JP6284027B2 - Transmission device for waste cutter in combine - Google Patents

Description

  The present invention relates to a transmission device for a waste cutter in a combine, which simplifies the transmission configuration of the waste cutter by a V-belt, makes a smooth and stable transmission configuration, and reduces belt damage.

  A technique (for example, refer to Patent Document 1) is known in which a drive belt of a cutter disposed at the rear end of a combine threshing unit is long stretched between the frontmost threshing device and a helical shaft. Yes.

JP 2012-152159 A

  The drive belt of the combine cutter is to be stretched over a long interval in the front-rear direction from the first spiral shaft portion of the threshing device to the rear end cutter shaft portion, so a tension pulley provided in the middle of this drive belt The side edge of the belt is in sliding contact with the collar (edge of the pulley's lateral edge), and the belt is subject to frictional damage, making it difficult to adjust by line alignment or changing the pulley width. Maintenance is complicated.

The invention according to claim 1 is a waste sorting chamber 3 in which a dumping device 2 that conveys the threshed waste from the threshing device 1 rearward is disposed, and a suction sorting of the threshing grains in the lower portion of the rejection chamber 3. Then, on the rear side of the dust discharge chamber 5 where the dust discharge fan 4 for discharging dust is disposed, a discharge cutter 6 that receives the discharge discharged from the discharge device 2 and cuts and discharges it in short is discharged. Side wall 8, 9 on the side of the slaughtering stock of the scouring cutter 6 and threshing device 1 while being mounted so as to be able to open and rotate to the rear side around the rotational shaft 7 located on the machine wall portion on the tip side of the spear. The fan shaft pulley 14 at the end of the dust exhaust fan shaft 13 of the dust exhaust chamber 5 on the rear upper side, the spiral shaft pulley 11 at the end of the first spiral shaft 10 of the threshing device 1, and the exhaustカ ッ タ ー A cutter drive belt 17 in the form of a V belt is hung between the cutter shaft pulley 15 at the end of the cutter shaft 15 of the 稈 cutter. Oite the gearing Hai稈cutter definitive to combine interlocked pass, wherein the front end of the side wall portion 9 of Hai稈cutter 6, counter rotating guiding the V-shaped surface portion is fitted in the cutter drive belt 17 with the pulley 18 is provided, and these front and rear counters pulley 18, and Cho圧the outer peripheral surface of the cutter drive belt 17 range to pass over over between the cutter shaft pulley 16, to form a guide edge 27 to the right and left side edges A tension pulley 19 and a tension V pulley 23 that rotates integrally with the tension pulley 19 are provided. Between the tension V pulley 23 and the diffusion shaft pulley 21 at the end of the diffusion shaft 20 at the bottom of the rejecting cutter 6. The diffusion interlocking belt 22 is provided so as to oscillate the tension pulley 19 and the tension V pulley 23, and the cutter drive bell 17 and the diffusion interlocking belt 22 Zhang pressure and, configured to transmitting the cutter shaft 15 and the diffusion axis 20, the cutter drive belt 17 to be lengthened over passed in the longitudinal direction between the cutter shaft pulley 16 and the spiral shaft pulley 11, a cutter It is set as the structure of the transmission device of the waste cutter in the combine characterized by intervening tensioning so that the tension pulley 19 may be interrupted between the shaft pulley 16 and the counter pulley 18 arrange | positioned in the position near this front side .

  In the combine operation, while the culm harvested by the reaping device is conveyed backward by the feed chain of the rear threshing device 1, the tip is supplied to the threshing chamber and threshed by the rotation of the handling cylinder. The threshing that has been threshed by the threshing device 1 is sorted by the lower sorting device, and the grains are taken out by the rotation of the first helical shaft 10, and the sorted dust is discharged at the rear end of the threshing device 1. The air is sucked by the rotation of the fan 4 and discharged outside the apparatus. In such a threshing action, the threshing that has been threshed by the threshing device 1 is conveyed rearward from the rear end of the feed chain by the rejection device 2 of the rejection chamber 3 and supplied to the cutting portion of the rejection cutter 6. And cut short. The cut waste that has been cut by the waste cutter 6 is discharged from the diffusion chamber portion where the lower diffusion shaft 20 is rotated to the cut ground of the combine travel trace.

