combine

Abstract

We propose a combine harvester that can prevent a decline in grain quality by suppressing the scattering of soil, pebbles, and other obstructing materials that are thrown onto the upper surface of the rotating blades of the cutting device into the auger frame of the auger device. [Solution] The pre-harvesting processing device consists of a scraping device that scoops up and transports the grain stalks in the field backward while standing them upright, a cutting device that cuts the base of the transported grain stalks, an auger device that gathers the transported grain stalks to one side, and a feeder house that transports the gathered grain stalks to a threshing device. The cutting device is formed by a pair of left and right rotating blade devices and a lifter device positioned above the rotating blade devices. A pair of left and right lifters 31 are positioned above the rotating blades 22 of the rotating blade devices, extending in the front-rear direction of the lifter device. A guide plate 40 is provided between the pair of left and right lifters 31. In a side view, the guide plate 40 extends backward along the rotating blades 22 from its front end, with a predetermined gap above the rotating blades 22, and then extends upward towards the rear.

Description

Technical Field

[0001] The present invention relates to a combine equipped with a pre-harvest treatment device.

Background Art

[0002] Conventionally, in front of the threshing device of a combine, there has been known a technology including a raking device that conveys rearward while standing up the cereal straws in the field, a cutting device that cuts the base of the conveyed cereal straws, an auger device that gathers the conveyed cereal straws to one side, and a pre-harvest treatment device formed by a feeder house that conveys the gathered cereal straws to the threshing device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technology of Patent Document 1, since a lot of soil and small stones flipped up on the upper surface of the rotary blade of the cutting device scatter into the auger frame of the auger device due to the rotation of the rotary blade, there is a risk that those soil and small stones contact the cereal grains and damage the outer skin of the cereal grains, thereby degrading the quality of the harvested cereal grains.

[0005] Therefore, an object of the present invention is to propose a combine that can suppress the scattering of foreign substances such as soil and small stones flipped up on the upper surface of the rotary blade of the cutting device into the auger frame of the auger device and prevent the degradation of the quality of cereal grains.

Means for Solving the Problems

[0006] The present invention that has solved the above problems is as follows. In other words, the invention described in claim 1 is a combine harvester in which a running device (2) is provided on the lower side of the machine frame (1), a pre-harvesting device (3) is provided on the front side of the machine frame (1), and a threshing device (4) is provided behind the pre-harvesting device (3), The aforementioned pre-harvesting processing device (3) consists of a scraping device (3A) that scoops and transports the grain stalks in the field backward while making them stand upright, a cutting device (3B) that cuts the base of the transported grain stalks, an auger device (3C) that gathers the transported grain stalks to one side, and a feeder house (3D) that transports the gathered grain stalks to the threshing device (4), and the cutting device (3B) consists of a pair of left and right rotating blade devices (20) and a lifter device positioned above the rotating blade devices (20). The combine harvester is formed of (30), and a pair of left and right lifters (31) extending in the front-rear direction of the lifter device (30) are arranged above the rotating blade (22) of the rotating blade device (20), a guide plate (40) is provided between the pair of left and right lifters (31), and in a side view, the guide plate (40) extends from the front end to the upper side of the rotating blade (22) with a predetermined gap between them and the rear, and then extends upward at the rear.

[0007] The invention described in claim 2 is the combine harvester according to claim 1, wherein the guide plate (40) has a plurality of openings (43) formed at predetermined intervals in the front-rear direction and the left-right direction.

[0008] The invention described in claim 3 is the combine harvester according to claim 2, wherein the opening (43) is formed as an elongated hole that is longer in the front-to-back direction than in the left-to-right direction.

[0009] The invention described in claim 4 is the combine harvester according to claim 3, wherein the rear part of the guide plate (40) is rotatably fixed to a support shaft (35) that extends in the left-right direction and is installed on the left and right walls of the auger device (3C).

[0010] The invention described in claim 5 is the combine harvester according to claim 4, wherein, in a plan view, a notch (44) extending to the left rear is formed on the left front part of the guide plate (40), and a notch (44) extending to the right rear is formed on the right front part.

