JP2003245008A - Structure of sieve case of thresher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and effectively suppress shaking of a group of chaff lip plates caused by selective shaking of a sieve case. <P>SOLUTION: In the structure of a sieve case 8 of a thresher, a chaff sieve 17 is constituted to bring its opening to be adjustable by connecting a group of chaff lip plates 17A of the chaff sieve 17 installed to the sieve case 8 for sieving and separating a material to be treated around shaking fulcrums P set sideways in the rear of each of upper ends, and an opening-adjusting spring 24 forcing to pull up the group of chaff lip plates 17A is installed so that the opening is automatically regulated depending on a weight of the material to be treated on the chaff sieve 17. A damper 26 is installed for suppressing vibration of the group of the chaff lip plates 17A caused by selective shaking of the sieve case 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a group of chaff sheaves of chaff sheaves, which are mounted on a sheave case for sieving and sorting processed products, interlockingly swinging around lateral swinging fulcrums set at the upper ends of their rear portions. The chaf sheaves are operably connected to each other so that the opening degree can be adjusted, and the chaf flip plate group is urged to be pulled up to the closing side so that the opening degree is automatically adjusted according to the weight of the processed material on the chaf sheaves. The present invention relates to a sheave case structure of a threshing device provided with an opening adjustment spring.

[0002]

2. Description of the Related Art Conventionally, in a sheave case structure of a threshing device as described above, for example, Japanese Unexamined Patent Publication No. 2001-24552.
As disclosed in Japanese Patent No. 5, the counterweight suppresses the vibration of the chaflip plate group due to the selective swing of the sheave case.

[0003]

According to the above-mentioned conventional technique, the weight of the counter weight is set in consideration of the weight of the chaflip plate group which changes according to the size of the chaff sheave mounted on the sheave case. In some cases, depending on the relationship between the extending direction of the counterweight and the swinging direction of the sheave case, the counterweight itself may vibrate with the sorting swing of the sheave case, causing the malfunction of opening and closing the chaff sheave. Therefore, various settings have been required for suppressing the vibration of the Chaflip plate group.

An object of the present invention is to easily and effectively suppress the vibration of the chaflip plate group due to the selective swing of the sheave case.

[0005]

[Means for Solving the Problems] [Structure] In order to achieve the above object, in the invention according to claim 1 of the present invention,
Adjusting the opening of the chaff sheave by connecting chaf sheave plate groups of chaff sheaves installed in the sheave case for sieving and sorting the processed objects so that they can swing together around the lateral swing fulcrums set at the upper ends of their rear portions. Of a threshing device that is configured to be possible and that is provided with an opening adjustment spring that pulls up and urges the chaflip plate group to the closing side so that the opening is automatically adjusted according to the weight of the processed material on the chaff sheave In the sheave case structure, a damper that suppresses the vibration of the chaflip plate group due to the selective swing of the sheave case is provided.

[Operation] According to the first aspect of the present invention, the damper dissipates the swing operation force of the chaflip plate group caused by the sorting swing of the sheave case, whereby the sieve case is sorted. It is possible to suppress the vibration of the chaflip plate group due to the swing.

Since the swinging operation force by the damper can be effectively dissipated regardless of the weight of the chaflip plate group and the swinging direction of the sheave case, the chaflip plate is provided as when a counterweight is provided. It is not necessary to consider the weight of the group and the swing direction of the sheave case, and
In the case where a counterweight is provided, if the structure is expanded to a large sheave case,
The larger sheave case is, the larger the weight of the sheave case becomes. However, in the invention described in claim 1, the use of the damper instead of the counter weight does not cause such an inconvenience.

[Effects] Therefore, it is possible to easily and effectively suppress the vibration of the chaflip plate group due to the selection swing of the sheave case, and to improve the selection performance of the chaff sheave, as well as the entire sheave case. It has become possible to reduce the weight.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, an oil damper is adopted as the damper.

[Operation] According to the invention described in claim 2, since the viscous resistance of the oil is proportional to the rocking speed of the chaflip plate group, the viscous resistance of the oil is comparatively caused by the selection rocking of the sheave case. The vibration of the fast-changing chaflip plate group is suppressed, and the swing of the relatively slow-speed chaflip plate group is allowed due to the weight of the processed object.

