JPH047706Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a sorting device for a screw-type threshing machine of a full-feed combine harvester.

(Prior art) Generally, in the case of a combine harvester equipped with a screw-type threshing machine, the grain culm, which has been raked by a raking roll and cut by a cutting blade, is transferred from the raking auger to a handling room by a chain conveyor in a feeder house. The grain is transported and threshed using a screw-type handling barrel or rotor.

The threshed grains fall from the crimp net onto the oscillating sorting board, where they are sorted by the sorting wind from the winnowing machine.
Grain falls into the first gutter, and grain falls into the second gutter.

(Problems to be solved by the invention) In the screw-type thresher as described above, leakage from the crimp net at the rotor inlet is as high as approximately 60%, and in the current oscillating sorter feed pan, the feed is sent to the chaff sheave side. They simply lacked the ability to separate straw waste and grain. In addition, when working with wet materials or crops with a lot of weeds, the feed pan has a flat shape, and there is a disadvantage that straw waste with a high moisture content adheres to the feed pan and cannot be fed.

(Means for solving the problem) Therefore, the technical problem of the present invention is to provide a sorting device for a screw-type threshing machine of a full-feed combine harvester that can effectively sort out a large amount of leakage at the rotor inlet. Therefore, the technical means of this proposal to solve this technical problem is to provide an air passage using a pre-cleaning fan between the lower crimp net at the rotor inlet and the feed pan of the oscillating sorting board. An upper chaff sheave is disposed inside the feed pan, and the pre-cleaning fan is configured to blow air into two parts: one that passes through the upper chaff sheave and the other that passes between the feed pan and the upper chaf sheave.

(Example) First, the entire combine harvester equipped with a screw-type threshing device using the present device will be explained.

In FIG. 1, the crops are raked in by a raking reel 1 and cut by a cutting blade 2, and the cut crops are transported from a raking auger 3 to a handling room 6 by a chain conveyor 5 in a feeder house 4, and are transferred to a rotor 7. The grain is threshed. The threshed grains fall from the crimp net 8 onto a swing sorting board 9 and are sorted. This swinging sorting board 9 sorts out the crimp net leakage, but only the long straw is carried toward the rear large mouth 16.

In addition, the materials to be sorted on the swinging sorting board 9 are sorted by the sorting wind by the winnowing machine 11, and the grains are sorted in the first gutter 13.
Then, the second grain falls into the second gutter 14, and the grains that fell into the first gutter 13 are carried to a paddy tank (not shown), and the second grain falls into the second gutter 14.
The grains are conveyed to the swing sorting board 9 via the grain lifting cylinder 15. In addition, 10 in FIG. 1 is a crawler, and 12 is a driver's seat.

By the way, in the above-mentioned screw type threshing, leakage from the crimp net 8 at the rotor inlet is as high as 60%, and in the feed pan 17 of the swing sorting board 9 shown in FIG. They lacked the ability to separate straw waste from grain.

In addition, when working with wet materials or crops with a lot of weeds, the feed pan has a flat shape and has the disadvantage that moisture-rich straw waste adheres to it and cannot be fed. In addition, 25 in FIG. 2 is a grain sieve.

This proposal is an improvement on the above points, and the rotor 7
An air passage A formed by a pre-cleaning fan 19 is provided between the crimp net 8 and the swing sorting board 9 below the inlet, and an upper chaf sheave 20 is disposed within the air passage A.

The air from the pre-cleaning fan 19 is divided into air a ₁ that passes through the upper chap sheave 20 and air a ₂ that passes between the feed pan 17 and the upper chap sheave 20 .

With the above structure, a large amount of leakage at the inlet of the rotor 7 is roughly sorted by the wind on the upper chaff sieve 20, and bulky waste is blown to the large port (third port). Small straw waste that could not be sorted by the upper chaff sieve 20 is sorted again by the wind passing between the feed pan 17 and the upper chaff sieve 20.

Since the wind blows along the feed pan 17, the feed on the feed pan 17 is improved and the accumulation of wet material etc. is eliminated. Therefore, efficiency can be increased while improving sorting performance.

Note that the upper chaff sheave 20 may be formed of a crimp net or a perforated iron plate in addition to the horizontal crosspiece.

In addition, if high efficiency or high moisture work is performed using a machine with a swinging sorting plate 9 below the rotor 7 as shown in FIG. The leakage becomes large and a large amount is sent to the second chaf sheave 21. Therefore, the leakage rate of the second chaf sheave is also mixed with the leakage from the crimp net, and the leakage rate is further reduced.
This will result in a number loss.

If the crosspiece of the second chaf sheave 21 is opened in order to prevent this, a large amount of dust and grains will fall into the second receiving trough 14, resulting in a disadvantage that it is likely to become clogged.

Therefore, as shown in FIG. 4, a sieve rod or vertical stroke rack as shown in FIG. 22 is installed.
The sieve rod or stroke rack 22 has such a length that its starting end faces the furthest side of the receiving trough 13, and its terminal end faces up to the top of the second receiving trough.

When the sieve rod or stroke rack 22 is provided as described above, the terminal end of the first chaf sheave 18 is parallel to the direction of the wind blowing from the winnower 11.
2, the sorting air that blows between the grain sieve 23 and the flow grain board 24 is well-ventilated.
Therefore, efficiency and sorting performance during wet materials are improved, shell grains are most easily collected in the receiving trough 13, and straw waste that is about to fall into the second chaf sieve 21 is also collected in the third large sieve 1.
Blow it to 6, and reduce the amount of 2nd return to 3
It becomes possible to reduce number loss.

(Effects of the invention) According to the present invention, a large amount of leakage at the rotor inlet is roughly sorted by the wind on the upper chaff sieve, and bulky waste is blown away into the large mouth.

Small straw waste that could not be sorted out by the upper chaff sieve is re-sorted by the wind passing between the feed pan and the upper chaff sieve. In addition, since the wind blows along the feed pan, the feed over the feed pan is improved, and therefore, wet material does not adhere to and accumulate on the feed pan, improving sorting performance and increasing efficiency. There is.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the combine showing the proposed device, Figs. 2 and 3 are partial views of the conventional combine, Fig. 4 is a partial view of the improved combine, and Figs. It is a slope view. 6... Handling room, 7... Rotor, 8... Crimp net, 9... Oscillating sorting board, 17... Feed pan,
19...Pre-cleaning fan, 20...Upper chaff sheave.

Claims (1)

[Scope of utility model registration request] An air passage by a pre-cleaning fan is provided between the crimp net below the rotor inlet and the feed pan of the oscillating sorting board, and an upper chaff sheave is disposed within the air passage. A sorting device in a screw-type threshing machine of a full-feed combine harvester, characterized in that the sorting device is configured so that the wind can be blown separately into the air passing through the feed pan and the air passing between the feed pan and the upper chaff sheave.