CN107771539B - Threshing device - Google Patents

Abstract

The invention provides a threshing device with excellent processing capacity, which can not cause the increase of the load required by threshing processing even in the occasion of supplying a large amount of threshing processing objects and can perform sufficient threshing processing on the threshing processing objects. The threshing device is provided with a threshing cylinder (16) which is driven to rotate by taking a support shaft (15) as a fulcrum to thresh the harvested straws supplied to a threshing chamber (14), wherein the threshing cylinder (16) comprises a plurality of rod-shaped components (47), supporting components (44, 46) and a plurality of threshing teeth (48), and the rod-shaped components (47) are arranged at a preset interval in the circumferential direction of the threshing cylinder (16) along the posture of the support shaft (15); support members (44, 46) are provided in front and rear of the support shaft (15) so as to support the rod-like members (47); a plurality of threshing teeth (48) are provided on each bar-shaped member (47), and are arranged at predetermined intervals in the front-rear direction in a posture of protruding from the bar-shaped member (47) toward the outside of the threshing cylinder (16).

Description

Threshing device

The present application is a divisional application of an invention patent application entitled "threshing device" on the date of application No. 200710161330.9/9/28/2007 and an invention patent application entitled "threshing device" on the date of application No. 201410500900.2/9/28/2007.

Technical Field

The present invention relates to a threshing device provided with a threshing cylinder that is driven to rotate about a support shaft as a fulcrum to thresh harvested straw supplied to a threshing chamber.

Background

As a threshing cylinder structure of the above threshing device, there is a structure in which a threshing cylinder is configured by providing spiral threshing teeth or the like on an outer periphery of a straight cylinder portion formed in a cylindrical shape (for example, see patent document 1).

Further, there is a structure in which a threshing cylinder is configured by providing a plurality of threshing teeth curved in a V-shape or the like on the outer periphery of a cylindrical cylinder main body (for example, see patent document 2).

[ patent document 1] Japanese patent application laid-open No. 11-266666 (JP-11-266666A)

[ patent document 2] Japanese patent application laid-open No. 2006-67910 (JP 2006-067910A).

In the above configuration, since most of the threshing chamber is used as the arrangement space of the threshing cylinder and only a small space remaining around the threshing cylinder is used as the processing space for the threshing process, there is a risk that the processing space is saturated when a large amount of harvested straws are supplied to the threshing chamber as the threshing processed material by high-speed operation or the like, and when the saturation occurs, the threshing processed material stays in the processing space, so that there is a problem that the threshing processed material leaks from the receiving net without being sufficiently threshed, or a problem that a load required for the threshing process is increased to damage a transmission system or the like for transmission to the threshing cylinder is likely to occur.

Disclosure of Invention

The purpose of the present invention is to provide a threshing device having a threshing cylinder structure with excellent processing capacity, wherein the threshing cylinder structure does not increase the load required for threshing even when a large amount of threshing processing objects are supplied, and can perform sufficient threshing processing on the threshing processing objects.

In order to achieve the above object, the present invention provides a threshing cylinder for threshing harvested straw fed into a threshing chamber by being driven to rotate about a support shaft, wherein the threshing cylinder includes a plurality of rod-shaped members, a support member, and a plurality of threshing teeth, the plurality of rod-shaped members are arranged in a circumferential direction of the threshing cylinder at predetermined intervals in a posture along the support shaft, the support member is provided in front of and behind the support shaft so as to support the rod-shaped members, and the plurality of threshing teeth are provided in the respective rod-shaped members and arranged in a front-rear direction at predetermined intervals in a posture protruding outward from the rod-shaped members toward the threshing cylinder.

According to this feature, the threshing cylinder has a space inside that communicates with the threshing chamber, and the threshing cylinder allows the threshing object to enter the space. Therefore, during the rotation operation, while the threshing processed objects around the rotation shaft and the threshing processed objects entering the internal space are stirred, the threshing processed objects are beaten or combed by the plurality of rod-shaped members and the threshing teeth, and the threshing processing is performed.

That is, even when a large amount of harvested straws are supplied to the threshing chamber as the threshing processed matter, the internal space of the threshing cylinder can be effectively used as the processing space for the threshing processing, and therefore, the retention of the threshing processed matter in the processing space or the saturation of the processing space can be avoided. As a result, it is possible to avoid the occurrence of problems such as the occurrence of a problem that the threshed objects leak from the receiving net without being sufficiently threshed, the occurrence of a problem that the load required for the threshing process increases and the damage to the transmission system for the transmission of the threshing cylinder is caused, which may be caused by the retention of the threshed objects or the saturation of the processing space.

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. Further, when the threshing cylinder is rotated, 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 for performing threshing processing by hitting or combing the threshing processed object, and thus the threshing performance can be improved.

In addition to the above configuration, when the threshing cylinder is provided with a partition member for partitioning the internal space thereof into front and rear spaces, the following advantages can be obtained.

According to this feature, the partition member can suppress the flow of the grain that is singulated by the threshing process at the front side of the threshing cylinder or the ungranulated straw or the like that enters the internal space of the threshing cylinder at the initial stage of the threshing process to the downstream side in the threshing process direction, and the singulated grain or ungranulated straw or the like is guided to the periphery of the threshing cylinder along with the rotation of the threshing cylinder, so that the occurrence of the tertiary loss due to the singulated grain or ungranulated straw or the like passing through the internal space of the threshing cylinder without staying and being discharged from the downstream end in the threshing process direction along with the threshed straw can be prevented.

Therefore, even when a large amount of the threshing object is supplied, the threshing cylinder structure of the threshing device can be provided which can perform sufficient threshing processing on the threshing object without increasing the load required for the threshing processing, can prevent the occurrence of tertiary loss, can improve threshing performance and grain recovery efficiency while avoiding damage to a threshing cylinder transmission system and the like due to an increase in load, and as a result, has excellent durability and processing performance.

Further, if a wind turbine that generates separation wind is provided and the separation wind from the wind turbine is made to flow toward the partition member, the following advantages are obtained.

According to this feature, the threshing processed object received by the partition member is blown open to the periphery of the partition member (the periphery of the threshing cylinder) by the separation wind from the wind turbine, and flows from the periphery of the partition member toward the downstream side in the threshing processing direction as the threshing cylinder rotates, so that the threshing processed object can be prevented from accumulating in the front part of the partition member.

Therefore, the reduction of the processing capacity due to the accumulation of the threshed processing material can be prevented.

In a preferred embodiment, an upper portion side of the threshing cylinder is covered with a top plate, and a plurality of dust feed valves that guide the harvested straws to a downstream side in a threshing process direction in accordance with rotational driving of the threshing cylinder are provided on the top plate.

According to this characteristic configuration, the harvested straw supplied to the threshing chamber is conveyed toward the upper portion of the threshing chamber while being subjected to a threshing action by a large amount of hammering and combing performed by the plurality of threshing teeth as the threshing cylinder rotates, and is guided toward the downstream side in the threshing process direction by the plurality of dust sending valves as it reaches the upper portion of the threshing chamber.

That is, the threshing cylinder is provided with a plurality of threshing teeth, and thus, it is possible to sufficiently obtain an appropriate threshing action by striking, combing, or the like of the threshing teeth against the threshed object, and to convey the threshed object toward the downstream side in the threshing process direction.

Further, if the threshing teeth are formed to have, for example, a guide portion or the like that guides the threshed object toward the downstream side in the threshing process direction as the threshing cylinder rotates, the threshed object can be more favorably conveyed toward the downstream side in the threshing process direction, and if the threshing teeth are formed in a shape dedicated to threshing that merely performs striking or combing on the threshed object, a more suitable threshing action can be obtained with respect to the threshed object.

Therefore, the dust sending valve mainly conveys the threshed objects to the downstream side of the threshing processing direction, so that the threshing structure of the all-feed type combine harvester can realize the threshing performance and the improvement of the recovery efficiency without damaging the conveying performance of the threshed objects to the downstream side of the threshing processing direction.

The dust sending valve is formed to have a length that spans both left and right side edge portions of the top plate, and in this case, the length of the dust sending valve provided in the top plate can be sufficiently long, and thus, the conveyance guide of the threshed processed object toward the downstream side in the threshing process direction by the dust sending valve can be performed more favorably. Therefore, the threshing performance and the grain recovery efficiency of the plurality of threshing teeth can be improved, and the conveying performance of the threshing processed object toward the downstream side in the threshing processing direction can be improved.

Further, when the top plate is formed to be curved substantially along a rotation trajectory drawn by the tips of the threshing teeth in accordance with the rotation of the threshing cylinder, the threshing object conveyed to the upper portion of the threshing chamber in accordance with the rotation of the threshing cylinder can be smoothly guided downward in the downstream side in the threshing process direction along the top plate or the dust feed valve. Therefore, the threshing performance and the grain recovery efficiency of the plurality of threshing teeth can be improved, the conveying performance of the threshing processed object toward the downstream side of the threshing processing direction can be improved, and the grain damage and the like caused by collision with the top plate can be avoided.

In a preferred embodiment, a screw blade is provided at a front end portion of the threshing cylinder, the screw blade rakes in toward the rear side in accordance with rotation of the threshing cylinder and conveys harvested straw fed toward the front end portion, and the screw blade is detachably attached.

According to this characteristic configuration, when the helical blade is worn significantly by being in contact with harvested straw or the like for a long period of time, only the worn helical blade can be replaced. Thus, compared to the case where the helical blade is provided at the front end of the threshing cylinder in an unassemblable manner by welding or the like, the time and cost required for replacing the helical blade can be significantly reduced, and as a result, the worn helical blade can be easily replaced. Further, since the worn-out spiral blades are easily replaced, it is possible to easily avoid a problem that the raking-in conveying action of the spiral blades on the harvested straws is reduced when the set spiral blades are worn, and the threshing processing capacity is reduced due to the reduction.

Therefore, by implementing a simple improvement in which the screw blade is detachably attached to the front end portion of the threshing cylinder, appropriate measures against wear of the screw blade can be simply and inexpensively performed, and as a result, a reduction in threshing processing capacity due to wear of the screw blade can be easily avoided.

