KR20210136169A - Combine harvester - Google Patents

Abstract

It aims at providing the combine which made it possible to install the exhaust gas purification apparatus compactly. The combine of this invention is the engine 14 which drives the harvesting apparatus 3, the threshing apparatus 5, the harvesting|reaping apparatus 3 or the threshing apparatus 5, and nitrogen oxides in the exhaust gas of the engine 14 It is equipped with the exhaust gas purification apparatus 74 which removes, the engine room 97 which makes the engine 14 built-in, and the grain tank 7 which carries in the harvested grain. The exhaust gas purification device 74 is installed in the rear of the engine room 97 and the urea water supply device 175 for supplying urea water to the exhaust gas purification device 74 is lower than the exhaust gas purification device 74 . install on

Description

Combine {COMBINE HARVESTER}

The present invention relates to a combine such as a combine for collecting grains by mowing a grain stem planted in a field, or a feed combine for collecting grain by mowing a grain stem for feed, and more particularly, to a particulate form contained in exhaust gas of a diesel engine, etc. It relates to a combine equipped with an exhaust gas purification device for removing substances (soot, particulates), or nitrogen oxides (NOx) contained in exhaust gas.

Conventionally, as an exhaust gas purification device (after-treatment device) in the exhaust path of a diesel engine, a case having a built-in diesel particulate filter (hereinafter referred to as a DPF case) and a case having a built-in urea selective reduction catalyst (hereinafter, referred to as a DPF case) A technique is known in which an SCR case is installed, exhaust gas is introduced into the DPF case and the SCR case, and the exhaust gas discharged from the diesel engine is purified (see, for example, Patent Documents 1 to 3). In addition, the conventional combine cuts the unharvested grain stem of the pavement with a blade device, transports the harvested grain stem to the threshing device by the grain stem conveying device, threshes, and collects the grains in the grain tank, and the engine in the traveling body It was mounted, and the DPF case was arrange|positioned in a horizontal attitude|position on the engine upper surface side, and it was comprised so that exhaust gas might be discharged|emitted from an engine toward a DPF case (for example, refer patent document 4).

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

In the prior art, in the structure in which the engine and the exhaust gas purification device (DPF case) are installed close to each other in the engine room, it is necessary to secure an installation space for the exhaust gas purification device (SCR case) around the engine attachment part, so that the engine room volume Alternatively, there is a problem such as the volume of the exhaust gas purification device (DPF case or SCR case) is limited. In addition, in the structure in which the exhaust gas purification device (DPF case or SCR case) is supported outside the engine room, the attachment position of the urea mixing pipe or the exhaust gas purification device connecting the SCR case to the DPF case is limited, and the exhaust gas purification device There is a problem such as not being able to simplify the attachment structure of the . In addition, in a structure in which an exhaust gas purification device (DPF case or SCR case) is installed on a traveling body away from the engine, such as in a freight car, an installation space for the exhaust gas purification device can be easily secured, but the exhaust gas purification device There is a defect that the temperature of the exhaust gas in the interior tends to decrease below a predetermined temperature.

In addition, when the exhaust gas purification apparatus includes a urea selective reduction catalyst, a urea mixing chamber for mixing urea water with 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 installed, not only the exhaust gas purification device but also a urea tank that stores urea water supplied to the urea mixing chamber, and the urea water in the urea water tank are transferred to the exhaust gas purification device A urea water pump, etc. to be supplied to the Therefore, even if the installation space of the exhaust gas purification apparatus is ensured, it is not enough, and the installation place of a urea water tank and a urea water pump is also required. In addition, urea water may freeze under a low-temperature environment, so that the exhaust gas purification process does not function due to freezing of the urea water, and there is a fear that the purification ability may be lowered due to a change in the concentration of the urea water.

Then, this invention is examining these current conditions, and it is trying to provide the combine which improved it.

In order to achieve the said object, this invention is a harvesting apparatus, a threshing apparatus, the engine which drives the said harvesting apparatus or the said threshing apparatus, and the exhaust gas purification apparatus which removes nitrogen oxides in the exhaust gas of the said engine, In a combine having an engine room for installing an engine, and a grain tank for carrying in harvested grain, the exhaust gas purification device is installed behind the engine room, and urea water is supplied to the exhaust gas purification device A urea water supply device is provided below the exhaust gas purification device.

The combine WHEREIN: The said exhaust gas purification apparatus is arrange|positioned at the position pinched|interposed by the said engine room and the said grain tank, and the said urea water supply apparatus is arrange|positioned at the position pinched|interposed by the said grain tank and the said threshing apparatus Does not matter. In addition, a grain conveyor conveying the first product selected by the threshing apparatus to the grain tank, and a reduction conveyor conveyed to the sorting unit of the threshing apparatus in order to re-sort the second product selected by the threshing apparatus It is provided, and in the said threshing apparatus side, you may fix the said urea water supply apparatus to the area|region sandwiched by the said grain conveyor and the said reduction conveyor.

The said combine WHEREIN: The said grain tank is pivotally supported from the rear so that rotation is possible on the outer side of a body, and while arrange|positioning the urea water tank which stores urea water behind the said grain tank, the fuel tank which stores fuel the said threshing apparatus It doesn't matter if it's placed in the back.

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

In the combine, a urea water tank for storing urea water is overlapped with the fuel tank and disposed below the threshing apparatus, and the water supply port of the urea water tank and the oil supply port of the fuel tank are protruded toward the outside of the threshing apparatus Does not matter.

The said combine WHEREIN: While comprising the said exhaust gas purification apparatus with the 2nd case which removes the 1st case which removes the particulate matter in the exhaust gas of the said engine, and the nitrogen oxides in the exhaust gas of the said engine, the said grain tank It has a recessed part in the surface which opposes the said engine room, It does not matter also as what has arrange|positioned the said 1st case and a 2nd case in the recessed part of the said grain tank.

The said combine WHEREIN: You may make the longitudinal direction of each of the said 1st and 2nd case into a front-back direction, and you may make the said 1st and 2nd case side by side side by side. Further, in the combine, an exhaust inlet of the second case is connected to an exhaust outlet of the first case through a urea mixing pipe, and parallel to each of the first and second cases between the first and second cases It does not matter as well as arranging the urea mixing tube.

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, The said fixing member is supported by the support frame erected from the traveling body, and the said exhaust. It is good also as fixing a gas purification apparatus. In addition, the said support frame, the said engine frame, and the said threshing apparatus upper surface support the said fixing member, and it does not matter as what fixes the said exhaust gas purification apparatus.

According to the present invention, since the exhaust gas purification device is disposed at the rear of the engine room, it is possible to arrange the exhaust gas purification device at a position close to the engine and prevent the operator from contacting the exhaust gas purification device which becomes high temperature. can Further, since the exhaust gas from the engine room can be directed to the exhaust gas purification device, the exhaust gas purification device can be disposed in a high-temperature environment required for exhaust gas purification, so that a high purification effect can be maintained in the exhaust gas purification device. have

According to the present invention, since the urea water supply device is disposed below the exhaust gas purification device, the urea water can be refluxed to the urea water tank through the urea water supply device without circulating the urea water after the engine is stopped. Accordingly, it is possible to prevent crystallization of urea water remaining in the urea water supply path or the exhaust gas purifying device after the engine is stopped, so that it is possible to suppress a decrease in the purification capability of the exhaust gas purifying device and deterioration of the device.

ADVANTAGE OF THE INVENTION According to this invention, the capacity|capacitance of a grain tank is securable by effectively using the space around a grain tank, and arrange|positioning an exhaust gas purification apparatus, a urea water supply apparatus, and a urea water tank. Further, since the urea water supply device can be arranged near the exhaust gas purification device, the urea water pipe connecting the urea water supply device and the exhaust gas purification device can be configured in a short length, so that the residual urea water in the pipe can be reduced. It is possible to suppress the crystallization of urea water and the like in advance.

According to the present invention, since the urea water supply device is disposed in the region sandwiched by the 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 can the capacity|capacitance of a grain tank be ensured, but the shape of a grain tank is not complicated, and the design becomes easy.

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 configured in a short length. Further, by disposing the fuel tank and the urea water tank separately from the rear of the traveling body, the respective supply ports of the fuel and the urea water can be easily identified. Moreover, since the difference in piping distance based on opening and closing of a grain tank can be reduced by arrange|positioning a urea water tank in the rotation axis vicinity of a grain tank, urea water piping does not interfere with the opening and closing operation of a 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. In addition, by disposing the urea water tank on the lower side, the water supply position of the urea water tank can be made downward, and the water supply operation becomes easy.

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 and the urea water pipe of the urea water tank installed on the side of the threshing device can be configured in a short length. . Moreover, the urea water tank can be formed in a large capacity, and it can be comprised so that urea water may be replenished to the urea water tank at the time of maintenance work, such as around a grain tank or an engine.

ADVANTAGE OF THE INVENTION According to this invention, a urea water tank can be installed compactly by utilizing the installation space of a fuel tank. In addition, the urea water tank can be supported by utilizing the support structure of the fuel tank. Further, it is possible to improve the replenishment workability by making the fuel supply unit and the urea water supply unit close to each other.

