JP7055169B2 - Threshing structure of a combine harvester - Google Patents

Description

The present invention is equipped with a spiral blade at the front end of the handling cylinder, which scrapes and conveys the harvested grain culm supplied and conveyed toward the front end toward the rear as the handling cylinder rotates. Regarding the threshing structure of the culm-type combine.

As a threshing structure for a full-culm-filled combine, two scraping screws (spiral blades) for scraping the object to be processed are attached to the front tapered peripheral surface formed on the front end side of the handling cylinder body, and the handling cylinder body is used. Two screws connected to the rear end of each scraping screw are attached to the cylindrical peripheral surface of the culm, and each screw has a large number of teeth to be handled and a plurality of partial spirals having a length larger than that of each tooth in the circumferential direction. There are those in which the spiral feed vanes are detachably bolted to each other in a state where they are alternately located and protrude outward from the screw. As a result, the object to be processed is threshed by the action of the teeth to be processed with the drive rotation of the main body of the handling cylinder, and the object to be processed is conveyed backward by the action of a screw or the like (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 07-107844 (paragraph numbers 0013 to 0014, FIGS. 1 to 2)

In the whole culm harvester type combine, the entire harvested grain harvester is supplied and transported toward the front end of the handling cylinder as an object to be processed. The amount of processing is larger than that of a head-feeding combine that is supplied and transported toward. In addition, when the entire harvested culm is supplied and transported as an object to be processed toward the front end of the handling cylinder, only the tip side of the harvested culm is supplied and transported toward the front end of the handling cylinder. Therefore, there is a high possibility that foreign matter such as mud is supplied and transported toward the front end of the handling cylinder as an object to be processed together with the cut grain culm.

Therefore, in the all-culm harvester type combine, there is an inconvenience that the part that acts on the object to be processed with the rotation of the handling cylinder wears due to contact with the object to be processed, as compared with the self-removing type combine. It is easy to occur.

In particular, the spiral blades (scraping screws) installed at the front end of the handling cylinder supply and convey all the objects to be processed to the front end of the handling cylinder as the machine travels, as the handling cylinder rotates. Therefore, it is scraped and transported toward the rear threshing treatment area, and since it comes into violent contact with a large amount of objects to be treated during harvesting work, it may be significantly worn in long-term use.

When such wear occurs, it is formed between the spiral blade and the transport assist guide provided below the spiral blade to assist the scraping and transport of the cut grain culm by the spiral blade. The gap becomes large, and it becomes difficult for the spiral blades to scrape and transport the cut grain culm received by the transport assist guide.

In other words, in a combine harvester with a full culm, if the spiral blades are significantly worn due to long-term use, the scraping and transporting action of the spiral blades on the harvested culm will be reduced, and as a result, the threshing processing capacity will be reduced. Will be invited.

As a method of avoiding such a decrease in threshing processing capacity, it is conceivable to replace a spiral blade or the like worn by long-term use. , A large number of handling teeth and multiple partial spiral feed vanes are detachably attached to each screw attached to the cylindrical peripheral surface of the handling cylinder body, and the front narrowing circumference formed on the front end side of the handling cylinder body. Since the spiral blades are not detachably attached to the surface, if the spiral blades are significantly worn due to long-term use, it will be necessary to take large-scale measures such as replacing the entire handling cylinder body together with the spiral blades. It will be.

In other words, in a combine harvester based on the conventional technology, it takes a considerable amount of labor and cost to take appropriate measures against the wear of the spiral blades, etc., so the threshing processing capacity caused by the wear of the spiral blades, etc. It was difficult to avoid the decline.

An object of the present invention is to make it possible to easily and inexpensively perform appropriate measures for wear of a spiral blade or the like, and to easily avoid a decrease in threshing processing capacity due to wear of the spiral blade or the like.

The feature of the present invention is
A full-culm input type combine equipped with a spiral blade at the front end of the handling cylinder to scrape and convey the harvested grain culm supplied and transported toward the front end toward the rear as the handling cylinder rotates. It is a threshing structure of
By arranging below the handling cylinder so as to cover the front end portion of the handling cylinder from below, the cut grain culm supplied and conveyed toward the front end portion of the handling cylinder is received and cut by the spiral blade. A transport assistance guide is provided to assist the scraping transport of grain culms.
A support frame extending in the front-rear direction on the left and right sides of the handling cylinder is provided.
The support frame is supported by a top plate that covers the handling cylinder from above.
A first connecting portion to be connected to the support frame is formed at the upper end of the transport assist guide.
The first connecting portion is connected by the first connecting tool from above in a state of being placed on the upper surface of the support frame.
A portion of the top plate located above the first connecting tool is characterized in that an entry portion into which the first connecting tool enters is formed .
Further, in the present invention
It is preferable that a bent portion that bends upward is formed at the left and right outer ends of the first connecting portion.
Further, in the present invention
A receiving net that covers the lower side of the handling cylinder from below is provided.
A second connecting portion connected to the support frame is formed at the upper end portion of the receiving net.
The second connecting portion is connected by a second connecting tool from above in a state of being placed on the upper surface of the support frame.
It is preferable that an entry portion into which the second connecting tool enters is formed in a portion of the top plate located above the second connecting tool.
Further, in the present invention
It is preferable that a bent portion that bends upward is formed at the left and right outer ends of the second connecting portion.
Further, in the present invention
It is preferable that the support frame is provided above the rotation axis of the handling cylinder.
Further, in the present invention
The inner surface of the top plate is provided with a plurality of dust transmission valves.
At the left and right ends of the top plate, it is preferable to provide a removable plate member between the inner surface of the top plate and the dust feed valve.
Further, in the present invention
It is preferable that the portion of the transport assist guide below the guide surface and not the guide surface is connected to the front wall of the threshing device.
Further, in the present invention
It is preferable that the portion that is not the guide surface is connected to the front wall by a connecting tool that faces from the front to the front and back.
Further, in the present invention
In front view, the guide surface of the transport assist guide is configured so that the upper portion is wider than the lower portion.
In a plan view, it is preferable that the guide surface of the transport assisting guide has a wider rear portion than the front portion.

