KR102018390B1 - Combine - Google Patents

Abstract

An object of the present invention is to provide a combine that can sufficiently reduce the exhaust temperature.
From the driving part provided in the front part of a traveling body, the threshing apparatus 6 and the grain tank 7 provided in the gas left-right direction at the back of a driving part, the engine 4 provided below the driving part, and the engine 4, And an exhaust pipe 9 for discharging the exhaust gas to the outside, and the exhaust pipe 9 passes between the threshing apparatus 6 and the grain tank 7 from the engine 4 to at least the upper end of the threshing apparatus 6. An exhaust pipe main body 10 that extends, and an extension part 11 attached to an exhaust downstream side end of the exhaust pipe main body 10, and are disposed outside the exhaust pipe 9 between the exhaust pipe main body 10 and the extension part 11. And a gap 22 communicating with the inside of the exhaust pipe 9 is formed.

Description

Combine {COMBINE}

The present invention relates to a combine. In more detail, it is related with the combiner provided with the exhaust pipe which discharges exhaust from an engine to outside air.

Conventionally, the combine as mentioned above is known. For example, Patent Document 1 discloses a combine exhaust structure having an exhaust pipe for discharging exhaust from an engine to the outside air. This exhaust pipe passes between the threshing apparatus and the recovery part (grain tank). The exhaust pipe includes a first pipe part and a second pipe part. Among these, the 1st pipe | tube part is attached to the engine muffler. Moreover, the 2nd pipe part is attached to the exhaust downstream side edge part of a 1st pipe part. And the gap which communicates the exterior of an exhaust pipe and the inside of an exhaust pipe is formed in the connection part of an engine muffler and a 1st pipe part, and the connection part of a 1st pipe part and a 2nd pipe part, respectively. In this way, the exhaust temperature is reduced by introducing outside air into the exhaust pipe from each of the gap between the engine muffler and the first pipe part and the gap between the first pipe part and the second pipe part.

Japanese Patent Application Publication No. 2012-60955

However, in the combine of patent document 1, since the clearance gap between an engine muffler and a 1st pipe | tube part, and the clearance gap between a 1st pipe | tube part and a 2nd pipe | tube part is located between a threshing apparatus and a grain tank, it is threshing to the outside air introduced from these clearances. It is easy to include heat that remains between the device and the grain tank. Therefore, even if the outside air was introduced from the gap between the engine muffler and the first pipe part and the gap between the first pipe part and the second pipe part, the exhaust temperature could not be sufficiently reduced. And when exhaust is exhausted backward from an exhaust pipe, since exhaust temperature is not fully reduced, the worker who works behind a combine may give unpleasant feelings by exhaust, or the surrounding member may press.

This invention is made | formed in view of the above situations, and an object of this invention is to provide the combine which can fully reduce exhaust temperature.

Features of the present invention include a driving unit provided in the front portion of the traveling body, a threshing apparatus and a grain tank arranged in a horizontal direction in the rear of the driving unit, an engine provided below the driving unit, and exhaust from the engine. And an exhaust pipe for discharging to the outside air, wherein the exhaust pipe is attached to an exhaust pipe main body extending from the engine to at least an upper end of the threshing device between the threshing device and the grain tank, and an exhaust downstream end of the exhaust pipe main body. An extension downstream portion of the exhaust pipe body in a state in which the diameter thereof is larger than the diameter of the exhaust pipe body, and the exhaust downstream side end of the exhaust pipe body is inserted into the exhaust upstream end of the extension part. It is mounted on, between the exhaust pipe main body and the extension, the outside of the exhaust pipe and the exhaust pipe A gap is formed between the outer circumferential surface of the exhaust pipe main body and the inner circumferential surface of the extension part at an overlapping and overlapping position of the exhaust downstream side end of the exhaust pipe main body and the exhaust upstream end of the extension part. And a member for connecting the extension part are not provided, and a plurality of stays connecting the exhaust pipe main body and the extension part at intervals in the circumferential direction of the exhaust pipe main body on an end face of the exhaust downstream side of the exhaust pipe main body are provided. It is fixed and the inner peripheral surface of the said extension part is being fixed to the said stay.

