CN107046953B - Whole stalk feeding type combine harvester - Google Patents

Abstract

The invention provides kinds of whole stalk feeding type combine harvester, even in the case of supplying a large amount of threshing processing objects, the load required by the threshing processing will not increase, and the threshing processing objects can be fully threshed, the processing capacity is excellent, a threshing chamber (14) is provided with a threshing cylinder (16) which rotates by taking a support shaft (15) which is oriented in the front and back direction as a fulcrum, and carries out the threshing processing to the straws supplied from a supply port (25) in the front direction along the rotation, a bearing net (17) which leads the processing objects threshed by the threshing cylinder (2) to leak is arranged below the threshing cylinder, wherein, the threshing cylinder comprises a plurality of rod-shaped components (47) which are arranged in a state of being arranged along the front and back direction of the support shaft and are arranged in a state of being spaced at a prescribed interval in the circumferential direction of the threshing cylinder, and a plurality of threshing teeth (18) which are arranged in a state of being spaced at a prescribed interval in the front and back direction, and are arranged on the rod-shaped components in a state of protruding from the rod-.

Description

Whole stalk feeding type combine harvester

The present application is based on a divisional application of an original application (application date of 3/10.2006, application No. 200610059537.0, entitled "threshing device") and a divisional application (divisional filing date of 6/7.2011, application No. 201110157215.0, entitled "threshing device and whole straw feed type combine harvester equipped with the same").

Technical Field

The present invention relates to threshing devices, each of which has a threshing cylinder that rotates about a forward and rearward facing support shaft as a fulcrum in a threshing chamber and that performs threshing on straw supplied from a forward supply port as it rotates, and a receiving net that allows the material threshed by the threshing cylinder to fall is provided below the threshing cylinder.

Background

As the threshing device described above, there is a threshing device in which a cylindrical straight section is formed with spiral threshing teeth on the outer periphery thereof to form a threshing cylinder (see, for example, japanese patent application laid-open No. h 11-266666).

In the above configuration, most of the threshing chamber is used as an arrangement space for the threshing cylinder, and only the remaining narrow space around the threshing cylinder can be used as a processing space for threshing processing. Therefore, in a high-speed operation or the like in which a large amount of straw is supplied as a threshed object, the processing space may be saturated. When such saturation occurs, the threshed objects tend to remain in the processing space, which may cause problems such as direct leakage of the threshed objects from the receiving net in a state where sufficient threshing processing is not performed, or damage to a transmission system or the like that transmits the threshed objects to the threshing cylinder due to an increase in load required for the threshing processing.

Disclosure of Invention

The purpose of the present invention is to provide kinds of threshing devices which can perform sufficient threshing processing on threshing processed objects without increasing the load required for threshing processing even when a large amount of threshing processed objects are supplied, and which have excellent processing capability.

An th feature of the present invention is a threshing device comprising a threshing cylinder mounted in a threshing chamber and rotatable about a support shaft extending in the longitudinal direction and adapted to perform threshing of straw fed from a forward feed port in response to the rotation of the threshing cylinder, wherein the threshing cylinder is provided below the threshing cylinder with a receiving net for allowing the threshing material threshed by the threshing cylinder to fall, wherein the threshing cylinder comprises a plurality of rod-like members arranged in a predetermined spaced manner in the circumferential direction of the threshing cylinder in a posture extending in the longitudinal direction of the support shaft, and a plurality of threshing teeth arranged in a predetermined spaced manner in the longitudinal direction and protruding from the rod-like members toward the outside of the threshing cylinder.

According to this configuration, the threshing cylinder has a space communicating with the threshing chamber inside thereof, and allows the threshed objects to enter the inside space thereof, and when the threshing cylinder is rotated, agitates the threshed objects around the threshing cylinder and the threshed objects entering the inside space, and performs threshing processing on the threshed objects by hitting the plurality of rod-shaped members and the threshing teeth.

That is, even when a large amount of straw is supplied to the threshing chamber as the threshing object, the internal space of the threshing cylinder can be effectively used as the processing space for the threshing processing. Therefore, it is possible to prevent the retention of the threshed processed object in the processing space and the saturation of the processing space, and to prevent the problem that the threshed processed object leaks from the receiving net without sufficient threshing processing due to the retention of the threshed processed object or the saturation of the processing space, and the problem that the transmission system for the transmission of the threshing cylinder is damaged due to the increase of the load required for the threshing processing. In addition, not only the plurality of threshing teeth but also the plurality of rod-like members forming the cylinder body portion of the threshing cylinder function as threshing processing members acting on the threshed objects during the rotation operation of the threshing cylinder.

Further, since the plurality of rod-shaped members are arranged in the circumferential direction of the threshing cylinder at predetermined intervals, the long stalks can be prevented from being wound around the rod-shaped members, and the retention of the threshing processed material due to the winding can be avoided.

Therefore, even when a large amount of the threshing processed object is supplied, the threshing processing can be sufficiently performed on the threshing processed object without increasing the load required for the threshing processing. Thus, damage to a threshing cylinder transmission system and the like due to an increase in load can be avoided, and the threshing performance and threshing efficiency can be improved. As a result, a threshing cylinder structure of a threshing device excellent in durability and treatment ability can be provided.

A second characteristic configuration of the present invention is that a raking portion having a shape that becomes thinner toward the tip end is provided at the front end portion of the threshing cylinder, and the raking portion includes spiral teeth that rake and convey the straw supplied from the supply port rearward as the straw rotates about the support shaft.

According to this configuration, when the threshing cylinder is rotated, the outside air sucked from the supply port as the spiral teeth are rotated flows smoothly into the surrounding and internal space of the threshing cylinder together with the straw raked and conveyed by the raking part, whereby straw chips and the like generated by threshing can be prevented from flowing out from the supply port, and the threshed objects can be conveyed more quickly to the downstream side in the threshing process direction, that is, to the rear side.

Therefore, it is possible to avoid poor straw supply due to straw chips and the like flowing out from the supply port, and to promote the transportation of the threshing processed object in the threshing chamber and the discharge of dust such as straw chips and the like generated in the threshing process from the rear portion (end portion in the threshing process direction) of the machine body, and as a result, it is possible to improve the threshing performance and the threshing efficiency by steps.

In a third characteristic configuration of the present invention, the rod-like member is provided so as to be capable of changing its orientation to an inverted posture in which the front and rear are reversed.

Among the threshing teeth provided in the threshing cylinder, the threshing teeth located on the upstream side in the threshing processing direction where the amount of threshing processed material is large are more likely to be worn than the threshing teeth located on the downstream side in the threshing processing direction where the amount of threshing processed material is small.

Therefore, when the rod-like member is mounted in the reversed posture in which the direction is changed to be reversed, and the threshing teeth located on the upstream side in the threshing process direction are worn significantly, the positions of the plurality of threshing teeth mounted on the rod-like member can be changed to in which the threshing teeth on the upstream side in the threshing process direction, which are worn significantly, and the threshing teeth on the downstream side in the threshing process direction, which are worn less significantly, are interchanged.

Therefore, by a simple operation of changing the orientation of the rod-shaped member, the threshing teeth on the downstream side in the threshing processing direction, which are less worn, can be used as the threshing teeth on the upstream side in the threshing processing direction, which have a large amount of threshing processing, and as a result, a good processing capacity on the upstream side in the threshing processing direction can be ensured for a long period of time, and the operation for the above purpose is easy to perform, and the maintainability is excellent.

In a fourth characteristic configuration of the present invention, the threshing teeth provided on the rear side of the threshing cylinder are formed such that the projecting portion thereof has a sweep angle inclined toward the upstream side in the rotation direction.

According to this configuration, the straw is prevented from being caught by the threshing teeth having the sweep angle at the rear side of the threshing cylinder, that is, the downstream side in the threshing processing direction, whereby the retention of the straw after the threshing processing (threshing straw) due to the catching of the straw to the threshing teeth at the rear side can be prevented, and the discharge of the straw after the threshing processing from the terminal end in the threshing processing direction can be promoted.

Therefore, the discharge of the straws after threshing is promoted, and the flow of the threshed objects in the threshing chamber is promoted, so that the threshing efficiency is improved in step .

