JP7160717B2 - combine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a combine harvester whose discharge port for threshed dust is covered with a dust discharge cover.

Generally, in a combine harvester, culms harvested in a harvesting section are threshed in a threshing section, and then sorted into grains and dust in a sorting section. The grains sorted by the sorting section are conveyed to the grain tank and discharged out of the machine through the discharge auger. In addition, waste materials such as waste straw sorted by the sorting section are discharged out of the machine through a discharge port provided at the rear of the threshing section. Since it is thrown into the part, a large amount of dust is discharged out of the machine from the discharge port.

In such a general-purpose combine harvester, a dust cover covering the discharge port is attached to the rear end of the traveling machine body, and the dust discharged from the discharge port is already removed through a guide plate provided inside the dust discharge cover. There is a conventionally known technology that discharges to the harvested land side (see Patent Literature 1).

JP 2012-029657 A

However, in the general-purpose combine harvester described in Patent Document 1, dust such as waste straw guided and guided toward the already cut ground by the dust discharge cover falls across the track of one of the left and right crawlers. It was troublesome to collect the dust that fell on the track.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a combine harvester that facilitates collection of dust.

The combine according to the present invention comprises a machine body (3) supported by a pair of left and right traveling devices (2), a reaping part (5) provided on the front side of the machine body (3) so as to be vertically movable, and the reaping part ( A threshing and sorting unit (7, 9) for threshing and sorting the culms harvested in 5), and a grain tank (10) for storing the grains sorted by the threshing and sorting unit (9). a discharge port (31) for discharging the dust discharged from the threshing and sorting section (9) to the outside of the machine body (3); a dust discharge cover (33) covering the discharge port (31) ; and a guide guide (37) for guiding the dust discharged from the discharge port (31). 33c) extends in the vertical direction, and the distance ( L1) is arranged to be shorter than any of the distances (L2, L3) in the left-right direction between the side plate (33c) inside the fuselage and the traveling devices (2a, 2b) ( L1<L2). , L3), and the guide (37) is located at the center between the pair of traveling devices (2a, 2b) in the left-right direction among the plurality of guide guides (37, 38) provided in the left-right direction. It is the guide that is the farthest from the position, and the guide surface that guides the dust is inclined downward toward the inside of the machine body, and when the machine body (3) is viewed from the rear, the guide guide ( The extension line (Y1) of the guide surface of 37) and the extension line (P) of the guide surface of the side plate (33c) inside the machine body that guides the dust are the left and right traveling devices (2a, 2b). It is characterized in that it is configured to intersect between and above the contact surfaces of the traveling devices (2a, 2b) .

Further, the threshing and sorting section (7, 9) includes a threshing drum (20) that rotates around a rotation axis (C2) extending in the longitudinal direction of the machine body, and the dust cover (33) is provided with the rotation axis. The distance (L4) between (C2) and the side plate (33c) inside the fuselage is greater than the distance (L5) between the axis of rotation (C2) and the side plate (33c) outside the fuselage (L4>L5). preferred.

The reference numerals in parentheses above are for comparison with the drawings, but do not limit the configuration of the present invention.

According to the first aspect of the present invention, the distance in the left-right direction between the side plate on the inside of the body of the dust cover and the center position between the pair of traveling devices is equal to the distance between the side plate on the inside of the body and each traveling device. It is configured to be shorter than any distance in the left-right direction. Therefore, the dust that falls along the inner side plate of the dust cover can be accumulated between the left and right crawler tracks (ruts), making it easier to collect the dust. can.

Further , the guide guide is arranged such that the extension line of the guide surface and the extension line of the guide surface of the side plate on the inner side of the machine body for guiding dust are located between the left and right traveling devices and more than the ground contact surface of the traveling device. It is configured to intersect at the top. Therefore, the guiding guide can guide the dust between the traces (ruts) of the left and right crawlers.

Furthermore , the above-mentioned guide is the guide that is farthest from the central position between the pair of traveling devices in the left-right direction among the plurality of guides provided in the left-right direction. Therefore, even if the guiding guide is the outermost guiding guide, it is possible to guide the waste matter between the running tracks (ruts) of the left and right crawlers.

According to the second aspect of the present invention, the dust cover is arranged such that the distance between the rotation axis of the threshing cylinder and the side plate on the inside of the fuselage is larger than the distance between the rotation axis of the threshing cylinder and the side plate on the outside of the fuselage. It has become. By doing so, the dust can be collected between the trails (ruts) of the left and right crawlers without expanding the dust cover to the outside of the machine body.

