JPH0221896Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for sorting threshed grain in a threshing machine mounted on a combine harvester or of a stationary type.

[Conventional technology]

Conventionally, this type of sorting device is provided with a swinging sorting mechanism that extends in the axial direction of the handling cylinder and swings back and forth below the handling chamber, while a swing sorting mechanism is provided below the starting end of the swinging sorting mechanism. It is well known that the Karakin fan was equipped with a suction fan for dust removal at the upper end of the fan (for example, the
49-5027, etc.).

[The problem that the idea attempts to solve]

However, the conventional oscillating sorting mechanism here requires a feed pan and grain sieve for sorting threshed grains during threshing, and a stroke rack or chaf sieve for sorting waste during threshing. In addition, since two fans, a Karasaki fan and a suction fan, are required, the structure is not only extremely complicated, but also large and weighty. There is a problem in that a large drive power is required to drive both fans, and large vibrations and noise are generated by the swinging of the swinging sorting mechanism and the driving of both fans.

The present invention uses a cylindrical mesh cylinder or perforated cylinder for sorting grain threshing, thereby simplifying the structure, reducing size and weight, reducing driving power, and reducing vibration and noise. The purpose is to reduce the amount of waste and improve the sorting ability and sorting accuracy.

[Means to solve the problem]

In order to achieve this objective, the present invention has a sorting cylinder mounted at the bottom of a handling chamber containing a handling cylinder so that the axis of the sorting cylinder extends approximately horizontally. A net or perforated plate that allows only grains to pass through is stretched around the outer circumferential surface of the cylinder, and the air inside the cylinder is sucked into the atmosphere on one of the left and right sides of the cylinder. A suction chamber with a suction fan configured to emit water is provided to extend in the axial direction of the sorting cylinder, and the sorting cylinder is further provided with a suction chamber that rotates in a direction in which the upper surface of the sorting cylinder moves in the direction of the suction chamber. A driving means is provided between the sorting cylinder and the handling chamber, and a guide means is provided between the sorting cylinder and the handling chamber to guide the threshed grains from the handling chamber to the outer peripheral surface of the sorting cylinder.
A grain receiving gutter is provided below each of the sorting cylinders,
In addition, the supply port for the sorting cylinder in the guiding means is located at a position opposite to the suction chamber with respect to the axis of the sorting cylinder, and the supply port is connected to the axis of the sorting cylinder. A configuration is adopted in which a dispersion spiral is provided that rotates around approximately parallel axes.

[Functions and effects of the idea]

In this configuration, the threshed grains that have fallen from the handling chamber are guided to the outer circumferential surface of the net or perforated plate stretched over the sorting cylinder through the guiding means, and the grains and small dust from the threshed grains are removed. Passing through a screen or perforated plate, the dust enters the sorting cylinder, and the dust is sorted out by riding the air flow from the sorting cylinder to the suction chamber, and the grains enter the grain receiving gutter below the sorting cylinder. After entering, it is ejected from the aircraft.

On the other hand, large straw waste etc. from the threshed grains from the handling room do not enter the sorting cylinder through the screen or perforated plate of the sorting cylinder, but remain attached to the surface of the screen or perforated plate in the sorting cylinder. It moves into the suction chamber due to the rotation of the body, and due to the centrifugal force accompanying the rotation of the sorting cylinder and the flow of air from the sorting cylinder to the suction chamber,
After peeling off from the surface of the screen or perforated plate, it is discharged from the suction chamber to the outside of the machine via the suction fan, so it is possible to prevent clogging of the screen or perforated plate in the sorting cylinder. Can be reduced.

As described above, the present invention sorts the threshed grains from the handling chamber by rotating the sorting cylinder and suctioning the suction fan. Compared to a system that requires two fans, it has a simpler structure, is smaller and lighter in weight, and, in addition to rotating the sorting cylinder,
Since it is only necessary to drive one suction fan, it is possible to significantly reduce vibration and noise, as well as achieve a significant reduction in driving power.

