JP2009291149A - Reaping portion of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reaping portion of a combine harvester, which can reduce vibrations and noises generated from the cutting device and simplify the cutting device and the reaping frame for supporting the device. <P>SOLUTION: The reaping portion of the combined harvester rotatably includes a plurality of disk-shaped cutting blades 231 for cutting the root sides of grain culms in the cutting device 23, the plurality of the cutting blades 231 are arranged on the approximately same straight line in the lateral direction, a transmission mechanism for transmitting a power from an actuator 233 to the cutting blades 231 is disposed downward of the cutting blades 231, a lateral driving shaft 237 included in the transmission mechanism is extended in the lateral direction, a plurality of rotation driving shafts 238 included in the transmission mechanism is extended upward from the lateral driving shaft 237, and the cutting blades 231 are disposed at the tip end of each rotation driving shaft 238. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a harvesting unit for a combine that harvests cereal grains.

  Conventionally, the harvesting part of a combine provided with the cutting device which cut | disconnects the induced corn straw is known. In such a combine harvester, the cutting device includes a fixed blade and a movable blade extending in the left-right direction as a main auxiliary cutting blade for cutting the cereal, and the fixed blade and the movable blade are vertically stacked. In the state, the cereal was cut by sliding the movable blade back and forth with respect to the fixed blade.

However, such a cutting device has a problem that large vibration and noise are generated when the cereal is cut by the fixed blade and the movable blade. Then, in order to eliminate this problem, what used the disk-shaped cutting blade as a main auxiliary cutting blade for cut | disconnecting a grain candy has been proposed (for example, refer patent document 1). This cutting device is configured so that a plurality of disk-shaped cutting blades (disk-shaped rotary cutters) are arranged in substantially the same straight line in the left-right direction, and each is driven to rotate, thereby cutting the cereals. It had been.
Japanese Patent Laid-Open No. 11-46552

  The conventional combine harvester can reduce the vibration and noise generated by the cutting device, but the drive source of the cutting device, that is, the drive source of a plurality of disk-shaped cutting blades, is the combine engine. Since the driving means is provided in the front and rear of the cutting frame that supports the cutting device, the cutting device and the cutting frame have a complicated configuration.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a combine harvester that can reduce vibration and noise generated from a cutting device, and can simplify the cutting device and a cutting frame that supports the cutting device.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, according to claim 1, a weeding tool for weeding cereals, a pulling device for causing a plurality of stalks weeded by the weeding tool, and a plurality of cereals caused by the pulling device A harvesting unit for a combine, comprising: a cutting device that cuts the straw, a transport device that transports the cereals cut by the cutting device to the threshing unit side, and a cutting frame that supports the weed tools and the devices. The cutting device comprises a plurality of disk-shaped cutting blades for cutting the cereals on the stock market side so as to be rotationally driven, and the plurality of cutting blades are arranged in a substantially same straight line in the left-right direction, A transmission mechanism that transmits power from a driving source to the plurality of cutting blades is disposed below the cutting blades, and a drive shaft included in the transmission mechanism extends in the left-right direction, and the transmission mechanism A plurality of rotational drive shafts included in the drive To extend from upwards, it is intended to provide the cutting blade tips of the said rotary drive shaft.

  According to a second aspect of the present invention, the cutting device includes a drive pipe that covers and supports the drive shaft in a horizontal direction across a plurality of the cutting blades, and the left and right ends of the drive pipe are connected to the cutting frame. And the drive pipe and the cutting frame are integrally configured.

  According to a third aspect of the present invention, the cutting frame is provided so as to be pivotable in the vertical direction with respect to the airframe, and the cutting device fixes the plurality of cutting blades detachably to the rotary drive shaft from below by fixing means. Is.

  As effects of the present invention, the following effects can be obtained.

  According to invention of Claim 1, the vibration and noise which generate | occur | produce from a cutting device can be reduced. In addition, the transmission device that interlocks and connects the cutting blade and the actuator can have a simple structure, so that the cutting device can be simplified. Furthermore, it is possible to prevent the cereal cake after cutting from being wound around a part of the transmission mechanism.

  According to the second aspect of the present invention, it is possible to simplify the structure of the cutting frame and the cutting frame that supports the cutting device by simplifying the support structure of the plurality of cutting blades and the cutting device for the cutting frame. . Moreover, the strength of the entire cutting frame can be improved by the drive pipe.

  According to the third aspect of the present invention, it is possible to easily attach and detach the cutting blade from below the cutting device without removing another member from the cutting frame when the cutting frame is rotated upward. Therefore, maintenance and the like can be easily performed.

  Next, embodiments of the invention will be described.

  First, the overall configuration of a four-row combine combine 1 having a cutting unit 20 according to an embodiment of the present invention will be described. In addition, the cutting part which concerns on this invention is applicable not only to the combine of a four-row cutting but the combine of a multiple cutting.

  As shown in FIG. 1, the combine 1 has a traveling unit 10, a cutting unit 20, a threshing unit 30, a sorting unit 40, a grain storage unit 50, and a waste processing unit with respect to the body frame 2. 60, an engine unit 70, a mission unit 80, and a control unit 90 are provided.

  The traveling unit 10 is provided in the lower part of the body frame 2. The traveling unit 10 includes a crawler traveling device 11 having a pair of left and right crawlers, and is configured such that the body can travel in the forward or backward direction by the crawler traveling device 11.

  The cutting unit 20 is provided at the front end of the body frame 2 so as to be movable up and down with respect to the body. The cutting unit 20 includes a weeding tool 21, a pulling device 22, a cutting device 23, a transporting device 24, and the like. It is configured to cause the cereals of the cereals to be cut, to cut the cereals after raising by the cutting device 23, and to transport the cereals after cutting to the threshing unit 30 side by the transport device 24.

  The threshing unit 30 is provided at the left front portion of the machine body frame 2 and is disposed behind the reaping unit 20. The threshing unit 30 includes a transport device 31, a handling cylinder, a receiving net, and the like. And it is comprised so that the threshing grain currently conveyed can be threshed by a receiving net.

  The sorting unit 40 is provided on the left side of the machine body frame 2 and is disposed below the threshing unit 30. The sorting unit 40 includes a rocking sorting device, a wind sorting device, a grain conveying device, a sawdust discharging device, and the like. Swaying and sorting into dust and dust, etc., wind-sorting with the wind sorting device further into the grain and swarf and dust, etc., and grain storage after the grain selection after the grain transport device While being conveyed to the part 50 side, it is comprised so that a soot waste, dust, etc. can be discharged | emitted outside by a soot waste discharging apparatus.

  The grain storage part 50 is provided in the right rear part of the body frame 2, and is arrange | positioned at the right side of the threshing part 30 and the selection part 40. FIG. The grain storage unit 50 includes a grain tank 51, a grain discharge device 52, and the like. The grain storage unit 50 stores the grain conveyed from the sorting unit 40 by the grain tank 51, and is being stored by the grain discharge device 52. It is comprised so that it can discharge | emit outside after conveying a grain of any direction.

  The waste disposal unit 60 is provided at the left rear portion of the machine body frame 2 and is disposed behind the threshing unit 30. The waste processing unit 60 includes a waste transporting device, a waste cutting device, and the like. It is configured such that it can be discharged or conveyed to a waste cutting device and cut by the waste cutting device and then discharged to the outside.

  The engine unit 70 is provided at the front right side of the machine body frame 2 and is disposed in front of the grain storage unit 50. The engine unit 70 includes an engine and the like, and is configured so that the power of the engine unit 70 can be supplied to each unit device using the engine as a driving source via an appropriate transmission mechanism so that the device unit can be driven by the engine. Is done.

  The mission unit 80 is provided at the right front portion of the body frame 2 and is disposed in front of the engine unit 70. The mission unit 80 includes a transmission and the like, and is configured so that the power of the engine of the engine unit 70 can be shifted by the transmission before being supplied to each device such as the traveling unit 10 and the cutting unit 20. Is done.

  The control unit 90 is provided at the right front part of the body frame 2 and is disposed above the engine unit 70 and the mission unit 80. The control unit 90 includes various operation tools including a steering handle 91 and a shift lever, a control seat 92, a cabin 93, and the like, and operates a device of each part with the operation tools to seat the driver on the control seat 92. The cabin 93 can cover the operation tool and the cockpit 92.

