JP2013233087A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that an exhaust air cleaning apparatus, DPF, is not properly restored when temperature decreases, so that exhaust resistance increases and engine output decreases.SOLUTION: In a combine harvester, an engine compartment 19 of an engine 11 is formed in front of a grain tank 5, and an exhaust gas cleaning apparatus 15 which has DOC 16 burning unburnt gas in the exhaust air from the engine 11 and DPF 17 collecting particulate matter in the exhaust gas, is installed in an exhaust pipe 14 connected with the engine 11 which drives a travelling device 2, a thresher 3, and a reaping part 4. The exhaust gas cleaning apparatus 15 is placed in a space 18 behind the engine 11 between the grain tank 5 and the thresher 3. The exhaust gas cleaning apparatus 15 is surrounded by a cover 27. The exhaust gas cleaning apparatus 15 is provided with a sensing part 29 and a sensor 28 which has a sensing signal processing part 30. The sensing signal processing part 30 of the sensor 28 is arranged outside the cover 27.

Description

  The present invention relates to a combine.

  Conventionally, a threshing device is provided on the left side above the fuselage frame, a glen tank is provided on the right side, an engine is provided on the front side of the glen tank, and a DPF (diesel particulate filter) that removes particulate matter in the exhaust gas of the engine is provided. In the space behind the engine and between the grain tank and the threshing device, the exhaust gas flow direction inside the DPF is arranged along the front-rear direction of the fuselage, and the DPF is surrounded by a cover. Is known (Patent Document 1).

JP 2011-135846 A

In the known example, there is a risk that a sensor that detects the temperature or pressure inside the DPF is heated and breaks down.
In the present application, the exhaust emission control device is operated in an optimum state by detecting an operation state by various sensors.

According to the first aspect of the present invention, the threshing device 3 is provided on one side above the machine frame 1 provided with the traveling device 2 below, the grain tank 5 is provided on the other side, and the cutting unit 4 is provided in front of the machine frame 1. An engine room 19 having an engine 11 therein is formed in front of the Glen tank 5, and an exhaust pipe 14 connected to the engine 11 for driving the traveling device 2, the threshing device 3 and the cutting unit 4 is connected to the engine. 11 is provided with an exhaust purification device 15 having a DOC 16 for burning the unburned gas in the exhaust gas from the exhaust gas 11 and a DPF 17 for collecting particulate matter in the exhaust gas, and the exhaust purification device 15 is disposed behind the engine 11. In addition, it is disposed in the space 18 between the grain tank 5 and the threshing device 3, and is surrounded by a cover 27. The exhaust purification device 15 has a sensing unit 29 and a sensing signal processing unit 30. A sensor 28 is provided, and the sensor signal processing unit 30 of the sensor 28 is combined with the outside of the cover 27. Particulate matter in exhaust gas discharged while the engine 11 is driven is filtered by the DPF 17. Removed.
Further, the inside of the cover 27 is always kept at a high temperature, and the exhaust temperature, which is increased by burning the unburned gas by the DOC 16, is suppressed from decreasing due to a decrease in the ambient temperature of the DPF 17, and the particulate matter causes the DPF 17 to The clogging is suppressed, and the soot and the like adhering to the DPF 17 is burned and removed for regeneration.
Moreover, since the sensing signal processing unit 30 of the sensor 28 is disposed outside the cover 27, it is cooled without being affected by the high temperature in the space 18.
The invention according to claim 2 is a combine in which the outer periphery of the upper side connection pipe 21 connecting the exhaust purification device 15 and the engine 11 is surrounded by a pipe cover 35, and the exhaust gas from the engine 11 is connected to the pipe cover. The exhaust gas purification device 15 is reached through the upper side connection pipe 21 surrounded by 35.
According to the third aspect of the present invention, a cooling fan 48 is provided on the outer side of the engine 11, and the air passage 50 that guides air blown from the cooling fan 48 to the tangle 49 of the threshing device 3 is connected to the Glen tank 5 and the threshing. The exhaust gas purifying device 15 is formed in the air passage 50 and is combined with the device 3, and the air blown from the cooling fan 48 flows from the outside to the inside of the engine 11. This blast passes through the turbine 55 between the grain tank 5 and the threshing device 3 and enters the tangle 49 of the threshing device 3. To select.
According to a fourth aspect of the present invention, at a predetermined position inside the engine 11, there is an air guide state in which the blowing direction of the cooling fan 48 is guided to the exhaust purification device 15 side, and a non-conduction that does not guide to the exhaust purification device 15. The combine is provided with a wind guide plate 51 that can be switched to a wind state. During normal cutting operation, the wind guide plate 51 is set in a non-wind guide state, and the air blown by the cooling fan 48 is sent to the exhaust purification device 15. The exhaust gas purification device 15 is kept at a high temperature without being sent, and the air guide plate 51 is switched to the air guide state at the time of regeneration to remove the particulate matter collected in the DPF 17, and the sensing signal processing unit 30 of the sensor 28. Cool down.
According to a fifth aspect of the present invention, a blower mechanism 55 is provided in the middle of the air distribution pipe 14 between the engine 11 and the exhaust purification device 15 so as to be rotated by the exhaust gas of the engine 11 and blown to the exhaust purification device 15 side. The exhaust gas generated by the engine 11 rotates the blower mechanism 55, and the blower mechanism 55 blows air between the threshing device 3 and the Glen tank 5, and the sensor signal processing unit 30 of the sensor 28 is turned on. Cooling.

