JP2021164474A - combine - Google Patents

Abstract

To provide a combine that can compactly install an exhaust gas purification device.SOLUTION: A combine of the present invention includes an engine 14 mounted on a traveling body 1, an exhaust gas purification device 74 composed of a first case 75 for removing particulate matters in exhaust gas of the engine 14 and a second case 229 for removing nitrogen oxidizing substances in exhaust gas of the engine 14, an engine room 97 in which the engine 14 is installed, a grain removal device 5 for grain removal, and a grain tank 7 which is behind the engine room 97 and carries the grain removed by the grain removal device 5. The exhaust gas purification device 74 is arranged in a recess 7a facing the engine room 97 out of the grain tank 7. An exhaust connecting pipe 119 connecting the engine 14 and the exhaust gas purification device 74 is arranged below a frame 91 forming the engine room 97. An exhaust connecting pipe 119 communicates with an inlet pipe 81 provided in the exhaust gas purification device 74.SELECTED DRAWING: Figure 6

Description

The present invention relates to a combine such as a combine that cuts a grain planted in a field and collects grains, or a feed combine that cuts a grain for feed and collects it as feed, and more specifically, a diesel engine or the like. It relates to a combine provided with an exhaust gas purifying device for removing particulate matter (soot, particulate) contained in the exhaust gas of the above, or nitrogen oxidizing substances (NOx) contained in the exhaust gas.

Conventionally, a case in which a diesel particulate filter is internally installed (hereinafter referred to as a DPF case) and a urea selective reduction catalyst are internally installed as an exhaust gas purification device (exhaust gas aftertreatment device) in the exhaust path of a diesel engine. There is known a technique for purifying the exhaust gas discharged from a diesel engine by providing a case (hereinafter referred to as an SCR case) and introducing the exhaust gas into the DPF case and the SCR case (for example, Patent Documents 1 to 3). reference). In addition, conventionally, the combine has a structure in which uncut grain culms in a field are cut by a cutting blade device, the cut grain culms are transported to a threshing device by a grain culm transport device to thresh, and grains are collected in a grain tank. Therefore, the engine was mounted on the traveling machine, the DPF case was arranged in a sideways posture on the upper surface side of the engine, and the exhaust gas was discharged from the engine toward the DPF case (see, for example, Patent Document 4). ).

Japanese Unexamined Patent Publication No. 2009-74420 Japanese Unexamined Patent Publication No. 2012-21505 Japanese Unexamined Patent Publication No. 2012-177233 Japanese Unexamined Patent Publication No. 2010-209813

In the above-mentioned prior art, in a structure in which the engine and the exhaust gas purification device (DPF case) are installed close to each other in the engine room, it is necessary to secure an installation space for the exhaust gas purification device (SCR case) around the engine mounting portion. There is a problem that the engine room volume or the exhaust gas purification device (DPF case or SCR case) volume is limited. Further, in the structure in which the exhaust gas purification device (DPF case or SCR case) is supported on the outside of the engine room, the mounting position of the urea mixing pipe for connecting the SCR case to the DPF case or the exhaust gas purification device is restricted, and the exhaust gas is exhausted. There is a problem that the mounting structure of the purification device cannot be simplified. In a structure such as a freight vehicle in which an exhaust gas purification device (DPF case or SCR case) is installed in a traveling body located away from the engine, an installation space for the exhaust gas purification device can be easily secured, but exhaust gas. There is a problem that the exhaust gas temperature in the purification device tends to drop below a predetermined temperature.

Therefore, the present invention is intended to provide a combine that has been improved by examining these current conditions.

In order to achieve the above object, the present invention presents an engine as a power source mounted on a traveling machine, a first case for removing particulate matter in the exhaust gas of the engine, and nitrogen oxidation in the exhaust gas of the engine. An exhaust gas purification device composed of a second case for removing substances, an engine room in which the engine is installed, a grain removal device for grain removal, and grains that are behind the engine room and have been grain removed by the grain removal device. In a combine provided with a grain tank for carrying in, the exhaust gas purification device is arranged in a recess of the grain tank facing the engine room, and the engine and the engine are placed below a frame forming the engine room. An exhaust connecting pipe that connects the exhaust gas purifying device is arranged, and the inlet pipe provided in the exhaust gas purifying device is communicated with the exhaust connecting pipe.

In the combine, the first case and the second case are arranged so that their longitudinal directions are along the front and rear of the traveling direction of the traveling aircraft, and the first case and the second case are located at locations facing the engine in the first case. It may be provided with an inlet pipe.

In the combine, the inlet pipe may be arranged on the lower surface side of the first case.

According to the present invention, in the grain tank, the exhaust gas purification device is arranged in a recess of the grain tank facing the engine room, and the engine and the engine are located below the frame forming the front engine room. An exhaust connecting pipe that connects the exhaust gas purifying device is arranged, and the inlet pipe provided in the exhaust gas purifying device is communicated with the exhaust connecting pipe. Therefore, between the grain tank and the engine room. The engine and the exhaust gas purification device can be configured in a short path, and the exhaust heat from the engine can be guided to the exhaust gas purification device. As a result, a high purification effect can be maintained in the exhaust gas purification device.

It is a left side view of the 6-row cutting combine which shows the embodiment of this invention. It is the same plan view. It is the right side view of the same. It is a front perspective view which shows the structure in an engine room. It is a perspective view which shows the positional relationship between the engine peripheral parts and a grain tank and a threshing machine. It is an external perspective view which shows the engine and the exhaust gas purification apparatus. It is a rear perspective view of the exhaust gas purification device mounting part. It is a right side view which shows a part of a threshing apparatus. It is an explanatory diagram of urea water supply. It is a perspective view which shows the component arrangement on the traveling machine body in the combine which becomes 1st Embodiment. It is a rear perspective view of the combine. It is a plan view of the combine. It is a top view of the combine which becomes the 2nd Embodiment. It is a rear perspective view of the combine. It is a front view of the urea water tank in the combine. It is a right side view of the combine. It is a perspective view which shows the arrangement of each part in the combine which becomes 3rd Embodiment. It is a left side view which shows the inside of the threshing apparatus of the combine. It is a perspective view which shows the component arrangement on the traveling machine body in the combine which becomes 4th Embodiment. It is a rear perspective view of the combine. It is a figure which shows the modification of the urea water tank in the combine. It is a perspective view which shows the component arrangement on the traveling machine body in the combine which becomes 5th Embodiment. It is a front view (left side view of the combine) of the fuel tank and the urea water tank of the combine. It is a front view (the left side view of the combine) which shows the 1st modification of the fuel tank and the urea water tank of the combine. It is a side view which shows the structure of the fuel tank and the urea water tank shown in FIG. 24. It is a side view which shows the structure when the fuel tank and the urea water tank shown in FIG. 24 are separated. It is a front view (the left side view of the combine) which shows the 2nd modification of the fuel tank and the urea water tank of the combine. It is a side view which shows the structure of the fuel tank and the urea water tank shown in FIG. 27. It is a front view which shows the state when the urea water is filled in the urea water tank shown in FIG. 27.

<First Embodiment>
Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. 1 to 12. The overall structure of the combine of the embodiment in which the diesel engine is mounted will be described with reference to FIGS. 1 to 3. In the following description, the left side of the traveling aircraft 1 in the forward direction is simply referred to as the left side, and the right side of the traveling aircraft 1 in the forward direction is simply referred to as the right side. As shown in FIGS. 1 to 3, a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 as traveling portions is provided. A cutting device 3 for 6-row cutting, which takes in while cutting grain culms, is mounted on the front part of the traveling machine body 1 so as to be adjustable up and down around the cutting rotation fulcrum shaft 4a by a single-acting lifting hydraulic cylinder 4. NS. A threshing device 5 having a feed chain 6 and a grain tank (glen tank) 7 for storing grains taken out from the threshing device 5 are mounted side by side on the traveling machine 1. The threshing device 5 is arranged on the left side of the traveling machine 1, and the grain tank 7 is arranged on the right side of the traveling machine 1.