  As described above, the combine 1 is configured by appropriately providing each part on the machine body frame 2, and supplies engine power from the engine unit 70 to the devices of each part in accordance with the operation of the operation tool in the control unit 90. Then, while the vehicle is traveling in the traveling unit 10, the harvesting unit 20 harvests the cereals in the field, the threshing unit 30 threshs the culm from the harvesting unit 20, and the sorting unit 40 threshs the cereal from the threshing unit 30. The grain storage unit 50 stores the grain from the sorting unit 40, and at the same time, the waste processing unit 60 can discharge the waste from the threshing unit 30 to the outside.

  Next, the configuration of the cutting unit 20 will be described.

  As shown in FIG. 2, the cutting unit 20 includes a cutting frame 110 in addition to the above-described weeding tool 21, the pulling device 22, the cutting device 23, and the conveying device 24. It is supported by the left front end of the frame 2 and is disposed in front of the body frame 2.

  In the support portion of the cutting unit 20, on the body frame 2 side, a pair of left and right support bases 3 are erected in parallel at a predetermined interval in the left-right direction at the left front end portion of the body frame 2. A pipe receiving member 4 is provided on each of the left and right support bases 3.

  On the cutting unit 20 side, the cutting frame 110 is provided with a cutting input pipe 111. Then, the cutting input pipe 111 is horizontally disposed in the horizontal direction between the pipe receiving members 4 on the left and right support bases 3 above the left front end portion of the machine body frame 2. Each is rotatably supported by a pipe receiving member 4 on the support 3.

  The cutting frame 110 includes a cutting input pipe 111, a vertical transmission pipe 112, a horizontal transmission pipe 113, a plurality of weed frames 114, a drive pipe 115, left and right pulling vertical transmission pipes 116, and a pulling horizontal. A transmission pipe 117, a plurality of pulling drive pipes 118, and a connection frame 119 are provided.

  In the cutting frame 110, the vertical transmission pipe 112 is disposed in front of the cutting input pipe 111 and extends from the middle of the left and right of the cutting input pipe 111 toward the front obliquely downward direction. The horizontal transmission pipe 113 is disposed in front of the vertical transmission pipe 112 and extends from the front end of the vertical transmission pipe 112 in the left-right direction.

  The plurality of weed frames 114 are arranged in front of the lateral transmission pipe 113 and are arranged in parallel with each other at an appropriate interval in the left-right direction. Among these weed frames 114, the left and right outer weed frames 114 </ b> A located on the outermost side extend forward from the left and right ends of the lateral transmission pipe 113, respectively.

  Among the plurality of weed frames 114, the inner weed frame 114B located inside the remaining left and right outer weed frames 114A is directed forward from the left and right middle portion of the drive pipe 115 in the left and right directions at predetermined intervals. It is extended.

  Here, in these inner weed frames 114B, between the left and right outer weed frames 114A, the left and right widths of the inner weed frame 114B and the right outer weed frame 114A are the left and right widths of the inner weed frames 114B. , And the left and right widths of the inner weed frame 114B and the left outer weed frame 114A.

  The drive pipe 115 is disposed below the front transmission pipe 113 and is horizontally disposed in the left-right direction between the rear portions of the left and right outer weed frames 114A. That is, the drive pipe 115 and the lateral transmission pipe 113 are arranged in parallel with each other at a predetermined interval in the front-rear direction.

  The left and right elevating vertical transmission pipes 116 are arranged above the horizontal transmission pipe 113 and are erected from the left and right ends of the horizontal transmission pipe 113 upward and obliquely upward. The pulling horizontal transmission pipe 117 is disposed in front of and above the horizontal transmission pipe 113, and is horizontally provided in the horizontal direction between the upper ends of the left and right pulling vertical transmission pipes 116.

  The plurality of pull-up drive pipes 118 are disposed below the pull-up lateral transmission pipe 117 and extend downward from the left and right midway portions of the pull-up horizontal transmission pipe 117 in the left-right direction at predetermined intervals. The connecting frame 119 is disposed behind the pulling horizontal transmission pipe 117 and extends rearward from the left and right midway part of the pulling horizontal transmission pipe 117 to the rear part of the vertical transmission pipe 112.

  Thus, the cutting frame 110 includes the cutting input pipe 111, the vertical transmission pipe 112, the horizontal transmission pipe 113, the plurality of weed frames 114, the drive pipe 115, the left and right pulling vertical transmission pipes 116, and the pulling horizontal transmission. A pipe 117, a plurality of pulling drive pipes 118, and a connecting frame 119 are integrally connected.

  Then, the weeding tool 21, the pulling device 22, the cutting device 23, the conveying device 24, and the like are appropriately supported by the mowing frame 110. When supported by the cutting frame 110, the weeding tool 21, the pulling device 22, and the transport device 24 are arranged from the front to the rear in this order, and the cutting device 23 is transported behind the pulling device 22. 24 is arranged below the conveyance start end.

  As shown in FIG. 3, the weeding tool 21 is provided with five weeding plates 211 for four strips. Each of the weed boards 211 has a tapered shape, and protrudes forward from the front ends of a plurality of weed frames 114, that is, left and right outer weed frames 114A and three inner weed frames 114B.

  The pulling device 22 is provided with four pulling cases 221 for four lines. Each pulling case 221 includes a tine-attached chain 222 and the like, and is configured to be capable of rotational driving. These pulling cases 221 are arranged behind the weeding tool 21 with an appropriate interval in the left-right direction, and are erected between the weeding frame 114 and the pulling drive pipe 118 in a slanted shape with front, rear, and rear heights. The

  The transport device 24 includes a scraping mechanism 241 and a transport mechanism 245. The scraping mechanism 241 is disposed on the front side of the transport device 24 and is provided at the transport start end of the transport device 24. On the other hand, the transport mechanism 245 is disposed on the rear side of the transport device 24, and is provided at a midway transport portion and a transport end portion of the transport device 24.

  The take-in mechanism 241 includes left and right take-in devices 242L and 242R and four take-in wheels 243. The left and right scratching devices 242L and 242R each have a pair of left and right protruding belts and the like, and are configured to be able to rotate these. The left and right scratching devices 242L and 242R are respectively arranged behind the pulling case 221 and extend in a slanted shape with front and rear and rear height from the pulling case 221 side toward the rear.

  The left and right scratching devices 242L and 242R are arranged so that a pair of left and right protruding belts are largely opened forward toward the left or right two pulling cases 221. That is, the left and right scraping devices 242L and 242R are arranged such that the left and right widths on the front side of the two pulling cases 221 are widened and the left and right widths on the rear side are narrowed.

  Each of the four scraping wheels 243 is a star wheel, and is configured to be rotationally driven. Each of the scraping wheels 243 is disposed below the rear part of each protrusion-equipped belt of the left and right scratching devices 242L and 242R, and is provided in an inclined shape with a front, a rear, and a height.

  The transport mechanism 245 includes left and right lower transport devices 246L and 246R, an upper transport device 247, a vertical transport device 248, and an auxiliary transport device 249. Each transport device includes a chain and the like, and is configured to be able to rotate these. The lower left conveying device 246L is disposed behind the left scratching device 242L, and extends in a slanted shape with a front low and a rear height from the left scratching device 242L side toward the right diagonal rear. The lower right transfer device 246R is disposed behind the right scratching device 242R, and extends in a slanted shape with a front low and a rear height from the right scratching device 242R side toward the left diagonal rear.

  The upper transport device 247 is disposed behind the pulling device 22 and above the lower right transport device 246R, and extends in a slanted shape with front, rear, and rear heights from the right scratching device 242R side toward the left oblique rear. The The vertical transfer device 248 is disposed behind the lower left transfer device 246L and below the upper transfer device 247, and extends in a slanted shape with a front, rear, and rear height from the left lower transfer device 246L toward the left oblique rear. Is done. The auxiliary conveyance device 249 is disposed behind the vertical conveyance device 248 and below the upper conveyance device 247, and extends from the vertical conveyance device 248 side to the conveyance device 31 of the threshing unit 30 toward the rear.

  The cutting device 23 includes a plurality of cutting blades including a cutting blade 231 and an auxiliary cutting blade 232, and an actuator 233. As will be described later, the cutting blade 231 and the auxiliary cutting blade 232 are disposed below the scraping mechanism 241 and are provided in an inclined shape with front and rear heights. The actuator 233 is disposed in the vicinity of the cutting blade 231 and the auxiliary cutting blade 232, and is interlocked and connected to the cutting blade 231 and the auxiliary cutting blade 232.

  Furthermore, in the cutting frame 110 that supports the weeding tool 21 and each device, the cutting input shaft 121 is inserted into the cutting input pipe 111, and the cutting transmission shaft is inserted into the other pipes. It is. Then, the pulling device 22 and the conveying device 24 are interlocked and connected to the engine of the engine unit 70 via each cutting transmission shaft and the cutting input shaft.

