combine

Abstract

To provide a combine that allows a space of its machine body to be used effectively, allows an exhaust gas purification device to be installed compactly, and allows excellent weight balance to be achieved.SOLUTION: A combine in which an engine 11 is arranged in the front part of a travelling machine body includes an exhaust gas purification device 30 having a DPF case 31 for removing particulate substances in exhaust gas of the engine 11, and an SCR case 32 for removing nitrogen oxide substances in the exhaust gas of the engine 11. The DPF case 31 and the SCR case 32 are arranged above the engine 11 in the state of vertically arranged in the direction with the longitudinal direction as the back and forth direction.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a combine equipped with an exhaust gas purification device for purifying exhaust gas from an engine.

Background Art

[0002] Conventionally, there is a combine equipped with an exhaust gas purification device for purifying exhaust gas from an engine. As the exhaust gas purification device, for example, there is a configuration having a DPF case as a diesel particulate filter (DPF) and an SCR case forming a selective catalytic reduction (SCR) system using urea, and introducing exhaust gas from a diesel engine into these cases for purification. The DPF case and the SCR case are configured as substantially cylindrical cases of approximately the same size.

[0003] Regarding such an exhaust gas purification device, Patent Document 1 discloses a configuration in which the DPF case and the SCR case are arranged side by side horizontally with the longitudinal direction (cylindrical axis direction) in the front-rear direction of the machine body. In Patent Document 1, the DPF case and the SCR case are arranged in a recess formed outside a grain tank for storing harvested grains.

[0004] Further, Patent Document 2 discloses a configuration in which an engine is arranged at the rear of the machine body and a threshing device is provided on the left side of the machine body, and the DPF case and the SCR case are arranged vertically between the engine and the threshing device with the longitudinal direction in the front-rear direction of the machine body.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

[0006] While the configuration disclosed in Patent Document 1 allows for compact installation of the DPF case and SCR case, it necessitates the creation of a recess in the grain tank, which presents a problem in that it becomes difficult to secure sufficient tank volume, affecting the amount of grain that can be stored in the tank.

[0007] Furthermore, according to the configuration disclosed in Patent Document 2, the heavy engine and exhaust gas purification device are concentrated at the rear of the aircraft, which presents a disadvantage in terms of the aircraft's weight balance.

[0008] This invention has been made in view of the above-mentioned problems, and aims to provide a combine harvester that can effectively utilize the space of the machine, install an exhaust gas purification device compactly, and achieve excellent weight balance. [Means for solving the problem]

[0009] The combine harvester according to the present invention is a combine harvester in which the engine is located at the front of the traveling body, and is equipped with an exhaust gas purification device having a first case for removing particulate matter from the exhaust gas of the engine and a second case for removing nitrogen oxides from the exhaust gas of the engine, wherein the first case and the second case are arranged vertically in a direction with their longitudinal direction as the front-rear direction, and are located above the engine.

[0010] Another embodiment of the present invention provides a combine harvester that includes an exhaust pipe for discharging exhaust gas from the engine, wherein the exhaust pipe extends upward from the engine and is connected to the first case.

[0011] In another aspect of the present invention, a combine harvester is characterized in that at least a portion of the exhaust pipe is made of a flexible pipe.

[0012] In another aspect of the present invention, the combine harvester is positioned such that at least one of the first case and the second case overlaps, in a top view, with at least a portion of it, with respect to the threshing section located on the traveling machine body. [Effects of the Invention]

[0013] According to the present invention, the space within the aircraft can be used effectively, the exhaust gas purification device can be installed compactly, and an excellent weight balance can be obtained. [Brief explanation of the drawing]

[0014] [Figure 1] This is a left side view of a combine harvester according to one embodiment of the present invention. [Figure 2] This is a right side view of a combine harvester according to one embodiment of the present invention. [Figure 3] This is a plan view of a combine harvester according to one embodiment of the present invention. [Figure 4] This is a right side view showing the cabin and outside air intake cover according to one embodiment of the present invention. [Figure 5] This is a right rear perspective view showing the configuration of a device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 6] This is a left rear perspective view showing the configuration of a device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 7] This is a left front perspective view showing the configuration of a device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 8] This is a right side view showing the configuration of the device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 9] This is a left side view showing the configuration of the device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 10] This is a rear view showing the configuration of the device mounted on the front of a mobile body according to one embodiment of the present invention. [Figure 11]It is a rear perspective view showing the configuration of a support frame and a connecting frame according to an embodiment of the present invention. [Figure 12] It is a rear perspective view showing a case unit according to an embodiment of the present invention. [Figure 13] It is a front perspective view showing a case unit according to an embodiment of the present invention. [Figure 14] It is a diagram showing a supply configuration of urea water to an exhaust gas purification device according to an embodiment of the present invention. [Figure 15] It is a rear perspective view showing a support configuration of a case unit according to an embodiment of the present invention. [Figure 16] It is a rear view showing a support configuration of a case unit according to an embodiment of the present invention. [Figure 17] It is a rear cross-sectional view showing a support configuration of a case unit according to an embodiment of the present invention. [Figure 18] It is a rear cross-sectional view showing a support configuration of a urea water supply device and a urea injection controller according to an embodiment of the present invention. [Figure 19] It is a perspective view showing the configuration of a lock device for a grain tank according to an embodiment of the present invention. [Figure 20] It is a front view showing the configuration of a lock device for a grain tank according to an embodiment of the present invention. [Figure 21] It is a left side view showing a support configuration of an intercooler according to an embodiment of the present invention. [Figure 22] It is a partially enlarged perspective view showing a support configuration of an intercooler according to an embodiment of the present invention. [Figure 23] It is a diagram showing the configuration of a fan of an intercooler according to an embodiment of the present invention. [Figure 24] It is a perspective view showing a support configuration of an intake pipe according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0015] The present invention relates to a combine harvester equipped with an exhaust gas purification device for purifying exhaust gases from the engine. By devising the arrangement of the first and second cases of the exhaust gas purification device, the invention aims to effectively utilize the space of the machine, enable a compact installation configuration of the exhaust gas purification device, and obtain a configuration that is advantageous in terms of the weight balance of the machine. Embodiments of the present invention will be described below with reference to the drawings.

[0016] First, the overall configuration of the combine harvester 1 according to this embodiment will be described using Figures 1 to 4. In the following description, the left and right sides of the combine harvester 1, when viewed from the front, will be referred to as the left and right sides of the combine harvester 1, respectively.

[0017] As shown in Figures 1 to 3, the combine harvester 1 comprises a running unit 2 configured as a crawler-type running device having a pair of left and right crawler sections 3, 3, and a running body 4 supported by the running unit 2. The combine harvester 1 also comprises a harvesting unit 5, a threshing unit 6, a grain tank 7, a sorting unit 8, a discharge auger 9, and a straw discharge processing unit 10.

[0018] Each crawler section 3 constituting the running section 2 has a track frame 3a extending in the front-rear direction below the running body 4, various rotating bodies supported by the track frame 3a, and tracks 3b wound around these rotating bodies. The crawler section 3 includes a drive sprocket 3c supported at the front end of the track frame 3a as a rotating body supported by the track frame 3a. The crawler section 3 is driven by the drive sprocket 3c, which receives power transmission from the engine 11, a drive source mounted on the running body 4.

[0019] The harvesting unit 5 is a device for harvesting and collecting grain stalks in a field, and is located at the front of the traveling machine body 4. The harvesting unit 5 is located at the front of the traveling machine body 4 and extends over approximately the entire width of the combine harvester 1. The harvesting unit 5 is mounted on the traveling machine body 4 so as to be rotatable around a predetermined axis via a hydraulic cylinder for lifting and lowering, and its height can be adjusted by the rotational movement caused by the extension and retraction of the hydraulic cylinder.

[0020] The harvesting unit 5 has a harvesting support frame 5a as a harvesting frame, and the grass divider 5b, lifting device 5c, cutting blade device 5e, and grain stalk conveying device 5f are supported on this harvesting support frame 5a. The harvesting unit 5 divides the grain stalks in the field with the grass divider 5b, lifts the divided grain stalks with the lifting device 5c, and then cuts the lifted grain stalks by the cutting blade device 5e while conveying them to the rear with the grain stalk conveying device 5f. Each device of the harvesting unit 5 is operated by power transmitted from the engine 11 of the combine harvester 1.

[0021] On the traveling machine body 4, a threshing unit 6 for threshing the stalks of grain cut by the harvesting unit 5 and a grain tank 7 for storing the grain removed from the threshing unit 6 are arranged side by side. The threshing unit 6 is located on the left side of the machine body, and the grain tank 7 is located on the right side of the machine body.

[0022] The threshing unit 6 comprises a threshing cylinder 6a and a processing cylinder (not shown) with the front-to-back direction as the axis of rotation, and a stalk supply device provided to the left of the threshing cylinder 6a. The stalk supply device grips the base of the stalk and transports the stalk backward in a horizontal position with the ear facing the threshing cylinder 6a. The stalk supply device comprises a feed chain wound around a plurality of sprockets with the left-to-right direction as the axis of rotation, and a stalk supply clamping body (not shown) that cooperates with the feed chain to grip the base of the stalk.

[0023] Below the threshing unit 6 on the traveling machine body 4, a sorting unit 8 is provided for sorting the threshed material processed by the threshing unit 6. The sorting unit 8 includes an oscillating sorting device 8a, an air sorting device (not shown), and a grain conveying device. The sorting unit 8 uses the oscillating sorting device 8a to sort the material that has fallen from the threshing unit 6, and then uses the air sorting device to air sort the material after the oscillating sorting. Of the material that has been air sorted, the sorting unit 8 uses the grain conveying device to transport the grain to the right towards the grain tank 7, and uses the air sorting device to blow away straw and dust to the rear and discharge them outside the machine. The grain transported towards the grain tank 7 by the grain conveying device is stored in the grain tank 7.

[0024] On the right rear end of the traveling machine body 4, a discharge auger 9, which serves as a grain discharge device for discharging grain from the grain tank 7 to the outside, is rotatably mounted via a vertical take-off conveyor 9b located on the right rear side of the traveling machine body 4. The grain stored in the grain tank 7 is transported by the discharge auger 9, which has a screw conveyor built inside, and discharged from a discharge port 9a located at the tip of the discharge auger 9. The grain discharged from the discharge port 9a is loaded into the bed of a truck, a container, etc.

[0025] Meanwhile, on the traveling machine body 4, a straw processing unit 10 is provided behind the threshing unit 6 for processing the straw waste after threshing by the threshing unit 6. The straw processing unit 10 includes a straw conveying device 10a and a straw cutting device 10b. The straw conveying device 10a conveys the threshed grain stalks (waste stalks) to the rear and discharges them outside the machine body, or conveys them to the straw cutting device 10b. The straw cutting device 10b cuts the waste stalks conveyed from the straw conveying device 10a and discharges them outside the machine body.

[0026] Furthermore, on the traveling machine body 4, to the right of the harvesting unit 5 and in front of the grain tank 7, there is an operating unit 12 covered by a cabin 20. In other words, the operating unit 12 is located above the front of the traveling machine body 4. The operating unit 12 is located inside the cabin 20. As shown in Figure 4, a steering wheel 18 is provided at the front of the operating unit 12, and a driver's seat 19 is provided behind the steering wheel 18. Also, to the left of the driver's seat 19, there is a side control unit on the side column 23, which contains various operating tools such as a main gear lever 21 and an auxiliary gear lever 22.

[0027] Below and to the rear of the driver's compartment 12 is a prime mover unit, including an engine 11, which is installed in the engine room 13. The power from the engine 11 is transmitted via a transmission and the like to various devices in each part of the combine harvester 1, such as the driving unit 2, harvesting unit 5, threshing unit 6, sorting unit 8, discharge auger 9, and straw processing unit 10. The engine 11 is a diesel engine.

[0028] Within the engine compartment 13, a radiator 14 is located to the right of the engine 11 (see Figure 3). The radiator 14 is installed in the middle of the coolant circulation path of the engine 11 and cools the coolant sent from the engine 11 through heat exchange with the outside air. The coolant cooled by the radiator 14 is returned to the engine 11. The radiator 14 has a rectangular plate-like outer shape and is erected with its thickness oriented in the left-right direction.

[0029] Furthermore, as shown in Figures 2 and 4, an outside air intake cover 15 is provided on the right side of the engine 11, acting as an engine cover that covers the right side of the engine compartment 13. The radiator 14 is located inside the outside air intake cover 15. In other words, the radiator 14 is positioned between the engine 11 and the outside air intake cover 15. The outside air taken in through the outside air intake cover 15 is used for heat exchange in the radiator 14.

[0030] The outside air intake cover 15 is located on the right side of the combine harvester 1, between the cabin 20 and the grain tank 7. The outside air intake cover 15 is positioned flush with the right side surface of the grain tank 7.

[0031] The rear edge of the outside air intake cover 15 is formed in a straight line so as to follow the vertical direction when viewed from the side. The outside air intake cover 15 is supported by a support column (not shown) erected on the traveling body 4 along its rear edge, via a hinge (not shown), so as to be rotatable in the vertical direction as the pivot axis. The outside air intake cover 15 is provided so as to be able to open and close from the front by a rear pivot support portion on the support column.

