Combine-harvester

Abstract

To provide a combine harvester having a structure including a raking auger for raking reaped crops into a supplying / conveying device, capable of improving a crop intake performance by the raking auger.SOLUTION: A raking auger for raking into a supplying / conveying device includes an auger body part 241, a spiral blade part 242 provided on an outer peripheral surface 241a of the auger body part 241, and a plurality of raking fingers 240. The plurality of raking fingers 240 located in front of the supplying / conveying device include, as raking finger rows disposed at a common circumferential position on the outer peripheral surface 241a, a first finger row 301 comprised of four raking fingers 240, and a second finger row 302 comprised of three raking fingers 240, where the first finger row 301 and the second finger row 302 are alternately disposed in the circumferential direction, and a dimension Δ K1 of an interval between adjacent raking fingers 240 in the rotational axis direction is constant or substantially constant.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a combine harvester having a raking auger for raking cut crops into a feeding and conveying device. [Background technology]

[0002] Conventionally, there is a combine harvester equipped with a raking auger for raking harvested crops into a supply conveying device in front of the supply conveying device that transports the harvested crops by the harvesting unit and supplies them to a threshing unit. A known raking auger has a cylindrical auger body with a rotation axis extending left and right, a spiral blade provided on the outer periphery of the auger body, and raking fingers, which are multiple rod-shaped portions protruding from the outer periphery of the auger body (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a configuration in which, of the plurality of rake-in fingers, the plurality of rake-in fingers located in front of the supply / conveyance device are arranged in a spiral shape along the spiral of the blade portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-62585 Summary of the Invention [Problem to be solved by the invention]

[0005] In a configuration equipped with a raking auger, the reaped stalks are collected from both the left and right sides to the center (the intake side of the supply and conveying device) by the feeding action of the raking auger with blades. The stalks collected to the center by the raking auger change their posture from the upright state before being reaped by the action of the raking fingers, etc., and are then taken into the supply and conveying device.

[0006] In a configuration in which culms are taken in by such a raking auger, for example, when the crop to be harvested is wheat, that is, when harvesting wheat, the volume of the culms is relatively large, so there are times when the raking fingers or the like are not able to sufficiently change the position of the culms. Insufficient change in the position of the culms due to the action of the raking fingers or the like causes a decrease in the ability of the raking auger to take in the culms.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a combine harvester equipped with a raking auger for raking harvested crops into a supply and conveying device, which can improve the crop intake performance of the raking auger. [Means for solving the problem]

[0008] The combine harvester of the present invention is a combine harvester comprising a supply and conveying device provided in front of the threshing section, and a raking auger provided in front of the supply and conveying device for raking crops into the supply and conveying device. The raking auger has a cylindrical auger main body with the left-right direction of the body as the rotational axis direction, a spiral blade portion provided on the outer surface of the auger main body for feeding the crops in the rotational axis direction, and a plurality of raking fingers protruding from the outer surface. Of the plurality of raking fingers, the plurality of raking fingers located in front of the supply and conveying device are arranged at common circumferential positions on the outer surface, and 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 that is less than the first number. The first finger row and the second finger row are arranged alternately in the circumferential direction, and the spacing between adjacent raking fingers in the rotational axis direction is constant or approximately constant.

[0009] In another aspect of the combine of the present invention, the blade portions are arranged so that the distance between the terminal end of the blade portion in the feed direction and the raking finger located closest to the terminal end is the same or approximately the same as the distance between the raking fingers.

[0010] In another aspect of the combine of the present invention, in the combine, among the plurality of raking fingers, the plurality of raking fingers located in front of the supply and conveying device are arranged in a staggered pattern.

[0011] A combine according to another aspect of the present invention is a combine wherein the first number is four and the second number is three.

[0012] A combine according to another aspect of the present invention is the combine described above, wherein the blade portion includes a plurality of blade components that have different inclination angles relative to the circumferential direction.

[0013] A combine according to another aspect of the present invention is a combine according to the above aspect, wherein the blade portion includes, as the blade component, a terminal blade component that forms a portion of the blade portion at the terminal end in the feed direction.

[0014] A combine according to another aspect of the present invention is the combine described above, wherein the terminal blade component is a portion in which the inclination angle is larger than that of the other blade components.

[0015] In another aspect of the combine of the present invention, the raking auger has, as the blade portions, a right blade portion provided on the right side of the auger main body and having the feeding action directed leftward, and a left blade portion provided on the left side of the auger main body and having the feeding action directed rightward.

[0016] In a combine harvester according to another aspect of the present invention, the right wing portion and the left wing portion are arranged with their phases in the circumferential direction different from each other.

[0017] A combine according to another aspect of the present invention is a combine in which at least one of the plurality of raking fingers is arranged on an extension of the terminal end of the blade portion in the feed direction.

[0018] A combine according to another aspect of the present invention is a combine wherein the first number is three and the second number is two. [Effects of the Invention]

[0019] According to the present invention, in a configuration including a raking auger for raking harvested crops into a supplying and conveying device, the crop intake performance of the raking auger can be improved. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a left side view of a combine harvester according to a first embodiment of the present invention. FIG. [Figure 2] 1 is a right side view of a combine harvester according to a first embodiment of the present invention. FIG. [Figure 3] 1 is a plan view of a combine harvester according to a first embodiment of the present invention. [Figure 4] 1 is a diagram showing a power transmission configuration in a combine harvester according to a first embodiment of the present invention. FIG. [Figure 5] FIG. 2 is a front perspective view of the reaping unit according to the first embodiment of the present invention. [Figure 6] FIG. 1 is a plan view of a scraping auger according to a first embodiment of the present invention. [Figure 7] 1 is a cross-sectional view of a raking auger according to a first embodiment of the present invention. [Figure 8] 1 is a plan view showing the internal structure of a scraping auger according to a first embodiment of the present invention. FIG. [Figure 9]1 is a development view of a scraping auger, schematically illustrating the configuration of the scraping auger according to a first embodiment of the present invention. FIG. [Figure 10] 1 is a development view of a scraping auger, schematically illustrating the configuration of the scraping auger according to a first embodiment of the present invention. FIG. [Figure 11] FIG. 6 is a development view of a scraping auger that schematically shows the configuration of a scraping auger according to a second embodiment of the present invention. [Figure 12] FIG. 6 is a development view of a scraping auger that schematically shows the configuration of a scraping auger according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention aims to improve the structure of the harvesting auger for raking harvested crops into a feeding and conveying device, thereby achieving good crop collection performance by the harvesting auger. The following describes an embodiment of the present invention.

[0022] [First embodiment] The overall configuration of a combine harvester 1 according to a first embodiment of the present invention will be described using Figures 1 to 5. In the following description, the left side (lower side in Figure 3) and the right side (upper side in Figure 3) when facing the front of the combine harvester 1 will be referred to as the left side and right side of the combine harvester 1, respectively.

[0023] As shown in Figures 1 and 2, the combine harvester 1 according to this embodiment is a conventional combine harvester that rakes harvested field crops (rice, wheat, soybeans, corn, etc.) into the machine body, threshes, sorts, stores the grain, and can then be transported outside the machine as needed. The combine harvester 1 has a self-propelled traveling body 2 and a reaping unit 3 attached to the front end of the traveling body 2. The reaping unit 3 is configured as a reaping device that harvests and collects unharvested stalks of rice, wheat, etc., and is attached to the traveling body 2 so that it can be raised and lowered.

[0024] The traveling machine 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 machine body frame 6 is provided above and between the left and right crawler units 5, 5. Each crawler unit 5 has multiple rotating bodies including a drive sprocket 5a provided at its front end, and tracks 5c wound around these rotating bodies. The drive sprocket 5a is rotated by power transmitted from an engine 25 provided in the combine 1.

[0025] On the left side of the machine frame 6, there are provided a threshing unit 7 that threshes the stalks cut and supplied by the reaping unit 3, and a sorting unit 8 that sorts the grains threshed by the threshing unit 7. The threshing unit 7 and the sorting unit 8 are arranged with the threshing unit 7 on the upper level and the sorting unit 8 on the lower level.

[0026] On the machine frame 6, to the right of the threshing section 7 and the sorting section 8, there is provided a grain storage section 9 having a grain tank 10 that stores the grain (clean grain) sorted by the sorting section 8. A lower discharge conveyor 11 is provided within the grain tank 10 to transport the stored grain toward the discharge outlet of the grain tank 10 (see Figure 4). A vertical transport conveyor 12 is installed upright in the vertical direction so as to communicate with the discharge outlet of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end of the vertical transport conveyor 12. The grain discharge conveyor 13 is installed so as to be rotatable horizontally and swingable up and down around a horizontal axis. These conveyors transport the grain in the grain tank 10, and the grain is discharged into a truck bed, a container, etc. from a paddy discharge port 14 installed at the tip of the grain discharge conveyor 13.

[0027] A driver's section 15, where an operator sits, is provided on the machine frame 6 in front of the grain storage section 9, that is, at the front right side of the machine frame 6. The driver's section 15 is covered by a cabin 16. The driver's section 15 is provided with a driver's seat 17, a control handle 18 located in front of the driver's seat 17, and various operating sections such as a main speed change lever 19, an auxiliary speed change lever, and a work clutch lever (see Figure 2). The work clutch lever is a work operating tool for switching on and off the threshing clutch 57 and the reaping clutch 75 (see Figure 4).

[0028] An engine 25 serving as a drive source is provided below the driver's section 15 on the machine frame 6. The engine 25 is installed in the space below the driver's section 15, in the space on the right side of the front part of the machine frame 6. The engine 25 is, for example, a diesel engine.

