JP7033521B2 - combine - Google Patents

Description

The present invention relates to a combine.

In a combine harvester equipped with a straw-cutting device at the lower rear of the threshing device, a pair of rotary blades with disc blades arranged side by side and supported by a horizontal axis are placed facing each other in a state where the straw is cut by the speed difference between them. It has been disclosed.

However, it is mainly the outermost peripheral edge of the disc blade that acts on the culm (straw), and the feeding action is small.

Japanese Unexamined Patent Publication No. 7-115841

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combine provided with an culm processing apparatus having an improved culm feeding action and an enhanced cutting processing capacity.

The combine according to the present invention includes a culm processing device that processes culms in the lower rear part of the threshing device.
The waste disposal device has a plurality of cutting blades arranged spirally at intervals in the axial direction of the drive shaft to which rotational power from the drive source is transmitted, and free rotation arranged in parallel with the drive shaft. It has a plurality of disc blades arranged at intervals in the axial direction of the free rotation axis, and cuts the exhaust between the cutting blades and the disc blades arranged alternately. be.

According to this configuration, since a plurality of cutting blades rotated by the drive shaft are arranged in a spiral shape, the feeding action of the culm is improved as compared with the conventional (for example, Patent Document 1) disc blade. The cutting processing capacity can be increased.

In the present invention, a plate-shaped frame arranged below the cutting blade and above the free rotation axis is further provided.
A part of the disk blade may be one protruding from a slit provided in the frame.

According to such a configuration, it is possible to prevent the culm from being wrapped around the free rotation shaft. Further, since the disk blade is supported by the frame, it is possible to prevent the disk blade from tilting in the left-right direction. Further, since the culm is guided by the frame and appropriately conveyed to the cutting processing position between the cutting blade and the disc blade, the cutting processing capacity can be enhanced.

In the present invention, the front end of the rotation locus of the cutting blade may be located in front of the front end of the disk blade.

According to such a configuration, since the culm carried out from the threshing device comes into contact with the cutting blade before the disc blade, the culm is conveyed without staying in the culm processing device.

In the present invention, the free rotation axis may have a polygonal cross-sectional shape, and the disk blade may have a polygonal insertion hole to be inserted through the free rotation axis.

According to this configuration, since the disc blade does not freely rotate with respect to the free rotation shaft, the rotational force of the disc blade generated by the contact of the culm is appropriately transmitted to the free rotation shaft. As a result, since all the disc blades rotate at the same time, it is possible to prevent the occurrence of a state in which some of the disc blades do not rotate, and the feeding action of the culm is enhanced.

Left side view of combine Right side view of the combine Plan view of combine Vertical cross-sectional view showing a threshing device and a sorting device Perspective view of the shredding device An exploded perspective view of the free rotary blade Longitudinal section of the shredding device Schematic diagram showing the transmission structure of the combine Partial enlarged view of the second wall insert and the second conveyor

An example of the combine according to the present invention will be described.

[Overall structure of combine harvester]
First, the overall structure of the combine will be briefly explained. 1 to 3 show the left side surface, the right side surface, and the plane of the combine 100 of the present embodiment, respectively. In the figure, the front-back direction, the left-right direction, and the up-down direction of the combine 100 are indicated by arrows. The combine 100 includes a traveling device 1, a cutting device 2, a transport device 2a, a threshing device 3, a sorting device 4, a storage device 5, and a power device 6. Further, the combine 100 of the present embodiment is provided with a shredding device 7 (corresponding to a threshing treatment device) for shredding the culm, which is a threshing processed product to be discharged to the outside.

The traveling device 1 is provided below the machine frame 10. The traveling device 1 includes a transmission 11 and a pair of left and right crawler devices 12. The transmission 11 transmits the power of the engine 61 mounted on the airframe frame 10 to the crawler device 12. The crawler device 12 causes the combine 100 to travel in the front-rear direction and turns the combine 100 in the left-right direction.

