KR20230136679A - Combine - Google Patents

Abstract

The combine has an engine as a power source mounted on the running body, an exhaust gas purification case that removes nitrogen oxide substances in the engine's exhaust gas, a urea tank that holds the urea water supplied to the exhaust gas purification case, and a grain container that holds the harvested grains. Equipped with a tank. The grain tank has a recess in which the urea tank is placed.

Description

Combine {COMBINE}

The present invention relates to a combine, such as a combine that collects grains by harvesting grain stalks planted in a field, or a feed combine that harvests grain stalks for feed and collects them as feed, and more specifically, a diesel engine, etc. It relates to a combine equipped with an exhaust gas purification device that removes particulate matter (i.e., particulate) contained in the exhaust gas or nitrogen oxides (NOx) contained in the exhaust gas.

Conventionally, as an exhaust gas purification device (exhaust gas post-processing device) in the exhaust path of a diesel engine, there is a case in which a diesel particulator filter is installed (hereinafter referred to as DPF case) and a case in which a selective reduction catalyst is installed (hereinafter referred to as DPF case). , 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 (for example, see Patent Documents 1 to 3).

Japanese Patent Publication No. 2009-74420 Japanese Patent Publication No. 2012-21505 Japanese Patent Publication No. 2012-177233

When removing nitrogen oxides in exhaust gas using the selective catalytic reduction (SCR) method, supply of a reducing agent (for example, urea) is required. Therefore, when mounting the SCR denitrification device on a combine, not only the SCR case but also installation space for a reducing agent tank containing the reducing agent is required.

Therefore, the present invention is intended to provide a combine in which improvements were made by examining these phenomena.

In order to achieve the above object, the combine of the present invention includes an engine as a power source mounted on a traveling body, an exhaust gas purification device for removing nitrogen oxide substances in the exhaust gas of the engine, and a reducing agent supplied to the exhaust gas purification device. In a combine provided with a reducing agent tank for receiving and a grain tank for loading harvested grain, the grain tank is provided with a recess for the reducing agent tank in which the reducing agent tank is mounted in the middle portion of the side.

In the combine of the present invention, the grain tank may be configured to be rotatable outside the traveling body, and the recess for the reducing agent tank may be formed near the rotation point of the grain tank.

Furthermore, in the combine of the present invention, for example, the traveling direction of the traveling body is forward and backward, the rotation point of the grain tank is provided at the rear of the grain tank, and the front of the grain tank is opened to the outside of the machine. The grain tank may be rotatable, and the recess for the reducing agent tank may be installed on a side of the grain tank closest to the rotation point.

Furthermore, in the combine of the invention of the present application, the engine is disposed on the front side of the grain tank, and a purification device is installed upright from the traveling body below the recess for installation of a purification device notched on the front of the inside side of the grain tank. A support frame is installed, and the exhaust gas purification device is installed on the purification device support frame, while the recess for the reducing agent tank is formed by notching the rear side of the grain tank, and is outside the traveling body than the pivot point. The reducing agent tank may be installed at the position, and the reducing agent pipe connecting the reducing agent tank and the exhaust gas purification device may be arranged along the grain tank.

Furthermore, in the combine of the present invention, the reducing agent pipe is led from the reducing agent tank to the center of the traveling body rather than the pivot point, passes below the grain tank and is led to the front of the traveling body, and is provided with a frame for supporting the purifying device. Accordingly, it may be guided to the exhaust gas purification device.

In addition, in the combine of the present invention, a reducing agent water supply device for supplying the reducing agent to the exhaust gas purification device is installed in the reducing agent piping, and the reducing agent water supply device is a supply device installed on the frame for supporting the purifying device. It may be fixed to a support.

However, when removing nitrogen oxides in exhaust gas using the selective catalytic reduction (SCR) method, supply of a reducing agent (for example, urea) is required. Therefore, when mounting an SCR denitrification device on a combine, it is necessary to mount not only the SCR case but also a reducing agent tank containing the reducing agent, and manage the remaining amount of reducing agent in the reducing agent tank.

Therefore, in the combine of the present invention, a fuel tank accommodating the fuel of the engine, a fuel remaining amount display according to the remaining fuel amount in the fuel tank, and a reducing agent remaining amount display according to the reducing agent remaining amount in the reducing agent tank are displayed adjacent to the display screen. It may be possible to provide a display unit.

In the combine of the present invention, since the grain tank is provided with a recess for the reducing agent tank in which the reducing agent tank is placed, the space for placing the reducing agent tank can be secured without increasing the external dimensions of the combine.

In addition, the grain tank is configured to be rotatably installed on the outside of the traveling body using the support member as a pivot point, and the recess for the reducing agent tank is installed on the side of the grain tank closest to the pivoting point, so that the reducing agent tank Regarding the reducing agent piping connected to , deflection during rotation of the grain tank can be reduced.

In addition, the recess for the reducing agent tank is formed at a position outside the traveling body from the pivot point, and the reducing agent pipe connected to the reducing agent tank is led from the reducing agent tank toward the center of the traveling body rather than the pivoting point, so that the reducing agent pipe is connected to the grain tank. This can prevent disruption to the meeting.

Additionally, if the reducing agent piping passes below the grain tank and is led to the exhaust gas purification device, the reducing agent piping can be prevented from interfering with the rotation of the grain tank.

In addition, if the engine is disposed on the front side of the grain tank with the traveling direction of the traveling body being forward and backward, and the recess for the reducing agent tank is installed on the rear side of the grain tank, the reducing agent tank is protected from the influence of heat from the engine. You can avoid receiving it.

Additionally, in the combine of the present invention, if a display unit is provided that displays the remaining fuel amount display and the remaining amount display of the reducing agent adjacent to the display screen, the display portion of the remaining amount of fuel and reducing agent that decreases with use of the combine can be displayed adjacent to each other. You can. This allows the operator to check the remaining amounts of both fuel and reducing agent without almost moving his or her gaze. Therefore, the operator's visibility is improved compared to the case where these remaining amount indications are displayed at a distant location.

1 is a left side view of a 6-row harvesting combine showing an embodiment of the present invention.
Figure 2 is a plan view of the same.
Figure 3 is a right side view of the east.
Figure 4 is a perspective view showing the positional relationship between engine peripheral parts, a grain tank, and a thresher.
Figure 5 is a front view showing the configuration around the exhaust gas purification device.
Figure 6 is a rear perspective view of the exhaust gas purification device attachment portion.
Figure 7 is an enlarged explanatory diagram of Figure 6.
Figure 8 is a rear view of the same.
Figure 9 is a perspective view showing the arrangement of the engine and the exhaust gas purification device.
Figure 10 is a perspective view showing the support structure of the exhaust gas purification device.
Figure 11 is a rear perspective view showing the support structure of the exhaust gas purification device.
Figure 12 is a perspective view showing the configuration around the exhaust gas purification device and the urea water supply device.
Figure 13 is a perspective view showing the configuration around the exhaust gas purification device attachment portion.
Figure 14 is a perspective view showing the arrangement of pipes.
Figure 15 is a rear perspective view showing the arrangement of the grain tank and vertical take-out conveyor.
Figure 16 is a plan view showing the rear cover in an open state.
Figure 17 is a rear view showing the arrangement of the urea solution tank.
Figure 18 is a right side view showing the arrangement of the urea solution tank.
Figure 19 is a plan view showing the rotation of the grain tank.
Figure 20 is an enlarged plan view showing the rotation of the grain tank.
Figure 21 is a plan view showing a recessed portion of a grain tank in partial cross section.
Figure 22 is a schematic diagram for explaining the supply of urea water.
Figure 23 is a rear view showing the supply stand and urea solution tank.
Figure 24 is a right side view showing the supply station and urea solution tank.
Fig. 25 is a cross-sectional explanatory view of the top perspective of the driving cabin.
Figure 26 is an explanatory diagram of an example of a display screen showing information during harvesting work.
Fig. 27 is an explanatory diagram of an example of a display screen.
Figure 28 is an explanatory diagram of another example of a display screen showing information during harvesting work.
29 is an explanatory diagram of another example of a display screen showing information when not working.
Figure 30 is a flow chart showing the control operation of the water full warning of the urea water tank.
Figure 31 is a flowchart showing the control operation of the remaining amount warning of the urea solution tank.

<First embodiment>

Below, a first embodiment embodying the present invention will be described based on FIGS. 1 to 20. With reference to FIGS. 1-4, the overall structure of the combine of embodiment in which the diesel engine was mounted is demonstrated. In addition, in the following description, the left side toward the forward direction of the traveling body 1 is only referred to as the left side, and similarly, the right side toward the forward direction is only referred to as the right side.

1 to 4, it is provided with a traveling body 1 supported by a pair of left and right traveling crawlers 2 as traveling parts. At the front of the traveling body 1, a 6-barrel reaping device 3 for harvesting grain while harvesting the grain stem is raised and lowered around the reaping pivot axis 4a by a single-acting lifting hydraulic cylinder 4. Possibly installed. In the traveling body 1, a threshing device 5 having a feed chain 6 and a grain tank (grain tank) 7 for storing grains taken out from the threshing device 5 are arranged horizontally. It is mounted as 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 on the right side of the traveling body 1.

In addition, a grain discharge conveyor 8 that can pivot through a vertical take-out conveyor 8a is installed at the rear of the traveling body 1, and the grains inside the grain tank 7 are disposed at the rice discharge port of the grain discharge conveyor 8. (9) It is configured to be discharged into the truck bed or container. An operating cabin 10 is installed on the right side of the reaping device 3 and on the front side of the grain tank 7. A cabin pivot axis 10a is installed at the front lower part of the driving cabin 10, and the front lower part of the driving cabin 10 is rotatably supported on the traveling body 1 through the cabin pivot axis 10a. , the operation cabin 10 is installed to be movable toward the front side of the aircraft, and the operation cabin 10 is configured to rotate toward the front side around the cabin rotation point axis 10a.

