavated by the rotary 23 is inserted into the equipment mounting section 37. Note that instead of the compaction device 38, a support member for a soil-raising device that compacts the piled-up soil on the slopes of the ridges adjacent to the left and right of the work machine to ensure a clear field surface for the work vehicle to pass through can be attached. [Explanation of symbols]

[0052] 20 Main body plate 21 Link arm 23 Rotary 25L Cover arm (first arm) 25R Cover arm (first arm) 26L Rotary Cover (1st Cover) 26R rotary cover (first cover) 28L Sub rotary cover (second cover) 28R Sub rotary cover (second cover) 29L guide 29R Guide 30 vertical frame 31 Engagement means 31A pin 32L arm (second arm) 32R arm (second arm) 33L hook hole 33R hook hole 34L recess 34R recess

Claims

1. In a work machine attached to the rear of a work vehicle traveling in a field, A rotary (23) extending in the left-right direction for excavating the field surface is provided at the bottom of the working machine, The rotary (23) is covered from above with a main body plate (20) and first covers (26L, 26R), The first covers (26L, 26R) are supported by first arms (25L, 25R) rotatably provided on both sides of the body plate (20) in the left-right direction, A vertical frame (30) is provided at the front of the main body plate (20) and extends upward and rearward, The first arms (25L, 25R) and the vertical frame (30) are connected by second arms (32L, 32R), The upper portion of the second arm (32L, 32R) is moved to change the inclination angle of the first cover (26L, 26R), second covers (28L, 28R) are rotatably provided on both sides of the first covers (26L, 26R) in the left-right direction; A work machine characterized in that guides (29L, 29R) made of round steel extending in the front-to-rear direction from the front to the rear of the second cover (28L, 28R) are provided on both the left and right sides of the second cover (28L, 28R).

2. The work machine is connected to the rear of a work vehicle via a link arm (21) extending forward from a main body plate (20); The vertical frame (30) is provided between the left and right link arms (21), and the vertical frame (30) is provided with engagement means (31) for engaging the upper portions of the second arms (32L, 32R), The working machine is configured to be able to move up and down between a retracted position in which the rotary (23) is positioned above and away from the field surface, and a working position in which the rotary (23) is in contact with the field surface, When the working machine is positioned in a working posture, the engaging means (31) is located at the rear end of the vertical frame (30) extending upward and rearward, 2. A work machine according to claim 1, wherein when the work machine is positioned in a standby position, the engagement means (31) and the second arms (32L, 32R) are positioned near the rear of the operating section (2) of the work vehicle.

3. Hook holes (33L, 33R) having long axes in the circumferential direction are formed in the upper portions of the second arms (32L, 32R) which are arc-shaped, 3. The work machine according to claim 2, wherein recesses (34L, 34R) for engaging with pins (31A) extending in the front-rear direction of the engaging means (31) are formed in the inner peripheral portion of the hook holes (33L, 33R) at a predetermined interval in the circumferential direction.

4. 4. The work machine according to claim 1, wherein second arms (32L, 32R) are provided symmetrically on the left and right sides of the vertical frame (30) in rear view.

5. 5. The work machine according to claim 1, wherein the first arms (25L, 25R) support the first covers (26L, 26R) so as to be movable in the left-right direction.

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