JP2001016958A - Blade of threshing rotor of general-purpose combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the stay of grain culms, etc., in a threshing part of a general-purpose combine harvester and improve the maintainability of feeding blades protrusively installed in a rotor. SOLUTION: The feeding blades 21b and 22b arranged in threshing rotors 21 and 22 in a threshing part 18 of a general-purpose combine harvester are obtained by providing a structure thereof freely detachable from rotor bodies, further providing a structure in which the shape of the respective feeding blades 21b and 22b is made left and right symmetrical when viewed from the side and the blades 21b and 22b can be mounted on the rotors 21 and 22 even when the left and right are counterchanged and using an alloy steel excellent in corrosion resistance and durability in the feeding blades 21b and 22b. A structure in which a notched part 21f (22f) is recessed and installed in the end face on the side of a screw blade 21a (22a) of the feeding blade 21b (22b) and a part of the rotating surface of the feeding blade 21b (22b) and the rotating surface of the screw blade 21a (22a) is lapped is provided in a place where a gap of a boundary between the feeding blade 21b (22b) and the screw blade 21a (22a).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a feed blade and a screw blade protruding from a surface in a threshing unit of a general-purpose combiner.

[0002]

2. Description of the Related Art Conventionally, a general-purpose combiner has a reaping portion protruding forward of a traveling device, and conveys grain stalks cut by the reaping portion to a rear side so that an axis thereof is directed horizontally to the right and left of the machine and is connected in front and rear parallel. Is supplied to a threshing unit in which screw-type rotors are arranged side by side. Then, threshing is performed by rotation of the rotor, and the culms after threshing are discharged to the rear of the machine. In addition, a receiving net is disposed below the rotor, and grains, straw chips, trash, etc. leaking from the receiving net are sorted by a sorting device provided below the threshing unit. Discharged from behind,
The granules were configured to be stored in a Glen tank located above the threshing unit.

In the threshing section, a screw blade of the first rotor (front rotor) is formed from a left end of the first rotor to a position immediately to the left of a communicating portion between the first rotor and the second rotor (rear rotor). On the outer peripheral surface of the first rotor in front of the communication portion, plate-like feed blades protruding in the radial direction of the first rotor were formed. Similarly, the screw blade of the second rotor is formed from the right end of the second rotor to the right side of the discharge port, and a feed blade is formed on the outer peripheral surface of the second rotor in front of the discharge port on the left side of the screw blade end. It had been. Further, the rotating surfaces of the screw blades and the feed blades of both rotors are configured so as not to overlap with each other, and the waste (threated culm) after threshing is sent from the screw blades to the feed blade and discharged.

[0004]

However, in the prior art described above, the threshing unit rotor is constantly in contact with the grain culm during threshing, so that it tends to be fatigued due to wear and the like, and is extracted when threshing the grain culm. The water content causes corrosion due to rust and the like. Further, in the rotor of the threshing unit, when the waste (threated culm) after threshing is transferred from the screw blade to the feed blade, the transfer does not work well, and clogging of the grain culm or the like occurs at the boundary between the screw blade and the feed blade. There is a problem of accumulation.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to prevent accumulation of grain stalks and the like in a threshing unit of a general-purpose combiner and to improve maintenance of a feed blade protruding from a rotor.

[0006]

The above is the problem to be solved by the present invention. Next, means for solving the problem will be described. That is, in the configuration in which the feed blades for discharging the culm are provided at the end portion in the feed direction of the rotor arranged in the threshing unit of the general-purpose combiner, the plate is bent into a V shape in a side view to form the feed blades, and the feed blades are formed. It was detachably attached to the outer periphery of the plurality of rotor bodies in parallel with its axis.

Further, the feed blade is made of an alloy steel having excellent corrosion resistance and durability. Further, a notch is provided on an end face on the screw blade side of the feed blade provided in the vicinity of the terminal end in the rotor feed direction of the screw blade protruding from the rotor surface. The end surface of the feed blade on the screw blade side and the terminal end of the screw blade were wrapped in a front view.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a partial cross-sectional view of a general-purpose combiner, FIG. 2 is a plan view of the same, FIG. 3 is a side cross-sectional view of a threshing unit and a sorting device, FIG. 4 is a plan cross-sectional view of a threshing unit, and FIG. FIG. 6, FIG. 6 is a rear cross-sectional view, and FIG.
FIG. 8 is a right side view of the first rotor, FIG. 9 is a side view of the feed blade, FIG.
Is a plan development view of the first rotor, and FIG. 12 is a plan view of the same.

