JP6931494B1 - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a combine harvester which prevents a grain culm from being entangled with a rear end portion of a net, suppresses an increase in a threshing load, and has a high work efficiency of the threshing work. SOLUTION: A rotating shaft (30) for supporting a substantially cylindrical handling cylinder (11) for threshing a grain culm is rotatably installed on the front and rear walls of a handling chamber (10), and the handling cylinder (11) is installed. A substantially semi-cylindrical receiving net (12) extending in the front-rear direction along the handling cylinder (11) is provided on the lower side, and the rear end portion of the receiving net (12) is placed behind the handling cylinder (11). The receiving net (12) is positioned on the front side of the end portion, and is provided on the partition plate (60) in the circumferential direction with a substantially semicircular partition plate (60) provided at a predetermined interval in the front-rear direction. The first rear end partition plate (69) and the first rear end partition plate, which are formed by crosspieces (62) extending in the front-rear direction and are located at the rear end of the receiving net (12). An opening (63) was formed at a portion located between the second rear end partition plates (68) adjacent to the front side of (69). [Selection diagram] FIG. 7

Description

The present invention relates to a combine harvester.

Conventionally, a substantially anti-arc-shaped receiving net is provided on the lower side of the handling cylinder for degraining the culm, and the rear end of the receiving net is positioned on the front side of the rear end of the handling cylinder to rear the handling cylinder. A technique has been proposed in which the grain culm transported to the end is efficiently dropped downward.

Japanese Unexamined Patent Publication No. 2019-11804

However, in the technique of Patent Document 1, threshing occurs because a particularly tall grain culm conveyed to the rear end of the handling cylinder is entangled with the rear end of the receiving net and is clogged between the handling cylinder and the receiving net. There is a problem that the load is increased and the work efficiency of the threshing work is lowered because it is necessary to interrupt the threshing work and remove the culm stuck between the handling cylinder and the receiving net.

Therefore, an object of the present invention is to propose a combine harvester that prevents the culm from being entangled with the rear end of the receiving net, suppresses an increase in the threshing load, and has high work efficiency in the threshing work. It is in.

The present invention that solves the above problems is as follows.
That is, the invention according to claim 1 is a combine having a handling chamber (10) for threshing grain culms and a sorting chamber (20) for sorting the threshed grains below the handling chamber (10). In the threshing device
On the front and rear walls of the handling chamber (10), a rotating shaft (30) for supporting a substantially cylindrical handling cylinder (11) for performing a grain removal process is rotatably installed under the handling cylinder (11). A substantially semi-cylindrical receiving net (12) extending in the front-rear direction along the handling cylinder (11) is provided on the side, and the rear end portion of the receiving net (12) is attached to the handling cylinder (11). The receiving net (12) is positioned on the front side of the rear end portion, and is provided around a substantially semicircular partition plate (60) provided at predetermined intervals in the front-rear direction and the partition plate (60). A first rear end partition plate (69) and the first 1 An opening (63) is formed in a portion located between the second rear end partition plate (68) adjacent to the front side of the rear end partition plate (69), and the receiving net (12) is divided into two in the left-right direction. The left opening (12A) having a substantially 1/4 circle shape and the right receiving net (12B) having a substantially 1/4 circle shape are formed, and the opening (63) is formed as a left opening of the left receiving net (12A). The left opening (63A) is formed by the portion (63A) and the right opening (63B) of the right receiving net (12B), and the left opening (63A) is formed by the handling cylinder (11) in the left receiving net (12A) in the rear view. The right opening (63B) is formed in the left middle portion (65A) in the rotation direction of the above, and the upper right hand portion (64B) and the right middle portion in the rotation direction of the handling cylinder (11) in the right receiving net (12B). It is a combine grain removing device characterized by being formed over (65B).

According to the second aspect of the present invention, the left opening (63A) and the right opening (63B) are placed below the handle teeth (54) provided on the outer peripheral portion of the handle body (11) in a side view. The combine harvester according to claim 1, which is located.

According to the third aspect of the present invention, the handling cylinder cover (13) covering the upper part of the handling cylinder (11) is provided on the upper side of the handling cylinder (11), and the left opening (63A) and the right are provided in a side view. The combine threshing device according to claim 1 or 2 , wherein the opening (63B) is located below the dusting plate (14) provided on the inner peripheral portion of the handling cylinder cover (13).

The invention according to claim 4 is provided with a left scraper (73A) for cutting a grain culm at a lower portion of the left opening (63A) in the rotation direction of the handling cylinder (11) in a rear view, and the right opening. The combine threshing device according to any one of claims 1 to 3 , wherein a right scraper (73B) for cutting a grain culm is provided at a lower portion in the rotation direction of the handling cylinder (11) in (63B).