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 a right side view of the same.
It is a front perspective view which shows the structure in an engine room.
It is a perspective view which shows the positional relationship of engine peripheral parts, a grain tank, and a thresher.
6 is an external perspective view showing an engine and an exhaust gas purification apparatus.
Fig. 7 is a rear perspective view of an exhaust gas purification device attachment part;
It is a right side view which shows a part of a threshing apparatus.
9 is an explanatory diagram of urea water supply.
It is a perspective view which shows component arrangement|positioning on the traveling body in the combine used as 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 used as 2nd Embodiment.
14 is a rear perspective view of the combine.
It is a front view of the urea water tank in the same combine.
16 is a right side view of the combine.
It is a perspective view which shows arrangement|positioning of each component in the combine used as 3rd Embodiment.
It is a left side view which shows the inside of the threshing apparatus of the same combine.
It is a perspective view which shows component arrangement|positioning on the traveling body in the combine used as 4th Embodiment.
20 is a rear perspective view of the combine.
Fig. 21 is a diagram showing a modified example of the urea water tank in the combine.
It is a perspective view which shows component arrangement|positioning on the traveling body in the combine used as 5th Embodiment.
It is a front view (left side view of a combine) of the fuel tank and urea water tank of the same 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 the same combine.
Fig. 25 is a side view showing the configuration of the fuel tank and the urea water tank shown in Fig. 24;
Fig. 26 is a side view showing the configuration when the fuel tank and the urea water tank shown in Fig. 24 are separated.
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 the same combine.
Fig. 28 is a side view showing the configuration of the fuel tank and the urea water tank shown in Fig. 27;
Fig. 29 is a front view showing a state when the urea water tank shown in Fig. 27 is filled with urea water.
It is a top view of the combine used as 6th Embodiment.
Fig. 31 is a right side view of the same.
Fig. 32 is a perspective view showing the arrangement of the engine and the exhaust gas purification device.
Fig. 33 is a rear perspective view of an exhaust gas purification device attachment part;
It is a perspective view which shows component arrangement|positioning on a traveling body.
Fig. 35 is a first modification of the arrangement of the exhaust gas purification device.
Fig. 36 is a second modification of the arrangement of the exhaust gas purification device.
It is a front view which shows the structure of the periphery of an engine and an exhaust gas purification apparatus.
Fig. 38 is a perspective view showing the configuration of the periphery of the exhaust gas purification device attachment part;
Fig. 39 is a rear perspective view showing the configuration of the periphery of the exhaust gas purification device attachment part;

<First embodiment>

EMBODIMENT OF THE INVENTION Below, 1st Embodiment which embodied this invention is demonstrated based on FIG. 1-12. With reference to FIGS. 1-3, the whole structure of the combine of embodiment in which the diesel engine was mounted is demonstrated. In addition, in the following description, toward the advancing direction of the traveling body 1, the left side is only called the left, and similarly, the right side is only called the right side toward the advancing direction. 1 to 3 , a traveling body 1 supported by a pair of left and right traveling crawler 2 as a traveling unit is provided. The mowing apparatus 3 for 6 rows of mowing introduced while mowing a grain stem in the front part of the traveling body 1 is a single-acting hydraulic cylinder 4 for raising/lowering, so that raising/lowering adjustment is possible around the mowing rotation fulcrum axis 4a is mounted The threshing apparatus 5 which has the feed chain 6 and the grain tank (grain tank) 7 which store the grain withdraw|derived from the said threshing apparatus 5 are mounted in the traveling body 1 in lateral arrangement shape. Moreover, the threshing apparatus 5 is arrange|positioned on 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.

In addition, a grain discharge conveyor 8 capable of turning through a bell take-out conveyor 8a is installed 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 (9) to the carrier or container of the track. It is the right side of the harvesting apparatus 3, and the driving|operation cabin 10 is provided in the front side of the grain tank 7. A cabin rotation fulcrum shaft 10a is installed in the lower front portion of the driving cabin 10, and the lower front portion of the driving cabin 10 is rotatably supported on the traveling body 1 through the cabin rotation fulcrum shaft 10a. , The driving cabin 10 is movably installed toward the outboard front side, and it is comprised so that the driving cabin 10 may be rotated to the front side around the cabin rotation fulcrum axis 10a.

In the driving cabin 10, the steering wheel 11, the driver's seat 12, the main gear lever 15, the auxiliary gear lever 16, and the threshing clutch lever 17 for turning on/off the threshing clutch. And, the harvesting clutch lever 18 which turns on/off a harvesting clutch is arrange|positioned. A diesel engine 14 as a power source is disposed on the traveling body 1 below the driver's seat 12 . Further, in the driving cabin 10 , a step on which the operator boards, a steering wheel column provided with the steering wheel 11 , a lever column provided with each of the levers 15 , 16 , 17 , 18 , and the like are arranged.

As shown in FIG. 1 , the track frames 21 on the left and right are disposed on the lower surface side of the traveling body 1 . The track frame 21 includes a drive sprocket 22 that transmits the power of the engine 14 to the traveling crawler 2, a tension roller 23 that maintains the tension of the traveling crawler 2, and a traveling crawler 2 A plurality of track rollers (24) for holding the grounding side of , and an intermediate roller (25) for 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 traveling crawler 2 is grounded by the track roller 24. side, and the non-grounded side of the traveling crawler 2 is supported by the intermediate roller 25 .

1 and 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 outer side side of the threshing apparatus 5 left side. It is comprised so that diesel fuel can be replenished into the fuel tank 31 from the. That is, the fuel tank 31 is provided on the traveling body 1 at the position below the straw discharge cutter 65 of the rear part of the threshing apparatus 5, and the oil supply port 32 (refer FIG. 1 and FIG. 2). ) is connected to the left side of the threshing apparatus 5, and oil supply is made possible from the side outside the machine.

As shown in Figs. 1 and 2, in the mowing frame 51 connected to the mowing rotation fulcrum shaft 4a of the mowing device 3, a barrican-type mowing blade device ( 52) has been installed. In front of the harvesting frame 51, the rice straw raising apparatus 53 for 6 trillion which raises the uncultivated grain stem planted in the pavement is arrange|positioned. Between the rice straw raising apparatus 53 and the front-end part (transfer front-end|tip side) of the feed chain 6, the grain stem conveying apparatus 54 which conveys the harvesting grain stem mowed by the blade apparatus 52 is arrange|positioned. In addition, in front of the lower part of the rice straw raising device 53, a grass-bowing body 55 for 6 trillions for cutting an uncut grain stem is protruded. It is comprised so that the non-removing grain stem implanted in the field with the mowing apparatus 3 may be mowing|mowing continuously, moving the inside of a field.

Next, with reference to FIG. 1 and FIG. 2, the structure of the threshing apparatus 5 is demonstrated. 1 and 2, the threshing apparatus 5 includes a barrel 56 for threshing a grain stem, and a rocking separator 57 and a tuyere fan ( 58), the processing barrel 59 which reprocesses the threshing discharge discharged|emitted from the rear part of the barrel 56, and the dust exhaust fan 60 which discharges the dust exhaustion of the rear part of the rocking|fluctuation sorting board 57 are provided. Moreover, the grain stem conveyed by the grain stem conveying apparatus 54 from the harvesting apparatus 3 is carried over by the feed chain 6, it is carried in to the threshing apparatus 5, and is threshed with the barrel 56.

As shown in Fig. 1, on the lower side of the rocking sorting board 57, the No. 1 conveyor 61 for taking out the grains (the No. 1) sorted by the shaking classifying board 57, and the No. 2 products such as grains with a branch diameter A No. 2 conveyor 62 for taking out is provided. The rocking sorting board 57 is configured so that the threshing products leaked from the support net 67 installed below the barrel 56 are rocked and sorted (specific gravity) by the feed pan 68 and the chaff sieve 69. . As for the grains which fell 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 No. 1 conveyor 61. The grains taken out from the No. 1 conveyor 61 are carried in to the grain tank 7 through the grain conveyor 63, and are collected in the grain tank 7.

Moreover, as shown in FIG. 1, the shaking|fluctuation sorting board 57 is comprised so that the 2nd thing, such as a grain with a diaper diameter, may fall from the chaff sheave 69 to the 2nd conveyor 62 by rocking|fluctuation sorting. A sorting fan 71 for inflating the second product that falls below the chaff sieve 69 is provided. As for the second product which has fallen from the chaff sieve 69, the dust and straw debris in the grain are removed by the sorting wind from the sorting fan 71, and fall to the second conveyor 62. The terminal end of the second conveyor 62 is connected in communication with the upper surface side of the feed pan 68 via the reduction conveyor 66, and the second product is returned to the upper surface side of the swinging sorting plate 57 and re-sorted.

