Combine harvester

Abstract

The invention provides a combine harvester capable of suppressing wear of a support portion of a slat of a conveyor constituting a conveying device and improving durability of the conveyor. The combine harvester is provided with a feeding part (30) which conveys ear stalks cut by a cutting part and supplies the ear stalks to a threshing part. The feeding part (30) is provided with a front roller (130) which is arranged on the front side of the feeding part (30) in the conveying direction; a sprocket that rotates integrally with a drive shaft provided on the rear side in the conveyance direction; left and right chains (110) wound around the front drum (130) and the sprockets; a plurality of slats (120) erected between the left and right chains (110); and a slat support section (150) that supports the slat (120) on the front drum (130). The slat support section (150) has: a cylindrical section (151) that constitutes a contact surface that comes into contact with the slat support section (150); and an annular portion (152) that supports the cylindrical portion (151) on the front drum (130).

Description

TECHNICAL FIELD

[0001] The present application relates to a combine harvester provided with a conveying device that conveys ear stalks cut by a cutting section and supplies the ear stalks to a threshing section. BACKGROUND

[0002] In the past, there has been a combine harvester provided with a feeding section that is a conveying device that conveys ear stalks cut by a cutting section and supplies the ear stalks to a threshing section. The feeding section is provided with a structure in which an ear stalk conveying conveyor is provided inside a feeding chamber that is a housing. The conveyor has a cutting section input shaft that is a drive shaft of the conveyor that is axially supported at the end of the conveying side, with the left and right directions of the body as the axial directions.

[0003] The conveyor in the feeding chamber is configured as a slat conveyor that has a chain provided inside the feeding chamber in parallel with each other at both left and right sides, and slats that are a plurality of conveying pieces, which are erected between the left and right chains. The conveyor is configured such that the chain is wound in a ring shape on a sprocket that is supported at the cutting section input shaft and a cylindrical rotating body provided at the front end portion inside the feeding chamber, and is driven in a manner that moves the plurality of slats while maintaining the wound state, by rotation of the sprocket in conjunction with rotation of the cutting section input shaft (for example, refer to Patent Document 1).

[0004] With regard to the relationship of the slats with the rotating body with which the portion of the front side of the left and right chains is wound, the both end portions of the slats in the lengthwise direction are supported on the rotating body by the chain, and a gap is provided between the slats and the outer peripheral surface of the rotating body. Therefore, as disclosed in the drawings in Patent Document 1, a plate-shaped support portion that supports the middle portion of the slats in the lengthwise direction from the inner peripheral side of the wound form of the chain is provided protruding from the outer peripheral surface of the rotating body.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT DOCUMENTS

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 9-271245 SUMMARY

[0008] According to the support portion provided at the outer peripheral surface of the rotating body, the middle portion of the slats in the lengthwise direction is contact supported by the support portion, so that an effect of suppressing the deflection of the slats by external force from the ear stalks and the like can be obtained. However, according to the conventional support portion disclosed in Patent Document 1, wear is easily generated at the contact portion of the support portion and the slats, so that there is room for improvement in terms of durability.

[0009] The present application was completed in view of the above problems, and aims to provide a combine harvester that can suppress wear of the support portion of the slats of the conveyor that constitutes the conveying device, and can improve the durability of the conveyor.

[0010] The combine harvester according to the present application is provided with a conveying device that conveys and feeds a stalk to a threshing section, the conveying device having: a rotating body provided on a front side in a conveying direction of the conveying device; a sprocket that rotates integrally with a drive shaft provided on a rear side in the conveying direction; left and right chains that are wound around the rotating body and the sprocket; a plurality of slats that are erected between the left and right chains; and a slat support portion that supports the slats to the rotating body, the slat support portion having: a contact portion that constitutes a contact surface that contacts the slats; and a support base portion that supports the contact portion to the rotating body.

[0011] The other aspect of the combine harvester according to the present application is provided on the basis of the combine harvester, the slat support portion being provided at a plurality of positions in a rotation axis direction of the rotating body.

[0012] The other aspect of the combine harvester according to the present application is provided on the basis of the combine harvester, the slat support portion having a rotating body shape that has the rotation center line of the rotating body as an axis.

[0013] The other aspect of the combine harvester according to the present application is provided on the basis of the combine harvester, the slat support portion being provided to be inclined with respect to a direction orthogonal to the rotation center line of the rotating body.

[0014] The other aspect of the combine harvester according to the present application is provided on the basis of the combine harvester, the slat support portion being provided to be inclined in a manner that applies a conveying action to the stalks toward the inside in the left-right direction of the machine body.

[0015] The other aspect of the combine harvester according to the present application is provided on the basis of the combine harvester, the slat being provided with an engagement portion that engages with the slat support portion.

[0016] The combine harvester according to the present application is provided with a conveying device that conveys and feeds a stalk to a threshing section, the conveying device having: a rotating body provided on a front side in a conveying direction of the conveying device; a sprocket that rotates integrally with a drive shaft provided on a rear side in the conveying direction; left and right chains that are wound around the rotating body and the sprocket; a plurality of slats that are erected between the left and right chains; and a slat support portion that supports the slats to the rotating body, the slat support portion being provided in a spiral shape in a manner that applies a conveying action to the stalks in an axial direction of the rotating body.

[0017] The other mode of the combine harvester according to the present application is a combine harvester in which a grain harvesting header in which a rake auger is built in is provided on the front side of a conveyance device in communication with a housing of the conveyance device, the housing is provided at a position deviated to one side in the left-right direction of the machine body with respect to the grain harvesting header, and the direction of the conveyance action is a direction toward the one side in the left-right direction.

[0018] Effects of the Invention

[0019] According to the present application, the wear of the support portion of the slat of the conveyer constituting the conveyance device can be suppressed, and the durability of the conveyer can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a left side view of the combine harvester according to the first embodiment of the present application.

[0021] Figure 2 is a right side view of the combine harvester according to the first embodiment of the present application.

[0022] Figure 3 is a plan view of the combine harvester according to the first embodiment of the present application.

[0023] Figure 4 is a diagram showing the power transmission structure of the combine harvester according to the first embodiment of the present application.

[0024] Figure 5 is a front perspective view showing the structure of the feed section according to the first embodiment of the present application.

[0025] Figure 6 is a left side sectional view showing the structure of the feed section according to the first embodiment of the present application.

[0026] Figure 7 is a plan sectional view showing the structure of the front portion of the feed section according to the first embodiment of the present application.

[0027] Figure 8 is a front perspective view showing the structure of the conveyer according to the first embodiment of the present application.

[0028] Figure 9 is a front perspective view showing the front roller and the slat support portion according to the first embodiment of the present application.

[0029] Figure 10 is a sectional view showing the structure of the slat support portion according to the first embodiment of the present application.

[0030] Figure 11FIG. 1 is a front view showing a front roller and a board strip support portion according to a first embodiment of the present application.

[0031] Figure 12 FIG. 2 is a diagram showing a modification of the configuration structure of the board strip support portion according to the first embodiment of the present application.

[0032] Figure 13 FIG. 3 is a front perspective view showing a front roller and a board strip support portion according to a second embodiment of the present application.

[0033] Figure 14 FIG. 4 is a sectional view showing the structure of the board strip support portion according to the second embodiment of the present application.

[0034] Figure 15 FIG. 5 is a perspective view showing a support portion forming member according to the second embodiment of the present application.

[0035] Figure 16 FIG. 6 is a front partial cutaway sectional view showing a front roller and a board strip support portion according to a third embodiment of the present application.

[0036] Figure 17 FIG. 7 is a front view of Figure 16 FIG. 8 is an X-X sectional view.

[0037] Figure 18 FIG. 9 is a front view showing a front roller and a board strip support portion according to a fourth embodiment of the present application.

[0038] Figure 19 FIG. 10 is a front perspective view showing a front roller and a board strip support portion according to a fifth embodiment of the present application.

[0039] Figure 20 FIG. 11 is a sectional view showing the structure of the board strip support portion according to the fifth embodiment of the present application.

[0040] Figure 21 FIG. 12 is a front view showing a front roller, a board strip, and a board strip support portion according to a sixth embodiment of the present application.

[0041] Figure 22 FIG. 13 is a partial side sectional view showing the structure of the board strip and the board strip support portion according to the sixth embodiment of the present application.

[0042] Figure 23 FIG. 14 is a front view showing a front roller and a board strip support portion according to a seventh embodiment of the present application.

[0043] Figure 24 FIG. 15 is an explanatory diagram regarding the action of the board strip support portion according to the seventh embodiment of the present application, and is a front view showing the configuration structure of a platform and a feeding portion.

[0044] Explanation of reference numerals in the attached figures

[0045] 1… combine harvester; 3… harvesting section; 7… threshing section; 30… feeding section (conveyor); 31… platform (grain harvesting platform); 35… feeding chamber (shell); 37… rake auger; 38… harvesting section input shaft (drive shaft); 110… chain; 120… slats; 113… sprocket; 130… front roller (rotating body); 150… slat support section; 151… cylindrical section (contact section); 152… annular section (support base); 600… recess (engaging section). Detailed Implementation

[0046] The present invention is configured such that multiple slats mounted between the left and right chains in the conveyor of the conveying device support the rotating body in a surface-contact manner or in a spiral shape, thereby suppressing wear on the support portion and improving durability. Embodiments of the present invention will be described below.

[0047] [First Implementation Method]

[0048] use Figures 1 to 4 The overall structure of the combine harvester 1 according to the first embodiment of the present invention will be described. Furthermore, in the following description, the left side ( ) will be viewed towards the front of the combine harvester 1. Figure 3 (lower side) and right side ( Figure 3 The upper side of the machine is set as the left and right sides of the combine harvester 1, respectively.

[0049] like Figure 1 and Figure 2 As shown, the combine harvester 1 according to this embodiment is a common type of combine harvester that harvests crops (rice, wheat, soybeans, corn, etc.) from the field and rakes them into the machine body for threshing / screening / grain storage, and can appropriately output them to the outside of the harvester. The combine harvester 1 has: a traveling body 2, which is capable of autonomous movement; and a cutting section 3, which is provided at the front end of the traveling body 2. The cutting section 3 is configured as a cutting device that cuts the uncut ears of rice, wheat, etc. and picks them up, and is mounted on the traveling body 2 in a lifting and lowering manner.

[0050] The traveling body 2 includes a traveling section 4 configured as a tracked traveling device with a pair of left and right tracks 5, 5. An organism frame 6 is provided above the left and right tracks 5, 5. Each track 5 has: multiple rotating bodies including a drive sprocket 5a provided at its front end; and a track 5c wound around the rotating body. The drive sprocket 5a is driven to rotate by receiving power from the engine 25 provided with the combine harvester 1.

[0051] A threshing section 7 that threshes the stalks cut and fed by the cutting section 3 and a screening section 8 that screens the grains after being threshed by the threshing section 7 are provided on the left side of the body frame 6. The threshing section 7 and the screening section 8 are arranged with the threshing section 7 on the upper layer and the screening section 8 on the lower layer.