In a fifth characteristic configuration of the present invention, the threshing teeth provided on the front side of the threshing cylinder are formed to have a conveying portion at a projecting end thereof for pushing and conveying the processed material in the threshing chamber rearward in accordance with the rotation around the support shaft.

According to this configuration, the conveying of the threshed object to the downstream side in the threshing process direction is promoted by the threshing teeth having the conveying portion on the front side of the threshing cylinder, that is, on the upstream side in the threshing process direction.

Further, since the threshing teeth have the conveying portion at the projecting end portion and the striking action portion for the threshing processed object is enlarged, a large amount of the threshing processed object can be effectively struck by the threshing teeth of the striking action portion enlarged on the upstream side in the threshing processing direction where the amount of the threshing processed object is large.

Therefore, threshing performance and threshing efficiency can be improved by improving threshing teeth provided on the front side of the threshing cylinder easily .

A sixth characteristic configuration of the present invention is that the threshing teeth are provided to be replaceable.

According to this configuration, when a certain threshing tooth is extremely worn or deformed, only the threshing tooth can be replaced.

In a configuration in which the threshing teeth having the sweepback angle are provided on the rear side of the threshing cylinder, or the threshing teeth having the conveying section at the projecting end portion are provided on the front side of the threshing cylinder, when the threshing teeth located on the upstream side in the threshing processing direction are worn significantly and the processing capacity on the upstream side in the threshing processing direction is reduced, the orientation of the rod-shaped member is changed, and then the threshing teeth having the sweepback angle and the threshing teeth having the conveying section at the projecting end portion, which are changed to the opposite position to the original position of the threshing cylinder by the change in the orientation, are replaced, so that the original processing capacity can be restored relatively easily.

Therefore, when a threshing tooth is extremely worn or deformed, the replacement of parts can be performed at the minimum, and the economical efficiency is good, and also in a configuration in which a threshing tooth having a sweep angle is provided on the rear side of a threshing cylinder, or a configuration in which a threshing tooth having a conveying portion at a projecting end portion is provided on the front side of a threshing cylinder, and the like, a good processing capability can be ensured for a long period of time, and the work for achieving the purpose is easy to perform, and the maintainability is excellent.

A seventh characteristic configuration of the present invention is that the threshing teeth are provided so as to be adjustable in length.

According to this configuration, even if the threshing teeth are worn, the length of the threshing teeth can be easily returned to the original length, and the original processing capacity before the threshing teeth are worn can be relatively easily returned.

Further, the length of each threshing tooth can be set to an appropriate length corresponding to the arrangement thereof, so that if the length of the threshing teeth arranged on the upstream side in the threshing processing direction where the amount of the threshing processed object is large is increased, a large amount of the threshing processed object can be efficiently hit by the longer threshing teeth, so that the threshing performance can be improved, and if the length of the threshing teeth arranged on the downstream side in the threshing processing direction is shortened, retention of straw (threshing straw) after the threshing processing due to hooking to the threshing teeth can be suppressed, discharge of straw after the threshing processing from the terminal part in the threshing processing direction can be promoted, and flow of the threshing processed object in the threshing chamber can be promoted, so that the threshing efficiency can be improved.

Therefore, even if the threshing teeth are worn, the original processing capacity before wear can be recovered without replacing parts, and an economical device can be obtained, and by setting an appropriate length according to the arrangement of the threshing teeth, threshing performance and threshing efficiency can be improved by steps, and a device with better processing capacity can be obtained.

An eighth characteristic configuration of the present invention is that a plurality of stalk cutters are provided on a fixing member provided outside the threshing cylinder so as to be spaced apart from the rotation locus of the threshing teeth by a predetermined interval, so as to enter between the rotation loci of the corresponding threshing teeth from outside the threshing teeth.

According to this configuration, the harvested straws fed into the threshing device are subjected to threshing processing by the rotating operation of the threshing cylinder, and are conveyed while being pushed against the straw cutter and cut , and are discharged outside the vehicle in a chopped state after the threshing processing.

That is, since the straw can be cut and discharged without providing a cutting device dedicated for cutting processing (even if a cutting device dedicated for cutting processing is provided, only a small-scale cutting device may be provided), it is possible to reduce the cost and simplify the structure, and further reduce the entire load of the combine due to the reduction in weight of the vehicle body, as compared with the case where a dedicated cutting device is provided.

Further, it is possible to prevent the winding of the harvested straws into the threshing cylinder and the entanglement of the long straws, which are generated by subjecting the harvested straws to threshing treatment in a state of long straws, and to avoid the increase of the transport load due to the winding or entanglement and the loss of class 3 caused by the grains entering between the entangled straws and being discharged outside the vehicle from the straws , and it is not necessary to perform straw discharge treatment after harvesting work which is required when the harvested straws are directly discharged outside the vehicle in a state of long straws.

Therefore, the straw discharge device can achieve simplification of the structure, reduction of the cost, and reduction of the load of the whole combine harvester due to the reduction of the weight of the vehicle body, can perform good straw discharge cutting, does not require straw discharge treatment after harvesting, can obtain equipment with good operability, and can achieve improvement of grain recovery efficiency due to reduction of the loss of category 3.

A ninth characteristic configuration of the present invention is a swing sorting mechanism for receiving the processing object leaked from the receiving net and performing a sorting process; the roughing section of the swing sorting mechanism is configured by a sorting plate having a plurality of drain openings formed by punching out a plurality of sorting pieces in an upward scaly shape.

According to this configuration, since the rougher section can be formed by using or more sorting plates, the components of the rougher section can be significantly reduced, and accordingly, simplification of the structure and cost reduction can be achieved, as compared with the case where the rougher section is formed by arranging a plurality of fish scales made of, for example, strip-shaped steel plates at regular intervals in the front-rear direction .

In the sorting process by the operation of the swing sorting mechanism, the sorted articles are brought into contact with the sorting sheets, the conveyance to the downstream side in the conveyance direction is appropriately suppressed, and the sorted articles are appropriately sorted in the left-right direction and the up-down direction.

Therefore, the configuration of the roughing section of the swing sorting mechanism can be simplified and the cost can be reduced, and the sorting accuracy can be improved.

Drawings

Fig. 1 is an overall side view of a whole stalk feeding type combine.

Fig. 2 is an overall plan view of the whole stalk feeding type combine.

Fig. 3 is a longitudinal sectional side view of the threshing device.

Fig. 4 is a front view, partly in longitudinal section, of the threshing device.

Fig. 5 is a plan view of essential parts showing the structure of the threshing cylinder and the arrangement of the stalk cutters.

Fig. 6 is a vertical cross-sectional plan view of essential parts showing the structure of the threshing cylinder and the arrangement of the stalk cutters.

Fig. 7 is a main part longitudinal sectional front view showing the structure of the threshing cylinder and the arrangement of the stalk cutter.

Fig. 8 is a main perspective view showing the structure of the concave plate.

Fig. 9 is a perspective view showing the shape of the stalk cutter.

Fig. 10 is a perspective view of a main part showing the structure of a coarse screen for coarse use.

Fig. 11 is a main rear view showing the structure of the sunshade.

Fig. 12 is a main part side view showing the structure of a threshing cylinder according to another embodiment of the present invention.

Fig. 13 is a longitudinal sectional rear view showing another embodiment of the threshing cylinder using an angle member as a rod-like member.

Fig. 14 is a front longitudinal sectional view showing another embodiment threshing cylinder equipped with 8 rod-like members.

Detailed Description

Fig. 1 shows an entire side surface of a whole-straw feeding type combine harvester to be harvested, such as rice or wheat, in which an engine 2 and the like are mounted on a vehicle body frame 1 formed of an angle pipe steel material and a left and right pair crawler type traveling devices 3 driven by power transmitted from the engine 2 through a transmission device and the like outside the drawing are provided, a harvesting and conveying device 4 for harvesting a crop straw as a harvesting object is connected to a front portion of the vehicle body frame 1 so as to be swingable up and down, a threshing device 5 for performing threshing processing on the harvested straw from the harvesting and conveying device 4 and sorting processing on a processed object obtained by the threshing processing is mounted on a left half portion of the vehicle body frame 1, a bagging device 6 for storing grains from the threshing device 5 and bagging the stored grains is mounted on a right half portion of the vehicle body frame 1, and a riding driving portion 7 is formed in a front portion of the bagging device 6 of the vehicle body frame 1.

