JPH04370029A - Thresher - Google Patents

Abstract

PURPOSE:To improve the efficiency of a grading operation in a wind-grading chamber by disposing suction fans below a grain stem-feeding opening, the suction fans being used for sucking dusts, etc., between the lower surface of a threshing net and the upper surface of a vibrational grading trellis in the direction reverse to the blowing direction of a blowing chamber. CONSTITUTION:Dust-discharging openings 16, 16 are disposed on both the sides of a front dust-discharging chamber 15, and suction fans 17, 17 are also disposed in the front dust-discharging chamber between the dust-discharging openings. The suction fans 17, 17 produce suction winds between the lower surface of a threshing net 6 and the upper surface of a vibrational grading trellis 14 on the side of a grain stem-feeding opening 7, the suction wind being flown in the direction reverse to a grading wind blown from a blowing chamber 10. Straw dusts, dusts, etc., are sucked into a front dust-discharging chamber, thereby permitting to rapidly discharge the dusts.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing device used in a combine harvester.

0002

[Prior Art] In the conventionally known Japanese Utility Model Application Publication No. 55-45755, a threshing chamber is formed by mainly surrounding the lower surface of the handling drum with a handling net, and a grain culm supply port is provided at one end of the threshing chamber at the other end. A grain culm discharge port is formed in each of the grain culm discharge ports, and a wind sorting room is provided below the threshing room, which has a blowing fan and a swing sorting shelf that blows sorting air from the grain culm supply port side to the grain culm discharge port side. A description of the threshing equipment was given.

0003

[Problems to be Solved by the Invention] The threshed grains threshed by the threshing chamber of the above-mentioned known example are separated by sorting air that is blown backwards, including the grains that fall from the grain culm supply port side and the grains that fall from the grain culm discharge port. Since the sorting was done by the swinging motion of the swinging sorting shelf,
In particular, straw waste that falls on the grain culm supply port side is moved a long distance backwards by the swinging sorting shelf and then discharged, which has a negative impact on wind selection. In addition, to improve sorting efficiency,
Sometimes the threshing chamber is made long in the front and back, but in this case, the influence of straw debris that falls on the grain culm supply opening side is particularly large.

0004

OBJECTS OF THE INVENTION The present invention improves the sorting efficiency in the wind sorting chamber by quickly removing straw debris that falls on the side of the grain culm supply port.

[0005]

[Means for Solving the Problems] Therefore, the present invention mainly surrounds the lower surface side of the handling drum 5 with a handling net 6 to form a threshing chamber 4, and a grain culm supply port 7 is connected at one end of the threshing chamber 4 to the other end. Grain culm discharge ports 8 are respectively formed in the threshing chamber 4, and a blowing chamber 10 and a swing sorting shelf are provided below the threshing chamber 4 for blowing sorting air from the grain culm supply port 7 side toward the grain culm discharge port 8 side. In the threshing device equipped with a wind sorting chamber 9 having A threshing device is provided with a suction fan 17 that sucks air in a direction opposite to the direction of air blowing in the air blowing chamber 10, so that straw waste falling from the grain culm supply port 7 side is suctioned and removed by the suction fan 17. This is what I did.

[0006]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a body frame, 2 a traveling device provided at a position below the body frame 1, 3 a threshing device provided at a position above the body frame 1, 4 is a threshing room, and a handling cylinder 5 that rotates on a horizontal axis is mounted in the threshing room 4. A handling net 6 is provided mainly on the lower side of the handling cylinder 5. A grain culm supply port 7 is formed on one side of the threshing chamber 4, and a grain culm discharge port 8 is formed on the other side.

Reference numeral 9 denotes a wind selection chamber formed below the threshing room 4, and a ventilation chamber 10 is provided below the starting end (front side) of the wind selection chamber 9.
A ventilation fan 11 is provided in the ventilation chamber 10. The ventilation chamber 10 is provided with a ventilation port 12 that opens toward the grain culm discharge port 8, and the sorting air is blown toward a rear dust exhaust port 13 formed at the rear of the wind selection chamber 9. Reference numeral 14 denotes a swinging sorting shelf provided in the wind sorting chamber 9.

