JP2021065148A - Harvester - Google Patents

Abstract

To provide a harvester capable of reducing effectively a surface temperature of an exhaust pipe.SOLUTION: The harvester includes an engine E, and an exhaust pipe 17 through which exhaust of engine E flows. The exhaust pipe 17 has a first exhaust pipe member 29 constituting an exhaust upstream side part of the exhaust pipe 17, and a second exhaust pipe member 30 constituting an exhaust downstream side part of the exhaust pipe 17. The first exhaust pipe member 29 and the second exhaust pipe member 30 are constituted of a double pipe member.SELECTED DRAWING: Figure 5

Description

The present invention relates to a harvester.

Conventionally, as a harvester, for example, the harvester described in Patent Document 1 is known. The harvester described in Patent Document 1 includes an engine and an exhaust pipe through which the exhaust gas of the engine flows. The exhaust pipe includes a plurality of exhaust pipe members (in the literature, "first exhaust pipe [28], second exhaust pipe [29], third exhaust pipe [30], and fourth exhaust pipe [31]". ") Is provided.

Japanese Unexamined Patent Publication No. 2015-178793

In the harvester described in Patent Document 1, since the exhaust pipe member is composed of a single pipe member, the surface temperature of the exhaust pipe tends to be high.

In view of the above situation, there is a demand for a harvester capable of effectively reducing the surface temperature of the exhaust pipe.

The features of the present invention include an engine and an exhaust pipe through which the exhaust of the engine flows. The exhaust pipe includes a first exhaust pipe member constituting an exhaust upstream side portion of the exhaust pipe and the exhaust pipe. Among them, a second exhaust pipe member constituting a portion on the downstream side of the exhaust is provided, and the first exhaust pipe member and the second exhaust pipe member are composed of a double pipe member.

According to this characteristic configuration, an air layer is formed between the inner pipe and the outer pipe in each of the first exhaust pipe member and the second exhaust pipe member. As a result, the temperature of the exhaust gas flowing through the inner pipe is less likely to be transmitted to the surface of the outer pipe. Thereby, the surface temperature of the exhaust pipe can be effectively reduced.

Further, in the present invention, the exhaust downstream end of the first exhaust pipe member is composed of a single pipe portion, and the exhaust upstream end of the second exhaust pipe member is the exhaust downstream of the first exhaust pipe member. It is preferable that the side ends overlap with each other at intervals in the radial direction from the outer side in the radial direction.

According to this feature configuration, the outside air introduction portion for introducing the outside air into the inside of the exhaust pipe is configured by the gap between the exhaust upstream side end portion of the second exhaust pipe member and the exhaust downstream side end portion of the first exhaust pipe member. Will be. As a result, the temperature of the exhaust gas in the exhaust pipe can be reduced. Here, if the exhaust downstream end of the first exhaust pipe member is composed of a double pipe portion, the exhaust upstream end of the second exhaust pipe member is set to the exhaust downstream end of the first exhaust pipe member. Since it is necessary to make the diameter of the second exhaust pipe member larger than that of the double pipe portion in order to overlap the end portion with a radial interval from the outside in the radial direction, the exhaust downstream side of the second exhaust pipe member There is concern that the diameter of the end will be too large. However, according to this feature configuration, it is possible to prevent the diameter of the exhaust downstream end of the second exhaust pipe member from becoming too large.

Further, in the present invention, the first exhaust pipe member has the single pipe portion and the double pipe portion connected to the single pipe portion on the exhaust upstream side with respect to the single pipe portion. In the pipe portion, it is preferable that a reduced diameter portion having a smaller diameter toward the single pipe portion side is formed at the end portion of the outer pipe of the first exhaust pipe member on the single pipe portion side.

According to this feature configuration, the outside air flows toward the outside air introduction portion along the reduced diameter portion, so that the flow of the outside air introduced into the inside of the exhaust pipe can be smoothed.

Further, in the present invention, the exhaust upstream side end portion of the first exhaust pipe member overlaps the discharge portion that discharges the exhaust of the engine with a radial interval from the outside in the radial direction. A diameter-expanded portion is formed at the upstream end of the exhaust pipe member on the upstream side of the exhaust, and the diameter of the outer pipe of the first exhaust pipe member is enlarged toward the upstream side of the exhaust. It overlaps the diameter portion from the outside in the radial direction at intervals in the radial direction, and the diameter of the outer pipe of the first exhaust pipe member is the diameter of the exhaust upstream side end portion and the exhaust upstream side end portion of the diameter expansion portion. It is preferable that the distance in the direction is narrower than the radial distance between the upstream end of the exhaust and the downstream end of the enlarged diameter portion of the outer pipe of the first exhaust pipe member.