First, the overall structure of a general-purpose combiner according to the present invention will be described with reference to FIGS. 1, 2 and 3. The machine frame 13 is mounted on the crawler traveling device 1, and the sorting device 19, the threshing unit 18, and the engine room 49 for storing the engine 48 and the like are mounted on the machine frame 13.
The grain tank 30 is disposed on the threshing unit 18, and a discharge auger 40 for discharging the grains stored therein is disposed on the side of the Glen tank 30. Also, the reaper 8 protrudes forward from the machine frame 13. The reaping unit 8 stores the lateral feed auger 3 in the platform 2 in the left-right direction, and collects the grain stalks substantially at the center in the left-right direction by rotating. A cutting blade 4 is provided horizontally below the front end of the platform 2, and a raking reel 5 is disposed above and in front of the cutting blade 4. The rear part of the lifting link 6 is pivotally supported on the rear part on both sides of the platform 2, and the scraping reel 5 is rotatably supported at the front end of the lifting link 6, and the scraping reel 5 is driven to rotate by a hydraulic motor or the like. You. In addition, weeding plates 7 are disposed at the front ends on both sides of the platform 2.

A transport device 9 is disposed between the cutting section 8 and the threshing section 18, and the transport device 9 includes a feeder house 10
The front end of the feeder house 10 is communicated with the feed end position of the screw blade of the traverse auger 3 slightly to the left with respect to the advancing direction from the left and right center of the rear part of the platform 2. I have. The rear end of the feeder house 10 is communicated with a threshing inlet 12, and a cylindrical beater 34 having a rotation axis in the left and right horizontal direction is arranged in the threshing inlet 12 to forcibly remove the grain culm from the threshing unit. 18 to send. Feeder house 10
The rear part is supported by the machine frame 13 so as to be vertically rotatable. A hydraulic cylinder (not shown) is interposed between the lower surface of the feeder house 10 and the machine frame 13,
The reaping unit 8 can be moved up and down. Further, a cabin 17 containing the driver's seat 15 and the steering handle 16 and the like is disposed above the feeder house 10 and the beater 34. The cabin 17 is disposed at an upper position in front of the left, right and center of the fuselage to improve visibility. , Making it easier to check the reaping work, and getting on and off from both left and right sides.

The feeder house 10 and the beater 3
The threshing inlet 4 and the threshing inlet 12 are provided on the left side in the advancing direction of the fuselage. The transfer is made rightward by the rotation of the rotor 21.

The threshing unit 18 includes a first rotor (front rotor) 21, a second rotor (rear rotor) 22, and receiving nets 23.2.
4 etc., and are stored in the upper part of the machine frame 13. The first rotor 21 and the second rotor 22 are formed in substantially the same shape, the outer periphery of the cylinder is formed in a screw type provided with screw blades 21a and 22a having toothed teeth around the shaft, and the axial center is left and right. They are oriented in the horizontal direction and are arranged in front and rear parallel. In the threshing section in which the rotor having the axis in the front-rear direction is arranged, the length is longer in the front-rear direction. However, in the threshing section 18 in which the rotors 21 and 22 having the axis in the left and right directions are provided as in this embodiment, the length can be shorter in the front-rear direction. Yes, sorting device 1
9 The engine room 49 can be provided by utilizing the space above the rear part, and the layout can be efficiently performed.

Below the first rotor 21 and the second rotor 22, receiving nets 23 and 24 are disposed, respectively, and above the first rotor 21 and the second rotor 22 are upper cover 3 respectively.
5 and 36 are arranged to form a front rotor chamber and a rear rotor chamber. Further, the rear part of the right side of the receiving net 23 below the first rotor 21 is inclined in a gentle arc shape to the front low and rear high, and is extended toward the tangential direction of the upper and outer circumferences of the second rotor 22, and the cereal culm sending part Is formed, and the communication portion 123 is formed.
The rear end extends to near the front end of the rotation locus of the second rotor 22. Further, at the left rear portion of the receiving net 24, a discharge portion 124 which is a grain culm sending portion is formed.