Overall side view of the combine harvester Overall plan view of the combine harvester Longitudinal side view of threshing device Partial vertical front view showing the configuration of the front end of the threshing device Partial vertical front view showing the configuration of the front and rear middle parts of the threshing device Top view of the main part showing the configuration of the handling cylinder and the transport assist guide. Cross-sectional plan view of the main part showing the configuration of the handling cylinder Cross-sectional view of the main part showing the mounting structure of the spiral blade Longitudinal rear view of the handling cylinder showing the configuration of the handling cylinder Cross-sectional plan view of the main part showing another configuration of the handling cylinder Longitudinal front view of the main part showing the configuration of the seam member Cross-sectional plan view of the main part showing the length and arrangement of the dust valve Top view of the main part showing the configuration of the transport assist guide Longitudinal side view of the main part showing the configuration of the transport assist guide Perspective view of the main part showing the configuration of the receiving net Perspective view of the main part showing the structure of the chaff sheave

FIG. 1 shows the whole aspect of a harvester-type combine harvester that targets rice, wheat, and the like. FIG. 2 shows the entire plane. As shown in these figures, in the all-culm-loaded combine, an engine 2 and a transmission (not shown) are mounted on the right front part of the fuselage frame 1 made of a square pipe steel material or the like. A pair of left and right crawler type traveling devices 3 driven by power from the engine 2 transmitted via a transmission or the like are deployed in the lower part of the machine frame 1. A cutting and transporting device 4 that cuts and transports the planted culms to be harvested toward the rear is connected to the front portion of the machine frame 1 so as to be able to move up and down. The left half of the machine frame 1 is equipped with a threshing device 5 that performs threshing treatment on the harvested grain culms from the cutting and transporting device 4 and sorting treatment on the processed material obtained by the threshing treatment. ing. A bagging device 6 that stores grains from the threshing device 5 and enables bagging of the stored grains is mounted on the right half of the machine frame 1. A boarding operation unit 7 is formed on the right front portion of the fuselage frame 1.

In the left and right crawler type traveling devices 3, the steering system (not shown) operates based on the left-right swing operation of the cross-swing type and neutral return type control lever 8 provided in the boarding operation unit 7. By doing so, the straight-ahead state in which they are driven at a constant speed and the turning state in which they are differentially driven are switched and appear.

At both left and right ends of the front end of the cutting and transporting device 4, a divider 9 is deployed to comb the planted culms into the planted culms to be harvested and the planted culms not to be harvested as the aircraft travels. Has been done. Above the front part of the cutting and transporting device 4, a rotary reel 10 is provided which scrapes the tip side of the planted culm to be harvested, which is combed by the left and right dividers 9, toward the rear. At the bottom of the cutting and transporting device 4, a cutting mechanism 11 for cutting the stock root side of the planted culm to be harvested is provided. Behind the cutting mechanism 11, an auger 12 is deployed that gathers the planted culms (cutting culms) after cutting by the cutting mechanism 11 at predetermined locations in the left-right direction and sends them backward from the predetermined locations. There is. The predetermined portion of the auger 12 is equipped with a feeder 13 including a conveyor for supplying and transporting the harvested culm sent out from the predetermined portion to the threshing device 5.

The cutting and transporting device 4 swings up and down with the connection point between the machine frame 1 and the feeder 13 as a fulcrum by operating a hydraulic elevating cylinder (not shown) erected over the machine frame 1 and the feeder 13. The operation of the elevating cylinder is controlled by switching the operating state of the control valve (not shown) that controls the flow of hydraulic oil to the elevating cylinder based on the swing operation of the control lever 8 in the front-rear direction. That is, by swinging the control lever 8 in the front-rear direction, the cutting and transporting device 4 can be raised and lowered, and the cutting height can be adjusted to change the height position of the cutting mechanism 11 with respect to the planted culm. It is configured in.

As shown in FIGS. 3 to 5, a handling chamber 14 is formed in the upper part of the threshing device 5. In the handling chamber 14, a handling cylinder 16 that rotates about a support shaft 15 in the front-rear direction erected along the transport direction of the cut grain culm as a fulcrum is provided. Below the handling cylinder 16, a receiving net 17 formed in a front view U-shape that covers the lower side of the handling cylinder 16 from below is provided. In the threshing device 5, a culm 18 for discharging the culm after the threshing process to the outside of the machine is formed behind the receiving net 17, which is the lower end in the direction of the threshing process. Below the receiving net 17, a swing sorting mechanism 19 that performs a sieving sorting process on the processed material leaked from the receiving net 17 is provided. In the front lower part of the swing sorting mechanism 19, sorting wind is supplied to the processed material leaking from the receiving net 17 and the processed material being sieved and sorted, and the processed material is subjected to the wind power sorting process. The wall insert 20 is deployed. Behind the wall insert 20, a first recovery unit 21 for collecting the processed material leaked from the front side of the swing sorting mechanism 19 is formed. Behind the No. 1 recovery unit 21, a No. 2 collection unit 22 for collecting the processed material leaked from the rear side of the swing sorting mechanism 19 is formed. Behind the swing sorting mechanism 19, a discharge port 23 is formed for discharging the processed material conveyed from the swing sorting mechanism 19 to the rear end of the swing sorting mechanism 19 to the outside of the machine. ing. Above the handling cylinder 16, a top plate 24 that covers the upper side of the handling cylinder 16 from above is provided so as to be openable and closable.

