JP6226299B2 - Combine - Google Patents

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.

  Further, as the exhaust system pipe length from the engine to the exhaust gas purification case becomes longer, 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.

  In view of these points, in the prior art, for the purpose of disposing the exhaust gas purification case as close as possible to the engine, a part of the exhaust gas purification case is biased toward the cutting device and slightly protrudes from the engine room. Yes. In this case, the engine itself is also arranged near the mowing device, and the attachment position of the exhaust gas purification case is secured on the upper surface side of the engine. Then, since the exhaust gas purification case and a part of the engine protrude from the engine room, the left and right width dimensions of the engine and its peripheral structure become long, and as a result, there is a problem that it is difficult to easily downsize the left and right width dimensions of the traveling machine body.

  In addition, since the cooling effect in the engine room is affected by the amount of exhaust heat from the exhaust gas purification case, when the driver's seat is provided on the engine room, the effect of the exhaust heat in the engine room is given to the operator. As a result, the maneuvering environment becomes unpleasant. On the other hand, when the exhaust gas purification case is provided in the engine, the exhaust gas temperature becomes high. Therefore, in a work vehicle such as a combine, efficient use of waste heat based on the exhaust gas that becomes high temperature is expected.

  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 corn straw in a field, a threshing device that threshs the harvested corn sheared by the harvesting device, a traveling machine body equipped with the harvesting device and the threshing device, In a combine comprising an engine installed in an engine room on a traveling machine body, an exhaust gas purification case for treating exhaust gas of the engine, and an air cleaner for introducing outside air into the engine, the exhaust gas purification case, the air cleaner, and the Exhaust pipes connected to the exhaust side of the exhaust gas purification case are arranged in parallel to each other, the air cleaner is disposed on the upper rear side of the exhaust gas purification case, and the exhaust pipe includes the exhaust gas purification case and the air cleaner. It extends between the two.

  According to a second aspect of the present invention, in the combine according to the first aspect, a heat shield plate is disposed between the air cleaner and the exhaust pipe.

  A third aspect of the present invention is the combine according to the first or second aspect, wherein a radiator is disposed opposite to a cooling fan provided on one side of the engine, and a shroud is provided on the exhaust side of the radiator. A fresh air introduction pipe from an air cleaner is disposed between the shroud and the engine, and a cooling water pipe for connecting the cooling water passage of the engine and the radiator is disposed above the fresh air introduction pipe. It is that.

According to the invention of the present application, a harvesting device that harvests unharvested rice cake in the field, a threshing device that threshs the harvested rice cake harvested by the harvesting device, a traveling machine body that is equipped with the harvesting device and the threshing device, and the traveling machine body In the combine comprising an engine installed in the upper engine room, an exhaust gas purification case for treating exhaust gas of the engine, and an air cleaner for introducing outside air into the engine, the exhaust gas purification case, the air cleaner, and the exhaust gas Exhaust pipes connected to the exhaust side of the purification case are arranged in parallel to each other, the air cleaner is disposed on the upper rear side of the exhaust gas purification case, and the exhaust pipe is disposed between the exhaust gas purification case and the air cleaner. since the intervening extends in the, with respect to the exhaust gas purifying case made with the hot heat source, the Eakuri The possible spaced, it is possible to suppress the temperature increase of the air cleaner. And by arrange | positioning the said exhaust pipe between the said air cleaner and the said exhaust gas purification | cleaning case, the said exhaust pipe functions as a heat insulation member with respect to the said exhaust gas purification | cleaning case, and it is based on the exhaust heat of the said exhaust gas purification | cleaning case The influence on the air cleaner can be reduced. Therefore, temperature rise of the air cleaner due to heating of the engine and the exhaust gas purification case can be suppressed, and deterioration of the air cleaner can be suppressed.

  Further, according to the present invention, since the heat shield plate is disposed between the air cleaner and the exhaust pipe, the air cleaner is disposed above the heat shield plate, and the exhaust gas is disposed below the heat shield plate. Since the gas purification case and the exhaust pipe are arranged, the influence of exhaust heat from the exhaust gas purification case and the exhaust pipe on the air cleaner can be further suppressed.

  According to the invention of the present application, a radiator is disposed opposite to a cooling fan provided on one side of the engine, and a shroud is provided on the exhaust side of the radiator, and the shroud is disposed between the engine and the engine. Since a fresh air introduction pipe from the air cleaner is arranged, and a cooling water pipe for connecting the cooling water passage of the engine and the radiator is arranged above the fresh air introduction pipe, the exhaust gas purification case, etc. It is possible to suppress the temperature rise of the new introduction pipe by the heating element, and to reduce the deterioration of the new air introduction pipe. In addition, the fresh air introduction pipe and the cooling water pipe can be extended in a compact manner by providing appropriate intervals in the vertical direction.