In addition to this configuration, a conveyance auxiliary guide is provided below the threshing cylinder, the conveyance auxiliary guide being disposed so as to cover a front end portion of the threshing cylinder from below, receive harvested straw supplied and conveyed toward the front end portion of the threshing cylinder, and assist the raking-in conveyance of the harvested straw by the screw blade, the conveyance auxiliary guide being configured such that at least a portion located on a downstream side in a rotation direction of the threshing cylinder is detachable, and in this case, when the conveyance auxiliary guide is worn significantly due to a long-term contact with the harvested straw or the like, only the worn conveyance auxiliary guide can be replaced. As a result, compared to a case where the conveyance auxiliary guide is non-detachably attached to the support frame or the like by welding or the like, for example, the labor and cost required for replacing the conveyance auxiliary guide can be significantly reduced, and as a result, replacement of the worn conveyance auxiliary guide can be easily performed. Further, since the worn-out auxiliary conveying guide is easily replaced, it is possible to easily avoid a problem that the scraping and conveying action of the screw blade on the harvested straw is reduced due to the increased clearance formed between the screw blade and the auxiliary conveying guide, which is caused when the left-hand auxiliary conveying guide is worn, and the threshing processing capability is reduced due to the reduction.

In addition, the harvested straws and the like that are raked rearward by the spiral blades and conveyed as the threshing cylinder rotates are biased toward the downstream side in the rotation direction of the threshing cylinder that is concentrated in the conveying auxiliary guide, under the influence of the rotation of the threshing cylinder. Therefore, the more the part of the transportation auxiliary guide located on the downstream side in the rotation direction of the threshing cylinder comes into contact with the reaping straw or the like, the more the abrasion due to the contact is likely to occur.

Therefore, if the downstream side portion in the rotation direction of the threshing cylinder in the transportation auxiliary guide is configured to be detachable in view of this aspect, when the downstream side portion in the rotation direction of the threshing cylinder in the transportation auxiliary guide is significantly worn due to a long-term strong contact with harvested straw or the like, only the worn portion can be replaced. This can further reduce the cost required for replacement, as compared with the case where the entire conveyance auxiliary guide is replaced.

Therefore, by implementing a simple improvement in which at least a portion of the conveyance auxiliary guide located on the downstream side in the rotation direction of the threshing cylinder is detachably mounted, appropriate measures against wear of the conveyance auxiliary guide can be simply and inexpensively performed, and as a result, a reduction in threshing processing capacity due to wear of the conveyance auxiliary guide can be easily avoided.

In a preferred embodiment, a receiving net is provided so as to cover the threshing cylinder from below, a top plate is provided so as to cover the threshing cylinder from above, and a joint member formed to have a guide surface connecting the receiving net and the inner surface of the top plate in series is detachably provided between the receiving net and the top plate.

According to this feature, when the guide surface of the joint member is worn significantly by being brought into contact with harvested straw or the like for a long period of time, only the worn joint member can be replaced. As a result, the labor and cost required for replacing the worn seam member can be significantly reduced as compared with the case where the seam member is provided in an unassemblable manner on the receiving net or the top plate by welding or the like, and as a result, the worn seam member can be easily replaced. Further, since the worn-out joint member is easily replaced, it is possible to easily avoid a problem that the harvested straws or the like cannot smoothly flow across the receiving net and the top plate of the threshing cylinder and the threshing processing capacity is reduced due to the fact that the inner surface of the receiving net and the inner surface of the top plate cannot be connected in series by the guide surface of the joint member when the left joint member is worn.

Therefore, by performing a simple improvement in which the joint member is detachably provided between the receiving net and the top plate, it is possible to easily and inexpensively perform appropriate treatment for the wear of the joint member, and as a result, it is possible to easily avoid a reduction in threshing processing capacity due to the wear of the joint member.

Other characteristic configurations and advantageous effects obtained by the characteristic configurations will become apparent from reading the following description with reference to the accompanying drawings.

Drawings

Fig. 1 is an overall side view of a full-feed combine harvester.

Fig. 2 is an overall plan view of the whole-feed type combine harvester.

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

Fig. 4 is a partial vertical cross-sectional front view showing the structure of the front end of the threshing device.

Fig. 5 is a partial vertical cross-sectional front view showing the structure of the front and rear intermediate portions of the threshing device.

Fig. 6 is a plan view of a main part showing the configuration of the threshing cylinder and the conveyance auxiliary guide.

Fig. 7 is a cross-sectional plan view showing a main part of the threshing cylinder.

Fig. 8 is a sectional view showing a main part of the mounting structure of the helical blade.

Fig. 9 is a longitudinal rear view of the threshing cylinder showing the structure of the threshing cylinder.

Fig. 10 is a cross-sectional plan view showing a main part of another configuration of the threshing cylinder.

Fig. 11 is a vertical cross-sectional front view showing a main part of the structure of the seaming member.

Fig. 12 is a cross-sectional plan view showing a main part of the length and arrangement of the dust sending valve.

Fig. 13 is a plan view of a main part showing the configuration of the conveyance assisting guide.

Fig. 14 is a vertical cross-sectional side view showing a main part of the configuration of the conveyance auxiliary guide.

Fig. 15 is a perspective view showing a main part of the structure of the receiving net.

Fig. 16 is a perspective view showing a main part of the structure of the preliminary screening.

Fig. 17 is a longitudinal sectional front view of the transmission case.

FIG. 18 is a side view in partial cross-section of the transmission.

Fig. 19 is an explanatory diagram of the operation of the ventilator.

Fig. 20 is an exploded perspective view showing a schematic configuration of the ventilator.

Detailed Description

Fig. 1 shows an entire side surface of a whole feed type combine-harvester (whole combine-harvester) that harvests rice, wheat, or the like. The overall top surface is shown in fig. 2. As shown in these drawings, the all-feed combine harvester is mounted with an engine 2 and a transmission (not shown) at the front right portion of a machine body frame 1 formed of square tube steel or the like. A pair of left and right crawler travel devices 3 driven by power transmitted from an engine 2 via a transmission or the like are provided at a lower portion of the machine body frame 1. A harvesting conveyor 4 for harvesting and conveying the planted straw as a harvesting object backward is connected to the front part of the machine body frame 1 in a lifting and swinging manner. A threshing device 5 is mounted on the left half of the machine body frame 1, and the threshing device 5 performs threshing processing on the harvested straw from the harvesting conveyor 4 and also performs sorting processing on the processed material obtained by the threshing processing. A bagging device 6 is mounted on the right half of the machine body frame 1, and the bagging device 6 can store grains from the threshing device 5 and can bag the stored grains. A riding section 7 is formed at the right front portion of the body frame 1.

The left and right crawler travel devices 3 are configured such that a straight traveling state in which the left and right crawler travel devices 3 are driven at a constant speed and a differential steering state are switched and displayed by operating a steering system (not shown) based on a swing operation of a cross-swing type neutral return type joystick 8 provided in the riding operator 7 in the left-right direction.

On the left and right side end portions of the front end of the harvesting conveyor 4, there are provided crop dividers 9 for combing the planted straw into planted straw that is a harvesting object and planted straw other than the harvesting object as the machine body travels. Above the front portion of the harvesting conveyor 4, a rotary reel 10 is provided for raking the ear tip side of the planted straw of the harvesting target combed out by the left and right dividers 9 toward the rear. A cutting mechanism 11 for cutting the root side of the standing straw to be cut is provided at the bottom of the harvesting conveyor 4. A screw conveyor 12 is provided behind the cutting mechanism 11, and the screw conveyor 12 deflects and collects the planted straw (harvested straw) cut by the cutting mechanism 11 to a predetermined position in the left-right direction, and feeds the cut straw rearward from the predetermined position. A feeder 13, which is a conveyor for feeding and conveying the harvested straws fed out from a predetermined position toward the threshing device 5, is provided at a predetermined position of the screw conveyor 12.

The harvesting conveyor 4 is configured to swing up and down about a connection point between the machine body frame 1 and the feeder 13 as a fulcrum by operation of a hydraulic lift cylinder (not shown) provided across the machine body frame 1 and the feeder 13. The operation of the lift cylinder is controlled by switching the operating state of a control valve (not shown) that controls the flow of hydraulic oil to the lift cylinder based on the swing operation of the joystick 8 in the front-rear direction. That is, the harvesting conveyor 4 can be raised and lowered by swinging the operating lever 8 in the front-rear direction, and harvesting height adjustment or the like can be performed to change the height position of the cutting mechanism 11 relative to the standing straw.

As shown in fig. 3 to 5, a threshing chamber 14 is formed at an upper portion of the threshing device 5. The threshing chamber 14 is provided with a threshing cylinder 16 which rotates about a forward and backward support shaft 15 extending in the conveying direction of the harvested straw. A receiving net 17 is provided below the threshing cylinder 16, and the receiving net 17 is formed in a U-shape when viewed from the front so as to cover the lower portion side of the threshing cylinder 16 from below, receives the harvested straws threshed by the rotation of the threshing cylinder 16, and allows the processed objects obtained by the threshing to fall. In the threshing device 5, a straw discharge port 18 for discharging straw after threshing to the outside of the machine is formed at the rear of the receiving net 17 at the downstream end in the threshing process direction. Below the receiving net 17, a swing sorting mechanism 19 for performing a screening sorting process on the processed object leaked from the receiving net 17 is provided. A wind turbine 20 for supplying sorting wind to the processed object leaked from the receiving net 17 and the processed object in the screening and sorting process and performing wind sorting process on the processed objects is provided in front of and below the swing sorting mechanism 19. A primary collection unit 21 for collecting the processing object leaked from the front side of the swing sorting mechanism 19 is formed behind the wind turbine 20. A secondary recovery unit 22 for recovering the processing object leaked from the rear side of the swing sorting mechanism 19 is formed behind the primary recovery unit 21. A discharge port 23 is formed at the rear of the swing sorting mechanism 19 to discharge the processed object, which is not dropped from the swing sorting mechanism 19 and is conveyed to the rear end portion of the swing sorting mechanism 19, to the outside of the machine. A top plate 24 covering the upper side of the threshing cylinder 16 from above is provided openably and closably above the threshing cylinder 16, and guides the harvested straws and the threshed processed objects, which are conveyed toward the upper part of the threshing cylinder 16 as the threshing cylinder 16 rotates, toward the receiving net 17.

The threshing chamber 14 is partitioned by a receiving net 17 and a top plate 24 that cover the threshing cylinder 16. A supply port 25 for supplying the whole of the harvested straw conveyed by the feeder 13 as a processed material is formed at a position below the front end of the threshing chamber 14.

