JP2010084542A - Combined harvester and thresher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined harvester and thresher having exhausting structure effectively utilizing a space formed to the combined harvester and thresher and easily improving efficiency of exhaust gas cleaning. <P>SOLUTION: The combined harvester and thresher has a traveling machine body 1 mounting a diesel engine 20 thereon, a threshing device 5, and a grain tank 7. The combined harvester and thresher has an exhaust pipe 91 extending downward between the threshing device 5 and the grain tank 7, a DPF 65, and a NO<SB>x</SB>catalyst 68. The DPF 65 is disposed between the exhaust manifold 64 of the diesel engine 20 and the tail pipe 69 of the exhaust pipe 91. The NO<SB>x</SB>catalyst 68 is disposed between the DPF 65 and the tail pipe 69. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an exhaust structure for exhausting exhaust gas from a combine equipped with a diesel engine.

2. Description of the Related Art Conventionally, in a work vehicle such as a tractor equipped with a diesel engine, a configuration including an exhaust gas purification device such as a diesel particulate filter (DPF) or a NOx catalyst is known for purifying exhaust gas generated by the diesel engine. . Patent Document 1 discloses a work vehicle provided with this type of exhaust gas purification device.
JP 2008-31955 A

  Compared to a tractor or the like, a combine in a work vehicle is configured to include various devices such as a reaping device, a threshing device, and a glen tank, and therefore places where the exhaust gas purification device is disposed are limited. As a method of arranging the exhaust gas purification device so as not to interfere with each device of the combine, the exhaust pipe of the diesel engine is extended and the exhaust gas purification device is arranged on the upper side of the threshing device or the lower side of the traveling machine body. Configuration etc. can be considered. However, when the exhaust gas purifying device is disposed above the threshing device or below the traveling machine body, the support structure for supporting the exhaust gas purifying device is complicated, which may increase the number of parts. For this reason, there is room for improvement from the viewpoint of efficiently arranging the exhaust gas purification device by utilizing the space formed in the combine.

  Further, when exhaust gas is purified by a diesel particulate filter (DPF) that needs to keep the temperature of the catalyst at a constant high temperature, it is necessary to maintain the temperature of each part of the purification device at a high temperature. However, it is difficult to maintain the temperature of the exhaust gas purification device in a high temperature state in the configuration in which the exhaust gas purification device is disposed on the upper side of the threshing device as described above or on the lower side of the traveling machine body. In particular, when the combine is operated in a place where the temperature environment is severe such as a cold region, it is difficult to keep the temperature of the DPF catalyst in an appropriate state and to effectively perform the purification treatment function.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an exhaust structure that can effectively use the space formed in the combine and can easily improve the efficiency of exhaust gas purification. Is to provide a combine.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the viewpoint of this invention, the combine comprised as follows is provided. That is, the combine includes a traveling machine body equipped with a diesel engine, a reaping device, a threshing device, and a Glen tank. The combine includes an exhaust pipe extending downward between the threshing device and the Glen tank, and a diesel particulate filter that collects particulate matter in the exhaust gas of the diesel engine. The diesel particulate filter is disposed between the exhaust manifold of the diesel engine and the tail pipe of the exhaust pipe.

  Thereby, since the exhaust structure from the exhaust manifold to the tail pipe can be installed using the space between the threshing device and the Glen tank, the threshing device, the Glen tank and the exhaust pipe can be arranged in a compact manner. . Moreover, since an exhaust pipe is arrange | positioned so that it may pass between a threshing apparatus and a Glen tank, each part of a diesel engine can be arrange | positioned easily, without making it interfere with an exhaust structure. Further, a support structure for supporting each part of the diesel particulate filter and the diesel engine can be easily formed by using an exhaust pipe or the like. Furthermore, the diesel particulate filter can be disposed at a position close to the diesel engine. In this case, the heat of the diesel engine can be used to efficiently maintain the catalyst at a high temperature. Therefore, the purification function of the diesel particulate filter is improved, and the exhaust gas purification function can be effectively exhibited even when the combine is operated in a severe temperature environment such as a cold region.