The cutting device 2 is provided in front of the traveling device 1. The cutting device 2 has a reel 21, a cutter (cutting blade) 22, and an auger (horizontal feed screw) 23. Further, the transfer device 2a provided behind the cutting device 2 has a transfer conveyor 24 and a front rotor 25 (see FIG. 4). The reel 21 guides the grain culm in the field to the cutter 22 by rotating. The cutter 22 cuts the grain guided by the reel 21. The auger 23 collects the culms cut by the cutter 22 at a predetermined position. The transport conveyor 24 transports the grain culms collected by the auger 23 to the front rotor 25. The front rotor 25 sends the grain culms conveyed by the transfer conveyor 24 to the threshing device 3.

The threshing device 3 is provided behind the harvesting device 2. The threshing device 3 has a handling chamber 30 for accommodating the handling cylinder 31, a handling cylinder 31 that rotates around a handling cylinder shaft 311 rotatably provided with respect to the front and rear walls of the handling chamber 30, and a handling cylinder 31 downward. It has a receiving net 32 (see FIG. 4) covering from. A side cover 33 that covers the left side of the handling cylinder 31 is attached to the left side of the threshing device 3. The handling cylinder 31 rotates to carry the culm backward while threshing the culm. The receiving net 32 supports the grain culm conveyed by the handling cylinder 31, and drops the threshing device into the sorting device 4. Below the handling cylinder 31, a first conveyor 143 and a second conveyor 144 (see FIG. 4), which are screw conveyors for transporting grains, are provided. All of these transport the threshed grains in the horizontal direction (horizontal direction).

The sorting device 4 is provided below the threshing device 3. The sorting device 4 has a swing sorting body 41 that sorts threshed grains that have fallen from the handling cylinder 31, and a wall insert 42 that is a blower. The rocking sorter 41 sifts threshing to sort grains. The grains sorted by the rocking sorter 41 are conveyed by the first conveyor 143 and the frying conveyor 151, and are charged into the grain tank 51 via the charging port 153. The wall insert 42 blows away impurities such as straw debris contained in threshing. Contaminants such as straw debris are shredded by a shredding device 7 provided behind the sorting device 4 and discharged to the outside from the culm outlet 721.

The storage device 5 is provided on the right side of the threshing device 3 and the sorting device 4. Therefore, the threshing device 3, the sorting device 4, and the storage device 5 are arranged in parallel on the left and right above the traveling device 1. The storage device 5 includes a grain tank 51 for storing grains. The grain tank 51 stores the grains conveyed from the sorting device 4 via the first conveyor 143 and the grain raising conveyor 151. When discharging the grains in the grain tank 51, the discharge auger 52 is used. The discharge auger 52 is configured to be rotatable in the vertical and horizontal directions, and the grains can be discharged to any place.

The power device 6 is provided below the operating unit 13 and in front of the storage device 5. The power unit 6 is composed of an engine 61. The engine 61 of the present embodiment is a diesel engine, and converts heat energy obtained by burning fuel into kinetic energy. More specifically, the engine 61 converts the heat energy obtained by burning the fuel into the power for driving each part such as the traveling device 1. The power device 6 may be an electric motor that generates power by electricity. Further, the power unit 6 may include both an engine 61 and an electric motor.

The driving unit 13 is provided in front of the Glen tank 51 on the right front side of the airframe frame 10. In the driver unit 13, a driver's seat 14 on which the operator sits and a steering handle 15 arranged in front of the driver's seat 14 are installed, and various operating tools such as a speed change lever, a clutch lever, and switches are installed around them. Is placed.

[Threshing device]
As described above, the threshing device 3 has a handling chamber 30, a handling cylinder 31, and a receiving net 32. As shown in FIG. 4, the handling chamber 30 is partitioned by a receiving net 32, a machine frame 300, an upper cover 301, a grain culm guide member 302, and the like. The machine frame 300 includes a front wall member 303 arranged in front of the handling cylinder 31, a rear wall member 304 arranged behind the handling cylinder 31, and a right side wall member 305 arranged on the right side of the handling cylinder 31. including. The upper cover 301 is arranged so as to cover the handling cylinder 31 from above, and is attached to the machine frame 300 so as to be openable and closable. The grain culm guide member 302 is provided in a posture of tilting upward toward the rear, and guides the grain culm sent by the front rotor 25 to the receiving net 32.