According to this feature configuration, the outside air introduction portion for introducing the outside air into the inside of the exhaust pipe is formed by the gap between the exhaust upstream side end portion of the first exhaust pipe member and the exhaust portion. As a result, the temperature of the exhaust gas in the exhaust pipe can be reduced. Then, the outside air flows toward the inside of the exhaust pipe along the enlarged diameter portion, so that the flow of the outside air introduced into the inside of the exhaust pipe can be smoothed. Further, while ensuring a gap between the exhaust upstream side end and the diameter-expanded portion of the outer pipe of the first exhaust pipe member, the diameter of the exhaust upstream side end of the outer pipe of the first exhaust pipe member. Is prevented from increasing along the enlarged diameter part. Thereby, it is possible to prevent the diameter of the exhaust upstream side end portion of the outer pipe of the first exhaust pipe member from becoming too large.

Further, in the present invention, it is preferable that the exhaust upstream side end portion of the outer pipe of the first exhaust pipe member is connected to the exhaust upstream side end portion of the enlarged diameter portion.

According to this feature configuration, the diameter of the exhaust upstream side end portion of the outer pipe of the first exhaust pipe member can be suppressed to be equal to the diameter of the exhaust upstream side end portion of the enlarged diameter portion.

Further, in the present invention, a threshing device for threshing the harvested grain sill and a grain storage unit provided side by side with the threshing device to store the grains after the threshing treatment are provided, and the exhaust pipe is provided with the above-mentioned exhaust pipe. It is preferable that the threshing device and the grain storage portion pass between the threshing device and extend rearward from the engine.

According to this feature configuration, the exhaust pipe can be arranged by utilizing the space between the threshing device and the grain storage portion.

Further, in the present invention, the first exhaust pipe member includes a first oblique portion that extends obliquely rearward and upward from the engine, and a first diagonal portion that extends horizontally rearward from the rear end portion of the first oblique portion. The second exhaust pipe member has a horizontal portion, the second horizontal portion extends horizontally from the rear end portion of the first horizontal portion toward the rear, and the second horizontal portion extends rearward from the rear end portion of the second horizontal portion. It is preferable to have a second diagonal portion extending diagonally upward.

According to this feature configuration, the exhaust pipe can be passed at a position as high as possible so that dust (straw debris, etc.) existing in the vicinity of the field does not adhere to the exhaust pipe. Further, since the exhaust gas is discharged toward the rear upper side along the second diagonal portion, the influence of the exhaust gas at the rear of the machine body can be reduced.

Further, in the present invention, it is preferable that the first oblique portion, the first horizontal portion and the second horizontal portion are each supported by separate support members.

According to this feature configuration, the exhaust pipe can be supported in a well-balanced weight state.

Further, in the present invention, it is preferable that the support member is attached to a double pipe portion in each of the first oblique portion, the first horizontal portion and the second horizontal portion.

According to this feature configuration, it is possible to strengthen the attachment of the support member to each of the first diagonal portion, the first horizontal portion, and the second horizontal portion.

Further, in the present invention, a deck is provided above the exhaust pipe between the grain removing device and the grain storage portion, and the deck is the front deck portion constituting the front portion of the deck and the deck portion described above. It has a rear deck portion that constitutes a rear portion of the deck, and the front deck portion and the rear deck portion are arranged at intervals in the front-rear direction, and the exhaust downstream of the first exhaust pipe member. The connection portion between the side end portion and the exhaust upstream side end portion of the second exhaust pipe member is located at a position shifted to one front and rear side with respect to the gap between the front deck portion and the rear deck portion. It is preferable to have it.

According to this feature configuration, even if dust (straw dust, etc.) enters the gap between the front deck portion and the rear deck portion, the dust enters the exhaust downstream end of the first exhaust pipe member and the second exhaust pipe. It is difficult to enter the inside of the exhaust pipe from the connection part with the exhaust upstream side end of the member.

