JP2017086022A - Combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly perform shred processing even when processing amount of thrown-in waste straw is different.SOLUTION: A combine-harvester comprises: a thresher 4 which applies threshing treatment by charging whole reaped grain culms thereinto; and a waste straw shred processing device 38. The waste straw shred processing device 38 comprises: a plurality of rotary blades 41 which are arranged in the outer circumference of a rotator rotating around a lateral shaft core being aligned at prescribed intervals apart in the shaft core direction and extended radially to rotate integrally with the rotator; and a plurality of fixed blades 42 which are arranged being aligned at prescribed intervals apart in the shaft core direction and overlapped with the rotary blades 41 in the side view; and a fixed blade adjustment mechanism 52 which can change over to any of a plurality of changeover positions having different overlapping degrees between the fixed blades 42 and the rotary blades 41 in a cutting action state that the fixed blades 42 are overlapped with the rotary blades 41 in the side view.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a combine that is configured such that all of the harvested cereal meal is put into a threshing apparatus, and the waste straw after the threshing process discharged from the threshing apparatus is shredded by the waste straw shredding device.

  The combine is configured such that the waste straw shredding device is provided behind the threshing device, and the waste straw discharged from the rear end of the threshing device is shredded and discharged to the field. The drainer shredding device includes a plurality of rotary blades that rotate around a horizontal axis and a plurality of fixed blades in a fixed position in order to shred the drainer. And, conventionally, there has been one that is configured to switch the posture of the fixed blade between a protruding position that protrudes above the guide plate that guides the drainer and a retracted position that retracts below the guide plate (for example, Patent Document 1).

JP-A-8-60

  In the above-described conventional configuration, the fixed blade is always held at the protruding position in a cutting action state where the fixed blade and the rotary blade overlap with each other, and thus has the following disadvantages.

  As long as the protruding position is set to a position where the degree of overlap with the rotary blade is large, the advantage that the shredding process can be properly performed even when the processing amount of the waste straw to be thrown in is small. However, if the processing amount of the waste straw increases, the waste straw may clog between the rotating blade and the fixed blade, and the shredding process may not be performed properly. On the other hand, if the protrusion position is set to a position where the degree of overlap with the rotary blade is small, the risk of clogging of the exhaust wall between the rotary blade and the fixed blade is reduced, but it is inserted. When the amount of waste straw to be processed is small, the waste wall cutting function by the rotary blade and the fixed blade is not sufficiently exhibited, and there is a possibility that the shredding processing cannot be performed properly.

  Therefore, it has been desired that the shredding process can be appropriately performed regardless of the difference in the processing amount of the discharged waste straw.

The characteristic configuration of the combine according to the present invention is as follows:
A reaping part for reaping planted cereals, a threshing device for threshing the harvested cereal culm when all of the reaped cereals are thrown in, and a shredder after the threshing process discharged from the threshing device An exhaust wall shredding device
The draining shredder is
A rotating body provided in a state extending along the lateral direction and rotating around a lateral axis;
A plurality of rotary blades that are provided on the outer peripheral portion of the rotating body in a state of being arranged radially with a space along the axial direction of the rotating body and extending radially, and rotate integrally with the rotating body;
A plurality of fixed blades provided in a state where they are arranged at intervals along the axial direction and overlap with the rotary blades in a side view;
A fixed blade adjustment mechanism capable of switching the fixed blade to one of a plurality of switching positions having different degrees of overlap with the rotary blade in a cutting action state where the fixed blade overlaps with the rotary blade in a side view. There is in point.

  According to the present invention, the waste straw shredding device includes a plurality of rotary blades and a plurality of fixed blades while the rotary blade rotates and the waste straw discharged from the threshing device is scraped with the rotation of the rotating body. Shred finely by collaboration. And when the processing amount of the waste straw to be thrown in is small, the fixed blade adjustment mechanism can perform the processing with the fixed blade being switched to the switching position where the degree of overlap with the rotary blade is large. On the other hand, when the processing amount of the waste straw is large, the processing can be performed in a state where the fixed blade is switched to the switching position where the overlapping degree with the rotary blade is small by the fixed blade adjusting mechanism.

  Therefore, it is possible to switch the position of the fixed blade according to the processing amount of the waste straw to be introduced, and to perform the shredding processing properly regardless of the difference in the processing amount of the waste straw. .

  In the present invention, the fixed blade adjusting mechanism supports each of the plurality of fixed blades arranged in the axial direction and is supported by the frame body so as to be rotatable around the horizontal axis. It is preferable that the fixed blade is switched to one of the plurality of switching positions by rotating the fixed blade support member.

