WO2017065117A1

WO2017065117A1 - Combine harvester

Info

Publication number: WO2017065117A1
Application number: PCT/JP2016/080029
Authority: WO
Inventors: 善雄楠瀬; 晋輔岡田
Original assignee: ヤンマー株式会社
Priority date: 2015-10-16
Filing date: 2016-10-07
Publication date: 2017-04-20
Also published as: CN112425351A; KR102095662B1; JP2017074027A; CN115643892A; CN108135130B; JP6484158B2; CN108135130A; KR20180034574A

Abstract

This combine harvester is provided with a reaping device 3 for reaping unreaped grain culms in a field, a threshing device 5 for threshing the reaped gain culms that were reaped by the reaping device 3, a traveling machine body 1 on which the reaping device 3 and the threshing device 5 are mounted, and an engine 20 disposed in an engine compartment 43 on the traveling machine body 1. The reaping device 3 is provided with a feeder house 31 that communicates with a threshing port in the front part of the threshing device 5, and the engine 20 is provided with an exhaust gas purification device 50 for purifying exhaust gas. A driving operation unit 15 provided to a driving unit 10 is disposed adjacent to the feeder house 31. A cavity 65a communicating from the engine compartment 43 to the feeder house 31 is provided on the bottom side of the driving operation unit 15, and a part of the cavity 65a opens above the feeder house 31.

Description

Combine

The present invention relates to a combine that harvests a grain by threshing the harvested culm with a threshing device while harvesting an uncut grain culm in a field by the reaping device.

2. Description of the Related Art Conventionally, a combine (work vehicle) as a farm working machine for a farm includes a traveling machine body equipped with an engine, and a pair of left and right traveling crawlers (traveling units) are mounted on the traveling machine body to drive a pair of left and right traveling crawlers While controlling and moving the field, etc., the stock of uncut cereal planted in the field is cut by the cutting blade device, the cereal is transferred to the threshing device by the cereal transfer device, and the cereal is transferred by the threshing device. It is configured to thresh the straw and collect the grain.

In the conventional combine, a pre-cleaner for introducing fresh air into the engine is provided above the fuselage, and a tail pipe for discharging exhaust gas from the engine is provided below the fuselage (patent) Reference 1). However, when an exhaust device including a tail pipe is provided below the fuselage, mud from the field is applied to the vehicle during travel, which not only lowers the exhaust resistance, but also may cause ignition due to the ingress of sawdust, etc. There is. Therefore, like the pre-cleaner, a combine has been proposed in which a tail pipe is disposed above the fuselage (see Patent Document 2).

In recent years, for the purpose of environmental purification, a combine provided with an exhaust gas purification device for purifying exhaust gas from an engine has been proposed (see Patent Document 1).

Japanese Patent Laying-Open No. 2015-132186 JP 2014-042477 A

Also, since the combine is equipped with 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, when the exhaust gas purification device is provided instead of the silencer provided in the combine in Patent Literature 2, as in the combine in Patent Literature 1, the exhaust gas purification device is heavy and has a capacity compared to the silencer. Also grows. Therefore, when an engine equipped with an exhaust gas purification device is installed in a combine, not only the arrangement of other parts in the engine room is affected by the arrangement position of the exhaust gas purification device, but also the length of the intake and exhaust paths. Incurs scaling.

In addition, if the precleaner and tail pipe are fixed above the threshing device, it will be affected by the installation position of the grain discharge conveyor (discharge auger) and the cereal conveyor, so the precleaner and tail pipe are located at the rear and the exhaust The route and the intake route become longer. On the other hand, when the exhaust path and the intake path are shortened, exhaust heat from the engine and the exhaust path may affect the driver's seat. In particular, when an exhaust gas purifying device that performs regeneration processing at a high temperature is mounted as in the combine in Patent Document 1, not only the exhaust heat of the exhaust path has a thermal effect on the intake path and the driver's seat, but also from the engine room. There are many thermal effects caused by exhaust heat.

The present invention has a technical problem to provide an improved combine by examining these current conditions.

The invention of the present application includes a harvesting device that harvests unharvested grain straw in a field, a threshing device that threshs the harvested grain straw harvested by the harvesting device, a traveling machine body that mounts the harvesting device and the threshing device, and the traveling machine body In a combine comprising an engine installed in the upper engine room and an operating part arranged above the engine room, the reaping device comprises a feeder house communicated with a front port of the threshing device, and the engine A hollow portion having an exhaust gas purification device for purifying exhaust gas, wherein an operation operation portion provided in the operation portion is disposed adjacent to the feeder house and communicates from the engine room toward the feeder house May be provided on the lower side of the operation unit, and a part of the cavity may be opened above the feeder house. The reaping device is configured to be adjustable up and down, and during the reaping operation in a farm field, the hollow portion has a wide opening above the feeder house.

In the above-described combine, the driving operation unit includes an operation tool disposed on an upper surface, and has a partition plate having an L shape in side view covering the upper and front sides of the cavity, and the upper and front portions of the partition plate A link mechanism connected to the operation tool may be provided in the space, the partition plate may protrude toward the feeder house, and a heat insulating material may be attached to a surface covering the cavity.

In the above-mentioned combine, the exhaust gas inlet side of the exhaust gas purification device is disposed so as to protrude from the operation part to the feeder house side, and the front and upper surfaces of the exhaust gas purification device are covered with the partition plate It is good.

In the above combine, the partition plate includes a bottom plate that covers the upper portion of the cavity portion and a back plate that covers the front portion of the cavity portion, and the bottom plate is inclined backward toward the reaping device and at the same time rearward. It is good also as what is provided so that it may skew toward the upper side toward.

In the above combine, one end of the combiner is connected to a cylinder head of the engine to support the exhaust gas purifying device, and the exhaust gas purifying device support bracket is connected to the exhaust gas purifying device support bracket and extends upward. An exhaust pipe support bracket that supports an exhaust outlet pipe of the exhaust gas purification device, and the exhaust pipe support bracket is arranged in parallel with the back plate of the partition plate and the exhaust gas purification device interposed therebetween It is good.

In the combine, an air cleaner and an attenuator supported by the engine room frame are provided in the intake passage of the engine, and the attenuator is disposed below the air cleaner and behind the exhaust gas purification device. The exhaust pipe support bracket may be disposed between the attenuator and the exhaust gas purification device.

