JP7134007B2 - combine - Google Patents

Description

In the present invention, a threshing device for threshing harvested culms in a threshing chamber is provided, and the threshing material is threshed from one side to the other in the rotation axis direction of the threshing cylinder on the inner surface side of the top plate covering the upper part of the threshing chamber. It relates to a combine provided with a plurality of dust valves for directing and transporting.

In a conventional combine harvester, for example, as shown in Patent Document 1, there was a configuration in which all of a plurality of dust feed valves were attached to the inner surface of the top plate in a fixed position (hereinafter referred to as the first conventional technology). Further, as shown in Patent Document 2, there is also a structure in which all of the plurality of dust feed valves are swingably supported on the inner surface of the top plate so that the feed angle can be changed (hereinafter referred to as , referred to as the second prior art).

JP 2013-183717 A JP-A-6-292443

In the above-described first prior art, since the plurality of dust valves are fixed in position, the top plate can be formed in an arcuate shape along the rotation restriction of the outer end of the handling cylinder. However, in this configuration, since the feeding angle for transferring the threshing processed material in the dust feed valve is constant, when the amount of crops carried into the threshing device increases, the conveying process along the rotation axis direction of the threshing drum increases. There is a risk that the threshed material will be clogged due to insufficient capacity and will be transferred backward without being shed. , the shedding performance may decrease.

In the second prior art, by adjusting the feeding angle of the dust valve according to the change in the amount of crops carried into the threshing device, the threshed material can be transferred smoothly regardless of the fluctuations in the amount of crops. can do. However, in this configuration, in order to change the feed angle of the dust valve, the part of the top plate where the dust valve is attached must be flat, and the dust valve is rotated and transferred around as the drum rotates. There is a possibility that the threshed material cannot be transferred smoothly.

Therefore, it is desirable to maintain appropriate threshing performance according to the difference in the amount of crops carried into the threshing device, while smoothly transferring the threshed material by rotating the threshing drum. was rare.

The combine according to the present invention is characterized in that it is equipped with a threshing device for threshing harvested grain culms in a threshing chamber, and in the threshing chamber, a threshing cylinder that rotates around a front-rear axis and a threshing cylinder that rotates along the outer circumference of the threshing cylinder. An arc-shaped receiving net provided in a state and a top plate covering the upper part of the threshing chamber are provided at intervals along the rotation axis direction of the threshing drum, and the threshing material is placed in the threshing drum. a plurality of dust feed valves for transferring from one side to the other side in the direction of the rotation axis of the dust feed valve, and each of the plurality of dust feed valves is attached to the top plate in a fixed position. and a movable dust valve portion adjacent to the fixed dust valve portion in the circumferential direction and capable of changing and adjusting the feed angle by swinging. Divided along the direction into one side top plate portion located on the fixed dust valve portion side and the other side top plate portion located on the movable dust valve portion side at the split position of the laterally intermediate portion a first fixed dust valve portion provided on the inner surface of the top plate portion on the one side, and a first fixed dust valve portion which is detachably supported in the lateral direction and which is provided on the inner surface of the top plate portion on the one side; a second fixed dust valve portion extending toward the movable dust valve portion, wherein the first fixed dust valve portion is fixed to the one-side top plate portion, and the second fixed dust valve portion is fixed to the top plate portion on the one side; The point is that the dust valve portion and the movable dust valve portion are fixed to the top plate portion on the other side .

According to the present invention, since the fixed dust valve portion of the dust valve is attached to the top plate in a fixed position, there is no restriction on the shape of the top plate. Therefore, at the location where the fixed dust valve can be attached, the shape of the top plate can be such that the threshed material can be smoothly transferred along with the rotation of the threshing cylinder. By changing the feed angle of the fixed dust valve portion and the movable dust valve portion adjacent in the circumferential direction of the dust valve, it is possible to change the conveying capacity along the rotation axis of the drum. is.

As a result, the fixed dust valve allows smooth transfer of the threshed material accompanying the rotation of the threshing cylinder, while the movable dust valve allows the crop to be transported into the threshing device according to changes in the amount of crops. By adjusting the feed angle of the dust feed valve, it is easy to eliminate the disadvantage of reduced grain shedding performance regardless of fluctuations in the amount of crops.

