Threshing drum of threshing device

Abstract

To propose a combine harvester capable of efficiently discharging dust floating on a frame body of a feeder house to the outside of the feeder house.SOLUTION: A pre-reaping treatment device (3) comprises: a raking device (3A) that conveys grain culms in a farm field rearward while standing them upright; a reaping blade device (3B) that cuts the base of the conveyed grain culms; an auger device (3C) that gathers the conveyed grain culms to one side; and a feeder house (3D) that conveys the gathered grain culms to a threshing device (4). A mesh body (34) for filtering dust inside the feeder house (3D) is provided on the upper wall of a frame body (30) of the feeder house (3D). A suction dust exhaust fan (50) for suctioning the dust, and a suction dust exhaust box (41) covering the suction dust exhaust fan (50) are provided above the mesh body (34). In the rear view, the right end of the suction dust exhaust fan (50) is arranged higher than the left end.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a combine harvester equipped with a dust removal device in a feeder house.

Background Art

[0002] Conventionally, a technique is known in which a suction dust removal fan is provided on the upper wall of the frame of a feeder house to suck dust floating in the frame and discharge it to the outside. (Patent Documents 1, 2)

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique of Patent Document 1, since the suction dust removal fan is provided close to the upper wall of the frame of the feeder house, the suction force of the suction dust removal fan is reduced by the grain straws carried around by the elevator, and there is a risk that the dust floating in the frame cannot be efficiently discharged to the outside.

[0005] In the technique of Patent Document 2, since the suction dust removal fan is provided close to the net body for filtering dust, dust adheres to the central part of the net body and the outer peripheral part of the suction dust removal fan, and there is a risk that the dust floating in the frame cannot be efficiently discharged to the outside. In addition, when a large amount of grain straws are input into the elevator for transportation, the amount of grain straws carried around by the elevator also increases. When the spike tip part contacts the attachment part of the suction dust removal box to the frame, the husks are removed, etc. Also, when removing the clogged dust from the net body, it is necessary to move the net body downward, so it has been pointed out that the dust removal work takes time.

[0006] Therefore, the main object of the present invention is to propose a combine harvester capable of efficiently discharging the dust floating in the frame of the feeder house to the outside of the feeder house.

Means for Solving the Problems

[0007] The present invention that solves the above problems is as follows. That is, the invention according to claim 1 is a combine harvester provided with a pre-harvesting treatment device (3) for harvesting cereal straws on the front side of the body frame (1), a threshing device (4) for threshing and sorting cereal straws on the rear left side of the pre-harvesting treatment device (3), and an operator's cab (5) on the rear right side of the pre-harvesting treatment device (3). The pre-harvesting treatment device (3) is formed by a raking device (3A) for transporting cereal straws in the field to the rear while standing them up, a cutting blade device (3B) for cutting the roots of the transported cereal straws, an auger device (3C) for gathering the transported cereal straws to one side, and a feeder house (3D) for transporting the gathered cereal straws to the threshing device (4). A net body (34) for filtering the dust in the feeder house (3D) is provided on the upper wall of the frame body (30) of the feeder house (3D). Above the net body (34), a suction dust exhaust fan (50) for sucking dust and a suction dust exhaust box (41) covering the suction dust exhaust fan (50) are provided. In a rear view, a combine harvester characterized in that the right end portion is disposed above the left end portion of the suction dust exhaust fan (50).

[0008] The invention according to claim 2 is the combine according to claim 1, wherein the suction and dust exhaust box (41) is formed by a lower wall (42), a right wall (43) extending upward from the right end of the lower wall (42), an upper wall (44) extending leftward from the right wall (43), an outer left wall (45) extending downward from the lower left end of the upper wall (44), an inner left wall (46) extending downward from the left end of the lower wall (42), and a front wall (47) and a rear wall (48) connected to the front and rear portions of the lower wall (42), right wall (43), upper wall (44), outer left wall (45) and inner left wall (46). In a rear view, the distance between the left part of the suction and dust exhaust fan (50) and the part extending obliquely downward to the left of the top (44A) of the upper wall (44) is formed wider than the distance between the right part of the suction and dust exhaust fan (50) and the part extending obliquely upward to the right of the top (44A) of the upper wall (44).

