JP2004097164A - Thresher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a crossflow fan of a thresher for a combine harvester, or the like, enabling easy assembly, having light weight and high rigidity and suppressing the generation of unthreshed head and free grain over rack in the threshing of a culm with a threshing drum during the transportation in inside of a threshing chamber by a feed chain. <P>SOLUTION: A blower fan 71 is placed in the threshing chamber 28 at a side of the threshing drum 21 and above the feed chain 9 and air is blown against the root of the culm transported by the feed chain 9. The crossflow fan 80 is used as the blower fan 71. The crossflow fan 80 is composed of two side plates 75, 75 formed by opening a plurality of fin-insertion holes 79 on a circular disk plate on the same circle, one or multiple reinforcing plates 76 having the shape same as the side plates 75, 75 and arranged parallel to each other, and a plurality of blade-shaped fins 77 inserted into a plurality of the fin-insertion holes 79 formed on the side plates 75, 75 and the reinforcing plate 76. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cross flow fan provided in a threshing apparatus such as a combine and the like and a structure thereof.
[0002]
[Prior art]
Conventionally, a feed chain has been installed in the mouth that opens continuously from the grain stalk entrance and grain stalk outlet of the handling room, and a drum-shaped handling cylinder that has a plurality of teeth on the outer periphery is provided with a receiving net. 2. Description of the Related Art A threshing apparatus having a structure in which a stalk transported in a handling room by a feed chain is threshed by being rotationally driven in a threshing direction in a handling room.
For example, in the combine, the grain stalks that are cut by the reaping unit and conveyed by the feed chain, the grain stalks that are about to stagnate at the handling room entrance side of the handling room, are easy to enter the handling room in the retreating position with the ears delayed, For this reason, when the tip of the spike comes into contact with the toothed teeth and is rapidly threshed, the spike is strongly shaken, so that there are disadvantages such as a large number of spikes and straw chips.
[0003]
Therefore, in the technique described in Patent Document 1, the compressed air is radially discharged from the inside of the handling cylinder by an air compressor to extend the tip of the grain culm to be conveyed, and from the upper side in the threshing direction of the handling cylinder. By blowing air toward the lower side, the rectification of the cereal stalk is aimed at, and the cut of the ear is reduced.
Further, in the technique described in Patent Document 2, a comb-shaped ear-cutting direction guide plate is provided inside the handling room cover to guide the ear-cutting grains to be easily re-threshed, and a rear portion of the handling room cover. At the lower end, a brush-like stab-removal body is provided, and the stab-removal body removes the thresh of the cereal stalk conveyed by the feed chain, thereby threshing and leaving the stalk to adhere to the stalk. The removal of stinging particles is attempted. Further, in the technique described in Patent Document 3, in addition to the structure described in Patent Document 2, a stinging grain prevention plate is provided to remove stinging grains adhering to a grain stem generated by cutting of ears.
[0004]
In addition, the conventional cross flow fan has a generally circular side plate disposed on both sides, and a number of blade-shaped fins are laid across the circumferential portion in a substantially radial direction between the side plates, and are driven to a central portion of the side plate. A shaft is provided, and by rotating the drive shaft, suction is performed from one side in a substantially diametric direction and discharged to the other side in a substantially diametric direction.
In a cross flow fan, it is often long in the axial direction, and since each fin is formed thin for weight reduction, a reinforcing member called a partition plate or a reinforcing plate is interposed between the side plates. By doing so, the rigidity is improved.
[0005]
For example, in the cross flow fan described in Patent Document 4, fins having a length between the partition plates (reinforcement plates) are used, and fins are connected by the partition plates to form a long cross flow fan. The rigidity is maintained by shortening the length of the fin.
In addition, although a plurality of fins are provided in one crossflow fan, there is a problem in that if the mounting positions of the respective fins and the side plates are shifted, the performance of the fans varies. In view of this, a technique has been proposed in which a fin is connected with a partition plate so as not to cause displacement or twisting. For example, a cross-flow fan described in Patent Literature 1 is proposed. In this technique, a plurality of blades are erected along an annular partition plate along the shape of the partition plate to constitute one unit, and the first partition plate faces the outer peripheral portions of the tips of the plurality of blades. A groove is provided, and the blades of adjacent units are housed in the groove so that the outer peripheral portion of the tip is accommodated and connected in order, eliminating twisting of the blade and displacement of each unit, and extending in the axial direction. It constitutes a cross-flow fan that is long.