The handling cylinder 31 has a handling cylinder shaft 311 extending in the front-rear direction, a scraping screw 312, and a tooth bar (tooth handling support member) 313. The rotational power from the engine 61 is transmitted to the handling cylinder shaft 311 which is the driving shaft of the handling cylinder 31 by a transmission structure described later. The scraping screw 312 is arranged at the front portion of the handling cylinder 31, and a plurality of tooth bars 313 are arranged in parallel behind the scraping screw 312 around the handling cylinder shaft 311.

The handling barrel shaft 311 is a linearly formed structure, and supports the scraping screw 312 and the plurality of tooth bars 313. The handling barrel shaft 311 is rotatably supported by the front wall member 303 and the rear wall member 304 forming the handling chamber 30. Further, the front end portion of the handling barrel shaft 311 projects forward from the front wall member 303.

The scraping screw 312 is a structure in which a spiral impeller (scraping blade) 312b is detachably formed. The scraping screw 312 scrapes the culm sent by the front rotor 25. That is, the scraping screw 312 takes in the grain culm sent by the front rotor 25 and sends it out to the rear by rotating. The scraping screw 312 is not limited to the structure in which the spiral impeller 312b is formed, and may be a structure in which a plurality of blades are formed.

The tooth bar 313 is a structure in which a plurality of handling teeth 313t are arranged in parallel at predetermined intervals. The tooth bar 313 threshs the culm sent out by the scraping screw 312. That is, the tooth bar 313 rotates to knead the culm sent out by the scraping screw 312 and hit it again to drop threshing. A part of the grain culm and dust that have been threshed by the handling cylinder 31 flow down to the rear of the handling cylinder 31 and are discharged from the rear of the threshing device 3. The tooth bar 313 is not limited to a structure having a plurality of handling teeth 313t, and may be a structure having a spiral blade. In the present embodiment, the plurality of tooth bars 313 and the plurality of plate members 314 provided over the tooth bars 313 form a cylindrical shape as a whole by separating the internal space of the handling cylinder 31 and the external space of the handling cylinder 31. Although it constitutes a rotating body, a cylindrical rotating body may be provided with a plurality of handling teeth 313t.

The receiving net 32 is mainly composed of a net body 321. In the present embodiment, the net body 321 is provided so as to cover the lower part of the rotating body composed of the plurality of tooth bars 313. The net body 321 is a structure in which wires are stretched in parallel at predetermined intervals. The reticular formation 321 supports the culm rubbed by the tooth bar 313. Further, the net body 321 drops the threshing device 4 from the gap. The left end portion and the right end portion of the net body 321 are detachably supported with respect to the machine frame 300.

[Sorting device]
As described above, the sorting device 4 includes a swing sorting body 41 and a wall insert 42. As shown in FIG. 4, the swing sorter 41 has a feed pan 411, a chaff sheave 412, and a straw rack 413, which are connected to each other. In the present embodiment, the chaff sheave 412 is arranged behind the feed pan 411, and the straw rack 413 is arranged behind the chaff sheave 412. Below the swing sorter 41, an eccentric cam type swing drive mechanism 410 that swings the swing sorter 41 back and forth in conjunction with the rotation of the swing shaft 41a extending in the left-right direction is provided. .. Rotational power is transmitted to the swing shaft 41a, which is the drive shaft of the swing sorter 41, by a transmission structure described later.

The feed pan 411 is a wide and flatly formed structure. The feed pan 411 receives the threshing that has fallen from the receiving net 32. Further, the feed pan 411 swings back and forth to move the threshing on the feed pan 411 backward while leveling the threshing. At this time, the threshing is spread evenly in the left-right direction by the slanted fins 411f.

The chaff sheave 412 is a structure in which a plurality of sheave plates 412p are attached in parallel at predetermined intervals. The angle of the sheave plate 412p is configured to be changeable. The chaff sheave 412 sifts the threshing sent from the feed pan 411 by rocking back and forth. As a result, the contaminants mixed in the threshing can be raised and separated from the grains. In this way, the chaf sheave 412 performs grain sorting (“fine sorting”) from threshing. After finely sorted threshing (“first processed product” containing only grains), after passing through a sieving net 415, it is guided by a first-class grain plate 431 and falls to the first gutter 43, and then the first conveyor 143. Will be transported to the right side. The first conveyor 143 conveys grains with the rotation of the first screw shaft 143a extending in the left-right direction. Rotational power is transmitted to the first screw shaft 143a, which is the drive shaft of the first conveyor 143, by a transmission structure described later. The threshing that remains on the chaff sheave 412 moves backwards and is sent to the straw rack 413.