  Thus, the pulling device 22 and the conveying device 24 can be driven by obtaining power supplied from the engine of the engine unit 70 as a driving source. Further, the cutting device 23 is configured to be driven independently using the power of the actuator 233 as a drive source, in other words, to be driven independently from the engine.

  With such a configuration, when each device is driven in the cutting unit 20, after the weeds are split so that the cereals in the field are separated by the weeding plate 211 of the weeding tool 21, the pulling device 22, the raising case 221 causes cereals after weeding. Subsequently, the left and right two strips after pulling are introduced from between the left and right pulling cases 221 by the left and right scratching devices 242L and 242R and the scraping wheel 243 by the scraping mechanism 241 of the transport device 24, respectively. The cereal side of the cereals is raked into a bunch.

  At this time, the cereal after moving is cut by the cutting device 23 by the cutting blade 231 and the auxiliary cutting blade 232 on the stock side. After being cut, the cereals are transported by the transport mechanism 245 of the transporting device 24, and the right lower strips are transported by the lower right transporting device 246R to the left diagonally, and at the same time the left lower transporting device 246L is transported. The straw is transported to the right oblique rear, and the stock base side of the four grain cereals is joined in the vicinity of the transport end portion of the lower right transport device 246R.

  Next, the upper transport device 247 transported the left side of the stalks of the stalks to the left obliquely while being gathered together, and the vertical transport device 248 joined the vicinity of the transport end portion of the lower right transport device 246R. The stock side of the stalks of the four stalks is transported obliquely upward toward the transport device 31 of the threshing unit 30, and the stock source side of the cereals is transferred from the vertical transport device 248 to the transport device 31 of the threshing unit 30 by the auxiliary transport device 249. Passed. In this way, a series of cutting operations for the cereals are performed in the cutting unit 20.

  In the cutting unit 20, the cutting frame 110 connects the front and rear intermediate portions of the longitudinal transmission pipe 112 to the tip of the lifting cylinder 5 extending forward from the front lower part of the body frame 2, and the lifting cylinder 5 It is configured to be able to turn up and down around the cutting input pipe 111 in accordance with the expansion and contraction drive. The elevating cylinder 5 can be extended and retracted according to manual operation of the operation tool of the control unit 90.

  When the elevating cylinder 5 is driven to extend and contract, the mowing frame 110 is rotated upward around the mowing input pipe 111 when the elevating cylinder 5 is driven to extend, and is lowered around the mowing input pipe 111 when the elevating cylinder 5 is driven to contract. Is rotated. Thereby, the whole cutting part 20 is raised with respect to the body when the cutting frame 110 is rotated upward, and is lowered with respect to the body when the cutting frame 110 is rotated downward.

  Next, the configuration in the vicinity of the cutting device 23 that is a main part of the present invention will be described.

  As shown in FIGS. 4 and 5, the cutting device 23 includes a plurality of cutting blades 231 having the same number as the number of grain ridges caused by the pulling device 22, that is, the number of reaping lines of the culm to be harvested, and one auxiliary unit. A cutting blade 232 and an actuator 233 are provided. In this embodiment, since the number of cutting lines is four, the cutting device 23 includes four cutting blades 231A, a second cutting blade 231B, a third cutting blade 231C, and a fourth cutting blade 231D. Two cutting blades 231 are provided.

  The first to fourth cutting blades 231A to 231D are each formed into a disk shape having a predetermined width, and have the same shape. The auxiliary cutting blade 232 is formed in a disk shape like the cutting blade 231, and has a smaller diameter than the first to fourth cutting blades 231A to 231D. The first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 are configured to have a blade portion at the outer peripheral edge portion and a fixing portion at the center portion.

  In addition, the diameter of the 1st-4th cutting blades 231A-231D is set to the extent which can cut | disconnect one grain of cereals. On the other hand, the diameter of the auxiliary cutting blade 232 is appropriately set according to the cutting width of the cutting device 23 within a range smaller than the diameters of the first to fourth cutting blades 231A to 231D. Actually, the auxiliary cutting blade 232 is used by being changed to one having an appropriate diameter according to the cutting width of the cutting device 23.

  The first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 are disposed in front of the lateral transmission pipe 113 and between the left and right outer weed frames 114A in this order from left to right. . Here, the first to fourth cutting blades 231A to 231D are arranged on the same plane and on the same straight line in the left-right direction. The auxiliary cutting blade 232 is substantially the same plane as the first to fourth cutting blades 231A to 231D, and among the plurality of cutting blades 231, one of the left and right (right) fourth cutting blades 231D. Lined up outward.

  Among the plurality of cutting blades 231, the first cutting blade 231A located on the outermost left and right other (left) is left so that the left end of the blade portion slightly overlaps the left outer weed frame 114A in plan view. Arranged just inside the outer weed frame 114A. The second cutting blade 231B is disposed between the adjacent inner weed frames 114B so that the left and right ends of the blade portion slightly overlap the inner weed frames 114B in plan view. The third cutting blade 231C is disposed between the adjacent inner weed frames 114B so that the left and right ends of the blade portion slightly overlap with the inner weed frames 114B in plan view.

  The fourth cutting blade 231D is arranged immediately outside the inner weed frame 114B so that the left end of the blade part slightly overlaps the inner weed frame 114B in plan view. The auxiliary cutting blade 232 is disposed immediately inside the right outer weed frame 114A so that the right end of the blade part slightly overlaps the right outer weed frame 114A in plan view. That is, the fourth cutting blade 231D and the auxiliary cutting blade 232 are both disposed between the adjacent inner weed frame 114B and the outer weed frame 114A.

  Among these cutting blades 231, adjacent cutting blades 231 do not overlap each other and are arranged with a predetermined width in the left-right direction in advance. Specifically, the first cutting blade 231A, the second cutting blade 231B, the second cutting blade 231B, the third cutting blade 231C, the third cutting blade 231C, and the fourth cutting blade 231D are respectively inside each other. The width of the weeding frame 114B is approximately the same as the width of the weeding frame 114B.

  On the other hand, the adjacent auxiliary cutting blade 232 and the fourth cutting blade 231D are disposed so as to partially overlap each other. Thus, the first to fourth cutting blades 231A to 231D and the left outer weeding frame 114A or the inner weeding frame 114B are arranged so that there is no gap between them in plan view, and the auxiliary cutting blade 232, the right outer weed frame 114A, and the fourth cutting blade 231D are arranged such that no gap is generated between them in plan view.

  Here, as described above, the auxiliary cutting blade 232 is set such that the left-right width between the inner weed frame 114B and the right outer weed frame 114A is larger than the left-right width between the other weed frames 114. Therefore, it is arranged between the inner weed frame 114B and the right outer weed frame 114A together with the adjacent fourth cutting blade 231D so as to partially overlap therewith.

  In addition, the first to fourth cutting blades 231A to 231D are respectively arranged almost directly below the respective scraping wheels 243 provided in the scraping mechanism 241 of the transport device 24, the pulling device 22 side is lowered, and the threshing portion The side 30 is higher, that is, it is provided in an inclined shape with a front low and a high rear. In this way, both the scraping wheel 243 and the first to fourth cutting blades 231A to 231D are provided in an inclined shape of front, low, and high, and are arranged vertically with different degrees of inclination, that is, not parallel to each other.

  The degree of inclination of each of the first to fourth cutting blades 231A to 231D with respect to the horizontal ground is set more gently than the degree of inclination of each of the scraping wheels 243 with respect to the horizontal ground. In other words, the degree of inclination of each of the first to fourth cutting blades 231A to 231D with respect to the horizontal ground is greater than that of each of the stirring wheels 243 to the horizontal ground than each of the first to fourth cutting blades 231A to 231D. It is set to tilt.

  The degree of inclination of each of the first to fourth cutting blades 231A to 231D is such that the lateral transmission pipe 113 of the cutting frame 110 disposed further rearward is the threshing portion 30 side of the first to fourth cutting blades 231A to 231D in a side view. It is set so as to be located below the extended line. Note that the degree of inclination of the plurality of scraping wheels 243 is set to be the same.

  Moreover, the auxiliary cutting blade 232 is arrange | positioned in the lower right of the right picking wheel 243 located in the outermost side among the some picking wheels 243, and is similar to the first to fourth cutting blades 231A to 231D. Provided with a high slope. The inclination degree of the auxiliary cutting blade 232 is set to the same degree as the inclination degrees of the first to fourth cutting blades 231A to 231D.