  According to this configuration, when the fixed blade support member is rotated, the plurality of fixed blades are integrally rotated around the horizontal axis so as to be switched to one of the plurality of switching positions. Only by rotating the fixed blade support member, the plurality of fixed blades can be switched at once, and there is no trouble of switching the postures of the plurality of fixed blades separately, and the work efficiency is improved.

  In the present invention, it is preferable that the fixed blade adjustment mechanism is capable of switching the fixed blade to the plurality of switching positions and fixing the position of the fixed blade at each of the plurality of switching positions. .

  According to this configuration, the fixed blade can fix the position at each of a plurality of switching positions having different degrees of overlap with the rotary blade. For example, in a configuration in which the fixed blade is held in position by friction, the fixed blade may be displaced as the shredding process is performed. In contrast, in this configuration, there is no disadvantage that the fixed blade will be displaced as the shredding process is performed regardless of the switching position, and a good shredding state is maintained for a long time. It becomes possible to do.

  In the present invention, it is preferable that the fixed blade adjusting mechanism is configured to be able to switch the fixed blade to a non-operating position that does not overlap with the rotary blade in a side view and to be fixed to the non-operating position. is there.

  According to this configuration, when the fixed blade is switched to the non-operating position, it does not overlap with the rotary blade in a side view. The waste straw can be discharged as it is without being shredded. For example, it is possible to deal with cases where it is not necessary to cut the waste straw, or when there is a possibility that the waste straw will stay if there is a large amount of moisture and there is a fixed blade. Since the fixed blade can be fixed at the non-operating position, it can be avoided that the fixed blade is erroneously switched to the protruding state by vibration or the like during the operation.

In the present invention,
The fixed blade support member has a maximum overlap position where the overlap degree between the fixed blade and the rotary blade is the maximum, and a minimum position where the overlap degree is the smallest and located on the lower side in the discharge wall transport direction than the maximum overlap position. The posture can be changed over the overlapping position,
The fixed blade adjustment mechanism is
An urging mechanism for urging and moving the fixed blade support member toward the maximum overlapping position;
The fixed blade support member moves toward the minimum overlapping position against the urging force of the urging mechanism as the processing amount of the thrown-out waster thrown increases, so that the overlapping degree changes sequentially. It is preferable to be configured.

  According to this configuration, the fixed blade support member is moved and urged toward the maximum overlap position by the urging mechanism. Therefore, the fixed blade support member is positioned at the maximum overlap position in a state in which the drainer is not inserted. The plurality of fixed blades are also located at corresponding switching positions. When the amount of waste brazing increases, the load associated with the shredding process is applied to the fixed blade, and the fixed blade support member moves toward the minimum overlapping position against the urging force of the urging mechanism. As the amount of processing increases, the fixed blade support member becomes closer to the minimum overlapping position.

  As a result, when the processing amount of the waste straw to be introduced is small, the processing can be performed in a state where the fixed blade is switched to the switching position where the overlapping degree with the rotary blade is large, and the processing amount of the waste straw is large. In some cases, the processing can be performed in a state where the fixed blade is switched to the switching position where the overlapping degree with the rotary blade is small.

It is a whole side view of a combine. It is a whole top view of a combine. It is a side view of a threshing device rear part and a waste straw shredding device. It is a vertical side view of a rear part of a threshing device and a waste straw shredding device. It is a cross-sectional top view of a threshing apparatus rear part and a waste straw shredding apparatus. It is a front view of the state which unfolded the rotating body which shows the attachment state of a rotary blade. It is a perspective view which shows the attachment state of a rotary blade. It is a side view of a fixed blade adjustment mechanism. It is a vertical side view which shows the support structure of a fixed blade. It is a vertical rear view of a fixed blade adjustment mechanism. It is a disassembled perspective view of a fixed blade adjustment mechanism. It is sectional drawing of a rotary blade. It is an expanded sectional view of a blade part. It is sectional drawing of the rotary blade of another embodiment. It is a side view of the fixed blade adjustment mechanism of another embodiment.

  Hereinafter, embodiments of a combine according to the present invention will be described with reference to the drawings.

  In this embodiment, when defining the front-rear direction of the aircraft, it is defined along the aircraft advancing direction in the working state, and when defining the left-right direction of the aircraft, the left-right direction is defined as viewed in the aircraft advancing direction. . That is, the direction indicated by the reference symbol (F) in FIGS. 1 and 2 is the front side of the aircraft, and the direction indicated by the reference symbol (B) in FIGS. The direction indicated by reference sign (L) in FIG. 2 is the left side of the aircraft, and the direction indicated by reference sign (R) in FIG.