Further, a grain discharge conveyor 8 that can be swiveled via a vertical take-out conveyor 8a is provided at the rear of the traveling machine body 1, and grains inside the grain tank 7 can be moved from a paddy throwing port 9 of the grain discharge conveyor 8 to a truck bed or a truck bed. It is configured to be discharged to a container or the like. An operating cabin 10 is provided on the right side of the reaping device 3 and on the front side of the grain tank 7. A cabin rotation fulcrum shaft 10a is provided at the lower part of the front surface of the operation cabin 10, and the lower part of the front surface of the operation cabin 10 is rotatably supported on the traveling machine 1 via the cabin rotation fulcrum shaft 10a so as to be directed toward the front side outside the machine. The operation cabin 10 is movably installed, and the operation cabin 10 is configured to rotate forward around the cabin rotation fulcrum shaft 10a.

In the driving cabin 10, the steering handle 11, the driver's seat 12, the main shifting lever 15, the auxiliary shifting lever 16, the threshing clutch lever 17 for turning on and off the threshing clutch, and the cutting clutch lever for turning on and off the cutting clutch. 18 and are arranged. A diesel engine 14 as a power source is arranged in the traveling machine body 1 below the driver's seat 12. The driving cabin 10 is provided with a step for the operator to board, a steering wheel column provided with the steering handle 11, and a lever column provided with the levers 15, 16, 17, and 18.

As shown in FIG. 1, the left and right track frames 21 are arranged on the lower surface side of the traveling machine body 1. The track frame 21 includes a drive sprocket 22 that transmits the power of the engine 14 to the traveling crawler 2, a tension roller 23 that maintains the tension of the traveling crawler 2, and a plurality of track rollers that hold the grounding side of the traveling crawler 2 in a grounded state. 24 and an intermediate roller 25 for holding the non-grounded side of the traveling crawler 2 are provided. The drive sprocket 22 supports the front side of the traveling crawler 2, the tension roller 23 supports the rear side of the traveling crawler 2, the track roller 24 supports the ground side of the traveling crawler 2, and the intermediate roller 25 supports the non-traveling crawler 2. Support the ground side.

As shown in FIGS. 1 and 2, a fuel tank 31 for storing fuel to be supplied to the engine 14 is arranged at the rear left side of the traveling machine body 1, and diesel fuel is poured into the fuel tank 31 from the outside of the machine on the left side of the grain removal device 5. It is configured to be replenishable. That is, the fuel tank 31 is installed on the traveling machine body 1 at a position below the straw cutter 65 at the rear of the threshing device 5, and the fuel filler port 32 (see FIG. 8) extends to the left side of the threshing device 5. It is possible to refuel from the outside of the machine.

As shown in FIGS. 1 and 2, the cutting frame 51 connected to the cutting rotation fulcrum shaft 4a of the cutting device 3 is a hair clipper type cutting blade device 52 that cuts the root of the uncut grain culm planted in the field. Is provided. In front of the cutting frame 51, a grain culm raising device 53 for 6 rows for raising uncut grain culms planted in the field is arranged. A grain culm transport device 54 for transporting the cut grain culm cut by the cutting blade device 52 is arranged between the grain culm raising device 53 and the front end portion (feed start end side) of the feed chain 6. In addition, in front of the lower part of the grain culm raising device 53, a cursive script 55 for 6 rows for weeding uncut grain culms is projected. The reaping device 3 is configured to continuously mow the uncut culms planted in the field while moving in the field.

Next, the structure of the threshing device 5 will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the threshing device 5 includes a handling cylinder 56 for threshing culms, a swing sorting machine 57 for sorting the degreased material falling below the handling cylinder 56, and a wall insert fan 58. It is provided with a processing cylinder 59 that reprocesses the threshing waste discharged from the rear portion of the cylinder 56, and a dust exhaust fan 60 that discharges the dust exhausted from the rear portion of the swing sorting plate 57. The culms transported from the reaping device 3 by the culm transport device 54 are inherited by the feed chain 6, carried into the threshing device 5, and threshed by the handling cylinder 56.

As shown in FIG. 1, on the lower side of the rocking sorting machine 57, there are two conveyors 61 for taking out the grains (first thing) sorted by the rocking sorting board 57, and grains with branch stems and the like. Second conveyor to take out the number 6
2 and are provided. The rocking sorting board 57 is configured such that the threshing leaked from the receiving net 67 stretched below the handling cylinder 56 is rocked and sorted (specific gravity sorting) by the feed pan 68 and the chaff sheave 69. .. The dust in the grains dropped from the rocking sorting board 57 is removed by the sorting wind from the wall insert fan 58, and the grains fall to the first conveyor 61. The grain taken out from the first conveyor 61 is carried into the grain tank 7 via the fried grain conveyor 63 and collected in the grain tank 7.

Further, as shown in FIG. 1, the rocking sorting board 57 is configured to drop a second product such as a grain with a branch stem from the chaf sheave 69 onto the second conveyor 62 by rocking sorting. It is equipped with a sorting fan 71 that wind-selects the second item that falls below the chaff sheave 69. The dust and straw debris in the grains of the second product that has fallen from the chaff sheave 69 are removed by the sorting wind from the sorting fan 71, and the second product falls on the second conveyor 62. The end portion of the second conveyor 62 is communicated with and connected to the upper surface side of the feed pan 68 via the reduction conveyor 66, and the second product is returned to the upper surface side of the swing sorting plate 67 and re-sorted. There is.

On the other hand, as shown in FIGS. 1 and 2, a straw discharge chain 64 and a straw discharge cutter 65 are arranged on the rear end side (feed end side) of the feed chain 6. The straw (the culm from which the grains have been threshed) inherited from the rear end side of the feed chain 6 to the straw chain 64 is discharged to the rear of the traveling machine 1 in a long state, or is discharged to the rear of the threshing device 5. The straw cutter 65 is provided in the above to cut the straw into short pieces to an appropriate length, and then the straw is discharged downward to the rear of the traveling machine 1.

As shown in FIGS. 4 and 5, the grain tank 7 has a recess 7a for installing a purification device having a shape notched on the left side of the front surface, a recess 7b for installing a grain discharge conveyor having a groove shape in the front-rear direction on the left side of the upper surface, and a left surface surface. It is provided with a recess 7c for installing a grain-raising conveyor in a shape in which a step is provided in the center in the vertical direction. A space is provided behind the engine room 97 in the recess 7a for installing the purification device on the front surface of the grain tank 7, and the exhaust gas purification device 74 is arranged. In the grain discharge conveyor installation recess 7b on the upper surface of the grain tank 7, the grain discharge conveyor 8 whose tip is accommodated in the conveyor support is accommodated along the grain discharge conveyor installation recess 7b. Further, in the recess 7c for installing the frying conveyor on the left side of the grain tank 7, the frying conveyor 63 is fixed along the recess 7c for installing the frying conveyor, and the receiving port provided above the recess 7c for installing the frying conveyor. It is connected by.