Further, a reaping device for reaping uncut cereals in the field, a threshing device for threshing the reaped cereals harvested by the reaping device, a grain tank for storing grains threshed by the threshing device, and the reaping device, In a combine comprising the threshing device, a traveling machine body in which the Glen tank is installed, and an engine installed in an engine room on the traveling machine body, an intake path and an exhaust path of the engine are the Glen tank and the threshing apparatus. And a pre-cleaner that serves as a fresh air introduction part for the intake path and a tail pipe that serves as an exhaust gas discharge part for the exhaust path are provided above the fuselage. The intake pipe is disposed closer to the driver's seat than the path, and the intake pipe is disposed near the exhaust path in the intake path. Thereby, since the intake path is arranged between the driver seat and the exhaust path, the intake path can function as a heat shield member that blocks exhaust heat from the exhaust path behind the driver seat. Therefore, it is possible to prevent heat from the exhaust path such as the tail pipe from being transmitted to the operator sitting on the driver's seat. In addition, by configuring the intake pipe near the exhaust path with a metal pipe, not only deformation due to the heat effect from the exhaust path is suppressed, but also the rigidity of the intake path can be secured.

In the combine, an engine room frame constituting an engine room including the engine is erected from the traveling machine body, and a driving unit having the driver seat is installed on the upper side of the engine room, and the intake pipe and The tail pipe may be connected to the engine room frame behind the operation unit. Thus, the support structure can be simplified by intensively supporting the intake pipe and the tail pipe on the engine room frame, and the assembly and maintenance of the intake / exhaust path of the engine can be improved.

The combine is provided with an exhaust gas purifying device for purifying exhaust gas from the engine, and an exhaust outlet of an exhaust outlet pipe of the exhaust gas purifying device is inserted into an exhaust inlet of the tail pipe extending into the engine room. The exhaust pipe and the exhaust gas purifying device are supported by the engine via a first support bracket, while the tail pipe is supported by the engine room frame via a second support bracket. It is good. That is, the separately connected exhaust outlet pipe and tail pipe can be supported by the engine and traveling machine body that are in the same vibration relationship as the exhaust outlet pipe and tail pipe, respectively. Therefore, the exhaust outlet pipe and the tail pipe are not affected by another vibration unit, and damage or failure can be prevented. Further, since the tail pipe can be separated from the vibration system of the engine, the possibility of damaging the tail pipe due to the difference in vibration frequency between the diesel engine side and the traveling machine side can be remarkably suppressed.

In the above combine, the tail pipe is constituted by a double pipe composed of an inner pipe and an outer pipe, the exhaust outlet pipe is inserted into the inner pipe, and the second support bracket serves as the inner pipe and the outer pipe. It is good also as what is connected with each. By fixing each of the inner pipe and the outer pipe of the tail pipe with the second support bracket, the relative position of the inner pipe with respect to the outer pipe can be maintained and supported.

In the above-described combine, the second support bracket is configured in an L shape including a first connecting portion extending vertically and a second connecting portion extending forward from the lower end of the first connecting member. The middle part of the outer pipe is connected to the upper end of the first connecting part, the middle part of the first connecting part is connected to the engine room frame, and the front end of the inner pipe is connected to the front end of the second connecting part. It is good also as what is done. By configuring the second support bracket in an L shape, the tail pipe can be fixed so that the exhaust inlet extends into the engine room, and the high temperature exhaust gas exhausted from the exhaust outlet pipe can be sufficiently absorbed by the tail pipe. It can be cooled and exhausted to the outside.

In the combine, the intake pipe is connected to the engine room frame via a third support bracket and extends vertically on the side of the tail pipe, and the third support bracket is connected to the intake pipe. It is good also as what has a shape arrange | positioned ahead of the connection part with the said engine room frame. In the third support bracket, the connecting portion with the intake pipe is disposed in front of the connecting portion with the engine room frame, so that it can be installed with an appropriate gap between the intake passage and the exhaust passage. Mutual thermal effects in can be easily mitigated.

According to the present invention, a part of the engine room and the lower side of the operation unit are covered with the partition plate. Accordingly, not only the exhaust gas purifier or the engine that becomes a heating element but also the thermal influence on the operating part is suppressed, the cooling air flowing in the engine room is guided to the opening on the feeder house side, and the exhaust in the engine room is exhausted. It is possible to prevent the hot air from staying and improve the cooling effect in the engine room.

According to the present invention, the exhaust gas purification device is disposed so as to protrude from the left side surface of the operation unit toward the feeder house, and the exhaust gas purification device is covered with the partition plate. Therefore, not only can the air heated by the exhaust heat from the engine and the exhaust gas purifying device be prevented from flowing into the operating unit, but also the operator can be prevented from coming into contact with high-temperature components such as the exhaust gas purifying device serving as a heating element.

According to the present invention, since the outlet pipe support bracket is configured to be wide in the left-right direction (the same direction as the engine output shaft) as with the rear plate of the partition plate body, the cooling air passing through the engine room is fed to the feeder house side. The cooling air can be prevented from staying in the engine room. Further, since the outlet pipe support bracket is disposed between the exhaust gas purification device and the attenuator, the attenuator is less likely to receive radiant heat from the exhaust gas purification device.

It is a left view of the normal type combine of this invention. It is a right view of the combine. It is a top view of the combine. It is front sectional drawing of the combine. It is a left view of a driving part. It is a perspective view of the operation part seen from the left front. It is a perspective view of the operation part seen from the right rear. It is a perspective view which shows the flame | frame structure on the traveling body of a combine. It is a back perspective view showing the relation between an engine room frame and an engine. It is the perspective view seen from the left front which shows the frame structure around the operation part. It is the perspective view seen from the left rear which shows the frame composition of the operation part circumference. It is the perspective view seen from the right front which shows the structure of a driving | running part. It is front sectional drawing of an operation part. It is an expansion perspective view of the operation part seen from the left front. It is the expansion perspective view seen from the left front which shows the frame composition of 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 right view of a diesel engine. It is a left view of a diesel engine. It is a top view of a diesel engine. It is a perspective view of the engine room seen from the left front. It is a perspective view which shows a tail pipe support structure. It is a disassembled perspective view which shows the support structure of an intake system and an exhaust system. It is a left view of the normal type combine which becomes another embodiment of this invention. It is a right view of the combine. It is a top view of the combine.