[0006]
[Patent Document 1]
JP 2001-169647 A
[Patent Document 2]
Japanese Utility Model No. 2571363
[Patent Document 3]
JP-A-10-295180
[Patent Document 4]
JP-A-10-295181
[0007]
[Problems to be solved by the invention]
However, according to the techniques described in Patent Literatures 2 and 3, the stinging grain removal body and the cutting edge direction guide plate can reduce the stinging grain and the cutting ears, but the grain stalks conveyed by the feed chain. When the amount of corn is large, there is a possibility that a problem that the treatment cannot be performed with these alone and the loss of grain increases may occur.
In addition, in the technology described in Patent Literature 1, although the cut grains of ears are reduced by rectifying the grain culm, equipment such as an air compressor is required, and the handling cylinder itself has a special structure. It would be difficult to keep product costs low.
[0008]
Further, in the structure of the cross flow fan, if the fins are fixed by welding between the partition plates, the assembling work steps are complicated and complicated, and it is disadvantageous for the cross flow fan for which it is desired to reduce the weight. It is. In addition, since a load is applied to the fixing portion between the fin and the partition plate, it is necessary to sufficiently fix the portion by welding, and the fin and the partition plate can be screwed with a bolt or the like, but the load of the bolt is added. As a result, the weight of the fan increases. When the weight of the fan increases, a large torque is required at the time of starting the fan, which causes a problem that a load is applied to the drive system.
[0009]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0010]
That is, in the threshing apparatus according to claim 1, the handling chamber is provided in a handling chamber which is covered with a handling cylinder cover at an upper part, and threshing is performed while conveying grain culms by a feed chain in the handling chamber. A fan capable of blowing air over a width substantially equal to the axial length of the handling cylinder is provided further above and on the side of the handling cylinder, and the fan is blown toward the root side of the grain stem.
[0011]
According to a second aspect of the present invention, in the threshing apparatus according to the first aspect, the fan is a cross-flow fan, and the rotation axis direction thereof is disposed at a front-rear-back-height in accordance with the inclination of the feed chain.
[0012]
According to claim 3, two side plates formed by drilling a plurality of fin insertion holes in a disk-shaped plate on substantially the same circumference, and one or more side plates having the same shape as the side plates and arranged in parallel A cross flow fan comprising a reinforcing plate and blade-like fins inserted into the side plate and the fin insertion holes of the reinforcing plate is employed.
[0013]
According to claim 4, in the threshing apparatus according to claim 3, the fin insertion hole of the cross flow fan is inserted so that the edge on the side opposite to the rotational direction of the fan and on the outer peripheral side conforms to the shape of the fin. The fin has such a size as to be movable in the fin insertion hole.
[0014]
According to a fifth aspect, in the threshing apparatus according to the third or fourth aspect, the length of the fin of the cross flow fan is longer than a distance between the side plates, and a notch is formed in the fin so that the side plate and the reinforcing plate can be sandwiched. Is what you do.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the invention will be described.
1 is an overall side view of a combine equipped with a threshing apparatus according to the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a partial cross-sectional side view of the combine threshing apparatus, and FIG. 4 is a rear sectional view of the combine threshing apparatus. FIG. 5 is a side view of the threshing apparatus, and FIG. 6 is a side view of the threshing apparatus showing another embodiment of the arrangement of the blower fans.
7 is a view seen from a direction perpendicular to the rotation axis of the cross flow fan, FIG. 8 is a sectional view of the cross flow fan in the rotation axis direction, FIG. 9 is a perspective view of the cross flow fan, and FIG. It is a figure which shows another Example of the crossing type fan which changed. FIG. 11 is a perspective view showing a fin, and FIG. 12 is a view showing a process of assembling the fin. FIG. 13 is a diagram showing another embodiment of the cross flow fan having a changed fan diameter, and FIG. 14 is a perspective view showing another embodiment of the cross flow fan having a changed fan diameter.