The handling chamber 14 is partitioned by a receiving net 17 covering the handling cylinder 16, a top plate 24, and the like. At the lower portion of the front end of the handling chamber 14, a supply port 25 is formed in which the entire cut grain culm conveyed by the feeder 13 is supplied as a processed product.

The handling cylinder 16 has a support shaft 15 rotatably erected over the front wall 26 and the rear wall 27 of the threshing device 5. Then, the handling cylinder 16 is rotationally driven clockwise with the support shaft 15 as a fulcrum by the power transmitted from the engine 2 via the wall insert 20 and the like, and is supplied to the handling chamber 14 by this rotational drive. The cut grain fulcrum is subjected to threshing treatment, and while promoting the single graining of the grain, the cut grain fulcrum is transported toward the rear of the machine body, which is on the lower side in the direction of threshing treatment.

The receiving net 17 is a concave receiving net formed in a grid pattern, and receives the cut grain culms supplied to the handling chamber 14 to assist the threshing process of the handling cylinder 16 for the cut grain culms. Specifically, the receiving net 17 receives the harvested culm that is threshed by the rotational operation of the handling cylinder 16, and is obtained by the threshing treatment of single-grained grains, grains with branch stems, or grains with branch stems. The processed material such as culms generated in the threshing process is leaked toward the lower rocking sorting mechanism 19, while the leakage to the rocking sorting mechanism 19 such as the threshing culm is prevented.

The swing sorting mechanism 19 includes a plan-view frame-shaped sheave case 29 that is swing-driven in the front-rear direction by a cam-type drive mechanism 28. On the upper part of the sheave case 29, a grain pan 30, a chaff sheave 31, and a straw rack 32 for rough sorting are arranged in this order from the front side of the sheave case 29. At the lower part of the sheave case 29, a grain pan 33 for fine sorting and a grain sheave 34 are arranged in this order from the front side of the sheave case 29. In the upper part of the rocking sorting mechanism 19, the sorting processed material leaked from the receiving net 17 in a state where single grain grains and culms are mixed is received by the upper Glenpan 30, the chaff sheave 31 or the straw rack 32. , Perform a rough sorting process by sieving. In the lower part of the rocking sorting mechanism 19, the sorting processed product leaked from the chaff sheave 31 in a state where single grain grains and grains with branch stems are mixed is received by the lower Glenpan 33 and Glenshive 34 and sieved. Performs precise sorting by sorting. As a result, the sorted product is divided into a single grain as the first product, a mixture of grains with branch stems and culm as the second product, and dust such as culm as the third product. Sort to.

The wall insert 20 is powered by the engine 2 transmitted via the belt-type transmission mechanism 35, and is rotationally driven around the support shaft 20A as a fulcrum to generate a sorting wind. The sorting wind is supplied to the sorting processed product leaked from the receiving net 17 or the sorting processed product sorted by the swing sorting mechanism 19 through the three air passages R1 to R3, thereby sorting. Culm debris having a small specific density is blown from the processed material and transported toward the discharge port 23 on the lower side in the threshing processing direction.

The first collection unit 21 collects the single-grained grains leaked from the grain receive 34 of the swing sorting mechanism 19 as the first product in a state where dust such as straw dust is removed by the sorting wind from the wall insert 20. .. At the bottom of the first recovery unit 21, the first screw 36 driven by the power from the engine 2 transmitted via the wall insert 20 and the like is arranged in the left-right direction. The No. 1 screw 36 conveys the No. 1 item collected by the No. 1 collection unit 21 toward the lifting screw 37 (see FIG. 2) serially provided at the right end thereof.

The second collecting unit 22 is a mixture of grains with stalks and culms that flowed down from the rear end of the grain sheave 34 without leaking from the grain sheave 34 of the rocking sorting mechanism 19, and the rocking sorting mechanism 19. A mixture of grains with branch stems and culm waste leaked from the straw rack 32 is collected as the second product. At the bottom of the second recovery unit 22, the second screw 38 driven by the power from the engine 2 transmitted via the wall insert 20 and the like is arranged in the left-right direction. The No. 2 screw 38 conveys the No. 2 object collected by the No. 2 collection unit 22 toward the No. 2 reduction mechanism 39 (see FIG. 2) serially provided at the right end thereof.

The lifting screw 37 lifts the first item conveyed by the first screw 36 and supplies it to the grain tank 40 provided in the upper part of the bagging device 6 (see FIGS. 1 and 2). The No. 2 reduction mechanism 39 is provided with a reprocessing unit (not shown) for threshing the No. 2 product conveyed by the No. 2 screw 38 again, and the No. 2 product after the threshing treatment by the reprocessing unit is provided. It is lifted and reduced to the rocking sorting mechanism 19 (see FIG. 2).

The discharge port 23 collects threshed culms that flow down from the outlet 18 without leaking from the receiving net 17, and culms sorted and transported to the rear of the swing sorting mechanism 19 by a sieve sorting process or a wind force sorting process. Release to the outside of the aircraft.

As shown in FIGS. 3 to 9, the handling cylinder 16 includes a truncated cone-shaped scraping portion 41 forming a front end portion thereof and a handling processing portion 42 connected to the rear end of the scraping portion 41. Has been done. On the outer peripheral surface of the scraping portion 41, two pieces of harvested grain culms supplied and conveyed to the supply port 25 by the feeder 13 are scraped and conveyed toward the rear handling portion 42 as the handling cylinder 16 rotates. The spiral blade 43 is equipped.