[0052] A grain storage section 9 having a grain tank 10 that stores the grains (clean grains) screened by the screening section 8 is provided on the body frame 6 and on the right side of the threshing section 7 and the screening section 8. A lower discharge conveyor 11 that conveys the stored grains toward the discharge port of the grain tank 10 is provided inside the grain tank 10 (see FIG. 2). Figure 4 ) is provided. A longitudinal conveyor 12 is provided upright in the vertical direction in a manner communicating with the discharge port of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end portion of the longitudinal conveyor 12. The grain discharge conveyor 13 is arranged to be able to rotate in the horizontal direction and to be able to swing up and down about a horizontal axis. The grains inside the grain tank 10 are conveyed by the conveyors described above and discharged toward the cargo box of a truck, a container, or the like from a paddy rice discharge port 14 provided at the distal end portion of the grain discharge conveyor 13.

[0053] A driver's section 15 for an operator to ride is provided on the body frame 6 and at a position in front of the grain storage section 9, that is, at a position on the right side front portion of the body frame 6. The driver's section 15 is covered by a cab 16. A driver's seat 17, a steering wheel 18 disposed in front of the driver's seat 17, and various operation sections such as a main shift lever 19, a sub shift lever, and a work clutch lever (see FIG. 2) are provided in the driver's section 15. The work clutch lever is a work operation member for engaging and disengaging the threshing clutch 57 and the cutting clutch 75 (see FIG. 2). Figure 2 ) is provided. A longitudinal conveyor 12 is provided upright in the vertical direction in a manner communicating with the discharge port of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end portion of the longitudinal conveyor 12. The grain discharge conveyor 13 is arranged to be able to rotate in the horizontal direction and to be able to swing up and down about a horizontal axis. The grains inside the grain tank 10 are conveyed by the conveyors described above and discharged toward the cargo box of a truck, a container, or the like from a paddy rice discharge port 14 provided at the distal end portion of the grain discharge conveyor 13. Figure 4 ) is provided. A longitudinal conveyor 12 is provided upright in the vertical direction in a manner communicating with the discharge port of the grain tank 10. A grain discharge conveyor 13 is connected to the upper end portion of the longitudinal conveyor 12. The grain discharge conveyor 13 is arranged to be able to rotate in the horizontal direction and to be able to swing up and down about a horizontal axis. The grains inside the grain tank 10 are conveyed by the conveyors described above and discharged toward the cargo box of a truck, a container, or the like from a paddy rice discharge port 14 provided at the distal end portion of the grain discharge conveyor 13.

[0054] A driver's section 15 for an operator to ride is provided on the body frame 6 and at a position in front of the grain storage section 9, that is, at a position on the right side front portion of the body frame 6. The driver's section 15 is covered by a cab 16. A driver's seat 17, a steering wheel 18 disposed in front of the driver's seat 17, and various operation sections such as a main shift lever 19, a sub shift lever, and a work clutch lever (see FIG. 2) are provided in the driver's section 15. The work clutch lever is a work operation member for engaging and disengaging the threshing clutch 57 and the cutting clutch 75 (see FIG. 2).

[0055] The cutting section 3 will be described. The cutting section 3 has a feeder section 30 that is a conveying device, a platform 31 that is a grain harvesting table, a cutter device 32, a pair of left and right divider bodies 33, 33, and a rake harrow wheel 34.

[0056] The feeder section 30 is a feed conveying device that conveys the stalks cut by the cutting section 3 and feeds them to the threshing section 7. The feeder section 30 has a feeder chamber 35 that is a housing and a conveyor 36 for conveying the stalks, which is provided inside the feeder chamber 35 (see FIG. 2). Figure 4). The feed chamber 35 is configured in a substantially square cylindrical shape with the length direction as the front-rear direction in plan view. The feed section 30 is located on the left side of the cab 16 (see FIG. 1) and is disposed so that the rear end opening of the feed chamber 35 communicates with the threshing port 7a on the front side of the threshing section 7 (see FIG. 1). Figure 3 ), and is disposed so that the rear end opening of the feed chamber 35 communicates with the threshing port 7a on the front side of the threshing section 7 (see Figure 1 ).

[0057] The platform 31 is configured in a horizontally long hopper shape and is connected and disposed on the front side of the feed section 30 in a manner so as to communicate with the front end opening of the feed chamber 35. The feed chamber 35 is disposed on the left side of the center relative to the platform 31 in the left-right direction. A rake auger (platform auger) 37 is disposed within the platform 31. The rake auger 37 is mounted so as to be rotatable about the left-right direction as the rotational axis direction.

[0058] The cutter bar device 32 is disposed on the front lower end edge portion of the platform 31 and is configured in a pusher shape. A pair of left and right divider bodies 33, 33 are disposed so as to protrude forward from the left and right side portions on the front side of the platform 31. The rake reel 34 is a reel with a tine beam, and is disposed at a position above and in front of the rake auger 37. The rake reel 34 is rotatably supported between the distal end portions of a pair of left and right reel support arms 34a, 34a of the platform 31 at the base end portions, with the left-right direction as the rotational axis direction. The rake reel 34 functions continuously to rake the earing portions of the stalks while rotating, toward the rake auger 37. The power of the engine 25 transmitted through various transmission mechanisms is used for the operation of each portion of the cutting section 3.

[0059] A front rotor 26 that feeds the stalks conveyed by the conveyor 36 into the threshing port 7a is disposed on the rear side of the feed section 30. The front rotor 26 is disposed between the distal end of the conveyor 36 and the threshing port 7a. The front rotor 26 has a substantially cylindrical rotor body 27 called a threshing cylinder or the like, and a front rotor shaft 28 (see Figure 4 ) that has the left-right direction as the axial direction. The stalks conveyed from the feed section 30 are thrown into the inside of the threshing chamber 7b of the threshing section 7 from the threshing port 7a by the front rotor 26 at the distal end of the conveyor 36.

[0060] The conveyor 36 in the feed chamber 35 has a cutting section input shaft (feed chamber conveyor shaft) 38 that is disposed on the front side of the threshing section 7 and has the left-right direction as the axial direction, as a drive shaft that axially supports the distal end side thereof. The rear end portion of the feed section 30 is supported to the traveling body 2 in a rotatable manner with the cutting section input shaft 38 as the rotational axis. Further, a lift cylinder 39 that is a hydraulic cylinder is interposed between the lower surface portion of the feed chamber 35 and the body frame 6 (see Figure 1 ).

[0061] The cutting portion 3 is configured to perform a lifting operation in conjunction with a rotation of the supply portion 30 with respect to the traveling body 2, accompanying a telescopic operation of the lifting cylinder 39. The cutting portion 3 is configured to perform a height adjustment of the cutting portion 3 by a lifting operation of the cutting portion 3, with the cutting portion input shaft 38 as a rotation fulcrum. The lifting operation of the cutting portion 3 is operated by a prescribed operation portion provided in the driver's section 15.

[0062] The threshing portion 7 and the screening portion 8 will be described. The threshing portion 7 has a threshing cylinder 40 provided in a threshing chamber 7b with a threshing opening 7a opened on the front side, and a receiving net 42 disposed below the threshing cylinder 40. The threshing chamber 7b is formed by a machine frame provided on the body frame 6.

[0063] The threshing cylinder 40 is rotatably supported by a threshing cylinder shaft 41 (see Figure 4 ) extending in the front-rear direction as an axial direction. A plurality of dust delivery valves for adjusting a delivery speed (residence time) of threshed material in the threshing chamber 7b are provided on the upper side of the threshing cylinder 40 in a manner that the angle can be adjusted. The receiving net 42 allows the grains to leak downward and is provided along the outer peripheral surface of the lower portion of the threshing cylinder 40.

[0064] The screening portion 8 has a swing screening disc 43 as a swing portion disposed below the receiving net 42, a swing mechanism 44 including a swing shaft 44a that swings the swing screening disc 43 using rotational power from a drive source, a first grade conveyor 45, a second grade conveyor 46, and a grain elevator 47 (see Figure 4 ). Further, as shown in Figure 4 , a primary fan 71 is provided in front of the grain elevator 47, and a secondary fan 72 is provided behind the grain elevator 47.

[0065] The swing screening disc 43 has a structure for supplying the grains, a coarse screen disposed behind the supply disc and adjusting the amount of grains leaking downward, and a grain screen disposed below the coarse screen for specific gravity screening. The first grade conveyor 45 is disposed in a first grade guide groove extending in the body width direction in a manner that the first grade grains are collected. The second grade conveyor 46 is disposed in a second grade guide groove extending in the body width direction at a position behind the first grade conveyor 45 in a manner that the second grade grains are collected. The grain elevator 47 blows screening air through from the front lower side to the rear upper side to the swing screening disc 43.

[0066] A reduction conveyor 48 (see Figure 4The reducing conveyor 48 is disposed so that the lower end portion is located in the vicinity of the second-rate conveyor 46 and is connected to the second-rate conveyor 46, and so that the upper end portion is located in the vicinity of the front end portion of the threshing cylinder 40, thereby extending in an inclined manner with the upper portion being higher than the lower portion. A chaffer conveyor 49 extending in the vertical direction is disposed on the right side of the reducing conveyor 48. The chaffer conveyor 49 conveys the first-rate to the grain tank 10.

[0067] With the combine harvester 1 having the above-described structure, the cutting portion 3 is raised to a desired height (cutting height of the ear of the harvested crop) with respect to the ground by the lifting action of the feed portion 30 centered on the cutting portion input shaft 38 (pivot), from the working state to the working state, and the combine harvester 1 travels using the traveling body 2 in this state. As a result, the combine harvester 1 divides the harvested crop into the cutting object and the non-cutting object by the left and right divider plates 33, 33, and cuts the ear of the cutting object using the rake-and-pull reel 34 while raking and pulling the pod portion on the ear of the cutting object, and cuts the pod portion of the ear using the sickle bar 32.

[0068] The pod portion of the ear cut at the desired cutting position is raked into the platform 31 by the raking auger 37 driven in rotation, and is gathered in the vicinity of the intake port of the feed chamber 35 in the platform 31 by the conveying action of the raking auger 37, and is taken into the feed chamber 35 from the intake port. The ear taken into the feed chamber 35 is conveyed from the feed chamber 35 by the conveyor 36, and is thrown into the threshing port 7a by the front rotor 26 and is supplied to the threshing portion 7.

[0069] The pod portion of the ear supplied to the threshing portion 7 is subjected to the threshing process by the threshing portion 7. Specifically, the ear supplied to the threshing portion 7 is conveyed toward the rear by the rotating threshing cylinder 40 while being threshed mainly between the threshing cylinder 40 and the receiving screen 42. The threshed material, such as grain, smaller than the mesh of the receiving screen 42, leaks downward from the receiving screen 42. The straw and the like, which are not leaked downward from the receiving screen 42, are discharged to the field from the dust discharge port provided at the rear of the screening portion 8 due to the conveying action of the threshing cylinder 40.

