Combine harvester

Abstract

The present invention provides a combine harvester equipped with a cylinder, which is capable of improving the efficiency of threshing without providing a new structure or reducing the design freedom, and preventing the occurrence of threshing residues due to poor threshing, with respect to the processed material processed by the cylinder equipped with a delivery wing. In the cylinder (40), a link portion (74) for linking a wing base (29a) of a delivery wing piece (29) serving as a base of the delivery wing (75) and a shielding member (56) is provided, and the link portion (74) has a release structure (73) provided with a strike surface, i.e., an inclined surface (65a, 65b) having a slope expanding toward the outer side in the circumferential direction and having a radial depth (D) greater than the radial thickness (ha) of the support rod (55), and the processed material moving between adjacent support rods (55) is pushed out and released to the outer side in the radial direction by the inclined surface (65a, 65b).

Description

Technical Field

[0001] The present invention relates to a combine harvester comprising: a shielding member that covers the area around the rotating shaft of a threshing cylinder rotatably supported within a threshing chamber, and delineates the interior space together with the front and rear end panels of the threshing cylinder; support rods that extend parallel to the axial direction of the rotating shaft on the shielding member, with rod-shaped threshing teeth protruding radially outward from their upper surfaces; and conveying wings disposed between adjacent support rods that convey processed ears of grain, threshed material, etc. (hereinafter referred to as "processed material") from the upstream conveying side of the threshing cylinder toward the downstream conveying side.

[0002] Specifically, the following applies to threshing cylinders: for the materials processed by threshing cylinders equipped with conveyor wings, the efficiency of threshing can be improved without setting new structures or reducing design freedom, and threshing residues caused by poor threshing can be prevented. Background Technology

[0003] Conventionally, regarding combine harvesters, the technology involving a threshing cylinder is known to perform threshing by rotating the threshing cylinder around a rotating axis within the threshing chamber of the threshing section. The threshing cylinder has crossbar members extending parallel to the axial direction of the rotating axis and having threshing teeth arranged in the front-rear direction. At least a portion between adjacent crossbar members is covered by a shielding member, and a plate-shaped member is provided on the shielding member as a conveying wing forming a spiral guide portion. As a result, it is possible to suppress poor movement of the processed material and threshing residue in the processing space between the outer peripheral surface of the threshing cylinder and the inner peripheral surface of the threshing chamber (see, for example, Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-182653 Summary of the Invention

[0007] However, regarding the threshing cylinder described in Patent Document 1, the crossbar members are square tubes that are square in cross-section. The aforementioned workpiece is held in a wide groove formed by the bottom of the partition members between adjacent crossbar members and the sidewalls of the crossbar members that stand up from the two circumferential ends of the bottom. The workpiece is then struck by the surface of the sidewalls and squeezed out radially outward. As a result, threshing is performed on the released workpiece between the top plate covering the upper surface of the threshing cylinder, the receiving net covering the lower surface of the threshing cylinder (hereinafter referred to as "threshing receiving part") and the threshing cylinder using threshing teeth. At this time, the radial depth of the wide groove becomes shallower and smaller, and its sidewalls are perpendicular to the bottom.

[0008] Therefore, in addition to the small impact area on the material being processed, the impact direction is also biased towards the circumference. As a result, the amount of material being processed when it is released towards the threshing receiving part and pressed for threshing is small, and the impact reaction force received by the material being processed from the threshing receiving part is also small. Therefore, the following problems exist: the threshing efficiency is greatly reduced, and the material being processed is not processed and is prone to threshing residue.

[0009] The present invention is proposed in view of the above problems, and its object is to provide a combine harvester having a threshing cylinder that can improve the threshing efficiency for the workpiece processed by the threshing cylinder with conveyor wings without setting new structures or reducing the degree of design freedom, and can prevent threshing residue due to poor threshing.

[0010] To achieve the above objectives, the present invention relates to a combine harvester comprising: a shielding member covering the periphery of a rotating shaft of a threshing cylinder rotatably supported within a threshing chamber, and defining an internal space together with the front and rear end panels of the threshing cylinder; a support rod extending parallel to the axis of rotation on the shielding member, with rod-shaped threshing teeth protruding radially outward from the upper surface of the support rod; and a conveying wing disposed between adjacent support rods, conveying the workpiece from an upstream conveying side of the threshing cylinder toward a downstream conveying side, wherein a connecting portion is provided in the threshing cylinder for connecting the base of the conveying wing to the shielding member, the connecting portion having a release structure comprising a striking surface having a radial depth greater than the radial thickness of the support rod and having an outwardly extending slope, and the striking surface extruding and releasing the workpiece moving between adjacent support rods radially outward.

[0011] Furthermore, by providing a connecting portion on the threshing cylinder to link the base of the conveyor blade to the shielding component, only the support strength of this connecting portion needs to be increased. This eliminates the need for extensive reinforcement and structural reconsiderations of the shielding component, which would be required if the conveyor blade, which bears a large load and impact, were directly fixed to the shielding component using only a small base. Moreover, the conveyor blade can be easily moved to a suitable position simply by adjusting the position of the connecting portion, allowing for a high degree of design freedom. As a result, manufacturing costs are reduced and maintainability is improved.

[0012] Furthermore, the connecting part has a release structure as follows: it has a striking surface with a radial depth greater than the radial thickness of the support rod and an outwardly expanding slope. This striking surface forces the workpiece moving between adjacent support rods radially outward for release. As a result, the striking area of ​​the striking surface striking the workpiece is increased, and the striking direction is also biased radially. This increases the amount of workpiece released towards the threshing receiving part and subjected to pressing threshing, as well as the impact reaction force received by the workpiece from the threshing receiving part. Therefore, the efficiency of the threshing process can be improved, and threshing residue due to poor threshing can be reliably prevented.

[0013] Furthermore, in this invention, the connecting portion includes: a threshing tooth frame, which is mounted and fixed on the support rod and connected to the shielding member, and the threshing teeth protrude radially outward from the upper surface of the threshing tooth frame; and a reinforcing member, the base of the conveying wing is fixed to the circumferential center of the reinforcing member, and the reinforcing member is connected to the shielding member, and the reinforcing member is bridged between threshing tooth frames on adjacent support rods.

[0014] In this configuration, the reinforcing member is securely supported at three circumferential points by the shielding member and the two threshing tooth frames. This increases the supporting strength of the reinforcing member, which in turn increases the supporting strength of the conveyor blades fixed above it, thereby improving the movement efficiency of the processed material. Consequently, the efficiency of the threshing process can be further improved, and threshing residue caused by poor threshing can be more reliably prevented.

[0015] Furthermore, in this invention, the reinforcing member comprises: a bottom fixed to a shielding member between adjacent support rods; and a sidewall extending from the bottom to the upper surface of the threshing tooth frame and having an inclined surface extending outward in a circumferential direction, the reinforcing member constituting a release structure that uses the inclined surface as the striking surface.

[0016] In this case, the radial depth of the wide groove formed by the bottom and left and right sidewalls of the reinforcing member is greater than the radial thickness of the support rod, extending from the upper surface of the reinforcing member, which is fixed above the support rod by means of the threshing tooth frame, to the upper surface of the bottom. Furthermore, an inclined surface extending outward in a circumferential direction is provided on the firmly supported reinforcing member as a striking surface. As a result, the striking area of ​​the striking surface that strikes the workpiece can be increased, the striking direction is also biased radially to increase the striking force, the amount of workpiece released toward the threshing receiving part and the impact reaction force received from the threshing receiving part are further increased, and threshing residue can be more reliably prevented due to reduced threshing efficiency.

[0017] Furthermore, in this invention, the conveying wing is composed of a plurality of conveying blades arranged at predetermined intervals in the circumferential direction of the threshing cylinder.

[0018] In this case, the function of the conveyor blades, which are spiral guides, can be freely adjusted according to various conditions such as the variety / growth and cultivation status of the threshing object, temperature / humidity and other threshing environment conditions by simply adjusting the position, angle and circumferential spacing of the conveyor blades. As a result, the amount and speed of movement of the processed material can be optimized, and the efficiency of threshing can be further improved while preventing threshing residue caused by poor threshing.

[0019] Furthermore, in this invention, the conveying wing, and the conveying wing corresponding to its beginning and end, are connected to the threshing teeth.

[0020] In this configuration, the stalks, guided by the threshing teeth of the threshing cylinder, are guided intact through the conveying vanes at the beginning position and into the spiral conveying vanes. After being conveyed from the upstream side to the downstream side, they are then conveyed intact from the conveying vanes at the end position through the threshing teeth to a position further downstream than the conveying vanes. This prevents stalk blockage before and after the conveying vanes, further improves the efficiency of the threshing process, and more reliably prevents threshing residue due to poor threshing.

[0021] In addition, in this invention, the conveying wing is only disposed on the upstream side of the threshing cylinder.

[0022] In this case, the load and impact from the threshing material during conveying are applied to the entire threshing cylinder via the conveyor wings, which can reliably prevent the threshing cylinder from failing to rotate, thereby preventing a decrease in the efficiency of the threshing process.