[0009] The invention according to claim 3 is the combine according to claim 2, wherein in a rear view, the extension line of the axis of the rotating shaft (53) that supports the fan (52) of the suction and dust exhaust fan (50) passes through the top (44A) of the upper wall (44).

[0010] The invention according to claim 4 is the combine according to claim 3, wherein a narrow guide (61) for lodging uncut cereal straws to the left is provided on the left wall of the auger frame (60) of the auger device (3C), and in a side view, the exhaust air discharged from the dust exhaust port (49) of the suction and dust exhaust box (41) is blown toward the rear end of the narrow guide (61) projecting toward the uncut cereal straw side.

[0011] The invention according to claim 5 is the combine according to any one of claims 1 to 4, wherein an inspection window (48A) for visually observing the suction and dust exhaust fan (50) and the net body (34) is provided on the rear wall (48) of the suction and dust exhaust box (41).

[0012] The invention according to claim 6 is the combine according to claim 5, wherein the inspection window (48A) is supported on the rear wall (48) so as to be openable and closable.

Advantages of the Invention

[0013] According to the invention described in claim 1, the pre-harvest processing device (3) is formed by a raking device (3A) that conveys the cereal straw in the field to the rear while standing it up, a cutting blade device (3B) that cuts the base of the conveyed cereal straw, an auger device (3C) that gathers the conveyed cereal straw to one side, and a feeder house (3D) that conveys the gathered cereal straw to the threshing device (4). A net body (34) for filtering dust in the feeder house (3D) is provided on the upper wall of the frame body (30) of the feeder house (3D). Above the net body (34), a suction dust exhaust fan (50) for sucking dust is provided, and a suction dust exhaust box (41) that covers the suction dust exhaust fan (50) is provided. In a rear view, since the right end of the suction dust exhaust fan (50) is arranged above the left end, dust floating in the frame body (30) of the feeder house (3D) can be efficiently discharged to the outside of the frame body (30). Further, since the spike tip portion does not come into contact with the attachment portion of the suction dust exhaust box to the frame body, the generation of hulling of the paddy can be prevented.

[0014] According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the suction dust exhaust box (41) is formed by a lower wall (42), a right wall (43) extending upward from the right end of the lower wall (42), an upper wall (44) extending leftward from the right wall (43), an outer left wall (45) extending downward from the lower left end of the upper wall (44), an inner left wall (46) extending downward from the left end of the lower wall (42), and a front wall (47) and a rear wall (48) connected to the front and rear portions of the lower wall (42), the right wall (43), the upper wall (44), the outer left wall (45), and the inner left wall (46). In a rear view, the interval between the left part of the suction dust exhaust fan (50) and the part extending diagonally downward to the left of the top (44A) of the upper wall (44) is formed wider than the interval between the right part of the suction dust exhaust fan (50) and the part extending diagonally upward to the left of the top (44A) of the upper wall (44). Therefore, after the suction dust exhaust generated by the suction dust exhaust fan (50) is smoothly blown to the left along the upper wall (44), it is smoothly blown along the space partitioned by the upper wall (44), the outer left wall (45), the inner left wall (46), the front wall 47, and the rear wall 48, suppressing the adhesion of dust to the inner surface of the suction dust exhaust box 41 and enabling efficient discharge to the outside.

[0015] According to the invention described in claim 3, in addition to the effects of the invention described in claim 2, in a rear view, since the extension line of the axis of the rotating shaft (53) that supports the fan (52) of the suction and dust exhaust fan (50) passes through the top (44A) of the upper wall (44), after the exhaust air generated by the suction and dust exhaust fan (50) is more smoothly blown to the left along the upper wall (44), it can be more smoothly blown along the space defined by the upper wall (44), the outer left wall (45), the inner left wall (46), the front wall 47, and the rear wall 48.