[0070] On the other hand, the grain subjected to the threshing process by the threshing portion 7 and leaked downward from the receiving screen 42 is subjected to the screening process by the screening portion 8. Specifically, the threshed material, which is threshed by the threshing cylinder 40 and leaked downward from the receiving screen 42, is screened by the specific gravity screening action of the oscillating screen 43 and the air screening action of the chaffer 47 to screen out the grain (first-rate), the mixture of the grain with the branch (second-rate), and the straw and the like, and is taken out.

[0071] The grains (firsts) that have fallen downward from the oscillating sieve 43 by the screening by the screening section 8 are conveyed to the grain tank 10 by the firsts conveyor 45 and a grain elevator conveyor 49 provided in connection with the firsts conveyor 45. The seconds are returned to the threshing start end side of the threshing cylinder 40 by the seconds conveyor 46 and a restoration conveyor 48 provided in connection with the seconds conveyor 46 and are subjected to the threshing process again. The straw chips and the like are discharged to the field from a dust discharge port provided at the rear of the screening section 8.

[0072] Next, the rotation of the drive shaft 25a is transmitted to the drive sprocket 5a of the crawler belt 5 by the first belt transmission mechanism 51. The rotation of the drive sprocket 5a is transmitted to the drive chain wheels 5b of the crawler belt 5 by the drive chain 5c. The rotation of the drive chain wheels 5b is transmitted to the ground by the crawler belt 5. Figure 4 The power transmission structure of the combine harvester 1 according to the present embodiment will be described. The combine harvester 1 is driven by the rotation power of the engine 25 to the cutting section 3, the traveling section 4, the threshing section 7, the screening section 8, and the grain storage section 9.

[0073] The engine 25 has a first output shaft 25a and a second output shaft 25b. The rotation power of the first output shaft 25a is transmitted to the traveling section 4, the threshing section 7, the screening section 8, and the cutting section 3. The rotation power of the second output shaft 25b is transmitted to the grain storage section 9. In addition, the engine 25 has a work machine pump shaft that drives a supply pump 54 that operates the lift cylinder 39 and the like.

[0074] With respect to the power transmission system to the traveling section 4, the rotation power of the first output shaft 25a is transmitted to the HST input shaft 52 by the first belt transmission mechanism 51 and is input to the transmission 53 including the traveling HST and the turning HST. Here, "HST" refers to a hydraulic type continuously variable transmission that transforms the hydraulic pressure generated by driving a hydraulic pump into rotation power again. The drive chain wheel 5a of the crawler belt 5 that constitutes the traveling section 4 is rotationally driven by the driving force of the transmission 53.

[0075] With respect to the power transmission system to the threshing section 7, the rotation power of the first output shaft 25a is transmitted to the threshing section input shaft 56 by the second belt transmission mechanism 55. The second belt transmission mechanism 55 is provided with a threshing clutch 57 that transmits the rotation power of the first output shaft 25a to the threshing section input shaft 56 in a manner that arbitrarily engages and disengages.

[0076] The rotation power of the threshing section input shaft 56 is transmitted to the threshing cylinder input shaft 59 by the third belt transmission mechanism 58. The rotation power of the threshing cylinder input shaft 59 is transmitted to the threshing cylinder shaft 41 via the threshing transmission 60. With respect to the rotation power input from the threshing cylinder input shaft 59 to the threshing cylinder shaft 41, the threshing transmission 60 performs, for example, two-stage transmission of high speed / low speed.

[0077] According to this structure, the driving force of the engine 25 is transmitted to the threshing section 7. Moreover, the threshing clutch 57 is engaged / disengaged by operating the working clutch lever provided on the driver's unit 15, thereby switching the power transmission to the threshing section 7 on and off.

[0078] Regarding the power transmission system to the screening section 8, the threshing section input shaft 56 has a support shaft for the winnowing machine 47. The rotational power of the threshing section input shaft 56 is transmitted to the pulley rotating body 63, which is supported on the intermediate threshing shaft 62, via a fourth belt drive mechanism 61. The rotational power of the pulley rotating body 63 is transmitted to the primary fan 71 and the winnowing machine 47 via a predetermined transmission mechanism. In addition, the rotational power of the threshing section input shaft 56 is transmitted to the rotating shafts of the first-grade conveyor 45, the secondary fan 72, and the second-grade conveyor 46 via predetermined transmission mechanisms.

[0079] The rotational power of the first-grade conveyor 45 is transmitted to the winnowing conveyor 49 via a prescribed transmission mechanism. The rotational power of the second-grade conveyor 46 is transmitted to the swing shaft 44a of the swing mechanism 44 via the fifth belt drive mechanism 64. The rotational power of the second-grade conveyor 46 is transmitted to the reduction conveyor 48 via a bevel gear.

[0080] Regarding the power transmission system to the cutting section 3, the rotational power of the pulley rotating body 63 is transmitted to the front rotor shaft 28 via a sixth belt drive mechanism 73. A cutting clutch 75 is provided in the sixth belt drive mechanism 73 to transmit the rotational power of the pulley rotating body 63 to the front rotor shaft 28 in an arbitrarily engaging and disengaging manner. The rotational power of the front rotor shaft 28 is transmitted to the cutting section input shaft 38 via a first chain drive mechanism 65. The conveyor 36 within the feeding chamber 35 is operated by the rotational drive of the cutting section input shaft 38.

[0081] The rotational power of the harvesting section input shaft 38 is transmitted to the PF (platform) drive shaft 67 via the second chain drive mechanism 66. The rotational power of the PF drive shaft 67 is transmitted to the PF auger shaft 37a, which rotates the harrowing auger 37, via the third chain drive mechanism 68. Additionally, the rotational power of the PF drive shaft 67 is transmitted to the cutter drive shaft 32a, which drives the cutter assembly 32, via the seventh belt drive mechanism 69. Furthermore, the rotational power of the PF drive shaft 67 is transmitted to the reel shaft 34b, which rotates the harrowing reel 34, via the fourth chain drive mechanism 76, which includes the reel sub-shaft 70.

[0082] With this structure, the driving force of the engine 25 is transmitted to the cutting unit 3. Furthermore, by operating the working clutch lever provided on the driver unit 15, the cutting clutch 75 is engaged / disengaged, thereby switching the power transmission to the cutting unit 3 on and off.

[0083] Regarding 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 via a power transmission mechanism including the grain bin intermediate shaft 77. The rotational power of the lower discharge conveyor 11 is transmitted to the longitudinal conveyor 12 via a bevel gear. The rotational power of the longitudinal conveyor 12 is transmitted to the grain discharge conveyor 13 via a predetermined transmission mechanism. Furthermore, as a structure that receives and drives the grain bin intermediate shaft 77, the grain storage section 9 includes an exhaust fan 78 and a compressor 79.

[0084] Regarding the combine harvester 1 with the above structure, utilizing... Figures 5 to 12 The feeding section 30, which is located between the cutting section 3 and the threshing section 7, will be described.

[0085] The feeding unit 30 has a conveyor 36 in the feeding chamber 35 that drives the cutting section input shaft 38, which is rotated by receiving power from the engine 25 in the manner described above.

[0086] The feeding chamber 35 has left and right side portions 101, a lower surface portion 102, and an upper surface portion 103, forming a cylindrical body with openings at both the front and rear ends. At the front end of the feeding chamber 35, an approximately horizontally elongated rectangular opening 104 is formed at the front ends of each of the left and right side portions 101, the lower surface portion 102, and the upper surface portion 103. Furthermore, at the rear end of the feeding chamber 35, an approximately horizontally elongated rectangular opening 105 is formed at the rear ends of each of the left and right side portions 101, the lower surface portion 102, and the upper surface portion 103. A support bracket 106 is provided at the front of the lower surface portion 102 of the feeding chamber 35 to support the front end of the lifting cylinder 39 so that it can rotate.

[0087] The conveyor 36 is configured as a slat conveyor having the following components: a chain 110, which is arranged parallel to each other on the left and right sides within the feeding chamber 35; and slats 120 as a plurality of conveyor plates, which are mounted between the left and right chains 110.

[0088] The slat 120 is disposed on the outer periphery of the chain 110. The slat 120 is a slender component with the length direction of the mounting direction (left-right direction) between the left and right chains 110, and is a curved plate-shaped component with an approximately "U" shaped cross-section.

[0089] As part of the approximately "U"-shaped cross-section, the slat 120 has: a bottom portion 121, which forms the fixed portion of the slat 120 relative to the chain 110; and a front wall portion 122 and a rear wall portion 123, which stand at right angles to the bottom portion 121 from the front and rear sides of the chain 110 in the direction of rotation, forming the front and rear walls. Furthermore, the height of the front wall portion 122 starting from the bottom portion 121 is lower than that of the rear wall portion 123.

[0090] The left and right ends of the slat 120 are respectively fixed to the left and right chains 110 by bolts 125 and nuts 126. The chain 110 has a structure in which multiple inner and outer links, which are chain elements, are alternately combined and connected into a ring shape, and has an outer link 111 for mounting the slat 120 at predetermined intervals in the extending direction.

[0091] The pair of outer plates 112 constituting the mounting outer link 111 have mounting portions 112a that fix and support the strips 120, in addition to the main plate portion constituting the main body portion of the chain 110. The mounting portion 112a is a plate-shaped portion formed by bending outward to the left and right along the outer periphery of the chain 110 in a right-angle manner together with the main plate portion of the outer plate 112.

[0092] The slats 120 are positioned relative to each chain 110 such that the left and right ends of the bottom portion 121 overlap with the left and right mounting portions 112a of the outer plate 112 from the outer periphery of the chain 110, and are secured using bolts 125 and nuts 126. The bolts 125 pass through the bottom portion 121 and the mounting portion 112a and are screwed into the nuts 126. Regarding the conveyor 36 according to this embodiment, 11 slats 120 are installed on the left and right chains 110 at predetermined intervals in the extending direction of the chains 110.

[0093] The chain 110 is wound around: a sprocket 113, which is configured to rotate integrally with the cutting section input shaft 38; and a front roller 130, which is a cylindrical rotating body, located at its front end within the feeding chamber 35. That is, the chain 110 is wound in a loop around the sprocket 113 and the front roller 130, and is driven by the rotation of the sprocket 113 accompanying the rotation of the cutting section input shaft 38, thereby maintaining the wound state while moving the slat 120. The conveyor 36 is configured such that the sprocket 113 and the front roller 130 are each entirely located within the feeding chamber 35.

[0094] The cutting section input shaft 38 is configured to pass through the left and right side portions 101 of the feeding chamber 35 and rotate relative to the side portions 101 by means of bearing components such as cylindrical bushings. The sprocket 113 is fixed to the left and right ends of the mounting portion within the feeding chamber 35 of the cutting section input shaft 38 using bolts or other fasteners. The sprocket 113 engages the rear portion of the chain 110.

[0095] A cylindrical anti-winding cylinder 115 is provided between the cutting section input shaft 38 and the left and right sprockets 113. The anti-winding cylinder 115 is a hollow cylindrical portion that is concentrically arranged with the cutting section input shaft 38 and has a cylindrical outer circumferential surface with a diameter smaller than that of the sprockets 113. The anti-winding cylinder 115 is fixed to the cutting section input shaft 38 by bolts or other fasteners (not shown) and is configured to rotate integrally with the cutting section input shaft 38. The anti-winding cylinder 115 is provided along the entire range between the left and right sprockets 113 in the axial direction of the cutting section input shaft 38.