According to this characteristic structure, the clearance gap between an exhaust pipe main body and an extension part is located in the exhaust downstream end part of the exhaust pipe main body extended to the upper end part of a threshing apparatus. For this reason, relatively low-temperature outdoor air in the vicinity of the upper end of the threshing apparatus can be introduced from the gap between the exhaust pipe main body and the extension part. Therefore, the exhaust temperature can be sufficiently reduced. And even if the exhaust gas is discharged backward from the exhaust pipe, since the exhaust temperature is sufficiently reduced, the worker working behind the combine does not cause discomfort caused by the exhaust gas or the surrounding members are pressed.

Moreover, if the cross-sectional shape of the said exhaust pipe main body is circular, and the cross-sectional shape of the said extension part is polygonal, this invention is suitable.

According to this characteristic structure, when the cross-sectional shape of an extension part is made into a polygon, the cross-sectional area of an extension part becomes larger than the case where the cross-sectional shape of the extension part is made circular inscribed to the said polygon. As a result, the difference between the cross-sectional area of the exhaust pipe main body and the cross-sectional area of the extension part becomes large, so that the gap between the exhaust pipe main body and the extension part becomes large. For this reason, much outside air can be introduce | transduced from the clearance gap between an exhaust pipe main body and an extension part. Therefore, the exhaust temperature can be sufficiently reduced. Moreover, when the cross-sectional shape of an extension part is made into a polygon, the magnitude | size of the extension part becomes smaller than the case where the cross-sectional shape of the extension part is made into the circle which circumscribes the said polygon. Therefore, the extension can be configured compactly.

Moreover, this invention is suitable if the wind direction plate which sets the wind direction of the exhaust discharged | emitted from the said exhaust pipe is attached to the exhaust downstream end part of the said extension part.

According to this characteristic structure, the wind direction of the exhaust discharged | emitted from an exhaust pipe can be set to the wind direction board so that exhaust gas discharged from an exhaust pipe may not be caught by the surrounding member. Therefore, even if the exhaust gas is discharged from the exhaust pipe, the surrounding members are not pressed.

Moreover, this invention is suitable if the said wind direction plate is attached to the outer peripheral surface of the said extension part so that there may be no gap between the outer peripheral surfaces of the said extension part.

According to this characteristic configuration, when there is a gap between the wind direction plate and the outer circumferential surface of the extension part, air flows through the gap so that the flow of exhaust gas discharged from the exhaust pipe tends to be disturbed, but there is no gap between the wind direction plate and the outer circumferential surface of the extension part. Therefore, since air does not flow between the wind direction plate and the outer peripheral surface of the extension part, the flow of the exhaust gas discharged from the exhaust pipe is less likely to be disturbed. Therefore, the wind direction of the exhaust gas set by the wind direction plate does not change unpredictably.

Moreover, this invention is suitable as long as the said wind direction plate inclines with respect to the axial direction of the said extension part so that the exhaust downstream side is closer to the central axis.

According to this characteristic configuration, the exhaust gas discharged from the exhaust pipe collides with the wind direction plate and flows obliquely with respect to the central axis of the extension along the inclination of the wind direction plate, thereby changing the wind direction of the exhaust gas discharged from the exhaust pipe. Therefore, the controllability of the wind direction is improved.

Moreover, this invention is suitable as long as the exhaust downstream side edge part of the said wind direction plate is extended to the center axis of the said extension part.

According to this characteristic configuration, the exhaust gas discharged from the exhaust pipe collides with the wind direction plate and flows at an angle with respect to the central axis of the extension portion along the inclination of the wind direction plate, whereby the wind direction of the exhaust gas discharged from the exhaust pipe is changed, and at least the extension portion It is guided reliably to the vicinity of the central axis. Therefore, even if the exhaust gas is discharged from the exhaust pipe, the controllability of the wind direction is further improved while the exhaust gas is exhausted from the exhaust pipe.

Moreover, this invention is suitable if the said wind direction plate is provided to the outer peripheral surface of the said extension part, and is provided with the wind direction change mechanism which can change the position of the circumferential direction of the said extension part with respect to the said exhaust pipe main body.

According to this characteristic structure, since the wind direction plate is fixed to the outer peripheral surface of the extension part, the wind direction of the exhaust discharged from the exhaust pipe can be easily changed only by changing the position of the extension part in the circumferential direction with respect to the exhaust pipe main body by the wind direction change mechanism.

Moreover, this invention is suitable if the cross-sectional shape of the said extension part is hexagonal.

According to this characteristic structure, an extension part can be comprised compactly, enlarging the clearance gap between an exhaust pipe main body and an extension part.

Moreover, this invention is suitable if the diameter of the said extension part is larger than the diameter of the said exhaust pipe main body.