[Effect] Therefore, it is possible to effectively suppress the vibration of the chaflip plate group due to the selective swing of the sheave case without impairing the responsiveness when adjusting the opening degree of the chaff sheave by the weight of the processed object. This makes it possible to effectively improve the sorting performance of chaff sheaves.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a longitudinal side surface of a threshing device mounted on a combine, and this threshing device is
A threshing section 2 that performs threshing processing on the tip side of a harvested culm that is laterally held and conveyed by a feed chain 1 arranged on the left side thereof, and a sorting processing that performs sorting processing on a processed product from the threshing section 2. Part 3, and a recovery part 4 for recovering the first and second products of the processed products selected by the selection part 3,
Etc.

The threshing unit 2 is a handling cylinder 5 which is driven to rotate about a longitudinal axis, and a receiving net 6 arranged below the handling cylinder 5.
Also, the grain is separated from the cut grain culm, which is constituted by the dust inlet 7 formed at the rear of the receiving net 6 and the like, and the handling cylinder 5 is carried by the feed chain 1 into single grains, and the single grains are formed. The converted grains and broken straws are allowed to leak from the receiving net 6 toward the sorting unit 3, and the grains and broken straws that have not leaked from the receiving net 6 are discharged from the dust outlet 7 to the sorting unit 3. It is like this.

The sorting section 3 is composed of a sheave case 8 arranged below the receiving net 6, and a sardine leech 9 arranged below the front of the sheave case 8, and the like.
Is oscillated and driven by the operation of an eccentric drive mechanism 10 arranged at the rear part of the threshing unit 2 to perform sifting and selection, and the Karato 9 toward the sheave case 8. By supplying the sorting wind, wind sorting is added to the processed material that is sieved and sorted by the sieve case 8. Then, by these sorting operations, the processed product from the threshing unit 2 is a mixture of the first grain, the second grain, and the cut straw,
It is designed to be cut into pieces such as cut straws as the third item.

The recovery part 4 is composed of a first object recovery part 11 formed below the front part of the sheave case 8 and a second object recovery part 12 formed below the rear part of the sheave case 8. There is. The No. 1 object collecting unit 11 collects No. 1 of the processed products sorted by the selecting unit 3, and the No. 1 screw collected at the bottom of the No. 1 screw is horizontally disposed. It is configured to be conveyed by an unillustrated lifting screw, which is connected to the right end of the communicator 13 and is not shown. The No. 2 screw collecting unit 12 collects No. 2 of the processed products sorted by the sorting unit 3, and the No. 2 screw collected at the bottom of the No. 2 screw is horizontally disposed. It is configured to be conveyed by the No. 2 reduction screw 15 which is connected to the right end of the No. 2 reduction screw 15.

The pumping screw is the first screw 1
The No. 1 product conveyed at 3 is lifted and supplied to a grain tank (not shown) arranged in parallel on the right side of the threshing device. The second reduction screw 15 is the second screw 1
The No. 2 object conveyed at 4 is pumped and returned to the sheave case 8.

As shown in FIGS. 1 and 2, the sheave case 8 includes a first Glen Pan 16 and a first Glen Pan 16 disposed on the upper portion thereof.
The chaff sheave (chaff sheave according to the claims) 17, the second chaff sheave 18, the straw rack 19, and the like perform a rough sorting process on the processed products from the threshing unit 2 and the second reduction screw 15 and deploy them underneath. The second Glen pan 20 and the Glen sieve 21
The processing material leaked from the chaff sheave 18 is configured to be subjected to a precise selection processing.

As shown in FIGS. 2 to 5, the first chaff sheave 17 includes a group of cha-flip plates 17A arranged side by side at a predetermined interval in the front-rear direction and oscillating in the left-right direction set at the upper ends of their rear portions. The first connecting member 22 is pivotally connected to the left and right side walls 8A of the sheave case 8 so that the lower end of the sheave case 8 is interlocked with the second connecting member 23. The opening degree can be adjusted by connecting them. In addition, the first chaff sheave 17 is provided with a tension spring 24 for pulling up and biasing the chaf flip plate 17A group toward the closing side.
Due to the increase in the amount of processed material accumulated on the first chaff sheave 17 and the wet crop of the harvested crop,
As the weight of the object to be processed acting on the chaff sheave 17 becomes heavier, the weight of the chaf flip plate 17A group causes the chaf flip plate 17A to swing downward toward the opening side against the biasing force of the tension spring 24. The opening can be increased in a state of being substantially proportional to the weight of the processed material on the first chaff sheave 17, and conversely, the amount of the processed material accumulated on the first chaf sheave 17 decreases and the crop to be harvested tends to be dry. As a result, as the weight of the object to be processed that acts on the first chaff sheave 17 becomes lighter, the chaf flip plate 17A group rises and swings toward the closing side due to the biasing force of the tension spring 24. Therefore, the opening degree of the first chaff sheave 17 is increased. The first
The size can be reduced in a state of being substantially proportional to the weight of the processed material on the chaff sheave 17.