The straw rack 413 is a structure in which a plurality of rack plates 413p are mounted in parallel at predetermined intervals. The straw rack 413 swings back and forth to sift the threshing sent from the chaff sheave 412. This allows the relatively large contaminants mixed in the threshing to be supported and separated from the grains. In this way, the straw rack 413 sorts grains from threshing (“fine sorting”). The threshed product after fine sorting (“second processed product” containing grains and a small number of small impurities) is guided by the second-class grain plate 441 and falls to the second gutter 44. The threshing that has fallen on the second gutter 44 is conveyed to the right side by the second conveyor 144, reduced and conveyed to the front end side of the sorting device 4, and is used for the sorting process again. The second conveyor 144 conveys grains as the second screw shaft 144a extending in the left-right direction rotates. Rotational power is transmitted to the second screw shaft 144a, which is the drive shaft of the second conveyor 144, by a transmission structure described later. The threshing remaining on the straw rack 413 moves backward and is discharged to the outside.

The wall insert 42 is arranged below the front portion of the rocking sorter 41, and supplies sorting wind toward the rocking sorter 41. The wall insert 42 includes a fan portion 421 and a case portion 422. In the present embodiment, the fan portion 421 is arranged below the feed pan 411, and the case portion 422 is arranged so as to cover the fan portion 421. The fan portion 421 is pivotally supported by a wall insert shaft 42a extending in the left-right direction. The fan portion 421 rotates about the wall insert shaft 42a. The rotational power from the engine 61 is transmitted to the wall insert shaft 42a, which is the drive shaft of the wall insert 42, by a transmission structure described later.

The fan portion 421 is a structure in which a plurality of fan plates 421p are attached at a predetermined angle. The fan section 421 sends wind toward the chaff sheave 412 and the straw rack 413 to blow away impurities. That is, the fan portion 421 rotates and sends out the wind to blow off the straw debris on the chaf sheave 412 and the straw rack 413, and the straw debris that has fallen from them. This makes it possible to separate relatively small impurities mixed in threshing. In this way, the fan unit 421 sorts grains from threshing. The threshed grains (including only grains) after sorting are guided by the first-class grain plate 431 and fall to the first gutter 43. Alternatively, the threshing after sorting (including grains and a small number of small impurities) is guided by the second stream grain plate 441 and falls to the second gutter 44.

The case portion 422 is a structure formed by bending a plate material. The case portion 422 covers the fan portion 421 and guides the wind sent out by the fan portion 421 in a predetermined direction. More specifically, the case portion 422 guides the wind sent out by the fan portion 421 in a predetermined direction.

The sorting device 4 further includes a second wall insert 423. The second wall insert 423 includes a second fan portion 424 and a second case portion 425. The second fan portion 424 rotates about the second wall insert shaft 423a.

[Shredding device]
Behind the sorting device 4, a threshing device 3 and a shredding device 7 for shredding the culms such as straw scraps carried out from the sorting device 4 and discharging them to the outside are provided. The shredding device 7 includes a chopper 71 that shreds the culm at the lower rear portion of the handling chamber 30, a free rotary blade 72 provided below the chopper 71, and a chopper hood 73 that covers the chopper 71 and the free rotary blade 72. The chopper hood 73 has an outlet cover 74 provided behind the chopper hood 73.

The chopper 71 includes a chopper shaft 711 (corresponding to a drive shaft) extending in the left-right direction, and a plurality of cutting blades 712 extending radially from the chopper shaft 711. The plurality of cutting blades 712 are arranged spirally at predetermined intervals in the axial direction of the chopper shaft 711. More specifically, the plurality of cutting blades 712 are arranged at predetermined intervals in the left-right direction which is the longitudinal direction of the chopper shaft 711 and the circumferential direction along the rotation direction of the chopper 71. The chopper 71 rotates about the chopper shaft 711. Rotational power is transmitted to the chopper shaft 711, which is the drive shaft of the chopper 71, by a transmission structure described later. The rotation direction of the chopper 71 is counterclockwise when viewed from the left side.