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 upper left front. 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 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 a plane sectional view of an engine room cover. It is a section perspective view of an engine room cover. It is front sectional drawing of an engine room cover. It is a disassembled perspective view of a tail pipe connection part. It is a figure which shows arrangement | positioning of the lever and switch on a side column. 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 the engine room which becomes another structural example. It is a perspective view which shows the arrangement position of a clutch operation mechanism.

  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. , And a dust exhaust fan 61 that discharges dust at the rear of the swing sorter 52 to the outside of the machine. An auger stand 125 is erected on the upper surface side of the threshing device 5. The discharge auger 8 is supported at an upper storage position in the traveling machine body 1 via the auger stand 125. The discharge auger 8 is supported in a substantially horizontal posture by the auger stand 125. As shown in FIG. 3, the discharge auger 8 at the storage position is extended from the right rear corner of the traveling machine body 1 toward the left front corner.

  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 body 16, which is a heat insulating plate body, 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 body 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. Outside air (cooling air) is taken into the wind tunnel case 46 from the machine outside opening 46a on the right side of the wind tunnel case 46, and dust is already removed by rotation of the cooling fan 48 from the machine inside opening 46b on the left side of the wind tunnel case 46 through the radiator 47. Cooling air 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 46a on the right side surface of 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.

  A shroud 481 that covers the entire ventilation range of the radiator 47 is fixed, and the cooling fan 48 is disposed in an opening formed in the shroud 481. That is, the cooling fan 48 is arranged on the left side of the radiator 47, and the fan shroud 481 is arranged between the cooling fan 48 and the radiator 47 to guide the cooling air. Airflow direction plates (cooling air induction plates) 482 and 483 are extended from the front and rear ends of the fan shroud 481 toward the engine room 43 side. That is, the front wind direction plate 482 has a right edge connected and fixed to the front surface of the fan shroud 481 and covers the front right side of the diesel engine 20, while the rear wind direction plate 483 has a right edge connected and fixed to the rear surface of the fan shroud 481. The right side of the rear surface of the diesel engine 20 is covered.

  The height of the front wind direction plate 482 is made lower than the height of the rear wind direction plate 483, and the upper end of the front wind direction plate 482 is arranged at a position lower than the lower end of the engine room cover 44. On the other hand, the upper end of the rear wind direction plate 483 is substantially the same height as the upper end of the opening of the fan shroud 481 (see FIG. 17). By setting the upper end of the front wind direction plate 482 to a low position, the exhaust gas purification case 50 is disposed above the front wind direction plate 482, so that a decrease in the regeneration temperature in the exhaust gas purification case 50 can be suppressed.

  As described above, the radiator 47 is disposed opposite to the cooling fan 48 provided on one side of the diesel engine 20, and the cooling air guide plates 482 and 483 that guide the cooling air passing through the radiator 47 to the engine room 43 are provided. Provided. Accordingly, the cooling air of the radiator 47 can be efficiently supplied into the engine room 43, and the cooling effect in the engine room 43 is improved. Further, the shroud 481 is provided on the exhaust side of the radiator 47, and cooling air guide plates 482 and 483 are fixed to both side surfaces of the shroud 481. An air supply pipe (new introduction pipe) 108 from the air cleaner 49 is disposed between the shroud 481 and the diesel engine 20. By disposing the air supply pipe 108 on the shroud 481 side, a temperature rise due to a heating element such as the exhaust gas purification case 50 is suppressed, and deterioration of the air supply pipe 108 is suppressed.

  The radiator 47 includes a cooling water pipe 471 connected to the cooling water passage of the diesel engine 20. The cooling water pipe 471 is connected to the opening above the radiator 47, and causes the cooling water circulated through the diesel engine 20 to flow back to the radiator 47. The cooling water pipe 471 is disposed above the air supply pipe 108 so as to intersect with the air supply pipe 108 connected to the air cleaner 49. The connection side of the cooling water pipe 471 with the diesel engine 20 is disposed closer to the diesel engine 20 than the air supply pipe 108. That is, the cooling water pipe 471 is disposed between the supply pipe 108 and the diesel engine 20 and the exhaust gas purification case 50. Therefore, the air supply pipe 108 and the cooling water pipe 471 can be extended in a compact manner with an appropriate interval, and the reflux side cooling water pipe 471 functions as a heat shield member for the air supply pipe 108.