  The auxiliary cutting blade 232 is further forward on the right outside of the front portion of the fourth cutting blade 231D so that the front end side of the blade portion is aligned with the front end side of the blade portions of the fourth cutting blades 231A to 231D from the first to the left and right. Arranged closer. As a result, for the installation of an actuator having a size that allows the actuator 233 to be installed behind the auxiliary cutting blade 232 and on the right outer side of the rear portion of the fourth cutting blade 231D, that is, on the right end of the cutting device 23. A space 235 is formed.

  In addition, on the side of the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232, the rear part of each weed frame 114 is approximately the same as the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232. It bends in the shape of an inclination of front low and high after inclination. The rear portions of these weed frames 114, the first to fourth cutting blades 231A to 231D, and the auxiliary cutting blade 232 are arranged below and in parallel with each other in a side view.

  And the left and right cover bodies 130 are extended toward the front obliquely upward at the rear portions of the left and right outer weed frames 114A among the plurality of weed frames 114. The left and right cover bodies 130 are set to be larger than the front and rear and vertical widths of the first cutting blade 231A and the auxiliary cutting blade 232 that are positioned on the outermost side in the front and rear and vertical widths, so that the first cutting blade 231A and the auxiliary cutting blade 232 are disposed. Can be covered from the left and right outer sides.

  As shown in FIGS. 6 and 7, the actuator 233 is provided in the actuator installation space 235 described above. The actuator 233 is configured by a hydraulic motor, and supplies power to the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 via a transmission mechanism, and these can be driven to rotate. The actuator 233 may be configured with an electric motor or the like, and is not limited to a hydraulic motor.

  The actuator 233 is driven and controlled by a control device provided at an arbitrary position of the machine body. This control device is connected to the actuator 233, and also detects from the operation tool of the control unit 90 and a detection sensor that detects the driving state of the pulling device 22 and the transport device 24 of the cutting unit 20, for example, the engine of the engine unit 70 This is connected to a cutting clutch detection sensor that detects the on / off state of the cutting clutch that switches the power supply to the pulling device 22 and the conveying device 24 of the unit 20.

  Then, the driving state of the actuator 233 is controlled by the control device to any one of the driving in the forward direction, the driving in the reverse direction, and the stop according to the manual operation of the operation tool of the control unit 90. Configured to be In addition, or depending on the driving state of the pulling device 22 and the conveying device 24 of the cutting unit 20 detected by the detection sensor, it automatically switches to one of the driving and stopping states in conjunction with the pulling device 22 and the conveying device 24. Configured to be controlled.

  The actuator can be configured not only to be electrically driven and controlled by the control device but also to be mechanically driven and controlled. For example, when the actuator is a hydraulic motor, a switching valve is provided in the middle of a pipe connecting the hydraulic motor and a hydraulic pump that sends hydraulic oil to the hydraulic motor. By interlocking connection, it becomes possible to control the driving state of the actuator as described above.

  The actuator 233 is interposed between the lateral transmission pipe 113 and the drive pipe 115 in the actuator installation space 235. The drive pipe 115 is disposed as described above, and is disposed so as to pass below the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232, in particular, near the lower portion of these fixing portions. The end portion is connected to the rear portion of the outer weeding frame 114A that is inclined at the front low, high, and high slopes.

  The drive pipe 115 is provided with a first extending portion 115b and a plurality of second extending portions 115c with respect to a pipe body 115a extending in the left-right direction. The first extending portion 115b extends from the right side portion of the pipe main body 115a to the front and rear in the vicinity of the lower side of the auxiliary cutting blade 232 in a front-rear and a rear-high shape. The first extending portion 115b extends forward so that the front end portion does not protrude from the blade portion through the lower portion of the auxiliary cutting blade 232, while the rear end portion protrudes from the blade portion. Thus, it extends toward the rear and is connected to the actuator 233 at the rear end.

  The plurality of second extending portions 115 c are disposed below the fixing portions of the first to fourth cutting blades 231 </ b> A to 231 </ b> D and the auxiliary cutting blade 232, respectively. Of these second extending portions 115c, four second extending portions 115c are respectively provided from the left and right middle portions of the pipe main body 115a, and one second extending portion 115c is inclined forward and obliquely from the first extending portion 115b. The first to fourth cutting blades 231 </ b> A to 231 </ b> D and the auxiliary cutting blade 232 are extended to the immediate front.

  And the transmission mechanism of the cutting device 23 is provided in the inside of the drive pipe 115 comprised in this way from the pipe main body 115a, the 1st extension part 115b, and the some 2nd extension part 115c. The transmission mechanism includes a vertical drive shaft 236, a horizontal drive shaft 237, a plurality of rotary drive shafts 238, a plurality of bevel gears, and the like.

  The vertical drive shaft 236 is disposed inside the first extension portion 115 b and extends from the actuator 233 toward the front lower side so as to pass below the fixing portion of the auxiliary cutting blade 232. The vertical drive shaft 236 is rotatably supported by the first extending portion 115b via a bearing at an appropriate position in the front-rear direction, and is linked to the output shaft of the actuator 233. The vertical drive shaft 236 can also serve as the output shaft of the actuator 233.

  The horizontal drive shaft 237 is disposed inside the pipe body 115a and extends from the middle of the vertical drive shaft 236 to the left so as to pass below the fixed portion of the first to fourth cutting blades 231A to 231D. . The horizontal drive shaft 237 is rotatably supported by the pipe body 115a via a bearing at an appropriate position in the left-right direction, and is linked to the vertical drive shaft 236 via a bevel gear.

  The plurality of rotary drive shafts 238 are respectively disposed inside the second extending portion 115c, and are directed from the first to the fourth cutting blades 231A to 231D from the middle of the horizontal drive shaft 237 or the vertical drive shaft 236 upward. It extends to the fixed part of the auxiliary cutting blade 232. The plurality of rotary drive shafts 238 are rotatably supported by the second extending portion 115c via bearings at appropriate locations in the vertical direction, and the rotary drive shafts on the first to fourth cutting blades 231A to 231D side. 238 is coupled to the lateral drive shaft 237 via a bevel gear, and the rotary drive shaft 238 on the auxiliary cutting blade 232 side is coupled to the longitudinal drive shaft 236 via a bevel gear.

  The first to fourth cutting blades 231A to 231D are positioned behind the first to fourth cutting blades 231A to 231D at the fixed portion so that the first to fourth cutting blades 231A to 231D are orthogonal to the axial direction of the rotation drive shaft 238 in a side view. Fixed to the tip of the rotary drive shaft 238. Similarly, the auxiliary cutting blade 232 is fixed to the distal end portion of the rotary drive shaft 238 located on the back side of the auxiliary cutting blade 232 at the fixed portion so as to be orthogonal to the axial center direction of the rotary drive shaft 238 in a side view. The

  Thus, the actuator 233 is interlocked and connected to the first to fourth cutting blades 231A to 231D by the vertical drive shaft 236, the horizontal drive shaft 237, the plurality of rotary drive shafts 238, and the like. The actuator 233 is further coupled to the auxiliary cutting blade 232 by a vertical drive shaft 236, a rotary drive shaft 238, and the like.

  Thereby, when the actuator 233 is driven based on the drive control of the control device, power is transmitted from the actuator 233 to the fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 via the transmission mechanism. The first to fourth cutting blades 231 </ b> A to 231 </ b> D and the auxiliary cutting blade 232 are driven to rotate about the rotation drive shaft 238.

  The rotational speeds of the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 at the time of rotational driving can be arbitrarily adjusted by appropriately driving and controlling the actuator 233 by the control device. When the cereal is cut by the four cutting blades 231A to 231D and the auxiliary cutting blade 232, the rotation speed is set to be a constant rotation speed and set to be the same rotation speed. Note that the rotational speed of the first to fourth cutting blades 231 </ b> A to 231 </ b> D may be set to be faster than the rotational speed of the auxiliary cutting blade 232.

  The rotation directions of the first to fourth cutting blades 231A to 231D are set by the transmission mechanism so that the rotation directions of the adjacent cutting blades 231 are different from each other. Specifically, the rotation directions of the first to fourth cutting blades 231A to 231D are the first cutting blade 231A and the second cutting blade 231B, the second cutting blade 231B and the third cutting blade 231C, and the third cutting blade 231C. The rotation directions with the fourth cutting blade 231D are set to be different from each other.

  The rotation direction of the auxiliary cutting blade 232 is set to be the same rotation direction as the rotation direction of the adjacent cutting blades 231. Specifically, the rotation direction of the auxiliary cutting blade 232 is set by the transmission mechanism so as to be the same rotation direction as the rotation direction of the fourth cutting blade 231D.