In the invention according to claim 5, a movable partition plate (76) that can move in the radial direction is attached to the second rear end partition plate (68), and the inner peripheral portion of the movable partition plate (76) is attached to the inner peripheral portion of the movable partition plate (76). The combine threshing device according to any one of claims 1 to 4 , wherein the second partition plate (68) is closer to the handling cylinder (11) than the inner peripheral portion.

The invention according to claim 6 is the tooth tip and the tip of the tooth handling tooth (54) on the side where the handling tooth (54) moves downward rather than the side where the handling tooth (54) moves upward in the left-right direction. Any one of claims 1 to 5 in which the axis of the rotating shaft (30) is positioned so as to be offset from the center of the receiving net (12) so that the gap on the inner surface of the receiving net (12) becomes large. The combine threshing device described in the section.

The invention according to claim 7 is the invention according to any one of claims 1 to 6 , wherein the axis of the rotating shaft (30) is located below the center of the receiving net (12) in a front view. The combine harvester described.

The invention according to claim 8 is located on a virtual line (L) in which the axis is centered on the rotation axis (30), passes through the center of the combine harvester (12), and is inclined by 45 degrees with respect to the horizontal plane in a front view. The combine harvester according to claim 7.

According to the invention according to claim 1, on the front and rear walls of the handling chamber (10), a rotating shaft (30) for supporting a substantially cylindrical handling cylinder (11) for degraining the grain net is rotatably installed. , A substantially semi-cylindrical receiving net (12) extending in the front-rear direction along the handling cylinder (11) is provided on the lower side of the handling cylinder (11), and the rear end portion of the receiving net (12) is handled. A substantially semicircular partition plate (60) and a partition plate (60), which are located in front of the rear end of the body (11) and are provided with a receiving net (12) at predetermined intervals in the front-rear direction. ) Is formed by a crosspiece (62) extending in the front-rear direction provided at a predetermined interval in the circumferential direction, and is formed with a first rear end partition plate (69) located at the rear end of the receiving net (12). Since the opening (63) was formed in the portion located between the second rear end partition plate (68) adjacent to the front side of the first rear end partition plate (69), it was formed at the rear end portion of the handling cylinder (11). The transported grain is efficiently dropped downward from the opening (63) of the receiving net (12) and the rear side of the receiving net (12), and the grain is made into a handling cylinder (12) and a receiving net (12). It is possible to prevent clogging between the grains, suppress an increase in the grain removal load, and improve the work efficiency of the grain removal work.

Forming receiving network (12) in 2 divided into left and right directions about a quarter circular left受網(12A) and a substantially 1/4 circular right受網(12B), an opening (63), It is formed by the left opening (63A) of the left receiving net (12A) and the right opening (63B) of the right receiving net (12B), and the left opening (63A) is formed by the left receiving net (12A) in the rear view. The right opening (63B) is formed in the left middle portion (65A) in the rotation direction of the handling cylinder (11) in the right receiving net (12B), and the upper right hand portion (64B) in the rotating direction of the handling cylinder (11) in the right receiving net (12B). Since it was formed over the right middle portion (65B), it prevents the grain from falling excessively from the opening (63A) of the left catch net (12A) and suppresses an increase in grain recovery loss. be able to.

According to the invention of claim 2 , in addition to the effect of the invention of claim 1 , the left opening (63A) and the right opening (63B) are provided on the outer peripheral portion of the handling cylinder (11) in the side view. Since it is located below the provided tooth (54), the grain can be ejected toward the left opening (63A) and the right opening (63B) by the tooth (54), and more efficiently downward. Can be dropped.

According to the invention of claim 3 , in addition to the effect of the invention of claim 1 or 2 , a handling cylinder cover (13) covering the upper part of the handling cylinder (11) is provided on the upper side of the handling cylinder (11). In the side view, the left opening (63A) and the right opening (63B) are positioned below the dust transmission plate (14) provided on the inner peripheral portion of the handling cylinder cover (13). Many deciduous grains treated with a dust plate (14) are collected above the left opening (63A) and the right opening (63B), and downward from the left opening (63A) and the right opening (63B). It can be dropped more efficiently.

According to the invention of claim 4 , in addition to the effect of the invention of any one of claims 1 to 3 , in rear view, the direction of rotation of the handling cylinder (11) at the left opening (63A). Since the left scraper (73A) for cutting the grain is provided in the lower part and the right scraper (73B) for cutting the grain is provided in the lower part in the rotation direction of the handling cylinder (11) in the right opening (63B). By cutting the grain clogs between the handling cylinder (11) and the receiving net (14), the rotational load of the handling cylinder (11) can be reduced, and the increase in the grain removal load can be quickly suppressed.