As shown in FIGS. 3, 10 and 11, the grain discharge conveyor 8 is rotatably supported on the upper end side of the vertical take-out conveyor (vertical feed conveyor) 8a, and is rotatably supported on the feed end side of the grain discharge conveyor 8. A paddy throwing port 9 is provided at the site. The horizontal feed conveyor 8b is arranged in the front-rear direction at the bottom of the grain tank 7, and the lower end (base end) side of the vertical take-out conveyor 8a is connected to the rear end of the horizontal feed conveyor 8b. Further, a machine outer bottom plate 7a and a machine inner bottom plate (not shown) are provided on the bottom of the grain tank 7, and the machine outer bottom plate 7a and the machine inner bottom plate are inclined toward the lateral feed conveyor 8b so that the grains inside the grain tank 7 are laterally arranged. It flows down in the feed conveyor 8b direction. The lateral feed conveyor 8b extends along the front and rear of the bottom of the grain tank 7, and conveys the grains flowing down along the bottom plate of the grain tank 7 to the rear vertical take-out conveyor 8a.

The vertical take-out conveyor 8a is connected to the rear end of the lateral feed conveyor 8b protruding from the rear end surface of the grain tank 7, and extends upward along the rear end surface of the grain tank 7. The vertical take-out conveyor 8a is erected behind the grain tank 7 by connecting the lower end (base end) side to the lateral feed conveyor 8b and fixing the upper portion to the rear end surface of the grain tank 7. Further, the lower end of the vertical take-out conveyor 8a is supported on the traveling machine body 1 so that the grain tank 7 can be laterally moved toward the outside of the machine around the axis of the vertical take-out conveyor 8a. Is configured to be openable. Further, a rear cover 30 that covers the periphery of the vertical take-out conveyor 8a is detachably provided behind the grain tank 7, and a bottom cover body 165 is detachably provided on the outer surface of the machine outer bottom plate 7a of the grain tank 7.

Next, with reference to FIGS. 4 to 7, the first case 75 (diesel particulate filter, DPF) and the second case 229 (selective catalytic reduction, SCR) as the exhaust gas purification device 74, and the diesel engine 14 Will be described. The first case 75 as a diesel particulate filter (DPF) for removing particulate matter in the exhaust gas of the diesel engine 14 and urea selective catalytic reduction (SCR) for removing nitrogen oxides in the exhaust gas of the diesel engine 1. A second case 229 as a system is provided. As shown in FIG. 5, the oxidation catalyst 79 and the soot filter 80 are internally provided in the first case 75. As shown in FIG. 7, in the second case 229, an SCR catalyst 232 for urea selective catalyst reduction and an oxidation catalyst 233 are provided internally.

Further, the first case 75 has an inlet side case 76 and an outlet side case 77. A diesel oxidation catalyst 79 such as platinum that produces nitrogen dioxide (NO2) is arranged inside the inlet side case 76. Inside the inlet side case 76 and the outlet side case 77, a honeycomb-structured soot filter 80 that continuously oxidizes and removes collected particulate matter (PM) at a relatively low temperature is arranged. In addition to removing particulate matter (PM) in the exhaust gas of the diesel engine 14, the diesel oxidation catalyst 79 and the soot filter 80 arranged in series in the direction of movement of the exhaust gas in the inlet side case 76 and the outlet side case 77 are used. Reduce carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas. On the other hand, the SCR catalyst 232 and the oxidation catalyst 233 are arranged in series in the moving direction of the exhaust gas in the second case 229. The SCR catalyst 232 and the oxidation catalyst 233 in the second case 229 are configured to reduce nitrogen oxides (NOx).

Further, as shown in FIGS. 4 to 7, the first case 75 and the second case 229 have a long cylindrical shape extending in the front-rear direction of the machine body. On both sides of the tubular shape of the first case 75 (one end side and the other end side in the exhaust gas moving direction), a purification inlet pipe 81 for taking in the exhaust gas and a purification outlet pipe 82 for discharging the exhaust gas are provided. Similarly, on both sides of the second case 29 (one end side and the other end side in the exhaust gas moving direction), an SCR inlet pipe 236 for taking in the exhaust gas and an SCR outlet pipe 237 for discharging the exhaust gas are provided.

Further, as shown in FIGS. 4 to 7, a supercharger 118 for forcibly sending air to the diesel engine 14 is arranged at an exhaust gas outlet (exhaust manifold 117) of the diesel engine 14. The purification inlet pipe 81 is communicated with the exhaust gas outlet side of the supercharger 118 via the exhaust connecting pipe 119, and the exhaust gas of the diesel engine 14 is introduced into the first case 75. A urea mixing pipe 239 connecting the SCR inlet pipe 236 is connected to the purification outlet pipe 82, and the exhaust gas is introduced from the first case 75 into the second case 229 via the urea mixing pipe 239. In addition, the exhaust gas outlet side of the turbocharger 118 and the exhaust connecting pipe 119 are connected by a bellows-shaped connecting pipe 98 that can be bent and expanded, and the engine 14 vibration on the supercharger 118 side is connected to the exhaust connecting pipe 119 side. It is configured so that it will not be transmitted to.

On the other hand, the purification outlet pipe 82 and the urea water injection portion 240 of the urea mixing pipe 239 are bolted to and detachably from each other with a pipe flange. The inlet side case 76 and the outlet side case 77 are detachably connected by bolting a plurality of sets of thick plate-shaped intermediate flange bodies 84, and the outlet side case 77 can be separated to perform disassembly maintenance of the soot filter 80. It is configured. Further, the tail pipe 83 is connected to the SCR outlet pipe 237 to open the exhaust gas outlet of the tail pipe 83 toward the upper side of the machine body, and the exhaust gas of the diesel engine 14 (each cylinder) is a supercharger. After being introduced into the first case 75 from 118, moved from the first case 75 to the urea mixing pipe 239, and the urea water in the urea water tank 174 described later is mixed with the exhaust gas, the exhaust gas is mixed with the exhaust gas in the second case. It is installed in the 229 and is configured to be discharged to the outside of the aircraft from the tail pipe 83.

With the above configuration, the particulate matter (PM) contained in the exhaust gas of the diesel engine 14 is collected by the soot filter 80 in the first case 75 and continuously oxidized and removed by nitrogen dioxide (NO2). Will be done. In addition to removing granular substances (PM) in the exhaust gas of the diesel engine 14, the content of carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas of the diesel engine 14 is reduced. Next, inside the urea mixing pipe 239, urea water was injected from the urea water injection nozzle body of the urea water injection unit 240 into the exhaust gas from the diesel engine 14, and the ammonia produced by hydrolysis was mixed. In the exhaust gas in 2 case 229, the content of nitrogen oxide substance (NOx) is reduced by the SCR catalyst 232 and the oxidation catalyst 233 for urea selective catalytic reduction. In the first case 75 and the second case 229, the exhaust gas of the diesel engine 14 is purified and discharged from the tail pipe 83 to the outside of the machine.

Next, as shown in FIGS. 4 and 6, an engine room frame 91 as an airframe frame is erected on the traveling machine 1 in front of the grain tank 7, and the engine room 97 is formed by the engine room frame 91. The diesel engine 14 is mounted on the upper surface side of the traveling machine body 1, and the diesel engine 14 is installed inside the engine room 97. Further, inside the engine room 97, cooling parts such as a water cooling radiator (not shown) and a cooling fan 115 are installed on the side of the diesel engine 14. The cooling fan 115 is configured to take in outside air from the outside on the right side of the combine harvester toward cooling parts such as a radiator (not shown), while discharging warm air from the diesel engine 14 toward the threshing device 5. There is.

Further, the right side, the back side, and the upper surface side of the diesel engine 14 and the cooling parts are surrounded by the engine room frame 91, and the cooling fan 115 of the diesel engine 14 cools the inside of the engine room 97 from the outside on the right side of the engine room frame 91. While taking in outside air, the warm air after cooling the diesel engine 14 and the cooling parts is discharged toward the right side of the grain removal device 5 as a working unit adjacent to the engine room frame 91 (engine room 97). doing.