Inside the driving cabin 10, there is a control handle 11, a driver's seat 12, a main gear lever 15, a sub-shift lever 16, and a threshing clutch lever 17 for turning the threshing clutch on and off. A harvesting clutch lever 18 is disposed to turn the harvesting clutch on and off. A diesel engine 14 as a power source is disposed on the traveling body 1 below the driver's seat 12. Additionally, the operating cabin 10 is provided with steps for the operator to board, a handle column equipped with the control handle 11, and a lever column equipped with the respective levers 15, 16, 17, and 18, etc.

As shown in FIG. 1, left and right track frames 21 are disposed on the lower surface side of the traveling body 1. The track frame 21 includes a driving 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 driving crawler 2. A plurality of track rollers 24 are provided to maintain the grounded side of the traveling crawler 2 in a grounded state, and an intermediate roller 25 is provided to maintain the non-grounded side of the traveling crawler 2. The front side of the traveling crawler (2) is supported by the drive sprocket (22), the rear side of the traveling crawler (2) is supported by the tension roller (23), and the ground side of the traveling crawler (2) is supported by the track roller (24). and supports the non-grounded side of the traveling crawler (2) by the intermediate roller (25).

As shown in FIGS. 1 and 2 , the fuel tank 31 containing the fuel supplied to the engine 14 is disposed in the left rear part of the traveling body 1, and is disposed on the outer side of the machine on the left side of the threshing device 5. The fuel tank 31 is configured to be able to replenish diesel fuel. That is, the fuel tank 31 is on the traveling body 1, is installed in a position below the threshing cutter 65 in the rear part of the threshing device 5, and the oil supply port 32 is connected to the threshing device 5. ) An extension is installed on the left side to enable oil supply from the outside of the aircraft.

1 and 2, the reaping frame 51 connected to the reaping rotation axis 4a of the reaping device 3 is equipped with a Varican-type reaping blade device ( 52) is installed. In front of the harvesting frame 51, a 6-trillion grain stem raising device 53 is disposed for raising the unharvested grain stems planted in the field. A grain stem transport device 54 that transports the reaped grain stems harvested by the reaping blade device 52 is disposed between the grain stem raising device 53 and the front end (transfer start side) of the feed chain 6. In addition, in front of the lower part of the grain stem raising device 53, a 6-trillion shearing body 55 for splitting unharvested grain stalks protrudes. It is configured to continuously harvest the unharvested grain stems planted in the field by the harvesting device 3 while moving within the field.

Next, the structure of the threshing device 5 is explained with reference to FIGS. 1 and 2 . As shown in FIGS. 1 and 2, the threshing device 5 includes a barrel 56 for grain threshing, a oscillating sorting plate 57 for sorting out the grains falling below the barrel 56, and a winnowing fan 58. ), a processing cylinder 59 for reprocessing the threshing waste taken out from the rear of the barrel 56, and an exhaust fan 60 for discharging dust from the rear of the shaking sorting unit 57. Moreover, the grain stem conveyed from the reaping device 3 by the grain stem conveyance device 54 is inherited to the feed chain 6, is carried into the threshing device 5, and is threshed in the barrel 56.

As shown in FIG. 1, on the lower side of the oscillating sorting panel 57, there is a No. 1 conveyor 61 for taking out the grains (No. 1) sorted by the oscillating sorting panel 57, and for taking out No. 2 items such as grains with a diameter. A second conveyor (62) is installed. The oscillation sorting board 57 is configured so that the threshed grains that have leaked from the water net 67 installed under the barrel 56 are oscillated and sorted (specific gravity sorted) by the feed pan 68 and the chaff sieve 69. As for the grains that have fallen from the oscillation sorting board 57, the dust in the grains is removed by the sorting wind from the winnowing fan 58, and the grains fall on the No. 1 conveyor 61. The grains withdrawn from conveyor 1 (61) are brought into the grain tank (7) through the grain lifting conveyor (63) and collected in the grain tank (7).

In addition, as shown in FIG. 1, the oscillating sorting board 57 is configured to drop No. 2 objects, such as grains with abrasive grains, from the chaff sieve 69 onto the No. 2 conveyor 62 by oscillating sorting. It is provided with a selection fan (71) that selects the second material falling below the chaff sieve (69) using wind. The No. 2 material that falls from the chaff sieve (69) has dust and straw debris in the grains removed by the selection wind from the selection fan (71) and falls on the No. 2 conveyor (62). The terminal part of the No. 2 conveyor 62 is connected in communication with the upper surface side of the feed pan 68 through the reduction conveyor 66, and is configured to return the No. 2 product to the upper surface side of the swing sorting panel 67 for re-selection.

Meanwhile, as shown in FIGS. 1 and 2, a straw discharge chain 64 and a straw discharge cutter 65 are disposed at the rear end side (transfer end side) of the feed chain 6. The discharge straw (straw with degranulated grains) inherited from the rear end of the feed chain 6 to the straw discharge chain 64 is discharged in a long state to the rear of the traveling body 1, or to the rear of the threshing device 5. It is configured to be cut short to an appropriate length by the discharge straw cutter 65 installed in the unit and then discharged to the rear and lower side of the traveling body (1).

Next, referring to FIGS. 4 to 13, the first case 75 (diesel particulator filter, DPF) and the second case 229 (selective catalytic reduction, SCR) as the exhaust gas purification device 74 and the diesel engine (14) is explained. The first case 75 removes particulate matter in the exhaust gas of the diesel engine 14. The second case 229 (exhaust gas purification case) constitutes an SCR system that removes nitrogen oxide substances in the exhaust gas of the diesel engine 14.

4 to 9, the exhaust gas purification device 74 is provided with a continuously regenerative first case 75 into which exhaust gas of the diesel engine 14 is introduced. The first case 75 as the exhaust gas purification case is formed in a long cylindrical shape extending in the front-back direction and has an inlet case 76 and an outlet case 77. Inside the inlet case 76 and the outlet case 77, there is a diesel oxidation catalyst 79 such as platinum that generates nitrogen dioxide (NO ₂ ), and the collected particulate matter (PM) is continuously oxidized at a relatively low temperature. Soot filters 80 having a honeycomb structure for removing soot are arranged in series in the direction of movement of the exhaust gas (from the front to the back).

4 to 9, the purification inlet pipe 81 as an exhaust gas inlet pipe is welded and fixed to the inlet case 76, and the purification inlet pipe 81 as an exhaust gas outlet pipe is attached to the outlet case 77. Bolt one end of the outlet pipe (82). One end of a urea mixing pipe 239 (exhaust pipe), which will be described later, is flange-fastened to the other end of the purification outlet pipe 82, and the urea mixing pipe 239 is connected to the purification outlet pipe 82. The exhaust gas of the diesel engine 14 is introduced into the first case 75 from the purification inlet pipe 81, and the exhaust gas in the first case 75 flows from the purification outlet pipe 82 to the urea mixing pipe 239. It is configured to be discharged. Additionally, the inlet case 76 and the outlet case 77 are detachably fastened to a plurality of thick plate-shaped intermediate flange bodies 84 and a plurality of bolts.

With the above configuration, nitrogen dioxide (NO ₂ ) generated by the oxidation action of the diesel oxidation catalyst 79 is supplied into the soot filter 80 from one end surface (introduction end surface). Particulate matter (PM) contained in the exhaust gas of the diesel engine 14 is collected in the soot filter 80 and continuously oxidized and removed by nitrogen dioxide (NO ₂ ). In addition to the removal of particulate matter (PM) in the exhaust gas of the diesel engine 14, the content of carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas of the diesel engine 14 is reduced.

Next, as shown in FIGS. 4 to 9, there is an exhaust gas purification device 74 for purifying the exhaust gas discharged from each cylinder of the diesel engine 14, which oxidizes nitrogen in the exhaust gas of the diesel engine 14. A second case 229 is provided as a selective catalytic reduction (SCR) system to remove substances. 4 and 7, like the first case 75, the second case 229 is formed into a long cylindrical shape extending in the front-back direction, and the second case 229 contains an element-selective catalyst. An SCR catalyst 232 for reduction and an oxidation catalyst 233 are installed, and are configured to reduce nitrogen oxidation substances (NOx). An SCR inlet pipe 236 for introducing exhaust gas and an SCR outlet pipe 237 for discharging exhaust gas are installed at the upper and lower ends of the second case 229 (one end and the other end in the exhaust gas moving direction).

7 and 8, the SCR outlet pipe 237 is installed at the rear end of the second case 229 through the outlet pipe bracket 150, and the pipe support body 151 is attached to the outlet pipe bracket 150. In addition to fastening and fixing the urea injection unit 240 at the rear end of the urea mixing pipe 239, the urea mixing pipe ( 239) The element injection unit 240 at the rear end is detachably connected. Meanwhile, the SCR inlet pipe 236 is connected to the front end of the urea mixing pipe 239, the SCR inlet pipe 236 is connected to the purification outlet pipe 82 through the urea mixing pipe 239, and the first The exhaust gas from the case 75 is configured to be introduced into the second case 229. In addition, urea water (reducing agent) from the urea water tank 174 (reducing agent tank) described later is supplied into the urea mixing pipe 239, and urea is contained in the exhaust gas from the first case 75 to the second case 229. It is designed so that water is hydrolyzed and mixed as ammonia. Additionally, it is also possible to use other reducing agents, such as anhydrous ammonia or ammonia water, instead of urea water. The exhaust gas of the diesel engine 14 is purified in the first case 75 and the second case 229 and discharged to the outside of the engine through the tail pipe 83.

