JP2003325028A - Thresher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thresher capable of being improved in workability of a reaping work and a threshing work by preventing entanglement of stems at the shaft-bearing part of a threshing cylinder and the back wall of a threshing chamber. <P>SOLUTION: Threshing of grains is carried out by carrying cereal stems into the threshing chamber 15 from the front wall 31 and passing ears under the rotating threshing cylinder 13. The threshed stems are carried to a treatment chamber 19 from a stem discharge port 33 formed on the back wall 32 of the threshing chamber 15 and stuck grains remaining in the stems in the treatment chamber 19 are scraped off while they are transferred to a discharge chain 35 in the treatment chamber 19 and conveyed to a discharged stem cutter. As the stems fallen off from the rear end face 13c of the threshing cylinder 13 while they are conveyed from the threshing chamber 15 to the treatment chamber 19 move along a guide 41b, they are not pulled out by contacting with the rear end face 13c of the threshing cylinder 13. Therefore, the stems are not caught at the shaft-bearing part of the threshing cylinder 13 and the stem discharge port 33, and the forth port 37 is not blocked by the stems. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thresher mounted on a combine or the like, and more particularly to a thresher capable of preventing clogging of the fourth opening of a processing chamber.

[0002]

2. Description of the Related Art As a threshing machine mounted on a combine, for example, a lower handling axial flow type threshing machine is adopted, and it has a handling room having a handling cylinder and a processing chamber having a processing cylinder. , Threshing culms in the handling room, scraping off the clams remaining in the threshing culms in the processing room, and carrying the scraped kernels into the processing room (the culm outlet of the handling room From the 4th opening provided on the
It is designed to be dropped on a swinging sorting body arranged below it to prevent the grains from scattering outside the machine.

The grain culm, while being supported by the feed chain, is fed from the carry-in port formed on the front wall of the handling chamber to the processing chamber through the drainage port formed on the rear wall of the handling chamber. To be The culm threshed in the handling room is transferred from the feed chain to the culm chain in the processing chamber,
It is configured such that it is transported by the drainage chain so as to cross the processing chamber diagonally, passes through the processing chamber, and is carried out to a drainage cutting device or the like.

At this time, the grain culm is oriented in the handling chamber so that the tip of the grain culm is oriented substantially in the axial direction of the handling barrel so that the tip of the grain culm is surely brought into contact with the handling barrel. It is sent to the handling chamber in various postures and is conveyed in such a posture that it passes under the handling barrel due to the rotation of the handling barrel. For this reason,
When the grain culm conveyed by the feed chain passes through the rear end of the handling barrel, the tip of the culm jumps up to near the axis of the handling barrel. Then, the long culm pulled by the handle barrel (handle tooth) and disengaged from the feed chain is pulled out by contact with the rear end surface of the handle cylinder, and the shaft support portion of the handle cylinder and the handle It may be caught in the culm outlet on the rear wall of the chamber, and one end thereof may protrude above the No. 4 mouth in the culm conveying direction.

[0005]

In the processing cylinder, in addition to the grains that have been threshed by the handle cylinder, the handle cylinder (handle teeth)
In order to scrape off the culm that has been cut off at the same time, when the number of culms protruding above the No. 4 mouth increases by catching on the pivotal support of the handling barrel or the culm outlet of the rear wall of the handling chamber, The culms and culms scraped off by the processing cylinder are caught by the culms protruding above the No. 4 opening and are deposited so as to close the No. 4 opening. Then, the grain scraped off by the processing cylinder accumulates on the culm or the culm that closes the fourth opening, and not only does not fall on the rocking sorting body, but also from the handling chamber to the processing chamber. It becomes impossible to carry the culms and it becomes difficult to continue the threshing work. In particular, when performing harvesting work and threshing work of grain culms such as combine harvester at the same time, it is necessary to stop the combine harvester each time and eliminate the culm that closes the No. 4 opening, which improves workability of the harvesting work. It is causing the decrease.

In view of the above-mentioned circumstances, the present invention prevents the culm from being caught on the shaft support portion of the handle cylinder or the rear wall of the handle chamber, eliminates the blockage of the fourth port, and mows. It is an object of the present invention to provide a thresher that improves workability of work and threshing work.

