JP2022072500A - combine - Google Patents

Abstract

To solve a conventional problem that exhaust gas stagnates at a bend portion of a root portion of tail pipe, which leads to an increase tin the temperature of the bend portion and deterioration of the durability.SOLUTION: A combine includes a thresher 3 disposed at one side above a vehicle frame 1 with a traveling device 2 provided at a lower part thereof, a grain tank 5 at the other side, a control part 6 in front of the grain tank 5, and a reaping part 4 in front of the vehicle frame 1. A DPF 16 for an exhaust gas purifying device 15 for purifying exhaust gas of the engine 11 disposed below a driver's seat of the control part 6 is disposed between the thresher 3 and the grain tank 5. The DPF 16 has an elongated shape in the front-rear direction. A root portion exhaust pipe 27 of a tail pipe 20 is attached to a rear part of the DPF 16. The tail pipe 20 is inclined obliquely to decline toward the rear side above the vehicle frame 1 in a side view. A rear end portion of the tail pipe 20 is positioned below the vehicle frame 1.SELECTED DRAWING: Figure 3

Description

The present invention relates to a combine.

Conventionally, a configuration in which a diesel engine is provided below the driver's seat and a tail pipe is provided behind the diesel engine is known (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-46320

In the above-mentioned known example, the base of the tail pipe is connected to the exhaust gas purification device of the engine, bent downward at a substantially right angle from the base of the tail pipe, and has a shape along the fuselage frame after bending, so that the base of the tail pipe is formed. There is a problem that the exhaust gas is stagnant at the bent portion of the pipe, the bent portion becomes hot, and the durability is lowered.
That is, in order to open the exhaust port of the tail pipe below the fuselage frame, the exhaust port at the upper part of the engine or the middle portion of the tail pipe connected to the exhaust purification device was bent at a right angle.
Further, since the portion of the tail pipe behind the lower bent portion of the tail pipe is along the machine frame, there is a problem that the tail pipe approaches the field scene and comes into contact with straw dust or the like in the field scene.
In the present application, the arrangement configuration of the tail pipe is devised to facilitate the exhaust of the tail pipe.

In the invention of claim 1, a threshing device 3 is provided on one side above the machine frame 1 having a traveling device 2 below, a grain tank 5 is provided on the other side, and a control unit 6 is provided in front of the grain tank 5. The DPF 16 of the exhaust gas purification device 15 provided below the driver's seat of the control unit 6 to purify the exhaust gas of the engine 11 in the combine provided with the cutting device 4 in front of the machine frame 1 is used as the threshing device. The DPF 16 is provided between 3 and the Glen tank 5, and the DPF 16 has a long shape in the front-rear direction. The rear end of the tail pipe 20 is positioned below the body frame 1 as a combine harvester.
According to the second aspect of the present invention, a plate 22 having a shape such that the lower end is provided at the rear end of the tail pipe 20 is provided, and the plate 22 guides the exhaust gas discharged from the tail pipe 20 toward the lower side of the machine body. It is a combine that was made.
According to the third aspect of the present invention, the middle portion of the tail pipe 20 is a combine surrounded by an upper cover 35 having a shape such that the lower portion is open.
According to the fourth aspect of the present invention, the cross-sectional shape of the plate 22 is formed into a polygonal surface shape, and the combine has a predetermined gap between the plate 22 and the upper surface side of the tail pipe 20 and has a small gap. It is a thing.
According to the fifth aspect of the present invention, the plate 22 is a combine in which four points are bent and formed in a rear view.
According to the sixth aspect of the present invention, the fuel tank 24 is mounted on the airframe frame 1 rearward from the rear end portion of the tail pipe 20, and the lower side of the fuel tank 24 is surrounded by the lower cover 30. It is a combine in which the rear end portion of the tail pipe 20 is arranged so as to be higher than the lower surface of the cover 30.