Further, in the present invention, a vertical transport device for transporting the threshed grains upward toward the grain storage portion is provided on the lateral portion of the threshing device on the grain storage portion side, and the front side thereof. In the deck portion and the rear deck portion, the front deck portion is located on the front side with respect to the vertical transport device, and the rear deck portion is located on the rear side with respect to the vertical transport device. Arranged at intervals in the front-rear direction, the connection portion between the exhaust downstream end of the first exhaust pipe member and the exhaust upstream end of the second exhaust pipe member is formed between the front deck and the rear deck. It is preferable that the position is displaced from the gap between the parts and the vertical transport device to one side in the front-rear direction.

According to this feature configuration, the front deck portion and the rear deck portion can be arranged so as not to interfere with the vertical transfer device. Further, even if dust (straw dust, etc.) enters the gap between the front deck portion, the rear deck portion, and the vertical transport device, the dust enters the exhaust downstream end of the first exhaust pipe member and the second exhaust pipe member. It is difficult to enter the inside of the exhaust pipe from the connection part with the exhaust upstream side end.

It is a right side view which shows a combine. It is a top view which shows a combine. It is a right side view which shows a threshing apparatus and an exhaust pipe. It is a top view which shows the threshing apparatus, the grain tank and the exhaust pipe. It is a right side sectional view showing an exhaust pipe and a deck. It is a right side sectional view which shows the connection part of a tail pipe and a first exhaust pipe member. It is a right side sectional view which shows the connection part of the 1st exhaust pipe member and the 2nd exhaust pipe member.

A mode for carrying out the present invention will be described with reference to the drawings. In the following description, the direction of arrow F is "front of the aircraft", the direction of arrow B is "rear of the aircraft", the direction of arrow L is "left of the aircraft", and the direction of arrow R is "right of the aircraft". One ".

[Overall composition of combine harvester]
1 and 2 show a full-culm harvester (corresponding to the "harvester" according to the present invention). The combine is provided with a traveling machine body 1. The traveling machine body 1 is provided with a body frame 2 and a crawler traveling device 3. A cutting section 4 for cutting planted culms is provided in front of the traveling machine 1. The cutting unit 4 is provided with a scraping reel 5 for scraping the planted culm, a cutting blade 6 for cutting the planted culm, and a scraping auger 7 for scraping the harvested culm.

A threshing device 8 for threshing all the culms of the harvested culms is provided. A feeder 9 for transporting the harvested culm toward the threshing device 8 is provided across the cutting section 4 and the threshing device 8. On the right side of the threshing device 8, a grain tank 10 (corresponding to the “grain storage section” according to the present invention) for storing grains after the threshing process is provided side by side with the threshing device 8. A grain discharge device 11 for discharging grains in the grain tank 10 is provided.

An operating cabin 12 is provided in front of the grain tank 10. The driving cabin 12 is provided with a driving unit 13 on which the driver is boarding and a cabin unit 14 covering the driving unit 13. A driving unit 15 is provided below the driving unit 13.

[Moving part]
As shown in FIGS. 3 and 4, the driving unit 15 is provided with an engine E and an exhaust purification device 16 that purifies the exhaust gas of the engine E by a DPF (Diesel Particulate Filter). The exhaust purification device 16 is provided with a main body portion 16A having the DPF and a tail pipe 16B (corresponding to the “exhaust portion” according to the present invention) for discharging the exhaust gas after the exhaust treatment. The exhaust gas purification device 16 is arranged above the engine E in a posture in which the longitudinal direction of the main body 16A is along the front-rear direction. The tail tube 16B extends rearward from the rear portion of the main body portion 16A. An exhaust pipe 17 is provided through which the exhaust gas after the exhaust gas treatment by the exhaust gas purification device 16 flows.

[Threshing device]
A handling cylinder 18 is provided on the upper part of the threshing device 8. A sorting unit 19 for sorting the threshed product is provided below the threshing device 8. The sorting unit 19 includes a swing sorting device 20 that swings and sorts the threshed product, a wall insert (not shown) that blows sorting air to the threshed product, and the first grain (single grain, etc.). ) Is provided, and a second collection unit 22 for collecting second grain (grains with branch stems, etc.) is provided. On the horizontal side (right side) of the threshing device 8 on the grain tank 10 side, a vertical transport device 23 for transporting the first grain upward toward the grain tank 10 and a second grain. A second reduction device 24 is provided to reduce the amount of water to the swing sorting device 20. The upper portion of the vertical transport device 23 is supported by the right side portion of the threshing device 8 via the connecting portion 23a.

