JP3044157B2 - Axial threshing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axial threshing apparatus characterized by a receiving net structure.

[0002]

2. Description of the Related Art Conventionally, in an axial flow threshing apparatus, the spacing between a handling cylinder and a receiving net disposed opposite to a lower half thereof is made substantially constant over the entire circumference, and efficient even when the amount of processed material is small. The distance between the receiving net and the cylinder was relatively narrow so that threshing could be performed.

[0003]

However, when the threshing material is large or wet, the material coming from a large space on the top of the handling room along with the rotation of the handling cylinder causes the receiving net and the handling cylinder to rotate. The threshing load tends to be overloaded due to the resistance when entering the gap, and there is room for improvement in terms of reducing the threshing load. An object of the present invention is to enable efficient threshing even when the amount of processed material is small, while receiving and handling the processed material coming from the handling room top plate side when the threshing processed material is large or wet. To suppress an increase in threshing load caused by entry into the gap.

[0004]

According to a characteristic feature of the present invention, a receiving net is disposed so as to face a lower half of a handling cylinder, and an outer peripheral surface of the lower half of the handling cylinder is connected to the receiving net. With the gap near the lower position of the rotation axis of the handling cylinder as a boundary, the maximum interval on the upper side is set larger than the maximum interval on the lower side in the rotation direction, and the rotation direction on this upper side The point is that it is set to gradually narrow down to the lower side.

[0005]

In other words, even if the clearance between the receiving net portion located on the lower side in the rotation direction of the handling cylinder and the handling cylinder is set to be narrow so that threshing can be performed efficiently even when the amount of processed material is small, the rotation of the handling cylinder can be achieved. Since the gap between the receiving net portion and the handling cylinder located on the upper side in the direction is set to a maximum interval larger than the maximum interval on the lower side, even if there are many threshing products or wet, the handling room top plate The processed material coming from the side can smoothly enter the gap between the receiving net and the handling cylinder. Therefore, it is possible to sufficiently suppress the increase in threshing load caused by poor entry of the processed material into the gap between the receiving net and the handling cylinder, and thereafter, the material is sent to the lower side while gradually narrowing the interval to perform appropriate threshing processing. Becomes And the decrease in processing efficiency due to the increase in the interval to avoid a sudden increase in the load in the first half of the lower half of the handling cylinder makes the interval in the second half of the lower half of the handling cylinder narrower than the interval in the first half. As a result, the processing efficiency is improved, so that an apparatus having good processing performance as a whole can be obtained.

[0006]

As a result, while threshing can be performed efficiently even when the amount of the processed material is small, threshing due to entry of the processed material into the gap between the receiving net and the handling cylinder when the threshing material is large or wet is achieved. It has become possible to provide an axial-flow threshing apparatus which is capable of effectively suppressing an increase in load and which is more excellent in threshing performance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, an axial-flow threshing device of a whole-culm-in type combine is constituted by a handling room communicating with a feed conveyor 1 for supplying grain culms from a cutting unit on the left side of the drawing. 2 is formed in the upper part of the case, a sorting unit 3 is arranged below the handling room 2, and a receiving net 4 that supplies kernels from the handling room 2 to the sorting unit 3 is opposed to the lower half of the handling drum 5. It is arranged.

The handling cylinder 5 is rotatably supported in the front and rear direction so as to be able to be driven and rotated. A spiral tooth 6a is attached to the outer peripheral surface of the handling cylinder 5 over its entire length. The dust handling valve 6 is attached to the handling chamber top plate 10 to which the handling teeth 6b are attached, and which guides the workpiece in the axial direction of the handling cylinder along with the rotation in the handling cylinder circumferential direction.