According to the invention of claim 5 , in addition to the effect of the invention of any one of claims 1 to 4 , the second rear end partition plate (68) has a movable partition plate that can be moved in the radial direction. (76) was attached, and the inner peripheral portion of the movable partition plate (76) was made closer to the handling cylinder (11) than the inner peripheral portion of the second partition plate (68). A large number of grains can be threshed on the front side of 76) to further suppress an increase in grain recovery loss.

According to the invention of claim 6 , in addition to the effect of the invention according to any one of claims 1 to 5 , the tooth handling tooth (54) is more likely to move than the side where the tooth handling tooth (54) moves upward in the left-right direction. The axis of the rotating shaft (30) is set on the receiving net (12) so that the gap between the tooth tip of the handling tooth (54) and the inner side surface of the receiving net (12) on the side where the 54) side moves downward becomes large. Since the position is shifted from the center, the side of the handle (54) of the handle (11) that moves downward, that is, the handle (54) of the handle (11) located at 3 o'clock to 6 o'clock in the clockwise direction. It is possible to increase the work efficiency of the grain removal work by widening the distance between the tooth tip and the inner side surface of the receiving net (12) facing these handling teeth (54) to suppress clogging of the grain stalk. Further, the tooth tip of the handling tooth (54) of the handling body (11) located on the side where the handling tooth (54) of the handling body (11) moves upward, that is, located from 6 o'clock to 9 o'clock in the clockwise direction, and their handling. The spacing between the inner surfaces of the receiving net (12) facing the teeth (54) can be narrowed to improve the threshing performance.

According to the invention of claim 7 , in addition to the effect of the invention of any one of claims 1 to 6 , the axis of the rotating shaft (30) is centered on the rotating shaft (30) and the axis of the receiving net (12) is viewed from the front. Since it is located below the center, the tip of the handle 54 of the handle (11) and the dust plate (14) located above the handle (11), that is, from 9 o'clock to 3 o'clock in the clockwise direction. It is possible to improve the transport performance of transporting the grain culm to the rear portion of the handling chamber (10) by widening the distance between the lower end portions of the culm.

According to the invention of claim 8 , in addition to the effect of the invention of claim 7 , in front view, the axis passes through the axis of rotation (30), passes through the center of the receiving net (12), and with respect to the horizontal plane. Since it is positioned on the virtual line (L) inclined by 45 degrees, the handling cylinder (11) located on the side where the handling teeth (54) of the handling cylinder (11) move upward, that is, clockwise from 3 o'clock to 6 o'clock. The distance between the tip of the tooth handling tooth (54) and the inner side surface of the receiving net (12) facing the tooth handling tooth (54) can be further narrowed to further improve the grain removal performance.

It is a front view of a combine. It is a left side view of the combine. It is a top view of the combine. It is a vertical sectional view in the front-rear direction of a threshing device. It is a vertical sectional view in the left-right direction of a threshing device of a main part. It is a left side view of the handling cylinder. (A) is a plan view of the left and right receiving nets, and (b) is an arrow diagram of AA. It is explanatory drawing of the dust-feeding plate of the handling cylinder cover, the handling tooth of the handling cylinder, and the arrangement of the opening of the receiving net. FIG. 3C is an arrow diagram AA. It is explanatory drawing of the connecting member extending in the front-rear direction, FIG. It is explanatory drawing of the connecting member extending in the circumferential direction, (a) is the plan view of the right receiving net, and (b) is the AA arrow figure. It is explanatory drawing of a scraper, (a) is a plan view of the left-right receiving net, and (b) is an arrow figure AA. It is explanatory drawing of the scraper, and is the rear view of the scraper. It is explanatory drawing of the cutout part of a scraper, (a) is a plan view of a left-right receiving net and the like, and (b) is an arrow figure AA. It is explanatory drawing of the movable partition plate, (a) is a plan view of a left-right receiving net and the like, and (b) is an arrow figure AA. It is explanatory drawing of the arrangement of the handling cylinder and the receiving net, and is the front view of the handling cylinder and the receiving net. It is explanatory drawing of the other arrangement of the handling cylinder and the receiving net, and is the front view of the handling cylinder and the receiving net. It is explanatory drawing of the other arrangement of the handling cylinder and the receiving net, and is the front view of the handling cylinder and the receiving net.

As shown in FIGS. 1 to 3, the general-purpose combine is provided with a traveling device 2 composed of a pair of left and right crawlers traveling on the soil surface under the body frame 1, and harvests culms in the field on the front side of the body frame 1. A pre-cutting processing device 3 is provided, a threshing device 4 for threshing and sorting harvested culms is provided on the rear left side of the pre-cutting processing device 3, and an operator is on the rear right side of the pre-cutting processing device 3. The control unit 5 is provided.