On the other hand, as shown in FIGS. 1 and 2 , a straw discharging chain 64 and a straw discharging cutter 65 are arranged on the rear end side (transfer end side) of the feed chain 6 . The discharged straw (straw from which grain has been decomposed) is discharged from the rear end side of the feed chain 6 to the straw discharging chain 64 is discharged to the rear of the traveling body 1 in a long state, or the threshing device 5 ), after being cut to an appropriate length with a straw discharging cutter 65 installed in the rear part, it is configured to be discharged to the lower rear of the traveling body 1 .

As shown in Figs. 4 and 5, the grain tank 7 is a concave portion 7a for installing a purification device by a shape in which the front left is notched, and a concave for installing a grain discharge conveyor by a groove shape in the front-rear direction on the upper left side. It is provided with the part 7b and the recessed part 7c for grain conveyor installation by the shape which formed the step along the up-down direction in the center of the left side. A space is formed in the engine room 97 rear in the recessed part 7a for purification apparatus installation of the grain tank 7 front surface, and the exhaust gas purification apparatus 74 is arrange|positioned. The grain discharge conveyor 8 which accommodated the front-end|tip in the conveyor support body in the recessed part 7b for grain discharge conveyor installation of the upper surface of the grain tank 7 is accommodated along the recessed part 7b for grain discharge conveyor installation. In addition, the grain conveyor 63 is fixed along the grain conveyor installation concave portion 7c in the grain conveyor installation concave portion 7c on the left side of the grain tank 7, and is installed on the grain conveyor installation concave portion 7c upper portion. connected by one receptacle.

4 and 11, the grain discharge conveyor 8 is rotatably supported on the upper end side of the longitudinal take-out conveyor (transverse conveying conveyor) 8a, The transfer terminal side of the grain discharge conveyor 8 A rice straw inlet (9) is installed in the While arranging the lateral transfer conveyor 8b forward and backward at the bottom of the grain tank 7, the lower end (base end) side of the longitudinal take-out conveyor 8a is connected to the rear end of the lateral transfer conveyor 8b. Moreover, 7 d of aircraft outer side bottom plates and an aircraft side bottom plate (not shown) are provided in the bottom of the grain tank 7, and an aircraft outer side bottom plate 7d and an aircraft side bottom plate are inclined toward the lateral transfer conveyor 8b, and grain The grain inside the tank 7 is made to flow in the direction of the transverse conveyer 8b. The lateral transfer conveyor 8b is provided along the bottom front and back of the grain tank 7, and conveys the grain flowing down along the bottom plate of the grain tank 7 to the rear longitudinal take-out conveyor 8a.

The vertical take-out conveyor 8a is connected with the rear end of the lateral transfer conveyor 8b protruding from the rear end face of the grain tank 7, and is connected toward the grain tank 7 upper side along the grain tank 7 rear end face. The vertical take-out conveyor 8a connects the lower end (base end) side with the transverse conveying conveyor 8b, and by fixing an upper part to the grain tank 7 rear end surface, it stands up from the grain tank 7 back, and is installed. Moreover, the lower end of the longitudinal take-out conveyor 8a is supported on the traveling body 1, the grain tank 7 is made lateral movement possible toward the machine outer side around the longitudinal take-out conveyor 8a axial center line, and the threshing apparatus 5 ) The right side and the rear of the engine room 97 are configured to be openable. Moreover, the rear cover 30 which covers the circumference|surroundings of the bell take-out conveyor 8a is provided in the back of the grain tank 7 so that attachment or detachment is possible, and the bottom cover body is attached to the outer surface of the bottom plate 7d outside the machine of the grain tank 7 (165) is detachably installed.

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

Further, the first case 75 has an entry case 76 and an exit case 77 . A diesel oxidation catalyst 79 such as platinum that generates _{nitrogen dioxide (NO 2} ) is disposed inside the inlet case 76 . A soot filter 80 having a honeycomb structure is disposed inside the inlet case 76 and the outlet case 77 to continuously oxidize and remove the collected particulate matter (PM) at a relatively low temperature. Particulate matter 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 movement direction of the exhaust gas in the inlet case 76 and the outlet case 77 In addition to the removal of substances (PM), carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas are reduced. On the other hand, the SCR catalyst 232 and the oxidation catalyst 233 are arranged in series in the movement direction of the exhaust gas in the second case 229 . The SCR catalyst 232 and the oxidation catalyst 233 in the second case 229 are configured to reduce nitrogen oxides (NOx).

Moreover, as shown in FIGS. 4-7, the 1st case 75 and the 2nd case 229 are comprised in the elongate cylindrical shape extended long in the left-right direction of the body. A purification inlet pipe 81 for introducing exhaust gas and a purification outlet pipe 82 for discharging exhaust gas are provided on both sides of the cylindrical shape of the first case 75 (one end and the other end side in the exhaust gas movement direction). . Similarly, an SCR inlet pipe 236 for introducing exhaust gas and an SCR outlet pipe 237 for discharging exhaust gas are provided on both sides of the second case 29 (one end and the other end in the exhaust gas movement direction). .

Moreover, as shown in FIGS. 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. . The exhaust gas of the diesel engine 14 is introduced into the first case 75 by communicating the purification inlet pipe 81 through the exhaust connecting pipe 119 to the exhaust gas outlet side of the supercharger 118 . A urea mixing pipe 239 connecting the SCR inlet pipe 236 to the purification outlet pipe 82 is connected, and exhaust gas from the first case 75 through the urea mixing pipe 239 into the second case 229 . is configured to introduce. In addition, the exhaust gas outlet side of the supercharger 118 and the exhaust connecting pipe 119 are connected by a bendable and stretchable accordion-shaped connecting pipe 98, so that the engine 14 vibration on the supercharger 118 side is connected to the exhaust. It is configured so as not to be transmitted to the tube 119 side.

On the other hand, the purification outlet pipe 82 and the urea water injection part 240 of the urea mixing pipe 239 are detachably bolted by a pipe flange. The inlet case 76 and the outlet case 77 are detachably connected by fastening bolts of a plurality of sets of thick plate-shaped intermediate flange bodies 84 , and the outlet case 77 is separated to form 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 established toward the body upper side, and the exhaust gas of the diesel engine 14 (each cylinder) is After being introduced into the first case 75 from the supercharger 118 and moving from the first case 75 to the urea mixing pipe 239, the urea water in the urea water tank 174 to be 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.

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 is continuously oxidized and removed by _{nitrogen dioxide (NO 2 ).} . In addition to the removal of particulate matter (PM) in exhaust gas of diesel engine 14, content of carbon monoxide (CO) and hydrocarbon (HC) in exhaust gas of diesel engine 14 is reduced. Next, inside the urea mixing pipe 239 , urea water is injected into the exhaust gas from the diesel engine 14 from the urea water injection nozzle body of the urea water injection unit 240 , and ammonia generated by hydrolysis is mixed In the exhaust gas in the second case 229, the nitrogen oxides (NOx) content is reduced by the SCR catalyst 232 and the oxidation catalyst 233 for urea selective catalytic reduction. In the first case 75 and the second case 229 , the exhaust gas of the diesel engine 14 is purified and discharged from the tail pipe 83 to the outside.

Next, as shown in FIGS. 4 and 6, the engine room frame 91 as a body frame is erected on the traveling body 1 of the grain tank 7 front, and it is installed, and it is the engine room frame 91 with the engine room. (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 inside. In addition, cooling components such as a radiator for water cooling (not shown) and a cooling fan 115 are installed inside the engine room 97 on the diesel engine 14 side. External air is introduced from the right outer side of the combine gas toward cooling parts such as a radiator (not shown) with a cooling fan 115, while the heat of the diesel engine 14 is discharged toward the threshing apparatus 5 side. have.

In addition, the right side, the rear side, and the upper surface side of the diesel engine 14 and the cooling part are surrounded by the engine room frame 91 , and the right outer side of the engine room frame 91 by the cooling fan 115 of the diesel engine 14 . A threshing device as a working part adjacent to the engine room frame 91 (engine room 97) where the warmth after cooling the diesel engine 14 and cooling parts is introduced into the engine room 97 from the outside air for cooling. (5) It is comprised so that it may discharge toward the right side.

The engine room frame 91 is an angle in which both ends are integrally fixed to a square pipe-shaped post body 92 on the left side, an inverted U-shaped post body 93 on the right side, and the left and right supports 92, 93. It has a pipe-shaped transverse frame (94). The square pipe-shaped horizontal frame 94 is connected to and fixed to a square pipe-shaped frame 93a having one end connected to the upper end of the square pipe-shaped support body 92 and the other end fixed to the inverted U-shaped support body 93 above. has been

Further, a rubber press-welding body (not shown) provided on the rear portion of the bottom face of the driving cabin 10 is brought into contact with the upper surfaces of the pedestals 96 on the left and right of the transverse frame 94 from above, and the transverse frame 94 . The rear part of the driving cabin 10 is supported on each pedestal 96 in the vertical direction so that contact and separation are possible. The diesel engine 14 is installed in the engine room 97 formed by the driving|operation cabin 10 bottom face side and the engine room frame 91. As shown in FIG. Moreover, as shown in FIG. 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 the storage position through the conveyor support body 90.