  Further, a pair of left and right engine room columns 71 are erected on the rear side 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. 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 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 12, 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 441 is formed low on the upper surface side of the engine room cover 44, and the rear upper surface 442 is formed high. The engine room cover 44 has a front end of a front upper surface 441 connected to an upper end of a front surface 443 erected above the step 10b, and an upper end of a rear surface 444 erected obliquely upward from a rear end of the front upper surface 441. The rear upper surface 442 is connected. An auxiliary cover body 440 is provided between the rear end side of the rear upper surface 442 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 440, the air cleaner 49 is positioned below the rear upper surface 441 and the auxiliary cover body 442 of the engine room cover 44.

  A sound deadening box 40 is mounted on the upper surface side of the auxiliary cover body 440. 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 441 in 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 441 of the engine room cover 44 and the lower side of the partition plate body 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.

  A lever case (operating tool case) 28 that accommodates the work clutch levers 26 and 27 is disposed at the rear position of the side column 15. The lever case 28 is fixed at the upper end of the engine room column 71 and is disposed on the left side of the electrical box 38 behind the driver's seat 10b. That is, the lever case 28 is disposed in front of the tail pipe 84 and covers the rear end side from the middle part of the tail pipe 84. An auger stand 125 that supports the discharge auger 8 is disposed on the right side of the lever case 28. The auger stand 125 is fixed to the upper front surface of the threshing device 5.

With this configuration, the electrical box 38, the lever case 28, and the auger stand 125 are arranged side by side behind the driver's seat 10b. Therefore, behind the driver's seat 10b, the electrical box 38, the lever case 28, and the auger stand 125 can function as a heat shield member that blocks exhaust heat from the tail pipe 84. Therefore, it is possible to prevent the hot air from the tail pipe 84 from being transmitted to the operator sitting on the driver's seat 10b. A filter regeneration operation in which the exhaust gas temperature in the exhaust gas purification case 50 is maintained at a high temperature can be executed smoothly. Furthermore, by arranging the lever case 28 behind the side column 15, the operation tool is arranged on one side of the operator seated on the driver's seat 10b, so that the operability of the operator can be improved.

  The exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50 is positioned below the partition plate 16, and the exhaust gas of the exhaust gas purification case 50 is located below the front upper surface 441 of the engine room cover 44. The take-out side (exhaust outlet side) is located. 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.

  In addition, as shown in FIGS. 7 to 12, the engine room cover 44 is formed in a double structure, and the left end portions of the internal spaces 44 a and 44 c of the engine room cover 44 of the double structure are opened, It communicates with the internal space 46c. The engine room cover 44 is provided with openings 44d and 44e for sucking outside air at positions on the left and right sides of the driver's seat 10b on the upper surface of the front upper surface 441 having a double structure. The front upper surface 441 of the engine room cover 44 has a double structure by projecting the left and right portions of the seat support mechanism 10d to form internal spaces 44a and 44b, and openings 44d and 44e on the upper surfaces of the internal spaces 44a and 44b, respectively. Is provided. Note that dust removal nets are provided in the openings 44d and 44e for sucking outside air to prevent intrusion of dust and the like into the internal spaces 44a and 44b. In addition, an opening 44f provided at the right end of the internal space 44a communicates with an upper opening 46d provided in the wind tunnel case 46. On the other hand, below the front upper surface 441, a heat insulating plate 445 is installed at a position where the height of the partition plate 16 is equivalent to the entire front upper surface 441.

  The engine room cover 44 is provided with an opening 44g for sucking outside air in front of a front surface 443 having a double structure. In addition, a dust removal net is provided in the opening 44g for sucking outside air to prevent intrusion of soot and the like into the internal space 44c. The front surface 443 of the engine room cover 44 forms an internal space 44c that opens upward, and communicates with the internal spaces 44a and 44b of the front upper surface 441, respectively. In addition, an opening 44 h provided at the right end of the internal space 44 c communicates with a lower opening 46 e provided in the wind tunnel case 46. On the other hand, a heat insulating plate 445 is installed behind the front surface 443 so as to cover the entire front surface 443. In addition, a heat insulating plate 445 is also provided behind the rear surface 444 so as to cover the entire rear surface 444 in the same manner as the front surface 443.