  In the combine, it is preferable that a NOx catalyst for reducing nitrogen oxides in exhaust gas of the diesel engine is disposed in an exhaust path between the diesel particulate filter and the tail pipe.

  Thereby, a NOx catalyst can be installed compactly using the space between a grain tank and a threshing apparatus. Moreover, the support structure with the high rigidity for supporting a NOx catalyst can be formed by utilizing each part of a threshing apparatus and each part of a Glen tank.

  In the above combine, it is preferable that the diesel particulate filter and the NOx catalyst are arranged with a first cereal cylinder for conveying the first thing sandwiched in the front-rear direction in a side view.

  Thereby, the space in the left-right direction necessary for the diesel particulate filter and the NOx catalyst can be reduced, and the configuration for purifying the exhaust gas can be configured more compactly.

  In the combine, it is preferable that a silencer is disposed in an exhaust path between the diesel particulate filter and the tail pipe.

  Thereby, the structure which reduces the discharge | emission sound of exhaust gas can be arrange | positioned compactly using the space between a grain tank and a threshing apparatus. Moreover, since it is the structure which attaches a silencer to the exhaust pipe of the shape extended below, it becomes easy to arrange | position a silencer in a low position. As a result, the space below the combine can be used effectively.

  In the combine, it is preferable that an exhaust gas exhaust port formed in the tail pipe is disposed below the traveling machine body.

  Thereby, the soot and dust adhering to the structure below the traveling machine body can be removed by the wind pressure of the exhaust gas discharged from the outlet of the tail pipe.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In the following description, “left side”, “right side”, and the like simply mean the left side and the right side in the direction in which the combine moves forward. FIG. 1 is a side view showing the entire combine from the left side of the combine according to the embodiment of the present invention. FIG. 2 is a side view showing the entire combine from the right side of the combine. FIG. 3 is a plan view of the combine.

  As shown in FIGS. 1, 2, and 3, the combine according to the present embodiment includes a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 (traveling portions). At the front part of the traveling machine body 1, there is arranged a cutting device 3 for four-line cutting that harvests cereal grains. This reaping device 3 is mounted on the traveling machine body 1 so as to be adjustable up and down around the harvesting rotation fulcrum shaft 4a by a single-acting lifting hydraulic cylinder 4. A threshing device 5 having a feed chain 6 and a grain tank 7 for storing grain after threshing are mounted on the traveling machine body 1 side by side. The threshing device 5 is disposed on the left side in the forward direction of the traveling machine body 1, and the Glen tank 7 is disposed on the right side in the forward direction of the traveling machine body 1 (see FIG. 3). A grain discharge auger 8 for discharging the grains in the grain tank 7 to the outside of the machine body is disposed in the grain tank 7.

  A driving unit 10 is provided at the front right side of the traveling machine body 1. The driving unit 10 in front of the Glen tank 7 is provided with an operating device including a step 11 on which the operator gets on, a driver's seat 12, a steering handle 13, various operating levers, and the like. A diesel engine 20 as a power source is disposed in the traveling machine body 1 below the driver seat (seat) 12.

  As shown in FIGS. 1 and 2, left and right track frames 21 are arranged on the lower surface side of the traveling machine body 1. The track frame 21 is provided with a drive sprocket 22, a tension roller 23, and a plurality of track rollers 24. The drive sprocket 22 is for transmitting the power of the diesel engine 20 to the traveling crawler 2. The tension roller 23 is for maintaining the tension of the traveling crawler 2. The track roller 24 is for holding the grounding side of the traveling crawler 2 in a grounded state. The driving sprocket 22 supports the front side of the traveling crawler 2, the tension roller 23 supports the rear side of the traveling crawler 2, and the track roller 24 supports the grounding side of the traveling crawler 2.

