JP2015121166A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a support structure for a tail pipe 84 which discharges exhaust gas from an exhaust gas cleaning case 50 while arranging the exhaust gas cleaning case 50 at a position as close as possible to an engine 20.SOLUTION: A combine harvester comprises: a reaping device 3 for reaping un-reaped grain culms in an agricultural field; a thresher 5 for threshing the reaped grain culms; a traveling machine body 1 mounted with the reaping device 3 and the thresher 5; an engine 20 arranged in an engine room 43 on the traveling machine body 1; and an exhaust gas cleaning case 50 arranged in an exhaust system of the engine 20. The combine harvester also comprises an exhaust outlet pipe 82 communicated with the exhaust gas cleaning case 50 and a tail pipe 84 communicated with the exhaust outlet pipe 82. The tail pipe 84 is configured to have a diameter of the exhaust inlet side thereof larger than that of the exhaust outlet side of the exhaust outlet pipe 82, and the exhaust outlet side of the exhaust outlet pipe 82 is loosely fitted to the exhaust inlet side of the tail pipe 84. The tail pipe 84 is communicated with an engine room support post 71 forming a framework of the engine room 43.

Description

  The present invention relates to a combine that harvests a grain by threshing the harvested corn straw with a threshing apparatus while harvesting an uncut grain culm in a field by a harvesting device, and more specifically, an exhaust for purifying engine exhaust gas. The present invention relates to a combine equipped with a gas purification case.

  In a conventional combine, a part of the exhaust gas purification case is protruded on the side of the mowing device disposed so as to be movable up and down on the front side of the traveling machine body, and the exhaust gas purification case is arranged biased toward the mowing device (for example, patent Reference 1). Further, the engine room top plate portion is formed in a stepped shape, and the exhaust gas purification case is disposed at a position higher than the lower portion of the driver seat (see, for example, Patent Document 2).

JP 2013-1 Japanese Unexamined Patent Publication No. 2013-2

  By the way, since the combine includes various devices such as a reaping device and a threshing device, an engine room is formed below the operation unit on the right side of the reaping device, and the engine is mounted in the engine room. In recent years, the size of the engine room is often limited due to the demand for a compact and lightweight combine (the engine mounting space is often narrow). In the engine room with many restrictions, not only the engine but also various parts such as an air cleaner and a radiator are arranged.

  On the other hand, as the length of the exhaust system pipe from the engine to the exhaust gas purification case increases, the temperature of the exhaust gas when it reaches the exhaust gas purification case naturally decreases. Since it is desirable that the temperature of the exhaust gas passing through the exhaust gas purification case is equal to or higher than a predetermined temperature, there is a demand for disposing the exhaust gas purification case as close to the engine as possible.

  When the exhaust gas purification case is attached to the engine, the engine vibration may be transmitted directly to the exhaust gas purification case. Also, since the exhaust gas purification case is a heavy product unlike a muffler, for example, It is necessary to strengthen the support structure. Further, the engine vibration transmitted through the exhaust gas purification case is also transmitted to the exhaust outlet pipe connected to the exhaust gas purification case and the tail pipe connected to the exhaust outlet pipe. For this reason, it is necessary to consider the support structure of the tail pipe and the exhaust outlet pipe.

  This invention makes it a technical subject to provide the combine which improved by examining these present conditions.

  The invention of claim 1 includes a harvesting device that harvests unharvested grain pods in a field, a threshing device that threshs the harvested corn harvested by the harvesting device, a traveling machine body equipped with the harvesting device and the threshing device, A combine comprising an engine disposed in an engine room on a traveling machine body and an exhaust gas purification case disposed in an exhaust system of the engine, an exhaust outlet pipe communicating with the exhaust gas purification case, and communicating with the exhaust outlet pipe A tail pipe configured to have a diameter on the exhaust inlet side of the tail pipe larger than a diameter on the exhaust outlet side of the exhaust outlet pipe, and the exhaust outlet of the exhaust outlet pipe on the exhaust inlet side of the tail pipe. The tail pipe is connected to the engine room column which is loosely fitted to the side and forms the framework of the engine room.

  According to a second aspect of the present invention, in the combine according to the first aspect, the exhaust outlet pipe is connected to a support body that supports the exhaust gas purification case on the engine, and the position of the exhaust outlet pipe with respect to the exhaust gas purification case The exhaust outlet pipe is fastened to the support leg so that the position of the tail pipe relative to the exhaust outlet pipe can be adjusted in the horizontal direction. The pipe is fastened.

  A third aspect of the present invention is the combine according to the first or second aspect, wherein the exhaust gas purification case and the exhaust outlet pipe are disposed above the engine in an axial direction of the output shaft of the engine in a plan view. Arranged so as to extend in parallel, the exhaust inlet side of the exhaust gas purification case is located on the left and right center side of the traveling aircraft body, the exhaust outlet side of the exhaust gas purification case is located on the left and right outside of the traveling aircraft body, One end side of the exhaust outlet pipe is connected to the exhaust outlet side of the exhaust gas purification case, the other end side of the exhaust outlet pipe is connected to the support leg that supports the exhaust inlet side of the exhaust gas purification case, The tail pipe extending in a direction intersecting the axial direction of the output shaft of the engine is communicated with the other end side of the exhaust outlet pipe.

  According to the invention of claim 1, a harvesting device that harvests unharvested rice cake in the field, a threshing device that threshs the harvested rice cake that has been harvested by the harvesting device, a traveling machine body equipped with the harvesting device and the threshing device, In a combine comprising an engine disposed in an engine room on the traveling machine body and an exhaust gas purification case disposed in an exhaust system of the engine, an exhaust outlet pipe communicating with the exhaust gas purification case, and an exhaust outlet pipe A tail pipe communicating with the exhaust pipe, the exhaust pipe having a diameter larger than that of the exhaust outlet side of the exhaust pipe. Since the tail pipe is connected to the engine room strut that is loosely fitted on the outlet side and forms the framework of the engine room, the tail from the vibration system of the engine. Can disconnect the type, it can be significantly suppressed damage the said tail pipe due to the difference in the oscillation frequencies of the traveling machine body side and the engine side. Further, the engine room support can also be used as a support member for the tail pipe, so that the tail pipe support structure can be manufactured at low cost.