  In the present embodiment, the rotation directions of the first cutting blade 231A and the third cutting blade 231C are set in the clockwise direction in FIG. 4, and the rotation directions of the second cutting blade 231B and the fourth cutting blade 231D are as shown in FIG. 4 is set in the counterclockwise direction. The rotation direction of the auxiliary cutting blade 232 is set in the counterclockwise direction in FIG. 4 as with the fourth cutting blade 231D.

  Thus, when the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 are rotationally driven, the first cutting blade 231A and the second cutting blade 231B have the same rotation direction as the upper scraping wheel 243, respectively. That is, it is rotationally driven in the direction of the take-in of the take-up wheel 243 and the left take-in device 242L.

  The third cutting blade 231C and the fourth cutting blade 231D are rotationally driven in the same rotational direction as the upper scraping wheel 243, that is, the scraping direction of the scraping wheel 243 and the right scraping device 242R, respectively. ing. The auxiliary cutting blade 232 is rotationally driven in the same rotational direction as the fourth cutting blade 231D and the scraping wheel 243 above it, that is, the scraping direction of the scraping wheel 243 and the right scratching device 242R. .

  Note that the rotation directions of the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 can be switched to rotation directions opposite to those described above. The rotation direction is switched by operating the operating tool of the control unit 90, etc., so that the actuator 233 is driven and controlled by the control device, and is driven in the normal rotation direction or the reverse rotation direction which is the reverse rotation direction from the previous direction. Is done.

  With such a configuration, in the vicinity of the cutting device 23, when the pulling device 22 and the transport device 24 are driven, the cutting device 23 is also driven simultaneously. That is, power is transmitted from the first to the fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 from the actuator 233, and the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 are set as described above. Driven rotationally at speed and direction of rotation.

  Then, the left and right cereal grains caused after weeding are scraped backwards by the left and right scratching devices 242L and 242R and the scraping wheels 243 of the transport mechanism, while the left and right outer sides are respectively separated by one line. Passing between the weeding frame 114A and the inner weeding frame 114B, or between the inner weeding frames 114B, the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 side by each weeding frame 114. You will be guided towards.

  In addition, among the grain straws for each row, those passing through between the left outer weed frame 114A and the inner weed frame 114B and between the inner weed frame 114B and the right outer weed frame 114A, Further, the cover body 130 on the left and right outer weeding frames 114A is also guided toward the side of the left and right scavenging devices 242L and 242R, that is, inward.

  When the cereal for each line is guided by each weed frame 114 and reaches the fourth cutting blades 231A to 231D and the auxiliary cutting blade 232 from the first, each cereal is left-side weed frame on the stock side. 114 A and the inner weed frame 114 B are cut by the first cutting blade 231 A, and the inner weed frames 114 B are cut by the second cutting blade 231 B and the third cutting blade 231 C, respectively. Further, the fourth cutting blade 231D and the auxiliary cutting blade 232 are cut between the inner weed frame 114B and the right outer weed frame 114A.

  At this time, the cereals are cut while being sent in the scooping direction of the scoring wheel 243 and the left and right scoring devices 242L and 242R by the first to fourth cutting blades 231A to 231D and the auxiliary cutting blade 232, and Further, the left and right two strips are scraped and bundled together by the respective scraping devices 242L and 242R and the scraping wheel 243. Then, as described above, the sheet is conveyed rearward by the left and right lower transfer devices 246L and 246R of the transfer mechanism 245. In this way, work near the cutting device 23 is performed.

  In such a cutting device 23, as shown in FIGS. 8 and 9, an upper guide body 131 and a lower guide body 132 can be provided on the weeding frame 114. However, even if both the upper guide body 131 and the lower guide body 132 are not provided in the weeding frame 114, only one of them can be provided alone.

  The upper guide body 131 and the lower guide body 132 are paired as a pair, and are provided for one cutting blade 231. The upper guide body 131 is composed of a rod-like body bent at an obtuse angle in the middle, and has a fixed portion 131a at one bent portion and a guide portion 131b at the other bent portion. The lower guide body 132 is composed of a rod-like body bent at an obtuse angle in the middle, and has a fixed portion 132a at one bent portion and a guide portion 132b at the other bent portion. However, the upper guide body 131 and the lower guide body 132 are not limited to rod-shaped bodies, and may be plate materials.

  In the upper guide body 131, the fixing portion 131 a extends in the front-rear direction along the weed frame 114 and is fixed to the rear portion of the weed frame 114 near the front of the corresponding cutting blade 231. The guide part 131b extends obliquely rearward from the fixed part 131a, and is arranged so that the rear end side is located above the cutting blade 231 and in the vicinity of the center of the cutting blade 231.

  In the lower guide body 132, the fixing portion 132 a extends in the front-rear direction along the weed frame 114 and is fixed to the rear portion of the weed frame 114 near the front of the corresponding cutting blade 231. The guide part 132b extends obliquely rearward from the fixed part 132a, and is arranged so that the rear end side is located below the cutting blade 231 and in the vicinity of the center of the cutting blade 231.

  Further, the guide portions 131b and 132b of the upper guide body 131 and the lower guide body 132 extend in the direction of the scrambling of the scoring wheel 243 and the left and right scoring devices 242L and 242R according to the configuration of the scrambling mechanism 241. Is issued.

  Specifically, for example, in the one provided for the first cutting blade 231A, the guide portions 131b and 132b extend from the fixing portions 131a and 132a fixed to the outer weed frame 114A toward the right rearward direction. Is issued. In what is provided with respect to the 2nd cutting blade 231B, each guide part 131b * 132b is extended toward diagonally left back from the fixing | fixed part 131a * 132a fixed to the rear part of the inner weeding frame 114B.

  By providing the upper guide body 131 and the lower guide body 132 in the weed frame 114 as described above, when the weed frame 114 is guided toward the cutting blade 231 side as described above, The body 131 and the lower guide body 132 are further guided from the weeding frame 114 side to the vicinity of the center of the cutting blade 231 and can be cut by the cutting blade 231 while being supported at the upper and lower portions of the cereal. .

  Moreover, in such a cutting device 23, the cutting blade 231 is detachably fixed to the rotational drive shaft 238 from below by an example fixing means as described below. The auxiliary cutting blade 232 is fixed in the same manner as the cutting blade 231.

  The fixing means enables the cutting blade 231 to be attached and detached in a state where the cutting frame 110 is rotated upward, that is, in a state where the cutting unit 20 is raised with respect to the airframe. As shown in FIG. 10, a plurality of bolts 251, nuts 252, a fixed platen 253, and the like are provided.

  The plurality of bolts 251 are arranged on the upper surface side of the cutting blade 231 in a fixed portion provided at the center of the cutting blade 231 and fixed at predetermined intervals in the circumferential direction with respect to the rotation center of the cutting blade 231. Each bolt 251 is a welding bolt or the like, and is fixed to the cutting blade 231 by welding or the like so that the head does not protrude upward as much as possible, while the thread portion penetrates the cutting blade 231 and extends downward from the cutting blade 231. Is projected to.

  The fixed plate 253 is formed in a disk shape with a diameter comparable to that of the fixed portion of the cutting blade 231. The fixed plate 253 is disposed so as to be orthogonal to the axial direction of the rotation drive shaft 238 in a side view, and is fixed to the tip of the rotation drive shaft 238 at the center. The fixed plate 253 is provided with the same number of bolt insertion holes as the bolts 251 at predetermined intervals in the circumferential direction with respect to the rotation center of the fixed plate 253.

  When the cutting blade 231 is fixed, each cutting blade 231 provided with a plurality of bolts 251 first inserts each bolt 251 into a corresponding bolt insertion hole of the fixed plate 253 and places it on the fixed plate 253. Is done. Thereafter, the screw portion of each bolt 251 protruding from the fixed plate 253 side is screwed into the screw hole of the nut 252. As a result, the cutting blade 231 is fastened to the stationary platen 253 at a plurality of locations with the bolts 251 and the nuts 252, and is fixed to the rotary drive shaft 238 via the stationary platen 253.

  On the other hand, when the cutting blade 231 is removed, each nut 252 is loosened in a state where the cutting blade 231 is fixed to the rotary drive shaft 238 via the fixing plate 253 with the bolt 251 and the nut 252, and the corresponding bolt 251 is removed. Thereby, the fastening between the cutting blade 231 and the stationary platen 253 is released, and the cutting blade 231 can be detached from the rotation drive shaft 238. Thus, the cutting blade 231 is detachably fixed to the rotational drive shaft 238 from below by the fixing means.