The free rotary blade 72 includes a free rotary shaft 721 extending in the left-right direction and a plurality of disc blades 722. The free rotation shaft 721 is arranged so as to be parallel to the chopper shaft 711. Further, the free rotation shaft 721 is located behind the chopper shaft 711 as shown in FIG. The free rotation shaft 721 is rotatably supported on the left and right side walls of the chopper hood 73 by a pair of left and right bearings 723.

The free rotation shaft 721 is composed of a first rotation shaft 7211 and a second rotation shaft 7212. The first rotating shaft 7211 has a hexagonal cross-sectional shape. Further, the first rotating shaft 7211 has a hollow portion 7211a having a hexagonal cross section formed inside. That is, the first rotating shaft 7211 has a hexagonal tubular shape. The second rotating shaft 7212 has a shaft portion 7212a having a hexagonal cross section that fits into the hollow portion 7211a of the first rotating shaft 7211. The second rotating shaft 7212 is rotatably supported by the chopper hood 73 via the bearing 723. The bearing 723 is attached to the chopper hood 73 by the bracket 723a. The cross-sectional shape of the first rotating shaft 7211 is not limited to a hexagon, and may be a polygon such as a triangle or a quadrangle.

The plurality of disk blades 722 are arranged at predetermined intervals in the axial direction of the free rotation shaft 721. A cylindrical collar 724 inserted through the first rotating shaft 7211 is provided between the adjacent disc blades 722. The collar 724 has a function of positioning the disc blade 722 and supporting the disc blade 722 from the side. The collar 724 may have a hexagonal tubular shape.

The disk blade 722 is formed with a hexagonal insertion hole 722a to be inserted into the first rotation shaft 7211. The insertion hole 722a of the disk blade 722 and the cross section of the first rotating shaft 7211 have a hexagonal shape that fits each other. As a result, the disc blade 722 does not freely rotate with respect to the free rotation shaft 721, so that the rotational force of the disc blade 722 generated by the contact of the culm is appropriately transmitted to the free rotation shaft 721. As a result, since all the disc blades 722 rotate at the same time, it is possible to prevent the occurrence of a state in which some of the disc blades 722 do not rotate (do not exert the feed action), and the feed action of the culm is enhanced. ..

The cutting blade 712 of the chopper 71 and the disc blade 722 of the free rotary blade 72 (in other words, the lower end portion of the rotation locus 712f (see FIG. 4) of each cutting blade 712 and the upper end portion of the disc blade 722 each time) are left and right. Arranged alternately in the direction, each cutting blade 712 passes while rotating between adjacent disc blades 722. As a result, the culm is cut between the alternately arranged cutting blades 712 and the disc blades 722. At this time, the disk blade 722 rotates clockwise when viewed from the left side. By arranging the plurality of cutting blades 712 in a spiral shape, it is possible to enhance the feeding action of the culm as compared with the conventional disc blade, and the cutting processing capacity is increased.

Further, as shown in FIG. 4, the front end of the rotation locus 712f of the cutting blade 712 is located in front of the front end 722f of the disc blade 722. As a result, the culm carried out from the handling chamber 30 comes into contact with the cutting blade 712 before the disc blade 722, so that the culm is transported without staying in the chopper hood 73. Further, the diameter of the rotating cutting blade 712 is larger than the diameter of the disc blade 722, and the feeding action of the culm can be improved.

The chopper hood 73 is formed with an outlet 731 that opens toward the rear, and the shredded culms are discharged through the culm 731.

The chopper hood 73 rotatably supports both ends of the chopper shaft 711 and the free rotation shaft 721. Further, the chopper hood 73 supports a plate-shaped frame 732 arranged above the free rotation shaft 721. By providing the frame 732 above the free rotation shaft 721, it is possible to prevent the culm from being wrapped around the free rotation shaft 721. The frame 732 is located below the lowermost end of the rotation locus 712f of the rotating cutting blade 712.