[0023] Furthermore, in this invention, the connecting portion includes a support member having: a protrusion that is fitted into the recess of the base of the conveying wing, and the top surface of which is at a position higher than the upper surface of the support rod; and a foot portion located at both circumferential ends of the protrusion and mounted and fixed on the shielding member, thereby enabling the conveying wing to be adjusted in position in the axial direction using the support member.

[0024] In this case, the position of the conveyor wing can be easily adjusted simply by changing the fixed position of the support component on the shielding component. This eliminates the need for design changes such as structural reconsiderations, allowing for a high degree of design freedom, reducing manufacturing costs, and improving maintainability.

[0025] Furthermore, in this invention, the support member has an inclined surface that extends outward in the circumferential direction in the protrusion, and is configured to use the inclined surface as the striking surface in a release structure.

[0026] In this case, the radial depth of the wide groove formed by the inclined portion / foot portion of the support member, the outer peripheral plane portion of the shielding member, the side surface of the support rod, etc., is the depth from the upper surface of the protrusion, which is located at a position higher than the upper surface of the support rod, to the upper surface of the foot portion, and is greater than the radial thickness of the support rod. Moreover, the inclined surface that extends outward in a circumferential direction is set as the striking surface of the support member that allows the position of the conveyor wing to be adjusted freely.

[0027] Therefore, by increasing the impact area of ​​the impact surface that strikes the workpiece and by making the impact direction more radial, it is also possible to easily make fine adjustments to the impact position. The amount of workpiece released toward the threshing receiving part and the impact reaction force received from the threshing receiving part are further increased, which can more reliably prevent threshing residue from being generated due to reduced threshing efficiency.

[0028] Additionally, in this invention, the conveying wing has a second threshing tooth.

[0029] In this case, the number of threshing teeth can be increased accordingly to extend the threshing time, or different types of threshing teeth, such as rod-shaped and slice-shaped threshing teeth, can be used to adjust the threshing effect. Therefore, the threshing performance of the threshing teeth can be freely adjusted according to various conditions such as the variety / growth status of the threshing object, temperature / humidity, and other threshing environment conditions, further improving the efficiency of the threshing process and preventing threshing residue due to poor threshing.

[0030] Furthermore, in this invention, the radial height of the second threshing tooth is the same as that of the threshing tooth.

[0031] In this case, it is possible to prevent uneven threshing caused by different radial heights of the two threshing teeth, and to prevent severe wear of specific threshing teeth, or to prevent the threshing cylinder from being blocked due to the concentration of knocking / winding / stretching of the threshing teeth on specific stalks, thus preventing smooth rotation. As a result, it is possible to extend the service life of the components, reduce manufacturing costs, improve maintainability, and further improve the efficiency of threshing, and more reliably prevent threshing residue caused by poor threshing.

[0032] Furthermore, in this invention, the shielding member is polygonal in cross-section, and the support rod supporting the threshing tooth and the support member supporting the second threshing tooth are both mounted on the outer peripheral plane of the polygon.

[0033] In this configuration, both the support rod and the support component can ensure a large mounting area on their outer peripheral planes, providing secure support for the threshing teeth / second threshing teeth. Even if a large load is applied to the threshing teeth / second threshing teeth during threshing due to loads or impacts from the threshed material, they will not fall off. This suppresses the reduction in threshing efficiency and more reliably prevents threshing residue caused by poor threshing.

[0034] Invention Effects

[0035] According to the present invention, a combine harvester includes: a shielding member that covers the area around the rotation axis of a threshing cylinder rotatably supported within a threshing chamber, and delineates the interior space together with the front and rear end panels of the threshing cylinder; a support rod that extends parallel to the axial direction of the rotation axis on the shielding member, with rod-shaped threshing teeth protruding radially outward from its upper surface; and a conveying wing disposed between adjacent support rods that conveys the workpiece from the upstream conveying side of the threshing cylinder toward the downstream conveying side. The threshing cylinder is configured such that, for workpieces processed by the threshing cylinder equipped with the conveying wing, the efficiency of threshing can be improved without introducing new structures or reducing design freedom, and threshing residue due to poor threshing can be prevented. Attached Figure Description

[0036] Figure 1 This is a left view showing the overall structure of a combine harvester equipped with the threshing drum according to the present invention.

[0037] Figure 2 This is a right view of a combine harvester.

[0038] Figure 3 This is a top view of the combine harvester.

[0039] Figure 4 This is a left-side sectional view of the threshing section.

[0040] Figure 5 This is a left view of the entire threshing cylinder.

[0041] Figure 6 This is a left view of the front of the threshing cylinder.

[0042] Figure 7 yes Figure 6 AA-direction sectional view.

[0043] Figure 8 It is a 3D view of the support rod. Figure 8 (a) is a partial perspective view of the support rod located in the high threshing zone. Figure 8 (b) is an enlarged stereoscopic view of the vicinity of the threshing tooth frame.

[0044] Figure 9This is a partial 3D view of the high threshing zone of the threshing cylinder.

[0045] Figure 10 This is an explanatory diagram of the reinforcing components. Figure 10 (a) is an overall perspective view of the reinforcing component fastened to the conveyor blades. Figure 10 (b) is Figure 7 A magnified view of a portion of the image.

[0046] Figure 11 This is a three-dimensional view of the entire threshing cylinder of other types.

[0047] Figure 12 yes Figure 11 BB-direction sectional view.

[0048] Figure 13 This is an explanatory diagram of the support components. Figure 13 (a) is a partial perspective view of the high threshing area of ​​the threshing cylinder, showing the installation status of the support components after the conveyor vanes and support plates are fastened together. Figure 13 (b) is a three-dimensional view of the support component.

[0049] Figure 14 yes Figure 12 A magnified view of a portion of the image.

[0050] Explanation of reference numerals in the attached figures

[0051] 1… combine harvester; 7b… threshing chamber; 20… threshing teeth; 29, 29X, 29Z… conveyor blades; 29a, 88a… blade base; 40, 80… threshing cylinder; 41… rotating shaft; 53, 54… end panels; 55, 85… support rods; 55a, 85a… (upper surface of support rods); 56, 79… shielding components; 57, 81… internal space; 62, 62L, 62R… threshing tooth frame; 62a1… ( 64…reinforcing member; 64a…bottom of member; 64b, 64c…sidewall; 65a, 65b, 95a, 95b…inclined surface (striking surface); 73, 92…release structure; 74, 91…connecting part; 75, 87…conveying wing; 79c…outer peripheral plane; 88a1…recess; 89…support member; 89a…protrusion; 89b…foot; 94…second threshing tooth. Detailed Implementation

[0052] Hereinafter, embodiments of the present invention relating to combine harvesters will be described with reference to the accompanying drawings in order to understand the present invention.

[0053] In addition, Figure 1 The direction indicated by arrow F is defined as the front of the combine harvester 1 involved in this invention, and the positions and directions of the components described below are based on this front F.

[0054] First, using Figures 1 to 4 , Figure 7 The overall structure of the combine harvester 1 involved in this embodiment will be described.

[0055] The combine harvester 1 is a common type of combine harvester that harrows, threshes / screens / stores the harvested crops (rice, wheat, soybeans, corn, etc.) into the machine body, and can appropriately output them to the outside of the machine body. Moreover, the combine harvester 1 has: a traveling body 2 capable of autonomous movement; and a cutting section 3, which is located at the front end of the traveling body 2.

[0056] The cutting section 3 is configured as a cutting device that cuts and picks up the uncut ears of rice, wheat, etc., and can be mounted on the traveling body 2 in a lifting and lowering manner.

[0057] The traveling body 2 includes a traveling section 4 configured as a tracked traveling device with a pair of left and right track sections 5, 5. A body frame 6 is mounted between the left and right track sections 5, 5. Each track section 5 has: multiple rotating bodies, which include a drive sprocket 5a disposed at its front end; and a track 5c wound around the rotating body. The drive sprocket 5a is driven to rotate by power transmitted from the engine 25 of the combine harvester 1.

[0058] Furthermore, on the aforementioned frame 6 and on its left side, there is a threshing section 7 that threshes the ears of grain supplied by the cutting section 3; and a screening section 8 that screens the grains threshed by the threshing section 7. The threshing section 7 and the screening section 8 are arranged behind the cutting section 3 with the threshing section 7 on the upper layer and the screening section 8 on the lower layer.

[0059] A grain storage section 9 is provided on the aforementioned frame 6 and on the right side of the threshing section 7 and the screening section 8. The grain storage section 9 has a grain box 10 for storing the grains (refined grains) screened by the screening section 8.

[0060] A lower discharge conveyor (not shown) is provided inside the grain bin 10 to convey stored grains toward the discharge port of the grain bin 10. A longitudinal conveyor 12 is erected vertically in a manner communicating with the discharge port of the grain bin 10. Furthermore, a grain discharge conveyor 13 is connected to the upper end of the longitudinal conveyor 12 in a manner that allows it to rotate horizontally and swing up and down about a horizontal axis.

[0061] The above-mentioned conveyor transports the grains in the grain bin 10 and discharges them from the rice inlet 14 located at the end of the grain discharge conveyor 13 to the cargo box of a truck, container, etc.