Therefore, it is possible to smoothly transfer the threshed material by rotating it with the rotation of the threshing cylinder, while maintaining appropriate threshing performance according to the difference in the amount of crops carried into the threshing device. became.
In addition, since the fixed dust-feeding valve portion extends beyond the fixed-side corresponding portion toward the movable-side corresponding portion formed in a flat plate, the smooth transfer state of the processed material by the fixed dust-feeding valve portion is movable. Continue until the position corresponding to the side counterpart. As a result, it is possible to smoothly transfer the threshed material while avoiding hindrance to the transfer of the threshed material at the point where the top plate changes from the arc-shaped portion to the flat plate-shaped portion. Furthermore, the arc-shaped fixed-side corresponding portion and the flat plate-shaped movable-side corresponding portion can be manufactured separately, so that each member can be made small and light, and easy to handle. In addition, when performing maintenance work on the handling chamber, the entire top plate is made up of small members rather than large members, so that the top plate can be easily removed.

In the present invention, the stationary dust-feeding valve portion and the movable dust-feeding valve portion are positioned on the upper side in the rotation direction of the handling cylinder, and the fixed dust-feeding valve portion is positioned on the lower side in the transfer direction of the processed material. It is preferable that the valve portion and the movable dust valve portion overlap along the circumferential direction.

According to this configuration, of the fixed dust valve portion and the movable dust valve portion, the dust valve portion positioned on the upper side in the rotation direction of the threshing drum thresh before the dust valve portion positioned on the lower side. It comes into contact with the material to be processed and exhibits its feeding function. Since the dust valve located on the upper side in the direction of rotation is located on the lower side in the direction of material transfer and overlaps, the threshed material transported and guided by the valve is positioned on the upper side in the direction of material transfer. It is possible to transfer smoothly without being stuck at the stepped portion with the valve portion.

In the present invention, the fixed dust valve portion is positioned on the upper side in the rotational direction, and the movable dust valve portion is positioned on the lower side in the rotational direction, and the movable dust valve portion is positioned on the lower side in the rotational direction. It is preferable that the feed angle can be changed and adjusted by rotating around a pivot point located at the upper end in the rotation direction.

According to this configuration, the movable dust valve portion overlaps with the fixed dust valve portion in the circumferential direction in a state of being located on the downstream side in the rotational direction and on the upstream side in the transfer direction of the processed material. And it swings centering on the rotation fulcrum provided in the overlapping location. Since the rotation fulcrum is located on the side opposite to the side that contacts the threshed material, the threshed material is smoothly transferred without coming into contact with the rotation fulcrum.

In the present invention, it is preferable that the one-side top plate portion is formed in an arc shape along the circumferential direction, and the other-side top plate portion is formed in a flat plate shape.

According to this configuration, the top plate on one side of the top plate is formed in an arc shape, so that the threshed material can be transferred smoothly over a long range as the threshing cylinder rotates. can. On the other hand, since the top plate portion on the other side is formed in a flat plate shape, the feed angle of the movable dust valve portion can be adjusted smoothly.

It is the whole combine side view. It is the whole combine top view. It is a side view which shows the support structure of a threshing apparatus. It is a front view of a threshing device. It is a front view of a threshing entrance plate arrangement part. It is sectional drawing which shows the connection state of a threshing inlet plate. It is a longitudinal front view of a threshing device. It is a longitudinal front view of the principal part of a threshing device. It is a vertical side view which shows a top-plate support structure. It is a top view which shows the attachment state of a dust-sending valve. It is the bottom view which looked at the top plate from the lower side. It is a side view of the threshing device in a state where the divided top plate and the dividing wall are partly removed.

BEST MODE FOR CARRYING OUT THE INVENTION A case where an embodiment of a combine according to the present invention is applied to a common combine will be described below with reference to the drawings.

〔overall structure〕
As shown in FIGS. 1 and 2, the combine has a harvesting and conveying section 1 that cuts crops and conveys them backward, an operating section 3 covered with a cabin 2, and a threshing process for the crops cut by the harvesting and conveying section 1. a threshing device 4, a grain tank 5 for storing grains obtained by threshing in the threshing device 4, a driving unit 7 having an engine 6 as a power source, a non-steerable and rotationally driven left and right It has a pair of front wheels 8 and a pair of left and right rear wheels 9 that can be steered. On the left side of the grain tank 5, a screw conveyor-type grain discharging device H is provided for conveying the stored grains to the outside of the machine body.