  Further, in the cutting device 23, the cutting blade 231 can be configured to be detachably fixed to the rotary drive shaft 238 from above by another fixing means as described below. The auxiliary cutting blade 232 is fixed in the same manner as the cutting blade 231.

  This fixing means enables the cutting blade 231 to be attached and detached from above the cutting unit 20 in a state where the cutting frame 110 is rotated downward, that is, in a state where the cutting unit 20 is lowered with respect to the airframe. For example, as shown in FIG. 11, a plurality of bolts 261, nuts 262, fixed plate 263, and the like are provided.

  The fixed plate 263 is formed in a disk shape with a diameter comparable to the fixed portion of the cutting blade 231. The fixed plate 263 is disposed so as to be orthogonal to the axial direction of the rotation drive shaft 238 in a side view, and is fixed to the tip of the rotation drive shaft 238 at the center.

  The plurality of bolts 261 are arranged on the lower surface side of the fixed plate 263 around the fixed portion of the fixed plate 263 with the rotation drive shaft 238, and are fixed at predetermined intervals in the circumferential direction with respect to the rotation center of the fixed plate 263. The Each bolt 261 has its head fixed to the fixed platen 263 by welding or the like, while its threaded portion penetrates the fixed platen 263 and protrudes upward from the cutting blade 231 side.

  Here, the same number of bolt insertion holes as the bolts 261 are provided at predetermined intervals in the circumferential direction with respect to the rotation center of the cutting blade 231 in the fixing portion provided at the center of the cutting blade 231.

  When the cutting blade 231 is fixed, the cutting blades 231 having a plurality of bolt insertion holes are placed on the fixing plate 263 with the bolt insertion holes inserted into the corresponding bolts 261 of the fixing plate 263. . Thereafter, the thread portion of each bolt 261 protruding from the cutting blade 231 side is screwed into the screw hole of the nut 262. As a result, the cutting blade 231 is fastened to the stationary platen 263 at a plurality of locations by the bolts 261 and the nuts 262, and is fixed to the rotary drive shaft 238 via the stationary platen 263.

  On the other hand, when the cutting blade 231 is removed, each nut 262 is loosened and removed while the cutting blade 231 is fixed to the rotary drive shaft 238 via the fixed plate 263 with the bolt 261 and the nut 262. As a result, the fastening between the cutting blade 231 and the stationary platen 263 is released, and the cutting blade 231 can be removed from the rotation drive shaft 238. Thus, the cutting blade 231 is detachably fixed to the rotational drive shaft 238 from above by the fixing means.

  Further, in another example, the fixing means includes a bolt 271 and a support plate 273 as shown in FIGS. 12 (a) and 12 (b).

  The support plate 273 is formed in a disk shape with a diameter similar to that of the fixed portion of the cutting blade 231. A bolt insertion hole is provided at the center of the support plate 273. Further, a bolt insertion hole that can communicate with the bolt insertion hole is provided at a position that coincides with the bolt insertion hole of the support plate 273 of the cutting blade 231, and can communicate with the bolt insertion hole at the center of the rotary drive shaft 238. A screw hole is provided so as to extend downward in the axial direction from the tip surface.

  When the cutting blade 231 is fixed, the cutting blade 231 is first placed on the support board 273 so that the bolt insertion holes are aligned with each other. Thereafter, the bolt 271 is inserted into the cutting blade 231 and the bolt insertion hole of the support board 273 from the upper surface side of the cutting blade 231 and screwed into the screw hole of the rotation drive shaft 238. As a result, the cutting blade 231 is fastened and fixed to the rotary drive shaft 238 by the bolt 251 while being supported by the support plate 273.

  On the other hand, when removing the cutting blade 231, the bolt 271 is loosened and removed from the screw hole of the rotational drive shaft 238 while the cutting blade 231 is fixed to the rotational drive shaft 238 by the bolt 271. As a result, the fastening between the cutting blade 231 and the rotation drive shaft 238 is released, and the cutting blade 231 can be detached from the rotation drive shaft 238. Thus, the cutting blade 231 is detachably fixed to the rotation drive shaft 238 from above by the fixing means.

  Further, when the cutting blade 231 is fixed to the rotary drive shaft 238 as described above, the cereal after cutting is fixed to the bolt 271 of the fixing means that protrudes upward on the upper surface side of the cutting blade 231, and weeds or the like are attached to the cutting blade 231. There is a possibility that a problem arises that the rotary drive shaft 238 exposed to the outside on the lower surface side is caught and wound. Therefore, as a countermeasure for this problem, the following configuration can be applied to the fixing portion of the cutting blade 231.

  For example, as shown in FIG. 12A, an upper collar 276 is provided at the fixed portion on the upper surface side of the cutting blade 231. The upper collar 276 includes a cylindrical body having a trapezoidal shape in a side sectional view having an outer diameter having a small diameter at the upper end side and a large diameter at the lower end side and an inner diameter into which the head of the bolt 271 can be inserted. A disc portion 276a is provided at the opening on the lower end side of the upper collar 276, and a bolt insertion hole is provided at the center of the disc portion 276a.

  When the cutting blade 231 is fixed, the upper collar 276 is placed on the cutting blade 231 so that the bolt holes are aligned with each other. Then, as described above, it is inserted into the bolt insertion hole of the cutting blade 231 and the support plate 273 and screwed into the screw hole 238a of the rotary drive shaft 238. As a result, the upper collar 276 is fixed to the rotary drive shaft 238 together with the cutting blade 231.

  Or as shown in FIG.12 (b), the cap 277 is provided in the fixing | fixed part in the upper surface side of the cutting blade 231. As shown in FIG. The cap 277 is made of a convex body whose upper surface is a spherical surface and whose lower surface is a flat surface, and is made of rubber or the like. A fitting groove 277a that opens downward is formed at the center of the lower surface of the cap 277, and the head of the bolt 271 can be fitted into this fitting groove.

  When the cutting blade 231 is fixed, after the cutting blade 231 is fixed to the rotary drive shaft 238 by the bolt 271 as described above, the fitting groove 277a of the cap 277 is formed on the head of the bolt 271 above the cutting blade 231. The cap 277 is fixed to the cutting blade 231 in close contact with the lower surface.

  By configuring in this way, it is possible to cover the bolt 271 with the upper collar 276 and the cap 277 on the upper surface side of the cutting blade 231 and prevent the cut cereal from being caught by the bolt 271 and wound. . In addition, even if weeds or the like are accumulated on the upper surface of the cutting blade 231, it is possible to prevent them from being wound around the bolt 271. In addition, by making the bolt 271 a hexagon socket head bolt, it is possible to make the head of the bolt 271 as small as possible and to reduce the size of the upper collar 276 and the like.

  Further, as shown in FIG. 12C, a lower collar 278 is provided at the fixed portion on the lower surface side of the cutting blade 231. The lower collar 278 is formed of a cylindrical body having an inner diameter larger than the diameter of the rotary drive shaft 238 and an outer diameter smaller than the inner diameter of the cylindrical second extending portion 115c, and is made of rubber or resin. A fitting portion 278a having an outer diameter substantially the same as the inner diameter of the second extending portion 115c is provided on the lower end side of the lower collar 278, and an outer diameter larger than the outer diameter of the second extending portion 115c is provided on the upper end side. A hook-shaped contact portion 278b having a ridge is provided.

  When the cutting blade 231 is fixed, before the cutting blade 231 is fixed to the rotation drive shaft 238, the lower collar 278 is fitted onto the rotation drive shaft 238, and in this state, the insertion portion 278a is fitted to the second extension portion 115c. The abutment portion 278 b is abutted against the cutting blade 231 fixed to the rotation drive shaft 238. In this example, the above-described support plate 273 is not included in the fixing means.

  With this configuration, on the lower surface side of the cutting blade 231, the lower drive shaft 238 is covered and hidden by the lower collar 278, and in particular, the gap between the lower collar 278 and the cutting blade 231 is eliminated at the contact portion 278 b, and weeds And the like can be prevented from being caught around the rotary drive shaft 238 and wound. In addition, since the lower collar 278 is made of rubber or resin, it is possible to prevent abnormal wear of the cutting blade 231 that abuts on the abutment portion 278b and to prevent unnecessary power consumption.

