KR102057380B1 - combine - Google Patents

Abstract

It is an object of the present invention to provide a combine that enables the exhaust gas purification device to be compactly installed. The combine of the present invention is a nitrogen oxide material in the exhaust gas of the engine 14 and the engine 14 driving the mowing device 3, the threshing device 5, the mowing device 3 or the threshing device 5. And an exhaust gas purification device 74 for removing the oil, an engine room 97 for embedding the engine 14, and a grain tank 7 for carrying in the harvested grains. The exhaust gas purification device 74 is installed behind the engine room 97, and the urea water supply device 175 that supplies urea water to the exhaust gas purification device 74 is lower than the exhaust gas purification device 74. Install on.

Description

combine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester for harvesting grains by collecting grains placed on a package, or a combine harvester for harvesting grains for harvest and collecting grains as feed, and more specifically, to particulates contained in exhaust gases such as diesel engines. A combine with an exhaust gas purification device for removing a substance (soot, particulate) or nitrogen oxides (NOx) contained in the exhaust gas.

Conventionally, a case (hereinafter referred to as DPF case) with a diesel particulate filter and a case with a urea selective reduction catalyst (hereinafter referred to as DPF case) as an exhaust gas purification device (post-treatment device) in an exhaust path of a diesel engine (hereinafter, The technique which installs an SCR case, introduces exhaust gas into a DPF case and an SCR case, and purifies the exhaust gas discharged from a diesel engine is known (for example, refer patent documents 1-3). Moreover, the conventional combine is a structure which cut | disconnects the uncut grain stem of a package by a blade blade apparatus, conveys the harvested grain stem with a threshing apparatus with a grain stem conveyance apparatus, and threshes it, and collects a grain in a grain tank, and an engine is connected to a traveling body It was mounted, and the DPF case was arrange | positioned in the horizontal attitude on the engine upper surface side, and was comprised so that exhaust gas may be discharged from an engine toward a DPF case (for example, refer patent document 4).

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

According to the above-mentioned conventional technology, in the structure in which the engine and the exhaust gas purification device (DPF case) are installed in the engine room in close proximity, it is necessary to secure an installation space of the exhaust gas purification device (SCR case) around the engine attachment portion. Or there is a problem that the volume of the exhaust gas purification device (DPF case or SCR case) is limited. In addition, in the structure of supporting the exhaust gas purification device (DPF case or SCR case) outside the engine room, the attachment position of the urea mixing pipe or exhaust gas purification device for connecting the SCR case to the DPF case is limited, and the exhaust gas purification device is limited. There is a problem such as not being able to simplify the attachment structure. In addition, in a structure in which an exhaust gas purification device (DPF case or SCR case) is provided in a traveling gas at a position away from the engine, such as a lorry, the space for installing the exhaust gas purification device can be easily secured. There is a defect that the exhaust gas temperature in the interior tends to drop below a predetermined temperature.

In addition, when the exhaust gas purification apparatus includes a urea selective reduction catalyst, an urea mixing chamber for mixing urea water with the exhaust gas is provided in the exhaust gas purification apparatus, and it is necessary to supply urea water to the urea mixing chamber. There is. Therefore, when an exhaust gas purification device having a urea selective reduction catalyst is provided, the urea tank for storing urea water to be supplied to the urea mixing chamber as well as the exhaust gas purification device, or the urea water of the urea water tank is an exhaust gas purification device. A urea water pump or the like to be supplied must also be installed. Therefore, even if the installation space of the exhaust gas purification device is secured, it is not enough, and the installation place of the urea water tank and the urea water pump is also required. In addition, under low temperature environments, urea water may be frozen, and not only the exhaust gas purifying process does not function due to freezing of urea water, but also there is a concern that the purification ability may decrease due to a change in the concentration of urea water.

Thus, the present invention seeks to provide a combine that has been improved by examining their current state.

In order to achieve the above object, the present invention provides a mowing device, a threshing device, an engine for driving the mowing device or the threshing device, an exhaust gas purifying device for removing nitrogen oxides in the exhaust gas of the engine, A combine having an engine room in which an engine is built and a grain tank for carrying in harvested grains, wherein the exhaust gas purification device is installed at the rear of the engine room, and the urea water is supplied to the exhaust gas purification device. The urea water supply device is provided below the exhaust gas purification device.

In the combine, the exhaust gas purifying device is disposed at a position sandwiched by the engine room and the grain tank before and after, and the urea water supply apparatus is disposed at a position sandwiched by the grain tank and the threshing apparatus. Does not matter. Moreover, the grain-conveyor which conveys the 1st sorted by the threshing apparatus to the said grain tank, and the reduction conveyor conveyed to the sorting part of the threshing apparatus to reselect the 2nd sorted by the threshing apparatus. The urea water supply device may be provided on the side of the threshing apparatus, in the region sandwiched by the grain grain conveyor and the reduction conveyor.

In the combine, the grain tank is pivotally supported from the rear to be rotatable outside the gas, and a urea water tank for storing urea water is disposed behind the grain tank, and a fuel tank for storing fuel is provided in the threshing apparatus. You may arrange | position rearward.

In the said combine, you may arrange | position the urea water tank which stores urea water in the lower part of the gas frame of the said threshing apparatus. Moreover, you may arrange | position the urea water tank which stores urea water inside the side cover inside which covers the side of a threshing apparatus.

In the combine, the urea water tank for storing urea water is disposed under the threshing apparatus by overlapping with the fuel tank, and the water supply port of the urea water tank and the oil supply port of the fuel tank are projected toward the outside of the threshing device. Does not matter.

In the combine, the exhaust gas purification device is configured with a first case for removing particulate matter in exhaust gas of the engine and a second case for removing nitrogen oxide material in exhaust gas of the engine, and the grain tank May have a recessed part on the surface facing the said engine room, and may arrange | position the said 1st case and the 2nd case in the recessed part of the said grain tank.

In the said combine, you may make the said 1st and 2nd cases parallel with each other in the longitudinal direction of each of the said 1st and 2nd cases in the front-back direction. Further, in the combine, an exhaust inlet of the second case is connected to an exhaust outlet of the first case through an urea mixing pipe, and is parallel to each of the first and second cases between the first and second cases. It does not matter as arrange | positioning the said urea mixing tube so that it may be.

Moreover, in the said combine, it has a fixing member which integrally fixes the said 1st case and the said 2nd case connected in parallel shape, and supports the said fixing member with the support frame installed from the traveling body, and the said exhaust The gas purification device may be fixed. The fixing frame may be supported by the support frame, the engine frame, and the threshing apparatus upper surface to fix the exhaust gas purifying apparatus.

According to the present invention, since the exhaust gas purification device is disposed at the rear of the engine room, the exhaust gas purification device can be disposed at a position close to the engine, and the operator can prevent the operator from coming into contact with the exhaust gas purification device becoming a high temperature. Can be. In addition, since the arrangement from the engine room can be guided to the exhaust gas purification apparatus, the exhaust gas purification apparatus can be disposed under the high temperature environment required for the purification of the exhaust gas, thereby maintaining a high purification effect in the exhaust gas purification apparatus. have

According to the present invention, since the urea water supply device is disposed at a position lower than the exhaust gas purifying device, the urea water tank can be refluxed through the urea water supply device without circulating the urea water after the engine is stopped. Therefore, it is possible to prevent the urea water from remaining in the urea water supply path or the exhaust gas purifying device after crystallization and to crystallize, thereby reducing the deterioration of the purifying capacity of the exhaust gas purifying device and the deterioration of the device.

According to the present invention, the capacity of the grain tank can be secured by arranging the exhaust gas purification device, the urea water supply device, and the urea water tank effectively using the space around the grain tank. In addition, since the urea water supply device can be disposed in the vicinity of the exhaust gas purification device, the urea water pipe connecting the urea water supply device and the exhaust gas purification device can be configured to be short, so that residual water in the piping can be maintained. It can suppress and crystallization of urea water etc. can be prevented beforehand.

According to the present invention, since the urea water supply device is disposed in the region sandwiched by the grain grain conveyor and the reduction conveyor on the side of the threshing device, it is not necessary to change the shape of the grain tank in order to secure the space of the urea water supply device. Therefore, not only the capacity of the grain tank can be secured but also the shape of the grain tank is not complicated, and the design thereof is facilitated.

According to the present invention, since the urea water supply device is disposed between the exhaust gas purification device and the urea water tank, the urea water pipe from the urea water tank to the exhaust gas purification device can be constructed in short. In addition, by disposing the fuel tank and the urea water tank behind the traveling body, the supply ports for the fuel and the urea water can be easily identified. In addition, by disposing the urea water tank near the rotational shaft of the grain tank, the difference in the piping distance based on the opening and closing of the grain tank can be reduced, so that the urea water piping is not disturbed in the opening and closing operation of the grain tank. .

According to the present invention, by disposing the urea water tank below the exhaust gas purification device or the urea water supply device, the urea water remaining in the urea water pipe or the like can be refluxed to the urea water tank. Moreover, by arrange | positioning a urea water tank below, the water supply position of a urea water tank can be made downward and it becomes easy to carry out water supply work.

According to the present invention, the urea water tank can be installed compactly by utilizing the space around the threshing device, and the urea water supply device installed on the threshing device side and the urea water pipe of the urea water tank can be configured in a short manner. . In addition, the urea water tank can be formed in a large capacity, and can be configured to supply urea water to the urea water tank during maintenance work such as around a grain tank or around an engine.

According to the present invention, the urea water tank can be compactly installed by utilizing the installation space of the fuel tank. In addition, the urea water tank can be supported by utilizing the support structure of the fuel tank. In addition, the replenishment workability can be improved by bringing the fuel supply unit and the urea water supply unit into close proximity.