〔deck〕
A deck 25 is provided above the exhaust pipe 17 between the threshing device 8 and the grain tank 10. The deck 25 is supported on the right side of the threshing device 8. The deck 25 includes a front deck portion 26 which constitutes a front side portion of the deck 25, and a rear deck portion 27 which constitutes a rear side portion of the deck 25. The front deck portion 26 and the rear deck portion 27 are in a state in which the front deck portion 26 is located on the front side with respect to the vertical transport device 23 and the rear deck portion 27 is located on the rear side with respect to the vertical transport device 23. And they are arranged at intervals in the front-back direction. The connecting portion 23a is arranged in the gap between the front deck portion 26 and the rear deck portion 27. At the rear end of the rear deck portion 27, an inclined portion 27a that is inclined along the inclination of the rear end portion (second oblique portion 30B described later) of the exhaust pipe 17 is formed in a side view.

An exhaust pipe cover 28 that covers the exhaust pipe 17 from the right side is provided below the deck 25. The exhaust pipe cover 28 is supported by the deck 25 in a state of hanging from the deck 25. The exhaust pipe cover 28 is located from a position in front of the front end of a horizontally (horizontally or substantially horizontal) portion of the exhaust pipe 17 (first horizontal portion 29B described later) to a position rearward of the rear end of the exhaust pipe 17. Extends to.

〔Exhaust pipe〕
As shown in FIGS. 3 to 5, the exhaust pipe 17 passes between the threshing device 8 and the grain tank 10 and extends rearward from the exhaust purification device 16. Since the wind from the front flows between the threshing device 8 and the grain tank 10, the exhaust pipe 17 can be cooled by the wind. The exhaust pipe 17 extends from a position corresponding to the front part of the threshing device 8 to a position corresponding to the rear part of the threshing device 8 and is located below the upper ends of the threshing device 8 and the grain tank 10. ing. The rear end of the exhaust pipe 17 does not protrude to the rear side of the rear end of the grain tank 10. The exhaust pipe 17 is configured to be divided into two in the exhaust flow direction. That is, the exhaust pipe 17 includes a first exhaust pipe member 29 that constitutes an exhaust upstream side (front side) portion of the exhaust pipe 17, and a second exhaust that constitutes an exhaust downstream side (rear side) portion of the exhaust pipe 17. A pipe member 30 is provided. The connection portion C between the rear end portion of the first exhaust pipe member 29 and the front end portion of the second exhaust pipe member 30 is provided in the gap between the front deck portion 26 and the rear deck portion 27, the connecting portion 23a, and the vertical transport device 23. On the other hand, it is located at a position shifted to the rear side.

As shown in FIGS. 3 to 7, the first exhaust pipe member 29 includes a first inner pipe 31 (corresponding to the “inner pipe” according to the present invention) and a first outer pipe 32 (“outer pipe” according to the present invention). It is composed of a double pipe member having (corresponding to). The first inner tube 31 and the first outer tube 32 are composed of tubular members having a circular (perfect circular or substantially perfect circular) cross-sectional shape. The first outer pipe 32 overlaps the first inner pipe 31 at intervals in the radial direction from the outer side in the radial direction. An air layer is formed between the first inner pipe 31 and the first outer pipe 32. The first exhaust pipe member 29 is provided with a single pipe portion and a double pipe portion connected to the single pipe portion on the front side with respect to the single pipe portion. The first exhaust pipe member 29 has a first oblique portion 29A extending diagonally from the exhaust purification device 16 upward and rearward, and a first oblique portion 29A horizontally (horizontally or substantially horizontal) from the rear end portion to the rear. A first horizontal portion 29B, which extends to, is provided.

The first oblique portion 29A extends obliquely from the exhaust gas purification device 16 toward the left rear in a plan view. The front end of the first oblique portion 29A enters the front of the grain tank 10 on the right side of the left end of the grain tank 10. The front end portion of the first oblique portion 29A overlaps the tail tube 16B with a radial interval from the outside in the radial direction. The gap between the front end portion of the first oblique portion 29A and the tail pipe 16B constitutes an outside air introduction portion 17a that introduces outside air into the inside of the exhaust pipe 17.

