Combine harvester

Abstract

The invention provides a combine harvester, which is provided with a raking auger used for raking cut crops to a supply conveying device, and can improve the crop collecting performance of the raking auger. The raking auger used for raking the feeding and conveying device is provided with an auger main body part (241); the spiral blade part (242) is arranged on the outer peripheral surface (241a) of the auger main body part (241); and a plurality of raking fingers (240) as a row of raking fingers arranged so that the position in the circumferential direction of the outer circumferential surface (241a) is common, the plurality of raking fingers (240) positioned in front of the feeding and conveying device comprising: a first row of fingers (301) comprising four raking fingers (240); and a second finger row (302) composed of three raking fingers (240), the first finger row (301) and the second finger row (302) are alternately arranged in the circumferential direction, and the dimension [Delta] K1 of the interval between adjacent raking fingers (240) in the direction of the rotation axis is set to be constant or substantially constant.

Description

Technical Field

[0001] The present invention relates to a combine harvester provided with a raking auger for raking harvested crops toward a supply and conveying device. Background Art

[0002] Conventionally, there are combine harvesters that include a raking auger for raking the harvested crops toward the supply conveyor, located in front of a supply conveyor that transports crops harvested from a harvesting section to a threshing section. A known raking auger includes a cylindrical auger body with a left-right axis of rotation; a spiral blade portion provided on the outer circumference of the auger body; and raking fingers, which are a plurality of rod-shaped portions protruding from the outer circumference of the auger body (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a structure in which a plurality of raking fingers located in front of a supply conveyor device among a plurality of raking fingers are arranged in a spiral shape along the spiral shape of a blade portion.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2023-62585 Summary of the Invention

[0007] In the structure equipped with a raking and gathering auger, the conveying action of the raking and gathering auger with blades gathers the harvested stalks from the left and right sides toward the center (the receiving port of the supply and conveying device). The stalks gathered toward the center of the raking and gathering auger are changed from their upright state before harvesting by the action of the raking fingers and the like, and are then collected into the supply and conveying device.

[0008] Regarding the structure for collecting the stalks using this type of raking auger, for example, when the crop to be harvested is wheat, that is, when harvesting wheat, the amount of stalks is large, and therefore, the stalks may not be sufficiently affected by the raking fingers, etc., which cause the stalks to change their posture. The insufficient change in the posture of the stalks caused by the raking fingers, etc., causes the raking auger to reduce its ability to collect the stalks.

[0009] The present invention has been made in view of the above-mentioned problems, and its object is to provide a combine harvester having a structure of a raking auger for raking the cut crops to a supply and conveying device, which can improve the harvesting performance of the raking auger on the crops.

[0010] The combine harvester involved in the present invention comprises: a supply and conveying device, which is arranged in front of the threshing part; and a raking auger, which is arranged in front of the supply and conveying device and is used to rake the crops toward the supply and conveying device, wherein the raking auger has: a cylindrical auger main body, which sets the left and right directions of the body as the direction of the rotation axis; a spiral blade part, which is arranged on the outer peripheral surface of the auger main body and applies a conveying effect in the direction of the rotation axis to the crops; and a plurality of raking fingers, which protrude from the outer peripheral surface as the The plurality of raking fingers are arranged in a common position in the circumferential direction of the outer peripheral surface, and the plurality of raking fingers among the plurality of raking fingers located in front of the supply and conveying device include: a first finger column, which is composed of a first number of the raking fingers; and a second finger column, which is composed of a second number of the raking fingers which is less than the first number. The first finger column and the second finger column are alternately arranged in the circumferential direction, and the interval between the adjacent raking fingers in the direction of the rotation axis is set to be constant or approximately constant.

[0011] The combine harvester involved in other embodiments of the present invention is based on the above-mentioned combine harvester, and the blade portion is arranged so that the interval between the end portion of the blade portion in the conveying direction and the raking finger-like member arranged at a position closest to the end portion is formed to be the same or approximately the same size as the interval between the raking finger-like members.

[0012] In a combine harvester according to another aspect of the present invention, in the above-described combine harvester, a plurality of the gathering fingers located in front of the supply conveyor device among the plurality of gathering fingers are arranged in a staggered pattern.

[0013] In a combine harvester according to another aspect of the present invention, in the above-described combine harvester, the first number is four and the second number is three.

[0014] In a combine harvester according to another aspect of the present invention, in the above-described combine harvester, the blade portion includes a plurality of blade configuration portions having different inclination angles with respect to the circumferential direction.

[0015] A combine according to another aspect of the present invention is the above-described combine, wherein the blade portion includes, as the blade configuration portion, a terminal blade configuration portion constituting a portion on a terminal side in a conveyance direction of the blade portion.

[0016] In the combine harvester according to another aspect of the present invention, in the above-described combine harvester, the tip blade configuration portion is a portion having a larger inclination angle than the other blade configuration portions.

[0017] The combine harvester involved in other embodiments of the present invention is based on the combine harvester, and the harrowing auger has as the blade part: a right blade part, which is arranged on the right side of the auger main body and sets the direction of the conveying action to the left; and a left blade part, which is arranged on the left side of the auger main body and sets the direction of the conveying action to the right.

[0018] A combine harvester according to another aspect of the present invention is the above-described combine harvester, wherein the right blade portion and the left blade portion are arranged so as to have phases in the circumferential direction different from each other.

[0019] In a combine harvester according to another aspect of the present invention, in the above-described combine harvester, at least one of the plurality of gathering fingers is disposed on an extension line of a distal end portion in a conveyance direction of the blade portion.

[0020] In a combine harvester according to another aspect of the present invention, in the above-described combine harvester, the first number is three and the second number is two.

[0021] Effects of the Invention

[0022] According to the present invention, the structure including the raking and gathering auger for raking the cut crops toward the supply and conveying device can improve the crop collecting performance of the raking and gathering auger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a left side view of the combine harvester according to the first embodiment of the present invention.

[0024] Figure 2 It is a right side view of the combine harvester which concerns on 1st Embodiment of this invention.

[0025] Figure 3 It is a top view of the combine harvester according to the first embodiment of the present invention.

[0026] Figure 4 It is a figure which shows the power transmission structure of the combine harvester which concerns on 1st Embodiment of this invention.

[0027] Figure 5 This is a front perspective view of the cutting portion according to the first embodiment of the present invention.

[0028] Figure 6 It is a top view of the raking auger according to the first embodiment of the present invention.

[0029] Figure 7 It is a cross-sectional view of the raking auger according to the first embodiment of the present invention.

[0030] Figure 8 It is a plan view showing the internal structure of the raking auger according to the first embodiment of the present invention.

[0031] Figure 9 It is a development view of the raking and gathering auger schematically showing the structure of the raking and gathering auger according to the first embodiment of the present invention.

[0032] Figure 10 It is a development view of the raking and gathering auger schematically showing the structure of the raking and gathering auger according to the first embodiment of the present invention.

[0033] Figure 11 It is a development view of a raking and gathering auger schematically showing the structure of the raking and gathering auger according to the second embodiment of the present invention.

[0034] Figure 12 It is a development view of a raking and gathering auger schematically showing the structure of the raking and gathering auger according to the second embodiment of the present invention.

[0035] Description of Reference Numerals

[0036] 1 Combine Harvester

[0037] 7 Threshing Department

[0038] 30 Feeder (supply conveyor)

[0039] 37 Raking Auger

[0040] 240 Raking fingers

[0041] 241 Auger main body

[0042] 241a outer surface

[0043] 242 blade

[0044] 242a terminal end

[0045] 242b end

[0046] 242R right blade

[0047] 242L left blade

[0048] 301 first finger row

[0049] 302 second finger row

[0050] 401 First finger row

[0051] 402 Second finger row

[0052] 450 blade structure

[0053] 451 Main blade structure (blade structure)

[0054] 452 terminal blade structure (blade structure)

[0055] N1 extension cable DETAILED DESCRIPTION

[0056] The present invention is directed to a structure of a raking auger for raking harvested crops to a supply and conveying device, and aims to achieve good crop collection performance by the raking auger.

[0057] [First embodiment]

[0058] use Figures 1 to 5 The overall structure of the combine harvester 1 according to the first embodiment of the present invention will be described. In the following description, the left side ( Figure 3 The lower side) and right side ( Figure 3 The upper side) is set as the left side and the right side of the combine harvester 1 respectively.

[0059] like Figure 1 and Figure 2 As shown, the combine harvester 1 according to this embodiment is a conventional combine harvester capable of raking harvested crops (rice, wheat, soybeans, corn, etc.) into the machine body, threshing, sorting, and storing the grains, and then appropriately discharging the harvested crops outside the machine. The combine harvester 1 comprises a traveling body 2 capable of autonomous travel, and a harvesting unit 3 disposed at the front end of the traveling body 2. The harvesting unit 3 is configured as a harvesting device that harvests and collects the unharvested stalks of rice, wheat, etc., and is mounted so that it can be raised and lowered relative to the traveling body 2.

[0060] The traveling body 2 includes a traveling unit 4 configured as a crawler-type traveling device having a pair of left and right crawler units 5, 5. A body frame 6 is provided above the crawler units 5, 5. Each crawler unit 5 includes a plurality of rotating bodies, each including a drive sprocket 5a provided at its front end, and crawler belts 5c wound around the rotating bodies. The drive sprocket 5a is driven to rotate by receiving power from the engine 25 included in the combine harvester 1.

[0061] On the left side of the machine frame 6 are provided a threshing section 7 for threshing the stalks harvested and supplied by the harvesting section 3, and a screening section 8 for screening the grains threshed by the threshing section 7. The threshing section 7 and the screening section 8 are arranged so that the threshing section 7 is on the upper layer and the screening section 8 is on the lower layer.

[0062] A grain storage section 9 is provided on the machine frame 6 to the right of the threshing section 7 and the screening section 8. The grain storage section 9 includes a grain tank 10 for storing the grains (fine grains) screened by the screening section 8. A lower discharge conveyor 11 (see FIG. 1 ) is provided in the grain tank 10 for conveying the stored grains toward the discharge port of the grain tank 10. Figure 4 The longitudinal conveyor 12 is vertically connected to the discharge port of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end of the longitudinal conveyor 12. The grain discharge conveyor 13 is configured to be able to turn in the horizontal direction and to swing up and down around a horizontal axis. The grain in the grain tank 10 is conveyed by the above conveyor and discharged from the rice inlet 14 provided at the front end of the grain discharge conveyor 13 into the cargo box of a truck, a container, etc.