The engine room frame 91 is a square pipe-shaped horizontal frame 94 in which both ends are integrally fixed to the left square pipe-shaped strut 92, the right inverted U-shaped strut 93, and the left and right strut 92, 93. Has. The square pipe-shaped horizontal frame 94 is fixed by connecting one end to the upper end of the square pipe-shaped strut 92 and connecting the other end to the square pipe-shaped frame 93a fixed above the inverted U-shaped strut 93. ..

Further, rubber pressure welding legs (not shown) provided at the rear of the bottom surface of the operation cabin 10 are brought into contact with the upper surfaces of the left and right pedestals 96 of the horizontal frame 94 from above, and are brought into contact with each pedestal 96 of the horizontal frame 94. The rear part of the driving cabin 10 is supported so as to be detachable in the vertical direction. The diesel engine 14 is installed inside the engine room 97 formed on the bottom surface side of the driving cabin 10 and the engine room frame 91. As shown in FIG. 4, a conveyor support 90 is provided on the upper end side of the left strut 92, and the grain discharge conveyor 8 is supported at the storage position via the conveyor support 90.

Further, an air cleaner 123 that supplies outside air to the diesel engine 14 and a pre-cleaner 124 that takes in outside air into the air cleaner 123 are provided. Of the upper surface of the engine room 97, the air cleaner 123 is arranged on the right side of the exhaust gas purification device 74, the pre-cleaner 124 is arranged on the right side in front of the grain tank 7 and above the engine room 94, and the air supply pipe 125 is arranged in the pre-cleaner 124. The air cleaner 123 is connected via the air cleaner 123. Combustion air is taken into the compressor case 118a of the supercharger 118 of the diesel engine 14 from the pre-cleaner 124 via the air cleaner 123. The air cleaner 123 is located on the front right side of the exhaust gas purification device 74 by being fixed on the rear right side of the lateral frame 94 of the engine room frame 91.

As shown in FIGS. 4 to 6, the supercharger 118 is installed on the upper front side of the diesel engine 14, and a compressor case 118a with a built-in blower foil is provided on the right side thereof, while a turbine having a built-in turbine foil on the left side thereof. A case 118b is provided. Then, the intake intake side provided at the right end of the compressor 118a communicates with the intake / discharge side of the air cleaner 123 via the air supply pipe 120. On the other hand, the exhaust gas outlet pipe 99 installed at the left end of the turbine case 118b passes through the bendable bellows-shaped exhaust gas introduction pipe 98, and the exhaust gas inlet (purification inlet pipe 81) of the exhaust gas purification device 74, which is an aftertreatment device. It is connected to the exhaust connecting pipe 119 connected to.

As shown in FIGS. 3 to 6, the exhaust gas purifying device 74 including the first case 75 and the second case 229, and the air cleaner 123 and the pre-cleaner 124 are distributed to the left and right with respect to the engine 14 on the back surface of the engine room frame 91. Is arranged. That is, with respect to the supercharger 118 on the front surface of the engine 14, the air cleaner 123 and the pre-cleaner 124 that serve as the intake system are arranged on the right side of the compressor case 118a, while the exhaust gas purification that serves as the exhaust system is located on the left side of the turbine case 119b. The device 74 is arranged. Therefore, since the intake path and the exhaust path of the engine 14 including the supercharger 118 are arranged separately on the left and right, the intake path and the exhaust path can be configured as a short path, and the exhaust path through which the high-temperature exhaust gas passes can be configured. The intake paths can be separated from each other.

Next, the mounting structure and the support structure of the exhaust gas purification device 74 will be described with reference to FIGS. 4 to 7. The exhaust gas purification device 74 has a unit configuration in which the first case (DPF) 75 and the second case (SCR) 229 are connected in parallel by a case fixing body 231. On the case fixing body 231, the first case 75 is detachably fixed by a plurality of fastening bands 85, and the second case 229 is detachably fixed by a plurality of fastening bands 230. That is, by bolting both ends of each of the plurality of fastening bands 85 and 230 to the case fixing body 231 so that the first case 75 and the second case 229 are parallel to each other, they are arranged side by side on the case fixing body 231.

The exhaust gas purification device 74 is supported on the traveling machine body 1 by fixing the case fixing body 231 having the first case 75 and the second case 229 mounted on the upper surface to the support base 250. As shown in FIGS. 4 to 7, the support base 250 is arranged below the purification device installation recess 7a provided on the front left side (threshing device 5 side) of the grain tank 7, and the exhaust gas purification device 74 is used as an engine. It is supported from the room 97 to the recess 7a for installing the purification device. As shown in FIGS. 5 to 7, the support base 250 has its left edge fixed on the right side of the machine case frame of the threshing device 5, the front side fixed by the engine room frame 94, and the right edge erected from the traveling machine body 1. By being fixed by the support column frame 251, it is supported at an upper position in the recess 7a of the grain tank 7.

As shown in FIGS. 4 and 6, the front side of the support base 250 is connected to the horizontal frame 94 of the engine room frame 91 by connecting the other end of the cross-linked frame 252 whose one end is fixed on the back surface of the support base 250 to the engine room frame. Supported by 91. Further, as shown in FIG. 5, the left edge of the support base 250 is connected to the right side of the upper surface of the threshing device 5 (the upper frame of the threshing machine on the upper right side of the threshing machine housing) via the assembly adjustment frame 253 to connect the threshing device. It is supported on the right side of 5. Further, as shown in FIG. 7, the right edge of the support base 250 is supported on the support frame 251 by being connected to the upper end of the support frame 251 via the cross rail frame 254.

As shown in FIGS. 4 and 5, the cross-linking frame 252 extends from the support base 250 toward the horizontal frame 94 at a position between the air cleaner 123 and the purification inlet pipe 81. As a result, not only a space for connecting the bellows-shaped exhaust introduction pipe 98 arranged below the horizontal frame 94 and the purification inlet pipe 91 of the first case 75 can be secured, but also buffering with the air cleaner 123 can be prevented. Further, since the bridge frame 252 is arranged at a position between the intake path including the air cleaner 123 and the exhaust path connected to the first case 75, the influence of the exhaust heat from the exhaust path on the air cleaner 123 is reduced. can.

As shown in FIGS. 4 to 7, the grain tank 7 has a recess 7a for installing a purification device on a surface facing the engine room 97, and the recess 7a of the grain tank 7 has a first case 75 and a second case. The exhaust gas purification device 74 by 229 is arranged. As a result, the exhaust gas purifying device 74 can be arranged between the grain tank 7 and the engine room 97 at a position close to the engine 14, but it is possible to prevent the operator from coming into contact with the exhaust gas purifying device 74 which becomes hot. .. Further, since the exhaust heat from the engine room 97 can be guided to the exhaust gas purification device 74, the exhaust gas purification device 74 is arranged in a high temperature environment required for purifying the exhaust gas, and the exhaust gas purification device 74 is expensive. The purification effect can be maintained.

At this time, as shown in FIGS. 4 to 7, the first case 75 and the second case 229 are horizontally supported from the threshing device 5 to the recess 7a of the grain tank 7, and the first case 75 and the second case are supported. 229 are arranged in parallel. By horizontally supporting the first case 75 and the second case 229, the exhaust gas purification device 74 can be compactly arranged at a position higher than the engine 14, and the high-temperature exhaust gas from the engine 14 can be transferred to the exhaust gas purification device 74. The structure can be easily guided. Further, by arranging the exhaust gas purification device 74 at a high position, it is possible to prevent water generated due to dew condensation or the like due to a temperature drop when the engine 14 is stopped from accumulating in the exhaust gas purification device 74.

