JPH0620366Y2 - Chaff sheave in thresher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a chaff sheave provided in a rocking sorting device in a threshing device for a combine or the like.

(B) Conventional Technology A chaff sheave provided with a threshing device has been conventionally known.

For example, Japanese Utility Model Publication No. 58-7535 and Japanese Utility Model Publication No. 56-
Japanese Patent No. 43350 is publicly known.

There is a constant distance between the chaff fins of these chaff sheaves from front to back, and the chaff fin angle and leakage gap can be changed by pivotally supporting the fin gap upper end and pivoting the fin lower end as described above. However, the distance between the chaff fins in the front portion and the distance between the chaff fins in the rear portion were constant in any case.

(C) Problems to be solved by the device However, the paddy and straw scraps leaked from the crimped net after threshing are
As it is sifted on the chaff sieve in the rocking sorter, the paddy is separated into the lower layer and the straw debris into the upper layer,
And, the straw waste is sent backward by the swing.

That is, in the front of the chaff sheave, the layer of paddy and straw debris is thick, but as it goes backward, the paddy is leaking from between the chaff fins and the layer becomes thin.

Therefore, if the distance between the chaff fins is the same on the front side and the rear side, the play becomes large at the thin rear end of the layer, variation occurs in the distance, and the straw layer leaks. Therefore, there was a problem that straw was mixed in the first conveyor for sending fine grains.

(D) Means for Solving the Problem The present invention has the following configuration in view of such a point.

In the chaff sheave 10 attached to the swing sorting device E,
The pivot pins 21a, 21a of the upper pins 10b, 10b, which are the center of rotation of the chaff fins 10a, 10a.
The pitch B of .. is the pivotal support holes 22a, 22a ... Opened in the connecting rod 22 into which the lower pins 10c, 10c.
Of the pivot holes 21a, 21a
The line a connecting the centers of the lines a and the line b connecting the centers of the pivot holes 22a, 22a opened in the connecting rod 22 are set so that the distance between the line b and the line a becomes narrower toward the rear. The gap between the chaff fins 10a and the chaff fins 10a becomes narrower toward the rear.

(E) Embodiment The object of the present invention is as described above, and the structure of the present invention will be described based on the structure of the embodiment shown in the accompanying drawings.

FIG. 1 is a side sectional view of a combine threshing device, FIG. 2 is a perspective view of the same, FIG. 3 is a side sectional view of a rocking and sorting device and a bunting unit, and FIG. 4 is a partially enlarged sectional view of a chaff sheave. .

The overall structure will be described with reference to FIGS. 1 and 2. The handling barrel 2 is arranged in the upper front part of the machine body frame 1 of the threshing device, and the grain culms conveyed by the feed chain are threshed by the handling blade 2a of the rotating handling barrel 2 and provided below the handling barrel 2. Rice grains, straw debris, and the like that have leaked from the crimp net 5 fall on the Glen pan 9 and the chaff sheave 10 of the swing sorting device E.

Further, from the lower grain sieve 11, the fine granules, which have been wind-selected by the Kara Minou fan 6 provided below the rocking sorting device E, fall down on the first conveyor 7 and are laterally fed by the first conveyor 7. , Fried and transported to the Glen tank.

In addition, the straw chips and the branch adhering particles that cannot be leaked from the crimp net 5 and the straw chips and the branch adhering particles that cannot be leaked from the rocking sorter E move backward due to the rocking. The sent fine branch shoot particles fall from the straw rack 13,
Others are sent to the orthogonal processing cylinder 14 and reprocessed.

Further, dust and fine dust on the straw rack 13 are sucked by the suction fans 15 on both sides and discharged to the outside of the machine.

Then, in the thing reprocessed by the orthogonal processing cylinder 14, the straw debris that has fallen from the concave 16 is discharged out of the machine from the third port by the wind from the Kara Tan fan 6, and the branch stem adhered particles and the like are processed by the processing cylinder chaff sheave 17. Then, it falls on the second conveyor 19.

The second material collected on the second conveyor 19 is laterally fed, then sent from the second thrower 20 to the parallel processing cylinder 4 provided in parallel diagonally above the handling cylinder 2 and processed again.

The chaff sheave 10 of the swing selecting device E, which is the main part of the present invention.
Is a chaff fin 10 as shown in FIGS.
a, 10a ... are arranged substantially parallel to each other, and the chaff fin 10a
Is a plate whose lower end is bent in a V shape, and has pins 10b and 10c projecting outwardly on the upper and lower portions on both sides.