According to the first aspect of the present invention, the DPF 17 can be disposed in the vicinity of the engine 11, particulate matter can be removed by the DPF 17 before the exhaust from the engine 11 is cooled, and the exhaust purification device 15 is surrounded by the cover 27. Thus, the periphery of the DPF 17 inside the cover 27 can be kept at a high temperature, and the regeneration efficiency of the particulate matter can be improved by increasing the regeneration efficiency of the DPF 17. In addition, since the detection signal processing unit 30 of the sensor 28 is not easily affected by the high temperature in the cover 27, it is possible to prevent breakage and enhance durability.
In the second aspect of the invention, in addition to the effect of the first aspect of the invention, the upper connection pipe 21 is surrounded by the pipe cover 35. Can be kept at a high temperature, and the filtration removal efficiency of the particulate matter of DOC16 and DPF17 can be improved.
In the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, the detection signal processing unit 30 of the sensor 28 provided on the outer periphery of the cover 27 of the exhaust purification device 15 is provided in the air passage 50. It is possible to cool with the cooling air from the cooling fan 48 that passes through the sensor 28, prevent the sensing signal processing unit 30 of the sensor 28 from being damaged, and improve the durability.
In the invention according to claim 4, in addition to the effect of the invention according to claim 1, 2 or 3, the temperature of the exhaust gas purification device 15 is normally kept high by setting the air guide plate 51 in a non-air guide state. And a decrease in the regeneration efficiency of the DPF 17 can be reduced.
In the invention of claim 5, in addition to the effect of the invention of claim 1 or claim 2 or claim 3 or claim 4, the blower mechanism is provided in the vicinity of the sensing signal processing unit 30 of the sensor 28 of the exhaust purification device 15. 55 is located, so that the cooling efficiency can be improved, and the exhaust gas of the engine 11 is used to blow air, so that no transmission mechanism for rotating the blower mechanism 55 is required, and the manufacturing cost is reduced. Can be reduced.

The side view of a combine. The rear view of exhaust gas purification device vicinity. 1 is a schematic perspective view of an exhaust purification device and an engine periphery. The side view of an exhaust gas purification apparatus. The rear view of a mounting frame part. The rear view of a fixing member. Flow diagram. The front view of the engine vicinity. The top view near an engine. The same side view. FIG. The same side view. The front view. The same side view. The same side view.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a machine body frame of a work machine, and this application is an embodiment of a combine.
A traveling device 2 is provided below the body frame 1, and a threshing device 3 is provided on one side above the body frame 1. A mowing unit 4 is provided in front of the threshing device 3, and a glen tank 5 is provided on the side of the threshing device 3. 6 is a control part.
An engine 11 is provided below the driver's seat 10 of the control unit 6 (FIG. 1), an exhaust pipe 14 of an exhaust device 12 is connected to the engine 11, and an exhaust purification device 15 is provided in the middle of the exhaust pipe 14.
The exhaust purification device 15 includes a DOC 16 (Diesel Oxidation Catalyst) and a DPF 17 (Diesel particulate filter, diesel particulate filter). The DOC 16 burns unburned gas to raise the exhaust temperature, and the particulate matter is removed by the DPF 17.
The DOC 16 and the DPF 17 have a shape that is long in the front-rear direction, and is disposed behind the engine 11 and between the grain tank 5 and the threshing device 3, and the space 18 provided with the DOC 16 and the DPF 17 and the engine 11 The engine room 19, which is a space provided with