  According to a second aspect of the present invention, the exhaust outlet pipe is connected to a support body that supports the exhaust gas purification case on the engine, and the position of the exhaust outlet pipe relative to the exhaust gas purification case can be adjusted in the vertical direction. Further, since the exhaust outlet pipe is fastened to the support leg body, the tail pipe is fastened to the engine room column so that the position of the tail pipe relative to the exhaust outlet pipe can be adjusted in the left-right direction. The exhaust gas purification case and the exhaust outlet pipe can be compactly arranged using a dead space on the upper surface side of the engine, but a processing error or set of a fastening portion between the exhaust outlet pipe and the support leg body can be achieved. It is possible to easily absorb attachment errors and processing errors and assembly errors between the exhaust outlet pipe and the tail pipe, and the exhaust outlet pipe and the tail pipe. Assembling workability can be improved.

  According to the invention of claim 3, above the engine, the exhaust gas purification case and the exhaust outlet pipe are arranged so as to extend in parallel with the axial direction of the output shaft of the engine in plan view, An exhaust inlet side of the exhaust gas purification case is located on the left and right center side of the traveling aircraft body, an exhaust outlet side of the exhaust gas purification case is located on the left and right outer sides of the traveling aircraft body, and on the exhaust outlet side of the exhaust gas purification case One end side of the exhaust outlet pipe is connected, the other end side of the exhaust outlet pipe is connected to the support leg that supports the exhaust inlet side of the exhaust gas purification case, and the other end side of the exhaust outlet pipe Since the tail pipe extending in a direction crossing the axial direction of the engine output shaft is connected, the exhaust outlet pipe can be formed long along the longitudinal direction of the exhaust gas purification case, and the temperature of the exhaust gas can be adjusted. Exhaust outside the machine It becomes possible to or enhance the muting function or reduced before. Further, after arranging the exhaust gas purification case and the exhaust outlet pipe in the upper surface side space of the engine, the tail pipe can be arranged in a side space of the threshing device, and the exhaust gas purification case for each dead space, The arrangement efficiency of the exhaust outlet pipe and the tail pipe can be improved.

It is a left view of the combine for four-row cutting of this invention. It is a right view of a combine. It is a top view of a combine. It is a perspective view of the operation part seen from the left rear. It is a left view of a driving part. It is an expansion left view of a driving part. It is a left view of an engine room. It is a front view of an engine room. It is a top view of an engine room. It is the perspective view which looked at the diesel engine from the front diagonal right side. It is the perspective view which looked at the diesel engine from the back diagonal left side. It is a left view of a diesel engine. It is a top view of a diesel engine. It is a right view of a diesel engine. It is a rear view of an engine room.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying a combine according to the present invention will be described with reference to the drawings. In the following description, the left side in the forward direction of the traveling machine body 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side. The combine of the embodiment will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 to 4, a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 (traveling portions) is provided. At the front portion of the traveling machine body 1, a four-row mowing device 3 for mowing cereals is mounted by a single-acting lifting hydraulic cylinder 4 so as to be adjustable up and down around the mowing rotation fulcrum shaft 4a. 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. In addition, the threshing apparatus 5 is arrange | positioned at the left side toward the advancing direction of the traveling body 1, and the Glen tank 7 is arrange | positioned at the right side toward the advancing direction of the traveling body 1 (refer FIG. 3).

  A discharge auger 8 for discharging the grains in the grain tank 7 from the rear to the top of the grain tank 7 is provided. Centering on the vertical auger 8a of the discharge auger 8, the front part of the glen tank 8 can be rotated to the side of the machine body. A driving unit 10 is provided in front of the Glen tank 7 and on the right front of the traveling machine body 1. The driving unit 10 includes a step 10a on which an operator gets on, a driver's seat 10b, a handle column 11 provided with a steering handle 10c, a main speed change lever 12, a sub speed change lever 13, a work clutch lever 14, or switches. The side column 15 is arranged.

  As shown in FIGS. 1 and 2, a diesel engine 20 as a power source of each drive unit is disposed below the driver's seat 10 b in the traveling machine body 1. Further, left and right track frames 21 are disposed on the lower surface side of the traveling machine body 1. The track frame 21 includes a drive sprocket 22 that transmits the power of the engine 20 to the traveling crawler 2, a tension roller 23 that maintains the tension of the traveling crawler 2, and a plurality of track rollers that hold the ground side of the traveling crawler 2 in a grounded state. 24. 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 FIG. 1 to FIG. 3, the reaping device 3 includes a four-row culm pulling device 31 that causes uncut cereals in the field and a clipper-type cutting device that cuts the stock of uncut cereals in the field. A cutting blade device 32 and a culm transporting device 33 for transporting the chopped culm from the culm pulling device 31 to the front end (feed start end side) of the feed chain 6 are provided. An uncut grain culm in the field is pulled up by the grain culling pulling device 31, a stock source of the uncut grain culm is cut by the cutting blade device 32, and the harvested corn straw is conveyed to the front end portion of the feed chain 6 by the grain culling pulling device 31. Is done.

  The threshing device 5 includes a handling cylinder 51 for threshing threshing, an oscillating sorting board 52 as an oscillating sorting mechanism for sorting threshing material falling below the handling cylinder 51, and a sorting wind on the oscillating sorting board 52. , A processing fan 54 for reprocessing threshing waste taken out from the rear part of the handling cylinder 51, and a dust exhausting fan 61 for discharging dust at the rear part of the swing sorter 52 to the outside of the machine. It has.