As shown in FIGS. 4 to 7, the first case 75 and the second case 229 of the exhaust gas purification device 74 are connected in parallel by the case fixing body 231 and a urea mixing pipe is connected to the exhaust outlet of the first case 75. The exhaust inlet of the second case 229 is connected via 239, and the urea mixing pipe 239 is arranged between the first and second cases 75 and 229 in parallel with the first and second cases 75 and 229, respectively. As a result, the first case and the second case and the urea mixing pipe are integrated into a unit structure, and the exhaust gas purification device 74 can be compactly installed inside the recess 7a in front of the grain tank 7. Therefore, while the installation space of the exhaust gas purification device 74 can be easily secured, the recess 7a of the grain tank 7 can be made narrow so that the grain storage capacity of the grain tank 7 can be secured.

The first and second cases 75 and 229 of the exhaust gas purification device 74 are arranged side by side with the longitudinal direction of each of the first and second cases 75 and 229 as the front-rear direction, and the first case 75 is the threshing device 5 It is placed on the side. By arranging the first case 75 on the threshing device 5 side and arranging the second case 229 on the back side of the recess 7a of the grain tank 7, the second case 229 and the urea mixing pipe 239 are covered with the grain tank 7. At the same time, the first case 75 can be arranged at a position close to the exhaust port of the engine 14. Therefore, the exhaust path from the engine 14 to the first case 75 can be configured as a short path, and the regeneration process in the first case 75 can be maintained with high performance. Further, the second case 229 and the urea mixing pipe 239 can be arranged in a high temperature environment surrounded by the grain tank 7 behind the engine room 97 to prevent the urea water from freezing, and at the same time, the purification capacity in the second case 229 is highly enhanced. Can be maintained.

As shown in FIGS. 7 to 12, a urea water tank 174 for storing urea water (urea aqueous solution for selective catalyst reduction) and a urea water supply device 175 for supplying urea water to the urea water injection unit 240 of the urea mixing tube 239 are provided. I have. The urea water supply device 175 supplies the urea water in the urea water tank 174 to the urea water injection section 240 of the urea mixing tube 239, so that the urea water is supplied from the urea water injection valve 178 of the urea water injection section 240 to the urea mixing tube 239. Spray inside.

As shown in FIG. 9, the urea water supply device 175 includes a urea water pump 171 that pumps the urea aqueous solution in the urea water tank 174, and an electric motor 172 for supplying urea water that drives the urea water pump 171. The urea water supply device 175 is connected to the urea water injection valve 178 of the urea injection unit 240 via the urea water injection pipe 177, and the urea water supply pipe 179 and the urea water return pipe 180 are connected to the urea water tank 174. You are connected. Further, it includes an engine controller 181 that executes fuel injection control of the diesel engine 14, and a urea injection controller 182 that controls a urea water supply device 175 or a urea water injection valve 178.

Then, a urea water injection valve 178 is attached to the urea injection section 240 of the urea mixing tube 239, and the urea aqueous solution is sprayed into the inside of the urea mixing tube 239 from the urea water injection valve 178. The urea water supplied into the urea mixing pipe 239 is configured to be mixed as ammonia in the exhaust gas from the first case 75 to the second case 229. The urea water temperature sensor 183 of the urea water tank 174 and the urea water amount sensor 184 of the urea water tank 174 are connected to the urea injection controller 182, and the engine controller 181 and the urea injection controller 182 are connected to the diesel engine 14. The urea water is configured to be supplied into the urea mixing tube 239 at an appropriate time according to the operating condition and the like.

First, the mounting structure of the urea water supply device 175 will be described. As shown in FIGS. 7 and 8, the urea water supply device 175 is arranged between the threshing device 5 and the grain tank 7 at a height position lower than the exhaust gas purification device 74. That is, the urea water supply device 175 is fixed at a position lower than the urea water injection valve 178. Therefore, after the urea water injection is stopped, the urea water remaining in the urea water injection pipe 177 or the like may be returned to the urea water supply device 175 due to the height difference between the urea water supply device 175 and the urea water injection valve 178. can.

As shown in FIGS. 10 and 12, an exhaust gas purification device 74 is installed between the grain removal device 5 and the grain tank 7 behind the engine room 97, and a urea water supply device that supplies urea water to the exhaust gas purification device 74. 175 is provided below the exhaust gas purification device 74. Therefore, since the exhaust gas purification device 74 and the urea water supply device 175 can be arranged behind the engine room 97, it is possible to prevent the urea water from freezing by utilizing the exhaust heat from the engine 14, and it is possible to suppress the deterioration of the quality of the urea water.

Further, as shown in FIGS. 10 and 12, the exhaust gas purification device 74 is arranged at a position sandwiched between the engine room 97 and the grain tank 7 in the front-rear direction, and is sandwiched between the grain tank 7 and the threshing device 5. A urea water supply device 175 is arranged in the room. By effectively utilizing the space around the grain tank 7 and arranging the exhaust gas purification device 74 and the urea water supply device 175, the capacity of the grain tank 7 can be secured. Further, since the exhaust gas purification device 74 and the urea water supply device 175 can be arranged at a short distance, the urea water pipe (urea water injection pipe 177) connecting the exhaust gas purification device 74 and the urea water supply device 175 is shortened. Can be configured.

As shown in FIGS. 7 and 8, the urea water supply device 175 is fixed to the area on the right side (grain tank 7 side) of the threshing device 5 and sandwiched between the grain raising conveyor 63 and the reduction conveyor 66. .. As a result, the urea water supply device 175 can be arranged in the vicinity of the exhaust gas purification device 74 located in front of the grain tank 7 adjacent to the grain removal device 5, so that the urea water pipe connecting the urea water tank 174 to the urea water injection unit 240 is connected. (Urea water injection pipe 177) can be constructed to be short. Further, the exhaust gas purification device 74 and the urea water supply device 175 can be arranged in the flow path of the exhaust heat air configured between the threshing device 5 and the grain tank 7 behind the engine room 97. Therefore, the SCR system can be operated in an optimum temperature environment, such as preventing freezing of urea water.

In the present embodiment, as shown in FIGS. 7 and 8, the urea water supply device 175 is fixed at a position on the front side of the grain raising conveyor 63 and on the lower side of the reduction conveyor 66. That is, the urea water supply device 175 is fixed to the right side surface of the threshing device 5, and is arranged at a position below the reduction conveyor 66 and between the wall insert fan 58 and the first conveyor 61. That is, the urea water supply device 175 is arranged at a position surrounded by the grain raising conveyor 63 and the reduction conveyor 66 intersecting each other and the cover body 58a covering the right suction port of the wall insert fan 58.

On the other hand, the grain tank 7 is installed with the grain raising conveyor 63 and the reduction conveyor 66 without any buffer. Therefore, by arranging the urea water supply device 175 in the area surrounded by the grain raising conveyor 63 and the reduction conveyor 66, the urea water supply device 175 can be fixed to the grain tank 7 and the side surface of the threshing device 5 without buffering, and the grain tank 7 can be fixed. It is not necessary to change the shape of the grain tank 7, and the capacity of the grain tank 7 can be secured.

Next, with reference to FIG. 8, a modified example of the installation position of the urea water supply device 175 arranged in the region sandwiched between the grain raising conveyor 63 and the reduction conveyor 66 will be described. As shown in FIG. 8, the urea water supply device 175 may be installed at a position in front of the grain raising conveyor 63 and below the reduction conveyor 66, and may be installed at a position below the reduction conveyor 66, as shown by a virtual line, with the discharge port of the grain raising conveyor 63. By arranging it at the same height position, it is arranged at a height position lower than the exhaust gas purification device 74.