  The wind tunnel case 46 is provided with a plurality of upper and lower machine-side openings 46a provided with a dust removal net, and a shielding plate 46f that covers the machine-side opening 46a arranged on the lower side is arranged in the internal space 46c. The shielding plate 46f includes a plurality of slits opened in the vertical direction, and is detachably installed on the left side surface portion of the wind tunnel case 46. By disposing the shielding plate 46f that covers the machine-side opening 46a provided in the lower stage at a position facing the machine-side opening 46b, dust that has entered from a gap such as the machine-side opening 46a can be stopped by the shielding plate 46f. Moreover, the dust accumulated on the shielding plate 46f can be easily removed by configuring the shielding plate 46f to be detachable.

  The engine room cover 44 having the double structure as described above has the internal spaces 44a and 44b on the front upper surface 441 and the internal space 44c on the front surface 443 communicated with the wind tunnel case 46. A ventilation path to the engine room 43 is formed. When the cooling fan 48 rotates and the inboard opening 46b side of the wind tunnel case 46 becomes negative pressure, the engine room cover 44 sucks outside air from the openings 44d and 44e on the front upper surface 441 and the opening 44g on the front surface 443. .

  Part of the outside air supplied from the opening 44d of the front upper surface 441 flows to the right side from the opening 44d, and then flows into the internal space 46c of the wind tunnel case 46 through the right end opening 44f. The remainder of the outside air supplied from the opening 44d flows to the front of the internal space 44a, thereby flowing into the internal space 44c of the front surface 443 communicating with the front of the internal space 44a. Further, the outside air supplied from the opening 44e of the front upper surface 441 flows to the front of the internal space 44b, thereby flowing into the internal space 44c of the front surface 443 communicating with the front of the internal space 44a. On the other hand, the outside air supplied from the opening 44g of the front surface 443 joins the outside air flowing in from the inner spaces 44a and 44b, flows to the right side, and flows into the inner space 46c of the wind tunnel case 46 through the opening 44h at the right end.

  Thus, the cooling air by the outside air flows through the internal spaces 44a to 44c of the engine room cover 44 having a double structure. Therefore, heat from the engine room 43 side is transferred to the driver seat 10b on the upper surface side of the engine room cover 44 and the step 10a on the front side of the engine room cover 44 by the heat insulating action of the internal space 44d of the engine room cover 44. Can be suppressed. Further, by adopting a configuration in which the outside air is introduced by the engine room cover 44, the temperature rise outside the engine room cover 44 can be suppressed even if the engine room cover 44 covers the upper and front sides of the exhaust gas purification case 50, and the driver's seat It is possible to prevent the hot air in the engine room 43 from being transmitted to the operator sitting on 10b.

  As described above, the driver's seat 10 b is arranged on the upper surface side of the engine room cover 44 that covers the engine room 43. The engine compartment cover 44 has openings 43d, 44e, and 44g for sucking outside air as well as having a double structure on the lower part of the driver's seat 10b and covering the upper part and the front part of the exhaust gas purification case 50. Therefore, the temperature rise outside the engine room cover 44 can be suppressed, and the hot air in the engine room 43 can be prevented from being transmitted to the operator sitting on the driver's seat 10b. Therefore, the exhaust gas purification case 50 can be supported between the lower surface of the driver seat 10b and the upper surface of the diesel engine 20, and the installation width in the left-right direction of the driver seat 10b and the diesel engine 20 can be easily reduced. The exhaust gas purification case 50 can be installed compactly on the upper surface side. Furthermore, a filter regeneration operation in which the exhaust gas temperature in the exhaust gas purification case 50 is maintained at a high temperature can be executed smoothly.

  In addition, an exhaust gas purification case 50 is provided in the engine room 43 below the driver seat 10b, and an air cleaner 49 is provided in the engine room 43 behind the driver seat 10b. Therefore, the exhaust gas purification case 50 that becomes high temperature and the air cleaner 49 that takes in outside air can be compactly disposed above the diesel engine 20 and adjacent to each other. For example, both the diesel engine 20 and the air cleaner 49 can be adjacent to the cooling air intake part of the diesel engine 20, and the outside air can be easily introduced into the air cleaner 49 from the cooling air intake part of the diesel engine 20.

  Further, the radiator 47 is disposed adjacent to the diesel engine 20, and the internal space of the double-structure engine room cover 44 is communicated with the outside air intake side of the radiator 47. Therefore, the internal spaces 44a to 44c of the engine room cover 44 can be ventilated using the outside air suction input of the radiator 47 (cooling fan 48). Therefore, it is not necessary to specially provide a ventilation fan or the like for allowing the air in and out of the internal spaces 44a to 44c of the engine room cover 44 to be configured at low cost.

  As shown in FIGS. 5 to 8, 12, and 13, 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 bent in the shape of an L toward the rear). That is, the exhaust outlet pipe 82 has a crank shape in plan view. Therefore, 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 parallel to 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.