A diameter-expanded portion 31a having a larger diameter toward the front side is formed at the front end portion of the first inner pipe 31. The front end portion of the first outer pipe 32 overlaps the diameter-expanded portion 31a with a radial interval from the outside in the radial direction, and is connected to the front end portion of the diameter-expanded portion 31a. The front end portion of the enlarged diameter portion 31a projects to the front side of the front end portion of the first outer pipe 32. The radial distance D between the front end portion of the first outer pipe 32 and the enlarged diameter portion 31a is narrower toward the front side. That is, the radial distance D (distance at the position P1 in FIG. 6) between the front end portion of the first outer pipe 32 and the front end portion of the diameter-expanded portion 31a is the front end portion of the first outer pipe 32 and the diameter-expanded portion 31a. It is narrower than the radial distance D from the rear end (distance at position P2 in FIG. 6). The front end portion of the first outer pipe 32 is in contact with the outer peripheral surface of the enlarged diameter portion 31a over the entire circumference.

The first horizontal portion 29B extends straight (straight or substantially straight) from the rear end portion of the first oblique portion 29A in a plan view toward the rear. The rear end portion of the first inner pipe 31 projects to the rear side of the rear end portion of the first outer pipe 32. That is, the rear end portion of the first horizontal portion 29B is composed of a single pipe portion. A reduced diameter portion 32a having a smaller diameter toward the rear side is formed at the rear end portion of the first outer pipe 32. That is, in the double pipe portion, a reduced diameter portion 32a having a diameter smaller toward the single pipe portion side is formed at the end portion of the first outer pipe 32 on the single pipe portion side. The rear end portion of the reduced diameter portion 32a is in contact with the outer peripheral surface of the first inner pipe 31 over the entire circumference.

As shown in FIGS. 3 to 7, the second exhaust pipe member 30 is composed of a double pipe member having a second inner pipe 33 and a second outer pipe 34. The second inner pipe 33 and the second outer pipe 34 are composed of tubular members having a circular (perfect circular or substantially perfect circular) cross-sectional shape. The second outer pipe 34 overlaps the second inner pipe 33 with a radial interval from the outer side in the radial direction. An air layer is formed between the second inner pipe 33 and the second outer pipe 34. The second exhaust pipe member 30 includes a second horizontal portion 30A extending horizontally (horizontally or substantially horizontally) from the rear end portion of the first horizontal portion 29B toward the rear, and a rear end portion of the second horizontal portion 30A to the rear. A second diagonal portion 30B extending diagonally upward is provided.

The second horizontal portion 30A extends straight (straight or substantially straight) from the rear end portion of the first horizontal portion 29B toward the rear in a plan view. The front end portion of the second horizontal portion 30A overlaps the rear end portion of the first inner pipe 31 with a radial interval from the outside in the radial direction. That is, the front end portion of the second exhaust pipe member 30 overlaps the rear end portion of the first exhaust pipe member 29 with a radial interval from the outside in the radial direction. The gap between the front end portion of the second horizontal portion 30A and the rear end portion of the first inner pipe 31 constitutes an outside air introduction portion 17b that introduces outside air into the inside of the exhaust pipe 17.

A front reduced diameter portion 34a having a smaller diameter toward the front side is formed at the front end portion of the second outer pipe 34. The front end portion of the second inner pipe 33 projects to the front side of the front end portion of the second outer pipe 34. The front end portion of the front reduced diameter portion 34a is in contact with the outer peripheral surface of the second inner pipe 33 over the entire circumference.

The second diagonal portion 30B extends diagonally from the rear end portion of the second horizontal portion 30A toward the rear right in a plan view. At the rear end of the second outer pipe 34, a rear-diameter portion 34b having a smaller diameter toward the rear side is formed. The rear end portion of the second inner pipe 33 projects to the rear side of the rear end portion of the second outer pipe 34. The rear end portion of the rear reduced diameter portion 34b is in contact with the outer peripheral surface of the second inner pipe 33 over the entire circumference.

[Exhaust pipe support structure]
A first support member 35 that supports the first diagonal portion 29A, a second support member 36 that supports the first horizontal portion 29B, and front and rear third support members 37 that support the second horizontal portion 30A are provided. That is, the first diagonal portion 29A, the first horizontal portion 29B, and the second horizontal portion 30A are each supported by separate support members (first support member 35, second support member 36, and third support member 37). .. The first support member 35, the second support member 36, and the third support member 37 correspond to the "support member" according to the present invention.

The first support member 35 is attached to the double pipe portion in the first diagonal portion 29A. The first support member 35 is attached to a support column 38 erected on the machine frame 2. The first oblique portion 29A is supported by the support column 38 via the first support member 35.