[0016]
In the present embodiment, the cross flow fan according to the present invention is employed in a combine. However, the application of the cross flow fan according to the present invention is not limited to this, and can be widely applied to the cross flow fan.
[0017]
First, the configuration of the combine according to the present embodiment will be described with reference to FIGS.
A body frame 2 is mounted on the crawler-type traveling device 1, and a raising / cutting unit 3 is provided at the front end of the body frame 2 so as to be able to move up and down. The raising and cutting section 3 protrudes the weeding plate 4 at the front end to divide the culm, and raises a case 5 at the rear thereof to raise the cereal by rotating a tine 6 protruding from the raising case 5. The culm is raised, and the root of the plant is cut off by the cutting blade 7 arranged at the rear of the weeding board 4.
[0018]
The cut culm is transported to the rear by an upper transport device, a lower transport device, and a vertical transport device 8, and the stock is passed from the upper end of the vertical transport device 8 to the feed chain 9, and the grain is fed into the threshing device 55. The culm is transported. The threshing device 55 is composed of the threshing unit 12 and the sorting unit 17, and sorts the grains from the grains and straw chips (hereinafter, referred to as “processed material”) flowing down from the threshing unit 12 and transports the grains to the Glen tank 13. Like that.
A straw chain 18 is disposed at the rear end of the feed chain 9, and a straw processing unit 19 including a straw cutter device 52 and a diffusion conveyor is formed below the rear of the straw chain 18. After being cut into straw pieces, they are uniformly released into the field while spreading.
[0019]
On the side of the threshing unit 12, a Glen tank 13 for storing the refined granules after sorting is provided, and in front of the Glen tank 13, an operator's cab 14 is provided. Fifteen vertical augers 15a are erected, and the Glen tank 13 is rotatable sideways around the vertical augers 15a.
A discharge conveyor 16 is disposed at the bottom of the Glen tank 13 in the front-rear direction, and power is transmitted from the discharge conveyor 16 to the discharge auger 15, and the grain in the Glen tank 13 is transferred from the tip of the discharge auger 15 to a truck or the like. The grains are discharged.
[0020]
Next, the threshing unit 12 of the threshing device 55 will be described with reference to FIG.
In the threshing unit 12, a handling cylinder 21 is laid in the handling room 28 in the front-rear direction, and teeth 21a are planted around the handling cylinder 21 to perform threshing. A handling cylinder receiving net 20 is provided around the lower portion 21 so that only the processed material leaks.
At the rear of the handling cylinder 21, on the side of the Glen tank 13, the processing cylinder 22 is laid back and forth in parallel with the handling cylinder 21, and the rear of the handling cylinder 21 is connected to the processing An unprocessed material such as spike sticking particles which cannot be processed by the handling cylinder 21 is sent to the processing cylinder 22.
A processing drum receiving net 24 is also provided around the lower part of the processing drum 22, so that only the processing object falls from the processing drum receiving net 24, and a large straw is provided from the rear end of the processing drum receiving net 24. Debris and the like fall onto the diffusion conveyor via a straw debris discharge mechanism (not shown) and are discharged outside the machine.
[0021]
The handling cylinder 21 has a handling tooth 21a fixed to the drum, and is used to feed the grain stem cut by the cutting unit 3 located in front of the threshing device 55 into the handling chamber 28 by the feed chain 9. In this case, the grain stalk that is going to stagnate at the grain stalk entrance portion side of the handling room 28 easily enters the handling room 28 in the retracted position with the ear tip delayed, so that the tip comes into contact with the tooth handling and is rapidly threshed. At this time, since it is strongly rubbed, there were problems such as the occurrence of ear breaks and cut waste.
[0022]
Therefore, as shown in FIGS. 4 and 5, in the handling chamber 28, an ear-cutting direction guide plate 84 and a sticking grain removing body 70 are provided at the lower end of the handling chamber cover 28a in order to reduce the loss of sticking grains. Have been.