The left and right crawler travel devices 3 are configured to assume a straight traveling state when they are driven at a constant speed and a steering state when they are driven differentially, in accordance with a swing operation of a joystick 8 provided in the riding portion 7 in the left-right direction.

As shown in fig. 1 and 2, the harvesting and conveying apparatus 4 is configured such that, as the vehicle body travels, the crop dividers 9 provided at both left and right ends of the front portion thereof separate the crop straw to be harvested from the crop straw other than the crop straw, the rotating reel 10 provided above the front portion thereof rakes the crop straw to be harvested separated by the left and right crop dividers 9 rearward, the hair clipper-shaped cutter mechanism 11 provided at the bottom thereof cuts off the root side of the crop straw to be harvested, the auger 12 provided behind the cutter mechanism 11 gathers the crop straw (the harvested straw) cut off by the cutter mechanism 11 to a predetermined position in the left-right direction, and is fed out backward at the predetermined portion, and a feeder 13 constituted by a conveyor between the predetermined portion and the front upper portion of the threshing device 5 conveys the cut straw from the auger 12 toward the threshing device 5; alternatively, a hydraulic lift cylinder (not shown) provided between the body frame 1 and the feeder 13 is extended and contracted by a swinging movement of the control lever 8 in the front-rear direction, and is configured to be lifted and lowered about a connecting point between the threshing device 5 and the feeder 13, and to perform a cutting height adjustment, that is, a height position of the cutting mechanism 11 with respect to the planted straw, by the lifting and lowering movement.

Fig. 3 shows a longitudinal sectional side view of a threshing device mounted on a whole stalk feeding type combine, and fig. 4 shows a partial longitudinal sectional front view thereof, the threshing device including a threshing cylinder 16 disposed in a threshing chamber 14 formed in an upper portion of the threshing device so as to face forward and backward, a concave plate ( example of a receiving net) 17 disposed so as to cover the threshing cylinder 16 from below, a swing sorting mechanism 19 disposed below the concave plate 17, a wind wheel 20 disposed in a front lower portion of the swing sorting mechanism 19, a 1 st recovery unit 21 formed below a front portion side of the swing sorting mechanism 19, a 2 nd recovery unit 22 formed below a rear portion side of the swing sorting mechanism 19, a discharge port 23 formed behind the swing sorting mechanism 19, and the like.

The threshing chamber 14 has a supply port 25 formed at a lower portion of a front end thereof, and a rear end portion of a feeder 13 for feeding and supplying harvested straws harvested and harvested by a harvesting and harvesting portion (not shown) is connected to the supply port, and all of the planted straws harvested by the harvesting portion (not shown) are supplied as a threshed product via the feeder 13.

The threshing cylinder 16 is rotationally driven in a right-handed (right turn り) manner in a front view with a support shaft 15 rotatably mounted between the front and rear side walls 26, 27 as a fulcrum, thereby performing threshing processing on the harvested straws supplied to the threshing chamber 14, separating grains from the harvested straws, singulating the grains , and conveying the harvested straws to the rear side which is the downstream side in the threshing processing direction.

The concave plate 17 receives the cut straw fed into the threshing chamber 14, assists the threshing cylinder 16 in threshing the cut straw, and prevents the long straw from dropping by allowing the threshed single grain or grain with branches or crushed straw generated by the threshing to drop toward the swing sorting mechanism 19.

The swing sorting mechanism 19 is configured by mounting a grain shaking plate 30 for rough sorting, a rough screen 31 for rough sorting, a straw walker 32 for rough sorting, a grain shaking plate 33 for fine sorting, a lower screen 34 for fine sorting, and the like in a screen box 29 which is driven to swing in the front-rear direction by a cam-type driving mechanism 28, and performs a sorting process on a sorted product in which the singulated grains or the grains with branches are mixed which have leaked from the concave plate 17, and sorts the sorted product into the singulated grains as the 1 st type material, the mixed material of the grains with branches and the straw as the 2 nd type material, the straw chippings and the straw chips as the 3 rd type material, and the like.

The wind turbine 20 is driven to rotate about the support shaft 20A thereof to generate sorting air, and performs wind sorting on the sorted objects that have leaked from the concave plate 17, the 1 st object and the 2 nd object sorted by the swing sorting mechanism 19, and the like.

The 1 st recovery part 21 recovers the singulated grains leaked from the lower screen 34 of the swing separation mechanism 19 as the 1 st type objects in a state where the dust such as straw chips is removed by the separation wind from the wind turbine 20, and conveys the recovered 1 st type objects to the unshown carrying screw 37 connected to the right end thereof in a communicating manner by the 1 st screw 36 arranged at the bottom thereof in the left-right direction.

The 2 nd collecting unit 22 collects as the 2 nd type objects the mixture of branched grains and crushed straws flowing down from the rear end of the lower screen 34 without leaking from the lower screen 34 of the swing sorting mechanism 19 and the mixture of branched grains and crushed straws flowing down from the straw walker 32 of the swing sorting mechanism 19 in a state where dust such as straw chips is removed by the sorting wind from the wind turbine 20, and conveys the collected 2 nd type objects to the 2 nd returning screw connected to the right end thereof in a communicating manner by the 2 nd screw 38 arranged in the right-and-left direction at the bottom thereof.

The winnowing screw 37 winnowing the 1 st type of objects conveyed by the 1 st screw 36, and supplying the winnowing type of objects from above into a grain box arranged on the right side of the threshing device. The 2 nd return screw has a reprocessing section for performing threshing processing again on the 2 nd class object conveyed by the 2 nd screw 38, and the 2 nd class object threshed by the reprocessing section is winnowed and returned to the swing sorting mechanism 19.

The discharge port 23 discharges the long straw flowing down from the rear end of the concave 17 and the crushed straw and straw chips separated and conveyed to the rear of the swing separation mechanism 19 by the screening treatment and the wind separation treatment to the outside of the machine.

As shown in fig. 3 to 7, the threshing cylinder 16 includes a truncated cone-shaped rake part 41 ( examples of shapes that become thinner as the end comes closer to the tip) provided at the front end thereof and a threshing processing part 42 connected to the rear end of the rake part 41, and 2 spiral teeth 43 that rake and convey the cut straw supplied from the supply port 25 toward the threshing processing part 42 behind when the threshing cylinder 16 rotates are provided on the outer peripheral surface of the rake part 41 as a unit .

The threshing processing unit 42 includes a 1 st support plate 44, provided at the front part of the support shaft 15, a 2 nd support plate 45, provided at the front-rear center part of the support shaft 15, a 3 rd support plate 46, provided at the rear end part of the support shaft 15, 6 threshing cylinder frames 47, that is, round pipe members ( example of bar-shaped members) 47 supported by these support plates 45 to 46 in a state of being arranged at intervals of intervals ( example at predetermined intervals) along the circumferential direction of the threshing cylinder 16 in a posture of being oriented in the front-rear direction of the support shaft 15, a plurality of threshing teeth 48 provided on each threshing cylinder frame 47 so as to protrude from the threshing cylinder frame 47 to the outside of the threshing cylinder 16 in a state of being arranged at intervals of intervals ( example at predetermined intervals) in the front-rear direction, and the like.

According to this configuration, the threshing cylinder 16 has a space S communicating with the threshing chamber 14 inside the threshing processing unit 42, and allows the threshing processed objects to enter the inside space S, so that agitates the threshing processed objects around the threshing processing unit and the threshing processed objects entering the inside space S during the rotation operation, and performs threshing processing on the threshing processed objects, the threshing processing being performed by beating or the like by the threshing cylinder frame 47 and the threshing teeth 48.