That is, the DOC 16 and the DPF 17 are installed behind the engine 11 and in a substantially sealed space 18 between the grain tank 5 and the threshing device 3 so that the space 18 communicates with the engine room 19.
Therefore, the space 18 is always heated by the hot air of the engine 11, and the exhaust temperature, which is increased by burning the unburned gas by the DOC 16, is suppressed from decreasing due to the decrease in the ambient temperature of the DPF 17. It is possible to suppress the clogging of the DPF 17 by the substance, and to burn and remove the soot and the like adhering to the DPF 17 to regenerate them. As a result, the filtration removal efficiency of the DPF 17 can be improved.
Further, the DOC 16 and the DPF 17 can be provided by effectively using the space between the Glen tank 5 and the threshing device 3.
In this case, an upper side connection pipe 21 that constitutes a part of the exhaust pipe 14 connected to the engine 11 is connected to the front surface front part of the DOC 16, and the exhaust pipe 14 is connected to the lower surface rear side part of the DPF 17. The lower side connection piping 23 which comprises a part is connected.
Reference numeral 25 denotes an attachment frame that supports the exhaust purification device 15, and the exhaust purification device 15 is disposed between the grain tank 5 and the threshing device 3.

Further, if the DPF 17 adheres soot or the like among the particulate matter for a predetermined amount or more, the exhaust resistance increases. Therefore, the mowing and threshing operation is temporarily stopped, the engine 11 is idled, and the particulate matter in the DPF 17 is removed. Manual regeneration work is performed to remove deposits by burning.
The exhaust purification device 15 is surrounded by a cover 27 to form the substantially sealed space 18 in the cover 27.
The exhaust purification device 15 is provided with a sensor 28, which is disposed outside the cover 27 (FIG. 2).
That is, the sensor 28 includes a sensing unit 29 and a sensing signal processing unit 30, and the sensing signal processing unit 30 may not be stable in a high temperature environment.
Therefore, the detection signal processing unit 30 of the sensor 28 is arranged outside the cover 27 so as not to be affected by high temperature, prevents damage and does not deteriorate durability.
The sensor 28 includes, for example, a front pressure sensor 31 that detects the pressure of the DOC 16 and a rear pressure sensor 32 that detects the pressure of the DPF 17, and detects a pressure difference between the DOC 16 and the DPF 17 to determine the degree of clogging (FIG. 2).
Moreover, the sensor 28 may arrange the temperature sensor 34 in three places between the DOC 16 and the DPF 17 (FIG. 13). By providing the temperature sensor 34, the combustion temperature of the DPF 17 is detected, and the combustion condition in the DPF 17 is detected. The filtration removal status of the DPF 17 and the regeneration status for removing the deposit are grasped.

Further, since the outer periphery of the exhaust purification device 15 is surrounded by the cover 27, it is possible to prevent the operator's body from coming into contact with the exhaust purification device 15 during maintenance or the like, thereby improving safety.
In this case, the outer periphery of the upper connection pipe 21 of the DOC 16 is also surrounded by the pipe cover 35 (FIG. 2).
Therefore, the exhaust temperature in the upper connection pipe 21 from the engine 11 to the DOC 16 is not lowered, and the filtration removal efficiency of the DPF 17 is not lowered.
The upper side connection pipe 21 and the pipe 41 from the exhaust outlet 40 of the engine 11 are connected by a flex pipe 42 (FIG. 4). The flex pipe 42 is arranged so that the expansion / contraction direction of the flex pipe 42 and a line connecting the input pulley 43 and the output pulley 44 that are rotationally transmitted from the engine 11 to the threshing device 3 intersect at an angle of 45 degrees or more. .
Therefore, since the flex pipe 42 is shaken by the vibration of the engine 11 in the transverse direction intersecting the expansion / contraction direction, the durability of the entire piping configuration including the flex pipe 42 can be improved without reducing the vibration absorption. .