[0011] The invention described in claim 6 is a combine harvester according to claim 5, wherein, in a side view, the front end of the guide plate (40) is positioned between the front end of the rotating blade (22) and the rotating shaft (22A), and is formed to rise towards the rear from a portion close to the rear of the rotating shaft (22A) toward the upper part of the support shaft (35), and in a plan view, an insertion portion (42) for inserting the rotating shaft (22A) is formed in the portion of the guide plate (40) facing the rotating shaft (22A). [Effects of the Invention]

[0012] According to the invention described in claim 1, the pre-harvesting processing device (3) is composed of a scraping device (3A) that scrapes and conveys the grain stalks in the field backward while raising them upright, a cutting device (3B) that cuts the base of the conveyed grain stalks, an auger device (3C) that gathers the conveyed grain stalks to one side, and a feeder house (3D) that conveys the gathered grain stalks to the threshing device (4), and the cutting device (3B) is formed of a pair of left and right rotating blade devices (20) and a lifter device (30) positioned above the rotating blade devices (20) A pair of left and right lifters (31) are positioned above the rotating blade (22), extending in the front-rear direction of the lifter device (30). A guide plate (40) is provided between the pair of left and right lifters (31). In a side view, the guide plate (40) extends from its front end, above the rotating blade (22) with a predetermined gap, backward along the rotating blade (22), and then extends upward at the rear. This prevents the crops that are thrown up onto the upper surface of the rotating blade (22) from scattering into the auger device (3C), thereby preventing a decrease in the quality of harvested grain. In addition, a large space can be formed behind the gap, preventing foreign matter from clogging the gap.

[0013] According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the guide plate (40) has a plurality of openings (43) formed at predetermined intervals in the front-rear direction and the left-right direction, so that the amount of foreign matter that moves backward on the upper surface of the guide plate (40) leaks out and scatters into the auger device (3C) can be reduced.

[0014] According to the invention described in claim 3, in addition to the effects of the invention described in claim 2, the opening (43) is formed as an elongated hole that is longer in the front-to-back direction than in the left-to-right direction, so that the amount of debris scattered inside the auger device (3C) can be further reduced.

[0015] According to the invention described in claim 4, in addition to the effects of the invention described in claim 3, the rear part of the guide plate (40) is rotatably fixed to the support shaft (35) that extends in the left-right direction and is installed on the left and right walls of the auger device (3C), so that the guide plate (40) can be swung in accordance with the vertical swing of the lifter (31).

[0016] According to the invention described in claim 5, in addition to the effects of the invention described in claim 4, in a plan view, a notch (44) extending to the left rear is formed on the left front part of the guide plate (40), and a notch (44) extending to the right rear is formed on the right front part, so that the clippings that have been thrown up onto the upper surface of the rotating blade (22) can be moved in the left-right direction and discharged to the outside efficiently.

[0017] According to the invention of claim 6, in addition to the effects of the invention of claim 5, in a side view, the front end of the guide plate (40) is positioned between the front end of the rotating blade (22) and the rotating shaft (22A), and is formed to rise towards the rear from the part close to the rear of the rotating shaft (22A) toward the upper part of the support shaft (35). In a plan view, an insertion part (42) for inserting the rotating shaft (22A) is formed in the part of the guide plate (40) facing the rotating shaft (22A), so that the amount of debris that is thrown up onto the upper surface of the rotating blade (22) can be reduced. Also, since a larger space can be formed on the rear side of the gap, it is possible to further prevent debris from getting stuck in the gap. [Brief explanation of the drawing]

[0018] [Figure 1] This is a front view of a combine harvester. [Figure 2] This is a left side view of a combine harvester. [Figure 3] This is a plan view of a combine harvester. [Figure 4] This is a left side view of the scraping device. [Figure 5] It is a plan view of the cutting device. [Figure 6] It is a left side view of the cutting device. [Figure 7] It is a plan view of the guide plate. [Figure 8] It is a perspective view of the discharge auger.

Mode for Carrying Out the Invention

[0019] As shown in FIGS. 1 to 3, the general-purpose combine harvester is provided with a traveling device 2 composed of a pair of left and right crawlers that travel on the soil surface below the machine body frame 1, and a pre-cutting device 3 for harvesting the cereal straws in the field is provided in front of the machine body frame 1. A threshing device 4 for threshing and sorting the harvested cereal straws is provided on the left rear side of the pre-cutting device 3, and a cab 5 for an operator to board is provided on the right rear side of the pre-cutting device 3.