  As shown in FIGS. 1 and 2, the cutting frame 9 is connected to the cutting rotation fulcrum shaft 4 a of the cutting device 3. The reaping device 3 includes a cutting blade device 47, a culm pulling device 48, a culm conveying device 49, and a weed body 50. The cutting blade device 47 is for cutting the stock of uncut cereal grains in the field, and is composed of a clipper type. The grain raising apparatus 48 is for causing uncut grain grains in the field, and is configured to correspond to four lines in this embodiment. The cereal masher 49 is for conveying the reaped cereals harvested by the cutting blade device 47. The weed body 50 is for weeding the uncut cereal grains in the field into four pieces. A cutting blade device 47 is provided below the cutting frame 9. Further, a grain raising device 48 is disposed in front of the cutting frame 9. Between the grain raising apparatus 48 and the front end portion (feed start end side) of the feed chain 6, a grain production device 49 is arranged. A weeding body 50 projects from the lower part of the grain raising device 48. While the traveling crawler 2 is driven by the diesel engine 20 to move in the field, the reaping device 3 is driven to continuously shave the uncut grain culm on the field.

  As shown in FIGS. 1 and 2, the threshing device 5 includes a handling cylinder 26 for threshing threshing, a swing sorter 27, a tang fan 28, a processing cylinder 29, a dust exhaust fan 30, Is provided. The swing sorting board 27 is configured as a swing sorting mechanism that sorts out the fallen particles falling below the handling cylinder 26. The tang fan 28 is for supplying the sorting wind to the swing sorter 27. The processing cylinder 29 is for reprocessing the threshing discharge taken out from the rear part of the handling cylinder 26. The dust exhaust fan 30 is for discharging dust at the rear part of the swing sorter 27 to the outside of the machine.

  As shown in FIGS. 1 to 3, a waste chain 34 is disposed on the rear end side (feed end side) of the feed chain 6. The waste inherited from the rear end side of the feed chain 6 to the waste chain 34 is discharged to the rear of the traveling machine body 1 in a long state, or by a waste cutter 35 provided on the rear side of the threshing device 5. After being cut to a suitable short length, it is discharged to the rear lower side of the traveling machine body 1. As used herein, “reduction” refers to reeds whose grains have been threshed.

  Below the swing sorter 27, a first conveyor 31 for picking up the grain (the first sort) selected by the swing sorter 27 and a second sort such as a grain with a branch raft are taken out. A second conveyor 32 is provided. In the present embodiment, the traveling machine body 1 is horizontally provided on the upper surface side of the traveling machine body 1 in a side view in order of the first conveyor 31 and the second conveyor 32 from the front side in the traveling direction.

  As shown in FIGS. 1 to 3, the swing sorter 27 is configured to swing sort (specific gravity sort) the cereal grains that have fallen below the handling cylinder 26. The grain that has fallen from the rocking sorter 27 (the first sort) is removed from the grain by the sorting wind from the tang fan 28 and falls first onto the conveyor 31. A first cereal cylinder 33 extending in the vertical direction is connected to a terminal portion of the first conveyor 31 that protrudes outward from one side wall (in the embodiment, the right side wall) of the threshing device 5 that is close to the grain tank 7. Yes. The grain taken out from the first conveyor 31 is carried into the Glen tank 7 by a first cereal conveyor (not shown) in the first cereal cylinder 33 and collected in the Glen tank 7.

  Oscillating sorter 27 is the second conveyor for second sorts such as grain with branches and stems (reduction reprocessed product for resorting in which grain and sawdust etc. are mixed) by swing sorting (specific gravity sorting). It is comprised so that it may fall to 32. The second sorting product taken out by the second conveyor 32 is returned to the upper surface side of the swing sorting board 27 via the second reduction cylinder 36 and the second processing unit 37 and is again sorted. Further, sawdust, dust, and the like in the crushed material from the handling drum 26 are discharged toward the farm field from the rear part of the traveling machine body 1 by the sorting wind from the Kara fan 28.

  Next, the diesel engine 20 will be described with reference to FIGS. 4 and 5. FIG. 4 is a side view showing the positional relationship among the exhaust structure of the diesel engine, the glen tank, and the threshing device from the left side of the combine. FIG. 5 is a plan view showing the positional relationship among the exhaust structure of the diesel engine, the glen tank, and the threshing device.