[0023]
The lower end of the handle room cover 25a is opened substantially in the front-rear direction to form a handle 28b, and the grain culm conveyed by the feed chain 9 is threshed by the handle drum 21 while passing through the handle 28b. A cutting edge 83 is fixed to the lower part of the handling chamber cover 28a and on the side of the handling cylinder 21 to cut off the straw chips entangled with the teeth 21a of the handling cylinder 21 to reduce unhandled residues. ing. On the handling cylinder 21 side of the handling chamber cover 28a, a spike cutting direction guide plate 84 having a shape along the outer circumference of the handling cylinder 12 is provided, and the grain culm is guided so that straw chips and the like are smoothly processed. You. Further, at the lower end of the handling room cover 28a and at the rear of the handling opening 28b, a stinging particle removing body 70 is provided. The stab particle removing body 70 is a brush-like body, and the rear end thereof reaches a partition plate 50 provided at the rear of the handling chamber 28.
[0024]
The grain hulls conveyed to the threshing unit 12 by the feed chain 9 at the time of threshing are threshed by the handling cylinder 21 in the handling chamber 28, and then the threshed straw is transported to the rear of the machine by the straw chain 18 and discharged. Is done. When threshing, spikelets whose toes have been torn off or stinging grains whose grains are stuck in straw are generated, but the cutting ears circulate in the handling chamber 28 and are again threshed to be simplified, and the stinging grains are handled. Simplified at the rear of the torso 21. In this case, the cut ear grains circulating in the handling chamber 28 move downward from above the ear cutting direction guide plate 84, are guided to the handling cylinder 21 side, and are brought into a state where they are easily rethreshed. In addition, when the cereal stalk is guided to the rear part of the handling cylinder 20, the stinged grains that have entered the cereal stem are washed off by the stab grain prevention body 70 and are easily re-threshed. Is discharged.
[0025]
However, as the amount of straw conveyed by the feed chain 9 increases, it is difficult to cope with only the ear-cutting direction guide plate 84 and the stinging grain prevention plate 70, and the grain of the grain by the ear-cutting grain or the stinging grain is difficult. There is a problem that the loss increases. Therefore, in the threshing unit 12 according to the present invention, in the handling chamber 28, a blower fan 71 for blowing the grain to be threshed by the handling cylinder 21 is provided above the feed chain 9 so as to straighten the grain culm, and By forming the flow of the air flowing along the cutting direction guide plate 84 and the stinging particle prevention body 70, the effect of the ear cutting direction guide plate 84 and the stinging particle prevention body 70 is enhanced.
[0026]
The blower fan 71 is disposed in the vicinity of the feed chain 9 and inside the handling room cover 28a, that is, in the handling room 28 and above the feed chain 9 with some separation from the feed chain 9. The longitudinal direction of the fuselage is the axial direction of rotation, and the axial length is substantially the same as that of the handling cylinder 21 disposed adjacently. Therefore, the axial length of the blower fan 71 is twice as large as the fan diameter in terms of structure, and therefore, a cross flow fan is employed. The detailed structure of the blower fan 71 will be described later.
Further, the blower fan 71 is driven by a series of driving systems for driving the threshing device, like the handling cylinder 21, and rotates with the rotation of the handling cylinder 21. Therefore, it is not necessary to provide a special power source or device for the blower fan 71, and the blower fan 71 can be provided in the threshing unit 12 at low cost.
[0027]
The blower fan 71 blows air sucked from inside or outside of the handling room 28 toward the base of the cereal stem being conveyed by the feed chain 9, and the resulting wind flows from the base to the head of the cereal stem. It will be. That is, by the blowing of the blowing fan 71, an air curtain 72 having a gas flow from the cultivar of the cereal stem toward the head is formed between the handling drum 21 and the feed chain 9, and the cereal culm is formed by the air curtain 72. A rectification function is made to work. Therefore, the cereal stem bent by the passage of the teeth 21a is straightened by the air curtain 72 and straightened.
In this way, the bending of the cereal stem caused by the teeth 21a, 21a,... Immediately after threshing is quickly corrected by the air curtain 72, and the grain culm is rectified when the teeth 21a, 21a,. Can cut the ears of the bent cereal stem, and the next toothing 21a, 21a... Can accurately suppress the occurrence of a large amount of straw waste, The threshing of the culm by each of the teeth 21a, 21a,... Can be performed without leaving unhandled.