That is, the tension spring 24 is an opening adjustment spring for forming the first chaff sheave 17 in a weight sensing type whose opening changes according to the weight of the processing object on the first chaff sheave 17, and is opened. With a simple configuration in which the opening adjustment spring 24 is provided on the first chaff sheave 17 with adjustable degree,
When it becomes difficult for the treated material to leak from the first chaff sheave 17 due to an increase in the amount of the treated material accumulated on the first chaff sheave 17 and the treated material becoming wet, the treated matter weight With the increase, the opening degree of the first chaff sheave 17 can be increased, and from the first chaff sheave 17 of the grain having a high specific gravity in the processed material to the second fine sorting section.
Leakage toward the Glen pan 20 and the Glen sieve 21 can be promoted, and conversely, because the amount of the processed material deposited on the first chaff sheave 17 decreases and the processed material becomes dry, the first When the treated product easily leaks from the chaff sheave 17, the opening amount of the first chaff sheave 17 can be reduced due to the reduction in the treated product weight accompanied by the decrease in the weight of the treated product. From the first chaff sheave 17 to the second Glenpan 20 which is the precise selection unit
It is possible to suppress the leakage toward the grain sheave 21 and the grain sheave 21, and as a result, it is possible to improve the sorting efficiency and the sorting accuracy while simplifying the configuration and reducing the manufacturing cost.

Moreover, by directly adjusting the opening degree of the first chaff sheave 17 by the weight of the processed material on the first chaff sheave 17, the opening degree of the first chaff sheave 17 is adjusted on the first chaff sheave 17 at that time. The first chaff sheave 17 can be agitated depending on the condition of the processed material.
The error between the actual opening and the optimum opening of the first chaff sheave 17 according to the state of the processed material on the first chaff sheave 17 can be made extremely small.

In the second connecting member 23, the pin 23A connected to the left side of the free end of the predetermined chaf flip plate 17A has a left end portion extending from the second connecting member 23 toward the left outer side. The one of the length is adopted. On the other hand, the left side wall 8A of the sheave case 8 is formed with an elongated hole 8a that allows the pin 23A to move in accordance with the opening / closing operation of the first chaff sheave 17. The long hole 8a is formed in an arc shape around the swing fulcrum P of the chaflip plate 17A to which the long pin 23A is mounted, and the first chaff sheave 17 is in contact with the upper end of the pin 23A. Of the first chaff sheave 17 becomes the maximum limit opening (fully open state) when the pin 23A contacts the lower end thereof. , First chaff sheave 1
The movement of the pin 23A associated with the opening / closing operation of the pin 7 is restricted.

An operating lever 25 for setting and changing the minimum opening and maximum opening of the first chaff sheave 17 and the spring load of the opening adjusting spring 24 is provided on the lateral outside of the left side wall 8A of the sheave case 8. This operation lever 2
5 is configured to be elastically deformable in the left-right direction.

A support shaft 8b for swingably supporting the operating lever 25 is provided at a rear portion of the elongated hole 8a in the left side wall 8A of the sheave case 8 so as to project. The operation lever 25 has a swing fulcrum portion for changing the position of the operation lever 25 in the front-rear direction with respect to a predetermined chaf flip plate 17A in a state where the minimum opening degree of the first chaff sheave 17 is set to a limit minimum opening degree. A long hole 25a for allowing the hole is formed, and an opening 25b for restricting the movement of the pin 23A associated with the opening / closing operation of the first chaff sheave 17 is provided in the middle portion thereof. 8A first projecting at a predetermined interval
Engagement hole 25 for fixing and holding the operation lever 25 at a desired operation position by engaging with any one of the engagement protrusion a to the fifth engagement protrusion e.
c is formed. A support piece 25d is bent and formed at the upper end of the intermediate portion of the operation lever 25, and an opening adjustment spring 24 is stretched over the support piece 25d and the long pin 23A.