  As shown in FIG. 4, the diesel engine 20 is disposed in an engine room 79 that is partitioned by a wall (not shown) inside the combine. The engine room 79 is disposed below the driver seat 12, and the diesel engine 20 is fixed in the engine room 79 by a frame (not shown). In the present embodiment, the frame forming the step 11 for the operator to place his / her foot is adjacent to a part of the front surface of the engine room 79.

  The diesel engine 20 will be described. The diesel engine 20 includes a cylinder block (not shown) having a cylinder head 60 fastened to the upper surface. As shown in FIG. 5 and the like, a turbocharger 61 is attached to the cylinder head 60. The turbocharger 61 is disposed on the rear surface side of the diesel engine 20 at a high position of the diesel engine 20, and includes a turbine case 62 having a turbine wheel (not shown) and a blower wheel (not shown). And a compressor case 63.

  As shown in FIG. 4, an output shaft 83 projects leftward from the diesel engine 20, and a flywheel 84 is provided on the output shaft 83. The flywheel 84 is fixed with a working unit driving pulley 85 that transmits driving force to the reaping device 3 and the threshing device 5, and a traveling driving pulley 87 that transmits driving force from the transmission case 86 to the traveling crawler 2. An output unit is configured.

  As shown in FIG. 5, a water-cooling radiator 76 for the diesel engine 20 and an air-cooling cooling fan 77 for the diesel engine 20 are arranged on the right side of the diesel engine 20. The cooling fan 77 is disposed on the right side of the engine room 79 in which the diesel engine 20 is installed.

  Next, the intake structure of the diesel engine 20 will be described. As shown in FIGS. 4 and 5, the air supply / discharge side of the air cleaner 71 is connected to the air supply intake side of the compressor case 63 via an air supply pipe. An air supply intake side of the air cleaner 71 is connected to the precleaner 72 through an air supply duct 73. An air supply manifold 75 is disposed on the front side of the cylinder head 60, and the air supply manifold 75 is connected to the air supply / discharge side of the compressor case 63 via a supercharging pipe 74. That is, outside air sucked into the air cleaner 71 from the precleaner 72 is removed by the air cleaner 71 and then supplied from the air supply manifold 75 to each cylinder of the diesel engine 20.

  Next, the exhaust structure of the diesel engine 20 will be described. As shown in FIGS. 4 and 5, an exhaust manifold 64 is disposed behind the cylinder head 60 and on the rear surface side of the diesel engine 20. Exhaust gas discharged by the diesel engine 20 is discharged from the exhaust manifold 64 to the outside of the machine by an exhaust structure that is arranged utilizing the space on the rear surface side of the diesel engine 20. This exhaust structure includes an exhaust pipe 91, a DPF portion 65 having a diesel particulate filter (hereinafter referred to as DPF), a NOx catalyst portion 68, and a silencer (silencer) 90 as main components.

  The exhaust pipe 91 includes a first connection pipe 92, a second connection pipe 93, a third connection pipe 94, and a tail pipe 69, and passes between the threshing device 5 and the glen tank 7. It is configured to extend toward the lower surface side of the traveling machine body 1. The DPF section 65 is for collecting particulate matter (PM) in the exhaust gas, and the NOx catalyst section 68 is for reducing nitrogen oxide (NOx) in the exhaust gas to make it harmless. It is. The silencer 90 is for attenuating exhaust noise generated when exhaust gas is discharged. The configurations of the DPF unit 65 and the NOx catalyst unit 68 will be described later. Hereinafter, the exhaust structure will be described from the upstream side to the downstream side according to the exhaust gas discharge direction.

  As shown in FIG. 4, the turbine case 62 is located above the exhaust manifold 64. The exhaust manifold 64 is connected to the exhaust gas intake side of the turbine case 62, while the exhaust gas inflow side (front side) of the DPF portion 65 is connected to the exhaust gas discharge side (left side) of the turbine case 62 via the first connection pipe 92. ) Is connected. The first connection pipe 92 is formed in an approximately L shape in plan view shown in FIG. 5, and connects the turbine case 62 and the DPF portion 65 on the rear surface side of the diesel engine 20. The exhaust gas inflow side (upper side) of the NOx catalyst unit 68 is connected to the exhaust gas discharge side (rear side) of the DPF unit 65 via the second connection pipe 93.