Further, as shown by the virtual line in FIG. 8, the urea water supply device 175 may be installed on the rear side of the grain raising conveyor 63 and above or below the reduction conveyor 66. Further, when the threshing conveyor 63 and the reduction conveyor 66 are arranged side by side on the right side surface of the threshing device 5 without crossing each other, the urea water supply device 175 is provided between the threshing conveyor 63 and the reduction conveyor 66. It may be installed.

Next, the mounting structure of the urea water tank 174 will be described with reference to FIGS. 10 to 12. As shown in FIGS. 10 to 12, the urea water tank 174 is arranged behind the grain tank 7, while the fuel tank 31 is arranged behind the threshing device. The fuel filler port 32 of the fuel tank 31 is projected toward the left side, while the water supply port 174a of the urea water tank 174 is projected toward the right side. Specifically, the urea water tank 174 is provided with a water supply port 174a from the outside of the machine toward the rear (diagonally to the right rear), and is vertically arranged between the vertical take-out conveyor 8a and the rear cover 30. The water supply port 174a protrudes from an opening (not shown) of the rear cover 30, and is configured so that the water supply port can be accessed from outside the machine with respect to the water supply port 174a.

As shown in FIGS. 10 to 12, the urea water tank 174 is arranged vertically with its longitudinal direction in the vertical direction, and is fixed to the lower side of the right edge (outer edge of the machine) of the rear end surface of the grain tank 7. NS. Then, when the fuel tank 31 is refueled or the urea water tank 174 is refueled in order to project the water supply port 174a toward the right side opposite to the refueling port 32 facing the left side of the traveling machine body 1. In addition, it is possible to prevent erroneous determination between the refueling port 32 and the water supply port 174a. Further, since the water supply port 174a projects diagonally rearward, the amount of wraparound of the water supply hose from the fuel supply port 32 to the water supply port 174a can be reduced, and the refueling work and the water supply work can be performed at the same time.

As shown in FIGS. 10 and 11, the urea water tank 174 is vertically arranged around the vertical take-out conveyor (longitudinal feed conveyor) 8a behind the grain tank 7. The urea water tank 174 is arranged inside the rear cover 30, and is arranged in parallel with the vertical take-out conveyor 8a. As shown in FIGS. 10 and 12, the urea water tank 174 is connected to the grain tank 7 via the urea water supply pipe 179 and the urea water return pipe 180 that are piped between the grain removal device 5 and the grain tank 7. It is connected to the urea water supply device 175 arranged on the left side of the. That is, since the exhaust gas purification device 74, the urea water supply device 175, and the urea water tank can be arranged by utilizing the space around the grain tank 7, the capacity of the grain tank 7 can be secured.

As shown in FIGS. 10 and 12, the exhaust gas purification device 74 is arranged in the vicinity of the front of the grain tank 7, the urea water supply device 175 is arranged on the side of the grain tank 7, and the urea water tank 174 is arranged in the grain tank 7. It is placed at the rear. That is, since the urea water supply device 175 is arranged between the exhaust gas purification device 74 and the urea water tank 174, the urea water pipes 177, 179, 180 from the urea water tank 174 to the exhaust gas purification device 74 can be configured in a short length. ..

As shown in FIG. 12, the grain tank 7 is configured such that the rear portion of the grain tank 7 is supported on the vertical take-out conveyor 8a and can be laterally moved toward the outside of the machine around the vertical take-out conveyor 8a axis. By rotating the grain tank 7 vertically around the vertical rotation axis of the vertical take-out conveyor 8a toward the outside of the machine, the right side surface of the threshing device 5 and the rear surface of the engine room 97 can be opened. Since the urea water tank 174 is installed around the vertical take-out conveyor 8a, the connection portion between the urea water supply pipe 179 and the urea water return pipe 180 can be arranged near the rotation fulcrum of the grain tank 7. Then, the urea water supply pipe 179 and the urea water return pipe 180 are piped so as to bypass the back surface from the left side surface of the grain tank 7. Therefore, when the grain tank 7 is opened, the piping distance from the urea water tank 174 to the urea water supply device 175 is shorter than when the grain tank 7 is stored, and the difference in piping distance can be reduced by opening and closing the grain tank 7.

Further, when the grain tank 7 is opened by lateral movement, the exhaust gas purification device 74 and the urea water supply device 175 behind the engine room 97 can be easily accessed, while the exhaust gas when the grain tank 7 is stored is exhaust gas. The purification device 74 and the urea water supply device 175 become inaccessible. Therefore, when the grain tank 7 is stored, it becomes impossible to contact the exhaust gas purification device 74 or the like which becomes hot during operation, so that the safety of the operator can be ensured and the grain tank 7 is used in various operations such as maintenance. The exhaust gas purification device 74 and the urea water supply device 175 can be easily accessed by opening.

<Second embodiment>
Next, a second embodiment embodying the present invention will be described with reference to FIGS. 13 to 16. In the combine in the present embodiment, unlike the first embodiment, the urea water tank 174 behind the grain tank 7 is arranged horizontally under the grain tank 7. Since other configurations are the same as those of the combine in the first embodiment, detailed description thereof will be omitted, and the configuration relating to the urea water tank 174 will be described below.

In the combine in the present embodiment, as shown in FIG. 13, the exhaust gas purification device 74 is arranged around the front of the grain tank 7, the urea water supply device 175 is arranged on the side of the grain tank 7, and the urea water tank 174 is arranged. It is arranged behind the grain tank 7. Further, by arranging the fuel tank 31 and the urea water tank 174 separately on the left and right behind the traveling machine body 2, the fuel and urea water supply ports 32 and 174a can be easily identified.

As shown in FIGS. 13 to 15, the urea water tank 174 is fixed to the bottom plate of the grain tank 7 in a horizontal arrangement, and its rear end portion is projected rearward from the grain tank 7. That is, the rear end portion of the urea water tank 7 is arranged in the vicinity of the connecting portion between the vertical take-out conveyor 8a and the horizontal feed conveyor 87b. The rear end portion of the urea water tank 174 is arranged on the left side of the grain tank 7 via the urea water supply pipe 179 and the urea water return pipe 180 that are piped between the grain removal device 5 and the grain tank 7. It is connected to the urea water supply device 175.

As shown in FIGS. 14 and 15, a tank support 173 is provided on the outer surface of the machine outer bottom plate 7a of the grain tank 7, and a urea water tank 174 is provided on the outer surface of the machine outer bottom plate 7a of the grain tank 7 via the tank support 173. Make them support. A bottom cover body 165 is detachably provided on the outer surface of the machine outer bottom plate 7a of the grain tank 7, and a urea water tank 174 is arranged inside the machine of the bottom cover body 165. On the right side surface of the urea water tank 174, the water supply port 174a is arranged so as to face the right side (outside the machine). At this time, by providing an opening in the rear cover 30 and projecting the water supply port 174a of the urea water tank 174 toward the outside of the machine, the water supply work can be easily performed from the outside of the machine.

As shown in FIG. 15, the rear end portion of the urea water tank 174 connected to the urea water supply pipe 179 and the urea water return pipe 180 is arranged near the rotation fulcrum of the grain tank 7. The rear end portion of the urea water tank 174 is arranged on the left side of the grain tank 7 via the urea water supply pipe 179 and the urea water return pipe 180 that are piped between the grain removal device 5 and the grain tank 7. It is connected to the urea water supply device 175. Therefore, when the grain tank 7 is opened, the piping distance from the urea water tank 174 to the urea water supply device 175 is shorter than when the grain tank 7 is stored, and the difference in piping distance can be reduced by opening and closing the grain tank 7.

As shown in FIG. 16, the urea water supply device 175 is arranged between the threshing device 5 and the grain tank 7 at a height position lower than the exhaust gas purification device 74. Further, the urea water supply device 175 is arranged at a position higher than the urea water tank 174 so as to be offset in the front-rear direction (or the left-right direction). That is, the urea water supply device 175 is fixed at a position higher than the urea water tank 174 and at a position lower than the urea water injection valve 178.

