JP2007075038A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combine harvester whose reaping portion detached from a travel machine frame can easily be maintained, even when a reaping input shaft and a counter shaft are separably composed. <P>SOLUTION: This combine harvester is characterized by fixing a counter case 121 to the chassis of a travel machine frame through a support, transmitting a driving force from an engine disposed on the chassis to a counter shaft 116 disposed in the counter case 121 through a transmission case 124, detachably supporting a reaping input case 20 disposed in a reaping portion on the chassis, transmitting a driving force from the counter shaft 116 to one end of a reaping input shaft 19 disposed in the reaping input case 20 to drive the reaping portion, and disposing a turning tool connection portion 200 for turning the reaping input shaft 19 at the other end of the reaping input shaft 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combine that harvests cereal grains in a field by a reaping unit, transports the cereals to a threshing unit, and threshs.

  The harvesting part of the combine is rotatable by the left and right half bearings on the bearing stand that rises on the front side of the threshing part from the chassis of the traveling machine body, the harvesting input case that incorporates the harvesting input shaft to which the power from the engine is first transmitted The vertical transmission case that is supported in the left-right direction of the machine just before the threshing portion and that is interlocked with the cutting input shaft is built from the outer surface of the cutting input case toward the front obliquely downward direction. An intermediate outer surface of a lateral transmission case that is integrally extended and incorporates a lateral transmission shaft that is interlocked and coupled to the longitudinal transmission shaft is integrally coupled to the tip of the longitudinal transmission case, and supports the lateral transmission case in the left-right direction of the fuselage, The rear end part of a plurality of integral cutting frames corresponding to the number of cutting strips, the rear part of which is integrally connected by a horizontal connecting frame, is integrally connected to the horizontal transmission case, and the cutting frame is directed from the horizontal transmission case to the front of the machine body. It is integrally extended. Further, a weed lifting device, a scraping device, and a cutting blade device corresponding to the number of cutting strips are attached to the mowing frame, and the uncut rice mash in the field is scraped while being raised after weeding. It cuts and cuts the roots of the cereal grains. The harvested cereal rice bran is nipped and conveyed by the chain, and the tip part is also conveyed by locking by the tines and transferred to the conveying start end of the feed chain of the threshing unit. This cutting part can be rotated in the vertical direction around the cutting input case (by a fulcrum) by a hydraulic cylinder stretched between the chassis of the traveling machine body and the vertical transmission case (for example, (See Patent Documents 1 and 2.)

  When a threshing unit is mounted on the left half of the chassis of the traveling aircraft, a grain tank is mounted on the right half of the chassis, and a cab with a driver's seat and a driving operation unit is arranged on the front side of the grain tank. The mowing unit is disposed in front of the threshing unit on the left side of the cab. In such a machine layout, the feed chain is stretched on the left side of the threshing part, the conveyance start end is extended to the left side of the rear part of the cutting part, and the stock base part of the cutting grain is placed on the left side of the rear part of the cutting part. It is designed to be inherited by the conveyance start end. (For example, see Patent Documents 1 and 2.)

  In addition, when the threshing unit is mounted on the right half of the chassis of the traveling machine body, the above-mentioned machine layout is reversed left and right, and the stock base part of the harvested cereal basket is the feed chain conveyance start end on the rear right side of the harvesting part. Inherited.

  By the way, in the conventional harvesting part of the combine, the end on the driver's seat side of the harvesting input shaft incorporated in the harvesting input case serving as the vertical pivot (the end opposite to the end on the feed chain side, that is, the machine body) The outer edge of the fuselage, opposite the outer edge, protrudes from the cutting input case, and a large-diameter input pulley is provided at the protruding edge of the cutting input shaft. Power was transmitted by belt transmission (see, for example, Patent Documents 1, 2, and 3).

  Further, there are two transmission paths to the cutting input shaft, and one of the two transmission paths is connected to one of the transmission paths and the other transmission path is disconnected to drive the cutting unit. Is to transmit the power from the engine to the end of the cutting input shaft on the driver's seat side through the continuously variable transmission for traveling in order to change the driving speed of the cutting part in synchronization with the vehicle speed (traveling speed). When normal mowing work, the mowing part is driven with the power from this transmission path, and the other power transmission path is used when performing pouring work to send the cereals in the mowing part to the threshing part at the end of mowing When performing corner cutting work on a farm or in a field, there is a fallen culm in a part of the uncut part of the field, and when cutting that part at a low vehicle speed, the cutting part is not synchronized with the vehicle speed. From the transmission system to the threshing section to drive the Is intended to transmit power to the unit (for example, see Patent Document 3.).

As described above, the harvesting input case in which the harvesting input shaft is incorporated is rotatably supported by the left and right half bearings on the bearing stand that rises from the chassis of the traveling machine body to the front side of the threshing part. Remove the bolt that is tightening the other half of the bearing cover from the half of the bearing body that is mounted on the bearing stand side of the half bearing, and attach it to the input pulley provided at the driver side end of the cutting input shaft By removing the hanging transmission belt and pulling out the connecting pin that connects the tip of the piston rod of the hydraulic cylinder to the vertical transmission case, the cutting part can be removed from the traveling machine body (for example, (See Patent Document 2).
JP-A-10-295148 JP 2002-95336 A JP 2001-178246 A

  In such a conventional combine, when the cutting part is removed from the traveling machine body and the cutting part is attached again to the traveling machine body, the transmission belt must be removed from the input pulley and the transmission belt must be hung around the input pulley again. It took a lot of work to remove and install the parts. In view of this, a combine has been developed in which the cutting input shaft and the input pulley can be separated, and the cutting unit can be removed from the traveling machine body without removing the transmission belt from the input pulley.

  However, in the cutting part, it is necessary to manually drive the cutting input shaft in order to perform maintenance of the weeding raising device, the scraping device or the cutting blade device provided in the cutting unit after being removed from the traveling machine body. However, when the input pulley is externally fitted and the counter shaft and the cutting input shaft can be separated, it is difficult to manually drive the cutting input shaft.

  The present invention has been made in view of such circumstances, and even when the cutting input shaft and the counter shaft are configured to be separable, maintenance of the cutting unit removed from the traveling machine body is easily performed. It is to provide a combine that can.

  According to the first aspect of the present invention, a counter case is fixed to a chassis of a traveling machine body via a support portion, and a driving force from an engine provided in the chassis is applied to a counter shaft inserted in the counter case. The cylindrical cutting input case provided in the cutting unit is detachably supported by the chassis, and the driving force is transmitted from the counter shaft to one end of the cutting input shaft inserted into the cutting input case. While the cutting unit is driven, a rotating tool connecting unit for rotating the cutting input shaft is provided at the other end of the cutting input shaft.