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 according to the embodiment will be described with reference to FIGS. As shown in FIGS. 1 to 7, a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 (traveling portions) is provided. At the front of the traveling machine body 1, a reaping device 3 that captures the cedar while reaping is mounted by a single-acting lifting hydraulic cylinder 4 so as to be adjustable up and down around the cutting pivot fulcrum shaft 4a. A threshing device 5 having a handling cylinder 51 and a grain tank 7 for storing grain after threshing are mounted side by side on the traveling machine body 1. In addition, the threshing device 5 is disposed on the left side in the forward direction of the traveling machine body 1, and the Glen tank 7 is disposed on the right side in the forward direction of the traveling machine body 1.

A vertical conveyor 8 is provided to discharge grains in the grain tank 7 from the rear to the top of the grain tank 7 to the outside of the machine body. A grain discharge conveyor 9 connected to the transfer section 8a above the vertical transfer conveyor 8 is configured to be able to rotate the grain discharge port 9a at the front end to the side of the machine body. When the grain discharge conveyor 9 receives the grain transported upward by the vertical transport conveyor 8 behind the grain tank 7 from the transfer section 8a, the grain discharge conveyor 9 transports the grain in the horizontal direction toward the grain discharge port 9a. Drain the grain to the outside container or truck. Further, an auger stand 125 is erected on the upper surface of the threshing device 5, and the grain discharge conveyor 9 is supported at a storage position above the traveling machine body 1 via the auger stand 125. The grain discharge conveyor 9 is supported in a substantially horizontal posture by an auger stand 125.

A driving unit 10 is provided in front of the Glen tank 7 and on the front right side of the traveling machine body 1. The driving unit 10 includes a step 10a on which an operator gets on, a driving seat 10b, a handle column 11 provided with a steering handle 10c, a main transmission lever 12, an auxiliary transmission lever 13, work

clutch levers

14a and 14b, switches, and the like. There are provided a side column 15 provided with the above operating tools, an operating tool case 17 provided with operating tools such as a lever switch 16, and an electrical box 18 incorporating an engine controller and the like. In the present embodiment, the working

clutch levers

14a and 14b are exemplified by a cutting clutch lever and a threshing clutch lever that interrupt power transmission to the reaping device 3 and the threshing device 5, respectively. The conveyor position operation lever for operating 9 is illustrated.

The handle column 11 and the side column 15 are L-shaped in plan view so that the handle column 11 is disposed in front of the driver seat 10b, the side column 15 is disposed on the left side of the driver seat 10b, and the right side of the driver seat 10b is opened. It is erected from the traveling machine body 1 in a shape. The operation tool case 17 is disposed behind the side column 15, and the electrical box 18 is disposed behind the driver's seat 10b. The upper surface of the operation tool case 17 and the electrical box 18 that are disposed side by side are arranged from the back of the driver seat 10b. The operation tool case 17 and the electrical equipment box 18 are erected so as to cover the rear of the operation unit 10.

In the traveling body 1, a diesel engine 20 as a power source of each drive unit is disposed below the driver seat 10 b. 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.

The reaping device 3 includes a feeder house 31 that communicates with the handling port 5 a at the front of the threshing device 5, and a horizontally long bucket-like grain header 32 that is continuously provided at the front end of the feeder house 31. A scraping auger 33 (platform auger) is rotatably supported in the grain header 32. A take-up reel 34 with a tine bar is disposed above the front portion of the take-up auger 33. A clipper-shaped cutting blade 35 is disposed in front of the grain header 32. Left and right weed bodies 36 are projected from the left and right sides of the front part of the grain header 32. In addition, a supply conveyor 37 is installed in the feeder house 31. The lower surface portion of the feeder house 31 and the front end portion of the traveling machine body 1 are connected via the lifting hydraulic cylinder 4, and the cutting rotation fulcrum shaft 4a (feeder house conveyor shaft that is a cutting input shaft) is used as the lifting fulcrum. The reaping device 3 moves up and down by a lifting hydraulic cylinder 4.

With the above-described configuration, the tip side of the uncut grain culm between the left and right weed bodies 36 is scraped by the scraping reel 34, and the heel side of the uncut grain culm is trimmed by the cutting blade 35, and the rotation of the scraping auger 33 By driving, the harvested cereal grains are collected near the entrance of the feeder house 31 near the center of the grain header 32 in the lateral direction. The whole amount of the harvested cereal grains of the grain header 32 is conveyed by the supply conveyor 37 and is put into the handling port 5 a of the threshing device 5.

Also, the grain header 32 is connected to the front portion of the feeder house 31 via a left / right tilt adjustment fulcrum shaft 38 so that the left / right tilt can be adjusted. There is provided a hydraulic rolling cylinder 39 for adjusting the right / left inclination for rotating the grain header 32 about the left / right inclination adjustment fulcrum shaft 38, and the grain header 32 is trimmed by adjusting the horizontal inclination angle of the grain header 32 with the rolling cylinder 39. The blade 35 and the take-up reel 34 are supported horizontally with respect to the field scene.

Also, a handling cylinder 51 is rotatably provided in the handling chamber of the threshing device 5. A handling cylinder 51 is pivotally supported on a handling cylinder shaft 52 extended in the front-rear direction of the traveling machine body 1. On the lower side of the handling drum 51, a receiving net 54 that allows grains to leak is stretched. Note that spiral screw blade-shaped intake blades project outward in the radial direction on the outer peripheral surface of the front portion of the handling cylinder 51. With the above configuration, the harvested cereal mash introduced from the handling port 5 a is kneaded between the handling cylinder 51 and the receiving net 54 while being conveyed toward the rear of the traveling machine body 1 by the rotation of the handling cylinder 51. And threshing. The threshing of grains and the like smaller than the mesh of the receiving net 54 leaks from the receiving net 54. The sawdust or the like that does not leak from the receiving net 54 is discharged from the dust outlet at the rear of the threshing device 5 to the field by the conveying action of the handling cylinder 51.

In addition, a plurality of dust feeding valves (not shown) for adjusting the conveying speed of threshing in the handling chamber are pivotally mounted on the upper side of the handling cylinder 51 so as to be rotatable. By adjusting the angle of the dust feed valve, the conveying speed (residence time) of threshing in the handling chamber can be adjusted according to the variety and properties of the harvested cereal. On the other hand, as the grain sorting mechanism 55 disposed below the threshing device 5, a rocking sorter 56 for sorting specific gravity having a grain pan, a chaff sheave, a grain sheave, and a stroll rack is provided.