In the invention of claim 1, since the tail pipe 20 is arranged so as to be inclined low and diagonally toward the rear in the side view, the tail pipe 20 has a bent portion that bends at a substantially right angle from the start end portion to the end portion. The rear end of the tail pipe 20 can be positioned below the body frame 1 without being formed, and the flow of exhaust gas from the engine 11 is smooth, and a part of the tail pipe 20 becomes hot. In addition, since the rear end portion of the tail pipe 20 is located below the body frame 1, it is possible to avoid contact with straw dust and the like in the field scene.
In the invention of claim 2, since the plate 22 having a shape such that the lower end is opened at the rear end of the tail pipe 20, it is provided behind the tail pipe 20 by changing the direction of the exhaust gas by the plate 22. The heat effect of the hot air of the exhaust gas on the fuel tank 24 can be suppressed, and the plate 22 surrounds the upper surface side of the tail pipe 20 and the lower side of the plate 22 is open, so that the plate 22 and the straw waste in the field are formed. Reduce contact with such things and prevent fires.
In the invention of claim 3, since the middle portion of the tail pipe 20 is surrounded by the upper cover 35 having a shape such that the lower portion is open, it is possible to prevent the straw debris from directly accumulating on the tail pipe 20.
In the invention of claim 4, the cross-sectional shape of the plate 22 is formed into a polygonal surface shape, and the gap is formed to be small while having a predetermined gap between the plate 22 and the upper surface side of the tail pipe 20. The plate 22 having a polygonal cross section reduces the gap between the tail pipe 20 and the tail pipe 20, and the welding points can be located on the upper portion and the side surface of the pipe, facilitating the welding process.
In the invention of claim 5, since the plate 22 is bent and formed at four points in the rear view, it is not bent more than necessary, so that the labor of bending processing can be reduced and the manufacturing cost can be reduced.
In the invention of claim 6, the fuel tank 24 is mounted on the fuselage frame 1 behind the rear end of the tail pipe 20, and the lower part of the fuel tank 24 is surrounded by the lower cover 30. Since the rear end portion of the tail pipe 20 is arranged so as to be higher than the lower surface of the tail pipe 30, the exhaust port 31 of the tail pipe 20 is arranged at a position higher than the lower surface position of the lower cover 30. Prevents contact and catching between the rear end of 20 and straw debris and the like in the field scene, and prevents fire and the like.

Side view of the combine. A side view showing the positional relationship between the tail pipe and the airframe frame. Same plan view. Sectional view of the tail pipe and plate. Sectional view of the tail pipe, top cover and plate.

Explaining one embodiment of the present invention with reference to the drawings, reference numeral 1 denotes a machine frame of a working machine, and the present application is an example of a combine harvester.
A traveling device 2 is provided below the machine frame 1, and a threshing device 3 is provided on one side above the machine frame 1. A cutting device 4 is provided in front of the threshing device 3, and a grain tank 5 is provided on the side of the threshing device 3 (FIG. 1). 6 is a control unit, 7 is a scraping reel of a cutting device 4, 8 is a cutting blade, 9 is a table, and 10 is a transport elevator.
An engine (diesel engine, hereinafter referred to as an engine) 11 is provided below the driver's seat of the control unit 6 (FIG. 2).
12 is an air cleaner, 13 is a pre-cleaner, and 14 is a pipe.
An exhaust purification device 15 is provided in the exhaust pipe of the engine 11.

As a result, the engine 11 is started, each part of the grain removal device 3 and the harvesting device 4 is driven by the rotation of the engine 11, and the traveling device 2 is driven to run to perform the harvesting and grain removal work. The driving force obtained by burning the supplied fuel is transmitted to each part, and the burned fuel is purified as exhaust gas by the DPF 16 of the exhaust purification device 15 and discharged to the outside of the machine.
The exhaust purification device 15 is composed of a soluble organic component in PM contained in the exhaust gas of the diesel engine 11 and a DPF 16 that oxidizes CO and HC.
The base exhaust pipe portion 21 of the tail pipe 20 is connected to the exhaust pipe portion 17 provided at the rear of the DPF 16 (FIG. 2).

The tail pipe 20 is arranged so as to be inclined low and diagonally toward the rear in the side view.
Therefore, since the tail pipe 20 does not form a bent portion that bends at a substantially right angle from the start end portion to the end portion, the flow of exhaust gas from the engine 11 is smooth, and a part of the tail pipe 20 becomes hot. This can be prevented and durability can be improved.
Further, since the rear end portion of the tail pipe 20 is located below the machine frame 1, it is possible to avoid contact with straw debris in the field scene.
That is, the tail pipe 20 is from the portion of the base exhaust pipe portion 21. In the side view, it is arranged to be tilted low and diagonally toward the rear.

A plate 22 having a shape such that the lower portion is opened is provided at the rear end of the tail pipe 20, and the plate 22 is configured to guide the exhaust gas discharged from the tail pipe 20 toward the lower side of the machine body.
By changing the direction of the exhaust gas by the plate 22, the thermal influence of the hot air of the exhaust gas on the fuel tank 24 provided behind the tail pipe 20 is suppressed.
Further, since the plate 22 surrounds the upper surface side of the tail pipe 20 and the lower side of the plate 22 is open, the contact between the plate 22 and the straw debris in the field is reduced, and a fire or the like is prevented.