  As described above, the harvesting unit 20 of the combine 1 according to the embodiment of the present invention causes the weeding tool 21 for weeding the cereal and the multiple culms that are weeded by the weeding tool 21. A device 22, a cutting device 23 for cutting a plurality of grain culms caused by the pulling device 22, a conveying device 24 for conveying the cereals cut by the cutting device 23 to the threshing unit 30 side, and a weeding tool 21 The cutting device 23 includes a plurality of disk-shaped cutting blades 231 that cut the grain culm on the stock side so as to be rotationally driven. The cutting blades 231 are arranged in substantially the same straight line in the left-right direction, and a transmission mechanism that transmits power from the actuator 233 as a driving source to the plurality of cutting blades 231 is disposed below these cutting blades 231, Included in transmission mechanism The horizontal drive shaft 237 extends in the left-right direction, and a plurality of rotary drive shafts 238 included in the transmission mechanism extend upward from the horizontal drive shaft 237, and a cutting blade 231 is provided at the tip of each rotary drive shaft 238. It is comprised so that it may provide.

  Thereby, the vibration and noise which generate | occur | produce from the cutting device 23 can be reduced. In addition, the transmission mechanism that interlocks and connects the cutting blade 231 and the actuator 233 can be simplified to simplify the cutting device. Furthermore, it is possible to prevent the cereal cake after cutting from being wound around a part of the transmission mechanism.

  Further, the cutting unit 20 of the combine 1 is configured so that the cutting device 23 lays the drive pipe 115 that covers and supports the vertical drive shaft 236 horizontally in the left and right directions below the plurality of cutting blades 231, The end portion is connected to the cutting frame 110, that is, the outer weed frame 114A, and the drive pipe 115 and the outer weed frame 114A are integrated.

  Thereby, the structure of the cutting frame 23 which supports the cutting device 23 and the cutting device 23 can be simplified by simplifying the support structure of the plurality of cutting blades 231 and thus the cutting device 23 with respect to the cutting frame 110. Further, the strength of the entire cutting frame 110 can be improved by the drive pipe 115.

  Further, the cutting unit 20 of the combine 1 is provided so that the cutting frame 110 can be rotated in the vertical direction with respect to the machine body, and the cutting device 23 attaches and detaches the plurality of cutting blades 231 to the rotary drive shaft 238 from below by a fixing means. Configured to fix possible.

  This makes it possible to easily attach and detach the cutting blade 231 from below the cutting device 23 without removing another member from the cutting frame 110 when the cutting frame 110 is rotated upward. Therefore, maintenance and the like can be easily performed.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 has a plurality of disk-shaped cutting blades 231 for cutting the cereals on the stock side and a smaller diameter than the cutting blades 231, The disk-shaped auxiliary cutting blades 232 that are cut in the above-described manner are rotatably driven, and a plurality of cutting blades 231 are arranged on the substantially same straight line in the left-right direction, and the auxiliary cutting blades 232 are arranged on the plurality of cutting blades 231. Among these, it is configured to be arranged on the outer side of one of the left and right cutting blades 231 located on the outermost side.

  Thereby, the vibration and noise which generate | occur | produce from the cutting device 23 can be reduced. In addition, even if the cutting width of the cutting device 23 varies depending on the type of the cutting unit 20, the cutting width of the cutting device 23 can be adjusted by changing only the auxiliary cutting blade 232 to one having an appropriate diameter. Thus, the cutting blade 231 can be used as it is. Therefore, the cutting blade 231 can be shared in the cutting unit 20 regardless of the cutting width of the cutting device 23, and the configuration of the cutting device 23 can be simplified.

  In addition, the cutting unit 20 of the combine 1 is provided with one cutting blade 231 for a single grain culm, with the cutting device 23 having the same number of cutting blades 231 as the number of grain ridges caused by the pulling device 22. Configured as follows.

  Thereby, the cutting blade 231 can be easily installed, and the necessary auxiliary cutting blade 232 according to the cutting width of the cutting device 23 can be easily selected.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 has an auxiliary cutting blade 232 in addition to one cutting blade 231 for the left and right one line located on the outermost side of the culm caused by the pulling device 22. It is comprised so that it may provide.

  Thereby, adjustment of the cutting width of the cutting device 23 by the auxiliary cutting blade 232 can be easily performed.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 has a plurality of disk-shaped cutting blades 231 for cutting the cereals on the stock side and a smaller diameter than the cutting blades 231, And a plurality of cutting blades 231 and an actuator 233 that rotationally drives the auxiliary cutting blades 232, and the plurality of cutting blades 231 and the auxiliary cutting blades 232 are approximately left and right. It is configured to be arranged side by side on the same straight line.

  Thereby, the vibration and noise which generate | occur | produce from the cutting device 23 can be reduced. In addition, the plurality of cutting blades 231 can be driven to rotate at a rotational speed necessary for cutting the cereal regardless of the operation state of the engine of the combine 1, and the cereal can be reliably cut. Therefore, stabilization of the cereal cutting performance can be achieved.

  In addition, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 places the actuator 233 behind the auxiliary cutting blade 232.

  Thereby, the space generated behind the auxiliary cutting blade 232 can be effectively used, and the actuator 233 can be disposed in the cutting device 23 in a compact manner. It is possible to simply configure a transmission mechanism in which the actuator 233 serving as a drive source is placed close to the cutting blade 231 and the auxiliary cutting blade 232 and interlocked with each other.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 can rotate and drive the plurality of cutting blades 231 and the auxiliary cutting blades 232 at a constant rotational speed by the actuator 233.

  Thereby, the cereal after raising can be cut | disconnected reliably with the some cutting blade 231 and the auxiliary | assistant cutting blade 232. FIG.

  Further, the harvesting unit 20 of the combine 1 includes a plurality of scoring wheels, the transport device 24 being rotatably provided with a plurality of scoring wheels 243 that scrape the cereals caused by the pulling device 22 into the threshing unit 30 side. 243 are arranged on the substantially same straight line in the left-right direction, and the cutting device 23 arranges a plurality of cutting blades 231 below each of the scooping wheels 243, and is driven to rotate in the same rotational direction as the scooping wheels 243. Configured to allow.

  As a result, the raised cereal can be smoothly cut and transported by the cutting blade 231 in accordance with the scraping direction of the scraping wheel 243, that is, the transporting direction of the transporting device 24.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 can rotationally drive adjacent cutting blades 231 among the plurality of cutting blades 231 in mutually different rotation directions.

  Thereby, like this embodiment, when the rotation direction of the adjacent cutting blade 231 is set according to the scrambling direction of the scraping wheel 243, the cereal after the pulling is set with the cutting blade 231. Can be cut and transported smoothly in accordance with the direction of scraping, that is, the transport direction of the transport device 24. Moreover, the disorder | damage | failure of the stockholder side of a grain straw can be reduced at the time of a grain straw cutting.

  Further, in the cutting unit 20 of the combine 1, the cutting device 23 arranges the auxiliary cutting blade 232 outside the one of the cutting blades 231 located on the outermost side among the plurality of cutting blades 231, and the auxiliary cutting blade 232. The auxiliary cutting blade 232 and the adjacent cutting blade 231 can be driven to rotate in the same rotational direction.

  As a result, it is possible to smoothly cut and raise the cereal after pulling in accordance with the auxiliary cutting blade 232 in accordance with the direction in which the picking wheel 243 is driven, that is, the direction in which the transfer device 24 is transferred.

  Further, the cutting unit 20 of the combine 1 is configured such that the cutting device 23 can be driven by switching the actuator 233 in the normal rotation direction or the reverse rotation direction.

  Thereby, when the actuator 233 is driven in one direction, even if the cutting state of the cutting blade 231 is deteriorated and the cereal cutting performance is deteriorated, the actuator 233 is driven in the reverse direction to thereby reduce the cereal cutting performance. Can be revived.

  In addition, the harvesting unit 20 of the combine 1 includes a plurality of scraping wheels 243 that are capable of rotationally driving the plurality of scraping wheels 243 that scrape the culm caused by the pulling device 22 and transport it to the threshing unit 30 side. The insert wheels 243 are arranged in substantially the same straight line in the left-right direction, and the pulling device 22 side is lowered and the threshing portion 30 side is raised, that is, arranged in a slanted form at the front and rear, and the cutting device 23 A plurality of disk-shaped cutting blades 231 that are cut on the stock side are provided so as to be rotationally driven, and a plurality of cutting blades 231 are arranged in substantially the same straight line in the left-right direction. It is arranged so that the pulling device 22 side is lowered and the threshing portion 30 side is raised, that is, in a slanting manner in front and rear and rear heights, and the degree of inclination of the plurality of cutting blades 231 with respect to the ground is Degree of inclination of wheel 243 with respect to the ground Iyori be configured to set slowly.