[0062] Furthermore, a driver's cab 15 is provided on the aforementioned frame 6, in front of the grain storage section 9, that is, on the right front part of the frame 6, for the operator to ride in.

[0063] The driver's compartment 15 is covered by the cab 16 and is equipped with a driver's seat 17, a steering wheel 18 located in front of the driver's seat 17, a main gear lever 19 / auxiliary gear lever, a working clutch lever as a working operating element for engaging and disengaging a threshing clutch / cutting clutch (not shown), and other operating parts.

[0064] An engine 25, which serves as the aforementioned drive source, is located below the driver's compartment 15. This engine 25 is positioned on the front right side of the fuselage frame 6, utilizing the space below the driver's compartment 15, and is, for example, a diesel engine.

[0065] In addition, the detailed structure of the aforementioned cutting section 3, threshing section 7 and screening section 8 will be described below.

[0066] The harvesting section 3 includes a feeder 30 as a conveying device, a platform 31 as a grain harvesting table, a cutter device 32, a pair of left and right dividers 33, 33, and a harrowing reel 34.

[0067] The feeder 30 is a supply conveying device that transports the stalks cut by the cutting section 3 to the threshing section 7. It has a feed chamber 35 as a shell and a conveyor (not shown) for transporting the stalks installed in the feed chamber 35. The feed chamber 35 is configured as an approximately quadrangular cylinder with the front-to-back direction set as the length direction when viewed from above.

[0068] Furthermore, the feeder 30 is located on the left side of the cab 16, and the rear opening of the feed chamber 35 is connected to the threshing port 7a on the front side of the threshing section 7.

[0069] The platform 31 is configured as a horizontally elongated bucket and is connected to the front side of the feeder 30 in a manner that communicates with the front opening of the feeding chamber 35.

[0070] Furthermore, a rake auger 37 is installed inside the platform 31, which is configured to rotate back and forth with the left and right directions as the rotation axis.

[0071] The cutting device 32 is located at the lower front edge of the platform 31 and is configured as a pusher.

[0072] The left and right pairs of seedlings 33 are configured to protrude forward from the left and right sides of the front of the platform 31.

[0073] The harrowing reel 34 is a reel with a toothed beam, which is located in front of and above the harrowing auger 37. It is supported at the base end between the ends of a pair of left and right reel support arms 34a, 34a on the platform 31, so that it can rotate in the left and right direction as the axis of rotation.

[0074] As a result, the harrowing reel 34 rotates while continuously acting on the pod-bearing part of the ear stalk, thus harrowing the pod-bearing part of the ear stalk towards the harrowing auger 37.

[0075] The movement of each part of the cutting section 3, which is constructed in this way, is powered by the engine 25, which is transmitted through various transmission mechanisms.

[0076] Furthermore, a front rotating member 26 is provided on the rear side of the feeder 30 to feed the stalks conveyed by the conveyor (not shown) in the feeding chamber 35 into the threshing port 7a.

[0077] The front rotating member 26 is located between the end of the conveyor and the threshing port 7a within the feeding chamber 35. The front rotating member 26 has: a roughly cylindrical rotating member body 27 called a threshing drum or the like; and a front rotating member shaft 28 with the left-right direction as its axis.

[0078] Thus, the stalks conveyed by the feeder 30 are fed from the end of the conveyor in the feeding chamber 35 into the threshing chamber 7b of the threshing section 7 through the front rotating member 26.

[0079] Furthermore, the conveyor in the feeding chamber 35 has a cutting input shaft 38 located at the front of the threshing section 7 and with the left-right direction set as the axis direction, serving as a drive shaft that supports the end side of the conveyor.

[0080] The rear end support of the feeder 30 is capable of rotating relative to the traveling body 2 with the cutting section input shaft 38 as the rotation axis, and a lifting cylinder 39, which is a hydraulic cylinder, is sandwiched between the lower surface of the feeding chamber 35 and the body frame 6.

[0081] Furthermore, the cutting section 3 is configured to perform lifting and lowering operations by rotating the feeder 30 relative to the traveling body 2, which accompanies the extension and retraction of the lifting cylinder 39.

[0082] Therefore, by raising and lowering the cutting section 3, the cutting section 3 is raised and lowered with the cutting section input shaft 38 as the rotation support, thereby adjusting the height of the cutting section 3. Moreover, this raising and lowering operation of the cutting section 3 is performed using the operating part provided in the aforementioned driving section 15.

[0083] The threshing section 7 includes: a threshing cylinder 40 according to the present invention, which is disposed within a threshing chamber 7b that opens forward from the threshing port 7a; and a receiving net 42 disposed below the threshing cylinder 40. Furthermore, the threshing chamber 7b is formed by a frame 21 disposed on the machine body frame 6.

[0084] The threshing cylinder 40, which will be described in detail later, is rotatably supported within the threshing chamber 7b by a rotating shaft 41 with the front-to-back direction as its axis, and has a cylindrical main body 11 that is dodecagonal in cross-section in this embodiment, with the rotating shaft 41 as its central axis. Furthermore, a plurality of rod-shaped threshing teeth 20 protrude radially outward from the outer peripheral surface of the main body 11, and the upper part of the threshing cylinder 40 has a conveying wing 75 that conveys the processed material from the upstream side of the conveying to the downstream side of the conveying.

[0085] Regarding the receiving net 42, it is arranged so that the grains leak downwards and along the outer circumferential surface of the lower part of the threshing cylinder 40. Regarding the conveying wing 75, it is composed of a plurality of conveying wing blades 29 arranged at predetermined intervals in the circumferential direction of the threshing cylinder 40.

[0086] The screening section 8 includes: a swing screening device 43, which is disposed below the threshing section 7 and serves as a swing screening section, separated by a receiving net 42; a swing mechanism 44, which includes a swing shaft 44a; a first-grade product conveyor 45; a second-grade product conveyor 46; and a winnowing machine 47.

[0087] The swing mechanism 44 uses the rotational power from the drive source to drive the swing shaft 44a to rotate, so that the swing screening device 43 swings back and forth in a predetermined direction that is the front and back direction when viewed from above.

[0088] As a structure for gravity screening, the oscillating screening device 43 includes: an upper grain disc 111; a coarse screen 120 disposed behind the upper grain disc 111 to adjust the downward leakage amount (falling leakage amount) of grains for coarse screening; a lower grain disc 112 disposed below the coarse screen 120; and a grain sieve 30 disposed below the coarse screen 120.

[0089] The winnowing machine 47 delivers screening air from the lower front to the upper rear for this oscillating screening device 43. Furthermore, an auxiliary winnowing machine 71, which serves as a primary fan, is provided at the upper front of the winnowing machine 47, and a secondary fan 72 is provided at the rear of the winnowing machine 47, between the first-grade conveyor 45 and the second-grade conveyor 46 arranged in front and behind.

[0090] The first-grade product conveyor 45 is disposed within a first-grade product guide trough 45b that extends along the width of the machine body in a manner that allows first-grade grains (first-grade products) to be collected. The second-grade product conveyor 46 is disposed behind the first-grade product conveyor 45 within a second-grade product guide trough 46b that extends along the width of the machine body in a manner that allows second-grade grains (second-grade products) to be collected.

[0091] A reduction conveyor 48 is provided on the right side of the machine body where the threshing section 7 and the screening section 8 are arranged, with its lower end connected to the aforementioned second-grade product conveyor 46, and its upper end located near the front end of the threshing cylinder 40, extending in an inclined manner with the front higher than the back.

[0092] Furthermore, a winnowing conveyor (not shown) extending vertically is provided on the right side of the reduction conveyor. This winnowing conveyor is capable of conveying the first-grade product from the first-grade product conveyor 45 into the aforementioned grain bin 10.

[0093] The combine harvester 1 with the above structure raises the cutting section 3 relative to the ground to a desired height, such as the cutting height of the stalk of the harvested crop, by the lifting action of the feeder 30 centered on the cutting section input shaft 38 in the field, thereby changing from a non-operating state to an operating state and traveling in the operating state using the traveling body 2.

[0094] Thus, the harvesting section 3 divides the harvested crop into harvestable and non-harvested parts by dividing the crop into harvestable and non-harvested parts using the left and right dividing bodies 33, 33. While using the harrowing and pulling reel 34 to harrow the pod-bearing part on the tip of the ear stalk of the harvestable part, the cutting device 32 cuts the pod-bearing part of the ear stalk.

[0095] The pod-bearing portion of the ear stalks cut at the desired cutting position is rake-gathered into the platform 31 by a rotary-driven rake-gathering auger 37, and the pod-bearing portion of the ear stalks is gathered near the intake of the feeding chamber 35 in the platform 31 by the conveying action of the rake-gathering auger 37 and taken into the feeding chamber 35 from the intake.

[0096] The stalks taken into the feeding chamber 35 are fed into the threshing section 7 by means of a conveyor (not shown) after passing through the feeding chamber 35.

[0097] The pod-bearing portion of the ear stalks supplied to the threshing section 7 is threshed by the threshing section 7. Specifically, the ear stalks supplied to the threshing section 7 are conveyed rearward using a rotating threshing cylinder 40, while threshing is mainly carried out between the threshing cylinder 40 and the receiving net 42.