[0008] A front dust exhaust chamber 15 is provided below the grain culm supply port 7 of the threshing chamber 4. Front dust extraction chamber 1
5 is provided at a position above the front side of the ventilation chamber 10 (a position diagonally above), and is formed to have approximately the same width as the swing sorting shelf 14. Dust exhaust ports 16, 16 are provided on the left and right sides of the front dust exhaust chamber 15, and suction fans 17, 17 are provided in the front dust exhaust chamber 15 inside the dust exhaust ports 16, 16. The suction fan 17 is provided between the lower surface of the handling net 6 on the side of the grain culm supply port 7 and the upper surface of the swing sorting shelf 14, and is directed toward the front in the opposite direction to the sorting air blown from the ventilation chamber 10. A flowing suction wind is generated to suck straw waste and dust into the front dust removal chamber 15, thereby quickly removing the straw waste.

The suction fan 17 is formed by an axial fan, and has an axis 1 in the left and right direction facing each dust exhaust port 16.
8. A pulley 19 is provided at one end of the shaft 18, and a belt 22 is passed around the pulley 21 fixed to the rotating shaft 20 of the blower fan 11. The upper part of a dust exhaust pipe 23 that protrudes downward is connected to each of the dust exhaust ports 16, and the dust exhaust pipe 2
The lower end of 3 is opened below the body frame 1. In the figure, 24 is the No. 1 conveyor, and 25 is the No. 2 conveyor.

FIG. 3 shows a second embodiment, in which the dust exhaust port 1
6 is formed completely in the width direction on the lower surface side of the front dust exhaust chamber 15, and a cross-flow fan (cross fan) is installed in the front dust exhaust chamber 15 inside the dust exhaust port 16 in a direction perpendicular to the dust exhaust direction. A suction fan 17 formed by a cross-flow fan (also called a cross-flow fan) is provided. The threshing chamber 4 of this embodiment is formed to be a whole-grain culm input type, and in order to input all the grain culms harvested by the reaping section into the threshing chamber 4, a conveying device is installed between the threshing chamber 4 and the reaping section. 27, and a spiral blade 26 is provided on the outer periphery of the handling drum 5 to form a screw type structure. A so-called self-threshing type threshing device that threshes grain with handling teeth may also be used. In the case of a self-threshing type threshing device, a grain culm supply device is provided on the side of the threshing chamber 4. Further, a rear suction fan may be provided at the rear dust outlet 13.

[0011]

[Effect] Next, the effect will be described. Since the present invention has the above-mentioned configuration, the grain culm supplied into the threshing chamber 4 is threshed by the rotating handling drum 5, and the grains threshed from the grain culm leak through the handling net 6 and enter the winnowing chamber 9. The first item is sorted by the sorting air blown from the air outlet 12 toward the rear dust outlet 13 of the air sorting chamber 9 by the air fan 11 of the air chamber 10 and by the swinging of the swinging sorting shelf 14. The second object enters the No. 1 conveyor 24 and is taken out of the machine, and the second object enters the No. 2 conveyor 25.

[0012] At a position below the grain supply port 7 of the threshing chamber 4, there is provided a front dust removal chamber 15 formed to have approximately the same width as the swing sorting shelf 14. Dust exhaust ports 16, 16 are formed on the side, and suction fans 17, 17 are provided in the front dust exhaust chamber 15 inside each dust exhaust port 16, so that the suction fan 17 formed by an axial flow fan When it rotates, between the bottom surface of the handling net 6 on the grain culm supply port 7 side of the threshing room 4 and the top surface of the swinging sorting shelf 14, there is a space between the grain culm discharge port 8 side and the grain culm supply port 7 side. As the suction air flows, the straw and dust that falls on the starting end side of the handling net 6 is sucked and removed into the front dust exhaust chamber 15, and the dust is discharged from the dust exhaust ports 16 on the left and right sides of the front dust exhaust chamber 15. It enters the cylinder 23 and is discharged outside the machine. therefore,
Since straw waste is removed at the initial stage of wind selection in the wind selection room 9, sorting efficiency is improved.