  According to a second aspect of the present invention, the turning tool connecting portion includes a screwing leg portion extending in the axial length direction of the cutting input shaft, and a screwing member screwed to the screwing leg portion. The screwing leg portion and the screwing member are configured to rotate in a direction in which the screwing member is loosened when a force is applied to the screwing member in a direction to reverse the cutting input shaft. It is characterized by.

  The present invention described in claim 3 is characterized in that the rotating tool connecting portion is positioned in the cutting input case.

  In the first aspect of the present invention, the counter case is fixed to the chassis of the traveling machine body via the support, and the driving force from the engine provided in the chassis is applied to the counter shaft inserted in the counter case. It is transmitted by a belt hung around the counter shaft, and the cylindrical cutting input case of the cutting unit is detachably supported by the chassis, and one end of the cutting input shaft inserted into the cutting input case is Since the driving force is transmitted from the counter shaft to drive the cutting unit, the cutting unit can be detached from the chassis by detaching the cutting input case from the chassis. In this case, the belt is removed from the counter shaft. Can be done without.

  At this time, since the rotation tool connecting portion for rotating the cutting input shaft is provided at the other end of the cutting input shaft, the user can rotate the tool connecting portion even when the cutting portion is removed from the chassis. The rotary input shaft can be rotated by connecting the rotary tool to the rotary tool and rotating the rotary tool. Therefore, the maintenance of the cutting part removed from the chassis of the traveling machine body can be easily performed. .

  According to the second aspect of the present invention, the turning tool connecting portion includes a screwing leg portion extending in the axial length direction of the cutting input shaft, and a screwing member screwed to the screwing leg portion. It is configured. As described above, since the turning tool connecting portion is formed at the end of the cutting input shaft with a simple configuration, an increase in cost required for the turning tool connecting portion can be suppressed as much as possible.

  In addition, the screwing leg and the screwing member are configured to rotate in a direction in which the screwing member is loosened when a force in a direction to reversely move the cutting input shaft is applied to the screwing member. The rotating tool connected to the tool connecting portion prevents the cutting input shaft from moving backward and prevents the cutting portion from being damaged.

  According to the third aspect of the present invention, since the turning tool connecting portion is positioned in the cutting input case, it does not protrude from the cutting input case, and the turning tool connecting portion is attached when the cutting portion is attached / detached and when the cutting portion is cut. The connecting portion does not get in the way, and troubles such as the rotating tool connecting portion being caught by something are prevented, and the safety is high.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view of the combine. FIG. 2 is an overall plan view of the combine. In FIG. 1, 1 is a track frame on which a left and right traveling crawler 2 is installed, 3 is a chassis installed on the track frame 1, and 4 is a feed chain. A threshing unit 5 is stretched on the left side and a handling cylinder 6 is built in, 7 is a 6-line mowing unit provided in front of the threshing unit 4, and 8 is a slaughter processing unit that faces the end of the sewage chain 9. Is a grain tank that carries the grain from the threshing unit 4 through the milling cylinder 11, 12 is a discharge auger that discharges the grain of the grain tank 10 to the outside of the machine, 13 is a driving operation unit 14 such as a steering handle, and driving A driving cabin 16 provided with a seat 15 is an engine provided below the driving cabin 13, and is configured to continuously harvest cereals with the reaping unit 7 and thresh with the threshing unit 4 while traveling and moving in the field.

  The chassis 3 on which a pair of left and right traveling crawlers 2 are mounted on the lower side is equipped with a threshing portion 4 on the left half and a grain tank 10 on the right half, and a steering handle or the like is operated on the front side of the grain tank 10. A driving cabin 13 having an operation unit 14 and a driver's seat 15 is arranged to constitute a traveling machine body of a combine, and is cut to the left side of the front part of the traveling machine body that is in front of the threshing part 4 on the left side of the driving cabin 13. A portion 7 is provided. The engine 16 is mounted below the driving cabin 13 on the right side of the front part of the traveling machine body.

  As shown in FIGS. 3 and 4, a bearing stand 17 is raised from the front end of the chassis 3 to the front side of the threshing portion 4, and left and right half bearings 18 </ b> L and 18 </ b> R are provided on the upper surface of the bearing stand 17. A cutting input case 20, which is a shaft tube with a built-in cutting input shaft 19 that transmits power from the cutting, is provided in the cutting unit 7, and both ends of the cutting input case 20 are rotated to the bearing stand 17 by the left and right half bearings 18L and 18R. The cutting input case 20 is horizontally supported horizontally in the left-right direction of the machine body on the front side of the threshing portion 4. Also, a longitudinal transmission case 21 integrally extending from the outer surface of the cutting input case 20 toward the front obliquely downward direction, and an intermediate portion outer surface is integrally connected to the distal end of the longitudinal transmission case 21, and the left and right direction of the body at the distal end of the longitudinal transmission case 21. Are provided with a horizontal transmission case 22 that is horizontally supported horizontally, and a six-piece cutting frame 24 integrally connected to the rear portion by a horizontal connection frame 23, and the rear portion of the cutting frame 24 is integrally connected to the horizontal transmission case 22. Then, the cutting frame 24 is integrally extended in parallel from the horizontal transmission case 22 toward the front of the machine body, and the integrated cutting input shaft 20, vertical transmission case 21, horizontal transmission case 22, and cutting frame 24 are connected to the main part of the cutting unit 7. A cutting frame 7 is constructed by assembling components of the cutting unit 7 described later on the main frame, and the hydraulic cylinder 2 is interposed between the chassis 3 and the vertical transmission case 21. It was stretched, (fulcrum) around the input case 20 reaper the reaper 7 by extending and retracting the hydraulic cylinder 25 is configured so as to rotate in the vertical direction.