The frame 732 is a plate-shaped member extending in the left-right direction, and the front portion of the frame 732 is inclined upward. A plurality of long slits 732a are formed in the frame 732 in the front-rear direction. The width of the slit 732a in the left-right direction is slightly larger than the thickness of the disc blade 722, and a part of the disc blade 722 projects upward from the slit 732a. As a result, the disc blade 722 is supported from the side by the frame 732, so that the disc blade 722 can be prevented from tilting in the left-right direction. Further, by providing the frame 732, the culm is guided by the frame 732 and is appropriately conveyed to the cutting processing position between the cutting blade 712 and the disc blade 722, and the culm after cutting is also appropriately conveyed to the rear. Ru.

The outlet cover 74 includes a top plate 741 inclined downward toward the rear, a pair of left and right side plates 742, and a plurality of guide plates 743 arranged between the pair of side plates 742. The top plate 741 and the pair of side plates 742 are provided so as to cover the outer peripheral edge portion of the culm opening 731, and the lower portion and the rear portion of the culm opening cover 74 are open. The guide plate 743 is provided in a posture inclined to the right toward the rear. As a result, the culm discharged from the culm opening 731 is guided downward and diagonally backward to the right.

[Power transmission mechanism]
As shown in FIG. 8, the combine 100 of the present embodiment includes a handling cylinder input shaft 315 interlocked with and connected to the handling cylinder shaft 311 in front of the handling cylinder 31. The belt transmission mechanism 81 is provided on the right side of the threshing device 3 and the sorting device 4 over the handling cylinder input shaft 315 and the first counter shaft 45. That is, the transmission belt 81b is bridged over the handling cylinder input shaft 315 and the first counter shaft 45. The rotational power from the engine 61 is transmitted from the output shaft 61a of the engine 61 to the right end of the first counter shaft 45 via the belt transmission mechanism 83, and is transmitted to the right end of the handling cylinder input shaft 315 by the belt transmission mechanism 81. To. The belt transmission mechanism 83 is provided with a threshing clutch 83c that tensions or relaxes the transmission belt 83b to connect or disconnect power.

The handling cylinder input shaft 315 extends along the left-right direction, and its left end portion is interlocked with the front end portion of the handling cylinder shaft 311. The handling cylinder input shaft 315 is interlocked with the handling cylinder shaft 311 via a bevel gear mechanism 317 covered with a gear case 317c (not shown in FIG. 4). The front end portion of the handling cylinder shaft 311 and the left end portion of the handling cylinder input shaft 315 are rotatably supported by the gear case 317c, respectively. The rotational power transmitted to the handling cylinder input shaft 315 is transmitted to the handling cylinder shaft 311 via the bevel gear mechanism 317, so that the handling cylinder 31 rotates.

As described above, in the present embodiment, the left end portion of the handling cylinder input shaft 315 is interlocked and connected to the front end portion of the handling cylinder shaft 311. However, the present invention is not limited to this, and the right end portion of the handling cylinder input shaft 315 may be interlocked and connected to the front end portion of the handling cylinder shaft 311. In any case, the rotational power from the engine 61 is transmitted to the first counter shaft 45, and the rotational power taken out from the first counter shaft 45 is transmitted to the handling cylinder input shaft 315.

The wall insert 42 rotates about the wall insert shaft 42a. The wall insert shaft 42a is formed of a hollow pipe shaft, and is fitted so as to be rotatable relative to the first counter shaft 45. The power transmitted to the first counter shaft 45 is transmitted to the left end of the second counter shaft 46 arranged in front of the first counter shaft 45 via the belt transmission mechanism 88. Then, the power transmitted to the left end portion of the second counter shaft 46 is transmitted to the wall insert shaft 42a via the belt transmission mechanism 89, so that the wall insert 42 rotates. The second counter shaft 46 is rotatably supported by a support shaft 47 supported by the machine frame 300.

The belt transmission mechanism 82 is provided over the first counter shaft 45 and the chopper shaft 711 of the chopper 71. That is, the transmission belt 82b is bridged over the first counter shaft 45 and the chopper shaft 711. The power transmitted to the left end portion of the first counter shaft 45 is transmitted to the chopper shaft 711 via the transmission belt 82b.