[0096] The front roller 130 is rotatably supported on a rotating body support shaft 116 located near the front end of the feeding chamber 35. The rotating body support shaft 116 passes through the left and right side portions 101 of the feeding chamber 35 in the left-right direction and is fixed relative to the left and right side portions 101.

[0097] The front roller 130 is a hollow cylindrical rotating body concentrically arranged with the rotating body support shaft 116. The front roller 130 has: a roller body 131 as a cylindrical component, which is open at both ends in the axial direction; and a pair of cylindrical covers 132 as cylindrical components, which cover the two ends of the roller body 131 in the axial direction.

[0098] The roller body 131 is a cylindrical body that forms the outer shape of the front roller 130, and has a generally integral length extending axially between the left and right side portions 101 of the feeding chamber 35. The thickness (plate thickness) of the peripheral wall of the roller body 131 is set to be sufficiently smaller than the outer diameter of the front roller 130. Near the left and right ends inside the roller body 131, there are circular plate-shaped support wall portions 134 that form support portions relative to the rotating body support shaft 116. The support wall portions 134 are partition-like portions with the plate thickness direction in the left and right direction, thus dividing the internal space of the roller body 131 in the left and right direction.

[0099] The support wall portion 134 allows the central portion of the rotating body support shaft 116 to pass through it, and it is rotatably supported on the rotating body support shaft 116 by means of the shaft support member 135 and the bearing 136. The shaft support member 135 is a member that passes through the central portion of the support wall portion 134 and forms a partition-like portion together with the support wall portion 134. With the central portion of the rotating body support shaft 116 passing through it, it is fixed to the support wall portion 134 by bolts 137 or the like with the left-right direction as the axial direction. The bearing 136 supports the rotating body support shaft 116 on the shaft support member 135 with the rotating body support shaft 116 passing through it.

[0100] The cylindrical cover 132 covers approximately 1 / 7 to 1 / 5 of the overall length of the roller body 131, starting from the open end of the roller body 131, on both the left and right ends and along the entire circumference. The thickness of the peripheral wall of the cylindrical cover 132 is approximately the same as that of the peripheral wall of the roller body 131. However, the relationship between the thicknesses of the roller body 131 and the cylindrical cover 132 is not limited. The cylindrical cover 132 is fixed to the roller body 131 by welding or the like, with its inner peripheral surface in contact with the outer peripheral surface of the roller body 131.

[0101] The cylindrical cover 132 has an inner edge in the left and right directions formed as an extension 132a that gradually increases in diameter from the outer left and right sides to the inner side. An annular sealing member 138, such as an O-ring, is clamped in the gap between the cylindrical cover 132 based on the extension 132a and the outer peripheral surface of the roller body 131.

[0102] The front roller 130, having the above structure, has as its outer peripheral surface: an end outer peripheral surface 130a, which is formed by the outer peripheral surfaces of the cylindrical covers 132 at both ends; and a middle outer peripheral surface 130b, which is the portion of the outer peripheral surface of the roller body 131 exposed between the left and right cylindrical covers 132. The wall thickness of the cylindrical covers 132 is sufficiently smaller than the outer diameter of the front roller 130, and the end outer peripheral surface 130a and the middle outer peripheral surface 130b form substantially coplanar outer peripheral surfaces on the front roller 130. Furthermore, at the boundary portions of the left and right end outer peripheral surfaces 130a and the middle outer peripheral surface 130b, an extension portion 132a and a sealing member 138 form a protrusion 130c along the outer peripheral surface of the front roller 130.

[0103] The front roller 130 receives the front portions of the left and right chains 110. The chains 110 are wound onto the cylindrical cover 132 relative to the front roller 130. Specifically, the chains 110 are located near the left and right outer sides of the protrusions 130c relative to the front roller 130. The protrusions 130c limit the misalignment of the chains 110 in the left and right directions.

[0104] Dust covers 139, which are circular plate-shaped components that close the openings at both ends of the roller body 131, are provided on the left and right sides of the front roller 130. The dust covers 139 have an outer diameter that is approximately the same as the inner diameter of the roller body 131. With the circular plate-shaped main body overlapping the side portion 101 of the feeding chamber 35 from the inside, they are fixed to the side portion 101 by a plurality of bolts 140 through which the side portion 101 and the dust cover 139 pass. The dust covers 139 have peripheral wall portions that stand upright from the circular plate-shaped main body portions to the left and right inner sides. With a portion of the peripheral wall portions fitting into the opening ends of the roller body 131, they are engaged with the roller body 131.

[0105] A tension adjustment mechanism 145 for adjusting the tension of the chain 110 is provided on the outer side of the side portion 101 of the feed chamber 35, which protrudes from the left and right ends of the rotating body support shaft 116. The tension adjustment mechanism 145 has an adjustment shaft 146 that passes through the end of the rotating body support shaft 116 in the radial direction.

[0106] When viewed from the side, the adjusting shaft 146 is inclined in a direction that is lower in the front and higher in the back, along the conveying direction of the conveyor 36. It is fixed to the side portion 101 of the feeding chamber 35 by means of support components such as a strut 147 and bolts such as bolts 149, with the portion protruding from the front of the rotating support shaft 116 being fixed to the side portion 101 of the feeding chamber 35. The tension adjusting mechanism 145 is configured such that by operating the adjusting nut 148, which engages with the protruding portion of the adjusting shaft 146 that protrudes rearward from the rotating support shaft 116, the position of the rotating support shaft 116 relative to the side portion 101 of the feeding chamber 35 is adjusted, thereby adjusting the front-rear position of the front roller 130 and the tension of the chain 110.

[0107] Based on the above structure, the cutting section input shaft 38 rotates counterclockwise (leftward rotation direction) when viewed from the left (see reference). Figure 6 (Arrow A1) This causes the conveyor 36 to be driven in the forward direction, so that the stalks taken in by the rake auger 37 into the feeding chamber 35 are hooked onto the slats 120 and conveyed obliquely upward and backward. That is, when the conveyor 36 is driven, the path portion of the straight chain 110 located below the sprocket 113 and the front roller 130 becomes the outgoing path portion moving from the front to the rear, and the path portion of the straight chain 110 located above the sprocket 113 and the front roller 130 becomes the return path portion moving from the rear to the front. The stalks conveyed by the conveyor 36 are fed from the feeding chamber 35 to the threshing section 7 from the threshing port 7a by the action of the front rotor 26.

[0108] As described above, the feeding section 30 on the conveyor 36 includes: a front roller 130, which is disposed at the front of the feeding section 30 in the conveying direction; a sprocket 113, which rotates integrally with the cutting section input shaft 38 disposed at the rear of the feeding section 30 in the conveying direction; left and right chains 110, which are wound around the front roller 130 and the sprocket 113; and a plurality of slats 120, which are mounted between the left and right chains 110.

[0109] Regarding this structure of the conveyor 36, the slats 120 are wound around the front roller 130, which receives the front portions of the left and right chains 110. The two ends of the slats 120 in the longitudinal direction are supported on the front roller 130 by means of the chains 110, and a gap exists between the middle portion of the slats 120 in the longitudinal direction and the middle outer peripheral surface 130b of the front roller 130. That is, the slats 120 such that the chains 110 are positioned between them and the outer peripheral surface of the front roller 130; correspondingly, the slats 120 are separated from the outer peripheral surface of the front roller 130 in the radial direction, and a gap exists between the portions of the left and right chains 110 and between them and the middle outer peripheral surface 130b.

[0110] Therefore, the conveyor 36 has a slat support portion 150 that supports the slat 120 on the front roller 130. The slat support portion 150 is provided on the outer periphery of the front roller 130 and supports the middle part of the slat 120 in the length direction from the inner periphery of the winding shape of the chain 110.

[0111] The slat support portion 150 includes: a cylindrical portion 151 serving as a contact portion, which forms a contact surface that contacts the slat 120; and an annular portion 152 serving as a support base, which supports the cylindrical portion 151 on the front roller 130. The slat support portion 150 is configured to be fixedly disposed on the front roller 130 and to be a portion that rotates integrally with the front roller 130.

[0112] The slat support portion 150 is configured such that a portion of the axial direction (left-right direction, hereinafter referred to as the "roller axial direction") of the front roller 130 is partially enlarged relative to the intermediate outer peripheral portion 130b. As a contact surface that contacts the slat 120, it has an outer peripheral support surface 155 that is a cylindrical surface with the same axis as the front roller 130. The outer peripheral support surface 155 becomes a sliding contact surface that slides in contact with the lower surface 121a of the bottom portion 121 of the slat 120, specifically the inner peripheral side of the chain 110 (see reference). Figure 11 ).

[0113] The cylindrical portion 151 is a cylindrical part with an outer diameter larger than that of the drum body 131 and the cylindrical cover 132. The outer peripheral surface of the cylindrical portion 151 becomes the outer peripheral support surface 155 of the slat support portion 150. The cylindrical portion 151 has: a cylindrical inner peripheral surface 153; and side end surfaces 154 on both sides of the cylindrical portion 151 in the width direction (drum axial direction) (see reference). Figure 10 , Figure 11 The side end face 154 is formed as a face perpendicular to the roller axis.

[0114] The annular portion 152 is a plate-shaped portion with the roller axis along the thickness direction, and it is an annular portion with an outer diameter that matches the inner diameter of the cylindrical portion 151 and an inner diameter that matches the outer diameter of the roller body 131. The annular portion 152 has plate surfaces 156 on both sides in the left-right direction.

[0115] The annular portion 152 makes the plate thickness smaller than the width of the cylindrical portion 151. Figure 10 The annular portion 152 (within the left-right dimension) is located at the center of the width direction relative to the cylindrical portion 151. In this embodiment, the thickness of the annular portion 152 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 151. The slat support portion 150, in a cross-sectional view passing through the axis of the rotating body support shaft 116 of the front roller 130, is formed in a T-shape by the cylindrical portion 151 and the annular portion 152 (see reference). Figure 10 ).

[0116] The slat support portion 150 has a rotating body shape with the rotation center line C1 of the front roller 130, which is aligned with the axis of the rotating body support shaft 116, as its axis. That is, the slat support portion 150 is arranged in a ring shape throughout the entire circumference of the front roller 130. In other words, the slat support portion 150 is configured by the cylindrical portion 151 and the annular portion 152 to form a constant T-shaped cross-sectional shape throughout the entire circumference of the front roller 130.

[0117] In addition, the slat support portion 150 uses the cylindrical portion 151 and the annular portion 152 to make the left and right sides open, and together with the roller body 131, it forms a recess 170 as an annular groove portion on the left and right sides.

[0118] In this embodiment, the slat support portion 150 is composed of two components: a first component 161, which is cylindrical, constituting the cylindrical portion 151; and a second component 162, which is annular, constituting the annular portion 152 (see reference). Figure 10 The first component 161 and the second component 162 are fixed to each other by welding and form an integral slat support 150.