The support shaft 15 of the threshing cylinder 16 is rotatably mounted across the front wall 26 and the rear wall 27 of the threshing device 5. The threshing cylinder 16 is driven to rotate to the right as viewed from the front with the support shaft 15 as a fulcrum by power transmitted from the engine 2 via the wind turbine 20 or the like, and by this rotational driving, threshing processing is performed on the harvested straw supplied to the threshing chamber 14, so that grain singulation is promoted and the harvested straw is conveyed toward the rear of the machine body on the downstream side in the threshing processing direction.

The receiving net 17 is a concave receiving net formed in a lattice shape, receives the harvested straws supplied to the threshing chamber 14, and assists the threshing cylinder 16 in threshing the harvested straws. Specifically, the receiving net 17 receives harvested straws threshed by the rotation of the threshing cylinder 16, and while allowing the processed products such as the singulated grains or the grains with branches obtained by the threshing process or the straw chips generated by the threshing process to fall toward the swing sorting mechanism 19, prevents the threshed straws from falling toward the swing sorting mechanism 19.

The swing sorting mechanism 19 includes a screen box 29 in a frame shape in a plan view, which is driven by a cam-type driving mechanism 28 to swing in the front-rear direction. In the upper part of the screen box 29, from the front side of the screen box 29, a grain pan 30 for rough separation, a primary screen 31, and a straw walker 32 are provided in this order. In the lower part of the sieve box 29, a grain tray 33 for fine separation and a grain sieve 34 are provided in this order from the front side of the sieve box 29. On the upper part of the swing sorting mechanism 19, the sorted matter that has leaked from the receiving net 17 in a state where the singulated straw or straw chips are mixed is received by the grain pan 30, the primary screen 31, or the straw walker 32 on the upper part, and coarse sorting processing of screen-moving sorting is performed. In the lower part of the swing sorting mechanism 19, the sorted matter leaked from the primary screen 31 in a state where the singulated straw or the grain with branches is mixed is received by a grain tray 33 or a grain screen 34 in the lower part, and fine sorting processing of screen-moving sorting is performed. As a result, the sorted treated product is sorted into single grain as a primary product, a mixture of branched grain and straw chips as a secondary product, and dust such as straw chips as a tertiary product.

The wind turbine 20 is driven to rotate about the support shaft 20A thereof by the power from the engine 2 transmitted through the belt-type transmission mechanism 35, thereby generating the separation wind. The sorted air is supplied to the sorted processed matter leaked from the receiving net 17 or the sorted processed matter sorted by the swing sorting mechanism 19 through the three air passages R1 to R3, whereby the straw chips having a low specific gravity are blown out from the sorted processed matter and conveyed toward the discharge port 23 on the downstream side in the threshing process direction.

The primary recovery unit 21 recovers, as a primary product, the singulated grains that have leaked through the grain sieve 34 of the oscillating separation mechanism 19 in a state where dust such as chaff has been removed by the separation air from the wind turbine 20. A primary screw 36 driven by power from the engine 2 transmitted via the wind turbine 20 or the like is disposed in the left-right direction at the bottom of the primary recovery unit 21. The primary screw 36 conveys the primary objects recovered by the primary recovery unit 21 toward a raising screw 37 (see fig. 2) connected to the right end thereof.

The secondary recovery unit 22 recovers as secondary materials a mixture of branched grains or straw chips that have flowed down from the rear end of the grain sieve 34 without leaking down from the grain sieve 34 of the swing sorting mechanism 19 and a mixture of branched grains or straw chips that have leaked down from the straw walker 32 of the swing sorting mechanism 19. A secondary screw 38 driven by power from the engine 2 transmitted via the wind turbine 20 or the like is provided in the left-right direction at the bottom of the secondary recovery unit 22. The secondary screw 38 conveys the secondary objects recovered by the secondary recovery unit 22 toward a secondary return mechanism 39 (see fig. 2) connected to the right end thereof.

The raising screw 37 raises the primary material conveyed by the primary screw 36, and supplies the raised primary material to a grain box 40 (see fig. 1 and 2) provided above the bagging device 6. The secondary returning mechanism 39 includes a reprocessing unit (not shown) that performs threshing processing again on the secondary objects conveyed by the secondary screw 38, and conveys the secondary objects threshed by the reprocessing unit and returns them to the swing sorting mechanism 19 (see fig. 2 and 3).

The discharge port 23 discharges threshed straw which flows down from the straw discharge port 18 without leaking from the receiving net 17, straw chips which are sorted and conveyed to the rear of the swing sorting mechanism 19 by the sifting sorting process and the air sorting process, and the like, to the outside of the machine.

As shown in fig. 3 to 9, the threshing cylinder 16 includes a truncated cone-shaped scooping portion 41 forming a front end portion thereof, and a threshing processing portion 42 connected to a rear end of the scooping portion 41. Two spiral blades 43 are provided on the outer peripheral surface of the digging part 41, and the two spiral blades 43 dig in and convey the harvested straws supplied and conveyed to the supply port 25 by the feeder 13 to the threshing processing part 42 in the backward direction along with the rotation of the threshing cylinder 16.

The threshing processing unit 42 is constituted by the following components: a first plate (an example of a support member) 44 integrally provided in a front portion of the support shaft 15; a second plate (an example of a partition member) 45 integrally provided at a front-rear intermediate portion of the support shaft 15; a third plate (an example of a support member) 46 integrally provided at the rear end of the support shaft 15; six threshing cylinder frames (an example of a bar-shaped member) 47 made of round pipe steel or the like, which are supported in a front-rear direction posture along the support shaft 15 so as to be arranged at regular intervals in the circumferential direction of the threshing cylinder 16; and a plurality of threshing teeth 48 provided on each threshing cylinder frame 47 in a posture projecting outward of the threshing cylinder 16 from the threshing cylinder frame 47 and arranged at predetermined intervals in the front-rear direction.

That is, the threshing cylinder 16 is provided with a plurality of threshing teeth 48 protruding outward of the threshing cylinder 16 in an array at predetermined intervals in the circumferential direction and the front-rear direction of the threshing processing unit 42. In addition, as the threshing cylinder 16, the internal space S of the threshing processing unit 42 communicates with the threshing chamber 14, and the processed object is allowed to enter the internal space S. As a result, when the threshing cylinder 16 is rotated, while the processed objects around it and the processed objects entering the internal space S are agitated, the threshing process is performed on the processed objects by striking or combing them into the threshing cylinder frame 47 and the threshing teeth 48.

Further, since the internal space S of the threshing processing section 42 communicates with the threshing chamber 14, even when a large amount of harvested straws are supplied to the threshing chamber 14 as processed matter, the internal space S of the threshing processing section 42 can be effectively used as a processing space for threshing. This can avoid stagnation of the treatment substance in the treatment space and saturation of the treatment space. As a result, it is possible to avoid the occurrence of troubles such as the processed object leaking from the concave portion 3 without being sufficiently threshed, or the transmission system to be transferred to the threshing cylinder 16 being damaged due to an increase in the load required for the threshing process, which may be caused by the processed object staying or the saturation of the processing space.

Further, during the rotation operation of the threshing cylinder 16, not only the plurality of threshing teeth 48 but also the six threshing cylinder frames 47 forming the threshing processing section 42 of the threshing cylinder 16 function as threshing processing means acting on the processed object, and therefore, the threshing performance and the threshing efficiency can be improved.

Further, since a large amount of grains are subjected to threshing processing on the front side of the threshing cylinder 16 and are thus singulated, and then fall through the receiving net 17, the amount of processing in the front-rear middle portion of the threshing cylinder 16 is reduced, and in the front-rear middle portion, the second plate 45 partitioning the front-rear portion of the internal space S of the threshing cylinder 16 prevents the processing in the internal space S of the threshing cylinder 16 from flowing toward the downstream side in the threshing processing direction, and guides the processing to the periphery of the threshing cylinder 16 along with the rotation of the threshing cylinder 16, so that threshing by hitting or combing the processing with the threshing teeth 48 or the like, and the dropping of singulated grains from the receiving net 17 are promoted. This prevents the occurrence of tertiary loss caused by the fact that the threshed grains or the threshed straw contained in the processed material pass through the internal space S of the threshing cylinder 16 without staying and are discharged from the straw discharge port 18 formed at the downstream end in the threshing process direction together with the threshed straw.

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 spiral blades 43 together with the harvested straw raked and conveyed by the raking part 41 smoothly flows around the threshing cylinder 16 or in the internal space S of the threshing processing part 42. This prevents the straw chips and the like generated by the threshing process from flowing out from the supply port 25 to the feeder 13, and the processed material can be more quickly conveyed toward the downstream 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 communicates an output port (not shown) for outputting the collected straw formed in a harvesting unit of the harvesting conveyor 4 equipped with the cutting mechanism 11, the screw conveyor 12, and the like with the supply port 25, so that dust such as straw chips generated by the harvesting process or the recovery process in the harvesting unit flows into the periphery of the threshing cylinder 16 or the internal space S of the threshing unit 42 from the output port of the harvesting unit via the internal space of the feeder 13 and the supply port 25 together with the outside air by the suction action generated by the rotation of the screw blade 43 during the rotation operation of the threshing cylinder 16. As a result, adhesion and accumulation of straw chips and the like or flying in the harvesting and collecting part can be suppressed, and poor transportation of harvested straw due to the adhesion and accumulation, and a reduction in working environment and visibility due to the flying can be suppressed.

Each of the plates 44 to 46 is circular about the support shaft 15, and a threshing cylinder frame 47 is bolted to the outer peripheral side thereof at a position equidistant from the support shaft 15. That is, six threshing cylinder frames 47 are provided on the outer peripheral side of each of the plates 44 to 46 in a state of being arranged at a constant interval in the circumferential direction, and the cylinder diameter of the threshing cylinder 16 is increased. This prevents the harvested straw from being wound around the threshing cylinder 16.

Each threshing cylinder frame 47 is bolted to each plate 44 to 46, and can be changed in 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, and the front-rear directions of adjacent threshing cylinders 47 are opposite to each other.

Each threshing cylinder frame 47 is provided with a plurality of mounting holes 47A, 47B capable of mounting threshing teeth 48, which are arranged at a constant pitch P in the front-rear direction thereof, and which are in a state where a distance L1 from the front end of the threshing cylinder frame 47 to the center of the mounting hole 47A at the forefront and a distance L2 from the rear end of the threshing cylinder frame 47 to the center of the mounting hole 47A at the rearmost are different by half a pitch (= 1/2P).