An engine room 6 for incorporating an engine is provided below the control unit 5, a grain tank 7 for storing threshed and sorted grains is provided behind the control unit 5, and a grain tank 7 is provided behind the control unit 5. A discharge auger 8 for discharging grains to the outside is provided.

The pre-cutting treatment device 3 includes a transport device 3A for transporting the grain culms in the field to the rear side while standing up, a cutting blade device 3B for cutting the stock of the grain culms transported to the lower rear side of the transport device 3A. It is composed of an auger device 3C that collects the collected grain culms on the left side and a feeder house 3D that collects the collected grain culms to the grain removal device 4.

As shown in FIGS. 4 and 5, the threshing device 4 is formed by a handling chamber 10 for threshing culms and a sorting chamber 20 for sorting the threshed grains.

On the front and rear walls of the handling chamber 10, a handling cylinder 11 for threshing the culms transported from the feeder house 3D is erected, and on the lower side of the handling cylinder 11, a semicircular arc shape is formed along the lower part of the outer circumference of the handling cylinder 11. The receiving net 12 formed in the above is provided. Further, the upper portion of the handling cylinder 11 is covered with a handling cylinder cover 13 that can be opened and closed, and a dust feeding plate 14 that conveys the culm to the rear left side of the handling chamber 10 is provided on the inner peripheral portion of the handling cylinder cover 13. It is provided.

A swing sorting device 21 for sorting grains leaking from the handling chamber 10 is provided above the sorting chamber 20. At the bottom of the swing sorting device 21, a wall insert 25 that blows the sorting air to the swing sorting device 21 in order from the front side, and a wind split 26 that changes the blowing direction of the sorting wind behind the wall insert 25, and a swing sorting device 21. The first spiral 27 that conveys the grains leaking from the device 21 to the grain tank 7 and the grains with the wall inserts leaking from the rear part of the swing sorting device 21 are transferred to the second processing chamber. A No. 2 spiral 28 to be conveyed and a straw rack 29 to discharge the grain culm that has been threshed to the outside are provided.

As shown in FIG. 6, the handling cylinder 11 includes a rotating shaft 30 rotatably supported by the front and rear walls of the handling chamber 10, an impeller portion 40 supported by the front end portion of the rotating shaft 30, and an impeller on the rotating shaft 30. It is formed from a rotor portion 50 supported on the rear side of the portion 40.

The impeller portion 40 is formed of a circular front plate 41, a circular rear plate 42 having a diameter larger than that of the front plate 41, and a side plate 43 connecting the front plate 41 and the outer peripheral portion of the rear plate 42.

On the outer peripheral surface of the side plate 43, a pair of upper and lower transport spirals 44 for transporting the grain culms transported to the front portion of the impeller portion 40 to the rear portion of the impeller portion 40 are erected. As a result, the culm transferred to the impeller section 40 can be efficiently transferred to the rotor section 50.

A substantially triangular reinforcing rib 45 is provided on the front surface of the transport spiral 44 to connect the side plate 43 and the lower front surface of the transport spiral 44 at a predetermined angle in the circumferential direction. As a result, the rigidity of the transport spiral 44 can be increased, and the transport spiral 44 can be suppressed from being deformed by the load applied to the transport spiral 44 from the grain culm.

The rotor portion 50 is formed of a cylindrical drum 51 and a tooth handling member 52 provided on the outer peripheral portion of the drum 51 at a predetermined interval in the circumferential direction. The tooth handling member 52 includes a pipe-shaped support portion 53 extending along the front-rear direction of the drum 51, and a plurality of round bar-shaped handle teeth 54 provided on the support portion 53 at predetermined intervals in the front-rear direction. Is formed from.

The handling tooth 54 is provided with a receding angle so that the tip of the handling tooth 54 is located on the upper side of the base with respect to the rotation direction of the handling body 11. As a result, it is possible to prevent the grain culm from being entangled with the handling tooth 54. Further, at the rear end portion of the tooth handling member 52, a rectangular protruding plate 55 is provided in place of the handling tooth 54. As a result, the threshed culms transported to the rear part of the drum 51 can be efficiently ejected to the sorting chamber 20.

As shown in FIG. 7, the receiving net 12 is formed of a left receiving net 12A and a right receiving net 12B having a substantially 1/4 arc shape. As a result, the left receiving net 12A and the right receiving net 12B are arranged under the handling cylinder 11, and the left part of the left receiving net 12A and the right part of the right receiving net 12B are connected to facilitate the receiving net 12. Can be formed.

The left receiving net 12A is provided between a substantially 1/4 arc-shaped left partition plate 60A provided at a predetermined interval in the front-rear direction and an adjacent left partition plate 60A at a predetermined interval in the front-rear direction. It is formed of the left auxiliary partition plate 61A, the left partition plate 60A, and the left rail 62A provided on the left auxiliary partition plate 61A at a predetermined interval in the circumferential direction.