  The tail pipe 84 discharges exhaust gas to the rear upper side from between the threshing device 5 and the Glen tank 7. The tail pipe 84 is bent such that the front end side is bent downward, the midway portion is extended upward, and the rear end side is extended rearward 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 opens rearward and obliquely upward. Further, the rear end side of the tail pipe 84 is configured such that the front is bent toward the threshing device 5 and the rear is directed toward the glen tank 7, and is bent in a C shape in plan view. The rear end side of the tail pipe 84 has a bent shape that bypasses the upper end of the first cereal cylinder 57 connected to the Glen tank 7.

  A midway support bracket 185 is fixed by welding to a longitudinally midway portion of the crank-shaped tail pipe 84 in a side view. A mounting plate 186 is fixed to the left side surface of the left engine room column 71 by welding. A middle support bracket 185 of the tail pipe 84 is bolted to a mounting plate 186 of the left engine room column 71 via a substantially L-shaped connection bracket 187 so that the mounting position can be adjusted. A pair of adjustment elongated holes 190 arranged vertically in the vertical direction are formed in the attachment plate 186 of the left engine room column 71, and the vertical piece portion of the connection bracket 187 and the attachment plate 186 are vertically positioned via both adjustment elongated holes 190. It is fixed so that it can be adjusted. Then, a pair of adjustment elongated holes 191 arranged in the longitudinal direction are formed in the middle support bracket 185 in the tail pipe 184, and the lateral piece portion of the connection bracket 187 and the intermediate support bracket 185 are connected via the adjustment elongated holes 191. It is fixed so that the horizontal position can be adjusted.

  A substantially L-shaped standing bracket 188 is fixed to the rear end side of the tail pipe 84 by welding. A substantially L-shaped connection bracket 189 is fastened and fixed to the right side surface of the threshing device 5. The horizontal piece of the upright bracket 188 is bolted to the connecting bracket 189 fixed to the upper right side of the threshing device 5 from above. A pair of adjustment elongated holes 192 arranged in the left and right longitudinal direction are formed in the horizontal piece portion of the standing bracket 188, and the horizontal piece portion of the standing bracket 188 and the horizontal piece portion of the connecting bracket 189 are formed by both adjustment elongated holes 192. It is fixed so that the horizontal position can be adjusted. A pair of adjustment elongated holes 193 arranged in the vertical longitudinal direction are formed in the vertical piece portion of the connecting bracket 189, and the vertical piece portion of the connecting bracket 189 is vertically positioned on the upper right side of the threshing device 5 through both adjustment elongated holes 193. It is fixed so that it can be adjusted.

  Since the tail pipe 84 can be fixed to the threshing device 5 and the engine room column 71 so that the vertical position can be adjusted, processing errors and assembly errors between the exhaust outlet pipe 82 and the tail pipe 84 can be easily absorbed. Thereby, the workability of assembling the exhaust outlet pipe 82 and the tail pipe 84 can be improved. Moreover, the support structure of the tail pipe 84 can be manufactured at low cost by using the threshing device 5 and the engine room column 71 as the support member of the tail pipe 84.

  As shown in FIGS. 6, 7, and 9, the inner diameter of the exhaust inlet on the front end side of the tail pipe 84 is 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, since the tail pipe 84 can be separated from the vibration system of the diesel engine 20, 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. 5 to 8 and 12, the exhaust gas purification case 50 above the diesel engine 20 is supported at the same height as the exhaust gas purification case 50 and at a position higher than the top surface of the threshing device 5. An exhaust outlet side of the tail pipe 84 is supported. Then, the rear end side of the tail pipe 84 is disposed between the threshing device 5 and the glen tank 7 so as to cover the upper side of the Karatsu pulley 89 that inputs the driving force of the diesel engine 20 to the threshing device 5. Due to the shielding by the tail pipe 84 and the pulley cover plate body (tang pulley pulley cover) 88, the outside air warmed by the exhaust heat of the tail pipe 84 is sucked into the tongue fan 53 as the sorting air.

  A barrel pulley 86 connected to the barrel input shaft 85 is arranged on the front right side of the threshing device 5. The handling pulley 86 transmits the engine 20 driving force transmitted to the Karatsu pulley 89 to the handling cylinder input shaft 85 by belt-linking with the Karatsu pulley 89. The handling cylinder input shaft 85 is connected to the rotating shaft 51a of the handling cylinder 51 via the bevel gear mechanism 85a, and transmits the rotational drive transmitted by the handling pulley 86 to the handling cylinder 51. The handling pulley 86 is disposed at a position between the threshing device 5 and the engine room 43, and the front and upper sides thereof are covered with a pulley cover plate (handling pulley cover) 87.