[0029] The reaping unit 3 will now be described. The reaping unit 3 has a feeder 30 as a supply and conveyance device, a platform 31 as a grain header, a cutting blade device 32, a pair of left and right grass dividing bodies 33, 33, and a raking reel 34. For convenience, the raking reel 34 is not shown in Figure 5.

[0030] The feeder 30 transports the stalks harvested by the harvesting section 3 and supplies them to the threshing section 7. The feeder 30 has a feeder house 35 as a housing and a conveyor 36 (see Figure 4) for transporting the stalks provided within the feeder house 35. The feeder house 35 is configured in a roughly rectangular cylindrical shape with the longitudinal direction extending in the front-to-rear direction in a plan view. The feeder 30 is located to the left of the cabin 16, and the rear end opening of the feeder house 35 is connected to the front handling opening 7a of the threshing section 7.

[0031] The conveyor 36 is a chain conveyor having chains 95 installed parallel to each other on both the left and right sides inside the feeder house 35, and multiple slats 96 installed between the left and right chains 95 (see Figure 4). The conveyor 36 has a reaping unit input shaft (feeder house conveyor shaft) 38, which is installed in front of the threshing unit 7 and has an axial direction in the left-right direction, as a drive shaft supporting the feeding end side of the conveyor 36. The conveyor 36 has the rear portion of the chain 95 wound around a sprocket 97 fixed to the reaping unit input shaft 38.

[0032] Meanwhile, the front portion of the chain 95 is wound around a cylindrical front drum 98 provided at the front end of the feeder house 35. The front drum 98 is rotatably supported around a conveyor driven shaft 98a, which is a rotating shaft supported between the left and right side portions of the feeder house 35. In other words, the chain 95 is endlessly wound around the sprocket 97 and the front drum 98, and the rotation of the sprocket 97 accompanying the rotation of the reaping unit input shaft 38 drives the chain 95 to move the slats 96 while maintaining the wound state.

[0033] The rear end of the feeder 30 is supported rotatably relative to the traveling machine body 2, with the reaping unit input shaft 38 as the rotation axis. In addition, a lifting cylinder 39 (see FIG. 1), which is a hydraulic cylinder, is interposed between the underside of the feeder house 35 and the machine body frame 6.

[0034] The reaping unit 3 is configured to move up and down by the rotation of the feeder 30 relative to the traveling body 2 as the lifting cylinder 39 extends and retracts. By the lifting and lowering operation of the reaping unit 3, the reaping unit 3 moves up and down around the reaping unit input shaft 38 as a pivot shaft, thereby adjusting the height of the reaping unit 3. The lifting and lowering operation of the reaping unit 3 is operated by a predetermined operating unit provided in the driving unit 15.

[0035] The platform 31 is configured in the shape of a horizontally elongated bucket and is connected to the front side of the feeder 30 so as to communicate with the front end opening of the feeder house 35. The platform 31 has a left side wall portion 201, a right side wall portion 202, a rear wall portion 203, and a bottom portion 204, and forms a space with the front and top open as a space for inputting the straw.

[0036] The rear wall 203 has a horizontal frame 203a made of a square pipe-shaped member that forms the upper edge of the rear wall 203, and a rear wall surface 203b provided below the horizontal frame 203a (see FIG. 5). An inlet 205 is formed in the rear wall 203, facing the front end opening of the feeder house 35. The inlet 205 has a rectangular opening shape that corresponds to the shape of the front end opening of the feeder house 35.

[0037] The feeder house 35 is provided on the platform 31 at a position slightly to the left of the center in the left-right direction, and the inlet 205 opens into the platform 31 at a position slightly to the left of the center in the left-right direction. In detail, the inlet 205 is provided so as to open an area substantially the same as the second-left area of ​​the rear wall portion 203 divided into four equal parts in the left-right direction.

[0038] A sweeping auger (platform auger) 37 is provided within the platform 31. The sweeping auger 37 is axially mounted between the left side wall 201 and the right side wall 202 of the platform 31 so as to be rotatable with the left-right direction as the rotation axis. The sweeping auger 37 has both left and right ends pivotally supported by the left side wall 201 and the right side wall 202, respectively.

[0039] The cutting blade device 32 is mounted on the front lower edge of the platform 31 and is configured like a pair of clippers. A pair of left and right grass dividing bodies 33, 33 are mounted so as to protrude forward from the left and right sides of the front of the platform 31. The raking reel 34 is a reel with a tine bar and is mounted in a position above and in front of the raking auger 37. The raking reel 34 is supported rotatably with the left and right directions as the rotation axis between the tips of a pair of left and right reel support arms 34a, 34a whose base ends are pivotally supported on the platform 31. As it rotates, the raking reel 34 continuously acts on the pod-bearing portions of the stalks and rakes the pod-bearing portions of the stalks toward the raking auger 37. The operation of each part of the reaping unit 3 uses power from the engine 25, transmitted via various transmission mechanisms.

[0040] A front rotor 26 is provided behind the feeder 30 to send the stalks transported by the conveyor 36 into the threshing opening 7a. The front rotor 26 is provided between the end of the conveyor 36 and the threshing opening 7a. The front rotor 26 has a roughly cylindrical rotor body 27, also known as a beater, and a front rotor shaft 28 (see Figure 4) whose axial direction is in the left-right direction. The stalks transported by the feeder 30 are fed from the end of the conveyor 36 by the front rotor 26 through the threshing opening 7a and into the threshing chamber 7b of the threshing section 7.

[0041] The threshing section 7 and the sorting section 8 will now be described. The threshing section 7 has a threshing drum 40 provided in a threshing chamber 7b with a threshing opening 7a opening 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.

[0042] The threshing drum 40 is rotatably supported by a threshing drum shaft 41 (see Figure 4) whose axial direction is the front-to-rear direction. On the upper side of the threshing drum 40, multiple angle-adjustable dust-transfer valves are provided to adjust the transport speed (retention time) of the de-grained grains in the threshing chamber. A receiving net 42 is provided along the outer peripheral surface of the lower part of the threshing drum 40 to allow the grains to drop through.

[0043] The sorting section 8 has a swinging sorting plate 43 as a swinging section arranged below the receiving net 42, a swinging mechanism 44 including a swinging shaft 44a that swings the swinging sorting plate 43 by rotational power from a drive source, a first conveyor 45, a second conveyor 46, and a winnower 47 (see Figure 4). As shown in Figure 4, a pre-fan 71 is provided in front of the winnower 47, and a second fan 72 is provided behind the winnower 47.

[0044] The oscillating sorting plate 43 has components for gravity sorting, such as a feed pan, a chaff sieve located behind the feed pan to adjust the amount of grain leakage, and a grain sieve located below the chaff sieve. The first conveyor 45 is located in the first trough extending in the width direction of the machine body to collect the first grains. The second conveyor 46 is located behind the first conveyor 45 in the second trough extending in the width direction of the machine body to collect the second grains. The winnower 47 blows sorting air from the front lower to the rear upper to the oscillating sorting plate 43.

[0045] A return conveyor 48 is provided on the right side of the machine body where the threshing section 7 and sorting section 8 are located (see Figure 4). The return conveyor 48 is connected to the second conveyor 46 with its lower end located near the second conveyor 46, and its upper end is located near the front end of the threshing drum 40, extending in an upward-facing incline. A grain lifting conveyor 49 extending vertically is provided to the right of the return conveyor 48. The grain lifting conveyor 49 transports the first grain sent by the first conveyor 45 into the grain tank 10.

[0046] The combine harvester 1 having the above-described configuration raises the reaping unit 3 to a desired height above the ground (the height at which the culms, which are the harvested crops, are to be reaped) in a field by raising and lowering the feeder 30 with the reaping unit input shaft 38 as the center (support shaft), changes from a non-working state to a working state, and travels in this state using the traveling body 2. As a result, the combine harvester 1 separates the harvested crop into reaping targets and non-reaping targets using the left and right dividing bodies 33, 33, and raks in the pod-bearing portions of the culms on the tip side of the reaping targets using the raking reel 34 while reaping the pod-bearing portions of the culms using the cutting blade device 32.

[0047] The pod-bearing portions of the stalks harvested at the desired harvesting position are raked into the platform 31 by the rotating raking auger 37. The stalks raked into the platform 31 are collected near the intake port 205 within the platform 31 by the feeding action of the raking auger 37, and are taken into the feeder house 35 from the intake port 205. The stalks taken into the feeder house 35 are transported by the conveyor 36 through the feeder house 35, and are then thrown into the threshing port 7a by the front rotor 26 and supplied to the threshing section 7.

[0048] The pod-bearing portions of the stalks supplied to the threshing section 7 are threshed by the threshing section 7. Specifically, the stalks supplied to the threshing section 7 are transported rearward by the rotating threshing drum 40 and threshed mainly between the threshing drum 40 and the receiving net 42. Grains that are smaller than the mesh size of the receiving net 42 leak through the receiving net 42. Straw chips that do not leak through the receiving net 42 are discharged into the field through a dust outlet located at the rear of the sorting section 8 by the transporting action of the threshing drum 40.

[0049] Meanwhile, the grains that have been threshed in the threshing section 7 and that have leaked through the receiving net 42 are sorted in the sorting section 8. Specifically, the threshed grains that have been threshed in the threshing drum 40 and that have leaked through the receiving net 42 are sorted by gravity sorting action by the oscillating sorting plate 43 and wind sorting action by the winnower 47 into refined grains and other grains (first grade), a mixture of grains such as grains with stalks and straw (second grade), and straw chips, etc., and are removed.