In this embodiment, when defining the longitudinal direction of the aircraft, it is defined along the traveling direction of the aircraft in the working state, and when defining the horizontal direction of the aircraft, left and right are defined when viewed in the traveling direction of the aircraft. . 1 and 2 is the front side of the fuselage, and the direction indicated by the code (B) in FIGS. 1 and 2 is the rear side of the fuselage. The direction indicated by the symbol (L) in FIG. 2 is the left side of the fuselage, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the fuselage.

The reaping/conveying unit 1 is supported at the front part of the machine body so as to be driven up and down around a horizontal fulcrum P1 by a reaping/elevating cylinder 10 as an elevating actuator. The harvesting and conveying unit 1 has a harvesting header 11 that harvests crops to be planted and gathers the harvested crops in the center in the cutting width direction, and directs the harvested crops gathered in the center to the threshing device 4 at the rear of the machine body. and a feeder 12 for conveying.

The reaping header 11 includes a rotating reel 13 for raking the crop to be reaping with the tip side facing backward, a clipper-type cutting blade 14 for cutting and reaping the crop by cutting the root of the crop, and a center of the cut crop in the cutting width direction. A lateral feeding auger 15 or the like is provided for collecting the parts.

Although not shown, the feeder 12 has a pair of left and right endless rotatable chains wound around the front and rear wheels in a cylindrical transport case 16, and a plurality of locking transporters are attached to each endless rotatable chain. A transport conveyor is provided, and is configured to transport crops transferred from the harvesting header 11 rearward and upward.

The threshing device 4 is located at a low position in the center in the left-right direction of the machine body, and above the threshing device 4, the grain tank 5 is positioned on the front side of the machine body, and the engine 6 as a power source is positioned on the rear side of the machine body. The grain tank 5 and the engine 6 are arranged in the longitudinal direction. The right and left outer sides of the threshing device 4 are covered with exterior covers 17 . Although not described in detail, the upper part of the exterior cover 17 is supported by a pivotal support 18 extending in the front-rear direction so that it can be opened and closed by swinging. It is configured.

As shown in FIGS. 1 and 3, a pair of left and right main frames 20 extending in the front-rear direction of the fuselage are provided in the lower portion of the fuselage. The left and right main frames 20 support the entire fuselage, and the main frames 20 correspond to the fuselage frame.

The left and right main frames 20 are made of channel material having a substantially C-shaped cross section, and are elongated in the front-rear direction from the front part to the rear part of the fuselage. Axle shafts 8 a and 9 a of the left and right front wheels 8 and the left and right rear wheels 9 are provided at positions lower than the left and right main frames 20 . The left and right front wheels 8 and the left and right rear wheels 9 are provided in a state of being positioned on the outer side in the left and right direction of the body of the left and right main frames 20, respectively. 9 is supported.

[Threshing device]
Next, the threshing device 4 will be described.
As shown in FIGS. 3, 4 and 7, the threshing device 4 includes a threshing unit 21 that performs a threshing process, and a sorting unit 22 that sorts the processed material after the threshing process by the threshing unit 21. It is A threshing chamber 23 is formed inside the threshing part 21 for shaving the harvested grain culms. Although not described in detail, the sorting unit 22 sorts out grains, grains with branches, etc., while swinging and transferring the processed material after the shedding process into the internal space surrounded by the rectangular peripheral wall. A sorting processing unit 24 (see FIG. 7) is provided for sorting into secondary products, waste straw scraps, and the like. On the rear side of the machine body of the threshing device 4, a shredding device 25 for shredding the threshed material (such as waste straw waste) after threshing by the threshing device 4 is provided.