[0032] When the outside air intake cover 15 is closed, the right side of the engine 11 and radiator 14, which is the outside of the engine compartment, is covered by the outside air intake cover 15, and the engine compartment 13 is closed from the right side. When the outside air intake cover 15 is opened, the right side of the engine compartment 13 becomes open.

[0033] The outside air intake cover 15 is provided with a rotary screen 16. The rotary screen 16 is configured to draw outside air into the engine compartment 13 as cooling air for the engine 11. The rotary screen 16 is rotatably supported by a rotating support located at the center of a circular opening 16a formed in the outside air intake cover 15, and is configured to rotate by the drive of a motor (not shown).

[0034] The rotary screen 16 has a configuration in which a mesh-like dustproof screen 16b is stretched over a circular opening 16a. The dustproof screen 16b collects dust, dirt, straw, etc., and prevents dust, etc. from entering the engine room 13 along with the outside air. The dust, etc. collected by the dustproof screen 16b is removed by a suction device 17 provided on the outside of the rotary screen 16. The suction device 17 is configured to suck up the dust, etc. attached to the dustproof screen 16b and discharge it outside the machine.

[0035] Furthermore, an upper cover portion 24 is provided on the upper side of the outside air intake cover 15. The upper cover portion 24 is a plate-shaped cover portion and is provided so as to form a flush right side surface with the outside air intake cover 15. The upper cover portion 24 is provided in a state where it is fixed to a predetermined frame portion or the like.

[0036] The combine harvester 1, having the above configuration, has an engine 11 located at the front of the traveling body 4, and a threshing unit 6 and a grain tank 7 arranged side by side on the traveling body 4.

[0037] The running machine body 4 has a machine base section 25 that is horizontally constructed on the track frame 3a by frame members, plate-like members, etc., arranged in the longitudinal or lateral direction (see Figure 8). In the longitudinal direction, the rear side of the machine base section 25 extends rearward from the rear end of the crawler section 3.

[0038] The engine 11, threshing unit 6, and grain tank 7 are mounted on the machine base 25. The engine 11 is mounted on the front right side of the machine base 25, with the axial direction of the output shaft oriented left to right. In other words, the engine 11 is located on the front right side of the running machine body 4. The threshing unit 6 and grain tank 7 are located on the machine base 25 behind the engine 11. A transmission case 26 is positioned between the left and right crawler units 3 at the front of the machine base 25. Power from the engine 11 is transmitted to the left and right crawler units 3 via the transmission case 26.

[0039] As shown in Figures 5 to 11, the combine harvester 1 is equipped with an exhaust gas purification device 30 for purifying the exhaust gas from the engine 11. The exhaust gas purification device 30 has a DPF case 31 as a first case and an SCR case 32 as a second case. Exhaust gas from the engine 11 is introduced into these cases, and the exhaust gas is purified by removing particulate matter such as soot and nitrogen oxides (NOx) contained in the exhaust gas.

[0040] The DPF case 31 is a diesel particulate filter case that removes particulate matter from the exhaust gas of the engine 11. The SCR case 32 is a case that forms a selective catalytic reduction (SCR) system using urea and removes nitrogen oxides from the exhaust gas of the engine 11.

[0041] The DPF case 31 has a diesel oxidation catalyst and a soot filter installed inside the case. The diesel oxidation catalyst is an oxidation catalyst such as platinum that generates nitrogen dioxide (NO2). The soot filter is a honeycomb structure filter that continuously oxidizes and removes collected particulate matter at a relatively low temperature. Inside the DPF case 31, the diesel oxidation catalyst and the soot filter are arranged in series with respect to the exhaust gas flow, with the diesel oxidation catalyst on the upstream side and the soot filter on the downstream side. The diesel oxidation catalyst and soot filter remove particulate matter, mainly black smoke, from the exhaust gas of the engine 11 passing through the DPF case 31, and also reduce carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas.

[0042] The SCR case 32 contains an SCR catalyst and an oxidation catalyst located within the case. The SCR catalyst is a catalyst for selective catalytic reduction of urea. Within the case of the SCR case 32, the SCR catalyst and the oxidation catalyst are arranged in series with respect to the exhaust gas flow, with the SCR catalyst on the upstream side and the oxidation catalyst on the downstream side. The SCR catalyst and oxidation catalyst reduce nitrogen oxides (NOx) in the exhaust gas passing through the SCR case 32.

[0043] Both the DPF case 31 and the SCR case 32 are constructed as roughly cylindrical cases and are of roughly the same size. In each of the DPF case 31 and the SCR case 32, the longitudinal direction (axis direction of the cylinder) of the roughly cylindrical outer shape is the direction of exhaust gas flow within the case.

[0044] In the exhaust gas purification device 30, the DPF case 31 and the SCR case 32 are arranged vertically, with the DPF case 31 on the bottom and the SCR case 32 on the top. The SCR case 32 is located directly above the DPF case 31, and the DPF case 31 and the SCR case 32 are arranged so that their central axes in their substantially cylindrical outer shapes are on a common vertical plane. The vertical distance between the DPF case 31 and the SCR case 32 is smaller than the outer diameter of either case.

[0045] The DPF case 31 and SCR case 32 are arranged with their longitudinal direction in a substantially cylindrical shape oriented in the front-to-back direction. The DPF case 31 and SCR case 32 have substantially the same length and their positions in the front-to-back direction are substantially the same.

[0046] The exhaust gas purification device 30 is located above the engine 11, which is positioned at the front of the vehicle body 4. More specifically, the exhaust gas purification device 30 is located in the following positions.

[0047] In the vertical direction, the exhaust gas purification device 30 is installed so that the DPF case 31 and SCR case 32 are positioned above the main body of the engine 11 (see Figure 10). The vertical position of the exhaust gas purification device 30 is above the threshing section 6 and below the horizontal discharge auger 9 (see Figure 1).

[0048] Furthermore, in the longitudinal direction, the exhaust gas purification device 30 is installed such that the front ends of the DPF case 31 and SCR case 32 are positioned above the rear end of the main body of the engine 11 (see Figure 9). The position of the exhaust gas purification device 30 in the longitudinal direction is directly behind the rear wall portion 20a of the cabin 20 (see Figures 1 and 2).

[0049] Furthermore, in the left-right direction, the exhaust gas purification device 30 is positioned so that the DPF case 31 and SCR case 32 are located above the left end of the engine 11 (see Figure 10). The position of the exhaust gas purification device 30 in the left-right direction is approximately in the center of the traveling body 4, and is located between the threshing unit 6 and the grain tank 7 (see Figure 3).

[0050] Furthermore, the exhaust gas purification device 30 is located below the roof portion 20b of the cabin 20 and is positioned on the left rear side of the cabin 20 (see Figures 1 and 3). In particular, in this embodiment, the rear wall portion 20a of the cabin 20 is a surface that slopes backward, and the rear end of the roof portion 20b of the cabin 20 protrudes to the rear. In a top view, the right front portion of the exhaust gas purification device 30 is covered by the left rear corner of the roof portion 20b (see Figure 3).

[0051] With the exhaust gas purification device 30 arranged as described above, the DPF case 31 and SCR case 32 are positioned vertically side by side with their longitudinal direction as the front-to-back direction, behind the driver's unit 12 located above the engine 11, and on the right side, which is the inner left and right side of the threshing unit 6.

[0052] The piping configuration of the exhaust gas purification device 30 and the configuration of the devices connected to the exhaust gas purification device 30 will be described.

[0053] In engine 11, a supercharger 40 is provided in the exhaust manifold, which constitutes the exhaust gas outlet (see Figure 7). The supercharger 40 has an exhaust turbine and a compressor that are driven coaxially with each other, and forcibly supplies air to engine 11. One end (upstream side) of the exhaust pipe 41, which discharges exhaust gas from engine 11, is connected to the exhaust gas outlet side of the supercharger 40.

[0054] The other end (downstream side) of the exhaust pipe 41 is connected to the DPF case 31 of the exhaust gas purification device 30. The DPF case 31 has an exhaust gas inlet 31a protruding downwards on the lower front side, and the downstream side of the exhaust pipe 41 is connected to the exhaust gas inlet 31a. The exhaust gas from the engine 11 is introduced into the DPF case 31 through the exhaust pipe 41.

[0055] The supercharger 40 is located on the front upper side of the engine 11, with the left side serving as the exhaust gas outlet. The exhaust pipe 41 extends diagonally upward and rearward from the left side of the supercharger 40 and is connected to the lower front end of the DPF case 31.

[0056] The exhaust pipe 41 includes an exhaust connecting pipe 41a connected to the exhaust gas outlet side of the supercharger 40, a DPF inlet pipe 41b connected to the exhaust gas inlet 31a of the DPF case 31, and a flexible pipe 41c interposed between the exhaust connecting pipe 41a and the DPF inlet pipe 41b to connect these pipes. The flexible pipe 41c is constructed in a bellows shape to allow bending and expansion, absorbing vibrations from the engine 11 and preventing vibrations from the engine 11 from being transmitted from the exhaust connecting pipe 41a to the DPF inlet pipe 41b. Both the exhaust connecting pipe 41a and the DPF inlet pipe 41b are made of cast metal.

[0057] In the DPF case 31, a DPF outlet pipe 42 extends from the rear surface portion 31b of the roughly cylindrical outer shape, discharging exhaust gas from within the DPF case 31. The DPF outlet pipe 42 is arranged in a folded manner, extending upward and to the left from the center of the rear surface portion 31b of the DPF case 31, and then turning towards the front. In a view of the DPF case 31 in the central axis direction (rear view), the DPF outlet pipe 42 extends upward and to the left from the center of the rear surface portion 31b at an inclination angle of approximately 50 to 55° with respect to the vertical direction.

[0058] On the other hand, the SCR case 32 has an exhaust gas inlet 32a protruding downward to the left on the lower left side of its front, and the downstream side of the SCR inlet pipe 43 is connected to the exhaust gas inlet 32a. The SCR inlet pipe 43 is an elbow-shaped pipe positioned to extend from the exhaust gas inlet 32a toward the rear (see Figure 13). The SCR inlet pipe 43 is positioned at an inclination angle of approximately 40 to 45° with respect to the vertical from the exhaust gas inlet 32a when viewed in the central axis direction of the SCR case 32 (see Figure 17).

[0059] The downstream side of the DPF outlet pipe 42 and the upstream side of the SCR inlet pipe 43 are opposite each other in the front-to-back direction, and a urea mixing pipe 45 is provided between the DPF outlet pipe 42 and the SCR inlet pipe 43 to connect these pipes. The urea mixing pipe 45 is located in the upper left position of the DPF case 31 and in the lower left position of the SCR case 32, and is arranged along the front-to-back direction parallel to the central axis of these cases. As shown in Figure 17, in a rear view, the triangle formed by connecting the central axes C1 and C2 of the DPF case 31 and SCR case 32 with the central axis C3 of the urea mixing pipe 45 is an approximately isosceles triangle with the right side as the base.

[0060] In the configuration described above, the exhaust gas discharged from the rear of the DPF case 31 is redirected back to the front by the DPF outlet pipe 42, and then introduced into the SCR case 32 through the exhaust gas inlet 32a via the urea mixing pipe 45 and the SCR inlet pipe 43.

[0061] An SCR outlet pipe 46 for discharging exhaust gas from the SCR case 32 is provided at the rear of the SCR case 32. The rear of the SCR case 32 is a bowl-shaped reduced-diameter section 32b that gradually narrows in diameter from the front to the rear, and an outlet section 32c that protrudes cylindrically toward the rear is provided at the rear end of the reduced-diameter section 32b (see Figure 12). The outlet section 32c forms the outlet for exhaust gas from the SCR case 32.

[0062] The SCR outlet pipe 46 is provided with a cylindrical outlet portion 32c positioned inside one end (upstream side). The outlet portion 32c is open inside the SCR outlet pipe 46, and the internal space of the SCR case 32 and the SCR outlet pipe 46 are in communication. The outlet portion 32c is a smaller diameter portion than the pipe diameter of the SCR outlet pipe 46, and a gap exists around the entire circumference between the inner circumferential surface of the SCR outlet pipe 46 and the outer circumferential surface of the outlet portion 32c for drawing in outside air.

[0063] The SCR outlet pipe 46 has an elbow-shaped curve that extends towards the upper left when viewed from the rear and towards the rear left when viewed from above. A tailpipe 47, which together with the SCR outlet pipe 46 constitutes the exhaust pipe portion of the exhaust gas purification device 30, is attached to the other end (downstream side) of the SCR outlet pipe 46. The tailpipe 47 is provided in such a manner that it extends linearly from the SCR outlet pipe 46 diagonally upward and to the rear left. The tailpipe 47 has a diagonally cut opening shape at its tip.

[0064] A urea injection unit 48 is provided in the DPF outlet pipe 42. The urea injection unit 48 is provided in a cylindrical projection 42a of the DPF outlet pipe 42, which extends rearward from the portion between the curved upstream portion and the straight downstream portion of the DPF outlet pipe 42. The urea injection unit 48 is detachably attached to the DPF outlet pipe 42.