  The 6-cut mowing section 7 separates the cereals to be harvested and the uncut cereals and separates the cereals to be harvested for every 6 strips, A pre-processing mechanism comprising six pulling cases 29 having six pulling tines 28 for raising the cereal grains, and two pulling right cereal grains introduced from between the two right pulling cases 29 The right star wheel 30R, which is a pair of left and right pairs, and a pair of left and right pairs of right protrusions 31R, which is a pair of right protrusions, and a left side 2 The left star wheel 30L, which is a pair of left and right left-handed wheels that rakes the stock base portion of the left-side two cereal grains introduced from between the two pulling cases 29 into one bundle. A pair of left and right left belt 31L, which is a pair of left protrusions, and a central two pulling cases 29 are introduced. The center star wheel 30C, which is a pair of left and right pairs, and a pair of left and right pairs of central projections, which are scraped and scraped into a bundle of the grain roots of the middle two cereals after pulling up A central mechanism belt 31C as a belt, a cutting device including a clipper-shaped cutting blade 32 that simultaneously cuts six stocks of cereal at the time of scraping, a pair of right star foil 30R and right Right stock merging and transporting chain 33R that holds and transports the stock portion of the harvested cereal rice cake for the two right-hand stalks that have been scraped by the scraping belt 31R, and a pair of left star foil 30L and left rake Left stock merging and transporting chain that clamps and conveys the stock of the left two chopped cereals that have been scraped by the belt 31L to the upper side after the right slant and joins the transport end of the right stock merging and transporting chain 33R 33L and a set of central star foil 30C and central scraper The root part of the harvested cereal rice cake of the middle two strips scraped by the belt 31C is sandwiched and conveyed upward after the right slant, and the stock base part of the two cropped grains of the left side of the right stock former merge transport chain 33R Central stock former confluence conveyance chain 33C that joins before the merge section of No. 6 and the stock base part of the harvested cereal rice cake for 6 rows merged by the left and right and central stock origin confluence conveyance chains 33R, 33L, 33C A stock transport chain 34 that is a vertical transport chain that is inherited from the transport end portion of the confluence transport chain 33R and is held and transported to the upper left after obliquely skewing to the transport start end portion of the feed chain 5, and a stock transport chain 34 The cereal stock former transport mechanism comprising auxiliary stock former transport chains 35 and 36 that carry and inherit the stock base portion of the harvested cereals for six strips in an appropriate posture from the transport end portion of the feed chain 5 to the feed start end of the feed chain 5; Stocked by right stock former conveyance chain 33R The left side 2 pinching and transporting the stock part by the right tip transporting tine 37R that latches and transports the head part of the harvested cereal portion for the two right-hand sections that sandwich and transport the base part, and the left stock former confluence transport chain 33L The tip of the left-handed tip tine 37L, which holds and transports the tip of the cut portion of the harvested cereal grain, and the tip portion of the cut portion of the central two-row portion that is transported by holding the stock portion by the central stock former conveying chain 33C. Locking and transporting the tip part of the six cropped cereal grains that are holding and transporting the base part by the central tip transporting tine 37C, the stock transporting chain 34, and the auxiliary stock transporting chains 35 and 36 to be transported. The tip part of the cereal grain for the two right-hand ridges after being introduced from between the rear-tip transfer tine 38 and the two right-hand pulling cases 29 is positioned further above the transfer start end of the right-tip transfer tine 37R. Lock and convey on the opposite side of the tip conveyance tine 37R The upper tip transfer tine 39R and the tip of the left two cereal grains introduced from between the two pulling cases 29 on the left are transferred to the left tip further above the transfer start end of the left tip transfer tine 37L. The upper left tip conveying tine 39L that is locked and conveyed on the opposite side of the tine 37L, and the center of the two cereal grain tips introduced from between the two erection cases 29 in the center, the central tip portion conveying tine 37C Further on the opposite side of the central tip transport tine 37C, and on the left side of the threshing portion 4 The cedar harvested by the mowing unit 7 is transferred and inherited to the conveyance start end of the feed chain 5 extending to the left outer side of the rear part of the mowing unit 7 on the left side of the mowing input case 20. Yes.

  As shown in FIG. 5, a longitudinal transmission shaft 40 is provided in the longitudinal transmission case 21, in which the upper end of the cutting input shaft 19 built in the harvesting input case 20 is interlocked and connected via a bevel gear. A horizontal transmission shaft 41 that interlocks and connects an intermediate portion to the lower end of 40 via a bevel gear is built in the horizontal transmission case 22, and is driven from the vertical transmission shaft 40 and the horizontal transmission shaft 41 among the components of the cutting unit 7. Power is taken out, and the vertical transmission case 42 is raised from the left end portion of the horizontal transmission case 22 toward the upper position of the induction case 29 in a side view in a forward leaning posture, and rightward from the upper end portion of the vertical transmission case 42 The pulling lateral transmission case 43 extends horizontally in the direction, the pulling drive case 44 for each pulling case 29 extends downward from the pulling lateral transmission case 43, and the lower part of each pulling drive case 44 is connected to each pulling case. A tine chain which faces the upper back side of the traction shaft 29, protrudes the traction drive shaft 45 from the lower end of each traction drive case 44 to the inner upper portion of each traction case 29, and attaches the traction tine 28 to the protruding end portion at equal intervals. An elevating tine drive sprocket 46 that winds and supports the upper part of the elevating vertical transmission shaft 47, the elongating vertical transmission shaft 47 is built in the elongating vertical transmission case 42, and the lower end thereof is linked to the left end of the horizontal transmission shaft 41 via a bevel gear; A pulling lateral transmission shaft 48 that is built in the case 43 and interlocked and connected to the upper end of the pulling vertical transmission shaft 47 via a bevel gear, and a bevel gear that is built in each pulling drive case 44 and that has an upper end on the pulling horizontal transmission shaft 48. And the pulling drive shaft 49, the lower part of which is linked to the pulling tine drive shaft 45 via a bevel gear. The traction drive case 51 is configured to transmit power to the traction drive sprocket 46 of the gear 29, and the traction transmission case 51 containing the traction transmission mechanism 50 is interposed on the upper part of the traction vertical transmission case 42. The pulling speed change mechanism 50 is incorporated, and the driving speed of the pulling tine 28 of each pulling case 29 is changed to high speed, medium speed, and low speed.

  The cutting blade 32 divides the movable blade at the central portion of the cutting width and reciprocates the left and right movable blades 32 in opposite directions to cancel vibrations. The cutting blade 32 is slightly smaller than the left end portion of the lateral transmission shaft 41. The crankshaft 52a, which is the left cutting blade drive shaft, is raised upward from the inside via the bevel gear, and the crankshaft 52b, which is the right cutting blade drive shaft, is directed upward from the right end portion of the lateral transmission shaft 41 via the bevel gear. The left and right crankshafts 52a and 52b are protruded upward from the lateral transmission case 22 so that the power of the left and right movable blades 32 can be taken out from the lateral transmission shaft 41.

  Of the transfer chains and transfer tines that constitute the grain haul transfer mechanism, the power of the auxiliary stock former transfer chains 35, 36 and the rear tip transfer tine 38 is taken out from the upper part of the vertical transmission shaft 40. A rear conveyance drive case 53 extends leftward from the upper part of the 21 and is provided in the rear conveyance drive case 53 so that the right end thereof is linked to the upper part of the vertical transmission shaft 40 via a bevel gear. Of the auxiliary transfer chain 36 and the rear end of the tine chain for attaching and supporting the trailing end of the tine chain to which the rear end tip tine 38 is mounted at equal intervals. The left end of the shaft 54 is interlocked and connected via a bevel gear, and the drive sprocket 55 of one auxiliary transport chain 36 is connected to the upper portion of the vertical transmission shaft 40. A driving sprocket 59 of the other auxiliary transfer chain 35 is provided on the driven sprocket shaft 58 of the one auxiliary transfer chain 36, and power is transmitted to the tip transfer tine drive sprocket 56. It is configured to communicate.