[0050] The grains (first grain) that fall from the oscillating sorting plate 43 after sorting in the sorting section 8 are transported to the grain tank 10 by the first conveyor 45 and the connected grain lifting conveyor 49. The second grains are returned to the threshing start end of the threshing drum 40 by the second conveyor 46 and the connected return conveyor 48, and are threshed again. Straw dust and the like are discharged into the field from a dust outlet provided at the rear of the sorting section 8.

[0051] Next, the power transmission configuration of the combine harvester 1 according to this embodiment will be described with reference to Figure 4. The combine harvester 1 uses rotational power from an engine 25 to drive the reaping unit 3, traveling unit 4, threshing unit 7, sorting unit 8, and grain storage unit 9.

[0052] 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 unit 4, the threshing unit 7, the sorting unit 8, and the reaping unit 3. The rotational power of the second output shaft 25b is transmitted to the grain storage unit 9. The engine 25 also has a work implement pump shaft that drives a charge pump 54 that operates the lifting cylinder 39 and the like.

[0053] Regarding the power transmission system to the traveling unit 4, the rotational power of the first output shaft 25a is transmitted to the HST input shaft 52 by the first belt transmission mechanism 51 and input to the transmission 53, which includes the traveling HST and the swing HST. Here, "HST" refers to a hydraulic continuously variable transmission that uses a system in which hydraulic pressure generated by driving a hydraulic pump is converted back into rotational power by a hydraulic motor. The driving force of the transmission 53 rotates the drive sprocket 5a of the crawler unit 5 that constitutes the traveling unit 4.

[0054] Regarding the power transmission system to the threshing unit 7, the rotational power of the first output shaft 25a is transmitted to the threshing unit input shaft 56 by a 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 intermittently as desired.

[0055] The rotational power of the threshing unit input shaft 56 is transmitted to the threshing drum input shaft 59 by a third belt transmission mechanism 58. The rotational power of the threshing drum input shaft 59 is transmitted to the threshing drum shaft 41 via a threshing speed change device 60. The threshing speed change device 60 changes the speed of the rotational power input from the threshing drum input shaft 59 to the threshing drum shaft 41, for example, between two stages, high speed and low speed.

[0056] With this configuration, the driving force of the engine 25 is transmitted to the threshing unit 7. Then, by operating the work clutch lever provided on the driving unit 15, the threshing clutch 57 is turned ON / OFF, thereby interrupting the transmission of power to the threshing unit 7.

[0057] With regard to the power transmission system to the sorting section 8, the threshing section input shaft 56 has a support shaft portion for the winnower 47, and the rotational power of the threshing section input shaft 56 is transmitted to a pulley rotor 63 journaled on a threshing intermediate shaft 62 by a fourth belt transmission mechanism 61. The rotational power of the pulley rotor 63 is transmitted to the pre-fan 71 and the winnower 47 by a predetermined transmission mechanism. In addition, the rotational power of the threshing section input shaft 56 is transmitted to the respective rotational shafts of the first conveyor 45, the second fan 72 and the second conveyor 46 by a predetermined transmission mechanism.

[0058] The rotational power of the first conveyor 45 is transmitted to the grain lifting conveyor 49 by a predetermined transmission mechanism. The rotational power of the second conveyor 46 is transmitted to the swing shaft 44a of the swing mechanism 44 by a fifth belt transmission mechanism 64. The rotational power of the second conveyor 46 is transmitted to the return conveyor 48 via a bevel gear.

[0059] With regard to the power transmission system to the reaping unit 3, the rotational power of the pulley rotor 63 is transmitted to the front rotor shaft 28 by a sixth belt transmission mechanism 73. The sixth belt transmission mechanism 73 is provided with a reaping clutch 75 that optionally 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 reaping unit input shaft 38 by a first chain transmission mechanism 65. The rotational drive of the reaping unit input shaft 38 operates the conveyor 36 in the feeder house 35.

[0060] The rotational power of the cutting unit input shaft 38 is transmitted to a PF (platform) drive shaft 67 by a second chain transmission mechanism 66. The rotational power of the PF drive shaft 67 is transmitted to a PF auger shaft 37a that rotates the sweeping auger 37 via a third chain transmission mechanism 68. The rotational power of the PF drive shaft 67 is also transmitted to a cutting blade drive shaft 32a that drives the cutting blade device 32 via a seventh belt transmission mechanism 69. The rotational power of the PF drive shaft 67 is also transmitted to a reel shaft 34b that rotates the sweeping reel 34 by a fourth chain transmission mechanism 76 that includes a reel counter shaft 70.

[0061] With this configuration, the driving force of the engine 25 is transmitted to the reaping unit 3. Then, by operating the work clutch lever provided on the driving unit 15, the reaping clutch 75 is turned on / off, thereby connecting and disconnecting the power transmission to the reaping unit 3.

[0062] With regard to the power transmission system to the grain storage section 9, the rotational power of the second output shaft 25b is transmitted to the lower discharge conveyor 11 by a power transmission mechanism including a grain tank intermediate shaft 77, and the rotational power of the lower discharge conveyor 11 is transmitted to the vertical transport conveyor 12 via a bevel gear. The rotational power of the vertical transport conveyor 12 is transmitted to the grain discharge conveyor 13 by a predetermined transmission mechanism. The grain storage section 9 is equipped with a suction fan 78 and a compressor 79, which are driven by the rotational power transmitted from the grain tank intermediate shaft 77.

[0063] As described above, the combine harvester 1 includes the feeder 30 provided in front of the threshing section 7 and the raking auger 37 provided in front of the feeder 30 for raking the crop into the feeder 30. The configuration of the raking auger 37 according to this embodiment will be described below with reference to Figures 5 to 9.

[0064] Fig. 7 is a cross-sectional view taken along the line AA in Fig. 6. Fig. 9 is a development in which peripheral wall portion 243 is developed in the circumferential direction for a portion of the rotation axis direction of take-in auger 37, and is a diagram schematically illustrating each component of take-in auger 37. Fig. 9 is a development in which the left portion of take-in auger 37 is developed, including a portion corresponding to the formation range of inlet 205 of feeder 30 in the rotation axis direction (see opening range E1).

[0065] 9, the short side direction (vertical direction) of the rectangular shape representing the outline of the developed view corresponds to an angular range of 360° in the circumferential direction of the auger main body 241. In addition, in the developed view shown in FIG. 9 etc., the circular shape representing the sweeping finger 240 corresponds to the sweeping finger 240 projected onto the outer peripheral surface 241a, and the straight line representing the blade portion 242 corresponds to the formation position of the blade portion 242 on the outer peripheral surface 241a.

[0066] As shown in Figures 5, 6 and 7, the sweeping auger 37 has a cylindrical auger main body 241 whose rotation axis is in the left-right direction of the body, spiral blade portions 242 (242L, 242R) provided on the outer peripheral surface 241a of the auger main body 241, and a plurality of sweeping fingers 240 protruding from the outer peripheral surface 241a of the auger main body 241.

[0067] The raking auger 37 has a rotation axis C1 that is a left-right axis that coincides with the central axis of the cylindrical shape of the auger main body 241. The raking auger 37 rotates counterclockwise when viewed from the left side (see arrow F1 in Figure 7), and uses the blades 242 to provide a feeding action to the stalks fed into the platform 31, sending the stalks into the intake port 205 (see Figure 5). Hereinafter, the direction of the rotation axis of the raking auger 37 (auger main body 241) will be referred to as the "auger axis direction."

[0068] The auger main body 241 has an outer diameter and length that fit within the space within the platform 31. The auger main body 241 has a length that is approximately the same as the dimension between the left side wall 201 and the right side wall 202 of the platform 31, and is provided so as to cover approximately the entire interior of the platform 31 in the left-right direction. The auger main body 241 has a peripheral wall 243 that forms an outer peripheral surface 241a, and a left end surface 244 and a right end surface 245 that are both surfaces perpendicular to the rotation axis C1, and these surfaces form a cylindrical space, forming a hollow portion.

[0069] The blade portion 242 is a portion that applies a feeding action to the crops in the auger axial direction. The blade portion 242 is a plate-like portion that forms a spiral shape centered on the rotation axis C1 along the outer peripheral surface 241a of the auger main body 241. The blade portion 242 is provided by fixing a spiral-shaped plate-like member to the outer peripheral surface 241a of the auger main body 241 by welding or the like. Approximately triangular rib plates 246 are provided at appropriate intervals on the blade portion 242 as reinforcing members that reinforce the support strength of the outer peripheral surface 241a.

[0070] The sweeping auger 37 has, as blades 242, a right blade 242R serving as a first blade provided on the right side of the auger body 241, and a left blade 242L serving as a second blade provided on the left side of the auger body 241. The right blade 242R is a blade 242 whose feed action direction in the auger axial direction is leftward, and the left blade 242L is a blade 242 whose feed action direction is rightward.

[0071] The left blade 242L and the right blade 242R are each provided to form an integral, continuous spiral shape. The right blade 242R is provided over a range of more than half (approximately 3 / 5 to 2 / 3) of the overall length of the auger body 241 from the right end of the auger body 241 in the left-right direction. The left blade 242L is provided over a range of approximately 1 / 5 of the overall length of the auger body 241 from the left end of the auger body 241 in the left-right direction.

[0072] 6, the sweeping auger 37 is divided into three regions in the left-right direction: a right blade portion-forming region D1, which is the region where the right blade portion 242R is formed; a left blade portion-forming region D2, which is the region where the left blade portion 242L is formed; and a blade portion non-forming region D0, which is the region between these regions and where the blade portion 242 is not formed. The blade portion non-forming region D0 is included within the opening range E1 of the inlet 205 of the feeder 30 in the left-right direction and is located in the middle of the opening range E1. In other words, the portion of the sweeping auger 37 that is the blade portion non-forming region D0 is located in front of the inlet 205. By way of example only, the dimension of the opening range E1 is approximately 550 mm.