In addition, an air cleaner 123 for supplying outside air to the diesel engine 14 and a pre-cleaner 124 for introducing outside air into the air cleaner 123 are provided. While arrange|positioning the air cleaner 123 in the right side of the exhaust gas purification apparatus 74 among the upper surfaces of the engine room 97, it is the grain tank 7 front right side, In the engine room 97 upper side, the pre-cleaner 124 ), and the air cleaner 123 is connected to the pre-cleaner 124 through the air supply pipe 125 . It is comprised so that combustion air may be introduce|transduced into the compressor case 118a of the supercharger 118 of the diesel engine 14 through the air cleaner 123 from the pre-cleaner 124. The air cleaner 123 is fixed at the rear right side of the transverse frame 94 of the engine room frame 91 , and is positioned at the front right side of the exhaust gas purification device 74 .

4-6 etc., the supercharger 118 is provided in the upper front side of the diesel engine 14, The compressor case 118a which built-in the blower wheel is provided on the right side, while the turbine is provided on the left side. A turbine case 118b in which a wheel is incorporated is provided. Then, the intake air intake 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 as a post-treatment device through an accordion-shaped exhaust inlet pipe 98 in which the exhaust outlet pipe 99 installed at the left end of the turbine case 118b is bendable. (81)) is connected to the exhaust connection pipe 119 connected.

3 to 6, the exhaust gas purification device 74 including the first case 75 and the second case 229, and the air cleaner 123 and the pre-cleaner 124 are located in the engine room. On the rear surface of the frame 91, the engine 14 is divided into left and right, and arranged. That is, with respect to the supercharger 118 in front of the engine 14, the air cleaner 123 and the pre-cleaner 124 serving as an intake system are arranged on the compressor case 118a side on the right side, while the turbine case 119b on the left side. ) side, an exhaust gas purification device 74 serving as an exhaust system is disposed. Therefore, since the intake path and the exhaust path of the engine 14 having the supercharger 118 are divided into left and right and arranged, the intake path and the exhaust path can be configured as a short path, and the high-temperature exhaust gas passes through The intake path may be spaced apart from the exhaust path and disposed.

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 a first case (DPF) 75 and a second case (SCR) 229 in parallel by a case fixing body 231 to form a unit. On the case fixing body 231 , the first case 75 is detachably fixed with a plurality of fastening bands 85 , and the second case 229 can be detachably fixed with a plurality of fastening bands 230 . fasten it tightly That is, by bolting both ends of each of the plurality of fastening bands 85 and 230 to the case fixing body 231 , the first case 75 and the second case 229 are parallel to the case fixing body 231 . add it to

The exhaust gas purification apparatus 74 is supported on the traveling body 1 by fixing the case fixing body 231 having the first case 75 and the second case 229 mounted on the upper surface to the support 250 . . As shown in FIGS. 4-7, the support 250 is arrange|positioned below the recessed part 7a for purification apparatus installation provided in the front left side (threshing apparatus 5 side) of the grain tank 7, and exhaust The gas purifier 74 is supported from the engine room 97 over the purifier installation recess 7a. As for the support 250, as shown in FIGS. It is supported by the upper position in the recessed part 7a for purifier installation of the grain tank 7 by being fixed by the support frame 251 erected from the base|substrate 1.

The front side of the support 250 is connected to the transverse frame 94 of the engine room frame 91 with the other end of the bridge frame 252 having one end fixed on the back side of the support 250 as shown in FIGS. 4 and 6 . It is supported by the engine room frame (91) by making it. In addition, as shown in FIG. 5, the left edge of the support 250 is connected through the right part (threshing upper surface frame of the upper right side of the thresher housing) and the attachment adjustment frame 253 of the upper surface of the threshing apparatus 5, threshing apparatus It is supported on the right side of (5). In addition, as shown in FIG. 7 , the right edge of the support 250 is supported on the support frame 251 by connecting the upper end of the support frame 251 and the crossbar frame 254 .

As shown in FIGS. 4 and 5 , the bridge frame 252 is installed from the support 250 toward the lateral frame 94 at a position between the air cleaner 123 and the purification inlet pipe 81 . has been Thereby, not only can the space for the connection between the accordion-shaped exhaust inlet pipe 98 arranged below the horizontal frame 94 and the purification inlet pipe 81 of the first case 75 be secured, but 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 is The influence of exhaust heat from the exhaust path can be reduced.

As shown in FIGS. 4-7, the grain tank 7 has the recessed part 7a for purification apparatus installation in the surface which opposes the engine room 97, The recessed part for purification apparatus installation of the grain tank 7 At 7a, an exhaust gas purification device 74 with a first case 75 and a second case 229 is disposed. Thereby, between the grain tank 7 and the engine room 97, the exhaust gas purification apparatus 74 used as high temperature while the exhaust gas purification apparatus 74 can be arrange|positioned in the position close to the engine 14. It is possible to prevent workers from coming into contact with the In addition, since the exhaust heat from the engine room 97 can be guided to the exhaust gas purification device 74, the exhaust gas purification device 74 is disposed in a high-temperature environment required for exhaust gas purification, and the exhaust gas purification device ( 74), a high purification effect can be maintained.

At this time, as shown in FIGS. 4-7, from the threshing apparatus 5 to the recessed part 7a for purification apparatus installation of the grain tank 7, the 1st case 75 and the 2nd case 229 are horizontal , 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 purifying device 74 can be compactly disposed at a position higher than the engine 14 , and high-temperature exhaust from the engine 14 is possible. It can be set as the structure which guides gas to the exhaust gas purification apparatus 74 easily. In addition, by arranging the exhaust gas purification device 74 at a high position, it is possible to prevent water generated by dew condensation or the like due to a drop in temperature when the engine 14 is stopped from accumulating in the exhaust gas purification device 74 .

4 to 7, the first case 75 and the second case 229 of the exhaust gas purification device 74 are connected in parallel with the case fixing body 231, and the first The exhaust inlet of the second case 229 is connected to the exhaust outlet of the case 75 through the urea mixing pipe 239, and the first and second cases 75 are between the first and second cases 75 and 229. , 229), the urea mixing pipe 239 is disposed in parallel to each. Thereby, the 1st case and the 2nd case, and a urea mixing pipe and an integral unit structure are comprised, and the exhaust gas purification apparatus 74 is compact inside the recessed part 7a for purification apparatus installation in the grain tank 7 front. can be installed easily. Therefore, while being able to ensure the installation space of the exhaust gas purification apparatus 74 easily, the recessed part 7a for purification apparatus installation of the grain tank 7 is comprised narrowly, and grain storage of the grain tank 7 is carried out. capacity can be obtained.

The first and second cases 75 and 229 of the exhaust gas purifying device 74 are arranged side by side with the longitudinal direction of each of the first and second cases 75 and 229 as the front-back direction, and the first and second cases 75 and 229 are arranged side by side, the first case (75) is arrange|positioned at the threshing apparatus 5 side. By arrange|positioning the 1st case 75 on the threshing apparatus 5 side, and arrange|positioning the 2nd case 229 inside the recessed part 7a for purification apparatus installation of the grain tank 7, the 2nd case 229 And while being able to arrange|position so that the urea mixing pipe 239 may be covered with the grain tank 7, the 1st case 75 can be arrange|positioned in the position close to the exhaust port of the engine 14. Accordingly, the exhaust path from the engine 14 to the first case 75 is configured as a short path, and the regeneration process in the first case 75 can be maintained at high performance. Moreover, the 2nd case 229 and the urea mixing pipe 239 can be arrange|positioned in the high temperature environment surrounded by the grain tank 7 of the engine room 97 rear, and while preventing freezing of urea water, the 2nd The purification capability of the case 229 can be maintained to a high degree.

7 to 12, a urea water tank 174 for storing urea water (a urea water solution for selective catalytic reduction), and urea water in the urea water injection unit 240 of the urea mixing pipe 239 A urea water supply device 175 for supplying is provided. The urea water supply device 175 supplies the urea water in the urea water tank 174 to the urea water injection unit 240 of the urea mixing pipe 239, so that the urea water injection valve 178 of the urea water injection unit 240 is ) from the urea water is sprayed into the urea mixing pipe 239 .

As shown in FIG. 9 , the urea water supply device 175 includes 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 is connected to the urea water supply pipe between the urea water tank 174 and the urea water supply pipe. 179 and the urea water return pipe 180 are connected. Furthermore, the engine controller 181 which executes fuel injection control of the diesel engine 14, etc., and the urea injection controller 182 which controls the urea water supply apparatus 175 or the urea water injection valve 178 are provided. .

Then, a 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 amount sensor 184 of the urea water tank 174 , and the engine controller 181 and The urea injection controller 182 is connected, and it is comprised so that urea water may be supplied into the urea mixing pipe 239 according to the operating condition of the diesel engine 14, etc. at an appropriate time.