  Also, the power of the stock transport chain 34, the right stock transport chain 33R, and the right tip transport tine 37R is taken out from the middle part of the vertical transmission shaft 40, and from the middle part of the vertical transmission case 21 to the right stock transport chain 33R. The right conveyance drive case 60 is raised at a right angle to the rotation plane, and the vertical conveyance drive case 61 is extended from the lower portion of the right conveyance drive case 60 to the upper left oblique direction, and is incorporated in the right conveyance drive case 60. The right conveying drive shaft 62 that interlocks and connects the lower end to the middle portion of the vertical transmission shaft 40 via a bevel gear, and the lower end that interlocks and connects to the lower portion of the right conveying drive shaft 62 via the bevel gear. The vertical stock transmission shaft 63 is provided, and the right stock transport chain drive sprocket 64 and the right tip transport tine 37R are mounted at equal intervals to wind and support the transport end of the right stock transport chain 33R. A right tip transfer tine drive sprocket 65 for winding and supporting the transfer terminal end of the tine chain is provided on the right transfer drive shaft 62, and a lower end thereof is connected to the vertical transfer drive shaft 63 via a bevel gear. A stock transport chain drive sprocket 67 that winds and supports the transport start end of the stock transport chain 34 is provided, and a right stock transport chain drive sprocket 64 and a right tip transport tine drive sprocket 65 are provided from an intermediate portion of the vertical transmission shaft 40. It is configured to transmit power to the stock transport chain drive sprocket 67.

  Further, the power of the left stock former transfer chain 33L and the left tip transfer tine 37L is taken out from the left end portion of the horizontal transmission shaft 41 via the pulling vertical transmission shaft 47, rightward from the middle portion of the pulling vertical transmission case 42, and A left conveyance drive case 68 extends in parallel with the rotation plane of the left stock former conveyance chain 33L, and is built in the left conveyance drive case 68, and the left end is interlocked and connected to an intermediate portion of the vertical vertical transmission shaft 47 via a bevel gear. Non-conveying side middle of the tine chain provided with a left conveying drive shaft 69 and mounting the left stock source conveying chain drive sprocket 70 for winding and supporting the non-conveying side intermediate part of the left stock former conveying chain 33L and the left tip conveying tine 37L at equal intervals The right end of the left transport drive shaft 69 is interlocked and connected via a bevel gear to an intermediate portion of a drive sprocket shaft 72 provided with a left tip transport tine drive sprocket 71 for winding and supporting the portion. It is configured so as to transmit the power from the left end of the horizontal transmission shaft 41 to the left stock based transport chain drive sprocket 70 and the left fore conveying tines drive sprocket 71.

  Further, the power of the central stock transport chain 33C and the central tip transport tine 37C is taken out from the intermediate part of the lateral transmission shaft 41, and from the intermediate part of the lateral transmission case 22 to the rotation plane of the central stock transport chain 33C. The central transport drive case 73 is raised at a right angle, and parallel to the rotation plane of the central stock transport chain 33C from the upper end of the central transport drive case 73 to the rear end of the central stock transport chain 33C toward the transport end. A front part that extends the transmission case 74, is built in the central conveyance drive case 73, has its lower end linked to the middle part of the lateral transmission shaft 41 via a bevel gear, and has its upper end inserted inside the front part of the transmission case 74 The central stock drive chain 75 and the lower end of the central stock transport chain 74 are inserted into the rear inner side of the transmission case 74 from the rear portion of the transmission case 74 toward the transport end of the central stock transport chain 33C. A central stock transport chain drive sprocket 77 and a central tip transport tine that are provided with a rear central transport drive shaft 76 that rises at right angles to the rotation plane of 3C and that supports the transport end portion of the central stock transport chain 33C. A central tip transport tine drive sprocket 78 that winds and supports the transport terminal end of the tine chain that attaches 37C at equal intervals is provided on the rear central transport drive shaft 76 and is inserted into the front inside of the transmission case 74. An output sprocket 79 provided at the upper end of the shaft 75, an input sprocket 80 provided at the lower end of the rear central transport drive shaft 76 inserted into the rear inner side of the transmission case 74, and the front central transport drive shaft 75 via the sprockets 79, 80. A transmission chain 81 which is stretched between the upper end of the rear shaft and the lower end of the rear central transport drive shaft 76 and interlocks the two shafts 75 and 76; , Incorporated in the transmission case 74 constitutes an intermediate portion of the horizontal transmission shaft 41 so as to transmit power to the central lines based transport chain drive sprocket 77 and the central tip conveying tines drive sprocket 78.

  The left and right star wheels 30L, 30R, and 30C in the left and right and center groups are integrally attached to the lower ends of the left and right rotating shafts 82, which are two parallel axes, respectively, and the same set of left and right star wheels 30L, 30R, The left and right scratch belts 31L, 31R, and 31C of the left and right and center sets are wound and supported by a large-diameter pulley 83 that is integrally attached to the upper ends of the left and right rotating shafts 82. In the same manner, the conveyance start end portion is wound and supported on a small-diameter pulley 84 that is pivotally supported in front of the large-diameter pulley 83, and the left and right scraping belts 31L, 31R, and 31C of the same set are opened widely toward the front. The star wheels 30L, 30R, and 30C attached to the rotary shaft 82 and the scraping belt 31L, by driving and rotating by transmitting power to one of the left and right rotary shafts 82, 1R and 31C are driven to rotate, the star wheels 30L, 30R, and 30C attached to the other rotary shaft 82 and the take-up belts 31L, 31R, and 31C are driven to rotate, and the left star wheels 30L, 30R, and 30C of the same set are rotated. The left and right star wheels 30L, 30R, and 30C and the right and left belt wheels 31L, 31R, and 31C are rotated in the opposite directions to scrape the cereals. Of the right star wheel 30R and the right take-up belt 31R in the middle of the right rotating shaft 82 to which the right star wheel 30R and the right take-up belt 31R are attached. The driven sprocket 85R that winds and supports the part is supported on the engagement shaft, and a pair of right star wheel 30R and right take-up belt 31R are joined together on the right stock. The left rotation shaft 82 for mounting the left star wheel 30L and the left take-in belt 31L out of a pair of left star wheel 30L and the left take-in belt 31L in a pair of left and right is linked and connected to the feed chain 33R. The driven sprocket 85L that winds and supports the conveyance start end of the left stock former merging and conveying chain 33L is supported on the middle of the engagement shaft, and a pair of left star wheel 30L and left rake belt 31L are left and right. A left rotation shaft for attaching the left star wheel 30C and the scoring belt 31C of the pair of left and right center star wheels 30C and 31C to be driven to rotate in conjunction with the former merging and conveying chain 33L. A driven sprocket 85C that winds and supports the conveyance start end portion of the central stock merger conveyance chain 33C is supported on the intermediate portion of the 82 by an engagement shaft, and a pair of left and right central star sets are provided. The wheel 30C and the central take-up belt 31C are connected to the central stock merger and transfer chain 33C and are driven to rotate.