As shown in FIGS. 3, 4 and 7, the threshing section 21 is placed and supported on the left and right main frames 20 . The threshing part 21 includes plate-shaped left and right side wall portions 26 and 27 as left and right vertical support portions extending along the vertical direction, and substantially plate-shaped rear end portions that connect the rear end portions of the left and right side wall portions 26 and 27 to each other. A wall 28, a substantially plate-like front wall 29 connecting the front ends of the left and right side walls 26, 27, a top plate 30 extending over the left and right side walls 26, 27 and covering the upper part, etc. It has an enclosed structure. The front wall portion 29 and the rear wall portion 28 are formed with openings through which the threshed material passes.

The threshing part 21 is configured such that the front part of the threshing part is narrow in the vertical direction and the rear part of the threshing part is widened in the vertical direction. The lower end portion is placed on a main frame 20 extending in a substantially horizontal posture along the front-rear direction. Therefore, the upper end portion of the threshing section 21 is in a rearwardly ascending slanted posture in which the position becomes higher toward the rear side.

As shown in FIG. 7, the right side wall portion 26 located on the right side of the left and right side wall portions 26 and 27 has a shape that is continuous in the vertical direction. As shown in FIG. 3, the left side wall portion 27 located on the left side is formed in a substantially triangular shape in a side view so that the front side of the body is narrow in the vertical direction and the rear side of the body is widened in the vertical direction. A lower side wall portion 31 and an upper side wall portion 32 having substantially the same width along the front-rear direction are provided.

The right side wall portion 26 is bolted to the main frame 20 with its lower end placed on the upper surface of the main frame 20 . A lower side wall portion 31 of the left side wall portion 27 is bolted to the main frame 20 with its lower end placed on the upper surface of the main frame 20 . The upper side wall portion 32 of the left side wall portion 27 is bolted with its lower end placed on the upper end of the lower side wall portion 31 . As shown in FIGS. 7 and 8, the upper end of upper side wall portion 32 is bolted to fixed bracket 33 .

As shown in Figs. A receiving net 35 formed in a substantially arc shape when viewed from the front is provided along the outer peripheral portion. In the handling chamber 23 , harvested grain culms are put in from the front side of the machine body, and grain shedding is performed by the handling cylinder 34 and the receiving net 35 . The handling cylinder 34 is disposed in a rearward rising inclined posture so that the rotational axis X becomes higher toward the rear side of the machine body. The receiving net 35 is arranged in a rearward rising inclined posture in a side view, similarly to the handling cylinder 34. - 特許庁

[Divided structure of top plate]
As shown in FIGS. 3 and 4, the top plate 30 is composed of a plurality of split top plates 36 that are split along the rotation axis direction of the handling cylinder 34 . A support frame 38 extending from one lateral side of the threshing device 4 to the other is provided at each of the dividing boundaries 37 between the plurality of divided top plates 36 . The support frame 38 is composed of a vertically oriented plate-like body, and specifically, six of them are provided. Five divided top plates 36 divided by six support frames 38 are separately provided so as to be attachable and detachable along the horizontal direction.

As shown in FIGS. 7 and 8 , the top plate 30 covering the upper side of the handling chamber 23 , specifically, each of the plurality of divided top plates 36 is arranged so as to substantially follow the rotation trajectory of the outer end of the handling cylinder 34 . , is provided in a substantially curved shape when viewed from the front. Each split top plate 36 is composed of two top plate structures 39 and 40 split along the circumferential direction of the handling cylinder 34 . Of the two top plate structures 39 and 40, the right top plate structure 39 as one side top plate portion corresponding to the right half is formed in a smooth circular arc shape. A left top plate structure 40 as the other top plate portion corresponding to the left half has a shape in which a flat plate is bent at two points to have three flat plate portions.

The right top plate structure 39 is bolted to a fixed bracket 41 fixed to the support frame 38 at its right end. The right top plate structure 39 is configured such that both front and rear sides thereof are positionally held by arc-shaped rail portions 42 provided on the side surfaces of the support frame 38 . The rail portion 42 has an inner rail portion 42a on the inner peripheral side and an outer rail portion 42b on the outer peripheral side. It is slidably supported in the state.

At the left end of the right top plate structure 39, the left top plate structure 40 is bent outward into a substantially L shape to receive the end of the left top plate structure 40, and is regulated from above by a contact member 43. A locking portion 39a is formed. As shown in FIG. 4, the abutment member 43 is provided in a state of extending long in the front-rear direction so as to abut on each of the five divided top plates 36 from above. is fixed with bolts.