The threshing cylinder frames 47 are connected and supported to the plates 44 to 46 in a state where the front-back directions of the adjacent frames are opposite to each other. Thus, while the same configuration is adopted as the six threshing cylinder frames 47, the threshing teeth 48 provided on the threshing cylinder frames 47 can be positioned in a state where the threshing teeth 48 of adjacent threshing cylinder frames 47 are shifted by half a pitch in the front-rear direction. As a result, the striking interval of the threshing teeth 48 against the processed object can be reduced without reducing the interval between the adjacent threshing teeth 48.

That is, the threshing cylinder frames 47 have the same structure, so that cost reduction is achieved, clogging of the processed object due to entanglement of the straw in the processed object with respect to the threshing teeth 48, which is likely to occur as the distance between adjacent threshing teeth 48 is smaller, is effectively prevented, and the threshing performance can be improved by increasing the number of times the threshing teeth 48 hit the processed object.

Further, by providing each threshing cylinder frame 47 so as to be capable of changing the orientation between the normal orientation and the reversed orientation, when the wear of the threshing teeth 48 located on the upstream side in the threshing processing direction, which is relatively easily worn due to a large amount of processed material, becomes more significant during long-term use, the orientation of each threshing cylinder frame 47 is changed so that the positions of the plurality of threshing teeth 48 provided in each threshing cylinder frame 47 can be changed at once to the state in which the threshing teeth 48 on the upstream side in the threshing processing direction, which are relatively easily worn, and the threshing teeth 48 on the downstream side in the threshing processing direction, which are not easily worn, are exchanged. This makes it possible to effectively use the threshing teeth 48 on the downstream side in the threshing process direction, which are less worn, as the threshing teeth 48 on the upstream side in the threshing process direction, which have a large amount of processed material.

Of the plurality of attachment holes 47A, 47B, four (two in the front and rear) attachment holes 47A located at both front and rear end portions of each threshing cylinder frame 47 are formed to have a smaller diameter than the attachment hole 47B located at the middle portion.

Among the threshing teeth 48, the threshing teeth 48A attached by the small-diameter attachment holes 47A are formed of a stepped round bar steel material having small-diameter portions 48A inserted through the attachment holes 47A, and are detachably nut-fixed to the threshing cylinder frame 47 so that the center thereof is positioned on a line passing through the center of the support shaft 15 and the center of the threshing cylinder frame 47.

The threshing teeth 48B attached by the attachment holes 47B of the intermediate portion are made of a round bar steel material having no step, and are welded to the threshing cylinder frame 47 in a non-detachable manner so that the center thereof is positioned on a line passing through the center of the support shaft 15 and the center of the threshing cylinder frame 47.

That is, since the threshing teeth 48A located at both front and rear end portions of the threshing processing section 42 can be attached and detached, when the threshing teeth 48A are worn significantly over a long period of use even when the orientation of the threshing cylinder frame 47 is changed, they can be easily replaced with new threshing teeth 48A.

Further, as shown in fig. 10, if the threshing teeth 48A located at the rear end of the threshing cylinder 16 are provided in a state of being spaced apart from each other on the downstream side in the threshing direction where the amount of straw to be threshed is large, the interval between the threshing teeth 48A at the rear end of the threshing cylinder becomes large, and the retention of the threshed straw due to the hooking of the threshing teeth 48A to the rear end of the threshing cylinder can be effectively suppressed. As a result, the discharge of the threshed straw from the straw discharge port 18 can be promoted.

As shown in fig. 3 to 5, 11 (a), (B) and 12, the top plate 24 is integrally provided with a curved portion 24A curved substantially along the rotation locus K of the distal end of the threshing teeth, semicircular vertical wall portions 24B located at both front and rear ends of the curved portion 24A, a linear side edge portion 24C located on the left and right of the curved portion 24A, and the like. The top plate 24 is configured to be capable of performing an opening/closing swing operation between a closed position in which the upper side of the threshing cylinder 16 is covered from above and an open position in which the upper side of the threshing cylinder 16 is opened, with a plurality of hinges 24D provided in the left side edge portion 24C thereof as fulcrums. The right side edge portion 24C is provided with a plurality of bolts 24E for fixing the top plate 24 in a closed state.

The curved portion 24A is formed to be curved so as to smoothly guide the processed object, which is conveyed toward the upper portion of the threshing cylinder 16 in accordance with the rotation of the threshing cylinder 16, by the receiving net 17 whose inner surface is directed downward. A plurality of dust sending valves 49 are detachably fixed to the inner surface of the curved portion 24A at predetermined intervals in the front-rear direction, and the dust sending valves 49 guide the processed objects conveyed to the upper portion of the threshing chamber 14 toward the downstream side in the threshing process direction in accordance with the rotation operation of the threshing cylinder 16. Among the plurality of dust sending valves 49, the foremost dust sending valve 49A is formed in an arc shape from the front vertical wall portion 24B to the left side edge portion 24C, and the other dust sending valves 49B are formed in an arc shape straddling the left and right side edge portions 24C.

That is, by providing the curved portion 24A on the top plate 24, the processed matter that is raked up and conveyed to the upper portion of the threshing chamber 14 by the plurality of threshing teeth 48 and the like with the rotation of the threshing cylinder 16 can be smoothly guided toward the receiving net 17 on the downstream side in the threshing process direction along the inner surface of the curved portion 24A or the dust sending valve 49. Further, by forming each dust sending valve 49 in a long arc shape that reaches the left side edge portion 24C or the right and left side edge portions 24C, the guiding action of each dust sending valve 49A on the processed matter that is conveyed to the upper portion of the threshing chamber 14 as the threshing cylinder 16 rotates can be effectively improved. As a result, the threshing teeth 48 can be formed into a shape having a function of conveying the processed object, and can be formed into a shape dedicated for threshing suitable for striking or combing the processed object, and the processed object can be conveyed and guided well toward the downstream side in the threshing process direction.

A joint member 50 made of steel plate is detachably bolted to the left and right side edge portions 24C, and the joint member 50 is formed by bending to have an inner surface of the tandem bending portion 24A and a guide surface 50a of an inner surface of the receiving net 17. Since the joint member 50, which is positioned at the joint between the receiving net 17 and the top plate 24 and is in strong contact with the treatment object, is detachably configured, when the joint member 50 is worn significantly by contact with the treatment object, only the joint member 50 can be replaced easily. That is, the wear of the seam part 50 can be appropriately dealt with without causing trouble and economic disadvantage that the entire top plate 24 is replaced together with the worn seam part 50, for example, in the case where the seam part 50 is welded to the top plate 24 in an unreleasable manner.

Further, a small gap is provided between the tip of each threshing tooth 48 and the lower edge of each dust sending valve 49 so that the dust sending valve 49 can guide the processed object well. Further, between the tip of each threshing tooth 48 and the inner surface of the receiving net 17, a gap larger than a gap set between the tip of each threshing tooth 48 and the lower edge of each dust sending valve 49 is set in order to promote the leakage of the singulated grains from the receiving net 17.

As shown in fig. 3, 4, 6 to 8, and 10, two support plates 41A are spirally welded to the outer peripheral surface of the digging part 41 of the threshing cylinder 16. The back surfaces of the support plates 41A are detachably bolted with the corresponding spiral blades 43, and the outer edge sides thereof protrude outward beyond the outer edge of the corresponding support plate 41A.

That is, in the threshing cylinder 16, the harvested straw fed and conveyed to the supply port 25 by the feeder 13 is raked rearward along with the rotation of the threshing cylinder, so that the two helical blades 43 come into contact with the harvested straw strongly and abrasion due to the contact is likely to occur, and the two helical blades 43 are detachably attached to the raking part 41 of the threshing cylinder 16, whereby when the helical blades 43 are worn significantly over a long period of use, only the helical blades 43 can be replaced easily. As a result, for example, in the case where the screw blade 43 is non-detachably welded to the scooping portion 41, trouble or economical disadvantage that the scooping portion 41 is replaced together with the worn screw blade 43 does not occur, and the disposal against the wear of the screw blade 43 can be appropriately performed.

Each support plate 41A is reinforced by a plurality of reinforcing ribs 41B welded across the front surfaces thereof and the outer peripheral surface of the recessed portion 41.

As shown in fig. 3, 4, 6, 13, and 14, in the threshing device 5, a conveyance auxiliary guide 51 is provided between the front wall 26 and the receiving net 17, and the conveyance auxiliary guide 51 receives the harvested straw supplied and conveyed to the supply port 25 by the feeder 13 and assists the raking-in conveyance of the harvested straw by the two spiral blades 43. The conveyance auxiliary guide 51 is constituted by a pair of left and right guide members 51A, 51B that cover the lower portion side of the insertion portion 41 from below and are bolted together in a substantially U-shape in front view. The left and right guide members 51A and 51B are configured by welding a stainless steel second plate 51B that extends from the front wall 26 of the threshing device 5 to the guide surface of the receiving net 17 to a stainless steel first plate 51A that is detachably bolted to a pair of left and right support frames 52 provided in the front and rear of the front wall 26 of the threshing device 5 and in the upper part of the threshing device 5.

That is, in the threshing device 5, since the raking and conveyance of the harvested straw by the two spiral blades 43 are assisted, the conveyance auxiliary guide 51 is in strong contact with the harvested straw and further abrasion due to the contact is likely to occur, the conveyance auxiliary guide 51 is detachably provided, and the left and right divided structure is constituted by the left and right guide members 51A and 51B on the left and right sides in the rotation direction of the threshing cylinder 16, respectively, which are positioned on the upstream side in the rotation direction of the threshing cylinder 16, whereby it is possible to easily replace only the conveyance auxiliary guide 53 when the entire conveyance auxiliary guide 51 is significantly abraded due to long-term use. In addition, when the guide members 51A and 51B on either the left or right side of the conveyance auxiliary guide 51 are worn significantly due to long-term use, only the guide members 51A and 51B that have worn significantly can be replaced. As a result, for example, in the case where the conveyance auxiliary guide 51 is welded to the receiving net 17, the left and right support frames 52, or the like in an undetachable manner, there is no trouble or economic disadvantage that the receiving net 17 or the left and right support frames 52 must be replaced together with the conveyance auxiliary guide 51, or the entire conveyance auxiliary guide 51 must be replaced even when one of the left and right sides of the conveyance auxiliary guide 51 is significantly worn, as in the case where the conveyance auxiliary guide 51 is configured in an inseparable manner, and it is possible to appropriately perform the disposal against the wear of the conveyance auxiliary guide 51.