The handling processing unit 42 includes a first plate 44 integrally equipped on the front portion of the support shaft 15, a second plate 45 integrally equipped on the front-rear intermediate portion of the support shaft 15, and a third plate integrally equipped on the rear end portion of the support shaft 15. Six handles made of round pipe steel or the like supported by the plates 46 and their plates 44 to 46 so as to be arranged at regular intervals in the circumferential direction of the handling cylinder 16 in a front-back posture along the support shaft 15. A plurality of handling teeth 48 equipped on the body frame 47 and each handling body frame 47 so as to be arranged at a predetermined interval in the front-rear direction in a posture of projecting from the handling body frame 47 toward the outside of the handling body 16. , And so on.

That is, on the handling cylinder 16, a plurality of handling teeth 48 protruding outward are arranged and arranged so as to be arranged at a predetermined interval in the circumferential direction and the front-rear direction of the handling processing portion 42. Further, the handling cylinder 16 is formed so that the internal space S of the handling processing unit 42 communicates with the handling chamber 14 and allows the processed material to enter the internal space S. As a result, when the handling cylinder 16 is rotated, the processing material around the processing material and the processed material that has entered the internal space S are agitated, and the processing material is hit by the handling cylinder frame 47 and the handling teeth 48. Threshing is performed by combing.

Moreover, since the internal space S of the handling processing unit 42 communicates with the handling chamber 14, even when a large amount of threshed culms are supplied to the handling chamber 14 as a processed material, the internal space S of the handling processing unit 42 Can be effectively used as a processing space for threshing processing. As a result, it is possible to avoid the retention of the processed material in the processing space and the saturation of the processing space. As a result, the processed material leaks from the concave 3 without sufficient threshing treatment due to the retention of the processed material and the saturation of the processing space, or the load required for the threshing treatment increases and the handling cylinder 16 is subjected to. It is possible to avoid the occurrence of inconveniences such as damage to the transmission system.

When the handling cylinder 16 is rotated, not only the plurality of handling teeth 48 but also the six handling cylinder frames 47 forming the handling processing portion 42 of the handling cylinder 16 are used as handling processing members acting on the processed object. Since it functions, it is possible to improve the threshing performance and the threshing efficiency.

Further, in the front and rear intermediate portions of the handling cylinder 16 where the amount of processed material is reduced due to the threshing treatment on the front side of the handling cylinder 16 causing many grains to become single grains and leaking from the receiving net 17, the handling cylinder 16 is used. The second plate 45 that separates the internal space S in the front-rear direction prevents the processed material from flowing to the lower side in the threshing processing direction in the internal space S of the handling cylinder 16, and handles the processed material as the handling cylinder 16 rotates. It is guided to the surroundings to promote threshing by hitting or combing the handling tooth 48 or the like against the processed material, and leakage of single grain grains from the receiving net 17. As a result, the single-grained grains and ungrained culms contained in the processed product pass through the internal space S of the handling cylinder 16 and are formed at the lower end of the threshing treatment direction together with the deciduous culms. It is possible to prevent the occurrence of the third loss due to the discharge from 18.

Further, when the handling cylinder 16 is rotated, the outside air sucked from the supply port 25 as the spiral blade 43 rotates together with the cut grain culm that is scraped and conveyed by the action of the scraping portion 41 is around the handling cylinder 16. It will flow smoothly into the internal space S of the culm processing unit 42. As a result, it is possible to prevent the culm waste generated by the threshing process from flowing out from the supply port 25 to the feeder 13, and it is possible to more quickly transport the processed material to the lower side in the threshing process direction.

Further, the outside air sucked from the supply port 25 passes through the inside of the feeder 13 connected to the supply port 25, and the feeder 13 is equipped with a cutting mechanism 11, an auger 12, and the like. Since the carry-out port (not shown) for carrying out the collected culm formed in the cutting and collecting section of No. 4 communicates with the supply port 25, suction is performed by the rotation of the spiral blade 43 when the handling cylinder 16 is rotated. Due to the action, dust such as culms generated in the cutting process and the collecting process in the cutting and collecting section is also collected from the carry-out port of the cutting and collecting section through the internal space of the feeder 13 and the supply port 25, together with the outside air. It will flow into the surroundings and the internal space S of the culm processing unit 42. As a result, it is possible to suppress the adhesion and accumulation of culms and the like in the cutting and collecting section, and the poor transportation of the culm due to the adhesion and accumulation, and the deterioration of the work environment and visibility due to the soaring. Can be suppressed.

Each of the plates 44 to 46 has a circular shape centered on the support shaft 15, and the handling cylinder frame 47 is bolted to the outer peripheral side of the plates 44 to 46 at equidistant positions from the support shaft 15. That is, six handling cylinder frames 47 are arranged on the outer peripheral side of each plate 44 to 46 so as to be arranged at regular intervals in the circumferential direction so that the cylinder diameter of the handling cylinder 16 becomes large. This makes it possible to prevent the cut grain culm from wrapping around the handling cylinder 16.

Each handling cylinder frame 47 can be oriented and changed between a normal posture in which the front-rear direction thereof coincides with the front-rear direction of the handling cylinder 16 and an inverted posture in which the front-rear direction thereof is opposite to the front-rear direction of the handling cylinder 16. It is bolted to each of the plates 44 to 46 so that the front and rear directions of the adjacent handling cylinder frames 47 are reversed.

A plurality of mounting holes 47A and 47B that enable mounting of the handling teeth 48 are arranged in each handling body frame 47 at a constant pitch P in the front-rear direction thereof, and the handling body frame 47 is mounted from the front end to the front. The distance L1 to the center of the hole 47A and the distance L2 from the rear end of the barrel frame 47 to the center of the last mounting hole 47A are different by half a pitch (= 1 / 2P). ..