  The second connection pipe 93 is configured to bend downward after extending backward from the exhaust gas discharge side (rear side) of the DPF portion 65 in a side view shown in FIG. 4. In addition, the second connection pipe 93 is configured to extend backward from the exhaust gas discharge side of the DPF portion 65 to the left so as to avoid the first cereal cylinder 33 in the plan view shown in FIG. Yes. Thus, the 2nd connection pipe 93 is comprised so that it may go to the back lower part, curving to the left side so that the top grain cylinder 33 may be avoided. The NOx catalyst unit 68 is disposed behind the DPF unit 65 (on the rear surface side of the diesel engine 20) and lower than the DPF unit 65, and is connected to the DPF unit 65 by the second connection pipe 93. The The exhaust gas inflow side (front side) of the silencer 90 is connected to the exhaust gas discharge side (lower side) of the NOx catalyst portion 68 via a third connection pipe 94.

  The third connecting pipe 94 extends downward from the exhaust gas discharge side (lower side) of the NOx catalyst unit 68, then passes through the bottom of the traveling machine body 1 and bends backward on the lower surface side of the traveling machine body 1. It is comprised and is substantially L-shaped in the side view shown in FIG. The silencer 90 is disposed behind the NOx catalyst portion 68 and on the lower surface side of the traveling machine body 1, and is connected to the NOx catalyst portion 68 through the third connection pipe 94. With this configuration, the silencer 90 can be disposed at a position where the combine is low, and the space on the lower surface side of the traveling machine body 1 can be effectively utilized. As shown in FIGS. 4 and 5, a tail pipe 69 is connected to the exhaust gas discharge side (rear side) of the silencer 90.

  As shown in FIGS. 4 and 5, the tail pipe 69 protrudes rearward from the discharge side (rear side) of the silencer 90, and a discharge port 69 a is formed at the end portion of the tail pipe 69. The discharge port 69a is opened so as to face obliquely rearward and upward, and the opening faces the lower surface side of the traveling machine body 1.

  In the present embodiment, since the exhaust manifold 64 and the turbine case 62 (turbo supercharger 61) are arranged on the rear surface side of the diesel engine 20, the first connection pipe 92 that connects the turbine case 62 and the DPF portion 65 is provided. The configuration can be made short and simple. As a result, the DPF portion 65 is disposed in the vicinity of the diesel engine 20, and the exhaust path from the exhaust manifold 64 to the DPF portion 65 can be formed easily and compactly without causing the diesel engine 20 to circulate. Moreover, since the DPF part 65 is arrange | positioned in the vicinity of the diesel engine 20, the heat which arises when the diesel engine 20 is driven can be utilized efficiently for the temperature maintenance of the catalyst of the DPF part 65. Furthermore, since the exhaust path to the DPF unit 65 is configured in a compact manner, the exhaust structure does not hinder the arrangement of the turbocharger 61 and the like.

  As shown in FIGS. 4 and 5, the exhaust structure of the present embodiment advances from the front to the rear as the exhaust manifold 64, the first connection pipe 92, the DPF portion 65, the second connection pipe 93, the NOx catalyst portion 68, The three connecting pipes 94, the silencer 90, and the tail pipe 69 are arranged in this order. Then, in the side view shown in FIG. 4 and the plan view shown in FIG. 5, the DPF portion 65 and the NOx catalyst portion 68 are shaped so as to sandwich the first cereal cylinder 33 in the front-rear direction. In other words, in a side view (FIG. 4), the DPF portion 65 is located on the front side of the first whipping cylinder 33 that is elongated in the vertical direction, and the NOx catalyst portion 68 is located on the rear side. Conventionally, a space has been formed between the threshing device 5 and the glen tank 7 for placing the first cereal cylinder 33 and the second reduction cylinder 36. The space other than the space for arranging the cylinder 36 was a dead space. In the present embodiment, by arranging a part of the exhaust path using the space that has become the dead space, the exhaust structure can be replaced with another device even in a configuration including various devices such as a combine. An efficient arrangement is possible without causing interference.