  Power is transmitted to the right stock former transport chain 33R and the right head transport tine 37R, the left stock transport chain 33L and the left head transport tine 37L, and the central stock transport chain 33C and the central tip transport tine 37C, respectively. Are driven independently, and the right star wheel 30R and the right take-up belt 31R, the left star wheel 30L and the left take-up belt 31L, and the central star wheel 30C and the center take-up belt 31C are driven independently. .

  Further, each tine case 86 of each upper tip transport tine 39L, 39R, 39C is provided with an upper tip transport drive case 87 for attaching it to the output end, and the input end of the drive case 87 of the left upper tip transport tine 39L. Is attached to the lower end of the pulling drive case 44 of the second pulling case 29 from the left, and the upper left tip transport tine 39L is mounted and supported on the upper rear side of the second pulling case 29 from the left, and the upper right tip transport tine 39R. The input end portion of the drive case 87 is attached to the lower end portion of the pulling drive case 44 of the second pulling case 29 from the right, and the upper right tip conveying tine 39R is mounted and supported on the upper rear side of the pulling case 29 second from the right Then, the input end of the drive case 87 of the central upper tip conveying tine 39C is attached to the lower end of the pulling drive case 44 of the third pulling case 29 from the right, and 3 from the right. A center upper tip conveying tine 39C is mounted and supported on the upper rear side of the pulling case 29 of the eye, and a transmission shaft 88 linked to the lower end of the pulling drive shaft 49 via a shaft coupling, and a bevel gear is attached to the transmission shaft 88. The upper tip conveying tine drive shaft 89 that is interlocked and connected to each other is built in each drive case 87, and the upper tip conveying tine drive shaft 89 protrudes from the output end of the drive case 87 to the inside of the tine case 86, and its protruding end Further, a rotating plate for attaching the upper tip conveying tines 39L, 39R, and 39C at equal intervals is attached, and the upper and lower upper tip conveying tines 39L, 39R, and 39C are respectively driven to rotate.

  Then, as shown in FIG. 5, a working transmission case 90 is mounted on the chassis 3 immediately before the threshing section 4, and the threshing clutch is driven by belt transmission from one end of the output shaft 91 protruding from the rear surface of the vertically installed engine 16. A main input shaft 93 which is a cylinder drive shaft that transmits power directly and freely through a threshing clutch lever 92 ("ON" and "OFF" are operated by a threshing clutch lever disposed in the operation control unit 14). And a sub input shaft 95, which is a trimming tuned input shaft that indirectly transmits power from the other end of the output shaft 91 protruding from the front surface of the vertically installed engine 16 via the traveling transmission 94, a work transmission case 90. Provided.

  The traveling transmission device 94 has a built-in mechanical transmission mechanism that is switched to a low speed operation mode (low speed), a standard operation mode (medium speed), and a road traveling mode (high speed) by an auxiliary transmission lever disposed in the driving operation unit 14. At the same time, the main speed change lever disposed in the driving operation section 14 is operated at the input part of the mechanical speed change mechanism, and the forward / stop / reverse movement of the fuselage and the vehicle speed are selected from “0” by the sub speed change lever. A hydraulic continuously variable transmission mechanism (HST) for changing between the highest speeds for each mode is assembled, and the power from the engine 16 is freely adjustable at the other end of the output shaft 91 protruding from the front surface. It is transmitted to the input shaft 97 of the traveling transmission 94 connected through the shaft coupling 96, and the power is transmitted to the left and right axles 98 via the hydraulic continuously variable transmission mechanism and mechanical transmission mechanism of the traveling transmission 94 to travel left and right. Crawler And a PTO shaft 99 for taking out the power for driving the cutting unit 7 from a mechanical transmission mechanism built in the traveling transmission device 94 is provided in the traveling transmission device 94, and the working transmission case 90 is provided from the PTO shaft 99. Power is transmitted to the sub input shaft 95 by belt transmission.

  The working transmission case 90 has power from the engine 16 transmitted to one end of the main input shaft 93 projecting to the rear surface from the other end of the main input shaft 93 projecting to the front surface of the working transmission case 90. Transmission to the handling cylinder 6 and the like, and transmission to the feed chain drive shaft 100 and the sorting drive shaft 101 projecting at one end from the left side surface of the work transmission case 90, driving each part of the threshing unit 4, and the feed chain drive A cutting drive shaft 102 that protrudes from the left side surface of the working transmission case 90 together with the shaft 100 and the sorting driving shaft 101 to the feed chain side (leftward) is provided. The cutting drive shaft 102 has a right side surface of the working transmission case 90. The power from the engine 16 that has passed through the traveling transmission device 94 transmitted to one end of the auxiliary input shaft 95 and the rear surface of the work transmission case 90 are projected. The power from the engine 16 transmitted to one end of the main input shaft 93 is alternatively transmitted, and the threshing portion on one side where the feed chain 5 is stretched between the threshing portion 4 and the cutting portion 7 is transmitted. The power of the cutting unit 7 is taken out from one side of the traveling machine body (left rear position of the cutting unit 7), and the feed of the cutting input shaft 19 built in the cutting input case 20 of the cutting unit 7 from the end of the cutting drive shaft 102 is fed. Power is transmitted to the end portion (left end portion) on the chain side, and among the constituent elements of the cutting unit 7, the one to be driven is configured to be driven.

  Here, even if the load of the traveling unit (traveling crawler 2) or the threshing unit 4 changes, the threshing is controlled by the automatic constant rotation control function that controls the fuel injection amount of the engine 16 and keeps the rotation speed of the engine 16 constant. The portion 4 is configured to be driven at a constant speed, and the main input shaft 93 and the reaping drive shaft 102 feed the cereals in the reaping portion 7 to the threshing portion 4 at the end of the mowing at the heel. When performing a work or performing a corner cutting operation on a farm field, there is an overturned culm in a part of the uncut part of the farm field, and when the part is cut at a low vehicle speed, the driving operation unit 14 is operated by the operator. Is connected only when the specific operating member disposed in the vehicle is operated and the vehicle speed during the manual operation is equal to or lower than a preset value (for example, 1 m / s), and the cutting unit 7 is synchronized with the vehicle speed. Drive at a constant speed, but otherwise normal reaping At the time of business, the mowing unit 7 is synchronized with the vehicle speed by the power transmitted to the mowing drive shaft 102 only when the vehicle is traveling forward from the auxiliary input shaft 95 via the one-way clutch. It is configured to drive so as to change.