Moreover, in the case where the rotary sorting cylinder is used for sorting grains in the present invention, as mentioned above,
A suction chamber with a suction fan is formed on the side of the sorting cylinder so as to extend in the axial direction of the sorting cylinder, while the upper surface of the sorting cylinder moves in the direction of the suction chamber. By using a structure that includes a driving means that rotates in the direction of When moved indoors, the sorting tube can be removed from the mesh or the perforated plate by the air flowing from the sorting tube toward the suction chamber and the centrifugal force accompanying the rotation of the sorting tube. It can significantly reduce clogging that occurs in the mesh or perforated plate in the body,
Sorting work can be continued for long periods of time.

Furthermore, the present invention has a structure in which the supply port to the sorting cylinder in the guiding means is located at a position offset from the axis of the sorting cylinder on the side opposite to the suction chamber, so that the supply port from the supply port Since the distance to the sorting chamber becomes longer, the circumferential length of the portion of the outer peripheral surface of the sorting cylinder that can be used for sorting can be increased.

In addition, the present invention provides a dispersion spiral at the supply port to the sorting cylinder in the guiding means, so that grain threshing from the handling chamber can be carried out approximately at various points along the axis of the sorting cylinder. It is possible to disperse the grains in a uniform state, prevent the threshing layer on the surface of the screen or perforated plate in the sorting cylinder from becoming locally thick, and substantially average it out. In this way, in combination with being able to increase the circumferential length of the portion of the outer peripheral surface of the sorting cylinder that can be used for sorting, the sorting accuracy and sorting ability can be greatly improved.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a machine frame of a threshing machine;
A handling chamber 2 divided inside the machine frame 1 is equipped with a handling barrel 3 whose axis is approximately horizontal, and a lower part of the handling barrel 3 is provided with an opening on the opposite side from the grain culm entrance 4 to the handling chamber 2. A crimp net 6 is stretched except for the dust inlet 5, and
A feed chain 7 is provided on the upper side surface of the machine frame 1 to convey the grain from the grain inlet 4 along the handling barrel 3.

Reference numeral 8 indicates a suction chamber formed at the lower side of the handling chamber 2 so as to extend in a direction substantially parallel to the axis of the handling cylinder 3, and within the suction chamber 8 is a cross-flow fan 9.
is provided with its axis substantially parallel to the axis of the handling cylinder 3, and the length of the cross-flow fan 9 in the axial direction is approximately the same as the length of the handling cylinder 3 in the axial direction, After the air in the machine frame in the lower part of the handling chamber 2 is sucked, it is configured to be discharged to the outside of the machine from a dust discharge passage 10 provided on the side surface of the suction chamber 8.

Reference numeral 11 designates a sorting cylinder made of a cylindrical mesh 12 that allows only grains to pass through the outer circumferential surface. The sorting cylinder 11 is rotatably supported by a support shaft 14 arranged at the lower part so as to be substantially parallel to the axis of the handling cylinder 3, and the sorting cylinder 11 has an upper surface. Driving means such as a pulley 16 that is rotatably driven in a direction of movement toward the suction chamber 8 is provided.

The upper surface of the sorting cylinder 11 and the handling chamber 2
A guiding means 17 configured as a hopper is provided between a pair of left and right inclined plates 18, 18', and a supply port at the lower end of the guiding means 17 is connected to the sorting cylinder 1.
1, the supply port is positioned closer to the suction chamber 8 than the axis of the sorting cylinder 11.
A dispersion spiral 19 that rotates around an axis that is substantially parallel to the axis of the sorting cylinder 11 is provided at this supply port, located at a position that is shifted by an appropriate dimension on the opposite side.

Since most of the threshed grains falling from the crimp net 6 in the handling chamber 2 are from the grain culm entrance 4 to about one third of the length along the axis of the handling drum 3, the dispersing spiral 19 , there is a screw blade 2 whose twist direction is reversed at approximately one-third of the portion.
0.20' for threshing at the feed port,
configured to be distributed in the axial direction.