The upper-side connection pipe 21 is provided on the front side of the upper surface of the main body 45 of the exhaust purification device 15 and is provided below the exhaust discharge port 40 (FIG. 4).
Moreover, the base part (exhaust port of the exhaust gas purification device 15) of the lower side connection pipe 23 is provided in the rear part of the main body 45, and is provided in the vicinity of the center of the combine body below the first conveyor 46 of the threshing device 3 (see FIG. 4).
Therefore, the flow of exhaust gas from the exhaust discharge port 40 to the base of the lower connection pipe 23 becomes smooth, and the entire length of the exhaust pipe 14 is shortened.
A cooling fan 48 is provided on the outer side of the engine 11, and an air passage 50 for sending air from the cooling fan 48 to the tangle 49 of the threshing device 3 is formed between the grain tank 5 and the threshing device 3, The exhaust purification device 15 is disposed in the air passage 50 (FIG. 6).
Therefore, the sensing signal processing unit 30 of the sensor 28 provided on the outer periphery of the cover 27 of the exhaust purification device 15 is positioned in the air passage 50, and the cooling air from the cooling fan 48 is sent to the sensing signal processing unit 30 of the sensor 28. To act on cooling.

In this case, an air guide plate 51 is provided on the inner side of the engine 11 so that the vertical axis 52 is rotatable. The air guide plate 51 is configured to be switchable between a non-air guide state parallel to the air blowing direction of the cooling fan 48 and a wind guide position protruding in a direction crossing the air blowing direction (FIG. 7).
That is, normally, the air guide plate 51 is set in a non-air guide state, the air sent from the cooling fan 48 is not sent to the exhaust gas purification device 15, the temperature of the exhaust gas purification device 15 is kept high, and the air guide plate is used when the DPF 17 is regenerated. 51 is switched to a wind guide state, and the sensing signal processing unit 30 of the sensor 28 is cooled.
When the sensing signal processing unit 30 of the sensor 28 is cooled by the cooling fan 48, when the DPF 17 is forcibly regenerated, the driving rotational speed of the cooling fan 48 is increased (FIG. 5).
For this reason, even if the ambient temperature becomes high due to forced regeneration of the DPF 17, the cooling air from the cooling fan 48 whose drive rotation speed has been increased cools the detection signal processing unit 30 of the sensor 28. Damage to the signal processing unit 30 is prevented.
The cooling fan 48 is configured such that the driving force from the engine 11 is continuously shifted by a fan continuously variable transmission 48A and driven, and the fan continuously variable transmission is driven to rotate forward by a 48A switching motor 48B. Thus, it is possible to switch between a cooling state in which the air is blown from the outside to the inside of the radiator cover 48C and a dust removal state in which the air is driven in the reverse direction and is blown from the inside to the outside of the radiator cover 48C.

FIGS. 8 and 9 show another embodiment of the air blowing mechanism for the exhaust purification device 15, and the engine 11 is disposed in the middle of a pipe 41 between the exhaust exhaust port (not shown) of the engine 11 and the exhaust purification device 15. A blower mechanism (turbine) 55 that is rotated by the exhaust gas is provided.
Therefore, since the blower mechanism 55 is located in the vicinity of the detection signal processing unit 30 of the sensor 28 of the exhaust purification device 15, the cooling efficiency can be improved.
Since the exhaust gas of the engine 11 is used to blow air, a transmission mechanism that rotates the blower mechanism 55 becomes unnecessary, and the cost and weight are reduced.
An inner fan 56 is mounted in the pipe 41, and an outer fan 58 is provided on a protruding portion of the rotating shaft 57 of the inner fan 56 outside the pipe 41.
Therefore, the inner fan 56 rotates due to exhaust from the engine 11, and the rotation of the inner fan 56 is transmitted to the outer fan 58 via the rotation shaft 57 and rotated, and the air blown by the outer fan 58 is directed to the exhaust purification device 15. And blow.