  In such threshing and severing and cutting operations, the squeezing cutter 6 and the diffusion shaft 20 are linked by the cutter driving belt 17 in the form of a V belt from the helical shaft pulley 11 of the first helical shaft 10 below the threshing device 1. Accordingly, the cutter shaft pulley 16 and the tension pulley 18 at the rear end are rotated in conjunction with each other to rotate the cutter shaft 15, and the diffusion interlocking belt 22 is moved by the rotation of the tension V pulley 23 integrated with the tension pulley 18. The diffusion shaft pulley 21 and the diffusion shaft 20 are rotated.

  The cutter drive belt 17 is rotated and transmitted over a long time in the front-rear direction. The rear end portion of the cutter drive belt 17 extends between the cutter shaft pulley 16 and the counter pulley 18 disposed near the front side. Since the portion of the cutter drive belt 17 guided in this manner is tensioned by the tension pulley 19, the lateral vibration of the rear end portion of the cutter drive belt 17 is reduced and smooth transmission is maintained. Further, the distance between the counter pulley 18 and the cutter shaft pulley 16 is narrowed and shortened, and the tension pulley 19 is inserted so as to be inserted into the narrow space, thereby restricting and guiding the lateral movement of the cutter driving belt 17. . The tension V pulley 23 that rotates integrally with the tension pulley 19 transmits a V-belt-type diffusion interlocking belt 22 between the tension pulley 19 and the lower diffusion shaft pulley 21, so that the transmission rotation state is kept at a fixed position. Thus, the rotational position of the tension pulley 19 can be stabilized.

In the invention according to claim 1, the cutter shaft pulley is interlocked with the cutter driving belt 17 that spans from the helical shaft pulley 11 of the threshing device 1 to the cutter shaft pulley 16 of the rejecting cutter 6 that is mounted at the rear position. A counter pulley 18 is provided on the cutter side wall 9 near the front side of 16 to guide the rear end of the cutter drive belt 17, and a tension pulley 19 is stretched between the cutter shaft pulley 16 and the counter pulley 18. The tension pulley 19 is provided with a tension V pulley 23 that rotates integrally with the tension pulley 19, and the diffusion interlocking belt 22 is tensioned to transmit and rotate the diffusion shaft 20. The transfer transmission load of 22 can stabilize the rotational posture of the tension pulley 19 and The in Zhang pressure guide the rotation of the cutter drive belt 17 can be maintained in a stable state. As a result, it is possible to reduce the lateral vibration of the cutter drive belt 17 that is stretched back and forth for a long time, and to reduce the riding of the drive belt 17 on the drive belt 17 on the guide edge 27 of the tension pulley 19 and frictional damage. it can.

  Further, the interval between the counter pulley 18 and the cutter shaft pulley 16 is shortened and narrowed, and the tension pulley 19 is interposed in the narrow interval to maintain the cutter drive belt 17 in the transmission state. Therefore, it is possible to limit and regulate the lateral vibration and displacement of the cutter drive belt 17 that is stretched in the front-rear direction for a long time, making it easy to align the belt line, making it difficult to go wrong, smooth and stable. The transmission of the waste cutter can be performed, belt damage can be reduced, and the counter pulley 18 and the tension pulley 19 are disposed on the waste cutter side wall 9 of the cutter drive belt 17 in the form of the V belt. And the tension V pulley 23 and the like are provided, so that the configuration is simple.

  Further, the squeezing cutter 6 can be rotated around the rotation shaft 7 with respect to the rear end wall portion of the threshing device 1 or can be attached or detached. At this time, the cutter driving belt 17 is removed. However, since the front half of the cutter drive belt 17 is maintained long over the interval from the helical shaft pulley 11 at the front end to the counter pulley 8 portion, it is easy and easy to disengage the cutter drive belt 17. Can be In addition, maintainability can be improved.

The side view of the cutter transmission part of a combine. The side view of the cutter part. The top view of the one part. The top view of the cutter part of a combine.