Further, since the conveyance auxiliary guide 51 is a high-strength stainless steel member having high corrosion resistance, the frequency of replacement due to wear can be reduced.

As shown in fig. 3, 5, 6 and 15, the receiving net 17 is composed of four receiving net members 53 formed in the same shape, and detachably bolted to the left and right support frames 52. Each receiving net member 53 is provided with a base frame 53A having a rectangular skeleton. A plurality of vertical bars 53B made of a strip steel plate are arranged in the frame of the base frame 53A in the forward and backward directions with a certain interval in the circumferential direction of the threshing cylinder 16. A plurality of first horizontal bars 53C made of a strip-shaped steel plate curved in an arc shape are arranged in the left-right direction at a predetermined interval in the front-rear direction as the pivot axis direction of the threshing cylinder 16. Further, between the adjacent first horizontal bars 53C, a plurality of second horizontal bars 53D made of piano wire rods curved in an arc shape are arranged in the left-right direction at regular intervals in the front-rear direction. The arrangement intervals of the bars 53B to 53D are set so that meshes formed in the base frame 53A are rectangular in shape, the length of which in the circumferential direction of the threshing cylinder 16 is longer than the length of which in the front-rear direction.

That is, in consideration of the fact that, during the threshing process in which the threshing cylinder 16 is driven to rotate, the singulated grains and the like obtained by the threshing process on the harvested straws flow in the rotation direction of the threshing cylinder 16 as the threshing cylinder rotates, the receiving net 17 is configured such that the mesh thereof has a horizontally long rectangular shape that is long in the rotation direction of the threshing cylinder 16. Thus, compared to the case where the receiving net 17 is formed in a vertically long rectangular shape with meshes that are long in the threshing processing direction (front-rear direction) of the threshing cylinder 16, the singulated grains and the like are more likely to leak down from the front side of the receiving net 17. As a result, the occurrence of peeled grains due to the suppression of the leakage of the singulated grains from the front side of the receiving net 17 can be effectively suppressed. Further, by forming the receiving net members 53 in the same shape, productivity and assemblability of the receiving net 17 can be improved.

As shown in fig. 3 and 16, the primary screen 31 for rough separation is composed of a single separation plate 54, and the separation plate 54 is bolted to the screen box 29 in an inclined posture that rises rearward with the position located upward toward the downstream side in the separation direction.

On the front side of the sorting plate 54 (about 1/3 area of the front side with respect to the entire sorting plate 54), a plurality of rectangular drain holes 54A are arranged in a staggered pattern in which the drain holes 54A in the rear row are positioned between the drain holes 54A in the front row when viewed in plan. On the rear side of the sorting plate 54 (about 2/3 area on the rear side with respect to the entire sorting plate 54), a plurality of rectangular dropping holes 54B, 54C of the sorting pieces 54a, 54B in plan view are formed in a staggered pattern in which the dropping holes 54B, 54C in the rear row are positioned between the dropping holes 54B, 54C in the front row.

Of the sorting pieces 54a and 54b, the sorting piece 54a positioned at the left and right center sides of the sorting plate 54 is punched to have a scaly shape that is narrower and is positioned upward toward the downstream side in the sorting direction. The sorting pieces 54b positioned at the left and right ends of the sorting plate 54 are punched out into a rectangle having a size shorter than that of the sorting piece 54a at the left and right center sides, and are located upward toward the downstream side in the sorting direction.

That is, since the primary screen 31 for rough separation is configured by the single separation plate 54, the configuration can be simplified and the cost can be reduced as compared with, for example, a case where the primary screen 31 is configured by arranging a plurality of screen lips (チャフシープ) made of strip steel plates so as to be spaced apart from each other at a constant interval in the front-rear direction.

Further, by forming the under-drain holes 54A having no sorting pieces 54A and 54b on the front side of the primary screen 31 to which the sorted product having a high content of the singulated grains is supplied, the amount of the singulated grains that are leaked from the grain tray 33 or the grain screen 34 on the lower side of the front side of the primary screen 31 increases. As a result, the recovery rate of the singulated grains in the primary recovery unit 21 located below the grain tray 33 or the grain sieve 34 can be improved.

Further, by forming the drain holes 54B and 54C having the sorting pieces 54a and 54B in a staggered manner in the front, rear, left, and right directions on the rear side of the primary screen 31, the sorted matter on the primary screen 31 is uniformly distributed in the screen-moving sorting process without being offset in the left-right direction. This can promote the leakage of the singulated grains from the respective leakage holes 54B and 54C.

Further, by providing the primary screen 31 in an inclined posture that is raised backward, the force with which the primary screen 31 pushes the sorted processed product upward on the upstream side in the sorting processing direction in the screen-moving sorting processing becomes larger than in the case where the primary screen 31 is provided in a horizontal posture. Therefore, in the sieving separation process, the conveyance of the separated products toward the downstream side in the separation direction is suppressed, the vertical movement of the separated products is intensified, and the separation of the separated products by the difference in specific gravity can be performed more efficiently, so that the leakage of grains having a high specific gravity from the respective leakage holes 54B and 54C is promoted, and the occurrence of the three-time loss of discharging the separated grains from the discharge port 23 to the outside of the machine can be effectively suppressed, and as a result, the grain recovery efficiency can be improved.

Further, by forming the sorting pieces 54b at the left and right ends of the scalping screen 31 to be shorter than the sorting pieces 54a at the left and right center sides, it is possible to promote the grains and the like to be easily dropped from the dropping holes 54C at the left and right ends of the scalping screen 31 where the sorting processing object is easily deposited. As a result, a decrease in the sorting efficiency due to accumulation of the sorted products on both left and right ends of the primary screen 31 can be avoided.

The proportions of the under-drain holes 54A without the classification pieces 54A and 54B and the under- drain holes 54B and 54C with the classification pieces 54A and 54B formed in the primary screen 31 can be variously changed according to the kind of grain to be classified.

Further, a plurality of the drain holes 54C may be formed in a staggered arrangement in which the drain holes 54C in the rear row are positioned between the drain holes 54C in the front row of the sorting plate 54, and the drain holes 54C may be formed as rectangular sorting pieces 54b having a short size and a rectangular shape in a plan view.

As shown in fig. 3, the classifying air passing through the upper air passage R1 of the classifying air from the wind turbine 20 is set to flow toward the second plate 45 of the threshing cylinder 16 through the air passage R4 formed in the sieve box 29. This makes it possible to wind-convey the processed object, which is prevented from flowing downstream in the threshing process direction by the second plate 45, toward the periphery of the threshing cylinder 16. As a result, the accumulation of the processed object in the front portion of the second plate 45 can be avoided, which may hinder the threshing process.

As shown in fig. 3 and 6, the threshing teeth 48A at the rear end of the threshing cylinder 16 are located behind the rear end of the receiving net 17 and face the straw discharge port 18. That is, since the receiving net 17 is not present at the rear end of the threshing cylinder 16, a large space is formed around the receiving net. Thus, even if threshing straw is wound around the threshing teeth 48A at the rear end of the threshing cylinder, the threshing straw is pulled out from the ends of the threshing teeth 48A by the centrifugal force generated along with the rotation of the threshing cylinder 16. As a result, retention of threshed straw due to hooking of threshed straw to the threshing teeth 48A at the rear end of the threshing cylinder 16 can be effectively suppressed, and discharge of threshed straw from the straw discharge port 18 can be promoted.

Next, the split case of the transmission and the ventilation (break) device provided in the split case will be described with reference to fig. 17 to 20.

[ integral constitution of division case ]

Fig. 17 shows a transmission case 101 used for a full-feed combine harvester as an example of a division case to which the ventilator of the present invention is applied.

The transmission case 101 is formed by combining a pair of left and right divided case units 102 and 102, and is bolted together with a seal 103 interposed between mating surfaces 120 of the divided portions shown by a dividing line y in the figure.

The transmission 101 is connected to and supports a hydrostatic continuously variable transmission (HST) 105 constituted by another transmission on the upper side thereof, and is supported on the lower side thereof by an axle 106.

The hydrostatic continuously variable transmission 105 supports the transmission case 101 at the upper end of the transmission case 101 by inserting an input shaft 150 integrated with a pump drive shaft into a shaft support portion 121 extending above one of the left and right split case units 102, 102. The power of the traveling system, which is branched from the power of the working system, is transmitted from the engine (not shown) to the input pulley 151 provided on the input shaft 150 in a belt transmission manner.

An output shaft 152 integrated with a motor shaft of the hydrostatic continuously variable transmission 105 is inserted into an upper portion of the transmission 101, and power shifted by the hydrostatic continuously variable transmission 105 is input to a transmission mechanism in the transmission 101. The power transmitted from the hydrostatic continuously variable transmission 105 is shifted in two high and low gears by a sub-transmission mechanism 113 as a transmission mechanism provided in the transmission 101, and then branched and transmitted to the left and right axles 106 via the left and right side clutches 114 to be output to the left and right crawler traveling devices.

Fig. 17 and 18 show an outline of a transmission mechanism provided in the transmission 101.

That is, the first shaft 161, the intermediate shaft 162, the second shaft 163, and the pair of left and right axles 106 are supported transversely in the transmission 101, and the sub-transmission mechanism 113 capable of shifting two gears in high and low through a gear shift operation is provided across the first shaft 161 and the intermediate shaft 162.

A sun gear CG formed by integrating a large-diameter speed change gear G5 engageable with the small-diameter gear G3 and a small-diameter speed change gear G6 engageable with the large-diameter gear G4 is loosely fitted and supported in the left and right central portions of the intermediate shaft 162.

The "low speed" is exhibited by selectively engaging the small diameter gear G3 with the large diameter transmission gear G5 by moving the shift gear SG rightward in the figure, the "high speed" is exhibited by selectively engaging the large diameter gear G4 with the small diameter transmission gear G6 by moving the shift gear SG leftward in the figure, and the "neutral" is exhibited by moving the shift gear SG to a neutral position where it does not engage with the sun gear CG.

At one shaft supporting portion of the first shaft 161 equipped with the shift gear SG, a parking brake PB is equipped. The parking brake PB stops the rotation of the shift gear SG and fixes the transmission downstream side.

A clutch gear G7 constituting the side clutch 114 is loosely fitted and supported on the left and right of the intermediate shaft 162 so as to be slidable in the axial direction, and a pair of output gears G8 meshing with the clutch gears G7 are loosely fitted and supported on the second shaft 163.