Further, below the sorting cylinder 11, the sorting cylinder 11
A grain receiving trough 22 having a screw conveyor 21 extending in the axial direction is provided, and an end of the grain receiving trough 22 communicates with a grain lifting cylinder 23.

Furthermore, inside the sorting cylinder 11, there is an inner cylinder 13 formed into a mesh that does not pass grains.
The inner cylindrical body 13 is rotated in the opposite direction to the sorting cylindrical body 11 by a pulley 15 fixed to the support shaft 14, and the outer periphery of the inner cylindrical body 13 is There are multiple fins 24 on the surface.
is provided so as to extend in the axial direction.

In this configuration, threshed grains such as grains and straw waste threshed by the handling drum 3 from the grain culm being transported in the feed chain 7 are collected at the supply port at the lower end by the guiding means 17, At this supply port, the dispersion spiral 19 distributes the liquid so that it is approximately uniform at various locations in the axial direction, and then the sorting cylinder 1
It is guided to the outer peripheral surface of 1.

In this way, the grains and small dust among the threshed grains guided to the outer peripheral surface of the sorting cylinder 11 pass through the mesh 12 and enter the sorting cylinder 11, while the straw larger than the grains enters the sorting cylinder 11. The waste remains on the surface of the screen 12 and is carried into the suction chamber 8 as the sorting cylinder 11 rotates.

At this time, the cross flow fan 9 in the suction chamber 8
Since the suction air from inside the sorting cylinder 11 passes through the mesh of the mesh 12 from the inside to the outside, the small dust that has entered the sorting cylinder 11 rides on the suction air to the suction chamber 8. The screen 1 is sorted by being sucked into the suction chamber 8 from inside the sorting cylinder 11.
The straw waste on the surface of the screen 12 is also removed from the surface of the screen 12 by the suction wind that passes through the mesh of the screen 12 from the inside to the outside of the screen 12 from inside the screen 11 and the centrifugal force accompanying the rotation of the screen 11. After being separated, the dust is discharged outside the machine from the dust discharge passage 10 via the cross-flow fan 9. On the other hand, the grains that have entered the sorting cylinder 11 pass through the mesh 12 again and fall into the grain receiving trough 22 below.

It goes without saying that instead of the net 12 stretched over the outer peripheral surface of the sorting cylinder 11, a perforated plate may be stretched over the outer peripheral surface of the sorting cylinder 11.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a threshing machine, and FIG. 2 is a sectional view taken along the - line in FIG. 1. 1... Machine frame, 2... Handling room, 3... Handling trunk, 6...
Crimp net, 7... Feed chain, 8... Suction chamber, 9... Cross flow fan, 11... Sorting cylinder, 1
7...Guiding means, 18, 18'... Inclined plate, 19
... Dispersion spiraler, 22 ... Grain receiving trough.

Claims (1)

[Scope of utility model registration request] A sorting cylinder is installed in the lower part of the handling chamber containing the handling cylinder so that the axis of the sorting cylinder extends approximately horizontally, so that only grains pass through the outer peripheral surface of the sorting cylinder. A cylindrical net or perforated plate is stretched,
A suction chamber with a suction fan configured to suck the air inside the sorting cylinder and release it to the atmosphere is provided on one side of the left and right sides of the sorting cylinder so as to extend in the axial direction of the sorting cylinder, and further , the sorting cylinder is provided with a driving means configured to rotate in a direction in which the upper surface of the sorting cylinder moves in the direction of the suction chamber, and a handling chamber is provided between the sorting cylinder and the handling chamber. A guiding means for guiding the threshed grains from the grains to the outer peripheral surface of the sorting cylinder is provided below the sorting cylinder, and a grain receiving gutter is provided in each case, and the guiding means supplies the grains to the sorting cylinder. The supply port is provided with a dispersion spiral that rotates around an axis substantially parallel to the axis of the sorting cylinder, and the supply port is located at a position offset from the axis of the sorting cylinder on the opposite side of the suction chamber. A sorting device for a threshing machine characterized by: