JP3302964B2 - Rotary screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary screen for cleaning air sent to a radiator.

[0002]

2. Description of the Related Art In recent years, a rotary screen B mounted on an ordinary combine has the structure shown in FIGS.

[0003] As shown in the figure, a rotary cylinder 101 having a filter screen 100 formed of a mesh attached to the front surface is mounted on a screen mounting shaft 102 penetrating the rotary cylinder 101. Are rotatably supported by bearings 103 and 104.

Further, on the outer surface of the filter screen 100, a dust suction duct 105 for sucking and removing dust attached to the outer surface of the filter screen 100 in a fixed state is arranged.

Further, as a driving structure of the rotary screen B, a driving roller 106 is disposed outside the rotary cylinder 101 at a parallel interval, and a V belt or the like is provided between the rotary cylinder 101 and the drive roller 106. A drive belt 107 is wound around the drive belt 106, and the drive roller 106 is connected to a rotating motor (not shown).

With this configuration, the air fed to the radiator can be cleaned through the rotating filter screen 100, and the dust adhering to the filter screen 100 is sucked by the dust suction duct 105 to remove the dust. 100 and can be discharged outside.

[0007]

However, the above rotary screen B still has the following problems.

That is, means for sucking external air into the rotary cylinder through the filter screen and means for sucking dust adhering on the outer surface of the filter screen into the dust suction duct are provided separately. In addition, the structure is complicated and the rotary screen itself is large.

An object of the present invention is to provide a rotary screen capable of solving the above-mentioned problems.

[0010]

SUMMARY OF THE INVENTION The present invention provides a rotary cylinder having a filter screen attached to one end face for removing dust from the air flowing in from the outside, a driving mechanism for rotating and driving the rotary cylinder. A radiator fan attached to a prime mover provided in the machine, wherein the radiator fan is rotated by rotation of the radiator fan. Negative pressure is generated inside the cylinder and inside the dust suction duct, so that external air can be sucked into the rotating cylinder through the filter screen, and dust attached to the outer surface of the filter screen can be sucked into the dust suction duct. It can be sucked in and removed to the outside, and a drive mechanism
Contact the inner peripheral surface of the rotating cylinder and rotate the rotating cylinder
The present invention relates to a rotary screen provided with a moving driving roller .

The present invention is also characterized in that the driving of the prime mover for rotating the radiator fan and the driving of the driving mechanism for rotating the rotary cylinder are simultaneously performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 shows a general-purpose combine C, in which a threshing device 3 and a rocking device 4 are provided on a body 1 driven by a crawler 2, and a reaper 5 is provided in front of the body 1 by hydraulic pressure. A grain tank 7 for storing the grains threshed by the threshing device 3 is disposed beside the threshing device 3 while supporting the ascent and descent via an elevating device 6, and in front of the grain tank 7. A driver's seat 8 and a driving operation unit 9 are provided.

A prime mover 10 is disposed behind the Glen tank 7 as shown in FIGS.
A radiator fan 11a is attached to the outside of the side of the radiator 10, and the radiator 11 is disposed at a position near the radiator fan 11a. In the drawing, reference numeral 13 denotes a discharge unit provided at the rear of the threshing device 3.

The reaper 5 includes a cereal header 21 for taking in uncut culm, a reciprocating drive-type cutting blade 22 mounted between the cereal headers 21, a cereal culling drum 23 and the cereal header 21. It comprises a transport section 24 having a conveyor 25 for transporting the grain stalks cut by the cutting blade 22 to the threshing apparatus 3 and a grain scraping reel 26 supported by the grain header 21.

In the figure, reference numeral 27 denotes an air cleaner of the prime mover 10, and a part of clean air from a clean air supply duct 35 to be described later flows into the air cleaner 27.

Thus, the present invention relates to a rotary screen A provided along the side wall of the box-shaped cover 30 of the threshing apparatus 3 in order to send clean air to the radiator fan 11a in the general-purpose combine C described above. Has features.

That is, as shown in FIGS. 1 and 2, a diamond-shaped cooling air inlet 31 is provided on the side wall of the box-shaped cover 30, and the inlet 31 is provided with a punched metal or a coarse metal mesh. A dustproof body 32 made of the same is detachably attached.

As shown in FIG. 3, inside the side wall of the box-shaped cover 30, a rotary screen installation space 33 provided at a rear portion of the cooling air intake 31 and a front portion of the radiator 11 described above. A clean air supply duct 35 communicating with the provided clean air inflow space 34 is provided.

As shown in FIGS. 2 and 3, a large-diameter ring in which a circular filter screen 40 for removing dust from the air flowing in from the outside is attached to one end face of the rotary screen installation space 33. A rotating cylindrical body 41 is rotatably arranged.

In the rotary cylinder 41, the center of the filter screen 40 is connected to a cylinder support shaft 43 via a mounting plate 42.
The cylindrical body support shaft 43 has one end rotatably supported by a bearing 44 provided at the center of the dustproof body 32 and the other end mounted on the side wall frame 3b of the threshing apparatus 3. It is rotatably supported by a bearing 45 provided on the horizontal frame 3c.

With this configuration, the rotary cylinder 41 can be rotatably disposed in the rotary screen installation space 33. In FIG. 3, reference numeral 41b denotes an outer space of the combine C in the rotary screen installation space 33.
An annular seal for preventing external air from flowing through the outer peripheral surface of the rotary cylinder 41.

Next, a driving mechanism for driving the rotary cylinder 41 will be described. As shown in FIGS. And a driven roller 47 are disposed.

Each of the rollers 46, 47 has a rubber ring 46a, 47a mounted on its peripheral surface.
One peripheral wall portion 41a of the rotary cylinder 41 is sandwiched between 46a and 47a.

In the above-mentioned rotary cylinder 41, a portion located near the driving roller 46 is provided with an arm support shaft 48.
Is protruded from the horizontal frame 3c, and the arm support shaft 48 is provided with the base ends of a pair of roller support arms 49 and 50.
Each is independently and rotatably fitted.

Roller mounting shafts 46b, 47b to which a driving roller 46 and a driven roller 47 are fixed are rotatably supported at the tips of the roller supporting arms 49, 50, respectively.

A tension coil spring 51 as an urging means is interposed between the intermediate portion of the roller support arm 49 and one end of the horizontal frame 3c. Thus, it can be pressed against the inner surface of the peripheral wall portion 41a of the rotary cylinder 41.

On the other hand, the rear extension end 50 of the roller support arm 50
A tension coil spring 52 as an urging means is interposed between a and one end of the horizontal frame 3c, and the spring 52 elastically causes the driven roller 47 to resiliently rotate the peripheral wall portion 41a of the rotary cylinder 41.
Can be pressed.

Therefore, the peripheral wall portion 41a of the rotary cylinder 41 can be pinched by the driving roller 46 and the driven roller 47 with a sufficient pinching force without deformation of the portion.

The imbalance of the clamping force or the pressing force of the rollers 46, 47 is caused by the tension coil springs 51, 52, respectively.
The adjustment can be easily performed by operating the adjustment screws 53 and 54 provided continuously to the motor.

A worm wheel 46c is mounted on the roller mounting shaft 46b of the drive roller 46, as is apparent from FIG. 4, and the worm wheel 46c is mounted on the roller support arm 49 by the drive roller 46. The worm screw 61 attached to the output shaft of the electric motor 60 attached at the separated position meshes.

With this configuration, when the electric motor 60 is driven to rotate its output shaft, the rotational force is transmitted to the roller mounting shaft via the worm screw 61 and the worm wheel 46c.
The drive roller 46 is transmitted to the drive roller 46b and can rotate the drive roller 46 at a large reduction ratio.

Since the driving roller 46 is pressed by the peripheral wall portion 41a of the rotary cylinder 41 in cooperation with the driven roller 47, a sufficient space is provided between the driving roller 46 and the rotary cylinder 41. Friction force is generated. Therefore, the rotation of the driving roller 46 can be reliably transmitted to the rotating cylinder 41, and the rotating cylinder 41 can be surely rotated.

Further, the diameter of the driving roller 46 is
Since the diameter of the rotating cylinder 41 is sufficiently small with respect to the diameter of the rotating cylinder 41, the rotating cylinder 41 can be rotated at an extremely low speed in order to secure a sufficient speed reduction ratio also in this case and to enable the suction of dust described later.

Next, it is provided on the front surface of the rotary cylinder 41,
A dust discharging mechanism for sucking dust attached to the front surface and removing the dust to the outside will be described.

As shown in FIGS. 2 and 3, a duct supporting horizontal frame 70 is provided on the front surface of the rotary cylinder 41, and both ends of the frame 70 are fixed to the side walls of the box-shaped cover 30. ing.

On the other hand, a rotating cylinder
A dust suction duct 71 having a start end in the center of the filter screen 40 of 41 and extending the end to one end of the frame 70 is provided, and the end of the dust suction duct 71 is
The dust communication duct 73 is connected to the start end of the dust communication duct 73 through the connection tube 72, and the end of the dust communication duct 73 communicates with the front space 74 formed between the radiator 11 and the radiator fan 11a.

Next, the operation of the rotary screen A having the above configuration will be described with reference to FIGS.

When the prime mover 10 is driven, the radiator fan 11a integrally mounted on the prime mover 10 rotates to generate a negative pressure in the front space 74 of the radiator fan 11a. As a result, as shown in FIGS. 1 and 3, the filter screen 40 of the rotary screen A is used as one air flow.
External air first flows into the rotary cylinder 41 through the rotary cylinder 41.
Such inflow air is clean air from which dust in the external air has been removed, and the clean air then flows into a clean air inflow space 34 provided in the front of the radiator 11 through a clean air supply duct 35, Thereafter, after being used as cooling air for the radiator 11, it is also used for cooling the prime mover 10 through the front space 74.