When the cross-sectional shape of the plate 22 is formed into a polygonal surface shape and fixed to the upper surface side of the tail pipe 20, the gap is configured to be small while having a predetermined gap (FIG. 4).
That is, the plate 22 surrounds the upper surface side of the tail pipe 20 in order to prevent straw debris from accumulating on the upper surface side of the tail pipe 20, but the inner surface (lower surface) of the plate 22 is the outer surface (upper surface) of the tail pipe 20. ), The outer surface temperature of the plate 22 rises, and when the inner surface (lower surface) of the plate 22 is separated from the outer surface (upper surface) of the tail pipe 20, the installation space for the plate 22 and the tail pipe 20 is widened. In order to have a predetermined gap between the lower surface of the tail pipe 20 and the upper surface of the tail pipe 20 and to make the gap small, the plate 22 is formed into a polygonal shape, and the circular outer surface of the tail pipe 20 and the lower surface of the plate 22 are formed. And are brought into contact with a point (line) by a stay (not shown) and welded.

Therefore, the plate 22 having a polygonal cross section reduces the gap with the tail pipe 20, and the welding points can be formed from the upper portion and the side surface of the pipe, facilitating the welding process.
In the embodiment, by forming the plate 22 into four bending points, the cross-sectional polygonal shape is formed and the plate 22 is not bent more than necessary, so that the labor of bending processing can be reduced and the manufacturing cost can be reduced.
The rear end portion of the tail pipe 20 is arranged so as to be higher than the lower cover 30 surrounding the lower part of the fuel tank 24 (FIG. 2).
Therefore, the lower surface position of the lower cover 30 of the fuel tank 24 can be set to the minimum ground clearance of the machine, and the exhaust port 31 of the tail pipe 20 is arranged at a position higher than the lower surface position of the lower cover 30 to provide a tail. Prevents contact and catching between the rear end of the pipe 20 and straw debris in the field, and prevents fire and the like.

That is, while the rear end portion (exhaust port 31) of the tail pipe 20 connected to the DPF 16 near the upper part of the engine 11 is positioned below the airframe frame 1, it is lower than the airframe frame 1 in the side view toward the rear. Can be tilted diagonally.
An upper cover 35 that covers the upper surface side of the tail pipe 20 is provided on the upper surface side of the tail pipe 20.
The rear end of the upper cover 35 covering the tail pipe 20 is parallel to the mounting angle of the plate 22 behind the tail pipe 20 in the same manner as the tail pipe 20 (providing a plate 22 having a shape that opens downward). Configure.
Therefore, the adverse effect of the hot air of the exhaust gas on the fuel tank 24 behind the tail pipe 20 is suppressed.

Further, since the upper cover 35 (plate 22) is configured to open downward, contact with straw debris and the like on the ground is reduced, and a fire or the like is prevented from occurring.
In addition, it prevents straw from accumulating on the upper surface side of the upper cover.
The upper cover 35 surrounds the middle portion of the tail pipe 20. The upper cover 35 is formed so as to be open at the bottom (FIG. 4).
Therefore, since the upper cover 35 surrounds the upper surface side of the tail pipe 20 and the lower side of the upper cover 35 is open, the hot air of the tail pipe 20 suppresses the temperature of the upper cover 35 from becoming high, and the upper cover 35 is prevented from becoming hot. It is possible to suppress the occurrence of problems such as fires such as dust accumulated on the top.

The cross-sectional shape of the upper cover 35 is formed into a polygonal surface shape, and when fixed to the upper surface side of the tail pipe 20, the gap is configured to be small while having a predetermined gap (FIG. 4).
When the lower surface of the upper cover 35 is brought into close contact with the outer surface (upper surface) of the tail pipe 20, the outer surface temperature of the upper cover 35 rises, but there is a predetermined gap between the lower surface of the upper cover 35 and the upper surface of the tail pipe 20. However, in order to make the gap small, the upper cover 35 is formed in a polygonal shape, and the circular outer surface of the tail pipe 20 and the lower surface of the upper cover 35 are in point (line) contact via a stay (not shown). Let it be welded.
Therefore, the gap between the tail pipe 20 and the tail pipe 20 can be reduced by the upper cover 35 having a polygonal cross section, and the welding portion can be formed from the upper portion and the side surface of the pipe, facilitating the welding process.