[0119] Specifically, such as Figure 10 As shown, the second component 162 has: an annular surface forming the left and right plate surfaces 156 of the annular portion 152; an outer peripheral surface 163, which is the end face of the outer peripheral side; and an inner peripheral surface 164, which is the end face of the inner peripheral side. With the outer peripheral surface 163 of the second component 162 in contact with the inner peripheral surface of the first component 161, which forms the inner peripheral surface 153 of the cylindrical portion 151, the first component 161 and the second component 162 are fixed together by an outer peripheral weld portion 171 located at the corner formed by the inner peripheral surface (inner peripheral surface 153) of the first component 161 and the left and right plate surfaces (plate surfaces 156) of the second component 162, as shown in cross-section. The outer peripheral weld portion 171 is a welded portion, either integrally or partially, in the circumferential direction of the strip support portion 150.

[0120] Furthermore, regarding the first component 161 and the second component 162, the second component 162 is fixed to the roller body 131 and thus fixed to the front roller 130 by welding. Specifically, as follows... Figure 10 As shown, with the inner circumferential surface 164 of the second component 162 in contact with the middle outer circumferential surface 130b of the roller body 131, the second component 162 and the roller body 131 are fixed together by the inner circumferential side weld portion 172 located at the corner formed by the middle outer circumferential surface 130b and the left and right plate surfaces (plate surfaces 156) of the second component 162 in cross-section. The inner circumferential side weld portion 172 is a welded portion that is integral or partial in the circumferential direction of the roller body 131.

[0121] Furthermore, the methods for fixing the first component 161 and the second component 162, as well as the methods for fixing the second component 162 and the roller body 131, are not particularly limited. For example, a method based on bolts or other fasteners can be used to fix the aforementioned components. Additionally, the components constituting the slat support portion 150 can be, for example, integrally molded parts (one component) such as castings.

[0122] The dimensions of each part of the slat support 150 are as follows, for example. Figure 10 As shown, the width dimension D1 of the slat support portion 150, i.e., the width dimension D1 of the outer peripheral support surface 155, is, for example, 30 mm. Furthermore, the thickness dimension T1 of the cylindrical portion 151 is, for example, 3.0 mm. Additionally, the thickness dimension T2 of the annular portion 152 is, for example, 3.5 mm. Furthermore, the height dimension H1 of the annular portion 152 is, for example, 20 mm. Moreover, the height dimension H1 is the dimension between the central outer peripheral surface 130b and the outer peripheral surface 163 in the radial direction of the front roller 130.

[0123] In this embodiment, the thickness T1 of the cylindrical portion 151 and the thickness T2 of the annular portion 152 are greater than the thickness T3 of the peripheral wall of the roller body 131. Furthermore, the dimensions of each part of the slat support portion 150 are merely one example, and the dimensions of each part are not limited.

[0124] The slat support portion 150 is provided at multiple locations in the direction of rotation axis of the front roller 130. In this embodiment, the slat support portion 150 is provided at two locations on the left and right sides of the middle outer peripheral surface 130b in a symmetrical arrangement.

[0125] The width dimension D1 of the slat support portion 150 is approximately 1 / 15 to 1 / 20 of the overall length (left-right dimension) of the roller body 131. Furthermore, this width dimension D1 is approximately 1 / 10 to 1 / 13 of the left-right dimension of the central outer peripheral surface portion 130b. Each slat support portion 150 is positioned at the center of its respective left and right halves of the central outer peripheral surface portion 130b in the left-right direction.

[0126] Furthermore, in this embodiment, the slat support portions 150 are provided at two locations along the roller axial direction, but the number and arrangement positions of the slat support portions 150 are not particularly limited. For example, as Figure 12 As shown in Figure A, the slat support portion 150 can be provided at three or more locations. Figure 12 In the example shown in A, a structure is illustrated where the slat support 150 is positioned at three locations. Additionally, in... Figure 12 In the example shown in A, a structure is presented in which the width of the slat support 150 is slightly reduced compared to a structure in which the slat support 150 is disposed at two locations.

[0127] In addition, such as Figure 12 As shown in Figure B, the slat support 150 can be located at a central position along the axial direction of the roller. Figure 12 In the example shown in B, a structure with an increased width of the slat support 150 is illustrated compared to a structure with multiple slat support portions 150. For example... Figure 8 , Figure 12 A, Figure 12 As shown in B, the preferred configuration of one or more slat support portions 150 is symmetrical from left to right.

[0128] According to the combine harvester 1 of this embodiment with the above structure, it is possible to suppress the deflection of the slats 120 subjected to external forces such as ear stalks, and to suppress the wear of the support portion of the slats 120 constituting the feed section 30, thereby improving the durability of the conveyor 36.

[0129] The conveyor 36 has a slat support 150 mounted on the front roller 130. The slat support 150 includes a cylindrical portion 151, which forms an outer peripheral support surface 155 that serves as the contact surface with the slat 120; and an annular portion 152 that supports the cylindrical portion 151 on the front roller 130. With this structure, the cylindrical portion 151 with the outer peripheral support surface 155 can support the middle portion of the slat 120 in a surface contact manner, thus reducing the support pressure on the slat 120. This alleviates stress concentration in the supported portion of the slat 120 and suppresses wear. As a result, the durability of the slats 120 and the like constituting the conveyor 36 is improved.

[0130] Furthermore, the slat support portion 150 is provided at multiple locations along the roller axial direction. With this structure, the support portion of the slat 120 is increased, thus easily ensuring the area of ​​the support surface, effectively suppressing wear on the support portion of the slat 120, and stably supporting the slat 120.

[0131] Furthermore, the slat support portion 150 has a rotating body shape with the rotation center line C1 of the slat 120 as its axis. With this structure, the outer peripheral support surface 155, which serves as the support surface relative to the slat 120, is formed throughout the entire circumference of the front roller 130. Therefore, the supporting effect of the slat support portion 150 on the plurality of slats 120 can be kept constant, and the wear amount of the supporting portion of each slat 120 can be made uniform. Moreover, because the supporting effect of the slats 120 of the slat support portion 150 relative to the front roller 130 is constant, stable conveying operation of the conveyor 36 can be achieved.

[0132] [Second Implementation]

[0133] use Figures 13 to 15 The second embodiment of the present invention will be described. Furthermore, in the embodiments of the present invention described below, structures common to or corresponding to the first embodiment are referred to by the same names or the same reference numerals, and repeated descriptions are appropriately omitted.

[0134] like Figures 13 to 15 As shown, the slat support portion 150A according to this embodiment has: a cylindrical portion 251 serving as a contact portion, which forms a contact surface that contacts the slat 120; and an annular portion 252 serving as a support base, which supports the cylindrical portion 251 on the front roller 130. The slat support portion 150A is configured to be fixedly provided on the front roller 130 and to be a portion that rotates integrally with the front roller 130.

[0135] The slat support portion 150A, which is the contact surface that contacts the slat 120, has an outer peripheral support surface 255 that is the same cylindrical surface as the front roller 130 as the axis.

[0136] The cylindrical portion 251 is a cylindrical part with an outer diameter larger than that of the roller body 131 and the cylindrical cover 132. The outer peripheral surface of the cylindrical portion 251 becomes the outer peripheral support surface 255 of the slat support portion 150A. The cylindrical portion 251 has: a cylindrical inner peripheral surface 253; and one side in the width direction of the cylindrical portion 251 (…). Figure 14 The right side face 254 (in the middle). The side face 254 is formed as a face perpendicular to the roller axis.

[0137] The annular portion 252 is a plate-shaped portion with the roller axis along the thickness direction, and is an annular portion with an inner diameter that matches the outer diameter of the roller body 131. The annular portion 252 has plate surfaces 256 on both sides in the left-right direction.

[0138] The annular portion 252 makes the plate thickness smaller than the width of the cylindrical portion 251. Figure 14 The left-right dimension), relative to the cylindrical portion 251, is located at the end in the width direction ( Figure 14(Left end of the middle). In this embodiment, the thickness of the annular portion 252 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 251. The slat support portion 150A is L-shaped in a cross-sectional view passing through the axis of the rotating body support shaft 116 of the front roller 130, consisting of the cylindrical portion 251 and the annular portion 252 (see reference). Figure 14 That is, the cylindrical portion 251 and the annular portion 252 are formed in... Figure 14 The sectional view shown contains right-angled corners.

[0139] The slat support portion 150A has a rotating body shape with the rotation center line C1 of the front roller 130 as its axis. That is, the slat support portion 150A is arranged in a ring shape throughout the entire circumference of the front roller 130. In other words, the slat support portion 150A is arranged in a constant L-shaped cross-sectional shape throughout the entire circumference of the front roller 130 using the cylindrical portion 251 and the annular portion 252.

[0140] Furthermore, the slat support portion 150A is positioned on the opposite side of the arrangement side of the annular portion 252 relative to the cylindrical portion 251 in the left-right direction. Figure 14 The right side of the drum is set as an open side and together with the drum body 131 forms a recess 270 as an annular groove.

[0141] like Figure 15 As shown, in this embodiment, the slat support portion 150A is composed of an annular, integral support portion forming member 260. The support portion forming member 260 is, for example, an integrally formed product such as a stamped product or a cast product.

[0142] Specifically, such as Figure 14 and Figure 15 As shown, the support forming member 260 has: a cylindrical peripheral wall portion 261, which constitutes the cylindrical portion 251; and an annular side portion 262, which is part of the annular portion 252, and together with the peripheral wall portion 261 forms a right-angled corner portion in the cross-sectional view. The peripheral wall portion 261 has: an outer peripheral surface, which constitutes the outer peripheral support surface 255; an annular end face, which constitutes the side end face 254; and an inner peripheral surface, which constitutes the inner peripheral surface 253. The side portion 262 has: an annular surface, which constitutes the left and right plate surfaces 256 of the annular portion 252; and an inner peripheral surface 264, which is the end face of the inner peripheral side.

[0143] The support forming component 260 is fixed to the front roller 130 by welding to the roller body 131. Specifically, as... Figure 14As shown, with the inner circumferential surface 264 of the support forming member 260 in contact with the middle outer circumferential surface 130b of the roller body 131, the support forming member 260 and the roller body 131 are fixed together by the inner circumferential side weld portion 272 located at the corner formed by the middle outer circumferential surface 130b and the left and right plate surfaces (plate surfaces 256) of the side surface portion 262 of the support forming member 260 in cross-section. The inner circumferential side weld portion 272 is a welded part that is integral or partial in the circumferential direction of the roller body 131.

[0144] Furthermore, the method of fixing the support forming member 260 and the roller body 131, as well as the structure of the support forming member 260, are not particularly limited. Additionally, as a method of fixing the support forming member 260 relative to the front roller 130, a method based on fasteners such as bolts can be used. Furthermore, the support forming member 260 can, for example, have a structure in which the peripheral wall portion 261 and the side portion 262 are composed of separate components, and these components are fixed together by welding or the like.