  Thereby, the vibration and noise which generate | occur | produce from the cutting device 23 can be reduced. Moreover, it becomes possible to transport the cereal after cutting to the threshing unit 30 side so as to be separated from the cutting blade 231 by the scraping wheel 243, and it is possible to prevent the cereal after cutting from contacting the cutting blade 231. . Therefore, it is possible to prevent the occurrence of a problem related to conveyance such as the stock source being chopped or the stock source being disturbed by the contact of the cereal, thereby improving the cereal transport performance.

  Further, the cutting unit 20 of the combine 1 includes a horizontal transmission pipe 113 that extends in the left-right direction behind the cutting device 23, and the cutting frame 23 includes the horizontal transmission pipe 113 on the threshing unit 30 side from the plurality of cutting blades 231. And it is comprised so that it may arrange | position below the extension line in the side view to the threshing part 30 side of the some cutting blade 231. FIG.

  Thereby, the cut cereal can be prevented from being entangled with the horizontal transmission pipe 113 and can be smoothly conveyed to the threshing portion 30 side by the take-in wheel 243.

  Further, the cutting unit 20 of the combine 1 includes a cutting frame 110 that covers a plurality of cutting blades 231 from the left and right outer sides, and the left and right cutting blades located on the outermost side of the cutting blades 231. It is comprised so that it may provide in the part located in the outer side of 231.

  Thereby, it can prevent that an uncut grain entanglement gets entangled with a part of cutting device 23 and the cutting frame 110 from the outside, and obstructs conveyance of the grain cut after cutting. In addition, the cutting blade 231 can be reliably protected from the outside by the cover body 130. In addition, it is possible to prevent stones and the like repelled by the cutting blade 231 from jumping out of the cutting device 23, thereby preventing surrounding people and objects from being damaged.

  In addition, the cutting unit 20 of the combine 1 includes a plurality of weeding frames 114 in which the cutting frame 110 is provided with the weeding tool 21 at the tip, and the threshing unit 30 is provided below the cutting device 23 with the plurality of weeding frames 114. The cutting device 23 is provided with a plurality of disc-shaped cutting blades 231 that cut the cereals on the stock side. The plurality of cutting blades 231 are arranged on the substantially same straight line in the left-right direction so that each cutting blade 231 is positioned between the weeding frames 114 in a plan view, and the cutting blades 231 adjacent to each other are cut. The blades 231 are arranged so as to be spaced apart from each other by a left-right width of the weeding frame 114.

  Thereby, the vibration and noise which generate | occur | produce from the cutting device 23 can be reduced. In addition, the cedar after raising can be guided to the cutting blade 231 by the weeding frame 114 and smoothly cut by the cutting blade 231. In addition, the cutting blade 231 can be protected from the lower side by the weeding frame 114. Therefore, the weed frame 114 can be used as a guide body that guides the cedar after raising to the cutting blade 231 and a protective body that protects the cutting blade 231, and the configuration of the cutting device 23 can be simplified. Moreover, since it is not necessary to arrange the adjacent cutting blades 231 in an overlapping manner, the cutting blades 231 can be downsized.

  In addition, the cutting unit 20 of the combine 1 includes a cutting frame 110 including a plurality of weeding frames 114, the left and right outer weeding frames 114A located on the outermost side, and the inner weighing frame 114A adjacent to the outer weeding frame 114A. The distance between the grass frames 114B is set larger than the distance between the other weed frames 114, and the cutting device 23 is configured to have a smaller diameter than the cutting blade 231, and is a single disk that cuts the cereals on the stock side. The auxiliary cutting blade 232 having a shape is rotatably provided, and the auxiliary cutting blade 232 is arranged between the outer weed frame 114A and the inner weed frame 114B so as to partially overlap with the cutting blade 231. The

  As a result, the cutting width of the cutting device 23 can be adjusted by the auxiliary cutting blade 232, and the raised culm can be reliably cut by the cutting blade 231 and the auxiliary cutting blade 232 even in this adjustment portion. The auxiliary cutting blade 232 can be protected from the lower side by the outer weed frame 114A.

  In addition, the cutting unit 20 of the combine 1 is configured such that the cutting frame 110 is configured to guide the upper guide body 131 that guides the culm caused by the pulling device 22 from the weeding frame 114 side to the vicinity of the center of the cutting blade 231. It is configured to be provided on the weeding frame 114 so as to extend upward from the front of the H.231.

  Thereby, it becomes possible to cut | disconnect by the cutting blade 231, guiding and supporting the cedar after raising by the upper guide body 131, and can aim at the improvement of cereal cutting performance. In addition, weeds, dust and the like riding on the cutting blade 231 can be scraped off by the upper guide body 131.

  In addition, the cutting unit 20 of the combine 1 is configured such that the cutting frame 110 includes a lower guide body 132 that guides the cereals caused by the pulling device 22 from the weeding frame 114 side to the vicinity of the center of the cutting blade 231. It is configured to be provided on the weeding frame 114 so as to extend downward from the front of the H.231.

  Thereby, it becomes possible to cut | disconnect by the cutting blade 231, guiding and supporting the cereal after the raising with the lower guide body 132, and can aim at the improvement of the cereal cutting performance. Furthermore, the cutting blade 231 can be protected from the lower side by the lower guide body 132. Further, by providing the lower guide body 132 in addition to the upper guide body 131, it is possible to prevent the cereal cake after being raised from bending or entering below the cutting blade 231. Can be cut effectively.

The left view which shows the whole combine structure which has a cutting part which concerns on one Embodiment of this invention. The left view which shows the structure of a cutting part. The top view which shows the structure of a cutting part. The top view which shows the structure of a cutting device. The left view which shows the structure of a cutting device. The top view which shows the structure of the drive system of a cutting device. The fragmentary sectional view which shows the structure of the drive system of a cutting device. The top view which shows the structure of the cutting device vicinity at the time of providing an upper guide body and a lower guide body. The partial cross section side view which shows the structure of the cutting device vicinity at the time of providing an upper guide body and a lower guide body. Sectional drawing which shows the structure of the fixing structure of the cutting blade in the case of using an example fixing means. Sectional drawing which shows the structure of the fixing structure of the cutting blade at the time of using the fixing means of another example. Sectional drawing which shows the structure of the fixing structure of the cutting blade at the time of using the fixing means of another example. (A) The figure which shows the state which provided the upper collar. (B) The figure which shows the state which provided the cap. (C) The figure which shows the state which provided the lower collar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 20 Mowing part 21 Weeding tool 22 Pulling device 23 Cutting device 24 Conveying device 30 Threshing part 110 Mowing frame 113 Lateral transmission pipe 114 Weeding frame 114A Outer weeding frame 114B Inner weeding frame 115 Drive pipe 130 Cover body 131 On Guide body 132 Lower guide body 231 Cutting blade 231A First cutting blade 231B Second cutting blade 231C Third cutting blade 231D Fourth cutting blade 232 Auxiliary cutting blade 233 Actuator 236 Vertical drive shaft 237 Horizontal drive shaft 238 Rotation drive shaft 243 Scratching ring

Claims (3)

Weeding tools for weeding cereals,
A pulling device that causes a plurality of cereals that have been weeded by the weeding tool;
A cutting device for cutting a plurality of cereal grains caused by the pulling device;
A transport device for transporting the cereals cut by the cutting device to the threshing unit side;
A harvesting unit for a combine, comprising the weeding tool and a harvesting frame that supports each of the devices,
The cutting device is
A plurality of disk-shaped cutting blades that cut the cereals on the stock side are provided so as to be able to rotate,
A plurality of the cutting blades are arranged side by side on substantially the same straight line in the left-right direction,
A transmission mechanism that transmits power from a drive source to the plurality of cutting blades is disposed below the cutting blades,
While extending the drive shaft included in the transmission mechanism in the left-right direction,
Extending a plurality of rotational drive shafts included in the transmission mechanism upward from the drive shaft;
A combine harvester, wherein the cutting blade is provided at the tip of each rotary drive shaft. The cutting device is
A drive pipe that covers and supports the drive shaft is horizontally provided in the left-right direction across the plurality of cutting blades,
Connecting the left and right ends of the drive pipe to the cutting frame;
The combine cutting part according to claim 1, wherein the drive pipe and the cutting frame are integrally formed. The cutting frame is
It is provided so that it can rotate in the vertical direction with respect to the aircraft,
The cutting device is
The combine cutting part according to claim 1 or 2, wherein the plurality of cutting blades are fixed to the rotary drive shaft so as to be detachable from below by fixing means.

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