  Based on the drawings, a threshing device 1, a reaping device 36, a driving device 35, and the like are mounted on a vehicle body 31 that has a crawler 30 and is driven to drive, and a waste cutter 6 is disposed at the rear end of the threshing device 1. Is provided. The threshing apparatus 1 rotates the threshing cylinder 32 around the threshing axis 33 in the front-rear direction, and threshes the tip part of the cereal cocoon that is nipped and conveyed between the root part and the culm by rotation of the feed chain 34. . A reaping device 36 that harvests and transports the grain pods is provided on the front side of the feed chain 34, and the chopped cereal grains are conveyed and supplied to the front end of the feed chain 34 by the conveying device. In the lower part of the threshing device 1, a sorting device 37 such as a swinging sorting shelf for swinging and sorting the threshing is provided, and the sorted rice is taken out from the first straw that rotates the spiral shaft 10, and It is configured to be conveyed and accommodated in a Glen tank on the rear side of the driver seat 35. A second helical shaft 38 pulley is provided on the rear side of the first helical shaft 10 to take out the second selected item. In addition, on the rear side portion of the threshing apparatus 1, a evacuation chamber 3 provided with an evacuation apparatus 2 that receives the threshed waste conveyed by the feed chain 34 and conveys it rearward is formed. A dust exhaust chamber 5 having a dust exhaust fan 4 is provided in the lower part of the stocker side in the chamber 3. Due to the rotation of the dust exhaust fan 4, dust exhausted from the threshing chamber of the threshing device 1, the sorting device 37, etc. to the dust exhaust chamber 5 is sucked by the dust exhaust fan 4 and discharged to the lower rear side. It is a form to do.

  The waste cutter 6 is attached to the rear end of the threshing device 1, receives the waste delivered to the rear end of the waste device 2, and falls into the lower diffusion chamber 39 while cutting briefly. It is discharged in a wide area along the cutting width direction by the diffusing tool around the diffusing shaft 20 rotating in the diffusing chamber 39. This waste cutter 6 has two parallel cutter shafts 15 mounted inside and behind a box-shaped cutter case 24 that is wide in the lateral direction, and the disk-shaped cutters 40 arranged along the cutter shaft 15 are mutually connected. By rotating in the opposite direction, the waste supplied from the upper rejecting device 2 to the rotating intersection of the cutters 40 is cut into short lengths for each arrangement interval between the cutters 40. Then, it is dropped and discharged to the lower diffusion chamber 39.

  An engine shaft 42 that is driven and rotated by an engine mounted on the rear lower portion of the driving device 35 is provided below the front portion of the threshing device 1, and the upper counter shaft 43 is engaged with a belt 44 from the engine shaft 42 pulley 41. To do. The counter threshing shaft 33 and the upper threshing shaft 33 are interlocked, and the belt 45 is interlocked to interlock the rearmost first helical shaft 10 and the second helical shaft 38. From the helical shaft pulley 11 at the lower end of the feed chain 34 of the first helical shaft 10 through the cutter driving belt 17 in the form of a V-belt, the rear-mounted waste cutter 6 and the diffusion shaft 20 are interlocked, The swing shaft 46 pulley 47 of the swing sorting shelf of the sorting device 37 disposed at the bottom of the threshing device 1 is interlocked by a belt 48 in the form of a V belt. Further, the evacuation device 2 rotates in conjunction with the rear end portion of the feed chain 34 via a gear mechanism or the like, and performs evacuation for conveying the evacuation chamber 3 in the left-right lateral direction to the left and right of the evacuation cutter 6. It can be transported and supplied to the upper part between the pair of front and rear cutters 40 arranged at short intervals as appropriate in a posture along the cutter shaft 15 that is pivoted horizontally. Further, a switching plate for switching the direction of evacuation is provided in the middle of the evacuation device 2, and the evacuation is supplied to the cutter 40 side or the supply to the cutter 40 side is stopped to It can be switched so that it is discharged to the outside of the machine and discharged in an uncut state.

  In addition, a diffusion tool composed of a diffusion spiral, a diffusion blower, etc., which receives the cutting straw dropped from the cutter case 24 and diffuses and discharges it widely in a uniform layer over the cutting width direction, The diffuser is rotated by the diffusion axis 20.