[0145] The dimensions of each part of the slat support section 150A are as follows, for example. Figure 14 As shown, the width dimension of the slat support portion 150A, i.e., the width dimension D2 of the outer peripheral support surface 255, is, for example, 20 mm. Furthermore, the thickness dimension T4 of the cylindrical portion 251 and the thickness dimension T5 of the annular portion 252 are, for example, values ​​in the range of 3.0 to 3.5 mm. Moreover, when the support portion forming component 260 is formed from a sheet of constant thickness by stamping or the like, the thickness dimension T4 of the cylindrical portion 251 and the thickness dimension T5 of the annular portion 252 are the same value.

[0146] In this embodiment, the thickness T4 of the cylindrical portion 251 and the thickness T5 of the annular portion 252 are greater than the thickness T3 of the peripheral wall of the roller body 131. Furthermore, the dimensions of each part of the slat support portion 150A are merely one example, and the dimensions of each part are not limited.

[0147] According to the structure of the slat support portion 150A as described in this embodiment, the same effects as in the first embodiment can be obtained. Furthermore, compared to the structure of the slat support portion 150A in the first embodiment, which utilizes two components, the first component 161 and the second component 162, the slat support portion 150A can be constructed from a support portion forming component 260, which is an integrally molded product. Therefore, it is possible to reduce, for example, welding time, and to easily install the slat support portion 150A with a simpler process and at a lower cost.

[0148] Furthermore, in this embodiment, the slat support portion 150A has its left and right sides designated as open sides of the recess 270. However, the structure in which the slat support portions 150A are arranged at two locations on the left and right sides can be configured as follows: the open sides of the recesses 270 of the two slat support portions 150A are made to be common in the left-right direction, or the open sides can be made to be opposite to each other, or the open sides can be made to be opposite each other. Figure 13 In the example shown, the open side of the slat support portion 150A at the left and right locations is the common side (the left side of the body).

[0149] [Third Implementation Method]

[0150] use Figure 16 and Figure 17 The third embodiment of the present invention will be described. Figure 17 yes Figure 16 A sectional view from the XX direction. Furthermore, in Figure 16 In the middle, for convenience, a sectional view is shown in a cut-out shape in a localized area.

[0151] like Figure 16 As shown, the slat support portion 150B according to this embodiment is inclined relative to a direction orthogonal to the rotation center line C1 of the front roller 130. That is, the slat support portion 150B is a portion formed along the circumference of the front roller 130, and in the front view of the front roller 130, it is inclined at a predetermined angle α1 relative to a surface orthogonal to the rotation center line C1. This is just one example. Figure 16 In the example shown, the tilt angle α1 is approximately 30°.

[0152] The slat support portion 150B according to this embodiment includes: an inclined cylindrical portion 351 serving as a contact portion, which forms a contact surface that contacts the slat 120; and an inclined annular portion 352 serving as a support base, which supports the inclined cylindrical portion 351 on the front roller 130. The slat support portion 150B is configured to be fixedly provided on the front roller 130 and to be a portion that rotates integrally with the front roller 130.

[0153] The slat support portion 150B, as the contact surface that contacts the slat 120, has an outer peripheral support surface 355 that is the same as the cylindrical surface of the front roller 130 along the axis.

[0154] The inclined cylindrical portion 351 is a cylindrical part with an outer diameter larger than that of the roller body 131 and the cylindrical cover 132. The outer peripheral surface of the inclined cylindrical portion 351 becomes the outer peripheral support surface 355 of the slat support portion 150B. The inclined cylindrical portion 351 has: an inner peripheral surface 353, which is the surface opposite to the outer peripheral support surface 355; and side end surfaces 354 on both sides in the width direction of the inclined cylindrical portion 351. The side end surfaces 354 are formed as elliptical annular surfaces inclined along an inclined surface relative to the rotation center line C1.

[0155] The inclined annular portion 352 is a plate-shaped portion that is inclined at an angle α1 relative to the roller axis with the thickness direction as the plate direction, and is an elliptical annular portion with the inner diameter being the same as the outer diameter of the roller body 131. The inclined annular portion 352 has plate surfaces 356 on both sides in the left and right directions.

[0156] The inclined annular portion 352 has a plate thickness smaller than the width of the inclined cylindrical portion 351 and is located at the center of the roller axial direction relative to the inclined cylindrical portion 351. In this embodiment, the plate thickness of the inclined annular portion 352 is approximately the same as the thickness of the peripheral wall portion of the inclined cylindrical portion 351. The slat support portion 150B, in a cross-sectional view passing through the axis of the rotating body support shaft 116 of the front roller 130, is formed by the inclined cylindrical portion 351 and the inclined annular portion 352 in an inclined T-shape (see reference). Figure 16 ).

[0157] The slat support portion 150B is arranged in a ring shape throughout the circumference of the front roller 130. In other words, the slat support portion 150B is arranged in a constant inclined T-shaped cross-sectional shape throughout the circumference of the roller 130 using the inclined cylindrical portion 351 and the inclined annular portion 352. Moreover, due to its inclination relative to the plane perpendicular to the rotation center line C1, the position of the T-shaped cross-sectional shape in the roller axial direction gradually changes according to the circumferential position of the front roller 130.

[0158] In addition, the slat support portion 150B uses the inclined cylindrical portion 351 and the inclined annular portion 352 to make the left and right sides open, and together with the roller body 131, it forms a recess 370 as an elliptical annular groove.

[0159] Similar to the first embodiment, the slat support portion 150B is composed of two parts: a first part, which is an inclined cylindrical part 351, and a second part, which is an elliptical ring part 352. These parts are fixed to each other by welding, and the second part is fixed to the roller body 131 by welding. Furthermore, the parts constituting the slat support portion 150B can be, for example, integrally molded as in the second embodiment.

[0160] The slat support portions 150B are provided at multiple locations along the rotation axis of the front roller 130. In this embodiment, the slat support portions 150B are provided at two locations on the left and right sides of the central outer peripheral surface 130b in a symmetrical arrangement. Furthermore, similar to the first embodiment, the number and arrangement positions of the slat support portions 150B are not particularly limited.

[0161] By incorporating the slat support portion 150B as described in this embodiment, the same effects as in the first embodiment can be achieved. Furthermore, due to the inclined arrangement of the slat support portion 150B, the portion of the outer peripheral support surface 355 that acts on the slat 120 as the front roller 130 rotates can be expanded along the roller axial direction. This effectively suppresses wear on the support portion of the slat 120 provided by the slat support portion 150B, thereby improving the durability of the conveyor 36.

[0162] Furthermore, the slat support portion 150B has an inclined T-shaped cross-sectional shape, but it can also be configured as an L-shaped cross-sectional shape as the slat support portion 150A according to the second embodiment.

[0163] [Fourth Implementation Method]

[0164] use Figure 18 The fourth embodiment of the present invention will be described.

[0165] like Figure 18 As shown, the slat support 150C in this embodiment is inclined so as to exert a conveying action on the stalks (crops) towards the inner side in the left-right direction of the machine body. That is, the slat support 150C is inclined to convey the stalks (crops) taken from the opening 104 into the feeding chamber 35. Figure 6 The conveying action applied to the roller body 131 is spiral-shaped along the middle outer peripheral surface 130b of the roller body 131 with the rotation center line C1 as the center. The spiral line along the arrangement of the slat support portion 150C on the middle outer peripheral surface 130b of the roller body 131 is a straight line in the unfolded view of the middle outer peripheral surface 130b.

[0166] Furthermore, as a slat support 150C, a right-side slat support 150Ca is provided, which is located on the right side of the roller body 131. Figure 18 (left side); and left slat support 150Cb, which is disposed on the left side of the roller body 131 (left side); Figure 18 The right side of the drum (right side). The right side slat support 150Ca is positioned to the left in the direction of the conveying action along the axial direction of the drum ( Figure 18 (Right side of the middle), the left slat support 150Cb is on the right side with respect to the direction of the conveying action ( Figure 18 (Left side of the middle).

[0167] The slat support portion 150C according to this embodiment has: a spiral-shaped outer peripheral side surface portion 451 as a contact portion, which forms a contact surface that contacts the slat 120; and a spiral-shaped support surface portion 452 as a support base, which supports the outer peripheral side surface portion 451 on the front roller 130. The slat support portion 150C is configured to be fixedly provided on the front roller 130 and to be a portion that rotates integrally with the front roller 130.

[0168] The slat support portion 150C, as the contact surface that contacts the slat 120, has an outer peripheral support surface 455 that is the same cylindrical surface along the axis as the front roller 130.

[0169] The outer peripheral side surface 451 is a spiral portion along a cylindrical surface with an outer diameter larger than that of the roller body 131 and the cylindrical cover 132. The outer peripheral surface of the outer peripheral side surface 451 becomes the outer peripheral support surface 455 of the slat support portion 150C. The outer peripheral side surface 451 has: an inner peripheral surface 453, which is the surface opposite to the outer peripheral support surface 455; and side end surfaces 454 on both sides of the outer peripheral side surface 451 in the width direction.

[0170] The support surface 452 is a plate-shaped portion that extends approximately along the roller axis in the thickness direction, and is a spiral portion whose inner diameter matches the outer diameter of the roller body 131. The support surface 452 has plate surfaces 456 on both sides in the left-right direction.

[0171] The support surface 452 has a plate thickness smaller than the width of the outer peripheral side surface 451, and is located at the center of the outer peripheral side surface 451 in the width direction. In this embodiment, the plate thickness of the support surface 452 is approximately the same as the thickness of the peripheral wall portion of the outer peripheral side surface 451. In a cross-sectional view passing through the axis of the rotating body support shaft 116 of the front roller 130, the slat support portion 150C is T-shaped by the outer peripheral side surface 451 and the support surface 452.

[0172] The slat support portion 150C is formed in a spiral shape, with ends on both the outer and inner sides along the roller axis. That is, the slat support portions 150, 150A, and 150B involved in the above embodiments are all configured as annular, while the slat support portion 150C involved in this embodiment has ends on both sides along the roller axis.

[0173] In addition, the slat support portion 150C uses the outer peripheral side portion 451 and the support surface portion 452 to make the left and right sides open, and together with the roller body 131, it forms a recess 470 as a spiral groove portion on the left and right sides.

[0174] Similar to the first embodiment, the slat support portion 150C is composed of two parts: a first part, which is a spiral component, forming the outer peripheral side surface portion 451; and a second part, which is also a spiral component, forming the support surface portion 452. These parts are fixed to each other by welding, and the second part is fixed to the roller body 131 by welding. Furthermore, the parts constituting the slat support portion 150C can, for example, be integrally molded as in the second embodiment.

[0175] The slat support portions 150C are provided at multiple locations along the rotation axis of the front roller 130. In this embodiment, the slat support portions 150C are provided at two locations on the left and right sides of the central outer peripheral surface 130b in a symmetrical arrangement. Furthermore, similar to the first embodiment, the number and arrangement positions of the slat support portions 150C are not particularly limited. Additionally, the number of spiral turns of the slat support portions 150C is not limited.