[0073] Right wing 242R and left wing 242L have a substantially constant protruding height from outer peripheral surface 241a and are provided at a substantially constant pitch. In this embodiment, the number of turns of right wing 242R is approximately 3, and the number of turns of left wing 242L is approximately 1. However, the number of turns and pitch of each wing are not particularly limited.

[0074] As described above, the raking auger 37 has, as blades 242, a right blade 242R provided on the right side of the auger body 241 in front of the feeder 30 (hereinafter referred to as the "feeder front portion"), and a left blade 242L provided on the left side of the auger body 241 in front of the feeder 30. The left blade 242L is formed over a shorter range in the left-right direction than the right blade 242R. This asymmetric configuration of the left and right blades 242 corresponds to the arrangement of the feeder 30 closer to the left side of the platform 31. The feeder front portion of the auger body 241 is a portion that corresponds to the opening range E1 of the inlet 205 of the feeder 30 in the left-right direction.

[0075] In this configuration, when the raking auger 37 rotates counterclockwise as viewed from the left side (see arrow F1 in Figure 7), the right blade 242R and the left blade 242L transport the stalks fed into the platform 31 laterally toward the inlet 205. That is, the right blade 242R transports the stalks fed into the right side of the platform 31 toward the left side, which is the blade non-forming area D0 side, and the left blade 242L transports the stalks fed into the left side of the platform 31 toward the right side, which is the blade non-forming area D0 side.

[0076] The sweeping finger 240 is formed from a straight rod-shaped member that penetrates the peripheral wall 243 of the auger body 241 and protrudes from the outer circumferential surface 241a. A resin slide bush 247 is provided at the penetration portion of the peripheral wall 243 for the sweeping finger 240. The slide bush 247 has a through hole that allows the sweeping finger 240 to penetrate, and is attached to the peripheral wall 243 with a fastener such as a bolt 247a. The sweeping finger 240 is supported by the slide bush 247 while passing through the slide bush 247.

[0077] As shown in Fig. 8, the sweeping finger 240 is supported via a support boss 251 to be rotatable relative to a finger support shaft 250 (250A, 250B) provided inside the auger main body 241. As shown in Figs. 7 and 8, the support boss 251 has a cylindrical shaft support portion 251a through which the finger support shaft 250 passes, and a cylindrical finger support portion 251b that fixes and supports the base end of the sweeping finger 240 with it inserted therein. The sweeping finger 240 is fastened to the support boss 251 with a bolt 252 and a nut 253 that pass through the base end of the sweeping finger 240 and the finger support portion 251b.

[0078] The finger support shaft 250 is a linear rod-shaped shaft with its axial direction extending in the left-right direction, and is an eccentric shaft with its axis C2, which is its center line, positioned eccentrically with respect to the rotation axis C1 of the sweeping auger 37. The axis C2 of the finger support shaft 250 is positioned forward and below the rotation axis C1 of the sweeping auger 37 (see FIG. 7). The finger support shaft 250 is a fixed shaft whose position relative to the rotation axis C1 is constant.

[0079] When viewed in the axial direction of the axis C2, the sweeping finger 240 extends radially outward from the finger support shaft 250 along the radial direction of a circumferential shape centered on the axis C2. The sweeping finger 240 has a base end supported on the finger support shaft 250 by a support boss 251, and a tip end penetrates a slide bush 247, so that the sweeping finger 240 is installed between the finger support shaft 250 and the peripheral wall portion 243.

[0080] The sweeping auger 37 is configured such that the sweeping fingers 240 protrude from and retract into the peripheral wall portion 243 as the sweeping auger 37 rotates about the rotation axis C1 due to the eccentric structure of the finger support shaft 250. When the sweeping fingers 240 protrude from and retract into the peripheral wall portion 243, the through holes of the slide bushes 247 serve as support holes that allow the sweeping fingers 240 to slide.

[0081] That is, the sweeping finger 240 is rotatably supported by the support boss 251 relative to the finger support shaft 250, and is supported by the peripheral wall portion 243 via the slide bush 247, and rotates together with the peripheral wall portion 243 about the axis C2, thereby protruding from and retracting from the peripheral wall portion 243. When viewed in the axial direction of the rotation axis C1, the amount of protrusion of the sweeping finger 240 from the peripheral wall portion 243 (hereinafter referred to as the "finger protrusion amount") is greatest at the front position among positions along the straight line connecting the rotation axis C1 and the axis C2 in the extension direction of the sweeping finger 240, and is smallest at the rear position, which is in the opposite phase, of the positions in the circumferential direction centered on the rotation axis C1.

[0082] In the example shown in Figure 7, the position of the sweeping finger 240 facing forward and downward (slightly downward) with respect to the position of the axis C2 is the position where the finger protrusion amount is maximum, and the opposite position, i.e., the position of the sweeping finger 240 facing rearward and upward (slightly upward) with respect to the position of the axis C2 is the position where the finger protrusion amount is minimum. The maximum finger protrusion amount is about two-thirds of the total length of the sweeping finger 240. With the finger protrusion amount at its minimum, the tip of the sweeping finger 240 is positioned within the through-hole of the slide bush 247. In Figure 7, the trajectory S1 of the tip of the sweeping finger 240 is shown by a two-dot chain line.

[0083] As shown in Figure 8, the scraping auger 37 is supported rotatably around the rotation axis C1 between the right side wall portion 202 and the left side wall portion 201 of the platform 31 by a rotating support shaft 261 that supports the right side of the scraping auger 37 and a fixed support shaft 262 that supports the left side of the scraping auger 37.

[0084] The rotation support shaft 261 is provided at the right end of the sweeping auger 37 so that its axis coincides with the rotation axis C1, and its right end protrudes rightward from the right end surface 245 of the auger main body 241. The rotation 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 rotation support shaft 261 passes and which is fixed to the rotation support shaft 261, and is fixed to the outer left and right sides (right side) of the right end surface 245 with fasteners such as bolts.

[0085] The rotation support shaft 261 penetrates a first intermediate support plate 265 provided to the left 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 rotation support shaft 261 is fixed to the first intermediate support plate 265 via an attachment plate 266. The attachment plate 266 is a plate-shaped member through which the rotation support shaft 261 penetrates and is fixed to the rotation support shaft 261, and is fixed to the outer lateral side (right side) of the first intermediate support plate 265 with fasteners such as bolts. In this way, the rotation support shaft 261 is fixed to the right end surface portion 245 and the first intermediate support plate 265, so that it rotates integrally with the auger main body portion 241.

[0086] The right end of the rotating support shaft 261 is rotatably supported on the right side wall portion 202 via a mounting plate 267 and a bearing member 268 such as a bearing. The mounting plate 267 is a plate-shaped member that rotatably supports the rotating support shaft 261 via the bearing member 268, and is fixed to the outer side (right side) of the right side wall portion 202 with a fastener such as a bolt. A disc-shaped winding prevention plate 269 is provided on the inner side (left side) of the right side wall portion 202 so as to close the opening edge on the right side of the peripheral wall portion 243. The winding prevention plate 269 is fastened and fixed to the right side wall portion 202 together with the mounting plate 267 with a fastener. A sprocket 259 that constitutes the third chain transmission mechanism 68 is fixed to the portion of the rotating support shaft 261 that protrudes to the right from the right side wall portion 202.

[0087] The base end of a first connecting arm 271 is supported so as to be relatively rotatable on the left end of the rotation support shaft 261 that penetrates the first intermediate support plate 265. The first connecting arm 271 is provided so as to be perpendicular to the axial direction of the rotation support shaft 261. The right end of the first finger support shaft 250A, which is located on the right side of the finger support shafts 250, is supported on the tip end of the first connecting arm 271 so as not to be relatively rotatable.

[0088] A second intermediate support plate 272 is provided to the left of the first intermediate support plate 265, and is located approximately in the center in the left-right direction of the auger main 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, whose axis coincides with the rotation axis C1, is supported by the second intermediate support plate 272 via a bearing member 276 such as a bearing so as to be rotatable relative to the second intermediate support plate 272.

[0089] The left end of first finger support shaft 250A is connected to the right end of intermediate support shaft 275 via second connecting arm 277. Second connecting arm 277 is connected to both intermediate support shaft 275 and first finger support shaft 250A by fixing bolt 277a so as not to rotate relative to both shafts of intermediate support shaft 275 and first finger support shaft 250A. Fixing bolt 277a passes through second connecting arm 277 in the longitudinal direction and also passes through both shafts of intermediate support shaft 275 and first finger support shaft 250A in the radial direction, and is threadedly engaged with nut 277b.

[0090] The left end of the intermediate support shaft 275 is connected to the right end of the second finger support shaft 250B, which is located on the left side of the finger support shafts 250, via a third connecting arm 278, through a structure that is approximately bilaterally symmetrical to the connecting structure of the first finger support shaft 250A via the second connecting arm 277. The third connecting arm 278 is connected to both the intermediate support shaft 275 and the second finger support shaft 250B by a fixing bolt 278a so as not to rotate relative to each other. The fixing bolt 278a passes through the third connecting arm 278 in the longitudinal direction and also passes through both the intermediate support shaft 275 and the second finger support shaft 250B in the radial direction, and is threadedly engaged with a nut 278b.