[0065] As described above, the exhaust gas purification device 30 has a urea mixing pipe 45 interposed between the DPF outlet pipe 42, which constitutes the exhaust outlet of the DPF case 31, and the SCR inlet pipe 43, which constitutes the exhaust inlet of the SCR case 32. The urea mixing pipe 45 is positioned on the threshing section 6 side relative to the DPF case 31 and the SCR case 32.

[0066] In other words, the DPF case 31 and SCR case 32 are positioned between the threshing unit 6 on the left and the grain tank 7 on the right in the left-right direction, and the urea mixing pipe 45 is positioned to the left of the DPF case 31 and SCR case 32, that is, on the threshing unit 6 side. In this embodiment, the urea mixing pipe 45 is located to the left of the DPF case 31 and SCR case 32, at a height midway between these cases.

[0067] Here, the configuration for supplying urea solution to the urea injection unit 48 will be explained using Figure 14. As shown in Figure 14, the exhaust gas purification device 30 has a urea solution supply device 50 for supplying urea solution to the urea mixing pipe 45.

[0068] The urea water supply device 50 supplies urea water (aqueous solution of urea for selective catalytic reduction) stored in the urea water tank 51 to the urea injection unit 48. The urea injection unit 48 is connected to the urea water supply device 50 by an injection pipe 52 and receives urea water from the injection pipe 52. The urea injection unit 48 has an injection valve 48a, and the urea water supplied from the injection pipe 52 by the urea water supply device 50 is sprayed into the urea mixing pipe 45 by the injection valve 48a.

[0069] Between the urea water supply device 50 and the urea water tank 51, there is a urea water supply pipe 53 for supplying urea water from the urea water tank 51 to the urea water supply device 50, and a urea water return pipe 54 for returning urea water from the urea water supply device 50 to the urea water tank 51. The urea water supply device 50 also has a pump 50a for pressurizing the urea water in the urea water tank 51, and an electric motor 50b for driving the pump 50a.

[0070] The operation of the urea water supply device 50 is controlled by the urea injection controller 55. The urea injection controller 55 is connected to the engine controller 56 of the combine harvester 1 and exchanges signals with the engine controller 56. The engine controller 56 controls the fuel injection of the engine 11, etc. The urea injection controller 55 is connected to the injection valve 48a of the urea injection unit 48 and the electric motor 50b of the urea water supply device 50, and controls the operation of the injection valve 48a and the urea water supply device 50.

[0071] Furthermore, the urea water tank 51 is equipped with a temperature sensor 51a for detecting the temperature of the urea water in the tank and a water volume sensor 51b for detecting the amount of urea water in the tank. The temperature sensor 51a and the water volume sensor 51b are connected to the urea injection controller 55, and the detection signals from each sensor are input to the urea injection controller 55.

[0072] With this configuration, urea solution is supplied to the urea mixing pipe 45 at the appropriate timing according to the operating status of the engine 11. The urea solution supplied to the urea mixing pipe 45 is mixed as ammonia into the exhaust gas discharged from the DPF case 31 and introduced into the SCR case 32.

[0073] In the exhaust gas purification device 30 having the above configuration, the exhaust gas from the engine 11 passes through the DPF case 31, where particulate matter contained in the exhaust gas is continuously oxidized and removed, and the content of carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas is reduced. The exhaust gas in the urea mixing pipe 45 discharged from the DPF case 31 is mixed with ammonia produced by hydrolysis when urea water is injected from the urea injection unit 48, and is introduced into the SCR case 32. The exhaust gas introduced into the SCR case 32 undergoes a reduction in the content of nitrogen oxides (NOx) by passing through the SCR case 32. The exhaust gas from the engine 11, purified in this manner by the DPF case 31 and SCR case 32, is discharged outside the machine via the SCR outlet pipe 46 and out of the tailpipe 47 diagonally upward and to the left rear.

[0074] The support configuration of the exhaust gas purification device 30 on the traveling machine body 4 will now be described. The exhaust gas purification device 30 is supported by predetermined support members on the machine base portion 25 of the traveling machine body 4. The combine harvester 1 includes, as a support configuration for the exhaust gas purification device 30 on the machine base portion 25 of the traveling machine body 4, a support frame 60 that supports the driver's unit 12 and a connecting frame 80 that connects the support frame 60 to the machine base portion 25 of the traveling machine body 4 (see Figure 11).

[0075] As shown in Figure 11, the support frame 60 and the connecting frame 80 are configured to surround the engine 11, which is installed at the front of the machine base 25, forming the engine room 13 (see Figure 3). A cooling fan 71 is provided on the right side of the engine 11, and a radiator 14 is installed to the right of the cooling fan 71 (see Figure 10). A shroud is provided on the left side of the radiator 14 to cover the cooling fan 71. When the cooling fan 71 rotates, cooling air is drawn into the engine room 13 from the rotary screen 16 of the outside air intake cover 15 located to the right of the radiator 14 (see Figures 3 and 4).

[0076] The support frame 60 comprises a horizontal frame 61 positioned horizontally above the front of the engine 11, a longitudinal extension frame 62 positioned longitudinally to the right of the engine 11 at approximately the same height as the horizontal frame 61, and three support columns: a front left support column 63, a front right support column 64, and a rear right support column 65. All of these frames and columns constituting the support frame 60 are formed from square steel pipes.

[0077] The front left support column 63 is provided on a support base 73 located to the left of the engine 11 on the machine base 25. The support base 73 has a configuration in which a horizontal support surface 73c is supported by support columns 73a and support bases 73b etc. erected on the machine base 25. The front left support column 63 is erected vertically on the support surface 73c with a support portion 63a provided by fixing a predetermined support fitting to the lower end of the front left support column 63 by welding, etc., and the support portion 63a is fixed to the support surface 73c with bolts, etc.

[0078] The front right support column 64 is located in front of the front left support column 63 in the front-rear direction and is positioned to the right front of the engine 11. The front right support column 64 is erected vertically on the engine base 25 with its lower end fixed to the engine base 25 by bolts or the like via a support plate portion 64a or the like provided at the lower end of the front right support column 64.

[0079] The rear right support column 65 is positioned approximately the same as the front right support column 64 in the left-right direction and is located behind the front right support column 64, and is provided at the right rear position of the engine 11. The rear right support column 65 is erected vertically on the engine base 25 with its lower end fixed to the engine base 25 by bolts or the like via a support plate portion 65a provided at the lower end of the rear right support column 65.

[0080] The front and rear extension frame 62 extends along the front-rear direction in a plan view and is supported on both the front and rear sides by a front right support column 64 and a rear right support column 65. The front right support column 64 supports the front end of the front and rear extension frame 62 from below. The rear right support column 65 supports the rear part of the front and rear extension frame 62 from below. The upper ends of the front right support column 64 and the rear right support column 65 are fixed to the front and rear extension frame 62 by welding or the like.

[0081] The rear right support column 65 supports the front of the front-rear extension frame 62 at a position forward of the rear end. Therefore, the front-rear extension frame 62 has a rearward extension portion 62a that extends rearward from the position supported by the rear right support column 65. Furthermore, the front-rear extension frame 62 has an inclined portion 62b at the front, which is gently sloped downwards relative to the horizontal rear portion, and the front right support column 64, which supports the front end of the inclined portion 62b, is shorter in height than the rear right support column 65.

[0082] The horizontal frame 61 is horizontally installed between the front left support column 63 and the front and rear extension frame 62. The left end of the horizontal frame 61 is fixed to the front of the upper and lower intermediate section of the front left support column 63 by welding or the like. The right end of the horizontal frame 61 is positioned above the front of the front and rear extension frame 62 and is fixedly supported to the front and rear extension frame 62 via a predetermined support bracket 66 or the like.

[0083] The horizontal frame 61 is a frame that supports the rear of the cabin 20 from below. The horizontal frame 61 is provided with support bases 67 on both the left and right sides. The support bases 67 are horizontal plate-shaped portions that protrude rearward from the horizontal frame 61. The support bases 67 are the parts that receive the support legs (not shown) provided at the rear of the bottom surface of the cabin 20. The support legs are made of an elastic material such as rubber. The support bases 67 have circular through holes 67a formed therein for receiving the support legs.

[0084] The cabin 20 is supported by the transverse frame 61 with its support legs in contact with the left and right support bases 67 from above. The cabin 20 is rotatable forward with the left-right direction as the axis of rotation by a predetermined pivot support provided in front of the engine 11 on the machine base 25, and the rear of the cabin 20 is detachable from the left and right support bases 67. With this configuration, the driver's unit 12 located inside the cabin 20 is supported by the support frame 60 provided on the machine base 25.

[0085] The connecting frame 80 has a central front-rear extension frame 81 positioned in the front-rear direction above the engine 11, and a rear central support column 82 provided behind the engine 11. Both the central front-rear extension frame 81 and the rear central support column 82 are formed from square steel pipes.

[0086] The rear central support 82 is located at the rear of the left-right center of the engine 11 on the engine base 25. In the left-right direction, the rear central support 82 is located approximately in the center between the front left support 63 and the front right support 64, and in the front-rear direction, it is located behind the rear right support 65. The rear central support 82 is erected vertically on the engine base 25 with a support portion 82a, which is provided by fixing a predetermined support bracket to the lower end of the rear central support 82 by welding or the like, fixed to the engine base 25 with bolts or the like.

[0087] The central front-rear extension frame 81 extends horizontally along the front-rear direction and is supported at both the front and rear ends by the transverse frame 61 and the rear central support column 82. The front end of the central front-rear extension frame 81 is located above the approximate center of the transverse frame 61 and is fixedly supported via the lower support bracket 83 and the upper support bracket 84 (see Figure 17).

[0088] The lower support bracket 83 is a box-shaped bracket with a horizontal upper surface and is fixed to the horizontal frame 61 by welding. The upper support bracket 84 is a bracket with a horizontal lower surface and is roughly U-shaped in side view and is fixed to the central front-rear extension frame 81 by welding. The lower support bracket 83 and the upper support bracket 84 are fixed to each other by bolts 85 or the like with the upper surface of the lower support bracket 83 and the lower surface of the upper support bracket 84 overlapping. The support portion of the central front-rear extension frame 81 on the horizontal frame 61 is located near the right side of the left support base portion 67 provided on the horizontal frame 61.

[0089] The rear central support column 82 supports the rear end of the central front-rear extension frame 81 from below. The upper end of the rear central support column 82 is fixed to the central front-rear extension frame 81 by welding or the like.

[0090] In this way, the central front and rear extension frame 81 and the rear central support column 82, which form the connecting frame 80, create an L-shaped frame section in which one end is connected and supported to the lateral frame 61 and the other end is supported on the machine base section 25. A support frame 90 is provided on the central front and rear extension frame 81 relative to the connecting frame 80.

[0091] The support frame 90 is a member that fixes and supports the DPF case 31 and SCR case 32 to the connecting frame 80. That is, the DPF case 31 and SCR case 32 are fixedly supported on the central front and rear extending frame 81 that constitutes the connecting frame 80 via the support frame 90. In this way, the combine harvester 1 includes a support frame 90 as a fixing member provided on the connecting frame 80 as a support configuration for the exhaust gas purification device 30 relative to the machine base 25.

[0092] As shown in Figure 12, the support frame 90 is a member having a roughly rectangular plate shape, and has a roughly rectangular outer frame portion 91 and a support portion 92 which includes six straight portions arranged radially and diagonally within the outer frame portion 91. Multiple openings 93 (six in this embodiment) are formed by each side of the outer frame portion 91 and the straight portions of the support portion 92, penetrating the support frame 90 in the thickness direction. The multiple openings 93 ensure ventilation to the DPF case 31 and the SCR case 32.

[0093] In this embodiment, the support frame 90 is a cast part and has high rigidity. However, the support frame 90 is not limited to a cast part and may be made of other metal members.

[0094] The support frame 90 is fixedly supported to the central front-rear extension frame 81 via support brackets 95 and support plates 96, with its roughly rectangular plate-like outer shape oriented so that the plate thickness direction is in the left-right direction (see Figure 15). Both the support brackets 95 and support plates 96 are elongated members having approximately half the length of the central front-rear extension frame 81, and are provided on the upper side of the rear half of the central front-rear extension frame 81. In addition, the DPF case 31 and SCR case 32, and the support frame 90 that supports them, have approximately half the length of the central front-rear extension frame 81 in the front-rear direction, and are provided in a state where they are supported by the rear half of the central front-rear extension frame 81.

[0095] The support bracket 95 is a roughly rectangular tubular member having a front portion, a rear portion, a right side portion, and a top portion, with the bottom and left sides being open. The support bracket 95 is fixed to the central front-rear extension frame 81 by welding or the like, while overlapping the central front-rear extension frame 81. The top portion of the support bracket 95 is designated as the support surface portion 95a. The support surface portion 95a is a horizontal surface located above the top surface 81a of the central front-rear extension frame 81.