  As shown in FIGS. 1 and 2, an exhaust chain 62 is disposed on the rear end side (feed end side) of the feed chain 6. The waste passed through the feed chain 6 from the rear end side of the feed chain 6 (the grain from which the grain has been threshed) is discharged to the rear of the traveling machine body 1 in a long state, or the rear side of the threshing device 5 After being cut to a suitable length by the waste cutter 63 provided on the rear, it is discharged to the lower rear side of the traveling machine body 1.

  Below the rocking sorter 52 are a first conveyor 55 for picking up the grains (the first sort) selected by the rocking sorter 52, and grains, swarf, and grains with branches. A second conveyor 56 is provided to take out the mixed second selection. Note that the first conveyor 55 and the second conveyor 56 are provided in this order from the front side in the traveling direction of the traveling machine body 1 so as to extend laterally above the rear part of the traveling crawler 2 in a side view.

  The swing sorting board 52 is configured to swing-sort (specific gravity sort) the cereal grains that have fallen below the handling cylinder 51. Grains that fall from the oscillating sorter 52 (the first sort) are removed from the grain by the sorter wind from the tang fan 53 and fall first onto the conveyor 55. A first cereal cylinder 57 extending in the vertical direction is connected to a terminal portion of the first conveyor 55 that protrudes outward from one side wall (right side wall in the embodiment) of the threshing device 5 near the grain tank 7. Yes. The grain taken out from the first conveyor 55 is carried into the Glen tank 7 by a first cereal conveyor (not shown) provided in the first cereal cylinder 57 and collected in the Glen tank 7.

  Oscillating sorter 52 performs second sorting such as grain with branches and branches (reduction-reprocessed product for re-sorting mixed grain and swarf) by swing sorting (specific gravity sorting). 56 is configured to be dropped. The second sorting product taken out by the second conveyor 56 is returned to the upper surface side of the swing sorting board 52 through the second reduction cylinder 58 and the second processing unit 59 and is re-sorted. Further, the dust and dust in the crushed material from the handling drum 51 are discharged from the rear portion of the traveling machine body 1 toward the field by the sorting air from the tang fan 53 and the dust suction and discharge action of the dust fan 61. .

  Next, the mounting structure of the diesel engine 20 will be described with reference to FIGS. As shown in FIGS. 6 to 8, the diesel engine 20 is supported in an anti-vibration manner via an engine bed 41 below the driver's seat 10 b in the traveling machine body 1. The driving force of the diesel engine 20 is transmitted to each part such as the traveling drive mission case 42 and the threshing device 5 in the front part of the truck frame 21 via a pulley / belt transmission system. The front side and the upper side of the diesel engine 20 are covered with an engine room cover 44. In addition, a partition plate 16 is stretched below the side column 15, and a part of the upper surface side of the diesel engine 20 is covered by the partition plate 16. The front surface side of the engine room 43 is formed by the engine room cover 44, and the upper surface side of the engine room 43 is formed by the engine room cover 44 and the partition plate body 16.

  Further, as shown in FIG. 8, a box-shaped wind tunnel case 46 is erected on the right end portion of the operating unit 10 in the traveling machine body 1 via an opening / closing fulcrum shaft 45. A water cooling radiator 47 is erected on the inner side of the wind tunnel case 46 on the upper surface side of the traveling machine body 1, and the radiator 47 is opposed to the cooling fan 48 of the diesel engine 20. The outside air (cooling wind) is taken into the wind tunnel case 46 from the machine outside opening 46a at the top of the wind tunnel case 46, and the cooled cooling air is removed by rotation of the cooling fan 48 from the machine inside opening 46b at the bottom of the wind tunnel case 46 through the radiator 47 Is sent into the engine room 43 and the diesel engine 20 and the like are cooled by the dust-removed cooling air. In addition, a dust removal net is stretched in the machine-side opening 46 a above the wind tunnel case 46. Due to the presence of the dust removal net, intrusion of sawdust and the like into the wind tunnel case 46 and thus into the engine room 43 is prevented.

  Further, as shown in FIGS. 6 and 7, a pair of left and right engine room columns 71 are erected on the rear surface of the driving unit 10 on the upper surface of the traveling machine body 1, and a back plate 72 is stretched between the left and right engine room columns 71. Has been established. That is, the engine room 43 is formed (partitioned) by the partition plate 16, the engine room cover 44, the wind tunnel case 46, and the back plate 72. The left and right engine room struts 71 constitute a framework of the engine room 43. The diesel engine 20 is disposed in the engine room 43 with the output shaft 20a (crankshaft) of the diesel engine 20 facing left and right. The left end portion of the output shaft 20a is protruded to the left side of the diesel engine 20, and the traveling drive belt 73 and the threshing drive belt 74 are connected to the left end portion (projecting end portion) of the output shaft 20a. The driving force of the diesel engine 20 is output to the traveling crawler 2 from the output shaft 20a via the traveling drive belt 73, and the driving force of the diesel engine 20 is output from the output shaft 20a via the threshing driving belt 74. The output is directed to.

  On the other hand, as shown in FIGS. 4 to 8, an air cleaner 49 that supplies fresh air to the diesel engine 20 and an exhaust gas purification case 50 that processes exhaust gas of the diesel engine 20 are provided. The upper surface side of the engine room cover 44 is formed in a stepped manner in multiple steps, the front upper surface 44a is formed low on the upper surface side of the engine room cover 44, and the rear upper surface 44b is formed high. An auxiliary cover body 44 c is provided between the rear end side of the rear upper surface 44 b of the engine room cover 44 and the upper ends of the left and right engine room columns 71. By fixing the air cleaner 49 to the lower surface of the auxiliary cover body 44c, the air cleaner 49 is positioned below the rear upper surface 44b of the engine room cover 44 and the auxiliary cover body 44c.