[0091] The right end of the fixed support shaft 262 is connected to the left end of the second finger support shaft 250B via a fourth connecting arm 279. The fourth connecting arm 279 is connected to both the second finger support shaft 250B and the fixed support shaft 262 by a fixing bolt 279a so as not to rotate relative to each other. The fixing bolt 279a passes through the fourth connecting arm 279 in the longitudinal direction and also passes through both the second finger support shaft 250B and the fixed support shaft 262 in the radial direction, and is threadedly engaged with a nut 279b.

[0092] The left end of the fixed support shaft 262 is fixed to the left side wall portion 201 via an attachment plate 280. The attachment plate 280 is a plate-shaped member through which the fixed support shaft 262 passes and which is fixed to the fixed support shaft 262, and is located on the outer side (left side) of the left side wall portion 201. The attachment plate 280 is fastened together with the inner side plate 284 (see FIG. 6 ) by a fastener and fixed to the left side wall portion 201 in a state in which the attachment plate 280 sandwiches the left side wall portion 201 together with the inner side plate 284 which is located on the inner side (right side) of the left side wall portion 201 and fixed to the fixed support shaft 262. A disc-shaped winding prevention plate 281 is provided on the inner side (right side) of the left side wall portion 201 so as to close the opening edge on the left side of the peripheral wall portion 243. The winding prevention plate 281 is fastened together with the attachment plate 280 by a fastener and fixed to the left side wall portion 201. The fixed support shaft 262 is supported by a left end surface 244 that forms part of the auger main body 241 so as to be rotatable relative to the left end surface 244 while passing through the left end surface 244 via a bearing member 282 such as a bearing.

[0093] In the above configuration, a shaft structure including, from left to right, 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 a portion fixedly provided to 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 rotary support shaft 261 that is rotatably provided to the right side wall 202. The auger main body 241, the blades 242, and the rotary support shaft 261 form a rotating portion that rotates integrally about the rotation axis C1 relative to the fixed shaft structure, and the multiple sweeping fingers 240 form an eccentric rotating portion that rotates about the axis C2 at an eccentric position in conjunction with the rotation of the above rotating portion.

[0094] In the above configuration, first finger support shaft 250A and second finger support shaft 250B each support a sweeping finger 240. As shown in Fig. 8, in this embodiment, one sweeping finger 240 is provided on first finger support shaft 250A, and fifteen sweeping fingers 240 are provided on second finger support shaft 250B, for a total of sixteen sweeping fingers 240.

[0095] First finger support shaft 250A is provided with sweeping finger 240 at its right end. Second finger support shaft 250B is provided with 14 sweeping fingers 240 arranged adjacent or close to each other in the axial direction of finger support shaft 250 from its right end to its left side, with one sweeping finger 240 at its left end. Hereinafter, for the convenience of identifying sweeping fingers 240, the 16 sweeping fingers 240 will be referred to as first to sixteenth fingers 240a to 240p in order from right to left. That is, first finger 240a is provided on first finger support shaft 250A, and second to sixteenth fingers 240b to 240p are provided on second finger support shaft 250B.

[0096] The slide bushes 247 supporting the respective sweeping fingers 240 are provided at 90° intervals around the circumferential direction of the auger main body 241 when viewed in the axial direction of the rotation axis C1 (see FIG. 7). In other words, the 16 sweeping fingers 240 are located at first to fourth phase positions spaced at 90° intervals around the circumferential direction of the auger main body 241 (the circumferential direction centered on the rotation axis C1).

[0097] In the example shown in FIGS. 8 and 9, in a left side view of the sweeping 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 clockwise order around the circumferential direction of the auger body 241 at a first phase position P1. The fourth finger 240d, the eighth finger 240h, the twelfth finger 240l, and the fifteenth finger 240o are located at a second phase position P2. The seventh finger 240g, the eleventh finger 240k, and the fourteenth finger 240n are located at a third phase position P3. The second finger 240b, the fifth finger 240e, the ninth finger 240i, and the thirteenth finger 240m are located at a fourth phase position P4.

[0098] Furthermore, the sweeping auger 37 is provided with a plurality of openings 285 used for assembling and maintaining the internal structure of the auger main body 241. The openings 285 have a structure in which holes 243a formed in the peripheral wall 243 are covered with lids 286. The lids 286 are curved to fit the curved shape of the peripheral wall 243, and are detachably attached to the peripheral wall 243 with bolts or the like. The openings 285 are provided at a plurality of locations (for example, seven locations) at appropriate intervals in the auger main body 241 so as not to interfere with the blades 242.

[0099] With the raking auger 37 having the above-described configuration, the raking fingers 240 can rake in the harvested stalks sent into the platform 31, and within the platform 31, the blades 242 can feed the stalks toward the inlet 205, while the raking fingers 240 can also feed the stalks toward the inlet 205. Here, at the front of the raking auger 37, the raking fingers 240 that protrude relatively far from the peripheral wall 243 rake in the stalks, and at the rear of the raking auger 37, the raking fingers 240 protrude less from the peripheral wall 243, preventing interference between the raking fingers 240 and other components.

[0100] The arrangement of the raking fingers 240 in the raking auger 37 having the above-described configuration will be described with reference to FIG.

[0101] 9, of the plurality of sweeping fingers 240, the plurality of sweeping fingers 240 located in front of the feeder 30 are arranged at a common position in the circumferential direction (hereinafter referred to as the "auger circumferential direction") of the outer peripheral surface 241a of the auger main body 241 as sweeping finger rows, and include a first finger row 301 consisting of a first number of sweeping fingers 240 and a second finger row 302 consisting of a second number of sweeping fingers 240 that is less than the first number. In this embodiment, with regard to the first finger row 301 and the second finger row 302, the first number is four (numbers), and the second number is three (numbers), which is one less than the first number.

[0102] The raking auger 37 has two finger rows as a 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. The raking auger 37 also has two finger rows as a 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.

[0103] The first finger row 301 and the second finger row 302 are arranged alternately in the circumferential direction of the auger. That is, the first finger row 301 and the second finger row 302 are arranged alternately at first to fourth phase positions P1 to P4 spaced at 90° intervals in the circumferential direction 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.

[0104] In the first finger row 301 and the second finger row 302, the rake fingers 240 are arranged so that the spacing between adjacent rake fingers 240 in the auger axial direction is constant or approximately constant. That is, in each of the finger rows of the first finger row 301 and the second finger row 302, the rake fingers 240 are arranged at constant or approximately constant spacing in the left-right direction.

[0105] In this embodiment, the first finger row 301 and the second finger row 302 have a common predetermined dimension ΔK1 as the distance between adjacent rake fingers 240 in the auger axial direction (hereinafter referred to as "finger distance"). The finger distance is the distance between the centers of adjacent rake fingers 240 in the auger axial direction. By way of example only, the dimension ΔK1 is approximately 150 mm.

[0106] 9, the 14 sweeping fingers 240 constituting the first finger row 301 and the second finger row 302 are arranged in a range in the auger axial direction that includes the right end position Ea and the left end position Eb of the opening range E1 of the inlet 205 of the feeder 30. In describing the arrangement of the sweeping fingers 240 within the opening range E1, one graduation is defined as a dimension ΔK0 obtained by dividing the opening range E1 into 15 equal parts in the auger axial direction.

[0107] The finger spacing dimension ΔK1 common to the first finger row 301 and the second finger row 302 is a dimension corresponding to four graduations. In the auger axial direction, the first finger row 301A at the second phase position P2 has the leftmost fifteenth finger 240o positioned at the left end position Eb of the opening range E1, and the first finger row 301B at the fourth phase position P4 has the rightmost second finger 240b positioned at the right end position Ea of the opening range E1. In addition, in the auger axial direction, the second finger row 302A at the first phase position P1 positions the rightmost third finger 240c one graduation to the left of the right end position Ea of the opening range E1, and the second finger row 302B at the third phase position P3 positions the leftmost fourteenth finger 240n one graduation to the right of the left end position Eb of the opening range E1.

[0108] With this arrangement, the 14 sweeping fingers 240 within the opening range E1 are arranged at different positions in the auger axial direction. That is, the 14 sweeping fingers 240 are arranged in the order of the second to fifteenth fingers 240b to 240o from right to left in the auger axial direction, and these sweeping fingers 240 are arranged at different positions in the auger axial direction. Specifically, one sweeping finger 240 is arranged at each of the 14 scale marks from the right end position Ea to the left end position Eb in the auger axial direction, excluding the third scale mark Ma from the right and the third scale mark Mb from the left.

[0109] Furthermore, the sweeping auger 37 has the following configuration regarding the arrangement of the sweeping fingers 240 in relation to the blade portions 242. That is, the blade portions 242 are arranged so that the distance between the terminal end of the blade portions 242 in the feed direction and the sweeping finger 240 arranged closest to that terminal end is the same or approximately the same as the finger distance.

[0110] 9, the feed direction terminal ends 242a, 242b of the right and left blade portions 242R, 242L are both located within the opening range E1 of the inlet 205. Here, the terminal end 242a of the right blade portion 242R is the left end of the right blade portion 242R, and the terminal end 242b of the left blade portion 242L is the right end of the left blade portion 242L.

[0111] 9, the terminal end 242a of the right blade 242R is located between the third phase position P3 and the fourth phase position P4 in the circumferential direction of the auger and is located at the fourth scale marking from the right in the axial direction of the auger. The terminal end 242b of the left blade 242L is located between the first phase position P1 and the second phase position P2 in the circumferential direction of the auger and is located between the third and fourth scale marks from the left in the axial direction of the auger.