〔overall structure〕
FIG. 1 and FIG. 2 show a normal combine that harvests crops such as rice and wheat. This combine harvester conveys planted cereals as crops to be harvested to the front of a traveling machine equipped with a pair of left and right crawler type traveling devices 2 at the lower part of the machine frame 1 and conveys them backward. 3 is connected so as to be swingable up and down. The traveling machine body on the machine body frame 1 is a threshing device 4 for threshing the harvested cereal as a crop conveyed from the harvesting and conveying unit 3, a grain tank 5 for storing the grains obtained by the threshing device 4, A grain discharging device 6 for discharging grains stored in the grain tank 5 to the outside of the machine, a driving unit 7 on which a driver gets on and performs a driving operation are provided.

  The operation unit 7 is located on the right side of the front part of the machine body, and a grain tank 5 is provided behind the operation unit 7. A driving engine 8 is provided below the operation unit 7. In the traveling machine body, the threshing device 4 and the grain tank 5 are arranged in the left-right direction with the threshing device 4 positioned on the left side and the grain tank 5 positioned on the right side.

  This combine is configured as a full-pile-feeding type in which the planted cereal culm is cut and harvested, and all the harvested cereal culm is put into the threshing device 4.

  The cutting and conveying unit 3 includes a cutting unit 9 that harvests the planted cereal as the machine travels, and a feeder 10 that conveys the harvested cereal that has been harvested by the cutting unit 9 toward the threshing device 4 on the rear side of the aircraft. The hydraulic cylinder 11 for cutting up and down extending over the body frame 1 and the feeder 10 is extended and retracted so that it can be swung up and down around the horizontal axis P1.

  The harvesting unit 9 includes a pair of left and right dividers 13 for weeding a planted cereal to be harvested and a planted sorghum to be harvested, and a rotating reel that scrapes the planted cereal to be harvested backwards. 14, a clipper-shaped cutting blade 15 that cuts and harvests the planted side of the planted cereal to be harvested, and the cut cereal after cutting is laterally fed to the intermediate side in the left-right direction and gathered and directed backwards And an auger 16 for feeding out.

  As shown in FIG. 1, the feeder 10 includes a pair of left and right pairs in a rectangular tube-like feed case 17 that extends across a driving wheel body 18 located on the rear upper side and a driven wheel body 19 located on the front lower side. An endless rotating chain 20 is wound, and a locking conveyance body 20a (see FIG. 1) is installed over a pair of left and right endless rotating chains 20 at a predetermined pitch. An inlet communicating with the cutting unit 9 is formed at the front end of the feed case 17, and the rear end of the feed case 17 is connected to the threshing device 4. Then, the endless rotating chain 20 is rotated to convey the harvested crop (cutted potato cake) delivered from the cutting unit 9 toward the threshing device 4.

[Threshing equipment]
Next, the threshing apparatus 4 will be described.

  As shown in FIGS. 1 and 4, the threshing device 4 is provided with a handling chamber 21 at the top, and is configured such that the whole of the harvested cereal meal is conveyed by the feeder 10 and supplied into the handling chamber 21. The handling chamber 21 is provided with a handling cylinder 22 that is driven to rotate around a horizontal axis X1 that faces the machine body in the front-rear direction and handles the crop. The handling cylinder 22 is rotatably supported around the longitudinal axis X1 by a handling cylinder shaft 23 facing the front and rear of the machine body, and is configured to rotate integrally around the handling cylinder axis 23. The handling cylinder 22 is provided with a plurality of support rods 24 that are dispersed and arranged at equal intervals in the circumferential direction of the handling barrel 22, and is bar-shaped that protrudes from the plurality of locations aligned in the axial direction of each support rod 24 to the outer peripheral side of the handling drum 22. The teeth 25 are provided.

  A semi-cylindrical receiving net 26 is provided on the lower half of the outer peripheral portion of the handling cylinder 22. As shown in FIG. 3, the receiving net 26 connects a large number of arc-shaped horizontal rails 27 and vertical rails 28 along the axial direction connecting the horizontal rails 27, so that grains pass therethrough. It is composed of a known structure having a large number of passage holes.

  As shown in FIGS. 1 and 4, a sorting unit 29 is provided below the handling chamber 21. The sorting unit 29 includes an oscillating sorting device 30 that sorts the processed material that has leaked downward from the receiving net 26, and a tang (not shown) that supplies sorting wind toward the rear of the machine body. Yes. As shown in FIGS. 4 and 5, the swing sorting device 30 includes a sheave case 31 that is formed in a rectangular frame shape in plan view and swings back and forth, and a chaff sheave 32 for coarse sorting is provided in the sheave case 31. A grain sieve 33 for grain selection, a Strollac 34, and the like are provided. The sheave case 31 is supported by the side wall 4A of the threshing device 4 so that the front side of the machine body is slidable in the front-rear direction, and the rear side of the machine body is rocked by a crank-type rocking drive unit 35.