[0096] The support bracket 95 has an extended portion on its front and rear surfaces that runs along the left side of the central front-rear extension frame 81. The ends of the front, rear, and side surfaces of the support bracket 95 are welded to the central front-rear extension frame 81. Inside the support bracket 95, there are multiple plate-shaped support members 95b (see Figure 17) welded to the central front-rear extension frame 81 and the support bracket 95, respectively.

[0097] The support plate 96 is a substantially rectangular plate-shaped member with its longitudinal direction in the front-rear direction, and is fixed to the support bracket 95 in a state where it overlaps the upper side of the support surface portion 95a of the support bracket 95. The support plate 96 is fixed to the support bracket 95 by bolts 97 that pass through the support plate 96 and the support surface portion 95a of the support bracket 95 from above, with the right side portion in the width direction corresponding to the left-right direction overlapping the support surface portion 95a of the support bracket 95. The bolts 97 are screwed into nuts 98 located on the lower side of the support surface portion 95a. Multiple fixing points by bolts 97 are provided at predetermined intervals along the longitudinal direction of the support plate 96 (for example, four points).

[0098] The support plate 96 has most of its left side in the width direction protruding to the left from the support surface portion 95a of the support bracket 95. The support plate 96 also has bent portions at both the front and rear ends that are bent downward relative to the planar main body.

[0099] In this manner, the support frame 90 is fixedly supported to the support plate 96, which is fixed to the support bracket 95. The support frame 90 is supported by fixing bolts 99 on the portion of the support plate 96 that protrudes to the left from the support bracket 95. The support frame 90 is erected on the support plate 96 with the lower surface of the lower edge portion 91a of the outer frame portion 91 in contact with the upper surface of the support plate 96.

[0100] The fixing bolts 99 penetrate the support plate 96 from below and are screwed into threaded holes formed in the lower edge 91a of the outer frame 91. The fixing points by the fixing bolts 99 are provided at multiple locations (for example, 4 locations) at predetermined intervals along the longitudinal direction of the support plate 96.

[0101] Thus, the support frame 90 is supported by the rear of the central front-rear extension frame 81 via a support bracket 95 and a support plate 96. The support frame 90 is erected at the upper left position of the central front-rear extension frame 81 via the support bracket 95 and the support plate 96, and constitutes a support wall portion with the left-right direction as the thickness direction.

[0102] The fixing structure of the DPF case 31 and SCR case 32 to the support frame 90 will be described. Since the DPF case 31 and SCR case 32 are fixed to the support frame 90 by similar configurations, the fixing structure of the DPF case 31 will be described here, and the fixing structure of the SCR case 32 will be given the same reference numerals and its description will be omitted as appropriate.

[0103] The DPF case 31 is fixed to the support frame 90 at the front via a case mounting member 100 that is substantially L-shaped in plan view. The case mounting member 100 is, for example, a cast part. The case mounting member 100 has a fixed surface portion 101 and a support surface portion 102 as a surface portion that is substantially L-shaped in plan view.

[0104] As shown in Figure 13, the case mounting member 100 is fastened and fixed to the support frame 90 by bolts 103 at a total of four locations, two at the top and two at the bottom, with the fixing surface portion 101 aligned with the left side of the front edge portion 91b that forms the outer frame portion 91 of the support frame 90. In the case mounting member 100, the support surface portion 102 is a protruding piece that extends to the left from the front edge of the support frame 90.

[0105] The case mounting member 100 has its support surface portion 102 fastened and fixed to the front portion 31d of the DPF case 31 at two points, top and bottom, by bolts 104. The support surface portion 102 is fixed to the right end of the front portion 31d of the DPF case 31. Similarly, the support surface portion 102 of the case mounting member 100 is fixed to the right end of the front portion 32d of the SCR case 32. In this way, the front sides of the DPF case 31 and the SCR case 32 are fixedly supported to the support frame 90 by the case mounting member 100.

[0106] The DPF case 31 is fixed to the support frame 90 at the rear via a flat case mounting plate portion 105 (see Figure 12). The case mounting plate portion 105 is provided as a projection that extends to the right from the flange portion 31e provided at the rear end of the DPF case 31. The case mounting plate portion 105 is a plate-shaped portion that conforms to the roughly rectangular outer shape with the vertical direction as its longitudinal direction.

[0107] The case mounting plate portion 105 is fastened and fixed to the support frame 90 at two locations, top and bottom, by bolts 106, on the front surface of the front edge portion 91c which forms the outer frame portion 91 of the support frame 90. The bolts 106 pass through the case mounting plate portion 105 and are screwed into threaded holes formed in the front edge portion 91c. In the SCR case 32, the case mounting plate portion 105 is formed to protrude to the right from the flange portion 32e provided at the rear end of the SCR case 32. In this way, the rear sides of the DPF case 31 and the SCR case 32 are fixedly supported to the support frame 90 by the case mounting plate portion 105.

[0108] As described above, the support frame 90 that supports the DPF case 31 and SCR case 32 on both the front and rear sides has a height in the vertical direction that corresponds to the space required for the placement of both cases. That is, the lower end of the support frame 90 is located at approximately the same height as the lower end of the cylindrical case body of the DPF case 31, and the upper end of the support frame 90 is located at approximately the same height as the upper end of the cylindrical case body of the SCR case 32.

[0109] Furthermore, as shown in Figure 13, the DPF case 31 and the SCR case 32 are connected and supported to each other at the front by a case connecting plate 108. The case connecting plate 108 is a metal plate-like member having a predetermined shape with its longitudinal direction in the vertical direction.

[0110] The case connecting plate 108 is fastened and secured to the DPF case 31 and the SCR case 32, respectively, by bolts 109 at multiple points, overlapping the front portions 31d and 32d of each case from the front. The case connecting plate 108 has a configuration in which a lower connecting plate 108a fixed to the DPF case 31 and an upper connecting plate 108b fixed to the SCR case 32 are connected.

[0111] Specifically, the lower connecting plate 108a and the upper connecting plate 108b overlap each other at their opposing portions, with their fixed surfaces 108c bent inward (towards the rear), and the two connecting plates are fastened and fixed to each other by bolts 108d or the like that pass through the overlapping portion. The case connecting plate 108 is fixed to the left edge of the front portions 31d and 32d of the DPF case 31 and SCR case 32, respectively.

[0112] In this configuration, the DPF case 31 and SCR case 32 are supported by the support frame 90, that is, the DPF case 31 and SCR case 32 are arranged in two stages, upper and lower, and the two cases are connected to each other by the support frame 90. This configuration, including the urea mixing pipe 45 that connects the cases, is formed as an integrated case unit 110 (see Figures 12 and 13). This case unit 110 is then supported on the central front-rear extension frame 81 of the connecting frame 80 via support brackets 95 and support plates 96.

[0113] In this configuration, where the case unit 110 is supported on the connecting frame 80, the DPF case 31 and the SCR case 32 are positioned on the threshing section 6 side relative to the support frame 90.

[0114] In other words, the DPF case 31 and SCR case 32 are positioned between the threshing unit 6 on the left and the grain tank 7 on the right in the left-right direction, and the support frame 90 supports the DPF case 31 and SCR case 32 from the right side. As a result, the DPF case 31 and SCR case 32 are positioned to the left of the support frame 90, that is, towards the threshing unit 6 (see Figure 16).

[0115] In this configuration, the case unit 110, with the DPF case 31 and SCR case 32 supported on the left side of the support frame 90, is subjected to a force that causes the support frame 90 to tilt to the left due to the load of both cases. Therefore, the case unit 110, supported on the connecting frame 80, is supported from above relative to the threshing section 6 by a cover support frame 120, which acts as a support member. In other words, the combine harvester 1 includes a cover support frame 120 that supports the support frame 90 relative to the threshing section 6 as part of the support configuration for the exhaust gas purification device 30.

[0116] The cover support frame 120 has front and rear frame sections 121 that are symmetrically arranged front and rear, and a cover section 123 that is installed between the front and rear frame sections 121. The cover support frame 120 has approximately the same dimensions as the support frame 90 in the front-rear direction and is installed to cover the DPF case 31 and SCR case 32 from above and the left side. The cover support frame 120 is fixedly supported on one side towards the threshing section 6 and fixedly supported on the other side towards the case unit 110, and is installed to straddle the top of the SCR case 32 from left to right.

[0117] The frame portion 121 is composed of a member formed by bending an angle steel having an L-shaped cross-section into a predetermined shape. As shown in Figure 17, the frame portion 121 has a left vertical side portion 121a, a left inclined side portion 121b extending diagonally upward to the right from above the vertical side portion 121a, a horizontal side portion 121c extending to the right from above the left inclined side portion 121b, and a right inclined side portion 121d extending diagonally downward to the right from the right side of the horizontal side portion 121c. The frame portion 121 has a bent shape formed by these sides such that it covers the left and upper sides of the SCR case 32 when viewed in the front-to-back direction.

[0118] Each side of the frame portion 121 that forms a bent shape has a vertical surface portion 121e, which is one side surface with an L-shaped cross-section, positioned on the front and rear outer sides, while the other side surface portion 121f is positioned on the outer circumference of the bent shape that covers the SCR case 32. That is, in each side of the frame portion 121 that forms a bent shape, the vertical surface portion 121e is a plate-like portion with the front-to-rear direction as the plate thickness direction, and the outer surface portion 121f is a plate-like portion that is perpendicular to the vertical surface portion 121e together with the vertical surface portion 121e on the outer circumference side of the frame portion 121. For example, with respect to the front frame portion 121 of the front and rear frame portions 121, in the vertical side portion 121a, the vertical surface portion 121e is a plate-like portion with the front-to-back direction as the plate thickness direction and the up-to-down direction as the longitudinal direction, and the outer surface portion 121f is bent from the left side of the vertical surface portion 121e toward the rear, and is a plate-like portion with the left-to-right direction as the plate thickness direction and the up-to-down direction as the longitudinal direction.

[0119] The cover portion 123 is a bent plate-like portion provided on the outside of the front and rear frame portions 121. The cover portion 123 has a bent shape that follows the bent form of the front and rear frame portions 121 when viewed in the front-rear direction. That is, the cover portion 123 has a vertical surface portion 123a, a left-sloping surface portion 121b, a horizontal surface portion 121c, and a right-sloping surface portion 121d, which are surfaces along the vertical side portion 121a, the left-sloping side portion 121b, the horizontal side portion 121c, and the right-sloping side portion 121d of the frame portion 121.

[0120] The cover portion 123 is provided by fixing a single, integrally bent plate-shaped member to the front and rear frame portions 121. The bent plate-shaped member forming the cover portion 123 is fastened and fixed at multiple points by bolts 124 with its front and rear edges overlapping the outer surface portions 121f of each bent side of the front and rear frame portions 121 from the outside.

[0121] The bolt 124 penetrates the outer surface portion 121f of the cover portion 123 and the frame portion 121 from the outside of the cover support frame 120 and is screwed into the nut portion 129 provided on the inner circumference of the outer surface portion 121f. The vertical surface portion 123a and the left-sloping surface portion 123b of the cover portion 123 have numerous circular holes formed in a predetermined arrangement, and these surfaces are perforated metal. This ensures ventilation between the inside and outside of the cover support frame 120.

[0122] The cover support frame 120, having the above configuration, fixes and supports the lower left ends of the front and rear frame portions 121, that is, the lower ends of the vertical sides 121a, to a predetermined flat portion 130 provided on the upper surface of the threshing section 6 via support members 125 (see Figure 16). The flat portion 130 is part of the outer wall portion that forms the threshing chamber etc. that houses the threshing drum 6a in the threshing section 6, and is a surface portion formed along the front-rear direction at the right edge of the upper part of the threshing section 6 (see Figure 3).

[0123] The support member 125 has a vertical surface portion 125a and a horizontal surface portion 125b, and is a bent plate-shaped member that forms a roughly L-shape when viewed from the left side. The support member 125 is fixed to the frame portion 121 at two points, top and bottom, by bolts 126 or the like, with the vertical surface portion 125a overlapping the vertical surface portion 121e at the lower end of the vertical side portion 121a of the frame portion 121 from the front and rear outer sides.

[0124] The support member 125 is fixed to the flat portion 130 of the threshing section 6 at two points on the left and right by bolts 127, with its lateral portion 125b aligned with the flat portion 130 from above. The support member 125 has a roughly trapezoidal shape in its vertical portion 125a, with the left portion protruding to the left from the vertical edge portion 121a of the frame portion 121. The lateral portion 125b is a roughly rectangular portion with a length corresponding to the lower edge of the vertical portion 125a in the left-right direction. Of the two fixing points on the left and right by bolts 127, the left fixing point is provided on the portion of the lateral portion 125b that extends to the left from the vertical edge portion 121a.

[0125] Furthermore, the tailpipe 47 is supported by a support rod 128 against the flat surface 130 of the threshing section 6. The support rod 128 is made up of a straight rod-shaped member and is fixed to the flat surface 130 via a support stay 131 which is fixed to its lower end with a bolt or the like. The support stay 131 is fixed to the flat surface 130 with a bolt 131a. The upper end of the support rod 128 is fixed with a bolt or the like to a support projection 132 which is provided on the lower side of the tailpipe 47.