[0028]
Further, the blower fan 71 blows air sucked from inside or outside of the handling chamber 28 onto the root side of the grain stalk being conveyed by the feed chain 9, and at the same time, the cutting direction guide plate and the stinging grain prevention body 70. Is sprayed on. Accordingly, a flow of wind that blows down from the upper side to the lower side along the inside of the handling chamber 28 of the spike cutting direction guide plate 84 and the stinging particle prevention body 70 is formed. Accordingly, the movement of the cut ear grains moving from above to below along the cut ear direction guide plate 84 is promoted, and the effect of the stinging grain prevention body 70 for removing the stinging grains that have entered the grain stem is enhanced. You. Further, it is possible to suppress the movement of the grain that tries to fly out of the handling port 28b and return the grain into the handling chamber 28.
[0029]
The blower fan 71 shown in FIG. 3 has its rotation axis 73 substantially horizontal. However, as shown in FIG. 6, the rotation shaft direction of the blower fan 71 is adjusted to the inclination of the feed chain 9 so as to move forward (straw supply side). On the other hand, the rear side (the straw end side) can be made higher. At this time, if the inclination angle of the feed chain 9 is β and the inclination angle of the rotating shaft 73 of the blower fan 71 is α, the magnitude of α is between zero and β (0 ≦ α ≦ β).
As described above, by arranging the rotation shaft 73 of the blower fan 71 at an angle in accordance with the inclination of the feed chain 9, the distance from the grain stalk conveyed by the feed chain 9 to the blower fan 71 is substantially constant. It is possible to make the blowing amount or blowing intensity to the grain culm, the ear breaking direction guide plate 84 and the stinging particle prevention plate 70 substantially constant, and it is possible to efficiently use the blowing from the blowing fan 71. In addition, since the functions of the cutting direction guide plate 84 and the sticking grain prevention plate 70 are not deteriorated, the effect of preventing cutting of ears and sticking grains is expected to increase.
[0030]
Next, the sorting unit 17 of the threshing device 55 will be described with reference to FIG.
In the sorting section 17, specific gravity sorting by the rocking sorting device 49 and wind sorting by Karino 26 are performed, and sorted into the first thing, the second thing, straw waste and the like.
The swing sorting device 49 is housed in the machine frame 35, and the front of the swing sorting device 49 is positioned below the front end of the handling cylinder 21, and the rear of the swing sorting device 49 is located at the rear end of the dust port processing cylinder 22. It extends to below the part. A swinging shaft is provided at the lower front part of the swinging sorting device 49, and a swinging drive mechanism 34 is provided at the rear portion. The swinging sorting device which is swingably supported by the machine frame by the swinging drive mechanism 34. 49 swings.
[0031]
In the machine frame 35, a Karino case 60 is formed below the front part of the swinging sorting device 49, and recesses 97a and 97b are provided behind the Karamin case 60. A second conveyor 37 is provided inside.
[0032]
In the front part of the rocking sorter 49, a feed pan 30 formed by shaping a plate into a wavy shape so as to easily transport grains backward is provided. A front portion of a certain chaff sheave 33 is provided, and a rear feed pan 31 is formed below the chaff sheave 33. At the rear of the rear feed pan 31, a mesh-shaped grain sheave 32 as a second sorting part is continuously provided, and a straw rack 29 is arranged behind the grain sheave 32.
[0033]
In addition, the first conveyor 36 and the second conveyor 37 are provided horizontally in the front-rear halfway position below the swinging sorting device 49, and the grain conveyor 38 is connected to the right side of the first conveyor 36 among them. The first thing that has leaked onto the flocking plate 39 of the first conveyor 36 via the rocking sorter 49 is transferred from the first conveyor 36 through the fry conveyor 38 to the Glen tank 13. To be transported.
A second reduction conveyor 40 is connected to the right end of the second conveyor 37, and a front end of the second reduction conveyor 40 is connected to the second processing apparatus 10, and the second processing apparatus 10 The second product from which the branch stalks have been removed by the branch stalk processing cylinder 11 is re-introduced into the sorting start portion of the rocking sorting device 49.