[0098] Grains and other threshed materials smaller than the mesh size of the receiving net 42 leak downwards from the receiving net 42. On the other hand, straw and other materials that do not leak downwards from the receiving net 42 are discharged into the field through the dust discharge port 8a located at the rear of the screening section 8 by the conveying action of the threshing cylinder 40.

[0099] As mentioned above, the grains threshed by the threshing section 7 and leaking downwards from the receiving net 42 are screened by the screening section 8. Specifically, the threshed material leaking downwards from the receiving net 42 is screened by the gravity screening action of the oscillating screening device 43 and the wind screening action of the winnowing machine 47 to separate and remove fine grains (first grade), grains with branches and stalks and straw mixtures (second grade), and straw scraps.

[0100] First-grade grains falling from the oscillating screening device 43 are conveyed to the grain bin 10 using a first-grade conveyor 45 and a winnowing conveyor 49 connected thereto. Meanwhile, second-grade grains are returned to the threshing start side of the threshing cylinder 40 by a second-grade conveyor 46 and a reduction conveyor 48 connected thereto for further threshing. Furthermore, straw scraps and other debris are discharged into the field through a dust outlet 8a located at the rear of the screening section 8.

[0101] Next, using Figures 4 to 10 The detailed structure of the aforementioned threshing cylinder 40, which is located in the threshing chamber 7b of the threshing section 7, will be described.

[0102] like Figure 4 , Figure 5 , Figure 7 As shown, the threshing chamber 7b is formed in the frame 21 by the top part 7c covering the upper side of the threshing cylinder 40 and the aforementioned receiving net 42 covering the lower side of the threshing cylinder 40, which are approximately circular in cross-section.

[0103] Multiple dust valves 22 are provided in the top part 7c, which can be rotated horizontally around the shaft 23 provided in the top part 7c along the threshing cylinder 40 to adjust the conveying speed (retention time) of the processed material in the threshing chamber 7b.

[0104] Furthermore, in the threshing chamber 7b of this structure, the rotating shaft 41 of the threshing cylinder 40 is supported by the front plate 21a and the rear plate 21b provided at the front and rear parts of the frame 21, and a bevel gear 51 is provided at the front of the rotating shaft 41 to transmit power from the aforementioned engine 25. With the help of the bevel gear 51 and the power of the engine, the rotating shaft 41 is rotated clockwise in the main view, thereby driving the threshing cylinder 40 to rotate.

[0105] The spiral-shaped wings 52b are embedded in the conical body portion 52a, and the rake portion 52 is integrally disposed at the front of the rotating shaft 41. The rake portion 52 constitutes part of the threshing cylinder 40. Thus, the ears of grain fed by the aforementioned feeder 30 are guided by the rake portion 52, which rotates together with the threshing cylinder 40, to the threshing teeth 20 of the threshing cylinder 40.

[0106] A circular front panel 53 and a rear panel 54 are respectively provided near the front and rear ends of the rotating shaft 41. The front panel 53 and the rake part 52 are integrated.

[0107] Furthermore, the aforementioned front panel 53 and rear panel 54 are connected by a shielding member 56, which is polygonal in cross-section and dodecagonal in cross-section in this embodiment. The shielding member 56 covers the area around the rotating shaft 41 of the threshing cylinder 20.

[0108] In addition, in this embodiment, the shielding component 56 is assembled into a square tube by joining the long sides of the 12 long shielding plates 56a together by welding or the like. However, it can also be an integral piece made by processing a single cylindrical tube. The manufacturing method is not particularly limited.

[0109] Furthermore, the main body 11 of the aforementioned threshing cylinder 40 is formed by the aforementioned front and rear end panels 53, 54 and shielding member 56, and an internal space 57 is defined within the main body 11.

[0110] Four partition plates 58, orthogonal to the axis of rotation 41, are inserted into the internal space 57 at equal intervals in the front-back direction, forming three chambers 57a, 57b, and 57c in sequence from the front. The partition plates 58 are used to strengthen the shielding member 56 from the inside to improve its rigidity.

[0111] The partition plate 58 is a dodecagon with the same size and shape as the inner circumferential surface of the shielding member 56. Its outer circumference can abut against the inner circumferential surface of the shielding member 56. A shaft hole 58a is provided through the center of the partition plate 58 for the aforementioned rotating shaft 41 to be inserted and fixed. The rotating shaft 41 is firmly connected to the main body 11 by means of multiple partition plates 58, so that the rotational force of the rotating shaft 41 can be reliably transmitted to the threshing cylinder 40.

[0112] Multiple connecting holes 58b of the same size are provided around the shaft hole 58a and through it in the circumferential direction with the same radius. This allows the partition plate 58 to be made lighter according to the amount of opening, thereby increasing the rotation speed of the threshing cylinder 40 and improving the efficiency of the threshing process.

[0113] In addition, such as Figures 5 to 8As shown above, the shielding member 56 is dodecagonal in cross-section, and therefore has 12 vertex corners 56b and an outer peripheral plane 56c connecting them. The support rod 55 extends parallel to the axial direction of the rotation axis 41 on the outer peripheral plane 56c.

[0114] The support rod 55 is formed into a square tube shape when viewed in cross-section, and is disposed on an outer peripheral plane portion 56c that is spaced one apart in the circumferential direction. Furthermore, the rod-shaped threshing teeth 20 protrude radially outward from its upper surface 85a.

[0115] Furthermore, on the same outer peripheral plane portion 56c as the support rod 55, multiple U-shaped fixing brackets 59, which open radially outward when viewed from the side, are arranged in the front-rear direction.

[0116] The thicker bracket base 59a at the bottom of the fixed bracket 59 is fastened to the outer peripheral plane 56c in a detachable manner by means of left and right bolts 60, 60. Moreover, the front and rear bracket clamping parts 59b, 59c are erected from the front and rear ends of the bracket base 59a. On either of the bracket clamping parts 59b, 59c, the U-shaped engaging recesses 59b1, 59c1 that open radially outward when viewed from the front are approximately centrally open in the left and right direction.

[0117] Thus, the support rod 55 is inserted and welded from above into the engaging recesses 59b1 and 59c1, and the support rod 55 is integrated with the fixing bracket 59. This allows the support rod 55 to be fixed to the outer peripheral plane 56c of the shielding member 56 by means of multiple fixing brackets 59.

[0118] In this structure, the outer peripheral plane portion 56c of the fixed bracket 59 is positioned such that the outer periphery of the aforementioned four partition plates 58 is positioned to abut against the inner peripheral surface of the shielding member 56, thereby increasing the rigidity of the outer peripheral plane portion 56c at the position of the fixed bracket 59 and firmly supporting the fixed bracket 59.

[0119] The lower surface 55b of the support rod 55 supported by the fixed bracket 59 is separated from the thickness h1 of the bracket base 59a of the fixed bracket 59 from the outer peripheral plane portion 56c. Therefore, compared with the case where the support rod 55 is directly set on the outer peripheral plane portion 56c, the upper surface 55a of the support rod 55 is set at a higher position.

[0120] Furthermore, on the support rod 55 of the region (hereinafter referred to as the "high threshing region") 61 held by the first and second partition plates 58 starting from the front of the threshing cylinder 40, a plurality of threshing tooth frames 62 are mounted and fixed, which are shaped such that the front and rear ends of the rectangular plates that are longer in the front-rear direction when viewed from above bend downwards.

[0121] Regarding the threshing tooth frame 62, the front and rear frame clamping parts 62b and 62c are provided hanging down from the front and rear ends of the rectangular frame base 62a. On either of the frame clamping parts 62b and 62c, the U-shaped engaging recesses 62b1 and 62c1 that open radially inward when viewed from the front are approximately open in the center in the left-right direction.

[0122] Thus, the engaging recesses 62b1 and 62c1 are externally inserted into the aforementioned support rod 55 from above, thereby enabling the multiple threshing tooth frames 62 to be mounted and fixed on the support rod 55.

[0123] The threshing tooth frame 62 is such that its upper surface 62a1 is separated from the upper surface 55a of the support rod 55 by the thickness h2 of the frame base 62a, and the upper surface 62a1 of the threshing tooth frame 62 is set at a higher position than the upper surface 55a of the support rod 55.

[0124] Furthermore, in the aforementioned support rod 55, when viewed from above, support holes 55a1 and 55b1 are provided at equal intervals along the entire length of the width center line in the vertical direction, allowing the aforementioned rod-shaped threshing teeth 20 to be inserted radially. In addition, in the frame base 62a of the threshing tooth frame 62 provided in the high threshing region 61, when viewed from above, support holes 62a2 and 62a3 are provided along the width center line and in the front-back direction, allowing the same threshing teeth 20 to be inserted radially. The threshing teeth 20 protrude radially outward from the upper surface 62a1 of the threshing tooth frame 62.

[0125] Therefore, the threshing teeth 20, which are located further downstream of the conveying zone than the aforementioned high threshing zone 61, are supported at two points above and below the support holes 55a1 and 55b1 on the support rod 55. In contrast, the threshing teeth 20 in the high threshing zone 61 are supported at three points above and below the support holes 55a1 and 55b1 on the support rod 55, as well as at the support holes 62a2 or 62a3 on the threshing tooth frame 62. Thus, the support strength of the threshing teeth 20 in the high threshing zone 61 can be increased.