As shown in FIGS. 7 and 8, the left top plate structure 40 has vertical mounting surfaces 40a formed on both front and rear ends thereof. It is bolted and fixed to the support frame 38 . The left top plate constituents 40 located on both front and rear sides of the support frame 38 are fixed to each other by bolts with the support frame 38 interposed therebetween. A left outer end portion of the left top plate structure 40 is bolted to the fixed bracket 33 .

As shown in FIG. 10, the squeezing cylinder 34 has a raking portion 44 located at the front end side for raking in the harvested grain culms, and a raking portion 44 located at the rear side of the raking portion 44 for shaving and processing the harvested grain culms. A processing unit 45 is provided. The raking part 44 is configured to rake the harvested grain culms sent from the feeder 12 into the hull chamber 23 by the spiral blades 46 . The shaving portion 45 is provided with a plurality of rod-shaped members 47 spaced apart in the circumferential direction, and each rod-shaped member 47 is provided with a plurality of rod-shaped shaving teeth 48 projecting radially outward. there is

Of the top plate 30, five divided top plates 36 corresponding to the treating portions 45 are detachably provided along the lateral direction. An upper surface 49 corresponding to the raking portion 44 of the handling drum 34 has a continuous shape in the circumferential direction and cannot be attached or detached along the lateral direction. This is because the receiving net 35 does not exist in this area, and the frequency of maintenance work is low.

The top plate 30 configured as described above can be removed outward toward the left side of the fuselage as an example of one side in the lateral direction of the fuselage. When removing the top plate 30, first, the bolt connection of the left top plate structure 40 to the support frame 38 is released, and the left top plate structure 40 can be removed outward from the fuselage left side. Next, the bolt connection of the right top plate structure 39 to the fixed bracket 41 is released. At this time, the work is performed through an opening formed at an appropriate location in the right side wall portion 26 . After releasing the bolt connection, it can be slid outwardly on the left side of the machine body along the rail portion 42 and removed outwardly to the left side.

[Divided structure of side wall]
As shown in FIG. 3, the upper side wall portion 32 of the left side wall portion 27 is provided at a position corresponding to the lower portion of the handling cylinder 34 and the receiving net 35 in side view. The upper side wall portion 32 is composed of a plurality of dividing walls 51 divided along the rotation axis direction of the handling cylinder 34 . The partition walls 51 are detachably supported along the lateral direction.

The dividing wall 51 is divided at the same position as the top plate 30 along the direction of the rotation axis, and can be attached and detached in the same direction as the top plate 30, that is, toward the left side of the machine body. In addition, as described above, the dividing wall 51 (upper side wall portion 32) is bolted on both upper and lower sides, and can be removed outward to the left by releasing the bolted connection. . Incidentally, as shown in FIGS. 3 and 4, a pair of vertical frames 52 are provided on the left lateral side of the threshing device 4 while being erected from the main frame 20 . and the dividing wall 51 laterally adjacent to it, a gap is formed, through which the dividing wall 51 can be removed.

[Divided structure of receiving network]
The receiving net 35 is composed of a plurality of divided receiving nets 53 divided along the rotation axis direction of the handling cylinder 34 . The divided receiving net 53 is detachably supported along the lateral direction. The receiving net 35 is divided at the same position as the top plate 30 along the rotation axis direction of the handling cylinder 34, and can be attached and detached in the same direction as the top plate 30, that is, toward the left side of the fuselage.

The receiving net 35 is provided at a location corresponding to the four divided top plates 36 positioned on the front side among the five divided top plates 36 , and four divided receiving nets 53 are provided. The receiving net 35 is provided in a substantially curved shape when viewed from the front so as to substantially follow the rotational trajectory of the outer end of the handling cylinder 34 . Each divided receiving net 53 is composed of two receiving net components 54 and 55 divided along the circumferential direction of the handling cylinder 34 .