[0034]
Below the rear part of the feed pan 30, a Karamin 26 is arranged to send a sorting wind to the Glen Sheave 32 and the chaff Sheave 33, and a second fan as a sub-pressure feeding fan is also provided between the first conveyor 36 and the second conveyor 37. A sorting wind is blown by providing 46, so that the sorting performance does not decrease even in the rear part of the sorting unit 17 where the wind force of the sorting wind by the Karino 26 is weakened.
[0035]
Further, above the rear end of the swinging sorting device 49, a suction fan 25 is provided horizontally across the entire width, and the suction fan 25 rides on the flow of the sorting wind supplied from the Karino 26 and the second fan 46. The collected dust is sucked and discharged outside the machine.
[0036]
Next, the structures of the suction fan 25 and the blower fan 71 will be described.
The suction fan 25 and the blower fan 71 are both cross-flow fans, and have substantially the same configuration. Therefore, the structure of the suction fan 25 and the blower fan 71 which are the cross flow fans employed in the threshing unit 12 according to the present embodiment will be described using the cross flow fan 80 shown in FIGS. The structure of the cross flow fan 80 is not limited to the suction fan 25 and the blower fan 71 according to the present embodiment, but can be widely applied to other cross flow fans.
[0037]
As shown in FIGS. 7 to 9, the cross flow fan 80 according to the present embodiment includes a rotating shaft 81, a boss 74 externally fitted to the rotating shaft 81, side plates 75, 75 and a reinforcing plate externally fitted to the boss 74. 76, a plurality of fins 77 inserted through the side plates 75, and the reinforcing plate 76.
[0038]
The side plates 75, 75 and the reinforcing plate 76 have the same shape, and the components are shared to improve the assemblability and reduce the cost by reducing the number of components. In the cross flow fan 80 of this embodiment, the reinforcing plate 76 is a single sheet. However, as shown in FIG. 10, it is preferable to increase the rigidity by appropriately increasing the reinforcing plate 76 depending on the axial length of the fan 80. . That is, the same member can be shared with the fans 80 having the same fan diameter regardless of the axial length of the fan 80, so that the versatility of the members is increased and the cost can be reduced. .
[0039]
The side plates 75, 75 and the reinforcing plate 76 are provided with a hole 78 for inserting a cylindrical body serving as a boss 74 at the center of rotation, and a plurality of fin insertion holes 79, 79,. Has been drilled. Are arranged side by side on substantially the same circumference, and have a shape of a ship bottom, and are opposite to the rotation direction of the fin insertion holes 79. On the outer peripheral side, curved portions 79a, 79a,... Conforming to the shapes of the fins 77, 77,.
[0040]
On the other hand, as shown in FIG. 11, the fin 77 is a blade-shaped curved plate longer than the space between the two side plates 75, and an upright portion 77 a is formed on a side portion which is an outer peripheral side when the fan 80 is configured. Is formed. At the end portions of the upright portions 77a, cutouts 77b for holding the outer peripheral portions of the fin insertion holes 79 of the side plates 75 and the reinforcing plate 76 are formed.
One or more reinforcing plates 76 are interposed between the side plates 75, 75, and fins 77, 77, between the side plates 75 and the reinforcing plate 76 or between the reinforcing plates 76. Are not divided, and fins 77, 77... Which are continuously and integrally formed in the axial length of the fan 80 are employed. Therefore, the number of components of the fan 80 can be reduced, and assemblability is improved.
[0041]
When assembling the fan 80, first, the boss 74 is inserted through the side plates 75 and the reinforcing plate 76. Then, as shown in FIG. 12, the fins 77 are inserted through the fin insertion holes 79 of the side plate 75 and the reinforcing plate 76. The fin insertion holes 79 are larger than the cross-sectional shape of the fins 77, and the fins 77 inserted in the fin insertion holes 79 radiate radiation. It is large enough to move in the direction.