BRIEF DESCRIPTION OF THE DRAWINGS It is a left side view of the 6-row harvesting combine which shows embodiment of this invention.
2 is a plan view of the same.
3 is the same right side view.
4 is a front perspective view showing the configuration of the engine compartment.
5 is a perspective view showing the positional relationship between the engine peripheral parts, the grain tank, and the threshing machine.
6 is an external perspective view of the engine and the exhaust gas purification device.
7 is a rear perspective view of the exhaust gas purifying device attachment part.
8 is a right side view showing a part of the threshing apparatus.
9 is an explanatory diagram of urea water supply.
It is a perspective view which shows the arrangement | positioning of components on the traveling body in the combine which becomes 1st Embodiment.
11 is a rear perspective view of the combine.
12 is a plan view of the combine.
It is a top view of the combine which becomes 2nd Embodiment.
14 is a rear perspective view of the combine.
15 is a front view of the urea water tank in the combine.
16 is a right side view of the combine.
It is a perspective view which shows the arrangement | positioning of each component 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 arrangement | positioning of components on the traveling body in the combine which becomes 4th Embodiment.
20 is a rear perspective view of the combine.
It is a figure which shows the modification of the urea water tank in the said combine.
It is a perspective view which shows the arrangement | positioning of components on the traveling body in the combine which becomes 5th Embodiment.
It is a front view (left side view of a combine) of the fuel tank and urea water tank of this combine.
It is a front view (left side view of a combine) which shows the 1st modified example of the fuel tank and urea water tank of this combine.
It is a side view which shows the structure of the fuel tank and urea water tank shown in FIG.
It is a side view which shows the structure at the time of separating the fuel tank and urea water tank shown in FIG.
It is a front view (left side view of a combine) which shows the 2nd modified example of the fuel tank and urea water tank of this combine.
It is a side view which shows the structure of the fuel tank and urea water tank shown in FIG.
FIG. 29 is a front view illustrating a state when the urea water is full in the urea water tank shown in FIG. 27.
It is a top view of the combine which becomes 6th Embodiment.
31 is the same right side view.
32 is a perspective view showing an arrangement of an engine and an exhaust gas purification device.
33 is a rear perspective view of the attachment portion of the exhaust gas purification device.
34 is a perspective view illustrating a component arrangement on a traveling body.
35 is a first modification of the arrangement of the exhaust gas purification apparatus.
36 is a second modification example of the arrangement of the exhaust gas purification apparatus.
37 is a front view showing the configuration around the engine and the exhaust gas purification apparatus.
It is a perspective view which shows the structure around the exhaust gas purification apparatus attachment part.
Fig. 39 is a rear perspective view showing the configuration around the exhaust gas purifying device attachment part.

<1st embodiment>

EMBODIMENT OF THE INVENTION Below, 1st Embodiment which actualized this invention is described based on FIGS. 1 to 3, the overall structure of the combine of the embodiment in which the diesel engine is mounted will be described. In addition, in the following description, the left side is only called the left side toward the advance direction of the traveling body 1, and similarly the right side is only called the right side toward a forward direction. As shown in FIGS. 1-3, the traveling body 1 supported by the left-right paired traveling crawler 2 as a traveling part is provided. The 6-row mowing device 3 introduced into the front of the traveling body 1 while mowing the grain stem is capable of elevating adjustment around the mowing pivot point 4a by the single-actuating lifting hydraulic cylinder 4. Is mounted. A threshing apparatus 5 having a feed chain 6 and a grain tank (grain tank) 7 for storing grains drawn out from the threshing apparatus 5 are mounted in the traveling body 1 in a horizontally arranged shape. In addition, the threshing apparatus 5 is arrange | positioned at the left side of the traveling body 1, and the grain tank 7 is arrange | positioned at the right side of the traveling body 1.

Moreover, the grain discharge conveyor 8 which can be turned through the longitudinal drawing conveyor 8a is provided in the rear part of the traveling body 1, and the grain inside the grain tank 7 is a rice straw inlet of the grain discharge conveyor 8; It is configured to be discharged from the rack 9 to the track carrier, the container, or the like. An operating cabin 10 is provided on the right side of the mowing device 3 and on the front side of the grain tank 7. The cabin pivot point shaft 10a is installed at the lower part of the front surface of the driving cabin 10, and the front lower part of the driving cabin 10 is pivotally supported on the traveling body 1 through the cabin pivot point shaft 10a. The driving cabin 10 is provided so as to be movable toward the outside of the outside of the cabin, and the driving cabin 10 is rotated to the front side around the cabin rotation point shaft 10a.

The threshing clutch lever 17 which controls the steering wheel 11, the driver's seat 12, the main gear lever 15, the sub transmission lever 16, and the threshing clutch in the driving cabin 10 is operated. And a harvesting clutch lever 18 for turning on and off the harvesting clutch. The diesel engine 14 as a power source is disposed in the traveling body 1 below the driver's seat 12. In the driving cabin 10, a step in which an operator boards, a handle column on which the steering wheel 11 is provided, a lever column on which the levers 15, 16, 17, and 18 are provided, and the like are arranged.

As shown in FIG. 1, the track frame 21 on either side is arrange | positioned at the lower surface side of the traveling body 1. As shown in FIG. The track frame 21 includes a drive sprocket 22 for transmitting the power of the engine 14 to the travel crawler 2, a tension roller 23 for maintaining the tension of the travel crawler 2, and a travel crawler 2. A plurality of track rollers 24 holding the ground side of the ground in the ground state and an intermediate roller 25 holding the non-grounding side of the traveling crawler 2 are provided. The front side of the traveling crawler 2 is supported by the drive sprocket 22, the rear side of the traveling crawler 2 is supported by the tension roller 23, and the ground of the traveling crawler 2 is grounded by the track roller 24. The side is supported and the non-ground side of the traveling crawler 2 is supported by the intermediate roller 25.

As shown in FIG. 1 and FIG. 2, the fuel tank 31 which stores the fuel supplied to the engine 14 is arrange | positioned at the left rear part of the traveling body 1, and the outside side of the threshing apparatus 5 left side is shown. Diesel fuel can be replenished into the fuel tank 31 from the above. That is, the fuel tank 31 is provided in the position which becomes below the straw discharge cutter 65 of the rear part of the threshing apparatus 5 on the traveling body 1, and the oil supply port 32 (refer FIG. 1 and FIG. 2). ) Is attached to the threshing apparatus 5 left side, and oil supply is possible from the outer side.

As shown in Fig. 1 and Fig. 2, the cutting frame 51 connected to the cutting pivot point axis 4a of the cutting device 3 has a barrican cutting device for cutting the bottom of the uncut rice grain placed in a package ( 52) is installed. In front of the harvesting frame 51, the rice straw raising apparatus 53 of 6 trillion which produces the uncut grain stem which was placed in the package is arrange | positioned. The grain stem conveying apparatus 54 which conveys the harvesting grain stems harvested by the harvesting | reaping blade apparatus 52 is arrange | positioned between the rice straw producing apparatus 53 and the front end part (feed | feed front side side) of the feed chain 6. In addition, the front of the lower part of the rice straw raising device 53, there is protruded 6 trillion minutes of the grass 55 for dividing the uncut grain stem. It is comprised so that the uncut grain stem put in the package by the harvesting apparatus 3 may be continuously mowed while moving inside a package.

Next, the structure of the threshing apparatus 5 is demonstrated with reference to FIG. 1 and FIG. As shown in FIG. 1 and FIG. 2, the threshing apparatus 5 has the rock stem sedimentation barrel 56, the rocking | fluctuation sorting plate 57, and the tuyere pan which sort out the threshing material falling below the barrel 56. 58), a processing cylinder 59 for reprocessing the threshing discharge drawn out from the rear part of the barrel 56, and a backing fan 60 for discharging dust in the rear part of the swinging sorting plate 57. Moreover, the grain stem conveyed by the grain stem conveyance apparatus 54 from the harvesting | reaping apparatus 3 is taken over by the feed chain 6, is carried in to the threshing apparatus 5, and is threshed by the barrel 56. As shown in FIG.

As shown in Fig. 1, the lower side of the rocking screening plate 57, the first conveyor 61 which draws out the grains (1st material) screened by the rocking screening plate 57, and the second material such as grains with a diameter The conveyor 62 which draws out is provided. The swing screening panel 57 is configured such that the threshed matter leaked from the support network 67 installed below the barrel 56 is rocked by the feed pan 68 and the chaff sheave 69 (weighted screening). . As for the grain falling from the rocking | fluctuation sorting board 57, the dust in the grain is removed by the sorting wind from the tuyere fan 58, and falls to the 1st conveyor 61. As shown in FIG. The grains withdrawn from the first conveyor 61 are carried into the grain tank 7 through the grain grain conveyor 63 and are collected in the grain tank 7.

In addition, as shown in FIG. 1, the rocking | flux sorting board 57 is comprised so that 2nd objects, such as a grain with a grain, from the chaff sieve 69 may fall to the 2nd conveyor 62 by rocking | swinging sorting. The sorting fan 71 which balloons the 2nd thing falling under the chaff sieve 69 is provided. The second object dropped from the chaff sieve 69 is removed by the sorting wind from the sorting fan 71, and the dust and straw waste in the grain fall to the 2nd conveyor 62. The end part of the 2nd conveyor 62 is connected in communication with the upper surface side of the feed pan 68 via the reduction conveyor 66, and it is comprised so that 2nd object may return to the upper surface side of the rocking | fluctuation sorting board 57, and reselected.

1 and 2, a straw discharge chain 64 and a straw discharge cutter 65 are disposed on the rear end side (feed end side) of the feed chain 6. The discharge straw (grained straw) which is connected to the straw discharge chain 64 from the rear end side of the feed chain 6 is discharged to the rear of the traveling body 1 in a long state, or the threshing apparatus 5 After shortly cutting into a suitable length with the straw discharge cutter 65 provided in the rear part of the (), it is comprised so that it may discharge to the rear downward of the traveling body 1. As shown in FIG.