The clutch gear G7 is slid inward to be engaged with the internal gear G9 formed at the center of the sun gear CG, thereby bringing the clutch into a "clutch engaged" state, and the clutch gear G7 is slid outward to be disengaged from the internal gear G9, thereby bringing the clutch disengaged state into a "clutch disengaged" state. The clutch gears G7 are always slidingly biased in the "clutch engaged" direction by the spring 168 externally fitted to the intermediate shaft 162. The clutch gear G7 is formed to have a large width, and is always engaged with the output gear G8 in any one of the states of "clutch on" and "clutch off".

Each of the output gears G8 is integrally connected to an intermediate small-diameter gear G10 loosely fitted and supported on the second shaft 163, and each of the intermediate small-diameter gears G10 meshes with a large-diameter reduction gear G11 fixedly attached to the inner end portion of each axle 106, so that the power extracted from each of the output gears G8 is transmitted to the left and right axles 106 while being reduced in speed.

Side brakes SB that act on the clutch gear G7 are provided near the left and right ends of the intermediate shaft 162. The side brake SB is configured by a multi-plate friction brake in which a friction plate 175 engaging with the outer periphery of the boss portion 169 and a friction plate 177 engaging with the inner periphery of the fixed bearing housing 176 are alternately stacked in the axial direction, and the clutch gear G7 is further slid outward beyond the "clutch off" position, and the operating plate 171 is pressed against the stacked friction plates 175 and 177 to apply friction braking to the clutch gear G7.

[ construction of Ventilation device ]

As shown in the explanatory diagrams of fig. 19 and 20, a breather device 104 according to the present invention is provided in an upper portion of a transmission case 101 incorporating the transmission mechanism.

An outer wall 122 on the upper side of each of the left and right split box units 102 and a partition wall 123 are provided, and the partition wall 123 forms an expansion chamber 140 together with the outer wall 122 by utilizing an empty space generated between the outer wall 122 and a transmission member (i.e., the output shaft 152 and the first shaft 161, and gears disposed around these shafts) disposed in the vicinity thereof.

The extension chamber 140 provided in each of the split case units 102 is open on the mating surface 120 side of the transmission case 101, and is surrounded by the partition wall 123 at other portions so as to constitute small chambers partitioned to be sealed from the oil storage space 110 in the transmission case 101, that is, a space in which the various transmission mechanisms and the like are incorporated in a state of being immersed in the lubricating oil.

The extension chamber 140 provided in each of the right and left split case units 102 is partitioned into right and left sides by a seal 103 provided on the mating surface 120 of the transmission case 101, and a small communication port 141 for ventilation is formed by a cutout portion in a portion facing the mating surface 120 on the bottom side of the first extension chamber 140a located on one side. A lateral discharge tube is provided as a vent hole 142 that allows communication with the outside air in the other second extension chamber 140b of the split box unit 102 provided on the opposite side across the seal 103.

Further, in the seal 103 located between the expansion chambers 140a and 140b, a communication hole 130 is formed near the outer wall 120 of the transmission case 101, and the communication hole 130 allows air to flow from the first expansion chamber 140a communicating with the oil storage space 110 to the second expansion chamber 140b side having the air vent 142.

That is, the ventilator 104 of the present invention is configured by the expansion chambers 140a and 140b provided in the left and right divided box units 102, respectively, and the seal 103 positioned between the expansion chambers 140a and 140 b.

The ventilator 104 configured as described above is configured to supply and discharge air as indicated by arrows in fig. 19.

That is, when the pressure of the gas on the lower oil storage space 110 side increases due to the rise of the oil temperature, the inclination of the machine body, or the like, the gas is pushed into the first extension chamber 140a above it through the small communication port 141.

At this time, in the upper first extension chamber 140a, the pressure is reduced in a space having a capacity larger than that of the small communication port 141, so that oil can be removed to some extent from the inflow gas and returned from the small communication port 141 to the oil storing space 110.

When the internal pressure of the first expansion chamber 140a increases, the gas flows into the second expansion chamber 140b on the opposite side through the communication hole 130 of the seal 103, is reduced in pressure through a large space, further reduces the oil content, and then flows out through the vent hole 142.

Although a passage for returning the oil generated by gas-liquid separation in the second extension chamber 140b to the oil reservoir space 110 is not formed, most of the oil is removed in the first extension chamber 140a, and therefore, there is very little possibility that a large amount of oil is stored in the second extension chamber 140 b.

When a large amount of oil is stored, the vent hole 142 may be opened to perform suction and discharge from the outside, or the entire transmission 101 may be maintained and the tank may be disassembled to discharge.

A vent pipe 143 protruding upward and bent in a semicircular shape is connected to the discharge tube constituting the vent hole 142. The vent pipe 143 protruding and bent in this way is connected to prevent water from entering the transmission case 101 from the outside when the body is cleaned.

As described above, the ventilation device 104 is provided in the split transmission 101 formed by joining the plurality of split case units 102, 102 to each other by the mating surface 120, the split case units 102, 102 on both sides of the mating surface 120 are integrally formed with the extension chambers 140 (140 a, 140 b) each formed of a small chamber open to the mating surface 120 side, one of the extension chambers 140a is formed with the small communication port 141 communicating with the oil reservoir 110 in the split case, and the other extension chamber 140b is provided with the ventilation port 142. The fitting surface 120 is provided with a seal 103 to partition the expansion chambers 140a and 140b on both sides of the fitting surface 120, and the seal 103 is provided with a communication hole 130 to allow air to flow from the expansion chamber 140a communicating with the oil storage space 110 toward the expansion chamber 140b having the vent hole 142.

According to the above configuration, when the split transmission 101 is configured, the breather 104 can be configured by the seal 103 which must be attached to the case mating surface 120, simply by integrally forming the extension chamber 140 (140 a, 140 b) therein.

Therefore, the ventilator having a labyrinth structure or an expansion chamber can be configured without adding a special member as the ventilator, and cost reduction can be achieved with a simple configuration.

The extension chamber 140 (140 a, 140 b) is provided in a space between the outer wall 122 formed on the upper side of each of the split box units 102 and the transmission members (i.e., the output shaft 152 and the first shaft 161, and gears disposed around these shafts) disposed in the vicinity thereof.

According to the above configuration, the expansion chamber 140 (140 a, 140 b) is formed by a so-called empty space between the outer wall 122 on the upper side of each split case unit 102 and the power transmission member disposed in the vicinity thereof, and thus the highly functional ventilator 104 can be configured compactly without changing the shape or size of the entire transmission case 101.

[ other embodiments ]

Although one preferred embodiment of the threshing device according to the present invention has been described above with reference to the drawings, the present invention is not limited to the configuration of this embodiment. For example, various modifications as listed below can be made.

(1) Instead of the illustrated all-feed type combine-harvester (hole head harvesting type combine-harvester), the threshing device may be mounted on a half-feed type combine-harvester (hole head harvesting type combine-harvester) that supplies only the ear tip side of the harvested straw to the threshing chamber 14.

(2) The threshing cylinder 16 may not have the raking part 41, or the raking part 41 may have the full-length comb teeth or threshing teeth 48 instead of the spiral teeth 43.

(3) As the threshing cylinders 16, round bar steel, square tube steel, angle bar, or groove bar can be used for each threshing cylinder frame (bar member) 47.

(4) The threshing cylinder 16 may be provided with a number of threshing cylinder frames (rod members) 47 that can be variously changed, and for example, eight threshing cylinder frames 47 may be provided.

(5) In the threshing cylinder 16, a plurality of threshing cylinder frames (rod-shaped members) 47 may be fixed to the plates 44 to 46 so that the orientation thereof cannot be changed.

(6) All the threshing teeth 48 provided in the rod 47 may be welded and fixed to the rod 47, or may be detachably bolted to the rod 47.

(7) All or a part of the threshing teeth 48 provided in the rod-shaped member 47 may be formed in a blade shape having a guide surface for guiding the threshing processed object to the downstream side in the threshing processing direction in accordance with the rotation of the threshing cylinder 16, or may be formed in an L-shape in a curved shape so as to have a function as a guide portion for guiding the threshing processed object to the downstream side in the threshing processing direction in accordance with the rotation of the threshing cylinder 16.

(8) As the threshing teeth 48, a square bar steel material, a round pipe material, or the like, or a material bent in a U-shape or a V-shape may be used.

(9) The arrangement interval of the threshing teeth 48 can be variously changed, and for example, when the number of threshing cylinder frames (rod-like members) 47 is set to a multiple of 3, the arrangement is set so that each threshing tooth 48 is positioned so as to be shifted from the threshing teeth 48 provided in the adjacent threshing cylinder frame (rod-like member) 47 in the front-rear direction by 1/3 pitches, or when the number of threshing cylinder frames (rod-like members) 47 is set to a multiple of 4, the arrangement is set so that each threshing tooth 48 is positioned so as to be shifted from the threshing teeth 48 provided in the adjacent threshing cylinder frame (rod-like member) 47 in the front-rear direction by 1/4 pitches. Alternatively, for example, the arrangement interval of the threshing teeth 48 may be set to be different between the front and rear sides 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.

(10) The partition member 45 can be variously modified in the configuration, shape, number of equipment, and the like, and for example, the partition member 45 may be formed of a circular porous plate, or the partition member 45 may be formed of a plurality of rod-shaped extending members extending from the support shaft 15 to the rod-shaped members 47, and a ring-shaped connecting member connecting the extending end sides of the extending members. The partition member 45 may be formed in a conical shape or the like so as to be located on the downstream side of the threshing process in the rear direction with respect to the outer peripheral side thereof, and may have a function of guiding the threshing processed object to the periphery of the threshing cylinder 16, or a plurality of partition members 45 may be provided in the threshing cylinder 16.

(11) A dedicated wind generating device (e.g., a windmill) may be further provided for generating wind flowing from the upstream side in the threshing process direction with respect to the partition member 45 toward the partition member 45.

(12) All of the dust feed valves 49 or a part of the dust feed valves 49 provided in the top plate 24 may be formed to have a short length not reaching either the left or right side edge portions 24C or both the left and right side edge portions 24C of the top plate 24.

(13) The dust feed valve 49 can be configured to be movable so that the opening degree thereof can be adjusted according to the amount of threshing processing in the threshing chamber 14, thereby further improving the threshing performance and the threshing efficiency.

(14) The top plate 24 may be formed such that the curved portion 24A is curved along the rotation locus K drawn by the distal end of the threshing teeth 48. In addition, the bendable portion 24A may be replaced with a bendable portion formed by bending so as to cover the upper portion side of the threshing cylinder 16 from above.