[0176] Based on the structure of the slat support portion 150B as described in this embodiment, the same effects as in the third embodiment can be achieved. Furthermore, the spiral arrangement of the slat support portion 150C allows for the conveying of the ear of straw towards the left and right inwards, thus preventing the ear of straw and straw fragments from wrapping around or getting caught in the rotating body support shaft 116, the left and right chains 110, etc. (see reference). Figure 5 ).

[0177] Furthermore, the slat support portion 150C has an inclined T-shaped cross-sectional shape, but it can also be configured as an L-shaped cross-sectional shape, as in the slat support portion 150A according to the second embodiment.

[0178] [Fifth Implementation Method]

[0179] use Figure 19 and Figure 20 The fifth embodiment of the present invention will be described.

[0180] like Figure 19 and Figure 20 As shown, the slat support portion 150D according to this embodiment has: a cylindrical portion 551 serving as a contact portion, which forms a contact surface that contacts the slat 120; and left and right annular side portions 552 serving as a support base, which support the cylindrical portion 551 on the front roller 130. The slat support portion 150D is configured to be fixedly provided on the front roller 130 and to be a portion that rotates integrally with the front roller 130.

[0181] The slat support portion 150D, which is the contact surface that contacts the slat 120, has an outer peripheral support surface 555 that is the same cylindrical surface as the front roller 130 as the axis.

[0182] The cylindrical portion 551 is a cylindrical part with an outer diameter larger than that of the roller body 131 and the cylindrical cover 132. The outer peripheral surface of the cylindrical portion 551 becomes the outer peripheral support surface 555 of the slat support portion 150D. The cylindrical portion 551 has a cylindrical inner peripheral surface 553.

[0183] The side portion 552 is a plate-shaped portion with the roller axis along the thickness direction, and is an annular portion with its inner diameter matching the outer diameter of the roller body 131. Each side portion 552 has plate surfaces 556 on both sides in the left-right direction.

[0184] The side portion 552 makes the plate thickness smaller than the width of the cylindrical portion 551. Figure 20 The dimensions in the left-right direction are located at both ends in the width direction relative to the cylindrical portion 551. In this embodiment, the thickness of the side portion 552 is approximately the same as the thickness of the peripheral wall portion of the cylindrical portion 551. The slat support portion 150D is U-shaped in a cross-sectional view passing through the axis of the rotating body support shaft 116 of the front roller 130, consisting of the cylindrical portion 551 and the left and right side portions 552 (see reference). Figure 20 That is, the cylindrical portion 551 and the left and right side portions 552 are in Figure 20 The sectional view shown has right-angled corners on the left and right sides.

[0185] The slat support portion 150D has a rotating body shape with the rotation center line C1 of the front roller 130 as the axis. That is, the slat support portion 150D is arranged in a ring shape throughout the entire circumference of the front roller 130. In other words, the slat support portion 150D is arranged in a constant U-shaped cross-sectional shape throughout the entire circumference of the front roller 130 by means of the cylindrical portion 551 and the left and right side portions 552.

[0186] In this embodiment, the slat support portion 150D is constituted by an annular, integral support portion forming member 560. This support portion forming member 560 is, for example, a cast article or other integrally molded article. Figure 20 As shown, the support forming member 560 constituting the slat support portion 150D has: a cylindrical peripheral wall portion 561, which constitutes the cylindrical portion 551; and an annular side wall portion 562, which constitutes the left and right side side portions 552.

[0187] The support forming member 560 constituting the slat support portion 150D is fixed to the front roller 130 by welding to the roller body 131. Specifically, as... Figure 20As shown, with the inner circumferential surfaces 564 of the left and right sidewall surfaces 562 in contact with the middle outer circumferential surface 130b of the roller body 131, the support forming member 560 and the roller body 131 are fixed together by the inner circumferential side weld portion 572 located at the corner formed by the plate surface (plate surface 556) on the left and right outer sides of each sidewall surface 562 in the cross-sectional view. The inner circumferential side weld portion 572 is a welded part that is integral or partial in the circumferential direction of the roller body 131.

[0188] The slat support portion 150D forms an annular hollow portion on the outer periphery of the central outer peripheral portion 130b. That is, an annular space portion 580 is formed by the central outer peripheral portion 130b, the cylindrical portion 551 of the slat support portion 150D, and the left and right side portions 552.

[0189] Furthermore, the support forming member 560 constituting the slat support portion 150D may, for example, be a structure in which the peripheral wall portion 561 and the left and right side wall portions 562 are each composed of separate components, and the components are fixed to each other by welding or the like.

[0190] According to the structure of the slat support portion 150D as described in this embodiment, the same effect as in the second embodiment can be obtained. Furthermore, according to the structure of the slat support portion 150D as described in this embodiment, the portion supporting the cylindrical portion 551 on the front roller 130 is formed by the side portions 552 on both the left and right sides; therefore, the support strength of the slat support portion 150D on the slat 120 can be obtained.

[0191] [Sixth Implementation Method]

[0192] use Figure 21 and Figure 22 The sixth embodiment of the present invention will be described. Figure 22 yes Figure 21 A partial sectional view at the YY position. Furthermore, in Figure 21 The YY position is indicated by a double-dotted line for slat 120. Figure 22 The slat 120 is shown in solid line. Additionally, in... Figure 21 For convenience, the strip 120 in its removed state is shown in solid line.

[0193] like Figure 21 and Figure 22 As shown, in this embodiment, a recess 600 is provided on the slat 120 as an engaging portion that engages with the slat support portion 150E. The recess 600 is provided at two locations on the slat 120 corresponding to each of the slat support portions 150E located at two locations on the left and right sides relative to the front roller 130.

[0194] The recess 600 is the portion that fits the edge of the outer periphery of the slat support portion 150E. Regarding the slat 120, which has an approximately U-shaped cross-sectional shape consisting of a bottom portion 121, a front wall portion 122, and a rear wall portion 123, the recess 600 forms a space that corresponds to the shape of the outer periphery of the slat support portion 150E, with the bottom portion 121 side (the inner periphery side of the chain 110) of the slat 120 being an open side, and is formed as a cutout in a rectangular manner in the front view.

[0195] The recess 600 is formed by the following components: left and right side end faces 601, which are opposite each other in the left-right direction; and outer peripheral side end faces 602, which are formed on various parts of the front wall portion 122 and the rear wall portion 123. The side end faces 601 are in the width direction covering the bottom portion 121 (relative to) Figure 22 The strip 120 shown in the figure (in the left-right direction) forms an approximately U-shaped surface with the range of the entirety of the front wall portion 122 and the inner peripheral side portion of the rear wall portion 123.

[0196] Thus, the portion of the recess 600 corresponding to each slat support portion 150E in the left-right direction of the slat 120 is formed such that the entire bottom portion 121 and the portions of the inner periphery of the front wall portion 122 and the rear wall portion 123 form a cut-out shape.

[0197] In this embodiment, the recess 600 has a width dimension in the width direction (left-right direction) that is approximately the same as the width dimension of the slat support portion 150E, and more specifically, it has a dimension slightly larger than the width dimension of the slat support portion 150E. In addition, the recess 600 has a dimension in the height direction of the front wall portion 122 and the rear wall portion 123 that is approximately half the height of each wall portion.

[0198] The slat support portion 150E engages with the slat 120 when its outer peripheral edge is engaged with the recess 600 formed on the slat 120 as described above. That is, the slat 120, which is supported on the front roller 130 by the slat support portion 150E, is supported by the slat support portion 150E when its outer peripheral edge is engaged with the recess 600.

[0199] The slat support portion 150E according to this embodiment has an increased outer diameter compared to the slat support portions 150, 150A, etc., according to other embodiments, by an amount corresponding to the amount by which the peripheral portion engages with the recess 600 of the slat 120. Regarding the structure of the slat support portion 150E, as a basic structure other than having a larger outer diameter, for example, the same structure as the slat support portions 150, 150A, and 150D according to the first, second, and fifth embodiments may be appropriately adopted. Furthermore, Figure 21 and Figure 22An example is shown that has the same structure as the slat support portion 150E as the slat support portion 150 in the first embodiment.

[0200] Based on the structure including the slat 120 and slat support portion 150E as described in this embodiment, the slat support portion 150E based on the recess 600, relative to the slat 120, can limit the misalignment of the slat 120 in the left and right directions. Therefore, even if there is a deviation in the amount of stalks taken into the feeding chamber 35, for example, the slat 120 can be suppressed from shifting in the left and right directions. As a result, stable conveying operation based on the conveyor 36 can be obtained, and the conveying performance of the feeding portion 30 for the stalks can be improved.

[0201] Furthermore, in this embodiment, a recess 600 serving as an engaging portion is provided in the slat 120, but the structure of the engaging portion is not limited to this embodiment. For example, a structure may be adopted in which a recess is provided on the slat support portion 150E side, and a protrusion serving as an engaging portion that engages with the recess of the slat support portion 150E is provided on the slat 120 side.

[0202] [Seventh Implementation Method]

[0203] use Figure 23 and Figure 24 The seventh embodiment of the present invention will be described.

[0204] like Figure 23 As shown, the slat support 150F of this embodiment is configured in a spiral shape to apply a conveying action along the roller axis to the stalks. That is, the slat support 150F is configured to convey the stalks (see reference 104) taken from the opening 104 into the feeding chamber 35. Figure 24 The conveying action applied to the machine body in the left and right directions is formed in a spiral shape along the middle outer peripheral surface 130b of the roller body 131, centered on the rotation center line C1. The spiral line along the arrangement of the slat support portion 150F on the middle outer peripheral surface 130b of the roller body 131 is a straight line in the unfolded view of the middle outer peripheral surface 130b.

[0205] The slat support 150F is configured as a continuous spiral line along the roller axial direction and over a substantially entire area excluding the left and right ends of the central outer circumferential section 130b. The slat support 150F sets the direction of the axial conveying action of the roller to the left (…). Figure 23 (Right side of the image). Here, the conveying direction of the slat support 150 is in the forward rotation direction of the conveyor 36 (see reference). Figure 6 The direction of the conveying action is obtained by driving the front roller 130 to rotate counterclockwise in the left view, as indicated by arrow A1).

[0206] The slat support portion 150F according to this embodiment is a plate-shaped portion with the roller axis as the plate thickness direction, and is a spiral portion with its inner diameter matching the outer diameter of the roller body 131. The slat support portion 150F has a constant or substantially constant plate thickness overall. The slat support portion 150F has plate surfaces 756 on both sides in the left-right direction. The slat support portion 150F is configured to be fixedly installed on the front roller 130 and is a portion that rotates integrally with the front roller 130.

[0207] The slat support portion 150F, serving as the contact surface that contacts the slat 120, has an outer peripheral end face 755 that is cylindrical along the same axis as the front roller 130. The outer peripheral end face 755 is the end face of the outer peripheral side of the plate-shaped slat support portion 150F and has a spiral shape formed along the slat support portion 150F. The outer peripheral end face 755 is a spiral surface along a cylindrical surface whose outer diameter is larger than that of the roller body 131 and the cylindrical cover 132.