As shown in FIG. 4 and FIG. 5, the grain tank 7 has the recess 7a for purification apparatus installation by the shape which notched the front left side, and the recess for grain discharge conveyor installation by the groove shape of the front-back direction on the upper left side. The part 7b and the recessed part 7c for grain-grain conveyor installation by the shape which formed the step | step in the up-down direction in the center of a left side surface are provided. A space is formed 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 disposed. In the grain discharge conveyor installation recess 7b of the upper surface of the grain tank 7, the grain discharge conveyor 8 which accommodated the front end in the conveyor support body is accommodated along the grain discharge conveyor installation recess 7b. In addition, the grain-grain conveyor 63 is fixed to the grain-bearing conveyor installation recess 7c on the left side of the grain tank 7 along the grain-shaped conveyor installation recess 7c, and is installed in the grain-shaped conveyor installation recess 7c. Connected by one receiver.

As shown in FIG. 4 and FIG. 11, the grain discharge conveyor 8 is rotatably supported by the upper end side of the longitudinal drawing conveyor (lateral conveyance conveyor) 8a, and the transfer end side of the grain discharge conveyor 8 is rotated. Rice straw inlet (9) is installed in the. The horizontal conveyer 8b is arrange | positioned forward and backward at the bottom of the grain tank 7, and the lower end (base end) side of the longitudinal drawing conveyor 8a is connected to the rear end of the horizontal conveyer 8b. In addition, an outer bottom plate 7d and an inboard bottom plate (not shown) are provided at the bottom of the grain tank 7, and the outer bottom plate 7d and the inboard bottom plate are inclined toward the lateral transfer conveyor 8b, and the grain is inclined. The grain inside the tank 7 flows down to the horizontal conveyer 8b. The lateral conveyance conveyor 8b is provided along the front and back of the bottom of the grain tank 7, and conveys the grain which flows down along the bottom plate of the grain tank 7 to the rear-view conveyor 8a.

The longitudinal drawing conveyor 8a is connected with the rear end of the horizontal conveyance conveyor 8b which protruded from the rear end surface of the grain tank 7, and is provided continuously along the rear end surface of the grain tank 7 toward the grain tank 7 upper direction. The longitudinal drawing conveyor 8a is installed at the rear of the grain tank 7 by connecting the lower end (base end) side to the transverse conveyor 8b and fixing the upper portion to the rear end face of the grain tank 7. Moreover, the lower end of the longitudinal drawing conveyor 8a is supported on the traveling body 1, the grain tank 7 can be transversely moved toward the outside of the periphery of the longitudinal drawing conveyor 8a, and the threshing apparatus 5 The right side and the back of the engine room 97 are comprised so that opening is possible. Moreover, the rear cover 30 which covers the circumference | surroundings of the longitudinal drawing conveyor 8a is detachably attached to the grain tank 7 back, and the bottom cover body is provided in the outer side bottom plate 7d outer surface of the grain tank 7. 165 is detachably installed.

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

In addition, the first case 75 has an inlet side case 76 and an outlet side case 77. It is arranged to nitrogen dioxide (NO ₂₎ diesel oxidation catalyst (79) of platinum, and to generate in the interior of the inlet-side case (76). A soot filter 80 having a honeycomb structure for continuously oxidizing and removing particulate matter PM collected in the inlet case 76 and the outlet case 77 at a relatively low temperature is disposed. Particulates in the exhaust gas of the diesel engine 14 by the diesel oxidation catalyst 79 and the soot filter 80 arranged in series in the moving direction of the exhaust gas in the inlet case 76 and the outlet case 77. In addition to the removal of the substance PM, carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas are reduced. On the other hand, in the second case 229, the SCR catalyst 232 and the oxidation catalyst 233 are arranged in series in the movement direction of the exhaust gas. The SCR catalyst 232 and the oxidation catalyst 233 in the second case 229 are configured to reduce the nitrogen oxide material (NOx).

4-7, the 1st case 75 and the 2nd case 229 are comprised in the elongate cylindrical shape extended in the gas left-right direction. Purification inlet pipes 81 for introducing the exhaust gas and purifying outlet pipes 82 for discharging the exhaust gas are provided on both sides of the cylindrical shape (one end of the exhaust gas moving direction and the other end side thereof) of the first case 75. . Similarly, SCR inlet pipes 236 for introducing the exhaust gas and SCR outlet pipes 237 for exhausting the exhaust gas are provided on both sides of the second case 29 (one end of the exhaust gas moving direction and the other end side thereof). .

4-7, the supercharger 118 which forcibly sends air to the diesel engine 14 is arrange | positioned at the exhaust gas outlet (exhaust manifold 117) of the diesel engine 14. As shown in FIG. . The purge inlet tube 81 is connected to the exhaust gas outlet side of the supercharger 118 via the exhaust connection pipe 119 to introduce the exhaust gas of the diesel engine 14 into the first case 75. The urea mixing pipe 239 connecting the SCR inlet pipe 236 to the purification outlet pipe 82 is connected to the exhaust gas from the first case 75 through the urea mixing pipe 239 into the second case 229. It is configured to introduce. In addition, the exhaust gas outlet side of the supercharger 118 and the exhaust connection pipe 119 are connected by a bendable and expandable accordion-shaped connection pipe 98 so that the vibration of the engine 14 on the supercharger 118 side is exhausted. It is comprised so that it is not transmitted to the pipe | tube 119 side.

On the other hand, the urea water injection part 240 of the purification | cleaning outlet pipe 82 and the urea mixing pipe 239 is bolted detachably by a pipe flange. The inlet case 76 and the outlet case 77 are detachably connected by bolting of a plurality of sets of thick plate-shaped intermediate flanges 84, and the outlet case 77 is separated to remove the soot filter 80. The disassembly maintenance is configured to be executable. In addition, the tail pipe 83 is connected to the SCR outlet pipe 237, and the exhaust gas outlet of the tail pipe 83 is opened toward the upper side of the gas, and the exhaust gas of the diesel engine 14 (each cylinder) is Introduced from the supercharger 118 into the first case 75, moved from the first case 75 to the urea mixing tube 239, and the urea water in the urea water tank 174 described later is mixed with the exhaust gas, The exhaust gas is introduced into the second case 229 and is configured to be discharged from the tail pipe 83 to the outside of the air.

With the above configuration, 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 (NO ₂ ). . In addition to the removal of particulate matter PM in the exhaust gas of the diesel engine 14, the content of carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas of the diesel engine 14 is reduced. Subsequently, in the urea mixing pipe 239, urea water is 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 ammonia generated by hydrolysis is mixed. In the exhaust gas in the second case 229, the content of the nitrogen oxide material (NOx) is reduced by the SCR catalyst 232 and the oxidation catalyst 233 for reducing the urea selective catalyst. In the first case 75 and the second case 229, the exhaust gas of the diesel engine 14 is purified and discharged to the outside from the tail pipe 83.

Next, as shown in FIG. 4 and FIG. 6, the engine room frame 91 as a gas frame is placed upright on the traveling body 1 in front of the grain tank 7, and the engine room is provided with the engine room frame 91. (97) is formed. The diesel engine 14 is mounted on the upper surface side of the traveling body 1, and the diesel engine 14 is installed inside the engine room 97. Further, cooling components such as a water cooling radiator (not shown) and a cooling fan 115 are installed inside the engine room 97 in the diesel engine 14 side. The cooling fan 115 is configured to introduce outside air from the right outer side of the combine body toward a cooling component such as a radiator (not shown), and to discharge the warmth of the diesel engine 14 toward the threshing device 5 side. have.

In addition, the right side, the back side, and the upper surface side of the diesel engine 14 and the cooling components are surrounded by the engine room frame 91, and the right outside of the engine room frame 91 by the cooling fan 115 of the diesel engine 14. The threshing apparatus as a working part which introduces the outside air for cooling into the engine room 97 from the inside, and the warmth after cooling the diesel engine 14 and a cooling component is adjacent to the engine room frame 91 (engine room 97). (5) It is configured to discharge toward the right side.

The engine room frame 91 is an angle in which both end sides are integrally fixed to the angular pipe-shaped support body 92 on the left side, the reverse U-shaped support body 93 on the right side, and the left and right supporters 92 and 93. It has a pipe-shaped transverse frame 94. The angular pipe-shaped transverse frame 94 has one end connected to the upper end of the angular pipe-shaped support body 92 and connected and fixed to the angular pipe-shaped frame 93a having the other end fixed above the inverted U-shaped support body 93. It is.

In addition, the rubber press-fitting leg (not shown) provided in the bottom face rear part of the driving cabin 10 is made to contact the upper surface of the pedestal 96 of the left and right of the horizontal frame 94 from the upper side, and the horizontal frame 94 The rear portions of the driving cabin 10 are supported by the respective pedestals 96 in such a manner that they can be separated in the vertical direction. The diesel engine 14 is installed in the engine room 97 formed of the operation cabin 10 bottom surface side and the engine room frame 91. 4, the conveyor support body 90 is provided in the upper end side of the left support body 92, and the grain discharge conveyor 8 is supported in a storage position through the conveyor support body 90. Moreover, as shown in FIG.

Moreover, the air cleaner 123 which supplies external air to the diesel engine 14, and the precleaner 124 which introduces external air into the air cleaner 123 are provided. In the upper surface of the engine room 97, the air cleaner 123 is disposed on the right side of the exhaust gas purification device 74, and the precleaner 124 is located above the engine room 97 on the right side in front of the grain tank 7. ), And the air cleaner 123 is connected to the precleaner 124 via the air supply pipe 125. The combustion air is introduced from the precleaner 124 into the compressor case 118a of the turbocharger 118 of the diesel engine 14 through the air cleaner 123. The air cleaner 123 is fixed to the rear right side of the transverse frame 94 of the engine room frame 91, and is thus located on the front right side of the exhaust gas purification device 74.