  The reaping device 3 is configured to be rotatable up and down around a horizontally long reaping input pipe 130 that is pivotally supported by a reaping stand 133 in front of the threshing device 5. The power from the handling cylinder input shaft 85 can be transmitted to the cutting input shaft 132 in the cutting input pipe 130 via a pouring clutch 131 that transmits a constant rotational force to the cutting device 3. That is, by directly transmitting the power from the diesel engine 20 to the reaping device 3 without passing through the mission case 42, the reaping device 3 is forcibly driven at a constant high speed regardless of whether the vehicle speed is fast or slow. It is possible.

  The flow-in clutch 131 includes a clutch operating mechanism 151 including a sector gear 141 (see FIG. 17) that is a rotating member that can be rotated around a rotation axis by driving a single electric motor 140, and a link mechanism 152. Associated with. The clutch actuating mechanism 151 that causes the pouring clutch 131 to act is fixed at the front right-hand column frame of the threshing device 5 and is arranged below the left side of the handling pulley 86, similarly to the rotation fulcrum 153 of the pouring clutch 131. Thereby, the length of the link mechanism 152 which connects the pouring clutch 131 and the clutch operation mechanism 151 can be shortened, and it can comprise compactly.

  The middle portion of the tail pipe 84 is positioned on the right side of the handling pulley 86. In addition, a rotating blade 90 having a shaft that is coaxial with the cylinder input shaft 85 is provided on the cylinder pulley 86 so as to face the tail pipe 84. Therefore, the air heated in the engine room 43 can be exhausted to the threshing device 5 side by rotating the rotary blade 90 according to the rotation of the barrel pulley 86. Thereby, the air heated through the engine room 43 is guided to the space surrounded by the tail pipe 84, the handling pulley cover 87 and the threshing device 5. Then, the outside air warmed by the exhaust heat of the tail pipe 84 is sucked into the tang fan 53 as the sorting air.

  Moreover, when the rotary blade 90 rotates together with the barrel pulley 86, a negative pressure is generated in the space between the threshing device 5 and the tail pipe 84. Therefore, the outside air on the threshing device 5 side flows toward the handling drum pulley 86, and the clutch operating mechanism 151 disposed on the lower left side of the handling drum pulley 86 can be cooled. As a result, excessive heating of the clutch operating mechanism 151 can be prevented, and failure of the electric motor 140 based on heating can be prevented.

  Further, an exhaust gas purification case 50 and an exhaust outlet pipe 82 are disposed above the diesel engine 20 so as to extend in parallel with the axial direction of the output shaft 20a of the diesel engine 20 in plan view. Therefore, 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 diesel engine 20. Further, the exhaust outlet pipe 82 can be formed long along the longitudinal direction of the exhaust gas purification case 50, so that the temperature of the exhaust gas can be lowered before being discharged out of the apparatus, and the silencing function can be improved. Become. Furthermore, after arranging the exhaust gas purification case 50 and the exhaust outlet pipe 82 in the upper surface side space of the diesel engine 20, the tail pipe 84 can be arranged in the side space of the threshing device 5, and the exhaust gas purification case 50 for each dead space. The arrangement efficiency of the exhaust outlet pipe 82 and the tail pipe 84 can be improved.

  Further, an air cleaner 49 is disposed on the rear upper side of the exhaust gas purification case 50 in an arrangement parallel to the exhaust gas purification case 50 in plan view, and an exhaust outlet pipe 82 connected to the exhaust side of the exhaust gas purification case 50 is provided. The exhaust gas purification case 50 and the air cleaner 49 extend in parallel. By disposing the air cleaner 49 apart from the exhaust gas purification case 50 serving as a high-temperature heat source and disposing the exhaust outlet pipe 82 between the air cleaner 49 and the exhaust gas purification case 50, the exhaust gas purification is performed. The influence on the air cleaner 49 due to the exhaust heat of the case 50 can be reduced.

  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.

  Further, the exhaust gas purification case 50 is disposed so as to project to the lower side of the side column 15, and a partition plate body (heat shield plate body) 16 is stretched below the side column 15. Then, the partition plate 16 is arranged at a height position near the double structure portion of the engine room cover 44. Therefore, against the heating of the exhaust gas purification case 50 and the like, the wire or harness on the side column 15 side can be easily protected by the partition plate 16 that is a heat shield plate. Further, exhaust from the guide grooves of the levers 12 to 14 opened in the operation plate body on the upper surface of the side column 15 toward the operator of the driver's seat 10b can be prevented.