[0126] On the other hand, as shown in Figure 17, the cover support frame 120 is connected and fixed to the support frame 90 via a first support plate 135 and a second support plate 136. The first support plate 135 is a member similar to the support plate 96 provided on the lower side of the support frame 90, and is located above the support plate 96 so as to face it vertically, with substantially the same position in the left-right and front-back directions as the support plate 96.

[0127] The first support plate 135 is positioned with its left side in the width direction above the upper surface of the upper edge 91d of the outer frame portion 91 of the support frame 90, and is fixed to the support frame 90 by fixing bolts 137. The fixing bolts 137 penetrate the first support plate 135 from above and are screwed into threaded holes formed in the upper edge 91d of the outer frame portion 91. Multiple fixing points (for example, four) are provided on the first support plate 135 at predetermined intervals along its longitudinal direction.

[0128] The second support plate 136 is a angle steel-like member having a roughly L-shaped cross-section and has approximately the same length as the first support plate 135. The second support plate 136 has a fixed surface portion 136a and a support surface portion 136b as a surface portion having a roughly L-shaped cross-section. The fixed surface portion 136a is superimposed on the upper side of the right side portion in the width direction of the first support plate 135, and the support surface portion 136b is positioned upright on the right side.

[0129] The second support plate 136 is fixed to the first support plate 135 by bolts 138. The bolts 138 pass through the fixing surface portion 136a of the second support plate 136 and the first support plate 135 from above and are screwed into a nut portion 139 provided on the lower side of the first support plate 135. Multiple fixing points by bolts 138 are provided at predetermined intervals along the longitudinal direction of the second support plate 136 (for example, three locations).

[0130] The right end of the cover support frame 120 is fixed to the second support plate 136. Specifically, the right ends of the front and rear frame portions 121 that constitute the cover support frame 120 are fixed to the second support plate 136 by welding or the like. The front and rear frame portions 121 have a tip surface portion 121g that is fitted inward with the second support plate 136 and contacts the upper surface of the fixing surface portion 136a and the left side surface of the support surface portion 136b of the second support plate 136 as the fixing portion to the second support plate 136.

[0131] As described above, the cover support frame 120 is provided in a manner that extends from the threshing section 6, extends over the SCR case 32, and is fixed to the upper side of the support frame 90, supporting the case unit 110 relative to the threshing section 6. In other words, the cover support frame 120 is provided in a manner that spans from the left side to the upper side of the DPF case 31 and SCR case 32, between the threshing section 6 side and the support frame 90 side, and supports the support frame 90 that supports the DPF case 31 and SCR case 32 relative to the threshing section 6.

[0132] Furthermore, an upper support column 140 is installed between the first support plate 135 and the support plate 96. The upper support column 140 is a straight column portion that runs vertically and is provided between the rear ends of the first support plate 135 and the support plate 96. The upper support column 140 is formed from a square steel pipe and is fixed to the first support plate 135 and the support plate 96 by welding or the like.

[0133] Furthermore, an outlet pipe support stay 141 is provided from the rear frame portion 121 of the cover support frame 120 to support the base end of the SCR outlet pipe 46 from above (see Figure 15). The outlet pipe support stay 141 has a support body portion 141a that protrudes diagonally downward and rearward from the left and right center of the horizontal side portion 121c of the rear frame portion 121, and is fixed to the upper part of the base end of the SCR outlet pipe 46. The outlet pipe support stay 141 supports the SCR outlet pipe 46 in a position where its base end is concentric with the outlet portion 32c of the SCR case 32.

[0134] Furthermore, of the DPF case 31 and SCR case 32, the lower DPF case 31 is positioned opposite the inclined surface 145 located to the right of the flat surface 130 of the threshing unit 6 (see Figure 16). The inclined surface 145 is part of the outer wall portion of the threshing unit 6 that forms the threshing chamber housing the threshing drum 6a, and is a surface formed to the right of the flat surface 130, extending in the front-rear direction along the flat surface 130. The inclined surface 145 is provided in the front-rear direction within the area where the DPF case 31 and SCR case 32 are installed.

[0135] The slope section 145 is a slope that slopes downward from left to right. The angle of inclination of the slope section 145 is, for example, about 50° with respect to the horizontal plane. The DPF case 31 is positioned to the upper right of the slope section 145, which is located in the upper right part of the threshing section 6, so that it is positioned opposite the slope section 145.

[0136] Furthermore, in a view from the front and rear, the sloping portion 145 of the threshing section 6 is aligned with the direction in which the DPF outlet pipe 42 extends from the rear surface 31b of the DPF case 31. That is, in a view from the rear, the angle of inclination of the sloping portion 145 with respect to the horizontal direction and the angle of inclination of the DPF outlet pipe 42 with respect to the horizontal direction are approximately the same, and the DPF outlet pipe 42 extends upward and to the left along the inclination of the sloping portion 145.

[0137] Furthermore, the DPF case 31, positioned opposite the sloping section 145, is located at a lower height than the horizontal upper surface 6b of the outer wall portion that forms the threshing chamber, etc. The upper surface 6b is located to the left of the flat section 130 and is positioned higher than the flat section 130.

[0138] Thus, the exhaust gas purification device 30 is installed in a recessed space formed by the sloping surface 145 of the threshing section 6, the grain tank 7, and the rearward-sloping rear wall 20a of the cabin 20. With this arrangement of the exhaust gas purification device 30, the left side of the exhaust gas purification device 30 is located above the upper surface 6b of the threshing section 6 and is exposed to the left side of the combine harvester 1 (see Figure 1).

[0139] Next, the arrangement of the urea water supply device 50 will be described. As described above, the exhaust gas purification device 30 is provided with a urea water supply device 50 for supplying urea water to the urea injection unit 48 (see Figure 14). The urea water supply device 50 is installed in a state supported by the connecting frame 80.

[0140] As shown in Figure 15, the urea water supply device 50 has a case 150 that forms the exterior of the device, and various components necessary for the device to perform its functions are housed inside the case 150. The case 150 has a roughly rectangular parallelepiped shape.

[0141] The urea water supply device 50 is supported by a support stay 151 on the rear central support column 82 that constitutes the connecting frame 80. The support stay 151 is a plate-shaped member having a size corresponding to the outer shape of the case 150, and is fixed to the upper part of the rear central support column 82 with the left-right direction being the plate thickness direction.

[0142] The support stay 151 is provided so as to extend forward from the left side of the front surface 82b of the rear central support column 82, and is fixed to the rear central support column 82 by welding or the like. On both the upper and lower rear sides of the support stay 151, there are bent portions 151a that are bent to the right relative to the planar main body.

[0143] The urea water supply device 50 is located to the right of the support stay 151 and is supported by the support stay 151 with the case 150 fixed to the support stay 151 at multiple points using fasteners such as bolts.

[0144] With this support configuration for the urea water supply device 50, the urea water supply device 50 is located below the rear of the central front-rear extension frame 81. Therefore, in a side view, the urea water supply device 50 is positioned below the DPF case 31. Also, in a rear view, the left side of the urea water supply device 50 is hidden by the rear central support column 82 (see Figure 18).

[0145] Furthermore, a urea injection controller 55 for controlling the urea water supply device 50 is provided on the right front side of the urea water supply device 50. The urea injection controller 55 is supported by a predetermined support member on the connecting frame 80.

[0146] Specifically, as shown in Figures 15 and 18, the urea injection controller 55 is supported by a sensor support plate 156 located to the right of the support stay 151. The sensor support plate 156 is a plate-shaped member having a size corresponding to the outer shape of the urea injection controller 55, and is provided parallel to the support stay 151.

[0147] The urea injection controller 55 has a flattened box-like outer shape and is supported vertically on the right side of the sensor support plate 156, along the sensor support plate 156. The urea injection controller 55 is fixed to the sensor support plate 156 at multiple points by bolts 157, etc. The bolts 157 pass through bosses provided on the outer edge of the case of the urea injection controller 55 and the sensor support plate 156, and are screwed into nuts 158 provided on the left side of the sensor support plate 156.

[0148] The sensor support plate 156 is supported on both the upper and lower sides by an upper support arm portion 161 extending to the right from the lower side of the central front-rear extension frame 81, and a lower support arm 162 extending to the right from the support stay 151.

[0149] The upper support arm section 161 has front and rear support arms 163 extending to the right from the lower side of the central front and rear extension frame 81, and an intermediate arm section 164 provided between the front and rear support arms 163. The front and rear support arms 163 and the intermediate arm section 164 are provided in a manner that is approximately parallel to each other and slopes downward to the right, and the right end of each is supported by the sensor support plate 156 via an interposing plate 165.

[0150] The intervening plate 165 is a corner steel-like member with a roughly L-shaped cross-section. It is provided on the left side of the sensor support plate 156, along the upper edge of the sensor support plate 156, and is fixed to the sensor support plate 156 at two points, front and rear, by bolts 166. The intervening plate 165 is positioned so that one of its roughly L-shaped surfaces is aligned with the sensor support plate 156, and the other surface is facing downwards. The front and rear support arms 163 and the right end of the intermediate arm portion 164 are fixed to the intervening plate 165 by welding.

[0151] Each of the front and rear support arms 163 is fixed at its left end to a support bracket 167 by fasteners such as bolts. The support bracket 167 is a roughly U-shaped bracket fixed to the lower surface 81b of the central front and rear extension frame 81 by welding or the like, and the support arms 163 are fixedly supported to the underside of the support bracket 167. The support arms 163 are angle steel members with a roughly L-shaped cross-section.

[0152] The intermediate arm portion 164 is the right-hand portion of the lateral support frame 168, which is positioned approximately left-right below the central front-rear extension frame 81. The lateral support frame 168 is formed from U-shaped steel, with its lower end open, and its left and right intermediate portions are supported by the central front-rear extension frame 81 via support brackets 169. The support bracket 169 is a plate-shaped member bent into an approximately U-shape, and is fixed to the central front-rear extension frame 81 by welding or the like, in such a manner that the lower part of the central front-rear extension frame 81 is fitted into approximately rectangular recesses on its front and rear surfaces. The bottom surface of the support bracket 169 is also fixed to the upper surface of the lateral support frame 168 by fasteners 170 such as bolts.

[0153] The lateral support frame 168 extends to the left of the central front-rear extension frame 81, and its left end is supported by the upper end of the vertical support frame 172 via a bracket 171. The left end of the lateral support frame 168 is fixed to the bracket 171 by welding or the like. The bracket 171 is fixed to the vertical support frame 172 by fasteners such as bolts. The vertical support frame 172 is supported on the machine base 25 by a support part (not shown).

[0154] The lower support arm 162 is a long, slender plate-shaped member that is installed between the support stay 151 and the sensor support plate 156. As shown in Figure 18, a fixing portion 162a is formed at the left end of the lower support arm 162, which is bent at a right angle to the straight main body.

[0155] The lower support arm 162 is fixed to the support stay 151 by bolts 173 and nuts 174 that pass through them, with the fixing portion 162a overlapping the lower edge of the support stay 151 from the right side. On the other hand, the right end of the lower support arm 162 is fixed to the sensor support plate 156 by bolts 175 and nuts 176 that pass through them, with the right end overlapping the bent portion 156a, which is formed to the left at the lower end of the flat main body portion of the sensor support plate 156, from below.

[0156] In the configuration described above, where the urea injection controller 55 is supported on the sensor support plate 156, the urea injection controller 55 is located near the right front side of the urea water supply device 50. In a right side view, the urea injection controller 55 is positioned so that its rear overlaps the front of the urea water supply device 50. Furthermore, the urea water supply device 50 and the urea injection controller 55 are located at approximately the same height.

[0157] In the combine harvester 1, the grain tank 7 is rotatably mounted around the axis of the vertical discharge conveyor 9b of the discharge auger 9, so as to open its front side outwards from the machine. By rotating the grain tank 7 to open it outwards (to the right), the right side of the threshing section 6 and the engine room 13 are opened.

[0158] The grain tank 7, which is rotatably mounted in this manner, is provided with a locking device 180 for fixing the grain tank 7 in its storage position. The configuration of the locking device 180 will now be described.

[0159] As shown in Figures 19 and 20, the locking device 180 is configured to hold the grain tank 7 in the stored position by engaging a locking plate 182 provided on the grain tank 7 side with a locking pin member 181 provided on the traveling body 4 side, which serves as a locking member.

[0160] The lock pin member 181 is provided on the upper support column 140 located above the central front-rear extension frame 81 of the connecting frame 80 in the traveling machine body 4. The lock pin member 181 has a pair of pin support plates 183 and a pin body 184 installed between the pair of pin support plates 183. The lock pin member 181 is constructed as an integrated member by the pair of pin support plates 183 and the pin body 184.

[0161] The pin support plate 183 is a flat plate-shaped member having a predetermined shape. A pin body 184 is installed between the longitudinal portions of a pair of pin support plates 183. The pin body 184 is a cylindrical member having a circular cross-section, and both ends are fitted into circular support holes formed in the pin support plates 183, and the pin body 184 is fixed to the pin support plates 183 by welding or the like.