In the present embodiment, the rotational power taken out from the first counter shaft 45 is transmitted to the swing shaft 41a, the first screw shaft 143a, and the second screw shaft 144a. More specifically, the rotational power transmitted to the first counter shaft 45 is transmitted to the first screw shaft 143a and the second screw shaft 144a via the belt transmission mechanism 84, and is transmitted to the second screw shaft 144a. The rotational power is transmitted to the swing shaft 41a via the belt transmission mechanism 85. The transmission belt 84b of the belt transmission mechanism 84 is bridged over the first counter shaft 45, the first screw shaft 143a, the second wall insert shaft 423a, and the second screw shaft 144a. The transmission belt 85b of the belt transmission mechanism 85 is bridged over the second screw shaft 144a and the swing shaft 41a.

By the way, as described above, the second processed material falls to the second gutter 44, is guided by the second conveyor 144, is conveyed to the right side (right side wall member 305 of the threshing device 3), and is conveyed to the right side wall member 305. After passing through the formed opening 305a (see FIG. 4), it is transported forward and upward to the front end side of the sorting device 4. At that time, if the amount of the second processed material conveyed by the second conveyor 144 is large, the second processed material that has passed through the opening 305a of the right wall member 305 of the threshing device 3 cannot be completely conveyed upward, and the opening It flows back through the 305a and further flows into the second wall insert 423 arranged in front of the second wall insert 44, which may cause a blockage in the second wall insert 423.

Therefore, in the present embodiment, with reference to FIG. 9A, the upper part of the opening 305a formed in the right wall member 305 of the threshing device 3 and the upper part of the rotation locus of the second conveyor 144 in the left side view. The spacing (radial distance of the second conveyor 144) is designed to be equal from the front to the rear, reducing the amount of second-processed material that flows back through the opening 305a. is doing. In addition, in the upper part of the opening 305a, an inflow prevention unit that prevents the second processed material from flowing into the second wall insert 423 when the second processed material flows back into the second gutter 44 through the opening 305a. 305b is provided.

As shown in FIG. 9A, the inflow prevention portion 305b is formed in the shape of an umbrella that bends (curves) along the shape of the opening 305a in a side view. Further, as shown in FIG. 9B, the inflow prevention portion 305b is provided so as to be inclined so as to approach the second conveyor 144 as the distance from the opening 305a increases, and the second conveyor 144 flows backward from the opening 305a. The inflow prevention effect on the second wall insert 423 is improved by colliding with the inflow prevention unit 305b before the second processed material bounced up by the conveyor belt diffuses.

In the present embodiment, an example of a conventional combine is shown, but the present invention is not limited to this, and the present invention may be a head-feeding combine.

The present invention is not limited to the above-described embodiment, and various improvements and changes can be made without departing from the spirit of the present invention.

100 combine 3 threshing device 6 power device 7 shredding device (culm disposal device)
71 Chopper 711 Chopper shaft (drive shaft)
712 Cutting blade 72 Free rotary blade 721 Free rotary shaft 7211 1st rotary shaft 7212 2nd rotary shaft 722 Disc blade 722a Insertion hole 73 Chopper hood 732 Frame 732a Slit

Claims (4)

Equipped with a culm processing device that processes culm at the lower rear part of the threshing device
The waste disposal device has a plurality of cutting blades arranged spirally at intervals in the axial direction of the drive shaft to which rotational power from the drive source is transmitted, and free rotation arranged in parallel with the drive shaft. A combine having a plurality of disc blades arranged at intervals in the axial direction of the free rotation axis, and cutting the exhaust between the cutting blades and the disc blades arranged alternately. .. Further provided with a plate-shaped frame arranged below the cutting blade and above the free rotation axis.
The combine according to claim 1, wherein a part of the disk blade protrudes from a slit provided in the frame. The combine according to claim 1 or 2, wherein the front end of the rotation locus of the cutting blade is located in front of the front end of the disk blade. The combine according to any one of claims 1 to 3, wherein the free rotation axis has a polygonal cross-sectional shape, and the disk blade has a polygonal insertion hole to be inserted through the free rotation axis. ..

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