Also, as the grain sorting mechanism 55, there is provided a Kara fan 57 etc. for supplying sorting wind to the swing sorter 56. The threshing that has been threshed by the handling drum 51 and leaked from the receiving net 54 is caused by the specific gravity sorting action of the swing sorter 56 and the wind sorting action of the Kara fan 57, so that the grain (the most refined grain, etc.) In addition, it is configured so as to be selected and extracted into a mixture of grain and straw (second product such as grain with branch stems), and sawdust.

The lower side of the rocking sorter 56 includes a first conveyor mechanism 58 and a second conveyor mechanism 59 as the grain sorting mechanism 55. The grain (first thing) dropped from the swing sorter 56 by the sorting of the swing sorter 56 and the red pepper fan 57 is collected in the glen tank 7 by the first conveyor mechanism 58 and the cereal conveyor 60. The mixture of grain and straw (second product) is returned to the threshing start end side of the handling cylinder 51 via the second conveyor mechanism 59 and the second reduction conveyor 61 and is threshed by the handling cylinder 51 again. The sawdust and the like are configured to be discharged from the dust outlet at the rear of the traveling machine body 1 to the field.

Next, the mounting structure of the diesel engine 20 will be described with reference to FIGS. The diesel engine 20 is supported in an anti-vibration manner via the 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 65 that is a heat insulating plate 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 65. 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 65.

Further, a box-shaped wind tunnel case 46 is erected on the right end portion of the operation unit 10 in the traveling machine body 1 via an opening / closing fulcrum shaft. 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 wind) is taken into the wind tunnel case 46 from the opening on the right side of the wind tunnel case 46, and the cooling air is removed by the rotation of the cooling fan 48 from the opening on the left side 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.

It should be noted that a dust net is stretched in the opening on the right side 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.

Furthermore, a pair of left and right prop frames 71 constituting the engine room frame 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 prop frames 71. That is, the engine room 43 is formed (partitioned) by the partition plate 65, 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 and the threshing drive belt 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 from the output shaft 20a to the traveling crawler 2 via the traveling drive belt, and the driving force of the diesel engine 20 is directed to the threshing device 5 from the output shaft 20a via the threshing driving belt. Is output.

The engine room cover 44 includes a front surface portion 441 extending upward from the rear edge of the step 10a and an upper surface portion 442 extending rearward from the upper end of the front surface portion 441, and is configured in an inverted L shape in side view. Yes. The driver's seat 10b is mounted on the upper surface portion 442 of the engine room cover 44 via a seat support mechanism. The engine room cover 44 has a space inside due to a double structure, and the left side of the engine room cover 44 is connected to the wind tunnel case 46 so that the space in the engine room cover 44 communicates with the space in the wind tunnel case 46. An air introduction opening 443 is provided in each of the front surface portion 441 and the upper surface portion 442 of the engine room cover 44.

When air is introduced from the outside air into the engine room cover 44 through the opening 443, the air passes through the upper surface portion 442 of the engine room cover 44 below the driver's seat 10b and flows into the wind tunnel case 46. Therefore, when air flows in the engine room cover 44, a heat insulating effect is exerted between the operating unit 10 and the engine room 43, and heat to the operating unit 10 due to exhaust heat from the engine 20 and the exhaust gas purifying device 50. Can reduce the impact In the wind tunnel case 46, the air from the engine room cover 44 merges with the air taken in the wind tunnel case 46, flows into the engine room 43, and moves through the engine room 43 toward the feeder house 31 of the cutting device 3. pass. Thus, air is allowed to pass through the engine room 43 from the wind tunnel case 46 toward the feeder house 31, thereby acting as cooling air in the engine room 43.

9 to 15, the side column 15 which is a part of the driving operation unit is fixed to the left side of the engine room cover 44 and is arranged on the side of the driver seat 10b. One end of a column support beam frame 66 that supports the side column 15 is connected to the middle portion of the left column frame 71. The side column 15 has an L-shape in a side view with a cavity 65a cut out at the lower rear side, and a part of the exhaust gas purification device 50 provided above the engine is disposed in the cavity 65a. Yes. A part of the hollow portion 65 a of the side column 15 opens above the feeder house 31 of the cutting device 3.

As described above, the reaping device 3 is configured to be adjustable up and down, and a part of the hollow portion 65a is largely opened above the feeder house 31 during the reaping operation in the field. That is, when the harvesting device 3 is lowered around the harvesting pivot fulcrum shaft 4a by the lifting hydraulic cylinder 4 and the grain header 32 is placed at the grain harvesting position, it is in a position separated from the bottom plate 65b of the partition plate body 65. The upper surface of the feeder house 31 is located. Therefore, the hollow portion 65a has a wide opening 443 between the partition plate body 65 and the feeder house 31, and the cooling air flowing in the engine room 43 is easily discharged, thereby improving the heat dissipation effect in the engine room 43. .

The side column 15 is provided with operation tools such as operation levers 12, 13, 14a and 14b and operation switches on the upper surface, and supports a partition plate body 65 having an L shape in side view covering the upper and front sides of the cavity 65a. It is provided below the beam frame 66. The side column 15 has a structure in which the side column cover 67 covers the upper side and the front side of the partition plate body 65, and links that are connected to the operation levers 12, 13, 14 a, and 14 b in the space above and ahead of the partition plate body 65. A mechanism is provided. The partition plate 65 is configured as a heat insulating plate that protrudes toward the feeder house 31 of the cutting device 3 and has a heat insulating material attached to a surface that covers the cavity 65a.

A hollow portion 65a that is a left-right tunnel-like space is provided on the lower surface side of the side column 15 of the operation unit 10, and a part of the exhaust gas purification device 50 that is installed on the upper surface of the engine 20 is disposed in the hollow portion 65a. The exhaust gas purifying device 50 in the engine room 43 is configured to be visible from the upper surface side of the feeder house 31 of the reaping device 3. A partition plate body 65 having a heat insulating sheet attached is provided on the upper surface and the front surface of the hollow portion 65a. A cooling fan 48 is arranged on the side of the engine room 43 opposite to the feeder house 31 installation part, and a left-right tunnel shape is formed so that the cooling air of the cooling fan 48 is discharged from the engine room 43 to the upper surface side of the feeder house 31. A cavity 65a serving as a space was formed.