The side view of the general-purpose combine to which this invention is applied. The top view of the general-purpose combine to which this invention is applied. Sectional drawing which shows the threshing part and the sorting part. The rear view of the general-purpose combine to which this invention is applied. FIG. 2 is a plan view of the main parts of the rear side of the machine body including the dust cover. Explanatory drawing which shows the discharge route of waste matter.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a general-purpose combine harvester 1 has a machine body 3 supported by a pair of left and right crawler-type traveling devices 2 . On the front side of the machine body 3, a reaping part 5 for cutting grain culms in the field is provided so as to be able to move up and down. An operation unit 6 is provided. On the other side of the machine body 3, a threshing unit 7 for threshing the culms harvested and transported by the reaping unit 5 is provided. A sorting unit 9 for sorting is provided. Behind the operation unit 6, a grain tank (grain tank) 10 for storing grains sorted by the sorting unit 9 and a grain stored in the grain tank 10 are discharged to the outside of the machine. A discharge auger 11 is provided for.

The reaping unit 5 includes a divider 12 for dividing grain culms in a field, a reciprocating cutting blade 13 for reaping the grain culms divided by the divider 12, and a reciprocating blade 13 disposed behind the cutting blade 13. and a rake reel 15 disposed above the dividers 12 and the cutting blades 13. The rake reel 15 rakes the grain culm into the platform 14. A blade 13 is configured for reaping. The culms cut by the cutting blade 13 are laterally fed to the conveying device 16 by a platform auger (not shown) in the platform 14, and then fed to a feeder 19 (Fig. 3) disposed inside the conveying device 16. ) is transported backward. The terminal end of the feeder 19 is connected to the upper front end side of the threshing section 7, and is configured to feed the harvested grain into the threshing section 7 together with the harvested culms.

As shown in FIG. 3, the threshing unit 7 includes a threshing chamber 17 into which the culms harvested by the reaper 5 are thrown, and a threshing chamber 17 rotatably supported in the threshing chamber 17. The guide plate 20a is provided with a plurality of projecting teeth 20b for hooking grain culms and rotating them together with the threshing cylinder 20. A transmission pulley 21 is attached to the rear end of the handling cylinder 20 , and the transmission pulley 21 is surrounded by a transmission system cover 22 provided on the rear end side of the handling chamber 17 . The threshing chamber 17 has a lower side (lower portion of the threshing drum 20) formed by a semi-cylindrical receiving net 23 along the outer circumference of the threshing drum 20, and the grain put into the threshing chamber 17 is The culms are rotated together with the threshing drum 20 by the threshing teeth 20b and are threshed by being rubbed by the receiving net 23 while being transported to the rear side of the machine body by the guide plate 20a.

The sorting unit 9 includes a swing sorting body 24 for swinging and sorting the grains that have passed through the receiving net 23, a sorting case 25 enclosing the swing sorting body 24, and a winnow fan 26 for blowing sorting air. , and a second sorting fan 27 for discharging the sorted dust to the outside of the machine. As a result, the threshed grain that has fallen from the receiving net 23 is dropped onto the chaff sieve 28 of the rocking sorter 24 and is sorted by the chaff sieve 28 while leaking further downward. The leaked threshed grains are sorted into grains, which are the first sorted grains, and second sorted grains by the sorting wind from the winnow fan 26 . The sorted grains are transported by a grain-lifting screw 29 into a grain tank 10 storing grains and discharged out of the machine via a discharge auger 11 extending from the rear end of the upper surface of the machine body 3 .

Further, the second item is returned to the swing sorting body 24 by the return screw 30, and the sorting operation is performed again. In the present embodiment, the general-purpose combine 1 is provided with a discharge port 31 behind the threshing section 7 . During the grain threshing on the rocking sorting body 24, dust such as waste straw sorted out by the sorting section 9 is discharged out of the machine. That is, in the present embodiment, the threshing section 7 and the sorting section 9 described above constitute the threshing and sorting sections 7 and 9 for threshing and sorting the stalks harvested by the harvesting section 5. Dust discharged from the sorting section is discharged from the discharge port 31 . The discharge port 31 is surrounded by a dust discharge case 32 formed in a gate shape, and a dust discharge cover 33 is attached to the dust discharge case 32 for guiding and dropping the discharged dust to the field. there is

As shown in FIGS. 4, 5 and 6, a fuel tank 34, a fuel filler port 35, and the like are disposed on the rear side of the grain tank 10, and a part of the fuel tank 34 is the threshing part. 7 and the grain tank 10 and is arranged in a space S extending in the left-right direction. A pair of left and right vertical frames 36 a and 36 b are provided on the main frame 36 at the rear end of the machine body. The shaft portion of the handling cylinder 20 is supported by the rear end frame 36c that spans the vertical frames 36a and 36b. An extension frame 36d reaching into S is formed.