Each of the handling cylinder frames 47 is connected and supported by the plates 44 to 46 in a state in which the front-rear orientations of the adjacent cylinder frames 47 are opposite to each other. As a result, while adopting the same configuration as the six handling cylinder frames 47, the handling teeth 48 equipped on each of the handling cylinder frames 47 are arranged in the front-rear direction with the handling teeth 48 of the adjacent handling cylinder frames 47. It can be positioned in a state where it is displaced by half a pitch. As a result, the striking interval of the handling teeth 48 with respect to the processed object can be reduced without reducing the spacing between the adjacent handling teeth 48.

That is, the entanglement of the grain culm in the processed material with respect to the handling teeth 48, which is more likely to be invited as the distance between the adjacent handling teeth 48 is reduced while reducing the cost by making each handling body frame 47 have the same configuration. It is possible to improve the threshing performance by increasing the number of hits of the handling teeth 48 against the processed material while effectively preventing the clogging of the processed material due to the above.

Further, by equipping each handling body frame 47 so that the orientation can be changed between the normal posture and the inverted posture, the handling teeth 48 located on the upper side in the grain removal processing direction, which are relatively easily worn due to the large amount of processed material, are worn. By changing the orientation of each handling body frame 47, the plurality of handling teeth 48 provided in each handling body frame 47 are relatively good in the direction of grain removal processing, which is relatively easy to wear. The position can be changed at once so that the handling tooth 48 on the side and the handling tooth 48 on the lower side in the grain removal processing direction, which are hard to wear, are replaced. As a result, the tooth handling 48 on the lower side in the threshing treatment direction with less wear can be effectively used as the handling tooth 48 on the upper side in the threshing treatment direction with a large amount of processed material.

Of the plurality of mounting holes 47A and 47B, four (two front and rear) mounting holes 47A located at both front and rear ends of each handling body frame 47 are formed to have a smaller diameter than the mounting holes 47B located in the middle portion. ing.

Of each of the handling teeth 48, the handling tooth 48A to be mounted using the small diameter mounting hole 47A is composed of a stepped round bar steel material having a small diameter portion 48a inserted into the mounting hole 47A, and the center thereof is composed of a stepped round bar steel material. It is detachably nut-fastened to the handling cylinder frame 47 so as to be located on a line passing through the center of the support shaft 15 and the center of the handling cylinder frame 47.

The handling tooth 48B mounted by using the mounting hole 47B in the intermediate portion is made of a stepless round bar steel material, and its center is located on a line passing through the center of the support shaft 15 and the center of the handling body frame 47. As described above, it is welded to the handling cylinder frame 47 so as not to be removable.

That is, since each of the handling teeth 48A located at the front and rear ends of the handling processing portion 42 is removable, when the handling teeth 48A are significantly worn by long-term use including changing the orientation of the handling cylinder frame 47. Can be easily replaced with a new tooth 48A.

Further, on the lower side in the threshing processing direction in which the amount of threshed culms increases, as shown in FIG. 10, if the handling teeth 48A located at the rear end of the handling cylinder 16 are deployed in a thinned state, the rear end of the handling cylinder 16 is provided. The interval between the handling teeth 48A in the portion becomes large, and the retention of the threshing culm due to the catching on the handling teeth 48A at the rear end portion of the handling cylinder can be effectively suppressed. As a result, the release of the threshed culm from the culm 18 can be promoted.

As shown in FIGS. 3 to 5, 11 and 12, the top plate 24 has a curved portion 24A that curves substantially along the rotation locus K of the tip of the tooth, and semicircles located at both front and rear ends of the curved portion 24A. The vertical wall portion 24B and the linear side edge portions 24C located on the left and right sides of the curved portion 24A are integrally equipped. The top plate 24 has a closed position that covers the upper side of the handling cylinder 16 from above and an open position that opens the upper side of the handling cylinder 16 with a plurality of hinges 24D provided on the left side edge portion 24C as fulcrums. It is configured to enable opening / closing swing operation over a period of time. The right side edge portion 24C is provided with a plurality of bolts 24E for fixing the top plate 24 in the closed state.

The curved portion 24A is formed to be curved so as to smoothly guide the processed material conveyed toward the upper portion of the handling cylinder 16 toward the lower receiving net 17 by the inner surface thereof due to the rotational operation of the handling cylinder 16. There is. On the inner surface of the curved portion 24A, a plurality of dust feeding valves 49 that guide the processed material conveyed to the upper part of the handling chamber 14 toward the lower side in the threshing processing direction as the handling cylinder 16 rotates, are front and rear. It is detachably and fixedly equipped in a state where it is lined up at a predetermined interval in the direction. Of the plurality of dust transmission valves 49, the frontmost dust transmission valve 49A is formed in an arc shape extending from the front vertical wall portion 24B to the left side edge portion 24C, and the other dust transmission valves 49B are left and right side edge portions. It is formed in an arc shape over 24C.

That is, since the top plate 24 is provided with the curved portion 24A, the processed material that is scraped up and conveyed to the upper part of the handling chamber 14 by a plurality of handling teeth 48 or the like as the handling cylinder 16 rotates is transferred to the inner surface of the curved portion 24A. It can be smoothly guided toward the receiving net 17 on the lower side in the threshing processing direction while following the dust feeding valve 49. Further, since each dust feed valve 49 is formed in a long arc shape extending over the left side edge portion 24C or the left and right side edge portions 24C, it is conveyed to the upper part of the handling chamber 14 as the handling cylinder 16 rotates. It is possible to effectively improve the guiding action of each dust feed valve 49A on the processed material. As a result, each of the treated teeth 48 is not in a shape having a transporting action on the processed material, but in a shape dedicated to threshing that can be suitably hit and combed on the processed material, but the processed material is placed on the lower side in the threshing processing direction. As a result, it is possible to improve the threshing performance and the transport performance for the processed material.