  As shown in FIG. 6 and FIG. 7, the bearing stand 17 includes left and right side frames 103 having a side-view trapezoidal shape that is erected and fixed to the front side of the threshing portion 4 from the front end of the chassis 3, and the left and right sides thereof. A horizontal pipe frame 104 having a rectangular cross section fixed horizontally between the upper ends of the frame 103, which is formed in a front portal shape on a side-view trapezoidal shape, and a chassis 3 between the bearing stand 17 and the threshing portion 4. The working transmission case 90 is mounted on the upper side, and the working transmission case 90 is arranged in an excess space between the bearing stand 17 and the threshing portion 4.

  The left and right half bearings 18L for rotatably bearing both ends of the cutting input case 20 on the bearing stand 17 in order to rotate the cutting portion 7 in the vertical direction about the cutting input case 20 (about a fulcrum). As shown in FIGS. 6 to 9, 18R is composed of a semicircular bearing body 105 attached to the bearing base 17 and a semicircular bearing lid 106 detachably attached to the bearing body 105. Of the bearings 18 </ b> L and 18 </ b> R, the end of the cutting input case 20 on the feed chain side (the end of the power transmission side to the cutting input shaft 19) and the end on the driver side, that is, the machine of the cutting input case 20. One (right side) half bearing 18R that bears one end (right side) of the inner side is a fulcrum flange that is integrally formed at the rear end of the bearing lid 106 with a fulcrum flange 107 that is integrally formed at the rear end of the bearing body 105. 108 as fulcrum The bearing cover 106 is pivotally connected via a bolt 109, which is a shaft, and is formed into a clamp structure in which the bearing cover 106 is attached to the bearing body 105 so as to be openable and closable. The bearing cover 106 is closed and integrally formed at the front end of the bearing body 105. The fastening flange 107 and the fastening flange 108 formed integrally with the front end of the bearing lid 106 are joined together, the bearing body 105 and the bearing lid 106 are joined into one circular shape, and the bearing body 105 and the front end of the bearing lid 106 are joined together. By tightening the opposing flanges 107 and 108 with bolts 109, the bearing body 105 and the bearing lid 106 are joined and connected in a circular shape, and the cutting input case 20 is rotatably supported around this axis, while the cutting input case 20 on the feed chain side (end on the power transmission side to the cutting input shaft 19), that is, on the one side (left side) of the cutting input case 20 outside the machine. The half bearing 18L on one side (left side) that bears the bearing part is joined to a fastening flange 107 that is integrally formed at both ends of the bearing body 105 and a fastening flange 108 that is integrally formed at both ends of the bearing lid 106. The bearing body 106 and the bearing cover 106 are joined in a circular shape, and the flanges 107 and 108 facing each other are fastened with bolts 109 to join and connect the bearing body 105 and the bearing cover 106 in a circular shape. The bearing is rotatably supported around the core wire. Of the left and right half bearings 18L and 18R, the feed chain side end of the cutting input case 20 (the end on the power transmission side to the cutting input shaft 19) and the opposite side thereof. One (right side) half bearing 18R that bears the end on the driver's seat side, that is, one end (right side) inside the cutting input case 20, is the bearing body 105, The lower end of the bearing mounting seat 110, which is horizontally fixed to the one upper end (upper right end) of the horizontal pipe frame 104, which is the upper one end (upper right end) of the cradle 17, is detachably tightened with a bolt. It is integrally formed at the upper end of the bearing leg 111 to be fixed, and is fixedly attached to one end portion (upper right side end portion) of the upper surface of the bearing stand 17, while the end portion (the cutting input shaft 19) of the cutting input case 20 on the feed chain side. End portion on the power transmission side), that is, one end portion (left side) end portion of the cutting input case 20 on the outer side of the machine (left side) is a half bearing 18L. Vertically fitted rotatably to a boss 112 that is vertically fixed (perpendicularly) to one side end (left side end) of the horizontal pipe frame 104 that is one side end (upper left side) of the top surface of The shaft 113 and the upper end surface of the boss 112 are contacted from above. A circular rotary seat 114 to be contacted is integrally formed at the upper end of a bearing leg 115 integrally formed at the lower portion, and the vertical axis 113 is centered (on a fulcrum) at one end of the upper surface of the bearing base 17 (upper left end). The bolt 109, which is rotatably mounted, tightens the bearing lid 106 to the bearing body 105 of the left half bearing 18L, is removed, the bearing lid 106 of the left half bearing 18L is removed, the bearing body 105 is opened, and the right The bolt 109 that fastens the bearing lid 106 to the bearing body 105 of the half bearing 18R is removed, and the bearing lid 106 of the right half bearing 18R is opened to open the bearing body 105, so that the cutting unit 7 is driven. Operation is possible on the opposite side of the feed chain side end of the cutting input case 20 (end on the power transmission side to the cutting input shaft 19) of the left and right half bearings 18L, 18R. Remove the bolt 109 that fastens the bearing lid 106 to the bearing body 105 of the half bearing 18R on one side (right side) that bears the side end, that is, one end (right side) end of the cutting input case 20 inside the machine. The bearing cover 106 of the right half bearing 18R is opened to open the bearing body 105, and the feed chain side end of the cutting input case 20 (the power transmission side end to the cutting input shaft 19), that is, the cutting. By setting only one end (left side) end of the input case 20 on the outside of the machine, the mowing unit 7 can be placed in front of the threshing unit 4 in front of the threshing unit 4 on the left side of the driver's seat 15. From the mounting position on the left side of the unit, the vertical shaft 113 can be pivoted about the vertical shaft 113 (on the fulcrum) between the open position on the outside of the machine on the opposite side of the driver's seat 15 and the original mounting position (the cutting unit 7 is Side opening is possible), cut the mowing part 7 to the left of the driver's seat 15 It is configured to be mounted supported on the front left side of the traveling machine body comprising a front threshing section 4 on one side. As described above, maintenance of the cutting unit 7, the engine unit 16 on the traveling unit side, the traveling transmission unit 94 unit, the working transmission case 90 unit, etc., with the cutting unit 7 removed from the traveling unit body or side opened. And so on.

  In the left and right half bearings 18L and 18R, when the respective bearing bodies 105 are opened, the semicircular bearing surface 105a of the bearing body 105 is opened obliquely upward and the bearing lid 106 is removed or opened. In such a state, the cutting body 7 can be supported by the bearing body 105, and the cutting input case 20 can be put on and removed from the front of the bearing body 105 when the cutting section 7 is removed from the traveling machine body or when the side opening is performed. It is divided in half by one plane (split plane) inclined backward.