[0007]

The invention according to claim 1 is
A handling room (15) having a front wall (31) formed with a grain culm carry-in port (28) and a rear wall (32) formed with a culm outlet (33) for carrying out threshed culms, The handling room (1
5) A handling cylinder (13) rotatably arranged between the front wall (31) and the rear wall (32), and the handling cylinder (15) arranged outside the handling chamber (15). 13) a thresher having a feed chain (7) for transporting the culms along
A flange portion (41) extending in the radial direction of the handle cylinder (13)
a) and an arc-shaped guide portion (41b) extending in the axial direction of the handle cylinder (13) at the tip of the flange portion (41a).
And a guide member (41) consisting of the above is integrally provided on the rear wall (32) of the handling chamber (15), and the guide portion (41b) is provided.
Is the outlet (3) of the rear wall (32) of the handling room (15).
The threshing machine is characterized in that it is located in the portion 3), and its tip is arranged in proximity to the outer edge of the rear end of the handling cylinder (13).

According to the second aspect of the present invention, the one end has the rear end face (13c) of the handle cylinder (13) and the guide member (4).
After the handle cylinder (13) so as to cover the minute gap (g) formed between the tip of the guide part (41b) of 1) and face the guide part (41b) at a predetermined interval. The threshing machine according to claim 1, characterized in that a scraper (42) fixed to the end is provided.

The reference numerals in parentheses are for the purpose of contrasting with the drawings, which are for convenience of understanding the invention and have no influence on the scope of the claims. It does not affect.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of a thresher according to the present invention. FIG. 1 is a perspective view showing an example of a combine equipped with the thresher according to the present invention, and FIG. 2 is a front view of the thresher according to FIG. 3, FIG. 3 is a plan view of the thresher shown in FIG. 2, FIG. 4 is a side view showing the rear wall of the threshing machine handling chamber seen from the processing chamber side, and FIG. It is an enlarged view which shows the attachment state of a member and a scraper.

In FIG. 1, a combine 1 comprises a pair of left and right crawler traveling devices 2, 2 and the crawler traveling devices 2,
2, a driver's seat 5 disposed on either the front or the left in the traveling direction of the machine body 3, and a pretreatment unit disposed in front of the machine body 3 for cutting and transporting grain stems. 6
And is located in the center of the other side of the fuselage 3,
The feed end of the pretreatment unit 6 receives a grain culm, and has a feed chain 7 that conveys the grain culm along a predetermined path, and performs threshing of the grain culm conveyed by the feed chain 7,
A threshing machine 11 for selecting and transferring threshed grains, a hopper 9 (or a grain tank) arranged behind the driver's seat 5 for temporarily storing the threshed grains, and a rear side of the threshing machine 11. And the culm cutting device 10 which cuts the threshed culm into a required length and sprays it on the field.

2 to 5, the thresher 11 is shown.
Is a handling chamber 1 in which a handling cylinder 13 having a plurality of handling teeth 12 (see FIGS. 3 and 4, only a part of which is shown) is rotatably arranged.
5 and a processing cylinder 17 having a plurality of blades 16 (see FIG. 4)
A rotatably disposed processing chamber 19, a net 20 for letting down the grains threshed by the handling cylinder 13 to separate and remove relatively large shoots, and a shoot for which the net 20 has leaked The rocking and sorting unit 21 is composed of a screw conveyor and a rocking and sorting unit 21 that separates and takes out only the grains from the kneaded grains and the grains mixed with the culm scraped from the culms in the processing chamber 19. The grains selected in No. 21 are put into the hopper 9 (see FIG. 1).
The first spiral 22 and the second spiral 23 to be transferred to, the Kara-mino fan 25 and the turbo fan 26 which send the classification air to the swinging and selecting section 21, and the selection air from the Kara-mino fan 25 and the turbo fan 26. The suction dust collecting fan 27 sucks the culm and discharges it to the outside of the machine. The handling cylinder 13 and the processing cylinder 17 are arranged in parallel at a predetermined interval so that a part thereof overlaps in the axial direction (see FIG. 3).