Further, dust feed valves 59, 59,... Are provided on the inner peripheral surface of the upper covers 35, 36, which are formed horizontally, at appropriate intervals in the left-right width direction.
5 and 36 are rotatably supported on a vertical fulcrum about a vertical fulcrum. By rotating the dust feed valves 59, 59. The time for moving in the second rotor 22 can be adjusted according to the type of cereal stem and the state of the cereal stem, and the versatile threshing unit 18 adapted to various varieties and the like is configured.

The screw blade 2 of the first rotor 21
1a is formed between the left end of the first rotor 21 and the immediately left side of the communication portion 123, and a plate-shaped feed projecting in the radial direction of the first rotor 21 is provided on the outer peripheral surface of the first rotor 21 in front of the communication portion 123. The blades 21b are formed. Similarly, the screw blade 22a of the second rotor 22 is formed between the right end of the second rotor 22 and the right side of the discharge portion 124, and the second rotor 22 in front of the discharge portion 124 on the left side of the terminal end of the screw blade 22a. Feed blades 22b on the outer peripheral surface
Are formed, and the waste (threated culm) after threshing is sent by the feed blades 22b, and is discharged from the discharge portion 124.

In such a configuration, when the cut culm is sent from the feeder house 10 to the threshing inlet 12,
Due to the rotation of the first rotor 21, the harvested culm is shed while being transported rightward. Then, when reaching the right end of the first rotor 21, it is sent to the threshing space of the second rotor 22 from the communication portion 123 formed in a gentle slope, and is threshed while being conveyed leftward by the rotation of the second rotor 22, When sent to the left end of the rotor 22, it is dropped from the discharge section 124.

A guide plate 60 extends rearward and downward from the lower portion of the discharge portion 124, and is disposed between the upper portion of the rear portion of the guide plate 60 and the bottom surface of the engine compartment 49 to forcibly discharge the culm to the rear. A culm beater 61 is provided. The culm beater 61 has a small outer diameter compared to the outer diameters of the rotors 21 and 22 and has a shape that is easy to assemble. The rotation speed of the culm beater 61 is higher than the rotation speed of the second rotor 22 for discharging. The peripheral speed of the culm beater 61 is
・ The speed is higher than that of 22, and the ability to send out the culm backwards is enhanced.

The culm beater 61 has a discharge portion 1 at the left end.
24, the right end of the culm beater 61 extends further to the right than the right end of the discharge portion 124, and the discharge portion 124
The discharged culm discharged from the culm beater 61 is conveyed to the suction fan 92 at the rear of the culm beater 61, and is taken over by a chipper type spreader 62 laid horizontally across the entire width at the rear end of the fuselage. The spreader 62 is cut by a plurality of hatchet-shaped blades and discharged to the field from the rear end of the machine.

A sorting device (oscillating sorting device) 19 is disposed below the threshing unit 18, and its configuration is such as a fluffing plate 25, an oscillating main body 50, a Karin 27 that generates a sorting wind, and a sorting machine. The first conveyor 28 that transports the first object in the left-right direction
And a second conveyor 31 for conveying the second product. The first conveyor 28 and the second conveyor 31 are provided laterally behind the crawler traveling device 1 in a side view, and are connected to the left end of the first conveyor 28 and arranged in a vertical manner in a bucket-type ferry conveyor 29 or the like. The efficient layout is such that the reduction conveyor 32 continuously connected to the left end of the left end of the first conveyor 28 and the crawler traveling device 1 do not interfere with each other. Further, the sorting device 19 is accommodated between the front and rear middle portion of the machine frame 14 and the rear portion thereof, and a transmission drive device 45 is disposed at a front portion of the machine frame 14 in front of the sorting device 19 and at a lower position after the feeder house 10. The overall length can be shortened as an efficient layout.

The oscillating body 50 is provided with the first rotor 21.
It is arranged from below the front end to the rear end of the sorting device 19, and is swingably supported by a swing link mechanism 51. A grain pan 50a is formed in the front part of the swinging main body 50 for receiving the grain stalks dropped below the first rotor 21 and the second rotor 22. The grain bread 50
“a” is formed in a wavy shape in a side view, and is conveyed backward by the swing of the swing body 50.