[0042]
The fins 77 that are inserted into the fin insertion holes 79 are moved toward the outer peripheral sides of the side plates 75 and the reinforcing plate 76 to form the fins 77. Are engaged with the ends of the fin insertion holes 79, 79, and so on so that the periphery thereof is clamped, and are formed in the fin insertion holes 79, 79,. Move the curved portions 79a, 79a... And the fins 77, 77... To correspond to each other, and fix the curved portions 79a, 79a. I do.
In this way, the fins 77 are sequentially inserted through the side plates 75, 75 and the reinforcing plate 76 to form the fan 80, and the fins 77, 77, and the boss 74 are fixed by welding. The fan 80 is completed.
[0043]
When the fan 80 rotates about the rotation shaft 81, centrifugal force acts on the fins 77, 77..., So that the fins 77, 77. Since the fin insertion holes 79 formed in the reinforcing plate 76 are fixed to the outer peripheral side of the fin insertion holes 79 formed in the same shape as the fins, that is, the curved portions 79a 79a. , The side plates 75, 75 and the reinforcing plate 76 receive a force against the centrifugal force applied to the fins 77, 77.
The fins 77 are fixed to the side plates 75 and the reinforcing plate 76 by welding. However, the force applied to the welds can be reduced, and the deformation and breakage of the fan 80 can be reduced more effectively. It is possible to reduce the welding length.
In addition, there are no additional components such as bolts, and the structure is simpler and the number of parts is smaller than conventional ones, so that the fan can be made lightweight while maintaining appropriate rigidity, and It can be started without burden.
[0044]
With the fan 80 configured as described above, the positioning of the fins 77, 77,..., The side plates 75, 75 and the reinforcing plate 76 is easy, and the notches 77b, 77b formed in the fins 77, 77,. , And the fins 77, 77 and the side plates 75, 75 and the reinforcing plate 76 can be fixed slightly and then welded, so that assembly is simple.
It should be noted that the fan 80 can be assembled in the same manner even when a curved plate provided with claw-shaped projections 77c (FIG. 8) on the outer peripheral side when the fan 80 is configured is adopted as the fins 77. That is, when the fins 77 are provided with or without projections, they can be assembled in the same process using the same side plates 75 and 75 and the reinforcing plate 76. Therefore, the versatility of parts is increased, and the assembly process is unified, contributing to cost reduction.
[0045]
If the axial lengths of the fans 80 are equal, the fins 77 can be shared regardless of the diameter of the fan 80. That is, when a fan 80 (small diameter fan 80S) having a small fan diameter as shown in FIGS. 13 and 14 is configured for the fan 80 (large diameter fan 80L) as shown in FIG. If the large-diameter fan 80L and the small-diameter fan 80S have the same axial length, the fins 77 can have the same shape.
More specifically, since the diameter of the side plates 75 and 75 and the reinforcing plate 76 of the small-diameter fan 80S is smaller than that of the large-diameter fan 80L, the fin insertion holes 79 and Are substantially the same shape as the fin insertion holes 79 of the large-diameter fan 80L, and the number is reduced. Since the shapes of the fin insertion holes 79 are the same as those of the large-diameter fan 80L and the small-diameter fan 80S, the fins 77 having substantially the same cross-sectional shape can be used.
Therefore, the same member can be shared by the fans 80 having different axial lengths, and the versatility of the member is increased, and the cost can be reduced.
[0046]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0047]
That is, in a threshing apparatus for providing threshing in a handling chamber covered with a handling cylinder cover at an upper portion and threshing while transporting grain stalks in the handling chamber by a feed chain, the feeding chamber is provided with Above the chain and on the side of the handling cylinder, a fan that can blow over a width approximately equal to the axial length of the handling cylinder is provided, and the fan is blown toward the root of the grain culm, so that the grain culm is rectified and further cut off the ear The effects of the direction guide plate and the stinging particle preventive body can be increased, and the cut ears and stinging particles can be reduced.
[0048]
According to a second aspect of the present invention, in the threshing apparatus according to the first aspect, the fan is a cross-flow fan, and a rotation axis direction thereof is disposed at the front and rear heights according to the inclination of the feed chain. The distance between the culms becomes substantially constant, and it is possible to blow air uniformly to the grain culms to be transported.