[0063] A driving section 15 for the operator to ride is provided on the machine frame 6 in front of the grain storage section 9, that is, on the right front of the machine frame 6. The driving section 15 is covered by a cab 16. The driving section 15 is provided with a driver's seat 17, a steering wheel 18, which is arranged in front of the driver's seat 17, and various operating parts such as a main gear lever 19, a sub-gear lever, and a clutch lever (see FIG. Figure 2 The operation clutch lever is used to operate the threshing clutch 57 and the harvesting clutch 75 (see Figure 4 ) operating parts for engaging and disconnecting operations.

[0064] An engine 25 serving as a driving source is provided below the cab 15 on the machine frame 6. The engine 25 is provided in a space on the right side of the front portion of the machine frame 6, utilizing the space below the cab 15. The engine 25 is, for example, a diesel engine.

[0065] The harvesting section 3 is described. The harvesting section 3 includes a feeder 30 as a supply and conveying device, a platform 31 as a grain harvesting platform, a cutter device 32, a pair of left and right grain dividers 33, 33, and a raking and pulling wheel 34. Figure 5 For the sake of convenience, the illustration of the raking reel 34 is omitted.

[0066] The feeder 30 conveys the stalks harvested by the harvesting section 3 and supplies them to the threshing section 7. The feeder 30 includes a feeding chamber 35 as a housing and a conveyor 36 for conveying the stalks (see FIG. Figure 4 ) is located in the feeding chamber 35. The feeding chamber 35 is configured as a substantially quadrangular tube with its longitudinal direction as the front-to-back direction when viewed from above. The feeder 30 is located on the left side of the cab 16 and is arranged so that the rear end opening of the feeding chamber 35 communicates with the threshing port 7a on the front side of the threshing unit 7.

[0067] The conveyor 36 is a chain conveyor having the following components: chains 95 arranged parallel to each other on the left and right sides of the feed chamber 35; and a plurality of slats 96 arranged between the left and right chains 95 (see FIG. Figure 4 The conveyor 36 has a harvesting section input shaft (feeding chamber conveyor shaft) 38 provided at the front of the threshing section 7 and having the left-right direction as the axial direction, as a drive shaft supporting the conveying end side of the conveyor 36. The conveyor 36 winds the rear side portion of the chain 95 around a sprocket 97 fixedly provided on the harvesting section input shaft 38.

[0068] Meanwhile, the front portion of the chain 95 is wound around a cylindrical front roller 98 installed at the front end of the feed chamber 35. The front roller 98 is rotatably supported about a conveyor driven shaft 98a, a rotation axis supported between the left and right side surfaces of the feed chamber 35. Specifically, the chain 95 is wound in an endless loop around the sprocket 97 and the front roller 98. The rotation of the sprocket 97, accompanied by the rotation of the cutting unit input shaft 38, drives the chain 95 so that the slats 96 can be moved while maintaining the chain in a wound state.

[0069] The rear end of the feeder 30 is supported so as to be rotatable relative to the traveling machine body 2 with the cutting unit input shaft 38 as a rotation axis. In addition, a lifting cylinder 39 (see FIG. 1 ) as a hydraulic cylinder is provided between the lower surface of the feed chamber 35 and the machine frame 6. Figure 1 ).

[0070] The harvesting unit 3 is configured to be raised and lowered by the rotation of the feeder 30 relative to the traveling body 2 accompanied by the extension and retraction of the lifting cylinder 39. The lifting and lowering of the harvesting unit 3 causes the harvesting unit 3 to be raised and lowered about the harvesting unit input shaft 38 as a rotation support axis, thereby adjusting the height of the harvesting unit 3. The lifting and lowering of the harvesting unit 3 is controlled by a predetermined operating unit provided on the driving unit 15.

[0071] The platform 31 is formed in a horizontally long hopper shape and is connected to the front side of the feeder 30 so as to communicate with the front end opening of the feed chamber 35. The platform 31 has a left wall 201 and a right wall 202, a rear wall 203, and a bottom 204. As a space for feeding the stalks, a space with an open front and upper side is formed.

[0072] The rear wall portion 203 includes: a transverse frame portion 203a, which is formed of a square tube-shaped member and constitutes the upper edge of the rear wall portion 203; and a rear wall surface portion 203b, which is provided on the lower side of the transverse frame portion 203a (see Figure 5 A receiving port 205 is formed on the rear wall portion 203 and is open to the front end opening of the feed chamber 35. The receiving port 205 has a rectangular opening shape corresponding to the shape of the front end opening of the feed chamber 35.

[0073] The feed chamber 35 is provided at a position further to the left than the center in the left-right direction relative to the platform 31, and the receiving port 205 is provided further to the left than the center in the left-right direction and opens into the platform 31. Specifically, the receiving port 205 is provided so as to open to a range substantially equal to the second range from the left after the rear wall portion 203 is divided into four equal parts in the left-right direction.

[0074] A raking auger (platform auger) 37 is installed within the platform 31. The raking auger 37 is rotatably mounted between the left and right side walls 201 and 202 of the platform 31, with the left and right sides of the raking auger 37 being pivotally supported by the left and right side walls 201 and 202, respectively.

[0075] The cutting blade device 32 is provided at the front lower end edge of the platform 31 and is configured in the shape of a clipper. A pair of left and right grain dividers 33, 33 are provided so as to protrude forward from the left and right side portions of the front side of the platform 31. The raking and gathering wheel 34 is a grain wheel with a tine beam and is provided at a position above and in front of the raking and gathering auger 37. The raking and gathering wheel 34 is supported between the front ends of a pair of left and right grain wheel support arms 34a, 34a whose base ends are supported on the platform 31 so as to be rotatable with the left and right directions as the rotation axis directions. The raking and gathering wheel 34 continuously acts on the pod-bearing portion of the ear stalk while rotating, and rakes the pod-bearing portion of the ear stalk toward the raking and gathering auger 37. The power of the engine 25 transmitted by various transmission mechanisms is used for the operation of each part of the cutting section 3.

[0076] The front rotor 26 is provided at the rear side of the feeder 30 to feed the stalks conveyed by the conveyor 36 to the threshing port 7a. The front rotor 26 is provided between the end of the conveyor 36 and the threshing port 7a. The front rotor 26 comprises a substantially cylindrical rotor body 27, which is also called a threshing drum, etc., and a front rotor shaft 28 (see FIG. Figure 4 The ear stalks fed by the feeder 30 are fed from the end of the conveyor 36 via the front rotor 26 from the threshing port 7a into the threshing chamber 7b of the threshing unit 7.

[0077] The threshing unit 7 and the screening unit 8 are described. The threshing unit 7 includes a threshing drum 40 provided in a threshing chamber 7b with a threshing opening 7a opened to the front, and a receiving net 42 disposed below the threshing drum 40. The threshing chamber 7b is formed by a machine frame provided on the machine frame 6.

[0078] The threshing drum 40 is provided with a threshing drum shaft 41 (see Figure 4) and is supported so as to be rotatable. Multiple dust valves are provided on the upper side of the threshing drum 40 in an angle-adjustable manner for adjusting the conveying speed (retention time) of the threshed material in the threshing chamber. The receiving net 42 allows the grains to leak downward and is provided along the outer peripheral surface of the lower portion of the threshing drum 40.

[0079] The screening section 8 comprises: a swinging screening plate 43 as a swinging section, which is arranged below the receiving net 42; a swinging mechanism 44, which swings the swinging screening plate 43 using the rotational power from the driving source; a first-grade product conveyor 45; a second-grade product conveyor 46; and a winnowing machine 47 (see Figure 4 ). In addition, if Figure 4 As shown, a preliminary fan 71 is provided in front of the winnowing machine 47 , and a second fan 72 is provided behind the winnowing machine 47 .

[0080] The swinging screening tray 43 comprises a feed tray, a coarse screen behind the feed tray that adjusts grain leakage, and a grain screen below the coarse screen, all designed for specific gravity screening. A first-grade conveyor 45 is positioned within a first-grade guide trough extending across the width of the machine body, allowing first-grade grains to converge. A second-grade conveyor 46 is positioned behind the first-grade conveyor 45 within a second-grade guide trough extending across the width of the machine body, allowing second-grade grains to converge. A winnowing machine 47 delivers screening air, discharged from the lower front to the upper rear, to the swinging screening tray 43.

[0081] A reduction conveyor 48 is provided on the right side of the machine body where the threshing unit 7 and the screening unit 8 are arranged (see Figure 4 The lower end of the reduction conveyor 48 is located near the second-grade product conveyor 46 and is connected to the second-grade product conveyor 46. The upper end of the reduction conveyor 48 is located near the front end of the threshing drum 40 and extends in an inclined shape toward the front and upper part. A winnowing conveyor 49 is provided on the right side of the reduction conveyor 48 and extends in the vertical direction. The winnowing conveyor 49 conveys the first-grade product conveyed by the first-grade product conveyor 45 into the grain box 10.

[0082] The combine harvester 1 having the above-described structure is operated in a field. By raising and lowering the feeder 30 about the harvester input shaft 38 as a center (support shaft), the harvester 3 is raised relative to the ground to a desired height (the height for cutting the stalks of the crop to be harvested), thereby switching from a non-operating state to an operating state. In this state, the combine harvester 1 travels using the travel body 2. Thus, the combine harvester 1 uses the left and right grain dividers 33, 33 to divide the crop into the crop to be harvested and the crop not to be harvested. The combine harvester 1 uses the rake wheels 34 to rake the pod-bearing portion of the stalks of the crop to be harvested on the ear tip side, while the cutter device 32 cuts the pod-bearing portion of the stalks.

[0083] The pod-bearing portion of the stalks harvested at the desired harvesting position is raked into the platform 31 by the rotary-driven raking auger 37. The stalks raked into the platform 31 are collected near the collection port 205 in the platform 31 by the conveying action of the raking auger 37 and collected from the collection port 205 into the feed chamber 35. The stalks collected into the feed chamber 35 are passed through the feed chamber 35 by the conveyor 36 and fed into the threshing port 7a by the front rotor 26, thereby being supplied to the threshing section 7.

[0084] The pod-bearing portion of the stalks supplied to the threshing section 7 is threshed by the threshing section 7. Specifically, the stalks supplied to the threshing section 7 are conveyed rearward by the rotating threshing drum 40 while threshing is primarily performed between the threshing drum 40 and the receiving net 42. Grains and other threshed materials that are smaller than the mesh size of the receiving net 42 leak downward from the receiving net 42. Straw scraps and other materials that do not leak downward from the receiving net 42 are conveyed by the threshing drum 40 and discharged into the field through a dust discharge port located at the rear of the screening section 8.