A sieving wire 52 is arranged continuously to the rear end of the grain pan 50a. A chaff portion composed of a plurality of chaff fins extending in the width direction of the swing main body 50 is arranged from below the screen 52 to the rear end of the swing main body 50. The chaff portion includes a movable chaff 53 in which the front lowering inclination angle of the chaff fin changes according to the amount of grain culled from the front side, a manual chaff 54 in which the front lowering inclination angle of the chaff fin changes manually, and a front lowering inclination angle of the chaff fin. Are fixed to the fixed chaff 55. The bottom surface of the swinging body 50 below the chaff portion has an opening 55b and is covered with a crimp net (not shown).

The grain pan 5 of the swing body 50
A Kara-min 27 is horizontally installed below the front and rear part of the 0a, a sorting wind is sent backward according to the guide, and a sorting wind is sent into the swinging body 50 from the falling port 55b and the like, and specific gravity sorting and wind sorting are performed in the chaff portion. And sort them into the first and second ones.

In such a structure, grains, straw chips and the like dropped from the receiving nets 23 and 24 of the first rotor 21 and the second rotor 22 are received on the grain pan 50 a of the swinging body 50. Conveyed backward, grain pan 50a
The ball is bounced backward from the rear by the sieving line 52, and is dropped on the chaff as it is, whereby specific gravity selection and wind selection are performed.

Next, the flow of the grain culm in the threshing section will be described with reference to FIG.
This will be described with reference to FIGS. Threshing unit 18
Are the first rotor 21, the second rotor 22, and the receiving nets 23 and 24.
And is stored in the rear of the driver's seat 15 and above the machine frame 13. The outer peripheries of the rotors 21 and 22 are formed in a screw type having screw blades 21a and 22a having toothed teeth on the periphery thereof, and their axes are oriented in the left-right horizontal direction and arranged in front and rear parallel.

The screw blade 2 of the first rotor 21
1a is formed between the left end of the first rotor 21 and the immediately left side of the communication portion 123, and a plate-shaped feed projecting in the radial direction of the first rotor 21 is provided on the outer peripheral surface of the first rotor 21 in front of the communication portion 123. The blades 21b are formed. The number of the feed blades 21b is not limited, but three are formed in order to reduce the weight, reduce the number of parts, and increase the transfer efficiency. The upper surface of the first rotor 21 with a gap between the screw rotor 21a and the feed blades 21b, 21b,.. Is provided with a partition plate 251. The tip of the screw blade 21a at the end of the rotor 21 in the feed direction is located within the left and right width of the partition plate 251, and the rotation surface of the tip of the screw blade 21a at the end of the rotor 21 in the feed direction has a communicating portion 123 that extends beyond the partition plate 251. And partially overlapped with the rotation surface of the feed blade 21b.

Similarly, the screw blade 2 of the second rotor 22
1a is formed between the right end portion of the second rotor 22 and the right side of the discharge portion 124, and feed blades 22b are formed on the outer peripheral surface of the second rotor 22 of the left discharge portion 124. . Accordingly, the culms (thaw) after threshing are sent by the feed blades 22b, 22b, and are discharged from the discharge unit 124. Similarly, the second rotor 2 is formed on a substantially boundary surface between the screw blade 22a and the feed blades 22b at the end portion in the feed direction and a surface perpendicular to the rotor rotation shaft 22d.
2 and a partition plate 2 around the upper part of the second rotor 22 through a gap.
52 are provided. The screw blade 22a at the end of the rotor 22 in the feed direction extends beyond the partition plate 252. The screw blade 22a at the end of the rotor 22 in the feed direction is structured so as to partially overlap with the rotation surface of the feed blade 22b on the discharge portion 124 side. As shown in FIG. 5, the partition plate 252 is disposed at the upper half position of the second rotor 22 and is divided into three parts to facilitate assembly and disassembly and facilitate maintenance.

The cereal stalks that have been thrown off by the beater 34 and sent to the threshing unit 18 are threshed by the first rotor 21, and the cereal stalks are screwed by the screw blades 21 on the outer periphery of the first rotor 21.
a and is sent to the right end of the first rotor 21.
Then, at the time of threshing, the grain is prevented from being blocked by the partition plate 251 and splashed to the communication portion 123, and the grain is reliably dropped from the receiving net 23 to the sorting device 19.
Further, the grain culm is also blocked once by the partition plate 251 to prevent the grain culm from being sent to the communicating portion 123 without being inadvertently. The grain culm is surely guided by the screw blade 21a, and is fed from the fixed position to the sending blade on the communicating portion 123 side. 21b, 21b, etc.