As shown in FIGS. 6 to 8, the tail pipe 83 is supported on the upper surface side of the threshing device 5. The pipe bracket 246 is bolted to the right side of the upper surface of the threshing device 5, and the pipe bracket 246 is erected and installed on the upper surface of the threshing device 5 (the threshing upper surface frame at the upper right corner of the threshing device case). , the lower end side of the rear pipe support 248 is bolted to the upper end side of the pipe bracket 246, the rear end side of the tail pipe 83 is fixed to the upper end side of the rear pipe support body 248, and the tail pipe 83 ) The exhaust gas outlet at the rear end is opened toward the rear of the aircraft. 8, 10, and 11, a pipe bracket 247 is installed on the upper surface of the lower bracket 245 welded and fixed to the rear end of the case support frame 250, which will be described later, and the pipe bracket ( The lower end of the front pipe support 249 is bolted to the front pipe support 247, the front end of the tail pipe 83 is fixed to the upper end of the front pipe support 249, and the tail pipe 83 is connected to the SCR outlet pipe 237. ) is configured to connect the front end side to discharge the exhaust gas of the second case 229 from the tail pipe 83.

With the above configuration, in the exhaust gas purification device 74, first, carbon monoxide (CO) in the exhaust gas of the diesel engine 14 is removed by the oxidation catalyst 79 and the soot filter 80 in the DPF 75. Hydrocarbons (HC) are reduced. Next, inside the urea mixing pipe 239, the exhaust gas from the diesel engine 14 is mixed with the urea water from the urea injection unit 240, and the SCR catalyst 232 and the oxidation catalyst in the second case 229 are mixed. (233) Nitrogen oxide substances (NOx) in the exhaust gas in which urea water is mixed with ammonia are reduced. And the exhaust gas purified in the 2nd case 229 is discharged from the tail pipe 83 toward the upper surface side of the rear part of the threshing apparatus 5. In addition, a gap is formed at the connection portion between the SCR outlet pipe 237 on the small diameter side and the tail pipe 83 on the large diameter side, so that external air is sucked into the tail pipe 83 through the gap and is discharged from the SCR outlet pipe 237. The exhaust gas is mixed with the outside air, and the exhaust gas whose exhaust temperature has decreased is discharged from the tail pipe 83.

As shown in FIGS. 3 to 5, the grain tank 7 has a recessed portion 7a for installing a purifier having a notched shape on the front left side, and a recessed portion for installing a grain discharge conveyor having a groove shape in the front and rear direction on the left side of the upper surface. (7b), a concave portion (7c) for installing the grain conveyor in the shape of forming a step along the vertical direction in the center of the left side, and a urea water tank in the shape of notching the corner portion on the outside of the traveling body (1) on the rear side. It is provided with a recessed portion 254 for installation. A space is formed behind the engine 14 in the recess 7a for installing a purification device in the front of the grain tank 7, and an exhaust gas purification device 74 is disposed. The grain discharge conveyor 8, the tip of which is accommodated in the conveyor support 90, is accommodated in the grain discharge conveyor installation recess 7b on the upper surface of the grain tank 7 along the grain discharge conveyor installation recess 7b. In addition, the grain conveyor 63 is disposed in the grain conveyor installation recess 7c on the left side of the grain tank 7, and the rice discharge port at the top of the grain conveyor 63 is installed at the top of the grain conveyor installation recess 7c. Connected to the receiving port. Additionally, a urea solution tank 174, which will be described later, is disposed in the recess 254 for installing the urea solution tank at the outer corner of the traveling body 1 on the rear surface of the grain tank 7.

As shown in FIGS. 1 to 5, 15, and 16, the horizontal conveyor 8b is disposed at the bottom of the grain tank 7 in the front-back direction, and the rear end of the horizontal conveyor 8b is vertically extended. The lower end (base end) side of the conveyor 8a is connected. Additionally, an outer bottom plate 7d and an inner bottom plate 7e are installed at the bottom of the grain tank 7, and the outer bottom plate 7d and an inner bottom plate 7e are inclined toward the horizontal transfer conveyor 8b. , the grains inside the grain tank 7 are flowed in the direction of the horizontal transfer conveyor 8b. The horizontal transfer conveyor 8b is installed to extend along the front and rear of the bottom of the grain tank 7, and conveys grains flowing along the bottom plate of the grain tank 7 to the rear vertical take-out conveyor 8a.

The vertical pull-out conveyor (8a) is connected at the bottom to the lower side succession case (8c) installed at the rear end of the horizontal transfer conveyor (8b) protruding from the rear end surface of the grain tank (7), and carries grain along the rear end surface of the grain tank (7). It is installed extending upward toward the tank (7). The grain discharge conveyor 8 is connected at its rear end to an upper succession case 8d connected to the top of the vertical take-out conveyor 8a, and extends toward the front. Therefore, the grains conveyed from the horizontal transfer conveyor 8b of the grain tank 7 are loaded into the vertical take-out conveyor 8a through the lower end side succession case 8c. And in the vertical take-out conveyor 8a, when grain is conveyed upward, it will be carried in to the grain discharge conveyor 8 through the upper end side succession case 8d. Moreover, in the grain discharge conveyor 8, grains are conveyed forward and discharged from the rice discharge port 9.

The lower end (base end) side of the vertical take-out conveyor 8a is connected to the grain tank 7 through the lower end side succession case 8c. In addition, the bottom of the lower end succession case 8c is fitted with the protrusion 40 provided on the traveling body 1, and the grain tank 7 to which the lower end succession case 8c is fixed is attached to the traveling body 1. It is supported so that it can be rotated. The vertical pull-out conveyor 8a is provided with a lower barrel case 41 connected to the lower side succession case 8c, and an upper barrel case 42 connected to the upper side succession case 8c, and the lower barrel case ( The upper barrel case 42 is rotatably connected to 41).

The upper barrel case 42 is provided with a turning gear 43 on the lower outer peripheral surface, and this turning gear 43 is aligned with a gear (not shown) installed on the rotation axis of the turning motor (actuator) 44. It has a configuration that allows rotation based on rotation from the turning motor 44. The upper barrel case 42 is held by a U-shaped support body 45 with both ends connected to the rear surface of the grain tank 7, and its lower portion is erected from the traveling body 1. It is held by a U-shaped support body 47 connected to the top of one support frame 46. That is, the upper barrel case 42 is pivotably supported by the supports 45 and 47 fixed to the grain tank 7 and the support frame 46. As a result, the upper barrel case 42 is rotated by the turning motor 44, causing the grain discharge conveyor 8 to pivot with respect to the grain tank 7 (with the vertical take-out conveyor 8a as the rotation axis). .

The lower barrel case 41 has its lower end (proximal end) side fixed to the grain tank 7 through the lower barrel case 8c, while its upper end is fitted with the upper barrel case 42, and the upper barrel case ( 42) is rotatable relative to the lower cylinder case 41. The swing motor 44 is mounted and fixed on a motor fixing bracket 48 installed on the side of the support 47, and is attached to the motor axis end of the swing motor 44 protruding from the bottom of the motor fixing bracket 48. The turning gear 43 of the upper cylinder case 42 is meshed with the installed gear. A U-shaped support body 49 that holds the upper part of the lower barrel case 41 is fixed to the bottom of the motor fixing bracket 48. That is, the lower barrel case 41 is fixed to the grain tank 7 at its lower end, and is pivot-supported at its upper end by the support body 49 fixed to the support frame 46.

As shown in FIGS. 5, 7, and 8, the storage position of the traveling body 1 is provided with a lock pin 161 and a lock arm 162 for fixing and supporting the grain tank 7, and a threshing device 5 ) Attach the lock pin 161 to the upper right side of the grain tank 7, and attach the lock arm 162 to the left side of the front of the grain tank 7. The lock pin fixing frame 160 is installed on the right side of the upper surface of the threshing device 5, and the lock pin 161 is fixed to the distal end of the lock pin fixing frame 160. In addition, a lock release lever 164 is attached to the front of the grain tank 7, the lock release lever is connected to the lock arm 162 through the linkage rod 163, and the lock release lever is operated to remove the lock release lever 161 from the lock pin 161. The lock arm 162 is configured to be detachable. The grain tank 7 is configured to be rotatable around the axis of the vertical take-out conveyor 8a by disengaging the lock arm 162 of the lock release lever.

A wheel 167 for sliding on the traveling body 1 is supported on the lower edge of the front cross-section of the grain tank 7, and the wheel 167 moves on the traveling body 1 in the left and right directions to move the grain tank 7. ), the grain tank 7 can be opened and closed while supporting the front of the grain tank 7. Additionally, a rail 168 that receives the wheels 167 of the grain tank 7 is installed on the right side (outside the machine) of the traveling body 1. The rail 168 has a shape bent downward toward the outside (right side) of the machine, and when the grain tank 7 opened to the outside side (right side) is closed, the grain tank 7 is placed on the traveling body 1. The wheel 167 is guided to the upper surface of the traveling body 1 so that it can be mounted. Additionally, a positioning member 169 is installed at the lower edge of the front end surface of the grain tank 7. The positioning member 169 is made of a plate member installed on the outer (right) side of the wheel 167, and its outer (right) end is bent downward into a shape according to the curvature of the rail 168. Therefore, when the grain tank 7 is closed, the bent portion of the positioning member 169 contacts the bent portion of the rail 168, thereby fixing the installation position of the grain tank 7.

The vertical pull-out conveyor 8a is fixed to the grain tank 7 so as to be installed upright along the rear end surface of the grain tank 7, and is rotatably supported by the protrusion 40 and the supports 45, 47, and 49. . Additionally, the front end surface of the grain tank 7 is supported by wheels 167 sliding on the traveling body 1. Therefore, the grain tank 7 can be rotated toward the outside of the machine around the axis of the vertical take-out conveyor 8a, and the right side of the threshing device 5 and the rear of the engine room 97, which will be described later, can be opened. Additionally, at the rear of the grain tank 7, a rear cover 30 that covers the periphery of the vertical take-out conveyor 8a is installed to be openable and closed. Additionally, a bottom cover 165 is detachably installed on the outer surface of the outer bottom plate 7d of the grain tank 7.