[0085] On the other hand, the screening section 8 screens the grains threshed in the threshing section 7 and leaking downward from the receiving net 42. Specifically, the threshed material threshed in the threshing drum 40 and leaking downward from the receiving net 42 is screened by the specific gravity screening action of the swinging screening plate 43 and the wind-powered screening action of the winnowing machine 47 into grains such as fine grains (first-class), a mixture of grains such as grains with branches and stalks and straw (second-class), and straw chips, and these are removed.

[0086] Grains (first-grade grain) that fall from the swinging screening disc 43 after screening in the screening unit 8 are conveyed to the grain tank 10 by the first-grade grain conveyor 45 and the connected winnowing conveyor 49. The second-grade grain is returned to the threshing starting point of the threshing drum 40 by the second-grade grain conveyor 46 and the connected return conveyor 48, where it undergoes further threshing. Straw scraps and the like are discharged to the field through a dust discharge port located at the rear of the screening unit 8.

[0087] Next, use Figure 4 The power transmission structure of the combine harvester 1 according to this embodiment will be described. The combine harvester 1 drives the harvesting section 3, the traveling section 4, the threshing section 7, the sorting section 8, and the grain storage section 9 using the rotational power of the engine 25.

[0088] The engine 25 has a first output shaft 25a and a second output shaft 25b. The rotational power of the first output shaft 25a is transmitted to the traveling section 4, the threshing section 7, the screening section 8, and the harvesting section 3. The rotational power of the second output shaft 25b is transmitted to the grain storage section 9. The engine 25 also has a working machine pump shaft that drives the charge pump 54 that operates the lifting cylinder 39 and other components.

[0089] Regarding the power transmission system for the traveling section 4, the rotational power of the first output shaft 25a is transmitted to the HST input shaft 52 via the first belt transmission mechanism 51, and then input into the transmission 53, which includes both the traveling HST and the turning HST. Here, "HST" refers to a hydraulic continuously variable transmission that uses a hydraulic motor to convert the hydraulic pressure generated by a hydraulic pump into rotational force. The driving force from the transmission 53 drives and rotates the drive sprocket 5a of the crawler track 5 that constitutes the traveling section 4.

[0090] Regarding the power transmission system for the threshing unit 7, the rotational power of the first output shaft 25a is transmitted to the threshing unit input shaft 56 via the second belt transmission mechanism 55. The second belt transmission mechanism 55 is provided with a threshing clutch 57 that transmits the rotational power of the first output shaft 25a to the threshing unit input shaft 56 arbitrarily and intermittently.

[0091] The rotational power of the threshing unit input shaft 56 is transmitted to the threshing drum input shaft 59 via the third belt transmission mechanism 58. The rotational power of the threshing drum input shaft 59 is transmitted to the threshing drum shaft 41 via the threshing speed change device 60. The threshing speed change device 60 performs a speed change of two levels, for example, high speed and low speed, for the rotational power input from the threshing drum input shaft 59 to the threshing drum shaft 41.

[0092] According to this structure, the driving force of the engine 25 is transmitted to the threshing part 7. And the threshing clutch 57 is engaged / disengaged by operating the operation clutch lever provided in the driving part 15, and the power transmission to the threshing part 7 is engaged and disconnected.

[0093] Regarding the power transmission system for the screening unit 8, the threshing unit input shaft 56 includes a support shaft portion for the winnowing machine 47. The rotational power of the threshing unit input shaft 56 is transmitted to the pulley rotating body 63 supported by the threshing intermediate shaft 62 via a fourth belt transmission mechanism 61. The rotational power of the pulley rotating body 63 is transmitted to the preliminary fan 71 and the winnowing machine 47 via a predetermined transmission mechanism. Furthermore, the rotational power of the threshing unit input shaft 56 is transmitted to the rotating shafts of the first-grade product conveyor 45, the second fan 72, and the second-grade product conveyor 46 via predetermined transmission mechanisms.

[0094] The rotational power of the first-grade product conveyor 45 is transmitted to the winnowing conveyor 49 via a predetermined transmission mechanism. The rotational power of the second-grade product conveyor 46 is transmitted to the swing shaft 44a of the swing mechanism 44 via the fifth belt transmission mechanism 64. The rotational power of the second-grade product conveyor 46 is transmitted to the return conveyor 48 via a bevel gear.

[0095] Regarding the power transmission system for the reaper unit 3, the rotational power of the pulley rotor 63 is transmitted to the front rotor shaft 28 via the sixth belt transmission mechanism 3. The sixth belt transmission mechanism 73 is equipped with a reaper clutch 75 that randomly and intermittently transmits the rotational power of the pulley rotor 63 to the front rotor shaft 28. The rotational power of the front rotor shaft 28 is transmitted to the reaper unit input shaft 38 via the first chain transmission mechanism 65. The rotation of the reaper unit input shaft 38 drives the conveyor 36 within the feed chamber 35.

[0096] The rotational power of the harvester input shaft 38 is transmitted to the PF (platform) drive shaft 67 via the second chain transmission mechanism 66. The rotational power of the PF drive shaft 67 is transmitted via the third chain transmission mechanism 68 to the PF auger shaft 37a, which rotates the raking auger 37. Furthermore, the rotational power of the PF drive shaft 67 is transmitted via the seventh belt transmission mechanism 69 to the cutter drive shaft 32a, which drives the cutter device 32. Furthermore, the rotational power of the PF drive shaft 67 is transmitted via the fourth chain transmission mechanism 76, which includes the reel countershaft 70, to the reel shaft 34b, which rotates the raking reel 34.

[0097] According to this structure, the driving force of the engine 25 is transmitted to the harvesting part 3. The power transmission to the harvesting part 3 is connected and disconnected by operating the working clutch lever provided on the driving part 15 to engage and disconnect the harvesting clutch 75.

[0098] Regarding the power transmission system for the grain storage section 9, the rotational power of the second output shaft 25b is transmitted to the lower discharge conveyor 11 via a power transmission mechanism including the grain tank intermediate shaft 77. The rotational power of the lower discharge conveyor 11 is then transmitted to the longitudinal conveyor 12 via bevel gears. The rotational power of the longitudinal conveyor 12 is then transmitted to the grain discharge conveyor 13 via a predetermined transmission mechanism. Furthermore, the grain storage section 9 is equipped with a suction fan 78 and a compressor 79 as a structure that receives the transmission of the rotational power from the grain tank intermediate shaft 77 for driving.

[0099] As described above, the combine harvester 1 includes: the feeder 30, which is provided in front of the threshing unit 7; and the raking auger 37, which is provided in front of the feeder 30 and is used to rake the crops toward the feeder 30. Figures 5 to 9 The structure of the raking auger 37 according to this embodiment will be described.

[0100] Figure 7 yes Figure 6 AA sectional view. In addition, Figure 9 This is a developed view in which the peripheral wall portion 243 is developed in the circumferential direction about a portion of the raking auger 37 in the rotation axis direction, and schematically shows each structure of the raking auger 37 . Figure 9It is a development view of the left side portion of the raking auger 37 including a portion corresponding to the formation range (see opening range E1) of the receiving port 205 of the feeder 30 in the rotation axis direction.

[0101] exist Figure 9 In FIG, the short side direction (upper and lower directions) of the rectangle showing the outer shape of the development view corresponds to the 360° angular range of the circumferential direction of the auger main body 241. Figure 9 In the developed views shown in FIG, the circle representing the raking fingers 240 corresponds to the raking fingers 240 projected onto the outer peripheral surface 241 a, and the straight line representing the blade portion 242 corresponds to the formation position of the blade portion 242 on the outer peripheral surface 241 a.

[0102] like Figure 5 、 Figure 6 and Figure 7 As shown, the raking and gathering auger 37 has: a cylindrical auger body 241, which sets the left and right directions of the body as the direction of the rotation axis; a spiral blade portion 242 (242L, 242R), which is arranged on the outer peripheral surface 241a of the auger body 241; and a plurality of raking and gathering finger-like members 240, which protrude from the outer peripheral surface 241a of the auger body 241.

[0103] The raking auger 37 has a rotation axis C1 that is aligned with the central axis of the cylindrical shape of the auger body 241. The raking auger 37 rotates in the counterclockwise direction when viewed from the left (see FIG. Figure 7 , arrow F1), thereby the spike stalks put into the platform 31 are conveyed by the blade portion 242, and the spike stalks are moved toward the receiving port 205 (refer to Figure 5 ) is sent in. Hereinafter, the rotation axis direction of the raking auger 37 (the auger main body 241) is referred to as the "auger axial direction".

[0104] The auger body 241 has an outer diameter and length that fits within the space within the platform 31. The auger body 241 has a length that is approximately the same as the dimension between the left and right walls 201, 202 of the platform 31, and extends substantially the entire length of the platform 31 in the left-right direction. The auger body 241 includes a peripheral wall 243 forming an outer peripheral surface 241a, and left and right end surfaces 244, 245, both perpendicular to the rotation axis C1. These surfaces define a cylindrical space, thereby forming a hollow portion.

[0105] The blade portion 242 is the part that conveys the crop in the auger's axial direction. The blade portion 242 is a plate-like portion formed in a spiral shape centered on the rotation axis C1 along the outer circumferential surface 241a of the auger main body 241. The blade portion 242 is configured by attaching the spiral plate-like component to the outer circumferential surface 241a of the auger main body 241 by welding or other means. The blade portion 242 is provided with approximately triangular ribs 246 at appropriate intervals as reinforcements to strengthen the outer circumferential surface 241a.

[0106] The raking auger 37 includes, as blade portions 242, a right blade portion 242R as a first blade portion, which is provided on the right side of the auger main body 241; and a left blade portion 242L as a second blade portion, which is provided on the left side of the auger main body 241. The right blade portion 242R is the blade portion 242 that directs the conveying action in the auger axial direction to the left, and the left blade portion 242L is the blade portion 242 that directs the conveying action to the right.

[0107] The left blade portion 242L and the right blade portion 242R are each arranged to form an integral, continuous spiral shape. The right blade portion 242R is arranged in a range from the right end of the auger body 241 to more than half of the overall length of the auger body 241 (approximately 3 / 5 to 2 / 3). The left blade portion 242L is arranged in a range from the left end of the auger body 241 to approximately 1 / 5 of the overall length of the auger body 241.