Thus, without the partition plate 251,
The culm moves in an oblique direction, and the feed blades 21b
The throwing power that is thrown out in b .. is weak, and the cereal stems fall and accumulate directly below the first rotor 21 side, causing clogging. However, by disposing the partition plate 251,
Grain stalks, grains, etc. do not jump out to the side beyond the partition plate 251, and furthermore, the screw blade 21 at the terminal end in the feed direction
a partially overlaps with the rotation surface of the feed blade 21b, the lateral feed action of the first rotor 21 to the communication portion 123 side increases, and the fed grain stem rotates the feed blades 21b, 21b,. As a result, the rotor 21 is substantially half-circled and is followed up, and after being given sufficient guidance, is thrown out to the second rotor 22 side of the communication portion 123 by underslow.

Next, the grain is threshed by the second rotor 22 again, guided by the screw blades 22a on the outer periphery of the second rotor 21, and sent to the left end of the second rotor 22. And
Further, during threshing, the grains are prevented from being blocked by the partition plate 252 and splashed to the discharge section 124, and the grains are reliably dropped from the receiving net 24 to the sorting device 19. The grain culm is almost completely threshed by the two rotors 21 and 22 to form a waste culm, and the waste culm is also blocked once by the partition plate 252 and is prevented from being sent to the discharge part 124 without being inadvertently. The culm is guided by the screw blade 22a and is taken over from a fixed position by the feed wings 22b on the discharge portion 124 side.

Then, the culm sent to the discharge portion 124 side of the second rotor 22 over the partition plate 252 is
2b, 22b, and the like, the rotor 22 is followed up substantially one round, and after sufficient guidance is given, the discharge unit 1
It is thrown out to the 24 culm beaters 61 with an over throw.

The wrap margin L2 between the rotation surface of the screw blade 22a at the end of the second rotor 21 and the discharge portion 124 is equal to the wrap margin between the rotation surface of the screw blade 21a at the end of the first rotor 21 and the communication portion 123. The larger the L1 and the larger the wrap allowance, the more the partition plates 251 and 25
This is effective in alleviating the stagnation of the grain culm (excreted culm) which is blocked by 2 and guided again by the screw blades 21a and 22a at the end portion in the feeding direction and continuously sent. The guide up to the ejection of the feed blades 22b of the second rotor 22 is performed because the ejection by the second rotor 22 is over-throw, the ejection direction is substantially horizontal, and a more sufficient ejection output is required. First under rotor 2
1 is longer than the guide of the feed blades 21b, 21b.
The second rotor 22 is made to make a complete rotation to give a sufficient throwing power, and is thrown toward the culm beater 61 side of the discharge part 124.

As described above, the partition plates 251 and 252 are disposed at substantially the boundary positions between the screw blades 21a and 22a of the rotors 21 and 22 and the feed blades 21b and 22b, and the culms are divided by the partition plates 251 and 252. It blocks the culms and the flung grains once, and furthermore, a part of the rotation surface of the screw blades 21a and 22a at the end of the rotor 21 and 22 in the feed direction and a cereal culm sending part (communication part 123, discharge part). 124), the grain culm (excreted culm) is reliably transferred to the feed blades 21b and 22b from a substantially constant position immediately after the partition plates 251 and 252, and a sufficient throwing power is applied by the feed blades 21b and 22b. The communication part 12
Grain stalks and the like are not stored in the vicinity of the rotor 3 or the lower side of the discharge section 124 or the rotor side.

As shown in FIG. 7, the first rotor 21
(And the second rotor 22) and the feed blade 21b (the feed blade 22).
The drum 21c (drum 22c) on which b) is fixed is formed into a cylindrical shape, and winding prevention plates 58 are arranged in the left and right ends of the drum 21c (drum 22c). FIG.
, The first rotor 2 on the inner peripheral surface of the machine frame 13
At the side of the first (and second rotor 22) position, the winding prevention plate 58
・ 58 is fixed. The winding prevention plate 58 has a hole 58a at the center thereof into which the drive shaft of the first rotor 21 can be inserted, and is formed in a disk shape having an outer diameter substantially equal to the inner diameter of the drum 21c. Further, the outer peripheral portion of the winding prevention plate 58 is bent inward to form an edge portion 58b, and the edge portion 5b is formed.
8b is inserted along the inner peripheral surface of the end of the drum 21c with a slight gap left between the drum 21c and the inner peripheral surface of the machine frame 13 to eliminate the gap between the first rotor 21 (and the second rotor 21). 2
The drive shaft is not entangled with 2).