With the above construction, as shown in FIG. 3, when the engaging hole 25c of the operating lever 25 is engaged with the first engaging protrusion a, the minimum opening of the first chaff sheave 17 is set to the limit minimum opening. And the maximum opening is 3 below the limit maximum opening.
The opening angle is set to a small opening degree, and the relative angle between the predetermined Char flip plate 17A and the opening degree adjusting spring 24 at the minimum opening degree is set to the maximum angle that comes closest to a right angle.
Pulling force (closing force) of the first chaff sheave 17 by 4
Is maximized, and the leakage of the processed material from the first chaff sheave 17 is suppressed.

When the engaging hole 25c of the operating lever 25 is engaged with the second engaging protrusion b located right behind the first engaging protrusion a, the minimum opening of the first chaff sheave 17 is maintained at the limit minimum opening. However, the maximum opening degree of the first chaff sheave 17 is set to be one step larger than that when the engaging hole 25c of the operation lever 25 is engaged with the first engaging protrusion a, and
By the sliding displacement of the operation lever 25 rearward, the relative angle between the predetermined Char flip plate 17A and the opening adjustment spring 24 at the minimum opening is reduced, and the first opening by the opening adjustment spring 24 is reduced.
Since the lifting force of the chaff sheave 17 becomes smaller,
As compared with the case where the engagement hole 25c of the operation lever 25 is engaged with the first engagement protrusion a, the leakage of the processed material from the first chaff sheave 17 is promoted.

When the engagement hole 25c of the operating lever 25 is engaged with the third engagement projection c located right behind the second engagement projection b, the minimum opening degree of the first chaff sheave 17 is maintained at the limit minimum opening degree. However, the maximum opening degree of the first chaff sheave 17 is set to be one step larger than that when the engaging hole 25c of the operating lever 25 is engaged with the second engaging protrusion b.
By the sliding displacement of the operation lever 25 rearward, the relative angle between the predetermined Char flip plate 17A and the opening adjustment spring 24 at the minimum opening is reduced, and the first opening by the opening adjustment spring 24 is reduced.
Since the lifting force of the chaff sheave 17 becomes smaller,
As compared with the case where the engagement hole 25c of the operation lever 25 is engaged with the second engagement protrusion b, the leakage of the processed material from the first chaff sheave 17 is promoted.

As shown in FIG. 2, when the engaging hole 25c of the operating lever 25 is engaged with the fourth engaging protrusion d located below the third engaging protrusion c, the minimum opening degree of the first chaff sheave 17 is reached. Is set to an opening that is one step larger than the limit minimum opening, and the maximum opening of the first chaff sheave 17 is larger than when the engaging hole 25c of the operating lever 25 is engaged with the third engaging protrusion c. By setting the limit maximum opening one step larger and swinging the operation lever 25 rearward and downward, the relative angle between the predetermined Char flip plate 17A and the opening adjustment spring 24 at the minimum opening is increased. The smaller the distance between the support piece 25d of the operating lever 25 and the elongated pin 23A becomes, and the pulling force of the first chaff sheave 17 by the opening adjustment spring 24 becomes smaller, so that the engaging hole of the operating lever 25 becomes smaller. 25
The leakage of the processed material from the first chaff sheave 17 is promoted more than when the c is engaged with the third engagement protrusion c.

When the engagement hole 25c of the operating lever 25 is engaged with the fifth engagement protrusion e located below and behind the fourth engagement protrusion d, the maximum opening degree of the first chaff sheave 17 is maintained at the limit maximum opening degree. However, compared with the case where the engagement hole 25c of the operation lever 25 is engaged with the fourth engagement protrusion d, the minimum opening degree of the first chaff sheave 17 is set to an opening degree one step larger, and
When the operation lever 25 is pivotally displaced rearward and downward, a predetermined char flip plate 17A and the opening adjustment spring 24 at the minimum opening are provided.
And the distance between the support piece 25d of the operation lever 25 and the elongated pin 23A becomes smaller,
Since the pulling force of the first chaff sheave 17 by the opening adjustment spring 24 becomes small, the engagement hole 2 of the operation lever 25
The leakage of the processed material from the first chaff sheave 17 is promoted more than when the 5c is engaged with the fourth engagement protrusion d.

That is, by operating the operation lever 25,
The opening adjustment range of the first chaff sheave 17 according to the type and wetness of the crop to be harvested or the harvest amount, or the first
The opening amount per unit weight of the chaff sheave 17 can be set and changed, so that the sorting efficiency and the sorting accuracy of the first chaff sheave 17 can be improved.