By arranging the urea water injection valve 178 at a position higher than the urea water supply device 175, after the urea water injection is stopped, the residual urea water is removed due to the height difference between the urea water supply device 175 and the urea water injection valve 178. , Can be refluxed to the urea water supply device 175. Similarly, by arranging the urea water supply device 175 at a position higher than the urea water pump 174, the residual urea water remains due to the height difference between the urea water tank 174 and the urea water supply device 175 after the injection of the urea water is stopped. Can be refluxed to the urea water tank 174. Therefore, as shown in FIG. 16, by arranging the urea water supply device 175 at a height position between the exhaust gas purification device 74 and the urea water tank 174, the urea water supply device 175 circulates after the engine is stopped. The urea water can be returned to the urea water tank 174, and the urea water return pipe 180 can be omitted.

<Third embodiment>
Next, a third embodiment embodying the present invention will be described with reference to FIGS. 17 and 18. In the combine in the present embodiment, unlike the first and second embodiments, the urea water tank 174 is arranged in the space below the threshing device 5. Since other configurations are the same as those of the combine in the first and second embodiments, detailed description thereof will be omitted, and the configuration relating to the urea water tank 174 will be described below.

As shown in FIGS. 17 and 18, a urea water tank 174 is arranged in the lower part of the machine frame 36 constituting the frame of the threshing device 5. The urea water tank 174 can be installed compactly by utilizing the space under the grain remover frame 36, and the urea water tank 174 is formed to have a large capacity during maintenance work such as around the grain tank 7 or around the engine 14. , Urea water tank 174 can be configured to be replenished with urea water.

As shown in FIGS. 17 and 18, the urea water supply device 175 is arranged on the right side surface (grain tank 7 side) of the grain removal device 5, and the piping route connecting the urea water tank 174 and the urea water supply device 175 ( The urea water supply pipe 179 and the urea water return pipe 180) can be made short. Therefore, the piping path from the exhaust gas purification device 74 to the urea water tank 174 can be shortened, the pumping of urea water in each of the pipes 177, 179, 180 can be facilitated, and the urea water based on recrystallization or freezing can be facilitated. Quality deterioration can be suppressed. Since the exhaust gas purification device 74 is arranged between the grain removal device 5 and the grain tank 7, the space around the grain removal device 5 is utilized to utilize the exhaust gas purification device 74, the urea water supply device 175, and the urea water. The tank 174 can be arranged compactly, and the maintainability and assembling property of the SCR system can be improved.

Further, the urea water supply device 175 is fixed at a position higher than the urea water tank 174 and at a position lower than the exhaust gas purification device 74. Therefore, after the injection of the urea water is stopped, the residual urea water can be returned to the urea water tank 174 due to the height difference between the urea water tank 174 and the urea water supply device 175. Therefore, after the engine is stopped, the urea water can be returned to the urea water tank 174 without being circulated by the urea water supply device 175, and the urea water return pipe 180 can be omitted.

As shown in FIGS. 17 and 18, in the present embodiment, the urea water tank 174 is arranged on the lower surface side of the wall insert 37 in the lower part of the threshing machine frame 36. That is, by installing the urea water tank 174 at a position between the wall insert fan 58 and the first conveyor 61, the urea water tank 174 is placed below the urea water supply device 175 and at a position offset in the left-right direction. Can be placed.

As shown in FIGS. 17 and 18, the urea water supply pipe 179 and the urea water return pipe 180 connected to the urea water tank 174 are along the right side of the threshing device 5 vertically and along the lower side of the threshing machine frame 36. In this way, it can be piped short. Further, the urea water tank 174 can be arranged in the vicinity of the Karami fan 56 that induces the exhaust heat from the engine 14, and by utilizing the exhaust heat from the engine 14, it is possible to prevent the urea water from freezing and recrystallizing.

Next, with reference to FIG. 18, a modified example of the installation position of the urea water tank 174 arranged under the threshing machine frame 36 will be described. As shown in the virtual line of FIG. 18, the urea water tank 174 may be installed on the lower surface side of the first gutter 38 or the second gutter 39. That is, the urea water tank 174 may be arranged at a position between the first conveyor 61 and the sorting fan 71, or the urea water tank 174 may be arranged at a position behind the second conveyor 62. As a result, the urea water tank 174 can be compactly installed by utilizing the space under the threshing machine frame 36.

<Fourth Embodiment>
Next, a fourth embodiment embodying the present invention will be described with reference to FIGS. 19 to 21. In the combine in the present embodiment, unlike the third embodiment, the urea water tank 174 is arranged in the lateral space of the threshing device 5. Since other configurations are the same as those of the combine in the third embodiment, detailed description thereof will be omitted, and the configuration relating to the urea water tank 174 will be described below.

As shown in FIGS. 19 and 20, a urea water tank 174 for storing urea water is arranged inside the side cover 41 that covers the left side of the threshing device 5. The urea water tank 174 can be installed compactly by utilizing the space inside the side cover 51, and the piping route (urea) connecting the urea water supply device 175 arranged on the right side surface (grain tank 7 side) of the grain removal device 5 is used. The water supply pipe 179 and the urea water return pipe 180) can be made short.

As shown in FIGS. 19 and 20, the urea water tank 174 is arranged on the left side of the fuel tank 31 on the inside of the side cover 41. The urea water tank 174 is configured in an L shape that covers the left side surface of the fuel tank 31 from the lower side to the rear side. The urea water tank 174 is configured to surround the lower side and the rear side of the fuel filler port 32 projecting from the upper left side surface of the fuel tank 31 toward the outer side (left side) of the machine.

The urea water tank 174 is provided on the left side of the fuel tank 31 in the front-rear direction, and has a shape in which a rear portion thereof is projected upward. The urea water tank 174 has a water supply port 174a projecting from the rearward protruding portion upward toward the outside (left side) of the machine. By configuring the urea water tank 174 in this way, the urea water tank 174 can be compactly installed by utilizing the installation space of the fuel tank 31, and the fuel filler port (fuel supply unit) 32 and the water supply port (urea water supply unit) can be installed compactly. ) 174a can be arranged close to each other, and the replenishment workability can be improved.

Further, in the present embodiment, as in the modified example shown in FIG. 21, the urea water tank 174 may be integrally formed with the side cover. In the modified example shown in FIG. 21, the urea water tank 174 is provided with a tank portion 174c for storing urea water on the back side (fuel tank 31 side) of the side cover portion 174b that covers the entire left side surface of the fuel tank 31, while the side cover. A water supply port 174a that communicates with the tank portion 174c is provided on the front side of the portion 174b. Further, an opening 174d is provided in the non-installed region of the tank portion 174c of the side cover portion 174b, and the fuel filler port 32 of the fuel tank 31 is inserted through the opening 174d.

At this time, the urea water tank 174 with an integrated side cover can be removed by making the connection portion between the tank portion 174c, the urea water supply pipe 179, and the urea water return pipe 180 detachable with a quick coupler or the like. .. As a result, by removing the urea water tank 174, work such as maintenance and cleaning around the fuel tank 31 becomes easy, and by removing and storing the urea water tank 174, the urea water can be stored under the optimum temperature environment. Can be managed.

<Fifth Embodiment>
Next, a fifth embodiment embodying the present invention will be described with reference to FIGS. 22 to 29. In the combine in the present embodiment, unlike the third embodiment, the urea water tank 174 behind the grain tank 7 is arranged so as to overlap the fuel tank 31. Since other configurations are the same as those of the combine in the third embodiment, detailed description thereof will be omitted, and the configuration relating to the urea water tank 174 will be described below.