   As shown in FIGS. 6 to 15, the power from the engine 16 is transmitted to the end portion on the feed chain side of the cutting input shaft 19 built in the cutting input case 20 which is a shaft tube serving as a vertical fulcrum of the cutting unit 7. In the vicinity of the end of the cutting input shaft 19 on the feed chain side, a counter shaft 116 parallel to the cutting drive shaft 102 and the cutting input shaft 19 is provided between the cutting drive shaft 102 and the cutting input shaft 19. Then, the power from the engine 16 is transmitted from the cutting drive shaft 102 to the counter shaft 116 by belt transmission, and the cutting clutch 117 is operated ("ON" and "OFF" by the cutting clutch lever provided in the operation operation unit 14). The transmission between the counter shaft 116 and the cutting input shaft 19 is performed by two spur gears 118 and 119 (gears). In the present embodiment, power (rotational motion) is transmitted between the counter shaft 116 and the cutting input shaft 19 by two identical spur gears 118 and 119 without increasing / decreasing at a speed ratio of 1.

  Of the left and right half bearings 18L and 18R, the end of the cutting input case 20 on the feed chain side (the end of the power transmission side to the cutting input shaft 19), that is, one side (left side) of the cutting input case 20 outside the machine. Counter case 121, which is a shaft tube that incorporates the counter shaft 116, the one spur gear 118, and a bearing 120 that rotatably supports the counter shaft 116 in one (left side) half bearing 18L bearing the end of the counter shaft. And the counter shaft 116 is supported on the traveling machine body side.

  The counter case 121 is integrally formed with the bearing main body 105 of the half bearing 18L having the vertical shaft 113 that serves as a left and right pivot for the cutting portion 7, and parallel to the cutting input case 20 from the outer surface of the bearing main body 105. Further, a counter case 121 is formed to extend toward the feed chain side (machine outer side) at a position obliquely below and rearward of the cutting input case 20, and an outer end serving as an opening end portion of the counter case 121 on the feed chain side (machine outer side). The part is exposed to the outside of the feed chain side end of the cutting input case 20 that is the position inside the machine body at the conveyance start end of the feed chain 5 and to the outside of the bearing stand 17. Further, the inner end opening of the counter case 121 is closed at the outer surface position of the bearing body 105, the counter case 121 is formed in a bag shape, the bearings 120 are fitted to both ends of the counter case 121, and the axis of the counter case 121 is fitted. The counter shaft 116 is rotatably supported on the upper side, the feed chain side (machine outside) end of the counter shaft 116 protrudes from the outer end opening of the counter case 121, and the input pulley 122 is engaged with the protruding end. The input pulley 122 is supported by a counter shaft 116 that is pivotally supported and eccentrically inclined downward and rearward with respect to the cutting input shaft 19 so that the upper edge does not protrude upward from the upper edge of the cutting input case 20 in a side view. The input pulley 122 on the counter shaft 116 is disposed between the feed chain side end of the cutting input case 20 and the conveyance start end of the feed chain 5. A transmission belt 124 is stretched between the output pulley 123 on the cutting drive shaft 102 via the cutting clutch 117 which is a tension roller, and the power from the engine 16 is transmitted from the cutting drive shaft 102 to the counter shaft 116. In this way, it is configured so as to be transmitted freely through the cutting clutch 117.

  Of the two spur gears 118 and 119 that transmit power (rotational motion) between the counter shaft 116 and the cutting input shaft 19, one spur gear 118 on the output side is built in the counter case 121, The other spur gear 119 on the input side is built in the cutting input case 20, and the inside of the counter case 121 immediately inside the bearing portion that rotatably supports the counter shaft 116 at the inner end of the counter case 121 is provided inside the counter case 121. A gear receiving portion 125 is formed which bulges partially on the opposite side of the bearing body 105 by a predetermined width and incorporates an output-side spur gear 118 in the vicinity of the inner end of the counter case 121 corresponding to the outer surface of the bearing body 105. In addition, the counter case is arranged so that the output side spur gear 118 can be put in and out of the gear housing part 125 of the counter case 121 from the bearing surface 105a side of the bearing body 105. A gear projecting hole 126 that opens the gear accommodating portion 125 of the bearing 121 on the surface side of the bearing surface 105 a of the bearing body 105 is provided, and the spur gear 118 on the output side having a larger diameter than the outer diameter of the counter case 121 is connected to the counter shaft 116. The spur gear 118 is supported on the inner end portion, and the spur gear 118 is countered by the gear housing portion 125 of the counter case 121 in a state where a part (upper portion) of the spur gear 118 protrudes to the surface side of the bearing surface 105a of the bearing body 105. It is incorporated so as to rotate integrally with the shaft 116. On the other hand, an input-side spur gear 119, which is the same as the output-side spur gear 118 and is slightly smaller in diameter than the inner diameter of the cutting input case 20, is supported on the end of the cutting input shaft 19 on the feed chain side by engaging shafts. The input case 20 includes a half gear having a built-in spur gear 119 on the input side so as to rotate integrally with the cutting input shaft 19 at the end on the feed chain side and a vertical shaft 113 that serves as a left and right pivot for the cutting portion 7. The bearing surface 105a of the bearing main body 105 is connected to the bearing surface of the half-bearing 18L at the end of the cutting input case 20 on the feed chain side that is supported by the bearing 18L. A part of the output-side spur gear 118 protruding from the surface side is inserted to form a gear insertion hole 127 that meshes with the input-side spur gear 119, and a vertical pivot that serves as a left and right pivot for the cutting part 7 is formed. The end portion of the cutting input case 20 on the feed chain side is supported by the half bearing 18L having 113, so that the inner end portion of the counter case 121 and the feed chain of the cutting input case 20 are inside the half bearing 18L. And the spur gear 118 on the output side of the countershaft 116 and the spur gear 119 on the input side of the cutting input shaft 19 are engaged with each other. Transmission between the counter shaft 116 and the cutting input shaft 19 is performed by two spur gears 118 and 119 which are power transmission members connected / disconnected in accordance with the mounting / removal of the cutting unit 7 with respect to the traveling machine body. It is configured.

  The gear insertion hole 127 is a gear insertion hole at a rotation position of the cutting input case 20 when the cutting unit 7 is rotated to the lowest position and a rotation position of the cutting input case 20 when the cutting part 7 is rotated to the highest position. The cutting input case 20 at the periphery of 127 is formed in the cutting input case 20 in an opening range (opening angle) so as not to interfere with the output side spur gear 118 meshing with the input side spur gear 119.

  A lid 128 is detachably fitted into the end opening on the feed chain side of the cutting input case 20, so that dust and soot from the transporting culm can be removed from the end opening on the feed chain side inside the cutting input case 20. Dust is prevented from entering.