Next, as shown in FIGS. 9 to 11, the engine room frame 91 is erected and installed on the traveling body 1, and the rear side of the diesel engine 14 mounted on the upper surface side of the traveling body 1 is installed as an engine. Surround with room frame (91). The engine room frame 91 includes a square pipe-shaped left strut 92 disposed on the left, an inverted U-shaped right strut 93 disposed on the right, and left and right struts 92 and 93a. It has a horizontal frame 94 in the shape of a square pipe in which both ends are integrally fixed. The horizontal frame 94 has one end connected to the top of the left support member 92, while the other end is connected to and fixed to a vertical frame 93a in the shape of a square pipe fixed to the top of the right support member 93. Additionally, as shown in FIG. 1, a conveyor support body 90 is installed on the upper end side of the left support body 92, and the grain discharge conveyor 8 is supported at the storage position through the conveyor support body 90.

In addition, rubber pressure-welded legs (not shown) installed on the rear bottom of the driving cabin 10 are pressure-welded to the upper surfaces of the left and right pedestals 96 of the transverse frame 94 from the upper side. The leg body is in contact with each stand 96 of the transverse frame 94, and the rear part of the driving cabin 10 is supported so as to be able to contact and separate from it in the vertical direction. A diesel engine 14 is installed inside the engine room 97 formed by the bottom side of the operating cabin 10 and the engine room frame 91.

Additionally, it is provided with an air cleaner 123 that supplies outside air to the diesel engine 14 and a pre-cleaner 124 that introduces outside air into the air cleaner 123. An air cleaner (123) is placed on the right side of the exhaust gas purification device (74) on the upper surface of the engine room (97), and a pre-cleaner (124) is placed on the right side in front of the grain tank (7) and above the engine room (97). And, the air cleaner 123 is connected to the pre-cleaner 124 through the air supply pipe 125. Combustion air is introduced from the pre-cleaner 124 through the air cleaner 123 to the compressor case 118a of the supercharger 118 of the diesel engine 14. The air cleaner 123 is fixed at the rear right side of the transverse frame 94 of the engine room frame 91 and is located on the front right side of the exhaust gas purification device 74.

4 and 9, a supercharger 118 that forcibly blows air into the diesel engine 14 is disposed at the exhaust gas outlet (exhaust manifold 115) of the diesel engine 14. The supercharger 118 is installed on the upper front side of the diesel engine 14, and a compressor case 118a with a built-in blower foil is installed on the right side, and a turbine case 118b with a built-in turbine foil is installed on the left side. I'm doing it. And, the intake air introduction side installed 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. Meanwhile, the exhaust outlet pipe 99 installed at the left end of the turbine case 118b is connected to the exhaust gas inlet (DPF inlet pipe) of the exhaust gas purification device 74, which is a post-processing device, through the bendable corrugated box-shaped exhaust inlet pipe 98. Connect to the exhaust connection pipe (119) connected to (81)).

3, 4, and 9, the exhaust gas purification device 74 including the first case 75 and the second case 229, the air cleaner 123, and the pre-cleaner 124 It is arranged on the back of the engine room frame 91 divided into left and right sides with respect to the engine 14. That is, with respect to the supercharger 118 in front of the engine 14, the air cleaner 123 and pre-cleaner 124, which serve as an intake system, are disposed on the compressor case 118a side on the right side, while the turbine case 118b on the left side. ) On the side, an exhaust gas purification device 74, which serves as an exhaust system, is disposed. In this way, since the intake path and exhaust path of the engine 14 equipped with the supercharger 118 are arranged separately to the left and right, the intake path and exhaust path can be configured as a single path, and high temperature exhaust gas can pass through. The intake path can be spaced apart from the exhaust path.

Next, the attachment structure and support structure of the exhaust gas purification device 74 will be described with reference to FIGS. 4 to 13. It is a holding body that arranges the first case 75 and the second case 229 in parallel, and includes a pair of front case fixtures 100 and rear case fixtures 101 and four fastening bands 85. . The first case 75 is fixed to the left loading portion of the front case fixture 100 and the rear case fixture 101 by the front and rear fastening bands 85, and the front case fixture 100 and the rear case fixture 101 are attached to each other. The second case 229 is fixed to the right loading portion of the case fixture 101 by the front and rear fastening bands 85. Two fastening bands 85 are each mounted on the upper surfaces of the first case 75 and the second case 229 in a half-wound shape, and each fastening band 85 is attached to each case fixture 100 and 101. ) is bolted to the lower end. As a result, the first case 75 and the second case 229, each of which has an elongated cylindrical shape in the front-back direction, are arranged horizontally.

A pair of right support frames 102 and left support frames 103 made of sheet metal with L-shaped end surfaces are attached to the left and right ends of the front case fixture 100 and the rear case fixture 101 (support posture). Adjustably fastened with bolts, the case fixtures 100, 101 and the support frames 102, 103 are connected to the square frame shape, and the first case 75 and the second case are connected to them through a fastening band 85. The case 229 is fixed to form an exhaust gas purification device 74 as an exhaust purification unit. In addition, the inner diameter dimensions of the bolt through holes of the support frames 102 and 103 are formed to be larger than the outer diameter dimensions of the bolts connecting the case fixtures 100 and 101 and the support frames 102 and 103, and the support frames Bolts are roughly inserted into the bolt through holes of the bodies 102 and 103, and when fastening the case fixtures 100 and 101 and the support frames 102 and 103, the case fixtures 100 and 103 are connected to each other. While supporting the connection posture of the support frames 102 and 103 with respect to 101 at a predetermined posture, bolts are screwed to the case fixtures 100 and 101 and the support frames 102 are attached to the case fixtures 100 and 101. , 103) is configured to be fastened with bolts.

The exhaust gas purification device 74 is supported on the traveling body 1 by fixing the right support frame 102 to the case support frame 250 and the case support bracket 253. The case support frame 250 supports the right support frame 102 through brackets 250a and 250b. The case support bracket 253 supports the left support frame 103.

4 and 8 to 12, the case support frame 250 is disposed on the right side of the threshing device 5 so that the longitudinal direction is approximately in the front-back direction, and is located on the front left side of the grain tank 7 ( It is arranged below the recess 7a for purification device installation installed on the threshing device 5 side). The front end of the case support frame 250 is disposed to the left of the rear end, and the longitudinal direction of the case support frame 250 is inclined with respect to the front-back direction.

Additionally, the front and rear case support frames 250 are arranged so that their longitudinal direction is substantially horizontal. The front ends of the case support frame 250 are connected to the middle portion of the transverse frame 94 at an approximately central position in the longitudinal direction (left and right directions). The frames 94 and 250 are connected by bolting a case support bracket 94a installed from the upper surface to the rear of the frame 94 and a front bracket 250d installed on the front end surface of the frame 251.

In addition, the rear end sides of the case support frame 250 are supported by a case support support frame 251 erected on the traveling body 1. The frames 250 and 251 have an upper bracket 251a installed on the upper surface of the frame 251 and a lower bracket 250c installed on the lower surface of the middle portion of the rear end of the frame 250 away from the rear end of the frame 250. They are connected by bolting. Additionally, in front of the lower bracket 250c, a lower bracket 250a protruding to the right is welded and fixed to the middle portion of the case support frame 250.

The lower bracket 250a is disposed rearward than the central position in the longitudinal direction of the frame 250 (between the central position and the lower bracket 250c). The upper bracket 250b is welded and fixed to the upper surface of the lower bracket 250a. The lower surface of the right support frame 102 is detachably fixed to the upper surface of the upper bracket 250b with bolts. The height position of the upper surface of the upper bracket 250b is higher than the upper surface of the horizontal frame 94 and the upper surface of the case support frame 250.

As shown in FIG. 4, FIG. 5, and FIG. 8, the left support frame body 103 is supported on the upper surface side of the threshing apparatus 5. The case support bracket 253 is bolted to the right side of the upper surface of the threshing device 5, and the lower surface of the left support frame 103 is bolted to the upper surface of the case support bracket 253. The case support bracket 253 is bolted by inserting the case of the threshing device 5 into the case support reinforcement member 228 attached to the threshing right upper frame 227 of the threshing device 5. The case support reinforcement member 228 is provided with a plurality of ribs provided perpendicularly to the contact surface with the case of the threshing device 5 at the attachment position of the case support bracket 253. In addition, the case support bracket 253 is provided with a threshing device 5 so that the contact surface of the bracket 253 and the left support frame 103 and the contact surface of the upper bracket 250b and the right support frame 102 are at substantially the same height. ) It is attached to the upper surface. In this way, as shown in FIGS. 4 and 5, the first case 75 and the second case 229 are supported at the upper position in the recessed part 7a of the grain tank 7.

4, 7, and 9, the case support frame 250 is positioned laterally from the case support support frame 251 side at a position between the air cleaner 123 and the purification inlet pipe 81. It is installed to extend toward the frame 94. As a result, not only can space be secured for connecting the corrugated box-shaped exhaust inlet pipe 98 disposed below the horizontal frame 94 and the purification inlet pipe 81 of the first case 75, but also the air Buffering with the cleaner 123 can also be prevented. In addition, since the case support frame 250 is placed at a position between the intake path including the air cleaner 123 and the exhaust path connected to the first case 75, the case support frame 250 The impact of heat emissions from the exhaust path can be reduced.

4 and 5, the first case 75 and the second case ( An exhaust gas purification device 74 having 229 is disposed. As a result, the exhaust gas purification device 74 can be placed close to the engine 14 between the grain tank 7 and the engine room 97, and the exhaust gas purification device 74 has a high temperature. It can prevent workers from coming into contact with In addition, since exhaust heat from the engine room 97 can be guided to the exhaust gas purification device 74, the exhaust gas purification device 74 can be placed in a high temperature environment required for purification of exhaust gas. , a high purification effect can be maintained in the exhaust gas purification device 74.