The handling chamber 15 is provided with the receiving net 20 arranged from the lower side of the handling barrel 13 to the back side thereof, and the shaft 29.
A cylinder cover 30 (see FIG. 4) that is swingably supported by (see FIG. 4) and covers the upper part of the handling cylinder 13, a front wall 31 that covers the front end of the handling cylinder 13, and the handling wall. The rear wall 32 covers the rear end of the body 13. The front wall 31 has a fixed portion 31a supporting the receiving net 20.
And a movable portion 31b formed integrally with the cylinder cover 30, and the rear wall 32 is formed integrally with the fixed portion 32a supporting the receiving net 20 and the cylinder cover 30. And a movable part 32b. A grain culvert carry-in port 28 (see FIG. 2) is formed between the fixed portion 31a and the movable portion 31b of the front wall 31, and the fixed portion 32a and the movable portion 32b of the rear wall 32 are formed.
An outlet 33 (see FIGS. 2 and 4) is formed between and. The movable portion 31 of the front wall 31 and the rear wall 32
A bearing 34 (a bearing on the movable portion 31b side is not shown) is arranged on each of b and 32b.

The handle cylinder 13 has a taper portion 13a formed on the grain culm carry-in port 28 side (tip side) and the taper portion 13
a cylindrical outer edge portion 13b connected to a and extending to the rear end,
A rear end surface 13c formed at the rear end of the outer edge portion 13b and an end surface 13d that is recessed toward the front end inside the rear end surface 13c.
Is formed, and a plurality of handle teeth 12 are arranged at appropriate intervals on the tapered portion 13a and the outer edge portion 13b. Further, the support shaft 13e (see FIG. 5) that supports the handle cylinder 13 includes a bearing (not shown) arranged on the movable portion 31b of the front wall 31 of the handle chamber 15 and the movable of the rear wall 32. It is rotatably supported by a bearing 34 arranged in the portion 32b.

In the processing chamber 19, there is arranged a culm chain 35 which receives the culm from the feed chain 7 and conveys the culm obliquely across the processing chamber 19. The drainage chain 35 is driven by the handling cylinder 13 as a drive source via a power transmission means 36 including a pair of pulleys 36a and a V belt 36b (see FIG. 3). Further, at the end portion of the processing chamber 19 on the rear wall 32 side, the fourth port 3 for guiding the grains and shoots scraped by the blades 16 of the processing cylinder 17 to the swing selection unit 21.
7 (see FIGS. 2 and 3) are formed.

The handle cylinder 13 of the movable portion 32b of the rear wall 32
The circular plate 39 faces the end surface 13d of the handle cylinder 13 and a part of the surface of the circular plate 39 protrudes into the culvert 33 formed by the fixed portion 32a and the movable portion 32b.
Are arranged. On the other hand, the end surface 13d of the handle cylinder 13
A scraper 42 is fixed to the end face 13d of the circular plate 39 so as to cover a gap formed between the end face 13d and the outer peripheral portion of the circular plate 39. Are prevented from getting in and caught on the shaft support of the handle cylinder 13. It should be noted that at the lower end of the circular plate 39, a scrap discharge port 39a for discharging a small culm that has entered between the end surface 13d of the handle cylinder 13 and the circular plate 39.
Are formed.

As shown in FIGS. 2, 4 and 5, the guide member 41 has a flange portion 41a extending in the radial direction of the handle cylinder 13 and the handle cylinder 13 at the tip of the flange portion 41a. A guide portion 41b extending in the axial direction is formed, and the guide portion 41b is at a rear extension position of the outer edge portion 13b of the handle barrel 13 and is located at the outlet 33 of the rear wall 32 of the handle chamber 15.
Is located in the handling chamber 15 via the circular plate 39 so as to form a gap g (see FIG. 5) between the rear end surface 13c of the handling cylinder 13 and the tip of the guide portion 41b. It is integrally fixed to the movable portion 32b of the rear wall 32.

Therefore, the handling chamber 15 of the threshing machine 11
The outlet 33 formed in the rear wall 32 of the
2 fixing part 32a and the guide part 41 of the guide member 41
It becomes a space surrounded by b and. It should be noted that since the handling cylinder 13 that is driven to rotate and the guide member 41 that is fixed to the movable portion 32b of the rear wall 32 and does not rotate face each other at the gap g, they do not contact each other. At the lower end of the guide member 41, a scrap discharge port 4 for discharging a small branch that has entered between the end surface 13d of the handle cylinder 13 and the flange portion 41a of the guide member 41.
1b is formed.