As shown in FIGS. 4-6, the supercharger 118 is provided in the upper front side of the diesel engine 14, The compressor case 118a which built a blower wheel is installed in the right side, and the turbine is located in the left side. The turbine case 118b incorporating a wheel is provided. The intake air introduction side provided at the right end of the compressor case 118a communicates with the intake air discharge side of the air cleaner 123 through the air supply pipe 120. On the other hand, the exhaust gas inlet (purification inlet pipe) of the exhaust gas purification device 74 which is a post-processing device through the accordion-shaped exhaust inlet pipe 98 in which the exhaust outlet pipe 99 provided at the left end of the turbine case 118b is bendable. It is connected with the exhaust connection pipe 119 connected to (81).

As shown in FIGS. 3-6, the exhaust gas purification apparatus 74 provided with the 1st case 75 and the 2nd case 229, and the air cleaner 123 and the precleaner 124 are engine rooms. It is arrange | positioned on the back of the frame 91 by the left and right with respect to the engine 14. That is, the air cleaner 123 and the precleaner 124 which become an intake machine are arrange | positioned to the compressor case 118a side of the right side with respect to the turbocharger 118 of the engine 14 front surface, and the turbine case 119b of the left side is arranged. The exhaust gas purification apparatus 74 used as an exhaust system is arrange | positioned at the side. Therefore, since the intake path and the exhaust path of the engine 14 including the supercharger 118 are arranged to the left and right, the intake path and the exhaust path can be configured in a short path, and the high-temperature exhaust gas passes therethrough. The intake path can be spaced apart from the exhaust path.

Next, with reference to FIGS. 4-7, the attachment structure and support structure of the exhaust-gas purification apparatus 74 are demonstrated. The exhaust gas purification device 74 is configured by connecting the first case (DPF) 75 and the second case (SCR) 229 in a parallel shape by the case fixing body 231. On the case fixing body 231, the first case 75 is detachably fixed to the plurality of fastening bands 85, and the second case 229 can be detachably attached to the plurality of fastening bands 230. To be fixed. That is, by bolting both ends of each of the plurality of fastening bands 85 and 230 to the case holder 231, the first case 75 and the second case 229 may be parallel to each other so as to be parallel to the case holder 231. Parallel to

By fixing the case holder 231 having the first case 75 and the second case 229 mounted on the upper surface to the support 250, the exhaust gas purification device 74 is supported on the traveling body 1. . As shown in FIGS. 4-7, the support stand 250 is arrange | positioned under the purification | cleaning apparatus installation recessed part 7a provided in the front left side (threshing apparatus 5 side) of the grain tank 7, and is exhausted. The gas purification device 74 is supported from the engine room 97 over the recess 7a for purification device installation. As shown in Figs. 5 to 7, the support stand 250 is fixed at the right side of the machine housing frame of the threshing apparatus 5, the front side is fixed at the engine room frame 97, and the right edge is traveling. By being fixed by the support frame 251 installed from the base 1, it is supported by the upward position in the recess 7a for purification apparatus installation of the grain tank 7. As shown in FIG.

As shown in FIGS. 4 and 6, the front side of the support 250 connects the other end of the bridge frame 252 fixed at the back side of the support 250 to the transverse frame 94 of the engine room frame 91. It is supported by the engine room frame 91 by this. In addition, as shown in FIG. 5, the left edge of the support base 250 is connected to the right side of the threshing apparatus 5 (the threshing upper frame on the upper right side of the threshing machine housing) through the attachment adjusting frame 253. It is supported by the right side of (5). In addition, as shown in FIG. 7, the right edge of the support base 250 is supported on the support frame 251 by connecting the upper end of the support frame 251 through the cross frame 254.

As shown in FIGS. 4 and 5, the bridge frame 252 is installed from the support base 250 toward the transverse frame 94 at a position between the air cleaner 123 and the purification inlet pipe 81. It is. Thereby, not only the space for the connection of the accordion-shaped exhaust inlet tube 98 arrange | positioned under the horizontal frame 94 and the purification | purification inlet tube 81 of the 1st case 75 can be secured, but also the air cleaner Buffering with 123 can also be prevented. In addition, since the bridge frame 252 is disposed at a position between the intake path including the air cleaner 123 and the exhaust path connected to the first case 75, the air cleaner 123 The influence of the arrangement from the exhaust path can be reduced.

As shown in FIGS. 4-7, the grain tank 7 has the recess 7a for purification | cleaning apparatus installation in the surface which faces the engine room 97, The recess for the purification | cleaning apparatus installation of the grain tank 7 is shown. The exhaust gas purification device 74 by the 1st case 75 and the 2nd case 229 is arrange | positioned at 7a. As a result, the exhaust gas purification device 74 can be disposed between the grain tank 7 and the engine room 97 at a position close to the engine 14, and the exhaust gas purification device 74 becomes a high temperature. The worker can be prevented from contacting. In addition, since the arrangement from the engine room 97 can be guided to the exhaust gas purification device 74, the exhaust gas purification device 74 is disposed under a high temperature environment required for purification of the exhaust gas, thereby providing an exhaust gas purification device ( In 74), a high purification effect can be maintained.

4-7, the 1st case 75 and the 2nd case 229 are leveled from the threshing apparatus 5 to the recess 7a for the purification | cleaning apparatus installation of the grain tank 7 here. The first case 75 and the second case 229 are arranged in parallel. By supporting the first case 75 and the second case 229 horizontally, the exhaust gas purification device 74 can be arranged in a position higher than that of the engine 14, and the exhaust gas of the high temperature from the engine 14 is exhausted. It is possible to have a structure in which gas is easily guided to the exhaust gas purification device 74. In addition, by arranging the exhaust gas purification device 74 at a high position, water generated by condensation or the like due to a temperature drop when the engine 14 is stopped can be prevented from accumulating in the exhaust gas purification device 74.

As shown in FIGS. 4-7, while connecting the 1st case 75 and the 2nd case 229 of the exhaust-gas purification apparatus 74 in parallel with the case fixing body 231, The exhaust inlet of the second case 229 is connected to the exhaust outlet of the case 75 via the urea mixing pipe 239, and the first and second cases 75 between the first and second cases 75 and 229. 229), the element mixing pipe 239 is arranged in parallel with each other. As a result, the exhaust gas purification device 74 is compact in the first case, the second case, and the urea mixing pipe in an integrated unit structure, and inside the recess 7a for the purification device installation in front of the grain tank 7. Can be installed. Therefore, while the installation space of the exhaust gas purification device 74 can be easily secured, the concave portion 7a for purification device installation of the grain tank 7 is narrowly configured, and grain storage of the grain tank 7 is carried out. Capacity can be secured.

The longitudinal direction of each of the first and second cases 75 and 229 of the exhaust gas purification device 74 is set in the longitudinal direction, and the first and second cases 75 and 229 are arranged side to side, and the first case 75 is arrange | positioned at the threshing apparatus 5 side. The second case 229 is disposed by arranging the first case 75 on the threshing apparatus 5 side and the second case 229 inside the recess 7a for the purification device installation of the grain tank 7. And the urea mixing pipe 239 can be disposed so as to cover the grain tank 7, and the first case 75 can be disposed 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 constituted by a short path, and the regeneration process in the first case 75 can be maintained at high performance. In addition, the second case 229 and the urea mixing pipe 239 can be disposed in a high temperature environment surrounded by the grain tank 7 behind the engine room 97, thereby preventing freezing of the urea water, The purification ability in the case 229 can be maintained highly.

As shown in FIGS. 7-12, urea water tank 174 for storing urea water (urea water solution for selective catalytic reduction) and urea water in the urea water injection unit 240 of the urea mixing tube 239 Urea water supply device 175 for supplying a. The urea water supply device 175 supplies the urea water in the urea water tank 174 to the urea water injection part 240 of the urea mixing pipe 239, thereby urea water injection valve 178 of the urea water injection part 240. Urea water is sprayed into the urea mixing pipe 239.

As shown in FIG. 9, the urea water supply device 175 is a urea water pump 171 for pumping the urea water solution in the urea water tank 174 and a urea water supply for driving the urea water pump 171. An electric motor 172 is provided. The urea water supply device 175 is connected to the urea water injection valve 178 of the urea water injection unit 240 through the urea water injection pipe 177, and also to the urea water supply pipe 174 between the urea water tank 174. 179 and the urea water return pipe 180 are connected. Moreover, the engine controller 181 which performs fuel injection control etc. of the diesel engine 14, and the urea injection controller 182 which controls the urea water supply apparatus 175 or the urea water injection valve 178 are provided. .

The urea water injection valve 178 is installed in the urea water injection unit 240 of the urea mixing pipe 239, and the urea water solution is sprayed from the urea water injection valve 178 into the urea mixing pipe 239. do. 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. In addition, the urea injection controller 182 is connected to the urea water temperature sensor 183 of the urea water tank 174 and the urea water quantity sensor 184 of the urea water tank 174, and the engine controller 181 The urea injection controller 182 is connected, and the urea water is supplied into the urea mixing pipe 239 at an appropriate time in accordance with the operating conditions of the diesel engine 14 or the like.

First, the attachment structure of the urea water supply device 175 will be described. As shown in FIG. 7 and FIG. 8, the urea water supply device 175 is disposed between the threshing apparatus 5 and the grain tank 7 at a height position below the exhaust gas purification apparatus 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 stops, the urea water remaining in the urea water injection pipe 177 or the like due to the height difference between the urea water supply device 175 and the urea water injection valve 178 is transferred to the urea water supply device 175. It may also be refluxed.