  Here, a waste chamber 3 in which a waste device 2 for conveying the threshed waste from the threshing device 1 is disposed rearward, and a waste in the lower portion of the waste chamber 3 for sucking and sorting the cereal and discharging it. On the rear side of the dust chamber 5 in which the dust fan 4 is disposed, a waste cutter 6 that receives the waste discharged from the waste device 2 and cuts and discharges it in a short manner is provided on the machine wall on the waste tip side. Along with the outer side of the side wall 8, 9 on the side of the slaughtering stock of the threshing cutter 6 and the threshing device 1. From the spiral shaft pulley 11 at the end of the first spiral shaft 10 of the threshing device 1, the fan shaft pulley 14 at the end of the dust exhaust fan shaft 13 of the dust exhaust chamber 5 at the upper rear side, and the cutter of the 6 sections of the waste cutter The cutter drive belt 7 in the form of a V-belt is spanned between the cutter shaft pulley 16 at the end of the shaft 15 and interlocked. In the combine, the front end portion of the side wall portion 9 of the rejecting cutter 6 is provided with a counter pulley 18 for fitting and rotating the V-shaped surface portion of the cutter driving belt 17, and the front and rear counter pulleys 18; A tension pulley 19 that tensions and swings the outer peripheral surface of the cutter driving belt 17 spanned between the cutter shaft 16 and the tension shaft 19 and a tension V pulley 23 that rotates integrally with the tension pulley 19 are provided. A diffusion interlocking belt 22 is provided between the V pulley 23 and the diffusion shaft pulley 21 at the end of the diffusion shaft 20 at the lower part of the waste cutter 6 to swing the tension pulley 19 and the tension V pulley 23. The cutter driving belt 17 and the diffusion interlocking belt 22 are tensioned to transmit the cutter shaft 15 and the diffusion shaft 20. A configuration of the transmission device Hai稈 cutter in combine to.

  In the combine operation, while the culm harvested by the reaping device 36 is conveyed backward by the feed chain 34 of the rear threshing device 1, the tip is supplied to the threshing chamber and threshed by the rotation of the handling cylinder. The threshing that has been threshed by the threshing device 1 is sorted by the lower sorting device 37, and the grains are taken out by the rotation of the first spiral shaft 10, and the sorted dust is discharged at the rear end of the threshing device 1. It is sucked by the rotation of the dust fan 4 and discharged outside the apparatus. In such a threshing action, the mash that has been threshed by the threshing apparatus 1 is conveyed rearward from the rear end of the feed chain 34 by the evacuation apparatus 2 in the evacuation chamber 3, and is fed to the cutting portion of the mashing cutter 6. Supplied and cut short. The cut waste that has been cut by the waste cutter 6 is discharged from the diffusion chamber 39 portion of the lower diffusion shaft 20 that is rotated to the harvesting ground of the combine travel trace.

  In such threshing and severing and cutting operations, the squeezing cutter 6 and the diffusion shaft 20 are linked by the cutter driving belt 17 in the form of a V belt from the helical shaft pulley 11 of the first helical shaft 10 below the threshing device 1. Accordingly, the cutter shaft pulley 16 and the tension pulley 18 at the rear end are rotated together to rotate the cutter shaft 15, and the diffusion interlocking portion belt 22 is rotated by the rotation of the tension V pulley 23 integrated with the tension pulley 18. The diffusion shaft pulley 21 and the diffusion shaft 20 are rotated.

  The cutter drive belt 17 is rotated and transmitted over a long time in the front-rear direction. The rear end portion of the cutter drive belt 17 extends between the cutter shaft pulley 16 and the counter pulley 18 disposed near the front side. Since the portion of the cutter drive belt 17 guided in this manner is tensioned by the tension pulley 19, the lateral vibration of the rear end portion of the cutter drive belt 17 is reduced and smooth transmission is maintained. Further, the front and rear distance between the counter pulley 18 and the cutter shaft pulley 16 is narrowed and shortened, and the tension pulley 18 is inserted so as to be inserted into the narrow distance portion, thereby restricting and guiding the lateral movement of the cutter driving belt 17 portion. . The tension V pulley 23 that rotates integrally with the tension pulley 19 transmits a V-belt-type diffusion interlocking belt 22 between the tension pulley 19 and the lower diffusion shaft pulley 21, so that the transmission rotation state is kept at a fixed position. Thus, the rotational position of the tension pulley 19 can be stabilized.

  Further, the counter pulley shaft 28 on which the counter pulley 18 is rotatably mounted is configured to be movable and adjustable along the counter pulley shaft 28 direction.