Additionally, the first case 75 and the second case 229 of the exhaust gas purification device 74 are arranged side by side in the longitudinal direction forward and backward. And the 1st case 75 is arrange|positioned at the threshing apparatus 5 side with respect to the 2nd case 229. As a result, the first case 75 can be placed in a position close to the exhaust port of the engine 14, the exhaust path from the engine 14 to the first case 75 is configured as a short path, and the first case 75 Playback processing in the case 75 can be maintained at high performance. In addition, since the second case 229 and the urea mixing pipe 239 are covered with the grain tank 7, the second case 229 and the urea mixing pipe 239 are connected to the grain tank (7) at the rear of the engine room 97. 7) It can be placed in a high-temperature environment surrounded by urea water to prevent freezing, and at the same time, the purification ability of the second case 229 can be maintained at a high level.

Moreover, the 1st case 75 and the 2nd case 229 are supported horizontally from the threshing apparatus 5 to the recessed part 7a of the grain tank 7, and are arranged in parallel. By supporting the first case 75 and the second case 229 horizontally, the exhaust gas purification device 74 can be compactly placed at a position higher than the engine 14, and the high temperature exhaust from the engine 14 can be removed. A structure that makes it easy to guide gas to the exhaust gas purification device 74 can be realized. In addition, by arranging the exhaust gas purification device 74 at a higher position than the engine 14, it is possible to prevent water generated by condensation due to a temperature drop when the engine 14 is stopped from accumulating in the exhaust gas purification device 74. there is.

In addition, the urea mixing pipe 239 connected between the purification outlet pipe 82 of the first case 75 and the SCR inlet pipe 236 of the second case 229 is connected to the first case 75 and the second case 75. It is arranged parallel to the longitudinal direction of (229). As a result, the first case 75, the second case 229, and the urea mixing pipe 239 are configured as an integrated unit structure, and the exhaust gas purification is provided inside the concave portion 7a in the front of the grain tank 7. The device 74 can be installed compactly. Therefore, the installation space for the exhaust gas purification device 74 can be easily secured, and the concave portion 7a of the grain tank 7 is configured to be narrow, thereby securing the grain storage capacity of the grain tank 7. can do.

Moreover, as shown in FIG. 13, the purifier cover body 261 which becomes a heat-insulating member is installed in the right part of the upper surface of the threshing apparatus 5. The front side of the purifier cover 261 is bolted to the lock pin fixing frame 160, and the rear side is fixed to a rod-shaped member erected on the upper right side of the casing of the threshing device 5, thereby forming the exhaust gas purification device 74 ) is placed in the left room. The left side (thresher 5 side) of the exhaust gas purification device 74 is covered by the purification device cover body 261. As a result, the exhaust gas purification device 74 can be placed in a high temperature environment, and the influence of heat radiation from the exhaust gas purification device 74 on surrounding components can be reduced.

Next, as shown in FIGS. 14 to 22, urea water is added to the urea water tank 174 containing urea water (urea aqueous solution for selective catalytic reduction) and the urea water injection portion 240 of the urea mixing pipe 239. It is equipped with a urea water supply device 175. 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, thereby causing the urea water injection valve 178 of the urea water injection unit 240. Urea water is sprayed into the urea mixing pipe 239 from (dosing module).

As shown in FIGS. 14 to 18, the urea solution tank 174 has a vertical shape and is disposed in the recess 254 provided in the grain tank 7. Figure 17 shows a state in which the bottom cover body 165 and the right cover body 166 constituting the right side of the grain tank 7 from the upper side of the bottom cover body 165 are separated, and the grains in the grain tank 7 The inside of the receiving part 260 is visible. The concave portion 254 is provided at a corner portion outside the traveling body 1 on the rear side of the grain tank 7. The concave portion 254 has a bottom portion 254a on which the urea tank 174 is mounted. Additionally, a tank mounting base 255 is disposed at the bottom 254a of the concave portion 254. A urea tank 174 is mounted on the tank mount 255. Since the grain tank 7 is provided with a recess 254 in which the urea tank 174 is placed, the space for placing the urea tank 174 is secured without increasing the external dimensions of the combine. In addition, since the concave portion 254 has a bottom portion 254a on which the urea solution tank 174 is mounted, a separate member for mounting the urea solution tank 174 is not required. Therefore, it is possible to reduce costs compared to the case of separately installing a member for mounting the urea water tank 174. Additionally, since the concave portion 254 is installed on the rear side of the grain tank 7, the urea solution tank 174 is not affected by heat from the engine 14.

As shown in Figures 17 and 18, the urea solution tank 174 is detachably fixed within the concave portion 254 by two bands 256 arranged and attached in the vertical direction. The material of the band 256 is, for example, an elastic material, in this case rubber. Annular metal fittings 257 are installed at both ends of each band 256. In addition, at two locations on the left side of the concave portion 254 at the rear of the grain tank 7 and at two locations on the inner surface 254b on the front side of the traveling body 1 of the concave portion 254, total 4 Two hook fittings 258 are welded and fixed. The band 256 is attached to the grain tank 7 by attaching the annular fitting 257 to the hook fitting 258. In addition, a fall prevention stay 259 is installed in the grain tank 7 to prevent the urea tank 174 from falling. One end of the fall prevention stay 259 is fixed to the rear of the grain tank 7 at a position to the left of the concave portion 25 at the rear of the grain tank 7, and the other end is fixed to the inner surface of the concave portion 254. It is fixed at (254b).

As shown in Figures 17, 18, and 22, the urea solution tank sensor unit 271 is removably attached to the upper surface opening of the urea solution tank 174. The urea tank sensor unit 271 includes a sensor unit body 272 that functions as a lid of the opening 5, a urea water supply pipe 179 (reducing agent pipe) connected to the sensor unit main body 272, and a urea water return pipe ( 180) (reducing agent piping), coolant transfer pipe 273, coolant return pipe 274, temperature sensor 183, liquid level sensor 184, urea water quality sensor 186 (e.g., concentration sensor) and sensor It is provided with a control unit 187, etc. The urea water supply pipe 179 supplies urea water to the urea water supply device 175. The urea water return pipe 180 returns urea water from the urea water supply device 175 to the urea water tank 174. The sensor control unit 187 controls the operation of each sensor 183, 184, and 186. The cooling water transfer pipe 273 and the cooling water return pipe 274 are connected within the urea tank 174. By sending the engine coolant heated by the engine 14 from the coolant transfer pipe 273 to the coolant return pipe 274 and passing it through the urea tank 174, freezing of the urea water is prevented.

As shown in FIG. 22, the urea water supply device 175 includes a urea water pump 171 that pressurizes the urea water in the urea water tank 174 and an electric motor for urea water supply that drives the urea water pump 171 ( 172). A urea water supply pipe 179 and a urea water return pipe 180 are connected between the urea water tank 174 and the urea water supply device 175. In addition, an engine controller 181 that performs fuel injection control of the diesel engine 14, etc., and a urea injection controller 182 that controls the operation of the urea water supply device 175 and the urea water injection valve 178 are provided. I'm doing it.

12 and 14, the urea water supply device 175 is welded to the left side and front side of the case support support frame 251 that supports the exhaust gas purification device 74 (second case 229). It is fixed by bolting to the fixed pump support (support for supply device) 185. The urea water supply device 175 is attached to the upper left side of the pump support body 185. The urea water supply device 175 and the pump support 185 are disposed at a height position between the height position of the exhaust gas purification device 74 and the height position of the urea water tank 174. 4 to 8, the element injection controller 182 is attached to the rear side of the controller support body 189 attached to the left side of the case support frame 251. The controller support body 189 is bolted to the controller bracket 251b welded to the left side of the case support frame 251.

As shown in FIGS. 14 and 22 , a urea water injection pipe 177 connecting the urea water supply device 175 and the urea water injection valve 178 is provided. The urea injection controller 182 controls the operation of the urea water supply device 175 and the urea water injection valve 178, and sprays and injects urea water 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. Additionally, a coolant transfer pipe 275 and a coolant return pipe 276 are connected between the urea water injection valve 178 and the engine 14. The ends of the cooling water transfer pipe 275 and the cooling water return pipe 276 on the urea water injection valve 178 side are respectively connected to pipe connection parts provided on the urea water injection valve 178. Additionally, the cooling water transfer pipe 275 and the cooling water return pipe 276 are connected within the urea water injection valve 178. The engine coolant heated by the engine 14 is sent from the coolant transfer pipe 275 through the inside of the urea water injection valve 178 to the coolant return pipe 276, thereby reducing the amount of urea water in the urea water injection valve 178. Freezing is prevented.

As shown in FIG. 14, one end of the urea water injection pipe 177 is connected to a pipe connection provided at the rear of the urea water injection valve 178, and is guided to the left from the connection position and then guided downward. and is led to the urea water supply device 175 through the purification outlet pipe 82, the urea injection unit 249, and the lower portion of the second case 229. In addition, the coolant transfer pipe 275 and the coolant return pipe 276 are guided from the connection portion with the urea water injection valve 178 to the lower part of the second case 229 roughly along the urea water injection pipe 177, and It is guided forward along the frame 250 through the vicinity of the lower side of the approximately central portion of the frame 250 in the longitudinal direction before and after the case support, and is guided downward from the front middle portion of the frame 250 to the engine 14. there is. With the above piping configuration, a compact piping configuration can be realized while reducing the influence of heat from the exhaust gas purification device 74 and the tail pipe 83.