  The first connecting pipe 92, the second connecting pipe 93, and the third connecting pipe 94 that constitute the exhaust pipe 91 are fixed by a frame (not shown). This unillustrated frame is formed using each part of the threshing device 5, the side wall of the Glen tank 7, the traveling machine body 1, and the like. The DPF portion 65 is supported by a first connection pipe 92 and a second connection pipe 93 that are fixed by a frame (not shown), and the support structure for supporting the DPF portion 65 is special. It is easily formed without requiring a bracket or the like.

  The NOx catalyst unit 68 is fixed in such a manner as to be sandwiched between the threshing device 5 and the glen tank 7 using each part of the threshing device. For example, by using the casing of the first cereal cylinder 33 and the casing of the second reduction cylinder 36 to fix a bracket for supporting the NOx catalyst unit 68, the support structure of the NOx catalyst unit 68 can be simplified and It can be firmly configured. Thus, by configuring the support structure for the NOx catalyst unit 68 using each part of the threshing device 5, the NOx catalyst unit 68 can be reliably held stably. Therefore, it is possible to prevent the NOx catalyst portion 68 from being detached from the bracket due to vibration or impact during the traveling of the combine, and it is possible to suppress damage to the NOx catalyst portion 68, the second connection pipe 93, the third connection pipe 94, and the like. .

  The NOx catalyst unit 68 is used in a state where the catalyst is maintained at a high temperature in order to remove harmful substances. Therefore, the side plate of the threshing device 5 in the vicinity of the NOx catalyst unit 68 and the side plate of the grain tank 7 are heated by the NOx catalyst unit 68 in a high temperature state. By the way, in the combine, when moistening cereals (wet material) moistened by morning dew, etc., and mowing threshing, the moist material (e.g. cereal cocoons) adheres to the mouth of the threshing device 5, or the grain tank 7 The efficiency of harvesting may be compromised. However, in this embodiment, since the side plate of the threshing device 5 and the side plate of the grain tank 7 are heated by the NOx catalyst unit 68, a dehumidifying effect may be produced on the threshing device 5 and the wet material inside the grain tank 7. it can. Thus, by arranging the NOx catalyst unit 68 in the vicinity of the threshing device 5 and the grain tank 7, the heat of the NOx catalyst unit 68 is used to reduce the workability of the mowing work and the threshing work when handling the wet material. Can be suppressed.

  Next, the DPF unit 65 will be described with reference to FIG. FIG. 6 is a schematic diagram showing the internal structure of the DPF portion 65. The DPF unit 65 is for collecting particulate matter (PM) and the like in the exhaust gas. As shown in FIG. 6, the DPF portion 65 includes a DPF casing 100 made of a heat-resistant metal material, and substantially cylindrical filter cases 101 and 102 are built in the DPF casing 100. The filter cases 101 and 102 have a structure in which, for example, a diesel oxidation catalyst 103 such as platinum and a soot filter 104 that is a honeycomb filter body are arranged in series.

  Next, the NOx catalyst unit 68 will be described with reference to FIG. FIG. 7 is a schematic diagram showing the internal structure of the NOx catalyst unit 68. The NOx catalyst unit 68 is for reducing and detoxifying nitrogen oxides (NOx) in the exhaust gas. As shown in FIG. 7, the NOx catalyst unit 68 includes a NOx catalyst casing 106 made of a refractory metal material, and substantially cylindrical filter cases 107 and 108 are built in the NOx catalyst casing 106. The filter cases 107 and 108 have a structure in which the NOx removal catalyst 105 and the ammonia removal catalyst 109 are accommodated in series. As the NOx removal catalyst 105, a selective catalytic reduction catalyst using urea water as a reducing agent is used.

  Further, an unillustrated urea supply device composed of a urea supply tank device, a urea supply pump, and the like is disposed in the vicinity of the NOx catalyst unit 68. The urea supply device allows the urea aqueous solution to be introduced into the NOx catalyst unit 68. It is configured to be jettable. This urea supply device is arranged in an appropriate space of the combine. For example, the urea supply device is disposed in a space on the rear surface side of the diesel engine 20 or a space between the threshing device 5 and the glen tank 7.