10 and 12, the exhaust gas purification device 74 is installed between the threshing device 5 and the grain tank 7 behind the engine room 97, and the exhaust gas purification device 74. ), The urea water supply device 175 for supplying urea water 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 disposed behind the engine room 97, it is possible to prevent freezing of the urea water using the arrangement from the engine 14, Therefore, quality deterioration of urea water can be suppressed.

10 and 12, the exhaust gas purification device 74 is disposed at a position sandwiched back and forth by the engine room 97 and the grain tank 7, and the grain tank 7 and the threshing apparatus ( The urea water supply device 175 is disposed at the position sandwiched by 5). The capacity of the grain tank 7 can be ensured by arranging the exhaust gas purification device 74 and the urea water supply device 175 using the space around the grain tank 7 effectively. In addition, since the exhaust gas purification device 74 and the urea water supply device 175 can be disposed at a short distance, urea water piping (urea water) connecting the exhaust gas purification device 74 and the urea water supply device 175 can be provided. The injection pipe 177) can be constructed in short.

As shown in FIG. 7 and FIG. 8, the urea water supply device 175 is located on the right side of the threshing apparatus 5 (the grain tank 7 side) in the region sandwiched by the grain-grain conveyor 63 and the reduction conveyor 66. ) Is fixed. As a result, the urea water supply device 175 can be disposed in the vicinity of the exhaust gas purification device 74 located in the front of the grain tank 7 adjacent to the threshing apparatus 5, and thus, from the urea water tank 174. The urea water pipe (urea water injection pipe 177) connecting up to the urea water injection part 240 can be constructed in short. In addition, the exhaust gas purification device 74 and the urea water supply device 175 can be disposed in the flow path of the array air constituted between the threshing apparatus 5 and the grain tank 7 behind the engine room 97. Therefore, the SCR system can be operated under an optimum temperature environment, for example, to prevent freezing of urea water.

In this embodiment, as shown to FIG. 7 and FIG. 8, the urea water supply apparatus 175 is being fixed to the position which is front side than the grain-grain conveyor 63, and becomes lower side of the reduction conveyor 66. As shown in FIG. That is, the urea water supply device 175 is fixed to the right side of the threshing apparatus 5, and is disposed at a position between the tuyere fan 58 and the first conveyor 61 at the lower side of the reduction conveyor 66. have. That is, the urea water supply device 175 is disposed at a position surrounded by the grain-bearing conveyor 63 and the reduction conveyor 66 that cross each other, and a cover body 58a covering the right suction port of the tuyere fan 58. .

On the other hand, the grain tank 7 is provided with the grain-grain conveyor 63 and the reduction conveyor 66, without buffering. Therefore, by arranging the urea water supply device 175 in the enclosed region of the grain-grain conveyor 63 and the reduction conveyor 66, the urea water supply device 175 is the grain tank 7 and the threshing device 5 without buffering. Since it can fix to a side surface, it is not necessary to change the shape of the grain tank 7, and the capacity of the grain tank 7 can be ensured.

Next, with reference to FIG. 8, the modification of the installation position of the urea water supply apparatus 175 arrange | positioned at the area | region sandwiched by the grain grain conveyor 63 and the reduction conveyor 66 is demonstrated. As shown in FIG. 8, the urea water supply device 175 may be provided at a position that is before the grain conveyor 63 and is lower than the reduction conveyor 66. By arrange | positioning at an equal height position, it arrange | positions at the height position which becomes lower than the exhaust gas purification apparatus 74. As shown in FIG.

In addition, as shown by the virtual line in FIG. 8, you may install the urea water supply apparatus 175 in any one of the upper and lower sides of the reduction conveyor 66 behind the grain grain conveyor 63. As shown in FIG. In addition, in the case where the grain grain conveyor 63 and the reduction conveyor 66 are arranged without intersecting on the right side of the threshing apparatus 5, the urea water supply device 175 is provided between the grain grain conveyor 63 and the reduction conveyor 66. ) May be installed.

Next, with reference to FIGS. 10-12, the attachment structure of the urea water tank 174 is demonstrated. As shown in FIGS. 10-12, the urea water tank 174 is arrange | positioned behind the grain tank 7, and the fuel tank 31 is arrange | positioned behind the threshing apparatus. The oil supply 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 side toward the rear side (right inclination rear side), and is vertically arranged between the longitudinal drawing conveyor 8a and the rear cover 30. The water supply port 174a protrudes from the opening part (not shown) of the rear cover 30, and is comprised so that the water supply port 174a is accessible from outside.

As shown in FIGS. 10-12, the urea water tank 174 is arrange | positioned perpendicularly | vertically in the longitudinal direction, and is below the right edge (outer edge) of the rear end surface of the grain tank 7. As shown in FIG. It is fixed. Then, the water supply port 174a is projected toward the right side on the opposite side to the oil supply port 32 facing the left side of the traveling body 1, so that the fueling operation to the fuel tank 31 or the urea water tank 174 is performed. When performing water supply work, the misjudgement of the oil supply port 32 and the water supply port 174a can be prevented. In addition, since the water supply port 174a is inclined backward, the amount of enclosing the water supply hose from the oil supply port 32 to the water supply port 174a can be reduced, so that the oil supply operation and the water supply operation can be executed at the same time. have.

As shown in FIG.10 and FIG.11, the urea water tank 174 is arrange | positioned vertically around the longitudinal drawing conveyor (lateral feed conveyor) 8a behind the grain tank 7. As shown in FIG. The urea water tank 174 is disposed inside the rear cover 30, and is provided in parallel with the longitudinal drawing conveyor 8a. 10 and 12, the urea water tank 174 is connected to the urea water supply pipe 179 and the urea water return pipe 180 which are piped between the threshing apparatus 5 and the grain tank 7. It is connected with the urea water supply apparatus 175 arrange | positioned at the left side of the grain tank 7. As shown in FIG. That is, since the exhaust gas purification device 74, the urea water supply device 175, and the urea water tank 174 can be arranged by utilizing the space around the grain tank 7, the capacity of the grain tank 7 can be increased. It can be secured.

10 and 12, the exhaust gas purification device 74 is disposed around the front of the grain tank 7, and the urea water supply device 175 is disposed on the side of the grain tank 7, and the urea water The tank 174 is disposed behind the grain tank 7. That is, since the urea water supply device 175 is disposed between the exhaust gas purification device 74 and the urea water tank 174, the urea water pipe 177 from the urea water tank 174 to the exhaust gas purification device 74. , 179, 180) can be configured as a singleton.

As shown in FIG. 12, the grain tank 7 supports the grain tank 7 rear part on the seed take-out conveyor 8a, and is able to move sideways toward the outside around the axis of the longitudinal take-out conveyor 8a. Consists of. By rotating the grain tank 7 outwardly around the vertical around the vertical rotational axis of the longitudinal drawing conveyor 8a, the right side of the threshing apparatus 5 and the back of the engine room 97 can be opened. Since the urea water tank 174 is provided around the longitudinal drawing conveyor 8a, the connection portions of the urea water supply pipe 179 and the urea water return pipe 180 can be arranged near the rotation point of the grain tank 7. Can be. The urea water supply pipe 179 and the urea water return pipe 180 are piped by bypassing the rear surface from the left side surface of the grain tank 7. Therefore, the pipe distance from the urea water tank 174 to the urea water supply device 175 is shortened at the time of opening the grain tank 7 compared with the storage of the grain tank 7, and the opening and closing of the grain tank 7 is performed. The difference in piping distance can be reduced by this.

In addition, when opened by the horizontal movement of the grain tank 7, the exhaust gas purification device 74 and the urea water supply device 175 behind the engine room 97 can be easily accessed, while the grain tank ( When 7) is stored, the exhaust gas purification device 74 and the urea water supply device 175 are inaccessible. Therefore, when storing the grain tank 7, 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 worker can be ensured and the grain can be maintained in various operations such as maintenance. By opening the tank 7, the exhaust gas purification device 74 and the urea water supply device 175 can be easily accessed.

<2nd embodiment>

Next, 2nd Embodiment which actualized this invention is described based on FIGS. 13-16. In addition, in the combine in this embodiment, the urea water tank 174 behind the grain tank 7 is arrange | positioned horizontally below the grain tank 7 unlike 1st Embodiment. Since the other structure is the same structure as the combine in 1st Embodiment, the detailed description is abbreviate | omitted and the structure regarding the urea water tank 174 is demonstrated below.

In the combine in this embodiment, as shown in FIG. 13, the exhaust gas purification apparatus 74 is arrange | positioned in front periphery of the grain tank 7, and the urea water supply apparatus 175 is located in the grain tank 7 side. The urea water tank 174 is disposed behind the grain tank 7. In addition, the fuel tank 31 and the urea water tank 174 are arranged side by side from the rear of the traveling body 1 so that the fuel supply port 32 and the urea water supply port 174a can be easily identified. I am doing it.

As shown in FIGS. 13-15, the urea water tank 174 is fixed to the bottom plate of the grain tank 7 in a horizontal arrangement, and the rear end part protrudes rearward from the grain tank 7. As shown to FIG. That is, the rear end portion of the urea water tank 174 is disposed near the connecting portion of the longitudinally drawn conveyor 8a and the transverse conveyor 8b. The rear end of the urea water tank 174 is the left side of the grain tank 7 through the urea water supply pipe 179 and the urea water return pipe 180 that are piped between the threshing apparatus 5 and the grain tank 7. It is connected with the urea water supply apparatus 175 arrange | positioned at.

As shown in FIG. 14 and FIG. 15, the tank support 173 is provided on the outer side of the outer bottom plate 7d of the grain tank 7, and the outside of the grain tank 7 is provided through the tank support 173. The urea water tank 174 is supported on the outer surface of the bottom plate 7d. The bottom cover body 165 is detachably attached to the outer side of the outer bottom plate 7d of the grain tank 7, and the urea water tank 174 is disposed on the inboard side of the bottom cover body 165. The water supply port 174a is disposed on the right side of the urea water tank 174 toward the right side (outside air side). At this time, an opening is formed in the rear cover 30, and the water supply port 174a of the urea water tank 174 is projected to the outside side, whereby the water supply operation can be performed easily from the outside.