Moreover, this invention is suitable as long as the said exhaust pipe is extended toward the gas rear upper direction from the said engine.

Moreover, this invention is suitable as long as the said exhaust pipe is extended to the gas rear part.

Moreover, this invention is suitable as long as the said extension part is arrange | positioned behind the rear end part of the said threshing apparatus or the rear end part of the said grain tank.

Moreover, this invention is suitable as long as the said clearance gap is formed between the outer peripheral surface of the said exhaust pipe main body, and the inner peripheral surface of the said extension part.

The present invention further provides the exhaust pipe main body including a first exhaust pipe on the engine side and a second exhaust pipe attached to an exhaust downstream end of the first exhaust pipe, and an outer circumferential surface of the first exhaust pipe and the second exhaust pipe. It is suitable that a gap is formed between the inner circumferential surfaces of the inner surface of the exhaust pipe to communicate with the outside of the exhaust pipe.

Moreover, this invention is suitable for the said exhaust pipe as long as the inclination angle of the said 1st exhaust pipe and the inclination angle of the said 2nd exhaust pipe are different from a side view.

Moreover, if the inclination angle of a said 1st exhaust pipe is larger than the inclination angle of a said 2nd exhaust pipe, this invention is suitable.

Moreover, this invention is suitable as long as the said 1st exhaust pipe is extended to the upper end part of the said threshing apparatus.

Moreover, this invention is suitable if the diameter of the said extension part is larger than the diameter of the said 2nd exhaust pipe.

Moreover, if the diameter of a said 2nd exhaust pipe is larger than the diameter of a said 1st exhaust pipe, this invention is suitable.

In addition, the present invention, the engine is provided with a discharge portion for discharging the exhaust, the exhaust pipe is equipped with the exhaust portion, between the outer peripheral surface of the discharge portion and the inner peripheral surface of the exhaust pipe, the outside of the exhaust pipe and the exhaust pipe It is suitable if the gap which communicates inside is formed.

Moreover, this invention is suitable as long as the part located in at least one of the upper side and the lower side than the said exhaust pipe on the side surface of the said threshing apparatus side of the said grain tank is expanded to the side of the said threshing apparatus.

1 is a side view showing a combine.
2 is a plan view of the combine;
3 is a side view showing the exhaust pipe;
4 is an exploded perspective view showing an exhaust pipe;
5 is a side sectional view showing a first exhaust pipe;
FIG. 6 is a cross sectional view at a VI-VI position in FIG. 5; FIG.
7 is a front sectional view showing a grain tank.
Fig. 8 is a side sectional view showing the extension portion and the wind direction plate.
FIG. 9 is a sectional view of the IX-IX position in FIG. 8; FIG.
10 is a cross-sectional view at the XX position in FIG. 8.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated based on drawing.

First, the whole structure of a combine is demonstrated by FIG. 1 and FIG.

As shown to FIG. 1 and FIG. 2, the combine is equipped with the crawler-type traveling body 1. As shown in FIG. The harvesting | reaping part 2 is provided in front of this traveling body 1. And the driving part 3 is provided in the front part of the traveling body 1. The engine 4 is provided below this driving part 3. This engine 4 is provided with the muffler 5. This muffler 5 has the tail pipe 5a which is a "discharge part" which discharges exhaust. The tail pipe 5a is equipped with an exhaust pipe 9 for discharging exhaust gas from the engine 4 to the outside air. Moreover, the threshing apparatus 6 and the grain tank 7 are arranged in the gas left-right direction at the back of the driving part 3. The discharge straw processing part 8 is provided in the rear part of this threshing apparatus 6.

Next, the exhaust pipe 9 will be described with reference to FIGS. 3 to 10.

As shown in FIG. 3 and FIG. 4, the exhaust pipe 9 extends from the engine 4 to the gas rearward portion upward from the engine 4. Specifically, the exhaust pipe 9 extends rearward from the rear end of the threshing apparatus 6 and the rear end of the grain tank 7. The exhaust pipe 9 includes an exhaust pipe main body 10, an extension 11, and a wind direction changing mechanism 21.

The exhaust pipe main body 10 passes between the threshing apparatus 6 and the grain tank 7 (see FIG. 2), and is located above the upper end of the threshing apparatus 6 from the engine 4 (upper end of the threshing apparatus 6). Extends to]. The exhaust pipe main body 10 includes a first exhaust pipe 12 and a second exhaust pipe 13. The cross-sectional shape of these 1st exhaust pipe 12 and the 2nd exhaust pipe 13 is all circular.