The edge 58b of the wrap prevention plate 58 is not formed so as to cover the outer peripheral surface of the end of the drum 21c, but is inserted along the inner peripheral surface so that the end of the screw blade 21a is connected to the end of the drum 21c. To the first rotor 21
(And the second rotor 22) The grain culm conveyed to the end can be sent to the left and right direction by the screw blade 21a, and the grain culm does not stay on the first rotor 21 (and the second rotor 22). is there.

The first rotor 21 and the second rotor 22 have the same diameter, and the feed blades 21b, 21b,.
, The feed blades 22b, 22b,... Have the same shape, the rotation direction of the first rotor 21 is counterclockwise as viewed from the left side in the traveling direction, and the rotation direction of the second rotor 22 is counterclockwise. Thereby, the winding directions of the screw blade 21a and the screw blade 22a can also be made the same, and the first rotor 21 and the second rotor 22 can be made completely the same shape to enhance versatility and reduce cost. In addition, the partition plates 251 and 252 provided around the rotors 21 and 22 can be processed to have the same shape. Further, by making the rotation direction of the second rotor 22 clockwise, the grain culm conveyed rearward and upward at the end of the first rotor 21 can be inherited by the second rotor 22 with the conveyance direction being substantially the same direction, Easy to inherit.

Next, regarding the feed blades of the rotor in the threshing section,
This will be described with reference to FIGS. 8, 9 and 10. As described above, the first rotor 21 and the second rotor 22 have the same shape. Hereinafter, FIGS.
1, the configuration of the second rotor 22 is the same as that of the first rotor 21 and will be described with reference to the drawings of the first rotor 21 unless otherwise specified.

As shown in FIG. 8, on the surface of the first rotor 21 (second rotor 22), the feed blades 21b, 21b,.
(Feed blades 22b, 22b,...) Project in a plate shape in the rotor radial direction at the end portion in the rotor feed direction.
1b, 21b (feed blades 22b, 22b,...) Are fixed bolts 8 with the first rotor 21 (second rotor 22) body.
.., And is detachable from the first rotor 21 (second rotor 22) main body.

As shown in FIGS. 9 and 10, each feed blade 21b (feed blade 22b) is formed by bending a plate-shaped steel plate into a V-shape in a side view, and has a symmetrical shape, so that the feed blade 21b and the grain culm can be formed. When one of the left and right sides of the feed blades 21b, 21b... (Feed blades 22b, 22b,.
b) can be attached to the first rotor 21 (the second rotor 22) so that the unconsumed surface is in contact with the cereal stem by attaching the left and right sides in a side view. As described above, the first rotor 21 and the second rotor 22 have the same diameter, and the feed blades 21b, 21b,.
Are the same shape, and depending on the degree of wear, the feed blades 21b, 21b and 22b
22b ... can also be exchanged.

The feed blades 21b, 21b...
(Feeding blades 22b, 22b, etc.) are constantly in contact with the grain culm during threshing, so they are easily fatigued due to abrasion and the like, and are also susceptible to corrosion due to moisture and the like extracted when threshing the grain culm. Alloy steel such as stainless steel with excellent corrosion resistance and durability is used.

As shown in FIG. 11, the first rotor 21 (the first rotor 21) for guiding the feed blades 21b, 21b,... (Feed blades 22b, 22b,. Since the gap between the feed end of the screw blade 21a (screw blade 22a) spirally disposed on the surface of the two rotor 22 and the feed blade 21b becomes narrow, the screw rotor 21a is located near the end of the screw blade 21a (screw blade 22a). A notch 21f (22f) is provided on the screw blade side of the feed blade 21b (22b) to be rotated. Notch 21
f (22f) has an obliquely cut shape to prevent the grain stem from being caught in this gap.

A screw blade 21a (screw blade 22) spirally disposed on the surface of the first rotor 21 is provided.
The space between a) is reinforced by a strip-shaped reinforcing plate 82, and the strength of the screw blade 21a (the screw blade 22a) is increased.

Next, the arrangement of the feed blades and the screw blades in the rotor of the threshing unit will be described with reference to FIGS. The end of the screw blade 21a (the screw blade 22a) and the feed blades 21b
.. (feed blades 22b, 22b...) Are wrapped with the screw blade side in front view. In other words, the feed blades 21b, 21b (the feed blades 22b, 2
A lap margin L3 (L4) is provided by wrapping a part of the rotation surface of the screw blade 21a (the screw blade 22a) with the rotation surface of 2b.