In the present specification, in order to facilitate understanding, the left partition plate 60A is divided into three in the circumferential direction in the rear view, and the upper left end of the left partition plate 60A located at the upper end portion in the rotation direction of the handling cylinder 11. The part extending 30 degrees in the circumferential direction (6 o'clock to 5 o'clock in the counterclockwise direction) is called the upper left hand part 64A, and extends 30 to 60 degrees in the circumferential direction (5 o'clock to 4 o'clock in the counterclockwise direction). The part to be formed is referred to as the left middle portion 65A, and the portion extending in the circumferential direction of 60 to 90 degrees (4 o'clock to 3 o'clock in the counterclockwise direction) is referred to as the left lower hand portion 66A.

The left partition 62A erected on the upper left hand portion 64A of the left partition plate 60A is located on the rearmost side from the left partition plate 60A (hereinafter, referred to as the first left partition plate 67A for convenience) located on the frontmost side. The left rail 62A, which extends to the plate 60A (hereinafter referred to as the third left partition plate 69A for convenience) and is erected on the left middle portion 65A of the left partition plate 60A, is installed from the first left partition plate 67A to the third left partition. The left rail 62A extending to the left partition plate 60A (hereinafter, referred to as the second left partition plate 68A for convenience) adjacent to the front side of the plate 69A and erected on the lower left hand portion 66A of the left partition plate 60A is the first. It extends from the left partition plate 67A to the third left partition plate 69A. As a result, in the portion of the left receiving net 12A that is partitioned by the second left partition plate 68A and the third left partition plate 69A, the left opening 63A is formed at the portion located at the left intermediate portion 65A of the left partition plate 60A. Can be done.

Therefore, the grain culm that has been threshed by the handling cylinder 11 is efficiently dropped downward from the portion of the rear portion of the handling cylinder 11 where the left receiving net 12A does not extend and the left opening 63A of the left receiving net 12A. And the threshing load can be reduced. Further, the grain culm that has fallen from the left opening 63A or the like can be efficiently transferred to the rear by the straw rack 29 and discharged to the outside. Further, since the left rail 62A is provided on the left lower hand portion 66A of the left catch net 12A, it is possible to prevent the tall culm from falling excessively.

The left rail 62A erected on the upper left hand portion 64A of the left partition plate 60A is extended from the first left partition plate 67A to the third left partition plate 69A, and the left middle portion 65A and the left lower hand portion 66A of the left partition plate 60A are extended. The left rail 62A erected in the above can be extended from the first left partition plate 67A to the second left partition plate 68A. As a result, similarly to the right receiving net 12B described later, in the portion of the left receiving net 12A partitioned by the second left partition plate 68A and the third left partition plate 69A, the left middle portion 65A and the left lower hand of the left partition plate 60A. A large left opening 63A can be formed in the portion located at the portion 66A.

The right receiving net 12B is provided between a substantially 1/4 arc-shaped right partition plate 60B provided at a predetermined interval in the front-rear direction and an adjacent right partition plate 60B at a predetermined interval in the front-rear direction. It is formed of the right auxiliary partition plate 61B provided, and the right partition plate 60B and the right rail 62B provided on the right auxiliary partition plate 61B at predetermined intervals in the circumferential direction.

In the present specification, in order to facilitate understanding, the right partition plate 60B is divided into three in the circumferential direction in the rear view, and the left end portion of the right partition plate 60B located at the upper end portion in the rotation direction of the handling cylinder 11. The part extending from 30 degrees in the circumferential direction (9 o'clock to 8 o'clock in the counterclockwise direction) is called the upper right hand part 64B, and extends from 30 to 60 degrees in the circumferential direction (8 o'clock to 7 o'clock in the counterclockwise direction). The portion is referred to as the right middle portion 65B, and the portion extending in the circumferential direction of 60 to 90 degrees (7 o'clock to 6 o'clock in the counterclockwise direction) is referred to as the lower right hand portion 66B.

The right rail 62B erected on the upper right hand portion 64B and the right middle portion 65B of the right partition plate 60B is located on the frontmost side from the right partition plate 60B (hereinafter, referred to as the first right partition plate 67B for convenience). Extends to the right partition plate 60B (hereinafter referred to as the second right partition plate 68B for convenience) adjacent to the front side of the right partition plate 60B (hereinafter referred to as the third right partition plate 69B for convenience) located in The right rail 62B erected on the lower right hand portion 66B of the right partition plate 60B extends from the first right partition plate 67B to the third right partition plate 69B. As a result, in the portion of the right receiving net 12B that is partitioned by the second right partition plate 68B and the third right partition plate 69B, a large right opening is made in the portion located at the upper right hand portion 64B and the right middle portion 65B of the right partition plate 60B. Part 63B can be formed.