(15) The threshing cylinder 16 may have a threshing processing unit 42 of a cylindrical type, which is constituted by: a cylindrical portion formed in a cylindrical shape; two spiral bodies provided on the outer periphery of the cylindrical portion so as to be connected to the two spiral blades 43 provided in the digging portion 41; and a plurality of threshing teeth detachably provided at the outer peripheral portion of each spiral body at predetermined intervals in a state of protruding outward.

(16) As the threshing cylinder 16, a single screw blade 43 may be detachably attached to the outer peripheral surface of the tip end portion 41, or three or more screw blades 43 may be detachably attached to the outer peripheral surface of the tip end portion 41.

(17) As the threshing cylinder 16, a plurality of support metal members to which the helical blades 43 are detachably attached may be arranged in a spiral shape on the outer peripheral surface of the leading end portion 41.

(18) The helical blade 43 may be formed by arranging a plurality of blade-like members in a spiral shape on the outer peripheral surface of the threshing cylinder tip portion 41.

(19) The conveyance auxiliary guide 51 may be configured not to be divided into left and right portions, or may be configured to be divided into three or more portions.

(20) The conveyance auxiliary guide 51 may be configured to be attachable and detachable only at a portion 51B located on the downstream side in the rotation direction of the threshing cylinder 16.

(21) As a material of the conveyance auxiliary guide 51, a steel material such as carbon steel other than stainless steel may be used.

(22) The joint member 50 may be detachably attached to the receiving net 17.

(23) In the above-described embodiment, the extension chamber 40 is provided in the space between the outer wall formed on the upper side of each split tank unit 2 and the transmission member disposed in the vicinity thereof, but the present invention is not limited thereto, and any suitable place may be selected and disposed as long as it is higher than the predetermined oil level in the oil reservoir space 10.

(24) The small communication port 41 formed in the first extension chamber 40a is not limited to the notch having one open end as in the embodiment, and may be a port having an appropriate shape such as a circular hole, and the opening position thereof may be freely set as long as it is a position at which the oil stored in the chamber can be discharged to the oil storage space 10 below.

(25) In the case where the divided box is divided into more than two parts, for example, three or more parts, the expansion chambers 40 may be formed in the parts facing the mating surfaces 20 of the divided parts, and the seal 3 with the communication hole 30 may be interposed to form the ventilation device 4 having a labyrinth structure of three or more parts.

Claims (47)

1. A threshing device of a full-feeding combine harvester, comprising a threshing cylinder which is rotationally driven with a fulcrum shaft erected along a conveying direction of harvested straws as a fulcrum to thresh the harvested straws supplied to a threshing chamber, and a top plate which covers an upper side of the threshing cylinder,

the threshing cylinder includes a plurality of threshing cylinder frames arranged in a front-rear direction along the support shaft in a state of being arranged at predetermined intervals in a circumferential direction of the threshing cylinder, and a plurality of threshing teeth arranged in a front-rear direction at predetermined intervals in each of the threshing cylinder frames so as to protrude outward from the threshing cylinder frames,

a truncated cone-shaped raking part is provided at a front end of the threshing cylinder, the raking part is provided with a helical blade which rakes and conveys the harvested straws supplied from the supply port of the threshing chamber to the rear side along with the rotation around the support shaft,

a plurality of dust feeding valves provided on an inner surface of the top plate so as to be arranged at intervals in a front-rear direction, for guiding the threshing object conveyed to an upper portion of the threshing chamber toward a downstream side in a threshing process direction in accordance with a rotation operation of the threshing cylinder,

the plurality of dust-feeding valves are provided with dust-feeding valves for a raking-in part at a position where the raking-in part is provided on the top plate, the dust-feeding valves for a raking-in part guide the harvested straws toward a downstream side in a threshing processing direction in accordance with rotational driving of the raking-in part,

the dust sending valve for the digging part is arranged in a state that the upstream part of the dust sending valve enters the part of the top plate where the digging part is arranged, and the dust sending valve is arranged in the following two parts: the part of the top plate, which is provided with the digging part, and the part of the threshing cylinder framework and the threshing teeth,

in a plan view, the interval in the front-rear direction between adjacent dust feed valves among the plurality of dust feed valves is set to be larger than the interval in the front-rear direction between adjacent threshing teeth on each threshing cylinder frame.

2. A threshing device of a full-feeding combine harvester, comprising a threshing cylinder which is rotationally driven with a fulcrum shaft erected along a conveying direction of harvested straws as a fulcrum to thresh the harvested straws supplied to a threshing chamber, and a top plate which covers an upper side of the threshing cylinder,

the threshing cylinder includes a plurality of threshing cylinder frames arranged in a front-rear direction along the support shaft in a state of being arranged at predetermined intervals in a circumferential direction of the threshing cylinder, and a plurality of threshing teeth arranged in a front-rear direction at predetermined intervals in each of the threshing cylinder frames so as to protrude outward from the threshing cylinder frames,

a truncated cone-shaped raking part is provided at a front end of the threshing cylinder, the raking part is provided with a helical blade which rakes and conveys the harvested straws supplied from the supply port of the threshing chamber to the rear side along with the rotation around the support shaft,

a plurality of dust feeding valves provided on an inner surface of the top plate so as to be arranged at intervals in a front-rear direction, for guiding the threshing object conveyed to an upper portion of the threshing chamber toward a downstream side in a threshing process direction in accordance with a rotation operation of the threshing cylinder,

the plurality of dust-feeding valves are provided with dust-feeding valves for a raking-in part at a position where the raking-in part is provided on the top plate, the dust-feeding valves for a raking-in part guide the harvested straws toward a downstream side in a threshing processing direction in accordance with rotational driving of the raking-in part,

the dust sending valve for the digging-in part is formed across the front vertical wall part and the left side edge part of the top plate,

in a plan view, the interval in the front-rear direction between adjacent dust feed valves among the plurality of dust feed valves is set to be larger than the interval in the front-rear direction between adjacent threshing teeth on each threshing cylinder frame.

3. A threshing device of a whole-feed type combine harvester according to claim 1 or 2, wherein a plurality of dust feeding valves for the raking sections are provided.

4. A threshing device of a full-feeding combine harvester, comprising a threshing cylinder which is rotationally driven with a fulcrum shaft erected along a conveying direction of harvested straws as a fulcrum to thresh the harvested straws supplied to a threshing chamber, and a top plate which covers an upper side of the threshing cylinder,

the threshing cylinder includes a plurality of threshing cylinder frames arranged in a front-rear direction along the support shaft in a state of being arranged at predetermined intervals in a circumferential direction of the threshing cylinder, and a plurality of threshing teeth arranged in a front-rear direction at predetermined intervals in each of the threshing cylinder frames so as to protrude outward from the threshing cylinder frames,

a truncated cone-shaped raking part is provided at a front end of the threshing cylinder, the raking part is provided with a helical blade which rakes and conveys the harvested straws supplied from the supply port of the threshing chamber to the rear side along with the rotation around the support shaft,

a plurality of dust feeding valves provided on an inner surface of the top plate so as to be arranged at intervals in a front-rear direction, for guiding the threshing object conveyed to an upper portion of the threshing chamber toward a downstream side in a threshing process direction in accordance with a rotation operation of the threshing cylinder,

the plurality of dust-feeding valves are provided with a plurality of dust-feeding valves for a digging-in part at a position where the digging-in part is provided on the top plate, the dust-feeding valves for the digging-in part guide the harvested straws toward the downstream side in the threshing processing direction in accordance with the rotational driving of the digging-in part,

the dust-feeding valve for the digging-in part which is the most upstream side in the threshing processing direction among the dust-feeding valves for the digging-in part is formed across the front side vertical wall part and the left side edge part of the top plate,

the other dust sending valve for the digging part arranged at the downstream side of the threshing processing direction is arranged at the following two positions in a state that the upstream side part of the other dust sending valve enters the position of the top plate where the digging part is arranged: the part of the top plate, which is provided with the digging part, and the part of the threshing cylinder framework and the threshing teeth,

in a plan view, the interval in the front-rear direction between adjacent dust feed valves among the plurality of dust feed valves is set to be larger than the interval in the front-rear direction between adjacent threshing teeth on each threshing cylinder frame.

5. The threshing device of a whole-feed type combine harvester according to any one of claims 1, 2, and 4, wherein a height of an upstream end of the screw blade in a threshing process direction in a radial direction of the threshing cylinder is higher than a height of a downstream end of the screw blade in the threshing process direction in the radial direction of the threshing cylinder.

6. The threshing device of a whole-feed combine harvester according to claim 5, wherein a distance from the support shaft to an outer periphery of the spiral blade in a radial direction of the threshing cylinder is constant from an upstream end in the threshing process direction to a downstream end in the threshing process direction.

7. The threshing device of a whole-feed type combine harvester according to any one of claims 1, 2, and 4, wherein a dust sending valve on an upstream side in a threshing processing direction among the plurality of dust sending valves is formed shorter than other dust sending valves provided on a downstream side.

8. Threshing apparatus for a whole-feed combine harvester according to any of claims 1, 2, 4, characterised in that the threshing teeth are formed in a straight line.

9. The threshing apparatus of a whole-feed type combine harvester according to any one of claims 1, 2, and 4, wherein the supporting shaft of the threshing cylinder is erected in a horizontal posture from a front end on a feed opening side of the threshing chamber to a rear end on a stalk discharge opening side.

10. The threshing apparatus of a whole-feed combine harvester according to any one of claims 1, 2, and 4, wherein a wind turbine for generating the sorting wind is provided in front of and below the swing sorting mechanism, and the sorting wind from the wind turbine performs wind sorting processing on the sorted processed products by three wind paths.

11. The threshing device of a whole-feed combine harvester according to any one of claims 1, 2, and 4, wherein an internal space communicating with the threshing chamber is formed inside the threshing cylinder, a wind turbine generating the sorting air is provided in front of and below the swing sorting mechanism, and the sorting air from the wind turbine is made to flow toward the internal space.

12. The threshing device of a whole-feed type combine harvester according to claim 11, wherein the threshed processed material flows toward a downstream side in a threshing process direction in the internal space by the classifying air.

13. The threshing device of a whole-feed combine harvester according to claim 11, wherein the external air sucked from the supply port as the screw blade rotates flows around the threshing cylinder and into the internal space, and the threshed objects flow downstream in the threshing process direction in the internal space by the external air introduced from the scooping portion.