[0162] The lock pin member 181 is fixed to a pair of front and rear fixing plates 185 provided at the lower part (near the lower end) of the upper support column 140. The fixing plate 185 has a flat body surface having a predetermined shape and a bent portion formed at a right angle along the upper and lower edges of the body surface, and the edges of the upper and lower bent portions are fixed to the front surface 140a or rear surface 140b of the upper support column 140 by welding or the like. Therefore, a space is formed between the body surface of the fixing plate 185 and the front surface 140a or rear surface 140b of the upper support column 140. The right portion of the fixing plate 185 protrudes to the right relative to the right side surface 140c of the upper support column 140.

[0163] The lock pin member 181 is positioned inward relative to the front and rear fixing plates 185, with a pair of pin support plates 183 positioned on the front and rear sides, and is fixed to the fixing plates 185 at two points by fixing bolts 186. The fixing bolts 186 pass through the pin support plates 183 and the fixing plates 185 and are screwed into nuts (not shown) located on the inside of the pin support plates 183.

[0164] The lock pin member 181 is fixed to the front and rear fixing plates 185, with the support portion of the pin body 184 on the pin support plate 183 protruding to the right from the fixing plate 185. The bolt hole 185a in the fixing plate 185 through which the fixing bolt 186 passes is an elongated hole with the left-right direction as its longitudinal direction, allowing for left-right position adjustment of the lock pin member 181 relative to the fixing plate 185.

[0165] As shown in Figures 19 and 20, the lock plate 182 is supported by a base plate 190 on the front portion 7a, which is a vertical planar portion of the grain tank 7. The base plate 190 is a flat plate-shaped member having a predetermined shape, with the right side (left side in Figure 20) fixed to the front portion 7a at four points by fixing bolts 191, and the left side protruding to the left from the front portion 7a.

[0166] The leftward protruding portion of the base plate 190 has an acute-angled shape due to the upper slanted edge portion 190a, and an engaging recess 190b is formed at the tip of the protruding portion, with the left side being the open side. The engaging recess 190b is a recess into which the pin body 184 of the lock pin member 181 is fitted.

[0167] The lock plate 182 is a flat plate-shaped member having a predetermined shape, located on the front side of the base plate 190, and is rotatably supported relative to the base plate 190 by a pivot support 195 whose pivot axis is oriented perpendicular to the base plate 190 (front-to-back direction). The pivot support 195 is located on the right side of the lock plate 182.

[0168] The lock plate 182 has a hook portion 182a on its left side that forms an engagement recess 182b. The lock plate 182 engages with the pin body 184, which is fitted into the engagement recess 190b of the base plate 190, by hooking the hook portion 182a from below through a rotational movement by the pivot portion 195.

[0169] The lock plate 182 is biased in a direction that engages with the pin body 184 (counterclockwise in Figure 20) by a biasing spring 196, which is a coil-shaped tension spring, in relation to the rotational movement of the pivot support 195. The biasing spring 196 is located to the left of the pivot support 195, with one end, the upper side, locked and supported by an upper support pin 197 protruding from the front surface 190c of the base plate 190, and the other end, the lower side, locked and supported by a lower support pin 198 protruding from the front surface 182c of the lock plate 182.

[0170] The locking device 180 is in the locked state when the lock plate 182, which is biased by the biasing spring 196, engages the hook portion 182a with the pin body 184, which is fitted into the engagement recess 190b of the base plate 190. In other words, in the locked state of the locking device 180, the pin body 184 is fitted into the engagement recess 190b of the base plate 190 and also into the engagement recess 182b of the lock plate 182, and is held and fixed between the base plate 190 and the lock plate 182, which is biased by the biasing spring 196.

[0171] Furthermore, one end of an operating rod 199 is connected to the lower end of the lock plate 182. The operating rod 199 extends downward from the lock plate 182, and its other end is connected to a release lever (not shown) provided on the front part 7a of the grain tank 7. By operating the release lever, the operating rod 199 is pushed and pulled, causing the lock plate 182 to rotate.

[0172] When the locking device 180 is in the locked state, pulling the operating rod 199 with the release lever causes the locking plate 182 to rotate downward (clockwise in a front view) against the biasing force of the biasing spring 196, disengaging the locking plate 182 from the pin body 184 and releasing the lock. This allows the grain tank 7 to rotate outwards from the machine. When the grain tank 7, which has been rotated outwards from the machine, is returned to its storage position, the locking plate 182 comes into contact with the pin body 184 on its left-sloping edge, rotates downward once, and then returns due to the biasing force of the biasing spring 196, engaging the pin body 184 into the engagement recess 182b, thereby automatically locking the locking device 180.

[0173] As described above, the combine harvester 1 has an upper support column 140 as an extension frame extending upward from the connecting frame 80, and the upper support column 140 is provided with a lock pin member 181 which constitutes a locking device 180 for fixing the grain tank 7 in the storage position on the traveling machine body 4 (see Figure 17). The upper support column 140 is erected on the upper side near the rear end of the central front and rear extension frame 81 of the connecting frame 80 via a support bracket 95 and a support plate 96, and extends upward.

[0174] Furthermore, the combine harvester 1 is equipped with an intercooler 200, which acts as a heat exchanger to cool the air supplied to the engine 11. The intercooler 200 functions as a cooling device that receives air discharged from the compressor of the supercharger 40 of the engine 11 and cools that air. The air cooled by the intercooler 200 is supplied to the intake manifold of the engine 11 as supply air to the engine 11.

[0175] The intercooler 200 is positioned on the outside of the exhaust gas purification device 30. In this embodiment, the intercooler 200 is installed to the right of the DPF case 31 and SCR case 32, which are arranged vertically in the exhaust gas purification device 30. The intercooler 200 is mounted on the machine base 25, in a position to the upper right of the engine 11, and is supported by a predetermined support member.

[0176] The intercooler 200 is enclosed in a box-shaped case 201 with a roughly rectangular parallelepiped shape. The intercooler 200 is installed with the case 201's roughly rectangular parallelepiped shape oriented such that the longitudinal direction is the front-to-back direction in a plan view, and the longitudinal direction is the up-to-down direction in a front-to-back view.

[0177] The intercooler 200 is positioned at approximately the same height as the DPF case 31 and SCR case 32 in the vertical direction. Specifically, as shown in Figure 10, the intercooler 200 has its lower surface 201a of case 201 positioned below the lower end of the DPF case 31, and its upper surface 201b positioned above the upper end of the DPF case 31. Furthermore, the intercooler 200 has its upper surface 201b positioned below the upper end of the SCR case 32 in the vertical direction.

[0178] As described above, the exhaust gas purification device 30 and the intercooler 200 are positioned behind the driver unit 12 located above the engine 11, facing each other in the left-right direction with a space between them. In this embodiment, the intercooler 200 is located to the right of the DPF case 31 and the SCR case 32, and the left side portion 201c of the case 201 is positioned facing the support frame 90 located to the right of the DPF case 31 and the SCR case 32.

[0179] In detail, the case 201 of the intercooler 200 has approximately the same vertical dimensions as the support frame 90 and is located to the lower right of the support frame 90 (see Figure 10). The intercooler 200 is positioned slightly lower than the support frame 90. Therefore, in the vertical direction, most of the upper part of the case 201 of the intercooler 200 is located within the outer shape of the support frame 90. Also, in the front-to-back direction, most of the rear part of the case 201 of the intercooler 200 is located within the outer shape of the support frame 90 (see Figure 8).

[0180] As described above, the intercooler 200, positioned to the right of the exhaust gas purification device 30, is located on the inside (left side) of the upper part of the outside air intake cover 15 (see Figure 2). An outside air intake port 203 is provided at the top of the outside air intake cover 15, which is above the rotary screen 16.

[0181] As shown in Figure 4, the intake port 203 has an opening 203a that follows the outer shape of the upper part of the outside air intake cover 15 and whose lower side follows the circular shape of the opening 16a of the rotary screen 16, with a mesh dust screen 203b stretched over it. The intercooler 200 is positioned so that most of it overlaps the intake port 203 when viewed from the right side.

[0182] An air inlet pipe 205 and an air outlet pipe 206 are routed between the intercooler 200 and the engine 11.

[0183] One end of the air inlet pipe 205, the upstream side, is connected to the compressor side of the supercharger 40. The other end of the air inlet pipe 205, the downstream side, is connected to an inlet 207 located at the front of the lower side of the lower surface portion 201a of the case 201 (see Figure 21). The air inlet pipe 205 is positioned to pass under the horizontal frame 61. The inlet 207 is a cylindrical projection located at the front of the duct portion 209, which is located on the lower side of the lower surface portion 201a, and opens to the left.

[0184] The air inlet pipe 205 is positioned to the left from the inlet 207 and extends forward and downward on the right side of the engine 11, connecting to the supercharger 40 located at the front upper part of the engine 11 from the right. Through the air inlet pipe 205, air discharged from the compressor of the supercharger 40 is supplied to the intercooler 200 and cooled as it passes through a predetermined air passage 204 (see Figure 23) having fins etc., provided inside the case 201.

[0185] One end of the air outlet pipe 206, the upstream side, is connected to an outlet 208 located at the rear of the lower surface portion 201a of the case 201 (see Figure 21). The outlet 208 is a cylindrical projection located at the rear of the duct portion 209, opening to the left. The other end of the air outlet pipe 206, the downstream side, is connected to the intake manifold of the engine 11.

[0186] The air outlet pipe 206 extends from the outlet 208 toward the lower left front and connects from the right to the intake manifold located at the upper rear of the engine 11. The air outlet pipe 206 supplies air cooled within the case 201 to the intake manifold of the engine 11.

[0187] The support configuration for the intercooler 200 on the machine base 25 will now be described. The intercooler 200 is installed in a state where it is supported by the support frame 60, similar to the exhaust gas purification device 30.

[0188] As described above, the exhaust gas purification device 30 consists of a DPF case 31 and an SCR case 32 which together with a support frame 90 constitute a case unit 110, and the case unit 110 is supported by a support frame 60 via a connecting frame 80. The case unit 110 is supported by a central front-rear extending frame 81 which constitutes the connecting frame 80 via a support bracket 95 and a support plate 96.

[0189] The intercooler 200 is supported on the front and rear extension frames 62 that constitute the support frame 60. The intercooler 200 is supported on the front and rear extension frames 62 by fixing support stays 212 provided on the case 201 to support projections 211 provided on the front and rear extension frames 62 on both the front and rear sides of the case 201. The support portion 210, consisting of the support projections 211 and the support stays 212, is configured symmetrically in the front and rear direction. Figure 22 shows the rear support portion 210 of the intercooler 200. Note that the duct portion 209 and other parts are omitted from the illustration in Figure 22.

[0190] The support projection 211 is provided on the upper surface 62c of the front-to-rear extension frame 62 by fixing a bent plate-shaped metal fitting, which is roughly U-shaped in plan view, in an upright position with the left side as the open side, by welding or the like. The support projection 211 has a flat surface portion oriented in the left-to-right direction as the thickness direction of the plate, which serves as the fixing surface portion 211a that receives the support stay 212. A fixing hole is formed through the fixing surface portion 211a. The support projection 211 is provided at two locations, front and rear, separated by a distance greater than the front-to-rear dimension of the case 201. The rear support projection 211 is provided on the rear extension portion 62a of the front-to-rear extension frame 62.

[0191] The support stay 212 is a longitudinally bent plate-shaped member having a substantially L-shaped cross-section, and is fixed to the front portion 201d and the rear portion 201e of the case 201, respectively, with its longitudinal direction being the vertical direction. The support stay 212 has a surface portion having a substantially L-shaped cross-section, which is fixed to the case 201 side and a support surface portion 212b fixed to the support projection portion 211 side.

[0192] The support stay 212 is provided with the case 201 such that its lower part protrudes below the lower surface 201a by welding or other means to the upper fixed surface portion 212a of the support stay 212 to the front portion 201d or the rear portion 201e. The lower end of the support stay 212, the support surface portion 212b of the support stay 212, is overlapped with the fixed surface portion 211a of the support projection portion 211 from the right side and fixed to the support projection portion 211 by a fixing bolt 213. The fixing bolt 213 passes through the support surface portion 212b and the fixed surface portion 211a and is screwed into a nut portion 214 provided on the left side of the support surface portion of the support projection portion 211.

[0193] Thus, the support stay 212 constitutes legs that protrude downward on both the front and rear sides of the case 201, and the lower ends of the legs are fixed to support projections 211 that protrude onto the front and rear extension frame 62. Therefore, a space is formed between the upper surface 62c of the front and rear extension frame 62 and the lower surface 201a of the case 201, and this space serves as the arrangement space for the duct section 209 to which the air inlet pipe 205 and air outlet pipe 206 are connected.

[0194] As described above, the combine harvester 1 has a frame configuration provided on the machine base 25, which includes a connecting frame 80 as a first support frame that is supported by the support frame 60 and supports the exhaust gas purification device 30, and a front and rear extension frame 62 as a second support frame that supports the intercooler 200. The connecting frame 80 and the front and rear extension frame 62 are connected and supported by a lateral frame 61 which serves as a connecting member.