[0020] An engine room 6 for housing the engine is provided below the cab 5, a grain tank 7 for storing the threshed and sorted grains is provided behind the cab 5, and a discharge auger 8 composed of a vertical elevating part 8A for discharging the grains to the outside and a horizontal discharge part 8B extending forward from the upper part of the elevating part 8A is provided.

[0021] The pre-cutting device 3 is composed of a raking device 3A for raking and conveying the cereal straws in the field backward while standing them up, a cutting device 3B for cutting the roots of the cereal straws conveyed to the lower rear side of the raking device 3A, an auger device 3C for gathering the cereal straws with cut roots to the left, and a feeder house 3D for conveying the gathered cereal straws to the threshing device 4.

[0022] <Raking Device> As shown in FIG. 4, the raking device 3A is provided on the upper front side of the auger frame 60 of the auger device 3C. Also, it is formed to have substantially the same width as the width of the auger frame 60 in the left-right direction.

[0023] The scraping device 3A consists of a scraping reel 10 and an arm 11 that moves the scraping reel 10 up and down.

[0024] In a side view, the scraping reel 10 is formed in a roughly hexagonal shape, and tine support rods 12 extending in the left-right direction are provided at six corners, with a plurality of reel tines 13 suspended from the tine support rods 12 at predetermined intervals in the left-right direction.

[0025] A rotating shaft 14 extending in the left-right direction is mounted on the front of the arm 11, and a scraping reel 10 is supported on the rotating shaft 14. The rear of the arm 11 is rotatably fixed to the upper part of the rear wall of the auger frame 60 of the auger device 3C, and the middle part of the left wall of the auger frame 60 is connected to the arm 11 by a lifting device such as a hydraulic cylinder that swings the front of the arm 11 up and down.

[0026] <Cutting device> As shown in Figures 5-7, the cutting device 3B consists of a pair of left and right rotating blade devices 20 for cutting the base of the grain stalks, and a pair of left and right lifter devices 30 located above the rotating blade devices 20. The lifter devices 30 are devices that stand up the grain stalks that have been picked up by the picking device 3A.

[0027] The left-right spacing between the left cutting device 3B and the right cutting device 3B is set to match the spacing of the rows in the field. This allows the rotating blade device 20 to efficiently cut the grain stalks planted in each row of the field.

[0028] The rotating blade device 20 is formed from a frame 21 extending in the front-rear direction, a rotating blade 22 provided on the upper side of the front part of the frame 21, a motor 23 provided on the upper side of the rear part of the frame 21 for rotating the rotating blade 22, and a cover 24 detachably attached to the lower part of the frame 21. The rear part of the frame 21 is fixed to the lower part of the lower wall of the auger frame 60 via a connecting member 25.

[0029] The frame 21 of the rotary blade device 20 located on the left side extends from the rear towards the front right, while the frame 21 of the rotary blade device 20 located on the right side extends from the rear towards the front left.

[0030] The rotating blade 22 is positioned below the upper surface of the lower wall of the auger frame 60. This prevents a large amount of soil that comes into contact with the rotating blade 22 from entering the auger frame 60. In addition, the rotating blade 22 is positioned behind the bottom dead center of the reel tine 13 when the raking device 3A is lowered. This suppresses head loss and allows the raking device 3A to cut the base of the grain stalks and efficiently transport them to the auger frame 60.

[0031] The rotating blade 22 of the left rotating blade device 20 rotates clockwise, and the rotating blade 22 of the right rotating blade device 20 rotates counterclockwise. This prevents soil that comes into contact with the rotating blade 22 from being scattered outside the auger frame 60.

[0032] The sprocket for the rotating blade 22, supported at the bottom of the rotating shaft of the rotating blade 22, the sprocket for the motor, supported at the bottom of the rotating shaft of the motor 23, and the chains wound around both sprockets are covered by the cover 24. The rotating shafts of the rotating blade 22 and the rotating shafts of the motor 23 are inserted through the frame 21 and extend below the lower surface of the frame 21. This prevents the sprockets and chains from coming into contact with the field and prevents soil from adhering to the sprockets and chains.