14. The threshing device of a whole-feed type combine harvester according to any one of claims 1, 2, and 4, wherein a gap between the tip of the threshing teeth and the lower edge of the dust sending valve in the radial direction of the threshing cylinder is set smaller than a gap between the tip of the threshing teeth and an inner edge of a receiving net that covers the lower portion side of the threshing cylinder from below.

15. The threshing device of a whole feeding type combine harvester according to any one of claims 1, 2, and 4, further comprising a receiving net that covers a lower portion side of the threshing cylinder from below, wherein a mesh of the receiving net is formed in a horizontally long rectangular shape that is long in a rotation direction of the threshing cylinder.

16. The threshing device of a whole-feed combine harvester according to any one of claims 1, 2, and 4, wherein power for rotationally driving the threshing cylinder is input from a front end side of the support shaft in the conveying direction.

17. A full-feed combine harvester equipped with the threshing device according to any one of claims 1 to 16.

18. Threshing device of a whole-feed combine harvester according to claim 1,

a support plate provided in front and rear of the support shaft to support the plurality of threshing cylinder frames,

the threshing cylinder framework is made of pipe steel materials,

the threshing cylinder frame is provided with a plurality of mounting holes, the threshing teeth are inserted into the mounting holes, and the threshing cylinder frame is supported at two positions, namely a radial inner side and a radial outer side of the threshing cylinder.

19. The threshing apparatus of a whole-feed combine harvester of claim 18, wherein the mounting hole extends through the threshing cylinder frame.

20. A threshing apparatus of a full feed combine harvester according to claim 18 or 19, wherein the threshing teeth are welded to the threshing cylinder frame.

21. The threshing apparatus of a full feed combine harvester of claim 20, wherein the threshing teeth are welded radially inward of the threshing cylinder.

22. The threshing apparatus of a whole-feed combine harvester according to claim 21, wherein the threshing teeth have distal end portions projecting from the mounting holes to a radially inner side of the threshing cylinder, and a projecting portion thereof is welded and fixed to the threshing cylinder frame at the radially inner side.

23. The threshing apparatus of a full feed combine harvester of claim 20, wherein the threshing teeth are welded radially outward of the threshing cylinder.

24. A threshing apparatus for a whole feed combine harvester according to claim 18 or 19, wherein the threshing teeth are formed of round bar steel without steps.

25. A threshing apparatus of a whole-feed combine harvester according to claim 18 or 19, wherein the threshing teeth are detachably fixed to the threshing cylinder frame by nuts.

26. The threshing apparatus of a full feed combine harvester of claim 25, wherein the threshing teeth are formed from a stepped round bar of steel.

27. A threshing apparatus of a full feed combine harvester according to claim 18 or 19, wherein the center of the threshing teeth is located on a line passing through the center of the fulcrum and the center of the threshing cylinder frame.

28. The threshing apparatus of a whole-feed type combine harvester according to claim 18 or 19, wherein the threshing teeth are provided on the threshing cylinder frame in a posture cantilevered outward of the threshing cylinder.

29. The threshing apparatus of a whole-feed type combine harvester according to claim 18 or 19, wherein the plurality of threshing teeth are provided on the threshing cylinder frame in such a manner as to be arranged at a certain interval in a length direction of the threshing cylinder frame.

30. The threshing device of a whole feeding type combine harvester according to claim 29, wherein in two of the threshing cylinder frames adjacent in the rotation direction of the threshing cylinder, the threshing teeth of one threshing cylinder frame and the threshing teeth of the other threshing cylinder frame are installed at positions shifted from each other in the front-rear direction of the threshing cylinder frames.

31. A threshing apparatus of a whole-feed type combine harvester according to claim 18 or 19, wherein an inner space communicating with a threshing chamber is formed inside the threshing cylinder, and the threshing cylinder is provided with a supporting plate for partitioning the inner space forward and backward.

32. The threshing device of a whole-feed combine harvester according to claim 31, wherein the threshing device is configured to perform threshing by beating the threshing cylinder frame and the threshing teeth while stirring the processed material around the threshing cylinder and the processed material entering the internal space.

33. The threshing device of a whole-feed combine harvester according to claim 18 or 19, wherein the threshing processing unit of the threshing cylinder includes a 1 st support plate as the support plate integrally provided in a front portion of the support shaft, a 3 rd support plate as the support plate integrally provided in a rear portion of the support shaft, and a 2 nd support plate integrally provided in a front-rear intermediate portion of the support shaft.

34. A full-feed combine harvester equipped with the threshing device according to any one of claims 18 to 33.

35. A threshing structure of a full-feeding combine harvester, a threshing cylinder is provided with a truncated cone-shaped digging part forming the front end part of the threshing cylinder and a threshing processing part connected with the rear end of the digging part, the peripheral surface of the digging part is provided with a helical blade, the helical blade is used for digging and conveying the reaped straws supplied and conveyed to the digging part towards the rear part along with the rotation of the threshing cylinder,

a support plate is spirally welded to the outer peripheral surface,

the screw blade is detachably mounted on the support plate,

a plurality of dust sending valves are arranged on the top plate, the dust sending valves guide the processed objects conveyed to the upper part of the threshing chamber to the downstream side of the threshing processing direction along with the rotation of the threshing cylinder,

the plurality of dust sending valves comprise dust sending valves which span the following two parts: a part of the top plate corresponding to the position of the digging-in part and a part of the top plate corresponding to the position of the threshing processing part,

a conveying auxiliary guide member is provided below the threshing cylinder, the conveying auxiliary guide member being arranged to cover a front end portion of the threshing cylinder from below, to receive harvested straw supplied to the front end portion of the threshing cylinder for conveyance, and to assist the raking and conveying of the harvested straw by the screw blade,

the auxiliary conveying guide part is configured to be detachable,

the transportation auxiliary guide is divided into an upstream portion located on an upstream side in a rotation direction of the threshing cylinder and a downstream portion located on a downstream side in the rotation direction of the threshing cylinder, an upper end portion of the downstream portion of the transportation auxiliary guide is detachably attached to an upper surface of a support frame extending in a front-rear direction on one of left and right sides of the threshing cylinder,

an upper end portion of an upstream side portion of the conveying auxiliary guide is detachably attached to an upper surface of a support frame extending in a front-rear direction on the other of left and right side portions of the threshing cylinder.

36. The threshing structure of a whole-feed combine harvester according to claim 35, wherein a plurality of reinforcing ribs supporting the support plate are welded across a front surface and the outer peripheral surface of the support plate, and the screw blade is detachably attached to the support plate in a state of being overlapped only with a portion of the support plate on a radially outer side of the threshing cylinder.

37. The threshing structure of a whole-feed combine harvester according to claim 35, wherein the screw blade is detachably attached to a rear side surface of the support plate, and a plurality of reinforcing ribs supporting the support plate are welded across a front side surface and the outer peripheral surface of the support plate in a state of being spaced apart in a circumferential direction of the threshing cylinder.

38. The threshing structure of a whole-feed combine harvester according to claim 36, wherein the screw blade is detachably attached to a rear side surface of the support plate, and the plurality of reinforcing ribs are welded to the front side surface and the outer peripheral surface of the support plate at intervals in a circumferential direction of the threshing cylinder.

39. The threshing structure of a whole-feed combine harvester according to any one of claims 36 to 38, wherein the screw blades are detachably attached to the support plate by being fastened with fasteners at a plurality of positions in the circumferential direction of the threshing cylinder.

40. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein a front side surface of the support plate is welded and fixed to the outer peripheral surface, a rear side surface of the support plate is welded and fixed to the outer peripheral surface, and the reinforcing ribs are welded and fixed to the front side surface and the outer peripheral surface of the support plate.

41. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein the screw blade is detachably attached to a rear side surface of the support plate by fastening a bolt, and the bolt is directly screwed to the screw blade in a state of penetrating the support plate from a front side of the support plate.

42. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein the screw blade is detachably mounted on the support plate by fastening the screw blade to an outer peripheral side portion of the support plate at a plurality of positions in a radial direction of the threshing cylinder.

43. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein the support plate is formed in a spiral shape from an upstream side portion to a downstream side portion of the spiral blade, and the support plate is formed so that a rising height gradually decreases from the upstream side toward the downstream side.

44. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein the threshing processing unit includes a plurality of threshing teeth formed of a bar member that protrudes outward in a radial direction of the threshing cylinder, the plurality of dust feed valves include a plurality of other dust feed valves that are provided at positions on the top plate that correspond to positions of the threshing processing unit, and the plurality of other dust feed valves are disposed across a front end portion of the front-rear range and a rear end portion of the front-rear range in a front-rear range in which the plurality of threshing teeth are present in the threshing processing unit.

45. The threshing structure of a whole-feed type combine harvester according to any one of claims 36 to 38, wherein a lower end portion of an upstream side portion of the transportation auxiliary guide and a lower end portion of a downstream side portion of the transportation auxiliary guide are detachably coupled and fixed in a butted state.

46. The threshing structure of a whole-feed type combine harvester according to claim 45, wherein a coupling portion that couples a lower end portion of an upstream side portion of the transportation auxiliary guide and a lower end portion of a downstream side portion of the transportation auxiliary guide is formed on a back surface side of a side opposite to a side on which the threshing cylinder is located.

47. The threshing structure of a whole-feed combine harvester according to any one of claims 36 to 38, wherein a receiving net is provided below the threshing cylinder so as to cover the threshing cylinder from below, the receiving net receives harvested straw threshed as the threshing cylinder rotates and allows processed matter obtained by the threshing process to fall, the top plate is provided above the threshing cylinder so as to cover the threshing cylinder from above, the top plate guides the harvested straw and the processed matter that are conveyed toward an upper portion of the threshing cylinder as the threshing cylinder rotates to the receiving net, and seam members formed so as to have guide surfaces connecting inner surfaces thereof in series are detachably provided on the top plate between left and right end portions of the receiving net and the top plate, the top plate is configured to be capable of performing an opening/closing swing operation between a closed position in which an upper portion of the threshing cylinder is covered from above and an open position in which the upper portion of the threshing cylinder is opened, using hinges provided at left and right end portions of the top plate on the lateral outer sides of the joint members on one of the left and right sides as fulcrums, and bolts for fixing the top plate at the closed position are provided at the left and right end portions of the top plate on the lateral outer sides of the joint members on the other of the left and right sides.

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