[0195] Furthermore, the intercooler 200 is supported by two support rods, a first support rod 221 and a second support rod 222, which are erected between the intercooler 200 and the frame supporting the exhaust gas purification device 30. In this embodiment, the frame supporting the exhaust gas purification device 30 is a first support plate 135 provided on the upper side of the support frame 90.

[0196] The first support rod 221 and the second support rod 222 are both straight pipe-shaped members with a circular cross-section, and are arranged in a roughly left-right direction with a slight downward slope to the right. The first support rod 221 is located behind the second support rod 222.

[0197] The first support rod 221 has flat fixing pieces 221a and 221b at both ends. The first support rod 221 has one fixing piece 221a, located on the left side, fixed to a support stay 223 fixed to the first support plate 135 by a bolt 224 or the like (see Figure 17).

[0198] The support stay 223 is formed by fixing a roughly L-shaped metal fitting to the lower side of the intermediate portion between the front and rear of the first support plate 135 by welding or the like, thereby creating a hanging mounting surface portion with the front-to-rear direction being the thickness direction of the plate. The first support rod 221 is fixed to the support stay 223 by a bolt 224 that passes through the fixing piece 221a and the support stay 223, and a nut portion that receives the screw of the bolt 224, with the fixing piece 221a overlapping the support stay 223 from the rear.

[0199] The first support rod 221 has its other fixing piece 221b, located on the right side, fixed to the upper left corner of the rear surface 201e of the case 201 by a bolt 225 or the like. The first support rod 221 is fixed to the case 201 by a bolt 225 that penetrates the wall portion forming the fixing piece 221b and the rear surface 201e, and a nut portion 226 into which the bolt 225 is screwed, with the fixing piece 221b overlapping the rear surface 201e from the rear.

[0200] The second support rod 222 has flat fixing pieces 222a and 222b at both ends. The second support rod 222 has one fixing piece 222a, located on the left side, fixed to a downwardly bent portion 135a formed at the rear end of the first support plate 135 by a bolt 227 or the like. The second support rod 222 is fixed to the first support plate 135 by a bolt 227 that passes through the fixing piece 222a and the bent portion 135a, and a nut into which the bolt 227 is screwed, with the fixing piece 222a overlapping the bent portion 135a from the rear.

[0201] The second support rod 222 has its other fixing piece 222b, located on the right side, fixed to a support stay 229, which is fixed to the upper left corner of the front part 201d of the case 201, by a bolt 230 or the like.

[0202] The support stay 229 is a longitudinal metal fitting having a roughly U-shaped cross-section, and is fixed to the front part 201d of the case 201 by welding or the like so that it protrudes upward and to the left from the upper left corner of the front part 201d of the case 201. The second support rod 222 is fixed to the support stay 229 by a bolt 230 that passes through the fixing piece 222b and the support stay 229, and a nut portion 231 into which the bolt 230 is screwed, with the fixing piece 222b overlapping the support stay 229 from the rear.

[0203] Thus, the intercooler 200 is connected and supported to the exhaust gas purification device 30 by two support rods, a first support rod 221 and a second support rod 222, at the front and rear. In particular, in this embodiment, the upper ends of both the front and rear sides of the case 201 (the left corner) are supported to the exhaust gas purification device 30 by the first support rod 221 and the second support rod 222.

[0204] As described above, the intercooler 200 supported on the machine base 25 has a fan 240 capable of blowing air toward the exhaust gas purification device 30. As shown in Figure 23, the fan 240 is an electric fan having a fan body 241 and an electric fan motor 242 as a drive source for driving the fan body 241. The drive shaft of the fan motor 242 is connected to the central axis of the fan body 241.

[0205] The fan 240 is positioned on the left side within the case 201, with the rotation axis of the fan body 241 oriented in the left-right direction. A circular opening, the ventilation port 201f, is formed on the left side surface 201c of the case 201, concentric with the fan body 241 (see Figure 21). The ventilation port 201f is formed to expose almost the entire fan 240 when viewed from the left side.

[0206] On the other hand, the right side of the case 201 has a configuration in which a mesh-like dustproof net 201g is stretched over a rectangular frame portion that conforms to the outer shape of the case 201 (see Figure 8). As shown in Figure 8, on the right side of the case 201, a dustproof rotating blade 244 is provided on the outside (right side) of the dustproof net 201g, which rotates due to the airflow generated by the rotation of the fan 240.

[0207] As shown in Figure 23, the fan 240 is connected to a fan control controller 250 provided in the combine harvester 1 by a predetermined connection cable 245. The operation of the fan 240 is controlled by the controller 250. The controller 250 is composed of, for example, a microcontroller, memory, and an input / output interface. However, the configuration of the controller 250 is not particularly limited.

[0208] The fan 240 is configured to rotate in both forward and reverse directions. That is, the fan 240 is configured so that the fan body 241 can be rotated in either the forward or reverse direction by the driving force of the fan motor 242.

[0209] The rotation direction of the fan body 241 is controlled by the controller 250, which controls the operation of the fan motor 242. The fan 240 and the controller 250 are configured to control the operation of the fan 240 by controlling the fan motor 242, for example, by PWM (Pulse Width Modulation) control.

[0210] In PWM control, when fan 240 is to rotate forward, the PWM output for forward motor rotation from controller 250 is input to fan motor 242, causing fan motor 242 to rotate in the forward direction and fan body 241 to rotate in the forward direction. On the other hand, when fan 240 is to rotate backward, the PWM output for reverse motor rotation from controller 250 is input to fan motor 242, causing fan motor 242 to rotate in the reverse direction and fan body 241 to rotate in the reverse direction. In addition, the rotation speed of fan 240 can also be changed during rotation control. Furthermore, the rotation direction of fan 240 can be controlled, for example, by an operating unit provided on the operating unit 12.

[0211] In the intercooler 200 having the above configuration, when the fan 240 is rotating in the forward direction, the intake port 203 of the outside air intake cover 15 located to the right of the intercooler 200 becomes the intake port for outside air and is supplied to the intercooler 200. That is, the air taken in from the intake port 203 is taken into the case 201 from the dustproof mesh 201g as cooling air for the air passing through the air passage 204, and is sent to the left from the ventilation port 201f of the case 201 through the outer wall surface of the air passage 204. The air sent out from the ventilation port 201f is supplied to the DPF case 31 and the SCR case 32.

[0212] On the other hand, when fan 240 is rotating in reverse, outside air is drawn into case 201 through the ventilation opening 201f of case 201. The air drawn into case 201 is discharged through the dust screen 201g and also discharged to the outside through the intake port 203 of the outside air intake cover 15.

[0213] When the fan 240 is rotating forward, dust, dirt, straw, etc. are collected by the dust screen 203b of the intake port 203 and the dust screen 201g of the case 201, preventing dust and other debris from entering the case 201 along with the outside air. On the other hand, when the fan 240 is rotating backward, the airflow from the fan 240 removes dust and other debris that has adhered to the dust screen 201g of the case 201 and the dust screen 203b of the intake port 203.

[0214] Furthermore, the combine harvester 1 is equipped with an air cleaner 261 and a pre-cleaner 262 that constitute the intake system of the engine 11 and are connected to each other by an intake pipe 263.

[0215] The pre-cleaner 262 is located at the upstream end of the air intake path to the engine 11, and air is drawn into the air intake path from the pre-cleaner 262. The pre-cleaner 262 removes dust and other particles from the air, purifying the air drawn into the air intake path.

[0216] Downstream of the pre-cleaner 262, an air cleaner 261 is provided via an air intake pipe 263. The air cleaner 261 further purifies the air that has been purified by the pre-cleaner 262 and supplies it to the engine 11. A downstream air intake pipe 265 extends from the air discharge side of the air cleaner 261, and the downstream side of the downstream air intake pipe 265 is connected to the air intake section provided on the compressor side of the supercharger 40 (see Figure 7).

[0217] The air cleaner 261 has a substantially cylindrical outer shape and is positioned between the exhaust gas purification device 30 and the intercooler 200 with its cylindrical axis (longitudinal direction) oriented in the front-to-back direction. More specifically, the air cleaner 261 has approximately the same dimensions in the front-to-back direction as the front-to-back dimensions of the case 201 of the intercooler 200 and is positioned approximately the same as the case 201.

[0218] Furthermore, the air cleaner 261 is positioned at a height corresponding to the bottom of the case 201 in the vertical direction. To the left of the air cleaner 261 are the central front-rear extension frame 81, support bracket 95, support plate 96, etc.

[0219] The air cleaner 261 is supported by a support bracket 95 by a support bracket 266 that extends diagonally upward to the right from the front of the support bracket 95 (see Figure 10). The support bracket 266 is a plate-shaped member having a predetermined bent shape, and its lower side is fixedly supported to the support surface portion 95a of the support bracket 95 by bolts or the like. The support bracket 266 is fixed to the air cleaner 261 by bolts or the like, while aligning with a planar mounting surface formed on the upper left side of the peripheral wall portion of the air cleaner 261.

[0220] The downstream end of the air intake pipe 263 is connected to the right-side portion of the front of the air cleaner 261. The air intake pipe 263 has a vertical portion 263a extending upward from the front of the air cleaner 261, an inclined portion 263b extending diagonally upward and to the right rear from the upstream side of the vertical portion 263a, and an upper end portion 263c rising vertically from the upstream side of the inclined portion 263b (see Figure 24). A roughly cylindrical pre-cleaner 262 is provided above the upper end portion 263c of the air intake pipe 263.

[0221] The air intake pipe 263 is provided to pass between the first support rod 221 and the second support rod 222, and in the vertical direction, the upper side of the inclined portion 263b extends above the cover support frame 120 which forms the upper surface of the exhaust gas purification device 30. Therefore, the pre-cleaner 262 is provided at a higher position than the exhaust gas purification device 30.

[0222] As shown in Figure 7, the downstream air intake pipe 265 extends downward from the front of the roughly cylindrical outer shape of the air cleaner 261, passes under the lateral frame 61, and extends diagonally downward and to the right front towards the right front position of the engine 11, passing under the air inlet pipe 205 and communicating with the compressor side of the supercharger 40.

[0223] With the engine 11's intake system configuration as described above, the DPF case 31 and SCR case 32 are positioned vertically above and below the left rear upper part of the engine 11, and the air cleaner 261 and pre-cleaner 262 are positioned vertically above and below the right rear upper part of the engine 11. In other words, the exhaust gas purification device 30 (DPF case 31 and SCR case 32), which receives the connection of the exhaust pipe 41 extending rearward from the exhaust turbine side (left side) of the turbocharger 40 located at the front of the engine 11, and the air cleaner 261 and pre-cleaner 262 positioned above it, which receive the connection of the downstream intake pipe 265 extending rearward from the compressor side (right side) of the turbocharger 40, are positioned on the left and right sides above and below the rear of the engine 11.

[0224] Furthermore, in the arrangement of the intake system of the engine 11, the intake pipe 263, which connects the air cleaner 261 and the pre-cleaner 262 to each other, is supported by a pipe support rod 270, which extends from the intercooler 200 and serves as a support. The pipe support rod 270 is made up of a substantially straight rod-shaped member and is installed between the intake pipe 263 and the intercooler 200.

[0225] As shown in Figure 24, the pipe support rod 270 has a rectangular plate-shaped lower mounting plate portion 271 at its lower end. The lower mounting plate portion 271 is provided by fixing a plate-shaped member to the outer circumferential surface of a rod-shaped member that forms the main body of the pipe support rod 270 by welding or the like.

[0226] The pipe support rod 270 has its lower mounting plate portion 271 fixed to the upper part of the rear surface portion 201e of the case 201 at two points, top and bottom, by bolts 272. The bolts 272 pass through the lower mounting plate portion 271 and are screwed into nuts provided on the inside of the rear surface portion 201e. The fixing portion of the lower end of the pipe support rod 270 to the case 201 is located near the right side of the fixing portion of the first support rod 221 to the case 201.

[0227] The pipe support rod 270 extends vertically upward from the fixing portion to the case 201, and has a bent portion 270a at its upper end that bends at an obtuse angle to the vertical portion to form a fixing portion to the air supply pipe 263. A rectangular plate-shaped upper mounting plate portion 273 is provided on the bent portion 270a. The upper mounting plate portion 273 is provided by fixing a plate-shaped member to the outer circumferential surface of a rod-shaped member that forms the main body portion of the pipe support rod 270 by welding or the like.

[0228] On the other hand, a base portion 275 is provided on the right outer surface of the upper part of the inclined portion 263b of the air supply pipe 263 to support and fix the upper end of the pipe support rod 270. The base portion 275 is provided by fixing a roughly U-shaped bent plate-like metal fitting, which is bent at right angles with both ends serving as legs, to the inclined portion 263b by welding or the like, with the leg sides facing the outer surface of the inclined portion 263b. In the base portion 275, the surface between the two legs becomes a support surface spaced apart from the outer surface of the inclined portion 263b.

[0229] The pipe support rod 270 is fixed to the base portion 275 at two points by bolts 276, with the upper mounting plate portion 273 overlapping the support surface portion of the base portion 275. The bolts 276 pass through the upper mounting plate portion 273 and the support surface portion of the base portion 275 and are screwed into nuts 277 provided on the back side of the support surface portion of the base portion 275.