In addition, the temperature sensor 183, liquid level sensor 184, and urea quality sensor 186 of the urea tank sensor unit 271 are electrically connected to the urea injection controller 182. Additionally, the urea injection controller 182 is electrically connected to a temperature sensor 183, an upstream NOx sensor 188, and a downstream NOx sensor 189. The temperature sensor 183 detects the temperature of the exhaust gas in the urea solution injection unit 249. The upstream NOx sensor 188 detects NOx in the exhaust gas that has passed through the diesel oxidation catalyst 79 and the soot filter 80 in the first case 75. The downstream NOx sensor 189 detects NOx in the exhaust gas that has passed through the SCR catalyst 232 and the oxidation catalyst 233 in the second case 229. The urea injection controller 182 controls the injection of urea water according to the detection signals of the temperature sensor 183 and the NOx sensors 188 and 189.

Additionally, the engine controller 181 and the urea injection controller 182 are electrically connected. In this way, the urea water is supplied into the urea mixing pipe 239 at an appropriate time according to the operating status of the diesel engine 14, etc. In addition, the engine coolant is supplied to the coolant transfer pipe 273 and the coolant return pipe 274 by opening and closing the valve 277 installed in the coolant transfer pipe 273 under the control of the urea injection controller 182. It is done. In this way, the urea water in the urea water tank 174 is heated at an appropriate time depending on the temperature situation of the urea water in the urea water tank 174, etc.

As shown in FIG. 14, the urea water supply pipe 179 and the urea water return pipe 180 are once introduced upward from the urea water supply device 175 and then bent rearward to cover the rear rear of the pump support body 185. It is guided to the rear side of the case support strut frame 251, is further guided to the traveling body 1 side along the rear side of the case support strut frame 251, passes below the grain tank 7, and passes through the urea tank 174. ) is being guided to the side. In addition, the coolant transfer pipes 273 and 275 and the coolant return pipes 274 and 276 are guided from the engine 14 to the front middle portion of the lower side of the frame 250 before and after the case support, and are also guided to the rear along the frame 250. It is guided to the rear side of the case support frame 251. In addition, the coolant transfer pipe 273 and the coolant return pipe 274 are directed to the traveling body 1 along the urea water supply pipe 179 and the urea water return pipe 180 and along the rear side of the case support support frame 251. It is delivered, passes through the lower part of the grain tank 7, and is delivered to the urea tank 174 side. In addition, the coolant transfer pipe 275 and the coolant return pipe 276 are led from the rear side of the case support frame 251 to the urea water injection valve 178. With the above piping configuration, a compact piping configuration can be realized. Additionally, the mountability of the urea water supply device 175 or piping is improved. In addition, the pipes 179, 180, 273 to 276 are piping clamps (not shown) attached to the traveling body 1, the rear of the grain tank 7, the case support frame 250, the case support support frame 251, etc. The position is determined by (omitted).

In addition, the urea water supply device 175 is disposed at a position higher than the urea water tank 174 and lower than the urea water injection valve 178, so that after stopping injection of urea water, the urea water supply device 175 ) and the height difference between the urea water injection valve 178, which has the effect of causing the urea water remaining in the urea water injection valve 178 or the urea water injection pipe 177 to flow toward the urea water supply device 175.

Next, as shown in FIGS. 15 to 20, the grain tank 7 uses the vertical take-out conveyor 8a (support member) installed on the rear side of the traveling body 1 of the grain tank 7 as a turning point to the traveling body ( 1) It is installed rotatably on the outside. In the grain tank 7, the concave portion 254 is installed on the side (rear) of the grain tank 7 closest to the vertical take-out conveyor 8a (rotation point). As a result, the urea solution tank 174 can be placed near the pivot point. In addition, with respect to the urea water supply pipe 179, the urea water return pipe 180, the cooling water transfer pipe 273, and the cooling water return pipe 274, the deflection during rotation of the grain tank 7 can be reduced. . In addition, by rotating the grain tank 7 outside the traveling body 1, the right side of the threshing device 5 and the rear of the engine room 97 can be opened, so the operator can use the exhaust gas purification device 74 or the urea solution supply device. Various tasks such as maintenance of (175) are easily performed.

As shown in FIGS. 15 to 20, the concave portion 254 is formed at a position outside the traveling body 1 than the vertical take-out conveyor 8a (rotation point). In addition, the urea water supply pipe 179, the urea water return pipe 180, the cooling water transfer pipe 273, and the cooling water return pipe 274 connected to the urea water tank 174 are opposed to the rear side of the grain tank 7. The part is guided from the urea solution tank 174 to the center of the traveling body 1 from the vertical take-out conveyor 8a in the left and right directions of the traveling body 1. This can prevent the pipes 179, 180, 274, and 275 from interfering with the rotation of the grain tank 7. In addition, the pipes 179, 180, 274, and 275 are guided from a position on the center side of the traveling body 1 to the exhaust gas purification device 74 side through the lower part of the grain tank 7 than the vertical take-out conveyor 8a. there is. This configuration also prevents the pipes 179, 180, 274 and 275 from interfering with the rotation of the grain tank 7.

As shown in FIGS. 2, 3, 15, and 19 to 21, the rear cover 30 is provided in each portion outside the traveling body 1 of the grain tank 7 and on the rear side. The rear cover 30 is supported on the grain tank 7 so as to be rotatable outward from the traveling body 1 through two hinges 192 attached to the above-mentioned corner portions of the grain tank 7. When the rear cover 30 is closed, the rear cover 30 covers the urea tank 174. This can reduce exposure of the urea solution tank 174 to direct sunlight.

In addition, the water supply port 174a of the urea water tank 174 is not visible from the side of the combine body when the rear cover 30 is closed. That is, when performing water supply work to the urea water tank 174, the operation of opening the rear cover 30 is required. On the other hand, the oil supply port 32 of the fuel tank 31 is extended to the left side of the threshing device 5 and is exposed to the outside as described above. In addition, following the operation of opening the rear cover 30 when supplying water to the urea water tank 174 prevents mistakes in adding fuel and urea water. In addition, the oil supply port 32 of the fuel tank 31 and the water supply port 174a of the urea tank 174 are arranged separately on the left and right sides of the traveling machine 1, so that the fuel and Mistakes in adding urea can be prevented.

<Second Embodiment>

Figures 23 and 24 are illustrations of a modified example in which a supply stand capable of mounting a container 263 for water supply of urea water is installed near the urea water tank 174. The water supply port 174a of the urea water tank 174 is installed at a position higher than, for example, the worker's waist, and there is a problem that water supply work is difficult because the height position is high. Therefore, as shown in FIGS. 23 and 24, the supply stand 280 attached to the vertical take-out conveyor 8a disposed on the rear side of the urea solution tank 174 may be installed.

The supply station 280 surrounds the vertical take-out conveyor 8a and is connected to the vertical take-out conveyor 8a by a pair of supply band bands 281, 281 and a supply stand support member 283 attached to the vertical take-out conveyor 8a. It is attached. The band 281 has an approximately U-shaped shape divided into two by a curved portion of the above-shaped shape. One end side (the approximately U-shaped curved portion) of the band 281 is connected by a bolt 284 for adjusting the attachment position. The other end of the band 281 (the substantially U-shaped tip) is fastened to the supply stand support member 283, for example, with a bolt. The supply base support member 283 is provided with a rod member 285 that serves as a pivot point of the supply base 280. The supply stand 280 is installed so as to be able to rotate upward from the substantially horizontal direction between the substantially horizontal direction and the substantially vertical direction, using the rod member 285 as a pivot point.

As shown in FIG. 24, when supplying water to the urea water tank 174, the supply station 280 is arranged in a substantially horizontal direction so that the water supply container 263 can be placed on the supply station 280, and the supply station 280 ) When not in use, the distal end of the supply platform 280 is placed on the side of the vertical pull-out conveyor 8a and the supply platform 280 is folded. By arranging the supply stand 280 so that it can be folded in this way, the supply stand 280 can be compactly stored when not in use. Additionally, the supply stand 280 is attached to the vertical take-out conveyor 8a so that it rotates together with the vertical take-out conveyor 8a, so it can be used at any time. In addition, the end of the band 281 on the opposite side to the supply base support member 283 is connected by a bolt 284, and by tightening the bolt 284, the supply base 280 can be adjusted according to the usage of the supply base 280. The height position and installation angle are adjustable.

The combine in the first and second embodiments includes an engine 14 as a power source mounted on the traveling body 1, an exhaust gas purification device 74 that removes nitrogen oxide substances in the exhaust gas of the engine 14, and , a reducing agent tank 174 that accommodates the reducing agent supplied to the exhaust gas purification device 74, and a grain tank 7 that carries in the harvested grain. In addition, the grain tank 7 is provided with a recess 254 for a reducing agent tank in which the reducing agent tank 174 is mounted in the middle portion of the side.

The combine is configured so that the grain tank 7 can be rotated outside the traveling body 1, and a recess 254 for the reducing agent tank is formed near the pivot point of the grain tank 7. The traveling direction of the traveling body 1 is set to the front and rear direction, and the pivot point of the grain tank 7 is installed at the rear of the grain tank 7, so that the front of the grain tank 7 is opened to the outside of the grain tank 7. Meetings are possible. The recess 254 for the reducing agent tank is formed on the side of the grain tank 7 closer to the support member.

The engine 14 is disposed on the front side of the grain tank 7, and is installed upright from the traveling body 1 below the purification device installation recess 7a notched in front of the inside side of the grain tank 7. A purification device support frame 251 is installed, and an exhaust gas purification device 74 is installed on the purification device support frame 251. The recess 254 for the reducing agent tank is formed by notching the rear side of the grain tank 7, and the reducing agent tank 174 is installed at a position outside the traveling body rather than the pivot point. Reducing agent pipes 179 and 180 connecting the reducing agent tank 174 and the exhaust gas purification device 74 are disposed along the grain tank 7.