[0108] Therefore, if Figure 6 As shown, the raking auger 37 is divided into three areas in the left-right direction: a right blade-forming area D1, where the right blade 242R is formed; a left blade-forming area D2, where the left blade 242L is formed; and a blade-free area D0, which is the area between the right and left blade-forming areas D1 and D2 and where blades 242 are not formed. The blade-free area D0 is included in the opening E1 of the receiving port 205 of the feeder 30 in the left-right direction and is located in the middle of the opening E1. In other words, the portion of the raking auger 37 where the blade-free area D0 is located is located in front of the receiving port 205. For example, the opening E1 is approximately 550 mm.

[0109] The right blade portion 242R and the left blade portion 242L have a substantially constant height relative to the outer peripheral surface 241a, and are provided at substantially constant intervals. In this embodiment, the right blade portion 242R has approximately three turns, and the left blade portion 242L has approximately one turn. However, the number of turns and the intervals between the blade portions are not particularly limited.

[0110] As described above, as the blade portion 242, the raking auger 37 has: a right blade portion 242R, which is provided on the right side of the left and right sides of the portion in front of the feeder 30 as the auger main body 241 (hereinafter referred to as the "feeder front portion"); and a left blade portion 242L, which is provided on the left side of the other left and right sides of the feeder front portion of the auger main body 241. The left blade portion 242L is formed in a range shorter than the right blade portion 242R in the left-right direction. This left-right asymmetric structure of the left and right blade portions 242 corresponds to the configuration of the feeder 30 close to the left side relative to the platform 31. In addition, the feeder front portion of the auger main body 241 is a portion corresponding to the opening range E1 of the receiving port 205 of the feeder 30 in the left-right direction.

[0111] Regarding this structure, the rake auger 37 rotates in the counterclockwise direction when viewed from the left (refer to Figure 7 , arrow F1), the right blade portion 242R and the left blade portion 242L transport the spike stem fed into the platform 31 laterally toward the receiving port 205. That is, the right blade portion 242R transports the portion of the spike stem fed into the right side of the platform 31 toward the left side, which is the blade non-formed area D0, and the left blade portion 242L transports the portion of the spike stem fed into the left side of the platform 31 toward the right side, which is the blade non-formed area D0.

[0112] The raking fingers 240 are constructed from linear rod-shaped members, extending through the peripheral wall 243 of the auger body 241 and projecting from the outer peripheral surface 241a. A resin sliding bushing 247 is provided in the portion of the peripheral wall 243 through which the raking fingers 240 pass. The sliding bushing 247 has a through-hole through which the raking fingers 240 pass, and is attached to the peripheral wall 243 using fasteners such as bolts 247a. The raking fingers 240 are supported by the sliding bushing 247 while penetrating the sliding bushing 247.

[0113] like Figure 8 As shown, the raking finger 240 is supported by the support boss 251 so as to be rotatable relative to the finger support shaft 250 (250A, 250B) provided in the auger body 241. Figure 7 and Figure 8As shown, the support boss 251 includes a cylindrical shaft support portion 251a through which the finger support shaft 250 passes, and a cylindrical finger support portion 251b that securely supports the base end of the raking finger 240 so that it is inserted therein. The raking finger 240 is fastened and fixed to the support boss 251 using a bolt 252 and a nut 253 that pass through the base end of the raking finger 240 and the finger support portion 251b.

[0114] The finger support shaft 250 is a straight rod-shaped shaft with the left-right direction as the axial direction, and is an eccentric shaft with the axis C2 as the shaft center line located eccentrically relative to the rotation axis C1 of the rake auger 37. The axis C2 of the finger support shaft 250 is located in the front lower position relative to the rotation axis C1 of the rake auger 37 (see Figure 7 The finger support shaft 250 is a fixed shaft whose position relative to the rotation axis C1 is constant.

[0115] When viewed in the axial direction of axis C2, the raking fingers 240 extend radially along a circumferential shape centered on axis C2 and project radially outward from the finger support shaft 250. The raking fingers 240 are arranged such that their base ends are supported by the finger support shaft 250 via support bosses 251 and their tip ends extend through sliding bushings 247, thereby being positioned between the finger support shaft 250 and the peripheral wall 243.

[0116] The raking auger 37 is configured such that, utilizing the eccentric structure of the finger support shaft 250, the raking fingers 240 are exposed and retracted relative to the peripheral wall portion 243 as the raking auger 37 rotates about the rotation axis C1. The through-holes of the sliding bushings 247 serve as support holes for the raking fingers 240 to slide as they are exposed and retracted relative to the peripheral wall portion 243.

[0117] Specifically, the raking fingers 240 are supported so as to be rotatable relative to the finger support shaft 250 by the support boss 251. Furthermore, the raking fingers 240 are supported on the peripheral wall portion 243 via the sliding bushing 247. The raking fingers 240 rotate together with the peripheral wall portion 243 about the axis C2, thereby being exposed or retracted relative to the peripheral wall portion 243. Regarding the protrusion amount of the raking fingers 240 from the peripheral wall portion 243 (hereinafter referred to as the "finger protrusion amount"), when viewed in the axial direction of the rotation axis C1, the protrusion amount of the raking fingers 240 is the largest at the front side of the straight line connecting the rotation axis C1 and the axis C2, and the smallest at the rear side, which is in the opposite phase to the straight line.

[0118] exist Figure 7In the example shown, the position of the raking finger 240 facing the front and bottom (slightly lower in the front and higher in the back) relative to the position of the axis C2 is the position where the finger protrudes the most, and the position on the opposite side, that is, the position of the raking finger 240 facing the back and top (slightly higher in the back and lower in the front) relative to the position of the axis C2 is the position where the finger protrudes the least. The maximum finger protrusion is about 2 / 3 of the total length of the raking finger 240. When the finger protrusion of the raking finger 240 is the smallest, the front end is located in the through hole of the sliding bushing 247. Figure 7 , the trajectory S1 of the front end of the raking finger 240 is shown by a two-dot chain line.

[0119] like Figure 8 As shown, the raking auger 37 is supported rotatably around the rotation axis C1 between the right side wall 202 and the left side wall 201 of the platform 31 by a rotating support shaft 261 supporting the right side of the raking auger 37 and a fixed support shaft 262 supporting the left side of the raking auger 37 .

[0120] The rotating support shaft 261 is disposed at the right end of the raking auger 37 so that its axis is aligned with the rotation axis C1, and the right end protrudes to the right from the right end surface 245 of the auger body 241. The rotating support shaft 261 is fixed to the right end surface 245 via a mounting plate 263. The mounting plate 263 is a plate-shaped member through which the rotating support shaft 261 passes and is fixed to the rotating support shaft 261. It is fixed to the left and right outer sides (right side) of the right end surface 245 via bolts or other fasteners.

[0121] The rotating support shaft 261 passes through the first intermediate support plate 265 provided on the left side of the right end surface portion 245. The first intermediate support plate 265 is a plate-shaped portion perpendicular to the rotation axis C1 and is fixed to the peripheral wall portion 243. The rotating support shaft 261 is fixed to the first intermediate support plate 265 via the mounting plate 266. The mounting plate 266 is a plate-shaped component through which the rotating support shaft 261 passes and is fixed to the rotating support shaft 261. It is fixed to the left and right outer sides (right side) of the first intermediate support plate 265 via a fixing member such as a bolt. In this way, the rotating support shaft 261 is a portion that rotates integrally with the auger body 241 by being fixed to the right end surface portion 245 and the first intermediate support plate 265.

[0122] The right end of the rotating support shaft 261 is rotatably supported on the right side wall portion 202 by means of a mounting plate 267 and a bearing component 268 such as a bearing. The mounting plate 267 is a plate-shaped component that supports the rotating support shaft 261 as a rotatable component by means of the bearing component 268, and is fixed to the outer side (right side) of the right side wall portion 202 by means of fixing parts such as bolts. On the inner side (left side) of the right side wall portion 202, a circular plate-shaped winding prevention plate 269 is provided in a manner that closes the opening edge portion on the right side of the peripheral wall portion 243. The winding prevention plate 269 is fastened to the right side wall portion 202 together with the mounting plate 267 by means of fixing parts. On the protruding portion of the rotating support shaft 261 from the right side wall portion 202 to the right, a sprocket 259 constituting the third chain transmission mechanism 68 is fixedly provided.

[0123] The base end of the first connecting arm 271 is supported for relative rotation at the left end of the rotation support shaft 261, which passes through the first intermediate support plate 265. The first connecting arm 271 is arranged at a right angle to the axial direction of the rotation support shaft 261. The right end of the first finger support shaft 250A, located on the right side of the finger support shaft 250, is supported for relative rotation at the front end of the first connecting arm 271.

[0124] To the left of the first intermediate support plate 265, a second intermediate support plate 272 is provided, positioned approximately in the left-right center of the auger body 241. The second intermediate support plate 272 is a plate-shaped portion perpendicular to the rotation axis C1 and is fixed to the peripheral wall 243. An intermediate support shaft 275, with its axis aligned with the rotation axis C1, is supported by the second intermediate support plate 272 for relative rotation via a bearing member 276, such as a bearing, extending therethrough.

[0125] The left end of the first finger support shaft 250A is connected to the right end of the intermediate support shaft 275 via a second connecting arm 277. The second connecting arm 277 is connected by a fixing bolt 277a so as to be non-rotatable relative to both the intermediate support shaft 275 and the first finger support shaft 250A. The fixing bolt 277a is screwed into a nut 277b while penetrating the second connecting arm 277 in the longitudinal direction and the intermediate support shaft 275 and the first finger support shaft 250A in the radial direction.

[0126] The right end of the second finger support shaft 250B, located on the left side of the finger support shaft 250, is connected to the left end of the intermediate support shaft 275 via the third connecting arm 278, using a structure that is substantially bilaterally symmetrical with the connection structure of the first finger support shaft 250A via the second connecting arm 277. The third connecting arm 278 is connected to the left end of the intermediate support shaft 275 via a fixing bolt 278a so as to be non-rotatable relative to both the intermediate support shaft 275 and the second finger support shaft 250B. The fixing bolt 278A is threadedly engaged with a nut 278b, penetrating the third connecting arm 278 in the longitudinal direction and penetrating both the intermediate support shaft 275 and the second finger support shaft 250B in the radial direction.

[0127] The right end of the fixed support shaft 262 is connected to the left end of the second finger support shaft 250B via the fourth connecting arm 279. The fourth connecting arm 279 is connected by a fixing bolt 279a so as to be non-rotatable relative to both the second finger support shaft 250B and the fixed support shaft 262. The fixing bolt 279a is screwed into the nut 279b so as to penetrate the fourth connecting arm 279 in the longitudinal direction and penetrate both the second finger support shaft 250B and the fixed support shaft 262 in the radial direction.