A steel plate seam member 50 bent and formed so as to have a guide surface 50a connecting the inner surface of the curved portion 24A and the inner surface of the receiving net 17 in a series is detachably bolted to the left and right side edge portions 24C. There is. In this way, the seam member 50, which is located at the seam between the receiving net 17 and the top plate 24 and thus has a strong contact with the processed material, is detachably configured so that the seam member 50 comes into contact with the processed material. Only the seam member 50 can be easily replaced if it is significantly worn. That is, for example, as in the case where the seam member 50 is welded to the top plate 24 in a detachable manner, the entire top plate 24 is replaced together with the worn seam member 50 without causing trouble and economic disadvantage. It is possible to appropriately take measures against the wear of the seam member 50.

Incidentally, a small clearance is set between the tip of each handling tooth 48 and the lower edge of each dust feed valve 49 in order to improve the guidance of the processed object by the dust feed valve 49. Further, between the tip of each handling tooth 48 and the inner surface of the receiving net 17, the tip of each handling tooth 48 and each dust feeding valve are used to promote leakage of single grain grains from the receiving net 17. A clearance larger than the clearance set between the lower edge and the 49 is set.

As shown in FIGS. 3, 4, 6 to 8 and 10, in the handling cylinder 16, two support plates 41A are spirally welded to the outer peripheral surface of the scraping portion 41. Then, on the back surface of each of the support plates 41A, the corresponding spiral blades 43 are detachably bolted to each other with the corresponding spiral blades 43 protruding outward from the outer edge of the corresponding support plate 41A. There is.

That is, in the handling cylinder 16, the harvested grain culm supplied and conveyed to the supply port 25 by the feeder 13 is scraped and conveyed rearward as the cylinder 16 rotates, so that the harvested grain culm is violently contacted with the harvested grain culm. Two spiral blades 43, which are prone to wear due to contact, are detachably attached to the suction portion 41 of the handling cylinder 16, so that when each spiral blade 43 is significantly worn due to long-term use. Only the spiral blade 43 can be easily replaced. As a result, for example, when the spiral blade 43 is welded to the scraping portion 41 in a detachable manner, the spiral blade 43 is replaced with the scraped portion 41 together with the worn spiral blade 43 without causing trouble and economic disadvantage. It is possible to appropriately take measures against the wear of the blade 43.

Each support plate 41A is reinforced by a plurality of reinforcing ribs 41B welded so as to extend over the front surface thereof and the outer peripheral surface of the scraping portion 41.

As shown in FIGS. 3, 4, 6, 13, and 14, in the threshing device 5, the cutting that is supplied and conveyed to the supply port 25 by the feeder 13 between the front wall 26 and the receiving net 17 in the threshing device 5. A transport assist guide 51 that receives the grain culm and assists in the scraping and transport of the cut grain culm by the two spiral blades 43 is provided. The transport assist guide 51 is composed of a pair of left and right guide members 51A and 51B that are bolted in a substantially U-shape in front view to cover the lower side of the suction portion 41 from below. The left and right guide members 51A and 51B are detachably bolted to the front wall 26 of the threshing device 5 and the pair of left and right support frames 52 arranged in the front-rear direction on the upper part of the threshing device 5. A second plate 51b made of stainless steel forming a guide surface extending from the front wall 26 of the threshing device 5 to the receiving net 17 is welded to the 51a.

That is, in this grain removing device 5, by assisting the scraping and transporting of the harvested culm by the two spiral blades 43, the transport assist guide is in violent contact with the harvested culm and is likely to cause wear due to the contact. The 51 is detachably equipped and can be divided into left and right guide members 51A located on the upper side in the rotation direction of the handling cylinder 16 and right guide members 51B located on the lower side in the rotation direction of the handling cylinder 16. The structure is divided into two parts, left and right, so that only the transport assist guide 51 can be easily replaced when the entire transport assist guide 51 is significantly worn due to long-term use. Further, when either the left or right guide member 51A or 51B in the transport assist guide 51 is significantly worn due to long-term use, only the significantly worn guide member 51A or 51B can be easily replaced. As a result, for example, when the transport assist guide 51 is welded to the receiving net 17 or the left and right support frames 52 in a detachable manner, the receiving net 17 or the left and right support frames 52 are replaced together with the transport assist guide 51, or Even if one of the left and right sides of the transport assist guide 51 is significantly worn, as in the case where the transport assist guide 51 is configured to be indivisible, there is a troublesome and economical disadvantage such as replacing the entire transport assist guide 51. It is possible to appropriately take measures against the wear of the transport assist guide 51 without inviting it.

Moreover, since the transport assist guide 51 is made of stainless steel, which is resistant to corrosion and has high strength, it is possible to reduce the frequency of replacement due to wear.