[0126] In addition, when viewed from above, fixing holes 62a4 for fixing the reinforcing member 64 (described later) to the threshing tooth frame 62 are provided through the frame base 62a of the threshing tooth frame 62 near the four corners.

[0127] As described above, the aforementioned conveying wings 75 are provided only in the high threshing area 61 located on the upstream side of the conveying of the threshing cylinder 40, between adjacent support rods 55 on the outer peripheral plane portion 56c of the shielding member 56.

[0128] That is, when the conveying wing 75 is only arranged on the upstream side of the conveying of the threshing cylinder 40, the load and impact from the threshing material during conveying are applied to the entire threshing cylinder 40 through the conveying wing 75, which can reliably prevent the threshing cylinder 40 from failing to rotate, thereby preventing the efficiency of the threshing process from decreasing.

[0129] In addition, such as Figure 9 , Figure 10 As shown, the conveying wing 29 constituting the aforementioned conveying wing 75 is a fan-shaped plate that is radially outward when viewed from the front and is disposed between adjacent support rods 55. Its lower end is bent forward to form a trapezoidal wing base 29a that is open to the rear when viewed from the top. The wing base 29a has left and right mounting holes 29a1, 29a1 through its circumferential ends, and is disposed on a reinforcing member 64 that is shaped such that the circumferential ends of the rectangular plate that is longer in the front-rear direction are bent upward.

[0130] The reinforcing member 64 has: a rectangular member bottom 64a that is located on the outer peripheral plane 56c of the shielding member 56 between adjacent support rods 55 and is longer in the front-rear direction when viewed from above; and left and right sidewalls 64b and 64c that bend obliquely upward from the two circumferential ends of the member bottom 64a.

[0131] A plurality of fixing holes 64a1 are provided through the bottom 64a of the component. After the wing base 29a is placed at the circumferential center of the bottom 64a of the component, bolts 63 can be screwed into the fixing holes (not shown) of the lowest layer shielding plate 56a through the mounting holes 29a1 of the wing base 29a and the fixing holes 64a1 of the bottom 64a. Thus, the wing base 29a, which serves as the base of the conveying wing 29, is fixed to the circumferential center of the reinforcing member 64, and the bottom 64a of the reinforcing member 64 is fixed to the shielding member 56.

[0132] by Figure 10 Taking (b) as an example, the left sidewall portion 64b has: an inclined portion 64b1, which extends from the circumferential left edge of the bottom 64a of the aforementioned component to the upper surface 62a1 of the frame base 62a of the threshing tooth frame 62L located on the left side in the main view, and has an inclined surface 65a extending circumferentially outward; and a locking portion 64b2, which bends circumferentially outward from the upper edge of the inclined portion 65b1, and its lower surface abuts against the upper surface 62a1 of the frame base 62a.

[0133] The locking portion 64b2 has multiple fixing holes 64b3. After the locking portion 64b2 is placed on the upper surface 62a1 of the frame base 62a of the threshing tooth frame 62L, bolts 63 can be screwed into fixing holes (not shown) of the lowest layer shielding plate 56a through the fixing holes 64b3 of the locking portion 64b2 and the fixing holes 62a4 of the frame base 62a. This securely fastens the left sidewall portion 64b of the reinforcing member 64 to the shielding member 56.

[0134] Similarly, the right-side sidewall portion 64c also has: an inclined portion 64c1, which extends from the circumferential right end edge of the bottom 64a of the aforementioned component to the upper surface 62a1 of the frame base 62a of the threshing tooth frame 62R located on the right side in the front view, and has an inclined surface 65b extending circumferentially outward; and a locking portion 64c2, which bends circumferentially outward from the upper edge of the inclined portion 65c1 and whose lower surface abuts against the upper surface 62a1 of the frame base 62a.

[0135] Multiple fixing holes 64c3 are also provided through the locking portion 64c2. After the locking portion 64c2 is placed on the upper surface 62a1 of the frame base 62a of the threshing tooth frame 62R, the bolt 63 can be screwed into the fixing hole (not shown) of the bottommost shielding plate 56a through the fixing holes 64c3 of the locking portion 64c2 and the fixing holes 62a4 of the frame base 62a. In this way, the right side wall portion 64c of the reinforcing member 64 is fastened to the shielding member 56.

[0136] As described above, in the component bottom 64a, left and right side wall portions 64b and 64c constituting the reinforcing component 64, the component bottom 64a is directly fastened to the shielding component 56, and the left and right side wall portions 64b and 64c are fastened to the shielding component 56 by means of the left and right threshing tooth frames 62.

[0137] Thus, as described above, the left and right threshing tooth frames 62L and 62R, which are mounted and fixed on the support rod 55, are connected to the shielding member 56 by means of the reinforcing member 64. Furthermore, the reinforcing member 64 is a support structure that is bridged between the left and right threshing tooth frames 62L and 62R. Therefore, the reinforcing member 64 is firmly supported by the shielding member 56 and the threshing tooth frames 62L and 62R at three points in the circumferential direction, thereby increasing the support strength of the reinforcing member 64.

[0138] In addition, such as Figure 7 , Figure 10 As shown, regarding the reinforcing member 64, a wide groove (hereinafter referred to as "wide groove") 66 is formed by the bottom 64a of the member and the left and right inclined portions 64b1 and 64c1 of the left and right sidewall portions 64b and 64c.

[0139] Furthermore, the radial depth D of the wide groove 66 represents the distance from the threshing tooth frame 62 ( Figure 10 The depth from the upper surfaces 64b4 and 64c4 of the locking portions 64b2 and 64c2 of the reinforcing member 64 (62L and 62R) fixed above the support rod 55 to the upper surface 64a2 of the component bottom 64a of the reinforcing member 64 is such that the higher the height H from the outer peripheral plane portion 56c of the shielding member 56 to the upper surfaces 64b4 and 64c4 of the reinforcing member 64, the greater the radial depth D.

[0140] Here, as mentioned above, the support rod 55 is positioned such that its lower surface 55b is separated from the thickness h1 of the bracket base 59a of the fixed bracket 59 from the outer peripheral plane portion 56c, and the upper surface 55a of the support rod 55 is higher than that of the case where the support rod 55 is directly mounted on the outer peripheral plane portion 56c.

[0141] A threshing tooth frame 62 is fixed on the upper surface 55a of the support rod 55, and the upper surface 62a1 of the threshing tooth frame 62 is separated from the upper surface 55a of the support rod 55 accordingly from the thickness h2 of the frame base 62a.

[0142] On the upper surface 62a1 of the threshing tooth frame 62, the locking portions 64b2 and 64c2 of the reinforcing member 64 are fixedly mounted, and the upper surfaces 64b4 and 64c4 of the locking portions 64b2 and 64c2 and the thickness h3 of the locking portions 64b2 and 64c2 are respectively separated from the upper surface 62a1 of the threshing tooth frame 62.

[0143] Therefore, compared with the case where the support rod 55 is directly set on the outer peripheral plane portion 56c, the height H from the upper surface 64b4, 64c4 of the reinforcing member 64 can be increased in accordance with the sum of the thicknesses h1, h2, h3 of the fixed bracket 59, the threshing tooth frame 62, and the reinforcing member 64, and the radial depth D of the wide groove 66 can be increased.

[0144] Therefore, regarding this wide groove 66, its radial depth D can be set to be greater than the radial thickness ha of the support rod 55. As mentioned above, if the processed material in the rotating threshing cylinder 40 is held in the wide groove 66 and squeezed out radially outward, the capacity of the processed material that can be held is increased, thereby significantly increasing the amount of processed material released toward the threshing receiving part.

[0145] Furthermore, regarding this wide groove 66, the inclined surfaces 65a and 65b, which extend outward in a circumferential direction, function as striking surfaces to expel the workpiece held in the wide groove 66 radially outward. The striking direction and striking area at this time are also... Figure 10 Let's take (b) as an example to illustrate.

[0146] On the inclined surface 65a on the left, if the standing position is changed from 67 to 68, the buckling angle increases from θ1 to θ2, making the slope gentler.

[0147] As a result, the striking area of ​​the inclined surface 65a increases, and the striking direction of the inclined surface 65a shifts from arrow 69 to arrow 70 and deviates radially.

[0148] If the impact direction is biased towards the radial direction, the angle of incidence of the processed material towards the threshing receiving part decreases, and the impact reaction force on the processed material from the threshing receiving part increases.

[0149] Therefore, by setting the inclined surfaces 65a and 65b, which are not vertical but have a gentle slope, as the striking surfaces, the efficiency of the threshing process can be improved.

[0150] Moreover, as mentioned above, the reinforcing member 64 that provides the inclined surfaces 65a and 65b is also firmly supported, thus increasing the impact force of the inclined surfaces 65a and 65b.

[0151] As described above, the following connecting part 74 can be provided: it is composed of a reinforcing member 64 having inclined surfaces 65a and 65b as striking surfaces and the aforementioned threshing tooth frame 62, and is used to connect the wing base 29a, which is the base of the conveying wing 29 of the conveying wing 75, to the shielding member 56.