[0128] The left end of the fixed support shaft 262 is fixed to the left side wall 201 by means of a mounting plate 280. The mounting plate 280 is a plate-shaped member through which the fixed support shaft 262 passes and is fixed to the fixed support shaft 262, and is located on the outside (left side) of the left side wall 201. The mounting plate 280 is located on the inside (right side) of the left side wall 201 and fixed to the inner plate 284 (see Figure 6 ) together with the left side wall portion 201, and is fastened together with the inner plate 284 by a fixing member and is fixed to the left side wall portion 201. A circular plate-shaped winding prevention plate 281 is provided on the inner side (right side) of the left side wall portion 201 in a manner that blocks the opening edge portion on the left side of the peripheral wall portion 243. The winding prevention plate 281 is fastened together with the mounting plate 280 by a fixing member and is fixed to the left side wall portion 201. In addition, the fixed support shaft 262 is supported on the left end surface portion 244 constituting a part of the auger main body portion 241 in a manner that allows relative rotation while passing through the bearing component 282 such as a bearing.

[0129] In the above-described structure, the shaft structure comprising, in order from the left, the fixed support shaft 262, the fourth connecting arm 279, the second finger support shaft 250B, the third connecting arm 278, the intermediate support shaft 275, the second connecting arm 277, the first finger support shaft 250A, and the first connecting arm 271 is fixedly mounted on the left side wall 201 of the platform 31 and constitutes a fixed shaft structure within the platform 31. The right side of this fixed shaft structure is supported by a rotating support shaft 261 rotatable relative to the right side wall 202. Furthermore, relative to the fixed shaft structure, the auger body 241, the blades 242, and the rotating support shaft 261 form a rotating unit that rotates integrally about the rotation axis C1, and the multiple raking fingers 240 form an eccentric rotating unit that rotates about the axis C2 at an eccentric position as the rotating unit rotates.

[0130] With the above structure, the raking fingers 240 are supported by the first finger support shaft 250A and the second finger support shaft 250B. Figure 8 As shown, in this embodiment, one raking finger 240 is provided on the first finger support shaft 250A, and fifteen raking fingers 240 are provided on the second finger support shaft 250B, for a total of sixteen raking fingers 240 .

[0131] The first finger support shaft 250A has a raking finger 240 at its right end. The second finger support shaft 250B has fourteen raking fingers 240 arranged adjacent to or in close proximity in the axial direction of the finger support shaft 250, from the right end to the left. One raking finger 240 is provided at the left end. Hereinafter, for ease of identification, the sixteen raking fingers 240 will be referred to as the first to sixteenth fingers 240a to 240p, in order from right to left. Specifically, the first finger 240a is provided on the first finger support shaft 250A, and the second to sixteenth fingers 240b to 240p are provided on the second finger support shaft 250B.

[0132] The sliding bushes 247 supporting the respective raking fingers 240 are provided at intervals of 90° in the circumferential direction of the auger body 241 when viewed in the axial direction of the rotation axis C1 (see FIG. Figure 7 That is, the sixteen raking fingers 240 are located at any of the first to fourth phase positions at intervals of 90 degrees in the circumferential direction of the auger body 241 (the circumferential direction centered on the rotation axis C1).

[0133] exist Figure 8 and Figure 9In the illustrated example, in a left side view of the raking auger 37, the first finger 240a, the third finger 240c, the sixth finger 240f, the tenth finger 240j, and the sixteenth finger 240p are located in the first phase position P1 in the clockwise direction of the auger body 241. Furthermore, the fourth finger 240d, the eighth finger 240h, the twelfth finger 240l, and the fifteenth finger 240o are located in the second phase position P2. Furthermore, the seventh finger 240g, the eleventh finger 240k, and the fourteenth finger 240n are located in the third phase position P3. Furthermore, the second finger 240b, the fifth finger 240e, the ninth finger 240i, and the thirteenth finger 240m are located in the fourth phase position P4.

[0134] The raking auger 37 also has multiple openings 285 for assembling and maintaining the internal structure of the auger body 241. The openings 285 are constructed by sealing a hole 243a formed in the peripheral wall 243 with a cover 286. The cover 286 is curved to follow the curved surface of the peripheral wall 243 and is detachable from the peripheral wall 243 using bolts or the like. The openings 285 are provided at multiple locations (e.g., seven locations) on the auger body 241 at appropriate intervals, where they do not interfere with the blades 242.

[0135] According to the raking and gathering auger 37 having the above-described structure, the harvested stalks conveyed into the platform 31 can be raked by the plurality of raking and gathering fingers 240. Within the platform 31, the blades 242 can convey the stalks toward the receiving opening 205, and the plurality of raking and gathering fingers 240 can deliver the stalks toward the receiving opening 205. On the front side of the raking and gathering auger 37, the raking and gathering fingers 240, which protrude significantly from the peripheral wall 243, can be used to gather the stalks. On the rear side of the raking and gathering auger 37, the protrusion of the raking and gathering fingers 240 from the peripheral wall 243 is reduced, thereby preventing interference between the raking and gathering fingers 240 and other components.

[0136] use Figure 9 The configuration of the raking fingers 240 of the raking auger 37 having the above structure will be described.

[0137] like Figure 9As shown, among the plurality of raking fingers 240, the plurality of raking fingers 240 located in front of the feeder 30 are arranged as raking finger rows that are arranged with a common position in the circumferential direction of the outer peripheral surface 241a of the auger main body 241 (hereinafter referred to as the "auger circumferential direction"), including: a first finger row 301 consisting of a first number of raking fingers 240, and a second finger row 302 consisting of a second number of raking fingers 240 that is less than the first number. In this embodiment, with respect to the first finger row 301 and the second finger row 302, the first number is 4 (pieces), and the second number is 3 (pieces), which is one less than the first number.

[0138] The raking auger 37 includes two finger rows as the first finger row 301: a first finger row 301A consisting of the fourth finger 240d, the eighth finger 240h, the twelfth finger 240l, and the fifteenth finger 240o; and a first finger row 301B consisting of the second finger 240b, the fifth finger 240e, the ninth finger 240i, and the thirteenth finger 240m. Furthermore, the raking auger 37 includes two finger rows as the second finger row 302: a second finger row 302A consisting of the third finger 240c, the sixth finger 240f, and the tenth finger 240j; and a second finger row 302B consisting of the seventh finger 240g, the eleventh finger 240k, and the fourteenth finger 240n.

[0139] The first finger rows 301 and the second finger rows 302 are arranged alternately along the circumference of the auger. Specifically, the first finger rows 301 and the second finger rows 302 are arranged alternately at the first to fourth phase positions P1 to P4, which are spaced 90 degrees apart along the circumference of the auger. Specifically, the second finger row 302A is arranged at the first phase position P1, the first finger row 301A is arranged at the second phase position P2, the second finger row 302B is arranged at the third phase position P3, and the first finger row 301B is arranged at the fourth phase position P4.

[0140] The first finger row 301 and the second finger row 302 arrange the raking fingers 240 so that the intervals between adjacent raking fingers 240 in the auger axial direction are constant or substantially constant. In other words, the raking fingers 240 in each of the first finger row 301 and the second finger row 302 are arranged at constant or substantially constant intervals in the left-right direction.

[0141] In this embodiment, the first and second finger rows 301 and 302 set the spacing between adjacent raking fingers 240 in the auger axial direction (hereinafter referred to as the "finger spacing") to a common, predetermined dimension ΔK1. The finger spacing is defined as the spacing between the centers of adjacent raking fingers 240 in the auger axial direction. As an example, dimension ΔK1 is approximately 150 mm.

[0142] Specifically, if Figure 9 As shown, the 14 raking fingers 240 constituting the first finger row 301 and the second finger row 302 are arranged in the auger axial direction within a range that includes the right end position Ea and the left end position Eb of the opening range E1 of the receiving port 205 of the feeder 30. In describing the arrangement of the raking fingers 240 within the opening range E1, the dimension ΔK0, which divides the opening range E1 into 15 equal parts in the auger axial direction, is set as one scale mark.

[0143] The common finger spacing dimension ΔK1 for the first finger row 301 and the second finger row 302 is four scale divisions. Furthermore, in the auger axial direction, the first finger row 301A at the second phase position P2 positions the fifteenth finger 240o, located on the far left, at the left end position Eb of the opening range E1. The first finger row 301B at the fourth phase position P4 positions the second finger 240b, located on the far right, at the right end position Ea of the opening range E1. Furthermore, in the auger axial direction, the second finger row 302A at the first phase position P1 positions the third finger 240c, located on the far right, one scale division to the left of the right end position Ea of the opening range E1. The second finger row 302B at the third phase position P3 positions the fourteenth finger 240n, located on the far left, one scale division to the right of the left end position Eb of the opening range E1.

[0144] With this arrangement, the 14 raking fingers 240 within the opening range E1 are positioned at different positions along the auger axis. Specifically, the 14 raking fingers 240 are arranged in the order of the second to fifteenth fingers 240b to 240o from the right to the left along the auger axis. These raking fingers 240 are positioned at different positions along the auger axis. Specifically, along the auger axis, one raking finger 240 is positioned at each of the 14 scale positions from the right end position Ea to the left end position Eb, excluding the third scale position Ma from the right and the third scale position Mb from the left.

[0145] The raking and gathering auger 37 has the following configuration regarding the arrangement of the raking and gathering fingers 240 in relation to the blades 242. Specifically, the blades 242 are arranged so that the distance between the distal end of the blades 242 in the conveying direction and the raking and gathering fingers 240 located closest to the distal end is the same as, or substantially the same as, the distance between the fingers.

[0146] like Figure 9 As shown, the distal ends 242a and 242b of the right blade portion 242R and the left blade portion 242L in the conveying direction are both located within the opening range E1 of the receiving port 205. Here, the distal end 242a of the right blade portion 242R is the left end of the right blade portion 242R, and the distal end 242b of the left blade portion 242L is the right end of the left blade portion 242L.

[0147] exist Figure 9 In the example shown, the tip 242a of the right blade portion 242R is located between the third phase position P3 and the fourth phase position P4 in the auger circumferential direction and at the fourth scale mark from the right in the auger axial direction. Furthermore, the tip 242b of the left blade portion 242L is located between the first phase position P1 and the second phase position P2 in the auger circumferential direction and between the third scale mark and the fourth scale mark from the left in the auger axial direction.

[0148] Furthermore, the right blade portion 242R is designed so that the dimension of the gap Ga between its tip portion 242a and the fifth finger 240e of the raking finger 240 closest to the tip portion 242a is substantially equal to the dimension ΔK1 between the fingers. Furthermore, the left blade portion 242L is designed so that the dimension of the gap Gb between its tip portion 242b and the tenth finger 240j of the raking finger 240 closest to the tip portion 242b is substantially equal to the dimension ΔK1 between the fingers.