The dust discharge cover 33 is composed of a back plate 33a facing the discharge port 31 and a pair of side covers 33b and 33c provided on the left and right sides of the back plate 33a. The rear plate 33a is inclined downward from the rear end frame 36c toward the rear of the fuselage, and the pair of side covers 33b and 33c are vertically arranged with the rear plate 33a interposed therebetween. Of these side covers 33b and 33c, the side cover 33b positioned on the outer side of the machine body (on the left side when viewed from the rear side of the dust cover 33) extends rearward from the left vertical frame 36a. A side cover 33c positioned inside (on the right side of the dust cover 33 as viewed from the back) extends rearward from an extension frame 36d formed closer to the center of the machine body than the right vertical frame 36b. By extending the right side cover 33c of the dust discharge cover 33 to the rear of the extension frame 36d extending to the space S, the side cover 33c can be attached to the left and right crawlers 2a and 2b of the traveling device 2. are arranged along a vertical line (a two-dot chain line P in FIG. 6) passing through the center of the .

That is, of the side plates of the dust discharge cover 33 that face each other in the left-right direction of the machine body, the side cover 33c as the side plate inside the machine body extends in the vertical direction, and the side cover 33c and the crawler as a pair of traveling devices are provided. The lateral distance L1 between the crawlers 2a and 2b and the center position C1 is arranged so that it is shorter than either of the lateral distances L2 and L3 between the side cover 33c and the crawlers 2a and 2b. is doing.

In addition, when looking at the dust discharge cover 33 as a whole, the dust discharge cover 33 is formed so as to expand toward the inside of the machine body with respect to the threshing section 7, and is aligned with the rotation axis (rotation center) C2 of the threshing cylinder 20 extending in the longitudinal direction of the machine body. A distance L4 to the side cover 33c is larger than a distance L5 between the rotation axis C2 and the side cover 33b as a side plate on the outer side of the fuselage (L4>L5).

A guide plate 37 and an auxiliary guide plate 38 are provided inside the dust discharge cover 33, and the dust discharged from the discharge port 31 is guided by the guide plate 37 and the auxiliary guide plate 38 in the left and right direction of the machine body ( For example, it is guided to the already harvested land side where the harvesting work has already been completed. The guide plate 37 is installed between the inner side of the rear plate 33a and the inner side of the left side cover 33b. ing. The guide plate 37 and the auxiliary guide plate 38 serving as a plurality of guide guides for guiding the discharged dust are arranged so that the end (lower end) of the dust discharge cover 33 on the dust discharge port 39 side is the end on the discharge port 31 side. It is inclined downward in the left-right direction of the fuselage so that it is closer to the inside of the fuselage than the part (upper end).

Next, referring to FIG. 6, a description will be given of the flow until dust such as waste straw discharged from the discharge port 31 is discharged. As shown in FIG. 6, the dust discharge port 39 is covered with a dust discharge cover 33 to prevent dust from scattering, and is moved downward by a guide plate 37 and an auxiliary guide plate 38 toward the inside of the machine body. You will be guided

The guide plate 37 is the outermost guide of the body excreted at the position farthest from the central position C1 between the crawlers 2a and 2b in the left-right direction among a plurality of guides, and guides the waste matter. An extension line Y1 of the surface intersects an extension line P of the side cover 33c at an intersection X1 between the left and right crawlers 2a and 2b and above the contact surface of the crawlers 2a and 2b. ing. Therefore, the dust discharged between the guide plate 37 and the auxiliary guide plate 38 is guided along the route R2 to the inside of the machine body, and finally falls and accumulates between the crawlers 2a and 2b. .

Similarly to the guide plate 37, the auxiliary guide plate 38 also has an extension line Y2 of the guide surface that guides the dust, which is between the extension line P of the side cover 33c and the left and right crawlers 2a and 2b, and between the crawlers 2a and 2b. The ground surfaces of 2a and 2b and the intersection X1 are configured to intersect at the intersection X2 above. Therefore, the dust discharged between the auxiliary guide plate 38 and the side cover 33c is guided along the route R1 to the inside of the machine body, and finally falls between the crawlers 2a and 2b and accumulates. do.

It should be noted that dust that collides with the side cover 33c falls along the side cover 33c, which is a vertical wall. The side cover 33c protrudes inside the machine body to a central portion between the left and right crawlers 2a and 2b, more specifically, to a position slightly beyond the central position C1 between the left and right crawlers 2a and 2b. ing. For this reason, the dust that has collided with the side cover 33c also falls and accumulates in the central portion between the crawlers 2a and 2b along the side cover 33c.