Therefore, the grain culm that has been threshed by the handling cylinder 11 is efficiently dropped downward from the portion of the rear portion of the handling cylinder 11 where the right receiving net 12B does not extend and the right opening 63B of the right receiving net 12B. And the threshing load can be reduced. Further, the grain culm that has fallen from the right opening 63B or the like can be efficiently transferred to the rear by the straw rack 29 and discharged to the outside.

In the present specification, the left partition plate 60A and the right partition plate 60B are collectively referred to as a partition plate 60, and the left auxiliary partition plate 61A and the right auxiliary partition plate 61B are collectively referred to as an auxiliary partition plate 61, and are referred to as a left rail 62A. The right crosspiece 62B is collectively referred to as a crosspiece 62, the left opening 63A and the right opening 63B are collectively referred to as an opening 63, and the first left partition plate 67A and the first right partition plate 67B are collectively referred to as the first first. The partition plate 67 is referred to, and the second left partition plate 68A and the second right partition plate 68B are collectively referred to as the second partition plate (“second rear end partition plate” in the claims) 68, and the third left partition plate 69A. And the third right partition plate 69B are collectively referred to as a third partition plate (“first rear end partition plate” in the claims) 69.

As shown in FIG. 8, the length of the opening 63 in the front-rear direction is formed to be the same as the distance between the teeth 54 adjacent to the handle 11 in the front-rear direction, and the front portion of the opening 63 is formed. The second partition plate 68 for partitioning is provided in the middle in the front-rear direction of the second and third handling teeth 54 counting from the rear side, and the third partition plate 69 for partitioning the rear portion of the opening 63 is from the rear side. It is provided in the middle of the first and second handling teeth 54 in the anteroposterior direction. As a result, the decrease in the rigidity of the rear portion of the receiving net 12 is suppressed, and the threshed culm entwined from the second handling tooth 54 counted from the rear side is efficiently dropped from the opening 63 to reduce the threshing load. It can be mitigated.

Further, the first dust feed plate 14 counting from the rear side of the handling cylinder cover 13 is a portion facing the opening 63, that is, the dust feed plate 14 is a second partition plate for partitioning the front portion of the opening 63. It is provided across the 68 and the third partition plate 69 that partitions the rear part. As a result, the threshed culm can be efficiently transported to the rear left side and dropped from the opening 63 to reduce the threshing load.

As shown in FIG. 9, a connecting member 70 extending in the front-rear direction is provided between the second right partition plate 68B and the third right partition plate 68C in the middle of the right opening 63B of the right receiving net 12B in the circumferential direction. be able to. As a result, it is possible to prevent the tall culm that has been threshed from falling excessively from the right opening 63B. The connecting member 70 is preferably formed of a round bar in order to prevent the culm from wrapping around.

As shown in FIG. 10, a substantially 1/4 arc-shaped connecting member 71 extending in the circumferential direction can be provided in the middle of the right opening 63B of the right receiving net 12B in the front-rear direction. As a result, it is possible to prevent the tall culm that has been threshed from falling excessively from the right opening 63B.

As shown in FIG. 11, a left scraper 73A for cutting the culm is provided at the upper end of the non-opening located on the lower side of the left opening 63A of the left catch net 12A, and the right opening of the right catch net 12B is provided. A right scraper 73B for cutting the culm can be provided at the upper end of the non-opening located on the lower side of the 63B. As a result, the portion of the grain culm that hangs downward from the left opening 63A and the right opening 63B can be cut and dropped efficiently, and the threshing load can be quickly reduced. Further, in the form shown in FIG. 11, the left scraper 73A is provided on the left receiving net 12A and the right scraper 73B is provided on the right receiving net 12B, but either the left receiving net 12A or the right receiving net 12B is provided with the right scraper 73B. Only the scraper 73 can be provided. In this specification, the left scraper 73A and the right scraper 73B are collectively referred to as the scraper 73.

As shown in FIG. 12, the right scraper 73B is provided so as to extend toward the upper side in the rotation direction of the handling cylinder 11 substantially orthogonal to the handling teeth 54 of the handling cylinder 11. Further, the right scraper 73B is attached to the inner peripheral portion of the receiving net 12 by a fastening means such as a bolt so that the right scraper 73B can be taken in and out toward the upper side in the rotation direction of the handling cylinder 11. Thereby, the gap between the handling tooth 54 of the handling cylinder 11 and the right scraper 73B can be adjusted according to the seed pair of the harvested culm to improve the cutting efficiency. Since the left scraper 73A is the same as the right scraper 73B, the description thereof will be omitted.