In addition, the exhaust pipe main body 10 is inclined upward from the gas rear as viewed from the side. The inclination angle of the first exhaust pipe 12 and the inclination angle of the second exhaust pipe 13 are different from each other in the exhaust pipe main body 10. Specifically, the inclination angle of the first exhaust pipe 12 is larger than the inclination angle of the second exhaust pipe 13. In addition, the inclination angle of the 1st exhaust pipe 12 here means the inclination angle of the part except the exhaust downstream end part (mounting part 12b) of the 1st exhaust pipe 12. As shown in FIG.

The first exhaust pipe 12 is located on the engine 4 side (exhaust upstream side) in the exhaust pipe 9. The first exhaust pipe 12 extends to the upper end of the threshing apparatus 6 (above the upper end of the threshing apparatus 6). In addition, the first exhaust pipe 12 is fixed to the exterior 14 in a state interpolated into the exterior 14.

The exterior 14 is supported by the right side of the threshing apparatus 6 via the support part 16 and the support part 17. FIG. The exterior 14 is covered only by the outer circumferential surface of the grain tank 7 side (right side) by the first cover 15 having a substantially semicircular cross-sectional shape. This 1st cover 15 is a plate-shaped member (what is called a punching metal) in which many round holes were formed.

As shown in FIG. 5 and FIG. 6, the exhaust upstream end of the first exhaust pipe 12 protrudes from the exhaust upstream end of the exterior 14. At the exhaust upstream side end portion of the first exhaust pipe 12, a diameter expansion portion 12a is formed in which the diameter becomes larger as the exhaust upstream side. The diameter D2 of this diameter expansion part 12a is larger than the diameter D1 of the tail pipe 5a of the muffler 5. That is, the diameter expansion part 12a is externally attached to the tail pipe 5a. In other words, the diameter expansion part 12a and the tail pipe 5a overlap in the exhaust flow direction. A gap 18 is formed between the outer circumferential surface of the tail pipe 5a and the inner circumferential surface of the diameter expansion portion 12a so as to communicate the outside of the exhaust pipe 9 and the inside of the exhaust pipe 9. This clearance gap 18 is formed over the perimeter between the outer peripheral surface of the tail pipe 5a and the inner peripheral surface of the diameter expansion part 12a.

Moreover, the exhaust downstream side edge part of the 1st exhaust pipe 12 protrudes from the exhaust downstream side edge part of the exterior 14. At the exhaust downstream end of the first exhaust pipe 12, a mounting portion 12b on which the second exhaust pipe 13 is mounted is formed. This mounting part 12b is inclined at the same angle as the inclination angle of the second exhaust pipe 13 when viewed from the side.

As shown to FIG. 3 and FIG. 4, the 2nd exhaust pipe 13 is attached to the exhaust downstream end part (mounting part 12b) of the 1st exhaust pipe 12. As shown in FIG. And the 2nd exhaust pipe 13 is supported by the right side surface of the threshing apparatus 6 through the support part 25 and the support part 27. As shown in FIG. Moreover, the 2nd exhaust pipe 13 is covered only by the outer peripheral surface of the grain tank 7 side (right side) by the 2nd cover 26 whose cross-sectional shape is substantially semicircle (refer FIG. 9). This second cover 26 is a plate-shaped member (so-called punching metal) in which a plurality of round holes are formed.

As shown in FIG. 5, the diameter D4 of the second exhaust pipe 13 is larger than the diameter D3 of the mounting portion 12b of the first exhaust pipe 12. That is, the exhaust upstream end part of the 2nd exhaust pipe 13 is externally attached to the mounting part 12b. In other words, the exhaust upstream end of the second exhaust pipe 13 and the mounting portion 12b overlap in the exhaust flow direction. A gap 19 is formed between the outer circumferential surface of the mounting portion 12b and the inner circumferential surface of the exhaust upstream end of the second exhaust pipe 13 so as to communicate the outside of the exhaust pipe 9 and the inside of the exhaust pipe 9. The gap 19 is formed over the entire circumference between the outer circumferential surface of the mounting portion 12b and the inner circumferential surface of the exhaust upstream side end portion of the second exhaust pipe 13.

