JPH0232030Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cut straw discharge device in the threshing section of a combine harvester.

In other words, in the threshing section of a combine that is constructed by installing a cross-flow fan in the upper part of the sorting and dust removal chamber where the rear part of the oscillating sorter extending from the bottom of the handling chamber can be seen, the discharge air from the cross-flow fan is used to cut straw into the straw cutter. The one that discharges water by direct contact with it was developed in 1974.
This can be seen in Japanese Patent No. 125371, but according to this publication, since the discharge air path is changed at the cutter portion, the wind speed is weakened and a good cutting aid effect cannot be expected. However, the present invention was made by considering the relationship between the cutter arrangement and the discharge air path, and it is possible to mix the cut straw from the tip side and the culm side of the waste straw and disperse it well in the field. It is possible to spread the cut straw well so that it does not bunch up in the field, prevent it from wrapping around the straw cutter, and supply the waste straw to the straw cutter well, and has a simple structure. The purpose of the present invention is to provide the following information so that it can be carried out suitably.

Next, the embodiment shown in the drawings will be described.

The drawing shows a side sectional view of a threshing section mounted on a combine harvester, in which a supply port 10 and a straw discharge port 11 are formed on both sides of the lower part of a handling chamber 1 containing a handling barrel 9, respectively.
A crimp net 12 is installed in the lower part of the handling room 1, and a downward dust inlet 13 is formed at the lower part of the straw outlet 11 side, and a third outlet 14 is provided behind the straw outlet 11.
From the lower part of the handling chamber 1 to the lower part of the sorting dust removal chamber 2, a swinging sorter is equipped with a feed pan 15, a chaff sieve 16, a grain sieve 17, a straw rack 18, and a flow board 19. The body A is extended, and a pressure fan 20 is installed below one end of the oscillating sorting body A, and the grain sieve 17
The No. 1 conveyor 22 is mounted inside the No. 1 bucket 21 below the straw rack 18, and the No. 2 conveyor 24 is mounted inside the No. 2 bucket 23 below the stroller rack 18, so that the structure is similar to the conventional structure. do.

A fan chamber 3 formed above the sorting and dust removal chamber 2
A cross-flow fan 3 is installed in the interior of the fan chamber 3a, and a suction port 25 is opened in the front part of the fan chamber 3a and is directed downward toward the upper part of the oscillating sorting body A.
A discharge air passage 7 is provided diagonally downward from the rear of the dust removal chamber 2, and above the sorting and dust removal chamber 2 is a straw removal chain 4 that takes over and conveys waste straw from the terminal end of a feed chain (not shown). It extends toward the rear, and below the straw discharging chain 4, a trapping rod 26 is installed and extended along with it.

Also, on the rear side of the sorting dust removal chamber 2, the third port 14 is
A cutter housing C is installed on the upper side, and inside the cutter housing C, a large number of disc blades 6a and 6b are fitted at intervals around both parallel shafts 5a and 5b. A straw cutter B similar to the conventional type is installed in which cylinders 27a and 27b are fitted between plate blades 6a, 6a, 6b, and 6b, respectively, but the front shaft 5a is closer to the rear shaft 5b. The straw cutter 2 is installed so that the end portion 4a of the straw removal chain 4 is visible above the straw cutter 2, and the straw that falls away from the end portion 4a of the straw removal chain 4 is removed by the disk blade 6a. , 6b, both the front and rear guide rods 28 and 29 are vertically installed from above, and the discharge air passage 7 is inclined tangentially from the cross-flow fan 3 and extends to the rear lower part. The tip opening 7a is connected to the upper side of the straw cutter B so as to be substantially orthogonal to the line connecting the axes of the two shafts, and the discharge air passage 7 is provided at the lower rear side of the straw cutter B. The discharge port 8 corresponds to the direction of the extension line from the straw cutter B.
It is constructed by opening diagonally downward.