  As the silencer 90, an appropriate one can be adopted as long as it is configured to attenuate the discharged sound. For example, a configuration in which a sound absorbing material is provided in the casing of the silencer 90 to change the shape of the exhaust gas passage, a configuration in which a partition is provided in the casing to form a plurality of spaces, and the like are applied to the silencer 90 of the present embodiment. Can do.

  With this configuration, the exhaust gas discharged from each cylinder of the diesel engine 20 to the exhaust manifold 64 is sent to the DPF unit 65 via the turbine case 62 and the first connection pipe 92, and PM is collected. Thereafter, the exhaust gas is sent to the NOx catalyst portion 68 through the second connection pipe 93, and the nitrogen oxides are rendered harmless. Further, the exhaust gas is sent to the silencer 90 through the third connection pipe 94, and the exhaust sound is attenuated. Finally, the exhaust gas is discharged from the discharge port 69 a of the tail pipe 69 connected to the silencer 90 to the lower surface side of the traveling machine body 1. In the present embodiment, since the discharge port 69a is disposed on the lower surface side of the traveling machine body 1, exhaust gas is discharged from the discharge port 69a toward the lower surface side of the traveling machine body 1. The wind pressure of the exhaust gas removes soot and mud adhering to the track frame 21 and the lower surface side of the traveling machine body 1.

  As described above, the combine according to the present embodiment is configured as follows. That is, the combine includes the traveling machine body 1 on which the diesel engine 20 is mounted, the reaping device 3, the threshing device 5, and the Glen tank 7. The combine is also provided with an exhaust pipe 91 extending downward between the threshing device 5 and the Glen tank 7 and a DPF unit 65 that collects particulate matter in the exhaust gas of the diesel engine 20. The DPF portion 65 is disposed between the exhaust manifold 64 of the diesel engine 20 and the tail pipe 69 of the exhaust pipe 91.

  Thereby, since the exhaust structure from the exhaust manifold 64 to the tail pipe 69 can be installed using the space between the threshing device 5 and the Glen tank 7, the threshing device 5, the Glen tank 7 and the exhaust pipe 91 can be made compact. Can be placed together. Moreover, since the exhaust pipe 91 is disposed so as to pass between the threshing device 5 and the Glen tank 7, each part of the diesel engine 20 can be easily disposed without interfering with the exhaust structure. Moreover, the support structure for supporting each part of the DPF part 65 and the diesel engine 20 can also be simply formed using the exhaust pipe 91 or the like. Furthermore, by disposing the DPF unit 65 at a position close to the diesel engine 20, the heat of the diesel engine 20 can be used to efficiently maintain the catalyst at a high temperature. Therefore, the purification function of the DPF unit 65 is improved, and the exhaust gas purification function can be effectively exhibited even when the combine is operated in a severe temperature environment such as a cold region.

  Further, in the combine of the present embodiment, the NOx catalyst unit 68 that reduces nitrogen oxides in the exhaust gas of the diesel engine 20 is disposed in the exhaust path between the DPF unit 65 and the tail pipe 69.

  Thereby, the NOx catalyst part 68 can be installed compactly using the space between the grain tank 7 and the threshing device 5. In addition, by using each part of the threshing device 5, a support structure having high rigidity for supporting the NOx catalyst part 68 can be easily formed. Further, by disposing the NOx catalyst unit 68 in the vicinity of the threshing device 5 and the grain tank 7, the heat in the threshing device 5 and the grain tank 7 can be heated using the heat of the NOx catalyst unit 68. The workability of reaping and threshing when handling wet materials can be improved.

  Moreover, in the combine of this embodiment, in the side view shown in FIG. 4, sandwiching the first cereal cylinder 33 for conveying the first thing in the front-rear direction, the DPF unit 65, the NOx catalyst unit 68, Is arranged.

  Thereby, the space in the left-right direction required for the DPF unit 65 and the NOx catalyst unit 68 can be reduced, and the configuration for purifying the exhaust gas can be configured more compactly.

  In the combine according to the present embodiment, the silencer 90 is disposed in the exhaust path between the DPF portion 65 and the tail pipe 69.