  A sound deadening box 40 is mounted on the upper surface side of the auxiliary cover body 44c. The interior of the sound deadening box 40 is communicated with the wind tunnel case 46 via the fresh air intake pipe body 39, and the air cleaner 49 is communicated with the inside of the sound deadening box 40. The air in the wind tunnel case 46 is taken into the intake manifold 19 of the diesel engine 20 via the air cleaner 49. The wind tunnel case 46, the fresh air intake pipe body 39, and the sound deadening box body 40 correspond to an outside air introduction portion located outside the engine room 43. An electrical equipment box 38 is provided on the upper surface side of the sound deadening box 40. The electrical box 38 incorporates an engine controller and the like.

  On the other hand, on the upper surface side of the front upper surface 44a of the engine room cover 44, the driver's seat 10b is supported via the seat support mechanism 10d. An exhaust gas purification case 50 is disposed on the front upper surface 44 a of the engine room cover 44 and on the lower side of the partition plate 16. The exhaust gas purification case 50 is formed in a long cylindrical outer shape and is supported on the upper surface side of the diesel engine 20. In other words, the axial direction of the output shaft 20a of the diesel engine 20 and the exhaust gas movement direction inside the exhaust gas purification case 50 are matched. The longitudinal direction of the exhaust gas purification case 50 is parallel to the output shaft 20 a of the diesel engine 20.

  As shown in FIGS. 7 and 8, the exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50 is positioned below the partition plate body 16, and below the front upper surface 44 a of the engine room cover 44. The exhaust gas extraction side (exhaust outlet side) of the exhaust gas purification case 50 is positioned. An exhaust inlet pipe 81 is provided on the exhaust gas intake side of the exhaust gas purification case 50, and an exhaust outlet pipe 82 is provided on the exhaust gas extraction side of the exhaust gas purification case 50. An exhaust inlet pipe 81 of the exhaust gas purification case 50 is connected to an exhaust manifold 83 of the diesel engine 20 via a turbine case 106 of a turbocharger 105 described later, so that the exhaust inlet pipe 81 and the exhaust manifold 83 are communicated with each other. ing. A tail pipe 84 is extended between the threshing device 5 and the grain tank 7, and an exhaust outlet pipe 82 is communicated with the tail pipe 84. Exhaust gas discharged from the exhaust manifold 83 of the diesel engine 20 is discharged outside the machine from the exhaust gas purification case 50 via the tail pipe 84.

  As shown in FIGS. 6, 7, and 9, the exhaust outlet pipe 82 is bent in an L shape toward the left and right center side of the traveling machine body 1, and is further below the partition plate body 16 (the threshing device 5 and the grain). In the vicinity of the entrance to the tank 7, it is bent in an L shape toward the rear. That is, the exhaust outlet pipe 82 has a crank shape in plan view. Accordingly, the exhaust gas purification case 50 and the midway portion of the exhaust outlet pipe 82 are adjacent to each other so as to extend in parallel with the axial direction of the output shaft 20a of the diesel engine 20 in plan view. The rear end side of the exhaust outlet pipe 82 and the front end side of the tail pipe 84 communicate with each other. In this case, the front end side of the tail pipe 84 extending in the direction (front-rear direction) intersecting the axial direction of the output shaft 20a of the diesel engine 20 is communicated with the other end side of the exhaust outlet pipe 82. The tail pipe 84 is bent so that the front end side is bent downward, the midway part is extended downward, and the rear end side is bent rearwardly on the rear upper side of the traveling crawler 2. That is, the tail pipe 84 has a crank shape in side view. The rear end side of the tail pipe 84 is opened obliquely downward and rearward between the left and right traveling crawlers 2.

  As shown in FIG. 8, a lever fulcrum shaft mechanism 17 that supports the work clutch lever 14 and the like is disposed below the side column 15 and above the partition plate 16. On the left side of the partition plate body 16 and the exhaust gas purification case 50, a clutch operation link mechanism 18 is disposed that tensions or relaxes the threshing drive belt 74 in conjunction with the operation of the work clutch lever 14 or the like. A side column cover 15a that covers the left side of the lever fulcrum shaft mechanism 17 and the clutch operation link mechanism 18 is provided. In the embodiment, the upper end portion of the side column cover 15 a is connected to the lower portion of the left side surface of the side column 15. The clutch operation link mechanism 18 is located between the partition plate 16 and the exhaust gas purification case 50 and the side column cover 15a.

  Next, the structure of the diesel engine 20 will be described with reference to FIGS. As shown in FIGS. 10 to 12, an intake manifold 19 is disposed on one side surface (rear side surface) of the cylinder head 91 of the diesel engine 20. The cylinder head 91 is mounted on a cylinder block 92 having a built-in output shaft 20a and a piston (not shown). An exhaust manifold 83 is disposed on the other side (front side) of the cylinder head 91. That is, the intake manifold 19 and the exhaust manifold 83 are distributed and arranged on both sides of the diesel engine 20 with the output shaft 20a interposed therebetween. The output shaft 20a is protruded outward from the left and right sides of the cylinder block 92.

  As shown in FIGS. 4 to 7, a flywheel housing 93 is fixed to the left side surface of the cylinder block 92. A flywheel 94 is provided in the flywheel housing 93. The driving force of the diesel engine 20 is extracted from the left end side of the output shaft 20 a that supports the flywheel 94 toward the transmission case 42. Further, an oil pan 95 is disposed on the lower surface of the cylinder block 92. A cooling fan 48 is disposed on the right side of the cylinder block 92, and a radiator 47 is installed to face the cooling fan 48 (see FIGS. 8 and 9).

  That is, in the diesel engine 20, the cooling fan 48 is disposed on one side (the right side surface of the cylinder block 92) intersecting with the output shaft 20a, and the other side (cylinder) opposite to the one side intersecting with the output shaft 20a. A flywheel 94 is disposed on the left side surface of the block 92. The exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50 is located near the flywheel 94, and the exhaust gas extraction side (exhaust outlet side) of the exhaust gas purification case 50 is located near the cooling fan 48. Therefore, the exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50 is located on the left and right center side of the traveling machine body 1. The exhaust gas extraction side (exhaust outlet side) of the exhaust gas purification case 50 is located on the left and right outer sides of the traveling machine body 1.