The second support member 36 is attached to the double pipe portion in the first horizontal portion 29B. The second support member 36 is attached to the front portion of the connecting portion 23a. The first horizontal portion 29B is supported by the connecting portion 23a via the second support member 36.

The third support member 37 is attached to the double pipe portion in the second horizontal portion 30A. The third support member 37 is attached to the vertical frame 39 on the right side of the threshing device 8. The second horizontal portion 30A is supported on the right side portion of the threshing device 8 via the third support member 37.

[Another Embodiment]
(1) In the above embodiment, the exhaust pipe 17 is configured to be divided into two in the exhaust flow direction. However, the exhaust pipe 17 may be divided into three or more in the exhaust flow direction. For example, the exhaust pipe 17 may be provided with a first exhaust pipe member 29, a second exhaust pipe member 30, and a third exhaust pipe member in this order from the exhaust upstream side. In this case, the third exhaust pipe member may be composed of a double pipe member or a single pipe member.

(2) In the above embodiment, the rear end portion of the first horizontal portion 29B is composed of a single pipe portion. However, the rear end portion of the first horizontal portion 29B may be composed of a double pipe portion.

(3) In the above embodiment, the reduced diameter portion 32a is formed at the rear end portion of the first outer pipe 32. However, the reduced diameter portion 32a may not be formed at the rear end portion of the first outer pipe 32.

(4) In the above embodiment, the enlarged diameter portion 31a is formed at the front end portion of the first inner pipe 31. However, the enlarged diameter portion 31a may not be formed at the front end portion of the first inner pipe 31.

(5) In the above embodiment, the first exhaust pipe member 29 extends obliquely from the engine E toward the rear and upper direction. However, the first exhaust pipe member 29 may extend vertically upward from the engine E, may extend vertically downward from the engine E, or may extend rearward from the engine E. It may extend diagonally downward.

(6) In the above embodiment, the exhaust pipe 17 is passed between the threshing device 8 and the grain tank 10. However, the exhaust pipe 17 may be passed through a place different from that between the threshing device 8 and the grain tank 10.

(7) In the above embodiment, the first exhaust pipe member 29 is provided with a first diagonal portion 29A and a first horizontal portion 29B. However, the configuration of the first exhaust pipe member 29 is not limited to the configuration according to the above embodiment.

(8) In the above embodiment, the second exhaust pipe member 30 is provided with a second horizontal portion 30A and a second diagonal portion 30B. However, the configuration of the second exhaust pipe member 30 is not limited to the configuration according to the above embodiment.

(9) In the above embodiment, the first support member 35, the second support member 36, and the third support member 37 are provided as the support structure of the exhaust pipe 17. However, the support structure of the exhaust pipe 17 is not limited to the configuration according to the above embodiment.

(10) In the above embodiment, the connection portion C between the rear end portion of the first exhaust pipe member 29 and the front end portion of the second exhaust pipe member 30 is the gap between the front deck portion 26 and the rear deck portion 27. It is located at a position shifted to the rear side with respect to the vertical transfer device 23. However, the connection portion C between the rear end portion of the first exhaust pipe member 29 and the front end portion of the second exhaust pipe member 30 is provided with respect to the gap between the front deck portion 26 and the rear deck portion 27 and the vertical transport device 23. It may be located at a position shifted to the front side.

(11) In the above embodiment, the driving unit 15 is provided with a DPF type exhaust purification device 16. However, the driving unit 15 may be provided with a muffler (silencer) instead of the DPF type exhaust purification device 16. Alternatively, the driving unit 15 may be provided with an SCR (Selective Catalytic Reduction) type exhaust purification device in addition to the DPF type exhaust purification device 16.

(12) In the above embodiment, the "grain storage portion" according to the present invention is composed of a grain tank 10. However, the "grain storage portion" according to the present invention may be composed of a bag-packing type hopper.

The present invention can be used for a head-feeding combine, a head-feeding combine, and a corn harvester.