The scraper 42 is fixed to the rear end of the handle cylinder 13 so as to face the guide portion 41b of the guide member 41 with a gap h (see FIG. 5) over the gap g. Therefore, the scraper 42 rotates along the guide portion 41b due to the rotation of the handle cylinder 13, and the culms and culms that try to enter between the handle cylinder 13 and the guide member 41 through the gap g. Can be scratched out.

With such a structure, the grain culms conveyed by the feed chain 7 are handled in the handling chamber 15
From the carry-in port 28 formed in the front wall 31 of the
When it is carried in, it comes into contact with the rotating tapered portion 13a of the handle cylinder 13 and is pushed under the handle cylinder 13 while moving along the outer edge of the tapered barrel 13a. That is, since the transportation posture of the grain culm conveyed by the feed chain 7 is a posture in which the tip of the grain culm is pushed down from a substantially horizontal posture, the tip of the grain culm is pressed against the outer edge portion 13b of the handling barrel 13. become. In this state, the grain culm moves to the rear end side of the handling barrel 13 by the movement of the feed chain 7 while threshing due to the contact with the handling teeth 12, and the rear wall 32 of the handling chamber 15 moves. Exhaust outlet 3
3 is transferred to the processing chamber 19.

At this time, even if the culm which has been threshed by the handling barrel 13 passes through the rear end surface 13c of the handling barrel 13, the culm is guided by the guide portion 41b of the guide member 41. It does not bounce up toward the axial center of the handle cylinder 13. Then, when the culm passes through the guide portion 41b of the guide member 41 and is carried into the processing chamber 19, the culm jumps up in the processing chamber 19. Therefore, the rear end surface 13c of the handle barrel 13 in the handle chamber 15
The culm will not be pulled out by contact with.

Further, even if a culm or a branch branches into the minute gap g between the rear end surface 13c of the handle cylinder 13 and the front end surface of the guide portion 41b of the guide member 41, it is scraped out by the scraper 42. Therefore, a culm or a branch that is sized to be caught on the shaft support portion of the handle cylinder 13 does not enter between the end surface 13d of the handle cylinder 13 and the flange portion 41a of the guide member 41. . Further, even if a small culm enters between the end surface 13d of the handle cylinder 13 and the flange portion 41a of the guide member 41, it does not get caught on the shaft support portion of the handle cylinder 13 and the guide member. It is discharged from the scrap discharge port 41b formed in 41.

Further, since the culm does not come into contact with the rear end surface 13c of the handling cylinder 13 inside the handling chamber 15, the culm is removed from the feed chain 7 by contact with the rear end surface 13c of the handling cylinder 13. Is not pulled out, and the culvert 33 of the rear wall 32 of the handling chamber 15 and the pivot portion of the handling barrel 13 is not pulled out.
The culm is not caught in. Therefore, the culm does not project above the fourth opening 37. That is, the fourth opening 37
Is always open.

The culm carried into the processing chamber 19 is transferred from the feed chain 7 to the culm chain 35, and the culm cutting device is provided so that the culm chain 35 diagonally crosses the processing chamber 19. It is conveyed toward 10. Then, the culm transported by the culm chain 35 is
While being conveyed by the culm chain 35, the blade 16 of the processing cylinder 17 strikes the slag particles that are left inside the culm to be scraped off. At this time, not only the grains, but also the culms that have been cut by the handle teeth 12 at the time of threshing and sent together with the culms are scraped off at the same time.

The grain and culm scraped off from the culm conveyed by the culm chain 35 are dropped onto the rocking / sorting section 21 through the fourth opening 37. At this time, since there is no culm that closes the fourth opening 37, the grains and culms scraped from the culms conveyed by the culm chain are not accumulated in the fourth opening, and the rocking / sorting section is 21 falls on.