  As is clear from the above, the power from the engine 16 is transmitted to the end portion on the feed chain side of the cutting input shaft 19 built in the cutting input case 20 which is a shaft tube serving as a vertical pivot of the cutting unit 7. Therefore, when removing the cutting part 7 from the traveling machine body, the cutting input case 20 and the cutting input shaft 19 can be removed from the traveling machine body by opening the half bearings 18L and 18R, while the half bearing 18L. The spur gear 119 externally fitted on the cutting input shaft 19 and the spur gear 118 externally fitted on the countershaft 116 are connected / disconnected in accordance with the mounting / removal of the cutting unit 7 to / from the traveling machine body. The transmission pulley 124 moves the input pulley 122 fitted on the counter shaft 116 fitted in the counter case 121 and fitted on the counter shaft 116. Due to the way tell, without removing the transmission belt 124 from the input pulley 122, it is possible to perform mounting / removal of the reaper 7 with respect to the running body.

  By the way, as shown in FIGS. 7 and 11, a bevel gear 190 is fitted and fixed at a position near the end opposite to the end where the spur gear 19 of the cutting input shaft 19 is fitted, The bevel gear 190 is meshed with a bevel gear 140 that is externally fitted and fixed to one end of the vertical transmission shaft 40 that is inserted into the vertical transmission case 21 connected to the cutting input case 20. The rotational force applied to the cutting input shaft 19 through the input pulley 122, the counter shaft 116, and the spur gears 118 and 119 is transmitted to the longitudinal transmission shaft 40 through the bevel gears 190 and 140.

  The base of the bevel gear 190 of the reaping input shaft 19 is rotatably supported by a bearing 192 fitted inside the reaping input case 20, and the end of the reaping input shaft 19 on which the bevel gear 190 is externally fitted. Is provided with a turning tool connecting portion 200 for connecting a turning tool 300 for turning the cutting input shaft 19.

  The rotating tool connecting portion 200 includes a screwing member 201 using a hexagon nut and a screwing leg portion 202 to which the screwing member 201 is screwed. The screwing leg portion 202 is configured by projecting a cylindrical body on the end face of the cutting input shaft 19 on the side where the bevel gear 190 is fitted, and projecting on the central axis of the cutting input shaft 19. Screw threads are engraved on the outer peripheral surface. A screwing member 201 is screwed to the screwing leg 202, and an annular washer 203 is interposed between the end surface of the cutting input shaft 19 and the screwing member 201.

  The turning tool connecting portion 200 is located inside the cutting input case 20, so that the turning tool connecting portion 200 is inserted into the cutting input case 20 when the cutting portion 7 is attached or detached and when the cutting portion 7 cuts. Therefore, it is possible to prevent troubles such as the turning tool connecting part 200 being caught on something, and the safety is high.

  The turning tool 300 to be connected to the turning tool connecting portion 200 includes a head portion 301 to be fitted to the screwing member 201 and a support arm 302 that supports the head portion 301, and is L-shaped or T-shaped (see FIG. 11 has an L-shaped appearance. The head portion 301 has a shape corresponding to the screwing member 201, and the dimension of the support arm 302 is appropriately longer than the dimension from the right end of the cutting input case 20 to the rotating tool connecting portion 200. It is. Then, the user externally fits the head portion 301 of the turning tool 300 to the screwing member 201 and rotates the turning tool 300 in the forward and reverse directions.

  On the other hand, the cutting input shaft 19 is normally rotated in the direction indicated by the arrow in FIG. 11, and the screwing member 201 and the screwing leg 202 of the rotating tool connecting part 200 are screwed. The fastening direction of the landing member 201 is made to coincide with the arrow direction described above. As a result, when turning force in the direction of the arrow is given to the turning tool 300 connected to the screwing member 201, the turning force is applied to the cutting input shaft 19 via the screwing member 201 and the screwing leg portion 202. The cutting input shaft 19 is forwardly rotated, and when the turning tool 300 connected to the screwing member 201 is given a turning force in a direction opposite to the arrow direction, the screwing member 201 is loosened. Since the rotational force is rotated in the direction, the rotational force is not transmitted to the screwing leg portion 202, and the cutting input shaft 19 is not rotated. Therefore, even when the turning tool 300 is rotated in the reverse movement direction of the cutting input shaft 19, the reverse movement of the cutting input shaft 19 is avoided, so that the cutting portion 7 is prevented from being damaged. The

  In FIG. 11, a hexagonal nut is used as the screwing member 201. However, the present invention is not limited to this, and nuts of various shapes such as a polygonal shape and a star shape can be used. In this case, the head portion 301 of the turning tool 300 has a shape corresponding to the shape of the screw member 201.

Combine side view Overall plan view of combine Side view of mowing unit Cutaway plan view Cutting system drive system diagram Side view of the cutting input case that serves as the vertical pivot for the cutting unit Plan view of the cutting input case part that is the vertical pivot of the cutting part Side view of bearing part at end of driver's side of mowing input case Side view of the bearing part at the feed chain side end of the cutting input case Cross-sectional side view of the bearing part at the feed chain side end of the cutting input case Cross-sectional front view of the bearing section at the feed chain side end of the cutting input case Cross-sectional plan view of the bearing part at the feed chain side end of the cutting input case Cross-sectional front view of bearing body at the end of the feed chain on the cutting input case Front view of bearing body at the end of the feed chain on the cutting input case Cross-sectional view of the feed chain side end of the cutting input case

Explanation of symbols

4 Threshing section 5 Feed chain 7 Cutting section 16 Engine 18L, 18R Half bearing 19 Cutting input shaft 20 Cutting input case (shaft tube)
102 Mowing drive shaft 113 Vertical shaft 116 Counter shaft 118, 119 Gear 121 Counter case 122 Input pulley 123 Output pulley 124 Transmission belt 127 Gear insertion hole 200 Rotating tool connecting portion 201 Threaded member 202 Threaded leg portion 300 Rotating tool

Claims (3)

Fix the counter case to the chassis of the traveling aircraft via the support,
To the counter shaft inserted in the counter case, the driving force from the engine provided in the chassis is transmitted by a belt,
A cylindrical cutting input case provided in the cutting unit is detachably supported by the chassis,
While transmitting the driving force from the counter shaft to the one end portion of the cutting input shaft inserted in the cutting input case, the driving unit is driven,
A combine comprising a turning tool connecting portion for rotating the cutting input shaft at the other end of the cutting input shaft. The turning tool connecting portion includes a screwing leg portion extending in the axial length direction of the cutting input shaft, and a screwing member screwed to the screwing leg portion,
The screwing leg portion and the screwing member are configured to rotate in a direction in which the screwing member is loosened when a force in a direction to reversely move the cutting input shaft is applied to the screwing member. Combine. The combine according to claim 1 or 2, wherein the turning tool connecting portion is located in the cutting input case.

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