  As described above, by driving the helical shaft pulley 11 on the front side of the threshing apparatus 1, the cutter shaft pulley 16 on the rear upper part is transmitted by the transfer of the cutter driving belt 17, but approaches the front side position of the cutter shaft pulley 16. A tension pulley 19 and a counter pulley 18 in the form of a V pulley are provided, and the counter pulley 18 maintains the belt line with the tension pulley 19 so that the side edge of the cutter drive belt 17 is It is possible to reduce riding on the guide edge 27 on the side of the tension pulley 19, lateral swing, and excursion and rotation, and smooth and accurate transmission can be performed. When the belt line is deviated in this belt transmission, the counter pulley 18 is finely adjusted along the direction of the counter pulley shaft 28 to move the belt line on the helical shaft pulley 11 and the cutter. The belt line on the shaft pulley 16 can be matched with the belt line directly connected. The counter pulley 18 is moved by moving the counter pulley shaft 28 laterally with respect to the cutter side wall 9 so that the rotational relation position of the counter pulley 18 with respect to the counter pulley shaft 28 is maintained constant. Reduce the swing and displacement of the belt line position. Further, by moving the counter pulley shaft 28, the operation configuration can be simplified, and a stable posture can be maintained and set.

  Further, a tension pulley shaft 26 is provided at the tip of a tension arm 25 that is tensioned and swung with respect to the cutter case 24 of the rejecting cutter 6, and guide edges are provided around both ends of the tension pulley shaft 26 on the left and right side edges. The tension pulley 19 formed with 27 and a tension V pulley 23 integrally provided on the side of the pulley 19 are integrally provided.

  As described above, the tension force is applied to the outer peripheral surface of the cutter driving belt 17 that is stretched over a short interval between the rear end portion of the cutter driving belt 17 and the counter pulley 18 disposed in the vicinity of the front side of the cutter shaft pulley 16. A tension V pulley 23 integrally rotating with the tension pulley 19 is provided, and the tension pulley 19 is rotated in a transmission rotation state of the diffusion interlocking belt 22 that is transmitted across the tension V pulley 23 and the diffusion shaft pulley 21. Since the cutter drive belt 17 rotates and guides the outer peripheral surface (rear surface) of the cutter drive belt, the cutter drive belt 17 can be rotated while maintaining the guide in an accurate and stable position, making it difficult to change the belt line alignment position. Prevent the belt from being damaged by preventing the lateral displacement of the pulley 19 from climbing on the guide edge (rib) 27 portion. It can be. The cutter driving belt 17 in the form of the V-belt is wound around the pulley 11 of the first helical shaft 10 whose front end is positioned below the threshing device 1 and whose rear end is the upper cutter at the rear end of the rejecting cutter 6. It is wound around a pulley 16 of a shaft 15. A rear upper side portion of the cutter driving belt 17 is stretched over a fan shaft 13 pulley 14 of the suction dust exhaust fan 4. Also, on the lower side of the fan shaft 13 pulley 14, a pulley 51 is mounted on the side wall 8, and the back surface of the cutter driving belt 17 is wound around the pulley 51, and the pulley shaft 54 of the pulley 51, The belt is interlocked with the swing shaft 46 by a V belt 48. The pulley 51 can be configured to form a guide edge similar to the tension pulley 19 on the diffusion interlocking belt 22 side. Further, the tension pulley 52 is tensioned in the middle of the swing belt 46 interlocking V belt 48.

  The tension pulley 19, the tension V pulley 23, and the counter pulley 18 of the cutter driving belt 17 are disposed on the lower side cutter side wall 9 at the rear end portion of the cutter driving belt 17. The cutter case 24 of the rejecting cutter 6 is mounted around the tip-side rotating shaft 7 so as to be able to open and rotate backward with respect to the threshing side wall 8. By having the hook guide 55 and engaging the hook guide 55 with the guide pin 56 protruding from the upper rear end of the threshing side wall 8, the cutter case 24 can be attached and maintained at a fixed position.

  The counter pulley 18 having the V-shaped cross section is rotatably mounted by a counter pulley shaft 28 in the vicinity of the front end edge of the cutter side wall 9 of the cutter case 24. A pulley arm 59 that can be turned up and down around a mounting bolt 58 is provided on a mounting seat 57 that protrudes from the cutter side wall 9, and a counter pulley shaft 28 is inserted into and supported at the tip of the pulley arm 59, and a pair of nuts is provided. Tighten with 60 and 61, and clamp on both sides of the pulley arm 59. By rotating the nuts 60 and 61 of the counter pulley shaft 28, the mounting position of the counter pulley 18 integrated with the counter pulley shaft 28 can be moved and adjusted in the axial direction. The pulley arm 59 to which the counter pulley shaft 28 is attached is provided with a lock nut 62, and the lock nut 62 is guided through the mounting seat 57 by passing through the arc-shaped elongated hole 63, and the direction around the mounting pin 58 of the pulley arm 59 is provided. It can be fixed by changing the angular position and tightening the lock nut 62.