The exhaust gas purification device 50 is disposed on the engine 20 so that the longitudinal direction is along the left-right direction, with the exhaust gas inlet side being the left side (feeder house 31 side). By arranging the engine room cover 44 and the partition plate body 65 side by side and above the engine room 43, the front and upper surfaces of the exhaust gas purification device 50 are covered with the engine room cover 44 and the partition plate body 65. The exhaust gas outlet side (right side) of the exhaust gas purification device 50 is covered with the engine room cover 44, and the exhaust gas inlet side (left side) of the exhaust gas purification device 50 is covered with the partition plate 65. Therefore, not only the thermal influence on the operation unit 10 by the exhaust gas purification device 50 serving as a heating element is suppressed, but the cooling air flowing in the engine room 43 is guided to the opening on the feeder house 31 side, and the engine room 43 It is possible to prevent stagnation of exhaust heat air in the interior and improve the cooling effect in the engine room 43.

The exhaust gas inlet side of the exhaust gas purification device 50 is disposed so as to protrude from the left side surface of the side column 15 toward the feeder house 31 of the reaping device 3. And since the protrusion part from the side column 15 in the exhaust-gas purification apparatus 50 is covered with the partition plate body 65 protruded from the left side surface of the side column 15, it was heated by the exhaust heat by the engine 20 and the exhaust-gas purification apparatus 50. Not only can the air be prevented from entering the operating unit 10, but also the operator can be prevented from coming into contact with high-temperature components such as the exhaust gas purifying device 50 serving as a heating element.

The partition plate body 65 includes a bottom plate 65b that covers the upper portion of the cavity 65a and a back plate 65c that covers the front of the cavity 65a, and the bottom plate 65b is inclined downward toward the feeder house 31 (left side). At the same time, it is provided so as to skew backward and upward. The step 10 a of the driving unit 10 is stretched on the driving unit support frame 70 that is erected from the traveling machine body 1. One end (rear end) of the column support beam frame 66 is connected to the left column frame 71, and the other end (front end) is connected to the operation unit support frame 70 via the column support column frame 68. Further, the middle part of the column support beam frame 66 is connected to the mission case 42 via the mission connection frame 69.

As shown in FIGS. 10 and 11, the electrical box 18 is fixed to a position behind the engine room cover 44 with the bottom surface supported by the upper portions of the pair of left and right support columns 71 that are part of the engine room frame. An air cleaner 49 supported by the support frame 71 is disposed below the electrical equipment box 18. Each of the pair of left and right support columns 71 cantilever-supports beam frames 71a and 71b extending in the left-right direction in the middle, and connects the beam frames 71a and 71b. That is, the beam frames 71a and 71b of the pair of left and right column frames 71 are configured as beams between the column frames 71, and the air cleaner 49 is supported by one of the beam frames 71a and 71b (right beam frame 71b in this embodiment). Has been.

The electrical box 18 is arranged above the air cleaner 49 installed behind the engine room 43, so that it is not directly affected by exhaust heat from the engine 20 and the exhaust gas purifying device 50. That is, since the air cleaner 49 is disposed between the electrical box 18 and the engine 20, heating of the electrical box 18 due to exhaust heat in the engine room 43 is prevented, and each electronic component built in the electrical box 18 is Protected.

The operation tool case 17 which becomes a part of the operation unit is disposed adjacent to the left side (threshing device 5 side) of the electrical box 18. The electrical equipment box 18 and the operation tool case 17 disposed adjacent to the left and right are connected to each other. The operation tool case 17 is connected to and supported by the upper end of the left column frame 71 and the right side surface of the threshing device 5, and is disposed at a position behind the side column 15. A front support frame 127 that connects the front of the right side of the threshing device 5 and the left support frame 71 is provided, and the lower left side of the operation tool case 17 is connected to the connecting portion of the front support frame 127 with the threshing device 5. Yes.

As shown in FIGS. 9 to 11, the diesel engine 20 is arranged in the engine room 43 so that the engine output shaft 20 a extends in the left-right direction, and is supported by the engine bed 41 on the traveling machine body 1 in an anti-vibration manner. Yes. As shown in FIGS. 11 to 20, 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.

The 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 device 50 is located near the flywheel 94, and the exhaust gas extraction side (exhaust outlet side) of the exhaust gas purification device 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 device 50, and the exhaust gas temperature after the purification process is lowered. Let In the exhaust gas purification device 50, the exhaust gas intake side (exhaust inlet side) through which the exhaust gas before purification treatment passes is far from the cooling fan 48 and is difficult to hit 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 device 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.

The exhaust 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.

A fuel pump 98 connected to a fuel tank (not shown) and a common rail 99 are connected to each injector 97 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.

The turbocharger 105 is disposed on the front side of the cylinder head 91 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 device 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 device 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 and an exhaust gas recirculation device 96. That is, 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, and then supplied to each cylinder of the diesel engine 20.

An exhaust gas purifying device 50 (diesel particulate filter (DPF)) that removes particulate matter in the exhaust gas of the diesel engine 20 is provided to purify the exhaust gas discharged from each cylinder of the diesel engine 20. In the exhaust gas purification device 50, an oxidation catalyst 111 and a soot filter 112 are provided. Exhaust gas discharged from each cylinder of the diesel engine 20 to the exhaust manifold 83 is discharged outside the apparatus via the exhaust gas purification device 50 and the like. The exhaust gas purification device 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 purifying device 50 is configured in a horizontally long and long cylindrical shape extending long in a direction parallel to the output shaft 20a (crankshaft) of the diesel engine 20 in plan view. An exhaust inlet pipe 81 that takes in the exhaust gas is provided in a portion near the flywheel 94 in the exhaust gas purification device 50, and an exhaust outlet that discharges the exhaust gas after purification processing in a portion near the cooling fan 48 in the exhaust gas purification device 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 purifying device 50 via the left support leg body 113 and the right support leg body 114. That is, the exhaust gas purification device 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 device 50 is positioned above the exhaust manifold 83 with the longitudinal direction of the cylindrical exhaust gas purification device 50 facing the left and right direction of the diesel engine 20.

As shown in FIGS. 13 to 15, the exhaust gas intake side (exhaust inlet side) of the exhaust gas purification device 50 is positioned below the partition plate 65, and the exhaust gas purification device is located below the engine room cover 44. 50 exhaust gas extraction side (exhaust outlet side) is located. An exhaust inlet pipe 81 is provided on the exhaust gas intake side of the exhaust gas purification apparatus 50, and an exhaust outlet pipe 82 is provided on the exhaust gas extraction side of the exhaust gas purification apparatus 50. An exhaust inlet pipe 81 of the exhaust gas purification device 50 is connected to an exhaust manifold 83 of the diesel engine 20 via a turbine case 106 of the turbocharger 105, and the exhaust inlet pipe 81 and the exhaust manifold 83 are communicated with each other. . 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 from the exhaust gas purification device 50 through the tail pipe 84 to the outside of the machine.