The reducing agent pipes 179 and 180 are guided from the reducing agent tank 174 to the center of the traveling body from the pivot point, pass through the lower part of the grain tank 7, and are led to the front of the traveling body 1, and are guided to the purifier support frame 251. ) is guided to the exhaust gas purification device 74. A reducing agent water supply device 175 that supplies a reducing agent to the exhaust gas purification device 74 is installed in the reducing agent pipes 177, 179, and 180. The reducing agent water supply device 175 is fixed to the supply device support 185 installed on the purification device support frame 251.

Since the grain tank 7 of the combine is provided with a recess 254 for the reducing agent tank in which the reducing agent tank 174 is disposed, it is possible to secure a space for placing the reducing agent tank 174 without increasing the external size of the combine. You can. In addition, the grain tank 7 is configured to be rotatably installed on the outside of the traveling body 1, and the recess 254 for the reducing agent tank is a rotation point of the grain tank 7 on the side of the grain tank 7. By installing them on the side close to , the bending of the reducing agent pipes 179 and 180 connected to the reducing agent tank 174 during rotation of the grain tank 7 can be reduced.

The recess 254 for the reducing agent tank is formed at a position outside the traveling body rather than the pivot point, and the reducing agent pipes 179 and 180 connected to the reducing agent tank 174 are connected from the reducing agent tank 174 to the grain tank 7. If it is guided to the center side of the traveling body 1 rather than the rotation point of , it is possible to prevent the reducing agent pipes 179 and 180 from interfering with the rotation of the grain tank 7. In addition, when the reducing agent pipes 179, 180 pass through the lower part of the grain tank 7 and are guided toward the exhaust gas purification device 74, the reducing agent pipes 179, 180 prevent the rotation of the grain tank 7. can be prevented.

In addition, the traveling direction of the traveling body 1 is made to be forward and backward, and the engine 14 is disposed on the front side of the grain tank 7, and the recess 254 for the reducing agent tank is located in the grain tank 7. If formed on the rear side, the reducing agent tank 174 can be prevented from being affected by heat from the engine 14.

Next, a display screen that displays various information during harvesting work and non-reaping work of a combine will be described with reference to the drawings. First, referring to Fig. 25, the structure within the driving cabin 10 will be described. As described above, the driving cabin 10 is provided with a control handle 11 that changes the moving (turning) direction of the traveling body 1 and a driving seat 12 on which the operator sits. A main gear lever 15 for shifting gears of the traveling body 1 is disposed on the side column 210 located on the left side of the driver's seat 12. Although the details are not shown, the sub-shift lever 16, threshing clutch lever 17, and reaping clutch lever 18 are also arranged on the side column 210.

Inside the handle foil 215 of the control handle 11, a display device 211 (display portion) capable of displaying various types of information about the combine in the form of letters, symbols, and images is disposed. The display device 211 includes a liquid crystal monitor 212 and an outer case 213 that accommodates it. The display device 211 is fixed to the side of the front column 216 that supports the control handle 11 and is not connected to the control handle 11. For this reason, even if the control handle 11 is rotated, the display device 211 does not function, and the screen is always easily visible to the operator. A display switching switch 214, which is an example of a display switching member, is provided on the outer peripheral side of the liquid crystal monitor 212 in the outer case 213. The display switching switch 214 is a non-lock type push switch that emits one ON pulse signal under one push.

As shown in FIG. 22, a display controller 351 as a separate ECU (Electronic Control Unit) is installed inside the display device 211. The liquid crystal monitor 212 and the display switching switch 214 are electrically connected to the display controller 351 and to an alarm buzzer 328 that sounds to alert the operator. Additionally, the engine controller 181 is electrically connected to the fuel sensor 221. The fuel sensor 221 detects the remaining amount of fuel in the fuel tank 31 (see FIG. 1, etc.).

Moreover, the combine controller 224 provided with a plurality of ECUs, for example, is electrically connected to the display controller 351. The combine controller 224 includes a harvesting ECU that controls the drive of the reaping device 3, a pre-travel ECU that controls the drive of the traveling unit called speed control of grain conveyance by the feed chain 6, and a traveling body 1. The threshing device 5 includes a post-travel ECU that controls the drive of the running part, such as stability control of the attitude, and control of the elevation of the discharge auger 8 and the opening and closing control of the chaff sieve of the oscillation sorting panel 57. It is provided with a pre-throbbing ECU that controls the drive and a post-throbbing ECU that controls the drive of the threshing device 5, including swing control of the discharge auger 8.

The combine controller 224 is electrically connected to each of the parking brake sensor 324, the auger clutch sensor 325, the reaping clutch sensor 326, the threshing clutch sensor 327, and the rice sensor 225. The parking brake sensor 324 detects the on/off state (whether or not it is in the braking state) of the parking brake pedal (not shown), which maintains and operates the left and right traveling crawlers 2, which are the traveling parts, in the braking state. The auger clutch sensor 325 detects the on-off state of the auger clutch for cutting off power connection to the grain discharge conveyor 8. The harvesting clutch sensor 326 detects the on-off state of the harvesting clutch for blocking power connection to the harvesting device 3. The reaping clutch sensor 326 detects the on-off state of the reaping clutch for blocking power connection to the threshing device 5. For example, the rice sensor 225 is composed of a plurality of sensors arranged at different height positions within the grain tank 7, and the combine controller 224, which detects the storage amount of grains within the grain tank 7, is an engine controller. It is electrically connected to (181). The engine controller 181, the urea water injection controller 182, the combine controller 224, and the display controller 351 are connected to each other to enable communication.

Next, display control of the liquid crystal monitor 212 will be explained with reference to FIGS. 26 and 27. As shown in FIG. 26, during normal operation control during harvesting work of a combine, information 360 during harvesting work is displayed on the liquid crystal monitor 212, and a speedometer indicating the traveling speed (vehicle speed) of the traveling body 1 ( 361), a load monitor 362 indicating the engine load, a urea water remaining amount meter 363 indicating the remaining amount of urea water in the urea water tank 174, a fuel remaining amount meter 364 indicating the remaining amount of fuel in the fuel tank 31, A sub-shift monitor 365 showing the setting state of the sub-shift lever 16, a reaping speed change monitor 366 showing the setting state of the drive speed in the reaping device 3, and a grain storage amount in the grain tank 7. A grain tank monitor 367, a rapid loss monitor 368 that monitors the loss from the barrel 56, an oscillation loss monitor 369 that monitors the loss from the oscillation sorting panel 57, and a flow rate of the crop being harvested. A harvest flow rate monitor 370, a crop moisture monitor 371 that indicates the moisture of the crop being harvested, and a headlight lighting indicator 372 that is displayed or not displayed depending on whether the headlight is turned on or off are displayed. The urea remaining amount meter 363 and the fuel remaining amount meter 364 are displayed adjacent to the left side of the liquid crystal monitor 212 (the side of the liquid crystal monitor 212 on the left side of the page in FIG. 26). Additionally, the grain tank monitor 367 is displayed near the right side of the liquid crystal monitor 212.

In addition, the urea water remaining amount indicator 363 displays a urea water remaining amount display 363a (reducing agent remaining amount display) according to the urea water remaining amount. The display area of the urea water remaining amount display 363a is, for example, approximately rectangular, and increases or decreases in the vertical direction of the liquid crystal monitor 212 (the vertical direction of the page in FIG. 26) according to the urea water remaining amount. Likewise, the fuel remaining amount indicator 364 displays a fuel remaining amount display 364a whose display area increases and decreases in the vertical direction according to the remaining fuel amount. In addition, the grain tank monitor 367 displays a grain storage amount display 367a according to the grain storage amount. The display area of the grain storage amount display 367a is divided into four in the vertical direction, for example, and increases or decreases in the vertical direction according to the grain storage amount. The urea water remaining amount display 363a (e.g., a blue color), the fuel remaining amount display 364a (e.g., a white color), and the grain storage amount display 367a (e.g., an orange or red color) color) are displayed in different colors.

On the liquid crystal monitor 212, an urea count mark 363b adjacent to the urea count remaining meter 363 is displayed. Additionally, a fuel mark 364b is displayed adjacent to the fuel remaining meter 364. The urea water mark 363b and the fuel mark 364b have different shapes. For example, the urea water mark 363b is displayed at the upper position of the urea water remaining amount meter 363, and the fuel mark 364b is displayed at the information position of the fuel remaining amount meter 364.

In addition, the length in the increase/decrease direction of the display area of the urea count remaining amount display 363a displayed by the urea count meter 363 on the liquid crystal monitor 212 (up and down direction in Fig. 26) is the maximum display area of the urea count remaining amount display 363a. When the increase/decrease direction length is, for example, 10% or less, the urea count warning lamp 363c (alarm light display) lights up at a position near the top of the urea count remaining amount meter 363 with the urea count mark 363b in between. do. Similarly, when the increase/decrease direction length of the display area of the remaining fuel amount display 364a is, for example, 10% or less of the increase/decrease direction length of the maximum display area, the fuel remaining amount indicator 364 is displayed with the fuel mark 364b in between. The fuel warning lamp 364c (warning lamp display) lights up and displays at a position near the top. The urea warning lamp 363c (for example, a red color) and the fuel warning lamp 364c (for example, an orange color) are displayed in different colors. 26, the increase/decrease direction lengths of the display areas of the element number remaining amount display 363a and the fuel remaining amount display 364a are each greater than 10% with respect to the increase/decrease direction length of the maximum display area. However, for convenience, the number of elements A warning lamp 363c and a fuel warning lamp 364c are shown.

Next, as shown in FIG. 26, during normal operation control during non-reaping work of the combine, the load monitor is displayed as non-operation information 380 on the liquid crystal monitor 212 and as information 360 during reaping work. (362), the sudden loss monitor (368), the oscillation loss monitor (369), and the harvesting flow rate monitor (370) are changed to change the lighting (flashing) state of the tachometer 381 indicating the rotation speed of the engine 14 and the direction indicator. A turn signal indicator 382 is displayed. Other displays in the non-working information 380 are the same as those in the reaping operation information 360. The rotation meter 381 is displayed near the upper center of the liquid crystal monitor 212. The turn signal display 382 is displayed near the upper left corner and the upper right corner of the liquid crystal monitor 212, respectively.