[0208] The slat support portion 150F is formed in a spiral shape and has ends on both sides along the roller axial direction. That is, the slat support portions 150, 150A, and 150B involved in the above embodiments are all provided in a ring shape, while the slat support portion 150F involved in this embodiment has ends on both sides along the roller axial direction. The spiral plate-shaped member constituting the slat support portion 150F is fixed to the roller body 131 by welding or the like. Furthermore, the method of fixing the spiral plate-shaped member relative to the roller body 131 is not particularly limited.

[0209] Furthermore, in relation to the spiral plate-shaped member constituting the slat support portion 150F, a reinforcing member is appropriately provided to enhance the support strength for the intermediate outer peripheral surface 130b. The reinforcing member is fixed to the spiral plate-shaped member constituting the slat support portion 150F and the reinforcing plate of the intermediate outer peripheral surface 130b, for example, by welding, and is provided at multiple locations at predetermined intervals along the spiral of the slat support portion 150F.

[0210] The slat support portion 150F generally has a constant or substantially constant protrusion height relative to the central outer peripheral surface portion 130b, and is provided at constant or substantially constant intervals. Figure 23 In the example shown, the number of turns of the spiral shape of the slat support 150F is approximately 4.5. However, the number of turns and spacing of the spiral shape of the slat support 150F are not particularly limited.

[0211] The direction of the conveying action based on the spiral shape of the slat support 150F corresponds to the configuration of the feeding section 30 to the left relative to the platform 31. For example... Figure 24As shown, the cutting section 3 has a platform 31 (see reference) disposed on the front side of the feeding section 30 in a manner communicating with the feeding chamber 35 of the feeding section 30 and having a rake auger 37 built into it. Figure 3 The feeding chamber 35 is located on the left side relative to the platform 31, biased towards the left and right sides of the machine body. Regarding this structure, the direction of the conveying action on the stalks based on the spiral slat support 150F is towards the left. Figure 24 (to the right of the middle) direction.

[0212] The spiral shape that applies a conveying action to the stalks in a leftward direction is an inclined spiral shape as shown in the front view of the front roller 130. Figure 23 As shown, for the portion of the slat support 150F located in front of the front roller 130, in the front view, the upper side is positioned on the left side ( Figure 23 (right side of the middle), and make the lower side located on the right side ( Figure 23 (Left side of the image). That is, the spiral shape of the slat support 150F is formed in the main view as an inclined shape that tilts towards the conveying direction relative to the vertical direction.

[0213] Regarding this structure, the front roller 130 rotates counterclockwise in the left view as driven by the conveyor 36, thereby conveying the stalks fed from the platform 31 into the feeding chamber 35 through the opening 104 to the left side by the conveying action of the slat support 150F.

[0214] According to the structure of the slat support portion 150F as described in this embodiment, the spiral shape of the slat support portion 150F allows for contact support of the slat 120 at multiple locations along the roller axial direction, thereby reducing the support pressure on the slat 120. Furthermore, the support position of the slat 120 can be gradually varied along the roller axial direction. This alleviates stress concentration in the support portion of the slat 120 and suppresses wear. As a result, the durability of the slat 120 and the like constituting the conveyor 36 can be improved. In addition, the increased support portion of the slat 120 makes it easier to ensure the area of ​​the support surface, effectively suppressing wear on the support portion of the slat 120 and stably supporting the slat 120.

[0215] Furthermore, since the slat support portion 150F is spirally formed on the outer peripheral end face 755 of the support surface relative to the slat 120, covering the entire circumference of the front roller 130, the supporting effect of the slat support portion 150F on the multiple slats 120 can be kept constant, and the wear of the supporting portion of each slat 120 can be made uniform. Moreover, because the supporting effect of the slats 120 relative to the front roller 130 is constant in the slat support portion 150F, stable conveying operation of the conveyor 36 can be achieved.

[0216] Furthermore, the spiral arrangement of the slat support 150F allows for axial conveying of the straw by the roller. Therefore, by adjusting the conveying direction and conveying volume based on the spiral shape of the slat support 150F, straw retention can be suppressed, and the slats and straw fragments can be prevented from tangling, adhering to, or being wound into the rotating body support shaft 116, the left and right chains 110, etc. (see reference). Figure 5 ).

[0217] Furthermore, regarding the structure in which the feeding chamber 35 is positioned to the left of the center relative to the platform 31, the slat support 150F sets the conveying direction of the spikelets based on its spiral shape to the left. With this structure, even if the amount of spikelets taken from the opening 104 relative to the feeding chamber 35 differs on the left and right sides, the flow rate of spikelets taken into the feeding chamber 35 can be made uniform.

[0218] Specifically, such as Figure 24 As shown, regarding the amount of stalks within platform 31, the left-right dimension is larger relative to the portion of opening 104 on the right (refer to the portion shown by dashed ellipse V1) than relative to the portion of opening 104 on the left (refer to the portion shown by dashed ellipse V2), and correspondingly, the capacity is larger. Therefore, regarding the stalks taken from platform 31 through opening 104 into feeding chamber 35, the amount of stalks taken from the right side of opening 104 (refer to arrow W1) is greater than the amount of stalks taken from the left side of opening 104 (refer to arrow W2), resulting in a deviation in the flow rate of stalks within feeding chamber 35.

[0219] Therefore, according to the structure in this embodiment, where the spiral winding direction of the slat support 150F is set from the side with a larger amount of stalks taken in to the side with a smaller amount, that is, from the right side to the left side, the stalks can be conveyed from the side with a larger amount to the side with a smaller amount in the left-right direction within the feeding chamber 35. This increases the flow rate of stalks on the side with a smaller amount taken in within the feeding chamber 35, thereby reducing the difference in stalk flow rate between the left and right sides within the feeding chamber 35 and making the stalk flow rate more uniform. As a result, it can suppress the stalks and straw fragments from wrapping, adhering to, or getting caught in the rotating body support shaft 116, the left and right chains 110, etc., and achieve smooth stalk conveying from the cutting section 3 to the threshing section 7.

[0220] The above-described embodiments are examples of the present invention, and the present invention is not limited to the above-described embodiments. Therefore, even embodiments other than those described above, as long as they do not depart from the technical concept involved in the present invention, can of course be modified according to design, etc. In addition, the effects described in this disclosure are merely examples and are not limited, and other effects may also be present.

[0221] This technology can take the following structure. Furthermore, the structures described below can be selected and combined arbitrarily.

[0222] (1) A combine harvester comprising a conveying device for conveying and supplying stalks cut by a cutting section to a threshing section, characterized in that,

[0223] The conveying device has:

[0224] A rotating body is positioned in front of the conveying direction of the conveying device;

[0225] A sprocket that rotates integrally with a drive shaft located on the rear side of the conveying direction;

[0226] Left and right chains, which are wound around the rotating body and the sprocket;

[0227] Multiple slats, which are laid between the left and right chains; and

[0228] A slat support portion that supports the slats on the rotating body.

[0229] The slat support portion has:

[0230] The contact portion, which constitutes a contact surface that contacts the slat; and

[0231] A support base that supports the contact portion on the rotating body.

[0232] (2) The combine harvester described in (1) is characterized in that,

[0233] The slat support is provided at multiple locations along the rotation axis of the rotating body.

[0234] (3) The combine harvester according to (1) or (2) is characterized in that,

[0235] The slat support portion has a rotating body shape with the rotation center line of the rotating body as the axis.

[0236] (4) The combine harvester according to (1) or (2) is characterized in that,

[0237] The slat support is configured to be inclined relative to a direction orthogonal to the rotation center line of the rotating body.

[0238] (5) The combine harvester according to (1) or (2) is characterized in that,

[0239] The slat support is inclined so as to exert a conveying action on the stalks inward toward the left and right directions of the machine body.

[0240] (6) The combine harvester according to any one of (1) to (5) is characterized in that the slats are provided with a engaging portion that engages with the slat support portion.

[0241] (7) A combine harvester comprising a conveying device for conveying and supplying stalks cut by a cutting section to a threshing section, characterized in that,

[0242] The conveying device has:

[0243] A rotating body is positioned in front of the conveying direction of the conveying device;

[0244] A sprocket that rotates integrally with a drive shaft located on the rear side of the conveying direction;

[0245] Left and right chains, which are wound around the rotating body and the sprocket;

[0246] Multiple slats, which are laid between the left and right chains; and

[0247] A slat support portion that supports the slats on the rotating body.

[0248] The slat support is configured in a spiral shape to exert a conveying effect on the stalks along the axial direction of the rotating body.

[0249] (8) The combine harvester according to (7) is characterized in that,

[0250] The harvesting section includes a grain harvesting platform that is disposed on the front side of the conveying device in a manner communicating with the housing of the conveying device and has a built-in rake auger.

[0251] The housing is positioned on one side of the machine body, offset from the grain harvesting platform in the left-right direction.

[0252] The direction of the conveying action is toward one side of the left-right direction.

Claims

1. A combine harvester comprising a conveying device for conveying and supplying stalks cut by a cutting section to a threshing section, characterized in that, The conveying device has: A rotating body is positioned in front of the conveying direction of the conveying device; A sprocket that rotates integrally with a drive shaft located on the rear side of the conveying direction; Left and right chains, which are wound around the rotating body and the sprocket; Multiple slats, which are laid between the left and right chains; and A slat support portion that supports the slats on the rotating body. The slat support portion has: The contact portion, which constitutes a contact surface that contacts the slat; and A support base that supports the contact portion on the rotating body.

2. The combine harvester according to claim 1, characterized in that, The slat support is provided at multiple locations along the rotation axis of the rotating body.

3. The combine harvester according to claim 1 or claim 2, characterized in that, The slat support portion has a rotating body shape with the rotation center line of the rotating body as the axis.

4. The combine harvester according to claim 1 or claim 2, characterized in that, The slat support is configured to be inclined relative to a direction orthogonal to the rotation center line of the rotating body.

5. The combine harvester according to claim 1 or claim 2, characterized in that, The slat support is inclined so as to exert a conveying action on the stalks inward toward the left and right directions of the machine body.

6. The combine harvester according to claim 1, characterized in that, The slat is provided with an engaging portion that engages with the slat support portion.

7. A combine harvester comprising a conveying device for conveying and supplying stalks cut by a cutting section to a threshing section, characterized in that, The conveying device has: A rotating body is positioned in front of the conveying direction of the conveying device; A sprocket that rotates integrally with a drive shaft located on the rear side of the conveying direction; Left and right chains, which are wound around the rotating body and the sprocket; Multiple slats are laid between the left and right chains; as well as A slat support portion that supports the slats on the rotating body. The slat support is configured in a spiral shape to exert a conveying effect on the stalks along the axial direction of the rotating body.

8. The combine harvester according to claim 7, characterized in that, The harvesting section includes a grain harvesting platform that is disposed on the front side of the conveying device in a manner communicating with the housing of the conveying device and has a built-in rake auger. The housing is positioned on one side of the machine body, offset from the grain harvesting platform in the left-right direction. The direction of the conveying action is toward one side of the left-right direction.

Images