Here, as shown in FIG.3 and FIG.7, the part (1st bulging part) located above the exhaust pipe 9 in the side surface (left side surface) of the side of the threshing apparatus 6 of the grain tank 7 here. ) 7a is expanded to the side (left side) of the threshing apparatus 6. Specifically, in the side surface (left side surface) of the threshing apparatus 6 of the grain tank 7, the 1st bulging part 7a and the 2nd bulging part 7b which are its front side parts are rearwards. It bulges more than the side surface 7c which is a side part. These 1st bulging part 7a and the 2nd bulging part 7b are expanded more than the side surface 7c. And the 1st bulge part 7a is expanded than the 2nd bulge part 7b. Thereby, the capacity of the grain tank 7 can be increased.

Next, the extension part 11 is demonstrated with FIG. 2, FIG. 3, FIG. 8, and FIG.

As shown to FIG. 2 and FIG. 3, the extension part 11 is arrange | positioned behind the rear end part of the threshing apparatus 6 and the rear end part of the grain tank 7. That is, the extension part 11 is arrange | positioned above the discharge straw straw processing part 8, and overlaps with the discharge straw straw processing part 8 in plan view. And the extension part 11 is arrange | positioned on the same axis as the exhaust-pipe main body 10 in plan view.

8 and 10, the extension part 11 is attached to the exhaust downstream side end portion of the second exhaust pipe 13. And the cross-sectional shape of the extension part 11 is polygonal. In this embodiment, the cross-sectional shape of the extension part 11 is hexagon (regular hexagon). In addition, the extension part 11 is comprised so that the 1st half-section 11a and the 2nd half-section 11b may join, and a cross-sectional shape may become a hexagon.

In addition, the diameter D5 and the diameter D6 of the extension portion 11 are larger than the diameter D4 of the second exhaust pipe 13. That is, the extension part 11 is sheathed in the exhaust downstream side edge part of the 2nd exhaust pipe 13. In other words, the extension part 11 and the exhaust downstream side edge part of the 2nd exhaust pipe 13 overlap in the exhaust flow direction. A gap 22 is formed between the outer circumferential surface of the second exhaust pipe 13 and the inner circumferential surface of the extension part 11 so as to communicate the outside of the exhaust pipe 9 and the inside of the exhaust pipe 9. The gap 22 is formed over the entire circumference between the outer circumferential surface of the second exhaust pipe 13 and the inner circumferential surface of the extension portion 11.

Moreover, the extension part 11 is attached to the exhaust downstream side edge part of the 2nd exhaust pipe 13 so that the center axis C may become horizontal. And the extension part 11 is arrange | positioned so that one surface of six surfaces may become a horizontal upper surface. Moreover, the wind direction plate 20 is attached to the exhaust downstream side edge part of the extension part 11.

The wind direction plate 20 sets the wind direction of the exhaust exhausted from the exhaust pipe 9. And the wind direction plate 20 is attached to the outer peripheral surface of the extension part 11 so that there may be no clearance gap with the outer peripheral surface of the extension part 11. Specifically, the wind direction plate 20 is fixed to the outer peripheral surface of the extension part 11 by welding. The wind direction plate 20 includes a wind direction plate main body 20a and a pair of side plates 20b. Moreover, the wind direction plate 20 is integrally formed with the wind direction plate main body 20a and the pair of side plates 20b (refer FIG. 4).

The wind direction plate main body 20a is inclined with respect to the direction of the center axis C of the extension part 11 so that the exhaust downstream side is closer to the center axis C of the extension part 11. And the exhaust downstream side edge part of the wind direction plate main body 20a is extended to the center axis C of the extension part 11. As shown in FIG. That is, the exhaust downstream side edge part of the wind direction plate main body 20a is located on the center axis C of the extension part 11. In addition, the pair of side plates 20b are provided by distributing the wind direction plate main body 20a to both sides (one side and the other side with the central axis C of the extension portion 11 interposed therebetween).

According to the above structure, the exhaust pipe main body 10 and the extension part 11 are exhaust downstream end part of the exhaust pipe main body 10 extended to the upper end part (above the upper end of the threshing device 6) of the threshing apparatus 6. The gap 22 between is located. For this reason, relatively low-temperature outside air in the vicinity of the upper end of the threshing apparatus 6 can be introduced from the gap 22 between the exhaust pipe main body 10 and the extension part 11. Therefore, the exhaust temperature can be sufficiently reduced. And even if the exhaust gas is discharged backward from the exhaust pipe 9, since the exhaust temperature is sufficiently reduced, the operator working behind the combine gives unpleasant sensation due to the exhaust, or the surrounding member (for example, the grain tank 7). Side walls, etc.) are not pressed.