[0016] According to the invention described in claim 4, in addition to the effects of the invention described in claim 3, a narro-guide (61) for lodging uncut cereal straws to the left is provided on the left wall of the auger frame (60) of the auger device (3C). In a side view, since the exhaust air discharged from the dust exhaust port (49) of the suction and dust exhaust box (41) is blown toward the rear end of the narro-guide (61) that protrudes toward the uncut cereal straw side, the water droplets attached to the tips of the uncut cereal straws can be efficiently blown off and removed. Also, since the amount of moisture brought into the threshing device (4) is reduced, the load of the threshing and sorting process can be reduced.

[0017] According to the invention described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4, since an inspection window (48A) for visually observing the suction and dust exhaust fan (50) and the mesh body (34) is provided on the rear wall (48) of the suction and dust exhaust box (41), an operator boarding the control unit (5) can easily visually observe the clogging of the mesh body (34), the rotation state of the fan (52), and the adhesion state of dust.

[0018] According to the invention described in claim 6, in addition to the effects of the invention described in claim 5, since the inspection window (48A) is supported on the rear wall (48) so as to be openable and closable, the inspection window (48A) can be opened, and fingertips can be inserted between the mesh body (34) and the fan (52) to easily remove the dust attached to the mesh body (34) and the like.

Brief Description of the Drawings

[0019]

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Embodiments for Carrying Out the Invention

[0020] As shown in FIGS. 1 to 3, the general-purpose combine is provided with a traveling device 2 composed of a pair of left and right crawlers that travel on the soil surface below the body frame 1, and a pre-harvest treatment device 3 for harvesting the cereal straws in the field is provided on the front side of the body frame 1. A threshing device 4 for threshing and sorting the harvested cereal straws is provided on the rear left side of the pre-harvest treatment device 3, and an operator's cab 5 for the operator to board is provided on the rear right side of the pre-harvest treatment device 3.

[0021] An engine room 6 for housing the engine is provided below the operator's cab 5, a grain tank 7 for storing the threshed and sorted grains is provided on the rear side of the operator's cab 5, and a discharge auger 8 for discharging the grains to the outside is provided on the rear side of the grain tank 7.

[0022] The pre-harvest treatment device 3 includes a raking device 3A that conveys the cereal straw in the field to the rear while standing it up, a cutting blade device 3B that cuts the roots of the cereal straw conveyed to the lower part at the rear of the raking device 3A, an auger device 3C that gathers the cereal straw conveyed to the rear of the raking device 3A to the left side, and a feeder house 3D that conveys the gathered cereal straw to the threshing device 4.

[0023] As shown in FIG. 4, the threshing device 4 is formed by a handling chamber 10 for threshing the cereal straw and a sorting chamber 20 for sorting the threshed grains.

[0024] On the front and rear walls of the handling chamber 10, a handling cylinder 11 for threshing the cereal straw conveyed from the feeder house 3D is installed. Below the handling cylinder 11, a receiving net 12 formed in a semi-circular arc shape along the lower outer periphery of the handling cylinder 11 is provided. Further, the upper part of the handling cylinder 11 is covered by an openable and closable handling cylinder cover 13, and a dust conveying plate for guiding the cereal straw to the rear part of the handling chamber 10 is provided on the inner peripheral part of the handling cylinder cover 13. Note that the handling cylinder 11 is supported by a rotor shaft 14 extending in the front-rear direction.