8 Threshing device 10 Grain tank (grain storage)
16B tail pipe (exhaust part)
17 Exhaust pipe 23 Vertical transport device 25 Deck 26 Front deck part 27 Rear deck part 29 First exhaust pipe member 29A First diagonal part 29B First horizontal part 30 Second exhaust pipe member 30A Second horizontal part 30B Second diagonal part 31 First inner pipe (inner pipe)
31a Diameter expansion part 32 First outer pipe (outer pipe)
32a Diameter reduction part 35 First support member (support member)
36 Second support member (support member)
37 Third support member (support member)
C connection E engine

Claims (11)

With the engine
An exhaust pipe through which the exhaust of the engine flows is provided.
The exhaust pipe has a first exhaust pipe member that constitutes an exhaust upstream side portion of the exhaust pipe, and a second exhaust pipe member that constitutes an exhaust downstream side portion of the exhaust pipe.
The first exhaust pipe member and the second exhaust pipe member are harvesters composed of double pipe members. The exhaust downstream end of the first exhaust pipe member is composed of a single pipe portion.
The harvest according to claim 1, wherein the exhaust upstream side end portion of the second exhaust pipe member overlaps the exhaust downstream side end portion of the first exhaust pipe member with a radial interval from the outer side in the radial direction. Machine. The first exhaust pipe member includes the single pipe portion and a double pipe portion connected to the single pipe portion on the exhaust upstream side with respect to the single pipe portion.
According to claim 2, in the double pipe portion, a reduced diameter portion having a diameter smaller toward the single pipe portion side is formed at an end portion of the outer pipe of the first exhaust pipe member on the single pipe portion side. The harvester described. The exhaust upstream side end portion of the first exhaust pipe member overlaps the exhaust portion that discharges the exhaust gas of the engine with a radial interval from the outside in the radial direction.
At the end of the inner pipe of the first exhaust pipe member on the upstream side of the exhaust, an enlarged diameter portion having a larger diameter toward the upstream side of the exhaust is formed.
Of the outer pipes of the first exhaust pipe member, the end portion on the upstream side of the exhaust is overlapped with the enlarged diameter portion at intervals in the radial direction from the outside in the radial direction.
The radial distance between the exhaust upstream side end of the outer pipe of the first exhaust pipe member and the exhaust upstream side end of the enlarged diameter portion is the exhaust upstream side end of the outer pipe of the first exhaust pipe member. The harvester according to any one of claims 1 to 3, which is narrower than the radial distance between the portion and the exhaust downstream end portion of the enlarged diameter portion. The harvester according to claim 4, wherein the exhaust upstream side end portion of the outer pipe of the first exhaust pipe member is connected to the exhaust upstream side end portion of the enlarged diameter portion. A threshing device that threshes the harvested culm,
A grain storage unit provided side by side with the threshing device and stores grains after the threshing process is provided.
The harvester according to any one of claims 1 to 5, wherein the exhaust pipe is passed between the threshing device and the grain storage unit and extends rearward from the engine. The first exhaust pipe member includes a first diagonal portion extending obliquely rearward and upward from the engine, and a first horizontal portion extending horizontally rearward from the rear end portion of the first diagonal portion. And
The second exhaust pipe member has a second horizontal portion that extends horizontally from the rear end portion of the first horizontal portion toward the rear, and a second horizontal portion that extends diagonally from the rear end portion of the second horizontal portion toward the rear upper side. The harvester according to claim 6, which has two diagonal portions. The harvester according to claim 7, wherein the first oblique portion, the first horizontal portion, and the second horizontal portion are each supported by separate support members. The harvester according to claim 8, wherein the support member is attached to a double pipe portion in each of the first diagonal portion, the first horizontal portion, and the second horizontal portion. A deck is provided above the exhaust pipe between the threshing device and the grain storage.
The deck has a front deck portion that constitutes a front side portion of the deck and a rear deck portion that constitutes a rear side portion of the deck.
The front deck portion and the rear deck portion are arranged at intervals in the front-rear direction.
The connection portion between the exhaust downstream end of the first exhaust pipe member and the exhaust upstream end of the second exhaust pipe member is one side of the front and rear with respect to the gap between the front deck portion and the rear deck portion. The harvester according to any one of claims 6 to 9, which is located at a position displaced from the above. A vertical transport device for transporting the threshed grains upward toward the grain storage portion is provided on the lateral portion of the threshing device on the grain storage portion side.
The front deck portion and the rear deck portion are in a state in which the front deck portion is located on the front side with respect to the vertical transport device and the rear deck portion is located on the rear side with respect to the vertical transport device. So, they are arranged at intervals in the front-back direction,
The connection portion between the exhaust downstream side end portion of the first exhaust pipe member and the exhaust upstream side end portion of the second exhaust pipe member is provided in the gap between the front deck portion and the rear deck portion and in the vertical transport device. The harvester according to claim 10, which is located at a position shifted to one side in the front-rear direction.

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