That is, even when a large amount of harvested straws is supplied to the threshing chamber 14 as the threshing processed object, the internal space S of the threshing cylinder 16 can be effectively used as the processing space for the threshing process, so that the retention of the threshing processed object in the processing space or the saturation of the processing space can be avoided, and the problem that the threshing processed object leaks from the concave 17 without sufficient threshing processing due to the retention of the threshing processed object or the saturation of the processing space, and the problem that the load required for the threshing processing increases and the transmission system for transmission to the threshing cylinder 16 is damaged can be prevented.

In addition, when the threshing cylinder 16 is rotated, not only the plurality of threshing teeth 48 but also the 6 threshing cylinder frames 47 that form the threshing processing section 42, which is the cylinder body portion of the threshing cylinder 16, function as threshing processing means that acts on the threshing processed object, so that the threshing performance and the threshing efficiency can be improved.

Further, during the rotation operation of the threshing cylinder 16, the outside air sucked from the supply port 25 along with the rotation of the helical teeth 43 together with the cut straw raked and conveyed by the raking part 41 smoothly flows into the surrounding and internal space S of the threshing cylinder 16, whereby straw chips and the like generated by the threshing process can be prevented from flowing out from the supply port 25 to the feeder 13, and the threshing processed object can be more quickly conveyed to the downstream side in the threshing process direction, that is, to the rear side.

Further, since 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 communicates with the supply port 25 and an output port (not shown) formed at the recovery end portion of the cutting and recovering portion, dust such as straw chips generated in the cutting and recovering process performed by the cutting and recovering portion also flows into the periphery of the threshing cylinder 16 and the internal space S from the output port of the cutting and recovering portion through the internal space of the feeder 13 and the supply port 25 by the suction action generated by the rotation of the helical teeth 43 and the outside air at the time of the rotation operation of the threshing cylinder 16, as a result, the adhesion and the scattering of straw chips and the like at the cutting and recovering portion can be suppressed, and the poor conveyance of the cutting straw due to the adhesion and scattering and the deterioration of the working environment and the visual field due to the scattering and the like can be suppressed.

Each of the support plates 44 to 46 is circular about the support shaft 15, and 6 connecting portions 44A to 46A capable of supporting and connecting the threshing cylinder frame 47 are formed at positions on the outer peripheral side thereof which are equidistant from the support shaft 15 and are arranged at intervals of in the circumferential direction.

That is, 6 threshing cylinder frames 47 are provided on the outer peripheral side of each support plate 44 to 46 in a state of being arranged at regular intervals of along the circumferential direction thereof, so that the cylinder diameter of the threshing cylinder 16 is made large, whereby the winding of the cut straw into the threshing cylinder 16 can be prevented.

Each threshing cylinder frame 47 is formed in an linear shape, and is provided with a 1 st connecting plate 80 integrally at a front end thereof, a 2 nd connecting plate 81 integrally at a front-rear middle portion thereof, and a 3 rd connecting plate 82 integrally at a rear end thereof, and the 1 st connecting plate 80 and the 3 rd connecting plate 82 are formed so as to be capable of being bolted to the connecting portion 44A of the 1 st support plate 44 and the connecting portion 46A of the 3 rd support plate 46, and the 2 nd connecting plate 81 is formed so as to be capable of being bolted from both front and rear sides to the connecting portion 45A of the 2 nd support plate 45, and by bolting the 1 st connecting plate 80 to the connecting portion 44A of the 1 st support plate 44, the 2 nd connecting plate 81 is bolted to the connecting portion 45A of the 2 nd support plate 45 from the rear, and the 3 rd connecting plate 82 is bolted to the connecting portion 46A of the 3 rd support plate 46, it is possible to be provided in a normal posture in which the front-rear direction is equal to the front-rear direction of the threshing cylinder 16, and by bolting the 1 st connecting plate 80 to the 3 rd connecting plate 46A, it is possible to be provided in a posture opposite to the front-rear direction of the threshing cylinder 16, and to the connecting portion 44A of the threshing cylinder 45.

That is, each threshing cylinder frame 47 is equipped so as to be capable of changing its orientation to a normal posture in which the front-rear direction thereof coincides with the front-rear direction of the threshing cylinder 16, and a reversed posture in which the front-rear direction thereof is opposite to the front-rear direction of the threshing cylinder 16.

Each threshing cylinder frame 47 is provided with a plurality of mounting holes 47A for mounting threshing teeth arranged at a pitch P of in the front-rear direction thereof, and the distance L1 from the front end of the threshing cylinder frame 47 to the center of the foremost mounting hole 47A and the distance L2 from the rear end of the threshing cylinder frame 47 to the center of the rearmost mounting hole 47A are separated by half a pitch.

The 6 threshing cylinder frames 47 are connected and supported by the connecting plates 80 to 82 in a state in which the front-rear directions of the adjacent threshing cylinder frames are opposite to each other, so that the same members are used as the 6 threshing cylinder frames 47, and the threshing teeth 48 of the threshing cylinder 16 are shifted by half a pitch in the front-rear direction from the threshing teeth 48 provided on the adjacent threshing cylinder frames 47.

That is, each threshing tooth 48 is provided in a spiral shape with a position shifted by half pitch and half pitch over the entire threshing cylinder 16, and thereby, in the rotation operation of the threshing cylinder 16, not only the threshing process is performed on the cut straw, but also a conveying function of sending out the cut straw to the downstream side in the threshing process direction, that is, to the rear side is exhibited.

Further, by arranging the threshing cylinder frames 47 so that the orientation thereof can be changed to the normal orientation and the reversed orientation, when the wear of the threshing teeth 48 positioned on the upstream side in the threshing process direction, which is easily worn due to a large amount of threshing processing, is significant, the orientation of each threshing cylinder frame 47 can be changed such that the positions of the threshing teeth 48 provided on each threshing cylinder frame 47 are changed to a state in which the threshing teeth 48 on the upstream side in the threshing process direction, which are easily worn, and the threshing teeth 48 on the downstream side in the threshing process direction, which are hardly worn, are interchanged, whereby the threshing teeth 48 on the downstream side in the threshing process direction, which are less worn, can be effectively used as the threshing teeth 48 on the upstream side in the threshing process direction, which have a large amount of threshing processing.

Each threshing tooth 48 is made of a round bar steel material inserted into a mounting hole 47A of the threshing cylinder frame 47, and among the threshing teeth 48, the threshing teeth 48A provided on the front portion side of the threshing cylinder 16, that is, the front end portion of the threshing processing section 42 are in a stepped form having a small diameter portion inserted into the corresponding mounting hole 47A and a large diameter portion 48b restricting insertion into the mounting hole 47A, and the small diameter portion is formed with a male screw portion 48A for fixing to the threshing cylinder frame 47, and is detachably fixed to a predetermined position of the corresponding threshing cylinder frame 47 by a nut 64.

The threshing teeth 48B provided in the middle of the threshing cylinder 16, i.e., in the middle of the threshing processing section 42, are formed in a line straight line, and are welded and fixed to predetermined positions of the corresponding threshing cylinder frames 47 in a state of being positioned on a line connecting the center of the support shaft 15 and the center of the threshing cylinder frame 47.

The threshing teeth 48C provided at the rear end of the threshing cylinder 16, that is, the rear end of the threshing processing section 42, are of a stepped form having a small diameter section inserted into the corresponding mounting hole 47A and a large diameter section 48b restricting insertion into the mounting hole 47A, the small diameter section is formed with a male screw section 48a for fixing to the threshing cylinder frame 47, and the large diameter section 48b is formed in a curved shape of "く", and is detachably fixed to a predetermined position of the corresponding threshing cylinder frame 47 by a nut 64 in a state where its protruding section has a sweep angle θ b (see fig. 7) inclined toward the upstream side in the rotation direction of the threshing cylinder 5.