As shown in FIGS. 22 and 23, the urea water tank 174 is placed on the lower side of the threshing device 5 so as to overlap the fuel tank 31, and the water supply port 174a of the urea water tank 174 and the fuel filler port 32 of the fuel tank 31 are placed on the threshing device 5. It is projected toward the outside of the aircraft. As a result, the supply ports (fuel supply port 32 and water supply port 174a) of the fuel tank 31 and the urea water tank 174 can be arranged at positions close to each other, so that the burden on the refueling and water supply operations can be reduced.

As shown in FIGS. 22 and 23, urea water is stored in the rear lower part of the machine frame 36 (second gutter 39) and the swing sorting plate 57, which are behind the threshing device 5 and constitute the frame of the threshing device 5. The urea water tank 174 is arranged so as to overlap the fuel tank 31. Further, the urea water tank 174 and the fuel tank 31 are arranged vertically on the inside of the side cover 41 covering the left side of the threshing device 5, and the fuel filler port 32 and the water supply port 174a are located outside the machine from the opening of the side cover 41. It is projected to. As a result, the urea water tank 174 can be compactly installed by utilizing the space behind the grain removal device 5, and the piping route connecting the urea water supply device 175 arranged on the right side surface (grain tank 7 side) of the grain removal device 5 is connected. (Urea water supply pipe 179 and urea water return pipe 180) can be constructed in a short length.

As shown in FIGS. 22 and 23, the upper part of the fuel tank 31 has a tapered shape (the front-rear width becomes narrower toward the upper side), and the urea water tank 174 is formed into a substantially inverted U-shape. By forming the urea water tank 174 so as to match the upper surface of the fuel tank 31, the upper surface of the fuel tank 31 is covered with the lower surface of the urea water tank 174, and the urea water tank 174 is installed on the fuel tank 31. Further, the urea water tank 174 is mounted on the fuel tank 31 so as to hold the fuel tank 31 back and forth, and the urea water tank 174 is fixed on the fuel tank 31.

The urea water tank 174 is configured to be removable from the fuel tank 31. At this time, the urea water tank 174 may be detachably configured by sliding the urea water tank 174 in the left-right direction with respect to the fuel tank 31, or the urea water tank 174 may be vertically attached to the fuel tank 31. It may be fitted or detached. At this time, the connection portion between the urea water tank 174, the urea water supply pipe 179, and the urea water return pipe 180 is made detachable with a quick coupler or the like. By configuring the urea water tank 174 so as to be separable from the fuel tank 31 in this way, not only can water be easily supplied by replacing the urea water tank 174, but also the urea water tank 174 can be removed and stored after the work is completed. Can prevent quality deterioration.

Next, with reference to FIGS. 24 to 26, a first modification of the present embodiment will be described below. In this modification, as shown in FIGS. 24 to 26, the urea water tank 174 is arranged below the fuel tank 31, and the urea water tank 174 is arranged so as to be surrounded by the fuel tank. When the fuel tank 31 surrounds the urea water tank 174, the fuel tank 31 functions as a heat insulating layer, the heat retention effect in the urea water tank 174 can be improved, and the deterioration of the urea water stored in the urea water tank 174 is deteriorated. Can be suppressed.

In the first modification, as shown in FIGS. 25 and 26, a notch 31a is provided on the lower side of the left side surface (side surface provided with the fuel filler port 32) of the fuel tank 31, and the urea water tank 174 is fitted in the notch 31a. match. The urea water tank 174 has a shape that conforms to the notch 31a of the fuel tank 31, so that it is arranged on the lower left side of the fuel tank 31. The right side is covered.

Further, as shown in FIG. 25, the fuel tank 31 is fixed to the traveling machine body 1 by a tank support (support belt) 33. At this time, the fuel tank 31 is fixed by the tank support 33 at a position overlapping the storage position (notch 31a forming position) of the urea water tank 174, so that the urea water tank 174 is also moved by the tank support 33. Can be supported and fixed to 1. Further, since the tank support 33 is installed so that the tank support 33 hangs on the left end of the urea water tank 174, the urea water tank 174 can be moved from the fuel tank 31 without removing the tank support 33. Can be separated.

Next, with reference to FIGS. 27 to 29, a second modification of the present embodiment will be described below. In this modification, as shown in FIGS. 27 to 29, the urea water tank 174 is arranged on the lower side of the fuel tank 31, the urea water tank 174 is arranged so as to be surrounded by the fuel tank, and then the urea water tank. The 174 has a shape having a convex portion 174x projecting above the water supply port 174a. By providing the convex portion 174x extending above the water supply port 174, it is possible to secure a space in which the urea water is not filled in a part of the convex portion 174x. Therefore, even when the urea water in the urea water tank 174 is frozen, it is prevented that the volume of the urea water in the urea water tank 174 exceeds the volume of the urea water tank 174, and the urea water tank 174 is prevented from being damaged. can.

In the second modification, as shown in FIGS. 27 to 29, the left end portion of the urea water tank 174 is formed to protrude toward the outside (left side) of the machine from the left end portion of the fuel tank 31. That is, when the urea water tank 174 is fitted into the notch 31a of the fuel tank 31, the left side surface of the urea water tank 174 is located on the left side of the left side surface of the fuel tank 31. Then, at the left end of the urea water tank 174, a convex portion 174x projecting above the water supply port 174a is provided at a position offset from the fuel supply port 32 of the fuel tank 31, and is provided on the upper surface of the convex portion 174x. Is provided with a breather 174y so that outside air can be taken in.

As shown in FIGS. 28 and 29, the breather 174y is provided at a position higher than the water supply port 174a, so that even if urea water is supplied to the urea water tank 174, the convex portion 174x does not become full. The upper portion of the convex portion 174x is always filled with air through the breather 174y. Therefore, even when the urea water in the urea water tank 174 freezes, the volume increase of the frozen urea water can be accommodated in the space above the convex portion 174x and exceeds the volume of the urea water tank 174. Therefore, damage to the urea water tank 174 can be prevented.

5 Threshing device 7 Grain tank 10 Operating cabin 31 Fuel tank 14 Diesel engine 74 Exhaust gas purification device 75 First case 81 Purification inlet pipe (exhaust gas intake port)
82 Purification outlet pipe (exhaust gas outlet)
83 Tail pipe 97 Engine room 91 Engine room frame 92 Left strut body (rear side frame)
94 Horizontal frame (back side frame)
97 Engine room 174 Urea water tank 175 Urea water supply device 229 Second case 236 SCR inlet pipe (exhaust gas intake)
237 SCR outlet pipe (exhaust gas outlet)
239 Urea mixing tube

Claims (3)

The engine, which is the power source mounted on the traveling aircraft,
An exhaust gas purification device including a first case for removing particulate matter in the exhaust gas of the engine and a second case for removing nitrogen oxidizing substances in the exhaust gas of the engine.
The engine room in which the engine is installed and
A threshing device that threshes grains,
In a combine that is behind the engine room and has a grain tank that carries in grains that have been threshed by the threshing device.
The exhaust gas purification device is arranged in a recess of the grain tank facing the engine room, and an exhaust connecting pipe connecting the engine and the exhaust gas purification device is provided below the frame forming the engine room. It is arranged so that the exhaust connecting pipe is communicated with the inlet pipe provided in the exhaust gas purification device.
combine. The first case and the second case are arranged so that their respective longitudinal directions are along the front and rear of the traveling direction of the traveling machine body, and the inlet pipe is provided at a position facing the engine in the first case. Has been
The combine according to claim 1. The inlet pipe is arranged on the lower surface side of the first case.
The combine according to claim 2.

Images