As shown in FIGS. 3, 5, 6 and 15, the receiving net 17 is composed of four receiving net members 53 formed in the same shape, and is detachably bolted to the left and right support frames 52. There is. Each receiving net member 53 is provided with a base frame 53A framed in a rectangular shape. Within the frame of the base frame 53A, a plurality of vertical bars 53B made of strip-shaped steel plates are arranged and arranged in the front-rear direction at regular intervals in the circumferential direction of the handling cylinder 16. Further, a plurality of first cross rails 53C made of strip-shaped steel plates curved in an arc shape are arranged and arranged in the left-right direction with a predetermined interval in the front-rear direction which is the support axis direction of the handling cylinder 16. Further, a plurality of second cross rails 53D made of piano wire rods curved in an arc shape are arranged and arranged in the left-right direction at regular intervals in the front-rear direction between the adjacent first cross rails 53C. .. Then, the mesh formed in the frame of the base frame 53A has a horizontally long rectangular shape in which the length in the circumferential direction of the handling cylinder 16 is longer than the length in the direction along the front-rear direction. The arrangement intervals of 53B to 53D are set.

That is, it is considered that during the threshing process in which the handling cylinder 16 is rotationally driven, the single-grained grains obtained by the threshing processing for the harvested grain culm flow in the rotation direction as the handling cylinder 16 rotates. Then, the receiving net 17 is configured so that the mesh has a horizontally long rectangular shape that is long in the rotation direction of the handling cylinder 16. As a result, as compared with the case where the mesh of the receiving net 17 is configured to have a vertically long rectangular shape that is long in the threshing processing direction (front-back direction) of the handling cylinder 16, single grain grains and the like are formed in the receiving net 17. It becomes easy to leak from the front side of. As a result, it is possible to effectively suppress the generation of deflated grains due to the suppression of leakage of single grain grains from the front side of the receiving net 17. Further, by forming each receiving net member 53 into the same shape, the productivity and assembling property of the receiving net 17 can be improved.

As shown in FIGS. 3 and 16, the chaf sheave 31 for rough sorting is composed of a single sorting plate 54 bolted to the sheave case 29 in a rearward tilting posture located upward toward the lower side in the sorting direction. Has been done.

On the front side of the sorting plate 54 (a region of about 1/3 of the front side with respect to the entire sorting plate 54), a plurality of leak holes 54A formed in a rectangular shape in a plan view are formed between the leak holes 54A in the front row. The leak holes 54A in the back row are arranged in a staggered manner. On the rear side of the sorting plate 54 (a region of about two-thirds of the rear side with respect to the entire sorting plate 54), a plurality of leak holes 54B, 54C formed in a rectangular shape in a plan view having the sorting pieces 54a, 54b are formed. , The leak holes 54B and 54C in the rear row are arranged in a staggered manner between the leak holes 54B and 54C in the front row.

Of the sorting pieces 54a and 54b, the sorting pieces 54a located on the left and right center sides of the sorting plate 54 are narrower toward the lower side in the sorting direction and are formed in a scale shape located above. The sorting pieces 54b located at the left and right ends of the sorting plate 54 have a rectangular shape shorter than the sorting pieces 54a on the left and right center sides, and are embossed so as to be located above the lower side in the sorting direction.

That is, since the chaf sheave 31 for rough sorting is composed of a single sorting plate 54, for example, the chaf sheave 31 is configured by arranging and arranging a large number of chaf flips made of strip steel plates at regular intervals in the front-rear direction. It is possible to simplify the configuration and reduce the cost as compared with the case of doing so.

Then, by forming a leak hole 54A not provided with the sorting pieces 54a and 54b on the front side of the chaf sheave 31 to which the sorted product having a high content of single grain grains is supplied, the front portion of the chaf sheave 31 is formed. The number of single-grained grains leaking from the side to the lower Glenpan 33 and Glenshive 34 increases. As a result, it is possible to increase the recovery rate of the single grain grains in the first recovery section 21 located below the Glenpan 33 and the Glenshive 34.

Further, by forming the leak holes 54B and 54C provided with the sorting pieces 54a and 54b on the rear side of the chaff sheave 31 in a staggered manner in front, back, left and right, the sorting processed product on the chaff sheave 31 is formed in the sieve sorting process. It will be evenly distributed in the left-right direction without any deviation. As a result, leakage of the single grain grains from the leakage holes 54B and 54C can be promoted.

Further, by equipping the chaf sheave 31 in a rearward tilting posture, the chaff sheave 31 sets the sorted material on the upper side in the sorting processing direction in the sieve sorting process, as compared with the case where the chaf sheave 31 is equipped in the horizontal posture. The force to push toward it increases. Therefore, during the sieving sorting process, the transport of the sorted processed product to the lower side in the sorting direction is suppressed, and the vertical movement of the sorted processed product becomes violent, so that the specific gravity difference sorting of the sorted processed product is more effective. Therefore, the leakage of the grains having a large specific density from the leakage holes 54B and 54C is promoted, and the single grain grains are discharged to the outside of the machine from the discharge port 23. Can be effectively suppressed, and as a result, the grain recovery efficiency can be improved.

In addition, by forming the sorting pieces 54b on the left and right ends of the chaf sheave 31 to be shorter than the sorting pieces 54a on the left and right center side, the sorting processed material in the chaf sheave 31 is easily deposited from the leak holes 54C on the left and right ends. Leakage of grains and the like can be promoted. As a result, it is possible to avoid a decrease in sorting efficiency due to the accumulation of the sorting processed material at the left and right ends of the chaff sheave 31.

Incidentally, the ratio of the leak hole 54A formed in the chaff sheave 31 without the sorting pieces 54a and 54b to the leaking holes 54B and 54C having the sorting pieces 54a and 54b depends on the type of grain to be sorted and the like. Various changes can be made accordingly.

Further, on the front side of the sorting plate 54, a plurality of leak holes 54C formed in a rectangular shape in a plan view so as to have a short and rectangular sorting piece 54b are provided between the leak holes 54C in the front row in the rear row. The leak holes 54C may be arranged and formed in a staggered pattern.