That is, since the threshing teeth 48A and the threshing teeth 48C located at both front and rear end portions of the threshing processing section 42 are detachable, when the threshing teeth 48 located on the upstream side in the threshing processing direction (the threshing teeth 48B located at the middle portion of the threshing processing section 42 on the upstream side in the threshing processing direction) are worn significantly in long-term use, the orientation of the threshing cylinder frames 47 can be changed, and when the positions of the threshing teeth 48 are changed to the positions where the threshing teeth 48 located on the upstream side in the threshing processing direction and the threshing teeth 48 located on the downstream side in the threshing processing direction are changed, the threshing teeth 48A and the threshing teeth 48C located at both front and rear end portions are changed to positions opposite to the original positions with respect to the threshing cylinder 16 by changing the orientation of the threshing cylinder frames 47, and therefore, the threshing teeth 48A, 48C can be replaced, 48C return to their original positions.

Further, on the downstream side in the threshing processing direction where the threshing straw amount increases, the threshing teeth 48C located at the rear end portion of the threshing cylinder 5 are restrained from catching the threshing straw due to the presence of the sweep angle θ b thereof, so that retention of the threshing straw due to the catching can be restrained, and discharge of the threshing straw (discharged straw) from the discharge port 23 can be promoted.

As a result, the threshing performance and the threshing efficiency can be improved, and the threshing device has excellent treatment ability and maintenance ability for ensuring the excellent treatment ability for a long period of time.

As shown in fig. 3, 4, and 8, the concave 17 is provided with a plurality of longitudinal bars 66 made of a strip steel plate arranged in a front-rear direction on the base frame 65 at a constant interval of in the circumferential direction of the threshing cylinder 16, a plurality of 1 st horizontal bars 67 made of a strip steel plate curved in an arc shape arranged in a left-right direction at a constant interval of in the front-rear direction which is the fulcrum direction of the threshing cylinder 16, and a plurality of 2 nd horizontal bars 68 made of piano wire materials curved in an arc shape arranged in a left-right direction at a constant interval of in the front-rear direction between the adjacent 1 st horizontal bars 67, and has a mesh of a rectangular shape with a horizontal length in the circumferential direction of the threshing cylinder 16 longer than the length in the front-rear direction.

That is, by configuring the concave plate 17 such that the mesh is a horizontally long rectangle that is long in the rotation direction of the threshing cylinder 16, the single grain grains and the like obtained by the threshing process performed on the cut straw easily leak from the concave plate 17, and thereby, it is possible to avoid the peeled grains generated by suppressing the leakage of the single grain grains from the concave plate 17.

As shown in fig. 3 and 4, in the threshing device, power from a transmission case outside the drawing is transmitted to the support shaft 20A of the wind turbine 20 via the belt-driven 1 st transmission mechanism 69, and power from the support shaft 20A is transmitted to the support shaft 15 of the threshing cylinder 16 via the belt-driven 2 nd transmission mechanism 70 and the shaft-driven 3 rd transmission mechanism 71, and is transmitted to the feeder 13 via the 2 nd transmission mechanism 70 and the belt-tensioned transmission clutch 72.

In addition, reference numeral 24 shown in fig. 3 and 4 is a top plate openably and closably provided on the upper part of the threshing device, and a plurality of dust feed valves 49 for guiding the harvested straws in the threshing chamber 14 to the downstream side in the threshing process direction in accordance with the rotation operation of the threshing cylinder 16 are fixedly provided on the inner surface thereof in a state of being arranged at regular intervals of in the front-rear direction, and the dust feed valves 49 may be provided in a movable type in which the opening degree is adjusted in accordance with the amount of the threshing process in the threshing chamber 14, whereby improvement of the threshing performance and the threshing efficiency can be achieved by advancing steps.

As shown in fig. 4 to 7 and 9, longitudinally oriented support frames 50, 51 for supporting the receiving net 17 and the top plate 24 are provided at positions spaced apart from the rotation locus K of the threshing teeth 48 at predetermined intervals on the left and right outer sides of the threshing cylinder 16, and a plurality of stalk cutters 52 are provided on a support frame ( example of the fixing member) 51 provided on the right side of the threshing cylinder 16, which is the downstream side in the rotation direction of the threshing cylinder 16, of the support frames 50, 51.

Each stalk cutter 52 is provided on the support frame 51 at a position on the upstream side in the threshing process direction from the stalk discharge port 18 in a state shifted from the position of the corresponding threshing teeth 48 by 1/4 pitches (1/4P) between the rotation trajectories K of the corresponding threshing teeth 48 from the outside of the threshing teeth 48.

According to this configuration, the harvested straws fed from the feed port 25 into the threshing chamber 14 are fed through the threshing cylinder 16 in a rotating motion while being subjected to the threshing process , and when the straws are fed to the downstream side in the threshing process direction by this feeding, the straws are fed toward the straw discharge port 18 while being pushed against the straw cutter 52 and cut every time the straws are fed to the upper side of the threshing chamber 14 by the subsequent threshing process, and the straws flow down from the straw discharge port 18 to the discharge port 23 in a chopped state as they reach the straw discharge port 18, and are discharged to the outside of the vehicle through the discharge port 23.

That is, since the cut straws are cut up by the straw cutter 52 while performing the threshing process at on the downstream side in the threshing process direction, it is possible to prevent the cut straws from being wound around the threshing cylinder 16 and the long straws from being entangled with each other due to the threshing process performed in a state of long straws, and it is possible to avoid an increase in the conveying load due to the winding or entanglement, and to eliminate the need for straw disposal after harvesting work required when the long straws are discharged to the outside of the vehicle in a state of long straws.

Further, since the cut straw is not cut by the straw cutting blade 52 on the upstream side in the threshing processing direction where there are many ungranulated straws, the possibility that the undrawn grains that are easily cut by the straw cutting blade 52 due to adhering to the cut straw and the cut straw are damaged due to the cutting action of the straw cutting blade 52 can be avoided, and even if the grains enter between the straws that are lumpy due to the entanglement of the long straws or the like on the upstream side in the threshing processing direction, the grains that enter between the lumpy straws can be taken out by the cutting action of the straw cutting blade 52 on the downstream side in the threshing processing direction, and the occurrence of the loss of class 3 caused by the grains that enter between the lumpy straws and the lumpy straw being discharged to the outside of the vehicle can be avoided.

Further, since the straw cutter 52 is provided on the upstream side of the straw discharge opening 18 in the threshing process direction, the grains taken out from the lump straws by the cutting action of the straw cutter 52 leak down from the receiving net 17 toward the swing sorting mechanism 19, and therefore, the loss of category 3 caused by the grains taken out from the lump straws flowing down from the straw discharge opening 18 can be avoided.

Further, since it is not necessary to provide a dedicated chopper for chopping the discharged straw after the threshing process, the structure can be simplified and the cost can be reduced, and the load on the whole combine harvester due to the reduction in weight of the vehicle body can be reduced.

As shown in fig. 4 to 7 and 9, each stalk cutter 52 is formed by opposing the pair of ground by the two side walls 53a of the steel plate member 53 bent in the shape of コ, and the intermediate wall 53B of the steel plate member 53 is formed as a connecting portion bolted to the support frame 51, whereby workability in assembling the stalk cutters 52 can be improved as compared with a case where each stalk cutter 52 is formed independently and bolted to the support frame 51.

Each side wall 53A of the steel plate member 53 is formed in an isosceles triangle shape as viewed in the front-rear direction in the assembled state, and the upper and lower equilateral portions thereof serve as the blade portion 52a of the stalk cutter 52.

That is, each of the stalk cutters 52 has the blade portion 52a on both the upper and lower edge portions thereof, and the used blade portion 52a is changed by changing the orientation thereof in a vertically reversed manner, so that, when the sharpness of the blade portion 52a in use is reduced due to wear, chipping, or the like, the used blade portion 52a can be replaced by changing the orientation of the stalk cutter 52 without grinding or replacing the stalk cutter 52, and thus, the stalk cutter can be handled easily and at low cost.

As shown in fig. 10, the rough screen 31 for rough use is composed of a sorting plate 54 made of a steel plate, the sorting plate 54 is formed by punching out a plurality of sorting pieces 54A so as to have an upward scaly shape inclined upward toward the upper side of the downstream side in the sorting direction, and a plurality of drain openings 54B are formed in a staggered shape in which the sorting pieces 54A in the rear row are positioned in the front row and the sorting pieces 54A in the front row are staggered in the front-rear left-right direction, and the sorting plate 54 is bolted to the screen box 29 in a tilted posture of being tilted backward toward the upper side toward the downstream side in the sorting direction.