With such a configuration, the cereal stems and the like are moved from the screw blades 21a (screw blades 22a) to the feed blades 21b, 21b... (The feed blades 22b, 22b).
・ ・) Smoothly delivered to prevent grain clogging.

[0044]

The present invention is configured as described above.
The following effects are obtained. That is, in the configuration in which the feed blades for discharging the waste culm are provided at the end portion in the feed direction of the rotor arranged in the threshing unit of the general-purpose combiner as in claim 1, the plate is bent into a V-shape in a side view to make the feed blades. Since the feed blades are detachably mounted on the outer periphery of the plurality of rotor bodies in parallel with the axis thereof, when the feed blade comes into contact with a grain stalk, when one of the left and right side surfaces of the feed blade is worn, etc. Since each feed blade can be turned right and left and the unconsumed surface can be turned upside down to be in contact with the grain stalk and used by attaching it to the rotor, the frequency of replacing parts for each feed blade is reduced by half, and it is efficiently extended. It can be used and leads to a reduction in maintenance costs. Further, since the feed blade is configured to be detachable from the rotor main body, maintenance is facilitated and maintainability is improved. Furthermore, if the first rotor and the second rotor have the same shape, the first rotor and the second rotor can be exchanged depending on the degree of wear.

Further, since the feed blade is made of an alloy steel having excellent corrosion resistance and durability, the feed blade is in constant contact with the grain culm during threshing, so that fatigue is reduced by abrasion and the like. In addition, it prevents corrosion such as rust caused by moisture extracted when threshing a grain stem, prolongs the life of each feed blade and improves the durability.

Further, since a notch is provided in the end face on the screw blade side of the feed blade provided in the vicinity of the terminal end in the rotor feed direction of the screw blade protruding from the rotor surface, as described in claim 3, It is possible to prevent clogging of the cereal stalk and the like in the gap portion and smoothly perform threshing and delivery of the cereal stalk.

In addition, since the end face of the feed blade on the screw blade side and the end portion of the screw blade are wrapped in a front view, grain culms and the like are smoothly transferred from the screw blade to the feed blade. This prevents clogging of grain culm and the like at the end of the rotor feeding direction.

[Brief description of the drawings]

FIG. 1 is an overall side view and a partial cross-sectional view of a general-purpose combine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side sectional view of a threshing unit and a sorting device.

FIG. 4 is a plan sectional view of the threshing unit.

FIG. 5 is a right side sectional view of the same.

FIG. 6 is a rear sectional view of the same.

FIG. 7 is a plan view of a double rotor.

FIG. 8 is a right side view of the first rotor.

FIG. 9 is a side view of the feed blade.

FIG. 10 is a plan view of the same.

FIG. 11 is a developed plan view of the first rotor.

FIG. 12 is a plan view of the same.

[Explanation of symbols]

 18 Threshing unit 21 First rotor 21a Screw blade 21b Feed blade 21f Notch 22 Second rotor 22a Screw blade 22b Feed blade 22f Notch L3 Lapping L4 Lapping

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Munenori Miyamoto 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka F-term in Yanmar Agricultural Machinery Co., Ltd. GA06 GB01 GC01 GC07 JA10 JB09

Claims (4)

[Claims] In a configuration in which a feed blade for discharging a culm is provided at a feed direction end portion of a rotor arranged in a threshing unit of a general-purpose combiner, a plate is bent into a V-shape in a side view to form a feed blade. A blade of a general-purpose combine threshing rotor, characterized in that a plurality of feed blades are detachably mounted on the outer periphery of a plurality of rotor bodies in parallel with its axis. 2. The blade of a general-purpose combine threshing rotor according to claim 1, wherein said feed blade is made of an alloy steel having excellent corrosion resistance and durability. 3. A feed blade provided in the vicinity of a terminal end in a rotor feed direction of a screw blade protruding from the rotor surface.
2. The blade of a general-purpose combine threshing rotor according to claim 1, wherein a cutout portion is provided on an end face on the screw blade side. 4. The blade of a general-purpose combine threshing rotor according to claim 1, wherein an end surface of the feed blade on the screw blade side and a screw blade end portion are wrapped in a front view.