[0112] The right wing 242R is provided so that the dimension of the gap Ga between its terminal end 242a and the fifth finger 240e, which is the sweep finger 240 closest to the terminal end 242a, is approximately the same as the dimension ΔK1 of the finger spacing. The left wing 242L is provided so that the dimension of the gap Gb between its terminal end 242b and the tenth finger 240j, which is the sweep finger 240 closest to the terminal end 242b, is approximately the same as the dimension ΔK1 of the finger spacing.

[0113] Also, as shown in Figure 10, in the expanded view of the raking auger 37, of the multiple raking fingers 240 arranged within the opening range E1, at least one raking finger 240 is arranged near the extension line R1 of the end portion of the blade portion 242 in the feed direction, that is, approximately on the extension line R1 (approximately on the line of the extension line R1).

[0114] 10, an extension line R1 of the end portion of the blade 242 in the feed direction is a straight line extending from the end portions 242a, 242b of the straight lines representing the left and right blades 242R, 242L in the developed view of the rake auger 37. For the right blade 242R, the rake finger 240 located approximately on the extension line R1 is the fifth finger 240e included in the first finger row 301B (see FIG. 9). For the left blade 242L, the rake finger 240 located approximately on the extension line R1 is the twelfth finger 240l included in the first finger row 301A (see FIG. 9). Here, the state in which the sweeping finger 240 is positioned approximately on the extension line R1 is a state in which the sweeping finger 240 is positioned such that at least a portion of it is within a predetermined angle range (for example, within a range of ±5°) centered on the terminal ends 242a, 242b of each blade portion 242R, 242L with respect to the extension direction of the extension line R1.

[0115] For each blade 242R, 242L, the fifth finger 240e and the twelfth finger 240l, which are located approximately on the extension line R1, are disposed on the opposite side of the extension line R1 from the direction of feeding of each blade 242R, 242L in the auger axial direction. That is, the fifth finger 240e, which is located approximately on the extension line R1 of the right blade 242R, is disposed on the right side of the extension line R1, opposite the left side, which is the direction of feeding of the right blade 242R. Similarly, the twelfth finger 240l, which is located approximately on the extension line R1 of the left blade 242L, is disposed on the left side, opposite the right side, which is the direction of feeding of the left blade 242L, from the extension line R1.

[0116] 10, the plurality of sweeping fingers 240 located in front of the feeder 30 are arranged along first straight lines La1-La4 and second straight lines Lb1-Lb3 that are inclined in the same direction as the blades 242 that are inclined along straight lines in the circumferential direction of the auger (the up-down direction in FIG. 10) in the developed view of the sweeping auger 37. In FIG. 10, the first straight lines La1-La4 are indicated by dashed lines, and the second straight lines Lb1-Lb3 are indicated by dashed lines. The first straight lines La1-La4 and the second straight lines Lb1-Lb3 are all spiral lines in the cylindrical auger main body 241.

[0117] In the example shown in Figure 10, the second finger 240b, the third finger 240c, and the fourth finger 240d are arranged along the first straight line La1 located on the far right. 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. 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. The eleventh finger 240k, the thirteenth finger 240m, and the fifteenth finger 240o are arranged along the first straight line La4 located on the far left.

[0118] The third finger 240c, the fifth finger 240e, and the seventh finger 240g are arranged along a 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 a second straight line Lb2 located second from the right. The eighth finger 240h, the tenth finger 240j, the thirteenth finger 240m, and the fourteenth finger 240n are arranged along a second straight line Lb3 located on the left side.

[0119] 10, the sweeping fingers 240 arranged along the first straight lines La1 to La4 and the second straight lines Lb1 to Lb3 are arranged so as to be positioned on each straight line, i.e., so as to overlap each straight line. Here, the arrangement of the sweeping fingers 240 with respect to each straight line is not limited to an arrangement in which the center position of the sweeping fingers 240 is positioned on each straight line (the center position may be shifted from the straight line).

[0120] The second straight lines Lb1 to Lb3 are parallel or substantially parallel to the line representing the left blade 242L in the developed view of the raking auger 37. That is, the inclination angles of the second straight lines Lb1 to Lb3 are the same or substantially the same as the inclination angle of the left blade 242L. Here, the inclination angle is the angle formed with respect to the circumferential direction of the raking auger 37 in the developed view.

[0121] In this embodiment, the inclination angle θ1 of the left wing portion 242L is approximately 25°, and the inclination angles of the second straight lines Lb1-Lb3 are approximately 20°. The inclination angles of the second straight lines Lb1-Lb3 are set, for example, within a range of the inclination angle θ1±10°, more preferably within a range of the inclination angle θ1±5°, relative to the inclination angle θ1 of the left wing portion 242L. The inclination angle of the first straight lines La1-Lb4 is approximately 13°.

[0122] The first straight lines La1-La4 and the second straight lines Lb1-Lb3 form a substantially diamond lattice pattern. The plurality of sweeping fingers 240 provided in the opening range E1 of the inlet 205 are arranged at positions corresponding to the intersections of the substantially diamond lattice pattern (staggered arrangement). In this way, of the plurality of sweeping fingers 240 that the sweeping auger 37 has, the plurality of sweeping fingers 240 located in front of the feeder 30, i.e., the plurality of sweeping fingers 240 provided in the opening range E1, are arranged in a staggered arrangement.

[0123] According to the combine harvester 1 of this embodiment having the above-mentioned configuration, in a configuration equipped with a raking auger 37 for raking harvested crops into the feeder 30, the crop intake performance of the raking auger 37 can be improved.

[0124] The raking auger 37 has a plurality of raking fingers 240 provided in the opening range E1 of the inlet 205, and includes a first finger row 301 and a second finger row 302 that are alternately arranged around the auger and have constant finger spacing. This configuration makes it possible to efficiently add more raking fingers 240, allowing the raking fingers 240 to strike the stalks evenly while efficiently raking them in, thereby improving poor stalk incorporation. In other words, even in harvesting wheat, where the volume of stalks is relatively large, the raking fingers 240 can sufficiently change the position of the stalks, thereby improving the stalk incorporation by the raking auger 37.

[0125] The right and left blades 242R and 242L are also configured so that the distance between their respective terminal ends 242a, 242b and the closest sweeping finger 240 is approximately the same as the distance between the fingers. This configuration reduces clogging caused by unexpected clumps of stalks and ensures good collection while delivering stable impacts to the stalks.

[0126] The plurality of raking fingers 240 provided in the opening range E1 are arranged in a staggered pattern. With this configuration, the stalks that pass between the raking fingers 240 on the rotating raking auger 37 can be struck by the next raking finger 240 (the raking finger 240 that arrives next as the raking auger 37 rotates), allowing the raking fingers 240 to act efficiently on the stalks and improving intake performance.

[0127] In particular, in this embodiment, the multiple (14) raking fingers 240 provided in the opening range E1 are all arranged at different positions in the auger axial direction. This configuration allows the raking fingers 240 to act evenly on the stalks, effectively improving the intake performance.

[0128] Furthermore, in the development view of the raking auger 37, the multiple raking fingers 240 are arranged along second straight lines Lb1 to Lb3 that are parallel or approximately parallel to the extension direction of the left blade portion 242L. In addition to the original raking action of the raking fingers 240, the multiple raking fingers 240 can also send the stumps to the center of the feeder house 35. This improves the stump transport performance of the raking auger 37, making it less likely that the harvested stumps will become entangled with the raking fingers 240 in front of the intake 205 of the feeder 30, preventing the stumps from stagnating or clogging, and allowing the stumps to be smoothly handed over to the feeder 30.

[0129] In this embodiment, the number of the raking fingers 240 constituting the first finger row 301 is four, and the number of the raking fingers 240 constituting the second finger row 302 is three. With this configuration, for example, in a configuration in which the dimension of the opening range E1 of the inlet 205 is about 550 mm, the number of the raking fingers 240 can be efficiently increased, thereby effectively improving the intake performance while suppressing clogging of the straw.

[0130] The raking auger 37 also has raking fingers 240 (fifth finger 240e, twelfth finger 240l) positioned approximately on the extension line R1 of the end of the blade portion 242 in the feed direction. This configuration makes it easier for the raking fingers 240 to catch on stalks that have fallen due to a change in posture. This allows the stalks to be transported efficiently and improves the stalk intake performance.

[0131] Furthermore, the sweeping finger 240, which is positioned approximately on the extension line R1, is positioned on the opposite side of the extension line R1 in the left-right direction from the side of the feeding action direction of the blade portion 242. With this configuration, good transportability of the stalks can be achieved without interfering with the transport of the stalks near the end of the blade portion 242 in the feeding direction, and the ability to take in the stalks can be effectively improved.

[0132] As described above, the raking auger 37 of this embodiment has improved straw intake performance by adding raking fingers 240 and arranging the pitch of the raking fingers 240 in the axial direction of the auger and the arrangement of the raking fingers 240 around the periphery of the auger with regularity in relation to the blade portions 242.

[0133] [Second embodiment] A second embodiment of the present invention will be described with reference to Figures 11 and 12. In the second embodiment of the present invention described below, the same names or symbols are used for components that are common to or correspond to those of the first embodiment, and descriptions of overlapping content will be omitted as appropriate. The combine harvester according to this embodiment differs from the first embodiment in the arrangement and configuration of the raking fingers 240 and the configuration of the blades 242 of the raking auger 37.