  With this configuration, the cooling air from the cooling fan 48 hits the exhaust gas extraction side (exhaust outlet side) through which the exhaust gas after the purification process passes in the exhaust gas purification case 50, and the exhaust gas temperature after the purification process is lowered. Let The exhaust gas intake side (exhaust inlet side) through which the exhaust gas before purification treatment passes in the exhaust gas purification case 50 is far from the cooling fan 48 and is difficult to receive the cooling air. Therefore, the exhaust gas before the purification treatment can be kept at a high temperature, and the purification performance of the exhaust gas purification case 50 can be properly maintained. Then, the exhaust gas temperature after the purification treatment can be lowered and discharged to the outside, for example, it is possible to prevent ignition of swarf etc. in the field.

  As shown in FIGS. 11 and 12, the intake manifold 19 is provided with an exhaust gas recirculation device (EGR device) 96 that takes in exhaust gas for recirculation. The air cleaner 49 is connected to the intake manifold 19 via a compressor case 107 and an exhaust gas recirculation device 96 of the turbocharger 105 described later. The fresh air (external air) sucked into the air cleaner 49 and removed and purified is sent to the intake manifold 19 through the compressor case 107 and the exhaust gas recirculation device 96 of the turbocharger 105, and is supplied to each diesel engine 20. Supplied to the cylinder.

  In the above configuration, a part of the exhaust gas discharged from the diesel engine 20 to the exhaust manifold 83 is recirculated to each cylinder of the diesel engine 20 via the exhaust gas recirculation device 96 and the intake manifold 19. For this reason, the combustion temperature of the diesel engine 20 falls, the emission amount of nitrogen oxides (NOx) from the diesel engine 20 is reduced, and the fuel efficiency of the diesel engine 20 is improved.

  As shown in FIG. 11, a fuel pump 98 connected to a fuel tank (not shown) and a common rail 99 are connected to the injectors 97 for the four cylinders of the diesel engine 20. The common rail 99 and the fuel filter 100 are disposed on the intake manifold 19 installation side of the cylinder head 91, and the fuel pump 98 is disposed on the cylinder block 92 below the intake manifold 19. Each injector 97 has an electromagnetic switching control type fuel injection valve (not shown). A common rail 99 is connected to the discharge side of the fuel pump 98, and each injector 97 of the diesel engine 20 is connected to the cylindrical common rail 99. The high-pressure fuel is temporarily stored in the common rail 99 and supplied to each cylinder (cylinder) of the diesel engine 20 via the common rail 99.

  In the above configuration, the fuel of the diesel engine 20 is pumped to the common rail 99 by the fuel pump 98 and stored in the common rail 99 as high-pressure fuel. Then, by controlling the fuel injection valves of the injectors 97 to open and close, the high-pressure fuel in the common rail 99 is injected into each cylinder of the diesel engine 20. That is, by electronically controlling the fuel injection valve of each injector 97, the fuel injection pressure, injection timing, and injection period (injection amount) are controlled with high accuracy. Therefore, nitrogen oxides (NOx) discharged from the diesel engine 20 can be reduced.

  As shown in FIG. 10, a turbocharger 105 is disposed on the front side of the cylinder head 5 and above the exhaust manifold 83. The turbocharger 105 includes a turbine case 106 with a built-in turbine wheel and a compressor case 107 with a blower wheel. An exhaust gas intake side of the turbine case 106 is connected to the exhaust manifold 83. An exhaust inlet pipe 81 of the exhaust gas purification case 50 is connected to the exhaust gas extraction side of the turbine case 106. That is, the exhaust gas discharged from each cylinder of the diesel engine 20 to the exhaust manifold 83 is discharged outside the machine via the turbocharger 105, the exhaust gas purification case 50, and the like.

  The air intake side of the compressor case 107 is connected to the air intake side of the air cleaner 49 via the air supply pipe 108. The intake side of the compressor case 107 is connected to the intake manifold 19 via a supercharging pipe 109 and an exhaust gas recirculation device 96. That is, the fresh air that has been dust-removed and purified by the air cleaner 49 is sent from the compressor case 107 to the exhaust gas recirculation device 96 through the supercharging pipe 109 and then supplied to each cylinder of the diesel engine 20.

  As shown in FIGS. 10 to 13, as an exhaust gas purifying device for purifying exhaust gas discharged from each cylinder of the diesel engine 20, an exhaust gas purification case for removing particulate matter in the exhaust gas of the diesel engine 20. 50 (diesel particulate filter (DPF)). As shown in FIG. 10, an oxidation catalyst 111 and a soot filter 112 are provided in the exhaust gas purification case 50. Exhaust gas discharged from each cylinder of the diesel engine 20 to the exhaust manifold 83 is discharged to the outside through the exhaust gas purification case 50 and the like. The exhaust gas purification case 50 is configured to reduce carbon monoxide (CO), hydrocarbon (HC), particulate matter (PM), and nitrogen oxides (NOx) in the exhaust gas of the diesel engine 20. .

  The exhaust gas purification case 50 is configured in a horizontally long elongated cylindrical shape that extends long in a direction parallel to the output shaft 20a (crankshaft) of the diesel engine 20 in plan view. The exhaust gas purification case 50 is provided with an exhaust inlet pipe 81 that takes in the exhaust gas at a site near the flywheel 94, and the exhaust gas exhaust case that exhausts the exhaust gas after purification at a site near the cooling fan 48 in the exhaust gas purification case 50. A tube 82 is provided. The left and right side surfaces of the cylinder head 91 detachably support one end side and the other end side in the exhaust gas movement direction of the exhaust gas purification case 50 via the left support leg 113 and the right support leg 114. That is, the exhaust gas purification case 50 is attached to the upper surface side of the diesel engine 20 via the left support leg 113 and the right support leg 114. The exhaust gas purification case 50 is positioned above the exhaust manifold 83 with the longitudinal direction of the cylindrical exhaust gas purification case 50 facing the left and right direction of the diesel engine 20.