[0025] At the upper part of the sorting chamber 20, a swinging sorting device 21 for sorting the grains leaking from the handling chamber 10 is provided. Below the swinging sorting device 21, in order from the front side, there are a winnowing basket 25 that blows sorting air to the swinging sorting device 21, a wind divider 26 that changes the blowing direction of the sorting air behind the winnowing basket 25, a first spiral 27 that conveys the grains leaking from the swinging sorting device 21 to the grain tank 7, and a second spiral 28 that re-conveys the grains with attached branches and stems or cut straws leaking from the rear part of the swinging sorting device 21 to the sorting shelf at the front part of the swinging sorting device 21.

[0026] As shown in FIG. 5, a dust exhaust device 40 for exhausting the dust floating in the feeder house 3D to the outside is provided on the frame body 30 of the feeder house 3D.

[0027] As shown in Fig. 6, the dust exhaust device 40 is formed by a suction dust exhaust box 41 and a suction dust exhaust fan 50 provided inside the suction dust exhaust box 41. Also, in a side view, the dust exhaust device 40 is provided between a drive shaft 32 extending in the left - right direction provided at the rear of an elevator 31 for conveying cereal straws on the upper plate of the frame body 30 and a driven shaft 33 extending in the left - right direction provided at the front, and is provided at a position offset from the driven shaft 33. Thereby, the dust adhering to the cereal straws conveyed by the elevator 31, particularly the dust adhering to the rotating cereal straws conveyed from the drive shaft 32 toward the driven shaft 33 above the elevator 31, and the dust adhering to the cereal straws gathered to the left side by the auger device 3C can be efficiently sucked by the dust exhaust device 40 and discharged outside the frame body 30.

[0028] As shown in Figs. 6 and 7, the suction dust exhaust box 41 has an opening at a portion facing a net body 34 provided on the upper plate of the frame body 30, that is, a lower wall 42 formed with a dust suction port (not shown) for sucking dust into the suction dust exhaust box 41, a right wall 43 extending upward from the right end of the lower wall 42, an upper wall 44 formed with a left - upper inclination from the upper end of the right wall 43 and then a left - lower inclination, an outer left wall 45 extending downward with a left - lower inclination after inclining left - upward from the left - lower end of the upper wall 44, and an inner left wall 46 formed with a left - lower inclination after extending downward from the left end of the lower wall 42. Since the net body 34 is installed on the upper plate of the frame body 30, the ear tips carried around the attachment portion of the suction dust exhaust box 41 to the frame body 30 do not come into contact, and the hulling of the paddy can be prevented.

[0029] The front ends of the lower wall 42, the right wall 43, the upper wall 44, the outer left wall 45, and the inner left wall 46 are connected to the outer peripheral edge of a front wall 47, and the rear ends of the lower wall 42, the right wall 43, the upper wall 44, the outer left wall 45, and the inner left wall 46 are connected to the outer peripheral edge of a rear wall 48.

[0030] At the lower ends of the outer left wall 45, the inner left wall 46, the front wall 47, and the lower wall 42, a rectangular opening partitioned by the outer left wall 45, the inner left wall 46, the front wall 47, and the lower wall 42, that is, a dust exhaust port 49 for discharging dust from the suction dust exhaust box 41 to the outside is formed.

[0031] On the inner surface of the inner left wall 46, there is provided a guide piece 46A for guiding the dust in the suction and dust exhaust box 41 toward the dust exhaust port 49.

[0032] The suction and dust exhaust fan 50 is mounted on the upper surface of a support plate 51 provided with an upward slope from the left part of the upper surface of the lower wall 42.

[0033] In a rear view, the rotation axis 53 of the fan 52 of the suction and dust exhaust fan 50 is provided orthogonally to the support plate 51, and the axis center of the rotation axis 53 is provided so as to pass through the top part 44A which is the folded part of the upward sloping part and the downward sloping part of the upper wall 44. Note that the rotation axis 53 is rotated by a motor (not shown).

[0034] Thereby, the suction and dust exhaust wind generated by the fan 52 can be smoothly blown along the space partitioned by the upper wall 44, the outer left wall 45, the inner left wall 46, the front wall 47, and the rear wall 48, suppressing the dust sucked into the suction and dust exhaust box 41 from adhering to the inside of the suction and dust exhaust box 41 and efficiently discharging it to the outside through the dust exhaust port 49.