First, the attachment structure of the urea water supply device 175 is demonstrated. 7 and 8, the urea water supply apparatus 175 is arrange|positioned at the height position used between the threshing apparatus 5 and the grain tank 7, and becomes lower than the exhaust gas purification apparatus 74. That is, the urea water supply device 175 is fixed at a lower position than the urea water injection valve 178 . Therefore, after stopping the injection of the urea water, the urea water remaining in the urea water injection pipe 177 or the like due to the elevation 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 can also be refluxed.

10 and 12, while installing the exhaust gas purification apparatus 74 between the threshing apparatus 5 and the grain tank 7 behind the engine room 97, the exhaust gas purification apparatus 74 ), a 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 exhaust heat from the engine 14. , it is possible to suppress the deterioration of the quality of the urea water.

Moreover, as shown in FIGS. 10 and 12, the exhaust gas purification apparatus 74 is arrange|positioned at the position pinched|interposed back and forth by the engine room 97 and the grain tank 7, the grain tank 7 and the threshing apparatus ( 5), the urea water supply device 175 is disposed at the position sandwiched by the ? The capacity of the grain tank 7 can be ensured by effectively using the space around the grain tank 7, and arranging the exhaust gas purification apparatus 74 and the urea water supply apparatus 175. Further, since the exhaust gas purification device 74 and the urea water supply device 175 can be arranged at a short distance, a urea water pipe (urea water) connecting the exhaust gas purification device 74 and the urea water supply device 175 . The injection pipe 177) may be configured in a short length.

7 and 8, the urea water supply apparatus 175 in the area|region pinched|interposed by the grain conveyor 63 and the reduction conveyor 66 in the threshing apparatus 5 right side (grain tank 7 side) side. ) is fixed. Thereby, since the urea water supply apparatus 175 can be arrange|positioned near the exhaust gas purification apparatus 74 located in the grain tank 7 front surface adjacent to the threshing apparatus 5, from the urea water tank 174 A urea water pipe (urea water injection pipe 177) connecting up to the urea water injection unit 240 may be configured in a short length. Moreover, the exhaust gas purification apparatus 74 and the urea water supply apparatus 175 can be arrange|positioned in the flow path of the exhaust air comprised between the threshing apparatus 5 and the grain tank 7 of the engine room 97 rear. Therefore, the SCR system can be operated under an optimal temperature environment, such as being able to prevent freezing of urea water.

In the present embodiment, as shown in FIGS. 7 and 8 , the urea water supply device 175 is being fixed at a position in front of the grain conveyor 63 and below the reduction conveyor 66 . That is, the urea water supply device 175 is fixed to the right side of the threshing device 5, and is disposed at a position between the tuyere fan 58 and the No. 1 conveyor 61 in 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 conveyor 63 and the reduction conveyor 66 intersecting each other, and the cover body 58a covering the right suction port of the tuyere fan 58 . .

On the other hand, the grain tank 7 is provided without the grain conveyor 63 and the reduction conveyor 66 and buffer. Therefore, by arrange|positioning the urea water supply apparatus 175 in the area|region surrounded by the grain conveyor 63 and the reduction conveyor 66, the urea water supply apparatus 175 is the grain tank 7 and the threshing apparatus 5 without buffer. It can be fixed to a side surface, it is not necessary to change the shape of the grain tank 7, and the capacity|capacitance of the grain tank 7 is securable.

Next, with reference to FIG. 8, the modified example of the installation position of the urea water supply apparatus 175 arrange|positioned in the area|region sandwiched by the grain conveyor 63 and the reduction conveyor 66 is demonstrated. As shown in Fig. 8, the urea water supply device 175 may be installed in a position that is in front of the grain conveyor 63 and below the reduction conveyor 66, and the outlet of the grain conveyor 63 as shown in an imaginary line and It arranges at the height position used as the lower side of the exhaust gas purification apparatus 74 by arrange|positioning at the same height position.

In addition, as shown by the imaginary line in FIG. 8, you may install the urea water supply apparatus 175 in either the upper and lower sides of the reduction conveyor 66 behind the grain conveyor 63. Moreover, in the case where the grain conveyor 63 and the reduction conveyor 66 are installed side by side without intersecting in the right side of the threshing apparatus 5, the urea water supply apparatus 175 between the 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 at the back of the grain tank 7, while the fuel tank 31 is arrange|positioned behind the threshing apparatus. While the oil supply port 32 of the fuel tank 31 is protruded toward the left side, the water supply port 174a of the urea water tank 174 is protruded toward the right side. Specifically, the urea water tank 174 is provided with a water supply port 174a from the outer side toward the rear (right oblique rear), and is vertically disposed between the paper take-out 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 with respect to the water supply port 174a from the outside.

As shown in FIGS. 10-12, the urea water tank 174 is arrange|positioned perpendicularly|vertically which made the longitudinal direction the up-down direction, and is below the right edge (outer edge) of the rear end face of the grain tank 7 is fixed And since the water supply port 174a protrudes toward the right side on the opposite side to the oil supply port 32 facing to the left side of the traveling body 1, the oil supply operation to the fuel tank 31 or to the urea water tank 174 is carried out. When performing a water supply operation, erroneous judgment between the oil supply port 32 and the water supply port 174a can be prevented. In addition, since the water supply port 174a protrudes backward in an inclined direction, the enclosing amount of 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 performed at the same time. have.

As shown in FIG. 10 and FIG. 11, the urea water tank 174 is arrange|positioned perpendicularly|vertically around the longitudinal take-out conveyor (transverse conveyance conveyor) 8a behind the grain tank 7. As shown in FIG. The urea water tank 174 is arrange|positioned inside the rear cover 30, and is attached with respect to the paper take-out conveyor 8a. As shown in FIGS. 10 and 12 , the urea water tank 174 is through the urea water supply pipe 179 and the urea water return pipe 180 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. That is, since it is possible to arrange the exhaust gas purification device 74, the urea water supply device 175 and the urea water tank 174 by utilizing the space around the grain tank 7, the capacity of the grain tank 7 can be obtained

As shown in FIGS. 10 and 12, the exhaust gas purification apparatus 74 is arrange|positioned in the grain tank 7 front periphery, the urea water supply apparatus 175 is arrange|positioned in the grain tank 7 side, urea water The tank 174 is arrange|positioned at the grain tank 7 back. 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 in a short length.

As shown in FIG. 12, the grain tank 7 supports the grain tank 7 rear part on the longitudinal take-out conveyor 8a, and a lateral movement is possible toward the machine outer side around the longitudinal take-out conveyor 8a axis line. Consists of. The right side surface of the threshing apparatus 5 and the engine room 97 rear surface can be opened by rotating the grain tank 7 centering on the vertical rotation axis of the bell take-out conveyor 8a to vertical circumference outboard side. Since the urea water tank 174 is installed around the bell take-out conveyor 8a, the connection part of the urea water supply pipe 179 and the urea water return pipe 180 is arranged in the vicinity of the rotation point of the grain tank 7 can And the urea water supply pipe 179 and the urea water return pipe 180 are made to be piped by diverting the back surface from the left side surface of the grain tank 7 . Therefore, while the piping distance from the urea water tank 174 to the urea water supply apparatus 175 becomes short at the time of grain tank 7 opening compared with the time of grain tank 7 storage, opening and closing of the grain tank 7 This can reduce the difference in piping distance.

Moreover, while opening by the lateral movement of the grain tank 7, the exhaust gas purification apparatus 74 and the urea water supply apparatus 175 of the engine room 97 rear can be approached easily, while grain tank ( 7), it becomes inaccessible to the exhaust gas purification device 74 and the urea water supply device 175 when stored. Therefore, since it becomes impossible to contact with respect to the exhaust gas purification apparatus 74 etc. which become high temperature during operation at the time of grain tank 7 storage, while being able to ensure the safety of an operator, it is grain 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.

<Second embodiment>

Next, a second embodiment embodying the present invention will be described with reference to FIGS. 13 to 16 . In addition, unlike 1st Embodiment, unlike 1st Embodiment, the combine in this embodiment arranges the urea water tank 174 behind the grain tank 7 horizontally from the lower side of the grain tank 7. Since it is the same structure as the combine in 1st Embodiment about another structure, the detailed description is abbreviate|omitted and the structure concerning the urea water tank 174 is demonstrated below.

As the combine in this embodiment is shown in FIG. 13, the exhaust gas purification apparatus 74 is arrange|positioned in the grain tank 7 front periphery, and the urea water supply apparatus 175 is the grain tank 7 side. , and the urea water tank 174 is disposed behind the grain tank 7 . In addition, by disposing the fuel tank 31 and the urea water tank 174 to the left and right at the rear of the traveling body 1, the fuel supply port 32 and the urea water supply port 174a are each easily identified. is doing with

As shown in FIGS. 13-15, the urea water tank 174 is being fixed to the bottom plate of the grain tank 7 by horizontal arrangement, and the rear end part is projecting rearward rather than the grain tank 7. That is, the rear end portion of the urea water tank 174 is disposed in the vicinity of the connection portion of the vertical take-out conveyor (8a) and the lateral transfer conveyor (8b). The left side of the grain tank 7 through the urea water supply pipe 179 and the urea water return pipe 180 which are piping the rear end part of the urea water tank 174 between the threshing apparatus 5 and the grain tank 7 It is connected to the urea water supply device 175 disposed in the.