The right receiving net structure 54 is received and guided by an arc-shaped guide member 56 attached to the front and rear side surfaces of the support frame 38, and is supported with the right end abutting against the right fixing bracket 33. there is The left end portion is bolted to a relay bracket 57 provided at the connecting portion of the left and right receiving net structures 54 and 55 . The left receiving net structure 55 is bolted to the relay bracket 57 at its right end and bolted to the fixed bracket 41 at its left end. Further, the left and right intermediate portions are bolted to the support frame 38 . The connection points to the support frame 38 are fastened and fixed together with the receiving net structure 55 adjacent to the support frame 38 therebetween.

Therefore, the left receiving net structure 55 can be removed outward to the left by releasing the connection with the plurality of bolts. After removing the left receiving net structure 55, the right receiving net structure 54 can be removed by releasing the bolt connection to the relay bracket 57. FIG.

As shown in FIG. 5, the culms transported by the feeder 12 are threshed at the front part of the machine body corresponding to the raking part 44 of the threshing cylinder 34 and corresponding to the lower side of the upper surface 49. A threshing inlet plate 59 is provided which guides to the loading inlet of the device 4 . The threshing entrance plate 59 has a side portion 60 covering both left and right sides of the raking portion 44 of the threshing drum 34 and a bottom portion 61 formed in a shape gradually widening from the outlet of the feeder 12 to the diameter of the threshing drum 34 . are provided. The bottom portion 61 is divided by a separation surface in the central portion in the left-right direction.

Therefore, the threshing inlet plate 59 is configured to be divided into four portions, left and right side portions 60 and left and right bottom portions 61 . The left side surface portion 60 and the left bottom surface portion 61 are bolted while partially overlapping each other. The right side surface portion 60 and the right bottom surface portion 61 are bolted while partially overlapping each other. As shown in FIG. 6, the head of the bolt Bo is formed with a hexagonal hole that can be engaged with a hexagonal wrench. The left and right side portions 60 and the upper surface 49 are bolted by flange connection. The threshing inlet plate 59, even if worn by the crop flow, can be easily removed by releasing the bolted connection. The left and right side portions 60 can be removed laterally, and the left and right bottom portions 61 can be removed toward the front side of the machine body with the feeder 12 removed.

[Grain tank and engine support structure]
As shown in FIGS. 4, 7, and 12, on both lateral sides of the threshing device 4, upper portions extending along the rotation axis direction of the threshing cylinder 34 (body longitudinal direction) across the upper portions of the plurality of support frames 38 A frame 62 is provided. The upper frame 62 is configured in a rearward rising inclined posture, and is configured such that the upper surface thereof is widened in the left-right direction. The grain tank 5 and the engine 6 are mounted and supported on the left and right upper frames 62 . A pair of front and rear vertical frames 52 are provided on the left lateral side of the threshing device 4 so as to be erected from the main frame 20 .

As shown in FIG. 3, the bottom surface of the grain tank 5 is formed in a downwardly tapering shape, and the bottom surface of the front part in a backward downwardly inclined posture is supported by the front part side support frame 63, and the rear side is supported by the rear side support frame 64. The front support frame 63 extends over both left and right sides of the threshing device 4 and is mounted and supported by the left and right upper frames 62 and connected with bolts. Similarly to the front support frame 63 , the rear support frame 64 extends over both left and right sides of the threshing device 4 and is supported by the left and right upper frames 62 .

The rear support frame 64 is provided with left and right tank side support portions 65 positioned on both left and right sides, and tank left and right connecting portions 66 connecting the left and right tank side support portions 65 to each other. The left and right tank lateral support portions 65 are formed in substantially trapezoidal frame shapes when viewed from the side, and are mounted and supported by the left and right upper frames 58 .

An engine support frame 67 that supports the engine 6 extends over both left and right sides of the threshing device 4 and is supported by the left and right upper frames 62 . The engine support frame 67 is provided with left and right side vertical surfaces 68 extending in the front-rear direction on the upper sides of the left and right upper frames 62 and horizontal connecting members (not shown) connecting them.