[0035] An opening is formed in the lower right part of the rear wall 48, and an inspection window 48A in which a transparent plate such as acrylic is fitted is provided in the opening. Thereby, the operator of the control unit 5 can easily visually check the clogging of the net body 34, the rotation state of the fan 52, and the adhesion state of dust to the fan 52, and can easily remove the dust adhering to the net body 34 etc. by opening the plate and inserting a fingertip between the net body 34 and the fan 52 through the inspection window 48A.

[0036] As shown in FIGS. 8 and 9, the dust exhaust port 49 of the suction and dust exhaust box 41 is arranged on the rear right side behind the rear end of a narrow guide 61 mounted on the left wall of the auger frame 60 of the auger device 3C in a plan view, and is arranged at substantially the same height as the rear end of the narrow guide 61 in a side view. Thereby, the suction and dust exhaust wind discharged together with the dust from the dust exhaust port 49 hits the spike tip of the unharvested cereal straw, removing water droplets etc. adhering to the spike tip of the unharvested cereal straw, and reducing the moisture rate of the grains threshed and sorted by the threshing device 4.

[0037] The narro-guide 61 projects leftward from the left wall of the auger frame 60 and is a component that bends leftward the uncut cereal straws planted on the left side in the traveling direction of the combine. FIGS. 8 and 9 illustrate the narro-guide 61 that projects leftward from the left wall of the auger frame 60.

[0038] On the left and right walls of the auger frame 60, a scraping auger 63 that scrapes and collects the cereal straws conveyed to the auger frame 60 to the front side of the conveyance port 60A is rotatably supported. Further, on the outer peripheral portion of the scraping auger 63, a conveyance helix 64 and a plurality of scraping fingers 65 that can project and retract from the outer peripheral portion are provided.

[0039] As shown in FIGS. 10 and 11, on the rear wall of the auger frame 60 of the auger device 3C, a conveyance port 60A is formed that conveys the cereal straws gathered on the left side of the auger frame 60 to the frame body 30 of the feeder house 3D.

[0040] On the inner surfaces of the left and right walls of the front portion of the frame body 30 connected to the conveyance port 60A, substantially L-shaped guide members 35 that guide the cereal straws conveyed through the conveyance port 60A to the rear of the frame body 30 are respectively provided. Thereby, it is possible to suppress the cereal straws from getting entangled and staying in the front portion of the frame body 30, and efficiently convey the cereal straws to the rear portion of the frame body 30 by the elevator 31.

[0041] On the left and right sides of the conveyance port 60A on the rear wall of the auger frame 60, guide plates 62 that can move in the left-right direction and guide the cereal straws to the conveyance port 60A are respectively provided. In plan view, the right end portion of the left guide plate 62 is provided at the same position in the left-right direction as the right end portion of the left guide member 35, and the left end portion of the right guide plate 62 is provided at the same position in the left-right direction as the left end portion of the right guide member 35. Thereby, it is possible to suppress the cereal straws conveyed from the conveyance port 60A of the auger frame 60 to the frame body 30 from getting entangled with the guide member 35, and more efficiently convey the cereal straws to the rear portion of the frame body 30 by the elevator 31.

[0042] As shown in Fig. 12, on the outer surfaces of the left and right walls of the frame body 30, there are respectively provided hook members 36 having a substantially J - shape for locking cables such as sensors for detecting the lifting height and the like of the scraping device 3A. Thereby, the cables such as sensors can be locked to the hook members 36, and the routing of the cables can be easily performed.

[0043] On the inner surface of the front part of the upper wall of the frame body 30, there is provided an inclined plate 37 which is formed with a forward - downward inclination and is connected to the rear surface of the front wall. Thereby, the rigidity of the front part of the upper wall can be enhanced, and it is possible to prevent the upper wall from being deformed by the load applied to the upper wall via the hook member 36.