As shown in FIGS. 14 and 15, the tank support body 173 is provided in the outer surface of 7 d of machine outer side bottom plates of the grain tank 7, and the machine outer side of the grain tank 7 through the tank support body 173. The urea water tank 174 is supported on the outer surface of the bottom plate 7d. The bottom cover body 165 is detachably provided on the outer surface of the bottom plate 7d on the outside of the grain tank 7 , and the urea water tank 174 is disposed on the side of the plane of the bottom cover body 165 . A water supply port 174a is disposed on the right side of the urea water tank 174 toward the right side (outside the aircraft side). At this time, by forming an opening in the rear cover 30 and protruding the water supply port 174a of the urea water tank 174 to the outside of the aircraft side, it is possible to easily supply water from outside the aircraft.

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. The rear end part 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 to the urea water supply device 175 disposed in the. Therefore, while the piping distance from the urea water tank 174 to the urea water supply apparatus 175 becomes short at the time of grain tank 7 opening compared with the time of grain tank 7 storage, opening and closing of the grain tank 7 This can reduce the difference in piping distance.

As shown in FIG. 16, the urea water supply apparatus 175 is arrange|positioned between the threshing apparatus 5 and the grain tank 7 WHEREIN: It arrange|positions at the height position used below the exhaust gas purification apparatus 74. Further, the urea water supply device 175 is disposed at a position higher than the urea water tank 174 by offsetting it in the front-back direction (or left-right direction). That is, the urea water supply device 175 is fixed to 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, after stopping the injection of the urea water, the remaining The urea water may be refluxed 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 remaining due to the difference in elevation between the urea water tank 174 and the urea water supply device 175 after the injection of the urea water is stopped. The urea water may be refluxed to the urea water tank 174 . Therefore, as shown in FIG. 16, by arranging the urea water supply device 175 at a height position between the exhaust gas purification device 74 and the urea water tank 174, the urea water supply device 175 after the engine is stopped. ), urea water can be refluxed to the urea water tank 174 without being circulated, so that the urea water return pipe 180 can be omitted.

<Third embodiment>

Next, a third embodiment embodying the present invention will be described with reference to FIGS. 17 and 18 . In addition, the combine in this embodiment arranges the urea water tank 174 in the lower space of the threshing apparatus 5 unlike 1st and 2nd embodiment. Since it is the same structure as the combine in 1st and 2nd embodiment about another structure, the detailed description is abbreviate|omitted and the structure concerning the urea water tank 174 is demonstrated below.

As shown in FIG. 17 and FIG. 18, the urea water tank 174 is arrange|positioned at the lower part of the thresher frame 36 which comprises the frame of the threshing apparatus 5. As shown in FIG. Utilizing the space under the thresher frame 36, the urea water tank 174 can be installed compactly, and the urea water tank 174 is formed in a large capacity, around the grain tank 7 or around the engine 14 It can be configured so that urea water can be replenished to the urea water tank 174 at the time of such maintenance work.

17 and 18, the urea water supply apparatus 175 is arrange|positioned on the right side surface (grain tank 7 side) of the threshing apparatus 5, The urea water tank 174 and the urea water supply apparatus The piping path (the urea water supply pipe 179 and the urea water return pipe 180) connecting the 175 may be configured in a short length. Therefore, the piping path from the exhaust gas purification apparatus 74 to the urea water tank 174 can be shortened, and while pressure-feeding of the urea water in each piping 177,179, 180 can be smoothed, recrystallization It is possible to suppress deterioration of the quality of the urea water due to burning or freezing. Since the exhaust gas purification apparatus 74 is arrange|positioned between the threshing apparatus 5 and the grain tank 7, the space around the threshing apparatus 5 is utilized, and the exhaust gas purification apparatus 74, the urea water supply apparatus ( 175) and the urea water tank 174 can be arranged compactly, thereby improving the maintainability and assembly of the SCR system.

In addition, the urea water supply device 175 is fixed to a position higher than the urea water tank 174 and lower than the exhaust gas purification device 74 . Therefore, after the injection of the urea water is stopped, the remaining urea water can be refluxed to the urea water tank 174 due to the elevation difference between the urea water tank 174 and the urea water supply device 175 . Therefore, the urea water can be refluxed 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.

17 and 18, in this embodiment, the urea water tank 174 is arrange|positioned at the lower surface side of the tuyere trough 37 among the lower parts of the thresher frame 36. As shown in FIG. That is, by installing the urea water tank 174 at a position between the tuyere fan 58 and the No. 1 conveyor 61, the urea water tank is located below the urea water supply device 175 and offset in the left and right direction. (174) can be placed.

As shown in FIGS. 17 and 18 , the urea water supply pipe 179 and the urea water return pipe 180 connected to the urea water tank 174 follow the right side of the threshing apparatus 5 up and down, and the thresher The lower side of the frame 36 may be left and right, so that it can be piped in a short length. In addition, the urea water tank 174 can be arranged in the vicinity of the tuyere fan 58 for guiding the heat from the engine 14, so that freezing or recrystallization of the urea water can be prevented by using the heat from the engine 14. can do.

Next, with reference to FIG. 18, the modified example of the installation position of the urea water tank 174 arrange|positioned under the thresher frame 36 is demonstrated. As shown by the imaginary line in FIG. 18 , the urea water tank 174 may be provided on the lower surface side of the No. 1 gutter 38 or the No. 2 gutter 39 . 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 behind the second conveyor 62 . it doesn't matter Thereby, the urea water tank 174 can be installed compactly by utilizing the space under the thresher frame 36. As shown in FIG.

<Fourth embodiment>

Next, a fourth embodiment embodying the present invention will be described with reference to FIGS. 19 to 21 . In addition, the combine in this embodiment arranges the urea water tank 174 in the lateral space of the threshing apparatus 5 unlike 3rd Embodiment. About the other structure, since it is the same structure as the combine in 3rd Embodiment, the detailed description is abbreviate|omitted and the structure concerning the urea water tank 174 is demonstrated below.

19 and 20, the urea water tank 174 which stores urea water inside the side cover 41 which covers the left side of the threshing apparatus 5 is arrange|positioned. The urea water supply apparatus (the grain tank 7 side) arrange|positioned on the right side (grain tank 7 side) of the threshing apparatus 5 while being able to install the urea water tank 174 compactly by utilizing the space inside the side cover 41 The piping path (the urea water supply pipe 179 and the urea water return pipe 180) connecting 175) may be configured in a short length.

19 and 20, the urea water tank 174 is arrange|positioned at the left side of the fuel tank 31 among the side cover 41 inner side. The urea water tank 174 is comprised in the L-shape which 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 protruded toward the outboard side (left side) from the upper left side surface of the fuel tank 31 may be enclosed.

The urea water tank 174 is provided in the front-back direction from the left side of the fuel tank 31, and has the shape which protruded the rear part upward. And the urea water tank 174 has the water supply port 174a protruding toward the outboard side (left side) in the upward protrusion part in the back. By configuring the urea water tank 174 in this way, 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 unit) 32 and the water supply port Since the (urea water supply part) 174a can be arrange|positioned close to it, replenishment workability|operativity can be improved.

In the present embodiment, as in the modified example shown in FIG. 21 , the urea water tank 174 may be configured integrally with the side cover. In the modified example shown in FIG. 21, the urea water tank 174 is a tank part for storing urea water on the back side (fuel tank 31 side) of the side cover part 174b which covers the entire left side surface of the fuel tank 31 ( 174c) is provided, and on the front side of the side cover part 174b, a water supply port 174a communicated with the tank part 174c is provided. In addition, an opening 174d is provided in the non-installation area of the tank 174c of the side cover 174b, and the fuel supply port 32 of the fuel tank 31 is inserted through the opening 174d.

At this time, by making the connection part of the tank part 174c, the urea water supply pipe 179, and the urea water return pipe 180 detachable with a quick coupler, etc., the urea water tank 174 of the side cover integral type can be separated. can do. In this way, by separating the urea water tank 174, operations such as maintenance and cleaning around the fuel tank 31 are facilitated, and by separating and storing the urea water tank 174, the urea water is optimally stored. It can be managed under a temperature environment.

<Fifth embodiment>

Next, a fifth embodiment embodying the present invention will be described with reference to FIGS. 22 to 29 . In addition, unlike 3rd Embodiment, the combine in this embodiment overlaps the urea water tank 174 behind the grain tank 7 on the fuel tank 31, and is arrange|positioned. Since it is the same structure as the combine in 3rd Embodiment about another structure, the detailed description is abbreviate|omitted and the structure concerning the urea water tank 174 is demonstrated below.