That is, since the coarse screen 31 for coarse use is configured by the sorting plate 54, the structure can be simplified and the cost can be reduced as compared with a case where the coarse screen 31 is configured by arranging a plurality of fish scales (チャフリップ) made of, for example, a strip-shaped steel plate at regular intervals of intervals in the front-rear direction.

Further, since the plurality of sorting pieces 54A are formed in a staggered manner in the front, rear, left, and right directions, in the sorting process, the sorting processed matter on the coarse screen 31 is not deviated to sides in the left-right direction but is uniformly distributed, so that the dropping of the grains from each of the dropping openings 54B can be promoted, and further, since the coarse screen 31 is tilted backward, the force with which the coarse screen 31 pushes the sorting processed matter upward on the upstream side in the sorting process direction becomes larger in the sorting process than in the case where the coarse screen 31 is equipped in a horizontal posture, whereby the conveyance of the sorting processed matter to the downstream side in the sorting direction can be suppressed, the vertical movement of the sorting processed matter becomes vigorous, the sorting of the sorting processed matter can be performed more efficiently, the occurrence of the 3 rd class loss of the grains discharged from the discharge port 23 to the outside of the vehicle can be reduced, the dropping of the grains having a large specific gravity from each of the dropping openings 54B can be promoted, and as a result, the grain collection efficiency is improved.

Among the sorting pieces 54A, the sorting pieces 54Aa located at the left and right center sides of the sorting plate 54 are formed in a substantially triangular shape in plan view, the other sorting pieces 54Ab located at the left and right end portions are formed shorter than the sorting pieces 54Aa located at the left and right center sides, and the respective drain openings 54B are formed in the same rectangular shape.

That is, the respective lower leakage openings 54B are formed in a rectangular shape larger than the sorting pieces 54Aa and 54Ab punched out in a substantially triangular shape or the like in a plan view, whereby the leakage of the grains or the like from the respective lower leakage openings 54B of the sorting plate 54 can be promoted, and the leakage of the grains or the like from the lower leakage openings 54B on the left and right center sides, which are easy to accumulate the sorting-processed object on the sorting plate 54, can be promoted by forming the sorting pieces 54Ab on the left and right end portions of the sorting plate 54 to be shorter than the sorting pieces 54Aa on the left and right center sides, and as a result, the 3 rd class loss in which the grains are discharged from the discharge port 23 to the outside of the vehicle without leaking from the respective lower leakage openings 54B of the sorting plate 54 can be reduced, and the reduction in the sorting efficiency due to the accumulation of the sorting-processed object on the left and right end portions of the sorting plate 54 can be avoided.

In this combine harvester, since the rotation direction of the threshing cylinder 16 is set to the right-hand side in the front view as described above, the amount of sorted processed objects leaking from the downstream side in the rotation direction of the threshing cylinder 16, that is, the right side of the receiving net 17 tends to increase.

Therefore, when the sorting-processed object leaked from the receiving net 17 is configured to directly flow down onto the swing sorting mechanism 19, the sorting-processed object supplied to the right side portion of the swing sorting mechanism 19 increases, the distribution of the sorting-processed object in the left-right direction of the swing sorting mechanism 19 becomes uneven, and a decrease in sorting efficiency and an increase in class 3 loss tend to be caused.

Therefore, in this combine harvester, as shown in fig. 4, the guide plate 56 that guides the sorted processed matter that has leaked from the right side of the receiving net 17 located on the downstream side in the rotation direction of the threshing cylinder 16 to the left and right center sides of the swing sorting mechanism 19 is provided on the right side wall 55 of the threshing device 5 located on the downstream side in the rotation direction of the threshing cylinder 16, and thereby most of the sorted processed matter that has leaked from the receiving net 17 is supplied to the left and right center sides of the swing sorting mechanism 19 and is uniformly distributed in the left and right direction in accordance with the swing of the swing sorting mechanism 19, so that the sorted processed matter can be uniformly distributed without being biased to the side of in the left and right direction of the swing sorting mechanism 19, and as a result, a decrease in sorting efficiency and an increase in class 3 loss due to the sorted processed matter being biased to the side of in the left and right direction of the swing sorting mechanism 19 can be avoided.

As shown in fig. 1, 2 and 11, an auxiliary table 57 used when performing a bagging work by a bagging device 6 mounted on the right half of the vehicle body frame 1 is provided at the right end of the vehicle body frame 1, and is switchable between a work posture in which the auxiliary table is laid down so as to extend outward to the right of the vehicle body and a storage posture in which the auxiliary table stands along the right end of the vehicle body frame 1 with a pivot 58 facing forward and backward as a fulcrum, and the auxiliary table is held in the storage posture by a fixing tool outside the figure while being held in the work posture by being brought into contact with the vehicle body frame 1.

The bagging device 6 is provided with a sunshade 63, and the sunshade 63 can be switched between an action posture covering the upper side of the operator who performs the bagging work on the auxiliary platform 57 and a storage posture positioned above the threshing device 5 with the support shaft 60 in the front-rear direction provided at the upper end of the grain tank 40 as a fulcrum, and the working posture is held by abutting against the 1 st stopper 61 in the front-rear direction provided on the right side of the upper end of the grain tank 40, and the storage posture is held by abutting against the 2 nd stopper 62 in the front-rear direction provided on the left side of the upper end of the grain tank 40.

That is, by switching the sunshade 63 to the acting posture, the bagging work on the auxiliary table 57 can be performed in a cool place, the working environment at the time of the bagging work can be improved, and the fatigue of the bagging work can be reduced.

The sunshade 63 includes: the frame portion 63A formed of a round pipe steel material bent into an コ shape and the sunshade portion 63B formed of a steel plate member inscribed in the frame portion 63A can function as a protection member for preventing other objects from coming into contact with the threshing device 5 from above by switching to the storage posture when the threshing device is moved or stored in a warehouse.

[ other embodiments ]

Other embodiments of the present invention are described below.

（1）

In the above embodiment, as shown in fig. 12, the threshing teeth 48A may be attached to a predetermined portion of the threshing cylinder frame 47 in a state in which the large diameter portion is bent into an "L" shape and the projecting end portion thereof has a conveying angle θ a (see fig. 12) so as to function as a conveying portion 48c that pushes the harvested straws to the downstream side in the threshing process direction during the rotation operation of the threshing cylinder 16.

That is, not only the cut straw raked and conveyed toward the downstream side in the threshing process direction by the raking section 41 but also the cut straw is conveyed toward the downstream side in the threshing process direction by the plurality of threshing teeth 48 formed in a line of along with the rotation operation of the threshing cylinder 16, but the threshing teeth 48A located on the front side of the threshing cylinder 16 push the threshed processed object toward the downstream side in the threshing process direction by the conveying section 48c on the upstream side in the threshing process direction where the amount of threshed processed object is large, so that the conveyance of the threshed processed object toward the downstream side in the threshing process direction is promoted, and therefore, the retention of the threshed processed object on the upstream side in the threshing process direction, the leakage of the threshed processed object from the supply port 25, and the like can be avoided.

In addition, most of the threshed straw on the upstream side in the threshing process direction is not threshed, and in the case of , the threshing teeth 48A located on the upstream side in the threshing process direction have the conveying portion 48c at the projecting end portion thereof, and the hitting action portion for the threshed straw is enlarged, whereby a large amount of non-threshed straw on the upstream side in the threshing process direction can be hit efficiently by the threshing teeth 48A having enlarged the hitting action portion.

（2）

The threshing device may be a threshing device loaded in a semi-feed type combine harvester that supplies only the ear tip side from which the straw is cut to the threshing chamber 14.

（3）

The threshing cylinder 2 may be a threshing cylinder without the raking section 41, or a threshing cylinder having the raking section 41 with the comb teeth or threshing teeth 48 instead of the spiral teeth 43.