The gap 11 between the outer peripheral surface of the lower half of the handle cylinder 5 and the receiving net 4 is located on the lower side in the rotation direction with respect to the vicinity of a position below the rotation axis of the handle cylinder 5. The maximum interval on the better side is set to be larger than the maximum interval of, and the upper side is set so as to gradually narrow toward the lower side in the rotation direction. That is, the handling cylinder 5 of the receiving network 4
The clearance 11 between the portion 4a located on the upper side in the rotation direction and the handling cylinder 5 is set at a relatively large interval, for example, the receiving net 4 and the independent handling teeth 6
In the case where the threshing processing material is large or wet, the processing material that has come from the handling room top plate 10 side is set to the gap 11 between the receiving net portion 4a and the handling cylinder 5 even when the threshing processing material is large or wet. It is configured to smoothly enter and suppress an increase in threshing load due to entry of the processed material between the receiving net 4 and the handling drum 5. Then, the gap 11 between the receiving net 4 and the handling cylinder 5 is
It is gradually narrowed to the lower side in the rotation direction of the handling cylinder 5, and near the lower part of the rotation axis of the handling cylinder 5, the receiving net 4 and the independent handling teeth 6 b
, For example, and about 7 mm, and the gap between the receiving net portion 4b located further on the lower side in the rotational direction and the handling cylinder 5 is also narrowed from near the lower part of the rotation axis of the handling cylinder 5 in the same manner. It is configured so that threshing can be performed efficiently even when the amount of processed material is small.

The sorting section 3 is provided with an oscillating sorter case 3a, a plate fan type wind filter 3b, a first item collecting screw conveyor 7, and a second item collecting screw conveyor 8, which are leaked and supplied from the receiving net 4. The processed material is sieved and air-sorted while being rocked backward by the rocking sorting case 3a, and the grains are sent from the screw conveyor 7 for collecting the first material to a Glen tank (not shown), and the second grain is not sufficiently sorted. The material is returned from the second material recovery screw conveyor 8 to the front of the swing sorting case 3a by a reduction device (not shown).

As shown in FIG. 3, the rotating shaft 12
In addition, an auxiliary fan 14 that draws in air from the engine 13 and supplies air to the car 3b is provided to increase the amount of sorted air.

As shown in FIG. 1, a transmission 15 for speed change and manual operation is provided at the front end side of the handling cylinder 5. To configure the transmission 15, as shown in FIG.
6, an intermediate shaft 17 is interlocked with a bevel gear 18, and the intermediate shaft 1
7 always engages the large-diameter gear 21 of the transmission shaft 20 with the gear 19, and outputs the shift gear 22 including gears 22a and 22b that can be selectively engaged with the large-diameter gear 21a and the small-diameter gear 21b fixed to the transmission shaft 20. The handle 23 is spline-fitted to the shaft 23 so as to be freely shiftable, and the handling cylinder 5 is driven at a high speed when targeting rice or the like, and at a low speed when targeting wheat or the like. The shift gear 22 is provided with a worm wheel 24, and the transmission case 25 is provided with a worm gear 26 in which the worm wheel 24 engages only when the shift gear 22 is operated in a neutral shift. Is configured so that the handling cylinder 5 can be artificially rotated at a large reduction ratio by rotating the, and when clogging in the handling room is removed,
The handling cylinder 5 can be turned over by hand.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view of an axial flow threshing apparatus.

FIG. 2 is a vertical front view of the threshing unit.

FIG. 3 is a cross-sectional view showing a part of Karino.

FIG. 4 is a schematic plan view of a transmission for manipulating a gear shift and manual operation.

[Explanation of symbols]

 4 Receiving net 4a Receiving net portion 5 Handling cylinder 11 Clearance

Continuation of the front page (72) Inventor Shoichi Nakaya 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A 4-28039 (JP, U) JP-A 5-7046 ( (JP, U) Japanese Utility Model Sho 62-169937 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01F 12/24

Claims (1)

(57) [Claims] 1. A receiving net facing a lower half of a handling cylinder (5).
(4) and the lower half of the handling cylinder (5)
The gap (11) between the outer peripheral surface of the part and the receiving net (4) is
(5) Starting from the position near the lower position of the rotation axis,
Also the maximum distance on the upper side than the maximum distance on the lower side in the rotation direction
Set a large gap, and turn the rotation direction
An axial flow threshing device that is set to gradually narrow down to the lower side .