As shown in FIG. 13, in a plan view, a rectangular notch 74A is provided substantially in the middle of the left scraper 73A in the front-rear direction, and a rectangular cut is provided substantially in the middle of the right scraper 73B in the front-rear direction. A notch 74B is provided. As a result, the portion of the culm that hangs downward from the left opening 63A and the right opening 63B can be cut and dropped more efficiently, and the threshing load can be reduced more quickly.

As shown in FIG. 14, a left movable partition plate 76A having a substantially 1/4 arc shape that can move in the radial direction is attached to the rear side of the second left partition plate 68A, and the inside of the left movable partition plate 76A is viewed from the rear. The peripheral portion is located inside the inner peripheral portion of the second left partition plate 68A in the radial direction, that is, the inner peripheral portion of the left movable partition plate 76A is located closer to the handling cylinder 11 than the inner peripheral portion of the second left partition plate 68A. Let me. Further, a right movable partition plate 76B having a substantially 1/4 arc shape that can move in the radial direction is attached to the rear side of the second right partition plate 68B, and the inner peripheral portion of the right movable partition plate 76B is seconded in the rear view. The inner peripheral portion of the right partition plate 68B in the radial direction, that is, the inner peripheral portion of the right movable partition plate 76B is located closer to the handling cylinder 11 than the inner peripheral portion of the second right partition plate 68B. In this specification, the left movable partition plate 76A and the right movable partition plate 76B are collectively referred to as a movable partition plate 76.

As a result, the grain culm that has been transported rearward between the handling cylinder 11 and the receiving net 12 is blocked by the front side of the movable partition plate 76, and threshing is performed at a portion of the receiving net 12 in front of the movable partition plate 76. It is possible to promote the fall of the treated grains and suppress the fall of the grains from the opening 63 on the rear side of the movable partition plate 76.

<Position of handling cylinder and receiving net>
As shown in FIG. 15, the center of the rotating shaft 30 that supports the handling cylinder 11 is positioned on the right side of the center of the receiving net 12 in the front view. As a result, the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower right side of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, clockwise from 6 o'clock to 9 o'clock during rotation, and these handling teeth 54. It is possible to improve the threshing performance by narrowing the distance between the inner surfaces of the receiving net 12 facing the surface. Further, in the lower left side of the culm 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the culms 11 located clockwise from 3 o'clock to 6 o'clock during rotation and these culms 54 It is possible to improve the clogging suppressing performance of suppressing the clogging of the grain culms by widening the distance between the inner surfaces of the facing nets 12. In addition, in the axial view of the rotating shaft 30, the handling force of the handling teeth 54 and the own weight of the culm act downward between the handling cylinder 11 and the receiving net 12 located clockwise from 3 o'clock to 6 o'clock during rotation. Therefore, it is the place where the grain culm is most likely to be clogged. Further, the arrows in the drawing indicate the rotation direction of the handling cylinder 11.

In the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 are positioned on the upper side in the rotational direction with respect to the base portion and are fixed to the support portion 53. As a result, the grain culms transferred from the impeller section 40 to the rotor section 50 can be efficiently transported from the front portion to the rear portion of the drum 51. Further, the handle teeth 54 are fixed at two positions, an inner peripheral portion and an outer peripheral portion in the radial direction of the support portion 53. As a result, the handling tooth 54 can be firmly fixed to the support portion 53, and the handling tooth 54 can be prevented from falling off.

As shown in FIG. 16, the center of the rotation shaft 30 of the handling cylinder 11 is positioned below the center of the receiving net 12 in the front view. As a result, in the lower part of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 of the handling cylinder 11 located clockwise from 3 o'clock to 9 o'clock during rotation and these handling teeth 54 It is possible to improve the threshing performance by narrowing the distance between the inner surfaces of the facing nets 12. Further, in the upper part of the handling cylinder 11, that is, in the axial view of the rotating shaft 30, the tooth tips of the handling teeth 54 of the handling cylinder 11 and the dust sending plate of the handling cylinder cover 13 located at 9 o'clock to 3 o'clock in the clockwise direction during rotation. It is possible to improve the transport performance of transporting the grain culms to the rear portion of the handling chamber 10 by widening the distance between the lower end portions of 14. The arrows in the figure indicate the rotation direction of the handling cylinder 11.

As shown in FIG. 17, the center of the rotating shaft 30 of the handling cylinder 11 is on the lower right side of the center of the receiving net 12, that is, in the axial view of the rotating shaft 30, the rotating shaft 30 of the handling cylinder 11 The center is located on the virtual line L extending 45 degrees to the lower right of the center of the receiving net 12. As a result, the distance between the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower right side of the handling cylinder 11 and the inner side surface of the receiving net 12 facing these handling teeth 54 is further narrowed to further improve the threshing performance. be able to. Further, the distance between the tooth tips of the handling teeth 54 of the handling cylinder 11 located at the lower left side of the handling cylinder 11 and the inner side surface of the receiving net 12 facing these handling teeth 54 is widened to suppress clogging of the grain culm. The clogging suppression performance can be improved. Further, the distance between the tip of the tooth 54 of the handling cylinder 11 located at the upper part of the handling cylinder 11 and the lower end portion of the dust transmitting plate 14 of the handling cylinder cover 13 is widened to convey the grain culm to the rear part of the handling chamber 10. The transport performance can be improved. The arrows in the figure indicate the rotation direction of the handling cylinder 11.