  Thereby, the structure which reduces the exhaust sound of exhaust gas can be arrange | positioned compactly using the space between the grain tank 7 and the threshing apparatus 5. FIG. Further, since the silencer 90 is attached to the exhaust pipe 91 having a shape extending downward, it is easy to place the silencer 90 at a low position. As a result, the space below the combine can be used effectively.

  Further, in the combine according to the present embodiment, an exhaust gas exhaust port 69 a formed in the tail pipe 69 is disposed below the traveling machine body 1.

  As a result, the dust attached to the track frame 21 and the like on the lower surface side of the traveling machine body 1 can be removed by the wind pressure of the exhaust gas discharged from the discharge port 69a of the tail pipe 69.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be further modified as follows.

  In the above embodiment, the DPF portion 65 is configured to be connected to the turbine case 62 via the first connection pipe 92 formed in an approximately L shape, but is not limited to this configuration, and the DPF The portion 65 can be disposed at an appropriate location in the exhaust path. For example, the DPF unit 65 may be connected from the turbine case 62 in a substantially directly connected state. However, it is preferable that the DPF portion 65 is disposed in the vicinity of the diesel engine 20 from the viewpoint of maintaining the temperature of the catalyst in a high temperature state.

  Further, the NOx catalyst unit 68 is not limited to the arrangement of the above embodiment, and can be arranged at an appropriate place as long as it is in the exhaust path. For example, the NOx catalyst unit 68 may be arranged in the vicinity of the diesel engine 20. In this case, it becomes easy to maintain the temperature of the catalyst of the NOx catalyst unit 68 at a high temperature.

  Moreover, although the silencer 90 of the said embodiment is a structure fixed on the lower surface side of the traveling body 1, it can be arrange | positioned in an appropriate place if it is in an exhaust path, such as fixing on the upper surface side of a traveling body. .

  Moreover, in the said embodiment, although the discharge port 69a of the tail pipe 69 is comprised so that it may face the lower surface side (back upper direction) of the traveling body 1, it is not limited to this structure, The structure of a discharge port is according to a situation. Can be changed as appropriate. For example, the discharge port may be formed in a wide shape so that the range in which the soot can be removed by the exhaust gas can be expanded.

The side view which showed the mode of the whole combine from the left side of the combine which concerns on one Embodiment of this invention. The side view which showed the mode of the whole combine from the right side of a combine. The top view of a combine. The side view which showed the positional relationship of the exhaust structure of a diesel engine, a Glen tank, and a threshing apparatus from the left side of a combine. The top view which showed the positional relationship of the exhaust structure of a diesel engine, a glen tank, and a threshing apparatus. The schematic diagram which showed the internal structure of the DPF part. The schematic diagram which showed the internal structure of the NOx catalyst part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Mowing device 5 Threshing device 7 Glen tank 20 Diesel engine 64 Exhaust manifold 65 DPF part 68 NOx catalyst part 69 Tail pipe 90 Silencer (silencer)
91 Exhaust pipe

Claims (5)

In a combine equipped with a traveling machine body equipped with a diesel engine, a reaping device, a threshing device, and a Glen tank,
An exhaust pipe extending downward between the threshing device and the Glen tank;
A diesel particulate filter that collects particulate matter in the exhaust gas of the diesel engine;
With
The diesel particulate filter is disposed between an exhaust manifold of the diesel engine and a tail pipe of the exhaust pipe. The combine according to claim 1,
The combine characterized by arrange | positioning the NOx catalyst which reduce | restores the nitrogen oxide in the exhaust gas of the said diesel engine in the exhaust path between the said diesel particulate filter and the said tail pipe. The combine according to claim 2,
In a side view, a combine in which the diesel particulate filter and the NOx catalyst are arranged with a first cereal cylinder for conveying the first thing sandwiched in the front-rear direction. A combine according to any one of claims 1 to 3,
A combiner, wherein a silencer is disposed in an exhaust path between the diesel particulate filter and the tail pipe. A combine according to any one of claims 1 to 4,
An exhaust gas exhaust port formed in the tail pipe is disposed below the traveling machine body.

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