As shown in FIG. 13, the rear end part of the urea water tank 174 connected with the urea water supply pipe 179 and the urea water return pipe 180 is arrange | positioned near the rotation point of the grain tank 7. As shown in FIG. The rear end portion of the urea water tank 174 is the left side of the grain tank 7 through the urea water supply pipe 179 and the urea water return pipe 180, which are piped between the threshing apparatus 5 and the grain tank 7. It is connected with the urea water supply apparatus 175 arrange | positioned at. Therefore, the pipe distance from the urea water tank 174 to the urea water supply device 175 is shortened at the time of opening the grain tank 7 compared with the storage of the grain tank 7, and the opening and closing of the grain tank 7 is performed. The difference in piping distance can be reduced by this.

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

By disposing the urea water injection valve 178 at a higher position than the urea water supply device 175, the urea water injection valve 178 remains due to the height difference between the urea water supply device 175 and the urea water injection valve 178. Urea water can be returned to the urea water supply device 175. Similarly, by arranging the urea water supply device 175 at a higher position than the urea water tank 174, the urea water tank 174 and the urea water supply device 175 remain after the injection stop of the urea water. Urea water may be returned to the urea water tank 174. Accordingly, as shown in FIG. 16, the urea water supply device 175 is disposed after the engine stops 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 can be returned to the urea water tank 174 without being circulated by, so that the urea water return pipe 180 can be omitted.

Third Embodiment

Next, 3rd Embodiment which actualized this invention is described based on FIG. 17 and FIG. In addition, in the combine in this embodiment, the urea water tank 174 is arrange | positioned in the space below the threshing apparatus 5 unlike 1st and 2nd embodiment. Since the other structure is the same structure as the combine in 1st and 2nd embodiment, the detailed description is abbreviate | omitted and the structure regarding the urea water tank 174 is demonstrated below.

As shown in FIG. 17 and FIG. 18, the urea water tank 174 is arrange | positioned under the threshing machine frame 36 which comprises the frame body of the threshing apparatus 5. The urea water tank 174 can be installed compactly by utilizing the space under the threshing machine frame 36, and the urea water tank 174 is formed in a large capacity, so that it is around the grain tank 7 or the engine 14 The urea water tank 174 can be configured to be replenishable at the time of maintenance work.

As shown to FIG. 17 and FIG. 18, the urea water supply apparatus 175 is arrange | positioned at the right side surface (grain tank 7 side) of the threshing apparatus 5, and the urea water tank 174 and the urea water supply apparatus are shown in FIG. Piping paths (urea water supply pipe 179 and urea water return pipe 180) connecting the 175 can be configured in short. Therefore, the piping path from the exhaust gas purification device 74 to the urea water tank 174 can be shortened, so that the pumping of urea water in each of the pipes 177, 179, and 180 can be smoothed, and recrystallization can be carried out. The deterioration of the quality of urea water based on aging or freezing can be suppressed. Since the exhaust gas purification device 74 is disposed between the threshing device 5 and the grain tank 7, the exhaust gas purification device 74 and the urea water supply device are utilized by utilizing the space around the threshing device 5. 175 and the urea water tank 174 can be compactly arranged, thereby improving maintenance and assembly of the SCR system.

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

As shown to FIG. 17 and FIG. 18, in this embodiment, the urea water tank 174 is arrange | positioned in the lower surface side of the tuyere trough 37 among the threshing machine frames 36 lower part. That is, by installing the urea water tank 174 at a position between the blowhole fan 58 and the first conveyor 61, the urea water tank at a position below the urea water supply device 175 and offset in the left and right directions. 174 may be placed.

As shown in FIG. 17 and FIG. 18, the urea water supply pipe 179 and the urea water return pipe 180 connected to the urea water tank 174 follow the right side of the threshing apparatus 5 up and down, and also the threshing machine. The lower side of the frame 36 may be left and right, and piping may be performed in a short stroke. In addition, the urea water tank 174 can be disposed in the vicinity of the tuyere fan 58 which guides the arrangement from the engine 14, and by using the arrangement from the engine 14, freezing or recrystallization of urea water is prevented. can do.

Next, with reference to FIG. 18, the modification of the installation position of the urea water tank 174 arrange | positioned under the threshing machine frame 36 is demonstrated. As shown by the virtual line of FIG. 18, you may install the urea water tank 174 in the lower surface side of the 1st trough 38 or the 2nd trough 39. As shown to FIG. That is, the urea water tank 174 may be disposed at a position between the first conveyor 61 and the sorting fan 71, and the urea water tank 174 is disposed at a position that is behind the second conveyor 62. It does not matter. Thereby, the urea water tank 174 can be compactly installed utilizing the space under the sheller frame 36.

Fourth Embodiment

Next, 4th Embodiment which actualized this invention is described based on FIGS. 19-21. Moreover, in the combine in this embodiment, unlike the 3rd embodiment, the urea water tank 174 is arrange | positioned in the side space of the threshing apparatus 5. Since the other structure is the same structure as the combine in 3rd embodiment, the detailed description is abbreviate | omitted and the structure regarding the urea water tank 174 is demonstrated below.

As shown in FIG. 19 and FIG. 20, the urea water tank 174 which stores urea water is arrange | positioned inside the side cover 41 which covers the left side of the threshing apparatus 5. As shown in FIG. The urea water tank 174 can be installed compactly by utilizing the space inside the side cover 41, and the urea water supply device disposed on the right side (the grain tank 7 side) of the threshing apparatus 5 ( Piping path (Urea water supply pipe 179 and urea water return pipe 180) connecting the 175 can be configured in short.

As shown to FIG. 19 and FIG. 20, the urea water tank 174 is arrange | positioned in the left side of the fuel tank 31 among the side covers 41 inner side. The urea water tank 174 is configured in an L shape that covers the rear side from the lower side of the fuel tank 31 left side. The urea water tank 174 is comprised so that the lower side and the rear side of the oil supply port 32 which protruded toward the exterior side (left side) from the upper left side of the fuel tank 31 may be comprised.

The urea water tank 174 is provided in the front-rear direction from the left side of the fuel tank 31, and has a shape which protruded the rear part upwards. And the urea water tank 174 protrudes the water supply port 174a toward the outer side (left side) to the upwardly protruding part in the rear. By constituting the urea water tank 174 as described above, the urea water tank 174 can be installed compactly by utilizing the installation space of the fuel tank 31, and the oil supply port (fuel supply part) 32 and the water supply port (Urea water supply part) 174a can be arrange | positioned close to it, and replenishment workability can be improved.

In this embodiment, the urea water tank 174 may be integrally formed with the side cover as in the modification shown in FIG. 21. In the modification shown in FIG. 21, the urea water tank 174 includes a tank portion for storing urea water on the back side (fuel tank 31 side) of the side cover portion 174b that covers the entire left surface of the fuel tank 31 ( 174c) is provided, while a water supply port 174a communicating with the tank 174c is provided on the front side of the side cover portion 174b. Moreover, the opening part 174d is provided in the non-installation area | region of the tank part 174c of the side cover part 174b, and the oil supply port 32 of the fuel tank 31 is inserted through the said opening part 174d.

At this time, by connecting the tank portion 174c, the urea water supply pipe 179, and the urea water return pipe 180 with a quick coupler or the like, the side cover-integrated urea water tank 174 can be separated. can do. As a result, by separating the urea water tank 174, the maintenance and cleaning work around the fuel tank 31 is facilitated, and the urea water tank 174 is separated and stored, thereby optimizing the urea water. Can be managed under temperature environment.

Fifth Embodiment

Next, 5th Embodiment which actualized this invention is described based on FIGS. 22-29. In addition, in the combine in this embodiment, the urea water tank 174 behind the grain tank 7 is piled up and arrange | positioned in the fuel tank 31 unlike 3rd embodiment. Since the other structure is the same structure as the combine in 3rd Embodiment, the detailed description is abbreviate | omitted and the structure regarding the urea water tank 174 is demonstrated below.

As shown in FIG. 22 and FIG. 23, the urea water tank 174 is disposed below the fuel tank 31 and the nesting threshing apparatus 5, and the water supply port 174a and the fuel tank of the urea water tank 174 are disposed. The oil supply port 32 of 31 is projected toward the outer side of the threshing apparatus 5. Since this can arrange | position the supply ports (oil supply port 32 and water supply port 174a) of each of the fuel tank 31 and the urea water tank 174, it is necessary for oil supply and water supply work. I can alleviate the burden.

As shown in FIG. 22 and FIG. 23, the threshing machine frame 36 (No. 2 groove | channel 39) and the oscillation sorting plate 57 which comprise the frame body of the threshing apparatus 5 in the back of the threshing apparatus 5 are shown. The urea water tank 174 which stores urea water in the rear lower part of the () is superimposed with the fuel tank 31, and is arrange | positioned. In addition, the urea water tank 174 and the fuel tank 31 are arranged in an upper and lower direction inside the side cover 41 covering the left side of the threshing apparatus 5, and the oil supply port 32 is disposed more than the opening of the side cover 41. ) And the water supply port 174a protrude outward. Thereby, the urea water tank 174 can be compactly installed utilizing the space behind the threshing apparatus 5, and the urea number arrange | positioned at the right side surface (grain tank 7 side) of the threshing apparatus 5 is carried out. Piping paths (urea water supply pipe 179 and urea water return pipe 180) connecting the supply device 175 can be configured in short.