2 to 4, the left side wall 8A of the sheave case 8 has a casing 2 as an example of the damper 26.
An oil damper 26 that suppresses the swing of the swing arm 26C due to the swing of the rotary shaft 26B due to the viscosity of the oil filled in the 6A is provided, and the rotary shaft 26B of the oil damper 26 is linked to the link arm. By being linked to the elongated pin 23A via 27, the swing arm 26C is interlocked with the group of char flip plates 17. Incidentally, the swing arm 26C is formed so that its free end side is bent to have an L-shape in a sectional view, which easily receives the viscous resistance of oil. Also, long pin 23
A is inserted into a long hole 27a formed in the linking arm 27 and is allowed to be displaced with respect to the linking arm 27.

With this structure, the rocking operation force of the chaflip plate 17A group caused by the selection rocking of the sheave case 8 can be dissipated by the oil damper 26.
Therefore, it is possible to suppress the vibration of the chaflip plate 17A group due to the selection swing of the sheave case 8.
Further, the viscous resistance of the oil is proportional to the swing speed of the swing arm 26C interlocking with the group of Char flip plates 17A, whereby the fast flip Char flip plate 17A caused by the selective swing of the sheave case 8. The vibration of the group is suppressed, and the chaflip plate 17A is slow due to the weight of the processed material.
Since the swing of the group is allowed, the chaflip plate caused by the selective swing of the sheave case 8 without impairing the responsiveness when adjusting the opening degree of the first chaff sheave 17 by the weight of the processed object. The vibration of the 17A group can be effectively suppressed, and thus the sorting performance of the first chaff sheave 17 can be effectively improved.

Each chaflip plate 17A is made of resin in order to suppress vibration due to weight reduction, and when each chaflip plate 17A is formed in a simple flat plate shape, the weight of the processed material is reduced. Bending is likely to occur, which may lead to deterioration of the selection efficiency and the selection accuracy due to the gap between the chaflip plates 17A becoming inappropriate. Further, if the wall thickness of each chaflip plate 17A is increased to increase the rigidity in order to prevent bending due to the weight of the processed material,
As a result, the weight is increased, and the chaflip plate 17 is required to ensure an appropriate gap between the chaflip plates 17A.
Since the arrangement pitch of A must be widened, there is a disadvantage that the sheave case 8 becomes large.

Therefore, as shown in FIGS. 2 to 6, each chaflip plate 17A is not bent to have a large wall thickness, but is bent to have an S-shaped cross section so as to increase rigidity. Therefore, it is possible to prevent the bending of each chaflip plate 17A due to the weight of the processed material without increasing the weight and increasing the size of the sheave case 8, and the bending causes a gap between the chaflip plates 17A. It is possible to avoid the deterioration of the selection efficiency and the selection accuracy due to the improper selection.

[Other Embodiments] Other embodiments of the present invention will be listed below. (1) The casing 26A may be filled with grease that does not easily leak to facilitate sealing. (2) As the damper 26, an air damper or a friction damper may be adopted.

[Brief description of drawings]

1 is a vertical side view of the threshing device.

FIG. 2 is a side view of a main part of the sheave case.

FIG. 3 is an exploded view of a main part showing the association between a chaflip plate group and a damper.

FIG. 4 is a cross-sectional plan view of a main part showing the association between a chaflip plate group and a damper.

FIG. 5 is a vertical sectional front view of a main part of the sheave case.

FIG. 6 is a perspective view showing the shape of a cha flip board.

[Explanation of symbols]

8 sheave cases 17 chaff sheaves 17A Char flip board 24 Opening adjustment spring 26 Damper (oil damper) P swing fulcrum

Claims (2)

[Claims] 1. A chaf sheave plate group of chaff sheaves, which is equipped in a sheave case for sieving and sorting a processed material, is linked so as to be capable of interlocking swing movement around a lateral swing fulcrum set at an upper end of each rear portion thereof. The chaf sheave is configured so that its opening can be adjusted, and an opening adjustment spring for pulling up and biasing the chaf flip plate group toward the closing side is provided so that the opening can be automatically adjusted according to the weight of the processing object on the chaf sheave. The sheave case structure of the threshing device, wherein the sheave case structure of the threshing device is equipped with a damper that suppresses the vibration of the chaflip plate group due to the selection swing of the sheave case. 2. The sheave case structure of the threshing device according to claim 1, wherein an oil damper is adopted as the damper.