In the rocking / sorting section 21, the rocking action and the blown air from the Kara Tan fan 25 and the turbo fan 26,
By the suction action of the suction / dust fan 27, the culm is discharged from the grain and the culm that have fallen on the rocking / sorting section 21, and the grain is dropped to the first spiral 22 and the second spiral 23. Then, the grain is sent to the hopper 9 by the first spiral 22 and the second spiral 23, and is temporarily stored in the hopper 9.

In the above embodiment, since the guide member 41 and the scraper 42 are arranged on the cylinder cover 30 side, the maintenance space is formed above the receiving net 20 by raising the cylinder cover 30. Therefore, it is possible to easily remove the shavings accumulated in the back side of the handling chamber 15.

In the above-described embodiment, the rear end portion of the handle cylinder 13 enters the gap g between the rear end surface 13c of the handle cylinder 13 and the front end surface of the guide portion 41b of the guide member 41. Although the scraper 42 is provided to scrape out the culms and culms, the scraper 42 is used when the gap g is sufficiently small (for example, the tip of the threshed culm can enter). Need not be provided.

The guide portion 41 of the guide member 41 is also provided.
b is formed slightly smaller than the inner diameter of the rear end surface 13c of the handle cylinder 13, and the guide member 41 is attached to the guide portion 41b.
Of the end surface 13d from the rear end surface 13c of the handle cylinder 13
The outer edge portion 13b of the handle cylinder 13 and the guide portion 41b of the guide member 41 may be arranged to overlap so as to project to the side. Thus, the outer edge portion 13 b of the handle cylinder 13 and the guide portion 4 of the guide member 41.
When 1b is overlapped, it is not necessary to provide the scraper 42.

[0031]

According to the invention of claim 1, the guide part of the guide member covers the culm outlet of the rear wall of the handle room from the rear end face of the handle barrel, so that the culm rotates. The culm is not drawn toward the pivotal support of the handle barrel due to contact with the rear end face of the trunk, and long culms are caught on the pivotal support at the rear end of the handle barrel or the culm of the rear wall of the handle room. Can be prevented, clogging of No. 4 mouth can be eliminated, and workability of mowing work and threshing work can be improved.

According to the second aspect of the present invention, since the culms and the culms that enter into the minute gaps between the guide member and the handle cylinder are scraped out by the scraper, the shaft support portion at the rear end of the handle cylinder, It is possible to more reliably prevent the long culm from being caught in the culm outlet of the rear wall of the handling room, eliminate the clogging at the No. 4 mouth, and further improve the workability of the mowing work and the threshing work.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a combine equipped with a thresher according to the present invention.

FIG. 2 is a front view of a thresher according to the present invention.

FIG. 3 is a plan view of the thresher shown in FIG.

FIG. 4 is a side view showing the rear wall of the handling room of the thresher as seen from the processing room side.

FIG. 5 is an enlarged view showing a mounting state of a guide member and a scraper.

[Explanation of symbols]

7 ... Feed chain 11 ... Thresher 13 ... Handle barrel 13c ... rear end face 15 ... Handling room 28 ... Carrying port 31 ... Front wall 32 ... rear wall 33 ... Exit 41 ... Guide member 41a ... Flange part 41b ... Guide part 42 ... scraper g ... gap

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Claims (2)

[Claims] 1. A handling room having a front wall formed with a grain culm carry-in port and a rear wall formed with a culm outlet for carrying out threshed culms, and a front wall and a rear wall of the handling chamber. In a thresher having a handling barrel rotatably disposed between the handling barrel and a feed chain disposed outside the handling chamber and transporting grain culms along the handling barrel, the handling barrel A guide member composed of a flange portion extending in the radial direction and an arcuate guide portion extending in the axial direction of the handle cylinder at the tip of the flange portion is integrally provided on the rear wall of the handle chamber, The thresher is characterized in that the portion is located at the culm outlet portion of the rear wall of the handling chamber, and the tip portion thereof is arranged in proximity to the rear end outer edge portion of the handling barrel. 2. The one end covers a minute gap formed between the rear end surface of the handle cylinder and the tip of the guide portion of the guide member, and is opposed to the guide portion at a predetermined distance. The thresher according to claim 1, further comprising a scraper fixed to a rear end portion of the handle cylinder.