[0033] The lower front portion of the cover 24 is formed with an upward slope. This prevents the front portion of the cover 24 from digging into unevenness in the field, allowing the front portion of the rotating blade device 20 to move efficiently up and down along the unevenness of the field.

[0034] The lifter device 30 is formed from a lifter 31 made of round steel and a skid 32 attached to the underside of the front part of the lifter 31.

[0035] The middle section of the lifter 31 is rotatably fixed to the support shafts 35, which extend in the left-right direction and are mounted on the left and right walls of the auger frame 60, via a connecting member 33 that extends in the front-rear direction, and the rear section of the lifter 31 is rotatably fixed to the support shafts 35 via a connecting member 34. This allows the front section of the lifter 31 to move vertically along the unevenness of the field, enabling the grain stalks picked up by the raking device 3A to be efficiently uprighted.

[0036] In a side view, the lifter 31 is formed to curve upward from its front end, located in front of the rotating blade 22 of the rotating blade device 20, to the upper side of the motor 23. This allows the grain stalks, whose bases have been cut by the rotating blade 22, to be efficiently guided to the auger device 3C.

[0037] In a plan view, the left side of the sled 32 is formed from the front end towards the rear left, and the right side of the sled 32 is formed from the front end towards the rear right. In a longitudinal section view in the left-right direction, the left side of the sled 32 is formed towards the upper left, and the right side of the sled 32 is formed towards the upper right. This allows the sled 32 to move along the unevenness of the field, preventing the front part of the lifter 31 from penetrating the field soil.

[0038] A guide plate 40 is provided between a pair of left and right lifter devices 30 located above the rotating blade device 20. This reduces the amount of grain stalks that leak into the field from the rear of the pair of left and right lifters 31, thereby suppressing head loss.

[0039] In a side view, the front end of the guide plate 40 is positioned between the front end of the rotating blade 22 and the rotation axis 22A of the rotating blade 22, and the rear end of the guide plate 40 is rotatably fixed to the support shaft 35. The guide plate 40 extends rearward along the rotating blade 22 from its front end, with a predetermined gap above the rotating blade 22, and then extends upward towards the upper part of the support shaft 35 from a point close to the rear of the rotation axis 22A of the rotating blade 22, forming an upward-sloping rear section 40A. This allows soil, pebbles, and other contaminants scooped up together with the grain stalks by the scooping reel 10 to be moved to the rear through the gap between the guide plate 40 and the rotating blade 22, preventing the contaminants from being transported to the auger frame 60. In addition, a large space is formed behind the gap, which prevents contaminants from getting stuck in the gap.

[0040] The length of the guide plate 40 in the left-right direction is shorter than the left-right distance between the lifters 31 of the pair of left and right lifter devices 30 provided above the rotating blade device 20, and the left and right ends of the guide plate 40 each have upwardly bent connecting portions 41. The connecting portions 41 are connected to connecting members 33 that support the middle portion of the lifter 31 from below. This allows the guide plate 40 to swing in accordance with the vertical rotation of the lifter 31. The front end of the guide plate 40 can also be positioned behind the rotation axis 22A of the rotating blade 22.

[0041] The part of the guide plate 40 facing the rotation axis 22A of the rotating blade 22 has an insertion portion 42 through which the upper part of the rotation axis 22A is inserted. This allows the guide plate 40 to be positioned close to the upper side of the rotating blade 22.

[0042] The guide plate 40 has multiple openings 43 formed at predetermined intervals in the front-to-back and left-to-right directions. This prevents foreign objects moving backward on the upper surface of the guide plate 40 from falling into the space below the guide plate 40 and being transported to the auger frame 60. Furthermore, it is preferable that the openings 43 are elongated holes that are longer in the front-to-back direction than in the left-to-right direction.

[0043] It is preferable to form a notch 44 extending to the left rear on the left front of the guide plate 40, and a notch 44 extending to the right rear on the right front. This allows foreign matter that has been thrown onto the upper surface of the rotating blade 22 to be moved in the left-right direction and efficiently discharged to the outside.

[0044] A regulating member 45, formed from a round steel bar and extending forward from the lower wall of the auger frame 60, is provided on the lower side of the guide plate 40. This prevents the guide plate 40 from bending significantly downwards, as it will come into contact with the regulating member 45, preventing further deformation and thus preventing a collision between the guide plate 40 and the rotating blade 22.