  As described above, the axial direction of the output shaft 20a of the diesel engine 20 and the exhaust gas movement direction inside the exhaust gas purification case 50 (longitudinal direction of the exhaust gas purification case 50) coincide with each other. Similarly, the longitudinal direction of the air cleaner 49 also coincides with the axial direction of the output shaft 20 a of the diesel engine 20. As shown in FIG. 9, the air cleaner 49 and the exhaust gas purification case 50 are located above the diesel engine 20 so as to extend parallel to the axial direction of the output shaft 20a of the diesel engine 20 in plan view. . In this case, the air cleaner 49 is located below the rear upper surface 44 b and the auxiliary cover body 44 c of the engine room cover 44 and above the intake manifold 19. The exhaust gas purification case 50 is located below the front upper surface 44 a of the engine room cover 44 and the partition plate 16 and above the exhaust manifold 83.

  With this configuration, the dead space above the diesel engine 20 can be effectively used while the intake side of the air cleaner 49 can be easily connected to an outside air introduction section (wind tunnel case 46, etc.) disposed outside the engine room 43, for example. Thus, the exhaust gas purification case 50 and the air cleaner 49 can be arranged in a compact manner within the outline of the diesel engine 20 in plan view (within the front-rear width and the left-right width) (see FIG. 13). In addition, the height position of the air cleaner 49 and the exhaust gas purification case 50 in the side view is up and down along the staircase shape of the engine room cover 44 such that the air cleaner 49 is on the upper side and the exhaust gas purification case 50 is on the lower side. It's off.

  As shown in FIGS. 10 and 12, a turbocharger 105 that supercharges air to the diesel engine 20 is disposed above the exhaust manifold 83. An exhaust gas purification case 50 is disposed above the turbocharger 105. That is, the exhaust gas purification case 50 and the turbocharger 105 are lined up and down above the exhaust manifold 83. Further, as shown in FIGS. 11 and 12, an exhaust gas recirculation device 96 (EGR device) that recirculates exhaust gas to the intake system (intake manifold 19) of the diesel engine 20 is disposed above the intake manifold 19. ing. An air cleaner 49 is disposed above the exhaust gas recirculation device 96. That is, the air cleaner 49 and the exhaust gas recirculation device 96 are lined up and down above the intake manifold 19.

  With this configuration, the exhaust gas purification case 50 and the turbocharger 105 related to the exhaust system are on the exhaust manifold 83 side, the air cleaner 49 and the exhaust gas recirculation device 96 related to the intake system are on the intake manifold 19 side, They will be arranged side by side. Therefore, it is easy to grasp the arrangement of exhaust system members (exhaust gas purification case 50 and turbocharger 105) and the arrangement of intake system members (air cleaner 49 and exhaust gas recirculation device 96), improving assembly workability and maintenance. Helps to improve performance. In addition, it is easy to route the exhaust system pipe (exhaust outlet pipe 82, etc.) and the intake system pipe (supply pipe 108, etc.) in an order as short as possible around the exhaust system member and the intake system member. Etc. can be manufactured at low cost.

  Further, as shown in FIGS. 11 and 12, the exhaust support plate 115 is bolted to the left support leg 113 bolted to the left side surface of the cylinder head 91 so as to protrude rearward, while the rear end of the exhaust outlet pipe 82 An outlet pipe bracket 116 having a substantially L shape in plan view is fixed to the side by welding. An outlet pipe bracket 116 is bolted to the rear end side of the exhaust support plate 115 so that the height of the outlet pipe bracket 116 can be adjusted. That is, the exhaust outlet pipe 82 is supported on the rear end side of the exhaust support plate 115 on the left side of the cylinder head 91 via the outlet pipe bracket 116 so that the position of the exhaust outlet pipe 82 can be adjusted in the vertical direction. The vertical height position of the exhaust outlet pipe 82 with respect to the exhaust gas purification case 50 is adjusted. In this case, a pair of elongated holes 117 are formed in the front plate portion of the outlet pipe bracket 116 so as to be long in the vertical direction and aligned in the front and rear directions. By screwing bolts inserted into the long holes 117 of the outlet pipe bracket 116 into bolt holes formed in the exhaust support plate 115, the height of the outlet pipe bracket 116 can be adjusted to the rear end side of the exhaust support plate 115. It is fixed.

  With this configuration, since the exhaust outlet pipe 82 is connected to the left support leg 113 that supports the exhaust gas purification case 50 on the diesel engine 20, the left support leg 113 for supporting the exhaust gas purification case 50 is connected to the exhaust outlet pipe. The exhaust gas purification case 50 and the exhaust outlet pipe 82 can be integrally supported by using the supporting member 82 as a support member, and the support structure of the exhaust outlet pipe 82 can be manufactured at a low cost. This also contributes to improving the support rigidity of the exhaust outlet pipe 82.

  Further, since the exhaust outlet pipe 82 is fastened to the left support leg 113 so that the position of the exhaust outlet pipe 82 with respect to the exhaust gas purification case 50 can be adjusted, the dead space on the upper surface side of the diesel engine 20 is utilized, Although the exhaust gas purification case 50 and the exhaust outlet pipe 82 can be arranged in a compact manner, processing errors and groups of fastening portions (the exhaust support plate 115 and the outlet pipe bracket 116) between the exhaust outlet pipe 82 and the left support leg body 113 are possible. Installation errors can be easily absorbed, and assembly workability can be improved.