  In the swing sorting device 30, the sheave case 31 swings in the front-rear direction, and sorts the processed material leaked from the receiving net 26 into grains and waste straw scraps while swinging and moving backward. The grain obtained by sorting is conveyed by the grain conveying device 36 (see FIG. 2) and stored in the grain tank 5. Waste waste debris is discharged rearward and outwardly from a dust outlet 37 at the rear of the machine body.

[Drainer shredder]
In the lower part of the rear end of the threshing device 4, there is provided a waste straw shredding device 38 that shreds the waste straw discharged from the dust outlet 37 with the threshing process and discharges it outside the machine.

  As shown in FIGS. 4 and 5, the waste straw shredding device 38 is provided in a state extending along the lateral direction in the space covered by the waste straw cover 39 connected to the lower rear end of the threshing device 4. A rotating body 40 that rotates about a laterally oriented axis P4; and a rotating body that is arranged on the outer periphery of the rotating body 40 in a state of being arranged radially at intervals along the axial center direction of the rotating body 40. A plurality of rotary blades 41 that rotate integrally with 40, and a plurality of fixed blades 42 that are arranged in a state of being spaced apart along the axial direction and overlapping the rotary blades 41 in a side view. .

  The rotating body 40 extends over the lateral cover portions 39a on both the left and right sides of the exhaust wall cover 39, and the shaft support portions 43 on the left and right sides are provided around the lateral axis P4 by the bearing portions 44 provided on the left and right lateral cover portions 39a. It is supported so that it can rotate freely. As shown in FIG. 7, disk-shaped large-diameter plate portions 45 are provided on the left and right sides of the rotating body 40, and bolts 46 are attached to the large-diameter plate portions 45 at appropriate locations in the circumferential direction. The weight balance is adjusted so that the runout due to rotation is reduced.

  As shown in FIG. 12, the rotary blade 41 is formed in a band plate shape, and double-edged blade portions 41a are formed on both side surfaces. As shown in FIG. 13, the tip portion of the blade portion 41a does not have a sharp shape, but forms a tip blade tip 41b having a gentle shape at the tip portion. The durability is improved by adopting such a shape.

  As shown in FIGS. 5 to 7, the base member 47 is integrally fixed to the outer peripheral portion of the rotating body 40 so as to project radially. The base end portion of the rotary blade 41 is sandwiched between the base member 47 and the presser plate 48 and is fixed by a bolt 49 through which they are inserted. Therefore, the rotary blade 41 is attached to the rotating body 40 in a state where the blade portion 41a is located radially outward and extends radially and rotates integrally.

  The rotary blade 41 has a phase angle of 90 degrees or 108 degrees (90 degrees + 18 degrees) when the rotary blade 41 adjacent to the longitudinal direction of the rotating body 40 is viewed in the axial direction (left-right direction) of the rotating body 40. It is arranged to become. When the explanation is added, the second, third, and fourth rotary blades 41 from the leftmost rotary blade 41 to the right side have a phase angle of 90 degrees. The fourth rotation blade 41 to the fifth rotation blade 41 have a phase angle of 108 degrees. From the fifth rotary blade 41 to the sixth, seventh, and eighth rotary blades 41, the phase angle is 90 degrees. From the eighth rotary blade 41 to the ninth rotary blade 41, the phase angle is 108 degrees. Similarly, the 10th and subsequent ones have a phase angle of 108 degrees every four units, and the other phase angles are 90 degrees. In short, the plurality of rotary blades 41 are arranged in a spiral arrangement on the outer peripheral portion of the rotating body 40, and the twisting state of the spiral changes in the middle of the axial direction.

  As shown in FIG. 4, the rotary blade 41 is provided such that the tip rotation locus L of the rotary blade 41 enters the threshing device 4. The waste straw cover 39 of the waste straw shredding device 38 is provided in a state of being connected to the rear side of the rear wall 4B of the threshing device 4. The rotary blade 41 is positioned so as to enter from the rear end portion of the threshing device 4 toward the front side of the machine body in a side view.

  As shown in FIG. 4, a bottom guide body 50 is provided below the rotary blade 41 so as to substantially follow the tip rotation locus L of the rotary blade 41. The bottom guide body 50 extends over the lateral cover portions 39 a on both the left and right sides of the drain wall cover 39. A plurality of fixed blades 42 are mounted on the bottom guide body 50 in a state of being arranged at intervals along the axial direction.

  The rear portion of the threshing device 4 is provided with receiving guide plates 51 in a downwardly inclined posture for receiving the waste straw after the threshing treatment and guiding it toward the waste straw shredding device 38 over the left and right side wall portions 4A. Yes. The receiving guide plate 51 is provided in a state where the rear end portion thereof is continuous with the front end portion of the bottom guide body 50. Therefore, the receiving guide plate 51 on the threshing device 4 side and the bottom guide body 50 of the draining shredder 38 form a smooth rear-falling guide surface.