As shown in FIG.22 and FIG.23, while making the fuel tank 31 upper side into a taper shape (shape whose front-back width narrows toward upper direction), the urea water tank 174 is comprised in substantially inverted U shape. do. The urea water tank 174 is shaped to fit the upper surface of the fuel tank 31 so that the upper surface of the fuel tank 31 is covered with the lower surface of the urea water tank 174 so that the urea water tank 174 is covered on the fuel tank 31. Install on. In addition, the urea water tank 174 is mounted on the fuel tank 31 by sandwiching 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 detachable from the fuel tank 31. At this time, the urea water tank 174 may be detachably formed by sliding the urea water tank 174 in the left and right direction with respect to the fuel tank 31, and the detachment of the urea water tank 174 in the up and down direction with respect to the fuel tank 31 may be performed. You can do it. At this time, the connection part of the urea water tank 174, the urea water supply pipe 179, and the urea water return pipe 180 is detachable with a quick coupler or the like. Thus, by constituting the urea water tank 174 detachably from the fuel tank 31, not only can the water be supplied simply by replacing the urea water tank 174, but also the urea water tank 174 is completed after the work is completed. Since it can be stored separately, the quality deterioration of urea water can be prevented.

Next, with reference to FIGS. 24-26, the 1st modified example in this embodiment is demonstrated below. In the present modification, as shown in FIGS. 24 to 26, the urea water tank 174 is disposed below the fuel tank 31, and the urea water tank 174 is disposed to surround the fuel tank. When the fuel tank 31 surrounds the urea water tank 174, the fuel tank 31 functions as a heat insulating layer, so that the thermal insulation effect in the urea water tank 174 can be improved, so that the urea water tank 174 The deterioration of the number of urea stored in the structure can be suppressed.

In the first modification, as shown in Figs. 25 and 26, the notch part 31a is provided below the left side (side surface on which the oil filling port 32 is provided) of the fuel tank 31, and the notch part ( The urea water tank 174 is fitted to 31a). The urea water tank 174 has a shape that fits the notch portion 31a of the fuel tank 31, and thus is disposed below the left side of the fuel tank 31, and is disposed on the notch portion 31a of the fuel tank 31. The upper and right surfaces of the urea water tank 174 are covered by this.

As shown in FIG. 25, the fuel tank 31 is fixed to the traveling 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 with the storage position (notch part 31a formation position) of the urea water tank 174, whereby the urea water tank 174 is also a tank support ( 33) can be supported and fixed to the traveling body (1). In addition, since the tank support 33 is attached to the left end of the urea water tank 174, the urea water tank 174 is connected to the fuel tank without removing the tank support 33. Can be separated from (31).

Next, with reference to FIGS. 27-29, the 2nd modified example in this embodiment is demonstrated below. In this modified example, as shown in FIGS. 27-29, in the state where the urea water tank 174 is arrange | positioned under the fuel tank 31, and the urea water tank 174 is arrange | positioned so that it may be surrounded by the fuel tank, It is set as the shape which has the convex part 174x which protruded the urea water tank 174 upward rather than the water supply port 174a. By providing the convex part 174x provided upstream from the water supply port 174a, the space which is not filled with urea water can be ensured in a part of convex part 174x. Therefore, even when urea water in the urea water tank 174 is frozen, the volume of urea water in the urea water tank 174 is prevented from exceeding the volume of the urea water tank 174, thereby preventing the Breakage can be prevented.

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 outward from the left end portion (the left side) of the fuel tank 31. That is, when the urea water tank 174 is fitted to the notch portion 31a of the fuel tank 31, the left side of the urea water tank 174 is located on the left side of the left side of the fuel tank 31. At the left end of the urea water tank 174, a convex portion 174x protruded upward from the water supply port 174a is provided at a position offset from the oil supply port 32 of the fuel tank 31. On the upper surface of the convex portion 174x, a breather 174y is provided to form an external air.

As shown in FIG. 28 and FIG. 29, even when the urea water is supplied to the urea water tank 174 by the configuration having the breather 174y at a position higher than the water supply port 174a, the convex portion 174x Instead of being 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 is frozen, an increase in the volume of the frozen urea water can be accommodated in the space above the convex portion 174x, so that the volume of the urea water tank 174 is exceeded. Since there is no, damage to the urea water tank 174 can be prevented.

Sixth Embodiment

Next, 6th Embodiment which actualized this invention is described based on FIG. 30-34. In addition, the combine in this embodiment differs from each previous embodiment, and the urea water tank 174 below the exhaust gas purification device 74 between the front surface of the grain tank 7 and the back of the engine room 97. Is placed. Since the other structure is the same structure as the combine in each embodiment mentioned above, the detailed description is abbreviate | omitted and the structure regarding the urea water tank 174 is demonstrated below.

30 to 34, the urea water tank 174 is disposed between the front surface of the grain tank 7 and the rear surface of the engine room 97 and below the exhaust gas purification device 74. The urea water tank 174 arranges the water supply port 174a provided above the tank toward the outside side (right side), and the urea water tank 174 from the outside side between the grain tank 7 and the engine room 97. The urea solution can be replenished within Moreover, the urea water tank 174 is arrange | positioned at the right side of the threshing apparatus 5, and is surrounded by the engine room frame 91, the threshing apparatus 5 right side surface, and the grain tank 7 whole surface. As a result, the urea water tank 174 is disposed at a position for guiding the heated air through the engine room 97, so that the urea water tank 174 can be kept at an appropriate temperature to freeze the urea water stored. Can be prevented. Moreover, while arrange | positioning the fuel tank 31 and the urea water tank 174 to the left and right of the traveling body 1, and toward the left side of the traveling body 1 toward the right side on the opposite side to the oil supply port 32, Since the water supply port 174a is protruded, misjudgement of the oil supply port 32 and the water supply port 174a can be prevented when the oil supply operation to the fuel tank 31 or the water supply operation to the urea water tank 174 is performed. .

As shown in FIG. 33 and FIG. 34, the urea water supply device 175 is disposed at a height position lower than the exhaust gas purification device 74 between the threshing apparatus 5 and the grain tank 7. In addition, the urea water supply device 175 is disposed to be offset in the front-rear direction (or the left-right direction) at a position higher than the urea water tank 174. That is, the urea water supply device 175 is fixed at a position higher than the urea water tank 174 and lower than the urea water injection valve 178.

Therefore, after the urea water injection stops, the urea water remaining in the urea water injection pipe 177 or the like due to the height difference between the urea water supply device 175 and the urea water injection valve 178 is transferred to the urea water supply device 175. It may also be refluxed. Similarly, after the injection stop of the urea water, the urea water supply device 175, the urea water supply pipe 179, and the urea water return pipe 180 are caused by the height difference between the urea water tank 174 and the urea water supply device 175. The remaining urea water may be returned to the urea water tank 174. In addition, since the urea water tank 174 and the urea water supply device 175 are offset from each other in the horizontal direction, the filter replacement of the urea water supply device 175 located at a position higher than the urea water tank 174 is called. Maintenance work becomes easy.

As shown in FIG. 34, the grain tank 7 is the recess 7a for purification apparatus installation by the shape which took up the front left side, and the recess 7b for grain discharge conveyor installation by the groove shape of the front-back direction on the upper left side. ) And a recess 7c for grain-bearing conveyor installation having a shape in which a step is formed along the vertical direction in the center of the left surface. A space is formed behind the engine room 97 in the recess 7a for installing the purification apparatus on the front surface of the grain tank 7, and the exhaust gas purification apparatus 74 and the urea water tank 174 are disposed. In the grain discharge conveyor installation recess 7b of the upper surface of the grain tank 7, the grain discharge conveyor 8 which received the front-end | tip in the conveyor support body is accommodated along the grain discharge conveyor installation recess 7b. In addition, the grain-grain conveyor 63 is fixed to the grain-shaped conveyor installation recessed part 7c of the grain tank 7 on the left side, and is installed in the grain-shaped conveyor installation recessed part 7c, and is installed in the grain-shaped conveyor-mounted recessed part 7c. Connected by one receiver.

The grain tank 7 supports the grain tank 7 rear part on the longitudinal drawing conveyor 8a, and is comprised so that a lateral movement is possible to the periphery around the axis of the longitudinal drawing conveyor 8a. By rotating the grain tank 7 outwardly around the vertical around the vertical rotational axis of the longitudinal drawing conveyor 8a, the right side of the threshing apparatus 5 and the back of the engine room 97 can be opened. Therefore, when an operator opens by the horizontal movement of the grain tank 7, the SCR by the exhaust gas purification apparatus 74, the urea water tank 174, and the urea water supply apparatus 175 of the engine room 97 back. While the system can be easily accessed, when the grain tank 7 is stored, the SCR system becomes inaccessible. As a result, the operator cannot contact the exhaust gas purification device 74, the urea water tank 174, and the urea water supply device 175, which become high during operation, thereby ensuring safety and Access to the SCR system is easily performed in various operations such as water supply and maintenance.

FIG. 35: is explanatory drawing of the 1st modification in the structure with which the exhaust gas purification apparatus 74 (1st case 75 or 2nd case 229) was attached. In the above-described embodiment shown in FIG. 4 and the like, the first case 75 of the exhaust gas purification device 74 is disposed on the threshing device 5 side, but in the first modification shown in FIG. 75 and the second case 229 were supported by the case fixing body 231 so as to be adjacent from the left and right, and the second case was disposed on the threshing apparatus 5 side. Thereby, while supporting the elongate cylindrical 1st case 75, the 2nd case 229, and the urea mixing tube 239 toward a front-back direction, it is the right side of the threshing apparatus 5, and the 2nd case (229) The tail pipe 83 is disposed behind and connected to the SCR outlet pipe 237.