10 and 11 show another embodiment of the lower connection pipe 23 of the exhaust gas purification device 15, and one or a plurality of intake portions 60 are provided in the lower connection pipe 23.
That is, the connecting cylinder 62 having a diameter larger than that of the cylindrical portion 61 is exposed at the tip of the cylindrical portion 61 provided on the rear side of the lower surface of the main body 45 of the exhaust purification device 15, and the outer periphery of the cylindrical portion 61 and the base portion of the connecting cylinder 62 are disposed. The air intake portion 60 is formed by forming a gap between the circumferences. The intake section 60 sucks outside air into the lower connection pipe 23 and lowers the temperature of the exhaust gas in the lower connection pipe 23.
In the embodiment of FIG. 10, the tip of the cylinder part 61 faces the large-diameter connection cylinder 62, but the tip of the cylinder part 61 may be fitted in the large-diameter connection cylinder 62.
In the embodiment of FIG. 11, the base of another second connection cylinder 63 is fitted to the tip of the connection cylinder 62, and the intake portion 60 is formed in this overlapped portion.
FIGS. 12 and 13 show another embodiment relating to the arrangement of the exhaust purification device 15, and a part or all of the exhaust purification device 15 is placed below the upper surface of the body frame 1.

Therefore, the exhaust purification device 15 can be arranged in the space between the threshing device 3 and the lower part of the Glen tank 5 in the rear view, and the capacity of the Glen tank 5 is not reduced.
In addition, since part or all of the exhaust purification device 15 is disposed from the upper surface of the fuselage frame 1, the upper surface of the exhaust purification device 15 that is a high temperature portion only needs to be surrounded by the cover 68. Easy and safe.
In this case, if the exhaust purification device 15 is disposed between the left and right rolling cylinders 70 of the traveling device 2, the space can be used more effectively (FIGS. 14 and 15).
Since the exhaust purification device 15 can be arranged at a low position, the capacity of the Glen tank 5 can be further expanded.

(Operation of Example)
The engine 11 is started, each part of the threshing device 3 and the cutting unit 4 is driven by the rotation of the engine 11, and the traveling device 2 is driven to run and perform the cutting and threshing work.
The engine 11 transmits the driving force obtained by burning the supplied fuel to each part, and the burned fuel is discharged out of the machine through the exhaust device 12 as exhaust gas.
Since the exhaust gas purification device 15 is provided in the exhaust device 12, the particulate matter in the exhaust gas of the engine 11 is filtered and removed by the exhaust gas purification device 15.
The exhaust purification device 15 is composed of a DOC 16 and a DPF 17, the DOC 16 burns unburned gas in the exhaust gas from the engine 11 to raise the exhaust temperature, and sends the exhaust gas to the DPF 17 to remove particulate matter. To do.
The exhaust purification device 15 is disposed behind the engine 11 and in the space 18 between the grain tank 5 and the threshing device 3 and is surrounded by the cover 27 so that the space 18 is always in the interior. The exhaust temperature, which is heated by the hot air of the engine 11 and burned by the DOC 16 and increased, and the ambient temperature of the DPF 17 are suppressed from decreasing, and the particulate matter clogs the DPF 17. In addition, the soot and the like adhering to the DPF 17 is burned, removed and regenerated, and as a result, the filtration removal efficiency of the DPF 17 can be improved.

In this case, the upper side front side portion of the DOC 16 is connected to the upper side connection pipe 21 constituting a part of the exhaust pipe 14 connected to the engine 11, and the lower side rear side portion of the DPF 17 is connected to the exhaust pipe provided at the rear part of the fuselage. 14 is connected to the lower side connection pipe 23 that constitutes a part of the engine 14, so that the exhaust from the engine 11 enters the DOC 16 through the upper side connection pipe 21, and the exhaust from which particulate matter has been removed by the DPF 17 is lower. The air is exhausted from the side connection pipe 23.
Further, if the DPF 17 adheres soot or the like among the particulate matter for a predetermined amount or more, the exhaust resistance increases. Therefore, the mowing and threshing operation is temporarily stopped, the engine 11 is idled, and the particulate matter in the DPF 17 is removed. Manual regeneration work is performed to remove deposits by burning.
The exhaust purification device 15 is installed in a space 18 that is substantially sealed by a cover 27. The exhaust purification device 15 is provided with a sensor 28 having a sensing unit 29 and a sensing signal processing unit 30, and the sensing signal processing unit 30 of the sensor 28 is provided. Is disposed outside the cover 27, the sensing signal processing unit 30 of the sensor 28 is not affected by the high temperature in the cover 27, prevents breakage, and does not reduce durability.