  The rotary blade 41 is provided so that the front side portion of the tip rotation locus L is located immediately above the receiving guide plate 51. The receiving guide plate 51 is provided in a rearward downward inclined posture that substantially follows the tip rotation locus L. Furthermore, the upper end position Lh of the tip rotation locus L of the rotary blade 41 is located above the lower end position (position shown in FIG. 4) of the receiving net 26.

  By arranging the rotary blade 41 in this way, before the waste straw discharged backward from the handling chamber 21 is received by the receiving guide plate 51 or soon after being received by the receiving guide plate 51. The shredding process is easily performed by the scraping action by the rotary blade 41. As a result, there is less possibility that the waste straw stays on the receiving guide plate 51, and the waste straw can be shredded smoothly.

  A bottom guide body 50 is provided below the rotary blade 41 so as to substantially follow the tip rotation locus L. A plurality of fixed blades 42 are mounted on the bottom guide body 50 in a state of being arranged at intervals along the axial direction. In a cutting action state where the fixed blade 42 overlaps the rotary blade 41 in a side view, a fixed blade adjustment mechanism 52 that can switch the fixed blade 42 to any one of a plurality of switching positions having different degrees of overlap with the rotary blade 41 is provided. It has been.

Hereinafter, the fixed blade adjusting mechanism 52 will be described with reference to FIGS.
The fixed blade adjusting mechanism 52 supports each of the plurality of fixed blades 42 arranged along the axial direction, and supports the horizontal side cover portions 39a on both the left and right sides as a frame so as to be rotatable around the horizontal axis P2. The fixed blade support member 53 is provided. The fixed blade 42 is configured to be switched to one of a plurality of switching positions by rotating the fixed blade support member 53. Moreover, the fixed blade adjusting mechanism 52 can fix the position of the fixed blade 42 at each of a plurality of switching positions.

  The fixed blade support member 53 is formed in a substantially trapezoidal cylindrical shape in a side view, and is provided in a state extending over the left and right side wall portions 4A. A plurality of fixed blades 42 are attached to the fixed blade support member 53 in a comb-teeth shape at regular intervals in the axial direction. As with the rotary blade 41, the fixed blade 42 has double-edged blade portions 41 a formed on both side edges of the strip-shaped member.

  A retaining member 54 having a substantially L shape in side view applied to the outer peripheral corner portion of the fixed blade supporting member 53 and a round bar member 55 that is integrally fixed to the retaining member 54 and extends in the left-right direction are provided. Yes. The fixed blade 42 is formed on the fixed blade support member 53 in a state where the fixed blade 42 is mounted on both the left and right sides of the round bar member 55 with insertion holes (not shown) formed in the fixed blade 42 inserted therethrough. The slit-like long hole 56 is inserted, and the retaining member 54 is fixed to the fixed blade support member 53 with a bolt 57. Thus, the fixed blades 42 can be attached to the fixed blade support member 53 by a plurality (for example, four) of the single retaining members 54. By removing the bolt 57, the retaining member 54 and the plurality of fixed blades 42 can be removed.

  A swing operation member 58 is fixed to the axial end portion of the fixed blade support member 53. The swing operation member 58 has a shape obtained by bending a plate material into a substantially L shape in order to increase rigidity. The swing operation member 58 is rotatable around a shaft center thereof on a lateral support shaft 59 provided in a fixed position of the side cover portion 39a at a position corresponding to the base end portion of the fixed blade 42 in a side view. It is supported by. A reinforcing plate 60 is provided between the swing operation member 58 and the side cover portion 39a.

  An operation lever 61 is provided on the outer side of the lateral cover portion 39a. The operation lever 61 is swingable around the axis of the support shaft 59 integrally with the swing operation member 58. The operation lever 61 is formed by bending a band plate. The grip portion 61a of the operation lever 61 is located at a location spaced laterally outward from the lateral cover portion 39a. The rotation fulcrum portion 61b and the linkage portion 61c in the operation lever 61 are located at a location near the side cover portion 39a.

  In the linkage portion 61 c of the operation lever 61, an interlocking pin 62 that is interlocked and linked so as to rotate integrally with the swinging operation member 58 is provided in a state of being inserted over the operation lever 61 and the swinging operation member 58. An interlocking pin 62 is inserted into each of the lateral cover portion 39a and the reinforcing plate 60, and a long hole 63 that allows the interlocking pin 62 to rotate and move over a predetermined range around the axis of the support shaft 59 is provided. Is formed.