The exhaust gas purifying device 50 is disposed so as to project from the lower side column 15 toward the feeder house 31, and a partition plate body (heat shield plate body) 65 is stretched below the side column 15. Then, the partition plate 65 is disposed at a height position near the double structure portion of the engine room cover 44. Therefore, it is possible to easily protect the wire or harness on the side column 15 side against the heating of the exhaust gas purification device 50 or the like by the partition plate body 65 that is a heat shield plate body. Further, exhaust from the guide grooves of the

levers

12, 13, 14a, 14b opened in the operation plate on the upper surface of the side column 15 toward the operator of the driver's seat 10b can be prevented.

As shown in FIGS. 16 to 21, the exhaust outlet pipe 82 is bent toward the left and right center side of the traveling machine body 1, and further, on the lower side of the partition plate body 65 (between the threshing device 5 and the glen tank 7). It is bent towards the back at the vicinity of the entrance. That is, the exhaust outlet pipe 82 has an S shape in plan view. Therefore, the exhaust gas purifying device 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 exhaust outlet pipe 82 is supported by the left support leg 113 for supporting the exhaust gas purification device 50 through the outlet pipe support bracket 115. The outlet pipe support bracket 115 includes a relay bracket 116 that extends upward from a middle part behind the left support leg 113, and a connection bracket 117 that extends from the upper end of the relay bracket 116 toward the engine room 43 (to the right). It consists of. The outlet pipe support bracket 115 is connected to the bent portion of the exhaust outlet pipe 82 at the upper edge of the connection bracket 117 and supports the exhaust outlet pipe 82.

As shown in FIG. 5 to FIG. 15 and the like, 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 downward. In addition, the rear end side of the tail pipe 84 extends rearward and obliquely leftward so that the rear end opening portion faces the threshing device 5 side. 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.

As shown in FIGS. 15 to 23, the tail pipe 84 is constituted by a double pipe including an inner pipe 84a and an outer pipe 84b, and the outer side of the inner pipe 84a and the inner side of the outer pipe 84b are connected by a plurality of spacers 84c. An inner tube 84a is fixed inside the outer tube 84b. The inner pipe 84a protrudes from the outer pipe 84b at the tip (exhaust inlet) of the tail pipe 84, and the rear end (exhaust outlet) of the exhaust outlet pipe 82 is inserted into the tip (exhaust inlet) of the inner pipe 84a of the tail pipe 84. Is done. The inner pipe 84a extends to the middle part of the outer pipe 84b along the exhaust gas movement direction. As a result, exhaust gas flows into the tail pipe 84 from the exhaust outlet pipe 82, and at the same time, outside air flows in from the gap between the exhaust outlet pipe 82 and the tail pipe 84, so that the exhaust gas flowing in the tail pipe 84 is discharged to the outside. Allow to cool with air.

The tail pipe 84 is supported by the left column frame 71 via the tail pipe support bracket 118. The tail pipe support bracket 118 is connected to the inner pipe 84a and the outer pipe 84b of the tail pipe 84, and is connected to the intake / exhaust path support frame 122 branched from the left post frame 71, whereby the tail pipe 84 is connected to the left post frame. 71 is supported. The intake / exhaust path support frame 122 is located on the left rear side of the left column frame 71 and extends upward from a middle portion of the left column frame 71 so as to be parallel to the left column frame 71.

The tail pipe support bracket 118 is provided with a connecting plate (first connecting portion) 119 extending vertically and a connecting pipe (second connecting portion) 120 extending forward from the lower end of the connecting plate 119. It is composed of a letter shape. The middle part of the outer pipe 84 b of the tail pipe 84 is welded and fixed to the upper end of the connection plate 119, and the middle part of the connection plate 119 is connected to the intake / exhaust path support frame 122 via the relay plate 121. The front end of the inner pipe 84a is fixed to the front end of the connection pipe 120 by welding. The front ends of the inner pipe 84a and the outer pipe 84b of the tail pipe 84 are connected via a plurality of spacers 84c, and one of the spacers 84c and the connecting pipe 120 are connected, so that the inner pipe 84a supports the tail pipe. It is fixed to the bracket 118.

The tail pipe 84 is fixed to the support frame 71 via the tail pipe support bracket 118, while the exhaust outlet pipe 82 is fixed to the engine 20 via the outlet pipe support bracket 115. That is, the separately connected exhaust outlet pipe 82 and tail pipe 84 can be supported by the engine 20 and the traveling machine body 1 that are in the same vibrational relationship as the exhaust outlet pipe 82 and tail pipe 84, respectively. Therefore, the exhaust outlet pipe 82 and the tail pipe 84 are not affected by another vibration unit, and damage or failure can be prevented. 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.

By configuring the tail pipe support bracket 118 in an L shape, the tail pipe 84 can be fixed so that the exhaust inlet extends into the engine room 43, and the hot exhaust gas exhausted from the exhaust outlet pipe 82 is tailed. The pipe 84 can sufficiently cool and exhaust to the outside. By fixing each of the inner tube 84a and the outer tube 84b with the tail pipe support bracket 118, the relative position of the inner tube 84a with respect to the outer tube 84b can be maintained and supported.

Further, since the inner tube 84a and the outer tube 84b are distributed and fixed at both end positions of the tail pipe support bracket 118, the double tube structure of the tail pipe 84 can be supported with high rigidity. The outer tube 84b is connected to the connecting plate 119 at a position facing the exhaust outlet portion of the inner tube 84a, whereby the exhaust outlet portion of the inner tube 84a is fixed by the connecting plate 119 via the spacer 84c. Therefore, both ends of the inner tube 84a having a shape extending to the middle portion of the outer tube 84b are supported by the tail pipe support bracket 118, and the inner tube 84a and the outer tube 84b can be fixed coaxially in cross section.