In the second embodiment shown in FIG.
Since a horizontal cross-flow fan 17 is provided in the front dust removal chamber 15 inside the threshing chamber 4, the handling net 6 on the grain culm supply port 7 side of the threshing chamber 4
Suction air flows uniformly in the width direction between the top surface of the swing sorting shelf 14 and the long straw waste falling from the handling net 6 is removed by the cross-flow fan 1.
7, short straw and dust are discharged through the cross-flow fan 17, through the dust exhaust port 16, through the dust exhaust pipe 23, and outside the machine. Therefore, the suction efficiency is improved,
The wind selection efficiency in the wind selection chamber 9 is also improved.

[0014]

[Effects] In the present invention, the threshing chamber 4 is formed by mainly surrounding the lower surface side of the handling drum 5 with a handling net 6, and the grain culm supply port 7 is provided at one end of the threshing chamber 4, and the grain culm discharge port 8 is provided at the other end. A wind sorting room is formed below the threshing room 4 and includes a blowing room 10 and a swing sorting shelf 14 that blows sorting air from the grain culm supply port 7 side toward the grain culm discharge port 8 side. 9, in the threshing device, a lower position on the grain culm supply port 7 side of the threshing chamber 4 is provided with a direction in which air is blown from the air blowing chamber 10 between the lower surface of the handling net 6 and the upper surface of the swing sorting shelf 14. The threshing device is equipped with a suction fan 17 that sucks in the opposite direction to the grain culm supply port 7, so that the straw waste that falls from the grain culm supply port 7 side is suctioned away by the suction fan 17. Among the threshed grains in the chamber 4, the straw that falls from the grain culm supply port 7 side is
The filters are removed by suction to the outside of the machine by the suction fan 17 without being moved backward a long distance by the swinging sorting shelf 14, thereby improving the efficiency of wind selection. In addition, in order to improve the sorting efficiency, the threshing chamber 4 may be made longer in the front and back, but in this case, the straw waste that falls on the grain culm supply port 7 side is removed early, which significantly improves the sorting efficiency. It has the effect of causing

[Brief explanation of drawings]

[Fig. 1] Side view of the entire device.

[Figure 2] Plan view of main parts.

FIG. 3 is a side view of the second embodiment.

[Fig. 4] Plan view of main parts.

[Explanation of symbols]

1... Airframe frame, 2... Traveling device, 3... Threshing device, 4...
Threshing room, 5... Handling cylinder, 6... Handling net, 7... Grain culm supply port, 8... Grain culm discharge port, 9... Wind selection room, 10... Ventilation chamber, 11... Ventilation fan, 12... Ventilation port, 13... Rear dust exhaust port, 14... Rocking sorting shelf, 15... Front dust exhaust chamber, 16... Dust exhaust port, 17... Suction fan, 18... Shaft, 19... Pulley, 20... Rotating shaft, 21... Pulley, 22... Belt, 23...Dust exhaust tube, 24...No. 1 conveyor, 25...No. 2 conveyor, 26... Spiral blade, 27... Conveying device.

Claims (1)

[Claims] Claim 1: A threshing chamber 4 is formed by mainly surrounding the lower surface side of the handling drum 5 with a handling net 6, and a grain culm supply port 7 is formed at one end of the threshing chamber 4, and a grain culm discharge port 8 is formed at the other end of the threshing chamber 4. Below the threshing room 4, there is provided a wind sorting room 9 which includes a blowing room 10 that blows sorting air from the grain culm supply port 7 side toward the grain culm discharge port 8 side and a swing sorting shelf 14. In the installed threshing device,
At a lower position on the grain culm supply port 7 side of the threshing room 4, there is a suction device for sucking between the lower surface of the handling net 6 and the upper surface of the swing sorting shelf 14 in a direction opposite to the direction of air blowing from the blowing chamber 10. fan 1
7, so that straw waste falling from the grain culm supply port 7 side is suctioned and removed by the suction fan 17.