[0149] In addition, if Figure 10 As shown, in the expanded view of the raking and gathering auger 37, among the multiple raking and gathering fingers 240 arranged within the range of the opening range E1, at least one raking and gathering finger 240 is arranged near the extension line R1 of the end portion of the conveying direction of the blade portion 242, that is, roughly on the extension line R1 (on the omitted line of the extension line R1).

[0150] like Figure 10As shown, the extension line R1 of the end portion of the blade portion 242 in the conveying direction is a straight line extending from the end portions 242a and 242b of the straight lines representing the left and right blade portions 242R and 242L in the expanded view of the raking auger 37. With respect to the right blade portion 242R, the raking fingers 240 located substantially on the extension line R1 are: the first finger row 301B (see Figure 9 ) included in the fifth finger 240e. With respect to the left blade portion 242L, the raking fingers 240 substantially located on the extension line R1 are: the first finger row 301A (refer to Figure 9 ) includes a twelfth finger 240l. Here, the raking finger 240 is arranged substantially on the extension line R1 so that at least a portion of the raking finger 240 is located within a predetermined angular range (e.g., within a range of ±5°) centered around the distal ends 242a, 242b of the blades 242R, 242L with respect to the extension direction of the extension line R1.

[0151] Regarding each blade portion 242R, 242L, the fifth finger 240e and the twelfth finger 240l, which are located approximately on the extension line R1, are arranged on the opposite side of the conveying action of each blade portion 242R, 242L, relative to the extension line R1, in the auger axial direction. Specifically, the fifth finger 240e, which is located approximately on the extension line R1 of the right blade portion 242R, is located on the right side of the extension line R1, opposite to the left side of the conveying action of the right blade portion 242R. Similarly, the twelfth finger 240l, which is located approximately on the extension line R1 of the left blade portion 242L, is located on the left side of the extension line R1, opposite to the right side of the conveying action of the left blade portion 242L.

[0152] In addition, if Figure 10 As shown, the plurality of raking fingers 240 located in front of the feeder 30 are arranged along the first straight lines La1 to La4 and the second straight lines Lb1 to Lb3 inclined in the following direction, wherein the direction is: relative to the circumferential direction of the auger ( Figure 10 The blade portion 242 is in the same direction as the vertical direction of the inclined straight line. Figure 10 In FIG. 2 , first straight lines La1 to La4 are indicated by dashed lines, and second straight lines Lb1 to Lb3 are indicated by double-dashed lines. Both first straight lines La1 to La4 and second straight lines Lb1 to Lb3 are lines along the spiral shape of the cylindrical auger body 241 .

[0153] exist Figure 10In the example shown, the second finger 240b, the third finger 240c, and the fourth finger 240d are arranged along the first straight line La1 located at the rightmost position. Furthermore, the fifth finger 240e, the sixth finger 240f, and the eighth finger 240h are arranged along the first straight line La2 located second from the right. Furthermore, the seventh finger 240g, the ninth finger 240i, the tenth finger 240j, and the twelfth finger 240l are arranged along the first straight line La3 located third from the right. Furthermore, the eleventh finger 240k, the thirteenth finger 240m, and the fifteenth finger 240o are arranged along the first straight line La4 located at the leftmost position.

[0154] The third finger 240c, the fifth finger 240e, and the seventh finger 240g are arranged along the second straight line Lb1 located on the right side. The fourth finger 240d, the sixth finger 240f, the ninth finger 240i, and the eleventh finger 240k are arranged along the second straight line Lb2 located second from the right side. The eighth finger 240h, the tenth finger 240j, the thirteenth finger 240m, and the fourteenth finger 240n are arranged along the second straight line Lb3 located on the left side.

[0155] exist Figure 10 In the developed view shown, the gathering fingers 240 arranged along each of the first lines La1 to La4 and the second lines Lb1 to Lb3 are positioned on, or overlap, the respective lines. The arrangement of the gathering fingers 240 relative to the respective lines is not limited to having the center of the gathering fingers 240 on the respective lines (the center position may deviate from the lines).

[0156] The second straight lines Lb1-Lb3 are parallel or substantially parallel to the line representing the left blade portion 242L in a developed view of the raking and gathering auger 37. In other words, the inclination angle of the second straight lines Lb1-Lb3 is the same as or substantially the same as the inclination angle of the left blade portion 242L. Here, the inclination angle refers to the angle formed relative to the circumferential direction of the auger in a developed view of the raking and gathering auger 37.

[0157] In this embodiment, the inclination angle θ1 of the left blade portion 242L is approximately 25°, and the inclination angle of the second straight lines Lb1 to Lb3 is approximately 20°. The inclination angles of the second straight lines Lb1 to Lb3 are set, for example, to be within the range of the inclination angle θ1 ± 10° relative to the inclination angle θ1 of the left blade portion 242L, and more preferably within the range of the inclination angle θ1 ± 5°. Furthermore, the inclination angle of the first straight lines La1 to Lb4 is approximately 13°.

[0158] The first straight lines La1-La4 and the second straight lines Lb1-Lb3 form a roughly diamond-shaped lattice. Furthermore, the plurality of raking fingers 240 provided within the opening E1 of the receiving port 205 are arranged at positions corresponding to the intersections of the roughly diamond-shaped lattice (staggered arrangement). Thus, among the plurality of raking fingers 240 of the raking auger 37, the plurality of raking fingers 240 located in front of the feeder 30, i.e., the plurality of raking fingers 240 provided within the opening E1, are arranged in a staggered pattern.

[0159] According to the combine harvester 1 according to the present embodiment having the above-described structure, the structure including the raking auger 37 for raking the harvested crops toward the feeder 30 can improve the crop collecting performance of the raking auger 37 .

[0160] The raking and gathering auger 37 includes a plurality of raking and gathering fingers 240 disposed within the opening E1 of the collection opening 205. These fingers are arranged alternately in the circumferential direction of the auger, with a constant spacing between the fingers. This configuration allows for the efficient addition of raking and gathering fingers 240, enabling efficient raking while evenly striking the stalks with the raking and gathering fingers 240, thereby improving stalk collection. Specifically, during harvesting operations involving a large amount of wheat stalks, the raking and gathering fingers 240 can effectively change the stalks' position, thereby improving the stalk collection efficiency of the raking and gathering auger 37.

[0161] Furthermore, the right blade portion 242R and the left blade portion 242L are arranged so that the distance between the respective tips 242a and 242b and the raking fingers 240 closest to the tips is approximately the same as the distance between the fingers. This configuration reduces clogging caused by unexpectedly clumping stalks, and allows for stable stalk striking while achieving good collection.

[0162] Furthermore, the plurality of raking fingers 240 provided in the opening range E1 are arranged in a staggered pattern. With this structure, the next raking fingers 240 (the next raking fingers 240 that arrive due to the rotation of the raking auger 37) can strike the spikelets that pass between the raking fingers 240 during the rotation of the raking auger 37. Therefore, the raking fingers 240 can effectively act on the spikelets, thereby improving the collection performance.

[0163] In particular, in this embodiment, the plurality of (14) raking fingers 240 provided in the opening range E1 are all arranged so that their positions along the auger axis are different. This configuration allows the raking fingers 240 to function uniformly on all stalks, thereby efficiently improving the collection performance.

[0164] Furthermore, the arrangement of the plurality of raking fingers 240 along second straight lines Lb1 to Lb3, which are parallel or substantially parallel to the extension direction of the left blade portion 242L in the expanded view of the raking auger 37, allows the plurality of raking fingers 240 to achieve, in addition to the inherent raking function of the raking fingers 240, a conveying function for conveying the stems to the central portion of the feed chamber 35. This improves the stem conveying performance of the raking auger 37, making it difficult for the cut stems to become entangled in the raking fingers 240 in front of the receiving port 205 of the feeder 30. This prevents the stems from stagnating or becoming clogged, thereby enabling smooth delivery of the stems to the feeder 30.

[0165] In this embodiment, the number of raking fingers 240 constituting the first finger row 301 is four, and the number of raking fingers 240 constituting the second finger row 302 is three. With this configuration, for example, when the opening E1 of the receiving port 205 is approximately 550 mm, the number of raking fingers 240 can be increased efficiently, thereby preventing clogging of the grain stems and effectively improving the receiving performance.

[0166] The raking auger 37 also includes raking fingers 240 (fifth finger 240e and twelfth finger 240l) positioned on an ellipsoidal line extending from line R1 of the distal end of the blade 242 in the conveying direction. This configuration allows the raking fingers 240 to easily engage with spikelets that have fallen due to a change in position. This allows for efficient conveyance of spikelets, improving spikelet collection efficiency.

[0167] Furthermore, the raking fingers 240, which are arranged on the omission line of the extended line R1, are arranged on the opposite side of the extended line R1 in the left-right direction to the direction of the conveying action of the blade portion 242. With this structure, the conveyance of the spikelets is not hindered near the distal end of the blade portion 242 in the conveying direction, and good conveyance of the spikelets can be achieved, thereby effectively improving the efficiency of collecting the spikelets.

[0168] As described above, with respect to the raking and gathering auger 37 involved in this embodiment, raking and gathering fingers 240 are additionally provided, and the spacing of the raking and gathering fingers 240 in the axial direction of the auger, the arrangement of the raking and gathering fingers 240 in the circumferential direction of the auger, etc. are regularly arranged in terms of the relationship with the blade portion 242, thereby achieving an improvement in the collection performance of the spikelets.

[0169] [Second embodiment]

[0170] use Figure 11 and Figure 12The second embodiment of the present invention will be described. In the second embodiment of the present invention described below, common or corresponding structures with the first embodiment are designated by the same names or reference numerals, and redundant descriptions are omitted as appropriate. The combine harvester according to this embodiment differs from the first embodiment in the arrangement of the gathering fingers 240 and the structure of the blades 242 of the gathering auger 37.

[0171] like Figure 11 As shown in the embodiment, as the raking fingers 240 provided in the opening range E1 of the receiving port 205 of the feeder 30, there are formed in order from the right to the left ten raking fingers 240, namely, the second to the eleventh fingers 240B to 240K. The ten raking fingers 240 are provided so as to be supported by the second finger support shaft 250B (see FIG. Figure 8 ) state, and is located at any position of the first to fourth phase positions in the circumferential direction of the auger. Figure 11 In the figure, from the perspective of showing the continuity of the blade portion 242, in the auger circumferential direction corresponding to the up-down direction of the drawing, a state is shown in which the developed view of the 360° angular range of the auger body portion 241 is connected up and down.