  Further, one end side (front end side) of the exhaust outlet pipe 82 is connected to the exhaust gas extraction side (exhaust outlet side) of the exhaust gas purification case 50 to support the exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50. Since the other end side (rear end side) of the exhaust outlet pipe 82 is connected to the left support leg 113 that performs this, the exhaust outlet pipe 82 can be formed long along the longitudinal direction of the exhaust gas purification case 50, and the exhaust gas It is possible to reduce the temperature of the battery before it is discharged to the outside of the machine or to improve the silencing function.

  As shown in FIGS. 11 and 12, the exhaust inlet inner diameter on the front end side of the tail pipe 84 is formed larger than the outer diameter of the exhaust outlet on the rear end side of the exhaust outlet pipe 82. The exhaust outlet of the tail pipe 84 is fitted into the exhaust outlet of the exhaust outlet pipe 82 in a loose fit. For this reason, external air is sucked into the tail pipe 84 from the gap between the exhaust outlet of the exhaust outlet pipe 82 and the exhaust inlet of the tail pipe 84 under a negative pressure. Further, the tail pipe 84 can be separated from the vibration system of the diesel engine 20, and the possibility of damaging the tail pipe 84 due to the difference in vibration frequency between the diesel engine 20 side and the traveling machine body 1 side can be remarkably suppressed.

  As shown in FIGS. 4, 5, and 15, a front support bracket 85 is fixed by welding to the front end side of the tail pipe 84 that is crank-shaped in side view. A pipe base 86 is fixed to the left side surface of the left engine room column 71 by welding. The front support bracket 85 is bolted to the pipe base 86 so that the attachment position can be adjusted. That is, the front end side of the tail pipe 84 is supported on the pipe base 86 of the left engine room column 71 via the front support bracket 85 so that the position of the tail pipe 84 can be adjusted in the left-right direction. In this case, the front support bracket 85 is formed with a pair of adjustment elongated holes 118 that are long in the left and right direction and aligned in the vertical direction. The front support bracket 85 is fixed to the pipe base 86 so that the left and right positions can be adjusted by screwing bolts inserted into the respective adjustment elongated holes 118 of the front support bracket 85 into bolt holes formed in the pipe base 86. Further, a rear support bracket 87 is bolted to the upper surface side of the traveling machine body 1. A rear end side (exhaust outlet) of the tail pipe 84 opened rearward is attached to the rear support bracket 87. The rear support bracket 87 supports the exhaust outlet side of the tail pipe 84 so as to match the horizontal frame height of the traveling machine body 1. If comprised in this way, the left engine compartment support | pillar 71 can be used also as the support member of the tail pipe 84, and the support structure of the tail pipe 84 can be manufactured at low cost.

  That is, the exhaust gas purification case 50 above the diesel engine 20 is supported at a height substantially equal to the height of the exhaust pipe side of the tail pipe 84, and the frame height of the traveling machine body 1 on which the threshing device 5 and the glen tank 7 are mounted. The exhaust outlet side of the tail pipe 84 is supported to be substantially the same height. As shown in FIGS. 4 and 5, the rear end edge portion of the pulley cover plate 88 is brought close to the longitudinal middle portion of the tail pipe 84. The outside of the tang pulley 89 that inputs the driving force of the diesel engine 20 to the threshing device 5 is surrounded by the tail pipe 84 and the pulley cover plate 88. By the shielding with the tail pipe 84 and the pulley cover plate 88, the outside air warmed by the exhaust heat of the tail pipe 84 is sucked into the tang fan 53 as the selection air.

  As apparent from the above description and FIGS. 4, 5, and 15, the harvesting device 3 that harvests the uncut grain culm in the field, the threshing device 5 that threshs the harvested sorghum harvested by the harvesting device 3, and A traveling machine body 1 on which the reaping device 3 and the threshing apparatus 5 are mounted, an engine 20 disposed in an engine room 43 on the traveling machine body 1, and an exhaust gas purification case 50 disposed in an exhaust system of the engine 20 are provided. The combine includes an exhaust outlet pipe 82 that communicates with the exhaust gas purification case 50 and a tail pipe 84 that communicates with the exhaust outlet pipe 82, and the diameter of the tail pipe 84 on the exhaust inlet side of the exhaust outlet pipe 82 is The diameter of the exhaust outlet side is configured to be larger than the diameter of the exhaust outlet side, and the exhaust outlet side of the exhaust outlet pipe 82 is loosely fitted to the exhaust inlet side of the tail pipe 84, and the framework of the engine room 43 is formed. Since the tail pipe 84 is connected to the engine room column 71 to be formed, the tail pipe 84 can be separated from the vibration system of the engine 20, which is caused by a difference in vibration frequency between the engine 20 side and the traveling machine body 1 side. Thus, the possibility of damaging the tail pipe 84 can be remarkably suppressed. In addition, the support structure of the tail pipe 84 can be manufactured at a low cost by using the engine room column 71 also as a support member of the tail pipe 84.

  Further, the exhaust outlet pipe 82 is connected to a support leg 113 for supporting the exhaust gas purification case 50 on the engine 20 so that the position of the exhaust outlet pipe 82 relative to the exhaust gas purification case 50 can be adjusted in the vertical direction. In addition, the tail pipe 84 is attached to the engine room column 71 such that the exhaust outlet pipe 82 is fastened to the support leg body 113 while the position of the tail pipe 84 with respect to the exhaust outlet pipe 82 can be adjusted in the horizontal direction. Since the exhaust gas purification case 50 and the exhaust outlet pipe 82 can be compactly arranged using the dead space on the upper surface side of the engine 20, the exhaust outlet pipe 82 and the support leg are used. Processing error and assembly error of the fastening portion with the body 113, and processing error between the exhaust outlet pipe 82 and the tail pipe 84 Assembling error can be easily absorbed, thereby improving the assembling workability of the exhaust outlet pipe 82 and the tail pipe 84.