For example, when the sensor 28 includes a pressure sensor 31 that detects the pressure of the DOC 16 and a rear pressure sensor 32 that detects the pressure of the DPF 17, the pressure difference between the DOC 16 and the DPF 17 is detected by the pressure sensor 31 and the rear pressure sensor 32. The degree of clogging of the DPF 17 is determined from the result.
In addition, the sensor 28 may be provided with temperature sensors 34 at three locations between the DOC 16 and the DPF 17, and the temperature sensor 34 detects the combustion temperature of the DPF 17, and the DPF 17 is filtered and removed from the state of combustion in the DPF 17. The reproduction status for removing the deposit is grasped.
Further, since the outer periphery of the exhaust purification device 15 is surrounded by the cover 27, it is possible to prevent the operator's body from coming into contact with the exhaust purification device 15 during maintenance or the like, thereby improving safety.
Since the outer periphery of the upper connection pipe 21 that connects the DOC 16 of the exhaust purification device 15 and the engine 11 is also surrounded by the pipe cover 35, the exhaust temperature in the upper connection pipe 21 from the engine 11 to the DOC 16 is not lowered. The filter removal efficiency of DPF 17 is not lowered.

The upper-side connecting pipe 21 and the pipe 41 from the exhaust outlet 40 of the engine 11 are connected by a flex pipe 42, and the flex pipe 42 is rotated and transmitted from the engine 11 to the threshing device 3. Since the line connecting the input pulley 43 and the output pulley 44 intersects at an angle of 45 degrees or more, the vibration of the engine 11 hardly acts on the expansion and contraction direction of the flex pipe 42 and crosses The durability of the entire piping configuration including the flex pipe 42 can be improved without acting on the direction and reducing the vibration absorption.
The upper-side connection pipe 21 is a front side front portion of the main body 45 of the exhaust purification device 15 and is provided below the exhaust discharge port 40, and the base of the lower-side connection piping 23 (the exhaust port of the exhaust purification device 15) is Since it is provided in the rear part of the main body 45 and below the first conveyor 46 of the threshing device 3 and in the vicinity of the center of the combine body, the flow of exhaust gas from the exhaust outlet 40 to the base of the lower connection pipe 23 becomes smooth, Further, the overall length of the exhaust pipe 14 is shortened.

A cooling fan 48 is provided on the outer side of the engine 11, and an air passage 50 for sending air from the cooling fan 48 to the tangle 49 of the threshing device 3 is formed between the glen tank 5 and the threshing device 3. Since the exhaust purification device 15 is disposed in the passage 50, the sensing signal processing unit 30 of the sensor 28 provided on the outer periphery of the cover 27 of the exhaust purification device 15 is positioned in the air passage 50, and the cooling fan The cooling air from 48 is applied to cooling the sensing signal processing unit 30 of the sensor 28.
In this case, an air guide plate 51 is provided inside the engine 11 so as to be rotatable about the longitudinal axis 52. Since the wind guide plate 51 is configured to be switchable between a non-wind guide state parallel to the blowing direction of the cooling fan 48 and a wind guide position protruding in a direction crossing the blowing direction, the wind guide plate 51 is usually used. In the non-air-conducting state, the air of the cooling fan 48 is not sent to the exhaust gas purification device 15, the temperature of the exhaust gas purification device 15 is kept high, and when the DPF 17 is regenerated, the air-guiding plate 51 is switched to the air-conducting state. The 28 sensing signal processing units 30 are cooled.