[0049]
As shown in claim 3, two side plates formed by piercing a plurality of fin insertion holes in a disk-shaped plate on substantially the same circumference, and one or more side plates having the same shape and arranged in parallel with the side plates The cross-flow fan composed of the reinforcing plate and the blade-shaped fins inserted into the side plate and the fin insertion holes of the reinforcing plate is adopted. It becomes. Further, the versatility of the parts is increased, and the cost can be reduced. Further, since the load applied to the fin when the fan rotates can be received by the blade insertion hole, the load applied to the fin and the reinforcing portion of the side plate or the reinforcing plate can be reduced.
[0050]
As shown in claim 4, in the threshing apparatus according to claim 3, the fin insertion hole of the cross flow fan is inserted so that the edge on the side opposite to the rotation direction of the fan and on the outer peripheral side conforms to the shape of the fin. Since the fins are large enough to be movable in the fin insertion holes, the fins can be inserted into the fin insertion holes for positioning, and the positioning of the fins, the side plates, and the reinforcing plate is simplified.
[0051]
As shown in claim 5, in the threshing apparatus according to claim 3 or 4, the length of the fin of the cross flow fan is longer than the distance between the side plates, and the notch capable of sandwiching the side plate and the reinforcing plate is formed in the fin. Since it is formed, the positioning of the fin, the side plate, and the reinforcing plate becomes simple and accurate.
[Brief description of the drawings]
FIG. 1 is an overall side view of a combine equipped with a threshing apparatus according to the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a partial side sectional view of a combine threshing apparatus.
FIG. 4 is a rear sectional view of the combine threshing apparatus.
FIG. 5 is a side view of the threshing apparatus.
FIG. 6 is a side view of a threshing apparatus showing another embodiment of the arrangement of the blower fans.
FIG. 7 is a diagram viewed from a direction orthogonal to a rotation axis of the cross flow fan.
FIG. 8 is a cross-sectional view of a cross flow fan in a rotation axis direction.
FIG. 9 is a perspective view of a cross flow fan.
FIG. 10 is a view showing another embodiment of a transverse fan having a changed axial length.
FIG. 11 is a perspective view showing a fin.
FIG. 12 is a diagram showing a process of assembling the fins.
FIG. 13 is a view showing another embodiment of the cross flow fan in which the fan diameter is changed.
FIG. 14 is a perspective view showing another embodiment of the cross flow fan in which the fan diameter is changed.
[Explanation of symbols]
9 Feed chain
12 Threshing section
17 Sorting Department
21 Handling cylinder
28 Handling Room
28a Handling room cover
55 threshing equipment
71 Blow fan
72 air curtain
73 Rotation axis
75 Side plate
76 Reinforcement plate
77 Fins
79 Fin insertion hole
80 cross flow fan

Claims (5)

In a threshing device that has a handle in a handle room covered with a handle cover on the upper side and threshing while transporting grain stalks in the handle room by a feed chain,
Threshing, characterized in that a fan capable of blowing air over a width substantially equal to the axial length of the handling cylinder is provided in the handling room above the feed chain and on the side of the handling cylinder, and the fan is blown toward the base of the grain culm. apparatus. The threshing device according to claim 1,
A threshing apparatus characterized in that the fan is a cross-flow fan, and the direction of the axis of rotation of the fan is arranged at the front low and the rear high according to the inclination of the feed chain. Two side plates formed by drilling a plurality of fin insertion holes on a substantially same circumference on a disc-shaped plate, one or more reinforcing plates having the same shape and arranged in parallel with the side plates, and a side plate and A threshing apparatus characterized by employing a cross flow fan composed of blade-shaped fins inserted into fin insertion holes of a reinforcing plate. In the threshing apparatus according to claim 3,
The fin insertion hole of the cross flow fan has an edge on the side opposite to the rotation direction of the fan and on the outer peripheral side adapted to the shape of the fin, and has such a size that the inserted fin can move in the fin insertion hole. Characteristic threshing equipment. In the threshing device according to claim 3 or claim 4,
A threshing apparatus, wherein the fin of the cross flow fan is longer than the space between the side plates, and a notch is formed in the fin so that the side plate and the reinforcing plate can be sandwiched.

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