As shown in FIG. 35, in the 1st modification, the 1st case 75 is made with the longitudinal direction of each of the 1st case 75 and the 2nd case 229 of the waste gas purification apparatus 74 as a front-back direction. And the second case 229 are arranged side by side, and the second case 229 is disposed on the threshing apparatus 5 side. That is, in the 1st modification, the 2nd case 229 is arrange | positioned at the threshing apparatus 5 side, while the 1st case 75 is inside the recess 7a for purification apparatus installation of the grain tank 7 (inside of the right side). ), The first case 75 can be disposed so as to surround the grain tank 7 and the second case 229. Therefore, the 1st case 75 can be arrange | positioned in a high temperature environment by the high temperature arrangement from the engine room 97, and the regeneration process in the 1st case 75 can be maintained at high performance. Further, the path from the SCR outlet pipe (exhaust outlet) 237 of the second case 229 to the tail pipe 83 disposed on the right side of the threshing apparatus 5 can be shortened, so that the tail pipe 83 can be shortened. The SCR outlet pipe 237 can be easily connected.

FIG. 36: is explanatory drawing of the 2nd modified example in the structure with which the exhaust gas purification apparatus 74 (1st case 75 or 2nd case 229) was attached. In the above embodiment shown in FIG. 4 and the like, the cylindrical first case 75 and the second case 229 are arranged side by side from side to side, but in the second modification shown in FIG. 36, the first case connected in a parallel shape. The case 75 and the second case 229 are supported by the case fixing body 231 so as to be adjacent to each other from front to rear, and the urea mixing pipe is disposed between the first case 75 and the second case 229 having a long cylindrical shape from side to side. (239) was placed. At this time, the first case 75 is disposed on the front side of the second case 229 so as to be the engine 14 side. The second case 229 is disposed so that the SCR outlet pipe (exhaust outlet) 237 is on the left side, and the tail pipe 83 is placed on the right side of the threshing apparatus 5 and behind the second case 229. The tail pipe 83 is connected to the SCR outlet pipe 237.

As shown in FIG. 36, in the 2nd modified example, the 1st case 75 and the longitudinal direction of each of the 1st case 75 and the 2nd case 229 of the exhaust-gas purification apparatus 74 are made to the left-right direction. The 2nd case 229 is installed side by side, and the 1st case 75 is arrange | positioned at the engine room 97 side. That is, in the 2nd modification, the 1st case 75 is arrange | positioned at the engine 14 side, and the 2nd case 229 is arrange | positioned at the grain tank 7 side.

In the second modification according to the above configuration, the first case 75 and the second case 229 and the urea mixing pipe 239 can be compactly installed along the whole surface of the grain tank 7 while the second The tail pipe 83 on the right side of the threshing apparatus 5 can be easily connected to the SCR outlet pipe (exhaust outlet) 237 of the case 229. Therefore, the 1st case 75 can be arrange | positioned in a high temperature environment by the high temperature arrangement from the engine room 97, and the regeneration process in the 1st case 75 can be maintained at high performance. In addition, the exhaust path between the engine 14 and the tail pipe 83 is formed in a short manner so that the temperature of the exhaust gas in the exhaust path can be maintained at a high temperature necessary for the purification of the exhaust gas in the exhaust gas purification device 74. have.

In the second modification, as shown in FIG. 36, the purification inlet pipe 81 is provided on the right end side of the first case 75, while the purification outlet pipe 82 is provided on the left end side of the first case 75. In addition, the SCR inlet pipe 236 is provided on the right end side of the second case 229, and the SCR outlet pipe 237 is provided on the left end side of the second case 229. And between the cylindrical 1st case 75 and the 2nd case 229 of the elongate side to side, the cylindrical element mixing pipe 239 of the elongate side to the left and right of each case 75 and 229 is provided. Are installed in parallel. In addition, in the present modification, the purification inlet pipe 81 is provided on the left end side of the first case 75, while the purification outlet pipe 82 is provided on the right end side of the first case 75. The SCR inlet pipe 236 is provided on the left end side of the second case 229, and the SCR outlet pipe 237 is provided on the right end side of the second case 229. The connection to the purification inlet pipe 81 of 75 may be configured to be short-circuited.

In addition to the configuration of the above embodiment, in order to reduce the influence on the peripheral components due to the heat radiation from the exhaust gas purification device 74 serving as a heat source, the heat shield member may be disposed on the outer circumference of the exhaust gas purification device 74. Does not matter. As shown in FIG. 37, by covering the upper surface and left side (threshing apparatus 5 side) of the exhaust-gas purification apparatus 74 with the purification apparatus cover body 261 used as a heat shield plate, the exhaust-gas purification apparatus ( The heat from 74 is blocked to reduce the thermal influence on the threshing apparatus 5 side, while suppressing the temperature drop around the exhaust gas purification apparatus 74. As shown in FIG. 38, the purification apparatus cover body 261 has opened many holes in the side surface part, and suppresses the retention of the air heated around the exhaust gas purification apparatus 74, and a grain tank (7) can be prevented from being excessively heated by the exhaust gas purification device 74.

37 and 38, the lock pin fixing frame 160 is continuously installed from the upper right side of the machine housing frame of the threshing apparatus 5, and the grain tank 7 is fixedly supported on top of the lock pin fixing frame 160. The lock pin 161 is fixed. When the lock arm 162 is provided in the whole surface of the grain tank 7, and the grain tank 7 was accommodated in the accommodation position of the traveling body 1, the lock arm 162 engages with the lock pin 161. As shown in FIG. In addition, a lock release lever (not shown) is provided on the front surface of the grain tank 7, and the lock release lever is connected to the lock arm 162 via the linkage rod 163, and the lock pin 161 is operated by the lock release lever operation. The lock arm 162 is detachably formed from the. The rear part of the grain tank 7 is supported on the longitudinal drawing conveyor 8a, and the grain tank 7 is directed toward the outside of the circumference of the longitudinal drawing conveyor 8a axis line by the lock arm 162 detachment operation of the lock release lever. The right side surface of the threshing apparatus 5 and the back surface of the engine room 97 are comprised so that a lateral movement is possible.

37 and 38, the purification apparatus cover body 261 is supported by the lock pin fixing frame 160, while the left side surface of the grain tank 7 is covered with the heat insulating material 260 to purify the exhaust gas. It is good also as a structure which shields the periphery of the apparatus 74. FIG. That is, by covering a part of the right side and the upper surface of the exhaust gas purification device 74 with the heat insulator 260, and covering the remaining part of the left side and the upper surface of the exhaust gas purification device 74 with the purifier cover body 261. The heat from the exhaust gas purification device 74 can be shielded. Therefore, while the thermal influence on the peripheral components by the exhaust gas purification device 74 can be suppressed, the contact by the operator with the high temperature exhaust gas purification device 74 can be prevented, and the exhaust gas purification device ( The ambient atmosphere of 74 can be maintained at a high temperature by the arrangement from the engine 14. And since the heat insulating material 260 is attached to the recess 7a for installing the purification apparatus of the grain tank 7, the thermal influence by the exhaust gas purification apparatus 74 inside the grain tank 7 can be reduced. .

In addition, as shown in FIG. 39, in addition to providing the heat insulating material 260 in order to suppress the heating to the grain tank 7 by the exhaust gas purification apparatus 74 used as a high temperature heat source, The heat shield plate 262 may be provided continuously from the right edge toward the upper side of the exhaust gas purification device 74. That is, by providing the heat shield plate 262 between the left side surface of the grain tank 7 and the right side surface of the exhaust gas purification device 74, the radiant heat from the exhaust gas purification device 74 is blocked by the heat shield plate 262. It is possible to prevent the grain tank 7 from being heated by the exhaust gas purification device 74.

5: threshing device 7: grain tank
10: driving cabin 31: fuel tank
14: diesel engine 74: exhaust gas purification device
75: first case 81: purification inlet pipe (exhaust gas inlet)
82: purification outlet pipe (exhaust gas outlet) 83: tail pipe
91: engine room frame 92: left pillar (back frame)
94: horizontal frame (back frame) 97: engine compartment
174: urea water tank 175: urea water supply device
229: Second case 236: SCR inlet pipe (exhaust gas inlet)
237: SCR outlet pipe (exhaust gas outlet) 239: urea mixing pipe

Claims (7)

A mowing device, a threshing device, an engine for driving the mowing device or the threshing device, an exhaust gas purifying device for removing nitrogen oxides from the exhaust gas of the engine, a urea water tank for storing urea water, and In the combine equipped with the engine room which internally installs an engine, and the grain tank which carries in harvested grain,
The urea water supply device for installing the exhaust gas purification device behind the engine room and supplying the urea water to the urea water injection part is lower than the urea water injection part for supplying the urea water to the exhaust gas purification device. Install on,
The said grain tank is provided in one side of a base, and is comprised so that rotation is possible toward the said one side with respect to the said gas centering on the rotating shaft,
In the rear of the grain tank, the urea water tank is located on the one side side of the rotation shaft and is fixed to the grain tank at the rear of the grain tank so as to be rotatable with the grain tank. Combines characterized in that. The method of claim 1,
The said exhaust gas purification apparatus is arrange | positioned at the position fitted back and forth by the said engine room and the said grain tank, and the said urea water supply apparatus is arrange | positioned at the position fitted by the said grain tank and the said threshing apparatus. The method of claim 2,
A grain-grain conveyor for conveying the first fraction sorted by the threshing apparatus to the grain tank, and a reduction conveyor conveying to the sorting section of the threshing apparatus for reselecting the second fraction sorted by the threshing apparatus,
The said urea water supply apparatus is fixed to the area | region sandwiched by the said grain grain conveyor and the said reduction conveyor in the said threshing apparatus side surface. The combine characterized by the above-mentioned. The method according to any one of claims 1 to 3,
The grain tank is axially supported from the rear so as to be able to rotate outside the gas,
A combine tank, wherein a fuel tank for storing fuel is disposed behind the threshing apparatus. delete delete delete

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