As shown in FIGS. 26 and 27 , on the liquid crystal monitor 212, the urea water remaining amount display 363a and the fuel remaining amount display 364a, which are decreasing due to use of the combine, are displayed adjacent to each other. Accordingly, the operator can check the remaining amounts of both fuel and urea water almost without moving his eyes. Therefore, the operator's visibility is improved compared to the case where these remaining amount indications are displayed at a distant location. In addition, since the urea remaining amount display 363a and the fuel remaining amount display 364a are displayed in different colors, the operator can easily distinguish between the urea remaining amount display 363a and the fuel remaining amount display 364a and the remaining fuel amount display 364a. It can prevent misidentification of the remaining amount of urea and urea.

In addition, the grain storage amount display 367a according to the grain storage amount in the grain tank 7 is located at the display position of the urea water remaining amount display 363a and the fuel remaining amount display 364a across the center of the display monitor 212 (display monitor It is displayed at a position on the opposite side (near the left side of display monitor 212) (near the right side of display monitor 212). In this way, since the remaining amounts of urea and fuel (363a, 364a) and the grain storage amount display (367a) are displayed at positions spaced apart from each other, the operator can keep in mind that the remaining amounts of fuel and reducing agent decrease and increase due to use of the combine. By dividing the storage amount of fine grains into judgment, the phenomenon can be identified instantly. Therefore, the operator's visibility and identification improve compared to the case where the urea water and fuel remaining amount displays 363a, 364a and the grain storage amount display 367a are displayed at close positions on the display monitor 212. In addition, misidentification of the urea water remaining amount display 363a, the fuel remaining amount display 364a, and the grain storage amount display 367a by the operator is prevented. In addition, since the urea water remaining amount display 363a, the fuel remaining amount display 364a, and the grain storage amount display 367a are displayed in different colors, the operator's visibility and identification are further improved.

Additionally, in the display monitor 212, the urea water mark 363b displayed adjacent to the urea water remaining meter 363 and the fuel mark 364b displayed adjacent to the fuel remaining meter 364 have different shapes. Therefore, the operator can easily identify the urea water remaining amount indicator 363 (urea remaining amount display 363a) and the fuel remaining amount meter 364 (fuel remaining amount display 364a). As a result, the operator's visibility and identification of the remaining amount of urea water and remaining fuel can be improved.

Additionally, on the display monitor 212, the urea water warning lamp 363c is displayed above the urea water remaining amount display 363a, and the fuel warning lamp 364c is displayed above the fuel remaining amount display 364a. Since it is displayed, there is no need to separately install warning lights for the remaining fuel amount and reducing agent remaining amount, which is effective in reducing manufacturing costs and in terms of layout space. In addition, the urea water warning lamp 363c and the fuel warning lamp 364c, which are displayed in different colors at the upper positions of the urea water remaining amount meter 363 and the fuel remaining amount meter 364, are used to provide warning of the urea water remaining amount and fuel by the operator. The identification of the remaining amount warning can be improved and misidentification of the remaining fuel amount and urea solution amount can be prevented.

Next, with reference to FIGS. 28 and 29 , modified examples of the display screens of the information 360 during harvesting work and the information 380 during non-reaping work will be described. As shown in Figures 28 and 29, the maximum display areas of the urea water remaining amount display 363a and the fuel remaining amount display 364a are each triangle. The display areas of the remaining amount displays 363a and 364a are, for example, a right triangle, one of the two acute angles is disposed on the downward side (in the decreasing direction among the increase and decrease directions), and the other acute angle and right angle are disposed on the upper side ( It is placed in the increasing direction among the increasing and decreasing directions. The downward acute angle (acute angle on one side) is smaller than the acute angle on the upper side (acute angle on the other side). That is, the length of the adjacent side between a right angle and a downward acute angle is longer than the length of the adjacent side between a right angle and an upper acute angle. The adjacent edge between the right angle and the downward acute angle is arranged along the increase/decrease direction (up/down direction) of the remaining capacity indicators 363a and 364a. The display positions of the urea remaining amount display 363a and the fuel remaining amount display 364a are arranged so that adjacent edges between a right angle and a downward acute angle face each other.

In addition, a large remaining amount mark 385 and a small remaining amount mark 386 are disposed between the urea water remaining amount meter 363 and the fuel remaining amount meter 364. The remaining amount mark 385 is arranged near the right angle (top) of the maximum display area of the remaining amount displays 363a and 364a. The small remaining amount mark 385 is arranged in the vicinity of the lower acute angle (bottom) of the maximum display area of the remaining amount displays 363a and 364a. The maximum display areas of the remaining amount displays 363a and 364a are respectively right-angled triangles where the downward acute angle is smaller than the upper acute angle. Therefore, compared to the case where the maximum display area is a rectangle, the display dimensions in the left and right directions (direction perpendicular to the increase/decrease direction) are Even if it is the same, the display area of the remaining amount displays 363a and 364a can be reduced while ensuring the operator's visibility. In particular, space where other images can be displayed can be secured near the acute angles on the lower sides of the remaining power displays 363a and 364a. By this, for example, display space for the high remaining amount mark 385 and the low remaining amount mark 386 on the liquid crystal monitor 212 can be secured. Additionally, the display position of the load monitor 362 can be moved closer to the left, or the display size of the load monitor 362 can be increased.

The combine of this embodiment notifies the operator that the urea water tank 174 has expired when supplying the urea water solution to the urea water tank 174 by executing control based on the flow shown in FIG. 30 . As shown in FIG. 30, when the key switch (not shown) is operated and power is supplied to each controller 181, 182, 224, and 351, the liquid level sensor (remaining amount sensor) of the urea solution tank 174 If an increase in the amount of urea is confirmed by a signal from (184), it is determined that the amount of urea has been supplied. Then, based on the signal from the liquid level sensor 184, the remaining amount of urea solution in the urea solution tank 174 is recognized, and the remaining amount of urea solution exceeds a first predetermined amount (for example, 80% of the tank capacity). In this case, it is determined that the urea tank 174 has expired. If it is determined that the urea water tank 174 has expired, a full water warning is notified to the operator. As this water full warning, for example, by issuing the warning buzzer 328 or flashing the brake light 329 (see Fig. 15) near the installation position of the urea water tank 174, the urea water tank is alerted to the operator during water supply work. It can be announced that (174) has reached its full number.

The combine of this embodiment notifies the operator that the remaining amount of urea water in the urea water tank 174 is small by executing control based on the flow shown in FIG. 31. As shown in FIG. 31, when the key switch (not shown) is operated and power is supplied to each controller 181, 182, 224, and 351, the liquid level sensor (remaining amount sensor) of the urea solution tank 174 The remaining amount of urea solution in the urea solution tank 174 is confirmed by a signal from 184. If the remaining amount of urea water can be detected and the remaining amount of urea water is less than a second predetermined amount (e.g., 10%), an alarm of remaining amount of urea water is issued to report that the remaining amount of urea water is low. At this time, the urea water warning lamp 363c lights up on the liquid crystal monitor 212, and a display promoting the supply of urea water is displayed in the center of the liquid crystal monitor 212.

In addition, when detection of the remaining amount of urea water is impossible and urea water can be supplied to the urea water injection valve 178 by the urea water supply device 175, the reaping operation, threshing operation, grain discharge operation, etc. are stopped. A first work limit alarm that promotes is displayed in the center of the liquid crystal monitor 211. Then, when it is confirmed that each work machine clutch is cut based on signals from each work clutch sensor 325 to 327, the output of the diesel engine 14 is lowered, such as by reducing the fuel injection amount to the diesel engine 14. I order it.

In addition, when it is impossible to supply urea water to the urea water injection valve 178 by the urea water supply device 175, a second device is installed to promote stopping of reaping work, threshing work, grain discharge work, etc., and parking of the combine. A work restriction warning is displayed in the center of the liquid crystal monitor (211). Then, when it is confirmed that the combine is in the parking lot after each work machine clutch is cut based on signals from the parking brake sensor 324 and each work clutch sensor 325 to 327, the diesel engine 14 is set to low idle. ) Operate at the number of revolutions.

Meanwhile, the configuration of each part in the present invention is not limited to the illustrated embodiment, and various changes are possible without departing from the spirit of the present invention.

1: Running body 5: Threshing device
7: Grain tank 8a: Vertical pull-out conveyor (support member)
14: engine 31: fuel tank
74: Exhaust gas purification device 174: Urea tank (reducing agent tank)
179: Urea water supply pipe (reducing agent piping) 180: Urea water return pipe (reducing agent piping)
211: display device (display unit) 212: liquid crystal monitor (display screen)
254: concave portion 254a: bottom of the concave portion
363a: Displays remaining amount of urea (displays remaining amount of reducing agent)
364a: Fuel level display

Claims (4)

An engine that is a power source mounted on the running body, an exhaust gas purification device that removes nitrogen oxide substances in the exhaust gas of the engine, a reducing agent tank that accommodates a reducing agent supplied to the exhaust gas purifying device, and a device for carrying in harvested grain. In a combine equipped with a grain tank,
A combine characterized in that a coolant transfer pipe and a coolant return pipe in the engine are connected to the reducing agent tank. According to claim 1,
A combine, characterized in that the reducing agent tank is formed on the rear side of the grain tank. The method of claim 1 or 2,
The grain tank is rotatably formed on the outside of the traveling body using a support member formed on the rear side of the traveling body as a pivot point,
The combine is characterized in that the reducing agent tank is arranged near the supporting member. According to claim 3,
The combine wherein the coolant transfer pipe and the coolant return pipe are arranged from the reducing agent tank to a center side of the traveling body rather than the support member.