As described above, in the general-purpose combine 1 according to the embodiment of the present invention, the space S on the rear side of the machine body existing between the threshing part 7 and the grain tank 10 is effectively used, and the dust cover 33 is removed. By providing the inner side cover 33c near the center of the machine body, it is possible to accumulate dust such as discharged straws between the running tracks (ruts) of the left and right crawlers 2a and 2b. Further, the extension lines Y1 and Y2 of the guide plate 37 and the auxiliary guide plate 38 do not cross the outline of the crawler 2a, and the intersection points X1 and Y2 of the extension lines Y1 and Y2 and the extension line P of the side cover 33c are arranged. X2 is positioned between the crawlers 2a and 2b, and the intersection of the paths R1 and R2 is positioned between the left and right crawlers 2a and 2b. Dust can be accumulated between the trails (ruts) of the left and right crawlers 2a and 2b.

Furthermore, when enlarging the dust discharge cover 33 in the left-right direction, the space S is effectively used without enlarging the threshing part 7, so that the left-right space of the rear part of the machine body can be used in a well-balanced manner. It is possible to achieve both effective utilization and facilitation of the dust collection work. In addition, since the dust cover 33 expands in the width direction toward the inside of the machine body, the opening (for example, the space between the auxiliary guide plate 38 and the side cover 33c) expands. Therefore, even if a large amount of dust is instantaneously discharged from the threshing and sorting units 7 and 9, the dust can be smoothly discharged to the outside of the machine without clogging.

In the above-described embodiment, a full crawler type combine has been described, but the present invention is not limited to this, and may be applied to a combine having running wheels or a half crawler type running device, for example. can. Moreover, it is applicable not only to a general-purpose combine harvester but also to any kind of combine harvester such as a self-removing combine harvester.

Furthermore, in the above-described embodiment, the guide surfaces of the guide plate 37 and the auxiliary guide plate 38 have different angles of inclination between the main surface that determines the ejection direction of the dust and the surface on the lower end side. The extension lines Y1 and Y2 of the guide surfaces in the embodiment refer to extension lines of the main surfaces that determine the ejection direction of the dust. Moreover, this also applies to the extension line of the side cover 33c. Furthermore, in the above-described embodiment, the extension line P of the side cover 33c protrudes inside the machine body to a position slightly beyond the central position C1 between the left and right crawlers 2a and 2b. For example, the extension line P of the side cover 33c may protrude inward to a position where it coincides with the central position C1. It may be configured to protrude to.

Further, in the above-described embodiment, a configuration has been described in which dust discharged from both the threshing section 7 and the sorting section 9 is discharged from one discharge port 31 to the outside of the machine, but the threshing and sorting section Discharge ports for discharging dust from the threshing section 7 and the sorting section 9 may be provided separately. These separately provided discharge ports may be covered with a single dust discharge cover to which the present invention is applied. Invention may be applied. In other words, the dust discharge cover may be configured to cover the discharge port for discharging the dust discharged from the threshing and sorting section to the outside of the machine.

1 combine (general-purpose combine)
2 traveling device 3 machine body 5 reaping units 7 and 9 threshing and sorting unit 10 grain tank (grain tank)
31 exhaust port 33 dust exhaust cover 33c side cover 37 inside the machine body guide guide (guide plate)
C1 Center position C2 Rotation axis P Extension line Y1 Extension lines L1 to L5 Distance

Claims (2)

A fuselage supported by a pair of left and right traveling devices;
a reaping unit provided on the front side of the body so as to be able to move up and down;
a threshing and sorting unit for threshing and sorting the culms harvested by the harvesting unit;
a grain tank for storing grains sorted by the threshing sorting unit;
a discharge port for discharging the dust discharged from the threshing and sorting unit to the outside of the machine body;
a dust discharge cover covering the discharge port;
a guide guide that guides the dust discharged from the discharge port ,
Of the side plates of the dust discharge cover that face each other in the left-right direction of the body, the side plate on the inside of the body extends in the vertical direction, and the side plate on the inside of the body and the center position between the pair of traveling devices. arranged so that the distance in the horizontal direction between the two is shorter than any distance in the horizontal direction between the side plate on the inside of the fuselage and each traveling device ;
The guidance guide is
Among the plurality of guide guides provided in the left-right direction, the guide guide that is the farthest from the center position between the pair of traveling devices in the left-right direction,
A guide surface that guides dust is inclined downward toward the inside of the machine body, and when the machine body is viewed from the rear, an extension line of the guide surface of the guide guide and a side plate on the inside of the machine body are aligned. and an extension line of a guide surface that guides dust and dirt intersects between the left and right traveling devices and above the ground contact surface of the traveling device.
A combine characterized by: The threshing and sorting unit includes a threshing cylinder that rotates about a rotation axis extending in the longitudinal direction of the machine body,
In the dust discharge cover, the distance between the rotation axis and the side plate on the inside of the body is greater than the distance between the rotation axis and the side plate on the outside of the body.
The combine according to claim 1 , characterized by:

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