（4）

The rod-like members 47 of the threshing cylinder 16 may be divided into a plurality of parts in the front-rear direction, and for example, a 2-part structure divided into two parts, i.e., a front half part between the 1 st link plate 80 and the 2 nd link plate 81 and a rear half part between the 2 nd link plate 81 and the 3 rd link plate 82, and a 3-part structure divided into three parts, i.e., a front part side provided with the threshing teeth 48A having the conveying part 48B, an intermediate part provided with the threshing teeth 48B formed in a line , and a rear end part provided with the threshing teeth 48C having the sweep angle θ B, may be considered as the dividing means.

Further, when each rod 47 has a 2-split structure in which the front half and the rear half are interchangeable, each rod 47 may have a 3-split structure in which the front half and the rear half are interchangeable, and when each rod 47 has a front portion side having the threshing teeth 48A, an intermediate portion having the threshing teeth 48B, and a rear end portion having the threshing teeth 48C, each rod may be configured to be capable of being turned upside down by changing its orientation.

（5）

As shown in fig. 13, an angle member may be used as the rod-like member 47 of the threshing cylinder 16, and although not shown, a round bar member, an angle pipe member, a groove-like member, or the like may be used.

（6）

As shown in fig. 13, the threshing cylinder 16 may be fixed with the bar-shaped member 47 so that the orientation thereof is not changeable.

（7）

The number of the rod-like members 47 provided in the threshing cylinder 2 may be variously changed, and for example, 8 rod-like members 47 may be provided as shown in fig. 14.

（8）

Instead of the member formed in the straight line, the rod-like member 47 may be formed by twisting so that the side closer to the rear end portion thereof is located on the upstream side in the rotation direction of the threshing cylinder 16 when the rod-like member is placed in the posture along the front-rear direction of the support shaft 15, or conversely, so that the side closer to the rear end portion thereof is located on the downstream side in the rotation direction of the threshing cylinder 16 when the rod-like member is placed in the posture along the front-rear direction of the support shaft 15.

Among them, if the former is used as the rod-shaped member 47, retention of threshing processed matter in the threshing chamber 14 can be suppressed, so the threshing cylinder 16 can be configured as a threshing cylinder suitable for crops having high threshing performance, whereas if the latter is used as the rod-shaped member 47, retention of threshing processed matter in the threshing chamber 14 is facilitated, so the threshing cylinder 16 can be configured as a threshing cylinder suitable for crops having low threshing performance.

（9）

The threshing teeth 48 of the threshing cylinder 16 may be formed in a straight line, and may be welded and fixed to a predetermined position of the corresponding threshing cylinder frame 47 in a state of being positioned on a straight line connecting the center of the support shaft 15 and the center of the threshing cylinder frame 47 (similar to the threshing teeth 48B at the middle portion).

（10）

As shown in fig. 13, as the threshing teeth 48 of the threshing cylinder 2, the threshing teeth 48A on the front side thereof may be formed in a line similarly to the threshing teeth 48B on the middle portion, and the threshing teeth 48C on the rear end portion thereof may be formed in a line similarly to the threshing teeth 48B on the middle portion.

（11）

The threshing cylinder 2 may be provided with male screw portions 48a on the base sides of all the threshing teeth 48, and all the threshing teeth 48 may be detachably fixed to predetermined positions of the corresponding rod-like members 47 by nuts 64.

（12）

As shown in fig. 13, the threshing teeth 48 may be configured to have a relatively long male screw portion 48a on the base end side of the mounting hole 47A inserted into the corresponding rod-like member 47, and pairs of nuts 64 screwed to the male screw portion 48a may be provided, and the length protruding outward from the corresponding rod-like member 47 may be adjusted by changing the position at which the pairs of nuts 64 are screwed to the male screw portion 48 a.

（13）

The threshing teeth 48 may be formed of angle bar steel or a threshing cylinder frame, or may be bent in a "U" shape.

（14）

The arrangement interval of the threshing teeth 48 may be variously changed, and for example, when the number of the bars 47 is set to a multiple of 3, each threshing tooth 48 is positioned in a state where it is shifted from the threshing teeth 48 provided in the adjacent bar 47 by 1/3 pitches in the front-rear direction, or when the number of the bars 47 is set to a multiple of 4, each threshing tooth 48 is positioned in a state where it is shifted from the threshing teeth 48 provided in the adjacent bar 47 by 1/4 pitches in the front-rear direction; further, the arrangement interval of the threshing teeth 48 on the front side and the rear side may be different so that the front-rear interval of the threshing teeth 48 on the rear side is larger than the front-rear interval of the threshing teeth 48 on the front side.

（15）

As the receiving net 17, for example, a mesh may be formed in a vertically long rectangular shape, and the length in the front-rear direction of the threshing cylinder 16 may be longer than the length in the circumferential direction, or a resin molded product may be used.

Claims (24)

1, kinds of whole stalk feeding type combine harvester, which is loaded with a threshing device (5),

the threshing device (5) is provided with:

a threshing chamber (14) having a straw supply opening (25) at the front;

a threshing cylinder (16) which is provided in the threshing chamber (14), rotates about a support shaft (15) that faces forward and backward, and performs threshing processing on the straw supplied from the supply port (25) as it rotates;

a receiving net (17) disposed below the threshing cylinder (16) for allowing the processed material threshed by the threshing cylinder (16) to leak;

a top plate (24) provided above the threshing cylinder (16),

it is characterized in that the preparation method is characterized in that,

an internal space (S) is formed inside the threshing cylinder (16), the internal space (S) is communicated with the threshing chamber (14) and is used as a processing space for threshing processing,

the threshing cylinder (16) has:

a plurality of rod-shaped members (47) arranged in a state of being arranged at a predetermined interval in the circumferential direction of the threshing cylinder (16) in a posture of being oriented in the front-rear direction along the support shaft (15), the interval of the plurality of rod-shaped members (47) allowing the threshing processed object to enter the internal space (S);

a plurality of threshing teeth (48) arranged on the rod-shaped members (47) at intervals in the front-rear direction and protruding from the rod-shaped members (47) to the outside of the threshing cylinder (16),

a plurality of dust sending valves (49) are arranged on the inner surface of the top plate (24) at intervals of in the front-rear direction, and the plurality of dust sending valves (49) guide the harvested straws in the threshing chamber (14) to the downstream side in the threshing processing direction along with the rotation of the threshing cylinder (16).

2. The whole straw feeding type combine harvester according to claim 1,

a rake part (41) with a shape that becomes thinner toward the tail end is provided at the front end of the threshing cylinder (16), the threshing processing part (42) is connected with the rear end of the rake part (41),

the raking part (41) is provided with spiral teeth (43), the spiral teeth (43) rake and convey the straws supplied from the supply port (25) to the threshing processing part (42) along with the rotation around the support shaft (15),

a 1 st support plate (44) is provided in front of the support shaft (15),

the 1 st support plate (44) is mounted to the rear end of the raking part (41).

3. The whole straw feeding type combine harvester according to claim 1,

the support shaft (15) is rotatably mounted across a front wall (26) and a rear wall (27) of the threshing chamber (14).

4. The whole straw feeding type combine harvester according to claim 2,

the support shaft (15) is rotatably mounted across a front wall (26) and a rear wall (27) of the threshing chamber (14).

5. A whole straw feed combine harvester according to any one of claims 1 to 4,

the rod-like members are configured to be thinner than the support shaft (15).

6. A whole straw feed combine harvester according to any one of claims 1 to 4,

a straw discharge opening (18) is formed on the downstream side of the threshing device (5) in the threshing process direction.

7. A whole straw feed combine harvester according to any one of claims 1 to 4,

the plurality of rod-like members (47) are formed of a pipe member which is a circular pipe member or an angular pipe member,

the pipe member is provided with a plurality of mounting holes (47A) penetrating along the radial direction of the threshing cylinder (16),

the threshing teeth (48) are inserted into the mounting hole (47A), and the threshing teeth (48) are fixed to the pipe member in the following state: the threshing teeth (48) are supported at two positions, namely, a position of the pipe member on the inner peripheral side of the threshing cylinder and a position of the pipe member on the outer peripheral side of the threshing cylinder, in the radial direction of the threshing cylinder (16).