[0172] exist Figure 11 In the example shown, the second finger 240B, the fourth finger 240D, and the seventh finger 240H are located at the first phase position P1. Furthermore, the third finger 240C and the sixth finger 240F are located at the second phase position P2. Furthermore, the fifth finger 240E, the ninth finger 240I, and the eleventh finger 240K are located at the third phase position P3. Furthermore, the seventh finger 240G and the tenth finger 240J are located at the fourth phase position P4.

[0173] like Figure 11 As shown, among the plurality of raking fingers 240, the plurality of raking fingers 240 located in front of the feeder 30 include a first finger row 401 consisting of a first number of raking fingers 240, and a second finger row 402 consisting of a second number of raking fingers 240 less than the first number, as raking finger rows. In this embodiment, the first number of the first finger row 401 and the second finger row 402 is 3 (pieces), and the second number is 2 (pieces), which is one less than the first number.

[0174] The raking auger 37 includes two finger rows as the first finger row 401: a first finger row 401A consisting of the second finger 240B, the fourth finger 240D, and the seventh finger 240H; and a first finger row 401B consisting of the fifth finger 240E, the ninth finger 240I, and the eleventh finger 240K. Furthermore, the raking auger 37 includes two finger rows as the second finger row 402: a second finger row 402A consisting of the third finger 240C and the sixth finger 240F; and a second finger row 402B consisting of the seventh finger 240G and the tenth finger 240J.

[0175] The first finger row 401 and the second finger row 402 are alternately arranged along the circumference of the auger. Specifically, the first finger row 401A is arranged at the first phase position P1, the second finger row 402A is arranged at the second phase position P2, the first finger row 401B is arranged at the third phase position P3, and the second finger row 402B is arranged at the fourth phase position P4.

[0176] The first finger row 401 and the second finger row 402 arrange the raking fingers 240 so that the finger spacing is constant or substantially constant. In this embodiment, the first finger row 401 and the second finger row 402 have a common predetermined dimension ΔK1 for the finger spacing.

[0177] Specifically, if Figure 11 As shown, the ten raking fingers 240 constituting the first finger row 401 and the second finger row 402 are arranged in the auger axial direction within the opening range E1 of the receiving port 205 of the feeder 30 .

[0178] The common finger spacing ΔK1 for the first finger row 401 and the second finger row 402 is four scale divisions. Furthermore, in the auger axial direction, the first finger row 401A at the first phase position P1 positions the second finger 240B, located on the far right, one scale division to the left of the right end position Ea of the opening range E1. The first finger row 401B at the third phase position P3 positions the eleventh finger 240K, located on the far left, one scale division to the right of the left end position Eb of the opening range E1. In addition, in the axial direction of the auger, the second finger-shaped member column 402A of the second phase position P2 makes the third finger-shaped member 240C on the right side located at a position 3 scales to the left of the right end position Ea of the opening range E1, and the second finger-shaped member column 402B of the fourth phase position P4 makes the tenth finger-shaped member 240J on the left side located at a position 3 scales to the right of the left end position Eb of the opening range E1.

[0179] With this arrangement, the ten raking fingers 240 within opening range E1 are positioned at different positions along the auger axis. Specifically, the ten raking fingers 240 are arranged in the order of the second to eleventh fingers 240B to 240K from right to left along the auger axis, with these raking fingers 240 positioned at different positions along the auger axis. Specifically, along the auger axis, one raking finger 240 is positioned at each of the ten scale positions from right end position Ea to left end position Eb, excluding the six positions at right end position Ea and left end position Eb, the third and fifth scale positions Mc and Md from the right, and the third and fifth scale positions Me and Mf from the left.

[0180] like Figure 11 As shown, in this embodiment, the blade portion 242 includes a plurality of blade structure portions 450 that have different inclination angles relative to the auger circumference. Here, the inclination angle relative to the auger circumference is: in the expanded view of the rake auger 37, the blade portion 242 relative to the auger circumference ( Figure 11 The angle formed by the vertical direction) (hereinafter referred to as the "tilt angle").

[0181] The blade portion 242 includes a terminal blade configuration portion 452 forming the distal end of the blade portion 242 in the conveying direction as the blade configuration portion 450. Specifically, the blade portion 242 includes a main blade configuration portion 451 forming substantially the entire blade portion, and a terminal blade configuration portion 452 provided at the distal end of the blade portion 242.

[0182] The main blade structure 451 and the end blade structure 452 form a continuous, integrated portion of the blade 242. The main blade structure 451 and the end blade structure 452 have different inclination angles. The inclination angle α1 of the main blade structure 451 and the inclination angle α2 of the end blade structure 452 are both acute angles. Therefore, the main blade structure 451 and the end blade structure 452 form an obtuse angle in a developed view of the raking auger 37.

[0183] The tip blade structure 452 is a portion having a larger inclination angle than the main blade structure 451, which serves as the other blade structure 450. Specifically, the tip blade structure 452 has an inclination angle α2 that is greater than the inclination angle α1 of the main blade structure 451. In this embodiment, the inclination angle α1 of the main blade structure 451 is approximately 27°, while the inclination angle α2 of the tip blade structure 452 is approximately 60°. However, the magnitude of each inclination angle is not particularly limited.

[0184] Regarding the configuration in which the right blade portion 242R and the left blade portion 242L are provided as the blade portion 242, the left and right blade portions 242R and 242L have a main blade configuration portion 451 and a terminal blade configuration portion 452 so as to be symmetrical with respect to the auger axial direction. That is, for each blade portion 242, the terminal blade configuration portion 452 is provided as a portion that is curved toward the conveying direction relative to the main blade configuration portion 451.

[0185] Therefore, with respect to the right blade portion 242R, the end blade structure portion 452 is a portion that is bent to the left relative to the main blade structure portion 451, and with respect to the left blade portion 242L, the end blade structure portion 452 is a portion that is bent to the right relative to the main blade structure portion 451. With respect to the right blade portion 242R, the front end portion of the end blade structure portion 452 is the end portion 242a of the right blade portion 242R, and with respect to the left blade portion 242L, the front end portion of the end blade structure portion 452 is the end portion 242b of the left blade portion 242L.

[0186] In this embodiment, the inclination angle α1 of the main blade structure 451 and the inclination angle α2 of the tip blade structure 452 are the same for the left and right blades 242R and 242L, respectively. However, the inclination angles may be different for the left and right blades 242R and 242L. Furthermore, in this embodiment, the tip blade structure 452 is provided as a curved portion relative to the main blade structure 451. However, the tip blade structure 452 may be provided to form a curved corner with the main blade structure 451.

[0187] The right blade portion 242R and the left blade portion 242L are configured so that their phases in the auger circumferential direction are different. As described above, with the right blade portion 242R and the left blade portion 242L configured to have the same inclination angle α1 and inclination angle α2, the right blade portion 242R has its tip 242a positioned between the third phase position P3 and the fourth phase position P4 in the auger circumferential direction. Furthermore, the left blade portion 242L has its tip 242b positioned between the first phase position P1 and the second phase position P2 in the auger circumferential direction.

[0188] In this embodiment, the right blade portion 242R and the left blade portion 242L are arranged so that their phases differ by 180° in the auger circumferential direction. Therefore, the angular range Q1 between the distal ends 242a, 242b of the left and right blade portions 242R, 242L in the auger circumferential direction is 180°. Furthermore, the distance ΔK2 between the distal ends 242a, 242b of the left and right blade portions 242R, 242L in the auger axial direction is set to three scale divisions.

[0189] As described above, the left and right blade portions 242 have the terminal blade configuration portion 452 . Among the plurality of gathering fingers 240 arranged within the opening range E1 , at least one gathering finger 240 is arranged on the extension line N1 of the terminal portion of the blade portion 242 in the conveying direction.

[0190] like Figure 11 As shown, in the expanded view of the raking auger 37, the extension line N1 of the distal end of the blade portion 242 in the conveying direction is a straight line extending from the distal ends 242a and 242b of the left and right blade portions 242R and 242L, respectively, representing the straight line representing the distal blade structure 452. For the right blade portion 242R, the raking finger 240 located on the extension line N1 is the seventh finger 240G included in the second finger row 402B. For the left blade portion 242L, the raking finger 240 located on the extension line N1 is the sixth finger 240F included in the second finger row 402A.

[0191] The raking fingers 240 located on the extension line N1 of each of the left and right blades 242R and 242L are the raking fingers 240 closest to the tip portions 242a and 242b. Furthermore, the gap Gc between the tip portion 242a of the right blade 242R and the seventh finger 240G located on the extension line N1 is set to 2 to 3 scale marks, which is smaller than the distance ΔK1 between the fingers. Similarly, the gap Gd between the tip portion 242b of the left blade 242L and the sixth finger 240F located on the extension line N1 is set to 2 to 3 scale marks, which is smaller than the distance ΔK1 between the fingers.

[0192] In addition, if Figure 12 As shown, the plurality of raking fingers 240 located in front of the feeder 30 are arranged along the first straight lines Lc1, La2 and the second straight lines Ld1, Ld2 inclined in the same direction as the blade portion 242 in the development view of the raking auger 37. Figure 12 , the first straight lines Lc1 and Lc2 are indicated by dashed lines, and the second straight lines Ld1 and Ld2 are indicated by dashed double-dashed lines. Both the first straight lines Lc1 and Lc2 and the second straight lines Ld1 and Ld2 are lines extending along the spiral shape in the cylindrical auger body 241 .

[0193] exist Figure 11 In the example shown, the second finger 240B, the third finger 240C, the fifth finger 240E, and the seventh finger 240G are arranged along a first straight line Lc1 on the right side. Furthermore, the fourth finger 240D, the sixth finger 240F, the ninth finger 240I, and the tenth finger 240J are arranged along a first straight line Lc2 on the left side.

[0194] The third finger 240C, the fourth finger 240D, the seventh finger 240G, and the ninth finger 240I are arranged along the second straight line Ld1 on the right side, and the sixth finger 240F, the seventh finger 240H, the tenth finger 240J, and the eleventh finger 240K are arranged along the second straight line Ld2 on the left side.

[0195] exist Figure 12 In the expanded view shown, the raking fingers 240 arranged along the first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 are positioned on, or overlap, the straight lines. The arrangement of the raking fingers 240 relative to the straight lines is not limited to one in which the center of the raking fingers 240 is located on the straight lines (the center position may deviate from the straight lines).