[Dust feed valve]
The threshing chamber 23 is positioned on the inner surface side of the top plate 30 and transfers the threshed material from one side (body front side) of the threshing drum 34 toward the other side (body rear side) in the rotation axis direction. A dust valve 70 is provided. As shown in FIGS. 10 and 11, the dust feed valve 70 extends from a position corresponding to the front end portion of the handling drum 34 to a region on the rear side of the handling drum 34 where the receiving net 35 is not provided. , are arranged in a state of being spaced apart in the direction of the rotation axis. A plurality of dust feed valves 70 are attached to the inner surface of the top plate 30 and extend spirally while being positioned on the outer peripheral side of the handling cylinder 34 . In other words, the dust feed valve 70 is arranged in such a manner that the position of the dust valve 70 changes toward the rear side of the handling cylinder 34 as the position changes from the upper side to the lower side of the handling cylinder 34 in the circumferential direction. It is provided in a state having a predetermined feed angle so as to transfer the threshed material to the rear side of the machine body.

Each of the plurality of dust valves 70 includes a fixed dust valve portion 71 attached to the top plate 30 in a fixed position, and a fixed dust valve portion 71 adjacent to the fixed dust valve portion 71 in the circumferential direction and swinging to change the feed angle. A movable dust valve portion 72 is provided which is adjustable to change the air pressure. As shown in FIG. 8, the stationary dust valve portion 71 is positioned on the upper side in the rotational direction of the handling cylinder 34, and the movable dust valve portion 72 is positioned on the lower side in the rotational direction. In addition, the fixed dust valve portion 71 and the movable dust valve portion 72 are arranged in the circumferential direction in a state where the fixed dust valve portion 71 is located on the downstream side of the movable dust valve portion 72 in the transfer direction of the processed material. provided in duplicate.

More specifically, as shown in FIG. 8, both the fixed dust valve portion 71 and the movable dust valve portion 72 have their mounting surfaces connected along the plate surface of the top plate 30 and perpendicular to it. It is configured to have a substantially L-shaped cross section with a feeding action surface 74 extending in a state of being aligned. As shown in FIG. 8, the handling cylinder 34 is configured to rotate clockwise when viewed from the front. Only the feed action surface 74 is formed to extend from the downstream side (the right side in FIG. 8) of the fixed dust valve portion 71 in the rotation direction, and the downstream side of the movable dust valve portion 72 in the transfer direction of the material to be treated, that is, the machine body. They are provided so as to overlap each other in the circumferential direction while being located on the rear side in the front-rear direction.

The fixed dust valve portion 71 consists of a first fixed dust valve portion 71a fixed to the inner surface of the right top plate component 39 and an inner surface of the flat plate portion 40A located on the right side of the left top plate component 40. and a fixed second fixed dust valve portion 71b. The connection point between the first fixed dust valve portion 71a and the second fixed dust valve portion 71b is also on the downstream side in the rotation direction of the first fixed dust valve portion 71a, like the overlapping portion with the movable dust valve portion 72. At the point (on the right side of FIG. 8), only the feeding action surface 74 is formed to extend, and is located downstream of the second fixed dust valve portion 71b in the transfer direction of the processed material, that is, on the rear side in the longitudinal direction of the machine body. are provided so as to overlap each other in the circumferential direction.

The movable dust valve portion 72 is attached to the inner surface of the flat plate portion 40B located on the left side of the left top plate structure 40 . The right side top plate structure 39 corresponds to the fixed side corresponding portion, the left side top plate structure 40 corresponds to the movable side corresponding portion, and the fixed side corresponding portion is formed longer than the movable side corresponding portion. Moreover, the fixed dust valve portion 71 extends over the right side top plate structure 39, which is the fixed side corresponding portion, toward the movable side corresponding portion along the circumferential direction.

The movable dust valve portion 72 is rotatably supported by the top plate 30 about the rotation fulcrum P at a portion overlapping the second fixed dust valve portion 71b, which is the upper end in the rotational direction. An end portion of the movable dust valve portion 72 on the downstream side in the rotational direction (the side opposite to the second fixed dust valve 71b) is configured to be manually operated via an adjustment member 75 so that the swing angle can be changed and adjusted. there is

More specifically, the movable dust valve portion 72 is supported by a support shaft 76 with respect to the top plate 30 at its upper end in the rotational direction. An adjustment member 75 is bolted to the downstream end in the rotational direction. The adjustment member 75 is configured to be manually slidable within the range of the long hole 77 . When the bolt is loosened and the adjustment member 75 is slid, the movable dust valve portion 72 is swung around the axis (rotational fulcrum) of the support shaft 76 to change and adjust the feed angle for transporting the threshed material. can do. After changing the feed angle, the position can be fixed by tightening the bolt.