10 Handling chamber 11 Handling cylinder 12 Receiving net 12A Left receiving net 12B Right receiving net 13 Handling cylinder cover 14 Dust transmission plate 20 Sorting chamber 30 Rotating shaft 54 Handling teeth 60 Partition plate 62 Crosspiece 63 Opening 63A Left opening 63B Right opening 64B Upper right hand part 65A Left middle part 65B Right middle part 68 Second partition plate (second rear end partition plate)
69 3rd partition plate (1st rear end partition plate)
73A Left scraper 73B Right scraper 76 Movable partition plate L Virtual line

Claims (8)

In a combine harvester equipped with a handling room (10) for threshing grain culms and a sorting room (20) for sorting the threshed grains below the handling room (10).
A rotating shaft (30) for supporting a substantially cylindrical handling cylinder (11) for threshing the culm is rotatably erected on the front and rear walls of the handling chamber (10).
A substantially semi-cylindrical receiving net (12) extending in the front-rear direction along the handling cylinder (11) is provided below the handling cylinder (11).
The rear end portion of the receiving net (12) is positioned on the front side of the rear end portion of the handling cylinder (11).
The receiving net (12) is provided on a substantially semicircular partition plate (60) provided at a predetermined interval in the front-rear direction and on the partition plate (60) at a predetermined interval in the circumferential direction. It is formed by a crosspiece (62) extending in the front-back direction.
Between the first rear end partition plate (69) located at the rear end of the receiving net (12) and the second rear end partition plate (68) adjacent to the front side of the first rear end partition plate (69). An opening (63) is formed in the located portion, and the opening (63) is formed.
The receiving net (12) is formed by a substantially 1/4 circular left receiving net (12A) and a substantially 1/4 circular right receiving net (12B) that divides the receiving net (12) into two in the left-right direction.
The opening (63) is formed by the left opening (63A) of the left receiving net (12A) and the right opening (63B) of the right receiving net (12B).
In rear view, the left opening (63A) is formed in the left middle portion (65A) in the rotation direction of the handling cylinder (11) in the left receiving net (12A), and the right opening (63B) is formed in the right opening (63B). A combine harvester characterized by being formed over the upper right hand portion (64B) and the right middle portion (65B) in the rotation direction of the handling cylinder (11) in the right receiving net (12B). In side view, the left-opening (63A) and a right opening (63B), the thresher according to claim 1, wherein was located below the (11)扱歯provided on the outer peripheral portion of (54) Combine threshing device. A handling cylinder cover (13) covering the upper part of the handling cylinder (11) is provided on the upper side of the handling cylinder (11).
In a side view, claim was positioned on the lower side of the left-opening (63A) and a right opening (63B), thresher cover (13) Okuchiri plate provided on the inner peripheral portion (14) 1 Or the combine threshing device according to 2. In rear view, a left scraper (73A) for cutting a grain culm is provided at a lower portion in the rotation direction of the handling cylinder (11) at the left opening (63A), and the handling cylinder (63B) at the right opening (63B) is provided. The combine threshing device according to any one of claims 1 to 3 , wherein a right scraper (73B) for cutting a grain culm is provided at a lower portion in the rotation direction of 11). A movable partition plate (76) that can move in the radial direction is attached to the second rear end partition plate (68).
The combine according to any one of claims 1 to 4 , wherein the inner peripheral portion of the movable partition plate (76) is closer to the handling cylinder (11) than the inner peripheral portion of the second partition plate (68). Threshing device. In the left-right direction, the tooth tip of the handling tooth (54) and the inner surface of the receiving net (12) on the side where the handling tooth (54) moves downward rather than the side where the handling tooth (54) moves upward. The combine harvester according to any one of claims 1 to 5 , wherein the axis of the rotating shaft (30) is displaced from the center of the receiving net (12) so that the gap between the two is large. .. The combine harvester according to any one of claims 1 to 6 , wherein the axis of the rotary shaft (30) is located below the center of the net (12) in a front view. The combine according to claim 7 , wherein in front view, the axis of the axis of rotation (30) is located on a virtual line (L) that passes through the center of the receiving net (12) and is inclined by 45 degrees with respect to a horizontal plane. Threshing device.

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