[0044] As shown in Fig. 13, the forward - downward inclination angle of the inclined plate 37 is formed to be larger than the forward - downward inclination angle of the virtual line L that contacts the outer peripheral surface of the scraping auger 63 from the rear end portion of the inclined plate 37. Thereby, the rotating grain straws conveyed from the drive shaft 32 toward the driven shaft 33 at the upper part of the elevator 31 can be returned and conveyed into the auger frame 60 through the conveying port 60A.

Explanation of Signs

[0045] 1 Body frame 3 Pre - harvesting treatment device 3A Scraping device 3B Cutting blade device 3C Auger device 3D Feeder house 4 Threshing device 5 Control part 30 Frame body 34 Mesh body 41 Suction dust box 42 Lower wall 43 Right wall 44 Upper wall 44A Top part 45 Outer left wall 46 Inner left wall 47 Front wall 48 Rear wall 48A Inspection window 49 Dust exhaust port 50 Suction dust fan 52 Fans 53 Rotating shaft 60 Auger frame 61 Narrow guide

Claims

1. A combine harvester having a pre-harvesting device (3) for harvesting stalks provided at the front of a machine frame (1), a threshing device (4) for threshing and sorting the stalks provided at the rear left side of the pre-harvesting device (3), and a control section (5) for an operator to ride on provided at the rear right side of the pre-harvesting device (3), The pre-harvesting treatment device (3) is formed of a raking device (3A) that transports the culms in the field to the rear while standing them up, a cutting blade device (3B) that cuts the base of the transported culms, an auger device (3C) that gathers the transported culms to one side, and a feeder house (3D) that transports the gathered culms to a threshing device (4), a mesh body (34) for filtering dust in the feeder house (3D) is provided on an upper wall of the frame body (30) of the feeder house (3D); A suction dust exhaust fan (50) for sucking dust and a suction dust exhaust box (41) for covering the suction dust exhaust fan (50) are provided above the mesh body (34); A combine harvester characterized in that, in rear view, the right end of the suction / dust exhaust fan (50) is disposed higher than the left end.

2. The suction and dust discharge box (41) is formed of a lower wall (42), a right wall (43) extending upward from the right end of the lower wall (42), an upper wall (44) extending to the left of the right wall (43), an outer left wall (45) extending downward from the lower left end of the upper wall (44), an inner left wall (46) extending downward from the left end of the lower wall (42), and a front wall (47) and a rear wall (48) connected to the front and rear portions of the lower wall (42), the right wall (43), the upper wall (44), the outer left wall (45), and the inner left wall (46), 2. A combine harvester as claimed in claim 1, wherein, in rear view, the distance between the left part of the suction dust discharge fan (50) and the part extending upward and left on the right side of the apex (44A) of the upper wall (44) is wider than the distance between the right part of the suction dust discharge fan (50) and the part extending upward and left on the right side of the apex (44A) of the upper wall (44).

3. 3. A combine harvester according to claim 2, wherein, in rear view, an extension line of an axis of a rotating shaft (53) supporting a fan (52) of the suction / dust exhaust fan (50) passes through a top portion (44A) of the upper wall (44).

4. A narrow guide (61) for causing unharvested stalks to fall to the left is provided on the left wall of the auger frame (60) of the auger device (3C), A combine harvester as described in claim 3, wherein, in a side view, the exhaust air discharged from the dust outlet (49) of the suction and dust discharge box (41) is blown toward the rear end of a narrow guide (61) extending toward the uncut stalk side.

5. The combine harvester according to any one of claims 1 to 4, wherein an inspection window (48A) for monitoring the suction dust discharge fan (50) and the mesh body (34) is provided on a rear wall (48) of the suction dust discharge box (41).

6. 6. A combine harvester according to claim 5, wherein the inspection window (48A) is supported in the rear wall (48) so as to be freely opened and closed.

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