[Another embodiment]
( 1 ) In the above-described embodiment, the fixed dust-feeding valve portion 71 is positioned downstream of the movable dust-feeding valve portion 72 in the material transfer direction. The valve portion 71 may be provided in a state in which it is located on the upper side in the transfer direction of the processed material relative to the movable dust feed valve portion 72 .

( 2 ) In the above embodiment, the top plate 30 is composed of five divided top plates 36 divided along the rotation axis direction of the handling cylinder 34, and each of the five divided top plates 36 is , two top plate structures 39 and 40 divided along the circumferential direction of the handling drum 34 have been shown, but instead of this structure, for example, four or less, six or more divided top plates may be used. It may be composed of a plate, or the divided top plate may be composed of three or more top plate structures.

( 3 ) In the above embodiment, the receiving net 35 and the side wall portion 27 are divided along the rotation axis direction at the same position as the top plate 30, and are removable in the same direction as the top plate 30. However, instead of this configuration, it may be divided along the rotation axis direction at a position different from the top plate 30, or may be configured to be removable in a direction different from the top plate 30. . Also, the receiving net and the side wall may be configured so as not to be separated.

( 4 ) In the above embodiment, the grain tank 5 and the engine 6 are arranged above the threshing device 4. Instead of this structure, the grain tank 5 and the engine 6 may be arranged side by side with the threshing device 4.

The present invention can be applied not only to ordinary combine harvesters but also to self-threshing combine harvesters.

4 threshing device 5 grain tank 6 engine 23 threshing chamber 30 top plate 34 threshing barrel 35 receiving net 39 fixed side corresponding portion (one side top plate portion) (top plate structure)
40 Movable side corresponding portion (other side top plate portion) (Top plate structure)
70 dust feed valve 71 fixed dust feed valve portion
71a First fixed dust feed valve portion
71b Second fixation
72 movable dust valve part

Claims (4)

A threshing device for threshing harvested grain culms is provided in the threshing chamber,
In the handling chamber, a handling cylinder that rotates about a front-rear axis, an arc-shaped receiving net provided along the outer periphery of the handling cylinder, and a top plate covering the upper part of the handling chamber. a plurality of dust feed valves provided at intervals along the direction of the rotation axis of the threshing cylinder and transferring the threshed material from one side to the other side in the direction of the rotation axis of the threshing cylinder;
Each of the plurality of dust valves includes a fixed dust valve portion attached to the top plate in a position-fixed state, and a fixed dust valve portion that is adjacent to the fixed dust valve portion in the circumferential direction and that swings to change the feed angle. and an adjustable movable dust valve portion ,
Along the circumferential direction of the handling drum, the top plate is divided at a laterally intermediate portion, and is divided into one top plate portion located on the fixed dust valve portion side and one side top plate portion located on the movable dust valve portion side. can be divided into the other side top plate portion located, and is detachably supported in the lateral direction,
The fixed dust valve portion includes a first fixed dust valve portion provided on the inner surface of the one-side top plate portion and a second portion extending from the divided position toward the movable dust valve portion. a fixed dust valve portion, and
A combine harvester in which the first fixed dust valve portion is fixed to the one side top plate portion, and the second fixed dust valve portion and the movable dust valve portion are fixed to the other side top plate portion . The fixed dust valve portion and the movable dust valve portion are positioned on the upper side in the direction of rotation of the handling drum of the fixed dust valve portion and the movable dust valve portion. The combine according to claim 1, wherein the dust valve portion overlaps along the circumferential direction. The fixed dust valve portion is positioned on the upper side in the rotational direction, and the movable dust valve portion is positioned on the lower side in the rotational direction,
3. The combine according to claim 2, wherein the movable dust valve portion is capable of changing and adjusting the feed angle by rotating around a pivot point located at the upper end in the rotational direction. The one-side top plate portion is formed in an arc shape along the circumferential direction,
The combine according to any one of claims 1 to 3, wherein the other side top plate portion is formed in a flat plate shape.

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