The tail pipe support bracket 118 is fixed to the back side of the intake / exhaust path support frame 122 via the relay plate 121. The connecting plate 119 of the tail pipe support bracket 118 is formed with an adjustment slot that is vertically long and vertically aligned, and is fastened when the tail pipe support bracket 118 can be adjusted with respect to the relay plate 121 so that the vertical mounting position can be adjusted. Further, the relay plate 121 is formed with an adjustment slot that is vertically aligned in the left-right longitudinal direction, and is fastened when the relay plate 121 can be adjusted to the left-right attachment position with respect to the intake / exhaust path support frame 122. Therefore, by adjusting the fastening position of the tail pipe support bracket 118 and the relay plate 121, the support position of the tail pipe 84 can be easily adjusted, and processing errors and assembly errors can be absorbed. The connecting plate 119 may be provided with left and right longitudinal adjustment slots, while the relay plate 121 may be provided with upper and lower longitudinal adjustment slots.

The air cleaner 49 communicates with a pre-cleaner 85 serving as a fresh air introduction unit that takes in air from outside air. Similar to the tail pipe 84, the pre-cleaner 85 is disposed between the threshing device 5 and the grain tank 7 and extends above the threshing device 5 and the grain tank 7. The pre-cleaner 85 is fixed to the front surface of the cereal conveyor 60 via the pre-cleaner support bracket 126 and is disposed in front of the cereal conveyor 60. The lower end (intake outlet) of the pre-cleaner 85 is connected to the upper end (intake inlet) of an intake pipe 87 formed of a metal pipe (iron pipe) via a bellows pipe 86.

The intake pipe 87 extends in the vertical direction on the right side of the tail pipe 84 (on the operation unit 10 side), and includes a pre-cleaner 85 arranged above the threshing device 5 and a bellows pipe 86 extended in the vertical direction. It is connected through. In other words, the intake path of the diesel engine 20 is disposed closer to the driver seat 10b than the exhaust path, and the intake pipe 87 in a location close to the exhaust path in the intake path is formed of a metal pipe. The intake pipe 87 is disposed behind the operation tool case 17 behind the side column 15, and is supported by the left column frame 71 together with the tail pipe 84. That is, the operation tool case 17 is disposed at a position behind the side column 15 and in front of the tail pipe 84 and the intake pipe 87.

With this configuration, the operation tool case 17 and the intake pipe 87 are arranged side by side between the driver's seat 10b and the tail pipe 84. Therefore, the operation tool case 17 and the intake pipe 87 can function as a heat shield member that blocks exhaust heat from the tail pipe 84 behind the driver seat 10b. 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. In addition, since the intake pipe 87 is formed of a metal pipe, not only deformation due to thermal influence from the tail pipe 84 is suppressed, but also the rigidity of the intake path can be ensured.

The intake pipe 87 is fixed to the left column frame 71 via an intake pipe support bracket 123 and is disposed at substantially the same height as the tail pipe 84. In the present embodiment, the lower end (intake outlet) of the intake pipe 87 is positioned at substantially the same height as the front end (exhaust inlet) of the tail pipe 84, and the upper end (intake inlet) of the intake pipe 87 is located behind the tail pipe 84. It is located at almost the same height as the end (exhaust outlet). The installation area of the intake pipe 87 in the vertical height direction may be wider than the installation area of the tail pipe 84.

The intake pipe support bracket 123 is connected to the middle part of the intake pipe 87 and is connected to the intake / exhaust path support frame 122 branched from the left support frame 71, so that the intake pipe 87 is supported by the left support frame 71. The intake pipe support bracket 123 is welded and fixed to the outer peripheral surface in the middle of the intake pipe 87 and has a bolt hole on the back surface, and is bolted to the relay plate 124 fixed to the intake / exhaust path support frame 122. The relay plate 124 is fixed to the upper end of the intake / exhaust path support frame 122 by welding, and a connecting portion with the intake pipe support bracket 123 extends forward of the intake / exhaust path support frame 122. Therefore, the intake pipe support bracket 123 is fixed to the intake / exhaust path support frame 122 in front of the tail pipe support bracket 118.

The relay plate 124 is configured in a crank shape in plan view, and includes a connection portion with the intake pipe support bracket 123 on the front side and a connection portion with the relay plate 121 connected with the tail pipe support bracket 118 on the rear side. . That is, by configuring the relay plate 124 in a plan view crank shape, the intake pipe support bracket 123 and the tail pipe support bracket 118 can be fixed before and after the relay plate 124. Further, in the relay plate 124, a connecting portion with the intake pipe support bracket 123 extends to the left side from the intake / exhaust path support frame 122, and a front support frame having one end connected in front of the right side surface of the threshing device 5. 127 is connected to the other end of 127. Further, one end of the relay plate 124 is connected to the rear side of the right side of the threshing device 5 and is connected to the other end of the rear support frame 128 that extends in the front-rear direction.

By supporting the intake pipe 87 and the tail pipe 84 in a concentrated manner on the intake / exhaust path support frame 122, the support structure can be simplified, and the assembly and maintenance of the intake / exhaust path of the engine 20 can be improved. Further, since the relative position of the tail pipe support bracket 118 and the intake pipe support bracket 123 can be fixed by the relay plate 124, an appropriate gap can be provided between the intake path and the exhaust path, and mutual thermal influences on the intake and exhaust can be reduced. Can be easily relaxed. Further, the relay plate 124 connected to the intake pipe support bracket 123 and the tail pipe support bracket 118 is connected so as to be sandwiched by the front and rear support frames 127 and 128 connected to the front and rear of the threshing device 5, respectively. Yes. Therefore, the threshing device 5 ensures the rigidity of the intake / exhaust path support frame 122, and the intake / exhaust path of the engine 20 can be supported with high rigidity.

In the intake path of the engine 20, an attenuator 88 that attenuates the intake sound from the precleaner 85 is interposed between the air cleaner 49 and the intake pipe 87. The attenuator 88 is disposed below the intake pipe 87, and communicates with the lower end (exhaust outlet) of the intake pipe 87 through the upstream intake relay pipe 89. The upstream intake relay pipe 89 has a U shape in plan view, and is connected to the intake inlet on the left side surface of the attenuator 88 located in front of the intake pipe 87.

As shown in FIGS. 16 to 22, the attenuator 88 is cantilevered by an attenuator support bracket 129 connected to the left column frame 71 below the intake pipe support bracket 123, and is located behind the exhaust gas purification device 50. In the side view, the engine 20 is disposed at a position between the EGR device 96 and the tail pipe 84. The upstream intake relay pipe 89 is bent around the lower side of the tail pipe 84 and is connected to the attenuator 88.