[0152] Furthermore, the connecting part 74 has a release structure 73 that uses the inclined surfaces 65a and 65b, which serve as striking surfaces, to expel the processed material that moves between adjacent support rods 55 radially outward.

[0153] That is, the combine harvester 1 includes: a shielding member 56 that covers the area around the rotating shaft 41 of the threshing cylinder 40, which is rotatably supported within the threshing chamber 7b, and together with the front and rear end panels 53 and 54 of the threshing cylinder 40, defines an internal space 57; a support rod 55 that extends parallel to the axis of rotation of the rotating shaft 41 on the shielding member 56, with rod-shaped threshing teeth 20 protruding radially outward from its upper surface 55a; and a conveying wing 75 disposed between adjacent support rods 55, which conveys the workpiece from the upstream conveying side of the threshing cylinder 40 to the downstream conveying side, wherein the threshing cylinder 40 is provided with a wing base 29a for conveying wing blades 29, which serve as the base of the conveying wing 75, and the shielding member 56. The connecting portion 74 of component 56 has a release structure 73 as follows: it has impact surfaces, i.e., inclined surfaces 65a and 65b, with a radial depth D greater than the radial thickness ha of the support rod 55 and an outwardly expanding slope. The inclined surfaces 65a and 65b are used to expel the workpiece moving between adjacent support rods 55 radially outward. Therefore, by providing the connecting portion 74 as described above, only the support strength of the connecting portion 74 needs to be increased. This eliminates the need for extensive reinforcement and structural reconsiderations of the shielding component 56, which would be required if the large load and impact of the conveying wing 75 were directly fixed to the shielding component 56 using only a small area of ​​the wing base 29a. Furthermore, the conveying wing 75 can be freely moved to an appropriate position simply by adjusting the position of the connecting portion 74, allowing for a high degree of design freedom. This results in reduced manufacturing costs and improved maintainability.

[0154] Furthermore, due to the aforementioned release structure 73, the impact area of ​​the inclined surfaces 65a and 65b that strike the workpiece is increased, and the impact direction is also biased towards the radial direction. This increases the amount of workpiece released towards the threshing receiving part and the impact reaction force received by the workpiece from the threshing receiving part. As a result, the efficiency of the threshing process can be improved, and threshing residue caused by poor threshing can be reliably prevented.

[0155] The connecting part 74 includes: a threshing tooth frame 62, which is mounted and fixed on the support rod 55 and connected to the shielding member 56, with the threshing teeth 20 protruding radially outward from its upper surface 62a1; and a reinforcing member 64, which fixes the wing base 29a of the conveying blade 29, which serves as the base of the conveying blade 75, to the circumferential center and is connected to the shielding member 56. The reinforcing member 64 is bridged between the threshing tooth frames 62L and 62R on adjacent support rods 55. In this case, the reinforcing member 64 is firmly supported at three points circumferentially by the shielding member 56 and the two threshing tooth frames 62L and 62R, thereby increasing the support strength of the reinforcing member 64, and consequently increasing the support strength of the conveying blade 29 fixed above it, thus improving the movement efficiency of the processed material. As a result, the efficiency of the threshing process can be further improved, and threshing residue caused by poor threshing can be more reliably prevented.

[0156] The reinforcing member 64 includes: a member bottom 64a, which is fixed to a shielding member 56 between adjacent support rods 55; and sidewall portions 64b and 64c, which extend from the member bottom 64a to the upper surfaces 62a1 and 62a1 of the threshing tooth frames 62L and 62R, and have inclined surfaces 65a and 65b that extend outward in a circumferential direction, forming a release structure 73 that uses the inclined surfaces 65a and 65b as striking surfaces. In this case, the member bottom of the reinforcing member 64... The radial depth D of the wide groove 66, formed by part 64a and the left and right sidewall parts 64b and 64c, is greater than the radial thickness ha of the support rod 55. This depth extends from the upper surface 64b4 and 64c4 of the reinforcing member 64, which is fixed above the support rod 55 by means of the threshing tooth frames 62L and 62R, to the upper surface 64a2 of the bottom 64a of the member. Furthermore, the inclined surfaces 65a and 65b, which extend outward in a circumferential direction, are provided on the firmly supported reinforcing member 64 as striking surfaces. As a result, the striking area of ​​the striking surface that strikes the workpiece can be increased, the striking direction is also biased radially to increase the striking force, the amount of workpiece released toward the threshing receiving part and the impact reaction force received from the threshing receiving part are further increased, and threshing residue can be more reliably prevented due to reduced threshing efficiency.

[0157] In addition, such as Figure 9 As shown, as previously described, the conveying wing 75 consists of a plurality of conveying blades 29 arranged at predetermined intervals in the circumferential direction of the threshing cylinder 40.

[0158] Furthermore, in this embodiment, the aforementioned rod-shaped threshing teeth 20 are sandwiched between adjacent conveying blades 29 in the circumferential direction, and the threshing teeth 20 are also connected to the conveying blades 29X and 29Z corresponding to the beginning and end of the conveying blade 75.

[0159] Thus, the stalks guided by the threshing teeth 20 of the threshing cylinder 40 can be smoothly introduced into the conveying vane 29X at the beginning position, preventing them from flowing out from the gap between adjacent conveying vanes 29 during subsequent conveying, and can be smoothly conveyed to the downstream side of the conveying from the conveying vane 29Z at the end position.

[0160] That is, when the conveyor wing 75 is composed of multiple conveyor blades 29 arranged at predetermined intervals in the circumferential direction of the threshing cylinder 40, the function of the conveyor wing 75 as a spiral guide can be freely adjusted according to various conditions such as the variety / growth and cultivation status of the threshing object, temperature / humidity and other threshing operation environment by simply adjusting the position, angle and circumferential interval of the conveyor blades 29. As a result, the amount and speed of movement of the processed material can be optimized, and the efficiency of threshing can be further improved while preventing threshing residue caused by poor threshing.

[0161] Regarding the conveyor wing 75, the conveyor blades 29X and 29Z corresponding to the beginning and end of the conveyor wing 75 are connected to the threshing teeth 20. In this case, the stalks guided by the threshing teeth 20 of the threshing cylinder 40 are guided from the threshing teeth 20 through the conveyor blades 29X at the beginning position and introduced in their original form into the spiral conveyor wing 75. After being conveyed from the upstream side to the downstream side, they can be conveyed in their original form from the conveyor blades 29Z at the end position through the threshing teeth 20 to a position further downstream than the conveyor wing 75. As a result, stalk blockage before and after the conveyor wing 75 can be prevented, the efficiency of the threshing process can be further improved, and threshing residue caused by poor threshing can be prevented more reliably.

[0162] Next, using Figures 11 to 14 The threshing cylinder 80 with a connecting part 84 in other configurations will be described. Furthermore, the reference numerals for the components described below are the same as those used in the threshing cylinder 40, except for the modified parts.

[0163] like Figure 11 , Figure 12 As shown, regarding the threshing cylinder 80, the rotating shaft 41 is also supported on the aforementioned frame 21, and a bevel gear 51 is provided at the front of the rotating shaft 41. By means of the bevel gear 51 and the power of the engine, the rotating shaft 41 is rotated clockwise in the main view, thereby driving the threshing cylinder 80 to rotate.

[0164] A rake portion 76 is integrally provided at the front of the rotating shaft 41, which is a structure in which a spiral wing 76b is externally embedded in a conical body portion 76a. The rake portion 76 forms part of the threshing cylinder 80 and guides the ear stalks conveyed by the aforementioned feeder 30 to the threshing teeth 20 of the threshing cylinder 80.

[0165] A circular front panel 77 and a rear panel 78 are respectively provided near the front and rear ends of the rotating shaft 41, wherein the front panel is integrated with the rake portion 76.

[0166] Moreover, similar to the aforementioned embodiments, the front panel 77 and the rear panel 78 are connected by a dodecagonal square tube-shaped shielding member 79, which covers the area around the rotating shaft 41 of the threshing cylinder 80.

[0167] The main body 83 of the threshing cylinder 80 is formed by the aforementioned front and rear end panels 77 and 78 and the shielding member 79, and an internal space 81 is defined within the main body 83.

[0168] Within the internal space 81, four partition plates 82, which are orthogonal to the axial direction of the rotation axis 41, are also inserted at equal intervals in the front-back direction, thereby reinforcing the shielding component 79 from the inside and improving its rigidity.

[0169] The outer periphery of the partition plate 82 can abut against the inner periphery of the shielding member 79, and a shaft hole 82a for the rotating shaft 41 to be inserted and fixed is provided through the center of the partition plate 82. The rotating shaft 41 is firmly connected to the main body 83 by means of the partition plate 82, so that the rotational force of the rotating shaft 41 can be reliably transmitted to the threshing cylinder 80.

[0170] Multiple connecting holes 82b are also provided around the shaft hole 82a, so that the partition plate 82 can be made lighter according to the opening amount, and the rotation speed of the threshing cylinder 80 can be increased and the threshing efficiency can be improved.