In the embodiment, by forming the upper cover 35 into four bending points, the cross-sectional polygonal shape is formed and the upper cover 35 is not bent more than necessary, so that the labor of bending processing can be reduced and the manufacturing cost can be reduced.
The rear end portion of the upper cover 35 is detachably attached to the front end portion of the plate 22 provided at the rear end of the tail pipe 20 so as to be integral with the plate 22.
Therefore, the upper cover 35 and the plate 22 can be easily attached and detached to facilitate maintenance.
Further, since the upper cover 35 and the plate 22 are formed separately, the plate 22 can have a complicated bent configuration in a side view, and the exhaust gas can be satisfactorily guided downward.

In this case, the upper cover 35 is divided and formed according to the bent portion of the tail pipe 20, and the upper cover 35 formed by each division is connected.
In the embodiment, the tail pipe 20 is bent at three points to change the inclination angle, and the upper cover 35 is divided into an upper upper cover 35A, an intermediate upper cover 35B, and a lower upper cover 35C according to the tail pipe 20. ..
Therefore, the tail pipe 20 can be tilted backward and downward as a whole, and each part can be bent in the side view according to each part of the combine to change the tilt angle, which facilitates the arrangement of the tail pipe 20. At the same time, the gap between the upper surface of the tail pipe 20 and the lower surface of the upper cover 35 can be made substantially constant.

The rear end portion of the plate 22 is formed in a shape that is longer than the rear end portion of the upper cover 35 and toward the rear and side of the side surface.
Therefore, by covering the upper part and both side surfaces of the upper cover 35 with the plate 22, the exhaust gas can be surely sent to the lower side, and the heat influence on the fuel tank 24 is suppressed.
The plate 22 at the rear end of the tail pipe 20 is configured to be substantially flush with the lower cover 30 of the fuel tank 24 behind the tail pipe 20.
Therefore, when the lower cover 30 of the fuel tank 24 is set to the minimum ground clearance of the machine, by locating the plate 22 at the same height as the lower cover 30, straw debris and the like in the field scene and the plate 22 can be used. Prevents contact and catching, and prevents the occurrence of fire.

(Action of Embodiment)
The present invention has the above-mentioned configuration, in which the running device 2 runs in the field, the cutting device 4 cuts the grain culms in the field, the cut grain culms are supplied to the threshing device 3, and the threshed grains are threshed. Temporarily store in tank 5.
An engine 11 is provided in the vicinity of the control unit 6, the engine 11 is started, and each part of the threshing device 3 and the cutting device 4 is driven by the rotation of the engine 11 to perform the cutting and threshing work. The exhaust gas is purified by the DPF 16 of the exhaust purification device 15 and discharged to the outside of the machine.

The exhaust purification device 15 is composed of a soluble organic component in PM contained in the exhaust gas of the diesel engine 11 and a DPF 16 that oxidizes CO and HC, and a base exhaust pipe portion 21 of the tail pipe 20 is attached to the rear portion of the DPF 16. Therefore, the exhaust gas from the engine 11 is discharged to the outside of the machine by the tail pipe 20.
Since the tail pipe 20 is arranged so as to be inclined low and diagonally toward the rear in the side view, the tail pipe 20 does not have to form a bent portion that bends at a substantially right angle from the start end portion to the end portion, and the engine The flow of the exhaust gas from the 11 is smooth, it is possible to prevent a part of the tail pipe 20 from becoming hot, and the durability can be improved.

Further, since the rear end portion of the tail pipe 20 is located below the machine frame 1, it is possible to avoid contact with straw debris in the field scene.
A plate 22 having a shape that opens downward is provided at the rear end of the tail pipe 20, and the plate 22 is configured to guide the exhaust gas discharged from the tail pipe 20 toward the lower side of the machine body. The direction of the exhaust gas is changed downward, whereby the thermal effect of the hot air of the exhaust gas on the fuel tank 24 provided behind the tail pipe 20 can be suppressed.

Further, since the plate 22 surrounds the upper surface side of the tail pipe 20 and the lower side of the plate 22 is open, the contact between the plate 22 and the straw debris in the field is reduced, and a fire or the like is prevented.
Since the cross-sectional shape of the plate 22 is formed into a polygonal surface shape, when the lower surface of the plate 22 is fixed to the upper surface side of the tail pipe 20, the gap can be made small while having a predetermined gap.

That is, the plate 22 surrounds the upper surface side of the tail pipe 20 in order to prevent straw debris from accumulating on the upper surface side of the tail pipe 20, but the inner surface (lower surface) of the plate 22 is the outer surface (upper surface) of the tail pipe 20. ), The outer surface temperature of the plate 22 rises, and if the inner surface (lower surface) of the plate 22 is separated from the outer surface (upper surface) of the tail pipe 20, the installation space for the plate 22 and the tail pipe 20 becomes wider. In order to have a predetermined gap between the lower surface of the plate 22 and the upper surface of the tail pipe 20 and to make the gap small, the plate 22 is formed into a polygonal shape, and the circular outer surface of the tail pipe 20 and a point. (Line) are in contact.