The attenuator 88 is disposed on the lower left side of the air cleaner 49, and the intake outlet of the attenuator 88 communicates with the intake inlet of the air cleaner 49 through the downstream intake relay pipe 90. The intake relay pipe 90 is located below the air cleaner 49 and on the right side of the attenuator 88. The intake relay pipe 90 is configured in an L shape when viewed from the front, and connects the exhaust inlet side to the right side surface of the attenuator 88, while on the exhaust outlet side. Is connected to the lower surface of the air cleaner 49.

Also, an outlet pipe support bracket 115 that supports the exhaust outlet pipe 82 is disposed between the exhaust gas purification device 50 and the attenuator 88. The connection bracket 117 of the outlet pipe support bracket 115 is disposed at the same height as the attenuator 88, and the front surface of the attenuator 88 is covered with the connection bracket 117 of the outlet pipe support bracket 115. As a result, the attenuator 88 is less likely to receive radiant heat from the exhaust gas purification device 50. Since the connecting bracket 117 of the outlet pipe support bracket 115 is configured to be wide in the left-right direction (the same direction as the output shaft 20a of the engine 20) like the back plate 65c of the partition plate body 65, the cooling that passes through the engine room 43 is performed. Air can be guided to the feeder house 31 side of the reaping device 3, and the retention of cooling air in the engine room 43 can be suppressed.

In the engine room 43, the air cleaner 49 and the attenuator 88 are arranged on the left and right in a plan view, while the intake pipe 87 and the attenuator 88 are arranged on the front and rear in a plan view. Accordingly, since the components of the intake path of the engine 20 can be efficiently and compactly arranged, the intake path can be shortened. In the engine room 43, an air cleaner 49 and an attenuator 88 are arranged adjacent to each other on the left and right sides of the exhaust gas purification device 50 with the exhaust outlet pipe 82 interposed therebetween. Therefore, in the engine room 43, each component constituting the intake path of the engine 20 constitutes intake and exhaust of the engine 20 while suppressing the thermal influence from the exhaust gas purification device 50 serving as a high-temperature heating element. The placement efficiency of each part can be improved.

In the above-described embodiment, the driving unit 10 has been described by taking an example of an open ceiling type combine. However, as shown in FIGS. 24 to 26, the combiner in which the cabin 10x having the driving seat 10b is mounted as the driving unit 10 is mounted. It is also applicable to. The combine shown in FIGS. 24 to 26 forms an engine room 43 below the cabin 10x, and the exhaust gas purification device 50 in the engine room 43 is configured to be visible from the upper surface side of the feeder house 31. Similarly to the above-described embodiment, the intake path and the exhaust path of the engine 20 are arranged behind the cabin 10x, and the tail pipe 84 and the intake pipe 87 are intensively supported on the engine frame that supports the cabin 10x.

The configuration of each part in the present invention is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention. 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 according to the embodiment will be described with reference to FIGS. 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 of the traveling machine body 1, a reaping device 3 that captures the cedar while reaping is mounted by a single-acting lifting hydraulic cylinder 4 so as to be adjustable up and down around the cutting pivot fulcrum shaft 4a. A threshing device 5 having a handling cylinder 51 and a grain tank 7 for storing grain after threshing are mounted side by side on the traveling machine body 1. 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).

1 traveling machine body 3 reaping device 5 threshing device 7 grain tank 15 side column 16 lever switch 17 operation tool case 18 electrical box 20 diesel engine 31 feeder house 43 engine room 44 engine room cover 49 air cleaner 50 exhaust gas purification case 65 partition plate ( Heat shield plate)

65a Cavity

65b Bottom plate

65c Back plate 66 Column support beam frame 82 Exhaust outlet pipe 84 Tail pipe 84a Inner pipe 84b Outer pipe 84c Spacer 85 Pre-cleaner 86 Bellows pipe 87 Intake pipe 88

Attenuator

113, 114 Support leg body 115 Outlet pipe support bracket 116 relay bracket 117 connection bracket 118 tail pipe support bracket 119 connection plate 120 connection pipe 121 relay plate 122 intake / exhaust path support frame 123 intake pipe support bracket 124 relay plate 125 auger stand 126 precleaner support bracket 127 front support frame 128 rear support frame 129 Attenuator support bracket

Claims

Harvesting device that harvests unharmed grain pods in the field, threshing device that threshs the harvested corn shears harvested by the harvesting device, a traveling machine body that mounts the harvesting device and the threshing device, and an engine room on the traveling machine body In a combine comprising an engine installed in the engine and a driving unit disposed above the engine room,
The reaping device includes a feeder house that communicates with a front opening of the threshing device, and the engine includes an exhaust gas purification device that purifies exhaust gas,
A driving operation unit provided in the operation unit is disposed adjacent to the feeder house, and a cavity communicating from the engine room toward the feeder house is provided below the operation operating unit. The combine is characterized in that a part of the opening is opened above the feeder house.
The driving operation unit has an operation tool disposed on an upper surface thereof, and has a partition plate having an L shape in side view covering the upper and front sides of the cavity, and the operation unit is provided in the space above and in front of the partition plate. A link mechanism connected to the tool is provided,
The combiner according to claim 1, wherein the partition plate protrudes toward the feeder house, and a heat insulating material is attached to a surface covering the cavity.
An exhaust gas inlet side of the exhaust gas purification device is disposed so as to protrude from the operation unit to the feeder house side, and a front surface and an upper surface of the exhaust gas purification device are covered with the partition plate. The combine according to claim 2.
The partition plate includes a bottom plate that covers the upper portion of the cavity and a back plate that covers the front of the cavity,
The combine according to claim 2 or 3, wherein the bottom plate is provided so as to obliquely move downward toward the reaping device and simultaneously obliquely upward toward the rear.
An exhaust gas purification device support bracket having one end connected to the cylinder head of the engine to support the exhaust gas purification device, and connected to the exhaust gas purification device support bracket and extending upward to extend the exhaust gas purification device And an exhaust pipe support bracket for supporting the exhaust outlet pipe of
The combine according to claim 4, wherein the exhaust pipe support bracket is disposed in parallel with the back plate of the partition plate and the exhaust gas purifying device being sandwiched.
In the intake path of the engine, an air cleaner and an attenuator supported by the engine room frame are provided,
The attenuator is disposed below the air cleaner and behind the exhaust gas purification device, and the exhaust pipe support bracket is disposed between the attenuator and the exhaust gas purification device. The combine according to claim 5.