[0196] In the developed view of the raking and gathering auger 37, the first straight lines Lc1 and Lc2 are parallel or substantially parallel to the straight line representing the main blade structure 451 of the right blade section 242R. That is, the inclination angles of the first straight lines Lc1 and Lc2 are the same as or substantially the same as the inclination angle α1 of the main blade structure 451 of the right blade section 242R. Similarly, the second straight lines Ld1 and Ld2 are parallel or substantially parallel to the straight line representing the main blade structure 451 of the left blade section 242L in the developed view of the raking and gathering auger 37.

[0197] In this embodiment, the inclination angle α1 of the main blade structure portion 451 of each of the left and right blade portions 242R and 242L is approximately 27°. In contrast, the inclination angles of the first straight lines Lc1, Lc2, and the second straight lines Ld1, Ld2 are each approximately 21°. The inclination angles of the first straight lines Lc1, Lc2, and the second straight lines Ld1, Ld2 are set, for example, within the range of ±10° relative to the inclination angle α1, and more preferably within the range of ±5° relative to the inclination angle α1.

[0198] According to the raking and gathering auger 37 of this embodiment having the above-described structure, similarly to the first embodiment, the structure of the raking and gathering auger 37 for raking the cut crops toward the feeder 30 can improve the crop collecting performance of the raking and gathering auger 37 .

[0199] The blade portion 242 of this embodiment includes a plurality of blade configurations 450 with different inclination angles. This configuration effectively changes the posture of the stalks conveyed to the left and right inwards by the raking auger 37 within the platform 31. This improves the stalk collection efficiency of the raking auger 37, enabling excellent collection, for example, in wheat harvesting operations involving a large amount of stalks.

[0200] Furthermore, the blade portion 242 includes a main blade structure portion 451 and a terminal blade structure portion 452 as a plurality of blade structures 450, with the terminal portion having a different inclination angle than the other portions. This structure effectively changes the posture of the stalks conveyed to the left and right inwards by the raking auger 37, thereby improving the efficiency of the stalk collection by the raking auger 37.

[0201] In addition, the blade portion 242 has the tip blade configuration portion 452 formed at a larger inclination angle than the main blade configuration portion 451. This configuration can more efficiently change the posture of the stalks conveyed to the left and right inner sides by the raking auger 37.

[0202] The raking auger 37 includes a right blade portion 242R and a left blade portion 242L as the blade portion 242. This structure allows the stems to be gathered from both the left and right sides of the platform 31 toward the receiving port 205 of the feeder 30, thereby achieving good conveyance performance when conveying the stems toward the feeder 30.

[0203] Furthermore, the right blade portion 242R and the left blade portion 242L are arranged so that the phases of the auger circumference are different from each other. In this embodiment, the left and right blade portions 242R and 242L are arranged so that the phases of the auger circumference are different from each other. With this configuration, the left and right blade portions 242R and 242L are arranged so that the phases of the stalks are 180 degrees different from each other. With this configuration, the stalks are collected at a position in front of the collection port 205 by the conveying action of the left and right blade portions 242R and 242L. This allows the stalks to be collected from both sides during one rotation of the raking auger 37, while the amount of stalks fed to the feeder 30 is uniform. This prevents the stalks from being concentrated in certain areas, thereby enabling efficient stalk conveyance.

[0204] Furthermore, the raking and gathering auger 37 has raking and gathering fingers 240 positioned on an extension line N1 of the distal ends of the left and right blades 242R and 242L. This configuration allows the distal blade structures 452 to exert a posture-changing effect on the stems. Furthermore, this allows the raking and gathering fingers 240 to more easily engage with stems that have fallen due to the posture change. This allows for efficient stem transport and improved stem collection.

[0205] In particular, in this embodiment, the raking fingers 240 located on the extension line N1 are raking fingers 240 that constitute the second finger row 402, which is smaller in number than the first finger row 401. With this structure, the spacing between the raking fingers 240 and the blades 242 is easily maintained near the tip of one blade 242 where the spacing between the left and right blades 242R and 242L is narrow, thereby preventing stem clogging and improving stem collection efficiency.

[0206] In this embodiment, the number of raking fingers 240 constituting the first finger row 401 is three, and the number of raking fingers 240 constituting the second finger row 402 is two. With this configuration, for example, when the opening E1 of the receiving port 205 is approximately 550 mm, the terminal blade structure 452 can be provided on the blade portion 242, and the number of raking fingers 240 can be increased efficiently. This prevents clogging of the grain stems and effectively improves the receiving performance.

[0207] In addition, in the present embodiment, according to each structure including a first finger-like member row 401 and a second finger-like member row 402 which are alternately arranged in the circumferential direction of the auger and have a constant finger-like member interval, and a structure in which a plurality of raking fingers 240 are arranged along a first straight line Lc1, Lc2 and a second straight line Ld1, Ld2 which are parallel or approximately parallel to the extension direction of the blade portion 242 in the expanded view of the raking auger 37, the same effect as the first embodiment can be obtained.

[0208] The combine harvester according to the present invention described above using the embodiment is not limited to the above embodiment, and various modes can be adopted within the scope consistent with the gist of the present invention.

[0209] The present technology can adopt the following structures. In addition, the structures described below can be selected and combined arbitrarily.

[0210] (1) A combine harvester comprising: a supply conveyor device provided in front of a threshing unit; and a raking auger provided in front of the supply conveyor device and used to rake crops toward the supply conveyor device, characterized in that:

[0211] The raking auger comprises: a cylindrical auger body, which sets the left and right directions of the body as the rotation axis direction; a spiral blade portion, which is provided on the outer peripheral surface of the auger body and applies a conveying effect on the crop in the direction of the rotation axis; and a plurality of raking fingers, which protrude from the outer peripheral surface.

[0212] As the rows of raking fingers arranged with a common position in the circumferential direction of the outer peripheral surface, the plurality of raking fingers located in front of the supply and conveying device among the plurality of raking fingers include: a first finger row consisting of a first number of the raking fingers; and a second finger row consisting of a second number of the raking fingers, which is less than the first number.

[0213] The first finger rows and the second finger rows are alternately arranged in the circumferential direction, and the intervals between the raking fingers adjacent to each other in the rotation axis direction are set to be constant or substantially constant.

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

[0215] The blade portion is provided so that the distance between the distal end of the blade portion in the conveying direction and the raking finger disposed closest to the distal end is the same as or substantially the same as the distance between the raking fingers.

[0216] (3) The combine harvester according to (1) or (2), characterized in that:

[0217] Among the plurality of raking fingers, the plurality of raking fingers located in front of the supply conveyor device are arranged in a staggered pattern.

[0218] (4) The combine harvester according to any one of (1) to (3), wherein the first number is four and the second number is three.

[0219] (5) The combine harvester according to (1) is characterized in that:

[0220] The blade portion includes a plurality of blade structure portions having different inclination angles with respect to the circumferential direction.

[0221] (6) The combine harvester according to (5), characterized in that:

[0222] The blade portion includes, as the blade configuration portion, a terminal blade configuration portion constituting a portion on a terminal side in a conveying direction of the blade portion.

[0223] (7) The combine harvester according to (6), characterized in that:

[0224] The tip blade structure portion is a portion having a larger inclination angle than the other blade structure portions.

[0225] (8) The combine harvester according to any one of (5) to (7), characterized in that:

[0226] As the blade portion, the raking auger has: a right blade portion, which is arranged on the right side of the auger main body and sets the direction of the conveying action to the left; and a left blade portion, which is arranged on the left side of the auger main body and sets the direction of the conveying action to the right.

[0227] (9) The combine harvester according to (8), characterized in that:

[0228] The right blade portion and the left blade portion are arranged so that their phases in the circumferential direction are different from each other.

[0229] (10) The combine harvester according to any one of (5) to (9), characterized in that:

[0230] At least one of the plurality of raking fingers is disposed on an extension line of a distal end portion of the blade portion in the conveying direction.

[0231] (11) The combine harvester according to any one of (5) to (10), wherein the first number is 3 and the second number is 2.

Claims

1. A combine harvester comprising: a supply conveyor device disposed in front of a threshing unit; and a raking auger disposed in front of the supply conveyor device and used to rake crops toward the supply conveyor device, wherein: The raking auger comprises: a cylindrical auger body, which sets the left and right directions of the body as the rotation axis direction; a spiral blade portion, which is provided on the outer peripheral surface of the auger body and applies a conveying effect on the crop in the direction of the rotation axis; and a plurality of raking fingers, which protrude from the outer peripheral surface. As a row of raking fingers arranged with a common position in the circumferential direction of the outer peripheral surface, the plurality of raking fingers located in front of the supply conveyor device among the plurality of raking fingers include: a first finger row consisting of a first number of the raking fingers; and a second finger row consisting of a second number of the raking fingers which is less than the first number, The first finger rows and the second finger rows are alternately arranged in the circumferential direction, and the intervals between the raking fingers adjacent to each other in the rotation axis direction are set to be constant or substantially constant.

2. The combine harvester according to claim 1, characterized in that The blade portion is provided so that the distance between the distal end of the blade portion in the conveying direction and the raking finger disposed closest to the distal end is the same as or substantially the same as the distance between the raking fingers.

3. The combine harvester according to claim 1 or claim 2, characterized in that: Among the plurality of raking fingers, the plurality of raking fingers located in front of the supply conveyor device are arranged in a staggered pattern.

4. The combine harvester according to claim 1, wherein: The first number is 4, and the second number is 3.

5. The combine harvester according to claim 1, wherein: The blade portion includes a plurality of blade structure portions having different inclination angles with respect to the circumferential direction.

6. The combine harvester according to claim 5, characterized in that The blade portion includes, as the blade configuration portion, a terminal blade configuration portion constituting a portion on a terminal side in a conveying direction of the blade portion.

7. The combine harvester according to claim 6, characterized in that The tip blade structure portion is a portion having a larger inclination angle than the other blade structure portions.

8. The combine harvester according to any one of claims 5 to 7, characterized in that: As the blade portion, the raking auger has: a right blade portion, which is arranged on the right side of the auger main body and sets the direction of the conveying action to the left; and a left blade portion, which is arranged on the left side of the auger main body and sets the direction of the conveying action to the right.

9. The combine harvester according to claim 8, characterized in that The right blade portion and the left blade portion are arranged so that their phases in the circumferential direction are different from each other.

10. The combine harvester according to claim 5, characterized in that At least one of the plurality of raking fingers is disposed on an extension line of a distal end portion of the blade portion in the conveying direction.

11. The combine harvester according to claim 5, characterized in that: The first number is 3, and the second number is 2.

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