[0134] As shown in Fig. 11, in this embodiment, ten sweeping fingers 240, numbered 2 to 11, 240B to 240K, are provided in order from right to left as sweeping fingers 240 provided in opening range E1 of inlet 205 of feeder 30. These ten sweeping fingers 240 are supported by second finger support shaft 250B (see Fig. 8) and are positioned at one of first to fourth phase positions in the circumferential direction of the auger. Note that Fig. 11 shows a state in which a developed view of a 360° angular range of auger main body 241 is connected vertically in the circumferential direction of the auger corresponding to the vertical direction in the figure, from the viewpoint of showing the continuity of blade portions 242.

[0135] 11, the second finger 240B, the fourth finger 240D, and the seventh finger 240H are located at the first phase position P1. The third finger 240C and the sixth finger 240F are located at the second phase position P2. The fifth finger 240E, the ninth finger 240I, and the eleventh finger 240K are located at the third phase position P3. The seventh finger 240G and the tenth finger 240J are located at the fourth phase position P4.

[0136] 11, of the plurality of sweep fingers 240, the plurality of sweep fingers 240 located in front of the feeder 30 includes a sweep finger row including a first finger row 401 consisting of a first number of sweep fingers 240 and a second finger row 402 consisting of a second number of sweep fingers 240 that is less than the first number. In this embodiment, with regard to the first finger row 401 and the second finger row 402, the first number is 3 (numbers), and the second number is 2 (numbers), which is 1 less than the first number.

[0137] The raking auger 37 has two finger rows as a 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. The raking auger 37 also has two finger rows as a 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.

[0138] The first finger row 401 and the second finger row 402 are arranged alternately in the circumferential direction 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.

[0139] The first finger row 401 and the second finger row 402 have the sweep fingers 240 arranged so that the finger spacing is constant or approximately constant. In this embodiment, the first finger row 401 and the second finger row 402 have the same predetermined finger spacing dimension ΔK1.

[0140] Specifically, as shown in FIG. 11, the ten sweeping fingers 240 constituting the first finger row 401 and the second finger row 402 are arranged within the opening range E1 of the inlet 205 of the feeder 30 in the auger axial direction.

[0141] The finger spacing dimension ΔK1 common to the first finger row 401 and the second finger row 402 is a dimension corresponding to four graduations. In the auger axial direction, the first finger row 401A at the first phase position P1 has the rightmost second finger 240B positioned one graduation to the left of the right end position Ea of the opening range E1, and the first finger row 401B at the third phase position P3 has the leftmost eleventh finger 240K positioned one graduation to the right of the left end position Eb of the opening range E1. In addition, in the auger axial direction, the second finger row 402A at the second phase position P2 positions the third finger 240C on the right side three graduations to the left of the right end position Ea of the opening range E1, and the second finger row 402B at the fourth phase position P4 positions the tenth finger 240J on the left side three graduations to the right of the left end position Eb of the opening range E1.

[0142] With this arrangement, the ten sweeping fingers 240 within the opening range E1 are arranged at different positions in the auger axial direction. That is, the ten sweeping fingers 240 are arranged in the order of the second to eleventh fingers 240B to 240K from right to left in the auger axial direction, and these sweeping fingers 240 are arranged at different positions in the auger axial direction. Specifically, one sweeping finger 240 is arranged at each of the ten scale marks from the right end position Ea to the left end position Eb in the auger axial direction, excluding the right end position Ea, the left end position Eb, the third and fifth scale marks Mc and Md from the right, and the third and fifth scale marks Me and Mf from the left.

[0143] 11, in this embodiment, the blade portion 242 includes a plurality of blade components 450 that have different inclination angles relative to the circumferential direction of the auger. Here, the inclination angle relative to the circumferential direction of the auger is the angle (hereinafter simply referred to as the "inclination angle") that the blade portion 242 forms with the circumferential direction of the auger (the up-down direction in FIG. 11) in the developed view of the scraping auger 37.

[0144] The blade portion 242 includes, as the blade constituent part 450, a terminal blade constituent part 452 that forms the part on the terminal side in the feed direction of the blade portion 242. In other words, the blade portion 242 has a main blade constituent part 451 that forms almost the entire blade portion 242, and the terminal blade constituent part 452 that is provided on the terminal side of the blade portion 242.

[0145] The main blade component 451 and the terminal blade component 452 are continuous portions that form the integral blade portion 242. The main blade component 451 and the terminal blade component 452 have different inclination angles. The inclination angle α1 of the main blade component 451 and the inclination angle α2 of the terminal blade component 452 are both acute angles. Therefore, the main blade component 451 and the terminal blade component 452 form an obtuse angle in the development view of the raking auger 37.

[0146] The terminal blade component 452 is a portion having a larger inclination angle than the main blade component 451, which is the other blade component 450. That is, the inclination angle α2 of the terminal blade component 452 is larger than the inclination angle α1 of the main blade component 451. In this embodiment, the inclination angle α1 of the main blade component 451 is approximately 27°, and the inclination angle α2 of the terminal blade component 452 is approximately 60°. However, the magnitude of each inclination angle is not particularly limited.

[0147] In a configuration in which the blade portion 242 includes a right blade portion 242R and a left blade portion 242L, the left and right blade portions 242R, 242L have a main blade component 451 and a terminal blade component 452 that are symmetrical in the auger axial direction. That is, in each blade portion 242, the terminal blade component 452 is provided as a portion bent toward the feed direction side relative to the main blade component 451.

[0148] Therefore, in the right blade portion 242R, the terminal blade component 452 is a portion bent to the left relative to the main blade component 451, and in the left blade portion 242L, the terminal blade component 452 is a portion bent to the right relative to the main blade component 451. In the right blade portion 242R, the tip end of the terminal blade component 452 becomes the terminal end 242a of the right blade portion 242R, and in the left blade portion 242L, the terminal end of the terminal blade component 452 becomes the terminal end 242b of the left blade portion 242L.

[0149] In this embodiment, the inclination angle α1 of the main blade component 451 and the inclination angle α2 of the terminal blade component 452 are the same for the left and right blade portions 242R, 242L, respectively. However, the magnitude of these inclination angles may be different for the left and right blade portions 242R, 242L. Also, in this embodiment, the terminal blade component 452 is provided as a bent portion relative to the main blade component 451, but the terminal blade component 452 may be provided so as to form a curved corner together with the main blade component 451.

[0150] The right blade 242R and the left blade 242L are arranged with their phases different from each other in the circumferential direction of the auger. In the configuration in which the right blade 242R and the left blade 242L have the same inclination angles α1 and α2 as described above, the terminal end 242a of the right blade 242R is located between the third phase position P3 and the fourth phase position P4 in the circumferential direction of the auger. Furthermore, the terminal end 242b of the left blade 242L is located between the first phase position P1 and the second phase position P2 in the circumferential direction of the auger.

[0151] In this embodiment, the right blade 242R and the left blade 242L are arranged so that their phases in the circumferential direction of the auger are different by 180°. Therefore, the angular range Q1 in the circumferential direction of the auger between the terminal ends 242a, 242b of the left and right blades 242R, 242L is 180°. The left and right blades 242R, 242L are arranged so that the distance ΔK2 between the terminal ends 242a, 242b in the axial direction of the auger is three graduations.

[0152] In the configuration in which the left and right blade portions 242 have terminal blade components 452 as described above, at least one of the multiple sweeping fingers 240 arranged within the opening range E1 is arranged on the extension line N1 of the terminal portion of the blade portion 242 in the feed direction.

[0153] 11, an extension line N1 of the end portions of the blades 242 in the feed direction is a straight line extending from the end portions 242a, 242b of the straight lines representing the end blade components 452 of the left and right blades 242R, 242L in the developed view of the rake auger 37. For the right blade 242R, the rake finger 240 located on the extension line N1 is the seventh finger 240G included in the second finger row 402B. For the left blade 242L, the rake finger 240 located on the extension line N1 is the sixth finger 240F included in the second finger row 402A.

[0154] The sweeping fingers 240 located on the extension line N1 of the left and right blades 242R, 242L are the sweeping fingers 240 closest to the terminal ends 242a, 242b. The right blade 242R has a distance Gc between its terminal end 242a and the seventh finger 240G located on the extension line N1 that is two to three graduations, which is smaller than the finger spacing ΔK1. Similarly, the left blade 242L has a distance Gd between its terminal end 242b and the sixth finger 240F located on the extension line N1 that is two to three graduations, which is smaller than the finger spacing ΔK1.

[0155] 12, the plurality of sweeping fingers 240 located in front of the feeder 30 are arranged along first straight lines Lc1, La2 and second straight lines Ld1, Ld2 that are inclined in the same direction as the blades 242 in the developed view of the sweeping auger 37. In FIG. 12, the first straight lines Lc1, Lc2 are indicated by dashed lines, and the second straight lines Ld1, Ld2 are indicated by dashed lines. The first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 are all spiral lines in the cylindrical auger body 241.

[0156] 11, 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 located on the right side, and 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 located on the left side.

[0157] The third finger 240C, the fourth finger 240D, the seventh finger 240G, and the ninth finger 240I are arranged along a second straight line Ld1 located 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 a second straight line Ld2 located on the left side.

[0158] 12, the sweeping fingers 240 arranged along the first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 are arranged so as to be positioned on each straight line, i.e., so as to overlap each straight line. Here, the arrangement of the sweeping fingers 240 with respect to each straight line is not limited to an arrangement in which the center position of the sweeping fingers 240 is positioned on the straight line (the center position may be shifted from the straight line).

[0159] The first straight lines Lc1 and Lc2 are parallel or substantially parallel to the straight line representing the main blade component 451 of the right blade portion 242R in the developed view of the scooping auger 37. In other words, 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 component 451 of the right blade portion 242R. Similarly, the second straight lines Ld1 and Ld2 are parallel or substantially parallel to the straight line representing the main blade component 451 of the left blade portion 242L in the developed view of the scooping auger 37.