  Further, the exhaust gas purification case 50 and the exhaust outlet pipe 82 are disposed above the engine 20 so as to extend in parallel with the axial direction of the output shaft 20a of the engine 20 in a plan view. An exhaust inlet side of the gas purification case 50 is located on the left and right center side of the traveling machine body 1, and an exhaust outlet side of the exhaust gas purification case 50 is located on the left and right outer sides of the traveling machine body 1. One end side of the exhaust outlet pipe 82 is connected to the exhaust outlet side, the other end side of the exhaust outlet pipe 82 is connected to the support leg 113 that supports the exhaust inlet side of the exhaust gas purification case 50, and the exhaust outlet Since the tail pipe 84 extending in a direction intersecting the axial direction of the output shaft 20a of the engine 20 is communicated with the other end side of the pipe 82, it extends along the longitudinal direction of the exhaust gas purification case 50. Wherein the exhaust outlet pipe 82 can be formed in an elongated, it is possible or to improve the silencing function or reduced before discharge temperature of the exhaust gas to the outside Te. Further, after the exhaust gas purification case 50 and the exhaust outlet pipe 82 are arranged in the space on the upper surface side of the engine 20, the tail pipe 84 can be arranged in a side space of the threshing device 5, and the dead space for each dead space can be arranged. The arrangement efficiency of the exhaust gas purification case 50, the exhaust outlet pipe 82, and the tail pipe 84 can be improved.

  As shown in FIG. 14, a cooling water pump 120 is disposed on the upper left side surface of the cylinder block 92. The cooling water pump 120 is configured to be driven together with the cooling fan 48 by belt transmission accompanying rotation of the output shaft 20 a of the diesel engine 20. The upper side of the radiator 47 for water cooling of the diesel engine 20 disposed inside the wind tunnel case 46 and the thermostat case 121 provided at the upper part of the cooling water pump 120 are connected via a cooling water supply pipe 122. The side of the cooling water pump 120 and the lower side of the radiator 47 are connected via a cooling water return pipe 123. The cooling water in the radiator 47 is supplied from the cooling water supply pipe 122 to the cooling water pump 120 via the thermostat case 121. The cooling water is supplied to a water cooling jacket (not shown) formed in the cylinder head 91 and the cylinder block 92 by driving the cooling water pump 120 to cool the diesel engine 20. The cooling water that has contributed to the cooling of the diesel engine 20 is returned from the cooling water pump 120 to the radiator 47 through the cooling water return pipe 123.

  In the embodiment, in the side view shown in FIG. 14, an air supply pipe 108 extending from the air cleaner 49 is provided below the exhaust inlet side of the exhaust outlet pipe 82 communicating with the exhaust gas purification case 50, and the exhaust manifold 83 from the intake manifold 19 side. It is positioned so as to extend toward the side. A cooling water return pipe 123 is positioned below the air supply pipe 108. The cooling water supply pipe 122 is passed between the exhaust inlet side of the exhaust outlet pipe 82 and the air supply pipe 108. The air supply pipe 108 and the cooling water supply pipe 122 that do not generate exhaust heat are crossed in a side view. The exhaust outlet pipe 82, the air supply pipe 108, and the cooling water return pipe 123 are set so as not to cross each other in a side view.

  If comprised in this way, the exhaust outlet pipe 82, the air supply pipe | tube 108, and the cooling water return pipe | tube 123 can be routed by the appropriate arrangement space | interval up and down, without making it mutually cross | intersect by side view. For this reason, the assembling workability and maintenance performance of these piping structures can be improved. Further, the distance between the exhaust outlet pipe 82 and the air supply pipe 108 is so large that the cooling water supply pipe 122 can pass through, and the exhaust pipe 108 is deteriorated due to exhaust heat from the exhaust gas purification case 50 and the exhaust outlet pipe 82. Can be suppressed.

1 traveling machine body 3 reaping device 5 threshing device 20 diesel engine 20a output shaft 43 engine room 44 engine room cover 49 air cleaner 50 exhaust gas purification case 71 engine room column 82 exhaust outlet pipe 84 tail pipe 113, 114 support leg

Claims (3)

A reaping device for reaping unharvested cereals in the field, a threshing device for threshing the reaped stalks harvested by the reaping device, a traveling machine body equipped with the reaping device and the threshing device, and an engine room on the traveling machine body In a combine provided with an engine disposed in the engine and an exhaust gas purification case disposed in an exhaust system of the engine,
An exhaust outlet pipe communicating with the exhaust gas purification case; and a tail pipe communicating with the exhaust outlet pipe, wherein the diameter of the tail pipe on the exhaust inlet side is larger than the diameter of the exhaust outlet pipe on the exhaust outlet side The exhaust outlet side of the exhaust outlet pipe is loosely fitted to the exhaust inlet side of the tail pipe, and the tail pipe is connected to the engine room column constituting the framework of the engine room.
Combine. The exhaust outlet pipe is connected to a support leg that supports the exhaust gas purification case on the engine, and the exhaust leg is connected to the support leg so that the position of the exhaust outlet pipe relative to the exhaust gas purification case can be adjusted in the vertical direction. While fastening the outlet pipe,
The tail pipe is fastened to the engine room column so that the position of the tail pipe with respect to the exhaust outlet pipe can be adjusted in the left-right direction.
The combine according to claim 1. Above the engine, the exhaust gas purification case and the exhaust outlet pipe are arranged so as to extend in parallel with the axial direction of the output shaft of the engine in plan view,
An exhaust inlet side of the exhaust gas purification case is located on the left and right center side of the traveling aircraft body, an exhaust outlet side of the exhaust gas purification case is located on the left and right outer sides of the traveling aircraft body, and an exhaust outlet side of the exhaust gas purification case One end side of the exhaust outlet pipe is connected, the other end side of the exhaust outlet pipe is connected to the support leg that supports the exhaust inlet side of the exhaust gas purification case, and the other end side of the exhaust outlet pipe is connected, The tail pipe extending in a direction intersecting the axial direction of the output shaft of the engine is communicated.
The combine according to claim 1 or 2.

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