22 and 23 , the urea water tank 174 is disposed on the lower side of the threshing apparatus 5 by overlapping the fuel tank 31, and the water supply port 174a of the urea water tank 174 and the fuel tank The oil supply port 32 of (31) is protruded toward the outer side of the threshing apparatus 5. As a result, the fuel tank 31 and the supply ports of the urea water tank 174 (the oil supply port 32 and the water supply port 174a) can be arranged at positions close to each other, which is necessary for oil supply and water supply work. burden can be alleviated.

22 and 23, the thresher frame 36 (No. 2 gutter 39) which comprises the frame of the threshing apparatus 5 in the back of the threshing apparatus 5, and the rocking|fluctuation sorting board 57 ), a urea water tank 174 for storing urea water in the lower rear portion is disposed overlapping the fuel tank 31 . Moreover, the urea water tank 174 and the fuel tank 31 are superimposed up and down and arrange|positioned inside the side cover 41 which covers the left side of the threshing apparatus 5, The oil supply port 32 rather than the opening part of the side cover 41. ) and the water supply port 174a is protruding to the outside of the aircraft. Thereby, while being able to install the urea water tank 174 compactly utilizing the space behind the threshing apparatus 5, the number of urea arrange|positioned on the right side surface (grain tank 7 side) of the threshing apparatus 5. The piping path (the urea water supply pipe 179 and the urea water return pipe 180) connecting the supply device 175 may be configured in a short length.

22 and 23 , the upper portion of the fuel tank 31 is tapered (a shape in which the front and rear widths are narrowed upward), and the urea water tank 174 is configured in a substantially inverted U-shape. do. By making the urea water tank 174 into a shape matching the upper surface of the fuel tank 31 , the upper surface of the fuel tank 31 is covered with the lower surface of the urea water tank 174 , and the urea water tank 174 is placed on the fuel tank 31 . install on In addition, the urea water tank 174 is mounted on the fuel tank 31 so that the fuel tank 31 is clamped 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, it may be configured to be detachable by sliding the urea water tank 174 in the left and right directions with respect to the fuel tank 31 , and detaching the urea water tank 174 from the fuel tank 31 in the vertical direction is also good 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 has a structure detachable by a quick coupler or the like. In this way, by configuring the urea water tank 174 to be detachable from the fuel tank 31 , water can be supplied simply by replacing the urea water tank 174 , and the urea water tank 174 can be installed after the work is completed. Since it can be stored separately, it is possible to prevent deterioration of the quality of the urea water.

Next, with reference to FIGS. 24-26, the 1st modification in this embodiment is demonstrated below. In this modified example, as shown in FIGS. 24-26, the urea water tank 174 is arrange|positioned below the fuel tank 31, and it arrange|positions so that the urea water tank 174 may be surrounded by the fuel tank. When the fuel tank 31 surrounds the urea water tank 174 , the fuel tank 31 functions as a heat insulating layer, so that the thermal insulation effect in the urea water tank 174 can be improved, and the urea water tank 174 ), it is possible to suppress the deterioration of the number of urea stored in the

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

Moreover, as shown in FIG. 25, the fuel tank 31 is being fixed with the tank support body (support belt) 33 with respect to the traveling body 1 . At this time, the fuel tank 31 is fixed by the tank support 33 at a position overlapping the storage position of the urea water tank 174 (the position where the notch 31a is formed), so that the urea water tank 174 is also the tank support ( 33) may be supported and fixed to the traveling body 1 . In addition, since the tank support body 33 is provided so that the tank support body 33 is hung over the left end of the urea water tank 174, the urea water tank 174 is attached to the fuel tank without removing the tank support body 33. It can be isolated from (31).

Next, with reference to FIGS. 27-29, the 2nd modification in this embodiment is demonstrated below. In this modified example, as shown in FIGS. 27 to 29, the urea water tank 174 is disposed below the fuel tank 31 and the urea water tank 174 is disposed so as to be surrounded by the fuel tank, Let the urea water tank 174 have a shape having a convex portion 174x protruding upward from the water supply port 174a. By providing the convex portion 174x connected to the upper side of the water supply port 174a, a space in which the urea water is not filled in a portion of the convex portion 174x can be secured. Accordingly, even when the urea water in the urea water tank 174 is frozen, the volume of the urea water in the urea water tank 174 is prevented from exceeding the volume of the urea water tank 174 , and the damage can be prevented.

In the second modification, as shown in FIGS. 27 to 29 , the left end of the urea water tank 174 has a shape in which it protrudes outwardly (left side) from the left end of the fuel tank 31 . That is, when the urea water tank 174 is fitted to the notch 31a of the fuel tank 31 , the left side of the urea water tank 174 is located on the left side of the fuel tank 31 . In the left end of the urea water tank 174, a convex portion 174x protruding upward from the water supply port 174a is provided at a position offset from the oil supply port 32 of the fuel tank 31. , A breather 174y is installed on the upper surface of the convex portion 174x, and is configured to allow external introduction.

As shown in FIGS. 28 and 29 , even if urea water is supplied to the urea water tank 174 by setting the breather 174y at a position higher than the water supply port 174a, the convex portion 174x is not It is not filled with water and 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, when the volume of the urea water tank 174 is exceeded. Since there is no urea water tank 174, damage or the like can be prevented.

<Sixth embodiment>

Next, a sixth embodiment embodying the present invention will be described with reference to FIGS. 30 to 34 . In addition, the combine in this embodiment differs from each previous embodiment, between the grain tank 7 front surface and the engine room 97 rear surface. WHEREIN: The urea water tank 174 below the exhaust gas purification apparatus 74. is placing About the other structures, since they are the same structure as the combine in each embodiment previously, the detailed description is abbreviate|omitted, and the structure regarding the urea water tank 174 is demonstrated below.

As shown in FIGS. 30-34, the urea water tank 174 is arrange|positioned between the front surface of the grain tank 7 and the rear surface of the engine room 97, and below the exhaust gas purification apparatus 74. The urea water tank 174 arranges the water supply port 174a provided above the tank toward the outboard side (right side), and the urea water tank 174 from the outboard side between the grain tank 7 and the engine room 97. ) so that the urea solution can be replenished. 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 right side surface of the threshing apparatus 5, and the grain tank 7 front surface. Thereby, the urea water tank 174 is disposed at a position where the air heated through the engine room 97 is guided, so that the urea water tank 174 can be maintained at an appropriate temperature and the stored urea water is frozen. can prevent Moreover, while arranging the fuel tank 31 and the urea water tank 174 on the left and right of the traveling body 1, 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, it is possible to prevent misjudgment between the oil supply port 32 and the water supply port 174a when performing the oil supply operation to the fuel tank 31 or the water supply operation to the urea water tank 174 . .

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

Therefore, after stopping the injection of the urea water, the urea water remaining in the urea water injection pipe 177 or the like due to the elevation 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 can also be refluxed. Similarly, after stopping the injection of urea water, the urea water supply device 175 , the urea water supply pipe 179 , and the urea water return pipe 180 due to the elevation difference between the urea water tank 174 and the urea water supply device 175 . ) and the remaining urea water may be refluxed to the urea water tank 174 . In addition, since the urea water tank 174 and the urea water supply device 175 are arranged offset 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 has a concave portion 7a for installing a purification device by a shape that cut out the front left side, and a concave portion 7b for installing a grain discharge conveyor by a groove shape in the front-rear direction on the upper left side. ) and a concave portion 7c for installing a grain conveyor having a shape in which a step is formed along the vertical direction in the center of the left side surface. A space is formed in the engine room 97 rear in the recessed part 7a for purification apparatus installation of the grain tank 7 front surface, and the exhaust gas purification apparatus 74 and the urea water tank 174 are arrange|positioned. The grain discharge conveyor 8 which accommodated the front-end|tip in the conveyor support body in the recessed part 7b for grain discharge conveyor installation of the upper surface of the grain tank 7 is accommodated along the recessed part 7b for grain discharge conveyor installation. In addition, the grain conveyor 63 is fixed along the grain conveyor installation concave portion 7c in the grain conveyor installation concave portion 7c on the left side of the grain tank 7, and is installed on the grain conveyor installation concave portion 7c upper portion. connected by one receptacle.

The grain tank 7 supports the grain tank 7 rear part on the longitudinal take-out conveyor 8a, and is comprised so that a lateral movement is possible toward the machine outer side around the longitudinal take-out conveyor 8a axial center line. The right side surface of the threshing apparatus 5 and the engine room 97 rear surface can be opened by rotating the grain tank 7 centering on the vertical rotation axis of the bell take-out conveyor 8a to vertical circumference outboard side. Therefore, when an operator opens by the lateral movement of the grain tank 7, SCR by the exhaust gas purification apparatus 74 of the engine room 97 rear, the urea water tank 174, and the urea water supply apparatus 175. While the system can be approached easily, when the grain tank 7 is accommodated, it will be in the state inaccessible to the said SCR system. Therefore, since the operator cannot come into contact with the exhaust gas purification device 74, the urea water tank 174, and the urea water supply device 175, which become high temperature during operation, safety can be ensured and the urea Access to the SCR system is made simple in various operations such as water supply and maintenance.