[0171] In addition, such as Figures 12 to 14 As shown, similar to the aforementioned shielding member 56, the shielding member 79 also has 12 vertex corner portions 79b and an outer peripheral plane portion 79c connecting them. The support rod 85 extends parallel to the axial direction of the rotation shaft 41 and is disposed on the outer peripheral plane portion 79c therein.

[0172] The support rod 85 is also formed into a square tube shape when viewed in cross-section, and is disposed on an outer peripheral plane portion 79c that is spaced one apart in the circumferential direction. Furthermore, the rod-shaped threshing teeth 20 protrude radially outward from its upper surface 85a.

[0173] Furthermore, on the same outer peripheral plane portion 79c as the support rod 85, as in the aforementioned embodiment, the aforementioned fixing bracket 59 is provided with a plurality of such brackets in the front-rear direction.

[0174] The thicker bracket base 59a at the bottom of the fixed bracket 59 is fastened to the outer peripheral plane 79c in a detachable manner by means of left and right bolts 60, 60. Furthermore, the front and rear bracket clamping parts 59b, 59c are erected from the front and rear ends of the bracket base 59a and are fused to the support rod 85.

[0175] Thus, the support rod 85 can be fixed to the outer peripheral plane 79c of the shielding member 79 by means of multiple fixing brackets 59.

[0176] Furthermore, the lower surface 85b of the support rod 85 supported by the fixed bracket 59 is also separated from the outer peripheral plane portion 79c according to the thickness of the bracket base portion 59a. Therefore, compared with the case where the support rod 85 is directly set on the outer peripheral plane portion 79c, the upper surface 85a of the support rod 85 is set at a higher position.

[0177] Furthermore, support holes 85a1 and 85b1 are provided at equal intervals along the entire length of the support rod 85 in the vertical direction when viewed from above, and the threshing teeth 20 are supported by the support holes 85a1 and 85b1 at two points above and below.

[0178] Furthermore, regarding the threshing cylinder 80 of this embodiment, only the high threshing region 86 held by the first and second partition plates 82, which in this embodiment is the front half of the high threshing region 86, is provided with a conveying wing 87 that conveys the processed material from the upstream side of the conveying cylinder 80 toward the downstream side of the conveying.

[0179] In addition, such as Figures 11 to 14 As shown, the conveying wing 88 constituting the conveying wing 87 is a droplet-shaped plate that extends circumferentially to the left when viewed from the front, disposed between adjacent support rods 85. A trapezoidal recess 88a1 that opens radially inward when viewed from the front is formed in the lower half of the wing base 88a. Furthermore, the wing base 88a is disposed on a support member 89 that has a shape such that the two circumferential ends of the rectangular plate that are longer in the front-rear direction bend downward.

[0180] The support member 89 has: a protrusion 89a disposed on the outer peripheral plane 79c of the shielding member 79 between adjacent support rods 85, and the top surface of which is higher than the upper surface 85a of the support rods 85; and left and right support legs 89b, 89b, which are located at the circumferential ends of the protrusion 89a and are mounted and fixed on the outer peripheral plane 56c of the shielding member 79.

[0181] The protrusion 89a protrudes radially outward from the circumferential center, and the conveying wing 88 can be fitted with the support member 89 by having the recess 88a1 of the aforementioned conveying wing 88 inserted from above.

[0182] This protrusion 89a includes: a top 89a1 having a flat top surface; and left and right inclined portions 89a2, 89a2 having inclined surfaces 95a, 95b extending outward from the circumferential ends of the top 89a1.

[0183] Regarding the support legs 89b, 89b, they are fastened to the outer peripheral plane 56c of the shielding member 79 by means of front and rear bolts 63. Therefore, the position of the support member 89 can be adjusted by changing the fastening connection position.

[0184] Therefore, by having the recess 88a1 of the aforementioned conveying wing 88 externally inserted into the protrusion 89a of the support member 89 from above, the conveying wing 88 can be positioned on the shielding member 79 in a manner that allows for position adjustment in the axial direction by means of the support member 89.

[0185] As described above, the threshing cylinder 80 includes a support member 89 in the connecting portion 91 for connecting the wing base 88a, which serves as the base of the conveying wing 88, to the shielding member 79.

[0186] In addition, such as Figures 12 to 14 As shown, a wide groove 90 is formed by the inclined portion 89a2 / leg portion 89b of the aforementioned support member 89, the outer peripheral plane portion 79c of the shielding member 79, and the side surface 85c of the support rod 85.

[0187] Moreover, as mentioned above, the top surface of the protrusion 89a of the support member 89 is at a higher position than the upper surface 85a of the support rod 85. Therefore, the closer to the support member 89, the greater the radial depth D1 of the wide groove 90.

[0188] Here, as mentioned above, the lower surface 85b of the support rod 85 is separated from the thickness h1 of the bracket base 59a of the fixed bracket 59 from the outer peripheral plane portion 79c. As a result, the upper surface 85a of the support rod 85 is higher than that of the case where the support rod 85 is directly mounted on the outer peripheral plane portion 79c.

[0189] Therefore, similar to the aforementioned embodiment, compared to the case where the support rod 85 is directly provided on the outer peripheral plane portion 79c, the radial depth D1 of the wide groove 90 can be set to be greater than the radial thickness hb of the support rod 85 by the sum of the thickness h1 of the fixed bracket 59 and the amount by which the top surface of the protrusion 89a of the support member 89 is higher than the upper surface 85a of the support rod 85. As a result, the capacity of the processed material in the wide groove 90 can be increased, and the amount of processed material released toward the threshing receiving portion can be increased.

[0190] Furthermore, similar to the aforementioned embodiments, the aforementioned inclined surfaces 95a and 95b, which have a slope that extends outward in a circumferential direction, function as striking surfaces for extruding the workpiece held in the wide groove 90 radially outward.

[0191] Furthermore, the aforementioned support member 89 has a release structure 92 that uses the inclined surfaces 65a and 65b, which serve as the striking surface, to expel the processed material that moves between adjacent support rods 85 radially outward.

[0192] That is, the connecting part 91 is provided with a support member 89, which has: a protrusion 89a that is fitted into a recess 88a1 of a wing base 88a, which serves as the base of the conveyor wing 87, and the top surface of the protrusion 89a is at a higher position than the upper surface 85a of the support rod 85; and support legs 89b, 89b, which are located at the circumferential ends of the protrusion 89a and are mounted and fixed on the shielding member 79. The conveyor wing 87 is configured to be adjustable in the axial direction using the support member 89. In this case, the position of the conveyor wing 87 can be freely adjusted simply by changing the fixed position of the support member 89 on the shielding member 79. As a result, a high degree of design freedom can be obtained without reconsidering the structure, and manufacturing costs can be reduced while maintainability can be improved.

[0193] When the support member 89 has circumferentially outwardly extending inclined surfaces 95a and 95b in the protrusion 89a and is configured with a release structure 92 that uses the inclined surfaces 95a and 95b as striking surfaces, the radial depth D1 of the wide groove 90 formed by the inclined portion 89a2 / leg portion 89b of the support member 89, the outer peripheral plane portion 79c of the shielding member 79, the side surface 85c of the support rod 85, etc., is the depth from the upper surface of the protrusion 89a, which is at a position higher than the upper surface 85a of the support rod 85, to the upper surface of the leg portion 89b, and is greater than the radial thickness hb of the support rod 85. Moreover, the circumferentially outwardly extending inclined surfaces 95a and 95b of the support member 89, which freely adjusts the position of the conveyor wing 87, are set as striking surfaces.

[0194] Therefore, by increasing the impact area of ​​the impact surface that strikes the workpiece and by making the impact direction more radial, it is also possible to easily make fine adjustments to the impact position. The amount of workpiece released toward the threshing receiving part and the impact reaction force received from the threshing receiving part are further increased, which can more reliably prevent threshing residue from being generated due to reduced threshing efficiency.

[0195] In addition, such as Figure 12 , Figure 13As shown, in front of the aforementioned support member 89 and the conveying blade 88, support plates 93, which serve as plates for supporting the second threshing tooth 94, are arranged in parallel. Furthermore, the positions of the conveying blade 88 and the support plates 93 can be interchanged, and in this embodiment, the arrangement is changed according to the required threshing action.

[0196] The support piece 93 is L-shaped when viewed from the front. A corner portion 93a1 is formed on the support base 93a in the lower half of the support piece 93. The corner portion 93a1 is fitted into one side of the protrusion 89a of the support member 89, which is the corner portion 89c on the right side when viewed from the front in this embodiment, and is fixed by welding or the like.

[0197] The second threshing tooth 94 supported by this is an arrowhead shape that becomes sharper towards the top when viewed from the front, and is fastened to the front and rear sides of the support plate 93, or the rear surface in this embodiment, by means of upper and lower bolts 96, 96.

[0198] Similarly, the second threshing tooth 94 is also fastened to the rear surface of the conveying vane 88 by means of upper and lower bolts 96, 96.

[0199] As described above, the support rod 85 that supports the threshing tooth 20 and the support piece 93 that supports the second threshing tooth 94 are both mounted on the outer peripheral plane portion 79c of the shielding member 79 by means of the support member 89.