On the other hand, when a negative pressure is generated in the front space 74 by driving the radiator fan 11a, a negative pressure is generated in the dust suction duct 71 through the dust communication duct 73 to generate a second air flow. Will be. That is, part of the air that has flowed into the rotary cylinder 41 passes through the filter screen 40 of the rotary screen A in the reverse direction and is sucked into the dust suction duct 71, and adheres to the surface of the filter screen 40 during this suction. Garbage can be removed.

By the way, at the same time when the prime mover 10 is driven, the filter screen 40 is rotated by the electric motor 60 to rotate the rotary cylinder 41.
It is rotated at a low speed with
Inside, the dust attached to the surface of the filter screen 40 can be continuously removed by using the suction area of the duct 71 as a unit, and the external air is always clogged and kept within the rotary cylinder 41 within the clogged state. It becomes possible to make it flow.

The air that has flowed into the dust suction duct 71 and mixed with dust flows into the front space 74 that forms the rear of the radiator 11 through the dust communication duct 73, and flows into the front space 74 through the radiator 11. After merging with cooling air,
It will be used as cooling air for the prime mover 10.

[0043]

According to the first aspect of the present invention, a radiator fan is attached to a prime mover provided in the machine, and a negative pressure is generated inside the rotary cylinder and inside the dust suction duct by rotation of the radiator fan. Thus, external air can be sucked into the rotary cylinder through the filter screen, and dust attached on the outer surface of the filter screen can be sucked into the dust suction duct and removed to the outside.

In this manner, the external suction air can be sucked into the rotary cylinder body and the dust can be sucked into the dust suction duct by utilizing the rotation suction force of the radiator fan. And the rotary screen itself can be made compact. As a driving mechanism, there is provided a driving roller which comes into contact with the inner peripheral surface of the rotary cylinder and rotationally drives the rotary cylinder. Therefore, since the inner peripheral surface of the rotary cylinder is directly driven by the drive roller, the rotary cylinder can be reliably rotated with low torque. In addition, the driving roller can be housed compactly in the rotating cylinder, and the rotary screen itself can be made compact. As a result, the rotary screen can be installed at any location.

In the present invention, the driving of the prime mover for rotating the radiator fan and the driving of the driving mechanism for rotating the rotary cylinder are simultaneously performed.

As described above, when the radiator fan is driven to rotate, the rotary cylinder also rotates at the same time.
External air is reliably sucked into the rotary cylinder through the filter screen by the rotational suction force of the radiator fan, and dust attached on the outer surface of the filter screen is reliably sucked into the dust suction duct and eliminated to the outside. You.

Therefore, it is not necessary to perform the operation of rotating the rotary cylinder and the operation of operating the dust suction duct one by one.
All of these operations can be automatically performed only by rotating the radiator fan.

[Brief description of the drawings]

FIG. 1 is an overall front view of a combine having a rotary screen driving structure according to the present invention.

FIG. 2 is an enlarged front view of the rotary screen.

FIG. 3 is a cross-sectional plan view of a main part of the rotary screen taken along line II of FIG. 1;

FIG. 4 is an enlarged explanatory view of a drive mechanism of a drive pulley.

FIG. 5 is a perspective view of a conventional rotary screen driving structure.

FIG. 6 is a sectional side view of the same.

[Explanation of symbols]

 40 Filter screen 41 Rotating cylinder 41a Peripheral wall 46 Drive roller 46a Rubber ring 47 Followed roller 49 Roller support arm 50 Roller support arm

Claims (2)

(57) [Claims] 1. A rotary cylinder (41) having a filter screen (40) attached to one end face for removing dust from the air flowing from the outside, and a drive mechanism for rotating the rotary cylinder (41). And a dust suction duct (71) for sucking dust adhering to the outer surface of the filter screen (40) of the rotary cylinder (41), wherein a radiator is provided to a motor (10) provided in the machine. Attach the fan (11a) and rotate the radiator fan (11a)
A negative pressure is generated inside the rotary cylinder (41) and inside the dust suction duct (71), and external air can be sucked into the rotary cylinder (41) through the filter screen (40), The dust adhering to the outer surface of the filter screen (40) is sucked into the dust suction duct (71) and can be removed to the outside, and as a drive mechanism , comes into contact with the inner peripheral surface of the rotary cylinder (41), same
A rotary screen provided with a driving roller (46) for rotatingly driving a rotating cylinder (41) . 2. The driving device according to claim 1, wherein the driving of the prime mover for rotating the radiator fan and the driving of the driving mechanism for rotating the rotary cylinder are simultaneously performed. Rotary screen.