  An insertion hole 65 through which the fastening fixture 64 is inserted is formed at a position closer to the swing end than the interlocking pin 62 of the operation lever 61. In addition, three insertion holes 66a, 66b, 66c through which the fastening fixtures 64 are inserted are formed in the lateral cover portion 39a and the reinforcing plate 60, respectively. That is, the front insertion hole 66a through which the fastening fixture 64 is inserted in a state where the interlocking pin 62 is located at the front end of the long hole 63, and the fastening fixture 64 in a state where the interlocking pin 62 is located in the middle portion of the long hole 63. An intermediate insertion hole 66b to be inserted and a rear insertion hole 66c into which the fastening fixture 64 is inserted in a state where the interlocking pin 62 is positioned at the rear end portion of the long hole 63 are formed. A nut 68 to which the screw portion 67 of the fastening fixture 64 is screwed is fixed inside the position corresponding to the fastening fixture 64 of the swing operation member 58.

  The fastening fixture 64 is composed of a bar-like member that is long in the lateral direction, and is formed with a threaded portion 67 on one end side and a handle 69 for manual operation on the other end side. A handle 69 is provided so as to be located laterally outward so that the grip 61a of the operation lever 61 does not get in the way.

  As shown in FIG. 9, when the fastening fixture 64 is fastened and fixed in a state of being inserted through the front insertion hole 66a, the fixed blade support member 53 has the maximum overlap between the fixed blade 42 and the rotary blade 41. The maximum overlap position A1 is set, and the position is fixed at that position. At this time, the fixed blade 42 passes through a slit-like long hole 50a formed in the bottom guide body 50 and protrudes into the upper space of the bottom guide body 50 where the rotary blade 41 is rotating. Therefore, the fixed blade 42 and the rotary blade 41 overlap each other when viewed from the side. Moreover, the degree of overlap between the fixed blade 42 and the rotary blade 41 is maximized.

  When the fastening fixture 64 is fastened and fixed in a state of being inserted through the rear insertion hole 66c, the fixed blade support member 53 is set at the minimum overlap position A3 where the degree of overlap is minimum and is fixed at that position. At this time, as shown in FIG. 9, the fixed blade 42 is retracted to the lower side of the bottom guide body 50 through the long hole 50a.

  Thus, when the fixed blade support member 53 is set to the minimum overlapping position A3, the fixed blade 42 is configured not to overlap the rotary blade 41 in a side view. That is, the minimum overlap position A3 corresponds to the non-operation position.

  When the fastening fixture 64 is fastened and fixed in a state of being inserted into the intermediate insertion hole 66b, the fixed blade support member 53 is set to an intermediate overlapping position A2 where the overlapping degree is an intermediate polymerization degree smaller than the maximum overlapping position A1. And the position is fixed at that position. At this time, the fixed blade 42 protrudes into the upper space of the bottom guide body 50 through the long hole 50a, but the protrusion amount is smaller than the maximum overlap position A1. Therefore, the maximum overlap position A1 and the intermediate overlap position A2 correspond to a plurality of switching positions having different degrees of overlap in the cutting action state where the fixed blade 42 overlaps the rotary blade 41 in a side view.

  Switching to each position of the fixed blade 42 is performed according to the following procedure. The handle 69 is operated to loosen the screw connection of the tightening fixture 64 and remove it from the side cover 39a and the reinforcing plate 60. Next, the operation lever 61 is swung and moved to a desired position. Then, the handle 69 is operated to fasten the fastening fixture 64 with screws.

  As shown in FIGS. 2 and 4, the outer peripheral portion of the rotary blade 41 is covered with an exhaust wall cover 39. The location corresponding to the front upper side of the rotary blade 41 in the waste wall cover 39 is open to form a space for the waste wall to enter. As shown in FIG. 4, a portion corresponding to the rear lower side of the rotary blade 41 in the discharge wall cover 39 has a discharge opening 70 opened obliquely downward on the rear side in order to discharge the shredded wall waste outward. Is formed.

  The rear upper cover portion 39b corresponding to the rear upper side of the rotary blade 41 in the discharge wall cover 39 has a function of guiding the waste scraps that are not discharged by the rotary blade 41 to the front side. Then, as shown in FIG. 4, the rear upper cover portion 39 b is provided in a rearward downward inclined posture that substantially follows the tip rotation locus L of the rotary blade 41. With this configuration, the rotary blade 41 rotates in a state of approaching the rear upper cover portion 39b, so that there is no unnecessary space on the rear upper side of the rotary blade 41, and the waste scraps are guided without staying. Immediately discharged outside.

  A discharge port cover 39 c that covers the outer peripheral edge of the discharge opening 70 is provided at the lower rear end of the discharge wall cover 39. The left side portion of the discharge port cover portion 39c is provided along the left side side cover portion 39a along the longitudinal direction of the machine body, and the right side portion of the discharge port cover portion 39c is inclined so as to be located on the right side as the lower side. Is formed.

  The waste straw shredding device 38 is supported by the side wall portion 4 </ b> A of the threshing device 4 so as to be rotatable around the vertical axis Y at the left front side portion of the waste straw cover 39. As shown in FIGS. 3 and 5, a pair of upper and lower support brackets 71 and 72 are fixed to the left side wall portion 4 </ b> A of the threshing device 4. The support brackets 71 and 72 on both the upper and lower sides are respectively provided with fulcrum pins 73 and 74 directed upward and downward at the rear ends.

  As shown in FIG. 3, the drainer cover 39 is provided with a pair of upper and lower pivot boss portions 75 and 76 that are fitted to the upper and lower fulcrum pins 73 and 74. Then, by fitting the upper and lower pivot boss portions 75 and 76 to the fulcrum pins 73 and 74, the exhaust wall cover 39, that is, the entire exhaust wall shredding device 38 can be rotatably supported. The right side portion of the waste wall cover 39 is configured to be bolt-connected to the rear end portion of the threshing device 4 at a connection portion (not shown). When the upper and lower pivot bosses 75 and 76 are fitted to the fulcrum pins 73 and 74, if the right side portion of the draining cover 39 is bolted, the draining shredder 38 is attached to the rear part of the threshing device 4. It will be in a state of being connected.

  Accordingly, when the bolt connection at the right side portion of the drain wall cover 39 is released, the drain wall shredding device 38 can swing and open around the vertical axis Y of the fulcrum pins 73 and 74. However, in this case, it is necessary to remove the transmission endless rotating belt 77 described later.

[Transmission structure]
Next, the transmission structure for the waste straw shredding device 38 will be described.
As shown in FIGS. 3 and 5, a transmission mechanism 78 that transmits power to the waste straw shredding device 38 is provided on the left side of the threshing device 4. The transmission mechanism 78 includes a driving wheel body 80, a driven wheel body 79 that rotates integrally with the rotating body 40, and an endless rotating belt 77 as an endless rotating body that is wound around the driven wheel body 79 and the driving wheel body 80. And a tension mechanism 81 that applies tension to the endless rotating belt 77. The driving wheel body 80 is supported by a relay support shaft 82 fixed to the left side wall portion 4 </ b> A of the threshing device 4. The power of the engine 8 is transmitted to an input pulley 83 provided on the relay support shaft 82 via a transmission system (not shown).

  The tension mechanism 81 is a tension pulley 84 that presses the endless rotating belt 77, a tension arm 85 that supports the tension pulley 84, and an urging mechanism that swings and urges the tension arm 85 to apply tension. Tension spring 86.

  As shown in FIG. 3, the tension arm 85 is supported by a pivotal support member 87 that is integrally fixed to the lower support bracket 72 so as to be rotatable around the horizontal axis P3. The support bracket 72 is bolted to a pair of front and rear vertical frame portions 88 that are substantially U-shaped in a plan view provided on the side wall portion 4 </ b> A of the threshing device 4. And the pivot member 87 is formed in the substantially U shape by planar view, and is being integrally fixed to the threshing device 4 inner side of the support bracket 72. As shown in FIG. A tension arm 85 is pivotally connected to a portion protruding above the pivot member 87.

  An adjustment screw 86 a is provided on the upper part of the tension spring 86, and this adjustment screw 86 a is supported by the upper support bracket 71. An adjustment screw 86 a is supported by tightening with a nut 90 on an L-shaped holding member 89 that is integrally fixed to the support bracket 71. By changing the tightening position by the nut 90, it is possible to adjust the tension force by the tension spring 86, that is, the tension force by the tension pulley 84.

  As shown in FIG. 5, the outer side of the transmission mechanism 78 is covered with an exterior cover 91 so that the transmission mechanism 78 is not exposed to the outside. As shown in FIGS. 3 and 5, the exterior cover 91 includes a locking portion 93 that locks to a locked portion 92 provided in the lateral cover portion 39 a on the lower side, and a locked portion on the upper side. An elastic engagement type locking device 95 having a well-known structure to be engaged with 94 is provided, and is easily detachably supported. In addition, the outer side of the transmission mechanism 78 located in the side of the threshing apparatus 4 is covered with the threshing cover 96 (refer FIG. 1).

[Another embodiment]
(1) In the above embodiment, the blade portion 41a of the rotary blade 41 is configured in a double-edged shape, but instead of this configuration, the blade portion 41a of the rotary blade 41 is configured in a single-edged shape as shown in FIG. It may be done.

(2) In the above embodiment, the plurality of switching positions with different degrees of overlap between the fixed blade 42 and the rotary blade 41 are configured to be switchable between two positions, the maximum overlap position A1 and the intermediate overlap position A2. Instead of this, it may be configured to switch to three or more positions.