Fig. 35 is an explanatory view of the first modification of the structure in which the exhaust gas purification device 74 (the first case 75 or the second case 229) is attached. In the said embodiment shown in FIG. 4 etc., although the 1st case 75 of the exhaust gas purification apparatus 74 was arrange|positioned at the threshing apparatus 5 side, in the 1st modified example shown in FIG. 35, the 1st case (parallel) connected 75) and the 2nd case 229 were supported by the case fixing body 231 so that it might adjoin from right and left, and the 2nd case was arrange|positioned at the threshing apparatus 5 side. Thereby, while supporting the 1st case 75 of a long cylindrical shape, the 2nd case 229, and the urea mixing pipe 239 toward the front-back direction, it is the right side of the threshing apparatus 5, and it is a 2nd case (229) A tail pipe (83) is disposed at the rear, and is connected to the SCR outlet pipe (237).

As shown in FIG. 35 , in the first modified example, the longitudinal direction of each of the first case 75 and the second case 229 of the exhaust gas purification device 74 is the front-rear direction, and the first case 75 is And the 2nd case 229 is arranged side by side from side to side, and the 2nd case 229 is arrange|positioned at the threshing apparatus 5 side. That is, in a 1st modification, while arrange|positioning the 2nd case 229 on the threshing apparatus 5 side, the 1st case 75 is inside the recessed part 7a for purification|cleaning apparatus installation of the grain tank 7 (inside on the right side) ), it can arrange|position so that the 1st case 75 may be surrounded by the grain tank 7 and the 2nd case 229. Accordingly, the first case 75 can be disposed in a high-temperature environment by the high-temperature arrangement from the engine compartment 97, so that the regeneration process in the first case 75 can be maintained at high performance. Moreover, the route from the SCR outlet pipe (exhaust outlet) 237 of the 2nd case 229 to the tail pipe 83 arrange|positioned on the right side of the threshing apparatus 5 can be shortened, and with respect to the tail pipe 83 The SCR outlet pipe 237 can be easily connected.

Fig. 36 is an explanatory view of a second modification of the structure in which the exhaust gas purification device 74 (the first case 75 or the second case 229) is attached. In the embodiment shown in Fig. 4 and the like, the first case 75 and the second case 229, which are elongated in the front and rear, are arranged side by side from side to side. In the second modification shown in Fig. 36, the first case connected in parallel shape. (75) and the second case (229) are supported by a case fixing body (231) so as to be adjacent to each other, and between the first case (75) and the second case (229) of the elongated cylindrical shape from side to side, the urea mixing pipe (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 on the engine 14 side. And while arranging the 2nd case 229 so that the SCR outlet pipe (exhaust outlet) 237 may become the left side, it is the right side of the threshing apparatus 5, and the tail pipe 83 is installed behind the 2nd case 229. and connect the tail pipe 83 to the SCR outlet pipe 237 .

As shown in Fig. 36, in the second modified example, the first case 75 and the first case 75 and the second case 229 of the exhaust gas purification device 74 in the longitudinal direction of each of the longitudinal directions are left and right directions. The second case 229 is arranged side by side in the front and rear, and the first case 75 is arranged on the engine compartment 97 side. That is, in a 2nd modified example, the 1st case 75 is arrange|positioned on the engine 14 side, while the 2nd case 229 is arrange|positioned at the grain tank 7 side.

In the 2nd modification by the said structure, while the 1st case 75 and the 2nd case 229 and the urea mixing pipe 239 can be installed compactly along the grain tank 7 front surface, the 2nd The tail pipe 83 on the right side of the threshing apparatus 5 can be connected to the SCR outlet pipe (exhaust outlet) 237 of the case 229 easily. Accordingly, the first case 75 can be disposed in a high-temperature environment by the high-temperature arrangement from the engine compartment 97, so that the regeneration process in the first case 75 can be maintained at high performance. In addition, by forming the exhaust path between the engine 14 and the tail pipe 83 to be short, the temperature of the exhaust gas in the exhaust path can be maintained at a high temperature required for 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 . It is set as the structure in which the SCR inlet pipe 236 is provided in the right end side of the 2nd case 229, while providing the SCR outlet pipe 237 in the left end side of the 2nd case 229 while providing. Then, between the first case 75 and the second case 229 of the long cylindrical shape from side to side, in the upper side of each case 75 and 229, the urea mixing tube 239 of the long cylindrical shape from side to side. are installed parallel to each other. Further, 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, 2 As a configuration in which the SCR inlet pipe 236 is provided on the left end side of the case 229 and the SCR outlet pipe 237 is provided on the right end side of the second case 229, the engine 14 is connected to the first case ( 75), the connection to the purification inlet pipe 81 may be configured to be short.

In addition to the configuration of the above embodiment, in order to reduce the influence on peripheral parts by heat radiation from the exhaust gas purification device 74 serving as a heat source, even if a heat shield member is disposed on the outer periphery 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, the exhaust gas purification apparatus ( 74), and while reducing the thermal influence to the threshing apparatus 5 side, the temperature fall around the exhaust gas purification apparatus 74 is suppressed. Moreover, as shown in FIG. 38, the purification apparatus cover body 261 suppresses retention of the heated air around the exhaust gas purification apparatus 74 periphery by making the many holes open in the side part, and a grain tank It is possible to prevent (7) from being excessively heated by the exhaust gas purifying device (74).

37 and 38, the lock pin fixing frame 160 is connected from the upper right of the machine housing frame of the threshing apparatus 5, and the grain tank 7 is fixedly supported on the lock pin fixing frame 160 upper end. A lock pin 161 is attached. The lock arm 162 is provided in the grain tank 7 front surface, and when the grain tank 7 is accommodated in the accommodation position of the traveling body 1, the lock arm 162 meshes with the lock pin 161. As shown in FIG. Further, a lock release lever (not shown) is provided on the front surface of the grain tank 7, the lock release lever is connected to the lock arm 162 through the link rod 163, and the lock pin 161 is operated by the lock release lever operation. The lock arm 162 is configured to be detachable from the . The rear portion of the grain tank 7 is supported on the paper take-out conveyor 8 a, and the grain tank 7 is moved around the axis line of the paper take-out conveyor 8 a by the lock arm 162 detachment operation of the lock release lever toward the outside of the machine. It is made to move horizontally, and the right side of the threshing apparatus 5 and the rear surface of the engine room 97 are comprised so that opening is possible.

As shown in FIGS. 37 and 38, while the purifier cover body 261 is supported by the lock pin fixing frame 160, the left side surface of the grain tank 7 is covered with the heat insulating material 260, thereby purifying exhaust gas. It does not matter even as a structure which heat-shields the periphery of the apparatus 74. That is, by covering a part of the right side and the upper surface of the exhaust gas purification device 74 with the heat insulating material 260 , while the remaining parts of the left side and the upper surface of the exhaust gas purification device 74 are covered with the purification device cover body 261 , , heat from the exhaust gas purification device 74 can be shielded. Therefore, while suppressing the thermal influence of the exhaust gas purification device 74 on peripheral parts and preventing the operator from contacting the high temperature exhaust gas purification device 74, the exhaust gas purification device ( The ambient atmosphere of 74 can be maintained at a high temperature by the exhaust from the engine 14 . And in order to attach the heat insulating material 260 to the recessed part 7a for purification apparatus installation of the grain tank 7, the thermal influence by the exhaust gas purification apparatus 74 inside the grain tank 7 can be reduced. .

Moreover, as shown in FIG. 39, 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, in addition to providing the heat insulating material 260, the support 250 of It is good also as connecting the heat shield plate 262 toward the upper side of the exhaust gas purification apparatus 74 from the right edge and providing it. 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, by blocking the radiant heat from the exhaust gas purification device 74 with 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: thresher 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 holding body (rear side frame)
94: Horizontal frame (rear side frame) 97: Engine room
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 (5)

a prime mover having an engine;
A threshing apparatus for performing a threshing process;
A grain tank which is the lateral side of the said threshing apparatus, and which is located in the rear side of the said driving part, and stores the grain after threshing,
An exhaust gas treatment device for treating the exhaust gas of the engine is provided,
The exhaust gas treatment device includes a first case for removing particulate matter contained in the exhaust gas of the engine, and a second case for removing nitrogen oxides contained in the exhaust gas after treatment in the first case,
The combine in which the said 2nd case is arrange|positioned in the state which overlaps with the said grain tank in a planar view and a front view. The method of claim 1,
The combine which forms a recessed part in the surface which opposes the said grain tank and an engine room in the front left side of the said grain tank, and is arrange|positioned in the state which entered the said 2nd case into the said recessed part. 3. The method according to claim 1 or 2,
The combine in which the said 2nd case overlaps with the said grain tank when viewed from a side. 4. The method of claim 3,
The said 2nd case was installed along the front surface of the said grain tank, The combine characterized by the above-mentioned. 5. The method of claim 4,
The said grain tank is comprised so that the longitudinal take-out conveyor supported by the rear part of the said grain tank is transversely movable toward the machine outer side by an axial center, When the said 2nd case opens the said grain tank by lateral movement, an accessible combine .

Images