  A tension pulley shaft 26 of the tension pulley 19 and the tension pulley V pulley 23 is supported by a tension arm 25 that is pivoted up and down around an arm shaft 73 set at a position below the cutter shaft 15 of the cutter case 24, and a spring 65. The rotating outer peripheral surface of the cutter drive belt 17 that is stretched upward by the pressure between the cutter shaft pulley 16 and the counter pulley 18 is wound around the cutter shaft pulley 16 from the lower side to the upper side. In this manner, the tension transmission state of the belt 17 is kept constant, and the tension V pulley 23 is tensioned upward to keep the tension transmission state of the diffusion interlocking belt 22 constant.

  The diffusion shaft 20 is mounted on the side wall 67 of the diffusion case 66 below the cutter shaft 15, and is disposed between the diffusion shaft pulley 21 at the outer end of the diffusion shaft 20 and the tension V pulley 23. The diffusion interlocking belt 22 is stretched over. A rotatable tension arm 68 is provided around the diffusion shaft 20 at the lower end, and the tension pulley 69 at the tip of the tension arm 68 is tensioned by a spring 70 against the diffusion interlocking belt 22 from the inside. .

DESCRIPTION OF SYMBOLS 1 Threshing device 2 Drainage device 3 Drainage chamber 4 Dust removal fan 5 Dust removal chamber 6 Dust removal cutter 7 Rotating shaft 8 Side wall 9 Side wall 10 First spiral shaft 11 Spiral shaft pulley 13 Fan shaft 14 Fan shaft pulley 15 Cutter shaft 16 Pulley 17 Cutter drive belt 18 Counter pulley 19 Tension pulley 20 Diffusion shaft 21 Diffusion shaft pulley 22 Diffusion interlock belt 23 Tension V pulley 24 Cutter case 25 Tension arm 26 Tension pulley shaft 27 Guide edge 28 Counter pulley shaft

Claims (1)

In the threshing device (1), the sheding chamber (3) in which the threshing device (2) for conveying the threshed waste to the rear is disposed, and in the lower portion of the evacuation chamber (3), the threshing is suction-selected An exhaust cutter that cuts and discharges the waste exhausted from the exhaust device (2) to the rear side of the dust exhaust chamber (5) where the exhaust fan (4) for exhausting the dust is disposed. (6) is mounted so that it can be opened and rotated rearwardly around the rotation shaft (7) located on the machine wall portion on the side of the culling head, and the culling cutter (6) and threshing device ( 1) From the helical shaft pulley (11) at the end of the first helical shaft (10) of the threshing device (1) along the outer side of the side wall (8), (9) on the side of the waste stock of 1) The fan shaft pulley (14) at the end of the dust exhaust fan shaft (13) of the upper dust chamber (5) and the cutter shaft pulley (16) at the end of the cutter shaft (15) of the exhaust cutter portion Over between, Oite the gearing Hai稈cutter definitive to combine interlocked spanned the cutter drive belt of the V-belt form (17), said Hai稈side wall of the cutter (6) (9) The front end portion is provided with a counter pulley (18) for rotating and guiding the V-shaped surface portion of the cutter driving belt (17), and the front and rear counter pulleys (18), the cutter shaft pulley (16), and the like. and Cho圧the outer peripheral surface of the cutter drive belt (17) region to bridge over between, the left and right side edges and the tension pulley forming a guide edge (27) (19), and the tension pulley (19) An integrally rotating tension V pulley (23) is provided, and between the tension V pulley (23) and the diffusion shaft pulley (21) at the end of the diffusion shaft (20) at the bottom of the waste cutter (6). A diffusion interlocking belt (22) is laid across and the tension pulley (19) and the tension V pulley (23) are swung to tension the cutter driving belt (17) and the diffusion interlocking belt (22). The cutter drive belt (17) is configured to transmit the cutter shaft (15) and the diffusion shaft (20) and is stretched long in the front-rear direction between the cutter shaft pulley (16) and the helical shaft pulley (11). An excretion cutter in a combine characterized by intervening tension so that a tension pulley (19) is interrupted between a cutter shaft pulley (16) and a counter pulley (18) disposed at a position close to the front side . Transmission device.

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