The upper pin 10b is inserted into the pivot holes 21a, 21a, ... Opened in the side plate 21 of the swing selecting device E, and the lower pin 10c is inserted.
Are elongated holes 21b, 2 opened in the side plate 21 of the swing sorting device E.
The lower pin 10c which penetrates 1b ... and is further on one side is inserted into pivot holes 22a, 22a.

The line a connecting the centers of the pivot holes 21a, 21a ... Opened in the side plate 21 and the pivot hole 22 opened in the connecting rod 22.
The line b connecting the centers of a, 22a, ... Is not parallel, and the distance between the line a and the line b becomes narrower toward the rear.

Pitches of the pivot holes 21a, 21a ..., That is, pitches B, B of the chaff fin upper pins 10b, 10b.
..And pivot holes 22a, 22a opened in the connecting rod 22 ..
Pitches A, A ... Are equidistant.

However, the pitches A and B are not the same length, but A <B, and the gap between the chaff fins is narrowed toward the rear.

Further, the rotary plate 23 is pivotally supported by the upper pin 10d at the front end of the chaff sheave 10, and the rotary plate 23 is pivotally supported by the lower pin 10e at the front end of the chaff sheave 10 through the connecting rod 22. A spring 24 is locked at the upper end of the rotating plate 23 to urge the chaff fin 10a so as to reduce the inclination angle of the chaff fin 10a to narrow the gap, and a wire 25 is connected to the lower end of the rotating plate 23. The other end of the wire 25 has an opening adjustment lever 26 provided near the driver's seat.
And the angle can be adjusted by the opening adjusting lever 26.

(F) Action of the device With such a structure, when the opening adjustment lever 26 is rotated upward during cutting such as low-speed traveling work with low yield, the connecting rod 22 is lifted and the chaff fins 10a, 1a.
.. 0a ... rotate upwards, the gap between chaff fins becomes narrower, the leakage rate and the amount of leakage of the paddy are reduced, and straw debris and the like are fed on the thin paddy layer.

Further, when the opening adjustment lever 26 is rotated downward during high-speed cutting such as high-speed cutting, the connecting rod 22 is lowered and the chaff fins 10a, 10a ... The gap between the two becomes wider, the leakage rate and the amount of leakage of the paddy increase, and the paddy that drops from the kripun net 5 in large quantities is successively leaked so as not to stay.

Then, on the chaff sheave 10 at the time of sorting, the paddy having a large specific gravity is lowered by the rocking to form a layer of paddy, and a layer of straw dust or the like having a small specific gravity is formed on the paddy, and the upper layer is rocked. Will be sent to the back. At this time, the paddy layer is thicker toward the front and thinner toward the rear, but the gap between chaff fins and chaff fins is narrower toward the rear, so a certain paddy layer can be secured even at the rear. The straw can be prevented from falling. Further, since the line a and the line b are not parallel to each other, backlash is reduced.

(G) Effect of the Invention With the above-mentioned configuration, the present invention has the following effects.

First, the gap between chaff fins was made narrower toward the rear, so a certain layer of paddy can be secured from the front to the rear.
The amount of straw chips falling behind was reduced, and the sorting performance was improved.

Second, since the line connecting the upper pin of the chaf sheave and the line connecting the lower pin are not parallel, the play of the chaf sheave is reduced and the wear of the connecting rod is also reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a combine threshing device, FIG. 2 is a perspective view of the same, FIG. 3 is a side sectional view of a rocking and sorting device and a Karato part, and FIG. 4 is a partially enlarged sectional view of a chaff sheave. E ... Oscillating sorting device 10 ... Chaf sheave 10a ... Chaff fin 10b ... Upper pin 10c ... Lower pin 22 ... Link rod 22a ... Pivot hole

Claims (1)

[Scope of utility model registration request] 1. A chaff sheave 1 attached to a swing sorting device E.
0, which is the center of rotation of the chaff fins 10a, 10a.
a, 21a ... Pitch B, the lower pins 10c, 10
The pivot hole 22a opened in the connecting rod 22 for inserting c ...
22a, which is larger than the pitch A of the pivot support hole 2
Line a connecting the centers of 1a, 21a ...
The line b connecting the centers of the pivot holes 22a, 22a ... Opened to the side is configured such that the distance between the line b and the line a becomes narrower toward the rear, and the gap between the chaff fin 10a and the chaff fin 10a becomes closer toward the rear. A chaff sheave in a threshing device, which is characterized by a narrow configuration.