(3) In the above embodiment, the fixed blade 42 is configured to be switchable to a non-acting position that does not overlap with the rotary blade 41 in a side view, but such a configuration may not be provided.

(4) In the above-described embodiment, the fixed blade adjustment mechanism 52 is configured to be able to fix the position of the fixed blade 42 at each of the plurality of switching positions. However, instead of this configuration, the following configuration is also possible. Good. In this embodiment, the support structure of the plurality of fixed blades 42 with respect to the exhaust wall cover 39 is the same as that in the above embodiment. That is, as shown in FIGS. 9 and 10, the plurality of fixed blades 42 are supported by the fixed blade support member 53, and are rotatably supported around the horizontal axis P <b> 2 via the swing operation member 58.

  As shown in FIG. 15, the fixed blade support member 53 is located at the maximum overlap position A4 where the overlapping degree between the fixed blade 42 and the rotary blade 41 is the maximum, and on the lower side in the discharge wall transport direction than the maximum overlap position A4. Thus, the posture can be changed over the minimum overlap position A5 having the smallest overlap degree. The fixed blade adjusting mechanism 52 includes a tension spring 97 as an urging mechanism that urges the fixed blade support member 53 to move toward the maximum overlap position A4. The fixed blade support member 53 is configured to move toward the minimum overlap position A5 against the urging force of the tension spring 97, and the overlap degree sequentially changes. In FIG. 15, the same members as those in the above embodiment are denoted by the same reference numerals, but the description thereof is omitted.

  When the description is added, the interlocking pin 62 extends outward in the lateral direction through the long hole 63 formed in the left side cover portion 39a of the left side cover 39 in the same manner as in the above embodiment. A tension spring 97 that acts on the interlocking pin 62 and pulls upward is provided on the outer surface side of the side cover portion 39a. An adjustment screw 97a is provided on the upper part of the tension spring 97, and the position is fixed by tightening the nut 98 on a bracket 98 fixed to the side cover portion 39a. The spring biasing force can be changed by changing the tightening position of the nut 99.

  The present invention can also be applied to a semi-crawler combine and a wheel combine that are configured to throw the whole harvested culm into a threshing apparatus and perform a threshing process in addition to the crawler combine.

DESCRIPTION OF SYMBOLS 4 Threshing device 9 Harvesting part 38 Drainer shredder 40 Rotating body 41 Rotating blade 42 Fixed blade 52 Fixed blade adjustment mechanism 53 Fixed blade support member 97 Energizing mechanism A1, A4 Maximum overlap position A3, A5 Minimum overlap position

Claims (5)

A reaping part for reaping planted cereals, a threshing device for threshing the harvested cereal culm when all of the reaped cereals are thrown in, and a shredder after the threshing process discharged from the threshing device An exhaust wall shredding device
The draining shredder is
A rotating body provided in a state extending along the lateral direction and rotating around a lateral axis;
A plurality of rotary blades that are provided on the outer peripheral portion of the rotating body in a state of being arranged radially with a space along the axial direction of the rotating body and extending radially, and rotate integrally with the rotating body;
A plurality of fixed blades provided in a state where they are arranged at intervals along the axial direction and overlap with the rotary blades in a side view;
A fixed blade adjustment mechanism capable of switching the fixed blade to one of a plurality of switching positions having different degrees of overlap with the rotary blade in a cutting action state where the fixed blade overlaps with the rotary blade in a side view. Combine.   The fixed blade adjusting mechanism includes a fixed blade support member that supports each of the plurality of fixed blades arranged along the axial direction and is supported by a frame body so as to be rotatable around a horizontal axis. The combine according to claim 1, wherein the fixed blade is switched to one of the plurality of switching positions by rotating the blade support member.   3. The combine according to claim 1, wherein the fixed blade adjusting mechanism is capable of switching the fixed blade to the plurality of switching positions, and is capable of fixing the position of the fixed blade at each of the plurality of switching positions. .   The combine according to claim 3, wherein the fixed blade adjusting mechanism is configured to be able to switch the fixed blade to a non-operating position that does not overlap with the rotary blade in a side view and to be fixed to the non-operating position. The fixed blade support member has a maximum overlap position where the overlap degree between the fixed blade and the rotary blade is the maximum, and a minimum position where the overlap degree is the smallest and located on the lower side in the discharge wall transport direction than the maximum overlap position. The posture can be changed over the overlapping position,
The fixed blade adjustment mechanism is
An urging mechanism for urging and moving the fixed blade support member toward the maximum overlapping position;
The fixed blade support member moves toward the minimum overlapping position against the urging force of the urging mechanism as the processing amount of the thrown-out waster thrown increases, so that the overlapping degree changes sequentially. The combine according to claim 2 configured.

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