In particular, in this embodiment, in addition to the clearance 22 (gap between the exhaust pipe main body 10 and the extension part 11), the clearance 18 (the outer peripheral surface of the tail pipe 5a and the diameter expansion part 12a) The outside air can also be introduced from the gap between the inner circumferential surface and the gap 19 (the gap between the outer circumferential surface of the mounting portion 12b and the inner circumferential surface of the exhaust upstream side end portion of the second exhaust pipe 13). Therefore, exhaust temperature can be reduced more effectively. In this way, the outside air can be introduced from the gap 22, the gap 18, and the gap 19 by the introduction by the negative pressure generated in the exhaust pipe 9.

The exhaust gas discharged from the exhaust pipe 9 collides with the wind direction plate 20 and flows at an angle with respect to the central axis C of the extension part 11 along the inclination of the wind direction plate 20, thereby exhausting the exhaust pipe 9. The wind direction of the exhaust gas discharged from the gas is changed (upward in the rear of the gas in the case shown in Fig. 8.) Therefore, the controllability of the wind direction is improved, that is, even if the exhaust gas is exhausted from the exhaust pipe 9, the exhaust gas is upward. Since it flows in, the seizure of the surrounding member (for example, the side wall of the grain tank 7, etc.) can be prevented more reliably.

Next, the wind direction changing mechanism 21 will be described with reference to FIG. 10.

As shown in FIG. 10, the wind direction change mechanism 21 can change the position of the circumferential direction of the extension part 11 with respect to the 2nd exhaust pipe 13. As shown in FIG. The wind direction changing mechanism 21 includes three stays 23, six bolt holes 11c, and three bolts 24.

The stay 23 is formed in substantially L shape. The stay 23 is fixed to the second exhaust pipe 13. Specifically, the stay 23 is fixed to the exhaust downstream side edge of the second exhaust pipe 13 by welding. In addition, the exhaust downstream side edge of the 2nd exhaust pipe 13 is formed perpendicularly (refer FIG. 8). In the stay 23, a bolt hole 23a into which the bolt 24 is inserted is formed. The three stays 23 are arranged at equal angles (120 degrees) with respect to the central axis C of the extension part 11 when viewed from the direction of the central axis C of the extension part 11.

The bolt hole 11c is formed in each surface of the six surface of the extension part 11. As shown in FIG. In addition, the six bolt holes 11c are arranged at equal angles (60 degrees) with respect to the central axis C of the extension part 11 when viewed from the direction of the central axis C of the extension part 11. have.

The bolt 24 is inserted into the bolt hole 23a of the stay 23 and the bolt hole 11c of the extension part 11. The extension part 11 is fixed to the second exhaust pipe 13 by inserting the bolt 24 into the bolt hole 23a and the bolt hole 11c.

With this configuration, according to the wind direction changing mechanism 21, the wind direction of the exhaust gas set by the wind direction plate 20 can be changed as follows.

That is, as shown in FIG. 10, when the bolt 24 is removed from the bolt hole 23a of the stay 23 and the bolt hole 11c of the extension part 11, the extension part 11 is removed from a 2nd exhaust pipe. It becomes removable from (13). That is, the position of the circumferential direction of the extension part 11 with respect to the 2nd exhaust pipe 13 can be changed. When the extension part 11 is rotated every 60 degrees around the central axis C, the wind direction plate 20 is fixed to the outer circumferential surface of the extension part 11, so that the wind direction plate for the second exhaust pipe 13 is fixed. The position of 20 can be changed. The extension part 11 can be fixed to the second exhaust pipe 13 by inserting the bolt 24 into the bolt hole 23a of the stay 23 and the bolt hole 11c of the extension part 11. In this way, the wind direction of the exhaust gas set by the wind direction plate 20 can be changed by the wind direction changing mechanism 21. For example, in FIG. 8, although the wind direction plate 20 is located in the lower part of the extension part 11, when the extension part 11 is rotated 180 degrees around the central axis C, the wind direction plate 20 extends. It is located at the top of the portion (11). In particular, in this embodiment, since the cross-sectional shape of the extension part 11 is hexagon (a regular hexagon), only three stays 23 are provided at 120 degree space | interval (even if six stays 23 are not provided). The extension part 11 can be rotated around the central axis C, and the extension part 11 can be firmly fixed to the second exhaust pipe 13 by three points at equal angle intervals.