Further, when the sensing signal processing unit 30 of the sensor 28 is cooled by the cooling fan 48, when the DPF 17 is forcibly regenerated, the driving rotational speed of the cooling fan 48 is increased. Even in this case, the cooling air from the cooling fan 48 whose drive rotation speed is increased can cool the detection signal processing unit 30 of the sensor 28, and the damage of the detection signal processing unit 30 of the sensor 28 is prevented.
In another embodiment of the air blowing mechanism for the exhaust gas purification device 15 in FIG. 8, the exhaust gas of the engine 11 is rotated in the middle of the pipe 41 between the exhaust gas exhaust port (not shown) of the engine 11 and the exhaust gas purification device 15. Since the air blowing mechanism 55 is provided, the air blowing mechanism 55 can be positioned in the vicinity of the sensing signal processing unit 30 of the sensor 28 of the exhaust gas purification device 15, and the cooling of the sensing signal processing unit 30 of the sensor 28 can be performed. Efficiency can be improved.
Moreover, since it exhausts using the exhaust gas of the engine 11, the transmission mechanism which rotates the ventilation mechanism 55 becomes unnecessary, and cost and weight are reduced.
Each of the above-described embodiments is illustrated and described separately or mixed for easy understanding. However, these embodiments can be combined in various ways, and these expressions can be used for configuration and operation. However, there is a case where a synergistic effect is obtained.

  DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Cutting part, 5 ... Glen tank, 10 ... Driving seat, 11 ... Engine, 12 ... Exhaust device, 15 ... Exhaust gas purification device, 16 ... DOC, 17 DESCRIPTION OF SYMBOLS DPF, 18 ... Space, 19 ... Engine room, 21 ... Upper side connection piping, 23 ... Lower side connection piping, 25 ... Mounting frame, 27 ... Cover, 28 ... Sensor, 29 ... Sensing unit, 30 ... Sensing signal processing unit , 31 ... Pressure sensor (front pressure sensor), 32 ... Rear pressure sensor, 34 ... Temperature sensor, 35 ... Piping cover, 40 ... Exhaust outlet, 41 ... Piping, 42 ... Flex pipe, 43 ... Input pulley, 44 ... Output pulley, 45 ... main body, 46 ... first conveyor, 48 ... cooling fan, 49 ... Kara, 50 ... air passage, 51 ... air guide plate, 55 ... air blow mechanism, 56 ... inner fan, 57 ... rotating shaft, 58 ... Side fan, 60 ... suction portion, 61 ... cylindrical part, 62 ... connecting tube, 63 ... second connecting tube, 68 ... cover, 70 ... rolling cylinder.

Claims (5)

  A threshing device (3) is provided on one side above the machine frame (1) provided with a traveling device (2) below, a grain tank (5) is provided on the other side, and cutting is performed in front of the machine frame (1). The engine room (19) which has an engine (11) inside is formed in the front of the Glen tank (5), a traveling device (2), a threshing device (3), and a cutting part (4 The DOC (16) for burning the unburned gas in the exhaust from the engine (11) and the particulate matter in the exhaust gas are collected in the exhaust pipe (14) connected to the engine (11) driving And an exhaust gas purification device (15) having a DPF (17) that is disposed behind the engine (11), the Glen tank (5) and the threshing device (3). In the space (18) between and the cover (27) The exhaust purification device (15) is provided with a sensor (28) having a sensing unit (29) and a sensing signal processing unit (30), and the sensing signal processing unit (30) of the sensor (28) is provided with the sensor (28). A combine placed outside the cover (27).   The combine according to claim 1, wherein the outer periphery of the upper connection pipe (21) connecting the exhaust purification device (15) and the engine (11) is surrounded by a pipe cover (35).   In the invention according to claim 1 or claim 2, a cooling fan (48) is provided on the outer side of the engine (11), and air from the cooling fan (48) is sent to the threshing device (49) of the threshing device (3). The air path (50) which leads to) is formed between the grain tank (5) and the threshing device (3), and the exhaust purification device (15) is disposed in the air path (50).   In the invention according to claim 1, claim 2, or claim 3, the air blowing direction of the cooling fan (48) is guided to the exhaust purification device (15) side at a predetermined position inside the engine (11). A combine provided with a wind guide plate (51) that can be switched between a wind guide state and a non-wind guide state that is not guided to the exhaust emission control device (15).   In the invention according to claim 1, claim 2, claim 3, or claim 4, the engine (11) is disposed in the middle of the air distribution pipe (14) between the engine (11) and the exhaust gas purification device (15). A combine provided with a blowing mechanism (55) that rotates by exhaust gas and blows air toward the exhaust purification device (15).

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