[0160] In this embodiment, the inclination angle α1 of the main body blade component 451 of each of the left and right blade portions 242R, 242L is approximately 27°, while the inclination angle of each of the first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 is approximately 21°. The inclination angles of each of the first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 are set, for example, within a range of inclination angle α1±10°, more preferably within a range of inclination angle α1±5°, with respect to inclination angle α1.

[0161] According to the scraping auger 37 of this embodiment having the above-mentioned configuration, similar to the first embodiment, in a configuration having a scraping auger 37 for scraping harvested crops into the feeder 30, the crop intake performance of the scraping auger 37 can be improved.

[0162] The blade portion 242 according to this embodiment includes a plurality of blade components 450 with different inclination angles. This configuration can sufficiently change the posture of the stalks transported to the inside of the platform 31 by the raking auger 37. This improves the ability of the raking auger 37 to take in the stalks, thereby achieving good take-in performance even in, for example, harvesting wheat, which produces a relatively large volume of stalks.

[0163] Furthermore, the blade section 242 has a main blade component 451 and a terminal blade component 452 as multiple blade components 450, and the inclination angle of the terminal component is made different from that of the other components. This configuration can effectively change the posture of the stalks transported to the inside of the left and right sides by the raking auger 37, thereby improving the ability of the raking auger 37 to take in the stalks.

[0164] Furthermore, in the blade section 242, the terminal blade component 452 is provided as a portion with a larger inclination angle than the main blade component 451. With this configuration, the stalks transported to the left and right inner sides by the raking auger 37 can be more effectively changed in position.

[0165] The raking auger 37 has a right blade 242R and a left blade 242L as the blades 242. With this configuration, the straw can be collected from both the left and right sides of the platform 31 toward the inlet 205 of the feeder 30, thereby achieving good transportability of the straw to the feeder 30.

[0166] In addition, the right blade 242R and the left blade 242L are arranged so that their phases in the circumferential direction of the auger are different from each other. In this embodiment, the left and right blades 242R, 242L are arranged so that their phases are different from each other by 180°. With this configuration, in a configuration in which the feeding action of the left and right blades 242R, 242L collects the straw at a position in front of the intake opening 205, the amount of straw collected from both the left and right sides during one rotation of the raking auger 37 and transported to the feeder 30 can be made uniform, thereby preventing the straw from concentrating in one area and allowing the straw to be transported efficiently.

[0167] Furthermore, in the raking auger 37, the raking finger 240 is disposed on the extension line N1 on the terminal side of the left and right blade portions 242R, 242L. With this configuration, the terminal blade component 452 can change the posture of the stalks, and the raking finger 240 can easily catch on stalks that have fallen due to the change in posture. This allows the stalks to be transported efficiently, effectively improving the stalk intake ability.

[0168] In particular, in this embodiment, the sweeping fingers 240 located on the extension line N1 are sweeping fingers 240 that form the second finger row 402, which has a smaller number of fingers than the first finger row 401. With this configuration, it is easier to ensure the spacing between the sweeping fingers 240 and the blade portion 242 near the end of one of the blade portions 242 where the spacing between the left and right blade portions 242R, 242L becomes relatively narrow, so it is possible to improve the intake performance of the grain stalk while suppressing clogging of the grain stalk.

[0169] In this embodiment, the number of sweeping fingers 240 making up the first finger row 401 is three, and the number of sweeping fingers 240 making up the second finger row 402 is two. With this configuration, for example, in a configuration in which the dimension of the opening range E1 of the inlet 205 is about 550 mm, the blade section 242 is provided with a terminal blade component 452, and the sweeping fingers 240 can be efficiently added, so that the intake performance can be effectively improved while suppressing clogging of the straw.

[0170] Furthermore, in this embodiment, the configuration including the first finger row 401 and the second finger row 402 arranged alternately around the circumferential direction of the auger with constant finger spacing, and the configuration in which multiple raking fingers 240 are arranged along the first straight lines Lc1, Lc2 and the second straight lines Ld1, Ld2 that are parallel or approximately parallel to the extension direction of the blade portion 242 in the expanded view of the raking auger 37, can provide the same effects as those of the first embodiment.

[0171] The combine harvester according to the present invention described above using the embodiments is not limited to the above-described embodiments, and various aspects can be adopted within the scope of the spirit of the present invention.

[0172] The present technology can be configured as follows: The configurations described below can be selected and combined as desired.

[0173] (1) A combine harvester comprising: a supply and conveying device provided in front of the threshing section; and a raking auger provided in front of the supply and conveying device for raking crops into the supply and conveying device, The raking auger has a cylindrical auger body with a rotation axis extending in the left-right direction of the machine body, a spiral blade portion provided on the outer peripheral surface of the auger body and providing a feeding action to the crops in the rotation axis direction, and a plurality of raking fingers protruding from the outer peripheral surface, Among the plurality of sweeping fingers, the plurality of sweeping fingers located in front of the supply and conveying device are arranged at common positions in the circumferential direction of the outer circumferential surface, and include a first finger row consisting of a first number of the sweeping fingers and a second finger row consisting of a second number of the sweeping fingers that is less than the first number, The first finger row and the second finger row are arranged alternately in the circumferential direction, and the intervals between the rake fingers adjacent to each other in the direction of the rotation axis are constant or approximately constant. A combine harvester characterized by: (2) The blade portion is provided so that the distance between the end of the blade portion in the feeding direction and the sweeping finger disposed closest to the end is the same or substantially the same as the distance between the sweeping fingers. The combine harvester according to (1) above. (3) Among the plurality of pick-up fingers, the plurality of pick-up fingers located in front of the supply and conveyance device are arranged in a staggered arrangement. The combine harvester according to (1) or (2) above, characterized in that: (4) The first number is 4 and the second number is 3 The combine harvester according to any one of (1) to (3) above, (5) The blade portion includes a plurality of blade components that are inclined at different angles relative to the circumferential direction. The combine harvester according to (1) above. (6) The blade portion includes, as the blade constituent portion, a terminal blade constituent portion that forms a portion on the terminal side of the blade portion in the feed direction. The combine harvester according to (5) above. (7) The terminal blade component is a portion in which the inclination angle is larger than that of the other blade components. The combine harvester according to (6) above. (8) The raking auger has, as the blade portion, a right blade portion provided on the right side of the auger body portion and having the feeding action direction in a left direction, and a left blade portion provided on the left side of the auger body portion and having the feeding action direction in a right direction. The combine harvester according to any one of (5) to (7) above, characterized in that (9) The right wing portion and the left wing portion are disposed out of phase with each other in the circumferential direction. The combine harvester according to (8) above. (10) At least one of the plurality of raking fingers is disposed on an extension line of the terminal end of the blade portion in the feeding direction. The combine harvester according to any one of (5) to (9) above, (11) The first number is 3 and the second number is 2 The combine harvester according to any one of (5) to (10) above, [Explanation of symbols]

[0174] 1. Combine 7. Threshing Department 30 Feeder (supply and conveying device) 37 Raking Auger 240 Sweeping Finger 241 Auger body 241a Outer surface 242 Wing 242a Termination 242b Termination 242R Right wing part 242L Left wing 301 First finger row 302 Second finger row 401 First finger row 402 Second finger row 450 Blade components 451 Main body blade component (blade component) 452 Terminal blade component (blade component) N1 extension line

Claims

1. A combine harvester comprising: a supply and conveying device provided in front of the threshing section; and a raking auger provided in front of the supply and conveying device for raking crops into the supply and conveying device, The raking auger has a cylindrical auger body with a rotation axis extending in the left-right direction of the machine body, a spiral blade portion provided on the outer peripheral surface of the auger body and providing a feeding action to the crops in the rotation axis direction, and a plurality of raking fingers protruding from the outer peripheral surface, Among the plurality of sweeping fingers, the plurality of sweeping fingers located in front of the supply and conveying device are arranged at common positions in the circumferential direction of the outer circumferential surface, and include a first finger row consisting of a first number of the sweeping fingers and a second finger row consisting of a second number of the sweeping fingers that is less than the first number, The first finger row and the second finger row are arranged alternately in the circumferential direction, and the intervals between the rake fingers adjacent to each other in the direction of the rotation axis are constant or approximately constant. A combine harvester characterized by:

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

3. Among the plurality of pick-up fingers, the plurality of pick-up fingers located in front of the supply and conveyance device are arranged in a staggered arrangement. The combine harvester according to claim 1 or 2.

4. The first number is four and the second number is three. The combine harvester according to claim 1 .

5. The blade portion includes a plurality of blade components that are inclined at different angles relative to the circumferential direction. The combine harvester according to claim 1 .

6. The blade portion includes, as the blade constituent portion, a terminal blade constituent portion that forms a portion on the terminal side of the blade portion in the feed direction. The combine harvester according to claim 5 .

7. The terminal blade component is a portion in which the inclination angle is larger than that of the other blade components. The combine harvester according to claim 6 .

8. The raking auger has, as the blade portion, a right blade portion provided on the right side of the auger body portion and having the feeding action direction in a left direction, and a left blade portion provided on the left side of the auger body portion and having the feeding action direction in a right direction. The combine harvester according to any one of claims 5 to 7.

9. The right wing portion and the left wing portion are disposed out of phase with each other in the circumferential direction. The combine harvester according to claim 8 .

10. At least one of the plurality of raking fingers is disposed on an extension line of the terminal end of the blade portion in the feeding direction. The combine harvester according to claim 5 .

11. The first number is 3 and the second number is 2. The combine harvester according to claim 5 .

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