[0200] Furthermore, the tip 94a of any second threshing tooth 94 passes through the rotation trajectory 41a of the outer end 20a of the aforementioned threshing tooth 20, and the radial height of the second threshing tooth 94 is the same as that of the threshing tooth 20.

[0201] That is, when the conveyor wing 87 has a second threshing tooth 94, the number of threshing teeth can be increased accordingly to prolong the threshing time, or different types of threshing teeth can be used for the two types of threshing teeth, such as rod-shaped threshing teeth 20 and slice-shaped second threshing teeth 94 in this embodiment, to adjust the threshing effect. Therefore, the threshing performance of the threshing teeth 20 and 94 can be freely adjusted according to various conditions such as the variety / growth status of the threshing object, temperature / humidity, and other threshing operating environments, further improving the efficiency of the threshing process and preventing threshing residue due to poor threshing.

[0202] When the radial height of the second threshing tooth 94 is set to be the same as that of the threshing tooth 20, it can prevent uneven threshing action and severe wear of specific threshing teeth caused by different radial heights of the two threshing teeth 20 and 94, or the impact / winding / stretching of the threshing teeth 20 and 94 concentrated on specific stalks, causing blockage of the threshing cylinder and preventing smooth rotation. It can extend the service life of components, reduce manufacturing costs, improve maintainability, and further improve the efficiency of threshing processing, and more reliably prevent threshing residue caused by poor threshing.

[0203] The shielding member 79 is polygonal in cross-section. The support rod 85 supporting the threshing tooth 20 and the support member 89 supporting the second threshing tooth 94 are both mounted on the outer peripheral plane 79c of the polygon. In this configuration, both the support rod 85 and the support member 89 can ensure a large mounting area on the outer peripheral plane 79c, thus firmly supporting the threshing tooth 20 / second threshing tooth 94. Even if a large load is applied to the threshing tooth 20 / second threshing tooth 94 during threshing due to loads or impacts from the threshed material, it will not fall off. Therefore, it is possible to suppress the reduction in threshing efficiency and more reliably prevent threshing residue caused by poor threshing.

[0204] As described above, the combine harvester of the present invention has the following threshing cylinder: for the workpiece processed by the threshing cylinder with conveying wings, the efficiency of threshing can be improved without setting new structures or reducing the degree of design freedom, and the threshing residue caused by poor threshing can be prevented.

[0205] Furthermore, while the present invention has been described through the above embodiments, it is not limited thereto. Additionally, the effects described above are merely examples of the optimal effects produced by the present invention, and the effects of the present invention are not limited to those described in this embodiment.

[0206] For example, the present invention can be implemented in the following manner.

[0207] (1) A combine harvester, comprising:

[0208] A shielding component that covers the area around the rotation axis of the threshing cylinder, which is rotatably supported in the threshing chamber, and together with the front and rear end panels of the threshing cylinder, delineates the interior space.

[0209] A support rod extends parallel to the axis of rotation on the shielding member, and rod-shaped threshing teeth protrude radially outward from the upper surface of the support rod; and

[0210] A conveyor wing, disposed between adjacent support rods, conveys the workpiece from the upstream side of the threshing cylinder toward the downstream side.

[0211] Its features are,

[0212] The threshing cylinder is provided with a connecting part for connecting the base of the conveying wing to the shielding component.

[0213] The connecting part has the following release structure: it has a striking surface with a radial depth greater than the radial thickness of the support rod and an outwardly circumferentially inclined slope, and the object to be processed that moves between adjacent support rods is squeezed outwardly by the striking surface.

[0214] (2) The combine harvester according to technical solution 1, characterized in that,

[0215] The connecting part has:

[0216] A threshing tooth frame, which is mounted and fixed on the support rod and connected to the shielding member, wherein the threshing teeth protrude radially outward from the upper surface of the threshing tooth frame; and

[0217] A reinforcing member is provided, the base of which is fixed to the circumferential center of the conveyor wing, and the reinforcing member is connected to the shielding member.

[0218] The reinforcing component is bridged between the threshing tooth frames on adjacent support rods.

[0219] (3) The combine harvester according to technical solution 2, characterized in that,

[0220] The bottom, which is fixed to the shielding member between adjacent support rods; and

[0221] The sidewall portion, which extends from the bottom to the upper surface of the threshing tooth frame, has an inclined surface that extends circumferentially outward.

[0222] The reinforcing member constitutes a release structure that uses the inclined surface as the striking surface.

[0223] (4) The combine harvester according to any one of technical solutions 1 to 3, characterized in that,

[0224] The conveying wing consists of a plurality of conveying blades arranged at predetermined intervals in the circumferential direction of the threshing cylinder.

[0225] (5) The combine harvester according to any one of technical solutions 1 to 4, characterized in that,

[0226] Regarding the conveying wing, the conveying blades corresponding to the beginning and end of the conveying wing are connected to the threshing teeth.

[0227] (6) The combine harvester according to any one of technical solutions 1 to 5, characterized in that,

[0228] The conveying wing is only located on the upstream side of the threshing cylinder.

[0229] (7) The combine harvester according to technical solution 1, characterized in that,

[0230] The connecting portion includes a support member having: a protrusion that engages with a recess at the base of the conveyor wing, and a top surface that is higher than the upper surface of the support rod; and legs located at both circumferential ends of the protrusion and mounted and fixed to the shielding member.

[0231] The support component is used to configure the conveyor wing so that its position can be adjusted in the axial direction.

[0232] (8) The combine harvester according to technical solution 7, characterized in that,

[0233] The support member has an inclined surface that extends outward in a circumferential direction in the protrusion, and is configured to release the inclined surface as the striking surface.

[0234] (9) The combine harvester according to technical solution 7 or technical solution 8, characterized in that,

[0235] The conveyor wing has a second threshing tooth.

[0236] (10) The combine harvester according to technical solution 9, characterized in that,

[0237] The radial height of the second threshing tooth is the same as that of the threshing tooth.

[0238] (11) The combine harvester according to technical solution 9 or technical solution 10, characterized in that,

[0239] The shielding component is polygonal in cross-section, and the support rod supporting the threshing tooth and the support component supporting the second threshing tooth are both mounted on the outer peripheral plane of the polygon.

Claims

1. A combine harvester, comprising: A shielding component that covers the area around the rotation axis of the threshing cylinder, which is rotatably supported in the threshing chamber, and together with the front and rear end panels of the threshing cylinder, delineates the interior space. A support rod extends parallel to the axis of rotation on the shielding member, and rod-shaped threshing teeth protrude radially outward from the upper surface of the support rod; and A conveyor wing, disposed between adjacent support rods, conveys the workpiece from the upstream side of the threshing cylinder toward the downstream side. Its features are, The threshing cylinder is provided with a connecting part for connecting the base of the conveying wing to the shielding component. The connecting part has the following release structure: it has a striking surface with a radial depth greater than the radial thickness of the support rod and an outwardly circumferentially inclined slope, and the processed object moving between adjacent support rods is squeezed outwardly by the striking surface.

2. The combine harvester according to claim 1, characterized in that, The connecting portion has: A threshing tooth frame, which is mounted and fixed on the support rod and connected to the shielding member, wherein the threshing teeth protrude radially outward from the upper surface of the threshing tooth frame; as well as A reinforcing member is provided, the base of which is fixed to the circumferential center of the conveyor wing, and the reinforcing member is connected to the shielding member. The reinforcing component is bridged between the threshing tooth frames on adjacent support rods.

3. The combine harvester according to claim 2, characterized in that, The reinforcing component includes: The bottom, which is fixed to the shielding member between adjacent support rods; and The sidewall portion, which extends from the bottom to the upper surface of the threshing tooth frame, has an inclined surface that extends circumferentially outward. The reinforcing member constitutes a release structure that uses the inclined surface as the striking surface.

4. The combine harvester according to any one of claims 1 to 3, characterized in that, The conveying wing consists of a plurality of conveying blades arranged at predetermined intervals in the circumferential direction of the threshing cylinder.

5. The combine harvester according to claim 4, characterized in that, Regarding the conveying wing, the conveying blades corresponding to the beginning and end of the conveying wing are connected to the threshing teeth.

6. The combine harvester according to claim 4, characterized in that, The conveying wing is only located on the upstream side of the threshing cylinder.

7. The combine harvester according to claim 1, characterized in that, The connecting portion includes a support member having: a protrusion that engages with a recess at the base of the conveyor wing, and the top surface of which is positioned higher than the upper surface of the support rod; and support legs located at both circumferential ends of the protrusion and mounted and fixed to the shielding member. The support component is used to configure the conveyor wing so that its position can be adjusted in the axial direction.

8. The combine harvester according to claim 7, characterized in that, The support member has an inclined surface that extends outward in a circumferential direction in the protrusion, and is configured to release the inclined surface as the striking surface.

9. The combine harvester according to claim 8, characterized in that, The conveyor wing has a second threshing tooth.

10. The combine harvester according to claim 9, characterized in that, The radial height of the second threshing tooth is the same as that of the threshing tooth.

11. The combine harvester according to claim 9 or claim 10, characterized in that, The shielding component is polygonal in cross-section, and the support rod supporting the threshing tooth and the support component supporting the second threshing tooth are both mounted on the outer peripheral plane of the polygon.

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