[0045] A rotating shaft 50 extending in the left-right direction is formed at the lower part of the lower wall of the auger frame 60, and the front part of a detection body 51 that detects the height of the auger frame 60 from the field surface, which extends downward and rearward, is fixed to the rotating shaft 50. The rotation angle of the rotating shaft 50 is detected by an angle sensor such as a potentiometer (not shown), and the height of the auger frame 60 is controlled to a predetermined height according to the measurement value of the angle sensor.

[0046] <Auger device> As shown in Figure 8, the auger device 3C consists of an auger frame 60 and scraping augers 61 mounted on the left and right walls of the auger frame 60.

[0047] Multiple raking fingers 62 that can extend and retract from the outer surface are provided on the left side of the outer surface of the raking auger 61. This allows the grain stalks with their bases cut, which have been gathered in front of the inlet of the auger frame 60, to be efficiently transported to the feeder house 3D.

[0048] Multiple conveying spirals 63 are provided on the right side of the outer surface of the raking auger 61. This allows the grain stalks that have been conveyed to the auger frame 60 to be efficiently gathered in front of the inlet.

[0049] The lower wall of the auger frame 60 is formed in a gently curving shape that protrudes downward, and an inlet (not shown) for transporting grain stalks to the feeder house 3D is formed in the part of the rear wall facing the scraping auger 61.

[0050] <Feeder House> As shown in Figure 2, the feeder house 3D connects the auger device 3C and the threshing device 4, and is a device that transports the grain stalks, which are the material to be processed, to the left side of the auger frame 60 to the threshing device 4. [Explanation of Symbols]

[0051] 1. Aircraft frame 2. Traveling device 3. Pre-harvesting treatment device 3A Scraping device 3B Cutting device 3C Auger Device 3D Feeder House 4. Threshing machine 20 Rotary blade device 22 rotary blades 30 Lifter device 31 Lifter 35 Spindle 40 Information board 42 Insertion part 43 Opening 44 Notch

Claims

1. In a combine harvester having a running gear (2) on the underside of the machine frame (1), a pre-harvesting device (3) on the front side of the machine frame (1), and a threshing device (4) behind the pre-harvesting device (3), The aforementioned pre-harvesting processing device (3) consists of a scraping device (3A) that scoops and transports the grain stalks in the field backward while making them stand upright, a cutting device (3B) that cuts the base of the transported grain stalks, an auger device (3C) that gathers the transported grain stalks to one side, and a feeder house (3D) that transports the gathered grain stalks to the threshing device (4). The cutting device (3B) is formed by a pair of left and right rotating blade devices (20) and a lifter device (30) positioned above the rotating blade devices (20), A pair of left and right lifters (31) extending in the front-rear direction of the lifter device (30) are positioned above the rotating blade (22) of the rotating blade device (20). A guide plate (40) is provided between the left and right pair of lifters (31), A combine harvester characterized in that, in a side view, the guide plate (40) extends from the front end to the upper side of the rotating blade (22) along the rotating blade (22) with a predetermined gap, and then extends upward at the rear.

2. The combine harvester according to claim 1, wherein the guide board (40) has a plurality of openings (43) formed at predetermined intervals in the front-to-back direction and the left-to-right direction.

3. The combine harvester according to claim 2, wherein the opening (43) is formed as an elongated hole that is longer in the front-to-back direction than in the left-to-right direction.

4. The combine harvester according to claim 3, wherein the rear of the guide board (40) is rotatably fixed to a support shaft (35) extending in the left-right direction, which is installed on the left and right walls of the auger device (3C).

5. The combine harvester according to claim 4, wherein, in a plan view, a notch (44) extending to the left rear is formed on the left front part of the guide plate (40), and a notch (44) extending to the right rear is formed on the right front part.

6. In a side view, the front end of the guide plate (40) is positioned between the front end of the rotating blade (22) and the rotating shaft (22A), and it is formed to rise towards the rear from the portion close to the rear of the rotating shaft (22A) toward the upper part of the support shaft (35). The combine harvester according to claim 5, wherein, in a plan view, an insertion portion (42) is formed in the portion of the guide plate (40) facing the rotation axis (22A) through which the rotation axis (22A) is inserted.

Images