8. The whole straw feeding type combine harvester according to claim 7,

the tip of the threshing teeth (48) protrudes from the mounting hole (47A) to the inside in the radial direction of the threshing cylinder (16), and the protruding portions of the threshing teeth (48) are fixed to the pipe member on the inside in the radial direction.

9. The whole straw feeding type combine harvester according to claim 7,

the tip of the threshing teeth (48) protrudes from the mounting hole (47A) to the inside in the radial direction of the threshing cylinder (16), and the protruding parts of the threshing teeth (48) are welded and fixed to the pipe member on the inside in the radial direction.

10. A whole straw feed combine harvester according to any one of claims 1 to 4,

the front end of the rod-shaped component is provided with a 1 st connecting plate (80) extending towards the radial inner side of the threshing cylinder (16),

a1 st support plate (44) is provided at the front of the support shaft (15), and the 1 st connecting plate (80) is connected to the 1 st support plate (44) by a bolt from the front to the rear, whereby the rod-like member is connected to and supported by the 1 st support plate (44).

11. The whole straw feeding type combine harvester according to claim 10,

the rod-shaped member is provided with a 2 nd connecting plate (81) extending toward the inner side in the radial direction of the threshing cylinder (16) at the front and rear middle parts thereof,

a2 nd support plate (45) is provided at a front-rear intermediate portion of the support shaft (15), and the rod-like member is connected and supported by the 2 nd support plate (45) by connecting the 2 nd connecting plate (81) to the 2 nd support plate (45) by a bolt from the front-rear direction.

12. The whole straw feeding type combine harvester of claim 11,

the orientation of the rod-like member (47) can be changed to a normal posture and a reversed posture opposite to the normal posture in the front-back direction,

the bolt connection from the 2 nd connecting plate (81) to the 2 nd supporting plate (45) can be performed from both the front and rear of the 2 nd supporting plate (45), and when the orientation of the rod-like member (47) is changed between the normal posture and the reversed posture, the direction of the bolt connection is reversed.

13. The whole straw feeding type combine harvester of claim 11,

the rear end of the rod-shaped component is provided with a 3 rd connecting plate (82) extending towards the radial direction of the threshing cylinder (16),

a3 rd support plate (46) is provided at the rear end of the support shaft (15), and the 3 rd connecting plate (82) is connected to the 3 rd support plate (46) by a bolt from the front to the rear of the 3 rd support plate (46), whereby the rod-like member is connected to and supported by the 3 rd support plate (46).

14. A whole straw feed combine harvester according to any one of claims 1 to 4,

the front end of the threshing cylinder (16) is provided with a raking part (41) which is thinner and thinner towards the tail end,

the raking part (41) is provided with a spiral tooth (43), the spiral tooth (43) rakes and conveys the straw supplied from the supply port (25) towards the rear direction along with the rotation around the support shaft (15),

the outside air sucked from the supply port (25) in association with the rotation of the helical teeth (43) flows toward the periphery of the threshing cylinder (16) and the internal space (S) together with the straw raked and conveyed by the raking section (41).

15. A whole straw feed combine harvester according to any one of claims 1 to 4,

the orientation of the rod-like member can be changed to a normal posture and a reversed posture opposite to the normal posture in the front-back direction,

the threshing teeth (48B) provided at the front and rear middle parts of the threshing cylinder (16) among the plurality of threshing teeth (48) are welded and fixed to the rod-like member,

among the threshing teeth (48), threshing teeth (48A, 48C) provided at the front end and the rear end of the threshing cylinder (16) are detachably fixed to the rod-like member.

16. The whole straw feeding type combine harvester of claim 15,

a projecting part having a receding angle inclined toward the upstream side in the rotation direction of the threshing cylinder is provided on a detachable threshing tooth (48C) provided at the rear end of the threshing cylinder (16).

17. The whole straw feeding type combine harvester of claim 16,

the detachable threshing teeth (48A) provided at the front end of the threshing cylinder (16) are formed to have a conveying section (48 c) at the protruding end thereof, and the conveying section (48 c) pushes and conveys the processed object in the processing chamber (14) rearward in accordance with the rotation around the support shaft (15).

18. A whole straw feed combine harvester according to any one of claims 1 to 4,

the plurality of threshing teeth (48) are formed of a round bar steel material, a corner bar steel material, or a round pipe member.

19. A whole straw feed combine harvester according to any one of claims 1 to 4,

the receiving net (17) is arranged on a base frame (65) in a front-back direction with a plurality of longitudinal strips (66) made of strip steel plates at intervals of in the circumferential direction of the threshing cylinder (16),

a plurality of 1 st horizontal bars (67) formed by strip steel plates bent into an arc shape are arranged in a left-right direction at intervals of in the front-back direction which is the fulcrum direction of the threshing cylinder (16),

a plurality of 2 nd horizontal bars (68) formed by piano wire rods bent into an arc shape are arranged in a left-right direction between the adjacent 1 st horizontal bars (67) at intervals of in the front-back direction,

the mesh of the receiving net (17) is formed in a rectangular shape, and the length of the rectangular shape in the circumferential direction of the threshing cylinder (16) is longer than the length in the front-rear direction.

20. A whole straw feed combine harvester according to any one of claims 1 to 4,

the rod-like members (47) are supported by a 1 st support plate (44) and a 3 rd support plate (46) provided in front of and behind the support shaft (15) and a 2 nd support plate (45) provided between the 1 st support plate (44) and the 3 rd support plate (46),

the rod-like members (47) are formed in a straight line extending between the 1 st support plate (44) and the 3 rd support plate (46) without being divided,

the front and rear middle parts of the linear rod-shaped component (47) are provided with a body which is provided with a 2 nd connecting plate (81) extending from the rod-shaped component to the inner side of the threshing cylinder (16) in the radial direction,

the 2 nd connecting plate (81) is connected to the outer peripheral portion of the 2 nd supporting plate (45) by bolts for connection, in a state where the entire bolts for connection are positioned further inside in the radial direction than the outer periphery of the bar-shaped member (47), on the inner side of the bar-shaped member (47) in the radial direction of the threshing cylinder (16), and the front-rear intermediate portion of the bar-shaped member (47) is supported by the outer peripheral side of the 2 nd supporting plate (45).

21. The whole straw feeding type combine harvester of claim 20,

the front end of the linear rod-shaped component (47) is provided with a body which is provided with a 1 st connecting plate (80) extending from the rod-shaped component to the inner side of the threshing cylinder (16) in the radial direction,

in the state that the whole connecting bolt is positioned more to the inner side of the radial direction than the outer periphery of the rod-shaped component (47) on the inner side of the rod-shaped component (47) in the radial direction of the threshing cylinder (16), the 1 st connecting plate (80) is connected to the 1 st supporting plate (44) by the bolt, the front part of the rod-shaped component (47) is supported on the 1 st supporting plate (44),

a body is provided with a 3 rd connecting plate (82) extending from the rod-shaped member to the inner side of the threshing cylinder (16) in the radial direction at the rear end of the linear rod-shaped member (47),

the 3 rd connecting plate (82) is connected to the 3 rd supporting plate (46) by a bolt for connection in a state where the whole bolt for connection is positioned further to the inside in the radial direction than the outer periphery of the rod-shaped member (47) on the inner side of the rod-shaped member (47) in the radial direction of the threshing cylinder (16), and the rear part of the rod-shaped member (47) is supported by the 3 rd supporting plate (46).

22. The whole straw feeding type combine harvester of claim 21,

the 3 rd connecting plate (82) is formed wider than the rod-like member (47) in the circumferential direction of the threshing cylinder (16).

23. The whole straw feeding type combine harvester of claim 21,

the 3 rd connecting plate (82) is connected to the 3 rd support plate (46) at two positions in the circumferential direction of the threshing cylinder (16).

24. A whole straw feed combine harvester according to any one of claims 21 to 23,

the 1 st connecting plate (80) is connected to the 1 st support plate (44) by means of bolts oriented in the front-rear direction,

the 2 nd connecting plate (81) is connected to the 2 nd support plate (45) by means of bolts oriented in the front-rear direction,

the 3 rd connecting plate (82) is connected to the 3 rd support plate (46) by means of front and rear bolts.

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