Therefore, during combine harvester operation, among the grains to be sorted that are threshed in the handling room 1 and then shaken and sorted by the shaker sorter A, the first grain that leaks the grain sheep 17 is sorted by air pressure. number conveyor 22
The second items falling into the second conveyor 24 and leaking from the stroke rack 18 fall onto the second conveyor 24 and are processed. Culm breakage and dust are removed from the upper suction port 25.
The straw waste is sucked in by the suction air from the cross-flow fan 3 and discharged as it is from the discharge air path 7 to the straw cutter B side as shown by the arrow A. On the other hand, the straw waste etc. that are conveyed backward on the straw rack 18 remain as they are. 3
It is sent out to port 14 and discharged outside the machine.

In addition, the straw removal chain carries out the waste straw inherited from the feed chain to the rear, and the waste straw that leaves the terminal end 4a and falls between the guide rods 28 and 29 as shown by the arrow RO is placed in the circle of the straw cutter B. The straw is cut into short pieces by the plate blades 6a and 6b, and in this state, the discharge air flowing in the discharge air passage 7 as shown by arrow A as described above blows against the waste straw falling from above, and the straw is cut into straw cutters B. In addition, the discharged air is blown directly to the straw cutter B, and the cut straw is directly delivered to the top of the field from the lower discharge port 8 as shown by the arrow C. It will be discharged to

That is, the cut straw of each part of the waste straw that is cut sequentially from the culm side to the ear side is dispersed by the discharge wind and distributed over the field, and the straw is wrapped around the cylindrical bodies 27a and 27b of the straw cutter B. Even if you try to do so, it will be blown away by the discharged air and will prevent it from becoming tangled.

As described above, the present invention provides a method for discharging the sorted dust in the threshing section of a combine, which is constructed by installing a cross-flow fan in the upper part of the sorting dust exhaust chamber where the rear part of the oscillating sorter extending from the bottom of the handling chamber is visible. A straw cutter is installed below the terminal end of the straw removal chain that extends above the chamber, and consists of two shafts each fitted with a large number of disc blades, mounted parallel to the front and rear heights. , a discharge air passage extending tangentially from the cross-flow fan toward the rear lower part thereof is connected and connected so as to be perpendicular to a line connecting the axes of the two shafts when viewed from the side; The lower rear side of the straw cutter is configured with a discharge port opening diagonally downward, which corresponds to the direction of the extension from the discharge air path through the straw cutter, so that the waste straw falling from the terminal end of the straw removal chain can be removed. This means that the straw can be fed to the straw cutter reliably and smoothly while blowing the discharge air from the discharge air path well, and each cut from the culm side to the tip side, which is sequentially cut by the straw cutter, can be accelerated. The straw receives the discharge air directly from the discharge air path without changing the air path, and is dispersed before being released into the field. As the straw is dispersed, post-processing can be performed well, and even if the straw tries to wrap around the straw cutter, it will be blown away by the discharge air from the discharge air path, effectively preventing the straw from wrapping around the straw cutter. It has the advantage of being able to be implemented conveniently with a simple structure.

[Brief explanation of the drawing]

The drawing is a side sectional view of a threshing section that is an embodiment of the present invention. 1... Handling room, A... Oscillating sorting body, 2... Sorting dust removal room, 3... Cross flow fan, 4... Straw removal chain,
5a, 5b...Shaft, 6a, 6b...Disc blade, B...
...Straw cutter, 7...Discharge air passage, 8...Discharge port.

Claims (1)

[Scope of utility model registration request] In the threshing section of a combine, which is configured by installing a cross-flow fan on the upper part of the sorting dust removal chamber, from which the rear of the oscillating sorting body extending from the lower part of the handling chamber is visible, the upper part of the sorting dust removal chamber is extended. At the lower end of the straw removal chain, a straw cutter is installed, which consists of two shafts each fitted with a large number of disc blades, mounted parallel to each other in the front and rear height, and the straw cutter is installed at the lower end of the straw removal chain. When viewed from the side, a discharge air passage extending toward the rear lower part of the straw cutter is connected in a manner substantially orthogonal to the line connecting the axes of the two shafts, and is connected to the lower rear side of the straw cutter. The cut straw discharge device is characterized in that the discharge port is opened obliquely downward and corresponds to the direction of the extension line from the discharge air passage through the straw cutter.