  In the side column 50, as shown in FIG. 14, the main transmission lever 12 and the auxiliary transmission lever 13 are arranged side by side at the right front position of the driver seat 10 b, and in front of the auxiliary transmission lever 13, An airframe posture adjustment lever 161 for setting a right / left or front / rear tilt angle is provided. That is, the main transmission lever 12, the auxiliary transmission lever 13, and the body posture adjustment lever 161, which are operation levers of the traveling system, are collectively arranged in front of the side column 50 and near the steering handle 10c. . Further, the side column 50 is provided with a liquid crystal display 162 at a position in front of the main transmission lever 12, and the traveling state and working state of the combine which is a working machine is displayed on the liquid crystal display 162.

  As shown in FIG. 14, the side column 15 has a work clutch lever 14 disposed at a position behind the main transmission lever 12. The work clutch lever 14 serves as a power cut-off operation lever of the reaping device 3 and a power cut-off operation lever of the threshing device 5, and is provided in a guide groove provided on the upper surface of the side column 15. It is comprised so that it can tilt in the front-back direction along. When the working clutch lever 14 is positioned at the rear end of the guide groove, the power to both the reaping device 3 and the threshing device 5 is cut off. When the work clutch lever 14 is positioned in the middle of the guide groove, power is transmitted only to the threshing device 5, and when the work clutch lever 14 is positioned at the front end of the guide groove, power is supplied to both the reaping device 3 and the threshing device 5. Communicate.

  As shown in FIG. 14, the side column 15 has an accelerator dial 163, a constant rotation control switch 164, and a regeneration switch 165 in order from the front, closer to the driver's seat 10 b than the position where the work clutch lever 14 is disposed. The accelerator dial 163 is for adjusting the rotational speed of the diesel engine 20. The constant rotation control switch 164 is for operating on / off of constant rotation control for keeping the rotation speed of the diesel engine 20 constant. The regeneration switch 165 is for selecting whether or not the exhaust gas purification device (exhaust gas purification case) 50 can be executed. The accelerator dial 163, the constant rotation control switch 164, and the regeneration switch 165 are arranged on the left side of the driver's seat 10b so that the operator can easily use them.

  The accelerator dial 163 can manually adjust the engine speed, and is used to keep the speed of the engine 20 during operation constant. If the rotation speed of the engine 20 changes during the work, the performance of threshing deteriorates. Therefore, it is desirable to keep it constantly during the work, and the work is carried out while keeping the rotation speed with the accelerator dial 163, which is often used during the work. It is an operation dial. Further, the constant rotation control switch 164 turns on / off the eco mode that keeps the rotation of the diesel engine 20 constant and always performs stable threshing / selection even when the load of the threshing device 5 fluctuates.

  The regeneration switch 165 is constituted by a switch with a regeneration lamp, and notifies the operator that the clogged state of the exhaust gas purification device (exhaust gas purification case) 50 exceeds the limit amount by blinking the regeneration lamp. Then, when the operator turns on and operates the regeneration switch 165, regeneration of the exhaust gas purification device 50 is executed, and PM in the exhaust gas purification device 50 is combusted. When the regeneration of the exhaust gas purification device 50 is being performed, the regeneration switch 165 turns on the regeneration lamp to inform the operator that the regeneration of the exhaust gas purification device 50 is being performed.

  Next, the structure of the diesel engine 20 will be described with reference to FIGS. 15 and 16. As shown in FIGS. 15 and 16, 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. 15 and 16, 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.

  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. 15 and 16, an exhaust gas recirculation device (EGR device) 96 that takes in exhaust gas for recirculation is arranged in the intake manifold 19. 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.

  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.

  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. 15 and 16, an exhaust gas purification case for removing particulate matter in the exhaust gas of the diesel engine 20 as an exhaust gas purification device for purifying the exhaust gas discharged from each cylinder of the diesel engine 20. 50 (diesel particulate filter (DPF)). As shown in FIG. 15, 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 compactly arranged within the outline of the diesel engine 20 in a plan view (within the front-rear width and the left-right width). 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 is off.