Therefore, the plate 22 having a polygonal cross section reduces the gap with the tail pipe 20, and the welding points can be formed from the upper portion and the side surface of the pipe, facilitating the welding process.
In the present embodiment, the plate 22 is bent at four points to form a polygonal cross section, and the plate 22 is not bent more than necessary. Therefore, the labor of bending processing can be reduced and the manufacturing cost can be reduced.
Since the rear end portion of the tail pipe 20 is arranged so as to be higher than the lower cover 30 surrounding the lower part of the fuel tank 24, the lower surface position of the lower cover 30 of the fuel tank 24 is the position of the machine. Even at the minimum ground clearance, the exhaust port 31 of the tail pipe 20 can be arranged at a position higher than the lower surface position of the lower cover 30, and the rear end of the tail pipe 20 can come into contact with or be caught by straw waste or the like in the field scene. And prevent fires.

Since the upper cover 35 covering the middle portion of the tail pipe 20 is formed in a shape such that the lower part is opened like the plate 22, and is configured to be parallel to the mounting angle of the plate 22 behind the tail pipe 20. , The adverse effect of the hot air of the exhaust gas on the fuel tank 24 behind the tail pipe 20 is suppressed.
Further, since the upper cover 35 is configured to open the lower part, the influence of the hot air of the tail pipe 20 is suppressed and the occurrence of a fire or the like is prevented.
In addition, it prevents straw from accumulating on the upper surface side of the upper cover 35.

Since the plate 22 is formed in a shape that is longer than the rear end of the upper cover 35 and longer than the side surface, the rear end of the tail pipe 20 is covered with the plate 22 above and both sides of the upper cover 35. , Exhaust gas can be reliably sent downward, and the heat effect on the fuel tank 24 is suppressed.
Since the plate 22 connected to the rear end of the upper cover 35 is configured to be substantially the same height as the lower cover 30 of the fuel tank 24 behind the tail pipe 20, the lower cover 30 of the fuel tank 24 is configured. When the minimum ground clearance of this machine is set, by locating the plate 22 at the same height as the lower cover 30, it is possible to prevent contact and catching of straw debris and the like in the field scene with the plate 22 and prevent fire, etc. Prevent the occurrence.

1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Mowing device, 5 ... Glen tank, 6 ... Control section, 16 ... DPF, 20 ... Tail pipe, 21 ... Base exhaust pipe section, 22 ... Plate, 24 ... Fuel tank 24, 30 ... Lower cover, 31 ... Exhaust port, 35 ... Upper cover.

Claims (6)

A grain removal device (3) is provided on one side above the machine frame (1) provided with a traveling device (2) below, and a particulate tank (5) is provided on the other side, in front of the Glen tank (5). In a combine provided with a control unit (6) and a cutting device (4) in front of the machine frame (1), the exhaust gas of the engine (11) provided below the driver's seat of the control unit (6) is exhausted. The DPF (16) of the exhaust gas purification device (15) to be purified is provided between the grain removal device (3) and the Glen tank (5), and the DPF (16) has a long shape in the front-rear direction. The base exhaust pipe (27) of the tail pipe (20) is attached to the rear portion, and the tail pipe (20) is inclined lower and diagonally above the body frame (1) in the side view toward the rear, and the tail pipe (20) is used. A combine with the rear end located below the fuselage frame (1). In claim 1, a plate (22) having a shape such that the lower end is provided at the rear end of the tail pipe (20) is provided, and the plate (22) discharges the exhaust gas discharged from the tail pipe (20) to the lower side of the machine body. A combine that is configured to guide you to point. The combine according to claim 1 or 2, wherein the middle portion of the tail pipe (20) is surrounded by an upper cover (35) having a shape such that the lower portion is open. In claims 1 to 3, the cross-sectional shape of the plate (22) is formed into a polygonal surface shape, and a gap is formed while having a predetermined gap between the plate (22) and the upper surface side of the tail pipe (20). A small combine. In claims 2 to 4, the plate (22) is a combine in which four points are bent and formed in a rear view. In claims 1 to 5, a fuel tank (24) is mounted on the airframe frame (1) rearward from the rear end of the tail pipe (20), and the lower part of the fuel tank (24) is covered underneath. A combine that surrounds the lower cover (30) and is arranged so that the rear end of the tail pipe (20) is higher than the lower surface of the lower cover (30).

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