Hereinafter, another embodiment which concerns on this invention is described.

(1) In the said embodiment, a combine is a self-deleting combine, but a combine may be a normal combine.

(2) In the said embodiment, although the traveling body 1 is a crawler type, the traveling body 1 may be a wheel type.

(3) In the above embodiment, the exhaust pipe 9 extends from the engine 4 to the gas rearward portion upward from the engine 4, but the exhaust pipe 9 does not have to extend to the gas rearward portion. That is, the exhaust pipe 9 may be extended so that the extension part 11 may be located in the threshing apparatus 6 (for example, the front part or the front-rear center part on the threshing apparatus 6) from the side view. .

(4) In the above embodiment, the exhaust pipe main body 10 includes the first exhaust pipe 12 and the second exhaust pipe 13, but the exhaust pipe main body 10 further includes the third exhaust pipe. You can do it. That is, the exhaust pipe main body 10 may be provided with three or more exhaust pipes. Alternatively, the exhaust pipe main body 10 may include only the first exhaust pipe 12.

(5) In the said embodiment, the part (1st bulging part) 7a located above the exhaust pipe 9 in the side surface (left side surface) of the threshing apparatus 6 of the grain tank 7. Is expanded to the side (left side) of the threshing apparatus 6, but the part located below the exhaust pipe 9 is expanded to the side (left side) of the threshing apparatus 6, or the exhaust pipe 9 Rather, the portions located above and below may be expanded to the side (left side) of the threshing apparatus 6.

(6) In the above embodiment, the gap 22 is a gap between the outer circumferential surface of the second exhaust pipe 13 and the inner circumferential surface of the extension part 11, but the gap 22 is the exhaust of the second exhaust pipe 13. It may be a gap between the downstream end edge and the exhaust upstream end edge of the extension portion 11. Alternatively, the gap 22 combines the gap between the outer circumferential surface of the second exhaust pipe 13 and the inner circumferential surface of the extension part 11 and the gap between the outer circumferential surface of the second exhaust pipe 13 and the inner circumferential surface of the extension part 11. One gap may be sufficient. In addition, the gap 18 and the gap 19 can be considered similarly to the gap 22.

(7) In the said embodiment, although the extension part 11 is arrange | positioned on the same axis as the exhaust pipe main body 10 in plan view, the extension part 11 is an exhaust pipe main body ( It may be inclined with respect to 10).

(8) In the said embodiment, although the cross-sectional shape of the extension part 11 is hexagon (a regular hexagon), the cross-sectional shape of the extension part 11 may be polygons other than a hexagon.

(9) In the said embodiment, although the extension part 11 is comprised so that the 1st half-section 11a and the 2nd half-section 11b may be combined, and a cross-sectional shape becomes a hexagon, the extension part 11 is integral. It may be molded.

(10) In the said embodiment, although the wind direction plate 20 is fixed to the outer peripheral surface of the extension part 11 by welding, the method of fixing the wind direction plate 20 to the outer peripheral surface of the extension part 11, Methods other than welding may be sufficient.

(11) In the said embodiment, although the exhaust downstream side edge part of the wind direction plate main body 20a is located on the center axis C of the extension part 11, the exhaust downstream side edge part of the wind direction plate main body 20a does not exist. The extension portion 11 may extend slightly beyond the central axis C or may be slightly shorter.

(12) In the above embodiment, the wind direction changing mechanism 21 includes three stays 23, six bolt holes 11c, and three bolts 24, but the stay 23, The number of the bolt holes 11c and the bolts 24 is not limited to these.

INDUSTRIAL APPLICABILITY The present invention can be used for a combine having an exhaust pipe for discharging exhaust from the engine to the outside air.

1: the traveling body
3: driving unit
4: engine
5a: tail pipe (outlet)
6: threshing device
7: grain tank
7a: first bulge
9: exhaust pipe
10: exhaust pipe main body
11: extension part
12: first exhaust pipe
13: second exhaust pipe
18: gap
19: gap
20: weather vane
21: wind direction change mechanism
22: gap
C: central axis
D3: diameter of the first exhaust pipe
D4: diameter of exhaust pipe body
D5: diameter of extension
D6: diameter of extension

Claims (21)