  Above the exhaust manifold 83, a turbocharger 105 that supercharges air to the diesel engine 20 is disposed. 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, 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. 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 the exhaust system members (the exhaust gas purification case 50 and the turbocharger 105) and the arrangement of the intake system members (the air cleaner 49 and the exhaust gas recirculation device 96), improving the 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, 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, and a plate-like outlet pipe bracket 116 is provided on the rear end side of the exhaust outlet pipe 82. It is fixed by welding. The outlet pipe bracket 116 is bolted to the rear end side of the exhaust support plate 115, and the outlet side of the exhaust outlet pipe 82 is received by a bent portion provided on the upper edge of the outlet pipe bracket 116. That is, the exhaust outlet pipe 82 is supported through the outlet pipe bracket 116 on the rear end side of the exhaust support plate 115 on the left side of the cylinder head 91.

  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, 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, and the exhaust gas intake side (exhaust inlet side) of the exhaust gas purification case 50 is supported. Since the other end side (rear end side) of the exhaust outlet pipe is connected to the left support leg 113, the exhaust outlet pipe 82 can be formed elongated along the longitudinal direction of the exhaust gas purification case 50. It becomes possible to lower the temperature before discharging it out of the machine or to improve the silencing function.

  In addition to the configuration according to the above-described embodiment, as shown in FIG. 17, a heat shield plate 491 may be disposed between the air cleaner 49 and the exhaust outlet pipe 82 in the engine room 43. That is, the air cleaner 49 is disposed above the heat shield plate 491, and the exhaust gas purification case 50 and the exhaust outlet pipe 82 are disposed below the heat shield plate 491. Therefore, the exhaust heat from the exhaust gas purification case 50 and the exhaust outlet pipe 82 can be shielded by the heat shield plate 491, so that the influence of the exhaust heat from the exhaust gas purification case 50 and the exhaust outlet pipe 82 on the air cleaner 49 is further suppressed. it can. The heat shield plate 491 extends from the engine room cover 44 into the engine room 43. In the embodiment of FIG. 17, one end of the heat shield plate 491 is fixed to the auxiliary cover body 440 so that the front and lower sides of the air cleaner 49 are covered with the heat shield plate 491.

  Further, in the above-described embodiment, the clutch operating mechanism 151 is arranged on the lower left side of the handling pulley 86. However, as shown in FIG. 18, the clutch operating mechanism 151 is connected to the cutting stand 133, It may be arranged on the traveling machine body 1 side. In other words, the clutch operating mechanism 151 is fixed to the back surface of the cutting stand 133 and is disposed below the cutting input pipe 130. Then, a link mechanism 152 having one end connected to the sector gear 151 extends upward, and the other end of the link mechanism 152 is connected to the flow-in clutch 131. In the configuration of FIG. 18, the clutch operating mechanism 151 is disposed at a height position equivalent to the flywheel 94 (see FIG. 5) of the diesel engine 20, so that the clutch operating mechanism 151 Less affected.

  That is, in the embodiment of FIG. 18, the air heated through the engine room 43 flows upward due to the rotating blades 90 that rotate together with the handling pulley 86, so that the air is positioned at the same height as the cutting rack 133. Heating of the clutch operating mechanism 151 can be suppressed. As a result, excessive heating of the clutch operating mechanism 151 can be prevented, and failure of the electric motor 140 based on heating can be prevented. Further, since the clutch operating mechanism 151 can be disposed away from the exhaust side of the engine room 43 by disposing the clutch operating mechanism 151 on the traveling machine body 1 side as shown in FIG. 18, the rotary blade 90 is omitted. The number of parts can be reduced.

  In addition, the structure of each part in this invention is not limited to embodiment of illustration, A various change is possible in the range which does not deviate from the meaning of this invention.

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 82 exhaust outlet pipe 84 tail pipe 113, 114 support base

Claims (3)

A reaping device for reaping uncut cereal grains in the field, a threshing device for threshing the harvested cereal grains harvested by the reaping device, a traveling body for mounting the reaping device and the threshing device, and an engine room on the traveling body In a combine comprising an engine to be installed inside, an exhaust gas purification case for treating exhaust gas of the engine, and an air cleaner for introducing outside air into the engine,
The exhaust gas purification case, the air cleaner, and the exhaust pipe connected to the exhaust side of the exhaust gas purification case are arranged in parallel to each other,
The air cleaner is disposed on a rear upper side of the exhaust gas purification case, and the exhaust pipe extends between the exhaust gas purification case and the air cleaner .   The combine according to claim 1, wherein a heat shield plate is disposed between the air cleaner and the exhaust pipe.   A structure in which a radiator is opposed to a cooling fan provided on one side of the engine, and a shroud is provided on the exhaust side of the radiator, and a fresh air introduction pipe from an air cleaner is provided between the shroud and the engine. The combine according to claim 1 or 2, wherein a cooling water pipe that connects the cooling water passage of the engine and the radiator is arranged above the fresh air introduction pipe.

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