[0230] As described above, the pipe support rod 270 has one end, the lower end, fixedly supported to the case 201 of the intercooler 200, and the other end, the upper end, fixedly supported to the inclined portion 263b of the air intake pipe 263. In this way, the air intake pipe 263 is supported by the pipe support rod 270 relative to the case 201.

[0231] According to the combine harvester 1 of this embodiment, which has the above configuration, the following effects and advantages can be obtained.

[0232] According to the combine harvester 1 of this embodiment, the space of the machine can be used effectively, the exhaust gas purification device 30 can be installed compactly, and an excellent weight balance can be obtained.

[0233] Regarding the arrangement of the exhaust gas purification device 30, the DPF case 31 and SCR case 32 are arranged in two tiers, with the longitudinal direction being the front-to-back direction, behind the driver's unit 12 above the engine 11 and to the right of the threshing unit 6. With this configuration, the DPF case 31 and SCR case 32 can be compactly arranged by utilizing the space to the right of the threshing unit 6 at the rear of the cabin 20. This makes the combine harvester 1 more compact. Furthermore, since the heavy engine 11 and exhaust gas purification device 30 are arranged front-to-back at the front of the machine, a favorable arrangement can be obtained in terms of the weight balance of the machine.

[0234] Furthermore, the combine harvester 1 includes a support frame 60 that supports the driver's unit 12, a connecting frame 80 that supports the support frame 60 on the driver's unit 25, and a support frame 90 that supports the DPF case 31 and SCR case 32 on the connecting frame 80, as a support configuration for the DPF case 31 and SCR case 32 on the machine base 25. With this configuration, it is possible to firmly support the exhaust gas purification device 30 while housing it compactly. In addition, by using the support frame 60 that supports the driver's unit 12 as the support configuration for the exhaust gas purification device 30, the existing configuration can be utilized, and the space on the traveling machine body 4 can be effectively used.

[0235] Furthermore, the combine harvester 1 is equipped with a cover support frame 120 that supports the support frame 90 on the threshing section 6 side as a support configuration for the DPF case 31 and SCR case 32. With this configuration, the exhaust gas purification device 30 can be housed compactly, while the threshing section 6 can be used to more firmly support the DPF case 31 and SCR case 32 which are arranged vertically.

[0236] Furthermore, the DPF case 31 and SCR case 32 are positioned on the threshing section 6 side relative to the support frame 90. This configuration allows the exhaust gas purification device 30 to be housed compactly. In addition, the support structure for the DPF case 31 and SCR case 32 allows for easy placement of the support parts relative to the threshing section 6.

[0237] Furthermore, the urea mixing pipe 45 of the exhaust gas purification device 30 is positioned on the threshing section 6 side relative to the DPF case 31 and SCR case 32. With this configuration, the exhaust gas purification device 30 can be housed compactly. In particular, in a configuration in which the urea mixing pipe 45 is arranged along the longitudinal direction of the DPF case 31 and SCR case 32, by positioning the urea mixing pipe 45 at an intermediate height between the vertically positioned DPF case 31 and SCR case 32, space for the urea mixing pipe 45 can be easily secured, and the exhaust gas purification device 30 can be effectively made more compact.

[0238] Furthermore, in the urea mixing tube 45, control harnesses and piping for supplying urea water are connected to the urea injection unit 48. By positioning the urea mixing tube 45 on the threshing unit 6 side in the exhaust gas purification device 30, the threshing unit 6 can be used as a support for the harnesses and piping. This makes it possible to easily support the harnesses and piping connected to the urea mixing tube 45 using the threshing unit 6 without providing separate support structures.

[0239] Furthermore, the urea water supply device 50, which supplies urea water to the urea mixing tube 45, is supported by the rear central support column 82 of the connecting frame 80 that forms the support structure for the DPF case 31 and the SCR case 32. With this configuration, the support structure for the DPF case 31 and the SCR case 32 and the support structure for the urea water supply device 50 can be shared, and the device configuration on the machine base 25 can be compactly housed.

[0240] Furthermore, an upper support column 140 is provided above the central front-rear extension frame 81 of the connecting frame 80, and a lock pin member 181, which constitutes the locking device 180 of the grain tank 7, is provided on the upper support column 140. With this configuration, the locking device 180 can be provided using the support configuration of the DPF case 31 and the SCR case 32, eliminating the need to provide a separate locking device 180, allowing the equipment configuration on the machine base 25 to be compactly arranged, and the stored state of the grain tank 7 to be firmly maintained.

[0241] According to the combine harvester 1 of this embodiment, the space of the machine can be used effectively, the exhaust gas purification device 30 can be installed compactly, and the exhaust gas purification device 30 and the intercooler 200 can be easily accessed, resulting in good maintainability.

[0242] In other words, the DPF case 31 and SCR case 32 of the exhaust gas purification device 30 and the intercooler 200 located to the right of the exhaust gas purification device 30 are positioned behind the cabin 20 having the driver's unit 12, facing each other in the left-right direction with space between them.

[0243] With this configuration, an open space is formed between the exhaust gas purification device 30 and the intercooler 200, improving access to both the exhaust gas purification device 30 and the intercooler 200, and making maintenance easier. In particular, maintenance of the intercooler 200 can be improved from the left side portion 201c of the case 201.

[0244] Furthermore, the intercooler 200 has a fan 240 that can blow air toward the exhaust gas purification device 30. With this configuration, cooling air can be sent from the intercooler 200 to the exhaust gas purification device 30, so that the unit itself can be made compact while still providing a cooling effect, and preventing the exhaust gas purification device 30 from becoming overheated.

[0245] Furthermore, the fan 240 is configured to rotate in both forward and reverse directions. This configuration makes it possible to remove dust adhering to the intercooler 200. Specifically, when the fan 240 rotates in the forward direction to blow air toward the exhaust gas purification device 30, dust from the atmosphere adheres to the dust screen 201g, which is adjusted to the right side of the case 201, the intake side of the outside air. However, by rotating the fan 240 in the reverse direction, air can be blown onto the dust screen 201g from the inside of the case 201, thereby blowing away and removing the dust adhering to the dust screen 201g. This ensures good ventilation when the fan 240 blows air.

[0246] Furthermore, the exhaust gas purification device 30 and the intercooler 200 are supported by a support frame 60 that supports the driver's unit 12 via the cabin 20. Specifically, the exhaust gas purification device 30 is supported on a central front-rear extension frame 81 that extends rearward from the left-right middle section of the horizontal frame 61 that supports the cabin 20, and the intercooler 200 is supported on a front-rear extension frame 62 that extends rearward from the right end of the horizontal frame 61.

[0247] This configuration allows for a compact installation of the exhaust gas purification device 30 while providing robust support for both the exhaust gas purification device 30 and the intercooler 200. Furthermore, by using the support frame 60 that supports the driver unit 12 as the support structure for the intercooler 200, existing configurations can be utilized, allowing for effective use of space on the traveling body 4.

[0248] Furthermore, the combine harvester 1 has a support structure for the exhaust gas purification device 30 and the intercooler 200, which includes a connecting frame 80 that supports the exhaust gas purification device 30 and front and rear extension frames 62 that support the intercooler 200, with these frames connected by a transverse frame 61. With this configuration, it is possible to firmly support the exhaust gas purification device 30 and the intercooler 200 while making effective use of the space on the traveling body 4.

[0249] Furthermore, the intercooler 200 is supported by the exhaust gas purification device 30 side by a first support rod 221 and a second support rod 222, which are installed between the intercooler 200 and the frame portion that supports the exhaust gas purification device 30. With this configuration, it is possible to firmly support the intercooler 200 by utilizing the support structure of the exhaust gas purification device 30 on the machine base portion 25.

[0250] In particular, the support structure using the first support rod 221 and the second support rod 222 prevents the intercooler 200 from swaying from side to side or tipping over, and allows the intercooler 200 to be firmly supported on the front-to-rear extension frame 62. From the viewpoint of firmly supporting the intercooler 200, it is preferable that the support position of the intercooler 200 by the first support rod 221 and the second support rod 222 be at the top of the case 201.

[0251] Furthermore, the combine harvester 1 has a configuration in which an air intake pipe 263, which connects an air cleaner 261 and a pre-cleaner 262 provided for the engine 11 to each other, is supported by a pipe support rod 270 relative to the intercooler 200. With this configuration, the air intake pipe 263 can be supported relative to the intercooler 200 which is firmly supported on the machine base 25, making it possible to firmly support the air intake pipe 263 and pre-cleaner 262 which extend upward from the air cleaner 261.

[0252] Furthermore, the air cleaner 261 is positioned between the exhaust gas purification device 30 and the intercooler 200, which are facing each other, with the central axis of its cylindrical outer shape oriented in the front-to-back direction. With this configuration, the space between the exhaust gas purification device 30 and the intercooler 200 can be effectively utilized to compactly position the air cleaner 261.

[0253] Furthermore, the air cleaner 261 is provided supported by a support bracket 266 on a support bracket 95 that supports the exhaust gas purification device 30. With this configuration, it is possible to firmly support the air cleaner 261 by utilizing the support structure of the exhaust gas purification device 30, without having to provide a separate support structure for the air cleaner 261 on the machine base 25.

[0254] Furthermore, the intercooler 200 is positioned above the radiator 14, which is located to the right of the engine 11. With this configuration, even if the width of the engine 11 is increased, the intercooler 200 can be compactly positioned without increasing the width of the vehicle body 4.

[0255] Furthermore, in a rear view, the sloping portion 145 of the threshing section 6 is aligned with the direction in which the DPF outlet pipe 42 extends diagonally upward to the left from the rear portion 31b of the DPF case 31 (see Figure 16). With this configuration, the DPF case 31 can be housed in the space to the right of the sloping portion 145 of the threshing section 6, and the urea mixing pipe 45, located to the upper left of the DPF case 31, can be positioned in the open space above the sloping portion 145 of the threshing section 6. This improves accessibility to the urea mixing pipe 45 and provides good maintainability for the urea mixing pipe 45.

[0256] The above-described embodiments are merely examples of the present invention, and the combine harvester according to the present invention is not limited to the above-described embodiments. Therefore, it goes without saying that various modifications can be made to the design, etc., even to embodiments other than those described above, as long as they do not depart from the technical spirit of the present invention.

[0257] In the embodiment described above, the DPF case 31 is located on the lower side and the SCR case 32 is located on the upper side, but their arrangement may be reversed. However, from the viewpoint of shortening the pipeline from the engine 11 to the DPF case 31 to prevent a drop in exhaust gas temperature and ensure the processing performance of the exhaust gas purification device 30, a configuration in which the DPF case 31, which receives the inflow of exhaust gas from the engine 11, is located on the lower side is preferred, as in the embodiment described above.

[0258] Furthermore, in the above-described embodiment, the support member installed between the exhaust gas purification device 30 and the intercooler 200 consists of two support rods, a first support rod 221 and a second support rod 222. However, the configuration of the support member is not particularly limited. The support member may be made of, for example, a plate-shaped member, angle steel, or square steel pipe. However, by using a first support rod 221 and a second support rod 222 as the support member, as in the above-described embodiment, the support member can be made compact, and the space between the exhaust gas purification device 30 and the intercooler 200 can be effectively utilized. [Explanation of Symbols]

[0259] 1 combine harvester 4. Mobile Unit 6. Threshing section 7. Grain tank (grain storage section) 11 Engine 12. Driver's Unit 20 cabins 25 Machine base 30 Exhaust gas purification device 31 DPF Case (Case 1) 32 SCR cases (Case 2) 41 Exhaust pipe 41c Flexible pipe 45 Urea mixing tube 50 Urea water supply equipment 55 Urea injection controller 60 Support Frame 61 Horizontal frame (connecting member) 62. Front and rear extension frame (second support frame) 80 Connecting frame (first support frame) 90 Support frame (fixing member) 120 Cover support frame (support member) 135 First support plate (frame section) 140 Upper support column (extension frame) 180 Locking device 181 Lock pin component (locking component) 200 Intercooler (Heat Exchanger) 221 First support rod (erectile component) 222 Second support rod (erectile component) 240 fans 250 Controllers 261 Air Cleaner 262 Pre-cleaner 263 Air intake pipe 270 Piping support rod (support)

Claims

1. A combine harvester with the engine located at the front of the vehicle, The exhaust gas purification device comprises a first case for removing particulate matter from the exhaust gas of the engine, and a second case for removing nitrogen oxides from the exhaust gas of the engine. The first and second cases are arranged vertically with their longitudinal direction as the front-to-back direction, and are positioned above the engine. A combine harvester characterized by the following features.

2. The engine is equipped with an exhaust pipe for discharging exhaust gases from the engine, The exhaust pipe extends upward from the engine and is connected to the first case. The combine harvester as described in feature 1.

3. At least a portion of the exhaust pipe is made of a flexible pipe. The combine harvester according to feature 2.

4. At least one of the first case and the second case is positioned so as to overlap at least a portion of the threshing section, which is located on the traveling machine, when viewed from above. A combine harvester according to any one of claims 1 to 3.

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