A driving unit provided at the front of the traveling body,
A threshing apparatus and a grain tank which are arranged in the gas lateral direction in the rear of the driving unit;
An engine installed below the driving unit;
An exhaust pipe for exhausting exhaust gas from the engine to the outside air;
The exhaust pipe has an exhaust pipe main body extending from the engine to at least an upper end of the threshing device between the threshing device and the grain tank, and an extension part attached to an exhaust downstream end of the exhaust pipe main body,
The extension portion is attached to the exhaust downstream end portion of the exhaust pipe body in a state where the diameter thereof is larger than the diameter of the exhaust pipe body, and the exhaust downstream side end portion of the exhaust pipe body is inserted into the exhaust upstream end portion of the extension portion.
A gap is formed between the exhaust pipe main body and the extension part to communicate the outside of the exhaust pipe and the inside of the exhaust pipe.
The member which connects the said exhaust pipe main body and the said extension part is not provided between the outer peripheral surface of the said exhaust pipe main body and the inner peripheral surface of the said extension part in the overlapping location of the exhaust downstream side edge part of the said exhaust pipe main body, and the exhaust upstream end part of the said extension part. And a plurality of stays which connect the exhaust pipe main body and the extension part at intervals in the circumferential direction of the exhaust pipe main body are fixed to an end face on the exhaust downstream side of the exhaust pipe main body,
The combine whose said inner peripheral surface of the said extension part is being fixed to the said stay. According to claim 1, wherein the cross-sectional shape of the exhaust pipe body is circular,
Combine, The cross-sectional shape of the extension is a polygon. The combine of Claim 1 or 2 with which the wind direction plate which sets the wind direction of the exhaust discharged from the said exhaust pipe is attached to the exhaust downstream end part of the said extension part. The said wind direction plate is a combine of Claim 3 attached to the outer peripheral surface of the said extension part so that there may be no clearance gap with the outer peripheral surface of the said extension part. The said wind direction plate is a combine of Claim 3 inclined with respect to the axial direction of the said extension part so that it may become closer to the central axis of the said extension part as the exhaust downstream side. The exhaust downstream side edge part of the said wind direction plate is a combine of Claim 5 extended to the center axis of the said extension part. The said wind direction plate is fixed to the outer peripheral surface of the said extended part,
A combine comprising a wind direction changing mechanism capable of changing the position in the circumferential direction of the extension portion with respect to the exhaust pipe main body. The combine of Claim 1 or 2 whose cross-sectional shape of the said extension part is hexagon. delete The said exhaust pipe is a combine of Claim 1 or 2 extended from the said engine toward upper body back. The said exhaust pipe is a combine of Claim 1 or 2 extended to the gas rear part. The said extension part is a combine of Claim 1 or 2 arrange | positioned behind the rear end part of the said threshing apparatus or the rear end part of the said grain tank. The said gap is a combine of Claim 1 or 2 provided between the outer peripheral surface of the said exhaust pipe main body, and the inner peripheral surface of the said extension part. The said exhaust pipe main body is equipped with the 1st exhaust pipe by the said engine side, and the 2nd exhaust pipe attached to the exhaust downstream side edge part of the said 1st exhaust pipe, The outer exhaust surface of the said 1st exhaust pipe is settled. The combine which has the clearance gap which communicates the exterior of the said exhaust pipe and the inside of the said exhaust pipe between the inner peripheral surfaces of the said 2nd exhaust pipe. The said exhaust pipe is a combine of Claim 14 which is different from the inclination angle of the said 1st exhaust pipe and the inclination angle of a said 2nd exhaust pipe from a side view. The inclination angle of the said first exhaust pipe is a combine of Claim 15 larger than the inclination angle of the said 2nd exhaust pipe. The said 1st exhaust pipe is a combine of Claim 14 extended to the upper end of the threshing apparatus. The diameter of the said extension part is a combine larger than the diameter of the said 2nd exhaust pipe. The diameter of the said 2nd exhaust pipe is a combine of Claim 14 larger than the diameter of the said 1st exhaust pipe. The said engine is provided with the discharge part which discharges exhaust,
The exhaust pipe is equipped with the exhaust pipe,
The combine which is formed between the outer peripheral surface of the said discharge part and the inner peripheral surface of the said exhaust pipe, and the clearance which communicates the exterior of the said exhaust pipe and the inside of the said exhaust pipe is formed. The combine of Claim 1 or 2 which expands the part located in at least one of the upper side and the lower side from the said exhaust pipe by the side of the said threshing apparatus side of the said grain tank to the side of the said threshing apparatus. .

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