As shown in FIG. 3, among the sorting winds from the wall insert 20, the sorting wind passing through the upper air passage R1 passes through the air passage R4 formed in the sheave case 29 and is directed toward the second plate 45 of the handling cylinder 16. It is set to flow. As a result, the processed material whose flow to the lower side in the threshing processing direction is blocked by the second plate 45 can be conveyed by wind power toward the periphery of the handling cylinder 16. As a result, it is possible to avoid the possibility that the processed material is deposited at the position immediately before the second plate 45 and interferes with the threshing process.

As shown in FIGS. 3 and 6, in the handling cylinder 16, the handling teeth 48A located at the rear end thereof are located rearward of the rear end of the receiving net 17 and face the culm opening 18. That is, at the rear end of the handling cylinder 16, the receiving net 17 does not exist, so that a relatively large space is formed around the receiving net 17. As a result, even if the threshing grain culm is entangled with the handling tooth 48A at the rear end of the handling cylinder, the shedding grain culm will come out from the tip of the handling tooth 48A by the centrifugal force accompanying the rotation of the handling cylinder 16. .. As a result, it is possible to effectively suppress the retention of the threshed culm due to being caught on the tooth 48A at the rear end of the handling cylinder 16, and to promote the release of the threshed culm from the outlet 18. can.

[Another Embodiment]

[1] As the handling drum 16, the handling processing portion 42 is provided on the outer periphery of the barrel portion so as to be connected to the cylindrically formed body portion and the two spiral blades 43 provided in the scraping portion 41. It may be configured in a drum type by a single screw and a large number of handle teeth that are detachably equipped at predetermined intervals in a state of protruding outward from the outer peripheral portion of each screw. ..

[2] The handling cylinder 16 may have a single spiral blade 43 detachably attached to the outer peripheral surface of the front end portion 41, and three or more pieces may be attached to the outer peripheral surface of the front end portion 41. The spiral blade 43 may be detachably attached.

[3] The handling cylinder 16 may have a plurality of support fittings to which the spiral blades 43 are detachably attached are arranged and arranged in a spiral shape on the outer peripheral surface of the front end portion 41 thereof.

[4] The spiral blade 43 may be configured by spirally arranging and arranging a plurality of blade-shaped members on the outer peripheral surface of the front end portion 41 of the handling cylinder.

[5] The transport assist guide 51 may be configured so that it cannot be divided into left and right, or it may be configured so that it can be divided into three or more.

[6] The transport assist guide 51 may be configured so that only the portion 51B located on the lower side in the rotation direction of the handling cylinder 16 can be attached and detached.

[7] As the material of the transport auxiliary guide 51, a steel material such as carbon steel other than stainless steel may be adopted.

[8] The seam member 50 may be detachably attached to the receiving net 17.

15 Rotating shaft of the handling cylinder 16 Handling cylinder 17 Receiving net 24 Top plate
26 Front wall of threshing device
41 Front end of the handling body
43 Spiral blade
49 Dust valve
50 plate member
51 Transport assistance guide
52 support frame

Claims (9)

A full-culm input type combine equipped with a spiral blade at the front end of the handling cylinder to scrape and convey the harvested grain culm supplied and transported toward the front end toward the rear as the handling cylinder rotates. It is a threshing structure of
By arranging below the handling cylinder so as to cover the front end portion of the handling cylinder from below, the cut grain culm supplied and conveyed toward the front end portion of the handling cylinder is received and cut by the spiral blade. A transport assistance guide is provided to assist the scraping transport of grain culms.
A support frame extending in the front-rear direction on the left and right sides of the handling cylinder is provided.
The support frame is supported by a top plate that covers the handling cylinder from above.
A first connecting portion to be connected to the support frame is formed at the upper end of the transport assist guide.
The first connecting portion is connected by the first connecting tool from above in a state of being placed on the upper surface of the support frame.
A threshing structure of a full-culm-filled combine in which an entry portion into which the first connector enters is formed in a portion of the top plate located above the first connector. The threshing structure of a full-culm-filled combine according to claim 1, wherein a bent portion that bends upward is formed at the left and right outer ends of the first connecting portion. A receiving net that covers the lower side of the handling cylinder from below is provided.
A second connecting portion connected to the support frame is formed at the upper end portion of the receiving net.
The second connecting portion is connected by a second connecting tool from above in a state of being placed on the upper surface of the support frame.
The threshing structure of a full-culm-filled combine according to claim 1 or 2, wherein an entry portion into which the second connecting tool enters is formed in a portion of the top plate located above the second connecting tool. The threshing structure of a full-culm-filled combine according to claim 3, wherein a bent portion that bends upward is formed at the left and right outer ends of the second connecting portion. The threshing structure of a full-culm-filled combine according to any one of claims 1 to 4, wherein the support frame is provided above the rotation axis of the handling cylinder. The inner surface of the top plate is provided with a plurality of dust transmission valves.
The all-culm loading type combine according to any one of claims 1 to 5, wherein a removable plate member is provided between the inner surface of the top plate and the dust feed valve at the left and right ends of the top plate. Threshing structure . The threshing of the all-culm input type combine according to any one of claims 1 to 6, wherein the portion of the transport assist guide below the guide surface and not the guide surface is connected to the front wall of the threshing device. Construction. The threshing structure of a full-culm-filled combine according to claim 7, wherein a portion other than the guide surface is connected to the front wall from the front by a connecting tool facing forward and backward. In front view, the guide surface of the transport assist guide is configured so that the upper portion is wider than the lower portion.
The threshing structure of the all-culm-filled combine according to any one of claims 1 to 8, wherein the guide surface of the transport assist guide is wider in the rear portion than in the front portion in a plan view.

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